Touch sensitive processing apparatus and method thereof

• US 9,804,716 B2
• Filed: 11/10/2014
• Issued: 10/31/2017
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: Chang, Chin-Fu, Ho, Shun-Lung
• Primary Examiner(s): Elahi, Towfiq
• Application Number:
  US14/537,211
• Publication Number:
  US 20150130756A1
• Time in Patent Office: 1,086 Days
• Field of Search: 345173
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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

The present invention provides a touch processing device which is configured to connect to a touch sensitive panel having a plurality of sensing points. The touch processing device comprises a transmitter detecting module and an information transmitting module. The transmitter detecting module is configured to detect a transmitter transmitting an electrical signal only when approaching or touching the touch sensitive panel and to generate at least a two-dimensional sensing information. The at least one two-dimensional sensing information is sensing information corresponding to the plurality of sensing points with respect to at least one frequency. The information transmitting module is configured to transmit the at least one two-dimensional sensing information.

Claims

1. A touch processing device connected to a touch sensitive panel, wherein the touch sensitive panel includes a plurality of first electrodes, a plurality of second electrodes, and a plurality of sensing points formed at intersections of the plurality of first electrodes and the plurality of second electrodes, the touch processing device comprising:

a capacitive sensing module for detecting an external conductive object approaching or touching the touch sensitive panel by sequentially sending driving signals via the first electrodes and sensing induced driving signals via the second electrodes and generating a two-dimensional (2D) capacitive sensing information; and

a transmitter detecting module for detecting a transmitter that transmits an electrical signal via the second electrodes only when approaching or touching the touch sensitive panel in response to the driving signal sent from the capacitive sensing module is detected by the transmitter, and generating at least one two-dimensional (2D) sensing information;

wherein when the transmitter does not detect the driving signal transmitted by one of the plurality of first electrodes, it does not generate the electrical signal, when the transmitter detects the driving signal transmitted by one of the plurality of first electrodes, it generates the electrical signal;

wherein the transmitter is an active stylus;

wherein the at least one 2D sensing information is a sensing information corresponding to the plurality of sensing points with respect to at least one frequency.

2. The touch processing device of claim 1, further comprising:

an information transmitting module for transmitting the 2D capacitive sensing information and the at least one 2D sensing information.

3. The touch processing device of claim 2, wherein the 2D sensing information and the 2D capacitive sensing information are alternately transmitted in whole.

4. The touch processing device of claim 2, wherein the 2D sensing information and the 2D capacitive sensing information are alternately transmitted in parts.

5. The touch processing device of claim 2, wherein when the electrical signal is mixed by a plurality of frequencies, the transmitter detecting module is configured to generate a plurality of 2D sensing information, and the information transmitting module is configured to transmit the plurality of 2D sensing information, wherein each frequency corresponds to one of the plurality of 2D sensing information.

6. The touch processing device of claim 5, wherein the number of 2D sensing information generated by the transmitter detecting module is larger than or equal to the number of frequencies included in the electrical signal.

7. The touch processing device of claim 5, wherein a first 2D sensing information in the plurality of 2D sensing information includes a relative value with respect to a second 2D sensing information.

8. The touch processing device of claim 7, wherein the relative value is one of the following:

a difference;

a ratio; and

a fractional value.

9. The touch processing device of claim 5, wherein each of the plurality of 2D sensing information is alternately transmitted in whole.

10. The touch processing device of claim 5, wherein each of the plurality of 2D sensing information is alternately transmitted in parts.

11. The touch processing device of claim 1, wherein the capacitive sensing module allows a plurality of first electrodes on the touch sensitive panel to sequentially send out the driving signal, and the at least one 2D sensing information is generated when the capacitive sensing module is allowing the plurality of first electrodes on the touch sensitive panel to sequentially send out the driving signal.

12. The touch processing device of claim 1, wherein the capacitive sensing module allows a plurality of first electrodes on the touch sensitive panel to simultaneously send out the driving signal.

13. The touch processing device of claim 11, wherein the 2D sensing information is sensed from a plurality of second electrodes on the touch sensitive panel.

14. The touch processing device of claim 13, wherein the 2D capacitive sensing information and the 2D sensing information are generated according to signals received in a same period of time.

15. A touch processing method applicable to a touch processing device connected to a touch sensitive panel, wherein the touch sensitive panel includes a plurality of first electrodes, a plurality of second electrodes, and a plurality of sensing points formed at intersections of the plurality of first electrodes and the plurality of second electrodes, the touch processing method comprising:

detecting an external conductive object approaching or touching the touch sensitive panel by sequentially sending driving signals via the first electrodes and sensing induced driving signals via the second electrodes, and generating a 2D capacitive sensing information; and

detecting a transmitter that transmits an electrical signal via the second electrodes only when approaching or touching the touch sensitive panel in response to a driving signal sent from the touch sensitive panel during said detecting the external conductive object is detected by the transmitter, and generating at least one two-dimensional (2D) sensing information;

wherein when the transmitter does not detect the driving signal transmitted by one of the plurality of first electrodes, it does not generate the electrical signal, when the transmitter detects the driving signal transmitted by one of the plurality of first electrodes, it generates the electrical signal;

wherein the transmitter is an active stylus;

wherein the at least one 2D sensing information is a sensing information corresponding to the plurality of sensing points with respect to at least one frequency.

16. The touch processing method of claim 15, further comprising:

transmitting the 2D capacitive sensing information and the at least one sensing information.

17. The touch processing method of claim 16, wherein the 2D sensing information and the 2D capacitive sensing information are alternately transmitted in whole.

18. The touch processing method of claim 16, wherein the 2D sensing information and the 2D capacitive sensing information are alternately transmitted in parts.

19. The touch processing method of claim 16, wherein when the electrical signal is mixed by a plurality of frequencies, the method further includes:

generating a plurality of 2D sensing information; and

transmitting the plurality of 2D sensing information, wherein each frequency corresponds to one of the plurality of 2D sensing information.

20. The touch processing method of claim 19, wherein the number of 2D sensing information is larger than or equal to the number of frequencies included in the electrical signal.

21. The touch processing method of claim 19, wherein a first 2D sensing information in the plurality of 2D sensing information includes a relative value with respect to a second 2D sensing information.

22. The touch processing method of claim 21, wherein the relative value is one of the following:

a difference;

a ratio; and

a fractional value.

23. The touch processing method of claim 19, wherein each of the plurality of 2D sensing information is alternately transmitted in whole.

24. The touch processing method of claim 19, wherein each of the plurality of 2D sensing information is alternately transmitted in parts.

25. The touch processing method of claim 15, further comprising allowing a plurality of first electrodes on the touch sensitive panel to sequentially send out the driving signal, and the at least one 2D sensing information is generated when allowing the plurality of first electrodes on the touch sensitive panel to sequentially send out the driving signal.

26. The touch processing method of claim 15, further comprising allowing a plurality of first electrodes on the touch sensitive panel to simultaneously send out the driving signal.

27. The touch processing method of claim 25, further comprising sensing the 2D sensing information from a plurality of second electrodes on the touch sensitive panel.

28. The touch processing method of claim 27, wherein the 2D capacitive sensing information and the 2D sensing information are generated according to signals received in a same period of time.