PLANAR LIGHT SOURCE AND METHOD OF MANUFACTURING PLANAR LIGHT SOURCE
First Claim
1. A planar light source comprising:
- a substrate having a mount surface;
a plurality of red, green and blue light-emitting diodes mounted on the mount surface of the substrate, the light-emitting diodes being arranged to define a plurality of light source sets, each having mutually adjacent red, green and blue light-emitting diodes, the red, green and blue light-emitting diodes of each light source set being respectively disposed in corresponding quadrants of an X-Y coordinate system assumed over the each light source set; and
a first prism sheet and a second prism sheet stacked over the first prism sheet, the first prism sheet being set to face the mount surface at a predetermined distance from the plurality of red, green and blue light-emitting diodes, the first prism sheet and the second prism sheet each having mutually parallel elongated prisms on one surface thereof, an other surface thereof being a plane surface, the prisms of the first prism sheet and the prisms of the second prism sheet intersecting each other in plan view of the first and second prism sheets, the first and the second prism sheets being arranged so that the first prism sheet receives lights from the red, green and blue light-emitting diodes of the light source sets at a side of the first prism sheet, the side facing the light source sets, and the second prism sheet emits the lights from a side of the second prism sheet, the side opposite to a side facing the first prism sheet with the lights emitted from positions corresponding to origins of the X-Y coordinate systems being mixed each other.
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Accused Products
Abstract
A planar light source directly mixes three colors of light from light-emitting diodes into white light. The planar light source has a plurality of red (2r), green (2g) and blue (2b) light-emitting diodes mounted on a mount surface of a substrate to define a plurality of light source sets, each having mutually adjacent red, green and blue light-emitting diodes, and further has first and second prism sheets (PS1 and PS2) stacked to face the mount surface. The stacked prism sheets receive and mix three colors of light from the light-emitting diodes constituting each light source set and emit lights from the red, green and blue light-emitting diodes of each of the light source sets as white light.
28 Citations
18 Claims
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1. A planar light source comprising:
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a substrate having a mount surface; a plurality of red, green and blue light-emitting diodes mounted on the mount surface of the substrate, the light-emitting diodes being arranged to define a plurality of light source sets, each having mutually adjacent red, green and blue light-emitting diodes, the red, green and blue light-emitting diodes of each light source set being respectively disposed in corresponding quadrants of an X-Y coordinate system assumed over the each light source set; and a first prism sheet and a second prism sheet stacked over the first prism sheet, the first prism sheet being set to face the mount surface at a predetermined distance from the plurality of red, green and blue light-emitting diodes, the first prism sheet and the second prism sheet each having mutually parallel elongated prisms on one surface thereof, an other surface thereof being a plane surface, the prisms of the first prism sheet and the prisms of the second prism sheet intersecting each other in plan view of the first and second prism sheets, the first and the second prism sheets being arranged so that the first prism sheet receives lights from the red, green and blue light-emitting diodes of the light source sets at a side of the first prism sheet, the side facing the light source sets, and the second prism sheet emits the lights from a side of the second prism sheet, the side opposite to a side facing the first prism sheet with the lights emitted from positions corresponding to origins of the X-Y coordinate systems being mixed each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification