CN111816122A - Control method, control device, electronic device, and readable storage medium - Google Patents

Abstract

The application discloses a control method and device of an OLED display panel, electronic equipment and a readable storage medium. The control method comprises the following steps: controlling the first transistor to be turned on in a data writing stage so as to write a first data signal into the first node, and controlling the second transistor to be turned on so as to reset the second node through the sensing line; controlling the first transistor to be closed and controlling the second transistor to be opened in a detection stage so as to enable the potential of the induction line to be raised, and detecting a voltage signal of the induction line in a later stage of the detection stage; controlling the first transistor to be turned off and controlling the second transistor to be turned on in a reset stage so as to reset the second node through the sensing line; and controlling the first transistor to be turned on and the second transistor to be turned off in a data write-back stage to write a second data signal into the second node. And in the data write-back stage, the data write-back is carried out by adopting a 2T1C mode, so that the display effect of the OLED display panel is ensured.

Description

Control method, control device, electronic device, and readable storage medium

technical field

The present application relates to the technical field of display control, and in particular, to a control method, a control device, an electronic device and a readable storage medium for an OLED display panel.

Background technique

In the related art, the organic light emitting diode (Organic Light Emitting Display, OLED) display panel has self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, and can realize flexible display and large-area full-color display and many other advantages.

In the working process, the OLED display panel is easily affected by the uniformity and stability of the driving TFT, resulting in poor display, and due to the aging of the OLED itself, it will also cause the problem of reduced display brightness and display afterimage. Among them, the K value of the driving TFT also drifts during the use of the OLED display panel, which in turn causes the display quality of the OLED display panel to deteriorate. Therefore, during the use of the OLED display panel, the threshold voltage Vth needs to be compensated and the driving transistors need to be compensated. The intrinsic conductivity factor (K value) of the OLED display panel is detected and compensated to ensure the display quality during the use of the OLED display panel.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a control method, a control device, an electronic device, and a readable storage medium for an OLED display panel.

In the control method of the OLED display panel according to the embodiment of the present application, the OLED display panel includes a pixel driving circuit distributed in an array, and the pixel driving circuit includes a first transistor, a driving transistor, a storage capacitor, a second transistor and a light emitting diode , the first transistor is connected to the data line and the first node, the gate of the driving transistor is connected to the first node and connected to the power supply signal and the second node, and the storage capacitor is connected to the first node and the a second node, the second transistor is connected to the second node and the sensing line, the light emitting diode is connected to the second node, and the control method includes: controlling the first transistor to be turned on in a data writing stage to turn on The first data signal is written into the first node, and controls the second transistor to be turned on to reset the second node through the sensing line; in the detection stage, the first transistor is controlled to be turned off and the first transistor is controlled to be turned on. Two transistors are turned on to raise the potential of the sensing line, and the voltage signal of the sensing line is detected at the later stage of the detection stage; in the reset stage, the first transistor is turned off and the second transistor is turned on to pass the sensing line resetting the second node; and controlling the first transistor to be turned on and the second transistor to be turned off in a data write-back phase to write a second data signal to the second node.

In some embodiments, the control method includes: establishing a look-up table according to the corresponding relationship between the display brightness of the light-emitting diode and the display gray scale; and determining the second data according to the current display gray scale and the look-up table Signal.

In some embodiments, the control method includes: determining the current display gray scale according to the voltage signal.

In some embodiments, the pixel driving circuit includes a plurality of row scan lines, and each row scan line controls the first transistors in one row of the pixel driving circuits corresponding to two adjacent rows, and controls the corresponding corresponding the second transistor in another row of the pixel driving circuit in two adjacent rows, the control method includes: controlling the row scan line of the current row to output a first control signal to control the pixel driving circuit in the corresponding two adjacent rows where The first transistors of one row are turned on; and the row scan lines of the next row are controlled to output a second control signal to control the second transistors of another row of the pixel driving circuits corresponding to two adjacent rows to be turned on.

In some embodiments, each of the data lines is connected to the first transistors of the pixel driving circuits corresponding to two adjacent columns, and the row scan lines include a first scan line and a second scan line, so The first scan line is connected to one of the two adjacent columns of the pixel driving circuits corresponding to each of the data lines, and the second scan line is connected to the two adjacent columns of the pixels corresponding to each of the data lines. Another column of driving circuits, the control method includes: controlling the first scan line to output the first control signal to control the first control signal in one of the two adjacent columns of the pixel driving circuits corresponding to each of the data lines A transistor is turned on; or the second scan line is controlled to output the first control signal to control each of the data lines to turn on the first transistor of the other column of the pixel driving circuit corresponding to two adjacent columns.

In some embodiments, the second transistors of the pixel driving circuit in four columns corresponding to two adjacent data lines are connected to one of the sensing lines.

In some embodiments, the first data signal is a parameter signal, and the second data signal is a luminance fitting signal corresponding to the pixel driving circuit in the current display frame.

The control device of the embodiment of the present application is used to control an OLED display panel, the OLED display panel includes a pixel driving circuit distributed in an array, and the pixel driving circuit includes a first transistor, a driving transistor, a storage capacitor, a second transistor and a light emitting diode , the first transistor is connected to the data line and the first node, the gate of the driving transistor is connected to the first node and connected to the power supply signal and the second node, and the storage capacitor is connected to the first node and the The second node, the second transistor is connected to the second node and the sensing line, the light emitting diode is connected to the second node, and the control device includes a data writing module, a detection module, a reset module and a data write-back module , the data writing module is used to control the first transistor to be turned on in the data writing phase to write the first data signal to the first node, and to control the second transistor to be turned on to pass the sensing line pair The second node is reset; the detection module is used to control the first transistor to be turned off and the second transistor to be turned on in the detection stage to raise the potential of the sensing line, and to detect the induction in the later stage of the detection stage the voltage signal of the line; the reset module is used to control the first transistor to be turned off and the second transistor to be turned on in the reset phase to reset the second node through the sensing line; and the data write-back The module is used for controlling the first transistor to be turned on and the second transistor to be turned off in the data write-back phase to write the second data signal to the second node.

The electronic device of the embodiment of the present application includes a processor and a memory; the memory stores one or more programs; when the one or more programs are executed by the processor, the control method described in any of the foregoing embodiments is implemented .

A computer program is stored on the readable storage medium of the embodiment of the present application, and when the computer program is executed by the processor, the control method described in any of the above-mentioned embodiments is implemented.

In the control method, control device, electronic device, and readable storage medium of the OLED display panel according to the embodiments of the present application, the 3T1C driving pixel circuit structure is used to realize the real-time K value of the driving transistor in the data writing stage, the detection stage and the reset stage. Detect and reset the second node after the K value detection is completed, and control the first transistor to be turned on and the second transistor to be turned off in the data write-back stage to perform data write-back in the 2T1C method to ensure the display effect of the OLED display panel.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic flowchart of a control method according to an embodiment of the present application.

FIG. 2 is a schematic block diagram of a control device according to an embodiment of the present application.

FIG. 3 is a circuit schematic diagram of a pixel driving circuit according to an embodiment of the present application.

FIG. 4 is a schematic diagram of a control sequence of an embodiment of the present application.

FIG. 5 is a schematic flowchart of a control method according to another embodiment of the present application.

FIG. 6 is a schematic diagram of a circuit and a control signal of an OLED display panel according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a circuit and a control signal of an OLED display panel according to another embodiment of the present application.

FIG. 8 is a schematic flowchart of a control method according to another embodiment of the present application.

FIG. 9 is a schematic flowchart of a control method according to another embodiment of the present application.

Description of main component symbols:

Control device 10, data writing module 11, detection module 12, reset module 13, data write-back module 14, first determination module 15, second determination module 16, control module 17, first transistor G1, drive transistor T, storage Capacitor Cst, second transistor G2, first node g, second node s, light emitting diode L, power supply signal Vdd, data line Date, and sense line Sense.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present application, and should not be construed as a limitation on the present application.

In the description of the present application, it should be understood that the terms "first" and "second" are only used for description purposes, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to FIGS. 1 to 4 , in the control method of an OLED display panel according to an embodiment of the present application, the OLED display panel includes pixel driving circuits distributed in an array, and the pixel driving circuit includes a first transistor G1 , a driving transistor T, and a storage capacitor Cst , the second transistor G2 and the light-emitting diode L, the first transistor G1 is connected to the data line Date and the first node g, the gate of the driving transistor T is connected to the first node g and connected to the power supply signal Vdd and the second node s, and the storage capacitor Cst The first node g and the second node s are connected, the second transistor G2 is connected to the second node s and the sensing line, and the light emitting diode L is connected to the second node s. The control method includes:

Step S1, in the data writing stage, control the first transistor G1 to be turned on to write the first data signal into the first node g, and control the second transistor G2 to be turned on to reset the second node s through the sensing line;

Step S2, control the first transistor G1 to be turned off and the second transistor G2 to be turned on in the detection stage to raise the potential of the sensing line, and detect the voltage signal of the sensing line in the later stage of the detection stage;

Step S3, in the reset stage, controlling the first transistor G1 to be turned off and the second transistor G2 to be turned on to reset the second node s through the sensing line; and

Step S4, in the data write-back stage, the first transistor G1 is controlled to be turned on and the second transistor G2 is controlled to be turned off to write the second data signal into the second node s.

The control method of the embodiment of the present application may be implemented by the control device 10 of the embodiment of the present application, and the control device 10 controls the OELD display panel to display by using the control method of the embodiment of the present application. Specifically, the control device 10 includes a data writing module 11 , a detection module 12 , a reset module 13 and a data write-back module 14 . Step S1 can be implemented by the data writing module 11 , step S2 can be implemented by the detection module 12 , step S3 can be implemented by the reset module 13 , and step S4 can be implemented by the data write-back module 14 .

That is to say, the data writing module 11 can be used to control the first transistor G1 to be turned on in the data writing stage to write the first data signal into the first node g, and to control the second transistor G2 to be turned on to pass the sensing line to the first node g. The second node s is reset. The detection module 12 can be used to control the first transistor G1 to be turned off and the second transistor G2 to be turned on in the detection stage to raise the potential of the sensing line, and to detect the voltage signal of the sensing line in the later stage of the detection stage. The reset module 13 can be used to control the first transistor G1 to be turned off and the second transistor G2 to be turned on in the reset stage to reset the second node s through the sensing line. The data write-back module 14 can be used to control the first transistor G1 to be turned on and the second transistor G2 to be turned off to write the second data signal into the second node s in the data write-back stage.

In the control method and control device 10 of the OLED display panel according to the embodiment of the present application, the 3T1C driving pixel circuit structure is used to realize the real-time detection of the K value of the driving transistor T in the data writing stage, the detection stage and the reset stage, and the detection of the K value at the K value is realized. After completion, reset the second node s, and control the first transistor G1 to be turned on and the second transistor G2 to be turned off in the data write-back stage to perform data write-back in a 2T1C manner to ensure the display effect of the OLED display panel.

In the pixel driving circuit, the drain of the driving transistor T is connected to the power supply signal Vdd, the source is connected to the second node s, and the anode of the light-emitting diode L is connected to the second node s, and the light-emitting diode L can be realized by the gate-source voltage of the driving transistor T. current control, thereby controlling the brightness of the light-emitting diode L.

In step S1, after the first transistor G1 is turned on, the data line Date writes the first data signal into the first node g through the first transistor G1, and since the second transistor G2 is turned on, the sensing line is connected to the reset signal and can reset the A signal is written to the second node s through the second transistor G2 to reset the second node s.

In step S2, the first transistor G1 is turned off, and the driving transistor T is turned on under the action of the write data signal from the first node g. At this time, the sensing line is floating, and when the second transistor G2 is turned on, the sensing line is turned on. The line can achieve a potential rise with the second node s, that is, the driving transistor T linearly charges the sensing line. The latter part of the detection phase may be a period of time from a preset time before the end of the detection phase until the end of the detection phase.

In step S3, the first transistor G1 is kept off, the second transistor G2 is kept on, and the reset signal is connected to the sensing line and the reset signal can be written into the second node s through the second transistor G2 to reset the second node s .

Referring to FIG. 5, in some embodiments, the control method includes:

Step S10, establishing a look-up table according to the corresponding relationship between the display brightness of the light-emitting diode L and the display gray scale; and

Step S20, determining the second data signal according to the current display gray scale and the look-up table.

Specifically, the control device 10 may include a fitting module and a first determination module 15 , step S10 may be implemented by the fitting module, and step S20 may be implemented by the first determination module 15 . That is to say, the fitting module can be used to establish a look-up table according to the corresponding relationship between the display brightness of the light emitting diode L and the display gray scale. The first determining module 15 may be configured to determine the second data signal according to the current display gray level and the look-up table.

It is understood that since the present application controls the second transistor G2 to be turned off in the data write-back stage, the second data signal is written back to the first node g in a 2T1C manner, and the first node g drives the second data signal when writing the second data signal. The transition of the gate voltage of the transistor T is coupled to the second node s so that the voltage of the second node s changes, that is, the initial voltage of the anode of the LED L changes with the second data signal, thereby affecting the brightness control of the LED L.

Therefore, the 2T1C data is written back for the light-emitting diode L under different brightness through experimental tests, and the display gray scale is adjusted so that the display gray scale corresponds to the display brightness of the frame. In one example, if the display grayscale does not correspond to the display brightness of the frame, horizontal stripes will appear on the OLED display panel; and if the display grayscale corresponds to the display brightness of the frame, the horizontal stripes on the OLED display panel will disappear. . The display gray scale is adjusted so that the display gray scale corresponds to the display brightness of the frame, and a full gray scale look-up table is fitted through the data sampling result. Therefore, the first determination module 15 can determine the second data signal in the data write-back stage according to the look-up table.

Further, the second data signal may be a voltage signal corresponding to the current display gray level, for example, the second data signal may be X*GL+Y, where GL corresponds to the current display gray level of the pixel.

In certain embodiments, the control method includes:

Determine the current display gray scale according to the voltage signal.

Specifically, the control device 10 may include a second determination module 16, and the second determination module 16 may be configured to determine the current display gray scale according to the voltage signal.

It can be understood that the voltage signal detected in the detection stage can realize the K value detection and compensation of the driving transistor T, wherein the second determination module 16 can calculate the K value of the driving transistor T according to the voltage signal detected in the detection stage, and then obtain the K value according to the calculation The K value of the driving transistor T determines the display gray scale of the light emitting diode L, thereby ensuring the normal display of the OLED display panel.

Please refer to FIG. 6 , FIG. 7 and FIG. 8 , in some embodiments, the pixel driving circuit includes a plurality of row scan lines E, and each row scan line E controls the first transistor corresponding to one of two adjacent rows of pixel driving circuits G1, and controls the second transistor G2 corresponding to the other row of the pixel driving circuit in the adjacent two rows. The control method includes:

Step S100, controlling the row scan line E of the current row to output a first control signal to control the first transistor G1 of one row corresponding to two adjacent rows of pixel driving circuits to be turned on; and

Step S200 , controlling the row scanning line E of the next row to output a second control signal to control the second transistor G2 of the other row of the pixel driving circuit corresponding to two adjacent rows to be turned on.

Specifically, the control device 10 may include a control module 17 , and steps S100 and S200 may be implemented by the control module 17 . That is to say, the control module 17 can be used to control the row scan line E of the current row to output the first control signal to control the first transistor G1 in one row of the pixel driving circuits corresponding to two adjacent rows to be turned on, and to control the next row of pixel driving circuits to turn on the first transistor G1. The row scan line E outputs a second control signal to control the second transistor G2 of the other row of the pixel driving circuit corresponding to two adjacent rows to be turned on.

It can be understood that the first transistor G1 and the second transistor G2 of the pixel driving circuit in two adjacent rows can be controlled by the same row scan line E respectively, that is, the first transistor G1 and the second transistor in the pixel driving circuit in the adjacent two rows. G2 can realize the common connection of the gate to the same scan line, which optimizes the wiring design inside the OLED display panel. The first transistor G1 and the second transistor G2 in the pixel driving circuit of each row are respectively driven by different adjacent rows of scan lines E. At this time, using the 3T1C data write-back in which the first transistor G1 and the second transistor G2 are simultaneously turned on will cause The data written back in the current row will be simultaneously written to the pixel driving circuit of the next row.

In this way, in the control method using the 2T1C data write-back scheme, the second transistor G2 of the pixel driving circuit is turned off in the data writing-back stage, and when the pixel driving circuit of the current row is writing back the second data signal, it is avoided to write the second data signal. into the pixel drive circuit of the next row. Therefore, the control method can be used to realize the detection and compensation of the TK value of the driving transistor of the gate shared circuit structure, so as to ensure the normal display of the OLED display panel.

Please refer to FIG. 6, FIG. 7 and FIG. 9. In some embodiments, each data line Date is connected to the first transistor G1 of the pixel driving circuit corresponding to two adjacent columns, and the row scan line E includes a first scan line E1 and the second scan line E2, the first scan line E1 is connected to one of the two adjacent columns of pixel driving circuits corresponding to each data line Date, and the second scan line E2 is connected to the adjacent two columns corresponding to each data line Date Another column of the pixel drive circuit, the control method includes:

Step S300, controlling the first scan line E1 to output a first control signal to control each data line Date corresponding to two adjacent columns of pixel driving circuits in one column of the first transistor G1 to be turned on; or

Step S400 , controlling the second scan line E2 to output a first control signal to control each data line Date to turn on the first transistor G1 of the other column of the pixel driving circuit corresponding to two adjacent columns.

Specifically, steps S300 and S400 may be implemented by the control module 17 . That is to say, the control module 17 can be used to control the first scan line E1 to output the first control signal to control the first transistor G1 of one of the two adjacent columns of pixel driving circuits corresponding to each data line Date to be turned on, or used for The second scan line E2 is controlled to output a first control signal to control each data line Date to turn on the first transistor G1 of the other column of pixel driving circuits corresponding to two adjacent columns.

In this way, each data line Date is connected to the first transistor G1 of the pixel driving circuit corresponding to two adjacent columns, which can reduce the number of data lines Date. Compared with the scheme in which each column of driving pixel circuits corresponds to one data line Date, the data can be realized. The design of halving the line Date, likewise, optimizes the circuit design of the OLED display panel, and multiple pixel driving circuits can be set inside the panel to achieve high pixel density (PPI) display. At the same time, in order to avoid writing data signals into the two columns of pixel driving circuits connected to the data line Date at the same time, the two columns of pixel driving circuits connected to the data line Date can be respectively connected by the first scan line E1 and the second scan line E2. Take control.

In some embodiments, the second transistors G2 of the four-column pixel driving circuit corresponding to two adjacent data lines Date are connected to one sensing line.

It can be understood that each pixel driving circuit in each row of pixel driving circuits can independently implement data writing, voltage detection and data writing back, and four columns of pixel driving circuits share one sensing line, which is conducive to optimizing the circuit design of the OLED display panel.

6 and 7 are schematic diagrams of the circuit and control signals of the pixel driving circuit. The pixel driving circuits in the Nth and N+1th columns are connected to the data line DataN, and the N+2th and N+3th column pixel driving circuits are connected to the data line DataN. The data line DataN+1 is connected, the pixel driving circuits of the Nth and N+3th columns are connected to the first scan line E1, and the N+1th and N+2th column pixel driving circuits are connected to the second scan line E2, wherein , the first scan line E1 and the second scan line E2 of the current row are connected to the first transistor G1 of the current row and the second transistor G2 of the previous row, and the first scan line E1 and the second scan line E2 of the next row adjacent to the current row The second transistor G2 of the current row and the first transistor G1 of the next row are connected.

In the embodiment shown in FIG. 6 , for the pixel driving circuit of the Nth row and the Nth column, the control module 17 controls the first scan line E1<N> of the Nth row to output a first control signal to control the pixel driving circuit of the corresponding pixel driving circuit. A transistor G1 is turned on in a corresponding stage, and controls the first scan line E1<N+1> of row N+1 to output a second control signal to control the second transistor G2 of the corresponding pixel driving circuit to turn on in a corresponding stage.

In the embodiment shown in FIG. 7 , for the pixel driving circuit of the Nth row and the N+1th column, the control module 17 controls the second scan line E2<N> of the Nth row to output the first control signal to control the corresponding pixel driving circuit The first transistor G1 is turned on in the corresponding stage, and controls the second scan line E2<N+1> of the N+1th row to output the second control signal to control the second transistor G2 of the corresponding pixel driving circuit to turn on in the corresponding stage .

Repeating the processes in FIG. 6 and FIG. 7 can realize the corresponding control of the pixel driving circuits in the N+2 column and the N+3 column. The sensing line Sense can realize the detection of the corresponding pixel driving circuit according to the corresponding timing.

In some embodiments, the first data signal is a parameter signal, and the second data signal is a luminance fitting signal corresponding to the pixel driving circuit in the current display frame.

The first data signal is used to detect the error of the driving transistor T, for example, to detect the K value of the driving transistor T. At this time, the first data signal can be controlled according to the parameter signal determined by the experiment in advance. After the control method determines the error of the driving transistor T according to the voltage detected in the detection stage, the compensation for the driving transistor T can be realized and displayed, and the brightness fitting signal of the current display frame is set as the second data signal, which can be based on the error compensation. Realize the display of the current display frame and ensure the normal display of the OLED display panel.

The electronic device of the embodiments of the present application includes a processor and a memory; the memory stores one or more programs; when the one or more programs are executed by the processor, the control method of any of the foregoing embodiments is implemented.

In one example, a program, when executed by a processor, implements the following steps:

Step S1, in the data writing stage, control the first transistor G1 to be turned on to write the first data signal into the first node g, and control the second transistor G2 to be turned on to reset the second node s through the sensing line;

Step S2, control the first transistor G1 to be turned off and the second transistor G2 to be turned on in the detection stage to raise the potential of the sensing line, and detect the voltage signal of the sensing line in the later stage of the detection stage;

Step S3, in the reset stage, controlling the first transistor G1 to be turned off and the second transistor G2 to be turned on to reset the second node s through the sensing line; and

Step S4, in the data write-back stage, the first transistor G1 is controlled to be turned on and the second transistor G2 is controlled to be turned off to write the second data signal into the second node s.

In the electronic device of the embodiment of the present application, the processor executes the program to utilize the 3T1C drive pixel circuit structure to realize the real-time detection of the K value of the driving transistor T in the data writing stage, the detection stage and the reset stage, and after the K value detection is completed The second node s is reset, and the first transistor G1 is controlled to be turned on and the second transistor G2 is turned off in the data write-back stage to perform data write-back in a 2T1C manner to ensure the display effect of the OLED display panel.

In some embodiments, the electronic device may be a mobile phone, a tablet computer, a notebook computer, a smart bracelet, a smart watch, a personal data terminal, or other devices that can be displayed using an OLED display panel.

A computer program is stored on the readable storage medium of the embodiments of the present application, and when the computer program is executed by the processor, the control method of any of the above-mentioned embodiments is implemented.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described or exemplified is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing custom logical functions or steps of the process , and the scope of the preferred embodiments of the present application includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of the present application belong.

The logic and/or steps represented in flowcharts or otherwise described herein, for example, may be considered an ordered listing of executable instructions for implementing the logical functions, may be embodied in any computer-readable medium, For use with, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from and execute instructions from an instruction execution system, apparatus, or apparatus) or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or apparatus. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wiring (electronic devices), portable computer disk cartridges (magnetic devices), random access memory (RAM), Read Only Memory (ROM), Erasable Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, followed by editing, interpretation, or other suitable medium as necessary process to obtain the program electronically and then store it in computer memory.

It should be understood that various parts of this application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented by any one of the following techniques known in the art, or a combination thereof: discrete with logic gates for implementing logic functions on data signals Logic circuits, application specific integrated circuits with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

Those skilled in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be stored in a computer-readable storage medium. When executed, one or a combination of the steps of the method embodiment is included.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium. The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, and the like.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A control method for an OLED display panel, characterized in that the OLED display panel comprises a pixel driving circuit distributed in an array, the pixel driving circuit comprising a first transistor, a driving transistor, a storage capacitor, a second transistor and a light-emitting a diode, the first transistor is connected to the data line and the first node, the gate of the driving transistor is connected to the first node and is connected to the power signal and the second node, and the storage capacitor is connected to the first node and the second node. the second node, the second transistor is connected to the second node and the sensing line, the light emitting diode is connected to the second node, and the control method includes: In the data writing phase, controlling the first transistor to be turned on to write a first data signal into the first node, and controlling the second transistor to be turned on to reset the second node through the sensing line; In the detection phase, the first transistor is controlled to be turned off and the second transistor is controlled to be turned on to raise the potential of the sensing line, and the voltage signal of the sensing line is detected at the later stage of the detection phase; controlling the first transistor to be turned off and the second transistor to be turned on in a reset phase to reset the second node through the sense line; and In the data write-back phase, the first transistor is controlled to be turned on and the second transistor is controlled to be turned off to write the second data signal to the second node. 2. The control method according to claim 1, wherein the control method comprises: establishing a look-up table according to the corresponding relationship between the display brightness of the light-emitting diode and the display gray scale; and The second data signal is determined according to the current display gray level and the look-up table. 3. The control method according to claim 2, wherein the control method comprises: The current display gray scale is determined according to the voltage signal. 4 . The control method according to claim 1 , wherein the pixel driving circuit comprises a plurality of row scan lines, and each of the row scan lines controls all of the pixel driving circuits in one row corresponding to two adjacent rows of the pixel driving circuit. 5 . The first transistor is controlled, and the second transistor corresponding to another row of the pixel driving circuit in two adjacent rows is controlled, and the control method includes: controlling the row scan line of the current row to output a first control signal to control the first transistor of one row of the pixel driving circuits corresponding to two adjacent rows to be turned on; and The row scan line of the next row is controlled to output a second control signal to control the second transistor of another row of the pixel driving circuit corresponding to two adjacent rows to be turned on. 5 . The control method according to claim 4 , wherein each of the data lines is connected to the first transistors of the pixel driving circuits corresponding to two adjacent columns, and the row scan lines comprise first transistors. 6 . A scan line and a second scan line, the first scan line is connected to one of the two adjacent columns of the pixel driving circuits corresponding to each of the data lines, and the second scan line is connected to each of the data lines Corresponding to another column of the pixel driving circuits in two adjacent columns, the control method includes: controlling the first scan line to output the first control signal to control each of the data lines corresponding to two adjacent columns of the pixel driving circuits to turn on the first transistor in one column of the pixel driving circuit; or The second scan line is controlled to output the first control signal to control each of the data lines to turn on the first transistor of the other column of the pixel driving circuit corresponding to two adjacent columns. 6 . The control method according to claim 5 , wherein the second transistors of the pixel driving circuits in four columns corresponding to two adjacent data lines are connected to one of the sensing lines. 7 . 7 . The control method according to claim 1 , wherein the first data signal is a parameter signal, and the second data signal is a brightness fitting signal corresponding to the pixel driving circuit in a current display frame. 8 . 8. A control device for controlling an OLED display panel, wherein the OLED display panel comprises a pixel driving circuit distributed in an array, the pixel driving circuit comprising a first transistor, a driving transistor, a storage capacitor, a second A transistor and a light-emitting diode, the first transistor is connected to the data line and the first node, the gate of the driving transistor is connected to the first node and is connected to the power signal and the second node, and the storage capacitor is connected to the first node node and the second node, the second transistor is connected to the second node and the sensing line, the light emitting diode is connected to the second node, and the control device includes: A parameter data writing module, the data writing module is used for controlling the first transistor to be turned on to write a first data signal into the first node in the data writing stage, and to control the second transistor to be turned on to pass the the sensing line resets the second node; a detection module, the detection module is used to control the first transistor to be turned off and the second transistor to be turned on in the detection stage to raise the potential of the sensing line, and to detect the voltage signal of the sensing line in the later stage of the detection stage; a reset module for controlling the first transistor to be turned off and the second transistor to be turned on in a reset phase to reset the second node through the sensing line; and The data write-back module is used for controlling the first transistor to be turned on and the second transistor to be turned off to write the second data signal into the second node in the data write-back stage. 9. An electronic device, comprising: a processor and a memory; the memory stores one or more programs; When the one or more programs are executed by the processor, the control method according to any one of claims 1-7 is implemented. 10. A readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the control method according to any one of claims 1-7 is implemented.

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