Display substrate, display panel and display device

Abstract

The invention provides a display substrate, a display panel and a display device. The display substrate comprises a display area and a frame area arranged around the display area, and the display area is provided with a plurality of pixels; the frame area comprises a gate drive circuit located on at least one side of the frame area and provides gate drive signals for the pixels; the source electrode driving circuit is located on the first side, adjacent to the at least one side, of the frame area and used for providing display signals for the multiple pixels; the source electrode driving circuit comprises a plurality of source electrode driving chips which are sequentially arranged on the first side of the frame area in the first direction. And a first distance between two adjacent source electrode driving chips closest to the grid electrode driving circuit in the first direction is smaller than a second distance between two adjacent source electrode driving chips closest to the center line of the display area in the first direction in the plurality of source electrode driving chips.

Description

Technical Field

[0001] The present invention relates to the field of displays, and more particularly, to a display substrate, a display panel, and a display device. Background Art

[0002] With the continuous development of AMOLED (Active-Matrix Organic Light-Emitting Diode), large and medium-sized flexible displays based on AMOLED will be the development trend in the next few years. With the development of new technologies, new challenges also arise. For example, how to reduce the load resistance of the signal transmission path to ensure the consistency of signal transmission loss, and how to reduce the size of the display substrate have become problems that need to be solved by those skilled in the art. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art, and provides a display substrate, a display panel, and a display device, which can reduce the lateral size of the row-direction printed circuit board for providing various drive signals and can increase the signal trace width provided for the gate driving circuit to alleviate the problem of excessive load resistance.

[0004] A first aspect of this application provides a display substrate, including a display area and a border area disposed around the display area. Among them, a plurality of pixels are provided in the display area; the border area includes: a gate driving circuit located on at least one of the opposite sides of the border area, configured to provide gate driving signals for the plurality of pixels; and a source driving circuit located on the first side adjacent to the at least one side of the border area, configured to provide display signals for the plurality of pixels. The source driving circuit includes a plurality of source driving chips arranged in sequence along a first direction on the first side of the border area; and a first distance between two adjacent source driving chips closest to the gate driving circuit in the first direction is less than a second distance between two adjacent source driving chips closest to the center line of the display area in the first direction among the source driving chips.

[0005] In some embodiments, the display substrate further includes a plurality of flexible printed circuit boards and a signal board; wherein, the plurality of flexible printed circuit boards are located on a first side of the border area and on a side of the source driver circuit away from the display area, and the plurality of flexible printed circuit boards are electrically connected to the plurality of source driver chips in a one-to-one correspondence; and the signal board is located on the first side of the border area and on a side of the plurality of flexible printed circuit boards away from the display area, and is electrically connected to the plurality of flexible printed circuit boards to provide signals from the signal board to the source driver circuit and the gate driver circuit through the plurality of flexible printed circuit boards; wherein, a positive projection of an edge of the signal board closest to the gate driver circuit on the first side of the display substrate is closer to a center line of the display area in a first direction than a positive projection of an edge of the plurality of flexible printed circuit boards closest to the gate driver circuit on the first side of the display substrate.

[0006] In some embodiments, a positive projection of an edge of the signal board closest to the gate driver circuit on the first side of the display substrate is between a positive projection of an edge of the plurality of flexible printed circuit boards closest to the gate driver circuit on the first side of the display substrate and a positive projection of an edge of the plurality of source driver chips closest to the gate driver circuit on the first side of the display substrate.

[0007] In some embodiments, the display substrate further includes at least one set of leads respectively corresponding to the at least one side, wherein each set of leads includes a plurality of leads, and the at least one set of leads extends from a corresponding source driver chip to a corresponding flexible printed circuit board, extends a first length along the first direction in the flexible printed circuit board, and then extends out and is electrically connected to a corresponding gate driver circuit.

[0008] In some embodiments, each set of leads includes at least three sections, the at least three sections include a first section, a second section, and a third section. The first section extends from the corresponding source driver chip to the corresponding flexible printed circuit board along a second direction substantially intersecting the first direction, the second section extends along the first direction in the corresponding flexible printed circuit board, and the third section extends out from the flexible printed circuit board in the second direction and then is electrically connected to the corresponding gate driver circuit, so as to sequentially transmit a signal obtained by level conversion of a driving signal related to the gate driver circuit in the signal board by the corresponding source driver chip to the gate driver circuit through the first section, the second section, and the third section; and a first width of each lead in the first direction and / or a second width of each lead in the second section along the second direction is greater than a third width of each lead in the third section along the first direction.

[0009] In some embodiments, the first width is equal to the second width.

[0010] In some embodiments, the at least three segments further include a fourth segment, one end of which is connected to a position between the first segment and the second segment, and the other end of which is connected to the flexible circuit board to test the signal after being level-converted by the corresponding source driver chip.

[0011] In some embodiments, the fourth width of each lead in the fourth segment along the second direction is equal to the second width and / or the third width.

[0012] In some embodiments, the at least one side includes opposite third and fourth sides, and the gate driving circuit includes a first gate driving array disposed on the third side and a second gate driving array on the fourth side respectively; the distance between the two source driver chips closest to the third side among the multiple source driver chips is a first distance a1, the distance between the two source driver chips closest to the fourth side is a third distance a2, and the distance between two adjacent source driver chips closest to the center line of the display area in the first direction is a second distance b; and the first distance, the third distance, and the second distance satisfy the relationship: a1 < b and a2 < b.

[0013] In some embodiments, the first distance, the second distance, and the third distance satisfy the relationship: a1 = a2 = Kb, where the range of K is from 1 / 4 to 3 / 4.

[0014] In some embodiments, among the multiple source driver chips, the distance between two adjacent source driver chips closer to the center line is greater.

[0015] In some embodiments, among the multiple source driver chips, except that the distance between two adjacent source driver chips closest to the center line of the display area in the first direction is the second distance b, the distance between any other two adjacent source driver chips in the first direction is the first distance a1, where a1 < b.

[0016] In some embodiments, the widths of the projections in the first direction of the first flexible circuit board closest to the third side and the sixth flexible circuit board closest to the fourth side among the multiple flexible circuit boards are greater than the widths of the projections in the first direction of each of the other flexible circuit boards.

[0017] A second aspect of the present application provides a display panel, which includes the display substrate as in the above embodiments and a color filter substrate disposed opposite to the display substrate.

[0018] A third aspect of the present application provides a display device, including the display panel as in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure, and do not constitute a limitation to the present disclosure. By describing the detailed exemplary embodiments with reference to the accompanying drawings, the above and other features and advantages will become more apparent to those skilled in the art. In the accompanying drawings:

[0020] Figure 1 FIG. 0000040 is a schematic structural diagram of an OLED display substrate in the related art;

[0021] Figure 2 FIG. 0000041 is a partial wiring diagram of an OLED display substrate in the related art;

[0022] Figure 3 FIG. 0000042 is an enlarged schematic diagram of the wiring at position A of an OLED display substrate in the related art;

[0023] Figure 4 FIG. 0000043 is a schematic structural diagram of an OLED display substrate according to an embodiment of the present disclosure;

[0024] Figure 5 FIG. 0000044 is a schematic structural diagram of an OLED display substrate according to an embodiment of the present disclosure;

[0025] Figure 6 FIG. 0000045 is a partial wiring diagram of an OLED display substrate according to an embodiment of the present disclosure; and

[0026] Figure 7 FIG. 0000046 is a schematic diagram of the wiring method at position B of an OLED display substrate according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the display substrate and the display device provided by the present disclosure will be further described in detail below with reference to the accompanying drawings and exemplary embodiments.

[0028] The shapes and sizes of the components in the accompanying drawings do not reflect the true proportions, and the purpose is only to facilitate the understanding of the content of the embodiments of the present invention.

[0029] It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present disclosure, the first element may be referred to as the second element or the third element, etc., and similarly, the second element may be referred to as the first element or the third element, etc.

[0030] It should be noted that the first direction and the second direction mentioned below may be any directions, and the first direction and the second direction intersect each other. For example, the display substrate includes a relative first side AS and a second side BS, and a relative third side CS and a fourth side DS, wherein the first side AS is connected between the third side CS and the fourth side DS, and the first direction may be an extension direction of the first side AS of the display substrate (for example, a row direction), and the second direction may be an extension direction of the third side CS of the display substrate (for example, a column direction). For the sake of convenience of description, the following description takes the first direction as a row direction (X direction) parallel to the lower side of the display substrate, the second direction as a column direction (Y direction) parallel to the right side of the display substrate, and the first direction and the second direction as being perpendicular or approximately perpendicular to each other as an example.

[0031] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0032] Currently, most medium and large-sized AMOLED systems are composed of a timing controller TCON (Timing controller, including circuit board PCBA) and several SICs (Source IC). Figure 1 and Figure 2 As shown, in conventional designs, in order to meet the consistency of the load resistance (RC loading) of each channel, multiple source driver chips SourceIC are evenly distributed on the lower side of the display substrate and arranged in sequence along the lateral direction of the display substrate. The gate driver circuit GOA unit is located on both sides of the display substrate. The signal of the required gate driver circuit GOA output from the timing controller TCON (referred to as the required GOA signal) is level-converted by the source driver chip SIC and then output from the external pin joint (OLB) end of the source driver chip SIC to the gate driver circuit GOA units on both sides of the display substrate. The lateral (X direction, first direction X) size of the signal board PCBA of the timing controller TCON is limited by the layout of the source driver chip SIC, the X-direction size of the display substrate connector, the distribution of the flexible circuit board (FPC) connecting the source driver chip and the signal board PCBA, and RC loading, etc. Therefore, in order to reduce the X-direction size of the printed circuit board PCBA, etc., it has become a technical problem faced by those skilled in the art.

[0033] At present, in order to narrow the frame, the display substrate is designed to reduce the width of the lower side of the display substrate in the longitudinal direction (Y direction) as much as possible, so that the required GOA signal from the source driver chip SIC to the gate driver circuit unit on both sides of the display substrate is very thin, such as Figure 2 and Figure 3as shown at position A in Figure 3 As shown, the total width T of the wiring in the Y direction (the second direction Y) is small due to the width limitation in the longitudinal direction on the lower side of the display substrate. As a result, each wiring is very thin. Since the wiring is very thin, the load resistance RC loading is large. At this time, the distance between the source driver chip SIC closest to the display substrate side in the X direction and this side is D. In this case, if the source driver chip SIC is offset towards the center, the width of the signal board in the X direction at the corresponding position cannot be reduced either. That is, in the related art, since the source driver chip SIC cannot be offset towards the center, because the more it is offset, the farther it is from the gate driver circuits GOA on both sides of the display substrate, and the larger the load resistance. Therefore, when the edge source driver chip SIC cannot be moved towards the center, the width of the signal board PCBA in the X direction cannot become smaller.

[0034] Based on this, the first aspect of the embodiments of the present disclosure provides a display substrate, which can solve at least a part of the above problems. Specifically, as Figure 4 shown, the display area AA of the display substrate provided by the present disclosure includes a plurality of pixels arranged in an array. For example, every three pixels of different colors, such as red pixels ( Figure 4 R in Figure 4 ), green pixels ( Figure 4 G in Figure 4 ), and blue pixels ( Figure 4 B in Figure 4 ) form a pixel unit; it should be noted here that the color of the pixels in the embodiments of the present disclosure can be determined according to the color of the light-emitting devices in each pixel; for example: if the light emitted by the light-emitting device is red light, then this pixel is called a red pixel; of course, if the light-emitting colors of all the light-emitting devices in the display substrate are the same, for example, all the light-emitting devices emit white light, then it is determined according to the color of the color film in the color film substrate disposed opposite to the display substrate in the display panel applied; for example: if the color of the color film on the color film substrate corresponding to a certain pixel is red, then this pixel is called a red pixel.

[0035] It should be noted that the display substrate provided by the embodiments of the present disclosure can be of any shape, such as rectangular, circular, hexagonal, etc. For the convenience of description, the following will be described with the display substrate being rectangular. The rectangular display substrate includes a first side AS and a second side BS that are oppositely arranged, and a third side CS and a fourth side DS that are oppositely arranged. Hereinafter, the first side AS is taken as the lower side, the second side BS as the upper side, the third side CS as the left side, and the fourth side DS as the right side for illustration purposes.

[0036] As Figure 4 shown, the periphery of the display area of the display substrate is a border area BB, specifically including the opposite first side AS and second side BS, and the opposite third side CS and fourth side DS. Gate Driver on Array (GOA) is provided on both the third side CS and the fourth side DS, which is connected to a plurality of gate lines GATE to provide gate driving signals to each gate line GATE. However, the present disclosure is not limited thereto. For example, a single-sided drive can also be achieved by providing a gate driver array on only one of the third side CS and the fourth side DS. The first side AS is the side connected to a plurality of source driver chips SIC, a flexible printed circuit board FPC, and a timing controller TCON (such as a printed circuit board assembly PCBA extending along the first direction X as shown in Figure 4 ), and other components can also be provided on the first side AS. For example, a connector for connecting a plurality of source driver chips SIC to the corresponding data lines DATA is not limited in the present disclosure. Different from the uniform distribution of a plurality of source driver chips SIC provided on the first side in the display substrate of the related art as shown in Figure 1 , in the display substrate of the embodiment of the present disclosure as shown in Figure 4 , the first distance a1 between the two adjacent first source driver chips SIC1 and second source driver chips SIC2 closest to the gate driving circuit GOA in the first direction X is less than the second distance b between the two adjacent central source driver chips SICR1 and SICR2 closest to the center line CENTER of the display area in the first direction among a plurality of source driver chips.

[0037] In Figure 4In the illustrated embodiment, the display substrate includes opposite third side CS and fourth side DS. The first distance a1 between two adjacent first source driver chips SIC1 and second source driver chip SIC2 closest to the first gate driving array disposed on the third side CS and the third distance a2 between two adjacent fifth source driver chips SIC5 and sixth source driver chips SIC6 closest to the second gate driving array disposed on the fourth side DS in the first direction X are both less than the second distance b between two adjacent central source driver chips SICR1 and SICR2 closest to the center line CENTER of the display area in the first direction among the plurality of source driver chips, that is, the first distance, the third distance, and the second distance satisfy the relationship: a1 < b and a2 < b.

[0038] That is, on the opposite third side CS and fourth side DS of the display substrate, the first source driver chip SIC1 closest to the third side CS and the sixth source driver chip SIC6 closest to the fourth side DS both move in the direction of the center line CENTER of the display area of the display substrate to reduce the space occupied by the lateral edges of the source driver chips of the display panel.

[0039] In some embodiments, the first distance, the second distance, and the third distance may, for example, satisfy the relationship: a1 = a2 = Kb, where the range of K is from 1 / 4 to 3 / 4.

[0040] The present disclosure is not limited to moving the first source driver chip SIC1 and the sixth source driver chip SIC6 at the edges close to the gate driving circuit towards the center line of the display substrate, and the source driver chips at other positions may also move towards the center line. For example, the distance between two adjacent source driver chips closer to the center line CENTER is larger.

[0041] Due to the movement of the source driver chip SIC towards the center line, the spacing between the first source driver chip SIC1 and the second source driver chip SIC2 on the third side CS changes from b to a1, and the spacing between the fifth source driver chip SIC5 and the sixth source driver chip SIC6 on the fourth side DS changes from b to a2, where a1 < b and a1 < b. Then, the signal transmission lines required by the display panel and the signal transmission routes of other source driver chips will all move towards the center line direction. Therefore, the bonding size of the flexible and rigid printed circuit board (FOB) is reduced, the size of the printed circuit board PCBA in the first direction X is reduced, and the manufacturing cost of the printed circuit board PCBA is saved. In this disclosure, it is not limited to moving the first source driver chip SIC1 and the sixth source driver chip SIC6 on the third side CS and the fourth side DS of the display substrate towards the center line CENTER direction. For example, all other source driver chips SIC can also be moved towards the center line direction. For example, the distance between two adjacent source driver chips closer to the center line CENTER is larger, a1 < b1 < …… < b, a2 < b2 < …… < b, in order to reduce the bonding size of the flexible and rigid printed circuit board (FOB), thereby reducing the size of the printed circuit board PCBA in the first direction X.

[0042] This disclosure is not limited to the above embodiments. For example, among multiple source driver chips, except that the distance between the two adjacent source driver chips SICR1 and SICR2 closest to the center line CENTER in the first direction of the display area AA is the second distance b, the distance between any other two adjacent source driver chips in the first direction is the first distance a1, where a1 < b. In this embodiment, Figure 1 Based on the related technology shown, except that the distance between the two adjacent source driver chips SICR1 and SICR2 closest to the center line CENTER remains the second distance b, all other source driver chips are moved towards the center line CENTER direction, so that the distance between all other source driver chips except the source driver chips SICR1 and SICR2 is reduced to a1. In this way, all other source driver chips are moved towards the center line direction, thereby further releasing the space occupied by the left and right edges of the row where the source driver chips are located, providing a larger layout space for the routing of the signal transmission path.

[0043] As Figure 4As shown, in the display substrate of the embodiment of the present disclosure, the source driver chip SIC is moved towards the center line CENTER. For example, at least the first source driver chip SIC1 and the sixth source driver chip SIC6 near the third side and the fourth side are moved towards the center line CENTER, so that the size of the circuit board PCBA in the first direction can be reduced. For example, the edge of the circuit board PCBA near the third side CS can be indented towards the center line CENTER by a first reduction length ΔX1, and the edge of the circuit board PCBA near the fourth side DS can be indented towards the center line CENTER by a second reduction length ΔX2. For example, the first reduction length ΔX1 can be equal to the second reduction length ΔX2. When only the first source driver chip SIC1 is moved towards the center line CENTER, the first reduction length ΔX1 can be less than or equal to b - a1, that is, the reduced size of the circuit board PCBA can be less than or equal to the distance that the first source driver chip SIC1 moves towards the center line CENTER.

[0044] Figure 5 In the embodiment of the present disclosure shown, a plurality of source driver chips SIC arranged in sequence along the first direction X are provided on the lower side of the display substrate. In this embodiment, only the leftmost source driver chip SIC and the rightmost source driver chip SIC closest to the third side and the fourth side are moved towards the center line of the display substrate, that is, the first distance a1 between two adjacent source driver chips SIC near the third side and the third distance a2 between two adjacent source driver chips SIC near the fourth side are both smaller than the second distance b between the other two adjacent source driver chips SIC. In this case, as Figure 5 shown, the corresponding flexible printed circuit FPC near the third side can be indented accordingly, so that its width in the first direction X is reduced from L11 to L10, and the corresponding flexible printed circuit FPC near the fourth side can be indented accordingly, so that its width in the first direction X is reduced from L11 to L10, and the length of the corresponding circuit board in the first direction X can be reduced from Lpcbao to Lpcba. Figure 5 In the embodiment shown, the layout of the entire lower side of the display substrate provided with the circuit board, the flexible circuit connection board, and the source driver chip is moved towards the center of the display area, so that the space occupied by the entire lower side edge of the display substrate is released, and the lower border area of the display substrate is significantly reduced.

[0045] Figure 5 Only one embodiment is shown. However, the present disclosure is not limited thereto. Further, as Figure 4 shown, the first flexible printed circuit FPC1 corresponding to the first source driver chip SIC1 of the indented third side in the display substrate of the present disclosure will not be indented accordingly, but the first flexible printed circuit FPC1 is further expanded outwards. For example Figure 4As shown, the length of the first flexible printed circuit board FPC1 near the third side expands from the second length L2 to the first length L1 in the first direction X, so that the positive projection of the edge of the signal board PCBA closest to the gate driving circuit GOA on the first side AS of the display substrate is located between the positive projection of the edge of the plurality of flexible printed circuit boards closest to the gate driving circuit GOA on the first side AS of the display substrate and the positive projection of the edge of the plurality of source driving chips closest to the gate driving circuit on the first side of the display substrate. That is, the first flexible printed circuit board FPC1 protrudes towards the third side relative to the first source driving chip SIC1 and the signal board PCBA. The part where the first flexible printed circuit board FPC1 protrudes relative to the first source driving chip SIC1 is called the first protruding part. Similarly, the sixth flexible printed circuit board FPC6 protrudes towards the fourth side relative to the sixth source driving chip SIC6 and the signal board PCBA. The part where the sixth flexible printed circuit board FPC6 protrudes relative to the sixth source driving chip SIC6 is called the second protruding part.

[0046] As Figure 4 shown, in the embodiment of the present disclosure, the display substrate further includes a first set of leads on the third side CS, and the display substrate further includes a second set of leads on the fourth side DS. Both the first set of leads and the second set of leads include a plurality of leads. Each lead extends from its corresponding first source driving chip SIC1 or sixth source driving chip SIC6 to the first flexible printed circuit board FPC1 or the sixth flexible printed circuit board FPC6 as shown by the arrow D direction and extends a certain length therein and then leads out to the corresponding gate driving circuit GOA. Reference may also be made to Figure 6 the part at B in Figure 7 and the enlarged view of B shown.

[0047] Specifically, as Figure 4 shown, each lead may include at least three sections, a first section S1, a second section S2, and a third section S3. At a position near the third side CS, the first section S1 extends from the first source driving chip SIC1 and extends along a second direction Y that generally intersects the first direction X. The second section S2 extends along the first direction X in the first flexible printed circuit board FPC1 of the gate driving circuit GOA closest to the third side CS. The third section S3 extends out from the flexible printed circuit board along the second direction Y and is electrically connected to the gate driving circuit GOA closest to the third side CS. As Figure 4As shown, the first width W1 of each lead along the first direction in the first section S1 is less than the second width W2 of each lead in the second direction in the second section S2 and / or less than the third width W3 of each lead in the third section S3; similarly, at a position close to the fourth side DS, the first section S1 extends from the sixth source driver chip SIC6 and extends along a second direction Y that substantially intersects the first direction X, the second section S2 extends along the first direction X in the sixth flexible printed circuit board FPC6 of the gate driver circuit GOA closest to the fourth side DS, and the third section S3 extends from the sixth flexible printed circuit board FPC6 along the second direction Y and is electrically connected to the gate driver circuit GOA closest to the fourth side DS.

[0048] As Figure 4 shown, since at least the first source driver chip SIC1 close to the third side CS and the sixth source driver chip SIC6 close to the fourth side DS move in the central direction, and the main part of the leads is arranged in the flexible printed circuit board with a larger size in the second direction Y, the first width W1 of each lead along the first direction in the first section S1 and the second width W2 of each lead in the second direction in the second section S2 can both be designed to be larger. For example, the line width can be made greater than or equal to 50 μm, and the distance between two adjacent wirings can be set to 50 μm. Increasing the line width of the signal transmission path can thus reduce the load resistance of the signal transmission path. In one embodiment, the first width W1 and the second width W2 can be set to be equal according to process conditions and can be set to be both greater than the third width W3 of each lead in the third section S3.

[0049] As Figure 7 shown, in the display substrate of the embodiment of the present disclosure, the first source driver chip SIC1 closest to the left side (third side CS) moves a distance of b - a from the third side towards the center line CENTER of the display substrate. These reserved spaces can be used to accommodate signal transmission lines to increase the width of each signal transmission lead and reduce the load resistance of the lead, thereby improving the reliability of signal transmission and ensuring the display quality of the display panel.

[0050] As Figure 4 shown, further, each group of leads further includes a fourth section S4. One end of each lead in the fourth section S4 is connected to the first section S1 through a connection point N1 between the first section S1 and the second section S2, and the other end is connected to the first flexible printed circuit board FPC1 for testing the signals transmitted in the above first section, second section, and third section. As Figure 4As shown, the fourth width W4 of each lead in the fourth section S4 along the second direction Y can be set to be equal to the second width W2. Since both the second section S2 and the fourth section S4 extend along the first flexible printed circuit board FPC1, and since the width of the first flexible printed circuit board FPC1 in the second direction Y is relatively large, relatively wide leads can be set to reduce the load resistance of the signal transmission line.

[0051] Further as Figure 4 shown, in addition to including the outer lead bonding pads OLB, the first source driver chip SIC1 also includes a signal input terminal IN. The GOA signals related to the gate driver circuit GOA in the signal board PCBA are introduced into the first source driver chip SIC1 through the signal input terminal IN after passing through the corresponding first flexible printed circuit board FPC1. After level conversion in the first source driver chip SIC1, the level-converted GOA signals related to the gate driver circuit GOA are introduced into the corresponding gate driver circuit GOA through the outer lead bonding pads OLB in sequence via the first section S1, the second section S2, and the third section S3.

[0052] As Figure 7 shown, the first source driver chip SIC1 near the third side CS is indented by a distance b - a towards the center line CENTER of the display substrate. The remaining edge space is used to better layout the leads, so that the lead width of the signal transmission path of the GOA signal output from the outer lead bonding pads OLB of the first source driver chip SIC1 can be increased, and the widened signal transmission path can be further laid out in the first flexible printed circuit board FPC1. Therefore, the load resistance of the transmission path of the GOA signal is reduced, ensuring the reliability and accuracy of signal transmission, and thus also ensuring the display quality.

[0053] Based on the above, in the display substrate of the present disclosure, as Figure 4 and Figure 5 shown, a new layout of the driver chips is adopted, so that the source driver chips closest to the left and right gate driver circuits GOA are arranged to move towards the center line CENTER of the display substrate, causing the source driver chips SIC at the edges to move towards the center. At the same time, the GOA signals output from the outer lead bonding pads OLB of the source driver chips SIC or other signals of the display substrate are transmitted to the display substrate through the corresponding flexible printed circuit board FPC. As Figure 4As shown, the GOA signal traces extending in the flexible printed circuit board (FPC) passing through the edge are made wider, thereby reducing the load resistance (RC loading) and solving the problem of the increase in the load resistance RC loading caused by the lengthening of the GOA traces due to the movement of the source driver chip towards the center. In this way, not only can the size of the printed circuit board assembly (PCBA) in the first direction X be reduced, but also the load resistance of the GOA signal transmission line can be decreased, thus improving the display quality of the display substrate.

[0054] In a second aspect of the present disclosure, embodiments of the present disclosure further provide a display panel, including the display substrate in any of the above embodiments and an opposing substrate opposed thereto, and the opposing substrate is, for example, a color filter substrate.

[0055] In a display panel including the display substrate as in the above embodiments, at least the source driver chips provided in the edge region below the display area are moved towards the center line direction of the display area. With such a design, on the one hand, since the source driver chips at the edge are moved towards the center, the length of the circuit board, such as the timing controller, that provides various signals to the display panel can be reduced, thereby reducing the manufacturing cost; on the other hand, the trace width of the transmission path of the GOA signal provided from the circuit board of the timing controller to the gate driver circuit can be increased, thereby reducing the load circuit of the signal transmission path, reducing the loss of the signal by the transmission path, and improving the display quality of the display panel.

[0056] In a third aspect of the present disclosure, embodiments of the present disclosure further provide a display device, including the above display substrate. It should be noted that the display device provided in this embodiment can be: any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device are understood to be possessed by those of ordinary skill in the art and will not be elaborated here, nor should they be regarded as a limitation of the present invention.

[0057] Furthermore, the display device can also include various types of display devices, such as a liquid crystal display device, an organic electroluminescent (OLED) display device, a mini light-emitting diode (Mini LED) display device, which are not limited herein.

[0058] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present disclosure, and the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. A display substrate includes a display area and a border area disposed around the display area, wherein, a plurality of pixels are disposed in the display area; the border area includes: a gate driving circuit located on at least one of the opposite sides of the border area, configured to provide a gate driving signal for the plurality of pixels; and a source driving circuit located on a first side adjacent to the at least one side of the border area, configured to provide a display signal for the plurality of pixels, the source driving circuit including a plurality of source driving chips arranged in sequence along a first direction on the first side of the border area; and a first distance between two adjacent source driving chips closest to the gate driving circuit in the first direction is less than a second distance between two adjacent source driving chips closest to the center line of the display area in the first direction among the source driving chips.

2. The display substrate according to claim 1, further comprising a plurality of flexible circuit boards and a signal board; wherein, the plurality of flexible circuit boards are located on the first side of the border area and on a side of the source driving circuit away from the display area, and the plurality of flexible circuit boards are electrically connected to the plurality of source driving chips one by one; and the signal board is located on the first side of the border area and on a side of the plurality of flexible circuit boards away from the display area, and is electrically connected to the plurality of flexible circuit boards to provide signals from the signal board to the source driving circuit and the gate driving circuit through the plurality of flexible circuit boards; wherein, a positive projection of an edge of the signal board closest to the gate driving circuit on the first side of the display substrate is closer to the center line of the display area in the first direction than a positive projection of an edge of the plurality of flexible circuit boards closest to the gate driving circuit on the first side of the display substrate.

3. The display substrate according to claim 2, wherein, a positive projection of an edge of the signal board closest to the gate driving circuit on the first side of the display substrate is between a positive projection of an edge of the plurality of flexible circuit boards closest to the gate driving circuit on the first side of the display substrate and a positive projection of an edge of the plurality of source driving chips closest to the gate driving circuit on the first side of the display substrate.

4. The display substrate according to claim 2, further comprising at least one set of leads respectively corresponding to the at least one side, wherein, each set of leads includes a plurality of leads, and the at least one set of leads is led out from its corresponding source driving chip to its corresponding flexible circuit board, extends a first length along the first direction in the flexible circuit board and then is led out and electrically connected to the corresponding gate driving circuit.

5. The display substrate according to claim 4, wherein, Each set of leads includes at least three sections, and the at least three sections include a first section, a second section, and a third section. The first section extends from the corresponding source driver chip to the corresponding flexible circuit board along a second direction that generally intersects the first direction. The second section extends in the corresponding flexible circuit board along the first direction. The third section extends out from the flexible circuit board in the second direction and is then electrically connected to the corresponding gate driver circuit, so as to transmit the signal after being level-converted by the corresponding source driver chip for the driving signal of the gate driver circuit in the signal board successively through the first section, the second section, and the third section to the gate driver circuit; and The first width of each lead in the first direction in the first section and / or the second width of each lead along the second direction in the second section is greater than the third width of each lead along the first direction in the third section.

6. The display substrate according to claim 5, wherein, The first width is equal to the second width.

7. The display substrate according to claim 5, wherein, The at least three sections further include a fourth section, one end of which is connected to a position between the first section and the second section, and the other end of which is connected to the flexible circuit board to test the signal after being level-converted by the corresponding source driver chip.

8. The display substrate according to claim 7, wherein, The fourth width of each lead in the fourth section along the second direction is equal to the second width and / or the third width.

9. The display substrate according to any one of claims 2 to 8, wherein, The at least one side includes opposite third and fourth sides, and the gate driver circuit includes a first gate driver array disposed on the third side and a second gate driver array on the fourth side respectively; The distance between the two source driver chips closest to the third side among the multiple source driver chips is a first distance a1, the distance between the two source driver chips closest to the fourth side is a third distance a2, and the distance between two adjacent source driver chips closest to the center line of the display area in the first direction among the source driver chips is a second distance b; and The first distance, the third distance, and the second distance satisfy the relationship: a1 < b and a2 < b.

10. The display substrate according to claim 9, wherein, The first distance, the second distance, and the third distance satisfy the relationship: a1 = a2 = Kb, where the range of K is 1 / 4 to 3 / 4.

11. The display substrate according to claim 9, wherein, Among the multiple source driver chips, the distance between two adjacent source driver chips closer to the center line is greater.

12. The display substrate according to any one of claims 2 to 8, wherein, Among the multiple source driver chips, except that the distance between two adjacent source driver chips closest to the center line of the display area in the first direction is the second distance b, the distance between any other two adjacent source driver chips in the first direction is the first distance a1, where a1 < b.

13. The display substrate according to claim 9, wherein, The widths of the orthographic projections in the first direction of the first flexible circuit board closest to the third side and the sixth flexible circuit board closest to the fourth side among the multiple flexible circuit boards are greater than the widths of the orthographic projections in the first direction of each of the other flexible circuit boards.

14. A display panel, comprising the display substrate according to any one of claims 1 to 13 and a color filter substrate disposed opposite to the display substrate.

15. A display device, comprising the display panel according to claim 14.

Images