WO2019041938A1 - 像素结构、oled 显示屏以及蒸镀掩膜版 - Google Patents

像素结构、oled 显示屏以及蒸镀掩膜版 Download PDF

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Publication number
WO2019041938A1
WO2019041938A1 PCT/CN2018/090013 CN2018090013W WO2019041938A1 WO 2019041938 A1 WO2019041938 A1 WO 2019041938A1 CN 2018090013 W CN2018090013 W CN 2018090013W WO 2019041938 A1 WO2019041938 A1 WO 2019041938A1
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Prior art keywords
pixel
sub
adjacent
mask
pixels
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PCT/CN2018/090013
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English (en)
French (fr)
Inventor
周丽芳
李俊峰
刘明星
王徐亮
高峰
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昆山国显光电有限公司
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Publication of WO2019041938A1 publication Critical patent/WO2019041938A1/zh
Priority to US16/676,610 priority Critical patent/US10950666B2/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/04—Coating on selected surface areas, e.g. using masks
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/04—Coating on selected surface areas, e.g. using masks
    • C23C14/042—Coating on selected surface areas, e.g. using masks using 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10—Deposition of organic active material
    • H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
    • H10K71/166—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using selective deposition, e.g. using a mask
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a pixel structure, an OLED display panel including the pixel structure, and an evaporation mask.
  • OLED Organic Light-Emitting Diode
  • LCD Liquid Crystal Display
  • OLED display technology does not require a backlight and has self-luminous characteristics.
  • the OLED uses a thinner organic material film layer and a glass substrate, and when a current passes, the organic material emits light. Therefore, the OLED display can significantly save power, can be made lighter and thinner, can withstand a wider range of temperature changes than the LCD display, and has a larger viewing angle.
  • OLED display is expected to become the next-generation flat panel display technology after LCD, and it is one of the most popular technologies in flat panel display technology.
  • the side-by-side method has three sub-pixels of red, green, and blue (R, G, B) in a pixel (Pixel) range, each sub-pixel is rectangular, and each has its own independent organic
  • An illuminating component which forms an organic luminescent component by a vapor deposition film forming technique through a high-precision metal mask (FMM) on a corresponding pixel position on an array substrate, the high-definition metal mask
  • FMM high-precision metal mask
  • the stencil is often referred to simply as an evaporation mask or a metal mask.
  • the technology of making high PPI OLED displays focuses on fine and mechanically stable FMMs and pixel arrangements.
  • FIG. 1 is a schematic diagram of a pixel arrangement of an OLED display screen in the prior art.
  • the OLED display screen adopts a pixel juxtaposition manner, and each pixel unit Pixel includes an R sub-pixel region 101, a G sub-pixel region 103, and a B sub-pixel region 105, wherein the R sub-pixel region 101 includes R.
  • the light emitting region 102 and the R non-light emitting region, the G sub-pixel region 103 includes a G light emitting region 104 and a G non-light emitting region, and the B subpixel region 105 includes a B light emitting region 106 and a B non-light emitting region.
  • each sub-pixel region comprising a cathode, an anode and an electroluminescent layer (also referred to as an organic emission layer), wherein the electroluminescent layer is located between the cathode and the anode for generating a predetermined color of light for display .
  • an electroluminescent layer also referred to as an organic emission layer
  • the OLED display panel shown in FIG. 1 is generally vapor-deposited by using the FMM shown in FIG. 2.
  • the FMM includes a shielding area 107 and a plurality of vapor deposition openings 108, and an occlusion area between two adjacent vapor deposition openings 108 in the same column. It is a bridge.
  • a sufficient distance must be maintained between the sub-pixels and the bridge, which causes the lengths of the sub-pixels to decrease, and affects the aperture ratio of each sub-pixel.
  • the traditional RGB juxtaposed pixel arrangement can only reach 200-300 PPI, which is difficult to achieve high-resolution display. With the increasing demand for OLED display panel resolution, this RGB pixel juxtaposition can no longer meet the design requirements of high PPI.
  • the present disclosure provides a pixel structure of an OLED display panel, an OLED display panel, and an evaporation mask to solve the problems in the prior art.
  • the present disclosure provides a pixel structure including a plurality of pixel unit groups arranged in an array.
  • each of the pixel unit groups including a first sub-pixel, a second sub-pixel, and a third sub-pixel, an edge of the first sub-pixel adjacent to the third sub-pixel and away from the third sub-pixel.
  • the sides of the second sub-pixel are not parallel to each other, and the side of the second sub-pixel is not parallel to the edge away from the third sub-pixel.
  • At least two adjacent ones of the at least two adjacent groups of pixel units and/or at least two adjacent ones of the second sub-pixels use the same mask on the evaporation mask
  • the film opening is formed.
  • each of the pixel unit groups includes two first sub-pixels, two second sub-pixels, and one third sub-pixel, and each of the pixel unit groups includes at least two A pixel unit composed of a first sub-pixel, a second sub-pixel, and a third sub-pixel, each of the pixel units in the pixel unit group sharing a third sub-pixel.
  • the first sub-pixel, the second sub-pixel, and the third sub-pixel are all polygonal structures.
  • the shape of the first sub-pixel and the second sub-pixel is a right-angled trapezoid
  • the shape of the third sub-pixel is a diamond or a hexagon
  • the right-angled trapezoid The oblique waist is the side close to the third sub-pixel, and the right-angled waist of the right-angled trapezoid is the side away from the third sub-pixel, and the shape of the pixel unit group is a rectangle or a square.
  • the first sub-pixel and the second sub-pixel in each of the pixel unit groups are respectively arranged around the third sub-pixel, in the pixel unit group of the adjacent row
  • the third sub-pixel is staggered.
  • the third sub-pixel in the group of pixel cells of adjacent rows is offset by a distance of half of the group of pixel cells.
  • the acute angles of the right-angled trapezoids of the adjacent first pixels are different, and the acute angles of the right-angled trapezoids of the adjacent second pixels are different from each other.
  • the first sub-pixel and the second sub-pixel in each of the pixel unit groups are respectively arranged around the third sub-pixel, in the pixel unit group of the adjacent row
  • the third sub-pixels are aligned, and two of the pixel cell groups adjacent in the column and/or row direction are symmetrically distributed with respect to the boundaries of the two.
  • the acute angles of the right-angled trapezoids of the adjacent first pixels are oriented in the same direction
  • the acute angles of the right-angled trapezoids of the adjacent second pixels are oriented in the same direction.
  • a first sub-pixel in each of the pixel unit groups is arranged on one side of the third sub-pixel, and a second sub-pixel in each of the pixel unit groups Arranged on the other side of the third sub-pixel, the third sub-pixels of the adjacent pixel groups are aligned, and two of the pixels adjacent in the column and/or row direction
  • the cell group is symmetrically distributed about the boundaries of the two.
  • the colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel are one of red, blue, and green, and the The colors of one sub-pixel, the second sub-pixel, and the third sub-pixel are different from each other.
  • the present disclosure also provides an OLED display panel comprising any of the above pixel structures.
  • the present disclosure further provides an evaporation mask for forming any of the above pixel structures.
  • the mask opening of the evaporation mask is a polygon formed by combining at least two right-angled trapezoids.
  • the shape of the mask opening of the vapor deposition mask is a hexagon formed by combining the lower bottom edges of two right-angled trapezoids, and the acute angles of the two right-angled trapezoids are different, and the phases are different.
  • the mask openings on the adjacent rows are staggered.
  • the shape of the mask opening of the evaporation mask is a pentagon formed by combining the lower bottom edges of two right-angled trapezoids, and the acute angles of the two right-angled trapezoids face the same and form a mask.
  • the tips of the openings, the tips of the mask openings on adjacent rows are oriented differently, and the mask openings on adjacent rows are staggered.
  • the shape of the mask opening of the evaporation mask is an isosceles trapezoid formed by combining two right-angled trapezoids, and the mask openings on adjacent rows are aligned.
  • the shape of the mask opening of the evaporation mask is a hexagon formed by four right-angled trapezoids, and the right angles of the four right-angled trapezoids are arranged adjacent to each other.
  • the present disclosure includes a plurality of pixel unit groups arranged in an array, and adjacent at least two first sub-pixels of two adjacent pixel unit groups adopt the same mask on the evaporation mask.
  • the opening is formed, and at least two adjacent second sub-pixels of the adjacent two pixel unit groups are formed by using the same mask opening on the evaporation mask, and the margin generated by sharing one mask opening may be increased.
  • each pixel unit group includes two first sub-pixels, two second sub-pixels, and one third sub-pixel, and two pixel units in each pixel unit group share one third sub-pixel, by sharing a third Subpixels can increase the PPI.
  • the shape of the mask opening of the vapor deposition mask is a pentagonal shape formed by combining the lower bottom edges of two right-angled trapezoids, and the acute angles of the two right-angled trapezoids face the same and form a mask opening.
  • the tip end, the tip end of the mask opening on the adjacent row is oriented differently, which is advantageous for realizing the dispersion of tension during the web forming process and improving the strength of the vapor deposition mask.
  • FIG. 1 is a schematic diagram of a pixel structure in the prior art.
  • FIG. 2 is a schematic diagram of an FMM corresponding to FIG. 1.
  • FIG. 3 is a schematic diagram of a pixel structure in Embodiment 1 of the present disclosure.
  • FIG. 4 to 6 are schematic views of the pixel unit group of Fig. 3.
  • FIG. 7 to FIG. 12 are schematic diagrams showing another pixel unit group in Embodiment 1 of the present disclosure.
  • FIG. 13 is a schematic diagram corresponding to the FMM of FIG. 3.
  • FIG. 14 is a schematic diagram of a pixel structure in Embodiment 2 of the present disclosure.
  • FIG. 15 is a schematic diagram of an FMM corresponding to FIG. 14.
  • FIG. 16 is a schematic diagram of another pixel structure in Embodiment 2 of the present disclosure.
  • FIG. 17 is a schematic diagram of an FMM corresponding to FIG. 16.
  • FIG. 18 is a schematic diagram of a pixel structure in Embodiment 3 of the present disclosure.
  • FIG. 19 is a schematic diagram of an FMM corresponding to FIG. 18.
  • FIG. 20 is a schematic diagram of another pixel structure in Embodiment 3 of the present disclosure.
  • FIG. 21 is a schematic diagram of an FMM corresponding to FIG. 20.
  • FIG. 3 is a schematic diagram of a pixel arrangement of an OLED display screen according to Embodiment 1 of the present disclosure.
  • the X direction refers to an extending direction of each pixel row (also referred to as a row direction or a lateral direction)
  • the Y direction refers to a direction perpendicular to the X direction (also referred to as a column direction or a longitudinal direction).
  • the number of pixels in the actual product is not limited thereto, and the number of pixel units may be changed according to actual display requirements.
  • the pixel structure of the OLED display panel includes a plurality of pixel unit groups 300 arranged in an array.
  • each pixel unit group 300 may include two pixel units (as shown by a triangular dotted line frame in FIG. 4 or FIG. 5), and each pixel unit group 300 includes two first sub-pixels 301 and two second sub-pixels.
  • a pixel 302 and a third sub-pixel 303, two pixel units in each pixel unit group 300 share a third sub-pixel 303, and a PPI (Pixel Per Inch) is added by sharing the third sub-pixel 303. Number of pixels).
  • each pixel unit group 300 can also be divided into four pixel units (as shown by a triangular dotted line frame in FIG. 6), and four pixel units share one third sub-pixel 303.
  • the color of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 is any one of red, green, and blue, and the first sub-pixel 301 and the second sub-pixel 302
  • the colors of the third sub-pixels 303 are different.
  • the first sub-pixel 301 is a red (R) sub-pixel
  • the second sub-pixel 302 is a green (G) sub-pixel
  • the third sub-pixel 303 is a blue (B) sub-pixel.
  • the first sub-pixel 301 may be a blue sub-pixel or a green sub-pixel
  • the second sub-pixel 302 may be a blue sub-pixel or a red sub-pixel
  • the third sub-pixel 303 may be a green sub-pixel or a red sub-pixel, as long as The colors of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 may be different.
  • the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 each include a light-emitting area (display area) and a non-light-emitting area (non-display area), and the light-emitting area of each sub-pixel includes a cathode, an anode, and an electric An electroluminescent layer (also referred to as an organic emissive layer) positioned between the cathode and the anode for generating a predetermined color of light for display. As shown in FIG.
  • the first sub-pixel 301 includes a light-emitting area 3011 and a non-light-emitting area 3012
  • the second sub-pixel 302 includes a light-emitting area 3021 and a non-light-emitting area 3022
  • the third sub-pixel 303 includes a light-emitting area 3031.
  • the non-emissive regions 3032 typically require a three-time evaporation process to form electroluminescent layers of corresponding colors (eg, red, green, or blue) in the illumination regions of the corresponding color pixel regions, respectively.
  • two first sub-pixels 301 and two second sub-pixels 302 in each pixel unit group 300 are alternately arranged around the third sub-pixel 303, for example, the third sub-pixel 303.
  • the upper left side is the first sub-pixel 301
  • the lower left side is the second sub-pixel 302
  • the upper right side is the second sub-pixel 302
  • the lower right side is the first sub-pixel 301.
  • the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 are all polygonal structures; the first sub-pixel 301 and the second sub-pixel 302 each include a first side, a second side, and a third side. And a fourth side, the first side is adjacent to the third sub-pixel 303, and the second side is away from the third sub-pixel 303, and the first side and the second side are not parallel to each other.
  • the shape and size of the first sub-pixel 301 and the second sub-pixel 302 are the same, the first sub-pixel 301 and the second sub-pixel 302 are both rectangular trapezoids, and the third sub-pixel 303 is a diamond.
  • the side 301a of the light-emitting area 3011 of the first sub-pixel 301 near the third sub-pixel 303 (here, the oblique waist of the right-angled trapezoid, that is, the first side of the first sub-pixel 301) and the light-emitting area 3011 of the first sub-pixel 301
  • the side 301b away from the third sub-pixel 303 (here, the right-angled waist of the right-angled trapezoid, that is, the second side of the first sub-pixel 301) is not parallel to each other, and the light-emitting area 3021 of the second sub-pixel 302 is close to the third sub-pixel.
  • the side 302a of the 303 (here, the oblique waist of the right-angled trapezoid, that is, the first side of the second sub-pixel 302) and the side 302b of the light-emitting area 3021 of the second sub-pixel 302 away from the third sub-pixel 303 (here, a right angle)
  • the right angle waist of the trapezoid, that is, the second side of the second sub-pixel 302) is not parallel to each other.
  • the sides 301d, 302d (for example, the upper base of the right-angled trapezoid) of the first sub-pixel 301 and the second sub-pixel 302 adjacent in the column direction (Y direction) are adjacent to each other.
  • the two first sub-pixels 301 and the two second sub-pixels 302 surround the third sub-pixel 303 and form a rectangular or square structure.
  • the shapes (and sizes) of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 allow for some deformation.
  • the shapes of the first sub-pixel 301 and the second sub-pixel 302 may be different, or the first sub-pixel 301 and the second sub-pixel 302 have the same shape but different sizes (for example, the height of the right-angled trapezoid but the right-angled trapezoid is different) ), the area can be adjusted according to the specific application needs.
  • the shapes of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 are not limited to a right-angled trapezoid.
  • the first sub-pixel 301 and the second sub-pixel 302 are also approximately rectangular trapezoidal (the angle between the sides 301b, 301c of the first sub-pixel 301, the angle between the sides 301b, 301d may be greater than 80 degrees and less than 90 degrees or greater than 90 degrees and less than 100 degrees).
  • the shape of the third sub-pixel 303 can be changed, for example, can be a hexagonal structure, as shown in FIG.
  • adjacent two sides of the first sub-pixel 301 and the second sub-pixel 302, such as 301b, 301c may be vertical connections (as shown in FIG. 4), or may be arc-shaped connections, ie, adjacent.
  • the two sides 301b, 301c are connected by a curved line segment 301e (as shown in FIG. 8), or the adjacent two sides 301b, 301c may also be connected by a straight line segment 301f, so that the quadrilateral is expanded to an octagon (As shown in Figure 9).
  • the two adjacent sides may also be connected by two straight line segments, so that the quadrilateral is expanded into a dodecagonal shape, and details are not described herein again.
  • the pixel structure shown in FIG. 3 can be rotated 90 degrees clockwise or counterclockwise, and the pixel structure as shown in FIG. 10 can be obtained.
  • each pixel unit group 300 can include two first sub-pixels 301, two second sub-pixels 302, and two third sub-pixels 303, each pixel unit group 300 including two pixel units, each The pixel units each include a first sub-pixel 301, a second sub-pixel 302, and a third sub-pixel 303.
  • the two first sub-pixels 301 and the two second sub-pixels 302 in each pixel unit group 300 are alternately arranged around the two third sub-pixels 303, and the first sub-pixel 301 and the second sub-pixel 302 are both
  • the rectangular sub-pixel 303 is a triangle (for example, an isosceles triangle).
  • the two third sub-pixels 303 may be arranged in the row direction (as shown in Fig. 11), and the two third sub-pixels 303 may also be arranged in the column direction (as shown in Fig. 12).
  • the third sub-pixels 303 in the pixel unit group 300 of adjacent rows are shifted (shifted) by the arrangement (for example, the distance of the half pixel unit group is shifted). That is, the pixel unit groups 300 of the odd rows are arranged the same, and the pixel unit groups 300 of the even rows are also arranged the same, but the third sub-pixels 303 of the pixel unit groups between the odd rows and the even rows are not aligned. (positively) arranged, but offsetting the distance of a half pixel unit group, that is, the center line of the third sub-pixel on the even-numbered line coincides with the boundary between two adjacent pixel unit groups on the odd-numbered line .
  • two of the two pixel unit groups adjacent to each other on the adjacent row are adjacently arranged, and two of the two pixel unit groups adjacent to each other on the adjacent row are adjacent to each other Arrangement.
  • two adjacent first sub-pixels 301 of the adjacent two pixel unit groups are formed by the same mask opening on the evaporation mask, and two adjacent ones of the adjacent two pixel unit groups.
  • the second sub-pixel 302 is formed using the same mask opening on the evaporation mask.
  • the aperture ratio or PPI can be increased by sharing the margin generated by one mask opening.
  • the first sub-pixel in the lower right row of the pixel unit group on the Nth row is adjacent to the first sub-pixel in the upper left of the adjacent pixel unit group on the N+1th row (eg, The dotted frame 300-1 shown in FIG. 3 can be formed by using the same mask opening on the evaporation mask, and the first sub-pixel in the lower right pixel group on the (N+1)th row is the N+
  • the first sub-pixels in the upper left of the adjacent pixel unit groups on the two rows are arranged adjacent to each other (as shown by the broken line frame 300-2 in FIG. 3), and may be formed by using the same mask opening on the evaporation mask. This type of push.
  • the second sub-pixel in the lower left row of the pixel unit group on the Nth row is adjacent to the second sub-pixel in the upper right of the pixel unit group adjacent to the N+1th row (see FIG. 3).
  • the second sub-pixel in the lower left pixel cell group on the (N+1)th row is the second upper right row in the pixel cell group adjacent to the N+2th row.
  • the sub-pixels are arranged adjacently (as shown by dashed box 300-4 in Figure 3), and so on.
  • FIG. 13 is a schematic diagram of an FMM (fine metal mask) corresponding to the pixel structure shown in FIG.
  • the FMM includes an occlusion region 407 and a plurality of mask openings 408, and the occlusion region between the adjacent two mask openings 408 is referred to as a bridge.
  • the mask opening 408 corresponds to a sub-pixel of the same color (eg, red) in FIG.
  • the first sub-pixel and the second sub-pixel can be arranged by dislocation, and an evaporation mask is shared to save the saving. cost.
  • the first sub-pixel 301 and the second sub-pixel 302 are both right-angled trapezoids, and two of the two pixel unit groups adjacent to each other on the adjacent row are under the two first sub-pixels 301.
  • the bottom edges are adjacently arranged, the lower bottom edges of the two second sub-pixels 302 are adjacently arranged, and the acute angles of the right-angled trapezoids of the two first sub-pixels 301 are different, and the acute angles of the right-angled trapezoids of the two second sub-pixels 302 are opposite.
  • the orientation is different.
  • the shape of the mask opening 408 of the evaporation mask is formed by combining the lower bottom edges of two right-angled trapezoids (as shown by 300-1 in FIG. 3).
  • the staggered arrangement increases the distance between the two mask openings 408 closest to each other in the adjacent two rows, thereby increasing the strength of the FMM and avoiding the occurrence of FMM and breakage of the FMM as much as possible.
  • Such problems reduce the vapor deposition film halo, offset and other defects affecting the quality of vapor deposition.
  • FIG. 14 is a schematic diagram of a pixel arrangement of an OLED display screen according to Embodiment 2 of the present disclosure.
  • the pixel structure of the OLED display panel includes a plurality of pixel unit groups 300 arranged in an array. Two first sub-pixels 301 and two second sub-pixels 302 in each pixel unit group 300 are alternately arranged around the third sub-pixel 303, and the third sub-pixels 303 in the pixel unit group 300 of adjacent rows are aligned. ( ⁇ ) Arrangement.
  • the two pixel unit groups 300 adjacent in the column direction are symmetrically distributed (mirror symmetric distribution) with respect to the boundaries of the two.
  • two of the two pixel unit groups 300 adjacent in the column direction are adjacently arranged, and at the same time, two second sub-pixels 302 of the two pixel unit groups adjacent in the column direction.
  • Adjacent arrangement As such, two adjacent first sub-pixels 301 of the adjacent two pixel unit groups may be formed by using the same mask opening on the evaporation mask, and adjacent two of the adjacent two pixel unit groups.
  • the second sub-pixels 302 can be formed using the same mask opening on the evaporation mask.
  • the margin generated by sharing a mask opening can be used to increase the aperture ratio or PPI.
  • the first sub-pixel 301 and the second sub-pixel 302 are both rectangular trapezoids.
  • the lower bottom edges of the two first sub-pixels 301 are adjacently arranged, and two The lower bases of the second sub-pixels 302 are adjacently arranged, and the acute angles of the right-angled trapezoids of the first sub-pixels 301 are oriented the same, and the acute-angled trapezoids of the second sub-pixels 302 are oriented at the same angle.
  • the shape of the mask opening 408 of the evaporation mask is formed by combining the lower bottom edges of two right-angled trapezoids (as shown by 300-1 in FIG. 3).
  • the acute angle of the right-angled trapezoid of the first sub-pixel 301 is the same, the acute angles of the two right-angled trapezoids of the second sub-pixel 302 are the same, and the acute angle of the right-angled trapezoid of the first sub-pixel 301 forms the tip of the mask opening, and the second The acute angle of the right-angled trapezoid of the sub-pixel 302 forms the tip end of the mask opening, and the tip end of the mask opening on the adjacent row faces differently (for example, the tip of the mask opening 408 in the odd row is directed to the left, and the mask opening in the even row)
  • the tip of 408 is facing to the right, that is, the orientation of the mask opening on the adjacent row is different, and the design of the opposite sex is advantageous for the dispersion of the tension during the stretching process and the stability of the evaporation mask.
  • the mask openings on adjacent rows are staggered (displaced) by the staggered arrangement between the two mask openings 408 closest to each other in the adjacent two rows.
  • the distance is increased, the strength of the FMM can be increased, the problem of warping and fracture of the FMM can be avoided as much as possible, and the defects of evaporation coating quality such as evaporation and offset of the vapor deposition film layer can be reduced.
  • the two pixel unit groups 300 adjacent in the column direction are symmetrically distributed (mirror symmetric distribution) with respect to the boundaries of the two, and the arrangement of the pixel unit groups 300 on the same line is the same.
  • the adjacent two pixel unit groups 300 on the same row may also be arranged differently, but symmetrically distributed on the boundaries of the two (mirror symmetric distribution), as shown in FIG. 16, the row direction and the column direction.
  • the upper two adjacent pixel unit groups 300 are mirror-symmetrically distributed.
  • the adjacent four first sub-pixels 301 of the adjacent four pixel unit groups may be formed by using the same mask opening on the evaporation mask, and adjacent four of the adjacent four pixel unit groups.
  • the second sub-pixels 302 can be formed by using the same mask opening on the evaporation mask. By sharing the margin generated by one mask opening, the aperture ratio or PPI can be increased.
  • 17 is a schematic diagram of an FMM corresponding to FIG. 16. As shown in FIG. 17, the shape of the mask opening 408 of the evaporation mask is a hexagon formed by a combination of four right-angled trapezoids, and the right angles of the four right-angled trapezoids are arranged adjacent to each other.
  • FIG. 18 is a schematic diagram of a pixel arrangement of an OLED display screen according to Embodiment 3 of the present disclosure.
  • the pixel structure of the OLED display panel includes a plurality of pixel cell groups 300 arranged in an array. Two first sub-pixels 301 in each pixel unit group 300 are arranged on one side (such as the left side) of the third sub-pixel 303, and two second sub-pixels 302 in each pixel unit group are arranged in the The other side (such as the right side) of the third sub-pixel 303 is described, and the third sub-pixels in the pixel unit group of the adjacent row are aligned.
  • the two pixel unit groups 300 adjacent in the column direction are symmetrically distributed (mirror symmetric distribution) with respect to the boundaries of the two.
  • two first sub-pixels 301 of two adjacent pixel unit groups 300 on adjacent rows are adjacently arranged, and at the same time, two second sub-pixels of two adjacent pixel unit groups on adjacent rows
  • the pixels 302 are arranged adjacent to each other.
  • two adjacent first sub-pixels 301 of the adjacent two pixel unit groups are formed by the same mask opening on the evaporation mask, and two adjacent ones of the adjacent two pixel unit groups.
  • the second sub-pixel 302 is formed using the same mask opening on the evaporation mask.
  • the margin generated by sharing a mask opening can be used to increase the aperture ratio or PPI.
  • the first sub-pixel 301 and the second sub-pixel 302 are both right-angled trapezoids.
  • the right-angle waists of the two first sub-pixels 301 are adjacent to each other, and two The right angle waists of the second sub-pixels 302 are adjacently arranged, and the acute angles of the right-angled trapezoids of the two first sub-pixels 301 are oriented differently (one upward, the other downward), and the right-angle trapezoids of the two second sub-pixels 302 The acute angles are different (one facing up and the other facing down).
  • the shape of the mask opening 408 of the evaporation mask is an isosceles trapezoid formed by combining two right-angled trapezoids, and the mask openings of all rows face the same (ie, all isosceles)
  • the trapezoids are arranged in the same direction).
  • FIG. 21 is a schematic diagram of an FMM corresponding to FIG. 20.
  • the shape of the mask opening 408 of the vapor deposition mask is a hexagon formed by a combination of four right-angled trapezoids, and the right angles of the four right-angled trapezoids are arranged adjacent to each other.

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Abstract

本公开提供了一种像素结构、OLED 显示屏以及蒸镀掩膜版。所述像素结构包括阵列排布的多个像素单元组。在每个所述像素单元组中，包括第一子像素、第二子像素以及第三子像素，所述第一子像素的靠近所述第三子像素的边与远离所述第三子像素的边互不平行，所述第二子像素的靠近所述第三子像素的边与远离所述第三子像素的边互不平行。至少两个相邻的所述像素单元组中的至少两个相邻的所述第一子像素和/或至少两个相邻的所述第二子像素采用蒸镀掩膜板上的同一掩膜开口形成。通过共用一个掩膜开口所产生的余量，可增加开口率或增加 PPI。

Description

像素结构、OLED显示屏以及蒸镀掩膜版 技术领域
本公开涉及显示技术领域，特别涉及一种像素结构、包含所述像素结构的OLED显示屏以及蒸镀掩膜版。
背景技术
OLED(Organic Light-Emitting Diode，有机发光二极管)是主动发光器件。与传统的LCD(Liquid Crystal Display，液晶显示)显示方式相比，OLED显示技术无需背光灯，具有自发光的特性。OLED采用较薄的有机材料膜层和玻璃基板，当有电流通过时，有机材料就会发光。因此OLED显示屏能够显著节省电能，可以做得更轻更薄，比LCD显示屏耐受更宽范围的温度变化，而且可视角度更大。OLED显示屏有望成为继LCD之后的下一代平板显示技术，是目前平板显示技术中受到关注最多的技术之一。
OLED屏体的彩色化方法有许多种，现在较为成熟并已经成功量产的OLED彩色化技术主要是OLED蒸镀技术，其采用传统的RGB Stripe(RGB条状)排列方式进行蒸镀。其中画面效果最好的是side-by-side(并置)的方式。side-by-side方式是在一个像素(Pixel)范围内有红、绿、蓝(R、G、B)三个子像素(sub-pixel)，每个子像素均呈长方形，且各自具有独立的有机发光元器件，它是利用蒸镀成膜技术透过高精细金属掩膜版(Fine Metal Mask，FMM)在array(阵列)基板上相应的像素位置形成有机发光元器件，所述高精细金属掩膜版通常简称为蒸镀掩膜版或金属掩膜板。制作高PPI的OLED显示屏的技术重点在于精细及机械稳定性好的FMM以及像素的排布方式。
图1为现有技术中一种OLED显示屏的像素排布示意图。如图1所示，该OLED显示屏采用像素并置的方式，每个像素单元Pixel包括R子像素区域101、G子像素区域103以及B子像素区域105，其中，R子像素区域101包括R发光区102以及R非发光区，G子像素区域103包括G发光区104以及G非发光区，B子像素区域105包括B发光区106以及B非发光区。图1中所示R、G、B子像素均为长方形且发光区面积相等，并且R、G、B子像素呈直线排 列。在每个子像素区域的发光区中，包括阴极、阳极和电致发光层(亦称为有机发射层)，其中，电致发光层位于阴极和阳极之间，用于产生预定颜色光线以实现显示。在制备显示屏时，通常需要利用三次蒸镀工艺以分别在对应颜色像素区域的发光区中形成对应颜色的电致发光层。
图1所示的OLED显示面板通常采用图2所示FMM进行蒸镀，该FMM包括遮挡区107以及若干个蒸镀开口108，同一列相邻的两个蒸镀开口108之间的遮挡区称之为连接桥(bridge)。为了避免蒸镀时对子像素产生遮蔽效应，子像素与bridge间必须保持足够的距离，这就导致子像素上下的长度缩小，而影响了每一个子像素的开口率。传统的RGB并置像素排列方式，最高只能达到200～300PPI，难以实现高分辨率的显示效果。随着用户对OLED显示面板分辨率的需求越来越高，这种RGB像素并置的方式已不能满足产品高PPI的设计要求。
发明内容
申请人经过研究发现，传统的RGB像素排列方式已不能同时满足产品的开口率和显示效果的要求。基于此，本公开提供一种OLED显示屏的像素结构、OLED显示屏以及蒸镀掩膜版，以解决现有技术中存在的问题。
为解决上述技术问题，本公开提供一种像素结构，所述像素结构包括阵列排布的多个像素单元组，
在每个所述像素单元组中，包括第一子像素、第二子像素以及第三子像素，所述第一子像素的靠近所述第三子像素的边与远离所述第三子像素的边互不平行，所述第二子像素的靠近所述第三子像素的边与远离所述第三子像素的边互不平行，
至少两个相邻的所述像素单元组中的至少两个相邻的所述第一子像素和/或至少两个相邻的所述第二子像素采用蒸镀掩膜板上的同一掩膜开口形成。
可选的，在所述像素结构中，每个所述像素单元组包括两个第一子像素、两个第二子像素以及一个第三子像素，每个所述像素单元组包括至少两个由一个第一子像素、一个第二子像素以及一个第三子像素构成的像素单元，每个所 述像素单元组中的像素单元均共用第三子像素。
可选的，在所述像素结构中，所述第一子像素、所述第二子像素以及所述第三子像素均为多边形结构。
可选的，在所述像素结构中，所述第一子像素和所述第二子像素的形状为直角梯形，所述第三子像素的形状为菱形或六边形，所述直角梯形的斜腰为所述靠近所述第三子像素的边，所述直角梯形的直角腰为所述远离所述第三子像素的边，所述像素单元组的形状为长方形或正方形。
可选的，在所述像素结构中，每个所述像素单元组中的第一子像素以及第二子像素分别排布在第三子像素周围，相邻行的所述像素单元组中的第三子像素错开排布。相邻行的所述像素单元组中的第三子像素错开半个所述像素单元组的距离。在相邻行的所述像素单元组中，相邻的所述第一像素的直角梯形的锐角朝向不同，相邻的所述第二像素的直角梯形的锐角朝向相同不同。
可选的，在所述像素结构中，每个所述像素单元组中的第一子像素以及第二子像素分别排布在第三子像素周围，相邻行的所述像素单元组中的第三子像素对齐排布，并且，在列和/或行方向上相邻的两个所述像素单元组关于二者的边界对称分布。在相邻行的所述像素单元组中，相邻的所述第一像素的直角梯形的锐角朝向相同，相邻的所述第二像素的直角梯形的锐角朝向相同。
可选的，在所述像素结构中，每个所述像素单元组中的第一子像素排布在所述第三子像素的一侧，每个所述像素单元组中的第二子像素排布在所述第三子像素的另一侧，相邻行的所述像素单元组中的第三子像素对齐排布，并且，在列和/或行方向上相邻的两个所述像素单元组关于二者的边界对称分布。
可选的，在所述像素结构中，所述第一子像素、所述第二子像素和所述第三子像素的颜色为红色、蓝色和绿色中的一种，并且，所述第一子像素、所述第二子像素、所述第三子像素的颜色互不相同。
本公开还提供一种OLED显示屏，包含如上任一像素结构。
本公开又提供一种蒸镀掩膜版，用以形成如上任一像素结构。
可选的，所述蒸镀掩膜版的掩膜开口是由至少两个直角梯形结合在一起而形成的多边形。
可选的，所述蒸镀掩膜版的掩膜开口的形状是由两个直角梯形的下底边结合在一起而形成的六边形，所述两个直角梯形的锐角朝向不同，且相邻行上的掩膜开口错开排布。
可选的，所述蒸镀掩膜版的掩膜开口的形状是两个直角梯形的下底边结合在一起而形成的五边形，所述两个直角梯形的锐角朝向相同并形成掩膜开口的尖端，相邻行上的掩膜开口的尖端朝向不同，且相邻行上的掩膜开口错开排布。
可选的，所述蒸镀掩膜版的掩膜开口的形状是由两个直角梯形结合在一起而形成的等腰梯形，且相邻行上的掩膜开口对齐排布。
可选的，所述蒸镀掩膜版的掩膜开口的形状是由四个直角梯形结合在一起而形成的六边形，所述四个直角梯形的直角邻近布置。
与现有技术相比，本公开包括阵列排布的多个像素单元组，相邻的两个像素单元组中的相邻的至少两个第一子像素采用蒸镀掩膜板上同一掩膜开口形成，相邻的两个像素单元组中的相邻的至少两个第二子像素采用蒸镀掩膜板上同一掩膜开口形成，通过共用一个掩膜开口所产生的余量，可增加开口率或增加PPI。
另外，每个像素单元组包括两个第一子像素、两个第二子像素以及一个第三子像素，每个像素单元组中的两个像素单元共用一个第三子像素，通过共用第三子像素可增加PPI。
此外，所述蒸镀掩膜版的掩膜开口的形状是两个直角梯形的下底边结合在一起而形成的五边形，所述两个直角梯形的锐角朝向相同并形成掩膜开口的尖端，相邻行上的掩膜开口的尖端朝向不同，有利于实现张网过程中张力的分散，提高蒸镀掩膜版的强度。
附图说明
图1为现有技术中一种像素结构的示意图。
图2为对应图1的一种FMM的示意图。
图3为本公开实施例一中一种像素结构的示意图。
图4至图6为图3中像素单元组的示意图。
图7至图12为本公开实施例一中另一种像素单元组的示意图。
图13为对应图3的FMM的示意图。
图14为本公开实施例二中一种像素结构的示意图。
图15为对应图14的一种FMM的示意图。
图16为本公开实施例二中另一种像素结构的示意图。
图17为对应图16的一种FMM的示意图。
图18为本公开实施例三中一种像素结构的示意图。
图19为对应图18的一种FMM的示意图。
图20为本公开实施例三中另一种像素结构的示意图。
图21为对应图20的一种FMM的示意图。
具体实施方式
以下结合附图对本公开作进一步详细说明。根据下面说明和权利要求书，本公开的优点和特征将更清楚。
实施例一
图3为本公开实施例一中OLED显示屏的像素排布示意图。其中，X方向是指每一像素行的延伸方向(亦称为行方向或横向)，Y方向是指与X方向相垂直的方向(亦称之为列方向或纵向)。为简便，图3中只表示出了OLED显示屏的一部分结构，实际产品中像素数量不限于此，像素单元的数量可依据实际显示需要作相应的变化。
如图3所示，OLED显示屏的像素结构包括阵列排布的多个像素单元组300。其中，每个像素单元组300可以包括两个像素单元(如图4或图5中的三角形虚线框所示)，每个像素单元组300包括两个第一子像素301、两个第二子像素302以及一个第三子像素303，每个像素单元组300中的两个像素单元共用一个第三子像素303，通过共用第三子像素303可增加PPI(Pixel Per Inch，每英寸所拥有的像素数目)。当然，每个像素单元组300也可以划分为四个像素单元(如图6中的三角形虚线框所示)，四个像素单元共用一个第三子像素303。
每个像素单元组300中，第一子像素301、第二子像素302、第三子像素303 的颜色为红色、绿色、蓝色其中任一，且第一子像素301、第二子像素302、第三子像素303的颜色各不相同。比如，图3中，第一子像素301为红色(R)子像素、第二子像素302为绿色(G)子像素、第三子像素303为蓝色(B)子像素。当然，第一子像素301可以为蓝色子像素或绿色子像素，第二子像素302可以为蓝色子像素或红色子像素，第三子像素303可以为绿色子像素或红色子像素，只要第一子像素301、第二子像素302、第三子像素303的颜色各不相同即可。
所述第一子像素301、第二子像素302、第三子像素303各自包括发光区(显示区)和非发光区(非显示区)，每个子像素的发光区中包括阴极、阳极和电致发光层(亦称为有机发射层)，所述电致发光层位于阴极和阳极之间，用于产生预定颜色光线以实现显示。如图3所示，本实施例中，第一子像素301包括发光区3011和非发光区3012，第二子像素302包括发光区3021和非发光区3022，第三子像素303包括发光区3031和非发光区3032，通常需要利用三次蒸镀工艺以分别在对应颜色像素区域的发光区中形成对应颜色(如红色、绿色或蓝色)的电致发光层。
结合图3和4所示，每个像素单元组300中的两个第一子像素301以及两个第二子像素302交替排布在第三子像素303周围，例如，第三子像素303的左侧上方为第一子像素301，左侧下方为第二子像素302，右侧上方为第二子像素302，右侧下方为第一子像素301。
所述第一子像素301、第二子像素302以及第三子像素303均为多边形结构；所述第一子像素301以及第二子像素302各自包括第一边、第二边、第三边以及第四边，所述第一边靠近所述第三子像素303，所述第二边远离所述第三子像素303，所述第一边和第二边互不平行。优选方案中，第一子像素301和第二子像素302的形状和尺寸均相同，第一子像素301和第二子像素302均为直角梯形，第三子像素303为菱形。第一子像素301的发光区3011的靠近第三子像素303的边301a(这里是指直角梯形的斜腰，即第一子像素301的第一边)与第一子像素301的发光区3011的远离第三子像素303的边301b(这里是指直角梯形的直角腰，即第一子像素301的第二边)互不平行，第二子像素302的发光 区3021的靠近第三子像素303的边302a(这里是指直角梯形的斜腰，即第二子像素302的第一边)与第二子像素302的发光区3021的远离第三子像素303的边302b(这里是指直角梯形的直角腰，即第二子像素302的第二边)互不平行。列方向(Y方向)上相邻的第一子像素301和第二子像素302的各自相同性质的边301d、302d(例如是直角梯形的上底边)相邻。两个第一子像素301以及两个第二子像素302将第三子像素303包围并构成长方形或正方形结构。
可以理解的是，第一子像素301、第二子像素302和第三子像素303的形状(和尺寸)允许存在一定变形。一方面，第一子像素301和第二子像素302的形状可以不相同，或者，第一子像素301和第二子像素302形状相同但尺寸不同(比如均为直角梯形但直角梯形的高不同)，可根据具体的应用需求调整其面积。
另一方面，第一子像素301、第二子像素302和第三子像素303的形状并不限制为直角梯形。比如，第一子像素301、第二子像素302近似为直角梯形亦被允许(第一子像素301的边301b、301c之间的角度、边301b、301d之间的角度可以大于80度且小于90度或大于90度且小于100度)。同时，第三子像素303的形状可以做一些变化，比如可以为六边形结构，如图7所示。
再一方面，第一子像素301和第二子像素302各自的相邻的两条边诸如301b、301c可以是垂直连接(如图4所示)，也可以是弧形连接，即，相邻的两条边301b、301c通过弧形线段301e连接(如图8所示)，或者，相邻的两条边301b、301c也可以是通过一条直线段301f连接，使得该四边形拓展为八边形(如图9所示)。当然，相邻的两条边也可以是通过两条直线段连接，使得该四边形拓展为十二边形，在此不再赘述。此外，根据实际设计和生产需要，可以将图3所示像素结构顺时针或逆时针旋转90度，则可得到如图10所示的像素结构。
又一方面，每个像素单元组300可以包括两个第一子像素301、两个第二子像素302以及两个第三子像素303，每个像素单元组300包括两个像素单元，每个像素单元各自包括一个第一子像素301、一个第二子像素302以及一个第三子像素303。其中，每个像素单元组300中的两个第一子像素301以及两个第二子像素302交替排布在两个第三子像素303周围，第一子像素301和第二子像素302均为直角梯形，第三子像素303为三角形(例如是等腰三角形)。两个第三 子像素303可以沿行方向排列(如图11所示)，两个第三子像素303也可以沿列方向排列(如图12所示)。
继续参考图3，本实施例中，相邻行的像素单元组300中的第三子像素303错开(移位)排布(例如是错开半个像素单元组的距离)。也就是说，奇数行的像素单元组300排布相同，偶数行的像素单元组300排布亦是相同，但是奇数行和偶数行之间的像素单元组中的第三子像素303并非是对齐(正对)排布的，而是错开半个像素单元组的距离，即，偶数行上的第三子像素的中心线与奇数行上的两个相邻的像素单元组之间的边界重合。并且，相邻行上相邻的两个像素单元组中的两个第一子像素301相邻布置，相邻行上相邻的两个像素单元组中的两个第二子像素302相邻布置。如此，相邻的两个像素单元组中的相邻的两个第一子像素301采用蒸镀掩膜板上同一掩膜开口形成，相邻的两个像素单元组中的相邻的两个第二子像素302采用蒸镀掩膜板上同一掩膜开口形成。通过共用一个掩模开口所产生的余量，可增加开口率或PPI。
本实施例中，第N行上的像素单元组中的右下方的第一子像素是与第N+1行上相邻的像素单元组中的左上方的第一子像素相邻布置(如图3中虚线框300-1所示)，可采用蒸镀掩膜板上同一掩膜开口形成，第N+1行上的像素单元组中的右下方的第一子像素是与第N+2行上相邻的像素单元组中的左上方的第一子像素相邻布置(如图3中虚线框300-2所示)，可采用蒸镀掩膜板上同一掩膜开口形成，以此类推。同理，第N行上的像素单元组中的左下方的第二子像素是与第N+1行上相邻的像素单元组中的右上方的第二子像素相邻布置(如图3中虚线框300-3所示)，第N+1行上的像素单元组中的左下方的第二子像素是与第N+2行上相邻的像素单元组中的右上方的第二子像素相邻布置(如图3中虚线框300-4所示)，以此类推。
图13为对应图3所示像素结构的一种FMM(fine metal mask，高精度金属掩模版)的示意图。如图13所示，该FMM包括遮挡区407以及若干个掩膜开口408，相邻的两个掩膜开口408之间的遮挡区称之为连接桥(bridge)。掩膜开口408对应于图3中同一种颜色(例如红色)的子像素。当然，在第一子像素和第二子像素的形状和尺寸均相同的情况下，第一子像素和第二子像素可以通过错 位的方式排布，共用一个蒸镀掩膜板来实现，节约成本。
如图3所示，本实施例中，第一子像素301和第二子像素302均为直角梯形，相邻行上相邻的两个像素单元组中，两个第一子像素301的下底边相邻布置，两个第二子像素302的下底边相邻布置，并且，两个第一子像素301的直角梯形的锐角朝向不同，两个第二子像素302的直角梯形的锐角朝向不同。相应的，如图13所示，所述蒸镀掩膜版的掩膜开口408的形状是由两个直角梯形的下底边结合在一起(如图3中的300-1所示)而形成的六边形，两个第一子像素301的直角梯形的锐角朝向不同，两个第二子像素302的直角梯形的锐角朝向不同，相邻行上的掩膜开口错开(移位)排布。从图13可以看出，这种错开布置，相邻的两行中距离最近的两个掩膜开口408之间的距离得到了增加，可增加FMM的强度，尽可能避免FMM发生翘由、断裂等问题，减少蒸镀膜层晕开、偏移等影响蒸镀品质的缺陷。
实施例二
图14为本公开实施例二中一种OLED显示屏的像素排布示意图。如图14所示，OLED显示屏的像素结构包括阵列排布的多个像素单元组300。每个像素单元组300中的两个第一子像素301以及两个第二子像素302交替排布在第三子像素303周围，相邻行的像素单元组300中的第三子像素303对齐(正对)排布。继续参考图14所示，列方向上相邻的两个像素单元组300关于二者的边界对称分布(镜像对称分布)。具体的，列方向上相邻的两个像素单元组300中的两个第一子像素301相邻布置，同时，列方向上相邻的两个像素单元组中的两个第二子像素302相邻布置。如此，相邻的两个像素单元组中的相邻的两个第一子像素301可采用蒸镀掩膜板上同一掩膜开口形成，相邻的两个像素单元组中的相邻的两个第二子像素302可采用蒸镀掩膜板上同一掩膜开口形成。通过共用一个掩模开口所产生的余量，可用于增加开口率或PPI。
本实施例中，第一子像素301和第二子像素302均为直角梯形，列方向上相邻的两个像素单元组中，两个第一子像素301的下底边相邻布置，两个第二子像素302的下底边相邻布置，并且，第一子像素301的直角梯形的锐角朝向相同，第二子像素302的直角梯形的锐角朝向相同。相应的，如图15所示，蒸 镀掩膜版的掩膜开口408的形状是由两个直角梯形的下底边结合在一起(如图3中的300-1所示)而形成的五边形，第一子像素301的直角梯形的锐角朝向相同，第二子像素302的两个直角梯形的锐角朝向相同，第一子像素301的直角梯形的锐角形成掩膜开口的尖端，第二子像素302的直角梯形的锐角形成掩膜开口的尖端，相邻行上的掩膜开口的尖端朝向不同(比如奇数行中的掩膜开口408的尖端朝左，而偶数行中的掩膜开口408的尖端朝右)，即，相邻行上的掩膜开口的朝向不同，这种异性的设计有利于张网过程中张力的分散，提高蒸镀掩膜板的稳定性。
进一步的，从图15可以看出，相邻行上的掩膜开口错开(移位)排布，通过这种错开布置，相邻的两行中距离最近的两个掩膜开口408之间的距离得到了增加，可增加FMM的强度，尽可能避免FMM发生翘由、断裂等问题，减少蒸镀膜层晕开、偏移等影响蒸镀品质的缺陷。
如图14所示，列方向上相邻的两个像素单元组300关于二者的边界对称分布(镜像对称分布)，同一行上的像素单元组300的排布相同。但在具体实施时，同一行上相邻的两个像素单元组300也可以排布不同，而是关于二者的边界对称分布(镜像对称分布)，如图16所示，行方向和列方向上相邻的两个像素单元组300之间均为镜像对称分布。如此，相邻的四个像素单元组中的相邻的四个第一子像素301可采用蒸镀掩膜板上同一掩膜开口形成，相邻的四个像素单元组中的相邻的四个第二子像素302可采用蒸镀掩膜板上同一掩膜开口形成，通过共用一个掩模开口所产生的余量，可增加开口率或PPI。图17为对应图16的一种FMM的示意图。如图17所示，所述蒸镀掩膜版的掩膜开口408的形状是由四个直角梯形结合在一起而形成的六边形，所述四个直角梯形的直角邻近布置。
实施例三
图18为本公开实施例三中一种OLED显示屏的像素排布示意图。OLED显示屏的像素结构包括阵列排布的多个像素单元组300。每个像素单元组300中的两个第一子像素301排布在第三子像素303的一侧(如左侧)，每个像素单元组中的两个第二子像素302排布在所述第三子像素303的另一侧(如右侧)，并且， 相邻行的像素单元组中的第三子像素对齐排布。
并且，列方向上相邻的两个像素单元组300关于二者的边界对称分布(镜像对称分布)。具体的，相邻行上相邻的两个像素单元组300中的两个第一子像素301相邻布置，同时，相邻行上相邻的两个像素单元组中的两个第二子像素302相邻布置。如此，相邻的两个像素单元组中的相邻的两个第一子像素301采用蒸镀掩膜板上同一掩膜开口形成，相邻的两个像素单元组中的相邻的两个第二子像素302采用蒸镀掩膜板上同一掩膜开口形成。通过共用一个掩模开口所产生的余量，可用于增加开口率或PPI。
本实施例中，第一子像素301和第二子像素302均为直角梯形，相邻行上相邻的两个像素单元组中，两个第一子像素301的直角腰相邻布置，两个第二子像素302的直角腰相邻布置，并且，两个第一子像素301的直角梯形的锐角朝向不同(一个朝上，另一个朝下)，两个第二子像素302的直角梯形的锐角朝向不同(一个朝上，另一个朝下)。相应的，如图19所示，蒸镀掩膜版的掩膜开口408的形状是由两个直角梯形结合在一起而形成的等腰梯形，所有行的掩膜开口朝向相同(即所有等腰梯形的排布方向相同)。
如图18所示，列方向上相邻的两个像素单元组300关于二者的边界对称分布(镜像对称分布)，同一行上的像素单元组300的排布相同。但在具体实施时，同一行上相邻的两个像素单元组300也可以排布不同，如图20所示，行方向和列方向上相邻的两个像素单元组300之间均为镜像对称分布。如此，相邻的四个像素单元组中的相邻的四个第一子像素301可采用蒸镀掩膜板上同一掩膜开口形成，相邻的四个像素单元组中的相邻的四个第二子像素302可采用蒸镀掩膜板上同一掩膜开口形成，通过共用一个掩模开口所产生的余量，可增加开口率或PPI。图21为对应图20的一种FMM的示意图。如图21所示，所述蒸镀掩膜版的掩膜开口408的形状是由四个直角梯形结合而形成的六边形，所述四个直角梯形的直角邻近布置。
以上实施例对本公开进行了详细说明，但应理解，上述描述仅是对本公开较佳实施例的描述，并非对本公开范围的任何限定，本公开领域的普通技术人员根据上述揭示内容做的任何变更、修饰，均属于权利要求书的保护范围。

Claims (18)

  1. 一种像素结构，其中，所述像素结构包括阵列排布的多个像素单元组，
    在每个所述像素单元组中，包括第一子像素、第二子像素以及第三子像素，所述第一子像素的靠近所述第三子像素的边与远离所述第三子像素的边互不平行，所述第二子像素的靠近所述第三子像素的边与远离所述第三子像素的边互不平行，
    至少两个相邻的所述像素单元组中的至少两个相邻的所述第一子像素和/或至少两个相邻的所述第二子像素采用蒸镀掩膜板上的同一掩膜开口形成。
  2. 如权利要求1所述的像素结构，其中，每个所述像素单元组包括两个第一子像素、两个第二子像素以及一个第三子像素，每个所述像素单元组包括至少两个由一个第一子像素、一个第二子像素以及一个第三子像素构成的像素单元，每个所述像素单元组中的像素单元均共用第三子像素。
  3. 如权利要求1所述的像素结构，其中，所述第一子像素、所述第二子像素以及所述第三子像素均为多边形结构。
  4. 如权利要求3所述的像素结构，其中，所述第一子像素和所述第二子像素的形状为直角梯形，所述第三子像素的形状为菱形或六边形，所述直角梯形的斜腰为所述靠近所述第三子像素的边，所述直角梯形的直角腰为所述远离所述第三子像素的边，所述像素单元组的形状为长方形或正方形。
  5. 如权利要求1至3中任一项所述的像素结构，其中，每个所述像素单元组中的第一子像素以及第二子像素分别排布在第三子像素周围，相邻行的所述像素单元组中的第三子像素错开排布。
  6. 如权利要求5所述的像素结构，其中，相邻行的所述像素单元组中的第三子像素错开半个所述像素单元组的距离。
  7. 如权利要求4所述的像素结构，其中，每个所述像素单元组中的第一子像素以及第二子像素分别排布在第三子像素周围，相邻行的所述像素单元组中的第三子像素错开排布，
    在相邻行的所述像素单元组中，相邻的所述第一像素的直角梯形的锐角朝向不同，相邻的所述第二像素的直角梯形的锐角朝向相同不同。
  8. 如权利要求1至3中任一项所述的像素结构，其中，每个所述像素单元组中的第一子像素以及第二子像素分别排布在第三子像素周围，相邻行的所述像素单元组中的第三子像素对齐排布，并且，在列和/或行方向上相邻的两个所述像素单元组关于二者的边界对称分布。
  9. 如权利要求4所述的像素结构，其中，每个所述像素单元组中的第一子像素以及第二子像素分别排布在第三子像素周围，相邻行的所述像素单元组中的第三子像素对齐排布，并且，在列和/或行方向上相邻的两个所述像素单元组关于二者的边界对称分布，
    在相邻行的所述像素单元组中，相邻的所述第一像素的直角梯形的锐角朝向相同，相邻的所述第二像素的直角梯形的锐角朝向相同。
  10. 如权利要求1至3中任一项所述的像素结构，其中，每个所述像素单元组中的第一子像素排布在所述第三子像素的一侧，每个所述像素单元组中的第二子像素排布在所述第三子像素的另一侧，相邻行的所述像素单元组中的第三子像素对齐排布，并且，在列和/或行方向上相邻的两个所述像素单元组关于二者的边界对称分布。
  11. 如权利要求1所述的像素结构，其中，所述第一子像素、所述第二子像素和所述第三子像素的颜色为红色、蓝色和绿色中的一种，并且，所述第一子像素、所述第二子像素、所述第三子像素的颜色互不相同。
  12. 一种OLED显示屏，其中，所述OLED显示屏包含如权利要求1至11中任一项所述的像素结构。
  13. 一种蒸镀掩膜版，其中，所述蒸镀掩膜版用以形成如权利要求1至11中任一项所述的像素结构。
  14. 如权利要求13所述的蒸镀掩膜版，其中，所述蒸镀掩膜版的掩膜开口是由至少两个直角梯形结合在一起而形成的多边形。
  15. 如权利要求14所述的蒸镀掩膜版，其中，所述蒸镀掩膜版的掩膜开口的形状是由两个直角梯形的下底边结合在一起而形成的六边形，所述两个直角梯形的锐角朝向不同，且相邻行上的掩膜开口错开排布。
  16. 如权利要求14所述的蒸镀掩膜版，其中，所述蒸镀掩膜版的掩膜开口的形状是两个直角梯形的下底边结合在一起而形成的五边形，所述两个直角梯 形的锐角朝向相同并形成掩膜开口的尖端，相邻行上的掩膜开口的尖端朝向不同，且相邻行上的掩膜开口错开排布。
  17. 如权利要求14所述的蒸镀掩膜版，其中，所述蒸镀掩膜版的掩膜开口的形状是由两个直角梯形结合在一起而形成的等腰梯形，且相邻行上的掩膜开口对齐排布。
  18. 如权利要求14所述的蒸镀掩膜版，其中，所述蒸镀掩膜版的掩膜开口的形状是由四个直角梯形结合在一起而形成的六边形，所述四个直角梯形的直角邻近布置。
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