Display panel and display device

Abstract

The display panel comprises a substrate, an isolation structure and a light-emitting functional layer, the isolation structure is arranged on one side of the substrate, a plurality of limiting openings are defined by the isolation structure, the isolation structure comprises a light-transmitting part with a transparent conducting layer, the light-emitting functional layer comprises a plurality of light-emitting parts with first electrodes, and the first electrodes are arranged on the light-emitting parts. The light-emitting parts are at least partially arranged in the limited openings, and the adjacent first electrodes are electrically connected through the transparent conductive layers, so that the light transmittance of the display panel can be improved while the first electrodes of the light-emitting parts are electrically connected with one another, and the display panel can meet the requirements of under-screen fingerprints, under-screen cameras and the like on the transmittance.

Description

Technical Field

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

[0002] With the development of display technology, OLED (Organic Light Emitting Diode) display panels have been listed as a promising next-generation display technology due to their advantages such as foldable displays, thinness, high contrast, and wide color gamut. However, current OLED display panels cannot meet the light transmittance requirements of under-display fingerprint sensors and under-display cameras. Summary of the Invention

[0003] This invention discloses a display panel and a display device to meet the transmittance requirements of under-display fingerprint sensors and under-display cameras.

[0004] In a first aspect, the present invention discloses a display panel, comprising a substrate; an isolation structure disposed on one side of the substrate, the isolation structure forming a plurality of defined openings, the isolation structure including a light-transmitting portion having a transparent conductive layer; and a light-emitting functional layer including a plurality of light-emitting portions having first electrodes, the light-emitting portions being at least partially disposed within the defined openings, adjacent first electrodes being electrically connected through the transparent conductive layer; the orthographic projection of the light-transmitting portion on the substrate is located between the orthographic projections of adjacent light-emitting portions on the substrate, and at least partially overlaps with the orthographic projections of adjacent light-emitting portions on the substrate.

[0005] Preferably, the light transmittance of the light-transmitting portion is greater than 30% in the visible light wavelength range.

[0006] Preferably, the light transmittance of the light-transmitting portion is greater than 50% in the visible light wavelength range.

[0007] Preferably, the light transmittance of the light-transmitting portion is greater than 60% in the visible light wavelength range.

[0008] Preferably, the light transmittance of the light-transmitting portion is greater than 70% in the visible light wavelength range.

[0009] Preferably, the light-transmitting portion includes a first light-transmitting portion and a second light-transmitting portion that are sequentially stacked along the thickness direction of the display panel. The first light-transmitting portion is disposed on one side of the substrate, and the second light-transmitting portion is disposed on the side of the first light-transmitting portion away from the substrate.

[0010] Preferably, the orthographic projection of the second light-transmitting portion on the substrate covers the orthographic projection of the first light-transmitting portion on the substrate.

[0011] Preferably, the sidewall of the second light-transmitting portion is recessed in a direction away from the light-emitting portion on the same side.

[0012] Preferably, the light-transmitting portion is reused as an isolation structure, and the light-transmitting portion forms a plurality of defined openings.

[0013] Preferably, both the first light-transmitting portion and the second light-transmitting portion include the transparent conductive layer; or, the first light-transmitting portion includes the transparent conductive layer, and the second light-transmitting portion includes at least one of a transparent organic layer and a transparent inorganic layer.

[0014] Preferably, the light-transmitting portion further includes a third light-transmitting portion, which is disposed on the side of the first light-transmitting portion adjacent to the substrate, and the orthographic projection of the first light-transmitting portion on the substrate is located within the orthographic projection of the third light-transmitting portion on the substrate.

[0015] Preferably, the third light-transmitting portion includes the transparent conductive layer.

[0016] Preferably, the display panel further includes a pixel definition layer; the pixel definition layer is located on the side of the isolation structure close to the substrate, the pixel definition layer has a plurality of pixel openings, the orthographic projection of the plurality of pixel openings on the substrate overlaps with the orthographic projection of the plurality of defined openings on the substrate, and the pixel openings expose at least a portion of the second electrode of the light-emitting portion.

[0017] Preferably, the display panel further includes an encapsulation layer; the encapsulation layer is located on the side of the isolation structure and the light-emitting functional layer opposite to the substrate.

[0018] Preferably, the encapsulation layer includes a first sub-encapsulation layer, a second sub-encapsulation layer, and a third sub-encapsulation layer stacked sequentially in a direction away from the substrate, wherein the first sub-encapsulation layer and the third sub-encapsulation layer are inorganic layers, and the second sub-encapsulation layer is an organic layer.

[0019] Preferably, the display panel further includes a touch electrode layer, which includes a plurality of touch electrodes, each of the touch electrodes having at least one touch opening that is offset from the defined opening, and the orthographic projection of the touch electrode on the substrate at least partially overlaps with the orthographic projection of the isolation structure on the substrate.

[0020] Preferably, the orthographic projection of the touch opening on the substrate at least partially overlaps with the orthographic projection of the light-transmitting portion on the substrate.

[0021] Preferably, the portion where the substrate and the light-transmitting portion overlap on the orthographic projection of the light-transmitting portion on the substrate includes the light-transmitting portion.

[0022] In a second aspect, the present invention discloses a display device comprising a display panel as described in any of the preceding claims.

[0023] The display panel and display device disclosed in this invention include a substrate, an isolation structure, and a light-emitting functional layer. The isolation structure is disposed on one side of the substrate and forms a plurality of defined openings. The isolation structure includes a light-transmitting portion having a transparent conductive layer. The light-emitting functional layer includes a plurality of light-emitting portions having first electrodes. The light-emitting portions are at least partially disposed within the defined openings. The orthographic projection of the light-transmitting portion on the substrate is located between the orthographic projections of adjacent light-emitting portions on the substrate and at least partially overlaps with the orthographic projections of adjacent light-emitting portions on the substrate. Adjacent first electrodes are electrically connected through the transparent conductive layer. This allows for the electrical connection of the first electrodes of each light-emitting portion while improving the light transmittance of the display panel, thereby enabling the display panel to meet the light transmittance requirements of under-display fingerprint sensors and under-display cameras. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the accompanying drawings used in the embodiments of the present invention or the background art will be described below.

[0025] Figure 1 This is a partial top view of a display panel disclosed in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the display panel along the cutting line AA'.

[0027] Figure 3 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0028] Figure 4 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0029] Figure 5 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0030] Figure 6 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0031] Figure 7 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0032] Figure 8 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0033] Figure 9This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0034] Figure 10 This is a schematic cross-sectional view of another display panel disclosed in an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the planar structure of a display device disclosed in an embodiment of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of a display device disclosed in an embodiment of the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] With the development of display technology, under-display technologies such as under-display cameras and under-display fingerprint scanners have emerged to increase screen-to-body ratio. Under-display technology involves placing the camera and fingerprint recognition device beneath the display panel. These devices collect images from the display panel by allowing light to pass through, enabling image capture or fingerprint recognition. However, the light transmittance of current OLED display panels needs further improvement to meet the transmittance requirements of under-display fingerprint scanners and cameras.

[0039] Based on this, the present invention discloses a display panel, which includes a substrate, an isolation structure, and a light-emitting functional layer. The isolation structure is disposed on one side of the substrate and forms a plurality of defined openings. The isolation structure includes a light-transmitting portion having a transparent conductive layer. The light-emitting functional layer includes a plurality of light-emitting portions having a first electrode. The light-emitting portions are at least partially disposed within the defined openings. Adjacent first electrodes are electrically connected through the transparent conductive layer, so as to improve the light transmittance of the display panel while realizing the electrical connection of the first electrodes of each light-emitting portion.

[0040] As an optional implementation of the disclosure of this invention, an embodiment of this invention discloses a display panel, such as... Figure 1 and Figure 2 As shown, Figure 1 This is a partial top view of a display panel disclosed in an embodiment of the present invention. Figure 2 for Figure 1The schematic diagram shown is a cross-sectional view of the display panel along the cutting line AA'. The display panel includes a substrate 10, an isolation structure 11 located on one side of the substrate 10, and a light-emitting functional layer. The isolation structure 11 includes a plurality of light-transmitting portions 110, and the light-emitting functional layer includes a plurality of light-emitting portions 12.

[0041] like Figure 1 As shown, the substrate 10 includes a display area AA and a non-display area NA. The non-display area NA at least partially surrounds the display area AA. The display area AA includes a plurality of sub-pixels arranged in an array. Each sub-pixel includes a light-emitting part 12. The light-emitting parts 12 of different sub-pixels can have different colors. For example, the light-emitting color of the light-emitting part 12 of one sub-pixel can be red, the light-emitting color of the light-emitting part 12 of another sub-pixel can be green, and the light-emitting color of the light-emitting part 12 of another sub-pixel can be blue.

[0042] like Figure 2 As shown, the isolation structure 11 is disposed on one side of the substrate 10. The isolation structure 11 forms a plurality of defined openings 111. The light-transmitting part 110 includes a transparent conductive layer 1101. Each light-emitting part 12 is at least partially disposed in one defined opening 111. The light-emitting part 12 includes a first electrode 121. Adjacent first electrodes 121 are electrically connected through the transparent conductive layer 1101. The light-transmitting portion 110 is located between adjacent light-emitting portions 12. The orthographic projection of the light-transmitting portion 110 on the substrate 10 at least partially overlaps with the orthographic projection of the adjacent light-emitting portion 12 on the substrate 10. In other words, the orthographic projection of the light-transmitting portion 110 on the substrate 10 is located between the orthographic projections of the adjacent light-emitting portions 12 on the substrate 10, and at least partially overlaps with the orthographic projection of the adjacent light-emitting portion 12 on the substrate 10. For example, the transparent conductive layer 1101 in the light-transmitting portion 110 at least partially overlaps with the first electrode 121 in the light-emitting portion 12. In other words, the orthographic projection of the transparent conductive layer 1101 in the light-transmitting portion 110 on the substrate 10 at least partially overlaps with the orthographic projection of the first electrode 121 in the light-emitting portion 12 on the substrate 10, so that the transparent conductive layer 1101 is electrically connected to the adjacent first electrode 121.

[0043] Preferably, the light transmittance of the light-transmitting portion 110 in the visible light wavelength range is greater than 30%; more preferably, the light transmittance of the light-transmitting portion 110 in the visible light wavelength range is greater than 50%; more preferably, the light transmittance of the light-transmitting portion 110 in the visible light wavelength range is greater than 60%; more preferably, the light transmittance of the light-transmitting portion 110 in the visible light wavelength range is greater than 70%, so that the display panel can meet the transmittance requirements of under-display fingerprint and under-display camera, etc.

[0044] Preferably, the material of the transparent conductive layer 1101 includes a transparent metal oxide, which includes at least one of ITO (indium tin oxide), IZO (indium zinc oxide), FTO (fluorine-doped tin dioxide), aluminum zinc oxide (AZO), silver-doped indium tin oxide, and silver-doped indium zinc oxide.

[0045] Preferably, the first electrode 121 is the cathode of the light-emitting part 12. By making the transparent conductive layer 1101 electrically connected to the cathode of the adjacent light-emitting part 12, the cathodes of each light-emitting part 12 can be electrically connected to each other, so that the cathode potential of each light-emitting part 12 is kept consistent, thereby improving the display effect of the display panel.

[0046] Although the isolation structure 11 may include a metal conductive layer and be electrically connected to the first electrode 121 through the metal conductive layer to realize the electrical connection of the first electrode 121 of each light-emitting part 12, the transmittance of the metal conductive layer is poor, which cannot meet the transmittance requirements of under-display fingerprint and under-display camera.

[0047] Based on this, the light-transmitting portion 110 of the isolation structure 11 in the embodiment of the present invention includes at least a transparent conductive layer 1101, so that light above the display panel passes through the transparent conductive layer 1101, that is, through the light-transmitting portion 110, and enters the lower or back side of the display panel. In this way, while realizing the electrical connection of the first electrode 121 of each light-emitting portion 12, the light transmittance of the display panel can be improved, so that the display panel meets the transmittance requirements of under-display fingerprint and under-display camera.

[0048] In this embodiment of the invention, the isolation structure 11 is used to isolate each light-emitting part 12. In other words, the isolation structure 11 is a mask for the light-emitting layer 122 forming multiple light-emitting parts 12. For example, a red light-emitting layer 122 can be deposited within multiple defined openings 111. Then, a portion of the red light-emitting layer 122 within the defined openings 111 is retained, while the red light-emitting layer 122 within other defined openings 111 is removed. After depositing a green light-emitting layer 122 within the other defined openings 111, a portion of the green light-emitting layer 122 within the defined openings 111 is retained, while the green light-emitting layer 122 within other defined openings 111 is removed. Finally, a blue light-emitting layer 122 is deposited within a portion of the defined openings 111. Based on this, a fine metal mask (FMM) is no longer needed to deposit the light-emitting layer 122, reducing process costs and enabling the fabrication of irregularly shaped sub-pixels.

[0049] In some embodiments, the isolation structure 11 may further isolate the first electrode 121 of each light-emitting part 12, making the first electrode 121 of each light-emitting part 12 a block electrode, so as to avoid affecting the light-emitting performance of the light-emitting part 12 due to etching of the first electrode 121. Of course, the present invention is not limited to this. In other embodiments, the first electrode 121 of each light-emitting part 12 may also be a grid-shaped electrode formed by a mask plate, and the orthographic projection of the mesh on the substrate 10 covers the orthographic projection of the light-transmitting part 110 on the substrate 10, so as to further improve the light transmittance of the display panel.

[0050] Preferably, the height of the isolation structure 11 in the direction perpendicular to the substrate 10 is greater than the sum of the heights of the light-emitting part 12 and the first electrode 121 in the direction perpendicular to the substrate 10, so that the isolation structure 11 can isolate each light-emitting layer 122 and the first electrode 121.

[0051] In some embodiments of the present invention, such as Figure 2 As shown, the light-emitting part 12 includes a second electrode 123, a light-emitting layer 122 and a first electrode 121 stacked sequentially on the substrate 10. The first electrode 121 can be a cathode and the second electrode 123 can be an anode.

[0052] In some embodiments, the first electrode 121, such as a cathode, can be a transparent electrode. The material of the transparent electrode includes transparent metal oxides, such as at least one of indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), FTO, silver-doped indium tin oxide, and silver-doped indium zinc oxide. Alternatively, a three-layer structure can be adopted, wherein the materials of the first and third layers can be transparent metal oxides, such as indium tin oxide (ITO), indium zinc oxide (IZO), or aluminum zinc oxide (AZO), and the material of the middle second layer can be a metal, such as silver or copper. The second electrode 123 can be a metal electrode or a transparent electrode. The metal electrode material can be silver, copper, or a magnesium-silver alloy. The first light-emitting layer 22 can be an organic light-emitting layer. The organic light-emitting layer can include only a single-layer structure, such as only an organic light-emitting material layer; or it can include a multi-layer structure, such as a hole injection layer, a hole transport layer, an organic light-emitting material layer, an electron transport layer, and an electron injection layer sequentially arranged from the first electrode 21 to the second electrode 23. The specific structure of the organic light-emitting layer is set according to the actual application and is not specifically limited here. Optionally, the isolation structure 11 can make the functional film layers of each light-emitting part 12 insulated from each other, so as to reduce the lateral crosstalk between each light-emitting part 12.

[0053] Furthermore, the substrate 10 also has a driving array layer 20 on the side facing the light-emitting portion 12. The driving array layer 20 includes a driving transistor T. The source of the driving transistor T receives a data driving signal, and the drain of the driving transistor T is electrically connected to the second electrode 123. After the gate of the driving transistor T receives a gate scan signal, the source and drain of the driving transistor T are turned on. The source transmits the data driving signal to the second electrode 123 through the drain, so that the light-emitting layer 122 emits light through the voltage difference between the second electrode 123 and the first electrode 121. Of course, the driving array layer 20 also includes other transistors and capacitors to realize the transmission of signals to the driving transistor T, etc.

[0054] In some embodiments of the present invention, the area of ​​the orthogonal projection of the light-transmitting portion 110 onto the substrate 10 is smaller than the area of ​​the orthogonal projection of the light-emitting portion 12 onto the substrate 10. However, the present invention is not limited to this. In other embodiments, while maintaining the same pixel resolution, the light transmittance of the display panel can be improved by increasing the area of ​​the orthogonal projection of the light-transmitting portion 110 onto the substrate 10, such as making the area of ​​the orthogonal projection of the light-transmitting portion 110 onto the substrate 10 greater than or equal to the area of ​​the orthogonal projection of the light-emitting portion 12 onto the substrate 10.

[0055] In some embodiments of the present invention, such as Figure 2 As shown, the orthogonal projection of the second electrode 123, such as the anode, on the substrate 10 at least partially covers the orthogonal projection of the driving transistor T on the substrate 10, or the orthogonal projection of the light-transmitting portion 110 on the substrate 10 at least partially does not cover the orthogonal projection of the driving transistor T on the substrate 10, so as to prevent light from shining on the driving transistor T through the reflection effect of the second electrode 123, such as the anode, and further prevent the driving transistor T from affecting the light transmittance of the light-transmitting portion 110.

[0056] In some embodiments of the present invention, such as Figure 2 As shown, the light-transmitting portion 110 includes a first light-transmitting portion 1102 and a second light-transmitting portion 1103 that are sequentially stacked along the thickness direction of the display panel. The first light-transmitting portion 1102 is disposed on one side of the substrate 10, and the second light-transmitting portion 1103 is disposed on the side of the first light-transmitting portion 1102 that is away from the substrate 10.

[0057] Preferably, the orthographic projection of the second light-transmitting portion 1103 on the substrate 10 covers the orthographic projection of the first light-transmitting portion 1102 on the substrate 10. That is, in the direction close to the substrate 10, the width of the second light-transmitting portion 1103 is greater than the width of the first light-transmitting portion 1102, so that the light-transmitting portion 110 has a shape that is wider at the top and narrower at the bottom, so that the light-transmitting portion 110 can better play the role of blocking the light-emitting layer 122 of each light-emitting portion 12.

[0058] In some embodiments, such as Figure 2As shown, in the direction near the substrate 10, the width of the second light-transmitting portion 1103 gradually decreases, while the width of the first light-transmitting portion 1102 gradually increases, and the maximum width of the second light-transmitting portion 1103 is greater than the maximum width of the first light-transmitting portion 1102. It can be understood that when the width of the second light-transmitting portion 1103 gradually decreases, the orthographic projection of the first light-transmitting portion 1102 on the substrate 10 can also cover the orthographic projection of the second light-transmitting portion 1103 on the substrate 10. In other words, the maximum width of the second light-transmitting portion 1103 can also be less than the maximum width of the first light-transmitting portion 1102. In this case, the light-transmitting portion 110 can also function as a barrier between the light-emitting layers 122 of each light-emitting portion 12.

[0059] In other embodiments, such as Figure 3 As shown, Figure 3 This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. The widths of the second light-transmitting part 1103 and the first light-transmitting part 1102 can also gradually decrease, as long as the maximum width of the second light-transmitting part 1103 is greater than the maximum width of the first light-transmitting part 1102.

[0060] In other embodiments, such as Figure 4 As shown, Figure 4 This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. The widths of the second light-transmitting portion 1103 and the first light-transmitting portion 1102 can also gradually increase, which will not be described in detail here.

[0061] In some embodiments of the present invention, such as Figures 2 to 4 As shown, both the second light-transmitting portion 1103 and the first light-transmitting portion 1102 can include a transparent conductive layer 1101, meaning both are transparent conductive layers 1101. Both the second light-transmitting portion 1103 and the first light-transmitting portion 1102 can achieve electrical connection between adjacent first electrodes 121. The second light-transmitting portion 1103 and the first light-transmitting portion 1102 can be transparent conductive layers 1101 made of the same material, or they can be transparent conductive layers 1101 made of different materials.

[0062] However, the present invention is not limited thereto; in other embodiments, such as Figure 5 As shown, Figure 5 This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. Only the first light-transmitting portion 1102 includes a transparent conductive layer 1101, and the second light-transmitting portion 1103 includes at least one of a transparent inorganic layer and a transparent organic layer. That is, only the first light-transmitting portion 1102 or the transparent conductive layer 1101 realizes the electrical connection between adjacent first electrodes 121, and the material of the second light-transmitting portion 1103 is an insulating material, so it cannot realize the electrical connection between adjacent first electrodes 121.

[0063] Preferably, in the direction close to the substrate 10, the width of the second light-transmitting portion 1103 first gradually decreases and then gradually increases, or in other words, the sidewall of the second light-transmitting portion 1103 is recessed in the direction away from the light-emitting portion on the same side, the width of the first light-transmitting portion 1102 gradually increases, and the maximum width of the second light-transmitting portion 1103 is greater than the maximum width of the first light-transmitting portion 1102.

[0064] Preferably, the material of the transparent organic layer includes acrylic materials, and the material of the transparent inorganic layer includes at least one of silicon oxide and silicon nitride. It is understood that in this embodiment, the shapes of the second light-transmitting portion 1103 and the first light-transmitting portion 1102 may also be as shown in Figure 3 or... Figure 4 As shown, it will not be elaborated further here.

[0065] In other embodiments, such as Figure 6 As shown, Figure 6 This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. The light-transmitting part 110 further includes a third light-transmitting part 1104. The third light-transmitting part 1104 is disposed on the side of the first light-transmitting part 1102 adjacent to the substrate 10. The orthogonal projection of the third light-transmitting part 1104 on the substrate 10 covers the orthogonal projection of the first light-transmitting part 1102 on the substrate 10.

[0066] Preferably, the third light-transmitting portion 1104 includes a transparent conductive layer 1101. Specifically, the transparent conductive layer 1101 is located between the first light-transmitting portion 1102 and the substrate 10, and the first light-transmitting portion 1102 and the second light-transmitting portion 1103 include at least one of a transparent organic layer and a transparent inorganic layer.

[0067] In other words, only the transparent conductive layer 1101 enables electrical connection between adjacent first electrodes 121. The materials of the first light-transmitting portion 1102 and the second light-transmitting portion 1103 are both insulating materials, and therefore, electrical connection between adjacent first electrodes 121 cannot be achieved. Specifically, the first light-transmitting portion 1102 includes at least one of a transparent organic layer and a transparent inorganic layer, and the second light-transmitting portion 1103 also includes at least one of a transparent organic layer and a transparent inorganic layer. Preferably, the material of the transparent organic layer includes acrylic materials, and the material of the transparent inorganic layer includes at least one of silicon oxide and silicon nitride.

[0068] In some embodiments, such as Figure 2 or Figure 3 or Figure 6 As shown, the first light-transmitting portion 1102 and the second light-transmitting portion 1103 can be film layers made of the same material. After forming a film layer, a photoresist layer can be formed on the side of the film layer facing away from the substrate 10, and the film layer is etched using an ashing process to form the film layer. Figure 6 The second light-transmitting part 1103 and the first light-transmitting part 1102 are shown as an integral structure.

[0069] Of course, the present invention is not limited thereto; in other embodiments, such as Figure 7 As shown, Figure 7 This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. The first light-transmitting portion 1102 and the second light-transmitting portion 1103 can also be two film layers made of different materials. After forming the first light-transmitting portion 1102 and the second light-transmitting portion 1103, a photoresist layer can be formed on the side of the second light-transmitting portion 1103 facing away from the substrate 10. The two film layers are then etched using the photoresist layer as a mask. Since the etching rates of the two film layers are different, a [missing information - likely a specific structure or feature] can be formed. Figure 7 The second light-transmitting part 1103 and the first light-transmitting part 1102 are shown.

[0070] In some embodiments, such as Figure 6 and Figure 7 As shown, the orthographic projection of the transparent conductive layer 1101 on the substrate 10 covers the orthographic projection of the first light-transmitting portion 1102 on the substrate 10. Preferably, in the direction close to the substrate 10, the width of the transparent conductive layer 1101 is greater than the width of the first light-transmitting portion 1102, so that the first light-transmitting portion 1102 exposes part of the transparent conductive layer 1101, so that the first electrode 121 can extend from the sidewall of the transparent conductive layer 1101 to its side surface away from the substrate 10, thereby making the contact area between the first electrode 121 and the transparent conductive layer 1101 larger, thereby enhancing the electrical connection effect between the first electrode 121 and the transparent conductive layer 1101.

[0071] Of course, the present invention is not limited thereto; in other embodiments, such as Figures 2 to 5 As shown, the first light-transmitting portion 1102 may not expose the side surface of the transparent conductive layer 1101 away from the substrate 10, and the first electrode 121 may be electrically connected to the transparent conductive layer 1101 only through the sidewall of the transparent conductive layer 1101.

[0072] In some embodiments, such as Figure 6 As shown, in the direction close to the substrate 10, the width of the second light-transmitting portion 1103 gradually decreases, and the width of the first light-transmitting portion 1102 gradually increases, so that the isolation structure 11 can better serve to isolate the light-emitting layer 122 of each light-emitting portion 12.

[0073] Of course, the present invention is not limited thereto; in other embodiments, such as Figure 7 As shown, Figure 7This is a cross-sectional view of another display panel disclosed in an embodiment of the present invention. In the direction near the substrate 10, the widths of both the second light-transmitting portion 1103 and the first light-transmitting portion 1102 gradually increase, which similarly serves to block the light-emitting layer 122 of each light-emitting portion 12. In other embodiments, the widths of both the second light-transmitting portion 1103 and the first light-transmitting portion 1102 may gradually decrease in the direction near the substrate 10, which will not be elaborated further here.

[0074] It is understood that both the second light-transmitting portion 1103 and the first light-transmitting portion 1102 may include one, two, or even more film layers, which will not be elaborated further here. The thickness of the second light-transmitting portion 1103 and the first light-transmitting portion 1102 can be specifically set according to the actual application, as long as the second light-transmitting portion 1103 and the first light-transmitting portion 1102 can meet the light transmittance requirements while achieving the isolation effect.

[0075] It is also understandable that, while ensuring that the transparent conductive layer 1101 can be electrically connected to the first electrode 121, the second light-transmitting part 1103 may include the transparent conductive layer 1101, and the first light-transmitting part 1102 may include at least one of a transparent organic layer and a transparent inorganic layer.

[0076] In some embodiments of the present invention, such as Figures 2 to 7 As shown, the light-transmitting portion 110 is entirely reused as the isolation structure 11. That is, the light-transmitting portion 110 forms a plurality of defined openings 111, or in other words, the isolation structures 11 between adjacent light-emitting portions 12 are all light-transmitting portions 110. However, the present invention is not limited thereto. In other embodiments, such as Figure 8 As shown, Figure 8 This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. The isolation structure 11 further includes a non-transparent portion 112, which partially surrounds the transparent portion 110.

[0077] In some embodiments, the non-transparent portion 112 only surrounds the first light-transmitting portion 1102 and the second light-transmitting portion 1103, and does not surround the transparent conductive layer 1101 in the third light-transmitting portion 1104, so that the transparent conductive layer 1101 can be electrically connected to the first electrode 121. Of course, the present invention is not limited to this. In other embodiments, the non-transparent portion 112 only surrounds part of the sidewalls of the light-transmitting portion 110, such as the first light-transmitting portion 1102, the second light-transmitting portion 1103 and the third light-transmitting portion 1104, so that the exposed sidewalls can enable the transparent conductive layer 1101 to be electrically connected to the first electrode 121.

[0078] In some embodiments of the present invention, such as Figure 8As shown, the display panel also includes a pixel definition layer 30, which is located between the isolation structure 11 and the substrate 10. The pixel definition layer 30 has multiple pixel openings, and the orthographic projections of the multiple pixel openings 301 on the substrate 10 overlap with the orthographic projections of the multiple defining openings 111 on the substrate 10. The pixel openings 301 expose at least a portion of the second electrode 123 of the light-emitting portion 12, and the light-emitting layer 122 extends from the defining openings 111 to the top of the second electrode 123 exposed by the pixel openings 301. Preferably, the defining openings 111 and the pixel openings 301 have the same shape, which can be a regular shape such as square, circular, or trapezoidal, or an irregular shape such as a comb-like shape.

[0079] Preferably, the height of the pixel opening 301 in the direction perpendicular to the substrate 10 is less than or equal to the sum of the heights of the light-emitting layer 122 and the first electrode 121 in the direction perpendicular to the substrate 10, so that the first electrode 121 can extend to the sidewall of the light-transmitting conductive layer 1101 and be electrically connected to the light-transmitting conductive layer 1101.

[0080] Preferably, the sum of the heights of the pixel opening 301 and the defining opening 111 in the direction perpendicular to the substrate 10 is greater than the sum of the heights of the light-emitting layer 122 and the first electrode 121 in the direction perpendicular to the substrate 10, so that the light-transmitting portion 110 can function as a barrier between the light-emitting layer 122 and the first electrode 121. Preferably, the height range of the defining opening 111 in the direction perpendicular to the substrate 10 is 1 μm to 2 μm.

[0081] Preferably, the portion where the orthographic projections of the substrate 10 and the light-transmitting portion 110 overlap on the substrate 10 also includes the light-transmitting portion. For example, such as... Figure 8 As shown, the second electrode 123 and the substrate 10 also have a planarization layer 201, an interlayer insulating layer 202, and a gate insulating layer 203. The portion of the pixel definition layer 30, planarization layer 201, interlayer insulating layer 202, and gate insulating layer 203 that overlaps with the orthogonal projection of the light-transmitting portion 110 on the substrate 10 also includes a light-transmitting portion. Specifically, the pixel definition layer 30, planarization layer 201, interlayer insulating layer 202, and gate insulating layer 203 can also be made of transparent materials. This transparent material can be one of transparent organic materials and transparent inorganic materials to further improve the transmittance of the display panel. In addition, the substrate 10 can be a glass substrate, a silicon substrate, or a flexible polyimide (PI) substrate with high light transmittance. It is understood that the display panel in the embodiments of the present invention can be a rigid display panel that cannot be bent, or a flexible display panel that can be bent.

[0082] In some embodiments of the present invention, such as Figure 9 As shown, Figure 9This is a cross-sectional structural diagram of another display panel disclosed in an embodiment of the present invention. The display panel further includes an encapsulation layer 40. The encapsulation layer 40 is located on the side of the isolation structure 11 and the light-emitting part 12 away from the substrate 10. The encapsulation layer 40 wraps the sidewall of the isolation structure 11 and the light-emitting part 12 extending to the sidewall, so as to realize the independent encapsulation of each light-emitting part 12.

[0083] Preferably, the encapsulation layer 40 includes a transparent organic layer and / or a transparent inorganic layer to further improve the transmittance of the display panel. Preferably, the encapsulation layer 40 includes a first sub-encapsulation layer 401, a second sub-encapsulation layer 402, and a third sub-encapsulation layer 403 sequentially stacked in a direction away from the substrate 10, wherein the first sub-encapsulation layer 401 and the third sub-encapsulation layer 403 are transparent inorganic layers, and the second sub-encapsulation layer 402 is a transparent organic layer. Of course, the present invention is not limited thereto; in other embodiments, the encapsulation layer 40 may also include two, four, or even more sub-encapsulation layers, which will not be elaborated here.

[0084] In some embodiments of the present invention, such as Figure 10 As shown, Figure 10 This is a cross-sectional view of another display panel disclosed in an embodiment of the present invention. The display panel further includes a touch electrode layer 50, which includes a plurality of touch electrodes 501. Each touch electrode 501 has at least one touch opening 502 that is offset from the defining opening 111. That is, the orthographic projection of the touch opening 502 on the substrate 10 does not overlap with the orthographic projection of the defining opening 111 on the substrate 10. Of course, in some embodiments, the orthographic projection of the gap between the touch electrodes 501 on the substrate 10 may at least partially overlap with the orthographic projection of the defining opening 111 on the substrate 10, which will not be elaborated here. Preferably, the touch electrode 501 has a plurality of touch openings 502, that is, the touch electrode 501 is a grid-shaped electrode.

[0085] like Figure 10 As shown, the orthographic projection of the touch electrode 501 on the substrate 10 at least partially overlaps with the orthographic projection of the isolation structure 11 on the substrate 10. Preferably, the orthographic projection of the touch opening 502 on the substrate 10 at least partially overlaps with the orthographic projection of the light-transmitting portion 110 on the substrate 10, so as to further improve the light transmittance of the display panel.

[0086] Preferably, the touch electrode 501 is made of a transparent conductive material, including at least one of ITO (indium tin oxide), IZO (indium zinc oxide), and FTO. Preferably, the touch opening 502 has the same shape as the defining opening 111 and the pixel opening 301, and can be square, circular, trapezoidal, etc.

[0087] In some embodiments, a plurality of touch electrodes 501 are arranged in an array, and the touch electrodes 501 realize touch function through self-capacitance. Of course, the present invention is not limited to this. In other embodiments, the touch electrode 501 includes a first touch electrode extending along a first direction and a second touch electrode extending along a second direction, the first direction and the second direction intersect, and an insulating layer is provided between the first touch electrode and the second touch electrode so that the first touch electrode and the second touch electrode realize touch function through mutual capacitance.

[0088] It is understandable that the side of the touch electrode layer 50 facing away from the substrate 10 may also have a polarizer and a transparent cover, etc., which will not be described in detail here.

[0089] As an optional implementation of the disclosure of this invention, an embodiment of this invention discloses a display device, which includes a display panel as disclosed in any of the above embodiments. In some embodiments of this invention, such as Figure 11 As shown, Figure 11 This is a schematic diagram of a planar structure of a display device disclosed in an embodiment of the present invention. The display device includes, but is not limited to, smartphones, tablet computers, and digital cameras. It is understood that this embodiment of the present invention is only described with the non-display area located around the display area as an example; however, the present invention is not limited to this, and in other embodiments, the non-display area may be located only on one or both sides of the display area.

[0090] like Figure 12 As shown, Figure 12 This is a cross-sectional structural diagram of a display device disclosed in an embodiment of the present invention. The display device also includes optical components disposed below the display panel. The display panel is the display panel disclosed in any of the above embodiments. The isolation structure 11 of the display panel includes a light-transmitting portion 110 located between a plurality of light-emitting portions 12, so as to increase the light transmittance of the display panel through the light-transmitting portion 110. The optical components include cameras and fingerprint recognition devices, etc., and are disposed in the display area of ​​the display panel, that is, the optical components are disposed below the light-transmitting portion 110 to receive more light penetrating the display panel. In practical applications, light will undergo refraction when passing through the various film layers of the display panel, which is not shown in the accompanying drawings. Of course, the present invention is not limited to this. In other embodiments, the display device can also be a transparent display device or other device with high light transmittance requirements.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above embodiments are merely illustrative of several implementation methods described in detail, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this specification, and these all fall within the protection scope of this specification. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; An isolation structure, the isolation structure is disposed on one side of the substrate, the isolation structure encloses a plurality of defined openings, and the isolation structure includes a light-transmitting portion having a transparent conductive layer; a light-emitting functional layer, the light-emitting functional layer comprising a plurality of light-emitting portions having first electrodes, the light-emitting portions being at least partially disposed within the defined openings, and adjacent first electrodes being electrically connected via the transparent conductive layer; The orthographic projection of the light-transmitting portion on the substrate is located between the orthographic projections of the adjacent light-emitting portions on the substrate, and at least partially overlaps with the orthographic projections of the adjacent light-emitting portions on the substrate.

2. The display panel according to claim 1, characterized in that: The light transmittance of the light-transmitting portion within the visible light wavelength range is greater than 30%; preferably, the light transmittance of the light-transmitting portion within the visible light wavelength range is greater than 50%; preferably, the light transmittance of the light-transmitting portion within the visible light wavelength range is greater than 60%; preferably, the light transmittance of the light-transmitting portion within the visible light wavelength range is greater than 70%.

3. The display panel according to claim 1, characterized in that: The light-transmitting portion comprises a first light-transmitting portion and a second light-transmitting portion which are sequentially stacked along the thickness direction of the display panel, wherein the first light-transmitting portion is arranged on one side of the substrate, and the second light-transmitting portion is arranged on a side of the first light-transmitting portion away from the substrate; Preferably, the orthographic projection of the second light-transmitting portion on the substrate covers the orthographic projection of the first light-transmitting portion on the substrate; Preferably, the side wall of the second light-transmitting portion is recessed in a direction away from the light-emitting portion on the same side thereof; Preferably, the light-transmitting portion is reused as an isolation structure as a whole, and the light-transmitting portion surrounds a plurality of defined openings.

4. The display panel according to claim 3, characterized in that: The first light-transmitting portion and the second light-transmitting portion both include the transparent conductive layer; or, The first light-transmitting portion includes the transparent conductive layer, and the second light-transmitting portion includes at least one of a transparent organic layer and a transparent inorganic layer.

5. The display panel according to claim 3, characterized in that: The light-transmitting portion further includes a third light-transmitting portion, which is disposed on a side of the first light-transmitting portion adjacent to the substrate, and an orthographic projection of the first light-transmitting portion on the substrate is located within an orthographic projection of the third light-transmitting portion on the substrate.

6. The display panel according to claim 5, characterized in that: The third light-transmitting portion includes the transparent conductive layer.

7. The display panel according to claim 1, characterized in that: The display panel also includes a pixel definition layer; the pixel definition layer is located on a side of the isolation structure close to the substrate, the pixel definition layer has a plurality of pixel openings, the orthographic projections of the plurality of pixel openings on the substrate overlap with the orthographic projections of the plurality of limiting openings on the substrate, respectively, and the pixel openings expose at least a portion of the second electrode of the light-emitting portion.

8. The display panel according to claim 1, characterized in that: The display panel further comprises an encapsulation layer; the encapsulation layer is located on a side of the isolation structure and the light-emitting portion away from the substrate; Preferably, the encapsulation layer comprises a first sub-encapsulation layer, a second sub-encapsulation layer and a third sub-encapsulation layer which are sequentially stacked in a direction away from the substrate, the first sub-encapsulation layer and the third sub-encapsulation layer are inorganic layers, and the second sub-encapsulation layer is an organic layer.

9. The display panel according to claim 1, characterized in that: The display panel further includes a touch electrode layer, the touch electrode layer includes a plurality of touch electrodes, each of the touch electrodes has at least one touch opening that is offset from the limiting opening, and an orthographic projection of the touch electrode on the substrate at least partially overlaps with an orthographic projection of the isolation structure on the substrate; Preferably, the orthographic projection of the touch opening on the substrate at least partially overlaps with the orthographic projection of the light-transmitting portion on the substrate; Preferably, the portion where the substrate and the orthographic projection of the light-transmitting portion on the substrate overlap includes a light-transmitting portion.

10. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 9.

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