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Self-adaption LED (Light Emitting Diode) dynamic backlight method

A dynamic backlight and self-adaptive technology, applied to static indicators, instruments, etc.

Active Publication Date: 2014-11-12
南京美基森信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the existing problems of the prior art, the present invention discloses an adaptive LED dynamic backlight method, aiming to solve the defects of the above existing patent methods in whole or in part

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Embodiment Construction

[0016] The invention mainly researches an adaptive LED dynamic backlight method, which is used for controlling the LED backlight module of a liquid crystal display, and aims at reducing the driving circuit of the backlight source and displaying images with stronger contrast.

[0017] Instructions attached figure 1 It is a schematic diagram of the structure of a liquid crystal display with LED backlight. The LCD itself does not emit light, it relies on the backlight to pass light through the LCD to display images. Unit 1 is an LCD liquid crystal panel; Unit 2 is a diffuser plate, which refracts and diffuses the light emitted by the backlight multiple times to make the backlight more uniform; Unit 3 is a prism sheet, which is a concentrating device, using the law of total reflection and refraction to The dispersed light is concentrated in a certain range of angles and emitted to improve the brightness within the range of output; unit 4 is a light guide plate, which uses an opti...

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Abstract

The invention belongs to the technical field of research on liquid crystal display backlight, relating to a self-adaption LED (Light Emitting Diode) dynamic backlight method, which comprises the following steps of: A, acquiring a signal of an image to be displayed, and then acquiring the luminance value matrixes of pixel points R, G and B of the image according to the components of the pixel points; B, mapping the luminance value matrixes through an IMF (Inverse Mapping Function ) to acquire a new luminance matrix; C, decomposing the new luminance matrix to line and row timing sequence matrixes according to a combination optimization algorithm; and D, transforming the line and row timing sequence matrixes to line and row timing sequence control signals according to a line and row decomposition control method, and then driving an LED backlight source module. Due to the adoption of the line and row decomposition control method for controlling the LED module, the self-adaption LED dynamic backlight method reduces the quantity of driving circuits to a great extent, and simultaneously, acquires a high image display contrast.

Description

technical field [0001] The invention belongs to the field of liquid crystal display backlight technology research and relates to an adaptive LED (Light Emitting Diode) dynamic backlight method. Background technique [0002] As a passive display device, liquid crystal display does not emit light itself. It relies on the backlight to transmit light through the display panel to display images. The structure is as follows: figure 1 shown. Traditional liquid crystal displays use CCFL (Cold Cathode Fluorescent Lamp) as the backlight source, which can display images after being modulated by the liquid crystal signal. However, since the backlight source is always in a fully bright state, it will cause two major defects. 1. The liquid crystal has the problem of light leakage for dark images. Because the liquid crystal material cannot block the backlight 100% when displaying dark images, there will often be dark light leakage in the display of dark images, which seriously reduces th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34
Inventor 李杨都思丹储培赵康僆汪琪刘佳赵静姜华徐俊梅姜新
Owner 南京美基森信息技术有限公司