Reflector which exhibits good reflectance over wide angle range and liquid crystal display using the same
AssigneeAlps Electric Co., Ltd.
InventorsKatsumasa Yoshii, Kenji Omote, Mitsuru Kano
Life of this patent
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AssigneeAlps Electric Co., Ltd.
InventorsKatsumasa Yoshii, Kenji Omote, Mitsuru Kano
Estimating the term…
Light-reflective concave portions are disposed on the surface of a substrate. The concave portions have a first and second vertical section perpendicular to each other. The first vertical section has an internal shape defined by a first curve and a second curve, the first curve extending from one point on the 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 another point on the peripheral edge of the concave portion. The average of the absolute value of an inclination angle of the first curve is larger than that of the second curve relative to the substrate surface. The second vertical section has an internal shape defined by a shallow curve and deep curves formed at both sides of the shallow curve.
A reflector comprising a substrate having a plurality of light-reflective concave portions on a surface thereof, each concave portion having a first vertical section and a second vertical section which pass through a deepest point of the concave portion,
A reflector in which peak reflectance is obtained at about a specular reflection angle and a first integrated value of reflectance in a reflection-angle range smaller than the specular reflection angle with respect to a substrate surface is different from a second integrated value of reflectance in a reflection-angle range larger than the specular reflection angle.
A reflector comprising a substrate having a plurality of light-reflective concave portions on a surface thereof and a peak reflectance at about a specular reflection angle and a first integrated value of reflectance in a first reflection-angle range smaller than the specular reflection angle with respect to a substrate surface is larger than a second integrated value of reflectance in a second reflection-angle range larger than the specular reflection angle, the concave portions having a first vertical section including a first curve and a second curve and a second vertical section,
Dependencies are inferred from the claim text.