Illuminating unit and display apparatus

Patent metadata

Field	Value
Publication number	US-2018074249-A1
Application number	US-201615562106-A
Country	US
Kind code	A1
Filing date	Mar 1, 2016
Priority date	Apr 6, 2015
Publication date	Mar 15, 2018
Grant date	—

Abstract

An illuminating unit includes: a light-guiding section including a plurality of light-guiding plates, in which the light-guiding plates are stacked in a thickness direction and each have a light entrance section and a light output surface; a plurality of light sources that output light toward the light entrance sections of the respective light-guiding plates of the light-guiding section; and a substrate that supports the plurality of light sources and on which a circuit section is disposed, in which the circuit section drives each of the light sources. A first portion, on which the circuit section is disposed, of the substrate is disposed in opposition to a back surface of the light-guiding section.

First claim

1 . An illuminating unit comprising:
a light-guiding section including a plurality of light-guiding plates, the light-guiding plates being stacked in a thickness direction and each having a light entrance section and a light output surface; a plurality of light sources that output light toward the light entrance sections of the respective light-guiding plates of the light-guiding section; and a substrate that supports the plurality of light sources and on which a circuit section is disposed, the circuit section driving each of the light sources, a first portion, on which the circuit section is disposed, of the substrate being disposed in opposition to a back surface of the light-guiding section.

2 . The illuminating unit according to claim 1 , wherein
the substrate includes the first portion and a second portion, and has a bent shape, the second portion being disposed in opposition to the light entrance section, the bent shape being folded between the first portion and the second portion, and the plurality of light sources are disposed at the second portion of the substrate.

3 . The illuminating unit according to claim 1 , further comprising a structure that is provided between the plurality of light-guiding plates and covers a portion on side of the light entrance section of the light-guiding plate, and having one or both of a light-shielding function and a reflecting function.

4 . The illuminating unit according to claim 3 , wherein the structure has a portion that assures a clearance between the light-guiding plate and the light source, and that latches shifting of the light-guiding plate to side of the light source.

5 . The illuminating unit according to claim 3 , wherein the structure includes a grey resin material.

6 . The illuminating unit according to claim 1 , wherein
the substrate includes the first portion, a second portion, and a third portion, and has a bent shape, the second portion being disposed in opposition to the light entrance section, the third portion being disposed in opposition to a front surface of the light-guiding section, the bent shape being folded between the first portion and the second portion and between the second portion and the third portion, and the plurality of light sources are disposed at the second portion of the substrate.

7 . The illuminating unit according to claim 1 , further comprising a heat dissipation member disposed on side of the back surface of the light-guiding section and thermally coupled to the substrate.

8 . The illuminating unit according to claim 7 , further comprising a multi-layered sheet disposed on each one surface side of the heat dissipation member and the substrate and disposed to lie across the heat dissipation member and the substrate, and including a heat diffusion layer and a heat insulation layer.

9 . The illuminating unit according to claim 7 , wherein the heat dissipation member is thermally coupled to a surface, on which the light source is mounted, of the substrate.

10 . The illuminating unit according to claim 7 , wherein
an end of the substrate is folded in a Z-shaped form, and the heat dissipation member is disposed at a space created by the folding of the substrate in the Z-shaped form, and is thermally coupled to the substrate.

11 . The illuminating unit according to claim 1 , wherein the light source comprises a top-emitting type light-emitting diode.

12 . The illuminating unit according to claim 1 , wherein
the substrate has a flat plate shape, and the plurality of light sources are disposed on an extending surface of the first portion of the substrate.

13 . The illuminating unit according to claim 12 , wherein
the plurality of light sources are configured by an edge-emitting type light-emitting diode, and the light-emitting diode has a plurality of light emission regions formed at positions that are different in height from each other.

14 . The illuminating unit according to claim 12 , wherein the plurality of light sources each comprise an edge-emitting type light-emitting diode, and a height of a light emission region is different for each of the light-guiding plates.

15 . The illuminating unit according to claim 12 , wherein
the light sources each comprise a top-emitting type light-emitting diode, and the light entrance section of the light-guiding plate has a tilted surface or a curved surface.

16 . The illuminating unit according to claim 1 , further comprising a functional sheet disposed between the plurality of light-guiding plates at a portion on side of the light entrance section of the light-guiding plate, and having both of a light-shielding function and a reflecting function.

17 . The illuminating unit according to claim 16 , wherein the functional sheet comprises a mirror surface-tone sheet, a metallic thin film, or a laminated film in which a light-shielding layer is interposed between a pair of reflecting layers.

18 . The illuminating unit according to claim 1 , wherein the plurality of light-guiding plates each have patterns at a plurality of selective regions in a plane parallel to the light output surface, the patterns being directed to light extraction and being disposed in higher density than other regions.

19 . A display apparatus provided with an illuminating unit, the illuminating unit comprising:
a light-guiding section including a plurality of light-guiding plates, the light-guiding plates being stacked in a thickness direction and each having a light entrance section and a light output surface; a plurality of light sources that output light toward the light entrance sections of the respective light-guiding plates of the light-guiding section; and a substrate that supports the plurality of light sources and on which a circuit section is disposed, the circuit section driving each of the light sources, a first portion, on which the circuit section is disposed, of the substrate being disposed in opposition to a back surface of the light-guiding section.

Assignees

• Sony Corp

Inventors

• Hirasawa Takeaki

Classifications

• F21V19/00

  Fastening of light sources or lamp holders (fastening electric light source solely by the coupling device H01R33/00 {; special means for attaching candle to candle holder F21V35/003}) · CPC title

• F21V29/508

  of electrical circuits · CPC title

• G02B6/0093

  Means for protecting the light guide · CPC title

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title

• G02B6/0085

  Means for removing heat created by the light source from the package · CPC title