Method for scanning LED displayer

Abstract

The invention relates to a method for scanning an LED displayer. The method includes the steps that a plurality of rows of LEDs in the LED displayer are evenly divided into an upper half and a lower half, and the same scanning sequence is adopted in the upper half and the lower half for synchronous scanning. The scanning sequence is as follows: in the upper half or the lower half, the first row of LEDs is scanned, the last row of LEDs is scanned, the second row of LEDs below the first row of LEDs is scanned, the second row of LEDs from the bottom above the last row of LEDs is scanned, the rest can be done in the same manner, scanning is carried out on the upper half or the lower half gradually from the head end and the tail end to the middle until all rows of LEDs of the upper half or the lower half are scanned once, and a scanning cycle is formed. According to the method, under the circumstance that hardware cost is not changed, luminance is guaranteed, meanwhile the phenomenon of error rows is relieved, and therefore the display effect of the LED displayer is guaranteed.

Description

technical field [0001] The invention relates to a scanning method of an LED display. Background technique [0002] The display principle of the LED display is to use the visual residue of the human eye to form an image. Although only one or several rows of LED lights are on at the same time, according to the visual residual effect, people will feel that the LEDs displaying patterns on the screen are all on. [0003] In order to obtain a good visual effect, the image should be refreshed more than 60 times per second, that is, the scanning frequency of 60Hz of a common display. The faster the refresh rate, the better the visuals. However, due to the power-on characteristics of the LED itself, the faster the refresh rate, the lower the brightness of the LED, so there is such a problem that when the refresh rate is low, the image brightness is higher, but due to the visual residual effect, the pattern will go wrong; After increasing the refresh rate, the misalignment phenomen...

AI Technical Summary

Problems solved by technology

Since the scanning time difference between the 1st row to the 8th row and the 9th row to the 16th row is Δt, and only the scanning time difference between the LED row 8 and the LED row 9 is 7Δt, therefore, If the scanning speed is slow, it will cause a sudden change visually, resulting in the feeling that the 8th line lags behind the 9th line display

However, if the scanning speed is accelerated, although the above-mentioned visual mutation will be weakened, the brightness of the LED display cannot be guaranteed.

[0005] In the past, the solution to the above problems was solved by hardware, such as changing 8 scans to 4 scans, 2 scans, or even static scans, but the hardware cost will increase exponentially. times, the static is 2 sweep times

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