Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10663786-B2
Application number	US-201916366864-A
Country	US
Kind code	B2
Filing date	Mar 27, 2019
Priority date	Mar 29, 2018
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

In a liquid crystal display device including a liquid crystal panel displaying an image and an LED and an IC driver which is a heat generating component generating heat during operation, the liquid crystal panel includes a pair of substrates that are disposed opposite each other, and a liquid crystal layer containing liquid crystal molecules and sealed between the pair of substrates, and a transparent thermal conducing sheet is disposed such that a part thereof is continuous from the LED and the IC driver and another part thereof is directly in contact with a TFT substrate to cover a display area.

First claim

The invention claimed is:

1. A liquid crystal display device comprising:
a liquid crystal panel displaying an image; and
one heat generating component or multiple heat generating components that generates/generate heat during operation, wherein
the liquid crystal panel includes
a pair of substrates that are disposed opposite each other, and
a liquid crystal layer containing liquid crystal molecules and being sealed between the pair of substrates, and

a transparent thermal conducing sheet is disposed such that a part thereof is continuous from the heat generating component and another part thereof is directly in contact with at least one of the pair of substrates to cover a display area.

2. The liquid crystal display device according to claim 1 , wherein
the liquid crystal panel further includes a polarizing plate, and
the thermal conducting sheet is disposed between the one of the substrates and the polarizing plate.

3. The liquid crystal display device according to claim 1 , wherein the thermal conducting sheet functions as a polarizing plate.

4. The liquid crystal display device according to claim 1 , further comprising a backlight unit including a light source and supplying light to the liquid crystal panel, wherein
at least one of the heat generating components is the light source of the backlight unit.

5. The liquid crystal display device according to claim 4 , further comprising a liquid crystal panel fixing member that fixes the liquid crystal panel and the backlight unit, the liquid crystal panel fixing member being formed from a thermal conducting material and disposed to be directly in contact with a light source substrate on which the light source is mounted and the thermal conducting sheet.

6. The liquid crystal display device according to claim 1 , wherein at least one of the heat generating components is disposed on the one of the substrates, and the thermal conducting sheet extends to overlap an arrangement position of the heat generating component in a plan view.

7. The liquid crystal display device according to claim 1 , wherein the thermal conducting sheet includes insulating substances.

8. The liquid crystal display device according to claim 1 , wherein the thermal conducting sheet is formed by mixing transparent fillers with transparent resin.

9. The liquid crystal display device according to claim 6 , wherein
the heat generating component is an IC driver that is configured to generate output signals that is output to the display area of the liquid crystal panel, and
the display area displays an image when the output signals are applied to the display area.

Assignees

• Sharp Kk

Inventors

• Kuwamura Yohji
• Ohhara Kohichi
• Handa Takuya

Classifications

• G02F1/133528

  Polarisers · CPC title

• G02F1/133382 Primary

  Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell · CPC title

• G02F1/133308

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

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title

• H05K7/20963

  Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20972 takes precedence) · CPC title