CN111755494A

CN111755494A - Display panel and display device

Info

Publication number: CN111755494A
Application number: CN202010596522.8A
Authority: CN
Inventors: 李晓玲; 邹敏; 周丽芳
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2020-10-09
Anticipated expiration: 2040-06-28
Also published as: CN111755494B

Abstract

A display panel and a display device are provided, the display panel includes a display area including a photosensitive area; the display panel comprises a substrate, a driving layer and a light-emitting device layer which are arranged in a stacked mode, wherein the driving layer is arranged between the substrate and the light-emitting device layer; the light-emitting device layer comprises a plurality of light-emitting components, each light-emitting component comprises a total reflection electrode layer, a light-emitting layer and a light-transmitting electrode which are arranged in a laminated mode, and the light-transmitting electrode is located on one side, away from the substrate, of the light-emitting layer; the display area comprises a reflection area covered by the total reflection electrodes and a light transmission area positioned between the adjacent total reflection electrodes, and the light sensing area comprises a reflection area and a light transmission area; the display panel further comprises a filter layer, the filter layer is located between the light-transmitting electrode and the active layer, and the filter layer at least corresponds to the light-transmitting area of the photosensitive area. Due to the arrangement of the filter layer, the light reflected by the finger can be partially filtered, and the display uniformity is improved.

Description

Display panel and display device

Technical Field

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

Background

Organic Light-Emitting Diode (OLED) products have the characteristics of high contrast, fast response time, wide viewing angle, vivid color, flexibility and the like, and are more and more favored by people; meanwhile, the OLED full-screen becomes the trend of the times, the screen fingerprint is a method for realizing the full-screen, the screen fingerprint can enable the operation to be more sanitary, the fingerprint module does not need to be contacted, fingerprint traces cannot be left, and the OLED full-screen is suitable for different use environments.

Present screen fingerprint mainly carries out formation of image through the response light and realizes fingerprint identification, and is concrete, through detecting the light that reflects to the fingerprint identification unit via touching the main part (for example finger), determines the ridge and the millet of fingerprint in order to accomplish fingerprint identification. The light sensation fingerprint identification detection speed is high, the use is convenient, and the light sensation fingerprint identification detection device has become a necessary function in the current intelligent equipment. However, the screen fingerprints have the problem of uneven display.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, which are used for solving the problem of uneven display of the display panel caused by screen fingerprints.

In order to solve the technical problems, the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a display panel, including a display area, where the display area includes a photosensitive area;

the display panel comprises a substrate, a driving layer and a light-emitting device layer which are arranged in a stacked mode, wherein the driving layer is arranged between the substrate and the light-emitting device layer;

the light-emitting device layer comprises a plurality of light-emitting components, each light-emitting component comprises a total reflection electrode layer, a light-emitting layer and a light-transmitting electrode which are arranged in a laminated mode, and the light-transmitting electrode is located on one side, away from the substrate, of the light-emitting layer;

the display area comprises a reflection area covered by the total reflection electrodes and a light transmission area positioned between the adjacent total reflection electrodes, and the light sensing area comprises a reflection area and a light transmission area;

the display panel further comprises a filter layer, the filter layer is located between the light-transmitting electrode and the active layer, and the filter layer at least corresponds to the light-transmitting area of the photosensitive area.

Optionally, the filter layer is a filter film.

Optionally, the filter is a green filter.

Optionally, at least one organic insulating layer is included between the light-transmitting electrode and the active layer, and the filter film is located inside or on any one of the organic insulating layers.

Optionally, the projection of the total reflection electrode and the filter layer on the substrate completely covers the photosensitive area.

Optionally, the filter layer is doped with a light absorbing material.

Optionally, the light absorbing material absorbs light at a wavelength of no greater than 480 nm.

Optionally, the organic light-emitting diode further comprises an antireflection film, and the antireflection film is positioned on one side of the active layer close to the substrate.

In a second aspect, an embodiment of the present invention further provides a display apparatus, including the display panel according to any one of the first aspects, and further including a fingerprint sensing device located in the sensing area, where the fingerprint sensing device is located on a side of the substrate away from the driving layer.

According to the display panel and the display device provided by the embodiment of the invention, the filter layer is arranged, so that the light reflected by the fingers can be partially filtered, the influence of the light on the active layer is reduced, and the display uniformity of the display panel is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

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

FIG. 2 is a cross-sectional view of a photosensitive area of the display panel of FIG. 1 along a tangent line YY according to one embodiment;

FIG. 3 is a schematic cross-sectional view of a light-sensing area of a display panel according to another embodiment of the present invention;

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

FIG. 5 is a schematic cross-sectional view of a light-sensing area of a display panel according to still another embodiment of the present invention.

Description of reference numerals:

display area AA: a photosensitive area FA; non-display area NA

A substrate 100; a driving layer 200; a light emitting device layer 300; an active layer 210; a source region 211; a drain region 213; an active layer channel region 212; a buffer layer 220; a gate insulating layer 230; a capacitor dielectric layer 240; an interlayer insulating layer 250; a planarization layer 260; a gate electrode T1; source-drain electrodes T2; a metal lower electrode C1; a metal upper electrode C2; a light emitting element 310; a light-transmitting electrode 311; a light-emitting layer 312; a light-transmitting electrode 313; a pixel defining structure 320; a filter layer 400; an anti-reflection layer 500.

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.

The screen fingerprint technology utilizes a photosensitive device to detect light reflected to the photosensitive device by a finger for fingerprint identification. The screen fingerprint can adapt to the demand of full-face screen, but, light behind the finger reflection part light ray can shine the drive layer, and the Thin Film Transistor (TFT) of drive layer is influenced by the illumination easily and is ageing-accelerated, and especially the active layer of TFT is influenced by the illumination easily and resistance takes place irreversible change. When the resistance of the TFT changes to drive the OLED device, the current at two ends of the OLED device changes, which further affects the display brightness, so that the brightness of the pixels in the FOD (Fingerprint on screen) area changes compared with the brightness of other non-FOD areas, thereby causing uneven display.

Based on this, the present application proposes a display panel structure, comprising: a display area including a photosensitive area; the display panel comprises a substrate, a driving layer and a light-emitting device layer which are arranged in a stacked mode, wherein the driving layer is arranged between the substrate and the light-emitting device layer; the light-emitting device layer comprises a plurality of light-emitting components, each light-emitting component comprises a total reflection electrode layer, a light-emitting layer and a light-transmitting electrode which are arranged in a laminated mode, and the light-transmitting electrode is located on one side, away from the substrate, of the light-emitting layer; the display area comprises a reflection area covered by the total reflection electrodes and a light transmission area positioned between the adjacent total reflection electrodes, and the light sensing area comprises a reflection area and a light transmission area; the display panel further comprises a filter layer, the filter layer is located between the light-transmitting electrode and the active layer, and the filter layer at least corresponds to the light-transmitting area of the photosensitive area.

In the display panel in the embodiment of the invention, the light filtering layer is arranged in the light transmitting area corresponding to the photosensitive area, so that part of light reflected back by fingers can be filtered, the light energy is weakened, the light transmission amount is reduced, and the influence of the light on a TFT (thin film transistor) is reduced.

Fig. 1 to fig. 5 are schematic structural diagrams of a display panel according to an embodiment of the present invention, and details of a technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic top view of a display panel structure according to an embodiment of the invention, and fig. 2 is a schematic cross-sectional view of a light-sensing area of the display panel along a tangent line YY in fig. 1 according to an embodiment of the invention. As shown in fig. 1, the display panel includes a display area AA, and usually, the display panel further includes a non-display area NA. When the display panel has the screen fingerprint function, the display panel comprises a photosensitive area FA, the photosensitive area is located in the display area AA, namely, the photosensitive area FA is a part of the display area AA and has the fingerprint identification function, and correspondingly, the fingerprint photosensitive device of the display device is arranged corresponding to the photosensitive area FA to realize fingerprint identification.

As shown in fig. 2, the display panel includes a substrate 100, a driving layer 200, and a light emitting device layer 300, the driving layer 200 being disposed between the substrate 100 and the light emitting device layer 300. In the embodiments of the present application, the sequence of the process steps is referred to, and it is understood that, in a general structure corresponding to the process sequence, a film layer prepared first is located on the lower side of a film layer prepared later, for example, a display panel needs to form the substrate 100 first, then the driving layer 200 is prepared thereon, and then the light emitting device layer 300 is formed, then the substrate 100 is located on the lower side of the driving layer 200, that is, the driving layer 200 is located on one side of the light emitting device layer 300 close to the substrate, but it is not strictly limited that the film layer prepared later is located on the upper side in the thickness direction than the film layer prepared first, for example, the driving layer 200 may overlap with the light emitting device layer 300 in the thickness direction, which refers to the direction in which the substrate 100 of the display panel points to. The substrate 100 provides support for the display panel, and the substrate 100 may be a flexible substrate 100, for example, a substrate made of PI (polyimide) material, where the PI material has good flexibility and can ensure the flexible display panel to achieve bending performance. The driving layer 200 includes a film layer for driving the OLED to emit light, in the present embodiment, the display panel driving structure includes a Thin Film Transistor (TFT), the driving layer 200 includes an active layer 210, only the active layer 210 is shown in the driving layer 200 in fig. 2, and the rest of the structure is not shown in the present embodiment.

The light emitting device layer 300 includes a plurality of light emitting components 310, the light emitting components 310 are the most basic structure of the OLED display panel, the light emitting components 310 include a light transmitting electrode 311, a light emitting layer 312, and a total reflection electrode 313, which are stacked, and the light transmitting electrode 311 is located on a side of the light emitting layer 312 facing away from the substrate 100. The display panel in this embodiment is a top-emitting display panel, that is, the light direction is the direction in which the driving layer 200 points to the light-emitting device layer 300. The transparent electrode 311 is a cathode, the total reflection electrode 313 is an anode, and the light emitting layer 312 at least includes a light emitting material layer, for example, the light emitting material layer includes a red light emitting material layer, a green light emitting material layer, or a blue light emitting material layer, and the corresponding light emitting component includes a red light emitting component, a green light emitting component, or a blue light emitting component.

In order to realize colorized display, the light emitting device layer 300 includes a pixel defining structure 320, the pixel defining structure 320 is spaced from the light emitting component 310, and the pixel defining structure 320 is used for defining the forming range of the light emitting component 310, and more specifically, for defining the forming position of the light emitting layer 312, so that the light emitting layers 312 with different colors are arranged according to a preset rule, thereby avoiding color mixing in an evaporation process and further realizing colorized display.

The light emitting elements 310 are arranged in an array in the display area AA, and accordingly, the display area AA includes reflective areas covered by the total reflection electrodes 313 and transparent areas located between adjacent total reflection electrodes 313, that is, areas between adjacent reflective areas in the display area are transparent areas. It is understood that the photosensitive area FA is a continuous area in the display area AA, and in this embodiment, the photosensitive area FA is smaller than the display area AA, and in the display device, the photosensitive area FA has a fingerprint identification function, and the corresponding photosensitive area also includes a reflective area and a transparent area, or the photosensitive area FA includes a plurality of light emitting elements 310.

The display panel further includes a filter layer 400, wherein the filter layer 400 is disposed between the light-transmissive electrode 311 and the active layer 210, and the filter layer 400 is disposed at least corresponding to the light-transmissive region of the photosensitive region FA.

The filter layer is arranged in the light-transmitting area of the light-sensing area, and the filter layer can reduce the quantity of light passing through the light-transmitting area, so that the light passing through the area not covered by the total reflection electrode is weakened, the problem of damage of an active layer of a driving layer of the light-sensing area of the screen fingerprint can be solved, the display effect of a display area of the display panel is balanced, and the problem of uneven display of the screen fingerprint display panel is solved.

It is understood that the filter layer 400 may be disposed only in the light-transmitting area of the light-sensing area FA, the filter layer 400 may be disposed in the light-transmitting area of the light-sensing area FA and the display area around the light-sensing area, for example, the area of the filter layer 400 is 1.3 times the area of the light-sensing area FA, or the filter layer 400 may be disposed in the entire display area AA. The uniformity of the display panel can be improved as long as the filter layer 400 is disposed at least in the light-transmitting area of the light-sensing area FA.

In addition, in the embodiment of the invention, the filter layer 400 is disposed between the light-transmitting electrode 311 and the active layer 210, that is, disposed on the upper side of the active layer 210, the lower side of the light-transmitting electrode 311, and disposed on the upper side of the active layer 210, so that light reflected by a finger passes through the filter layer 400 first if passing through the light-transmitting region, and then may reach the active layer 210, because the filter layer 400 has a weakening effect on the light, light energy of the light passing through the filter layer 400 is weakened compared with a display panel without the filter layer 400, even if the light irradiates the active layer 210, damage of the active layer 210 is far less than that of the prior art, so that the active layer 210 is protected, the display panel has more stable driving performance in the whole life cycle, and display uniformity of the display panel is improved. The filter layer 400 is disposed under the transparent electrode 311, which does not affect the normal display of the display panel, for example, if the filter layer 400 is disposed on the light emitting surface, the filter layer 400 may cause the variation of the light intensity and the chromaticity, thereby damaging the normal display.

In this embodiment, the filter layer 400 is located between the pixel defining structure 320 and the driving layer 200, and is in contact with a surface of the pixel defining structure 320 on a side close to the substrate 100. Through the arrangement of the filter layer 400, light reflected by a finger is weakened, the risk of damaging an active layer is reduced, and the display uniformity is improved under the condition that normal display is not influenced and the requirement of brightness of a fingerprint sensing device is met.

Fig. 3 is a schematic cross-sectional view of a photosensitive area of a display panel according to another embodiment of the invention. As shown in fig. 3, the display panel includes a substrate 100. The driving layer 200 includes a buffer layer 220 on the substrate 100, and the buffer layer 220 is used to block impurities of the substrate 100 from entering the active layer 210 and protect the thin film transistor. The thin film transistor structure is part of a driving circuit for driving the organic light emitting diode to emit light. The driving layer 200 further includes a gate insulating layer 230, a capacitor dielectric layer 240, an interlayer insulating layer 250, a gate electrode T1, a source/drain electrode T2, a metal lower electrode C1 and a metal upper electrode C2 included in the capacitor structure, the active layer 210 includes a source region 211, a drain region 213 and an active layer channel region 212, the active layer 210 in the display panel of the present embodiment is made of P-Si, and the source/drain electrode is connected to the active layer 210 through a via hole located between the gate insulating layer 230, the capacitor dielectric layer 240 and the interlayer insulating layer 250.

The light-emitting device layer 300 comprises a pixel defining structure 320 and a light-emitting component 310, wherein the light-emitting component 310 comprises a light-transmitting electrode 311, a light-emitting layer 312 and a total reflection electrode 313 which are arranged in a stacked mode, and the light-transmitting electrode 311 is positioned on one side, away from the substrate 100, of the light-emitting layer 312; the display panel further includes a filter layer 400, wherein the filter layer 400 is disposed between the light-transmissive electrode 311 and the active layer 210, and the filter layer 400 is disposed at least corresponding to the light-transmissive region of the photosensitive region FA.

The filter layer 400 may remove all or only a portion of the wavelength bands. At present, the OLED color display panel mainly uses red, green and blue sub-pixels to emit light to form color display. For the light with different colors and different wavelengths, the display panel of the present embodiment includes a red light emitting device, a green light emitting device, and a blue light emitting device, where the red light wavelength is greater than the green light wavelength, and the green light wavelength is greater than the blue light wavelength, and the wavelength and the light energy are inversely proportional, the shorter the wavelength is, the higher the photon energy is, the larger the influence on the active layer 210 is, and the shortest the blue light wavelength in the visible light is. Therefore, the filter layer 400 may be selected to have at least a blue light filtering function.

At present display panel adopts green light and blue light to carry out the sensitization device fingerprint response mostly, consequently, can select green glow filter coating, green glow filter coating only allows the green glow to pass through, the higher blue light of light energy is filtered, the ruddiness that is not used for fingerprint identification is filtered equally, consequently, filter blue light and ruddiness through green glow filter coating, reduce the influence of light to TFT resistance, with reduce sensitization district OLED device both ends electric current and other regional current differences, thereby improve FOD and show uneven phenomenon. In addition, in the OLED display panel, blue light accounts for about 10% and green light accounts for about 60%, and by providing a green light layer, not only light with high light energy is filtered, but also sufficient light can be retained for the photosensitive device to recognize a fingerprint. The accuracy of fingerprint identification is guaranteed.

The filter layer 400 is a filter film that only allows a part of wavelength bands of light to pass through, so that light attenuation can be performed. Or a film layer with low light transmittance, for example, the light transmittance is lower than 70%, so that the light flux is reduced, the active layer is protected, and the light requirement of the photosensitive device is met.

The driving layer 200 and the light emitting device layer 300 each include a plurality of film layers stacked, and a plurality of inorganic insulating layers and a plurality of organic insulating layers are typically included between the light-transmitting electrode 311 and the active layer 210, and the filter film may be located inside or on any one of the organic insulating layers or the inorganic insulating layers. The organic insulating layer or the inorganic insulating layer referred to herein is a film layer that is not related to the light emitting function of the display panel, and is a film layer that exhibits auxiliary functions such as metal-to-metal insulation, planarization, and pixel definition. The filter is usually an organic material, and the filter layer 400 is disposed on the surface or inside the organic insulating layer, so that the organic material can increase the bonding force between adjacent layers compared to the bonding between the organic layer and the inorganic layer. When the display panel has the filter layer 400, the thickness of the existing film layer can be reduced properly, for example, the filter layer 400 is located on the surface or inside the planarization layer 260, and at this time, the thickness of the planarization layer 260 can be reduced properly, so that the filter layer 400 has the planarization effect. Of course, the filter layer may also be disposed in the inorganic insulating layer, for example, the filter layer 400 is located on the surface or inside of the gate insulating layer 230, as long as the filter layer 400 is located between the light-transmitting electrode 311 and the active layer 210, light can be filtered, light energy can be reduced, and fingerprint identification can be realized while protecting the display panel.

The organic insulating layer includes a planarization layer 260 and a pixel defining structure 320, wherein the planarization layer 260 is disposed on the surface of the driving layer 200 and is used for forming a flat structure on the surface of the driving layer 200 after forming each driving performance film lamination layer, so as to facilitate the preparation of the subsequent light emitting device layer 300.

The projections of the total reflection electrode 313 and the filter layer 400 on the substrate 100 may completely cover the photosensitive area FA. That is, the filter layer 400 is disposed at least in the region of the photosensitive area FA not covered by the total reflection electrode 313, and the light reflected by the finger is partially filtered by the filter layer 400, so that the light energy is reduced, and the influence of the screen fingerprint identification on the display panel is reduced. In this embodiment, the filter layer 400 is located on the surface of the pixel defining structure 320 and completely covers the pixel defining structure 320, so that the light can be partially filtered out, and meanwhile, since the pixel defining structure 320 is completely covered, a flat surface is formed on the surface of the pixel defining structure, thereby facilitating the preparation of a subsequent film layer. It is to be understood that the thickness and properties of the filter layer 400 are not limited in this application, and may be selected according to actual situations.

Fig. 4 is a schematic cross-sectional view of a photosensitive area of a display panel according to another embodiment of the present disclosure, in this embodiment, projections of the total reflection electrodes 313 and the filter layer 400 on the substrate 100 do not overlap, that is, the filter layer 400 is disposed only in an area not covered by the total reflection electrodes 313, such an arrangement not only can achieve overall protection of the display panel, but also the filter layer 400 is disposed only in an area not covered by the light transmission electrodes 313, so as to reduce an arrangement range of the filter layer 400 and save cost. In this embodiment, the filter layer 400 is located on the surface of the planarization layer 260, so that the thickness of the pixel defining structure 320 can be reduced within a range of forming the filter layer according to the thickness of the filter layer 400, thereby avoiding an increase in the overall film of the display panel.

In general, the total reflection electrode 313 includes a portion covered by the light emitting layer 312 and a portion extending to a partial region of the adjacent pixel defining structure 320, both of which together constitute the total reflection electrode 313, and the total reflection electrode 313 covered by the light emitting region 312 and the pixel defining structure 320 are two portions of the same electrode, which are different only in position or shape.

In addition to being a filter film, the filter layer may be doped with a light absorbing material. The light absorption material can weaken light, and meanwhile, as the light absorption material only needs to be doped, the film layer in the existing display panel can be reused as a light shielding layer, the inorganic insulating layer and the organic insulating layer can be prepared after the light absorption material is doped, and the light absorption material is doped in the existing film layer, so that the light can be weakened under the condition that the structure and the thickness of the existing film layer are not changed. Of course, part of the structure of the existing film layer may be changed, for example, the thickness of the film layer doped with the light absorbing material is smaller than that of the existing structure film layer, and the remaining thickness range is not doped, for example, the thickness of the film layer doped with the light absorbing material is only 20% -60% of that of the existing structure film layer.

In one embodiment, the light absorbing material is an organic material, and the light absorbing material is doped in the inorganic insulating layer, so that not only can light be weakened, but also the bending performance of the inorganic film layer can be improved.

The light absorbing material may absorb light in a full wavelength band, for example, the light absorbing material may have a light transmittance of less than 50%, or may absorb light in only a partial wavelength band. Preferably, the light absorbing material absorbs light with a wavelength not greater than 480nm, i.e., absorbs light with a smaller wavelength, significantly reduces light in a wavelength band where light energy is high, and improves display uniformity.

Fig. 5 is a schematic cross-sectional view of a photosensitive region of a display panel according to another embodiment of the present invention, in which the display panel further includes an anti-reflection film 500, and the anti-reflection film 500 is located on a side of the active layer 210 close to the substrate 100. The antireflection film 500 may be located between the active layer 210 and the substrate 100 or on the surface of the substrate 100 away from the active layer 210. After the light passes through the filter layer 400, part of the light is filtered, and sufficient light is needed for fingerprint identification, so that in order to simultaneously meet the requirements of display uniformity and accuracy of fingerprint identification, the antireflection film 500 is arranged on the side, close to the substrate 100, of the active layer 210, and the light quantity reaching the TFT device is not increased. Therefore, under the condition of improving the uniformity of the display panel, the light entering the sensing area FA is enhanced, and the condition that the light brightness is lower than the fingerprint identification brightness threshold value is avoided.

The antireflection film 500 may be disposed according to specific conditions of the filter layer 400, for example, if the filter layer 400 is a green light filter film, the antireflection film may be a green light antireflection film, if the filter layer 400 is a green light filter film, only green light passes through the filter film, and since the green light filter film reduces the total amount of light passing through, by disposing the green light antireflection film, the luminance of light entering the light sensing device is enhanced, and the sensitivity and accuracy of fingerprint identification are improved. Specifically, the antireflection film may be silicon dioxide, zirconium oxide, titanium dioxide, or the like.

Buffer layer 220 is included between substrate 100 and active layer 210, buffer layer 220 may be one or more buffer layers, and antireflection film 500 may be disposed on the surface or inside buffer layer 220.

In another aspect, the present invention further provides a display apparatus, which includes the display panel as described above, and further includes a fingerprint sensing device located in the photosensitive region, where the fingerprint sensing device is located on a side of the substrate facing away from the driving layer. Because the display panel comprises the filter layer, the display device can also play a role in protecting the active layer, and further improve the display uniformity.

In one embodiment, the display device further includes a protective layer disposed on the back side of the display panel, and the protective layer on the photosensitive area FA portion can be removed, thereby further improving the light throughput.

In another embodiment of the display device, the display device further includes an antireflection film, the antireflection film is disposed on the surface of the substrate away from the driving layer, the fingerprint sensor is disposed on a side of the antireflection film away from the substrate, and the antireflection film is disposed close to the fingerprint sensor, so that light entering the fingerprint sensor is enhanced, and accuracy and sensitivity of fingerprint detection are improved.

In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, comprising a display area, the display area comprising a photosensitive area;

2. The display panel according to claim 1, wherein the filter layer is a filter film.

3. The display panel of claim 2, wherein the filter is a green filter.

4. The display panel according to claim 2, wherein at least one organic insulating layer is included between the light-transmissive electrode and the active layer, and the filter film is located inside or on any one of the organic insulating layers.

5. The display panel according to claim 1, wherein the projection of the total reflection electrode and the filter layer on the substrate completely covers the photosensitive region.

6. The display panel according to claim 5, wherein the total reflection electrode does not overlap with a projection of the filter layer on the substrate.

7. The display panel of claim 1, wherein the filter layer is doped with a light absorbing material.

8. The display panel of claim 7, wherein the light absorbing material absorbs light at a wavelength of not greater than 480 nm.

9. The display panel according to claim 1, further comprising an antireflection film on a side of the active layer adjacent to the substrate.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 9; still including being located the fingerprint sensitization device of sensitization district, fingerprint sensitization device is located the basement deviates from one side of actuating layer.