1. Compact structure: Compared with the three-panel LCD projector, the single-panel DLP is simple in optical structure, small in size and light in weight, and is most suitable for being a slimming projector.
2. High light efficiency: due to the principle limitation, the light utilization rate of transmissive LCD is not high, and the total light transmittance is less than 10% due to the shielding of light by pixel boundaries and circuit parts. DLP adopts reflection technology, the gap between mirrors is relatively small, and the light utilization rate can reach 20%-30%. Therefore, in order to achieve the same brightness, DLP projectors need lower light source power, save power, and simplify the cooling system to further reduce volume, weight and noise.
3. High contrast: The contrast of DLP technology can reach 800:1-1600:1(measured by all black and all white), and the picture has good contrast and strong stereoscopic effect. However, LCD is limited by the properties of liquid crystal materials, and the contrast is poor, only 400: 1-800: 1.
4. Long service life and good image quality stability: the reflection technology makes the DMD chip absorb relatively little energy, and because it is a semiconductor device, it has good high temperature resistance, and the picture will not deteriorate obviously after long-term use. However, the liquid crystal molecules in the liquid crystal panel are decomposed and destroyed due to long-term heating, which leads to a serious decline in image quality. In addition, the LCD panel must be cooled by flowing air, which is easy to accumulate dust, which not only affects the image quality, but also causes heat concentration, further reducing the service life. Because of its good temperature resistance, DLP can adopt a relatively closed optical and mechanical structure to avoid the degradation of image quality caused by dust deposition.
5. There is no connection problem: LCD projectors are mostly three-plate structures. If the superposition of three-color optical paths is not very accurate, there will be three-color misalignment-convergence distortion, which is somewhat similar to CRT display. The common DLP projector adopts single-board structure and uses rotating color wheel to generate colors, so there is no problem of inaccurate superposition and convergence distortion.
6. Fast response: The response time of DLP screen switching is only a few milliseconds, and the objects moving at high speed in the screen can remain clear and sharp. The response time of LCD is in the range of ten to tens of milliseconds, and this switching delay will cause the picture to be blurred.
Although the current market share of DLP projector is not as good as that of the main LCD projector, as a brand-new projector product, in terms of technology and application market, compared with LCD projection technology, the biggest advantages of DLP projection are high resolution and high brightness, clearer and sharper images, purer black and white, richer gray levels, smaller size and lighter weight. Its application has gradually developed to high-end models such as large projectors and digital cinemas, as well as ultra-miniature models below 2kg, and has developed towards polarization. Especially in the projection and projection of large venues, DLP projectors are still outstanding at present, so DLP has become an important direction of projector development in the future, and its application fields and market prospects are quite promising.