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Display

A technology of display device and display device, which is applied in the direction of identification device, static indicator, instrument, etc., to achieve the effect of improving viewing angle dependence and high display quality

Active Publication Date: 2007-03-28
SHARP KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In this way, in the conventional light control panel, since the anisotropic scattering characteristic (the characteristic that the scattering characteristic changes when the incident angle is changed) can be obtained only in a specific direction, although the decrease in the contrast ratio in the front direction can be somewhat prevented, However, there is still room for improvement in that the viewing angle-dependent improvement effect can only be obtained in a specific orientation.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0117] (Fabrication of the first anisotropic scattering film)

[0118] First, a polyethylene terephthalate (PET) film with a thickness of 75 μm and a size of 76 × 26 mm (trade name: Cosmoshine (registered trademark), part number: A4300, manufactured by Toyobo Co., Ltd. ) was ejected from the edge portion of the liquid resin, and then the liquid resin was solidified to form partition walls with a height of 0.2 mm. Next, after dropping the photopolymerizable composition of the following composition into the area|region surrounded by a partition, it covered with another PET film.

[0119] "Composition of Photopolymerizable Composition"

[0120] 2-(perfluorooctyl)-ethyl acrylate 50 parts by weight

[0121] 1,9-nonanediol diacrylate 50 parts by weight

[0122] 2-Hydroxy-2-methyl-1-phenylpropan-1-one 4 parts by weight

[0123] Afterwards, for the liquid film with a thickness of 0.2mm sandwiched by the PET film, it was vertically irradiated for one minute from the reflection irra...

Embodiment 2

[0138] 7 is a schematic perspective view showing the configuration of a VA-mode liquid crystal display device 100a according to Embodiment 2 of the present invention. The relative relationship such as the lamination axis direction of each film is shown in FIG. 7 .

[0139] First, on the observation surface side of the VA mode liquid crystal cell 11a trial-produced in Example 1, the support film on the side of the VA mode liquid crystal cell 11a was pasted as the second polarizing plate 13b of the second retardation film 12b, and on the backlight side, affixed The support film on the side of the VA-mode liquid crystal cell 11a serves as the third polarizing plate 13c of the third retardation film 12c, and constitutes the VA-mode liquid crystal device 15a. Next, the same first anisotropic scattering film 10a as in Example 1 was bonded to the viewing surface side of the VA-mode liquid crystal display device 15a to constitute the VA-mode liquid crystal display device 100a.

[014...

Embodiment 3

[0142] 8 is a schematic perspective view showing the configuration of a VA-mode liquid crystal display device 100a according to Embodiment 3 of the present invention. The relative relationship such as the lamination axis direction of each film is shown in FIG. 8 .

[0143] First, on the backlight side of the VA-mode liquid crystal cell 11a trial-produced in Example 1, the fourth retardation film 12d was pasted, and then the backlight side of the fourth retardation film 12d and the viewing surface side of the VA-mode liquid crystal cell 11a were bonded. The protective film on the side of the VA-mode liquid crystal cell 11a is bonded to the first polarizing plate 13a of a TAC film to form a VA-mode liquid crystal device 15a. Next, the same first anisotropic scattering film 10a as in Example 1 was bonded to the viewing surface side of the VA-mode liquid crystal display device 15a to constitute the VA-mode liquid crystal display device 100a.

[0144] The normal direction of the f...

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Abstract

The invention aims at providing a display which can improve viewing angle dependency of contrast ratio in a wide azimuth without changing design of a basic structure of a display element, impairing display quality in a direction showing large contrast ratio and being limited to a state of displaying white or black. The aim is attained by a display comprising: a display element having viewing angle dependency of contrast ratio; and an anisotropic scattering film having an anisotropic scattering layer, wherein the anisotropic scattering film has a scattering central axis approximately parallel to a direction showing the largest contrast ratio of the display element and is located on a viewing screen side of the display element.

Description

technical field [0001] The invention relates to a display device. Specifically, it relates to a display device such as a liquid crystal display device provided with an anisotropic scattering film. Background technique [0002] As a typical example of a display device whose display performance has viewing angle dependence (viewing angle characteristic), a liquid crystal display device represented by a twisted nematic (Twisted nematic; TN) mode is widely known. In addition, the so-called "display performance has viewing angle dependence" means that when viewed from the front direction (the normal direction of the viewing surface of the display device, the direction with a viewing angle of 0 degrees) is different from that observed from an oblique direction (a direction with a viewing angle greater than 0 degrees) In the case of observation, the display performance such as contrast ratio, gradation characteristics, and chromaticity are different. Generally, it is known that t...

Claims

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Application Information

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IPC IPC(8): G02F1/133G09F9/35
Inventor 长谷川雅浩坂井彰东健策片桐裕人
Owner SHARP KK
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