Display panel and display module

Abstract

The application provides a display panel and a display module. The display panel comprises a first power line and a voltage reset line; an organic light-emitting device, a first electrode of the organic light-emitting device being electrically connected with the first power line; a pixel driving circuit, the pixel driving circuit being electrically connected with a second electrode of the organic light-emitting device, the pixel driving circuit being used for driving the organic light-emitting device to emit light, the pixel driving circuit being electrically connected with the voltage reset line; and a water ripple adjusting circuit, the water ripple adjusting circuit being electrically connected with the first power line and the voltage reset line respectively, the water ripple adjusting circuit being used for receiving a predetermined voltage, and outputting a transmission voltage of the first power line to the voltage reset line after superimposing the transmission voltage and the predetermined voltage, the predetermined voltage being a difference between a reset voltage of the pixel driving circuit and a direct current component of the transmission voltage. The application alleviates the display water ripple problem of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular, to a display panel and a display module. Background Art

[0002] With the development of display technology, organic light-emitting diode (OLED) displays have been widely used in display, lighting, smart wearable and other fields due to their advantages such as self-luminescence, wide viewing angle, wide color gamut, fast response speed and high luminous efficiency.

[0003] Currently, in the actual application of OLED screens and complete machines, the power supply design or other reasons may interfere with the internal display signal of the OLED screen, eventually causing the screen brightness to fluctuate and the appearance of rolling light and dark water ripples, thereby affecting the display effect of the display. Summary of the Invention

[0004] The main purpose of the present application is to provide a display panel and a display module to at least solve the problem of water ripples on display screens in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present application, a display panel is provided, comprising:

[0006] a first power supply line and a voltage reset line;

[0007] an organic light-emitting device, wherein a first electrode of the organic light-emitting device is electrically connected to the first power line;

[0008] a pixel driving circuit, electrically connected to the second electrode of the organic light-emitting device, the pixel driving circuit being used to drive the organic light-emitting device to emit light, the pixel driving circuit being electrically connected to the voltage reset line;

[0009] A water ripple adjustment circuit is electrically connected to the first power line and the voltage reset line respectively. The water ripple adjustment circuit is used to receive a predetermined voltage and superimpose the transmission voltage of the first power line with the predetermined voltage and output it to the voltage reset line. The predetermined voltage is the difference between the reset voltage of the pixel driving circuit and the DC component of the transmission voltage of the first power line.

[0010] According to another aspect of the present application, a display module is provided, comprising: any one of the display panels described above.

[0011] According to the technical solution of the present application, a first electrode of an organic light-emitting device is electrically connected to a first power line, and a ripple adjustment circuit is electrically connected to the first power line. The ripple adjustment circuit is also electrically connected to a second electrode of the organic light-emitting device via a voltage reset line, a pixel driving circuit, and a voltage reset line. The ripple adjustment circuit receives a transmission voltage and a DC component of the transmission voltage from the first power line according to the first power line, subtracts the reset voltage from the DC component, and then superimposes the difference with the transmission voltage to obtain a sum of the reset voltage and the ripple voltage. The summed voltage is then provided to the organic light-emitting device via the voltage reset line and the pixel driving circuit to reset the voltage of the organic light-emitting device. This achieves the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, thereby ensuring that the voltage difference between the voltage reset line and the first power line remains unchanged. This solves the problem of display ripples caused by changes in brightness of the organic light-emitting device due to fluctuations in the voltage difference between the voltage reset line and the first power line, thereby optimizing the ripples and ensuring a good display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0013] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application is shown;

[0014] Figure 2 A schematic structural diagram of a water ripple adjustment circuit provided according to an embodiment of the present application is shown;

[0015] Figure 3 FIG2 shows a schematic structural diagram of a ripple sampling circuit provided according to an embodiment of the present application;

[0016] Figure 4 FIG2 shows a schematic structural diagram of another ripple sampling circuit provided according to an embodiment of the present application;

[0017] Figure 5 FIG2 shows a structural diagram of another ripple sampling circuit provided according to an embodiment of the present application;

[0018] Figure 6 A schematic structural diagram of another water ripple adjustment circuit provided according to an embodiment of the present application is shown;

[0019] Figure 7 A structural schematic diagram of a display module provided according to an embodiment of the present application is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. First power line; 11. Voltage reset line; 12. Organic light-emitting device; 13. Pixel driving circuit; 14. Water ripple adjustment circuit; 15. Second power line; 16. Ripple sampling circuit; 17. Ripple coupling circuit; 18. Third power line; 19. Analog subtractor; 20. AC coupling circuit; 21. Analog-to-digital converter; 22. Two's complement adder; 23. Digital-to-analog converter; 24. Fourth power line; 25. Second analog adder; 26. Switch tube; 27. Display module. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] As introduced in the background technology, the display panel in the prior art has the problem of displaying water ripples. To solve the above technical problem, the embodiments of the present application provide a display panel and a display module.

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] In this embodiment, a display panel is provided. Figure 1 Schematic diagram of the structure of the display panel according to the embodiment of the present application. Figure 1 As shown, the display panel of the present application includes:

[0028] A first power line 10 and a voltage reset line 11;

[0029] Specifically, the first power line and the voltage reset line are respectively used for transmitting voltage, and the transmission voltage of the first power line is composed of a ripple component (also called ripple voltage) and a DC component.

[0030] an organic light-emitting device 12, wherein a first electrode of the organic light-emitting device 12 is electrically connected to the first power line 10;

[0031] Specifically, the first electrode may be the cathode of the organic light-emitting device, and the first power line may provide a cathode voltage for the organic light-emitting device in the display panel.

[0032] a pixel driving circuit 13 electrically connected to the second electrode of the organic light-emitting device 12 , the pixel driving circuit 13 being used to drive the organic light-emitting device to emit light, and the pixel driving circuit 13 being electrically connected to the voltage reset line 11;

[0033] Specifically, the second electrode may be the anode of the organic light-emitting device. The pixel driving circuit has an input electrically connected to the voltage reset line, and an output electrically connected to the anode of the organic light-emitting device. The voltage reset line may provide a reset voltage to the anode of the organic light-emitting element via the pixel driving circuit, thereby resetting the anode voltage of the organic light-emitting element.

[0034] The water ripple adjustment circuit 14 is electrically connected to the first power line 10 and the voltage reset line 11 respectively. The water ripple adjustment circuit 14 is used to receive a predetermined voltage and output the superimposed transmission voltage PVEE of the first power line 10 and the predetermined voltage to the voltage reset line 11. The predetermined voltage is the difference between the reset voltage Vref2 of the pixel driving circuit and the DC component of the transmission voltage PVEE of the first power line.

[0035] Specifically, the input end of the water ripple adjustment circuit is electrically connected to the first power line, and receives its transmission voltage and its DC share via the first power line. The output end of the water ripple adjustment circuit is electrically connected to the voltage reset line, and outputs the superimposed voltage to the voltage reset line. Because the transmission voltage of the first power line is equal to the sum of the DC component and the ripple voltage, the superimposed voltage value of the water ripple adjustment circuit is actually the sum of the reset voltage and the ripple voltage.

[0036] According to the above embodiment, the first electrode of the organic light-emitting device is electrically connected to the first power line, and the ripple adjustment circuit is electrically connected to the first power line. The ripple adjustment circuit is also electrically connected to the second electrode of the organic light-emitting device via the voltage reset line, the pixel driving circuit, and the transmission voltage of the first power line. The ripple adjustment circuit receives the transmission voltage and the DC component of the transmission voltage from the first power line, calculates the difference between the reset voltage and the DC component, and then superimposes the difference with the transmission voltage to obtain the sum of the reset voltage and the ripple voltage. The superimposed voltage is provided to the organic light-emitting device via the voltage reset line and the pixel driving circuit to reset the voltage of the organic light-emitting device. This achieves the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, thereby ensuring that the voltage difference between the voltage reset line and the first power line remains unchanged. This solves the problem of ripples in the display caused by changes in the brightness of the organic light-emitting device due to fluctuations in the voltage difference between the voltage reset line and the first power line. This achieves the effect of optimizing the ripples and ensures a good display effect of the display panel.

[0037] The water ripple adjustment circuit is located in at least one of the following: a driver chip or a flexible circuit board. In other words, the water ripple adjustment circuit can be integrated into the driver chip of the display panel, or integrated into the flexible circuit board of the display panel, or partially integrated into the driver chip and partially integrated into the flexible circuit board.

[0038] Specifically, the operating phase of the pixel driving circuit includes a light-emitting phase. During the light-emitting phase, the pixel driving circuit is configured to output a light-emitting driving current to drive the organic light-emitting device to emit light. The current intensity of the light-emitting driving current can affect the light-emitting intensity of the organic light-emitting device. Generally, the lower the current intensity of the light-emitting driving current received by the organic light-emitting device, the lower the light-emitting intensity of the organic light-emitting device.

[0039] In addition, the organic light emitting device may be an organic light emitting diode, a micro light emitting diode, a sub-millimeter light emitting diode or other organic light emitting components.

[0040] In one option, Figure 2 As shown, the water ripple adjustment circuit 14 includes:

[0041] A second power line 15 is used to transmit the reset voltage;

[0042] Specifically, the second power line may be electrically connected to a driving circuit of the display panel, and the driving circuit provides the reset voltage to the second power line.

[0043] a ripple sampling circuit 16 , wherein an input terminal of the ripple sampling circuit 16 is electrically connected to the first power line 10 , and the ripple sampling circuit 16 is configured to sample and output the ripple voltage of the first power line 10 ;

[0044] Specifically, the ripple sampling circuit may be any suitable circuit structure for sampling ripples in voltage.

[0045] The ripple coupling circuit 17 includes a first input terminal, a second input terminal and an output terminal. The first input terminal of the ripple coupling circuit 17 is electrically connected to the output terminal of the ripple sampling circuit 16, the second input terminal of the ripple coupling circuit 17 is electrically connected to the second power line 15, and the output terminal of the ripple coupling circuit 17 is electrically connected to the voltage reset line 11. The ripple coupling circuit 17 is used to superimpose the ripple voltage and the reset voltage and output them.

[0046] Specifically, the second input terminal of the ripple coupling circuit receives the reset voltage via the second power line. The output terminal of the ripple coupling circuit is the output terminal of the water ripple adjustment circuit. The ripple coupling circuit can be any suitable circuit structure that superimposes two input voltages.

[0047] In the water ripple adjustment circuit of the above embodiment, the input end of the ripple sampling circuit is electrically connected to the first power line, the input end of the ripple coupling circuit is electrically connected to the second power line and the ripple sampling circuit respectively, and the output end of the ripple coupling circuit is electrically connected to the voltage reset line as the output end of the water ripple adjustment circuit. The ripple voltage in the transmission voltage of the first power line is sampled by the ripple sampling circuit, and then transmitted to the ripple coupling circuit, so that the ripple coupling circuit superimposes the received ripple voltage and the reset voltage and outputs them to the anode of the organic light-emitting device, further achieving the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, further alleviating the problem of water ripples in the display caused by the ripple voltage fluctuation in the negative electrode voltage, and further improving the display effect of the display panel.

[0048] In some exemplary embodiments of the present application, Figure 3As shown, the ripple sampling circuit 16 may include: a third power line 18, for transmitting a first reference voltage, wherein the first reference voltage is the DC component; an analog subtractor 19, comprising a first input terminal, a second input terminal and an output terminal, wherein the first input terminal of the analog subtractor 19 is electrically connected to the first power line 10, the second input terminal of the analog subtractor 19 is electrically connected to the third power line 18, and the output terminal of the analog subtractor 19 is electrically connected to the first input terminal of the ripple coupling circuit, and the analog subtractor 19 is used to make a difference between the transmission voltage of the first power line 10 and the first reference voltage to obtain the ripple voltage and output it. The DC component of the transmission voltage of the first power line is fixed, while the ripple voltage fluctuates. Therefore, in this embodiment, the transmission voltage is input into an analog subtractor via the first power line, and the DC component of the transmission voltage of the first power line is input into a second input terminal of the analog subtractor via the third power line. The transmission voltage and its DC component are then subtracted by the analog subtractor, thereby achieving the effect of acquiring the ripple voltage from the transmission voltage, ensuring that the ripple voltage in the negative electrode voltage can be obtained relatively simply and accurately.

[0049] In other exemplary embodiments of the present application, Figure 4 As shown, the ripple sampling circuit 16 may include an AC coupling circuit 20, wherein the input end of the AC coupling circuit 20 is electrically connected to the first power line 10, and the output end of the AC coupling circuit 20 is electrically connected to the first input end of the ripple coupling circuit. The AC coupling circuit 20 is configured to perform AC coupling on the transmission voltage of the first power line 10 to remove the DC component in the transmission voltage of the first power line 10, thereby obtaining and outputting the ripple voltage. Since the ripple voltage is actually the AC component in the transmission voltage of the first power line, in this embodiment, the AC coupling circuit performs AC coupling on the transmission voltage of the first power line to remove the DC component therein, thereby obtaining the ripple voltage therein. This achieves the effect of sampling the ripple voltage from the transmission voltage, ensuring that the ripple voltage in the negative electrode voltage can be obtained relatively simply and accurately.

[0050] AC coupling, specifically through DC-blocking capacitor coupling, removes the DC component, allowing an oscilloscope or other measuring device to display only the AC component. This coupling method allows the input signal to pass through a capacitor before entering the amplifier circuit. Due to the capacitor's DC-blocking effect, the DC component in the measured signal is filtered out.

[0051] In some further exemplary embodiments of the present application, Figure 5As shown, the ripple sampling circuit 16 may include: a third power line 18 for transmitting a first reference voltage, wherein the first reference voltage is the DC component; an analog-to-digital converter 21, wherein the input terminals of the analog-to-digital converter 21 are electrically connected to the first power line 10 and the third power line 18, respectively, and the analog-to-digital converter is used to perform analog-to-digital conversion on the transmission voltage of the first power line 10 to obtain a first digital voltage, and to perform analog-to-digital conversion on the DC component to obtain a second reference voltage, that is, both the first digital voltage and the second reference voltage are digital voltages; a complement adder 22, comprising a first input terminal, a second input terminal and an output terminal, wherein the first input terminal and the complement adder 22 are connected to each other. The second input end of the code adder 22 is electrically connected to the output end of the analog-to-digital converter 21. The first input end of the complementary code adder 22 is used to receive the first digital voltage, and the second input end of the complementary code adder 22 is used to receive the second reference voltage. The complementary code adder 22 is used to subtract the first digital voltage from the second reference voltage to obtain a second digital voltage. The digital-to-analog converter 23 has an input end electrically connected to the output end of the complementary code adder 22, and an output end of the digital-to-analog converter 23 is electrically connected to the first input end of the ripple coupling circuit. The digital-to-analog converter 23 is used to convert the second digital voltage into an analog voltage to obtain and output the ripple voltage. In this embodiment, the transmission voltage and its DC component of the first power line are respectively analog-to-digital converted by the analog-to-digital converter and output to the two input ends of the complementary code adder, so that the complementary code adder can perform a subtraction operation on the converted digital voltages to obtain a digital value of the ripple voltage. The digital-to-analog converter then performs digital-to-analog conversion on the digital value of the ripple voltage, thereby achieving the effect of collecting and obtaining the ripple voltage from the transmission voltage.

[0052] It should be noted that the two's complement adder can only calculate digital quantities, so the analog voltage is first converted into a digital quantity through an analog-to-digital converter, and then converted into an analog quantity through a digital-to-analog converter after calculation by the two's complement adder.

[0053] Specifically, there can be only one analog-to-digital converter, which realizes the analog-to-digital conversion of the transmission voltage and DC component through one analog-to-digital converter; there can also be two analog-to-digital converters, which respectively convert the transmission voltage and DC component into digital quantities through two analog-to-digital converters and output them to the complement adder.

[0054] In this embodiment, Figure 2As shown, the ripple coupling circuit 17 includes a first analog adder having a first input, a second input, and an output. The first input of the first analog adder is electrically connected to the output of the ripple sampling circuit 16, the second input of the first analog adder is electrically connected to the second power line 15, and the output of the first analog adder is electrically connected to the voltage reset line 11. The first analog adder is configured to add the ripple voltage and the reset voltage and output the sum. The first analog adder superimposes the reset voltage of the anode of the organic light-emitting device and the ripple voltage in the cathode voltage, further ensuring that the voltage difference between the voltage reset line and the first power line remains constant, thereby further resolving the problem of display ripples caused by voltage difference fluctuations.

[0055] In some other embodiments, Figure 6 As shown, the water ripple adjustment circuit 14 includes:

[0056] a fourth power line 24 for transmitting the predetermined voltage;

[0057] Specifically, since the difference between the reset voltage and the DC component of the transmission voltage is fixed, the difference voltage can be provided by the power supply.

[0058] The second analog adder 25 includes a first input terminal, a second input terminal and an output terminal. The first input terminal of the second analog adder 25 is electrically connected to the first power line 10, the second input terminal of the second analog adder 25 is electrically connected to the fourth power line 24, and the output terminal of the second analog adder 25 is electrically connected to the voltage reset line 11. The second analog adder 25 is used to superimpose the transmission voltage of the first power line 10 and the predetermined voltage and output the superimposed voltage.

[0059] Specifically, the predetermined voltage and the transmission voltage are added by the second analog adder to obtain the superimposed voltage = predetermined voltage + transmission voltage = (reset voltage - DC component) + (DC component + ripple voltage) = reset voltage + ripple voltage, thereby achieving the effect of superimposing the ripple voltage on the reset voltage.

[0060] In the above embodiment, the difference voltage between the reset voltage and the DC component of the transmission voltage is directly provided through the above-mentioned fourth power line, and the difference voltage is added to the transmission voltage of the above-mentioned first power line through the second analog adder to obtain the sum of the reset voltage and the ripple voltage. The superimposed voltage is then provided to the organic light-emitting device through the above-mentioned voltage reset line and the above-mentioned pixel driving circuit to perform voltage reset on the organic light-emitting device, further achieving the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, further alleviating the problem of water ripples in the display caused by the change in brightness of the organic light-emitting device due to the fluctuation of the ripple voltage in the negative electrode voltage, thereby further improving the display effect of the display panel.

[0061] Furthermore, if Figure 1 As shown, the pixel driving circuit 13 further includes a switch transistor 26 having a first terminal, a second terminal, and a control terminal. The first terminal of the switch transistor 26 is electrically connected to the voltage reset line 11, and the second terminal of the switch transistor 26 is electrically connected to the second electrode of the organic light-emitting device 12. The control terminal of the switch transistor is configured to receive a switching signal. The superimposed voltage is transmitted to the first terminal of the switch transistor via the voltage reset line to reset the voltage at the first terminal of the switch transistor, thereby preventing image sticking on the display panel.

[0062] Specifically, the switch tube may be a MOS, a triode or other transistors.

[0063] The embodiment of the present application also provides a Figure 7 The display module 27 shown in FIG. Figure 7 As shown, the display module 27 includes: any one of the above-mentioned display panels.

[0064] In the above-mentioned display module, the first electrode of the organic light-emitting device of the display panel is electrically connected to the first power line, and the water ripple adjustment circuit is electrically connected to the first power line. The water ripple adjustment circuit is also electrically connected to the second electrode of the organic light-emitting device through the voltage reset line, the pixel driving circuit, and the second electrode of the organic light-emitting device in sequence. The above-mentioned water ripple adjustment circuit receives the transmission voltage of the above-mentioned first power line and the DC component of the transmission voltage according to the above-mentioned first power line, subtracts the reset voltage from the DC component, and then superimposes the difference with the transmission voltage to obtain the sum of the reset voltage and the ripple voltage. The superimposed voltage is provided to the organic light-emitting device through the above-mentioned voltage reset line and the above-mentioned pixel driving circuit to reset the voltage of the organic light-emitting device, thereby achieving the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, thereby ensuring that the voltage difference between the voltage reset line and the first power line remains unchanged, solving the problem of water ripples in the display caused by the brightness change of the organic light-emitting device due to the fluctuation of the voltage difference between the voltage reset line and the first power line, achieving the effect of optimizing the water ripples, and ensuring a good overall display effect of the display module.

[0065] Obviously, those skilled in the art will appreciate that the various modules or steps of the present invention described above can be implemented using a general-purpose computing device, can be centralized on a single computing device, or can be distributed across a network of multiple computing devices. They can be implemented using program code executable by the computing device, and thus, can be stored in a storage device and executed by the computing device. In some cases, the steps shown or described herein can be performed in a different order than that shown, or can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0066] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0067] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0068] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0069] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0070] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0071] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0072] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. 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 technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0073] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0074] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0075] 1) In the display panel of the present application, the first electrode of the organic light-emitting device is electrically connected to the first power line, and the water ripple adjustment circuit is electrically connected to the first power line. The water ripple adjustment circuit is also electrically connected to the second electrode of the organic light-emitting device through the voltage reset line, the pixel driving circuit, and the second electrode of the organic light-emitting device in sequence. The water ripple adjustment circuit receives the transmission voltage of the first power line and the DC component of the transmission voltage according to the first power line, subtracts the reset voltage from the DC component, and then superimposes the difference with the transmission voltage to obtain the sum of the reset voltage and the ripple voltage. The superimposed voltage is provided to the organic light-emitting device through the voltage reset line and the pixel driving circuit to reset the voltage of the organic light-emitting device, thereby achieving the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, thereby ensuring that the voltage difference between the voltage reset line and the first power line remains unchanged, solving the problem of water ripples in the display caused by changes in the brightness of the organic light-emitting device due to fluctuations in the voltage difference between the voltage reset line and the first power line, achieving the effect of optimizing the water ripples, and ensuring a good display effect of the display panel.

[0076] 2) In the display module of the present application, the first electrode of the organic light-emitting device of the display panel is electrically connected to the first power line, and the water ripple adjustment circuit is electrically connected to the first power line. The water ripple adjustment circuit is also electrically connected to the second electrode of the organic light-emitting device through the voltage reset line, the pixel driving circuit, and the second electrode of the organic light-emitting device in sequence. The water ripple adjustment circuit receives the transmission voltage of the first power line and the DC component of the transmission voltage according to the first power line, subtracts the reset voltage from the DC component, and then superimposes the difference with the transmission voltage to obtain the sum of the reset voltage and the ripple voltage. The superimposed voltage is provided to the organic light-emitting device through the voltage reset line and the pixel driving circuit to reset the voltage of the organic light-emitting device, thereby achieving the effect of adding the ripple voltage in the negative electrode voltage to the reset voltage of the anode of the organic light-emitting device, thereby ensuring that the voltage difference between the voltage reset line and the first power line remains unchanged, solving the problem of water ripples caused by changes in the brightness of the organic light-emitting device due to fluctuations in the voltage difference between the voltage reset line and the first power line, achieving the effect of optimizing the water ripples and ensuring a good overall display effect of the display module.

[0077] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: a first power supply line and a voltage reset line; an organic light-emitting device, wherein a first electrode of the organic light-emitting device is electrically connected to the first power line; a pixel driving circuit, electrically connected to the second electrode of the organic light-emitting device, the pixel driving circuit being used to drive the organic light-emitting device to emit light, the pixel driving circuit being electrically connected to the voltage reset line; A water ripple adjustment circuit is electrically connected to the first power line and the voltage reset line respectively. The water ripple adjustment circuit is used to receive a predetermined voltage and superimpose the transmission voltage of the first power line with the predetermined voltage and output it to the voltage reset line. The predetermined voltage is the difference between the reset voltage of the pixel driving circuit and the DC component of the transmission voltage of the first power line.

2. The display panel according to claim 1, wherein: The water ripple adjustment circuit includes: a second power line, configured to transmit the reset voltage; a ripple sampling circuit, wherein an input end of the ripple sampling circuit is electrically connected to the first power line, and the ripple sampling circuit is used to sample and output the ripple voltage of the first power line; A ripple coupling circuit includes a first input terminal, a second input terminal, and an output terminal. The first input terminal of the ripple coupling circuit is electrically connected to the output terminal of the ripple sampling circuit, the second input terminal of the ripple coupling circuit is electrically connected to the second power line, and the output terminal of the ripple coupling circuit is electrically connected to the voltage reset line. The ripple coupling circuit is used to superimpose the ripple voltage and the reset voltage and output them.

3. The display panel according to claim 2, wherein: The ripple sampling circuit comprises: a third power line, configured to transmit a first reference voltage, wherein the first reference voltage is the DC component; An analog subtractor includes a first input terminal, a second input terminal, and an output terminal. The first input terminal of the analog subtractor is electrically connected to the first power line, the second input terminal of the analog subtractor is electrically connected to the third power line, and the output terminal of the analog subtractor is electrically connected to the first input terminal of the ripple coupling circuit. The analog subtractor is used to subtract the transmission voltage of the first power line from the first reference voltage to obtain the ripple voltage and output it.

4. The display panel according to claim 2, wherein: The ripple sampling circuit comprises: an AC coupling circuit, wherein an input end of the AC coupling circuit is electrically connected to the first power line, and an output end of the AC coupling circuit is electrically connected to the first input end of the ripple coupling circuit, and the AC coupling circuit is used to perform AC coupling on the transmission voltage of the first power line to remove a DC component in the transmission voltage of the first power line, thereby obtaining and outputting the ripple voltage.

5. The display panel according to claim 2, wherein: The ripple sampling circuit comprises: a third power line, configured to transmit a first reference voltage, wherein the first reference voltage is the DC component; an analog-to-digital converter, wherein input terminals of the analog-to-digital converter are electrically connected to the first power line and the third power line, respectively, and the analog-to-digital converter is configured to perform analog-to-digital conversion on the transmission voltage of the first power line to obtain a first digital voltage, and to perform analog-to-digital conversion on the DC component to obtain a second reference voltage; a two's complement adder, comprising a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal and the second input terminal of the two's complement adder are electrically connected to the output terminal of the analog-to-digital converter, respectively, and the two's complement adder is used to obtain a second digital voltage by performing a subtraction between the first digital voltage and the second reference voltage; A digital-to-analog converter, wherein the input end of the digital-to-analog converter is electrically connected to the output end of the complement adder, the output end of the digital-to-analog converter is electrically connected to the first input end of the ripple coupling circuit, and the digital-to-analog converter is used to convert the second digital voltage into an analog voltage to obtain the ripple voltage and output it.

6. The display panel according to claim 2, wherein: The ripple coupling circuit comprises: A first analog adder includes a first input terminal, a second input terminal, and an output terminal. The first input terminal of the first analog adder is electrically connected to the output terminal of the ripple sampling circuit, the second input terminal of the first analog adder is electrically connected to the second power line, and the output terminal of the first analog adder is electrically connected to the voltage reset line. The first analog adder is used to add the ripple voltage and the reset voltage and output the added value.

7. The display panel according to claim 1, wherein: The water ripple adjustment circuit includes: a fourth power line, configured to transmit the predetermined voltage; The second analog adder includes a first input terminal, a second input terminal, and an output terminal. The first input terminal of the second analog adder is electrically connected to the first power line, the second input terminal of the second analog adder is electrically connected to the fourth power line, and the output terminal of the second analog adder is electrically connected to the voltage reset line. The second analog adder is used to superimpose the transmission voltage of the first power line and the predetermined voltage and output the superimposed voltage.

8. The display panel according to any one of claims 1 to 7, wherein: The pixel driving circuit further includes: The switch tube includes a first end, a second end and a control end. The first end of the switch tube is electrically connected to the voltage reset line, the second end of the switch tube is electrically connected to the second electrode of the organic light-emitting device, and the control end of the switch tube is used to receive a switching signal.

9. The display panel according to any one of claims 1 to 7, wherein: The water ripple adjustment circuit is located in at least one of the following: a driving chip and a flexible circuit board.

10. A display module, characterized in that: include: The display panel according to any one of claims 1 to 9.

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