WO2023029092A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2023029092A1
WO2023029092A1 PCT/CN2021/118394 CN2021118394W WO2023029092A1 WO 2023029092 A1 WO2023029092 A1 WO 2023029092A1 CN 2021118394 W CN2021118394 W CN 2021118394W WO 2023029092 A1 WO2023029092 A1 WO 2023029092A1
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WO
WIPO (PCT)
Prior art keywords
display panel
light
corner
emitting pixel
sides
Prior art date
Application number
PCT/CN2021/118394
Other languages
English (en)
French (fr)
Inventor
王浩然
Original Assignee
武汉华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US17/599,588 priority Critical patent/US20240032399A1/en
Priority to KR1020227002659A priority patent/KR102663377B1/ko
Priority to JP2022502948A priority patent/JP7385732B2/ja
Publication of WO2023029092A1 publication Critical patent/WO2023029092A1/zh

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment

Definitions

  • the present application relates to the field of display technology, in particular to a display panel and a display device.
  • a micro-lens structure is used for light extraction.
  • the microlens structure includes a plurality of microlenses, which are usually prepared by using a mask with a photolithographic pattern to form a microlens.
  • the ultraviolet light diffracted into the mask will be more superimposed at the included angle of the photolithographic pattern, resulting in The etched taper angle will be greatly reduced and extended inward, affecting the light converging effect of the microlens structure.
  • Embodiments of the present application provide a display panel and a display device to solve the problem that when the microlens layer of the existing display panel is used, the etched taper angle is greatly reduced and extends inward, which affects the light converging effect of the microlens structure. technical problem.
  • the application provides a display panel, including:
  • a plurality of light-emitting pixel units are arranged on the array substrate;
  • a microlens layer disposed on the side of the light-emitting pixel unit away from the array substrate, the microlens layer includes a plurality of microlenses and a plurality of openings, and the openings are formed between two adjacent microlenses , the opening is set corresponding to the light-emitting pixel unit;
  • a passivation layer covering the microlens layer, the passivation layer having a refractive index greater than that of the microlens layer;
  • the plurality of openings include a plurality of first openings, and along the plane direction of the display panel, the first openings include a main body portion and at least one flared portion, the main body portion includes a plurality of sides, A corner is formed at the intersecting position of two adjacent sides, and the flared portion is arranged at the corner, and the flared portion is an arc-shaped convex surface.
  • the plurality of sides include a plurality of first sides and a plurality of second sides, and the first side and two adjacent second sides respectively form a first corner and a second side. Two corners, the flared portion is arranged at the first corner and the second corner.
  • the flared portion surrounds the first corner and the second corner.
  • the expansion part is located between the extension lines of two adjacent first sides, and the circle where the expansion part is located is respectively adjacent to the two adjacent first sides.
  • the circle in which it is located is circumscribed.
  • the expansion part at least includes a first sub-expansion part and a second sub-expansion part connected together, the first sub-expansion part surrounds the first corner, and the second sub-expansion part surrounds the first corner.
  • a sub-flare surrounds the second corner.
  • the ratio of the area of the flared portion to the area of the main body is less than or equal to 0.2.
  • the included angle between the side surface of the microlens and the plane where the array substrate is located is in a range of 50 degrees to 90 degrees.
  • the application provides a display panel, including:
  • a plurality of light-emitting pixel units are arranged on the array substrate;
  • a microlens layer disposed on the side of the light-emitting pixel unit away from the array substrate, the microlens layer includes a plurality of microlenses and a plurality of openings, and the openings are formed between two adjacent microlenses , the opening is set corresponding to the light-emitting pixel unit;
  • the refractive index of the passivation layer is greater than the refractive index of the microlens layer
  • the plurality of openings include a plurality of first openings, and along the plane direction of the display panel, the first openings include a main body portion and at least one flared portion, the main body portion includes a plurality of sides, A corner is formed at the intersecting position of two adjacent sides, and the flared portion is arranged at the corner, and the flared portion is an arc-shaped convex surface.
  • the plurality of sides include a plurality of first sides and a plurality of second sides, and the first side and two adjacent second sides respectively form a first corner and a second side. Two corners, the flared portion is arranged at the first corner and the second corner.
  • the flared portion surrounds the first corner and the second corner.
  • the expansion part is located between the extension lines of two adjacent first sides, and the circle where the expansion part is located is respectively adjacent to the two adjacent first sides.
  • the circle in which it is located is circumscribed.
  • the expansion part at least includes a first sub-expansion part and a second sub-expansion part connected together, the first sub-expansion part surrounds the first corner, and the second sub-expansion part surrounds the first corner.
  • a sub-flare surrounds the second corner.
  • the ratio of the area of the flared portion to the area of the main body is less than or equal to 0.2.
  • the included angle between the side surface of the microlens and the plane where the array substrate is located is in a range of 50 degrees to 90 degrees.
  • the included angle between the side surface of the microlens and the plane where the array substrate is located is a first included angle;
  • the included angle between the side surface of the microlens and the plane where the array substrate is located is a second included angle;
  • the difference range between the first included angle and the second included angle is less than 20 degrees.
  • the first included angle is equal to the second included angle.
  • the multiple sides include four first sides and four second sides, and the four first sides and four second sides are alternately connected to form a closed figure, so The first side is an arc concave to the inside of the closed figure.
  • the planar shape of the main body part is the same as the planar shape of the corresponding light-emitting pixel unit.
  • the opening further includes a second opening, and the planar shape of the second opening is oval or circular;
  • the plurality of light-emitting pixel units at least include a red light-emitting pixel unit, a green light-emitting pixel unit and the blue light-emitting pixel unit, the first opening corresponds to the red light-emitting pixel unit and the green light-emitting pixel unit, and the second opening corresponds to the blue light-emitting pixel unit.
  • the present application provides a display device, including the above-mentioned display panel.
  • the display panel and the display device provided by the present application includes a microlens layer and a passivation layer
  • the microlens layer includes a plurality of microlenses and a plurality of openings
  • the plurality of openings include a plurality of first openings
  • the first opening includes a main body
  • the present application fine-tunes the shape of the first opening on the basis of the pattern of the main body by setting an outward expansion at the corner, on the one hand, making the first opening close to the light-emitting pixel unit in shape, Avoid reducing the light-gathering effect of the microlens due to the large difference between the first opening and the light-emitting pixel unit in shape; on the other hand, forming the flared portion at the corner of the main body increases the distance between adjacent sides In this way, the superposition intensity of the diffracted light diffused into the mask plate at the corner can be reduced, thereby increasing the taper angle of the microlens, which
  • FIG. 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present application
  • FIG. 2A is a schematic diagram of a first planar structure of a first opening of the display panel in FIG. 1;
  • FIG. 2B is a schematic diagram of a second planar structure of the first opening of the display panel in FIG. 1;
  • FIG. 2C is a schematic diagram of a third planar structure of the first opening of the display panel in FIG. 1;
  • Fig. 3 A is a sectional view along A-A in Fig. 2A;
  • Fig. 3B is a sectional view along B-B in Fig. 2A;
  • FIG. 4A is a schematic plan view of a microlens layer of a display panel provided by an embodiment of the present application.
  • Fig. 4B is a schematic diagram of the arrangement of light-emitting pixel units provided by the embodiment of the present application.
  • Fig. 5 is a schematic diagram of the corresponding structure of the first mask and the display panel provided by the embodiment of the present application;
  • FIG. 6 is a schematic diagram of the corresponding structure of the second mask plate and the display panel provided by the embodiment of the present application.
  • FIG. 7 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application.
  • FIG. 8A to FIG. 8G are schematic flow charts of a method for manufacturing a display panel provided in an embodiment of the present application.
  • Display panel 11. Array substrate; 12. Light-emitting pixel unit; 121. Red light-emitting pixel unit; 122. Green light-emitting pixel unit; 123. Blue light-emitting pixel unit; 13. Packaging layer; 14. Microlens layer; 141 , microlens; 142, first opening; 143, second opening; 15, passivation layer; 16, photoresist layer;
  • FIG. 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention.
  • An embodiment of the present invention provides a display panel 1 , which includes an array substrate 11 , a plurality of light-emitting pixel units 12 , a microlens layer 14 and a passivation layer 15 .
  • the array substrate 11 includes a substrate, a plurality of thin film transistors and a plurality of signal wires disposed on the substrate, and the thin film transistors are used to drive the corresponding light emitting pixel units 12 to emit light.
  • a plurality of the light-emitting pixel units 12 are arranged on the array substrate 11, the microlens layer 14 is arranged on the side of the light-emitting pixel units 12 away from the array substrate 11, and the microlens layer 14 includes a plurality of A microlens 141 and a plurality of openings, one opening is formed between two adjacent microlenses 141 , and the opening is arranged corresponding to the light emitting pixel unit 12 .
  • the passivation layer 15 covers the microlens layer 14 .
  • the display panel 1 in the embodiment of the present invention uses the difference in refractive index between the microlens layer 14 and the passivation layer 15 to make the light emitted by the light-emitting pixel unit 12 in the microlens Total reflection occurs at the junction of the lens 141 and the passivation layer 15 , so that light rays converge.
  • the refractive index of the passivation layer 15 is greater than that of the microlens layer 14 , for example, the refractive index of the microlens layer 14 is 1.5, and the refractive index of the passivation layer 15 is 1.65.
  • the planar shape of the opening is the same as the planar shape of the light-emitting pixel unit 12 and the size is the same or close to that, the light emitted by the light-emitting pixel unit 12 is at the junction of the microlens 141 and the passivation layer 15 Convergence occurs best.
  • the pattern shape of the light-emitting pixel unit 12 has corners, correspondingly, the pattern shape of the mask used to form the opening also has corners, and the corners are formed by the intersection of two adjacent sides. Since the ultraviolet light used in the exposure process will be diffracted at the two adjacent sides forming the corner, the ultraviolet light will bend and spread around the two adjacent side edges to different degrees, because the adjacent two sides The relative distance between the sides of the strips at the corners is relatively short, and the ultraviolet light diffracted from two adjacent sides into the mask plate is superimposed at the corners, resulting in greater intensity of diffracted light, resulting in etched The taper angle ⁇ of the microlens 141 is low and extends inward, which affects the light converging effect of the microlens 141 .
  • FIG. 2A is a schematic diagram of the first planar structure of the first opening of the display panel in FIG. 1;
  • FIG. 2B is a schematic diagram of the first opening of the display panel in FIG. A schematic diagram of the second plane structure;
  • FIG. 2C is a schematic diagram of the third plane structure of the first opening of the display panel in FIG. 1 .
  • the plurality of openings include a plurality of first openings 142.
  • the first openings 142 include a main body portion 211 and at least one flared portion 212.
  • the plane of the main body portion 211 The shape is the same as the planar shape of the corresponding light-emitting pixel unit 12.
  • the main body 211 includes a plurality of sides 2111, and a corner 2112 is formed at the intersection of two adjacent sides 2111.
  • the flared portion 212 Located at the corner 2112, the flared portion 212 is an arc-shaped convex surface.
  • the shape of the first opening 142 is close to the luminous pixel unit 12, to avoid reducing the light converging effect of the microlens 141 due to the large difference in shape between the first opening 142 and the luminous pixel unit 12;
  • the distance between the two adjacent sides 2111 is increased, so that the superposition of the ultraviolet light diffracted by the adjacent two sides 2111 into the mask plate 2 at the corner 2112 can be reduced.
  • the total amount thereby reducing the superimposed intensity of the diffracted light diffused into the mask plate 2 at the corner 2112, increasing the taper angle ⁇ of the microlens 141, which is conducive to improving the light converging effect of the microlens 141 , thereby improving the luminous efficiency of the display panel 1 .
  • the plurality of sides 2111 includes a plurality of first sides 2111a and a plurality of second sides 2111b, and the first side 2111a forms a first corner 2112a and a plurality of adjacent two second sides 2111b respectively.
  • the second corner 2112b, the expanded portion 212 is disposed at the first corner 2112a and the second corner 2112b.
  • the flared portion 212 surrounds the first corner 2112a and the second corner 2112b, because the size of the second side 2111b is compared with the size of the first side 2111a is relatively short, and the distance between the first corner 2112a and the second corner 2112b is relatively short. Therefore, in this embodiment, only one As for the expanded portion 212, the circle where the expanded portion 212 is located intersects the circles where the two adjacent second sides 2111b are located.
  • the “enclosed” in this embodiment means that the ray extending from the apex of the first corner 2112a to any direction away from the main body portion 211 passes through the flared portion 212 , and the ray formed by extending in any direction away from the main body portion 211 with the vertex of the second corner 2112b as an end point also passes through the flared portion 212 .
  • FIG. 2B please refer to FIG. 2B .
  • the difference between FIG. 2B and FIG. 2A is that the expanded portion 212 is located between two adjacent extension lines of the first side 2111a, and the outer The circle where the expanded portion 212 is located circumscribes the circle where the two adjacent first sides 2111a are located.
  • the area of the expanded portion 212 in FIG. 2A is smaller than the area of the expanded portion 212 in FIG. 2B , which is beneficial to reduce the difference between the formed first opening 142 and the corresponding light-emitting pixel unit 12, thereby The light converging effect of the microlens 141 is further improved.
  • the expansion part 212 includes a connected first sub-expansion part 212a and a second sub-extension part 212b.
  • the first sub-flare 212a surrounds the first corner 2112a
  • the second sub-flare 212b surrounds the second corner 2112b.
  • two sub-expanded parts respectively surrounding the first corner 2112a and the second corner 2112b are provided, and the circle where the first sub-expanded part 212a is located
  • “enclosed” in this embodiment means that a ray extending from the apex of the first corner 2112a in any direction away from the main body 211 passes through the first sub-outer.
  • a ray formed by extending in any direction away from the main body part 211 with the apex of the second corner 2112b as an end point passes through the second sub-expanding part 212b.
  • the sum of the areas of the first sub-expansion portion 212a and the second sub-expansion portion 212b in FIG. 2C is smaller than the area of the expansion portion in FIG. 2A
  • the area of 212 is beneficial to reduce the difference between the formed first opening 142 and the corresponding light-emitting pixel unit 12 , thereby further improving the light converging effect of the microlens 141 .
  • the ratio of the area of the flared portion 212 to the area of the main body portion 211 is less than or equal to 0.2.
  • the included angle between the side surface of the microlens 141 and the plane where the array substrate 11 is located is in a range of 50 degrees to 90 degrees.
  • FIG. 3A is a sectional view along A-A in FIG. 2A
  • FIG. 3B is a sectional view along B-B in FIG. 2A
  • the included angle between the side surface of the microlens 141 and the plane where the array substrate 11 is located is the first Included angle ⁇ 1
  • the angle between the side surface of the microlens 141 and the plane where the array substrate 11 is located is the second included angle ⁇ 2.
  • the difference range between the first included angle ⁇ 1 and the second included angle ⁇ 2 is less than 20 degrees, by adding the design of the flared portion 212 on the basis of the main body portion 211, the microscopic angle ⁇ 2 can be improved.
  • the condition that the lens 141 extends inward makes the second included angle ⁇ 2 decrease and approach the first included angle ⁇ 1, which is beneficial to improve the light converging effect of the microlens 141, thereby improving the performance of the display panel. 1 luminous efficiency.
  • the first included angle ⁇ 1 is equal to the second included angle ⁇ 2, and the present invention can improve the design of the expanded part 212 on the basis of the main body part 211, which can improve the light caused by the diffraction of light.
  • the inward extension of the microlens 141 is beneficial to further improve the light converging effect of the microlens 141 , thereby improving the luminous efficiency of the display panel 1 .
  • the shape of the main body part 211 is pearl (pearl) shape
  • the shape of the main body part 211 can also be other shapes, the present invention is not concerned about this. Do limited.
  • the embodiment of the present invention takes the pearl shape as an example for illustration and description.
  • the multiple sides 2111 include four first sides 2111a and four second sides 2111b, the first sides 2111a and the second sides 2111b are alternately connected to form a closed figure, and the first sides One side 2111a is an arc concave toward the inside of the closed figure, and the second side 2111b is a straight line.
  • Figure 4A is a schematic plan view of the micro-lens layer of a display panel provided by an embodiment of the present invention
  • Figure 4B is a schematic diagram of the arrangement of light-emitting pixel units provided by an embodiment of the present invention
  • Each of the light-emitting pixel units 12 includes at least a plurality of red light-emitting pixel units 121, a plurality of green light-emitting pixel units 122, and a plurality of blue light-emitting pixel units 123
  • the first opening 142 corresponds to the red light-emitting pixel units 121 and the plurality of blue light-emitting pixel units 123.
  • the blue light-emitting pixel unit 123 is described.
  • the planar shape of the main body part 211 is the same as that of the corresponding light-emitting pixel unit 12.
  • the planes of the red light-emitting pixel unit 121 and the blue light-emitting pixel unit 123 are The shape is pearl-shaped, and the planar shape of the green light-emitting pixel unit 122 may be an ellipse. Of course, the planar shape of the green light-emitting pixel unit 122 may also be other curved shapes.
  • the light-emitting area of the red light-emitting pixel unit 121 is larger than the light-emitting area of the green light-emitting pixel unit 122, therefore, in the direction along the plane of the display panel 1, corresponding to the red light-emitting pixel unit 121
  • the area of the first opening 142 is greater than the area of the first opening 142 corresponding to the green light-emitting pixel unit 122 .
  • the display panel 1 also includes a plurality of second openings 143, the second openings 143 are arranged corresponding to the green light-emitting pixel units 122, and the pattern shape of the second openings 143 is the same as that of the green light-emitting pixel units. 122 patterns have the same shape. Since the light emitting area of the green light emitting pixel unit 122 is smaller than the light emitting area of the red light emitting pixel unit 121 and the blue light emitting pixel unit 123, in the plane direction along the display panel 1, the second The area of the opening 143 is smaller than that of the first opening 142 .
  • the second opening 143 in the embodiment of the present invention is arc-shaped, there is no corner 2112 of the main body 211 in the first opening 142, therefore, the second opening 143 does not need to set the outer expansion part 212.
  • the display panel 1 further includes an encapsulation layer 13 disposed between the light-emitting pixel unit 12 and the microlens layer 14, and the encapsulation layer 13 covers the light-emitting pixel unit 12 and the array substrate 11 , the microlens layer 14 is disposed on a side of the encapsulation layer 13 away from the array substrate 11 .
  • the display panel 1 may also include unshown parts such as touch electrodes, buffer layers and color filter layers.
  • Figure 5 is a schematic diagram of the corresponding structure of the first mask and the display panel provided by the embodiment of the present invention
  • Figure 6 is a schematic diagram of the second mask and the display panel provided by the embodiment of the present invention
  • the embodiment of the present invention also provides a mask plate for forming the opening, the mask plate includes a first functional area 21 and a second functional area 22, the first functional area 21 corresponds to the The first opening 142, the second functional area corresponds to the second opening 143, the planar shape of the first functional area 21 is the same as the planar shape of the first opening 142, and the planar shape of the second functional area 22 The planar shape is the same as that of the second opening.
  • the first functional area 21 and the second functional area 22 are light-shielding areas for light-shielding, except for the first functional area 21 on the mask plate 2
  • the area other than the second functional area 22 is a hollow area 23 for light transmission.
  • the photoresist used in the yellow light process for forming the microlens 141 is a negative photoresist, so that the ultraviolet light used in the exposure process passes through all but the first functional area 21 and the second functional area 22.
  • the photoresist corresponding to the hollowed-out area 23 remains, and the photoresist corresponding to the first functional area 21 and the second functional area 22 is removed; afterward, after an etching process, Part of the microlens layer 14 corresponding to the hollowed-out area 23 remains, and the microlens layer 14 corresponding to the first functional area 21 and the second functional area 22 is completely removed.
  • Parts of the microlens layer 14 near the edges corresponding to the first functional area 21 and the second functional area 22 are removed, thereby forming a taper angle ⁇ .
  • the first functional area 21 and the second functional area 22 are hollow areas for light transmission, and the mask plate 2 except the first functional area 21 and the area other than the second functional area 22 is a light-shielding area 24 for light-shielding.
  • the photoresist used in the yellow light process for forming the microlens 141 is a positive photoresist, so that the ultraviolet light used in the exposure process passes through all but the first functional area 21 and the second functional area 22.
  • the photoresist corresponding to the shading area 24 is removed, while the photoresist corresponding to the first functional area 21 and the second functional area 22 remains;
  • the microlens layer 14 in the shading area 24 is completely removed, and the microlens layer 14 corresponding to the first functional area 21 and the second functional area 22 remains, and at the same time due to the diffraction effect of light, corresponding to the A portion of the microlens layer 14 near the edge of the light-shielding region 24 remains, thereby forming a taper angle ⁇ .
  • FIG. 7 is a flowchart of a method for manufacturing a display panel provided by an embodiment of the present invention
  • FIGS. 8A-8G are schematic flowcharts of a method for manufacturing a display panel provided by an embodiment of the present invention.
  • the embodiment of the present invention also provides a method for manufacturing the display panel 1, comprising the following steps:
  • a substrate is provided, and a plurality of thin film transistors and a plurality of signal traces are formed on the substrate, and the thin film transistors include gates, gates, Film layers such as gate insulating layer, active layer and source-drain metal layer. Since this is prior art, it will not be described in detail here.
  • a plurality of the light-emitting pixel units 12 include a red light-emitting pixel unit 121, a green light-emitting pixel unit 122, and a blue light-emitting pixel unit 123, and each of the light-emitting pixel units 12 includes an anode, a pixel definition layer, an electron injection layer, an electron transport layer, an organic light emitting layer, a hole injection layer and a hole transport layer, and the organic light emitting layer can be formed by inkjet printing.
  • the method further includes: forming an encapsulation layer 13 covering the array substrate 11 and the light-emitting pixel unit 12 .
  • the encapsulation layer 13 may be encapsulated by a thin film to prevent water vapor from intruding into the organic light-emitting layer of the light-emitting pixel unit 12 and causing the light-emitting pixel unit 12 to fail.
  • the encapsulation layer 13 can adopt single-layer encapsulation or multi-layer encapsulation. Specifically, when the encapsulation layer 13 adopts multi-layer encapsulation, such as three-layer encapsulation, the encapsulation layer 13 includes the first inorganic encapsulation layer formed sequentially. , an organic encapsulation layer and a second inorganic encapsulation layer.
  • the microlens layer 14 includes a plurality of microlenses 141 and a plurality of openings, the openings are formed on two adjacent Between the microlenses 141 , the openings are arranged corresponding to the light emitting pixel units 12 .
  • a microlens layer 14 is formed on the entire surface of the encapsulation layer 13, and a photoresist layer 16 is formed on the entire surface of the microlens layer 14; please refer to FIG. 8E, and then use the The mask plate 2 exposes the photoresist layer 16, so that the photoresist layer 16 corresponding to the light-emitting pixel unit 12 is exposed; referring to FIG. 8D.
  • the photoresist layer 16 is peeled off.
  • etchant is used to etch the microlens layer 14, so that the microlens layer 14 corresponding to the light-emitting pixel unit 12 is etched away, thereby forming a plurality of microlenses 141, adjacent to each other.
  • the openings are formed between the microlenses 141 , and the plurality of openings include a plurality of first openings 142 and a plurality of second openings 143 .
  • the passivation layer 15 can be formed by deposition, sputtering or evaporation process, the passivation layer 15 is an inorganic material, and the refractive index of the passivation layer 15 is larger than that of the micro
  • the refractive index of the lens layer 14 is such that the light emitted by the light-emitting pixel unit 12 converges at the boundary between the microlens 141 and the passivation layer 15, which is conducive to improving the light extraction efficiency of the display panel 1 .
  • the preparation method before forming the microlens layer 14 on the encapsulation layer 13, the preparation method further includes the following steps: forming a touch layer (not shown in the figure) on the encapsulation layer 13 .
  • the touch layer may adopt a DOT (Direct On Cell Touch, directly manufacturing the touch layer on the encapsulation layer 13 ) structure
  • the display panel 1 is a touch display panel.
  • the shape of the opening is the same as that of the corresponding light-emitting pixel unit 12, which is beneficial to improve the light converging effect of the microlens 141, Furthermore, the luminous efficiency of the display panel 1 is improved.
  • the present invention also provides a display device, which includes the display panel in the above-mentioned embodiments, and the display device can be any device with a display, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. functional product or component.
  • a display such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. functional product or component.
  • the display device further includes a touch panel, and the touch panel is combined with the display panel in a built-in or plug-in manner, so that the display device has a touch function.
  • the display panel and the display device provided by the present invention
  • the display panel includes a microlens layer and a passivation layer
  • the microlens layer includes a plurality of microlenses and a plurality of openings
  • the plurality of openings include a plurality of first openings
  • the first The opening includes a main body.
  • the shape of the first opening is fine-tuned on the basis of the pattern of the main body by setting the flared part at the corner.
  • the shape of the first opening is close to the light-emitting pixel unit to avoid
  • the difference between the shape of an opening and the light-emitting pixel unit is too large to reduce the light converging effect of the microlens;
  • the superposition intensity of the diffracted light diffused into the mask plate at the corner is reduced, thereby increasing the taper angle of the microlens, which is beneficial to improving the light converging effect of the microlens, thereby improving the luminous efficiency of the display panel.

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Abstract

一种显示面板(1)及显示装置，显示面板(1)包括阵列基板(11)、多个发光像素单元(12)、微透镜层(14)和钝化层(15)，微透镜层(14)包括多个微透镜(141)和多个开口，多个开口包括多个第一开口(142)，在沿显示面板(1)的平面方向上，第一开口(142)包括主体部(211)和至少一个外扩部(212)，外扩部(212)设于主体部(211)的拐角(2112)处，外扩部(212)为弧形凸面，有利于提升微透镜(141)的光汇聚效果。

Description

显示面板及显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板及显示装置。
 背景技术
对于有机发光二极管（Organic Light-Emitting Diode，OLED）显示面板而言，为了提高发光器件的发光效率、降低功耗和延长寿命，采用微透镜结构进行出光提取。微透镜结构包括多个微透镜，通常利用具有光刻图案的掩膜板制备形成微透镜，然而，向掩膜板内衍射的紫外光在光刻图案的夹角处叠加起来会更强，导致刻蚀出的锥(taper)角会大幅降低并向内延伸，影响微透镜结构的光汇聚效果。
 技术问题
本申请实施例提供一种显示面板及显示装置，以解决采用现有的显示面板的微透镜层时，导致刻蚀出的taper角大幅降低并向内延伸，影响微透镜结构的光汇聚效果的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种显示面板，包括：
阵列基板；
多个发光像素单元，设于所述阵列基板上；
微透镜层，设于所述发光像素单元远离所述阵列基板的一侧，所述微透镜层包括多个微透镜和多个开口，所述开口形成于相邻两个所述微透镜之间，所述开口与所述发光像素单元对应设置；
钝化层，覆盖所述微透镜层，所述钝化层的折射率大于所述微透镜层的折射率；以及
封装层，覆盖所述发光像素单元和所述阵列基板；
其中，多个所述开口包括多个第一开口，在沿所述显示面板的平面方向上，所述第一开口包括主体部和至少一个外扩部，所述主体部包括多条侧边，相邻两条所述侧边的相交位置处形成拐角，所述外扩部设于所述拐角处，所述外扩部为弧形凸面。
根据本申请提供的显示面板，多条所述侧边包括多条第一边和多条第二边，所述第一边与相邻的两条所述第二边分别形成第一拐角和第二拐角，所述外扩部设于所述第一拐角和所述第二拐角处。
根据本申请提供的显示面板，所述外扩部包围所述第一拐角和所述第二拐角。
根据本申请提供的显示面板，所述外扩部位于相邻的两条所述第一边的延伸线之间，所述外扩部所在的圆分别与相邻的两条所述第一边所在的圆外切。
根据本申请提供的显示面板，所述外扩部至少包括相连的第一子外扩部和第二子外扩部，所述第一子外扩部包围所述第一拐角，所述第二子外扩部包围所述第二拐角。
根据本申请提供的显示面板，所述外扩部的面积与所述主体部的面积的比值小于或等于0.2。
根据本申请提供的显示面板，所述微透镜的侧面与所述阵列基板所在平面之间的夹角范围为50度~90度。
本申请提供一种显示面板，包括：
阵列基板；
多个发光像素单元，设于所述阵列基板上；
微透镜层，设于所述发光像素单元远离所述阵列基板的一侧，所述微透镜层包括多个微透镜和多个开口，所述开口形成于相邻两个所述微透镜之间，所述开口与所述发光像素单元对应设置；以及
钝化层，覆盖所述微透镜层，所述钝化层的折射率大于所述微透镜层的折射率；
其中，多个所述开口包括多个第一开口，在沿所述显示面板的平面方向上，所述第一开口包括主体部和至少一个外扩部，所述主体部包括多条侧边，相邻两条所述侧边的相交位置处形成拐角，所述外扩部设于所述拐角处，所述外扩部为弧形凸面。
根据本申请提供的显示面板，多条所述侧边包括多条第一边和多条第二边，所述第一边与相邻的两条所述第二边分别形成第一拐角和第二拐角，所述外扩部设于所述第一拐角和所述第二拐角处。
根据本申请提供的显示面板，所述外扩部包围所述第一拐角和所述第二拐角。
根据本申请提供的显示面板，所述外扩部位于相邻的两条所述第一边的延伸线之间，所述外扩部所在的圆分别与相邻的两条所述第一边所在的圆外切。
根据本申请提供的显示面板，所述外扩部至少包括相连的第一子外扩部和第二子外扩部，所述第一子外扩部包围所述第一拐角，所述第二子外扩部包围所述第二拐角。
根据本申请提供的显示面板，所述外扩部的面积与所述主体部的面积的比值小于或等于0.2。
根据本申请提供的显示面板，所述微透镜的侧面与所述阵列基板所在平面之间的夹角范围为50度~90度。
根据本申请提供的显示面板，在垂直于相对的两条所述第一边的截面上，所述微透镜的侧面与所述阵列基板所在平面之间的夹角为第一夹角；在垂直于相对的两个所述外扩部的截面上，所述微透镜的侧面与所述阵列基板所在平面之间的夹角为第二夹角；
其中，所述第一夹角和所述第二夹角的差值范围小于20度。
根据本申请提供的显示面板，所述第一夹角和所述第二夹角相等。
根据本申请提供的显示面板，多条所述侧边包括四条所述第一边和四条所述第二边，四条所述第一边和四条所述第二边交替相连围成封闭图形，所述第一边为向所述封闭图形的内部凹陷的弧线。
根据本申请提供的显示面板，所述主体部的平面形状与对应的所述发光像素单元的平面形状相同。
根据本申请提供的显示面板，所述开口还包括第二开口，所述第二开口的平面形状为椭圆形或圆形；多个所述发光像素单元至少包括红色发光像素单元、绿色发光像素单元和蓝色发光像素单元，所述第一开口对应所述红色发光像素单元和所述绿色发光像素单元，所述第二开口对应所述蓝色发光像素单元。
本申请提供一种显示装置，包括上述显示面板。
 有益效果
本申请的有益效果为：本申请提供的显示面板及显示装置，显示面板包括微透镜层和钝化层，微透镜层包括多个微透镜和多个开口，多个开口包括多个第一开口，第一开口包括主体部，本申请通过在拐角处设置外扩部以在主体部的图案基础上对第一开口的形状进行微调，一方面，使得第一开口在形状上接近发光像素单元，避免因为第一开口在形状上与发光像素单元的差异过大而降低微透镜的光汇聚效果；另一方面，在主体部的拐角处形成外扩部增大了相邻侧边之间的距离，如此能够减小在拐角处向掩膜板内扩散的衍射光的叠加强度，从而提高微透镜的taper角，有利于提升微透镜的光汇聚效果，进而提升了显示面板的发光效率。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种显示面板的截面结构示意图；
图2A是图1中的显示面板的第一开口的第一种平面结构示意图；
图2B是图1中的显示面板的第一开口的第二种平面结构示意图；
图2C是图1中的显示面板的第一开口的第三种平面结构示意图；
图3A是沿图2A中的A-A的剖面图；
图3B是沿图2A中的B-B的剖面图；
图4A是本申请实施例提供的一种显示面板微透镜层的平面结构示意图；
图4B是本申请实施例提供的发光像素单元的排布示意图；
图5是本申请实施例提供的第一种掩膜板和显示面板的对应结构示意图；
图6是本申请实施例提供的第二种掩膜板和显示面板的对应结构示意图；
图7是本申请实施例提供的显示面板的制备方法的流程图；
图8A~图8G是本申请实施例提供的显示面板的制备方法的流程示意图。
附图标记说明：
1、显示面板；11、阵列基板；12、发光像素单元；121、红色发光像素单元；122、绿色发光像素单元；123、蓝色发光像素单元；13、封装层；14、微透镜层；141、微透镜；142、第一开口；143、第二开口；15、钝化层；16、光刻胶层；
2、掩膜板；21、第一功能区；22、第二功能区；23、镂空区域；24、遮光区域；211、主体部；2111、侧边；2111a、第一边；2111b、第二边；2112、拐角；2112a、第一拐角；2112b、第二拐角；212、外扩部；212a、第一子外扩部；212b、第二子外扩部。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下”通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
请参阅图1，图1是本发明实施例提供的一种显示面板的截面结构示意图。本发明实施例提供了一种显示面板1，所述显示面板1包括阵列基板11、多个发光像素单元12、微透镜层14和钝化层15。
所述阵列基板11包括衬底和设于所述衬底上的多个薄膜晶体管和多条信号走线，所述薄膜晶体管用于驱动对应的所述发光像素单元12发光。多个所述发光像素单元12设于所述阵列基板11上，所述微透镜层14设于所述发光像素单元12远离所述阵列基板11的一侧，所述微透镜层14包括多个微透镜141和多个开口，相邻两个所述微透镜141之间形成一个所述开口，所述开口与所述发光像素单元12对应设置。所述钝化层15覆盖所述微透镜层14。
可以理解的是，本发明实施例中的所述显示面板1通过所述微透镜层14和所述钝化层15的折射率差异，来使得所述发光像素单元12发出的光线在所述微透镜141和所述钝化层15的交界处发生全反射，从而使得光线发生汇聚。具体地，所述钝化层15的折射率大于所述微透镜层14的折射率，例如，所述微透镜层14的折射率为1.5，所述钝化层15的折射率为1.65。当所述开口的平面形状和所述发光像素单元12的平面形状相同且大小一致或接近时，所述发光像素单元12发出的光线在所述微透镜141和所述钝化层15的交界处发生汇聚的效果最好。
由于所述发光像素单元12的图案形状的存在拐角，对应的，用于形成所述开口的所述掩膜板的图案形状同样存在拐角，所述拐角由相邻两条侧边相交而成。由于用于曝光工艺的紫外光在形成所述拐角的相邻两条侧边处均会发生衍射作用，紫外光绕过相邻两条侧边边缘发生不同程度的弯散传播，因为相邻两条侧边在所述拐角处的相对距离较近，相邻两条侧边向掩膜板内衍射的紫外光在所述拐角处进行叠加，导致衍射光强度更大，从而导致刻蚀出的所述微透镜141的taper角θ较低并向内延伸，影响所述微透镜141的光线汇聚效果。
有鉴于此，请结合图1和图2A~图2C，图2A是图1中的显示面板的第一开口的第一种平面结构示意图；图2B是图1中的显示面板的第一开口的第二种平面结构示意图；图2C是图1中的显示面板的第一开口的第三种平面结构示意图。
多个所述开口包括多个第一开口142，在沿所述显示面板1的平面方向上，所述第一开口142包括主体部211和至少一个外扩部212，所述主体部211的平面形状与对应的所述发光像素单元12的平面形状相同，所述主体部211包括多条侧边2111，相邻两条所述侧边2111的相交位置处形成拐角2112，所述外扩部212设于所述拐角2112处，所述外扩部212为弧形凸面。
可以理解的是，本发明通过在所述拐角2112处设置所述外扩部212以在所述主体部211的图案基础上进行微调，一方面，所述第一开口142在形状上接近所述发光像素单元12，避免因为所述第一开口142在形状上与所述发光像素单元12的差异过大而降低所述微透镜141的光汇聚效果；另一方面，所述外扩部212增大了相邻两条所述侧边2111之间的距离，如此能够减小相邻两条所述侧边2111向所述掩膜板2内衍射的紫外光在所述拐角2112处叠加的光线总量，从而减小了在所述拐角2112处向所述掩膜板2内扩散的衍射光叠加强度，提高了微透镜141的taper角θ，有利于提升所述微透镜141的光汇聚效果，进而提升了所述显示面板1的发光效率。
具体地，多条所述侧边2111包括多条第一边2111a和多条第二边2111b，所述第一边2111a与相邻的两条所述第二边2111b分别形成第一拐角2112a和第二拐角2112b，所述外扩部212设于所述第一拐角2112a和所述第二拐角2112b处。
在一种实施例中，请参阅图2A，所述外扩部212包围所述第一拐角2112a和所述第二拐角2112b，由于所述第二边2111b的尺寸相较于所述第一边2111a较短，所述第一拐角2112a和所述第二拐角2112b之间的距离较短，因此，本实施例通过仅设置一个同时包围所述第一拐角2112a和所述第二拐角2112b的所述外扩部212，所述外扩部212所在的圆分别与相邻的两条所述第二边2111b所在的圆相交。
需要说明的是，本实施例中的“包围”的意思是指，以所述第一拐角2112a的顶点作为端点向远离所述主体部211的任意方向延伸形成的射线经过所述外扩部212，且以所述第二拐角2112b的顶点作为端点向远离所述主体部211的任意方向延伸形成的射线也经过所述外扩部212。
在一种实施例中，请参阅图2B，图2B与图2A的不同之处在于，所述外扩部212位于相邻的两条所述第一边2111a的延伸线之间，所述外扩部212所在的圆分别与相邻的两条所述第一边2111a所在的圆外切。图2A中的所述外扩部212的面积小于图2B中的所述外扩部212的面积，有利于降低形成的所述第一开口142与对应的所述发光像素单元12的差异，从而进一步提升了所述微透镜141的光汇聚效果。
在一种实施例中，请参阅图2C，图2C与图2A的不同之处在于，所述外扩部212包括相连的第一子外扩部212a和第二子外扩部212b，所述第一子外扩部212a包围所述第一拐角2112a，所述第二子外扩部212b包围所述第二拐角2112b。本实施例通过设置两个分别包围所述第一拐角2112a和所述第二拐角2112b的子外扩部，所述第一子外扩部212a所在的圆与相邻的两条所述第一边2111a中的其中一条所述第一边2111a所在的圆相交，所述第二子外扩部212b所在的圆与相邻的两条所述第一边2111a中的另一条所述第一边2111a所在的圆相交。
需要说明的是，本实施例中的“包围”的意思是指，以所述第一拐角2112a的顶点作为端点向远离所述主体部211的任意方向延伸形成的射线经过所述第一子外扩部212a，以所述第二拐角2112b的顶点作为端点向远离所述主体部211的任意方向延伸形成的射线经过所述第二子外扩部212b。在沿所述掩膜板2的平面方向上，图2C中的所述第一子外扩部212a和所述第二子外扩部212b的面积之和小于图2A中的所述外扩部212的面积，有利于降低形成的所述第一开口142与对应的所述发光像素单元12的差异，从而进一步提升了所述微透镜141的光汇聚效果。
具体地，为了避免所述第一开口142与对应的所述发光像素单元12相差太大，影响所述微透镜141的光汇聚效果。在本发明实施例中，所述外扩部212的面积与所述主体部211的面积的比值小于或等于0.2。
具体地，在垂直于所述显示面板1的平面方向上，所述微透镜141的侧面与所述阵列基板11所在平面的夹角范围为50度~90度。
进一步地，请参阅图3A和图3B，图3A是沿图2A中的A-A的剖面图；图3B是沿图2A中的B-B的剖面图。在垂直于相对的两条所述第一边2111a的截面上（沿图2A中的A-A剖面线），所述微透镜141的侧面与所述阵列基板11所在平面之间的夹角为第一夹角θ1；在垂直于相对的两个所述外扩部212的截面上（沿图2A中的B-B剖面线），所述微透镜141的侧面与所述阵列基板11所在平面之间的夹角为第二夹角θ2。
其中，所述第一夹角θ1和所述第二夹角θ2的差值范围小于20度，通过在所述主体部211的基础上增设所述外扩部212的设计，能够改善所述微透镜141向内延伸的情况，使得所述第二夹角θ2减小并趋近于所述第一夹角θ1，有利于提升所述微透镜141的光汇聚效果，进而提升了所述显示面板1的发光效率。
进一步地，所述第一夹角θ1等于所述第二夹角θ2，本发明通过在所述主体部211的基础上增设所述外扩部212的设计，能够改善因光的衍射所引起的所述微透镜141向内延伸的情况，有利于进一步提升所述微透镜141的光汇聚效果，进而提升了所述显示面板1的发光效率。
可选地，在本发明实施例中，所述主体部211的形状为珍珠（pearl）形，当然地，在其它实施例中，所述主体部211还可为其它形状，本发明对此不做限定。
需要说明的是，为了清楚地阐述说明本发明的技术方案，本发明实施例以所述主体部211的形状为pearl形为例进行阐述说明。
具体地，多条所述侧边2111包括四条所述第一边2111a和四条所述第二边2111b，所述第一边2111a与所述第二边2111b交替相连围成封闭图形，所述第一边2111a为向所述封闭图形的内部凹陷的弧线，所述第二边2111b为直线。
请结合图1、图4A和图4B，图4A是本发明实施例提供的一种显示面板微透镜层的平面结构示意图；图4B是本发明实施例提供的发光像素单元的排布示意图；多个所述发光像素单元12至少包括多个红色发光像素单元121、多个绿色发光像素单元122和多个蓝色发光像素单元123，所述第一开口142对应所述红色发光像素单元121和所述蓝色发光像素单元123。
所述主体部211的平面形状与对应的所述发光像素单元12的平面形状相同，对应地，在本发明实施例中，所述红色发光像素单元121和所述蓝色发光像素单元123的平面形状为pearl形，所述绿色发光像素单元122的平面形状可以为椭圆形，当然地，所述绿色发光像素单元122的平面形状还可以为其它曲面形状。
具体地，所述红色发光像素单元121的发光面积大于所述绿色发光像素单元122的发光面积，因此，在沿所述显示面板1的平面方向上，对应所述红色发光像素单元121的所述第一开口142的面积大于对应所述绿色发光像素单元122的所述第一开口142的面积。
进一步地，所述显示面板1还包括多个第二开口143，所述第二开口143与所述绿色发光像素单元122对应设置，所述第二开口143的图案形状与所述绿色发光像素单元122的图案形状相同。由于所述绿色发光像素单元122的发光面积小于所述红色发光像素单元121和所述蓝色发光像素单元123的发光面积，因此，在沿所述显示面板1的平面方向上，所述第二开口143的面积小于所述第一开口142的面积。
可以理解的是，由于本发明实施例中的所述第二开口143的形状为弧形，不存在如所述第一开口142中主体部211的所述拐角2112，因此，所述第二开口143无需设置所述外扩部212。
进一步地，请继续参阅图1，所述显示面板1还包括设置于所述发光像素单元12和所述微透镜层14之间的封装层13，所述封装层13覆盖所述发光像素单元12和所述阵列基板11，所述微透镜层14设于所述封装层13远离所述阵列基板11的一侧。
进一步地，所述显示面板1还可以包括触控电极、缓冲层和彩膜层等未示出部分。
请参阅图5和图6，图5是本发明实施例提供的第一种掩膜板和显示面板的对应结构示意图；图6是本发明实施例提供的第二种掩膜板和显示面板的对应结构示意图；本发明实施例还提供一种掩膜板，用于形成所述开口，所述掩膜板包括第一功能区21和第二功能区22，所述第一功能区21对应所述第一开口142，所述第二功能区对应所述第二开口143，所述第一功能区21的平面形状与所述第一开口142的平面形状相同，所述第二功能区22的平面形状与所述第二开口的平面形状相同。
在一种实施例中，请参阅图5，所述第一功能区21和所述第二功能区22为遮光区域，用于遮光，所述掩膜板2上除所述第一功能区21和所述第二功能区22以外的区域为镂空区域23，用于透光。形成所述微透镜141的黄光制程中所采用的光刻胶为负性光刻胶，使得用于曝光工艺的紫外光经过除所述第一功能区21和所述第二功能区22的以外的所述镂空区域23，对应所述镂空区域23的光刻胶保留，而对应所述第一功能区21和所述第二功能区22的光刻胶被去除；之后经过刻蚀工艺，对应所述镂空区域23的所述微透镜层14部分保留，对应所述第一功能区21和所述第二功能区22的所述微透镜层14被完全去除，同时由于光的衍射作用，对应所述第一功能区21和所述第二功能区22的边缘附近的所述微透镜层14部分去除，从而形成taper角θ。
在一种实施例中，请参阅图6，所述第一功能区21和所述第二功能区22为镂空区域，用于透光，所述掩膜板2上除所述第一功能区21和所述第二功能区22以外的区域为遮光区域24，用于遮光。形成所述微透镜141的黄光制程中所采用的光刻胶为正性光刻胶，使得用于曝光工艺的紫外光经过除所述第一功能区21和所述第二功能区22的以外的遮光区域24，对应所述遮光区域24的光刻胶被去除，而对应所述第一功能区21和所述第二功能区22的光刻胶保留；之后经过刻蚀工艺，对应所述遮光区域24的所述微透镜层14被完全去除，对应所述第一功能区21和所述第二功能区22的所述微透镜层14保留，同时由于光的衍射作用，对应所述遮光区域24边缘附近的所述微透镜层14部分保留，从而形成taper角θ。
请参阅图7、图8A~图8G，图7是本发明实施例提供的显示面板的制备方法的流程图，图8A~图8G是本发明实施例提供的显示面板的制备方法的流程示意图。本发明实施例还提供一种显示面板1的制备方法，包括以下步骤：
S10：提供一阵列基板11。
具体地，请参阅图8A，首先，提供一衬底，在所述衬底上形成多个薄膜晶体管和多条信号走线，所述薄膜晶体管包括依次形成于所述衬底上的栅极、栅极绝缘层、有源层和源漏极金属层等膜层。由于此为现有技术，故在此不再详述。
S20：在所述阵列基板11上形成多个发光像素单元12。
具体地，请参阅图8B，多个所述发光像素单元12包括红色发光像素单元121、绿色发光像素单元122和蓝色发光像素单元123，每一所述发光像素单元12均包括阳极、像素定义层、电子注入层、电子传输层、有机发光层、空穴注入层和空穴传输层，所述有机发光层可通过喷墨打印的方式形成。
进一步地，所述步骤S20之后还包括：形成覆盖所述阵列基板11和所述发光像素单元12的封装层13。
具体地，请参阅图8C，所述封装层13可采用薄膜封装，用于防止水汽侵入所述发光像素单元12的有机发光层中而引起所述发光像素单元12失效。所述封装层13可采用单层封装或多层封装，具体的，当所述封装层13采用多层封装时，例如三层封装时，所述封装层13包括依次形成的第一无机封装层、有机封装层和第二无机封装层。
S30：在所述发光像素单元12远离所述阵列基板11的一侧形成微透镜层14，所述微透镜层14包括多个微透镜141和多个开口，所述开口形成于相邻两个所述微透镜141之间，所述开口与所述发光像素单元12对应设置。
具体地，请参阅图8D，首先，在所述封装层13上整面形成微透镜层14，在所述微透镜层14上整面形成光刻胶层16；请参阅图8E，之后利用所述掩膜板2对所述光刻胶层16进行曝光，使得对应所述发光像素单元12的所述光刻胶层16被曝光掉；请参阅图8F，剥离所述光刻胶层16，最后采用刻蚀液对所述微透镜层14进行刻蚀处理，使得对应所述发光像素单元12的所述微透镜层14被刻蚀掉，从而形成多个所述微透镜141，相邻两个所述微透镜141之间形成所述开口，多个所述开口包括多个第一开口142和多个第二开口143。
S40：形成覆盖所述封装层13和所述微透镜层14的钝化层15。
具体地，请参阅图8G，可通过沉积、溅射或蒸镀的工艺形成所述钝化层15，所述钝化层15为无机材料，所述钝化层15的折射率大于所述微透镜层14的折射率，以使所述发光像素单元12发出的光线在所述微透镜141和所述钝化层15之间的边界处发生汇聚，有利于提升所述显示面板1的出光效率。
在一种实施例中，在所述封装层13上形成所述微透镜层14之前，所述制备方法还包括以下步骤：在所述封装层13上形成触控层（图中未示出）。具体的，所述触控层可以采用DOT（Direct On Cell Touch，直接将触控层制作于封装层13上）结构，所述显示面板1为触控显示面板。
可以理解的是，利用上述掩膜板2形成的所述显示面板1，所述开口的形状与对应的所述发光像素单元12的形状相同，有利于提升所述微透镜141的光汇聚效果，进而提升了所述显示面板1的发光效率。
本发明还提供一种显示装置，所述显示装置包括上述实施例中的显示面板，所述显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
所述显示装置还包括触控面板，所述触控面板以内置式或外挂式的方式与所述显示面板结合，以使所述显示装置具有触控功能。
有益效果为：本发明提供的显示面板及显示装置，显示面板包括微透镜层和钝化层，微透镜层包括多个微透镜和多个开口，多个开口包括多个第一开口，第一开口包括主体部，本发明通过在拐角处设置外扩部以在主体部的图案基础上对第一开口的形状进行微调，一方面，使得第一开口在形状上接近发光像素单元，避免因为第一开口在形状上与发光像素单元的差异过大而降低微透镜的光汇聚效果；另一方面，在主体部的拐角处形成外扩部增大了相邻侧边之间的距离，如此能够减小在拐角处向掩膜板内扩散的衍射光的叠加强度，从而提高微透镜的taper角，有利于提升微透镜的光汇聚效果，进而提升了显示面板的发光效率。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示面板，包括：
    阵列基板；
    多个发光像素单元，设于所述阵列基板上；
    微透镜层，设于所述发光像素单元远离所述阵列基板的一侧，所述微透镜层包括多个微透镜和多个开口，所述开口形成于相邻两个所述微透镜之间，所述开口与所述发光像素单元对应设置；
    钝化层，覆盖所述微透镜层，所述钝化层的折射率大于所述微透镜层的折射率；以及
    封装层，覆盖所述发光像素单元和所述阵列基板；
    其中，多个所述开口包括多个第一开口，在沿所述显示面板的平面方向上，所述第一开口包括主体部和至少一个外扩部，所述主体部包括多条侧边，相邻两条所述侧边的相交位置处形成拐角，所述外扩部设于所述拐角处，所述外扩部为弧形凸面。
  2. 根据权利要求1所述的显示面板，其中，多条所述侧边包括多条第一边和多条第二边，所述第一边与相邻的两条所述第二边分别形成第一拐角和第二拐角，所述外扩部设于所述第一拐角和所述第二拐角处。
  3. 根据权利要求2所述的显示面板，其中，所述外扩部包围所述第一拐角和所述第二拐角。
  4. 根据权利要求2所述的显示面板，其中，所述外扩部位于相邻的两条所述第一边的延伸线之间，所述外扩部所在的圆分别与相邻的两条所述第一边所在的圆外切。
  5. 根据权利要求2所述的显示面板，其中，所述外扩部至少包括相连的第一子外扩部和第二子外扩部，所述第一子外扩部包围所述第一拐角，所述第二子外扩部包围所述第二拐角。
  6. 根据权利要求1所述的显示面板，其中，所述外扩部的面积与所述主体部的面积的比值小于或等于0.2。
  7. 根据权利要求2所述的显示面板，其中，所述微透镜的侧面与所述阵列基板所在平面之间的夹角范围为50度~90度。
  8. 一种显示面板，包括：
    阵列基板；
    多个发光像素单元，设于所述阵列基板上；
    微透镜层，设于所述发光像素单元远离所述阵列基板的一侧，所述微透镜层包括多个微透镜和多个开口，所述开口形成于相邻两个所述微透镜之间，所述开口与所述发光像素单元对应设置；以及
    钝化层，覆盖所述微透镜层，所述钝化层的折射率大于所述微透镜层的折射率；
    其中，多个所述开口包括多个第一开口，在沿所述显示面板的平面方向上，所述第一开口包括主体部和至少一个外扩部，所述主体部包括多条侧边，相邻两条所述侧边的相交位置处形成拐角，所述外扩部设于所述拐角处，所述外扩部为弧形凸面。
  9. 根据权利要求8所述的显示面板，其中，多条所述侧边包括多条第一边和多条第二边，所述第一边与相邻的两条所述第二边分别形成第一拐角和第二拐角，所述外扩部设于所述第一拐角和所述第二拐角处。
  10. 根据权利要求9所述的显示面板，其中，所述外扩部包围所述第一拐角和所述第二拐角。
  11. 根据权利要求9所述的显示面板，其中，所述外扩部位于相邻的两条所述第一边的延伸线之间，所述外扩部所在的圆分别与相邻的两条所述第一边所在的圆外切。
  12. 根据权利要求9所述的显示面板，其中，所述外扩部至少包括相连的第一子外扩部和第二子外扩部，所述第一子外扩部包围所述第一拐角，所述第二子外扩部包围所述第二拐角。
  13. 根据权利要求8所述的显示面板，其中，所述外扩部的面积与所述主体部的面积的比值小于或等于0.2。
  14. 根据权利要求9所述的显示面板，其中，所述微透镜的侧面与所述阵列基板所在平面之间的夹角范围为50度~90度。
  15. 根据权利要求14所述的显示面板，其中，在垂直于相对的两条所述第一边的截面上，所述微透镜的侧面与所述阵列基板所在平面之间的夹角为第一夹角；在垂直于相对的两个所述外扩部的截面上，所述微透镜的侧面与所述阵列基板所在平面之间的夹角为第二夹角；
    其中，所述第一夹角和所述第二夹角的差值范围小于20度。
  16. 根据权利要求15所述的显示面板，其中，所述第一夹角和所述第二夹角相等。
  17. 根据权利要求9所述的显示面板，其中，多条所述侧边包括四条所述第一边和四条所述第二边，四条所述第一边和四条所述第二边交替相连围成封闭图形，所述第一边为向所述封闭图形的内部凹陷的弧线。
  18. 根据权利要求17所述的显示面板，其中，所述主体部的平面形状与对应的所述发光像素单元的平面形状相同。
  19. 根据权利要求8所述的显示面板，其中，所述开口还包括第二开口，所述第二开口的平面形状为椭圆形或圆形；多个所述发光像素单元至少包括红色发光像素单元、绿色发光像素单元和蓝色发光像素单元，所述第一开口对应所述红色发光像素单元和所述绿色发光像素单元，所述第二开口对应所述蓝色发光像素单元。
  20. 一种显示装置，其中，包括显示面板，所述显示面板包括：
    阵列基板；
    多个发光像素单元，设于所述阵列基板上；
    微透镜层，设于所述发光像素单元远离所述阵列基板的一侧，所述微透镜层包括多个微透镜和多个开口，所述开口形成于相邻两个所述微透镜之间，所述开口与所述发光像素单元对应设置；以及
    钝化层，覆盖所述微透镜层，所述钝化层的折射率大于所述微透镜层的折射率；
    其中，多个所述开口包括多个第一开口，在沿所述显示面板的平面方向上，所述第一开口包括主体部和至少一个外扩部，所述主体部包括多条侧边，相邻两条所述侧边的相交位置处形成拐角，所述外扩部设于所述拐角处，所述外扩部为弧形凸面。
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