Surface light source device
AssigneeMitsubishi Electric Corporation
InventorsSeiji Sakai, Takuya Sakamoto
Life of this patent
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Abstract
A surface light-source device includes: a plurality of point light sources; a light-guide plate arranged for emitting from its emitting surface the light incident on one lateral side thereof from the point light sources; a lower case having a lateral side formed approximately in parallel to the incident surface of the light-guide plate; and a light-source substrate on which the plurality of point light sources are arranged at predetermined intervals, disposed on the light-guide plate side. The surface light-source device is includes a substrate holder that clamps the light-source substrate and the lateral side of the lower case by projections arranged on the substrate holder between adjacent two of the light sources.
Claims16
A surface light-source device comprising:
- a plurality of point light sources;
- a light-guide plate arranged for receiving light, emitted from the point light sources, incident on at least one lateral side of the light-guide plate, and for emitting light from an emitting surface thereof perpendicular to the one lateral side;
- a first case having a first lateral side formed approximately in parallel to the one lateral side of the light-guide plate;
- a light-source substrate on which the point light sources are arranged at predetermined intervals, the light-source substrate being disposed on the first lateral side of the first case;
- a substrate holder having projections in positions corresponding to the intervals between the point light sources, for clamping the light-source substrate and the first lateral side of the first case together by the projections;
- wherein
- first holes are formed in the first case on the side thereof opposite from the emitting surface of the light-guide plate, in order for the projections to pass through.
A surface light-source device comprising:
- a plurality of point light sources;
- a light-guide plate arranged for receiving light, emitted from the point light sources, incident on at least one lateral side of the light-guide plate, and for emitting light from an emitting surface thereof perpendicular to the one lateral side;
- a first case having a first lateral side formed approximately in parallel to the one lateral side of the light-guide plate;
- a light-source substrate on which the point light sources are arranged at predetermined intervals, the light-source substrate being disposed on the first lateral side of the first case;
- a substrate holder having projections in positions corresponding to the intervals between the point light sources, for clamping the light-source substrate and the first lateral side of the first case together by the projections;
- a second case having an emitting aperture for surface emission of light from the light-guide plate, and being fitted to the first case;
- wherein
- first holes are formed in the second case on a side thereof facing the emitting surface of the light-guide plate, in order for the projections to pass through.
A surface light-source device comprising:
- a plurality of point light sources;
- a light-guide plate arranged for receiving light, emitted from the point light sources, incident on at least one lateral side of the light-guide plate, and for emitting light from an emitting surface thereof perpendicular to the one lateral side;
- a first case having a first lateral side formed approximately in parallel to the one lateral side of the light-guide plate;
- a light-source substrate on which the point light sources are arranged at predetermined intervals;
- a substrate retainer on which the light-source substrate is fixed, and the substrate retainer being integrated with the light-source substrate;
- wherein
- the substrate retainer is configured to clamp both faces of the first lateral side of the first case.
A surface light-source device comprising:
- a plurality of point light sources;
- a light-guide plate arranged for receiving light, emitted from the point light sources, incident on at least one lateral side of the light-guide plate, and for emitting light from an emitting surface thereof perpendicular to the one lateral side;
- a first case for holding the light-guide plate;
- a light-source substrate on which the point light sources are arranged at predetermined intervals;
- a “L”-shaped substrate retainer in cross section, on which the light-source substrate is fixed, and the substrate retainer being integrated with the light-source substrate;
- wherein
- the substrate retainer is fastened with the first case on the side thereof opposite from the emitting surface of the light-guide plate, such that the point light sources are facing the one lateral side thereof.
Dependencies are inferred from the claim text.