CN113793855A - Display substrate, manufacturing method thereof and display device - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- H01L27/1214—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 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1248—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 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
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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
- H01L27/1214—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 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
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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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- 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
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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Abstract
The invention provides a display substrate, a manufacturing method thereof and a display device, wherein the display substrate comprises: a drive back plate comprising: an effective pixel region and a virtual pixel region; a first electrode positioned in the effective pixel region and the dummy pixel region; the first pixel definition layer is positioned in the effective pixel area and defines a plurality of opening areas, the opening areas correspond to the first electrodes in the effective pixel area one by one, and at least part of the first electrodes in the effective pixel area are exposed out of the opening areas; the first insulating layer is positioned in the virtual pixel area and covers the first electrodes in the virtual pixel area, and for a single first electrode, the area of the first electrode covered by the first insulating layer is larger than that of the first electrode covered by the first pixel defining layer; the light emitting layer is arranged on one side, away from the driving backboard, of the first pixel defining layer and the first insulating layer; the second electrode is arranged on one side of the light-emitting layer far away from the driving backboard. The invention can avoid light leakage of the virtual pixel region and improve the yield of products.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display substrate, a manufacturing method of the display substrate and a display device.
Background
An effective functional area (function AA) of a silicon-based OLED (Organic Light-Emitting Diode) display substrate includes an effective pixel area and a dummy pixel area located at a periphery of the effective pixel area, wherein the dummy pixel area has a meaning that: since the PPI (pixel density) of the silicon-based OLED is high (up to 5644), the open mask can only be used to evaporate the EL (emitting layer) material. In the process that the EL material is fallen on the silicon substrate through an open mask opening (the shape and the area of the opening are consistent with those of an effective functional area), the thickness of the EL film at the edge of the opening is different from that of the EL film at the center of the opening due to the shadow (shadow) effect of an open mask, and the virtual pixel area aims to ensure the coating uniformity of the effective pixel area.
The virtual pixel area and the effective pixel area are configured in a same way, and each virtual pixel area is provided with an anode, an optical layer and a cathode, and a potential difference exists between the cathode and the anode. When the effective pixel area is lighted, the virtual pixel area also emits light, and the light rays bring serious negative influence to the user experience of the silicon-based OLED.
In order to solve the above problems, the prior art adopts passive improvement measures, which are: BM (black matrix) or frame (formed by overlapping RB two color films or RGB three color films) is adopted for shielding, but as the brightness of the silicon-based OLED is continuously improved (reaching 5000nit at present), the current BM or frame is more and more difficult to shield the light emitted from the virtual pixel region, so that the light leakage occurs in the virtual pixel region of the silicon-based OLED, and the product yield is seriously influenced.
Disclosure of Invention
The embodiment of the invention provides a display substrate, a manufacturing method thereof and a display device, which are used for solving the problem that the yield of products is greatly reduced due to light leakage of a virtual pixel area of an existing silicon-based OLED.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a display substrate, including:
a drive backplate, the drive backplate comprising: an effective pixel region and a virtual pixel region;
the first electrode is arranged on the driving backboard and is positioned in the effective pixel area and the virtual pixel area;
the first pixel defining layer is positioned in the effective pixel area and defines a plurality of opening areas, the opening areas correspond to the first electrodes in the effective pixel area in a one-to-one mode, and at least part of the first electrodes in the effective pixel area are exposed out of the opening areas;
a first insulating layer located in the dummy pixel region, the first insulating layer covering the first electrodes in the dummy pixel region, an area of the first electrodes covered by the first insulating layer being larger than an area of the first electrodes covered by the first pixel defining layer for a single first electrode;
the light emitting layer is arranged on one side, away from the driving backboard, of the first pixel defining layer and the first insulating layer and is positioned in the effective pixel area and the virtual pixel area;
and the second electrode is arranged on one side of the light-emitting layer, which is far away from the driving backboard, and is positioned in the effective pixel area and the virtual pixel area.
Optionally, the first insulating layer and the first pixel defining layer are disposed in the same material layer.
Optionally, the first insulating layer covers the entire area of the dummy pixel region.
Optionally, the effective pixel region includes an effective display region, and the virtual pixel region is located around the effective display region.
Optionally, the effective pixel region further includes: an offset pixel region between the effective display region and the virtual pixel region.
Optionally, the effective pixel region further includes: the sensing area is positioned on one side of the effective display area.
Optionally, the virtual pixel region is further included between the sensing region and the active display region.
Optionally, an area of the first electrode covered by the first insulating layer is larger than an area of the first electrode in the sensing region covered by the first pixel defining layer.
Optionally, an orthographic projection total area of the first insulating layer in the virtual pixel region on the driving backplane is larger than a total area of the first pixel defining layer in the sensing region.
Optionally, the driving backplane is a silicon-based driving backplane.
Optionally, the display substrate further includes:
the second insulating layer is arranged on the driving back plate and is positioned on one side, close to the driving back plate, of the first electrode;
the metal wiring layer is arranged on the driving back plate and is positioned on one side, away from the driving back plate, of the second insulating layer;
the third insulating layer is arranged on the driving back plate and is positioned between the metal wiring layer and the first electrode;
the first electrode is connected with the metal wiring layer through a via hole in the third insulating layer, and the metal wiring layer is connected with the driving back plate through a via hole in the second insulating layer.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a display substrate, including:
providing a driving back plate, the driving back plate comprising: an effective pixel region and a virtual pixel region;
forming a first electrode in an effective pixel area and a virtual pixel area of the driving backboard;
forming a first pixel defining layer in an effective pixel area of the driving backboard, forming a first insulating layer in a virtual pixel area of the driving backboard, wherein the first pixel defining layer defines a plurality of opening areas, the opening areas correspond to the first electrodes in the effective pixel area one by one, the first electrodes in the effective pixel area are at least partially exposed out of the opening areas, the first insulating layer covers the first electrodes in the virtual pixel area, and for a single first electrode, the area of the first insulating layer covering the first electrodes is larger than the area of the first electrodes covered by the first pixel defining layer;
forming light emitting layers in the effective pixel area and the virtual pixel area of the driving backboard;
and forming a second electrode in the effective pixel area and the virtual pixel area of the driving backboard.
In a third aspect, an embodiment of the present invention provides a display device, including the display substrate described in the first aspect.
In the embodiment of the invention, the first electrode in the virtual pixel area is covered by the insulating layer, so that the first electrode and the second electrode in the virtual pixel area are disconnected, the light emitting layer in the virtual pixel area cannot emit light, the light leakage of the virtual pixel area is avoided, and the product yield is improved. In addition, BM or frame materials and coating processes thereof can be omitted, production cost is reduced, and production line capacity is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a display substrate according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating a region division of a display substrate according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a display substrate according to yet another 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the invention provides a display substrate, including:
a driving backplate 10 comprising: an effective pixel region and a virtual pixel region; the driving back plate 10 includes a driving circuit for driving the light emitting device to emit light, and the driving circuit is composed of a thin film transistor, a capacitor, and the like.
A first electrode 14 disposed on the driving backplane 10 and located in the effective pixel region and the dummy pixel region;
the first pixel defining layer 151 is disposed in the effective pixel region, the first pixel defining layer 151 defines a plurality of opening regions, the opening regions correspond to the first electrodes 14 in the effective pixel region one to one, an orthographic projection of the opening regions on the driving backplane is located in an orthographic projection region of the corresponding first electrodes 14 on the driving backplane 10, and at least part of the first electrodes 14 in the effective pixel region is exposed out of the opening regions;
a first insulating layer 152 located in the dummy pixel region, wherein the first insulating layer 152 covers the first electrodes 14 in the dummy pixel region, and for a single first electrode 14, the area of the first electrode 14 covered by the first insulating layer 152 is larger than the area of the first electrode 14 covered by the first pixel defining layer 151;
the light emitting layer 16 is arranged on one side of the first pixel defining layer 151 and the first insulating layer 152, which is far away from the driving backplane 10, and is positioned in the effective pixel area and the virtual pixel area; the light emitting layer 16 located in the effective pixel region is disposed in the opening region defined by the first pixel defining layer 151, and the light emitting layer 16 located in the dummy pixel region is disposed on the first insulating layer 152;
and the second electrode 17 is arranged on one side of the light-emitting layer 16, which is far away from the driving backboard, and is positioned in the effective pixel area and the virtual pixel area.
The first electrode 14, the light-emitting layer 16 and the second electrode 17 in the effective pixel region constitute a light-emitting device, and light can be emitted when a potential difference exists between the first electrode 14 and the second electrode 17.
In this embodiment of the present invention, optionally, the first electrode 14 may be an anode, and the first electrode 17 may be a cathode.
The first electrode 14 in the dummy pixel region is covered by the first insulating layer 152, so that the first electrode 14 and the second electrode 17 in the dummy pixel region are disconnected, the light-emitting layer 16 in the dummy pixel region cannot emit light, light leakage in the dummy pixel region is avoided, and the product yield is improved. In addition, BM or frame materials and coating processes thereof can be omitted, production cost is reduced, and production line capacity is improved.
The light emitting layer in the embodiment of the present invention may include a white light emitting layer, and optionally, the white light emitting layer may be composed of a red light emitting layer, a green light emitting layer, and a blue light emitting layer, which are stacked. Further, the light emitting layer may further include: at least one of a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer.
In order to realize color light emission, the display substrate according to the embodiment of the present invention may further include: and the color filter layer is positioned in the effective pixel area, and the color filter layer can comprise a red filter unit, a green filter unit and a blue filter unit which respectively correspond to the opening areas defined by the first pixel definition layer.
As shown in fig. 1, the display substrate according to the embodiment of the present invention may further include:
the second insulating layer 11 is arranged on the driving back plate 10 and is positioned on one side of the first electrode 14 close to the driving back plate 10;
the metal wiring layer 12 is arranged on the driving back plate 10 and is positioned on one side, away from the driving back plate 10, of the second insulating layer 11;
a third insulating layer 13 disposed on the driving backplane 10 and between the metal wiring layer 12 and the first electrode 14;
the first electrode 14 is connected to the metal wiring layer 12 through a via hole on the third insulating layer 13, and the metal wiring layer 12 is connected to the driving backplane 10 (connected to a driving circuit on the driving backplane 10) through a via hole on the second insulating layer 11.
In an embodiment of the present invention, at least one of the second insulating layer 11 and the third insulating layer 12 may be made of an insulating material such as silicon oxide.
As shown in fig. 1, the display substrate according to the embodiment of the present invention may further include: and a coupling light-emitting layer (CPL)18 arranged on one side of the second electrode 17 far away from the driving backboard 10. The light extraction efficiency of the light emitting device can be improved by coupling the light extraction layer 18.
As shown in fig. 1, the display substrate according to the embodiment of the present invention may further include: an encapsulation layer (TFE)19 disposed on a side of the coupled light-out layer 18 remote from the driving backplane 10. By the encapsulation layer 19, encapsulation protection of the light emitting device can be achieved.
In an embodiment of the invention, the color filter layer may be disposed on a side of the package layer away from the driving backplane.
Referring to fig. 2, in the embodiment of the invention, the effective pixel area includes an effective Display area (Display AA), the Dummy pixel area (Dummy pixel area) is located around the effective Display area, and the effective Display area is an area for displaying.
Referring to fig. 2, in the embodiment of the present invention, optionally, the effective pixel area further includes: -a shift pixel area (shift pixel area) between the active display area and the virtual pixel area, the shift pixel area having the meaning of: when the display substrate is mounted in a certain housing having a display window, the size of the display window is generally equal to the size of the effective display area, and the display window is aligned with the effective display area, so that the display window can be adjusted up, down, left and right as needed, and partial display is performed by shifting the pixel area.
Referring to fig. 2, in the embodiment of the present invention, optionally, the effective pixel area further includes: the Sensing area (Sensing area) is located on one side of the effective display area, the characteristics of the light-emitting device of the Sensing area are consistent with those of the light-emitting device of the effective display area, and the characteristics of the light-emitting device of the effective display area can be effectively monitored by setting the light-emitting device of the Sensing area. In order to avoid light leakage, the sensing area can be shielded by means of BM or the like.
Referring to fig. 2, in the embodiment of the present invention, optionally, the virtual pixel area is further included between the sensing area and the effective display area, and the significance of setting the virtual pixel area at this position is as follows: and the sensing area is prevented from being too close to the effective display area, so that the measurement error is avoided.
In this embodiment of the present invention, optionally, an area of the first electrode covered by the first insulating layer is larger than an area of the first electrode in the sensing region covered by the first pixel defining layer.
In this embodiment of the present invention, optionally, a total area of an orthographic projection of the first insulating layer in the virtual pixel region on the driving backplane is greater than a total area of the first pixel defining layer in the sensing region.
Referring to fig. 3, fig. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present invention, the display substrate includes:
a driving back plate 10, the driving back plate 10 comprising: an effective pixel region and a virtual pixel region; the effective pixel region includes: the display device comprises an effective display area, an offset pixel area positioned at the periphery of the effective display area and a sensing area positioned at one side of the effective display area, wherein a virtual pixel area is positioned at the periphery of the effective pixel area and positioned between the sensing area and the offset pixel area. The driving back plate 10 includes a driving circuit for driving the light emitting device to emit light, and the driving circuit is composed of a thin film transistor, a capacitor, and the like.
A first electrode 14 disposed on the driving backplane 10 and located in the effective pixel region and the dummy pixel region;
the first pixel defining layer 151 is disposed in the effective pixel region, the first pixel defining layer 151 defines a plurality of opening regions, the opening regions correspond to the first electrodes 14 in the effective pixel region one to one, an orthographic projection of the opening regions on the driving backplane is located in an orthographic projection region of the corresponding first electrodes 14 on the driving backplane 10, and at least part of the first electrodes 14 in the effective pixel region is exposed out of the opening regions;
a first insulating layer 152 located in the dummy pixel region, wherein the first insulating layer 152 covers the first electrodes 14 in the dummy pixel region, and for a single first electrode 14, the area of the first electrode 14 covered by the first insulating layer 152 is larger than the area of the first electrode 14 covered by the first pixel defining layer 151;
the light emitting layer 16 is arranged on one side of the first pixel defining layer 151 and the first insulating layer 152, which is far away from the driving backplane 10, and is positioned in the effective pixel area and the virtual pixel area; the light emitting layer 16 located in the effective pixel region is disposed in the opening region defined by the first pixel defining layer 151, and the light emitting layer 16 located in the dummy pixel region is disposed on the first insulating layer 152;
and the second electrode 17 is arranged on one side of the light-emitting layer 16, which is far away from the driving backboard, and is positioned in the effective pixel area and the virtual pixel area.
The first electrode 14, the light-emitting layer 16 and the second electrode 17 in the effective pixel region constitute a light-emitting device, and light can be emitted when a potential difference exists between the first electrode 14 and the second electrode 17.
The first electrode 14 in the dummy pixel region is covered by the first insulating layer 152, so that the first electrode 14 and the second electrode 17 in the dummy pixel region are disconnected, the light-emitting layer 16 in the dummy pixel region cannot emit light, light leakage in the dummy pixel region is avoided, and the product yield is improved.
In addition, the display substrate of the embodiment of the invention further comprises: the specific structure of the second insulating layer 11, the metal wiring layer 12, the third insulating layer 13, the coupling light-out layer (CPL)18 and the encapsulation layer 19 is described with reference to the corresponding embodiments in fig. 1 and fig. 2.
In this embodiment of the present invention, optionally, the driving backplane is a silicon-based driving backplane, and the silicon-based driving backplane is usually a small-sized display substrate, for example, less than 2.5 inches.
The display substrate in the embodiment of the invention may be an OLED display substrate.
The embodiment of the invention also provides a manufacturing method of the display substrate, which comprises the following steps:
step S1: providing a driving back plate, the driving back plate comprising: an effective pixel region and a virtual pixel region;
step S2: forming a first electrode in an effective pixel area and a virtual pixel area of the driving backboard;
step S3: forming a first pixel defining layer in an effective pixel area of the driving backboard, forming a first insulating layer in a virtual pixel area of the driving backboard, wherein the first pixel defining layer defines a plurality of opening areas, the opening areas correspond to the first electrodes in the effective pixel area one by one, the first electrodes in the effective pixel area are at least partially exposed out of the opening areas, the first insulating layer covers the first electrodes in the virtual pixel area, and for a single first electrode, the area of the first insulating layer covering the first electrodes is larger than the area of the first electrodes covered by the first pixel defining layer;
in the embodiment of the invention, the pixel defining layer formed in the effective pixel region and the virtual pixel region is formed by a one-time composition process.
Step S4: forming light emitting layers in the effective pixel area and the virtual pixel area of the driving backboard;
step S5: and forming a cathode in the effective pixel area and the virtual pixel area of the driving backboard.
Optionally, the effective pixel region includes: the display device comprises an effective display area, an offset pixel area positioned at the periphery of the effective display area and a sensing area positioned at one side of the effective display area, wherein a virtual pixel area is positioned at the periphery of the effective pixel area and positioned between the sensing area and the offset pixel area.
An embodiment of the present invention further provides a display device, including the display substrate in any of the above embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A display substrate, comprising:
a drive backplate, the drive backplate comprising: an effective pixel region and a virtual pixel region;
the first electrode is arranged on the driving backboard and is positioned in the effective pixel area and the virtual pixel area;
the first pixel defining layer is positioned in the effective pixel area and defines a plurality of opening areas, the opening areas correspond to the first electrodes in the effective pixel area in a one-to-one mode, and at least part of the first electrodes in the effective pixel area are exposed out of the opening areas;
a first insulating layer located in the dummy pixel region, the first insulating layer covering the first electrodes in the dummy pixel region, an area of the first electrodes covered by the first insulating layer being larger than an area of the first electrodes covered by the first pixel defining layer for a single first electrode;
the light emitting layer is arranged on one side, away from the driving backboard, of the first pixel defining layer and the first insulating layer and is positioned in the effective pixel area and the virtual pixel area;
and the second electrode is arranged on one side of the light-emitting layer, which is far away from the driving backboard, and is positioned in the effective pixel area and the virtual pixel area.
2. The display substrate of claim 1, wherein the first insulating layer and the first pixel defining layer are disposed on a same layer of material.
3. The display substrate according to claim 1, wherein the first insulating layer covers an entire area of the dummy pixel region.
4. The display substrate of claim 1, wherein the active pixel region comprises an active display region, and the dummy pixel region is located around the active display region.
5. The display substrate of claim 4, wherein the active pixel area further comprises: an offset pixel region between the effective display region and the virtual pixel region.
6. The display substrate of claim 4, wherein the active pixel area further comprises: the sensing area is positioned on one side of the effective display area.
7. The display substrate of claim 6, further comprising the dummy pixel region between the sensing region and the active display region.
8. The display substrate of claim 6, wherein the first insulating layer covers an area of the first electrode that is larger than an area of the first electrode in the sensing region covered by the first pixel defining layer.
9. The display substrate of claim 6, wherein an orthographic total area of the first insulating layer in the dummy pixel region on the driving backplane is greater than a total area of the first pixel defining layer in the sensing region.
10. The display substrate of claim 1, wherein the driving backplane is a silicon-based driving backplane.
11. The display substrate of claim 1, further comprising:
the second insulating layer is arranged on the driving back plate and is positioned on one side, close to the driving back plate, of the first electrode;
the metal wiring layer is arranged on the driving back plate and is positioned on one side, away from the driving back plate, of the second insulating layer;
the third insulating layer is arranged on the driving back plate and is positioned between the metal wiring layer and the first electrode;
the first electrode is connected with the metal wiring layer through a via hole in the third insulating layer, and the metal wiring layer is connected with the driving back plate through a via hole in the second insulating layer.
12. A method for manufacturing a display substrate is characterized by comprising the following steps:
providing a driving back plate, the driving back plate comprising: an effective pixel region and a virtual pixel region;
forming a first electrode in an effective pixel area and a virtual pixel area of the driving backboard;
forming a first pixel defining layer in an effective pixel area of the driving backboard, forming a first insulating layer in a virtual pixel area of the driving backboard, wherein the first pixel defining layer defines a plurality of opening areas, the opening areas correspond to the first electrodes in the effective pixel area one by one, the first electrodes in the effective pixel area are at least partially exposed out of the opening areas, the first insulating layer covers the first electrodes in the virtual pixel area, and for a single first electrode, the area of the first insulating layer covering the first electrodes is larger than the area of the first electrodes covered by the first pixel defining layer;
forming light emitting layers in the effective pixel area and the virtual pixel area of the driving backboard;
and forming a second electrode in the effective pixel area and the virtual pixel area of the driving backboard.
13. A display device comprising the display substrate according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111067961.0A CN113793855A (en) | 2021-09-13 | 2021-09-13 | Display substrate, manufacturing method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111067961.0A CN113793855A (en) | 2021-09-13 | 2021-09-13 | Display substrate, manufacturing method thereof and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190181200A1 (en) * | 2017-12-07 | 2019-06-13 | Lg Display Co., Ltd. | Electroluminescence display device |
| CN110518037A (en) * | 2019-08-26 | 2019-11-29 | 武汉天马微电子有限公司 | Display panel and display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190181200A1 (en) * | 2017-12-07 | 2019-06-13 | Lg Display Co., Ltd. | Electroluminescence display device |
| CN109904333A (en) * | 2017-12-07 | 2019-06-18 | 乐金显示有限公司 | El display device |
| CN110518037A (en) * | 2019-08-26 | 2019-11-29 | 武汉天马微电子有限公司 | Display panel and display device |
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