CN114488559B

CN114488559B - Display panel, preparation method thereof and display device

Info

Publication number: CN114488559B
Application number: CN202011271307.7A
Authority: CN
Inventors: 宋梦亚; 李多辉; 郭康; 张笑; 张锋; 王美丽; 谷新; 姚琪; 袁广才; 董学
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2024-08-23
Anticipated expiration: 2040-11-13
Also published as: CN114488559A

Abstract

The invention provides a display panel, a preparation method thereof and a display device, and relates to the technical field of display. The display panel comprises a pixel layer, a flat layer, a lens array and a cover plate which are sequentially stacked; the flat layer is positioned on the light emergent side of the pixel layer, and the distance between the flat layer and the cover plate is larger than the maximum thickness of the lens array along the direction perpendicular to the flat layer; the display panel further includes a hollow structure between the lens array and the cover plate, the hollow structure being filled with a gas. The invention is suitable for manufacturing the display panel.

Description

Display panel, preparation method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.

Background

The naked eye 3D display device can enable people to watch stereoscopic images with vivid images without wearing glasses. In the naked eye 3D display device, light rays are modulated through the lens array and the low-refractive-index glue material layer, so that 3D display is realized.

Generally, the low refractive index glue layer is disposed on the light emitting surface of the lens array, and the refractive index of the low refractive index glue layer is smaller than that of the lens array. The refractive index parameter selection range of the existing low refractive index adhesive layer is limited; after the refractive index of the lens array material is selected, the adjustable range of the difference delta n between the refractive index of the lens array and the refractive index of the low-refractive-index adhesive layer is smaller, and the smaller adjustable range of delta n can cause smaller adjustable ranges of the curvature radius R and the camber h of the lens array, so that the manufacturing process difficulty of the lens array is greatly improved, the production cost is increased, and the production efficiency is reduced.

Disclosure of Invention

The embodiment of the invention provides a display panel, a preparation method thereof and a display device, the display panel can reduce the manufacturing process difficulty of the lens array, further reduce the production cost and improve the production efficiency.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:

In one aspect, there is provided a display panel including: the pixel layer, the flat layer, the lens array and the cover plate are sequentially stacked; the flat layer is positioned on the light emergent side of the pixel layer, and the distance between the flat layer and the cover plate is larger than the maximum thickness of the lens array along the direction perpendicular to the flat layer.

The display panel further includes a hollow structure between the lens array and the cover plate, the hollow structure being filled with a gas.

Optionally, the display panel further includes a supporting layer, and the supporting layer is located between the flat layer and the cover plate and is used for supporting the cover plate.

Optionally, the support layer includes a plurality of support portions, and a plurality of the support portions are disposed around the lens array.

Optionally, the support layer includes a plurality of supports, and the lens array includes a plurality of lens structures; the support is located between a plurality of the lens structures.

Optionally, a gap is formed between two adjacent lens structures; the support is located in the gap.

Optionally, the planarization layer includes a first planarization layer and a second planarization layer that are stacked, and a light absorbing layer between the first planarization layer and the second planarization layer, the first planarization layer being adjacent to the pixel layer; the front projection of the light absorbing layer on the cover plate and the front projection of the lens structure on the cover plate are not overlapped or partially overlapped.

Optionally, two adjacent lens structures are connected to each other, and an orthographic projection of the supporting portion on the cover plate overlaps with an orthographic projection of the lens structure on the cover plate.

Optionally, the shape of the support part is a cone, and an apex of the cone is located between two adjacent lens structures.

Optionally, the cover plate comprises a cover plate body and a supporting part which are connected, and the supporting part is arranged around the periphery of the cover plate body.

The cover plate body covers the lens array, and the supporting part is used for supporting the cover plate body to form the hollow structure.

Optionally, the display panel further includes a light emitting layer, and the pixel layer is located at a light emitting side of the light emitting layer.

In another aspect, embodiments of the present invention provide a display device including the display panel as described above.

In still another aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including:

Forming a pixel layer, a flat layer, a lens array and a cover plate which are stacked; wherein a hollow structure is formed between the lens array and the cover plate; the hollow structure is filled with gas; the distance between the flat layer and the cover plate is greater than the maximum thickness of the lens array along the direction perpendicular to the flat layer.

The embodiment of the invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a pixel layer, a flat layer, a lens array and a cover plate which are sequentially stacked; the flat layer is positioned on the light emergent side of the pixel layer, and the distance between the flat layer and the cover plate is larger than the maximum thickness of the lens array along the direction perpendicular to the flat layer; the display panel further includes a hollow structure between the lens array and the cover plate, the hollow structure being filled with a gas.

The hollow structure of the display panel is filled with gas, and the refractive index of the gas is far smaller than that of the low refractive index glue material layer in the related technology; then, the range of the difference delta n between the refractive index of the lens array and the refractive index of the gas is enlarged, and the selectable range of the refractive index of the lens array is enlarged after the refractive index of the gas is determined, so that the process parameter adjustment range of the lens array is widened, the manufacturing difficulty of the lens array is reduced, the production cost is further reduced, and meanwhile, the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a first display panel according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second display panel according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third display panel according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fourth display panel according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a fifth display panel according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a sixth display panel according to an embodiment of the present invention;

fig. 7-10 are schematic views of an intermediate structure of a manufacturing process of a display panel according to an embodiment of the present invention;

FIGS. 11-13 are schematic views illustrating an intermediate structure of a manufacturing process of another display panel according to an embodiment of the present invention;

Fig. 14 is a schematic structural diagram of a supporting layer and a cover plate according to an embodiment of the invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the embodiments of the present invention, unless otherwise indicated, the meaning of "plurality" is two or more; the orientation or positional relationship indicated by the term "upper" or the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and simplification of description, and does not indicate or imply that the structures or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

In embodiments of the present invention, the terms "coupled," "coupled," and "connected" are to be construed broadly, as well as being either permanently coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

In order to clearly describe the technical solution of the embodiments of the present invention, in the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", etc. do not limit the number and execution order.

In the naked eye 3D display device, light rays are modulated through the lens array and the low-refractive-index glue material layer, so that a 3D display function is realized. Generally, the low refractive index glue layer is disposed on the light emitting surface of the lens array, and the refractive index of the low refractive index glue layer is smaller than that of the lens array. The refractive index of the existing materials for manufacturing the lens array and the low-refractive index adhesive layer is 1.35-1.65. The refractive index of the low-refractive-index adhesive layer is smaller than that of the lens array, the range of materials which can be selected for the low-refractive-index adhesive layer after the materials of the lens array are determined is smaller, the difference delta n between the refractive indexes of the lens array and the low-refractive-index adhesive layer is less than or equal to 0.3, and the adjustable range of delta n is smaller.

In the manufacturing process of the naked eye 3D display device, the curvature radius and the camber of the hemispherical lens array are determined through the following formula (1) and the formula (2).

R＝Δn×f (1)

Wherein Deltan is the difference between the refractive indexes of the lens array and the low refractive index glue layer, f is the focal length of the lens array, and R is the curvature radius of the lens array; d is the viewing distance of the naked eye 3D display device, and h is the camber of the lens array. From the above formula, the radius of curvature R and the camber h of the lens array can be adjusted by adjusting Δn.

According to the formula (1) and the formula (2), the smaller adjustable range of delta n can cause the smaller adjustable range of the curvature radius R and the camber h of the hemispherical lens array, which has high requirements on the manufacturing process of the lens array, greatly increases the manufacturing difficulty of the naked eye display device and reduces the production efficiency.

To solve the above problems, an embodiment of the present invention provides a display panel, as shown in fig. 1, including: a pixel layer 7, a planarization layer 2, a lens array (not labeled in fig. 1), and a cover plate 5, which are sequentially stacked; the flat layer 2 is positioned on the light emitting side of the pixel layer 7, and the distance between the flat layer 2 and the cover plate 5 is larger than the maximum thickness of the lens array along the direction perpendicular to the flat layer 2; the display panel further comprises a hollow structure (not labeled in fig. 1) between the lens array and the cover plate 2, the hollow structure being filled with a gas.

The type of the display panel is not limited here. The display panel may be any one of an OLED (Organic LIGHT EMTTING Diode) display panel, a Micro LED Micro display panel, and a Mini LED Micro display panel; the OLED display panel may be a WOLED (white organic light emitting diode) display panel, where pixels of the WOLED display panel emit white light, and a color filter layer is required to be additionally disposed to realize color display; or the OLED display panel can also be an RGB OLED (red, green and blue organic light emitting diode) display panel, and pixels of the RGB OLED display panel can directly emit light with different colors without arranging a color filter layer. Or the display panel may be an LCD (Liquid CRYSTAL DISPLAY) display panel.

If the display panel is an RGB OLED display panel, the pixel layer may include a color light emitting layer; as shown in fig. 1 or 2, the pixel layer 7 may include the red light emitting layer 71, the green light emitting layer 72, and the blue light emitting layer 73 at the same time, and of course, the pixel layer 7 may include only a color light emitting layer of one color. And can be specifically determined according to actual requirements.

If the display panel is a WOLED display panel or an LCD display panel, the pixel layer may include a color filter layer. As shown in fig. 1 or 2, the pixel layer 7 may include the red filter layer 71, the green filter layer 72, and the blue filter layer 73 at the same time, and of course, the pixel layer 7 may include a color filter layer of only one color. And can be specifically determined according to actual requirements. Further, in the case where the display panel is a WOLED display panel, the display panel may further include a light emitting layer disposed at a side of the pixel layer away from the flat layer and capable of emitting white light. In the case that the display panel is an LCD display panel, the display panel may further include a liquid crystal layer, an array substrate, and a backlight module, where light emitted from the backlight module sequentially passes through the array substrate and the liquid crystal layer, and is directed to the pixel layer.

Specific materials for the above-mentioned flat layer are not limited here. For example, the above-mentioned flat layer may be made of an organic light-transmitting material, and specifically, the organic light-transmitting material may be any one of polystyrene, polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, acryl and acrylic; or the flat layer can be made of inorganic light-transmitting material, and the inorganic light-transmitting material can be optical glass.

Specific materials of the lens array are not limited herein. For example, the lens array may be made of an inorganic light-transmitting material, such as quartz glass; alternatively, the lens array may be made of an organic light-transmitting material, such as acrylic. In practical applications, in order to facilitate matching the requirements of different parameters related to the lens array in the display product, the lens array is generally manufactured by a nanoimprint or photolithographic thermal reflow method, and an organic light-transmitting material with a refractive index in the range of 1.35-1.65 is adopted. The above related parameters refer to the size parameters of the lens array, and if the lens array is a hemispherical lens array, the size parameters may be camber, caliber, etc., where the camber range may be 2-100um, the caliber range may be 2-1000um, and the specific size may be determined according to practical situations.

As shown with reference to fig. 1, the lens array includes a plurality of lens structures 9, and the specific shape of the lens structures is not limited herein. For example, the shape of the cross section of the lens structure along the direction parallel to the flat layer may be circular, elliptical, square, rectangular. And can be specifically determined according to actual requirements. The specific dimensional parameters of the lens structure are not limited herein. By way of example, the lens structures may be micro-lens structures, which may be of the order of microns in size.

It should be noted that, the thickness of the flat layer along the direction perpendicular to the cover plate is equal to the focal length of the lens structure, so that the light emitting surface of the pixel layer is located at the focal plane of the lens array. In practical applications, the light-emitting surface of the pixel layer may be located near the focal plane of the lens array due to manufacturing process errors.

Specific materials of the cover plate are not limited herein. For example, the cover plate can be made of organic light-transmitting materials; or the cover plate can be made of inorganic light-transmitting materials.

The type of gas filled in the hollow structure is not limited here. The gas may be, for example, a reactive gas, or an inert gas. Specifically, the active gas may be carbon dioxide, oxygen, hydrogen or air; the inert gas may be nitrogen or argon. In practical applications, in order to avoid the reaction of the gas with other film layers and damage to the display panel, the hollow structure is usually filled with an inert gas. The refractive index of the gas is usually 1.0.

The hollow structure filled with the gas can protect the lens array, can realize the dimming function by matching with the lens array, does not influence the light emitting effect of the lens, and provides possibility for preparing the high-performance lens array.

The display panel may further include a frame sealing adhesive 4 as shown in fig. 1, and of course, may also include other structures such as a driving circuit, and only the structures related to the invention are described herein, and the other structures included in the display panel may be obtained according to related technologies or common general knowledge, which are not described herein again.

The embodiment of the invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a pixel layer, a flat layer, a lens array and a cover plate which are sequentially stacked; the flat layer is positioned on the light emitting side of the pixel layer, and the distance between the flat layer and the cover plate is larger than the maximum thickness of the lens array along the direction perpendicular to the flat layer; the display panel further includes a hollow structure between the lens array and the cover plate, the hollow structure being filled with a gas.

The hollow structure of the display panel is filled with gas, and the refractive index of the gas is far smaller than that of the low refractive index glue material layer in the related art, so that the range of a difference delta n between the refractive index of the lens array and the refractive index of the gas is enlarged; after the refractive index of the gas is determined, the selectable range of the refractive index of the lens array can be 1.35-1.65, the selectable range of the refractive index of the lens array is enlarged, the range of the difference delta n between the refractive index of the lens array and the refractive index of the gas can be 0.35-0.65, the adjusting range of delta n is enlarged, the adjusting range of the technological parameters of the lens array is widened, and therefore the manufacturing difficulty of the lens array is reduced, the production cost is further reduced, and meanwhile, the production efficiency is improved.

Optionally, referring to fig. 1, the display panel further includes a support layer (not labeled) located between the flat layer 2 and the cover plate 5 and for supporting the cover plate 5.

Specific materials of the support layer are not limited herein. In practical applications, in order to improve the transmittance of the display panel, the supporting layer may be made of a light-transmitting material.

Alternatively, referring to fig. 6, the support layer includes a plurality of support parts 6, and the plurality of support parts 6 are disposed around the lens array.

The specific number of the above-mentioned supporting portions is not limited here. In practical applications, the specific number of support portions may be determined according to the size of the display panel.

The cross-sectional shape of the support portion in the direction parallel to the flat layer is not limited here. By way of example, the cross-sectional shape of the support along a direction parallel to the planar layer may be circular, square or other shape. The diameter of the circle may be 3-20um, or the side length of the square may be 3-20um. By way of example, the diameter of the circle or the side length of the square may be 3um, 6um, 15um or 20um. The specific size is determined according to the actual situation.

Alternatively, referring to fig. 1 or 2, the support layer includes a plurality of support parts 6, and the lens array includes a plurality of lens structures 9; the support 6 is located between a plurality of lens structures 9.

The shape of the cross section of the lens structure along the direction parallel to the flat layer is not limited here. The shape of the cross section of the lens structure along the direction parallel to the flat layer can be round, oval, square or rectangle. And can be specifically determined according to actual requirements.

The specific dimensional parameters of the lens structure are not limited herein. By way of example, the lens structures may be micro-lens structures, which may be of the order of microns in size.

The thickness range of the supporting portion along the direction perpendicular to the flat layer may be 5-20um, specifically, may be 5um, 10um, 15um or 20um, and the specific thickness is determined according to practical situations.

It should be noted that the supporting portion may be divided into a first supporting portion and a second supporting portion, where the first supporting portion is used for supporting the cover plate, and the thickness of the first supporting portion along the direction perpendicular to the flat layer is the same as the distance between the flat layer and the cover plate; the second supporting portion is used for buffering pressure from the outside to protect the lens array, and the thickness of the second supporting portion along the direction perpendicular to the flat layer is smaller than that of the first supporting portion.

Alternatively, as shown with reference to fig. 2, there is a gap between two adjacent lens structures 9; the support 6 is located in the gap. For large-size display panels, the supporting portions are arranged in the gaps, and the supporting portions have better supporting effects on the cover plates in the display panels, so that the middle positions of the cover plates are prevented from being bent due to insufficient supporting. The lens array having a gap between two adjacent lens structures may be referred to as a non-contact lens array.

Further alternatively, as shown with reference to fig. 2, there is a gap (not shown in fig. 2) between two adjacent lens structures 9; the support 6 is located in the gap; the flat layer includes a first flat layer 21 and a second flat layer 22 which are stacked, and a light absorbing layer 23 between the first flat layer 21 and the second flat layer 22, the first flat layer 21 being in close proximity to the pixel layer 7; the front projection of the light-absorbing layer 23 onto the cover plate 5 and the front projection of the lens structure 9 onto the cover plate 5 do not overlap or partially overlap each other.

The orthographic projection of the light-absorbing layer on the cover plate means that: projection of the light-absorbing layer onto the cover plate in a direction perpendicular to the cover plate. The orthographic projection of the lens structure on the cover plate means that: projection of the lens structure onto the cover plate in a direction perpendicular to the cover plate.

The meaning that the orthographic projection of the light absorbing layer on the cover plate and the orthographic projection of the lens structure on the cover plate are not overlapped is that: there is no overlapping area between the front projection of the light absorbing layer on the cover plate and the front projection of the lens structure on the cover plate.

The overlapping of the front projection of the light absorbing layer on the cover plate and the front projection of the lens structure on the cover plate means that: the front projection of the light absorbing layer on the cover plate and the front projection of the lens structure on the cover plate have overlapping areas, but do not completely overlap.

The thicknesses of the first flat layer, the light absorbing layer and the second flat layer along the direction vertical to the cover plate are equal to or about equal to the focal length of the mirror structure, so that the light emergent surface of the pixel layer is positioned on the focal plane of the lens array. In practical applications, the light-emitting surface of the pixel layer may be located near the focal plane of the lens array due to manufacturing process errors. The second planarization layer covers the light-absorbing layer, and the second planarization layer may play a role in planarization.

It should be noted that, referring to fig. 2, if the display panel is a WOLED display panel or an LCD display panel, since a gap is formed between two adjacent lens structures 9, when light is emitted from the pixel layer to the display panel through the gap, the light absorbing layer 23 is provided to absorb crosstalk light, so as to improve the crosstalk problem caused by light with different colors, and further improve the display effect. If the display panel is an OLED display panel, the light absorbing layer functions similarly to the above, and will not be described here again.

Alternatively, referring to fig. 1, two adjacent lens structures 9 are connected to each other, and the orthographic projection of the support portion 6 on the cover plate 5 overlaps with the orthographic projection of the lens structure 9 on the cover plate 5.

Further alternatively, referring to fig. 5, the support 6 is shaped as a cone, the apex of which is located between two adjoining lens structures 9.

The lens array in which two adjacent lens structures are connected to each other may be referred to as a contact lens array. In the close-contact lens array, the supporting part is set to be a cone, and the vertex of the cone is arranged between two connected lens structures, so that the probability of shielding light by the supporting part can be reduced, the light utilization rate is improved, and the display effect is improved.

Alternatively, referring to fig. 3 or 4, the cover 5 includes a cover body 51 and a supporting portion 52 connected to each other, the supporting portion 52 being disposed around a circumference of the cover body 51; the cover body 51 covers the lens array, and the supporting portion 52 is used for supporting the cover body 51 to form a hollow structure.

The cover plate body and the supporting portion can be integrally arranged, and specifically, the cover plate body and the supporting portion can be integrally formed by thinning treatment at the middle position of the cover plate to form a groove shape. In practical applications, the thickness of the thinned cover plate along the direction perpendicular to the flat layer may range from 5 um to 50um. The thickness of the cover plate body and the supporting part is determined according to practical conditions.

It should be noted that, as shown in fig. 3 or fig. 4, since the cover 5 includes the cover body 51 and the supporting portion 52 connected to each other in different setting directions, for convenience of description and distinction, the cover body 51 and the supporting portion 52 are divided by a dotted line, which does not represent that the cover body 51 and the supporting portion 52 are disconnected from each other.

Optionally, referring to fig. 5, the display panel further includes a light emitting layer 1, and the pixel layer 7 is located on the light emitting side of the light emitting layer 1.

If the display panel is a WOLED display panel, the light emitting layer may be a white light emitting layer, and the pixel layer may include a color filter layer. As shown in fig. 5, the pixel layer 7 may include the red filter layer 71, the green filter layer 72, and the blue filter layer 73 at the same time, and of course, the pixel layer 7 may include only a color filter layer of one color. And can be specifically determined according to actual requirements.

The display device may be a display device such as an RGB OLED display, a WOLED display, or an LCD display, and any product or component having a display function such as a television, a digital camera, a cellular phone, a tablet computer, or the like including the display device.

The specific structure of the display panel may refer to the content of the foregoing embodiment, and will not be described herein.

The display device provided by the embodiment of the invention has the advantages of low manufacturing process difficulty and good display effect.

S1, forming a pixel layer, a flat layer, a Lens array (Lens) and a cover plate which are stacked.

Wherein, a hollow structure is formed between the lens array and the cover plate; the hollow structure is filled with gas; the distance between the flat layer and the cover plate is greater than the maximum thickness of the lens array in a direction perpendicular to the flat layer.

If the display panel is an OLED display panel, the pixel layer may include a color light emitting layer; as shown in fig. 1 or 2, the pixel layer 7 may include color light emitting layers of three colors of the red light emitting layer 71, the green light emitting layer 72, and the blue light emitting layer 73 at the same time, and of course, the pixel layer 7 may include only one color light emitting layer. And can be specifically determined according to actual requirements.

The gas filled in the hollow structure is not limited herein. The gas may be, for example, a reactive gas, or an inert gas. Specifically, the active gas may be carbon dioxide, oxygen, hydrogen or air, and the inert gas may be nitrogen or argon. In practical applications, in order to avoid the reaction of the gas with other film layers and damage to the display panel, the hollow structure is usually filled with an inert gas.

The manufacturing method is simple, in the display panel manufactured by the method, the adjustable range of the difference delta n between the refractive index of the lens array and the refractive index of the gas is large, and the process parameter adjustment range of the lens array is widened, so that the manufacturing difficulty of the lens array is reduced, the production cost is further reduced, and meanwhile, the production efficiency is improved. The display panel has good display effect.

The following describes five manufacturing methods of display panels with different structures, taking the display panel as a WOLED display panel as an example. As shown in fig. 1 to 5, the WOLED display panel includes a light emitting layer 1 and a pixel layer 7, the light emitting layer 1 is disposed on a side of the pixel layer 7 away from the support layer and is capable of emitting white light, and the pixel layer 7 includes a red filter layer 71, a green filter layer 72 and a blue filter layer 73. First, a method of manufacturing the display panel shown in fig. 1 will be described by taking the structure of the display panel as an example.

S01, forming a light emitting layer and forming a pixel layer 7 as shown in fig. 11 on the light emitting layer 1.

S02, the planarization layer 2 is formed on the pixel layer 7.

S03, forming the lens structures 9 connected to each other as shown in fig. 12 on the flat layer 2 to obtain a lens array.

S04, a plurality of support portions 6 as shown in fig. 13 are formed on the lens array to obtain a support layer.

The supporting layer can be made by photolithography, and the supporting part is also called a supporting column (PS, panelspacer).

S05, forming a cover plate 5 shown in fig. 1 on the supporting layer.

S06, forming a frame sealing adhesive 4 shown in fig. 1, and packaging the display panel through the frame sealing adhesive 4 to form a middle empty structure.

Referring to fig. 1, two adjacent lens structures 9 are connected to each other, and the orthographic projection of the support portion 6 on the cover plate 5 overlaps with the orthographic projection of the lens structure 9 on the cover plate 5. The lens array in which two adjacent lens structures are connected to each other may be referred to as a contact lens array.

Second, a method of manufacturing the display panel will be described by taking the structure of the display panel shown in fig. 2 as an example.

S11, forming a light emitting layer and forming a pixel layer 7 as shown in fig. 11 on the light emitting layer 1.

S12, a first flat layer 21 and a light absorbing layer 23 shown in fig. 7 are sequentially formed on the pixel layer 7.

S13, a second planarization layer 22 as shown in fig. 8 is formed on the light absorbing layer 23.

S14, forming a lens structure 9 as shown in fig. 9 on the second planarization layer 22 to obtain a lens array. Wherein, a gap is arranged between two adjacent lens structures.

S15, a plurality of support portions 6 as shown in fig. 10 are formed on the lens array to obtain a support layer. Wherein the support portion is located in the gap.

S16, forming a cover plate 5 shown in fig. 2 on the supporting layer.

S17, forming the frame sealing glue 4 shown in FIG. 2, and packaging the display panel through the frame sealing glue to form a hollow structure.

A gap (not shown in fig. 2) is provided between the two adjacent lens structures 9; the support 6 is located in the gap; the flat layer includes a first flat layer 21 and a second flat layer 22 which are stacked, and a light absorbing layer 23 between the first flat layer 21 and the second flat layer 22, the first flat layer 21 being in close proximity to the pixel layer 7; the front projection of the light-absorbing layer 23 onto the cover plate 5 and the front projection of the lens structure 9 onto the cover plate 5 do not overlap or partially overlap each other.

The thicknesses of the first flat layer, the light absorption layer and the second flat layer along the direction vertical to the cover plate are equal to the focal length of the lens structure, so that the light emergent surface of the pixel layer is positioned on the focal plane of the lens array. In practical applications, the light-emitting surface of the pixel layer may be located near the focal plane of the lens array due to manufacturing process errors. The second planarization layer covers the light-absorbing layer, and the second planarization layer may play a role in planarization.

It should be noted that, as shown in fig. 2, since a gap is formed between two adjacent lens structures 9, when light exits the display panel from the pixel layer through the gap, crosstalk light can be absorbed by providing the light absorbing layer 23, so that the crosstalk problem caused by light with different colors is improved, and the display effect is further improved. If the display panel is an OLED display panel, the light absorbing layer functions similarly to the above, and will not be described here again.

Thirdly, a method of manufacturing the display panel will be described taking the structure of the display panel shown in fig. 3 as an example.

S21, sequentially forming a light-emitting layer, a pixel layer, a first flat layer, a light-absorbing layer, a second flat layer and a lens array according to the manufacturing method of the second display panel.

S22, a cover plate 5 shown in fig. 3 is formed on the lens array.

Wherein, referring to fig. 3, the cover 5 includes a cover body 51 and a supporting portion 52 connected, and the supporting portion 52 is disposed around a circumference of the cover body 51; the cover body 51 covers the lens array, and the supporting portion 52 is used for supporting the cover body 51 to form a hollow structure.

Fourth, a method of manufacturing the display panel will be described by taking the structure of the display panel shown in fig. 4 as an example.

S31, sequentially forming a light-emitting layer, a pixel layer, a flat layer and a lens array according to the manufacturing method of the first display panel.

S32, a cover plate 5 shown in fig. 4 is formed on the lens array.

Referring to fig. 4, the cover 5 includes a cover body 51 and a supporting portion 52 connected to each other, the supporting portion 52 being provided around a circumference of the cover body 51; the cover body 51 covers the lens array, and the supporting portion 52 is used for supporting the cover body 51 to form a hollow structure.

Fifth, a method of manufacturing the display panel will be described by taking the structure of the display panel shown in fig. 5 as an example.

S41, sequentially forming a light-emitting layer, a pixel layer, a flat layer and a lens array according to the manufacturing method of the first display panel.

S42, a plurality of support portions 6 as shown in fig. 5 are formed on the lens array to obtain a support layer.

S43, a cover plate 5 as shown in fig. 5 is formed on the support layer.

S44, forming the frame sealing glue 4 shown in FIG. 5, and packaging the display panel to form a middle empty structure.

Or the structure of the display panel shown in fig. 5 may be manufactured by the following method:

s51, sequentially forming a light-emitting layer, a pixel layer, a flat layer and a lens array according to the manufacturing method of the first display panel.

S52, the cover plate 5 shown in fig. 14 is formed.

S53, a plurality of support portions 6 as shown in fig. 14 are formed on the cover plate 5 to obtain a support layer.

S54, the cover plate provided with the supporting layer as shown in fig. 14 is placed on the lens array as shown in fig. 12 through the alignment function of the device. The supporting part is a cone, and the vertex of the cone is arranged between the two connected lens structures.

S55, forming the frame sealing adhesive 4 shown in FIG. 5, and packaging the display panel to form a middle empty structure.

The supporting portion may be configured as a cone as shown in fig. 5, and the vertex of the cone is disposed between two connected lens structures, so that the probability that the supporting portion shields light can be reduced, thereby improving the light utilization rate and improving the display effect.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The display panel is characterized by comprising a pixel layer, a flat layer, a lens array and a cover plate which are sequentially stacked; the flat layer is positioned on the light emergent side of the pixel layer, and the distance between the flat layer and the cover plate is larger than the maximum thickness of the lens array along the direction perpendicular to the flat layer;

the display panel further includes a hollow structure between the lens array and the cover plate, the hollow structure being filled with a gas;

the lens array includes a plurality of lens structures;

The flat layer comprises a first flat layer and a second flat layer which are stacked, and a light absorption layer positioned between the first flat layer and the second flat layer, wherein the first flat layer is adjacent to the pixel layer; the front projection of the light absorbing layer on the cover plate and the front projection of the lens structure on the cover plate are not overlapped or partially overlapped.

2. The display panel of claim 1, further comprising a support layer between the flat layer and the cover plate for supporting the cover plate.

3. The display panel of claim 2, wherein the support layer comprises a plurality of support portions disposed around the lens array.

4. The display panel of claim 2, wherein the support layer comprises a plurality of supports and the lens array comprises a plurality of lens structures; the support is located between a plurality of the lens structures.

5. The display panel of claim 4, wherein there is a gap between two adjacent lens structures; the support is located in the gap.

6. The display panel according to claim 4, wherein adjacent two of the lens structures are connected to each other, and an orthographic projection of the support portion on the cover plate overlaps an orthographic projection of the lens structure on the cover plate.

7. The display panel of claim 6, wherein the support is in the shape of a cone, and wherein the apex of the cone is located between two adjoining lens structures.

8. The display panel of claim 1, wherein the cover plate comprises a cover plate body and a supporting portion connected, the supporting portion being disposed around a circumference of the cover plate body;

9. The display panel according to any one of claims 1-8, further comprising a light emitting layer, wherein the pixel layer is located on a light emitting side of the light emitting layer.

10. A display device comprising the display panel of any one of claims 1-9.