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US 5,418,384 AGranted
Light-source device including a linear array of LEDs
AssigneeSharp Kabushiki Kaisha
InventorsShinji Yamana, Terukazu Ohtsuki
Life of this patent
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Abstract
A light-source device includes a light source and a light-pervious flat board, the light source being optically connected to one side of the flat board for introduction of light into the flat board so that the incoming light is caused to be reflected from other side of the flat board therewithin for being directed outward from the flat board, the light reflecting side of the flat board being indented to provide a surface having a serrated sectional configuration.
Claims20
A light-source device comprising:
- a light-source including a linear array of light emitting diodes, and
- converting means for converting light emitted from the light-source into one dimension light spread for uniformly illuminating a linear field which is longer than the linear array of light emitting diodes,
- the converting means including a light-pervious multilateral faced flat board including at least three lateral faces, both ends of a first lateral face each being joined with a second and a third lateral face, the light-source being provided adjacent to the first lateral face of the flat board for introduction of light into the flat board so that the incoming light is caused to be reflected from the second lateral face and directed from the flat board to the linear field through the third lateral face, the second lateral face having a reflection area with a serrated sectional configuration, the linear array of light emitting diodes being arranged orthogonally to the third lateral face.
A light-source device comprising:
- a substrate of electrical insulating material having an elongated recess formed in a surface thereof;
- a conductive reflective film on a surface of the recess, said film being separated into a plurality of electrically separate portions within the recess;
- a linear array of light emitting diodes comprising end diodes and intermediate diodes, each of said diodes being conductively mounted on one of the separate portions of said film on the bottom surface of said recess;
- each of said intermediate diodes including a bonding wire electrically connecting the respective diode to an adjacent separate portion of said film in said recess;
- each of said end diodes being connected to an electrical power source for supplying electrical energy to said linear array of light emitting diodes;
- and
- a light pervious material formed in said recess to cover said diodes.
4 more elements
Dependencies are inferred from the claim text.