WO2008068925A1 - 単一色el表示素子、単一色elバックライト、表示装置及び単一色el表示素子の製造方法 - Google Patents
単一色el表示素子、単一色elバックライト、表示装置及び単一色el表示素子の製造方法 Download PDFInfo
- Publication number
- WO2008068925A1 WO2008068925A1 PCT/JP2007/064696 JP2007064696W WO2008068925A1 WO 2008068925 A1 WO2008068925 A1 WO 2008068925A1 JP 2007064696 W JP2007064696 W JP 2007064696W WO 2008068925 A1 WO2008068925 A1 WO 2008068925A1
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- WIPO (PCT)
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- single color
- display element
- display
- color
- pixel
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/221—Applying luminescent coatings in continuous layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/17—Passive-matrix OLED displays
- H10K59/179—Interconnections, e.g. wiring lines or terminals
-
- 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
- H10K71/861—Repairing
Definitions
- Single color EL display element Single color EL backlight, display device, and method for manufacturing single color EL display element
- the present invention relates to a single color EL display element, a single color EL backlight, a display device, and a method for manufacturing a single color EL display element.
- a display device including an EL display element having a structure in which a voltage is applied by sandwiching an EL (electric aperture luminescence) layer between a pixel electrode, a counter electrode, and the like is known.
- a leak occurs between the upper and lower electrodes due to foreign matter or a pinhole generated in the EL layer, a large amount of current flows through the leaked portion.
- a sufficient voltage may not be applied to the EL layer, and the luminance of the display element may be reduced, and further light emission may not be achieved.
- Patent Document 1 discloses a method of correcting a display panel by burning a defective portion with a laser beam.
- Patent Document 1 JP-A-62-287596
- An object of the present invention is to correct display defects for each single pixel, and to satisfactorily suppress the occurrence of display defects in the entire display element due to local leaks between electrodes.
- a single color EL display element according to the present invention is electrically connected to a substrate, a plurality of signal lines provided on the substrate, and one of the corresponding signal lines by a connection wiring,
- the present invention is characterized in that a matrix is formed as a whole and includes a plurality of pixel electrodes provided apart from each other and a single color EL layer provided on the plurality of pixel electrodes.
- each pixel electrode is provided apart from each other, when a display defect location is detected, it is possible to correct the display defect only for the corresponding pixel electrode, The power S can be used to satisfactorily suppress the occurrence of display defects in the entire display device due to local inter-electrode leakage.
- the plurality of pixel electrodes are notched in portions overlapping the connection wirings in plan view!
- the insulating film of the display element expands to the upper electrode side or the pixel electrode dissolves by irradiating laser light more than necessary.
- the plurality of pixel electrodes are each formed with a notch in a portion overlapping the connection wiring in plan view. For this reason, it is possible to satisfactorily prevent the insulating film from expanding to the pixel electrode or dissolving the pixel electrode even when the connection wiring is irradiated with the laser beam.
- At least one insulating layer may be provided between the connection wiring and the pixel electrode.
- At least one insulating layer may be provided between the connection wiring and the single color EL layer.
- a single color EL backlight according to the present invention includes the above-described single color EL display element.
- a display device includes the above-described single color EL backlight and a display panel, and the pixel pitch of the single color EL display element in the single color EL backlight is equal to the pixel pitch of the display panel. It can be an integer multiple.
- a backlight of a display device there may be a large variation in luminance from pixel to pixel, or there may be a large number of defective display locations.
- brightness may be increased and decreased for each pixel, and moire may occur.
- the pixel pitch of the single color EL display element in the single color EL backlight is set to an integer multiple of the pixel pitch of the display panel, so that the color corresponding to each pixel of the display panel is reduced. The difference in luminance is eliminated and the occurrence of moire can be suppressed.
- a method for manufacturing a single color EL display device electrically connects a substrate, a plurality of signal lines provided on the substrate, and one of a plurality of corresponding signal lines by connection wiring.
- a single color EL display element comprising: a plurality of pixel electrodes connected to form a matrix as a whole and spaced apart from each other; and a single color EL layer provided on the plurality of pixel electrodes.
- the device preparation step the display failure location of the single color EL display element is detected, and the connection electrically connected to the pixel electrode corresponding to the display failure location detected in the failure location detection step And a defect location correcting step of irradiating the wiring with laser light to cut off the connection wiring and electrically disconnecting the signal line and the pixel electrode.
- FIG. 1 is a plan view of a single color EL display element 10 according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view taken along line IHI of the single color EL display element 10 of FIG.
- FIG. 3 is a plan view showing a laser light irradiation point 19 of the single color EL display element 10 according to Embodiment 1 of the present invention.
- FIG. 4 is a plan view of a single color EL display element 20 according to Embodiment 2 of the present invention.
- FIG. 5 is a cross-sectional view taken along the line V—V of the single color EL display element 20 of FIG.
- FIG. 6 is a plan view showing a laser light irradiation point 29 of a single color EL display element 20 according to Embodiment 2 of the present invention.
- FIG. 7 is a perspective view of a liquid crystal display device 30 according to Embodiment 3 of the present invention.
- FIG. 8 is a plan view of a pixel 44 of the color filter 40.
- FIG. 9 is a plan view of a pixel 34 of a single color EL backlight 31.
- FIG. 1 is a plan view of a single color EL display element 10 according to Embodiment 1 of the present invention
- FIG. 2 is a cross-sectional view of the single color EL display element 10 of FIG.
- a single color EL display element 10 includes an insulating substrate 11, a signal line 12, and an insulating film.
- a pixel electrode 14 a single color EL layer 15, an upper layer electrode 16, and the like.
- the insulating substrate 11 is made of, for example, glass (specifically, borosilicate glass or the like)!
- the constituent material of the insulating substrate 11 may be any material, but it is particularly preferable that the insulating substrate 11 is made of a light-transmitting material in order to transmit the substrate to the connection wiring to be corrected and irradiate the laser beam.
- the insulating film 13 is provided on the insulating substrate 11.
- the insulating film 13 is made of, for example, a photosensitive acrylic resin!
- a plurality of signal lines 12 are provided on the insulating film 13 so as to extend in parallel with each other.
- the signal line 12 is formed of, for example, a two-layer metal thin film such as titanium (Ti) / aluminum (A1).
- the signal line 12 has a connection wiring 17 formed in a direction extending toward the pixel electrode 14 in a plan view.
- the signal line 12 and the connection wiring 17 are integrally formed of the same material.
- the pixel electrode 14 is electrically connected to one of the corresponding signal lines 12 on the insulating substrate 11 through the connection wiring 17 to form a matrix as a whole and spaced apart from each other. Is provided.
- the pixel electrode 14 is electrically connected to the corresponding signal line 12 by a connection wiring 17 through a contact hole 18 formed in each insulating film 13. ing.
- the pixel electrode 14 is made of, for example, a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).
- the single color EL layer 15 is provided on the plurality of pixel electrodes 14. Where single color EL layer
- the light emitting layer used here may be a single layer, or may be a layer in which a plurality of layers are laminated so that a single color is obtained as a result of mixing red, blue and green light emission.
- the single color EL layer 15 includes, for example, an electron transport layer, an electron injection layer, a hole transport layer, a hole injection layer, a light emitting layer, and the like.
- the monochromatic EL layer 15 may be an organic EL light emitting layer or an inorganic EL light emitting layer.
- the upper layer electrode 16 is provided on the single color EL layer 15.
- the upper electrode 16 is made of, for example, aluminum (A1), silver (Ag), or the like!
- the manufacturing method shown below is merely an example, and the present invention is not limited to this.
- a Ti / Al film is formed to a thickness of about 50/100 nm on an insulating substrate 11 made of glass or the like.
- the Ti / Al film can be formed, for example, by sputtering.
- the signal line 12 is formed by patterning the obtained Ti / Al film into a predetermined shape using a photolithography method or the like.
- a photosensitive acrylic resin film is applied on the insulating substrate 11 and the signal line 12 to a thickness of about 2 m by a spin coating method or the like, and a pattern is formed by using a photolithography method or the like. Insulating film 13 is formed. At this time, the contact hole 18 is formed in a part of the insulating film 13 corresponding to the connection wiring.
- an ITO film or the like is formed on the insulating film 13 by a sputtering method or the like so as to have a thickness of about lOOnm, and then patterned by a photolithography method or the like, so that the entire matrix is obtained.
- a plurality of pixel electrodes 14 are formed so as to constitute a tassel and are spaced apart from each other.
- the plurality of pixel electrodes 14 are formed so as to be connected to the corresponding connection wirings 17 through the contact holes 18 of the insulating film 13.
- a single color EL layer 15 is formed on the pixel electrode 14 and the insulating substrate 11 by, for example, vapor deposition. Therefore, it is formed to a thickness of about 1 OOnm.
- an upper electrode 16 was formed on the single color EL layer 15 by, for example, forming an A1 film to a thickness of about lOOnm by sputtering or the like.
- connection wiring 17 that is electrically connected to the pixel electrode 14 corresponding to the display defect point specified by the detection device or the like is specified.
- the back surface side (insulating substrate 11 side) force of the single color EL display element 10 is also irradiated with the YAG laser beam 50 having a wavelength of, for example, about 550 nm, as shown in FIG. To do.
- the connection wiring 17 irradiated with the YAG laser light is burned off at the laser light irradiation point 19, and only the pixel electrode 14 corresponding to the display defect is electrically disconnected from the signal line 12, thereby causing a display defect. It is solved well.
- FIG. 4 is a plan view of the single color EL display element 20 according to Embodiment 2 of the present invention
- FIG. 5 is a cross-sectional view of the single color EL display element 20 of FIG.
- the single color EL display element 20 according to the present embodiment is different from the single color EL display element 10 according to the above-described first embodiment only in the shape of the pixel electrode 24, and the manufacturing method thereof is the same. .
- the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- a notch 25 is formed in a portion overlapping the connection wiring 17 in the plurality of pixel electrodes 24 in plan view.
- the cutout 25 may have any shape, for example, a polygonal shape, a circular shape, or an elliptical shape.
- the notch 25 is formed on the pixel electrode 24 so as to prevent the pixel electrode 24 from being damaged by the laser beam irradiated when correcting the display defect.
- the display defect correcting method for the single color EL display element 20 according to the second embodiment is the same as that of the first embodiment. Similarly, a single color EL display element 20 is prepared, and a display defect portion is detected. Next, the connection wiring 17 that is electrically connected to the pixel electrode 24 corresponding to the detected display defect portion is specified. Next, as shown in FIG. 6, the YAG laser light 50 having a wavelength of about 550 nm, for example, is applied to the specified connection wiring 17 on the back surface side (insulating substrate 11 side) of the single color EL display element 20. At this time, the YAG laser light is irradiated to a position corresponding to the notch 25 of the pixel electrode 24 in the connection wiring 17.
- connection wiring 17 irradiated with the YAG laser light is burned off at the laser light irradiation point 29, so that only the pixel electrode 24 corresponding to the display defect is electrically disconnected from the signal line 12, and the display defect is improved. It will be resolved.
- FIG. 7 is a perspective view of a liquid crystal display device 30 according to Embodiment 3 of the present invention.
- the liquid crystal display device 30 includes a single color EL knock light 31 including the single color EL display element 10 according to the first embodiment and a liquid crystal display panel 32.
- the liquid crystal display panel 32 includes a color filter 40 in which, for example, red 41, green 42, and blue 43 pixel regions are arranged in a matrix.
- each pixel region of red 41, green 42, and blue 43 is collected and defined as one pixel 44.
- the pixel pitch a of the liquid crystal display panel 32 is 300 Hm in the vertical and horizontal directions.
- the liquid crystal display device 30 is modularized by superimposing the liquid crystal display panel 32 and the single color EL backlight 31 having different pixel pitches, and one pixel of the single color EL backlight 31 has a liquid crystal display panel. Two 32 pixels are facing each other.
- the liquid crystal display device is illustrated as the display device.
- the present invention is not limited to this, and other display devices may be used.
- the picture elements of the liquid crystal display panel 32 are not limited to red, green, and blue, and may be other colors, and may not be three colors.
- the single color EL backlight 31 is a substitute for the single color EL display element 10 according to the first embodiment.
- a single color EL display element 20 according to Embodiment 2 is provided!
- the single-color EL display elements 10 and 20 according to Embodiments 1 and 2 of the present invention were corrected in the same manner as in the above-described embodiment.
- the single-color EL display elements 10 and 20 according to the present embodiment one having a vertical c′′b ′ pitch force of 600 ⁇ 111 ⁇ 300 am for each pixel was prepared.
- the single color EL display elements 10 and 20 according to the present embodiment can separate the pixel to be corrected without causing a leak between the pixel electrodes 14 and 24 and the upper layer electrode 16, respectively. In other words, it was possible to increase the luminance of the light emission other than the defective display area.
- the single color EL display element 10 includes an insulating substrate 11, a plurality of signal lines 12 provided on the insulating substrate 11, and one of the corresponding signal lines 12, respectively. And a plurality of pixel electrodes 14 provided as a whole and spaced apart from each other, and a single color EL layer 15 provided on the plurality of pixel electrodes 14. It is characterized by that.
- the present invention is useful for a single color EL display element, a single color EL backlight, a display device, and a method for manufacturing a single color EL display element.
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- Electroluminescent Light Sources (AREA)
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/517,618 US8432096B2 (en) | 2006-12-05 | 2007-07-26 | Single-color EL element, single-color EL backlight, display device, and method for manufacturing single-color EL element |
CN2007800449860A CN101558685B (zh) | 2006-12-05 | 2007-07-26 | 单色el显示元件、单色el背光源、显示装置和单色el显示元件的制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-328342 | 2006-12-05 | ||
JP2006328342 | 2006-12-05 |
Publications (1)
Publication Number | Publication Date |
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WO2008068925A1 true WO2008068925A1 (ja) | 2008-06-12 |
Family
ID=39491838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/064696 WO2008068925A1 (ja) | 2006-12-05 | 2007-07-26 | 単一色el表示素子、単一色elバックライト、表示装置及び単一色el表示素子の製造方法 |
Country Status (3)
Country | Link |
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US (1) | US8432096B2 (ja) |
CN (1) | CN101558685B (ja) |
WO (1) | WO2008068925A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8810503B2 (en) | 2009-04-15 | 2014-08-19 | Dolby Laboratories Licensing Corporation | Thin displays having spatially variable backlights |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0381735A (ja) * | 1989-08-25 | 1991-04-08 | Fujitsu Ltd | アクティブマトリクス型液晶表示パネル |
JP2001237082A (ja) * | 2000-02-21 | 2001-08-31 | Fuji Electric Co Ltd | 有機薄膜発光ディスプレイおよびその修復方法 |
JP2005241776A (ja) * | 2004-02-25 | 2005-09-08 | Canon Inc | 表示素子の製造、駆動方法 |
JP2006048027A (ja) * | 2004-07-09 | 2006-02-16 | Semiconductor Energy Lab Co Ltd | 表示装置 |
JP2006073370A (ja) * | 2004-09-02 | 2006-03-16 | Hitachi Displays Ltd | 液晶表示装置および光源 |
JP2007140513A (ja) * | 2005-11-15 | 2007-06-07 | Samsung Electronics Co Ltd | 両面表示装置 |
JP2007157418A (ja) * | 2005-12-02 | 2007-06-21 | Seiko Epson Corp | 有機el装置および有機el装置の製造方法ならびに電子機器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62287596A (ja) | 1986-06-04 | 1987-12-14 | コ−ア株式会社 | エレクトロルミネツセンスパネルの製造方法 |
KR920006894A (ko) * | 1990-09-27 | 1992-04-28 | 쓰지 하루오 | 액티브 매트릭스 표시장치 |
KR100845724B1 (ko) * | 1999-12-22 | 2008-07-14 | 소니 가부시끼 가이샤 | 유기 전계 발광 디스플레이 |
JP4032696B2 (ja) * | 2001-10-23 | 2008-01-16 | 日本電気株式会社 | 液晶表示装置 |
KR100478759B1 (ko) * | 2002-08-20 | 2005-03-24 | 엘지.필립스 엘시디 주식회사 | 유기전계 발광소자와 그 제조방법 |
US7554260B2 (en) * | 2004-07-09 | 2009-06-30 | Semiconductor Energy Laboratory Co., Ltd. | Display device provided with a conductive film connection between a wiring component and a metal electrode film |
-
2007
- 2007-07-26 CN CN2007800449860A patent/CN101558685B/zh not_active Expired - Fee Related
- 2007-07-26 US US12/517,618 patent/US8432096B2/en active Active
- 2007-07-26 WO PCT/JP2007/064696 patent/WO2008068925A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0381735A (ja) * | 1989-08-25 | 1991-04-08 | Fujitsu Ltd | アクティブマトリクス型液晶表示パネル |
JP2001237082A (ja) * | 2000-02-21 | 2001-08-31 | Fuji Electric Co Ltd | 有機薄膜発光ディスプレイおよびその修復方法 |
JP2005241776A (ja) * | 2004-02-25 | 2005-09-08 | Canon Inc | 表示素子の製造、駆動方法 |
JP2006048027A (ja) * | 2004-07-09 | 2006-02-16 | Semiconductor Energy Lab Co Ltd | 表示装置 |
JP2006073370A (ja) * | 2004-09-02 | 2006-03-16 | Hitachi Displays Ltd | 液晶表示装置および光源 |
JP2007140513A (ja) * | 2005-11-15 | 2007-06-07 | Samsung Electronics Co Ltd | 両面表示装置 |
JP2007157418A (ja) * | 2005-12-02 | 2007-06-21 | Seiko Epson Corp | 有機el装置および有機el装置の製造方法ならびに電子機器 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8810503B2 (en) | 2009-04-15 | 2014-08-19 | Dolby Laboratories Licensing Corporation | Thin displays having spatially variable backlights |
Also Published As
Publication number | Publication date |
---|---|
CN101558685B (zh) | 2011-08-10 |
CN101558685A (zh) | 2009-10-14 |
US20100073910A1 (en) | 2010-03-25 |
US8432096B2 (en) | 2013-04-30 |
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