Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10018778-B2
Application number	US-201615287226-A
Country	US
Kind code	B2
Filing date	Oct 6, 2016
Priority date	Dec 29, 2015
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

Provided is a liquid crystal display device. The liquid crystal display device includes: a liquid crystal display panel; a light source under the liquid crystal display panel; a light guiding plate; a reflecting plate; a guide mold; and a supporting member. The light guiding plate is in contact with one surface of the light source. The reflecting plate is disposed under the light guiding plate. The guide mold accommodates the light source, the light guiding plate, and the reflecting plate therein. The supporting member is disposed under the reflecting plate and supports at least a part of one surface of the reflecting plate.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a light source under a liquid crystal display panel;
a light guiding plate in contact with one surface of the light source;
a reflecting plate under the light guiding plate;
a guide mold that accommodates the light source, the light guiding plate, and the reflecting plate therein;
a bonding member, positioned between the light guiding plate and the reflecting plate, configured to form a gap between the light guiding plate and the reflecting plate,
wherein the bonding member is excluded in a light-entry area where a light is configured to be emitted from the light source; and
a supporting member is positioned under the reflecting plate and is disposed in the light-entry area, and the supporting member is configured to support at least a part of one surface of the reflecting plate.

2. The liquid crystal display device according to claim 1 , wherein the light source is disposed along one lateral surface of the guide mold, and
the supporting member is in a space between the one surface of the light source and an interface spaced away from the one surface of the light source at a first distance and supports the one surface of the reflecting plate.

3. The liquid crystal display device according to claim 2 , wherein the first distance is greater than 0.75 mm.

4. The liquid crystal display device according to claim 1 , wherein the supporting member bonds the reflecting plate to the guide mold.

5. The liquid crystal display device according to claim 1 , further comprising:
a flexible printed circuit board which is connected to the light source and in contact with one surface of the guide mold,
wherein the reflecting plate is spaced away from the one surface of the guide mold.

6. The liquid crystal display device according to claim 5 ,
wherein the bonding member bonds the reflecting plate to the light guiding plate, and
wherein the bonding member is disposed on a back surface of the light guiding plate along three-sided edges of the light guiding plate.

7. The liquid crystal display device according to claim 6 , wherein a distance between the reflecting plate and the light guiding plate is uniform in the area where the supporting member is disposed.

8. A liquid crystal display device comprising:
a light source under a liquid crystal display panel;
a light guiding plate configured to change a path of a light emitted from the light source;
a reflecting plate which is under the light guiding plate and configured to reflect a light;
a bonding member positioned between the light guiding plate and the reflecting plate so as to form a gap between the light guiding plate and the reflecting plate; and
a supporting member which flattens an upper surface of the reflecting plate to minimize concentration of a light, which is emitted from the light source and reflected by the reflecting plate, in a specific area of the liquid crystal display panel,
wherein the bonding member is positioned in other area except a light-entry area where a light is emitted from the light source and
wherein the supporting member is positioned in the light-entry area.

9. The liquid crystal display device according to claim 8 , wherein the supporting member is configured to flatten the upper surface of the reflecting plate within the specific area from the one surface of the light source that emits a light.

10. The liquid crystal display device according to claim 9 , wherein the reflecting plate and the light guiding plate are bonded to each other by the bonding member in any area other than the specific area, and
the supporting member is configured to minimize a curve of the reflecting plate in the specific area.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Minji

Classifications

• G02B6/002

  by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces · CPC title

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• G02B6/0091 Primary

  of the light source relative to the light guide (G02B6/0021 takes precedence) · CPC title

• G02B6/0088

  of the light guide or other optical sheets in the package · CPC title

• G02F1/133615 Primary

  Edge-illuminating devices, i.e. illuminating from the side · CPC title