Technology upgrade, HD LED display scene emerges
Technology upgrade, HD LED display scene emerges
In the early days, the high-definition display market has been dominated by DLP display and LCD display. The most important factor is that the picture composition of HD LED display is composed of one lamp bead after another. No matter how small the lamp bead spacing is, it can not compare with LCD and DLP. LCD uses the photoelectric effect of liquid crystal molecules to change the light transmittance or reflectivity of liquid crystal cells to achieve picture display, while DLP performs digital processing through the core DMD display chip, and the light reaches the chip after passing through the color wheel to complete the display. Different display principles lead to different picture effects. For HD LED display screens, how to avoid obvious pixel color patches and graininess in near eye mode has become the primary key point.
With the further reduction of dot spacing and the upgrading of display packaging technology, 4K LED displays have gradually conquered the indoor HD led screen market in recent years. The most typical examples are the application of LED display in conference scenes and optoelectronic fields. The meeting scene belongs to the near eye display scene, and the point spacing record of the hd LED video wall is constantly refreshed. Small spacing display screen can better meet the resolution requirements of indoor large screen, and can display high-definition pictures in DVD, SD, HD, sxga+ and other formats. According to the data, the video wall application in the business conference industry accounted for about 15% of the total video wall market share in 2014, and it is one of the main application fields of small spacing LED display. On some important meeting occasions, not only the on-site audience but also the "off-site guests" watching on TV after being recorded by the camera are looking at the large screen, which must withstand the test of "two eyes" of the on-site audience and the TV audience. That is to say, in the dual use environment of live broadcast and camera live broadcast, the LED small spacing display screen should meet many high standard display requirements, such as low brightness and high gray, color restoration, high refresh, system stability, etc. In the same field of radio and television, LED large screen display technology is also used in professional studios in the field of radio and television. When news, variety shows and other programs with the host as the core are broadcast, it is often necessary to display the necessary graphic information or video with the help of the large screen behind the host to meet the needs of the program. In the field of radio and television, the requirements for broadcast effect are relatively high, so all parameters of the display screen are strictly controlled. For example, the refresh rate should meet certain requirements, so that when the video is captured by the camera, the difference in the refresh rate between the two will not cause "black light band" and other problems. For another example, since the host is often located in front of the display screen, in order to avoid the impact of too bright display screen on the host effect, the studio needs the display screen to achieve better color restoration and display effect under low brightness. The strict picture requirements make the LED display screen have fast response, no shadow, high refresh rate, no stroboscopic, high gray level, adjustable brightness, wide color gamut and wide angle, New technical advantages such as intelligent transmission and control system. With these advantages, the role of HD LED display in the field of radio and television can no longer be replaced, and it has become the "C-bit" protagonist of display equipment in professional studios.
