LED display screen seam correcting method

Abstract

The invention provides an LED display screen seam correcting method. The method comprises the steps that (1) the size of bright and dark line regions, which are alternately arranged in X and Y axis directions, of spliced units of spliced display screen modules is determined; (2) camera shooting is carried out on the size of domain spliced units in the display screen module areas to acquire a target image; (3) the target image is processed to acquire the gray level of the spliced display screen module areas; (4) the brightness correction coefficient of each edge display screen module of splicing gaps which divide adjacent display screen module areas in a spliced display screen is calculated, and the coefficient is, as a reference, for supplementing and correcting the splicing gaps of the display screen which lead to brightness errors of spliced bright and dark lines; and (5) the module lamp bead spacing of bright blocks of the spliced display screen and the spacing of the splicing gapsof the display screen modules are calculated, and through the acquired difference between two spacings, the brightness coefficient of edge module units of adjacent splicing gaps is adjusted accordingto the effective brightness ratio coefficient, so as to correct LED display screen seams.

Description

technical field [0001] The invention relates to the technical field of LED display screen control, in particular to a method for correcting LED display screen seams. Background technique [0002] LED display screens are usually spliced ​​by multiple LED display modules. During the splicing process of LED display screens, there are limitations such as manual machining and assembly technology. The splicing between the splicing units of LED display The distance between the edges of the display module lamp beads is inconsistent. During the display process, dark lines will appear when the edge spacing of the LED display module lamp beads is greater than the standard spacing of the display module, and bright lines will appear when the edge spacing of the LED display module lamp beads is smaller than the standard spacing of the display module, forming The dark lines or bright lines are collectively referred to as LED display splicing bright and dark lines in the industry. [0003...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned technology still has defects and errors, as follows (1) In order to obtain the effective lamp bead brightness, it is necessary to take multiple images with the camera and integrate the brightness coefficient. At the same time, there is jitter during the shooting process, and the position of the LED module lamp bead will shift. Therefore, there is also an error in the LED lamp bead spacing obtained by integrating the image brightness coefficient, and the corrected brightness coefficient is relatively inaccurate; (2) Due to the unknown situation of the LED display splicing module unit, it is possible to obtain the LED lamp bead through the algorithm The brightness effective area difference is greater than the actual module lamp bead spacing, and the calculated brightness correction coefficient also corrects the position of the splicing gap, resulting in uneven brightness of the final corrected screen; (3) If the LED display screen The bigger the camera is to take effective pictures, the distance between the camera and the LED display screen needs to be enlarged, and a larger step size (X*X) needs to be taken for image shooting, resulting in more RGBxyz related images (X*X) ); this process will also have the problems in the above (2), which will cause the image position to shift, and the resulting error will be even greater

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