CN113707698A - Transparent display panel and display device - Google Patents
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- CN113707698A CN113707698A CN202111002678.XA CN202111002678A CN113707698A CN 113707698 A CN113707698 A CN 113707698A CN 202111002678 A CN202111002678 A CN 202111002678A CN 113707698 A CN113707698 A CN 113707698A
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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Abstract
The invention discloses a transparent display panel and a display device, which aim to solve the problem that the transparent display panel in the prior art is large in frame width. The transparent display panel comprises a substrate base plate with a display area, wherein the display area of the substrate base plate is provided with: the driving unit comprises a plurality of repeating units distributed in an array manner and a plurality of driving units which are sequentially cascaded along a first direction, wherein the driving unit comprises a plurality of driving structure groups; in at least one of the repeating units, the repeating unit includes a pixel region, and a transparent region; at least one of the drive structure groups is disposed within the transparent region of the repeating unit.
Description
Technical Field
The invention relates to the technical field of semiconductors, in particular to a transparent display panel and a display device.
Background
With the development of organic light emitting display technology, transparent display gradually moves to medium and large size, and especially the demand for the spliced screen is also increasing. However, the transparent display panel of the prior art has a problem of large frame width.
Disclosure of Invention
The invention provides a transparent display panel and a display device, which are used for solving the problem that the transparent display panel in the prior art has larger frame width.
The embodiment of the invention provides a transparent display panel, which comprises a substrate base plate with a display area, wherein the display area of the substrate base plate is provided with: the driving unit comprises a plurality of repeating units distributed in an array manner and a plurality of driving units which are sequentially cascaded along a first direction, wherein the driving unit comprises a plurality of driving structure groups;
in at least one of the repeating units, the repeating unit includes a pixel region, and a transparent region; at least one of the drive structure groups is disposed within the transparent region of the repeating unit.
In a possible embodiment, a plurality of said drive structure components of the same said drive unit are provided in said transparent regions of different said repeating units perpendicular to said first direction.
In one possible embodiment, the driving unit includes a gate driving unit; the plurality of drive structure groups include: the first grid driving element group and the second grid driving element group are positioned in the transparent regions of two adjacent repeating units;
the first gate driving element group includes: a plurality of first-type thin film transistors, a first gate power supply signal line, and a second gate power supply signal line;
the second gate driving element group comprises a plurality of second type thin film transistors and a plurality of first type capacitors, wherein the channel width-length ratio of at least one second type thin film transistor is larger than the communication width-length ratio of the first type thin film transistors.
In one possible embodiment, the plurality of drive structure groups further comprises: the first grid driving line group is positioned on one side, away from the second grid driving element group, of the first grid driving element group, and the first grid driving element group and the first grid driving line group are positioned in the transparent regions of two adjacent repeating units;
the first gate driving wire group comprises a first gate clock signal line and a second gate clock signal line.
In one possible embodiment, the driving unit further includes a light emitting driving unit located at one side of the gate driving unit, and the plurality of driving structure groups further include: the first light-emitting driving element group and the second light-emitting driving element group are positioned in the transparent regions of two adjacent repeating units;
the first light-emitting driving element group comprises a plurality of third type thin film transistors and a plurality of second type capacitors;
the second light-emitting driving element group comprises a plurality of fourth type thin film transistors and at least one third type capacitor; and the channel width-length ratio of at least one fourth type thin film transistor is larger than that of the third type thin film transistor.
In one possible embodiment, the plurality of drive structure groups further comprises: the first light-emitting driving wiring group is positioned on one side of the first light-emitting driving element group, which is far away from the second light-emitting driving element group, and the second light-emitting driving wiring group is positioned on one side of the second light-emitting driving element group, which is far away from the first light-emitting driving element group, the first light-emitting driving wiring group and the first light-emitting driving element group are positioned in the transparent regions of two adjacent repeating units, and the second light-emitting driving wiring group and the second light-emitting driving element group are positioned in the transparent regions of two adjacent repeating units;
the first light-emitting driving wire group includes: a first light emitting clock signal line, a second light emitting clock signal line, and a first light emitting power line;
the second type of light-emitting driving wiring group comprises: a second light emitting power line.
In one possible embodiment, the transparent display panel includes a group of driving circuits formed by a plurality of the driving units cascaded in the first direction; in the direction perpendicular to the first direction, the minimum distances of the driving circuit groups from two opposite edges of the transparent display panel are equal.
In one possible implementation, the transparent display panel includes two sets of driving circuit groups, each set of driving circuit groups including a plurality of driving units sequentially cascaded in the first direction;
in the first direction, two groups of the driving circuits are respectively positioned at one quarter and three quarters of the distance between two opposite edges of the transparent display panel.
In a possible embodiment, each of the repeating units further includes a first transfer region extending along the first direction, and a second transfer region extending perpendicular to the first direction;
the outline of the repeating unit is a quadrangle, the pixel area, the transparent area, the first transmission area and the second transmission area are respectively located in four corner areas of the quadrangle, the first transmission area and the second transmission area are located in an area where a diagonal line of the quadrangle passes, and the pixel area and the transparent area are located in an area where another diagonal line of the quadrangle passes.
In one possible embodiment, the pixel region includes at least one pixel, and the pixel includes a first electrode, a light-emitting layer on a side of the first electrode away from the substrate, and a plurality of second electrodes on a side of the light-emitting layer away from the first electrode;
the pixel region and the second electrode are arranged correspondingly, and the orthographic projection of the second electrode on the substrate covers the orthographic projection of the pixel region on the substrate.
In one possible embodiment, the transparent display panel further comprises a routing layer between the first electrode and the base substrate;
the transparent display panel further includes: the second electrode lead is electrically connected with the second electrode through the lap electrode.
In one possible implementation, the transparent display panel includes a first flat layer, a second flat layer, a pixel definition layer, a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are sequentially located on a side of the pixel facing away from the substrate;
the transparent display panel further includes a blocking dam located at a periphery of the display region, the blocking dam including the first planarization layer, the second planarization layer, a groove structure formed by the pixel defining layer and having a recess toward one side of the second planarization layer, the first inorganic encapsulation layer, and the second inorganic encapsulation layer, which are stacked.
In a possible implementation manner, the transparent display panel further includes at least one ring of anti-cracking dam located on one side of the blocking dam away from the display area, and the anti-cracking dam includes a first metal portion on the same layer as the source/drain electrode.
In one possible embodiment, the transparent display panel further comprises a gate layer, an interlayer dielectric layer and a passivation layer between the substrate base plate and the first flat layer;
the transparent display panel further comprises a panel crack detection line positioned between the blocking dam and the anti-cracking dam; the panel crack detection line comprises: a second metal portion on a same layer as the gate layer.
In one possible embodiment, edges of the first and second inorganic encapsulation layers are located between the panel crack detection line and the crack prevention dam.
In a possible embodiment, the minimum distance between the panel crack detection line and the edge is larger than the minimum distance between the panel crack detection line and the barrier dam.
In one possible embodiment, the transparent display panel further comprises a transparent cover plate located on a side of the second inorganic encapsulation layer facing away from the organic encapsulation layer.
The embodiment of the invention also provides a display device which comprises a plurality of transparent display panels provided by the embodiment of the invention, and the plurality of transparent display panels are spliced with each other.
The embodiment of the invention has the following beneficial effects: the drive structure group of the drive unit is arranged in the transparent area of the display area repeating unit, the frame width of the transparent display panel can be reduced, the problem that when the drive unit is arranged on the frame of the transparent display panel, the transparent display panel has larger frame width is solved, and when a plurality of transparent display panels are spliced into a large-size display device, a larger gap exists between adjacent transparent display panels.
Drawings
Fig. 1 is a top view of a transparent display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a repeating unit provided in an embodiment of the present invention;
fig. 3 is a schematic cascade diagram of a driving unit according to an embodiment of the present invention;
FIG. 4 is a partial enlarged view of one of the schematic drawings of FIG. 1;
FIG. 5 is a second enlarged partial schematic view of FIG. 1;
FIG. 6 is a third schematic view of the enlarged portion of FIG. 1;
FIG. 7 is a fourth partial enlarged view of FIG. 1;
FIG. 8 is a fifth partial enlarged view of FIG. 1;
fig. 9 is one of the schematic views of the arrangement of the driving unit according to the embodiment of the present invention;
fig. 10 is a second schematic view of a driving unit according to an embodiment of the present invention;
FIG. 11 is an enlarged schematic view of a pixel region according to an embodiment of the invention;
FIG. 12 is a schematic view of a second electrode distribution according to an embodiment of the present invention;
fig. 13 is a schematic cross-sectional view of a pixel provided in an embodiment of the invention;
FIG. 14 is a schematic cross-sectional view of a bezel provided in accordance with an embodiment of the present invention;
fig. 15 is a schematic top view of a frame according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
Referring to fig. 1, fig. 2 and fig. 3, where fig. 2 is an enlarged schematic view of one repeating unit 1 in fig. 1, and fig. 3 is a schematic view of a cascade of a plurality of driving units 2, an embodiment of the present invention provides a transparent display panel, including a substrate base having a display area, and on the display area of the substrate base, there are disposed: a plurality of repeating units 1 distributed in an array, and a plurality of driving units 2 sequentially cascaded along a first direction a 1; the drive unit 2 comprises a plurality of drive structure groups 20;
in at least one repeating unit 1, the repeating unit 1 includes a pixel region 11, and a transparent region 12; at least one group of drive structures 20 is arranged within the transparent region 12 of the repeating unit 1. Specifically, each of the repeating units 1 may include a pixel region 11, and a transparent region 12; specifically, only a part of the drive structure group 20 may be provided in the transparent region 12 of the repeating unit 1, or all of the drive structure groups 20 may be provided in the transparent region 12 of the repeating unit 1.
In the embodiment of the present invention, the driving structure group 20 of the driving unit 2 is disposed in the transparent region 12 of the display area repeating unit 1, so that the frame width of the transparent display panel can be reduced, and the problem that when the driving unit 2 is disposed in the frame of the transparent display panel, the transparent display panel has a larger frame width, and when a plurality of transparent display panels are spliced into a large-sized display device, a larger gap exists between adjacent transparent display panels is solved.
It should be noted that fig. 2 is for illustrating a plurality of regions of the repeating unit 1, and the arrangement structure of the transparent region 12 is not illustrated, but the present invention is not limited thereto, and the arrangement structure of the transparent region 12 may be specifically combined with that illustrated in fig. 1.
In a possible embodiment, as shown in fig. 1, a plurality of driving structure groups 20 of the same driving unit 2 are arranged in the transparent regions 12 perpendicular to the different repeating units 2 in the first direction a 1. Compared with the case that the whole driving unit 2 is arranged in the transparent region 12 of one repeating unit 1, in the embodiment of the invention, the plurality of driving structure groups 20 of the same driving unit 2 are respectively arranged in the transparent regions 12 of different repeating units 2 in the direction perpendicular to the first direction a1, so that the transparent display panel can enable the repeating unit 1 provided with the driving unit 2 to have higher transmittance, and meet the requirement of transparent display.
In one possible embodiment, referring to fig. 1, 4 and 5, wherein fig. 4 is an enlarged schematic view of a first gate driving element group 21, fig. 5 is an enlarged schematic view of a second gate driving element group 22, and the driving unit 2 includes the gate driving unit 21; the plurality of drive structure groups 20 includes: a first gate driving element group 21, a second gate driving element group 22 located at one side of the first gate driving element group 21, wherein the first gate driving element group 21 and the second gate driving element group 22 are located in the transparent regions 12 of two adjacent repeating units 1; the first gate driving element group 21 includes: a plurality of first-type thin film transistors T100, a first gate power supply signal line VGH1, and a second gate power supply signal line VGL 2; the second gate driving element group 22 includes a plurality of second type tfts T00 and a plurality of first type capacitors C100, wherein a channel width-to-length ratio (W/L, where W represents a line width of an active layer in a tft and L represents a length of a gate overlying the active layer) of at least one of the second type tfts T200 is greater than a channel width-to-length ratio of the first type tfts T100. Specifically, taking the conventional gate driving unit 21 including 8T2C as an example, the plurality of first-type thin film transistors T100 of the first gate driving element group 21 may specifically include a first gate driving thin film transistor T-1, a second gate driving thin film transistor T-2, a third gate driving thin film transistor T-3, a fourth gate driving thin film transistor T4, a fifth gate driving thin film transistor T-5, and an eighth gate driving thin film transistor T-8; the plurality of second-type thin film transistors T200 may specifically include a sixth gate driving thin film transistor T-6 and a seventh gate driving thin film transistor T-7; the plurality of first-type capacitors C100 may specifically include a first gate driving capacitor C-1 and a second gate driving capacitor C-2; specifically, the channel width-to-length ratio of the sixth gate driving thin film transistor T-6 may be greater than the communication width-to-length ratio of each first-type thin film transistor T100, and the channel width-to-length ratio of the seventh gate driving thin film transistor T-7 may be greater than the communication width-to-length ratio of each first-type thin film transistor T100. In the embodiment of the present invention, the second type thin film transistor T200 having a large channel width-length ratio is separately disposed from the first type thin film transistor T100, so that transmittances of different repeating units 1 are substantially the same. Specifically, the transmittances are approximately the same, and the difference between the transmittances is understood to be 0 to 30%.
In one possible embodiment, referring to fig. 6, the plurality of drive structure groups 20 further comprises: the first gate driving line group 23 is located on one side of the first gate driving element group 21 away from the second gate driving element group 22, and the first gate driving element group 21 and the first gate driving line group 23 are located in the transparent regions 12 of two adjacent repeating units 1; the first GATE driving wire group 23 includes a first GATE clock signal line CLK _ GATE1 and a second GATE clock signal line CLK _ GATE 2. In contrast to the first GATE clock signal line CLK _ GATE1 and the second GATE clock signal line CLK _ GATE2 being disposed in the first GATE driving element group 21 and/or the second GATE driving element group 22, in the embodiment of the present invention, the first GATE clock signal line CLK _ GATE1 and the second GATE clock signal line CLK _ GATE2 are separately disposed from the first GATE driving element group 21 and the second GATE driving element group 22, so that the problems of complicated routing and insufficient layout space of the tfts in the same repeating unit 1 can be avoided.
In one possible embodiment, referring to fig. 1, 7 and 8, the driving unit 2 further includes a light emitting driving unit 22 located at one side of the gate driving unit 21, and the plurality of driving structure groups 20 further include: a first light-emitting driving element group 221, a second light-emitting driving element group 222 located at one side of the first light-emitting driving element group 221, the first light-emitting driving element group 221 and the second light-emitting driving element group 222 being located in the transparent regions 12 of two adjacent repeating units 1; the first light emitting driving element group 221 includes a plurality of third type thin film transistors T300 and a plurality of second type capacitors C200; the second light emitting driving element group 222 includes a plurality of fourth type thin film transistors T400 and at least one third type capacitor C300; the channel width-length ratio of at least one fourth type thin film transistor T400 is greater than the channel width-length ratio of the third type thin film transistor T300. Specifically, taking the conventional light-emitting driving unit 22 including 10T3C as an example, the plurality of third-type thin film transistors T200 of the first light-emitting driving element group 221 may specifically include a first light-emitting driving thin film transistor T-1, a second light-emitting driving thin film transistor T-2, a third light-emitting driving thin film transistor T-3, a fourth light-emitting driving thin film transistor T-4, a fifth light-emitting driving thin film transistor T-5, a sixth light-emitting driving thin film transistor T-6, and a seventh light-emitting driving thin film transistor T-7; the plurality of fourth type thin film transistors T400 may specifically include an eighth light emission driving thin film transistor T8, a ninth light emission driving thin film transistor T-9, and a tenth light emission driving thin film transistor T10; the plurality of second-type capacitors C200 may specifically include a second light emission driving capacitor C-2 and a third light emission driving capacitor C-3; the plurality of third type capacitors C300 may specifically include a first light emitting driving capacitor C-1. Specifically, the channel width-to-length ratio of the ninth light-emitting driving thin film transistor T-9 may be greater than the communication width-to-length ratio of each third thin film transistor T300, and the channel width-to-length ratio of the tenth light-emitting driving thin film transistor T10 may be greater than the communication width-to-length ratio of each third thin film transistor T300. In the embodiment of the present invention, the fourth type thin film transistor T400 and the third type thin film transistor T300 having a large channel width-length ratio are separately disposed, so that transmittances of different repeating units 1 are substantially the same. Specifically, the transmittances are approximately the same, and the difference between the transmittances is understood to be 0 to 30%.
In one possible embodiment, as shown in fig. 1, 7 and 8, the plurality of drive structure groups 20 further comprises: a first light-emitting driving wire group 223 located on a side of the first light-emitting driving element group 221 far from the second light-emitting driving element group 222, and a second light-emitting driving wire group 224 located on a side of the second light-emitting driving element group 222 far from the first light-emitting driving element group 221, wherein the first light-emitting driving wire group 223 and the first light-emitting driving element group 221 are located in the transparent regions 12 of two adjacent repeating units 1, and the second light-emitting driving wire group 224 and the second light-emitting driving element group 222 are located in the transparent regions 12 of two adjacent repeating units 1; the first light emission driving wiring group 223 includes: a first light-emitting clock signal line CLK _ EM1, a second light-emitting clock signal line CLK _ EM2, and a first light-emitting power line VGH 3; the second-type light-emission driving wiring group 224 includes: and a second light emitting power line VGH 4. In the embodiment of the present invention, the first light emitting clock signal line CLK _ EM1, the second light emitting clock signal line CLK _ EM2, and the first light emitting power line VGH3 are separately and independently disposed from the first light emitting driving element group 221 and the second light emitting driving element group 222, so that the problems of complicated wiring in the same repeating unit 1 and insufficient layout space of the thin film transistors can be avoided.
Specifically, the upper and lower sides of the pixel P2 are connected by a signal line extending along the first direction a1, and the signal line includes a DATA trace: DATA lines DATA corresponding to the red pixels R, DATA lines DATA corresponding to the green pixels G, DATA lines DATA corresponding to the blue pixels B, pixel circuit power supply lines VDD, and an initial signal line VINT. The output terminals EM-OUT of the light emission driving unit 22 are wired with vertical SD and connected to the pixel light emission signal lines pixel-EM through via holes, thereby forming signal transfer. The output terminal GATE-OUT of the GATE driving unit is wired with vertical SD and connected to the Pixel GATE line Pixel-GATE and the Pixel reset signal line Pixel-RST2 (shared by GATE/RST 2) through a via, thereby forming signal transmission.
It should be noted that the above is a schematic description of the driving unit 2 including the GATE driving unit 21(GATE-GOA) and the emission driving unit 22(EM-GOA), but the present invention is not limited thereto, and in the specific implementation, the driving unit 2 may also include other types of driving units, for example, the driving unit 2 further includes: the reset driving unit RST may specifically include, for example: a reset driving unit RST1 for resetting the capacitor and the gate of the driving transistor (DTFT), a reset driving unit RST2 for resetting the anode of the OLED; the GATE driving unit 21(GATE-GOA) and the reset driving unit RST may be independently disposed, or the GATE driving unit 21(GATE-GOA) and the reset driving unit RST may be disposed in common, for example, the GATE-GOA, the RST1, and the RST2 are separately driven by three groups of GOAs, and for example, the GATE-GOA/RST1 is common; RST1/RST2 are shared; GATE-GOA/RST2 in common; GATE-GOA/RST1/RST2 common, etc.
Referring to fig. 9, the transparent display panel includes a group B of driving circuits formed by a plurality of driving units 2 cascade-connected in a first direction a 1; in the direction perpendicular to the first direction a1, the minimum distances of the driving circuit groups B from the two opposite edges of the transparent display panel are equal. Specifically, as shown in fig. 9, the minimum distance from the left edge of the transparent display panel to the driving circuit group B is h1, the minimum distance from the right edge of the transparent display panel to the driving circuit group B is h2, and h1 is h 2. In the embodiment of the invention, for the transparent display panel driven by the single driving circuit group B, the single driving circuit group B is positioned in the middle position of the transparent display panel, so that the routing loads between the driving circuit group B and the left and right pixels are consistent, and the problem of uneven brightness of the left and right sides of the transparent display panel caused by inconsistent routing loads of the two sides is avoided.
In one possible embodiment, referring to fig. 10, the transparent display panel includes two sets of driving circuit groups B, each of which includes a plurality of driving units 2 sequentially cascaded in a first direction a 1; in the direction perpendicular to the first direction a1, the two sets of driving circuits B are located at one quarter and three quarters of the distance between the two opposite edges of the transparent display panel, respectively. Specifically, as shown in fig. 10, the left driving circuit group B is located one-fourth of the distance h3 between the two edges of the transparent display panel, and the right driving circuit group B is located three-fourths of the distance h3 between the two edges of the transparent display panel. In the embodiment of the invention, for the transparent display panel driven by the dual-drive circuit group B, the two drive circuit groups B are respectively positioned at the one fourth and three quarters of the distance between the two opposite edges of the transparent display panel, so that the routing loads between the drive circuit group B and the pixels at the left and right sides of the drive circuit group B are consistent, and the problem of uneven brightness at the left and right sides of the transparent display panel caused by inconsistent routing loads at the two sides is avoided.
In a possible embodiment, shown in fig. 2, each repeating unit 1 further comprises a first transmission region 13 extending along the first direction a1, and a second transmission region 14 extending along a direction perpendicular to the first direction a 1; the outline of the repeating unit 1 is a quadrangle, the pixel region 11, the transparent region 12, the first transmission region 13, and the second transmission region 14 are respectively located in four corner regions of the quadrangle, the first transmission region 13 and the second transmission region 14 are located in a region where a diagonal k2 of the quadrangle passes, the pixel region 11 and the transparent region 12 are located in a region where another diagonal k1 of the quadrangle passes, that is, the first transmission region 13 and the second transmission region 14 are diagonally arranged, and the pixel region 11 and the transparent region 12 are diagonally arranged.
In one possible implementation, referring to fig. 11, 12 and 13, in which fig. 11 is an enlarged schematic view of a pixel region 11, the pixel region 11 includes at least one pixel P2, a pixel P2 includes a first electrode P21, a light-emitting layer P23 located on a side of the first electrode P21 away from the substrate 1, and a plurality of second electrodes P22 located on a side of the light-emitting layer P23 away from the first electrode P21; the pixel region 11 is provided corresponding to the second electrode P22, and an orthogonal projection of the second electrode P22 on the substrate 1 covers an orthogonal projection of the pixel region 11 on the substrate 1. Specifically, the first electrode P21 may be an anode, and the second electrode P22 may be a cathode. In the embodiment of the invention, the same pixel region 11 shares the same second electrode P22, the second electrodes P22 of different pixel regions 11 are separated from each other, the plurality of second electrodes P22 of the transparent display panel are island-shaped and separated from each other, and the second electrode P22 only covers the pixel region 11, so that the transmittance of the transparent display panel can be increased.
In one possible implementation, referring to fig. 13, the transparent display panel further includes a wiring layer (specifically, a film layer for disposing the power supply line VSS/VDD) between the first electrode P21 and the substrate 1; the transparent display panel further includes: a lap electrode P14 on the same layer as the first electrode P21, and a second electrode lead P15 on the same layer as the wiring layer, the second electrode lead P15 being electrically connected to the second electrode P22 through a lap electrode P14.
In one possible implementation, referring to fig. 14 and 15, the transparent display panel includes a first planarization layer 15, a second planarization layer 16, a pixel defining layer 17, a first inorganic encapsulation layer 181, an organic encapsulation layer 182, a second inorganic encapsulation layer 183; the transparent display panel further includes a barrier dam T1 located at the periphery of the display area AA, and the barrier dam T1 includes a first planarization layer 15, a second planarization layer 16, a groove structure X formed by the pixel defining layer 17 and having a recess toward one side of the second planarization layer 16, a first inorganic encapsulation layer 181, and a second inorganic encapsulation layer 183, which are stacked. In the embodiment of the present invention, the blocking dam T1 further includes a groove structure X formed by the pixel defining layer 17 and located on the side of the second planarization layer 16 away from the first planarization layer 15, which can further prevent the organic encapsulation material from overflowing when the organic encapsulation layer 182 is formed, thereby reducing the frame width of the transparent display panel.
Specifically, in the embodiment of the present invention, only one blocking dam T1 may be provided, and a design in which a dam for blocking the organic encapsulation material and a dam formed by the inorganic encapsulation material are integrated may be adopted, so as to ensure that the organic encapsulation material does not overflow and ensure the function of blocking water and oxygen.
In one possible embodiment, referring to fig. 14 and 15, the transparent display panel further includes at least one ring of anti-cracking dams T2 located on a side of the blocking dam T1 away from the display area AA, and the anti-cracking dam T2 includes a first metal portion P16 in the same layer as the source and drain electrodes. In the embodiment of the invention, the transparent display panel further comprises at least one ring of anti-cracking dams T2 positioned on one side of the blocking dam T1 away from the display area AA, and the anti-cracking dams T2 comprise first metal parts P16 which are in the same layer with the source and drain electrodes, so that internal expansion of cracks (crack) can be prevented or slowed down.
In one possible embodiment, referring to fig. 14 and 15, the transparent display panel further includes a gate layer 12, an interlayer dielectric layer 13, and a passivation layer 14 between the substrate base plate 1 and the first planarization layer 15; the transparent display panel further includes a panel crack detection line T3 between the blocking dam T1 and the crack prevention dam T2; the panel crack detection line T3 includes: and a second metal part PCD on the same layer as the gate layer 12. In the embodiment of the present invention, the transparent display panel further includes a panel crack detection line T3, the panel crack detection line T3 includes a second metal PCD part in the same layer as the gate layer 12, which can detect the package failure, and the routing of the gate layer 12 has a certain brittleness, which is easier to break than the routing layer and other metal routing, and has a better effect of detecting the package failure.
In one possible embodiment, as shown in fig. 14 and 15, the edges Edge of the first and second inorganic encapsulation layers 181 and 183 are located between the panel crack detection line T3 and the crack prevention dam T2.
In a possible embodiment, referring to fig. 14 and 15, the minimum distance b1 between the panel crack detection line T3 and the Edge is greater than the minimum distance b2 between the panel crack detection line T3 and the barrier dam T1, and in the embodiment of the present invention, the minimum distance b1 between the panel crack detection line T3 and the Edge is greater than the minimum distance b2 between the panel crack detection line T3 and the barrier dam T1, so that the effective encapsulation distance of the inorganic encapsulation material, that is, the distance of blocking water and oxygen can be increased, and the encapsulation performance is better.
In one possible embodiment, as shown in fig. 13 after being combined, the transparent display panel further includes a transparent cover P4 located on a side of the second inorganic encapsulation layer 183 away from the organic encapsulation layer 182. Specifically, the transparent cover P4 may be a frame clear ink cover. Because the frame of the transparent display panel is narrow, a cover plate with an ink frame does not need to be arranged to shield the frame.
Specifically, in the transparent display panel of the present invention, the arrangement order of the film layers on one side of the substrate may be: active layer (channel layer Poly), grid/capacitor bottom plate, capacitor top plate, interlayer dielectric layer/punch ILD, source drain layer SD1, passivation/inorganic layer PVX, first flat layer PLN1, routing layer SD2(VSS/VDD), second flat PLN2, anode AND, pixel definition PDL, light emitting layer, cathode, packaging layer, AND inkless cover plate.
Specifically, as shown in fig. 13, a driving layer P1 may be further disposed between the substrate base plate 1 and the pixel P2, and the driving layer P1 may specifically include an active layer, a gate layer, and a routing layer; the design of the bezel P3 of the transparent display panel can be seen in fig. 14 and 15. The substrate 1 may be a flexible substrate.
Specifically, the transparent region 12 in the repeating unit 1 in the embodiment of the present invention may be a cut-out of the first flat layer 15, the second flat layer 16, and the pixel defining layer 17. The pixel region 11, the first transfer region 13, and the second transfer region 14 may be dug out only the pixel defining layer 17.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, which includes a plurality of transparent display panels provided in the embodiment of the present invention, and the plurality of transparent display panels are spliced with each other to form a large-size transparent display panel without a splicing seam or a narrow splicing seam.
The embodiment of the invention has the following beneficial effects: the drive structure group of the drive unit is arranged in the transparent area of the display area repeating unit, the frame width of the transparent display panel can be reduced, the problem that when the drive unit is arranged on the frame of the transparent display panel, the transparent display panel has larger frame width is solved, and when a plurality of transparent display panels are spliced into a large-size display device, a larger gap exists between adjacent transparent display panels.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (18)
1. A transparent display panel, comprising a substrate having a display area, wherein: the driving unit comprises a plurality of repeating units distributed in an array manner and a plurality of driving units which are sequentially cascaded along a first direction, wherein the driving unit comprises a plurality of driving structure groups;
in at least one of the repeating units, the repeating unit includes a pixel region, and a transparent region; at least one of the drive structure groups is disposed within the transparent region of the repeating unit.
2. The transparent display panel of claim 1, wherein a plurality of the driving structure components of the same driving unit are disposed in the transparent regions of different repeating units perpendicular to the first direction.
3. The transparent display panel of claim 2, wherein the driving unit comprises a gate driving unit; the plurality of drive structure groups include: the first grid driving element group and the second grid driving element group are positioned in the transparent regions of two adjacent repeating units;
the first gate driving element group includes: a plurality of first-type thin film transistors, a first gate power supply signal line, and a second gate power supply signal line;
the second gate driving element group comprises a plurality of second type thin film transistors and a plurality of first type capacitors, wherein the channel width-length ratio of at least one second type thin film transistor is larger than the communication width-length ratio of the first type thin film transistors.
4. The transparent display panel of claim 3, wherein the plurality of groups of drive structures further comprises: the first grid driving line group is positioned on one side, away from the second grid driving element group, of the first grid driving element group, and the first grid driving element group and the first grid driving line group are positioned in the transparent regions of two adjacent repeating units;
the first gate driving wire group comprises a first gate clock signal line and a second gate clock signal line.
5. The transparent display panel of claim 3, wherein the driving unit further comprises a light emitting driving unit at one side of the gate driving unit, and the plurality of driving structure groups further comprise: the first light-emitting driving element group and the second light-emitting driving element group are positioned in the transparent regions of two adjacent repeating units;
the first light-emitting driving element group comprises a plurality of third type thin film transistors and a plurality of second type capacitors;
the second light-emitting driving element group comprises a plurality of fourth type thin film transistors and at least one third type capacitor; and the channel width-length ratio of at least one fourth type thin film transistor is larger than that of the third type thin film transistor.
6. The transparent display panel of claim 5, wherein the plurality of groups of drive structures further comprises: the first light-emitting driving wiring group is positioned on one side of the first light-emitting driving element group, which is far away from the second light-emitting driving element group, and the second light-emitting driving wiring group is positioned on one side of the second light-emitting driving element group, which is far away from the first light-emitting driving element group, the first light-emitting driving wiring group and the first light-emitting driving element group are positioned in the transparent regions of two adjacent repeating units, and the second light-emitting driving wiring group and the second light-emitting driving element group are positioned in the transparent regions of two adjacent repeating units;
the first light-emitting driving wire group includes: a first light emitting clock signal line, a second light emitting clock signal line, and a first light emitting power line;
the second type of light-emitting driving wiring group comprises: a second light emitting power line.
7. The transparent display panel according to claim 1, wherein the transparent display panel includes a group of driving circuits formed by a plurality of the driving units being cascade-connected in the first direction; in the direction perpendicular to the first direction, the minimum distances of the driving circuit groups from two opposite edges of the transparent display panel are equal.
8. The transparent display panel according to claim 1, wherein the transparent display panel includes two sets of driving circuit groups, each of the driving circuit groups including a plurality of the driving units sequentially cascaded in the first direction;
in the first direction, two groups of the driving circuits are respectively positioned at one quarter and three quarters of the distance between two opposite edges of the transparent display panel.
9. The transparent display panel of claim 1, wherein each of the repeating units further comprises a first transmission region extending in the first direction, and a second transmission region extending in a direction perpendicular to the first direction;
the outline of the repeating unit is a quadrangle, the pixel area, the transparent area, the first transmission area and the second transmission area are respectively located in four corner areas of the quadrangle, the first transmission area and the second transmission area are located in an area where a diagonal line of the quadrangle passes, and the pixel area and the transparent area are located in an area where another diagonal line of the quadrangle passes.
10. The transparent display panel according to any one of claims 1 to 9, wherein the pixel region includes at least one pixel including a first electrode, a light-emitting layer on a side of the first electrode away from the substrate, and a plurality of second electrodes on a side of the light-emitting layer away from the first electrode;
the pixel region and the second electrode are arranged correspondingly, and the orthographic projection of the second electrode on the substrate covers the orthographic projection of the pixel region on the substrate.
11. The transparent display panel of claim 10, further comprising a routing layer between the first electrode and the base substrate;
the transparent display panel further includes: the second electrode lead is electrically connected with the second electrode through the lap electrode.
12. The transparent display panel of claim 11, wherein the transparent display panel comprises a first flat layer, a second flat layer, a pixel defining layer, a first inorganic encapsulation layer, an organic encapsulation layer, a second inorganic encapsulation layer, in that order, on a side of the pixel facing away from the substrate;
the transparent display panel further includes a blocking dam located at a periphery of the display region, the blocking dam including the first planarization layer, the second planarization layer, a groove structure formed by the pixel defining layer and having a recess toward one side of the second planarization layer, the first inorganic encapsulation layer, and the second inorganic encapsulation layer, which are stacked.
13. The transparent display panel of claim 11, further comprising at least one ring of anti-cracking dam located on a side of the blocking dam away from the display area, wherein the anti-cracking dam comprises a first metal portion on the same layer as the source and drain electrodes.
14. The transparent display panel of claim 13, further comprising a gate layer, an interlayer dielectric layer, a passivation layer between the substrate base plate and the first planarization layer;
the transparent display panel further comprises a panel crack detection line positioned between the blocking dam and the anti-cracking dam; the panel crack detection line comprises: a second metal portion on a same layer as the gate layer.
15. The transparent display panel of claim 14, wherein edges of the first and second inorganic encapsulation layers are located between the panel crack detection line and the anti-cracking dam.
16. The transparent display panel of claim 15, wherein the minimum distance between the panel crack detection line and the edge is greater than the minimum distance between the panel crack detection line and the barrier dam.
17. The transparent display panel of claim 15, further comprising a transparent cover plate on a side of the second inorganic encapsulation layer facing away from the organic encapsulation layer.
18. A display device comprising a plurality of the transparent display panels according to any one of claims 1 to 17, wherein the plurality of the transparent display panels are joined to each other.
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