LIQUID CRYSTAL DISPLAY DEVICE MODULE

• US 20130016307A1
• Filed: 07/10/2012
• Published: 01/17/2013
• Est. Priority Date: 07/11/2011
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Jeong, Haehyeon, Kim, Jaebum
• Granted Patent: US 9,366,901 B2
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/13332 Front frames
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/13718 based on a change of the texture state of a cholesteric liquid crystal

Abstract

A liquid crystal display (LCD) device module capable of implementing a transparent display using reflection and transmission properties of cholesteric liquid crystal includes a liquid crystal display panel, a backlight unit disposed at one side surface of the liquid crystal panel to emit light directly to the side surface, and a supporting structure to support and secure the liquid crystal display panel and the backlight unit. A light guide plate is not provided at a rear surface of the liquid crystal display panel. A backlight unit faces the side surface of the liquid crystal display panel so that light can be incident directly onto the liquid crystal panel to generate an image, resulting in image enhanced with visibility and transparency of the liquid crystal display panel.

Claims

1. A liquid crystal display device module comprising:

a liquid crystal display panel;

a backlight unit disposed at one side surface of the liquid crystal display panel to emit light directly onto the side surface; and

a supporting structure to support and secure the liquid crystal display panel and the backlight unit,

wherein the backlight unit is surrounded by the supporting structure and the side surface of the liquid crystal display panel.

2. The module of claim 1, wherein the liquid crystal display panel is exposed to outside.

3. The module of claim 2, wherein the supporting structure comprises:

a top case to cover front edge portions of the liquid crystal display panel; and

a guide panel to cover rear edge portions of the liquid crystal display panel and having the backlight unit mounted thereon to face the side surface of the liquid crystal display panel, the guide panel physically coupled to the top case.

4. The module of claim 3, wherein the supporting structure may include a light shielding tape to secure the top case to the liquid crystal panel.

5. The module of claim 3, wherein the liquid crystal display panel comprises:

a lower substrate;

an upper substrate facing the lower substrate; and

a cholesteric liquid crystal layer interposed between the lower substrate and the upper substrate.

6. The module of claim 5, wherein the backlight unit comprises:

one or more light sources; and

a Light Emitting Diode (LED) array for mounting the light sources in a serially aligned manner.

7. The module of claim 6, wherein the backlight unit further comprises:

a lamp housing configured to mount the light sources and the LED array, the lamp housing reflecting light emitted from the light sources toward the side surface of the liquid crystal display panel.

8. The module according to claim 7, wherein the cholesteric liquid crystal layer operates in:

a first state of transmitting light incident from one surface thereof to the other surface according to an electric field formed; and

a second state of scattering and reflecting light incident from one surface thereof.

9. The module according to claim 8, wherein the first state indicates that the cholesteric liquid crystal layer is in a planar state, and the second state indicates that the cholesteric liquid crystal layer is in a focal conic state.