LED screen can display the gorgeous and colorful picture, in the show amazing effect at the same time, have you ever thought of this technique is how to implement, now in this for you about the LED screen video signal processing method.
LED screen can display text, graphics, animation, images, images show all sorts of information, such as the LED screen in driving, reducing power consumption, improve efficiency, color reduction degree and consistency of the difficulty of flat panel display bigger than others. This is because the light-emitting diodes is nor anger device, switch time is nanoseconds, no memory function, coupled with its large display area, the signal transmission distance is long, can't use the most advanced COG, SOB method of large integrated circuit manufacturing, etc.
The following simple introduce LED to the image signal processing methods:
LED to the image signal processing in general there are two ways: one way is to use a dedicated LED signal processor, the interlaced scanning of TV signal, processed into a progressive scan signal, and then played on the LED screen. High-performance treatment function figures as high as 10 yuan of above, interpolation arithmetic to take when doing the scan conversion, motion estimation and compensation, and scan conversion, etc.
High order large LED screen are now using this method, and more of the image signal processing, tries to elevate the signal to the broadcast, the effect is better, of course. Computer image processing, also should pass the processor and then sent to the LED screen display.
Treatment technology is also in constant development, there have been many new algorithms have been proposed. We are familiar with the large size of back projection TV and plasma TV is widely using this method, the effect is much better than ordinary TV. In this case, the output signal is usually according to the transform of signal format to describe, appears to be more exact.

Another method is the multimedia approach, often referred to as synchronous LED screen method, the method using ordinary multimedia card capture TV signal, and demodulation, filter and tone color separation, etc.

Image signal after A/D conversion, MPEG compression coding, in order to store.
Play again to unzip, directly on the computer monitor. Sent to LED screen, signal through a dedicated interface card from computer DVI interface or video card, interface card and some processing.
At this time, the LED screen is actually a computer monitor or on the part of, often referred to as window, can achieve synchronous display of one to one correspondence. Because the computer monitor is progressive scan, so if not for the signal line suction frame for processing, then the LED screen display format is the format of the monitor.
VGA format, for example, is the number of pixels for 640 x480 progressive scan format, the scanning update rate of 75 hz. But the 75 hz progressive scan signal, not the ascension of the source image itself, the quality of the image does not improve, actually less than 50 hz interlaced scanning level, similar to the effect of the DVD or VCD, this is the place where are often confused.
ChouHuan as for some LED screen for the image, such as the information and discard only the odd even picture information sent to the display, less effect of course. Noted, by the way, the images show the situation is simpler, although some animation game also requires good continuity, but for an animation to play the LED screen, screen can accept more than 10 hz update rate.
By the embedded controller or display of single-chip microcomputer control, program produced by the controller, the controller processing capacity constraints, provide fast enough, will cause the discrete image. The most typical phenomenon is that controlled by single chip microcomputer of the screen, the text shift to the left or right, is not smooth but by leaps and bounds. Experience and calculation can be obtained, a composed of 10 xi6 dot matrix characters of 16 bar screen, if the images have to be left at a speed of 5 seconds, in order to move smooth and coherent, its frame frequency must reach more than 15 hz.

This article key words: BVSION HONGKONG CO.,LIMITED, BVSION, BVS, LCD screen, LCD, LCD driver, INNOLUX LCD 

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