CN111625133B

CN111625133B - OLED display panel

Info

Publication number: CN111625133B
Application number: CN202010414437.5A
Authority: CN
Inventors: 叶剑
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2022-11-25
Anticipated expiration: 2040-05-15
Also published as: CN111625133A

Abstract

The application provides an OLED display panel, in the OLED display panel, touch wires correspond to touch electrodes one by one and are electrically connected with the touch electrodes; the touch control module is electrically connected with the touch routing and is used for controlling the touch electrode; the pixel unit comprises a light-emitting device, wherein the light-emitting device comprises an anode, an organic light-emitting layer and a cathode which are sequentially arranged; the cathode is used as the touch electrode. According to the application, the cathode is used as a touch electrode, and the integration of touch and display is realized through time-sharing multiplexing.

Description

OLED display panel

Technical Field

The application relates to the technical field of display, in particular to an OLED display panel.

Background

At present, there are two schemes for matching a touch structure on a Light-emitting device (OLED) display panel, which are to attach a touch electrode unit on the Light-emitting device display panel and to fabricate the touch electrode unit on the Light-emitting device display panel.

However, in either case, the touch electrode unit and the light emitting device display panel are independent from each other, and the touch unit needs to be separately manufactured, which is costly.

Disclosure of Invention

The embodiment of the application provides an OLED display panel to solve the technical problem that the manufacturing cost of the existing display panel is high.

The embodiment of the present application provides an OLED display panel, which includes:

a plurality of touch electrodes;

the touch control wires correspond to the touch control electrodes one by one and are electrically connected with the touch control electrodes;

the touch control module is electrically connected with the touch routing and is used for controlling the touch electrode;

the pixel unit comprises a light-emitting device, wherein the light-emitting device comprises an anode, an organic light-emitting layer and a cathode which are arranged in sequence; and

the display control module is electrically connected to the pixel unit;

wherein the cathode is used as the touch electrode.

In the OLED display panel according to the embodiment of the present application, the pixel unit further includes a driving circuit, and the driving circuit is configured to drive the light emitting device to emit light;

the driving circuit comprises a first reset module, a second reset module, a compensation module and a light emitting control module;

the light-emitting control module is used for receiving a first driving signal and driving the light-emitting device to emit light under the control of the first driving signal;

the first reset module is used for receiving a second driving signal and transmitting a reference signal to the compensation module under the control of the second driving signal so as to reset the compensation module;

the second reset module is used for receiving a third driving signal and transmitting the reference signal to the light-emitting device under the control of the third driving signal so as to reset the light-emitting device;

and the compensation module is used for receiving the third driving signal, writing a data signal under the control of the third driving signal and performing threshold voltage compensation.

In the OLED display panel according to the embodiment of the present application, the first reset module includes a fourth transistor, a control terminal of the fourth transistor is connected to the second driving signal, a first terminal of the fourth transistor is connected to the reference signal, and a second terminal of the fourth transistor is connected to the compensation module.

In the OLED display panel according to the embodiment of the application, the second reset module includes a seventh transistor, a control terminal of the seventh transistor is connected to the third driving signal, a first terminal of the seventh transistor is connected to the reference signal, and a second terminal of the seventh transistor is connected to an anode of the light emitting device.

In the OLED display panel according to the embodiment of the application, the compensation module includes a first transistor, a second transistor, a third transistor and a storage capacitor, a control end of the first transistor is connected to the second end of the storage capacitor, a first end of the third transistor and the first reset module, a first end of the first transistor is connected to the second end of the second transistor and the light emitting control module, a second end of the first transistor is connected to the second end of the third transistor and the light emitting control module, a first end of the second transistor is connected to the data signal, a control end of the second transistor and a control end of the third transistor are both connected to the third driving signal, and a first end of the storage capacitor is connected to the light emitting control module.

In the OLED display panel according to the embodiment of the application, the light emitting control module includes a fifth transistor and a sixth transistor, a control end of the fifth transistor is connected to the first driving signal, a first end of the fifth transistor is connected to a power signal, and a second end of the fifth transistor is connected to a first end of the first transistor; the control end of the sixth transistor is connected to the first driving signal, the first end of the sixth transistor is connected to the second end of the first transistor, and the second end of the sixth transistor is connected to the anode.

In the OLED display panel according to the embodiment of the present application, a driving timing of the OLED display panel in one frame of display image includes:

a first stage of resetting the control terminal of the first transistor;

in the second stage, the threshold voltage of the first transistor is captured and stored on the storage capacitor, and the light-emitting device is reset;

a third stage in which the driving circuit generates a driving current and supplies the driving current to the light emitting device to cause the light emitting device to emit light; and

and in the fourth stage, resetting the light-emitting device, and accessing the touch electrode into a touch signal to realize touch operation.

In the OLED display panel according to the embodiment of the present application, in the first stage, the first driving signal is a high level signal, the second driving signal is a low level signal, the third driving signal is a high level signal, the fourth transistor is turned on, and the reference signal is transmitted to the control terminal of the first transistor.

In the OLED display panel according to the embodiment of the application, in the second stage, the reference signal is a low level signal, the first driving signal is a high level signal, the second driving signal is a high level signal, the third driving signal is a low level signal, the second transistor, the third transistor, and the seventh transistor are turned on, and the data signal is transmitted to the second end of the storage capacitor through the second transistor, the first transistor, and the third transistor; the power supply signal is transmitted to the first end of the storage capacitor, and the first transistor is turned off when the voltage difference between the control end and the first end of the first transistor is equal to the threshold value of the first transistor; the reference signal is transmitted to an anode of the light emitting device.

In the OLED display panel according to this embodiment of the application, in the third phase, the first driving signal is a low level signal, the second driving signal is a high level signal, the third driving signal is a high level signal, the fifth transistor and the sixth transistor are turned on, and the power signal is transmitted to the first end of the first transistor through the fifth transistor; the first transistor is used for determining the magnitude of a driving current, and the sixth transistor transmits the driving current to the light emitting device.

In the OLED display panel according to the embodiment of the application, in the fourth stage, the reference signal is a low level signal, the first driving signal is a high level signal, the second driving signal is a high level signal, the third driving signal is a low level signal, the second transistor, the third transistor and the seventh transistor are turned on, and the data signal is transmitted to the second end of the storage capacitor through the second transistor, the first transistor and the third transistor; the power supply signal is transmitted to the first end of the storage capacitor, and the first transistor is turned off when the voltage difference between the control end and the first end of the first transistor is equal to the threshold value of the first transistor; the reference signal is transmitted to an anode of the light emitting device; the touch electrode is connected with a touch signal.

In the OLED display panel according to the embodiment of the present application, in one frame of display screen, the driving timing sequence includes at least one of the fourth stages and at least two of the third stages, and the third stages and the fourth stages are alternately arranged;

the duration of the third phase is greater than the duration of the fourth phase.

In the OLED display panel according to the embodiment of the present application, the OLED display panel further includes a display control module electrically connected to the pixel unit, and the touch control module and the display control module are integrated to form a control chip.

The OLED display panel of this application is through regarding the negative pole as touch electrode to through timesharing multiplexing realization touch-control and demonstration integration, promptly, OLED display panel is in luminous stage, and touch electrode is as the negative pole of light emitting device 14a, and in touch-control stage, touch electrode is used for sensing touch signal, in order to realize touch-control and demonstration integration, thereby has reduced manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic plan view illustrating an OLED display panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of an OLED display panel according to an embodiment of the present disclosure;

FIG. 3 is a schematic circuit diagram of a driving circuit of an OLED display panel according to an embodiment of the present disclosure;

fig. 4 is a timing diagram of driving signals and touch signals of an OLED display panel according to an embodiment of the present disclosure;

fig. 5A to 5D are schematic current paths of the driving circuit of the OLED display panel according to the embodiment of the disclosure at each stage of the driving sequence shown in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic plan view illustrating an OLED display panel according to an embodiment of the present disclosure; fig. 2 is a schematic cross-sectional structural diagram of an OLED display panel according to an embodiment of the present application.

The embodiment of the application provides an OLED display panel 100, which includes a plurality of touch electrodes 11, a plurality of touch traces 12, a touch control module 13, a plurality of pixel units 14, and a display control module 15.

The touch traces 12 correspond to the touch electrodes 11 one by one and are electrically connected to each other. The touch trace 12 may be disposed on the same layer as the cathode 143, or disposed on a different layer from the cathode 143.

The touch control module 13 is electrically connected to the touch trace 12 and configured to control the touch electrode 11.

The pixel unit 14 includes a light emitting device 14a and a driving circuit 14b, the driving circuit 14b is used for driving the light emitting device 14a to emit light, and the driving circuit 14b is electrically connected to the light emitting device 14a. The light emitting device 14a is disposed on the driving circuit 14 b. The light emitting device 14a includes an anode 141, an organic light emitting layer 142, and a cathode 143 disposed in this order. The display control module 15 is electrically connected to the pixel unit 14.

It should be noted that the driving circuit 14b is formed in the thin film transistor film stack structure of the bottom gate structure of the OLED display panel, but is not limited thereto, and the thin film transistor film stack structure may also be a top gate structure. In the present embodiment, the thin film transistor film stack structure includes a gate metal layer 14b1, an active layer 14b2, a source-drain metal layer 14b3, and the like. In this embodiment, the touch trace 12 and the source-drain metal layer 14b3 are disposed on the same layer. Since the film stack structure of the thin film transistor is the prior art, the details thereof are not repeated herein.

Wherein, the cathode 143 serves as the touch electrode 11.

According to the OLED display panel, the cathode 143 serves as the touch electrode 11, and touch and display integration is achieved through time division multiplexing, that is, in the light emitting stage of the OLED display panel 100, the touch electrode 11 serves as the cathode of the light emitting device 14a, and in the touch stage, the touch electrode 11 is used for sensing a touch signal to achieve touch and display integration, so that the production cost is reduced.

Specifically, the touch electrode 11 may include a cathode 143 for the light emitting device 14a of one or more pixel units 14.

For example, the touch electrodes 11 are arranged in an array, and the touch electrodes 11 form a self-capacitance electrode array, so that the touch detection can be performed. Alternatively, the touch electrodes 11 have the same shape, such as a rectangle. Preferably, the touch electrode 11 has a square shape. However, the shape of the touch electrode 11 is not limited to this, and may be circular, rhombic, or trapezoidal.

In addition, the touch control module 13 and the display control module 15 are integrated to form a control chip. That is, a Touch and Display Driver chip (Touch and Display Integration) is used to realize the Touch and Display functions, thereby saving the layout space and reducing the cost.

As shown in fig. 3, in the OLED display panel 100 according to the present embodiment, the driving circuit 14b includes a first reset module 144, a second reset module 145, a compensation module 146, and a light emitting control module 147.

The light emission control module 147 is used for receiving a first driving signal em [ n ] and driving the light emitting device 14a to emit light under the control of the first driving signal em [ n ].

The first reset module 144 is configured to receive a second driving signal scan [ n-1] and transmit a reference signal VI to the compensation module 146 under the control of the second driving signal scan [ n-1] to reset the compensation module 146.

The second reset module 145 is configured to receive a third driving signal scan [ n ] and transmit the reference signal VI to the light emitting device 14a under the control of the third driving signal scan [ n ] to reset the light emitting device 14a.

The compensation module 146 is configured to receive the third driving signal scan [ n ] and write the data signal data [ m ] under the control of the third driving signal scan [ n ] and perform threshold voltage compensation.

Specifically, as shown in fig. 3, the driving circuit 14b includes: a first transistor M1, a storage capacitor C1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, and a seventh transistor M7, wherein the first transistor M1 is used to determine a driving current of the driving circuit, and the light emitting device 14a is used to emit light for display in response to the driving current.

Specifically, in the present embodiment, the first transistor M1, the second transistor M2, the third transistor M3, the fourth transistor M4, the fifth transistor M5, the sixth transistor M6, and the seventh transistor M7 are all PMOS transistors. It should be noted that the transistors in the driving circuit provided in the embodiment of the present application are all PMOS transistors, so as to avoid the influence of the difference between the different types of transistors on the pixel driving circuit.

In the OLED display panel 100 of this embodiment, the first reset module 144 includes a fourth transistor M4, a control terminal of the fourth transistor M4 is connected to the second driving signal scan [ n-1], a first terminal of the fourth transistor M4 is connected to the reference signal VI, and a second terminal of the fourth transistor M4 is connected to the compensation module 146.

The second reset module 145 includes a seventh transistor M7, a control terminal of the seventh transistor M7 is connected to the third driving signal scan [ n ], a first terminal of the seventh transistor M7 is connected to the reference signal VI, and a second terminal of the seventh transistor M7 is connected to the anode of the light emitting device 14a.

The compensation module 146 includes a first transistor M1, a second transistor M2, a third transistor M3, and a storage capacitor C1, a control terminal of the first transistor M1 is respectively connected to the second terminal of the storage capacitor C1, the first terminal of the third transistor M3, and the first reset module 144, a first terminal of the first transistor M1 is respectively connected to the second terminal of the second transistor M2 and the light emission control module 147, a second terminal of the first transistor M1 is respectively connected to the second terminal of the third transistor M3 and the light emission control module 147, a first terminal of the second transistor M2 is connected to the data signal data [ M ], a control terminal of the second transistor M2 and a control terminal of the third transistor M3 are both connected to the third driving signal scan [ n ], and a first terminal of the storage capacitor C1 is connected to the light emission control module 147.

The light emitting control module 147 includes a fifth transistor M5 and a sixth transistor M6, a control terminal of the fifth transistor M5 is connected to the first driving signal em [ n ], a first terminal of the fifth transistor M5 is connected to the power signal VDD, and a second terminal of the fifth transistor M5 is connected to the first terminal of the first transistor M1; a control terminal of the sixth transistor M6 is connected to the first driving signal em [ n ], a first terminal of the sixth transistor M6 is connected to the second terminal of the first transistor M1, and a second terminal of the sixth transistor M6 is connected to the anode 141.

Further, the second transistor M2 is used to control the transmission of the data signal data [ M ]; the third transistor M3 is used for controlling the on-off of the control end and the second end of the first transistor M1; the fourth transistor M4 is used for controlling the transmission of the reference signal VI to the control terminal of the first transistor M1; the seventh transistor M7 is used for controlling the transmission of the reference signal VI to the light emitting device 14a; the fifth transistor M5 is used for controlling the power signal VDD to be transmitted to the first end of the first transistor M1; the sixth transistor M6 is used to transmit the driving current from the first transistor M1 to the light emitting device 14a.

Please refer to fig. 4. In this embodiment, the first driving signal em [ n ], the second driving signal scan [ n-1], and the third driving signal scan [ n ] are all provided from the external timing controller. As shown in fig. 4, in the OLED display panel 100 according to this embodiment, the driving timing of the OLED display panel 100 in one frame of display frame includes: a first stage T1, a second stage T2, a third stage T3 and a fourth stage T4. In the first phase T1, the control terminal of the first transistor M1 is reset. In the second phase T2, the threshold voltage of the first transistor M1 is captured and stored on the storage capacitor C1, and the light emitting device 14a is reset. In a third phase T3, the driving circuit 14b generates a driving current and supplies the driving current to the light emitting device 14a to make the light emitting device 14a emit light; in the fourth stage T4, the light emitting device 14a is reset, and the Touch electrode 11 is connected to a Touch signal to implement Touch operation.

Specifically, please refer to fig. 5A-5D. First, referring to fig. 4 and 5A, in the first phase T1, the first driving signal em [ n ] is a high level signal, the second driving signal scan [ n-1] is a low level signal, and the third driving signal scan [ n ] is a high level signal. Therefore, the fourth transistor M4 is turned on, the second transistor M2, the third transistor M3, the fifth transistor M5, the sixth transistor M6 and the seventh transistor M7 are turned off, and at this time, the reference signal VI is transmitted to the control terminal of the first transistor M1. In the first stage T1, the control terminal of the first transistor M1 is reset by the low potential of the reference signal VI.

Next, with reference to fig. 4 and 5B, in the second phase T2, the reference signal VI is a low level signal, the first driving signal em [ n ] is a high level signal, the second driving signal scan [ n-1] is a high level signal, and the third driving signal scan [ n ] is a low level signal. The second transistor M2, the third transistor M3, and the seventh transistor M7 are turned on; the fourth transistor M4, the fifth transistor M5, and the sixth transistor M6 are turned off.

The data signal data [ M ] is transmitted to the second terminal of the storage capacitor C1 through the second transistor M2, the first transistor M1 and the third transistor M3; the power supply signal VDD is transmitted to the first end of the storage capacitor C1, and the first transistor M1 is turned off when the voltage difference between the control end and the first end thereof is equal to the threshold voltage thereof; the reference signal VI is transmitted to the anode 141 of the light emitting device 14a.

Meanwhile, the anode 141 of the light emitting device 14a may be made at a lower potential by resetting the anode 141 of the light emitting device 14a by the low potential of the reference signal VI.

Then, in the third stage T3, with reference to fig. 4 and 5C, the first driving signal em [ n ] is a low level signal, the second driving signal scan [ n-1] is a high level signal, and the third driving signal scan [ n ] is a high level signal. The fifth transistor M5 and the sixth transistor M6 are turned on, and the second transistor M2, the third transistor M3, the fourth transistor M4, and the seventh transistor M7 are turned off. The power signal VDD is transmitted to the first terminal of the first transistor M1 through the fifth transistor M5, that is, the first terminal of the driving transistor DT is at the potential VDD. At this time, a driving current corresponding to the gate-source voltage of the first transistor M1 is supplied to the light emitting device 14a, causing the light emitting device 14a to emit light.

The first transistor M1 is used to determine the magnitude of the driving current, and the sixth transistor M6 transmits the driving current to the light emitting device 14a.

Finally, with reference to fig. 4 and 5D, in the fourth phase T4, the reference signal VI is a low level signal, the first driving signal em [ n ] is a high level signal, the second driving signal scan [ n-1] is a high level signal, and the third driving signal scan [ n ] is a low level signal. The second transistor M2, the third transistor M3, and the seventh transistor M7 are turned on; the fourth transistor M4, the fifth transistor M5, and the sixth transistor M6 are turned off.

In the fourth stage T4, the light emitting device 14a does not emit light, the Touch electrode 11 receives the Touch signal, and the anode 141 of the light emitting device 14a is reset by the low potential of the reference signal VI, so that the anode 141 of the light emitting device 14a is at a lower potential, and the cathode 143 of the OLED display panel 100 is prevented from receiving the Touch waveform level signal with high and low distortion, which may cause the light emitting device 14a to emit light unnecessarily. The Touch signal may be a waveform signal.

In summary, the third stage T3 is a light emitting stage of the OLED display panel 100. The fourth stage T4 is a touch stage of the OLED display panel 100.

Specifically, the OLED display panel 100 sets one or more stages of EM black insertion adjustment in the display time period of each frame of picture through the touch display driver chip under the condition of different luminances (from the lowest luminance to the highest luminance) or different gray scales (L0 to L255). By applying a touch waveform signal to the cathode 143 during an EM black insertion (Emission Duty Tuning) period, the cathode 143 is made to function as a touch electrode. That is, the display period includes the third stage T3 and the fourth stage T4, and the fourth stage T4 is the EM black insertion stage described above. The non-display period includes a first period T1 and a second period T2.

Optionally, the voltage of the Touch signal may be 0V to 3V.

In addition, in one frame of the display screen, the driving sequence includes at least one fourth stage T4 and at least two third stages T3, and the third stages T3 and the fourth stages T4 are alternately arranged. The duration of the third phase T3 is greater than the duration of the fourth phase T4.

The third stage T3 and the fourth stage T4 are alternately arranged, and the duration of the third stage T3 is longer than that of the fourth stage 4, so that the OLED display panel can perform normal display during the display period.

Optionally, the number of the fourth period T4 may be between 1 and 4, that is, the number of the EM black insertion period may be adjusted between 1 and 4, but is not limited thereto, and may be specifically adjusted according to the brightness of the actual OLED display panel.

The OLED display panel provided in the embodiments of the present application is described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the description of the embodiments is only used to help understanding the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. An OLED display panel, comprising:

a plurality of touch electrodes;

the touch control module is electrically connected with the touch routing and is used for controlling the touch electrodes; and

the pixel unit comprises a light-emitting device, and the light-emitting device comprises an anode, an organic light-emitting layer and a cathode which are arranged in sequence;

wherein the cathode serves as the touch electrode;

the pixel unit further comprises a driving circuit, wherein the driving circuit is used for driving the light-emitting device to emit light; the driving circuit comprises a first reset module, a second reset module, a compensation module and a light emitting control module;

the compensation module is used for receiving the third driving signal, writing a data signal under the control of the third driving signal and performing threshold voltage compensation;

the first reset module comprises a fourth transistor, a control end of the fourth transistor is connected to the second driving signal, a first end of the fourth transistor is connected to the reference signal, and a second end of the fourth transistor is connected to the compensation module;

the second reset module comprises a seventh transistor, a control end of the seventh transistor is connected to the third driving signal, a first end of the seventh transistor is connected to the reference signal, and a second end of the seventh transistor is connected to the anode of the light-emitting device;

the compensation module comprises a first transistor, a second transistor, a third transistor and a storage capacitor, wherein a control end of the first transistor is respectively connected with a second end of the storage capacitor, a first end of the third transistor and the first reset module, a first end of the first transistor is respectively connected with a second end of the second transistor and the light-emitting control module, a second end of the first transistor is respectively connected with a second end of the third transistor and the light-emitting control module, a first end of the second transistor is connected with the data signal, a control end of the second transistor and a control end of the third transistor are both connected with the third driving signal, and a first end of the storage capacitor is connected with the light-emitting control module;

the light-emitting control module comprises a fifth transistor and a sixth transistor, wherein the control end of the fifth transistor is connected to the first driving signal, the first end of the fifth transistor is connected to the power signal, and the second end of the fifth transistor is connected to the first end of the first transistor; a control end of the sixth transistor is connected to the first driving signal, a first end of the sixth transistor is connected with a second end of the first transistor, and a second end of the sixth transistor is connected with the anode;

the driving time sequence of the OLED display panel in one frame of display picture comprises the following steps:

a first stage of resetting a control terminal of the first transistor;

in the fourth stage, the light-emitting device is reset, and the touch electrode is accessed to a touch signal to realize touch operation;

in the fourth stage, the reference signal is a low level signal, the first driving signal is a high level signal, the second driving signal is a high level signal, the third driving signal is a low level signal, the second transistor, the third transistor and the seventh transistor are turned on, and the data signal is transmitted to the second end of the storage capacitor through the second transistor, the first transistor and the third transistor; the power supply signal is transmitted to the first end of the storage capacitor, and the first transistor is turned off when the voltage difference between the control end and the first end of the first transistor is equal to the threshold value of the first transistor; the reference signal is transmitted to an anode of the light emitting device; and the touch electrode is connected with a touch signal.

2. The OLED display panel according to claim 1, wherein in the second phase, the first driving signal is a high level signal, the second driving signal is a high level signal, the third driving signal is a low level signal, the second transistor and the third transistor are turned on, and the data signal is transmitted to the second terminal of the storage capacitor through the second transistor, the first transistor and the third transistor; the power supply signal is transmitted to the first terminal of the storage capacitor, and the first transistor is turned off when the voltage difference between the control terminal and the first terminal is equal to the threshold value.

3. The OLED display panel according to claim 1, wherein the driving timing includes at least one of the fourth stages and at least two of the third stages, the third stages and the fourth stages being alternately arranged in one frame of the display screen;