Display panel, preparation method thereof and display device

Abstract

The application discloses a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a pixel structure and a scanning driving circuit. The pixel structure is electrically connected with the scanning driving circuit. In the direction perpendicular to the plane where the substrate is located, the pixel structure and the scanning driving circuit are located on opposite sides of the substrate. The technical scheme of the embodiment of the application can improve the screen-to-body ratio of the display panel and the design flexibility of the scanning driving circuit.

Description

A display panel, its manufacturing method, and a display device. Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, its manufacturing method, and a display device. Background Technology

[0002] With the development of display technology, full-screen mobile phones are increasingly favored by users. However, in existing display panels, the driving circuits used to drive pixels to emit light are usually set in the bezel area (non-display area) around the display area, which affects the screen ratio (i.e. the proportion of the display area in the entire screen) and makes it difficult to achieve a full screen. In addition, although the driving circuits of different display screen models have similar functions, they need to be designed and drawn according to the actual size of the screen, resulting in poor design flexibility of the driving circuits. Summary of the Invention

[0003] This invention provides a display panel and its manufacturing method, as well as a display device, to improve the screen-to-body ratio of the display panel and the design flexibility of the scanning drive circuit.

[0004] In a first aspect, the present invention provides a display panel, comprising: a substrate, a pixel structure, and a scanning driving circuit;

[0005] The pixel structure is electrically connected to the scan driving circuit; along a direction perpendicular to the plane of the substrate, the pixel structure and the scan driving circuit are located on opposite sides of the substrate.

[0006] Secondly, based on the same inventive concept, the present invention provides a method for preparing a display panel, used to prepare the display panel provided in any embodiment of the present invention, the method comprising:

[0007] Provide substrate;

[0008] A scanning drive circuit is fabricated on one side of the substrate;

[0009] Pixel structures are fabricated on the side of the substrate away from the scanning drive circuit;

[0010] The pixel structure is electrically connected to the scan drive circuit.

[0011] Thirdly, based on the same inventive concept, the present invention also provides a display device, which includes the display panel provided in any embodiment of the present invention.

[0012] The technical solution of this invention, by setting the pixel structure and the scanning driving circuit to be located on opposite sides of the substrate along a direction perpendicular to the plane of the substrate, can reduce the area occupied by the non-display area, thereby increasing the screen ratio. In addition, it can make the design of the scanning driving circuit almost unrestricted by factors such as screen size, thus improving the design flexibility of the scanning driving circuit.

[0013] 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

[0014] 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.

[0015] Figure 1 is a top view of a display panel according to an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the cross-sectional structure of the display panel taken along BB' in Figure 1;

[0017] Figure 3 is a top view of another display panel provided in an embodiment of the present invention;

[0018] Figure 4 is a top view of another display panel provided in an embodiment of the present invention;

[0019] Figure 5 is a top view of another display panel provided in an embodiment of the present invention;

[0020] Figure 6 is a top view of another display panel provided in an embodiment of the present invention;

[0021] Figure 7 is a schematic diagram of another display panel provided in an embodiment of the present invention;

[0022] Figure 8 is a circuit diagram of a pixel circuit in the display panel shown in Figure 7;

[0023] Figure 9 is the driving timing diagram of the pixel circuit shown in Figure 8;

[0024] Figure 10 is a schematic diagram of a scanning driving circuit in a display panel provided in an embodiment of the present invention;

[0025] Figure 11 is a schematic diagram of another structure of the scanning driving circuit in the display panel provided in an embodiment of the present invention;

[0026] Figure 12 is a schematic diagram of another structure of the scanning driving circuit in the display panel provided in an embodiment of the present invention;

[0027] Figure 13 is a schematic diagram of another structure of the scanning driving circuit in the display panel provided in an embodiment of the present invention;

[0028] Figure 14 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present invention;

[0029] Figure 15 is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0030] 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.

[0031] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0032] First, it should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "comprising" and similar terms mean that the element or object preceding the word encompasses the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes. Furthermore, the shapes and sizes of the components in the accompanying drawings do not reflect actual proportions and are only intended to illustrate the content of this invention.

[0033] Figure 1 is a top view of a display panel according to an embodiment of the present invention, and Figure 2 is a cross-sectional view of the display panel taken along BB' in Figure 1. Referring to Figures 1 and 2, the display panel 100 provided in this embodiment includes a substrate 10, a pixel structure P, and a scanning driving circuit. The pixel structure P is electrically connected to the scanning driving circuit. Along a direction perpendicular to the plane of the substrate 10, the pixel structure P and the scanning driving circuit are located on opposite sides of the substrate 10. In other words, the film layer containing the pixel structure P and the film layer containing the scanning driving circuit are located on opposite sides of the substrate 10. For example, in Figure 2, the label "20" represents the relevant film layer containing the pixel structure P, and the label "30" represents the relevant film layer containing the scanning driving circuit. As shown in Figure 2, along a direction perpendicular to the plane of the substrate 10, the relevant film layer 20 containing the pixel structure P and the relevant film layer 30 containing the scanning driving circuit are located on opposite sides of the substrate 10.

[0034] In this context, pixel structure refers to the sub-pixels / sub-pixels in a display panel. Taking a color display as an example, the display panel can include at least two types of sub-pixels with different emission colors, such as red sub-pixels, green sub-pixels, and blue sub-pixels, with one sub-pixel corresponding to one pixel structure.

[0035] The display panel provided in this embodiment of the invention can be any type of display panel known to those skilled in the art, including but not limited to liquid crystal display panels (LCDs) and light-emitting diode display panels (such as OLEDs). The specific structure of the pixel structure differs for different types of display panels. For example, taking an LCD panel as an example, it does not emit light itself and requires a backlight module to provide a backlight source to achieve display. The LCD panel mainly functions to adjust the brightness of each pixel structure. Specifically, an LCD panel typically includes an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate. The array substrate has circuit structures (mainly composed of thin-film transistors) corresponding to the pixel structures. Different electric fields can be applied to the liquid crystal in corresponding areas through the circuit structures to control the deflection angle of the liquid crystal and thus control the brightness of the pixel structure. The color filter substrate mainly uses the filtering effect of its color filter layer (composed of various colors of color resists) to make different pixel structures emit different colors, achieving color display. Therefore, in an LCD panel, a pixel structure can be understood as mainly composed of the circuit structure on the array substrate, the color resists on the color filter substrate, and the corresponding liquid crystal, while also requiring a backlight provided by a backlight module to emit light. Furthermore, taking OLED display panels as an example, the pixel structure mainly consists of organic light-emitting diodes (OLEDs) and corresponding pixel circuits (circuit structures). The pixel circuits control the current flowing through the OLEDs, driving them to emit light and controlling their brightness. For instance, a pixel circuit can be composed of several thin-film transistors (TFTs) and capacitors, such as the commonly used 7T1C circuit. Here, "T" represents a thin-film transistor, and "C" represents a capacitor.

[0036] Furthermore, as shown in Figure 1, the display panel 100 also includes multiple scan lines G and multiple data lines D, and each pixel structure P is electrically connected to the corresponding scan line G and data line D. Specifically, the aforementioned circuit structure in the pixel structure P is electrically connected to the scan line G and data line D respectively. Scan signals can be transmitted to the circuit structure through the scan line G, so that the pixel structures in the display panel are in a scanning state in a certain order. Data voltage signals can be transmitted to the circuit structure in the scanning state through the data line D, thereby controlling the brightness of the pixel structure.

[0037] In this embodiment, the scan driving circuit refers to the driving circuit used to transmit scan signals to the pixel structure P through the scan line G. Specifically, both the scan driving circuit and the data line D are electrically connected to the driving chip. The driving chip can transmit scan signals to each scan line G sequentially through the scan driving circuit, and transmit data voltage signals to the pixel structure in the scanning state through the data line D, thereby controlling the brightness of the pixel structure. Given that the display principle of the display panel is a relatively conventional technology, it will not be elaborated further here.

[0038] In traditional solutions, the scanning drive circuit is usually located on the left and / or right bezel areas of the display area, which makes it difficult to improve the screen ratio and the design flexibility of the scanning drive circuit is poor. As shown in Figure 2, in this embodiment of the invention, the film layer (20) where the pixel structure is located and the film layer (30) where the scanning drive circuit is located are located on opposite sides of the substrate 10 along a direction perpendicular to the plane of the substrate 10. That is, the scanning drive circuit is fabricated on the back side of the substrate 10. On the one hand, this can reduce the area occupied by the scanning drive circuit, that is, the area occupied by the non-display area, and improve the screen ratio. On the other hand, the design of the scanning drive circuit is almost not limited by factors such as screen size, thus improving the design flexibility of the scanning drive circuit.

[0039] It should be noted that Figure 2 is only illustrated by showing that the scanning drive circuits are provided on both the left and right sides of the back surface of the substrate 10. This arrangement helps to improve the voltage uniformity of the scanning signal at different positions on the scanning line, thus ensuring the display effect. In other embodiments, the scanning drive circuit may be provided only on one edge of the back surface of the substrate 10, and this embodiment of the present invention does not limit this. By placing the scanning drive circuit in the edge region of the substrate, it is convenient to electrically connect the scanning drive circuit to the scanning line.

[0040] In summary, by setting the pixel structure and the scanning drive circuit to be located on opposite sides of the substrate along a direction perpendicular to the plane of the substrate, the embodiments of the present invention can reduce the area occupied by the non-display area, thereby increasing the screen ratio. In addition, the design of the scanning drive circuit is almost unrestricted by factors such as screen size, thus improving the design flexibility of the scanning drive circuit.

[0041] Referring to Figures 1 and 2, optionally, the display panel 100 further includes a first flexible circuit board 40; the pixel structure P is electrically connected to the scan line G; the scan line G and the scan driving circuit are electrically connected through the first flexible circuit board 40. The flexible circuit board is easy to bend. In this embodiment, the scan line G and the scan driving circuit located on the upper and lower sides of the substrate 10 are electrically connected through the first flexible circuit board 40, making implementation relatively simple. Of course, other types of connectors can also be used to achieve the electrical connection between the scan line and the scan driving circuit; this embodiment of the invention does not limit this.

[0042] For example, Figure 3 is a top view of another display panel provided in an embodiment of the present invention. For ease of understanding, the scan driving circuit 31 and the pixel structure P are shown in the same view (the same below). Referring to Figure 3, in a specific implementation, the output terminal of the scan driving circuit 31 can be wired to the edge of the display panel, and a corresponding pad (such as the first pad 51) can be set at the edge to connect with it. Similarly, the scan line G can be wired to the edge of the display panel, and a corresponding pad (such as the second pad 52) can be set at the edge to connect with it. Then, through a bonding process, the first flexible circuit board 40 is electrically connected to the second pad 52 corresponding to the scan line G and the first pad 51 corresponding to the output terminal of the scan driving circuit 31, respectively, so as to realize the electrical connection between the scan line and the scan driving circuit.

[0043] Figure 4 is a top view of another display panel provided in an embodiment of the present invention. As shown in Figure 4, optionally, multiple pixel structures P electrically connected to the same scan line G constitute a pixel group 21; the scan driving circuit 31 includes multiple scan driving units 310, each scan driving unit 310 including multiple cascaded shift register modules 311; the maximum number of drive groups for the pixel group 21 by the scan driving unit 310 is N groups, where N is a positive integer and N is less than the total number of pixel groups 21; the total number of shift register modules 311 in the scan driving circuit 31 is greater than the total number of pixel groups 21, and some of the shift register modules 311 in the scan driving circuit 31 are electrically connected to the scan line G.

[0044] In different types of display panels, the connection between pixel structures and scan lines varies. A pixel structure may be electrically connected to only one scan line, or it may be electrically connected to multiple scan lines that transmit different scan signals simultaneously. Therefore, the multiple pixel structures P electrically connected to the same scan line G constitute a pixel group 21. This can be understood as follows: for any scan line transmitting a scan signal, multiple pixel structures P electrically connected to the same scan line G and capable of simultaneously receiving the scan signal transmitted by that scan line G constitute a pixel group 21.

[0045] It should be noted that Figure 4 is only used as an example to illustrate that multiple pixel structures P in the same row are electrically connected to the same scan line G to form a pixel group 21. In other embodiments, multiple rows (at least two rows) of pixel structures P can be electrically connected to the same scan line G, and the multiple rows of pixel structures P can form a pixel group. This embodiment of the present invention does not limit this.

[0046] Furthermore, the maximum number of pixel groups driven by the aforementioned scan driving unit 310 can be understood as the maximum number of pixel groups 21 that one scan driving unit 310 can drive. The maximum number of driving groups is N groups; in other words, one scan driving unit 310 can provide scan signals to at most N pixel groups 21. For the entire scan driving circuit 31, the maximum number of pixel groups 21 that it can drive is the sum of the maximum number of driving groups of each scan driving unit 310.

[0047] Furthermore, the scan driving unit 310 can sequentially transmit scan signals to multiple pixel groups 21 through multiple cascaded shift register modules 311, thereby enabling sequential scanning of multiple pixel groups 21. Therefore, the maximum number of driving groups in the scan driving unit 310 is related to the number of shift register modules 311 contained in the scan driving unit 310. Specifically, the number of shift register modules 311 in a scan driving unit 310 is greater than or equal to the maximum number of driving groups in the scan driving unit 310. This will be illustrated later with examples of different types of display panels, and will not be elaborated here. For the entire scan driving circuit 31, the total number of shift register modules 311 is the sum of the number of shift register modules 311 in each scan driving unit 310.

[0048] It should be noted that the number of shift register modules 311 in each scanning drive unit 310 may be equal or unequal, and the embodiments of the present invention do not limit this.

[0049] Furthermore, for display panels with different resolutions, the number of pixel rows varies, resulting in different numbers of pixel groups. In the conventional design of the scan drive circuit, a corresponding number of cascaded shift register modules need to be designed for each pixel group to achieve sequential scanning of each pixel group. Thus, for display panels with different resolutions, the scan drive circuit needs to be redesigned and redrawn, and different photomasks need to be used for etching, resulting in high production costs, poor practicality, and long product design cycles. To solve this problem, in this embodiment of the invention, referring to Figure 4, the total number of shift register modules 311 in the scan drive circuit 31 is set to be greater than the total number of pixel groups 21, and only some of the shift register modules 311 in the entire scan drive circuit 31 are electrically connected to the scan line G to transmit scan signals to the scan line G (the output terminals of the remaining shift register modules 311 are in a suspended state). With this configuration, the maximum number of pixel groups 21 that the entire scanning drive circuit 31 can drive is greater than the actual total number of pixel groups 21 in the display panel. In this case, only a portion of the shift register modules 311 need to be selected to scan the pixel groups 21. This allows the same scanning drive circuit design to adapt to display panel designs with different resolutions, improving product usability and reducing design cycle and production costs.

[0050] For example, referring to Figures 3 and 4, taking a pixel structure P electrically connected to a scan line G, and multiple pixel structures P in the same row forming a pixel group 21 as an example, in this case, a shift register module 311 can be electrically connected to the scan line G corresponding to a pixel group 21 to realize the transmission of scan signals. Comparing Figures 4 and 3, with the scan driving circuit 31 disposed on the back side of the substrate, compared to Figure 3 where each shift register module 311 in the scan driving circuit 31 is electrically connected to the scan line G, the embodiment of the present invention (referring to Figure 4) divides the scan driving circuit 31 into multiple scan driving units 310, each scan driving unit 310 containing multiple shift register modules 311. Furthermore, the total number of shift register modules 311 in the entire scan driving circuit 31 is greater than the total number of pixel groups 21. Thus, only a portion of the shift register modules 311 in the scan driving circuit 31 need to be electrically connected to the scan line G to perform normal scanning. Moreover, for display panels with different resolutions, only different numbers of shift register modules 311 in the scan driving circuit 31 need to be electrically connected to the scan line G. This solution can simultaneously meet the needs of multiple display panels with different resolutions by designing and fabricating only one scan driving circuit, eliminating the need to design different scan driving circuits for different resolution display panels. This improves product usability and reduces production costs and design cycle.

[0051] For example, in specific implementations, the scanning drive circuit can be designed with reference to the currently highest resolution display panel. In this way, the scanning drive circuit is applicable to both the highest resolution display panel and display panels with lower resolutions. As for the division method of the scanning drive units in the scanning drive circuit, the embodiments of the present invention are not limited.

[0052] As a possible implementation, referring to FIG4, optionally, the number of shift register modules 311 in each scan driving unit 310 is equal, and the total number of pixel groups 21 is an integer multiple of N. Here, N is the maximum number of driving groups in the scan driving unit 310.

[0053] Specifically, in this embodiment, by setting the number of shift register modules 311 in each scanning driving unit 310 to be equal, the maximum number of driving groups (N) of each scanning driving unit 310 can be equal. That is, each scanning driving unit 310 can scan the same number of pixel groups 21 without designing multiple different scanning driving units, which can reduce the design complexity of the scanning driving unit. Furthermore, when designing the maximum number of driving groups of the scanning driving unit 310, by setting the maximum number of driving groups N and the total number of pixel groups 21 to satisfy that the total number of pixel groups 21 is an integer multiple of N, it is beneficial to reduce the complexity of the division method of the scanning driving unit.

[0054] Furthermore, N can be selected as 5 or N=10. The units digit of the number of pixel rows in display panels with different resolutions is usually "0", that is, the number of pixel rows is usually an integer multiple of 10 and 5. For a common scheme in which a pixel group 21 consists of one or two rows of pixel structures P, the total number of pixel groups 21 can be an integer multiple of 10 or an integer multiple of 5. Therefore, the maximum number of driving groups of a scan driving unit 310 can be selected as N=5 or N=10. In this way, when designing the scan driving circuit, by adjusting the number of scan driving units 310, the same scan driving circuit 31 can be applied to display panels with different resolutions, effectively reducing the design difficulty of the scan driving circuit.

[0055] For example, for a display panel with 320 pixel groups, the maximum number of driving groups N of the scan driving unit 310 can be, but is not limited to, 32, 10, and 5. For a display panel with 640 pixel groups, the maximum number of driving groups N of the scan driving unit 310 can be, but is not limited to, 64, 10, and 5. Obviously, 10 and 5 are common factors of the total number of pixel groups in display panels of different resolutions. By setting N=5 or N=10, only the number of scan driving units needs to be adjusted to make the same scan driving circuit applicable to display panels of different resolutions, thus reducing the design difficulty of the scan driving circuit. For example, taking the common scheme of multiple pixel structures P in the same row forming a pixel group 21 as an example, N can be selected as 10. Assuming that the scan driving circuit 31 includes 192 scan driving units 310, the maximum number of pixel groups that the scan driving circuit 31 can drive is 1920 groups. Thus, the scan driving circuit 31 can be applied to display panels with 192 rows of pixels, as well as display panels with fewer pixel rows, including but not limited to display panels with 1280 rows of pixels, display panels with 640 rows of pixels, and display panels with 320 rows of pixels. Therefore, it has high practicality and does not require designing and manufacturing different scan driving circuits for display panels with different resolutions.

[0056] Figure 5 is a top view of another display panel provided in an embodiment of the present invention. Figures 4 and 5 show specific implementations in which part of the shift register module 311 in two different scan drive circuits 31 is electrically connected to the scan line G.

[0057] As shown in Figure 4, as one feasible implementation, each shift register module 311 in a select portion of the scan drive units 310 can be electrically connected to the scan line G. Specifically, for all the scan drive units 310 in the scan drive circuit 31, a portion of the scan drive units 310 can be selected, and the shift register modules 311 of these scan drive units 310 can be electrically connected to the scan line G, while the output terminals of the shift register modules 311 of the remaining scan drive units 310 are left suspended.

[0058] As shown in Figure 5, as another feasible implementation, some cascaded shift register modules 311 in each scan driving unit 310 can be electrically connected to the scan line G. Specifically, for all scan driving units 310 in the scan driving circuit 31, each scan driving unit 310 has some cascaded shift register modules 311 electrically connected to the scan line G, while the output terminals of the remaining shift register modules 311 in each scan driving unit 310 are in a suspended state. Both of the above methods can achieve sequential scanning of each pixel group 21.

[0059] It should be noted that the number of pixel groups 21 and the design of the scan driving circuit 31 shown in Figures 4 and 5 are for illustrative purposes only. Taking a scan driving circuit comprising 64 scan driving units, with each unit having a maximum of 10 driving groups (meaning the entire scan driving circuit can drive a maximum of 640 pixel groups) as an example, assuming the display panel comprises 320 pixel groups, to achieve sequential scanning of these 320 pixel groups, 32 scan driving units in the scan driving circuit can be selected. Each shift register module of these units can be electrically connected to its corresponding scan line, while the output terminals of the shift register modules of the other 32 units are left floating. Alternatively, the first five cascaded shift register modules of each of the 64 scan driving units can be electrically connected to their corresponding scan lines. During the display process, the driving chip can send corresponding control signals (such as level signals, pulse signals, and initial signals) to each selected scan driving unit to achieve sequential scanning of the 320 pixel groups.

[0060] The following examples, using LCD panels and LED panels as examples, illustrate the configuration of the scanning drive circuit.

[0061] Figure 6 is a top view of another display panel provided in an embodiment of the present invention, illustratively illustrating a liquid crystal display panel. As shown in Figure 6, optionally, when the display panel is a liquid crystal display panel, the number of shift register modules 311 in the scan driving unit 310 is equal to the maximum number of drive groups of pixel groups 21 by the scan driving unit 310.

[0062] As described above, the pixel structure P is electrically connected to the scan line G, specifically meaning that the circuit structure within the pixel structure is electrically connected to the scan line. Specifically, as shown in Figure 6, the liquid crystal display panel has an array of thin-film transistors (TFTs). The gate of the TFT is electrically connected to the scan line G, the source of the TFT is electrically connected to the data line D, and the drain of the TFT is electrically connected to the pixel electrode 22. When the scan driving circuit 31 drives the TFT to open via the scan line G, the driving chip can transmit the data voltage signal via the data line D to the pixel electrode 22 through the TFT, controlling the electric field between the pixel electrode 22 and the common electrode, thereby controlling the deflection angle of the liquid crystal under the action of the electric field and achieving control over the light output of the pixel structure. Therefore, in the liquid crystal display panel, one pixel structure P is electrically connected to one scan line G. For a pixel group 21 electrically connected to the same scan line G, a shift register module 311 is needed to provide a scan signal; that is, the shift register module 311 corresponds one-to-one with the pixel group 21. When the maximum number of driving groups in the design of the scanning driving unit 310 is N, the scanning driving unit 310 needs to be configured to have the same number of shift register modules 311, that is, the number of shift register modules 311 in the scanning driving unit 310 is equal to the maximum number of driving groups of the scanning driving unit 310 for the pixel group 21.

[0063] It should be noted that Figure 6 is only an example of a row of pixel structures P forming a pixel group 21. This arrangement is for illustrative purposes only and is not a limitation. For example, in other embodiments, two adjacent rows of pixel structures P can be electrically connected to the same scan line G to form a pixel group. This embodiment of the present invention does not limit this.

[0064] Figure 7 is a schematic diagram of another display panel structure provided in an embodiment of the present invention, taking an LED display panel (e.g., an OLED display panel, a micro-LED display panel, and a mini-LED display panel) as an example. Figure 8 is a schematic diagram of a pixel circuit in the display panel shown in Figure 7. Referring to Figures 7 and 8, optionally, when the display panel is an LED display panel, the pixel structure includes a pixel circuit 23; the scan lines G include a first scan line G1, a second scan line G2, and a third scan line G3; the pixel circuit 23 is electrically connected to the first scan line G1, the second scan line G2, and the third scan line G3 respectively; the scan driving circuit includes a first scan driving circuit 31A and a second scan driving circuit 31B; the first scan driving circuit 31A is used to provide an initialization control signal S1 to the pixel circuit 23 through the first scan line G1, and / or, to provide a data writing control signal S2 to the pixel circuit 23 through the second scan line G2; the second scan driving circuit 31B is used to provide a light emission control signal EMIT to the pixel circuit 23 through the third scan line G3; and the same first scan line G1 and the same second scan line G3 are used for the same initialization control signal S1 and the same second scan line G2. Multiple pixel structures electrically connected by scan line G2 constitute a first pixel group 21A; the first scan driving circuit 31A includes multiple first scan driving units 310A, each first scan driving unit 310A including multiple first shift register modules 311A, the number of first shift register modules 311A ​​in the first scan driving unit 310A being greater than or equal to the maximum number of driving groups of the first scan driving unit 310A for the first pixel group 21A; multiple pixel structures electrically connected to the same third scan line G3 constitute a second pixel group 21B; the second scan driving circuit 31B includes multiple second scan driving units 310B, each second scan driving unit 310B including multiple second shift register modules 311B, the number of second shift register modules 311B in the second scan driving unit 310B being equal to the maximum number of driving groups of the second scan driving unit 310B for the second pixel group 21B.

[0065] For example, Figure 8 illustrates a 7T1C pixel circuit commonly used in LED display panels. As shown in Figure 8, the pixel circuit 23 includes a driving transistor T1, an initialization transistor T2, a data writing transistor T3, a threshold compensation transistor T4, a first light-emitting control transistor T5, a second light-emitting control transistor T6, a reset transistor T7, and a storage capacitor Cst. These components are connected as shown in Figure 8 to form the 7T1C pixel circuit. Figure 9 is a timing diagram of the driving process of the pixel circuit shown in Figure 8. Combining Figures 8 and 9, the driving process of the pixel circuit includes an initialization stage t1, a data writing stage t2, and a light-emitting stage t3. Specifically, in the initialization stage t1, the initialization transistor T2 is turned on under the control of the initialization control signal S1, causing the initialization signal Vref to be written into the gate of the driving transistor T1, thus initializing the gate of the driving transistor T1. During the data writing phase t2, data writing transistor T3 and threshold compensation transistor T4 are turned on under the control of data writing control signal S2. Simultaneously, driving transistor T1 is turned on because its gate-source voltage meets the turn-on condition. This allows data writing transistor T3 to write the data signal Vdata to the gate of driving transistor T1, while threshold compensation transistor T4 drives the gate of driving transistor T1 with the threshold voltage compensation value. Furthermore, during data writing phase S2, reset transistor T7 can be turned on under the control of data writing control signal S2, writing the initialization signal Vref to the anode of the LED, resetting the anode voltage of the LED. During the light emission phase t3, the first light emission control transistor T5 and the second light emission control transistor T6 are turned on under the control of light emission control signal EMIT. Because the storage capacitor Cst stores the gate potential of driving transistor T1, driving transistor T1 generates a driving current based on the gate potential and the potential of the first power supply signal terminal PVDD, driving the LED to emit light. In Figure 8, PVEE is the second power supply signal terminal, and the potential of the second power supply signal terminal PVEE is lower than the potential of the first power supply signal terminal PVDD.

[0066] Furthermore, given that the initialization phase t1 and the data writing phase t2 are adjacent, and the potential changes of the initialization control signal S1 and the data writing control signal S2 are the same, multiple pixel structures electrically connected to the same first scan line G1 and the same second scan line G2 can be configured into a first pixel group 21A. The first scan driving circuit 31A provides corresponding scan signals to each first pixel group 21A through the first scan line G1 and the second scan line G2 respectively.

[0067] Specifically, referring to Figures 7 and 8, as one feasible implementation, the first scan line G1 and the second scan line G2 can be electrically connected to the same first scan driving circuit 31A. In this way, the first scan driving circuit 31A provides an initialization control signal S1 to the pixel circuit 23 through the first scan line G1, and simultaneously provides a data write control signal S2 to the pixel circuit 23 through the second scan line G2. At this time, the number of first shift register modules 311A ​​in the first scan driving unit 310A is greater than the maximum number of driving groups of the first pixel group 21A by the first scan driving unit 310A. Referring to Figure 7, for a scan driving unit 310A, the first shift register module 311A ​​firstly transmits an initialization control signal S1 to the first scan line G1 connected to the first first pixel group 21A, completing the initialization stage of the first first pixel group 21A. Next, while transmitting a data writing control signal S2 to the second scan line G2 connected to the first first pixel group 21A, the second shift register module 311A ​​also transmits an initialization control signal S1 to the first scan line G1 connected to the second first pixel group 21A, so that the data writing stage of the first first pixel group 21A and the initialization stage of the second first pixel group 21A are completed synchronously. And so on. When the maximum number of driving groups of the first scan driving unit 310A is N groups, the first scan driving unit 310A needs to be set to include (N+1) first shift register modules 311A. Therefore, the number of first shift register modules 311A ​​in the first scan driving unit 310A is greater than the maximum number of driving groups of the first pixel group 21A in the first scan driving unit 310A. For example, Figure 7 illustrates a first scan driving unit 310A with a maximum number of 4 driving groups. Accordingly, a first scan driving unit 310A should include 5 first shift register modules 311A ​​to meet the design requirement of a maximum number of 4 driving groups.

[0068] Of course, the configuration of the first scan driving circuit shown in Figure 7 is not unique. In other embodiments, the number of first scan driving circuits 31A can be increased, so that the first scan line G1 and the second scan line G2 are electrically connected to different first scan driving circuits 31A. For example, two first scan driving circuits 31A can be configured. In this way, one first scan driving circuit 31A only needs to provide the initialization control signal S1 to the pixel circuit 23 through the first scan line G1, and the other first scan driving circuit 31A only needs to provide the data writing control signal S2 to the pixel circuit 23 through the second scan line G2. At this time, since the initialization control signal S1 and the data writing control signal S2 required by each first pixel group 21A are transmitted independently and do not affect each other, the number of first shift register modules 311A ​​in the first scan driving unit 310A is equal to the maximum number of driving groups of the first pixel group 21A by the first scan driving unit 310A. The first scan driving unit 310A can be configured to include the same number of first shift register modules 311A ​​according to the maximum number of driving groups of the first scan driving unit 310A.

[0069] Similarly, given that the potential changes of the emission control signal EMIT are different from those of other scan signals, multiple pixel structures electrically connected to the same third scan line G3 can be configured into a second pixel group 21B. The second scan driving circuit 31B provides the emission control signal EMIT to each second pixel group 21B through the third scan line G3. Referring to Figure 7, for the second scan driving circuit 31B, once the maximum number of driving groups of the second scan driving unit 310B is determined, the second scan driving unit 310B can be configured to include the same number of second shift register modules 311B to meet the design requirements for the maximum number of driving groups of the second scan driving unit 310B.

[0070] It should be noted that Figure 7 is only illustrated by the example that the first pixel group 21A and the second pixel group 21B are both composed of the same row of pixel structures. In other embodiments, the first pixel group 21A and the second pixel group 21B may also be composed of different pixel structures. This embodiment of the present invention does not limit this.

[0071] It should also be noted that the structure of the pixel circuit shown in Figure 8 is only schematic. For LED display panels, there can be many different designs for the pixel circuit, and the connection between the different pixel circuits and the scan lines is different and difficult to list. Those skilled in the art can design the number of scan drive circuits and the scan drive units in each scan drive circuit based on the above explanation and in combination with the actual pixel circuit. These will not be elaborated here.

[0072] Furthermore, it should be noted that Figures 4-7 illustrate the connection relationship between the shift register module 311 and the scan line G. The diagram is illustrated by arranging the shift register module 311 along the longitudinal direction (such as the extension direction of the data line). This arrangement is often used when the conventional shift register module is located in the border area on the front side of the substrate to reduce the area occupied by the non-display area. However, in this embodiment, since the scan drive circuit 31 is located on the back side of the substrate, the available space is significantly increased. Therefore, the arrangement of the shift register module 311 is not limited to this.

[0073] For example, Figure 10 is a schematic diagram of a scanning drive circuit in a display panel provided by an embodiment of the present invention. As shown in Figure 10, optionally, multiple shift register modules 311 in any scanning drive unit 310 are arranged along a first direction X, and each scanning drive unit 310 is arranged along a second direction Y, wherein the first direction X and the second direction Y intersect and are both parallel to the plane where the substrate 10 is located. For example, the first direction X can be a direction parallel to the scan line, and the second direction Y can be a direction parallel to the data line. This arrangement facilitates setting a larger number of scanning drive units 310 along the second direction Y, enabling the same scanning drive circuit design to be applied to display panels of multiple resolutions simultaneously, thus improving product usability. Furthermore, referring to FIG10, since the output terminals of each shift register module 311 in the scan driving unit 310 are electrically connected to the first pad 51 through wiring, when the scan driving circuit 31 includes the same number of scan driving units 310, compared with the method of arranging the shift register modules 311 in the same scan driving unit 310 along the second direction Y, this embodiment avoids the situation where multiple scan driving units 310 in the same scan driving circuit 31 are arranged side by side along the first direction X, thereby avoiding mutual interference between the wiring of different scan driving units 310 to the first pad 51 at the edge, and reducing the design difficulty.

[0074] Figure 11 is a schematic diagram of another structure of the scanning driving circuit in the display panel provided by an embodiment of the present invention. As shown in Figure 11, in the LED display panel, optionally, a plurality of first shift register modules 311A ​​in the first scanning driving unit 310A are arranged in an array along the first direction X; a plurality of second shift register modules 311B in the second scanning driving unit 310B are arranged in an array along the first direction X; the first scanning driving unit 310A and the second scanning driving unit 310B are alternately arranged along the second direction Y.

[0075] As described above, for an LED display panel, the scanning drive circuit needs to include both a first scanning drive circuit and a second scanning drive circuit. In this embodiment, by arranging multiple first shift register modules 311A ​​in the first scanning drive unit 310A along the first direction X array, arranging multiple second shift register modules 311B in the second scanning drive unit 310B along the first direction X array, and alternately arranging multiple first scanning drive units 310A in the first scanning drive circuit and multiple second scanning drive units 310B in the second scanning drive circuit along the second direction Y, it is beneficial for the first scanning drive unit 310A and the second scanning drive unit 310B to be electrically connected to the corresponding scan lines. In addition, it is also beneficial for improving the integration of the scanning drive circuit.

[0076] It should be noted that Figures 10 and 11 are only illustrated with the example of scanning drive circuits 31 being provided on both the left and right sides of the back surface of the substrate. This is beneficial for improving the voltage uniformity at different positions on the scan line, similar to the principle of scanning drive circuits being simultaneously provided on the left and right borders. This arrangement is not unique; in other embodiments, only one scanning drive circuit 31 may be provided on the back surface of the substrate.

[0077] Referring to Figure 4, based on the above description, in this embodiment of the invention, since the scan line G and the scan driving circuit 31 are located on opposite sides of the substrate, a first pad 51 can be provided corresponding to the output terminal of the scan driving circuit 31, and a second pad 52 can be provided corresponding to the scan line G. The corresponding first pad 51 and second pad 52 are then electrically connected via a first flexible circuit board to achieve electrical connection between the scan line G and the scan driving circuit 31. Specifically, the output terminal of the scan driving circuit 31 is the output terminal of each shift register module 311. As shown in Figure 4, the first pad 51 is provided in a one-to-one correspondence with the shift register module 311. The first pad 51 and the scan driving circuit 31 are located on the same side of the substrate and are electrically connected to the output terminal of the shift register module 311. For the scheme in which the partial shift register module 311 in the above-mentioned scanning drive circuit 31 is electrically connected to the scan line G so that the design of the same scanning drive circuit 31 can be applied to display panels with different resolutions, it is only necessary to electrically connect the first pad 51 corresponding to the selected partial shift register module 311 to the second pad 52 corresponding to the corresponding scan line through the line on the first flexible circuit board. The operation is simple and highly practical.

[0078] Referring to FIG10, optionally, the first pad 51 is located on the side of the scan drive circuit 31 near the edge of the substrate 10; this arrangement facilitates the bonding of the first pad 51 to the first flexible circuit board.

[0079] Furthermore, regarding the arrangement of the first pads 51, referring to Figure 10, as a feasible implementation, the first pads 51 can optionally be arranged side-by-side along the second direction Y. Specifically, all the first pads 51 corresponding to the scan drive circuit 31 are arranged side-by-side along the second direction Y. Optionally, the second direction Y is parallel to the data line. Since the extension directions of the scan line and the data line intersect, the second pads corresponding to each scan line are arranged along the extension direction of the data line. When the second direction Y is parallel to the data line, by setting the first pads 51 to be arranged side-by-side along the second direction Y, it is convenient for the first pads 51 and the second pads 52 to be electrically connected.

[0080] Figure 12 is a schematic diagram of another structure of the scanning drive circuit in the display panel provided in an embodiment of the present invention. As shown in Figure 12, as another feasible implementation, optionally, the first pads 51 are arranged side by side along the first direction X. Specifically, all the first pads 51 corresponding to the scanning drive circuit 31 are arranged side by side along the first direction X. Optionally, the first direction X is a direction parallel to the scan line.

[0081] Figure 13 is a schematic diagram of another structure of the scanning drive circuit in the display panel provided in an embodiment of the present invention. As shown in Figure 13, as another feasible implementation, optionally, the first pads 51 are arranged side by side along the first direction X, and the first pads 51 are arranged side by side along the second direction Y. Specifically, among all the first pads 51 corresponding to the scanning drive circuit 31, a portion of the first pads 51 are arranged side by side along the first direction X, and another portion of the first pads 51 are arranged side by side along the second direction Y. This arrangement helps to reduce the density of the first pads 51, thereby reducing the risk of short circuit.

[0082] It should be noted that, regardless of how the first pad 51 is arranged, it is sufficient to ensure that the first pad 51 corresponding to the scanning drive circuit 31 is electrically connected to the shift register module 311 in a one-to-one correspondence.

[0083] Based on the same inventive concept, this invention also provides a method for preparing a display panel, which is used to prepare the display panel provided in any of the above embodiments, and thus has the same beneficial effects as the above display panels. The similarities will not be repeated here.

[0084] For example, Figure 14 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present invention. As shown in Figure 14, the manufacturing method includes the following steps:

[0085] S110 provides a substrate.

[0086] The substrate can be a rigid substrate or a flexible substrate, and the material of the substrate is not limited in the embodiments of the present invention.

[0087] S120. Prepare a scanning drive circuit on one side of the substrate.

[0088] Specifically, the scanning drive circuit can be fabricated on the back side of the substrate using processes such as photolithography. The configuration of the scanning drive circuit is described above and will not be repeated here. The specific circuit structure of the shift register modules in the scanning drive circuit is not limited in this embodiment. Furthermore, during the fabrication of the scanning drive circuit, the fabrication of the first pads electrically connected to the output terminals of each shift register module of the scanning drive circuit can be completed simultaneously.

[0089] S130. A pixel structure is fabricated on the side of the substrate away from the scanning drive circuit.

[0090] Specifically, those skilled in the art can prepare the various film layers containing the pixel structures according to the specific type of display panel, thereby obtaining multiple pixel structures. The specific preparation methods will not be described in detail here. It is understood that during the preparation process of the pixel structures, the aforementioned scan lines, data lines, and second pads electrically connected to the scan lines are also prepared simultaneously.

[0091] S140. Electrically connect the pixel structure to the scan drive circuit.

[0092] Specifically, at least a portion of the first pads corresponding to the scan driving circuit can be electrically connected to the second pads corresponding to the scan lines connected to the pixel structure using a connector, thereby achieving electrical connection between the pixel structure and the scan driving circuit. The connector can be, for example, a flexible circuit board.

[0093] As described above, when the total number of shift register modules in the scan driving circuit is greater than the total number of pixel groups formed by the pixel structure, resulting in the maximum number of pixel groups that the scan driving circuit can drive being greater than the total number of pixel groups actually contained in the display panel, referring to Figure 4, a portion of the shift register modules 311 of the scan driving circuit 31 can be electrically connected to the scan line G according to the actual resolution of the display panel. That is, only the first pad 51 corresponding to this portion of the shift register modules 311 needs to be electrically connected to the second pad 52 corresponding to the scan line G (the remaining first pads 51 are in a suspended state). When the maximum number of pixel groups that the scan driving circuit can drive is equal to the total number of pixel groups actually contained in the display panel, referring to Figure 3, all first pads 51 need to be electrically connected to the corresponding second pads 52. The specific connection method can be referred to the above description and will not be repeated here.

[0094] Based on the same inventive concept, this embodiment of the invention also provides a display device. For example, FIG15 is a schematic structural diagram of a display device provided in an embodiment of the invention. As shown in FIG15, the display device 200 includes the display panel 100 provided in any of the above embodiments, and thus possesses the same beneficial effects as the aforementioned display panel. The similarities can be found in the descriptions of the above embodiments, and will not be repeated here. The display device 200 can be any type of display device, including but not limited to LCD displays and LED displays. Furthermore, the display device 200 provided in this embodiment of the invention can be a mobile phone as shown in FIG15, or any electronic product with display functionality, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc. This embodiment of the invention does not impose any special limitations on these categories.

[0095] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: Substrate, pixel structure, and scan driving circuit; The pixel structure is electrically connected to the scanning drive circuit; Along a direction perpendicular to the plane of the substrate, the pixel structure and the scan driving circuit are located on opposite sides of the substrate; the display panel further includes scan lines and a first flexible circuit board; the pixel structure is electrically connected to the scan lines; the scan lines and the scan driving circuit are electrically connected through the first flexible circuit board; multiple pixel structures electrically connected to the same scan lines constitute a pixel group; the scan driving circuit includes multiple scan driving units, each scan driving unit including multiple cascaded shift register modules; the maximum number of drive groups for the pixel group by the scan driving unit is N groups, where N is a positive integer and N is less than the total number of pixel groups; the total number of shift register modules in the scan driving circuit is greater than the total number of pixel groups, and some of the shift register modules in the scan driving circuit are electrically connected to the scan lines; the display panel is an LED display panel; the pixel structure includes a pixel circuit; the scan lines include a first scan line, a second scan line, and a third scan line; the pixel circuit is electrically connected to the first scan line, the second scan line, and the third scan line respectively; the scan driving circuit includes a first scan driving unit... The system includes a first scan driving circuit and a second scan driving circuit; the first scan driving circuit is used to provide an initialization control signal to the pixel circuit through the first scan line, and / or to provide a data writing control signal to the pixel circuit through the second scan line; the second scan driving circuit is used to provide a light emission control signal to the pixel circuit through the third scan line; a plurality of pixel structures electrically connected to the same first scan line and the same second scan line constitute a first pixel group; the first scan driving circuit includes a plurality of first scan driving units, each first scan driving unit including a plurality of first shift register modules, the number of first shift register modules in the first scan driving unit being greater than or equal to the maximum number of driving groups of the first scan driving unit for the first pixel group; a plurality of pixel structures electrically connected to the same third scan line constitute a second pixel group; the second scan driving circuit includes a plurality of second scan driving units, each second scan driving unit including a plurality of second shift register modules, the number of second shift register modules in the second scan driving unit being equal to the maximum number of driving groups of the second scan driving unit for the second pixel group.

2. The display panel according to claim 1, characterized in that, The number of shift register modules in each of the scanning drive units is equal, and the total number of pixel groups is an integer multiple of N.

3. The display panel according to claim 2, characterized in that, N=5 or N=10.

4. The display panel according to claim 1, characterized in that, Each of the shift register modules in some of the scan drive units is electrically connected to the scan line.

5. The display panel according to claim 1, characterized in that, The shift register modules cascaded in some of the scan drive units are electrically connected to the scan lines.

6. The display panel according to claim 1, characterized in that, The first scan driving unit has a plurality of first shift register modules arranged in an array along a first direction; the second scan driving unit has a plurality of second shift register modules arranged in an array along the first direction; the first scan driving unit and the second scan driving unit are alternately arranged along a second direction; wherein the first direction and the second direction intersect and are both parallel to the plane of the substrate.

7. The display panel according to claim 1, characterized in that, The display panel also includes a plurality of first pads that are configured one-to-one with the shift register module; the first pads and the scanning drive circuit are located on the same side of the substrate and are electrically connected to the output terminal of the shift register module.

8. The display panel according to claim 7, characterized in that, The first pad is located on the side of the scanning drive circuit near the edge of the substrate; the first pad is arranged side by side along a first direction, and / or the first pad is arranged side by side along a second direction; the first direction and the second direction intersect and are both parallel to the plane of the substrate.

9. A method for manufacturing a display panel, used to manufacture the display panel according to any one of claims 1-8, characterized in that, include: Provide a substrate; fabricate a scanning drive circuit on one side of the substrate; A pixel structure is fabricated on the side of the substrate opposite to the scanning drive circuit; The pixel structure is electrically connected to the scan driving circuit; wherein, the display panel further includes scan lines and a first flexible circuit board; the pixel structure is electrically connected to the scan lines; the scan lines and the scan driving circuit are electrically connected through the first flexible circuit board; multiple pixel structures electrically connected to the same scan lines constitute a pixel group; the scan driving circuit includes multiple scan driving units, each scan driving unit including multiple cascaded shift register modules; the maximum number of drive groups for the pixel group by the scan driving unit is N groups, where N is a positive integer and N is less than the total number of pixel groups; the total number of shift register modules in the scan driving circuit is greater than the total number of pixel groups, and some of the shift register modules in the scan driving circuit are electrically connected to the scan lines; the display panel is an LED display panel; the pixel structure includes a pixel circuit; the scan lines include a first scan line, a second scan line, and a third scan line; the pixel circuit is electrically connected to the first scan line, the second scan line, and the third scan line respectively; the scan driving circuit includes a first scan driving circuit and a second scan driving circuit. The first scan driving circuit is used to provide an initialization control signal to the pixel circuit through the first scan line, and / or to provide a data write control signal to the pixel circuit through the second scan line; the second scan driving circuit is used to provide a light emission control signal to the pixel circuit through the third scan line; a plurality of pixel structures electrically connected to the same first scan line and the same second scan line constitute a first pixel group; the first scan driving circuit includes a plurality of first scan driving units, each first scan driving unit including a plurality of first shift register modules, the number of first shift register modules in the first scan driving unit being greater than or equal to the maximum number of driving groups of the first scan driving unit for the first pixel group; a plurality of pixel structures electrically connected to the same third scan line constitute a second pixel group; the second scan driving circuit includes a plurality of second scan driving units, each second scan driving unit including a plurality of second shift register modules, the number of second shift register modules in the second scan driving unit being equal to the maximum number of driving groups of the second scan driving unit for the second pixel group.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

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