Liquid crystal display device with minimized bezel

Patent metadata

Field	Value
Publication number	US-9535284-B2
Application number	US-201414586425-A
Country	US
Kind code	B2
Filing date	Dec 30, 2014
Priority date	Feb 27, 2014
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A liquid crystal display device is provided which has a minimized bezel by a reduction in the size of a guide panel. The liquid crystal display device can include a liquid crystal display panel; a light source; a light guide plate for guiding light from the light source to the liquid crystal display panel; a reflective plate below the light guide plate to reflect the light from the light guide plate; a guide panel having an upper surface on which the liquid crystal display panel is disposed; a double-sided tape for fixing the reflective plate to the guide panel; a bottom cover for receiving the light guide plate and the guide panel; and a top cover for coupling the bottom cover and the guide panel, wherein a part of the double-sided tape is extended to the light guide plate to be in contact with the light guide plate.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a liquid crystal display panel;
a light source;
a light guide plate for guiding light from the light source to the liquid crystal display panel;
a reflective plate below the light guide plate to reflect the light from the light guide plate;
a guide panel having an upper surface on which the liquid crystal display panel is disposed;
a double-sided tape for fixing the reflective plate to the guide panel, a top side of the double-sided tape being directly coupled to a bottom surface of the light guide plate, a bottom side of the double-sided tape being directly coupled to a top surface of the reflective plate;
a bottom cover for receiving the light guide plate and, the guide panel; and
a top cover for coupling the bottom cover and the guide panel,
wherein a part of the double-sided tape is extended to the light guide plate to be in contact with the light guide plate, and the adhesion of the contacting area between the light guide plate and the double-sided tape is eliminated, and
wherein an outside edge of the double-sided tape is substantially aligned horizontally with an outside edge of the guide panel.

2. The liquid crystal display device of claim 1 , wherein the light source includes at least one light emitting diode (LED) or fluorescent lamp on a side of the light guide plate.

3. The liquid crystal display device of claim 1 , further comprising:
an anti-adhesive film having a low surface energy and disposed on an entire lower surface of the light guide plate.

4. The liquid crystal display device of claim 3 , wherein the anti-adhesive film is made of a fluorine substance.

5. The liquid crystal display device of claim 1 , further comprising:
an anti-adhesive film having a low surface energy and disposed in an area of contact between a lower surface of the light guide plate and the double-sided tape.

6. The liquid crystal display device of claim 5 , wherein the anti-adhesive film is made of a fluorine substance.

7. The liquid crystal display device of claim 1 , wherein the double-sided tape comprises:
a base film;
a first adhesive layer on a lower surface of the base film;
a second adhesive layer in one area on an upper surface of the base film, the second adhesive layer being adhered to a lower surface of the guide panel; and
a dummy layer formed in another area on the upper surface of the base film, the dummy layer being in contact with a lower surface of the light guide plate.

8. The liquid crystal display device of claim 1 , wherein the double-sided tape comprises:
a base film;
a first adhesive layer on a lower surface of the base film;
a second adhesive layer on an upper surface of the base film; and
an anti-adhesive layer on an upper surface of the second adhesive layer, the anti-adhesive layer being in contact with a lower surface of the light guide plate.

9. The liquid crystal display device of claim 1 , further comprising:
an anti-adhesive substance on a first surface of the double-sided tape facing the light guide plate without being on a second surface of the double-sided tape.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Mira
• Yang Seunghoon

Classifications

• G02F1/133308 Primary

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

• G02F1/133615

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

• G02F1/133553 Primary

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title

• G02B6/0088

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

• G02B6/0081 Primary

  Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging · CPC title