Low-power and low-frequency data transmission for stylus and associated signal processing

Patent metadata

Field	Value
Publication number	US-2019324564-A1
Application number	US-201916459342-A
Country	US
Kind code	A1
Filing date	Jul 1, 2019
Priority date	Aug 18, 2014
Publication date	Oct 24, 2019
Grant date	—

Abstract

A stylus includes a timer; a signal generator coupled to a stylus tip; a switch; and a controller comprising one or more computer-readable non-transitory storage media embodying logic. The logic is operable when executed to: in response to the switch of the stylus being ON, initiate the signal generator to generate a signal having a pre-determined frequency and a pre-determined voltage from the stylus tip, and activate the timer, and stop the generating of the signal when a timing of the activated timer reaches a pre-determined threshold.

First claim

1 . A stylus comprising:
a timer; a signal generator coupled to a stylus tip; a switch; and a controller comprising one or more computer-readable non-transitory storage media embodying logic that is operable when executed to:
in response to the switch being ON, initiate the signal generator to generate a signal having a pre-determined frequency and a pre-determined voltage from the stylus tip, and activate the timer, and
stop the generating of the signal when a timing of the activated timer reaches a pre-determined threshold.

2 . The stylus of claim 1 , wherein the switch comprises a mechanical element located on an exterior surface of the stylus.

3 . The stylus of claim 2 , wherein the switch comprises one or more of:
a mechanical button; a mechanical switch; and a mechanical slider.

4 . The stylus of claim 1 , wherein the logic is operable to:
determine that the switch is not ON; and disable the signal generator from generating the signal based on the determination that the switch is not ON.

5 . The stylus of claim 1 , wherein:
the signal generator comprises an oscillator; and the signal is 20V to 30V and 16 kHz.

6 . The stylus of claim 1 , comprising a power source.

7 . The stylus of claim 1 , wherein the switch comprises a touch sensitive surface located on an exterior surface of the stylus.

8 . A stylus controller comprising:
one or more computer-readable non-transitory storage media embodying logic that is operable when executed to:
in response to a switch of a stylus being ON, initiate generation of a signal having a pre-determined frequency and a pre-determined voltage from a tip of the stylus, and activate a timer of the stylus, and
stop the generation of the signal when a timing of the activated timer reaches a pre-determined threshold.

9 . The stylus controller of claim 8 , wherein the switch of the stylus comprises a mechanical element located on an exterior surface of the stylus.

10 . The stylus controller of claim 9 , wherein the switch of the stylus comprises one or more of:
a mechanical button; a mechanical switch; and a mechanical slider.

11 . The stylus controller of claim 8 , wherein the logic is operable to:
determine that the switch of the stylus is not ON; and disable the generation of the signal based on the determination that the switch of the stylus is not ON.

12 . The stylus controller of claim 8 , wherein the stylus comprises a power source.

13 . The stylus controller of claim 8 , wherein the switch of the stylus comprises a touch sensitive surface located on an exterior surface of the stylus.

14 . A method executed by a stylus, the method comprising:
in response to a switch of the stylus being ON, initiating generation of a signal having a pre-determined frequency and a pre-determined voltage from a tip of the stylus, and activating a timer of the stylus, and stopping the generation of the signal when a timing of the activated timer reaches a pre-determined threshold.

15 . The method of claim 14 , wherein the switch of the stylus comprises a mechanical element located on an exterior surface of the stylus.

16 . The method of claim 15 , wherein the switch of the stylus comprises one or more of:
a mechanical button; a mechanical switch; and a mechanical slider.

17 . The method of claim 14 , comprising:
determining that the switch of the stylus is not ON; and disabling the generation of the signal based on the determination that the switch of the stylus is not ON.

18 . The method of claim 14 , wherein the stylus comprises a power source.

19 . The method of claim 14 , wherein the signal is 20V to 30V and 16 kHz.

20 . The method of claim 14 , wherein the switch of the stylus comprises a touch sensitive surface located on an exterior surface of the stylus.

Assignees

• Wacom Co Ltd

Inventors

• Brunet Samuel
• Collins Richard
• Hristov Luben

Classifications

• G06F1/3228

  Monitoring task completion, e.g. by use of idle timers, stop commands or wait commands · CPC title

• G06F1/3287

  by switching off individual functional units in the computer system · CPC title

• G06F3/0442

  using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser · CPC title

• G06F1/3259

  Power saving in cursor control device, e.g. mouse, joystick, trackball · CPC title

• G06F3/04182

  Filtering of noise external to the device and not generated by digitiser components · CPC title