Capacitive touch device and mouse for near field communication

• US 10,236,935 B2
• Filed: 08/15/2017
• Issued: 03/19/2019
• Est. Priority Date: 12/10/2014
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: Chen, Yung-Wei, Wang, Yen-Chang, Chang, Yen-Min, Chen, Hsin-Chia
• Primary Examiner(s): Jia, Xin
• Application Number:
  US15/677,580
• Publication Number:
  US 20170346529A1
• Time in Patent Office: 581 Days
• CPC Class Codes: G06F 3/04162 for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
• 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
• CPC Class Codes: H04B 5/22 Capacitive coupling

Abstract

There is provided a capacitive communication system including an object and a capacitive touch panel. The object includes a plurality of induction conductors configured to have different potential distributions at different time intervals by modulating respective potentials thereof. The capacitive touch panel includes a plurality of sensing electrodes configured to form a coupling electric field with the induction conductors to detect the different potential distributions at the different time intervals. When the different potential distributions match a predetermined agreement between the object and the capacitive touch panel, a near field communication is formed between the object and the capacitive touch panel.

Claims

1. A mouse, comprising:

a plurality of induction conductors, wherein at least one of the plurality of induction conductors is configured to transmit clock data, and one of the plurality of induction conductors is configured as a positioning bit configured for indicating a direction of the mouse; and

a controller coupled to the plurality of induction conductors, and configured to respectively modulate a potential of each of the plurality of induction conductors with a fixed cycle to generate a potential variation as identification data which indicates the mouse as a specific object.

2. The mouse as claimed in claim 1, wherein the mouse has two induction conductors.

3. The mouse as claimed in claim 1, wherein the controller is configured to modulate at least one of an amplitude, a frequency and a phase of the potentials.

4. The mouse as claimed in claim 1, wherein the plurality of induction conductors has a predetermined area, a predetermined potential and a predetermined arrangement.

5. The mouse as claimed in claim 1, wherein the plurality of induction conductors is further configured to send transmission data via a near field communication after the mouse receives a transmission start signal.

6. A capacitive touch device, configured to perform a near field communication with an object which comprises a plurality of induction conductors one of which is configured as a positioning bit, the capacitive touch device comprising:

at least one sensing electrode configured to form a coupling electric field with the plurality of induction conductors, wherein the sensing electrode is configured to output a detection signal according to the coupling electric field;

a detection circuit coupled to the sensing electrode and configured to modulate the detection signal respectively with two signals to generate two detection components; and

a processing unit configured to identify whether the object is a specific object according to the detection signal, and recognize a direction of the object with respect to the capacitive touch device according to the positioning bit,

wherein the processing unit is configured to obtain a norm of vector according to the two detection components, and compare a plurality of norm of vectors with a predetermined code to identify whether the object is the specific object.

7. The capacitive touch device as claimed in claim 6, wherein the capacitive touch device is integrated on a notebook computer.

8. The capacitive touch device as claimed in claim 6, wherein the sensing electrode is configured to detect a sum of potentials of the plurality of induction conductors.

9. The capacitive touch device as claimed in claim 6, comprising a plurality of sensing electrodes configured to detect a respective potential of each of the plurality of induction conductors.

10. The capacitive touch device as claimed in claim 6, wherein the processing unit is further configured to enter a near field communication mode when identifying at least one of a predetermined area, a predetermined potential and a predetermined arrangement of the plurality of induction conductors.

11. The capacitive touch device as claimed in claim 10, wherein in the near field communication mode, the processing unit is further configured to output a transmission start signal when the detection signal matches a predetermined code.

12. The capacitive touch device as claimed in claim 10, wherein in the near field communication mode, the processing unit is further configured to control the capacitive touch device to output a response transmission data when the detection signal matches a predetermined code.

13. The capacitive touch device as claimed in claim 10, wherein when the near field communication mode is entered, the processing unit stops identifying a touch event according to the detection signal.

14. A mouse, comprising:

a plurality of induction conductors configured to have different potential distributions at different time intervals by modulating respective potentials on the induction conductors after entering a near field communication mode,

wherein the induction conductors have predetermined areas, a predetermined potential distribution before entering the near field communication mode and a predetermined arrangement to distinguish the mouse from other objects,

a part of the plurality of induction conductors are further configured to send transmission data via a near field communication after the mouse receives a transmission start signal, and

at least one of the plurality of induction conductors is configured to transmit clock data, and the induction conductor configured to send the transmission data is different from that configured to send the clock data.

15. The mouse as claimed in claim 14, wherein plurality of induction conductors are arranged at a bottom surface of the mouse.

16. The mouse as claimed in claim 14, wherein the modulating is to modulate at least one of an amplitude, a frequency and a phase of the potentials.