The three issue to help you buying projector

1, select LCD or DLP

When you buy, the salesperson will ask you is to choose the LCD projector or DLP projector? At this point you may be up a gum tree? In the end choose a good? Which are good? In fact, both in the home have their own advantages in the projector; DLP is a new projection technology, LCD projection technology tradition. Compare old and new technology, of course, new technology slightly better than the old technology, as "a chip" on the performance in a compact and portable, true and accurate image reproduction, image layering is good, excellent black effect. Of course, the traditional LCD projector technology is relatively mature, with high light efficiency, beautiful color, saturation and good technical superiority can not be replaced. However, to remind the user one, in the same resolution, DLP technology, the projector's LCD technology, the price is almost double.
2, the brightness and contrast

many friends have asked to buy the projector, is not the brightness as high as possible? In actual fact, if you are buying business machines, of course, the higher the brightness the better, because the business use of the environment area, and strong light, which is not the same with the home environment. For individual users, too bright is not necessarily a good thing. Because individual users of the use of the area is much smaller, better interior shading, projection screen is too bright, but people feel dazzling, and even eye damage. The general area of home users use of the environment, if 20 to 50 square meters, the general brightness of the projector home at 800 lumens to 1200 lumens or so. On the contrast, that is, the higher the better. The higher contrast, sharper images eye-catching, bright vivid colors, details to show good results. Performance in contrast, DLP has the advantage over LCD.

3, resolution and aspect ratio

Buy home projectors, of course, is to buy affordable and models, so be sure to know what kind of parameters linked with the price. Following the resolution just like we said the price of the projector has a great relationship, the higher the resolution, the clearer the image projector, of course, the higher the price. From a long-term perspective, if economic conditions permit, it is best to buy the physical resolution XGA projector, which displays the effect is clearer, bright. But for the home, the current SVGA projector can meet the needs of most people. Is worth a reminder to purchase the projector, be sure to distinguish between the good standard resolution and maximum resolution, standard resolution is the normal display output when the projector resolution, while the maximum resolution supported is outside the projector maximum resolution of the device, meaning that if the purchase of a maximum resolution of 1024 × 768, while the true resolution of 800 × 600 projector, the picture of the show is 800 × 600.

In addition, the projector when you buy be sure to ask, the real projection projector or a 16:9 ratio is 4:3, and now most of the DVD film source is a "variable-type wide-screen 16:9" mode, followed by HD standard 16:9 aspect ratio television screen, home projector or a 16:9 ratio will be the trend with the development. With the micro projector features become more perfect, but also into more and more families.

Specifications and main technical about mini projectors

1. Technical Specifications
a). Dimensions
b). Optical efficiency: Unit power consumption (per watt) to the output of the luminous flux (lumens)
The index is an indicator of micro-projection is very important, as an ordinary projector, because supply is very important for the general brightness indicators, micro-projectors, both due to the brightness, battery life, heat and so on system problems, and therefore not simple brightness and the luminous efficiency will be as key indicators.
c). Resolution: The resolution of chips, such as VGA (640 * 480), QVGA (320 * 240) and so on.
d). color purity: color performance indicators, often internationally to measure the scope of NTSC color gamut
e). Contrast: easy to measure the image resolution indicator (a simple definition of state of dark state light display ratio)

2. DLP technology
As a Pocket Projector (mini-projector) of the main promoters, TI handheld projector in (pico-projector), also under the foot of the intensity, since 2008, the latest DLP also introduced its latest generation of the DMD chip.
Currently, in the world, only Texas Instruments (TI) DMD chip can provide the commercialization of products, mainly through the principle of the micro-mirror control to light to switch to achieve the right color scale and gray scale of that in the small DMD chip, with nearly 1 million than a human hair fine type of small mirrors.

3. LCoS Technology
DLP technology from TI with a company than monopoly, LCoS chip business, relatively speaking, more and more, such as Himax, Displaytech (Micron), Syndiant so. In addition, DLP LCoS technology platform open than many, relatively speaking, a greater development potential. LCoS technology as its main imaging principle similar to liquid crystal LCD, is controlled by micro-circuit voltage to liquid crystal torsion, polarized light through the LCD on the control, hitting the light to switch to achieve the color scale and gray scale. LCoS (Liquid Crystal on Silicon) and the LCD itself is different in that its reflectivity for light control, and LCD is the transmission of light control, so in theory LCoS technology itself from the opening rate would more than LCD.
As the LCoS technology, began to develop from 2008 to the present, there are the original color filter type (Color Filter) development for the current color sequence type (Color Sequential), its color performance and light use efficiency have been significantly improved current Sequential Color LCoS has become a mainstream technology.
Speaking LCoS technology and had to refer to the 3M Company, as the world's first release 3M, the optical engine is also a Fortune 500 company, its corporate culture is known for innovation in display technology field, from the projector Faming to the 2008 launch of the world's first optical engine, 3M Company has also become a big banner LCoS technology. In addition, 3M, liquid crystal polarization control in long-term technological leadership, which itself control the development of a polarization film, the film made use of PBS (Polarizing Beam Splitter) Polarization-controlled optical components, can make the same performance The LCoS light engine more than 30% volume reduction, process complexity greatly reduced, in addition, compared with the general LCoS light engine, can also contrast sharply.

Are pico projectors the next big cellphone trend?

While commercial products with so-called pico projectors are still relatively rare, Microvision and rivals such as Texas Instruments Inc and 3M Co were promising strong prospects for pico at the Las Vegas show which ends on Sunday.

Microvision showed off a stand-alone projector that looked like a big bar of soap and projected crisp video images using laser technology. Its big hope is to embed the technology in a range of consumer electronics including cameras and phones.

"My feeling is that ultimately the phone is the largest opportunity," Microvision's director of communications Matt Nichols said, adding that his company was talking to dozens of potential customers including phone makers.

Nichols sees the first prototypes of gadgets with embedded Microvision pico projectors later this year, and expects the first commercial products some time next year.

After that, he expects the market to explode -- in the same way that cameras have quickly become a must-have component in cellphones.

"We believe that in a five-year forecast, your phones will all have projectors," Nichols told Reuters.

Texas Instruments, a major supplier of application chips for phones, has its pico projectors embedded in several commercial devices including dedicated mini-projectors and two phones from Samsung Electronics Co Ltd, the latest of which was demonstrated at CES.

"Everybody is just completely jazzed about" pico projectors, said Frank Moizio, manager for Texas Instruments' pico business. "I don't know what that translates into in volume. We hope it will be high."

Since phones already have so many bells and whistles, such as multitouch screens, cameras and music and video players, some analysts question how much room there is to add more components.

But Ovum's Jonathan Yarmis says pico technology has a huge potential because it solves the problem of video viewing on tiny cellphone screens.

"When you liberate the display from the device, you've the opportunity to make the experience more immersive," the analyst said when asked about the next big cellphone trends.

Others like wireless industry consultant Cheetan Sharma see the mini-projectors turning up in cameras, allowing photographers to share snapshots, before becoming popular in cellphones.

"I think the camera is the first thing and then of course it will migrate to smartphones," Sharma said, adding that electronics makers also expect demand for pico projectors in laptops for business travelers. "Some people are looking to integrate it into a laptop so they can do presentations."

Article resource: http://www.reuters.com/article/idUSTRE6091TO20100110

A Peak Into the History of Projectors

Projector has been since the mid-1600s, the use. History is not clear who could have been the actual inventor of the projector. A highly educated Jesuit scholar, Athansius Kircher description and instructions to reflect sunlight from the mirror device, through the lens and screen, he was known as the magic lantern. In recording his thoughts, he credited with the invention. These days look like a magic lamp and kerosene as fuel slide. The slide is large and bulky items, some of which pulleys and winches animated version of the production of crude oil.

Michael Faraday in the 19th century burning of oxygen, hydrogen flame heating, and gave a brilliant lime block. This caused concern and 'pushy' lot was born. Near the main source of lighting, domestic all the lanterns. To the remarkable 19th century technology is advanced enough to try hand at the theater. It is so powerful, it gives the look of high noon. Lens and filters are used to create the effect. Striking is the standard projection of light until the late 1800s, when the electric lighting system arrived.

Projector technology improved the same time. This is the entry 'little better' with. It is the dawn of the computer and projector to be stored. With the new business practices of the 20th century, the day after 50 years call. A projection is small, easy to use, reliable, and create clear images of any size can be bright in any room in any light. The call is answered multimedia projector. Principles apply to digital projectors and digital light processing (DLP) was born. In the House before the better known and rising to the challenge of projector manufacturers.

In 1996, SVGA projector using DLP technology, the production of digital images accurately with the development of high brightness. This is the incorporation of built-in sound system. This produced a modern LCD projector. Projectors have become increasingly sophisticated and more expensive. An LCD projector the basic design is frequently used by the amateurs who build their own DIY projection system. LCD projector success, because this is to improve the contrast reached the level of DLP in addition to the dynamic iris back in 2004-05.

In the latest mini projector to ease travel salesman medium-sized projector. Another development is the laser projector. Laser projection technology means that the focus of prediction. This means that there is no need to fiddle with the focus wheel get a picture. There is no need to re-adjust each projector moves closer to or away from the screen. This can focus the laser on uneven surfaces projector. You can easily projected onto the surface areas and other. Projector is the smallest laser projector. They fit in your pocket with your cell phone. Like Aiptek V10 is one of today's best products.