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Liquid crystal display

A technology of liquid crystal display device and liquid crystal layer, which can be used in static indicators, instruments, nonlinear optics, etc., and can solve the problems of thinness, cheapness, and inability to provide

Inactive Publication Date: 2004-05-12
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As described above, the conventional structure cannot provide a thin and cheap liquid crystal display device capable of both main display and sub-display

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The liquid crystal display device of this embodiment will refer to Figure 1A with 1B Describe.

[0028] As shown in the figure, the liquid crystal panel 1 is inserted between the polarizer 2 and the reflective-polarizer 3. The structure of the liquid crystal panel 1 is that a liquid crystal layer is sandwiched between a transparent substrate such as a glass substrate and a plastic substrate. The display electrodes on the transparent substrate provide voltage to the liquid crystal layer, thereby controlling the arrangement of liquid crystal molecules to display images or text. Here, the polarizer has the function of absorbing specific linear polarization components and transmitting other polarization components. Reflection-Polarizer has the function of reflecting specific linear polarization components and transmitting other polarization components. The observation point of the observer on the side of the polarizer 2 is referred to as the first observation point 11, and the...

Embodiment 2

[0033] Reference attached image 3 The liquid crystal device of this embodiment will be described. Similar to Embodiment 1, this description adopts an example of a case where light enters from the side of the polarizer 2. The points that have been described in Embodiment 1 will not be repeated.

[0034] As shown in the figure, in this embodiment, the liquid crystal display panel 1 is inserted between the polarizer 2 and the second polarizer 4, and the reflection-polarizing plate 3 is placed between the liquid crystal panel 1 and the second polarizer 4. Here, the reflection axis of the reflection-polarizing plate 3 is set to be parallel to the polarization axis of light that has passed through the power-off region of the liquid crystal panel 1. Similarly, the direction of the reflection axis of the reflection-polarizer 3 is the same as the direction of the absorption axis of the second polarizer 4.

[0035] When the display panel is viewed from the first observation point, the desc...

Embodiment 3

[0040] The liquid crystal display device of this embodiment will be described with reference to FIG. 4. Similar to the above-mentioned embodiment, this description adopts an example of a case where light enters from the side of the polarizer 2. The points that have been described in the above embodiments will not be repeated.

[0041] As shown in the figure, in this embodiment, the liquid crystal display panel 1 is inserted between the polarizer 2 and the reflective-polarizing plate 3, and the diffusion layer 5 is placed between the liquid crystal panel 1 and the reflective-polarizing plate 3. Here, the reflection axis of the reflection-polarizing plate 3 is set to be parallel to the polarization axis of light that has passed through the power-off region of the liquid crystal panel 1. Moreover, the diffusion layer has a function of scattering light in a specific area when light is transmitted through the diffusion layer.

[0042] With such a diffusion layer, the light scattered by...

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PUM

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Abstract

To realize at low cost a liquid crystal display device which is thin and in which display on a single liquid crystal panel can be viewed in both ways, from the front and from the back. The liquid crystal display device includes a liquid crystal panel in which a liquid crystal layer is interposed between opposing substrates, and a polarizer and a reflection-polarizing plate provided so as to interpose the liquid crystal panel therebetween. The reflection axis of the reflection-polarizing plate is set in the same direction as a polarization direction of light that exits the liquid crystal panel after its polarization direction is changed in the liquid crystal layer, or a polarization direction of light that exits the liquid crystal panel without being changed in polarization direction in the liquid crystal layer. Due to this arrangement, a liquid crystal display device can be provided which is thin and capable of displaying on both the front side and the back side.

Description

Technical field [0001] The present invention relates to a liquid crystal display device used in timing parts, cellular phones, audio systems and other electronic equipment, and the display device allows an observer to observe the display from the front and back. Background technique [0002] In recent years, liquid crystal display devices characterized by thinness and light weight have been widely used in portable devices and the like. In particular, cellular phones that are required to be small in size and weight have almost always used such liquid crystal display devices as their display devices. However, the liquid crystal display device is a light-receiving type and cannot provide sufficient visibility in a dark place, which is one of the requirements of cellular phones. This problem is often solved by installing a lighting device on the front or back of the liquid crystal display device. Generally, the former lighting device is called a front light, and the latter is called ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/1335G02F1/13357
CPCG02F1/133504G02F2001/133616G02F1/133536G02F2001/133342G02F1/133342G02F1/133616G02F1/1335
Inventor 山内直史栗原慎
Owner SEIKO INSTR INC