What is the difference between LCD and DLP large screen splicing?

Edit this paragraph DID (digital information display)

It is the abbreviation of digital information display. Samsung Electronics introduced a new generation of LCD technology in 2006, which is widely used in all walks of life (hydropower production and dispatching, military command, urban management, mining safety, environmental monitoring, fire protection, meteorology and maritime command system. Security monitoring, information release (government-enterprise video conference, financial securities, airport metro shopping malls, hotels, short message information, etc.). ), display system (media advertisements such as theaters, gymnasiums, expositions, concerts and parties. ), as well as commercial leasing of display equipment. Because of its unique display technology, unlike ordinary LCD, it improves the arrangement structure of liquid crystal molecules and can be placed on the ceiling horizontally and vertically. High brightness, high definition (1080P), long service life, stable operation and low maintenance cost.

Digital light processing

Digital light processing (DLP) is an imaging technology for projectors and rear projection televisions. DLP technology was first developed by Texas Instruments. It is still the main supplier of this technology. Now DLP technology is adopted by many licensees, and the products they sell are all based on Texas Instruments chipset. Flawn Hof Institute in Dresden also produces digital light processors with special purposes, which are called spatial light modulators (SLM). For example, the Swedish Microelectronics Laser System Company in Sweden uses the spatial light modulator produced by Flawn Hof Company to produce far ultraviolet images in its Sigma printing plate silicon template engraving machine. In DLP projectors, images are generated by DMD (Digital Micro Mirror Device). DMD is a matrix composed of microlenses (precision and micro-mirrors) arranged on a semiconductor chip, and each microlens controls a pixel in the projection picture. The number of microlenses is consistent with the resolution of the projected picture. 800×600, 1024×768, 1280×720, 1920× 1080 (HDTV) are some common DMD sizes. Under the control of digital driving signals, these micromirrors can quickly change their angles. Once the corresponding signal is received, the micromirror will tilt 10, thus changing the reflection direction of the incident light. The micro-lens in the projection state is displayed as "On", which inclines+10 with the digital signal; If the microlens is in a non-projection state, it is displayed as "off" and tilted-10. At the same time, the incident light reflected in the "on" state projects the image onto the screen through the projection lens; The incident light reflected on the microlens in the "off" state is absorbed by the light absorber. In essence, the angle of microlens has only two states: "On" and "Off". The frequency at which the microlens switches between the two states can be changed, which makes the light reflected by the DMD present various gray levels between black (the microlens is in the "off" state) and white (the microlens is in the "on" state). DLP projectors mainly produce color images by two methods, which are used for a single DLP projector and three DLP projectors. Single-chip DLP projector Only one DMD chip is installed in the single-chip DLP projector, and colors are generated by installing a color wheel between the light source and the DMD. The color wheel is usually divided into four areas: red area, green area, blue area and transparent area for increasing brightness. Because transparent areas will weaken the saturation of colors, they may be disabled or simply omitted in some models of projectors. The DMD chip is synchronized with the rotation of the color wheel, so when the blue part of the color wheel is located in front of the light source, the DMD displays the blue part of the picture. The situation of red and green is similar. The red, green and blue pictures are projected at a very high speed in turn, so the observer can see the synthesized "full color" picture. In the early model, the color wheel only rotated once every frame was displayed. In later models, the color wheel rotates at a frame rate of two to three times, and some models also repeat the color areas on the color wheel twice at the same time, which means that the red, green and blue sequential images will be repeated six times in one frame. Shenzhen Teyali gives you a professional answer, which I hope to adopt.