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WO2005106573A1 - Écran à cristaux liquides et processus de fabrication de celui-ci - Google Patents

Écran à cristaux liquides et processus de fabrication de celui-ci Download PDF

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Publication number
WO2005106573A1
WO2005106573A1 PCT/JP2004/006300 JP2004006300W WO2005106573A1 WO 2005106573 A1 WO2005106573 A1 WO 2005106573A1 JP 2004006300 W JP2004006300 W JP 2004006300W WO 2005106573 A1 WO2005106573 A1 WO 2005106573A1
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WO
WIPO (PCT)
Prior art keywords
electrode
liquid crystal
organic
insulating film
layer
Prior art date
Application number
PCT/JP2004/006300
Other languages
English (en)
Japanese (ja)
Inventor
Masaya Nakayama
Masaru Kinoshita
Original Assignee
Fuji Photo Film Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co., Ltd. filed Critical Fuji Photo Film Co., Ltd.
Priority to PCT/JP2004/006300 priority Critical patent/WO2005106573A1/fr
Priority to TW093112448A priority patent/TWI251700B/zh
Publication of WO2005106573A1 publication Critical patent/WO2005106573A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8051—Anodes
    • H10K59/80516—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines

Definitions

  • the present invention relates to a liquid crystal display device using a so-called organic EL lighting device as a backlight of a liquid crystal cell, and a method for manufacturing the same.
  • Liquid crystal display devices are used in monitors, notebook computers, mobile phones, televisions, etc., and are widely used as representatives of flat panel displays. Since a liquid crystal cell is a non-light emitting element that does not emit light, a light source called a backlight that normally illuminates the liquid crystal cell from the backside is required.
  • the most commonly used backlight is a so-called light guide system comprising a fluorescent tube and a light guide for turning light emitted from the fluorescent tube into a surface light source. .
  • this light guide method requires a certain thickness (about three times that of the liquid crystal cell) to obtain uniform surface light emission, making it difficult to reduce the overall thickness of the liquid crystal display device. Was.
  • an organic EL lighting device using an organic EL device as a surface light emitting device is very effective as a backlight for a liquid crystal display device because it can be made very thin.
  • FIG. 9 is a schematic cross-sectional view showing one configuration example of a conventional organic EL lighting device.
  • an anode 102 made of a transparent electrode such as ITO is formed on a transparent substrate 101 made of glass or the like, and an organic EL layer 103 containing an organic luminescent material is further formed thereon.
  • Cathodes 104 made of a metal having a small work function such as L i, Mg and A 1 are sequentially laminated, and a sealing plate 105 made of glass or the like is further provided for protection from the outside air such as moisture and oxygen. It is bonded and sealed in a dry nitrogen atmosphere using a transparent substrate 101 and an adhesive 106.
  • Patent Document 1 discloses a technique for reducing the resistance of a transparent electrode by using a low-resistance auxiliary electrode made of metal.
  • the metal since the metal has light impermeability in the visible light castle, the metal is shielded from light by the luminescent capture electrode, and the brightness of the organic EL lighting device is reduced.
  • Patent Document 2 This is a method in which an auxiliary electrode is provided in a portion of the liquid crystal display device other than the region where the display pixel electrode is formed, that is, in a portion that does not directly affect display. With this configuration, since the auxiliary electrode is provided at the light-impermeable portion of the liquid crystal display device, the decrease in brightness due to the light blocking of the auxiliary electrode is effectively eliminated in the entire liquid crystal display device.
  • the metal material usually has poor surface flatness compared to ITO, so that a short circuit may occur between the auxiliary electrode and the cathode or a leak may occur between the two.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2000-2000
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2000-15056 633
  • the present invention has been made in view of the above-described problems, and achieves low power consumption by improving the luminous efficiency of an organic EL lighting device, and generates a short circuit between an auxiliary electrode and a second electrode. It is an object of the present invention to provide a liquid crystal display device having an organic EL lighting device with low power consumption and high reliability and capable of emitting clean uniform light, and a method of manufacturing the same.
  • a liquid crystal display device includes a liquid crystal cell having a liquid crystal layer, a plurality of display pixels formed thereon, and an organic EL layer for illuminating the liquid crystal cell from behind a first electrode.
  • the insulating film is formed on the first electrode so as to cover at least an upper surface of the auxiliary electrode.
  • the insulating film may be formed on the first electrode so as to cover the entire surface of the trapping electrode.
  • the method for manufacturing a liquid crystal display device includes a step of sequentially forming a first electrode, which is a transparent electrode, an electrode material and an insulating resin on a surface of a transparent substrate, and processing the insulating resin by lithography. Forming an electrode-shaped insulating film; processing the electrode material using the insulating film as a mask to pattern an auxiliary electrode; and forming the auxiliary electrode on the first electrode via the insulating film.
  • Another aspect of the method for manufacturing a liquid crystal display device of the present invention includes a step of sequentially forming a first electrode, which is a transparent electrode, and an electrode material on a surface of a transparent substrate; Forming an insulating material on the first electrode so as to cover the auxiliary electrode; processing the insulating material to cover the auxiliary electrode according to the shape of the auxiliary electrode Forming a pattern, and sequentially forming an organic EL layer and a second electrode which is a metal electrode on the first electrode so as to cover the auxiliary electrode via the insulating film.
  • Another aspect of the method for manufacturing a liquid crystal display device of the present invention includes a step of patterning an auxiliary electrode on a surface of a transparent substrate, and a first step of forming a transparent electrode on the transparent substrate so as to cover the auxiliary electrode.
  • FIG. 1A and 1B are schematic plan views showing the configuration of the liquid crystal display device according to the first embodiment.
  • FIG. 1C is a schematic cross-sectional view along the line II of FIG. 1B.
  • FIG. 2 is a schematic cross-sectional view illustrating a configuration of an organic EL lighting device that is a component of the liquid crystal display device according to the first embodiment.
  • FIG. 3 is a schematic cross-sectional view showing the configuration of a comparative example (conventional example) of an organic EL lighting device used for a backlight of a liquid crystal display device.
  • 4A to 4F are schematic cross-sectional views illustrating a method for manufacturing the liquid crystal display device according to the first embodiment in the order of steps.
  • FIG. 5 is a schematic cross-sectional view illustrating a configuration of an organic EL lighting device that is a component of a liquid crystal display device according to a modification of the first embodiment.
  • 6A to 6G are schematic cross-sectional views illustrating a method for manufacturing a liquid crystal display according to a modification of the first embodiment in the order of steps.
  • FIG. 7 is a schematic cross-sectional view illustrating a configuration of an organic EL lighting device that is a component of the liquid crystal display device according to the second embodiment.
  • FIGS. 8A to 8G are schematic cross-sectional views illustrating a method for manufacturing the liquid crystal display device according to the second embodiment in the order of steps.
  • FIG. 9 is a schematic cross-sectional view showing one configuration example of a conventional organic EL lighting device.
  • FIG. 1A and 1B are schematic plan views showing the configuration of the liquid crystal display device according to the present embodiment
  • FIG. 1C is a schematic cross-sectional view along the line I-I in FIG. 1B
  • FIG. 2 is a schematic cross-sectional view illustrating a configuration of an organic EL lighting device that is a component of the liquid crystal display device according to the present embodiment.
  • the liquid crystal display device 1 of the present embodiment includes a liquid crystal cell 2 as a display means and an organic EL lighting device 3 used as a backlight of the liquid crystal cell 2. ing.
  • the liquid crystal cell 2 has a plurality of strip-shaped transparent electrodes 11 made of ITO or the like formed on the surface thereof, and an alignment film 12 formed on the transparent electrodes 11.
  • a polarizing plate 19 is arranged on the back surface of 16 respectively.
  • the transparent electrode 11 and the transparent electrode 14 are orthogonal to each other, the transparent electrode 11 and the transparent electrode 14 overlap each other via the liquid crystal layer 1.7 and the like.
  • a plurality of display pixel electrodes (apertures) 10 are formed from the portions indicated by.
  • liquid crystal cell is described as a simple matrix type in the text, an active matrix type liquid crystal cell provided with a switching element such as a thin film transistor (TFT) in a pixel portion is also described. This is applicable in the configuration of the present invention.
  • TFT thin film transistor
  • the organic EL lighting device 3 is, as shown in FIG. 2, a third transparent substrate made of glass or the like.
  • An anode 22 which is a transparent electrode made of ITO or the like is formed on the surface of the auxiliary electrode 23, and an auxiliary electrode 23 is patterned on the anode 22, and an insulating film 2 is formed so as to cover the upper surface of the auxiliary electrode 23.
  • an organic EL layer 25 and a cathode 26 as a metal electrode are sequentially formed on the anode 22 so as to cover the auxiliary electrode 23 and the insulating film 24, and are made of a barrier oxide or the like.
  • a sealing plate 28 is provided above the cathode 26 via a hygroscopic material 27, and the sealing plate 28 is fixed by an adhesive (not shown).
  • the capture electrodes 23 are arranged in a region other than the display pixel electrode 10, in other words, in a portion matching the non-formation region of the display surface element electrode 10, that is, arranged in a matrix as shown in FIGS. 1A and 1B.
  • the display pixel electrodes 10 are provided in a lattice shape and are made of a metal such as aluminum, silver, chromium, or molybdenum.
  • the insulating film 24 is made of an insulating inorganic material such as silicon oxide or a photosensitive resin material such as polyimide, and is made of the latter here.
  • the upper surface of the auxiliary electrode 23 is formed in a shape following the auxiliary electrode 23.
  • the insulating film 24 separates the upper surface of the auxiliary electrode 23 from the organic EL layer 25, and the auxiliary electrode 23 and the organic EL layer 25 are located above the auxiliary electrode 23. Insulated with
  • FIG. 3 is a schematic cross-sectional view showing a configuration of a comparative example (conventional example) of an organic EL lighting device used as a backlight of a liquid crystal display device.
  • the organic EL layer 25 is formed directly so as to cover the auxiliary electrode 23 without the insulating film 24 as in the present embodiment.
  • the organic EL layer 25 has a two-layer structure of a hole transport layer / organic light emitting layer from the anode 22 side, and There are three-layer structure of a hole transport layer, an organic light-emitting layer, and an electron transport layer, or a four-layer structure of a hole injection layer, a hole transport layer, an organic light-emitting layer, and an electron transport layer.
  • a hole transport layer there is a two-layer organic EL layer using ⁇ -NPD as a hole transport layer and Alq as an organic light emitting layer.
  • the device having this configuration emits green light.
  • organic EL elements having various luminescent colors can be formed.
  • the cathode 26 is made of an alkali metal such as lithium and an alkali metal compound such as lithium fluoride, which have a small work function, to effectively inject electrons into the organic EL layer 25.
  • aluminum monolithium alloy, lithium fluoride / aluminum two-layer birch is used as the cathode 26.
  • the sealing plate 28 is made of glass or the like, and is used in a dry nitrogen atmosphere using the third transparent substrate 21 and, for example, an epoxy resin adhesive to protect the organic EL layer 25 from the outside air. And sealed.
  • the liquid crystal cell 2 and the organic EL lighting device 3 face each other, and the polarizing plate 18 of the liquid crystal cell 2 and the third transparent substrate 21 of the organic EL lighting device 3 face each other.
  • the grid-like auxiliary electrodes 23 are aligned between the matrix-arranged display pixel electrodes 10 which are regions where the display pixel electrodes 10 are not formed.
  • the liquid crystal display device 1 is configured.
  • FIGS. 4A to 4F are schematic cross-sectional views showing the method for manufacturing the liquid crystal display device according to the above-described present embodiment in the order of steps.
  • the manufacturing process of the organic EL lighting device which is the main configuration of the liquid crystal display device according to the present embodiment, will be mainly described.
  • an anode 22 made of ITO or the like is formed on a third transparent substrate 21 made of glass or the like, and an electrode material such as aluminum is formed on the anode 22.
  • the polyimide film 32 is exposed and developed by photolithography, and the polyimide film 32 is processed to form an insulating film 24 as a pattern.
  • the A1 film 31 is dry-etched using the insulating film 24 as a mask to form a pattern of auxiliary electrodes 2 and 3 following the shape of the insulating film 24.
  • the auxiliary electrode 23 is formed so as to be located at a position matching the non-formation region of the display pixel electrode 10 when superimposed on the liquid crystal cell 2.
  • an organic EL layer 25 is formed on the anode 22 by an evaporation method so as to cover the insulating film 24 and the auxiliary electrode 23.
  • 2TNTATA as a hole injection layer
  • ⁇ —NPD as a hole transport layer
  • Alq as a light emitting layer
  • a cathode 26 is formed on the organic EL layer 25 by depositing LiF to a thickness of 0.5 nm and A1 to a thickness of 200 nm.
  • a third gas is applied with an epoxy resin adhesive under a dry nitrogen atmosphere.
  • the sealing is performed by bonding the glass substrate 21 and the sealing plate 28.
  • the organic EL lighting device 3 for backlight of the present embodiment is completed.
  • the organic EL lighting device 3 emits green light.
  • the liquid crystal cell 2 is manufactured by a known method. For example, a plurality of strip-shaped transparent electrodes 11 made of ITO or the like are patterned on the surface of a first transparent substrate 13 made of glass or the like, and then an alignment film 1 is formed so as to cover the transparent electrodes 11. After forming a plurality of strip-shaped transparent electrodes 14 made of ITO or the like and orthogonal to the transparent electrodes 11 on the surface of the second transparent substrate 16 made of glass or the like, the transparent electrodes 1 An alignment film 15 is formed so as to cover 4.
  • the first and second transparent substrates 13 and 16 are connected to the transparent electrode 11 and the transparent electrode 11 through a spacer for controlling the thickness of the injected liquid crystal. 1 and 4 are orthogonally opposed to each other and bonded together. A crystal layer 17 is formed. Finally, polarizing plates 18 and 19 are formed on the back surfaces of the first and second transparent substrates 13 and 16. As shown by a circle C in the figure, a portion where the strip-shaped transparent electrodes 11 and 13 orthogonal to each other overlap is the display pixel electrode 10.
  • the liquid crystal cell 2 and the organic EL lighting device 3 are connected to each other, and the polarizing plate 18 of the liquid crystal cell 2 and the third transparent substrate 21 of the organic EL lighting device 3 face each other.
  • the liquid crystal display device 1 is completed by overlapping and fixing the lattice-shaped trapping electrodes 23 between the display pixel electrodes 10 arranged in a matrix, which is a formation region, so as to be aligned. In order to perform this superposition step reliably, it is desirable to provide an alignment mark at an appropriate portion of each of the liquid crystal cell 2 and the organic EL lighting device 3.
  • the auxiliary electrode 23 made of a metal material is provided on the anode 22 that is a transparent electrode, the resistance value of the anode 22 can be reduced.
  • a reliable OLED lighting device 3 for backlight which can prevent light emission unevenness and heat generation due to a voltage drop and achieve clean uniform light emission, is realized.
  • the auxiliary electrode 23 is provided in a region where the display pixel electrode 10 of the liquid crystal cell 2 is not formed, a decrease in luminance of the organic EL lighting device 3 due to the light shielding of the auxiliary electrode 23 is suppressed.
  • the insulating film 24 is formed on the trapping electrode 23, no current flows through the organic EL layer 25 in a portion of the organic EL layer 25 that is shielded from light by the auxiliary electrode 23. Low power consumption of lighting equipment is realized. Further, by forming the insulating film 24, it is possible to prevent short-circuit and leakage between the trapping electrode 23 and the cathode 26 due to poor flatness of the auxiliary electrode 23. As described above, a liquid crystal display device having an organic EL lighting device with high reliability and low power consumption capable of emitting clean uniform light is realized.
  • FIG. 5 is a schematic cross-sectional view illustrating a configuration of an organic EL lighting device that is a component of the liquid crystal display device according to the present modification.
  • the liquid crystal display device of this modification (the liquid crystal display device 41 shown in FIG. 6G) includes a liquid crystal cell 2 similar to the first embodiment, which is a liquid crystal cell, and an organic EL used as a backlight of the liquid crystal cell 2.
  • the lighting device 42 is provided.
  • an anode 22 which is a transparent electrode made of IT, etc. is formed on the surface of a third transparent substrate 21 made of glass or the like, and a trapping electrode 23 is formed on the anode 22 in a pattern.
  • An insulating film 43 is formed so as to cover the entire surface of the auxiliary electrode 23, and an organic EL layer 25 and a cathode 26 which is a metal electrode are sequentially formed on the anode 22 so as to cover the insulating film 43.
  • a sealing plate 28 is provided above the cathode 26 via a hygroscopic material 27 made of a barrier oxide or the like, and the sealing plate 28 is fixed by an adhesive (not shown). ing.
  • the insulating film 43 is made of an insulating inorganic material such as silicon oxide or a photosensitive resin material such as polyimide. In this case, the former is used as the material, and the trapping electrode 23 is shaped like the auxiliary electrode 23. This insulating film 43 separates the trapping electrode 23 from the organic EL layer 25, and insulates the trapping electrode 23 from the organic EL layer 25. ing.
  • the insulating film 43 is formed so as to cover the entire surface of the auxiliary electrode 23, and the trapping electrode 23 is insulated from the organic EL layer 25. Luminous efficiency can be improved. Furthermore, by forming the insulating film 43 so as to cover the entire surface of the auxiliary electrode 23, the auxiliary electrode 23 and the cathode 26 are separated by the insulating film 43 to ensure insulation. The above short leak is prevented.
  • FIGS. 6A to 6G are schematic cross-sectional views illustrating a method of manufacturing the liquid crystal display device according to the above-described modification in the order of steps.
  • the manufacturing process of the organic EL lighting device which is the main configuration of the liquid crystal display device according to the present modification, will be mainly described.
  • an anode 22 made of ITO or the like is formed on a third transparent substrate 21 made of glass or the like, and an electrode material such as aluminum (A) is formed on the anode 22.
  • an electrode material such as aluminum (A) is formed on the anode 22.
  • the auxiliary film 23 is patterned by patterning the A1 film 31 into an electrode shape. At this time, the auxiliary electrode 23 overlaps the liquid crystal cell 2 It is formed so as to be located at a position matching the non-formation region of the display pixel electrode 10 when they are combined.
  • a silicon oxide film 44 as an insulating inorganic material is formed on the anode 22 so as to cover the auxiliary electrode 23.
  • the silicon oxide film 44 is patterned in a shape following the auxiliary electrode 23, and an insulating film 43 covering the entire surface of the capture electrode 23 is patterned. .
  • an organic EL layer 25 is formed on the anode 22 by an evaporation method so as to cover the insulating film 43.
  • 2TNATA as a hole injection layer
  • a—NPD as a hole transport layer
  • Alq as a light emitting layer
  • a cathode 26 is formed on the organic EL layer 25 by depositing LiF to a thickness of 0.5 nm and Al to a thickness of 200 nm.
  • a third gas is applied with an epoxy resin adhesive under a dry nitrogen atmosphere.
  • the sealing is performed by bonding the glass substrate 21 and the sealing plate 28.
  • the organic EL lighting device 42 for backlight of the present modified example is completed.
  • the organic EL lighting device 42 emits green light.
  • the liquid crystal cell 2 is manufactured by a known method. For example, a plurality of strip-shaped transparent electrodes 11 made of ITO or the like are patterned on the surface of a first transparent substrate 13 made of glass or the like, and then an alignment film 1 is formed so as to cover the transparent electrodes 11. After forming a plurality of strip-shaped transparent electrodes 14 made of ITO or the like and orthogonal to the transparent electrodes 11 on the surface of the second transparent substrate 16 made of glass or the like, the transparent electrodes 1 An alignment film 15 is formed so as to cover 4.
  • the first and second transparent substrates 13 and 16 are connected to the transparent electrode 11 and the transparent electrode 11 through a spacer for controlling the thickness of the injected liquid crystal.
  • 14 are arranged so as to be orthogonal to each other and bonded together, and a liquid crystal is injected into the inside to form a liquid crystal layer 17.
  • polarizing plates 18 and 19 are formed on the back surfaces of the first and second transparent substrates 13 and 16. As shown by the circle C in the figure, stripes that are orthogonal to each other A portion where the transparent electrodes 11 and 13 overlap each other becomes a display pixel electrode 10.
  • the liquid crystal cell 2 and the organic EL lighting device 42 are connected to each other, and the polarizing plate 18 of the liquid crystal cell 2 and the third transparent substrate 21 of the organic EL lighting device 3 face each other.
  • a grid-like trapping electrode 23 is overlapped and fixed between the display pixel electrodes 10 arranged in a matrix shape, which is a formation area, so as to be aligned, and the liquid crystal display device 41 is completed. In order to surely perform this superposition step, it is desirable to provide an alignment mark at an appropriate portion of each of the liquid crystal cell 2 and the organic EL lighting device 42.
  • the auxiliary electrode 23 made of a metal material is provided on the anode 22 that is a transparent electrode, the resistance value of the anode 22 can be reduced.
  • An organic EL lighting device 42 for a backlight that can prevent light emission unevenness and heat generation due to a voltage drop and achieve clean uniform light emission is realized.
  • the auxiliary electrode 23 is provided in a region where the display pixel electrode 10 of the liquid crystal cell 2 is not formed, a decrease in luminance of the organic EL lighting device 42 due to light shielding of the capture electrode 23 is suppressed.
  • the insulating film 43 is formed so as to cover the entire surface of the auxiliary electrode 23, no current flows in a portion of the organic EL layer 25 shielded by the auxiliary electrode 23. Thus, low power consumption of the organic EL lighting device is realized. Further, by forming the insulating film 43, it is possible to prevent short-circuit and leakage between the auxiliary electrode 23 and the cathode 26 due to the poor flatness of the auxiliary electrode 23. As described above, a liquid crystal display device having an organic EL lighting device with high reliability and low power consumption capable of emitting clean uniform light is realized.
  • the present embodiment differs from the first embodiment in that the configuration of the organic EL lighting device of the liquid crystal display device is slightly different.
  • the same components as those of the liquid crystal display device according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • FIG. 7 is a schematic cross-sectional view illustrating the configuration of an organic EL lighting device that is a component of the liquid crystal display device according to the present embodiment.
  • the liquid crystal display device of the present embodiment (the liquid crystal display device 51 shown in FIG. 8G) includes a liquid crystal cell 2 similar to that of the first embodiment and an organic EL device used as a backlight of the liquid crystal cell 2.
  • L lighting device 52 is provided.
  • a trapping electrode 23 is pattern-formed on the surface of a third transparent substrate 21 made of glass or the like, and ITO is formed on the third transparent substrate 21 so as to cover the auxiliary electrode 23.
  • An anode 22 is formed as a transparent electrode made of the same material.
  • An insulating film 53 is formed on the anode 22 at a position aligned above the trapping electrode 23, and the anode 2 is formed so as to cover the insulating film 53.
  • An organic EL layer 25 and a cathode 26 serving as a metal electrode are sequentially formed on 2, and a sealing plate 28 is provided above the cathode 26 via a hygroscopic material 27 made of, for example, vacuum oxide. The sealing plate 28 is fixed by an adhesive (not shown).
  • the insulating film 53 is made of silicon oxide, positive photosensitive polyimide, or the like, and is shaped like the auxiliary electrode 23 so as to be aligned with the upper surface of the auxiliary electrode 23 via the anode 22.
  • the insulating film 43 separates the upper surface of the trapping electrode 23 from the organic EL layer 25.
  • the trapping electrode 23 and the organic EL layer 25 are located above the trapping electrode 23. Insulated.
  • an insulating film 53 is formed at a position aligned above the auxiliary electrode 23 to insulate the trapping electrode 23 from the organic EL layer 25, so that the organic EL lighting device 5 is formed. 2 can improve the luminous efficiency. Further, by forming the insulating film 53 at a position aligned above the trapping electrode 23, the trapping electrode 23 and the cathode 26 are separated by the insulating film 53 to ensure reliable insulation. And the short leak described above is prevented.
  • FIGS. 8A to 8G are schematic sectional views showing the method for manufacturing the liquid crystal display device according to the above-described present embodiment in the order of steps.
  • the manufacturing process of the organic EL lighting device which is the main configuration of the liquid crystal display device according to the present embodiment, will be mainly described.
  • an aluminum (A 1) film 31 is formed as an electrode material on a third transparent substrate 21 made of glass or the like, and then the A 1 film 31 is formed into an electrode shape.
  • the trapping electrode 23 is patterned to form a pattern.
  • the capture electrode 23 is formed so as to be located at a position matching the non-formation region of the display pixel electrode 10 when it is overlapped with the liquid crystal cell 2.
  • a positive electrode made of ITO or the like covers the auxiliary electrode 23.
  • Form pole 2 2 a positive electrode made of ITO or the like.
  • a positive photosensitive polyimide film 54 is applied on the anode 22 to form a film, and then the back surface of the transparent substrate 21 is irradiated with exposure light to form the auxiliary electrode 23.
  • the positive photosensitive polyimide film 54 is exposed and imaged by photolithography using the mask as a mask, and as shown in FIG. 8D, the positive photosensitive polyimide film 54 is processed to form an electrode.
  • An insulating film 53 is formed.
  • an organic EL layer 25 is formed on the anode 22 by an evaporation method so as to cover the insulating film 53.
  • 2 TNATA as the hole injection layer, ⁇ -NPD as the hole transport layer, and Alq as the light emitting layer are deposited from the anode 22 side, and the organic EL layer 25 is formed into a three-layer structure.
  • a cathode 26 is formed on the organic EL layer 25 by depositing LiF to a thickness of 0.5 nm and A1 to a thickness of 200 nm.
  • the liquid crystal cell 2 is manufactured by a known method. For example, a plurality of strip-shaped transparent electrodes 11 made of ITO or the like are patterned on the surface of a first transparent substrate 13 made of glass or the like, and then an alignment film 1 is formed so as to cover the transparent electrodes 11. After forming a plurality of strip-shaped transparent electrodes 14 made of ITO or the like and orthogonal to the transparent electrodes 11 on the surface of the second transparent substrate 16 made of glass or the like, the transparent electrodes 1 An alignment film 15 is formed so as to cover 4. '
  • the first and second transparent substrates 13 and 16 are connected to the transparent electrode 11 and the transparent electrode 11 through a spacer for controlling the thickness of the injected liquid crystal.
  • 14 are arranged so as to be orthogonal to each other and bonded together, and a liquid crystal is injected into the inside to form a liquid crystal layer 17.
  • polarizing plates 18 and 19 are formed on the back surfaces of the first and second transparent substrates 13 and 16. As shown by a circle C in the figure, a portion where the stripe-shaped transparent electrodes 11 and 13 orthogonal to each other overlap is the display pixel electrode 10.
  • the liquid crystal cell 2 and the organic EL lighting device 52 are opposed to each other, and the polarizing plate 18 of the liquid crystal cell 2 and the third transparent substrate 21 of the organic EL lighting device 3 face each other.
  • a grid-like trapping electrode 23 is overlapped and fixed between the display pixel electrodes 10 arranged in a matrix, which is a formation area, so as to be aligned, and a liquid crystal display device 51 is completed. In order to surely perform this superposition process, it is desirable to provide an alignment mark at an appropriate portion of each of the liquid crystal cell 2 and the organic EL lighting device 52.
  • the auxiliary electrode 23 made of a metal material is provided in the anode 22 which is a transparent electrode, so that the resistance value of the anode 22 can be reduced.
  • the capture electrode 23 is provided in a region where the display pixel electrode 10 of the liquid crystal cell 2 is not formed, a decrease in the brightness of the organic EL lighting device 52 due to the shielding of the capture electrode 23 is suppressed.
  • the insulating film 53 is formed above the auxiliary electrode 23, no current flows in the portion of the organic EL layer 25 that is shielded from light by the auxiliary electrode 23.
  • the low power consumption of the lighting device 52 is realized.
  • the insulating film 53 it is also possible to prevent short leakage between the auxiliary electrode 23 and the cathode 26 due to poor flatness of the auxiliary electrode 23.
  • a liquid crystal display device having an organic EL lighting device with high reliability and low power consumption capable of emitting clean uniform light is realized.
  • ADVANTAGE OF THE INVENTION According to this invention, the luminous efficiency of a backlight is improved, low power consumption is implement
  • a liquid crystal display device having a possible low power consumption organic EL lighting device is realized.

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  • Physics & Mathematics (AREA)
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  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
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  • Electroluminescent Light Sources (AREA)
  • Liquid Crystal (AREA)

Abstract

Un illuminateur EL organique (3) comprend en guise d'anode (22) une électrode transparente formée sur la surface d'un troisième support transparent (21), une électrode auxiliaire (23) modelée sur l'anode (22), un film isolant (24) formé pour couvrir la face supérieure de l'électrode auxiliaire (23), et une couche d'EL organique (25) et une cathode (26) séquentiellement formée sur l'anode (22) pour couvrir l'électrode auxiliaire (23) et le film isolant (24). Avec une telle structure, une faible consommation énergétique de l'illuminateur EL organique (3) est réalisée par hausse de l'efficacité d'émission, et un écran à cristaux liquides très fiable à faible consommation d'énergie capable d'émettre de la lumière nettement et uniformément peut être réalisé en évitant les courts-circuits ou les fuites entre l'électrode auxiliaire (23) et l'anode (22).
PCT/JP2004/006300 2004-04-30 2004-04-30 Écran à cristaux liquides et processus de fabrication de celui-ci WO2005106573A1 (fr)

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PCT/JP2004/006300 WO2005106573A1 (fr) 2004-04-30 2004-04-30 Écran à cristaux liquides et processus de fabrication de celui-ci
TW093112448A TWI251700B (en) 2004-04-30 2004-04-30 Liquid crystal display and process for fabricating the same

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WO2007102103A1 (fr) * 2006-03-09 2007-09-13 Philips Intellectual Property & Standards Gmbh Elements d'eclairage avec des electrodes segmentees
WO2009001241A1 (fr) * 2007-06-25 2008-12-31 Koninklijke Philips Electronics N.V. Dispositif fonctionnel organique et procédé de fabrication de celui-ci
DE102008045948A1 (de) * 2008-09-04 2010-03-11 Osram Opto Semiconductors Gmbh Verfahren zur Herstellung eines organischen strahlungsemittierenden Bauelements und organisches strahlungsemittierendes Bauelement
WO2010089680A1 (fr) * 2009-02-05 2010-08-12 Philips Intellectual Property & Standards Gmbh Dispositif électroluminescent
JP2011249075A (ja) * 2010-05-25 2011-12-08 Nec Lighting Ltd 有機エレクトロルミネッセンス照明装置の製造方法
WO2013004746A1 (fr) * 2011-07-04 2013-01-10 Commissariat à l'énergie atomique et aux énergies alternatives Dispositif de type photodiode contenant une capacite pour la régulation du courant d'obscurite ou de fuite
RU2507638C2 (ru) * 2008-10-02 2014-02-20 Конинклейке Филипс Электроникс Н.В. Устройство oled с покрытой шунтирующей линией
JP2015135821A (ja) * 2015-03-02 2015-07-27 Ｎｅｃライティング株式会社 有機エレクトロルミネッセンス照明装置及びその製造方法
WO2016034533A1 (fr) * 2014-09-04 2016-03-10 Osram Oled Gmbh Composant optoélectronique et procédé de fabrication d'un composant optoélectronique

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CN109659446A (zh) * 2018-12-21 2019-04-19 固安翌光科技有限公司 高可靠性oled屏体

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GB2419023B (en) * 2004-10-07 2008-08-27 Dainippon Printing Co Ltd Luminescence display panel
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DE102008045948A1 (de) * 2008-09-04 2010-03-11 Osram Opto Semiconductors Gmbh Verfahren zur Herstellung eines organischen strahlungsemittierenden Bauelements und organisches strahlungsemittierendes Bauelement
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WO2010089680A1 (fr) * 2009-02-05 2010-08-12 Philips Intellectual Property & Standards Gmbh Dispositif électroluminescent
JP2011249075A (ja) * 2010-05-25 2011-12-08 Nec Lighting Ltd 有機エレクトロルミネッセンス照明装置の製造方法
WO2013004746A1 (fr) * 2011-07-04 2013-01-10 Commissariat à l'énergie atomique et aux énergies alternatives Dispositif de type photodiode contenant une capacite pour la régulation du courant d'obscurite ou de fuite
FR2977719A1 (fr) * 2011-07-04 2013-01-11 Commissariat Energie Atomique Dispositif de type photodiode contenant une capacite pour la regulation du courant d'obscurite ou de fuite
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WO2016034533A1 (fr) * 2014-09-04 2016-03-10 Osram Oled Gmbh Composant optoélectronique et procédé de fabrication d'un composant optoélectronique
US10177340B2 (en) 2014-09-04 2019-01-08 Osram Oled Gmbh Optoelectronic device and method of producing an optoelectronic device
JP2015135821A (ja) * 2015-03-02 2015-07-27 Ｎｅｃライティング株式会社 有機エレクトロルミネッセンス照明装置及びその製造方法

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