Lighting device, display device and television receiver
First Claim
Patent Images
1. A lighting device comprising:
- a plurality of point light sources;
a chassis housing the point light sources and having an opening through which light emitted from the point light sources exits; and
an optical member facing the point light sources and provided to cover the opening, wherein;
the point light sources are arranged at relatively small intervals in a light source high-density area and the point light sources are arranged at relatively large intervals in a light source low-density area;
the optical member includes a light reflection portion so as to overlap at least the light source low-density area, the light reflection portion is configured to reflect light emitted from the point light sources;
the lighting device further includes a diffuser lens provided on at least a light exit side of the point light sources that are arranged in the light source low-density area, the diffuser lens configured to diffuse light emitted from the point light sources;
the diffuser lens has a light exit surface facing the optical member and light emitted from the point light source and entering the diffuser lens exits from the light exit surface; and
the light exit surface has a light exit side recess so as to overlap the point light source, the light exit side recess is recessed to the point light source side.
1 Assignment
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Accused Products
Abstract
It is an object of the present invention to provide a lighting device realizing reduction in cost and suppression of power consumption and suppressing generation of a lamp image. A lighting device 12 of the present invention includes a plurality of point light sources 80; a chassis 14 housing the point light sources 80 and having an opening 14b through which light from the point light sources 80 exits; and an optical member 15 (15a) facing the point light sources 80 and provided to cover the opening 14b. The point light sources 80 are arranged such that a light source high-density area LH where an arrangement interval thereof is relatively small and a light source low-density area LL where an arrangement interval thereof is relatively large are provided. Light reflection portions 50 reflecting lights from the point light sources 80 are formed in at least a region overlapping with the light source low-density area LL in the optical member 15 (15a).
28 Citations
16 Claims
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1. A lighting device comprising:
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a plurality of point light sources; a chassis housing the point light sources and having an opening through which light emitted from the point light sources exits; and an optical member facing the point light sources and provided to cover the opening, wherein; the point light sources are arranged at relatively small intervals in a light source high-density area and the point light sources are arranged at relatively large intervals in a light source low-density area; the optical member includes a light reflection portion so as to overlap at least the light source low-density area, the light reflection portion is configured to reflect light emitted from the point light sources; the lighting device further includes a diffuser lens provided on at least a light exit side of the point light sources that are arranged in the light source low-density area, the diffuser lens configured to diffuse light emitted from the point light sources; the diffuser lens has a light exit surface facing the optical member and light emitted from the point light source and entering the diffuser lens exits from the light exit surface; and the light exit surface has a light exit side recess so as to overlap the point light source, the light exit side recess is recessed to the point light source side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A lighting device, comprising:
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a plurality of point light sources; a chassis housing the point light sources and having an opening through which light emitted from the point light sources exits; and an optical member facing the point light sources and provided to cover the opening, wherein; the point light sources are arranged at relatively small intervals in a light source high-density area and the point light sources are arranged at relatively large intervals in a light source low-density area; the optical member includes a light reflection portion so as to overlap at least the light source low-density area, the light reflection portion is configured to reflect light emitted from the point light sources; the lighting device further includes a diffuser lens provided on at least a light exit side of the point light sources that are arranged in the light source low-density area, the diffuser lens configured to diffuse light emitted from the point light sources; the diffuser lens has a light entrance surface facing one of the point light sources and receiving light from the point light source; the light entrance surface has a light entrance side recess so as to overlap the point light source, the light entrance side recess is recessed to the optical member side; and the light entrance side recess has a side wall inclined so as to face the point light source.
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Specification
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Current AssigneeSharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
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Original AssigneeSharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
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InventorsYokota, Masashi
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Primary Examiner(s)Natnael, Paulos M
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Application NumberUS13/378,710Publication NumberTime in Patent Office1,198 DaysField of Search348/790, 348/791, 348/794, 362/249.02, 362/235, 349/62, 349/56, 349/58US Class Current348/790CPC Class CodesG02F 1/133603 with LEDsG02F 1/133605 including specially adapted...G02F 1/133607 the light controlling membe...G02F 1/133611 including means for improvi...G02F 1/133613 characterized by the sequen...
