Electronic device having protection panel

• US 8,243,225 B2
• Filed: 12/22/2008
• Issued: 08/14/2012
• Est. Priority Date: 12/27/2007
• Status: Expired due to Fees

• Current Assignee: Nissha Printing Company Limited
• Original Assignee: Nissha Printing Company Limited
• Inventors: Kai, Yoshihiro, Nishikawa, Kazuhiro, Takai, Yuichiro
• Primary Examiner(s): PEACE, RHONDA S
• Application Number:
  US12/810,177
• Publication Number:
  US 20110026202A1
• Time in Patent Office: 1,331 Days
• Field of Search: None
• US Class Current: 349/58
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H01C 10/106 on resistive material dispersed in an elastic material H01C10/103 and H01C10/12 take precedence; for electric switches H01H1/029
• CPC Class Codes: H01H 2207/038 Conductive paste
• CPC Class Codes: H01H 2229/004 Conductive ink

Abstract

An electronic device having a protection panel includes: a display device (3) having a display part (3A); a housing (2) for mounting the display device (3) therein which has a display window (2A) including an opening for allowing the display part (3A) to face externally and a supporting portion (2b) in a shape of a frame; a protection panel (4) fitted into the display window (2A), whose back side rim portion is supported by the supporting portion (2b); and a pressure-sensitive conductive print layer (30) which is disposed between the protection panel (4) and the supporting portion (2b) and configured to detect a pressing operation on the protection panel (4), and includes a resin having a glass-transition temperature (Tg) in a temperature range higher than room temperature as binder, and a conductive material dispersed therein.

Claims

1. An electronic device having a protection panel comprising:

a display device having a display part;

a housing which is configured to mount the display device therein and have a display window comprising;

an opening to allow the display part to face externally, and

a supporting portion in a shape of a frame;

a protection panel fitted into the display window, whose back side rim portion is supported by the supporting portion; and

a pressure-sensitive conductive print layer which is disposed between the protection panel and the supporting portion and configured to detect a pressing operation on the protection panel, and comprises;

a resin having a glass-transition temperature (Tg) in a temperature range higher than room temperature as binder; and

a conductive material dispersed therein.

2. The electronic device having a protection panel according to claim 1 wherein the pressure-sensitive conductive print layer is a thin film comprising:

a vinyl chloride-vinyl acetate copolymer resin or acrylic resin as a binder; and

the conductive material dispersed therein.

3. The electronic device having a protection panel according to claim 1 wherein a transparent resin film having the pressure-sensitive conductive print layer formed thereon is attached to a back side of the protection panel.

4. The electronic device having a protection panel according to claim 1 wherein the pressure-sensitive conductive print layer is formed in a shape of a loop along the supporting portion.

5. The electronic device having a protection panel according to claim 1 wherein the pressure-sensitive conductive print layer is formed in at least one portion of the supporting portion.

6. The electronic device having a protection panel according to claim 1 wherein a pair of comb-like electrodes are disposed on one face of the pressure-sensitive conductive print layer, said pair of comb-like electrodes being configured to detect a pressing operation on the protection panel.

7. The electronic device having a protection panel according to claim 1 wherein a pair of spiral electrodes are disposed on one face of the pressure-sensitive conductive print layer, said pair of spiral electrodes being configured to detect a pressing operation on the protection panel.

8. The electronic device having a protection panel according to claim 1 wherein the protection panel is configured to function as a touch panel.