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Liquid crystal display device

A liquid crystal display device, liquid crystal cell technology, applied in the directions of instruments, polarizing elements, optics, etc., can solve the problem of not giving any suggestions, etc., and achieve the effects of less environmental dependence of optical performance, simple method, and reduced color shift

Inactive Publication Date: 2010-10-06
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no suggestion is made regarding the relationship between the arrangement position of the protective film in the liquid crystal display device and the display performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1-1 and 1-2

[0115] A VA (Vertical Alignment) liquid crystal display device according to Embodiment 1-1 of the present invention, comprising at least: a light source, a liquid crystal cell including a pair of substrates and a liquid crystal layer interposed between the substrates, and a film containing a thermoplastic resin composition , the thermoplastic resin composition contains a lactone ring-containing polymer. The film is arranged on the side of the liquid crystal cell closer to the light source. Regarding the film containing the thermoplastic resin composition containing a lactone ring-containing polymer, reference can be made to the description of "thermoplastic resin film containing a lactone ring-containing polymer" in the optical compensation sheet described later.

[0116] "The film is disposed on the light source side of the liquid crystal cell" means that when one or more film layers are provided on the light source side of the liquid crystal cell, the thermoplastic resin com...

Embodiment approach 2-1 and 2-2

[0357] The VA (Vertical Alignment) liquid crystal display device according to Embodiment 2-1 of the present invention includes: a liquid crystal cell, two polarizers arranged outside the liquid crystal cell, and a liquid crystal cell arranged between the two polarizers The optically anisotropic layer in either of the two spaces of . The optically anisotropic layer contains a lactone ring-containing polymer, and the in-plane retardation Re and the thickness direction retardation Rth of the optically anisotropic layer satisfy the following formulas (A) and (B),

[0358] (A)40nm≤Re(550)≤275nm

[0359] (B)0nm≤Rth(550)≤275nm

[0360] Where Re(550) and Rth(550) represent in-plane retardation (nm) and thickness direction retardation (nm) at a wavelength of 550 (nm).

[0361] The VA (Vertical Alignment) liquid crystal display device according to Embodiment 2-2 of the present invention includes: a liquid crystal cell, two polarizers arranged outside the liquid crystal cell, and a liq...

Embodiment 1-1～1-8

[0586] The layer structure of a liquid crystal display device using a lactone film on the side closest to the light source when viewed from the liquid crystal cell is shown in Figure 5 . A TAC film is used in each optically anisotropic layer.

[0587] The front and back polarizers and optical compensatory sheets of the VA mode liquid crystal TV (LC30-AD1, manufactured by Sharp Corporation) panel were peeled off, and the polarizer made was bonded so that the transmission axis of the polarizer was in the vertical direction of the screen on the observation side, And the transmission axis of the polarizer is in the horizontal direction of the screen on the light source side.

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Abstract

This invention provides a liquid crystal display device which is excellent in both display performance and moist heat resistance. The liquid crystal display device comprises a light source, a liquid crystal cell comprising a pair of substrates and a liquid crystal layer held between the pair of substrates, and a film containing a thermoplastic resin composition containing a lactone ring-containing polymer. The film is disposed in the liquid crystal cell on its side near the light source. The liquid crystal display device is characterized in that it includes a film containing a thermoplastic resin composition containing a lactone ring-containing polymer, the in-plane retardation (Re) and the through-thickness retardation (Rth) of the film are each not more than 10 nm, and an optically anisotropic layer is provided on the film.

Description

technical field [0001] The invention relates to a liquid crystal display device. Background technique [0002] Liquid crystal display devices are widely used as displays for personal computers and portable devices and for televisions due to their various advantages, such as low voltage, low power consumption, and ability to be miniaturized and thinned. Various modes of liquid crystal display devices have been proposed by the alignment state of liquid crystals in liquid crystal cells. [0003] In various liquid crystal display devices, a phase difference plate (retardation plate) is conventionally used for optical compensation. As the phase difference plate, for example, optical biaxial phase difference plates are exemplified, and these phase difference plates can be mainly produced by various polymer film stretching methods such as inter-roll stretching method, inter-roll compression stretching method and tenter machine transverse single-stretching method. It is prepared b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13363G02B5/30
CPCG02B5/3083G02F1/133528G02F2201/50
Inventor 大桥祐介矢内雄二郎中山元
Owner FUJIFILM CORP
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