Backlighting device with a transparent sheet having straight ridges
First Claim
1. A backlighting device comprising:
- at least one linear light source;
a light conducting plate made of a transparent material and having a side face adjacent to the light source, a thickness of the light conducting plate decreasing as a position goes away from the light source;
light diffusing elements formed on a major surface of the light conducting plate opposite to a light exit surface thereof; and
at least one sheet made of a transparent material having, on a same surface thereof, at least one of a number of prisms and protrusions having straight ridges that are arranged substantially parallel with each other at small intervals, the sheet being disposed on a side of the light exit surface of the light conducting plate so that extensions of the straight ridges are substantially perpendicular to a central, longitudinal axis of the light source.
1 Assignment
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Accused Products
Abstract
A linear light source is disposed adjacent to the side face of a transparent light conducting plate. The thickness of the light conducting plate decreases as the position goes away from the light source. Light diffusing elements are formed on the major surface of the light conducting plate opposite to its light exit surface. At least one transparent sheet has, on the same surface thereof, a number of prisms having straight ridges that are arranged substantially parallel with each other at small intervals. The transparent sheet is disposed on the side of the light exit surface of the light conducting plate so that extensions of the straight ridges intersect the light source substantially perpendicularly.
182 Citations
11 Claims
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1. A backlighting device comprising:
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at least one linear light source; a light conducting plate made of a transparent material and having a side face adjacent to the light source, a thickness of the light conducting plate decreasing as a position goes away from the light source; light diffusing elements formed on a major surface of the light conducting plate opposite to a light exit surface thereof; and at least one sheet made of a transparent material having, on a same surface thereof, at least one of a number of prisms and protrusions having straight ridges that are arranged substantially parallel with each other at small intervals, the sheet being disposed on a side of the light exit surface of the light conducting plate so that extensions of the straight ridges are substantially perpendicular to a central, longitudinal axis of the light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification