Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a substrate, a display layer located on one side of the substrate, a first optical layer and a second optical layer, and the display layer comprises a display unit and a photosensitive unit; the first optical layer is located on the side, away from the substrate, of the display layer, the orthographic projection of the first optical layer on the substrate covers the orthographic projection of the photosensitive unit on the substrate, and the second optical layer is located between the first optical layer and the display layer. The orthographic projection of the second optical layer on the substrate surrounds the orthographic projection of the photosensitive unit on the substrate. The identification efficiency of the photosensitive unit such as a fingerprint identification unit can be improved, and the problem of low fingerprint identification efficiency is solved.

Description

Technical Field

[0001] The invention relates to a display panel and a display device, belonging to the technical field of organic light emitting display. Background Art

[0002] Organic Light-Emitting Diode (OLED) has excellent properties such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility. Therefore, it is widely used in display devices such as terminal equipment and wearable devices.

[0003] With the gradual development of display technology, in-screen fingerprint recognition technology is gradually being applied to various display panels. However, organic electroluminescent diodes have the characteristics of self-luminescence. During the fingerprint recognition process, part of the light emitted by the organic electroluminescent diodes is transmitted to the fingerprint recognition unit, resulting in low fingerprint recognition efficiency. Summary of the invention

[0004] The present invention provides a display panel and a display device to solve the problem of low efficiency of a photosensitive unit.

[0005] The present invention provides a display panel, comprising: a substrate; a display layer located on one side of the substrate, the display layer comprising a display unit and a photosensitive unit; a first optical layer, the first optical layer being located on a side of the display layer away from the substrate, the orthographic projection of the first optical layer on the substrate covering the orthographic projection of the photosensitive unit on the substrate, the first optical layer being used for performing a primary collimation on the light incident to the photosensitive unit; a second optical layer, the second optical layer being located between the first optical layer and the display layer, the orthographic projection of the second optical layer on the substrate surrounding the orthographic projection of the photosensitive unit on the substrate, the second optical layer being used for performing a secondary collimation on the light incident to the photosensitive unit.

[0006] As for the display panel as described above, optionally, the first optical layer includes a first optical sublayer and a second optical sublayer stacked sequentially in a direction perpendicular to the substrate, the second optical sublayer is located between the first optical sublayer and the second optical layer, and the refractive index of the second optical sublayer is smaller than the refractive index of the first optical sublayer.

[0007] For the display panel as described above, optionally, a difference between a refractive index of the first optical sublayer and a refractive index of the second optical sublayer is greater than 0.3.

[0008] For the display panel as described above, optionally, the refractive index of the first optical sublayer is greater than 1.5, and the refractive index of the second optical sublayer is less than 1.4.

[0009] As for the display panel as described above, optionally, the orthographic projection of the first optical sublayer on the display panel covers the orthographic projection of the photosensitive unit on the substrate, and the orthographic projection of the first optical sublayer on the substrate is located within the orthographic projection of the second optical sublayer on the substrate.

[0010] The display panel as described above, optionally, the orthographic projection of the first optical sublayer on the substrate covers and exceeds the orthographic projection of the photosensitive unit on the substrate;

[0011] Preferably, the orthographic projection of the first optical sublayer on the substrate exceeds the orthographic projection of the photosensitive unit on the substrate by at least 2 um.

[0012] As described above, optionally, the display panel further includes a filter film layer, wherein the filter film layer is arranged on a side of the second optical layer away from the substrate, the filter film layer has a light-transmitting hole, the orthographic projection of the light-transmitting hole on the substrate covers the orthographic projection of the photosensitive unit on the substrate, at least a portion of the second optical sublayer is filled in the light-transmitting hole, and the orthographic projection of the first optical sublayer on the substrate covers the orthographic projection of the light-transmitting hole on the substrate.

[0013] In the display panel as described above, optionally, the first optical sublayer comprises a plurality of lenses, and a side of the lenses facing away from the substrate is a convex surface;

[0014] Preferably, a size of a surface of the lens facing away from the substrate is smaller than a size of a surface of the lens close to the substrate.

[0015] As for the display panel as described above, optionally, both the first optical sublayer and the second optical sublayer include organic materials.

[0016] In the display panel as described above, optionally, the second optical layer includes a light-transmitting portion and a collimating portion, the collimating portion surrounds the light-transmitting portion, and the orthographic projection of the light-transmitting portion on the substrate covers the orthographic projection of the photosensitive unit on the substrate.

[0017] For the display panel as described above, optionally, the material of the collimating portion includes molybdenum or black glue.

[0018] The display panel as described above, optionally, the display panel further includes:

[0019] an encapsulation layer, the encapsulation layer being arranged on a side of the display layer away from the substrate;

[0020] The touch layer is located on a side of the packaging layer away from the display layer, and the second optical layer is embedded in the touch layer and in contact with the packaging layer; or the second optical layer is disposed between the packaging layer and the touch layer.

[0021] As described above, the display panel, optionally, the display layer also includes a pixel defining layer, the pixel defining layer is arranged on one side of the substrate, the pixel defining layer has a pixel opening and an identification opening, a part of the display unit is located in the pixel opening, the photosensitive unit is located in the identification opening, the opening area of ​​the identification opening is smaller than the opening area of ​​the pixel opening, and / or the width of the pixel defining layer surrounding the photosensitive unit is smaller than the width of the pixel defining layer surrounding the display unit.

[0022] The present invention further provides a display device, comprising any one of the above-mentioned display panels.

[0023] In the display panel and display device provided by the present invention, by setting the first optical layer and the second optical layer, the first optical layer performs preliminary convergence and collimation on the light incident to the photosensitive unit such as the fingerprint recognition unit to ensure that more light is incident to the photosensitive unit, improve the light intensity received by the photosensitive unit, and facilitate the rapid recognition of the photosensitive unit. With the second optical layer, the influence of stray light such as ambient light can be removed, and at the same time, the light incident to the photosensitive unit can be secondary converged and collimated to make the light irradiated to the photosensitive unit more concentrated, which is conducive to improving the recognition efficiency of the photosensitive unit. Since the first optical layer and the second optical layer collimate the light incident to the photosensitive unit twice, the area of ​​the light spot incident to the photosensitive unit is reduced, and the area of ​​the photosensitive unit can be reduced while improving the recognition efficiency of the photosensitive unit, which is conducive to the use of the space of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. In addition, these drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by reference to specific embodiments.

[0025] Figure 1 A schematic structural diagram of an implementation manner of a display panel in an embodiment of the present invention;

[0026] Figure 2 Shows Figure 1 A schematic diagram of the transmission of light incident on a photosensitive unit in a display panel;

[0027] Figure 3 is a schematic structural diagram of another implementation manner of a display panel in an embodiment of the present invention;

[0028] Figure 4 is a structural schematic diagram of another implementation manner of a display panel in an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of another implementation manner of a display panel in an embodiment of the present invention;

[0030] Figure 6 is a schematic structural diagram of another implementation manner of a display panel in an embodiment of the present invention;

[0031] Figure 7 is a schematic structural diagram of another implementation manner of a display panel in an embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of a display device in an optional embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 10-substrate;

[0035] 20-display layer;

[0036] 21-display unit;

[0037] 22-photosensitive unit;

[0038] 23-pixel limiting layer;

[0039] 231-pixel opening;

[0040] 232-Identify the opening;

[0041] 30-first optical layer;

[0042] 31-first optical sublayer;

[0043] 311-lens;

[0044] 32- second optical sublayer;

[0045] 40- second optical layer;

[0046] 41-light transmission area;

[0047] 42-Collimation part;

[0048] 50-light filter film layer;

[0049] 51-light transmission hole;

[0050] 52-black matrix sublayer;

[0051] 53- filter film sublayer;

[0052] 60-encapsulation layer;

[0053] 70-touch layer;

[0054] 80-cover plate;

[0055] 90-display panel;

[0056] 91- identification area;

[0057] 100-display device. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0059] Figure 1 FIG. 9 is a schematic diagram of a structure of an implementation of a display panel 90 in an embodiment of the present invention. Figure 1 As shown, the present embodiment provides a display panel 90, including a substrate 10, a display layer 20 arranged on one side of the substrate 10, and a first optical layer 30 and a second optical layer 40, the display layer 20 includes a display unit 21 and a photosensitive unit 22; the photosensitive unit 22 includes but is not limited to a fingerprint recognition unit; the first optical layer 30 is located on a side of the display layer 20 away from the substrate 10, the orthographic projection of the first optical layer 30 on the substrate 10 covers the orthographic projection of the photosensitive unit 22 on the substrate 10, the first optical layer 30 is used to collimate the light incident to the photosensitive unit 22 once, the second optical layer 40 is located between the first optical layer 30 and the display layer 20, the orthographic projection of the second optical layer 40 on the substrate 10 surrounds the orthographic projection of the photosensitive unit 22 on the substrate 10, and the second optical layer 40 is used to collimate the light incident to the photosensitive unit 22 twice.

[0060] In the art, a commonly used method is to make a single lens structure in the optical path to increase light focusing, remove stray light such as ambient light, and thus improve the recognition efficiency of the photosensitive unit. However, since the single lens structure only has a collimation effect once, the recognition efficiency of the photosensitive unit is still poor, and the display panel 90 has the problem of low recognition efficiency of the photosensitive unit.

[0061] In view of the above problems, the present embodiment improves the structure of the display panel 90, which includes a first optical layer 30 and a second optical layer 40, wherein the second optical layer 40 is located between the photosensitive unit 22 and the first optical layer 30, the first optical layer 30 collimates the light incident to the photosensitive unit 22 once to focus the light, and the second optical layer 40 collimates the light after the collimation once twice to remove stray light such as ambient light, reduce noise, and improve the recognition efficiency of the photosensitive unit 22. The display panel 90 provided in the present embodiment can collimate the light incident to the photosensitive unit 22 by providing the first optical layer 30 and the second optical layer 40, avoid large-angle deflection of the light incident to the photosensitive unit 22, cause light loss, and improve the intensity of the light incident to the photosensitive unit 22, which is conducive to improving the recognition efficiency of the photosensitive unit 22. In addition, the arrangement of the first optical layer 30 and the second optical layer 40 can also remove stray light such as ambient light, reduce noise, and improve the accuracy of light incident on the photosensitive unit 22, which is beneficial to improving the recognition efficiency of the photosensitive unit 22. Figure 2 .

[0062] Typically, the display area of ​​the display panel 90 has an identification area 91 for identifying fingerprints. When the user's fingerprint covers the identification area 91, the light emitted by the display unit 21 will be directed toward the identification area 91, and the fingerprint will reflect the light to the photosensitive unit 22. This part of the reflected light is the light reflected by the fingerprint, that is, the light incident on the photosensitive unit 22.

[0063] The display panel 90 provided in this embodiment is provided with a first optical layer 30 and a second optical layer 40. The first optical layer 30 performs preliminary focusing and collimation on the light reflected from the fingerprint to the photosensitive unit 22, so as to ensure that more light reflected from the fingerprint is incident on the photosensitive unit 22, thereby increasing the light intensity received by the photosensitive unit 22, and facilitating rapid recognition of the photosensitive unit 22. The second optical layer 44 can be used to remove the influence of stray light such as ambient light, and at the same time, the light reflected from the fingerprint to the photosensitive unit 22 can be secondary focused and collimated, so that the light irradiated to the photosensitive unit 22 is more concentrated, which is conducive to improving the recognition efficiency of the photosensitive unit 22. Since the first optical layer 30 and the second optical layer 40 perform two collimations on the light reflected from the fingerprint to the photosensitive unit 22, the spot area of ​​the light reflected from the fingerprint to the photosensitive unit 22 falling on the photosensitive unit 22 is reduced, and the recognition efficiency of the photosensitive unit 22 can be improved while the area of ​​the photosensitive unit 22 can be reduced, which is conducive to the utilization of the space of the display panel 90. In some embodiments, each pixel unit may be arranged corresponding to two photosensitive units 22 , and each pixel unit includes at least two sub-pixels of different colors.

[0064] On the basis of the above-mentioned embodiment, the first optical layer 30 includes a first optical sublayer 31 and a second optical sublayer 32 sequentially stacked in a direction perpendicular to the substrate, the second optical sublayer 32 is located between the first optical sublayer 31 and the second optical layer 40, and the refractive index of the second optical sublayer 32 is less than the refractive index of the first optical sublayer 31. The different refractive indexes of the first optical sublayer 31 and the second optical sublayer 32 are conducive to the light being incident into the touch layer 70 through the first optical layer 30, and are conducive to the smooth transition of the light, avoiding the light from being deflected at a large angle and causing the loss of light energy, so that the first optical layer 30 collimates the light reflected from the fingerprint to the photosensitive unit 22, and ensures the intensity of the light reflected from the fingerprint to the photosensitive unit 22 transmitted to the photosensitive unit 22, which is conducive to improving the recognition efficiency of the photosensitive unit 22.

[0065] Specifically, the second optical sublayer 32 is made of a low refractive index material, and the first optical sublayer 31 is made of a high refractive index material. For example, the first optical sublayer 31 is made of a material with a refractive index greater than 1.5, and the second optical sublayer 32 is made of a material with a refractive index less than 1.4.

[0066] In order to ensure smooth transition of light, the difference in refractive index between the first optical sublayer 31 and the second optical sublayer 32 may be controlled. For example, the difference in refractive index between the first optical sublayer 31 and the second optical sublayer 32 may be greater than 0.3.

[0067] As a preferred embodiment, based on the above embodiment, the first optical sublayer 31 and the second optical sublayer 32 both include organic materials. For example, the first optical sublayer 31 and the second optical sublayer 32 are both organic materials, which is conducive to the production of the first optical layer 30 under low temperature process, preventing high temperature from damaging the performance of the display unit 21, and effectively reducing the difficulty of producing the display panel 90.

[0068] Figure 3 FIG. 1 is a schematic diagram of another embodiment of the display panel 90 according to an embodiment of the present invention. Figure 3 As shown, the first optical sublayer 31 includes a plurality of lenses 311, and the surface of the lens 311 facing away from the substrate 10 is a convex surface, which is beneficial for the light reflected from the fingerprint to the photosensitive unit 22 to be deflected in the direction of the optical axis when passing through the convex surface, so that the first optical sublayer 31 converges the light reflected from the fingerprint to the photosensitive unit 22, thereby achieving the purpose of one-time collimation.

[0069] In some embodiments, the size of the surface of the lens 311 facing away from the substrate 10 is smaller than the size of the surface of the lens 311 close to the substrate 10, so that the cross-section of the lens 311 in the direction perpendicular to the substrate 10 is trapezoidal.

[0070] As a preferred embodiment, on the basis of the above embodiment, the orthographic projection of the first optical sublayer 31 on the substrate 10 covers the orthographic projection of the photosensitive unit 22 on the substrate 10. Such a configuration is conducive to converging and collimating more light to the photosensitive unit 22, reducing the waste of light incident on the photosensitive unit 22, and is conducive to improving the recognition efficiency of the photosensitive unit 22. In some embodiments, the orthographic projection of the first optical sublayer 31 on the substrate 10 covers and exceeds the orthographic projection of the photosensitive unit 22 on the substrate 10.

[0071] On the basis of the above-mentioned embodiment, the display panel 90 further includes a filter film layer 50, which is disposed on a side of the second optical layer 40 away from the substrate 10, and has a light-transmitting hole 51. The orthographic projection of the light-transmitting hole 51 on the substrate 10 covers the orthographic projection of the photosensitive unit 22 on the substrate 10. In some embodiments, the orthographic projection of the light-transmitting hole 51 on the substrate 10 covers and exceeds the orthographic projection of the photosensitive unit 22 on the substrate 10.

[0072] By providing the light-transmitting hole 51 at the filter film layer 50, the light absorption of the filter film layer 50 is reduced, which is conducive to more light being incident on the photosensitive unit 22, and is conducive to improving the recognition efficiency of the photosensitive unit 22. The orthographic projection of the light-transmitting hole 51 on the substrate 10 covers and exceeds the orthographic projection of the photosensitive unit 22 on the substrate, so as to allow more light to be incident on the photosensitive unit 22, increase the light intensity falling on the photosensitive unit 22, and facilitate the rapid photosensitivity of the photosensitive unit 22.

[0073] In addition, at least a portion of the second optical sublayer 32 is filled in the light-transmitting hole 51, which can make the first optical sublayer 31 closer to the surface of the finger contacting the display panel 90, which is beneficial to focusing the light on the first optical sublayer 31. In addition, another portion of the second optical sublayer 32 is arranged on the side of the filter film layer 50 away from the substrate 10 to facilitate the connection between the filter film layer 50 and the cover plate.

[0074] Based on the above method, the filter film layer 50 includes a black matrix sublayer 52 and a filter film sublayer 53, the black matrix sublayer 52 includes a plurality of spaced black block structures, the filter film sublayer 53 includes a plurality of colored block structures of different colors, the colored block structure is arranged between two adjacent black block structures, wherein the light-transmitting hole 51 is located between two of the black block structures.

[0075] In an optional embodiment, the distance from the outer edge of the orthographic projection of the photosensitive unit 22 on the substrate 10 to the outer edge of the orthographic projection of the light-transmitting hole 51 on the substrate 10 is greater than or equal to 2um, so as to collimate as much light as possible while blocking stray light. For example, if the orthographic projection of the photosensitive unit 22 on the substrate 10 is circular, and the light-transmitting hole 51 is also circular, then the radius of the light-transmitting hole 51 is 2um larger than the orthographic projection of the photosensitive unit 22 on the substrate 10.

[0076] On the basis of the above-mentioned embodiment, the orthographic projection of the first optical sublayer 31 on the substrate 10 covers the orthographic projection of the light-transmitting hole 51 on the substrate 10. Such a configuration is beneficial for the first optical sublayer 31 to converge more light with fingerprint identification information. At the same time, since the first optical sublayer 31 has a convergence effect on light, when the light is transmitted to the light-transmitting hole 51, the light has been preliminarily converged and collimated, and no light loss will be caused, which is beneficial for more light to be incident on the photosensitive unit 22.

[0077] On the basis of the above embodiment, the second optical layer 40 includes a light-transmitting portion 41 and a collimating portion 42, wherein the collimating portion 42 surrounds the light-transmitting portion 41, and the orthographic projection of the light-transmitting portion 41 on the substrate 10 covers the orthographic projection of the photosensitive unit 22 on the substrate 10. The light-transmitting portion 41 is provided to allow light to be incident on the photosensitive unit 22, while the collimating portion 42 can absorb some light at a large angle, which is beneficial for absorbing external ambient light, thereby achieving the purpose of secondary collimation, reducing the interference of stray light, and thus reducing noise.

[0078] It should be noted that since the area for identifying fingerprints on the display panel 90 is located directly above the photosensitive unit 22, during fingerprint identification, some ambient light will be obliquely incident to form stray light, and the collimating portion 42 can absorb the stray light, which can not only reduce the impact of the stray light on the photosensitive unit 22, but also avoid the impact of the stray light on the display unit 21.

[0079] As a preferred embodiment, based on the above embodiment, the material of the collimating portion 42 includes molybdenum, and the use of molybdenum can avoid the generation of gas and reduce the damage to organic materials. Of course, the collimating portion 42 can also be other light-absorbing materials, such as black glue, and there is no specific limitation here, as long as the collimating portion can collimate the light directed to the photosensitive unit 22.

[0080] On the basis of the above embodiment, the display panel 90 further includes an encapsulation layer 60 and a touch layer 70, wherein the encapsulation layer 60 is disposed on a side of the display layer 20 away from the substrate 10, the touch layer 70 is located on a side of the encapsulation layer 60 away from the display layer 20, and the second optical layer 40 is embedded in the touch layer 70 and in contact with the encapsulation layer 60, or the second optical layer 40 is disposed between the encapsulation layer 60 and the touch layer 70. The encapsulation layer 60 can protect the display unit 21, and the second optical layer 40 is disposed on a side of the encapsulation layer 60 away from the substrate 10 to avoid affecting the display unit 21. In addition, since the touch layer 70 has a relatively thick thickness, the second optical layer 40 is embedded in the touch layer 70, which does not increase the thickness of the touch layer 70, and is conducive to the thinness of the display panel 90.

[0081] On the basis of the above embodiment, the display layer 20 further includes a pixel defining layer 23, which is disposed on one side of the substrate 10. The pixel defining layer 23 has a pixel opening 231 and an identification opening 232. A portion of the display unit 21 is located in the pixel opening 231, and the photosensitive unit 22 is located in the identification opening 232. The opening area of ​​the identification opening 232 is smaller than the opening area of ​​the pixel opening 231. Since the pixel defining layer 23 is a non-light-transmitting structure, but light is transmitted at the pixel opening 231 and the identification opening 232, if the photosensitive unit 22 is fully exposed in the identification opening 232, then the area of ​​the photosensitive unit 22 is its effective identification area. If only a portion of the photosensitive unit 22 is exposed in the identification opening 232, then the area exposed in the identification opening 232 is the effective identification area of ​​the photosensitive unit 22. Regardless of which of the above methods is selected, the effective identification area of ​​the photosensitive unit 22 is smaller than the effective display area of ​​the display unit 21. When the size of the pixel opening 231 of the display panel 90 remains unchanged, the size of the photosensitive unit 22 is reduced.

[0082] In other embodiments, Figure 7 As shown, the width d1 of the pixel defining layer 23 surrounding the photosensitive unit 22 may also be smaller than the width d2 of the pixel defining layer 23 surrounding the display unit 21, so as to reduce the size of the photosensitive unit 22 and increase the number of photosensitive units 22 while keeping the size of the pixel opening 231 of the display panel 90 unchanged.

[0083] Based on the above embodiments, the material of the pixel defining layer 23 may include organic insulating materials such as polyimide, polyphthalimide, polyphthalamide, acrylic resin, benzocyclobutene or phenolic resin, or inorganic insulating materials such as silicon oxide and silicon nitride. The pixel defining layer 23 may be a single-layer structure or a multi-layer structure, which is not specifically limited here.

[0084] On the basis of the above-mentioned embodiment, the display unit 21 includes a first electrode, a light-emitting layer and a second electrode. The light-emitting layer may include a small molecule organic material or a polymer molecule organic material, and may be a fluorescent light-emitting material or a phosphorescent light-emitting material, and may emit red light, green light, blue light, or white light. The first electrode may include a conductive material. The conductive material may include, for example, a metal, a metal alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc. The first electrode may have a multilayer structure. The second electrode may include a conductive material, for example, the conductive material may include a metal, a metal alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc. Further, as required, the display unit 21 may also include a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, etc.

[0085] In the embodiment of the present invention, the display unit 21 may be a top emission type or a bottom emission type. When the top emission type is adopted, the first electrode includes a conductive material with light reflection performance or includes a light reflection film, and the second electrode includes a transparent or translucent conductive material. When the bottom emission type is adopted, the second electrode includes a conductive material with light reflection performance or includes a light reflection film, and the first electrode includes a transparent or translucent conductive material.

[0086] The encapsulation layer 60 is disposed on the pixel defining layer 23 and covers the display unit 21 of the display area to seal the display unit 21, thereby reducing or preventing degradation of the display unit 21 caused by moisture and / or oxygen included in the environment.

[0087] On the basis of the above-mentioned embodiment, the encapsulation layer 60 can be a single-layer structure or a multi-layer structure, and the multi-layer structure includes a stacked structure of an inorganic encapsulation sublayer and an organic encapsulation sublayer. No specific limitation is made here. It is only necessary to ensure that the layer structure of the encapsulation layer 60 in contact with the second optical layer 40 is an inorganic material. The second optical layer 40 is in contact with the inorganic material, which can prevent the generation of gas and reduce the damage to the internal structure of the display panel 90. For example, the encapsulation layer 60 is a single-layer structure, and the single-layer structure is an inorganic material; for another example, the encapsulation layer 60 is a two-layer structure, and the two-layer structure includes an inorganic encapsulation sublayer and an organic encapsulation sublayer, and the organic encapsulation sublayer is in contact with the display layer 20, and the inorganic encapsulation sublayer is arranged on the side of the organic encapsulation sublayer away from the display layer 20, and the second optical layer 40 is in contact with the inorganic encapsulation sublayer. The material of the above-mentioned inorganic encapsulation sublayer may include insulating materials such as silicon oxynitride (SiON), silicon oxide (SiOx), silicon nitride (SiNx), and polymer resin. Inorganic materials such as silicon oxynitride (SiON), silicon oxide (SiOx), and silicon nitride (SiNx) have high density and can prevent the intrusion of water, oxygen, etc.; the material of the above-mentioned organic encapsulation sublayer can be a polymer material containing a desiccant or a polymer material that can block water vapor, such as a polymer resin, etc. to planarize the surface of the display substrate, and can relieve the stress of the inorganic encapsulation sublayer, and can also include a desiccant and other water-absorbing materials to absorb water, oxygen and other substances that invade the interior.

[0088] Figure 4 FIG. 1 is a schematic diagram of a structure of another embodiment of a display panel in an embodiment of the present invention. Figure 4As shown, in this embodiment, the pixel defining layer 23 includes two identification openings 232, and the display layer 20 includes two photosensitive units 22, and the two photosensitive units are respectively located in the two identification openings 232, wherein the two fingerprint identification openings 232 can be arranged adjacent to each other or spaced apart, and no specific restrictions are made here. When the two identification openings 232 are spaced apart, there are multiple pixel openings 231 between them, and the number of pixel openings 231 spaced apart is related to the number of sub-pixels contained in a pixel, and the number of pixel openings 231 spaced apart between the two identification openings 232 is an integer multiple of the number of sub-pixels contained in a pixel. For example, a red pixel contains three sub-pixels of red, green, and blue, and three pixel openings 231 can be spaced apart between the two identification openings 232, or six pixel openings 231 can be spaced apart, and no specific restrictions are made here.

[0089] Figure 5 FIG. 1 is a schematic diagram of a structure of another embodiment of a display panel in an embodiment of the present invention. Figure 5 As shown, in this embodiment, the second optical sublayer 32 is only filled in the light-transmitting hole 51, and does not cover the filter film layer 50, so that the first optical sublayer 31 and the second optical sublayer 32 can still be stably connected, and the first optical sublayer 31 and the second optical sublayer 32 cooperate with each other to collimate the light.

[0090] Based on the above embodiment, the shape of the longitudinal section of the collimating portion 42 in the direction perpendicular to the display panel 90 may not be a semicircle, but may be a square, such as Figure 6 As shown, it can also be a trapezoid, such as Figure 7 shown.

[0091] Figure 8 FIG. 1 is a schematic diagram of a structure of a display device according to an embodiment of the present invention. Figure 8 As shown, the display device can be an OLED display device and any product or component with a display function, such as a television including an OLED display device, a digital camera, a mobile phone, a tablet computer, a smart watch, an e-book, a navigator, etc.

[0092] like Figure 8 As shown, the display device includes a display panel 90 of any one of the aforementioned embodiments, wherein the structure, function and implementation method of the display panel 90 are the same as those of the aforementioned embodiments and will not be repeated here.

[0093] The display device of the present embodiment includes a display panel 90. The display panel 90 provided in the present embodiment is provided with a first optical layer 30 and a second optical layer 40. The first optical layer 30 performs preliminary focusing and collimation on the light incident to the photosensitive unit 22 to ensure that more light is incident to the photosensitive unit 22, thereby increasing the light intensity received by the photosensitive unit 22, and facilitating rapid recognition of the photosensitive unit 22. The second optical layer 44 is used to remove the influence of stray light such as ambient light, and at the same time, the incident light can be focused and collimated for a second time to make the light irradiated to the photosensitive unit 22 more concentrated, thereby facilitating improved recognition efficiency of the photosensitive unit 22. Since the first optical layer 30 and the second optical layer 40 perform two collimations on the light incident to the photosensitive unit 22, the spot area where the light falls on the photosensitive unit 22 is reduced, thereby improving the recognition efficiency of the photosensitive unit 22 and reducing the area of ​​the photosensitive unit 22, thereby facilitating the use of space of the display panel 90.

[0094] In addition, in the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; A display layer located on one side of the substrate, the display layer comprising a display unit and a photosensitive unit; A first optical layer, wherein the first optical layer is located at a side of the display layer away from the substrate, and an orthographic projection of the first optical layer on the substrate covers an orthographic projection of the photosensitive unit on the substrate; A second optical layer, wherein the second optical layer is located between the first optical layer and the display layer, and the orthographic projection of the second optical layer on the substrate surrounds the orthographic projection of the photosensitive unit on the substrate.

2. The display panel according to claim 1, characterized in that: The first optical layer includes a first optical sublayer and a second optical sublayer sequentially stacked in a direction perpendicular to the substrate, the second optical sublayer is located between the first optical sublayer and the second optical layer, and the refractive index of the second optical sublayer is smaller than the refractive index of the first optical sublayer; Preferably, the difference between the refractive index of the first optical sublayer and the refractive index of the second optical sublayer is greater than 0.3; Preferably, the refractive index of the first optical sublayer is greater than 1.5, and the refractive index of the second optical sublayer is less than 1.

4.

3. The display panel according to claim 2, characterized in that: The orthographic projection of the first optical sublayer on the substrate covers the orthographic projection of the photosensitive unit on the substrate, and the orthographic projection of the first optical sublayer on the substrate is located within the orthographic projection of the second optical sublayer on the substrate; Preferably, the orthographic projection of the first optical sublayer on the substrate covers and exceeds the orthographic projection of the photosensitive unit on the substrate; Preferably, the distance from the outer edge of the orthographic projection of the photosensitive unit on the substrate to the outer edge of the orthographic projection of the light-transmitting hole on the substrate is greater than or equal to 2 um.

4. The display panel according to claim 2, characterized in that: The display panel also includes a light filter film layer, which is arranged on a side of the second optical layer away from the substrate, the light filter film layer has a light-transmitting hole, the orthographic projection of the light-transmitting hole on the substrate covers the orthographic projection of the photosensitive unit on the substrate, at least a portion of the second optical sublayer is filled in the light-transmitting hole, and the orthographic projection of the first optical sublayer on the substrate covers the orthographic projection of the light-transmitting hole on the substrate.

5. The display panel according to claim 2, characterized in that: The first optical sublayer comprises a plurality of lenses, and a side of the lenses facing away from the substrate is a convex surface; Preferably, a size of a surface of the lens facing away from the substrate is smaller than a size of a surface of the lens close to the substrate.

6. The display panel according to claim 2, characterized in that: The first optical sublayer and the second optical sublayer both include organic materials.

7. The display panel according to claim 1, characterized in that: The second optical layer comprises a light-transmitting portion and a collimating portion, wherein the collimating portion surrounds the light-transmitting portion, and an orthographic projection of the light-transmitting portion on the substrate covers an orthographic projection of the photosensitive unit on the substrate; Preferably, the material of the collimating portion includes molybdenum or black glue.

8. The display panel according to claim 1, characterized in that: The display panel further includes: An encapsulation layer, the encapsulation layer is arranged on a side of the display layer away from the substrate, and the encapsulation layer includes at least one inorganic encapsulation sublayer; The touch layer is located on a side of the encapsulation layer away from the display layer, the second optical layer is embedded in the touch layer and in contact with the inorganic encapsulation sublayer; or, the second optical layer is disposed between the encapsulation layer and the touch layer.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display layer also includes a pixel defining layer, which is arranged on one side of the substrate, and the pixel defining layer has a pixel opening and an identification opening, a part of the display unit is located in the pixel opening, the photosensitive unit is located in the identification opening, the opening area of ​​the identification opening is smaller than the opening area of ​​the pixel opening, and / or the width of the pixel defining layer surrounding the photosensitive unit is smaller than the width of the pixel defining layer surrounding the display unit.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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