PRESSURE SENSITIVE TOUCH PANEL AND PORTABLE TERMINAL INCLUDING THE SAME

• US 20130278498A1
• Filed: 04/18/2013
• Published: 10/24/2013
• Est. Priority Date: 04/18/2012
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Kyung-Wan, SEO, Ho-Seong, CHO, Shi-Yun, CHOI, Youn-Ho, JUNG, Dae-Kwang
• Application Number:
  US13/865,623
• Publication Number:
  US 20130278498A1
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04144 using an array of force sensing means position sensing using the local deformation of sensor cells G06F3/0447

Abstract

A pressure sensitive touch panel is provided, which includes first sensor lines arranged along a first axis; second sensor lines arranged along a second axis that cross the first axis; a drive unit that sequentially applies a scan signal to the first sensor lines, and sequentially detects detection signals of the second sensor lines; and a controller that controls the drive unit to selectively apply the scan signal to one of the first sensor lines and to selectively detect a detection signal from one of the second sensor lines.

Claims

1. A pressure sensitive touch panel comprising:

first sensor lines arranged along a first axis;

second sensor lines arranged along a second axis that cross the first axis;

a drive unit that sequentially applies a scan signal to the first sensor lines, and sequentially detects detection signals of the second sensor lines; and

a controller that controls the drive unit to selectively apply the scan signal to one of the first sensor lines and to selectively detect a detection signal from one of the second sensor lines.

2. The pressure sensitive touch panel of claim 1, wherein the drive unit comprises:

a first switch that applies the scan signal to the one of the first sensor lines and connects remaining ones of the first sensor lines to a ground voltage; and

a second switch that selectively detects a detection signal from the one of the second sensor lines and connects remaining ones of the second sensor lines to the ground voltage.

3. The pressure sensitive touch panel of claim 1, wherein the first axis and the second axis are perpendicular to each other.

4. The pressure sensitive touch panel of claim 1, wherein each of the first and second sensor lines comprises a conductive electrode line and a resistance layer laminated on the electrode line.

5. The pressure sensitive touch panel of claim 1, wherein the controller determines a touch point, based on a difference between a voltage of the scan signal and a voltage of the detection signal.

6. A portable terminal including a pressure sensitive touch panel comprising:

first sensor lines arranged along a first axis;

second sensor lines arranged along a second axis that cross the first axis;

a drive unit that sequentially applies a scan signal to the first sensor lines, and sequentially detects detection signals of the second sensor lines; and

a controller that controls the drive unit to selectively apply the scan signal to one of the first sensor lines and to selectively detect a detection signal from one of the second sensor lines.

7. The portable terminal of claim 6, further comprising a display unit that displays an image.

8. The portable terminal of claim 7, wherein the touch panel and the display unit are flexible.

9. The portable terminal of claim 6, wherein the drive unit comprises:

a first switch that applies the scan signal to the one of the first sensor lines and connects remaining ones of the first sensor lines to a ground voltage; and

a second switch that selectively detects a detection signal from the one of the second sensor lines and connects remaining ones of the second sensor lines to the ground voltage.

10. The portable terminal of claim 6, wherein the first axis and the second axis are perpendicular to each other.

11. The portable terminal of claim 6, wherein each of the first and second sensor lines comprises a conductive electrode line and a resistance layer laminated on the electrode line.

12. The portable terminal of claim 6, wherein the controller determines a touch point, based on a difference between a voltage of the scan signal and a voltage of the detection signal.