TOUCH DISPLAY SCREEN AND TOUCH DRIVING DETECTION METHOD THEREOF

• US 20180284942A1
• Filed: 03/27/2018
• Published: 10/04/2018
• Est. Priority Date: 03/29/2017
• Status: Active Grant

• Current Assignee: FocalTech Systems Co.,Ltd
• Original Assignee: FocalTech Systems Co.,Ltd
• Inventors: KUNG, Chen-Pang, LI, Hua
• Granted Patent: US 10,437,388 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A touch display screen and a touch driving detection method thereof are provided. The touch display screen includes a touch module and a display module. The touch module includes a touch electrode unit and a touch driving detection unit, a touch signal for acquiring a change in capacitance is transmitted between the touch driving detection unit and the touch electrode unit. The display module includes a display electrode unit and a display driving unit, the display driving unit transmits a display driving signal to the display electrode unit. A potential of the touch signal is dynamically adjusted based on potential information of the display driving signal of the display driving unit, or a potential of the display driving signal is dynamically adjusted based on potential information of the touch signal of the touch driving detection unit.

Claims

1. A touch driving detection method based on a touch display screen,

the touch display screen comprising:

a touch module comprising;

a touch electrode unit configured to construct a capacitive touch sensitive region; and

a touch driving detection unit configured to acquire a signal from the touch electrode unit and process the signal, wherein

a touch signal for acquiring a change in capacitance is transmitted between the touch driving detection unit and the touch electrode unit, and

a display module comprising;

a display electrode unit configured to implement an image display; and

a display driving unit configured to drive the display electrode unit, wherein

the display driving unit transmits a display driving signal to the display electrode unit, and

the touch driving detection method comprising;

establishing a potential information data channel between the touch driving detection unit and the display driving unit, wherein

the touch driving detection unit dynamically adjusts a potential of the touch signal based on potential information of the display driving signal of the display driving unit, or,

the display driving unit dynamically adjusts a potential of the display driving signal based on potential information of the touch signal of the touch driving detection unit.

2. The touch driving detection method based on a touch display screen according to claim 1, wherein,

the touch module is a mutual-capacitance touch module based on a mutual-capacitance principle, and the touch signal comprises a touch driving signal and a touch detection signal;

or

the touch module is a self-capacitance touch module based on a self-capacitance principle, and the touch signal comprises a touch driving signal.

3. The touch driving detection method based on a touch display screen according to claim 2, wherein the touch driving signal comprises at least two driving potentials, and a predefined potential difference is set between any two of the driving potentials.

4. The touch driving detection method based on a touch display screen according to claim 3, wherein

the touch driving signal is a square wave signal, a sine wave signal, or a composite sine wave signal comprising a triangular wave signal, and peak values or valley values of the touch driving signal are the driving potentials.

5. The touch driving detection method based on a touch display screen according to claim 1, wherein

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a peak potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as an intermediate potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a valley potential reference potential.

6. The touch driving detection method based on a touch display screen according to claim 2, wherein

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a peak potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as an intermediate potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a valley potential reference potential.

7. The touch driving detection method based on a touch display screen according to claim 3, wherein

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a peak potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as an intermediate potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a valley potential reference potential.

8. The touch driving detection method based on a touch display screen according to claim 4, wherein

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a peak potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as an intermediate potential reference potential;

or

the potential of the touch signal is dynamically adjusted by using the potential of the display driving signal as a valley potential reference potential.

9. The touch driving detection method based on a touch display screen according to claim 2, wherein

the touch module is the mutual-capacitance touch module based on the mutual-capacitance principle, the touch electrode unit is a mutual-capacitance touch electrode unit which constructs a mutual-capacitance touch sensitive region based on the mutual-capacitance principle, the touch electrode unit comprises one or more touch electrodes, each of the touch electrodes is configured to form a touch capacitor, and the touch detection signal is used to detect a signal quantity of the touch driving signal after the touch driving signal is coupled by the touch capacitor;

or

the touch module is the self-capacitance touch module based on the self-capacitance principle, the touch electrode unit is a self-capacitance touch electrode unit which constructs a self-capacitance touch sensitive region based on the self-capacitance principle, the touch electrode unit comprises one or more touch electrodes, and the touch detection signal is used to detect a signal quantity of the touch driving signal after a touch capacitor is charged and discharged by the touch driving signal.

10. A touch display screen, comprising:

a touch module comprising;

a touch electrode unit configured to construct a capacitive touch sensitive region; and

a touch driving detection unit electrically connected with the touch electrode unit, wherein

a touch signal for acquiring a change in capacitance is transmitted between the touch driving detection unit and the touch electrode unit, and

a display module comprising;

a display electrode unit configured to implement an image display; and

a display driving unit electrically connected with the display electrode unit, wherein

the display driving unit transmits a display driving signal to the display electrode unit, wherein

the display driving unit is electrically connected with the touch driving detection unit to establish a data channel for transmitting potential information, and

the touch driving detection unit dynamically adjusts a potential of the touch signal based on potential information of the display driving signal of the display driving unit, or,

the display driving unit dynamically adjusts a potential of the display driving signal based on potential information of the touch signal of the touch driving detection unit.

11. The touch display screen according to claim 10, wherein the display driving unit comprises a power control sub-unit electrically connected with the display electrode unit and configured to provide the display driving signal to the display electrode unit, and the power control sub-unit is further electrically connected with the touch driving detection unit to establish the data channel for transmitting potential information.

12. The touch display screen according to claim 10, wherein

the touch driving detection unit is an integrated circuit chip provided independently or a portion of an integrated circuit provided in an integrated circuit chip, and

the display driving unit is an integrated circuit chip provided independently or a portion of an integrated circuit provided in an integrated circuit chip.

13. The touch display screen according to claim 10, wherein

the touch module is a mutual-capacitance touch module based on a mutual-capacitance principle, the touch electrode unit is a mutual-capacitance touch electrode unit which constructs a mutual-capacitance touch sensitive region based on the mutual-capacitance principle, the touch driving detection unit is a mutual-capacitance touch driving detection unit, and the touch signal comprises a touch driving signal and a touch detection signal;

or

the touch module is a self-capacitance touch module based on a self-capacitance principle, the touch electrode unit is a self-capacitance touch electrode unit which constructs a self-capacitance touch sensitive region based on the self-capacitance principle, the touch driving detection unit is a self-capacitance touch driving detection unit, and the touch signal comprises a touch driving signal.

14. The touch display screen according to claim 10, wherein

the display driving unit and the touch driving detection unit are electrically connected with each other through analog signal interfaces of the display driving unit and the touch driving detection unit, to establish an analog data channel for transmitting potential information;

or

the display driving unit and the touch driving detection unit are electrically connected with each other through digital signal interfaces of the display driving unit and the touch driving detection unit, to establish a digital data channel for transmitting potential information.

15. The touch display screen according to claim 10, further comprising

a thin film package layer, wherein

the display module is an active matrix organic light emitting diode display module and further comprises a display medium layer and a display thin film transistor electrode substrate, and

the touch electrode unit and the display electrode unit are stacked, and the thin film package layer is arranged between the touch electrode unit and the display electrode unit.

16. A system for configuring a touch display screen, comprising:

the touch display screen comprising;

a touch module comprising;

a touch electrode unit configured to construct a capacitive touch sensitive region; and

a touch driving detection unit electrically connected with the touch electrode unit, wherein

a touch signal for acquiring a change in capacitance is transmitted between the touch driving detection unit and the touch electrode unit, and

a display module comprising;

a display electrode unit configured to implement an image display; and

a display driving unit electrically connected with the display electrode unit, wherein

the display driving unit transmits a display driving signal to the display electrode unit, and

a system data processing module electrically connected with the touch driving detection unit and the display driving unit to establish a data channel for transmitting potential information, wherein

the touch driving detection unit dynamically adjusts a potential of the touch signal based on potential information of the display driving signal of the display driving unit, or,

the display driving unit dynamically adjusts a potential of the display driving signal based on potential information of the touch signal of the touch driving detection unit.

17. The system for configuring a touch display screen according to claim 16, wherein

the touch driving detection unit is an integrated circuit chip provided independently or a portion of an integrated circuit provided in an integrated circuit chip, and

the display driving unit is an integrated circuit chip provided independently or a portion of an integrated circuit provided in an integrated circuit chip.

18. The system for configuring a touch display screen according to claim 16, wherein

the touch module is a mutual-capacitance touch module based on a mutual-capacitance principle, the touch electrode unit is a mutual-capacitance touch electrode unit which constructs a mutual-capacitance touch sensitive region based on the mutual-capacitance principle, the touch driving detection unit is a mutual-capacitance touch driving detection unit, and the touch signal comprises a touch driving signal and a touch detection signal;

or

the touch module is a self-capacitance touch module based on a self-capacitance principle, the touch electrode unit is a self-capacitance touch electrode unit which constructs a self-capacitance touch sensitive region based on the self-capacitance principle, the touch driving detection unit is a self-capacitance touch driving detection unit, and the touch signal comprises a touch driving signal.

19. The system for configuring a touch display screen according to claim 16, wherein

the display driving unit and the system data processing module are electrically connected with each other through first signal interfaces of the display driving unit and the system data processing module, and the touch driving detection unit and the system data processing module are electrically connected with each other through second signal interfaces of the touch driving detection unit and the system data processing module, to establish a data channel for transmitting potential information;

each of the first signal interfaces is an analog signal interface or a digital signal interface; and

each of the second signal interfaces is an analog signal interface or a digital signal interface.

20. The system for configuring a touch display screen according to claim 16, wherein

the touch display screen further comprises a thin film package layer,

the display module is an active matrix organic light emitting diode display module and further comprises a display medium layer and a display thin film transistor electrode substrate, and

the touch electrode unit and the display electrode unit are stacked, and the thin film package layer is arranged between the touch electrode unit and the display electrode unit.