CN111509009B - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN111509009B CN111509009B CN202010322103.5A CN202010322103A CN111509009B CN 111509009 B CN111509009 B CN 111509009B CN 202010322103 A CN202010322103 A CN 202010322103A CN 111509009 B CN111509009 B CN 111509009B
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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- 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
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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
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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
- H10K59/1201—Manufacture or treatment
Abstract
The invention provides a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. The invention provides a display panel which comprises a substrate, a plurality of light emitting devices and a plurality of fingerprint identification units. The fingerprint identification device comprises a substrate, a plurality of light emitting devices, a plurality of fingerprint identification units, at least one fingerprint identification unit and a light emitting device, wherein the light emitting devices are arranged on one side of the substrate, the light emitting devices are arranged in the fingerprint identification area, the light emitting devices are arranged on one side of the substrate, which is away from the substrate, of the fingerprint identification unit, and the at least one fingerprint identification unit is stacked with the light emitting devices in the fingerprint identification area. The fingerprint identification unit in the display panel does not occupy the space of the layer where the additional light emitting device is located, so that the fingerprint identification unit can be prevented from influencing the resolution of the display panel, and the fingerprint identification unit can be prevented from influencing the light emitting rate of the light emitting device.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel, a manufacturing method thereof and a display device.
Background
With the development of display technology, a display panel with a fingerprint recognition function has become a mainstream, and fingerprint recognition is generally achieved by arranging a fingerprint recognition unit in a fingerprint recognition area of the display panel according to a change in light intensity received by the fingerprint recognition unit.
However, in the fingerprint recognition panel in the prior art, the fingerprint recognition units are arranged in the gaps among the plurality of pixel units in the display panel, and as the display panel is developed towards the high resolution, the gaps among the pixel units are smaller and smaller, if the fingerprint recognition units are arranged in the gaps, the pixel density of the display panel can be affected, and if the number of the fingerprint recognition units is reduced, the sensitivity of the fingerprint recognition units can be affected, so that a better fingerprint recognition effect is difficult to achieve.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a display panel with a fingerprint identification function, wherein a fingerprint identification unit in the display panel does not occupy the space of a layer where an additional light emitting device is positioned, so that the fingerprint identification unit can be prevented from influencing the resolution of the display panel, and the fingerprint identification unit can be prevented from influencing the light emitting rate of the light emitting device.
The technical scheme adopted for solving the technical problem of the invention is a display panel, which comprises a fingerprint identification area; the display panel includes:
a substrate;
a plurality of light emitting devices disposed at one side of the substrate;
the fingerprint identification units are arranged on one side, away from the substrate, of the light emitting device in the fingerprint identification area, and at least one fingerprint identification unit is stacked with one light emitting device in the fingerprint identification area.
According to the display panel provided by the invention, the fingerprint identification unit and the light emitting device are stacked and arranged on the light emitting device, so that the fingerprint identification unit does not need to occupy the space of the layer where the light emitting device is arranged, the resolution of the display panel can be prevented from being influenced by arranging the fingerprint identification unit, and the light emitting rate of the light emitting device can be prevented from being influenced by the fingerprint identification unit.
Preferably, the light emitting device comprises a first electrode, a light emitting layer and a second electrode which are sequentially arranged on one side of the substrate close to the fingerprint identification unit;
the fingerprint identification unit comprises a third electrode, a photosensitive layer and a fourth electrode which are sequentially arranged on one side of the light-emitting device, which is away from the substrate; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second electrode and the third electrode share a structure.
Preferably, the front projection of the photosensitive layer on the substrate is positioned in the front projection of the corresponding light-emitting layer on the substrate.
Preferably, a plurality of the fingerprint recognition units are uniformly distributed in the fingerprint recognition area.
Preferably, the fingerprint recognition units are in one-to-one correspondence with the light emitting devices located in the fingerprint recognition area.
Preferably, the display panel is divided into a display area and an edge area, the plurality of light emitting devices are arranged in the display area, at least one side of the edge area comprises a gate driving area, and a gate driving circuit is arranged in the gate driving area;
the display panel further includes a light emitting device driving line disposed at a side of the substrate adjacent to the plurality of light emitting devices and disposed in the gate driving region, the light emitting device driving line being connected to the second electrode.
Preferably, the display panel further includes a fingerprint recognition unit driving line disposed at a side of the substrate adjacent to the plurality of light emitting devices and disposed in the gate driving region, the fingerprint recognition unit driving line being connected to the fourth electrode; wherein, the liquid crystal display device comprises a liquid crystal display device,
the fingerprint identification unit driving line is arranged on one side of the light emitting device driving line, which is away from the display area.
Preferably, an insulating layer is disposed between the fingerprint recognition unit driving line and the light emitting device driving line.
Correspondingly, the manufacturing method of the display panel also comprises the following steps:
manufacturing a substrate;
manufacturing a plurality of light emitting devices on one side of the substrate;
and manufacturing a plurality of fingerprint identification units, wherein the fingerprint identification units are manufactured on one side, away from the substrate, of the light emitting device in the fingerprint identification area, and at least one fingerprint identification unit is stacked with one light emitting device in the fingerprint identification area.
Correspondingly, a display device is also provided, and the display device comprises the display panel.
Drawings
Fig. 1 is a schematic layer structure of an embodiment of a display panel according to the present embodiment;
fig. 2 is a schematic structural diagram of an embodiment of a display panel according to the present embodiment (mode one);
FIG. 3 is a second schematic diagram of an embodiment of a display panel according to the present embodiment (second mode);
FIG. 4 is a third schematic structural diagram of an embodiment of a display panel according to the present embodiment (a third mode);
FIG. 5 is a schematic diagram of a fourth embodiment of a display panel according to the present embodiment (mode four);
fig. 6 is a schematic diagram of a fingerprint identification working principle of the display panel according to the present embodiment;
fig. 7 is a flowchart of a method for manufacturing a display panel according to the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 be within the scope of the invention.
The shapes and sizes of the various components in the drawings are not to scale, but are merely intended to facilitate an understanding of the contents of the embodiments of the present invention.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As shown in fig. 1 and 2, the present embodiment provides a display panel including a fingerprint identification area. The display panel may be divided into a display area S1 and an edge area S2, and as illustrated in fig. 2, the area in the rectangular frame with thinner dotted line is the display area S1, the display area S1 includes a plurality of pixel units P, and the other areas of the display panel except the display area S1 are the edge areas S2. The fingerprint recognition area may be any area of the display panel, for example, if the display panel is a full-screen fingerprint recognition panel, the fingerprint recognition area is the display area S1 of the display panel, and of course, the fingerprint recognition area may also be a partial area of the display panel, for example, may be a lower side of the display area S1 of the display panel, which is not limited herein. The fingerprint recognition area of the display panel will be hereinafter described as the display area S1.
As shown in fig. 1 and 2, the display panel provided in this embodiment includes a substrate 1, a plurality of light emitting devices 2, and a plurality of fingerprint recognition units 3.
Specifically, a plurality of light emitting devices 2 are provided on the substrate 1 side. The display panel further comprises a plurality of gate lines G extending along the row direction and a plurality of data lines D extending along the column direction, wherein the gate lines G and the data lines D are staggered to define a pixel unit P, the pixel unit P comprises a light emitting device 2 and a thin film transistor 9, and the light emitting device 2 is connected with the corresponding gate lines G and the data lines D through the thin film transistor 9. A plurality of fingerprint recognition units 3 are provided on a side of the light emitting device 2 located in the fingerprint recognition area (e.g., the display area S1) facing away from the substrate 1, and at least one fingerprint recognition unit 3 is stacked with the light emitting device 2 located in the fingerprint recognition area.
In the display panel provided in this embodiment, since the fingerprint identification unit 3 is stacked with the light emitting device 2, the fingerprint identification unit 3 is disposed on the light emitting device 2, so that the fingerprint identification unit 3 does not need to occupy the space of the layer where the light emitting device 2 is disposed additionally, that is, the gap between the adjacent light emitting devices 2 can be set according to the requirement of resolution, and the space where the fingerprint identification unit 3 is disposed does not need to be reserved in the gap, thereby avoiding the influence on the resolution of the display panel due to the disposition of the fingerprint identification unit 3. And because fingerprint identification unit 3 sets up on light emitting device 2, consequently can avoid fingerprint identification unit 3 to set up when the layer that light emitting device 2 is located, shelter from the side circumstances of light emitting device 2 to can avoid influencing light emitting device's light extraction rate.
Further, as shown in fig. 1, the light emitting device 2 may include a first electrode 21, a light emitting layer (EML) 22, and a second electrode 23 sequentially disposed at a side of the substrate 1 near the fingerprint recognition unit 3. I.e. the first electrode 21 is arranged on the side of the substrate 1 close to the fingerprint recognition unit 3, the luminescent layer 22 is arranged on the side of the first electrode 21 close to the fingerprint recognition unit 3, and the second electrode 23 is arranged on the side of the luminescent layer 22 close to the fingerprint recognition unit 3.
Alternatively, as illustrated in fig. 1, the light emitting device 2 may further include a first Hole Transport Layer (HTL) 24 disposed between the first electrode 21 and the light emitting layer 22, and a first Electron Transport Layer (ETL) 25 disposed between the light emitting layer 22 and the second electrode 23.
Note that, the light emitting device 2 in the display panel provided in this embodiment may adopt a top emission structure or a bottom emission structure, which is not limited herein. In the following, a top emission structure is taken as an example of the light emitting device 2, and if the light emitting device 2 adopts the top emission structure, the first electrode 21 may be an Anode (Anode), and the second electrode 23 may be a Cathode (Cathode).
Further, as shown in fig. 1, the fingerprint recognition unit 3 may include a third electrode 31, a photosensitive layer 32, and a fourth electrode 33 sequentially disposed at a side of the light emitting device 2 facing away from the substrate 1. I.e. the third electrode 31 is arranged on the side of the light emitting device 2 facing away from the substrate 1, the photosensitive layer 32 is arranged on the side of the third electrode 31 facing away from the substrate 1, and the fourth electrode 33 may be arranged on the side of the photosensitive layer 32 facing away from the substrate 1. The photosensitive layer 32 is an Active layer, and if an object touches the display panel, the photosensitive layer 32 can sense the intensity of light reflected by the object, thereby realizing fingerprint identification. The third electrode 31 may be an anode (or cathode), and the corresponding fourth electrode 33 may be a cathode (or anode), which is not limited herein.
Alternatively, as described in fig. 1, the fingerprint recognition unit 3 may further include a second hole transport layer 34 disposed between the third electrode 31 and the photosensitive layer 32, and a second electron transport layer 35 disposed between the photosensitive layer 32 and the fourth electrode 33.
Alternatively, as shown in fig. 1, the second electrode 23 of the light emitting device 2 and the third electrode 31 of the fingerprint recognition unit 3 may share a structure in which one electrode layer is employed as both the second electrode 23 of the light emitting device 2 and the third electrode 31 of the fingerprint recognition unit 3. If the light emitting device 2 is top-emitting, the second electrode 23 is the cathode, the second electrode 23 is also the cathode of the fingerprint recognition unit 3, and the fourth electrode 33 of the fingerprint recognition unit 3 is the anode. If the light emitting device 2 is bottom emitting, the second electrode 23 is an anode, the second electrode 23 is also an anode of the fingerprint recognition unit 3, and the fourth electrode 33 of the fingerprint recognition unit 3 is a cathode. By sharing the electrode layer, the thickness of the display panel can be reduced, thereby contributing to the light and thin display panel.
Alternatively, the fingerprint recognition unit 3 is stacked with the light emitting device 2, i.e. the fingerprint recognition unit 3 is in contact with the light emitting device 2, and the front projection of the photosensitive layer 32 of the fingerprint recognition unit 3 on the substrate 1 is located within the front projection of the light emitting layer 22 of the corresponding light emitting device 2 on the substrate 1, i.e. the area of the front projection of the photosensitive layer 32 on the substrate 1 is smaller than or equal to the area of the front projection of the light emitting layer 22 on the substrate 1. Thereby, the edge of the photosensitive layer 32 of the fingerprint identification unit 3 can be prevented from exceeding the edge of the light emitting device 2 corresponding to the photosensitive layer, and the arrangement of the fingerprint identification unit 3 can be prevented from affecting the light emitting rate of the light emitting device 2 and the resolution of the display panel.
Alternatively, as shown in fig. 2 to 5, the fingerprint recognition units 3 may be disposed in a fingerprint recognition area (e.g., the display area S1) in a plurality of manners, so that in order to ensure the accuracy of fingerprint recognition, the plurality of fingerprint recognition units 3 need to be uniformly distributed in the fingerprint recognition area, and on this basis, one fingerprint recognition unit 3 may be disposed on the light emitting device 2 located in the fingerprint recognition area, or a plurality of fingerprint recognition units 3 may be disposed. The following is an example.
A mode one,
As shown in fig. 2, the fingerprint recognition units 3 are in one-to-one correspondence with the light emitting devices 2 located in the fingerprint recognition area, that is, in the fingerprint recognition area, one light emitting device 2 is stacked with one fingerprint recognition unit 3, and the fingerprint recognition units 3 are uniformly distributed on each light emitting device 2 in the fingerprint recognition area.
A second mode,
As shown in fig. 3, the fingerprint recognition units 3 are arranged at intervals on the light emitting device 2 located in the fingerprint recognition area, i.e., adjacent fingerprint recognition units 3 are arranged at intervals on the light emitting device 2, and only one fingerprint recognition unit 3 is arranged on the light emitting device 2. Taking three adjacent light emitting devices 2 as an example, the light emitting devices 2 positioned in the middle are not provided with fingerprint identification units 3, and the light emitting devices 2 positioned at two sides are respectively provided with one fingerprint identification unit 3.
Mode III,
As shown in fig. 4, each light emitting device 2 located in the fingerprint recognition area is provided with fingerprint recognition units 3, so that the fingerprint recognition units 3 are uniformly distributed in the fingerprint recognition area, and one light emitting device 2 is provided with two fingerprint recognition units 3, thereby increasing the fingerprint recognition accuracy.
Mode four,
As shown in fig. 5, the fingerprint recognition units 3 are provided on the light emitting device 2 located in the fingerprint recognition area at intervals, and two fingerprint recognition units 3 are provided on the light emitting device 2. Taking three adjacent light emitting devices 2 as an example, the fingerprint identification units 3 are not arranged on the light emitting devices 2 positioned in the middle, and two fingerprint identification units 3 are arranged on each light emitting device 2 in the light emitting devices 2 positioned at two sides.
Of course, the above-mentioned embodiments are merely examples of the arrangement modes of the fingerprint recognition units 3, and the fingerprint recognition units 3 may be arranged in more ways, for example, the fingerprint recognition units 3 may be arranged at intervals of a plurality of light emitting devices 2, more fingerprint recognition units 3 may be arranged on one light emitting device 2, and the specific arrangement mode of the fingerprint recognition units 3 and the number of the fingerprint recognition units 3 arranged on one light emitting device 2 may be set according to the precision required for fingerprint recognition, so long as the fingerprint recognition units 3 are uniformly distributed in the fingerprint recognition area, which is not limited herein.
As shown in fig. 6, if a finger touches the surface of the screen 002 of the display panel, the light emitted from the light emitting layer 22 of the light emitting device 2 will pass through the photosensitive layer 32 of the fingerprint recognition unit 3 to form an initial current I 0 After that, the light is transmitted to the outside, and reflected back to the display panel after touching the finger, and passes through the photosensitive layer 32 of the fingerprint recognition unit 3 again to form a secondary current I 1 Since the fingerprint of the finger surface is rugged, the fingerprint has valley portions and ridge portions, so that the intensities of the light reflected by different positions of the fingerprint of the finger are different, and the secondary current I formed by different lights 1 The light emitted from the same light emitting device 22 passes through the initial current I formed by the photosensitive layer 32 0 The size of (2) remains relatively constant and thus is determined by I 1 I of (2) 0 The fingerprint information can be identified by the difference value of the display panel, so that the fingerprint identification function of the display panel is realized.
Further, as shown in fig. 1 and 2, the display panel provided in this embodiment may be divided into a display area S1 and an edge area S2, a plurality of light emitting devices 2 are disposed in the display area S1, the edge area S1 may be used to dispose a pixel driving circuit, the edge area S2 is disposed around the display area S1, at least one side of the edge area S2 includes a gate driving region S21, a gate driving circuit (Gate Driver on Array, GOA) 001 is disposed in the gate driving region 21, and a plurality of gate lines G are connected to the GOA 001.
Further, the display panel provided in the present embodiment as shown in fig. 1 further includes a light emitting device driving (VSS) line 4 disposed on a side of the substrate 1 adjacent to the plurality of light emitting devices 2, and the VSS line 4 may be disposed in the gate driving region S21, the VSS line 4 being connected to the second electrodes 23 of the plurality of light emitting devices 2 for supplying an operating voltage to the light emitting devices 2. The VSS lines 4 are disposed in the gate driving region S21, so that the driving lines can be prevented from occupying the display region S1.
Further, as shown in fig. 1, the display panel provided in this embodiment further includes a fingerprint identification unit driving line 5, which is disposed on a side of the substrate 1 near the plurality of light emitting devices 2, and the fingerprint identification unit driving line 5 is disposed in the gate driving region, where the fingerprint identification unit driving line 5 is connected to the fourth electrode 33 of the fingerprint identification unit 3 and is used for providing an operating voltage to the fingerprint identification unit 3, and the position of the driving line occupying the display area S1 can be further avoided by disposing the fingerprint identification unit driving line 5 in the gate driving region S21. In order to separate the fingerprint identification unit driving line 5 from the VSS line 4, the fingerprint identification unit driving line 5 is disposed on a side of the VSS line 4 away from the display area S1, i.e., the fingerprint identification unit driving line 5 is closer to the display panel than the VSS line 4, and accordingly, the fourth electrode 4 of the fingerprint identification unit 3 may extend to a position of the fingerprint identification unit driving line 5 in the gate driving area S21 and overlap with the fingerprint identification unit driving line 5, and the second electrode 23 of the light emitting device 2 may extend to a position of the VSS line 4 in the gate driving area S21 and overlap with the VSS line 4.
Further, as shown in fig. 1, an insulating layer 6 is provided between the fingerprint recognition unit driving line 5 and the light emitting device driving line 4 to avoid crosstalk of signals of OPD 5 and VSS 4. The insulating layer 6 may be provided at any position, for example, between the second electrode 23 and the fourth electrode 33.
Further, the insulating layer 6 may be an inorganic insulating layer, so that the step of forming the inorganic insulating layer may be combined with the step of forming other inorganic film layers in the display panel, reducing the production process of the display panel. The material of the inorganic insulating layer may be, for example, molybdenum trioxide or silicon oxynitride.
Alternatively, in the display panel provided in the present embodiment, the light emitting device 2 may be various types of light emitting devices, for example, the light emitting device 2 is an organic light emitting semiconductor (OrganicElectroluminesence Display, OLED), and accordingly, the fingerprint recognition unit 3 is a type of photosensitive device corresponding to the light emitting device 2, for example, the fingerprint recognition unit 3 may be an Organic Photodetector (OPD).
Further, as shown in fig. 1, the display panel provided in this embodiment further includes an interlayer insulating layer (PVX) 7 disposed on a side of the substrate 1 near the light emitting device 2, a thin film transistor 9 is disposed in the interlayer insulating layer 7, and the first electrode 21 of the light emitting device 2 is connected to the thin film transistor 9 through a Via (Via) disposed in the interlayer insulating layer 7. On the side of the interlayer insulating layer 7 facing away from the substrate 1, and between the plurality of light emitting devices 2, a Pixel Defining Layer (PDL) 8 is further provided, the light emitting devices 2 being provided in the pixel defining layer 8. Specifically, the thin film transistor 9 may include a plurality of film layers, for example, including a Gate Electrode (Gate Electrode), the Gate Electrode is disposed on a side of the substrate 1 adjacent to the light emitting device 2, an active layer (active area) is disposed above the Gate Electrode, a Gate insulating layer is disposed between the active layer and the Gate Electrode, a Drain Electrode (Drain Electrode) and a Source Electrode (Source Electrode) are disposed on a side of the active layer away from the Gate insulating layer, the Drain Electrode and the Source Electrode are disposed on the same layer, and an interlayer insulating layer is disposed between the Drain Electrode and the Source Electrode. The active layer is made of a semiconductor material, and may be amorphous silicon, polysilicon, an organic semiconductor material, or the like, for example, without limitation. Of course, the layer structure of the display panel may also be other structures, for example, may include 3 thin film transistors, and may be specifically designed according to needs, which is not limited herein.
Correspondingly, the manufacturing method of the display panel also comprises the following steps:
s1, manufacturing a substrate 1.
Specifically, the substrate 1 may include various types of substrates, such as a glass substrate, a silicon substrate, and the like, without limitation.
S2, a plurality of light emitting devices 2 are fabricated on the substrate 1 side.
Specifically, the processes of exposure, development, film removal, etching and the like complete the back plate of the display panel, and the light emitting device driving line 4 and the fingerprint identification unit driving line 5 are manufactured in the gate driving region S21 of the edge region S2, wherein the fingerprint identification unit driving line 5 is manufactured on the side of the light emitting device driving line 4 facing away from the display region S1.
Further, in the display area S2, including forming the thin film transistor 9, the PVX layer 7 on the substrate 1, sequentially preparing at least each film layer of the light emitting device 2 on the PVX layer 7, specifically, sequentially evaporating the first electrode 21, the first hole transport layer 24, the light emitting layer 22, the first electron transport layer 25, and the second electrode 23 in a direction in which the PVX layer 7 is away from the substrate 1. The vapor deposition ranges of the first hole transport layer 24, the light emitting layer 22 and the first electron transport layer 25 cannot contact the light emitting device driving line 4, and the vapor deposition range of the second electrode 23 must overlap the light emitting device driving line 4.
S3, manufacturing a plurality of fingerprint identification units 3, wherein the fingerprint identification units 3 are manufactured on one side, away from the substrate 1, of the light emitting device 2 located in the fingerprint identification area, and at least one fingerprint identification unit 3 is stacked with the light emitting device 1 located in the fingerprint identification area.
Specifically, taking the fingerprint identification unit 3 and the light emitting device 2 as an example to share the second electrode 23, the second electron transport layer 34, the photosensitive layer 32 and the second hole transport layer 35 are sequentially deposited on the second electrode 23 in a direction away from the substrate 1, and the deposition range of the film layer cannot exceed the position of the driving line 4 of the light emitting device.
Further, an insulating layer (such as a molybdenum trioxide insulating layer) is deposited between the light emitting device driving line 4 and the fingerprint recognition unit driving line 5 by using a Mask (Mask), or an insulating layer (such as a silicon oxynitride insulating layer) is deposited by a chemical deposition method.
Further, a fourth electrode 33 is evaporated on the side of the second hole transport layer 35 away from the substrate 1 by using a mask, or a transparent second electrode 33 is spin-coated, and the evaporation range or spin-coating range of the second electrode 33 needs to be lapped on the fingerprint identification unit driving line 5.
Alternatively, a transparent inorganic metal oxide such as ITO, inZnO, znO or the like may be used as the material of the second electrode 33, and a solution-processable organic material such as PEDOT: PSS or the like may be used as the material of the second electrode 33.
Correspondingly, the embodiment also provides a display device which comprises the display panel. The display device may be: any product or component with 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 are not described herein in detail, nor should they be considered as limiting the invention.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (9)
1. A display panel comprising a display area and an edge area, the edge area being disposed around the display area; the display area comprises a fingerprint identification area; characterized by comprising the following steps:
a substrate;
a plurality of light emitting devices disposed at one side of the substrate;
the fingerprint identification units are arranged on one side, away from the substrate, of the light emitting devices in the fingerprint identification area, and at least one fingerprint identification unit is stacked with one light emitting device in the fingerprint identification area;
the plurality of light emitting devices are disposed within the display area; at least one side of the edge region comprises a gate driving region, and a gate driving circuit is arranged in the gate driving region;
the light-emitting device comprises a first electrode, a light-emitting layer and a second electrode which are sequentially arranged on one side of the substrate close to the fingerprint identification unit; the display panel further comprises a light emitting device driving line which is arranged on one side of the substrate close to the plurality of light emitting devices and is arranged in the grid driving area, and the light emitting device driving line is connected with the second electrode;
the fingerprint identification unit comprises a third electrode, a photosensitive layer and a fourth electrode which are sequentially arranged on one side of the light-emitting device, which is away from the substrate; the display panel further comprises a fingerprint identification unit driving line which is arranged on one side of the substrate close to the plurality of light emitting devices and in the gate driving area, and the fingerprint identification unit driving line is connected with the fourth electrode.
2. The display panel of claim 1, wherein the second electrode and the third electrode share a structure.
3. The display panel of claim 2, wherein the front projection of the photosensitive layer onto the substrate is within the front projection of the light emitting layer corresponding thereto onto the substrate.
4. The display panel of claim 1, wherein a plurality of the fingerprint recognition units are uniformly distributed within the fingerprint recognition area.
5. The display panel according to claim 4, wherein the fingerprint recognition units are in one-to-one correspondence with the light emitting devices located in the fingerprint recognition area.
6. The display panel of claim 1, wherein the fingerprint recognition unit drive line is disposed on a side of the light emitting device drive line facing away from the display area.
7. The display panel according to claim 6, wherein an insulating layer is provided between the fingerprint recognition unit driving line and the light emitting device driving line.
8. The manufacturing method of the display panel comprises the steps that the display panel comprises a display area and an edge area, and the edge area is arranged around the display area; the display area comprises a fingerprint identification area; the manufacturing method of the display panel is characterized by comprising the following steps:
manufacturing a substrate;
manufacturing a plurality of light emitting devices in a display area at one side of the substrate;
a plurality of fingerprint identification units are manufactured, wherein the fingerprint identification units are manufactured on one side, away from the substrate, of the light emitting device in the fingerprint identification area, and at least one fingerprint identification unit is stacked with one light emitting device in the fingerprint identification area; the fingerprint identification unit is manufactured by sequentially forming a third electrode, a photosensitive layer and a fourth electrode on one side of the light-emitting device, which is away from the substrate;
the manufacturing of the light-emitting device comprises the steps of sequentially forming a first electrode, a light-emitting layer and a second electrode on one side of the substrate, which is close to the fingerprint identification unit;
at least one side of the edge region comprises a gate driving region, and a gate driving circuit is manufactured in the gate driving region;
manufacturing a light emitting device driving line in the gate driving region on one side of the substrate close to the plurality of light emitting devices; the light emitting device driving line is connected with the second electrode;
manufacturing fingerprint identification unit driving lines in the grid driving area on one side of the substrate close to the plurality of light emitting devices; the fingerprint recognition unit driving line is connected with the fourth electrode.
9. A display device comprising the display panel of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010322103.5A CN111509009B (en) | 2020-04-22 | 2020-04-22 | Display panel, manufacturing method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010322103.5A CN111509009B (en) | 2020-04-22 | 2020-04-22 | Display panel, manufacturing method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111509009A CN111509009A (en) | 2020-08-07 |
| CN111509009B true CN111509009B (en) | 2023-07-14 |
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| CN108288639A (en) * | 2018-01-26 | 2018-07-17 | 京东方科技集团股份有限公司 | A kind of display panel, its production method and display device |
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| CN106201142A (en) * | 2016-07-15 | 2016-12-07 | 京东方科技集团股份有限公司 | A kind of In-cell touch panel, its driving method and display device |
| CN109411504A (en) * | 2017-08-16 | 2019-03-01 | 固安翌光科技有限公司 | OLED screen body and optical fingerprint identification device as fingerprint identification device light source |
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