Circuit board connecting structure, electro-optical device, electronic apparatus provided with the same, and manufacturing method for electro-optical device

• US 6,191,838 B1
• Filed: 08/17/1999
• Issued: 02/20/2001
• Est. Priority Date: 08/18/1998
• Status: Expired due to Term

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Muramatsu, Eiji
• Primary Examiner(s): Parker, Kenneth
• Assistant Examiner(s): QI, ZHI QIANG
• Application Number:
  US09/375,993
• Time in Patent Office: 553 Days
• Field of Search: 349/149, 349/150, 349/151, 349/152, 349/58, 349/60, 349/62, 361/681, 361/682
• US Class Current: 349/149
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 2201/465 Snap -fit
• CPC Class Codes: H01R 12/7076 for connection between PCB and component, e.g. display
• CPC Class Codes: H01R 13/2414 conductive elastomers
• CPC Class Codes: H05K 3/365 by abutting, i.e. without alloying process
• CPC Class Codes: Y10T 29/49126 Assembling bases
• CPC Class Codes: Y10T 29/4913 Assembling to base an electrical component, e.g., capacitor, etc.
• CPC Class Codes: Y10T 29/49137 Different components
• CPC Class Codes: Y10T 29/49169 Assembling electrical component directly to terminal or elongated conductor

Abstract

The present invention provides a circuit board connecting structure capable of connecting a circuit board, such as a flexible wiring board, and another circuit board by securing adequate contact pressure without the need for forming any special part thereby improving the reliability of contact and reducing the number of parts; an electro-optical device; electronic apparatus provided with the same; and a manufacturing method for an electro-optical device. The circuit board connecting structure electrically connects a conductive terminal 22-1 provided on a flexible wiring substrate 20, which is a first circuit board, and a conductive terminal 12 provided on a second circuit board 10. The connecting structure has a conductive member 30 provided between the first circuit board 20 and the second circuit board 10 to electrically connect the foregoing respective conductive terminals 22-1 and 12, a structural member 40 which is fixed to the first circuit board 20 and disposed to face one surface of the first circuit board 20, and a spacing member 60 provided between the structural member 40 and the first circuit board 20. The structural member 40 has a light guide 44 on which a liquid crystal display panel 50 is rested.

Claims

1. A circuit board connecting structure for electrically connecting a conductor terminal provided on a first circuit board and a conductive terminal provided on a second circuit board, comprising;

a conductive member disposed between said first circuit board and said second circuit board, and electrically connecting said respective conductive terminals;

a structural member disposed on an opposite side of said first circuit board from said second circuit board; and

a discrete spacing member disposed between said structural member and said first circuit board,

wherein said discrete spacing member and said structural member provide a predetermined contact pressure between said respective conductive terminals and said conductive member.

2. A circuit board connecting structure according to claim 1, wherein said spacing member is provided at least at a part of an area wherein said conductive member is disposed, and a part of said first circuit board is held between said spacing member and said conductive member.

3. A circuit board connecting structure according to claim 1, wherein said spacing member is formed to be larger than said conductive member in a direction of a surface of said first circuit board.

4. A circuit board connecting structure according to claim 1, wherein said spacing member is formed of an elastic member.

5. A circuit board connecting structure according to claim 1, wherein said conductive member is formed of an elastic member.

6. A circuit board connecting structure according to claim 1, wherein said conductive member has a plurality of rows of conductive portions arranged in a direction in which said conductive terminals are arranged, and an insulating portion disposed between said conductive portions.

7. A circuit board connecting structure according to claim 1, wherein said structural member has at least a support section that continues in a direction of a surface of said first circuit board, said supporting section supporting an electro-optical display section.

8. A circuit board connecting structure according to claim 1, wherein said structural member has a fixing section connected to said circuit board.

9. A circuit board connecting structure according to claim 1, wherein said first circuit board is a flexible wiring board.

10. An electro-optical device comprising the circuit board connecting structure described in claim 1.

11. An electro-optical device for electrically connecting a conductive terminal, which is provided on a flexible wiring board electrically connected to an electro-optical display section, and a conductive terminal provided on a circuit board so as to perform display of said electro-optical display section, said electro-optical device comprising:

a conductive member disposed between said flexible wiring board and said circuit board to electrically connect said respective conductive terminals;

a structural member disposed on an opposite side of said flexible wiring board as said circuit board; and

a discrete spacing member disposed between said structural member and said flexible wiring board,

wherein said discrete spacing member and said structural member provide a predetermined contact pressure between said respective conductive terminals and said conductive member.

12. An electro-optical device according to claim 11, wherein said structural member has a support section on which said electro-optical display section is rested, and a fixing section connected to said circuit board.

13. An electro-optical device according to claim 12, wherein said electro-optical display section is a liquid crystal display panel, and said support section is a light guide.

14. An electro-optical device according to claim 12, wherein said structural member has a fixing section for fixing said electro-optical display section rested on said support section.

15. An electro-optical device according to claim 11, wherein said spacing member is provided such that it is associated with at least a part of an area wherein said conductive member is disposed, and a part of said flexible wiring board is held between said spacing member and said conductive member.

16. An electro-optical device according to claim 11, wherein said spacing member is formed to be larger than said conductive member in a direction of a surface of said flexible wiring board.

17. An electro-optical device according to claim 11, wherein said spacing member is formed of an elastic member.

18. An electro-optical device according to claim 11, wherein said conductive member is formed of an elastic member.

19. An electro-optical device according to claim 11, wherein said conductive member has a plurality of rows of conductive portions arranged in a direction in which said conductive terminals are arranged, and an insulating portion disposed between said conductive portions.

20. Electronic apparatus comprising the electro-optical device described in claim 11.

21. An electro-optical device for electrically connecting a conductive terminal, which is provided on a flexible wiring board electrically connected to a liquid crystal display panel, and a conductive terminal provided on a circuit board so as to perform display of said liquid crystal display panel, said electro-optical device comprising:

a conductive member disposed between said flexible wiring board and said circuit board to electrically connect said respective conductive terminals;

a light guiding member disposed on an opposite side of said flexible wiring board as said circuit board; and

a discrete spacing member disposed between said light guiding member and said flexible wiring board,

wherein said discrete spacing member and said light guiding member provide a predetermined contact pressure between said respective conductive terminals and said conductive member.

22. An electro-optical device according to claim 21, wherein said light guiding member has a support section on which said liquid crystal display panel is rested, and a fixing section connected to said circuit board, said support section serving also as a light guide.

23. An electro-optical device according to claim 21, wherein said light guiding member has a fixing section for fixing said liquid crystal display panel.

24. An electro-optical device according to claim 21, wherein said spacing member is provided such that it is associated with at least a part of an area wherein said conductive member is disposed, and a part of said flexible wiring board is held between said spacing member and said conductive member.

25. An electro-optical device according to claim 21, wherein said spacing member is formed to be larger than said conductive member in a direction of a surface of said flexible wiring board.

26. An electro-optical device according to claim 21, wherein said spacing member is formed of an elastic member.

27. An electro-optical device according to claim 21, wherein said conductive member is formed of an elastic member.

28. An electro-optical device according to claim 21, wherein said conductive member has a plurality of rows of conductive portions arranged in a direction in which said conductive terminals are arranged, and an insulating portion disposed between said conductive portions.

29. Electronic apparatus comprising the electro-optical device described in claim 21.

30. A circuit board connecting structure for electrically connecting a conductor terminal provided on a first circuit board and a conductive terminal provided on a second circuit board, comprising:

an electro-optic display section electrically connected to said first circuit board;

a conductive member disposed between said first circuit board and said second circuit board, and electrically connecting said respective conductive terminals;

a structural member disposed on an opposite side of said first circuit board from said second circuit board; and

a discrete spacing member disposed between said structural member and said first circuit board,

wherein said discrete spacing member and said structural member provide a predetermined contact pressure between said respective conductive terminals and said conductive member.

31. An electro-optical device for electrically connecting a conductive terminal, which is provided on a flexible wiring board, and a conductive terminal provided on a circuit board comprising:

an electro-optical display section electrically connected to said flexible wiring board;

a conductive member disposed between said flexible wiring board and said circuit board to electrically connect said respective conductive terminals;

a structural member disposed on an opposite side of said flexible wiring board as said circuit board; and

a discrete spacing member disposed between said structural member and said flexible wiring board,

wherein said discrete spacing member and said structural member provide a predetermined contact pressure between said respective conductive terminals and said conductive member.

32. An electro-optical device for electrically connecting a conductive terminal, which is provided on a flexible wiring board, and a conductive terminal provided on a circuit board, comprising:

a liquid crystal display panel electrically connected to said flexible wiring board;

a conductive member disposed between said flexible wiring board and said circuit board to electrically connect said respective conductive terminals;

a light guiding member disposed on an opposite side of said flexible wiring board as said circuit board; and

a discrete spacing member disposed between said light guiding member and said flexible wiring board,

wherein said discrete spacing member and said light guiding member provide a predetermined contact pressure between said respective conductive terminals and said conductive member.

33. A circuit board connecting structure comprising;

a first conductor terminal provided on a flexible wiring board;

a second conductor terminal provided on a circuit board, said circuit board having at least one hole formed thereon;

a conductive member disposed between said flexible wiring board and said circuit board to electrically connect said respective conductive terminals;

a panel support member disposed on an opposite side of said flexible wiring board as said circuit board and supporting an electro-optical display section, said panel support member having at least one latching section; and

spacing member disposed between said panel support member and said flexible wiring board,

wherein at least one of said latching sections engages at least one of said holes such that said panel support member and said circuit board fix the flexible wiring board between said spacing member and said conductive member.