Optical film and manufacturing method therefor, anti-glare film, polarizing element with optical layer, and display device

A technology of optical layer and optical film, which is applied in the field of optical film, can solve the problems that are difficult to realize at the same time, and the anti-glare property is reduced.

Inactive Publication Date: 2010-07-14
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the period of the concavities and convexities on the surface of the antiglare layer 112 is increased to obtain gentle (gentle) concavities and convexities, a flat part is formed at the bonding part between the protrusions of the microparticles 113, thereby causing a problem that the antiglare characteristic is lowered.
[0007] As described above, there is a trade-off between the anti-glare characteristic and the clarity of the transmitted image, and it is considered difficult to achieve both characteristics at the same time

Method used

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  • Optical film and manufacturing method therefor, anti-glare film, polarizing element with optical layer, and display device
  • Optical film and manufacturing method therefor, anti-glare film, polarizing element with optical layer, and display device
  • Optical film and manufacturing method therefor, anti-glare film, polarizing element with optical layer, and display device

Examples

Experimental program
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Effect test

no. 1 approach

[0105] (1-1) Structure of liquid crystal display device

[0106] image 3 One example of the structure of the liquid crystal display device according to the first embodiment of the present invention is shown. Such as image 3 As shown, the liquid crystal display device includes a backlight 3 that emits light, and a liquid crystal panel 2 that modulates the light emitted by the backlight 3 in time and space to display images. Polarizers 2a and 2b are provided on both surfaces of the liquid crystal display panel 2, respectively. The anti-glare film 1 is provided on a polarizer 2b provided on the display surface side of the liquid crystal display panel 2 . In the present invention, the polarizer 2 b having the antiglare film 1 or the antiglare layer on one main surface is referred to as an antiglare polarizer 4 .

[0107] For example, a direct type backlight, an edge type backlight, or a flat light source type backlight can be used as the backlight 3 . The backlight 3 includ...

no. 2 approach

[0177] (2-1) Structure of anti-glare film

[0178] Figure 7 One example of the structure of the antiglare film according to the second embodiment of the present invention is shown. Such as Figure 7 As shown, the difference between the anti-glare film 1 of the second embodiment and the first embodiment is that a low-refractive-index layer 14 is further provided on the anti-glare film 12 . Since the base material 11 and the antiglare layer 12 are the same as those in the first embodiment, they are assigned the same reference numerals and their descriptions are omitted.

[0179] Such as Figure 7 As shown, the low refractive index layer 14 is preferably arranged to follow the undulations on the surface of the antiglare layer. More preferably, the low refractive index layer 14 has substantially the same thickness, and the undulations of the surface of the antireflection layer have substantially the same gentle undulations as the undulations of the surface of the antiglare la...

no. 3 approach

[0197] Figure 9 One example of the structure of the antiglare film according to the third embodiment of the present invention is shown. Such as Figure 9 As shown, the difference between the anti-glare film 1 and the above-mentioned first embodiment is that a multi-layer anti-reflection layer is provided on the anti-glare layer 12 . Since the base material 11 and the antiglare layer 12 are the same as those in the first embodiment described above, they are assigned the same reference numerals and their descriptions are omitted.

[0198] The multilayer antireflection layer 16 is a laminated film including a low refractive index layer 16L and a high refractive index layer 16H. Preferably, the lamination number of the low-refractive index layer 16L and the lamination number of the high-refractive index layer 16H are appropriately selected according to required characteristics. Examples of materials that can be used for the low refractive index layer 16L include, but are not p...

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Abstract

Provided is an optical film comprising a substrate and an optical layer formed on the substrate, ein the surface of the optical layer has a concavoconvex shape. The concavoconvex shape is obtained by coating the substrate with a coating material containing microparticles and resin, allowing the convection of the coating material to unevenly distribute the particles, and hardening the coating material. The resin contains from 3 wt% to 20 wt% polymer. The microparticles are organic microparticles having an average particle size of 2 [mu]m to 8 [mu]m. The ratio ((D / T) x 100) of the average particle size (D) of the microparticles to the average film thickness (T) of the optical layer is 20% to 70%. The value of the transmitted image clarity measured using a 0.125-mm wide optical comb is 45 or higher.

Description

technical field [0001] The present invention relates to an optical film and its manufacturing method, an antiglare film, a polarizer with an optical layer, and a display device. In particular, the present invention relates to optical films used in display surfaces of display devices such as liquid crystal display devices. Background technique [0002] In various displays such as a liquid crystal display, a plasma display, and a cathode ray tube display, when external light such as a fluorescent lamp is reflected onto a surface, a problem of a significant decrease in visibility may be caused. Under such circumstances, recently, the following methods have been adopted: a method in which an optical multilayer film or a low-refractive index film is provided on the surface of a display device to reduce reflection, and a method in which a film such as The optical film of the anti-glare film with fine bumps diffusely reflects external light, thereby blurring the reflected image. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02B32B3/30B32B7/02B32B27/18G02B5/30G02F1/1335
CPCG02B5/0226G02B1/11G02B5/0284G02F1/133502G02F2202/36Y10T428/24372G02B5/0278
Inventor 长浜勉芳贺友美松村伸一铃木良
Owner SONY CORP
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