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LED drive chip display controlling OS-PWM method

A technology of LED driving and display control, applied in static indicators, instruments, etc., can solve the problems of dark first line, low gray block, color cast, etc., to improve the refresh rate, delicate and true colors, flexibility and applicability strong effect

Active Publication Date: 2019-01-04
58TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a LED driver chip display control OS-PWM method to solve the existing problems such as low gray block, color cast, pitting, dark first line, etc., to make the display screen more clear, delicate and real

Method used

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Embodiment 1

[0039] The invention provides a LED driver chip display control OS-PWM method, the schematic flow chart of which is as follows figure 1 shown. The LED driver chip display control OS-PWM method comprises the following steps:

[0040] STEP1. Set the number of digits of grayscale binary data to be displayed N, refresh multiple 2 K , optimization level G, N is a positive integer, K and G are non-negative integers smaller than N;

[0041] STEP2. Divide the grayscale data into M-bit high-order data and L-bit low-order data, wherein M+L=N and M>L, and M and L are positive integers;

[0042] STEP3, according to refresh multiple 2 K , the entire display cycle, a total of 2 N clock cycle, broken into 2 L ×2 K sub-period;

[0043] STEP4, according to refresh multiple 2 K and optimization level G, the M-bit high-order data is evenly distributed to 2 L ×2 K in a sub-cycle;

[0044] STEP5, according to refresh multiple 2 K And optimization level G, evenly distribute the remainin...

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Abstract

The invention discloses an LED drive chip display controlling OS-PWM method, and belongs to the technical field of LED display. The method includes the steps of 1) setting display gray binary data digit N, refreshing multiple 2K, optimizing grades G and N to be positive integers, and K and G to be non-negative integers less than N; 2, dividing that gray data into M-bit high-order data and L-bit low-order data, wherein, M+L=N and M & gt; L, M and L are positive integers; 3, according to that refresh multiple of 2K, interspersing the whole display cycle, totally 2N clock cycles, into 2L * 2K sub-cycles; 4, distributing M bits of high-order data evenly into 2L x 2K sub-cycles according to that refresh multiple 2K and the optimization grade G; 5, uniformly distributing that remaining L-bit low-order data into 2L x 2K sub-cycles according to the refresh multiple 2K and the optimization grade G; 6: according to the number of rows R and the number of channels C displayed by the LEDs, respectively applying step 1 to step 5 for R*C times to generate a PWM control LED display, wherein R and C are positive integers.

Description

technical field [0001] The invention relates to the technical field of LED display, in particular to an OS-PWM method for LED driver chip display control. Background technique [0002] As a new type of semiconductor lighting material, LED is widely used in lighting equipment, display screens and other electronic equipment due to its advantages of low power consumption, long life, small size, low cost, high efficiency and safety, and green and pollution-free. Small-pitch LED displays have the advantages of seamless splicing, natural and real colors, clear pictures, modular maintenance, and good display uniformity. Research hotspots. [0003] LED display driving methods can be roughly divided into DC-DC, resistor current limiting and constant current driving. DC-DC mainly includes three topologies: buck, boost and buck-boost, with low power consumption but complex external circuits, and is usually used in high-power LED lighting. Resistor current limiting is low in cost, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32
Inventor 范学仕唐茂洁曾忠李明晓夏云汉
Owner 58TH RES INST OF CETC
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