How Does Projector Work?

Now many of the manufacturers have announced or are shipping their first pocket projector either as stand-alone units or integrated into other handheld devices. Like a laptop, a digital camera, a cell phone and so on. You can expect to find some of these models under other names as private labeling is a common practice. Pocket projectors are also refer to be pico projector, small projector, micro projector and so on.

Picos use LEDs as their light source, which means the light source will outlive the projector's useful life and provide efficient use of your battery power. The display technology will either be DLP or LCoS and you might consider looking at both technologies to see if you have a preference. Laser technology is also in development, but to our knowledge no laser units are shipping. So there are also some laser technology in the market which can be used to different occasion like the party.

Since projectors tend to get less bright the smaller you make them, it should come as no surprise that mini projectors are dimmer than their bigger cousins. As the new technology are difficult to be intergrated into it, small projectors, like cell phone projectors is lacking of contrast and brightness.

Micro projector will migrate into the devices they attach to. This should happen quickly as it is a natural evolution that eliminates cables, reduces cost and greatly enhances usefulness. The driving factor will be cost, power management, space considerations and market appeal. In other words, for your iPod to become an iProjector, it will need to maintain its look, feel and usefulness and offer a benefit that justifies the cost increment

So with the development of science and technology, we look forward the new features and high definition can be intergrated into the small projector, by then, mini projectors and cell phone projector will hold a great market and the popularity will be increased rapidly.
Reference: http://visitkevin.wordpress.com

Merit and Demerit of Pocket Projectors

In order to cater to the requirement of customers, projectors are designed to be
more and more small. Now a mini projector can be as same as a palm, and the weight can be around 450g. Main cell phone manufactures are also putting new technology into it, they intergrate projector into cell phones to atrract more customers. However,compared with the standard projector, it also has some advantages and disadvantages, now we are going to introduce it.

Advantages of Pocket Projectors :

Very light weight at just a few ounces

Very small. Can be slipped into a pocket.

No “rainbow” on DLP variety (LCos does not have rainbows)

Wider color space & good color saturation

Battery opperated – no power cords required for presentations under an hour

20,000 – 30,000 hour lamp life

LED lamps are 100% mercury free

Environmentally friendly with LED lamp’s low power consumption

Turns on in seconds. Instant turn off with no cooling time required

Disadvantages of Pocket Projector :

Not bright enough for medium or large groups

Must be close to screen/wall surface

Fewer connectivity options

Serious audio limitations

Low resolution

So pocket small projector is more convenient for entertainment, but for the

practical applicability, it is nothing like a standard projector, so it can be good partner for a businessman, and for a long travel to display the pictures.

Reference: http://www.myarticlecode.com/?p=101449

Is a Parking Sensor System Usefull?

There are many car owners like to ask:"should I buy a parking sensor? Is it helpful?" The answer is:"sure!" For whether installing a parking sensor, it completely depends on your requirement, and we can definitely say that: A parking sensor kit system is helpfull, as it can assist a driver to park or reverse more safely and easily.

A complete automobile parking sensor kit is what every automobile needs, it is containing a rear view camera, 4 sensors, smart control box, and an alarm that beeps to let you know of any obstacles behind your vehicle. Whether you drive a luxury automobile like Mercedes, BMW, Ferrari, Porsche, or a city automobile like the MINI, Ford, Smart, etc. A reverse parking sensor kit will come complete with everything you require!

Now many of the car reverse parking sensor with monitor is constructed and designed to makes reverse manoeuvring safe and straightforward. Using a high-tech ultrasonic expertise, this rearview parking sensor exactly measures the distance in real time. Both the direction and exact distance of any obstacles are shown on a rear view monitor, which can conveniently be installed anywhere in the automobile.

Especially for a new driver, it is more essential, as many new drivers are feared of parking and reversing, however with a parking sensor, you can park more easily, as you can learn the distance bewteen the obstacles from the display of the car rear view mirror monitor. So you can decide whether you can park in a limited pot. Well, what should be mentioned is that, you should not rely on a parking sensor kit too much, as there are also some blind spots when driving. After all, rear parking sensor is only an assistant device, it can not control everything, so you should have a good sense and a good responsibility.

Reference: http://blog.espow.com/car-parking-sensor-tips/

Mini Projector-Aiptek V10

When you want to have a meeting, in the past, you had to carry a huge projector to the meeting room to make some presentation.But now, you can leave your laptop behind. A small projector-Aiptek V1o Projector has a built-in 1 gig of memory and SD-card reader, you can show your presentation even on the plane.

This small projector is also often called as mini projector. It is very convenient for you watch your favorite movie or TV showor on a 2 inch screen. You can fit the Pocket projector into your pocket and you can be able to project a 50 inch large screen within distance from 21cm to 180cm Projects image from connecting to iPod, DV, DSC, game console or cell phone (via AV-out) or from playback in embedded Record content on any surface! And with this pocket projector support for up to 8GB SDHC cards, you can share the video hours and ours with you.It also comes with Li-Ion battery and remote control.

Specification:
Model: Pocket Cinema V10
Display:
Light Source: White Light LED
Display Technology LCoS (Liquid Crystal on Silicon)
Screen Format: 4:3
Brightness: 10 ANSI Lumens
Graphic Mode: VGA
Resolution: 640 * 480
Projection Lens
Lamp Type: LED
Projection Dimension: 6" - 50" (15cm - 127cm)
Projection Distance : 25cm - 180cm
Focus Adjustment: Manual
Projection Mode: Front
Connectivity:
Connection; External 3-in-1 video port, Internal memory or SD card
Photos: JPEG
# Video: MP4, AVI, ASF
Audio: MP3(surround sound(0.5vt))
Audio Output: Two Speakers
External Memory: Support SD/MMC/MS Pro
Internal Memory: 1GB
Power Source: Power Cable and NP120 Li-Rechargeable(at least 1hr play duration)
Remote Control: Yes
Free Software: AV Media Convertor
Dimension: 125mm*55mm*23mm
Features: 1G Internal Memory
Supports: JPEG, ASF, AVI, MPEG-4
Built in Li-ion Battery

Take a small projector with you, share your favourate films and pictures with your relatives and friends, enjoy a better life with it now!
Reference: http://www.espow.com/wholesale-mini-pocket-cinema-50-handheld-led-projector-640x480.html

A new generation of personal projector-Pico Projector

A new generation of personal projectors that, for better or worse, have been called pico projector by the industry. The name of pico was intended to mean a very small projector, but pico was pushing it. Technically speaking, pico implies a trillionth of something and while these puppies are tiny compared to the traditional light canon, they're a far cry from a trillionth. Ah, the power of marketing!

The truth is these 'video flashlights' are pocket size, and in time they'll be bundled in everything from PCs to cell phones. Now pocket projector would have been a good name for this industry also.

Pocket projector is a handheld projector designed to project your pics, presentations, video, or any electronic documents onto any surface, anytime, anywhere, and also for personal viewing or viewed by a tiny group. Audio can be supported by plugging in a headset as well as a few micro projectors have also been bulit in a tiny speaker. You will likely find the performance of these speakers wanting due to the shortage of size and power.

The micro projector will go ahead to be integrated in to other mobile technologies such as computers, laptops., cameras, cell rings, media players, PDAs and gambling devices on condition that the power management and cost can be effectively managed. Then they are widely used in different fields and occations.

So if you are in a room with plenty of light, you'll find that the picture improves in the event you reduce it is size; whereas, in a darker room you can enjoy a bigger picture when you don't have competing light. If you have a cell phone projector, you will enjoy a film and make a presentation to your relatives or your friends of your images, your favourate films. Not one of the mini projector has a zoom lens, so picture size is decided solely by the focal range of the small projector.

All in all, with a pico projector, you will enjoy a colorful life and take it everywhere for your best presentation! Do not miss it!
Reference: http://www.projectorcentral.com/pico_projectors.htm

Instructions For Connecting a Car MP3

Now more and more car owners are decorating their car with different car entertainment, like a car mp3, car DVD player, car stereo, and so on. The most simple one is fit a car mp3 in your vehicle, as it is very easy to hook up. You can only need to connect it with thecigarette lighter.

If there basically is not a case huge to store all the CDs you require to take with you in the automobile, you may require to add an MP3 player. To play MP3 tunes in your automobile, you can get a used head unit that plays MP3 CDs, install a hard drive player, or hook up a transportable to your current stereo head unit.

I ever installed an FM modulator that hides behind the control panel and connects directly to the antenna and power, as against one that hangs down from the cigarette lighter. I followed the installation instructions that came with it. FM modulators of this type have an on-off switch for the antenna, which I put in a discreet place below the steering wheel.


The most straightforward route is to install a new head unit that plays MP3 and regular CDs. Most major aftermarket car stereo manufacturers offer MP3-compatible head units. You can transmit a lot of MP3-formatted songs on a CD, but this solution still entails carrying around CDs. You will also most likely require to have the unit professionally installed. When you are looking for an MP3-compatible head unit, make sure that it easily helps you navigate file and folders on your discs.


If you want the ability to carry your tunes with you at any place, a portable MP3 player connected with your car stereo is the logical choice. Because of its popularity, there are many schemes customized for the iPod. Some cars come with iPod compatibility, and aftermarket solutions also have.

If you have a different brand of MP3 player, the cheapest solution uses an adapter that plugs into your car stereo's cassette player. But most new car stereos eschew cassettes can support CDs, so a cassette adapter may not be a choice. Another method is to get an adapter cable that plugs directly into your head unit. To go this route, your car stereo needs a spare input, such as an unused CD changer port. If you're not sure if you have an input available, you can check the owner's manual for your vehicle or stereo or look up your stereo or vehicle information online.

To install an adapter cable, you will need to plug it into the rear of the stereo by either removing the head unit or reaching under and behind the dashboard. Some head units come with an 1/8-inch auxiliary input mounted in their face. Do not block your rear view mirror monitor, with these solutions any of them, you will need to control your music selection from the MP3 player, as only the volume will be controllable from the car stereo itself.

Once you have connected, you'll possibly want a bracket or a cradle to hold your MP3 player so that you can see the screen. A wide variety are available, which mount to your windshield, your dashboard, and even your air vents. Choose a mounting method that makes the screen easy to view while you are driving but doesn't block the air bag or any of your dashboard functions.

Refer to: http://global-electronic.blogspot.com/

History of Projectors

Do you still remember that when your school teacher lugged out a huge projector to show you overhead images?And also when we are at a very young agem, we are watching movie with a huge projector? When the teacher is setting up the slide-show projector, and all the students in the middle of the room had to move their desks aside; then the big screen had to be set up at the front of the classroom. What a hassle it is! But now, with the development of science, we can see, the industry has created many new technology to make it changed. Through this history of projectors, new technology has definitely achieved its goal. However the projector technology started long before we spent the time in the classroom.
In 1420 the First Projector Was Created
Johannes de Fontana , envisioned in a drawing with the first idea of projecting an image on a surface In 1420. It was a sketch of a monk holding a lantern. In the side of the lantern, there was a small translucent window had an image of a devil holding a lance. The image, probably drawn on a thin sheet of bone, was projected onto a wall by the flame in the lantern. However without a lens, the image on the wall were very blurry.

The first overhead projector was used for police identification work. It adopred a glassine paper roll over a 9-inch stage allowing facial characteristics to be rolled across the stage. The U.S. Army in 1945 was the first to use it in quantity for training as World War II wound down. Then It was began to be widely used in businesses and schools in the late 1950s and early 1960s.


Gradually the Projector Was Improved

The magic lantern of those days looked like a kerosene-fired slide projector. The lantern slides were large, bulky, complex objects, made of glass, paint, wood and metal. Some had built-in mechanical features, such as pulleys and winches, so the lantern’s projected images could be given a very crude version of animation. Some slides could even project complex, constantly-moving screen displays.

The Multimedia Projector Answered the Call

In the mid 1990s, with the hardworking of scientists and engineers, new technology was created that eventually led to the first multimedia projector. The newest technology of the day was digital processing. Applying digital principals to projectors permited the development of digital light processing (DLP). DLP technology, created by Texas Instruments, takes the reflective power of more than 1.3 million microscopic mirrors, and hinges them on a digital micromirror device (DMD) chip. The first DLP projectors produced grainy images, but the technology has greatly improved from then on, and now the brightest images ever can be manufactured in a multimedia machine.

Multimedia Projectors’ Future Seems Bright

Multimedia projectors will be injected with so many technological advancements. And considering let it can be carried everywhere. Right now, there’s no end in sight, at least not in the near future. So what will be coming next?

As the wireless age creeps in, projectors won’t have those bulky VGA cables connecting the projector to your laptop. And, with the onset of PDAs, you’ll soon be able to manage your entire presentation in the palm of your hand. If you use multimedia projectors now, just think of the possibilities then!

Now mini projectors and small projectors are coming out from the market, according to the requirement of the customers, manufactures are trying their best to develop more new and attractive products to cater to the requirement of customers, and also the pocket projector will be a trend in the near future!

Reference: http://cobby2510.vox.com/

Parking Sensor Tips

What is Automotive Parking Sensor

Automotive parking sensor detect obstructions behind you and also in front of you, it can aid your parking and reversing also enable you to get into those tight spots without crashing your car. They can emit a cone of sound behind your car which bounces of obstructions behind and returns to the sensor.

Parking Sensors in Action
The time taken for these sound waves to bounce and return off obstructions behind your car is how they measure the distance behind you. And then control well for whether they could park or reversing at this limited distance. This is the same technology that you will be familiar with having seen fitted as OEM equipment on cars from new and are supplied trade to many bodyshops.


What Will You Get From Parking Sensor?
Apart from some obvious safe advantages, financially rear parking sensor will pay for themselves if it prevents you from having just one accident. Regardless of your insurance there is always that "excess" on your policy. It will also help you park in confidence in front of people without damaging your pride. you can retrofit any car or truck with ultrasonic parking sensors to aid you or someone you know with the task of parking their vehicle.

Whether to help the one who crashes into the garage wall, or you would just like an extra safety factor when the big rig is in reverse. Thus, vehicle parking sensor is the "assistance" you've been looking for. Better than a curb on the garage floor, if your rear view mirror monitor stays mounted on the car, so it's always there to aid the driver with reversing and parking. Despite where the vehicle travels, the parking sensor kit will be there to let your driving become more safely!

Reference: http://visitkevin.wordpress.com/2010/08/23/carparkingsensor/

Features of Pico Projector

Micro projector can allow you to build a theater whereever you go, but without a suitable projection surface, your images will be distorted, dim, or otherwise it will be difficult to view. When there is no smooth white wall available, a portable projection screen can come quite in handy. The instructions will tell you how to make a screen quickly and inexpensively. You may learn some tips for how to improve your pico projector screen.

Pico projector is ideally sized for making presentations of on-the-go business or casual video sharing with friends without the screen size limitations of a mobile handheld device. Importantly, this micro projector will connect with a wide range of mobile devices , such as iPhone, Camcorders, iPod, iTouch, DVD Players, DV-Cams and Digital Cameras .

Those projector is positioned between 8 to 189 inches (0.20 to 4.8 m) from the screen. Of course as the low lumens rating compared to a conventional projector, the brightness of the projected image for the largest image sizes is crucially dependent on the ambient light level. Generally, the product is designed to use in lower light levels with a smaller image size than conventional meeting room projectors. So it is easy for customers to carry this gadget everywhere at any time.

A good pico projector can have a good contrast ratio (full on / full off) of 2,000:1 which contributes strongly to picture quality as does the DLP projection system to color reproduction. Due to the projectors size there is no keystone correction so, it must be manually aligned square to the projection surface. There is a manual focus ring.

Pico projectors have made our life be more easier, and confortable, it has saved a lot of time and money. Now you can only need to take one or two hundred US dollars then you can buy a mini projetor, you may choose a best one as your requirement.
Reference: http://bestpicoprojectors.org/blog/

Do You Know Rear View Mirror Monitor?

Rear view mirror monitor is an awareness application that runs in vehicles, Solaris and HPUX environments.

Awareness applications are a class of collaboration tools that permit geographically distributed workers to maintain a level of awareness of each other that would normally be obtainable only through co-location. Specifically, when allowed by you and by your co-workers. A rearview mirror is a powerful way to know whether a given co-worker is at his or her table, on site but away from the table, or off site. These features of RVM are specific responses to information collected from Avaya employees showing that the time spent trying to locate co-workers represents a significant source of delay.

An important feature of car rear view mirror monitor is the persistent group chat which lets you conduct textual chat in real-time with groups of co-workers. Drivers will have the ability to set up their own groups, and may need to do so in order to have a place to post questions, disseminate information with co-workers, and even interact informally (e.g., set up a footy group). Because of the persistency of this feature, you can view the chat log for a preset number of hours after the messages were posted - invaluable in letting group members who log on later meet up with what has occured, and for viewing messages from co-workers in other time zones.

They hope that rear view mirror will allow users to have more exact awareness of distant co-workers presence and to be able to more effectively target their phone calls and their information conferences. This user guide represents an overview of mirror's features and directions on how to make full use of these features.

A rear view mirror (Called rear-vision mirror in British English) is a mirror in automobiles and other vehicles, designed to allow the driver to observe rearward through the vehicle's backlight (rear windscreen).

Usually, the rear view mirror is affixed to the top of the windscreen on a swivel mount allowing it to be freely rotated. Historically in the past, some cars had the rear view mirror mounted on top of the dashboard. Rear view mirror monitors are designed to break away to minimize injury to occupants who may be thrown against it in a collision.

Refer to: http://cobby2510.vox.com/library/post/how-to-select-and-install-car-rear-view-mirror.html

Buying Guides for Car Mp3

Purchase and installation of car Mp3 or Car MP3 audio converters, the purpose is to enjoy the music. If there is no good sound quality, using the car MP3 will waste a lot of time and money. In our opinion, believe that the basic audio quality depends on the following aspects:

(1) The sound quality of a car MP3
MP3 decoder chip used in itself is the key to good or bad depending on their quality. Decoder chip is the most high-end Philips's SAA7750, or Sigmatel's ordinary STMP3410, related to the internal circuit design, welding process, circuit board materials all create a great difference between different manufacturers products.
(2) The quality of music played files
The factors affecting the quality of audio is actually great. In turn depends on the quality of source music file formats and compression ratio. The most mainstream music format is of course MP3, wma formats, and today almost all MP3 players are compatible with both formats. MP3 users should be considered the most current digital audio format, lossy compression, we usually listen to the MP3 files are 128kbps bit compression rate, compression ratio is about 1:10, the file size to only 4M, in volume and sound quality to a top more balanced position. The songs we downloaded from the Internet are relatively low compression ratio, often only 96kbps or even less, are not always effective. This is the site for download speeds are copyright issues specifically to the practice of lower compression ratio. To enjoy the true sound quality, the best way is to find the quality of their better cd disc, their compression. In general, the compression ratio to 192kbps in the MP3 file, the sound quality was more of the good, MP3 player with a good player, effects, and md's have been very close, if compressed to 320kbps, then very close to cd quality machine, most people difficult to differentiate them.

(3) Quality of car MP3 / MP3 audio converter
Car MP3 audio converter to create personalized music listening system plays an important role. If the center frequency of instability in the audio converter, audio there will be noise; pre-emphasis circuit parameters do not match, the system will be affected the level of sound quality, can not reach the bass strong and powerful voices to restore the true, high-frequency wide area, up less than and please the ears of the standard.
(4) The quality of car FM stereo radio

Finally, the car FM stereo radio receiver and amplifier signal quality also can affect the sound of the overall system . Different brands and price of the car's audio system will have a big difference. As for a same car, you can use to receive local FM radio station to compare.

More car electronics refer to:http://blog.espow.com/car-accessories-happy-on-the-way/

Rear View Parking Sensor

Rear View Parking Sensor (DIY kit full screen Deluxe) for sale
Rear parking sensor - backtracked maneuver is smooth and easy. This complete DIY (do-it-yourself) kit comes with 4 sensors that use advanced technology ultrasonic detection to notify drivers of the exact distance between the back of their car and all obstacles.

Using high-tech ultrasound, this car park, overlooking the rear of the sensor accuracy of distance measurements in real time and automatically activates when in reverse. Also with a car backup camera, which "take pictures" for the obstacles and display the image on the monitor.
Both the direction and exact distance of all the obstacles are shown on the 2.5 inch display setting, which can easily be installed anywhere in the car. If this is not enough, the parking sensor also includes a car show 2D image and voice (or beep) alert which will increase in urgency and frequency as the car approaches a object, making sure the car is parked with perfect precision every time.

This quality rear parking sensor point of view is a easy DIY unit makes a great upgrade to any car. In addition to being snow, rain and hail-resistant, 4 high-tech sensors are also specifically detecting the obstacles. Connect it to integrate seamlessly into your rear bumper of the vehicle and can be installed on all cars and small great today without the need for any additional parts.
More refer to: http://espow.livejournal.com/46724.html

Built-in Projector

As we all know that projector has a tend to be mini projector. Now many cellphones have built in mini projector, On CES, HP has demonstrated micro mini projector, and it can be used with laptops.



But in the future, if you can put mini-projectors built into the notebook or tablet computer, would be a good idea to install the mini projector in the traditional position and to take place of the camera . In the past, will be in the notebook A surface. But we have not seen the laptop, from the existing technical point of view, should not have difficulty achieving the key is the projector projection parameters and resolution, In addition, If it is used for businessman, this will be very attractive and how do you think of it?

Let's take an example, if equippped the projector in the "A" side of the notebook, so it can be seen at home with a larger projector of Aiptek V10? And the laptop screen will not be too small to play games. You just need to project to the screen or the wall. Additionally, for a further idea, so whether lcd, led, oled screen will be not needed for projecting ? It would like to continue, the prospect is still quite attractive, do not know that if there is some manufacturers who will first launch the related product.

Buying guides for a mini projector: http://www.pixyard.com/_How_to_Buy_a_Mini_Projector

Tips of Mini Projector

Mini projector is widely used in different fields, such as business presentation, school training, company meeting, and any formal or informal occasion. With mini projector kids can project movies, video games at home or outside. Designed for different ages from eight or older, this moveable digital projector fits in the palm of your hand and projects a screen size of up to 60 inches! You may enjoy your favourite movies with your friends at home or when going outside for trip. With an optional battery pack, you will never lose sight of the massive picture!

Mini projector packs a punch that will bring presentations to life! The Atom easily provides 60 inch display resolution for a fun every time! You could hook up your game console, MP6 player, or portable DVD player to the atom projector and play your favorite movies or games on this big screen! Despite looks like a tank, atom projector is constructed from heavy gauge extruded aluminum for strength.


If you'll be able to plug it in, you can project it. It’s terribly simple! It's easy to make your own residence theater -- simply connect your favorite media player or game console to the Eyeclops' audio-video inputs (connector cables not included), turn on the ability, and aim the projector at a wall or ceiling. With engineered-in speakers and a projected screen size of up to 60 inches, your favorite movies and video games can take on a whole new look and sound!


Most of ultra mini projectors work with DVD players, video game consoles, handheld devices, and additional! Its straightforward, child-friendly features embody a pivoting arm for adjusting the projection angle, a volume management, and a focal adjustment. Not like different larger projectors, many mini projector like Aiptek V10 doesn't get hot, therefore it's also safe for youngsters to handle.
Mini Projector: http://cobby2510.vox.com/library/post/mini-projector-from-21-century.html

Three Kinds of Parking Sensor

As we all know, automotive parking sensor is playing an important role in our driving life.In the past, only some advanced cars have been installed with back up sensor when in factory, but now with the development of car electronics, market of reverse parking sensor has become diversified. Parking sensor is more and more popular and installed in all kinds of cars. And some car lovers even make "DIY" sensors to decorate their cars. This article maily will tell you two kinds of rear parking sensors.
Invisible Parking Sensor

There are so many LED parking sensors, it is also called invisible parking sensor, the function is same with wireless parking sensor, but the difference is that, the LED screen of this parking sensor will only display the distance of the obstacles behind the car, and drivers can only see the data of the distance, but he can not know very clearly about what is it behind his car. Those kind of parking sensor can also propt via the warning beeper, so that driver can control whether he could remove his car or not.

Visible Parking Sensor

This kind of parking sensor usually consists: a rear view mirror monitor, back up camera, and the parking sensors. The buzzer alarm will prompt drivers if the obstacles are near their car. This senosr is more advanced than other kinds of parking sensors, as cameras will be installed in the rear bumper of the car, and take the pictures of the obstacles, then the rear view mirror monitor can display the image of what the obstacle is. So drivers can know the condition behind the car very well.

Wireless Parking Sensor

Wireless parking systems can come with four to eight sensors. All sensors are installed at the rear of the vehicle in 4 sensors system. Two sensors are installed at the front and four at the rear, this is 6 sensors System. If sensors are evenly divided between the front and rear bumpers of the vehicle, which is eight-sensor systems. The front sensors engage when the driver starts the car and the rear sensors activate when the driver goes in reverse.

Wireless parking sensor will prompt the driver when the driver approaches the obstacles through audible, visual or both means. Some systems will display the distance when the obstacle is within four feet from the front of the vehicle or six feet from the rear. Some systems will start to emit a warning beep"buzz" when there is some obstacles behind the vehicle's front or rear is under two feet. When the vehicle is within a foot of the other object, some systems send out a continuous tone to alert the driver and some models will display the word "Stop."

More information concerning the car parking sensor, please refer to: http://visitkevin.wordpress.com/2010/08/02/how-to-choose-car-rear-view-system-products/

Differences Between LCD projector with DLP Projector

The mainstream market of mini projector at present is divided into DLP projectors and LCD projector projectors, CRT projectors have been eliminated, but most people do not understand too much about this two types of projectors, now we are analyzing the characteristics of two projectors.

DLP, Digital Light Porsessor digital light processor. The application of reflective DMD device, DLP projectors have a reflective edge in contrast and uniformity are very good, high-definition images, screen uniformity, color, sharpness, and image noise disappear, the picture quality is stable, accurate reproduction of digital images can be continuously and timeless. DLP projectors can be divided into: MCU, two machines, three machines. DMD digital signal red, green, blue order of rotation, a small mirror to the pixel position and color of the number of open or closed, then DLP can be seen as only one light source and a projection lens optical system consisting of a simple lens to enlarge a DMD reflection images projected on the screen directly, so a lively, bright display shows the effect will be in front of us.

As the general DLP projector with a DMD chip, the most obvious advantage is small size, the projector can be made very compact. Now on the market of 1.5 kilograms of mini projectors are DLP-type, most LCD projectors confidential more than 2.5 kg. Another advantage of DLP projectors is the contrast between the large smooth image. These advantages make it a home theater video world, the preferred species. Higher contrast, and now, most of the DLP projector can achieve 600:1 contrast ratio to 800:1 between the low price is also up to 450:1. LCD projector only 400:1 contrast ratio near the low price of only 250:1. The impact of a strong visual sense of the screen, no pixel structure of feeling, the image of nature. Another advantage of DLP projectors is grainy weak. In SVGA (800 × 600) resolution on the format, DLP projector LCD pixel structure than weak, as long as the relative visual distance and screen size of the projected image was the right tone, have not see the pixel structure. Long life, quality and good stability: reflective DMD chip technology makes relatively little energy absorption, and because the use of semiconductor devices, high temperature performance, long-term use after the screen does not appear significant deterioration.

LCD (Liquid Crystal Display) LCD projector, the projector can be divided into liquid crystal panels and liquid crystal light valve projector, the former is the projector market, the main products. LCD is the range between liquid and solid substances, in itself does not shine, the nature of much affected by temperature, its operating temperature of -55 ℃ ~ +77 ℃. LCD projector using the photoelectric effect, that is, alignment of LC molecules under the electric field changes, affecting its LCD Danyuan the transmittance or reflectance, thereby affecting its optical properties, resulting in a different gray level and color images. As the LCD projector better color reproduction, resolution up to SXGA standard, small size, light weight, very easy to bring up is the projector on the market mainstream. The number of pieces in accordance with LCD panels, LCD projectors are divided into three machines and SCM.

LCD projector in a metal halogen light sources or UHP (cold light source), issued a bright white light, through the optical system of the spectroscope, the white light is decomposed into RGB (red, green, blue) color of the light of three elements, RGB color of the light of three elements in precise position through the LCD, this time the role of each liquid crystal light valve is similar to the control of liquid crystal in each of the passage of light through the light or not and how much. Three elements of color light on the way, through the projector lens accurately projected onto the screen, what point is the color of the light intensity of the number of all distributions are just good. Thus, the composition of the projection screen in line with the source image colorful image. LCD projectors have a common color is good, the price advantage and brightness uniformity and good many advantages.

LCD projector obvious disadvantage is the performance of bad black levels, contrast is not very high. LCD projector performance of black, gray look is always the shadow part becomes dark and without detail. This is not suitable for a class of video movies, for the words to the DLP projector is not a big difference. The second drawback is the LCD projector hit the screen visible pixel structure, the audience is like watching the scene through the window lattice. SVGA (800 × 600) format LCD projector of atom projector, no matter how the screen image size, pixel grid can be clearly seen, unless the use of higher resolution products.

The Principle of Several Advanced Vehicle Configuration

1. Dimming rear view mirror

Dimming rear view mirror is usually installed in the compartment, it is by the side of a special mirror and two photodiodes and electronic controller, and electronic controller receiving photodiode sent after the shooting before the fire light and optical signals. If the exposure light irradiation in the car rear view mirror, such as the back light is greater than the previous lighting, electronic controller will output a voltage to the conductive layer. This conductive layer voltage electric mirror layer to change the color, the higher the voltage, electric layer deeper the color, then even if the re-exposure to strong light to the rear view mirror, reflected by the dimming inside rearview mirror to the driver's eyes shows the dark on light, not bright. Mirror reflection i11 electric layer to the rear light according to incident intensity, sustained changes automatically to prevent blinding. When the vehicle when reversing, the dimming function of rear view mirror monitor is to lift the car, right outside mirror auto-exposure ground.

2. Rainfall Sensor

Rain sensor hidden behind the front windshield, it falls on the glass under the water to adjust the size of the amount of windshield wiper action, thus greatly reducing the driver trouble. Rain sensor is not limited to a few wiper gear to transform the movement speed, but speed of movement of the wipers do steplessly. It has a light-emitting diodes known as LED infrared responsible for sending, when the glass surface is dry, the light is almost 100%% to be reflected back, So photodiode can receive a lot of reflected light. The more glass of water, the less light reflected back, resulting in faster wiper action.


3. Intelligent Tire

Intelligent tire that has the computer chip, or computer chip connected with the matrix, it can automatically monitor and adjust the tire temperature and air pressure drive to make it in different circumstances can keep the best state of motion, not only improves the safety factor also save costs. Estimated a few years of smart tire can detect changes in road surface after wet tire tread to prevent slipping.

Humanity Driving in Rain

Driving in rain is a headache, because by the rain of rainy days, it has increased the difficulties for driving. Combined with rainy days, air humidity, particularly large, so it is easy to form a mist in the rear view mirror on the impact of our vision, the previous high-end cars increased by a mirror electric heating function to eliminate the mirror mist, and now some of the tens of thousands of travel models also have this feature, give you about several following
car with this feature.

GREAT WALL CUV M2 Greatwall COOLBEAR
Equipped models: the whole system standard

Open electric heating method: air-conditioning and double-flash button in the middle, and back windshield defrosting a key design

Hover the mirror M2 and the cool bear exactly the same heating function, as did Harvard M2 is cool bear CROSS models, so we get these two cars together for everyone to recommend. From the exterior view, and Cool Hover M2 bear roughly the same shape, but Harvard M2 body size compared with the cool little bear is magnified, Harvard M2, length / width / height were 4011mm/1744mm/1720mm, and Cool Bear was 3968mm/1695mm/1634mm.

Bear with the cool front that shape creative than a lot of Harvard M2 to convergence. The facial shape has been redesigned to give up the cool concept cars that bear-like style, size, location marked by larger headlamps, the cool bear on the "Dan Fengyan" was replaced by two huge headlights.

Great Wall CUV M2 in addition to new seats and door panel material and color aside, the two cars exactly the same overall style interior trim, black interior with silver trim strip of the match for the younger set the overall tone. All over the car's storage space can accommodate, including cell phones, wallet, keys, cigarettes, water bottles and other items scattered on you all, in functionality and use exactly the same with the cool bear.

Under normal circumstances, the trunk volume of the two vehicles 600L, when necessary, the rear seats can be 4 / 6 ratio were brought down, all down to the ground in the back seat, its volume can reach the 2426L, the feeling like a small house. Great Wall, the two vehicles are equipped with self-developed GW4G15 1.5VVT aluminum engine, maximum power of 77kw, the maximum torque 138N.m. CVT version also provides a low-speed mode and simulate snow manual mode. Both cars though personality, although useful, but this small MPV to be widely accepted by Chinese people also need a process.

What Need to Consider Before Buying Projectors

Remote control, using radio frequency (RF) remote control to meet your interaction with Aiptek V10 , the maximum effective distance of 50 feet. Is the best configuration for a large conference room or ceiling projector configuration.

Infrared (IR) devices using infrared signals. And the effective distance between the projector is less than 25 feet. Including mouse control and laser pointer remote control for presentations to help. Multi-function remote control provides amplification, signal source control and keystone correction feature provides the user convenient setting.

HDTV capability enables the projector to have good ability of home theater applications.
Fan tone noise is when you use the projector in a small room and do not want to be disturbed by the fan noise, you must be consider when discussing the issue.Variety of connectivity is the main characteristics of the signal sources. Make sure the projector is from different acceptable forms of video and PC inputs, you will meet a variety of devices connected to the projector. You need to understand how the projector will be used, and the need to connect to what kind of device.

Lamp life is your projector bulbs and effective working time, until the light can not achieve its rated brightness of the light intensity (typically less than 50% of original brightness). Some of the projector set up to provide economic model to reduce the brightness of bulbs to extend lamp life. When you do not need full brightness, the function is very useful. Longer lamp life, the longer time between light bulb replacement, thereby reducing the total cost of ownership.

Carrying case when traveling can be very easy to use. Offers a variety of design products. If you travel frequently, then through the hard shell carrying case drop test is the most suitable. Soft-shell carrying case may cause equipment in the aircraft's luggage was damaged. Carrying case with wheels can be installed simultaneously on your notebook without the equipment back in your shoulders.

Warranty service depending on the manufacturer. You need to send the mini projector to the after service. Also you need to to pay. Demanding business applications is not recommended to use projectors service. Advanced replacement service, the manufacturer of faulty equipment will send the replacement when received the fault mini projector.

Reversing Radar Maintenance

First, the test quality. Conducted in accordance with product instructions from the test, that is, take a look at the description when the obstacles mentioned in the various regions, the radar response is consistent with the description, the radar is sensitive to such issues as whether the false positive; and then check the test of waterproof, which whether the parking sensor kits can work in humid weather, the probe may be damaged in the rainstorm affected by the accuracy.

Second, pay attention to when purchasing the texture and color of the probe should be unified with the original car. This will not affect the overall results. Now the installation method of probe is to use more "embedded" (ie, drill a few holes in the bumper), this can easily fixed, it seems, and more beautiful. What should be noted is that, different probes have different in size and detection angle, and the punch size (each product has its own dedicated Zhong metal hole puncher)and the installation angle will directly affect the accuracy of detection, therefore, installation must be decorated to the professional car care center.

Third, garage parking sensor can be installed after purchase on their own, can also decorate the shop in the "buy and install in one."

At last, pay attention to cleaning and maintenance. Probe should always be cleaned and there will definitely affect the accuracy of probe if ther is some attachments. Some people hope to probe "painting" method to keep the unity of the whole car color, that is all wet, the truth is self-evident. If the probe is clean and there is still some false warning or "not reporting" occurred, it maybe because the probe is damaged or the electronic line is broken, so you need to have it repaired or replaced.

How to Install Wireless Car Rearview Systemi

Wireless Car Rearview System is easy to install, easy to wire. It is economical and practical, and currently widely used.

Install wireless reversing video system, follow these steps:
1, Remove the license plate.
2, Remove the trunk floor.
3, Open the license plate light cover.
4, The camera power cable from the vehicle license plate light penetration hole, and fixed-line.
5, The camera fixed on the plate rack.
6, The camera negative relationship between the power line is received by reversing the power on lights.
7, Restore the rear of the demolition of parts.
8, Connect the display power supply into the cigarette lighter, replce well of the display.
9, Start the car, hanging reverse files, then display the reverse image.

Special Reminder:
1, In the camera when the power cord through the tail covered with small wire pulling more root system. That would be more favoring.
2 After installation, please note that check in the parking camera and check whether the luminous light is turned on, and if that does not turn so it is the power is not connected.
3, shall be able to launch panel on the front of the leading car parts. Can not be placed on the back cover of the steel sandwich in the car, it might as steel barrier will affect the camera and the display is installed after the non-poor signals or images.

A Talking Parking Sensor

Recently, a "talking" of the parking sensor was appeared on market in Beijing. According to reports, this reverse sensor detection by the host and a four-wide angle ultrasonic probe composition, close to the barrier to provide simulation of voice prompts, to help "newcomers" auxiliary reversing safety devices.

Usually, people are reversing to determine by visual observation of the distance between car and obstacles.
But for a new driver, the sense of space is poorer than skillful drivers. Driving longer, wider car, the distance can not be accurately judged by a new driver; Reversing at night is more vulnerable to dark solar films and effects of light, then hit the railing, stairs, trees and other obstacles .

Installing a "talking" automotive parking sensor , the one hung up reverse gear, there will be voice prompts accurately the distance between vehicles and obstacles, to help drivers to eliminate blind eye. Because "talking", reversing off the radar information provided by the driver's attention, the driver can concentrate on the car, then make reverse be more safe.

In addition to voice prompts, the "talking" parking sensor also offers LCD (liquid crystal display). When the voice prompt is not needed, drivers can turn off the volume, relying on information provided from the LCD display to reverse.

Reverse Parking Sensor Evaluation

While each vehicle has a rear view mirror, but inevitably, after all, as there is a blind spot. To compensate for this deficiency, the installation of parking sensor may be the new owners' choice.

Then many reversing radar what the market performance? Whether the newcomers can solve the trouble reversing? New Express vehicle testing in heart has been installed on board on a number of car parking sensor during the actual measurement.

Parking sensor works

Major role in reversing radar when in reverse, using ultrasonic principle, by the device on the rear bumper send ultrasonic probe on the impact. After the reflection of this wave probe obstacles to calculate the body and the actual distance between the obstacle and then prompted for the driver to stop and reverse easier and safer. Tips for reversing radar can be divided into liquid crystal, three kinds of language and sound; to receive a wireless transmission means and cable transmission and so on.

Parking sensor is a safe vehicle parking assist device, to lift the drivers start parking and vehicle access around before and after the trouble caused, and to help the driver to remove the dead zone and blurred vision defects, improve driving safety.


Test 1

Parking sensor Brand: Rail general probe: 4

Warning prompt by: Sound + mirrors digital distance display

Installation of vehicle: Passat

Warning from the test: we first tested with an ice cream bucket and found the car parking sensor simply undetectable! Until the ice cream barrel accumulate to the height of 50 cm can be tested. The reversing radar obstacle distance display accuracy of 10 cm. Measured in barrels of ice cream for the longest detection range of 120 cm, reversing radar display at this time distance of 130 cm. The most important proximal. Distance of 40 cm were tested and the results are still accurate. But when the ice cream barrel less than 40 cm away from the rear, the parking sensor display from "0." That is the smallest of the reversing radar detection range of 40 cm.

Obstacle azimuth display test: the reversing radar only shows the left or right barrier.

Detect dead test: When the top ice cream bucket center deviation 8 cm above the probe center, the probe can not find the existence of the ice cream bucket! Also issue of sensor means of ultrasonic sound beam is narrow, cone obstacle detection on the tube there are more dead.

Conclusion: Reversing Radar 50 cm below the height of obstacles in the "blind eye" to detect acoustic beam is too narrow, when the obstacle departure from exploration. When the head is on the point of view, there is a big blind spot detection, obstacle detection cone of the tube there are more bind spots.

Test 2

Parking sensor Brand: All safety probe: 4

Warning prompt by: Sound + Digital Display + direction from light to indicate

Warning from the test: the reversing radar obstacle distance display accuracy of 1 cm. Measured in barrels of ice cream vehicle farthest with a detection range of 140 cm, reversing radar display at this time distance of 154 cm. The most important proximal test, we were at 50 cm, 47 cm, 40 cm and 35 cm for distance test, the results are very accurate. However, when ice cream barrels less than 35 cm away from the rear, the parking sensor display from "0." That is the smallest of the reversing radar detection range is 35 cm.

Obstacle azimuth display test: the reversing radar can accurately displayed.

Detect dead test: When the top ice cream bucket center 6 cm above deviate from the probe centers, the probe can not find the existence of ice-cream bucket! That is the issue of sensor ultrasonic beam is narrow, cone obstacle detection on the tube there are more dead ends.

Conclusion: The safety of this reverse sensor, proximal more accurate detection range, obstacle detection and accurate location. However, acoustic detection beam is too narrow,

When the obstacle is on the point of departure from the probe when there is a big blind spot detection, obstacle detection cone of the tube there are more dead ends.

Types of Projector

According to the application of the projector environment categories, they can be divided into the following five categories:

Home Theater Type: mainly optimized for video aspects, characterized by brightness of 1000 lumens or so, high contrast, multi-projection screen 16:9 aspect ratio, a variety of video port range, suitable for playing movies and high definition TV, suitable for home users. Some home users use the mini projector to watch films at home.

Portable Business Type: General to less than 2 kg weight is defined as the business projector portable projector, this weight comparable with the thin and light notebooks. Business advantages of portable projectors are small, light weight, mobile and strong, is a traditional slide projector and medium-sized alternative to thin and light notebooks with business with portable projector is conducting mobile business users the first choice for mobile business presentations with time.

Education Meeting type: General located in schools and enterprise applications, using mainstream resolution, brightness in about 2000-3000 lumens, moderate weight, heat and dust to do better, for the installation and short distances, feature rich interfaces, easy to maintain, cost performance is relatively high for bulk purchases of universal access.

Mainstream project type: compared to the mainstream in terms of ordinary projector, projection projector projects a larger, more distant, high brightness, and generally also supports multi-lamp mode, to better cope with large-scale installation of variable environment, for education, media and government are the areas of application.

Professional Theatre Type: This type of projector pays more attention to stability, stressed the low failure rate, the thermal performance, networking capabilities, ease of use has done so very strong. Of course, in order to adapt to a variety of professional applications, the most important features of the projector works, or its high brightness, the brightness of 5,000 lumens or more generally up to as high as 10,000 lumens can be super. Atom projector is more easy to carry. As the large volume and weight, are often used in special purposes, such as theaters, museums, town halls, public areas, can also be used to monitor the traffic, public security command center, fire and air traffic control center environment.

Reversing Radar Sensor

Concerning parking sensor kit, then it is related to the ultrasonic probe. The ranging advantage lies in its convenience for quick, simple calculation, easy to do real-time control. Parkin sensor is a non-contact detection and measurement precision, can be achieved in the practical requirements of industry. Take it as an example: In order to mobile robots to automatically avoid obstacles walking distance, measurement system must be equipped to make timely access to information on the distance from the obstacle. Also can be used for reversing radar, topographic mapping, construction of houses, bridges, roads, excavation of mines, oil wells.


Reversing radar sensor: In order to study and learn how to use ultrasound, it has been designed and produced a number of ultrasonic generator. Ultrasound probe, the use of sensor, generally speaking, the ultrasonic probe can be made into two categories: one is to use electrical methods generated ultrasound, another is mechanically generated ultrasound. Now the piezoelectric ultrasonic generator is more commonly used. It consists the two piezoelectric chip and a resonance plate.

When it's poles plus pulse signal, whose frequency is equal to the piezoelectric wafer. The natural oscillation frequency, the piezoelectric resonance will occur, and drive plate vibration resonance, ultrasound arises. On the contrary, if there is no applied voltage between two electrodes, it will be pressure for piezoelectric vibration when the board receives the ultrasonic resonance. The mechanical energy is converted to electrical signals, then it becomes an ultrasonic probe.
Reversing Radar Ranging: Parking sensor ultrasonic probe will emitting signal in a given time. Experiencing the measured object and then reflected back by reversing radar received. As long as the calculated ultrasonic signal received from the launch to the echo time, we can calculate the distance from the measured object, and get the propagation speed in the medium : Backup sensor probe can bring shell and line .Also can age the sensors by the high and low temperature, then the performance will be stability. Diameter size from 10mm to 22mm variety, generally based on various types of specifications to design the probe.

Rear View Camera Tips

Car rear view camera, has been widely used in various vehicles. But how to select a good car rear view camera? Maybe for customers, probably it is a little difficult. Because of varying products on the market today, and the products are vague, but whatever it takes, you can examine the the performance of car rear view camera from the following tips.


1. From the chip. (because it is the core chip of a rear view camera. It is not produced by domestic manufacturers. There are mainly two kinds of chips: CCD and CMOS. CCD manufacturers: like SHARP, SONY. CMOS manufacturers: OV , PIXEL, Micron. (Different chips, different price )

CCD and CMOS chips are the key part of the car rear view camera. According to different components,they can be divided into CCD and CMOS. CMOS is mainly used in products which do not require a high quality iamge, The advantage is that the manufacturing cost are less than CCD. and power consumption is also lower than the CCD, disadvantage of CMOS cameras is that CMOS demanding on the light source; CCD, is widely used in photography, camera's high-end technology component also comes with a video capture card. CCD and CMOS large gap between the technical and performance. In general, the image effection of CCD is better than CMOS. However the prices are much more expensive. it is suggested that consider to select the CCD camera without the affordability of the cost.

2. clarity
Clarity is an important indicator to judge the camera is good or not. In general, The quality of a high-definition image will be better. TV lines min: CCD is 420 TV lines, CMOS is 380 TV lines. For the present definition in the 420 line of products has become a mainstream products in reversing camera. 380 lines can also be good if it is can be debugging. However, according to various different camera chip level, different photosensitive elements, including the commissioning technician level, the same chip, the product may show the same level of quality of results will come out different.On the contrary, There will be some discount for the high-definition night vision products.
3. night vision
Night vision is in connection with the definition. The higher definition products of night vision are not better. This is because the chip. But a good quality product always with night vision capabilities, and it will not influence the quality of the image of obstacles. Although the color would be a little bad, but the clearness will not be a problem.

4. Water-Proof
The same chip, manufactured by different factories, performance of waterproof is different, so also it is the key for a customer who need to pay attention to. Once the function of waterproof is bad, the rear view camera would be non-water-tight.

5. Interface
At present the commonly used interfaces are: RCA, BNC, air plug, there is a small part of the S terminal. The most professional aviation plugs (set of power, ground, signal one), the shock resistance, anti-interference ability, bending. Concerning the install structures, other interfaces can not be compared, it is also the preferred products for the depot.

All in all,Select car rear view camera from the above-mentioned tips, the most important is to observe the chips and the function of waterproof. Of course the most important is to look at the actual image displayed by the back up monitor.

Protect Your Vehicle with Car Camera

Have you ever thought of to ensure the safety of your car and fit a camera in your car? If not, you really should be considering the safety of your car. Car camera can help protect against theft and damage ofyour valuable vehicles. Vehicle crime is a serious problem, at present, with the car stolen or destroyed, millions of this events occured every year.

Some car drivers from the joy of driving to the ground and dumping PV Puma let you pick up the confusion. Other professionals resprayed by credit card, shipped to another country. In other cases, the vandals can cut your tires, your car spray paint graffiti, or just a crowbar attack it. In both cases, the installation of putting a spy camera in the car can remind you of the theft and provide evidence to catch the perpetrators.

You may have a spy camera installed in your car. It allows you to monitor and record any activities, and around the Puma store your vehicle, you can remind you of any attempt to steal or damage it. Another option is to install a camera to track your car with the tiny Global Positioning System equipment. With this combination, you can keep your vehicle anywhere on the label.

You are only in your car for the location of your car hidden camera. It then wirelessly transmit a feed no matter what you choose and / or record all the Puma outlet in the memory card or digital recording equipment in your vehicle location.

So, 'the best place to hide in your car of a camera. Popular choice is rear view mirror, dashboard and rear seat cushion.

One of the simplest type is the rear view mirror monitor . You just clip to your rearview mirror, it monitors your entire car interior. These can be rotated to provide both internal and external need to see your car. This camera is very small and light. You can just paste it into your dashboard model. These from your lighter socket and record to memory card power. 2 Gigabyte SD card, for example, can store up to 8 hours of video.

Another complex feature is a motion sensor camera. These are used in automobile sales Puma shoes, because they are only a sound recording, some motion detection in the camera's view. This type of camera is a great energy saving device. It sat quietly with minimal power, but as long as it senses that its campaign, which began recording and / or transmission. Puma Sales

Other options include automotive night vision camera. These are very useful, many thefts and attacks at night.