Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a substrate layer, a first light shielding layer and a reflection layer which are sequentially stacked. The first light shielding layer is provided with a plurality of first ambient light holes and a plurality of transmission holes. The reflection layer is provided with second ambient light holes corresponding to the positions of the first ambient light holes. The orthographic projection of the transmission holes on the substrate layer and the orthographic projection of the reflection layer on the substrate layer at least partially coincide. In this way, the light transmittance around the first ambient light holes can be improved.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a display panel and display device. Background Technology

[0002] With the widespread adoption of full-screen displays and consumers' pursuit of integrated mobile phones, under-display fingerprint (FOD, Fingerprint-On-Display or Fingerprint under display) technology has become one of the main fingerprint recognition technologies.

[0003] However, existing under-display fingerprint areas suffer from low light transmittance, which affects the accuracy of fingerprint recognition. Summary of the Invention

[0004] This application provides a display panel and display device that can improve the light transmittance around a first ambient light aperture.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a display panel, including a substrate layer, a first light-shielding layer and a reflective layer stacked in sequence; the first light-shielding layer is provided with a plurality of first ambient light holes and a plurality of transmission holes, the reflective layer is provided with a second ambient light hole at the position corresponding to the first ambient light holes, and the orthographic projection of the transmission holes on the substrate layer at least partially coincides with the orthographic projection of the reflective layer on the substrate layer.

[0006] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a display device, including the display panel and optical sensor described in any of the above embodiments, wherein the position of the optical sensor corresponds to the first ambient light aperture.

[0007] Unlike existing technologies, the advantages of this application are as follows: The display panel provided in this application includes a substrate layer, a first light-shielding layer, and a reflective layer stacked sequentially. The first light-shielding layer is provided with multiple first ambient light holes and multiple transmission holes. The reflective layer is provided with second ambient light holes at positions corresponding to the first ambient light holes, and the orthographic projection of the transmission holes onto the substrate layer at least partially overlaps with the orthographic projection of the reflective layer onto the substrate layer. This design allows at least a portion of the second light rays, when they are incident on the substrate layer through the first and second ambient light holes and form second light rays away from the substrate layer, to pass through the transmission holes and enter the reflective layer, where they are reflected into third light rays towards the substrate layer, thereby increasing the light transmittance of the display area around the first ambient light holes. When the first ambient light holes correspond to the under-display fingerprint area, this design allows for a higher light transmittance in the under-display fingerprint area during fingerprint recognition, thus improving the accuracy of fingerprint recognition. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0009] Figure 1 This is a schematic diagram of the structure of one embodiment of the display panel of this application;

[0010] Figure 2 for Figure 1 A top view schematic diagram of one embodiment of the central display panel;

[0011] Figure 3 This is a schematic diagram of the structure of one embodiment of the display device of this application. Detailed Implementation

[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0013] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of one embodiment of the display panel of this application. The display panel 1 provided in this application can be an OLED display panel or the like, and it can include a substrate layer 10, a first light-shielding layer 12 and a reflective layer 14 stacked sequentially.

[0014] Specifically, the substrate 10 can be a transparent rigid substrate, and its material can be glass or the like; or, the substrate 10 can be a transparent flexible substrate, and its material can be polyimide or the like.

[0015] The first light-shielding layer 12 can be made of a black organic material, which can absorb part of the incident light incident on the display panel 1, so that the display panel 1 has good contrast when displayed under strong ambient light. The first light-shielding layer 12 is provided with a plurality of first ambient light holes 120 and a plurality of through holes 122. Optionally, the orthographic projections of the first ambient light holes 120 and through holes 122 on the substrate layer 10 can be circular, elliptical, square, etc. Alternatively, the size (e.g., radius) of the orthographic projection of the first ambient light holes 120 on the substrate layer 10 can be greater than or equal to the size (e.g., radius) of the orthographic projection of the through holes 122 on the substrate layer 10.

[0016] A second ambient light aperture 140 is disposed on the reflective layer 14 corresponding to the position of the first ambient light aperture 120, and the orthographic projection of the through aperture 122 on the substrate layer 10 at least partially coincides with the orthographic projection of the reflective layer 14 on the substrate layer 10. The correspondence between the first ambient light aperture 120 and the second ambient light aperture 140 can be understood as the orthographic projections of the first ambient light aperture 120 and the second ambient light aperture 140 on the substrate layer 10 at least partially coinciding. Preferably, the orthographic projection of the first ambient light aperture 120 on the substrate layer 10 lies within the orthographic projection of the second ambient light aperture 140 on the substrate layer 10.

[0017] As can be seen, the design of the first ambient light aperture 120 and the second ambient light aperture 140 in the above-described design allows the first ambient light L1 to enter the display panel 1 through the first ambient light aperture 120 and the second ambient light aperture 140. At least a portion of the first ambient light L1 is reflected inside the display panel 1 to form a second ambient light L2 facing away from the substrate layer 10. Due to the introduction of the through-hole 122 and the reflective layer 14, at least a portion of the second ambient light L2 can pass through the through-hole 122 and enter the reflective layer 14. Due to the reflection effect of the reflective layer 14, the second ambient light L2 can be reflected into a third ambient light L3 facing the substrate layer 10. The generation of this third ambient light L3 can increase the light transmittance around the first ambient light aperture 120. When an optical sensor is provided on the side of the substrate layer 10 facing away from the first light-shielding layer 12, this design can improve the intensity of the light collected by the optical sensor during operation, thereby improving the accuracy of the optical sensor. For example, when the optical sensor is a fingerprint recognition sensor, the location of the first ambient light hole 120 can be called the under-display fingerprint area. The above design can make the light transmittance of the under-display fingerprint area larger during fingerprint recognition, thereby improving the accuracy of fingerprint recognition.

[0018] In some embodiments, the reflective layer 14 is made of metal or a metal compound. For example, the reflective layer 14 may be made of at least one of a copper-niobium-chromium composite metal, a silver-palladium-copper composite metal, molybdenum, or aluminum. Alternatively, the reflective layer 14 may be made of aluminum oxide, aluminum nitride, etc. A reflective layer 14 made of metal or a metal compound has a higher reflectivity, which can increase the amount of the third ray L3 reflected by the reflective layer 14, thereby increasing the intensity of the light collected by the optical sensor during operation and improving the accuracy of the optical sensor. For example, when the optical sensor is a fingerprint recognition sensor, it can increase the transmittance of the under-display fingerprint area during fingerprint recognition, thereby improving the accuracy of fingerprint recognition.

[0019] Optionally, the reflective layer 14 can be used as a touch electrode layer. That is, the reflective layer 14 can be reused as a touch electrode layer to reduce the thickness of the display panel 1 in the stacking direction X.

[0020] In some implementations, such as Figure 2 As shown, Figure 2 for Figure 1 A top view schematic diagram of one embodiment of the display panel 1. The display panel 1 includes a first display area AA1 and a second display area AA2, wherein the light transmittance of the first display area AA1 is less than the light transmittance of the second display area AA2. Figure 1 The first ambient light aperture 120, the through aperture 122, and the second ambient light aperture 140 are located in the second display area AA2. That is, only a portion of the display area in the display panel 1 requires high light transmittance. When the second display area AA2 is an under-display fingerprint area, this design is relatively simple and allows for higher fingerprint recognition accuracy. Of course, in some cases, the display panel 1 can also be a full-screen fingerprint recognition system. In this case, both the first display area AA1 and the second display area AA2 can be correspondingly equipped with [specific features / equipment]. Figure 1 The first ambient light aperture 120, the through aperture 122, and the second ambient light aperture 140 are not limited in this application.

[0021] In some implementations, please refer to [the relevant documentation]. Figure 1 As a preferred configuration, the orthographic projection of the through-hole 122 onto the substrate 10 coincides with the orthographic projection of the corresponding reflective layer 14 onto the substrate 10. This design allows more second light rays L2 to pass through the through-hole 122 and incident on the surface of the reflective layer 14, thereby increasing the amount of third light rays L3 toward the substrate 10. Optionally, the shape of the orthographic projection of the through-hole 122 onto the substrate 10 is determined by the shape of the orthographic projection of the corresponding reflective layer 14 onto the substrate 10. For example, when the reflective layer 14 is a touch electrode layer, if the touch electrode layer at the location corresponding to the through-hole 122 is blocky, then the corresponding through-hole 122 is blocky; if the touch electrode layer at the location corresponding to the through-hole 122 is annular, then the corresponding through-hole 122 is annular.

[0022] In some implementations, such as Figure 1 As shown, at least one transmission hole 122 is provided around each first ambient light hole 120. For example, a plurality of transmission holes 122 are arranged at intervals along the outer periphery of each first ambient light hole 120. This design allows for a higher light transmittance around the first ambient light hole 120.

[0023] Optionally, such as Figure 1As shown, the first light-shielding layer 12 includes a black pixel definition layer, and the first light-shielding layer 12 is provided with a plurality of first pixel holes 124; each first pixel hole 124 may be provided with a light-emitting unit 16, and the light-emitting unit 16 may be a red light-emitting unit, a green light-emitting unit, or a blue light-emitting unit, etc. In the above design, the first light-shielding layer 12 is reused as a pixel definition layer, which can reduce the thickness of the display panel 1 in the stacking direction X. Optionally, the pixel definition layer is set to black, and the material of the black pixel definition layer may include organic materials and black fillers. Organic materials include, but are not limited to, polyimide, polymethyl methacrylate, and phenolic resin, and black fillers include, but are not limited to, black pigments, such as carbon black, etc. Alternatively, the thickness of the black pixel definition layer may be 1.0 micrometer-2.0 micrometers (e.g., 1.2 micrometers, 1.5 micrometers, 1.8 micrometers, etc.).

[0024] Furthermore, at least some of the adjacent first pixel holes 124 are provided with a first ambient light hole 120 and a transmission hole 122 on the first light-shielding layer 12. At this time, the introduction of the first ambient light hole 120 and the transmission hole 122 does not occupy or affect the original layout and opening size of the first pixel hole 124. This design allows the introduction of the first ambient light hole 120 and the transmission hole 122 to not affect the normal light emission display process, and allows the distance between the first ambient light hole 120 and the transmission hole 122 to be relatively close, so that the amount of second light L2 passing through the transmission hole 122 is greater, and thus the amount of third light L3 formed by the reflection of the second light L2 is greater, so as to improve the light transmittance around the first ambient light hole 120.

[0025] In an application scenario, such as Figure 2 As shown, when the display panel 1 includes a first display area AA1 with low light transmittance and a second display area AA2 with high light transmittance, a plurality of first pixel holes 124 are respectively provided on the first light-shielding layer 12 located in the first display area AA1 and the second display area AA2, and only the first light-shielding layer 12 located in the second display area AA2 is provided with a first ambient light hole 120 and a transmission hole 122.

[0026] In some embodiments, such as Figure 1As shown, the display panel 1 further includes a metal wiring layer 18 stacked between the substrate layer 10 and the first light-shielding layer 12; wherein, the metal wiring layer 18 has a third ambient light hole 180 at the position corresponding to the first ambient light hole 120, and wiring gaps 182 are provided around at least a portion of the third ambient light hole 180. Optionally, there can be multiple metal wiring layers 18, and multiple metal wiring layers 18 can form a pixel driving circuit, which is electrically connected to the light-emitting unit 16 and is used to drive the corresponding light-emitting unit 16 to emit light. Generally speaking, metal has poor transmittance, and the optical sensor is generally located on the side of the substrate layer 10 away from the metal wiring layer 18. The introduction of the third ambient light hole 180 can allow the first light ray L1 to pass smoothly into the optical sensor, thereby improving the accuracy of the optical sensor; and it can be seen that wiring gaps 182 are also provided around the third ambient light hole 180, and the wiring gaps 182 can allow the third light ray L3 to pass through the wiring gaps 182 to reach the optical sensor, thereby further improving the accuracy of the optical sensor.

[0027] Optionally, such as Figure 1 As shown, at least a portion of the orthographic projection of the wiring gap 182 onto the substrate 10 lies within the orthographic projection of the through-hole 122 onto the substrate 10. This design allows for a larger amount of the third ray L3 passing through the wiring gap 182, thereby further improving the accuracy of the optical sensor.

[0028] Alternatively, the orthographic projection of a through-hole 122 onto the substrate 10 may overlap the orthographic projections of at least two wiring slots 182 onto the substrate 10. That is, one through-hole 122 may correspond to at least two wiring slots 182. This design can further increase the amount of third light L3 passing through the wiring slots 182, thereby further improving the accuracy of the optical sensor.

[0029] Another option, such as Figure 1 As shown, the orthographic projection of the third ambient light aperture 180 on the substrate 10 covers the orthographic projection of the first ambient light aperture 120 on the substrate 10; that is, the size (e.g., radius) of the orthographic projection of the third ambient light aperture 180 on the substrate 10 is greater than or equal to the size (e.g., radius) of the orthographic projection of the first ambient light aperture 120 on the substrate 10. This design allows for a larger amount of the first light ray L1 incident on the display panel 1, thereby improving the accuracy of the optical sensor.

[0030] Alternatively, such as Figure 1As shown, the through-hole 122 includes a first boundary 1220 adjacent to the first ambient light aperture 120, and a second boundary 1880 of the orthographic projection of the third ambient light aperture 180 onto the substrate 10 at least partially coincides with the orthographic projection of the first boundary 1220 onto the substrate 10. This design can increase the amount of second light L2 passing through the through-hole 122, so that the amount of third light L3 subsequently generated by the second light L2 is greater.

[0031] In some embodiments, such as Figure 1 As shown, the display panel 1 further includes a second light-shielding layer 11 and a light-filtering layer 13; wherein, the second light-shielding layer 11 is stacked on the side of the reflective layer 14 facing away from the substrate layer 10; the second light-shielding layer 11 has a second pixel hole 110 at the position corresponding to the first pixel hole 124, and the light-filtering layer 13 fills the second pixel hole 110. The second light-shielding layer 11 has a fourth ambient light hole 112 at the position corresponding to the first ambient light hole 120.

[0032] The correspondence between the second pixel aperture 110 and the first pixel aperture 124 can be understood as follows: the orthographic projection of the second pixel aperture 110 on the substrate layer 10 covers at least a portion of the orthographic projection of the first pixel aperture 124 on the substrate layer 10. For example, the orthographic projection of the second pixel aperture 110 on the substrate layer 10 completely covers the orthographic projection of the first pixel aperture 124 on the substrate layer 10, and the size (e.g., radius) of the orthographic projection of the second pixel aperture 110 on the substrate layer 10 can be greater than or equal to the size (e.g., radius) of the orthographic projection of the first pixel aperture 124 on the substrate layer 10. This design can reduce the impact of the second light-shielding layer 11 on the light extraction efficiency.

[0033] The correspondence between the fourth ambient light aperture 112 and the first ambient light aperture 120 can be understood as follows: the orthographic projection of the fourth ambient light aperture 112 on the substrate 10 covers at least a portion of the orthographic projection of the first ambient light aperture 120 on the substrate 10. For example, the orthographic projection of the fourth ambient light aperture 112 on the substrate 10 completely covers the orthographic projection of the first ambient light aperture 120 on the substrate 10, and the size (e.g., radius) of the orthographic projection of the fourth ambient light aperture 112 on the substrate 10 can be greater than or equal to the size (e.g., radius) of the orthographic projection of the first ambient light aperture 120 on the substrate 10. This design can increase the amount of first light L1 entering the display panel 1, thereby increasing the accuracy of the optical sensor.

[0034] Optionally, the material of the second light-shielding layer 11 includes, but is not limited to, at least one of a mixture of ferrous metals (e.g., chromium), organic materials, and black pigments. The specific material of the light-filtering layer 13 is related to the color of the light emitted by the light-emitting unit 16 below it. For example, when the light-emitting unit 16 is a red light-emitting unit, the light-filtering layer 13 above it can only allow red light emitted by the red light-emitting unit to pass through while absorbing other colors of light; when the light-emitting unit 16 is a blue light-emitting unit, the light-filtering layer 13 above it can only allow blue light emitted by the blue light-emitting unit to pass through while absorbing other colors of light; when the light-emitting unit 16 is a green light-emitting unit, the light-filtering layer 13 above it can only allow green light emitted by the green light-emitting unit to pass through while absorbing other colors of light.

[0035] In the above design, the filter layer 13 and the second light-shielding layer 11 are used to replace the polarizer in the conventional technology, so as to reduce the thickness of the display panel 1 and facilitate the bending of the display panel 1.

[0036] Of course, in other embodiments, the display panel provided in this application may also include other structures: for example, it may include an anode layer 15 and a cathode layer (not shown), with the anode layer 15 located on the side of the first light-shielding layer 12 facing the substrate layer 10, and the cathode layer located on the side of the first light-shielding layer 12 away from the substrate layer 10. Another example is the inclusion of an encapsulation layer located on the side of the second light-shielding layer 11 away from the substrate layer.

[0037] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of one embodiment of the display device of this application. The display device 2 includes the display panel 1 and optical sensor 3 as described in any of the above embodiments. The position of the optical sensor 3 corresponds to the first ambient light aperture 120. Optionally, as... Figure 3 As shown, the optical sensor 3 is located on the side of the substrate 10 opposite to the first light-shielding layer 12. Alternatively, the optical sensor 3 can be a fingerprint recognition sensor, etc.

[0038] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display panel, characterized in that, include: A substrate layer, a first light-shielding layer, and a reflective layer are stacked sequentially. The first light-shielding layer has multiple first ambient light holes and multiple transmission holes. The reflective layer has second ambient light holes at positions corresponding to the first ambient light holes. The orthographic projection of the transmission holes on the substrate layer at least partially overlaps with the orthographic projection of the reflective layer on the substrate layer. At least one transmission hole is disposed around each first ambient light hole. The first light-shielding layer has multiple first pixel holes, and the first light-shielding layer between at least some adjacent first pixel holes has both a first ambient light hole and a transmission hole. In this process, a first light ray from the outside enters the interior of the display panel through the first ambient light aperture and the second ambient light aperture. At least a portion of the first light ray is reflected inside the display panel to form a second light ray that is away from the substrate layer. At least a portion of the second light ray passes through the through-hole and enters the reflective layer. The reflective layer reflects the second light ray into a third light ray that is directed toward the substrate layer. The substrate layer is a transparent substrate layer.

2. The display panel according to claim 1, characterized in that, The orthographic projection of the through-hole onto the substrate coincides with the orthographic projection of the reflective layer at the corresponding position onto the substrate.

3. The display panel according to claim 1, characterized in that, The first light-shielding layer includes a black pixel definition layer.

4. The display panel according to claim 1, characterized in that, The display panel also includes: A metal wiring layer is stacked between the substrate layer and the first light-shielding layer; wherein, the metal wiring layer has a third ambient light hole at the position corresponding to the first ambient light hole, and at least a portion of the third ambient light hole is surrounded by wiring gaps.

5. The display panel according to claim 4, characterized in that, At least a portion of the wiring gaps are projected onto the substrate layer in the orthographic projection of the through-hole onto the substrate layer.

6. The display panel according to claim 4, characterized in that, The orthogonal projection of the third ambient light aperture on the substrate layer overlaps the orthogonal projection of the first ambient light aperture on the substrate layer.

7. The display panel according to claim 6, characterized in that, The through-hole includes a first boundary adjacent to the first ambient light aperture, and the second boundary of the orthographic projection of the third ambient light aperture on the substrate layer at least partially coincides with the orthographic projection of the first boundary on the substrate layer.

8. The display panel according to claim 1, characterized in that, The display panel also includes: A second light-shielding layer is stacked on the side of the reflective layer facing away from the substrate layer; the second light-shielding layer has a second pixel hole at the position corresponding to the first pixel hole, and a fourth ambient light hole at the position corresponding to the first ambient light hole; A filter layer is applied to fill the second pixel hole.

9. The display panel according to claim 1, characterized in that, The reflective layer is made of metal or metal compound.

10. The display panel according to claim 9, characterized in that, The reflective layer is a touch electrode layer.

11. The display panel according to claim 1, characterized in that, The display panel includes a first display area and a second display area, wherein the light transmittance of the first display area is less than that of the second display area, and the first ambient light hole and the transmission hole are located in the second display area.

12. A display device, characterized in that, The display panel includes any one of claims 1-11 and an optical sensor, wherein the position of the optical sensor corresponds to the first ambient light aperture.

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