CN113097285B - Display substrate and display device - Google Patents
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- CN113097285B CN113097285B CN202110400330.XA CN202110400330A CN113097285B CN 113097285 B CN113097285 B CN 113097285B CN 202110400330 A CN202110400330 A CN 202110400330A CN 113097285 B CN113097285 B CN 113097285B
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Classifications
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
Abstract
The invention provides a display substrate and a display device, wherein the display substrate comprises: a substrate including a display region and a non-display region surrounding the display region; the display area comprises a luminous functional layer, the display substrate further comprises a packaging layer arranged on the luminous functional layer, at least two layers of metal film layers are arranged on one side, away from the substrate, of the packaging layer, the at least two layers of metal film layers are arranged in the display area and have patterns with touch control functions and patterns with fingerprint identification functions, and the at least two layers of metal film layers are arranged in the non-display area and form a coil with a near-field communication function. The method is used for realizing effective integration of a touch control function, a fingerprint identification function and a near field communication function.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display substrate and a display device.
Background
Near Field Communication (NFC) is a short-distance high-frequency wireless communication technology, and is specifically developed by a non-contact radio frequency identification (Radio Frequency Identification, RFID) and a wireless interconnection technology, wherein radio waves (i.e., electromagnetic waves) close to an electromagnetic field follow maxwell's equation, and an electric field and a magnetic field alternately perform energy conversion between a transmitting antenna and a receiving antenna, so that functions of electronic payment, data conversion, access control, anti-counterfeiting and the like of the device can be realized.
How to realize effective integration of near field communication functions without increasing the process is important.
Disclosure of Invention
The invention provides a display substrate and a display device, which are used for realizing effective integration of a touch control function, a fingerprint identification function and a near field communication function.
In a first aspect, an embodiment of the present invention provides a display substrate, including:
a substrate including a display region and a non-display region surrounding the display region;
The display area comprises a luminous functional layer, the display substrate further comprises a packaging layer arranged on the luminous functional layer, at least two layers of metal film layers are arranged on one side, away from the substrate, of the packaging layer, the at least two layers of metal film layers are arranged in the display area and have patterns with touch control functions and patterns with fingerprint identification functions, and the at least two layers of metal film layers are arranged in the non-display area and form a coil with a near-field communication function.
In one possible implementation manner, the at least two metal film layers include a first metal film layer and a second metal film layer which are sequentially deviated from the substrate, the first metal film layer and the second metal film layer simultaneously form the patterns with the touch control function and the patterns with the fingerprint identification function which are staggered in the display area, and the first metal film layer and the second metal film layer form the two layers of the coils which are stacked in the non-display area.
In one possible implementation manner, the display substrate further includes a first insulating layer located between the first metal film layer and the second metal film layer, and the two stacked coils are coupled through a first via hole penetrating through the first insulating layer.
In one possible implementation manner, the first metal film layer has a touch lead coupled with the pattern with the touch function in the non-display area, and the coil located in the first metal film layer is disconnected at a position intersecting with the touch lead.
In one possible implementation, the first metal film layer has a connection lead coupled to an end of the coil located at the second metal film layer in the non-display region, and the coil located at the first metal film layer is disconnected from the connection lead at a position crossing the connection lead.
In one possible implementation manner, the second metal film layer is provided with a first binding electrode connected with the touch lead in the non-display area and a second binding electrode connected with the connection lead, and the first binding electrode and the second binding electrode are respectively located in two areas.
In one possible implementation manner, the at least two metal film layers include a third metal film layer, a fourth metal film layer, a fifth metal film layer and a sixth metal film layer which are sequentially deviated from the substrate, the third metal film layer and the fourth metal film layer form the pattern with the touch function in the display area, the fifth metal film layer and the sixth metal film layer form the pattern with the fingerprint identification function in the display area, and the third metal film layer, the fourth metal film layer, the fifth metal film layer and the sixth metal film layer form the four layers of coils which are stacked in the non-display area.
In one possible implementation manner, the display substrate further includes a second insulating layer located between the third metal film layer and the fourth metal film layer, a third insulating layer located between the fourth metal film layer and the fifth metal film layer, and a fourth insulating layer located between the fifth metal film layer and the sixth metal film layer, and the four stacked layers of the coils are coupled through a second via hole penetrating the second insulating layer, a third via hole penetrating the third insulating layer, and a fourth via hole penetrating the fourth insulating layer.
In one possible implementation, the width of the coil ranges from 200 μm to 300 μm in a direction along the non-display area toward the display area.
In a second aspect, an embodiment of the present invention provides a display apparatus, including:
a display substrate as claimed in any one of the preceding claims.
The beneficial effects of the invention are as follows:
the embodiment of the invention provides a display substrate and a display device, wherein the display substrate comprises a substrate, the substrate comprises a display area and a non-display area surrounding the display area, the display area comprises a luminous functional layer, the display substrate further comprises a packaging layer arranged on the luminous functional layer, one side of the packaging layer, which is far away from the substrate, is provided with at least two metal film layers, the at least two metal film layers are provided with patterns with touch control functions and patterns with fingerprint identification functions in the display area, the at least two metal film layers form coils with near field communication functions in the non-display area, that is, the at least two metal film layers arranged on one side, which is far away from the substrate, of the packaging layer can realize effective integration of the touch control functions, the fingerprint identification functions and the near field communication functions, namely, the touch control functions, the fingerprint identification functions and the near field communication functions are integrated on the display substrate.
Drawings
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a portion of the structure of the display device of FIG. 1 including a driving circuit layer;
FIG. 3 is a schematic diagram of corresponding positions of sub-pixels and metal grids in a display substrate according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of one of the touch layers in the pattern with touch function in FIG. 1;
fig. 5 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
Fig. 6 is a schematic top view of a display substrate according to an embodiment of the present invention;
FIG. 7 is a schematic view of one of the cross-sectional structures along the direction AA' in FIG. 6;
FIG. 8 is a schematic view of a cross-sectional structure along the direction CC' in FIG. 6;
FIG. 9 is a schematic view showing a cross-sectional structure along the BB' direction in FIG. 6;
FIG. 10 is a schematic view of one of the cross-sectional structures along the DD' direction in FIG. 6;
FIG. 11 is a schematic view of one of the sectional structures along the direction EE' in FIG. 6;
fig. 12 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the invention.
Reference numerals illustrate:
1-a substrate base; an A-display area; b-a non-display area; 2-a light-emitting functional layer; 3-packaging layer; 4-coils; 5-at least two metal film layers; 6-a first touch unit; 7-a second touch unit; d1—a first direction; d2—a second direction; 8-a first touch electrode; 9-a first connection; 10-a second touch electrode; d3—a third direction; 11-a second connection; 12-a first transmission line; 13-a second transmission line; 14-a first pad electrode; 15-a second pad electrode; 16-a driving circuit layer; 17-pixel units; 18-grid pattern; a T-touch function area; f-fingerprint identification area; an L-coil region; 51-a first metal film layer; 52-a second metal film layer; 19-a first insulating layer; 20-touch lead; 21-connecting leads; 22-a first binding electrode; 23-a second binding electrode; 53-a third metal film layer; 54-a fourth metal film layer; 55-a fifth metal film layer; 56-a sixth metal film layer; 24-a second insulating layer; 25-a third insulating layer; 26-a fourth insulating layer; 27-a barrier dam; 28-a first inorganic layer; 29-an organic layer; 30-a second inorganic layer; 100-display substrate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. And embodiments of the invention and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used in this specification, the word "comprising" or "comprises", and the like, means that the element or article preceding the word is meant to encompass the element or article listed thereafter and equivalents thereof without excluding other elements or articles.
It should be noted that the dimensions and shapes of the figures in the drawings do not reflect true proportions, and are intended to illustrate the present invention only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
As shown in fig. 1, an embodiment of the present invention provides a display substrate, including:
a base substrate 1, the base substrate 1 including a display area a and a non-display area B surrounding the display area a;
The display area A comprises a luminous functional layer 2, the display substrate further comprises a packaging layer 3 arranged on the luminous functional layer 2, at least two layers of metal film layers 5 are arranged on one side, away from the substrate 1, of the packaging layer 3, the at least two layers of metal film layers 5 are arranged in the display area A and have patterns with touch control functions and patterns with fingerprint identification functions, and the at least two layers of metal film layers 5 are arranged in the non-display area B and form a coil 4 with a near-field communication function.
In a specific implementation process, the substrate 1 may be a silicon-based substrate, or may be a glass-based substrate. In addition, the substrate 1 may be a flexible base, correspondingly, the substrate 1 includes a first flexible material layer, a first inorganic material layer, a semiconductor layer, a second flexible material layer and a second inorganic material layer that are stacked, the materials of the first flexible material layer and the second flexible material layer may be Polyimide (PI), polyethylene terephthalate (PET) or a surface-treated polymer soft film, the materials of the first inorganic material layer and the second inorganic material layer may be silicon nitride (SiNx) or silicon oxide (SiOx) for improving the water-oxygen resistance of the substrate base, and the materials of the semiconductor layer may be amorphous silicon (a-Si). In the specific implementation process, the substrate 1 may be set according to practical application requirements, which is not limited herein. In addition, the substrate 1 includes a display area a and a non-display area B surrounding the display area a, where the distribution of the display area a and the non-display area B may be the case shown in fig. 1, or the distribution of the display area a and the non-display area B may be set according to actual application needs, which will not be described in detail herein.
In a specific implementation process, the display area a includes a light emitting functional layer 2, the display substrate further includes an encapsulation layer 3 disposed on the light emitting functional layer 2, and the display substrate further includes a driving circuit layer 16 disposed between the substrate 1 and the light emitting functional layer 2, where the driving circuit layer 16 is only disposed in the display area a.
In an implementation, the driving circuit layer 16 may include transistors and storage capacitors that form a pixel driving circuit, and each sub-pixel is illustrated in fig. 2 as including one transistor and one storage capacitor. Wherein the driving circuit layer of each sub-pixel may include: a Buffer layer (Buffer) disposed on the substrate 1, an active layer disposed on the Buffer layer, a first Gate insulating layer (GI 1) covering the active layer, a Gate electrode (Gate) and a first capacitor electrode disposed on the first Gate insulating layer (GI 1), a second Gate insulating layer (GI 2) covering the Gate electrode (Gate) and the first capacitor electrode, a second capacitor electrode disposed on the second Gate insulating layer (GI 2), an interlayer Insulating Layer (ILD) covering the second capacitor electrode, a via hole formed in the interlayer Insulating Layer (ILD) exposing the active layer, a source electrode and a drain electrode disposed on the interlayer insulating layer, the source electrode and the drain electrode being connected to the active layer through the via hole, respectively, and a Planar Layer (PLN) covering the above structure. The active layer, the gate electrode, the source electrode and the drain electrode form a transistor, and the first capacitor electrode and the second capacitor electrode form a storage capacitor. Wherein, the Buffer layer (Buffer), the first gate insulating layer (GI 1), the second gate insulating layer (GI 2) and the interlayer Insulating Layer (ILD) may be any one or more of silicon oxide (SiOx), silicon nitride (SiNx) and silicon oxynitride (SiON), and may be a single layer, a multi-layer or a composite layer. The active layer film can be made of amorphous indium gallium zinc Oxide (a-IGZO), zinc oxynitride (ZnON), indium Zinc Tin Oxide (IZTO), amorphous silicon (a-Si), polysilicon (p-Si), hexathiophene or polythiophene, and the like, namely the embodiment of the invention is applicable to transistors manufactured based on Oxide (Oxide) technology, silicon technology or organic technology.
In a specific implementation process, the light emitting functional layer 2 may include an anode, a pixel defining layer, an organic light emitting layer and a cathode, where the anode is disposed on the flat layer and connected to the drain electrode through a via hole formed on the flat layer, the pixel defining layer is disposed on the anode and the flat layer and provided with a pixel opening, the pixel opening exposes the anode, the organic light emitting layer is disposed in the pixel opening, the cathode is disposed on the organic light emitting layer, and the organic light emitting layer emits light of a corresponding color under the action of the applied voltages of the anode and the cathode. Wherein, the encapsulation layer 3 may include a first inorganic layer 28, an organic layer 29, and a second inorganic layer 30, which are sequentially away from the substrate 1, and the encapsulation layer 3 may prevent external moisture from entering the light-emitting functional layer 2, thereby improving the usability of the display substrate.
In a specific implementation process, the light-emitting functional layer 2 includes a light-emitting region and a non-light-emitting region. Still referring to fig. 2, since the organic light emitting layer emits light in the pixel opening region defined by the pixel defining layer, the pixel opening region is a light emitting region P1, the region outside the pixel opening is a non-light emitting region P2, and the non-light emitting region P2 is located at the periphery of the light emitting region P1. In the embodiment of the present invention, each light-emitting area P1 is called a sub-pixel (sub-pixel), such as a red sub-pixel, a blue sub-pixel or a green sub-pixel, and each non-light-emitting area P2 may be used to set the pattern with touch function and the pattern with fingerprint recognition function, which may include a touch function area T and a fingerprint recognition area F. In this way, the light emitting area of the light emitting functional layer 2 includes a plurality of sub-pixels arranged periodically, and the non-light emitting area of the light emitting functional layer 2 includes a plurality of touch functional areas T and a plurality of fingerprint recognition functional areas F.
In a specific implementation process, the light-emitting functional layer 2 includes a plurality of regularly arranged pixel units, and each pixel unit may include three sub-pixels including a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel. In addition, each pixel unit may further include four sub-pixels, for example, each pixel unit includes a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, or each pixel unit includes a red sub-pixel, two green sub-pixels, and a blue sub-pixel. In the embodiment of the application, the number and arrangement of the sub-pixels in each pixel unit are not limited. As shown in fig. 3, which is one of the structural diagrams of the pixel unit 17, the R sub-pixel is a hexagon, the G sub-pixel and the B sub-pixel are pentagons, wherein the G sub-pixels of the two pentagons are located in the middle of the pixel unit, and the R sub-pixel of the hexagon and the B sub-pixel of the hexagon are located at two sides of the G sub-pixel respectively. In a specific implementation process, the shape of the sub-pixels may be any one or more of triangle, square, rectangle, diamond, trapezoid, parallelogram, pentagon, hexagon and other polygons, and the arrangement manner may be X-shape, cross-shape or delta-shape, etc., which is not limited herein. Still referring to fig. 3, the grid pattern 18 corresponding to the pattern with the touch function is hexagonal, and the shape of the grid pattern 18 is adapted to the shapes of the B sub-pixels and the R sub-pixels in the pixel unit. The B sub-pixel and the R sub-pixel in one pixel unit 17 are respectively located in an area surrounded by two grid patterns, and the two G sub-pixels are located in an area surrounded by the same grid pattern. The metal lines of the grid pattern 18 are located in the areas between adjacent sub-pixels.
In the implementation process, when the shape of the grid pattern is polygonal, each side of the polygon can be regarded as each metal line of the grid pattern, and the number of sides of the polygon is the number of metal lines of the grid pattern. For example, when the mesh pattern is hexagonal, the mesh pattern has six metal lines.
In a specific implementation process, at least two metal film layers 5 are disposed on a side of the encapsulation layer 3 facing away from the substrate 1, where the at least two metal film layers 5 may be two layers, three layers, four layers, or the like, and specifically, the number of layers of the at least two metal film layers 5 may be set according to actual application needs, which is not limited herein, and fig. 1 only illustrates a case where the at least two metal film layers 5 are two layers. Each metal film layer may be made of a metal material such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti) and molybdenum (Mo), or an alloy material of the above metals such as aluminum neodymium alloy (AlNd) or molybdenum niobium alloy (MoNb), and may be a single-layer structure or a multi-layer composite structure such as Ti/Al/Ti, etc. The at least two metal film layers 5 have a pattern with a touch function and a pattern with a fingerprint identification function in the display area a, the display substrate integrates the touch function and the fingerprint identification function in the display area a through the at least two metal film layers 5, in addition, the at least two metal film layers 5 form a coil 4 with a near field communication function in the non-display area B, the coil 4 may be a structure surrounding the display area a, or may be a multi-circumference structure surrounding the display area a, specifically, the number of circumferences of the coil 4 may be set according to practical applications, which is not limited herein, and fig. 1 only illustrates a case that the coil 4 is one circumference. The pattern with the touch function may be located in the touch function area T (shown by a dashed box in fig. 1), the pattern with the fingerprint identification function may be located in the fingerprint identification function area F (shown by a dashed box in fig. 1), and the coil 4 may be located in the coil area L (shown by a dashed box in fig. 1), that is, the display substrate integrates the function of near field communication in the non-display area B through the at least two metal film layers 5, so that the integration of the touch function, the fingerprint identification function and the near field communication function of the display substrate is realized through the at least two metal film layers 5, and the usability of the display substrate is ensured.
In a specific implementation process, the pattern with the touch function includes a bridging layer, an insulating layer and a touch layer that sequentially deviate from the substrate 1, fig. 4 is a schematic structural diagram of one of the touch layers, as shown in fig. 4, the touch layer includes a plurality of first touch units 6 and a plurality of second touch units 7, the first touch units 6 have a linear shape extending along a first direction D1, a plurality of first touch units 6 are sequentially arranged along a second direction D2, the second touch units 7 have a linear shape extending along a second direction D2, and a plurality of second touch units 7 are sequentially arranged along the first direction D1, where the first direction D1 intersects with the second direction D2.
Each first touch unit 6 includes a plurality of first touch electrodes 8 and first connection portions 9 arranged along a first direction D1, and the plurality of first touch electrodes 8 and the plurality of first connection portions 9 are alternately arranged and sequentially connected. Each of the second touch units 7 includes a plurality of second touch electrodes 10 arranged along a second direction D2, the plurality of second touch electrodes 10 are disposed at intervals, and adjacent second touch electrodes 10 are connected to each other through a second connection portion 11. The second connection portion 11 is different from the first touch electrode 8 and the second touch electrode 10. The first touch electrodes 8 and the second touch electrodes 10 are alternately arranged in a third direction D3, and the third direction D3 crosses the first direction D1 and the second direction D2.
Each of the first touch units 6 is connected to a first pad electrode 14 through a first transmission line 12, and each of the second touch units 7 is connected to a second pad electrode 15 through a second transmission line 13. In a specific implementation process, the first touch electrode 8 is connected to a driver of the display panel through the first pad electrode 14, the second touch electrode 10 is connected to the driver through the second pad electrode 15, the driver applies a driving signal to the second touch electrode 10 and receives an output signal from the first touch electrode 8, or the driver may apply a driving signal to the first touch electrode 8 and receive an output signal from the second touch electrode 10. The driver can determine the position of touch occurrence by detecting induction signals generated in the plurality of electrodes when different electrodes emit touch signals.
In the implementation process, the touch layer may be a mutual capacitive touch structure or a self-capacitive touch structure, and the structure of the touch layer may be specifically set according to practical application, which is not limited herein. The first touch electrodes 8, the second touch electrodes 10 and the first connecting portions 9 may be disposed on the same layer and may be formed by the same patterning process, the first touch electrodes 8 and the first connecting portions 9 may be integrally connected to each other, and the second connecting portions 11 may be disposed on a bridging layer, and via holes disposed on an insulating layer enable adjacent second touch electrodes 10 to be connected to each other. In some possible implementations, the plurality of first touch electrodes 8, the plurality of second touch electrodes 10, and the plurality of second connection portions 11 may be disposed on the same layer on the touch layer, the second touch electrodes 10 and the second connection portions 11 may be integrally connected to each other, and the first connection portions 9 may be disposed on a bridging layer, and connect adjacent first touch electrodes 8 to each other through vias disposed on an insulating layer. The first touch electrode may be a driving electrode (Tx), the second touch electrode may be a sensing electrode (Rx), or the first touch electrode may be a sensing electrode (Rx), and the second touch electrode may be a driving electrode (Tx).
In a specific implementation process, the shapes of the first touch electrode 8 and the second touch electrode 10 may be diamond. In addition, the shapes of the first touch electrode 8 and the second touch electrode 10 may be any one or more of triangle, square, trapezoid, parallelogram, pentagon, hexagon and other polygons, which is not limited herein.
In a specific implementation process, the first touch electrode 8 and the second touch electrode 10 may be in a metal mesh form, where the metal mesh is formed by interlacing a plurality of metal wires, and the metal mesh includes a plurality of mesh patterns, and the mesh patterns are polygons formed by the plurality of metal wires. The first touch electrode 8 and the second touch electrode 10 in the form of metal grids have the advantages of small resistance, small thickness, high reaction speed and the like. In one grid pattern, the area surrounded by the metal lines includes the sub-pixel area in the light emitting functional layer 2, and the positions of the metal lines are located between adjacent sub-pixels. For example, when the light emitting functional layer 2 is an Organic LIGHT EMITTING Diode (OLED) light emitting functional layer 2, the sub-pixel region is a light emitting region defined by a pixel defining layer in the light emitting functional layer 2, the region surrounded by the metal lines includes the light emitting region, and the metal lines are located at corresponding positions of the pixel defining layer, that is, in the non-light emitting region. The line width of the metal line may be 2 μm to 5 μm, and specifically, the line width of the metal line may be set according to practical applications, and is not limited herein.
In the specific implementation process, the pattern with the fingerprint identification function can be a capacitive structure, can be integrated on the cover plate, and is used for integrating the pattern with the touch control function and the pattern with the fingerprint identification function on the cover plate, and is arranged on the packaging layer 3, so that the influence on circuit speed and signal loss are avoided due to the fact that parasitic capacitance is small, in addition, fingers are enabled to be closer to the pattern with the fingerprint identification function, the problem of penetration distance limitation is avoided, fingerprint identification precision is higher, and the two functions are integrated on the display substrate, so that the manufacturing cost of the display substrate is reduced.
In an embodiment of the present invention, as shown in fig. 5, which is a schematic structural diagram of the display substrate, specifically, the at least two metal film layers 5 include a first metal film layer 51 and a second metal film layer 52 that sequentially deviate from the substrate 1, the first metal film layer 51 and the second metal film layer 52 form the pattern with the touch function and the pattern with the fingerprint recognition function that are staggered at the same time in the display area a, and the first metal film layer 51 and the second metal film layer 52 form the two stacked layers of the coils 4 in the non-display area B.
In a specific implementation process, as shown in fig. 5, if the at least two metal film layers 5 include a first metal film layer 51 and a second metal film layer 52 that sequentially deviate from the substrate 1, the pattern with touch function and the pattern with fingerprint recognition function, which are formed by the first metal film layer 51 and the second metal film layer 52 in the display area a at the same time, are both located in the non-light-emitting area P2, and the pattern with touch function and the pattern with fingerprint recognition function are staggered in the non-light-emitting area P2. Further, the first metal film layer 51 and the second metal film layer 52 form two layers of the coil 4 stacked in the non-display area B, and fig. 5 illustrates a case where the coil 4 is two turns. In the actual manufacturing process, the pattern with the fingerprint recognition function may be prepared through the same metal film layer in the hollow area in the metal grid in the pattern with the touch function, for example, the fingerprint recognition electrode is manufactured in the hollow area of the metal grid while the metal grid of the first touch electrode 8 is manufactured through the first metal film layer 51. That is, the partial pattern with the touch function and the partial pattern with the fingerprint recognition function and the partial pattern with the near field communication function may be fabricated in the same layer by the first metal film layer 51, and the other partial pattern with the touch function and the other partial pattern with the fingerprint recognition function and the partial pattern with the near field communication function may be fabricated in the same layer by the second metal film layer 52, so that the effective integration of the touch function, the fingerprint recognition function and the near field communication function of the display substrate is realized without increasing the process steps. Fig. 5 schematically illustrates a touch functional area T corresponding to the pattern with a touch function, a fingerprint identification functional area F corresponding to the pattern with a fingerprint identification function, and a coil area L, where when the thickness of the metal film layer is a certain value, the metal line width corresponding to the second metal film layer 52 may be greater than the metal line width corresponding to the first metal film layer 51, so as to reduce the resistance of the corresponding metal grid, improve the touch precision, the fingerprint identification precision, and the quality of near field communication, and further ensure the usability of the display substrate.
In the embodiment of the present invention, still referring to fig. 5, the display substrate further includes a first insulating layer 19 located between the first metal film layer 51 and the second metal film layer 52, and the two stacked coils 4 are coupled through a first via hole penetrating through the first insulating layer 19, where the first insulating layer 19 may be a film layer made of a material such as silicon nitride (SiNx) or silicon oxide (SiOx), so that the integration of the display substrate to the near field communication function is realized through the first metal film layer 51 and the second metal film layer 52, and the service performance of the display substrate is improved.
In an embodiment of the present invention, in combination with one of the schematic top view structures of the display substrate shown in fig. 6, the coil 4 is of a two-turn structure surrounding the display area a, only three touch leads 20 coupled to the pattern with a touch function in the display area a are shown in fig. 6, and in practical application, the touch leads 20 may be a plurality of other touch leads except three, and the arrangement manner of each touch lead 20 may be set with reference to fig. 6. Fig. 7 is a schematic cross-sectional view along the AA' direction in fig. 6, in fig. 7, the touch lead 20 and the coil 4 need to be arranged in a crossing manner, and in fig. 7, reference sign P is a composite film layer, and the composite film layer P includes the substrate 1, the driving circuit layer 16, the light emitting functional layer 2 and the encapsulation layer 3. Referring to fig. 7, the first metal film layer 51 has a touch lead 20 coupled to the pattern having the touch function in the non-display area B, and the coil 4 located in the first metal film layer 51 is disconnected from the touch lead 20 at a position intersecting with the touch lead 20. In a specific implementation process, the first metal film layer 51 may form the touch lead 20 coupled with the pattern with the touch function in the non-display area B, and the coil 4 located in the first metal film layer 51 is disconnected at a position intersecting with the touch lead 20, so that a short circuit (short) between the touch lead 20 and the coil 4 at the intersecting position is avoided. In addition, the touch lead 20 is formed by the first metal film layer 51, and the second metal film layer 52 forms a wiring portion of the coil 4 perpendicular to the touch lead 20, so that on one hand, the risk of wire breakage caused by metal overetching is avoided, and on the other hand, the resistance of the coil 4 can be reduced by arranging the thicker second metal film layer 52, so that the function of near-field communication of the display substrate is improved.
Fig. 8 is a schematic view of a cross-sectional structure along the direction CC' in fig. 6, in fig. 8, the first metal film layer 51 has a connection lead 21 coupled to an end of the coil 4 located in the second metal film layer 52 in the non-display area B, and the coil 4 located in the first metal film layer 51 is disconnected at a position intersecting the connection lead 21. In a specific implementation process, the position where the coil 4 located in the first metal film layer 51 intersects with the connection lead 21 is disconnected, so that a short circuit (short) is avoided at the position where the connection lead 21 intersects with the coil 4, and the usability of the display substrate is improved.
In the implementation process, fig. 9 is a schematic cross-sectional structure along the BB' direction in fig. 6, where the coil 4 located in the first metal film layer 51 is not intersected with the touch lead 20. Fig. 10 is a schematic cross-sectional view along the DD' direction in fig. 6, and the coil 4 located in the second metal film layer 52 is disconnected from the touch lead 20. Fig. 11 is a schematic cross-sectional structure along EE' in fig. 6, in which the connection lead 21 spans across the coil 4 located in the second metal film layer 52, and the connection lead 21 is disconnected from the coil 4 located in the second metal film layer 52, so that the display substrate is ensured to effectively integrate the touch function and the near field communication function.
Still referring to fig. 6, the second metal film layer 52 has a first bonding electrode 22 connected to the touch lead 20 and a second bonding electrode 23 connected to the connection lead 21 in the non-display area B, where the first bonding electrode 22 and the second bonding electrode 23 are located in two areas, respectively. The number of the first bonding electrodes 22 may be plural, and the number of the second bonding electrodes 23 may be plural, and specifically, the number of the first bonding electrodes 22 and the number of the second bonding electrodes 23 may be set according to practical applications, which is not limited herein. In addition, the first bonding electrode 22 and the second bonding electrode 23 are respectively located in two different areas of the non-display area B, so that mutual influence between the touch function and the coil 4 function in the display substrate can be ensured, and wirings coupled with the pattern with the fingerprint recognition function can be laid out according to the same implementation principle, which is not described herein again.
In the embodiment of the present invention, as shown in fig. 12, one of the structural schematic diagrams of the display substrate is shown, the display substrate includes a third metal film layer 53, a fourth metal film layer 54, a fifth metal film layer 55 and a sixth metal film layer 56 that sequentially deviate from the substrate 1, the third metal film layer 53 and the fourth metal film layer 54 form the pattern with the touch function in the display area a, the fifth metal film layer 55 and the sixth metal film layer 56 form the pattern with the fingerprint recognition function in the display area a, the third metal film layer 53, the fourth metal film layer 54, the fifth metal film layer 55 and the sixth metal film layer 56 form the laminated fourth layer coil 4 in the non-display area B, the display substrate further includes a second insulating layer 24 located between the third metal film layer 53 and the fourth metal film layer 54, a third insulating layer 25 located between the fourth metal film layer 54 and the fifth metal film layer 55, and a fourth insulating layer 26 located between the fourth metal film layer 26 and the fourth insulating layer 26 penetrating through the fourth insulating layer 26 and the fourth insulating layer 26.
In a specific implementation process, still referring to fig. 12, the coil 4 is made of four metal film layers of the third metal film layer 53, the fourth metal film layer 54, the fifth metal film layer 55 and the sixth metal film layer 56 that are stacked, so that the resistance of the coil 4 can be reduced to a certain extent, and the function of near field communication of the display substrate is improved. The second insulating layer 24, the third insulating layer 25, and the fourth insulating layer 26 may be film layers made of materials such as silicon nitride (SiNx) and silicon oxide (SiOx).
As still combined with fig. 12, the encapsulation layer 3 includes a first inorganic layer 28, an organic layer 29 and a second inorganic layer 30 which are sequentially directed away from the substrate 1, the non-display area B further includes a barrier dam 27 surrounding the display area a, the first inorganic layer 28 is located on the barrier dam 27, and the coil 4 is located on a side of the barrier dam 27 close to the display area a. In a specific implementation process, the first inorganic layer 28 can also avoid corrosion of the coil 4 by external water oxygen, so as to improve the usability of the display substrate.
In the embodiment of the invention, the width of the coil 4 is 200 μm to 300 μm along the direction of the non-display area B pointing to the display area a, for example, the width of the coil 4 is 280 μm, so that the coil 4 is ensured to have smaller resistance while the design of the narrow frame of the display substrate is considered, and the near field communication quality is improved. In addition, each metal film layer of the at least two metal film layers 5 may be a composite film layer composed of titanium, aluminum and titanium, may also be a copper (Cu) film layer, may also be molybdenum (Mo), and may specifically be selected according to practical application needs, which is not limited herein.
Based on the same inventive concept, as shown in fig. 13, the embodiment of the present invention further provides a display device, which includes a display substrate 100, and the principle of solving the problem of the display device is similar to that of the display substrate 100, so that the implementation of the display device can refer to the implementation of the display substrate 100, and the repetition is omitted.
In a specific implementation process, the display device provided by the embodiment of the invention includes the display substrate described in any one of the above, and the display device may be an OLED display device or a Quantum Dot LIGHT EMITTING Diodes (QLED) display device, and may be specifically applied to any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like. Other essential components of the display device will be understood by those skilled in the art, and will not be described herein in detail, nor should they be considered as limiting the invention.
For example, the display device may be a Flexible Multi-layer On Cell (FMLOC) display device, and the pattern with the Touch function is directly manufactured On the stacked light emitting functional layer 2 and the packaging layer 3, so that the use of optical transparent adhesive (Optically CLEAR ADHESIVE, OCA) is reduced, and the display device is not connected by a Touch Flexible circuit board (Touch FPC, TFPC), and has high integration and light weight.
It should be noted that, in some embodiments of the present invention, the display substrate and the display device may further include other structures, which may be determined according to practical application requirements, and are not limited herein.
The embodiment of the invention provides a display substrate and a display device, wherein the display substrate comprises a substrate 1, the substrate 1 comprises a display area and a non-display area B surrounding the display area, the display area comprises a luminous functional layer 2, the display substrate further comprises a packaging layer 3 arranged on the luminous functional layer 2, one side of the packaging layer 3, which is far away from the substrate 1, is provided with at least two metal film layers, the at least two metal film layers are provided with patterns with a touch function and patterns with a fingerprint recognition function in the display area, and the at least two metal film layers form a coil 4 with a near field communication function in the non-display area B, namely, the at least two metal film layers arranged on one side of the packaging layer 3, which is far away from the substrate 1, can realize effective integration of the touch function, the fingerprint recognition function and the near field communication function, namely, the touch function, the fingerprint recognition function and the near field communication function are integrated on the display substrate.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. A display substrate, comprising:
a substrate including a display region and a non-display region surrounding the display region;
the display area comprises a luminous functional layer, the display substrate further comprises a packaging layer arranged on the luminous functional layer, at least two metal film layers are arranged on one side, away from the substrate, of the packaging layer, the at least two metal film layers are provided with patterns with touch control functions and patterns with fingerprint identification functions in the display area, and the at least two metal film layers form a coil with near field communication functions in the non-display area;
The at least two metal film layers comprise a third metal film layer, a fourth metal film layer, a fifth metal film layer and a sixth metal film layer which are sequentially deviated from the substrate, the third metal film layer and the fourth metal film layer form patterns with touch functions in the display area, the fifth metal film layer and the sixth metal film layer form patterns with fingerprint identification functions in the display area, and the third metal film layer, the fourth metal film layer, the fifth metal film layer and the sixth metal film layer form four layers of coils which are stacked in the non-display area.
2. The display substrate of claim 1, further comprising a second insulating layer between the third metal film layer and the fourth metal film layer, a third insulating layer between the fourth metal film layer and the fifth metal film layer, and a fourth insulating layer between the fifth metal film layer and the sixth metal film layer, the four stacked layers of the coil coupled by a second via through the second insulating layer, a third via through the third insulating layer, and a fourth via through the fourth insulating layer.
3. The display substrate according to claim 1, wherein a width of the coil ranges from 200 μm to 300 μm in a direction along the non-display region toward the display region.
4. A display device, comprising:
A display substrate according to any one of claims 1-3.
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