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LED screen brightness correction method and device

A technology of LED screen and brightness correction, applied in static indicators, instruments, etc., can solve the problems of high cost, inconvenience for users, and cumbersome process of brightness correction of LED screen.

Active Publication Date: 2021-03-23
BEIJING KYSTAR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the correction technology of full-color LED screens is mainly concentrated in a few developed countries abroad, and the correction equipment is expensive
When using general shooting equipment such as cameras for calibration, due to the difference between the spectral response of the camera and the CIE-XYZ standard, there is a large error between it and the brightness and chromaticity values ​​measured by the photometer, so it cannot be directly used for calibration purposes
Therefore, the calibration process of the brightness of the LED screen in the prior art is not only cumbersome but also expensive, and the calibration accuracy cannot be guaranteed, which is inconvenient for users

Method used

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  • LED screen brightness correction method and device
  • LED screen brightness correction method and device

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Embodiment Construction

[0063] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0064] figure 1 It is a flowchart of a method for correcting brightness of an LED screen according to an exemplary embodiment of the present disclosure. Such as figure 1 As shown, the method includes steps 101 to 104.

[0065] In step 101, three photos of when the LED screen displays three colors of red, green and blue under preset brightness are acquired. The device used to obtain the photo can be any shooting device, for example, a single-lens reflex camera, a digital camera, a smart phone with a camera, and the like. The three photos may be directly taken photos, or spliced ​​from multiple photos taken for each color. For example, it is possible to ta...

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Abstract

The invention relates to an LED screen brightness correction method and device. The method comprises the steps of obtaining three photos when an LED screen displays three colors of red, green and blueunder preset brightness; respectively determining the measurement brightness of all lamp points on each of the three photos; determining the measurement relative brightness of the lamp points according to the measurement brightness of all the lamp points on each picture; and according to the preset relation curves corresponding to the three colors and the measured relative brightness of the lamppoints, obtaining the target relative brightness of each lamp point in each picture, and taking the target relative brightness of the lamp points as a correction coefficient of the lamp points, so that the LED screen performs brightness correction according to the correction coefficient. Thus, the LED screen correction process is greatly simplified under the condition that the correction accuracyis improved, the cost is reduced, and the LED screen correction method is more convenient for users to use.

Description

technical field [0001] The present disclosure relates to the field of LED screen calibration, and in particular, to a method and device for LED screen brightness calibration. Background technique [0002] For the full-color LED screen that is currently used most, it is composed of a color LED array, and the color of each color LED includes red, green and blue three-color LED lights. According to the principle of addition of three primary colors, various complex colors can be displayed by controlling the pulse width modulation signals of RGB three-color lights. [0003] According to the above LED color rendering principle, in fact, before the LED screen leaves the factory, if the RGB three-color color matching of a single light point is inconsistent, it will cause the screen "snowflakes" or "pitting" phenomenon. And with the long-term use of the LED screen, the degree of attenuation of the RGB three-color lights is different, which will also cause deviations in brightness or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/0233
Inventor 曾少青邵寅亮
Owner BEIJING KYSTAR TECH CO LTD
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