What is a DLP Projector?

Digital light processing projector is a projection technology that uses Texas Instruments' digital micromirror device DMD chip as the imaging device to adjust the reflected light to project the image. It is very different from LCD projectors, and its imaging is achieved by reflecting light through thousands of tiny lenses.

DLP projector

Digital Light Processing

Single-chip DMD machine (mainly used in portable projection products), two-chip DMD machine (for large-scale mosaic display wall), three-chip DMD machine (for ultra-high-brightness projector).

Taking 1024 × 768 resolution as an example, there are 1024 × 768 small mirrors on a DMD.

DMD projector can be divided into single-piece type, double-piece type and three-piece type according to the number of reflective lenses. Taking the monolithic type as an example, DLP can produce color due to the color wheel (composed of red, green, and blue groups) placed on the path of the light source.

From the perspective of market performance, single-chip DLP projectors occupy most of the market share in the low-end market due to cost-effective advantages, and 3DLP technology has absolute right to speak in the high-end market. Currently in the increasingly popular LED micro-projector, DLP technology is also mostly used. However, in the traditional mid-end industry market, DLP performance is not outstanding enough, and there is a lot of room for improvement.

DLP projector advantages

From a technical point of view, DLP projectors mainly have three characteristics: high native contrast, small size of the machine, and closed light path. In the previous article, we mentioned that the DMD chip uses a mechanical working method. The movement of the lens is more controllable, and it is expected that the native contrast is higher. The DLP projector uses the reflective principle, which makes it easier to achieve a high aperture ratio. The DLP optical path system with the same configuration is smaller, and the machine can certainly be smaller. In addition, the DMD chip uses a semiconductor structure. It is not easy to change the lens at high temperatures. Therefore, the DLP projector uses a closed light path to reduce the probability of dust entering.

DLP projector disadvantages

The color effect of the DLP projector depends on the color wheel and the movement of the DMD chip. The reflection structure of the single-chip DLP projection system

Especially in the low-end products, the single-chip DLP projection system is slightly inferior to the three-primary color LCD projector in terms of image color reproduction, and the colors are not bright and vivid.

Future trends of DLP projectors

According to data released by a third party not long ago, DLP has failed to surpass 3LCD in more than 10 quarters. Although it has an advantage in the low-end and high-end markets, DLP needs to progress in the mid-end market. But for DLP itself, its future is worth looking forward to.

Educational projectors: DLP technology brings high definition and high native contrast, resulting in 1080p resolution, ensuring that class content is clearly visible even from the end of the classroom. The recommended products are ViewSonic PJD5353LS and PJD5553LWS. DLP products, with SmartSource 3D and no-light technology, can improve teachers 'teaching effectiveness, attract students' attention, and help schools reduce total cost of ownership (TCO). ^[1]

Home theater projectors: DLP technology enables viewing with SmartSource 3D. Home theater projectors with DLP technology deliver superior picture quality. Such as sending PJD7822HDL, PJD7830HDL, PJD7835HD and so on. Fast DLP technology enables smooth video playback and cinema-like effects. Fast action videos are clear and sharp without motion blur. ^[2]

Large-scale venue and professional market engineering projectors: Based on the same proven technology used in DLP Cinema, DLP technology supports projectors with 6,000 to 50,000 lumens in large venues. Such as Pro10100, Pro10120, Pro10500, etc. due to the DLP 3 chip projector structure, more light can be projected onto the screen, because there is a larger reflective surface area available for projecting images. Achievement: Project a large number of pictures on the large screen of places with strict requirements on the size of the projected image (including concerts, theaters, musicals, chapels, etc.). ^[3]