Light guide plate for backlight and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-9568657-B2
Application number	US-201414223880-A
Country	US
Kind code	B2
Filing date	Mar 24, 2014
Priority date	Jun 22, 2011
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A light guide plate for a backlight. The light guide plate includes: a light source unit for generating light; a light guide plate proximate to the light source unit and including an upper surface and a lower surface; and a light emission pattern configured to diffuse a portion of the light directed toward an image display panel, and a first straight pattern configured to channel the light along a direction substantially parallel to a direction of propagation of the light generated by the light source unit, both the light emission pattern and the first straight pattern being disposed on one of the upper surface and the lower surface of the light guide plate, in which the first straight pattern has peaks and valleys formed in alternating and repeating manner in a direction substantially perpendicular to a direction of propagation of the light generated by the light source unit.

First claim

What is claimed is:

1. A light guide plate including an upper surface and a lower surface, the light guide plate comprising:
a first pattern disposed on the upper surface of the light guide plate, the first pattern having a plurality of first lenticular patterns,
a second pattern disposed on the lower surface of the light guide plate, the second pattern having a plurality of second lenticular patterns, and
a light emission pattern disposed on a peak or a valley of the second lenticular patterns of the second pattern, wherein the light emission pattern comprises a plurality of concave grooves;
wherein a pitch of the light emission pattern is at least three times that of the second lenticular patterns.

2. The light guide plate of claim 1 , wherein:
at least one first lenticular pattern is disposed in a direction perpendicular to the direction of propagation of the light, and the at least one first lenticular pattern is extended in a direction parallel to the direction of propagation of the light.

3. The light guide plate of claim 2 , wherein:
at least one second lenticular pattern is formed in a direction perpendicular to the direction of propagation of the light, and the at least one second lenticular pattern is extended in a direction parallel to the direction of propagation of the light.

4. The light guide plate of claim 1 , wherein:
an extension direction of at least one second lenticular pattern is perpendicular to the extension direction of at least one first lenticular pattern.

5. The light guide plate of claim 1 , wherein:
a diameter of at least one second lenticular pattern is half or less of a diameter of at least one first lenticular pattern.

6. The light guide plate of claim 1 , wherein:
a diameter of at least one second lenticular pattern is the same as that of at least one first lenticular pattern.

7. The light guide plate of claim 1 , wherein:
the first pattern, the second pattern and the light diffusion pattern are made of a same material.

8. A light unit, comprising:
a light source unit configured to generate light;
a light guide plate positioned proximate to the light source unit and including an upper surface and a lower surface,
a first pattern disposed on the upper surface of the light guide plate, the first pattern having a plurality of first lenticular patterns;
a second pattern disposed on the lower surface of the light guide plate, the second pattern having a plurality of second lenticular patterns, and
a light emission pattern disposed on a peak or a valley of the second lenticular patterns of the second pattern, wherein the light emission pattern comprises a plurality of concave grooves;
wherein a pitch of the light emission pattern is at least three times that of the second lenticular patterns.

9. The light unit of claim 8 , wherein:
at least one first lenticular pattern is disposed in a direction perpendicular to the direction of propagation of the light, and the at least one first lenticular pattern is extended in a direction parallel to the direction of propagation of the light.

10. The light unit of claim 9 , wherein:
at least one second lenticular pattern is formed in a direction perpendicular to the direction of propagation of the light, and the at least one second lenticular pattern is extended in a direction parallel to the direction of propagation of the light.

11. The light unit of claim 8 , wherein:
an extension direction of at least one second lenticular pattern is perpendicular to the extension direction of at least one first lenticular pattern.

12. The light unit of claim 8 , wherein:
a diameter of the second lenticular patterns is half or less of a diameter of the first lenticular patterns.

13. The light unit of claim 8 , wherein:
a diameter of the second lenticular patterns is the same as that of the first lenticular patterns.

14. The light unit of claim 8 , wherein:
the first pattern, the second pattern and the light emission pattern are made of a same material.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Min-Young
• Hwang Seong-Yong
• Kim Joong-Hyun
• Lee Sang-Won
• Choi Jin-Sung
• Ha Ju-Hwa
• Seo Jin
• Kang Yong-Kyu

Classifications

• G02B6/0036 Primary

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title

• G02B6/0043

  provided on the surface of the light guide · CPC title

• G02B6/0038

  Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide · CPC title

• G02B6/0061

  to provide homogeneous light output intensity · CPC title

• G02B6/0011 Primary

  the light guides being planar or of plate-like form · CPC title