Display panel and display device

Abstract

The invention provides a display panel and a display device, and the display panel comprises a display substrate which comprises a photoelectric detector; the first insulating layer is located on one side of the display substrate, a first open groove is formed in the first insulating layer, and the first open groove extends into the first insulating layer from the surface of the side, away from the display substrate, of the first insulating layer and is opposite to the photoelectric detector; the second insulating layer is located on the side, away from the display substrate, of the first insulating layer, the first open groove is filled with at least part of the second insulating layer, and the refractive index of the first insulating layer is smaller than that of the second insulating layer. And the fingerprint identification precision of the display panel is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display panel and a display device. Background Technology

[0002] The display panel includes a display substrate, a touch layer located on one side of the display substrate, and a cover layer located on the side of the touch layer opposite to the display substrate. The display substrate includes pixel structures and a photodetector. A fingerprint reflects light emitted from the pixel structures to the photodetector, which converts the light signal into an electrical signal for fingerprint recognition. Summary of the Invention

[0003] The technical problem to be solved by this invention is how to improve the accuracy of fingerprint recognition on the display panel.

[0004] To address the aforementioned technical problems, the present invention provides a display panel, comprising: a display substrate, the display substrate including a photodetector; a first insulating layer located on one side of the display substrate, the first insulating layer having a first slot extending from the surface of the first insulating layer opposite to the display substrate into the first insulating layer and disposed opposite to the photodetector; and a second insulating layer located on the side of the first insulating layer opposite to the display substrate, at least a portion of the second insulating layer filling the first slot, the refractive index of the first insulating layer being less than the refractive index of the second insulating layer.

[0005] Optionally, the first slot penetrates the first insulating layer, or the first slot extends from the surface of the first insulating layer away from the display substrate into a portion of the thickness of the first insulating layer.

[0006] Optionally, the display substrate includes a substrate, and the photodetector is located on one side of the substrate; the inner wall of the first slot is arc-shaped, or the cross-sectional shape of the first slot perpendicular to the substrate is quadrilateral.

[0007] Optionally, it further includes: an optical path control layer located between the display substrate and the first insulating layer, the optical path control layer including a first light-shielding layer and a second light-shielding layer located on the side of the first light-shielding layer away from the display substrate, the first light-shielding layer having a second slot disposed opposite to the photodetector, the second slot penetrating the first light-shielding layer, the second light-shielding layer having a third slot disposed opposite to the second slot, the third slot penetrating the second light-shielding layer.

[0008] Optionally, the width of the third slot facing the photodetector is smaller than the width of the surface of the photodetector facing the first light-shielding layer.

[0009] Optionally, the display substrate further includes a pixel structure, which is disposed on the same layer as the photodetector; the first light-shielding layer also has a fourth slot spaced apart from the second slot and disposed opposite to the pixel structure, the fourth slot penetrating the first light-shielding layer; the second light-shielding layer also has a fifth slot spaced apart from the third slot and disposed opposite to the pixel structure, the fifth slot penetrating the second light-shielding layer; the width of the fifth slot and the width of the fourth slot are both greater than the width of the pixel structure.

[0010] Optionally, the first light-shielding layer is a first black matrix layer.

[0011] Optionally, the second light-shielding layer is a second black matrix layer; the display panel further includes a light-filtering layer located in the third and fifth slots.

[0012] Optionally, it further includes: a first planarization layer, located between the second light-shielding layer and the first light-shielding layer and filling the second slot and the fourth slot.

[0013] Optionally, it further includes: a touch structure located between the first planarization layer and the second light-shielding layer; the touch structure includes metal conductive lines; wherein the orthographic projection of the first light-shielding layer on the display substrate completely covers the orthographic projection of the metal conductive lines on the display substrate between adjacent third slots and fifth slots, between adjacent third slots, and between adjacent fifth slots.

[0014] Optionally, it further includes: a first additional light-shielding layer located on the side surface of the first light-shielding layer facing the second light-shielding layer; wherein the width of the side surface of the first additional light-shielding layer facing the first light-shielding layer is smaller than the width of the side surface of the first light-shielding layer facing the first additional light-shielding layer.

[0015] Optionally, it further includes: a second additional light-shielding layer; wherein the second additional light-shielding layer is located on the side surface of the second light-shielding layer opposite to the display substrate, and the width of the side surface of the second additional light-shielding layer facing the second light-shielding layer is smaller than the width of the side surface of the second light-shielding layer facing the second additional light-shielding layer; or, the second additional light-shielding layer is located on the side surface of the second light-shielding layer facing the first light-shielding layer, and the width of the side surface of the second additional light-shielding layer opposite to the second light-shielding layer is smaller than the width of the side surface of the second light-shielding layer facing the second additional light-shielding layer, and the width of the side surface of the second additional light-shielding layer facing the second light-shielding layer is less than or equal to the width of the side surface of the second light-shielding layer facing the second additional light-shielding layer.

[0016] This application also provides a display device, including the display panel of this application.

[0017] The technical solution of this invention has the following technical effects:

[0018] The display panel and display device provided by this invention include a photodetector for receiving light reflected from a fingerprint on the display panel and converting the light into an electrical signal, thereby achieving fingerprint recognition. The light reflected from the fingerprint is deflected by the sidewall interface of the first slot. A portion of the light received by the photodetector is also deflected by the sidewall interface of the first slot, reducing the angular range of the fingerprint-reflected light that the photodetector can recognize, thus reducing the fingerprint recognition range and improving the fingerprint recognition accuracy of the display panel. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a display panel according to one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a display panel in another embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the optical path of a display panel in related technologies;

[0023] Figure 4 for Figure 2 A schematic diagram of the optical path of the display panel;

[0024] Figure 5 This is a schematic diagram of a display panel in yet another embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a display panel in yet another embodiment of this application;

[0026] Figure 7 This is a schematic diagram of a display panel in another embodiment of this application.

[0027] Figure 8 This is a schematic diagram of a display panel in another embodiment of this application. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] One embodiment of the present invention provides a display panel, with reference to... Figure 1 and Figure 2 ,include:

[0033] Display substrate 100, the display substrate 100 includes a photodetector 109;

[0034] The first insulating layer 208 is located on one side of the display substrate 100. The first insulating layer 208 has a first slot S1. The first slot S1 extends from the surface of the first insulating layer 208 away from the display substrate 100 into the first insulating layer 208 and is disposed opposite to the photodetector 109.

[0035] The second insulating layer 209 is located on the side of the first insulating layer 208 away from the display substrate 100. At least a portion of the second insulating layer 209 is filled into the first slot S1. The refractive index of the first insulating layer 208 is less than the refractive index of the second insulating layer 209.

[0036] In this embodiment, the display panel uses a photodetector 109 to receive light reflected from a fingerprint on the display panel 100 and convert that light into an electrical signal, thereby achieving fingerprint recognition. The light reflected from the fingerprint is deflected by the sidewall interface of the first slot S1. A portion of the light received by the photodetector 109 is also deflected by the sidewall interface of the first slot S1, reducing the angular range of the fingerprint-reflected light that the photodetector 109 can recognize. This reduces the fingerprint recognition range and thus improves the fingerprint recognition accuracy of the display panel. For example, as... Figures 1 to 2 In the above, the angular range of ray B is smaller than that of ray A.

[0037] The display panel can be an organic light-emitting diode (OLED) display panel.

[0038] In one embodiment, the material of the first insulating layer 208 may be at least one selected from acrylic adhesive, silicone, and polyimide. The material of the second insulating layer 209 may be at least one selected from acrylic adhesive, silicone, and polyimide, and the material of the second insulating layer 209 may be zirconium oxide.

[0039] In other embodiments, while ensuring that the refractive index of the first insulating layer 208 is less than that of the second insulating layer 209, the material of the first insulating layer 208 may also be other materials, and the material of the second insulating layer 209 may also be other materials.

[0040] In one embodiment, the photodetector 109 can be an organic photodetector.

[0041] In one embodiment, the display substrate 100 includes: a substrate 101; a bottom planarization layer 102 located on the side of the substrate 101 facing the first insulating layer 208; a pixel defining layer 103 located on the side of the bottom planarization layer 102 facing away from the substrate 101, the pixel defining layer 103 having a pixel opening and a detector opening; a pixel structure 104 located in the pixel opening; wherein a photodetector 109 is located in the detector opening; and an encapsulation layer 108 located on the side of the pixel structure 104, the photodetector 109, and the pixel defining layer 103 facing away from the substrate 101. The pixel structure 104 and the photodetector 109 are disposed on the same layer.

[0042] The material of the bottom planarization layer 102 is an organic material, but is not limited to it. The material of the pixel defining layer 103 is an organic material, but is not limited to it.

[0043] In one embodiment, the substrate 101 includes: a substrate; a driving circuit layer located on one side of the substrate, the driving circuit layer including a thin-film transistor, and further, the driving circuit layer also including a capacitor.

[0044] In one embodiment, the pixel structure 104 is a light-emitting layer. The display substrate 100 further includes a first anode layer (not shown) and a cathode layer 110. The pixel structure 104 is located between the first anode layer and the cathode layer 110. The first anode layer is located on the side of the pixel structure 104 facing the underlying planarization layer 102, and the cathode layer 110 is located on the side of the pixel structure 104 opposite to the first anode layer and extends to the side of the pixel defining layer 103 opposite to the substrate 101. An encapsulation layer 108 is located on the side of the cathode layer 110 opposite to the substrate 101.

[0045] In one embodiment, the display substrate 100 further includes a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. The hole injection layer is located between the first anode layer and the light-emitting layer, the hole transport layer is located between the hole injection layer and the light-emitting layer, the electron transport layer is located on the side of the light-emitting layer opposite to the first anode layer, and the electron injection layer is located between the electron transport layer and the cathode layer.

[0046] In one embodiment, the display substrate 100 further includes a second anode layer (not shown), located on the side of the photodetector 109 facing the bottom planarization layer 102. The photodetector 109 is connected to the cathode layer and is also connected to the second anode layer. The second anode layer and the first anode layer can be disposed on the same layer.

[0047] The encapsulation layer 108 can seal the pixel structure 104 to prevent moisture and other substances from flowing into the pixel structure 104 from the outside. The encapsulation layer 108 includes one or more organic encapsulation layers and one or more inorganic encapsulation layers. For example, refer to... Figure 1 and Figure 2 The encapsulation layer 108 includes a first inorganic encapsulation layer 105, an organic encapsulation layer 106, and a second inorganic encapsulation layer 107. The first inorganic encapsulation layer 105 is located on the side of the cathode layer 110 facing away from the substrate 101. The organic encapsulation layer 106 is located on the side of the first inorganic encapsulation layer 105 facing away from the substrate 101. The second inorganic encapsulation layer 107 is located on the side of the organic encapsulation layer 106 facing away from the first inorganic encapsulation layer 105. The first inorganic encapsulation layer 105 and the second inorganic encapsulation layer 107 can prevent moisture and oxygen from penetrating into the pixel structure 104. The organic encapsulation layer 106 can improve the flatness of the encapsulation layer 108.

[0048] The first slot S1 is positioned opposite to the photodetector 109, meaning that the orthographic projection of the first slot S1 on the substrate and the orthographic projection of the photodetector 109 on the substrate overlap.

[0049] In one embodiment, reference Figure 2 The first slot S1 penetrates the first insulating layer 208. (Reference) Figure 1 The first slot S1 extends from the side surface of the first insulating layer 208 away from the display substrate 100 into a portion of the thickness of the first insulating layer 208.

[0050] In one embodiment, reference Figure 1 The inner wall of the first slot S1 is curved.

[0051] In one embodiment, reference Figure 2 The first slot S1 has a quadrilateral shape along its cross-section perpendicular to the substrate. For example, the quadrilateral can be a trapezoid, rectangle, or square. Figure 2 The example uses a trapezoidal cross-sectional shape of the first slot S1 perpendicular to the substrate. Furthermore, the first slot S1 has a trapezoidal cross-sectional shape perpendicular to the substrate, with the top edge of the trapezoid facing away from the display substrate 100 having a larger dimension than the bottom edge of the trapezoid facing the display substrate 100. This facilitates directing the light reflected from the fingerprint to the sidewall of the first slot S1 and deflecting it to the photodetector 109.

[0052] It should be noted that, Figure 1 In the process, when the first slot S1 extends from the surface of the first insulating layer 208 away from the display substrate 100 into a portion of the thickness of the first insulating layer 208, Figure 1 In the example where the inner wall of the first slot S1 is curved, in other embodiments, the cross-sectional shape of the first slot perpendicular to the substrate may also be quadrilateral. Figure 2 In the middle, when the first slot S1 penetrates the first insulating layer 208, Figure 2 As an example, the cross-sectional shape of the first slot S1 perpendicular to the substrate can also be a quadrilateral. In other embodiments, the inner wall of the first slot can be an arc surface.

[0053] In one embodiment, the display panel further includes a light path control layer located between the display substrate 100 and the first insulating layer 208. The light path control layer includes a first light-shielding layer 201 and a second light-shielding layer 205 located on the side of the first light-shielding layer 201 facing away from the display substrate 100. The first light-shielding layer 201 has a second slot S2 disposed opposite to the photodetector 109, and the second slot S2 penetrates the first light-shielding layer 201. The second light-shielding layer 205 has a third slot S3 disposed opposite to the second slot S2, and the third slot S3 penetrates the second light-shielding layer 205. The second slot S2 of the first light-shielding layer 201 and the third slot S3 of the second light-shielding layer 205 collimate the light path of the fingerprint-reflected light transmitted to the photodetector 109, and increase the signal-to-noise ratio of the light signal received by the photodetector 109.

[0054] The second slot S2 is positioned opposite to the photodetector 109, meaning that the orthographic projection of the second slot S2 on the substrate and the orthographic projection of the photodetector 109 on the substrate overlap.

[0055] The third slot S3 is positioned opposite to the second slot S2, meaning that the orthographic projection of the third slot S3 on the substrate and the orthographic projection of the second slot S2 on the substrate overlap.

[0056] In one embodiment, the width of the third slot S3 facing the photodetector 109 is smaller than the width of the surface of the photodetector 109 facing the first light-shielding layer 201, so as to better collimate the light path of the light reflected from the fingerprint to the photodetector 109.

[0057] In one embodiment, the difference in width of the surface of the photodetector 109 facing the first light-shielding layer 201 is 6 micrometers to 14 micrometers, for example, 6 micrometers, 8 micrometers, 10 micrometers, 12 micrometers or 14 micrometers.

[0058] In one embodiment, the width of the surface of the photodetector 109 facing the first light-shielding layer 201 is 6 micrometers to 14 micrometers, and the width of the end of the third slot S3 facing the photodetector 109 is less than 6 micrometers, for example, 5.8 micrometers, 5 micrometers, 4 micrometers, 3 micrometers, or 2 micrometers. The width of the end of the third slot S3 facing the photodetector 109 being less than 6 micrometers improves the collimation effect of the third slot S3 on the light path transmitted from the fingerprint to the photodetector 109. If the third slot S3 is too small, the intensity of the light beam transmitted from the fingerprint to the photodetector 109 will decrease, which is detrimental to fingerprint recognition. Therefore, the width of the end of the third slot S3 facing the photodetector 109 is set to be greater than or equal to 2 micrometers.

[0059] In one embodiment, the spacing between the second light-shielding layer 205 and the photodetector 109 in a direction perpendicular to the substrate is 16 micrometers to 23 micrometers, for example, 16 micrometers, 18 micrometers, 20 micrometers, 22 micrometers, or 23 micrometers. Maintaining the spacing between the second light-shielding layer 205 and the photodetector 109 in a direction parallel to or perpendicular to the substrate within a certain range is beneficial for improving the integration of the display panel.

[0060] In one embodiment, for example, the width of the surface of the photodetector 109 facing the first light-shielding layer 201 is 8 micrometers to 12 micrometers, for example, 8 micrometers, 10 micrometers, or 12 micrometers. The width of the second slot S2 facing one end of the photodetector 109 is 3 micrometers to 5 micrometers, for example, 3 micrometers, 4 micrometers, or 5 micrometers. The width of the third slot S3 facing one end of the photodetector 109 is 3 micrometers to 5 micrometers, for example, 3 micrometers, 4 micrometers, or 5 micrometers.

[0061] It should be noted that in other embodiments, there are no restrictions on the width of the surface of the photodetector 109 facing the first light-shielding layer 201, the width of the second slot S2 facing one end of the photodetector 109, and the width of the third slot S3 facing one end of the photodetector 109.

[0062] For example, the width of the end of the second slot S2 facing the photodetector 109 along the first direction is smaller than the width of the surface of the photodetector 109 facing the first light-shielding layer 201 along the first direction, and the width of the end of the second slot S2 facing the photodetector 109 along the second direction is smaller than the width of the surface of the photodetector 109 facing the first light-shielding layer 201 along the second direction. The first direction and the second direction intersect, and both the first direction and the second direction are parallel to the substrate. Furthermore, the first direction and the second direction are perpendicular.

[0063] For example, the width of the third slot S3 at one end facing the photodetector 109 along the first direction is smaller than the width of the surface of the photodetector 109 facing the first light-shielding layer 201 along the first direction, and the width of the third slot S3 at one end facing the photodetector 109 along the second direction is smaller than the width of the surface of the photodetector 109 facing the first light-shielding layer 201 along the second direction.

[0064] In one embodiment, the first light-shielding layer 201 further has a fourth slot S4 spaced apart from the second slot S2 and disposed opposite to the pixel structure 104, the fourth slot S4 penetrating the first light-shielding layer 201. The second light-shielding layer 205 further has a fifth slot S5 spaced apart from the third slot S3 and disposed opposite to the pixel structure 104, the fifth slot S5 penetrating the second light-shielding layer 205. The width of the fifth slot S5 and the width of the fourth slot S4 are both greater than the width of the pixel structure 104, which is beneficial to improving the display viewing angle.

[0065] In other embodiments, the width of the fifth slot S5 may be less than or equal to the width of the pixel structure 104, and the width of the fourth slot S4 may be less than or equal to the width of the pixel structure 104.

[0066] The fourth slot S4 is positioned opposite to the pixel structure 104, meaning that the orthographic projection of the fourth slot S4 on the substrate overlaps with the orthographic projection of the pixel structure 104 on the substrate. The fifth slot S5 is positioned opposite to the pixel structure 104, meaning that the orthographic projection of the fifth slot S5 on the substrate overlaps with the orthographic projection of the pixel structure 104 on the substrate.

[0067] In one embodiment, the first light-shielding layer 201 is a first black matrix layer. In other embodiments, the material of the first light-shielding layer 201 may also be other insulating light-shielding materials, which are not limited here.

[0068] In one embodiment, the second light-shielding layer 205 is a second black matrix layer; the display panel further includes a light filter layer 206, which is located in the third and fifth slots. The light filter layer 206 is used to reduce the reflectivity of ambient light. The light filter layer 206 can be a color light filter layer 206.

[0069] In other embodiments, the material of the second light-shielding layer may also be other insulating light-shielding materials, which are not limited here.

[0070] In one embodiment, the display panel further includes: a first planarization layer 202, located between the second light-shielding layer 205 and the first light-shielding layer 201 and filled in the second slot S2 and the fourth slot S4.

[0071] In one embodiment, the display panel further includes a touch structure 203 located between the first planarization layer 202 and the second light-shielding layer 205. The touch structure 203 includes a metal conductive line 204. The metal conductive line 204 has a high reflectivity to light. The first light-shielding layer 201 can effectively absorb light irradiated from the pixel structure 104 toward the metal conductive line 204, reducing the probability that the first light-shielding layer 201 reflects the light emitted by the pixel structure 104 to the photodetector 109, thereby increasing the brightness difference of the reflected light from the fingerprint ridges and improving the signal-to-noise ratio of the photodetector 109.

[0072] In one embodiment, the orthographic projection of the first light-shielding layer 201 on the display substrate 100 completely covers the orthographic projection of the metal conductive lines on the display substrate 100 between adjacent third slots S3 and fifth slots S5, between adjacent third slots S3, and between adjacent fifth slots S5.

[0073] In one embodiment, the width of the second slot S2 is greater than or equal to the width of the third slot S3. This ensures that the second slot S2 does not obstruct the light transmitted from the third slot S3 to the photodetector 109 as much as possible. For example, the width of the second slot S2 along the first direction is greater than or equal to the width of the third slot S3 along the first direction, and the width of the second slot S2 along the second direction is greater than or equal to the width of the third slot S3 along the second direction.

[0074] contrast Figure 3 The display panel and Figure 4 The display panel. Figure 3 The display panel has a second light-shielding layer 205 but no first light-shielding layer, and the photodetector 109 receives stray light with a wide viewing angle. Figure 4 The display panel includes a first light-shielding layer 201 and a second light-shielding layer 205, which can absorb stray light from a wide viewing angle.

[0075] In one embodiment, the display panel further includes a cover plate 210 located on the side of the second insulating layer 209 facing away from the display substrate 100. The cover plate 210 may be a transparent polyimide cover plate or an ultrasonic flexible glass cover plate.

[0076] Another embodiment of this application also provides a display panel, the difference between the display panel of this embodiment and the display panel of the foregoing embodiments is that: (Refer to...) Figure 5The display panel further includes a first additional light-shielding layer 201a, located on the side surface of the first light-shielding layer 201 facing the second light-shielding layer 205; wherein the width of the side surface of the first additional light-shielding layer 201a facing the first light-shielding layer 201 is smaller than the width of the side surface of the first light-shielding layer 201 facing the first additional light-shielding layer 201a. The increased total thickness of the first additional light-shielding layer 201a and the first light-shielding layer 201 improves the noise shielding effect of the photodetector 109. Furthermore, the first additional light-shielding layer 201a uses less material than the first light-shielding layer 201, reducing costs compared to directly increasing the thickness of the first light-shielding layer 201. Simultaneously, it has no or minimal impact on the viewing angle, offering certain advantages.

[0077] In one embodiment, the material of the first additional light-shielding layer 201a is the same as the material of the first light-shielding layer 201. In another embodiment, the material of the first additional light-shielding layer 201a is different from the material of the first light-shielding layer 201.

[0078] Another embodiment of this application also provides a display panel, the difference between the display panel of this embodiment and the display panel of the foregoing embodiments is that: (Refer to...) Figure 6 , Figure 7 and Figure 8 The display panel also includes a second additional light-shielding layer 205a. The increased total thickness of the second additional light-shielding layer 205a and the second light-shielding layer 205 improves the noise shielding effect of the photodetector 109. Furthermore, the second additional light-shielding layer 205a uses less material than the second light-shielding layer 205, resulting in lower costs compared to directly increasing the thickness of the second light-shielding layer 205. Simultaneously, it has no impact on the viewing angle, or only a relatively small impact, offering certain advantages.

[0079] In one embodiment, the material of the second additional light-shielding layer 205a is the same as the material of the second light-shielding layer 205. In another embodiment, the material of the second additional light-shielding layer 205a is different from the material of the second light-shielding layer 205.

[0080] In one embodiment, reference Figure 6 The second additional light-shielding layer 205a is located on the side surface of the second light-shielding layer 205 away from the display substrate 100, and the width of the side surface of the second additional light-shielding layer 205a facing the second light-shielding layer 205 is smaller than the width of the side surface of the second light-shielding layer 205 facing the second additional light-shielding layer 205a.

[0081] In one embodiment, reference Figure 7 and Figure 8The second additional light-shielding layer 205a is located on the side surface of the second light-shielding layer 205 facing the first light-shielding layer. The width of the side surface of the second additional light-shielding layer 205a away from the second light-shielding layer 205 is smaller than the width of the side surface of the second light-shielding layer 205 facing the second additional light-shielding layer 205a. The width of the side surface of the second additional light-shielding layer 205a facing the second light-shielding layer 205 is less than or equal to the width of the side surface of the second light-shielding layer 205 facing the second additional light-shielding layer 205a. (Reference) Figure 7 The width of the surface of the second additional light-shielding layer 205a facing away from the second light-shielding layer 205 is smaller than the width of the surface of the second light-shielding layer 205 facing the second additional light-shielding layer 205a. (Reference) Figure 8 The width of the side surface of the second additional light-shielding layer 205a facing away from the second light-shielding layer 205 is less than the width of the side surface of the second light-shielding layer 205 facing the second additional light-shielding layer 205a, and the width of the side surface of the second additional light-shielding layer 205a facing the second light-shielding layer 205 is equal to the width of the side surface of the second light-shielding layer 205 facing the second additional light-shielding layer 205a.

[0082] Another embodiment of this application provides a display panel, including a first additional light-shielding layer and a second additional light-shielding layer, the positions of which refer to the description of the foregoing embodiments.

[0083] Another embodiment of this application provides a display device, including: the display panel provided in the above embodiments.

[0084] Since the principle by which this display device solves the problem is similar to that of the aforementioned display panel, the implementation of the display panel in this display device can refer to the implementation of the aforementioned display panel, and repeated details will not be repeated. This display device can be any product or component with display functionality, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the present invention.

[0085] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: The display substrate includes a photodetector; A first insulating layer is located on one side of the display substrate. The first insulating layer has a first slot, which extends from the surface of the first insulating layer away from the display substrate into the first insulating layer and is disposed opposite to the photodetector. The second insulating layer is located on the side of the first insulating layer away from the display substrate, and at least a portion of the second insulating layer fills the first slot. The refractive index of the first insulating layer is less than that of the second insulating layer.

2. The display panel according to claim 1, characterized in that, The first slot penetrates the first insulating layer, or the first slot extends from the surface of the first insulating layer away from the display substrate into a portion of the thickness of the first insulating layer.

3. The display panel according to claim 1, characterized in that, The display substrate includes a substrate, and the photodetector is located on one side of the substrate; The inner wall of the first slot is arc-shaped, or the cross-sectional shape of the first slot perpendicular to the substrate is quadrilateral.

4. The display panel according to claim 1, characterized in that, Also includes: An optical path control layer is located between the display substrate and the first insulating layer. The optical path control layer includes a first light-shielding layer and a second light-shielding layer located on the side of the first light-shielding layer away from the display substrate. The first light-shielding layer has a second slot disposed opposite to the photodetector and the second slot penetrates the first light-shielding layer. The second light-shielding layer has a third slot disposed opposite to the second slot and the third slot penetrates the second light-shielding layer.

5. The display panel according to claim 4, characterized in that, The width of the third slot facing the photodetector is smaller than the width of the surface of the photodetector facing the first light-shielding layer.

6. The display panel according to claim 4, characterized in that, The display substrate further includes a pixel structure, which is disposed on the same layer as the photodetector; the first light-shielding layer also has a fourth slot spaced apart from the second slot and disposed opposite to the pixel structure, the fourth slot penetrating the first light-shielding layer; the second light-shielding layer also has a fifth slot spaced apart from the third slot and disposed opposite to the pixel structure, the fifth slot penetrating the second light-shielding layer; the width of the fifth slot and the width of the fourth slot are both greater than the width of the pixel structure.

7. The display panel according to claim 4, characterized in that, The first light-shielding layer is the first black matrix layer.

8. The display panel according to claim 6, characterized in that, The second light-shielding layer is a second black matrix layer; the display panel also includes a light-filtering layer located in the third and fifth slots.

9. The display panel according to claim 6, characterized in that, Also includes: The first flattening layer is located between the second light-shielding layer and the first light-shielding layer and fills the second slot and the fourth slot.

10. The display panel according to claim 9, characterized in that, Also includes: A touch structure is located between the first planarization layer and the second light-shielding layer; the touch structure includes metal conductive lines; Wherein, the orthographic projection of the first light-shielding layer on the display substrate completely covers the orthographic projection of the metal conductive lines on the display substrate between adjacent third and fifth slots, between adjacent third slots, and between adjacent fifth slots.

11. The display panel according to claim 4, characterized in that, Also includes: The first additional light-shielding layer is located on the side surface of the first light-shielding layer facing the second light-shielding layer; Wherein, the width of the side surface of the first additional light-shielding layer facing the first light-shielding layer is smaller than the width of the side surface of the first light-shielding layer facing the first additional light-shielding layer.

12. The display panel according to claim 4, characterized in that, Also includes: Second additional light-shielding layer; Wherein, the second additional light-shielding layer is located on the side surface of the second light-shielding layer that is away from the display substrate, and the width of the side surface of the second additional light-shielding layer facing the second light-shielding layer is smaller than the width of the side surface of the second light-shielding layer facing the second additional light-shielding layer. Alternatively, the second additional light-shielding layer is located on the side surface of the second light-shielding layer facing the first light-shielding layer, the width of the side surface of the second additional light-shielding layer away from the second light-shielding layer is less than the width of the side surface of the second light-shielding layer facing the second additional light-shielding layer, and the width of the side surface of the second additional light-shielding layer facing the second light-shielding layer is less than or equal to the width of the side surface of the second light-shielding layer facing the second additional light-shielding layer.

13. A display device, characterized in that, include: The display panel as described in any one of claims 1 to 12.

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