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Technology | Several cases of full-color LED electronic display driver scanning

45 views admin 2020-04-07

According to statistics, among the full-color LED display screen products, the scanning methods are 1/16, 1/8, 1/4, 1/2, static. How to distinguish between different LED full-color display scanning methods? One of the simplest methods is to count the number of LEDs of the LED electronic display screen unit board and the number of 74HC595. Of course, it also needs to be analyzed in conjunction with the corresponding LED drive scanning characteristics.

LED electronic display

Calculation method: the number of LEDs divided by the number of 74HC595 and then divided by 8 = fractional scanning

The real pixel LED display screen corresponds to the virtual LED electronic display screen: in a nutshell, the real pixel screen refers to the red, green and blue light-emitting tubes constituting the display screen, each of which ends in only one pixel Imaging application to obtain satisfactory brightness.

Virtual pixels use software algorithms to control the end of each color luminous tube to participate in the imaging of multiple adjacent pixels, and then use fewer lamps to complete a larger resolution, which can increase the resolution of the display by four times.

There are 16 scans, 8 scans, 4 scans, etc. on the side of the full-color LED display screen series products, and there are also differences between the following:

  • 1. The scanning method of the LED display screen is different;
  • 2. The brightness of LED electronic display screen is different (16s is less than 8s and less than 4s)
  • 3.the quotation is different, perhaps it is understood that the number of driver IC chips used is different (the same type 16s is less than 8s and less than 4s)
LED electronic display driver

The LED display screens currently on the market can be roughly divided into two methods: static scanning and dynamic scanning! Static scanning is divided into static real pixels and static virtual! Dynamic scanning is also divided into dynamic real image and dynamic virtual, there are 2 scans, 4 scans, 8 scans, 16 scans.

The following is a clarification: the pixel of a full-color module commonly used in the field PH16 is 16 * 8 (2R1G1B). If it is driven by MBI5026, the module uses a total of:

16 * 8 * (2 + 1 + 1) = 512 lights, MBI5026 is a 16-bit chip, 512/16 = 32

1. If 32 MBI5026 chips are used, it is static virtual.

2. If 16 MBI5026 chips are used, it is dynamic 1/2 scan virtual.

3. If 8 MBI5026 chips are used, it is dynamic 1/4 scan virtual. If it is a full-color LED display panel, two red lights are connected in series:

4. Use 24 MBI5026 chips, which are static real pixels.

5. With 12 MBI5026 chips, it is a dynamic 1/2 scan real pixel.

6. Use 6 MBI5026 chips, which are dynamic quarter-scan real pixels.

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