CN203520831U - Drive circuit, and shift register and pixel unit comprising same, and display device - Google Patents

Abstract

The utility model provides a driving circuit, a shift register comprising the driving circuit, a pixel unit and a display device. The driving circuit includes a driving amplification module, a touch screen driving module and a time-sharing driving control module, and the time-sharing driving control module sends a time-sharing driving control signal according to the first control signal and the second control signal; The control signal drives the OLED in the OLED driving phase, amplifies the touch sensor output signal in the touch screen driving phase, and controls the touch screen driving module to drive the touch screen according to the touch control signal and the amplified touch sensor output signal. The utility model performs time-sharing driving on the OLED and the touch screen, so that the OLED and the touch screen can be driven with fewer devices, and at the same time, the mutual crosstalk between the OLED drive signal and the touch screen drive signal can be effectively achieved.

Description

Driving circuit and shift register including same, pixel unit and display device

technical field

The utility model relates to the technical field of OLED touch screen driving, in particular to a driving circuit, a shift register comprising the driving circuit, a pixel unit and a display device. the

Background technique

With the rapid progress of display technology, display devices with touch function are gradually becoming more and more popular due to their advantages such as visual operation. According to the difference in relative positions between the touch panel and the display panel, the existing display devices with touch function can generally be divided into two types: on-cell touch panels and in-cell touch panels. Compared with the surface touch panel, the in-cell touch panel has thinner thickness and higher light transmittance. the

In the existing OLED display panel, each OLED relies on an OLED drive circuit composed of multiple TFT (Thin Film Transistor, thin film transistor) switches in a pixel unit on the array substrate to drive and emit light to achieve display. In the embedded touch panel, the touch sensor and the touch screen driving circuit are also fabricated in each pixel unit on the array substrate by using an array process. If the touch sensor and touch screen drive circuit are directly superimposed on the OLED pixel, a certain number of touch screen drive circuit TFTs need to be added, which requires additional space for a certain pixel unit, and since the OLED and the touch screen are driven by separate drive circuits, Therefore, it is easy to cause mutual crosstalk between the OLED driving signal and the touch screen driving signal. the

Utility model content

The main purpose of the utility model is to provide a driving circuit and a shift register including it, a pixel unit and a display device, which can drive the OLED and the touch screen in time division, so that the OLED and the touch screen can be driven with fewer devices. , and at the same time, the mutual crosstalk between the OLED driving signal and the touch screen driving signal can be effectively reduced. the

In order to achieve the above object, the utility model provides a driving circuit for time-sharing driving OLED and touch screen in an embedded OLED touch screen, including a driving amplification module, a touch screen driving module and a time-sharing driving control module, wherein,

The time-sharing drive control module is respectively connected with the touch sensor output signal terminal, the drive amplification module, the first control signal output terminal, the second control signal output terminal and the first voltage terminal, and is used to The second control signal sends a time-sharing drive control signal;

The touch screen drive module is respectively connected to the drive amplification module and the touch control signal output end, and is connected to the touch screen through the touch screen drive signal output end;

The drive amplification module is respectively connected to the OLED, the second voltage terminal, the data line and the scan line, and is used to drive the OLED in the OLED drive stage according to the time-sharing drive control signal, and to amplify the touch screen in the touch screen drive stage. The sensor outputs a signal, and controls the touch screen driving module to drive the touch screen according to the touch control signal and the amplified output signal of the touch sensor. the

During implementation, the drive amplifier module includes a drive transistor, an input transistor and a storage capacitor, wherein,

The gate of the drive transistor is connected to the output signal terminal of the touch sensor through the time-sharing drive control module, the first pole is respectively connected to the second voltage terminal and the touch screen drive module, and the second pole is respectively connected to the touch screen drive module through the time-sharing drive control module. The time-sharing drive control module is connected to the first voltage terminal, and the second pole is also connected to the anode of the OLED;

The gate of the input transistor is connected to the scan line, the first pole is connected to the data line, and the second pole is connected to the gate of the driving transistor;

The first end of the storage capacitor is connected to the gate of the driving transistor, and the second end is connected to the second pole of the driving transistor. the

During implementation, the time-sharing drive control module includes a first control transistor and a second control transistor, wherein,

The gate of the first control transistor is connected to the first control signal output terminal, the first pole is connected to the second pole of the driving transistor, and the second pole is connected to the first voltage terminal;

The gate of the second control transistor is connected to the second control signal output terminal, the first pole is connected to the gate of the driving transistor, and the second pole is connected to the touch sensor output signal terminal. the

During implementation, the touch screen drive module includes: a touch screen drive transistor, the gate of which is connected to the touch control signal output terminal, the first pole is connected to the first voltage terminal, and the second pole is connected to the touch screen drive signal output terminal. the

The utility model also provides a driving method, which is applied to the above-mentioned driving circuit, including:

Touch screen driving steps: when the first control signal and the second control signal are at the first level at the same time:

The time-sharing drive control module controls the drive amplifier module to amplify the output signal of the touch sensor, and controls the OLED to be in a reverse bias state;

When the touch control signal is at the first level, the touch screen drive module outputs a touch screen drive signal to drive the touch screen according to the amplified touch sensor output signal;

OLED driving step: when the first control signal and the second control signal are at the second level, the drive amplification module simultaneously outputs the first level of the scan line and the data line in the next clock cycle, driving the OLED. the

The utility model also provides a shift register, including the above-mentioned drive circuit of N stages;

The touch screen drive signal output end of the (M-1)th stage drive circuit is connected to the touch control signal output end of the Mth stage drive circuit;

M is a positive integer greater than 2 and less than or equal to N;

N is a positive integer greater than 2. the

The utility model also provides a pixel unit, comprising an OLED and the above-mentioned drive circuit, the drive circuit is connected to the anode of the OLED, and the cathode of the OLED is connected to the first voltage terminal. the

The utility model also provides a display device, which includes a plurality of the above-mentioned pixel units. the

Compared with the prior art, the drive circuit described in the utility model and the shift register, pixel unit and display device including it control the drive amplification module and the touch screen drive module to drive the OLED and the touch screen in a time-sharing manner through the time-sharing drive control module. On the basis of not increasing the drive signal, by adjusting the timing of the signal, the OLED and the touch screen can be driven in time, so that the OLED and the touch screen can be driven with fewer devices, and the OLED drive signal and the touch screen can be effectively driven. crosstalk between them. the

Description of drawings

Fig. 1 is the structural diagram of the first embodiment of the drive circuit described in the utility model;

Fig. 2 is the circuit diagram of the second embodiment of the driving circuit described in the utility model;

Fig. 3 is the signal timing diagram of the second embodiment of the drive circuit described in the utility model when working;

Fig. 3A, Fig. 3B, Fig. 3C, Fig. 3D are respectively the equivalent circuit diagrams of the four stages of the OLED driving stage of the second embodiment of the driving circuit described in the present invention;

Fig. 4 is the flowchart of the first embodiment of the driving method described in the utility model;

Fig. 5 is a flow chart of the second embodiment of the driving method described in the present invention. the

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. the

The transistors used in all embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics. In the embodiment of the present invention, in order to distinguish the two poles of the transistor except the gate, one pole is called the source, and the other pole is called the drain. In addition, transistors can be classified into N-type transistors or P-type transistors according to their characteristics. In the drive circuit provided by the embodiment of the present invention, all transistors are described by taking N-type transistors as an example. It can be easily imagined below, and therefore also within the scope of protection of the embodiments of the present utility model. the

As shown in Fig. 1, the first embodiment of the driving circuit described in the present invention is used for time-sharing driving OLED and touch screen in the embedded OLED touch screen, including time-sharing driving control module 11, touch screen driving module 12 and driving Amplifying module 13, wherein,

The time-sharing drive control module 11 is respectively connected to the touch sensor output signal terminal TS, the drive amplification module 13, the first control signal output terminal EN1, the second control signal output terminal EN2 and the first voltage terminal V1, for Send a time-sharing drive control signal according to the first control signal and the second control signal;

The touch screen drive module 12 is connected with the drive amplification module 12 and the touch control signal output terminal Select respectively, and is connected with the touch screen through the touch screen drive signal output terminal Sensor (only the Sensor is shown in FIG. touch screen connection);

The drive amplification module 13 is respectively connected to the OLED, the second voltage terminal V2, the data line Data and the scan line Scan, and is used to drive the OLED in the OLED drive phase according to the time-sharing drive control signal, and to drive the OLED in the OLED drive phase. The touch screen driving stage amplifies the output signal of the touch sensor, and controls the touch screen driving module 12 to drive the touch screen according to the touch control signal and the amplified output signal of the touch sensor. the

In the first embodiment of the driving circuit described in the utility model, the time-sharing driving control module 11 controls the driving amplification module 13 and the touch screen driving module 12 to drive the OLED and the touch screen in time-sharing. Above all, by adjusting the timing of the signal, the OLED and the touch screen are driven in time, so that the OLED and the touch screen can be driven with fewer devices, and at the same time, the mutual crosstalk between the OLED drive signal and the touch screen drive signal can be effectively achieved. the

In the driving circuit provided by the embodiment of the present invention, all transistors are described by taking N-type transistors as an example, wherein, the first pole of the N-type transistor can be the source, and the second pole of the N-type transistor can be the drain pole. It is conceivable that those skilled in the art can easily think of the implementation using P-type transistors without making creative efforts, so it is also within the protection scope of the embodiments of the present utility model. the

The second embodiment of the driving circuit described in the utility model is based on the first embodiment of the driving circuit described in the utility model. the

As shown in Figure 2, in the second embodiment of the drive circuit described in the present invention, the drive amplifier module 13 includes a drive transistor T1, an input transistor T2 and a storage capacitor C, wherein,

The gate of the drive transistor T1 is connected to the touch sensor output signal terminal TS through the time-sharing drive control module 11, the first pole is connected to the second voltage terminal V2 and the touch screen drive module 12 respectively, and the second pole is connected to the touch screen drive module 12. The two poles are respectively connected to the first voltage terminal V1 through the time-sharing drive control module 11, and the second pole is also connected to the anode of the OLED;

The gate of the input transistor T2 is connected to the scan line Scan, the first pole is connected to the data line Data, and the second pole is connected to the gate of the driving transistor T1;

The first end of the storage capacitor C is connected to the gate of the driving transistor T1, and the second end is connected to the second electrode of the driving transistor T2. the

In specific implementation, as shown in Figure 2, the touch sensor is a photoelectric sensor PD-TFT, and one end of the photoelectric sensor PD-TFT is the touch sensor output signal terminal TS; in the embodiment shown in Figure 2, the first The voltage terminal V1 inputs the level VDD, and the second voltage terminal inputs the reference level Vref. the

As shown in Figure 2, in the second embodiment of the drive circuit described in the present utility model, the time-division drive control module 11 includes a first control transistor T3 and a second control transistor T4, wherein,

The gate of the first control transistor T3 is connected to the first control signal output terminal EN1, the first pole is connected to the second pole of the driving transistor T1, and the second pole is connected to the first voltage terminal V1;

The gate of the second control transistor T4 is connected to the second control signal output terminal EN2, the first pole is connected to the gate of the driving transistor T1, and the second pole is connected to the touch sensor output signal terminal TS. the

As shown in FIG. 2, in the second embodiment of the drive circuit described in the present invention, the touch screen drive module 12 includes: a touch screen drive transistor T5, the gate of which is connected to the touch control signal output terminal Select, the first The pole is connected to the first voltage terminal V1, and the second pole is connected to the touch screen; the second pole of the touch screen drive transistor T5 is the touch screen drive signal output terminal Sensor. the

In FIG. 2 , point P is an end point connected to the second pole of T1 , and point Q is an end point connected to the gate of T1 . the

In the driving circuit shown in Figure 2, the transistors can all be N-type transistors, or they can all be P-type transistors. It is expected that when the transistors are all P-type transistors, the same function can be realized only by adjusting the high and low levels of the timing control signal accordingly. the

As shown in FIG. 3 , the second embodiment of the driving circuit described in the present invention is divided into two phases during operation: a touch screen driving phase and an OLED driving phase. the

As shown in Figure 3, the touch screen driver stage is divided into four stages:

The first stage: the first voltage terminal V1, the first control signal output terminal EN1, the second control signal output terminal EN2, the scanning line Scan and the data line Data output a high level, the touch control signal output terminal Select outputs a low level, and store Capacitor C begins to charge, the gate potential of T1 is high, VDD is grounded through T1 and T3, T5 is turned off, T2 and T4 are in the conduction state, and the circuit is initialized;

The second stage: the first voltage terminal V1, the first control signal output terminal EN1, the second control signal output terminal EN2 and the scanning line Scan output high level, the data line Data and the touch control signal output terminal Select output low level, storage Capacitor C starts to discharge, T1 is slightly open, T5 is closed, T3 is open, and T2 and T4 are in conduction state;

The third stage: the first voltage terminal V1, the first control signal output terminal EN1 and the second control signal output terminal EN2 output high level, the scanning line Scan, the data line Data and the touch control signal output terminal Select output low level, storage The voltage across the capacitor C is fully loaded on the gate of T1;

In the two cases of touch state and non-touch state, the open state of T1 is different, and the current through T1 is also different at this time;

T4 is off, T3 is on, T4 is on, T2 is off;

In the touch state, the current output by the PD-TFT is relatively large, and at this time, the gate potential of T1 can be directly pulled down through T4;

In the non-touch state, the current output by the PD-TFT is relatively small. Compared with the touch state, the gate potential of T1 is pulled down by a relatively small range;

In the touch state, the PD-TFT is turned on, and the gate voltage of the drive tube is greatly pulled down, so the drive tube is in a slightly open state when the gate voltage is at a high potential. In the non-touch state, the PD-TFT is not turned on, and the potential of point P is maintained well. When the gate voltage is at a high potential, the drive tube is fully turned on;

In the touch screen driving stage, the current through T1 is consistent with the signal output by the touch screen drive signal output terminal Sensor;

The fourth stage: the first voltage terminal V1, the first control signal output terminal EN1, the second control signal output terminal EN2 and the touch control signal output terminal Select output high level, the scan line Scan and data line Data output low level, T4 Open, T3 is open, T4 is in the conduction state, and T2 is closed. At this time, in the touch state and the non-touch state, the gate potential of T1 is different, so the voltage output by the sensor output terminal of the touch screen drive signal will be different, and then through the T5 The amplification effect makes the signals output by the touch screen drive signal output terminal Sensor in the touch state and non-touch state have different outputs, thereby driving the touch screen to work; as shown in Figure 3, the solid line in the fourth stage shows the signal of the touch state Schematic diagram, the dotted line in the fourth stage shows the schematic diagram of the signal in the non-touch state. the

As shown in Figure 3, the OLED driving stage is divided into four stages:

The first stage: the first voltage terminal V1, the second control signal output terminal EN2, the data line Data and the touch control signal output terminal Select output low level, the first control signal output terminal EN1 and the scanning line Scan output high level, T1 The drain of the OLED is in a floating state, the gate of T1 is placed at a low potential, T5 is turned off, T3 is turned on, T4 is turned off, T2 is turned on, the two ends of the OLED are reverse biased, the storage capacitor C is charged, and the voltage across the storage capacitor C Vc=VDL-Vref; VDL is the low level value output by the data line Data;

The second stage: the first voltage terminal V1 and the scanning line Scan output high level, the second control signal output terminal EN2, the data line Data and the touch control signal output terminal Select output low level, T5 is closed, T3 is closed, and T4 is closed , T2 is turned on, at this time T1 is turned on, and the potential of point P rises to VQ-Vth (VQ is the potential of point Q, and Vth is the threshold voltage of T1);

The third stage: the first voltage terminal V1, the first control signal output terminal EN1, the second control signal output terminal EN2 and the touch control signal output terminal Select output low level, the data line Data and scan line Scan output high level, T5 Turn off, T3 is off, T4 is off, the drain of T1 is suspended, the potential of point Q is pulled up to VDH, and the potential of point P also starts to be pulled up to Vp'. Considering the joint effect of the storage capacitor C and OLED's own capacitance Coled, get ${\mathrm{Vp}}^{\′}=(\mathrm{VDH}-\mathrm{Vref})\×\frac{\mathrm{Coled}}{\mathrm{Coled}+C}+\mathrm{Vth}-\mathrm{Vref};$ VDH is the high level value output by the data line Data;

The fourth stage: the first voltage terminal V1 outputs high level, the first control signal output terminal EN1, the second control signal output terminal EN2, the touch control signal output terminal Select, the data line Data and the scanning line Scan output low level, T5 Off, T3 off, T4 off, T2 off, at this time OLED starts to emit light, $I=K\&times;{(\mathrm{Vgs}-\mathrm{Vth})}^2=K\&times;{(\mathrm{VDL}-\mathrm{Vp}-\mathrm{Vth})}^2=K\&times;{(\mathrm{VDL}-\frac{\mathrm{Coled}}{\mathrm{Coled}+C}\&times;\mathrm{VDH}-\frac{C}{\mathrm{Coled}+C}\&times;\mathrm{Vref})}^2;$ Among them, Vp is the voltage value of point P at this time, and I is the current flowing through the OLED; during this process, Vref<<VDL;

In this way, the current passing through the OLED is not controlled by the threshold voltage Vth of T1 and is constant, which can improve the uniformity of the current passing through the OLED so as to achieve uniform brightness of the OLED. the

Fig. 3A, Fig. 3B, Fig. 3C and Fig. 3D are respectively the equivalent circuit diagrams of the four stages of the OLED driving stage of the second embodiment of the driving circuit described in the present invention. the

The embodiment of the utility model also provides a shift register, including the N-level above-mentioned driving circuit;

The touch screen drive signal output terminal of the (M-1) level drive circuit is connected to the touch control signal output terminal of the M level drive circuit;

M is a positive integer greater than 2 and less than or equal to N;

N is a positive integer greater than 2. the

In the shift register described in the embodiment of the present invention, the touch screen driving signal of the upper level driving circuit is used as the touch control signal of the lower level driving circuit, which can effectively prevent the crosstalk of the touch screen driving signal. the

As shown in Figure 4, the first embodiment of the driving method described in the present invention is applied to the above-mentioned driving circuit, including:

Touch screen driving step 41: when the first control signal and the second control signal are at the first level at the same time:

The time-sharing drive control module controls the drive amplifier module to amplify the output signal of the touch sensor, and controls the OLED to be in a reverse bias state;

When the touch control signal is at the first level, the touch screen drive module outputs a touch screen drive signal to drive the touch screen according to the amplified touch sensor output signal;

OLED driving step 42: when the first control signal and the second control signal are at the second level, the drive amplification module simultaneously outputs the first level of the scanning line and the data line in the next clock cycle, driving all Described OLED. the

As shown in Figure 5, the second embodiment of the driving method described in the present invention is applied to the second embodiment of the driving circuit described in the present invention, including:

Touch screen driving step 51: when the first control signal and the second control signal are at the first level at the same time: the time-sharing drive control module controls the touch sensor output signal to input the gate of the drive transistor, and controls the OLED to be in a reverse bias state ; The drive transistor amplifies the touch sensor output signal; when the touch control signal is at the first level, the touch screen drive transistor outputs a touch screen drive signal to drive the touch screen according to the amplified touch sensor output signal;

OLED driving step 52: when the first control signal and the second control signal are at the second level, the drive transistor outputs the first level at the same time as the scan line and the data line in the next clock cycle, driving the OLED. the

According to a specific implementation manner, the touch screen driving step 51 includes:

Pre-charging step: the first voltage terminal, the data line and the scanning line output a first level, the first control signal and the second control signal are at the first level, and the touch control signal is at the second level, The drive transistor and the input transistor are turned on, the touch screen drive transistor is turned off, the OLED is in a reverse bias state, the data signal output by the data line and the touch sensor output signal are input to the gate of the drive transistor, and the storage capacitor is charged;

Discharging step: the first voltage terminal and the scanning line output a first level, the first control signal and the second control signal are at a first level, and the data line outputs a second level, so The touch control signal is at the second level, the OLED drive transistor is slightly turned on, the input transistor is turned on, the touch screen drive transistor is turned off, the OLED is in a reverse bias state, and the touch sensor output signal is input to the drive the gate of the transistor, the storage capacitor is discharged;

Touch control step: the first voltage terminal outputs a first level, the first control signal and the second control signal are at a first level, and the scanning line and the data line output a second level, The touch control signal is at the second level, the input transistor is turned off, the touch screen drive transistor is turned off, and the OLED is in a reverse bias state; the touch sensor output signal passes the time-sharing drive control module to drive the The potential of the gate of the transistor is pulled low, and the drive transistor amplifies the output signal of the touch sensor;

Touch screen driving step: the first voltage terminal outputs a first level, the first control signal, the second control signal and the touch control signal are at the first level, and the scanning line and the data line The second level is output, the input transistor is turned off, the OLED is in a reverse bias state, the touch screen drive transistor is turned on, and the touch screen drive transistor sends a touch screen drive signal to drive the touch screen according to the amplified output signal of the touch sensor. the

According to a specific implementation manner, the OLED driving step 52 includes:

Pixel charging step: the first voltage terminal and the data line output a second level, the second control signal and the touch control signal are at the second level, and the first control signal is at the first level , the scanning line outputs a first level, the drain of the driving transistor is in a floating state, the gate of the driving transistor is placed at a low potential, the OLED is in a reverse bias state, and the storage capacitor is charged;

Pixel discharging step: the first voltage terminal and the data line output a second level, the second control signal and the touch control signal are at the second level, and the first control signal is at the first level , the scan line outputs a first level, the drive transistor is turned on, and the storage capacitor is discharged;

Data input step: the first voltage terminal outputs a second level, the first control signal and the second control signal output a second level, and the scanning line and the data line output a first level , the touch control signal is a first level, the drain of the driving transistor is suspended, the first level output by the data line is input into the storage capacitor, and the potential of the source of the driving transistor is pulled up;

OLED light emitting step: the first voltage terminal outputs a first level, the first control signal and the second control signal, the scanning line and the data line output a second level, and the touch control signal is the second level, the driving transistor is turned on to control the OLED to emit light. the

The embodiment of the present invention also provides a pixel unit, which includes an OLED and the above-mentioned drive circuit, the drive circuit is connected to the anode of the OLED, and the cathode of the OLED is connected to the first voltage terminal. the

The embodiment of the present utility model also provides a display device, including the above-mentioned pixel unit. the

Adopt drive circuit and method described in the embodiment of the present invention, shift register, pixel unit and display device, control described driving amplification module 13 and touch screen driving module 12 time-sharing driving OLED and touch screen through time-sharing drive control module 11, In this way, on the basis of not increasing the driving signal, by adjusting the timing of the signal, the OLED and the touch screen can be driven in time, so that the driving of the OLED and the touch screen can be completed with fewer devices, and the OLED driving signal can be effectively Crosstalk between touch screen drive signals. the

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes. the

The foregoing is a preferred embodiment of the present utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present utility model. Retouching should also be regarded as the scope of protection of the present utility model. the

Claims (7)

1. A drive circuit for time-sharing driving OLED and touch screen in an embedded OLED touch screen, characterized in that it includes a drive amplification module, a touch screen drive module and a time-sharing drive control module, wherein, The time-sharing drive control module is respectively connected with the touch sensor output signal terminal, the drive amplification module, the first control signal output terminal, the second control signal output terminal and the first voltage terminal, and is used to The second control signal sends a time-sharing drive control signal; The touch screen drive module is respectively connected to the drive amplification module and the touch control signal output end, and is connected to the touch screen through the touch screen drive signal output end; The drive amplification module is respectively connected to the OLED, the second voltage terminal, the data line and the scan line, and is used to drive the OLED in the OLED drive stage according to the time-sharing drive control signal, and to amplify the touch screen in the touch screen drive stage. The sensor outputs a signal, and controls the touch screen driving module to drive the touch screen according to the touch control signal and the amplified output signal of the touch sensor. the 2. drive circuit as claimed in claim 1, is characterized in that, described drive amplification module comprises drive transistor, input transistor and storage capacitance, wherein, The gate of the drive transistor is connected to the output signal terminal of the touch sensor through the time-sharing drive control module, the first pole is respectively connected to the second voltage terminal and the touch screen drive module, and the second pole is respectively connected to the touch screen drive module through the time-sharing drive control module. The time-sharing drive control module is connected to the first voltage terminal, and the second pole is also connected to the anode of the OLED; The gate of the input transistor is connected to the scan line, the first pole is connected to the data line, and the second pole is connected to the gate of the driving transistor; The first end of the storage capacitor is connected to the gate of the driving transistor, and the second end is connected to the second pole of the driving transistor. the 3. drive circuit as claimed in claim 2, is characterized in that, described time-sharing driving control module comprises first control transistor and second control transistor, wherein, The gate of the first control transistor is connected to the first control signal output terminal, the first pole is connected to the second pole of the driving transistor, and the second pole is connected to the first voltage terminal; The gate of the second control transistor is connected to the second control signal output terminal, the first pole is connected to the gate of the driving transistor, and the second pole is connected to the touch sensor output signal terminal. the 4. The drive circuit according to claim 3, wherein the touch screen drive module comprises: a touch screen drive transistor, the gate is connected to the touch control signal output end, and the first pole is connected to the first voltage end , the second pole is the touch screen drive signal output terminal. the 5. A kind of shift register, is characterized in that, comprises N-stage drive circuit as described in any one of claim 1 to 4; The touch screen drive signal output end of the (M-1)th stage drive circuit is connected to the touch control signal output end of the Mth stage drive circuit; M is a positive integer greater than 2 and less than or equal to N; N is a positive integer greater than 2. the 6. A pixel unit, characterized in that it comprises an OLED and the driving circuit according to any one of claims 1 to 4, the driving circuit is connected to the anode of the OLED, and the cathode of the OLED is connected to the second A voltage terminal is connected. the 7. A display device, comprising a plurality of pixel units according to claim 6. the

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