CN114267685B - Display panel and display device - Google Patents
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- CN114267685B CN114267685B CN202111527032.3A CN202111527032A CN114267685B CN 114267685 B CN114267685 B CN 114267685B CN 202111527032 A CN202111527032 A CN 202111527032A CN 114267685 B CN114267685 B CN 114267685B
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- 239000000758 substrate Substances 0.000 claims description 37
- 239000010409 thin film Substances 0.000 claims description 35
- 125000006850 spacer group Chemical group 0.000 claims description 20
- 230000007704 transition Effects 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims 1
- 238000002834 transmittance Methods 0.000 abstract description 13
- 238000000059 patterning Methods 0.000 abstract description 10
- 239000010410 layer Substances 0.000 description 377
- 239000002184 metal Substances 0.000 description 30
- 229910052751 metal Inorganic materials 0.000 description 30
- 238000000034 method Methods 0.000 description 21
- 230000004888 barrier function Effects 0.000 description 11
- 239000010408 film Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000002161 passivation Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910019015 Mg-Ag Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
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- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a display panel and a display device. The display panel comprises a conventional display area, a functional display area adjacent to the conventional display area, a driving circuit layer, a first electrode layer, a light-emitting layer and a second electrode layer; the first electrode layer is arranged in the driving circuit layer; the luminescent layer sets up in one side of drive circuit layer, and the luminescent layer includes: a first light emitting pixel disposed in the functional display area and a second light emitting pixel disposed in the normal display area; the second electrode layer is arranged on one side of the light-emitting layer, which is far away from the driving circuit layer, and a light-transmitting opening positioned between adjacent first light-emitting pixels is arranged in the functional display area; wherein, the drive circuit layer corresponds the printing opacity open position, is provided with concave-convex structure towards one side of second electrode layer. The invention can improve the light transmittance in the functional display area, reduce the stress applied to the second electrode layer during patterning and improve the yield of the second electrode layer.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device having the same.
Background
With the increasing demand of consumers for screen ratio, an under-screen camera type Organic Light-Emitting Diode (OLED) display panel has become one of the mainstream designs in the field of OLED display panels.
For an under-screen camera, it is necessary to ensure that each film layer in the light-transmitting region directly above the camera has sufficient light transmittance. In conventional top-emitting OLED display panels, the cathode layer is typically a thin layer of a semi-transparent metal, such as Mg-Ag alloy, or the like, in view of the electron injection barrier. For a metal thin-layer cathode, the light transmittance of the cathode can be improved to a certain extent by reducing the thickness of the metal thin-layer cathode, but the light entering requirement of a camera is still difficult to meet.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which can improve the light transmittance of a functional display subarea, reduce the stress applied to the patterning of a second electrode layer and improve the yield of the display panel.
An embodiment of the present invention provides a display panel including a normal display area and a functional display area adjacent to the normal display area, the display panel further including:
a driving circuit layer;
a first electrode layer disposed in the driving circuit layer;
A light emitting layer disposed at one side of the driving circuit layer, the light emitting layer including: a first light emitting pixel disposed in the functional display area and a second light emitting pixel disposed in the normal display area;
a second electrode layer disposed on a side of the light emitting layer away from the driving circuit layer, the second electrode layer being provided with a light-transmitting opening between adjacent first light emitting pixels in the functional display region;
the driving circuit layer corresponds to the light-transmitting opening, and a concave-convex structure is arranged on one side, facing the second electrode layer.
In one embodiment of the present invention, the driving circuit layer includes:
and an organic spacer layer, corresponding to the position of the light-transmitting opening, and having a concave-convex structure facing one side of the second electrode layer.
In one embodiment of the present invention, the driving circuit layer includes:
an organic substrate layer;
a thin film transistor layer disposed on one side of the organic substrate layer;
the pixel definition layer is arranged on one side of the thin film transistor layer, which is far away from the organic substrate layer, and comprises a plurality of pixel openings corresponding to the first light-emitting pixels or the second light-emitting pixels;
The pixel definition layer corresponds to the light-transmitting opening, and a concave-convex structure is arranged on one side, facing the second electrode layer.
In one embodiment of the present invention, the driving circuit layer includes:
an organic substrate layer;
a thin film transistor layer disposed on one side of the organic substrate layer;
a pixel defining layer disposed on a side of the thin film transistor layer away from the organic substrate layer,
the driving circuit layer is provided with a groove corresponding to the position of the light-transmitting opening, the bottom surface of the groove extends to the organic substrate layer, the organic substrate layer corresponds to the position of the light-transmitting opening, and a concave-convex structure is arranged on one side, facing the second electrode layer.
In one embodiment of the present invention, the number of the first light emitting pixels is the same as the number of the second light emitting pixels in the same unit area.
In one embodiment of the invention, the functional display area comprises a light transmissive sub-area and a transition sub-area between the light transmissive sub-area and the conventional display area;
the driving circuit layer further comprises a shading layer, the shading layer comprises a plurality of first shading parts, a plurality of second shading parts and a third shading part, the first shading parts and the third shading parts are arranged around the plurality of first shading parts and the plurality of second shading parts, the second shading parts are connected between two adjacent first shading parts or between the first shading parts and the third shading parts, one first shading part corresponds to one first luminous pixel, and the third shading parts and the transition subareas are at least partially overlapped.
In one embodiment of the present invention, the second electrode layer is provided with the light-transmitting opening in the functional display region corresponding to a region surrounded by adjacent first light-shielding portions and second light-shielding portions, and/or corresponding to a region surrounded by adjacent first light-shielding portions, second light-shielding portions, and third light-shielding portions, the light-transmitting opening being non-overlapping with the light-shielding layer.
In one embodiment of the present invention, the second electrode layer includes a first sub-electrode disposed corresponding to the first light shielding portion and a second sub-electrode disposed corresponding to the second light shielding portion, and the adjacent first sub-electrode and second sub-electrode are disposed around the light transmitting opening;
wherein the shape of the first sub-electrode is the same as the shape of the first light shielding part, and the shape of the second sub-electrode is the same as the shape of the second light shielding part.
In one embodiment of the present invention, edges of the first light shielding portion, the second light shielding portion and the third light shielding portion are wavy or zigzag.
In one embodiment of the present invention, the second light shielding portion is curved.
In one embodiment of the present invention, the driving circuit layer further includes a first transistor disposed corresponding to the functional display area and a second transistor disposed corresponding to the normal display area;
The light shielding layer further includes fourth light shielding portions located in the normal display region and disposed corresponding to the second transistors, and the number of the first light shielding portions is the same as the number of the fourth light shielding portions in the same unit area.
In one embodiment of the present invention, the driving circuit layer further includes a first wire electrically connected to the first transistor and providing a driving signal to the first transistor, and a second wire connected between the first transistor and the first light emitting pixel;
and the second shading part is overlapped with the first wiring and/or the second wiring in the light-transmitting subarea.
In an embodiment of the invention, the first transistor is disposed in the transition sub-region, in the light-transmitting sub-region, the second light shielding portion is disposed overlapping the second wire, and a width of the second light shielding portion is greater than a width of the second wire.
In one embodiment of the present invention, the first trace is disposed around the edge of the light-transmitting sub-region in the transition sub-region, and the third light shielding portion is disposed at least partially overlapping the first trace disposed around the edge of the light-transmitting sub-region.
In an embodiment of the present invention, the first transistor is disposed in the light-transmitting sub-region, the first light shielding portion is disposed overlapping the first transistor, the second light shielding portion is disposed overlapping the first wiring, and a width of the second light shielding portion is greater than a width of the first wiring.
According to the above object of the present invention, there is provided a display device including the display panel, and a photosensitive element provided in correspondence with the functional display area of the display panel.
The invention has the beneficial effects that: according to the invention, the concave-convex structure positioned in the functional display area is arranged on one side of the driving circuit layer facing the second electrode layer, and the position of the second electrode layer corresponding to the concave-convex structure is provided with the light-transmitting opening, so that when the second electrode layer positioned on the concave-convex structure is peeled off in the process of forming the light-transmitting opening in the second electrode layer, the concave-convex structure can reduce the vertical stress born by the second electrode layer, reduce the height of the warping formed when the edge of the second electrode layer is peeled off, and further improve the yield of the display panel; the second electrode layer in the functional display area is subjected to patterning treatment so as to improve the light transmittance of the functional display area.
Drawings
The technical solution and other advantageous effects of the present invention will be made apparent by the following detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a structure of a light shielding layer in a functional display area of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another structure of a light shielding layer in a functional display area of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another structure of a light shielding layer in a functional display area of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second electrode layer in a functional display area of a display panel according to an embodiment of the present invention;
FIG. 7 is a schematic side view of a second electrode layer in a functional display area of a display panel according to an embodiment of the present invention;
fig. 8 is a schematic diagram of another structure of a display panel according to an embodiment of the invention;
FIG. 9 is a flowchart of a method for fabricating a display panel according to an embodiment of the present invention;
fig. 10 is a schematic view of a process structure in a light-transmitting area of a display panel according to an embodiment of the invention.
Detailed Description
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. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1, 2 and 3, the display panel includes a conventional display area 101, a functional display area 102 adjacent to the conventional display area 101, a driving circuit layer, a first electrode layer 61, a light emitting layer 63 and a second electrode layer 20.
Further, the first electrode layer 61 is disposed in the driving circuit layer, the light emitting layer 63 is disposed at one side of the driving circuit layer, and the second electrode layer 20 is disposed at one side of the light emitting layer 63 away from the driving circuit layer; and the light emitting layer 63 includes a first light emitting pixel 631 disposed in the functional display area 102 and a second light emitting pixel 632 disposed in the conventional display area 101; the second electrode layer is provided with light-transmitting openings 201 between adjacent first light-emitting pixels 631 in the functional display area 102.
Wherein, the side of the driving circuit layer facing the second electrode layer 20 is provided with a concave-convex structure 11 corresponding to the light-transmitting opening 201.
In the implementation and application process, the concave-convex structure 11 positioned in the functional display area 102 is arranged on one side of the driving circuit layer, facing the second electrode layer 20, and the position of the second electrode layer 20 corresponding to the concave-convex structure 11 is provided with the light-transmitting opening 201, so that when the second electrode layer 20 positioned on the concave-convex structure 11 is peeled off in the process of forming the light-transmitting opening 201 in the second electrode layer 20, the concave-convex structure 11 can reduce the vertical stress received by the second electrode layer 20, reduce the height of the warping formed when the edge of the second electrode layer 20 is peeled off, and further improve the yield of the display panel; and the second electrode layer 20 in the functional display area 102 is patterned to improve the light transmittance of the functional display area 102.
It should be noted that, in the embodiment of the present invention, the driving circuit layer includes the organic spacer layer 10, and the organic spacer layer 10 may be any organic film layer in the driving circuit layer, wherein the concave-convex structure 11 is disposed on a surface of the organic spacer layer 10 facing the second electrode layer 20, and the light-transmitting opening 201 may expose an upper surface of the concave-convex structure 11.
Specifically, in one embodiment of the present invention, please continue to refer to fig. 1, 2 and 3, the display panel includes a conventional display area 101 and a functional display area 102 adjacent to the conventional display area 101, and the functional display area 102 includes a transparent sub-area 1021 and a transition sub-area 1022 between the transparent sub-area 1021 and the conventional display area 101. The functional display area 102 may be used for a photosensitive device for placing a camera, and optionally, the shape of the functional display area 102 includes a circle, an ellipse, a square, or other polygons, which is not limited herein, and in the embodiment of the present invention, the functional display area 102 is illustrated as an ellipse, specifically, the light-transmitting sub-area 1021 is a circle, and the transition sub-area 1022 is an ellipse ring.
Further, the display panel includes a driving circuit layer, a light emitting layer 63 disposed on the driving circuit layer, and a second electrode layer 20. Specifically, the driving circuit layer includes an organic substrate layer 40, a thin film transistor layer 50 disposed on the organic substrate layer 40, a first electrode layer 61 disposed on the thin film transistor layer 50, and a pixel defining layer 70; and the light emitting layer 63 is disposed on the pixel defining layer 70, and the second electrode layer 20 is disposed on the light emitting layer 63 and the pixel defining layer 70.
In this embodiment, the pixel defining layer 70 is an organic spacer layer 10, the first electrode layer 61 may be an anode layer, and the second electrode layer 20 may be a cathode layer.
The organic substrate layer 40 includes at least one organic flexible sub-layer and at least one water-oxygen barrier sub-layer, which are stacked, and in this embodiment, two organic flexible sub-layers and two water-oxygen barrier sub-layers are taken as examples for illustration. Specifically, the organic substrate layer 40 includes a first organic flexible sublayer 41, a first water oxygen barrier sublayer 43, a second organic flexible sublayer 42, and a second water oxygen barrier sublayer 44, which are stacked.
The thin film transistor layer 50 includes a thin film transistor device 51 disposed on the organic substrate layer 40 and an insulating layer covering the thin film transistor device 51; further, the insulating layer includes a passivation layer 53, a first gate insulating layer 54, a second gate insulating layer 55, and an interlayer insulating layer 56 sequentially disposed on the organic substrate layer 40; the thin film transistor device 51 includes an active layer disposed on the organic substrate layer 40 and covered by the passivation layer 53, a first gate electrode disposed on the passivation layer 53 and covered by the first gate insulating layer 54, a second gate electrode disposed on the first gate insulating layer 54 and covered by the second gate insulating layer 55, and a source and drain electrode disposed on the second gate insulating layer 55 and covered by the interlayer insulating layer 56.
In this embodiment, the display panel further includes a light shielding layer 30 disposed in the driving circuit layer, where the light shielding layer 30 is disposed in the organic substrate layer 40 and may be located on any one of the organic flexible sublayers or any one of the water-oxygen barrier sublayers in the organic substrate layer 40, and in this embodiment, the light shielding layer 30 is disposed between the second organic flexible sublayers 42 and the second water-oxygen barrier sublayers 44 by taking the light shielding layer 30 disposed on the second organic flexible sublayers 42 as an example. Specifically, the light shielding layer 30 includes a plurality of first light shielding portions 31, a plurality of second light shielding portions 32, and a third light shielding portion 33 provided in the functional display area 102, and a fourth light shielding portion 34 located in the normal display area 101; a second light shielding portion 32 is disposed between any two adjacent first light shielding portions 31, the third light shielding portion 33 is disposed around the first light shielding portions 31 and the second light shielding portions 32, the first light shielding portions 31 and the second light shielding portions 32 are disposed in the light-transmitting sub-area 1021, and the third light shielding portion 33 is disposed around the light-transmitting sub-area 1021 and at least partially overlaps the transition sub-area 1022.
In the embodiment of the invention, the thin film transistor device 51 includes a first transistor corresponding to the functional display area 102 and a second transistor corresponding to the normal display area 101, wherein the light shielding layer 30 further includes a fourth light shielding portion 34 disposed in the normal display area 101, and each second transistor is correspondingly disposed with a fourth light shielding portion 34, and the fourth light shielding portion 34 is disposed under the second transistor, so as to play a role of shielding light to prevent the thin film transistor device 51 from being irradiated by ambient light, and the thin film transistor layer 50 further includes a conducting portion 52 connected to the fourth light shielding portion 34, wherein the conducting portion 52 can load a voltage signal in any layer of the thin film transistor layer 50 into the fourth light shielding portion 34, so as to improve the damage of the electrostatic phenomenon to the second transistor.
Optionally, the material of the light shielding layer 30 includes a metal material such as Al, pt, pd, ag, mo, li, W, and the thickness of the light shielding layer 30 isTo->
The pixel defining layer 70 is disposed on the thin film transistor layer 50, and the pixel defining layer 70 is formed with a plurality of pixel openings 701, wherein the plurality of pixel openings 701 can be located in the conventional display area 101 and the transparent sub-area 1021.
The shape of the pixel openings 701 in the transparent sub-area 1021 may be the same as or different from the shape of the pixel openings 701 in the conventional display area 101, and the number of the pixel openings in the transparent sub-area 1021 is the same as the number of the pixel openings in the conventional display area 101 in the same unit area.
Further, the display panel further includes a first electrode layer 61, a light emitting layer 63, and a common layer 62, the first electrode layer 61 is disposed on the interlayer insulating layer 56 and is disposed corresponding to the pixel openings 701, the common layer 62 includes a first common layer 621 and a second common layer 622 disposed on the pixel defining layer 70 and covering the plurality of pixel openings 701, the light emitting layer 63 includes light emitting pixels disposed in each pixel opening 701 and between the first common layer 621 and the second common layer 622, and the light emitting pixels include a first light emitting pixel 631 in the light transmitting sub-region 1021 and a second light emitting pixel 632 in the conventional display region 101. It is understood that the first common layer 621 may include a hole injection layer and a hole transport layer, and the second common layer 622 may include an electron injection layer and an electron transport layer.
In the embodiment of the present invention, the first transistor is electrically connected to the first light emitting pixel 631, the second transistor is electrically connected to the second light emitting pixel 632, so as to transmit electrical signals to the first light emitting pixel 631 and the second light emitting pixel 632, respectively, and each first light shielding portion 31 is corresponding to one first light emitting pixel 631, each fourth light shielding portion 34 is corresponding to one second transistor, that is, each fourth light shielding portion 34 is corresponding to one second light emitting pixel 632, so that the number of the first light shielding portions 31 is the same as the number of the fourth light shielding portions 34 in the same unit area.
Further, the thin film transistor layer 50 further includes a first wire electrically connected to the first transistor and providing a driving signal, and a second wire connected between the first transistor and the first light emitting pixel 631. In the transparent sub-region 1021, the second light shielding portion 32 is disposed overlapping the first trace and/or the second trace.
Specifically, when the first transistor is disposed in the transition sub-region 1022, in the transparent sub-region 1021, the second light shielding portion 32 is disposed overlapping the second wiring, and the width of the second light shielding portion 32 is greater than the width of the second wiring, and in this embodiment, the first transistor may be disposed in the transition sub-region 1022, so that no transistor device is required to be disposed in the transparent sub-region 1021, and the light transmittance of the transparent sub-region 1021 may be further improved.
In addition, the first trace is disposed around the edge of the transparent sub-region 1021 in the transition sub-region 1022, and the third light shielding portion 33 is disposed at least partially overlapping the first trace disposed around the edge of the transparent sub-region 1021.
When the first transistors are disposed in the transparent sub-region 1021, each first transistor is disposed overlapping with a first light shielding portion 31, and the second light shielding portion 32 is disposed overlapping with the first wiring, and the width of the second light shielding portion 32 is greater than the width of the first wiring.
The second electrode layer 20 is disposed on the light emitting layer 63 and covers a side of the second common layer 622 away from the first common layer 621, in this embodiment, the second electrode layer 20 is formed with a light-transmitting opening 201 in the functional display area 102 corresponding to a region surrounded by the adjacent first light shielding portion 31 and second light shielding portion 32 and a region surrounded by the adjacent first light shielding portion 31, second light shielding portion 32 and third light shielding portion 33, that is, the light-transmitting opening 201 is not overlapped with the light shielding layer 30. Further, the second electrode layer 20 includes a plurality of first sub-electrodes 21 located in the light-transmitting sub-area 1021, a second sub-electrode 22 connected between any two adjacent first sub-electrodes 21, and a third sub-electrode 23 located in the conventional display area 101 and covering the second common layer 622 entirely, and in this embodiment, the second electrode layer 20 located in the functional display area 102 is patterned to form a light-transmitting opening 201, so as to improve the light transmittance of the second electrode layer 20 in the functional display area 102, and further meet the light-transmitting requirement of the functional display area 102.
In addition, the pixel defining layer 70 is provided with a concave-convex structure 11 on a side facing the second electrode layer 20, the concave-convex structure 11 is located in the light-transmitting sub-region 1021, and the light-transmitting opening 201 exposes the concave-convex structure 11, which is staggered with the first sub-electrodes 21 and the second sub-electrodes 22. In the process of patterning the second electrode layer 20 to form the light-transmitting opening 201, a laser lift-off method is often adopted for preparation, but in the embodiment of the present invention, the concave-convex structure 11 is disposed in the area (i.e. the light-transmitting sub-area 1021) where the second electrode layer 20 needs to be lifted off, so that the vertical stress applied to the second electrode layer 20 in the lift-off process can be reduced, and the patterned yield of the second electrode layer 20 can be improved.
Alternatively, the concave-convex structure 11 may be a plurality of protrusions formed on the surface of the organic spacer layer 10, and the protrusions may be spaced apart or connected, and the cross-sectional shape of each protrusion may be arc-shaped such that the concave-convex structure has a wave-shaped structure.
Further, in the embodiment of the present invention, the light shielding layer 30 includes a plurality of first light shielding portions 31 and a plurality of second light shielding portions 32 located in the functional display area 102 and a third light shielding portion 33 disposed around the plurality of first light shielding portions 31 and the plurality of second light shielding portions 32, wherein each first sub-electrode 21 is disposed on a corresponding one of the first light shielding portions 31, and each second sub-electrode 22 is disposed on a corresponding one of the second light shielding portions 32, that is, in the process, the embodiment of the present invention uses the first light shielding portions 31, the second light shielding portions 32 and the third light shielding portions 33 as mask plates to perform patterning treatment on the second electrode layer 20.
The orthographic projection of each first sub-electrode 21 on the light shielding layer 30 is located within the coverage of the corresponding first light shielding portion 31, and the orthographic projection of each second sub-electrode 22 on the light shielding layer 30 is located within the coverage of the corresponding second light shielding portion, that is, the area of each first sub-electrode 21 is smaller than the area of the corresponding first light shielding portion 31, and the area of each second sub-electrode 22 is smaller than the area of the corresponding second light shielding portion. The shape of the front projection of each first sub-electrode 21 on the light shielding layer 30 is the same as the shape of the corresponding first light shielding portion 31, and the shape of the front projection of each second sub-electrode 22 on the light shielding layer 30 is the same as the shape of the corresponding second light shielding portion 32, as shown in fig. 4 and 6.
The width of each second light shielding portion 32 is larger than the width of the corresponding second sub-electrode 22, and is at least more than 2 micrometers to prevent the laser light from damaging the second sub-electrode 22. In addition, in the embodiment of the present invention, in order to increase the light transmittance in the functional display area 102, the first transistor and the first trace corresponding to the first light emitting pixel 631 in the functional display area 102 are disposed in the transition sub-area 1022, the first trace may be disposed around the light transmitting sub-area 1021, the first transistor and the first light emitting pixel 631 are connected by the second trace, the third light shielding portion 33 includes an inner boundary near one side of the functional display area 102, the orthographic projection of the first trace on the light shielding layer 30 is located at one side of the inner boundary of the third light shielding portion 33 far from the functional display area 102, and the second trace overlaps the second light shielding portion 32 in the functional display area 102, and the width of the second trace is smaller than the width of the second light shielding portion 32, so as to prevent the laser from damaging the first trace, the second trace and the first transistor.
Optionally, the distance of orthographic projection of the first trace on the light shielding layer 30 to the inner boundary of the third light shielding portion 33 is greater than or equal to 1 micrometer.
In the embodiment of the present invention, the first light shielding portion 31, the second light shielding portion 32 and the third light shielding portion 33 surrounding the functional display area 102 are disposed in the light shielding layer 30, and the first light shielding portion 31 and the second light shielding portion 32 are disposed in the light transmitting sub-area 1021, so that the light shielding layer 30 can be directly used as a mask plate in the process of patterning the second electrode layer 20 by laser lift-off, so as to remove the second electrode layer 20 in the light transmitting sub-area 1021, which is not blocked by the first light shielding portion 31 and the second light shielding portion 32, and improve the light transmittance in the functional display area 102; further, in the embodiment of the present invention, the pixel defining layer 70 forms the concave-convex structure 11 in the light-transmitting sub-region 1021, so as to reduce the vertical stress applied to the second electrode layer 20 during the peeling process, and improve the patterned yield of the second electrode layer 20.
Alternatively, each of the second light shielding portions 32 may be arranged in a curved manner, as shown in fig. 4, since the shape of the second sub-electrode 22 is the same as that of the second light shielding portion 32, each of the second sub-electrodes 22 may also be arranged in a curved manner, so as to reduce diffraction of the second sub-electrode 22 on light and improve light emitting and light transmitting effects in the functional display area 102.
Optionally, the edges of the first light shielding portion 31, the second light shielding portion 32 and the third light shielding portion 33 are all zigzag, as shown in fig. 5, the edges of the first sub-electrode 21, the second sub-electrode 22 and the third sub-electrode 23 are all zigzag, so as to further reduce the diffraction of the second electrode layer 20 on the light in the functional display area 102, and further improve the light emitting and light transmitting effects in the functional display area 102; alternatively, the edges of the first light shielding portion 31, the second light shielding portion 32, and the third light shielding portion 33 may also be wavy.
Further, since the concave-convex structure 11 is formed at the position of the pixel defining layer 70 corresponding to the light-transmitting sub-area 1021 in the embodiment of the present invention, the vertical stress applied to the second electrode layer 20 during the patterning process can be reduced, so that the height of the edge of the second electrode layer 20 for forming the warpage can be reduced, as shown in fig. 7, the edge of the second electrode layer 20 (which may include the first sub-electrode 21, the second sub-electrode 22 and the third sub-electrode 23) is formed with the convex portion 201, and the convex portion 201 is disposed on the side of the second electrode layer 20 away from the organic spacer layer 10.
In another embodiment of the present invention, referring to fig. 8, the difference between the present embodiment and the previous embodiment is that the organic spacer layer 10 is an organic flexible sub-layer in the organic substrate layer 40.
In this embodiment, the organic spacer layer 10 is a second organic flexible sublayer 42, the light shielding layer 30 is disposed on the first organic flexible sublayer 41 and the water-oxygen blocking sublayer 43, and the concave-convex structure 11 is formed on the surface of the second organic flexible sublayer 42 away from the first organic flexible sublayer 41 and is located in the light-transmitting sub-region 1021. Further, the distance from the concave-convex structure 11 to the second electrode layer 20 along the first direction is smaller than or equal to the distance from the light shielding layer 30 to the second electrode layer 20 along the first direction, wherein the first direction is the thickness direction of the display panel, so that the light shielding layer 30 can be used as a mask plate in the patterning process of the second electrode layer 20.
In addition, the display panel further includes a plurality of grooves 501 disposed in the transparent sub-region 1021, and in this embodiment, each groove 501 passes through the second electrode layer 20, the pixel defining layer 70 and the thin film transistor layer 50 to expose the upper surface of the second organic flexible sub-layer 42, i.e. the concave-convex structure 11 is disposed at the bottom of the groove 501.
In this embodiment, the front projection of the second electrode layer 20 on the organic spacer layer 10 is staggered from the front projection of the plurality of grooves 501 on the organic spacer layer 10.
In this embodiment, the light transmission sub-area 1021 is grooved, so that the light transmittance in the light transmission sub-area 1021 is further improved compared with that in the previous embodiment; similarly, in the present embodiment, the organic spacer layer 10 forms the concave-convex structure 11 in the light-transmitting sub-region 1021, so as to reduce the vertical stress applied to the second electrode layer 20 during the peeling process, thereby improving the patterned yield of the second electrode layer 20.
It should be noted that the organic spacer layer 10 may be any organic film layer of the second electrode layer 20 and the organic substrate layer 40, and a trench may be formed between the organic film layer and the second electrode layer 20, so that the second electrode layer 20 may cover the organic spacer layer 10 in the process.
In the embodiment of the present invention, the light-transmitting sub-area 1021 occupies 70% to 90% of the functional display area 102, and the light transmittance of the functional display area 102 can be improved by 30% to 60%.
In addition, an embodiment of the present invention further provides a method for manufacturing the display panel in the foregoing embodiment, referring to fig. 1, fig. 2, fig. 3, fig. 9, and fig. 10, the display panel includes a normal display area 101 and a functional display area 102 adjacent to the normal display area 101.
The manufacturing method of the display panel comprises the following steps:
S10, forming a driving circuit layer, wherein the concave-convex structure 11 positioned in the functional display area 102 is formed on the driving circuit layer.
S20, forming a light emitting layer 63 on one side of the driving circuit layer, the light emitting layer 63 including: a first light emitting pixel 631 formed in the functional display area 102 and a second light emitting pixel 632 formed in the conventional display area 101.
S30, forming a second electrode layer 20 on a side of the light emitting layer 63 away from the driving circuit layer, where the second electrode layer 20 is formed with a light-transmitting opening 201 between adjacent first light emitting pixels 631 and corresponding to the concave-convex structure 11 in the functional display area 102.
Specifically, in one embodiment of the present invention, please continue to refer to fig. 1, 2, 3, 9 and 10.
Providing an organic substrate layer 40, the organic substrate layer 40 comprising a laminated first organic flexible sublayer 41, a first water oxygen barrier sublayer 43, a second organic flexible sublayer 42 and a second water oxygen barrier sublayer 44; wherein the organic substrate layer 40 has formed therein a light shielding layer 30 between a second organic flexible sublayer 42 and a second water oxygen barrier sublayer 44.
The light shielding layer 30 includes a first light shielding portion 31, a second light shielding portion 32, a third light shielding portion 33 and a fourth light shielding portion 34, wherein the first light shielding portion 31 and the second light shielding portion 32 are located in the light-transmitting sub-area 1021, the third light shielding portion 33 is disposed around the light-transmitting sub-area 1021, and the fourth light shielding portion 34 is located in the normal display area 101.
Optionally, the material of the light shielding layer 30 includes a metal material such as Al, pt, pd, ag, mo, li, W, and the thickness of the light shielding layer 30 isTo->
Forming a thin film transistor layer 50 on the organic substrate layer 40, the thin film transistor layer 50 including a thin film transistor device 51 disposed on the organic substrate layer 40 and an insulating layer covering the thin film transistor device 51; further, the insulating layer includes a passivation layer 53, a first gate insulating layer 54, a second gate insulating layer 55, and an interlayer insulating layer 56 sequentially disposed on the organic substrate layer 40; the thin film transistor device 51 includes an active layer disposed on the organic substrate layer 40 and covered by the passivation layer 53, a first gate electrode disposed on the passivation layer 53 and covered by the first gate insulating layer 54, a second gate electrode disposed on the first gate insulating layer 54 and covered by the second gate insulating layer 55, and a source and drain electrode disposed on the second gate insulating layer 55 and covered by the interlayer insulating layer 56.
It should be noted that, in the embodiment of the present invention, the thin film transistor device 51 includes a first transistor corresponding to the functional display area 102 and a second transistor corresponding to the conventional display area 101, where the light shielding layer 30 further includes a fourth light shielding portion 34 disposed in the conventional display area 101, and each of the second transistors is correspondingly disposed with a fourth light shielding portion 34, and the fourth light shielding portion 34 is disposed below the second transistor, so as to play a role of shielding light to prevent the thin film transistor device 51 from being irradiated by ambient light, and the thin film transistor layer 50 further includes a conducting portion 52 connected to the third light shielding portion 33, where the conducting portion 52 can load a voltage signal in any layer of the thin film transistor layer 50 into the fourth light shielding portion 34 to improve the damage of the thin film transistor device 51 caused by the electrostatic phenomenon.
A plurality of first electrode layers 61 are formed on the thin film transistor layer 50, and the plurality of first electrode layers 61 may be located within the light-transmitting sub-region 1021 and within the conventional display region 101.
An organic spacer layer 10 (i.e., a pixel defining layer 70) is formed on the thin film transistor layer 50 and the plurality of first electrode layers 61, a plurality of pixel openings 701 are formed in the pixel defining layer 70 and are located in the transparent sub-regions 1021 and the normal display region 101, and a concave-convex structure 11 is formed in the transparent sub-regions 1021, wherein each pixel opening 701 correspondingly exposes an upper surface of the first electrode layer 61, and the concave-convex structure 11 is staggered with each pixel opening 701.
It should be noted that, the concave-convex structure 11 may be prepared by using a semi-transparent mask plate in the process.
A patterned metal sacrificial layer 12 is formed on the pixel defining layer 70 to form a metal sacrificial layer 12 located in the light-transmitting sub-region 1021 and located on the concave-convex structure 11, and the metal sacrificial layer 12 is conformally disposed on the concave-convex structure 11, i.e. the metal sacrificial layer 12 is disposed in contact with the concave-convex structure 11, and a concave-convex film layer is also formed.
Optionally, the material of the metal sacrificial layer 12 includes a metal material such as Al, pt, pd, ag, mo, li, W, and the thickness of the metal sacrificial layer 12 can be To->
The common layer 62 and the light emitting layer 63 are formed on the metal sacrificial layer 12 and the pixel defining layer 70, and the common layer 62 includes a first common layer 621 and a second common layer 622, then a metal electrode layer is formed on the second common layer 622, and on the second common layer 622, the common layer 62 and the metal electrode layer are conformally disposed on the metal sacrificial layer 12, and further a concave-convex film morphology is also formed on the common layer 62 and the metal electrode layer.
At the side of the organic substrate layer 40 far from the thin film transistor layer 50, a laser is used to irradiate the functional display area 102, specifically, a light-transmitting sub-area 1021, and the light shielding layer 30 is used as a mask plate, and laser is irradiated onto the metal sacrificial layer 12 from the area not covered by the light shielding layer 30, so that the metal sacrificial layer 12, the common layer 62 and the metal electrode layer on the metal sacrificial layer 12 are stripped, and a second electrode layer 20 patterned in the functional display area 102 is obtained, wherein the second electrode layer comprises a plurality of first sub-electrodes 21 in the light-transmitting sub-area 1021 and a second sub-electrode 22 connected between any two adjacent first sub-electrodes 21.
It can be understood that the laser energy cannot be low, otherwise, the metal electrode layer is not completely stripped, residues exist, and the laser energy cannot be too high, otherwise, the second electrode layer 20 and other film layers below the second electrode layer 20 are damaged, meanwhile, the edge of the film layer is curled in a large area due to the thermal effect caused by the too high energy, and even most of the film layer is torn, so that the second electrode layer 20 in an unirradiated area is affected, and further, the subsequent packaging failure and abnormal display are caused.
In the transparent sub-region 1021, as shown in fig. 10, the stacked structure of the organic spacer layer 10, the metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 is shown, since the peeled metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 are located on the concave-convex structure 11, and the metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 are also formed with concave-convex film morphology on the concave-convex structure 11, the vertical stress applied when the metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 are peeled can be reduced, so as to improve the yield in the patterning process of the second electrode layer 20.
In another embodiment of the present invention, please refer to fig. 1, 3, 8, 9 and 10, which are different from the previous embodiment in that the organic spacer layer 10 is a second organic flexible sub-layer 42 in the organic substrate layer 40, i.e. the concave-convex structure 11 can be fabricated on the second organic flexible sub-layer 42 by using a semi-transparent mask.
After forming the pixel defining layer 70, a groove 501 penetrating the pixel defining layer 70, the thin film transistor layer 50 and the second water oxygen barrier sub-layer 44 may be formed in the light-transmitting sub-region 1021 to expose the upper surface of the second organic flexible sub-layer 42, i.e. to expose the relief structure 11.
And subsequently, according to the above embodiment, the common layer 62, the light emitting layer 63 and the metal electrode layer are formed on the pixel defining layer 70, and then the functional display area 102 is irradiated with laser light to strip the metal sacrificial layer 12 in the light-transmitting sub-area 1021 and the common layer 62 and the metal electrode layer on the metal sacrificial layer 12, so as to obtain the patterned second electrode layer 20 in the functional display area 102, wherein the patterned second electrode layer includes a plurality of first sub-electrodes 21 in the light-transmitting sub-area 1021 and the second sub-electrodes 22 connected between any two adjacent first sub-electrodes 21.
In the transparent sub-region 1021, as shown in fig. 10, the stacked structure of the organic spacer layer 10, the metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 is shown, since the peeled metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 are located on the concave-convex structure 11, and the metal sacrificial layer 12, the common layer 62 and the second electrode layer 20 are also formed with concave-convex film morphology on the concave-convex structure 11, the vertical stress applied when the second electrode layer 20 is peeled can be reduced, so as to improve the yield in the patterning process of the second electrode layer 20.
In addition, the embodiment of the invention also provides a display device, which comprises the display panel and the photosensitive element, wherein the photosensitive element is arranged corresponding to the functional display area 102 of the display panel; optionally, the photosensitive element may include a camera component, a fingerprint identification component, an infrared component, and the like, and the display panel provided by the embodiment of the invention can effectively improve the light transmittance of the functional display area 102, so that the photosensitive effect of the photosensitive element can be effectively improved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The display panel and the display device provided by the embodiments of the present invention are described in detail, and specific examples are applied to illustrate the principles and the embodiments of the present invention, and the description of the above embodiments is only used to help understand the technical solution and the core idea of the present invention; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (15)
1. A display panel comprising a regular display region and a functional display region adjoining the regular display region, the functional display region comprising a light transmissive sub-region and a transition sub-region between the light transmissive sub-region and the regular display region, the display panel further comprising:
the driving circuit layer comprises a shading layer, the shading layer comprises a plurality of first shading parts, a plurality of second shading parts and a third shading part, the first shading parts and the second shading parts are arranged in the functional display area, the third shading parts are arranged around the first shading parts and the second shading parts, the second shading parts are connected between two adjacent first shading parts or between the first shading parts and the third shading parts, and the third shading parts and the transition subareas are at least partially overlapped;
A first electrode layer disposed in the driving circuit layer;
a light emitting layer disposed at one side of the driving circuit layer, the light emitting layer including: the first light-shielding part is arranged corresponding to one first light-emitting pixel;
a second electrode layer disposed on a side of the light emitting layer away from the driving circuit layer, the second electrode layer being provided with a light-transmitting opening between adjacent first light emitting pixels in the functional display region;
the driving circuit layer corresponds to the light-transmitting opening, and a concave-convex structure is arranged on one side, facing the second electrode layer.
2. The display panel according to claim 1, wherein the driving circuit layer includes:
and the organic spacer layer is provided with the concave-convex structure at one side facing the second electrode layer corresponding to the position of the light-transmitting opening.
3. The display panel according to claim 2, wherein the driving circuit layer includes:
an organic substrate layer;
a thin film transistor layer disposed on one side of the organic substrate layer;
the pixel definition layer is arranged on one side of the thin film transistor layer, which is far away from the organic substrate layer, and comprises a plurality of pixel openings corresponding to the first light-emitting pixels or the second light-emitting pixels;
The pixel definition layer is the organic isolation layer, and the concave-convex structure is arranged on one side, facing the second electrode layer, of the pixel definition layer, corresponding to the position of the light-transmitting opening.
4. The display panel according to claim 2, wherein the driving circuit layer includes:
an organic substrate layer;
a thin film transistor layer disposed on one side of the organic substrate layer;
a pixel defining layer disposed on a side of the thin film transistor layer away from the organic substrate layer,
the organic spacer layer is an organic flexible sublayer in the organic substrate layer, the driving circuit layer is provided with a groove corresponding to the position of the light-transmitting opening, the bottom surface of the groove extends to the organic substrate layer, the organic substrate layer corresponds to the position of the light-transmitting opening, and the concave-convex structure is arranged towards one side of the second electrode layer.
5. The display panel according to claim 1, wherein the number of the first light emitting pixels is the same as the number of the second light emitting pixels in the same unit area.
6. The display panel according to claim 1, wherein the second electrode layer is provided with the light-transmitting opening in the functional display region corresponding to a region surrounded by adjacent first light-shielding portions and second light-shielding portions, and/or corresponding to a region surrounded by adjacent first light-shielding portions, second light-shielding portions, and third light-shielding portions, the light-transmitting opening being non-overlapping with the light-shielding layer.
7. The display panel according to claim 6, wherein the second electrode layer includes a first sub-electrode provided corresponding to the first light shielding portion and a second sub-electrode provided corresponding to the second light shielding portion, and the adjacent first sub-electrode and second sub-electrode are provided around the light transmitting opening;
wherein the shape of the first sub-electrode is the same as the shape of the first light shielding part, and the shape of the second sub-electrode is the same as the shape of the second light shielding part.
8. The display panel according to claim 6, wherein edges of the first light shielding portion, the second light shielding portion, and the third light shielding portion are wavy or zigzag.
9. The display panel according to claim 6, wherein the second light shielding portion has a curved shape.
10. The display panel according to claim 1, wherein the driving circuit layer further includes a first transistor provided corresponding to the functional display region and a second transistor provided corresponding to the normal display region;
the light shielding layer further includes fourth light shielding portions located in the normal display region and disposed corresponding to the second transistors, and the number of the first light shielding portions is the same as the number of the fourth light shielding portions in the same unit area.
11. The display panel of claim 10, wherein the driving circuit layer further comprises a first trace electrically connected to the first transistor and providing a driving signal to the first transistor, a second trace connected between the first transistor and the first light emitting pixel;
and the second shading part is overlapped with the first wiring and/or the second wiring in the light-transmitting subarea.
12. The display panel according to claim 11, wherein the first transistor is disposed in the transition sub-region, the second light shielding portion is disposed overlapping the second trace in the light-transmitting sub-region, and a width of the second light shielding portion is greater than a width of the second trace.
13. The display panel of claim 12, wherein the first trace is disposed around the edge of the light-transmissive sub-region in the transition sub-region, and the third light-shielding portion is disposed at least partially overlapping the first trace disposed around the edge of the light-transmissive sub-region.
14. The display panel according to claim 11, wherein the first transistor is disposed in the light-transmitting sub-region, the first light shielding portion is disposed overlapping the first transistor, the second light shielding portion is disposed overlapping the first wiring, and a width of the second light shielding portion is larger than a width of the first wiring.
15. A display device comprising the display panel according to any one of claims 1 to 14, and a photosensitive element provided in correspondence with the functional display area of the display panel.
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| CN202111527032.3A CN114267685B (en) | 2021-12-14 | 2021-12-14 | Display panel and display device |
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| CN115000146A (en) * | 2022-06-29 | 2022-09-02 | 云谷（固安）科技有限公司 | Display panel, display device and preparation method of display panel |
| CN115148933A (en) * | 2022-06-30 | 2022-10-04 | 武汉天马微电子有限公司 | Display panel, preparation method thereof and display device |
| CN115274799A (en) * | 2022-07-26 | 2022-11-01 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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