Backlight device of liquid crystal display device and method fabricating the same

• US 7,220,039 B2
• Filed: 09/25/2003
• Issued: 05/22/2007
• Est. Priority Date: 09/26/2002
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Yang, Seung Hoon, Ahn, In Ho, Kim, Jae Burn
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): HAN, JASON
• Application Number:
  US10/670,057
• Publication Number:
  US 20040070966A1
• Time in Patent Office: 1,335 Days
• Field of Search: 362/27, 362/612, 362/555, 362/800, 362/228, 362/231, 362/252, 362/349, 349 68- 69
• US Class Current: 362/612
• CPC Class Codes: G02B 6/0028 Light guide, e.g. taper
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0086 Positioning aspects
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A backlight device for a liquid crystal includes a substrate, a light source including a first plurality of green light emitting diodes, a second plurality of blue light emitting diodes, and a third plurality of red light emitting diodes arranged along a first row direction on the substrate in an offset matrix-type configuration, wherein white light emitting diodes are disposed at both ends of the configuration of the green, blue, and red light emitting diodes.

Claims

1. A backlight device for a liquid crystal display, comprising:

a substrate;

a light source including a first plurality of green light emitting diodes, a second plurality of blue light emitting diodes, and a third plurality of red light emitting diodes arranged along a first row direction on the substrate in an offset matrix-type configuration,

wherein white light emitting diodes are disposed exclusively at both ends of the configuration of the green, blue, and red light emitting diodes.

2. The device according to claim 1, wherein a first total number of the first plurality of green light-emitting diodes is larger than a second total number of the second plurality of blue light emitting diodes, and a third total number of the third plurality of red light emitting diodes is smaller than each of the first and second total numbers.

3. A backlight device for a liquid crystal display, comprising:

a substrate; and

a light source including a plurality of blocks each having a plurality of green, blue, and red light emitting diodes disposed on the substrate in an offset matrix-type configuration, and white light emitting diodes disposed exclusively at both ends of the configuration of the green, blue, and red light emitting diodes.

4. The device according to claim 3, wherein each block includes a total of six of the green, blue, and red light-emitting diodes.

5. The device according to claim 3, wherein each block includes three green light-emitting diodes, two blue light-emitting diodes, and one red light-emitting diode.

6. The device according to claim 3, wherein each block includes a first row having a first sequential arrangement of the plurality of light-emitting diodes in a first order of the green, blue, and green light-emitting diodes, and a second row having a second sequential arrangement of the plurality of light-emitting diodes in a second order of the blue, green, and red light-emitting diodes.

7. A method of fabricating a backlight device for a liquid crystal display, comprising:

forming a light source including a first plurality of green light emitting diodes, a second plurality of blue light emitting diodes, and a third plurality of red light emitting diodes arranged along a first row direction on a substrate in an offset matrix-type configuration,

wherein white light emitting diodes are disposed exclusively at both ends of the configuration of the green, blue, and red light emitting diodes.

8. The method according to claim 7, wherein a first total number of the first plurality of green light-emitting diodes is larger than a second total number of the second plurality of blue light emitting diodes, and a third total number of the third plurality of red light emitting diodes is smaller than each of the first and second total numbers.

9. A method of fabricating a backlight device for a liquid crystal display, comprising:

forming a light source including a plurality of blocks each having a plurality of green, blue, and red light-emitting diodes disposed on the substrate in an offset matrix-type configuration, and white light-emitting diodes disposed exclusively at both ends of the configuration of the green, blue, and red light-emitting diodes.

10. The method according to claim 9, wherein each block includes a total of six of the green, blue, and red light-emitting diodes.

11. The method according to claim 9, wherein each block includes three green light emitting diodes, two blue light emitting diodes, and one red light emitting diode.

12. The method according to claim 9, wherein each block includes a first row having a first sequential arrangement of the plurality of light emitting diodes in a first order of the green, blue, and green light emitting diodes, and a second row having a second sequential arrangement of the plurality of light emitting diodes in a second order of the blue, green, and red light emitting diodes.