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Linear correction method of LED dynamic backlight

A dynamic backlight and linear correction technology, applied in the field of correction, can solve the problems of non-linearity, non-linearity of backlight data value and actual display brightness, etc.

Inactive Publication Date: 2010-07-28
IRICO
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a linear correction method for LED dynamic backlight, which corrects the backlight data value and the actual display brightness to be linear, and solves the problem of non-linearity between the backlight data value and the actual display brightness.
Through this linear correction method, the linear corresponding relationship between the backlight data and the brightness is obtained, and this relationship is fixed in the look-up table, which effectively solves the problem of non-linearity between the backlight data value and the actual display brightness when the LED dynamic backlight is used.

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Embodiment Construction

[0021] Table 1 is the schematic data of the brightness value corresponding to the measured backlight data value;

[0022] backlight

data

value

0

13

25

38

51

64

76

89

102

115

128

brightness

0

8.14

22.84

37.65

50.79

58.11

65.27

72.32

79.22

85.46

87.66

backlight

data

value

140

153

166

179

191

204

217

230

242

255

brightness

90.85

96.7

103.5

107.8

112.5

118

125.5

128.9

131.9

133.9

[0023] Table 1 shows the gray levels of 0, 13, 25, 38, 51, 64, 76, 89, 102, 115, 128, 140, 153, 166, 179, 191, 204, 217, 230, 242 and 255, a total of 21 pure white images, and the table made after measuring the brightness of each image.

[0024] refer...

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Abstract

The invention discloses a linear correction method of LED dynamic backlight, comprising the following steps of: measuring the liquid crystal display brightness of backlight at each gray value; drawing a curve of the backlight gray values and the liquid crystal display brightness; reading the maximum value of the liquid crystal display brightness; carrying out 256 even division on the liquid crystal display brightness from 0 to the maximum value; reading the backlight gray value corresponding to each even division brightness from the curve; manufacturing a lookup table according to the obtained 256 backlight gray values; and correcting the output backlight brightness values by utilizing the lookup table. In the invention, the linear corresponding relation between the backlight data and brightness is obtained by the linear correction method, and the relation is fixed in the lookup table, thereby effectively solving the disadvantage that the relation between the backlight data value and the actual display brightness is not the linear relation when in LED dynamic backlight.

Description

technical field [0001] The present invention relates to a calibration method, in particular to a linear calibration method for LED dynamic backlights, Background technique [0002] Compared with the LCD with CCFL cold cathode fluorescent lamp as the backlight, the LCD with LED dynamic backlight has the advantages of environmental protection, health, power saving and energy saving, strong color performance and long service life. With dynamic backlight, the brightness and darkness of the backlight will change dynamically with the change of the image, and the processing of the image display effect is also concentrated on the processing of the backlight data, and the display requirements for adjusting the brightness can be achieved by processing the backlight data. However, the processing of the backlight data is based on the precondition that the backlight data is linear to the actual display brightness. If linearity correction is not performed, the processing of backlight dat...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 郑志华
Owner IRICO
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