Light-emitting substrate and display device

Abstract

A light-emitting substrate and a display device. The light-emitting substrate comprises a light-emitting region (10) and a binding region (20) located on one side of the light-emitting region (10), wherein the light-emitting region (10) comprises sub-light-emitting regions (11) extending in a first direction, and each sub-light-emitting region (11) comprises a plurality of sub-regions (12) arranged in the first direction. The light-emitting substrate comprises: a substrate; a plurality of light-emitting units (30) located on one side of the substrate, wherein the light-emitting units (30) located in the sub-light-emitting regions (11) are arranged into a plurality of groups in the first direction, each light-emitting unit group comprises a plurality of light-emitting units (30) arranged in a second direction, the second direction intersects with the first direction, and each sub-region (12) is provided with at least one light-emitting unit group; and a plurality of driving voltage signal lines (40) located between the substrate and the light-emitting units (30), wherein each driving voltage signal line (40) comprises a first sub-driving voltage signal line (41) extending in the first direction and at least one second sub-driving voltage signal line (42) extending in the second direction and electrically connected to the first sub-driving voltage signal line (41), one end of the first sub-driving voltage signal line (41) is connected to the binding region (20) and the other end thereof extends to the light-emitting region (10), each second sub-driving voltage signal line (42) is electrically connected to the light-emitting units (30) of one light-emitting unit group, the light-emitting units (30) located in the same sub-region (11) are electrically connected to the second sub-driving voltage signal line (42) of the same driving voltage signal line (40), and the total length of the portion of each first sub-driving voltage signal line (41) located within the light-emitting region (10) is substantially the same.

Description

Light-emitting substrate and display device TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a light-emitting substrate and a display device. BACKGROUND

[0002] With the development of display technology, Mini Light Emitting Diode (Mini-LED) has been widely used due to its advantages of realizing sub-area dimming, fast response and long service life.

[0003] The existing Mini-LED display panel has the problem of uneven brightness in different areas, which makes the display effect of the display panel poor.

[0004] SUMMARY

[0005] The present application provides a light-emitting substrate and a display device.

[0006] The first aspect of the present application provides a light-emitting substrate. The light-emitting substrate comprises a light-emitting area and a binding area located on one side of the light-emitting area, the light-emitting area comprises a sub-light-emitting area extending along a first direction, and the sub-light-emitting area comprises a plurality of sub-areas arranged along the first direction; the light-emitting substrate comprises:

[0007] a substrate;

[0008] a plurality of light-emitting units located on one side of the substrate; the light-emitting units in each sub-light-emitting area are arranged in groups along the first direction, each group of light-emitting units comprises a plurality of light-emitting units arranged along a second direction, and the second direction intersects the first direction; each sub-area is provided with at least one group of light-emitting units;

[0009] a plurality of driving voltage signal lines located between the substrate and the light-emitting units; each driving voltage signal line comprises a first sub-driving voltage signal line extending along the first direction and at least one second sub-driving voltage signal line extending along the second direction and electrically connected to the first sub-driving voltage signal line; one end of the first sub-driving voltage line is connected to the binding area, and the other end extends to the light-emitting area; each second sub-driving voltage signal line is electrically connected to the light-emitting units of one group of light-emitting units, and the light-emitting units located in the same sub-area are electrically connected to the second sub-driving voltage signal lines of the same driving voltage signal line; the total length of the part of each first sub-driving voltage signal line located in the light-emitting area is substantially the same.

[0010] In some embodiments, each of the first sub-driving voltage signal lines is in a meandering shape; in the plurality of first sub-driving voltage signal lines corresponding to the same sub-light emitting region, a projection of at least one of the first sub-driving voltage signal lines in the second direction overlaps with a projection of the rest of the first sub-driving voltage signal lines in the second direction.

[0011] In some embodiments, the first sub-driving voltage signal lines include first-type sub-driving voltage signal lines and second-type sub-driving voltage signal lines; the first-type sub-driving voltage signal lines are arranged on the same layer as the second-type sub-driving voltage signal lines;

[0012] The first-type sub-driving voltage signal lines are continuous wires in the sub-light emitting region, and the first-type sub-driving voltage signal lines are in a meandering shape;

[0013] The second-type sub-driving voltage signal lines include first sub-signal segments and second sub-signal segments, and the first sub-signal segments and the second sub-signal segments of the same second-type sub-driving voltage signal line are respectively located on two sides of the first-type sub-driving voltage signal lines;

[0014] The light emitting substrate further includes a connection wire segment located on a different layer from the second-type sub-driving voltage signal lines; the connection wire segment extends along the second direction, and the first sub-signal segments and the second sub-signal segments of the same second-type sub-driving voltage signal line are respectively electrically connected to the same connection wire segment.

[0015] In some embodiments, a portion of each of the first-type sub-driving voltage signal lines located in the light emitting region includes a plurality of first vertical portions and a plurality of first connection portions; the second-type sub-driving voltage signal lines include a plurality of second vertical portions and a plurality of second connection portions, and the first sub-signal segments and the second sub-signal segments respectively include at least one of the second vertical portions;

[0016] The first vertical portions and the second vertical portions extend along the first direction; the extension directions of the first connection portions and the second connection portions respectively intersect the first direction; each of the first connection portions is located between two adjacent first vertical portions, and two ends of the first connection portion are respectively connected to the adjacent first vertical portions; each of the second connection portions is located between two adjacent second vertical portions, and two ends of the second connection portion are respectively connected to the adjacent second vertical portions; each of the first vertical portions is located in one of the sub-regions, each of the second vertical portions is located in one of the sub-regions, the number of the first vertical portions in the same first-type sub-driving voltage signal line is the same as the number of the second vertical portions in the same second-type sub-driving voltage signal line, and the number of the first vertical portions and the number of the second vertical portions are respectively the same as the number of the sub-regions.

[0017] In some embodiments, in each of the second-type sub-driving voltage signal lines, the length of the second vertical part not connected to the connection wire segment is the same as the length of the second vertical part connected to the connection wire segment, and the length of the first vertical part is the same as the length of the second vertical part not connected to the connection wire segment.

[0018] In some embodiments, in the same first-type sub-driving voltage signal line, the first vertical parts are arranged in the second direction in sequence; when the first sub-signal segment includes a plurality of second vertical parts, the second vertical parts of the first sub-signal segment are arranged in the second direction; when the second sub-signal segment includes a plurality of second vertical parts, the second vertical parts of the second sub-signal segment are arranged in the second direction; and the first connection part and the second connection part have the same extension direction.

[0019] In some embodiments, each of the first sub-signal segments is connected to the binding area, each of the second sub-signal segments is located on a side of the first sub-signal segment away from the binding area, and each of the first sub-signal segments is located on one side of the first-type sub-driving voltage signal line, and each of the second sub-signal segments is located on the other side of the first-type sub-driving voltage signal line; in the first-type sub-driving voltage signal line, the first vertical part farthest from the binding area is connected to the second driving voltage signal line.

[0020] In some embodiments, in the direction towards the first-type sub-driving voltage signal line, the number of second vertical parts included in the first sub-signal segment gradually increases, and the difference between the number of first vertical parts included in two adjacent first sub-signal segments is 1; in the direction away from the first-type sub-driving voltage signal line, the number of second vertical parts included in the second sub-signal segment gradually decreases, and the difference between the number of second vertical parts included in two adjacent second sub-signal segments is 1.

[0021] In some embodiments, each of the first vertical parts and each of the second vertical parts is divided into a plurality of vertical part groups, each of the vertical part groups includes one first vertical part and a plurality of second vertical parts arranged in the first direction in intervals, and the same vertical part group includes one second vertical part of each of the second-type sub-driving voltage signal lines.

[0022] In some embodiments, the first vertical parts and the second vertical parts located in the same sub-area are parallel to each other, and the distance between any two adjacent vertical parts among the first vertical parts and the second vertical parts located in the same sub-area is equal.

[0023] In some embodiments, the second sub-driving signal line includes the connection wire segment, and the end of the first sub-signal segment and the end of the second sub-signal segment have projections on the substrate that overlap with the projection of the connection wire segment on the substrate.

[0024] In some embodiments, the second sub-driving signal line farthest from the binding area in the same sub-region includes the connection wire segment.

[0025] In some embodiments, the portion of each first sub-driving voltage signal line in the light emitting area is a straight line segment, a broken line segment or a curve segment, and the portions of the first sub-driving voltage signal lines in the light emitting area are arranged in the second direction.

[0026] In some embodiments, in each sub-region of the sub-light emitting area, the width of the first sub-driving voltage signal line electrically connected to the light emitting unit in each sub-region increases in sequence in the direction away from the binding area.

[0027] In some embodiments, the light emitting substrate further includes a plurality of data channel lines between the substrate and the light emitting units; one end of each data channel line is connected to the binding area, and the other end extends to the light emitting area along the first direction.

[0028] The plurality of light emitting units are arranged in a plurality of columns in the second direction, and the light emitting units in the same column are connected to a plurality of data channel lines; in the same column of light emitting units, the light emitting units in the same sub-region and in different groups of light emitting units are connected to different data channel lines.

[0029] A second aspect of the embodiments of the present application provides a display device including the light emitting substrate described above.

[0030] In the light emitting substrate provided by the embodiments of the present application, the total length of the portion of the first sub-driving voltage signal line in the light emitting area is substantially the same, so that the coupling voltage generated by the coupling of the same data channel line and different first sub-driving voltage signal lines is relatively small, and in the case that the driving voltages of the first sub-driving voltage signal lines are the same, the current flowing through the light emitting units in each sub-region is relatively small, which helps to reduce the brightness difference of the light emitting units in different sub-regions. It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the description.

[0032] FIG. 1 is a structural schematic diagram of a light-emitting substrate according to an embodiment of the present application;

[0033] FIG. 2 is a structural schematic diagram of a sub-light-emitting region in the embodiment shown in FIG. 1;

[0034] FIG. 3 is a structural schematic diagram of a light-emitting unit and a data channel line according to an embodiment of the present application;

[0035] FIG. 4 is a schematic diagram of a wiring arrangement of a first sub-driving voltage signal line according to an embodiment of the present application;

[0036] FIG. 5 is a schematic diagram of an electrical connection relationship of a light-emitting substrate according to an embodiment of the present application;

[0037] FIG. 6 is a schematic diagram of a wiring arrangement of a first sub-driving voltage signal line in the related art;

[0038] FIG. 7 is a structural schematic diagram of a light-emitting unit according to an embodiment of the present application;

[0039] FIG. 8 is a schematic diagram of a wiring arrangement of a first sub-signal segment and a second sub-signal segment in the embodiment shown in FIG. 4;

[0040] FIG. 9 is a schematic diagram of a wiring arrangement of a vertical portion and a connecting portion in the embodiment shown in FIG. 4;

[0041] FIG. 10 is a partial enlarged view of an A region in the embodiment shown in FIG. 8;

[0042] FIG. 11 is a schematic diagram of a wiring arrangement of a first sub-driving voltage signal line according to another embodiment of the present application;

[0043] FIG. 12 is a schematic diagram of a wiring arrangement of a first sub-driving voltage signal line according to yet another embodiment of the present application;

[0044] FIG. 13 is a voltage waveform diagram of the embodiment shown in FIG. 6;

[0045] FIG. 14 is a voltage waveform diagram of the embodiment shown in FIG. 4. DETAILED DESCRIPTION

[0046] The light-emitting substrate and the display device according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the features in the following embodiments and implementation manners can be complementary or combined with each other.

[0047] The present application provides a light-emitting substrate. As shown in FIG. 1 and FIG. 2, the light-emitting substrate 100 includes a light-emitting region 10 and a bonding region 20 located at one side of the light-emitting region 10, the light-emitting region 10 includes a sub-light-emitting region 11 extending along a first direction X, and the sub-light-emitting region 11 includes a plurality of sub-regions 12 arranged along the first direction X.

[0048] As shown in FIG. 3, the light-emitting substrate comprises a substrate, a plurality of light-emitting units 30 located on one side of the substrate, and a plurality of driving voltage signal lines 40 located between the substrate and the light-emitting units 30. The light-emitting units 30 located in each of the sub-light-emitting areas 11 are arranged in groups in the first direction X, each group of light-emitting units comprises a plurality of light-emitting units 30 arranged in the second direction Y, the second direction Y intersects the first direction X, and each of the sub-areas 12 is provided with at least one group of light-emitting units. As shown in FIG. 4, each of the driving voltage signal lines 40 comprises a first sub-driving voltage signal line 41 extending in the first direction X and at least one second sub-driving voltage signal line 42 extending in the second direction Y and electrically connected to the first sub-driving voltage signal line 41. One end of the first sub-driving voltage line 41 is connected to the binding area 20, and the other end extends to the light-emitting area 10. Each of the second sub-driving voltage signal lines 42 is electrically connected to the light-emitting units 30 of one group of light-emitting units, and the light-emitting units 30 located in the same sub-area 11 are electrically connected to the second sub-driving voltage signal lines 42 of the same driving voltage signal line 40. The total length of the part of each of the first sub-driving voltage signal lines 41 located in the light-emitting area 10 is substantially the same.

[0049] The total length of the part of each of the first sub-driving voltage signal lines 41 located in the light-emitting area 10 being substantially the same means that the total length of the part of each of the first sub-driving voltage signal lines 41 located in the light-emitting area 10 is the same or has a small difference, for example, the length difference between the first sub-driving voltage signal line 41 with the maximum total length and the first sub-driving voltage signal line 41 with the minimum total length, and the ratio of the length difference to the total length of the first sub-driving voltage signal line 41 with the maximum total length ranges from -10% to 10%. When the part of the first sub-driving voltage signal line 41 located in the light-emitting area 10 is in the shape of a broken line, the total length refers to the sum of the lengths of each line segment of the broken line; when the part of the first sub-driving voltage signal line 41 located in the light-emitting area 10 is in the shape of a curve, the total length refers to the total length of the curve.

[0050] The first sub-driving voltage signal line 41 comprises a part located in the light-emitting area 10 and a fan-out line segment 21 located between the light-emitting area 10 and the binding area 20, and the two ends of the fan-out line segment 21 are respectively connected to the binding terminal of the binding area 20 and the part of the first sub-driving voltage signal line 41 located in the light-emitting area 10. The length of the fan-out line segment 21 of the first sub-driving voltage signal line 41 is much smaller than the length of the part located in the light-emitting area 10, and the lengths of the fan-out line segments 21 of each of the first sub-driving voltage signal lines 41 have a small difference.

[0051] In one embodiment, the first direction X and the second direction Y are perpendicular to each other. In some embodiments, the first direction X can be a row direction and the second direction Y can be a column direction in the present application.

[0052] In the embodiment shown in FIG. 1, the light emitting region 10 of the light emitting substrate 100 includes four sub-light emitting regions 11 extending along the first direction X, and the bonding region 20 includes four sub-bonding regions 201 arranged along the second direction Y, each of which is provided with a plurality of bonding terminals, and the bonding terminals of each sub-bonding region 201 are electrically connected to a driving chip. In the embodiment shown in FIG. 2, the sub-light emitting region 11 includes eight sub-regions 12 arranged along the first direction X.

[0053] As shown in FIG. 3, the sub-light emitting region 11 includes sub-regions 121-128. Each sub-region 12 is provided with a plurality of light emitting unit groups 31, for example, each sub-region 12 is provided with three light emitting unit groups 31, and the light emitting units 30 of each light emitting unit group 31 are arranged in a row along the first direction X.

[0054] In one embodiment, the light emitting substrate 100 further includes a plurality of data channel lines CH between the substrate and the light emitting units; one end of each data channel line CH is connected to the bonding region 20 and connected to a data channel chip through the bonding terminals of the bonding region 20, and the other end extends to the light emitting region 10 along the first direction X; the light emitting units 30 in the sub-light emitting region 11 are arranged in a plurality of columns, and the light emitting units 30 in the same column are connected to a plurality of data channel lines CH, and among the light emitting units 30 in the same column, the light emitting units 30 in the same sub-region 12 and in different light emitting unit groups 31 are connected to different data channel lines CH. As shown in FIG. 3, the sub-light emitting region 11 includes eight sub-regions 121-128 arranged along the first direction X, each sub-region 12 is provided with three light emitting unit groups 31, each light emitting unit group includes twelve light emitting units 30 arranged along the second direction Y; the light emitting units 30 are arranged in twelve columns along the second direction Y, and each column of light emitting units includes twenty-four light emitting units 30; a total of thirty-six data channel lines CH, i.e., data channel lines CH1-CH36, are provided in the sub-light emitting region 11, each data channel line CH is connected to a plurality of light emitting units 30; each sub-region 12 is provided with three light emitting unit groups 31; among the light emitting units in the leftmost column, the three light emitting units 30 in different sub-regions 12 are connected to different data channel lines, and the light emitting unit 30 farthest from the bonding region 20 in each sub-region 12 is connected to the data channel line CH1, the light emitting unit 30 closest to the bonding region 20 is connected to the data channel line CH3, and the light emitting unit 30 at the middle position is connected to the data channel line CH2.

[0055] In some embodiments, all the first sub-driving voltage signal lines 41 are adjacent to each other within the same sub-light emitting region 11, and a part of the data channel lines CH are distributed on one side of each first sub-driving voltage signal line, and the rest of the data channel lines are distributed on the other side of each first sub-driving voltage signal line.

[0056] Figure 5 shows a schematic diagram of the electrical connection relationship between the driving voltage signal lines 40, the light emitting units 30 and the data channel lines CH. The anode of the light emitting unit 30 is connected to the driving voltage signal line 40, and the cathode is connected to the data channel line CH. The first switch transistor NMUX1-NMUX8 controls whether the driving voltage signal flows into the first sub-driving voltage signal line connected thereto, and the second switch transistor NCH1 and NCH8 controls whether the data channel signal flows into the data channel line connected thereto. In the embodiment shown in Figure 5, in order to simplify the circuit structure, only two driving signal lines 40, the data channel line CH1 and the data channel line CH28 are shown. When the data channel line connected to the light emitting unit has the data channel signal flowing therein, and the first sub-driving voltage signal line connected to the light emitting unit has the driving signal flowing therein, the light emitting unit emits light, for example, in the case where the first switch transistor NMUX1 and the second switch transistor NCH28 are turned on, the light emitting unit LED1-28 connected to the first sub-driving voltage signal line 411 and the data channel line CH28 emits light; in the case where the first switch transistor NMUX8 and the second switch transistor NCH28 are turned on, the light emitting unit LED8-28 connected to the first sub-driving voltage signal line 418 and the data channel line CH28 emits light.

[0057] The coupling voltage generated by the coupling of the data channel line CHi and the first sub-driving voltage signal line 41j connected to the same light emitting unit can be calculated according to the following formula: V CHi = V 41j * C LEDj-i / (C 总 + C PCHi )

[0058] wherein V CHi is the coupling voltage generated by the coupling of the data channel line CHi and the first sub-driving voltage signal line 41j; V 41j is the driving voltage of the first sub-driving voltage signal line 41j; C LEDj-i is the parasitic capacitance between the first sub-driving voltage signal line 41j and the data channel line CHi; C 总 is the sum of the parasitic capacitances between the first sub-driving voltage signal lines 411-418 and the data channel line CHi; C PCHi is the capacitance of the data channel line CHi to ground; i is an integer selected from 1 to 28, and j is an integer selected from 1 to 8. The sum of the parasitic capacitances between the first sub-driving voltage signal lines 411-418 and different data channel lines is C 总The difference is very small and can be considered the same; the ground capacitance C of different data channel lines PCHi The difference is very small and can be considered the same.C LEDj-i The length of the first sub-drive voltage signal line 41j is related to the length of the first sub-drive voltage signal line 41j. The greater the length of the first sub-drive voltage signal line 41j, the greater the length of the first sub-drive voltage signal line 41j. LEDj-i

[0059] Figure 6 is a schematic diagram of the structure of a light-emitting substrate in the related art. The total length of different first sub-drive voltage signal lines 41' differs greatly. Each first sub-drive voltage signal line 41' is electrically connected to a light-emitting unit in a sub-region 12'. The farther the sub-region 12' is from the binding area 20', the longer the length of the first sub-drive voltage signal line 41' corresponding to the sub-region 12'. That is, in the direction from the first drive voltage signal line 411' to the drive voltage signal line 418', the length of the first drive voltage signal line 41' gradually decreases.

[0060] In the embodiment shown in Figure 6, the connection relationship between the light-emitting unit and the data channel line is as shown in Figure 3. Taking the light-emitting unit connected to the data channel line CH28 as an example for analysis. Since the parasitic capacitance between the first sub-drive voltage signal lines 411'-418' and the data channel line CH28 is proportional to the total length of the first sub-drive voltage signal line, and the total length of different first sub-drive voltage signal lines 41' differs greatly, the parasitic capacitance between different first sub-drive voltage signal lines and the data channel line CH28 differs greatly, which in turn causes the voltage coupled from the data channel line CH28 at different first sub-drive voltage signal lines 41' to differ greatly, and in turn causes the current of different light-emitting units connected to the data channel line CH28 to differ greatly, which in turn causes the luminance of light-emitting units in different sub-regions in the light-emitting substrate to be uneven. Specifically, when the driving voltage of each first sub-drive voltage signal line 41' is the same, among the voltage coupled from each first sub-drive voltage signal line 41' by the data channel line CH28, the voltage coupled from the first sub-drive voltage signal line 411' by the data channel line CH28 is the largest, which causes the effective current flowing through the light-emitting unit LED1-28 to be the smallest, resulting in the lowest luminance of the light-emitting unit LED1-28; the voltage coupled from the first sub-drive voltage signal line 418' by the data channel line CH28 is the smallest, which causes the effective current flowing through the light-emitting unit LED8-28 to be the largest, resulting in the luminance of the light-emitting unit LED8-28 being higher than that of the light-emitting unit LED1-28.

[0061] ​The total length difference of the first sub driving voltage signal lines 411-418 is small, and the coupling voltage difference generated by the same data channel line CH and different first sub driving voltage signal lines is small. In the case that the driving voltages of the first sub driving voltage signal lines are the same, the current flowing through the light emitting units 30 in each sub region 12 is small, which helps to reduce the brightness difference of the light emitting units 30 in different sub regions 12.

[0062] In an embodiment, each light emitting unit 30 includes a driving circuit and at least one light emitting element 301 electrically connected to the driving circuit. As shown in FIG. 7, when the light emitting unit 30 includes a plurality of light emitting elements 301, the plurality of light emitting elements 301 of the same light emitting unit 30 can be divided into two sub units, and the two sub units are connected in parallel, and each sub unit includes a plurality of light emitting elements 301 connected in series. For example, each sub unit can include three light emitting elements 301 connected in series. In other embodiments, the plurality of light emitting elements 301 of the light emitting unit 30 can be connected in series.

[0063] In an embodiment, the light emitting element 301 can include an inorganic light emitting diode with a size in the order of hundreds of microns or less. The inorganic light emitting diode with a size in the order of hundreds of microns or less can be a mini LED or a micro LED. The size of the mini LED ranges from about 100 μm to about 500 μm, and the size of the micro LED is less than 100 μm. The driving circuit can be used to provide a signal to the inorganic light emitting diode to make the inorganic light emitting diode emit light.

[0064] In one embodiment, each of the first sub-driving voltage signal lines 41 is in a meandering shape, and at least one of the first sub-driving voltage signal lines 41 corresponding to the same sub-emitting region 11 has an overlapping projection in the second direction Y with the rest of the first sub-driving voltage signal lines 41. The first sub-driving voltage signal lines 41 in the emitting region 10 can be divided into groups, each group of first sub-driving voltage signal lines corresponding to a sub-emitting region 11. The projection of the first sub-driving voltage signal line 41 in the second direction Y refers to the projection of the first sub-driving voltage signal line 41 on a straight line extending in the second direction Y. In some embodiments, at least one of the first sub-driving voltage signal lines 41 has an overlapping projection in the second direction Y with the rest of the first sub-driving voltage signal lines 41. In this way, the arrangement of the first sub-driving voltage signal lines in the same group can be more compact, which is more conducive to saving wiring space. In the embodiment shown in FIG. 4, the first sub-driving voltage signal lines 411-418 are a group of sub-driving voltage signal lines, and the projections of the first sub-driving voltage signal lines 411-418 in the second direction Y all overlap.

[0065] In one embodiment, the light-emitting substrate 100 comprises a first conductive film layer, a second conductive film layer and an insulating layer between the substrate and the light-emitting unit 30, the first conductive film layer is between the insulating layer and the substrate, and the second conductive film layer is on the side of the insulating layer away from the substrate. The first conductive film layer comprises signal lines, and the second conductive film layer comprises signal lines, pads for mounting light-emitting elements and connection traces, which can include traces for connecting light-emitting elements 301 in the same light-emitting unit 30. In some embodiments, as shown in FIGS. 4, 8 and 9, the first sub-driving voltage signal lines 41 comprise first sub-driving voltage signal lines 43 and second sub-driving voltage signal lines 44; the first sub-driving voltage signal lines 43 and the second sub-driving voltage signal lines 44 are arranged in the same layer; the first sub-driving voltage signal lines 43 are continuous traces within the sub-light-emitting area 11, and the first sub-driving voltage signal lines 43 are in a meandering shape; the second sub-driving voltage signal lines 44 comprise first sub-signal segments 44a and second sub-signal segments 44b, and the first sub-signal segments 44a and the second sub-signal segments 44b of the same second sub-driving voltage signal line 44 are respectively located on the two sides of the first sub-driving voltage signal line 43; the light-emitting substrate further comprises connection trace segments 45 in a different layer from the second sub-driving voltage signal lines 44; the connection trace segments 45 extend along the second direction Y, and the first sub-signal segments 44a and the second sub-signal segments 44b of the same second sub-driving voltage signal line 44 are respectively electrically connected to the same connection trace segment 45. In this way, the arrangement structure of the first sub-driving voltage signal lines 41 can be optimized, and the length of each first sub-driving voltage signal line 41 is substantially the same while the space occupied by the first sub-driving voltage signal lines 41 is reduced. In one embodiment, as shown in FIG. 8, the light-emitting substrate comprises one first sub-driving voltage signal line 43 and a plurality of second sub-driving voltage signal lines 44, the first sub-signal segments 441a-447a of each second sub-driving voltage signal line 44 are located on the same side of the first sub-driving voltage signal line 43, and the second sub-signal segments 441b-447b of each second sub-driving voltage signal line 44 are all located on the other side of the first sub-driving voltage signal line 43.

[0066] In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, the second sub-driving signal line 44 includes the connection wire segment 45, and the end of the first sub-signal segment 44a and the end of the second sub-signal segment 44b have a projection on the substrate that overlaps with the projection of the connection wire segment 45 on the substrate. By setting the connection wire segment 45 as a part of the second sub-driving signal line 42, the complexity of the wire of the light-emitting substrate can be simplified; since the end of the first sub-signal segment 44a and the end of the second sub-signal segment 44b have a projection on the substrate that overlaps with the projection of the connection wire segment 45 on the substrate, the end of the first sub-signal segment 44a and the end of the second sub-signal segment 44b can be directly connected to the connection wire segment through the via hole penetrating the insulating layer, and the process is easy to implement.

[0067] In one embodiment, the first sub-driving signal line 41 is located in the first conductive film layer, and the second sub-driving signal line 42 is located in the second conductive film layer. In this way, the second sub-driving signal line 42 and the pad for mounting the light-emitting unit 30 are located in the same conductive film layer, which facilitates the connection between the two. In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, each of the first type of sub-driving voltage signal line 43 includes a plurality of first vertical portions 431 and a plurality of first connection portions 432; the second type of sub-driving voltage signal line 44 includes a plurality of second vertical portions 44c and a plurality of second connection portions 44d, and the first sub-signal segment 44a and the second sub-signal segment 44b each include at least one second vertical portion 44c.

[0068] The first vertical portion 431 and the second vertical portion 44c extend along the first direction X; the extension direction of the first connection portion 432 and the extension direction of the second connection portion 44d are perpendicular to the first direction X; each of the first connection portions 432 is located between two adjacent first vertical portions 431, and the two ends of the first connection portion 432 are connected to the adjacent first vertical portions 431; each of the second connection portions 44d is located between two adjacent second vertical portions 44c, and the two ends of the second connection portion 44d are connected to the adjacent second vertical portions 44c; each of the first vertical portions 431 is located in one of the sub-areas 12, each of the second vertical portions 44c is located in one of the sub-areas 12, the number of first vertical portions 431 in the same first type of sub-driving voltage signal line 43 is the same as the number of second vertical portions 44d in the same second type of sub-driving voltage signal line 44, and is the same as the number of sub-areas 12.

[0069] The first vertical part 431 and the second vertical part 44c both extend in the first direction X, facilitating the connection of the second sub-drive voltage signal line 42 located in the sub-region 12 with the first vertical part 431 or the second vertical part 44c of the same sub-region; by setting the number of the first vertical part 431 in the same first type of sub-drive voltage signal line 43 and the number of the second vertical part 44c in the same second type of sub-drive voltage signal line 44 to be the same as the number of the sub-region 12, it is helpful to reduce the difference in the length of each first sub-drive voltage signal line 43, and also can avoid the length of the first sub-drive voltage signal line 41 being too long, resulting in the resistance of the first sub-drive voltage signal line 41 increasing, the voltage drop of the driving voltage on the first sub-drive voltage signal line 41 increasing, and ultimately leading to the overall brightness of the light-emitting substrate being dark.

[0070] In the first type of sub-drive voltage signal line 43, the number of the first connecting part 432 is one less than the number of the first vertical part 431; in the second sub-drive voltage signal line 44, the number of the second connecting part 44d is two less than the number of the second vertical part 44c. In the embodiment shown in FIG. 9, the sub-light-emitting region includes eight sub-regions 12, the first type of sub-drive voltage signal line 43 includes eight first vertical parts 431 and seven first connecting parts 432; each second type of sub-drive voltage signal line 44 includes eight second vertical parts 44c and six second connecting parts 44d.

[0071] In one embodiment, as shown in FIG. 10, in each of the second type of sub-drive voltage signal line 44, the length of the second vertical part 44c1 not connected to the connection wire segment 45 is the same, the length of the second vertical part 44c2 connected to the connection wire segment is the same and greater than the length of the second vertical part 44c1 not connected to the connection wire segment; the length of the first vertical part 431 is the same as the length of the second vertical part 44c1 not connected to the connection wire segment 45, and the length of the first connecting part is the same as the length of the second connecting part. Although the number of the first connecting part of the first type of sub-drive voltage signal line 43 is one more than the number of the second connecting part of the second type of sub-drive voltage signal line 44, the length of the two second vertical parts 44c2 connected to the connection wire segment 45 in the second type of sub-drive voltage signal line 44 is greater than the length of the first vertical part 431, so that the total length of the first type of sub-drive voltage signal line 43 is substantially the same as the total length of the second type of sub-drive voltage signal line 44.

[0072] In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, the first type of sub-driving voltage signal lines 43 are arranged in the same first type of sub-driving voltage signal line 43, and the first vertical portions 431 are arranged in sequence in the second direction Y. When the first sub-signal segment 44a includes the second vertical portions 44c, the second vertical portions 44c of the first sub-signal segment 44a are arranged in the second direction Y. When the second sub-signal segment 44b includes the second vertical portions 44d, the second vertical portions 44c of the second sub-signal segment 44b are arranged in the second direction Y. The first connecting portions 432 and the second connecting portions 44d have the same extension direction.

[0073] The first type of sub-driving voltage signal lines 43 are connected by the first vertical portions 431 and the first connecting portions 432 to form a zigzag-shaped trace. When the first sub-signal segment 44a and the second sub-signal segment 44b include the second vertical portions 44c, the first sub-signal segment 44a and the second sub-signal segment 44b are also zigzag-shaped traces. Since the first vertical portions 431 and the second vertical portions 44c extend in the first direction X, the first type of sub-driving voltage signal lines, the first sub-signal segment 44a and the second sub-signal segment 44b have the same bending shape, and the first type of sub-driving voltage signal lines 43 and the second type of sub-driving voltage signal lines 44 are arranged more regularly, which helps to reduce the space occupied.

[0074] In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, each of the first sub-signal segments 44a is connected to the binding area 20, each of the second sub-signal segments 44b is located on the side of the first sub-signal segment 44a away from the binding area 20, and each of the first sub-signal segments 44a is located on the same side of the first type of sub-driving voltage signal line 43, and each of the second sub-signal segments 44b is located on the other side of the first type of sub-driving voltage signal line 43. In the first type of sub-driving voltage signal line 43, the first vertical portion farthest from the binding area 20 is connected to the second sub-driving voltage signal line 42.

[0075] In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, in the direction towards the first type of sub-driving voltage signal line 43, the number of second vertical portions 44c included in the first sub-signal segment 44a gradually increases, and the difference in the number of first vertical portions 431 included in adjacent two first sub-signal segments 44a is 1. In the direction away from the first type of sub-driving voltage signal line 43, the number of second vertical portions 44c included in the second sub-signal segment 44b gradually decreases, and the difference in the number of second vertical portions 44c included in adjacent two second sub-signal segments 44b is 1.

[0076] In the embodiments shown in FIG. 4, FIG. 8 and FIG. 9, the first type of sub-driving voltage signal line 43 includes eight first vertical portions 431, from the first sub-signal segment 441a to the first sub-signal segment 447a, the number of second vertical portions 44c increases from one to seven in sequence; from the second sub-signal segment 441b to the second sub-signal segment 447b, the number of second vertical portions 44c decreases from seven to one. In this way, the space occupied by the first sub-driving voltage signal line in the same sub-emitting region can be further reduced.

[0077] In some embodiments, as shown in FIG. 9, each of the first vertical portions 431 and each of the second vertical portions 44c are divided into a plurality of vertical portion groups B, each of the vertical portion groups B includes one first vertical portion 431 and a plurality of second vertical portions 44c arranged at intervals in the first direction X, and the same vertical portion group includes one second vertical portion 44c of each of the second type of sub-driving voltage signal lines 44.

[0078] In the embodiment shown in FIG. 9, in the vertical portion group B in the leftmost column, the uppermost is the first vertical portion 431, and below the first vertical portion 431 are arranged in sequence one second vertical portion 44c of the first sub-signal segment 441a to the first sub-signal segment 447a. In the second column of vertical portion groups, from top to bottom are the second vertical portion 44c of the second sub-signal segment 44b, the first vertical portion 431, the second vertical portion 44c of the first sub-signal segment 441a to the first sub-signal segment 446a. The arrangement of the first vertical portion 431 and the second vertical portion 44c in other vertical portion groups is similar. In the wiring structure formed in this way, each sub-region 12 includes one first vertical portion 431 and one second vertical portion 44c of different second type of sub-driving voltage signal lines 44. In this way, the arrangement of the first sub-driving voltage signal line in the same sub-emitting region 11 can be more regular, which is more conducive to reducing the space occupied.

[0079] In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, in the same group of vertical portion groups, the center lines of the first vertical portion 431 and the second vertical portion 44c are on the same straight line, which can make the arrangement of each first sub-driving voltage signal line more compact, and is more conducive to saving wiring space.

[0080] In some embodiments, as shown in FIG. 4, FIG. 8 and FIG. 9, the first vertical part 431 and the second vertical part 44c in the same sub-area 12 are parallel to each other, and the distance between any two adjacent vertical parts in the first vertical part 431 and the second vertical part 44c in the same sub-area 12 is equal. In this way, the space occupied by the gap between the two adjacent vertical parts in the same sub-area 12 can be reduced, thereby further reducing the space occupied by all the first sub-driving voltage signal lines 41 in the same sub-emitting area 11, under the premise that the minimum distance between the two adjacent vertical parts in the same sub-area 12 meets the signal interference requirement.

[0081] In some embodiments, the second sub-driving voltage signal line 42 in the same sub-area 12 that is farthest from the binding area includes the connection wire segment 45.

[0082] In some embodiments, the part of each first sub-driving voltage signal line 41 in the emitting area is a straight line segment, a broken line segment or a curve segment, and the parts of the first sub-driving voltage signal lines 41 in the emitting area are arranged at intervals in the second direction Y. In the embodiment shown in FIG. 11, each first sub-driving voltage signal line 41 is a straight line extending in the first direction X. In this way, the preparation process of the first sub-driving voltage signal line 41 is simple, which is conducive to reducing the process cost. In the embodiment shown in FIG. 12, each first sub-driving voltage signal line 41 can also be a broken line segment. In this way, each first sub-driving voltage signal line is a continuous wire, which helps to simplify the preparation process.

[0083] In some embodiments, in each sub-area 12 of the sub-emitting area 11, the width of the first sub-driving voltage signal line 41 electrically connected to the light emitting unit 30 in each sub-area 12 increases in the direction away from the binding area 20. As shown in FIG. 10, the first type of sub-driving signal line 43 is connected to the light emitting unit in the sub-area 121 farthest from the binding area. In order to reduce the impedance of the first type of sub-driving signal line 43, the first type of sub-driving signal line 42 needs to be set to be relatively thick. The second type of sub-driving voltage signal line 418 is connected to the light emitting unit in the sub-area 128 closest to the binding area. The impedance of the second type of sub-driving voltage signal line 418 itself is low, and it can be set to be relatively thin. In this way, the effective current flowing through the light emitting units in different sub-areas can be more uniform, which is conducive to improving the brightness uniformity of the light emitting substrate.

[0084] The application respectively measures the voltage of the light-emitting substrate of the two embodiments shown in FIG. 6 and FIG. 4, and obtains the waveform diagrams of FIG. 13 and FIG. 14. FIG. 13 and FIG. 14 are the waveform diagrams of data channel line CH8 and data channel line CH28 when the first sub-driving voltage signal line 411 and the first sub-driving voltage signal line 417 apply driving voltage. Wherein, the solid line a represents the voltage waveform of data channel line CH28, the dashed line b represents the voltage waveform of data channel line CH8, the dot-dashed line c represents the voltage waveform of the first sub-driving voltage signal line 411, and the double dot-dashed line d represents the voltage waveform of the first sub-driving voltage signal line 417.

[0085] As can be seen from FIG. 13, in the two cases that the voltage signal of the first sub-driving voltage signal line 411' is high and the voltage signal of the first sub-driving voltage signal line 417' is low, and the voltage signal of the first sub-driving voltage signal line 411' is low and the voltage signal of the first sub-driving voltage signal line 417' is high, the voltage waveform of data channel line CH8 and the voltage waveform of data channel line CH28 are quite different. Therefore, when the wiring mode of FIG. 6 is adopted, the light-emitting substrate has obvious bright-dark uneven phenomenon.

[0086] As can be seen from FIG. 14, in the two cases that the voltage signal of the first sub-driving voltage signal line 411 is high and the voltage signal of the first sub-driving voltage signal line 417 is low, and the voltage signal of the first sub-driving voltage signal line 411 is low and the voltage signal of the first sub-driving voltage signal line 417 is high, the voltage waveforms of data channel lines CH8 and CH28 are basically unchanged. Therefore, when the wiring mode of FIG. 4 is adopted, the light-emitting substrate has good brightness uniformity.

[0087] The application also provides a display device, which comprises the light-emitting substrate according to any of the above embodiments.

[0088] In one embodiment, the display device is a liquid crystal display device, and the light-emitting substrate is used as a backlight source of a liquid crystal display panel. The liquid crystal display device further comprises a liquid crystal panel, which is located on the side of the light-emitting substrate away from the substrate.

[0089] In another embodiment, each inorganic light-emitting element of the display device is used as a sub-pixel.

[0090] The application is not specifically limited to the application to the display device, which can be a television, a notebook computer, a tablet computer, a wearable display device, a mobile phone, a vehicle-mounted display, a navigation device, an electronic book, a digital photo frame, an advertising light box, or any product or component with display function.

Claims

1. A light-emitting substrate, characterized by, The light-emitting substrate comprises a light-emitting region and a bonding region on one side of the light-emitting region. The light-emitting region comprises sub-light-emitting regions extending along a first direction, and each sub-light-emitting region comprises a plurality of sub-regions arranged along the first direction. The light-emitting substrate comprises: a substrate; a plurality of light-emitting units on one side of the substrate; the light-emitting units in each sub-light-emitting region are arranged in groups along the first direction, and each group of light-emitting units comprises a plurality of light-emitting units arranged along a second direction intersecting the first direction; and each sub-region is provided with at least one group of light-emitting units; a plurality of driving voltage signal lines between the substrate and the light-emitting units; each driving voltage signal line comprises a first sub-driving voltage signal line extending along the first direction and at least one second sub-driving voltage signal line extending along the second direction and electrically connected to the first sub-driving voltage signal line; one end of the first sub-driving voltage line is connected to the bonding region, and the other end extends to the light-emitting region; each second sub-driving voltage signal line is electrically connected to the light-emitting units of one group of light-emitting units; the light-emitting units in the same sub-region are electrically connected to the second sub-driving voltage signal lines of the same driving voltage signal line; and the total length of the part of each first sub-driving voltage signal line in the light-emitting region is substantially the same.

2. The light emitting substrate of claim 1, wherein, Each first sub-driving voltage signal line is in a bent shape; in the plurality of first sub-driving voltage signal lines corresponding to the same sub-light-emitting region, the orthogonal projection of at least one first sub-driving voltage signal line in the second direction overlaps the orthogonal projection of the remaining first sub-driving voltage signal lines in the second direction.

3. The light emitting substrate of claim 1, wherein, The first sub-driving voltage signal line comprises a first type of sub-driving voltage signal line and a second type of sub-driving voltage signal line; the first type of driving voltage signal line and the second type of sub-driving voltage signal line are arranged on the same layer; The first type of driving voltage signal line is a continuous trace in the sub-light-emitting region, and the first type of sub-driving voltage signal line is in a bent shape; The second type of sub-driving voltage signal line comprises a first sub-signal segment and a second sub-signal segment; the first sub-signal segment and the second sub-signal segment of the same second type of sub-driving voltage signal line are located on the two sides of the first type of sub-driving voltage signal line, respectively; The light-emitting substrate further comprises a connection trace segment located on a different layer from the second type of sub-driving voltage signal line; the connection trace segment extends along the second direction; the first sub-signal segment and the second sub-signal segment of the same second type of sub-driving voltage signal line are electrically connected to the same connection trace segment, respectively.

4. The light emitting substrate of claim 3, wherein, Each first type of sub-driving voltage signal line comprises a plurality of first vertical portions and a plurality of first connection portions; the second type of sub-driving voltage signal line comprises a plurality of second vertical portions and a plurality of second connection portions; the first sub-signal segment and the second sub-signal segment each comprise at least one second vertical portion. The first vertical part and the second vertical part extend along the first direction; the extension direction of the first connecting part and the extension direction of the second connecting part respectively intersect with the first direction; each first connecting part is located between two adjacent first vertical parts, and the two ends of the first connecting part are connected with the adjacent first vertical parts respectively; each second connecting part is located between two adjacent second vertical parts, and the two ends of the second connecting part are connected with the adjacent second vertical parts respectively; each first vertical part is located in one sub-region, each second vertical part is located in one sub-region, the number of first vertical parts in the same first type sub-drive voltage signal line is the same as the number of second vertical parts in the same second type sub-drive voltage signal line, and is the same as the number of sub-regions respectively.

5. The light emitting substrate of claim 4, wherein, In each second type sub-drive voltage signal line, the length of at least one second vertical part not connected with the connecting wire segment is the same, the length of at least one second vertical part connected with the connecting wire segment is the same and greater than the length of the second vertical part not connected with the connecting wire segment; the length of at least one first vertical part is the same as the length of the second vertical part not connected with the connecting wire segment, and the length of at least one first connecting part is the same as the length of the second connecting part.

6. The light emitting substrate of claim 4, wherein, In the same first type sub-drive voltage signal line, the plurality of first vertical parts are arranged in the second direction in sequence; when the first sub-signal segment includes a plurality of second vertical parts, the plurality of second vertical parts of the first sub-signal segment are arranged in the second direction; when the second sub-signal segment includes a plurality of second vertical parts, the plurality of second vertical parts of the second sub-signal segment are arranged in the second direction; the extension direction of the first connecting part is the same as the extension direction of the second connecting part.

7. The light emitting substrate of claim 6, wherein, Each first sub-signal segment is connected to the binding area, each second sub-signal segment is located on the side of the first sub-signal segment away from the binding area, each first sub-signal segment is located on the same side of the first type sub-drive voltage signal line, and each second sub-signal segment is located on the other side of the first type sub-drive voltage signal line; in the first type sub-drive voltage signal line, the first vertical part farthest from the binding area is connected with the second drive voltage signal line.

8. The light emitting substrate of claim 7, wherein, In the direction towards the first type sub-drive voltage signal line, the number of second vertical parts included in the first sub-signal segment gradually increases, and the difference between the number of first vertical parts included in adjacent first sub-signal segments is 1; in the direction away from the first type sub-drive voltage signal line, the number of second vertical parts included in the second sub-signal segment gradually decreases, and the difference between the number of second vertical parts included in adjacent second sub-signal segments is 1.

9. The light emitting substrate of claim 8, wherein, Each first vertical part and each second vertical part is divided into a plurality of vertical part groups, each vertical part group includes one first vertical part and a plurality of second vertical parts arranged at intervals in the first direction, and the same vertical part group includes one second vertical part of each second type sub-drive voltage signal line.

10. The light emitting substrate of claim 9, wherein, The first vertical part and the second vertical part in the same sub-region are parallel to each other, and the distance between any two adjacent vertical parts in the first vertical part and the second vertical part in the same sub-region is equal.

11. The light emitting substrate of claim 3, wherein, The second sub-driving signal line includes the connection wire segment, and the end of the first sub-signal segment and the end of the second sub-signal segment have projections on the substrate, respectively, which overlap the projection of the connection wire segment on the substrate.

12. The light emitting substrate of claim 11, wherein, The second sub-driving voltage signal line farthest from the binding area in the same sub-region includes the connection wire segment.

13. The light emitting substrate of claim 1, wherein, The part of each first sub-driving voltage signal line in the light-emitting area is a straight line segment, a broken line segment or a curved line segment, and the parts of the first sub-driving voltage signal lines in the light-emitting area are arranged in the second direction.

14. The light emitting substrate of claim 1, wherein, In each sub-region of the sub-light-emitting area, the width of the first sub-driving voltage signal line electrically connected to the light-emitting unit in each sub-region increases in the direction away from the binding area.

15. The light emitting substrate of claim 1, wherein, The light-emitting substrate further includes a plurality of data channel lines between the substrate and the light-emitting unit; one end of each data channel line is connected to the binding area, and the other end extends to the light-emitting area along the first direction. The plurality of light-emitting units are arranged in multiple columns in the second direction, and the same column of light-emitting units is connected to a plurality of data channel lines; in the same column of light-emitting units, the light-emitting units in the same sub-region and in different groups of light-emitting units are connected to different data channel lines.

16. A display device comprising: The display device includes the light-emitting substrate of any one of claims 1 to 15.

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