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Gradation voltage correction system and display apparatus utilizing the same

一种灰度电压、显示装置的技术，应用在静态指示器、仪器等方向，能够解决显示品质降低、不能完全抑制色度变化、无法防止显示品质等问题，达到防止显示品质降低的效果

Inactive Publication Date: 2013-07-03
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, depending on the degree of coloring on the casing such as the above-mentioned yellowing, if only the current values ​​supplied to the RGB LEDs are increased or decreased, the chromaticity change of the illumination light may not be sufficiently suppressed. The degradation of display quality cannot be prevented in liquid crystal display devices
[0009] In addition, when a light source emitting monochromatic light (white light) such as a cold-cathode tube or a white light-emitting diode is used for the backlight device, even if the current value supplied to the light source is increased or decreased as in the above-mentioned conventional liquid crystal display device, Chromaticity changes caused by aging of the light source, etc. cannot be completely suppressed
Therefore, in the conventional liquid crystal display device, when a light source emitting white light is used for the backlight device, when the chromaticity of the illuminating light changes due to aging of the light source, etc., it is impossible to prevent the chromaticity of the illuminating light from changing. The degradation of display quality caused by

Method used

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  • Gradation voltage correction system and display apparatus utilizing the same
  • Gradation voltage correction system and display apparatus utilizing the same
  • Gradation voltage correction system and display apparatus utilizing the same

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no. 1 Embodiment approach

[0046] figure 1 It is a schematic diagram explaining the gradation voltage correction system and the liquid crystal display device according to the first embodiment of the present invention, figure 2 yes means figure 1 A top view of the structure of the main parts of the shown backlight device. figure 1 and figure 2 Among them, in the liquid crystal display device 1 of the present embodiment, a backlight unit 2 and a liquid crystal panel 3 serving as a display portion that is irradiated with light from the backlight unit 2 and displays information are provided. The panel 3 is integrated as the transmissive liquid crystal display device 1 .

[0047] The backlight unit 2 has a plurality of light emitting diodes 4 as light sources, a light guide plate 5 that introduces light from the plurality of light emitting diodes 4, and a reflection sheet 6 that is arranged on the non-liquid crystal panel 3 side of the light guide plate 5, and is viewed from the light guide plate. 5. I...

no. 2 Embodiment approach

[0074] Figure 5 It is a schematic diagram explaining the gradation voltage correction system and the liquid crystal display device according to the second embodiment of the present invention. In the drawing, the main difference between the present embodiment and the above-mentioned first embodiment is that the color sensor is provided on the display surface side of the liquid crystal panel. In addition, the same code|symbol is attached|subjected to the same element as the said 1st Embodiment, and the overlapping description is abbreviate|omitted.

[0075] That is, if Figure 5 As shown, in the liquid crystal display device 1 of the present embodiment, the backlight unit 2 , the liquid crystal panel 3 , and the like are housed inside the outer frame 20 serving as a housing. also, Figure 5 In order to simplify the drawings, illustrations of the FPC 10, the drive control circuit 11, and the lighting drive circuit 12 are omitted (shown later) Figure 6 , Figure 7 ,and Fi...

no. 3 Embodiment approach

[0079] Figure 6 It is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a third embodiment of the present invention. In the figure, the main difference between this embodiment and the above-mentioned second embodiment is that the color sensor is arranged outside the outer frame. In addition, the same code|symbol is attached|subjected to the same element as the said 2nd Embodiment, and the overlapping description is abbreviate|omitted.

[0080] That is, if Figure 6 As shown, in the liquid crystal display device 1 of the present embodiment, the backlight unit 2 , the liquid crystal panel 3 , and the like are housed inside the outer frame 30 serving as a housing. In addition, in the liquid crystal display device 1 of the present embodiment, unlike the second embodiment, a configuration is adopted in which the reflective sheet 6' having the opening 6'a formed in the center is used so that the reflection sh...

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Abstract

A gradation voltage correction system (14b) is provided in a liquid crystal display device (1) that is configured to be capable of displaying a color image, and corrects gradation voltages to be supplied to a plurality of pixels. The gradation voltage correction system (14b) includes a color sensor (chromaticity change acquiring portion) (13) for acquiring a change in chromaticity of illumination light from light-emitting diodes (4) and a correction determining portion (14c) for determining correction values of the gradation voltages for each color of the red, green, and blue pixels based on the detection (acquisition) results of the color sensor (13).

Description

technical field [0001] The present invention relates to a gray-scale voltage correction system for correcting gray-scale voltages corresponding to information to be displayed, and particularly to a gray-scale voltage correction system used in a non-luminous display device capable of performing color display, and the use of the gray-scale voltage correction system. A display device for a gray scale voltage correction system. Background technique [0002] In recent years, for example, liquid crystal display devices have been widely used in liquid crystal televisions, monitors, mobile phones, and the like as flat panel displays that are lighter and thinner than conventional cathode ray tubes. Such a liquid crystal display device includes a backlight device that emits light, and a liquid crystal panel that functions as a shutter for light from a light source provided in the backlight device, thereby displaying a desired image. [0003] In addition, as the above-mentioned backli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
CPCG09G2360/145G09G2320/043G09G2320/041G09G2320/0285G09G2320/0666G09G3/3413
Inventor 太田裕己滨田哲也
Owner SHARP KK
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