Liquid crystal display device

A liquid crystal display and device technology, applied in the field of liquid crystal display devices, can solve problems such as chromaticity shift, color balance change, and backlight brightness reduction, and achieve the effect of suppressing changes

Inactive Publication Date: 2008-07-02
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although backlights using organic EL devices are being improved, however, the backlights have a problem in that, compared with backlights using cold-cathode tubes, the brightness of the backlight is greatly reduced and the color balance is also deteriorated when light is emitted for a long time. There is a large change (chroma shift)

Method used

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Embodiment Construction

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in all the drawings of the following embodiments, the same or corresponding parts are denoted by the same reference numerals and symbols.

[0020] FIG. 1 shows a cross section describing an exemplary configuration of a liquid crystal display device according to a first embodiment of the present invention. A liquid crystal display device 1 mainly has: a transmissive liquid crystal panel 10 for displaying images, a backlight 20 as a light source, a photosensor 3 for detecting components of light emitted from the backlight 20, a circuit 4 containing brightness and chromaticity correction, and a circuit provided on a substrate 7. IC (Integrated Circuit) of the liquid crystal panel driving circuit 5, and the power supply part 6 driving the backlight 20. Furthermore, in FIG. 1 , connections between the backlight 20 , the power supply portion 6 and the substrate 7 ...

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Abstract

A liquid crystal display device is disclosed. The device includes: a light source using an organic electroluminescent device that emits almost white light; a liquid crystal display section configured to modulate light from the light source according to a video signal and display an image; a chromaticity detection section configured to detect the degree of light from the light source Chromaticity; correcting means for correcting the chromaticity of an image to be displayed on the liquid crystal display part, wherein said correcting means compares the chromaticity detected in said chromaticity detection part with a reference chromaticity, and based on the comparison The result is correction of at least one video signal among the red, green and blue video signals of the three primary colors.

Description

technical field [0001] The present invention relates to a liquid crystal display device using an organic electroluminescent device as a backlight of a liquid crystal display panel. Background technique [0002] Cold-cathode tubes (fluorescent lamps) are usually used as backlights for LCD panels. Cold-cathode tubes have advantages in terms of power consumption, working life, and cost. However, cold-cathode tubes use mercury as a material. Therefore, replacement light source devices must be introduced to prevent environmental pollution when they are scrapped. Since organic electroluminescent devices (hereinafter referred to as organic EL devices) have characteristics that the devices are driven at low voltage and have excellent color reproducibility, backlights using organic EL devices have been actively developed in recent years. . [0003] In liquid crystal display devices, light emitted from a backlight is generally used as white light. Therefore, in the case of using an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36G09G3/20G09G5/02G02F1/13357G02F1/1335
CPCG02F1/13318G02F1/133603G02F2202/02G09G3/3406G09G3/3426G09G3/3611G09G2320/0646G09G2320/0666G09G2360/145G02F1/133
Inventor 广瀬阳一田豪
Owner SONY CORP
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