Display panel and display device

Abstract

The application provides a display panel, which comprises a substrate, a pixel unit and an encapsulation layer, and the pixel unit and the encapsulation layer are sequentially stacked on the substrate; the pixel unit comprises a plurality of light emitting devices; the light emitting device comprises an anode, a light emitting functional layer and a cathode, and the anode, the light emitting functional layer and the cathode are sequentially stacked in a direction away from the substrate; the light emitting device has an effective light emitting area and a peripheral edge area, the peripheral edge area is arranged around the periphery of the effective light emitting area, and the effective light emitting area is connected with the peripheral edge area; the encapsulation layer comprises a first sub-layer; at least a part of the peripheral edge area of the light emitting device is protruded in a direction away from the substrate or is recessed in a direction close to the substrate, so that a region corresponding to the protrusion of the first sub-layer is protruded or a region corresponding to the recess is recessed, so that the region of the first sub-layer corresponding to the pixel unit forms a convex lens or a concave lens. The display panel has improved light emitting brightness, brightness uniformity and service life.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of display, and particularly relates to a display panel and a display device. BACKGROUND

[0002] Micro-OLED (Organic Light-Emitting Diode) display panel is a new type of OLED display panel with a silicon substrate as a substrate. The silicon-based OLED display panel has the characteristics of small size and high resolution. The silicon-based OLED display panel is made of mature integrated circuit CMOS process, realizes active addressing of pixels, and realizes lightweight of the OLED display panel. The micro-OLED display panel is widely used in near-eye display, virtual reality (VR) display, augmented reality (AR) display and other display fields.

[0003] The micro-OLED display panel is applied to a near-eye display device. The fixed position of the display panel is very important to the user and determines the user experience. On the one hand, the current silicon-based OLED display panel is applied in AR / VR display. Since the user will be in different environments, the high life requirement of the OLED device is crucial. On the other hand, in order to improve the display effect of the silicon-based OLED display panel, high brightness and high brightness uniformity have a decisive influence on the display. The high brightness uniformity requires that the anode of the OLED device has good flatness. SUMMARY

[0004] The application provides a display panel, which can realize high life, high brightness and high brightness uniformity for the above-mentioned silicon-based OLED display panel. The display panel comprises a substrate, a pixel unit and an encapsulation layer, wherein the pixel unit and the encapsulation layer are sequentially stacked on the substrate.

[0005] The pixel unit comprises a plurality of light-emitting devices; the light-emitting device comprises an anode, a light-emitting functional layer and a cathode, which are sequentially stacked in a direction away from the substrate.

[0006] The light-emitting device has an effective light-emitting area and a peripheral edge area, the peripheral edge area is arranged around the periphery of the effective light-emitting area, and the effective light-emitting area is connected with the peripheral edge area.

[0007] The encapsulation layer comprises a first sub-layer.

[0008] At least a part of the four peripheral edge regions of the light emitting device is protruded away from the substrate or is recessed towards the substrate, and a region of the first sub-layer corresponding to the protrusion is protruded or a region corresponding to the recess is recessed, so that a region of the first sub-layer corresponding to the pixel unit forms a convex lens or a concave lens.

[0009] Optionally, a normal projection of the convex lens or the concave lens on the substrate at least overlaps with 1 / 3 area of the pixel unit.

[0010] Optionally, the substrate comprises a pixel driving circuit, and an insulating layer is arranged between the pixel driving circuit and the anode, and a plurality of vias are arranged in the insulating layer;

[0011] A normal projection of the plurality of vias on the substrate is located in the four peripheral edge regions of the light emitting device.

[0012] A conductive structure is arranged in the via.

[0013] The anodes of a plurality of the light emitting devices are connected to the pixel driving circuit through the conductive structures in different vias, respectively.

[0014] An end of the conductive structure away from the substrate protrudes from the insulating layer.

[0015] Optionally, a pixel defining layer is further arranged on a side of the anode away from the substrate and a side of the light emitting functional layer close to the substrate,

[0016] The anodes of any adjacent light emitting devices are spaced apart from each other.

[0017] The pixel defining layer comprises a first part and a second part, and the first part and the second part are connected as a whole.

[0018] The first part is arranged around the four peripheral edges of the anode, and a normal projection of the first part on the substrate overlaps with a normal projection of the four peripheral edge regions of the light emitting device on the substrate.

[0019] A normal projection of the second part on the substrate covers a spacing region between the anodes of adjacent light emitting devices.

[0020] A side surface of the first part away from the substrate is higher than a side surface of the second part away from the substrate.

[0021] Optionally, the substrate comprises a pixel driving circuit, and an insulating layer is arranged between the pixel driving circuit and the anode, and a plurality of vias are arranged in the insulating layer;

[0022] The orthographic projection of the plurality of via holes on the substrate is located in the four peripheral edge regions of the light emitting device;

[0023] The via hole is provided with a conductive structure;

[0024] The anodes of a plurality of the light emitting devices are connected to the pixel driving circuit through the conductive structures in different via holes, respectively;

[0025] An end of the conductive structure away from the substrate is located in the insulating layer, and a side surface of the conductive structure away from the substrate is lower than a side surface of the insulating layer away from the substrate.

[0026] Optionally, the encapsulation layer further comprises a second sub-layer located on a side of the first sub-layer away from the substrate;

[0027] The refractive index of the second sub-layer is less than the refractive index of the first sub-layer;

[0028] A side surface of the second sub-layer away from the substrate is a plane;

[0029] Alternatively, the encapsulation layer further comprises a third sub-layer located on a side of the second sub-layer away from the substrate;

[0030] The refractive index of the third sub-layer is less than the refractive index of the second sub-layer.

[0031] Optionally, the encapsulation layer further comprises a second sub-layer located on a side of the first sub-layer away from the substrate;

[0032] The refractive index of the second sub-layer is greater than the refractive index of the first sub-layer;

[0033] A side surface of the second sub-layer away from the substrate is a plane;

[0034] Alternatively, the encapsulation layer further comprises a third sub-layer located on a side of the second sub-layer away from the substrate;

[0035] The refractive index of the third sub-layer is greater than the refractive index of the second sub-layer.

[0036] Optionally, it further comprises a color filter layer, the color filter layer comprises a plurality of color resistors of different colors, and the plurality of color resistors of different colors one-to-one correspond to the plurality of light emitting devices, respectively;

[0037] The color filter layer is located on a side of the first sub-layer away from the substrate and a side of the second sub-layer close to the substrate;

[0038] The shape of the color filter layer is adapted to the shape of the first sub-layer;

[0039] Alternatively, the color filter layer is located on a side of the second sub-layer away from the substrate.

[0040] Optionally, the anode of the light emitting device comprises a connection region, a normal projection of the connection region on the substrate is located in the peripheral edge region of the light emitting device.

[0041] A normal projection of the via on the anode is located in the connection region.

[0042] The pixel unit comprises a first light emitting device, a second light emitting device and a third light emitting device, the first light emitting device, the second light emitting device and the third light emitting device are arranged in a triangle shape.

[0043] The anode connection region of the first light emitting device, the anode connection region of the second light emitting device and the anode connection region of the third light emitting device are arranged along a straight line direction.

[0044] The straight line overlaps with a normal projection of the triangle on the substrate, and the straight line is parallel to one side of the triangle.

[0045] Optionally, the straight line passes through the center of the triangle.

[0046] Optionally, the anodes of the first light emitting device, the second light emitting device and the third light emitting device have the same shape in a normal projection on the substrate.

[0047] The shape of the effective light emitting region of the anode comprises a regular hexagon.

[0048] The shape of the connection region of the anode comprises a rectangle.

[0049] Optionally, a height of the conductive structure protruding from the insulating layer is 2-3 times of the thickness of the anode.

[0050] Optionally, a thickness of the pixel defining layer is 3-5 times of the thickness of the anode.

[0051] Optionally, a height difference between a side surface of the conductive structure away from the substrate and a side surface of the insulating layer away from the substrate is 1-3 times of the thickness of the anode.

[0052] Optionally, a material of the first sub-layer comprises silicon nitride, and a material of the second sub-layer comprises silicon oxide.

[0053] The application further provides a display device comprising the display panel.

[0054] The display panel provided by the present application has the following beneficial effects: the display panel is provided with a convex lens or a concave lens in the region corresponding to the pixel unit of the first sub-layer, which can improve the normal viewing angle brightness of the pixel unit, thereby improving the light emitting brightness of the pixel unit and the light emitting brightness of the display panel; on the basis of improving the light emitting brightness of the pixel unit by the convex lens or the concave lens, the driving current of the light emitting device in the pixel unit can be relatively reduced, thereby improving the service life of the display panel; in addition, the flatness of the effective light emitting region of the light emitting device can be ensured, thereby improving the uniformity of the light emitting brightness of the light emitting device and the brightness uniformity of the display panel.

[0055] The display device provided by the present application has the following beneficial effects: the display panel in the above-mentioned embodiments is adopted, so that the display brightness and the display brightness uniformity of the display device are improved, and the service life of the display device is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 It is a top view schematic diagram of the pixel unit in the display panel of the present application;

[0057] Figure 2 It is a structure sectional view schematic diagram along the AA section line in the present application; Figure 1

[0058] Figure 3 It is another structure sectional view schematic diagram along the AA section line in the present application; Figure 1

[0059] Figure 4 It is still another structure sectional view schematic diagram along the AA section line in the present application; Figure 1

[0060] Figure 5 It is still another structure sectional view schematic diagram along the AA section line in the present application; Figure 1

[0061] Figure 6a It is a whole structure schematic diagram of the display panel in the present application;

[0062] Figure 6b It is a whole structure top view schematic diagram of the display panel in the present application;

[0063] Figure 6c It is a whole film layer superposition schematic diagram of the display panel in the present application.

[0064] The signs in the drawings are as follows:

[0065] ​​​​1, substrate; 2, pixel unit; 21, anode; 210, connection area; 22, light-emitting functional layer; 23, cathode; 201, effective light-emitting area; 202, peripheral edge area; 203, first light-emitting device; 204, second light-emitting device; 205, third light-emitting device; 3, encapsulation layer; 31, first sub-layer; 32, second sub-layer; 4, insulating layer; 40, via hole; 5, conductive structure; 6, color film layer; 7, pixel definition layer; 71, first part; 72, second part; 8, cover plate; 9, flexible circuit board. DETAILED DESCRIPTION

[0066] In order for those skilled in the art to better understand the technical solutions of the present application, a display panel and a display device of the present application are further described in detail below in combination with the drawings and specific embodiments.

[0067] In a high-integration and size miniaturization silicon-based OLED display panel, in order to achieve high-brightness display effect, a lens is arranged at the light-emitting side of the OLED device. In the related art, a protruding structure is arranged at the center position of the anode of the OLED device in the silicon-based OLED display panel, the protruding structure is arranged with the same material and in the same layer as the pixel definition layer, the protruding structure can lift the film layer (such as the encapsulation layer) with a certain refractive index formed subsequently at the light-emitting side of the OLED device to form a lens structure, the lens structure can improve the brightness of the OLED device at the normal viewing angle (i.e. the viewing line is perpendicular to the OLED display panel), thereby improving the brightness of the OLED display panel at the normal viewing angle.

[0068] However, the protruding structure is located at the center position of the anode of the OLED device, which can affect the flatness of the anode of the OLED device, and then affect the brightness uniformity of the OLED device, and finally affect the brightness uniformity of the entire OLED display panel; that is, in the case that the flatness of the anode of the OLED device cannot be guaranteed, the brightness uniformity of the OLED device cannot be realized, and at the same time, the brightness uniformity of the entire OLED display panel cannot be ensured.

[0069] In order to solve the problem that the OLED display panel cannot realize the brightness uniformity in the disclosed technology, an embodiment of the present application provides a display panel, such as Figures 1-5As shown, the display panel comprises a substrate 1, a pixel unit 2 and an encapsulation layer 3, the pixel unit 2 and the encapsulation layer 3 are sequentially stacked on the substrate 1; the pixel unit 2 comprises a plurality of light emitting devices; the light emitting device comprises an anode 21, a light emitting functional layer 22 and a cathode 23, the anode 21, the light emitting functional layer 22 and the cathode 23 are sequentially stacked in a direction away from the substrate 1; the light emitting device has an effective light emitting area 201 and a peripheral edge area 202, the peripheral edge area 202 is arranged around the periphery of the effective light emitting area 201, and the effective light emitting area 201 is connected with the peripheral edge area 202; the encapsulation layer 3 comprises a first sub-layer 31; at least part of the peripheral edge area 202 of the light emitting device is protruded in a direction away from the substrate 1 or is recessed in a direction close to the substrate 1, so that the area of the first sub-layer 31 corresponding to the protruded area is protruded or the area of the first sub-layer 31 corresponding to the recessed area is recessed, so that the area of the first sub-layer 31 corresponding to the pixel unit 2 forms a convex lens or a concave lens.

[0070] By making at least part of the peripheral edge area 202 of the light emitting device protrude in a direction away from the substrate 1 or recess in a direction close to the substrate 1, the area of the first sub-layer 31 corresponding to the protruded area is protruded or the area of the first sub-layer 31 corresponding to the recessed area is recessed, so that the area of the first sub-layer 31 corresponding to the pixel unit 2 forms a convex lens or a concave lens. On the one hand, the convex lens or the concave lens can improve the normal viewing angle brightness of the pixel unit 2, thereby improving the light emitting brightness of the pixel unit 2 and further improving the light emitting brightness of the display panel. On the other hand, on the basis of improving the light emitting brightness of the pixel unit 2 by the convex lens or the concave lens, the driving current of the light emitting device in the pixel unit 2 can be relatively reduced, thereby improving the service life of the display panel. On the other hand, the flatness of the effective light emitting area 201 of the light emitting device can be ensured, thereby improving the uniformity of the light emitting brightness of the light emitting device and further improving the brightness uniformity of the display panel.

[0071] Optionally, the orthographic projection of the convex lens or the concave lens on the substrate 1 at least overlaps with 1 / 3 of the area of the pixel unit 2. In this way, the convex lens can play a good converging role on the light emitted by the pixel unit 2, and the concave lens can improve the large viewing angle color deviation phenomenon, thereby further ensuring the normal viewing angle brightness of the pixel unit 2, improving the light emitting brightness of the pixel unit 2, and further improving the light emitting brightness of the display panel.

[0072] Optionally, as shown in FIG. 2, the convex lens or the concave lens is arranged on the first sub-layer 31. Figure 1 and Figure 2As shown, the substrate 1 includes a pixel driving circuit (not shown in the figure), and an insulating layer 4 is arranged between the pixel driving circuit and the anode 21, and a plurality of through holes 40 are arranged in the insulating layer 4; the orthographic projection of the plurality of through holes 40 on the substrate 1 is located in the peripheral edge area 202 of the light emitting device; a conductive structure 5 is arranged in the through hole 40; the anodes 21 of the plurality of light emitting devices are connected to the pixel driving circuit through the conductive structures 5 in different through holes 40; and the end of the conductive structure 5 away from the substrate 1 protrudes from the insulating layer 4, so that the corresponding protruding area of the first sub-layer 31 is protruded.

[0073] The end of the conductive structure 5 away from the substrate 1 protrudes from the insulating layer 4, so that the anode 21, the light emitting functional layer 22, the cathode 23 and the corresponding parts of the first sub-layer 31 located on the conductive structure 5 are lifted to form protrusions, and the plurality of protrusions above the corresponding plurality of through holes 40 of the first sub-layer 31 can be connected as a whole to form a convex lens covering the pixel unit 2, the convex lens has a light converging effect, thereby improving the normal viewing angle luminous brightness of the pixel unit 2.

[0074] Optionally, the height of the conductive structure 5 protruding from the insulating layer 4 is 2-3 times the thickness of the anode 21.

[0075] Optionally, the conductive structure 5 can adopt tungsten. The height of the conductive structure 5 protruding from the insulating layer 4 is 500 angstroms. The anode 21 adopts a laminated structure of titanium (Ti) / aluminum (AL) / indium tin oxide (ITO), and the thicknesses of titanium (Ti) / aluminum (AL) / indium tin oxide (ITO) are 100 / 100 / 50 angstroms, respectively. In this way, a convex can be formed above the anode 21, and the corresponding light emitting functional layer 22 and cathode 23 will also be upwardly protruded to form a circular arc structure, and the corresponding first sub-layer 31 will also be upwardly protruded to form a circular arc structure.

[0076] Optionally, the encapsulating layer 3 further includes a second sub-layer 32 located on the side of the first sub-layer 31 away from the substrate 1; the refractive index of the second sub-layer 32 is smaller than that of the first sub-layer 31; and the surface of the side of the second sub-layer 32 away from the substrate 1 is a plane.

[0077] Optionally, the material of the first sub-layer 31 includes silicon nitride, and the material of the second sub-layer 32 includes silicon oxide. The first sub-layer 31 adopts silicon nitride (SiNx) with a relatively high refractive index, and the second sub-layer 32 adopts silicon oxide (SiOx) with a relatively low refractive index.

[0078] Optionally, the encapsulating layer further includes a third sub-layer (not shown in the figure) located on the side of the second sub-layer away from the substrate; and the refractive index of the third sub-layer is smaller than that of the second sub-layer.

[0079] Optionally, as Figure 1As shown, the anode 21 of the light emitting device includes a connection region 210, a normal projection of the connection region 210 on the substrate 1 is located at the peripheral edge region 202 of the light emitting device; the via hole 40 has a normal projection on the anode 21, which is located at the connection region 210; the pixel unit 2 includes a first light emitting device 203, a second light emitting device 204 and a third light emitting device 205, the first light emitting device 203, the second light emitting device 204 and the third light emitting device 205 are arranged in a triangle shape; the anode connection region 210 of the first light emitting device 203, the anode connection region 210 of the second light emitting device 204 and the anode connection region 210 of the third light emitting device 205 are arranged along a straight line direction L; the straight line overlaps the normal projection of the triangle on the substrate 1, and the straight line is parallel to one side of the triangle.

[0080] Optionally, the straight line passes through the center of the triangle. In this way, the convex lens structure formed on the first sub-layer 31 can better correspond to the pixel unit 2, thereby better improving the normal viewing angle luminous brightness of the pixel unit 2.

[0081] Optionally, the normal projections of the anode 21 of the first light emitting device 203, the second light emitting device 204 and the third light emitting device 205 on the substrate 1 have the same shape; the shape of the effective light emitting region 201 of the anode 21 includes a regular hexagon; and the shape of the connection region 210 of the anode 21 includes a rectangle. Of course, the shapes of the effective light emitting region 201 and the connection region 210 of the anode 21 are not limited to the above-mentioned shapes, and can also be other shapes.

[0082] In the embodiment, the three convex conductive structures 5 arranged along the straight line direction L make three continuous circular arcs on the first sub-layer 31, and the three circular arcs connected together can serve as a convex lens shared by the first light emitting device 203, the second light emitting device 204 and the third light emitting device 205. In addition, the refractive index of the first sub-layer 31 is higher than that of the second sub-layer 32, so that a convex lens structure capable of converging light can be formed. The conductive structure 5 not only ensures sufficient electrical connection between the lower layer pixel driving circuit and the anode 21, but also enables the film layer formed thereon to form a convex platform, thereby forming a convex lens structure located on the light emitting side of the light emitting device. On the one hand, the display quality of the display panel is improved, and on the other hand, the service life of the display panel is prolonged, the yield of the display panel is improved, and the competitive advantage of the display panel is improved.

[0083] Optionally, as Figure 3As shown, the display panel further comprises a color film layer 6, the color film layer 6 comprises a plurality of color resist of different colors, the plurality of color resist of different colors correspond to the plurality of light emitting devices one by one respectively, the color film layer 6 is located on the side of the first sub-layer 31 away from the substrate 1 and the side of the second sub-layer 32 close to the substrate 1; the shape of the color film layer 6 is matched with the shape of the first sub-layer 31. Wherein, when the area shape of the corresponding pixel unit 2 of the first sub-layer 31 is a circular arc shape, the shape of the color film layer 6 located on the circular arc first sub-layer 31 is also a circular arc shape, through the two-layer circular arc structure of the first sub-layer 31 and the color film layer 6, a convex lens design structure is formed, which can further improve the display brightness of the pixel unit 2 and even the display panel.

[0084] Optionally, the color film layer can also be located on the side of the second sub-layer away from the substrate.

[0085] The embodiment of the present application further provides a display panel, which is different from the above-mentioned embodiment, as shown in the figure, Figure 4 As shown, the display panel further comprises a pixel limiting layer 7, which is located on the side of the anode 21 away from the substrate 1 and the side of the light emitting functional layer 22 close to the substrate 1, and the anodes 21 of any adjacent light emitting devices are spaced apart from each other; the pixel limiting layer 7 comprises a first part 71 and a second part 72, and the first part 71 and the second part 72 are connected as a whole; the first part 71 is surrounded around the four peripheral edges of the anode 21, and the orthographic projection of the first part 71 on the substrate 1 overlaps with the orthographic projection of the four peripheral edge areas 202 of the light emitting devices on the substrate 1; the orthographic projection of the second part 72 on the substrate 1 covers the spacing area between the anodes 21 of adjacent light emitting devices; the side surface of the first part 71 away from the substrate 1 is higher than the side surface of the second part 72 away from the substrate 1.

[0086] Wherein, the side surface of the first part 71 away from the substrate 1 is higher than the side surface of the second part 72 away from the substrate 1, which can make the four peripheral edge areas 202 of the light emitting functional layer 22 and the cathode 23 of the light emitting device and the part of the first sub-layer 31 corresponding to the four peripheral edge areas 202 of the light emitting device be lifted to form a convex, and the plurality of convexes formed on the first sub-layer 31 can be connected as a whole to form a convex lens covering the pixel unit 2, the convex lens has a light converging effect, thereby improving the normal viewing angle luminous brightness of the pixel unit 2.

[0087] Optionally, the thickness of the pixel limiting layer 7 is 3-5 times of the thickness of the anode 21.

[0088] The other structures of the display panel in the embodiment are the same as those in the above-mentioned embodiment, which will not be described here.

[0089] In the embodiment, the pixel definition layer 7 with a large thickness is arranged at the four peripheral edge areas 202 of the light emitting device, and the thickness of the pixel definition layer 7 is 3-5 times the thickness of the anode 21, the anode 21 adopts a laminated structure of titanium (Ti) / aluminum (AL) / titanium (Ti) / indium tin oxide (ITO), the thicknesses of the titanium (Ti) / aluminum (AL) / titanium (Ti) / indium tin oxide (ITO) are 100 / 300 / 50 / 100 angstroms respectively, the thickness of the pixel definition layer 7 is 1500 angstroms, so that the part of the pixel definition layer 7 at the four peripheral edge areas 202 of the anode 21 is lifted to form a boss, and the light emitting functional layer 22, the cathode 23 and the first sub-layer 31 corresponding to the boss position are also lifted to form a circular arc structure, so that the circular arc structure with the boss is formed at the position corresponding to the overlapping position of the pixel definition layer 7 at the four peripheral edge areas 202 of the light emitting device, and the circular arc structure with the boss covers the light emitting device; the three circular arc structures with the boss corresponding to the positions above the first light emitting device 203, the second light emitting device 204 and the third light emitting device 205 are connected together to form a convex lens structure corresponding to the pixel unit 2, and the refractive index of the first sub-layer 31 is higher than that of the second sub-layer 32, so that the convex lens structure capable of converging light can be formed. The pixel definition layer 7 with a large thickness is arranged at the four peripheral edge areas 202 of the light emitting device, which does not affect the flatness and uniformity of the anode 21, on the one hand, the film layer formed on the pixel definition layer 7 can form a convex lens structure, and on the other hand, the pixel definition layer 7 with a large thickness can isolate the cathode 23, improve the problem of electric leakage of the light emitting device, thereby improving the display quality of the display panel, prolonging the service life of the display panel, improving the yield of the display panel, and improving the competitive advantage of the display panel.

[0090] Optionally, Figure 4 In the embodiment, the first part 71 of the pixel definition layer 7 lifts the subsequent film layers to form a convex lens structure, and the convex lens structure formed in the embodiment is connected together as a whole to serve as the convex lens covering the pixel unit 2. Figure 2 In the embodiment, the conductive structure 5 lifts the subsequent film layers to form a convex lens structure, and the convex lens structure formed in the embodiment is connected together as a whole to serve as the convex lens covering the pixel unit 2. Figure 4 In the embodiment, the convex lens formed in the first part 71 of the pixel definition layer 7 and the convex lens formed in the conductive structure 5 are connected together as a whole to serve as the convex lens covering the pixel unit 2. Figure 2 In the embodiment, the convex lens formed in the first part 71 of the pixel definition layer 7 and the convex lens formed in the conductive structure 5 are connected together as a whole to serve as the convex lens covering the pixel unit 2.

[0091] The embodiment of the present application further provides a display panel, which is different from the above-mentioned embodiments, as shown in Figure 5As shown, the substrate 1 includes a pixel driving circuit (not shown in the figure), and an insulating layer 4 is arranged between the pixel driving circuit and the anode 21, and a plurality of through holes 40 are arranged in the insulating layer 4; the orthographic projection of the plurality of through holes 40 on the substrate 1 is located at the peripheral edge area 202 of the light emitting device; a conductive structure 5 is arranged in the through hole 40; the anodes 21 of the plurality of light emitting devices are respectively connected to the pixel driving circuit through the conductive structures 5 in different through holes 40; one end of the conductive structure 5 away from the substrate 1 is located in the insulating layer 4, and the side surface of the conductive structure 5 away from the substrate 1 is lower than the side surface of the insulating layer 4 away from the substrate 1, so that the corresponding recessed area of the first sub-layer 31 is recessed.

[0092] The one end of the conductive structure 5 away from the substrate 1 is located in the insulating layer 4, and the side surface of the conductive structure 5 away from the substrate 1 is lower than the side surface of the insulating layer 4 away from the substrate 1, so that the corresponding parts of the anode 21, the light emitting functional layer 22, the cathode 23 and the first sub-layer 31 located on the conductive structure 5 are recessed along the recess formed at the position of the conductive structure 5, and the plurality of recesses of the first sub-layer 31 corresponding to the positions of the plurality of through holes 40 can be connected as a whole to form a concave lens covering the pixel unit 2, and the concave lens can improve the large-viewing-angle color deviation phenomenon.

[0093] Optionally, the encapsulation layer 3 further includes a second sub-layer 32 located on the side of the first sub-layer 31 away from the substrate 1; the refractive index of the second sub-layer 32 is greater than that of the first sub-layer 31; and the side surface of the second sub-layer 32 away from the substrate 1 is a plane. In this way, the combination of the second sub-layer 32 and the first sub-layer 31 has a certain converging effect on the outgoing light rays passing therethrough, thereby improving the normal-viewing-angle luminous brightness of the pixel unit 2.

[0094] Optionally, the second sub-layer 32 is made of silicon nitride (SiNx) with a relatively high refractive index, and the first sub-layer 31 is made of silicon oxide (SiOx) with a relatively low refractive index.

[0095] Optionally, the encapsulation layer further includes a third sub-layer (not shown in the figure) located on the side of the second sub-layer away from the substrate; the refractive index of the third sub-layer is greater than that of the second sub-layer.

[0096] Optionally, the height difference between the side surface of the conductive structure 5 away from the substrate 1 and the side surface of the insulating layer 4 away from the substrate 1 is 1-3 times the thickness of the anode 21.

[0097] Optionally, the conductive structure 5 can be made of tungsten. The side surface of the conductive structure 5 facing away from the substrate 1 is lower than the side surface of the insulating layer 4 facing away from the substrate 1, thereby forming a concave tungsten hole structure. The depth of the concave tungsten hole is 400 angstroms, the anode 21 is made of a titanium (Ti) / aluminum (AL) stack structure, and the thickness of the titanium (Ti) / aluminum (AL) is 100 / 100 angstroms, respectively. In this way, a groove can be formed above the anode 21, and the light-emitting functional layer 22 and the cathode 23 corresponding to the groove will also be concave to form a recess structure, and the first sub-layer 31 corresponding to the position will also be concave to form a recess structure.

[0098] The other structures of the display panel in the embodiment are the same as those of the display panel in Figure 2 The other structures of the display panel in the embodiment are the same as those of the display panel in

[0099] In the embodiment, the three concave conductive structures 5 arranged along the linear direction L make the first sub-layer 31 form three continuous concaves, and the three concaves connected together can serve as a concave lens shared by the first light-emitting device 203, the second light-emitting device 204, and the third light-emitting device 205. In addition, the refractive index of the second sub-layer 32 is higher than that of the first sub-layer 31, thereby forming a concave lens structure capable of converging light. The conductive structure 5 not only ensures sufficient electrical connection between the lower pixel driving circuit and the anode 21, but also makes the film layers formed thereon concave, thereby forming a concave lens structure on the light-emitting side of the light-emitting device. On the one hand, the display quality of the display panel is improved, and on the other hand, the service life of the display panel is prolonged, the yield of the display panel is improved, and the competitive advantage of the display panel is improved.

[0100] Optionally, the color film layer 6 is located on the side of the second sub-layer 32 facing away from the substrate 1. The cross-sectional shape of the color film layer 6 perpendicular to the substrate 1 is rectangular.

[0101] Optionally, in the embodiment, the orthographic projection of the convex lens or concave lens formed on the first sub-layer 31 on the substrate 1 can cover one pixel unit 2, or can cover multiple pixel units 2 arranged adjacent to each other.

[0102] Optionally, in the embodiment, the light-emitting device is an OLED (Organic Light-Emitting Diode) device, and the light-emitting device can emit white light. That is, the light-emitting functional layer 22 and the cathode 23 of all light-emitting devices in the display panel are covered as a whole, the area of the light-emitting functional layer 22 corresponding to and in contact with the orthographic projection of the anode 21 on the substrate 1 is the effective light-emitting area 201, and the entire display panel realizes color display through the subsequent arrangement of the color film layer 6.

[0103] ​Optionally, in this embodiment, the light-emitting device can also emit light of different colors, such as red, green or blue light. That is, the light-emitting functional layer 22 of the light-emitting device uses a light-emitting material that can emit light of a certain color. In this way, the display panel may not need to be provided with a color filter layer.

[0104] Optionally, in this embodiment, the substrate 1 is a silicon substrate, and the pixel driving circuit is formed on the silicon substrate.

[0105] Optionally, such as Figure 6a , 6b As shown in 6c, the display panel also includes a cover plate 8, which covers the side of the encapsulation layer 3 facing away from the substrate 1. Optionally, the cover plate 8 is made of glass, which can emit light while protecting the light-emitting device.

[0106] Optionally, the orthographic projection of the cover plate 8 onto the substrate 1 covers the light-emitting display area on the substrate 1. The cover plate 8 is slightly larger than the light-emitting display area on the substrate 1, and slightly smaller than the substrate 1, with a certain distance left on all four sides, which can realize the positioning and fixation of the silicon-based display panel. A flexible circuit board (FPC) 9 is connected to one side of the substrate 1. The flexible circuit board 9 realizes the electrical connection with the pixel driving circuit in the substrate 1, so that external signals can be transmitted to the pixel driving circuit through the flexible circuit board 9 to drive the display panel to display.

[0107] Optionally, the cathode 23 can be made of one or more materials selected from magnesium and silver. In this embodiment, the cathode 23 is light-transmitting.

[0108] Optionally, the color resist in the color filter layer 6 is disposed on the first sub-layer 31 or the second sub-layer 32 and corresponding to the anode 21, so that the light emitted by the light-emitting device is colored. The encapsulation layer 3 can effectively encapsulate the light-emitting device, prevent the intrusion of external moisture and oxygen, protect the light-emitting device, and extend the life of the display panel.

[0109] The display panel provided in this embodiment of the invention, by making at least a partial portion of the peripheral edge area of ​​the light-emitting device bulge away from the substrate or recess towards the substrate, makes the corresponding bulging area of ​​the first sub-layer bulge or the corresponding recessed area recessed, so that the area of ​​the corresponding pixel unit of the first sub-layer forms a convex lens or a concave lens. On the one hand, the convex lens or concave lens can improve the brightness of the pixel unit at the positive viewing angle, thereby improving the luminous brightness of the pixel unit, and thus improving the luminous brightness of the display panel; on the other hand, by improving the luminous brightness of the pixel unit through the convex lens or concave lens, the driving current of the light-emitting device in the pixel unit can be relatively reduced, thereby improving the lifespan of the display panel; furthermore, it can ensure the flatness of the effective light-emitting area of ​​the light-emitting device, thereby improving the uniformity of the luminous brightness of the light-emitting device, and thus improving the brightness uniformity of the display panel.

[0110] The display device also comprises the display panel in the above embodiments.

[0111] By using the display panel in the above embodiments, the display brightness and display brightness uniformity of the display device are improved, and the service life of the display device is also improved.

[0112] The display device can be an AR / VR panel, an AR / VR television, a mobile phone, a tablet computer, a notebook computer, a display, a notebook computer, a digital photo frame, a navigator, or any product or component with a display function.

[0113] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the protection scope of the present application.

Claims

1. A display panel, comprising a substrate, pixel units, and an encapsulation layer, wherein the pixel units and the encapsulation layer are sequentially stacked on the substrate; the pixel unit includes a plurality of light-emitting devices; each light-emitting device includes an anode, a light-emitting functional layer, and a cathode, wherein the anode, the light-emitting functional layer, and the cathode are sequentially stacked in a direction away from the substrate; each light-emitting device has an effective light-emitting area and a surrounding edge area, the surrounding edge area surrounding the effective light-emitting area, and the effective light-emitting area is connected to the surrounding edge area; the encapsulation layer includes a first sub-layer; characterized in that, At least a portion of the peripheral edge region of the light-emitting device protrudes away from the substrate, causing the corresponding protruding region of the first sub-layer to protrude, thereby forming a convex lens in the region of the first sub-layer corresponding to the pixel unit; the substrate includes a pixel driving circuit, an insulating layer is disposed between the pixel driving circuit and the anode, and a plurality of vias are formed in the insulating layer; the orthogonal projection of the plurality of vias on the substrate is located in the peripheral edge region of the light-emitting device. The via is provided with a conductive structure; The anodes of the plurality of light-emitting devices are respectively connected to the pixel driving circuit through the conductive structures in different vias; One end of the conductive structure opposite to the substrate protrudes from the insulating layer; the multiple protrusions above the corresponding vias of the first sub-layer are connected together to form the convex lens covering the pixel unit.

2. The display panel according to claim 1, characterized in that, The orthogonal projection of the convex lens onto the substrate overlaps with at least 1 / 3 of the area of ​​the pixel unit.

3. The display panel according to claim 1, characterized in that, It also includes a pixel defining layer located on the side of the anode facing away from the substrate and on the side of the light-emitting functional layer close to the substrate, wherein the anodes of any adjacent light-emitting devices are spaced apart from each other; the pixel defining layer includes a first part and a second part, the first part and the second part being connected as a whole; the first part surrounds the four edges of the anode, and the orthographic projection of the first part on the substrate overlaps with the orthographic projection of the four edges of the light-emitting device on the substrate; the orthographic projection of the second part on the substrate covers the spaced area between the anodes of adjacent light-emitting devices; the surface of the first part facing away from the substrate is higher than the surface of the second part facing away from the substrate.

4. The display panel according to claim 1, characterized in that, The encapsulation layer further includes a second sublayer located on the side of the first sublayer facing away from the substrate; the refractive index of the second sublayer is less than the refractive index of the first sublayer; the surface of the second sublayer facing away from the substrate is planar; or, the encapsulation layer further includes a third sublayer located on the side of the second sublayer facing away from the substrate; the refractive index of the third sublayer is less than the refractive index of the second sublayer.

5. The display panel according to claim 1, characterized in that, The height of the conductive structure protruding from the insulating layer is 2 to 3 times the thickness of the anode.

6. The display panel according to claim 3, characterized in that, The thickness of the pixel defining layer is 3 to 5 times the thickness of the anode.

7. The display panel according to claim 4, characterized in that, The material of the first sublayer includes silicon nitride, and the material of the second sublayer includes silicon oxide.

8. A display panel, comprising a substrate, pixel units, and an encapsulation layer, wherein the pixel units and the encapsulation layer are sequentially stacked on the substrate; the pixel unit includes a plurality of light-emitting devices; each light-emitting device includes an anode, a light-emitting functional layer, and a cathode, wherein the anode, the light-emitting functional layer, and the cathode are sequentially stacked in a direction away from the substrate; each light-emitting device has an effective light-emitting area and a surrounding edge area, the surrounding edge area surrounding the effective light-emitting area, and the effective light-emitting area being connected to the surrounding edge area; the encapsulation layer includes a first sub-layer; characterized in that, At least a portion of the peripheral edge region of the light-emitting device is recessed towards the substrate, so that the corresponding recessed region of the first sub-layer is recessed, thereby forming a concave lens in the region of the first sub-layer corresponding to the pixel unit; the substrate includes a pixel driving circuit, an insulating layer is disposed between the pixel driving circuit and the anode, and a plurality of vias are formed in the insulating layer; the orthogonal projection of the plurality of vias on the substrate is located in the peripheral edge region of the light-emitting device. A conductive structure is provided in the via; The anodes of the plurality of light-emitting devices are respectively connected to the pixel driving circuit through the conductive structures in different vias; One end of the conductive structure facing away from the substrate is located in the insulating layer, and the surface of the conductive structure facing away from the substrate is lower than the surface of the insulating layer facing away from the substrate; the multiple recesses of the first sub-layer corresponding to the multiple via positions are connected as one to form the concave lens covering the pixel unit.

9. The display panel according to claim 8, characterized in that, The orthogonal projection of the concave lens onto the substrate overlaps with at least 1 / 3 of the area of ​​the pixel unit.

10. The display panel according to claim 8, characterized in that, The encapsulation layer further includes a second sublayer located on the side of the first sublayer facing away from the substrate; the refractive index of the second sublayer is greater than that of the first sublayer; the surface of the second sublayer facing away from the substrate is planar; or, the encapsulation layer further includes a third sublayer located on the side of the second sublayer facing away from the substrate; the refractive index of the third sublayer is greater than that of the second sublayer.

11. The display panel according to claim 8, characterized in that, The height difference between the side surface of the conductive structure facing away from the substrate and the side surface of the insulating layer facing away from the substrate is 1 to 3 times the thickness of the anode.

12. The display panel according to claim 4 or 10, characterized in that, It also includes a color filter layer, which includes multiple color resists of different colors, each of which corresponds to one of the multiple light-emitting devices; the color filter layer is located on the side of the first sublayer away from the substrate and on the side of the second sublayer close to the substrate; the shape of the color filter layer is adapted to the shape of the first sublayer; or, the color filter layer is located on the side of the second sublayer away from the substrate.

13. The display panel according to claim 1 or 8, characterized in that, The anode of the light-emitting device includes a connection area, the orthographic projection of which onto the substrate is located at the periphery of the light-emitting device; the orthographic projection of the via onto the anode is located at the connection area; the pixel unit includes a first light-emitting device, a second light-emitting device, and a third light-emitting device, which are arranged in a triangle; the anode connection areas of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged along a straight line; the straight line overlaps with the orthographic projection of the triangle onto the substrate, and the straight line is parallel to one side of the triangle.

14. The display panel according to claim 13, characterized in that, The straight line passes through the center of the triangle.

15. The display panel according to claim 14, characterized in that, The anodes of the first, second, and third light-emitting devices have the same orthographic projection shape on the substrate; the effective light-emitting area of ​​the anode has a regular hexagonal shape; and the connection area of ​​the anode has a rectangular shape.

16. A display device, characterized in that, Includes the display panel as described in any one of claims 1-15.

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