CN114373793A

CN114373793A - Display panel and display device

Info

Publication number: CN114373793A
Application number: CN202111566712.6A
Authority: CN
Inventors: 李国鹏; 杨新帅; 邹敏; 王隽
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-04-19

Abstract

The invention discloses a display panel and a display device. The display panel comprises a fingerprint identification area and a non-fingerprint identification area; the display panel further includes: a pixel defining layer disposed on one side of the substrate base, the pixel defining layer including a plurality of openings for receiving the sub-pixel units and a spacer; the packaging layer is arranged on one side of the pixel limiting layer and the side, far away from the substrate, of the sub-pixel unit; the color filter layer is arranged on one side of the packaging layer, which is far away from the pixel limiting layer and the sub-pixel unit, and comprises a light shading layer arranged corresponding to the separating body and a color resistor arranged corresponding to the sub-pixel unit; the light shielding layer positioned in the fingerprint identification area at least comprises a first light shielding area, and the first light shielding area at least comprises an infrared quantum dot layer; after visible light that sends at the sub-pixel unit reflected infrared quantum dot layer through the fingerprint, infrared quantum dot layer sent the infrared light and shines to the fingerprint identification module. The scheme can realize the fingerprint identification function while ensuring that the reflectivity of the display panel is not improved.

Description

Display panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.

Background

With the continuous development of display technologies, the underscreen fingerprints are gradually applied to the display screen as a new technical breakthrough of the touch display screen. The fingerprint under the screen is that a fingerprint identification sensor is integrated under the display screen, and the fingerprint identification sensor responds to the touch operation of a user on a preset position in the display screen and collects fingerprint information of the user. The fingerprint information can be used for fingerprint identification in the scenes of payment or unlocking and the like.

In order to improve the transmittance of the display screen and reduce the power consumption, the conventional display screen usually adopts a structure of a light shielding layer and a color resistor to replace the conventional polarizer. However, since the light shielding layer is usually made of an opaque material, if the function of fingerprint identification under the display screen is to be implemented, the light shielding layer needs to be perforated to provide a fingerprint identification light path, which may result in an increase in reflectivity and a decrease in contrast of the display screen, and may affect the display effect.

Disclosure of Invention

The invention provides a display panel and a display device, which can realize the function of identifying fingerprints under a screen of the display panel while ensuring that the reflectivity of the display panel is not improved.

In a first aspect, an embodiment of the present invention provides a display panel, where the display panel includes a fingerprint identification area and a non-fingerprint identification area; the display panel further includes:

a pixel defining layer disposed on one side of the substrate base, the pixel defining layer including a plurality of openings for receiving the sub-pixel units and a spacer;

the packaging layer is arranged on one side of the pixel limiting layer and the side, far away from the substrate, of the sub-pixel unit;

the color filter layer is arranged on one side of the packaging layer, which is far away from the pixel limiting layer and the sub-pixel unit, and comprises a light shading layer arranged corresponding to the separating body and a color resistor arranged corresponding to the sub-pixel unit;

the light shielding layer positioned in the fingerprint identification area at least comprises a first light shielding area, and the first light shielding area at least comprises an infrared quantum dot layer;

after visible light that sends at the sub-pixel unit reflected infrared quantum dot layer through the fingerprint, infrared quantum dot layer sent the infrared light and shines to the fingerprint identification module.

Optionally, the light-shielding layer in the fingerprint identification area further includes a second light-shielding area;

preferably, the first light-shielding region is a region corresponding to the fingerprint identification module, and the second light-shielding region is a region of the light-shielding layer other than the first light-shielding region.

Optionally, the second light-shielding region is made of a black light-shielding material;

the shading layer positioned in the non-fingerprint identification area is made of black shading materials.

In the display panel, optionally, the light-shielding layer further includes: and the light control layer is arranged on one side of the infrared quantum dot layer, which is far away from the packaging layer, or on one side of the infrared quantum dot layer, which is close to the packaging layer.

Optionally, the light control layer includes a plurality of super-structure lenses, and one super-structure lens corresponds to one fingerprint identification sensor in the fingerprint identification module;

preferably, the super-structured lens comprises a plurality of nano-antennas arranged in an array;

preferably, the shape of the nano antenna is at least one of a cuboid, a cylinder, a three-dimensional T shape and a three-dimensional V shape;

preferably, when the shape of the nano antenna is a cuboid, the length, the width and the height of the nano antenna are all in the range of 700-1500nm, the placing angle of the nano antenna is in the range of 0-360 °, and the distance between two adjacent nano antennas is greater than or equal to 800 nm.

Optionally, the light control layer includes a plurality of microlenses, and one microlens corresponds to one fingerprint identification sensor in the fingerprint identification module;

preferably, the micro lens comprises a first lens unit and a second lens unit which are mutually matched, and the matched surface of the first lens unit and the second lens unit is a convex surface;

preferably, when the convex surface of the first lens unit faces the light-emitting direction, the refractive index of the second lens unit is greater than that of the first lens unit; when the convex surface of the first lens unit deviates from the light emitting direction, the refractive index of the first lens unit is larger than that of the second lens unit.

In the display panel, optionally, the light-shielding layer further includes: the visible light resistance interlayer is arranged on one side of the infrared quantum dot layer close to the packaging layer and is used for transmitting infrared light and blocking visible light;

preferably, the material of the visible light barrier layer is at least one of gallium arsenide GaAs, cadmium telluride CdTe, silicon Si and germanium Ge.

As above, optionally, the color filter layer further includes:

the first buffer layer is arranged on one side of the light shielding layer and the color resistor close to the packaging layer; and/or the presence of a gas in the gas,

the second buffer layer is arranged on one side of the light shielding layer and the color resistor, which is far away from the packaging layer;

preferably, the first buffer layer includes scattering particles therein.

In the display panel as above, optionally, the infrared quantum dot layer is made of an infrared quantum dot material;

preferably, the light-emitting wavelength of the infrared quantum dot material is in the range of 800nm-2000 nm;

preferably, the luminescent wavelength of the infrared quantum dot material is 940 nm;

preferably, the infrared quantum dot material is at least one of lead sulfide PbS, lead selenide PbSe, lead telluride PbTe and cadmium telluride CdTe.

In a second aspect, an embodiment of the present invention further provides a display device, which includes a display panel having any one of the features of the first aspect.

The invention provides a display panel and a display device.A light shielding layer positioned in a fingerprint identification area is designed, and the light shielding layer does not need to be perforated, so that the problems of improved reflectivity and reduced contrast of the display panel caused by perforation are solved; simultaneously, the light shield layer includes first light shield area at least, and first light shield area includes infrared quantum dot layer at least, and after the visible light that sends at the sub-pixel unit passed through fingerprint reflection to infrared quantum dot layer, infrared quantum dot layer sent the infrared light and shined to the fingerprint identification module to display panel's fingerprint identification function under the screen has been realized.

Drawings

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;

fig. 3 is a schematic diagram of a display panel according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another display panel according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a top view of a super lens according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a microlens according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Also, the drawings and description of the embodiments are to be regarded as illustrative in nature, and not as restrictive. Like reference numerals refer to like elements throughout the specification. In addition, the thickness of some layers, films, panels, regions, etc. may be exaggerated in the drawings for understanding and ease of description. It will also be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, "on … …" means that an element is positioned on or under another element, but does not essentially mean that it is positioned on the upper side of the other element according to the direction of gravity. For ease of understanding, the figures of the present invention depict one element on top of another.

Additionally, unless explicitly described to the contrary, the word "comprise", and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

It should also be noted that references to "and/or" in embodiments of the invention are intended to include any and all combinations of one or more of the associated listed items. Various components are described in embodiments of the present invention with "first", "second", "third", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.

Next, the structures of the display panel, the display device, and the technical effects thereof will be described in detail.

In addition, in the following embodiments, the display panel is illustrated as being rectangular, and the fingerprint identification area is illustrated as being circular, in practical applications, the display panel may also be in a regular or irregular shape such as a circle or a polygon, and the fingerprint identification area may also be in a regular or irregular shape such as a rectangle or a droplet, which is not limited in particular by the present invention.

Fig. 1 is a schematic diagram illustrating a top view structure of a display panel according to an embodiment of the present invention, as shown in fig. 1, the display panel includes a display area AA and a non-display area NAA adjacent to the display area AA, where the non-display area NAA surrounds the display area AA in fig. 1. The display area AA is an area of the display panel for displaying a picture; the non-display area NAA generally includes peripheral driving elements, peripheral traces, and a fan-out area. Optionally, in order to implement a narrow bezel, if the display panel is a flexible display panel, the non-display area NAA may further include a bending area and a non-bending area, the bending area is located between the non-bending area and the display area AA, and the bezel area (located in the non-display area) of the display panel may be folded back to the back of the display panel.

The display panel has an off-screen fingerprint identification function, and therefore, the display area AA includes a fingerprint identification area 10 and a non-fingerprint identification area 11; wherein, be provided with the fingerprint identification module in fingerprint identification district 10, the fingerprint identification module includes at least one fingerprint identification sensor, and in the embodiment of the invention, the fingerprint identification sensor is infrared identification fingerprint identification sensor. The display panel can display pictures and realize a fingerprint identification function, so that the display panel can realize comprehensive screen design and reduce frames.

In a first exemplary implementation manner, fig. 2 illustrates a schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present invention, and as shown in fig. 2, the display panel includes: a substrate base plate 100, a pixel defining layer 200 disposed at one side of the substrate base plate 100, the pixel defining layer 200 including a spacer 210 and a plurality of openings 220 (portions indicated by arrows in fig. 2) for receiving the sub-pixel units 300; an encapsulation layer 400 disposed on the side of the pixel defining layer 200 and the sub-pixel unit 300 away from the substrate 100; a color filter layer 500 disposed on a side of the encapsulation layer 400 away from the pixel defining layer 200 and the sub-pixel unit 300, the color filter layer 500 including a light shielding layer 51 disposed corresponding to the partition 210 and a color resist 52 disposed corresponding to the sub-pixel unit 300.

The sub-pixel unit 300 may sequentially include, in a direction away from the substrate base 100: the light-emitting diode comprises an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and a cathode. The sub-pixel units 300 can emit light of N different colors, that is, the sub-pixel units 300 are divided into N types, and each of the N types of sub-pixel units 300 is combined to form a pixel unit; n is not less than 3 and is an integer. For example, the sub-pixel unit 300 may include a first color sub-pixel unit emitting blue light, a second color sub-pixel unit emitting red light, and a third color sub-pixel unit emitting green light.

Accordingly, the color resists 52 are divided into N different colors, each color corresponding to the color of light emitted by the sub-pixel elements 300. For example, the color resists 52 include a first color resist, a second color resist, and a third color resist, wherein the first color sub-pixel unit corresponds to the first color resist, the second color sub-pixel unit corresponds to the second color resist, and the third color sub-pixel unit corresponds to the third color resist. The color filter layer 500 can replace a polarizer, thereby avoiding the problem that the light-emitting efficiency of the display panel is reduced due to the polarization principle of the polarizer, and reducing the manufacturing cost of the display panel.

In an embodiment, in the fingerprint identification area 10, the fingerprint identification module 600 is disposed corresponding to the light shielding layer 51, that is, the orthographic projection of the light shielding layer 51 on the substrate 100 at least covers the orthographic projection of the fingerprint identification module 600 on the substrate 100.

Specifically, the light shielding layer 51 located in the fingerprint identification area 10 at least includes a first light shielding area 51 a. Optionally, the light shielding layer 51 in the fingerprint identification area 10 further includes a second light shielding area 51 b. The first light-shielding region 51a is a region corresponding to the fingerprint identification module 600, and the second light-shielding region 51b is a region of the light-shielding layer 51 except the first light-shielding region 51 a.

Because fingerprint identification module 600 sets up in fingerprint identification district 10, consequently, as shown in fig. 2, to fingerprint identification district 10, light shield layer 51 mainly includes the first region 51a that shades light that corresponds fingerprint identification module 600 and sets up. In order to ensure the accuracy of the fingerprint identification function under the screen, the orthographic projection of the first light-shielding region 51a on the substrate 100 at least covers the orthographic projection of the fingerprint identification module 600 on the substrate 100. The second light-shielding region 51b is located around the first light-shielding region 51a, and the second light-shielding region 51b is made of a black light-shielding material, i.e., the second light-shielding region 51b is a conventional Black Matrix (BM). The size of the second light-shielding region 51b is affected by the size of the first light-shielding region 51 a.

In the same way, because fingerprint identification module 600 is not set up in non-fingerprint identification district 11, consequently, as shown in fig. 2, to non-fingerprint identification district 11, light shield layer 51 adopts black shading material preparation, and the light shield layer in non-fingerprint identification district 11 is traditional black matrix promptly. Therefore, the manufacturing cost of the display panel can be reduced.

In one embodiment, the first light-shielding region 51a includes at least an infrared quantum dot layer 71. After the visible light emitted from the sub-pixel unit 300 is reflected to the infrared quantum dot layer 71 through the fingerprint, the infrared quantum dot layer 71 emits infrared light to the fingerprint identification module 600. In order to secure optical characteristics, the thickness of the infrared quantum dot layer 71 is generally less than or equal to 15 μm.

Fig. 3 shows a working schematic diagram of a display panel according to an embodiment of the present invention, as shown in fig. 3, visible light emitted by the sub-pixel unit 300 is reflected to the infrared quantum dot layer 71 through a fingerprint, the visible light excites the infrared quantum dot layer 71 to emit infrared light, and the infrared light is then irradiated to the fingerprint identification module 600, so as to implement an under-screen fingerprint identification function of the display panel. In addition, the light-shielding layer 51 does not need to be perforated, thereby avoiding the problems of the improvement of the reflectivity of the display panel and the reduction of the contrast caused by the perforation.

In one embodiment, the infrared quantum dot layer is made of an infrared quantum dot material. The light-emitting wavelength of the infrared quantum dot material is in the range of 800nm-2000nm, and optionally, the light-emitting wavelength of the infrared quantum dot material is 940 nm. Optionally, the infrared quantum dot material is at least one of lead sulfide PbS, lead selenide PbSe, lead telluride PbTe, and cadmium telluride CdTe.

In an embodiment, the light-shielding layer of the first light-shielding region 51a may further include: a light control layer 72; the light control layer 72 is disposed on a side of the infrared quantum dot layer 71 away from the encapsulation layer 400 (as shown in fig. 2); or the light control layer 72 is disposed on the side of the infrared quantum dot layer 71 near the encapsulation layer 400.

Light control layer 72 is used for focusing the visible light that the fingerprint reflects back to project the focus to fingerprint identification module 600, with the resolution ratio that improves fingerprint identification formation of image.

Further, the light-shielding layer of the first light-shielding region 51a may further include: the light blocking layer 73 is visible. As shown in fig. 2, the visible light blocking layer 73 is disposed on the side of the infrared quantum dot layer 71 near the encapsulation layer 400.

The visible light blocking layer 73 serves to transmit infrared light and block visible light. That is, the visible light blocking layer 73 can prevent the visible light emitted by the sub-pixel unit 300 from directly exciting the infrared quantum dot layer 71, thereby avoiding the interference of the visible light on the fingerprint identification and improving the sensitivity of the fingerprint identification module 600.

The material of the visible light barrier layer is at least one of gallium arsenide GaAs, cadmium telluride CdTe, silicon Si and germanium Ge.

It should be added that when the light control layer 72 is disposed on the side of the infrared quantum dot layer 71 close to the package layer 400, the light control layer 72 may be disposed between the visible light blocking layer 73 and the infrared quantum dot layer 71, or between the visible light blocking layer 73 and the package layer, which is not limited in this embodiment of the invention.

In an embodiment, with continued reference to fig. 2, the color filter layer 500 further includes: the first buffer layer 53 and/or the second buffer layer 54.

The first buffer layer 53 is disposed on the side of the light-shielding layer 51 and the color resistor 52 close to the encapsulating layer 400, and the first buffer layer 53 can improve the adhesion and film-forming property between the encapsulating layer 400 and the light-shielding layer 51; the second buffer layer 54 is disposed on a side of the light-shielding layer 51 and the color resists 52 away from the encapsulation layer 400, and the second buffer layer 54 can perform planarization and protection functions.

Optionally, including scattering particle 80 in first buffer layer 53, scattering particle 80 can improve display panel's optical characteristic, with infrared light uniform scattering to fingerprint identification module 600, promotes fingerprint identification module 600's the degree of accuracy. For example, the scattering particles 80 may be made of a material selected from titanium dioxide, zirconium dioxide, and the like.

In a second exemplary implementation manner, fig. 4 shows a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, and as shown in fig. 4, the display panel includes: a substrate base plate 100, a pixel defining layer 200 disposed at one side of the substrate base plate 100, the pixel defining layer 200 including a spacer 210 and a plurality of openings 220 (portions indicated by arrows in fig. 4) for receiving the sub-pixel units 300; an encapsulation layer 400 disposed on the side of the pixel defining layer 200 and the sub-pixel unit 300 away from the substrate 100; a color filter layer 500 disposed on a side of the encapsulation layer 400 away from the pixel defining layer 200 and the sub-pixel unit 300, the color filter layer 500 including a light shielding layer 51 disposed corresponding to the partition 210 and a color resist 52 disposed corresponding to the sub-pixel unit 300.

Specifically, the light shielding layer 51 located in the fingerprint identification area 10 includes a first light shielding region 51 a. The first light-shielding region 51a is a region corresponding to the fingerprint identification module 600.

Because fingerprint identification module 600 sets up in fingerprint identification district 10, consequently, as shown in fig. 4, to fingerprint identification district 10, light shield layer 51 mainly includes the first region 51a that shades light that corresponds fingerprint identification module 600 and sets up. In order to ensure the accuracy of the fingerprint identification function under the screen, the orthographic projection of the first light-shielding region 51a on the substrate 100 at least covers the orthographic projection of the fingerprint identification module 600 on the substrate 100.

In the same way, because fingerprint identification module 600 is not set up in non-fingerprint identification district 11, consequently, as shown in fig. 4, to non-fingerprint identification district 11, light shield layer 51 adopts black shading material preparation, and the light shield layer in non-fingerprint identification district 11 is traditional black matrix promptly. Therefore, the manufacturing cost of the display panel can be reduced.

The light-shielding layer 51 (i.e., the first light-shielding region 51a) in the fingerprint identification region 10 includes at least an infrared quantum dot layer 71. After the visible light emitted from the sub-pixel unit 300 is reflected to the infrared quantum dot layer 71 through the fingerprint, the infrared quantum dot layer 71 emits infrared light to the fingerprint identification module 600. In order to secure optical characteristics, the thickness of the infrared quantum dot layer 71 is generally less than or equal to 15 μm.

Fig. 5 shows a working schematic diagram of another display panel according to an embodiment of the present invention, as shown in fig. 5, visible light emitted by the sub-pixel unit 300 is reflected to the infrared quantum dot layer 71 through a fingerprint, the visible light excites the infrared quantum dot layer 71 to emit infrared light, and the infrared light is then irradiated to the fingerprint identification module 600, so as to implement an under-screen fingerprint identification function of the display panel. In addition, the light-shielding layer 51 does not need to be perforated, thereby avoiding the problems of the improvement of the reflectivity of the display panel and the reduction of the contrast caused by the perforation.

In an embodiment, the light-shielding layer of the first light-shielding region 51a may further include: a light control layer 72; the light control layer 72 is disposed on a side of the infrared quantum dot layer 71 away from the encapsulation layer 400 (as shown in fig. 4); or the light control layer 72 is disposed on the side of the infrared quantum dot layer 71 near the encapsulation layer 400.

Further, the light-shielding layer of the first light-shielding region 51a may further include: the light blocking layer 73 is visible. As shown in fig. 4, the visible light blocking layer 73 is disposed on the side of the infrared quantum dot layer 71 near the encapsulation layer 400.

In an embodiment, with continued reference to fig. 4, the color filter layer 500 further includes: the first buffer layer 53 and/or the second buffer layer 54.

For the two exemplary embodiments described above, the light control layer 72 may be implemented by selecting a super-structured lens or a micro-lens.

When the light control layer 72 selects a super-structure lens to implement, the light control layer 72 includes a plurality of super-structure lenses, and one super-structure lens corresponds to one fingerprint identification sensor in the fingerprint identification module 600.

Fig. 6 is a schematic top view of a super lens according to an embodiment of the present invention. As shown in fig. 6, a super-structured lens includes a plurality of nano-antennas a arranged in an array; the shape of the nano antenna A is at least one of a cuboid, a cylinder, a three-dimensional T shape and a three-dimensional V shape.

When the shape of the nano antenna A is a cuboid, the length, the width and the height of the nano antenna A are all in the range of 700-1500nm, the placing angle of the nano antenna A is in the range of 0-360 degrees, and the distance between two adjacent nano antennas A is larger than or equal to 800 nm.

It can be understood that the placing angle of the nano antenna a is an included angle between the orthographic projection of the nano antenna a on the substrate 100 and any side edge of the substrate 100; the distance between two adjacent nano antennas a refers to the distance between the center points of two adjacent nano antennas a.

The material of the nano antenna A is selected from materials which can transmit infrared light and absorb visible light. For example, the material of the nano-antenna a is any one of gallium arsenide GaAs, cadmium telluride CdTe, silicon Si, and germanium Ge.

When the light control layer 72 selects a microlens to implement, the light control layer 72 includes a plurality of microlenses, and one microlens corresponds to one fingerprint identification sensor in the fingerprint identification module 600.

Fig. 7 is a schematic cross-sectional view illustrating a microlens according to an embodiment of the present invention. As shown in fig. 7, the microlens includes a first lens unit B1 and a second lens unit B2 that face each other, and a face of the first lens unit B1 that faces the second lens unit B2 is convex.

The bottom surface shape of the microlens is designed in accordance with the opening shape of the infrared quantum dot layer 71, and generally, the bottom surface shape of the microlens is circular. Referring to fig. 7, when the bottom surface of the microlens is circular in shape, the ratio of the diameter d of the bottom surface of the microlens to the height h of the first lens unit B1 is in the range of 2-40. The overall height h1 of the microlens is > the height h of the first lens unit B1.

When the convex surface of the first lens unit B1 faces the light exit direction, the refractive index of the second lens unit B2 is greater than the refractive index of the first lens unit B1; when the convex surface of the first lens unit B1 faces away from the light exit direction, the refractive index of the first lens unit B1 is greater than the refractive index of the second lens unit B2.

It should be noted that, the above embodiments of the present invention are described by taking the example that the fingerprint identification module 600 is integrated in the display panel (usually, the fingerprint identification module 600 is integrated in the driving layer of the display panel); the fingerprint identification module 600 can also select a plug-in mode to be arranged below the display panel.

When the fingerprint identification module 600 is hung below the display panel and the light-shielding region includes the light-controlling layer 72, the light-controlling layer 72 can replace a geometric lens structure in the hanging fingerprint identification module 600, thereby further reducing the overall thickness and production cost of the display panel.

In addition, a driving layer (i.e., a thin film transistor) of the display panel is generally disposed between the substrate 100 and the pixel defining layer 200, the sub-pixel unit 300, for driving the sub-pixel unit 300 to emit light. Specifically, the thin film transistor includes: the semiconductor device comprises a substrate, a buffer film layer, an active layer, a grid electrode insulating layer, a grid electrode, an interlayer insulating layer, a source electrode and a drain electrode, wherein the buffer film layer is positioned on the substrate, the active layer is positioned on the buffer film layer, the grid electrode insulating layer is positioned on the active layer, the grid electrode is positioned on the grid electrode insulating layer, the interlayer insulating layer is positioned on the grid electrode, and the source electrode and the drain electrode are positioned on the interlayer insulating layer; a passivation layer on the source and drain electrodes; the source and the drain may be located in the same layer and obtained by a one-step patterning process, and therefore, the source and the drain may also be referred to as a source and drain metal layer.

The encapsulation layer 400 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer, wherein the inorganic encapsulation layer and the organic encapsulation layer are sequentially overlapped.

The embodiment of the invention provides a display panel, which comprises a fingerprint identification area and a non-fingerprint identification area; the display panel further includes: a pixel defining layer disposed on one side of the substrate base, the pixel defining layer including a plurality of openings for receiving the sub-pixel units and a spacer; the packaging layer is arranged on one side of the pixel limiting layer and the side, far away from the substrate, of the sub-pixel unit; the color filter layer is arranged on one side of the packaging layer, which is far away from the pixel limiting layer and the sub-pixel unit, and comprises a light shading layer arranged corresponding to the separating body and a color resistor arranged corresponding to the sub-pixel unit; the light shielding layer positioned in the fingerprint identification area at least comprises a first light shielding area, and the first light shielding area at least comprises an infrared quantum dot layer; after visible light that sends at the sub-pixel unit reflected infrared quantum dot layer through the fingerprint, infrared quantum dot layer sent the infrared light and shines to the fingerprint identification module. By designing the light shielding layer positioned in the fingerprint identification area, the light shielding layer does not need to be perforated, so that the problems of improved reflectivity and reduced contrast of the display panel caused by the perforation are solved; simultaneously, the light shield layer includes first light shield area at least, and first light shield area includes infrared quantum dot layer at least, and after the visible light that sends at the sub-pixel unit passed through fingerprint reflection to infrared quantum dot layer, infrared quantum dot layer sent the infrared light and shined to the fingerprint identification module to display panel's fingerprint identification function under the screen has been realized.

The embodiment of the invention also provides a display device, and fig. 8 shows a schematic structural diagram of the display device provided by the embodiment of the invention. As shown in fig. 8, the display device 90 includes a display panel 91 provided in any embodiment of the present invention.

The display device 90 may also include a front camera and a sensor. The front camera and the sensor are correspondingly disposed below the display area of the display panel 91. Optionally, besides the front camera and the sensor, other devices, such as a gyroscope or an earphone, may be disposed below the display area.

The display panel 91 may be any one of display panels such as an Organic Light-Emitting Diode (OLED) display panel, an In-Plane Switching (IPS) display panel, a Twisted Nematic (TN) display panel, a Vertical Alignment (VA) display panel, electronic paper, a Quantum Dot Light Emitting (QLED) display panel, or a micro LED (micro Light Emitting Diode, μ LED) display panel, which is not particularly limited In this respect. The light emitting mode of the display panel 91 may be top emission, bottom emission, or double-sided emission.

The display device 90 provided by the embodiment of the invention can be applied to intelligent wearable equipment (such as an intelligent bracelet and an intelligent watch), and can also be applied to equipment such as an intelligent mobile phone, a tablet personal computer and a display.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, comprising a fingerprint identification region and a non-fingerprint identification region; the display panel further includes:

the packaging layer is arranged on the pixel limiting layer and one side of the sub-pixel unit, which is far away from the substrate;

a color filter layer disposed on a side of the encapsulation layer away from the pixel defining layer and the sub-pixel unit, the color filter layer including a light shielding layer disposed corresponding to the separator and a color resist disposed corresponding to the sub-pixel unit;

visible light that the sub-pixel unit sent is in through fingerprint reflection extremely behind the infrared quantum dot layer, infrared light shines to the fingerprint identification module is sent on infrared quantum dot layer.

2. The display panel according to claim 1, wherein the light shielding layer in the fingerprint identification area further comprises a second light shielding region;

3. The display panel according to claim 2, wherein the second light-shielding region is made of a black light-shielding material;

4. The display panel according to any one of claims 1 to 3, wherein the light shielding layer further comprises: and the light control layer is arranged on one side of the infrared quantum dot layer, which is far away from the packaging layer, or on one side of the infrared quantum dot layer, which is close to the packaging layer.

5. The display panel according to claim 4, wherein the light control layer comprises a plurality of super-structure lenses, and one super-structure lens corresponds to one fingerprint identification sensor in the fingerprint identification module;

preferably, when the shape of the nano antenna is a cuboid, the length, the width and the height of the nano antenna are all in the range of 700 and 1500nm, the placing angle of the nano antenna is in the range of 0-360 degrees, and the distance between two adjacent nano antennas is greater than or equal to 800 nm.

6. The display panel of claim 4, wherein the light control layer comprises a plurality of micro lenses, and one micro lens corresponds to one fingerprint identification sensor in the fingerprint identification module;

preferably, the microlens comprises a first lens unit and a second lens unit which are mutually matched, and one surface of the first lens unit, which is matched with the second lens unit, is a convex surface;

7. The display panel according to any one of claims 1 to 3, wherein the light shielding layer further comprises: the visible light resistance interlayer is arranged on one side, close to the packaging layer, of the infrared quantum dot layer and is used for transmitting infrared light and blocking visible light;

8. The display panel according to claim 1, wherein the color filter layer further comprises:

the first buffer layer is arranged on one side, close to the packaging layer, of the light shielding layer and the color resistor; and/or the presence of a gas in the gas,

the second buffer layer is arranged on one side, far away from the packaging layer, of the light shielding layer and the color resistor;

preferably, the first buffer layer includes scattering particles therein.

9. The display panel of claim 1, wherein the infrared quantum dot layer is made of an infrared quantum dot material;

preferably, the light-emitting wavelength of the infrared quantum dot material is 940 nm;

10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.