WO2016045272A1 - Dispositif électroluminescent et son procédé de fabrication, substrat d'affichage et appareil d'affichage - Google Patents

Dispositif électroluminescent et son procédé de fabrication, substrat d'affichage et appareil d'affichage Download PDF

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Publication number
WO2016045272A1
WO2016045272A1 PCT/CN2015/071098 CN2015071098W WO2016045272A1 WO 2016045272 A1 WO2016045272 A1 WO 2016045272A1 CN 2015071098 W CN2015071098 W CN 2015071098W WO 2016045272 A1 WO2016045272 A1 WO 2016045272A1
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WO
WIPO (PCT)
Prior art keywords
electroluminescent
pixel
opening
same column
openings
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PCT/CN2015/071098
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English (en)
Chinese (zh)
Inventor
井口真介
廖金龙
高雪
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京东方科技集团股份有限公司
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Publication of WO2016045272A1 publication Critical patent/WO2016045272A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
    • H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
    • H01L33/24—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate of the light emitting region, e.g. non-planar junction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Definitions

  • the present invention relates to the field of display, and in particular to an electroluminescent device, a method of manufacturing the same, a display substrate, and a display device.
  • FIG. 1 is a plan view of a prior art electroluminescent device
  • FIG. 2 is a cross-sectional view taken along line AA of FIG. 1.
  • the electroluminescent device includes a substrate 1 and a substrate 1 formed thereon.
  • a pixel defining layer 2 is formed on the pixel defining layer 2, and the pixel opening matrix comprises a plurality of pixel openings 3, and each pixel opening 3 has the same shape and size, and all pixel openings in the same column 3 corresponds to an electroluminescent layer of the same color.
  • the electroluminescent material solution is often dripped by column coating, and then the electroluminescent material solution is dried.
  • the amount of the electroluminescent material solution that a part of the nozzles discharge into the corresponding column pixel opening is not equal to the preset amount.
  • the volume of the electroluminescent layer formed in the corresponding column is not equal to the reference volume.
  • the thicknesses of the electroluminescent layers in the partial columns are all too large or all are small (the thicknesses of the electroluminescent layers in the same column are equal).
  • the electroluminescent device When the electroluminescent device is applied to a display device, since a thickness of a portion of the electroluminescent layer is too large or small, a series of prominent stripe mura may appear in the display device, thereby Affect the user's visual effects.
  • the invention provides an electroluminescent device, a manufacturing method thereof, a display substrate and a display device.
  • the electroluminescent device does not produce a prominent stripe mura when emitting light, thereby improving the quality of the electroluminescent device.
  • the present invention provides an electroluminescent device comprising: a substrate and a pixel defining layer formed above the substrate, the pixel defining layer enclosing a pixel opening matrix, wherein the pixel opening matrix Each of the pixel openings is formed with an electroluminescent layer of a predetermined color.
  • the pixel opening matrix all of the pixel openings in the same column correspond to electroluminescent layers of the same color, and all of the pixels in the same column At least one pixel opening in the opening is not equal to the opening area of the other pixel openings.
  • the opening areas of each of the pixel openings in all of the pixel openings in the same column are not equal.
  • the ratio of the opening area of the pixel opening in all the pixel openings in the same column to the preset reference area is an area ratio a;
  • the area ratio a ranges from 0.98 ⁇ a ⁇ 1.02.
  • the area ratio a ranges from 0.995 ⁇ a ⁇ 1.005.
  • the ratio of the volume of the electroluminescent layer to the preset reference volume is a volume ratio b;
  • the volume ratio b ranges from 0.98 ⁇ a ⁇ 1.02.
  • the volume product ratio b ranges from 0.995 ⁇ a ⁇ 1.005.
  • At least one of the electroluminescent layers in all of the electroluminescent layers in the same column is unequal in thickness to the other of the electroluminescent layers.
  • the thickness of each of the electroluminescent layers in all of the electroluminescent layers in the same column is unequal.
  • a plurality of the pixel openings corresponding to the electroluminescent layers of the same color and having different opening areas are randomly distributed in the pixel opening matrix.
  • the present invention also provides a display substrate comprising: an electroluminescence device using the above electroluminescent device.
  • the present invention also provides a display device comprising: a display base
  • the display substrate is the display substrate described above.
  • the present invention also provides a method of fabricating an electroluminescent device, comprising:
  • the pixel defining layer Forming a pixel defining layer above the substrate, the pixel defining layer enclosing a matrix of pixel openings, all of the pixel openings in the same column corresponding to electroluminescent layers of the same color, at least all of the pixel openings in the same column There is one pixel opening that is not equal to the opening area of the other pixel openings;
  • An electroluminescent layer of a predetermined color is formed in each of the pixel openings in the matrix of pixel openings.
  • the opening areas of each of the pixel openings in all of the pixel openings in the same column are not equal.
  • the step of forming an electroluminescent layer of a predetermined color in each pixel opening in the pixel opening matrix comprises:
  • the electroluminescent material solution is dried to form the electroluminescent layer.
  • the step of forming an electroluminescent layer of a predetermined color in each pixel opening in the pixel opening matrix comprises:
  • the amount of dripping is not equal to the amount of dripping of the electroluminescent material solution in the other pixel openings;
  • the electroluminescent material solution is dried to form the electroluminescent layer.
  • the invention provides an electroluminescent device, a manufacturing method thereof, a display substrate and a display device.
  • the electroluminescent device comprises: a substrate and a pixel defining layer formed on the substrate, and a pixel opening matrix is formed on the pixel defining layer,
  • the pixel aperture matrix includes a plurality of images a pixel opening, an electroluminescent layer is formed in the pixel opening, and all of the pixel openings in the same column correspond to electroluminescent layers of the same color, and at least one pixel opening and other pixels are present in all of the pixel openings in the same column
  • the opening areas of the openings are not equal.
  • the present invention can make at least one pixel opening in all the pixel openings in the same column unequal with the opening areas of the other pixel openings, so that at least all of the electroluminescent layers in the same column in the electroluminescent device can be disposed.
  • the thickness of one electroluminescent layer is not equal to the thickness of the other electroluminescent layer, so that the brightness of the electroluminescent layer in the corresponding column is uneven when the light is emitted, thereby causing the stripe mura on the electroluminescent device to be lightened and improved.
  • the quality of the electroluminescent device is not equal to the thickness of the other electroluminescent layer, so that the brightness of the electroluminescent layer in the corresponding column is uneven when the light is emitted, thereby causing the stripe mura on the electroluminescent device to be lightened and improved.
  • FIG. 1 is a top plan view of a prior art electroluminescent device
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 3 is a top plan view of an electroluminescent device according to Embodiment 1 of the present invention.
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 3;
  • Figure 5 is a schematic diagram of a nozzle instilling electroluminescent material solution
  • Figure 6 is a flow chart showing a method of fabricating an electroluminescent device according to a fourth embodiment of the present invention.
  • the electroluminescent device includes: a substrate 1 and a pixel defining a layer 2, wherein the pixel defining layer 2 is formed above the substrate 1, and a pixel opening matrix is formed on the pixel defining layer 2, the pixel opening matrix includes a plurality of pixel openings 3, and the electroluminescent layer 4 is formed in the pixel opening 3. All of the pixel openings 3 in the same column correspond to the electroluminescent layer 4 of the same color, and at least one of the pixel openings 3 in the same column of the pixel openings 3 is not equal to the opening area of the other pixel openings 3.
  • the electroluminescent material solution is dripped by column coating.
  • the amount of the electroluminescent material solution corresponding to each of the pixel openings 3 in the same column is the same, after drying to change the electroluminescent material solution into the electroluminescent layer 4, all electroluminescent layers 4 in the same column are present.
  • At least one electroluminescent layer 4 is not equal in thickness to the other electroluminescent layers 4, and at this time, the thicknesses of all the electroluminescent layers 4 in the same column are not completely equal, so that the column of electroluminescent layers 4 is illuminated. The resulting brightness is not uniform.
  • the stripes mura in the electroluminescent device may be faded to a large extent.
  • the electroluminescent device is applied to a display device, since the dot mura region is relatively small, it is difficult to discern it by the naked eye, and thus does not affect the visual effect of the display device.
  • the opening areas of each of the pixel openings in the same column are not equal, and correspondingly, the thickness of each of the electroluminescent layers in all the electroluminescent layers in the same column is not equal. At this time, the probability that the electroluminescent device generates the stripe mura can be relatively reduced.
  • the aperture area of the pixel opening 3 forms an area ratio a with a reference area set in advance, and the area ratio a ranges from 0.98 ⁇ a ⁇ 1.02, that is, the change amount of the aperture area of each pixel opening 3 is
  • the reference area is between -2% and 2%.
  • the area ratio a ranges from 0.995 ⁇ a ⁇ 1.005, that is, the change amount of the opening area of each pixel opening 3 is between -0.5% and 0.5% of the reference area.
  • the above setting is to effectively reduce the stripe mura without affecting the display effect of the display device.
  • the opening areas of each of the pixel openings 3 in all the pixel openings 3 in the same column are not equal.
  • the thickness of each of the electroluminescent layers 4 in the entire column of the same column after the drying process is correspondingly performed are not equal.
  • At least one pixel opening 3 of all pixel openings 3 in the same column has different opening areas from other pixel openings 3, and is in the same At least one electroluminescent layer 4 in the entire electroluminescent layer 4 of the column is not equal in volume to the other electroluminescent layer 4. which is When the electroluminescent material solution is dripped by means of column coating, the amounts of the electroluminescent material solutions corresponding to each pixel opening 3 in the same column are not completely equal. At this time, it is also possible to realize that the thicknesses of all the electroluminescent layers 4 in the same column are not completely equal.
  • FIG. 5 is a schematic diagram of a nozzle instilling electroluminescent material solution, as shown in FIG. 5, the volume of the electroluminescent material solution dropped by the nozzle each time can be controlled by a voltage element, when a driving voltage is applied to the voltage element, The voltage elements are deformed to control the dripping of a volume of the electroluminescent material solution.
  • a voltage element when a driving voltage is applied to the voltage element, The voltage elements are deformed to control the dripping of a volume of the electroluminescent material solution.
  • the electroluminescent layer 4 is formed by a drying treatment. It should be noted that, in order to change the amount of dripping of the electroluminescent material solution in the pixel opening 3, the amount of change in the amount of dripping of the electroluminescent material solution in the pixel opening 3 cannot be excessively large in order to prevent the point mura from being highlighted.
  • the volume of the finally formed electroluminescent layer 4 forms a volume ratio b with a preset reference volume, and the volume ratio b ranges from 0.98 ⁇ b ⁇ 1.02. That is, the amount of change in the volume of each of the electroluminescent layers 4 is between -2% and 2% of the reference volume.
  • the volume ratio b ranges from 0.995 ⁇ b ⁇ 1.005, that is, the amount of change of the volume of each electroluminescent layer 4 is between -0.5% and 0.5% of the reference volume.
  • pixel openings corresponding to electroluminescent layers of the same color and having different opening areas are randomly distributed in the pixel opening matrix. At this time, the electroluminescent device generates stripes in the electroluminescent device. The probability can be relatively reduced.
  • Embodiment 1 of the present invention provides an electroluminescent device comprising: a substrate and a pixel defining layer formed on the substrate, and an image is formed on the pixel defining layer a pixel opening matrix comprising a plurality of pixel openings, wherein an electroluminescent layer is formed in the pixel opening, and all of the pixel openings in the same column correspond to electroluminescent layers of the same color, and all of the pixels in the same column At least one pixel opening in the opening is not equal to the opening area of the other pixel openings.
  • the present invention can make at least one pixel opening in all the pixel openings in the same column unequal with the opening areas of the other pixel openings, so that at least all of the electroluminescent layers in the same column in the electroluminescent device can be disposed.
  • the thickness of one electroluminescent layer is not equal to the thickness of the other electroluminescent layer, so that the brightness of the electroluminescent layer in the corresponding column is uneven when the light is emitted, thereby causing the stripe mura on the electroluminescent device to be lightened and improved.
  • the quality of the electroluminescent device is not equal to the thickness of the other electroluminescent layer, so that the brightness of the electroluminescent layer in the corresponding column is uneven when the light is emitted, thereby causing the stripe mura on the electroluminescent device to be lightened and improved.
  • a second embodiment of the present invention provides a display substrate.
  • the display substrate includes an electroluminescent device.
  • the electroluminescent device is the electroluminescent device provided in the first embodiment.
  • the display substrate includes the electroluminescent device of the first embodiment, the display substrate does not generate streaks mura when displayed, and the display effect of the corresponding display substrate is improved.
  • a third embodiment of the present invention provides a display device.
  • the display device includes a display substrate.
  • the display substrate is the display substrate provided in the second embodiment.
  • FIG. 6 is a flow chart of a method of fabricating an electroluminescent device according to Embodiment 4 of the present invention. As shown in FIG. 6, the manufacturing method includes:
  • Step 101 forming a pixel defining layer above the substrate, the pixel defining layer enclosing a pixel opening matrix, all pixel openings in the same column corresponding to the same color of the electroluminescent layer, and at least one pixel in all pixel openings in the same column The opening is not equal to the opening area of the other pixel openings.
  • the material of the pixel defining layer 2 is an insulating layer material.
  • the material of the pixel defining layer 2 is polyimide (Polyimide) as an example.
  • a polyimide film layer having a thickness of 1 to 10 um is formed on the substrate 1 by a coating process, and then a pixel opening matrix is formed on the polyimide film by a patterning process.
  • the polyimide film remaining on the substrate 1 is the pixel defining layer 2.
  • the pixel opening matrix comprises a plurality of pixel openings 3, and the regions in which the pixel openings 3 are located correspond to electro-optical a display area of the light emitting device, wherein the area covered with the polyimide film corresponds to a non-display area of the electroluminescent device, and further, in the pixel opening 3 formed by the patterning process, at least all of the pixel openings 3 in the same column exist One pixel opening 3 is not equal to the opening area of the other pixel openings 3.
  • the patterning process in this embodiment refers to at least a process of photoresist coating, exposure, development, etching, photoresist stripping, and the like.
  • step 101 optionally, the opening areas of each of the pixel openings in the same column are not equal.
  • Step 102 Form an electroluminescent layer of a predetermined color in each pixel opening in the pixel opening matrix.
  • step 102 includes:
  • Step 1021a The electroluminescent material solution is dripped into each pixel opening of the corresponding column by the ink jet device, and the amount of the electroluminescent material solution in each pixel opening of all the pixel openings in the same column is equal.
  • step 101 at least one pixel opening in all pixel openings in the same column is not equal to the opening area of the other pixel openings. Therefore, after step 1021a, at least one pixel opening exists in all pixel openings in the same column.
  • the height of the electroluminescent material solution within is not equal to the height of the electroluminescent material solution in the other pixel openings.
  • Step 1022a Drying the electroluminescent material solution to form an electroluminescent layer.
  • At least one electroluminescent layer in the same column has at least one electroluminescent layer and the other electroluminescent layers are not equal in thickness, so that the column of electroluminescent layer 4 is generated when the light is emitted.
  • the brightness is not uniform, although at this time some points mura may be generated in the electroluminescent device due to uneven brightness, the stripes mura in the electroluminescent device may be faded to a large extent.
  • the electroluminescent device is applied to a display device, since the spot mura region is relatively small, it is difficult to distinguish it by the naked eye, and thus does not affect the visual effect of the display device. The process ends.
  • step 102 includes:
  • Step 1021b using an inkjet device to inject electric current into each pixel opening of the corresponding column In the luminescent material solution, the amount of dripping of the electroluminescent material solution in the at least one pixel opening in all the pixel openings in the same column is not equal to the dripping amount of the electroluminescent material solution in the other pixel openings.
  • step 101 at least one pixel opening in all the pixel openings in the same column is not equal to the opening area of the other pixel openings, and in step 1021b, at least one pixel opening exists in all the pixel openings in the same column.
  • the amount of the electroluminescent material solution is not equal to the amount of the electroluminescent material solution in the other pixel openings, so the probability that the electroluminescent material solutions are not completely equal in all pixel openings in the same column will further Increase.
  • Step 1022b Drying the electroluminescent material solution to form an electroluminescent layer.
  • the probability that the heights of the electroluminescent layers are not completely equal in all the pixel openings in the same column will be further increased, so that the brightness of the column electroluminescent layer generated during illumination is not uniform, although At this time, some points mura may be generated in the electroluminescent device due to uneven brightness, but the stripes mura in the electroluminescent device may be faded to a large extent.
  • the electroluminescent device is applied to a display device, since the spot mura region is relatively small, it is difficult to distinguish it by the naked eye, and thus does not affect the visual effect of the display device. The process ends.
  • Embodiment 4 of the present invention provides a method for fabricating an electroluminescent device.
  • the electroluminescent device prepared by the manufacturing method at least one electroluminescent layer and at least one of the electroluminescent layers in the same column are present.
  • the thickness of the electroluminescent layer is not equal, so that the brightness of the electroluminescent layer in the corresponding column is uneven when the light is emitted, thereby causing the stripe mura on the electroluminescent device to be lightened, thereby improving the electroluminescent device. Quality.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

Dispositif électroluminescent et son procédé de fabrication, substrat d'affichage et appareil d'affichage, le dispositif électroluminescent comportant: un substrat (1) et une couche (2) définissant des pixels formée par-dessus le substrat (1), une matrice d'ouvertures de pixels formée sur la couche (2) définissant des pixels, ladite matrice d'ouvertures de pixels comportant une pluralité d'ouvertures (3) de pixels, et une couche électroluminescente (4) formée à l'intérieur des ouvertures (3) de pixels, l'épaisseur d'au moins une couche électroluminescente parmi toutes les couches électroluminescentes d'une colonne étant différente de celles des autres couches électroluminescentes. En faisant en sorte que l'épaisseur de ladite ou desdites couches électroluminescentes parmi toutes les couches électroluminescentes d'une colonne soit différente de celles des autres couches électroluminescentes, la luminance produite par les couches électroluminescentes dans la colonne correspondante lors de l'émission de lumière n'est pas uniforme, de sorte que le motif MURA sur le dispositif électroluminescent est estompé, améliorant la qualité du dispositif électroluminescent.
PCT/CN2015/071098 2014-09-25 2015-01-20 Dispositif électroluminescent et son procédé de fabrication, substrat d'affichage et appareil d'affichage WO2016045272A1 (fr)

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CN201410499304.7 2014-09-25
CN201410499304.7A CN104299983B (zh) 2014-09-25 2014-09-25 电致发光器件及其制造方法、显示基板和显示装置

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0376596A2 (fr) * 1988-12-27 1990-07-04 Hewlett-Packard Company Dispositif d'impression par jet d'encre de positions d'éléments d'image utilisant des buses multiples pour chaque élément d'image ou rangée d'éléments d'image
CN1162749A (zh) * 1996-02-16 1997-10-22 佳能株式会社 滤色器的制造方法和设备，滤色器，显示装置以及具有该显示装置的设备
CN1657981A (zh) * 2004-02-16 2005-08-24 精工爱普生株式会社 彩色滤光片的制法及其制造装置、电光学装置、电子仪器
CN101029943A (zh) * 2006-02-07 2007-09-05 应用材料股份有限公司 用于减少滤色片不规则性的方法和装置
CN103033991A (zh) * 2012-12-14 2013-04-10 京东方科技集团股份有限公司 一种基板、基板的形成方法以及液晶显示器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0376596A2 (fr) * 1988-12-27 1990-07-04 Hewlett-Packard Company Dispositif d'impression par jet d'encre de positions d'éléments d'image utilisant des buses multiples pour chaque élément d'image ou rangée d'éléments d'image
CN1162749A (zh) * 1996-02-16 1997-10-22 佳能株式会社 滤色器的制造方法和设备，滤色器，显示装置以及具有该显示装置的设备
CN1657981A (zh) * 2004-02-16 2005-08-24 精工爱普生株式会社 彩色滤光片的制法及其制造装置、电光学装置、电子仪器
CN101029943A (zh) * 2006-02-07 2007-09-05 应用材料股份有限公司 用于减少滤色片不规则性的方法和装置
CN103033991A (zh) * 2012-12-14 2013-04-10 京东方科技集团股份有限公司 一种基板、基板的形成方法以及液晶显示器

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CN104299983A (zh) 2015-01-21

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