Inverting circuit, driving method thereof, touch display panel and touch display device

• US 10,095,355 B2
• Filed: 05/19/2016
• Issued: 10/09/2018
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Yang, Shengji, Dong, Xue, Xue, Hailin, Chen, Xiaochuan, Liu, Yingming, Sun, Lingyu
• Primary Examiner(s): Adams, Carl
• Application Number:
  US15/159,150
• Publication Number:
  US 20170083155A1
• Time in Patent Office: 873 Days
• Field of Search: None
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 2310/0291 Details of output amplifiers or buffers arranged for use in a driving circuit
• CPC Class Codes: G09G 2310/067 Special waveforms for scanning, where no circuit details of the gate driver are given
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3283 in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements

Abstract

The present invention discloses an inverting circuit, a driving method thereof, a touch display panel and a touch display device. The inverting circuit includes an input module and an output module, the input module is used for controlling a potential of the first node, and the output module is used for controlling, under the control of the potential of the first node, an output signal of the first output terminal according to input signals of the first input terminal, the third voltage terminal and the third signal terminal. In the technical solutions provided by the present invention, a light-emitting control signal is switched off in a touch stage by means of time-sharing driving to lower the capacitance to ground of the touch electrode, so that resistive and capacitive load of the touch electrode is reduced, touch driving frequency is increased, and touch accuracy is thus improved.

Claims

1. An inverting circuit, including an input module and an output module, wherein

the input module is connected to a first input terminal, a first voltage terminal, a second voltage terminal, a first signal terminal, a second signal terminal and a first node, respectively, and is used for controlling a potential of the first node according to input signals of the first input terminal, the first voltage terminal, the second voltage terminal, the first signal terminal and the second signal terminal;

the output module is connected to the first node, the first input terminal, a third voltage terminal, a third signal terminal and a first output terminal, respectively, and is used for controlling, under the control of the potential of the first node, an output signal of the first output terminal according to input signals of the first input terminal, the third voltage terminal and the third signal terminal; and

the second voltage terminal is provided with a low level signal, and the third signal terminal is provided with a high level signal and a low level signal in a time sharing manner.

2. The inverting circuit according to claim 1, wherein the input module includes a first transistor, a second transistor and a first capacitor;

a gate of the first transistor is connected to the first input terminal, a first electrode of the first transistor is connected to the first voltage terminal, and a second electrode of the first transistor is connected to the first node;

a gate of the second transistor is connected to the first signal terminal, a first electrode of the second transistor is connected to the first node, and a second electrode of the second transistor is connected to the second voltage terminal; and

the first capacitor is connected in parallel between the first node and the second signal terminal.

3. The inverting circuit according to claim 1, wherein the output module includes a third transistor and a fourth transistor;

a gate of the third transistor is connected to the first input terminal, a first electrode of the third transistor is connected to the third voltage terminal, and a second electrode of the third transistor is connected to the first output terminal; and

a gate of the fourth transistor is connected to the first node, a first electrode of the fourth transistor is connected to the first output terminal, and a second electrode of the fourth transistor is connected to the third signal terminal.

4. A driving method of an inverting circuit, wherein the inverting circuit is the inverting circuit according to claim 1, the first voltage terminal is at a high level, the second voltage terminal is at a low level, the third voltage terminal is at a high level, and the driving method includes:

in a first stage, inputting a high level to the first input terminal, inputting a low level to the first signal terminal, inputting a high level to the second signal terminal, and inputting a low level to the third signal terminal;

in a second stage, inputting a low level to the first input terminal, inputting a high level to the first signal terminal, inputting a low level to the second signal terminal, and inputting a low level to the third signal terminal;

in a third stage, inputting a high level to the first input terminal, inputting a low level to the first signal terminal, inputting a high level to the second signal terminal, and inputting a low level to the third signal terminal;

in a fourth stage, inputting a high level to the first input terminal, inputting a high level to the first signal terminal, inputting a low level to the second signal terminal, and inputting a low level to the third signal terminal; and

in a fifth stage, inputting a high level to the first input terminal, inputting a low level to the first signal terminal, inputting a high level to the second signal terminal, and inputting a high level to the third signal terminal.

5. A touch display panel, including an inverting circuit including an input module and an output module, wherein

the input module is connected to a first input terminal, a first voltage terminal, a second voltage terminal, a first signal terminal, a second signal terminal and a first node, respectively, and is used for controlling a potential of the first node according to input signals of the first input terminal, the first voltage terminal, the second voltage terminal, the first signal terminal and the second signal terminal;

the output module is connected to the first node, the first input terminal, a third voltage terminal, a third signal terminal and a first output terminal, respectively, and is used for controlling, under the control of the potential of the first node, an output signal of the first output terminal according to input signals of the first input terminal, the third voltage terminal and the third signal terminal; and

the touch display panel further includes a substrate, a thin film transistor is provided on the substrate, a light-emitting diode is provided on the thin film transistor, and includes an anode, a light-emitting layer and a cathode, the cathode includes at least one touch electrode, a sense electrode is provided above the touch electrode, and the touch electrode and the sense electrode are arranged perpendicularly to each other to form a touch sensing matrix;

wherein

the touch electrode and the sense electrode are applied with touch driving signals in a touch stage; and

the anode of the light-emitting diode is applied with no driving signal in the touch stage.

6. The touch display panel according to claim 5, further including a pixel compensation circuit, which includes a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor and a tenth transistor, wherein a drain of the fifth transistor, a source of the sixth transistor and a gate of the seventh transistor are connected to the second node, a drain of the ninth transistor is connected to a source of the seventh transistor and a drain of the eighth transistor, a drain of the seventh transistor is connected to a source of the tenth transistor, a drain of the tenth transistor is connected to the light-emitting diode, and the output signal from the first output terminal of the inverting circuit is connected to gates of the eighth transistor and the tenth transistor to control the light-emitting diode to emit light.

7. A touch display device, including the touch display panel according to claim 6.

8. The touch display panel according to claim 5, further including a shift register circuit, which includes an eleventh transistor, a twelfth transistor, a thirteenth transistor, a fourteenth transistor, a fifteenth transistor, a sixteenth transistor and a seventeenth transistor, wherein a drain of the eleventh transistor is connected to a gate of the fifteenth transistor, a gate of the twelfth transistor and a drain of the seventeenth transistor, a drain of the thirteenth transistor is connected to a gate of the fourteenth transistor, a source of the twelfth transistor and a gate of the sixteenth transistor, and a drain of the fourteenth transistor is connected to a source of the fifteenth transistor, and provides an input signal for inputting to the first input terminal of the inverting circuit.

9. A touch display device, including the touch display panel according to claim 8.

10. The touch display panel according to claim 5, wherein the thin film transistor includes a gate, an active layer, a source and a drain, and the anode is connected to the drain;

and

the anode and the cathode are configured to be applied with display driving signals in a display stage.

11. The touch display panel according to claim 5, further including package glass and protective glass, wherein the package glass is provided between the sense electrode and the touch electrode, and the protective glass is provided on the sense electrode.

12. The touch display panel according to claim 5, wherein the touch electrode is strip-shaped.

13. A touch display device, including the touch display panel according to claim 5.