Display panel and display device

Abstract

An embodiment of the present invention provides a display panel and a display device. The display panel includes a first substrate and a second substrate stacked thereon; the first substrate includes a first substrate and a light-emitting device, and the light-emitting device is located on a side of the first substrate close to the second substrate, and a side of the first substrate away from the second substrate is a display surface of the display panel; the first substrate includes a connection plate, and the connection plate is located on a side of the first substrate close to the second substrate; the second substrate includes an opposing plate and a bonding plate, the opposing plate is located on a side of the second substrate close to the first substrate, and the bonding plate is located on a side of the second substrate away from the first substrate; the opposing plate and the connection plate are electrically connected correspondingly, and at least a part of the opposing plate is electrically connected to the bonding plate through a via hole penetrating the second substrate. The present invention can narrow the border to achieve a borderless design.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and in particular, to a display panel and a display device. Background Art

[0002] With the proposal of concepts such as full-screen and borderless, display products have higher and higher requirements for narrow borders. In fact, drive circuits, drive chips and other structures need to be arranged in the border area of the display panel, and it is impossible to further compress the border space, which limits the narrowing of the border of the display panel. Summary of the Invention

[0003] Embodiments of the present invention provide a display panel and a display device to solve the technical problem of limited narrow borders in the prior art.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, which includes a first substrate and a second substrate stacked on each other;

[0005] The first substrate includes a first substrate body and a light-emitting device. The light-emitting device is located on a side of the first substrate body close to the second substrate, and a side of the first substrate away from the second substrate is a display surface of the display panel; the first substrate includes a connection board located on a side of the first substrate close to the second substrate;

[0006] The second substrate includes a counter board and a bonding board. The counter board is located on a side of the second substrate close to the first substrate, and the bonding board is located on a side of the second substrate away from the first substrate; wherein, the counter board and the connection board are electrically connected correspondingly, and at least part of the counter board is electrically connected to the bonding board through a via hole penetrating through the second substrate.

[0007] In a second aspect, based on the same inventive concept, an embodiment of the present invention further provides a display device, which includes the display panel provided in any embodiment of the present invention.

[0008] The display panel and the display device provided by the embodiments of the present invention have the following beneficial effects: The display panel is provided to include a first substrate and a second substrate which are stacked. A light-emitting device and a connection board are arranged on the first substrate. The side of the first substrate away from the second substrate is the display surface of the display panel. An opposing board is arranged on the second substrate. The connection board and the opposing board are correspondingly electrically connected to realize the transmission of electrical signals between the first substrate and the second substrate. A bonding board on the second substrate is electrically connected to the opposing board through a via hole penetrating the second substrate. In the embodiments of the present invention, by connecting the bonding board and the opposing board through a via hole and correspondingly electrically connecting the opposing board and the connection board, a signal transmission path from the second substrate to the first substrate is realized. And since a light-emitting device is arranged on the first substrate and the light for display emitted by the light-emitting device towards the display surface does not pass through the second substrate, the via hole penetrating the second substrate will not affect the size of the border of the display panel, which is beneficial to narrowing the border to achieve a borderless design. In addition, the second substrate has a certain supporting strength. In the bonding and pressing process of bonding the display driving structure, the second substrate can play a supporting role to protect the circuits in the first substrate and prevent damage to the circuits caused by the pressure in the pressing process. The design of the embodiments of the present invention has a high bonding yield and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 It is a schematic diagram of a related technology;

[0011] Figure 2 It is a schematic diagram of a display panel provided by an embodiment of the present invention;

[0012] Figure 3 It is another schematic diagram of a display panel provided by an embodiment of the present invention;

[0013] Figure 4 It is another schematic diagram of a display panel provided by an embodiment of the present invention;

[0014] Figure 5 It is another schematic diagram of a display panel provided by an embodiment of the present invention;

[0015] Figure 6 It is another schematic diagram of a display panel provided by an embodiment of the present invention;

[0016] Figure 7 It is another schematic diagram of a display panel provided by an embodiment of the present invention;

[0017] Figure 8 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0018] Figure 9 is Figure 8 a schematic cross-sectional view at the position of the median tangent A-A';

[0019] Figure 10 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0020] Figure 11 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0021] Figure 12 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0022] Figure 13 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0023] Figure 14 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0024] Figure 15 Another schematic diagram of a display panel provided by an embodiment of the present invention;

[0025] Figure 16 A schematic diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0028] Figure 1 A schematic diagram of a related art, as Figure 1As shown in the figure, the display panel includes a glass substrate 01, a driving layer 02, and a light-emitting device 03 located above the driving layer 02. A hole is drilled in the glass substrate 01, and the electrical signal on one side of the driving layer 02 is guided to the side of the glass substrate 01 facing away from the driving layer 02 through the via hole 04 on the glass substrate 01. In this way, the display driving chip 05 can be bonded to the back of the glass substrate 01, and the bonded display driving chip 05 on the back has no impact on the border of the display panel, thereby achieving the purpose of narrowing the border. However, in the existing process, due to the large thickness of the glass substrate, the diameter of the via hole 04 is large, and the via hole 04 still occupies a certain area of the border region, which is not conducive to realizing the borderless design.

[0029] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a display panel, which includes a first substrate and a second substrate stacked. A light-emitting device is arranged on the first substrate, and a bonding plate capable of bonding a display driving structure is arranged on the second substrate. It is designed to lead the electrical signal provided by the display driving structure to the first substrate through the second substrate to drive the light-emitting device. A connecting plate and an opposing plate are respectively arranged on the first substrate and the second substrate to achieve electrical connection. The bonding plate on the second substrate is connected to the opposing plate through a via hole penetrating the second substrate, and the display surface of the display panel is arranged on the side of the first substrate away from the second substrate. Then, the via hole on the second substrate does not occupy the space of the border region of the display panel, achieving the purpose of narrowing the border and being conducive to realizing the borderless design.

[0030] Figure 2 A schematic diagram of a display panel provided by an embodiment of the present invention is as Figure 2 shown. The display panel includes a stacked first substrate 10 and a second substrate 20. Among them,

[0031] The first substrate 10 includes a first substrate 11 and a light-emitting device 12. The light-emitting device 12 is located on the side of the first substrate 11 close to the second substrate 20. The first substrate 10 includes a connecting plate 13, and the connecting plate 13 is located on the side of the first substrate 10 close to the second substrate 20. The first substrate 11 can be a flexible substrate or a rigid substrate. In one embodiment, the first substrate 11 is a glass substrate. The side of the first substrate 10 away from the second substrate 20 is the display surface of the display panel, and the display surface is the front of the display panel. An image screen is displayed on the front of the display panel, that is, the light emitted by the light-emitting device 12 exits from the side of the first substrate 10 facing away from the second substrate 20. Figure 2The light-emitting direction of the light-emitting device 12 is indicated by an arrow. Correspondingly, it can be understood that the second substrate 20 is located on the back of the display surface of the display panel. The light-emitting device 12 is a light-emitting diode (LED), such as a Micro-LED or a Mini-LED. The light-emitting device 12 may include devices of three colors: red, green, and blue. The area formed by arranging a plurality of light-emitting devices 12 is the display area of the display panel.

[0032] The second substrate 20 includes an opposed plate 22 and a bonding plate 23. The opposed plate 22 is located on the side of the second substrate 20 close to the first substrate 10, and the bonding plate 23 is located on the side of the second substrate 20 far from the first substrate 10; the second substrate 20 includes a second substrate 21, that is, the opposed plate 22 and the bonding plate 23 are respectively located on both sides of the second substrate 21, and the second substrate 21 may be a flexible substrate or a rigid substrate.

[0033] Among them, at least part of the opposed plate 22 is electrically connected to the bonding plate 23 through a via V penetrating the second substrate 20. The opposed plate 22 and the connection plate 13 are correspondingly electrically connected to realize the transmission of electrical signals between the first substrate 10 and the second substrate 20. The opposed plate 22 and the connection plate 13 may be the same or different, and the number of opposed plates 22 is greater than or equal to the number of bonding plates 23. The bonding plate 23 can be used to bond the display driving structure. In a manufacturing method, the first substrate 10 and the second substrate 20 are respectively manufactured, and then the two are aligned and bonded. In the alignment and bonding process, the opposed plate 22 and the connection plate 13 are correspondingly bonded and connected.

[0034] The display panel provided by the embodiment of the present invention includes a first substrate 10 and a second substrate 20 stacked. A light-emitting device 12 and a connection plate 13 are provided on the first substrate 10. The side of the first substrate 10 far from the second substrate 20 is the display surface of the display panel. An opposed plate 22 is provided on the second substrate 20. The connection plate 13 and the opposed plate 22 are correspondingly electrically connected to realize the transmission of electrical signals between the first substrate 10 and the second substrate 20. A bonding plate 23 is also provided on the second substrate 20. The bonding plate 23 is provided on the back of the display panel. The bonding plate 23 is electrically connected to the opposed plate 22 through a via V penetrating the second substrate 20. The bonding plate 23 can be used to bond the display driving structure. The embodiment of the present invention utilizes the connection between the bonding plate 23 and the opposed plate 22 through the via V and the corresponding electrical connection between the opposed plate 22 and the connection plate 13 to realize the signal transmission path from the second substrate 20 to the first substrate 10. And because the light-emitting device 12 is provided on the first substrate 10 and the light for display emitted by the light-emitting device 12 towards the display surface does not pass through the second substrate 20, the via V penetrating the second substrate 20 will not affect the size of the border of the display panel, which is beneficial to narrowing the border to achieve a borderless design.

[0035] In addition, the bonding plate 23 is disposed on the side of the second substrate 20 away from the first substrate 10. After the first substrate 10 and the second substrate 20 are correspondingly bonded, the display driving structure can be bonded by using the bonding plate 23, and the display driving structure will not affect the flatness of the corresponding bonding of the first substrate 10 and the second substrate 20. Moreover, the second substrate 20 has a certain supporting strength. In the bonding and pressing process of bonding the display driving structure, the second substrate 20 can play a supporting role to protect the circuits in the first substrate 10 and prevent the circuits from being damaged by the pressure in the pressing process. The design of the embodiment of the present invention has a high bonding yield and is easy to implement.

[0036] In some embodiments, Figure 3 Another schematic diagram of a display panel provided by an embodiment of the present invention is shown in Figure 3 As shown, the surface of the light-emitting device 12 close to the first substrate 11 is the light-emitting surface; the light-emitting device 12 includes a first electrode 121 and a second electrode 122, and both the first electrode 121 and the second electrode 122 are disposed on the side of the light-emitting device 12 away from the first substrate 11. One of the first electrode 121 and the second electrode 122 is an anode and the other is a cathode. The light emitted from the light-emitting surface of the light-emitting device 12 is incident on the first substrate 11 and then emitted from the display panel. The first electrode 121 and the second electrode 122 will not block the light emission of the light-emitting device 12, and can improve the light-emitting efficiency of the light-emitting device 12.

[0037] In some embodiments, as shown in Figure 3 the first substrate 10 includes a pixel circuit 14 and a first power supply structure 15 on the same side as the light-emitting device 12 and the first substrate 11. Figure 3Only one transistor in the pixel circuit 14 is schematically shown. The pixel circuit 14 can be any one in the prior art. The light-emitting device 12 is electrically connected to the pixel circuit 14, and the pixel circuit 14 is used to drive the light-emitting device 12 to emit light. The first substrate 10 further includes a first insulating layer 16, a first jumper 17, and a second jumper 18. The first insulating layer 16 covers the pixel circuit 14, the light-emitting device 12, and the first power supply structure 15 on a side of the light-emitting device 12 away from the first substrate 11. The first jumper 17 and the second jumper 18 are located on a side of the first insulating layer 16 away from the first substrate 11. One end of the first jumper 17 is electrically connected to the first electrode 121 through a first via V1 penetrating the first insulating layer 16, and the other end of the first jumper 17 is electrically connected to the pixel circuit 14 through a second via V2 penetrating the first insulating layer 16. One end of the second jumper 18 is electrically connected to the second electrode 122 through a third via V3 penetrating the first insulating layer 16, and the other end of the second jumper 18 is electrically connected to the first power supply structure 15 through a fourth via V4 penetrating the first insulating layer 16. Optionally, the first electrode 121 is an anode, the second electrode 122 is a cathode, the pixel circuit 14 is electrically connected to the anode of the light-emitting device 12, and the first power supply structure 15 provides a negative power supply voltage. Optionally, the first insulating layer 16 includes an organic material, so that the first insulating layer 16 can play a planarizing role.

[0038] In this embodiment, both the pixel circuit 14 and the light-emitting device 12 are disposed on the first substrate 10. During manufacturing, first, the pixel circuit 14 and the first power supply structure 15 are fabricated on the first substrate 11, then the light-emitting device 12 is transferred to a corresponding position on the first substrate 10, and then the first insulating layer 16 and the via-making process are fabricated, and then the first jumper 17 and the second jumper 18 are fabricated to achieve electrical connection between the light-emitting device 12, the pixel circuit 14, and the first power supply structure 15. Each light-emitting device 12 needs to be driven by its corresponding pixel circuit 14. Therefore, the pixel circuit 14 will occupy a large area on the substrate. By disposing the pixel circuit 14 for driving the light-emitting device 12 on the first substrate 10, the positions of the counter electrode plate 22, the via V, and some wirings disposed on the second substrate 20 are not restricted. For example, the counter electrode plate 22 and the via V can be disposed at positions relatively closer to the middle of the second substrate 20, which can further reduce the occupation of the display panel border and is beneficial to narrowing the border to achieve a borderless design.

[0039] In some embodiments, a second power supply structure is further disposed on the first substrate 10. The power input end of the pixel circuit 14 is electrically connected to the second power supply structure, and the second power supply structure provides a positive power supply voltage, and the first power supply structure 15 provides a negative power supply voltage.

[0040] In some embodiments, Figure 4 is a schematic diagram of another display panel provided by an embodiment of the present invention.Figure 4 Schematically shows an exploded view of a display panel, showing a top view schematic of a first substrate 10 and a top view schematic of a second substrate 20. As Figure 4 shown, the first substrate 10 includes a constant voltage structure 19 on the same side of the first substrate 11 as the light-emitting device 12, and the constant voltage structure 19 transmits a constant voltage signal; the connection board 13 includes a first connection board 13-1, and the constant voltage structure 19 is electrically connected to the first connection board 13-1; both ends of the first substrate 10 in the first direction a are provided with the first connection board 13-1, the first direction a is parallel to the plane where the first substrate 11 is located, data lines and gate lines with intersecting extending directions are provided in the first substrate 10, and the first direction a is the same as the extending direction of the data line or the gate line. The constant voltage structure 19 transmits a constant voltage signal, and the constant voltage structure 19 includes any one of a reset signal line, a positive power supply line, and a negative power supply line. The reset signal line provides a reset signal, the positive power supply line provides a positive power supply voltage, and the negative power supply line provides a negative power supply voltage. In the embodiments of the present invention, the size and number of the first connection board 13-1 are not limited. One first connection board 13-1 can be provided at one end in the first direction a or multiple first connection boards 13-1 arranged in the same direction can be provided. As Figure 4 shown, the counter plate 22 in the second substrate 20 includes a first counter plate 22-1, and the first counter plate 22-1 is correspondingly electrically connected to the first connection board 13-1. In the embodiments of the present invention, the size and number of the first counter plate 22-1 are not limited, and the number and size of the first counter plate 22-1 can be set in cooperation with the first connection board 13-1. In this embodiment, both ends along the first direction a can be the upper and lower ends or the left and right ends when the display panel is in use. Both ends along the first direction a are provided with the first connection board 13-1, and signals are provided to the first connection board 13-1 through the corresponding first counter plate 22-1, and then the constant voltage signal is provided to the constant voltage structure 19 through the first connection board 13-1. Such a setting can reduce the voltage drop of transmitting the constant voltage signal, improve the uniformity of the in-plane constant voltage signal, and further improve the display uniformity.

[0041] Figure 4 In, the display area AA and the non-display area NA of the display panel are schematically shown on the first substrate 10. Optionally, the constant voltage structure 19 is located in the display area AA, and the first connection board 13-1 is located in the non-display area NA. Figure 4 In, the constant voltage structure 19 is also only schematically shown and is not a limitation to the present invention.

[0042] In some embodiments, such as Figure 4As shown, the constant voltage structure 19 includes a plurality of traces extending along the first direction a, and each trace in the constant voltage structure 19 is connected to the first connection plate 13-1. In another connection manner, it can be that each trace in the constant voltage structure 19 is connected to a constant voltage bus, and the constant voltage bus is electrically connected to the first connection plate 13-1, which is not shown in the drawings here.

[0043] In one embodiment, Figure 4 the constant voltage structure 19 in it is a positive power supply line, the positive power supply line provides a positive power supply voltage, and the power input end of the pixel circuit 14 is electrically connected to the positive power supply line. Relative to the first power supply structure 15, the positive power supply line can also be referred to as the second power supply structure.

[0044] In addition, Figure 4 in the embodiment, only the first counter plate 22-1 corresponding to the first connection plate 13-1 is shown in the second substrate 20, and the position of the via V is not shown.

[0045] In some embodiments, Figure 5 it is another schematic diagram of a display panel provided by an embodiment of the present invention. Figure 5 A second substrate 20 is schematically shown, and a first counter plate 22-1 is respectively arranged at both ends in the first direction a for illustration. As Figure 5 shown, the first counter plates 22-1 arranged at both ends of the second substrate 20 in the first direction a are electrically connected through the first connection line 24, and one of the first counter plates 22-1 at one end position is electrically connected to the bonding plate 23 through the via V. Such a setting can reduce the number of vias V provided on the second substrate 20.

[0046] In some other embodiments, vias V are provided for both of the first counter plates 22-1 arranged at both ends of the second substrate 20 in the first direction a, which is not shown in the drawings here.

[0047] In some embodiments, Figure 6 it is another schematic diagram of a display panel provided by an embodiment of the present invention. Figure 6 A first substrate 10 is schematically shown, as Figure 6As shown, data lines 31 extending along a first direction a are provided on a first substrate 10. A constant voltage structure 19 includes a reset signal line 32 which extends along a second direction b, and the second direction b intersects the first direction a. A first connecting plate 13-1 includes a first sub-connecting plate 13-1a connected to the reset signal line 32, and first sub-connecting plates 13-1a are provided at both ends of the first substrate 10 in the first direction a. The first substrate 10 further includes at least one reset bus 33. One end of the reset bus 33 is connected to the first sub-connecting plate 13-1a at one end of the first substrate 10 in the first direction a, and the other end of the reset bus 33 is connected to the first sub-connecting plate 13-1a at the other end of the first substrate 10 in the first direction a; the reset bus 33 is electrically connected to a plurality of reset signal lines 32. Figure 6 It is shown that two reset buses 33 are provided on the first substrate 10, and both ends of the reset signal line 32 are respectively connected to one reset bus 33. In this embodiment, the signal ends of the reset signal lines 32 are led to both ends in the first direction a by using the reset buses 33, and are electrically connected to the second substrate 20 by using the first sub-connecting plates 13-1a provided at both ends. Such an arrangement can reduce the voltage drop of the transmitted reset signal, improve the uniformity of the in-plane reset signal, and further improve the display uniformity. In addition, it can also save the space at both ends of the display panel in the second direction b. For example, connection plates for connecting other circuit structures (such as a shift driving circuit) can be provided at both ends in the second direction b, and the connection plates are dispersedly arranged on the four peripheral frames of the display area, which is also more conducive to narrowing the frame.

[0048] In the embodiments of the present invention, the pixel circuit can be any one in the prior art. In some embodiments, the pixel circuit includes a driving transistor and a data writing transistor, and the output end of the data writing transistor is electrically connected to the gate of the driving transistor. At least a gate line connected to the gate of the data writing transistor and a data line connected to the input end of the data writing transistor are provided in the first substrate 10. In other embodiments, the pixel circuit includes a driving transistor, a data writing transistor, a threshold compensation transistor, a gate reset transistor, a light emission control transistor, and an electrode reset transistor. The gates of the data writing transistor and the threshold compensation transistor are connected to a first scan line, the gates of the gate reset transistor and the electrode reset transistor are connected to a second scan line, the gate of the light emission control transistor is connected to a light emission control line, and a data line and a gate line are provided in the first substrate 10. The gate line at least includes a first scan line, a second scan line, and a light emission control line.

[0049] In some embodiments, the connecting plate 13 at least includes a data connecting plate connected to the data line. Figure 7 It is a schematic diagram of another display panel provided by the embodiments of the present invention. Figure 7Schematically shows an exploded view of a display panel, showing a top view schematic of the first substrate 10 and a top view schematic of the second substrate 20. As Figure 7 shown, the first substrate 10 includes a plurality of data lines 31 extending in the column direction y, and the plurality of data lines 31 are arranged in the row direction x, and the row direction x and the column direction y intersect. The connection board 13 includes a data connection board 13-d, and one end of the data line 31 is electrically connected to the data connection board 13-d. The counter board 22 on the second substrate 20 includes a data counter board 22-d, and the data counter board 22-d is electrically connected to the data connection board 13-d one by one, and the data counter board 22-d is also electrically connected to a bonding board ( Figure 7 (not shown) through a via hole penetrating the second substrate 20. In this embodiment, the data line 31 is arranged to lead signals to the second substrate 20 through the data connection board 13-d and the data counter board 22-d, and no line structures such as fan-out lines connected to the data line 31 need to be provided on the first substrate 10, which can save the space of the non-display area and is beneficial to narrowing the border to achieve a borderless design.

[0050] Figure 7 When the embodiments are combined and applied, the first direction a and the column direction y are in the same direction, and the second direction b and the row direction x are in the same direction. Figure 6 In some other embodiments,

[0051] Another schematic diagram of a display panel provided by an embodiment of the present invention. Figure 8 Schematically shows an exploded view of a display panel, showing a top view schematic of the first substrate 10 and a top view schematic of the second substrate 20. As Figure 8 shown, the first substrate 10 includes a plurality of gate lines 34; a pixel circuit ( Figure 8 (not shown) provided on the first substrate 10 is electrically connected to the gate lines 34. The connection board 13 includes a second connection board 13-2, and at least one end of the gate line 34 is electrically connected to the second connection board 13-2; the counter board 22 includes a second counter board 22-2, and the second counter board 22-2 is electrically connected to the second connection board 13-2 correspondingly; the second substrate 20 includes a shift driving circuit 40, and the shift driving circuit 40 includes a plurality of cascaded shift registers 41, and the output end of the shift register 41 is electrically connected to the second counter board 22-2. The shift register 41 can be any structure in the prior art that can implement the signal shift function. Figure 8 In this embodiment, the gate line 34 is arranged to lead signals to the second substrate 20 through the second connection board 13-2 and the second counter board 22-2, and no line structures such as fan-out lines connected to the gate line 34 need to be provided on the first substrate 10, which can save the space of the non-display area and is beneficial to narrowing the border to achieve a borderless design. Figure 8A block diagram is used for illustration in this case. In this embodiment, the shift driving circuit 40 is disposed on the second substrate 20. The shift register 41 provides a strobe signal to the corresponding strobe line 34 through the correspondingly connected second counter electrode plate 22-2 and the second connection plate 13-2, which can further save the wiring space on the first substrate 10. Compared with the prior art solution of disposing the shift driving circuit in the border area of the display panel, in the embodiment of the present invention, the light emitted from the light emitting device 12 on the first substrate 10 towards the display surface does not pass through the second substrate 20. Disposing the shift driving circuit 40 on the second substrate 20 and not occupying the border space can greatly reduce the left and right borders of the display panel.

[0052] As Figure 8 shown, the strobe lines 34 extend along the third direction c, and multiple strobe lines 34 are arranged along the fourth direction d. The third direction c intersects with the fourth direction d; at at least one end of the first substrate 10 in the third direction c, multiple second connection plates 13-2 are arranged along the fourth direction d. Figure 8 It is schemed in this case that both ends of the strobe line 34 are respectively connected to a second connection plate 13-2, and correspondingly, second counter electrode plates 22-2 are respectively disposed at the left and right ends of the second substrate 20 in the third direction c. Such a setting enables the signal on the strobe line 34 on the first substrate 10 to be transmitted from both ends to the middle, which can reduce the voltage drop difference at different positions of the strobe line 34, thereby improving the brightness uniformity of the light emitting devices driven by multiple pixel circuits connected to the strobe line 34.

[0053] In some other embodiments, one end of the strobe line 34 is connected to a second connection plate 13-2, and a signal is provided to the strobe line 34 by one second connection plate 13-2, so that the signal in the strobe line 34 is transmitted from one end to the other end, that is, single-sided driving. No further illustration is provided in the drawings here.

[0054] Figure 8 It is schemed in the embodiment that two shift driving circuits 40 are provided in the second substrate 20 to drive the strobe line 34, and these two shift driving circuits 40 transmit the same signal. In another embodiment, second counter electrode plates 22-2 are respectively disposed at the left and right ends of the second substrate 20 in the third direction c, and the second counter electrode plates 22-2 disposed at both ends in the third direction c are driven by one shift driving circuit 40, that is, the output end of one shift register 41 is connected to two second counter electrode plates 22-2, and these two second counter electrode plates 22-2 respectively correspond to two second connection plates 13-2 connected to a strobe line 34. Such a setting can also achieve double-sided driving of the strobe line 34 and improve the brightness uniformity of the light emitting devices. At the same time, it can also save the wiring space on the second substrate 20, save process consumables and reduce costs.

[0055] Figure 8In the embodiment, the strobe line 34 can be, for example, a scan line connected to the gate of the data writing transistor, or a scan line connected to the gate of the gate reset transistor, or a light emission control line connected to the gate of the light emission control transistor.

[0056] In some embodiments, the strobe line 34 includes a scan line connected to the gate of the data writing transistor and a light emission control line connected to the gate of the light emission control transistor, that is, the strobe line 34 includes two types of signal lines. It can be understood that correspondingly, two types of second connection plates 13-2 are provided on the first substrate 10, and two types of second opposing plates 22-2 and two types of shift driving circuits are provided on the second substrate 20, which are not shown in the drawings here.

[0057] In some embodiments, Figure 9 For Figure 8 a cross-sectional schematic diagram at the position of the middle tangent A-A′, as Figure 9 shown, the second substrate 20 includes a second substrate 21, and the shift driving circuit 40 and the opposing plate 22 are located on the same side of the second substrate 21, that is, in the display panel, the shift driving circuit 40 is located on the side of the second substrate 21 close to the first substrate 10. Such a setting is beneficial to encapsulate and protect the shift driving circuit 40, reduce the risk of line corrosion of the shift driving circuit 40, and improve the reliability of the display panel.

[0058] Combined with Figure 8 and Figure 9 viewed, the shift driving circuit 40 further includes a driving signal line 42, the shift register 41 is electrically connected to the driving signal line 42, and the driving signal line 42 is located on the side of the second substrate 21 close to the first substrate 10; the driving signal line 42 is electrically connected to the bonding plate 23 through a via V penetrating the second substrate 20. In this embodiment, the driving signal line 42 and the shift register 41 are located on the same side of the second substrate 21, and there is no need to fabricate a large-sized via penetrating the second substrate 20 to connect the driving signal line 42 and the shift register 41. The connection method between the driving signal line 42 and the shift register 41 is simpler, the electrical connection reliability is higher, and the performance is more stable.

[0059] In addition, Figure 8 only one driving signal line 42 in the shift driving circuit 40 is schematically shown. Among them, the driving signal line 42 at least includes a start signal line, a clock signal line, and a power line.

[0060] In some embodiments, Figure 10 is another schematic diagram of a display panel provided by an embodiment of the present invention. Taking Figure 8 the second substrate 20 schematically shown as an example, as Figure 10 shown, the second substrate 20 includes a light-shielding layer 50, and the light-shielding layer 50 is located on the side of the shift driving circuit 40 away from the second substrate 21.Figure 10 A top view of the second substrate 20 is schematically shown. It can be understood that the top view direction is parallel to the direction perpendicular to the plane where the second substrate 21 is located. From Figure 10 It can be seen that along the direction perpendicular to the plane where the second substrate 21 is located, the light-shielding layer 50 covers at least a plurality of shift registers 41. In the embodiment of the present invention, the light for display emitted by the light-emitting device 12 on the first substrate 10 towards the display surface does not pass through the second substrate 20, but the light emitted by the light-emitting device 12 may be reflected inside the first substrate 10 and shoot towards the second substrate 20. The light-shielding layer 50 is provided to block the light shooting towards the second substrate 20 after reflection, which can avoid the light from affecting the stability of the transistor characteristics in the shift register 41, thereby ensuring the stable performance of the shift driving circuit 40.

[0061] In some embodiments, Figure 11 Another schematic diagram of the display panel provided by the embodiment of the present invention is shown. As Figure 11 shown, the display panel further includes a functional layer 60. The functional layer 60 covers the surface of the second substrate 20 close to the first substrate 10, and the counter plate 22 is exposed; wherein, the functional layer 60 is a reflective layer or an absorbing layer. In the embodiment of the present invention, the light emitted by the light-emitting device 12 may be reflected inside the first substrate 10 and shoot towards the second substrate 20. When the functional layer 60 is a reflective layer, the reflective layer can reflect the light shooting towards the second substrate 20, so that the light is emitted again towards the light-emitting direction, thereby improving the light-emitting efficiency of the light-emitting device 12. When the functional layer 60 is an absorbing layer, the absorbing layer absorbs the light shooting towards the second substrate 20, for example, it can absorb the ambient light shooting from the first substrate 10 towards the second substrate 20, thereby reducing the reflectivity of the display panel to the ambient light.

[0062] In some embodiments, Figure 12 Another schematic diagram of the display panel provided by the embodiment of the present invention is shown. As Figure 12 shown, the connection plate 13 and the counter plate 22 are electrically connected by a conductive adhesive 61. In other embodiments, the connection plate 13 and the counter plate 22 are electrically connected by an eutectic layer or silver paste. The connection process between the connection plate 13 and the counter plate 22 is mature and the connection reliability is high, which can ensure that the display panel composed of the first substrate 10 and the second substrate 20 has good mechanical stability.

[0063] In some embodiments, Figure 13 Another schematic diagram of the display panel provided by the embodiment of the present invention is shown. Figure 13 A top view of the first substrate 10 is schematically shown. As Figure 13As shown, the first substrate 10 includes a cutting edge 70 surrounding the periphery of the first substrate 10, and the cutting edge 70 is the edge in the circumferential direction of the first substrate 10. A plurality of connecting plates 13 are arranged on one side of the first substrate 10 close to a cutting edge 70, and the distance between the connecting plate 13 and the cutting edge 70 is D, where D≥100μm. Figure 13 In the embodiment, the connecting plate 13 includes Figure 7 the schematic data connecting plate 13-d. In this embodiment, the distance between the connecting plate 13 and the cutting edge 70 is not less than 100μm, indicating that the connecting plate 13 is arranged at a position relatively closer to the middle of the first substrate 10, which can reduce the occupation of the non-display area of the display panel by the connecting plate 13 to achieve a borderless design.

[0064] It can be understood that the counter plate 22 on the second substrate 20 can be arranged according to the position of the connecting plate 13. When the connecting plate 13 is arranged at a position relatively closer to the middle of the first substrate 10, the counter plate 22 is also correspondingly arranged at a position closer to the middle of the second substrate 20.

[0065] Figure 13 In the embodiment, only the schematic illustration of arranging the connecting plate 13 at one end of a cutting edge 70 is shown. In some other embodiments, there is a data connecting plate 13-d for connecting the data line 31 and a second connecting plate 13-2 for connecting the gate line 34 on the first substrate 10, so the connecting plate 13 needs to be arranged at the ends of at least two cutting edges, which is not shown in the drawings here.

[0066] In some embodiments, as Figure 2 shown, along the direction e perpendicular to the plane of the first substrate 11, at least one connecting plate 13 overlaps with the light-emitting device 12. That is, the connecting plate 13 can overlap with the display area. Such an arrangement reduces the occupation of the non-display area of the display panel by the connecting plate 13 and is conducive to achieving a borderless design.

[0067] In some other embodiments, along the direction perpendicular to the plane of the first substrate 11, at least one connecting plate 13 overlaps with the pixel circuit, which is not shown in the drawings here. Such an arrangement also reduces the occupation of the non-display area of the display panel by the connecting plate 13.

[0068] In one embodiment, Figure 14 is another schematic diagram of the display panel provided by the embodiment of the present invention. As Figure 14 shown, the connecting plate 13 is arranged at the middle position of the first substrate 10, which can avoid the cutting edge of the first substrate 10. A counter plate 22 corresponding to the connecting plate 13 is arranged on the second substrate 20, and the counter plate 22 passes through the via hole penetrating the second substrate 20 ( Figure 14(not shown) is connected to the second connection line 25, and then connected to the bonding pad 23 through the second connection line 25, on the side of the second substrate 20 away from the first substrate 10. A plurality of bonding pads 23 are arranged in a row, and such an arrangement facilitates bonding with the display driving structure.

[0069] In some other embodiments, Figure 15 is a schematic diagram of another display panel provided by an embodiment of the present invention. As Figure 15 shown, the display panel further includes a display driving structure 80, and the display driving structure 80 is bonded to the bonding pad 23. The display driving structure 80 is a display driving chip. In some other embodiments, the display driving structure 80 is a flexible circuit board fixed with a driving chip, and the drawing is not shown here again.

[0070] Based on the same inventive concept, an embodiment of the present invention provides a display device. Figure 16 is a schematic diagram of a display device provided by an embodiment of the present invention. As Figure 16 shown, the display device includes the display panel 100 provided by any embodiment of the present invention. The structure of the display panel 100 has been described in the above embodiments and will not be elaborated here. The display device provided by the embodiment of the present invention can be, for example, an electronic display device such as a computer, a tablet, a billboard, or an in-vehicle display.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes a first substrate and a second substrate stacked on top of each other; The first substrate includes a first substrate and a light-emitting device. The light-emitting device is located on a side of the first substrate close to the second substrate, and a side of the first substrate away from the second substrate is a display surface of the display panel; The first substrate includes a connection plate, and the connection plate is located on a side of the first substrate close to the second substrate; The second substrate includes a counter plate and a bonding plate. The counter plate is located on a side of the second substrate close to the first substrate, and the bonding plate is located on a side of the second substrate away from the first substrate; Wherein, the counter plate and the connection plate are electrically connected correspondingly, and at least a part of the counter plate is electrically connected to the bonding plate through a via hole penetrating the second substrate.

2. The display panel according to claim 1, wherein A surface of the light-emitting device close to the first substrate is a light-emitting surface; The light-emitting device includes a first electrode and a second electrode, and both the first electrode and the second electrode are provided on a side of the light-emitting device away from the first substrate.

3. The display panel according to claim 2, wherein The first substrate includes a pixel circuit and a first power supply structure on the same side of the first substrate as the light-emitting device; The first substrate further includes a first insulating layer, a first jumper wire, and a second jumper wire. The first insulating layer covers the pixel circuit, the light-emitting device, and the first power supply structure on a side of the light-emitting device away from the first substrate, and the first jumper wire and the second jumper wire are located on a side of the first insulating layer away from the first substrate; One end of the first jumper wire is electrically connected to the first electrode through a first via hole penetrating the first insulating layer, and the other end of the first jumper wire is electrically connected to the pixel circuit through a second via hole penetrating the first insulating layer; One end of the second jumper wire is electrically connected to the second electrode through a third via hole penetrating the first insulating layer, and the other end of the second jumper wire is electrically connected to the first power supply structure through a fourth via hole penetrating the first insulating layer.

4. The display panel according to claim 1, wherein The first substrate includes a constant voltage structure on the same side of the first substrate as the light-emitting device, and the constant voltage structure transmits a constant voltage signal; The connection plate includes a first connection plate, and the constant voltage structure is electrically connected to the first connection plate; The counter plate includes a first counter plate, and the first counter plate is electrically connected to the first connection plate correspondingly; The first connection plates are provided at both ends of the first substrate in a first direction.

5. The display panel according to claim 4, wherein The constant voltage structure includes a reset signal line extending along a second direction, and the second direction intersects with the first direction; The first connection plate includes a first sub-connection plate connected to the reset signal line, and the first sub-connection plates are provided at both ends of the first substrate in the first direction; The first substrate further includes at least one reset bus, one end of the reset bus is connected to the first sub-connection plate at one end of the first substrate in the first direction, and the other end of the reset bus is connected to the first sub-connection plate at the other end of the first substrate in the first direction; The reset bus is electrically connected to a plurality of the reset signal lines.

6. The display panel according to claim 1, wherein The first substrate includes a plurality of gate lines; The connection plate includes a second connection plate, at least one end of the gate line is electrically connected to the second connection plate; the counter plate includes a second counter plate, and the second counter plate is electrically connected to the second connection plate correspondingly; The second substrate includes a shift driving circuit, the shift driving circuit includes a plurality of cascaded shift registers, and the output end of the shift register is electrically connected to the second counter plate.

7. The display panel according to claim 6, wherein The second substrate includes a second substrate, and the shift driving circuit is located on a side of the second substrate close to the first substrate.

8. The display panel according to claim 7, wherein The shift driving circuit further includes driving signal lines, the shift register is electrically connected to the driving signal lines, and the driving signal lines are located on a side of the second substrate close to the first substrate; The driving signal lines are electrically connected to the bonding plate through vias penetrating the second substrate.

9. The display panel according to claim 7, wherein The second substrate includes a light-shielding layer, and the light-shielding layer is located on a side of the shift driving circuit away from the second substrate; In a direction perpendicular to the plane of the second substrate, the light-shielding layer at least covers a plurality of the shift registers.

10. The display panel according to claim 6, wherein The gate lines extend in a third direction, and a plurality of the gate lines are arranged in a fourth direction, and the third direction intersects the fourth direction; At at least one end of the first substrate in the third direction, a plurality of the second connection plates are arranged in the fourth direction.

11. The display panel according to claim 1, wherein The display panel further includes a functional layer, the functional layer covers a surface of the second substrate on a side close to the first substrate, and the functional layer exposes the counter plate; The functional layer is a reflective layer or a light-absorbing layer.

12. The display panel according to claim 1, wherein The connection plate and the counter plate are electrically connected by one of conductive adhesive, eutectic layer, and silver paste.

13. The display panel according to claim 1, wherein The first substrate includes a cutting edge surrounding the periphery of the first substrate, The distance between the connection plate and the cutting edge is D, D≥100μm.

14. The display panel according to claim 1, wherein In a direction perpendicular to the plane of the first substrate, at least one of the connection plates overlaps with the light-emitting device; Alternatively, the first substrate further includes a pixel circuit, and at least one of the connection plates overlaps with the pixel circuit in a direction perpendicular to the plane where the first substrate is located.

15. The display panel according to claim 1, wherein the display panel further includes a display driving structure, and the display driving structure is bonded and connected to the bonding plate.

16. A display device, characterized in that, A display panel including any one of claims 1 to 15.

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