Surface light-emitting unit and display device provided with the same

Patent metadata

Field	Value
Publication number	US-9158151-B2
Application number	US-201013502693-A
Country	US
Kind code	B2
Filing date	Nov 9, 2010
Priority date	Nov 17, 2009
Publication date	Oct 13, 2015
Grant date	Oct 13, 2015

Abstract

A surface light-emitting unit of the present invention is an LED module ( 30 ) for emitting light from an LED chip ( 6 ) of a light-emitting element part ( 1 ) via a light flux control section ( 22 ) of a light flux control part ( 2 ), the light flux control section ( 22 ) being fixed by a plurality of columnar sections ( 21 ) above a fixing surface of a substrate ( 4 ) on which fixing surface the light-emitting element part ( 1 )is fixed. This provides an appropriate gap between the light-emitting element part ( 1 ) and the light flux control section ( 22 ) for heat release.

First claim

The invention claimed is:

1. A surface light-emitting unit comprising:
a fixing substrate;
a light-emitting element fixed on a fixing surface of the fixing substrate;
a light flux control member via which light from the light-emitting element is emitted, the light flux control member being supported by a plurality of support members each having a predetermined height above the fixing surface, at least one of the plurality of support members adhering to the fixing surface of the fixing substrate; and
an adhesive resin made of a resin material having a white or transparent color which exhibits a smaller amount of optical absorption at a visible light region than black, the adhesive resin being located between (i) a bottom of the at least one of the plurality of support members adhering to the fixing surface and (ii) the fixing surface.

2. The surface light-emitting unit as set forth in claim 1 , wherein each of the plurality of support members is a columnar member.

3. The surface light-emitting unit as set forth in claim 1 , wherein each of the plurality of support members is formed integrally with the light flux control member.

4. The surface light-emitting unit as set forth in claim 1 , wherein each of the plurality of support members is fixedly positioned in such a manner as to form an angle of 60° or less with respect to a long side direction of the fixing substrate which direction passes through a center of the fixing substrate in a plane view of the fixing substrate.

5. A surface light-emitting unit for emitting light from a light-emitting element via a light flux control member,
the light flux control member being supported by a plurality of support members each having a predetermined height above a fixing surface of a fixing substrate on which fixing surface the light-emitting element is fixed, and
at least one of the plurality of support members being adhered to the fixing surface of the fixing substrate via an adhesive resin made of a resin material whose color exhibits a smaller amount of optical absorption at a visible light region than black,
wherein only one of the plurality of support members is adhered and fixed to the fixing substrate via the adhesive resin.

6. A surface light-emitting unit for emitting light from a light-emitting element via a light flux control member,
the light flux control member being supported by a plurality of support members each having a predetermined height above a fixing surface of a fixing substrate on which fixing surface the light-emitting element is fixed, and
at least one of the plurality of support members being adhered to the fixing surface of the fixing substrate via an adhesive resin made of a resin material whose color exhibits a smaller amount of optical absorption at a visible light region than black,
wherein the plurality of support members are three or more support members, only two of which are adhered and fixed to the fixing substrate via the adhesive resin.

7. The surface light-emitting unit as set forth in claim 6 , wherein the fixing substrate has a strip shape, and said only two support members which are adhered and fixed to the fixing substrate via the adhesive resin are aligned in a short side direction of the fixing substrate.

8. The surface light-emitting unit as set forth in claim 1 , wherein the fixing surface of the fixing substrate has a property which exhibits a small amount of optical absorption at a visible light region.

9. The surface light-emitting unit as set forth in claim 1 , wherein a reflective sheet is provided on the fixing surface of the fixing substrate.

10. The surface light-emitting unit as set forth in claim 1 , wherein a resin material with high reflectance is applied on the fixing surface of the fixing substrate.

11. The surface light-emitting unit as set forth in claim 1 , wherein recognition patterns indicative of positions on which the plurality of support members are fixed are provided on the fixing surface of the fixing substrate.

12. The surface light-emitting unit as set forth in claim 11 , wherein each of the recognition patterns has a size which allows the recognition patterns to be covered by the adhesive resin when the plurality of support members are fixed to the fixing substrate via the adhesive resin.

13. The surface light-emitting unit as set forth in claim 11 , wherein the recognition patterns include a fluorescent material excited upon irradiation with light whose wavelength is shorter than that of visible light.

14. The surface light-emitting unit as set forth in claim 11 , wherein the recognition patterns include a light diffusing material.

15. The surface light-emitting unit as set forth in claim 11 , wherein a color of the recognition patterns is different from a color of the adhesive resin.

16. The surface light-emitting unit as set forth in claim 11 , wherein each of the recognition patterns has a ring shape at a region corresponding to an end of the plurality of support members.

17. A surface light-emitting unit for emitting light from a light-emitting element via a light flux control member,
the light flux control member being supported by a plurality of support members each having a predetermined height above a fixing surface of a fixing substrate on which fixing surface the light-emitting element is fixed, and
only one of the plurality of support members being adhered and fixed to the fixing surface of the fixing substrate via an adhesive resin.

18. A display device comprising:
a liquid crystal panel; and
a surface light-emitting unit comprising a light-emitting element and serving as a backlight for radiating light to the liquid crystal panel from a back surface thereof,
wherein the surface light-emitting unit is configured to emit light from the light-emitting element via a light flux control member, the light flux control member is supported by a plurality of support members each having a predetermined height above a fixing surface of a fixing substrate on which fixing surface the light-emitting element is fixed, at least one of the plurality of support members adheres to the fixing substrate via an adhesive resin located between each bottom of the at least one of the plurality of support members and the fixing surface so that the bottom of the at least one of the plurality of support members adheres to the fixing surface, and the adhesive resin is made of a resin material having a white or transparent color which exhibits a smaller amount of optical absorption at a visible light region than black.

Assignees

• Ogata Nobuo
• Hineno Mitsuru
• Suminoe Shinji
• Sharp Kk

Inventors

• Ogata Nobuo
• Hineno Mitsuru
• Suminoe Shinji

Classifications

• H10W90/754

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H10W90/753

  between laterally-adjacent chips · CPC title

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• H10W90/00

  Package configurations · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title