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

• US 20010000763A1
• Filed: 12/05/2000
• Published: 05/03/2001
• Est. Priority Date: 08/18/1998
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Muramatsu, Eiji
• Granted Patent: US 6,675,470 B2
• Time in Patent Office: Days
• US Class Current: 439/74
• 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 conductive 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 spacing member disposed between said structural member and said first circuit board.

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 spacing member disposed between said structural member and said flexible wiring board.

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.

33. 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.

34. 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.

35. An electro-optical device according to

claim 11

, wherein said spacing member is formed of an elastic member.

36. An electro-optical device according to

claim 11

, wherein said conductive member is formed of an elastic member.

37. 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.

38. Electronic apparatus comprising the electro-optical device described in

claim 11

.

15. An electro-optical device for electrically connecting a conductive terminal, which is provided on a flexible wiring board electrically connected to an 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 spacing member disposed between said light guiding member and said flexible wiring board.

16. An electro-optical device according to

claim 15

, 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.

17. An electro-optical device according to

claim 15

, wherein said light guiding member has a fixing section for fixing said liquid crystal display panel.

18. An electro-optical device according to

claim 15

, 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.

19. An electro-optical device according to

claim 15

, wherein said spacing member is formed to be larger than said conductive member in a direction of a surface of said flexible wiring board.

20. An electro-optical device according to

claim 15

, wherein said spacing member is formed of an elastic member.

21. An electro-optical device according to

claim 15

, wherein said conductive member is formed of an elastic member.

22. An electro-optical device according to

claim 15

, 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.

23. Electronic apparatus comprising the electro-optical device described in

claim 15

.

24. A manufacturing method for an electro-optical device wherein a conductive terminal provided on a flexible wiring board electrically connected to an electro-optical display section is electrically connected to a conductive terminal provided on a circuit board, comprising the steps of:

disposing a structural member at a rear side of said electro-optical display section, and bending said flexible wiring board toward a rear side of said structural member to oppose said flexible wiring board to said circuit board;

disposing a conductive member in a predetermined area between said conductive terminal of said bent flexible wiring board and said conductive terminal of said circuit board;

disposing a spacing member in a predetermined area between said bent flexible wiring board and said structural member such that said spacing member is positioned such that it is associated with at least a part of an area wherein said conductive member is disposed; and

defining an interval between said structural member and said circuit board thereby to compression-bond said conductive member to said respective conductive terminals via said spacing member so as to electrically connect said flexible wiring board and said circuit board.

25. A manufacturing method for an electro-optical device according to

claim 24

;

wherein, in the step of electrically connecting said flexible wiring board and said circuit board, said structural member has a fixing section connected to said circuit board, and said fixing section is connected to said circuit board to define an interval between said structural member and said circuit board.

26. A manufacturing method for an electro-optical device according to

claim 24

;

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.

27. A manufacturing method for an electro-optical device according to

claim 24

;

wherein said spacing member is formed to be larger than said conductive member in the direction of a surface of said flexible wiring board.

28. A manufacturing method for an electro-optical device according to

claim 24

;

wherein said spacing member is formed of an elastic member.

29. A manufacturing method for an electro-optical device according to

claim 24

;

wherein said conductive member is formed of an elastic member.

30. A manufacturing method for an electro-optical device according to

claim 24

;

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.

31. A manufacturing method for an electro-optical device according to

claim 24

;

wherein said electro-optical display section is a liquid crystal display panel.

32. A manufacturing method for an electro-optical device according to

claim 31

;

wherein said liquid crystal display panel is rested on a support section serving also as a light guide.