Multi-interval optimization OSPWM algorithm

A multi-interval and algorithm technology, applied in instruments, static indicators, etc., can solve the problem of insufficient low-gray refresh rate, and achieve the effect of improving low-gray display effect, improving display effect, and increasing display refresh rate.

Active Publication Date: 2021-12-14
CHINA KEY SYST & INTEGRATED CIRCUIT
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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

Method used

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  • Multi-interval optimization OSPWM algorithm

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Embodiment 1

[0034] The present invention provides a kind of multi-interval optimization OSPWM algorithm, and its flow process is as follows image 3 shown, including the following steps:

[0035] Step 1, 2 required to display C-bit grayscale data C GCLKs are evenly distributed to 2 A In sub-periods, each sub-period includes 2 B GCLK, C, A, B are positive integers, C=A+B;

[0036] Step 2. Set the refresh rate threshold F of the low-gray and high-refresh mode. F is a positive integer and the unit is Hertz Hz. The setting registers L and H are used to configure the grayscale data optimization level, and configure different levels in different ranges according to the input grayscale. The optimization level is used for processing, where the registers L and H are respectively for low-gray and high-gray scenes, and L and H can be configured in multiple modes through configuration registers, such as optimizing L1, L2, H1, H2...;

[0037]Step 3. Divide the grayscale data into four grayscale in...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32
Inventor 陈伟王志南范学仕
Owner CHINA KEY SYST & INTEGRATED CIRCUIT
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