DLP technology is a patented technology of TI (Texas Instruments). The projector based on DLP display technology first appeared in 1996. Its imaging device is DMD (digital micromirror device). DMD chip contains thousands of micromirrors, each mirror represents a pixel, and the on or off state represents the brightness of the pixel in the image. The light beam is projected onto the DMD through the high-speed rotating color wheel (color separation device), and then onto the big screen through the optical lens. At present, DLP technology is patented by TI, and TI is also the only supplier of DMD chips.
First, the technical advantages of DLP projectors
The first is digital advantage: the adoption of digital technology makes the contrast, gray scale (256- 1024), color (2563- 10243), signal-to-noise ratio and stable image quality of the image excellent.
Secondly, the advantage of reflection: due to the application of reflective DMD devices, the distance between micromirrors that constitute DLP image pixels is very small, which makes the light transmission efficiency of imaging devices reach more than 85%. The generated image is very bright and has high definition.
B, DLP projector can be divided into:
Single-chip microcomputer: The advantages of single-chip DLP projector are high light efficiency, high contrast and clear image, especially in black and white graphics and text. At the same time, the single-chip DLP projector can be small and light, but the disadvantage is that the color performance is not realistic and natural.
Three-chip machine: DLP projector made of three DMD chips has higher brightness and richer colors, and the brightness can be as high as 10000ANSI lumens, which is mostly used in special occasions such as digital cinemas.
At present, projectors on the market mainly include LCD technology and DLP technology. Most Japanese manufacturers adopt LCD technology, while European and American manufacturers can adopt LCD and DLP technology. The competition between LCD and DLP is fierce. There is no clear answer about whose product and technology are better, but it can be said for sure that the projector using DLP has higher picture contrast and more compact optical system, so it has advantages in volume and weight. And LCD is very strong in brightness uniformity, color and detail.