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Semi-transmission reflection type colour liquid crysta display

A liquid crystal display device and liquid crystal layer technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of difficult display quality, difficult color display quality, etc., and achieve the effects of easy manufacturing, good contrast, and high contrast.

Active Publication Date: 2004-10-06
ORTUS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In (Japanese) Unexamined Patent Publication No. 2000-111902, a partial reflective transmissive type in which a reflective part and a transmissive part are provided in one pixel is also proposed, but these transflective reflective liquid crystal display devices have difficulties in both reflective display and transmissive display. Issues with getting good display quality in both transmissive displays
[0006] As described above, it is extremely difficult to obtain good color display quality that fully ensures the required light intensity, saturation, and contrast in both reflective display and transmissive display using a transflective color liquid crystal display device.

Method used

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  • Semi-transmission reflection type colour liquid crysta display
  • Semi-transmission reflection type colour liquid crysta display
  • Semi-transmission reflection type colour liquid crysta display

Examples

Experimental program
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no. 1 Embodiment

[0063] according to figure 1 and figure 2 A liquid crystal display device according to a first embodiment of the present invention will be described. figure 1 is an exploded perspective view of the liquid crystal display device of this embodiment, figure 2 It is a schematic cross-sectional view of its main structure.

[0064] The liquid crystal display device of the present embodiment is a transflective color liquid crystal display device used as a display of a mobile phone, such as figure 1 As shown, it is composed of a liquid crystal display element 100 and a surface light source backlight 200 disposed on the rear side (the side opposite to the observation side). The liquid crystal display element 100 is composed of a liquid crystal cell 10, a front polarizing plate 20 arranged on the front side of the liquid crystal cell 10 (displaying viewing side), a rear polarizing plate 30 arranged on the rear side, and a set between the liquid crystal cell 10 and the front polariz...

no. 2 Embodiment

[0117] Next, a second embodiment of the present invention will be described with reference to FIG. 5 . In the following embodiments, the same reference numerals are attached to the same components as those in the above-mentioned first embodiment, and description thereof will be omitted.

[0118] In the liquid crystal display device of this example, in the liquid crystal display device of the first embodiment, in the area of ​​the inner surface of the front transparent substrate 1 excluding the transmissive sections 13, at least the areas corresponding to the reflective sections 12 are respectively arranged. The liquid crystal layer thickness adjustment layer 14 covers these liquid crystal layer thickness adjustment layers 14 , and the color filter layer 9 is laminated on substantially the entire area of ​​the inner surface of the front transparent substrate 1 .

[0119] The liquid crystal layer thickness adjustment layer 14 of this example is also the same as the liquid crysta...

no. 3 Embodiment

[0128] Next, according to Image 6 A third embodiment of the present invention will be described.

[0129] The liquid crystal display device of this example is a transflective color liquid crystal display device of a simple matrix type, and the liquid crystal layer 3 is composed of STN (SuperTwisted Nematic: Super Twisted Nematic) type liquid crystal with a twist orientation angle as large as 180° to 360°.

[0130] On the inner surface side of the front side transparent substrate 1, a plurality of strip-shaped scan electrodes 16 are extended in parallel, and on the inner surface of the back side transparent substrate 2, a plurality of strip-shaped scan electrodes 16 are extended in parallel to the direction perpendicular to the scan electrodes 16. A signal electrode 17. Therefore, the pixel regions 11 formed on the portions where the electrodes 16 and 17 face each other are arranged in a matrix.

[0131] Between the rear transparent substrate 2 and the signal electrodes 17, ...

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Abstract

A color filter constituted by red, green, and blue color filter elements is formed on an internal surface of a front transparent substrate. A reflective film is provided on a part corresponding to approximately a half of a pixel area on an internal surface of a back transparent substrate. The half of the pixel area on which the reflective film is provided is a reflective portion, and approximately the other half is a transmissive portion. An inter-substrate gap and a thickness of the color filter in the transmissive portion are set such that transmissive display achieving high luminance and high contrast can be realized. A thickness of the color filter and the thickness of a liquid crystal layer in the reflective portion are set to optimal values so that reflective display achieving high contrast can be realized, by adjusting a thickness of a liquid crystal layer thickness adjusting layer.

Description

technical field [0001] The present invention relates to a liquid crystal display capable of both transmissive display and reflective display. Background technique [0002] In recent years, transflective liquid crystal display devices have been used as displays suitable for portable devices such as mobile phones and portable information terminals. This transflective liquid crystal display device uses the external light obtained from the use environment such as natural light or indoor lighting to reflect the display, and switches to the built-in lighting device for transmission in the place where the external light is weak. It shows that the power consumption of the lighting device is kept to a minimum. [0003] This transflective liquid crystal display device is provided with the viewing side of the liquid crystal unit of the transflective layer, that is, the front side, and the opposite side, that is, the rear side. Polarizers are respectively provided as liquid crystal dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333G02F1/1335
CPCG02F1/133371G02F1/1335G02F1/1333G02F1/133514G02F1/133555
Inventor 荒井则博铃木刚西野利晴小林君平
Owner ORTUS TECH
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