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Color filter and liquid crystal display device

A color filter, red filter technology, applied in instruments, filters, optics, etc., can solve problems such as inability to white color reproducibility and brightness improvement

Inactive Publication Date: 2009-09-02
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the case of a color liquid crystal display device, the color reproducibility of each of red, green, and blue is important, but the color reproducibility and brightness (Y value) of white are also important. If the color reproducibility cannot be achieved, the color reproducibility and brightness (Y value) of white cannot be improved

Method used

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  • Color filter and liquid crystal display device
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  • Color filter and liquid crystal display device

Examples

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Embodiment 1～16 and comparative example 1～7

[0106] A black matrix was patterned on a glass substrate, and the red coloring composition shown in Table 6 and Table 7 was coated on the substrate with a spin coater to form a coating film of the red coloring composition. Irradiate the film with 300mJ / cm through a photomask using an ultra-high pressure mercury lamp 2 of ultraviolet light. Then spray development with an alkaline developer containing 2% sodium carbonate aqueous solution to remove unexposed parts, then wash with ion-exchanged water, and heat the substrate at 230°C for 20 minutes to form the film thickness shown in Table 9 and Table 10. red filter section. In the same way, the green coloring compositions shown in Table 6 and Table 7 are coated, and after being irradiated with ultraviolet rays through a photomask, they are developed to form the green filter with the film thickness shown in Table 9 and Table 10 on the right side of the red filter section. festival. Next, apply the blue coloring composition shown...

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Abstract

A color filter has red, green, and blue filter segment pixels on a substrate. When a pseudo-white LED having a particular spectral characteristic is used as a light source, the red, green, blue filter segment and the chromaticity points in the CIE table color system of the red, green, blue filter segments are (xR, yR), (xG, yG), (xB, yB), respectively: the area of the triangle defined by these three points on the x-y chromaticity diagram are 72% or above of the area of a reference triangle defined by the three points: red (0.67, 0.33), green (0.21, 0.71), blue (0.14, 0.08); the color temperature is not lower than 6000K; and the filter segment of the red, green, blue filter segments have a film thickness not greater than 3.3 [mu]m. The liquid crystal display device includes the color filters and the pseudo-white LED.

Description

technical field [0001] The present invention relates to a color filter used in a color liquid crystal display device and the like, and a liquid crystal display device having the color filter. Background technique [0002] In recent years, color liquid crystal displays have been used in monitors of personal computers (PCs), displays of mobile phones, notebook PCs, and personal digital assistants due to their advantages of low power consumption and space saving. In recent years, it has also been used in LCD TVs to replace existing cathode ray tube TVs. [0003] In liquid crystal television applications, color reproducibility is valued. The color reproducibility of a color liquid crystal display device is determined by the color of light emitted from the red, green, and blue filter segments. When the chromaticity points of various filter segments are respectively (x R ,y R ), (x G ,y G ), (x B ,y B ), the evaluation is performed by the area of ​​the triangle defined by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/22G02B5/20G02F1/1335
CPCG02F1/133603G02F1/133514G02B5/00G02B5/22G02F1/1335
Inventor 山田和则狩野贵志田中英世宫川章乃大熊聪清水美绘系井健
Owner TOYO INK SC HOLD CO LTD