Active Pen for a Touch Module, a Touch Input System and a Driving Method Thereof

Patent metadata

Field	Value
Publication number	US-2017192539-A1
Application number	US-201615335656-A
Country	US
Kind code	A1
Filing date	Oct 27, 2016
Priority date	Jan 4, 2016
Publication date	Jul 6, 2017
Grant date	—

Abstract

An active pen for a touch module, including: gravity sensing part, a signal transmitting part connected with an output end of said gravity sensing part; wherein, said gravity sensing part is configured to output a corresponding gravity sensing output signal according to an angle between said active pen and a horizontal plane; said signal transmitting part is configured to transmit said gravity sensing output signal to said touch module. Such active pen has no requirement on the material of the pen tip, reducing the cost.

First claim

What is claimed is:

1 . An active pen for a touch module, comprising: gravity sensing part, a signal transmitting part connected with an output end of the gravity sensing part; wherein,
the gravity sensing part is configured to output a corresponding gravity sensing output signal according to an angle between the active pen and a horizontal plane; the signal transmitting part is configured to transmit the gravity sensing output signal to the touch module.

2 . The active pen according to claim 1 , further comprising: an amplifier circuit,
an input end of the amplifier circuit is connected with the output end of the gravity sensing part, an output end of the amplifier circuit is connected with the signal transmitting part; the amplifier circuit is configured to perform an amplifying processing on the gravity sensing output signal with a corresponding amplification factor; the signal transmitting part is configured to transmit the amplifying-processed signal to the touch module.

3 . The active pen according to claim 1 , wherein, the amplifier circuit is configured at the nib of the active pen.

4 . The active pen according to claim 1 , wherein, a voltage value of the gravity sensing output signal output by the gravity sensing part increases with an increase of the angle between the active pen and a horizontal plane.

5 . The active pen according to claim 1 , wherein, a range of the angle between the active pen and a horizontal plane is [0, 90°].

6 . The active pen according to claim 4 , wherein, a relationship between the angle between the active pen and a horizontal plane and the voltage value of the gravity sensing output signal output by the gravity sensing part meets the following formula:
V out =V 0 ·sin α;
wherein, α indicates the angle between the active pen and a horizontal plane, V 0 indicates an initial input voltage value of the active pen, V out indicates the voltage value of the gravity sensing output signal.

7 . The active pen according to claim 2 , wherein, the amplifier circuit includes a switch and a plurality of amplifier units with different amplifier factors.

8 . The active pen according to claim 7 , wherein,
an end of the switch is connected with the gravity sensing part, the other end of the switch is selectively connected with an input end of an amplifier unit, output ends of the respective amplifier units are connected with the signal transmitting part, respectively.

9 . The active pen according to claim 8 , wherein, each of the amplifier units includes a first resistor, a second resistor and an operation amplifier;
a positive phase input end of the operation amplifier is connected with the other end of the switch, the negative phase input end of the operation amplifier is grounded through the first resistor, an output end of the operation amplifier is connected with the signal transmitting part, the second resistor is connected between the negative phase input end and the output end of the operation amplifier.

10 . A touch input system, comprising: a touch module and an active pen;
the active pen comprising: a gravity sensing part, a signal transmitting part connected with an output end of the gravity sensing part; the gravity sensing part is configured to output a corresponding gravity sensing output signal according to an angle between the active pen and a horizontal plane; the signal transmitting part is configured to transmit the gravity sensing output signal to the touch module; the touch module includes a plurality of touch electrodes, and a touch chip connected with the touch electrode; the touch chip is configured to, according to a signal transmitted from the active pen, received by the respective touch electrodes, detect a capacity change amount of the respective touch electrodes.

11 . The touch input system according to claim 10 , further comprising: a display chip;
the display chip is configured to, according to the capacity change amount of the respective touch electrodes detected by the touch chip, display a stroke thickness degree of the active pen at a touch position.

12 . A driving method for a touch input system, comprising:
obtaining the angle between the active pen and a horizontal plane; outputting a corresponding gravity sensing output signal according to an angle between the active pen and a horizontal plane; transmitting the gravity sensing output signal to a touch module.

13 . The method according to claim 12 , further comprising:
perform an amplifying processing on the gravity sensing output signal with a corresponding amplification factor; transmit the amplifying-processed signal to the touch module.

14 . The method according to claim 13 , further comprising:
according to a signal transmitted from the active pen, received by the respective touch electrodes in the touch module, detecting a capacity change amount of the respective touch electrodes.

15 . The method according to claim 14 , wherein, further comprising:
according to the capacity change amount of the respective touch electrodes detected by the touch chip, display a stroke thickness degree of the active pen at a touch position.

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Fang Zhixiang
• Zhang Dayu

Classifications

• G06F3/0383

  Signal control means within the pointing device · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0346

  with detection of the device orientation or free movement in a three-dimensional [3D] space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/03545 Primary

  Pens or stylus · CPC title