Antireflective film, polarized light plate and image display device
A technology of anti-reflection film and refractive index, which can be used in identification devices, door/window protection devices, optics, etc., and can solve problems such as reducing bright spots and foreign objects
Inactive Publication Date: 2010-12-01
KONICA MINOLTA OPTO
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Problems solved by technology
However, even if it is produced in a clean room, the number of foreign matter will not be reduced below a certain number, so there is a problem of reducing bright spot foreign matter
Method used
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Embodiment 1
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Embodiment 3
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Abstract
In the antireflection film formed by applying a clear hard coat layer, a middle refractive index layer, the high refractive index layer and a low refractive index layer on a transparent supporting body, it is characterized that the high refractive index layer has a composition which uses titanium oxide particulates and a binder as main components, refractive index of 1.70 to 1.85 and film thickness of 40 to 70 nm. So that, this invention provides an antireflection film which is in contact with a conveyance roller at a state that the maximum surface becomes a high refractive index layer, with which a bright spot foreign matter is reduced even if winding is performed once, at a low cost and with low refractive index, a polarizing plate using the film and an image display device using the plate.
Description
Anti-reflection film, polarizing plate, and image display device technical field The present invention relates to an antireflection film, a polarizing plate, and an image display device with less bright spots and foreign matter. Background technique Antireflection films are provided in various image display devices such as liquid crystal display devices, plasma display panels, electroluminescent displays, or cathode tube display devices. As an antireflection film, a multilayer film in which transparent thin films of metal oxides are laminated has conventionally been generally used. The reason for using a plurality of transparent films is to prevent reflection of light in the long wavelength region of the visible region as much as possible. The transparent thin film of metal oxide can be formed by a chemical vapor deposition (CVD) method, a physical vapor deposition (PVD) method, particularly a vacuum vapor deposition method or a sputtering method which are one of the phys...
Claims
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IPC IPC(8): G02B5/30G09F9/00G02B1/11G02F1/1335G02B1/10
CPCE06B9/36E06B9/78
Inventor 榑松雅行涩江俊明泷本正高斋藤浩一冈繁树
Owner KONICA MINOLTA OPTO