The new trend of LED technology has brought revolutionary projection projection

At present, liquid crystal projector usually adopts three chip design. Under this condition, not only the high density liquid crystal chip is high in cost, but also the structure of the optical device which ensures the coincidence of the three liquid crystal images is also very precise. This sophisticated optical system is the reason for the high price of 3LCD projector. Monolithic DLP projector imaging device although only a low cost, some more than three type liquid crystal to, but it needs three color light source alternately, which requires special color wheel and color wheel drive motor and synchronous control circuit for instantaneous color separation of ordinary white light. The precision of the system is the DLP projector color wheel rotating high price. So, whether it is LCD, or DLP projector, their prices are high.

However, with the invention of the three color high brightness LED light-emitting diode, this system components because of a wide range of high price and become a barrier to universal projector has been broken...... LED light source projector in the list of "2005 CES" exhibition in the United States this year, MITSUBISHI released a mini projector using DLP technology, the projector does not use the AC power supply, power supply with battery weight only about 397 grams. Able to quickly start the power, with more than 10 years of use can be 20000 hours of high brightness LED semiconductor light-emitting diodes. It is reported that the projector is expected to sell for $699, the standby battery price of about $199. According to the company, the pocket projector using LED light source, without the use of a color wheel, but by using high-speed switching of red green and blue color image, showing the way, realizes the miniaturization design. Brightness reached 250lux, size 123x47x97mm, resolution of SVGA (800*600). Weight 400g, only the size of the palm, completely small compact design. In the demonstration, in the dimly lit booth on the front of the projector about 1m to about 40 to 50 inches of DVD images. Resolution of 800 x 600 pixels.

Figure 1: the concept of a super portable DLP projector produced by Mitsubishi Co is much less than the palm of the hand

Figure 2: another Mitsubishi Co produced ultra portable DLP projector and mobile phone together for size comparison, using high brightness LED as light source

In the United States this year, "2005 CES" exhibition, InFocus Corporation (InFocus) demonstrated the use of high brightness LED light emitting diode for the light source of the pocket DLP projector, its smaller size. Open up a fresh outlook is: because the power consumption is only 17W, can actually use the internal battery as the power supply, so as to completely remove the power line tail, and become the real "portable" products.

(Figure 3: ultra portable DLP InFocus projector, using high brightness LED as the light source.)