Abstract: A method of producing a mold for use in duplicating a light diffusion sheet is provided. The method includes a step of conducting sand blasting for blasting abrasive material from a blast gun to a surface of a mold base material to form unevenness in the surface of the mold base material, wherein the abrasive material is blasted to the surface of the mold base material at a blast angle of less than 90°.

Abstract: An optical element covering member capable of improving insufficiency in rigidity of the optical element while an increase in thickness of a liquid crystal display device or deterioration of display characteristics of the liquid crystal display device is reduced, a backlight provided with the optical element covering member, and a liquid crystal display device are provided. The optical element covering member includes at least one optical element, a support medium for supporting the at least one optical element, and a covering member for covering the at least one optical element and the support medium. The at least one optical element and the support medium constitute a stack.

Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a finite focal distance on the emission side of illumination light and have an aspheric face of a leftwardly and rightwardly symmetric sectional shape. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2))+AX4+BX5+CX6+ . . . (where R is the radius of curvature of a distal end vertex, K is a conic constant, and A, B, C, . . . are aspheric coefficients).

Abstract: An optical packaged body capable of preventing generation of a wrinkle, deflection, and warpage, and capable of being thinned is provided. The optical packaged body includes a support medium and a packaging film that covers the support medium in a state of being applied with shrinkage force. The packaging film has an optical function section that acts on light from a light source in at least one of a first region into which the light from the light source enters and a second region from which the light from the light source is emitted after passing through the optical packaged body when the light source is arranged on one face side of the optical packaged body.

Abstract: An optical packaged body capable of preventing generation of a wrinkle, deflection, and warpage, capable of being thinned is provided. The optical package body includes a support medium and a packaging film that covers the support medium in a state of being applied with shrinkage force. The packaging film has an optical function section that acts on light from a light source in at least one of a first region into which the light from the light source enters and a second region from which the light from the light source is emitted after passing through the optical packaged body when the light source is arranged on one face side of the optical packaged body.

Abstract: An optical sheet packaged body in which a wrinkle is not generated is provided. The optical sheet packaged body includes a laminated body in which a plurality of optical sheets such as a light source image segmentation sheet, a diffusion plate, a diffusion sheet, and a luminance enhancement film are layered, and a flexible film that wraps around the laminated body and has one or a plurality of openings to expose at least part of an outer edge of the diffusion plate. An exposed portion exposed from at least one of the openings of the diffusion plate is provided with a shape (supported portion) for positioning to a chassis (bottom chassis and middle chassis) supporting the optical sheet packaged body.

Abstract: A processing apparatus is provided. The processing apparatus includes a processing portion, an actuator, a casing, a preload mechanism, a force sensor, and a detection unit. The processing portion includes a cutting edge. The actuator is configured to cause the processing portion to vibrate microscopically. The casing is configured to accommodate the actuator. The preload mechanism is disposed inside the casing and configured to impart a preload to the actuator. The force sensor is disposed between the cutting edge and the preload mechanism. The detection unit detects a cutting force of the processing portion based on an output of the force sensor.

Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).

Abstract: A light diffusing film, a screen that utilizes same, and a method of producing same are provided. The light diffusing film provides a high luminance uniform over an overall area with a simple configuration and provides a good visibility. Also a method of producing the light diffusing film as well as a screen in which the light diffusing film is used are disclosed. The light diffusing film includes a base film, and a light diffusing layer formed on a principal surface of the base film and having a group of micro lenses each having a convex or concave shape which has different curvatures from each other along cross sections in a transverse direction and a vertical direction of the principal surface of the base film. The micro lenses individually have optical axes which are inclined toward the position of an assumed viewer forwardly of the light diffusing film.

Abstract: An optical element covering member capable of improving insufficiency in rigidity of the optical element while an increase in thickness of a liquid crystal display device or deterioration of display characteristics of the liquid crystal display device is reduced, a backlight provided with the optical element covering member, and a liquid crystal display device are provided. The optical element covering member includes at least one optical element, a support medium for supporting the at least one optical element, and a covering member for covering the at least one optical element and the support medium. The at least one optical element and the support medium constitute a stack.

Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).

Abstract: An optical packaged body capable of preventing generation of a wrinkle, deflection, and warpage, capable of being thinned is provided. The optical package body includes a support medium and a packaging film that covers the support medium in a state of being applied with shrinkage force. The packaging film has an optical function section that acts on light from a light source in at least one of a first region into which the light from the light source enters and a second region from which the light from the light source is emitted after passing through the optical packaged body when the light source is arranged on one face side of the optical packaged body.

Abstract: A method of producing a mold for use in duplicating a light diffusion sheet is provided. The method includes a step of conducting sand blasting for blasting abrasive material from a blast gun to a surface of a mold base material to form unevenness in the surface of the mold base material, wherein the abrasive material is blasted to the surface of the mold base material at a blast angle of less than 90°.

Abstract: A method of producing a mold for use in duplicating a light diffusion sheet is provided. The method includes a step of conducting sandblasting for blasting abrasive material from a blast gun to a surface of a mold base material to form unevenness in the surface of the mold base material, wherein the abrasive material is blasted to the surface of the mold base material at a blast angle of less than 90°.

Abstract: An optical sheet is provided. The optical sheet includes: a light-transmissive base; and an optical functional layer provided to at least one surface of the base, in which the base is composed of a stack of transmissive sheets bonded while placing an adhesive material layer in between.

Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a finite focal distance on the emission side of illumination light and have an aspheric face of a leftwardly and rightwardly symmetric sectional shape. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2))+AX4+BX5+CX6+ . . . (where R is the radius of curvature of a distal end vertex, K is a conic constant, and A, B, C, . . . are aspheric coefficients).

Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).

Abstract: A light diffusing film, a screen that utilizes same, and a method of producing same are provided. The light diffusing film provides a high luminance uniform over an overall area with a simple configuration and provides a good visibility. Also a method of producing the light diffusing film as well as a screen in which the light diffusing film is used are disclosed. The light diffusing film includes a base film, and a light diffusing layer formed on a principal surface of the base film and having a group of micro lenses each having a convex or concave shape which has different curvatures from each other along cross sections in a transverse direction and a vertical direction of the principal surface of the base film. The micro lenses individually have optical axes which are inclined toward the position of an assumed viewer forwardly of the light diffusing film.

Abstract: A method of producing a mold for use in duplicating a light diffusion sheet is provided. The method includes a step of conducting sandblasting for blasting abrasive material from a blast gun to a surface of a mold base material to form unevenness in the surface of the mold base material, wherein the abrasive material is blasted to the surface of the mold base material at a blast angle of less than 90°.

Abstract: A recording medium cartridge which is capable of preventing a drop in aesthetic quality by preventing damage to a printed layer for writing during ultrasonic welding is presented. As a printed layer (20), a writing-enabling filler (21), and resin particles (22) having an average particle diameter equal to or greater than the average particle diameter of the writing-enabling filler (21) mentioned above are included in an ink (23). The resin particles (22) come into contact with a welding horn (9), and prevent the writing-enabling filler (21) from falling out or changing shape due to ultrasonic vibration.