Gray scale signal compensation unit, compensation method, source driver and display device

Abstract

The invention discloses a gray scale signal compensation unit, a compensation method, a source driver and a display device, comprising: a compensation coefficient determination module, a query module, a calculation module and a compensation module, wherein the compensation coefficient determination module is used to determine the Determine the compensation coefficient at the position; the query module is used to query the reference compensation value corresponding to the initial gray-scale signal according to the gray-scale compensation correspondence table of the row of pixels farthest from the source driving circuit stored in advance; The coefficient and the inquired reference compensation value calculate the actual compensation value corresponding to the pixel to be driven; the compensation module is used to compensate the initial gray scale signal according to the actual compensation value. The technical scheme of the invention can effectively compensate the initial gray scale signal output by the source drive circuit, so that the charging rate of pixels in each row on the display panel is equal, and the display brightness of the display panel is uniform.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a grayscale signal compensation unit, a compensation method, a source driver and a display device. Background technique [0002] With the continuous development of display technology, display devices with large size, high resolution and high refresh rate have become a research hotspot in the display field. [0003] In the existing display device, the source driving electrodes are arranged on one side (generally the lower side) of the display panel, and when the source driving electrodes charge the pixels through the data lines, along with the connection between the pixels and the source driving circuits The greater the distance is, the greater the resistance of the data line and the greater the capacitance between the data line and the common electrode, that is, the more serious the RC Delay. figure 1 A schematic diagram of the source driver circuit in the prior ar...

AI Technical Summary

Problems solved by technology

figure 1 It is a schematic diagram of the source drive circuit in the prior art when providing grayscale signals to pixels located at different positions, such as figure 1 As shown, the solid line represents the waveform of the gray-scale signal loaded by the source drive circuit to the pixel closer to it, and the dotted line represents the waveform of the gray-scale signal loaded by the source drive circuit to the pixel farther away from it. When distant pixels provide grayscale signals, affected by RC Delay, the charging speed drops, and the target grayscale cannot be reached within the preset charging time, that is, the charging rate is insufficient

[0004] It can be seen from the above content that the charging rate of the pixels on the display panel decreases gradually from bottom to top, resulting in a gradual decrease in the brightness of the display panel from bottom to top, and the display panel displays uneven brightness.

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