CN110797383A - Display panel and display device - Google Patents
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- CN110797383A CN110797383A CN201911110967.4A CN201911110967A CN110797383A CN 110797383 A CN110797383 A CN 110797383A CN 201911110967 A CN201911110967 A CN 201911110967A CN 110797383 A CN110797383 A CN 110797383A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- 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
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Abstract
The invention provides a display panel and a display device, and relates to the technical field of display, wherein the display panel comprises a display screen and a fingerprint identification module, the display screen comprises a substrate base plate, a metal wire layer and a pixel definition layer, the metal wire layer is positioned between the substrate base plate and the pixel definition layer, and the fingerprint identification module is positioned on one side of the substrate base plate, which is deviated from the pixel definition layer; the metal wire layer is provided with a light transmitting area, the pixel defining layer comprises a light emitting area and a non-light emitting area, at least part of the non-light emitting area is provided with a light conversion layer, and the position of the light conversion layer corresponds to the position of the light transmitting area. The display panel provided by the invention improves the light intensity and transmittance of the incident light of the fingerprint, so that the incident light can more accurately and efficiently penetrate through the display screen to reach the fingerprint identification module, and the fingerprint identification unlocking speed is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
When the OLED full-screen display panel is applied to mobile terminals such as mobile phones, the effective display area is large, the provided information display amount is large, and human-computer interaction experience is further improved, so that the full-screen display panel is increasingly applied to display devices. The existing display panel needs to integrate the fingerprint identification module in a display area of the comprehensive display screen in order to realize the fingerprint identification function while realizing the comprehensive display screen.
Under the general condition, the fingerprint identification module is arranged below the display area, and when the display screen is in a working state, the display screen emits light to the light-emitting element outside the screen body, and the light is reflected to the inside of the screen body through the fingerprint and reaches the fingerprint identification module to realize fingerprint identification. However, the substrate of the flexible display screen is usually made of yellow polyimide, so that the transmittance of blue light is low, transmission of reflected light of fingerprints is seriously affected, and the unlocking speed of the fingerprint identification module is slow.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for improving the fingerprint unlocking speed of a fingerprint identification module.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in one aspect, an embodiment of the present invention provides a display panel, including a display screen and a fingerprint identification module, where the display screen includes a substrate, a metal wire layer and a pixel definition layer, the metal wire layer is located between the substrate and the pixel definition layer, and the fingerprint identification module is located on a side of the substrate away from the pixel definition layer; the metal wire layer is provided with a light transmitting area, the pixel definition layer comprises a light emitting area and a non-light emitting area, at least part of the non-light emitting area is provided with a light conversion layer, and the position of the light conversion layer corresponds to the position of the light transmitting area.
Compared with the prior art, the display panel provided by the embodiment of the invention has the following advantages:
according to the display panel provided by the embodiment of the invention, the light conversion layer is arranged in the non-luminous region of the pixel definition layer, and the arrangement of the light conversion layer converts blue light which is difficult to pass through the substrate in fingerprint reflection light into light with other wavelengths which is easy to pass through the substrate, so that the transmittance of fingerprint incident light and the light intensity reaching the fingerprint identification module are improved; the light conversion layer is arranged at the position corresponding to the light-transmitting area on the metal wire layer, so that the accuracy of the path of the fingerprint reflected light in the display screen is further improved, the transmittance of the fingerprint reflected light is further improved, the fingerprint reflected light can pass through the display screen to reach the fingerprint identification module more accurately and efficiently, and the fingerprint identification unlocking speed is improved.
As an improvement of the display panel according to the embodiment of the invention, the non-light-emitting region is provided with a plurality of receiving holes, and the light conversion layer is disposed in the receiving holes.
As an improvement of the display panel according to the embodiment of the invention, the light conversion layer is formed in the accommodating hole by evaporation.
As an improvement of the display panel according to the embodiment of the invention, the accommodating hole is a through hole penetrating through the pixel defining layer.
As an improvement of the display panel according to the embodiment of the invention, the accommodating hole is a blind hole disposed on the pixel defining layer.
As an improvement of the display panel according to the embodiment of the invention, the blind hole is disposed on a side of the pixel defining layer away from the substrate base plate.
As a modification of the display panel according to the embodiment of the invention, the light conversion layer is provided as a red light emitting layer.
As an improvement of the display panel according to the embodiment of the present invention, the display panel further includes a semiconductor layer, an insulating layer, and a planarization layer stacked on the substrate, and a top of the planarization layer is in contact with the pixel defining layer; the metal wire layer comprises a metal electrode and a metal lead, and the metal electrode and the metal lead are positioned between the planarization layer and the insulating layer and are connected with the semiconductor layer through the insulating layer.
As an improvement of the display panel according to the embodiment of the invention, the display screen further includes an anode layer disposed between the planarization layer and the pixel defining layer, and the anode layer is electrically connected to the metal electrode or the metal wire.
On the other hand, the embodiment of the invention also provides a display device, which comprises the display panel.
The display device provided by the embodiment of the invention comprises the display panel, so that the display device also has the same advantages as those of the display panel, and the description is omitted.
In addition to the technical problems, technical features constituting technical aspects, and advantageous effects brought by the technical features of the technical aspects described above, other technical problems, technical features included in technical aspects, and advantageous effects brought by the technical features that can be solved by the display panel and the display device provided by the embodiment of the present invention will be further described in detail in the detailed description.
Drawings
In order to illustrate embodiments of the invention or prior art solutions more clearly, the drawings that are needed in the description of the embodiments of the invention or prior art will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the invention, and that these drawings and the written description are not intended to limit the scope of the disclosed concept in any way, but rather to illustrate it to those skilled in the art by referring to specific embodiments, and that other drawings may be obtained from these drawings without inventive effort to those skilled in the art.
Fig. 1 is a first schematic structural diagram of a display panel according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.
Description of reference numerals:
10-pixel definition layer;
11-a receiving hole;
12-a light conversion layer;
13-an organic light-emitting layer;
21-substrate base plate;
22-a semiconductor layer;
23-an insulating layer;
24-a metal electrode;
25-a light-transmitting region;
26-a planarization layer;
27-an anode layer;
28-a cathode layer;
30-a fingerprint identification module;
31-photosensitive cells.
Detailed Description
Among the present display panel, fingerprint identification module sets up in the display area below usually, and display screen light emitting component sends to the external light of screen reflection of external portion to the screen internal, thereby reachs fingerprint identification module and realize fingerprint identification, but because yellow polyimide flexible substrate base plate is lower to the transmissivity of blue light, seriously influences the seeing through of fingerprint reflection light, leads to the slow problem of fingerprint identification module unblock speed.
In view of the above drawbacks, an embodiment of the present invention provides an improved technical solution, in which a display panel includes a substrate, a metal line layer, and a pixel defining layer, and a light conversion layer is disposed in a non-light emitting region of the pixel defining layer, and the light conversion layer converts blue light, which does not easily pass through the substrate, in fingerprint reflection light into light of other wavelengths, which easily passes through the substrate, so as to improve light intensity and transmittance of fingerprint incident light; the light conversion layer is arranged at the position corresponding to the light-transmitting area on the metal wire layer, so that the accuracy of the path of the fingerprint reflected light in the display screen is further improved, the transmittance of the fingerprint reflected light is further improved, the fingerprint reflected light can pass through the display screen to reach the fingerprint identification module more accurately and efficiently, and the fingerprint identification unlocking speed is improved.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 and fig. 2, a display panel according to a first embodiment of the present invention includes a display screen and a fingerprint identification module, where the display screen includes a substrate, a metal line layer and a pixel definition layer, the metal line layer is located between the substrate and the pixel definition layer, and the fingerprint identification module is located on a side of the substrate away from the pixel definition layer; the metal wire layer is provided with a light transmitting area, the pixel defining layer comprises a light emitting area and a non-light emitting area, at least part of the non-light emitting area is provided with a light conversion layer, and the position of the light conversion layer corresponds to the position of the light transmitting area.
Specifically, in this embodiment, the display panel includes a display screen and a fingerprint identification module 30, as shown in fig. 1, the fingerprint identification module 30 is disposed on a back surface of the display screen, and it should be noted that, in this embodiment, the back surface of the display screen refers to a side of the display screen away from the light exit surface. The fingerprint identification module 30 can be adhered to the display screen through an adhesive, and the adhesive can be specifically set to be an optical adhesive. In this embodiment, the fingerprint identification module 30 is specifically configured as an optical fingerprint identification module 30, the optical fingerprint identification module 30 includes a plurality of photosensitive units 31, and the plurality of photosensitive units 31 are disposed facing the display screen to receive the reflected light of the fingerprint passing through the display screen.
The display panel in this embodiment includes a substrate base 21 and a pixel defining layer 10, as shown in fig. 1, and described by taking the orientation shown in fig. 1 as an example, the pixel defining layer 10 is disposed above the substrate base 21. The pixel defining layer 10 includes a light emitting region, and an organic light emitting layer 13 is disposed in the light emitting region of the pixel defining layer 10. The display panel in this embodiment may be specifically configured as an OLED display panel, and the Organic Light-Emitting layer 13 includes a plurality of Organic Light-Emitting Diode (OLED) devices.
The pixel defining layer 10 in this embodiment further includes a non-light emitting region disposed adjacent to the light emitting region, and a light conversion layer 12 is disposed in at least a partial region of the non-light emitting region. Specifically, the light conversion layer 12 is disposed in various ways, for example, the light conversion layer 12 may be disposed on the surface of the pixel definition layer 10, specifically, the light conversion layer 12 may be disposed on the side of the pixel definition layer 10 away from the substrate 21, and may also be disposed on the side of the pixel definition layer 10 facing the substrate 21. As another example, the light conversion layer 12 may be disposed in the pixel defining layer 10, and specifically, a groove may be disposed on the pixel defining layer 10, and the light conversion layer 12 may be disposed in the groove; a through hole may be provided in the pixel defining layer 10, and the light conversion layer 12 may be provided in the through hole.
In addition to the above embodiments, the light conversion layer 12 may be provided as one layer or may be provided as a plurality of layers; the light conversion layer 12 may be provided as one piece tiled on the pixel defining layer 10, or may be provided as a plurality of pieces arranged in an array on the pixel defining layer 10. The light conversion layer 12 may be a red light layer, an orange light layer, a green light layer, or the like, which easily passes through the yellow substrate 21, and the light conversion layer 12 is used to convert blue light in the fingerprint reflection light into other light with a wavelength, such as red light, orange light, green light, and the like, which easily passes through the yellow substrate 21, and the transmittance and the light intensity of the fingerprint reflection light when passing through the substrate 21 are improved by the conversion of the light.
The display screen in this embodiment further includes the metal wire layer, the metal wire layer is located between substrate 21 and pixel definition layer 10, be formed with light-transmitting area 25 on the metal wire layer in this embodiment, on the basis of above-mentioned embodiment, along the direction of the play plain noodles of perpendicular to, light conversion layer 12 is located the top in above-mentioned light-transmitting area 25, and light conversion layer 12's position corresponds with light-transmitting area 25's position, such setting up has guaranteed that fingerprint reflection light is accurate through light-transmitting area 25 after light conversion layer 12 converts, fingerprint reflection light's transmissivity has been improved, and then fingerprint unblock speed has been improved.
When the display panel provided by the embodiment is used, light emitted by the organic light emitting layer 13 is reflected by a finger fingerprint of a user, blue light in the fingerprint reflection light is converted by the light conversion layer 12 to be light with other wavelengths, the fingerprint reflection light passes through the substrate base plate 21 after passing through the light transmission region 25 below the pixel definition layer 10, and since the converted light easily passes through the substrate base plate 21, the light intensity of the fingerprint reflection light passing through the substrate base plate 21 is increased, and finally the light is incident on the fingerprint identification module 30 and is received and identified by the fingerprint identification module 30.
In summary, in the display panel provided in the first embodiment of the present invention, the light conversion layer 12 is disposed in the non-light emitting region of the pixel defining layer 10, and the light conversion layer 12 converts the blue light, which is difficult to pass through the substrate 21, in the fingerprint reflection light into light with other wavelengths, which is easy to pass through the substrate 21, so as to improve the light intensity and transmittance of the fingerprint incident light; the light conversion layer 12 is arranged at a position corresponding to the light transmission area 25 on the metal wire layer, so that the accuracy of the path of the fingerprint reflected light in the display screen is further improved, the transmittance of the fingerprint reflected light is further improved, the fingerprint reflected light can pass through the display screen more accurately and efficiently to reach the fingerprint identification module 30, and the fingerprint identification unlocking speed is improved.
Further, in one possible implementation, the non-light emitting region is provided with a plurality of receiving holes 11, and the light conversion layer 12 is disposed within the receiving holes 11. In the present embodiment, the receiving hole 11 is disposed in the non-light emitting region, and in addition to the above embodiments, the receiving hole 11 is disposed at a position corresponding to the light transmitting region 25 of the metal wire layer. The receiving hole 11 may be formed by photolithography, and the receiving hole 11 may be a through hole or a blind hole. The cross-sectional shape of the accommodation hole 11 may be rectangular or inverted trapezoidal, taking a plane perpendicular to the pixel defining layer 10 as a cross section, and the shape of the accommodation hole 11 is not particularly limited in this embodiment.
In the present embodiment, the receiving hole 11 is used for receiving the light conversion layer 12, and the position of the light conversion layer 12 can be limited by the receiving hole 11, so that the light conversion layer 12 is prevented from shifting to the OLED device disposed in the light emitting region of the pixel defining layer 10, and the normal light emission of the OLED device is prevented from being affected.
In one possible implementation, the light conversion layer 12 is formed in the accommodation hole 11 by evaporation. Specifically, the light conversion layer 12 is formed in the accommodation hole 11 by evaporation using a Fine Metal Mask (FMM). In this embodiment, the vapor deposition of the light conversion layer 12 may be performed simultaneously with the vapor deposition of the organic light emitting layer 13, or may be performed after the vapor deposition of the organic light emitting layer 13. For example, when the light conversion layer 12 is a red light emitting layer and the organic light emitting layer 13 also includes a red film layer, both layers can be simultaneously deposited by evaporation, thereby saving the manufacturing steps.
In one possible implementation, the accommodation hole 11 is a through hole penetrating the pixel defining layer 10. As shown in fig. 1, in the present embodiment, the accommodation hole 11 penetrates the pixel defining layer 10 from the top surface of the pixel defining layer 10, where the top surface refers to the side of the pixel defining layer 10 away from the substrate base 21. The through hole can be set as a round hole or a square hole, and the shape of the through hole is not specifically limited in the embodiment. The accommodating hole 11 is provided as a through hole in this embodiment, which facilitates fabrication, while also reducing reflection and refraction of reflected light of a fingerprint by the pixel defining layer 10.
In another possible implementation, the accommodation hole 11 is a blind hole provided on the pixel defining layer 10. The blind hole may be disposed on a side of the pixel defining layer 10 facing away from the substrate base 21, or may be disposed on a side of the pixel defining layer 10 facing the substrate base 21. The blind hole can be set as a round hole or a square hole, and the shape of the blind hole is not specifically limited in the embodiment. Further, the accommodation hole 11 may also be provided as an irregular groove.
On the basis of the above embodiment, further, the blind hole is provided on the side of the pixel defining layer 10 facing away from the base substrate 21. As shown in fig. 2, the blind hole is located on the side of the pixel defining layer 10 away from the substrate 21, and the light conversion layer 12 disposed in the blind hole is also located on the side of the pixel defining layer 10 away from the substrate 21. Therefore, when the light emitted from the organic light emitting layer 13 is reflected by the fingerprint, the reflected light from the fingerprint first passes through the light conversion layer 12, and this arrangement prevents the reflected light from being reflected or refracted by the pixel defining layer 10, thereby improving the light conversion efficiency and ensuring that the blue light in the reflected light from the fingerprint is converted into light with other wavelengths as much as possible.
In one possible implementation, the light conversion layer 12 is provided as a red light emitting layer. The light conversion layer 12 in this embodiment is used to convert blue light in the fingerprint reflection light into red light, and specifically, the material of the red light emitting layer is the same as that of the red light film layer in the organic light emitting layer 13. Since red light easily passes through the yellow substrate, the light conversion layer 12 is provided as a red light emitting layer, which improves the transmittance of the fingerprint reflection light through the substrate; in addition, the red light emitting layer is formed in the receiving hole 11 by evaporation, and the evaporation step can be performed simultaneously with the evaporation of the red film layer in the organic light emitting layer 13, and then the excess portion is etched, so that the light conversion layer 12 is provided as the red light emitting layer, thereby saving the manufacturing steps and facilitating the manufacturing.
Further, the display panel also includes a semiconductor layer 22, an insulating layer 23, and a planarization layer 26, which are stacked on the base substrate 21, with the top of the planarization layer 26 in contact with the pixel defining layer 10; the metal wire layer includes a metal electrode 24, and the metal electrode 24 and the metal wire are located between the planarization layer 26 and the insulating layer 23 and connected to the semiconductor layer 22 through the insulating layer 23.
As shown in fig. 1, a semiconductor layer 22 is disposed on a substrate 21, an insulating layer 23 covers the semiconductor layer 22 and the substrate 21, a metal electrode 24 or a metal wire is connected to the semiconductor layer 22 through the insulating layer 23, and a planarization layer 26 covers the metal electrode 24, the metal wire, and the insulating layer 23. In this embodiment, the top surface of the planarization layer 26 is in contact with the pixel defining layer 10, and it should be noted that the top surface of the planarization layer 26 in this embodiment refers to the side of the planarization layer 26 away from the substrate base plate 21. When the receiving hole 11 is provided as a through hole, the light conversion layer 12 located within the through hole is in contact with the top surface of the planarization layer 26. Further, an interlayer insulating layer is provided on the insulating layer 23.
Further, the display screen further includes an anode layer 27 disposed between the planarization layer 26 and the pixel defining layer 10, and the anode layer 27 is electrically connected to the metal electrode 24. As shown in fig. 1, the anode layer 27 is specifically disposed between the light emitting region of the pixel defining layer 10 and the planarization layer 26, a through hole is disposed on the planarization layer 26, and the anode layer 27 is electrically connected to the metal electrode 24 through the through hole. In addition, the display screen further includes a cathode layer 28, and the cathode layer 28 covers the pixel defining layer 10 and is located on a side of the pixel defining layer 10 facing away from the array substrate.
Example two
The display device provided by the second embodiment of the present invention includes the display panel provided by the first embodiment, wherein the structure, function and implementation of the display device can refer to the detailed description in the above embodiments, and are not repeated herein. The display device provided by the embodiment can be any device with a display function, including a display panel, such as a mobile phone, a tablet computer, a smart watch, an electronic book, a navigator, a television, and a digital camera. The display device provided in this embodiment also has the same advantages as implementing a display panel provided in this embodiment, and is not described herein again.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The display panel is characterized by comprising a display screen and a fingerprint identification module, wherein the display screen comprises a substrate base plate, a metal wire layer and a pixel definition layer, the metal wire layer is positioned between the substrate base plate and the pixel definition layer, and the fingerprint identification module is positioned on one side of the substrate base plate, which is far away from the pixel definition layer;
the metal wire layer is provided with a light transmitting area, the pixel definition layer comprises a light emitting area and a non-light emitting area, at least part of the non-light emitting area is provided with a light conversion layer, and the position of the light conversion layer corresponds to the position of the light transmitting area.
2. The display panel according to claim 1, wherein the non-light emitting region is provided with a plurality of receiving holes, and the light conversion layer is disposed in the receiving holes.
3. The display panel according to claim 2, wherein the light conversion layer is formed in the receiving hole by evaporation.
4. The display panel according to claim 2, wherein the receiving hole is a through hole penetrating the pixel defining layer.
5. The display panel according to claim 2, wherein the accommodating hole is a blind hole provided in the pixel defining layer.
6. The display panel according to claim 5, wherein the blind hole is provided on a side of the pixel defining layer facing away from the substrate base plate.
7. The display panel according to claim 1, wherein the light conversion layer is provided as a red light emitting layer.
8. The display panel according to claim 1, wherein the display panel further comprises a semiconductor layer, an insulating layer, and a planarizing layer which are stacked over the substrate base plate, a top of the planarizing layer being in contact with the pixel defining layer;
the metal wire layer comprises a metal electrode and a metal lead, and the metal electrode and the metal lead are positioned between the planarization layer and the insulating layer and are connected with the semiconductor layer through the insulating layer.
9. The display panel according to claim 8, wherein the display panel further comprises an anode layer disposed between the planarization layer and the pixel defining layer, the anode layer being electrically connected to the metal electrode or the metal wire.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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