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LCD luminance uniformity automatic correcting system and method for LED backlight

A technology of LED backlight and brightness uniformity, applied in the direction of instruments, static indicators, etc., can solve the problems of LED efficiency decline, uneven brightness of the display screen, etc., and achieve the effect of high compensation accuracy

Inactive Publication Date: 2012-09-19
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an LCD brightness uniformity automatic correction system and correction method using LED backlights, which are used to solve the brightness uniformity of LED backlights for LCD backlighting and the correction problems in the use process thereof, to solve the problems caused by After working for a long time, the difference in LED efficiency decreases, resulting in uneven brightness of the display screen, so that the brightness uniformity of the LCD monitor or TV set with LED as the backlight can be automatically corrected after a period of use, and the quality of the LCD monitor can be guaranteed.

Method used

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  • LCD luminance uniformity automatic correcting system and method for LED backlight
  • LCD luminance uniformity automatic correcting system and method for LED backlight
  • LCD luminance uniformity automatic correcting system and method for LED backlight

Examples

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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a kind of LCD brightness uniformity automatic correction system using LED backlight proposed by the present invention consists of a power supply module 1, a current detection module 2, a column driver module 3, a signal processing module 4, a data processor 5, a data memory 6, It consists of a brightness detector 7, an LED array 8 and a row driving module 9.

[0031] The LED light-emitting chip particles or chip groups used in the LED backlight are arranged in a matrix to form an LED array 8 , and the LED array 8 includes a row driving module 9 and a column driving module 3 .

[0032]A current detection module 2 is set in the current path between the power supply module 1 of the LED backlight and the LED light-emitting chip LED array 8; a data memory 6 is set on the path of the current detection module 2, and the data obtained by the detection of the current detection module 2 can be automatically recorded. ;A brightness detection instrument ...

Embodiment 2

[0052] According to the law of change between the LED brightness and the current value obtained in Example 1, if the brightness adjustment is not realized by adjusting the driving current value of the LED particles, it is also possible to perform corresponding compensation processing on the brightness information of the display screen according to the law of current change , to realize the compensation and correction of the brightness uniformity of the display screen.

[0053] The specific method is: according to the correction compensation value of each LED chip obtained in Example 1, a brightness picture is generated, that is, the point with the largest compensation value is used as the reference, and the brightness of the point with a smaller compensation value is correspondingly reduced to form a compensation value corresponding to the correction value of the LED chip. Complementary brightness picture, this brightness picture is superimposed with the brightness signal of th...

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Abstract

The invention belongs to luminance uniformity automatic correcting system and method of an LED backlight used for a flat-panel LCD. The luminance uniformity automatic correcting system is characterized by comprising a luminance detector (7) electrically connected with an LED array (8), and an automatic current detection module (2) arranged in a current path between a power module (1) and the LED array (8), wherein the power module (1) is respectively connected with the current detection module (2) and a signal processing module (4); a path of the luminance detector (7) is provided with a datastorage (6) respectively connected with the current detection module (2) and the luminance detector (7); and the data storage (6), a data processor (5) and the signal processing module (4) are electrically connected in sequence and the signal processing module (4) is connected with the LED array (8) to realize the transmission of signal data of the system. The invention can solve the problem of efficiency drop difference of the LED for long time working, thereby ensuring the quality of the LCD.

Description

technical field [0001] The invention belongs to the field of flat panel display, and relates to a brightness uniformity correction system and a correction method of an LED (light emitting diode) backlight source used in an LCD (liquid crystal display) display device. Background technique [0002] LCD display technology has become the mainstream technology of today's display technology, occupying an increasing proportion of the market, OLED is considered to be the development direction of display technology in the future, and it is also developing rapidly at present, and some products have been sold in the market. [0003] LCD display devices have a wide range of applications and are currently the most widely used display devices. Common applications include: mobile phone display, portable media player, LCD TV, computer monitor, display of various instruments and meters, etc. According to the different light sources used for display, LCD displays can be divided into three ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
Inventor 唐李晟
Owner IRICO
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