Display device, display panel and method for manufacturing the same

Abstract

A display device, a display panel and a manufacturing method thereof, wherein the display panel comprises a driving backplane (BP), a plurality of light emitting devices (OL), a pixel definition layer (PDL), a lens layer (LE), a dielectric layer (TM) and a transparent cover plate (CG). The pixel definition layer (PDL) and the light emitting device (OL) are arranged on the same side of the driving backplane (BP). The lens layer (LE) is arranged on the side of the light emitting device (OL) away from the driving backplane (BP). The lens layer (LE) comprises a separation lens (Len1) and an intermediate lens (Len2). The separation lens (Len1) is provided with a light transmission hole (LH), and the intermediate lens (Len2) is arranged in the light transmission hole (LH) at intervals. The dielectric layer (TM) covers the lens layer (LE), and the refractive index of the dielectric layer (TM) is greater than the refractive index of the lens layer (LE). The transparent cover plate (CG) is arranged on the side of the dielectric layer (TM) away from the driving backplane (BM). It is used to improve the light output rate.

Description

Technical Field

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

[0002] Display panels are an indispensable part of electronic devices such as mobile phones and computers, including liquid crystal display panels, organic electroluminescent display panels, etc. At present, people have higher and higher requirements for display effects, but the brightness of existing display panels still needs to be improved, and color cast and other display abnormalities are prone to occur.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The present disclosure provides a display device, a display panel, and a method for manufacturing the display panel.

[0005] According to one aspect of the present disclosure, there is provided a display panel, comprising:

[0006] Driver backplane;

[0007] A plurality of light emitting devices are distributed at intervals on a side surface of the driving backplane;

[0008] A pixel definition layer, which is disposed on the same side of the driving backplane as the light-emitting device and has a plurality of openings, wherein each of the openings defines a range of each of the light-emitting devices in a one-to-one correspondence;

[0009] A lens layer is provided on a side of the light emitting device away from the driving backplane, the lens layer comprises a separation lens and an intermediate lens, the separation lens is provided with a light-transmitting hole, the intermediate lens is provided within a range surrounded by the light-transmitting hole and is spaced apart from the side wall of the light-transmitting hole; in a direction perpendicular to the driving backplane, one of the openings is arranged opposite to one of the light-transmitting holes; the light-transmitting holes and the opening sizes expand in a direction away from the driving backplane, and the outer peripheral surface of the intermediate lens shrinks in a direction away from the driving backplane;

[0010] a dielectric layer, covering the lens layer and filling the light-transmitting hole, wherein the refractive index of the dielectric layer is greater than the refractive index of the lens layer;

[0011] The transparent cover plate is arranged on a side of the dielectric layer away from the driving back plate.

[0012] In an exemplary embodiment of the present disclosure, the light emitting device includes a first electrode, a light emitting layer, and a second electrode sequentially stacked in a direction away from the driving backplane;

[0013] The first electrodes of the light-emitting devices are distributed at intervals and exposed by the openings one by one; the light-emitting devices share the same second electrode; the second electrode covers the side of the pixel definition layer away from the driving backplane and is recessed into the opening; the lens layer is provided on the side of the second electrode away from the driving backplane;

[0014] The orthographic projection of the separation lens on the driving backplane is located within the range covered by the pixel definition layer, and the middle lens is located in the opening.

[0015] In an exemplary embodiment of the present disclosure, the display panel further includes:

[0016] An encapsulation layer, covering each of the light-emitting devices;

[0017] The touch layer is arranged on the surface of the packaging layer away from the driving back plate; the lens layer covers the touch layer; and the transparent cover is located on the side of the touch layer away from the driving back plate.

[0018] In an exemplary embodiment of the present disclosure, in an intermediate lens within the opening and its corresponding light-transmitting hole, the orthographic projection of the intermediate lens on the driving backplane covers the center of the orthographic projection of the opening on the driving backplane.

[0019] In an exemplary embodiment of the present disclosure, the light-transmitting hole is surrounded by a plurality of side walls; the outer peripheral surface of the intermediate lens includes at least one lens side surface parallel to the orthographic projection of at least one side wall of the light-transmitting hole where the lens is located on the driving backplane.

[0020] In an exemplary embodiment of the present disclosure, the width of the light-transmitting hole in the row direction is smaller than the length in the column direction; the width of the intermediate lens in the row direction is smaller than the length in the column direction.

[0021] In an exemplary embodiment of the present disclosure, the intermediate lens is a strip-shaped structure extending along the column direction;

[0022] In the row direction, the ratio of the width of the intermediate lens to the width of the light-transmitting hole in which it is located is not less than 10% and not more than 50%;

[0023] In the column direction, the ratio of the length of the intermediate lens to the length of the light-transmitting hole where the intermediate lens is located is not less than 30% and not more than 80%.

[0024] In an exemplary embodiment of the present disclosure, both lens side surfaces of the intermediate lens have a plurality of recessed portions distributed at intervals;

[0025] In the row direction, the ratio of the depth of the recessed portion to the width of the intermediate lens is not less than 20% and not more than 25%;

[0026] In the column direction, the ratio of the distance between one end of the intermediate lens and the lowest point of the recessed portion closest to the end to the length of the intermediate lens is not less than 10% and not more than 50%.

[0027] In an exemplary embodiment of the present disclosure, the outer peripheral surface of the intermediate lens is formed by a plurality of smoothly connected curved lens side surfaces.

[0028] In an exemplary embodiment of the present disclosure, the intermediate lens includes a plurality of extension portions distributed radially, and at least one of the extension portions is parallel to the orthographic projection of a side wall of the light-transmitting hole where the extension portion is located on the driving backplane.

[0029] In an exemplary embodiment of the present disclosure, the outer peripheral surface of the intermediate lens has the same shape as the light-transmitting hole where the intermediate lens is located on the driving backplane.

[0030] In an exemplary embodiment of the present disclosure, the light-transmitting hole is surrounded by two planar side walls and one curved side wall; the outer peripheral surface of the intermediate lens is surrounded by two planar side surfaces and one curved side surface;

[0031] The two planar side surfaces are respectively parallel to the orthographic projections of the two planar side walls on the driving backplane.

[0032] In an exemplary embodiment of the present disclosure, the light-transmitting hole is surrounded by two planar side walls and one curved side wall;

[0033] The intermediate lens is a strip-shaped structure, and the intermediate lens is located between the center of the light-transmitting hole where the intermediate lens is located and the curved side wall.

[0034] In an exemplary embodiment of the present disclosure, the intermediate lens includes a first segment and a second segment connected at a specified angle, and the first segment and the second segment are symmetrically arranged about a central axis passing through the center of the light-transmitting hole along a column direction.

[0035] In an exemplary embodiment of the present disclosure, the intermediate lens is an arc-shaped strip structure extending parallel to the curved side wall of the light-transmitting hole where the intermediate lens is located.

[0036] In an exemplary embodiment of the present disclosure, the intermediate lens is annular and surrounds the center of the light-transmitting hole where the intermediate lens is located.

[0037] In an exemplary embodiment of the present disclosure, the intermediate lens includes a plurality of lens units spaced apart and distributed around the center of the light transmission hole where the intermediate lens is located.

[0038] In an exemplary embodiment of the present disclosure, the slope of the curved sidewall is the same as the slope of the planar sidewall.

[0039] According to one aspect of the present disclosure, there is provided a method for manufacturing a display panel, comprising:

[0040] forming a driving backplane;

[0041] A pixel definition layer and a plurality of light-emitting devices distributed at intervals are formed on one side of the driving backplane; the pixel definition layer has a plurality of openings corresponding to and defining the range of each of the light-emitting devices;

[0042] A lens layer including a separation lens and an intermediate lens is formed on a side of the light emitting device away from the driving backplane, the separation lens is provided with a light-transmitting hole, the intermediate lens is provided within a range surrounded by the light-transmitting hole and is spaced apart from the side wall of the light-transmitting hole; in a direction perpendicular to the driving backplane, one of the openings and one of the light-transmitting holes are arranged opposite to each other and have the same shape; the light-transmitting hole and the side wall of the opening expand in a direction away from the driving backplane, and the outer peripheral surface of the intermediate lens contracts in a direction away from the driving backplane;

[0043] forming a dielectric layer covering the lens layer and filling the light-transmitting hole, wherein the refractive index of the dielectric layer is greater than the refractive index of the lens layer;

[0044] A transparent cover plate is formed on a side of the dielectric layer away from the driving backplane.

[0045] According to one aspect of the present disclosure, a display device is provided, comprising any one of the display panels described above.

[0046] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0048] Figure 1 It is a cross-sectional view of an embodiment of the display panel disclosed herein.

[0049] Figure 2 It is a cross-sectional view of another embodiment of the display panel disclosed in the present invention.

[0050] Figure 3It is a cross-sectional view of yet another embodiment of the display panel disclosed herein.

[0051] Figure 4 FIG. 1 is a schematic diagram of light-transmitting holes and openings in an embodiment of a display panel disclosed herein.

[0052] Figure 5 FIG. 4 is a schematic diagram of an opening in an embodiment of a display panel disclosed herein.

[0053] Figure 6-Figure 10 Schematic diagrams of various embodiments of the display panel of the present disclosure in which the middle lens covers the center of the light emitting device.

[0054] Figure 11-Figure 20 Schematic diagrams of various embodiments of the present disclosure showing that the middle lens of the display panel does not cover the center of the light emitting device.

[0055] Fig.21 Schematic diagram of the distribution of light-emitting devices in one embodiment of the display panel disclosed herein.

[0056] Fig. 22 FIG. 1 is a schematic diagram of step S130 in one embodiment of the method for manufacturing a display panel disclosed herein. DETAILED DESCRIPTION

[0057] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0058] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0059] The row direction X and the column direction Y herein are only two mutually perpendicular directions. In the drawings of the present disclosure, the row direction X may be horizontal and the column direction Y may be vertical, but it is not limited thereto. If the display panel is rotated, the actual directions of the row direction X and the column direction Y may change. The X direction in the drawings exemplarily shows the row direction, and the Y direction exemplarily shows the column direction.

[0060] In the related art, the display panel may include a driving backplane and a plurality of light-emitting devices located on one side of the driving backplane, each of which may be an organic light-emitting diode (OLED). The image display may be realized by controlling the light-emitting devices to emit light independently by the driving backplane. At the same time, the display panel also includes a transparent cover plate, which may cover the side of the light-emitting device away from the driving backplane for protection. The light emitted by the light-emitting device is emitted from the transparent cover plate into the air outside the display panel. The material of the transparent cover plate may be glass, etc., which has a refractive index greater than that of air. Therefore, when the light transparent cover plate enters the air, the light whose incident angle reaches the critical angle of total reflection will be totally reflected at the interface between the transparent cover plate and the air, and cannot be emitted from the transparent cover plate, resulting in low light output efficiency of the display panel. In this process, the larger the incident angle of the light irradiated to the transparent cover plate, the easier it is for total reflection to occur.

[0061] The present disclosure provides a display panel. Figure 1-Figure 6 , Fig.11 and Fig.17 As shown, the display panel may include a driving backplane BP, a light emitting device OL, a pixel definition layer PDL, a lens layer LE, a dielectric layer TM and a transparent cover CG, wherein:

[0062] There are multiple light emitting devices OL, which are spaced apart on one side of the driving backplane BP. The pixel definition layer PDL and the light emitting devices OL are arranged on the same side of the driving backplane BP and have multiple openings PH, each opening PH correspondingly defines the range of each light emitting device OL.

[0063] The lens layer LE is arranged on a side of the light emitting device OL away from the driving back plate BP, and the lens layer LE includes a separation lens Len1 and an intermediate lens Len2, the separation lens Len1 is provided with a light-transmitting hole LH, and the intermediate lens Len2 is arranged within the range surrounded by the light-transmitting hole LH and is spaced apart from the side wall of the light-transmitting hole LH; in a direction perpendicular to the driving back plate BP, an opening PH is arranged opposite to a light-transmitting hole LH and has the same shape; the light-transmitting hole LH and the opening PH expand in a direction away from the driving back plate BP, and the outer peripheral surface of the intermediate lens Len2 contracts in a direction away from the driving back plate BP;

[0064] The dielectric layer TM covers the lens layer LE and fills the light transmission hole LH, and the refractive index of the dielectric layer TM is greater than the refractive index of the lens layer LE. The transparent cover plate CG is arranged on a side of the dielectric layer TM away from the driving back plate BP.

[0065] In the display panel of the embodiment of the present disclosure, the light emitted by the light emitting device OL propagates in a direction away from the driving backplane BP. Since the refractive index of the lens medium layer is greater than the refractive index of the lens layer LE, part of the light emitted by the light emitting device OL can be totally reflected at the side wall of the light transmission hole LH, so that the divergence of the light is reduced and the light is converged. Compared with the light without the total reflection process, the incident angle when it propagates to the transparent cover plate CG after total reflection is smaller, so it is not easy to have total reflection, which is beneficial to improve the light extraction efficiency. At the same time, since an intermediate lens Len2 is provided in the light transmission hole LH, and the intermediate lens Len2 can refract part of the light emitted by the light emitting device OL, it can also converge the light, so that the incident angle of the light passing through the intermediate lens Len2 when irradiating the side wall of the light transmission hole LH is increased, and it is more likely to have total reflection, which is beneficial to reduce the incident angle when propagating to the transparent cover plate CG, and further improve the light extraction efficiency. Among them, Figure 1-Figure 3 The effect of the middle lens Len2 and the separation lens Len1 on the light path is shown. It can be seen that due to the existence of the middle lens Len2 and the separation lens Len1, the light can be emitted at the interface between the transparent cover plate and the air without total reflection.

[0066] The following is a detailed description of the disclosed display panel:

[0067] First, the basic structure of the display panel of the present disclosure is exemplarily described.

[0068] like Figure 1-Figure 5 As shown, the display panel may include a driving backplane BP, a pixel definition layer PDL and a plurality of light-emitting devices OL located on the same side of the driving backplane BP, and the driving backplane BP has a driving circuit that can drive the light-emitting devices OL to emit light to display images. Among them:

[0069] The driving backplane BP may include a substrate and a circuit layer located on one side of the substrate. The substrate may be a flat plate structure, and its material may be a hard material including glass, or a soft material including polyimide. At the same time, the substrate may be a single-layer or multi-layer structure. Taking a multi-layer structure as an example: the substrate may include a multi-layer substrate, and each layer of the substrate is stacked to form a multi-layer structure.

[0070] The circuit layer may be disposed on one side of the substrate. For example, for each base, the circuit layer may be located on the side of the barrier layer of the substrate away from the insulating support layer. Before forming the circuit layer, a buffer layer may be formed on the substrate, and the circuit layer may be disposed on the surface of the buffer layer away from the substrate. The material of the buffer layer may include insulating materials such as silicon nitride and silicon oxide.

[0071] The circuit layer may include a driving circuit, and the driving circuit may drive the light emitting device OL to emit light. For example, the display panel may be divided into at least a display area and a peripheral area outside the display area. Accordingly, the area of ​​the circuit layer corresponding to the display area is a pixel area and an edge area corresponding to the peripheral area, that is, the edge area is located outside the pixel area. The driving circuit may include a pixel circuit located in the pixel area and a peripheral circuit located in the edge area, wherein the pixel circuit may be a pixel circuit such as 7T1C, 7T2C, 6T1C or 6T2C, as long as it can drive the light emitting device OL to emit light, and its structure is not specifically limited here. The number of pixel circuits is the same as the number of light emitting devices OL, and is connected to each light emitting device OL in a one-to-one correspondence, so as to control each light emitting device OL to emit light respectively. Among them, nTmC means that a pixel circuit includes n transistors (represented by the letter "T") and m capacitors (represented by the letter "C"). Of course, the same pixel circuit can also be connected to multiple light emitting devices OL, and drive multiple light emitting devices OL to emit light at the same time, and no special limitation is made here.

[0072] The peripheral circuit may be located in the peripheral area, and the peripheral circuit is connected to the pixel circuit, and is used to input a driving signal to the pixel circuit so as to control the light emitting device OL to emit light. The peripheral circuit may include a gate driving circuit and a light emitting control circuit, and of course, may also include other circuits, and the specific structure of the peripheral circuit is not particularly limited here.

[0073] The above-mentioned circuit layer may include multiple thin film transistors and capacitors, wherein the thin film transistors may be top-gate or bottom-gate thin film transistors, and each thin film transistor may include an active layer and a gate. The active layer of each thin film transistor is arranged in the same semiconductor layer, and the gate is arranged in the same gate layer to simplify the process.

[0074] Taking the top-gate thin-film transistor as an example, the circuit layer may include a semiconductor layer, a first gate insulation layer, a first gate layer, a second gate insulation layer, a second gate layer, an interlayer dielectric layer, a first source and drain layer, a passivation layer, a first planarizing layer, a second source and drain layer, and a second planarizing layer. The specific pattern of each film layer depends on the specific composition of the driving circuit and is not specifically limited here.

[0075] like Figure 1-Figure 5As shown, the pixel definition layer PDL and each light emitting device OL may be arranged on the same side of the driving backplane BP, for example, the pixel definition layer PDL and the light emitting device OL may be arranged on the surface of the second flat layer away from the substrate. The orthographic projection of each light emitting device OL on the circuit layer may be located in the pixel area, that is, in the display area of ​​the display panel, while the light emitting device OL may not be arranged in the edge area. Each light emitting device OL may include a first electrode ANO and a second electrode CAT and a light emitting layer EL located between the first electrode ANO and the second electrode CAT. By applying an electrical signal to the first electrode ANO and the second electrode CAT, the light emitting layer EL may be excited to emit light. The light emitting device OL may be an organic light emitting diode (OLED).

[0076] like Figure 1-Figure 5 As shown, the first electrodes ANO of each light-emitting device OL are spaced apart, and the pixel definition layer PDL is provided with an opening PH exposing each first electrode ANO, that is, one opening PH exposes one first electrode ANO. The pixel definition layer PDLPDL can be used to define each light-emitting device OL, and the range corresponding to one opening PH is the range of one light-emitting device OL. The shape of the opening PH can be a polygon such as a rectangle, a pentagon, a hexagon, or an ellipse, a sector or other shapes, and its shape is not specifically limited here.

[0077] The light-emitting layer EL is at least partially located in the opening PH and is stacked with the first electrode ANO. The light-emitting layer EL may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer and an electron injection layer stacked in sequence in a direction away from the driving backplane BP. Of course, other structures may also be used as long as they can cooperate with the first electrode ANO and the second electrode CAT to emit light. For example, the light-emitting layer EL may include a plurality of light-emitting units arranged in each opening PH in a one-to-one correspondence and distributed at intervals, each light-emitting unit may emit light independently, and the light-emitting color may be different, so that color display may be directly realized. Alternatively, the light-emitting layer EL may also cover the pixel definition layer PDL and each first electrode ANO at the same time, that is, each light-emitting device OL may share the same light-emitting layer EL, at this time, the light-emitting color of each light-emitting device OL is the same, in order to realize color display, a color filter layer may be provided on the side of the light-emitting device OL away from the driving backplane BP, the color filter layer includes a plurality of filter areas, each filter area corresponds to a light-emitting device OL, the colors of different filter areas may be different, and each filter area may only transmit one monochromatic light, so that color display may be realized through the color filter layer.

[0078] The second electrode CAT may cover the light-emitting layer EL, and the second electrode CAT may be a continuous whole-layer structure, so that each light-emitting device OL may share the same second electrode CAT. The second electrode CAT may be recessed into the opening PH at a position corresponding to the opening PH. At the same time, the second electrode CAT may be the cathode of the light-emitting device OL, and it may adopt a light-transmitting structure, so that the light-emitting device OL may emit light in a direction away from the driving backplane BP. For example, the material of the second electrode CAT may be metal magnesium, silver or its alloy, etc., which can be conductive and light-transmitting at a certain thickness. At the same time, the first electrode ANO may be a light-opaque structure, so that the light-emitting device OL is a top-emitting structure.

[0079] The second electrode CAT may extend into the edge region and be connected to a common power signal line to receive a common power signal. The common power signal line may be arranged in the same layer as the first electrode ANO, and thus the second electrode CAT may be connected to the common power signal line in the edge region through a via penetrating the pixel definition layer PDLPDL. When displaying an image, a pixel power signal may be applied to the first electrode ANO through the pixel circuit control, and the pixel circuit may receive the pixel power signal through the pixel power line located in the second source and drain layer, and apply the common power signal to the second electrode CAT through the common power signal line, thereby stimulating the light-emitting layer EL to emit light. The specific principle of organic electroluminescence will not be described in detail here.

[0080] The arrangement of the light emitting devices OL is described below by way of example:

[0081] The display panel may include a plurality of light-emitting units, each of which may include a plurality of sub-units, and one sub-unit includes a light-emitting device OL. When displaying an image, adjacent light-emitting units may share at least one sub-unit, or may not share a sub-unit. The light-emitting colors of each sub-unit of the same light-emitting unit may be different. For example, the number of sub-units of a light-emitting unit is three, and the light-emitting colors are red, green and blue, respectively. Among them, in the same light-emitting unit, the area of ​​the sub-unit emitting blue light may be larger than the area of ​​the sub-unit emitting red light, and the area of ​​the sub-unit emitting red light may be larger than the area of ​​the sub-unit emitting green light; the area of ​​a sub-unit is the area of ​​the positive projection of the opening PH where its light-emitting device OL is located on the driving backplane BP.

[0082] For a light emitting device OL that needs to cooperate with a color filter to realize color display, a light emitting device OL and its corresponding filter area can be regarded as a subunit. For a light emitting device OL that does not need to cooperate with a color filter to realize color display, a light emitting device OL can be regarded as a subunit.

[0083] The shape of a subunit is the shape of the opening PH of the corresponding pixel definition layer PDL. For example, the same light-emitting unit may include four subunits, namely, a first subunit emitting blue light, a second subunit emitting red light, and two third subunits emitting green light. The area of ​​the first subunit is larger than that of the second subunit, and the area of ​​the second subunit is larger than that of the third subunit. In a light-emitting unit, two third subunits may be located between the first subunit and the second subunit. Each subunit may be represented by a corresponding light-transmitting hole, such as Fig.21 As shown, the first subunit corresponds to the light transmission hole LHB, the second subunit corresponds to the light transmission hole LHR, and the third subunit corresponds to the light transmission hole LHG. The range of the light transmission hole LHB is larger than the light transmission hole LHR, and the range of the light transmission hole LHR is larger than the light transmission hole LHG.

[0084] In addition, if Figure 1-Figure 3 As shown, the display panel may further include an encapsulation layer TFE, which may cover each light emitting device OL, and is used to protect the light emitting layer EL and prevent external water and oxygen from corroding the light emitting device OL. For example, the encapsulation layer TFE may be encapsulated by thin film encapsulation, and may include a first inorganic layer, an organic layer, and a second inorganic layer, wherein the first inorganic layer covers the side of the second electrode CAT away from the driving backplane BP, the organic layer may be arranged on the surface of the first inorganic layer away from the driving backplane BP, and the boundary of the organic layer is limited to the inner side of the boundary of the first inorganic layer, and the boundary of the positive projection of the organic layer on the driving backplane BP may be located in the peripheral area, ensuring that the organic layer can cover each light emitting device OL. The second inorganic layer may cover the organic layer and the first inorganic layer not covered by the organic layer, and the intrusion of water and oxygen may be blocked by the second inorganic layer, and the planarization may be achieved by the flexible organic layer.

[0085] like Figure 1-Figure 3 As shown, the display panel of the present disclosure may also include a touch layer TL, which may be arranged on the side of the encapsulation layer TFE away from the driving backplane BP and is used to sense touch operations. Taking the touch layer TL adopting a mutual capacitance touch structure as an example, the touch layer TL may include a plurality of first touch electrodes and a plurality of second touch electrodes, each of which is spaced apart along the row direction X, and a first touch electrode may include a plurality of first electrode blocks spaced apart along the column direction Y and a transfer bridge connecting two adjacent first electrode blocks; each second touch electrode is spaced apart along the column direction Y, and a second touch electrode includes a plurality of second electrode blocks connected in series along the row direction X; a transfer bridge crosses a second touch electrode and is insulated. Specifically, the touch layer TL may include: a buffer layer, a transfer layer, an isolation layer and an electrode layer, wherein:

[0086] The buffer layer can be arranged on the surface of the encapsulation layer TFE away from the driving backplane BP, and its material can be insulating materials such as silicon nitride and silicon oxide, which are not specifically limited here. The transfer layer can be arranged on the surface of the buffer layer away from the driving backplane BP, and include the above-mentioned transfer bridges distributed in a plurality of arrays. The transfer layer can be made of metal or other conductive materials. The isolation layer can cover the transfer layer, and the material of the isolation layer can be insulating materials such as silicon nitride and silicon oxide, which are not specifically limited here. The electrode layer is arranged on the surface of the isolation layer away from the driving backplane BP, and includes the above-mentioned first electrode block and second electrode block.

[0087] In addition, a flat layer may be covered on the touch layer TL to achieve flattening so as to form a film layer above the touch layer TL. The material of the flat layer may be resin or other transparent insulating materials, which are not particularly limited here. For example, the flat layer may cover the electrode layer.

[0088] In addition, in some embodiments of the present disclosure, the display panel may further include a polarizing layer, which may be disposed on the side of the touch layer TL away from the driving backplane BP. The polarizing layer is a circular polarizer that reduces reflection of external light. The specific principle will not be described in detail.

[0089] like Figure 1-Figure 3 As shown, the transparent cover plate CG of the present disclosure can be arranged on the side of the light emitting device OL away from the driving backplane BP. For example, the transparent cover plate CG covers the polarizing layer and can achieve flattening. The transparent cover plate CG is used to protect the film layer below. Its material can be transparent materials such as glass or acrylic, which is not specifically limited here.

[0090] Since the refractive index of the transparent cover plate CG is greater than that of the air. The incident angle of part of the light emitted by any light emitting device OL at the interface between the transparent cover plate CG and the air is greater than the critical angle of total reflection, so total reflection occurs and it cannot be emitted from the transparent cover plate CG to the air. The inventors found that the light that is totally reflected at the transparent cover plate CG is mainly the light at the edge of the light emitting range of the light emitting device OL. These light rays have a large angle with the light emitted in the direction perpendicular to the driving backplane BP, that is, they are more divergent, and it is easy to reach the critical angle of total reflection at the transparent cover plate CG. Among them, in some embodiments, the area of ​​the light emitting device OL that emits blue light is larger than that of the light emitting device OL that emits red light and filters light, and more light reaches the critical angle of total reflection, which makes the light extraction efficiency of blue light lower than that of red light and filtered light, which is easy to cause display anomalies such as color cast, and is not conducive to improving the overall brightness of the display panel.

[0091] Based on this, Figure 1-Figure 3As shown, the inventors can at least make the light rays at the edge of the light emitting range of the light emitting device OL converge toward the optical axis through the lens layer LE and the medium layer TM whose refractive index is greater than that of the lens layer LE, that is, reduce the angle between these light rays and the direction perpendicular to the driving backplane BP, thereby reducing the incident angle at the interface between the transparent cover plate CG and the air, avoiding reaching the critical angle of total reflection, and allowing normal emission without total reflection, thereby improving the light extraction efficiency.

[0092] The lens layer LE and the dielectric layer TM of the present disclosure are described in detail below:

[0093] like Figure 1-Figure 3 as well as Figure 6 and Fig.11 As shown in the figure, the lens layer LE is arranged on the side of the light emitting device OL away from the driving back plate BP, and the lens layer LE includes a separation lens Len1 and an intermediate lens Len2. The separation lens Len1 may be provided with a light-transmitting hole LH penetrating the lens layer LE. The light-transmitting hole LH may be surrounded by a plurality of side walls, and of course, may also be surrounded by a closed curved surface such as a circle or an ellipse. The intermediate lens Len2 may be arranged within the range surrounded by the light-transmitting hole LH, and may be spaced apart from the side wall of the light-transmitting hole LH, that is, the positive projection of a light-transmitting hole LH on the driving back plate BP surrounds the positive projection of an intermediate lens Len2 on the driving back plate BP, and there is a gap between the two.

[0094] like Figure 1-Figure 3 As shown, in the direction perpendicular to the driving back plate BP, an opening PH of the pixel definition layer PDL is arranged opposite to a light-transmitting hole LH and has the same shape, and the orthographic projections of an opening PH and a light-transmitting hole LH on the driving back plate BP at least partially overlap, and the orthographic projections have the same shape. For example, the orthographic projection of an opening PH on the driving back plate BP is located within the orthographic projection of a light-transmitting hole LH on the driving back plate BP. That is, one light-emitting device OL corresponds to one light-transmitting hole LH. Of course, one light-transmitting hole LH can also correspond to multiple light-emitting devices OL at the same time. The side walls of the light-transmitting hole LH and the opening PH expand in a direction away from the driving back plate BP, that is, the side walls of the light-transmitting hole LH and the opening PH are slopes that expand in a direction away from the driving back plate BP. The outer peripheral surface of the intermediate lens Len2 can shrink in a direction away from the driving back plate BP.

[0095] like Figure 1-Figure 3As shown, the dielectric layer TM can cover the lens layer LE and fill the light-transmitting hole LH. The surface of the dielectric layer TM away from the driving backplane BP can be a plane, that is, the dielectric layer TM can play a flattening role. Part of the light emitted by the light-emitting device OL can be irradiated to the side wall of the light-transmitting hole LH through the dielectric layer TM, that is, to the interface where the separation lens Len1 contacts the dielectric layer TM. Since the refractive index of the dielectric layer TM is greater than the refractive index of the lens layer LE, when the incident angle of the light reaches the critical angle of total reflection, total reflection can occur without passing through the isolation lens, so that at least part of the propagation direction of the light can be converged in the direction perpendicular to the driving backplane BP, thereby reducing the incident angle at the transparent cover plate CG, avoiding total reflection at the interface between the transparent cover plate CG and the air, and helping to improve the light extraction efficiency.

[0096] At the same time, if Figure 1-Figure 3 As shown, since the intermediate lens Len2 in the light-transmitting hole LH can refract part of the light from the light-emitting device OL, the light is further converged in a direction perpendicular to the driving backplane BP, further avoiding total reflection at the interface between the transparent cover plate CG and the air, which is beneficial to improving the light extraction efficiency.

[0097] The lens layer LE may be made of resin or other transparent insulating materials, and may be the same as the material of the pixel definition layer PDL, so as to be formed using a similar process. The dielectric layer TM may be made of silicon nitride, silicon oxide, and the like. For example, the refractive index of the lens layer LE may be 1.5, and the refractive index of the dielectric layer TM may be not less than 1.7 and not greater than 1.9.

[0098] In some embodiments of the present disclosure, Figure 1 and Figure 3 As shown, the lens layer LE can be arranged on the surface of the second electrode CAT away from the driving back plate BP, wherein the orthographic projection of the separation lens Len1 on the driving back plate BP is located within the range covered by the pixel definition layer PDL, and the intermediate lens Len2 can be located in the opening PH. That is, the separation lens Len1 corresponds to the area outside the light-emitting device OL, and the intermediate lens Len2 corresponds to the light-emitting device OL. At the same time, since the second electrode CAT can be recessed at the opening PH, at least a part of the intermediate lens Len2 can be located on the side of the separation lens Len1 close to the driving back plate BP. The dielectric layer TM covers the lens layer LE and the second electrode CAT not covered by the lens layer LE, and the surface of the lens dielectric layer away from the driving back plate BP can be a plane. In addition, the encapsulation layer TFE can cover the dielectric layer TM.

[0099] In some embodiments of the present disclosure, Figure 2As shown, the lens layer LE can cover the touch layer TL, that is, the lens layer LE can cover the electrode layer of the touch layer TL, and at the same time, the dielectric layer TM can be used to replace the flat layer covering the touch layer TL, so as to simplify the structure. The polarizing layer can cover the dielectric layer TM, and the transparent cover plate CG can be arranged on the side of the polarizing layer away from the driving backplane BP.

[0100] In some embodiments of the present disclosure, the lens layer LE can be disposed on the surface of the second electrode CAT away from the driving backplane BP, and the first inorganic layer of the encapsulation layer TFE can be used as the dielectric layer TM, and the thickness of the first inorganic layer can be not less than 2 μm.

[0101] In addition, in other embodiments of the present disclosure, the lens layer LE may also be disposed on the surface of the encapsulation layer TFE away from the driving backplane BP, and the touch layer TL may be disposed on the side of the dielectric layer TM away from the driving backplane BP. The position of the lens layer LE is not particularly limited here.

[0102] The specific structures of the light transmission hole LH and the intermediate lens Len2 are described in detail below:

[0103] like Figure 1-Figure 3 As shown, part of the light emitted by the light emitting device OL within the coverage of the intermediate lens Len2 can be emitted from the outer peripheral surface of the intermediate lens Len2, and a refraction occurs at the interface between the outer peripheral surface and the dielectric layer TM. The refracted light converges in a direction perpendicular to the driving back plate BP, so as to be totally reflected at the side wall of the light-transmitting hole LH. At the same time, part of the light emitted by the light emitting device OL corresponding to a light-transmitting hole LH can pass through the outer peripheral surface of the intermediate lens Len2, and two refractions occur during the penetration process. The two refractions can make the light converge in a direction perpendicular to the driving back plate BP, and can also increase the number of light that is totally reflected at the side wall of the light-transmitting hole LH, which is ultimately beneficial to improving the light extraction efficiency.

[0104] In some embodiments of the present disclosure, in an intermediate lens Len2 within an opening PH and its corresponding light-transmitting hole LH, the orthographic projection of the intermediate lens Len2 on the driving back plate BP covers the center of the orthographic projection of the opening PH on the driving back plate BP, that is, the intermediate lens Len2 covers the center of the light-emitting range of the light-emitting device OL. At the same time, the center of the orthographic projection of the light-transmitting hole LH on the driving back plate BP may coincide with the center of the orthographic projection of the corresponding opening PH on the driving back plate BP, and the shape of the light-transmitting hole LH may be the same as the shape of the corresponding opening PH, that is, the shape of the light-transmitting hole LH may be the same as the shape of the corresponding light-emitting device OL.

[0105] The following is an exemplary description taking the middle lens Len2 covering the center of the light emitting range of the light emitting device OL as an example:

[0106] like Figure 6-Figure 10As shown, the light-transmitting hole LH may be surrounded by a plurality of side walls, and the side walls may be flat or curved. The outer peripheral surface of the intermediate lens Len2 may be surrounded by a plurality of side surfaces, and at least one of the lens side surfaces is parallel to the orthographic projection of at least one side wall of the light-transmitting hole LH on which it is located on the driving back plate BP, that is, at least a portion of the contour of the orthographic projection of a side wall on the driving back plate BP is parallel to at least a portion of the contour of the orthographic projection of a lens side surface on the driving back plate BP. In this article, the lens side surface and side wall having such a parallel relationship may be defined as parallel lens side surfaces and side walls, and the light emitted from the lens side surface of the intermediate lens Len2 may be irradiated onto the parallel side walls.

[0107] In some embodiments of the present disclosure, the outer peripheral surface of the intermediate lens Len2 may be the same shape as the light-transmitting hole LH in which it is located on the driving back plate BP. For example, the orthographic projections of the intermediate lens Len2 and the light-transmitting hole LH on the driving back plate BP may both be polygons, and the lens side surfaces of the intermediate lens Len2 are arranged one-to-one with the side walls of the light-transmitting hole LH.

[0108] In some embodiments of the present disclosure, Figure 6 As shown, the width of the light transmission hole LH in the row direction X is smaller than the length in the column direction Y. Corresponding to the shape of the light transmission hole LH, the width of the intermediate lens Len2 in the light transmission hole LH in the row direction X is smaller than the length in the column direction Y. The width of the light transmission hole LH in the row direction X is the distance between the two points that are farthest apart in the row direction X, that is, the maximum width in the row direction X. The length of the light transmission hole LH in the column direction Y is the distance between the two points that are farthest apart in the column direction Y, that is, the maximum length in the column direction Y.

[0109] The width of the middle lens Len2 in the row direction X is the distance between the two points on its outer circumference that are the farthest apart in the row direction X, that is, the maximum width in the row direction X. The length of the middle lens Len2 in the column direction Y is the distance between the two points on its outer circumference that are the farthest apart in the column direction Y, that is, the maximum length in the column direction Y.

[0110] Further, such as Figure 6 As shown, the intermediate lens Len2 may be a strip structure extending along the column direction Y. In order to increase the total reflection of the side wall of the light-transmitting hole LH while minimizing the obstruction of the intermediate lens Len2 itself to the light emitted by the light-emitting device OL, the size of the light-transmitting hole and the intermediate lens Len2 may be restricted to a certain extent. For example:

[0111] In the row direction X, the ratio of the width b1 of the intermediate lens Len2 to the width b2 of the light transmission hole LH where the intermediate lens Len2 is located is not less than 10% and not more than 50%. Furthermore, b1 / b2 is not less than 15% and not more than 20%.

[0112] In the column direction Y, the ratio of the length a1 of the intermediate lens Len2 to the length a2 of the light transmission hole LH where the intermediate lens Len2 is located is not less than 30% and not more than 80%. Furthermore, a1 / a2 is not less than 50% and not more than 60%.

[0113] like Figure 6 As shown, in order to increase the area of ​​the outer peripheral surface of the intermediate lens Len2 and facilitate light emission, the two lens side surfaces of the intermediate lens Len2 can be provided with a plurality of recessed portions GR distributed at intervals, so that the outer peripheral surface of the intermediate lens Len2 is uneven, and the depths of the recessed portions GR can be the same. Based on the recessed portions GR, the size of the intermediate lens Len2 can be further limited:

[0114] In the row direction X, the ratio of the depth b3 of the recessed portion GR to the width b1 of the intermediate lens Len2 is not less than 10% and not more than 40%. Further, b3 / b1 is not less than 20% and not more than 25%. The depth of the recessed portion GR may be the distance in the row direction X between the recessed portion GR and the point farthest from the non-recessed region.

[0115] In the column direction Y, the ratio of the distance a3 between one end of the intermediate lens Len2 and the lowest point of a recessed portion GR closest to the end to the length a1 of the intermediate lens Len2 is not less than 10% and not more than 50%. Further, a3 / a1 is not less than 25% and not more than 33%. The lowest point of the recessed portion GR is the point with the greatest depth, that is, the point farthest from the non-recessed area in the row direction X.

[0116] In some embodiments of the present disclosure, Figure 6 As shown, the outer peripheral surface of the intermediate lens Len2 can be formed by a plurality of curved lens side surfaces connected smoothly, so that the outer peripheral surface of the intermediate lens Len2 has no sharp edges. In addition, in order to ensure the uniformity of the light emitted from the intermediate lens Len2 to both sides, the positive projection of the intermediate lens Len2 on the driving back plate BP is an axisymmetric figure, and the symmetry axis is a straight line passing through the center of the positive projection of the light-transmitting hole LH on the driving back plate BP along the column direction Y, and the two lens side surfaces of the intermediate lens Len2 can be symmetrical about the symmetry axis. For example, one lens side surface of the intermediate lens Len2 has two recessed portions GR, and they are symmetrically arranged about the symmetry axis.

[0117] Of course, the intermediate lens Len2 can also be in other forms, for example, Figure 7 and Figure 8As shown, in some embodiments of the present disclosure, the intermediate lens Len2 may include a plurality of extensions Lenc distributed radially, the number of the extensions Lenc may be three, four or more, and each extension Lenc may converge in the same area, the orthographic projection of the area on the driving back plate BP covers the center of the orthographic projection of the light-transmitting hole LH on the driving back plate BP. At the same time, at least one extension Lenc is parallel to the orthographic projection of a side wall of the light-transmitting hole LH on the driving back plate BP, that is, at least part of the contour of the orthographic projection of at least one extension Lenc on the driving back plate BP is parallel to at least part of the contour of the orthographic projection of a side wall of the light-transmitting hole LH on the driving back plate BP, that is, the extension direction of at least one extension Lenc is parallel to the extension direction of a side wall of the light-transmitting hole LH. For ease of description, the extension Lenc whose orthographic projection has this parallel relationship with the side wall of the light-transmitting hole LH is defined herein as the extension Lenc being parallel to the side wall. In order to facilitate the light passing through the outer peripheral surface of the intermediate lens Len2 to propagate toward the side wall of the light transmission hole LH, each extension portion Lenc can be arranged parallel to a side wall of the light transmission hole LH where it is located. Of course, the number of extension portions Lenc can be less than the number of side walls of the light transmission hole LH where they are located.

[0118] The following is an exemplary description based on the hexagonal light-transmitting hole LH:

[0119] like Figure 6 As shown, in one embodiment of the present disclosure, the orthographic projection of the light transmission hole LH on the driving back plate BP is a hexagon, and the shape of the opening PH is the same as that of the light transmission hole LH. Accordingly, the light transmission hole LH has six side walls, that is, the light transmission hole LH is surrounded by six planar side walls FW, of which two planar side walls FW extend along the column direction Y, and at least part of the contour of the orthographic projection on the driving back plate BP is arranged in parallel.

[0120] The middle lens Len2 may extend along the central axis passing through the center of the light transmission hole LH, and the outer peripheral surface of the middle lens Len2 has four recessed portions GR, and the four recessed portions GR are symmetrically distributed on both sides of the central axis, and the outer peripheral surface of the middle lens Len2 is a smooth curved surface.

[0121] like Figure 7 As shown, in one embodiment of the present disclosure, the middle lens Len2 may include three extension portions Lenc, one extension portion Lenc is parallel to two planar side walls FW extending along the column direction Y. The two extension portions Lenc are respectively arranged parallel to the other two planar side walls FW. That is, the three extension portions Lenc may form a "Y"-shaped structure.

[0122] like Figure 8As shown, in one embodiment of the present disclosure, the middle lens Len2 may include four extension portions Lenc, wherein two extension portions Lenc extend in the same direction and are parallel to a planar side wall FW, and the other two extension portions Lenc extend in the same direction and are parallel to another planar side wall FW, that is, the four extension portions Lenc may form an "X" shaped structure.

[0123] After the above Figure 6-Figure 8 The light extraction rate in the implementation method of the present invention is simulated, and the prior art and Figure 6-Figure 8 The light extraction rate of the implementation method is shown in the following table:

[0124] plan Light extraction rate Prior art 10.20％ Figure 6 Implementation 11.75％ Figure 7 Implementation 12.38％ Figure 8 Implementation 12.01％

[0125] It can be seen that the use of the present disclosure Figure 6-Figure 8 After the implementation of the method, the light output rate of the display monitor has been improved.

[0126] like Fig. 9 and Fig.10 As shown, in some embodiments of the present disclosure, the side wall of the light transmission hole LH may include two plane side walls FW and one curved side wall CW, and the light transmission hole LH may be surrounded by the two plane side walls FW and one curved side wall CW, and its orthographic projection on the driving back plate BP may be fan-shaped. Correspondingly, the outer peripheral surface of the intermediate lens Len2 may be surrounded by two plane side surfaces and one curved side surface, and the two plane side surfaces are respectively parallel to the two plane side walls FW. Fig. 9 As shown, the curved side surface and the curved side wall CW are arc surfaces with the same curvature. Fig.10 As shown, the curved side surface may also be a wavy curved surface, that is, it may have a protrusion protruding toward the curved side wall CW. Of course, a curved surface may also be used.

[0127] In addition, if Figure 3 As shown, since the light-transmitting hole LH is a fan-shaped structure, when the light-transmitting hole LH is formed in the lens layer LE, the slope β of the curved side wall CW is greater than the slope α of the flat side wall FW, that is, β is greater than α. Since the intermediate lens Len2 can make the light emitted from its curved side more convergent, the light irradiated to the curved side wall CW can be more easily totally reflected, which is beneficial to reduce the total reflection at the transparent cover plate CG. Of course, the lens layer LE can also be formed by a half-tone mask, and the slope of the curved side wall CW is greater than the slope of the flat side wall FW.

[0128] The following is an exemplary description using the example that the middle lens Len2 does not cover the center of the light emitting range of the light emitting device OL:

[0129] like Figure 11-Figure 16As shown, in some embodiments of the present disclosure, the side wall of the light transmission hole LH may include two plane side walls FW and one curved side wall CW, and the light transmission hole LH may be surrounded by two plane side walls FW and one curved side wall CW, and its orthographic projection on the driving back plate BP may be fan-shaped. Correspondingly, the outer peripheral surface of the intermediate lens Len2 may be surrounded by two plane side surfaces and one curved side surface, and the two plane side surfaces are respectively parallel to the two plane side walls FW. In addition, since the light transmission hole LH is a fan-shaped structure, when the light transmission hole LH is formed in the lens layer LE, the slope β of the curved side wall CW is greater than the slope α of the plane side wall FW. Since the intermediate lens Len2 can make the light emitted from its curved side surface more convergent, the light irradiated to the curved side wall CW can be more easily totally reflected, which is beneficial to reduce the total reflection at the transparent cover plate CG. Of course, the lens layer LE can also be formed by a half-tone mask, and the slope of the curved side wall CW is made greater than the slope of the plane side wall FW.

[0130] The center of the light emitting device OL corresponds to the center of the light transmission hole LH. Since a large proportion of the light emitted from the center and the periphery of the light emitting device OL is not totally reflected on the side wall of the light transmission hole LH, especially the problem of not totally reflecting on the curved side wall CW is more obvious, therefore, in order to minimize the blocking of light while increasing the total reflection of the side wall of the light transmission hole LH, the intermediate lens Len2 can be a strip structure, and the intermediate lens Len2 is located between the center of the light transmission hole LH and the curved side wall CW. The focus is on using the refraction of light by the intermediate lens Len2 to make the light emitted by the light emitting device OL totally reflected on the curved side wall CW. At the same time, the intermediate lens Len2 can block the light emitting device OL as little as possible, thereby maximizing the light output rate. It should be noted that the aforementioned intermediate lens Len2 can increase the total reflection at the curved side wall CW, which does not mean that it can only increase the total reflection at the curved side wall CW. Due to the existence of the intermediate lens Len2, for the light emitted by the light-emitting device OL and passing through the outer peripheral surface of the intermediate lens Len2, at least part of the light can be totally reflected at the side wall of the light-transmitting hole LH, thereby improving the light extraction efficiency as a whole. Of course, the curved side surface can also be a wavy curved surface or other curved surface, but the shape formed by it and the two flat side surfaces can still be regarded as a fan shape.

[0131] like Fig.11 As shown, in some embodiments of the present disclosure, the strip-shaped intermediate lens Len2 can be an arc-shaped strip-shaped structure extending along the curved side wall CW parallel to the light-transmitting hole LH where it is located, so that light can be irradiated from the arc-shaped strip-shaped structure to the curved side wall CW. In addition, the curvature of the curved side surface of the intermediate lens Len2 and the curved side wall CW can be the same. The parallel mentioned in this article is not limited to the non-intersection between two straight lines or planes, but also includes the non-intersection between two curved surfaces or other curved surfaces.

[0132] like Figure 12-14 As shown, in some embodiments of the present disclosure, the strip-shaped intermediate lens Len2 may include a first segment L1 and a second segment L2 connected at a specified angle, and the specified angle may be an obtuse angle, so that the extension trajectory of the intermediate lens Len2 is substantially the same as the trajectory of the curved side wall CW. The first segment L1 and the second segment L2 are symmetrically arranged about the central axis passing through the center of the light-transmitting hole LH along the column direction Y, that is, the shape of the orthographic projection of the intermediate lens Len2 on the driving backplane BP is an axisymmetric figure. Among them, as Fig.12 As shown, the side surfaces of the first section L1 and the second section L2 may be planes. Fig.13 As shown, the side surfaces of the first section L1 and the second section L2 may be curved surfaces, such as wavy surfaces. Fig.14 As shown, one side of the first segment L1 is a plane, and the other side is a curved surface, and the distance between the two side surfaces of the first segment L1, that is, the thickness of the first segment L1 decreases toward the second segment L2, and the first segment L1 and the second segment L2 are symmetrically arranged, and their shapes are also symmetrically arranged.

[0133] In some embodiments of the present disclosure, Fig.15 As shown in FIG. 1 , the middle lens Len2 may extend along an arc-shaped track, and its two side surfaces may be wavy surfaces. Fig.16 As shown, the intermediate lens may also extend along a straight line, and its two side surfaces may be curved surfaces. Of course, they may also be flat surfaces.

[0134] like Figure 17-Figure 20 As shown, in some embodiments of the present disclosure, the orthographic projection of the light-transmitting hole LH on the driving back plate BP may be a polygon, a sector or other shape as mentioned above. The intermediate lens Len2 may be annular and surround the center of the light-transmitting hole LH where it is located. The shape of the outer peripheral surface of the intermediate lens Len2 may be the same as the shape of the light-transmitting hole LH, for example: Fig.18 As shown, the outer peripheral surface of the intermediate lens Len2 and the light-transmitting hole LH are both fan-shaped. The fan-shaped structure can refer to the above description and will not be described in detail here.

[0135] exist Fig.18 On the basis of Fig.19 As shown, when the middle lens Len2 is fan-shaped, the curved side surface thereof may have a protrusion protruding outward, or the curved side surface may be a wavy surface.

[0136] like Fig. 20 As shown, in order to increase the area of ​​the side wall of the light transmission hole LH, Fig.19 On this basis, a convexity can be provided on the curved side wall CW of the light transmission hole LH corresponding to the convexity of the curved side surface of the intermediate lens Len2, so that the shape of the light transmission hole LH is the same as that of the intermediate lens Len2.

[0137] The middle lens Len2 can make the center of the light-emitting device OL coincide with the orthographic projection of the center of the light-transmitting hole LH on the driving backplane BP, so that the light emitted from the center and the periphery of the light-emitting device OL can illuminate the side wall of the light-transmitting hole LH after passing through the middle lens Len2, and the proportion of total reflection is increased, thereby improving the overall light extraction efficiency.

[0138] like Fig.19 and Fig. 20 , the intermediate lens Len2 can be a continuous closed ring, such as Fig.18 As shown, it may also include a plurality of lens units Lenp distributed at intervals around the center of the light transmission hole LH where it is located, the lens unit Lenp may be a strip structure, the intermediate lens Len2 may be an intermittent annular structure, and the extension direction of at least a portion of the lens unit Lenp may be parallel to a portion of the side wall of the light transmission hole LH. For example, the intermediate lens Len2 and the light transmission hole LH are both hexagonal, and the intermediate lens Len2 includes six lens units Lenp, and each lens unit Lenp is parallel to a side wall of the light transmission hole LH.

[0139] It should be noted that the above description of the intermediate lens Len2 and the light-transmitting hole LH is based on an example of one light-transmitting hole LH and the intermediate lens Len2 located in the light-transmitting hole LH, and does not limit the intermediate lens Len2 to be disposed in all light-transmitting holes LH. For example:

[0140] like Fig.21 As shown, in some embodiments of the present disclosure, the area of ​​the light-emitting device OL emitting blue light is larger than that of the light-emitting device OL emitting red light and filtering light, and the intermediate lens Len2 of any of the above embodiments can be set only in the light-transmitting hole LH corresponding to the light-emitting device OL emitting blue light, while the intermediate lens Len2 may not be set in the light-transmitting hole LH corresponding to the light-emitting device OL emitting red light and green light. Of course, in other embodiments of the present disclosure, the intermediate lens Len2 can be set in the light-transmitting hole LH corresponding to each light-emitting device OL.

[0141] The present disclosure provides a method for manufacturing a display panel. The display panel may be a display panel of any embodiment described above. The manufacturing method may include steps S110 to S150, wherein:

[0142] Step S110: forming a driving backplane.

[0143] Step S120, forming a pixel definition layer and a plurality of light-emitting devices distributed at intervals on one side of the driving backplane; the pixel definition layer has a plurality of openings that define the range of each light-emitting device in a one-to-one correspondence.

[0144] Step S130, forming a lens layer including a separation lens and an intermediate lens on a side of the light-emitting device away from the driving backplane, the separation lens is provided with a light-transmitting hole, the intermediate lens is arranged in a range surrounded by the light-transmitting hole, and is spaced apart from the side wall of the light-transmitting hole; in a direction perpendicular to the driving backplane, an opening is arranged opposite to a light-transmitting hole; the light-transmitting hole and the opening expand in a direction away from the driving backplane, and the outer peripheral surface of the intermediate lens contracts in a direction away from the driving backplane.

[0145] Step S140: forming a dielectric layer covering the lens layer and filling the light-transmitting holes, wherein the refractive index of the dielectric layer is greater than the refractive index of the lens layer.

[0146] Step S150: forming a transparent cover plate on a side of the dielectric layer away from the driving backplane.

[0147] In some embodiments of the present disclosure, Figure 2 and 22 As shown, in step S130, for the above-mentioned fan-shaped light-transmitting hole solution, the slope β of the curved side wall CW can be made the same as the slope α of the plane side wall FW by using a half-tone mask HTM. Specifically, when forming the lens layer LE, a negative photoresist can be used to form the lens material layer LEL, and then the lens material layer is exposed and developed using the half-tone mask HTM, wherein the half-tone mask HTM has a light-transmitting area, a semi-light-transmitting area HTA and a light-shielding area TA, the light-shielding area TA corresponds to the area where the light-transmitting hole LH is to be formed, the light-transmitting area corresponds to the area (including the plane side wall FW) where the separation lens Len1 is to be formed, and the semi-light-transmitting area HTA corresponds to the area of ​​the curved side wall CW; due to the presence of the semi-light-transmitting area HTA, the corrosion degree of the developer on the curved side wall CW can be enhanced, thereby reducing the slope β of the curved side wall CW, making it substantially equal to the slope α of the plane side wall FW, and of course, they can also be the same, for example, both are 59°. Of course, the slope β of the curved side wall CW and the slope α of the flat side wall can be made consistent with each other in other ways. The reduction of the slope β is conducive to increasing the incident angle of the light emitted from the light emitting device OL on the side wall of the light transmission hole LH, which is convenient for total reflection.

[0148] It should be noted that Fig. 22 This is only a schematic diagram for explaining the process principle and does not constitute a limitation on the actual structure of the product during the execution of step S130.

[0149] The details of other steps of the above manufacturing method and the beneficial effects of the manufacturing method can be referred to the above implementation of the display panel, and will not be described in detail here.

[0150] It should be noted that, although the steps of the manufacturing method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0151] The present disclosure also provides a display device, which may include a touch display panel of any of the above embodiments. The touch display panel is a display panel of any of the above embodiments, and its specific structure and beneficial effects can be referred to the embodiments of the display panel above, which will not be repeated here. The display device of the present disclosure can be an electronic device with a display function such as a mobile phone, a tablet computer, a television, etc., which will not be listed one by one here.

[0152] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display panel, wherein: include: Driver backplane; A plurality of light emitting devices are distributed at intervals on a side surface of the driving backplane; A pixel definition layer, which is disposed on the same side of the driving backplane as the light-emitting device and has a plurality of openings, wherein each of the openings defines a range of each of the light-emitting devices in a one-to-one correspondence; A lens layer is provided on a side of the light emitting device away from the driving backplane, the lens layer comprises a separation lens and an intermediate lens, the separation lens is provided with a light-transmitting hole, the intermediate lens is provided within a range surrounded by the light-transmitting hole and is spaced apart from the side wall of the light-transmitting hole; in a direction perpendicular to the driving backplane, one of the openings is arranged opposite to one of the light-transmitting holes; the light-transmitting hole and the opening expand in a direction away from the driving backplane, and the outer peripheral surface of the intermediate lens contracts in a direction away from the driving backplane; a dielectric layer, covering the lens layer and filling the light-transmitting hole, wherein the refractive index of the dielectric layer is greater than the refractive index of the lens layer; The transparent cover plate is arranged on a side of the dielectric layer away from the driving back plate.

2. The display panel according to claim 1, wherein: The light emitting device comprises a first electrode, a light emitting layer and a second electrode which are sequentially stacked in a direction away from the driving backplane; The first electrodes of the light-emitting devices are distributed at intervals and exposed by the openings one by one; the light-emitting devices share the same second electrode; the second electrode covers the side of the pixel definition layer away from the driving backplane and is recessed into the opening; the lens layer is provided on the side of the second electrode away from the driving backplane; The orthographic projection of the separation lens on the driving backplane is located within the range covered by the pixel definition layer, and the middle lens is located in the opening.

3. The display panel according to claim 1, wherein: The display panel further includes: An encapsulation layer, covering each of the light-emitting devices; The touch layer is arranged on the surface of the packaging layer away from the driving back plate; the lens layer covers the touch layer; and the transparent cover is located on the side of the touch layer away from the driving back plate.

4. The display panel according to any one of claims 1 to 3, wherein: In the intermediate lens in one of the openings and the corresponding light-transmitting hole, the orthographic projection of the intermediate lens on the driving backplane covers the center of the orthographic projection of the opening on the driving backplane.

5. The display panel according to any one of claims 1 to 3, wherein: The light-transmitting hole is surrounded by a plurality of side walls; the outer peripheral surface of the intermediate lens includes at least one lens side surface which is parallel to the orthographic projection of at least one side wall of the light-transmitting hole where the intermediate lens is located on the driving backplane.

6. The display panel according to any one of claims 1 to 3, wherein: The width of the light-transmitting hole in the row direction is smaller than the length in the column direction; the width of the intermediate lens in the row direction is smaller than the length in the column direction.

7. The display panel according to claim 6, wherein: The intermediate lens is a strip-shaped structure extending along the column direction; In the row direction, the ratio of the width of the intermediate lens to the width of the light-transmitting hole in which it is located is not less than 10% and not more than 50%; In the column direction, the ratio of the length of the intermediate lens to the length of the light-transmitting hole where the intermediate lens is located is not less than 30% and not more than 80%.

8. The display panel according to claim 7, wherein: The side surfaces of the two lenses of the intermediate lens each have a plurality of recessed portions distributed at intervals; In the row direction, the ratio of the depth of the recessed portion to the width of the intermediate lens is not less than 20% and not more than 25%; In the column direction, the ratio of the distance between one end of the intermediate lens and the lowest point of the recessed portion closest to the end to the length of the intermediate lens is not less than 10% and not more than 50%.

9. The display panel according to claim 7, wherein: The outer peripheral surface of the intermediate lens is formed by a plurality of curved lens side surfaces that are smoothly connected.

10. The display panel according to claim 5, wherein: The intermediate lens comprises a plurality of extensions distributed in a radial shape, and at least one of the extensions is parallel to the orthographic projection of a side wall of the light-transmitting hole where the extension is located on the driving back plate.

11. The display panel according to any one of claims 1 to 3, wherein: The outer peripheral surface of the intermediate lens has the same shape as the light-transmitting hole where it is located on the driving back plate.

12. The display panel according to any one of claims 1 to 3, wherein: The light-transmitting hole is surrounded by two plane side walls and one curved side wall; the outer peripheral surface of the intermediate lens is surrounded by two plane side surfaces and one curved side surface; The two planar side surfaces are respectively parallel to the orthographic projections of the two planar side walls on the driving backplane.

13. The display panel according to any one of claims 1 to 3, wherein: The light-transmitting hole is surrounded by two planar side walls and one curved side wall; The intermediate lens is a strip-shaped structure, and the intermediate lens is located between the center of the light-transmitting hole where the intermediate lens is located and the curved side wall.

14. The display panel according to claim 13, wherein: The intermediate lens includes a first segment and a second segment connected at a specified angle, and the first segment and the second segment are symmetrically arranged about a central axis passing through the center of the light-transmitting hole along a column direction.

15. The display panel according to claim 13, wherein: The intermediate lens is an arc-shaped strip structure extending parallel to the curved side wall of the light-transmitting hole where the intermediate lens is located.

16. The display panel according to any one of claims 1 to 3, wherein: The intermediate lens is annular and surrounds the center of the light-transmitting hole where it is located.

17. The display panel according to claim 16, wherein: The intermediate lens includes a plurality of lens units spaced apart and distributed around the center of the light-transmitting hole where the intermediate lens is located.

18. The display panel according to claim 12, wherein: The slope of the curved side wall is the same as the slope of the planar side wall.

19. A method for manufacturing a display panel, wherein: include: forming a driving backplane; Forming a pixel definition layer and a plurality of light-emitting devices distributed at intervals on one side of the driving backplane; The pixel definition layer has a plurality of openings which define the range of each of the light emitting devices in a one-to-one correspondence; A lens layer including a separation lens and an intermediate lens is formed on a side of the light emitting device away from the driving backplane, the separation lens is provided with a light-transmitting hole, the intermediate lens is provided within a range surrounded by the light-transmitting hole and is spaced apart from the side wall of the light-transmitting hole; in a direction perpendicular to the driving backplane, one of the openings is provided opposite to one of the light-transmitting holes; the light-transmitting holes and the opening sizes expand in a direction away from the driving backplane, and the outer peripheral surface of the intermediate lens shrinks in a direction away from the driving backplane; forming a dielectric layer covering the lens layer and filling the light-transmitting hole, wherein the refractive index of the dielectric layer is greater than the refractive index of the lens layer; A transparent cover plate is formed on a side of the dielectric layer away from the driving backplane.

20. A display device, wherein: A display panel comprising any one of claims 1-18.

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