Active stylus, touch control device and touch control method

Patent metadata

Field	Value
Publication number	US-10901535-B2
Application number	US-201916456531-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Oct 18, 2018
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

An active stylus comprising: a pen body, a pen head connected to the pen body, and a first sensor disposed in at least one of the pen body and the pen head. The first sensor is configured to sense attitude information of the active stylus. The active stylus is adapted to realize touch control on the touch control device based on the attitude information, thereby generating an effect of simulating chalk writing and drawing.

First claim

The invention claimed is:

1. An active stylus, comprising:
a pen body,
a pen head connected to the pen body,
a first sensor disposed in at least one of the pen body and the pen head, the first sensor being configured to sense attitude information of the active stylus,
a gas passage disposed in the pen body, the gas passage comprising an air inlet and an air outlet, both of which communicate with ambient environment, the air inlet being disposed at the end of the pen body away from the pen head, and the air outlet being only disposed at a side of the pen body, and
a second sensor disposed in the gas passage, the second sensor being configured to sense at least one of a flow rate and pressure of a gas flow entering the gas passage.

2. The active stylus according to claim 1 , wherein the second sensor comprises at least one of a varistor, a thin film transistor, and a MEMS based gas pressure sensor.

3. The active stylus according to claim 1 , wherein the first sensor comprises at least one of a gyroscope and a gravity sensor.

4. The active stylus according to claim 1 , wherein the pen head is wedge shaped.

5. The active stylus according to claim 1 , further comprising a third sensor disposed in the pen head, the third sensor being configured to sense stress on a tip of the pen head.

6. A touch control device comprising the active stylus according to claim 1 and a touch control apparatus communicably connected to the active stylus;
wherein the touch control apparatus comprises:
a touch panel configured to obtain a touch position of the active stylus on the touch panel; and
a painting and writing unit configured to generate a painting or calligraphy according to the touch position and the attitude information of the active stylus.

7. The touch control device according to claim 6 , wherein the painting and writing unit comprises a first painting and writing subunit configured to:
determine a width of a stroke according to the attitude information of the active stylus, and
generate the painting or calligraphy according to the width of the stroke.

8. The touch control device according to claim 6 , wherein the active stylus further comprises a third sensor disposed in the pen head, the third sensor being configured to sense stress on a tip of the pen head, and the painting and writing unit comprises a second painting and writing subunit configured to:
determine a width of a stroke according to stress on the tip of the pen head, and
generate a painting or calligraphy according to the width of the stroke.

9. The touch control device according to claim 6 , wherein the painting and writing unit is further configured to generate a painting or calligraphy according to the touch position, the attitude information, and at least one of the flow rate and the pressure of the gas flow.

10. The touch control device according to claim 9 , wherein the touch panel is a touch display screen and further configured to display the painting or calligraphy.

11. The touch control device according to claim 9 , wherein the painting and writing unit further comprises a third painting and writing subunit configured to:
determine an initial position of a virtual droplet according to the touch position,
determine an initial size, a moving speed, and a moving distance of the virtual droplet according to at least one of the flow rate and the pressure of the gas flow;
determine a position and orientation of the active stylus relative to the touch display screen according to the attitude information of the active stylus and a spatial position information of the touch panel, and determine a moving direction of the virtual droplet according to the position and orientation; and
generate the painting or calligraphy according to the initial position, the initial size, the moving speed, the moving direction, and the moving distance of the virtual droplet.

12. The touch control device according to claim 11 , further comprising a first storage unit configured to store a virtual painting paper, wherein the virtual painting paper comprises virtual rice paper, virtual printing paper, virtual coarse paper, virtual corrugated paper, and virtual coated paper, and the third painting and writing subunit is further configured to select the virtual painting paper from the first storage unit as a background of the painting or calligraphy.

13. The touch control device according to claim 12 , further comprising a second storage unit configured to store a first table representing a relationship between the initial size and the moving speed of the virtual droplet and at least one of the flow rate and the pressure of the gas flow, a second table representing a degree of size reduction in the process of moving of the virtual droplet on different virtual painting paper, and a third table representing a diffusion length of the virtual droplet penetrating into the virtual painting paper in the process of moving of the virtual droplet on different virtual painting paper, and
wherein the third painting and writing subunit is further configured to:
determine the initial size, the moving speed, and the moving distance of the virtual droplet according to at least one of the flow rate and the pressure of the gas flow with reference to the first table; and
generate the painting or calligraphy according to the initial position, the initial size, the moving direction, the moving speed, and the moving distance of the virtual droplet and virtual paper with reference to the second table and the third table.

14. A touch control method for an active stylus according to claim 1 , comprising:
obtaining a touch position and attitude information of the active stylus;
generating a painting or calligraphy according to the touch position and attitude information of the active stylus; and
displaying the painting or calligraphy.

15. The touch control method according to claim 14 , wherein the generating a painting or calligraphy according to the touch position and attitude information of the active stylus comprises:
determining a width of a stroke according to the touch position and the attitude information of the active stylus, and generating the painting or calligraphy according to the width of the stroke.

16. The touch control method according to claim 14 , wherein the method further comprises obtaining at least one of a flow rate and pressure of the gas flow in the gas passage in the active stylus, and
wherein the generating a painting or calligraphy according to the touch position and attitude information of the active stylus comprises:
generating a painting or calligraphy according to the touch position, attitude information of the active stylus and the at least one of the flow rate and the pressure of the gas flow.

17. The touch control method according to claim 16 , wherein the generating a painting or calligraphy according to the touch position, attitude information of the active stylus and the at least one of the flow rate and the pressure of the gas flow comprises:
determining an initial position of the virtual droplet according to the touch position,
determining an initial size, a moving speed, and a moving distance of the virtual droplet
according to the at least one of the flow rate and the pressure of the gas flow;
determining a position and orientation of the active stylus relative to the touch display screen according to the attitude information of the active stylus and the spatial position information of the touch panel, and determining a moving direction of the virtual droplet according to the position and ori

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Kaifeng

Classifications

• G06T11/23

  using straight lines or curves · CPC title

• G06F3/04162

  for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware · CPC title

• G06F3/03545 Primary

  Pens or stylus · CPC title

• G06F3/0488

  using a touch-screen or digitiser, e.g. input of commands through traced gestures · 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