TOUCH SCREEN DEVICE

• US 20110273396A1
• Filed: 07/26/2010
• Published: 11/10/2011
• Est. Priority Date: 05/06/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: CHUNG, Il Kwon
• Application Number:
  US12/843,769
• Publication Number:
  US 20110273396A1
• Time in Patent Office: Days
• US Class Current: 345/174
• 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04142 the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

Disclosed herein is a touch screen device, including: a touch panel; a display panel that is installed under the touch panel; and a plurality of pressure-sensitive sensors that are formed to be spaced from each other on the outer sides between the touch panel and the display panel and include an insulating substrate, electrodes that include anode electrodes and cathode electrodes formed to be spaced from each other on the insulating substrate, and piezo resistors that are formed on the insulating substrate on which the electrodes are formed and have resistance values varied depending on the pressure to be applied. The touch screen device can measure the strength of the contact input as well as the 2D coordinates using the piezo resistors of the pressure-sensitive sensor.

Claims

1. A touch screen device, comprising:

a touch panel;

a display panel that is installed under the touch panel; and

a plurality of pressure-sensitive sensors that are formed to be spaced from each other on the outer sides between the touch panel and the display panel and include an insulating substrate, electrodes that include anode electrodes and cathode electrodes formed to be spaced from each other on the insulating substrate, and piezo resistors that are formed on the insulating substrate on which the electrodes are formed and have resistance values varied depending on the pressure to be applied.

2. The touch screen device as set forth in claim 1, wherein the pressure-sensitive sensor further includes an insulating layer formed on the piezo resistor.

3. The touch screen device as set forth in claim 1, wherein the piezo resistor has a resistance value decreased when pressure is applied.

4. The touch screen device as set forth in claim 1, wherein the resistance value of the piezo resistor is decreased when the pressure is applied to the pressure-sensitive sensor so that the anode electrode is conducted with the cathode electrode through the piezo resistor.

5. The touch screen device as set forth in claim 1, wherein the pressure-sensitive sensor is formed at four sides, four apexes, or them of the outer sides between the touch panel and the display panel.

6. The touch screen device as set forth in claim 1, wherein the piezo resistor includes a quantum tunneling composite (QTC).

7. The touch screen device as set forth in claim 1, wherein the touch panel is a resistive type or a capacitive type.