Screen, projection system, front projection television receiver, and screen manufacturing method
First Claim
Patent Images
1. A screen comprising:
- a reflection surface which reflects projection light, the reflection surface including a plurality of convexes disposed thereon that each include a spherical surface having a ¼
spherical shape, a curved surface having curvature larger than curvature of the spherical surface and disposed along an end of the spherical surface, and a cover surface having a flat surface shape and disposed at an end of the curved surface,wherein the convexes project from a flat surface extending along the reflection surface; and
when a point A as a cross point of the spherical surface and the flat surface, a point B as a cross point of the spherical surface and the curved surface, a point C as a cross point of the curved surface and the cover surface, a point D as a cross point of the cover surface and the flat surface, and a point O as the center point of the spherical surface are provided in a cross-sectional shape extending in a first direction where the spherical surface, the curved surface, and the cover surface of each of the convexes are disposed, crossing the flat surface at a right angle, and passing the center of the convex in a second direction perpendicular to the first direction, a circular arc having a radius R between the points A and B, a circular arc having a radius R1 shorter than the radius R between the points B and C, a straight line between the points C and D, and a straight line passing the point O between the points D and A are formed.
1 Assignment
0 Petitions
Accused Products
Abstract
A screen includes: a reflection surface which reflects projection light, wherein a plurality of convexes are disposed on the reflection surface, and each of the convexes contains a spherical surface having a ¼ spherical shape, a curved surface having curvature larger than curvature of the spherical surface and disposed along an end of the spherical surface, and a cover surface having a flat surface shape and disposed at an end of the curved surface.
5 Citations
8 Claims
-
1. A screen comprising:
-
a reflection surface which reflects projection light, the reflection surface including a plurality of convexes disposed thereon that each include a spherical surface having a ¼
spherical shape, a curved surface having curvature larger than curvature of the spherical surface and disposed along an end of the spherical surface, and a cover surface having a flat surface shape and disposed at an end of the curved surface,wherein the convexes project from a flat surface extending along the reflection surface; and when a point A as a cross point of the spherical surface and the flat surface, a point B as a cross point of the spherical surface and the curved surface, a point C as a cross point of the curved surface and the cover surface, a point D as a cross point of the cover surface and the flat surface, and a point O as the center point of the spherical surface are provided in a cross-sectional shape extending in a first direction where the spherical surface, the curved surface, and the cover surface of each of the convexes are disposed, crossing the flat surface at a right angle, and passing the center of the convex in a second direction perpendicular to the first direction, a circular arc having a radius R between the points A and B, a circular arc having a radius R1 shorter than the radius R between the points B and C, a straight line between the points C and D, and a straight line passing the point O between the points D and A are formed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for manufacturing a screen which reflects projection light by a reflection surface, comprising:
-
forming a substrate which includes a plurality of convexes each including a spherical surface having a ¼
spherical shape, a curved surface having curvature larger than curvature of the spherical surface and disposed along an end of the spherical surface, and a cover surface having a flat surface shape and disposed at an end of the curved surface; andforming a reflection film on the spherical surface of each of the convexes to manufacture the screen, wherein the convexes project from a flat surface extending along the substrate; and when a point A as a cross point of the spherical surface and the flat surface, a point B as a cross point of the spherical surface and the curved surface, a point C as a cross point of the curved surface and the cover surface, a point D as a cross point of the cover surface and the flat surface, and a point O as the center point of the spherical surface are provided in a cross-sectional shape extending in a first direction where the spherical surface, the curved surface, and the cover surface of each of the convexes are disposed, crossing the flat surface at a right angle, and passing the center of the convex in a second direction perpendicular to the first direction, a circular arc having a radius R between the points A and B, a circular arc having a radius R1 shorter than the radius R between the points B and C, a straight line between the points C and D, and a straight line passing the point O between the points D and A are formed.
-
Specification