Touch panel having press detection function

• US 9,417,725 B1
• Filed: 05/22/2014
• Issued: 08/16/2016
• Est. Priority Date: 06/23/2013
• Status: Active Grant

• Current Assignee: Nissha Printing Company Limited
• Original Assignee: Nissha Printing Company Limited
• Inventors: Kakutani, Eiji, Ozaki, Keisuke, Shibata, Junichi, Murata, Juichi, Watazu, Yuji, Suetomi, Yoshiko, Okumura, Shuzo, Omote, Ryomei, Hashimoto, Takao
• Primary Examiner(s): Bolotin, Dmitriy
• Application Number:
  US14/900,961
• Publication Number:
  US 20160231849A1
• Time in Patent Office: 817 Days
• Field of Search: 345/173, 345/174, 178 1801- 1807
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A piezoelectric sensor that can perform position detection and load detection. The touch panel having press detection function can detect the pressing load inputted to the pressing surface. An upper electrode, an upper insert member, an intermediate electrode, a lower insert member, and a lower electrode are arranged away from the pressing surface in this order. Among the upper electrode, the intermediate electrode, and the lower electrode, capacitance detection electrodes Cx, Cy for detecting the pressing position, and detection electrodes S for measuring the electric charge according to the pressure when the operation is inputted to the touch panel 1 having press detection function are included. One of the upper insert member and the lower insert member is composed of an insulating body, and the other is composed of a piezoelectric body.

Claims

1. A touch panel having press detection function for detecting a pressing load inputted to a pressing surface, the touch panel comprising:

an upper electrode, an upper insert member, an intermediate electrode, a lower insert member, and a lower electrode, arranged away from the pressing surface in this order;

the upper insert member is composed of an insulating body;

the lower insert member is composed of a piezoelectric body;

the upper electrode includes first capacitance detection electrodes configured to detect pressing position when input is applied to the touch panel;

the lower electrode includes second capacitance detection electrodes;

the intermediate electrode includes detection electrodes for measuring the electric charge configured to detect electric charge according to the pressing; and

a both-side electrode member and a one-side electrode member are adhered to each other with adhesive, the both-side electrode member having the upper insert member, the upper electrode laminated on an upper surface of the upper insert member, and the intermediate electrode laminated on a lower surface of the upper insert member, and the one-side electrode member having the lower insert member, and the lower electrode laminated on a lower surface of the lower insert member.

2. An electronic device comprising a touch panel having press detection function according to claim 1, and a display member provided under the touch panel, wherein

the touch panel having press detection function is transparent.

3. A touch panel having press detection function for detecting a pressing load inputted to a pressing surface, the touch panel comprising:

an upper electrode, an upper insert member, an intermediate electrode, a lower insert member, and a lower electrode, arranged away from the pressing surface in this order;

the upper insert member is composed of an insulating body;

the lower insert member is composed of a piezoelectric body;

the upper electrode includes first capacitance detection electrodes configured to detect pressing position when input is applied to the touch panel;

the intermediate electrode includes second capacitance detection electrodes that functions as a reference potential electrode;

the lower electrode includes detection electrodes for measuring the electric charge configured to detect electric charge according to the pressing; and

a both-side electrode member and a one-side electrode member are adhered to each other with adhesive, the both-side electrode member having the upper insert member, the upper electrode laminated on an upper surface of the upper insert member, and the intermediate electrode laminated on a lower surface of the upper insert member, and the one-side electrode member having the lower insert member and the lower electrode laminated on a lower surface of the lower insert member.

4. An electronic device comprising a touch panel having press detection function according to claim 3, and a display member provided under the touch panel, wherein

the touch panel having press detection function is transparent.

5. A touch panel having press detection function for detecting a pressing load inputted to a pressing surface, the touch panel comprising:

an upper electrode, an upper insert member, an intermediate electrode, a lower insert member, and a lower electrode, arranged away from the pressing surface in this order;

the upper insert member is composed of a piezoelectric body;

the lower insert member is composed of an insulating body;

the upper electrode includes first capacitance detection electrodes configured to detect pressing position when input is applied to the touch panel;

the lower electrode includes second capacitance detection electrodes;

the intermediate electrode includes detection electrodes for measuring the electric charge configured to detect electric charge according to the pressing; and

a one-side electrode member and a both-side electrode member are adhered to each other with adhesive, the one-side electrode member having the upper insert member and the upper electrode laminated on an upper surface of the upper insert member, and the both-side electrode member having the lower insert member, the intermediate electrode laminated on an upper surface of the lower insert member, and the lower electrode laminated on a lower surface of the lower insert member.

6. An electronic device comprising a touch panel having press detection function according to claim 5, and a display member provided under the touch panel, wherein

the touch panel having press detection function is transparent.