Reflector formed with highly reliable conductive pattern, process for fabricating reflector and liquid crystal display unit using the same

• US 20050083458A1
• Filed: 11/10/2004
• Published: 04/21/2005
• Est. Priority Date: 07/06/2000
• Status: Active Grant

• Current Assignee: Vista Peak Ventures LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: NEC LCD Technologies Limited (NEC Corporation)
• Inventors: Kaneko, Hideki, Sato, Yasuhiro, Nishiyama, Michiaki
• Granted Patent: US 7,136,123 B2
• Time in Patent Office: Days
• US Class Current: 349/113
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0071 with elongated shape, e.g. tube
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

A reflector is incorporated in a liquid crystal display panel for directing light to an optical path from a lamp to a liquid crystal panel, and a high voltage line is directly connected to an electrode of the lamp, but a low voltage line is connected through a conductive pattern formed on the reflector to the other electrode of the lamp, wherein the conductive pattern is formed from a layer of conductive filler printed on the reflector through thermosetting so that the conductive pattern is thick enough to withstand thermal stress without enlargement of the liquid crystal display unit.

Claims

1-15. -15. (canceled)

16. A process for producing a reflector, comprising:

forming an insulating member from a first synthetic resin;

printing a conductive filler on a surface of said insulating member; and

solidifying said conductive filler on said surface for producing a conductive pattern.

17. The process as set forth in claim 16, in which said first synthetic resin comprises a thermoplastic resin, and said conductive pattern comprises a second synthetic resin implementing a thermosetting resin containing a conductive material.

18. The process as set forth in claim 17, in which said thermoplastic resin is selected from the group consisting of polyethylene terephthalate resin and polycarbonate resin, and said conductive filler contains modified copolymerized polyester, silver and carbon.

19. The process as set forth in claim 16, in which said forming includes:

heating said first insulating resin for producing a soft insulating resin,

extruding said soft insulating resin for forming a hot bar member, and

cooling said hot bar member for producing said insulating member.

20. The process as set forth in claim 16, in which said forming includes:

heating said first insulating resin for producing a soft insulating resin, and

extruding said soft insulating resin for forming a hot bar member serving as said insulating member.

21. The process as set forth in claim 16, in which said conductive filler is printed by using a dispenser.