Liquid crystal display and apparatus using the same

• US 6,025,644 A
• Filed: 03/02/1998
• Issued: 02/15/2000
• Est. Priority Date: 03/29/1996
• Status: Expired due to Term

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Imaeda, Chiaki
• Primary Examiner(s): Saadat, Mahshid
• Assistant Examiner(s): CLARK, JASMINE JHIHAN B
• Application Number:
  US08/952,683
• Time in Patent Office: 715 Days
• Field of Search: 257/723, 257/81, 257/99, 257/89, 257/678
• US Class Current: 257/723
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 3/325 by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor adaptations of leads inserted in holes for press-fit connections H05K3/308

Abstract

A high-reliability COG-type liquid crystal display device is produced with a high production yield without using a thermo-compression bonding process thereby preventing the connection of a liquid crystal driver IC from encountering a failure which would otherwise occur due to a high temperature in the thermo-compression bonding process. The liquid crystal display device comprises a pair of substrates (13, 14) facing each other via a liquid crystal, at least a liquid crystal driver IC (7) mounted on one substrate (13) by means of direct connection to the one substrate (13), and a plurality of semiconductor input terminals (21) formed on the substrate (13) so that signals are applied to the IC (7) via the semiconductor input terminals (21). The semiconductor input terminals (21) of the liquid crystal panel (8) are connected to semiconductor driving output terminals (6) of a portable telephone device or the like via an elastic connector (12). The elastic connector (12) includes a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately. The terminals located at opposite locations are electrically connected to each other via the conductor elements while adjacent terminals are electrically isolated from each other by the electrically-insulating elements.

Claims

1. A liquid crystal display device comprising:

a pair of substrates facing each other via a liquid crystal;

a semiconductor device directly connected at least to one substrate; and

a plurality of semiconductor input terminals formed on the substrate so that signals may be applied to the semiconductor input terminals, a light source for emitting light, a light guide for guiding the light emitted from said light source, and a hole formed in said light guide for receiving an elastic connector;

said semiconductor input terminals being connected to semiconductor driving output terminals formed on an apparatus using the liquid crystal display device,

wherein said semiconductor input terminals and said semiconductor driving output terminals are connected to each other via said elastic connector having a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately.

2. A liquid crystal display device according to claim 1, wherein said plurality of semiconductor input terminals are divided into a plurality of groups located at both sides of the semiconductor device, and a plurality of elastic connectors are disposed at locations corresponding to said groups.

3. A liquid crystal display device according to claim 1, wherein a protrusion extending toward said elastic connector located in said hole is formed in said hole.

4. An apparatus using a liquid crystal display device, said apparatus including a plurality of semiconductor driving output terminals to which said liquid crystal display device is connected,

said liquid crystal display device comprising:

a pair of substrates facing each other via a liquid crystal;

a semiconductor device directly connected at least to one substrate; and

a plurality of semiconductor input terminals formed on the substrate so that signals may be applied to the semiconductor device via said semiconductor input terminals,

a shielding case located at the front of said liquid crystal display device, and a pressure member located between said shielding case and said liquid crystal display device,

wherein said semiconductor input terminals and said semiconductor driving output terminals are connected to each other via an elastic connector having a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately;

wherein said plurality of semiconductor driving output terminals are formed on a main board disposed at the back of said liquid crystal display device and said plurality of semiconductor driving output terminals are connected to a control circuit for controlling said semiconductor device; and

said elastic connector is supported between said main board and said substrate on which the semiconductor device is connected; and

wherein said elastic connector is fixed by pressing via said pressure member thereby connecting said semiconductor input terminals to said semiconductor output terminals.

5. A liquid crystal display device comprising:

a pair of substrates facing each other via a liquid crystal;

a semiconductor device directly connected to at least one of said pair of substrates;

a plurality of semiconductor input terminals formed on said at least one substrate so that signals may be applied to said semiconductor device;

an elastic connector including a plurality of conductor elements and a plurality of electrically-insulating elements which are alternately disposed for coupling with semiconductor driving output terminals formed on an apparatus using said liquid crystal display device;

a light source for emitting light; and

a light guide for guiding the light emitted from said light source and said light guide having a hole for receiving said elastic connector.

6. An apparatus comprising:

a plurality of semiconductor driving output terminals;

a liquid crystal display device including a plurality of semiconductor input terminals for applying signals to a semiconductor device connected thereto, said plurality of semiconductor input terminals being connected to said plurality of semiconductor driving output terminals by an elastic connector having a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately; and

a shielding case located at the front of said liquid crystal display device and a pressure member located between said shielding case and said liquid crystal display device;

wherein said elastic connector is fixed by pressing via said pressure member thereby connecting said semiconductor input terminals to said semiconductor output terminals.

7. An apparatus using a liquid crystal display device, said apparatus including a plurality of semiconductor driving output terminals to which said liquid crystal display device is connected, said liquid crystal display device comprising:

a pair of substrates facing each other via a liquid crystal;

a semiconductor device directly connected at least to one substrate;

a plurality of semiconductor input terminals formed on the substrate so that signals may be applied to the semiconductor device via said semiconductor input terminals, said semiconductor input terminals and said semiconductor driving output terminals being connected to each other via an elastic connector having a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately; and

a shielding case located at a front of said liquid crystal display device;

wherein said plurality of semiconductor driving output terminals are formed on a connection circuit board for connecting said semiconductor device to a main board to which a control circuit for controlling said semiconductor device is connected; and

said connection circuit board is located between said elastic connector and said shielding case, and said elastic connector is pressed by said shielding case and said substrate to which said semiconductor device is connected, thereby fixing said connection circuit board.

8. An apparatus using a liquid crystal display device according to claim 7, wherein

said shielding case has a guide for positioning said connection circuit board and said elastic connector.

9. An apparatus using a liquid crystal display device according to claim 7, wherein said connection circuit board further comprises a flexible board.

10. A liquid crystal display device comprising:

a pair of substrates facing each other via a liquid crystal;

a semiconductor device directly connected at least to one substrate; and

a plurality of semiconductor input terminals formed on the substrate so that signals may be applied to the semiconductor input terminals, said semiconductor input terminals being connected to semiconductor driving output terminals formed on an apparatus using the liquid crystal display device;

wherein said semiconductor input terminals and said semiconductor driving output terminals are connected to each other via an elastic connector having a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately, said elastic connector having a semi-circular cross-sectional shape.

11. An apparatus using a liquid crystal display device, said apparatus including a plurality of semiconductor driving output terminals to which said liquid crystal display device is connected, said liquid crystal display device comprising:

a pair of substrates facing each other via a liquid crystal;

a semiconductor device directly connected at least to one substrate;

a plurality of semiconductor input terminals formed on the substrate so that signals may be applied to the semiconductor input terminals;

a light source for emitting light;

a light guide for guiding the light emitted from said light source; and

a hole formed in said light guide for receiving an elastic connector;

wherein said semiconductor input terminals and said semiconductor driving output terminals are connected to each other via said elastic connector having a plurality of conductor elements and a plurality of electrically-insulating elements which are disposed alternately, said elastic connector having a semi-circular cross-sectional shape.