LED driving pulse modulation method and system

A technology of LED drive and pulse modulation, which is applied to instruments, static indicators, etc., and can solve the problems of low display refresh rate and poor low grayscale display effect

Active Publication Date: 2013-10-09
SHENZHEN SUNMOON MICROELECTRONICS
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Problems solved by technology

[0006] The purpose of the present invention is to provide a LED driving pulse modulation method, which aims to solve the problems of low LED display refresh rate and poor low grayscale display effect existing in the existing pulse modulation method

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  • LED driving pulse modulation method and system
  • LED driving pulse modulation method and system

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] In the embodiment of the present invention, a display cycle of the grayscale data corresponding to the LED driving pulse is equally divided into a preset number of display subcycles, and then the LED driving pulse corresponding to the highest bit part of the grayscale data is divided into The preset number is evenly divided into a plurality of highest position sub-pulses, and each highest position sub-pulse is allocated to each display sub-cycle, and the LED drive pulse corresponding to the second highest part of the grayscale data is divided into equal parts according to the preset number...

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Abstract

The invention belongs to the field of LED driving and provides an LED driving pulse modulation method and system. The display cycle of gray level data corresponding to LED driving pulses are evenly divided into display sub-cycles of the preset number, the LED driving pulses corresponding to the highest bit portion data in the gray level data are evenly divided into a plurality of highest bit sub-pulses according to a preset number, each highest bit sub-pulse is distributed to each display sub-cycle, the LED driving pulses corresponding to the second-highest bit portion data in the gray level data are evenly divided into a plurality of second-highest bit sub-pulses according to a preset number, each second-highest bit sub-pulse follows each highest bit sub-pulse and is distributed to each display sub-cycle, the LED driving pulses corresponding to the low bit portion data in the gray level data are evenly divided into a plurality of base clock pulses, each base clock pulse follows each second-highest bit sub-pulse and is distributed to each display sub-cycle, and LED display refresh rate and low gray level display effect are improved.

Description

technical field [0001] The invention belongs to the field of LED driving, and in particular relates to an LED driving pulse modulation method and system. Background technique [0002] In recent years, LED has been used as the basic light-emitting device of various light-emitting devices. In the field of LED display screens, large-area display screens composed of dot matrix modules or pixel unit modules composed of LEDs have high reliability, long service life, and environmental adaptability. With the characteristics of strong capability, high price-performance ratio, and low cost of use, it has rapidly grown into a mainstream product of flat panel display in just a decade, and has been widely used in the field of information display. [0003] The industry basically adopts the way of pulse width modulation pulse dimming to dim LED. However, PWM pulse dimming also has its own drawbacks. Because this dimming method needs to average the brightness within a certain period of ti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 石磊吕苏谊符传汇杨亚吉李照华戴文芳
Owner SHENZHEN SUNMOON MICROELECTRONICS
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