Display device and driving method thereof

Abstract

The application discloses a display device and a driving method thereof, wherein the display device comprises: a plurality of pixel circuits arranged in an array, a first voltage line, a first scanning circuit and a plurality of first scanning lines, the first scanning circuit is electrically connected with the pixel circuits of a corresponding row through a corresponding first scanning line; the first voltage line is electrically connected with the pixel circuits, and the pixel circuits are used for writing the voltage on the first voltage line into the pixel circuits in response to a pulse signal of a first scanning signal on the first scanning line; in at least one picture refresh period, in a first period, pulse signals with a first pulse width are simultaneously output to N first scanning lines, in a second period, pulse signals with a second pulse width are simultaneously output to M first scanning lines, N and M are positive integers; the first pulse width is not equal to the second pulse width. The technical scheme provided by the application improves the split screen problem of the display device and improves the display effect of the display device.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display device and its driving method. Background Technology

[0002] With the development of display technology, people have increasingly higher requirements for the quality of image display.

[0003] In existing organic light-emitting display panels, uneven display is a problem, which affects the display effect. Summary of the Invention

[0004] This invention provides a display device and its driving method to improve the problem of screen splitting in the display device and enhance the display effect of the display panel.

[0005] According to one aspect of the present invention, a display device is provided, comprising:

[0006] Multiple pixel circuits arranged in an array;

[0007] The first scanning circuit and multiple first scanning lines are connected to the pixel circuit of the corresponding row via the corresponding first scanning lines.

[0008] The first voltage line is electrically connected to the pixel circuit. The pixel circuit is used to write the voltage on the first voltage line into the pixel circuit in response to the pulse signal of the first scan signal on the first scan line.

[0009] Within at least one frame refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines, and in the second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines, where N and M are positive integers; the first pulse width and the second pulse width are not equal.

[0010] Optionally, N and M are not equal positive integers, N is greater than M, and the first pulse width is greater than the second pulse width;

[0011] Optionally, the first voltage line is used to provide an initialization voltage; the pixel circuit includes a first initialization module, the control terminal of the first initialization module is electrically connected to the first scan line, and the first initialization module is connected between the first electrode of the corresponding light-emitting device and the first voltage line;

[0012] The display panel includes n first areas and m second areas arranged alternately along a first direction. During a first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to the n spaced first areas. During a second time period, pulse signals with a second pulse width are simultaneously output to the first scan lines corresponding to the m spaced second areas. n and m are unequal positive integers. The first direction intersects with the extension direction of the first scan lines.

[0013] Optionally, n is greater than m, and the first pulse width is greater than or less than the second pulse width;

[0014] Optional, nm = 1;

[0015] Optionally, the pulse width of the pulse signal of the first scan signal is the duration of the conduction level of the first initialization module.

[0016] Optionally, the display device may also include:

[0017] Subpixels include electrically connected pixel circuitry and light-emitting devices;

[0018] At least one voltage detection line, one end of which is electrically connected to the first electrode of the light-emitting device of the sub-pixel, and the other end is connected to the detection module, so as to detect the voltage of the first electrode of the light-emitting device through the detection module, and determine the second pulse width based on the detected voltage of the first electrode of the light-emitting device;

[0019] The maximum refresh rate of the display device is less than the frequency of the pulse signal of the first scan signal of the display device;

[0020] The refresh cycle of a single screen includes an effective phase and a vertical blanking phase. The first time period is in the effective phase, and the second time period is in the vertical blanking phase.

[0021] Optionally, a screen refresh cycle includes a write frame, with the effective phase located in the write frame and at least a portion of the vertical blanking phase located in the write frame.

[0022] Optionally, a screen refresh cycle also includes a hold frame, with part of the vertical blanking phase occurring in the write frame and part of the vertical blanking phase occurring in the hold frame.

[0023] Optionally, the detection module is used to detect the first electrode voltage of the light-emitting device located in the second region, determine the charging time required for the first electrode of the light-emitting device located in the second region to charge to the target voltage value during the initialization process based on the detected first electrode voltage of the light-emitting device, and adjust the initialization time of the first electrode of the light-emitting device located in the second region according to the required charging time.

[0024] Optionally, the second region is determined based on the first electrode reset frequency or the number of first pulses of the light-emitting device of the display device, and the ratio of the vertical blanking phase to the row scanning time of the first scan signal in a frame when the screen refresh rate is at the maximum refresh rate; the number of first pulses is the number of turn-on pulses of the first scan signal received by a pixel circuit after the data writing phase of the pixel circuit in a frame when the screen refresh rate is at the maximum refresh rate; the vertical blanking phase in a frame when the screen refresh rate is at the maximum refresh rate is the phase between the output time of the pulse of the second scan signal corresponding to the last row of pixel circuits of the display panel in the current frame and the output time of the pulse of the second scan signal corresponding to the first row of pixel circuits of the display panel in the next frame when the screen refresh rate is at the maximum refresh rate; the second scan signal is used to control the writing of data voltage;

[0025] Optionally, the number of the first pulses is greater than or equal to 2; or the number of the first pulses is equal to n.

[0026] Optionally, at least one voltage detection line may include multiple voltage detection lines; multiple sub-pixel arrays may be arranged, with light-emitting devices in the sub-pixels located in the same row electrically connected to the same voltage detection line.

[0027] Optionally, the absolute value of the difference between the first pulse width and the second pulse width is equal to the absolute value of the difference between the charging time required for the first electrode of the light-emitting device in the first region to charge to the target voltage value during the initialization process in the first time period and the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process in the second time period.

[0028] Optionally, the pixel circuit further includes a driving module and a second initialization module; the second initialization module is electrically connected to a second or first terminal of the driving module; the control terminal of the second initialization module is connected to a first scan signal; the driving module is used to output driving current to the light-emitting device.

[0029] Optionally, the pixel circuit also includes a data writing module and a compensation module; the data writing module is electrically connected to the first terminal of the driving module; the compensation module is connected between the control terminal and the second terminal of the driving module.

[0030] Optionally, the detection module includes:

[0031] The detection submodule is used to receive the voltage of the first electrode of the light-emitting device detected by the voltage detection line, and determine the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process based on the voltage of the first electrode of the light-emitting device.

[0032] The timing control submodule is used to adjust the initialization time of the first electrode of the light-emitting device electrically connected to the voltage detection line according to the required charging time.

[0033] Optionally, the detection module includes multiple voltage detection ports and multiple voltage detection lines; each voltage detection line is electrically connected to a corresponding voltage detection port.

[0034] According to another aspect of the present invention, a driving method for a display device is provided, for driving a display device according to any embodiment of the present invention; the driving method includes:

[0035] During at least one frame refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines.

[0036] During the second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines, where N and M are positive integers; the first pulse width and the second pulse width are not equal.

[0037] Optionally, N and M are not equal positive integers, N is greater than M, and the first pulse width is greater than the second pulse width;

[0038] The first voltage line is used to provide the initialization voltage;

[0039] The pixel circuit includes a first initialization module; the control terminal of the first initialization module is electrically connected to the first scan line, and the first initialization module is connected between the first electrode of the corresponding light-emitting device and the first voltage line;

[0040] The display panel includes n first zones and m second zones arranged alternately along a first direction.

[0041] In the first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines, including:

[0042] In the first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to the n first regions at intervals;

[0043] In the second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines, including:

[0044] During the second time period, pulse signals with a second pulse width are simultaneously output to the first scan lines corresponding to the m intervals of the second region, where n and m are unequal positive integers; the first direction intersects with the extension direction of the first scan line;

[0045] Optional, n is greater than m, and the first pulse width is greater than the second pulse width;

[0046] Optionally, the pulse width of the pulse signal of the first scan signal is the duration of the conduction level of the first initialization module;

[0047] Optionally, the display device further includes at least one voltage detection line, one end of which is electrically connected to the first electrode of the light-emitting device of the sub-pixel, and the other end is connected to the detection module; the driving method further includes:

[0048] Obtain the first electrode voltage of the light-emitting device detected by the voltage detection line;

[0049] The second pulse width is determined based on the first electrode voltage of the light-emitting device fed back by the voltage detection line.

[0050] Optionally, the maximum refresh rate of the display device is less than the frequency of the first scan signal of the display device;

[0051] The second pulse width is determined based on the first electrode voltage of the light-emitting device fed back from the voltage detection line, including:

[0052] Within a preset screen refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to n intervals of the first area, and in the second time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to m intervals of the second area.

[0053] Based on the voltage of the first electrode of the light-emitting device fed back by the voltage detection line, determine the charging time required for the first electrode of the light-emitting device in the second region to be charged to the target voltage value during the initialization process.

[0054] The second pulse width is determined based on the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process;

[0055] Optionally, determining the second pulse width based on the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process includes:

[0056] The second pulse width is determined based on the difference between the charging time required for the first electrode of the light-emitting device in the first area to charge to the target voltage value during the initialization process of the first time period and the charging time required for the first electrode of the light-emitting device in the second area to charge to the target voltage value during the initialization process of the second time period within the preset screen refresh cycle.

[0057] Optionally, the first electrode of the light-emitting device is the anode, and the scanning signal on the first scan line is the anode initialization control signal.

[0058] Optionally, based on the voltage of the first electrode of the light-emitting device fed back from the voltage detection line, before determining the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process, the following steps are included:

[0059] The target voltage value is determined based on the initial voltage of the first electrode of the light-emitting device in the first time period;

[0060] The absolute value of the difference between the first pulse width and the second pulse width is equal to the absolute value of the difference between the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process in the first time period and the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process in the second time period.

[0061] The technical solution provided by this invention provides that, within at least one screen refresh cycle, in a first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines, and in a second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines, where N and M are positive integers. The first pulse width and the second pulse width are not equal. By outputting different pulse widths to the first scan lines in different areas, the charging voltage of the light-emitting devices after anode initialization is consistent or approximately equal in each time period within at least one screen refresh cycle. This improves the multi-screen problem caused by load differences in initialization voltage in different time periods and enhances the display effect of the display device.

[0062] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0063] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0064] Figure 1 This is a schematic diagram of an anode initialization control signal pulse not entering the Vblank region, provided in related technologies;

[0065] Figure 2 This is a schematic diagram of an anode initialization control signal pulse entering the Vblank region, provided in related technologies;

[0066] Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention;

[0067] Figure 4 yes Figure 3 Supplementary diagram of the first scan line in the structure shown;

[0068] Figure 5 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention;

[0069] Figure 6This is a comparison chart of the frame duration when the refresh rate of a display panel is 120Hz and 60Hz, according to an embodiment of the present invention.

[0070] Figure 7 This is a schematic diagram of another anode initialization control signal pulse not entering the Vblank region provided in an embodiment of the present invention;

[0071] Figure 8 This is a schematic diagram of another anode initialization control signal pulse entering the Vblank region provided in an embodiment of the present invention;

[0072] Figure 9 This is a timing comparison diagram before and after the adjustment of the anode initialization control signal in the second time period provided by an embodiment of the present invention;

[0073] Figure 10 This is a comparison diagram of the change of anode voltage over time during the charging process of the light-emitting device before and after the anode initialization control signal enters the Vblank region, according to an embodiment of the present invention.

[0074] Figure 11 This is a circuit diagram of another pixel circuit provided in an embodiment of the present invention;

[0075] Figure 12 This is a timing diagram of a pixel circuit provided in an embodiment of the present invention. Detailed Implementation

[0076] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0077] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0078] As the background technology suggests, with the development of display technology, people have increasingly higher requirements for image display quality. The operating state of the driving transistors in the pixel circuit has a significant impact on the display effect of Organic Light Emitting Diode (AMOLED) display devices. In traditional "7T1C" pixel circuits, because the potential of the driving transistors cannot remain stable for a long time, the gate-source potentials of the driving transistors differ between the write frame and hold frame states. This results in different bias states of the driving transistors, leading to different brightness levels between the write and hold frames during low-frequency driving, resulting in poor low-frequency, low-grayscale display.

[0079] To address the shortcomings of the "7T1C" pixel circuit, the industry invented the "8T1C" pixel circuit, which adds a transistor to perform high-frequency resets of the source or drain of the driving transistor, thereby improving low-frequency flicker. However, in the "8T1C" pixel circuit, the transistor performing high-frequency resets of the source or drain of the driving transistor and the transistor resetting the OLED anode are controlled by the same signal. This results in an excessively high frequency of OLED anode initialization, causing differences in the degree of OLED anode initialization at different times, leading to a split-screen problem on the display panel. The specific reasons are analyzed below:

[0080] Taking a maximum refresh rate of 120Hz for the display screen and a frequency of 360Hz for the anode initialization control signal as an example. Figure 1 This is a schematic diagram provided in related technologies showing that the pulse of the anode initialization control signal does not enter the Vblank region. Figure 2 This is a schematic diagram of an anode initialization control signal pulse entering the Vblank region, as provided in related technologies, see reference 1 and... Figure 2 The VActive area is the actual display area with sub-pixels, equivalent to the display area of ​​the display panel, while the Vblank area is a virtual area corresponding to the number of pixel rows that pulse a in the vertical blanking stage control signal SP2 can scan in a frame; it is an area that does not actually exist. At this time, within a frame (within a screen refresh cycle), the scan signal used to control the writing of data voltage is output line by line to all pixel rows; the control signal used to control the anode reset corresponding to the same pixel has three pulses after the data writing stage of that pixel circuit. Figure 1 In the process, the three pulses of the control signal SP2, which controls the anode reset, are all in the VActive region. This means that at the same time, the initialization voltage needs to charge the anodes of three sub-pixels at three positions in the column direction of the display panel, each position corresponding to one or more rows of sub-pixels. As the three pulses scan (equivalent to moving downwards) in the display panel, Figure 2In the diagram, pulse a enters the Vblank area (a hypothetical area without pixels for ease of understanding), while the two pulses (pulse b and pulse c) in the control signal SP2 controlling anode reset are in the VActive area. This means that simultaneously, the initialization voltage needs to charge and reset the anodes of two sub-pixels in the column direction of the display panel. Therefore, from the moment pulse a appears in the Vblank area, the load decreases, from three sub-pixels to two, thus reducing the load by 1 / 3. The two sub-pixels corresponding to the two pulses in the VActive area are initialized. Due to the reduced load, the anode charging speed of the light-emitting device accelerates; since the charging time remains constant, the charging is sufficient, resulting in a lower anode potential of the light-emitting device and a dimmer brightness for the sub-pixels. A black line appears at the positions corresponding to the two pulses (pulse b and pulse c), resulting in two black lines. Since the Vblank area has a certain width, the area swept by the two black lines forms two Mura areas, dividing the display panel into three segments.

[0081] Therefore, embodiments of the present invention provide a display device. Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Figure 4 yes Figure 3 Supplementary diagram of the first scan line in the structure shown, for reference. Figure 3 and Figure 4 ,include:

[0082] Multiple pixel circuits arranged in an array;

[0083] The first scanning circuit and multiple first scanning lines are connected to the pixel circuit of the corresponding row via the corresponding first scanning lines.

[0084] The first voltage line is electrically connected to the pixel circuit. The pixel circuit is used to write the voltage on the first voltage line into the pixel circuit in response to the pulse signal of the first scan signal on the first scan line.

[0085] During at least one screen refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines, and in the second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines.

[0086] Optionally, N and M are unequal positive integers; the first pulse width and the second pulse width are unequal. In the first time interval, pulse signals (enable pulses) with the first pulse width output to N first scan lines overlap. In the second time interval, pulse signals (enable pulses) with the second pulse width output to M first scan lines overlap.

[0087] Specifically, the display area of ​​the display device includes an array substrate and a light-emitting device layer disposed on the array substrate. The array substrate refers to a film layer structure that provides driving signals to the display device and serves as a buffer, protector, or support; it includes a substrate and a driving circuit layer disposed on the substrate. The driving circuit layer includes multiple pixel circuits arranged in an array, as well as multiple data signal lines (D1 to Dr), multiple second scan signal lines (S1 to Sq) for controlling data voltage writing, and multiple light-emitting control signal lines (E1 to Eo). The data driver 300 is connected to the multiple data signal lines (D1 to Dr), the scan driver 100 is connected to the multiple second scan signal lines (S1 to Sq), and the light-emitting control driving circuit 200 is connected to the multiple light-emitting control signal lines (E1 to Eo). The light-emitting device layer includes multiple light-emitting devices; a pixel circuit and a correspondingly connected light-emitting device constitute a sub-pixel. Multiple sub-pixels Pxij are arranged in an array, where i and j are non-zero natural numbers. The pixel circuits are connected to the second scan signal lines, the light-emitting control signal lines, and the data signal lines, respectively. The data signal line is configured to provide data voltage to the pixel circuit, the second scan signal line is configured to provide a scan signal to the pixel circuit to control the writing of data voltage, and the light emission control signal line is configured to provide a light emission control signal to the pixel circuit, thereby realizing the light emission control of the light emission device.

[0088] A screen refresh cycle includes a first time period and a second time period. A screen refresh cycle can be one of at least one screen refresh cycles, or each of multiple screen refresh cycles, or each of at least one screen refresh cycle among multiple screen refresh cycles.

[0089] refer to Figure 4The driving circuit layer also includes a first voltage line, a first scanning circuit 3, and multiple first scanning lines 5. The first scanning circuit 3 is electrically connected to the pixel circuit of the corresponding row via the corresponding first scanning line 5. The first voltage line is electrically connected to the pixel circuit, which responds to the pulse signal of the first scanning signal on the first scanning line 5 by writing the voltage on the first voltage line into the pixel circuit. During at least one frame refresh cycle, in a first time period, pulse signals with a first pulse width are simultaneously output to N first scanning lines 5, and in a second time period, pulse signals with a second pulse width are simultaneously output to M first scanning lines 5, where N and M are unequal positive integers; the first pulse width and the second pulse width are unequal. It can be understood that the pulse width of the pulse signal of the first scanning signal on the first scanning line 5 can control the duration for which the voltage on the first voltage line is written into the pixel circuit. A pulse signal with a first pulse width is output to N first scan lines 5, and a pulse signal with a second pulse width is output to M first scan lines 5. By setting the first pulse width and the second pulse width to be unequal, the duration of the voltage on the first voltage line input to the sub-pixels connected to the N first scan lines 5 can be made different from the duration of the voltage on the first voltage line input to the sub-pixels connected to the M first scan lines 5. The larger the pulse width of the first scan signal, the longer it takes to write the voltage on the first voltage line into the pixel circuit.

[0090] By configuring the first voltage line to provide an initialization voltage to at least the first electrode (e.g., the anode) of the light-emitting device, the first scan signal on the first scan line 5 controls the duration for which the initialization voltage is written into the pixel circuit. By outputting different pulse widths from the first scan lines 5 in different zones, during at least one frame refresh cycle, when the anode charging speed increases due to a decrease in the initialization voltage load, a pulse signal with a smaller pulse width is output to the corresponding connected first scan line 5, reducing the anode charging time of the light-emitting device; conversely, when the anode charging speed decreases due to a larger initialization voltage load, a pulse signal with a larger pulse width is output to the corresponding connected first scan line 5, increasing the anode charging time of the light-emitting device. This ensures that the charging voltage of the light-emitting device after anode initialization is consistent or approximately equal across different time periods within a frame, thereby improving the multi-screen problem caused by differences in the initialization voltage load across different time periods and enhancing the display effect of the display device.

[0091] The technical solution provided by this invention, within at least one screen refresh cycle, simultaneously outputs pulse signals with a first pulse width to N first scan lines in a first time period, and simultaneously outputs pulse signals with a second pulse width to M first scan lines in a second time period, where N and M are unequal positive integers; the first pulse width and the second pulse width are unequal. By outputting different pulse widths to the first scan lines in different areas, the charging voltage of the light-emitting devices after anode initialization is consistent or approximately equal in each time period within at least one screen refresh cycle, thereby improving the multi-screen problem caused by load differences in initialization voltage in different time periods and improving the display effect of the display device.

[0092] Based on the above embodiments, optionally, N is greater than M, and the first pulse width is greater than or less than the second pulse width, so that when driving fewer first scan lines 5 (equivalent to the second time period), a pulse signal with a smaller pulse width is output. Setting N to be greater than M and the first pulse width to be greater than the second pulse width can meet the requirements for solving the screen splitting problem of the display device. This is equivalent to the first time period outputting the first scan signal to more first scan lines 5 and providing initialization voltage to the first electrode (e.g., anode) of more light-emitting devices, and the second time period outputting the first scan signal to fewer first scan lines 5 and providing initialization voltage to the first electrode (e.g., anode) of fewer light-emitting devices. Therefore, the first time period has a large load, slow charging speed, larger first pulse width, and longer initialization charging time, while the second time period has a small load, fast charging speed, smaller first pulse width, and shorter initialization charging time, so that the charging voltage is consistent or approximately equal.

[0093] Based on the above embodiments, Figure 5 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention, for reference. Figure 5 Optionally, the first voltage line 4 is used to provide an initialization voltage; the pixel circuit includes a first initialization module 80, the control terminal of the first initialization driving module 80 is electrically connected to the first scan line 5, and the first initialization module 80 is connected between the first electrode of the corresponding light-emitting device 60 and the first voltage line 4; the first initialization module 80 is used to transmit the initialization voltage on the first voltage line 4 to the first electrode of the light-emitting device 60 to initialize the first electrode of the light-emitting device 60.

[0094] Optionally, the display panel includes n first zones 01 and m second zones 02 arranged alternately along a first direction. During a first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines 5 of the n first zones 01, and during a second time period, pulse signals with a second pulse width are simultaneously output to the first scan lines 5 of the m second zones 02, where n and m are unequal positive integers. In related technologies, the dark bands that cause screen splitting problems in display devices usually appear in the form of regions. Therefore, by setting the output of pulse signals with a first pulse width to the first scan lines of the n first zones 01 during the first time period and the output of pulse signals with a second pulse width to the first scan lines of the m second zones 02 during the second time period, the initialization time of the first electrode of the light-emitting device in the n first zones 01 can be different from the initialization time of the first electrode of the light-emitting device in the m second zones 02, thereby meeting the requirement of solving the screen splitting problem in the display device.

[0095] During the first time period, the activation pulses of the first scan signal are overlapped and output to n first zones 01 at intervals. During the first time period, the first scan signal is not output to m second zones 02. At one moment during the first time period, the first scan signal is output to one or more rows of pixel circuits in the same first zone 01.

[0096] During the second time period, the activation pulses of the first scan signal are overlapped and output to the m second zones 02 at intervals. During the second time period, the first scan signal is not output to the n first zones 01. At one moment during the second time period, the first scan signal is output to one or more rows of pixel circuits in the same second zone 02.

[0097] Optionally, the first direction intersects with, for example, the extension direction of the first scan line. Optionally, nm = 1.

[0098] Optionally, n is greater than m, and the first pulse width is greater than the second pulse width. The load is large in the first time period, the first pulse width is larger, and the initial charging time is longer. The load is small in the second time period, the first pulse width is smaller, and the initial charging time is shorter, so that the charging voltage is consistent or approximately equal.

[0099] Optionally, n is greater than m, and the first pulse width is less than the second pulse width. The larger the pulse width of the first scan signal, the more pixel circuit rows are written to the first voltage line at the same pulse position (e.g., pulse a, pulse b, or pulse c) at the same moment, and the more pixel circuit rows are initialized by the anode. The pulse width of the first scan signal corresponding to the region with a large number of pixels is set to be less than the pulse width of the first scan signal corresponding to the region with a small number of pixels, so that the load difference between the first and second time periods is consistent or approximately equal. Optionally, M = N. In the first time period, multiple rows of pixel circuits connected to the first scan line in the same first area may output pulse signals with the first pulse width. The pulse signals output by these multiple rows of pixel circuits partially overlap, partially stagger, and not completely coincide, equivalent to displacement or misalignment. In the second time period, multiple rows of pixel circuits connected to the first scan line in the same second area may output pulse signals with the second pulse width. The pulse signals output by these multiple rows of pixel circuits partially overlap, partially stagger, and not completely coincide, equivalent to displacement or misalignment.

[0100] Optionally, the pulse width of the pulse signal of the first scan signal is the duration of the conduction level of the first initialization module 80. In related technologies, the number of dark bands causing screen splitting problems in the display device is usually less than the number of normal display areas. The first area 01 can be a normal display area, and the second area 02 can be a dark area. The pulse width of the pulse signal of the first scan signal input to the first area 01 is greater than the pulse width of the pulse signal of the first scan signal input to the second area 02, which improves the overcharging problem in the second area 02 caused by the accelerated charging speed of the first electrode. This ensures that the charging voltage of the light-emitting devices after anode initialization is consistent or approximately equal in different time periods, thereby improving the multi-screen splitting problem caused by the load difference of the initialization voltage in different time periods and improving the display effect of the display device.

[0101] Based on the above embodiments, please continue to refer to Figure 5 Optionally, the display device may further include: sub-pixels, each sub-pixel comprising electrically connected pixel circuitry and light-emitting devices.

[0102] Optionally, the display device further includes: at least one voltage detection line 1, one end of which is electrically connected to the first electrode of the light-emitting device 60 of the sub-pixel, and the other end is connected to a detection module, so as to detect the voltage of the first electrode of the light-emitting device 60 through the detection module, and determine the second pulse width based on the detected first electrode voltage. The detection module 2 can be disposed in the display device or is an external detection device. Figure 5The schematic diagram of the detection module in the embodiment is a module in the display device. At least one voltage detection line 1 is provided in the display device. Based on the detected first electrode voltage, the charging time required for the first electrode of the light-emitting device 60 to charge to the target voltage value V1 during the initialization process is determined, and then the second pulse width is determined. This ensures that the charging voltage of the light-emitting device 60 after first electrode initialization is consistent or the difference is less than a preset value in each time period of each frame, thereby improving the multi-screen problem caused by load differences in initialization voltage in different time periods and improving the display effect of the display panel.

[0103] Optionally, the maximum refresh rate of the display device is less than the frequency of the first scan signal of the display device.

[0104] refer to Figure 6 A frame consists of an active phase and a vertical blanking phase. After one frame is finished, the display panel needs to prepare display data for the next frame. The duration of the vertical blanking phase can be used to prepare display data for the next frame.

[0105] When the display panel is at its maximum refresh rate, such as 120Hz, one refresh cycle (equivalent to one frame) consists only of write frames, with no hold frames. A write frame may include an active phase and a vertical blanking phase. The first time period is in the active phase, and the second time period is in the vertical blanking phase. A write frame may include a data write phase. Hold frames may have no data write phase.

[0106] When the display panel's refresh rate is lower than the maximum refresh rate, such as 60Hz, one refresh cycle (equivalent to one frame) can include a write frame and a hold frame. The hold frame can be located in the vertical blanking phase. Part of the write frame can be located in the active phase, and another part can be located in the vertical blanking phase.

[0107] Optionally, a screen refresh cycle includes an effective phase and a vertical blanking phase, with the first time period being in the effective phase and the second time period being in the vertical blanking phase.

[0108] Optionally, a screen refresh cycle includes a write frame, with the effective phase located in the write frame and at least a portion of the vertical blanking phase located in the write frame.

[0109] Optionally, a screen refresh cycle may also include a hold frame, with part of the vertical blanking phase occurring in the write frame and part of the vertical blanking phase occurring in the hold frame.

[0110] Optionally, the first electrode of the light-emitting device 60 is the anode, and the scanning signal on the first scan line 5 is the anode initialization control signal.

[0111] When the maximum refresh rate of the display device is less than the frequency of the anode initialization control signal of the display device; wherein, m second zones 02 are pulse width adjustment display zones; the second pulse width is the pulse width adjusted by the pulse width adjustment display zone. The pulse width adjustment display zone is the display zone where the anode-initialized sub-pixel is located when the pulse a of the anode initialization control signal SP2 of the display device scans to the Vblack zone of the vertical blanking phase in one frame of the display device, causing the number of pulses of the anode initialization control signal SP2 of the display area (Vactive zone) of the display device to decrease (equivalent to the second time period, for example, the Vactive zone has 2 pulses in the second zone).

[0112] Optionally, the detection module is used to detect the first electrode voltage of the light-emitting device located in the second region, determine the charging time required for the first electrode of the light-emitting device located in the second region to charge to the target voltage value during the initialization process based on the detected first electrode voltage of the light-emitting device, and adjust the initialization time of the first electrode of the light-emitting device located in the second region according to the required charging time.

[0113] n first zones 01 are non-pulse width adjustment display areas; the first pulse width is the pulse width of the pulse signal of the first scan signal corresponding to the non-pulse width adjustment display area; the non-pulse width adjustment display area is the display area where the sub-pixel of the anode initialization is located when the pulse of the anode initialization control signal of the display device has not scanned the Vblack area of ​​the vertical blanking stage in a frame of the display device (equivalent to the first time period, for example, the Vactive area has 3 first zones with pulses).

[0114] Specifically, at least one voltage detection line 1 is provided in the display device. Based on the detected anode voltage, the charging time required for the anode of the light-emitting device 60 to charge to the target voltage value V1 during the initialization process is determined. Therefore, when the display device is displaying, the anode initialization time of the light-emitting device via voltage detection line 1 can be adjusted according to the required charging time. This ensures that the charging voltage of the light-emitting device 60 after anode initialization is consistent or the difference is less than a preset value in each time period of each frame, thereby improving the multi-screen problem caused by load differences in initialization voltage in different time periods and improving the display effect of the display panel.

[0115] The pulse width adjustment display area refers to the display area where the anodized sub-pixels are located during the vertical blanking phase of a frame of the display device, when the pulse scan of the anodization control signal SP2 of the display device reaches the Vblack area. This reduces the number of pulses of the anodization control signal SP2 of the display area (Vactive area) of the display device (equivalent to a second time period, for example, the Vactive area has 2 pulses in the second area). The pulse width adjustment display area can be understood as... Figure 2 The display area where the Mura region is located, namely the second area 02.

[0116] Optionally, the second zone 02 is determined based on the reset frequency of the first electrode of the light-emitting device or the number of first pulses, and the ratio of the vertical blanking phase to the line scan time of the first scan signal (SP2) in one frame when the display device is at its maximum refresh rate. The line scan time of the first scan signal (SP2) can be the average time for initializing the first electrode of the light-emitting device of one row of pixel circuits, or the minimum interval between the start times of initializing the first electrodes of the light-emitting devices of two adjacent rows of pixel circuits. The line scan time of the first scan signal (SP2) can also be the minimum interval between the start times of the turn-on pulses of the first scan signal (SP2) corresponding to two adjacent rows of pixel circuits.

[0117] Optionally, the first pulse count is the number of start pulses of the first scan signal (SP2) received by a pixel circuit after the data writing phase of the pixel circuit within a frame (equivalent to a frame refresh cycle, including only write frames, without hold frames, also equivalent to write frames, also equivalent to write frames at a smaller refresh rate) when the screen refresh frequency is at the maximum refresh frequency.

[0118] Optionally, when the screen refresh rate is at its maximum refresh rate, the vertical blanking phase within a frame is the period between the output time of the pulse of the second scan signal SP1 corresponding to the last row of pixel circuits on the display panel in the current frame and the output time of the pulse of the second scan signal SP1 corresponding to the first row of pixel circuits on the display panel in the next frame; the second scan signal SP1 is used to control the writing of data voltage. Optionally, the number of first pulses is greater than or equal to 2. The number of first pulses can be equal to n.

[0119] Specifically, the number of second zones 02 in the display device is related to the first electrode reset frequency or the number of first pulses of the light-emitting device. The number of second zones 02 in the display panel can be determined based on the first electrode reset frequency of the light-emitting device and the maximum refresh rate of the display panel. The first electrode of the light-emitting device can be the anode, and the reset frequency of the first electrode of the light-emitting device in the display panel is the anode reset frequency of the light-emitting device. The anode reset frequency of the light-emitting device in the display panel can be understood as the frequency at which the first voltage line 4 inputs the initialization voltage to the anode of the light-emitting device to initialize the anode potential. It can be determined based on the number of times the first voltage line 4 inputs the initialization voltage to the anode of the light-emitting device to initialize the anode potential when the display panel is at its maximum refresh rate. Therefore, under normal circumstances, the anode reset frequency of the light-emitting device is related to the number of first pulses.

[0120] For example, refer to Figure 2Taking a maximum refresh rate of 120Hz as an example, if the anode reset frequency is 360Hz, the display panel will have two Mura regions under the driving method of the relevant technology, dividing the display device into three screens, that is, there are two second zones 02. If the anode reset frequency is 240Hz (equivalent to 2 first pulses), the display panel will have one Mura region under the driving method of the existing technology, dividing the display device into two screens, that is, there is one second zone 02. Based on the ratio of the vertical blanking phase to the row scanning time of the first scanning signal in one frame at the maximum refresh rate, this is equivalent to the number of pixel rows that the display device can scan in the Vblack area during the vertical blanking phase in one frame at the maximum refresh rate. The number of pixel rows in each second zone 02 is determined based on the number of pixel rows that the display device can scan in the Vblack area during the vertical blanking phase in one frame at the maximum refresh rate, which is also the size of the second zone 02 along the column direction. The duration of the vertical blanking phase in a frame at maximum refresh rate (equivalent to the duration of writing the frame minus the duration of the effective phase) can be set to a constant value. Then, the number of pixel rows that the display device can scan in the Vblank area during the vertical blanking phase in a frame at maximum refresh rate can be determined by the ratio t1' / t2' of the duration of the vertical blanking phase in a frame at maximum refresh rate to the duration t2' of the first scanning signal scanning one pixel. That is, the number of pixel rows in each brightness compensation area is t1' / t2'. Then, based on the sum of the number of pixel rows in the display area and the number of pixel rows that the display device can scan in the Vblack area during the vertical blanking phase in a frame at maximum refresh rate, the number of second area 02, and the number of pixel rows in second area 02, the position of each second area 02 in the display panel can be determined. Based on the reset frequency or the number of first pulses of the first electrode of the light-emitting device of the display panel, the number of brightness compensation areas in the display panel is determined. Based on the ratio of the vertical blanking phase to the line scanning time of the first scan signal in a frame at the maximum refresh rate of the display panel, the number of pixel rows in each brightness compensation area is determined. Based on the ratio of the pulse interval to the line scanning time of the first scan signal, the interval distance between two adjacent brightness compensation areas is determined. For example, the sum of the number of pixel rows x in the display area of ​​the display device and the ratio of the vertical blanking phase to the line scanning time of the first scan signal in a frame at the maximum refresh rate of the display device (equivalent to the number of pixel rows y that the vertical blanking phase in a frame at the maximum refresh rate of the display device can scan in the Vblank area), the number z of second areas 02 in the display panel, and the interval between two adjacent second areas 02 (equivalent to the number of pixel rows w in the second area) are used to determine the starting and ending number of pixel rows of each second area 02 in the display panel, thereby determining the position of each second area 02 in the display panel.The number of pixel rows w in multiple second zones 02 can be equal. The number of pixel rows y in multiple first zones 01 can be equal. For example, w+y=(x+y) / z. The image acquisition module can also acquire images of the display area of ​​the display panel to determine the location and number of brightness compensation areas.

[0121] Optionally, at least one voltage detection line 1 may include multiple voltage detection lines 1; multiple sub-pixel arrays are arranged, and the light-emitting devices 60 in the sub-pixels located in the same row are electrically connected to the same voltage detection line 1.

[0122] Specifically, the display device includes multiple pixel rows, and each sub-pixel in each row can be electrically connected to a voltage detection line 1. This allows adjustment of the first-stage initialization time of the row of light-emitting devices 60 electrically connected to each voltage detection line 1 based on the first-stage voltage detected by each row of sub-pixels. This further improves the multi-screen problem caused by load differences in initialization voltage across different time periods, thereby enhancing the display effect of the display device.

[0123] Based on the above embodiments, in one embodiment of the present invention, the absolute value of the difference between the first pulse width and the second pulse width is equal to the absolute value of the difference Δt between the first time period, the charging time t1 required for the first electrode of the light-emitting device in the first region 01 to be charged to the target voltage value V1 during the initialization process, and the charging time t2 required for the first electrode of the light-emitting device in the second region 02 to be charged to the target voltage value V1 during the initialization process.

[0124] Specifically, taking the first electrode of the light-emitting device as the anode as an example, when the pulse of the anode initialization control signal SP2 of the display device does not scan the Vblack area of ​​the vertical blanking stage in a frame between frames of the display device, it is equivalent to the first time period. For example, at this time, there are 3 pulses in the first area of ​​the Vactive area, and the anode initialization voltage V1 of the light-emitting device is used as the target voltage value. The absolute value of the difference between the first pulse width and the second pulse width (i.e., the adjustment time for the anode initialization of the light-emitting device in the second region 02) is equal to the first time period when the pulse of the anode initialization control signal SP2 of the display device does not scan the Vblack area of ​​the vertical blanking stage in a frame of the display device. For example, at this time, there are 3 pulses in the first region of the Vactive area. The charging time t1 required for the anode of the light-emitting device 60 to charge to the target voltage value V1 during the initialization process is equal to the second time period when the pulse of the anode initialization control signal SP2 scans to the Vblack area of ​​the vertical blanking stage in a frame of the display device, reducing the number of pulses in the effective display area of ​​the display device. For example, at this time, there are 2 pulses in the second region of the Vactive area. The difference Δt is the charging time t2 required for the anode of the light-emitting device 60 to charge to the target voltage value during the initialization process.

[0125] When the target voltage value is set and the pulse of the anode initialization control signal SP2 of the display device does not scan the Vblack area of ​​the vertical blanking stage in a frame of the display device, it is equivalent to the first time period. For example, at this time, there are 3 pulses in the first area of ​​the Vactive area. The voltage value reached by the anode of the light-emitting device 60 after charging during the initialization process is equal. This can make the charging voltage of the light-emitting device 60 after anode initialization consistent in each time period of each frame, solve the multi-screen problem caused by the load difference of the initialization voltage in different time periods, and further improve the display effect of the display device.

[0126] In conclusion, Figure 7 This is a schematic diagram of another anode initialization control signal pulse not entering the Vblank region provided by an embodiment of the present invention; it is equivalent to the first time period, for example, at this time there are 3 pulses in the first region of the Vactive region. Figure 8 This is a schematic diagram illustrating another anode initialization control signal pulse entering the Vblank region according to an embodiment of the present invention, equivalent to a second time period. For example, at this time, there are two pulses in the Vactive region. (Reference) Figure 7 and Figure 8 Simply put, when the pulse of the anode initialization control signal SP2 of the display device does not scan the Vblack area of ​​the vertical blanking phase in a frame of the display device, it is equivalent to the first time period. For example, at this time, there are 3 pulses in the first area of ​​the Vactive area, and the pulse width of the anode initialization control signal SP2 (the scan signal on the first scan line) of the VActive area in the display panel is the first pulse width D1; when the pulse of the anode initialization control signal SP2 of the display device scans the Vblack area of ​​the vertical blanking phase in a frame of the display device, it is equivalent to the second time period. For example, at this time, there are 2 pulses in the second area of ​​the Vactive area, and the pulse width of the anode initialization control signal SP2 (the first scan signal on the first scan line 5) of the VActive area in the display panel is adjusted to the second pulse width D2, which is equivalent to delaying the turn-on pulse and reducing the pulse width (combined with...). Figure 8 and Figure 9 As shown in the figure, this improves the multi-screen problem caused by load differences in initial voltage at different time periods.

[0127] Based on the above embodiments, in one embodiment of the present invention, please continue to refer to... Figure 5 The pixel circuit includes a first initialization transistor T7.

[0128] The first terminal of the first initialization transistor T7 is electrically connected to the first terminal of the light-emitting device 60; the second terminal of the first initialization transistor T7 is connected to the first voltage line; the gate of the first initialization transistor T7 is used to receive the first scan signal (SP2) on the first scan line.

[0129] The detection module 2 is used to scan the pulse of the first scan signal (SP2) on the first scan line 5 to the Vblack area of ​​the vertical blanking stage in a frame of the display device, so that when the number of pulses in the display area (Vactive area) of the display device is reduced, it is equivalent to the second time period, and the duration of the conduction level of the scan signal (SP2) on the first scan line 5 of the pulse width adjustment display area is shortened.

[0130] Specifically, the first initialization transistor T7 is turned on when the first scan signal (SP2) on the first scan line 5 is low, or the first initialization transistor T7 is turned on when the first scan signal (SP2) on the first scan line 5 is high. The display device may further include a first scanning circuit 3, which is used to adjust the high and low level timing of the first scan signal (SP2) on the first scan line 5 based on the timing control of the detection module 2.

[0131] For example, the first initialization transistor T7 is turned on when the first scan signal (SP2) on the first scan line 5 is low; Reference Figure 5 When the pulse of the scan signal on the first scan line 5 enters the Vblack area of ​​the vertical blanking stage in a frame of the display panel, the detection module 2, which is equivalent to the second time period, shortens the high-level signal of the first scan signal (SP2) on the first scan line 5 of the pulse width adjustment display area of ​​the display panel, so as to reduce the first pole initialization time of the light-emitting device 60 of the sub-pixel in the pulse width adjustment display area.

[0132] Taking the first electrode of the light-emitting device 60 as the anode as an example, Figure 9 This is a timing comparison diagram before and after the adjustment of the anode initialization control signal in the second time period provided by an embodiment of the present invention; Figure 10 This is a comparison diagram of the anode voltage change over time during the charging process of the light-emitting device before and after the anode initialization control signal enters the Vblank region, provided by an embodiment of the present invention. (Refer to...) Figure 9 and Figure 10 The shortened time Δt is equal to the charging time t1 required for the anode of the light-emitting device 60 to charge to the target voltage value v1 during the initialization process when the pulse of the anode initialization control signal SP2 of the display device does not scan to the Vblack area of ​​the vertical blanking stage in a frame of the display device, which is equivalent to the first time period (corresponding to curve e, t1 can be equivalent to the duration corresponding to the first pulse width), and the charging time t2 required for the anode of the light-emitting device 60 to charge to the target voltage value v1 during the initialization process when the pulse of the anode initialization control signal SP2 scans to the Vblack area of ​​the vertical blanking stage in a frame of the display device, reducing the number of pulses in the display area (Vactive area) of the display device, which is equivalent to the second time period (corresponding to curve f, t2 can be equivalent to the duration corresponding to the second pulse width).

[0133] In some embodiments of the present invention, the brightness of the display device can be measured when the pulse of the anode initialization control signal SP2 scans to the Vblack area of ​​the vertical blanking phase in a frame of the display device, which corresponds to the second time period, and the brightness difference of the display device when the pulse of the anode initialization control signal SP2 does not scan to the Vblack area of ​​the vertical blanking phase in a frame of the display device, which corresponds to the first time period. By continuously adjusting the pulse width after the pulse of the anode initialization control signal SP2 scans to the Vblack area of ​​the vertical blanking phase in a frame of the display device, the brightness of the display device when the pulse of the anode initialization control signal SP2 scans to the Vblack area of ​​the vertical blanking phase in a frame of the display device is the same as the brightness of the display device when the pulse of the anode initialization control signal SP2 does not scan to the Vblack area of ​​the vertical blanking phase in a frame of the display device, thereby determining the second pulse width.

[0134] Optional, please continue to refer to Figure 5 The pixel circuit also includes a driving module 10 and a second initialization module 40; the second initialization module 40 is electrically connected to a second or first terminal of the driving module 10; the control terminal of the second initialization module 40 is connected to a first scan signal (SP2); the driving module 10 is used to output a driving current to the light-emitting device 60. The second initialization module 40 can be used to transmit an initialization voltage VrefP to a second or first terminal of the driving module 10 to initialize the second or first terminal of the driving module 10.

[0135] Optionally, the pixel circuit also includes a data writing module 20 and a compensation module 30; the data writing module 20 is electrically connected to the first terminal of the driving module 10; the compensation module 30 is connected between the control terminal and the second terminal of the driving module 10. The control terminal of the data writing module can be connected to the second scan signal SP1. The data writing module 20 can be used to transmit data voltage to the first terminal of the driving module 10 during the data writing stage.

[0136] Optionally, the pixel circuit may also include a storage module 70 for storing the gate voltage of the driving transistor; and a third initialization module 50 for initializing the gate potential of the driving transistor.

[0137] For example, Figure 11 This is a circuit diagram of another pixel circuit provided in an embodiment of the present invention. Figure 5 and Figure 11 The difference lies in the fact that the second initialization module 40 is connected to different ends of the driver module 10. Figure 12 This is a timing diagram of a pixel circuit provided in an embodiment of the present invention; see reference. Figure 5 , Figure 11 and Figure 12The driving module 10 includes a driving transistor T1; the data writing module 20 includes a data writing transistor T2, whose conduction state is controlled by a second scan signal SP1; the compensation module 30 includes a compensation transistor T3, whose conduction state is controlled by a scan signal SN2; the first initialization module 80 includes a first initialization transistor T7, whose conduction state is controlled by an anode reset control signal SP2 (i.e., the first scan signal). When the first initialization transistor T7 is turned on, the initialization voltage Vref1 is input to the first electrode (e.g., the anode) of the light-emitting device; the second initialization module 40 includes a second initialization transistor T8, which shares the same control signal as the first initialization module 80. The light-emitting device 60 is an OLED light-emitting device; the storage module 70 includes a storage capacitor Cst. The third initialization module 50 includes a third initialization transistor T4, whose conduction state is controlled by a scan signal SN1. In the write frame, there is a gate initialization stage of the driving transistor T1 (not shown), a data writing stage w1, a first initialization stage h1, a second initialization stage h2, and a third initialization stage h3 of the first electrode of the light-emitting device after the data writing stage w1. For example, combined with Figure 7 and Figure 12 In the first period Figure 7 The first region 01 at the top can be equated to the third initialization phase h3, the first region 01 in the middle can be equated to the second initialization phase h2, and the first region 01 at the bottom can be equated to the first initialization phase h1. (Combined...) Figure 8 and Figure 12 In the second period, Figure 8 The upper second region 02 in the middle can be equivalent to the third initialization stage h3, and the lower second region 02 can be equivalent to the second initialization stage h2.

[0138] Optionally, the pixel circuit may also include a first light-emitting control module 91 and / or a second light-emitting control module 92. The first light-emitting control module 91 is connected between the first power supply and the first terminal of the driving module 10; the second light-emitting control module 92 is connected between the second terminal of the driving module 10 and the first electrode (e.g., anode) of the light-emitting device 60. The control terminals of the first and second light-emitting control modules 91 receive the same light-emitting control signal EM. The first light-emitting control module 91 includes a first light-emitting control transistor T5, and the second light-emitting control module 92 includes a second light-emitting control transistor T6. In the write frame, after each initialization of the first electrode of the light-emitting device, a light-emitting phase is also included. The transistors used in this embodiment can all be thin-film transistors, field-effect transistors, or other devices with similar characteristics.

[0139] Transistors T1 to T8 can be N-type transistors or P-type transistors. Figure 11 For example, transistors T3 and T4 are N-type transistors, and the rest are P-type transistors.

[0140] Based on the above embodiments, in one embodiment of the present invention, the detection module 2 includes:

[0141] The detection submodule is used to receive the first electrode voltage of the light-emitting device 60 detected by the voltage detection line 1, and determine the charging time required for the first electrode of the light-emitting device 60 to charge to the target voltage value during the initialization process based on the first electrode voltage of the light-emitting device 60.

[0142] The timing control submodule is used to adjust the initialization time of the first electrode of the light-emitting device 60, which is electrically connected to the voltage detection line 1, according to the required charging time.

[0143] Specifically, the detection module includes a detection submodule and a timing control submodule. The detection submodule receives the first electrode voltage of the light-emitting device 60 detected by voltage detection line 1 during the training phase before the display device begins displaying, and determines the charging time required for the first electrode of the light-emitting device 60 to charge to the target voltage value during initialization based on the first electrode voltage. The timing control submodule adjusts the initialization time of the first electrode of the light-emitting device 60, which is electrically connected to voltage detection line 1, according to the required charging time when the display device begins displaying, which is equivalent to adjusting the pulse width of the pulse signal of the first scan signal. The detection module 2 includes multiple voltage detection ports, and the number of voltage detection lines 1 is multiple; each voltage detection line 1 is electrically connected to a corresponding voltage detection port, allowing the detection module to obtain the first electrode voltage of the light-emitting device 60 detected by each voltage detection line 1.

[0144] This invention also provides a driving method for a display device, used to drive the display device provided in any of the above embodiments. The driving method for the display device includes:

[0145] During at least one frame refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines.

[0146] During the second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines, where N and M are positive integers; the first pulse width and the second pulse width are not equal.

[0147] Specifically, N and M can be unequal positive integers. The first scan signal on the first scan line can control the duration of the voltage on the first voltage line being written into the pixel circuit. Pulse signals with a first pulse width are output to N first scan lines, and pulse signals with a second pulse width are output to M first scan lines. By setting the first pulse width and the second pulse width to be unequal, the duration of the voltage input to the first voltage line of the sub-pixels connected to the N first scan lines can be made different from the duration of the voltage input to the first voltage line of the sub-pixels connected to the M first scan lines.

[0148] By configuring the first voltage line to provide an initialization voltage to at least the first electrode (e.g., the anode) of the light-emitting device, the first scan signal on the first scan line controls the duration for which the initialization voltage is written into the pixel circuit. By outputting different pulse widths from the first scan lines in different zones, within at least one frame refresh cycle, when the initialization voltage load decreases and the anode charging speed increases, a pulse signal with a smaller pulse width is output to the corresponding connected first scan line, reducing the anode charging time of the light-emitting device; conversely, when the initialization voltage load increases and the anode charging speed decreases, a pulse signal with a larger pulse width is output to the corresponding connected first scan line, increasing the anode charging time of the light-emitting device. This ensures that the charging voltage of the light-emitting device after anode initialization is consistent or approximately equal across different time periods within a frame, thereby improving the multi-screen problem caused by differences in the initialization voltage load across different time periods and enhancing the display effect of the display device.

[0149] Optionally, N is greater than M, and the first pulse width is greater than the second pulse width; the first voltage line is used to provide the initialization voltage; the pixel circuit includes a first initialization module, the control terminal of the first initialization module is electrically connected to the first scan line, and the first initialization module is connected between the first electrode of the corresponding light-emitting device and the first voltage line; the display area of ​​the display panel includes n first areas and m second areas arranged alternately along the first direction.

[0150] In the first time period, pulse signals with a first pulse width are simultaneously output to N first scan lines, including:

[0151] The driver module is initialized to simultaneously output pulse signals with a first pulse width to the first scan lines of the n-interval first regions.

[0152] In the second time period, pulse signals with a second pulse width are simultaneously output to M first scan lines, including: simultaneously outputting pulse signals with a second pulse width to the first scan lines of m intervals in the second region, where n and m are unequal positive integers; the first direction intersects with the extension direction of the first scan line, for example, perpendicularly.

[0153] Optional, n is greater than m, and the first pulse width is greater than the second pulse width;

[0154] Optionally, the pulse width of the pulse signal of the first scan signal is the duration of the conduction level of the first initialization module.

[0155] Optionally, the display device further includes at least one voltage detection line, one end of which is electrically connected to the first electrode of the light-emitting device of the sub-pixel, and the other end is connected to the detection module; the driving method of the display device further includes:

[0156] Obtain the first electrode voltage of the light-emitting device detected by the voltage detection line;

[0157] The second pulse width is determined based on the voltage feedback from the first electrode of the voltage detection line.

[0158] Optionally, the maximum refresh rate of the display device is less than the frequency of the first scan signal of the display device;

[0159] The second pulse width is determined based on the first electrode voltage of the light-emitting device fed back from the voltage detection line, including:

[0160] Within a preset screen refresh cycle (e.g., the pre-shipment debugging phase), in the first time period, pulse signals with the first pulse width are simultaneously output to the first scan lines corresponding to n intervals of the first zone, and in the second time period, pulse signals with the first pulse width are simultaneously output to the first scan lines corresponding to m intervals of the second zone.

[0161] Based on the voltage of the first electrode of the light-emitting device fed back by the voltage detection line, determine the charging time required for the first electrode of the light-emitting device in the second region to be charged to the target voltage value during the initialization process.

[0162] The second pulse width is determined based on the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process.

[0163] Optionally, determining the second pulse width based on the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process includes:

[0164] The second pulse width is determined based on the difference between the charging time required for the first electrode of the light-emitting device in the first area to charge to the target voltage value V1 during the initialization process of the first time period within the preset screen refresh cycle and the charging time required for the first electrode of the light-emitting device in the second area to charge to the target voltage value V1 during the initialization process of the second time period.

[0165] Optionally, the first electrode of the light-emitting device is the anode, and the scanning signal on the first scan line is the anode initialization control signal.

[0166] Optionally, based on the voltage of the first electrode of the light-emitting device fed back from the voltage detection line, before determining the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process, the following steps are included:

[0167] The target voltage value is determined based on the initial voltage of the first electrode of the light-emitting device in the first time period;

[0168] The absolute value of the difference between the first pulse width and the second pulse width is equal to the absolute value of the difference between the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process in the first time period and the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process in the second time period.

[0169] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display device, characterized in that, include: Multiple pixel circuits arranged in an array; A first scanning circuit and multiple first scanning lines, wherein the first scanning circuit is electrically connected to the pixel circuit of the corresponding row via the corresponding first scanning line; The first voltage line is electrically connected to the pixel circuit, and the pixel circuit is used to write the voltage on the first voltage line into the pixel circuit in response to the pulse signal of the first scan signal on the first scan line. During at least one frame refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to N of the first scan lines, and in the second time period, pulse signals with a second pulse width are simultaneously output to M of the first scan lines, where N and M are positive integers. The first pulse width is not equal to the second pulse width; The display device further includes: Sub-pixel, including the pixel circuit and light-emitting device electrically connected; At least one voltage detection line, one end of which is electrically connected to the first electrode of the light-emitting device of the sub-pixel, and the other end is connected to a detection module, so as to detect the voltage of the first electrode of the light-emitting device through the detection module, and determine the second pulse width based on the detected voltage of the first electrode of the light-emitting device; The maximum refresh rate of the display device is less than the frequency of the pulse signal of the first scan signal of the display device; The screen refresh cycle includes an effective phase and a vertical blanking phase. The first time period is located in the effective phase, and the second time period is located in the vertical blanking phase.

2. The display device according to claim 1, characterized in that, N and M are unequal positive integers, N is greater than M, and the first pulse width is greater than the second pulse width.

3. The display device according to claim 1, characterized in that, The first voltage line is used to provide an initialization voltage; the pixel circuit includes a first initialization module, the control terminal of the first initialization module is electrically connected to the first scan line, and the first initialization module is connected between the first electrode of the corresponding light-emitting device and the first voltage line; The display panel includes n first zones and m second zones arranged alternately along a first direction. During a first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to the n spaced first zones. During a second time period, pulse signals with a second pulse width are simultaneously output to the first scan lines corresponding to the m spaced second zones. n and m are unequal positive integers. The first direction intersects with the extension direction of the first scan lines.

4. The display device according to claim 3, characterized in that, n is greater than m, and the first pulse width is greater than or less than the second pulse width.

5. The display device according to claim 4, characterized in that, nm=1.

6. The display device according to claim 3, characterized in that, The pulse width of the first scan signal is equal to the duration of the conduction level of the first initialization module.

7. The display device according to claim 1, characterized in that, A screen refresh cycle includes a write frame, an effective phase located in the write frame, and at least a partial vertical blanking phase located in the write frame.

8. The display device according to claim 7, characterized in that, A screen refresh cycle also includes a hold frame, with a portion of the vertical blanking phase located in the write frame and a portion of the vertical blanking phase located in the hold frame.

9. The display device according to claim 3, characterized in that, The detection module is used to detect the voltage of the first electrode of the light-emitting device located in the second region, determine the charging time required for the first electrode of the light-emitting device located in the second region to charge to the target voltage value during the initialization process based on the detected voltage of the first electrode of the light-emitting device, and adjust the initialization time of the first electrode of the light-emitting device located in the second region according to the required charging time.

10. The display device according to claim 3, characterized in that, The second region is determined based on the first electrode reset frequency or the number of first pulses of the light-emitting device of the display device, and the ratio of the vertical blanking phase to the row scanning time of the first scanning signal in a frame when the screen refresh rate is at the maximum refresh rate. The number of first pulses is the number of turn-on pulses of the first scanning signal received by a pixel circuit after the data writing phase of the pixel circuit in a frame when the screen refresh rate is at the maximum refresh rate. The vertical blanking phase in a frame when the screen refresh rate is at the maximum refresh rate is the phase between the output time of the pulse of the second scanning signal corresponding to the last row of pixel circuits of the display panel in the current frame and the output time of the pulse of the second scanning signal corresponding to the first row of pixel circuits of the display panel in the next frame when the screen refresh rate is at the maximum refresh rate. The second scanning signal is used to control the writing of data voltage.

11. The display device according to claim 10, characterized in that, The number of the first pulses is greater than or equal to 2; the number of the first pulses is equal to n.

12. The display device according to claim 1, characterized in that, At least one voltage detection line includes multiple voltage detection lines; multiple sub-pixel arrays are arranged, and the light-emitting devices in the sub-pixels located in the same row are electrically connected to the same voltage detection line.

13. The display device according to claim 3, characterized in that, The absolute value of the difference between the first pulse width and the second pulse width is equal to the absolute value of the difference between the charging time required for the first electrode of the light-emitting device in the first region to charge to the target voltage value during the initialization process in the first time period and the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process in the second time period.

14. The display device according to claim 1, characterized in that, The pixel circuit further includes a driving module and a second initialization module; the second initialization module is electrically connected to a second or first terminal of the driving module; the control terminal of the second initialization module is connected to the first scanning signal; the driving module is used to output driving current to the light-emitting device.

15. The display device according to claim 14, characterized in that, The pixel circuit further includes a data writing module and a compensation module; the data writing module is electrically connected to the first terminal of the driving module; the compensation module is connected between the control terminal and the second terminal of the driving module.

16. The display device according to claim 1, characterized in that, The detection module includes: The detection submodule is used to receive the first electrode voltage of the light-emitting device detected by the voltage detection line, and determine the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process based on the first electrode voltage of the light-emitting device. The timing control submodule is used to adjust the initialization time of the first electrode of the light-emitting device electrically connected to the voltage detection line according to the required charging time.

17. The display device according to claim 1, characterized in that, The detection module includes multiple voltage detection ports and multiple voltage detection lines; each voltage detection line is electrically connected to one of the voltage detection ports.

18. A driving method for a display device, characterized in that, For driving the display device according to any one of claims 1 to 17; the driving method includes: During at least one screen refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to N of the first scan lines. During the second time period, pulse signals with a second pulse width are simultaneously output to M of the first scan lines, where N and M are positive integers; the first pulse width and the second pulse width are not equal. The display device further includes at least one voltage detection line, one end of which is electrically connected to the first electrode of the light-emitting device of the sub-pixel, and the other end is connected to the detection module; the driving method further includes: Obtain the first electrode voltage of the light-emitting device detected by the voltage detection line; The second pulse width is determined based on the first electrode voltage of the light-emitting device fed back by the voltage detection line.

19. The driving method for a display device according to claim 18, characterized in that, N and M are unequal positive integers, N is greater than M, and the first pulse width is greater than the second pulse width.

20. The driving method for the display device according to claim 18, characterized in that, The first voltage line is used to provide the initialization voltage; The pixel circuit includes a first initialization module; the control terminal of the first initialization module is electrically connected to the first scan line, and the first initialization module is connected between the first electrode of the corresponding light-emitting device and the first voltage line; The display panel includes n first zones and m second zones arranged alternately along a first direction. In the first time period, pulse signals with a first pulse width are simultaneously output to N of the first scan lines, including: During the first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to the n first regions at intervals; In the second time period, pulse signals with a second pulse width are simultaneously output to M of the first scan lines, including: During the second time period, pulse signals with a second pulse width are simultaneously output to the first scan lines corresponding to the m second zones at intervals, where n and m are unequal positive integers; the first direction intersects with the extension direction of the first scan line.

21. The driving method for a display device according to claim 20, characterized in that, n is greater than m, and the first pulse width is greater than the second pulse width.

22. The driving method for a display device according to claim 20, characterized in that, The pulse width of the first scan signal is equal to the duration of the conduction level of the first initialization module.

23. The driving method for a display device according to claim 20, characterized in that, The maximum refresh rate of the display device is less than the frequency of the first scan signal of the display device; The second pulse width is determined based on the first electrode voltage of the light-emitting device fed back by the voltage detection line, including: Within a preset screen refresh cycle, in the first time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to n intervals of the first zone, and in the second time period, pulse signals with a first pulse width are simultaneously output to the first scan lines corresponding to m intervals of the second zone. Based on the first electrode voltage of the light-emitting device fed back by the voltage detection line, determine the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process. The second pulse width is determined based on the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process.

24. The driving method for the display device according to claim 23, characterized in that, The second pulse width is determined based on the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process, including: The second pulse width is determined based on the difference between the charging time required for the first electrode of the light-emitting device in the first area to charge to the target voltage value during the initialization process of the first time period and the charging time required for the first electrode of the light-emitting device in the second area to charge to the target voltage value during the initialization process of the second time period within a preset screen refresh cycle.

25. The driving method for the display device according to claim 18, characterized in that, The first electrode of the light-emitting device is the anode, and the scanning signal on the first scan line is the anode initialization control signal.

26. The driving method for the display device according to claim 23, characterized in that, Based on the voltage of the first electrode of the light-emitting device fed back by the voltage detection line, before determining the charging time required for the first electrode of the light-emitting device in the second region to charge to the target voltage value during the initialization process, the following steps are taken: The target voltage value is determined based on the initialization voltage of the first electrode of the light-emitting device in the first time period. Wherein, the absolute value of the difference between the first pulse width and the second pulse width is equal to the absolute value of the difference between the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process in the first time period and the charging time required for the first electrode of the light-emitting device to charge to the target voltage value during the initialization process in the second time period.

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