Drive Circuit, Drive Method Thereof, Electronic Device, and Display Device

Abstract

The present application provides a driving circuit, a driving method thereof, an electronic device, and a display device. Among them, the driving circuit is electrically coupled to at least two pixel circuits. The pixel circuit includes a light-emitting element. At least two driving input terminals of the driving circuit respectively receive a first driving signal and a second driving signal. At least two driving output terminals of the driving circuit are connected to the input terminals of the light-emitting elements of two pixel circuits, and are configured to: according to the first driving signal and the second driving signal, select at least one of the at least two driving output terminals to provide a driving signal to the corresponding light-emitting element. The driving circuit provided by the present application can achieve that the aging current does not pass through the pixel circuit, reduce the risk of burning of the pixel circuit, reduce the burning rate during the aging of large-size products, and improve the production capacity. Moreover, the driving circuit provided by the present application can be simultaneously connected to the light-emitting elements in multiple pixel circuits, and can realize the mixed-color aging of multiple light-emitting elements without burning the circuit.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a driving circuit, a driving method thereof, an electronic device, and a display device. Background Art

[0002] With the development of AMOLED (Active-matrix organic light-emitting diode) technology, it is currently applied in large and medium-sized display screens such as folding mobile phones and in-vehicle display screens. To ensure that the product terminal can display stably, with bright colors, no afterimage, and a long lifespan, a large current needs to be loaded on the main circuit to quickly and stably stabilize the lifespan of the OLED (Organic Light-Emitting Diode) material within a short period of time, and prevent afterimages caused by too fast brightness attenuation and different attenuation rates. This process is called "L_Aging (aging)".

[0003] For large and medium-sized display screens, a large current is required during aging, and the required time is also long, posing a risk of burning. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a driving circuit, a driving method thereof, an electronic device, and a display device.

[0005] Based on the above purpose, this application provides a driving circuit electrically coupled to at least two pixel circuits. The pixel circuit includes a light-emitting element. The driving circuit includes at least two driving input terminals and at least two driving output terminals. The two driving input terminals respectively receive a first driving signal and a second driving signal. The two driving output terminals are connected to the input terminals of the light-emitting elements of the two pixel circuits. The driving circuit is configured to: according to the first driving signal and the second driving signal, select at least one of the two driving output terminals to provide a driving signal to the light-emitting element of the corresponding pixel circuit.

[0006] Optionally, the at least two pixel circuits include a first pixel circuit, a second pixel circuit, and a third pixel circuit, and the driving circuit includes a first driving input terminal, a second driving input terminal, a third driving input terminal, a first driving output terminal, a second driving output terminal, and a third driving output terminal; the first driving input terminal is configured to receive the first driving signal, the second driving input terminal is configured to receive the second driving signal, and the third driving input terminal is configured to receive a third driving signal; the first driving output terminal is connected to a first light-emitting element of the first pixel circuit, the second driving output terminal is connected to a second light-emitting element of the second pixel circuit, and the third driving output terminal is connected to a third light-emitting element of the third pixel circuit; the driving circuit is further configured to select at least one of the first driving output terminal, the second driving output terminal, or the third driving output terminal to provide a driving signal to the light-emitting element of the corresponding pixel circuit according to the first driving signal, the second driving signal, and the third driving signal.

[0007] Optionally, the driving circuit further includes at least two transistors; a first pole of each transistor serves as one of the driving output terminals; a second pole of each transistor serves as one of the driving input terminals and is cascaded with a control pole of another transistor.

[0008] Optionally, the driving circuit includes a first transistor, a second transistor, and a third transistor; a first pole of the first transistor, the second transistor, and the third transistor serves as one of the driving output terminals; a second pole of the first transistor, the second transistor, and the third transistor serves as one of the driving input terminals; a control pole of the first transistor is connected to a second pole of the third transistor, a control pole of the second transistor is connected to a second pole of the first transistor, and a control pole of the third transistor is connected to a second pole of the second transistor.

[0009] Optionally, the driving circuit further includes a driving circuit control module, the driving circuit control module is electrically coupled to the driving output terminal and an input terminal of the light-emitting element of the pixel circuit respectively, and is configured to apply the driving voltage provided by the driving circuit to the light-emitting element in response to a control signal.

[0010] Optionally, the driving circuit control module includes a control transistor; a first pole of the control transistor is connected to the input terminal of the light-emitting element of the pixel circuit, a second pole of the control transistor is connected to the driving output terminal, and a control pole of the control transistor receives the control signal.

[0011] Optionally, the pixel circuit is disposed in the display area of the display panel, and at least part of the driving circuit is disposed in the non-display area of the display panel; the driving circuit control module is disposed in the non-display area, or the driving circuit control module is disposed in the display area.

[0012] Optionally, the first light-emitting element, the second light-emitting element, and the third light-emitting element are a red light-emitting element, a green light-emitting element, and a blue light-emitting element, respectively.

[0013] Based on the same inventive concept, the present application further provides a driving method for the driving circuit, including: in a light-emitting stage, inputting a first driving signal and a second driving signal to the driving circuit to enable the driving circuit to provide the driving signal to a light-emitting element of a corresponding pixel circuit.

[0014] Optionally, the driving circuit further includes a driving circuit control module, and the driving circuit control module is electrically coupled to a driving output end of the driving circuit and an input end of the light-emitting element respectively; the method further includes: in the light-emitting stage, inputting a control signal to the driving circuit control module to apply the driving signal provided by the driving circuit to the light-emitting element.

[0015] Based on the same inventive concept, the present application further provides a driving method for the driving circuit, including: inputting the first driving signal to the first driving input end, inputting the second driving signal to the second driving input end, and inputting the third driving signal to the third driving input end, so that the driving circuit only provides the driving voltage to the first light-emitting element.

[0016] Based on the same inventive concept, the present application further provides a driving method for the driving circuit, including: inputting the first driving signal to the first driving input end, inputting the second driving signal to the second driving input end, and inputting the third driving signal to the third driving input end, so that the driving circuit only provides the driving voltage to the first light-emitting element and the second light-emitting element.

[0017] Based on the same inventive concept, the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the program, the method described in any one of the foregoing is implemented.

[0018] Based on the same inventive concept, the present application also provides a display device, including a display panel and the driving circuit described in any one of the foregoing, wherein the pixel circuit is disposed in the display area of the display panel, and at least a part of the driving circuit is disposed in the non-display area of the display panel; the driving circuit control module is disposed in the non-display area, or the driving circuit control module is disposed in the display area.

[0019] As can be seen from the above, the driving circuit provided by the present application directly applies a voltage to the input end of the light-emitting element, and the aging current does not pass through the pixel circuit, thereby reducing the risk of burning of the pixel circuit, reducing the burning rate during aging of large-size products, and improving the production capacity. Moreover, the driving circuit provided by the present application can be connected to the light-emitting elements in multiple pixel circuits at the same time, and can realize the mixed-color aging of multiple light-emitting elements without burning the circuit, reduce the aging time, and improve the aging efficiency. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the present application or related technologies, the following will briefly introduce the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Schematic structural diagram of the driving circuit and pixel circuit module for an embodiment of the present application;

[0022] Figure 2 Schematic structural diagram of the driving circuit and pixel circuit module for a specific embodiment of the present application;

[0023] Figure 3 Circuit diagram of the driving circuit and pixel circuit for an embodiment of the present application;

[0024] Figure 4 Schematic structural diagram of the driving circuit and pixel circuit module for another specific embodiment of the present application;

[0025] Figure 5 Schematic structural diagram of the display panel and driving circuit for an embodiment of the present application;

[0026] Figure 6 Schematic structural diagram of the display panel and driving circuit for a specific embodiment of the present application;

[0027] Figure 7 Schematic hardware structure diagram of an electronic device for an embodiment of the present application;

[0028] Figure 8Schematic diagram of a display panel and a driving circuit structure according to another specific embodiment of the present application. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the field to which the present application belongs. The terms "first", "second" and similar terms used in the embodiments of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] For large and medium-sized display screens, a relatively large current is required during aging, and the required time is also relatively long. Since the current flows from the first voltage terminal (for example, the VDD terminal) to the second voltage terminal (for example, the VSS terminal), the load (Loading) will increase at the place far from the IC terminal. The larger the screen, the greater the load. The horizontal trace of the VDD trace near the IC terminal and the place where the display area (AA area) is connected will be highlighted, and in severe cases, burning will occur.

[0032] In addition, in some related technologies, the aging of R / G / B (Red / Green / Blue) OLEDs is usually carried out separately, which takes a long time and the aging efficiency of the device cannot be improved. In some scenarios, if mixed-color aging (for example, the red OLED and the blue OLED are aged simultaneously) is performed, the aging time can be reduced. However, when performing mixed-color aging, for example, aging the red OLED and the blue OLED in a mixed manner, the pixel circuits of both the red OLED and the blue OLED need to be turned on. If the current value required for aging is to be achieved, the current carried by the VDD trace at the IC terminal will be relatively large, and the highlighting will be more severe, and even screen burning will occur.

[0033] In view of this, an embodiment of the present application provides a driving circuit, as Figure 1 shown, the driving circuit CD is electrically coupled to at least two pixel circuits CR, CG Figure 1Only the coupling relationship between one pixel circuit CR and the driving circuit is specifically shown. The structure and connection relationship of the other pixel circuit CG are the same as those of the pixel circuit CR. The same applies to other embodiments and drawings of the present application, which will not be elaborated herein). The pixel circuit includes a light-emitting element 70. The driving circuit includes at least two driving input terminals and at least two driving output terminals. The driving input terminals and the driving output terminals correspond to each other one by one. Two of the driving input terminals respectively receive a first driving signal DR and a second driving signal DG. Two of the driving output terminals are connected to the input terminals of the light-emitting elements of the two pixel circuits CR and CG. The driving circuit is configured to: according to the first driving signal DR and the second driving signal DG, select at least one of the two driving output terminals to provide a driving signal to the light-emitting element of the corresponding pixel circuit.

[0034] The driving circuit provided by the present application reduces the risk of burning of the pixel circuit by directly applying a voltage to the input terminal of the light-emitting element, so that the aging current does not pass through the pixel circuit, thereby reducing the burning rate during the aging of large-size products and improving the production capacity. In addition, the driving circuit provided by the present application can be connected to the light-emitting elements in multiple pixel circuits at the same time, and can realize the mixed-color aging of multiple light-emitting elements without burning the circuit, reduce the aging time, and improve the aging efficiency.

[0035] It should be noted that, for the convenience of the description of subsequent embodiments, Figure 1 the specific structure of the pixel circuit is shown, but the structure of the pixel circuit coupled to the driving circuit provided by the embodiments of the present application is not limited to Figure 1 . Other pixel circuits with different Figure 1 structures connected to the driving circuit provided by the embodiments of the present application are also within the protection scope of the present application as long as the connection relationship between the driving circuit and the light-emitting element is the same as that in the above embodiments of the present application.

[0036] In some embodiments, the driving circuit further includes at least two transistors. The first pole of each transistor serves as one of the driving output terminals, and the second pole of each transistor serves as one of the driving input terminals and is cascaded with the control pole of another transistor. Cascading means that the control pole of each transistor is only connected to the second pole of another transistor.

[0037] In the related art, if a driving voltage needs to be provided to a pixel circuit through a transistor, a control signal needs to be sent to the control electrode and a driving signal needs to be sent to the input terminal at the same time, and two signals need to be sent to two signal lines simultaneously. However, when a driving signal is input to the driving input terminal corresponding to a transistor through the transistor in the above driving circuit, a signal is also input to the control electrode of another transistor to control the conduction or cutoff of the other transistor. As long as the voltage values of the signals input to different driving input terminals are reasonably set, an aging voltage can be provided to the light-emitting element of the required pixel circuit. The specific implementation method will be further described in the subsequent method embodiments.

[0038] The transistor in the driving circuit provided in the embodiment of the present application can simultaneously implement circuit control and aging voltage application by using the driving signal, reduce the signal lines in the panel, simplify the circuit control process, and improve the efficiency.

[0039] In some embodiments, as Figure 2 shown, the at least two pixel circuits include a first pixel circuit CR, a second pixel circuit CG, and a third pixel circuit CB, and the driving circuit CD includes a first driving input terminal, a second driving input terminal, a third driving input terminal, a first driving output terminal, a second driving output terminal, and a third driving output terminal.

[0040] The first driving input terminal is configured to receive the first driving signal DR, the second driving input terminal is configured to receive the second driving signal DG, and the third driving input terminal is configured to receive a third driving signal DB.

[0041] The first driving output terminal is connected to the first light-emitting element of the first pixel circuit, the second driving output terminal is connected to the second light-emitting element of the second pixel circuit, and the third driving output terminal is connected to the third light-emitting element of the third pixel circuit (each pixel circuit in the embodiment of the present application only includes one light-emitting element, and the first light-emitting element is the light-emitting element 70 in the first pixel circuit shown, and the second light-emitting element and the third light-emitting element are the same). Figure 2 shown.

[0042] The driving circuit is further configured to select at least one of the first driving output terminal, the second driving output terminal, or the third driving output terminal to provide a driving signal to the light-emitting element of the corresponding pixel circuit according to the first driving signal, the second driving signal, and the third driving signal.

[0043] In some embodiments, the first light-emitting element, the second light-emitting element, and the third light-emitting element are a red light-emitting element, a green light-emitting element, and a blue light-emitting element, respectively. Most display panels in the prior art are composed of light-emitting elements of three colors, red, green, and blue, and their pixel circuits. By applying the driving circuit of the above embodiments of the present application, the aging of light-emitting elements of three colors, red, green, and blue, can be achieved.

[0044] Corresponding to Figure 2 the embodiment shown, in some embodiments, as Figure 3 shown, the driving circuit includes a first transistor T9, a second transistor T10, and a third transistor T11.

[0045] The first poles of the first transistor, the second transistor, and the third transistor all serve as one of the driving output terminals and are respectively connected to a first pixel circuit CR, a second pixel circuit CG, and a third pixel circuit CB.

[0046] The second poles of the first transistor, the second transistor, and the third transistor all serve as one of the driving input terminals and are respectively configured to receive a first driving signal DR, a second driving signal DG, and a third driving signal DB.

[0047] The control pole of the first transistor is connected to the second pole of the third transistor, the control pole of the second transistor is connected to the second pole of the first transistor, and the control pole of the third transistor is connected to the second pole of the second transistor.

[0048] By applying the driving circuit composed of the first, second, and third transistors provided above in the present application, as long as the voltage values of the signals input to different transistors are reasonably set, an aging voltage can be provided to the light-emitting elements of the required pixel circuits. The specific implementation method will be further described in the subsequent method embodiments.

[0049] It should be noted that the present application only provides Figure 2 the specific circuit diagrams corresponding to the embodiments, because most display panels in the related art are composed of light-emitting elements of three colors, red, green, and blue, and their pixel circuits. For the sake of easy understanding, Figure 2 Corresponding to Figure 3 the embodiment shown, the embodiments most commonly used in the specific implementation of the present application are shown, but this does not mean that other embodiments of the present application cannot be specifically implemented into circuit diagrams. For a driving circuit coupled to two or more pixel circuits, those skilled in the art can achieve the same technical effects as the driving circuit provided in the present application without creative efforts, and all are within the protection scope of the present application.

[0050] Figure 2 Corresponding to Figure 3The corresponding relationships between the various modules and devices will be further described in the parts related to the subsequent embodiments.

[0051] In some embodiments, as Figure 4 shown, the driving circuit further includes a driving circuit control module 80. The driving circuit control module 80 is electrically coupled to the driving output end and the input end of the light-emitting element of the pixel circuit respectively, and is configured to apply the driving voltage provided by the driving circuit to the light-emitting element in response to the control signal EM_N.

[0052] The driving circuit control module is configured to open the circuit between the driving circuit and the pixel circuit during the reset stage and the data writing stage of the pixel circuit, so as to prevent the voltage accidentally generated in the driving circuit from affecting the normal operation of the pixel circuit.

[0053] Figure 4 The embodiment shown in Figure 2 corresponds to the embodiment shown in Figure 4 Those skilled in the art can, without creative efforts, set the driving circuit control module in the embodiment of Figure 1 the circuit shown in the embodiment, so details will not be described again.

[0054] In some embodiments, as Figure 3 shown, the driving circuit control module includes a control transistor T8. The first pole of the control transistor is connected to the input end of the light-emitting element of the pixel circuit, the second pole of the control transistor is connected to the driving output end, the control pole of the control transistor receives the control signal, and the control transistor is configured to apply the driving voltage provided by the driving circuit to the light-emitting element in response to the control signal EM_N.

[0055] In some embodiments, as Figure 5 shown, the pixel circuit is disposed in the display area of the display panel, and at least part of the driving circuit is disposed in the non-display area of the display panel. In a specific embodiment, as Figure 6 shown, the driving circuit control module (transistor T8) is disposed in the non-display area, or, in another specific embodiment, the driving circuit control module is disposed in the display area together with the pixel circuit. In one embodiment, the non-display area is a border area, the display area is a VA area (View Area, visible area), and the display area can also be an overlapping area of the VA area and the AA area (Active Area, operable area).

[0056] The driving circuit is external, and there is no need to change the pixel circuit in the display panel, which reduces the process complexity and improves the production efficiency of the driving circuit and the display panel.

[0057] In a more specific embodiment, the driving circuit is located between the GOA area (Gate Driven on Array) in the border area of the display panel and the boundary of the AA area. The required external write driving signals DR / DG / DB are introduced from the Pad side, and the driving circuits on both sides alternately couple to each row or multiple rows of pixel circuits.

[0058] In a specific embodiment, the driving circuit is arranged on the same layer as the GOA of the display panel.

[0059] In this application, each transistor described above and below can be selected as P-type or N-type according to needs, and the corresponding effective levels can be low level and high level respectively. When the transistor is P-type, the first pole refers to the source electrode, and the second pole refers to the drain electrode. Similarly, when the transistor is N-type, the first pole refers to the drain electrode, and the second pole refers to the source electrode.

[0060] Based on the same inventive concept, this application also provides a driving method for the above driving circuit, including:

[0061] In the light-emitting stage, a first driving signal and a second driving signal are input to the driving circuit to enable the driving circuit to provide the driving signal to the light-emitting element of the corresponding pixel circuit.

[0062] In some embodiments, the driving circuit further includes a driving circuit control module, and the driving circuit control module is electrically coupled to the driving output end of the driving circuit and the input end of the light-emitting element respectively. The method further includes:

[0063] In the light-emitting stage, a control signal is input to the driving circuit control module to apply the driving signal provided by the driving circuit to the light-emitting element.

[0064] For ease of understanding, the working principle of the pixel circuit in the embodiments of this application is briefly described below in conjunction with Figure 1 (or Figure 2 ) and Figure 3 The first light-emitting control module 50 includes a first light-emitting control transistor T5, the data writing module 40 includes a data writing transistor T4, the driving module 10 includes a driving transistor T3, the compensation storage module 30 includes a compensation transistor T2 and a storage capacitor Cst, the reset module 40 includes a first reset transistor T1 and a second reset transistor T7, and the second light-emitting control module 60 includes a second light-emitting control transistor T6.

[0065] In the reset stage of the pixel circuit, the control end of T1 receives an effective signal and turns on to reset T3. T3 turns on, and other transistors receive an invalid signal and turn off.

[0066] During the data writing stage of the pixel circuit, the control terminals of T4, T3, T2, and T7 receive valid signals and turn on. T7 resets the anode voltage of the light-emitting element OLED, and the other transistors receive invalid signals and turn off. The data signal Vdata passes through T4, T3, and T2 from the first pole of T4 and is then written into T3 through the control pole of T3 and held.

[0067] During the light-emitting stage of the pixel circuit, the control terminal of T8 receives a valid signal and turns on, preparing to write the drive signal from the drive circuit into the light-emitting element. The drive input terminal of the drive circuit applies an aging voltage to the light-emitting element of the corresponding pixel circuit according to the received signal.

[0068] In specific implementation, when aging is performed using the drive circuit provided in the embodiment of the present application, the other level settings of the pixel circuit can be referred to as follows: VDD = 4.6V, VSS = -3V, Vinit = -3V, VGH = 7V, VGL = -7V, the Vth of the transistor is -2.5V, and Vdata is set correspondingly according to the requirements of the display screen.

[0069] Based on the same inventive concept, for the above drive circuit including a first drive input terminal, a second drive input terminal, a third drive input terminal, a first drive output terminal, a second drive output terminal, and a third drive output terminal, or the above drive circuit including a first transistor, a second transistor, and a third transistor, the present application also provides a specific drive method. Among them, the first transistor, the second transistor, and the third transistor are all P-type transistors, and the method includes:

[0070] Input the first drive signal DR to the first drive input terminal, input the second drive signal DG to the second drive input terminal, and input the third drive signal DB to the third drive input terminal, so that the drive circuit only provides the drive voltage to the first light-emitting element, where:

[0071] The voltage V of the third drive signal DB minus the voltage V of the first drive signal DR is less than the threshold voltage V of the first drive transistor TH1 , the voltage V of the first drive signal DR minus the voltage V of the second drive signal DG is greater than the threshold voltage V of the second drive transistor TH2 , the voltage V of the second drive signal DG minus the voltage V of the third drive signal DB is greater than the threshold voltage V of the third drive transistor TH3 .

[0072] Since the control electrode of the first transistor is connected to the second electrode of the third transistor, the control electrode of the second transistor is connected to the second electrode of the first transistor, and the control electrode of the third transistor is connected to the second electrode of the second transistor, when the voltages of the first, second, and third driving signals satisfy the above conditions, for the first transistor, the gate (i.e., the control electrode, the same below) voltage Vg = V DB , the source (i.e., the second electrode, the same below) voltage Vs = V DR , and V DB - V DR < V TH1 , so the gate-source voltage Vgs of the first transistor < V TH1 , the first transistor is turned on, and the driving circuit provides the driving voltage V DR to the first light-emitting element; for the second transistor, the gate voltage Vg = V DR , the source voltage Vs = V DG , and V DR - V DG > V TH2 , so the gate-source voltage Vgs of the second transistor > V TH2 , the second transistor is turned off, and the driving circuit does not provide the driving voltage to the second light-emitting element; for the third transistor, the gate voltage Vg = V DG , the source voltage Vs = V DB , and V DG - V DB > V TH3 , so the gate-source voltage Vgs of the third transistor > V TH3 , the third transistor is turned off, and the driving circuit does not provide the driving voltage to the third light-emitting element.

[0073] In a specific embodiment, the threshold voltages of the first transistor, the second transistor, and the third transistor are the same, all being -2.5V. On this basis, the present application embodiment provides the reference voltage ranges of the first, second, and third driving signals for enabling the driving circuit to only provide the driving voltage to the first light-emitting element: Vth = -2.5V, V DR = 2.5V to 8V, V DG = V DB = 0 to 5.5V and V DB - V DR < -2.5V.

[0074] During specific implementation, for the specific embodiments of only providing the driving voltage to the second light-emitting element and only providing the driving voltage to the third light-emitting element, the above process can be referred to, or the light-emitting element that needs to be aged alone can be used as the first light-emitting element above and the parameters can be brought in. Details are not described herein again.

[0075] In some other embodiments, for the first, second, and third N-type transistors, the driving method includes:

[0076] Inputting the first driving signal to the first driving input terminal, inputting the second driving signal to the second driving input terminal, and inputting the third driving signal to the third driving input terminal, so that the driving circuit only provides the driving voltage to the first light-emitting element, where:

[0077] The voltage of the third driving signal minus the voltage of the first driving signal is greater than the threshold voltage of the first driving transistor, the voltage of the first driving signal minus the voltage of the second driving signal is less than the threshold voltage of the second driving transistor, and the voltage of the second driving signal minus the voltage of the third driving signal is less than the threshold voltage of the third driving transistor.

[0078] Those skilled in the art can make corresponding adjustments to the above embodiments of the P-type first, second, and third transistors and apply them to the N-type first, second, and third transistors without any creative labor, so no further elaboration will be provided here.

[0079] The above is the driving method and the setting of the driving signal voltage when the monochromatic light-emitting element ages. For different products with different required currents, the target current value requirement of the light-emitting element can be achieved by adjusting the voltage difference between Vdata and VSS of the pixel circuit.

[0080] Based on the same inventive concept, for the above driving circuit including the first driving input terminal, the second driving input terminal, the third driving input terminal, the first driving output terminal, the second driving output terminal, and the third driving output terminal, or the above driving circuit including the first transistor, the second transistor, and the third transistor, the present application also provides a specific driving method. Among them, the first transistor, the second transistor, and the third transistor are all P-type transistors, and the method includes:

[0081] Inputting the first driving signal DR to the first driving input terminal, inputting the second driving signal DG to the second driving input terminal, and inputting the third driving signal DB to the third driving input terminal, so that the driving circuit only provides the driving voltage to the first light-emitting element and the second light-emitting element, where:

[0082] The voltage V of the third driving signal DB minus the voltage V of the first driving signal DR is less than the threshold voltage V of the first driving transistor TH1 , the voltage V of the first driving signal DR minus the voltage V of the second driving signalDG less than the threshold voltage V of the second driving transistor TH2 , the voltage V of the second driving signal DG minus the voltage V of the third driving signal DB is greater than the threshold voltage V of the third driving transistor TH3 .

[0083] Since the control electrode of the first transistor is connected to the second electrode of the third transistor, the control electrode of the second transistor is connected to the second electrode of the first transistor, and the control electrode of the third transistor is connected to the second electrode of the second transistor. When the voltages of the first, second, and third driving signals satisfy the above conditions, for the first transistor, the gate (i.e., the control electrode, the same below) voltage Vg = V DB , the source (i.e., the second electrode, the same below) voltage Vs = V DR , and also V DB - V DR < V TH1 , so the gate-source voltage Vgs of the first transistor < V TH1 , the first transistor is turned on, and the driving circuit provides the driving voltage V to the first light-emitting element DR ; for the second transistor, the gate voltage Vg = V DR , the source voltage Vs = V DG , and also V DR - V DG < V TH2 , so the gate-source voltage Vgs of the second transistor < V TH2 , the second transistor is turned on, and the driving circuit provides the driving voltage V to the second light-emitting element DG ; for the third transistor, the gate voltage Vg = V DG , the source voltage Vs = V DB , and also V DG - V DB > V TH3 , so the gate-source voltage Vgs of the third transistor > V TH3 , the third transistor is turned off, and the driving circuit does not provide the driving voltage to the third light-emitting element.

[0084] In a specific embodiment, the threshold voltages of the first transistor, the second transistor, and the third transistor are the same, all being -2.5V. On this basis, the embodiments of the present application provide the reference voltage ranges of the first, second, and third driving signals for enabling the driving circuit to only provide the driving voltage to the first light-emitting element: Vth = -2.5V, V DR = 2.5V to 5.5V, V DG = 5V to 8V, V DB = 0 to 3V and VDB -V DR <-2.5V, V DR -V DG <-2.5V.

[0085] In specific implementation, for the specific embodiment that only provides the driving voltage to the other two light-emitting elements, the above process can be referred to, or the two light-emitting elements that need to be co-aged can be used as the first light-emitting element and the second light-emitting element above and brought into the parameters, which will not be elaborated here.

[0086] It should be noted that due to the different material attenuation rates of light-emitting elements of different colors, and in addition, if the light-emitting elements of three colors are aged simultaneously, it will result in white light display and it will be impossible to know the aging degree and effect. Therefore, the method provided in the above embodiments of the present application is needed to age two of the three light-emitting elements simultaneously to improve the aging efficiency.

[0087] In some other embodiments, for the N-type first transistor, second transistor, and third transistor, the driving method includes:

[0088] Input the first driving signal to the first driving input terminal, input the second driving signal to the second driving input terminal, and input the third driving signal to the third driving input terminal, so that the driving circuit only provides the driving voltage to the first light-emitting element and the second light-emitting element, where:

[0089] The voltage of the third driving signal minus the voltage of the first driving signal is greater than the threshold voltage of the first driving transistor, the voltage of the first driving signal minus the voltage of the second driving signal is greater than the threshold voltage of the second driving transistor, and the voltage of the second driving signal minus the voltage of the third driving signal is less than the threshold voltage of the third driving transistor.

[0090] Those skilled in the art can make corresponding adjustments to the above embodiments of the P-type first transistor, second transistor, and third transistor so that they can be applied to the N-type first transistor, second transistor, and third transistor without any creative labor, and will not be elaborated here too much.

[0091] The above are the driving method and driving signal voltage setting during the aging of the color mixing light-emitting element. Since different products have different required currents, the target current value requirement of the light-emitting element can be achieved by adjusting the voltage difference between Vdata and VSS of the pixel circuit. Moreover, since the attenuation rates of R / G / B OLED materials are inconsistent, when setting the time parameter for color mixing aging, the time parameter can be set according to the material with a faster attenuation rate. For example, when mixing RG OLEDs, since the attenuation rate of G OLED is greater than that of R OLED, the time parameter can be set according to the attenuation rate of the G OLED material.

[0092] It should be noted that the method of the embodiment of the present application can be executed by a single device, such as a computer or a server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In this case of a distributed scenario, one of the multiple devices can only execute one or more steps of the method of the embodiment of the present application, and these multiple devices will interact with each other to complete the described method.

[0093] It should be noted that some embodiments of the present application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be executed in a different order than in the above embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the specific order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0094] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the driving method described in any of the above embodiments.

[0095] Figure 7 Figure 13 shows a more specific schematic diagram of the hardware structure of the electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. Among them, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other inside the device through the bus 1050.

[0096] The processor 1010 can be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0097] The memory 1020 can be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, etc. The memory 1020 can store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0098] The input / output interface 1030 is used to connect to the input / output module to achieve information input and output. The input / output module can be configured as a component in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Among them, the input device can include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device can include a display, a speaker, a vibrator, an indicator light, etc.

[0099] The communication interface 1040 is used to connect to a communication module (not shown in the figure) to achieve communication and interaction between this device and other devices. Among them, the communication module can achieve communication through a wired method (such as USB, network cable, etc.) or through a wireless method (such as a mobile network, WIFI, Bluetooth, etc.).

[0100] The bus 1050 includes a path for transmitting information between various components of the device (such as the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0101] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in the specific implementation process, this device may also include other components necessary for normal operation. In addition, those skilled in the art can understand that the above device may also only include the components necessary to implement the solution of the embodiments of this specification and do not necessarily include all the components shown in the figure.

[0102] The electronic device of the above embodiment is used to implement the corresponding driving method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be elaborated here.

[0103] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application further provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the driving method described in any of the foregoing embodiments.

[0104] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0105] The computer instructions stored in the storage medium of the above embodiment are used to cause the computer to execute the driving method described in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiment, which will not be elaborated here.

[0106] Based on the same inventive concept, corresponding to the driving circuit in any of the above embodiments, the present application further provides a display device including a display panel and the driving circuit described in any one of the above embodiments. The display panel includes a plurality of pixel circuits arranged in an array, the pixel circuits are disposed in the display area of the display panel, and at least a part of the driving circuit is disposed in the non-display area of the display panel; the driving circuit control module is disposed in the non-display area, or the driving circuit control module is disposed in the display area. The driving circuit in the display device provided by the present application reduces the risk of burning of the pixel circuit and the burning rate during aging of large-size products and improves production capacity by directly applying a voltage to the input end of the light-emitting element and not passing the aging current through the pixel circuit. In addition, the driving circuit in the display device provided by the present application can be connected to the light-emitting elements in a plurality of pixel circuits at the same time, and can realize the mixed-color aging of a plurality of light-emitting elements without burning the circuit, reduce the aging time, and improve the aging efficiency.

[0107] The multiple pixel units are arranged in multiple rows. In each row of pixel units, the same signal lines of each pixel circuit are connected and the same signal is provided. The embodiments of the present disclosure do not limit this. In addition, in the same pixel row, two pixel circuits in adjacent columns can be arranged in a mirror image to facilitate wiring.

[0108] In some embodiments, as Figure 5 shown, the driving circuit is coupled to multiple pixel circuits in the same row in the display panel.

[0109] In a specific embodiment, as Figure 8 shown, the driving circuit is also coupled to multiple pixel circuits in different rows in the display panel.

[0110] The number of rows controlled by each group of driving circuits and the number of pixel circuits in a row controlled depends on the size of the display panel. For example, for a 17-inch product, since the required current is relatively large, a group of driving circuits can be used to control the pixel circuits in one row of the display area; for a 9-inch product, the required current is moderate, and a group of driving circuits can be used to control the pixel circuits in two rows of the display area.

[0111] In some embodiments, the display device is an organic light-emitting diode display device.

[0112] The display device provided in this embodiment can be applied to any product or component with a display function, such as an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc.

[0113] The display device in the above embodiments includes the corresponding driving circuit in any of the foregoing embodiments and has the beneficial effects of the corresponding embodiments, which will not be elaborated here.

[0114] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.

[0115] In addition, for simplicity of explanation and discussion, and in order not to make the embodiments of the present application difficult to understand, well-known power / ground connections of integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Further, the devices may be shown in block diagram form in order to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (i.e., these details should be entirely within the understanding of those skilled in the art). In cases where specific details (such as circuits) are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application may be practiced without these specific details or with variations of these specific details. Accordingly, these descriptions should be considered illustrative rather than restrictive.

[0116] Although the present application has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (such as dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0117] Embodiments of the present application are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A driving circuit is electrically coupled to at least two pixel circuits, the pixel circuits including light-emitting elements, the driving circuit including at least two driving input terminals and at least two driving output terminals, two of the driving input terminals respectively receiving a first driving signal and a second driving signal, two of the driving output terminals being connected to input terminals of the light-emitting elements of two of the pixel circuits, the driving circuit being configured to: according to the first driving signal and the second driving signal, select at least one of the two driving output terminals to provide a driving signal to the light-emitting element of the corresponding pixel circuit; The driving circuit includes at least two transistors; The first pole of each of the transistors serves as one of the driving output terminals; The second pole of each of the transistors serves as one of the driving input terminals and is cascaded with the control pole of another one of the transistors.

2. The driving circuit according to claim 1, wherein, The at least two pixel circuits include a first pixel circuit, a second pixel circuit, and a third pixel circuit, and the driving circuit includes a first driving input terminal, a second driving input terminal, a third driving input terminal, a first driving output terminal, a second driving output terminal, and a third driving output terminal; The first driving input terminal is configured to receive the first driving signal, the second driving input terminal is configured to receive the second driving signal, and the third driving input terminal is configured to receive a third driving signal; The first driving output terminal is connected to the first light-emitting element of the first pixel circuit, the second driving output terminal is connected to the second light-emitting element of the second pixel circuit, and the third driving output terminal is connected to the third light-emitting element of the third pixel circuit; The driving circuit is further configured to select at least one of the first driving output terminal, the second driving output terminal, or the third driving output terminal to provide a driving signal to the light-emitting element of the corresponding pixel circuit according to the first driving signal, the second driving signal, and the third driving signal.

3. The driving circuit according to claim 2, wherein, The driving circuit includes a first transistor, a second transistor, and a third transistor; The first poles of the first transistor, the second transistor, and the third transistor all serve as one of the driving output terminals; The second poles of the first transistor, the second transistor, and the third transistor all serve as one of the driving input terminals; The control pole of the first transistor is connected to the second pole of the third transistor, the control pole of the second transistor is connected to the second pole of the first transistor, and the control pole of the third transistor is connected to the second pole of the second transistor.

4. The driving circuit according to claim 1, wherein, The driving circuit further includes a driving circuit control module, and the driving circuit control module is electrically coupled to the driving output terminal and the input terminal of the light-emitting element of the pixel circuit respectively, and is configured to apply the driving voltage provided by the driving circuit to the light-emitting element in response to a control signal.

5. The driving circuit according to claim 4, wherein, The driving circuit control module includes a control transistor; The first pole of the control transistor is connected to the input terminal of the light-emitting element of the pixel circuit, the second pole of the control transistor is connected to the driving output terminal, and the control pole of the control transistor receives the control signal.

6. The driving circuit according to claim 4, wherein, The pixel circuit is disposed in the display area of the display panel, and at least a part of the driving circuit is disposed in the non-display area of the display panel; The driving circuit control module is disposed in the non-display area, or the driving circuit control module is disposed in the display area.

7. The driving circuit according to claim 2, wherein, The first light-emitting element, the second light-emitting element, and the third light-emitting element are a red light-emitting element, a green light-emitting element, and a blue light-emitting element respectively.

8. A driving method for the driving circuit according to any one of claims 1 to 7, including: In the light-emitting stage, a first driving signal and a second driving signal are input to the driving circuit so that the driving circuit provides the driving signal to the light-emitting element of the corresponding pixel circuit.

9. The method according to claim 8, wherein, The driving circuit further includes a driving circuit control module, and the driving circuit control module is electrically coupled to the driving output end of the driving circuit and the input end of the light-emitting element respectively; The method further includes: In the light-emitting stage, a control signal is input to the driving circuit control module to apply the driving signal provided by the driving circuit to the light-emitting element.

10. A driving method for the driving circuit according to claim 2 or 3, including: Input the first driving signal to the first driving input end, input the second driving signal to the second driving input end, and input the third driving signal to the third driving input end, so that the driving circuit only provides a driving voltage to the first light-emitting element.

11. A driving method for the driving circuit according to claim 2 or 3, comprising: Input the first driving signal to the first driving input end, input the second driving signal to the second driving input end, and input the third driving signal to the third driving input end, so that the driving circuit only provides a driving voltage to the first light-emitting element and the second light-emitting element.

12. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein When the processor executes the program, the method described in any one of claims 8 to 11 is implemented.

13. A display device, comprising a display panel and the driving circuit according to any one of claims 1 to 7, wherein The pixel circuit is disposed in the display area of the display panel, and at least a part of the driving circuit is disposed in the non-display area of the display panel; The driving circuit control module is disposed in the non-display area, or the driving circuit control module is disposed in the display area.

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