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AssigneeDai Nippon Printing Co., Ltd.
InventorsGen Furui, Makoto Honda, Takashi Kodama
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The purpose of this invention is to achieve a video display device antiglare sheet having excellent black glossiness, darkness in dark places, and antiglare properties in video applications, and suited to realizing high image quality. An antiglare layer including a transparent resin and diffusion particles is provided on at least one surface of a transparent substrate. The antiglare layer is uneven on the surface opposite of the transparent substrate, said unevenness being formed mainly by convexities resulting from the diffusion particles which have an impregnation layer in which all or a part of the component constituting the transparent resin is impregnated. Defining Q as the brightness in the regular transmission direction when visible light beam is irradiated normally from the transparent substrate side onto the antiglare sheet, Q30 as the brightness in the direction 30 DEG from regular transmission, and U as the average value of the transmission intensities extrapolated to regular transmission from the straight line connecting the brightness in the direction +2 DEG from the regular transmission and the brightness in the direction +1 DEG from the regular transmission and the straight line connecting the brightness in the direction −2 DEG from the regular transmission and the brightness in the direction −1 DEG from the regular transmission, this antiglare sheet fulfills (Expression 1) and (Expression 2) below. (Expression 1) 10<Q/U<36 (Expression 2) Log10(Q30/Q)<−6
An antiglare sheet having an antiglare layer comprising a translucent resin and diffusion particles on at least one side of a transparent base material, the antiglare layer having irregularities on the side opposite the transparent base material, the irregularities being formed primarily by raised sections based on the diffusion particles that have an impregnation layer in which all or a portion of the component composing the translucent resin has been impregnated, wherein the following inequalities (1) and (2) are satisfied, Q representing the luminance in the direction of regular transmission, when visible light rays have been irradiated on the antiglare sheet perpendicular to the transparent base material side, Q30 representing the luminance in the direction 30 degrees from regular transmission, and U representing the mean value of the transmission intensity determined by extrapolation of a straight line connecting the luminance in the direction +2 degrees from regular transmission with the luminance in the direction +1 degrees from regular transmission, and a straight line connecting the luminance in the direction −2 degrees from regular transmission with the luminance in the direction −1 degrees from regular transmission, to regular transmission respectively.
A method for producing an antiglare sheet having an antiglare layer comprising a translucent resin and diffusion particles on at least one side of a transparent base material, the antiglare layer having irregularities on the side opposite the transparent base material, the irregularities being formed primarily by raised sections based on the diffusion particles that have an impregnation layer in which all or a portion of the component composing the translucent resin has been impregnated, wherein control is effected so that the antiglare sheet properties satisfy the following (inequality 8) and (inequality 9), Q representing the luminance in the direction of regular transmission, when visible light rays have been irradiated on the antiglare sheet perpendicular to the transparent base material side, Q30 representing the luminance in the direction 30 degrees from regular transmission, and U representing the mean value of the transmission intensity determined by extrapolation of a straight line connecting the luminance in the direction +2 degrees from regular transmission with the luminance in the direction +1 degrees from regular transmission, and a straight line connecting the luminance in the direction −2 degrees from regular transmission with the luminance in the direction −1 degrees from regular transmission, to regular transmission.
A method for improving the vivid complexion and blackness and image crispness of an image display device suitable for both dynamic images and still images, wherein in an image display device suitable for both dynamic images and still images, having on the viewing side of the image display device an antiglare sheet having an antiglare layer comprising a translucent resin and diffusion particles on at least one side of a transparent base material, the antiglare layer having irregularities on the side opposite the transparent base material, the irregularities being formed primarily by raised sections based on the diffusion particles that have an impregnation layer in which all or a portion of the component composing the translucent resin has been impregnated, the following (inequality 10) and (inequality 11) are satisfied, Q representing the luminance in the direction of regular transmission, when visible light rays have been irradiated on the antiglare sheet perpendicular to the transparent base material side, Q30 representing the luminance in the direction 30 degrees from regular transmission, and U representing the mean value of the transmission intensity determined by extrapolation of a straight line connecting the luminance in the direction +2 degrees from regular transmission with the luminance in the direction +1 degrees from regular transmission, and a straight line connecting the luminance in the direction −2 degrees from regular transmission with the luminance in the direction −1 degrees from regular transmission, to regular transmission.
Dependencies are inferred from the claim text.