Electric connecting structure of display equipment

• US 5,675,397 A
• Filed: 06/09/1995
• Issued: 10/07/1997
• Est. Priority Date: 06/09/1994
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Fukushima, Kenji
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Ngo, Julie
• Application Number:
  US08/488,812
• Time in Patent Office: 851 Days
• Field of Search: 359/48, 359/50, 359/83, 359/88, 313/512, 350/334, 349/149, 349/151, 349/152, 349/58, 349/74
• US Class Current: 349/149
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• 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: 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

Display equipment with exposed electrodes formed for establishing an electric connection with each of liquid crystal display, an electroluminescent light and a printed board. Anisotropic, electrically conductive elastomer pieces are placed between the respective exposed electrodes of the printed board, the liquid crystal display section and the electroluminescent light. A pressing rubber piece is placed on the side of the electroluminescent light which is opposite to its electrode side, and the component parts are received in and held by a holding frame which houses them from above the liquid crystal display section. Bent tip portions are inserted into the printed board and bent to fix the printed board and the holding frame. The electrode section of the electroluminescent light is pressed by the window head jump of the holding frame via the pressing rubber piece and is connected electrically in a stable manner. Even in cases where the liquid crystal display equipment has an electric connection section with a multilayer structure, the productivity may be increased since no solder is used. Arrangement of an anisotropic, electrically conductive member across the cut created by the removal allows establishment of an electric connection between non-adjacent electric circuit boards. If necessary, a plurality of such anisotropic, electrically conductive members may be arranged by mounting them on an insulating board which is then inserted between the electric circuit boards to be electrically connected.

Claims

1. Display equipment comprising:

display means which receives an electric signal and displays display contents on a display section, said display contents depending on said electric signal;

illumination means having a first electrode for receiving electric power, said illumination means illuminating said display section;

a circuit board having a second electrode, said circuit board forming a multilayer structure together with said display means and said illumination means, wherein said circuit board sends said electric signal to said display means, and provides said electric power to said illumination means;

a first electrically conductive elastomer member which is separable from said display means and said illumination means, wherein said first electrically conductive elastomer member electrically connects said display means and said illumination means without soldering;

a second electrically conductive elastomer member which is separable from said first and second electrodes and electrically connects said first and second electrodes; and

an open structure type holding frame which houses said display means, said illumination means and said circuit board from above a top surface of the display equipment.

2. Display equipment as claimed in claim 1, wherein said first electrically conductive member and said second electrically conductive material are anisotropic, electrically conductive materials.

3. Display equipment as claimed in claim 2, wherein said display means is liquid crystal display equipment.

4. Display equipment as claimed in claim 3, wherein said illumination means is an electroluminescent light.

5. Display equipment as claimed in claim 1, wherein said circuit board has a hole, and said holding frame has a protruding portion which fits in said hole.

6. Display equipment comprising:

a first board having a first electrode which is capable of establishing at least one electric connection;

a second board placed on said first board in an overlaid state; and

a third board placed on said second board in an overlaid state, said third board having a second electrode which is capable of establishing at least one electric connection,

wherein said second board has a cut created by removal of at least one portion thereof which faces said first and second electrodes, and

wherein said display equipment further comprises an electrically conductive elastomer material arranged through said cut to establish an electric connection between said first and second electrodes without soldering.

7. Display equipment as claimed in claim 6, wherein said electrically conductive material is an anisotropic, electrically conductive material.

8. Display device as claimed in claim 6, which further comprises:

display means for displaying display contents on the display section which depend on said electric signal; and

illumination means for illuminating said display section.

9. Display equipment as claimed in claim 6, wherein said electrically conductive material is arranged through a connecting board which is overlaid on said second board.

10. Display equipment as claimed in claim 6, wherein said cut is a hole.

11. Display equipment as claimed in claim 7, wherein said cut is a notch formed on the perimeter of said second board.