Flat panel display device

• US 8,723,813 B2
• Filed: 06/30/2009
• Issued: 05/13/2014
• Est. Priority Date: 07/23/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Sung-Un, Kim, Tae-Jin, Jeong, Joo-Hyeon, Ahn, Soon-Sung, Choi, In-Ho
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): LAM, VINH TANG
• Application Number:
  US12/494,502
• Publication Number:
  US 20100020041A1
• Time in Patent Office: 1,778 Days
• Field of Search: 345173-184, 178/18.05, 178 1801- 2001
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

A flat panel display device that can easily determine whether it has been touched or not by sensing a variation in capacitance by using a cushion member. The flat panel display device includes a first face; a frame having a conductive face and supporting the first face and having a conductive face; a cushion member interposed between the first face and the conductive face and formed of a dielectric material, wherein a thickness of the cushion member varies depending on an externally applied pressure, a conductive film interposed between the first face and the cushion member; and a sensor unit electrically connected to the conductive face and the conductive film respectively, which calculates and senses a variation in capacitance of a capacitor comprising the conductive face, the cushion member, and the conductive film.

Claims

1. A flat panel display device comprising:

a first face;

a frame comprising a conductive face and a portion that is substantially perpendicular to the conductive face, the frame supporting the first face;

a cushion member interposed between the first face and the conductive face and formed of a dielectric material, wherein a thickness of the cushion member varies depending on an externally applied pressure;

a conductive film interposed between the first face and the cushion member; and

a sensor unit electrically connected to the conductive face and the conductive film respectively, which calculates and senses a variation in capacitance of a capacitor comprising the conductive face, the cushion member, and the conductive film,

wherein the cushion member is configured to contact the conductive face and the conductive film when the thickness of the cushion member is at a maximum, and

wherein the cushion member is spaced from the portion of the frame that is substantially perpendicular to the conductive face.

2. The flat panel display device of claim 1, wherein the conductive face is formed of a metal, and the conductive face and the frame are integrally formed.

3. The flat panel display device of claim 1, wherein the frame is formed of an insulator.

4. The flat panel display device of claim 1, wherein the conductive film is patterned.

5. The flat panel display device of claim 4, wherein the cushion member is patterned.

6. The flat panel display device of claim 5, wherein the same pattern is used to pattern the cushion member and the conductive film.

7. The flat panel display device of claim 1, wherein the flat panel display device displays an image through a second face disposed opposite to the first face.

8. The flat panel display device of claim 1, wherein the cushion member further comprises an adhesive layer.

9. A flat panel display device comprising:

a pair of conductive faces which are opposite to each other;

a cushion member interposed between the conductive faces and formed of a dielectric material, wherein a thickness of the cushion member varies depending on an externally applied pressure, and wherein the cushion member is configured to contact both of the conductive faces when the thickness of the cushion member is at a maximum;

a display device located on an outer side of one conductive face of the conductive faces;

a sensor unit electrically connected to each of the conductive faces, which calculates and senses a variation in capacitance of a capacitor comprising the conductive faces and the cushion member; and

a frame comprising a first portion for supporting the pair of conductive faces, the cushion member, and the display device, and a second portion that is substantially perpendicular to the first portion,

wherein the cushion member is spaced from the second portion of the frame.

10. The flat panel display device of claim 9, wherein one of the conductive faces is patterned.

11. The flat panel display device of claim 10, wherein the cushion member is patterned.

12. The flat panel display device of claim 11, wherein the same pattern is used to pattern the cushion member and the conductive face.

13. The flat panel display device of claim 9, wherein the cushion member further comprises an adhesive layer.