TOUCH SCREEN PANEL AND DRIVING METHOD THEREOF

• US 20140022188A1
• Filed: 12/13/2012
• Published: 01/23/2014
• Est. Priority Date: 07/17/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: AHN, SOON-SUNG
• Granted Patent: US 9,046,944 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• 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 3/047 using sets of wires, e.g. crossed wires

Abstract

A touch screen panel includes a plurality of driving electrodes, a plurality of sensing electrodes crossing the driving electrodes, a driver for supplying a driving signal to the driving electrodes in a touch recognizing mode, and a controller for receiving signals from the sensing electrodes. In a noise measuring mode, the controller is configured to cut off an electrical connection between one of the driving electrodes and the driver or between one of the sensing electrodes and the controller, maintain an electrical connection between another one of the sensing electrodes and the controller, and detect a noise signal from the other one of the sensing electrodes. The touch screen panel and a driving method of the touch screen panel can increase or maximize the reception sensitivity of outside noise.

Claims

1. A touch screen panel comprising:

a plurality of driving electrodes;

a plurality of sensing electrodes crossing the driving electrodes;

a driver for supplying a driving signal to the driving electrodes in a touch recognizing mode; and

a controller for receiving signals from the sensing electrodes,

wherein, in a noise measuring mode, the controller is configured to

cut off an electrical connection between one of the driving electrodes and the driver or between one of the sensing electrodes and the controller,

maintain an electrical connection between another one of the sensing electrodes and the controller, and

detect a noise signal from the other one of the sensing electrodes.

2. The touch screen panel according to claim 1, further comprising first switches between the driving electrodes and the driver.

3. The touch screen panel according to claim 2, wherein, in the noise measuring mode, the controller is further configured to turn off one of the first switches.

4. The touch screen panel according to claim 3, wherein, in the touch recognizing mode, the controller is configured to turn on the first switches.

5. The touch screen panel according to claim 1, further comprising second switches between the sensing electrodes and the controller.

6. The touch screen panel according to claim 5, wherein, in the noise measuring mode, the controller is further configured to turn off one of the second switches.

7. The touch screen panel according to claim 6, wherein, in the touch recognizing mode, the controller is configured to turn on the second switches.

8. The touch screen panel according to claim 1, further comprising:

first switches between respective ones of the driving electrodes and the driver; and

second switches between respective ones of the sensing electrodes and the controller.

9. The touch screen panel according to claim 8, wherein, in the noise measuring mode, the controller is further configured to

turn off one of the first switches, and

turn off one of the second switches.

10. The touch screen panel according to claim 9, wherein, in the touch recognizing mode, the controller is configured to turn on the first and second switches.

11. The touch screen panel according to claim 8, further comprising:

a common line;

third switches between the common line and respective common nodes between the respective ones of the driving electrodes and the first switches; and

fourth switches between the common line and respective common nodes between the respective ones of the sensing electrodes and the second switches.

12. The touch screen panel according to claim 11, wherein, in the noise measuring mode, the controller is further configured to turn on the third and fourth switches.

13. The touch screen panel according to claim 12, wherein, in the noise measuring mode, the controller is further configured to

turn off the first switches, and

turn off all but one of the second switches.

14. The touch screen panel according to claim 13, wherein, in the touch recognizing mode, the controller is configured to

turn on the first and second switches, and

turn off the third and fourth switches.

15. The touch screen panel according to claim 1, wherein, in the noise measuring mode, the controller is further configured to electrically connect the driving and sensing electrodes to each other.

16. A driving method of a touch screen panel, the method comprising:

cutting off an electrical connection between one of a plurality of driving electrodes and a driver or between one of a plurality of sensing electrodes and a controller, when the touch screen panel is in a noise measuring mode;

maintaining an electrical connection between another one of the sensing electrodes and the controller during the noise measuring mode; and

detecting a noise signal output from the other one of the sensing electrodes during the noise measuring mode.

17. The method according to claim 16, wherein the touch screen panel comprises first switches between respective ones of the driving electrodes and the driver.

18. The method according to claim 17, wherein the cutting off of the electrical connection comprises turning off one of the first switches.

19. The method according to claim 18, further comprising turning on the first switches when the touch screen panel is in a touch recognizing mode after the noise measuring mode.

20. The method according to claim 19, further comprising supplying a driving signal from the driver to the driving electrodes during the touch recognizing mode.

21. The method according to claim 16, wherein the touch screen panel comprises second switches between respective ones of the sensing electrodes and the controller.

22. The method according to claim 21, wherein the cutting off of the electrical connection comprises turning off one of the second switches.

23. The method according to claim 22, further comprising turning on the second switches when the touch screen panel is in a touch recognizing mode after the noise measuring mode.

24. The method according to claim 23, further comprising supplying a driving signal from the driver to the driving electrodes during the touch recognizing mode.

25. The method according to claim 16, wherein the touch screen panel comprises

first switches between respective ones of the driving electrodes and the driver, and

second switches between respective ones of the sensing electrodes and the controller.

26. The method according to claim 25, wherein the cutting off of the electrical connection comprises:

turning off one of the first switches; and

turning off one of the second switches.

27. The method according to claim 26, further comprising turning on the first and second switches when the touch screen panel is in a touch recognizing mode after the noise measuring mode.

28. The method according to claim 27, further comprising supplying a driving signal from the driver to the driving electrodes during the touch recognizing mode.

29. The method according to claim 25, wherein the touch screen panel further comprises

third switches between a common line and respective common nodes between the respective ones of the driving electrodes and the first switches, and

fourth switches between the common line and respective common nodes between the respective ones of the sensing electrodes and the second switches.

30. The method according to claim 29, further comprising turning on the third and fourth switches during the noise measuring mode.

31. The method according to claim 30, wherein the cutting off of the electrical connection further comprises:

turning off the first switches; and

turning off all but one of the second switches.

32. The method according to claim 31, further comprising turning on the first and second switches and turning off the third and fourth switches when the touch screen panel is in a touch recognizing mode after the noise measuring mode.

33. The method according to claim 16, further comprising electrically connecting the driving and sensing electrodes to each other during the noise measuring mode.