Backlighting apparatus and display apparatus using the same
First Claim
1. A backlighting apparatus for radiating light to a flat surface to be illuminated, the apparatus comprising:
- a light source having a linear light emitting portion;
light shield means, provided along an outer periphery of the light source on the side of said to-be-illuminated surface, for shielding light traveling directly from the light source toward the to-be-illuminated surface; and
a first optical element located parallel to the light source such that the first optical element faces the light source, the first optical element having a reflection surface for reflecting light emitted from the light source toward the to-be-illuminated surface,wherein a cross-sectional shape of the reflection surface in a direction perpendicular to the longitudinal direction of the light source is determined such that light reflected by the reflection surface of the first optical element has a substantially uniform illuminance distribution on the to-be-illuminated surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A backlighting apparatus for radiating light on a flat surface to be illuminated comprises a light source having a linear light emitting portion, a light shield section, provided along an outer periphery of the light source on the side of the to-be-illuminated surface, for shielding light traveling directly from the light source toward the to-be-illuminated surface, and a first optical element provided in a longitudinal direction of the light source such that the first optical element faces the light source, the first optical element having a reflection surface for reflecting light emitted from the light source toward the to-be-illuminated surface. A cross-sectional shape of the reflection surface in a direction perpendicular to the longitudinal direction of the light source is determined such that light reflected by the reflection surface of the first optical element has a substantially uniform illuminance distribution on the to-be-illuminated surface.
-
Citations
14 Claims
-
1. A backlighting apparatus for radiating light to a flat surface to be illuminated, the apparatus comprising:
-
a light source having a linear light emitting portion; light shield means, provided along an outer periphery of the light source on the side of said to-be-illuminated surface, for shielding light traveling directly from the light source toward the to-be-illuminated surface; and a first optical element located parallel to the light source such that the first optical element faces the light source, the first optical element having a reflection surface for reflecting light emitted from the light source toward the to-be-illuminated surface, wherein a cross-sectional shape of the reflection surface in a direction perpendicular to the longitudinal direction of the light source is determined such that light reflected by the reflection surface of the first optical element has a substantially uniform illuminance distribution on the to-be-illuminated surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A display apparatus comprising:
-
a plate-shaped display panel; a light source having a linear light emitting portion; light shield means, provided along an outer periphery of the light source on the side of the display panel, for shielding light traveling directly from the light source to the display panel; and a first optical element located parallel to the light source such that the first optical element faces the light source, the first optical element having a reflection surface for reflecting light emitted from the light source toward the display panel, wherein a cross-sectional shape of the reflection surface in a direction perpendicular to the longitudinal direction of the light source is determined such that light reflected by the reflection surface of the first optical element has a substantially uniform illuminance distribution on the display panel. - View Dependent Claims (14)
-
Specification