Display Device

• US 20080055834A1
• Filed: 08/30/2007
• Published: 03/06/2008
• Est. Priority Date: 09/01/2006
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Tsubokura, Masaki, Matsuzaki, Yukio
• Granted Patent: US 7,522,249 B2
• Time in Patent Office: Days
• US Class Current: 361/681
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133311 Environmental protection, e.g. against dust or humidity
• CPC Class Codes: H05K 1/0256 Electrical insulation details, e.g. around high voltage areas
• CPC Class Codes: H05K 1/147 at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit H05K1/148 takes precedence
• CPC Class Codes: H05K 2203/0191 Using tape or non-metallic foil in a process, e.g. during filling of a hole with conductive paste
• CPC Class Codes: H05K 5/0017 with operator interface units
• CPC Class Codes: H05K 5/0217 Mechanical details of casings covers, lids, hoods or members for covering apertures H05K5/03
• CPC Class Codes: H05K 9/0054 specially adapted for display applications

Abstract

The present invention prevents the intrusion of a foreign material into a connector of printed circuit boards in a display device which arranges the printed circuit boards on a lower side of a display region. A display device including: a first printed circuit board; a second printed circuit board; a flexible printed wiring board which connects the first printed circuit board and the second printed circuit board; and a frame member on which the first printed circuit board and the second printed circuit board are mounted, wherein the first printed circuit board includes a connector which mechanically connects a line formed on the first printed circuit board and a line formed on the flexible printed wiring board. The display device further includes a foreign material intrusion preventing member which has a region overlapping the connector of the first printed circuit board as viewed in a plan view on a surface side of the first printed circuit board which faces the frame member in an opposed manner and projects from an end portion of the first printed circuit board toward a second printed circuit board side along the flexible printed wiring board.

Claims

1. A display device comprising:

a first printed circuit board;

a second printed circuit board;

a flexible printed wiring board which connects the first printed circuit board and the second printed circuit board; and

a frame member on which the first printed circuit board and the second printed circuit board are mounted,

the first printed circuit board including a connector which mechanically connects a line formed on the first printed circuit board and a line formed on the flexible printed wiring board, wherein

the display device includes a foreign material intrusion preventing member which has a region overlapping the connector of the first printed circuit board as viewed in a plan view on a surface side of the first printed circuit board which faces the frame member in an opposed manner and projects from an end portion of the first printed circuit board toward a second printed circuit board side along the flexible printed wiring board.

2. A display device according to claim 1, wherein a surface of the first printed circuit board which faces the frame member in an opposed manner and a surface of the second printed circuit board which faces the frame member in an opposed manner are arranged substantially orthogonal to each other.

3. A display device according to claim 1, wherein the region of the foreign material intrusion preventing member which overlaps the connector of the first printed circuit board as viewed in a plan view is sandwiched between the first printed circuit board and the frame member.

4. A display device according to claim 1, wherein the portion of the foreign material intrusion preventing member which projects from the end portion of the first printed circuit board toward the second printed circuit board has an end portion thereof arranged closer to the second printed circuit board brought into contact with the flexible printed wiring board.

5. A display device according to claim 1, wherein the region of the foreign material intrusion preventing member which overlaps the connector of the first printed circuit board as viewed in a plan view is adhered to the frame member by a tacky adhesive material or an adhesive material.

6. A display device according to claim 1, wherein the region of the foreign material intrusion preventing member which overlaps the connector of the first printed circuit board as viewed in a plan view is adhered to the first printed circuit board by a tacky adhesive material or an adhesive material.

7. A display device according to claim 1, wherein the portion of the foreign material intrusion preventing member which projects from the end portion of the first printed circuit board toward the second printed circuit board has an end portion thereof arranged closer to the second printed circuit board adhered to the flexible printed wiring board.

8. A display device according to claim 1, wherein the foreign material intrusion preventing member is a film-like member which is made of an insulation material.