Liquid crystal display

• US 6,342,932 B1
• Filed: 11/12/1999
• Issued: 01/29/2002
• Est. Priority Date: 11/12/1998
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Terao, Shinichi, Furukawa, Katsuhisa, Masutani, Yutaka, Kitamura, Toshiyasu
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): NGUYEN, DUNG T
• Application Number:
  US09/438,594
• Time in Patent Office: 809 Days
• Field of Search: 349/58, 349/59, 349/60, 349/149, 349/150, 349/152, 439/67, 439/493, 439/66, 361/820, 361/760, 361/783, 361/767, 361/807, 361/808, 361/752
• US Class Current: 349/58
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 3/365 by abutting, i.e. without alloying process

Abstract

A liquid crystal display device has: a liquid crystal display unit 11; a flexible circuit board 12 which is connected to the liquid crystal display unit 11, contact portions being formed in a tip end portion of the flexible circuit board, the flexible circuit board being bent back outside a holding member 10; the holding member 10 which holds the liquid crystal display unit 11; a printed circuit board 20 to which the holding member 10 is attached, and on which contact portions are exposed; conductor-embedded elastic members 30 through which the contact portions on the printed circuit board 20 are connected to the contact portions of the flexible circuit board 12, respectively; and a corrugated elastic member 40 which is interposed between the holding member 10 and the flexible circuit board 12 to press the flexible circuit board 12. The flexible circuit board 12 is bent back outside the holding member 10 and urged by the corrugated elastic member 40, whereby the printed circuit board 20 is electrically connected to the flexible circuit board 12.

Claims

1. A liquid crystal display device comprises:

a liquid crystal display unit;

a holding member which houses and holds said liquid crystal display unit;

a flexible circuit board which is connected to said liquid crystal display unit, first contact portions being formed in an edge portion of said flexible circuit board;

a printed circuit board to which said holding member is attached, and on which second contact portions are exposed;

conductor-embedded elastic members by which said second contact portions on said printed circuit board are connected to said first contact portions of said flexible circuit board, respectively; and

a corrugated elastic member which is interposed between said holding member and said flexible circuit board to press said flexible circuit board;

wherein said flexible circuit board is bent back outside said holding member and urged by said corrugated elastic member, whereby said printed circuit board is electrically connected to said flexible circuit board.

2. A liquid crystal display device comprises:

a holding member in which a positioning boss is erected from a rear side, and which has a hook in a bottom portion; and

a flexible circuit board which is electrically connected to transparent electrodes via a conductive adhesive agent, and in which, in an edge portion that is bent into a substantially U-like shape, a first positioning hole and first contact portions are formed, said first contact portions being connected to conductor-embedded elastic members described later; and

said holding member houses and holds, on a front side, a light guiding plate, and a liquid crystal display unit in which a liquid crystal composition is filled between a pair of substrates having transparent electrodes on inner faces, and, on said rear side, said edge portion of said flexible circuit board is fixed by passing said boss through said first positioning hole, and a main printed circuit board comprises a light emitting element, a second positioning hole, and second contact portions exposed on said printed circuit board;

wherein said liquid crystal display unit held by said holding member is attached and connected to said printed circuit board by;

passing said positioning boss of said holding member through said second positioning hole of said printed circuit board;

engaging said hook with a predetermined position of said printed circuit board; and

interposing a corrugated elastic member between said rear side of said holding member and said flexible circuit board, whereby said first contact portions disposed on said flexible circuit board are connected to said second contact portions disposed on said printed circuit board, through conductor-embedded elastic members.

3. A liquid crystal display device according to claim 2, wherein said corrugated elastic member which is interposed between said holding member and said flexible circuit board is configured evenly in a lateral direction across said boss, and said first contact portions disposed on said flexible circuit board are arranged evenly in a lateral direction along a short side of said flexible circuit board.

4. A liquid crystal display device according to claim 2, wherein said light emitting element disposed on said printed circuit board is housed in said holding member, and light emitted from said housed light emitting element is guided to said light guiding plate via a reflecting surface formed on said holding member.

5. A portable telephone comprising a liquid crystal display device comprising:

a liquid crystal display unit;

a holding member which houses and holds said liquid crystal display unit;

a flexible circuit board which is connected to said liquid crystal display unit, first contact portions being formed in an edge portion of said flexible circuit board;

a printed circuit board to which said holding member is attached, and on which second contact portions are exposed;

conductor-embedded elastic members by which said second contact portions on said printed circuit board are connected to said first contact portions of said flexible circuit board, respectively; and

a corrugated elastic member which is interposed between said holding member and said flexible circuit board to press said flexible circuit board;

wherein said flexible circuit board is bent back outside said holding member and urged by said corrugated elastic member, whereby said printed circuit board is electrically connected to said flexible circuit board.

6. A portable telephone comprising a liquid crystal display device comprising:

a holding member in which a positioning boss is erected from a rear side, and which has a hook in a bottom portion; and

a flexible circuit board which is electrically connected to transparent electrodes via a conductive adhesive agent, and in which, in an edge portion that is bent into a substantially U-like shape, a first positioning hole and first contact portions are formed, said first contact portions being connected to conductor-embedded elastic members described later; and

said holding member houses and holds, on a front side, a light guiding plate, and a liquid crystal display unit in which a liquid crystal composition is filled between a pair of substrates having transparent electrodes on inner faces, and, on said rear side, said edge portion of said flexible circuit board is fixed by passing said boss through said first positioning hole, and a main printed circuit board comprises a light emitting element, a second positioning hole, and second contact portions exposed on said printed circuit board;

wherein said liquid crystal display unit held by said holding member is attached and connected to said printed circuit board by;

passing said positioning boss of said holding member through said second positioning hole of said printed circuit board;

engaging said hook with a predetermined position of said printed circuit board; and

interposing a corrugated elastic member between said rear side of said holding member and said flexible circuit board, whereby said first contact portions disposed on said flexible circuit board are connected to said second contact portions disposed on said printed circuit board, through conductor-embedded elastic members.

7. A portable telephone as claimed in claim 6, wherein said corrugated elastic member which is interposed between said holding member and said flexible circuit board is configured evenly in a lateral direction across said boss, and said first contact portions disposed on said flexible circuit board are arranged evenly in a lateral direction along a short side of said flexible circuit board.

8. A portable telephone as claimed in claim 6, wherein said light emitting element disposed on said printed circuit board is housed in said holding member, and light emitted from said housed light emitting element is guided to said light guiding plate via a reflecting surface formed on said holding member.