Multi-interval optimization OSPWM algorithm

Abstract

The invention discloses a multi-interval optimization OSPWM algorithm, which is implemented by the following steps of: averagely distributing 2C GCLKs for displaying C-bit gray data to 2A sub-cycles; setting a low-gray high-brush mode refresh rate threshold value F, a register L and a register H; dividing the gray data into four gray intervals, namely low gray, secondary low gray, secondary high gray and high gray; under the low gray condition, dividing gray data into D groups, wherein each group comprises L GCLKs, and the distances among the groups are equal; under the secondary low gray condition, carrying out scattering distribution with the minimum value being 1 GCLK, wherein the distances among the groups are equal; under the secondary high gray condition, setting an optimization level of a transformation algorithm to be H, wherein the minimum opening width of the algorithm is H GCLKs; dividing the redundant gray data by H to obtain a quotient D and a remainder R; reopening the quotient D groups GCLK according to a uniform scattering sequence, wherein the distances among the groups are equal, and fixedly distributing the remaining gray data R to the 0th group; and under the high gray condition, setting the gray level data to be greater than 2A*H, and carrying out scattering distribution with the minimum value being 1 GCLK, wherein the distances among the groups are equal.

Description

technical field [0001] The invention relates to the technical field of LED display, in particular to a multi-interval optimized OSPWM algorithm. Background technique [0002] LED, also known as light-emitting diode, has the advantages of low power consumption, low cost, high brightness, rich colors, long service life, flexible application, and good uniformity. It has been widely used in stations, hospitals, airports, and other indoor and outdoor LED large-screen displays . Since entering the 21st century, LED has been making continuous progress in the wave of rapid development of electronic information industrialization and urban construction. People's demand for light source display effect and display quality is also developing in large quantities and diversification. Therefore, the LED industry has a large Development potential. [0003] The visual refresh rate is an important indicator to measure the LED display effect. The higher the refresh rate, the less the human ey...

AI Technical Summary

Problems solved by technology

In order to solve the problem of low gray "pitting", although the above method can alleviate the low gray problem to a certain extent, it will bring the problem of insufficient low gray refresh rate

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