CN111948859A

CN111948859A - Display substrate and display device

Info

Publication number: CN111948859A
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: 2020-11-17
Anticipated expiration: 2039-05-17
Also published as: CN116719188A; CN116736587A; CN111948859B

Abstract

A display substrate and a display device are provided. The display substrate includes: the circuit board comprises a substrate base plate, 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 lines extend along the second direction, and each first signal line is electrically connected with one 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 electrically connected with the first transmission line, the resistance from the electric connection point of the first signal line and 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 resistance of each transmission line is equal. The display substrate in the embodiment of the disclosure can save the space of the peripheral area to realize the design of the narrow frame, and can also ensure the uniformity of the display picture.

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

At present, ultra-thin and ultra-narrow frame and even frameless display devices are more and more widely concerned, so that many manufacturers develop towards the direction of manufacturing ultra-narrow frame and even frameless 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: the substrate comprises a display area and a peripheral area surrounding the display area; a plurality of first signal lines located in the display region and extending in a first direction; and each transmission line comprises a first transmission line positioned in the display area, the first transmission lines extend along a second direction, the first transmission lines and the first signal lines are arranged in a crossed manner, each first signal line is electrically connected with a corresponding first transmission line, and the electric connection points of the first signal lines and the corresponding first transmission lines are arranged at the intersection points of the first signal lines and the corresponding transmission lines. The number of the first transmission lines is not less than that 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 located in the peripheral area and electrically connected with the first transmission lines, the resistance from the electric connection point of the first signal lines and the first transmission lines to the end point 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 resistance of the transmission lines is equal.

For example, the display substrate further includes: a plurality of second signal lines extending in the second direction; and a bonding region located in a peripheral region of one side of the display region along the second direction, the second transmission line being located in the bonding region. One of the first signal line and the second signal line is a data line, the other one is a grid line, and the first signal line is electrically connected with a driving chip through the end point of the second transmission line far away from the first transmission line 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 of the first signal line from 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 of the electrical connection points located on either side of the center line increase as a shortest distance from the binding area decreases.

For example, the electrical connection points of the first signal lines in odd-numbered rows are located at one side of the center line, the electrical connection points of the first signal lines in even-numbered rows are located at the other side of the center line, and the first signal lines in adjacent odd-numbered rows are electrically connected to adjacent second transmission lines, respectively, and the first signal lines in adjacent even-numbered rows are electrically connected to 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 with the second transmission lines in a one-to-one correspondence manner through the first transmission lines.

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

For example, the display area includes two sub-display areas independent of each other along the first direction, and the adjacent first signal lines in each sub-display area are electrically connected to the adjacent second transmission lines respectively; the electric 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 from the electrical connection point to the center line of the sub display area along the second direction increases with the decrease of the shortest distance from the electrical connection point to the area where the second transmission line is located.

For example, the display substrate further includes: and the plurality of pixels are positioned in the display area and are arranged in an array along the first direction and the second direction, each pixel comprises a thin film transistor, a control electrode of the thin film transistor is connected with the grid line, and one of a source electrode and a drain electrode of the thin film transistor is connected with the data line. The pixels arranged along the second direction correspond to the first signal lines one by one, 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; and 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) first transmission lines, and M and N are positive integers.

For example, when the value of M/N is a non-integer, the first transmission line includes dummy lines and signal transmission lines electrically connected to the second transmission line, the number of the signal transmission lines and the number of the first signal lines are both M, and the number of the dummy lines is N × M (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 group 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 the 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 spacing layer is further included between the first conductive layer and the second conductive layer of the virtual connection point, and the thickness of the spacing layer is the same as that of the insulating layer.

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

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1A is a schematic partial structure diagram of a display substrate according to an example of the disclosure;

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

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 the embodiment of the disclosure;

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

fig. 2B and fig. 2C are schematic partial structural diagrams of a display substrate according to another example 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 wiring diagram of the first transmission lines after the plurality of pixels shown in fig. 3A are divided into a plurality of pixel groups;

fig. 4 is a schematic partial structure diagram 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 junction shown in fig. 1A.

Detailed Description

In order to make 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 described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

In the research, the inventors of the present application found that: in the substrate structure of the display device, the fan-shaped (fanout) wiring connected to the signal lines 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 wide frame, so that the display area is relatively small, and the user experience is poor. Thus, a narrow bezel design includes: the sector wiring connected with the data lines is led out from the display area (AA area) to reduce the frames positioned at 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 sector-shaped wirings and the data lines in the display area is relatively long, which tends to cause a large difference in total resistance between the adjacent sector-shaped wirings, thereby causing display nonuniformity on the display panel, which affects the quality of the display screen, and may cause a user to visually generate a flickering feeling.

The embodiment of the disclosure provides a display substrate and a display device. The display substrate includes a substrate base, a plurality of first signal lines and a plurality of transmission lines on the substrate base. 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 lines extend along the second direction, the first transmission lines and the first signal lines are arranged in a crossed mode, each first signal line is electrically connected with a corresponding first transmission line, and the electrical connection point of the first transmission line and the corresponding first transmission line is located at the intersection point of the first signal line and the corresponding transmission line. The number of the first transmission lines is not less than that 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 located in the peripheral area and electrically connected with the first transmission lines, the resistance from the electric connection point of the first signal lines and the first transmission lines to the end point 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 resistance of the transmission lines is equal. In the display substrate provided by the embodiment of the disclosure, the first transmission line for transmitting the signal to the first signal line is disposed in the display area, so that the space in the peripheral area can be saved to realize the design of the narrow frame; moreover, the transmission resistances of any two transmission lines are set to be equal, so that the uniformity of a display picture can be ensured, the quality of the display picture is ensured, and good watching experience is provided for a user.

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

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

As shown in fig. 1A, each first signal line 200 is electrically connected to a corresponding first transmission line 310, i.e., different first signal lines 200 are electrically connected to different first transmission lines 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 can be electrically connected to the first signal line 200 through a via hole formed in an insulating layer located therebetween, that is, the insulating layer where the electrical connection point 331 is located is provided with a via hole. For example, the first transmission line 310 is in contact with the first signal line 200 at a via location to achieve electrical connection.

For example, a first signal line 200 may intersect a plurality of first transmission lines 310 to form a plurality of intersections 330, but only one intersection 330 of the plurality of intersections 330 is an electrical connection point 331 of the first signal line 200 and the first transmission line 310, and all other intersections 330 are dummy connection points 332 without electrical connection. That is, the virtual connection point 332 is located at a position where the first signal line 200 and the first transmission line 310 are insulated from each other, 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 in 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, which are not electrically connected to the first signal lines 200, include only the first transmission lines 310, not the second transmission lines 320; the number of transmission lines 300 is the same as the number of first signal lines 200, and each transmission line 300 includes a first transmission line 310 and a second transmission line 320.

As shown in fig. 1A, the end 301 of the second transmission line 320 far from the first transmission line 310 is connected to the first driver chip 510, and the signal provided by the first driver 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 for 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 affecting the signal transmission process, that is, the resistance from the electrical connection point 331 where the first signal line 200 is electrically connected to the first transmission line 310 to the end point 301 of the second transmission line 320 far away 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. The equality here includes strict equality and approximately equality, and approximately equality means that the ratio of the difference in transmission resistance of any two transmission lines to any transmission resistance is not more than 10%.

In the display substrate provided by the embodiment of the disclosure, the first transmission line for transmitting the signal to the first signal line is disposed in the display area, so that the space in the peripheral area can be saved to realize the design of the narrow frame. Moreover, the transmission resistances of any two transmission lines are set to be equal, so that the uniformity of a display picture can be ensured, the quality of the display picture is ensured, and good watching experience is provided for a user.

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

For example, the first transmission line 310 and the second transmission line 320 are electrically connected, which means that they 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 also be electrically connected to each other, which means that the two transmission lines are 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 a whole line, 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 embodiment of the present disclosure is not limited thereto, and the first transmission line and the second transmission line may also be two independent and electrically connected wires as long as the function of transmitting signals to the first signal line is achieved.

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 through the first transmission lines 310 in a one-to-one correspondence.

For example, as shown in fig. 1A, in the Y direction, the minimum distance of the electrical connection point 331 of the first signal line 200 from the region 302 where the second transmission line 320 is located increases with the increase of the minimum distance of the first signal line 200 from the region 302 where the second transmission line 320 is located. Here, the minimum distance from the electrical connection point (or the first signal line) to the region where the second transmission line is located refers to a distance from the electrical connection point (or the first signal line) to a boundary of the region where the second transmission line is located, the boundary being close to a side of the display region, and the boundary may be a boundary between the display region and the peripheral region. For example, a second transmission line is located at a bonding region, and a length of the second transmission line electrically connected to the first signal line decreases as a shortest distance between the first signal line and the bonding region increases. The bonding region here includes the region 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 region 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 from the first signal line 200 to the region 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, so that the first transmission line 310 electrically connected to the first signal line 200 has the smallest resistance to transmission signals, and the second transmission line 320 electrically connected to the first transmission line 310 has the longest length and the largest resistance. As the distance from the first signal line 200 to the region 302 where the second transmission line 320 is located increases, the resistance of the first transmission line 310 electrically connected to the first signal line 200, which affects the transmission signal, gradually increases, and the length of the second transmission line 320 electrically connected to the first signal line 200, which gradually decreases, the resistance gradually decreases. Thus, the total resistances of the first transmission line 310 and the second transmission line 320 electrically connected to the respective first signal lines 200, which affect the transmission signal, are substantially equal. That is, the transmission resistances of the transmission lines 300 electrically connected to the first signal lines 200 are substantially equal to each other.

For example, as shown in fig. 1A, the electrical connection points 331 are distributed on at least one side of the center line 101 of the display area 110 extending in the second direction, and the distances of the electrical connection points 331 located on either side of the center line 101 from the center line 101 increase as the shortest distance of the electrical connection points 331 from the area 302 where the second transmission line 320 is located decreases. That is, the electrical connection point 331 closer to the center line 101 is the greater the shortest distance from the area 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 the embodiment of the present disclosure. As shown in fig. 1A and 1B, the first driving chip (e.g., a chip on film) 510 is located in the middle of the peripheral region 120 along the X direction, and has a smaller size, so that the second transmission line 320 located in the middle of the peripheral region 120 has a shorter size and a smaller resistance, and the second transmission lines 320 located at two sides of the middle of the peripheral region 120 have a longer size and a larger resistance. The display device comprises a first transmission line, a second transmission line and a peripheral area, wherein the first transmission line is arranged on the peripheral area, the second transmission line is arranged on the peripheral area, the first transmission line is arranged at the position, far away from the area where the second transmission line is arranged, of the electric connection point of the first transmission line corresponding to the second transmission line arranged in the middle of the peripheral area, the influence of resistance difference between the second transmission lines arranged at different positions of the peripheral area on signals transmitted to the first signal line can be reduced, so that the difference between the transmission resistances of the transmission lines electrically connected with the first signal lines is extremely small, the uniformity of a display picture of the display device comprising the display.

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

The second transmission line 320 shown in fig. 1B is wired directly, and the length of the second transmission line 320 is designed to match the distance from the electrical connection point 331 on the first transmission line 310 to the area 302 where the second transmission line 320 is located, so as to match the resistance affecting 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 small, and improving the display uniformity of the display device while reducing the power consumption.

For example, in an actual process, in consideration of the purposes of saving cost and reducing power consumption, 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 of the display area 110 extending along the second direction, and the distances between the first signal lines 200 electrically connected to any two adjacent first transmission lines 310 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 the uniform distribution means that distances between adjacent first signal lines 200 electrically connected to the electrical connection points 331 are the same value.

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

Fig. 1A schematically shows a case where the first transmission lines correspond to the first signal lines one to one, but is not limited thereto. When the number of the first transmission lines is greater 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, the dummy lines not being electrically connected to any of the first signal lines. The first signal lines of adjacent odd (even) number rows are electrically connected to adjacent signal transmission lines, respectively, but the first signal lines of adjacent odd (even) number rows are not necessarily electrically connected to adjacent first transmission lines, and dummy lines may be provided between adjacent signal transmission lines.

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

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

When the equal difference of the resistances of the first transmission lines arranged along the X direction and positioned on the same side of the central line changes, the resistances of the second transmission lines electrically connected with the first transmission lines also change approximately with equal difference so as to realize that the transmission resistances of the transmission lines are approximately equal. In an actual process, when the resistance of the second transmission lines arranged along the extending direction of the first signal line gradually changes, if the distance from the electrical connection point on the first transmission line electrically connected with the second transmission line in the display area to the area where the second transmission line is located is not gradually changed, the display image is not uniform due to the large difference in resistance affecting the transmission signal on the adjacent transmission lines. The embodiment of the disclosure can design the distribution of the electric connection points on the first transmission line according to the change rule of the resistance on the second transmission line, thereby ensuring the uniformity of the display picture.

For example, as shown in fig. 1A, the lengths of the first transmission lines 310 are substantially the same. For example, the lengths of the first transmission lines 310 in the Y direction are the lengths of the display regions 110 in the Y direction, i.e., the number of intersections of the first transmission lines 310 and the first signal lines 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 by another example of the embodiment of the present disclosure. As shown in fig. 1C, a portion of the first transmission line 310 located at the region 302 where the electrical connection point 331 is far from the second transmission line 320 is insulated from the electrical connection point 331. That is, a portion of the first transmission line 310 distant 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. 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 close to the electrical connection point 331 has a certain distance from the electrical connection point 331. The embodiment of the present 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 and the electric connection point which are located in the area where the electric connection point is far away from the second transmission line are arranged in an insulating mode, so that signals on the driving chip can be prevented from being transmitted to the second sub-transmission line, and voltage loss of the signals on the second sub-transmission line is avoided. In addition, the second sub-transmission line which is far away from one side of the second transmission line and is reserved on the first sub-transmission line can avoid the section difference in the display area, and therefore the uniformity of the thickness of the structure in the display area of the display substrate is guaranteed. In an actual process, the first transmission line including the disconnected first sub-transmission line and the second sub-transmission line can be manufactured by drawing through a mask plate.

For example, the second sub-transmission line insulated from the electrical connection point may be connected to the static electricity discharge part to prevent the static electricity on the display substrate from being too large to affect the subsequent display. The electrostatic discharge part may be located at a side of the display area in 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 partial structural schematic diagram 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 along a 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 first signal line 200 is taken as a data line, and the second signal line 400 is taken as a gate line in the embodiment of the disclosure 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 the two, and is not particularly limited.

For example, as shown in fig. 2A, the display substrate further includes a bonding region 500 located in the peripheral region 120, the bonding region 500 being configured to be bonded to at least one of the data driving chip 510 and the gate driving chip 520. For example, the binding region 500 may be located on one side of the display region 110 along the Y direction, or may be located on both sides of the display region 110 along the Y direction, which is not limited by the embodiment of the disclosure. The data line is electrically connected to the data driving chip 510 through the end point 301 of the second transmission line 320 far from the electrical connection point 331, and the data driving chip 510 provides a data signal for 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 shows that the data driving chip 510 and the gate driving chip 520 are located at one side of the display region 110 along the Y direction, i.e., at the same bonding region 500, but the disclosure is not limited thereto, and the data driving chip 510 and the gate driving chip 520 may also be located at two sides of the display region 110 along the Y direction, i.e., at two bonding regions 500. The first transmission line 310 for transmitting data signals for the data lines is disposed in the display region 110, and the binding region 500 bound with the data driving chip 510 is disposed on one side of the display region 110 along the Y direction, so that the space on two sides of the display region 110 along the X direction can be further saved, and the purpose of narrow frame is achieved.

Fig. 2B and fig. 2C are schematic partial structural diagrams of a display substrate according to another example of the disclosure. In this example, 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 relationship between the transmission resistances of any two transmission lines 300, the relationship between the number of the second transmission lines 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 from the first signal line 200 to the area where the second transmission line 320 is located are the same as those in the example shown in fig. 2A, and are not described again here.

For example, as shown in fig. 2B, the adjacent first signal lines 200 are electrically connected to the adjacent second transmission lines 320, respectively. For example, when the number of the first signal lines 200 is the same as that 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 the distance from the electrical connection point 331 to the region where the second transmission line 320 is located is gradually reduced along the direction indicated by the arrow in the X direction, and the resistance of the first transmission line 310 arranged along the X direction, which affects the transmission signal, is gradually reduced. In order to ensure that the transmission resistances of any two transmission lines are substantially equal, the length of the second transmission line 320 arranged 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 away from the electrical connection point 331 closest to the area where the second transmission line 320 is located, i.e., the first driving chip 510 is located on the left side of the center line of the peripheral region 120 in the Y direction (the direction opposite to the arrow in the X direction). The second transmission line 320 shown in fig. 2B is wired directly, and the length of the second transmission line 320 is designed to match the distance from the electrical connection point 331 on the first transmission line 310 to the area 302 where the second transmission line 320 is located, so as to match the resistance affecting 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 small, and improving the display uniformity of the display device while reducing the power consumption.

For example, the second driving chip 520 (e.g., a gate driving chip) electrically connected to the second signal line 400 may be located at the same side of the display region 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 of the peripheral region 120 along the X direction, and the method of adding a small-sized meander line to at least one second transmission line 320 may ensure that the transmission resistances of any two transmission lines 300 are substantially equal.

Fig. 3A is a schematic partial structure diagram 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 region 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 to 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 fig. 3A in the area surrounded by the adjacent first signal line 200 and the adjacent second signal line 400 represents the pixel electrode of the pixel 610, which is a transparent electrode, and may be made of indium tin oxide or the like. 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 present disclosure, the number of the routing lines arranged between any two pixel electrodes arranged along the first direction is the same, so that the distance between the pixel electrodes is ensured to be the same, which is beneficial to the uniformity of the display image.

For example, when the display substrate provided in this example is used for a liquid crystal display device, the first transmission line is located between adjacent pixel electrodes. When the display substrate is used for 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.

For example, as shown in fig. 3A, each pixel 610 includes a thin film transistor 611, a control electrode of the thin film transistor 611 is connected to a gate line (e.g., the second signal line 400), one of source and drain electrodes 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 drain electrodes of the thin film transistor 611 is connected to a pixel electrode. Fig. 3A schematically shows a thin film transistor 611 included in one pixel 610 and a connection relationship between the thin film transistor 611 and the first signal line 200, the second signal line 400, and the pixel electrode, and thin film transistors included in other pixels and connection relationships between the thin film transistors and the signal lines 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 a display substrate of an organic light-emitting diode display device, the pixel electrode is an anode of each 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 a display substrate of electronic paper, the pixel electrode is a first electrode of the pixel, and each pixel further includes a second electrode and an electrophoretic display layer located between the first electrode and the second electrode.

For example, as shown in fig. 3A, the first transmission lines 310 and the second signal lines 400 corresponding to one pixel 610 are uniformly distributed in the first direction. For example, the first transmission lines 310 and the second signal lines 400 positioned between the 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, a row of pixels 610 arranged along the second direction corresponds to the M first transmission lines 310; when the value of M/N is a non-integer and the integer part is M, a row of pixels 610 arranged along the second direction corresponds to (M +1) first transmission lines 310, and M and N are positive integers.

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

For example, when the value of M/N is a non-integer, the first transmission line 310 includes dummy lines 313 and signal transmission lines 312 connected to the second transmission lines 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 × M (M +1) -M. Fig. 3A schematically shows that the number of pixels 610 arranged in the second direction is 10, the number of pixels 610 arranged in the first direction is 4, the value of M/N is a non-integer, and the integer part is 2, then one row of pixels 610 arranged in 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 a center line extending in the second direction of the display area 110, away from the center line. Fig. 3A schematically shows that 2 dummy lines 313 are respectively located on both sides of 10 signal transmission lines 312 in the first direction, 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 on two sides of the central line of the display device extending along the second direction is reduced. The embodiments of the present disclosure are not limited thereto, and the dummy line may also be disposed between any adjacent two signal transmission lines.

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

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

For example, fig. 3B is a wiring 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 group 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 wired, so that the adjacent pixel groups 600 can be ensured to correspond to the same number of first transmission lines 310 to ensure the display uniformity, and meanwhile, the number of the dummy lines 313 can be reduced to increase the gap between the adjacent pixel electrodes, 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 the pixel, the first transmission line corresponding to one pixel group may also be uniformly disposed on the pixel electrode.

For example, as shown in fig. 3B, the number of the pixels 610 arranged in the second direction is 10, the number of the pixels 610 arranged in the first direction is 4, and the 4 columns of the pixels 610 arranged in the first direction are divided into 2 columns of pixel groups 600, so that the value of M/n is 5, each column of the pixel groups 600 corresponds to 5 first transmission lines 310, and two columns of the pixel groups 600 correspond to 10 first transmission lines 310, where the number of the first transmission lines 310 and the number of the first signal lines 200 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 traces.

Fig. 3B schematically illustrates an example in which 3 first transmission lines 310 are provided between two pixels 610 in each pixel group 600, and 2 first transmission lines 310 are provided between adjacent pixel groups 600 arranged in 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 by the embodiment of the present disclosure.

With the arrangement of the first transmission lines 310 in the example shown in fig. 3B, on one hand, the number of the first transmission lines 310 disposed between any adjacent pixel groups 600 is the same, and the number of the first transmission lines 310 is the same as that of the first signal lines 200, which not only can ensure display uniformity, but also can save gaps between adjacent pixel electrodes and increase the aperture ratio of pixels.

Fig. 4 is a schematic partial structure diagram 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, 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 in the two sub-display areas are substantially symmetrically distributed with respect to a center line 101 extending along the second direction of the display area 110. The two sub-display regions independent from each other means that the first signal lines 200 respectively positioned in the two sub-display regions are insulated from each other.

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

For example, as shown in fig. 4, the adjacent first signal lines 200 in each sub-display region are electrically connected to the 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 in 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 less than that of the first transmission lines 310, the first transmission lines 310 include signal transmission lines and dummy lines, and the 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 at both sides of the signal transmission line in the first direction, that is, the dummy lines are disposed at 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 to improve uniformity of a display screen.

For example, as shown in fig. 4, in each sub-display region, the distance from the electrical connection point 331 to the center line 101 decreases as the shortest distance from the electrical connection point 331 to the region where the second transmission line 320 is located decreases, i.e., the electrical connection points 331 in the two sub-display regions are distributed in a "V" shape. The present example is not limited thereto, and within each sub display region, the distance of the electrical connection point 331 from the center line 101 may also increase as the shortest distance of the electrical connection point 331 from the region where the second transmission line 320 is located decreases, i.e., the electrical connection points 331 within the two sub display regions are distributed in an inverted "V" shape. The display substrate provided by the present example can be used for a large-sized display device, for example, 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 that the distribution of the electrical connection points 331 in each sub display region is the same as the distribution of the electrical connection points 331 in the display region 110 illustrated in fig. 2B, for example, but is not limited thereto. For example, the distance of the electrical connection point 331 located at any one sub-display region from the center line 101 of the display region 110 in the second direction increases as the shortest distance of the electrical connection point 331 from the region where the second transmission line 320 is located decreases. For example, the distribution of the electrical connection points 331 in each sub-display region may also be the same as the distribution of the electrical connection points 331 in the display region 110 shown in fig. 2A.

Fig. 5A is a schematic cross-sectional view at 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. As shown in fig. 5A, the first signal line 200 and the first transmission line 310 are located at different layers, the first conductive layer where the first signal line 200 is located on one side, close to the substrate 100, of the second conductive layer where the first transmission line 310 is located, an insulating layer 710 is included between the first conductive layer and the second conductive layer, the insulating layer 710 includes a via hole 711, and the first transmission line 310 is electrically connected to the corresponding first signal line 200 through the via hole 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 dummy 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 the display substrate shown in any 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 to realize the design of a narrow frame; moreover, the transmission resistances of any two transmission lines are set to be approximately equal, so that the uniformity of a display picture can be ensured, the quality of the display picture is ensured, and good watching experience is provided for a 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 such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator including the display device, but the embodiment is not limited thereto.

For example, the display device may also be electronic paper. Electronic paper is a film-like material made by coating thousands of tiny capsule-like particles on a plastic substrate. The electronic paper comprises two electrode layers and an electrophoresis display layer located between the two electrode layers, wherein the electrophoresis display layer comprises a plurality of display micro units, and each display micro unit comprises electrophoresis liquid and electrophoresis particles suspended in the electrophoresis liquid. The electrophoresis of the electrophoretic particles in the microcapsules in the electrophoretic display layer can be controlled by a voltage signal on one electrode layer, so that a specific pattern or character can be displayed.

The following points need to be explained:

(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 general designs.

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

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

Claims

1. A display substrate, comprising:

the substrate comprises a display area and a peripheral area surrounding the display area;

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

a plurality of transmission lines, each of the transmission lines including a first transmission line located in the display region, the first transmission lines extending in a second direction, the first transmission lines being disposed to cross the first signal lines, and each of the first signal lines being electrically connected to a corresponding one of the first transmission lines at a point where the first signal line crosses a corresponding one of the transmission lines,

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 positioned at the peripheral region and electrically connected to the first transmission line,

and the resistance from the electric connection point of the first signal line and 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 lines, and the transmission resistances of the transmission lines are equal.

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

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

a bonding region located in a peripheral region of one side of the display region along the second direction, the second transmission line being located in the bonding region;

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

3. The display substrate of claim 2, wherein a length of the second transmission line electrically connected to the first signal line decreases as a shortest distance of the first signal line from the bonding region increases.

4. The display substrate according to claim 3, 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.

5. The display substrate of claim 3, 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 distances of the electrical connection points located on either side of the center line from the center line increase as a shortest distance of the electrical connection points from the bonding area decreases.

6. The display substrate according to claim 4, wherein the electrical connection points of the first signal lines of odd-numbered rows are located at one side of the center line, the electrical connection points of the first signal lines of even-numbered rows are located at the other side of the center line, and the first signal lines of adjacent odd-numbered rows are electrically connected to adjacent second transmission lines, respectively, and the first signal lines of adjacent even-numbered rows are electrically connected to adjacent second transmission lines, respectively.

7. The display substrate according to any one of claims 1 to 6, 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 in a one-to-one correspondence via the first transmission lines.

8. The display substrate of claim 3, wherein adjacent ones of the first signal lines are electrically connected to adjacent ones of the second transmission lines, respectively.

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

the electric 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; alternatively, the first and second electrodes may be,

in the sub display area, the distance from the electrical connection point to the center line of the sub display area along the second direction increases as the shortest distance from the electrical connection point to the area where the second transmission line is located decreases.

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

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

the pixels arranged along the second direction correspond to the first signal lines one by one, and the number of the first transmission lines corresponding to any two pixels arranged along the first direction is the same.

11. The display substrate according to claim 10, 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; and 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) first transmission lines, and M and N are positive integers.

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

13. The display substrate according to claim 12, 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.

14. The display substrate according to claim 11, wherein when M/N is a non-integer, N columns of pixels arranged in the first direction are divided into N columns of pixel groups, 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.

15. The display substrate of claim 1, wherein the lengths of the first transmission lines are the same.

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

17. The display substrate of claim 1, wherein the intersections where the first transmission lines intersect at least two first signal lines include the electrical connection points and dummy connection points without electrical connection,

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

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