Anti-glare sheet for image display device

Abstract

An anti-glare sheet that exhibits excellent glossy black textures, blackness in dark locations, and anti-glare properties for dynamic images, and that is suited to the implementation of high quality images. The anti-glare sheet has, on at least one surface of a transparent substrate, an anti-glare layer in which a texturized layer comprising diffusion particles and a first binder, and a smoothing layer comprising a second binder are layered in said order from the transparent substrate. The anti-glare sheet is characterized by the texturized layer having first protrusions based on the diffusion particles and on the surface on the opposite side of the texturized layer to the transparent substrate, the smoothing layer having second protrusions based on the first protrusions and on the surface on the opposite side of the smoothing layer to the transparent substrate, and equation (1) and equation (2) being satisfied where Q is the luminance in the direction of regular transmission when visible light is perpendicularly irradiated on the anti-glare sheet from the transparent substrate side, Q30 is the luminance in a direction 30 degrees from regular transmission; and U is the average value of the transmission intensity obtained by respectively extrapolating, to a regular transmission, a straight line connecting the luminance in a direction +2 degrees from regular transmission to the luminance in a direction +1 degree from regular transmission, and a straight line connecting the luminance in a direction -2 degrees from regular transmission to the luminance in a direction -1 degree from regular transmission. Equation (1): 10

Description

Technical field [0001] The present invention relates to an anti-glare sheet for an image display device with a pure blackness, a degree of blackness in a dark place, excellent anti-glare properties (animation anti-glare properties) in animation applications, and suitable for realizing high-quality image display devices. Background technique [0002] In image display devices such as cathode ray tube display devices (CRT), liquid crystal displays (LCD), plasma displays (PDP), and electroluminescence displays (ELD), an optical laminate for preventing reflection is generally provided on the outermost surface. Such an anti-reflection optical laminate suppresses reflection of an image or reduces the reflectance through diffusion or interference of light. [0003] As one of the optical laminates for anti-reflection, an anti-glare sheet in which an anti-glare layer having an uneven shape is formed on the surface of a transparent base material is known. The anti-glare sheet can diffuse ext...

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Problems solved by technology

[0036] In addition, in Patent Documents 8 and 9, which limit the diffusion characteristics of the anti-glare sheet, although the contrast becomes good, physical properties such as adhesion and hard coat properties, which are unavoidable for practical use, and glare, Issues such as balancing animation and still images, etc., have not achieved sufficient performance

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