WO2022198707A1 - 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
WO2022198707A1
WO2022198707A1 PCT/CN2021/084594 CN2021084594W WO2022198707A1 WO 2022198707 A1 WO2022198707 A1 WO 2022198707A1 CN 2021084594 W CN2021084594 W CN 2021084594W WO 2022198707 A1 WO2022198707 A1 WO 2022198707A1
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WO
WIPO (PCT)
Prior art keywords
layer
light
pixel definition
color
display panel
Prior art date
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Ceased
Application number
PCT/CN2021/084594
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English (en)
French (fr)
Inventor
龚文亮
蒋松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US17/293,521 priority Critical patent/US20240298509A1/en
Publication of WO2022198707A1 publication Critical patent/WO2022198707A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • 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
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
    • 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
    • H10K59/17—Passive-matrix OLED displays
    • H10K59/173—Passive-matrix OLED displays comprising banks or shadow masks
    • 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
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • 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
    • H10K59/40—OLEDs integrated with touch screens

Definitions

  • the present invention relates to the field of display, and in particular, to a display panel and a display device.
  • Polarizer can effectively reduce the reflectivity of the panel under strong light, but it loses nearly 58% of the light output. This greatly increases the lifetime burden of organic light-emitting diodes (OLEDs); on the other hand, polarizers are thick and brittle, which is not conducive to the development of dynamic bending products. In order to develop dynamic bending products based on OLED reality technology, new materials, new technologies and new processes must be introduced to replace polarizers.
  • polarizer Color Filter, CF
  • POL polarizer
  • color filter technology has higher surface reflectivity and lower contrast under strong light, which is not conducive to outdoor display.
  • the color filter consists of red (Red), green (Green), blue (Blue) and black matrix (Black Matrix).
  • Red red
  • Green green
  • Blue blue
  • Black Matrix black Matrix
  • the black matrix is directly fabricated on the thin film package.
  • the viewing angle is increased, the brightness and viewing angle decay too fast, which reduces the characteristics of the display.
  • the purpose of the present invention is to provide a display panel and a display device.
  • a black pixel definition layer to replace the black matrix on the thin film package, the disadvantageous factors of fast attenuation of brightness and viewing angle can be effectively solved, and the lack of reflectivity characteristics and low contrast can be avoided. technical problems of defects.
  • an embodiment of the present invention provides a display panel, which includes an array substrate, a pixel definition layer and a color filter layer; the pixel definition layer is disposed on the array substrate, and the pixel definition layer adopts black color. material; the color filter layer is disposed above the pixel definition layer; the color filter layer includes a light-shielding structure, and the light-shielding structure is disposed correspondingly to the pixel definition layer.
  • an upper surface of the pixel definition layer away from the array substrate is provided with a concave-convex structure.
  • the cross-section of the concave-convex structure is zigzag; the cross-section of the grooves or protrusions of the concave-convex structure is trapezoidal or cylindrical.
  • the material of the pixel definition layer is photosensitive polyimide.
  • the display panel further includes touch electrodes disposed between the pixel definition layer and the color filter layer and corresponding to the pixel definition layer.
  • the color filter layer includes a color resist layer
  • the color resist layer includes a plurality of color resist units
  • the projection of the touch electrodes on the array substrate completely falls into the area of the color resist unit on the array substrate.
  • the color resist unit disposed in the area corresponding to the touch electrode forms the light-shielding structure.
  • the color resist units are disposed on the same layer to overlap each other, and two adjacent color resist units overlap each other to form the light-shielding structure, and the light-shielding structure corresponds to the position of the touch electrodes.
  • the color filter layer also includes a black matrix layer, and the black matrix layer includes a plurality of color resistance units arranged at intervals and a black matrix layer arranged between two adjacent color resistance units.
  • the black matrix layer The width of the black matrix layer is smaller than the width of the pixel definition layer; the black matrix layer forms the light-shielding structure.
  • the pixel definition layer includes a plurality of slits, and the width of the slits is smaller than the width of the color resist unit.
  • the present invention also provides a display device having the display panel described in any one of the foregoing.
  • the advantage of the present invention is to provide a display panel and a display device.
  • the black material used in the pixel definition layer is used to prepare a light-absorbing structure to replace the polarizer, and the light-absorbing structure is used to absorb the reflected light of the touch electrode.
  • the light-shielding structure is provided to block, absorb and reflect the light on the upper surface of the touch electrode, and the polarizer structure is not required, which reduces the reflectivity of the surface of the pixel definition layer and improves the light-emitting rate of the light-emitting layer, so there is no need to set a black matrix layer or even if the black matrix layer is provided, the aperture size of the black matrix layer is larger than the slot size of the pixel definition layer, which improves the aperture ratio.
  • FIG. 1 is a schematic structural diagram of an organic light emitting diode display panel in Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of an organic light emitting diode display panel according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural diagram of a step of fabricating the functional layer in Embodiment 3 of the present invention.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • Embodiment 1 of the present invention provides a display panel 100 including an array substrate 1 and a pixel definition layer 2 ; the pixel definition layer 2 is disposed on the array substrate 1 , and the pixel definition layer 2 includes a black material, that is, the black material used in the pixel definition layer 2 is prepared to form a light absorption structure 21, and the light absorption structure 21 is a black nanostructure for absorbing light.
  • the array substrate 1 includes a flexible substrate layer 11 and a driving circuit layer 12 disposed on the flexible substrate layer; the flexible substrate layer 11 is made of PI (polyimide) or hard glass, preferably polyamide imide, which is flexible.
  • the pixel definition layer 2 is disposed on the driving circuit layer 12; the material of the pixel definition layer 2 is photosensitive polyimide (Photosensitive Polyimide, PSPI); the pixel definition layer 2 is provided with a plurality of spaced Slots 22; the upper surface of the pixel definition layer 2 away from the array substrate 1 is provided with irregular or regular concave-convex structures.
  • the cross-section of the concave-convex structure is zigzag.
  • the cross-section of the groove or the protrusion of the concave-convex structure is trapezoidal or cylindrical.
  • the cross-sectional width of the grooves or protrusions is 150nm-250nm, preferably 200nm.
  • the pixel definition layer 2 includes a plurality of the slots 22
  • the display panel 100 further includes a light-emitting layer 3 , and the light-emitting layer 3 is disposed in the slots 22 .
  • the light-emitting layer 3 includes a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit.
  • the display panel 100 further has an encapsulation layer 4 , the encapsulation layer 4 is disposed on the pixel definition layer 2 and completely covers the light emitting layer 3 for blocking water and oxygen.
  • the display panel 100 further has a plurality of touch electrodes 51 , the touch electrodes 51 are disposed on the packaging layer 4 , and the touch electrodes 51 are metal mesh structures formed by interlacing a plurality of metal wires.
  • the touch electrodes 51 are formed of metal grids, and the touch electrodes 51 are disposed correspondingly to the light absorbing structures 21 , and the light absorbing structures 21 are used for absorbing the light reflected by the touch electrodes 51 .
  • the touch electrodes 51 are located in the touch layer 5, and the touch layer 5 is disposed on the pixel definition layer 2; the touch electrodes 51 are disposed above the pixel definition layer 2 and are connected with the pixel definition layer 2.
  • the pixel definition layer 2 is arranged correspondingly, and preferably, the touch electrodes 51 are directly opposite to the pixel definition layer 2 .
  • the display panel 100 further includes a color filter layer 6 disposed on the touch electrodes 51 ; the color filter layer includes a light-shielding structure, and the light-shielding structure is disposed corresponding to the light-absorbing structure 21 .
  • the color filter layer 6 is disposed above the pixel definition layer 2 , the touch electrodes 51 are sandwiched between the color filter layer 6 and the pixel definition layer 2 , and the light shielding
  • the structure can block and absorb the reflected light from the upper surface of the touch electrode 51, and can reflect a part of the light to the light absorbing structure 21.
  • the light absorbing structure 21 is located under the touch electrode 51 and can absorb the touch electrode. The reflected light from the lower surface of 51 and the reflected light from the light shielding structure.
  • the color filter layer 6 includes a color resist layer 61 , the color resist layer 61 includes a plurality of color resist units 611 , and the projection of the touch electrodes 51 on the array substrate 1 completely falls into where the color resist units 611 are located.
  • the color resist units 611 disposed in the corresponding regions of the touch electrodes 51 form the light-shielding structure.
  • the color blocking unit 611 includes a red filter unit, a green filter unit, and a blue filter unit; the red filter unit is arranged corresponding to the red light-emitting unit; the green filter unit is arranged with the green light-emitting unit Correspondingly arranged; the blue filter unit and the blue light emitting unit are arranged correspondingly.
  • the color resist units 611 are disposed adjacent to each other on the same layer, so that the color resist units 611 are arranged on the same layer without gaps.
  • the color resist units 611 are disposed corresponding to the touch electrodes 51 , and play a role of absorbing the light reflected by the touch electrodes 51 , so that a black matrix layer (BM layer) may not be provided.
  • BM layer black matrix layer
  • the display panel 100 further includes an optical adhesive layer 62 and a cover plate 7 ; the optical adhesive layer 62 is disposed on the color filter layer 6 ; the cover plate 7 is disposed on the optical adhesive layer 62 .
  • Designing the light absorbing structure 21 on the upper surface of the pixel definition layer 2 can increase the contact area between ambient light and the light absorbing structure 21 , and the light absorbing structure 21 is a black nanostructure, which increases the light absorption and reduces the mirror surface. Reflection, which can absorb the light reflected by the touch electrodes 51, thereby improving the screen contrast under the synergistic effect; the light absorbing structure 21 is a concave-convex structure, similar to a prism, which can change the light emitting angle of the display panel 100 and increase the viewing angle, Improve readability.
  • the main reason is that the black matrix layer may not be provided, which reduces the cost of the film layer process and reduces the overall thickness of the display panel 100 .
  • Embodiment 2 of the present invention provides a display panel 100 including an array substrate 1 and a pixel definition layer 2 ; the pixel definition layer 2 is disposed on the array substrate 1 , and the pixel definition layer 2.
  • the side away from the array substrate 1 has a light absorbing structure 21.
  • the array substrate 1 includes a flexible substrate layer 11 and a driving circuit layer 12 disposed on the flexible substrate layer; the flexible substrate layer 11 is made of PI (polyimide) or hard glass, preferably polyamide imide, which is flexible.
  • the pixel definition layer 2 is disposed on the driving circuit layer 12; the material of the pixel definition layer 2 is photosensitive polyimide (Photosensitive Polyimide, PSPI); the pixel definition layer 2 is provided with a plurality of spaced Slots 22 ; the black material used in the pixel definition layer 2 is prepared to form the light absorption structure 21 .
  • the light absorbing structure 21 is a black nanostructure for absorbing light.
  • the upper surface of the pixel definition layer 2 away from the array substrate 1 is provided with irregular or regular concave-convex structures.
  • the cross-section of the concave-convex structure is zigzag.
  • the cross-section of the groove or the protrusion of the concave-convex structure is trapezoidal or cylindrical.
  • the cross-sectional width of the grooves or protrusions is 150nm-250nm, preferably 200nm.
  • the pixel definition layer 2 includes a plurality of the slots 22 , and the display panel 100 further includes a light-emitting layer 3 , and the light-emitting layer 3 is disposed in the slots 22 .
  • the light-emitting layer includes a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit.
  • the display panel 100 further has an encapsulation layer 4 , the encapsulation layer 4 is disposed on the pixel definition layer 2 and completely covers the light emitting layer 3 for blocking water and oxygen.
  • the display panel 100 also has a plurality of touch electrodes 51 , the touch electrodes 51 are metal mesh structures, and are formed by a metal mesh formed by a plurality of metal wires interlaced, and the touch electrodes 51 are arranged on the On the packaging layer 4 , the touch electrodes 51 are disposed correspondingly to the light absorbing structures 21 , and the light absorbing structures 21 are used to absorb the light reflected by the touch electrodes 51 .
  • the touch electrodes 51 are located in the touch layer 5, and the touch layer 5 is disposed on the pixel definition layer 2; the touch electrodes 51 are disposed above the pixel definition layer 2 and are connected with the pixel definition layer 2.
  • the pixel definition layer 2 is arranged correspondingly, and preferably, the touch electrodes 51 are directly opposite to the pixel definition layer 2 .
  • the display panel 100 further includes a color filter layer 6 disposed on the touch electrodes 51 ; the color filter layer includes a light-shielding structure, and the light-shielding structure is disposed corresponding to the light-absorbing structure 21 .
  • the color filter layer 6 is disposed above the pixel definition layer 2 , the touch electrodes 51 are sandwiched between the color filter layer 6 and the pixel definition layer 2 , and the light shielding
  • the structure can block and absorb the reflected light from the upper surface of the touch electrode 51, and can reflect a part of the light to the light absorbing structure 21.
  • the light absorbing structure 21 is located under the touch electrode 51 and can absorb the touch electrode. The reflected light from the lower surface of 51 and the reflected light from the light shielding structure.
  • the color filter layer 6 includes a color resist layer 61 , the color resist layer 61 includes a plurality of color resist units 611 , and the projection of the touch electrodes 51 on the array substrate 1 completely falls into where the color resist units 611 are located. within the projection of the array substrate 1 .
  • the color blocking unit 611 includes a red filter unit, a green filter unit, and a blue filter unit; the red filter unit is arranged corresponding to the red light-emitting unit; the green filter unit is arranged with the green light-emitting unit Correspondingly arranged; the blue filter unit and the blue light emitting unit are arranged correspondingly.
  • the light-shielding structure is formed by overlapping between two adjacent color-resist units 611 . Specifically, there is an overlapping area 612 between the two adjacent color-resist units 611 , and the positions of some of the touch electrodes 51 correspond to The overlapping region 612 .
  • the overlapping area 612 is disposed corresponding to the touch electrodes 51 , and plays a role of absorbing the light reflected by the touch electrodes 51 .
  • the position of the overlapping area 612 forms the position of the light shielding structure and the touch electrodes 51 . Accordingly, the black matrix layer (black light shielding layer) may not be provided.
  • the display panel 100 further includes an optical adhesive layer 62 and a cover plate 7 ; the optical adhesive layer 62 is disposed on the color filter layer 6 ; the cover plate 7 is disposed on the optical adhesive layer 62 .
  • Designing the light absorbing structure 21 on the upper surface of the pixel definition layer 2 can increase the contact area between ambient light and the light absorbing structure 21 , and the light absorbing structure 21 is a black nanostructure, which increases the light absorption and reduces the mirror surface. Reflection, which can absorb the light reflected by the touch electrodes 51, thereby improving the screen contrast under the synergistic effect; the light absorbing structure 21 is a concave-convex structure, similar to a prism, which can change the light emitting angle of the display panel 100 and increase the viewing angle, Improve readability.
  • the black matrix layer may not be provided, which reduces the cost of the film layer process and reduces the overall thickness of the display panel 100 .
  • Embodiment 3 of the present invention provides a display panel 100 , which includes an array substrate 1 and a pixel definition layer 2 ; the pixel definition layer 2 is disposed on the array substrate 1 , and the pixel definition layer 2.
  • the side away from the array substrate 1 has a light absorbing structure 21.
  • the array substrate 1 includes a flexible substrate layer 11 and a driving circuit layer 12 disposed on the flexible substrate layer; the flexible substrate layer 11 is made of PI (polyimide) or hard glass, preferably polyamide imide, which is flexible.
  • the pixel definition layer 2 is disposed on the driving circuit layer 12; the material of the pixel definition layer 2 is photosensitive polyimide (Photosensitive Polyimide, PSPI); the pixel definition layer 2 is provided with a plurality of spaced Slots 22 ; the black material used in the pixel definition layer 2 is prepared to form the light absorption structure 21 .
  • the light absorbing structure 21 is a black nanostructure for absorbing light.
  • the upper surface of the pixel definition layer 2 away from the array substrate 1 is provided with irregular or regular concave-convex structures.
  • the cross-section of the concave-convex structure is zigzag.
  • the cross-section of the groove or the protrusion of the concave-convex structure is trapezoidal or cylindrical.
  • the cross-sectional width of the grooves or protrusions is 150nm-250nm, preferably 200nm.
  • the pixel definition layer 2 includes a plurality of the slots 22 , and the display panel 100 further includes a light-emitting layer 3 , and the light-emitting layer 3 is disposed in the slots 22 .
  • the light-emitting layer includes a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit.
  • the display panel 100 further has an encapsulation layer 4 , the encapsulation layer 4 is disposed on the pixel definition layer 2 and completely covers the light emitting layer 3 for blocking water and oxygen.
  • the display panel 100 also has a plurality of touch electrodes 51 , the touch electrodes 51 are metal mesh structures, and are formed by a metal mesh formed by a plurality of metal wires interlaced, and the touch electrodes 51 are arranged on the On the packaging layer 4 , the touch electrodes 51 are disposed correspondingly to the light absorbing structures 21 , and the light absorbing structures 21 are used to absorb the light reflected by the touch electrodes 51 .
  • the touch electrodes 51 are located in the touch layer 5, and the touch layer 5 is disposed on the pixel definition layer 2; the touch electrodes 51 are disposed above the pixel definition layer 2 and are connected with the pixel definition layer 2.
  • the pixel definition layer 2 is arranged correspondingly, and preferably, the touch electrodes 51 are directly opposite to the pixel definition layer 2 .
  • the display panel 100 further includes a color filter layer 6 disposed on the touch electrodes 51 ; the color filter layer includes a light-shielding structure, and the light-shielding structure is disposed corresponding to the light-absorbing structure 21 .
  • the color filter layer 6 is disposed above the pixel definition layer 2 , the touch electrodes 51 are sandwiched between the color filter layer 6 and the pixel definition layer 2 , and the light shielding
  • the structure can block and absorb the reflected light from the upper surface of the touch electrode 51, and can reflect a part of the light to the light absorbing structure 21.
  • the light absorbing structure 21 is located under the touch electrode 51 and can absorb the touch electrode. The reflected light from the lower surface of 51 and the reflected light from the light shielding structure.
  • the color filter layer 6 includes a color resist layer 61 , the color resist layer 61 includes a plurality of color resist units 611 , and the projection of the touch electrodes 51 on the array substrate 1 completely falls into where the color resist units 611 are located. within the projection of the array substrate 1 .
  • the color blocking unit 611 includes a red filter unit, a green filter unit, and a blue filter unit; the red filter unit is arranged corresponding to the red light-emitting unit; the green filter unit is arranged with the green light-emitting unit Correspondingly arranged; the blue filter unit and the blue light emitting unit are arranged correspondingly.
  • the color filter layer 6 further includes a black matrix layer 63 (BM layer), the black matrix layer 63 includes a plurality of openings 621 , and the color resist unit 611 is disposed in the openings 621 and covers The edge of the black matrix layer 63; the position of the touch electrode 51 corresponds to the black matrix layer 63; the black matrix layer 63 forms the light-shielding structure.
  • the width of the slot 22 in the pixel definition layer 2 is smaller than the width of the color resist unit 611 , that is, the forward projection of the slot 22 on the black matrix layer 63 completely falls into the opening 621 Inside. That is, the size of the opening 621 of the black matrix layer 63 is also larger than the size of the slot 22 of the pixel definition layer 2, which improves the aperture ratio.
  • the black matrix layer 63 includes a plurality of light-shielding units; the red filter unit, the green filter unit, and the blue filter unit are spaced apart from each other, and the light-shielding unit is corresponding to the red filter unit , Between the green filter unit and the blue filter unit, the light shielding unit is disposed opposite to all the touch electrodes 51 ; the width of the opening 621 is the width between the two adjacent light shielding units. The width of the opening 621 is larger than the width of the slot 22 .
  • Designing the light absorbing structure 21 on the upper surface of the pixel definition layer 2 can increase the contact area between ambient light and the light absorbing structure 21 , and the light absorbing structure 21 is a black nanostructure, which increases the light absorption and reduces the mirror surface. Reflection, which can absorb the light reflected by the touch electrodes 51, thereby improving the screen contrast under the synergistic effect; the light absorbing structure 21 is a concave-convex structure, similar to a prism, which can change the light emitting angle of the display panel 100 and increase the viewing angle, Improve readability.
  • the width of the opening 621 is larger than the width of the slot 22 , which can directly increase the aperture ratio.
  • the advantage of the present invention is to provide a display panel and a display device.
  • the black material used in the pixel definition layer is used to prepare a light-absorbing structure to replace the polarizer, and the light-absorbing structure is used to absorb the reflected light of the touch electrode.
  • the light-shielding structure is provided to block, absorb and reflect the light on the upper surface of the touch electrode, and the polarizer structure is not required, which reduces the reflectivity of the surface of the pixel definition layer and improves the light-emitting rate of the light-emitting layer, so there is no need to set a black matrix layer or even if the black matrix layer is provided, the aperture size of the black matrix layer is larger than the slot size of the pixel definition layer, which improves the aperture ratio.

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Abstract

一种显示面板及显示装置。在像素定义层（2）采用黑色材料制备形成吸光结构（21）替代偏光片，吸光结构（21）用于吸收触控电极（51）的反射光线，在彩膜层（6）一侧设置遮光结构遮挡、吸收及反射触控电极（51）上表面的光线，不需设置偏光片结构，降低了像素定义层（2）表面的反射率的同时提高了发光层（3）的出光率，从而不需设置黑色矩阵层或者即使设置黑色矩阵层，黑色矩阵层的开口尺寸也大于像素定义层（2）的开槽尺寸，提高了开口率。

Description

显示面板及显示装置 技术领域
本发明涉及显示领域，尤其涉及一种显示面板及显示装置。
 背景技术
偏光片（POL）能够有效地降低强光下面板的反射率，却损失了接近58%的出光。这对于有机发光二极管（OLED）来说，极大地增加了其寿命负担；另一方面，偏光片厚度较大、材质脆，不利于动态弯折产品的开发。为了开发基于OLED现实技术的动态弯折产品，必须导入新材料、新技术以及新工艺替代偏光片。
使用偏光层（Color Filter，CF）替代偏光片（POL）的被归属为POL-less技术，它不仅能将功能层的厚度从大约100μm降低至约5μm；而且能够将OLED的出光率从42%提高至60%。
然而，相对于偏光片，彩膜技术的表面反射率较高，强光下的对比度较低，不利于室外显示。彩膜由红（Red）、绿(Green)、蓝（Blue）以及黑色矩阵（Black Matrix）组成。在OLED面板之中，R/G/B色阻分别承担着对应发光层 R/G/B子像素单元的出光；而黑色矩阵则主要承担着防止面板的漏光与降低面板的反射的作用。
现有实施方案中，黑色矩阵直接制作在薄膜封装上，视角增大的情况下，亮度视角衰减过快，降低了显示器的特性。
 技术问题
本发明的目的在于，提供一种显示面板及显示装置，通过采用黑色像素定义层替代薄膜封装上的黑色矩阵，可以有效地解决亮度视角衰减快的不利因素，避免反射率特性不足，对比度较低的缺陷的技术问题。
 技术解决方案
为了解决上述问题，本发明一实施例中提供一种显示面板，包括阵列基板、像素定义层以及彩膜层；所述像素定义层设置在所述阵列基板上，所述像素定义层采用的黑色材质；所述彩膜层设置在所述像素定义层的上方；所述彩膜层包括遮光结构，所述遮光结构与所述像素定义层对应设置。
进一步地，所述像素定义层远离阵列基板的上表面设有凹凸结构。
进一步地，所述凹凸结构的横截面呈锯齿型；所述凹凸结构的凹槽或凸起的横截面呈梯形或柱形。
进一步地，所述像素定义层的材质为光敏聚酰亚胺。
进一步地，所述显示面板还包括触控电极，设于所述像素定义层与所述彩膜层之间，且与所述像素定义层对应设置。
进一步地，所述彩膜层包括色阻层，所述色阻层包括若干色阻单元，所述触控电极在所述阵列基板的投影完全落入所述色阻单元在所述阵列基板的投影内；与所述触控电极对应区域设置的所述色阻单元形成所述遮光结构。
进一步地，所述色阻单元在同一层相互交叠设置，相邻的两个色阻单元之间相互交叠形成所述遮光结构，所述遮光结构与触控电极的位置对应。
进一步地，所述彩膜层中还包括黑色矩阵层，所述黑色矩阵层包括间隔设置的多个色阻单元及设置在相邻两个色阻单元间的黑色矩阵层，所述黑色矩阵层的宽度小于所述像素定义层的宽度；所述黑色矩阵层形成所述遮光结构。
进一步地，所述像素定义层包括若干开槽，所述开槽的宽度小于所述色阻单元的宽度。
本发明还提供一种显示装置，具有前文任意一项所述的显示面板。
 有益效果
本发明的优点在于，提供一种显示面板及显示装置，采用在像素定义层采用的黑色材料制备形成吸光结构替代偏光片，吸光结构用于吸收触控电极的反射光线，在彩膜层一侧设置遮光结构遮挡、吸收及反射所述触控电极上表面的光线，不需设置偏光片结构，降低了像素定义层表面的反射率的同时提高了发光层的出光率，从而不需设置黑色矩阵层或者即使设置黑色矩阵层，黑色矩阵层的开口尺寸也大于像素定义层的开槽尺寸，提高了开口率。
 附图说明
图1为本发明实施例一中一种有机发光二极管显示面板的结构示意图；
图2为本发明实施例二中一种有机发光二极管显示面板的结构示意图；
图3为本发明实施例三中制作所述功能层步骤的结构示意图。
图中部件标识如下：
1、阵列基板，2、像素定义层，3、发光层，
4、封装层，5、触控层，6、彩膜层，
7、盖板，21、吸光结构，22、开槽，
51、触控电极，61、色阻层，62、光学胶层，
63、黑色矩阵层，100、显示面板，611、色阻单元，
612、交叠区，621、开口。
 本发明的实施方式
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本发明中，相同或相对应的部件用相同的附图标记表示而与图号无关，在说明书全文中，当“第一”、“第二”等措辞可用于描述各种部件时，这些部件不必限于以上措辞。以上措辞仅用于将一个部件与另一部件区分开。
实施例一
请参阅图1所示，本发明实施例1中提供一种显示面板100，包括阵列基板1以及像素定义层2；所述像素定义层2设置在所述阵列基板1上，所述像素定义层2包括黑色材质，即所述像素定义层2采用的黑色材质制备形成吸光结构21，所述吸光结构21为黑色的纳米结构，用于吸收光线。
其中，所述阵列基板1包括柔性衬底层11和设于所述柔性衬底层上的驱动电路层12；所述柔性衬底层11的材质为PI（聚酰亚胺）或硬性玻璃，优选为聚酰亚胺，其具有柔性。所述像素定义层2设于所述驱动电路层12上；所述像素定义层2的材质为光敏聚酰亚胺（Photosensitive Polyimide，PSPI）；所述像素定义层2设有多个间隔设置的开槽22；所述像素定义层2远离阵列基板1的上表面设有不规则的或者规则的凹凸结构。所述凹凸结构的横截面呈锯齿型。所述凹凸结构的凹槽或凸起的横截面呈梯形或柱形。所述凹槽或凸起的横截面宽度尺寸为150nm-250nm，优选为200nm。
所述像素定义层2包括若干所述开槽22，所述显示面板100还具有发光层3，所述发光层3设于所述开槽22中。所述发光层3包括红色发光单元、绿色发光单元、蓝色发光单元。
所述显示面板100还具有封装层4，所述封装层4设于所述像素定义层2上且完全覆盖所述发光层3，用于阻隔水氧。
所述显示面板100还具有多个触控电极51，所述触控电极51设于所述封装层4上，所述触控电极51为金属网格结构，由多条金属走线交错形成的金属网格构成，所述触控电极51与所述吸光结构21对应设置，所述吸光结构21用于吸收所述触控电极51反射的光线。优选所述触控电极51位于触控层5内，所述触控层5设于所述像素定义层2上；所述触控电极51设于所述像素定义层2的上方且与所述像素定义层2对应设置，优选所述触控电极51与所述像素定义层2正对。
所述显示面板100还包括彩膜层6，设于所述触控电极51上；所述彩膜层中包括遮光结构，所述遮光结构与所述吸光结构21对应设置。可理解的是，所述彩膜层6设置在所述像素定义层2的上方，所述触控电极51夹设于所述彩膜层6和所述像素定义层2之间，所述遮光结构能够遮挡、吸收所述触控电极51上表面的反射光线，并能反射一部分光线至所述吸光结构21，所述吸光结构21位于所述触控电极51下方，能够吸收所述触控电极51下表面的反射光以及来自所述遮光结构的反射光。
所述彩膜层6包括色阻层61，所述色阻层61包括若干色阻单元611，所述触控电极51在所述阵列基板1的投影完全落入所述色阻单元611在所述阵列基板1的投影内；与所述触控电极51对应区域设置的所述色阻单元611形成所述遮光结构。所述色阻单元611包括红色滤光单元、绿色滤光单元、蓝色滤光单元；所述红色滤光单元与所述红色发光单元对应设置；所述绿色滤光单元与所述绿色发光单元对应设置；所述蓝色滤光单元与所述蓝色发光单元对应设置。
在本实施例中，所述色阻单元611在同一层相临设置，实现所述色阻单元611之间无间隙地同层排列。所述色阻单元611与所述触控电极51对应设置，起到吸收所述触控电极51反射的光线的作用，从而可以不设置黑色矩阵层（BM层）。
所述显示面板100还包括光学胶层62以及盖板7；所述光学胶层62设于所述彩膜层6上；所述盖板7设于所述光学胶层62上。
在所述像素定义层2上表面设计所述吸光结构21能够增加环境光与所述吸光结构21的接触面积，且所述吸光结构21为黑色的纳米结构，增加对光的吸收量，减少镜面反射，可以吸收所述触控电极51反射的光线，从而在协同作用下提升屏幕对比度；所述吸光结构21为凹凸结构，类似棱镜，可改变所述显示面板100出光角度，增大可视角，提高可阅读性。主要是可以不设置黑色矩阵层，减少膜层制程成本以及减少所述显示面板100的整体厚度。
实施例二
请参阅图2所示，本发明实施例2中提供一种显示面板100，包括阵列基板1以及像素定义层2；所述像素定义层2设置在所述阵列基板1上，所述像素定义层2远离所述阵列基板1的一面具有吸光结构21。
其中，所述阵列基板1包括柔性衬底层11和设于所述柔性衬底层上的驱动电路层12；所述柔性衬底层11的材质为PI（聚酰亚胺）或硬性玻璃，优选为聚酰亚胺，其具有柔性。所述像素定义层2设于所述驱动电路层12上；所述像素定义层2的材质为光敏聚酰亚胺（Photosensitive Polyimide，PSPI）；所述像素定义层2设有多个间隔设置的开槽22；所述像素定义层2采用的黑色材料制备形成所述吸光结构21。所述吸光结构21为黑色的纳米结构，用于吸收光线。所述像素定义层2远离阵列基板1的上表面设有不规则的或者规则的凹凸结构。所述凹凸结构的横截面呈锯齿型。所述凹凸结构的凹槽或凸起的横截面呈梯形或柱形。所述凹槽或凸起的横截面宽度尺寸为150nm-250nm，优选为200nm。
所述像素定义层2包括若干所述开槽22，所述显示面板100还具有发光层3，所述发光层3设于所述开槽22中。所述发光层包括红色发光单元、绿色发光单元、蓝色发光单元。
所述显示面板100还具有封装层4，所述封装层4设于所述像素定义层2上且完全覆盖所述发光层3，用于阻隔水氧。
所述显示面板100还具有多个触控电极51，所述触控电极51为金属网格结构，由多条金属走线交错形成的金属网格构成，所述触控电极51设于所述封装层4上，所述触控电极51与所述吸光结构21对应设置，所述吸光结构21用于吸收所述触控电极51反射的光线。优选所述触控电极51位于触控层5内，所述触控层5设于所述像素定义层2上；所述触控电极51设于所述像素定义层2的上方且与所述像素定义层2对应设置，优选所述触控电极51与所述像素定义层2正对。
所述显示面板100还包括彩膜层6，设于所述触控电极51上；所述彩膜层中包括遮光结构，所述遮光结构与所述吸光结构21对应设置。可理解的是，所述彩膜层6设置在所述像素定义层2的上方，所述触控电极51夹设于所述彩膜层6和所述像素定义层2之间，所述遮光结构能够遮挡、吸收所述触控电极51上表面的反射光线，并能反射一部分光线至所述吸光结构21，所述吸光结构21位于所述触控电极51下方，能够吸收所述触控电极51下表面的反射光以及来自所述遮光结构的反射光。
所述彩膜层6包括色阻层61，所述色阻层61包括若干色阻单元611，所述触控电极51在所述阵列基板1的投影完全落入所述色阻单元611在所述阵列基板1的投影内。所述色阻单元611包括红色滤光单元、绿色滤光单元、蓝色滤光单元；所述红色滤光单元与所述红色发光单元对应设置；所述绿色滤光单元与所述绿色发光单元对应设置；所述蓝色滤光单元与所述蓝色发光单元对应设置。
在相邻的两个色阻单元611之间相互交叠形成所述遮光结构，具体的在相邻的两个色阻单元611之间具有交叠区612，部分触控电极51的位置对应于所述交叠区612。所述交叠区612与所述触控电极51对应设置，起到吸收所述触控电极51反射的光线的作用，所述交叠区612位置形成所述遮光结构与触控电极51的位置对应，从而可以不设置黑色矩阵层（黑色遮光层）。
所述显示面板100还包括光学胶层62以及盖板7；所述光学胶层62设于所述彩膜层6上；所述盖板7设于所述光学胶层62上。
在所述像素定义层2上表面设计所述吸光结构21能够增加环境光与所述吸光结构21的接触面积，且所述吸光结构21为黑色的纳米结构，增加对光的吸收量，减少镜面反射，可以吸收所述触控电极51反射的光线，从而在协同作用下提升屏幕对比度；所述吸光结构21为凹凸结构，类似棱镜，可改变所述显示面板100出光角度，增大可视角，提高可阅读性。同时利用两个相邻的色阻单元611之间相互交叠形成的交叠区612，可以不设置黑色矩阵层，减少膜层制程成本以及减少所述显示面板100的整体厚度。
实施例三
请参阅图3所示，本发明实施例3中提供一种显示面板100，包括阵列基板1以及像素定义层2；所述像素定义层2设置在所述阵列基板1上，所述像素定义层2远离所述阵列基板1的一面具有吸光结构21。
其中，所述阵列基板1包括柔性衬底层11和设于所述柔性衬底层上的驱动电路层12；所述柔性衬底层11的材质为PI（聚酰亚胺）或硬性玻璃，优选为聚酰亚胺，其具有柔性。所述像素定义层2设于所述驱动电路层12上；所述像素定义层2的材质为光敏聚酰亚胺（Photosensitive Polyimide，PSPI）；所述像素定义层2设有多个间隔设置的开槽22；所述像素定义层2采用的黑色材料制备形成所述吸光结构21。所述吸光结构21为黑色的纳米结构，用于吸收光线。所述像素定义层2远离阵列基板1的上表面设有不规则的或者规则的凹凸结构。所述凹凸结构的横截面呈锯齿型。所述凹凸结构的凹槽或凸起的横截面呈梯形或柱形。所述凹槽或凸起的横截面宽度尺寸为150nm-250nm，优选为200nm。
所述像素定义层2包括若干所述开槽22，所述显示面板100还具有发光层3，所述发光层3设于所述开槽22中。所述发光层包括红色发光单元、绿色发光单元、蓝色发光单元。
所述显示面板100还具有封装层4，所述封装层4设于所述像素定义层2上且完全覆盖所述发光层3，用于阻隔水氧。
所述显示面板100还具有多个触控电极51，所述触控电极51为金属网格结构，由多条金属走线交错形成的金属网格构成，所述触控电极51设于所述封装层4上，所述触控电极51与所述吸光结构21对应设置，所述吸光结构21用于吸收所述触控电极51反射的光线。优选所述触控电极51位于触控层5内，所述触控层5设于所述像素定义层2上；所述触控电极51设于所述像素定义层2的上方且与所述像素定义层2对应设置，优选所述触控电极51与所述像素定义层2正对。
所述显示面板100还包括彩膜层6，设于所述触控电极51上；所述彩膜层中包括遮光结构，所述遮光结构与所述吸光结构21对应设置。可理解的是，所述彩膜层6设置在所述像素定义层2的上方，所述触控电极51夹设于所述彩膜层6和所述像素定义层2之间，所述遮光结构能够遮挡、吸收所述触控电极51上表面的反射光线，并能反射一部分光线至所述吸光结构21，所述吸光结构21位于所述触控电极51下方，能够吸收所述触控电极51下表面的反射光以及来自所述遮光结构的反射光。
所述彩膜层6包括色阻层61，所述色阻层61包括若干色阻单元611，所述触控电极51在所述阵列基板1的投影完全落入所述色阻单元611在所述阵列基板1的投影内。所述色阻单元611包括红色滤光单元、绿色滤光单元、蓝色滤光单元；所述红色滤光单元与所述红色发光单元对应设置；所述绿色滤光单元与所述绿色发光单元对应设置；所述蓝色滤光单元与所述蓝色发光单元对应设置。
在本实施例中，所述彩膜层6中还包括黑色矩阵层63（BM层），所述黑色矩阵层63包括若干开口621，所述色阻单元611设置在所述开口621中且覆盖所述黑色矩阵层63的边缘；所述触控电极51的位置对应于所述黑色矩阵层63；所述黑色矩阵层63形成所述遮光结构。所述像素定义层2中的开槽22的宽度小于所述色阻单元611的宽度，亦即所述开槽22在所述黑色矩阵层63上的正向投影完全落入于所述开口621内。即所述黑色矩阵层63的开口621尺寸也大于像素定义层2的开槽22尺寸，提高了开口率。
所述黑色矩阵层63包括多个遮光单元；所述红色滤光单元、所述绿色滤光单元、所述蓝色滤光单元相互间隔设置，所述遮光单元对应设于所述红色滤光单元、所述绿色滤光单元、所述蓝色滤光单元之间，所述遮光单元与所有的所述触控电极51相对设置；所述开口621的宽度为相邻两个所述遮光单元之间的宽度，所述开口621的宽度大于所述开槽22的宽度。
在所述像素定义层2上表面设计所述吸光结构21能够增加环境光与所述吸光结构21的接触面积，且所述吸光结构21为黑色的纳米结构，增加对光的吸收量，减少镜面反射，可以吸收所述触控电极51反射的光线，从而在协同作用下提升屏幕对比度；所述吸光结构21为凹凸结构，类似棱镜，可改变所述显示面板100出光角度，增大可视角，提高可阅读性。同时所述开口621的宽度大于所述开槽22的宽度，可以直接提升开口率。
本发明的优点在于，提供一种显示面板及显示装置，采用在像素定义层采用的黑色材料制备形成吸光结构替代偏光片，吸光结构用于吸收触控电极的反射光线，在彩膜层一侧设置遮光结构遮挡、吸收及反射所述触控电极上表面的光线，不需设置偏光片结构，降低了像素定义层表面的反射率的同时提高了发光层的出光率，从而不需设置黑色矩阵层或者即使设置黑色矩阵层，黑色矩阵层的开口尺寸也大于像素定义层的开槽尺寸，提高了开口率。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (20)

  1. 一种显示面板，其中，包括：
    阵列基板；
    像素定义层，设置在所述阵列基板上，所述像素定义层包括黑色材质；以及
    彩膜层，设置在所述像素定义层的上方；所述彩膜层包括遮光结构，所述遮光结构与所述吸光结构对应设置。
  2. 根据权利要求1所述的显示面板，其中，所述像素定义层远离阵列基板的上表面设有凹凸结构。
  3. 根据权利要求2所述的显示面板，其中，所述凹凸结构的横截面呈锯齿型。
  4. 根据权利要求3所述的显示面板，其中，所述凹凸结构的凹槽或凸起的横截面呈梯形或柱形。
  5. 根据权利要求1所述的显示面板，其中，所述像素定义层的材质为光敏聚酰亚胺。
  6. 根据权利要求1所述的显示面板，其中，还包括触控电极，设于所述像素定义层与所述彩膜层之间，且与所述像素定义层对应设置。
  7. 根据权利要求6所述的显示面板，其中，所述彩膜层包括色阻层，所述色阻层包括若干色阻单元，所述触控电极在所述阵列基板的投影完全落入所述色阻单元在所述阵列基板的投影内；与所述触控电极对应区域设置的所述色阻单元形成所述遮光结构。
  8. 根据权利要求7所述的显示面板，其中，相邻的两个色阻单元相互交叠形成所述遮光结构，所述遮光结构与触控电极的位置对应。
  9. 根据权利要求6所述的显示面板，其中，所述彩膜层包括间隔设置的多个色阻单元及设置在相邻两个色阻单元间的黑色矩阵层，所述黑色矩阵层的宽度小于所述像素定义层的宽度；所述黑色矩阵层形成所述遮光结构。
  10. 根据权利要求9所述的显示面板，其中，所述像素定义层包括若干开槽，所述开槽的宽度小于所述色阻单元的宽度。
  11. 一种显示装置，其具有显示面板；其中，所述显示面板包括：
    阵列基板；
    像素定义层，设置在所述阵列基板上，所述像素定义层包括黑色材质；以及
    彩膜层，设置在所述像素定义层的上方；所述彩膜层包括遮光结构，所述遮光结构与所述吸光结构对应设置。
  12. 根据权利要求11所述的显示装置，其中，所述像素定义层远离阵列基板的上表面设有凹凸结构。
  13. 根据权利要求12所述的显示装置，其中，所述凹凸结构的横截面呈锯齿型。
  14. 根据权利要求13所述的显示装置，其中，所述凹凸结构的凹槽或凸起的横截面呈梯形或柱形。
  15. 根据权利要求11所述的显示装置，其中，所述像素定义层的材质为光敏聚酰亚胺。
  16. 根据权利要求11所述的显示装置，其中，还包括触控电极，设于所述像素定义层与所述彩膜层之间，且与所述像素定义层对应设置。
  17. 根据权利要求16所述的显示装置，其中，所述彩膜层包括色阻层，所述色阻层包括若干色阻单元，所述触控电极在所述阵列基板的投影完全落入所述色阻单元在所述阵列基板的投影内；与所述触控电极对应区域设置的所述色阻单元形成所述遮光结构。
  18. 根据权利要求17所述的显示装置，其中，相邻的两个色阻单元相互交叠形成所述遮光结构，所述遮光结构与触控电极的位置对应。
  19. 根据权利要求16所述的显示装置，其中，所述彩膜层包括间隔设置的多个色阻单元及设置在相邻两个色阻单元间的黑色矩阵层，所述黑色矩阵层的宽度小于所述像素定义层的宽度；所述黑色矩阵层形成所述遮光结构。
  20. 根据权利要求19所述的显示装置，其中，所述像素定义层包括若干开槽，所述开槽的宽度小于所述色阻单元的宽度。
PCT/CN2021/084594 2001-05-13 2021-03-31 显示面板及显示装置 Ceased WO2022198707A1 (zh)

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