WO2024255639A1 - 显示面板、拼接屏和显示装置 - Google Patents

显示面板、拼接屏和显示装置 Download PDF

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Publication number
WO2024255639A1
WO2024255639A1 PCT/CN2024/097155 CN2024097155W WO2024255639A1 WO 2024255639 A1 WO2024255639 A1 WO 2024255639A1 CN 2024097155 W CN2024097155 W CN 2024097155W WO 2024255639 A1 WO2024255639 A1 WO 2024255639A1
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WO
WIPO (PCT)
Prior art keywords
area
light
display
filter
display panel
Prior art date
Application number
PCT/CN2024/097155
Other languages
English (en)
French (fr)
Inventor
张云鹏
何祥飞
杨晶利
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
北京京东方技术开发有限公司
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司, 北京京东方技术开发有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2024255639A1 publication Critical patent/WO2024255639A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]

Definitions

  • the present application relates to the field of display technology, and in particular to a display panel, a spliced screen and a display device.
  • the present application provides a display panel, a spliced screen and a display device.
  • the display panel includes: a substrate, a pixel defining layer, a plurality of light-emitting units, and a color filter layer.
  • the pixel defining layer is located on one side of the substrate, and the pixel defining layer includes a plurality of pixel openings and a plurality of pixel defining units. A plurality of light-emitting units are located in the plurality of pixel openings.
  • the color filter layer is located on a side of the pixel defining layer away from the substrate, and the color filter layer includes a black matrix and a plurality of filter units, the black matrix is arranged corresponding to the plurality of pixel defining units, and the plurality of filter units are arranged corresponding to the plurality of light-emitting units.
  • the plurality of filter units include a first filter unit located in the first filter area and a second filter unit located in the second filter area, wherein a size of the first filter unit in a direction perpendicular to the display panel is smaller than a size of the second filter unit in a direction perpendicular to the display panel.
  • the black matrix includes a first black matrix located in the first display area and a second black matrix located in the second display area, wherein an area of the first black matrix close to the pixel defining layer is smaller than an area of the second black matrix close to the pixel defining layer.
  • the display panel further comprises a driving circuit layer located in the display area.
  • the driving circuit layer is located on a side of the substrate close to the pixel defining layer, and the driving circuit layer is electrically connected to the plurality of light-emitting units.
  • the driving circuit layer includes a plurality of pixel driving circuits, wherein the plurality of pixel driving circuits are electrically connected to the plurality of light emitting units in a one-to-one correspondence.
  • the driving circuit layer includes a plurality of pixel driving circuits, wherein the plurality of pixel driving circuits are electrically connected to the plurality of light emitting units in a one-to-many correspondence.
  • the driving circuit layer includes a plurality of pixel driving circuits, wherein the plurality of pixel driving circuits are electrically connected to the plurality of light emitting units in a one-to-many correspondence.
  • the frame area includes: an edge luminous material defining area and an edge luminous material unit.
  • the edge luminous material defining area is located in the pixel defining layer and is formed with a plurality of defining areas and defining grooves.
  • the edge luminous material unit is located in the defining groove.
  • the light emitting unit includes a plurality of sub-light emitting units, and the sub-light emitting units in the first display area and the sub-light emitting units in the second display area are arranged in the same manner.
  • the border area includes a dam portion, wherein, on a side of the dam portion close to the display area, a distance from a V-shaped groove closest to the dam portion to the dam portion is smaller than a distance from an isolation column closest to the dam portion to the dam portion.
  • an orthographic projection of the black matrix on the substrate at least partially overlaps with an orthographic projection of the V-shaped groove and the isolation column on the substrate.
  • the length of the black matrix in the border area is greater than the length of the black matrix in the first display area and the second display area.
  • a spliced screen comprising a plurality of display panels provided in the aforementioned embodiment, wherein the frame areas of the plurality of display panels are spliced with each other.
  • a display device including the display panel or spliced screen provided in the above embodiments.
  • FIG. 1 is a schematic diagram of the arrangement of light-emitting units of a spliced screen in the related art.
  • FIG3 is a cross-sectional view of a portion of a film layer of a display panel taken along dotted line AA′ in FIG2 provided in an embodiment of the present application.
  • FIG4 is another cross-sectional view of a portion of the film layer of the display panel obtained along the dotted line AA′ in FIG2 provided in an embodiment of the present application.
  • FIG5 is another cross-sectional view of a portion of a film layer of a display panel taken along dotted line AA′ in FIG2 provided in an embodiment of the present application.
  • FIG6 is another cross-sectional view of a portion of the film layer of the display panel obtained along the dotted line AA′ in FIG2 provided in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a film layer of a display panel provided in an embodiment of the present application.
  • OLED Organic Light-Emitting Diode
  • the spliced screen is made up of multiple independent display screens, and there is a seam D between the two spliced screens (as shown in Figure 1).
  • the existence of the seam makes the pixel pitch at the splicing position inconsistent with the central area, and the pixel pitch at the seam is larger, resulting in a sense of screen fragmentation during display.
  • the size of the seam directly affects the display effect. For example, the conventional narrow seam of LCD (Liquid Crystal Display) is larger, and the content cannot be displayed in the seam area, which will cause a sense of display fragmentation, so the seam size needs to be reduced.
  • the product can use auxiliary cathode technology to distribute the VSS ground wire in the middle of the AA area (Active Area, touchable area), thereby improving the impact of the VSS ground wire on the frame.
  • the package frame cannot be eliminated but can only be reduced under the existing OLED technology, so the seam always exists.
  • the pixel structure of OLED is large, combined with the large aperture ratio design of OLED and the limitations of the refined mask, resulting in the border area at the splicing not emitting light and the gap (space) is larger, so the purpose of improving the display effect cannot be achieved.
  • the display panel, spliced screen and display device provided in this application are intended to solve the above technical problems of related technologies.
  • the embodiment of the present application provides a display panel, as shown in FIG2 , including a display area AA and a frame area NA at least partially surrounding the display area AA.
  • the display area AA includes a first display area AA1 adjacent to the frame area NA, and a second display area AA2 located on a side of the first display area AA1 away from the frame area NA.
  • the light-transmitting area of the first display area AA1 is greater than the light-transmitting area of the second display area AA2.
  • the light-transmitting area of the first display area AA1 is greater than the light-transmitting area of the second display area AA2.
  • the first display area AA1 and the border area NA adjacent to the first display area AA1 can be regarded as a whole as an "edge area”, and the border area NA can be regarded as a non-luminous area within the "edge area”. As shown in FIG.
  • the light-emitting area of the edge area (the first display area AA1 and the border area NA) within a unit area is smaller than the light-emitting area of the second display area AA2 within a unit area, and the non-luminous area of the edge area can be used to form the border area NA.
  • the edge area (the first display area AA1 and the frame area NA) is within the area with a unit area of 3*4 light-emitting units 100, that is, the edge area is within the area including SAA1 (2 light-emitting units 100 in the horizontal direction, 4 light-emitting units 100 in the vertical direction, and 2*4 light-emitting units 100 can be used for the light-emitting area) and SNA (1 light-emitting unit 100 in the horizontal direction, 4 light-emitting units 100 in the vertical direction, and 1*4 light-emitting unit is not used for the light-emitting area), and its light-emitting area is 2*4 light-emitting units 100; the second display area AA2 is within the area with a unit area of 3*4 light-emitting units 100, and the light
  • the light-emitting area may refer to the positive projection area of the light-emitting unit 100 or the sub-light-emitting unit on the substrate
  • the light-transmitting area may refer to the positive projection area of the light-emitting unit 100 or the sub-light-emitting unit that controls the light emission on the substrate, such as the positive projection area of the light-emitting unit 100 or the sub-light-emitting unit's filter area on the substrate.
  • the unit area may be a plurality of light-emitting units 100 or sub-light-emitting units, or may be one light-emitting unit 100 or one sub-light-emitting unit.
  • the present application forms the frame area NA by sacrificing the light-emitting area of the light-emitting unit adjacent to the frame in the related art, so as to increase the screen-to-body ratio of the independent display screen or improve the sense of fragmentation of the display screen caused by the seam area of the spliced screen.
  • the life of the light-emitting unit in the edge area per unit area and the light-emitting unit in the second display area AA2 will be different, resulting in uneven life of the light-emitting units in various areas of the display screen, which will affect the screen display and user experience.
  • the light-transmitting area of the first display area AA1 so that the light-transmitting area of the first display area AA1 is larger than the light-transmitting area of the second display area AA2, and at the same time adjusting the light-emitting intensity of the light-emitting unit of the first display area AA1 to be less than the light-emitting intensity of the second display area AA2 in the working state, it is possible to extend the light-emitting life of the light-emitting unit of the first display area AA1 while ensuring the display brightness of the light-emitting unit is consistent, so that the life of the light-emitting unit in the edge area per unit area is the same as the life of the light-emitting unit in the second display area AA2, thereby ensuring the display quality of the display panel and visually weakening the influence of the border area NA on the display effect of the display panel, thereby increasing the screen-to-body ratio in terms of visual effect, weakening the sense of fragmentation of the display image of
  • the size of the light-emitting unit 100 can be further reduced to increase the number of light-emitting units 100 per unit area, so as to further improve the pixel density of the display panel, weaken the presence of the border area NA and the seam, thereby optimizing the display effect and improving the user experience.
  • the display panel is further divided, and the area of the display panel originally having 4 light-emitting units 100 is divided into an area having 12 light-emitting units 100.
  • the display panel includes a plurality of light-emitting units 100, each of which includes a plurality of sub-light-emitting units.
  • each of which includes a first sub-light-emitting unit 101, a second sub-light-emitting unit 102, and a third sub-light-emitting unit 103, wherein the light-emitting colors of the first sub-light-emitting unit 101, the second sub-light-emitting unit 102, and the third sub-light-emitting unit 103 are different.
  • the arrangement of the sub-light-emitting units in this embodiment is a Real RGB arrangement.
  • the light-emitting color of the first sub-light-emitting unit 101 is red
  • the light-emitting color of the second sub-light-emitting unit 102 is green
  • the light-emitting color of the third sub-light-emitting unit 103 is blue.
  • the light-emitting area of the blue sub-pixel is greater than the light-emitting area of the red/green sub-pixel.
  • the arrangement of sub-light-emitting units also includes Real RGB arrangement, pentile arrangement, diamond arrangement or Delta arrangement, but is not limited to these.
  • the display panel includes: a substrate 110, a pixel defining layer 320, a plurality of light emitting units 100, and a color filter layer 500.
  • the pixel defining layer 320 is located on one side of the substrate 110, and the pixel defining layer 320 includes a plurality of pixel openings 321 and a plurality of pixel defining units 322.
  • the plurality of light emitting units 100 are located in the plurality of pixel openings 321.
  • the color filter layer 500 is located on the side of the pixel defining layer 320 away from the substrate 110, and the color filter layer 500 includes a black matrix 510 and a plurality of filter units 520, the black matrix 510 is arranged corresponding to the plurality of pixel defining units 322, and the filter units 520 are arranged corresponding to the light emitting units 100.
  • the filter units 520 are located in the filter area, and the filter area includes a first filter area located in the first display area AA1 and a second filter area located in the second display area AA2, and the light transmission area of the first filter area is greater than the light transmission area of the second filter area.
  • the light transmission area of the first filter region of the color filter layer 500 is greater than the light transmission area of the second filter region.
  • the light-emitting area corresponding to the first filter area can transmit more light than the light-emitting area corresponding to the second filter area, and the light-emitting intensity of the light-emitting unit 100 in the first display area AA1 may be weaker than the light-emitting intensity of the light-emitting unit 100 in the second display area AA2. Further, the light-emitting life of the light-emitting unit 100 in the first display area AA1 may be extended, and the uniformity of the light-emitting life of the light-emitting unit 100 of the display panel is achieved, thereby improving the display quality of the display panel and enhancing the user experience.
  • the present embodiment may adopt a color filter on encapsulation (COE) technology, that is, after the AMOLED (Active-matrix organic light-emitting diode) is encapsulated, a color filter (CF) is plated on the side of the encapsulation layer 400 away from the substrate 110, and each pixel corresponds to a color filter of the color of the pixel, and the gaps between the color filters are separated by a black matrix 510 (BM).
  • COE color filter on encapsulation
  • the color filter in the COE technology can solve the problems of reflection and light transmission. Of the incident light from the outside, the unnecessary part is absorbed by the black matrix 510, and the necessary part is reflected by the color filter area.
  • the color filter has a high transmittance for the main wavelength of RGB, about 70% to 90%, which is much higher than that of the polarizer.
  • each light emitting unit 100 includes a red sub-light emitting unit, a blue sub-light emitting unit and a green sub-light emitting unit.
  • the color filter layer 500 also includes a red filter region, a blue filter region and a green filter region corresponding to the light emitting units 100 one by one.
  • the substrate 110 may be a rigid substrate or a flexible substrate, and the substrate 110 includes an insulating material such as glass, quartz, and polymer resin. Furthermore, the substrate 110 includes CPI (transparent polyimide, Colorless Polyimide), PET (Poly-Ethylene Terephthalate, Poly-Ethylene Terephthalate) or UTG (Ultra Thin Glass, Ultra Thin Glass).
  • CPI transparent polyimide, Colorless Polyimide
  • PET Poly-Ethylene Terephthalate, Poly-Ethylene Terephthalate
  • UTG Ultra Thin Glass, Ultra Thin Glass
  • a first electrode 310 is disposed on a side of the pixel defining layer 320 close to the substrate 110, and a second electrode 330 is disposed on a side of the pixel defining layer 320 away from the substrate 110.
  • the first electrode 310 is an anode, which may include ITO or IZO
  • the second electrode 330 is a cathode, which may include Mg/Ag.
  • an encapsulation layer 400 is disposed on one side of the color filter layer 500 close to the pixel defining layer 320 .
  • the encapsulation layer 400 includes at least one inorganic film layer for preventing oxygen and water from penetrating into the light emitting unit 100 in the pixel defining layer 320 .
  • the display panel further includes a filling layer 700 , and the filling layer 700 is located between the color film
  • the layer 500 is away from the side of the pixel defining layer 320, and the filling layer 700 is located in the first filter area.
  • the filter unit 520 is located in the second filter area.
  • the first display area AA1 in this embodiment adopts a color filter skip design, that is, the filter area of the first display area AA1 is not provided with a color filter (i.e., the filter unit 520), and the black matrix 510 is set as usual.
  • a filling layer 700 is directly set on the hollowed-out color filter area (i.e., the filter area), and the light transmittance of the filling layer 700 can be made greater than the light transmittance of the filter unit 520. It can be achieved that the light that can be transmitted through the light-emitting area corresponding to the first filter area is more than the light that can be transmitted through the light-emitting area corresponding to the second filter area, and the light-emitting intensity of the light-emitting unit 100 in the first display area AA1 can be weaker than the light-emitting intensity of the second display area AA2.
  • the light-emitting life of the light-emitting unit 100 in the first display area AA1 can be extended, and the light-emitting life uniformity of the light-emitting unit 100 of the display panel can be achieved, thereby improving the display quality of the display panel and enhancing the user experience.
  • the thickness of the filling layer 700 in the first display area AA1 is h2, which is greater than the thickness h3 of the filling layer 700 in the frame area NA, and greater than the thickness h1 of the filling layer 700 in the second display area AA2.
  • h2 the thickness of the filling layer 700 in the first display area AA1 is h2, which is greater than the thickness h3 of the filling layer 700 in the frame area NA, and greater than the thickness h1 of the filling layer 700 in the second display area AA2.
  • the filling layer 700 includes an organic insulating material.
  • the organic insulating material may include an imide polymer, a commercial polymer such as polymethyl methacrylate (PMMA) or polystyrene (PS), a polymer derivative having a phenolic group, an acryl polymer, an aryl ether polymer, an amide polymer, a fluorine polymer, a paraxylene polymer, or a vinyl alcohol polymer.
  • PMMA polymethyl methacrylate
  • PS polystyrene
  • the plurality of filter units 520 include a first filter unit 521 located in a first filter region and a second filter unit 522 located in a second filter region, and the size of the first filter unit 521 in a direction perpendicular to the display panel is smaller than the size of the second filter unit 522 in a direction perpendicular to the display panel.
  • the thickness of the first filter unit 521 is made smaller than the thickness of the second filter unit 522, so that the light transmittance of the first filter unit 521 can be greater than the light transmittance of the second filter unit 522.
  • the light intensity of the light emitting unit 100 of the first display area AA1 can be reduced, thereby extending the light emitting life of the light emitting unit 100 of the first display area AA1, achieving uniform light emitting life of the light emitting unit 100 of the display panel, improving the display quality of the display panel, and enhancing the user experience.
  • the light transmittance of the first filter unit 521 within a unit size may be the same as or different from the light transmittance of the second filter unit 522 within a unit size.
  • the light transmittance of the first filter unit 521 within a unit size is less than the light transmittance of the second filter unit 522 within a unit size, it is necessary to ensure that the thickness of the first filter unit 521 is much smaller than the thickness of the second filter unit 522.
  • the difference parameter between the thickness of the first filter unit 521 and the thickness of the second filter unit 522 is related to the ratio of the luminous area of the first display area AA1 per unit area/the luminous area of the second display area AA2 per unit area, and those skilled in the art can flexibly set it according to actual conditions.
  • the difference between the thickness of the first filter unit 521 and the thickness of the second filter unit 522 is p1
  • the filter unit 520 includes a first filter unit 521 located in the first filter area and a second filter unit 522 located in the second filter area, and the area of the first filter unit 521 on the side close to the pixel defining layer 320 is larger than the area of the second filter unit 522 on the side close to the pixel defining layer 320.
  • the area of the first filter unit 521 on the side close to the pixel defining layer 320 is larger, so that when external light is incident on the surface of the light-emitting unit 100, more light can be reflected, thereby improving the light transmittance of the first filter unit 521, and further flexibly adjusting the luminous intensity of the light-emitting unit 100 in the first display area AA1 to extend its life, compensate for the defect of reduced luminous area caused by the border area NA (non-luminous area) in the edge area, improve the uniformity of the luminous life of the light-emitting unit 100 of the display panel, improve the display quality of the display panel, and enhance the user experience.
  • the area of the first filter unit 521 close to the pixel defining layer 320 increases, the area of the corresponding adjacent black matrix 510 close to the pixel defining layer 320 may increase, decrease or remain unchanged, and the art may flexibly select according to actual conditions.
  • the area of the black matrix 510 increases, it is necessary to ensure that the light transmittance increased by the increase in the area of the filter unit 520 is greater than the light absorption rate increased by the increase in the area of the black matrix 510.
  • the black matrix 510 includes a first black matrix 511 located in the first display area AA1 and a second black matrix 512 located in the second display area AA2, and the area of the first black matrix 511 on the side close to the pixel defining layer 320 is smaller than the area of the second black matrix 512 on the side close to the pixel defining layer 320.
  • This embodiment reduces the area of the black matrix 510 on the side close to the pixel defining layer 320, thereby reducing the light absorption rate of the black matrix 510, indirectly increasing the light transmittance of the first filter area, thereby achieving flexible adjustment of the light intensity of the light-emitting unit 100 of the first display area AA1, extending the light-emitting life, compensating for the problem of reduced light-emitting area in the edge area, improving the uniformity of the light-emitting life of the light-emitting unit 100 of the display panel, and optimizing the application of display panels and spliced screens in the field of display technology.
  • the display area AA further includes a driving circuit layer 200 .
  • 200 is located on a side of the substrate 110 close to the pixel defining layer 320 , and the driving circuit layer 200 is electrically connected to the light emitting unit 100 .
  • the driving circuit layer 200 includes a plurality of pixel driving circuits 201 , and the pixel driving circuits 201 are electrically connected to the light emitting units 100 in a one-to-one correspondence.
  • the area where one pixel unit is located is set to include 12 small pixel units.
  • the 12 small pixel units are driven by 12 pixel driving circuits respectively, and the same data signal is written into the 12 small pixel units.
  • the driving circuit layer 200 includes a plurality of pixel driving circuits 201 , and the pixel driving circuits 201 are electrically connected to the light emitting units 100 in a one-to-many correspondence.
  • a region where one pixel unit is located is divided into 12 small pixel units, wherein the 12 small pixel units can be driven by the same pixel circuit to realize parallel connection.
  • the driving circuit layer 200 includes a plurality of pixel driving circuits 201 , and the pixel driving circuits 201 are electrically connected to the light emitting units 100 in a one-to-many correspondence.
  • the display panel further includes a first barrier layer 111 (barrier 1) and a second barrier layer 112 (barrier 2) sequentially stacked on the substrate 110
  • the driving circuit layer 200 includes a thin film transistor, which includes a first source electrode 211, a second source electrode 212, an active layer 216, a first drain electrode 213, a second drain electrode 214 connected sequentially, and a first gate electrode 215 and a second gate electrode 217 located on a side of the active layer 216 away from the substrate 110.
  • the driving circuit layer 200 further includes a first gate insulating layer 221, a second gate insulating layer 222, an interlayer dielectric layer 230 (ILD), a passivation layer 240 (PVX), a first planarization layer 251 (PLN1), and a second planarization layer 252 (PLN2) sequentially stacked on the substrate 110.
  • the border area NA includes: an edge luminous material defining area and an edge luminous material unit.
  • the edge luminous material defining area is located in the pixel defining layer 320, and is formed with a plurality of defining areas and defining grooves.
  • the edge luminous material unit is located in the defining groove.
  • the display effect is improved by sacrificing the space of edge pixels to form the border area NA while reducing the pixel size, which will have a certain impact on the manufacturing process.
  • the mask in the related art usually adopts a mold of a fixed shape to form a plurality of pixel units arranged in an array, in order to save the production cost of the mask, standardize the mask model, and simplify the manufacturing process, the present embodiment still retains the process of forming the "pixel defining layer 320" (edge luminous material defining area) in the border area NA, but the other film layers of the border area NA are still consistent with the border area NA in the related art, and the edge luminous material unit in the edge luminous material defining area of the border area NA is not additionally connected to the driving circuit to ensure that there is enough space in the border area NA to form the relevant packaging structure.
  • the limiting groove can prevent the luminescent materials inside and outside the packaging frame from being connected together, so as to achieve the effect of isolating the packaging water vapor.
  • a plurality of isolation columns 1002 are provided in the limiting area for isolating the luminescent material.
  • the frame area NA where the second planarization layer 252 is located is also provided with a plurality of V-shaped grooves 1001 to prevent the second planarization layers 252 from being connected to each other to avoid water vapor erosion.
  • the frame area NA in this embodiment is provided with a dam 600 to prevent the organic material in the planarization layer from flowing or leaking to the outside.
  • this embodiment can achieve preliminary blocking of the flow of organic materials by setting a V-shaped groove 1001, and can also reduce the height of the organic material film layer, and further combined with a dam 600 to effectively block the organic material from being exposed to or leaking to the outside of the display device, thereby simplifying the manufacturing process and saving packaging costs.
  • the dam 600 can be formed by an organic film such as acrylic resin, epoxy resin, phenolic resin, polyamide resin and polyimide resin.
  • V-grooves 1001 and isolation columns 1002 are alternately arranged, and the depth of the V-grooves 1001 is higher than the height of the isolation columns 1002 , so as to prevent the organic material in the second planarization layer 252 from flowing or leaking.
  • V-shaped grooves 1001 and isolation columns 1002 may be formed on both sides of the dam 600.
  • the distance from the first V-shaped groove 1001 closest to the dam 600 to the dam 600 is smaller than the distance from the first isolation column 1002 closest to the dam 600 to the dam 600.
  • the distance from the center line of the first V-shaped groove 1001 to the center line of the dam 600 is smaller than the distance from the center line of the first isolation column 1002 to the center line of the dam 600, thereby facilitating the V-shaped groove 1001 to prevent the organic material from flowing or leaking into the display area AA.
  • the light-emitting material of the light-emitting unit 100 and the second electrode 330 may also be filled into the V-groove 1001 , or the light-emitting material of the light-emitting unit 100 and the second electrode 330 may also be filled into the gap between the V-groove 1001 and the isolation column 1002 .
  • the orthographic projections of the filling layer 700, the black matrix 510, and the encapsulation layer 400 on the substrate 110 may at least partially overlap with the orthographic projections of the V-shaped groove 1001 and the isolation column 1002 on the substrate 110, which is conducive to achieving the planarization of the frame area NA.
  • the filling layer 700 and the black matrix 510 both terminate at the side of the dam portion 600 close to the display area AA1 and directly contact the dam portion 600, which is conducive to forming a strict encapsulation structure.
  • the length of the black matrix 510 in the frame area NA is greater than the length of the black matrix in the first display area AA1 and the second display area AA2.
  • the black matrix length in the first display area AA1 and the second display area AA2 is 3 to 5 times, which is beneficial to block the light in the frame area NA and is beneficial to the flattening of the frame area NA.
  • the spacing between the frame area NA and the adjacent light-emitting units 100 located in the first display area AA1 is equal to the spacing between the adjacent light-emitting units 100 in the first display area AA1.
  • the center spacing between the frame area NA and the adjacent light-emitting units 100 located in the first display area AA1 is equal to the center spacing between the adjacent light-emitting units 100 in the first display area AA1.
  • the border area NA when the border area NA is provided with an edge luminous material unit, which is equivalent to the existence of "pixels" in the edge area, when the original large-size pixels are divided into small-size pixels, the center distance between the border area NA and the adjacent light-emitting units 100 is equal to the center distance between the adjacent light-emitting units 100 in the first display area AA1.
  • a plurality of display panels form a spliced screen, it can be regarded as using the pixel area of the edge area to form the border area NA, which can be further regarded as realizing an equal pitch design between the pixels of the plurality of display panels, thereby improving the display fragmentation caused by the low screen-to-body ratio between the spliced screens in the related art.
  • the light emitting unit 100 includes a plurality of sub-light emitting units, and the sub-light emitting units of the first display area AA1 and the sub-light emitting units of the second display area AA2 are arranged in the same manner. Regular pixel arrangement can be achieved to fully utilize space.
  • the embodiment of the present application provides a spliced screen, including multiple display panels as provided in the above embodiment, wherein the frame areas NA of the multiple display panels are spliced with each other.
  • the spliced screen has all the features and advantages of the above display panels, which will not be described in detail here.
  • an embodiment of the present application provides a display device, including a display panel or a spliced screen as provided in the aforementioned embodiment.
  • the spliced screen has all the features and advantages of the aforementioned display panel or spliced screen, which will not be repeated here.
  • the display device can be any device that displays whether it is moving (e.g., video) or fixed (e.g., still image) and whether it is text or image. More specifically, it is contemplated that the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers/navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controls and/or displays, displays of camera views (e.g., displays of rear-view cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.
  • PDAs personal data assistants
  • GPS receivers/navigators cameras
  • MP4 video players camcorders
  • orientation or position relationship indicated by terms such as “center”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientation or position relationship shown in the drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, “plurality” means two or more.

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Abstract

一种显示面板、拼接屏和显示装置。显示面板包括显示区（AA）和边框区（NA）。显示区（AA）包括与边框区（NA）相邻的第一显示区（AA1），以及位于第一显示区（AA1）远离边框区（NA）一侧的第二显示区（AA2）；在单位面积内，第一显示区（AA1）的透光面积大于第二显示区（AA2）的透光面积。

Description

显示面板、拼接屏和显示装置 技术领域
本申请涉及显示技术领域，具体涉及一种显示面板、拼接屏和显示装置。
背景技术
随着电子显示产品的发展，消费者对显示屏的屏占比要求越来越高，现如今的显示面板受到技术上的限制，在显示面板的边缘区域仍会形成非显示边框区域，在视觉效果上仍然有待提升。一方面，对于单个独立的显示屏而言，边框区域的存在会降低显示屏的屏占比，视觉效果上仍有限制，在一定程度上影响用户体验感。另一方面，随着室外广告和室内教育等行业发展，大尺寸屏幕显示成为显示行业的一个重要分支。
发明内容
本申请提出一种显示面板、拼接屏和显示装置。
根据本申请实施例的第一方面，提供一种显示面板，该显示面板包括显示区和边框区。所述显示区包括与所述边框区相邻的第一显示区，以及位于所述第一显示区远离所述边框区一侧的第二显示区；在单位面积内，所述第一显示区的透光面积大于所述第二显示区的透光面积。
在一个实施例中，所述显示面板包括：基板、像素限定层、多个发光单元以及彩膜层。其中，像素限定层位于所述基板的一侧，所述像素限定层包括多个像素开口和多个像素限定单元。多个发光单元位于所述多个像素开口内。彩膜层位于所述像素限定层远离所述基板的一侧，所述彩膜层包括黑矩阵及多个滤光单元，所述黑矩阵与所述多个像素限定单元对应设置，所述多个滤光单元与所述多个发光单元对应设置。所述多个滤光单元位于滤光区，所述滤光区包括位于所述第一显示区的第一滤光区和位于所述第二显示区的第二滤光区，所述第一滤光区的透光面积大于所述第二滤光区的透光面积。
在一个实施例中，所述显示面板还包括填充层，填充层位于所述彩膜层远离所述像素限定层的一侧。所述填充层至少部分位于所述第一滤光区。所述多个滤光单元位于所述第二滤光区。
在一个实施例中，所述多个滤光单元包括位于所述第一滤光区的第一滤光单元及位于所述第二滤光区的第二滤光单元，其中，所述第一滤光单元在垂直于所述显示面板方向上的尺寸小于所述第二滤光单元在垂直于所述显示面板方向上的尺寸。
在一个实施例中，所述多个滤光单元包括位于所述第一滤光区的第一滤光单元及位于所述第二滤光区的第二滤光单元，其中，所述第一滤光单元靠近所述像素限定层的一侧的面积大于所述第二滤光单元靠近所述像素限定层的一侧的面积。
在一个实施例中，所述黑矩阵包括位于所述第一显示区的第一黑矩阵及位于所述第二显示区的第二黑矩阵，其中，所述第一黑矩阵靠近所述像素限定层的一侧的面积小于所述第二黑矩阵靠近所述像素限定层的一侧的面积。
在一个实施例中，所述显示面板还包括位于所述显示区内的驱动电路层。驱动电路层位于所述基板靠近所述像素限定层的一侧，所述驱动电路层与所述多个发光单元电连接。
在一个实施例中，所述驱动电路层包括多个像素驱动电路，其中，所述多个像素驱动电路与所述多个发光单元一一对应电连接。
在一个实施例中，所述驱动电路层包括多个像素驱动电路，其中，所述多个像素驱动电路与所述多个发光单元一对多对应电连接。
在一个实施例中，所述驱动电路层包括多个像素驱动电路，其中，所述多个像素驱动电路与所述多个发光单元多对一对应电连接。
在一个实施例中，所述边框区包括：边缘发光材料限定区和边缘发光材料单元。边缘发光材料限定区位于所述像素限定层，形成有多个限定区和限定槽。边缘发光材料单元位于所述限定槽内。
在一个实施例中，所述边框区与相邻的位于第一显示区的发光单元之间的间距等于所述第一显示区内相邻的发光单元之间的间距。
在一个实施例中，所述发光单元包括多个子发光单元，所述第一显示区的子发光单元和所述第二显示区的子发光单元的排布方式相同。
在一个实施例中，所述边框区包括V形槽和隔离柱，所述V形槽和所述隔离柱交替排列，且所述V形槽的深度高于所述隔离柱的高度。
在一个实施例中，所述边框区包括一个坝部，其中，在所述坝部靠近所述显示区的一侧，离所述坝部最近的V形槽到所述坝部的距离小于离所述坝部最近的隔离柱到所述坝部的距离。
在一个实施例中，所述填充层和所述黑矩阵都截止于所述坝部靠近所述显示区的一 侧，且直接与所述坝部接触。
在一个实施例中，在所述边框区中，所述黑矩阵在所述基板上的正投影与所述V形槽和所述隔离柱在所述基板上的正投影至少部分重叠。
在一个实施例中，所述边框区中的黑矩阵的长度大于所述第一显示区和所述第二显示区中的黑矩阵长度。
根据本申请实施例的第二方面，还提供一种拼接屏。包括如前述实施例提供的多个显示面板，多个所述显示面板的所述边框区彼此拼接。
根据本申请实施例的第三方面，提供一种显示装置。包括如前述实施例提供的显示面板或拼接屏。
本申请附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
图1是相关技术中的一种拼接屏的发光单元的排布示意图。
图2是本申请实施例提供的一种显示面板的发光单元的排布示意图。
图3是本申请实施例提供的图2中一种沿虚线AA’得到的显示面板的部分膜层的剖面图。
图4是本申请实施例提供的图2中另一种沿虚线AA’得到的显示面板的部分膜层的剖面图。
图5是本申请实施例提供的图2中又一种沿虚线AA’得到的显示面板的部分膜层的剖面图。
图6是本申请实施例提供的图2中再一种沿虚线AA’得到的显示面板的部分膜层的剖面图。
图7是本申请实施例提供的一种显示面板的膜层示意图。
图中：
100-发光单元；101-第一子发光单元；102-第二子发光单元；103-第三子发光单元；
AA-显示区；AA1-第一显示区；AA2-第二显示区；NA-边框区；110-基板；111-第一屏障层；112-第二屏障层；200-驱动电路层；201-像素驱动电路；211-第一源极；212-第二源极；213-第一漏极；214-第二漏极；215-第一栅极；216-有源层；217-第二栅极；221-第一栅极绝缘层；222-第二栅极绝缘层；230-层间介质层；240-钝化层；251-第一平坦化层；252-第二平坦化层；310-第一电极；320-像素限定层；321-像素开口；322-像素限定单元；330-第二电极；400-封装层；500-彩膜层；510-黑矩阵；511-第一黑矩阵；512-第二黑矩阵；520-滤光单元；521-第一滤光单元；522-第二滤光单元；600-坝部；700-填充层；1001-V形槽；1002-隔离柱。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施例并不代表与本申请相一致的所有实施例。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。
在本申请使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。在本申请和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
随着时代的发展，消费者对电子显示产品的显示屏的追求越来越高。单独的显示屏存在屏占比无法达到100％的问题。拼接屏的边框区和拼缝会让显示画面在视觉效果上存在强烈割裂感。因此OLED(Organic Light-Emitting Diode，有机发光二极管)可以成为该领域的重要发展方向。
拼接屏由多个独立的显示屏拼接而成，两款拼接屏之间存在拼缝D(如图1所示)。拼缝的存在使得拼接位置的像素间距(pixel pitch)与中部区域不一致，拼缝处的像素间距更大，导致显示时存在画面割裂感。拼缝的尺寸直接影响到显示效果，如LCD(Liquid Crystal Display，液晶显示屏)常规窄拼缝较大，拼缝区域无法显示内容，会造成显示割裂感，因此需要减小拼缝尺寸。为了减小拼缝尺寸，产品可采用辅助阴极技术将VSS地线分布于AA区(Active Area，可触控区域)中间，从而改善VSS地线对边框的影响。但是封装边框在现有OLED技术下无法消除只能减小，因此拼缝是一直存在的。然而，OLED的像素结构较大，结合OLED的大开口率设计和精细化掩模版的限制，导致拼接处的边框区域不发光并且间隙(space)更大，从而无法实现改善显示效果的目的。
本申请提供的显示面板、拼接屏和显示装置，旨在解决相关技术的如上技术问题。
下面结合附图，对本申请实施例中的显示面板、拼接屏和显示装置进行详细说明。在不冲突的情况下，下述的实施例中的特征可以相互补充或相互组合。
本申请实施例提供了一种显示面板，如图2所示，包括显示区AA和至少部分围绕显示区AA的边框区NA。显示区AA包括与边框区NA相邻的第一显示区AA1，以及位于第一显示区AA1远离边框区NA一侧的第二显示区AA2。在单位面积内，第一显示区AA1的透光面积大于第二显示区AA2的透光面积。
本实施例中，显示面板的单位面积内，第一显示区AA1的透光面积大于第二显示区AA2的透光面积。示例性的，一方面，可将第一显示区AA1和与第一显示区AA1相邻的边框区NA视为一个整体作为“边缘区域”，则边框区NA可视为“边缘区域”内的不发光区域。如图2所示，当发光单元阵列排布于显示面板上时，单位面积内边缘区域(第一显示区AA1和边框区NA)的发光面积小于单位面积内第二显示区AA2的发光面积，边缘区域的不发光区域可用于形成边框区NA。例如：如图2所示，以单位面积为3*4发光单元100为例(水平方向3个发光单元100，垂直方向4个发光单元100)，边缘区域(第一显示区AA1和边框区NA)在单位面积为3*4发光单元100的区域内，即边缘区域在包括SAA1(水平方向2个发光单元100，垂直方向4个发光单元100，2*4发光单元100可用于发光面积)和SNA(水平方向1个发光单元100，垂直方向4个发光单元100，1*4发光单元不用于发光面积)的区域内，其发光面积为2*4发光单元100；第二显示区AA2在单位面积为3*4发光单元100的区域内，发光面积包括SAA2，其有3*4发光单元100(水平方向3个发光单元100，垂直方向4个发光单元100，3*4发光单元100可用于发光面积)。
示例性的，发光面积可以是指发光单元100或子发光单元在基板的正投影面积，透光面积可以是指发光单元100或子发光单元的控制出光的部分在基板的正投影面积，例如发光单元100或子发光单元的滤光区在基板的正投影面积。单位面积可以是多个发光单元100或子发光单元，也可以是1个发光单元100或1个子发光单元。
本申请通过牺牲相关技术中与边框相邻的发光单元的发光区域用来形成边框区NA，可以实现，增大独立显示屏的屏占比或者改善拼接屏的拼缝区域导致的显示画面割裂感。但同时，当单位面积内边缘区域的发光面积小于第二显示区AA2的发光面积时，会导致单位面积内边缘区域的发光单元与第二显示区AA2的发光单元的寿命产生差异，从而造成显示屏各个区域的发光单元的寿命不均匀，从而会影响屏幕显示及用户体验感。 因此通过增大第一显示区AA1的透光面积，令第一显示区AA1的透光面积大于第二显示区AA2的透光面积，同时在工作状态下调节使第一显示区AA1的发光单元的发光强度小于第二显示区AA2的发光强度，可以实现在保证发光单元的显示亮度一致的情况下，延长第一显示区AA1的发光单元的发光寿命，从而实现单位面积内边缘区域的发光单元的寿命与第二显示区AA2的发光单元的寿命相同，保证了显示面板的显示品质，同时在视觉上削弱了边框区NA对显示面板显示效果的影响，增大了视觉效果上的屏占比，削弱了拼接屏的显示画面割裂感，提升了用户体验感。
在一些实施例中，可以进一步减小发光单元100的尺寸，使单位面积内发光单元100的数量增多，以进一步提升显示面板的像素密度，弱化边框区NA和拼缝的存在感，从而优化显示效果，提升用户体验感。示例性地，如图1～2所示，对显示面板进一步分割，将显示面板中原来设有4个发光单元100的区域划分为设有12个发光单元100。
在一些实施例中，如图1～2所示，显示面板包括多个发光单元100，每个发光单元100包括多个子发光单元，示例性地，每个发光单元100包括第一子发光单元101、第二子发光单元102和第三子发光单元103，其中第一子发光单元101、第二子发光单元102和第三子发光单元103的发光颜色各不相同。示例性地，本实施例中的子发光单元的排布方式为Real RGB排列方式。第一子发光单元101的发光颜色为红色，第二子发光单元102的发光颜色为绿色，第三子发光单元103的发光颜色为蓝色。其中，蓝色子像素的发光面积大于红色/绿色子像素的发光面积，通过增大蓝色子像素的发光面积的方式增大蓝色子像素的发光寿命，提升显示面板显示效果的均一性。
需要说明的是，子发光单元的排布方式还包括Real RGB排列方式、pentile排列、钻石排列或Delta排列，不限于此。
在一些实施例中，如图3～5所示，显示面板包括：基板110、像素限定层320、多个发光单元100以及彩膜层500。其中，像素限定层320位于基板110的一侧，像素限定层320包括多个像素开口321和多个像素限定单元322。多个发光单元100位于多个像素开口321内。彩膜层500位于像素限定层320远离基板110的一侧，彩膜层500包括黑矩阵510及多个滤光单元520，黑矩阵510与多个像素限定单元322对应设置，滤光单元520与发光单元100对应设置。滤光单元520位于滤光区，滤光区包括位于第一显示区AA1的第一滤光区和位于第二显示区AA2的第二滤光区，第一滤光区的透光面积大于第二滤光区的透光面积。
本实施例中的彩膜层500的第一滤光区的透光面积大于第二滤光区的透光面积。即 彩膜层500的第一滤光区的光透过率大于第二滤光区的光透过率(光透过率，可以指光通量与其入射光通量的百分率，例如，可以是发光单元100中穿过滤光区的光通量与其入射的光通量的百分率。在一些实施例中，例如光穿过的介质相同，可以是光透过率＝透光面积/发光面积)。可以实现，第一滤光区对应的发光区可透过的光线比第二滤光区对应的发光区可透过的光线多，则第一显示区AA1的发光单元100的发光强度可弱于第二显示区AA2的发光强度，进一步地，可延长第一显示区AA1的发光单元100的发光寿命，实现显示面板的发光单元100的发光寿命均一性，提高显示面板的显示品质，提升用户体验感。
需要说明的是，本实施例可采用无偏光片(pol-less)技术(color filter on encapsulation，COE)，即在AMOLED(Active-matrix organic light-emitting diode，有源矩阵有机发光二极管)封装完成之后，再在封装层400远离基板110的一侧镀上一层彩色滤光片(CF，Color Filter)，每个像素上面对应这个像素颜色的彩色滤光片，彩色滤光片的间隙通过黑矩阵510(BM，Black Matrix)隔开。COE技术中的彩色滤光片可以解决反光和透光问题。外界入射光线中，不需要的部分被黑矩阵510吸收，需要的部分通过彩膜区反射出来。彩膜对于RGB的主波长透过率较高，约为70％～90％，比偏光片高上许多。
在一些实施例中，每个发光单元100包括红色子发光单元、蓝色子发光单元和绿色子发光单元。彩膜层500也包括与发光单元100之间一一对应的红色滤光区、蓝色滤光区和绿色滤光区。
需要说明的是，基板110可以是刚性基板或柔性基板，基板110包括绝缘材料，诸如玻璃、石英和聚合物树脂。更进一步的，基板110包括CPI(透明聚酰亚胺，Colorless Polyimide)、PET(聚乙烯对苯二甲酸酯，Poly-Ethylene Terephthalate)或UTG(超薄玻璃，Ultra Thin Glass)。
在一些实施例中，如图7所示，像素限定层320靠近基板110的一侧设有第一电极310，像素限定层320远离基板110的一侧设有第二电极330。示例性地，第一电极310为阳极，阳极可包括ITO或IZO，第二电极330为阴极，阴极可包括Mg/Ag。
在一些实施例中，如图3～5所示，彩膜层500靠近像素限定层320的一侧设有封装层400，封装层400包括至少一个无机膜层，用于防止氧气和水渗透到像素限定层320中的发光单元100中。
在一些实施例中，如图3所示，显示面板还包括填充层700，填充层700位于彩膜 层500远离像素限定层320的一侧，填充层700位于第一滤光区。滤光单元520位于第二滤光区。本实施例中的第一显示区AA1采用彩膜省略(skip)设计，即第一显示区AA1的滤光区不设彩膜(即滤光单元520)，黑矩阵510照常设置。当镀完彩色滤光片之后，对于被挖空的彩膜区域(即滤光区)，直接在其上面设置一层填充层700，同时可令填充层700的光透过率大于滤光单元520的光透过率。可以实现，第一滤光区对应的发光区可透过的光线比第二滤光区对应的发光区可透过的光线多，则第一显示区AA1的发光单元100的发光强度可弱于第二显示区AA2的发光强度，进一步地，可延长第一显示区AA1的发光单元100的发光寿命，实现显示面板的发光单元100的发光寿命均一性，提高显示面板的显示品质，提升用户体验感。
在一些实施例中，如图3所示，填充层700位于第一显示区AA1的厚度为h2，h2大于填充层700位于边框区NA的厚度h3，且大于填充层700位于第二显示区AA2的厚度h1。如此设计，有利于平衡光线在第一显示区AA1和在第一显示区AA2的透光率。
在一些实施例中，填充层700包括有机绝缘材料。有机绝缘材料可以包括酰亚胺类聚合物、商用聚合物(诸如聚甲基丙烯酸甲酯(PMMA)或聚苯乙烯(PS))、具有酚类基团的聚合物衍生物、丙烯酰类聚合物、芳基醚类聚合物、酰胺类聚合物、氟类聚合物、对二甲苯类聚合物或乙烯醇类聚合物。
在一些实施例中，如图4所示，多个滤光单元520包括位于第一滤光区的第一滤光单元521及位于第二滤光区的第二滤光单元522，第一滤光单元521在垂直于显示面板方向上的尺寸小于第二滤光单元522在垂直于显示面板方向上的尺寸。
在本实施例中，第一滤光单元521在单位尺寸内(例如单位面积)的光透过率与第二滤光单元522在单位尺寸内的光透光率相同时，令第一滤光单元521的厚度小于第二滤光单元522的厚度，可实现第一滤光单元521的光透过率大于第二滤光单元522的光透过率。进而还可通过调节与对应的发光单元100电连接的驱动电流，减小第一显示区AA1的发光单元100的发光强度，进而延长第一显示区AA1的发光单元100的发光寿命，实现显示面板的发光单元100的发光寿命均一性，提高显示面板的显示品质，提升用户体验感。
需要说明的是，第一滤光单元521在单位尺寸内的光透过率与第二滤光单元522在单位尺寸内的光透光率可相同或不相同，当第一滤光单元521在单位尺寸内的光透过率小于第二滤光单元522在单位尺寸内的光透光率时，需要保证第一滤光单元521的厚度远小于第二滤光单元522的厚度。
进一步地，第一滤光单元521的厚度与第二滤光单元522的厚度之间的差异值参数与单位面积内第一显示区AA1发光面积/单位面积内第二显示区AA2发光面积的比值相关，本领域技术人员可根据实际情况灵活设定。例如：第一滤光单元521的厚度与第二滤光单元522的厚度之间的差异值为p1，单位面积内边缘区域(包括第一显示区AA1和边框区NA)/单位面积内第二显示区AA2发光面积的比值为S1，其中K＝p1/S1，K＝0.95～1.05。可实现保证第一显示区AA1和第二显示区AA2之间的亮度差异较小，保证更好的显示效果。
在一些实施例中，如图5所示，滤光单元520包括位于第一滤光区的第一滤光单元521及位于第二滤光区的第二滤光单元522，第一滤光单元521靠近像素限定层320的一侧的面积大于第二滤光单元522靠近像素限定层320的一侧的面积。
本实施例中第一滤光单元521靠近像素限定层320的一侧的面积较大，则可以实现，当外界光线入射至发光单元100表面时，可反射的光线增多，进而提升第一滤光单元521的光透过率，进一步的可灵活调节第一显示区AA1的发光单元100的发光强度，延长其寿命，补偿边缘区域的边框区NA(非发光区域)造成的发光面积减小的缺陷，提升显示面板的发光单元100的发光寿命均一性，提高显示面板的显示品质，提升用户体验感。
需要说明的是，当第一滤光单元521靠近像素限定层320的一侧的面积增大时，对应的相邻的黑矩阵510靠近像素限定层320的一侧的面积可以增大、变小或不变，本领域可根据实际情况灵活选择。当黑矩阵510的面积增大时，需要保证滤光单元520的面积增大后增加的光透过率大于黑矩阵510面积增大后增加的光吸收率。
在一些实施例中，如图5所示，黑矩阵510包括位于第一显示区AA1的第一黑矩阵511及位于第二显示区AA2的第二黑矩阵512，第一黑矩阵511靠近像素限定层320的一侧的面积小于第二黑矩阵512靠近像素限定层320的一侧的面积。
本实施例减小黑矩阵510在靠近像素限定层320一侧的面积，从而减小黑矩阵510的光吸收率，间接实现增大第一滤光区的光透过率，从而实现灵活调整第一显示区AA1的发光单元100的发光强度，延长发光寿命，补偿因边缘区域发光面积减小的问题，提升显示面板的发光单元100的发光寿命均一性，优化显示面板及拼接屏等在显示技术领域的应用。
在一些实施例中，如图3～6所示，显示区AA还包括驱动电路层200。驱动电路层 200位于基板110靠近像素限定层320的一侧，驱动电路层200与发光单元100电连接。
在一些实施例中，驱动电路层200包括多个像素驱动电路201，像素驱动电路201与发光单元100一一对应电连接。
示例性地，如图2所示，本实施例采用将1个像素单元所在的区域设置为包括12个小像素单元的方式，则12个小像素单元分别采用12个像素驱动电路驱动，12个小像素单元写入同一数据信号。
在一些实施例中，驱动电路层200包括多个像素驱动电路201，像素驱动电路201与发光单元100一对多对应电连接。
示例性地，本实施例中采用将1个像素单元所在的区域划分为12个小像素单元的方式，其中12个小像素单元可采用同一个像素电路驱动实现并联连接。
在一些实施例中，驱动电路层200包括多个像素驱动电路201，像素驱动电路201与发光单元100多对一对应电连接。
在一些实施例中，如图7所示，显示面板还包括依次层叠于基板110上的第一屏障层111(barrier 1)和第二屏障层112(barrier 2)，驱动电路层200包括薄膜晶体管，薄膜晶体管包括依次连接的第一源极211、第二源极212、有源层216、第一漏极213、第二漏极214，以及位于有源层216远离基板110的一侧的第一栅极215和第二栅极217。驱动电路层200还包括依次层叠于基板110上的第一栅极绝缘层221、第二栅极绝缘层222、层间介质层230(ILD)、钝化层240(PVX)、第一平坦化层251(PLN1)以及第二平坦化层252(PLN2)。
在一些实施例中，如图7所示，边框区NA包括：边缘发光材料限定区和边缘发光材料单元。边缘发光材料限定区位于像素限定层320，形成有多个限定区和限定槽。边缘发光材料单元位于限定槽内。
在前述实施例中，通过采用牺牲掉边缘像素的空间以形成边框区NA，同时减小像素尺寸的方法以提升显示效果，会对制造工艺产生一定的影响。由于相关技术中掩模版通常是采用固定形状的模具以形成多个阵列排布的像素单元，因此为节约掩模版的制作成本，单一化掩模版的型号，简化制造工艺，本实施例仍然保留在边框区NA形成“像素限定层320”(边缘发光材料限定区)的工艺，但是边框区NA的其他膜层仍然与相关技术中的边框区NA一致，边框区NA的边缘发光材料限定区内的边缘发光材料单元不另外连接驱动电路，以保证边框区NA有足够的空间以形成相关封装结构。本实施例中 的限定槽可避免封装边框内外的发光材料连在一起，以实现隔离封装水汽效果。示例性地，限定区设有多个隔离柱1002，用于隔离发光材料。
在一些实施例中，如图7所示，第二平坦化层252所在的边框区NA还设有多个V形槽1001，避免第二平坦化层252之间相连接，以避免水汽侵蚀。同时，本实施例中的边框区NA设有一个坝部600，以阻挡平坦化层中的有机材料流动或渗漏到外侧。相比于相关技术中通常采用两个坝部(DAM)以有效防止有机材料暴露于或渗漏到显示装置的外部，本实施例通过设置V形槽1001可实现初步阻挡有机材料的流动，同时也可降低有机材料膜层的高度，进一步结合一个坝部600即可实现有效阻挡有机材料暴露于或渗漏到显示装置的外部，从而简化了制造工艺和节约了封装成本。需要说明的是，坝部600可以由诸如丙烯酸树脂、环氧树脂、酚醛树脂、聚酰胺树脂和聚酰亚胺树脂的有机膜形成。
在一些实施例中，如图7所示，边框区NA中，V形槽1001和隔离柱1002交替排列，且V形槽1001的深度，高于隔离柱1002的高度，以便阻挡第二平坦化层252中的有机材料流动或渗漏。
在一些实施例中，如图7所示，边框区NA中，在坝部600的两侧，可均形成V形槽1001和隔离柱1002。在坝部600靠近显示区AA的一侧，离坝部600最近的第一V形槽1001到坝部600的距离小于离坝部600最近的第一隔离柱1002到坝部600的距离。例如，第一V形槽1001的中心线到坝部600的中心线的距离小于第一隔离柱1002的中心线到坝部600的中心线的距离，从而有利于通过V形槽1001来阻止有机材料流动或渗漏到显示区AA。
在一些实施例中，如图7所示，边框区NA中，发光单元100的发光材料和第二电极330也可以填充到V形槽1001中，或者发光单元100的发光材料和第二电极330也可以填充到V形槽1001和隔离柱1002之间的间隙。
在一些实施例中，如图7所示，边框区NA中，填充层700、黑矩阵510、封装层400在基板110上的正投影可均与V形槽1001和隔离柱1002在基板110上的正投影至少部分重叠，有利于实现边框区NA的平坦化。填充层700和黑矩阵510都截止于坝部600靠近显示区AA1的一侧，且直接与坝部600接触，有利于形成严密的封装结构。
在一些实施例中，如图7所示，边框区NA中的黑矩阵510的长度大于第一显示区AA1和第二显示区AA2中的黑矩阵长度。例如：边框区NA中的黑矩阵510的长度是 第一显示区AA1和第二显示区AA2中的黑矩阵长度的3～5倍，有利于挡住边框区NA中的光线，以及有利于边框区NA的平坦化。在一些实施例中，边框区NA与相邻的位于第一显示区AA1的发光单元100之间的间距等于第一显示区AA1内相邻的发光单元100之间的间距。在一些实施例中，边框区NA与相邻的位于第一显示区AA1的发光单元100之间的中心间距等于第一显示区AA1内相邻的发光单元100之间的中心间距。
结合前述实施例，当边框区NA设有边缘发光材料单元，相当于边缘区也存在“像素”，则当原先的大尺寸像素分割为小尺寸像素时，边框区NA和相邻发光单元100之间的中心间距等于第一显示区AA1内相邻的发光单元100之间的中心间距时，可实现，当有多个显示面板形成拼接屏时，可视为将边缘区域的像素区用于形成边框区NA，则可进一步视为实现多个显示面板的像素之间形成等间距(pitch)设计，从而可以改善相关技术中的拼接屏之间由于屏占比不高导致的显示割裂感。
在一些实施例中，发光单元100包括多个子发光单元，第一显示区AA1的子发光单元和第二显示区AA2的子发光单元的排布方式相同。可实现像素规则排布以充分利用空间。
基于同一发明构思，本申请实施例提供了一种拼接屏。包括如前述实施例提供的多个显示面板，多个显示面板的边框区NA彼此拼接。由此，该拼接屏具备前述的显示面板的全部特征以及优点，在此不再赘述。
基于同一发明构思，本申请实施例提供了一种显示装置，包括如前述实施例提供的显示面板或拼接屏，由此，该拼接屏具备前述的显示面板或拼接屏的全部特征以及优点，在此不再赘述。
需要说明的是，该显示装置可以是显示不论运动(例如，视频)还是固定(例如，静止图像)的且不论文字还是图像的任何装置。更明确地说，预期实施例可实施在多种电子装置中或与多种电子装置关联，多种电子装置例如(但不限于)移动电话、无线装置、个人数据助理(PDA)、手持式或便携式计算机、GPS接收器/导航器、相机、MP4视频播放器、摄像机、游戏控制台、手表、时钟、计算器、电视监视器、平板显示器、计算机监视器、汽车显示器(例如，里程表显示器等)、导航仪、座舱控制器和/或显示器、相机视图的显示器(例如，车辆中后视相机的显示器)、电子相片、电子广告牌或指示牌、投影仪、建筑结构、包装和美学结构(例如，对于一件珠宝的图像的显示器)等。
本申请的上述实施例，在不产生冲突的情况下，可互为补充。
需要指出的是，在附图中，为了图示的清晰可能夸大了层和区域的尺寸。而且可以理解，当元件或层被称为在另一元件或层“上”时，它可以直接在其他元件上，或者可以存在中间的层。另外，可以理解，当元件或层被称为在另一元件或层“下”时，它可以直接在其他元件下，或者可以存在一个以上的中间的层或元件。另外，还可以理解，当层或元件被称为在两层或两个元件“之间”时，它可以为两层或两个元件之间唯一的层，或还可以存在一个以上的中间层或元件。通篇相似的参考标记指示相似的元件。
术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本申请的真正范围和精神由权利要求指出。
应当理解的是，本申请并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求来限制。

Claims (20)

  1. 一种显示面板，包括显示区和边框区，其特征在于，所述显示区包括与所述边框区相邻的第一显示区，以及位于所述第一显示区远离所述边框区一侧的第二显示区；
    在单位面积内，所述第一显示区的透光面积大于所述第二显示区的透光面积。
  2. 根据权利要求1所述的显示面板，其特征在于，所述显示面板包括：
    基板；
    像素限定层，位于所述基板的一侧，所述像素限定层包括多个像素开口和多个像素限定单元；
    多个发光单元，位于所述多个像素开口内；
    彩膜层，位于所述像素限定层远离所述基板的一侧，所述彩膜层包括：
    黑矩阵，所述黑矩阵与所述多个像素限定单元对应设置，及
    多个滤光单元，所述多个滤光单元与所述多个发光单元对应设置；所述多个滤光单元位于滤光区，所述滤光区包括位于所述第一显示区的第一滤光区和位于所述第二显示区的第二滤光区，所述第一滤光区的透光面积大于所述第二滤光区的透光面积。
  3. 根据权利要求2所述的显示面板，其特征在于，所述显示面板还包括：
    填充层，位于所述彩膜层远离所述像素限定层的一侧，所述填充层至少部分位于所述第一滤光区；所述多个滤光单元位于所述第二滤光区。
  4. 根据权利要求2所述的显示面板，其特征在于，
    所述多个滤光单元包括位于所述第一滤光区的第一滤光单元及位于所述第二滤光区的第二滤光单元，其中，所述第一滤光单元在垂直于所述显示面板方向上的尺寸小于所述第二滤光单元在垂直于所述显示面板方向上的尺寸。
  5. 根据权利要求2所述的显示面板，其特征在于，
    所述多个滤光单元包括位于所述第一滤光区的第一滤光单元及位于所述第二滤光区的第二滤光单元，其中，所述第一滤光单元靠近所述像素限定层的一侧的面积大于所述第二滤光单元靠近所述像素限定层的一侧的面积。
  6. 根据权利要求2所述的显示面板，其特征在于，
    所述黑矩阵包括位于所述第一显示区的第一黑矩阵及位于所述第二显示区的第二黑矩阵，其中，所述第一黑矩阵靠近所述像素限定层的一侧的面积小于所述第二黑矩阵靠近所述像素限定层的一侧的面积。
  7. 根据权利要求2所述的显示面板，其特征在于，所述显示面板还包括：
    位于所述显示区内的驱动电路层，其中，所述驱动电路层位于所述基板靠近所述像 素限定层的一侧，所述驱动电路层与所述多个发光单元电连接。
  8. 根据权利要求7所述的显示面板，其特征在于，所述驱动电路层包括多个像素驱动电路，其中，所述多个像素驱动电路与所述多个发光单元一一对应电连接。
  9. 根据权利要求7所述的显示面板，其特征在于，所述驱动电路层包括多个像素驱动电路，其中，所述多个像素驱动电路与所述多个发光单元一对多对应电连接。
  10. 根据权利要求7所述的显示面板，其特征在于，所述驱动电路层包括多个像素驱动电路，其中，所述多个像素驱动电路与所述多个发光单元多对一对应电连接。
  11. 根据权利要求2所述的显示面板，其特征在于，所述边框区包括：
    边缘发光材料限定区，位于所述像素限定层，形成有多个限定区和限定槽；
    边缘发光材料单元，位于所述限定槽内。
  12. 根据权利要求2所述的显示面板，其特征在于，所述边框区与相邻的位于所述第一显示区的发光单元之间的间距等于所述第一显示区内相邻的发光单元之间的间距。
  13. 根据权利要求2所述的显示面板，其特征在于，所述发光单元包括多个子发光单元，所述第一显示区的子发光单元和所述第二显示区的子发光单元的排布方式相同。
  14. 根据权利要求2所述的显示面板，其特征在于，所述边框区包括V形槽和隔离柱，所述V形槽和所述隔离柱交替排列，且所述V形槽的深度高于所述隔离柱的高度。
  15. 根据权利要求14所述的显示面板，其特征在于，所述边框区包括一个坝部，其中，在所述坝部靠近所述显示区的一侧，离所述坝部最近的V形槽到所述坝部的距离小于离所述坝部最近的隔离柱到所述坝部的距离。
  16. 根据权利要求15所述的显示面板，其特征在于，所述填充层和所述黑矩阵都截止于所述坝部靠近所述显示区的一侧，且直接与所述坝部接触。
  17. 根据权利要求15所述的显示面板，其特征在于，在所述边框区中，所述黑矩阵在所述基板上的正投影与所述V形槽和所述隔离柱在所述基板上的正投影至少部分重叠。
  18. 根据权利要求2所述的显示面板，其特征在于，所述边框区中的黑矩阵的长度大于所述第一显示区和所述第二显示区中的黑矩阵长度。
  19. 一种拼接屏，其特征在于，包括多个如权利要求1～18任一项所述的显示面板，多个所述显示面板的所述边框区彼此拼接。
  20. 一种显示装置，其特征在于，包括如权利要求1～18中任一项所述的显示面板，或者如权利要求19所述的拼接屏。
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CN114242760A (zh) * 2021-12-17 2022-03-25 合肥维信诺科技有限公司 显示面板及显示装置
CN115394207A (zh) * 2022-09-19 2022-11-25 京东方科技集团股份有限公司 一种拼接显示装置
CN116682328A (zh) * 2023-06-12 2023-09-01 京东方科技集团股份有限公司 显示面板、拼接屏和显示装置

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