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US 2007/0182882 A1Published application
Light control film and backlight unit using the same
AssigneeKimoto Co., Ltd.
InventorHideki Etori
Life of this patent
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AssigneeKimoto Co., Ltd.
InventorHideki Etori
Estimating the term…
A light control film enabling improvement in front luminance, having appropriate light diffusing property and free from problems of interference pattern, glare etc. is provided. A light control film 10 having a rough surface is constituted so that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film should be not less than 27 degrees and not more than 70 degrees at substantially any position on the light control film.
A light control film having a rough surface, wherein, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film is not less than 27 degrees and not more than 70 degrees at substantially any position on the light control film.
A light control film having a rough surface formed by a patterned layer comprising a material having a refractive index n, wherein, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film is not less than (59-20 n) degrees and not more than 70 degrees at any position on the light control film.
A light control film having a rough surface, wherein, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film and a ratio of an area of the approximately square region (A1) and a surface area of the approximated curved surface of the rough surface (A2) (Ar=A2/A1) satisfy the following equation (1) or (2) at substantially any position on the light control film.
A light control film having a rough surface formed by a patterned layer comprising a material having a refractive index n, wherein, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film and a ratio of an area of the approximately square region (A1) and a surface area of the approximated curved surface of the rough surface (A2) (Ar=A2/A1) satisfy the following equation (3) or (4) at substantially any position on the light control film.
A light control film having a rough surface, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film is not less than 27 degrees and not more than 70 degrees, and an absolute value of a numerical value (Ask) calculated in accordance with the equation (5) by using all the height data of the rough surface is not more than 1.2 is satisfied at substantially any position on the light control film.
A light control film having a rough surface formed by a patterned layer comprising a material having a refractive index n, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film is not less than (59-20 n) degrees and not more than 70 degrees, and an absolute value of a numerical value (Ask) calculated in accordance with the equation (5) by using all the height data of the rough surface is not more than 1.2 is satisfied at substantially any position on the light control film.
A light control film having a rough surface, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film is not less than 27 degrees and not more than 70 degrees, and a numerical value (Aku) calculated in accordance with the equation (6) by using all the height data of the rough surface is not less than 1.5 and not more than 5.0 is satisfied at substantially any position on the light control film.
A light control film having a rough surface formed by a patterned layer comprising a material having a refractive index n, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, an average of slopes of the curved surface (θnv (degree)) of the rough surface with respect to a base plane of the film is not less than (59-20 n) degrees and not more than 70 degrees, and a numerical value (Aku) calculated in accordance with the equation (6) by using all the height data of the rough surface is not less than 1.5 and not more than 5.0 is satisfied at substantially any position on the light control film.
A light control film having a rough surface, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, a ratio of an area of the approximately square region (A1) and a surface area of the approximated curved surface of the rough surface (A2) (Ar=A2/A1) is not less than 1.2 and not more than 2.5, and absolute value of a numerical value (Ask) calculated in accordance with the equation (5) by using all the height data of the rough surface is not more than 1.2 is satisfied at substantially any position on the light control film.
A light control film having a rough surface formed by a patterned layer comprising a material having a refractive index n, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, a ratio of an area of the approximately square region (A1) and a surface area of the approximated curved surface of the rough surface (A2) (Ar=A2/A1) is not less than (2-0.5 n) and not more than 2.5, and absolute value of a numerical value (Ask) calculated in accordance with the equation (5) by using all the height data of the rough surface is not more than 1.2 is satisfied at substantially any position on the light control film.
A light control film having a rough surface, wherein a condition that, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, a ratio of an area of the approximately square region (A1) and a surface area of the approximated curved surface of the rough surface (A2) (Ar=A2/A1) is not less than 1.2 and not more than 2.5, and a numerical value Aku calculated in accordance with the equation (6) by using all the surface height data is not less than 1.5 and not more than 5.0 is satisfied at substantially any position on the light control film.
A light control film having a rough surface formed by a patterned layer comprising a material having a refractive index n, wherein, for a curved surface of the rough surface approximated in an approximately square region having an area of 1 mm2 or larger defined at an arbitrary position on the rough surface by using height data of the rough surface measured with predetermined intervals for the longitudinal and transverse directions in the approximately square region, a ratio of an area of the approximately square region (A1) and a surface area of the approximated curved surface of the rough surface (A2) (Ar=A2/A1) is not less than (2-0.5 n) and not more than 2.5, and a numerical value Aku calculated in accordance with the equation (6) by using all the surface height data is not less than 1.5 and not more than 5.0 at substantially any position on the light control film.
Dependencies are inferred from the claim text.