DLP rear projection technology

DLP (DigitalLightProcessing) refers to the digital light processing technology, which we first video signals through digital processing, then projected , the projection display good quality. Transmissive Tsingtek graphic lcd display module projection and imaging different , DLP is a reflective way . Its kernel is TI ( Texas Instruments ) has developed a digital micromirror device -DMD (DigitalMicromirrorDevice), DMD is the final part of the visual display of digital information , which is the standard CMOS semiconductor process , coupled with a tunable reflection formed on the surface of the rotating mechanism device . Typically , about 1.3 million DMD chip installed hinged micromirrors , a micro-mirror corresponds to one pixel. The principle is to use a rear projection DLP integrator (Integrator) homogenizing the light , the three primary colors through a color wheel (ColorWheel), separating the light into R, G, B three- color light source is inclined to the mirror , the reflected light to the lens , equivalent to the optical switch "ON " state. When the mirror tilt to the light source in the opposite direction , the reflected light is less than the lens , equivalent to the optical switch "off " state. The gray level of each second optical switches , switching frequency ratio determined . Therefore, the use of synchronous signal method for processing digital signals lens rotation , continuous light into gray , with R, G, B three colors and the color shown, the final projection imaging , we can produce high -quality, high-ash grade images.

Currently there are DLP projector DMD chip machine, two-piece and three DMD DMD machine machine . According to their different characteristics , with different applications. Which is mainly used in portable monolithic projection products , two-piece used in large tiled display wall and three type is mainly used in high brightness projector. DLP rear projection TVs generally have 4-5 times more common definition TV , and has the advantages of high brightness, high contrast ratio , 1000:1 contrast ratio can be achieved . In addition , the use of digital technology, improve the image gradation , image noise disappears , the picture quality is more stable. However Tsingtek Serial Lcd Display Module, TI is currently the only manufacturer worldwide DMD chip supply caused by the projector's weak areas , inadequate supply of core components , low yield, expensive, and therefore to some extent limit the development of this product , Besides the long run DLP projection technology is restricted in ultra-high resolution ( 2000 lines or more ) terms .