CN111948859B

CN111948859B - Display substrate and display device

Info

Publication number: CN111948859B
Application number: CN201910414571.2A
Authority: CN
Inventors: 王敏; 许睿; 李少波; 田超; 王光泉; 王哲; 龚猛; 卢永春
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2023-07-21
Anticipated expiration: 2039-05-17
Also published as: CN111948859A; CN116719188A; CN116736587A

Abstract

A display substrate and a display device are provided. The display substrate includes: the semiconductor device includes a substrate base, a first signal line, and a transmission line. The substrate base plate comprises a display area and a peripheral area surrounding the display area; the first signal line is positioned in the display area and extends along a first direction; each transmission line comprises a first transmission line positioned in the display area, the first transmission line extends along the second direction, and each first signal line is electrically connected with a corresponding first transmission line. The transmission line electrically connected with the first signal line through the first transmission line further comprises a second transmission line which is positioned in the peripheral area and is electrically connected with the first transmission line, the resistance from the electric connection point of the first signal line electrically connected with the first transmission line to the end point of the second transmission line far away from the first transmission line electrically connected with the second transmission line is the transmission resistance of the transmission line, and the transmission resistances of the transmission lines are equal. The display substrate in the embodiment of the disclosure can save the space of the peripheral area to realize the design of a narrow frame and can also ensure the uniformity of display pictures.

Description

Display substrate and display device

Technical Field

At least one embodiment of the present disclosure relates to a display substrate and a display device.

Background

Currently, ultra-thin, ultra-narrow frame and even borderless display devices are receiving more and more attention, and thus many manufacturers are developing to make ultra-narrow frame and even borderless display devices.

Disclosure of Invention

At least one embodiment of the present disclosure provides a display substrate and a display device.

At least one embodiment of the present disclosure provides a display substrate including: a substrate including a display region and a peripheral region surrounding the display region; a plurality of first signal lines located in the display area and extending along a first direction; and a plurality of transmission lines, each transmission line including a first transmission line located in the display area, the first transmission line extending along a second direction, the first transmission line intersecting the first signal line, each first signal line being electrically connected to a corresponding one of the first transmission lines, and an electrical connection point between the first signal line and the corresponding one of the transmission lines being located at an intersection point between the first signal line and the corresponding one of the first transmission lines. The number of the first transmission lines is not smaller than the number of the first signal lines, the transmission lines electrically connected with the first signal lines through the first transmission lines further comprise second transmission lines which are positioned in the peripheral area and electrically connected with the first transmission lines, the resistance from the electrical connection point of the first signal lines electrically connected with the first transmission lines to the end points, far away from the first transmission lines electrically connected with the second transmission lines, of the second transmission lines is the transmission resistance of the transmission lines, and the transmission resistances of the transmission lines are equal.

For example, the display substrate further includes: a plurality of second signal lines extending in the second direction; and a binding area located in a peripheral area of one side of the display area along the second direction, the second transmission line being located in the binding area. One of the first signal line and the second signal line is a data line, the other is a grid line, and the first signal line is electrically connected with the driving chip through an endpoint of the second transmission line, which is far away from the first transmission line and is electrically connected with the first signal line.

For example, the length of the second transmission line electrically connected to the first signal line decreases as the shortest distance between the first signal line and the bonding region increases.

For example, the electrical connection points are distributed on at least one side of a center line of the display area extending in the second direction, and the first signal lines electrically connected to the electrical connection points located on either side of the center line are uniformly distributed in the second direction.

For example, the electrical connection points are distributed on at least one side of a center line of the display area extending in the second direction, and distances from the center line to the electrical connection points located on either side of the center line increase as a shortest distance from the electrical connection points to the bonding area decreases.

For example, the electrical connection point of the first signal lines of the odd-numbered rows is located at one side of the center line, the electrical connection point of the first signal lines of the even-numbered rows is located at the other side of the center line, and the first signal lines of the adjacent odd-numbered rows are electrically connected to the adjacent second transmission lines, respectively, and the first signal lines of the adjacent even-numbered rows are electrically connected to the adjacent second transmission lines, respectively.

For example, the number of the second transmission lines is the same as the number of the first signal lines, and the first signal lines are electrically connected to the second transmission lines through the first transmission lines in one-to-one correspondence.

For example, adjacent first signal lines are electrically connected to adjacent second transmission lines, respectively.

For example, the display region includes two sub-display regions independent of each other along the first direction, and the adjacent first signal lines within each of the sub-display regions are electrically connected to the adjacent second transmission lines, respectively; the electrical connection points in the two sub-display areas are symmetrically distributed relative to a central line of the display area extending along the second direction; or, in the sub display area, the distance between the electric connection point and the center line of the sub display area along the second direction increases along with the decrease of the shortest distance between the electric connection point and the area where the second transmission line is located.

For example, the display substrate further includes: the pixels are located in the display area and are arranged in an array mode along the first direction and the second direction, each pixel comprises a thin film transistor, a control electrode of each thin film transistor is connected with the grid line, and one of source and drain electrodes of each thin film transistor is connected with the data line. The pixels arranged along the second direction are in one-to-one correspondence with the plurality of first signal lines, and the number of the first transmission lines corresponding to any two pixels arranged along the first direction is the same.

For example, the number of pixels arranged in the second direction is M, and the number of pixels arranged in the first direction is N; when the value of M/N is a positive integer M, a row of pixels arranged along the second direction corresponds to M first transmission lines; when the value of M/N is a non-integer and the integer part is M, a row of pixels arranged along the second direction corresponds to (m+1) the first transmission lines, and M and N are both positive integers.

For example, when the value of M/N is a non-integer, the first transmission line includes a dummy line and a signal transmission line electrically connected to the second transmission line, the number of signal transmission lines and the number of first signal lines are both M, and the number of dummy lines is N (m+1) -M.

For example, the dummy line is located on a side of the signal transmission line farthest from a center line of the display area extending in the second direction, the side being away from the center line.

For example, when the value of M/N is a non-integer, N columns of pixels arranged along the first direction are divided into N columns of pixel groups, the value of M/N is a positive integer s, each column of pixel groups corresponds to s first transmission lines, the number of the first transmission lines and the number of the first signal lines are both M, and N is a positive integer smaller than N.

For example, the lengths of the first transmission lines are the same.

For example, a portion of the first transmission line remote from the electrical connection point from the second transmission line is insulated from the electrical connection point.

For example, the intersection point where the first transmission line and at least two first signal lines intersect includes the electrical connection point and a virtual connection point without electrical connection, the first conductive layer where the first signal line is located on one side, close to the substrate, of the second conductive layer where the first transmission line is located, an insulating layer is included between the first conductive layer and the second conductive layer, the insulating layer includes a via hole, the first transmission line is electrically connected with the corresponding first signal line through the via hole to form the electrical connection point, a spacer layer is further included between the first conductive layer and the second conductive layer at the virtual connection point, and the thickness of the spacer layer is the same as that of the insulating layer.

At least one embodiment of the present disclosure provides a display device including the above display substrate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure, not to limit the present disclosure.

FIG. 1A is a schematic view of a partial structure of a display substrate according to an example of an embodiment of the disclosure;

FIG. 1B is a partial schematic diagram of a second transmission line provided by an example of an embodiment of the present disclosure;

FIG. 1C is a schematic diagram illustrating an electrical connection relationship between a first transmission line and a first signal line according to another example of an embodiment of the present disclosure;

FIG. 2A is a schematic view showing a partial structure of a display substrate including the transmission line shown in FIG. 1A;

fig. 2B and 2C are schematic partial structures of a display substrate according to another example of an embodiment of the disclosure;

FIG. 3A is a schematic view of a partial structure of a display substrate including the transmission line and the distribution of electrical connection points shown in FIG. 1A;

FIG. 3B is a schematic layout diagram of the first transmission line after dividing the pixels shown in FIG. 3A into a plurality of pixel groups;

fig. 4 is a schematic partial structure of a display substrate according to another embodiment of the disclosure;

FIG. 5A is a schematic cross-sectional view of the electrical connection point shown in FIG. 1A; and

fig. 5B is a schematic cross-sectional view at the virtual connection point shown in fig. 1A.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.

In the study, the inventors of the present application found that: in the substrate structure of the display device, a fan-shaped (fanout) wiring connected to the signal line occupies a wider frame in the peripheral region, and particularly when the display device is a high-resolution display device, the fan-shaped wiring makes the frame wider. The display device comprising the fan-shaped wiring design has a relatively small display area occupation due to a relatively wide frame, and has poor user experience. Thus, a narrow bezel design includes: the fan-shaped wiring connected with the data lines is led out from the display area (AA area) to reduce the frames on the left side and the right side of the display area, so that the occupation ratio of the display area to the display panel is increased, and a user can obtain better experience. However, in the above-mentioned narrow frame design, the distance between the electrical connection points of the adjacent fan-shaped wirings and the data lines in the display area is relatively long, which easily causes a relatively large difference in total resistance between the adjacent fan-shaped wirings, so that the display quality of the display screen is affected due to non-uniformity of the display panel, and the user may generate a flickering effect visually.

Embodiments of the present disclosure provide a display substrate and a display device. The display substrate comprises a substrate, a plurality of first signal lines and a plurality of transmission lines, wherein the first signal lines and the transmission lines are arranged on the substrate. The substrate base plate comprises a display area and a peripheral area surrounding the display area; the plurality of first signal lines are positioned in the display area and extend along a first direction; each transmission line comprises a first transmission line positioned in the display area, the first transmission line extends along the second direction, the first transmission line is arranged in a crossing way with the first signal line, each first signal line is electrically connected with a corresponding first transmission line, and the electric connection point of the first signal line and the corresponding first transmission line is positioned at the crossing point of the first signal line and the corresponding first transmission line. The number of the first transmission lines is not smaller than the number of the first signal lines, the transmission lines electrically connected with the first signal lines through the first transmission lines further comprise second transmission lines which are positioned in the peripheral area and electrically connected with the first transmission lines, the resistance from an electrical connection point of the first signal lines electrically connected with the first transmission lines to an endpoint of the second transmission lines far away from the first transmission lines electrically connected with the second transmission lines is the transmission resistance of the transmission lines, and the transmission resistances of the transmission lines are equal. In the display substrate provided by the embodiment of the disclosure, the first transmission line for transmitting signals for the first signal line is arranged in the display area, so that the space of the peripheral area can be saved to realize the design of a narrow frame; and, through setting the transmission resistance of arbitrary two transmission lines to equal, can also guarantee the homogeneity of display frame in order to guarantee the quality of display frame, and then provide good viewing experience for the user.

The display substrate and the display device provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

Fig. 1A is a schematic partial structure of a display substrate according to an example of an embodiment of the disclosure. As shown in fig. 1A, a display substrate provided in an embodiment of the present disclosure includes a substrate 100, a plurality of first signal lines 200 and a plurality of transmission lines 300 on the substrate 100. The substrate 100 includes a display region 110 and a peripheral region 120 surrounding the display region 110. The first signal line 200 is located in the display area 110 and extends along a first direction (i.e., the X direction shown in fig. 1A). Each of the transmission lines 300 includes a first transmission line 310 located in the display area 110, the first transmission line 310 extending in a second direction (i.e., the Y direction shown in fig. 1A). The second direction intersects the first direction, for example, the first direction is perpendicular to the second direction, and the first direction and the second direction are respectively two directions perpendicular to each other in the same plane. For example, the plane is a plane parallel to the substrate base plate.

As shown in fig. 1A, each first signal line 200 is electrically connected to a corresponding one of the first transmission lines 310, i.e., a different first signal line 200 is electrically connected to a different first transmission line 310. The number of the first transmission lines 310 in the embodiment of the present disclosure is not less than the number of the first signal lines 200, that is, the number of the first transmission lines 310 may be equal to the number of the first signal lines 200 or may be greater than the number of the first signal lines 200.

For example, the first signal line 200 and the first transmission line 310 are located at different layers, and an insulating layer is disposed between the layer where the first signal line 200 is located and the layer where the first transmission line 310 is located. The electrical connection between the first signal line 200 and the corresponding first transmission line 310 means that the first transmission line 310 may be electrically connected to the first signal line 200 through a via hole disposed on an insulating layer located between the first signal line and the corresponding first transmission line, that is, the insulating layer at the position of the electrical connection point 331 is provided with a via hole. For example, the first transmission line 310 contacts the first signal line 200 at the via hole position to achieve electrical connection.

For example, one first signal line 200 may intersect with a plurality of first transmission lines 310 to form a plurality of intersecting points 330, but only one intersecting point 330 of the plurality of intersecting points 330 is an electrical connection point 331 between the first signal line 200 and the first transmission lines 310, and the other intersecting points 330 are virtual connection points 332 without electrical connection. I.e. the first signal line 200 and the first transmission line 310 are insulated from each other at the location of the virtual connection point 332, for example by an insulating layer therebetween.

As shown in fig. 1A, the transmission line 300 electrically connected to the first signal line 200 further includes a second transmission line 320 located at the peripheral region 120, and the second transmission line 320 is electrically connected to the first transmission line 310. For example, if the number of the transmission lines 300 is greater than the number of the first signal lines 200, the transmission lines 300 that are not electrically connected to the first signal lines 200 include only the first transmission lines 310 and do not include the second transmission lines 320; when the number of the transmission lines 300 is the same as the number of the first signal lines 200, each transmission line 300 includes a first transmission line 310 and a second transmission line 320.

As shown in fig. 1A, the second transmission line 320 is connected to the first driving chip 510 away from the end 301 of the first transmission line 310, and the signal provided by the first driving chip 510 is transmitted to the electrical connection point 331 through the second transmission line 320 and the first transmission line 310 to transmit the signal to the first signal line 200. The resistance of the transmission line 300 from the electrical connection point 331 to the end point 301 of the second transmission line 320 is the transmission resistance of the transmission line 300 influencing the signal transmission process, that is, the resistance from the electrical connection point 331 of the first signal line 200 electrically connected to the first transmission line 310 to the end point 301 of the second transmission line 320 distant from the first transmission line 310 electrically connected thereto is the transmission resistance of the transmission line 300, and the transmission resistances of any two transmission lines 300 electrically connected to the first signal line 200 are equal. Equal here includes strictly equal and approximately equal, and approximately equal means that the ratio of the difference in transmission resistance of any two transmission lines to any one transmission resistance is not more than 10%.

In the display substrate provided by the embodiment of the disclosure, the first transmission line for transmitting signals for the first signal line is arranged in the display area, so that the space of the peripheral area can be saved, and the design of a narrow frame can be realized. And, through setting the transmission resistance of arbitrary two transmission lines to equal, can also guarantee the homogeneity of display frame in order to guarantee the quality of display frame, and then provide good viewing experience for the user.

In the embodiment of the disclosure, the widths of the transmission lines along the X direction are substantially the same, and the transmission resistance of the transmission lines is determined by the lengths of the transmission lines.

For example, the first transmission line 310 and the second transmission line 320 being electrically connected may mean that both are located at different layers and are electrically connected through a via. Of course, the first transmission line 310 and the second transmission line 320 may be electrically connected, and the two may be located on the same layer, for example, the transmission line 300 including the first transmission line 310 and the second transmission line 320 may be an entire wiring, and the portion of the transmission line 300 located in the display area 110 is the first transmission line 310, and the portion located in the peripheral area 120 is the second transmission line 320. The embodiments of the present disclosure are not limited thereto, and the first transmission line and the second transmission line may be two independent and electrically connected wirings as long as they can function to transmit signals to the first signal line.

For example, as shown in fig. 1A, the number of the second transmission lines 320 is the same as the number of the first signal lines 200, and the first signal lines 200 are electrically connected to the second transmission lines 320 in a one-to-one correspondence through the first transmission lines 310.

For example, as shown in fig. 1A, in the Y direction, the minimum distance between the electrical connection point 331 of the first signal line 200 and the region 302 where the second transmission line 320 is located increases with the increase of the minimum distance between the first signal line 200 and the region 302 where the second transmission line 320 is located. The minimum distance between the electrical connection point (or the first signal line) and the area where the second transmission line is located refers to the distance between the electrical connection point (or the first signal line) and the boundary between the area where the second transmission line is located, which is close to the display area side, and the boundary may refer to the boundary between the display area and the peripheral area. For example, the second transmission line is located at the bonding region, and the length of the second transmission line electrically connected to the first signal line decreases as the shortest distance between the first signal line and the bonding region increases. The bonding area here includes the area where the second transmission line is located.

For example, as shown in fig. 1A, the second transmission line 320 is located at one side of the display area 110 along the second direction, and the length of the second transmission line 320 electrically connected to the first signal line 200 decreases as the distance of the first signal line 200 from the area 302 where the second transmission line 320 is located increases.

For example, as shown in fig. 1A, in the direction indicated by the arrow in the Y direction, the electrical connection point 331 on the first signal line 200 (the first signal line closest to the bonding area) is the shortest distance from the area 302 where the second transmission line 320 is located, and the first transmission line 310 electrically connected to the first signal line 200 has the smallest resistance affecting the transmission signal, while the second transmission line 320 electrically connected to the first transmission line 310 has the longest length and the largest resistance. As the distance of the first signal line 200 from the region 302 where the second signal line 320 is located increases, the resistance of the first signal line 310 electrically connected to the first signal line 200 affecting the transmission signal gradually increases, and the length of the second signal line 320 electrically connected to the first signal line 200 gradually decreases, and the resistance gradually decreases. Accordingly, the total resistance of the first transmission line 310 and the second transmission line 320 electrically connected to each of the first signal lines 200, which affects the transmission signal, is substantially equal. That is, the transmission resistances of the transmission lines 300 electrically connected to the first signal lines 200 are substantially equal.

For example, as shown in fig. 1A, the electrical connection points 331 are distributed on at least one side of the center line 101 extending in the second direction of the display area 110, and the distance between the electrical connection points 331 located on either side of the center line 101 and the center line 101 increases as the shortest distance between the electrical connection points 331 and the area 302 where the second transmission line 320 is located decreases. That is, the closer to the center line 101, the greater the shortest distance of the electrical connection point 331 from the region 302 where the second transmission line 320 is located.

For example, fig. 1B is a partial schematic diagram of a second transmission line provided by an example of an embodiment of the present disclosure. As shown in fig. 1A and 1B, the first driving chip (e.g., a flip-chip film chip, etc.) 510 is located at the middle of the peripheral region 120 along the X direction, and if the size is smaller, the second transmission line 320 located at the middle of the peripheral region 120 is smaller in size and smaller in resistance, and the second transmission lines 320 located at both sides of the middle of the peripheral region 120 are longer in size and larger in resistance. According to the embodiment of the disclosure, the electric connection points of the first transmission lines corresponding to the second transmission lines positioned in the middle of the peripheral area are arranged at positions far away from the region where the second transmission lines are positioned, so that the influence of resistance differences among the second transmission lines positioned at different positions of the peripheral area on signals transmitted to the first signal lines can be reduced, the differences among the transmission resistances of the transmission lines electrically connected with the first signal lines are extremely small, the uniformity of display pictures of a display device comprising the display substrate can be ensured, and the quality of the display pictures is further ensured.

For example, as shown in fig. 1B, a portion of the second transmission line 320 electrically connected to the first transmission line 310 includes a straight line segment region 311, and each of the second transmission lines 320 located in the straight line segment region 311 extends in the Y direction. In order to avoid a short circuit or a short circuit of the transmission line located at the boundary between the display area and the peripheral area due to a process deviation, when the second transmission line is routed, a portion of the second transmission line near the display area may be designed as a routing line having the same extension direction as the extension direction of the first transmission line.

The wiring manner of the second transmission line 320 shown in fig. 1B is a direct wiring manner, and the length of the second transmission line 320 is designed to match the distance between the electrical connection point 331 on the first transmission line 310 and the area 302 where the second transmission line 320 is located, so as to match the resistance that affects the signal with the first transmission line 310, thereby ensuring that the transmission resistances on different transmission lines are approximately equal, ensuring that the transmission resistance on each transmission line is smaller, and improving the display uniformity of the display device while reducing the power consumption.

For example, in the practical process, in consideration of the cost saving and power consumption reduction, the wiring manner of the second transmission line shown in fig. 1B may be adopted, and the position of the electrical connection point on the first transmission line in the display area may be designed according to the wiring manner of the second transmission line, so as to ensure that the transmission resistances of any two transmission lines are equal.

For example, as shown in fig. 1A, the electrical connection points 331 are distributed on at least one side of the center line 101 extending in the second direction of the display area 110, and the distances between the first signal lines 200 electrically connected to any adjacent two of the first transmission lines 310 located on either side of the center line 101 are equal to reduce the probability of non-uniformity of the display screen of the display device including the display substrate. That is, the first signal lines 200 electrically connected to the electrical connection points 331 located on either side of the center line 101 are uniformly distributed along the second direction, where uniform distribution means that distances between adjacent first signal lines 200 electrically connected to the electrical connection points 331 are all the same.

For example, as shown in fig. 1A, the electrical connection point 331 of the first signal line 200 of the odd-numbered row is located at one side of the center line 101, the electrical connection point 331 of the first signal line 200 of the even-numbered row is located at the other side of the center line 101, and the first signal lines 200 of the adjacent odd-numbered row are electrically connected to the adjacent second transmission lines 320, respectively, and the first signal lines 200 of the adjacent even-numbered row are electrically connected to the adjacent second transmission lines 320, respectively. That is, when the number of first transmission lines 310 is the same as the number of first signal lines 200, the first signal lines 200 of the adjacent odd-numbered rows are electrically connected to the adjacent first transmission lines 310, respectively, and the first signal lines 200 of the adjacent even-numbered rows are electrically connected to the adjacent first transmission lines 310, respectively.

Fig. 1A schematically illustrates a case where the first transmission lines are in one-to-one correspondence with the first signal lines, but is not limited thereto. When the number of the first transmission lines is larger than that of the first signal lines, the first transmission lines include dummy lines and signal transmission lines electrically connected to the first signal lines, and the dummy lines are not electrically connected to any of the first signal lines. The first signal lines of adjacent odd (even) numbered rows are electrically connected to the adjacent signal transmission lines, respectively, but the first signal lines of adjacent odd (even) numbered rows are not necessarily electrically connected to the adjacent first transmission lines, and a dummy line may be provided between the adjacent signal transmission lines.

For example, as shown in fig. 1A, the distance from the center line 101 of the electrical connection point 331 of the first signal line 200 located in the even-numbered row decreases as the distance from the area where the second transmission line 320 is located increases, and the distance from the center line 101 of the electrical connection point 331 of the first signal line 200 located in the odd-numbered row decreases as the distance from the area where the second transmission line 320 is located increases. The arrangement shape of the electrical connection points 331 on the first signal lines 200 sequentially arranged in the direction indicated by the arrow in the Y direction is a "spiral shape". Of course, the arrangement shape of the electrical connection points of the first signal lines and the first transmission lines is not limited to the spiral shape, as long as it is sufficient that the transmission resistances of the respective transmission lines electrically connected to the first signal lines are substantially equal.

In the example shown in fig. 1A, the difference between the distances between the electrical connection points 331 on the adjacent first transmission lines 310 located on the same side of the center line 101 and the area 302 where the second transmission lines 320 are located is the distance between the adjacent odd (even) rows of first signal lines 200, that is, the distances between the electrical connection points 331 on the first transmission lines 310 located on the same side of the center line 101 and arranged along the X direction and the area 302 where the second transmission lines 320 are located are equal, so that the difference between the resistances affecting the transmission signals on any two adjacent first transmission lines 310 is equal, and the difference between the resistances on the first transmission lines 310 located on the same side of the center line 101 and arranged along the X direction is changed, which is beneficial to improving the uniformity of the display screen.

When the difference value of resistances on the first transmission lines arranged in the X direction on the same side of the center line changes, resistances on the second transmission lines electrically connected to the first transmission lines also change substantially equally so as to achieve substantially equal transmission resistances on the respective transmission lines. In the actual process, when the resistance of the second transmission line arranged along the extending direction of the first signal line is gradually changed, if the distance between the electric connection point on the first transmission line electrically connected with the second transmission line and the area where the second transmission line is located in the display area is not gradually changed, the display picture is not uniform due to the larger difference of the resistances of the adjacent transmission lines affecting the transmission signal. According to the embodiment of the disclosure, the distribution of the electric connection points on the first transmission line can be designed according to the change rule of the resistance on the second transmission line, so that the uniformity of a display picture is ensured.

For example, as shown in fig. 1A, the lengths of the first transmission lines 310 are substantially the same. For example, the length of each first transmission line 310 along the Y direction is the length of the display area 110 along the Y direction, i.e., the number of intersections of each first transmission line 310 with the first signal line 200 is the same.

For example, fig. 1C is a schematic diagram of an electrical connection relationship between a first transmission line and a first signal line provided in another example of an embodiment of the disclosure. As shown in fig. 1C, a portion of the first transmission line 310 located at the electrical connection point 331 away from the region 302 where the second transmission line 320 is located is insulated from the electrical connection point 331. That is, a portion of the first transmission line 310 remote from the electrical connection point 331 from the second transmission line 320 is insulated from the electrical connection point 331.

For example, as shown in fig. 1C, the first transmission line 310 electrically connected to the first signal line 200 includes a first sub transmission line and a second sub transmission line spaced apart from each other, and the first sub transmission line and the second sub transmission line are disconnected at an electrical connection point 331. The two ends of the first sub-transmission line are electrically connected to the first signal line 200 and the second transmission line 320, respectively, and one end of the second sub-transmission line, which is close to the electrical connection point 331, is spaced apart from the electrical connection point 331. The embodiment of the disclosure is not limited to the electrical connection point being located at one end of the first sub-transmission line, and the electrical connection point may also be located in the middle of the first sub-transmission line, as long as the first sub-transmission line is disconnected from the second sub-transmission line.

The second sub-transmission line which is positioned in the area where the electric connection point is far away from the second transmission line is arranged in an insulating way with the electric connection point, so that the signal on the driving chip can be prevented from being transmitted to the second sub-transmission line, and the voltage loss of the signal on the second sub-transmission line is avoided. In addition, the second sub-transmission line on one side of the first sub-transmission line far away from the second transmission line is reserved, so that the step difference in the display area can be avoided, and the uniformity of the thickness of the structure in the display area of the display substrate is ensured. In an actual process, the fabrication of the first transmission line including the disconnected first sub-transmission line and the second sub-transmission line may be achieved by mask drawing.

For example, a second sub-transmission line insulated from the electrical connection point may be connected to the electrostatic discharge member to prevent excessive static electricity on the display substrate from affecting subsequent display. The electrostatic discharge part may be located at a side of the display area along the second direction where the second transmission line is not disposed.

For example, the display substrate as shown in fig. 1A may be applied to a small-sized display device. For example, the diagonal dimension of the display device may be less than 15 inches.

For example, fig. 2A is a schematic diagram of a partial structure of a display substrate including the transmission line shown in fig. 1A. As shown in fig. 2A, the display substrate further includes a plurality of second signal lines 400 extending in the second direction, one of the first signal lines 200 and the second signal lines 400 is a data line, and the other is a gate line. The embodiment of the present disclosure will be described taking the first signal line 200 as a data line and the second signal line 400 as a gate line as an example.

For example, the second signal line 400 is disposed in parallel with the first transmission line 310, and the positional relationship between the second signal line 400 and the first transmission line 310 may be determined according to the number relationship between them, and is not particularly limited.

For example, as shown in fig. 2A, the display substrate further includes a bonding region 500 located at the peripheral region 120, the bonding region 500 being configured to bond with at least one of the data driving chip 510 and the gate driving chip 520. For example, the binding area 500 may be located at one side of the display area 110 in the Y direction, or may be located at both sides of the display area 110 in the Y direction, which is not limited by the embodiment of the present disclosure. The data line is electrically connected to the data driving chip 510 through the terminal 301 of the second transmission line 320 remote from the electrical connection point 331, and the data driving chip 510 supplies a data signal to the data line. The gate line is electrically connected to the gate driving chip 520 through the third transmission line 410, and the gate driving chip 520 provides a gate signal to the gate line.

Fig. 2A schematically illustrates that the data driving chip 510 and the gate driving chip 520 are located at one side of the display area 110 in the Y direction, i.e., at the same bonding area 500, but not limited thereto, the data driving chip 510 and the gate driving chip 520 may be located at both sides of the display area 110 in the Y direction, i.e., at both bonding areas 500, respectively. In the embodiment of the disclosure, the first transmission line 310 for transmitting the data signal for the data line is disposed in the display area 110, and the binding area 500 bound with the data driving chip 510 is disposed at one side of the display area 110 along the Y direction, so that the space on two sides of the display area 110 along the X direction can be further saved, and the purpose of a narrow frame can be achieved.

Fig. 2B and 2C are schematic partial structures of a display substrate according to another example of the embodiment of the disclosure. The structural shape of the first transmission line 310, the electrical connection relationship between the first transmission line 310 and the first signal line 200, the electrical connection relationship between the first transmission line 310 and the second transmission line 320, the transmission resistance relationship between any two transmission lines 300, the number relationship between the second transmission line 320 and the first signal line 200, and the relationship between the length of the second transmission line 320 electrically connected to the first signal line 200 and the distance between the first signal line 200 and the region where the second transmission line 320 is located in this example are the same as those of the example shown in fig. 2A, and will not be repeated here.

For example, as shown in fig. 2B, adjacent first signal lines 200 are electrically connected to adjacent second transmission lines 320, respectively. For example, when the number of the first signal lines 200 is the same as the number of the first transmission lines 310, the adjacent first signal lines 200 are electrically connected to the adjacent first transmission lines 310, respectively. Fig. 2B exemplarily shows that, in the direction indicated by the arrow in the X direction, the distance between the electrical connection point 331 and the area where the second transmission line 320 is located gradually decreases, and thus the resistance of the first transmission line 310 arranged in the X direction affecting the transmission signal gradually decreases. In order to ensure that the transmission resistances of any two transmission lines are approximately equal, the length of the second transmission line 320 aligned in the X direction needs to be gradually increased.

For example, in one example, the position of the first driving chip 510 for providing the driving signal to the first signal line 200 may be determined according to the minimum distance of the electrical connection point 331 from the area where the second transmission line 320 is located. For example, in the example shown in fig. 2B, the first driving chip 510 (e.g., a data driving chip) may be disposed at a position distant from the electrical connection point 331 closest to the region where the second transmission line 320 is located, that is, the first driving chip 510 is located on the left side (opposite to the arrow of the X direction) of the center line of the peripheral region 120 in the Y direction. The wiring manner of the second transmission line 320 shown in fig. 2B is a direct wiring manner, and the length of the second transmission line 320 is designed to match the distance between the electrical connection point 331 on the first transmission line 310 and the area 302 where the second transmission line 320 is located, so as to match the resistance that affects the signal with the first transmission line 310, thereby ensuring that the transmission resistances on different transmission lines are approximately equal, ensuring that the transmission resistance on each transmission line is smaller, and improving the display uniformity of the display device while reducing the power consumption.

For example, the second driving chip 520 (e.g., gate driving chip) electrically connected to the second signal line 400 may be located at the same side of the display area 110 as the first driving chip 510 to save a frame of the display device.

The present example does not limit the position of the first driving chip 510 and the wiring manner of the second transmission line 320 shown in fig. 2B. For example, as shown in fig. 2C, the first driving chip 510 electrically connected to the second transmission line 320 may be located at any position along the X direction of the peripheral region 120, and the transmission resistances on any two transmission lines 300 may be ensured to be approximately equal by adding a small-sized loop line to at least one second transmission line 320.

Fig. 3A is a schematic diagram of a partial structure of a display substrate including the transmission line and the distribution of electrical connection points shown in fig. 1A. As shown in fig. 3A, the display substrate further includes a plurality of pixels 610 located in the display area 110, and the plurality of pixels 610 are arranged in an array along a first direction and a second direction. The pixels 610 arranged in the second direction correspond to the plurality of first signal lines 200 one by one, and the number of the first transmission lines 310 corresponding to any two pixels 610 arranged in the first direction is the same. The square in the area surrounded by the adjacent first signal line 200 and the adjacent second signal line 400 in fig. 3A represents a pixel electrode of the pixel 610, which is, for example, a transparent electrode, and a material such as indium tin oxide may be used. The number of the first transmission lines 310 disposed between any two pixel electrodes arranged in the first direction is the same, and one second signal line 400 is disposed between any two pixel electrodes arranged in the first direction. In the embodiment of the disclosure, the number of the wirings arranged between any two pixel electrodes arranged along the first direction is the same, so that the same distance between the pixel electrodes is ensured, and uniformity of a display picture is facilitated.

For example, when the display substrate provided in this example is used in a liquid crystal display device, the first transmission line is located between adjacent pixel electrodes. When the display substrate is used in an organic light emitting diode display device or electronic paper, the first transmission lines may be located between adjacent pixel electrodes or may be uniformly distributed on the pixel electrodes, which is not limited in the embodiments of the present disclosure.

For example, as shown in fig. 3A, each pixel 610 includes a thin film transistor 611, a gate electrode of the thin film transistor 611 is connected to a gate line (e.g., the second signal line 400), one of a source and a drain electrode of the thin film transistor 611 is connected to a data line (e.g., the first signal line 200), and the other of the source and the drain electrode of the thin film transistor 611 is connected to a pixel electrode. Fig. 3A schematically illustrates only the thin film transistor 611 included in one pixel 610, and the connection relationship between the thin film transistor 611 and the first signal line 200, the second signal line 400, and the pixel electrode, and the connection relationship between the thin film transistor 611 and the signal lines included in other pixels are the same as the thin film transistor 611 illustrated in fig. 3A.

For example, when the display substrate is a display substrate of a liquid crystal display device, each pixel further includes a common electrode; when the display substrate is of an organic light-emitting diode display device, the pixel electrode is an anode of a pixel, and each pixel further comprises a cathode and a light-emitting layer positioned between the cathode and the anode; when the display substrate is an electronic paper display substrate, the pixel electrode is a first electrode of a pixel, and each pixel further comprises a second electrode and an electrophoretic display layer positioned between the first electrode and the second electrode.

For example, as shown in fig. 3A, the first transmission line 310 and the second signal line 400 corresponding to one pixel 610 are uniformly distributed along the first direction. For example, the first transmission lines 310 and the second signal lines 400 between adjacent pixel electrodes are uniformly distributed.

For example, as shown in fig. 3A, the number of pixels 610 arranged in the second direction is M, and the number of pixels 610 arranged in the first direction is N. When the value of M/N is a positive integer M, the row of pixels 610 arranged along the second direction corresponds to M first transmission lines 310; when the value of M/N is a non-integer and the integer part is M, the row of pixels 610 arranged along the second direction corresponds to (m+1) the first transmission lines 310, and M and N are both positive integers.

For example, when M is 8 and N is 4, the value of M/N is 2, and one row of pixels 610 arranged along the second direction corresponds to 2 first transmission lines 310, and four rows of pixels 610 arranged along the first direction corresponds to 8 first transmission lines 310. When the value of M/N is a positive integer, the number of first transmission lines 310 is the same as the number of first signal lines 200.

For example, when the value of M/N is a non-integer, the first transmission line 310 includes the dummy line 313 and the signal transmission line 312 connected to the second transmission line 320, the number of the signal transmission lines 312 and the number of the first signal lines 200 are both M, and the number of the dummy lines 313 is n×1-M. Fig. 3A schematically illustrates that the number of pixels 610 arranged along the second direction is 10, the number of pixels 610 arranged along the first direction is 4, the value of M/N is a non-integer, and the integer part is 2, then a row of pixels 610 arranged along the second direction corresponds to 3 first transmission lines 310, and the array of pixels 610 corresponds to 12 first transmission lines 310. The number of the first signal lines 200 in this example is 10, the number of the first transmission lines 310 is 2 more than the number of the first signal lines 200, and the 2 first transmission lines 310 are dummy lines 313 that do not function to transmit signals.

For example, the dummy line 313 may be located at a side of the signal transmission line 312 farthest from the center line of the display area 110 extending in the second direction, which is away from the center line. Fig. 3A schematically shows that 2 dummy lines 313 are located on both sides of 10 signal transmission lines 312 in the first direction, respectively, i.e., all the signal transmission lines 312 are located between 2 dummy lines 313. Therefore, when the driving chip is arranged in the middle of the peripheral area along the first direction, the uniform distribution of the signal transmission lines can be ensured, and the display difference of the half screens at the two sides of the center line of the display device, which extends along the second direction, is reduced. The embodiments of the present disclosure are not limited thereto, and the dummy line may be disposed between any adjacent two signal transmission lines.

It should be noted that, the present example is not limited to the distribution of the electrical connection points shown in fig. 1A, and the electrical connection points may also be the distribution shown in fig. 2B, where the dummy lines 313 may be located on one side of the signal transmission lines 312 along the first direction, or may be located on two sides of all the signal transmission lines 312 along the first direction, respectively, so as to facilitate the wiring of the second transmission lines 320. Of course, the present example is not limited thereto, and the dummy line 313 may be disposed between any adjacent signal transmission lines 312.

For example, the dummy line may be connected to the static electricity discharge member to discharge static electricity on the display substrate, thereby preventing the static electricity from affecting subsequent display.

For example, fig. 3B is a schematic layout diagram of the first transmission line after the plurality of pixels shown in fig. 3A are divided into a plurality of pixel groups. As shown in fig. 3B, when the value of M/N is a non-integer, N columns of pixels 610 arranged along the first direction are divided into N columns of pixel groups 600, the value of M/N is a positive integer s, each column of pixel groups 600 corresponds to s first transmission lines 310, the number of the first transmission lines 310 and the number of the first signal lines 200 are both M, and N is a positive integer smaller than N. When the value of M/N is a non-integer, the pixels 610 are divided into the pixel groups 600 and then the first transmission lines 310 are routed, so that the number of the dummy lines 313 can be reduced to increase the gaps between the adjacent pixel electrodes while ensuring that the adjacent pixel groups 600 correspond to the same number of the first transmission lines 310 to ensure the display uniformity, thereby increasing the aperture ratio of the pixels 610 and improving the display effect of the display device.

For example, when the first transmission line may overlap with the pixel electrode of a pixel, the first transmission line corresponding to one pixel group may be uniformly disposed on the pixel electrode.

For example, as shown in fig. 3B, the number of pixels 610 arranged in the second direction is 10, the number of pixels 610 arranged in the first direction is 4, and dividing 4 columns of pixels 610 arranged in the first direction into 2 columns of pixel groups 600, the value of M/n is 5, each column of pixel groups 600 corresponds to 5 first transmission lines 310, two columns of pixel groups 600 corresponds to 10 first transmission lines 310, and the number of first transmission lines 310 and the number of first signal lines 200 at this time are both 10. Since each pixel group 600 includes 2 pixels 610, each pixel group 600 also corresponds to 2 second signal lines 400, and thus, each column of pixel groups 600 corresponds to 7 wirings.

In the example shown in fig. 3B, it is schematically shown that 3 first transmission lines 310 are disposed between two pixels 610 in each pixel group 600, and 2 first transmission lines 310 are disposed between adjacent pixel groups 600 arranged along the first direction.

For example, while 3 first transmission lines 310 are disposed between two pixels 610 and 2 first transmission lines 310 are disposed between adjacent pixel groups 600, one of 2 second signal lines 400 may be disposed between two pixels 610 of each pixel group 600, or 2 second signal lines 400 may be disposed between adjacent pixel groups 600, and only 3 first transmission lines 310 are disposed between two pixels 610 of each pixel group 600, which is not limited in the embodiment of the present disclosure.

By adopting the arrangement manner of the first transmission lines 310 in the example shown in fig. 3B, on the one hand, the number of the first transmission lines 310 arranged between any adjacent pixel groups 600 is the same, and the number of the first transmission lines 310 is the same as the number of the first signal lines 200, so that not only can the display uniformity be ensured, but also the gaps between adjacent pixel electrodes can be saved, and the aperture ratio of the pixels can be increased.

Fig. 4 is a schematic partial structure of a display substrate according to another embodiment of the disclosure. As shown in fig. 4, the display area 110 includes two sub-display areas independent of each other along the first direction, and the distribution of the pixels 610 in the two sub-display areas, the distribution of the first signal lines 200, the distribution of the second signal lines 400, the distribution of the first transmission lines 310, and the distribution of the electrical connection points 331 are all substantially symmetrically distributed along the center line 101 extending along the second direction of the display area 110. The two sub-display regions independent of each other refer to the first signal lines 200 respectively located in the two sub-display regions, which are insulated from each other.

For example, fig. 4 schematically illustrates that two different first driving chips 510 may be used to provide driving signals for the first signal lines 200 in the two sub-display areas, respectively. The embodiment of the present disclosure is not limited thereto, and one first driving chip 510 may be used to respectively supply driving signals to the first signal lines 200 in the two sub-display areas.

For example, as shown in fig. 4, adjacent first signal lines 200 in each sub-display area are electrically connected to adjacent second transmission lines 320, respectively. For example, when the number of first signal lines 200 is the same as the number of first transmission lines 310, adjacent first signal lines 200 within each sub-display area are electrically connected to the adjacent first transmission lines 310, respectively; when the number of the first signal lines 200 is smaller than that of the first transmission lines 310, the first transmission lines 310 include signal transmission lines and dummy lines, and adjacent first signal lines 200 in each sub-display area are electrically connected to the adjacent signal transmission lines, respectively. The dummy lines may be disposed on both sides of the signal transmission line in the first direction, i.e., on a side of the signal transmission line farthest from a center line of the display area extending in the second direction, which is away from the center line, to improve uniformity of the display screen.

For example, as shown in fig. 4, in each sub-display area, the distance between the electrical connection point 331 and the center line 101 decreases as the shortest distance between the electrical connection point 331 and the area where the second transmission line 320 is located decreases, i.e., the electrical connection points 331 in the two sub-display areas are distributed in a "V" shape. The present example is not limited thereto, and the distance between the electrical connection point 331 and the center line 101 in each sub-display area may also increase as the shortest distance between the electrical connection point 331 and the area where the second transmission line 320 is located decreases, i.e., the electrical connection points 331 in the two sub-display areas are distributed in an inverted "V" shape. The display substrate provided by the present example may be used for a large-sized display device, such as a display device having two independent display screens. For example, the display device may be a display having a diagonal dimension greater than 25-50 inches.

Fig. 4 schematically illustrates an example in which the distribution of the electrical connection points 331 in each sub-display area is the same as that of the electrical connection points 331 in the display area 110 illustrated in fig. 2B, but is not limited thereto. For example, the distance of the electrical connection point 331 located in any one of the sub-display areas from the center line 101 of the display area 110 along the second direction increases as the shortest distance of the electrical connection point 331 from the area where the second transmission line 320 is located decreases. For example, the distribution of the electrical connection points 331 in each sub-display area may also be the same as the distribution of the electrical connection points 331 in the display area 110 shown in fig. 2A.

Fig. 5A is a schematic cross-sectional view of the electrical connection point shown in fig. 1A, and fig. 5B is a schematic cross-sectional view of the virtual connection point shown in fig. 1A. As shown in fig. 5A, the first signal line 200 and the first transmission line 310 are located in different layers, the first conductive layer where the first signal line 200 is located on one side of the second conductive layer where the first transmission line 310 is located, which is close to the substrate 100, an insulating layer 710 is included between the first conductive layer and the second conductive layer, the insulating layer 710 includes a via 711, and the first transmission line 310 is electrically connected to the corresponding first signal line 200 through the via 711 to form an electrical connection point 331.

For example, as shown in fig. 5B, a spacer layer 720 may be further included between the first signal line 200 and the first transmission line 310 at the virtual connection point 332, so as to reduce the overlap capacitance of the first signal line 200 and the first transmission line 310 at the overlapping position.

For example, as shown in fig. 5A and 5B, the thickness of the spacer layer 720 is the same as that of the insulating layer 710 to ensure optical uniformity when the display substrate is used for display.

For example, another embodiment of the present disclosure provides a display device including a display substrate shown in any one of the examples of the above embodiments. In the display device adopting the display substrate, the first transmission line for transmitting signals for the first signal line is arranged in the display area, so that the space of the peripheral area can be saved, and the design of a narrow frame can be realized; and, through setting the transmission resistance of arbitrary two transmission lines to be approximately equal, can also guarantee the homogeneity of display frame in order to guarantee the quality of display frame, and then provide good viewing experience for the user.

For example, the display device may be a display device such as a liquid crystal display device or an organic light emitting diode display device, and any product or component having a display function including a television, a digital camera, a mobile phone, a wristwatch, a tablet computer, a notebook computer, a navigator, and the like, and the embodiment is not limited thereto.

For example, the display device may also be an electronic paper. Electronic paper is a film-like material made of thousands of tiny capsule-like particles coated on a plastic substrate. The electronic paper comprises two electrode layers and an electrophoresis display layer positioned between the two electrode layers, the electrophoresis display layer comprises a plurality of display microcells, and each display microcell comprises an electrophoresis liquid and electrophoresis particles suspended in the electrophoresis liquid. The voltage signal on one electrode layer can control the electrophoresis particles in the microcapsule in the electrophoresis display layer to generate electrophoresis, so as to display specific patterns or characters.

The following points need to be described:

(1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design.

(2) Features of the same and different embodiments of the disclosure may be combined with each other without conflict.

The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the disclosure, which is defined by the appended claims.

Claims

1. A display substrate, comprising:

a substrate including a display region and a peripheral region surrounding the display region;

a plurality of first signal lines located in the display area and extending along a first direction; and

a plurality of transmission lines, each transmission line including a first transmission line located in the display area, the first transmission line extending in a second direction, the first transmission line intersecting the first signal line, each first signal line being electrically connected to a corresponding one of the first transmission lines, an electrical connection point between the first signal line and the corresponding one of the transmission lines being located at an intersection point between the first signal line and the corresponding one of the transmission lines,

a binding area located in a peripheral area of one side of the display area along the second direction;

Wherein the number of the first transmission lines is not less than the number of the first signal lines,

the transmission line electrically connected to the first signal line through the first transmission line further includes a second transmission line located in the peripheral region and electrically connected to the first transmission line, the second transmission line being located in the bonding region,

the length of the second transmission line electrically connected with the first signal line decreases as the shortest distance between the first signal line and the bonding region increases;

the first transmission line electrically connected with the first signal line comprises a first sub transmission line and a second sub transmission line which are spaced from each other, the first sub transmission line and the second sub transmission line are disconnected at the electric connection point, two ends of the first sub transmission line are respectively electrically connected with the first signal line and the second transmission line, one end, close to the electric connection point, of the second sub transmission line is arranged at intervals with the electric connection point, and the second sub transmission line is connected with the static electricity releasing component.

2. The display substrate of claim 1, further comprising:

a plurality of second signal lines extending in the second direction;

one of the first signal line and the second signal line is a data line, the other is a grid line, and the first signal line is electrically connected with the driving chip through an endpoint of the second transmission line, which is far away from the first transmission line and is electrically connected with the second transmission line.

3. The display substrate according to claim 1, wherein the electrical connection points are distributed on at least one side of a center line of the display area extending in the second direction, and the first signal lines electrically connected to the electrical connection points located on either side of the center line are uniformly distributed in the second direction.

4. The display substrate according to claim 1, wherein the electrical connection points are distributed on at least one side of a center line of the display area extending in the second direction, and a distance of the electrical connection points located on either side of the center line from the center line increases as a shortest distance of the electrical connection points from the bonding area decreases.

5. A display substrate according to claim 3, wherein the electrical connection point of the first signal lines of odd-numbered rows is located at one side of the center line, the electrical connection point of the first signal lines of even-numbered rows is located at the other side of the center line, and the first signal lines of adjacent odd-numbered rows are electrically connected to the adjacent second transmission lines, respectively, and the first signal lines of adjacent even-numbered rows are electrically connected to the adjacent second transmission lines, respectively.

6. The display substrate according to any one of claims 1 to 5, wherein the number of the second transmission lines is the same as the number of the first signal lines, and the first signal lines are electrically connected to the second transmission lines through the first transmission lines in one-to-one correspondence.

7. The display substrate according to claim 1, wherein adjacent first signal lines are electrically connected to adjacent second transmission lines, respectively.

8. The display substrate according to claim 1 or 2, wherein the display region includes two sub-display regions independent of each other in the first direction, and the adjacent first signal lines within each of the sub-display regions are electrically connected to the adjacent second transmission lines, respectively;

the electrical connection points in the two sub-display areas are symmetrically distributed relative to a central line of the display area extending along the second direction; or alternatively, the process may be performed,

in the sub display area, the distance between the electric connection point and the center line of the sub display area along the second direction increases along with the decrease of the shortest distance between the electric connection point and the area where the second transmission line is located.

9. The display substrate of claim 2, further comprising:

a plurality of pixels located in the display area and arranged in an array along the first direction and the second direction, each pixel including a thin film transistor, a control electrode of the thin film transistor being connected to the gate line, one of source and drain electrodes of the thin film transistor being connected to the data line,

The pixels arranged along the second direction are in one-to-one correspondence with the plurality of first signal lines, the number of the first transmission lines corresponding to any two pixels arranged along the first direction is the same, and the pixels and at least one first transmission line are arranged between two adjacent second signal lines.

10. The display substrate according to claim 9, wherein the number of pixels arranged in the second direction is M and the number of pixels arranged in the first direction is N;

when the value of M/N is a positive integer M, a row of pixels arranged along the second direction corresponds to M first transmission lines; when the value of M/N is a non-integer and the integer part is M, a row of pixels arranged along the second direction corresponds to (m+1) the first transmission lines, and M and N are both positive integers.

11. The display substrate according to claim 10, wherein when the value of M/N is a non-integer, the first transmission line includes a dummy line and a signal transmission line electrically connected to the second transmission line, the number of signal transmission lines and the number of first signal lines are both M, and the number of dummy lines is N (m+1) -M.

12. The display substrate according to claim 11, wherein the dummy line is located on a side of the signal transmission line farthest from a center line of the display area extending in the second direction, the side being away from the center line.

13. The display substrate according to claim 10, wherein when the value of M/N is a non-integer, N columns of pixels arranged along the first direction are divided into N columns of pixel groups, the value of M/N is a positive integer s, each column of pixel groups corresponds to s of the first transmission lines, the number of the first transmission lines and the number of the first signal lines are both M, and N is a positive integer smaller than N.

14. The display substrate of claim 1, wherein the length of each of the first transmission lines is the same.

15. The display substrate of claim 14, wherein a portion of the first transmission line remote from the electrical connection point from the second transmission line is insulated from the electrical connection point.

16. The display substrate according to claim 1, wherein the crossing point at which the first transmission line crosses at least two first signal lines includes the electrical connection point and a virtual connection point without electrical connection,

the first conductive layer where the first signal line is located on one side, close to the substrate, of the second conductive layer where the first transmission line is located, an insulating layer is arranged between the first conductive layer and the second conductive layer, the insulating layer comprises a via hole, the first transmission line is electrically connected with the corresponding first signal line through the via hole to form an electrical connection point, a spacing layer is further arranged between the first conductive layer and the second conductive layer at the virtual connection point, and the thickness of the spacing layer is the same as that of the insulating layer.

17. A display device comprising the display substrate of any one of claims 1-16.