Liquid crystal display

• US 20020041268A1
• Filed: 08/31/2001
• Published: 04/11/2002
• Est. Priority Date: 09/04/2000
• Status: Active Grant

• Current Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Original Assignee: Hitachi Display Devices Limited (Hitachi, Ltd.)
• Inventors: Nishiyama, Seiichi, Yajima, Toshihiro, Takaku, Shigetake, Takeda, Yoshiharu, Noguchi, Shoichi
• Granted Patent: US 7,061,465 B2
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G02B 6/0071 with elongated shape, e.g. tube
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133613 characterized by the sequence of light sources
• CPC Class Codes: H01J 65/046 the field being produced by using capacitive means around the vessel

Abstract

There is provided a liquid crystal display device which can be lengthened in life and in which the area of its so-called a picture frame can be narrowed. The liquid crystal display device includes a liquid crystal display panel having a display part in its central portion except its periphery; and a backlight disposed on a back side of the liquid crystal display panel. The backlight includes a discharge tube having electrodes at at least its opposite ends, and the electrodes are disposed at the exterior of the discharge tube. The opposite end portions of the discharge tube where the respective electrodes are disposed are positioned to be superposed on the periphery of the liquid crystal display panel, and are bent with an angle with respect to the central axis of the discharge tube.

Claims

1. A liquid crystal display device comprising

a liquid crystal display panel having a display part in its central portion except its periphery;

and

a backlight disposed on a back side of the liquid crystal display panel,

the backlight including a discharge tube having electrodes at at least its opposite ends, the electrodes being disposed at the exterior of the discharge tube, at least one of the opposite end portions of the discharge tube where the respective electrodes are disposed being positioned to be superposed on the periphery of the liquid crystal display panel and being bent with an angle with respect to the central axis of the discharge tube.

3. A liquid crystal display device according to either of claims 1 or 2, wherein the angle with respect to the central axis of the discharge tube is greater than 0and not greater than 90.

4. A liquid crystal display device according to claim 3, wherein the angle with respect to the central axis of the discharge tube is 90.

2. A liquid crystal display device comprising:

a liquid crystal display panel having a display part in its central portion except its periphery; and

a backlight disposed on a back side of the liquid crystal display panel,

the backlight including a discharge tube having electrodes at at least its opposite ends, the electrodes being disposed at the exterior of the discharge tube, at least one of the opposite end portions of the discharge tube where the respective electrodes are disposed being positioned to be superposed on the periphery of the liquid crystal display panel and being bent with an angle with respect to the central axis of the discharge tube in a plane parallel to the liquid crystal display panel.

5. A liquid crystal display device comprising:

a liquid crystal display panel having a display part in its central portion except its periphery; and

a backlight disposed on a back side of the liquid crystal display panel,

the backlight including a discharge tube having electrodes at at least its opposite ends, the electrodes being disposed at the exterior of the discharge the tube, at least one of the opposite end portions of the discharge tube where the respective electrodes are constructed as a bent portion which is bent with an angle with respect to the central axis of the discharge tube, at least the portion of the bent portion where the electrode is formed being superposed in the area of the display part of the liquid crystal display panel.

6. A liquid crystal display device according to either of claim 5, wherein at least one of the opposite end portions of the discharge tube where the respective electrodes are disposed is bent at greater than 90and not greater than 180with respect to the central axis of the discharge tube.

7. A liquid crystal display device according to claim 5, wherein at least one of the opposite end portions of the discharge tube where the respective electrodes are disposed is bent at 180with respect to the central axis of the discharge tube toward the opposite side to the liquid crystal display panel.

8. A liquid crystal display device comprising:

a liquid crystal display panel having a display part in its central portion except its periphery; and

a backlight disposed on a back side of the liquid crystal display panel,

the backlight including a light source made of a discharge tube having an endless-ring-like shape and electrodes disposed in a portion of the exterior of the discharge tube,

the electrodes being disposed to be positioned on an are a outside the display part of the liquid crystal display panel.

9. A liquid crystal display device comprising:

a liquid crystal display panel having a display part in its central portion except its periphery; and

a backlight disposed on a back side of the liquid crystal display panel,

the backlight including a discharge tube having electrodes at at least its opposite ends, the electrodes being disposed at the exterior of the discharge tube, at least one of the opposite end portions of the discharge tube where the respective electrodes are disposed being positioned to be superposed on the periphery of the liquid crystal display panel and being formed in a helical shape.

10. A liquid crystal display device comprising:

a liquid crystal display panel having a display part in its central portion except its periphery; and

a backlight disposed on a back side of the liquid the crystal display panel,

the backlight including a discharge tube having electrodes at at least its opposite ends, the electrodes being disposed at the exterior of the discharge the tube, at least one of the opposite end portions of the discharge tube where the respective electrodes are disposed being positioned to be superposed on the periphery of the liquid crystal display panel and being formed to have an inner diameter greater than that of the other portion.