Display data transmission method

Abstract

The invention discloses a display data transmission method, and the method comprises the steps: (1) dividing gray scale data into common integer data and n groups of remainder data, and enabling the remainder data R to be formed by multiplying remainder coefficient data Ri by a set remainder weight WR; (2) adding P groups of remainder weights Vj, wherein the P groups of remainder weights Vj are smaller than the set remainder weight WR, and the corresponding remainder coefficient data Tj is used for supplementing displayed remainder data groups in the low-gray-scale data; and (3) sending the common integer data, the remainder data and the remainder data set to an LED driving chip through a data bus by using a controller. After the plurality of groups of remainder data with the same weight are transmitted, the plurality of groups of remainder data groups with low weights are added, the data bus bandwidth is reduced while gray scale missing display is supplemented, and the storage cost isreduced.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a gray scale display data transmission method. Background technique [0002] In mid-to-high-end display screens, a constant current source driver chip capable of outputting high refresh rate PWM is often used. When the data bus transmits data, all grayscale data is directly transferred to the chip, stored by the chip, and then branched and grouped for PWM. Pulse display. For the constant current source drive chips that receive public integer data and remainder coefficient data in time-division, if the drive device sets (or fixes) the remainder weight through the register is small, it is easy to produce low gray unevenness when displaying, if the drive device The (or fixed) remainder weight set by the register is relatively large, and when the receiving device displays, it is easy to cause a large jump in the actual accumulated display gray level during the data superposition pro...

AI Technical Summary

Problems solved by technology

For the constant current source drive chips that receive public integer data and remainder coefficient data in time-division, if the drive device sets (or fixes) the remainder weight through the register is small, it is easy to produce low gray unevenness when displaying, if the drive device The (or fixed) remainder weight set by the register is relatively large, and when the receiving device displays, it is easy to cause a large jump in the actual cumulative display gray level during the data superposition process due to the lack of part of the gray level, resulting in gray jumping phenomenon

Therefore, it has become an urgent technical problem to solve the problem of non-uniform low-gray-scale display when all the above-mentioned gray-scale data are directly transmitted to the chip for display.

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