Display panel

Abstract

The invention provides a display panel. The display panel comprises a substrate, and a first isolation structure, a plurality of photosensitive devices and a plurality of light-emitting devices which are located on the substrate. The photosensitive devices and the light-emitting devices are located on the same side of the substrate, first orthographic projections of part of the light-emitting devices on the substrate surround second orthographic projections of the corresponding photosensitive devices on the substrate, and the first isolation structure comprises isolation units corresponding to the photosensitive devices respectively; the isolation unit is located between the light-emitting device corresponding to the first orthographic projection surrounding the second orthographic projection and the corresponding photosensitive device. The photosensitive device is located in the light-emitting device, so that more light rays emitted by the light-emitting device can be received, and the sensitivity and the accuracy of optical recognition are improved. In addition, an isolation unit is arranged between the photosensitive device and the peripheral light-emitting devices to shield transverse crosstalk light, so that the signal-to-noise ratio of optical identification of the photosensitive device is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular, to a display panel. Background Art

[0002] Under-screen fingerprint recognition technology has been widely used in display panels of electronic products. In the application of under-screen fingerprint recognition, photosensitive devices such as organic photodiodes (OPD) can receive light reflected from the finger to form an image to achieve fingerprint recognition. However, the current display panel is limited by its own structural design, and the signal-to-noise ratio of fingerprint recognition is difficult to further improve. Summary of the invention

[0003] In a first aspect, the present disclosure provides a display panel, which includes a substrate and a first isolation structure located on the substrate, a plurality of photosensitive devices and a plurality of light-emitting devices. The photosensitive devices and the light-emitting devices are located on the same side of the substrate, the first orthographic projections of some of the light-emitting devices on the substrate surround the second orthographic projections of the corresponding photosensitive devices on the substrate, the first isolation structure includes isolation units corresponding to the photosensitive devices, and the isolation units are located between the light-emitting devices corresponding to the first orthographic projection surrounding the second orthographic projection and the corresponding photosensitive devices.

[0004] In the above scheme, the photosensitive device is located inside the light-emitting device, so that it can receive more light emitted by the light-emitting device to improve the sensitivity and accuracy of optical recognition; in addition, an isolation unit is set between the photosensitive device and the surrounding light-emitting devices to block the lateral crosstalk light, thereby improving the signal-to-noise ratio of optical recognition of the photosensitive device.

[0005] In a specific embodiment of the first aspect of the present disclosure, the plurality of light-emitting devices include a first type of light-emitting device, a second type of light-emitting device, and a third type of light-emitting device, the wavelengths of the emitted light of the first type of light-emitting device, the second type of light-emitting device, and the third type of light-emitting device decrease in sequence, and the second type of light-emitting device surrounds the photosensitive device. The light intensity of the second type of light-emitting device accounts for the highest proportion, and the second type of light-emitting device surrounds the photosensitive device to provide light for fingerprint recognition, which can improve the signal-to-noise ratio of optical recognition of the photosensitive device.

[0006] Optionally, the outer edges of the first orthographic projection of the second type light-emitting device on the substrate, the orthographic projection of the isolation unit on the substrate and the second orthographic projection of the photosensitive device on the substrate are similar in shape and are arranged in concentric rings.

[0007] Optionally, the first type of light emitting device, the second type of light emitting device and the third type of light emitting device emit red light, green light and blue light in sequence.

[0008] In a specific embodiment of the first aspect of the present disclosure, the light-emitting device includes a first electrode, a first light-emitting functional layer, and a second electrode stacked in sequence on a substrate, and the photosensitive device includes a third electrode, a second photosensitive functional layer, and a third electrode stacked in sequence on the substrate, the first electrode and the third electrode are in the same layer and are provided with the same material, and the second electrode and the fourth electrode are in the same layer and are provided with the same material. In this way, the light-emitting device and the photosensitive device can be prepared synchronously to simplify the preparation process of the display panel.

[0009] Optionally, the light emitting device and the photosensitive device are configured such that when driven: the potential of the first electrode is higher than the potential of the second electrode, and the potential of the third electrode is lower than the potential of the fourth electrode.

[0010] Optionally, a first orthographic projection of the first electrode of the second type light-emitting device on the substrate is a ring, and is spaced apart from the third electrode.

[0011] In a specific implementation of the first aspect of the present disclosure, the isolation unit is an insulating structure.

[0012] Optionally, the isolation unit of the first isolation structure includes an inorganic film layer; and / or, the isolation unit of the first isolation structure includes an organic film layer. For example, further, the organic film layer is a black optical adhesive layer.

[0013] Optionally, the display panel further includes a pixel defining layer, which is located between the isolation unit and the substrate and includes a plurality of pixel openings, and the light emitting device and the photosensitive device are located in the pixel openings.

[0014] Optionally, the pixel defining layer is an organic film layer.

[0015] In another specific embodiment of the first aspect of the present disclosure, the isolation unit includes a first support portion and a first crown portion, the first support portion is located between the substrate and the first crown portion, the first support portion and the first crown portion limit the first isolation opening, the first isolation opening limits the photosensitive device, the orthographic projection of one end of the first support portion facing the first crown portion on the substrate is located within the orthographic projection of the first crown portion on the substrate, the first support portion is a conductive structure, and the second electrode and the fourth electrode are connected to the side surface of the first support portion.

[0016] In the above scheme, the fourth electrode of the photosensitive device can be electrically connected to the second electrodes of other light-emitting devices through an isolation unit to form a common electrode, thereby simplifying the circuit structure of the display panel and reducing the voltage drop when driving the second electrode and the fourth electrode.

[0017] Optionally, at least two isolation units are arranged between the second type of light emitting device and the photosensitive device, and the at least two isolation units are spaced from each other and arranged in a concentric ring around the photosensitive device. In this way, the second type of light emitting device and the photosensitive device can be prepared separately based on the isolation units to avoid mutual interference between the processes for preparing the second type of light emitting device and the photosensitive device.

[0018] Optionally, the orthographic projection of the first support portion on the substrate is within the orthographic projection of the first crown portion on the substrate. In this way, the isolation unit can enhance the isolation effect on the first light-emitting functional layer of the second type of light-emitting device and the second photosensitive functional layer of the photosensitive device, so as to eliminate the current crosstalk problem between the second type of light-emitting device and the photosensitive device.

[0019] Optionally, the isolation unit further includes a first bottom portion, the first bottom portion is located between the substrate and the first supporting portion, the orthographic projection of one end of the first supporting portion facing the first bottom portion on the substrate is located within the orthographic projection of the first bottom portion on the substrate, the first bottom portion is a conductive structure, and the second electrode and the fourth electrode are connected to the area of ​​the surface of the first bottom portion that is away from the substrate and is not covered by the first supporting portion. The second electrode and the fourth electrode are more easily deposited on the surface of the first bottom portion relative to the side wall of the first supporting portion, so that the thickness and area of ​​the contact portion between the second electrode and the fourth electrode and the isolation unit can be increased to reduce the impedance between the second electrode and the fourth electrode and the isolation unit.

[0020] Optionally, the orthographic projection of the first supporting portion on the substrate is located within the orthographic projection of the first bottom portion on the substrate.

[0021] Optionally, the materials of the first bottom portion, the first support portion and the first crown portion are titanium, aluminum and titanium in sequence; or, the materials of the first bottom portion, the first support portion and the first crown portion are molybdenum, aluminum and titanium in sequence.

[0022] In a specific embodiment of the first aspect of the present disclosure, the display panel further includes a pixel defining layer, which is located between the isolation unit and the substrate and includes a plurality of pixel openings, and the light-emitting device and the photosensitive device are located in the pixel openings.

[0023] Optionally, the pixel defining layer is an inorganic film layer.

[0024] In a specific embodiment of the first aspect of the present disclosure, the display panel may further include a second isolation structure, the second isolation structure is located on the substrate and is a grid structure to have a plurality of second isolation openings, the first type of light emitting device and the third type of light emitting device are located in the second isolation openings. The second isolation structure and the adjacent first isolation structure define a third isolation opening, and the second type of light emitting device is located in the third isolation opening.

[0025] In the embodiments of the present disclosure, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices can be prepared separately through the first isolation structure and the second isolation structure. Not only can the thickness of each film layer of the first light-emitting functional layer of each light-emitting device be controlled to improve the microcavity effect of the light-emitting device and thus improve the brightness of the display panel, but the formation position of the film layer of each light-emitting device can also be controlled. In the process of preparing these film layers, a mask plate is not required, and thus there is no need to consider the position accuracy, which reduces the gap between each light-emitting device, thereby improving the pixel density PPI of the display panel. In addition, the first isolation structure and the second isolation structure can be used to connect the second electrodes of each light-emitting device while isolating the first light-emitting functional layer of each light-emitting device, thereby solving the current crosstalk problem between each light-emitting device.

[0026] Optionally, the second isolation structure is in the same layer and made of the same material as the first isolation structure. In this way, the first isolation structure and the second isolation structure can be manufactured simultaneously, thereby simplifying the manufacturing process of the display panel.

[0027] In a specific embodiment of the first aspect of the present disclosure, the display panel may further include a color filter layer, which is located on a side of the photosensitive device away from the substrate and includes color filter units corresponding to the photosensitive devices. The color of the color filter unit is the same as the light emission color of the second type of light-emitting device, the orthographic projection of the color filter unit on the substrate is located within the orthographic projection of the second type of light-emitting device on the substrate, the orthographic projection of the color filter unit on the substrate coincides with the second orthographic projection of the corresponding photosensitive device on the substrate, or the second orthographic projection of the photosensitive device on the substrate is located within the orthographic projection of the corresponding color filter unit on the substrate.

[0028] Optionally, the display panel includes a packaging structure covering the light emitting device and the photosensitive device, and the packaging structure includes a first packaging layer, a second packaging layer, and a third packaging layer stacked in sequence on a side of the light emitting device and the photosensitive device away from the substrate. The color filter layer is located between the first packaging layer and the second packaging layer; or, the color filter layer is located between the second packaging layer and the third packaging layer; or, the color filter layer is located on a side of the third packaging layer away from the substrate.

[0029] In a specific embodiment of the first aspect of the present disclosure, the display panel may further include a packaging structure covering the light emitting device and the photosensitive device, the packaging structure including a first packaging layer, a second packaging layer and a third packaging layer stacked in sequence on the side of the light emitting device and the photosensitive device away from the substrate. The first packaging layer, the second packaging layer and the third packaging layer are an inorganic film layer, an organic film layer and an inorganic film layer in sequence; or, the first packaging layer, the second packaging layer and the third packaging layer are all inorganic film layers, and the refractive index of the third packaging layer is greater than the refractive index of the first packaging layer and the second packaging layer, so that the emission rate of the light emitted by the light emitting device from the display panel can be increased, and the probability of the light being reflected inside the display panel and causing lateral crosstalk is correspondingly reduced, and the incidence rate of the light emitted through the light emitting device and reflected by the fingerprint is increased, thereby improving the signal-to-noise ratio of the photosensitive device.

[0030] Optionally, the display panel further includes a lens structure located on a side of the packaging structure away from the substrate, the lens structure includes a first dielectric portion and a second dielectric portion, the refractive index of the first dielectric portion is less than the refractive index of the second dielectric portion, the orthographic projection of the first dielectric portion on the substrate is located within the gap between adjacent light-emitting devices and the gap between the second type of light-emitting devices and the photosensitive device on the substrate, and the orthographic projection of the light-emitting device and the photosensitive device on the substrate is located within the orthographic projection of the second dielectric portion on the substrate. By providing the lens structure, the light emitted by the light-emitting device can be totally reflected at the interface between the first dielectric portion and the second dielectric portion, thereby reducing the generation of lateral crosstalk light and improving the signal-to-noise ratio of the photosensitive device.

[0031] In a specific embodiment of the first aspect of the present disclosure, each adjacent first-type light-emitting device, second-type light-emitting device, and third-type light-emitting device constitutes a pixel, and in each pixel, the ratio of the number of first-type light-emitting devices, second-type light-emitting devices, third-type light-emitting devices, and photosensitive devices is 1:1:1:1:1:1.

[0032] In a specific embodiment of the first aspect of the present disclosure, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged in multiple rows and multiple columns. In each column, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged periodically in sequence, and the light-emitting devices in adjacent columns are arranged alternately so that two light-emitting devices located in adjacent columns and adjacent to each other are located in adjacent rows, respectively, wherein each first type of light-emitting device is adjacent to three second type of light-emitting devices and three third type of light-emitting devices, each second type of light-emitting device is adjacent to three first type of light-emitting devices and three third type of light-emitting devices, and each third type of light-emitting device is adjacent to three first type of light-emitting devices and three second type of light-emitting devices.

[0033] In another specific embodiment of the first aspect of the present disclosure, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged in multiple rows and columns, the first type of light-emitting devices and the third type of light-emitting devices are arranged in the same column and alternately arranged in the column, the column where the first type of light-emitting devices and the third type of light-emitting devices are located is different from the column where the second type of light-emitting devices are located, the column where the first type of light-emitting devices and the third type of light-emitting devices are located is alternately arranged with the column where the second type of light-emitting devices are located, and every two adjacent first type of light-emitting devices and third type of light-emitting devices in the same column are in the same row with one second type of light-emitting device in the adjacent column.

[0034] Optionally, in the column where the second type light emitting devices are located, every two second type light emitting devices form a group, and the distance between the two second type light emitting devices in the same group is smaller than the distance between the second type light emitting devices in different groups. In this way, the photosensitive device can more easily receive the light emitted by the two second type light emitting devices, thereby improving the signal-to-noise ratio of the photosensitive device.

[0035] In another specific embodiment of the first aspect of the present disclosure, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged in multiple rows and columns, the columns where the first type of light-emitting devices are located, the columns where the second type of light-emitting devices are located and the columns where the third type of light-emitting devices are located are all different, and in each row, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged periodically in sequence.

[0036] A second aspect of the present disclosure provides a display device, which is a display panel in any implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a planar structure of a display panel provided by an embodiment of the present disclosure.

[0038] Figure 2 for Figure 1 The shown figure shows an enlarged view of the S1 region of the display panel under design.

[0039] Figure 3 for Figure 2 The display panel is shown in a cross-sectional view along line M1 - N1 .

[0040] Figure 4 for Figure 1 The shown figure is an enlarged view of the S1 region of the display panel under another design.

[0041] Figure 5A for Figure 4 The shown display panel is a cross-sectional view along M2 - N2 under the first design.

[0042] Figure 5B for Figure 4The shown display panel is a cross-sectional view along M3-N3 under the first design.

[0043] Figure 5C for Figure 4 The shown display panel is a cross-sectional view along M2 - N2 under the second design.

[0044] Fig. 6A for Figure 4 The shown cross-sectional view is taken along M2 - N2 of the display panel under the third design.

[0045] Figure 6B for Figure 4 The shown cross-section is along M3 - N3 of the display panel under the third design.

[0046] Fig. 7A for Figure 4 The shown display panel is a cross-sectional view along M2 - N2 under the fourth design.

[0047] Figure 7B for Figure 4 The shown display panel is a cross-sectional view along M3-N3 under the fourth design.

[0048] Figure 8 A cross-sectional view of a partial area of ​​a display panel provided in another design according to an embodiment of the present disclosure.

[0049] Fig. 9 A cross-sectional view of a partial area of ​​a display panel provided in another design according to an embodiment of the present disclosure.

[0050] Fig.10 A cross-sectional view of a partial area of ​​a display panel provided in another design according to an embodiment of the present disclosure.

[0051] Fig.11 A schematic diagram of a pixel arrangement of a display panel under a certain design according to an embodiment of the present disclosure.

[0052] Fig.12 A schematic diagram of another pixel arrangement of a display panel provided in an embodiment of the present disclosure.

[0053] Fig.13 A schematic diagram of another pixel arrangement of a display panel provided in an embodiment of the present disclosure.

[0054] Description of reference numerals:

[0055] 100-substrate; 101-display area; 102-non-display area;

[0056] 210-light-emitting device; 211-first electrode; 212-first light-emitting functional layer; 213-second electrode; 210A-first type of light-emitting device; 210B-second type of light-emitting device; 210C-third type of light-emitting device;

[0057] 220 - photosensitive device; 221 - third electrode; 222 - second photosensitive functional layer; 223 - fourth electrode;

[0058] 310-first isolation structure; 311-first support portion; 312-first crown portion; 313-first bottom portion; 320-second isolation structure; 321-second support portion; 322-second crown portion; 323-second bottom portion; 301-first isolation opening; 302-second isolation opening; 303-third isolation opening;

[0059] 400-pixel definition layer; 401-pixel opening;

[0060] 500-color film layer; 510-color film unit;

[0061] 600-packaging structure; 610-first packaging layer; 620-second packaging layer; 630-third packaging layer;

[0062] 700 - lens structure; 710 - first dielectric portion; 720 - second dielectric portion. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0064] A photosensitive device can be set in the display panel to have a fingerprint recognition function. The photosensitive device uses the light emitted by the display panel and reflected by the fingerprint to perform fingerprint recognition. However, some of the light generated by the display panel may be reflected internally and become lateral crosstalk light. If this light is captured by the photosensitive device, it will become interference light, causing the photosensitive device to generate noise, thereby reducing the signal-to-noise ratio of the photosensitive device.

[0065] The embodiments of the present disclosure provide a display panel and a display device to at least solve the above technical problems. The display panel includes a substrate and a first isolation structure located on the substrate, a plurality of photosensitive devices and a plurality of light-emitting devices. The photosensitive device and the light-emitting device are located on the same side of the substrate, the first orthographic projection of some of the light-emitting devices on the substrate surrounds the second orthographic projection of the corresponding photosensitive device on the substrate, the first isolation structure includes isolation units corresponding to the photosensitive devices, and the isolation units are located between the light-emitting device corresponding to the first orthographic projection surrounding the second orthographic projection and the corresponding photosensitive device. In the display panel, the photosensitive device is located inside the light-emitting device, so that more light emitted by the light-emitting device can be received to improve the sensitivity and accuracy of optical recognition; in addition, an isolation unit is provided between the photosensitive device and the surrounding light-emitting devices to block the light of lateral crosstalk, so as to improve the signal-to-noise ratio of optical recognition of the photosensitive device.

[0066] The structure of the display panel and the display device in at least one embodiment of the present disclosure is described in detail below in conjunction with the accompanying drawings. In addition, in these drawings, a spatial rectangular coordinate system is established with the substrate in the display panel as a reference to intuitively present the positional relationship of each component in the display panel. In this spatial rectangular coordinate system, the X-axis and the Y-axis are parallel to the surface where the substrate is located, and the Z-axis is perpendicular to the surface where the substrate is located.

[0067] like Figures 1 to 3 As shown, the plane area of ​​the display panel can be divided into a display area 101 and a non-display area 102 surrounding the display area 101, and sub-pixels (the entity is a light-emitting device 210) such as R, G, B and a photosensitive unit such as O can be arranged in the display area 101. It should be noted that in some embodiments of the present disclosure, part of the wiring in the non-display area 102 can be arranged in the display area 101, so that the non-display area 102 can be designed as a single-sided frame.

[0068] The physical structure of the display panel may include a substrate 100 and a first isolation structure 310 located on the same side of the substrate 100, a plurality of photosensitive devices 220 and a plurality of light-emitting devices 210, wherein the light-emitting device 210 is a physical light-emitting structure of sub-pixels R, G, and B, and the photosensitive device 220 is a physical structure of the photosensitive unit O.

[0069] The first orthographic projection of part of the light emitting device 210 (such as the sub-pixel G) on the substrate 100 is a ring to surround the second orthographic projection of the photosensitive device 220 on the substrate 100. During operation, the light emitted by the light emitting device 210 corresponding to the first orthographic projection is reflected by the fingerprint of the finger after emitting from the display panel, and then enters the photosensitive device 220. The valleys and ridges of the fingerprint have different reflection angles and reflectivity to the light. In this way, the photosensitive device 220 can determine whether the received light corresponds to the valley or ridge of the fingerprint according to the intensity of the received light. In this way, the fingerprint can be identified based on the positions of multiple photosensitive devices 220.

[0070] The first isolation structure 310 includes isolation units corresponding to the photosensitive devices 220, each isolation unit corresponds to the photosensitive device 220, and the isolation unit is located between the annular light-emitting device 210 and the photosensitive device 220. In this way, the photosensitive device 220 is located inside the light-emitting device 210, so that more light emitted by the light-emitting device 210 can be received to improve the sensitivity and accuracy of optical recognition; in addition, the isolation unit is set between the photosensitive device 220 and the surrounding light-emitting devices 210 to block the light of lateral crosstalk, thereby improving the signal-to-noise ratio of optical recognition of the photosensitive device 220.

[0071] It should be noted that, in the embodiment of the present disclosure, the light emitting device 210 surrounding the photosensitive device 220 may completely surround the photosensitive device 220 or partially surround the photosensitive device 220, that is, the second orthographic projection of the light emitting device 210 surrounding the photosensitive device 220 on the substrate 100 may be as follows: Figure 2 The closed ring shape shown may alternatively be a non-closed ring shape.

[0072] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, the light emitting device 210 included in the display panel can be classified into a first type of light emitting device 210A, a second type of light emitting device 210B and a third type of light emitting device 210C, and the wavelengths of the emitted light of the first type of light emitting device 210A, the second type of light emitting device 210B and the third type of light emitting device 210C decrease in sequence, and the second type of light emitting device 210B surrounds the photosensitive device 220. The light intensity of the second type of light emitting device 210B accounts for the highest proportion (for example, the proportion can reach 70%), and the second type of light emitting device 210B surrounds the photosensitive device 220 to provide light for fingerprint recognition, which can improve the signal-to-noise ratio of optical recognition of the photosensitive device 220.

[0073] In at least one embodiment of the present disclosure, Figures 1 to 3As shown, the shapes of the outer edges of the orthographic projection of the second type light-emitting device 210B on the substrate 100 (the second orthographic projection mentioned above), the orthographic projection of the isolation unit of the first isolation structure 310 on the substrate 100, and the orthographic projection of the photosensitive device 220 on the substrate 100 (the first orthographic projection mentioned above) are similar and are arranged in concentric rings.

[0074] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, the first type of light emitting device 210A, the second type of light emitting device 210B and the third type of light emitting device 210C can correspond to sub-pixels R, G, and B respectively, that is, the first type of light emitting device 210A, the second type of light emitting device 210B and the third type of light emitting device 210C emit red light, green light, and blue light respectively.

[0075] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, the light emitting device 210 includes a first electrode 211, a first light emitting functional layer 212, and a second electrode 213 sequentially stacked on a substrate 100, and the photosensitive device 220 includes a third electrode 221, a second photosensitive functional layer 222, and a third electrode 221 sequentially stacked on the substrate 100, the first electrode 211 and the third electrode 221 are in the same layer and are provided with the same material, and the second electrode 213 and the fourth electrode 223 are in the same layer and are provided with the same material. In this way, the light emitting device 210 and the photosensitive device 220 can be prepared synchronously to simplify the preparation process of the display panel.

[0076] For example, the first electrode 211 may be an anode, and the second electrode 213 may be a cathode. For example, the first light-emitting functional layer 212 may include a first common layer, a light-emitting layer, and a second common layer, and the first common layer, the light-emitting layer, and the second common layer are sequentially stacked on the anode. The first common layer may include a hole injection layer, a hole transport layer, an electron blocking layer, etc., and the second common layer may include an electron injection layer, an electron transport layer, a hole blocking layer, etc.

[0077] In at least one embodiment of the present disclosure, the light emitting device 210 and the photosensitive device 220 are configured such that when driven: the potential of the first electrode 211 is higher than the potential of the second electrode 213 , and the potential of the third electrode 221 is lower than the potential of the fourth electrode 223 .

[0078] In at least one embodiment of the present disclosure, Figures 1 to 3 As shown, the orthographic projection of the first electrode 211 of the second type light emitting device 210B on the substrate 100 is a ring, and is spaced apart from the third electrode 221 .

[0079] For example, the substrate 100 may include a substrate and a driving circuit layer located on the substrate, the driving circuit layer includes a plurality of pixel driving circuits located in the second display area, and the display function layer is located on the driving circuit layer. For example, the pixel driving circuit may include a plurality of transistors TFT, capacitors, etc., for example, formed in various forms such as 7T1C (i.e., 7 transistors (TFT) and 1 capacitor (C)), 7T2C or 8T2C. The pixel driving circuit is connected to the light-emitting device 210 to control the switching state and the light brightness of the light-emitting device 210. Accordingly, the driving circuit layer may include a sensing driving circuit connected to the photosensitive device 220, and the sensing driving circuit also includes structures such as transistors TFT.

[0080] In the embodiments of the present disclosure, as long as the isolation unit of the first isolation structure 310 is arranged in a manner that can block light between the second type of light emitting device 210B and the photosensitive device 220, on this basis, there is no restriction on further arrangement of the isolation unit, which can be designed according to actual process requirements. In the following, several arrangement methods of the isolation unit are described through specific embodiments.

[0081] In some embodiments of the present disclosure, Figure 3 As shown, the isolation unit of the first isolation structure 310 is an insulating structure.

[0082] For example, the width of the isolation unit of the first isolation structure 310 may be 2-10 micrometers, and the thickness may be 1-3 micrometers.

[0083] For example, the isolation unit of the first isolation structure 310 includes an inorganic film layer; and / or, the isolation unit of the first isolation structure 310 includes an organic film layer. For example, further, the organic film layer is a black optical adhesive layer.

[0084] For example, Figure 3 As shown, the display panel further includes a pixel defining layer 400, which is located between the isolation unit and the substrate 100 and includes a plurality of pixel openings 401, in which the light emitting device 210 and the light sensing device 220 are located. For example, the pixel defining layer 400 is an organic film layer.

[0085] In other embodiments of the present disclosure, Figure 4 , Figure 5A and Figure 5BAs shown, the isolation unit of the first isolation structure 310 includes a first support portion 311 and a first crown portion 312. The first support portion 311 is located between the substrate 100 and the first crown portion 312. The first support portion 311 and the first crown portion 312 limit the first isolation opening 301. The first isolation opening 301 limits the photosensitive device 220. The orthographic projection of one end of the first support portion 311 facing the first crown portion 312 on the substrate 100 is located within the orthographic projection of the first crown portion 312 on the substrate 100. The first support portion 311 is a conductive structure. The second electrode 213 and the fourth electrode 223 are connected to the side surface of the first support portion 311.

[0086] It should be noted that, in the embodiments of the present disclosure, there is no limit on the number of isolation units provided between the second type of light emitting device 210B and the photosensitive device 220. In some embodiments of the present disclosure, the second electrode 213 and the fourth electrode 223 may be connected to the same isolation unit and electrically connected to each other, so that the fourth electrode 223 of the photosensitive device 220 may be electrically connected to the second electrode 213 of other light emitting devices 210 through the isolation unit to form a common electrode. In this case, the voltages of the first electrode 211 and the third electrode 221 may be controlled so that the potential of the first electrode 211 is higher than the potential of the second electrode 213, and the potential of the third electrode 221 is lower than the potential of the fourth electrode 223.

[0087] In some embodiments of the present disclosure, the second type of light emitting device 210B and the photosensitive device 220 are arranged as follows: Figure 5A An isolation unit is shown, that is, the second electrode 213 and the fourth electrode 223 can be connected to the same isolation unit and electrically connected to each other, so that the fourth electrode 223 of the photosensitive device 220 can be electrically connected to the second electrode 213 of other light-emitting devices 210 through the isolation unit to form a common electrode. In this case, the voltage of the first electrode 211 and the third electrode 221 can be controlled so that the potential of the first electrode 211 is higher than the potential of the second electrode 213, and the potential of the third electrode 221 is lower than the potential of the fourth electrode 223.

[0088] In some other embodiments of the present disclosure, the second type of light emitting device 210B and the photosensitive device 220 are arranged as follows: Figure 5CAt least two isolation units as shown, and the at least two isolation units are spaced apart from each other and arranged in a concentric ring around the photosensitive device 220. In this way, the second type of light-emitting device 210B and the photosensitive device 220 can be separately fabricated based on the isolation units to avoid interference between the processes of fabricating the second type of light-emitting device 210B and the photosensitive device 220. In this case, the second electrode 213 and the fourth electrode 223 are respectively connected to different isolation units, so as to be electrically disconnected from each other. In actual operation, the voltages of the second electrode 213 of the second type of light-emitting device 210B and the fourth electrode 223 of the photosensitive device 220 can be respectively driven.

[0089] In some other embodiments of the present disclosure, both sides of the isolation unit can be electrically disconnected from each other. For example, the middle part of the isolation unit can include an insulating part as a partition structure, or a groove or other structure that divides the isolation unit into two parts can be provided in the middle part of the isolation unit for connecting to the second electrode 213 and the fourth electrode 223 respectively.

[0090] In at least one embodiment of the present disclosure, as Figure 5A and Figure 5B shown, the orthographic projection of the first support portion 311 on the substrate 100 is located within the orthographic projection of the first crown portion 312 on the substrate 100. In this way, the isolation effect of the isolation unit on the first light-emitting functional layer 212 of the second type of light-emitting device 210B and the second photosensitive functional layer 222 of the photosensitive device 220 can be increased to eliminate the current crosstalk problem between the second type of light-emitting device 210B and the photosensitive device 220.

[0091] In at least one embodiment of the present disclosure, as Fig. 6A and Figure 6B shown, the display panel includes a first encapsulation layer 610. The first encapsulation layer 610 includes a plurality of encapsulation units 611, and the encapsulation units 611 cover the photosensitive device 220. The first encapsulation layer 610 can protect the photosensitive device 220 during the process of fabricating the light-emitting device 210 and the photosensitive device 220. For example, if the photosensitive device 220 is fabricated first and then the light-emitting device 210 is fabricated, after the photosensitive device 220 is formed, the first encapsulation layer 610 (or the encapsulation units 611 have been formed) covering the photosensitive device 220 is continuously formed, and then during the process of fabricating the light-emitting device 210 (including the etching process), the first encapsulation layer 610 protects the already formed photosensitive device 220.

[0092] In at least one embodiment of the present disclosure, as Fig. 7A and Figure 7BAs shown, the isolation unit of the first isolation structure 310 further includes a first bottom 313, the first bottom 313 is located between the substrate 100 and the first supporting portion 311, the orthographic projection of one end of the first supporting portion 311 facing the first bottom 313 on the substrate 100 is located within the orthographic projection of the first bottom 313 on the substrate 100, the first bottom 313 is a conductive structure, and the second electrode 213 and the fourth electrode 223 are connected to the area of ​​the surface of the first bottom 313 that is away from the substrate 100 and is not covered by the first supporting portion 311. Compared with the side wall of the first supporting portion 311, the second electrode 213 and the fourth electrode 223 are more easily deposited on the surface of the first bottom 313, so that the thickness and area of ​​the contact portion of the second electrode 213 and the fourth electrode 223 with the isolation unit can be increased to reduce the impedance between the second electrode 213 and the fourth electrode 223 and the isolation unit.

[0093] In at least one embodiment of the present disclosure, Fig. 7A and Figure 7B As shown, the orthographic projection of the first supporting portion 311 on the substrate 100 is located within the orthographic projection of the first bottom portion 313 on the substrate 100 .

[0094] In at least one embodiment of the present disclosure, the materials of the first bottom 313, the first support portion 311 and the first crown portion 312 are titanium, aluminum and titanium, respectively; or, the materials of the first bottom 313, the first support portion 311 and the first crown portion 312 are molybdenum, aluminum and titanium, respectively.

[0095] In at least one embodiment of the present disclosure, Fig. 7A and Figure 7B As shown, the display panel may further include a pixel defining layer 400, the pixel defining layer 400 is located between the isolation unit and the substrate 100, and includes a plurality of pixel openings 401, and the light emitting device 210 and the photosensitive device 220 are located in the pixel openings 401. For example, under this design, the pixel defining layer 400 may be an inorganic film layer. The inorganic layer has high density and strong resistance, so that the design thickness of the display panel can be reduced; in addition, the pixel defining layer 400 with a smaller thickness is conducive to the continuity of the second electrode 213 and the fourth electrode 223.

[0096] In the display panel, some functional film layers in the light-emitting devices and the photosensitive devices are formed by evaporation, and there are multiple functional film layers in each light-emitting device and photosensitive device. For example, the materials of some functional film layers (such as light-emitting layers) in the light-emitting devices that emit different light are different. Therefore, when evaporating these functional film layers through a mask plate (such as a fine mask plate), multiple alignments are required. In order to ensure the alignment accuracy, sufficient space needs to be reserved between different light-emitting devices and between light-emitting devices and photosensitive devices. This limits the arrangement density of the light-emitting devices (which can be called sub-pixels), making it difficult to further improve the PPI (pixel density) of the display panel.

[0097] In view of the above situation, in at least one embodiment of the present disclosure, if Figure 5A and Figure 5B , Fig. 6A and Figure 6B , Fig. 7A and Figure 7B As shown, the display panel may further include a second isolation structure 320, which is located on the substrate 100 and is a grid structure with a plurality of second isolation openings 302, in which the first type light emitting device 210A and the third type light emitting device 210C are located. The second isolation structure 320 and the adjacent first isolation structure 310 define a third isolation opening 303, in which the second type light emitting device 210B is located. In this way, the first type of light-emitting device 210A, the second type of light-emitting device 210B and the third type of light-emitting device 210C can be prepared separately through the first isolation structure 310 and the second isolation structure 320. Not only can the thickness of each film layer of the first light-emitting functional layer 212 of each light-emitting device 210 be controlled to improve the microcavity effect of the light-emitting device 210 and thus improve the brightness of the display panel, but the formation position of the film layer of each light-emitting device 210 can also be controlled. In the process of preparing these film layers, a mask plate is not required, so there is no need to consider the position accuracy, which reduces the gap between each light-emitting device 210, thereby improving the pixel density PPI of the display panel; in addition, through the first isolation structure 310 and the second isolation structure 320, the first light-emitting functional layer 212 of each light-emitting device 210 can be isolated while the second electrode 213 of each light-emitting device 210 is connected, thereby solving the current crosstalk problem between each light-emitting device 210.

[0098] In at least one embodiment of the present disclosure, Figure 5A and Figure 5B , Fig. 6A and Figure 6B , Fig. 7A and Figure 7BAs shown, the second isolation structure 320 is formed in the same layer and material as the first isolation structure 310. In this way, the first isolation structure 310 and the second isolation structure 320 can be prepared simultaneously, thereby simplifying the preparation process of the display panel.

[0099] For example, Figure 5A and Figure 5B As shown, the second isolation structure 320 includes a second support portion 321 and a second crown portion 322, the second support portion 321 is located between the substrate 100 and the second crown portion 322, the second support portion 321 and the second crown portion 322 limit the second isolation opening 302, the second isolation opening 302 limits the first type of light-emitting device 210A and the third type of light-emitting device 210C, the orthographic projection of one end of the second support portion 321 facing the second crown portion 322 on the substrate 100 is located within the orthographic projection of the second crown portion 322 on the substrate 100, the second support portion 321 is a conductive structure, and the second electrode 213 is connected to the side surface of the second support portion 321.

[0100] For example, in at least one embodiment of the present disclosure, Figure 5A and Figure 5B As shown, the orthographic projection of the second supporting portion 321 on the substrate 100 is located within the orthographic projection of the second crown portion 322 on the substrate 100 .

[0101] For example, in at least one embodiment of the present disclosure, Fig. 6A and Figure 6B As shown, a portion of the encapsulation unit 611 of the first encapsulation layer 610 may cover the light emitting device 210 .

[0102] For example, in at least one embodiment of the present disclosure, Fig. 7A and Figure 7B As shown, the second isolation structure 320 further includes a second bottom 323, which is located between the substrate 100 and the second support portion 321. The orthographic projection of one end of the second support portion 321 facing the second bottom 323 on the substrate 100 is located within the orthographic projection of the second bottom 323 on the substrate 100. The second bottom 323 is a conductive structure, and the second electrode 213 is connected to the area of ​​the surface of the second bottom 323 that is away from the substrate 100 and is not covered by the second support portion 321. Compared with the side wall of the second support portion 321, the deposition thickness of the second electrode 213 on the surface of the second bottom 323 will be larger, so that the second bottom 323 and the second electrode 213 have a larger contact area and bonding strength, thereby reducing the impedance between the second electrode 213 and the second isolation structure 320.

[0103] In the embodiments of the present disclosure, when the light-emitting device 210 is divided into a first light-emitting device 210A, a second light-emitting device 210B, and a third light-emitting device 210C that emit light of different colors, the first light-emitting device 210A, the second light-emitting device 210B, the third light-emitting device 210C, and the photosensitive device 220 are independently manufactured, but the film layers (evaporated film layers such as light-emitting functional layers, etc.) in the light-emitting device 210 and the photosensitive device 220 are evaporated on the entire surface of the display panel during the evaporation. For example, in the preparation process, assuming that the first type light-emitting device 210A, the second type light-emitting device 210B, the third type light-emitting device 210C and the photosensitive device 220 are prepared in sequence, when the first type light-emitting device 210A is prepared, the first type light-emitting device 210A is formed in the first isolation opening 301, the second isolation opening 302 and the third isolation opening 303, and the first encapsulation layer 610 is prepared on the display panel to cover the first type light-emitting device 210A, and then the second isolation opening 301 except for the first type light-emitting device 210A which is finally reserved is formed. The first packaging layer 610 outside 02 and the second electrode and the light-emitting functional layer in other first isolation openings 301, second isolation openings 302 and third isolation openings 303 are removed to obtain a packaging unit 611, and based on this method, the second type of light-emitting device 210B, the third type of light-emitting device 210C and the photosensitive device 220 are prepared in sequence. In this process, the first type of light-emitting device 210A, the second type of light-emitting device 210B, the third type of light-emitting device 210C, the photosensitive device 220 and the first packaging layer 610 are prepared in batches by multiple processes.

[0104] In at least one embodiment of the present disclosure, Figure 8 As shown, the display panel may further include a packaging structure 600 covering the light-emitting device 210 and the photosensitive device 220, and the packaging structure 600 includes a first packaging layer 610, a second packaging layer 620 and a third packaging layer 630 stacked in sequence on a side of the light-emitting device 210 and the photosensitive device 220 away from the substrate 100.

[0105] In some examples, the first encapsulation layer 610, the second encapsulation layer 620 and the third encapsulation layer 630 are an inorganic film layer, an organic film layer and an inorganic film layer in sequence. The inorganic film layer has high density to isolate water and oxygen, and the organic film layer has a large thickness to flatten the surface of the display panel.

[0106] For example, the material of the first encapsulation layer 610 may be silicon oxynitride with a thickness of 0.2 to 1 micron; the material of the second encapsulation layer 620 may be an acrylic polymer with a thickness of 6 to 20 microns; the material of the third encapsulation layer 630 may be silicon nitride with a thickness of 0.2 to 1 micron.

[0107] In other examples, the first encapsulation layer 610, the second encapsulation layer 620 and the third encapsulation layer 630 are all inorganic film layers, and the refractive index of the third encapsulation layer 630 is greater than the refractive index of the first encapsulation layer 610 and the second encapsulation layer 620. In this way, the emission rate of the light emitted by the light-emitting device 210 from the display panel can be increased, and the probability of the light being reflected inside the display panel and causing lateral crosstalk can be correspondingly reduced, and the incidence rate of the light emitted through the light-emitting device 210 and reflected by the fingerprint can be increased, thereby improving the signal-to-noise ratio of the photosensitive device 220; in addition, the thickness of the inorganic film layer is thinner, so that the thickness of the display panel can be reduced to reduce the distance from the photosensitive device 220 to the fingerprint, thereby further reducing the incidence of lateral crosstalk light to further improve the signal-to-noise ratio of the photosensitive device 220.

[0108] For example, the materials and film thicknesses of the first encapsulation layer 610, the second encapsulation layer 620, and the third encapsulation layer 630 may be any of the following: Al 2 O 3 (50nm±10nm), SiN (0.5um±0.1um), TiO (50nm±10nm), SiOX (0.5um±0.1um), SiON (0.5um±0.1um), etc. For example, the material of the third encapsulation layer 630 located in the outer layer can be Al 2 O 3 , so as to have higher density, thereby ensuring the packaging effect of the packaging structure 600.

[0109] In at least one embodiment of the present disclosure, Fig. 9 As shown, the display panel may further include a color filter layer 500, which is located on the side of the photosensitive device 220 away from the substrate 100 and includes color filter units 510 corresponding to the photosensitive devices 220. The color of the color filter unit 510 is the same as the light color of the second type of light-emitting device 210B, the orthographic projection of the color filter unit 510 on the substrate 100 is located within the orthographic projection of the second type of light-emitting device 210B on the substrate 100, and the orthographic projection of the color filter unit 510 on the substrate 100 coincides with the orthographic projection of the corresponding photosensitive device 220 on the substrate 100, or the orthographic projection of the photosensitive device 220 on the substrate 100 is located within the orthographic projection of the corresponding color filter unit 510 on the substrate 100. In this way, the color filter unit 510 of the color filter layer 500 can absorb interfering light, thereby further improving the signal-to-noise ratio of the photosensitive device 220.

[0110] In at least one embodiment of the present disclosure, the color filter layer 500 is located between the first encapsulation layer 610 and the second encapsulation layer 620; or, the color filter layer 500 is located between the second encapsulation layer 620 and the third encapsulation layer 630; or, the color filter layer 500 is located on a side of the third encapsulation layer 630 away from the substrate 100.

[0111] It should be noted that, when the film layers of the packaging structure 600 are all inorganic film layers, the thickness of the packaging structure 600 is relatively small, thereby reducing the thickness of the display panel; in addition, this arrangement can shorten the distance between the photosensitive device 220 and the fingerprint and the distance between the photosensitive device 220 and the color film layer 500 (assuming that the color film layer 500 is arranged on the side of the packaging structure 600 away from the photosensitive device 220), thereby further reducing the probability of lateral crosstalk light entering the photosensitive device 220, thereby further improving the signal-to-noise ratio of the photosensitive device 220.

[0112] In at least one embodiment of the present disclosure, Fig.10 As shown, the display panel further includes a lens structure 700 located on a side of the packaging structure 600 away from the substrate 100, the lens structure 700 includes a first dielectric portion 710 and a second dielectric portion 720, the refractive index of the first dielectric portion 710 is less than the refractive index of the second dielectric portion 720, the orthographic projection of the first dielectric portion 710 on the substrate 100 is located between the gap between the adjacent light-emitting devices 210 and the gap between the second type of light-emitting devices 210B and the photosensitive device 220 is within the orthographic projection on the substrate 100, and the orthographic projections of the light-emitting devices 210 and the photosensitive device 220 on the substrate 100 are located within the orthographic projection of the second dielectric portion 720 on the substrate 100. By providing the lens structure 700, the light emitted by the light-emitting device 210 can be totally reflected at the interface between the first dielectric portion 710 and the second dielectric portion 720, thereby reducing the generation of lateral crosstalk light and improving the signal-to-noise ratio of the photosensitive device 220.

[0113] In at least one embodiment of the present disclosure, the number of the first type of light emitting devices 210A, the second type of light emitting devices 210B, the third type of light emitting devices 210C, and the photosensitive devices 220 are equal. Figure 2 As shown, each adjacent first-type light-emitting device 210A, second-type light-emitting device 210B and third-type light-emitting device 210C constitutes a pixel P. In each pixel P, the ratio of the number of the first-type light-emitting device 210A, the second-type light-emitting device 210B, the third-type light-emitting device 210C and the photosensitive device 220 is 1:1:1:1:1. On this basis, there is no restriction on the arrangement of the first-type light-emitting device 210A, the second-type light-emitting device 210B and the third-type light-emitting device 210C (i.e., pixel arrangement), and it can be selected according to actual needs. Below, several pixel arrangement methods are described respectively through specific embodiments.

[0114] In some embodiments of the present disclosure, Fig.11As shown, the first type of light-emitting devices 210A, the second type of light-emitting devices 210B and the third type of light-emitting devices 210C are arranged into multiple rows and multiple columns. In each column, the first type of light-emitting devices 210A, the second type of light-emitting devices 210B and the third type of light-emitting devices 210C are arranged periodically in sequence, and the light-emitting devices 210 in adjacent columns are arranged alternately so that two light-emitting devices 210 located in adjacent columns and adjacent to each other are located in adjacent rows, respectively, wherein each first type of light-emitting device 210A is adjacent to three second type of light-emitting devices 210B and three third type of light-emitting devices 210C, each second type of light-emitting device 210B is adjacent to three first type of light-emitting devices 210A and three third type of light-emitting devices 210C, and each third type of light-emitting device 210C is adjacent to three first type of light-emitting devices 210A and three second type of light-emitting devices 210B.

[0115] In other embodiments of the present disclosure, Fig.12 As shown, the first type of light-emitting devices 210A, the second type of light-emitting devices 210B and the third type of light-emitting devices 210C are arranged in multiple rows and columns, the first type of light-emitting devices 210A and the third type of light-emitting devices 210C are arranged in the same column and arranged alternately in the column, the column where the first type of light-emitting devices 210A and the third type of light-emitting devices 210C are located is different from the column where the second type of light-emitting devices 210B are located, the column where the first type of light-emitting devices 210A and the third type of light-emitting devices 210C are located is alternately arranged with the column where the second type of light-emitting devices 210B are located, and every two adjacent first type of light-emitting devices 210A and the third type of light-emitting devices 210C in the same column are located in the same row with one second type of light-emitting device 210B in the adjacent column.

[0116] For example, Fig.13 As shown, in the column where the second type light emitting devices 210B are located, every two second type light emitting devices 210B form a group, and the distance D1 between the two second type light emitting devices 210B in the same group is smaller than the distance D2 between the second type light emitting devices 210B in different groups. In this way, the photosensitive device 220 can more easily receive the light emitted by the two second type light emitting devices 210B, thereby improving the signal-to-noise ratio of the photosensitive device 220.

[0117] In some other embodiments of the present disclosure, please refer to Figure 2 The first type of light emitting device 210A, the second type of light emitting device 210B and the third type of light emitting device 210C are arranged in multiple rows and columns. The column where the first type of light emitting device 210A is located, the column where the second type of light emitting device 210B is located and the column where the third type of light emitting device 210C is located are all different. In each row, the first type of light emitting device 210A, the second type of light emitting device 210B and the third type of light emitting device 210C are arranged periodically in sequence.

[0118] At least one embodiment of the present disclosure provides a display device, which may be the display panel in the above embodiment. For example, the display device may include a touch structure, an optical film (such as a polarizer), a cover plate, and other structures arranged on the light-emitting side of the display panel.

[0119] For example, the display device may be any product or component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, or the like.

[0120] It is understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document is not limited here.

[0121] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0122] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, etc. made within the spirit and principles of this specification should be included in the protection scope of this specification.

Claims

1. A display panel, characterized in that: include: substrate; A plurality of photosensitive devices are located on the substrate; A plurality of light-emitting devices are located on the same side of the substrate as the plurality of photosensitive devices, and first orthographic projections of some of the light-emitting devices on the substrate surround second orthographic projections of corresponding photosensitive devices on the substrate; A first isolation structure is located on the substrate and includes isolation units corresponding to the photosensitive devices respectively, and the isolation units are located between the light-emitting device corresponding to the first orthographic projection surrounding the second orthographic projection and the corresponding photosensitive device.

2. The display panel according to claim 1, characterized in that: The plurality of light emitting devices include a first type of light emitting device, a second type of light emitting device and a third type of light emitting device, The wavelengths of the emitted lights of the first type of light emitting devices, the second type of light emitting devices and the third type of light emitting devices decrease in sequence, and the second type of light emitting devices surround the photosensitive device; Preferably, the outer edges of the first orthographic projection of the second type light emitting device on the substrate, the orthographic projection of the isolation unit on the substrate and the second orthographic projection of the photosensitive device on the substrate have similar shapes and are arranged in concentric rings; Preferably, the first type of light emitting devices, the second type of light emitting devices and the third type of light emitting devices emit red light, green light and blue light in sequence.

3. The display panel according to claim 2, characterized in that: The light emitting device comprises a first electrode, a first light emitting functional layer and a second electrode stacked in sequence on the substrate, the photosensitive device comprises a third electrode, a second photosensitive functional layer and a third electrode stacked in sequence on the substrate, and The first electrode and the third electrode are provided in the same layer and the same material, and the second electrode and the fourth electrode are provided in the same layer and the same material; Preferably, the light emitting device and the light sensing device are configured such that when driven: the potential of the first electrode is higher than the potential of the second electrode, and the potential of the third electrode is lower than the potential of the fourth electrode; Preferably, the first orthographic projection of the first electrode of the second type of light emitting device on the substrate is in a ring shape and is spaced apart from the third electrode.

4. The display panel according to claim 3, characterized in that: The isolation unit is an insulating structure; Preferably, The isolation unit includes an inorganic film layer; and / or The isolation unit includes an organic film layer, and further preferably, the organic film layer is a black optical adhesive layer; Preferably, the display panel further comprises a pixel defining layer, the pixel defining layer is located between the isolation unit and the substrate, and comprises a plurality of pixel openings, the light emitting device and the photosensitive device are located in the pixel openings; Preferably, the pixel defining layer is an organic film layer.

5. The display panel according to claim 3, characterized in that: The isolation unit includes a first support portion and a first crown portion, the first support portion is located between the substrate and the first crown portion, the first support portion and the first crown portion limit a first isolation opening, and the first isolation opening limits the photosensitive device. The orthographic projection of one end of the first supporting portion facing the first crown portion on the substrate is located within the orthographic projection of the first crown portion on the substrate, and The first support portion is a conductive structure, and the second electrode and the fourth electrode are connected to the side surface of the first support portion; Preferably, at least two isolation units are arranged between the second type light emitting device and the photosensitive device, and at least two isolation units are spaced from each other and arranged in a concentric ring around the photosensitive device; Preferably, the orthographic projection of the first supporting portion on the substrate is located within the orthographic projection of the first crown portion on the substrate; Preferably, the isolation unit further comprises a first bottom portion, the first bottom portion is located between the substrate and the first supporting portion, an orthographic projection of one end of the first supporting portion facing the first bottom portion on the substrate is located within an orthographic projection of the first bottom portion on the substrate, the first bottom portion is a conductive structure, the second electrode and the fourth electrode are connected to an area of ​​the surface of the first bottom portion facing away from the substrate that is not covered by the first supporting portion, and further preferably, an orthographic projection of the first supporting portion on the substrate is located within an orthographic projection of the first bottom portion on the substrate; Preferably, the materials of the first bottom portion, the first supporting portion and the first crown portion are titanium, aluminum and titanium in sequence; or, the materials of the first bottom portion, the first supporting portion and the first crown portion are molybdenum, aluminum and titanium in sequence.

6. The display panel according to claim 5, characterized in that: The display panel further includes a pixel defining layer, the pixel defining layer is located between the isolation unit and the substrate, and includes a plurality of pixel openings, the light emitting device and the photosensitive device are located in the pixel openings; Preferably, the pixel defining layer is an inorganic film layer.

7. The display panel according to claim 5, characterized in that: Also includes: A second isolation structure, located on the substrate and having a grid structure to have a plurality of second isolation openings, wherein the first type of light emitting devices and the third type of light emitting devices are located in the second isolation openings; The second isolation structure and the adjacent first isolation structure define a third isolation opening, and the second type of light emitting device is located in the third isolation opening; Preferably, the second isolation structure is in the same layer and made of the same material as the first isolation structure.

8. The display panel according to any one of claims 2 to 7, characterized in that: Also includes: A color filter layer, located on a side of the photosensitive device away from the substrate, and comprising color filter units corresponding to the photosensitive devices respectively; The color of the color film unit is the same as the light emission color of the second type of light emitting device, and the orthographic projection of the color film unit on the substrate is within the orthographic projection of the second type of light emitting device on the substrate. The orthographic projection of the color filter unit on the substrate coincides with the second orthographic projection of the corresponding photosensitive device on the substrate, or the second orthographic projection of the photosensitive device on the substrate is located within the orthographic projection of the corresponding color filter unit on the substrate; Preferably, the display panel comprises a packaging structure covering the light emitting device and the photosensitive device, the packaging structure comprising a first packaging layer, a second packaging layer and a third packaging layer stacked in sequence on a side of the light emitting device and the photosensitive device away from the substrate, and The color filter layer is located between the first encapsulation layer and the second encapsulation layer; or The color filter layer is located between the second encapsulation layer and the third encapsulation layer; or The color filter layer is located on a side of the third packaging layer away from the substrate.

9. The display panel according to any one of claims 2 to 7, characterized in that: Also included is a packaging structure covering the light emitting device and the photosensitive device, wherein the packaging structure includes a first packaging layer, a second packaging layer and a third packaging layer stacked in sequence on a side of the light emitting device and the photosensitive device away from the substrate, and The first encapsulation layer, the second encapsulation layer and the third encapsulation layer are an inorganic film layer, an organic film layer and an inorganic film layer in sequence; or The first encapsulation layer, the second encapsulation layer and the third encapsulation layer are all inorganic film layers, and the refractive index of the third encapsulation layer is greater than the refractive index of the first encapsulation layer and the second encapsulation layer; Preferably, the display panel also includes a lens structure located on a side of the packaging structure away from the substrate, the lens structure includes a first dielectric portion and a second dielectric portion, the refractive index of the first dielectric portion is smaller than the refractive index of the second dielectric portion, the orthographic projection of the first dielectric portion on the substrate is located within the gap between adjacent light-emitting devices and the gap between the second type of light-emitting devices and the photosensitive devices on the substrate, and the orthographic projections of the light-emitting devices and the photosensitive devices on the substrate are located within the orthographic projection of the second dielectric portion on the substrate.

10. The display panel according to any one of claims 2 to 7, characterized in that: Each adjacent first-type light-emitting device, second-type light-emitting device, and third-type light-emitting device constitutes a pixel, and in each of the pixels, the number ratio of the first-type light-emitting device, the second-type light-emitting device, the third-type light-emitting device, and the photosensitive device is 1:1:1:1:1; Preferably, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged in multiple rows and multiple columns, and in each column, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged periodically in sequence, and the light-emitting devices in adjacent columns are arranged alternately, so that two light-emitting devices located in adjacent columns and adjacent to each other are located in adjacent rows, respectively, wherein each of the first type of light-emitting devices is adjacent to three of the second type of light-emitting devices and three of the third type of light-emitting devices, each of the second type of light-emitting devices is adjacent to three of the first type of light-emitting devices and three of the third type of light-emitting devices, and each of the third type of light-emitting devices is adjacent to three of the first type of light-emitting devices and three of the second type of light-emitting devices; or The first type of light emitting devices, the second type of light emitting devices and the third type of light emitting devices are arranged in multiple rows and multiple columns, the first type of light emitting devices and the third type of light emitting devices are arranged in the same column and arranged alternately in the column, the column where the first type of light emitting devices and the third type of light emitting devices are located is different from the column where the second type of light emitting devices are located, the column where the first type of light emitting devices and the third type of light emitting devices are located is alternately arranged with the column where the second type of light emitting devices are located, every two adjacent first type of light emitting devices and the third type of light emitting devices in the same column and one second type of light emitting device in an adjacent column are located in the same row, and further preferably, in the column where the second type of light emitting devices are located, every two second type of light emitting devices constitute a group, and the spacing between two second type of light emitting devices in the same group is smaller than the spacing between second type of light emitting devices in different groups; or The first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged in multiple rows and columns, the columns where the first type of light-emitting devices are located, the columns where the second type of light-emitting devices are located and the columns where the third type of light-emitting devices are located are all different, and in each row, the first type of light-emitting devices, the second type of light-emitting devices and the third type of light-emitting devices are arranged periodically in sequence.

Images