Display panel, method for driving a display panel, and display device.

Abstract

The present invention relates to a display panel, a method for driving a display panel, and a display device. [Solution] The display panel includes a display driver chip and a pixel circuit. The display driver chip is used to provide a source drive signal to the pixel circuit. The source drive signal includes a blackout stage for each frame of the display screen. The blackout stage includes a first adjustment stage, in which the display driver chip adjusts the source drive signal output to the pixel circuit to a target drive signal. By uniformly adjusting all source drive signals of the display panel during the blackout stage of each frame, the coupling voltage by the black insertion algorithm in all pixel circuits of the display panel is leveled, thereby achieving uniformity control of the display brightness of the display panel.

Description

Detailed Description of the Invention

[0001] (Cross - reference to Related Applications) This application claims the priority of Chinese Patent Application No. 202410658851.9, titled "Display Panel, Driving Method of Display Panel, and Display Device", filed on May 24, 2024, and all the contents of the invention are incorporated herein by reference.

Technical Field

[0002] The present invention relates to the field of display control technology, and particularly to a display panel, a driving method of the display panel, and a display device.

Background Art

[0003] In the product appearance design of a display panel, the display panel is not necessarily a regular shape. Usually, there is an arc structure on the outer shape of the display panel, which is related to the radian. For example, the four R - corners of a mobile phone screen and the U - corner in a camera can be cited. With the continuous development of display technology, when the display panel has an R - corner or U - corner structure, based on user needs, it is necessary to adopt a special algorithm for the R - corner or U - corner to improve the display effect of the panel. Generally, the related problems are solved by the R - corner black insertion algorithm. For example, the jaggy problem is compensated, and the R - corner is smoothly transitioned. Or, different R - corner radian is compensated according to user needs. Since there is a black insertion algorithm for the R - corner or U - corner and there is no algorithm processing on the straight side of the screen, there is luminance unevenness below the R - corner and the straight side.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Based on this, it is necessary to provide a display panel, a driving method of the display panel, and a display device that can eliminate display luminance unevenness for the above - mentioned technical problems.

Means for Solving the Problems

[0005] In a first embodiment, the present invention provides a display panel comprising a display driver chip and a pixel circuit, wherein the display driver chip is used to provide a source drive signal to the pixel circuit, and the source drive signal includes a non-display stage of the display screen for each frame. The display panel is provided in which the non-display stage includes a first adjustment stage, in which the source drive signal output from the display drive chip to the pixel circuit is adjusted to a target drive signal.

[0006] In one embodiment, the start time of the first adjustment stage coincides with the start time of the hiding stage.

[0007] In one embodiment, the end time of the first adjustment stage coincides with the end time of the hiding stage.

[0008] In one embodiment, the first adjustment step includes N sub-steps, where N is a positive integer, and the source drive signal jumps in at least one of the N sub-steps.

[0009] In one embodiment, the time length of at least one of the N sub-stages is greater than or equal to a predetermined recovery time length and less than or equal to the time length of the first adjustment stage, and the predetermined recovery time length is the data writing time length of the storage capacitance in the pixel circuit.

[0010] In one embodiment, the source drive signal jumps at the first sub-stage of the N sub-stages, and the start time of the first sub-stage of the N sub-stages coincides with the start time of the first adjustment stage.

[0011] In one embodiment, the time duration of the first sub-stage among the N sub-stages is equal to the time duration of the first adjustment stage.

[0012] In one embodiment, the source drive signal further includes the display stage of the display screen for each frame, wherein the duration of at least one of the N substages is greater than or equal to the duration of the coupling voltage generated by the pixel circuit during the display stage.

[0013] In one embodiment, the non-display stage further includes a second adjustment stage in addition to the first adjustment stage, in which the display drive chip adjusts the source drive signal output to the pixel circuit to a target drive signal.

[0014] In one embodiment, the duration of the second adjustment stage is equal to or greater than a predetermined recovery time, and the predetermined recovery time is the data writing time for the storage capacitance in the pixel circuit.

[0015] In one embodiment, the start time of the second adjustment stage coincides with the end time of the first adjustment stage.

[0016] In one embodiment, the end time of the second adjustment stage coincides with the end time of the hiding stage.

[0017] In one embodiment, the voltage range after the source drive signal jumps is 5 to 6V.

[0018] In a second embodiment, the present invention further provides a display device including the display panel described in any one of the above embodiments.

[0019] In a third embodiment, the present invention further provides a method for driving a display panel. The method for driving a display panel is applied to the display panel described in any one of the above embodiments, and the method is The source drive signal includes the non-display stage of the display screen for each frame. The non-display stage includes a first adjustment stage, in which the source drive signal output from the display drive chip to the pixel circuit is adjusted to the target drive signal.

[0020] In a fourth embodiment, the present invention provides a computer-readable storage medium in which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are realized. [Effects of the Invention]

[0021] In the display panel, the driving method of the display panel, and the display device according to the above embodiment, the display panel includes a display driving chip and a pixel circuit. The display driving chip is used to provide a source driving signal to the pixel circuit. The source driving signal includes a non-display stage of the display screen of each frame. The non-display stage includes a first adjustment stage. In the first adjustment stage, the display driving chip adjusts the source driving signal output to the pixel circuit to a target driving signal. By uniformly adjusting all the source driving signals of the display panel in the non-display stage of the display screen of each frame, the combined voltage by the black insertion algorithm in all the pixel circuits of the display panel is equalized, and the control of the uniformity of the display luminance of the display panel is realized.

[0022] To more clearly explain the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings necessary for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

Brief Description of the Drawings

[0023] [Figure 1] FIG. 1 is a structural schematic diagram of row sub-pixels and column sub-pixels of a display panel in an embodiment. [Figure 2] FIG. 2 is a circuit diagram of a pixel circuit in an embodiment. [Figure 3] FIG. 3 is a structural schematic diagram of a display panel in an embodiment. [Figure 4] FIG. 4 is a schematic diagram of the division of the non-display stage in an embodiment. [Figure 5] FIG. 5 is a positional schematic diagram of the R-corner region and the straight-edge region of a display panel in an embodiment. [Figure 6] FIG. 6 is a schematic diagram of the start time of the first adjustment stage in an embodiment. [Figure 7] FIG. 7 is a schematic diagram of the end time of the first adjustment stage in an embodiment. [Figure 8] FIG. 8 is a schematic diagram of the division of N sub-stages of the first adjustment stage in an embodiment. [Figure 9] Figure 9 is a schematic diagram of the start time of the first sub-stage T1 of the first adjustment stage in one embodiment. [Figure 10] Figure 10 is a schematic diagram of the black insertion stage in one embodiment. [Figure 11] Figure 11 is a schematic diagram of the start time of the second adjustment stage in one embodiment. [Figure 12] Figure 12 is a timing diagram of the source drive signal in one embodiment. [Figure 13] Figure 13 is a timing diagram of the source drive signal in another embodiment. [Figure 14] Figure 14 is a timing diagram of the source drive signal in yet another embodiment. [Figure 15] Figure 15 is a flowchart of the method for driving the display panel in one embodiment. [Modes for carrying out the invention]

[0024] To facilitate understanding of the present invention, the invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be realized in many different forms and is not limited to the embodiments described herein. Conversely, the purpose of providing these embodiments is to provide a more complete understanding of the disclosure of the invention.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those generally understood by those skilled in the art to the present invention. In this application, terms used in the specification of the present invention are used solely for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0026] When an element is said to be "fixed" to another element, it may be directly connected to the other element, or an intervening element may be present. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or an intervening element may be present simultaneously. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this application are for illustrative purposes only.

[0027] In drawings, the sizes of layers and regions may be exaggerated to clarify the explanation. When a layer or element is referred to as "on top of" another layer or substrate, it can be understood that the layer or element may be directly on top of the other layer or substrate, or there may be an intermediate layer. Similarly, when a layer is referred to as "between" two layers, it can be understood that the layer may be the only layer between the two layers, or there may be one or more intermediate layers. Also, the same reference numeral always indicates the same element.

[0028] In the following embodiments, when layers, regions, or elements are described as "connected," it can be interpreted that they are connected not only directly, but also via other constituent elements placed between them. For example, when layers, regions, elements, etc. are described as connected or electrically connected, they may be connected or electrically connected not only directly, but also via other layers, regions, elements, etc. placed between them.

[0029] The following terms, such as "First," "Second," etc., can be used to describe various assemblies, but these assemblies are not necessarily limited to those described above. The above terms are used solely to distinguish one assembly from another. Expressions used in the singular form may also be understood to include plural forms, unless the singular expression has a clearly different meaning in the context.

[0030] When an expression such as "at least one of..." follows a list of elements in a row, it modifies the entire row of elements, not just individual elements within that row. Furthermore, it should be understood that terms such as "include" or "possess" specify the existence of the described feature, whole, step, operation, assembly, part, or combination thereof, but do not exclude the possibility of the existence or addition of one or more other features, wholes, steps, operations, assemblies, parts, or combinations thereof.

[0031] An electronic or electrical device and / or any other related device or component according to an embodiment of the concept of the present invention as described herein (for example, a display device including a display panel and a display panel driver, wherein the display panel driver further includes a drive controller, a gate driver, a gamma reference voltage generator, a data driver and a transmit driver) may be implemented by any suitable hardware, firmware (e.g., application-specific integrated circuit), software, or a combination of software, firmware and hardware. For example, the various components of such devices may be formed on one integrated circuit (IC) chip or on separate IC chips. Furthermore, the various components of these devices may be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or on a single substrate. Furthermore, the various components of these devices may be processes or threads that execute computer program instructions by running on one or more processors in one or more computing devices, and interact with other system components to perform the various functions described herein. The computer program instructions are stored in memory, which is implemented in the computing device using standard storage devices (e.g., random access memory (RAM)). Computer program instructions may be stored on other non-temporary computer-readable media (e.g., CD-ROMs, flash drives, etc.). Furthermore, those skilled in the art should recognize that the functions of various computing devices may be combined or integrated into a single computing device, or the functions of a particular computing device may be distributed across one or more other computing devices, without departing from the spirit and scope of the exemplary embodiments of the concept of the present invention.

[0032] While exemplary embodiments of display modules and display devices including display modules have been described in this application, various modifications and changes will be apparent to those skilled in the art. Therefore, it can be understood that display modules and display devices including display modules, configured according to the principles of the present invention, may be implemented in ways other than those specifically described in this application. The present invention is further limited to the claims and their equivalents.

[0033] AMOLED (Active Matrix Organic Light Emitting Diode) flat panel displays use organic materials to manufacture light-emitting devices and TFTs to construct pixel circuits. An array arrangement is used between pixels, and the display panel uses a row-sequential scanning refresh method. In the display panel 100 shown in Figure 1, sub-pixels 120 in the same row are controlled by the same scanning signal, and sub-pixels 130 in the same column are connected to the same data signal line Sn. They receive source drive signals from the display driver chip on the data signal line Sn to acquire data signals. When the display panel is driven, the scanning signals corresponding to each row in the display panel shown in Figure 1 are sequentially controlled to turn on. The source drive signals provided by the display driver chip 110 write data signals to the pixel circuits via the data signal line Sn.

[0034] As explained in the background technology section, in the product design of display panels, the display panel is not necessarily a regular shape, and usually the outer shape of the display panel has an arc structure, which relates to the arc angle. Examples include the four R-angles of a mobile phone screen and the U-angle in a camera. With the continuous development of display technology, when a display panel has an R-angle or U-angle structure, it is necessary to improve the display effect of the panel by adopting a special algorithm for the R-angle or U-angle based on user needs. For example, the R-angle black insertion algorithm solves the related problems. For example, it compensates for jagged edges, smooths the transition of R-angles, or compensates for different R-angle arc angles according to user needs. Specifically, by adjusting the source drive signal, the black insertion voltage in the source drive signal is increased to achieve black insertion of R-angles.

[0035] Therefore, a black insertion algorithm is present at the R-angle or U-angle, and the pixel circuit of the sub-pixel at the corresponding position receives the black insertion voltage. As a result, there is no algorithmic processing at the right edge of the screen, and brightness unevenness exists in the sub-pixels at the R-angle and below the right edge. In the embodiment of the present invention, the pixel circuit may employ a driving circuit structure such as 2T1C, 3T1C, 4T1C, 5T1C, 6T1C, or 7T1C, and the light-emitting device may include an anode, an organic light-emitting layer, and a cathode. As shown in Figure 2, taking the 7T1C pixel circuit as an example, the 7T1C pixel circuit includes a driving transistor M1, a storage capacitor Cst, a data writing transistor M2, a threshold compensation transistor M3, a first initialization transistor M4, a second initialization transistor M7, a first light-emitting control transistor M5, and a second light-emitting control transistor M6. The R-angle black insertion algorithm causes node N2 of the pixel circuit of the subpixel below the R-angle to be affected by a coupled bias voltage, resulting in a negative drift in the threshold voltage of the driving transistor and causing it to light up. However, since there is no coupled bias voltage effect from the black insertion algorithm on the right side, the light emission is dimmer than that of the pixels below the R-angle.

[0036] An embodiment of the present invention provides a display panel, as shown in Figure 3, the display panel 300 includes a display driver chip 310 and a pixel circuit 320, the display driver chip 310 is used to provide a source drive signal to the pixel circuit 320, the source drive signal includes the non-display stage of the display screen for each frame, The non-display stage includes a first adjustment stage, in which the source drive signal output by the display drive chip to the pixel circuit 320 is adjusted to a target drive signal.

[0037] Organic light-emitting diode (OLED) display devices are recognized in the industry as the most promising display devices due to their many advantages, including self-emissive nature, low driving voltage, high luminous efficiency, short response time, high resolution and contrast, a viewing angle close to 180°, a wide operating temperature range, and the ability to achieve flexible display and large-area full-color display. OLEDs are current-driven devices; when current flows through an organic light-emitting diode, the diode emits light, and the luminescence brightness is determined by the current flowing through the organic light-emitting diode itself. The display driver chip 310 is one of the main control elements of the display panel 300. The display driver chip 310 transmits drive signals and data to the display panel in the form of electrical signals, thereby enabling control over the brightness and color of the screen and displaying image information on the screen.

[0038] The display driver chip 310 consists of a gate driver chip and a source driver chip. The former is used to control the state of the gate switches of the subpixels, and the latter is used to adjust the image signals of the subpixels to generate the necessary color effects. In this embodiment, the source driver signal is the data signal that the source driver chip in the display driver chip 310 provides to the pixel circuit of each subpixel.

[0039] In the field of display technology, the tearing effect is a phenomenon caused by a mismatch in read and write speeds to graphics random access memory (GRAM). When the write pointer (W) and read pointer (R) overlap, parts of the old and new screens are displayed on the screen, a phenomenon known as tearing. Ideally, to avoid tearing, the W:R ratio should be greater than 1:2.

[0040] The tearing effect (TE) signal is a signal generated by the display driver chip 310 and is used to prevent tearing problems during screen refresh in the image display process. When the image for the next frame is ready to be refreshed, the display driver chip 310 immediately generates a TE signal, and preferably, after monitoring the rising edge of the TE signal or after detecting that the TE signal is at a high level, the application processor (AP) transmits the image data for the next frame to the display driver chip 310.

[0041] As shown in Figure 4, in driving the display panel, the TE signal divides all stages corresponding to the display screen of each frame in the source drive signal Source into a display stage and a non-display stage. In the display stage, the source drive signal Source is transmitted to the pixel circuit via the data signal line, and the pixel circuit refreshes the display based on the received data signal. In the non-display stage, even if the pixel circuit receives a data signal, it does not refresh the display, but continues to hold and display the data signal from the last time in the display stage. Note that the Source signal in Figure 4 is used only to understand the division of the display screen of each frame into a display stage and a non-display stage, and does not limit the Source signal used to drive the display panel in actual applications.

[0042] Depending on the user's display needs for the display panel, black insertion processing is performed on specific areas of the display panel during the display stage, such as the subpixels of the R-angle region 510 in Figure 5. However, due to the presence of the black insertion algorithm, the pixel circuit of the subpixels in the R-angle region 510 receives a data signal for black insertion, which causes negative pressure coupling at node N2 in the pixel circuit, resulting in the subpixels in the R-angle region 510 having higher brightness than the subpixels in the right-side region 520. To resolve the brightness bias problem of the subpixels in the R-angle region 510 caused by the black insertion algorithm, the source drive signals corresponding to the subpixels of the R-angle region 510 and the right-side region 520 are adjusted during the non-display stage of the display screen for each frame, and the source drive signal is set as the target drive signal, which then collectively eliminates the negative pressure coupling of all subpixels.

[0043] Therefore, a first adjustment stage is set at the non-display stage of each display screen, and within the first adjustment stage, the display drive chip adjusts the source drive signal output to the pixel circuit. The first adjustment stage may be any period within the non-display stage, the duration of the first adjustment stage is determined according to the duration of negative pressure coupling due to the black insertion voltage in the pixel circuit, and the number of first adjustment stages may be one or multiple.

[0044] In the display panel according to the above embodiment, the display driver chip is used to provide a source drive signal to the pixel circuit. The source drive signal includes a blackout stage for the display screen of each frame, and the blackout stage includes a first adjustment stage. In the first adjustment stage, the source drive signal output by the display driver chip to the pixel circuit is adjusted to a target drive signal. By uniformly adjusting all source drive signals of the display panel during the blackout stage for the display screen of each frame, the coupling voltage by the black insertion algorithm in all pixel circuits of the display panel is leveled, thereby achieving uniformity control of the display brightness of the display panel.

[0045] In one embodiment, as shown in Figure 6, the start time of the first adjustment stage coincides with the start time of the hiding stage.

[0046] In this embodiment, immediately after the non-display stage begins, all source drive signals are adjusted to the target drive signal. At this time, for subpixels with a black insertion algorithm at the R angle, the source drive signal of the column in which they are located does not need to jump. That is, if the black insertion voltage and the target drive signal voltage are the same, the black insertion voltage at the end of the display stage for the R-angle subpixel is retained, and only the source drive signal corresponding to the right edge is adjusted to the target drive signal, thereby completing the simultaneous elimination of the coupled voltages.

[0047] In one embodiment, as shown in Figure 7, the end time of the first adjustment stage coincides with the end time of the hiding stage.

[0048] In this embodiment, the entire non-display stage is set as the first adjustment stage, and only one adjustment is required for the source drive signal, eliminating the need for two adjustments and thus reducing the number of adjustments.

[0049] In one embodiment, as shown in Figure 8, the first adjustment step consists of N sub-steps T N This includes, where N is a positive integer, and the source drive signal jumps in at least one of the N substages.

[0050] Here, the first adjustment stage is divided into several discontinuous parts in the sub-stages, and one or more stages from the N sub-stages of the first adjustment stage are arbitrarily selected to adjust the source drive signal.

[0051] In one embodiment, the time length of at least one of the N sub-stages is greater than or equal to a predetermined recovery time length and less than or equal to the time length of the first adjustment stage, and the predetermined recovery time length is the data writing time length of the storage capacitance in the pixel circuit.

[0052] Here, the predetermined recovery time length is the data writing time length of the storage capacitance in the pixel circuit, that is, the time length over which the data signal in the target drive signal can be written to the storage capacitance in the pixel circuit, and the predetermined recovery time length is used to guarantee the target drive signal, that is, the adjustment to the source drive signal can eliminate the influence of the coupling voltage within a sufficient time. At least one of the N sub-stages is used to adjust the source drive signal.

[0053] In one embodiment, as shown in Figure 9, the source drive signal jumps at the first sub-stage T1 of the N sub-stages, and the start time of the first sub-stage of the N sub-stages coincides with the start time of the first adjustment stage.

[0054] Here, the first sub-stage T1 is the first sub-stage determined based on the time order among the N sub-stages of the source drive signal. The time order refers to the signal generation time or the reception time when the pixel circuit receives the data signal. Looking at the timing diagram, the first sub-stage T1 is the leftmost sub-stage in the timing diagram, and the start time of the first sub-stage T1 coincides with the start time of the first adjustment stage. In other words, in this embodiment, the source drive signal is adjusted to the target drive signal at the start time of the first adjustment stage, and the signal is held based on the time length of the divided first sub-stage. Note that in the timing diagram shown in Figure 9, for the R-angle Source, it differs from the right-side Source at stage T0, just before the end of the display stage, due to the presence of the black insertion algorithm. Therefore, in this embodiment, the source drive signal jumps at the first sub-stage T1 among the N sub-stages, that is, the source drive signal corresponding to the sub-pixel in the right-side region is adjusted, and for the R-angle region, adjustment is not necessary if the black insertion voltage matches the voltage of the target drive signal, and adjustment is necessary otherwise.

[0055] In one embodiment, the time duration of the first sub-stage among the N sub-stages is equal to the time duration of the first adjustment stage.

[0056] The fact that the duration of the first sub-stage is equal to the duration of the first adjustment stage indicates that, after the source drive signal is adjusted to the target drive signal at the start of the first adjustment stage, the output from the display panel's drive signal is always maintained at the target drive signal throughout the entire first adjustment stage.

[0057] In one embodiment, the source drive signal further includes the display stage signals of the display screen for each frame, wherein the duration of at least one of the N sub-stages is greater than or equal to the duration of the coupling voltage generated by the pixel circuit during the display stage.

[0058] Since the adjustment to the source drive signal in the embodiment of the present invention is for the purpose of eliminating the coupling voltage by the black insertion algorithm, it can be understood that the duration of at least one sub-stage representing the duration of the target drive signal should be greater than or equal to the duration of the coupling voltage generated by the pixel circuit at the display stage.

[0059] In one embodiment, the non-display stage further includes a second adjustment stage in addition to the first adjustment stage, in which the source drive signal output by the display drive chip to the pixel circuit is adjusted to a target drive signal.

[0060] As can be seen from the driving principle of the display panel, the display panel refreshes data using a row-by-row scanning method during operation, so the data on one frame of the display screen includes data writing stages corresponding to each row. Therefore, when inserting blacks for R angles, the black insertion algorithm includes not only black insertion for the upper R angle but also black insertion for the lower R angle, as shown in the T0 stage and T stage in Figure 10. N+1 This is how it works. Considering the transmission time of the data signal on the data line, as shown in the second adjustment stage in Figure 7, it is not only necessary to adjust the source drive signal during the data writing stage corresponding to the upper R angle, but also during the data writing stage corresponding to the lower R angle.

[0061] In one embodiment, similarly, the duration of the second adjustment stage is greater than or equal to a predetermined recovery time, and the predetermined recovery time is the data writing time for the storage capacitance in the pixel circuit.

[0062] In one embodiment, as shown in Figure 11, the start time of the second adjustment stage coincides with the end time of the first adjustment stage.

[0063] In one embodiment, the end time of the second adjustment stage coincides with the end time of the hiding stage.

[0064] In one embodiment, the voltage range after the source drive signal jumps is 5 to 6V.

[0065] In one exemplary embodiment, a display panel is provided, the display panel including a display driver chip and a pixel circuit, the display driver chip is used to provide a source drive signal to the pixel circuit, and by setting a first adjustment step in the non-display stage (blank region) of the source drive signal (i.e., inserting a few rows of dummy data), black (gray) insertion processing is achieved for R angles + right edges, and the difference in combination is leveled.

[0066] Specifically, as shown in Figure 12, a few lines of dummy data may be inserted into the front pouch Vfp of the frame synchronization signal at the end of the display stage of each frame's display screen, and as shown in Figure 13, a few lines of dummy data may be inserted into either the front pouch Vfp of the frame synchronization signal and the front pouch Vdp of the frame synchronization signal at the end of the display stage of each frame's display screen. Alternatively, as shown in Figure 14, the target drive signal may be held throughout the entire non-display stage of each frame's display screen.

[0067] Here, the number of rows into which dummy data is inserted is determined based on the presence of coupling voltage and the duration for which the display panel's pixel circuit receives the data signal. Typically, the number of rows is two or more. The voltage value into which dummy data is inserted is related to the performance parameters of the transistors used in the display panel's pre-estimation circuit. Typically, the voltage range after the source drive signal jumps (target drive signal) is 5-6V.

[0068] In the above embodiment, a few rows of dummy data are inserted into the Vfp and / or Vfp at the end of the display stage of each frame's display screen, synchronously leveling the coupling between the R angle and the right edge to the TFT. The advantage is that it does not affect the pixels and brightness of the display area and has little impact on power consumption. In the non-display stage after the end of the display stage of each frame's display screen, the source drive signal is always held in dummy data, synchronously leveling the coupling between the R angle and the right edge to the TFT. The advantage is that it does not affect the pixels and brightness of the display area.

[0069] Based on a similar inventive concept, embodiments of the present invention further provide a method for driving a display panel for driving the display panel described above. The method is applied to a display driver chip of the display panel and includes the following steps, as shown in Figure 15: Step 1502: The source drive signal includes the non-display stage of the display screen for each frame. Step 1504: The non-display stage includes a first adjustment stage, in which the display driver chip adjusts the source driver signal output to the pixel circuit to a target driver signal.

[0070] In the method according to the above embodiment, the display driver chip is used to provide a source drive signal to the pixel circuit. The source drive signal includes a blackout stage for the display screen of each frame, and the blackout stage includes a first adjustment stage. In the first adjustment stage, the display driver chip adjusts the source drive signal output to the pixel circuit to a target drive signal. By uniformly adjusting all source drive signals of the display panel during the blackout stage for the display screen of each frame, the coupling voltage by the black insertion algorithm in all pixel circuits of the display panel is leveled, thereby achieving uniformity control of the display brightness of the display panel.

[0071] To ensure clarity, the steps in the flowcharts for each embodiment described above are shown sequentially according to the arrows; however, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise explicitly stated in this application, the execution of these steps is not limited to a strict order and may be performed in other orders. Furthermore, at least some of the steps in the flowcharts for each embodiment described above may include multiple steps or stages, and these steps or stages do not necessarily need to be completed at the same time; they may be executed at different times. The execution order of these steps or stages also does not necessarily need to be sequential; they may be executed sequentially or alternately with other steps or at least some of the steps or stages in other steps.

[0072] At least one embodiment of the present invention further provides a display device including a display panel as described in any of the above embodiments. The display panel is a display module for displaying images and is typically provided on the front panel of a terminal. The display panel may be designed as a full screen, a curved screen, an irregularly shaped screen, a double-sided screen, or a foldable screen. The display panel may also be designed as a combination of a full screen and a curved screen, or a combination of an irregularly shaped screen and a curved screen, and this embodiment is not limited thereto.

[0073] The display device in the embodiments of the present invention may be any product or component having a display function, such as an OLED (Organic Light-Emitting Diode) display device, a QLED (Quantum Dot Light-Emitting Diode) display device, electronic paper, a mobile phone, a tablet, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable device, or an Internet of Things device, and the embodiments disclosed in the present invention are not limited thereto. Preferably, the display device may be an OLED display device, and may be a Low Temperature Poly-Silicon (LTPS) AMOLED display or a Low Temperature Polycrystalline Oxide (LTPO) AMOLED display. A display driver chip is used to drive the display and display an image.

[0074] In one embodiment, a computer-readable storage medium in which a computer program is stored is provided, and when the computer program is executed by a processor, the steps of the method for driving a display panel described in any of the embodiments described above are realized.

[0075] For the sake of simplicity and conciseness, only the division of each functional unit described above has been explained as an example. However, it will be apparent to those skilled in the art that in actual applications, the above functions can be completed by assigning them to different functional units or modules as needed, that is, by dividing the internal structure of the device into different functional units or modules, thereby completing all or part of the functions described above. Each functional unit or module in the embodiment may be integrated into a single processing unit, each unit may exist physically independently, two or more units may be integrated into a single unit, and the integrated unit may be implemented in hardware form or in the form of a software functional unit. Furthermore, the specific names of each functional unit or module are for distinguishing them from one another and do not limit the scope of protection of the present invention. The specific operating processes of the units and modules in the above system can be described by referring to the corresponding processes in the method embodiments described above, and are omitted here.

[0076] In the above embodiments, the descriptions of each embodiment are biased, and for parts not detailed or described in one embodiment, you can refer to the relevant descriptions in other embodiments.

[0077] Those skilled in the art will recognize that the units and algorithmic steps of each example described with reference to the embodiments disclosed herein can be implemented in electronic hardware or in combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the method for driving the display panel. While experts in the art may implement the described functions using different methods for each specific application, such implementations should not be considered to be beyond the scope of the present invention.

[0078] In embodiments of the present invention, it should be understood that the disclosed devices / user terminals and methods can be implemented in other ways. For example, the embodiments of the devices / user terminals described above are schematic only, and for example, the division of modules or units is only a division of logical functions, and there may be other division methods when actually implemented, for example, multiple units or assemblies may be combined or integrated into another system, or some features may be ignored or not performed. Also, the combinations, direct combinations or communication connections between things shown or discussed may be indirect combinations or communication connections through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

[0079] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of these units can be selected as needed to achieve the objectives of the solution of this embodiment. Furthermore, each functional unit in each embodiment of the present invention may be integrated into a single processing unit, each unit may exist physically independently, or two or more units may be integrated into a single unit. The integrated units may be implemented in hardware form or in the form of software functional units.

[0080] The integrated modules / units may be implemented in the form of software function units and, when sold or used as independent products, may be stored on a computer-readable storage medium. Based on this understanding, the present invention may implement all or part of the processes in the above embodiments, completing them by instructing the relevant hardware with a computer program, the computer program may be stored on a computer-readable storage medium, and when the computer program is executed by a processor, the steps of each embodiment of the above methods can be implemented. Here, the computer program includes computer program code, which may be in source code format, object code format, executable file or some intermediate format, etc. The computer-readable medium may include any entity or device that can carry the computer program code, recording media, U disks, removable hard disks, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunications signals and software distribution media, etc. Furthermore, the content contained in computer-readable media may be increased or decreased as appropriate in accordance with the legislative and patent practice requirements of the jurisdiction. For example, in a given jurisdiction, according to legislative and patent practice, computer-readable media may not contain electrical carrier signals or telecommunications signals.

[0081] In this specification, any reference to terms such as “several examples,” “other examples,” or “ideal examples” means that the specific features, structures, materials, or characteristics described with reference to such examples or illustrations are included in at least one example or illustration of the present invention. In this specification, a schematic description of the above terms does not necessarily refer to the same example or illustration.

[0082] The technical features of the embodiments described above can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the embodiments described above will be explained. However, as long as these combinations of technical features are not contradictory, they should be considered to fall within the scope described herein.

[0083] The above-described embodiments are merely examples of some embodiments of the present invention, and although the descriptions are specific and detailed, they should not be understood as limiting the scope of the invention patent. Those skilled in the art will be able to point out that several modifications and improvements can be made without departing from the concept of the present invention, and all of these fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the appended claims.

Claims

1. A display panel including a display driver chip and a pixel circuit, The display driver chip is used to provide a source drive signal to the pixel circuit, and the source drive signal includes the non-display stage of the display screen for each frame. The display panel wherein the non-display stage includes a first adjustment stage, in which the source drive signal output from the display drive chip to the pixel circuit is adjusted to a target drive signal.

2. The display panel according to claim 1, wherein the start time of the first adjustment stage coincides with the start time of the non-display stage.

3. The display panel according to claim 2, wherein the end time of the first adjustment stage coincides with the end time of the non-display stage.

4. The display panel according to claim 1, wherein the first adjustment step comprises N sub-steps, where N is a positive integer, and the source drive signal jumps at at least one of the N sub-steps.

5. The display panel according to claim 4, wherein the time length of at least one of the N sub-stages is greater than or equal to a predetermined recovery time length and less than or equal to the time length of the first adjustment stage, and the predetermined recovery time length is the data writing time length of the storage capacitance in the pixel circuit.

6. The display panel according to claim 5, wherein the source drive signal jumps at the first sub-stage of the N sub-stages, and the start time of the first sub-stage of the N sub-stages coincides with the start time of the first adjustment stage.

7. The display panel according to claim 6, wherein the time duration of the first sub-stage among the N sub-stages is equal to the time duration of the first adjustment stage.

8. The display panel according to claim 4, wherein the source drive signal further includes the display stages of the display screen for each frame, and the duration of at least one of the N substages is greater than or equal to the duration of the coupling voltage generated by the pixel circuit in the display stage.

9. The display panel according to claim 1, wherein the non-display stage further includes a second adjustment stage in addition to the first adjustment stage, and in the second adjustment stage, the source drive signal output from the display drive chip to the pixel circuit is adjusted to the target drive signal.

10. The display panel according to claim 9, wherein the duration of the second adjustment stage is greater than or equal to a predetermined recovery time, and the predetermined recovery time is the data writing time for the storage capacitance in the pixel circuit.

11. The display panel according to claim 9, wherein the start time of the second adjustment stage coincides with the end time of the first adjustment stage.

12. The display panel according to claim 11, wherein the end time of the second adjustment stage coincides with the end time of the non-display stage.

13. The display panel according to any one of claims 1 to 12, wherein the voltage range after the source drive signal jumps is 5 to 6V.

14. A display device comprising a display panel according to any one of claims 1 to 13.

15. A method for driving a display panel, The method for driving the display panel is applied to the display panel described in any one of claims 1 to 13. The source drive signal includes the non-display stage of the display screen for each frame. The aforementioned non-display stage includes a first adjustment stage, A method for driving a display panel, comprising adjusting the source drive signal output from the display drive chip to the pixel circuit to a target drive signal during the first adjustment stage.

16. A computer-readable storage medium in which computer programs are stored, A computer-readable storage medium wherein, when the computer program is executed by the processor, the steps of the method for driving a display panel according to claim 15 are realized.

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