Display device

Patent metadata

Field	Value
Publication number	US-10775552-B2
Application number	US-201616069330-A
Country	US
Kind code	B2
Filing date	Nov 11, 2016
Priority date	Feb 9, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A heat sink 41 is provided on a lower edge side, for example, of a display panel 21 with a heat radiation surface being on a display surface side of the display panel 21. A heat source, such as a light source 22, which generates heat owing to display operation using the display panel 21 is mounted on a mounting face opposite to the heat radiation surface. A cover 31 that covers the heat sink 41 is provided on the display surface side of the display panel 21. Air holes 311 and 312 are formed on a top face 31t and a bottom face 31b, respectively, of the cover 31. Air taken in through the air holes 312 on the bottom face 31b of the cover 31 cools the heat sink 41, and the air heated by the heat of the heat sink 41 is dissipated outside through the air holes 311 on the top face 31t. Heat generated inside the display device is efficiently dissipated with a small ventilation resistance without generation of noise. Since heat is dissipated on the display surface side, discoloration of wall paper on a mounting face and the like is prevented or reduced.

First claim

The invention claimed is:

1. A display device comprising:
a heat sink part provided on a side of a lower edge or a side of an upper edge of a display panel, a heat radiation surface of the heat sink part being on a display surface side of the display panel, a heat source that generates heat owing to operation using the display panel being mounted on a surface of the heat sink part different from the heat radiation surface; and
a cover provided on the display surface side of the display panel to cover the heat sink part, the cover having a top face and a bottom face each having air holes, and
wherein,
the display panel is a non-emissive display panel, and
the heat source is a light source that outputs light to illuminate the display panel.

2. The display device according to claim 1 ,
wherein the heat sink part includes a plurality of heat sinks connected in a direction along the lower edge or the upper edge of the display panel, a coupling portion formed on each of the heat sinks being coupled to a coupling portion formed on another of the heat sinks.

3. The display device according to claim 2 ,
wherein the coupling portions connect the plurality of heat sinks such that the plurality of heat sinks can be elongated and contracted in the direction along the lower edge or the upper edge of the display panel.

4. The display device according to claim 2 ,
wherein the coupling portions prevents curving of at least one of the plurality of heat sinks in a first direction perpendicular to the heat radiation surface at the coupling portions of the plurality of heat sinks.

5. The display device according to claim 4 ,
wherein the coupling portions each have a first engagement piece protruding on a heat radiation surface side of a coupling face of the heat sink and a second engagement piece protruding on a side opposite to the heat radiation surface side,
the first engagement piece and the second engagement piece are arranged at predetermined intervals, positions of inner faces of the first engagement piece and the second engagement piece being in alignment with one another, and
a first heat sink and a second heat sink are connected such that inner faces of a first engagement piece of the first heat sink and a second engagement piece of the second heat sink face each other and that inner faces of a second engagement piece of the first heat sink and a first engagement piece of the second heat sink face each other, so that curving in a second direction perpendicular to the display surface at the coupling portions is prevented.

6. The display device according to claim 2 ,
wherein radiating fins are formed on the heat radiation surface of the heat sink, and
the radiating fins of the heat sink are located between the air holes on the bottom face and the air holes on the top face of the cover.

7. The display device according to claim 1 ,
wherein the light source is fixed to the heat sink with a buffer member having a predetermined thermal conductivity and absorbing a difference in thermal expansion between the light source and the heat sink.

8. The display device according to claim 7 ,
wherein the buffer member is thermally-conductive grease.

9. The display device according to claim 1 ,
wherein the light source includes light emitting elements that emit light to illuminate the display panel, a board on which the light emitting elements are mounted, a light guide part to guide light emitted from the light emitting elements to a light guide plate provided on a back surface of the display panel, and a resin mold that integrally fixes the light guide part onto the board, and
the light source is provided between an inner face side of a back chassis and the heat sink, the back chassis being provided on a side opposite to the display surface side of the display panel, the board facing the heat sink, the resin mold facing the back chassis.

10. The display device according to claim 1 ,
wherein a back chassis is provided on a side opposite to the display surface side of the display panel, and the heat sink is fixed to the back chassis.

11. The display device according to claim 10 ,
wherein the back chassis has a structure including metal sheets, and a heat insulating layer between the metal sheets.

12. The display device according to claim 1 ,
wherein the heat source and the heat sink part are provided on each side of each lower edge and the side of the upper edge of the display panel, and the heat source is mounted on the heat sink part at each of the lower edge side and the upper edge side.

13. A display device, comprising:
a heat sink part provided on a side of a lower edge or a side of an upper edge of a display panel, a heat radiation surface of the heat sink part being on a display surface side of the display panel, a heat source that generates heat owing to operation using the display panel being mounted on a surface of the heat sink part different from the heat radiation surface; and
a cover provided on the display surface side of the display panel to cover the heat sink part, the cover having a top face and a bottom face each having air holes, and
wherein,
the heat source is a light source that outputs light to illuminate the display panel,
the display panel is an emissive display panel, and
the heat source includes a drive circuit that drives the display panel.

Assignees

• Sony Corp

Inventors

• Kobayashi Naoto
• Nakagawa Makoto
• Yano Tomoya

Classifications

• G02F1/133308 Primary

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/133628

  with cooling means · CPC title

• G02F1/13332

  Front frames · CPC title

• G02F2201/36

  Airflow channels, e.g. constructional arrangements facilitating the flow of air · CPC title

• H05K7/20

  Modifications to facilitate cooling, ventilating, or heating · CPC title