DLP is the abbreviation of "DigitalLightProcessing", i.e. digital light processing. That is to say, the image signal should be processed digitally before the light is projected. It is based on the DigitalMicromirrorDevice (DMD) developed by TI (Texas Instruments) company to display the visual digital information. Specifically, DLP projection technology uses DMD as the main processing element to realize the digital optical processing.
DMD chip is an extremely accurate optical switch device. It can reflect light through micro mirror matrix and form projection, which can digitally modulate light. In DLP orthographic projection system or HDTV, red, green and blue light alternately irradiate the lenses, which are turned on or off according to the video or graphics signal fed into the bottom memory chip. Lenses are switched on and off more than thousands of times a second; the light they reflect passes through the lens and reaches the screen to produce images.
LIn projectors for high brightness applications, three DLP chips are used - green, red and blue, respectively. The light generated by the lamp will be separated into these three colors by the prism, and then directed to the corresponding DLP chip. Then, the reflections of the corresponding pixels on each DLP chip are recombined to generate the image.
The single-chip DMD system used in DLP TV, home theater and small media projector consists of a DMD chip, a light bulb, a color wheel and a projection lens. These devices can well generate sharp and colorful video and images in theaters and some large places. A 3-piece DLP system has more realistic colors and higher brightness. In a 3-chip DLP system, white light is divided into red, green and blue light through prism. These three colors correspond to one DLP chip, and the colored light reflected by each DLP chip will be mixed together to generate a pixel on the screen through the projection lens. DLP cinema system can generate more than 35 trillion colors, bringing unparalleled visual experience.
With DLP technology, commercial projectors, home theater systems, high-definition TVs and large venue projectors can provide incredibly clear and sharp images. It is a digital technology, so DLP projection system can always maintain excellent performance in the service life of the projector, thus bringing unimaginable reliability for display electronic products. Moreover, DLP technology is based on semiconductors, and its lightweight characteristics enable manufacturers to develop smaller, lighter and better products than other technologies. Portable projectors with DLP technology can currently provide 2000 lumens or higher output with a total weight of two pounds.