LED solid state light source projection of various types are emerging

Using LED solid-state light source of the projector can be referred to as LED projector. In addition to the use of mobile projection alone, but also includes some of the pre cast household, commercial front projection and household rear projection, even if the former home investment, commercial and domestic investment in front projection accounted for a small share, but also a considerable sales. It is estimated that the LED projection market size in 2006 will reach hundreds of thousands of units in 2007 will be more than one million units.

Show attractive development prospects of LED projection generally consists of three categories of products: the first category is the mobile projector, the DC power supply, can be used alone or in combination for other mobile devices in the image information; the second type is called a portable projector, used in household and commercial before the vote before the vote, the size ratio of mobile projector, some products can be delivered DC power supply, used alone, the first and the two is the first projector; third is the back of the projector, including rear projection TVs and rear projection display, the AC power supply, used alone.

The second category, the third category is UHP (ultra high pressure gas discharge lamp) projection of the traditional advantages of products, and the first class of products is currently unique to the LED projection, is a new type of projection products.

Compared with the UHP projection lamp, LED light solid projection has a series of attractive advantages including long service life, range of color reproduction, high light utilization efficiency, low power consumption, easy for miniaturization, lightweight and low cost etc..

May 2003 held in Baltimore, the international SID (information display Society) annual meeting, there is a pocket LED light source projector prototype. Personal projection for the first time to become a hot topic of the show, then it was predicted that the small personal projection will change the consumer electronics world. Since then, the LED projection continues to appear in the relevant exhibition, and sometimes become a topic of the seminar.

January 2005 Las Vegas CES exhibition called LED projection in the process of development of the watershed, there are 5 companies on the display pocket LED projector, most of the prototype, there is a marked price of the product. Most of the exhibits are battery powered, with a luminous flux of 20lm-30lm and a bright 20 inch screen. The exhibition also has two rear projection using LED light source, said the projection engine output 80lm-100lm, 34 inch rear projection screen brightness of more than 100cd/m2, while the rear projection screen of 50 inches darker. There are several companies have exhibited the use of LED backlight LCD tv. In the CES show, before the vote, rear projection and LCD TV debut, together with force, together with LED as a passive light-emitting display lighting source of attractive prospects for development.

Lumen efficiency need to be greatly improved LED projection light source lamp have solid technical and economic performance advantages to the LED projection, but compared with the UHP projection, LED projection also has three shortcomings: one is obvious LED light source light output is greatly improved; two is the projection light source and projection engine design maturity is not high; three the market perception has just begun.

Improving the efficiency of LED is the precondition to solve all the problems of LED projection.

In the 30 years before 2002, the lumen efficiency of LED or the efficiency of electro optic conversion increased by an average of about 2 times every 3 years, and this growth trend can be maintained for another 10 years.

The driving force of the rapid increase of LED lumen efficiency is the basic national policy of energy saving in all industrial countries, and the demand comes from the larger market of non projection light source, such as automobile lamp, traffic signal lamp.

It is predicted that in 2006 -2007, LED lights and UHP lights will have a considerable lumen efficiency. Since then, the growth of LED lamp efficiency is still very large, it is possible to reach 120lm/W in 2010, reached 150lm/W in 2012, while the UHP display for micro projection efficiency can only be 70lm/W-80lm/W.

Due to the exact technical reasons, it can not be considered that the LED projection lamp will be in a few years to reach the level of the UHP projection lamp light output, it should not be considered a few years after the LED projection will replace the UHP projection. Projection lamp from halogen lamp to metal halide lamp, to the middle of the last century after the mid 90s, UHP lamps gradually replace the metal halide lamp, the mainstream of the century before the cast and micro display rear projection have been using UHP lights.

From the beginning of 2005, in the relatively small size of the display area, LED projection will challenge the UHP projection, the two will enter the complementary coexistence stage of development.

Construction of LED projection industry chain China has become the world's largest TV and display manufacturing base, but also an important manufacturing base for new consumer mobile digital products. Ministry of information industry and industry associations have always supported the formation of the industry chain, many companies are also very important to the development of the industry chain and industry.

Currently, the display device accounted for the cost of flat-panel TVs 60%-70%, but there is no technology and production capacity of Chinese enterprises, industrial chain construction is more difficult.

In the LED projection industry chain, the need to import the image display devices account for only about 10% of the cost.

In addition to supporting parts, the recent domestic have the possibility to solve, to carry out technological innovation and access to independent intellectual property rights of a large space.