ADD: 708 Lianfu Building, No.1-10, Qifu Road, Baiyun New City, distrito de Baiyun, Guangzhou, China
TEL: + 86-20-36700051
The traditional LED display does not have a low gray level when the brightness is too low, but it is not the key problem for the LED display to enter the traditional professional AV display field, but unfortunately, this problem has been infinitely magnified by some small spacing LED display manufacturers to become the main problem of the small spacing LED display screen, and even put forward the small size of the LED display screen. The spaced LED display, "standard", seems to be "solving" the problem with a small spacing of LED displays that are qualified to enter the traditional professional AV display field, and vice versa.
First of all, LED, a light emitting diode, is a semiconductor diode, so it has a threshold voltage that can not escape the diode. Only after the voltage of the loaded diode exceeds the threshold voltage (current), the diode starts to conduct electricity (over the forward dead zone), and the light emitting two transistor LED begins to brighten. The initial region is not linear, and the uniformity of the nonlinear region between the individual products is very poor, and the normal LED working area is the linear work between the front of the saturated region after the nonlinear region is left.
It can be seen from the above that the real solution to the problem of "low brightness and high ash" is no longer just to reduce the current of LED. There is still a long way to go before we can completely solve this problem. Second, the small space LED display low brightness is also not known to be less than the display brightness to lower than 200cd/m2, even said requirements below 100cd/m 2, there are several points to be debatable, one is called "control room demand display brightness in 200cd/m2 300cd/m2", this is the concept of ten years ago, then the display brightness is difficult to do high, in order to To ensure the control room display image quality, the control room is semi black room, personal desk depends on the desk lamp, and the current console is "light and bright", the brightness of 200cd/m2-300cd/ can not satisfy the requirement at radically.
The two is called ''LED' active luminescence and LCD transmittance in the same unit time light halo (brightness), the human eye feels that the luminance of LED active luminescence is two times that of the light luminance of the LCD, thus demonstrating the need for lower brightness of LED. The theory of sex: that is, the active luminescence technology with the same luminance index is two times the luminous intensity of the display screen. Do professional display areas require a perfect display of extremely low brightness, such as flight night simulation in simulation, such as simulation, but this is not the area of the current small spacing LED. Second, the professional film and television production of the trial film, but the professional film and television production of the trial, is due to avoid environmental light interference projection image caused by color deviation (one of the projection display weakness) and in the black room watch, so the screen brightness is not too high, but this is because the use of projector but not the method, the current professional film and television production Most of the films are large size LCD or plasma.
In short, the application of extremely low brightness display is not much, nor is it the direction of small spacing LED display. Of course, because of the current display technology of LED display, there is a problem of reducing the brightness and reducing the gray level, so it is still worth a lot of efforts to make some efforts on this problem at present. But the absolute, unique, unique, even the only standard for small spacing LED displays is not appropriate; in fact, there are a lot of technical improvements in the small space LED screen.