CAPACITIVE TYPE TOUCH SENSING DEVICE

• US 20150009421A1
• Filed: 10/23/2013
• Published: 01/08/2015
• Est. Priority Date: 07/05/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHOI, Jae Won, KIM, Hak Sun
• Granted Patent: US 10,088,959 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch sensing device includes: a touch panel including a plurality of first electrodes arranged substantially in a matrix form and a plurality of second electrodes arranged substantially in a matrix form; and a sensing signal control unit connected to the touch panel, where the sensing signal control unit includes a first switching block, and the first switching block includes a plurality of first switches which are connected between a plurality of first signal lines connected to the first electrodes and a plurality of first track lines crossing the first signal lines.

Claims

1. A touch sensing device, comprising:

a touch panel comprising a plurality of first electrodes arranged substantially in a matrix form and a plurality of second electrodes arranged substantially in a matrix form; and

a sensing signal control unit connected to the touch panel, wherein the sensing signal control unit comprises a first switching block,

wherein the first switching block comprises a plurality of first switches which are connected between a plurality of first signal lines connected to the first electrodes, and a plurality of first track lines crossing the first signal lines.

2. The touch sensing device of claim 1, wherein

a portion of the first signal lines are connectable to each other through the first switches which are short-circuited in the first switching block.

3. The touch sensing device of claim 2, wherein

a portion of the second electrodes disposed in a same column or in a same row among the second electrodes are connected to each other through a connector in the touch panel.

4. The touch sensing device of claim 3, wherein

a portion of the first signal lines connected to first electrodes disposed in a same row or in a same column among the first electrodes are connectable to each other through the first switches which are short-circuited in the first switching block.

5. The touch sensing device of claim 4, wherein

one of a first electrode of the first electrodes and a second electrode of the second electrodes receives a sensing input signal from the sensing signal control unit, and

the other of the first electrode and the second electrode outputs a sensing output signal to the sensing signal control unit.

6. The touch sensing device of claim 5, wherein

the first electrode and the second electrode are neighboring each other, and

the first electrode and the second electrode form a mutual sensing capacitor.

7. The touch sensing device of claim 1, wherein

the first signal lines are respectively connectable to different first track lines from each other through the first switches which are short-circuited in the first switching block.

8. The touch sensing device of claim 7, wherein

a portion of the second electrodes disposed in a same column or in a same row among the second electrodes are connectable to each other through a connector in the touch panel.

9. The touch sensing device of claim 8, wherein

one of a first electrode of the first electrodes and a second electrode of the second electrodes receives a sensing input signal from the sensing signal control unit, and

the other of the first electrode and the second electrode outputs a sensing output signal to the sensing signal control unit.

10. The touch sensing device of claim 9, wherein

the first electrode and the second electrode are neighboring each other, and

the first electrode and the second electrode form a mutual sensing capacitor.

11. The touch sensing device of claim 1, wherein

the sensing signal control unit further comprises a second switching block, and

the second switching block comprises a plurality of second switches which are connected between a plurality of second signal lines connected to the second electrodes and a plurality of second track lines crossing the second signal lines.

12. The touch sensing device of claim 11, wherein

a portion of the first signal lines are connectable to each other through the first switches which are short-circuited in the first switching block.

13. The touch sensing device of claim 12, wherein

a portion of the second signal lines are connectable to each other through the second switches which are short-circuited in the second switching block.

14. The touch sensing device of claim 12, wherein

a portion of the first signal lines connected to first electrodes disposed in a same row or in a same column among the first electrodes are connectable to each other through the first switches which are short-circuited in the first switching block.

15. The touch sensing device of claim 14, wherein

a portion of the second signal lines are connectable to each other through the second switches which are short-circuited in the second switching block.

16. The touch sensing device of claim 15, wherein

a portion of the second signal lines connected to the second electrodes disposed in a same row or in a same column among the second electrodes are connectable to each other through the second switches which are short-circuited in the second switching block.

17. The touch sensing device of claim 16, wherein

one of a first electrode of the first electrodes and a second electrode of the second electrodes receives a sensing input signal from the sensing signal control unit, and

the other of the first electrode and the second electrode outputs a sensing output signal to the sensing signal control unit.

18. The touch sensing device of claim 17, wherein

the first electrode and the second electrode are neighboring each other, and

the first electrode and the second electrode form a mutual sensing capacitor.

19. The touch sensing device of claim 11, wherein

the first signal lines are respectively connectable to different first track lines from each other through the first switches which are short-circuited in the first switching block.

20. The touch sensing device of claim 19, wherein

the second signal lines are respectively connectable to different second track lines from each other through the second switches which are short-circuited in the second switching block.

21. The touch sensing device of claim 20, wherein

each of the first electrode and the second electrode receives a sensing input signal and outputs a sensing output signal.

22. The touch sensing device of claim 21, wherein

each of the first electrode and the second electrode forms a self-sensing capacitor.