LIGHT GUIDE PLATE AND BACKLIGHT MODULE

• US 20170045662A1
• Filed: 04/03/2015
• Published: 02/16/2017
• Est. Priority Date: 03/30/2015
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.), Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.), Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: ZHENG, Yingbo
• Application Number:
  US14/649,556
• Publication Number:
  US 20170045662A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 6/0016 Grooves, prisms, gratings, scattering particles or rough surfaces
• CPC Class Codes: G02B 6/0018 Redirecting means on the surface of the light guide
• CPC Class Codes: G02B 6/0028 Light guide, e.g. taper
• CPC Class Codes: G02B 6/0046 Tapered light guide, e.g. wedge-shaped light guide

Abstract

A light guide plate and a backlight module are provided, the light guide plate has a wedge-shaped light incident portion and a conducting portion; the wedge-shaped light incident portion includes a light incident surface and a first light guide surface; the first light guide surface is disposed on an upper side of the light incident surface, having a scattering surface for scattering the incident light and a conducting surface for directional transmission of the incident light, the scattering surface is disposed on a bright light source area, and the conducting surface is disposed on a dark light source area.

Claims

1. A light guide plate, comprising:

a wedge-shaped light incident portion, for homogenizing an incident light; and

a conducting portion, for transmitting the homogenized incident light to a corresponding liquid crystal display panel;

wherein the wedge-shaped light incident portion comprises;

a light incident surface, for receiving the incident light; and

a first light guide surface disposed on an upper side of the light incident surface, including a scattering surface for scattering the incident light and a conducting surface for directional transmission of the incident light, the scattering surface being disposed on a bright light source area of the light guide plate, and the conducting surface being disposed on a dark light source area of the light guide plate, wherein the bright light source area is an area of the light guide plate corresponding to a (light emitted diode) LED light source, the dark light source area is an area of the light guide plate corresponding to a space between two adjacent LED light sources;

wherein the light incident surface is a polished surface, a surface of the scattering surface is a polished surface, a surface of the conducting surface is provided with a first light-conducting microstructure.

2. A light guide plate, comprising:

a wedge-shaped light incident portion, for homogenizing an incident light; and

a conducting portion, for transmitting the homogenized incident light to a corresponding liquid crystal display panel;

wherein the wedge-shaped light incident portion comprises;

a light incident surface, for receiving the incident light; and

a first light guide surface disposed on an upper side of the light incident surface, including a scattering surface for scattering the incident light and a conducting surface for directional transmitting the incident light, the scattering surface being disposed on a bright light source area of the light guide plate, and the conducting surface being disposed on a dark light source area of the light guide plate, wherein the bright light source area is an area of the light guide plate corresponding to an LED light source, the dark light source area is an area of the light guide plate corresponding to a space between two adjacent LED light sources.

3. The light guide plate claimed in claim 2, wherein a surface of the scattering surface is a polished surface, and a surface of the conducting surface is provided with a first light-conducting microstructure.

4. The light guide plate claimed in claim 3, wherein the first light guide surface is perpendicular to the light incident surface.

5. The light guide plate claimed in claim 4, wherein the first light-conducting microstructure is perpendicular to the light incident surface.

6. The light guide plate claimed in claim 3, wherein the first light-conducting microstructure has a pore diameter less than 50 microns.

7. The light guide plate claimed in claim 2, wherein the wedge-shaped light incident portion further comprises:

a second light guide surface disposed on the upper side of the light incident surface, and disposed between the first light guide surface and the conducting portion, a surface of the second light guide surface being provided with a second light-conducting microstructure for directional transmission of the incident light of the bright light source area to the dark light source area.

8. The light guide plate claimed in claim 7, wherein the second light guide surface and the light incident surface form an acute angle.

9. The light guide plate claimed in claim 7, wherein the second light-conducting microstructure has a pore diameter less than 50 microns.

10. The light guide plate claimed in claim 2, wherein the light incident surface is a polished surface.

11. A backlight module, comprising an LED light source and a light guide plate, wherein the light guide plate comprises:

a wedge-shaped light incident portion, for homogenizing an incident light; and

a conducting portion, for transmitting the homogenized incident light to a corresponding liquid crystal display panel;

wherein the wedge-shaped light incident portion comprises;

a light incident surface, for receiving the incident light; and

a first light guide surface disposed on an upper side of the incident surface, including a scattering surface for scattering the incident light and a conducting surface for directional transmitting the incident light, the scattering surface is disposed on a bright light source area of the light guide plate, and the conducting surface is disposed on a dark light source area of the light guide plate, wherein the bright light source area is an area of the light guide plate corresponding to a light emitted diode (LED) light source, the dark light source area is an area of the light guide plate corresponding to a space between two adjacent LED light sources.

12. The backlight module claimed in claim 11, wherein a surface of the scattering surface is a polished surface, a surface of the conducting surface is provided with a first light-conducting microstructure.

13. The backlight module claimed in claim 12, wherein the first light guide surface is perpendicular to the light incident surface.

14. The backlight module claimed in claim 13, wherein the first light-conducting microstructure is perpendicular to the light incident surface.

15. The backlight module claimed in claim 12, wherein the first light-conducting microstructure has a pore diameter less than 50 microns.

16. The backlight module claimed in claim 11, wherein the wedge-shaped light incident portion further comprises:

a second light guide surface disposed on the upper side of the light incident surface, and disposed between the first light guide surface and the conducting portion, a surface of the second light guide surface being provided with a second light-conducting microstructure for directional transmission of the incident light of the bright light source area to the dark light source area.

17. The backlight module claimed in claim 16, wherein the second light guide surface and the light incident surface form an acute angle.

18. The backlight module claimed in claim 16, wherein the second light-conducting microstructure has a pore diameter less than 50 microns.

19. The backlight module claimed in claim 11, wherein the second light-conducting microstructure has a pore diameter less than 50 microns.