Display panel and display device

Abstract

The present application provides a display panel and a display device, wherein the display panel includes a substrate, a light emitting device group, an optical path regulating layer and a target optical film layer, wherein the optical path regulating layer is arranged on a side of the light emitting device group away from the substrate, wherein the optical path regulating layer includes a plurality of second openings located in a first display area and an optical path regulating portion distributed around the second openings, wherein the orthographic projection of the second openings on the pixel definition layer overlaps at least partially with the first openings, and the optical path regulating portion has a side wall facing the second opening, wherein the light emitted by the light emitting unit and reflected and refracted by the target optical film layer adjusts the path via the side wall to avoid the emission of part of the photosensitive area. In the embodiment of the present application, an optical path regulating layer is arranged in the light emitting direction of the light emitting device group, and the area where the optical path regulating portion in the optical path regulating layer is located can cover part of the photosensitive area, so that the side wall of the optical path regulating portion can be used to adjust the light propagation path to avoid part of the photosensitive area and improve the photosensitivity effect of the photosensitive area.

Description

Technical Field

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

[0002] With the development of modern display technology, users' requirements for display devices are gradually increasing. In order to achieve full-screen display in electronic devices, it is often necessary to simultaneously place light-emitting units for display and photosensitive elements for image acquisition in specific areas of the display device. During use, some of the light emitted by the light-emitting units will be refracted and / or reflected inside the display device, affecting the normal operation of the photosensitive elements. Summary of the Invention

[0003] This application provides a display panel and display device that can effectively block light emitted from inside the display panel, thereby solving the problem of light leakage from the bottom bezel of the display panel.

[0004] In a first aspect, embodiments of this application provide a display panel including a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area, the first display area includes a photosensitive area, and the display panel includes a substrate, a light-emitting device group, an optical path control layer, and a target optical film layer.

[0005] The light-emitting device group includes a pixel definition layer disposed on one side of a substrate and a plurality of light-emitting units. The pixel definition layer includes a plurality of first openings, the light-emitting units correspond to the first openings, and the orthogonal projection of the light-emitting units on the pixel definition layer is located in the first openings. Along the light emission direction of the light-emitting units, the photosensitive area does not overlap with the first openings at least partially.

[0006] The light path control layer is disposed on the side of the light-emitting device group away from the substrate. The light path control layer includes a plurality of second openings located in the first display area and light path control parts distributed around the second openings. The orthographic projection of the second openings on the pixel definition layer at least partially overlaps with the first openings. The light path control parts have sidewalls facing the second openings.

[0007] The target optical film layer is disposed on the side of the optical path control layer away from the light-emitting device group.

[0008] Among them, the light emitted by the light-emitting unit and reflected and refracted by the target optical film layer is circumvented by adjusting the path through the side wall to avoid emitting light from part of the photosensitive area.

[0009] Secondly, embodiments of this application provide a display device including a display panel of any of the foregoing embodiments.

[0010] According to an embodiment of this application, a display panel and display device are provided with a light path control layer in the light emission direction of the light-emitting device group. The area where the light path control part in the light path control layer is located can cover part of the photosensitive area, so that the light propagation path can be adjusted by using the sidewall of the light path control part to avoid part of the photosensitive area and improve the light sensitivity of the photosensitive area. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0013] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the B-B' direction;

[0014] Figure 3 yes Figure 2 The diagram shows a schematic of the optical path of a display panel.

[0015] Figure 4 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0016] Figure 5 yes Figure 4 A magnified schematic diagram of area Q in the display panel shown;

[0017] Figure 6 This is a schematic diagram of the structure of an optical path control unit in a display panel provided in an embodiment of this application;

[0018] Figure 7 This is a schematic diagram of the structure of another optical path control unit in the display panel provided in the embodiments of this application;

[0019] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0020] Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0021] Figure 10 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0022] Figure 11 yes Figure 10 A magnified schematic diagram of area P in the display panel shown;

[0023] Figure 12 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0024] Figure 13 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0025] Figure 14 yes Figure 4 A magnified schematic diagram of area R in the display panel shown;

[0026] Figure 15 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0027] Marker explanation:

[0028] 1. Substrate;

[0029] 2. Light-emitting device group; 21. Pixel definition layer; 211. First opening; 22. Light-emitting unit; 221. Red light-emitting unit; 222. Green light-emitting unit; 223. Blue light-emitting unit;

[0030] 3. Optical control layer; 31. Second opening; 32. Optical path control unit; 321. Side wall; 322. Optical path control unit; 323. Unit side wall; 33. First surface;

[0031] 4. Target optical film layer; 41. Cover plate; 42. Display surface;

[0032] 5. Auxiliary control layer; 51. First side;

[0033] 6. Functional film layer;

[0034] 7. Photosensitive element;

[0035] AA1, First display area; AA2, Second display area; PS, Photosensitive area;

[0036] X, the first direction. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0039] In electronic devices such as mobile phones and tablets, it is necessary to integrate photosensitive elements such as front-facing cameras, infrared light sensors, and proximity sensors on one side of the display panel. In some embodiments, a light-transmitting display area can be provided on the aforementioned electronic device, and the photosensitive components can be placed on the back of the light-transmitting display area, thereby achieving a full-screen display of the electronic device while ensuring that the photosensitive elements function properly.

[0040] To achieve full-screen display in electronic devices, a certain number of light-emitting units are often required in the light-transmitting display area to meet its display needs. During display, the light emitted by these units undergoes multiple refractions and / or reflections before returning to the light-transmitting display area, affecting the normal operation of the photosensitive element.

[0041] To address the aforementioned problems, embodiments of the present invention provide a display panel and a display device. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel and the display device.

[0042] This invention provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0043] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. Figure 2 yes Figure 1 A cross-sectional view along the B-B' direction.

[0044] The display panel includes a first display area AA1 and a second display area AA2. The light transmittance of the first display area AA1 is greater than that of the second display area AA2. The first display area AA1 includes a photosensitive area PS.

[0045] According to an embodiment of the present invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, allowing a photosensitive element to be integrated on the back of the first display area AA1, thus achieving under-display integration of a photosensitive component, such as that of a camera. Simultaneously, the first display area AA1 can display an image, increasing the display area of ​​the display panel and enabling a full-screen design for the display device.

[0046] The display panel includes a substrate 1, a light-emitting device group 2, a light control layer 3, and a target optical film layer 4. The light-emitting device group 2 includes a pixel definition layer 21 disposed on one side of the substrate 1 and a plurality of light-emitting units 22. The pixel definition layer 21 includes a plurality of first openings 211, and the light-emitting units 22 correspond to the first openings 211. The orthographic projection of the light-emitting unit 22 on the pixel definition layer 21 is located within the first opening 211. Along the light emission direction of the light-emitting unit 22, the photosensitive area PS does not overlap with the first opening 211 at least partially.

[0047] The substrate 1 can be made of light-transmitting materials such as glass or polyimide (PI). The pixel definition layer 21 is located on one side of the substrate 1 and defines a plurality of first openings 211 within the first display area AA1, and a plurality of light-emitting units 22 are respectively disposed within the plurality of first openings 211.

[0048] The photosensitive area PS is located within the first display area AA1 and has high light transmittance. Therefore, most of the light-transmitting area is located outside the first opening 211, allowing external light incident perpendicularly into the display panel to pass through the photosensitive area PS and enter the photosensitive element, thereby enabling the photosensitive element to sense light. It should be noted that a portion of the photosensitive area PS can overlap with the area where the first opening 211 is located, allowing the photosensitive element to sense a portion of the external light incident obliquely into the display panel.

[0049] Optionally, the light transmittance of the photosensitive area PS is greater than or equal to 15%. To ensure that the light transmittance of the photosensitive area PS is greater than 15%, or even greater than 40%, or even higher, in this embodiment, the light transmittance of each functional film layer of the display panel is greater than 80%, or even at least some functional film layers have a light transmittance greater than 90%.

[0050] An optical path control layer is disposed on the side of the light-emitting device group 2 away from the substrate 1. The optical path control layer includes a plurality of second openings 31 located within the first display area AA1 and optical path control sections 32 distributed around the second openings 31. The orthographic projection of the second openings 31 onto the pixel definition layer 21 at least partially overlaps with the first openings 211. The optical path control sections 32 have sidewalls 321 facing the second openings 31. A target optical film layer 4 is disposed on the side of the optical path control layer away from the light-emitting device group 2. Light emitted from the light-emitting unit 22 and reflected and refracted by the target optical film layer 4 has its path adjusted via the sidewalls 321 to avoid emission from a portion of the photosensitive area PS.

[0051] Please see Figure 2 and Figure 3 The target optical film layer 4 has a display surface 42, which is located on the side of the target optical film layer 4 facing away from the substrate 1. A portion of the light emitted by the light-emitting unit 22 exits from the display surface 42 through refraction, forming a corresponding display image. Another portion of the light returns to the display panel under the combined effects of refraction and reflection. Specifically, the light-emitting unit 22 emits multiple rays with different tilt angles, which reach the display surface 42 after multiple refractions. At this point, because the refractive index of the target optical film layer 4 is different from that of other functional films and the external environmental medium, the light will be refracted on the target optical film layer 4 and partially or completely reflected back into the display panel at the display surface 42, reaching the photosensitive area PS, thus affecting the photosensitivity.

[0052] The light path control layer is located on the side of the light-emitting device group 2 facing away from the substrate 1, that is, in the light-emitting direction of the light-emitting device group 2. The light path control layer includes multiple light path control sections 32 for changing the light propagation path. Specifically, the position of the second opening 31 corresponds to the position of the first opening 211, and the light path control sections 32 are distributed around the second opening 31. Therefore, the area where the light path control sections 32 are located can cover part of the photosensitive area PS. The sidewalls 321 of the light path control sections 32 face the second opening 31 along the first direction X. Part of the light emitted by the light-emitting unit 22 returns to the display panel through reflection and refraction of the target optical film layer 4, and then reaches the sidewalls 321 of the light path control sections 32. The propagation path is adjusted and changed by the refraction or reflection of the sidewalls 321 to avoid part of the photosensitive area PS.

[0053] Please see Figure 4 It is understood that there are other functional film layers 6 between the light-emitting device group 2 and the optical path control layer. Multiple functional film layers 6 are stacked sequentially on the side of the light-emitting device group 2 away from the substrate 1. Different functional film layers 6 play different roles. In addition, other functional film layers can also be provided between the target optical film layer 4 and the optical path control layer. The embodiments of this application do not limit the number and materials of the functional film layers.

[0054] In this embodiment, a light path control layer is provided in the light emission direction of the light-emitting device group 2. The area where the light path control part 32 in the light path control layer is located can cover part of the photosensitive area PS. Thus, the light propagation path can be adjusted by the side wall 321 of the light path control part 32 to avoid part of the photosensitive area PS and improve the photosensitivity of the photosensitive area PS.

[0055] Please see Figure 4 and Figure 5In some embodiments, the display panel further includes an auxiliary control layer 5, which is disposed on the side of the optical path control layer away from the substrate 1 and at least partially covers the second opening 31. The refractive index of the optical path control layer is less than that of the auxiliary control layer 5.

[0056] The auxiliary control layer 5 and the optical path control layer are stacked on top of each other, and the auxiliary control layer 5 at least partially covers the second opening 31. Optionally, some material in the auxiliary control layer 5 fills the second opening 31. The auxiliary control layer 5 plays an auxiliary role in adjusting the light propagation path. The light emitted by the light-emitting unit 22 passes through the second opening 31 to reach the auxiliary control layer 5, then enters the target optical film layer 4 through refraction, and returns to the auxiliary control layer 5 through reflection from the display surface 42. Finally, the light moves to the side wall 321 of the optical path control part 32 and moves through refraction or reflection by the optical path control part 32. During this process, some light will enter the optical path control part 32 from the auxiliary control layer through the side wall 321, such as... Figure 5 As shown, Figure 5 The dashed line in the diagram represents the normal direction of the light reaching the corresponding point in the side wall 321. Since the refractive index of the light path control layer is less than that of the auxiliary control layer 5, the incident angle of the light at the side wall 321 is less than the refraction angle, thus causing the light to avoid part of the photosensitive area PS.

[0057] Please continue reading Figure 4 In some embodiments, the target optical film layer 4 includes a cover plate 41, which is disposed on the side of the auxiliary control layer 5 away from the substrate 1, and the refractive index of the cover plate 41 is less than the refractive index of the auxiliary control layer 5.

[0058] The light emitted by the light-emitting unit 22 is reflected back into the display panel by the cover plate 41. The light reflected by the cover plate 41 first reaches the auxiliary control layer 5. The auxiliary control layer 5 has a first surface 51 facing the cover plate 41. Since the refractive index of the cover plate 41 is less than that of the auxiliary control layer 5, the incident angle of the light at the first surface 51 is greater than the refraction angle. This design can reduce the propagation distance of the light in the first direction X, so that the light can avoid a larger area of ​​the photosensitive area PS.

[0059] Please refer to the following: Figure 4 , Figure 6 and Figure 7 In some embodiments, the optical path control layer has a first surface 33 facing the pixel definition layer 21, and the angle between the sidewall 321 and the first surface 33 is α, where α1≤α≤α2.

[0060] The light emitted by the light-emitting unit 22 will undergo partial or total reflection on the cover plate 41. Generally, the light that undergoes total reflection on the cover plate 41 will have a greater impact on the photosensitive area PS. Specifically, part of the partially reflected light propagates to the outside through refraction, while the other part is reflected back into the display panel. The light that undergoes total reflection is entirely reflected back into the display panel, therefore the intensity of the light that returns to the display panel through total reflection is greater, and its impact on the photosensitive area PS is greater.

[0061] like Figure 6 As shown, when the included angle α is α1, the light rays that reach the sidewall 321 via total internal reflection are emitted along the thickness direction of the optical path control layer under the refraction of the sidewall 321.

[0062] like Figure 7 As shown, when the included angle α is α2, the light rays that reach the sidewall 321 via total internal reflection are emitted along the thickness direction of the optical path control layer under the reflection of the sidewall 321.

[0063] As described above, the area where the optical path control unit 32 is located can cover most of the photosensitive area PS. Therefore, light rays passing through the sidewall 321 and moving along the thickness direction of the optical path control layer can avoid most of the photosensitive area PS. Therefore, in this embodiment, the included angle α is set between α1 and α2, so that light rays that are totally internally reflected by the cover plate 41 can gradually approach the area where the light-emitting unit 22 is located in the first direction X through refraction or reflection by the sidewall 321, thereby avoiding most of the photosensitive area PS and reducing the impact of the light emitted by the light-emitting unit 22 on the photosensitive effect of the photosensitive area PS.

[0064] Specifically, please refer to Figure 4 and Figure 6 When the included angle α is α1, the following conditions must be met simultaneously:

[0065] sin(α1-β)*n2=sinα1*n1;

[0066] sinβ*n2=1.

[0067] The result is obtained by integrating two formulas:

[0068]

[0069] Wherein, n1 represents the refractive index of the optical path control layer, n2 represents the refractive index of the auxiliary control layer 5, and β represents the angle of refraction of the light rays that are totally internally reflected by the cover plate 41 and enter the auxiliary control layer 5 from the cover plate 41.

[0070] Please refer to Figure 4 and Figure 7 When the included angle α is α2, the following conditions must be met simultaneously:

[0071] sin(α2-β)*n2=n1;

[0072] sinβ*n2=1.

[0073] The result is obtained by integrating two formulas:

[0074]

[0075] Please see Figure 8 and Figure 9 In some embodiments, the minimum distance D between the sidewall 321 of the second opening 31 and the corresponding light-emitting unit 22 in the first direction X is denoted as D. The sidewall 321 is sloped and forms an angle α with the first surface 33. Therefore, the distance between the sidewall 321 and the corresponding light-emitting unit 22 in the first direction X continuously changes along the light emission direction of the light-emitting unit 22. The minimum distance between the sidewall 321 of the second opening 31 and the corresponding light-emitting unit 22 in the first direction X refers to the distance between the endpoint of the sidewall 321 closest to the light-emitting unit 22 and the edge of the first opening 211 corresponding to the light-emitting unit 22 along the first direction X. It can be understood that the edge of the first opening 211 can be sloped. In this case, the minimum distance between the sidewall 321 of the second opening 31 and the corresponding light-emitting unit 22 in the first direction X refers to the distance between the endpoint of the sidewall 321 closest to the light-emitting unit 22 and the endpoint of the edge of the first opening 211 closest to the sidewall 321 along the first direction X.

[0076] In this embodiment, when the included angle α is less than 90°, the minimum distance between the sidewall 321 and the corresponding light-emitting unit 22 in the first direction X is the distance between the endpoint of the sidewall 321 that contacts the first surface 33 and the edge of the corresponding first opening 211 in the first direction X. When the included angle α is greater than 90°, the minimum distance between the sidewall 321 and the corresponding light-emitting unit 22 in the first direction X is the distance between the endpoint of the sidewall 321 that is away from the first surface 33 and the edge of the corresponding first opening 211 in the first direction X.

[0077] Optionally, D1≤D≤D2; such as Figure 8 As shown, when the distance D is D1, the light emitted by the end of the light-emitting unit 22 away from the sidewall 321 in the first direction X reaches the sidewall 321 via total internal reflection from the cover plate 41; Figure 9 As shown, when the distance D is D2, the light emitted by the light-emitting unit 22 at the end near the sidewall 321 in the first direction X reaches the sidewall 321 via total internal reflection from the cover plate 41.

[0078]

[0079]

[0080] α represents the angle between the sidewall 321 and the first surface 33, θ c n represents the critical angle for total internal reflection of cover plate 41. c T represents the refractive index of cover plate 41, T1 represents the thickness of optical path control layer, T2 represents the thickness of auxiliary control layer 5, and W represents the length of light-emitting unit 22 in the first direction X; T i This represents the thickness of the different film layers that the light emitted from the light-emitting unit 22 passes through during its journey to the cover plate 41; n i T represents the refractive index of the different film layers that the light emitted from the light-emitting unit 22 passes through during its journey to the cover plate 41; j This indicates the corresponding thickness of the different film layers that light passes through during total internal reflection after passing through cover plate 41 to reach auxiliary control layer 5; n j This indicates the refractive index of the different films that light passes through during the process of total internal reflection after passing through the cover plate 41 and reaching the auxiliary control layer 5.

[0081] Specifically, in the formula L1 represents the distance the light emitted from the light-emitting unit 22 travels in the first direction X during its journey to the cover plate 41. In the formula... L2 represents the distance the light travels in the first direction X during its journey from total internal reflection via cover plate 41 to auxiliary control layer 5. (T2-T1)tan(sin -1 (n c *sinθ c / n2)) is L3, representing the distance the light travels in the first direction X during its movement from the auxiliary control layer 5 to the sidewall 321. T1 / tanα in the formula represents the length of the sidewall 321 in one direction.

[0082] It should be noted that the letter 'm' in the formula represents the number of film layers above the light-emitting unit 22 in the display panel, and this application does not limit this number. The letter 'q' represents the number of film layers above the auxiliary control layer 5 in the display panel, and this application does not limit this number.

[0083] According to the embodiment of this application, the minimum distance between the side wall 321 and the corresponding light-emitting unit 22 in the first direction X is flexibly adjusted based on the film layer structure in the display panel, so that the light emitted by the light-emitting unit 22 and after total reflection by the cover plate 41 can accurately reach the position of the side wall 321, which meets the actual use needs.

[0084] In some embodiments, the included angle α between the sidewall 321 and the first surface 33 is in the range of 80°≤α≤100°; the minimum distance D between the sidewall 321 of the second opening 31 and the corresponding light-emitting unit 22 in the first direction X is in the range of 0≤α≤17μm.

[0085] This embodiment controls the angle between the sidewall 321 and the first surface 33, as well as the minimum distance between the sidewall 321 and the corresponding light-emitting unit 22 in the first direction X, so that the light emitted by the light-emitting unit 22 can reach the sidewall 321 of the light path control unit 32 through the refraction of other film layers and the total internal reflection of the cover plate 41. The light path control unit 32 changes the propagation path of the light by refraction or reflection, thereby avoiding part of the photosensitive area PS and improving the photosensitivity.

[0086] Please see Figure 10 and Figure 11 In some embodiments, along the first direction X, the minimum distance between the light-emitting unit 22 and the sidewall 321 of the corresponding second opening 31 increases as the length of the light-emitting unit 22 in the first direction X increases.

[0087] The light-emitting unit 22 may include a red light-emitting unit 221, a green light-emitting unit 222, and a blue light-emitting unit 223, etc. The different colored light-emitting units 22 have different sizes, that is, different lengths in the first direction X. Optionally, the length of the blue light-emitting unit 223 in the first direction X is greater than the length of the green light-emitting unit 222 in the first direction X, and the length of the green light-emitting unit 222 in the first direction X is greater than the length of the red light-emitting unit 221 in the first direction X. In this case, the distance D corresponding to the blue light-emitting unit 223 is greater than the distance D corresponding to the green light-emitting unit 222; the distance D corresponding to the green light-emitting unit 222 is greater than the distance D corresponding to the red light-emitting unit 221.

[0088] The light emitted by the light-emitting unit 22 is not emitted perpendicularly along the thickness direction of the display panel; most of the light exits the display panel at a certain angle. Therefore, if the distance between the light-emitting unit 22 and the light path control unit 32 in the first direction X is too close, the light path control unit 32 will affect the display effect of the display panel. In this embodiment, the distance D is set to increase with the length of the light-emitting unit 22 in the first direction X, allowing the distance between the light path control unit 32 and the light-emitting unit 22 in the first direction X to be adaptively adjusted according to the length of different light-emitting units 22. This improves the light sensitivity of the display panel while ensuring a good display effect.

[0089] It should be noted that the color type, quantity, and size of the light-emitting units 22 can be adjusted according to the design requirements of the display panel, and are therefore not limited to the examples in the above embodiments. Furthermore, the arrangement of light-emitting units 22 of different colors is not limited to the examples in the above embodiments.

[0090] Please see Figure 12 In some embodiments, along the first direction X, at least a portion of the photosensitive area PS is at least at a distance from the adjacent light-emitting unit 22 that is not less than the minimum distance between the light-emitting unit 22 and the sidewall 321 of the corresponding second opening 31.

[0091] As described above, by adjusting the angle between the sidewall 321 and the first surface 33, light rays reaching the sidewall 321 via total internal reflection from the cover plate 41 can gradually approach the area where the light-emitting unit 22 is located in the first direction X under the refraction or reflection of the sidewall 321. Therefore, in this embodiment, the distance between at least a portion of the photosensitive area PS and the adjacent light-emitting unit 22 is set to be no less than a distance D, so that at least a portion of the photosensitive area PS can avoid being affected by the light emitted by the light-emitting unit 22 and undergoing total internal reflection from the cover plate 41, thereby reducing the light interference experienced by the photosensitive area PS and further improving the light sensitivity of the display panel.

[0092] Please see Figure 13 In some embodiments, the optical path control unit 32 includes at least two optical path control units 322 nested sequentially around the second opening 31. Each optical path control unit 322 has a unit sidewall 323 facing the second opening 31 along a first direction X. The angle between the unit sidewall 323 and the first surface 33 is α', wherein the angle α' is different for different optical path control units 322.

[0093] In this embodiment, the light path control unit 32 is composed of multiple light path control units 322, which are nested around each other and surround the outer periphery of the second opening 31. Each light path control unit 322 has a unit sidewall 323, and each unit sidewall 323 can reflect and / or refract the light emitted by the light-emitting unit 22. The distance between the unit sidewall 323 and the light-emitting unit 22 in the first direction X is different for different light path control units 322. Therefore, the tilt angle of the light reflected from the cover plate 41 to different unit sidewalls 323 is different. This application changes the angle between different unit sidewalls 323 and the first surface 33 according to the different distances between the unit sidewalls 323 and the light-emitting unit 22 in the first direction X, so that the light path control unit 322 can better adjust the light propagation path and improve the light sensitivity of the display panel.

[0094] In some embodiments, in the first direction X, the minimum distance between the unit sidewall 323 and the corresponding light-emitting unit 22 in the first direction X is D', and the included angle α' and distance D' corresponding to any optical path control unit 322 satisfy the following:

[0095]

[0096]

[0097] n1 represents the refractive index of the optical path control layer, n2 represents the refractive index of the auxiliary control layer 5, and θ c n represents the critical angle for total internal reflection of cover plate 41. c T represents the refractive index of cover plate 41, T1 represents the thickness of optical path control layer, T2 represents the thickness of auxiliary control layer 5, and W represents the length of light-emitting unit 22 in the first direction X; T i This represents the thickness of the different film layers that the light emitted from the light-emitting unit 22 passes through during its journey to the cover plate 41; n i T represents the refractive index of the different film layers that the light emitted from the light-emitting unit 22 passes through during its journey to the cover plate 41; j This indicates the corresponding thickness of the different film layers that light passes through during total internal reflection after passing through cover plate 41 to reach auxiliary control layer 5; n j This indicates the refractive index of the different films that light passes through during the process of total internal reflection after passing through the cover plate 41 and reaching the auxiliary control layer 5.

[0098] For the derivation process of the included angle α' and distance D' corresponding to the optical path control unit 322, please refer to the derivation process of the included angle α and distance D in the previous embodiment. It will not be repeated in the embodiment of this application.

[0099] Please see Figure 14 In some embodiments, the distance between adjacent light-emitting units 22 in the first display area AA1 in the first direction X is greater than the distance between adjacent light-emitting units 22 in the second display area AA2 in the first direction X.

[0100] To improve the light transmittance of the first display area AA1, the pixel density (Pixels Per Inch, PPI) in the first display area AA1 needs to be reduced so that its PPI is lower than that of the second display area AA2. In this embodiment, the distance between adjacent light-emitting units 22 in the first display area AA1 in the first direction X is increased, thereby reducing the PPI of the first display area AA1. This makes it easier for external light to enter the first display area AA1, thus improving the light sensitivity of the display panel.

[0101] On the other hand, please see Figure 15This application provides a display device, including the display panel in any of the foregoing embodiments. It is understood that the display device provided in this embodiment has the beneficial effects of the display panel provided in the embodiments of this invention. For details, please refer to the specific descriptions of the display panel in the foregoing embodiments; these descriptions will not be repeated here.

[0102] In some embodiments, the display device further includes a photosensitive element 7, which is located in the first display area AA1 and disposed on the side of the substrate 1 opposite to the light-emitting device group 2. The photosensitive element 7 receives ambient light through the photosensitive area PS. Optionally, the photosensitive element 7 may be an image acquisition device for acquiring external image information. In other embodiments, the photosensitive element 7 may also be a light sensor such as an infrared sensor, a proximity sensor, an infrared lens, a flood illuminator, an ambient light sensor, or a dot projector.

[0103] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0104] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A display panel, characterized in that: The display panel comprises a first display area and a second display area, the light transmittance of the first display area is greater than the light transmittance of the second display area, the first display area comprises a photosensitive area, and the display panel comprises: substrate; A light-emitting device group, comprising a pixel definition layer and a plurality of light-emitting units arranged on one side of the substrate, wherein the pixel definition layer comprises a plurality of first openings, the light-emitting units correspond to the first openings, and the orthographic projections of the light-emitting units on the pixel definition layer are located in the first openings, and along the light-emitting direction of the light-emitting units, the photosensitive areas at least partially do not overlap with the first openings; an optical path regulating layer, arranged on a side of the light emitting device group away from the substrate, the optical path regulating layer comprising a plurality of second openings located in the first display area and optical path regulating portions distributed around the second openings, the orthographic projections of the second openings on the pixel definition layer at least partially overlapping with the first openings, and the optical path regulating portions having side walls facing the second openings; A target optical film layer is arranged on a side of the light path regulating layer away from the light emitting device group; Wherein, the light emitted by the light emitting unit and reflected and refracted by the target optical film layer adjusts its path through the refraction or reflection of the side wall to avoid emitting from part of the photosensitive area.

2. The display panel according to claim 1, characterized in that: It also includes an auxiliary regulating layer, which is arranged on a side of the light path regulating layer away from the substrate and at least partially covers the second opening, and the refractive index of the light path regulating layer is smaller than the refractive index of the auxiliary regulating layer.

3. The display panel according to claim 2, characterized in that: The target optical film layer includes a cover plate, which is arranged on a side of the auxiliary regulating layer away from the substrate, and a refractive index of the cover plate is smaller than a refractive index of the auxiliary regulating layer.

4. The display panel according to claim 3, characterized in that: The light path regulating layer has a first surface facing the pixel definition layer, and the angle between the side wall and the first surface is α, wherein α1≤α≤α2; When the angle α is α1, the light reaching the side wall through total reflection of the cover plate is emitted along the thickness direction of the light path regulating layer under the refraction of the side wall to avoid part of the photosensitive area; When the angle α is α2, the light reaching the side wall through total reflection of the cover plate is emitted along the thickness direction of the light path regulating layer under the reflection effect of the side wall to avoid part of the photosensitive area; wherein, n1 represents the refractive index of the optical path regulating layer, and n2 represents the refractive index of the auxiliary regulating layer.

5. The display panel according to claim 4, characterized in that: The side wall faces the second opening along the first direction, and the minimum distance between the side wall of the second opening and the corresponding light emitting unit in the first direction is D, wherein D1≤D≤D2; When the distance D is set to D1, the light emitted from the end of the light emitting unit away from the side wall in the first direction reaches the side wall through total reflection of the cover plate; When the distance D is set to D2, the light emitted by the end of the light emitting unit close to the side wall in the first direction reaches the side wall through total reflection of the cover plate; wherein, α represents the angle between the side wall and the first surface, θ c represents the critical angle of total reflection of the cover plate, n c represents the refractive index of the cover plate, T1 represents the thickness of the light path regulating layer, T2 represents the thickness of the auxiliary regulating layer, and W represents the length of the light emitting unit in the first direction; i It is represented by the corresponding thickness of different film layers that the light from the light emitting unit passes through when reaching the cover plate; n i It is represented by the corresponding refractive index of different film layers that the light from the light emitting unit passes through when it reaches the cover plate; T j represents the corresponding thickness of different film layers that the light passes through when it reaches the auxiliary regulating layer after being totally reflected by the cover plate; n j It indicates the corresponding refractive index of different film layers that the light passes through when it reaches the auxiliary regulating layer after being totally reflected by the cover plate.

6. The display panel according to claim 5, characterized in that: The range of the angle α between the side wall and the first surface is: 80°≤α≤100°; A range of a minimum distance D between the side wall of the second opening and the corresponding light emitting unit in the first direction is: 0≤α≤17 μm.

7. The display panel according to claim 5, characterized in that: Along the first direction, a minimum distance between the light emitting unit and the corresponding side wall of the second opening increases as the length of the light emitting unit in the first direction increases.

8. The display panel according to claim 5, characterized in that: Along the first direction, a distance between at least a portion of the photosensitive area and an adjacent light emitting unit is not less than a minimum distance between the light emitting unit and the corresponding side wall of the second opening.

9. The display panel according to claim 3, characterized in that: The light path regulating portion comprises at least two light path regulating units nested in sequence around the second opening, and the light path regulating unit has a unit side wall facing the second opening along a first direction; The light path regulating layer has a first surface facing the pixel definition layer, and the angle between the first surface and the unit side wall is α', wherein different light path regulating units correspond to different angles α'.

10. The display panel according to claim 9, characterized in that: In the first direction, the minimum distance between the unit side wall and the corresponding light-emitting unit in the first direction is D' The angle α' and the distance D' corresponding to any of the optical path control units satisfy: n1 represents the refractive index of the optical path regulating layer, n2 represents the refractive index of the auxiliary regulating layer, θ c represents the critical angle of total reflection of the cover plate, n c represents the refractive index of the cover plate, T1 represents the thickness of the light path regulating layer, T2 represents the thickness of the auxiliary regulating layer, and W represents the length of the light emitting unit in the first direction; i It is represented by the corresponding thickness of different film layers that the light from the light emitting unit passes through when reaching the cover plate; n i It is represented by the corresponding refractive index of different film layers that the light from the light emitting unit passes through when it reaches the cover plate; T j represents the corresponding thickness of different film layers that the light passes through when it reaches the auxiliary regulating layer after being totally reflected by the cover plate; n j It indicates the corresponding refractive index of different film layers that the light passes through when it reaches the auxiliary regulating layer after being totally reflected by the cover plate.

11. The display panel according to claim 1, characterized in that: The distance between adjacent light emitting units in the first display area in the first direction is greater than the distance between adjacent light emitting units in the second display area in the first direction. Wherein, the side wall faces the second opening along the first direction.

12. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 11.

13. The display device according to claim 12, characterized in that: It also includes a photosensitive element, which is located in the first display area and is arranged on a side of the substrate away from the light-emitting device group. The photosensitive element receives external light through the photosensitive area.

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