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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: 2009-06-24
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
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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)-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., Ltd.) for epi-r...

Embodiment 2

[0264] Figure 9 It 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 between the lamination of each film and the axial direction is as follows Figure 9 and shown in 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 side...

Embodiment 3

[0275] Figure 10 It 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 between the lamination of each film and the axial direction is as follows Figure 10 and shown in Table 3.

[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 crysta...

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Abstract

The present invention provides a display device that can be improved at least in a specific direction without changing the design of the basic structure of the display device, without being limited by a white display state or a black display state, and without impairing display quality in other directions. Viewing angle dependence of contrast ratio. The above-mentioned display device comprises a display device whose contrast ratio has viewing angle dependence, and an anisotropic scattering film having an anisotropic scattering layer, wherein the above-mentioned anisotropic scattering film is inclined at a certain angle from a normal direction of an observation surface of the display device. The contrast ratio in the rear direction substantially coincides with the direction in which the contrast ratio takes an extreme value, has a scattering central axis, and is arranged on the viewing surface side of the display device.

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 Patents(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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