Light-emitting device

Abstract

The invention discloses a light-emitting device. The light-emitting device comprises at least two auxiliary electrode layers including a first auxiliary electrode layer and a second auxiliary electrode layer; the first auxiliary electrode layer comprises a plurality of electrode groups, each electrode group comprises n first auxiliary electrodes which are sequentially arranged in the first direction, and each first auxiliary electrode comprises linear sections and annular sections which are sequentially and alternately arranged in the second direction; the second auxiliary electrode layer comprises a plurality of second auxiliary electrodes, the second auxiliary electrodes extend in the third direction, and each second auxiliary electrode is electrically connected with the two annular sections of the two first auxiliary electrodes at the same positions in the two adjacent electrode groups; wherein the third direction and the first direction intersect with each other; the auxiliary electrode layer is used for transmitting a driving signal to the light-emitting unit layer. The light-emitting uniformity of the light-emitting device is improved.

Description

Technical Field

[0001] The present invention relates to the field of organic light emitting technology, and in particular to a light emitting device. Background Art

[0002] Organic light-emitting devices are widely used in light-emitting devices such as display and lighting due to their advantages such as active light emission, wide color gamut, fast response, wide viewing angle, high contrast, and planarization. However, existing light-emitting devices have the problem of uneven light brightness. Summary of the invention

[0003] The present invention provides a light emitting device to improve the light emitting uniformity of the light emitting device.

[0004] According to one aspect of the present invention, there is provided a light emitting device, comprising:

[0005] A substrate and at least two auxiliary electrode layers and a light-emitting unit layer disposed on the same side of the substrate; wherein the light-emitting unit layer is disposed on a side of the at least two auxiliary electrode layers away from the substrate;

[0006] The at least two auxiliary electrode layers include a first auxiliary electrode layer and a second auxiliary electrode layer, and an insulating layer is disposed between the first auxiliary electrode layer and the second auxiliary electrode layer;

[0007] The first auxiliary electrode layer includes a plurality of electrode groups arranged in sequence along a first direction, each electrode group includes n first auxiliary electrodes arranged in sequence along the first direction, each first auxiliary electrode extends along a second direction, each first auxiliary electrode includes straight line segments and annular segments arranged alternately in sequence along the second direction, and adjacent straight line segments and annular segments are electrically connected; wherein the first direction and the second direction intersect each other, and n is an integer greater than or equal to 2;

[0008] The second auxiliary electrode layer comprises a plurality of second auxiliary electrodes, the second auxiliary electrodes extend along a third direction, and each second auxiliary electrode is electrically connected to two annular segments of two first auxiliary electrodes at the same position in two adjacent electrode groups; wherein the third direction intersects with the first direction;

[0009] The auxiliary electrode layer is used to transmit a driving signal to the light-emitting unit layer.

[0010] Optionally, the light-emitting unit layer includes multiple light-emitting unit groups, each of the light-emitting unit groups includes n light-emitting unit columns arranged in sequence along a first direction, each of the light-emitting unit columns includes multiple light-emitting units of the same color arranged in sequence along a second direction, and at least some of the light-emitting unit columns in each light-emitting unit group have different light-emitting colors; the vertical projection of each light-emitting unit on the substrate is located within the vertical projection of one of the ring segments on the substrate, and the ring segment is electrically connected to the first electrode of the light-emitting unit.

[0011] Optionally, the annular segment of the first auxiliary electrode is located between the straight line segments of two adjacent first auxiliary electrodes.

[0012] Optionally, the geometric center of each annular segment is located on the perpendicular midline of a straight line segment adjacent to the annular segment along the second direction;

[0013] Adjacent sides of adjacent ring segments of two adjacent first auxiliary electrodes are parallel to each other.

[0014] Optionally, the plurality of second auxiliary electrodes are parallel to each other and have the same length.

[0015] Optionally, at least part of the annular segment includes a groove, the vertical projection of the groove on the substrate overlaps with the vertical projection of a preset second auxiliary electrode on the substrate, and the groove penetrates the annular segment along the thickness direction of the annular segment; wherein the preset second auxiliary electrode is a second auxiliary electrode that is not electrically connected to the annular segment where the groove is located.

[0016] Optionally, the light emitting device further comprises:

[0017] at least n signal transmission lines, wherein the signal transmission lines include a first section, a second section, and a third section connected in sequence;

[0018] The substrate comprises a bonding area, and the bonding area is located on one side of the plurality of first auxiliary electrodes along the second direction;

[0019] The first segment and the third segment are located on both sides of the plurality of first auxiliary electrodes along a first direction, and the second segment is located on a side of the plurality of first auxiliary electrodes away from the bonding area;

[0020] One end of the first section that is not electrically connected to the second section is electrically connected to the first bonding pin of the bonding area; one end of the third section that is not electrically connected to the second section is electrically connected to the second bonding pin of the bonding area;

[0021] One end of the first auxiliary electrode away from the bonding area is electrically connected to the signal transmission line, and one end of the first auxiliary electrode adjacent to the bonding area is electrically connected to the third bonding pin of the bonding area.

[0022] Optionally, the light emitting device further comprises:

[0023] A driving circuit board, wherein the driving circuit board is bonded to the bonding area;

[0024] Part of the bonding pins electrically connected to the first auxiliary electrode and the signal transmission line are bonded to the driving circuit board.

[0025] Optionally, the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are stacked in sequence; the second electrode is arranged on a side of the first electrode away from the substrate;

[0026] The first electrode is electrically connected to the annular segment of the first auxiliary electrode;

[0027] The second auxiliary electrode layer is arranged on a side of the first auxiliary electrode layer away from the substrate, and the first electrode and the second auxiliary electrode layer are arranged in the same layer.

[0028] Optionally, the bonding area further includes a fourth bonding pin; the second electrode is electrically connected to the fourth bonding pin;

[0029] The third bonding pin, which is at a distance greater than a preset distance from the fourth bonding pin, is bonded to the driving circuit board.

[0030] Optionally, the light-emitting unit layer includes light-emitting units of three different colors, each light-emitting unit group includes three light-emitting unit columns, and the light-emitting colors of the three light-emitting unit columns are different;

[0031] The shape of the annular segment is a regular hexagonal ring, and the shape of the vertical projection of the light-emitting unit on the substrate is a regular hexagon;

[0032] The first auxiliary electrode layer and the second auxiliary electrode layer are made of the same material;

[0033] The first auxiliary electrode layer and the second auxiliary electrode layer have the same thickness.

[0034] The light-emitting device of the embodiment of the present invention includes at least two auxiliary electrode layers, and the at least two auxiliary electrode layers include a first auxiliary electrode layer and a second auxiliary electrode layer. The first auxiliary electrode layer includes a plurality of electrode groups arranged in sequence along a first direction, and each electrode group includes n first auxiliary electrodes arranged in sequence along the first direction, and each first auxiliary electrode includes straight line segments and annular segments arranged alternately in sequence along a second direction, and adjacent straight line segments and annular segments are electrically connected; the second auxiliary electrode layer includes a plurality of second auxiliary electrodes, and each second auxiliary electrode extends along a third direction, and each second auxiliary electrode is electrically connected to two annular segments of two first auxiliary electrodes at the same position in two adjacent electrode groups, so that the first auxiliary electrodes and the second auxiliary electrodes at the same position in the adjacent electrode groups are in a grid shape, so that the driving signal transmitted by the first auxiliary electrode to the light-emitting unit is more uniform, and the light-emitting brightness of the light-emitting unit is more uniform, thereby improving the light-emitting uniformity of the light-emitting device.

[0035] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 is a top view of a light emitting device provided by an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 A cross-sectional view of the light emitting device along the section line AA;

[0039] Figure 3 is a top view of the first auxiliary electrode layer and the second auxiliary electrode layer;

[0040] Figure 4 yes Figure 3 A cross-sectional view of the light emitting device along the section line BB;

[0041] Figure 5 yes Figure 3 A partial enlarged view of

[0042] Figure 6 is a top view of another light emitting device provided by an embodiment of the present invention;

[0043] Figure 7It is a cross-sectional view of another light-emitting device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] As mentioned in the background technology, the existing light-emitting devices have the problem of uneven brightness. The inventors have found through research that the reason for this problem is that the drive signal is transmitted to the light-emitting unit through the lead wire, and the lead wire will divide the drive signal. The lead voltages of different light-emitting areas are different, resulting in different drive signals actually applied to different light-emitting units, resulting in uneven brightness. In the related art, the problem of uneven brightness is improved by adding auxiliary electrodes. The auxiliary electrodes are directly electrically connected to the anode of the light-emitting unit. The anode, auxiliary electrodes and insulating layer are prepared on the glass by semiconductor photolithography technology. The insulating layer mainly plays the role of pixel limitation and insulation. However, in the related art, the problem of uneven brightness still exists after adding auxiliary electrodes.

[0047] An embodiment of the present invention provides a light emitting device, Figure 1 is a top view of a light emitting device provided by an embodiment of the present invention, Figure 2 yes Figure 1 A cross-sectional view of the light emitting device along the section line AA, Figure 3 is a top view of the first auxiliary electrode layer and the second auxiliary electrode layer, referring to Figure 1-Figure 3 , the light emitting device comprises:

[0048] A substrate 10 and at least two auxiliary electrode layers and a light-emitting unit layer disposed on the same side of the substrate 10; wherein the light-emitting unit layer is disposed on a side of the at least two auxiliary electrode layers away from the substrate 10;

[0049] At least two auxiliary electrode layers include a first auxiliary electrode layer 21 and a second auxiliary electrode layer 22 which are stacked, and an insulating layer 40 is disposed between the first auxiliary electrode layer 21 and the second auxiliary electrode layer 22;

[0050] The first auxiliary electrode layer 21 includes a plurality of electrode groups 20 sequentially arranged along the first direction X, each electrode group 20 includes n first auxiliary electrodes 210 sequentially arranged along the first direction X, each first auxiliary electrode 210 extends along the second direction Y, each first auxiliary electrode 210 includes straight line segments 211 and annular segments 212 sequentially arranged alternately along the second direction Y, and adjacent straight line segments 211 and annular segments 212 are electrically connected; wherein the first direction X and the second direction Y intersect each other, and n is an integer greater than or equal to 2;

[0051] The second auxiliary electrode layer 22 includes a plurality of second auxiliary electrodes 220, the second auxiliary electrodes 220 extending along a third direction Z, each second auxiliary electrode 220 being electrically connected to two annular segments 212 of two first auxiliary electrodes 210 at the same position in two adjacent electrode groups 20; wherein the third direction Z intersects with the first direction X;

[0052] The auxiliary electrode layer is used to transmit a driving signal to the light-emitting unit layer.

[0053] Among them, the at least two auxiliary electrode layers may be two auxiliary electrode layers or multiple auxiliary electrode layers, and the at least two auxiliary electrode layers are sequentially stacked in a direction away from the substrate 10, and an insulating layer 40 is provided between two adjacent auxiliary electrode layers. The first auxiliary electrode layer 21 and the second auxiliary electrode layer 22 are sequentially stacked in a direction away from the substrate 10. The light-emitting unit layer may include a plurality of light-emitting units 31, and the first auxiliary electrode layer 21 and the second auxiliary electrode layer 22 are used to transmit a driving signal to the light-emitting unit 31. The light-emitting unit 31 includes a first electrode 311, a light-emitting functional layer 313, and a second electrode 312, and the first auxiliary electrode layer 21 may be electrically connected to the first electrode 311 or the second electrode 312.

[0054] Each second auxiliary electrode 220 extends along a third direction Z, and the third direction Z may be in a different direction from the second direction Y, that is, the third direction Z intersects with the second direction Y. Each second auxiliary electrode 220 is electrically connected to two annular segments 212 of two first auxiliary electrodes 21 at the same position in two adjacent electrode groups 20. For example, in two adjacent electrode groups 20, one annular segment 212 of the pth first auxiliary electrode 210 of one electrode group 20 is electrically connected to one annular segment 212 of the pth first auxiliary electrode 210 of the other electrode group 20 through one second auxiliary electrode 220, where p is an integer greater than or equal to 1.

[0055] Each second auxiliary electrode 220 connects the two annular segments 212 of the two first auxiliary electrodes 21 at the same position in the adjacent electrode group 20, so that the first auxiliary electrodes 210 and the second auxiliary electrodes 220 at the same position in the adjacent electrode group 20 are connected in a grid shape, so that the driving signal transmitted by the first auxiliary electrode 210 to different light-emitting units 31 is more uniform, and the light-emitting brightness of different light-emitting units 31 is more uniform, thereby improving the light-emitting uniformity of the light-emitting device.

[0056] The light-emitting device of the embodiment of the present invention includes at least two auxiliary electrode layers, the at least two auxiliary electrode layers include a first auxiliary electrode layer 21 and a second auxiliary electrode layer 22, the first auxiliary electrode layer 21 includes a plurality of electrode groups 20 arranged in sequence along a first direction x, each electrode group 20 includes n first auxiliary electrodes 210 arranged in sequence along the first direction x, each first auxiliary electrode 210 includes a straight line segment 211 and annular segment 212 arranged alternately in sequence along a second direction y, and adjacent straight line segments 211 and annular segments 212 are electrically connected; the second auxiliary electrode layer 22 includes a plurality of second auxiliary electrodes 220, each second auxiliary electrode 220 extends along a third direction Z, and each second auxiliary electrode 220 is electrically connected to two annular segments 212 of two first auxiliary electrodes 21 at the same position in two adjacent electrode groups 20; the first auxiliary electrodes 210 and the second auxiliary electrodes 220 at the same position in the adjacent electrode groups 20 are connected in a grid shape, so that the driving signal transmitted by the first auxiliary electrode 210 to different light-emitting units 31 is more uniform, so that the light-emitting brightness of different light-emitting units 31 is more uniform, thereby improving the light-emitting uniformity of the light-emitting device.

[0057] On the basis of the above embodiment, optionally, the light-emitting unit layer includes a plurality of light-emitting unit groups 30, each light-emitting unit group 30 includes n light-emitting unit columns 310 arranged in sequence along the first direction X, each light-emitting unit column 310 includes a plurality of light-emitting units 31 of the same color arranged in sequence along the second direction Y, and at least some of the light-emitting unit columns 310 in each light-emitting unit group 30 have different light-emitting colors; the vertical projection of each light-emitting unit 31 on the substrate 10 is located within the vertical projection of a ring segment 212 on the substrate 10, and the ring segment 212 is electrically connected to the first electrode 311 of the light-emitting unit 31.

[0058] The light-emitting unit layer may include light-emitting units 31 of two or more light-emitting colors, and the light-emitting colors of n light-emitting unit columns 310 in each light-emitting unit group 30 may all be different, or the colors of some light-emitting unit columns 310 may be the same. Exemplarily, the light-emitting unit layer includes light-emitting units 31 of n different light-emitting colors, and the light-emitting colors of n light-emitting unit columns 310 in the light-emitting unit group 30 are all different. n may be 2, 3, or 4, etc.

[0059] Each light-emitting unit column 310 corresponds to a first auxiliary electrode 210, and the light-emitting units 31 in each light-emitting unit column 310 correspond to a ring segment 212 in a first auxiliary electrode 210. The vertical projection of each light-emitting unit 31 in the light-emitting unit column 310 on the substrate 10 is located within the vertical projection of a ring segment 212 in the first auxiliary electrode 210 on the substrate 10, and each light-emitting unit 31 in the light-emitting unit column 310 is electrically connected to the corresponding ring segment 212. The second auxiliary electrode 220 is used to connect the first auxiliary electrode 210 electrically connected to the light-emitting unit column 310 of the same color.

[0060] In addition, the shape of the annular segment 212 is the same as that of the light-emitting unit 31, and can be a regular polygon, so that when the perimeter of the light-emitting unit 31 is constant, the area of ​​the light-emitting unit 31 is larger. The light-emitting unit layer includes t light-emitting units 31 of different light-emitting colors, and the number of sides included in the light-emitting unit 31 can be an integer multiple of t (t is an integer greater than or equal to 2), so that when multiple light-emitting units 31 are arranged, they can be arranged more closely, the density of the light-emitting units 31 is increased, the aperture ratio of the light-emitting device is increased, and the light-emitting units 31 are arranged more uniformly. Exemplarily, when the light-emitting unit layer includes three light-emitting units 31 of different light-emitting colors, the light-emitting unit 31 and the annular segment 212 can be regular hexagons.

[0061] In this embodiment, each second auxiliary electrode 220 is connected to two annular segments 212 of two first auxiliary electrodes 21 at the same position in the adjacent electrode group 20, so that the first auxiliary electrode 210 corresponding to the light-emitting unit 31 of each luminescent color is connected to the second auxiliary electrode 220 in a grid shape, so that the driving signal transmitted by the first auxiliary electrode 210 to the light-emitting unit 31 is more uniform, and the luminous brightness of the light-emitting unit 31 is more uniform, thereby improving the luminous uniformity of the light-emitting device. In addition, the first auxiliary electrodes 210 corresponding to the light-emitting units 31 of the same luminescent color are electrically connected through the second auxiliary electrode 220, and the first auxiliary electrodes 210 corresponding to the light-emitting units 31 of different colors are insulated from each other, so that the light-emitting units 31 of different luminescent colors can be individually controlled to emit light and achieve color change.

[0062] On the basis of the above embodiment, optionally, the annular segment 212 of the first auxiliary electrode 210 is located between the straight line segments 211 of two adjacent first auxiliary electrodes 210 .

[0063] That is, the annular segments 212 of adjacent first auxiliary electrodes 210 are staggered, the annular segments 212 of adjacent first auxiliary electrodes 210 are staggered, and the light-emitting units 31 in two adjacent light-emitting unit columns 310 are staggered. This arrangement makes the arrangement of the light-emitting units 31 of different light-emitting colors in the light-emitting device more uniform, the arrangement density of the light-emitting units 31 is larger, and the aperture ratio of the light-emitting device is larger, so that the light-emitting device has a better effect when displaying color changes.

[0064] Optionally, the geometric center of each annular segment 212 is located on the perpendicular midline of the straight line segment 211 adjacent to the annular segment 212 along the first direction; and adjacent sides of adjacent annular segments 212 of two adjacent first auxiliary electrodes 210 are parallel to each other.

[0065] In this way, the annular segments 212 of two adjacent first auxiliary electrodes 210 are arranged opposite to the straight line segment 211, and the distance between the annular segments 212 can be smaller, and the arrangement between the annular segments 212 can be tighter and more uniform, thereby making the arrangement of the light-emitting units 31 tighter and more uniform, thereby improving the aperture ratio and light uniformity of the light-emitting device.

[0066] Optionally, the plurality of second auxiliary electrodes 220 are parallel to each other and have the same length.

[0067] Such an arrangement allows the second auxiliary electrodes 220 to be evenly arranged, so that after the second auxiliary electrodes 220 are electrically connected to the first auxiliary electrodes 210, the resistance of the grid-like auxiliary electrodes composed of the first auxiliary electrodes 210 and the second auxiliary electrodes 220 is evenly distributed, so that the voltage drop of the driving signal at each position is consistent, further improving the uniformity of the driving signal and improving the uniformity of the light emission of the light-emitting device.

[0068] Figure 4 yes Figure 3 A cross-sectional view of the light emitting device along the section line BB, Figure 5 yes Figure 3 A partial enlarged view of the Figure 3-Figure 5 On the basis of the above embodiment, optionally, at least part of the annular segment 212 includes a groove 50, the vertical projection of the groove 50 on the substrate 10 overlaps with the vertical projection of the preset second auxiliary electrode on the substrate 10, and the groove 50 penetrates the annular segment 212 along the thickness direction of the annular segment 212; wherein, the preset second auxiliary electrode is a second auxiliary electrode 220 that is not electrically connected to the annular segment 212 where the groove 50 is located.

[0069] in, Figure 5 yes Figure 3 FIG. 7 is an enlarged view of the first auxiliary electrode 210 in the dashed box 70. Figure 3-Figure 5 The groove 50 of the ring segment 212 overlaps with the vertical projection of the preset second auxiliary electrode on the substrate 10. By providing the groove 50, the risk of short circuit between the preset second auxiliary electrode 220 and the first auxiliary electrode 210 can be reduced, thereby improving the reliability of the light-emitting device.

[0070] Figure 6 is a top view of another light emitting device provided by an embodiment of the present invention. Figure 6 Optionally, the light emitting device further comprises:

[0071] At least n signal transmission lines 80, the signal transmission line 80 includes a first section 81, a second section 82 and a third section 83 connected in sequence;

[0072] The substrate 10 includes a bonding region 100 , and the bonding region 100 is located on one side of the plurality of first auxiliary electrodes 210 along the second direction Y;

[0073] The first segment 81 and the third segment 83 are located on both sides of the plurality of first auxiliary electrodes 210 along the first direction X, and the second segment 82 is located on a side of the plurality of first auxiliary electrodes 210 away from the bonding area 100;

[0074] One end of the first section 81 that is not electrically connected to the second section 82 is electrically connected to the first bonding pin 101 of the bonding area 100; one end of the third section 83 that is not electrically connected to the second section 82 is electrically connected to the second bonding pin 102 of the bonding area 100;

[0075] One end of the first auxiliary electrode 210 away from the bonding region 100 is electrically connected to the signal transmission line 80 , and one end of the first auxiliary electrode 210 adjacent to the bonding region 100 is electrically connected to the third bonding pin 103 of the bonding region 100 .

[0076] Specifically, the signal transmission line 80 is used to be electrically connected to the driving circuit board, receive the driving signal output by the driving circuit board, and transmit the driving signal to the light-emitting unit 31 through the first auxiliary electrode 210. The signal transmission line 80 is U-shaped and is arranged half around the plurality of first auxiliary electrodes 210. By arranging the end of the first auxiliary electrode 210 away from the bonding area 100 to be electrically connected to the signal transmission line 80, and the end of the first auxiliary electrode 210 adjacent to the bonding area 100 to be electrically connected to the third bonding pin 103 of the bonding area 100, both ends of the first auxiliary electrode 210 can have a driving signal input, so that the path through which the driving signal transmitted to each annular segment 212 passes is shorter, the voltage drop of the driving signal is smaller, the driving signal transmitted to each annular segment 212 is close, and the luminous brightness of the light-emitting unit 31 is close, which further improves the luminous uniformity of the light-emitting device. In addition, the two ends of the signal transmission line 80 are electrically connected to the first bonding pin 101 and the second bonding pin 102 respectively, which can improve the injection efficiency of the driving signal and reduce the voltage drop of the driving signal on the signal transmission line 80, further improve the uniformity of the driving signal, and further improve the luminous uniformity of the light-emitting device.

[0077] Based on the above embodiment, optionally, the light emitting device further includes:

[0078] A driving circuit board, the driving circuit board is bonded in bonding area 100;

[0079] Part of the bonding pins electrically connected to the first auxiliary electrode 210 and the signal transmission line 80 are bonded to the driving circuit board.

[0080] Specifically, by setting some bonding pins to be electrically connected to the driving circuit board so that only some bonding pins receive the driving signal transmitted by the driving circuit board, the luminous brightness of some light-emitting units 31 can be adjusted to improve the luminous uniformity of the light-emitting device. Exemplarily, if the luminous unit 31 connected to the annular segment 212 of a first auxiliary electrode 210 and the luminous unit 31 closer to the bonding area 100 has a higher brightness, the third bonding pin 103 connected to the first auxiliary electrode 210 can be set not to be bonded to the driving circuit board, thereby reducing the brightness of the luminous unit 31 closer to the bonding area 100 and improving the luminous uniformity of the light-emitting device.

[0081] Figure 7 is a cross-sectional view of another light emitting device provided by an embodiment of the present invention. Figure 6 and Figure 7 Optionally, the light-emitting unit 31 includes a first electrode 311, a light-emitting functional layer 313, and a second electrode 312 which are sequentially stacked; the second electrode 312 is arranged on a side of the first electrode 311 away from the substrate 10;

[0082] The first electrode 311 is electrically connected to the annular segment 212 of the first auxiliary electrode 210;

[0083] The second auxiliary electrode layer 220 is disposed on a side of the first auxiliary electrode layer 210 away from the substrate 10 , and the first electrode 311 is disposed on the same layer as the second auxiliary electrode layer 220 .

[0084] Among them, one of the first electrode 311 and the second electrode 312 is an anode and the other is a cathode. The first electrode 311 can be a light-transmitting electrode, and the second electrode 312 can be a reflective electrode. The light emitted by the light-emitting unit 31 is emitted through the opening in the annular segment 212. By arranging the second auxiliary electrode layer 220 and the first electrode 311 in the same layer, the light-emitting device has a thinner thickness.

[0085] In addition, reference Figure 2 The first electrode 311 and the second auxiliary electrode 220 may also be in a different layer.

[0086] Based on the above embodiment, optionally, the bonding area 100 further includes a fourth bonding pin 104; the second electrode 312 is electrically connected to the fourth bonding pin 104;

[0087] The third bonding pin 103 , which is at a distance greater than a preset distance from the fourth bonding pin 104 , is bonded to the driving circuit board.

[0088] Among them, the fourth bonding pin 104 is used to transmit a signal to the second electrode 312, and the brightness of the light-emitting unit 31 in the area closer to the fourth bonding pin 104 is brighter. The third bonding pin 103 whose distance from the fourth bonding pin 104 is greater than a preset distance is set to be bonded to the driving circuit board, that is, the third bonding pin 103 whose distance from the fourth bonding pin 104 is less than or equal to the preset distance is not bonded to the driving circuit board, which can reduce the brightness of the light-emitting unit 31 closer to the fourth bonding pin 104 and further improve the uniformity of the light emission of the light-emitting device.

[0089] Based on the above embodiment, optionally, refer to Figure 1 , the light-emitting unit layer includes light-emitting units of three different colors, each light-emitting unit group 30 includes three light-emitting unit columns 310, and the light-emitting colors of the three light-emitting unit columns 310 are different;

[0090] The shape of the annular segment 212 is a regular hexagonal ring, and the shape of the vertical projection of the light emitting unit 31 on the substrate 10 is a regular hexagon.

[0091] This arrangement allows the multiple light-emitting units 31 to be arranged more closely, thereby increasing the density of the light-emitting units 31 , increasing the aperture ratio of the light-emitting device, and making the light-emitting units 31 arranged more uniformly.

[0092] Specifically, the second electrode 312 of the plurality of light-emitting units 31 may be a whole electrode, and the second electrode 312 is connected to a fixed potential. By applying a driving signal to the first electrode 311, the light-emitting unit 31 may be controlled to emit light, for example, the light-emitting unit 31 may breathe, turn on and off, and switch between different light-emitting colors.

[0093] Based on the above embodiment, optionally, the first auxiliary electrode layer 21 and the second auxiliary electrode layer 22 are made of the same material;

[0094] The first auxiliary electrode layer 21 and the second auxiliary electrode layer 22 have the same thickness.

[0095] In this way, the first auxiliary electrode layer 21 and the second auxiliary electrode layer 22 are prepared by the same process, thereby reducing the process cost.

[0096] Specifically, the first auxiliary electrode layer 21 can adopt an AlMo structure with a thickness of Al250nm-750nm, Mo35nm-105nm, and be patterned by etching to form a first auxiliary electrode 210 having a ring segment 212 and a straight segment 211. The insulating layer 40 is arranged between the first auxiliary electrode layer 21 and the second auxiliary electrode layer 22, and the insulating layer 40 includes a via hole, the first auxiliary electrode 210 and the second auxiliary electrode 220 are electrically connected through the via hole, and the ring segment 212 and the first auxiliary electrode 210 are electrically connected through the via hole. The insulating layer 40 can adopt silicon oxide or photosensitive polyimide (PSPI) photoresist. The second auxiliary electrode layer 22 can adopt an AlMo structure with a thickness of Al250nm-750nm, Mo35nm-105nm, and be patterned by etching. The first electrode layer 311 can adopt ITO.

[0097] A second insulating layer 90 is further disposed on the side of the second auxiliary electrode 220 away from the substrate 20. The second insulating layer 90 is a pixel defining layer for defining the position of the light emitting unit 31 and covers the second auxiliary electrode 220. The second insulating layer 90 may be made of silicon oxide or PSPI photoresist.

[0098] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0099] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A light emitting device, characterized in that: include: A substrate and at least two auxiliary electrode layers and a light-emitting unit layer disposed on the same side of the substrate; wherein the light-emitting unit layer is disposed on a side of the at least two auxiliary electrode layers away from the substrate; The at least two auxiliary electrode layers include a first auxiliary electrode layer and a second auxiliary electrode layer which are stacked, and an insulating layer is disposed between the first auxiliary electrode layer and the second auxiliary electrode layer; The first auxiliary electrode layer includes a plurality of electrode groups arranged in sequence along a first direction, each electrode group includes n first auxiliary electrodes arranged in sequence along the first direction, each first auxiliary electrode extends along a second direction, each first auxiliary electrode includes straight line segments and annular segments arranged alternately in sequence along the second direction, and adjacent straight line segments and annular segments are electrically connected; wherein the first direction and the second direction intersect each other, and n is an integer greater than or equal to 2; The second auxiliary electrode layer comprises a plurality of second auxiliary electrodes, the second auxiliary electrodes extend along a third direction, and each second auxiliary electrode is electrically connected to two annular segments of two first auxiliary electrodes at the same position in two adjacent electrode groups; wherein the third direction intersects with the first direction; The auxiliary electrode layer is used to transmit a driving signal to the light-emitting unit layer.

2. The light emitting device according to claim 1, characterized in that: The light-emitting unit layer includes a plurality of light-emitting unit groups, each of the light-emitting unit groups includes n light-emitting unit columns arranged in sequence along a first direction, each of the light-emitting unit columns includes a plurality of light-emitting units of the same color arranged in sequence along a second direction, and at least some of the light-emitting unit columns in each light-emitting unit group have different light-emitting colors; a vertical projection of each light-emitting unit on the substrate is located within a vertical projection of one of the annular segments on the substrate, and the annular segment is electrically connected to the first electrode of the light-emitting unit.

3. The light emitting device according to claim 1, characterized in that: The annular segment of the first auxiliary electrode is located between the straight line segments of two adjacent first auxiliary electrodes.

4. The light emitting device according to claim 1, characterized in that: The geometric center of each annular segment is located on the perpendicular bisector of the straight line segment adjacent to the annular segment along the second direction; Adjacent sides of adjacent ring segments of two adjacent first auxiliary electrodes are parallel to each other.

5. The light emitting device according to claim 1, characterized in that: The plurality of second auxiliary electrodes are parallel to each other and have the same length.

6. The light emitting device according to claim 1, characterized in that: At least part of the annular segment includes a groove, the vertical projection of the groove on the substrate overlaps with the vertical projection of a preset second auxiliary electrode on the substrate, and the groove penetrates the annular segment along the thickness direction of the annular segment; wherein the preset second auxiliary electrode is a second auxiliary electrode that is not electrically connected to the annular segment where the groove is located.

7. The light emitting device according to claim 1, characterized in that: Also includes: at least n signal transmission lines, wherein the signal transmission lines include a first section, a second section, and a third section connected in sequence; The substrate comprises a bonding area, and the bonding area is located on one side of the plurality of first auxiliary electrodes along the second direction; The first segment and the third segment are located on both sides of the plurality of first auxiliary electrodes along a first direction, and the second segment is located on a side of the plurality of first auxiliary electrodes away from the bonding area; One end of the first section that is not electrically connected to the second section is electrically connected to the first bonding pin of the bonding area; one end of the third section that is not electrically connected to the second section is electrically connected to the second bonding pin of the bonding area; One end of the first auxiliary electrode away from the bonding area is electrically connected to the signal transmission line, and one end of the first auxiliary electrode adjacent to the bonding area is electrically connected to the third bonding pin of the bonding area; The light emitting device further comprises: A driving circuit board, wherein the driving circuit board is bonded to the bonding area; Part of the bonding pins electrically connected to the first auxiliary electrode and the signal transmission line are bonded to the driving circuit board.

8. The light emitting device according to claim 1 or 7, characterized in that: The light-emitting unit comprises a first electrode, a light-emitting functional layer and a second electrode which are stacked in sequence; the second electrode is arranged on a side of the first electrode away from the substrate; The first electrode is electrically connected to the annular segment of the first auxiliary electrode; The second auxiliary electrode layer is arranged on a side of the first auxiliary electrode layer away from the substrate, and the first electrode and the second auxiliary electrode layer are arranged on the same layer.

9. The light emitting device according to claim 8, characterized in that: The bonding area further includes a fourth bonding pin; the second electrode is electrically connected to the fourth bonding pin; The third bonding pin, which is at a distance greater than a preset distance from the fourth bonding pin, is bonded to the driving circuit board.

10. The light emitting device according to claim 1, characterized in that: The light-emitting unit layer includes light-emitting units of three different colors, each light-emitting unit group includes three light-emitting unit columns, and the light-emitting colors of the three light-emitting unit columns are different; The shape of the annular segment is a regular hexagonal ring, and the shape of the vertical projection of the light-emitting unit on the substrate is a regular hexagon; The first auxiliary electrode layer and the second auxiliary electrode layer are made of the same material; The first auxiliary electrode layer and the second auxiliary electrode layer have the same thickness.

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