Touch display system, touch display method, active pen, and touch control device

Patent metadata

Field	Value
Publication number	US-2018335860-A1
Application number	US-201815968951-A
Country	US
Kind code	A1
Filing date	May 2, 2018
Priority date	May 16, 2017
Publication date	Nov 22, 2018
Grant date	—

Abstract

A touch display system includes a touch panel; a touch control chip configured to transmit a driving signal to the touch panel; an active pen configured to transmit a signal based on the driving signal of the touch control chip, the signal including two signal segments that are called a position signal and an ID signal, the touch control chip resolving the signal transmitted by the active pen to obtain an ID data carried by the ID signal and inquiring a property of the active pen corresponding to the ID data; and a display panel configured to display traces in accordance with the property of the active pen. Similar to the usage of a traditional marker pen, such an active panel is easily to be used by a user.

First claim

1 . A touch display system, comprising:
a touch panel; a touch control chip configured to periodically transmit a first driving signal to the touch panel; an active pen comprising a signal transmitting portion and a signal receiving portion, the signal receiving portion configured to sense the first driving signal transmitted by the touch control chip from the touch panel to generate a first sensing signal, the signal transmitting portion configured to transmit a second driving signal when the first sensing signal exceeds a threshold, the second driving signal comprising at least a position signal and at least an identification (ID) signal, the touch panel configured to sense the second driving signal to generate a second sensing signal, the touch control chip configured to receive the second sensing signal from the touch panel, resolve the second sensing signal to obtain an ID data representative of the ID signal, and inquire a property of the active pen corresponding to the ID data; and a display panel configured to receive the property of the active pen from the touch control chip and display traces in accordance with the property of the active pen.

2 . The touch display system according to claim 1 , wherein the touch panel comprises a plurality of driving electrodes and sensing electrodes arranged in a matrix and a plurality of conductive wires connecting to the driving electrodes and the sensing electrodes, and wherein the first driving signal transmitted from the touch control chip is applied to the driving electrodes and the second sensing signal is a signal received from the sensing electrodes by the touch control chip.

3 . The touch display system according to claim 2 , wherein the driving electrodes and the sensing electrodes comprises diamond electrode structures.

4 . The touch display system according to claim 1 , wherein the signal transmitting portion of the active pen transmits the ID signal of the second driving signal based on a frequency of the first driving signal transmitted by the touch control chip.

5 . The touch display system according to claim 1 , wherein the active pen comprises an active capacitive stylus.

6 . The touch display system according to claim 1 , wherein the property of the active pen is selected from a group consisting of color, tip size, and type of the active pen.

7 . A touch display method, comprising:
using a touch control chip to periodically transmit a first driving signal to a touch panel; using an active pen to sense the first driving signal transmitted by the touch control chip from the touch panel to generate a first sensing signal; using the active pen to transmit a second driving signal when the first sensing signal exceeds a threshold, the second driving signal comprising at least a position signal and at least an identification (ID) signal; using the touch panel to sense the second driving signal to generate a second sensing signal and receiving the second sensing signal from the touch panel; resolving the second sensing signal to obtain an ID data representative of the ID signal; inquiring a property of the active pen corresponding to the ID data; and based on the obtained property of the active pen, using a display panel to display traces in accordance with the property of the active pen.

8 . The touch display method according to claim 7 , wherein in the step of using the active pen to transmit the second driving signal, the ID signal of the second driving signal is transmitted based on a frequency of the first driving signal.

9 . The touch display method according to claim 7 , wherein the step of inquiring the property of the active pen corresponding to the ID data comprises:
looking up a table that records correspondence between the ID data and the property of the active pen.

10 . The touch display method according to claim 7 , wherein the property of the active pen is selected from a group consisting of color, tip size, and type of the active pen.

11 . An active pen, comprising:
a signal receiving portion configured to sensing a touch panel to generate a sensing signal; and a signal transmitting portion configured to transmit a driving signal when the sensing signal exceeds a threshold, wherein the driving signal comprises a position signal and an identification (ID) signal which are two segments of the driving signal, and the ID signal is representative of an ID data corresponding to the active pen.

12 . A touch control device, comprising:
a touch panel; and a touch control chip configured to receive a sensing signal from the touch panel, the sensing signal generated by the touch panel, the touch control chip further configured to resolve the sensing signal to obtain an identification (ID) data of an active pen, and inquire a property of the active pen corresponding to the ID data.

Assignees

• Silicon Integrated Systems Corp

Inventors

• Kuo Chin-Hua
• Yeh Jiun-Ying
• Yu Hsin-Hsuan
• Yeh Ying-Jyh

Classifications

• G06F3/03545 Primary

  Pens or stylus · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/04162

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

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title