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Display device

A technology for display devices and display devices, which can be used in identification devices, static indicators, optics, etc., and can solve problems such as degradation of display quality

Active Publication Date: 2007-08-29
SHARP KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In this way, in the conventional light control sheet, the anisotropic scattering characteristic (the characteristic that the scattering characteristic changes when the incident angle is changed) can only be obtained in a specific orientation, so the viewing angle-dependent improvement effect can only be obtained in a specific orientation, Light incident from an oblique direction in other directions is scattered almost uniformly regardless of the incident angle, so the display quality in other directions will deteriorate, and there is room for improvement in this regard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0236] (Fabrication of the first anisotropic scattering film)

[0237] First, a polyethylene terephthalate (PET) film (trade name: COSMOSHINE (registered trademark), model: A4300, manufactured by Toyobo Co. ) after the liquid resin was ejected from the edge portion, the liquid resin was solidified to form a partition wall with a height of 0.2 mm. Then, after dropping the photopolymerizable composition of the following composition in the area|region surrounded by a partition, it covered with another PET film.

[0238] "Composition of Photopolymerizable Composition"

[0239] 2-(perfluorooctyl (perfluorooctyl))-ethyl acrylate 50 parts by weight

[0240] 1,9-nonanediol diacrylate 50 parts by weight

[0241] 2-Hydroxy-2-methyl-1-phenylpropan-1-one 4 parts by weight

[0242] Afterwards, for the liquid film with a thickness of 0.2mm sandwiched between the upper and lower sides by the PET film, the UV spot light source (trade name: L2859-01, manufactured by Hamamatsu Photonics Co....

Embodiment 2

[0264] FIG. 9 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 relationship between the lamination of each film and the axial direction is shown in Figure 9 and Table 2.

[0265] [Table 2]

[0266] Components

Azimuth Φ

The first anisotropic scattering film 10a (the axis of the scattering central axis

Azimuth S 1 )

90 degrees

Polarizer 3a-observation side (absorption axis a)

0~180 degrees

Second retardation film 12b (slow axis s)

90~270 degrees

VA mode liquid crystal cell 11a (tilt orientation of liquid crystal molecules)

45, 135, 225, 315 degrees

3rd retardation film 12c (slow axis s)

0~180 degrees

Polarizing element 3a - back side (absorption axis a)

90~270 degrees

[0267] (Fabrication of VA Mode Liquid Crystal Display Device 15a)

[0268] First, the support film on the s...

Embodiment 3

[0275] FIG. 10 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. Figure 10 and Table 3 show the relationship between the lamination of each film and the axial direction.

[0276] [table 3]

[0277] Components

Azimuth Φ

The first anisotropic scattering film 10a (the axis of the scattering central axis

Azimuth S 1 )

90 degrees

1st polarizer 13a-observation side (absorption axis a)

0~180 degrees

VA mode liquid crystal cell 11a (tilt orientation of liquid crystal molecules)

45, 135, 225, 315 degrees

4th retardation film 12d (slow axis s)

0~180 degrees

1st polarizer 13a-back side (absorption axis a)

90~270 degrees

[0278] (Fabrication of VA Mode Liquid Crystal Display Device 15a)

[0279] First, the 4th retardation film 12d is pasted on the backlight side of the VA mode liquid crystal cell 1...

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Abstract

The present invention provides a display which can improve viewing angle dependency of a contrast ratio at least in a specific azimuth without design change of a basic structure of a display element, limitation to white display state or black display state, and deterioration in display quality in other directions. The above-mentioned display is a display comprising: a display element with a contrast ratio dependent on a viewing angle; and an anisotropic scattering film having an anisotropic scattering layer, wherein the anisotropic scattering film is located on a viewing screen side of the display element and has a scattering central axis in substantially the same azimuth as an azimuth in which a contrast ratio of the display element in a direction inclined by a certain angle from a normal direction of a viewing screen of the display element has an extreme value.

Description

technical field [0001] The invention relates to a display device. More specifically, it relates to a display device including a display device such as a liquid crystal display device and an anisotropic scattering film. Background technique [0002] A liquid crystal display device represented by a twisted nematic (Twisted nematic: TN) mode is known as a typical example of a display device whose display performance has viewing angle dependence (viewing angle characteristic). The so-called "display performance has viewing angle dependence" refers to the situation observed from the front direction (the normal direction of the viewing surface of the display device, the direction where the viewing angle is 0 degrees) and the situation observed from an oblique direction (the direction where the viewing angle is greater than 0 degrees) Under different conditions, the display performance such as contrast ratio (contrast ratio), gradation characteristics, and chromaticity are differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/133G09F9/35G09F9/00
Inventor 长谷川雅浩坂井彰东健策元田泰彦片桐裕人
Owner SHARP KK
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