Display panel and display device

Abstract

A display panel and a display device. The display panel comprises: a photosensitive layer, comprising a photosensitive element; a first collimating layer (117), comprising a first opening (1171); an encapsulation layer; and a second collimating layer, comprising a second opening (1253), wherein the first opening (1171), the second opening (1253), and the photosensitive element overlap in the thickness direction of the photosensitive layer. The display panel further comprises a first organic layer (123); the encapsulation layer further comprises a second organic layer (120); and in the thickness direction of the photosensitive layer, the first organic layer (123) and the second organic layer (120) overlap, and the first opening (1171), the second opening (1253), and the photosensitive element overlap.

Description

Display panel and display device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 30, 2023, with application number 202310804380.3 and invention name “Display Panel and Display Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] To improve fingerprint recognition accuracy and prevent valley signal crosstalk, related technologies use a collimated optical path within the panel. This path is achieved by using the BM (Black Matrix) and BPDL (Black Pixel Definition Layer) within the PLP (depolarizer technology, which uses R / G / B color resists and a black matrix instead of polarizers). This converges the specific light reflected by the fingerprint into the fingerprint recognition area, thereby improving optical recognition accuracy. However, the collimating holes in related technologies are too small, resulting in a fingerprint sensor with a small area and low sensitivity. Technical issues

[0004] The present application provides a display panel and a display device to solve the problem in the related art that the aperture of the collimating hole is too small, resulting in a fingerprint sensor with too small an area and low sensitivity. Technical Solutions

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising: a photosensitive layer comprising a photosensitive element; a first collimating layer located on the photosensitive element and comprising a first opening; an encapsulation layer located on the first collimating layer; a second collimating layer located on the encapsulation layer and comprising a second opening, wherein the first opening, the second opening, and the photosensitive element overlap in a thickness direction of the photosensitive layer; wherein the display panel further comprises a first organic layer located between the encapsulation layer and the second collimating layer, and the encapsulation layer further comprises a second organic layer, and the first organic layer and the second organic layer overlap with the first opening, the second opening, and the photosensitive element in a thickness direction of the photosensitive layer.

[0006] In one embodiment, the first alignment layer is a pixel definition layer, the pixel definition layer is provided with a plurality of pixel openings and a plurality of first openings, light-emitting devices are provided in the pixel openings, and the pixel definition layer includes a black organic material.

[0007] In one embodiment, the second alignment layer is a color filter layer, which includes color resist and a black matrix. The black matrix is ​​further provided with a plurality of color resist openings and a plurality of the second openings, and the plurality of color resists are located in the color resist openings.

[0008] In one embodiment, the aperture of the first opening is larger than the aperture of the second opening.

[0009] In one embodiment, the aperture of the first opening is smaller than the aperture of the second opening.

[0010] In one embodiment, the display panel also includes a touch layer, which is located between the encapsulation layer and the first organic layer. The touch layer includes a plurality of touch signal lines, and a third opening is provided between at least two adjacent touch signal lines. The third opening overlaps with the first opening and the second opening in the thickness direction of the photosensitive layer.

[0011] In one embodiment, the display panel further includes a first flat layer, wherein the first flat layer includes a flat portion and a first retaining wall;

[0012] The flat portion is located between the touch layer and the first organic layer, and the first barrier wall is located on the pixel definition layer and outside the first organic layer.

[0013] In one embodiment, a portion of the flat portion fills the third opening.

[0014] In one embodiment, the encapsulation layer includes a first inorganic layer and a second inorganic layer, and the first inorganic layer, the second organic layer and the second inorganic layer overlap in sequence in the thickness direction of the photosensitive layer. The display panel also includes a plurality of second retaining walls, and the plurality of second retaining walls are located on the first inorganic layer. The second retaining walls are located on the outside of the second organic layer, and the orthographic projection of the second retaining wall on the pixel definition layer is located outside the orthographic projection of the first retaining wall on the first collimating layer.

[0015] In a second aspect, an embodiment of the present application further provides a display device, including a display panel, wherein the display panel includes: a photosensitive layer including a photosensitive element; a first collimating layer located on the photosensitive element and including a first opening; an encapsulation layer located on the first collimating layer; a second collimating layer located on the encapsulation layer and including a second opening, wherein the first opening, the second opening, and the photosensitive element overlap in a thickness direction of the photosensitive layer; wherein the display panel further includes a first organic layer located between the encapsulation layer and the second collimating layer, and the encapsulation layer further includes a second organic layer, and the first organic layer and the second organic layer overlap with the first opening, the second opening, and the photosensitive element in a thickness direction of the photosensitive layer.

[0016] In one embodiment, the first alignment layer is a pixel definition layer, the pixel definition layer is provided with a plurality of pixel openings and a plurality of first openings, light-emitting devices are provided in the pixel openings, and the pixel definition layer includes a black organic material.

[0017] In one embodiment, the second alignment layer is a color filter layer, which includes color resist and a black matrix. The black matrix is ​​further provided with a plurality of color resist openings and a plurality of the second openings, and the plurality of color resists are located in the color resist openings.

[0018] In one embodiment, the aperture of the first opening is larger than the aperture of the second opening.

[0019] In one embodiment, the aperture of the first opening is smaller than the aperture of the second opening.

[0020] In one embodiment, the display device further includes a touch layer, which is located between the encapsulation layer and the first organic layer. The touch layer includes a plurality of touch signal lines, and a third opening is provided between at least two adjacent touch signal lines. The third opening overlaps with the first opening and the second opening in the thickness direction of the photosensitive layer.

[0021] In one embodiment, the display device further includes a first flat layer, the first flat layer includes a flat portion and a first retaining wall; wherein the flat portion is located between the touch layer and the first organic layer, and the first retaining wall is located on the pixel definition layer and outside the first organic layer.

[0022] In one embodiment, a portion of the flat portion fills the third opening.

[0023] In one embodiment, the encapsulation layer includes a first inorganic layer and a second inorganic layer, and the first inorganic layer, the second organic layer and the second inorganic layer overlap in sequence in the thickness direction of the photosensitive layer. The display device also includes a plurality of second retaining walls, and the plurality of second retaining walls are located on the first inorganic layer. The second retaining walls are located on the outside of the second organic layer, and the orthographic projection of the second retaining wall on the pixel definition layer is located outside the orthographic projection of the first retaining wall on the first collimating layer. Beneficial effects

[0024] Compared with the prior art, in the display panel and display device provided by the present application, a first organic layer is arranged on the touch layer and a second organic layer is arranged in the encapsulation layer. The length of the collimator is modulated by the first organic layer and the second organic layer, so that the length value range of the collimator is increased, thereby increasing the value range of the diameter of the collimator, and then increasing the area of ​​the photosensitive element, thereby improving the sensitivity of fingerprint recognition, and improving the problem in the related art that the aperture of the collimating hole is too small, resulting in the area of ​​the fingerprint sensor being too small and the sensitivity being low. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of a display panel according to an embodiment of the present application.

[0026] FIG2 is a schematic structural diagram of a display panel when recognizing a fingerprint according to an embodiment of the present application.

[0027] FIG3 is a schematic structural diagram of a collimator according to an embodiment of the present application.

[0028] FIG. 4 is a schematic structural diagram of a display panel according to an embodiment of the present application. Modes for Carrying Out the Invention

[0029] The present application provides a display panel and a display device. To make the purpose, technical solution, and effects of the present application clearer and more explicit, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0030] To improve the accuracy of fingerprint recognition and prevent valley signal crosstalk, related technologies form a collimated light path inside the panel. This involves using the BM (Black Matrix) and BPDL (Black Pixel Definition Layer) in the PLP (depolarizer technology, which uses color resists R / G / B and a black matrix instead of polarizers) to form a collimated light path. This “converges” the specific light reflected by the fingerprint 200 to the fingerprint recognition area, thereby improving optical recognition accuracy. However, the aperture of the collimating hole in the related technology is too small, resulting in a too small sensor area. Furthermore, the small collimating aperture also makes the process difficult to implement.

[0031] As shown in Figure 1, this embodiment provides a display panel, which includes a substrate 101, a buffer layer 102, a semiconductor, a first gate insulating layer 104, a first gate 105, an interlayer insulating layer 109, a source electrode 1121, a drain electrode 1122, a third flat layer 115, an anode 116, a pixel definition layer 117, an organic emission layer, a cathode, an encapsulation layer, and a touch layer.

[0032] The substrate 101 may be made of an organic material having insulating properties and being flexible so as to be capable of being heat-treated at a temperature equal to or greater than about 450°C, and the substrate 101 may be formed as a single layer, for example, of polyimide or may be formed as a plurality of layers of polyimide formed by repeatedly stacking the polyimide by coating and curing. The substrate 101 may be a flexible substrate 101 formed by coating a polymeric material such as polyimide on a supporting substrate (not shown) and curing the polymeric material. In this case, the substrate 101 may be formed into a plurality of layers by repeatedly coating and curing the polymeric material. The supporting substrate may be formed of glass, metal, or ceramic, and the polyimide may be coated on the supporting substrate by coating processes such as spin coating, slit coating, inkjet coating, etc. The supporting substrate may be removed in a subsequent process.

[0033] The buffer layer 102 may provide a planarization layer on the upper surface of the substrate 101 and may block or prevent impurities and moisture from penetrating from the substrate 101 into the display unit (ie, the organic light emitting element).

[0034] A semiconductor is formed on the buffer layer 102, wherein the semiconductor is formed of polycrystalline silicon. The semiconductor is divided into a channel region 1032 and a source region 1031 and a drain region 1033 formed on both sides of the channel region 1032. The channel region 1032 of the semiconductor is polycrystalline silicon without impurities, that is, an intrinsic semiconductor. The source region 1031 and the drain region 1033 are polycrystalline silicon doped with conductive impurities, that is, impurity semiconductors. The impurities doped in the source region 1031 and the drain region 1033 can be either P-type impurities or N-type impurities.

[0035] The first gate insulating layer 104 is formed on the semiconductor and can be a single layer or multiple layers including at least one of tetraethylorthosilicate (TEOS), silicon nitride, and silicon oxide.

[0036] The first gate 105 is formed on the first gate insulating layer 104 and overlaps the channel region 1032. The first gate 105 can be formed as a single layer or multiple layers including a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance.

[0037] An interlayer insulating layer 109 is formed on the first gate electrode 105. A passivation layer 111 is formed on the interlayer insulating layer 109. The passivation layer 111, the interlayer insulating layer 109, and the first gate insulating layer 104 include a source contact hole and a drain contact hole, through which the source region 1031 and the drain region 1033 are exposed, respectively.

[0038] The source electrode 1121 and the drain electrode 1122 are both formed on the passivation layer 111. The source electrode 1121 is connected to the source region 1031 through the source contact hole, and the drain electrode 1122 is connected to the drain region 1033 through the drain contact hole. The source electrode 1121 and the drain electrode 1122 can be formed as multiple layers or a single layer of a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance. For example, the source electrode 1121 and the drain electrode 1122 can be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti, or Mo / Al / Mo, among others.

[0039] In addition, the first gate electrode 105, the source electrode 1121, and the drain electrode 1122 are respectively the control electrode, input electrode, and output electrode of the thin film transistor in the display panel driving circuit, and together with the semiconductor form a thin film transistor. The channel of the thin film transistor is between the source electrode 1121 and the drain electrode 1122.

[0040] The third planar layer 115 and the fourth planar layer 113 are formed on the source electrode 1121 and the drain electrode 1122. The third planar layer 115 is formed on the fourth planar layer 113. The third planar layer 115 and the fourth planar layer 113 include through-holes, through which the drain electrode 1122 is exposed. In some embodiments, the display panel further includes a first connecting portion 1141, which is provided on the fourth planar layer 113 and electrically connected to the drain electrode 1122.

[0041] The anode 116 is formed on the third planar layer 115 and is electrically connected to the first connection portion 1141 through a through hole.

[0042] The pixel definition layer 117 is formed on the anode 116. The pixel definition layer 117 has an anode opening through which the anode 116 is exposed. The pixel definition layer 117 can be formed of a resin such as polyacrylate or polyimide, or a silica-based organic material.

[0043] An organic emission layer (not shown) is formed in the opening of the pixel definition layer 117. The organic emission layer is formed of a plurality of layers including one or more emission layers, a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL). In the case where the organic emission layer includes all of the above layers, the hole injection layer (HIL) may be located on the anode 116, and the hole transport layer (HTL), the emission layer, the electron transport layer (ETL), and the electron injection layer (EIL) may be sequentially laminated on the hole injection layer (HIL).

[0044] A cathode (not shown) is formed on the pixel definition layer 117 and the organic emissive layer. The cathode serves as the cathode of an organic light-emitting diode (OLED). Thus, the anode 116, the organic emissive layer, and the cathode form an organic light-emitting device (OLED). In the following embodiment, the cathode has openings corresponding to the first opening 1171 and the second opening 1253 above the photosensitive element.

[0045] Among them, the organic light emitting diode display may have any one structure of a top display type, a bottom display type, and a dual display type according to the direction of light emitted by the organic light emitting device.

[0046] In the top display type, the anode 116 is formed as a reflective layer, and the cathode is formed as a semi-transmissive layer or a transmissive layer. On the other hand, in the case of the bottom display type, the anode 116 is formed as a semi-transmissive layer, and the cathode is formed as a reflective layer. In addition, in the case of the dual display type, the anode 116 and the cathode are formed as transparent layers or semi-transmissive layers.

[0047] The reflective layer and the semi-transmissive layer are made of one or more metals such as magnesium (Mg), silver (Ag), gold (Au), calcium (Ca), lithium (Li), chromium (Cr), and aluminum (Al), or alloys thereof. The reflective layer and the semi-transmissive layer are determined by thickness, and as the thickness decreases, the transmittance increases, so the semi-transmissive layer can be formed to have a thickness of about 200 nm or less. The transparent layer is formed of a material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In2O3).

[0048] An encapsulation layer is formed on the cathode. The encapsulation layer can be formed by alternately laminating one or more organic layers and one or more inorganic layers. A plurality of inorganic layers or organic layers can be provided.

[0049] Wherein, the organic layer is formed by a polymer and can be, for example, a laminate or a single layer formed by any one of polyethylene terephthalate, polyimide, polycarbonate, epoxy resin, polyethylene, and polyacrylate. The organic layer can be formed by polyacrylate, specifically including a substance obtained by polymerizing a monomer composition including a monomer based on a diacrylate and a monomer based on a triacrylate. The monomer composition can also include a monomer based on a monoacrylate. In addition, the monomer composition can also include a well-known photoinitiator such as TPO, but the monomer composition is not limited to this. The inorganic layer can be a laminate or a single layer including a metal oxide or a metal nitride. For example, the inorganic layer can include any one of SiNx, Al2O3, SiO2, and TiO2.

[0050] The uppermost layer of the encapsulation layer, which is exposed to the outside, may be formed of an inorganic layer to prevent moisture from being transmitted into the organic light-emitting diode display. The encapsulation layer may include at least one sandwich structure in which at least one organic layer is interposed between at least two inorganic layers. Additionally, the encapsulation layer may include at least one sandwich structure in which at least one inorganic layer is interposed between at least two organic layers.

[0051] The encapsulation layer may sequentially include a first inorganic layer 118, a second organic layer 120, and a second inorganic layer 121 located on the cathode. Furthermore, in some embodiments, the encapsulation layer may sequentially include a first inorganic layer 118, a second organic layer 120, a second inorganic layer 121, a third organic layer, and a third inorganic layer located on the cathode. Furthermore, in other embodiments, the encapsulation layer may sequentially include a first inorganic layer 118, a second organic layer 120, a second inorganic layer 121, a third organic layer, a third inorganic layer, a fourth organic layer, and a fourth inorganic layer located on the cathode. As shown in FIG. 1 , in this embodiment, the second organic layer 120 is completely covered by the second inorganic layer 121, i.e., the second inorganic layer 121 covers the surface of the second organic layer 120.

[0052] The above embodiment has shown an embodiment of the display panel of the present application. In the subsequent embodiments, the present application will elaborate on the technical concept of the present application in detail based on the structure of the above embodiment. Therefore, the features appearing in the above embodiment will no longer be described. Unless otherwise specified, the subsequent embodiments of the present application may refer to the features in the above embodiment.

[0053] As shown in Figure 4, in one embodiment, the encapsulation layer includes a first inorganic layer 118, a second organic layer 120, and a second inorganic layer 121. The first inorganic layer 118, the second organic layer 120, and the second inorganic layer 121 overlap in sequence along the thickness direction of the photosensitive layer. The display panel also includes a plurality of second retaining walls 119, which are located on the first inorganic layer 118 and outside the second organic layer 120. The provision of the second retaining walls 119 can prevent the second organic layer 120 from overflowing during formation.

[0054] In one embodiment, the photosensitive element includes a photodiode or a phototransistor. The display panel further includes a second gate layer, a first electrode 110, a PIN junction 108, a touch layer, a first organic layer 123, and a color filter layer. The second gate layer includes a second gate 1071 and a second electrode 1072. The PIN junction 108 is located on the second gate 1071, the interlayer insulating layer 109 is located on the second gate 1071 and the PIN junction 108, the first electrode 110 is located on the interlayer insulating layer 109, and the passivation layer 111 is located on the first electrode 110. The first electrode 110 and the second electrode 1072 are both electrically connected to the PIN junction 108. The first electrode 110, the PIN junction 108, and the second electrode 1072 constitute the photosensitive element. Therefore, the photosensitive layer may include the second gate layer, the film layer where the PIN junction 108 is located, and the film layer where the first electrode 110 is located. In some embodiments, a second gate insulating layer 106 is disposed on the first gate 105 , and the second gate layer is disposed on the second gate insulating layer 106 . In some embodiments, a second connecting portion 1142 is further disposed on the fourth planar layer 113 , and the second connecting portion 1142 is configured to electrically connect to the first electrode 110 .

[0055] The pixel definition layer 117 further has a first opening 1171, which is opposite to the photosensitive element. The pixel definition layer 117 serves as a first alignment layer and comprises a black organic material. The first opening 1171 is used to restrict light entering the photosensitive element.

[0056] The touch layer may be directly disposed on the encapsulation layer, the touch layer including a plurality of touch sensors (not shown) and a plurality of touch signal lines 1271. The touch sensors and the touch signal lines 1271 may have a single-layer structure or a multi-layer structure. Each of the touch sensors and the touch signal lines 1271 may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), poly (3,4-ethylenedioxythiophene) (PEDOT), metal nanowires and / or graphene. Each of the touch sensors and the touch signal lines 1271 may include a metal layer such as molybdenum, silver, titanium, copper, aluminum and / or alloys thereof. The touch sensors and the touch signal lines may have the same single-layer structure or may have different layer structures from each other.

[0057] The first organic layer 123 is located on the touch layer. The material of the first organic layer 123 can be the same as that of the second organic layer 120. The color filter layer is located on the first organic layer 123 and includes a color resist 1252 and a black matrix 1251. The black matrix 1251 further defines a plurality of color resist openings and a plurality of second openings 1253. The plurality of color resists 1252 are located within the color resist openings. The second openings 1253 are used to confine light entering the first openings 1171. In this embodiment, the color filter layer serves as a second collimating layer. The first openings 1171, the second openings 1253, and the photosensitive element overlap in the thickness direction of the photosensitive layer. The first organic layer 123 and the second organic layer 120 overlap in the thickness direction of the photosensitive layer, with the first openings 1171, the second openings 1253, and the photosensitive element. Both the first organic layer 123 and the second organic layer 120 are formed using an inkjet printing process.

[0058] As shown in Figures 2 and 3, the first opening 1171 and the second opening 1253 form a collimator for confining light entering the photosensitive element. The aperture of the second opening 1253 is the diameter D of the collimator, the height from the black matrix 1251 to the pixel definition layer 117 is the length L of the collimator, and the height from the fingerprint 200 to the black matrix 1251 is H. Assuming the peak-to-valley distance of the fingerprint 200 is Z, and the angle between the valley and the peak of the fingerprint and the collimator is θ, the following formula is obtained:

[0059] From formula 1, we can get:

[0060] As can be seen from the above, when the angle θ between the finger valley and the finger peak to the collimator is constant (the smaller θ, the higher the optical recognition accuracy), the collimator diameter D is proportional to the collimator length L, and the collimator diameter D is positively correlated with the area of ​​the photosensitive element. Therefore, increasing the collimator diameter D can improve the sensitivity of the photosensitive element. In the related art, the maximum length L of the collimator is 21 microns. If the collimator angle θ is to be 5°, then according to formula (2), the collimator diameter D can be calculated to be 5.3 microns. However, in the current technology, the aperture limit of the black matrix 1251 is 7 microns, that is, the process limit of the existing process is difficult to meet the high sensitivity requirements. Therefore, it is difficult to ensure recognition sensitivity while ensuring optical recognition accuracy in the related art.

[0061] In this embodiment, a second organic layer 120 is provided in the encapsulation layer, and a first organic layer 123 is provided on the touch layer. Therefore, in this application, the length of the collimator can be modulated by the first organic layer 123 and the second organic layer 120. Based on the current ink printing process, the thickness of the first organic layer 123 and the second organic layer 120 can be 18 microns, so the length L of the collimator in this application can be 36 microns. For example, when the thickness of the first organic layer 123 plus the thickness of the second organic layer 120 in this application is 36 microns, and the collimator angle is θ≈5°, according to Formula 2, it can be seen that the maximum diameter D of the collimator in this application can be 9 mm, which is much larger than the 5.3 microns in the related art. Therefore, under the same optical recognition accuracy, the area of ​​the photosensitive element in this application is larger than that of the photosensitive element in the related art. Therefore, the display panel in the embodiment of this application can achieve higher sensitivity.

[0062] In this embodiment, a first organic layer 123 is provided on the touch layer, and a second organic layer 120 is provided in the encapsulation layer. The length of the collimator is modulated jointly by the first organic layer 123 and the second organic layer 120, so that the value range of the length L of the collimator is increased. Thus, under the same optical recognition accuracy, the value range of the diameter D of the collimator is increased, and the area of ​​the photosensitive element is increased, thereby improving the sensitivity of fingerprint recognition and improving the problem in the related art that the aperture of the collimating hole is too small, resulting in an area of ​​the fingerprint sensor being too small and having low sensitivity.

[0063] In one embodiment, a third opening 1272 is provided between at least two adjacent touch signal lines 1271. The third opening 1272 overlaps with the first opening 1171 and the second opening 1253 in the thickness direction of the photosensitive layer. The touch electrode comprises a ferrous metal material. It is understood that the third opening 1272, located between the first opening 1171 and the second opening 1253, can further enhance the confinement of incident light.

[0064] It is understandable that since the length L of the collimator in the present application is much greater than the length of the collimator in the related art, the present application can reduce the difficulty of the corresponding opening process by increasing the aperture of the first opening 1171 and / or the second opening 1253. For example, in some embodiments, the aperture of the first opening 1171 is larger than the aperture of the second opening 1253. In some embodiments, the aperture of the second opening 1253 is larger than the aperture of the first opening 1171. In some embodiments, the apertures of the first opening 1171, the second opening 1253, and the third opening 1272 are the same.

[0065] In one embodiment, the orthographic projections of the touch signal line 1271 and the touch sensor are within the boundary of the orthographic projection of the black matrix 1251 , that is, the touch signal line 1271 and the touch sensor are covered and blocked by the black matrix 1251 , which does not affect the user experience.

[0066] As shown in Figure 2, in one embodiment, the first planar layer includes a planar portion 122 and a first retaining wall 128. The planar portion 122 is located between the touch layer and the first organic layer 123, and a portion of the planar portion 122 fills the third opening 1272. The first retaining wall 128 is located on the first inorganic layer 118 and outside the first organic layer 123. As will be understood, since the first organic layer 123 easily flows during the manufacturing process, the first retaining wall 128 is provided to prevent the first organic layer 123 from overflowing during the manufacturing process. The first retaining wall 128 can be provided around the first organic layer 123, or other blocking methods can be selected as needed.

[0067] In one embodiment, the second retaining wall 119 can be formed during the PDL / PS process. The orthographic projection of the second retaining wall 119 on the first alignment layer is located outside the orthographic projection of the first retaining wall 128 on the first alignment layer. This arrangement allows the first retaining wall 128 and the second retaining wall 119 to confine the first organic layer 123 on both sides thereof.

[0068] In some embodiments, part of the first inorganic layer 118 and part of the second organic layer 120 are filled in the first opening 1171 , part of the second planar layer 124 is filled in the second opening 1253 , and part of the planar portion 122 is filled in the third opening 1272 .

[0069] In one embodiment, the display panel further includes a second flat layer 124 and a cover plate 126. The second flat layer 124 is located on the first organic layer 123 and the color filter layer, and the cover plate 126 is located on the second flat layer 124. By providing the second flat layer 124, the film layer structure in the aforementioned process can be flattened, so that the cover plate 126 can be more smoothly attached.

[0070] In some embodiments, a metal halide layer including, for example, LiF may be included between the cathode and the first inorganic layer 118. The metal halide layer may prevent the cathode from being damaged when the first inorganic layer 118 is formed by sputtering or plasma deposition.

[0071] In a second aspect, an embodiment of the present application further provides a display device, comprising the display panel described in any one of the above embodiments.

[0072] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this application, and all these changes or substitutions should fall within the scope of protection of the claims attached to this application.

Claims

1. A display panel, wherein: include: A photosensitive layer, including a photosensitive element; A first collimating layer, located on the photosensitive element, comprising a first opening; An encapsulation layer, located on the first alignment layer; A second collimating layer, located on the encapsulation layer, comprises a second opening, wherein the first opening, the second opening and the photosensitive element overlap in a thickness direction of the photosensitive layer; The display panel further includes a first organic layer located between the encapsulation layer and the second alignment layer, the encapsulation layer further includes a second organic layer, and the first organic layer and the second organic layer overlap with the first opening, the second opening and the photosensitive element in the thickness direction of the photosensitive layer.

2. The display panel according to claim 1, wherein: The first alignment layer is a pixel definition layer, the pixel definition layer is provided with a plurality of pixel openings and a plurality of the first openings, light emitting devices are provided in the pixel openings, and the pixel definition layer includes a black organic material.

3. The display panel according to claim 2, wherein: The second alignment layer is a color filter layer, which includes color resist and a black matrix. The black matrix is ​​further provided with a plurality of color resist openings and a plurality of the second openings, and the plurality of color resists are located in the color resist openings.

4. The display panel according to claim 3, wherein: The aperture of the first opening is larger than the aperture of the second opening.

5. The display panel according to claim 3, wherein: The aperture of the first opening is smaller than the aperture of the second opening.

6. The display panel according to claim 3, wherein: The display panel also includes a touch layer, which is located between the encapsulation layer and the first organic layer. The touch layer includes a plurality of touch signal lines. A third opening is provided between at least two adjacent touch signal lines. The third opening overlaps with the first opening and the second opening in the thickness direction of the photosensitive layer.

7. The display panel according to claim 6, wherein: The display panel further includes a first flat layer, wherein the first flat layer includes a flat portion and a first retaining wall; The flat portion is located between the touch layer and the first organic layer, and the first barrier wall is located on the pixel definition layer and outside the first organic layer.

8. The display panel according to claim 7, wherein: A portion of the flat portion fills the third opening.

9. The display panel according to claim 7, wherein: The encapsulation layer includes a first inorganic layer and a second inorganic layer, and the first inorganic layer, the second organic layer and the second inorganic layer are overlapped in sequence in the thickness direction of the photosensitive layer. The display panel also includes a plurality of second retaining walls, and the plurality of second retaining walls are located on the first inorganic layer. The second retaining walls are located on the outside of the second organic layer, and the orthographic projection of the second retaining wall on the pixel definition layer is located on the outside of the orthographic projection of the first retaining wall on the first collimating layer.

10. A display device comprising a display panel, wherein: The display panel comprises: A photosensitive layer, including a photosensitive element; A first collimating layer, located on the photosensitive element, comprising a first opening; An encapsulation layer, located on the first alignment layer; A second collimating layer, located on the encapsulation layer, comprises a second opening, wherein the first opening, the second opening and the photosensitive element overlap in a thickness direction of the photosensitive layer; The display panel further includes a first organic layer located between the encapsulation layer and the second alignment layer, the encapsulation layer further includes a second organic layer, and the first organic layer and the second organic layer overlap with the first opening, the second opening and the photosensitive element in the thickness direction of the photosensitive layer.

11. The display device according to claim 10, wherein: The first alignment layer is a pixel definition layer, the pixel definition layer is provided with a plurality of pixel openings and a plurality of the first openings, light emitting devices are provided in the pixel openings, and the pixel definition layer includes a black organic material.

12. The display device according to claim 11, wherein: The second alignment layer is a color filter layer, which includes color resist and a black matrix. The black matrix is ​​further provided with a plurality of color resist openings and a plurality of the second openings, and the plurality of color resists are located in the color resist openings.

13. The display device according to claim 12, wherein: The aperture of the first opening is larger than the aperture of the second opening.

14. The display device according to claim 12, wherein: The aperture of the first opening is smaller than the aperture of the second opening.

15. The display device according to claim 12, wherein: The display device also includes a touch layer, which is located between the encapsulation layer and the first organic layer. The touch layer includes a plurality of touch signal lines. A third opening is provided between at least two adjacent touch signal lines. The third opening overlaps with the first opening and the second opening in the thickness direction of the photosensitive layer.

16. The display device according to claim 15, wherein: The display device further includes a first flat layer, wherein the first flat layer includes a flat portion and a first retaining wall; The flat portion is located between the touch layer and the first organic layer, and the first retaining wall is located between the image layer and the first organic layer. The organic layer is on the element definition layer and is located outside the first organic layer.

17. The display device according to claim 16, wherein: A portion of the flat portion fills the third opening.

18. The display device according to claim 16, wherein: The encapsulation layer includes a first inorganic layer and a second inorganic layer, and the first inorganic layer, the second organic layer and the second inorganic layer overlap in sequence in the thickness direction of the photosensitive layer. The display device also includes a plurality of second retaining walls, and the plurality of second retaining walls are located on the first inorganic layer. The second retaining walls are located on the outside of the second organic layer, and the orthographic projection of the second retaining wall on the pixel definition layer is located outside the orthographic projection of the first retaining wall on the first collimating layer.

Images