ILLUMINATING LAMP FOR A DISPLAY DEVICE, AN ILLUMINATING DEVICE FOR A DISPLAY DEVICE, AND A DISPLAY DEVICE

• US 20090033234A1
• Filed: 07/18/2006
• Published: 02/05/2009
• Est. Priority Date: 07/15/2005
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Iwamoto, Kenichi
• Granted Patent: US 7,794,096 B2
• Time in Patent Office: Days
• US Class Current: 315/189
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133613 characterized by the sequence of light sources
• CPC Class Codes: H05B 41/245 for a plurality of lamps

Abstract

An illuminating lamp for a display device is capable of minimizing a luminance difference between a high-voltage driving side and a low-voltage driving side. The illuminating lamp is arranged behind a display panel via optical sheets and driven in a high-voltage driving method. The illuminating lamp includes discharge lamps connected in series, wherein gas pressures of the discharge lamps at a high-voltage driving side are set to be higher than those of the discharge lamps at a low-voltage driving side.

Claims

1-6. -6. (canceled)

7. An illuminating lamp for a display device, comprising:

discharge lamps connected in series;

wherein gas pressures of the discharge lamps at a high-voltage driving side are higher than gas pressures of the discharge lamps at a low-voltage driving side.

8. The illuminating lamp for a display device according to claim 7, wherein a potential of the discharge lamps connected in series is floated at the low-voltage driving side.

9. The illuminating lamp for a display device according to claim 7, wherein a potential of the discharge lamps connected in series is grounded at the low-voltage driving side.

10. The illuminating lamp for a display device according to claim 7, wherein the discharge lamps connected in series are arranged in a zigzag configuration.

11. An illuminating device for a display device comprising the illuminating lamp for a display device according to claim 7, wherein the illuminating device for a display device is arranged behind a display panel.

12. A display device comprising the illuminating device for a display device according to claim 11.