Reflector which appears bright when viewed at specific angle and reflective liquid crystal display
First Claim
1. A reflector comprising a substrate having a plurality of light-reflective concave portions on a surface thereof, each concave portion having a specific vertical section which passes through a deepest point of the concave portion,wherein an internal shape of the specific vertical section is defined by a first curve and a second curve, the first curve extending from a first point on a peripheral edge of the concave portion to the deepest point of the concave portion, and the second curve extending continuously from the first curve and from the deepest point of the concave portion to a second point on the peripheral edge of the concave portion, and wherein an average of an absolute value of an inclination angle of the first curve relative to the substrate surface is larger than an average of an absolute value of an inclination angle of the second curve relative to the substrate surface, a maximum value of the absolute value of the inclination angle of the first curve relative to the substrate surface is in the range of about 2°
- to 90°
, and a maximum value of the absolute value of the inclination angle of the second curve relative to the substrate surface is less than that of the maximum value of the absolute value of the inclination angle of the first curve relative to the substrate surface.
1 Assignment
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Accused Products
Abstract
A reflector for a liquid crystal display includes a substrate with light-reflective concave portions on the surface thereof. Each concave portion has a specific vertical section which passes through a deepest point of the concave portion. The internal shape of the specific vertical section is defined by a first curve, which extends from one point on the peripheral edge of the concave portion to the deepest point of the concave portion, and a second curve, which extends continuously from the first curve and from the deepest point of the concave portion to another point on the peripheral edge of the concave portion. The average of the absolute value of an inclination angle of the first curve relative to the substrate surface is larger than the average of the absolute value of an inclination angle of the second curve relative to the substrate surface.
67 Citations
71 Claims
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1. A reflector comprising a substrate having a plurality of light-reflective concave portions on a surface thereof, each concave portion having a specific vertical section which passes through a deepest point of the concave portion,
wherein an internal shape of the specific vertical section is defined by a first curve and a second curve, the first curve extending from a first point on a peripheral edge of the concave portion to the deepest point of the concave portion, and the second curve extending continuously from the first curve and from the deepest point of the concave portion to a second point on the peripheral edge of the concave portion, and wherein an average of an absolute value of an inclination angle of the first curve relative to the substrate surface is larger than an average of an absolute value of an inclination angle of the second curve relative to the substrate surface, a maximum value of the absolute value of the inclination angle of the first curve relative to the substrate surface is in the range of about 2° - to 90°
, anda maximum value of the absolute value of the inclination angle of the second curve relative to the substrate surface is less than that of the maximum value of the absolute value of the inclination angle of the first curve relative to the substrate surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- to 90°
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9. A reflector in which an integrated value of reflectance in a reflection-angle range smaller than a specular reflection angle with respect to a substrate surface is different from an integrated value of reflectance in a reflection-angle range larger than the specular reflection angle, wherein the reflection-angle range corresponding to the larger of the integrated values of reflectance is from about normal to the surface to about 35°
- from normal to the surface.
- View Dependent Claims (10, 11, 12)
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13. A reflector comprising a reflective surface in which incident light is diffusely reflected and is preferentially reflected over a range of angles smaller than that of a specular reflection angle of the incident light with respect to a normal of a surface of the reflector and back reflection is suppressed over a wide viewing-angle range, wherein the range of angles is from about normal to the surface to about 35°
- from normal to the surface.
- View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A liquid crystal display comprising:
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a reflector comprising a substrate having a plurality of light-reflective concave portions on a surface thereof, each concave portion having a specific vertical section which passes through a deepest point of the concave portion, wherein an internal shape of the specific vertical section is defined by a first curve and a second curve, the first curve extending from a first point on a peripheral edge of the concave portion to the deepest point of the concave portion, and the second curve extending continuously from the first curve and from the deepest point of the concave portion to a second point on the peripheral edge of the concave portion, and an average of an absolute value of an inclination angle of the first curve relative to the substrate surface is larger than an average of an absolute value of an inclination angle of the second curve relative to the substrate surface, and the concave portions are formed such that the specific vertical sections of each concave portion are aligned in the same direction and orientations of the first curves in the concave portions are the same, and the reflector is installed such that the first curves are disposed above the second curves in the concave portions when viewed by an observer. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. A reflector in which an integrated value of reflectance in a reflection-angle range smaller than a specular reflection angle with respect to a substrate surface is different from an integrated value of reflectance in a reflection-angle range larger than the specular reflection angle, wherein a peak of brightness of the liquid crystal display is approximately 20°
- from normal to the surface.
- View Dependent Claims (39, 40)
- 41. A reflector in which an integrated value of reflectance in a reflection-angle range smaller than a specular reflection angle with respect to a substrate surface is different from an integrated value of reflectance in a reflection-angle range larger than the specular reflection angle, wherein the reflection-angle range corresponding to the larger of the integrated values of reflectance is more proximate to a normal of the substrate surface than the specular reflection angle.
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44. A reflector comprising a reflective surface in which incident light is diffusely reflected and is preferentially reflected over a range of angles smaller than that of a specular reflection angle of the incident light with respect to a normal of a surface of the reflector and back reflection is suppressed over a wide viewing-angle range, wherein a peak of brightness of the liquid crystal display is approximately 20°
- from normal to the surface.
- View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A reflector comprising a reflective surface in which incident light is diffusely reflected and is preferentially reflected over a range of angles smaller than that of a specular reflection angle of the incident light with respect to a normal of a surface of the reflector and back reflection is suppressed over a wide viewing-angle range,
wherein the reflective surface comprises a plurality of light-reflective concave portions having an internal shape with a cross-section defined by a first curve and a second curve, the first curve extending from a first point on a peripheral edge of the concave portion to a deepest point of the concave portion, and the second curve extending continuously from the first curve and from the deepest point of the concave portion to a second point on the peripheral edge of the concave portion, and wherein an average of an absolute value of an inclination angle of the first curve relative to a surface of the reflector is larger than an average of an absolute value of an inclination angle of the second curve relative to the reflector surface.
Specification