MUTUAL CAPACITIVE TOUCH PANEL AND TOUCH CONTROL SYSTEM

• US 20140009437A1
• Filed: 03/15/2013
• Published: 01/09/2014
• Est. Priority Date: 07/05/2012
• Status: Active Grant

• Current Assignee: Ili Technology Corp. (MediaTek, Inc.)
• Original Assignee: MStar Semiconductor Incorporated (MediaTek, Inc.)
• Inventors: Hung, Guo-Kiang, Yeh, Ting-Hao
• Granted Patent: US 9,201,550 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• 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
• 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

Abstract

A single-layer mutual capacitive touch panel operable under control of a controller is provided. The mutual capacitive touch panel includes a first driving electrode, a second driving electrode, N number of first receiving electrodes surrounding the first driving electrode, M number of second receiving electrodes surrounding the second driving electrode, a driving channel, and (N+M) number of receiving channels. The controller simultaneously sends a driving signal to the first driving electrode and the second driving electrode via the driving channel. When sending the driving signal, the controller receives (N+M) number of sensing results via the (N+M) number of receiving channels. The N number of first receiving electrodes and the M number of second receiving electrodes correspond to different receiving channels.

Claims

1. A single-layer mutual capacitive touch panel, operable under control of a controller, comprising:

a first driving electrode;

a second driving electrode;

N number of first receiving electrodes, surrounding the first driving electrode;

M number of second receiving electrodes, surrounding the second driving electrode;

a driving channel, through which the controller simultaneously sends a driving signal to the first driving electrode and the second driving electrode; and

(N+M) number of receiving channels, respectively corresponding to one of the N number of first receiving electrodes and the M number of second receiving electrodes;

wherein, the N number of first receiving electrodes and the M number of second receiving electrodes respectively correspond to different receiving channels, the controller receives (N+M) number of sensing results via the (N+M) number of receiving channels when sending the driving signal, and N and M are positive integers.

2. The mutual capacitive touch panel according to claim 1, wherein the first driving electrode and the second driving electrode connect to a same driving channel.

3. The mutual capacitive touch panel according to claim 1, wherein the controller simultaneously receives the (N+M) number of sensing results via the (N+M) receiving channels.

4. The mutual capacitive touch panel according to claim 1, wherein planar profiles of the first driving electrode, the second driving electrode, the N number of first receiving electrodes and the M number of second receiving electrodes are rhombuses or triangles.

5. The mutual capacitive touch panel according to claim 1, further comprising:

a third driving electrode, wherein the controller drives the first driving electrode and the third driving electrode in a time-division manner; and

P number of third receiving electrodes, corresponding to the third driving electrode;

wherein, P is a positive integer, and one of the P number of third receiving electrodes and one of the N number of first receiving electrodes connect to a same receiving channel.

6. The mutual capacitive touch panel according to claim 5, wherein planar profiles of the first driving electrode, the second driving electrode, the third driving electrode, the N number of first receiving electrodes, the M number of second receiving electrodes and the P number of third receiving electrodes are rhombuses.

7. The mutual capacitive touch panel according to claim 6, wherein N, M and P are equal to 4, the first driving electrode, the third driving electrode and the second driving electrode are adjacently arranged in a row by vertices thereof, the four first receiving electrodes encompass four edges of the first driving electrodes, the four second receiving electrodes encompass four edges of the second driving electrode, and the four third receiving electrodes encompass four edges of the third driving electrode;

two of the four first receiving electrodes act as two of the four third receiving electrodes, and two of the four second receiving electrodes act as the remaining two of the four third receiving electrodes.

8. A single-layer mutual capacitive touch panel, operable with a controller, comprising:

a first driving electrode;

a second driving electrode;

a plurality of first receiving electrodes, surrounding the first driving electrode;

a plurality of second receiving electrodes, surrounding the second driving electrode;

two driving channels, respectively corresponding to the first driving electrode and the second driving electrode, through which the controller respectively sends a driving signal to the first driving electrode and the second driving electrode in a time-division manner; and

a receiving channel, through which the controller receives a sensing result, connected to one of the first receiving electrodes and one of the second receiving electrodes.

9. The mutual capacitive touch panel according to claim 8, wherein the first receiving electrode and the second electrode connecting to the receiving channel are a same receiving electrode.

10. The mutual capacitive touch panel according to claim 8, wherein planar profiles of the first driving electrode, the second driving electrode, the first receiving electrodes and the second receiving electrodes are rhombuses or triangles.

11. A single-layer mutual capacitive touch system, comprising:

a first driving electrode;

a second driving electrode;

N number of first receiving electrodes, surrounding the first driving electrode;

M number of second receiving electrodes, surrounding the second driving electrode;

a driving channel;

(N+M) number of receiving channels, respectively corresponding to one of the N number of first receiving electrodes and the M number of second receiving electrodes; and

a controller, simultaneously sending a driving signal to the first driving electrode and the second driving electrode through the driving channel, and receives (N+M) sensing results through the (N+M) receiving channels when sensing the driving signal, where N and M are positive integers.

12. The mutual capacitive touch system according to claim 11, wherein the first driving electrode and the second driving electrode connect to a same driving channel.

13. The mutual capacitive touch system according to claim 11, wherein the controller simultaneously receives the (N+M) number of sensing results via the (N+M) receiving channels.

14. The mutual capacitive touch system according to claim 11, wherein planar profiles of the first driving electrode, the second driving electrode, the N number of first receiving electrodes and the M number of second receiving electrodes are rhombuses or triangles.

15. The mutual capacitive touch system according to claim 11, further comprising:

a third driving electrode, wherein the controller drives the first driving electrode and the third driving electrode at different time points; and

P number of third receiving electrodes, corresponding to the third driving electrode;

wherein, P is a positive integer, and one of the P number of third receiving electrodes and one of the N number of first receiving electrodes connect to a same receiving channel.

16. The mutual capacitive touch system according to claim 15, wherein planar profiles of the first driving electrode, the second driving electrode, the third driving electrode, the N number of first receiving electrodes, the M number of second receiving electrodes and the P number of third receiving electrodes are rhombuses.

17. The mutual capacitive touch system according to claim 16, wherein N, M and P are equal to 4, the first driving electrode, the third driving electrode and the second driving electrode are adjacently arranged in a row by vertices thereof, the four first receiving electrodes encompass four edges of the first driving electrodes, the four second receiving electrodes encompass four edges of the second driving electrode, and the four third receiving electrodes encompass four edges of the third driving electrode;

two of the four first receiving electrodes act as two of the four third receiving electrodes, and two of the four second receiving electrodes act as the remaining two of the four third receiving electrodes.

18. A single-layer mutual capacitive touch system, comprising:

a first driving electrode;

a second driving electrode;

a plurality of first receiving electrodes, surrounding the first driving electrode;

a plurality of second receiving electrodes, surrounding the second driving electrode;

two driving channels, respectively corresponding to the first driving electrode and the second driving electrode;

a receiving channel, for connecting to one of the first receiving electrodes and one of the second receiving electrodes; and

a controller, sending a driving signal to the first driving electrode and the second driving electrode through the two channels in a time-division manner, respectively, and receiving a sensing result through the receiving channel.

19. The mutual capacitive touch system according to claim 18, wherein the first receiving electrode and the second receiving electrode connecting to the receiving channel are a same receiving electrode.

20. The mutual capacitive touch system according to claim 18, wherein planar profiles of the first driving electrode, the second driving electrode, the first receiving electrodes and the second receiving electrodes are rhombuses or triangles.