Standard dot matrix light source and image point correction method of LED display screen

Abstract

The invention discloses a standard dot matrix light source and an image point correction method of a light-emitting diode (LED) display screen. The method comprises the following steps of: A, constructing the standard dot matrix light source, and calibrating the brightness and the chroma of the standard dot matrix light source; B, acquiring image data of the LED display screen, and the brightness and the chroma of the standard dot matrix light source; C, comparing the acquired brightness and chroma of the standard dot matrix light source with a stored value to obtain an error compensation matrix, and converting the image data of the LED display screen from a relative value into an absolute value; D, analyzing the converted image data of the LED display screen to generate a data correction coefficient matrix; and E, outputting the data correction coefficient matrix to an image point correction processor to perform image data correction processing so as to obtain corrected image data according to the data correction coefficient matrix, and finally outputting the corrected image data to an LED large screen display system. The standard dot matrix light source and the image point correction method can overcome adverse effects caused by working condition drifting of a camera to ensure that the LED display screen has better light-color consistence and white balance after performing the image point correction; and an additional light colorimeter is not needed, and a plurality of times of tests are not performed any more.

Description

technical field [0001] The invention relates to the technical field of LED display, in particular to a standard dot matrix light source and an image point correction method of an LED display screen. Background technique [0002] With the development of science and technology, LED display has been widely used. The LED display is a display device composed of light-emitting diodes arranged in a matrix, which can display characters and image information. Due to the difference in brightness of light-emitting diodes during production and different degrees of brightness attenuation during use, the overall brightness and chromaticity of the LED display are uneven, which seriously affects the display effect of the LED display. A feasible way to solve the inconsistency of light and color of LED display screen is point-by-point brightness and chromaticity correction. The existing implementation methods are as follows: figure 1 shown, including: [0003] 101. Use the camera to collec...

AI Technical Summary

Problems solved by technology

[0006] This method has the following defects: the working state of the camera drifts, so there is a large deviation in the collected image data, so that in the subsequent correction process, only the method of relative value can be used, which makes the image point correction not accurate enough. After processing, the brightness loss of the LED display is large and the consistency of the white balance is poor

Images