JP2014179241A - Organic el element and translucent conductive substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic EL element to which an identification information thereof can be added with a simple structure without impairing the appearance thereof.SOLUTION: An organic EL element 10 includes a translucent substrate 1, a first electrode part 3 formed of a translucent conductive film laminated on the translucent substrate 1, metal wiring 2 provided in contact with the translucent conductive film by patterning a conductive metal layer, an organic light-emitting layer 4 laminated on the first electrode part 3, a second electrode part 5 provided so as to face the first electrode part 3 via the organic light-emitting layer 4, a light diffusion body 6 arranged on an opposite side to the first electrode part 3 via the organic light-emitting layer 4, and having light diffusivity to visible light, and an information display part 12 having a bar code symbol part 12A formed of a material reflecting infrared light, arranged between the organic light-emitting layer 4 and the light diffusion body 6, and provided at a position where infrared light can be incident and emitted through the light diffusion body 6.

Description

  The present invention relates to an organic EL element and a translucent conductive substrate.

Conventionally, an organic EL (electroluminescence) element is mentioned as a typical thing of a planar light emitting element.
The organic EL element is finally assembled in a state in which a light emitting structure is formed by cutting a laminated body sandwiching a light emitting layer between electrodes into a necessary size and covered with a translucent member constituting a display surface. Inspection is performed. At that time, in order to reflect the inspection information in the process, it is known that the organic EL element is provided with an identification symbol so that, for example, the manufacturing lot, the position information in the laminated body, and the like can be understood.
For example, Patent Document 1 states that “a translucent structure in which an organic EL element including at least an organic layer having a light emitting layer, a pair of electrodes sandwiching the organic layer, and the organic layer and the pair of electrodes is disposed. An organic EL comprising: a support substrate of the above; a sealing member disposed on the support substrate so as to airtightly cover the organic EL element; and an identification symbol provided on the sealing member. Panel. "
In Patent Document 1, as an identification symbol, “model, serial number, date of manufacture, direction of arrangement of the sealing member, or at least an arrangement position of the unit support substrate with respect to a base substrate including a plurality of the support substrates” is disclosed. Indicates any one ".

JP 2003-317941 A

However, the conventional organic EL elements as described above have the following problems.
In the technique described in Patent Document 1, since the identification symbol is formed on the surface of the organic EL panel, there is a problem that the appearance is deteriorated when used in a display device or a lighting device.
Although it is conceivable to add a member that covers and hides the identification symbol, there is a problem in that the manufacturing cost increases because the number of parts attaching steps increases and the number of parts increases.

  The present invention has been made in view of the above problems, and an organic EL element and a translucent element that can provide identification information of the organic EL element with a simple configuration without impairing the appearance of the organic EL element. An object is to provide a conductive substrate.

  In order to solve the above-described problems, the organic EL element according to the first aspect of the present invention includes a light-transmitting substrate and a first electrode portion formed of a light-transmitting conductive film laminated on the light-transmitting substrate. And metal wiring provided in contact with the translucent conductive film by patterning the conductive metal layer, an organic light emitting layer stacked on the first electrode portion, and the organic light emitting layer sandwiched between the organic light emitting layer and the organic light emitting layer A second electrode portion disposed opposite to the first electrode portion; a light diffuser disposed on the opposite side of the organic light emitting layer with the first electrode portion interposed therebetween; It has an information reading pattern formed of a material that reflects external light, is disposed between the organic light emitting layer and the light diffuser, and is provided at a position where infrared light can enter and exit through the light diffuser. And an information display unit.

  In the organic EL element, the information reading pattern of the information display unit is preferably provided by patterning the conductive metal layer.

  In the organic EL element, the metal wiring has a fine line pattern in which fine lines extending in one direction are arranged in parallel within a rectangular region, and at least a part of the information reading pattern of the information display unit is It is preferable to arrange in the rectangular area.

  In the organic EL element, the information reading pattern is selected from a manufacturing unique number composed of at least one of letters, symbols, and numerals, a reading code symbol representing the manufacturing unique number, and a logo mark. It is preferable to provide the above pattern.

  The translucent conductive substrate according to the second aspect of the present invention is a translucent conductive substrate used for an organic EL element, the translucent substrate, a translucent conductive film laminated on the translucent substrate, and The conductive metal layer is formed by patterning a conductive metal layer and a metal wiring provided in contact with the translucent conductive film, and a material provided in contact with the translucent conductive film and reflecting infrared light. And an information display unit having an information reading pattern.

  In the translucent conductive substrate, it is preferable that the information reading pattern of the information display unit is provided by patterning the conductive metal layer.

  In the translucent conductive substrate, the metal wiring has a fine line pattern in which fine lines extending in one direction are arranged in parallel within a rectangular region, and the information reading pattern of the information display unit includes at least one information read pattern. It is preferable that the portion is disposed in the rectangular region.

  In the above translucent conductive substrate, the information reading pattern is selected from a manufacturing unique number composed of at least one of letters, symbols, and numerals, a reading code symbol representing the manufacturing unique number, and a logo mark. It is preferable to provide one or more patterns.

  According to the organic EL element and the translucent conductive substrate of the present invention, in order to provide the information display unit that is formed of a material that reflects infrared light and is covered with a light diffuser, There exists an effect that it can provide with a simple structure, without impairing the external appearance of an organic EL element.

It is a typical top view of the organic EL element of embodiment of this invention. FIG. 2 is a schematic partial enlarged view of a part A and a part B in FIG. 1. It is CC sectional drawing in FIG. 2, and DD sectional drawing. It is a typical fragmentary enlarged view which shows an example of the information display part of the organic EL element of embodiment of this invention. It is typical process explanatory drawing which shows an example of the manufacturing process of the organic EL element of embodiment of this invention. It is a schematic diagram explaining the effect | action of the organic EL element of embodiment of this invention. It is a typical fragmentary enlarged view which shows the information display part of the organic EL element of the 1st modification of embodiment of this invention. It is a typical fragmentary enlarged view which shows the information display part of the organic EL element of the 2nd modification of embodiment of this invention. It is a typical partial enlarged view which shows the information display part of the organic EL element of the 3rd modification of embodiment of this invention. It is typical sectional drawing which shows the structure of the principal part of the organic EL element of the 4th-8th modification of embodiment of this invention.

Hereinafter, an organic EL element and a translucent conductive substrate according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic plan view of an organic EL element according to an embodiment of the present invention. FIG. 2A is a schematic partial enlarged view of part A in FIG. FIG. 2B is a schematic partial enlarged view of a portion B in FIG. Fig.3 (a) is CC sectional drawing in Fig.2 (a). FIG.3 (b) is DD sectional drawing in FIG.2 (b). FIG. 4 is a schematic partial enlarged view showing an example of the information display unit of the organic EL element according to the embodiment of the present invention.
Since each drawing is a schematic diagram, dimensions and shapes are exaggerated (the same applies to the following drawings).

The organic EL (electroluminescence) element 10 of the present embodiment shown in FIG. 1 is provided in a lighting device (not shown) as a light emitting means, for example, or in a display device so that the organic EL element 10 is pixel driven, It can be provided as a light source in various image display devices such as a liquid crystal display device in which the organic EL element 10 is disposed on the back surface of the image display element.
Further, in the liquid crystal display device, an illuminating device including the organic EL element 10 as a light emitting means may be disposed on the back surface of the image display element.

  As the outer shape of the organic EL element 10, an appropriate shape can be adopted according to the light emission shape according to the needs of the device to be used. explain.

The surface of the organic EL element 10 is covered with a light diffuser 6 that diffuses visible light emitted to the outside and reduces luminance unevenness. For this reason, although the light diffuser 6 has optical transparency, both the incident light that enters the organic EL element 10 and the reflected light that is reflected inside and emitted to the outside are light. It is diffused by the diffuser 6. For this reason, the internal structure cannot be clearly seen.
For example, below the light diffuser 6, a frame wiring 2 b arranged in a rectangular shape along the outer shape of the organic EL element 10 and a plurality of thin wires arranged in parallel with a pair of opposite sides of the frame wiring 2 b. The metal wiring 2 composed of the partial wiring 2a (thin line pattern), and the information display section 12 formed in the vicinity of the portion where the thin line wiring 2a and the frame wiring 2b intersect are provided.
However, when these are viewed from the light diffuser 6 side, as shown schematically in FIGS. 2A and 2B, the thin wire portion wiring 2a, the frame portion wiring 2b, and the information display portion 12 are respectively edge portions. Are blurred and are observed as blurred images 2 a ′, 2 b ′, and 12 ′ whose resolution is significantly reduced.

As shown in FIG. 3A, the cross-sectional configuration of the organic EL element 10 is, as shown in FIG. 3A, the light diffuser 6, the translucent substrate 1, the first electrode unit 3 (translucent conductive film), A thin wire portion wiring 2a, an organic light emitting layer 4, and a second electrode portion 5 are provided. 1B, as shown in FIG. 3B, the light diffuser 6, the translucent substrate 1, the first electrode unit 3, the frame wiring 2b, the information display unit 12, and the organic light emitting layer 4 are used. , And a second electrode unit 5.
Here, the translucent substrate 1, the metal wiring 2, the information display unit 12, and the first electrode unit 3 constitute a translucent conductive substrate 7. Moreover, the 1st electrode part 3, the organic light emitting layer 4, and the 2nd electrode part 5 may be called a light emission structure.

The light diffuser 6 employs a film material formed by adding fine particles imparting light scattering properties to a light transmissive base resin material.
As the base resin material of the light diffusing body 6, a material having optical transparency with respect to the wavelength of light emitted from the organic light emitting layer 4 to be described later is used. For example, a plastic material usable for an optical member is used. can do.
Examples of this material include polyester resin, acrylic resin, polycarbonate resin, polystyrene resin, MS (acrylic and styrene copolymer) resin, polymethylpentene resin, thermoplastic resin such as cycloolefin polymer, or polyester acrylate. And transparent resins such as radiation curable resins composed of oligomers such as urethane acrylate and epoxy acrylate, or acrylates.

  As the fine particles added to the light diffuser 6, particles made of an inorganic oxide or particles made of a resin can be used. For example, transparent particles made of an inorganic oxide include particles made of silica, alumina, titanium oxide, or the like. The transparent particles made of resin include acrylic particles, styrene particles, styrene acrylic particles and cross-linked products thereof, melamine-formalin condensate particles, PTFE (polytetrafluoroethylene), PFA (perfluoroalkoxy resin), FEP (tetrafluoroethylene). Examples thereof include fluorine-containing polymer particles such as fluoroethylene-hexafluoropropylene copolymer), PVDF (polyfluorovinylidene), and ETFE (ethylene-tetrafluoroethylene copolymer), and silicon resin particles. These fine particles may be used as a mixture of two or more.

The light diffusing property of the light diffuser 6 is within a range where visible light diffusibility necessary for display and illumination is obtained, and the information display unit 12 is resolved when the information display unit 12 is imaged with infrared light. Within a possible range, the visibility of the metal wiring 2 and the information display unit 12 by visible light is set as low as possible.
Here, the wavelength of infrared light can be set to an appropriate wavelength range as long as it is a wavelength that can be reflected and imaged by the information display unit 12, but a near infrared wavelength is preferable, for example, 800 nm to 1000 nm. The wavelength range is particularly preferred.

The light scattering property suitable for the light diffuser 6 varies depending on the shape of the metal wiring 2 and the information display unit 12, but for example, in the case of a character pattern in which the information display unit 12 represents a manufacturing unique number as described later, The haze value is preferably 75% or more and 95% or less when measured according to JIS-K7105.
If the haze value is less than 75%, the character pattern becomes too conspicuous, which is not preferable. On the other hand, if the haze value is larger than 95%, the light transmittance becomes too low, which causes a decrease in luminance of the organic EL element 10, which is not preferable.

The fine particles added to the base resin material preferably have an average particle size of 1 μm to 3 μm. The fine particles are preferably monodispersed in order to satisfy the following performance. It is not monodispersed, and if fine particles are mixed, it is not preferable because the dispersibility of the particles is inhibited. In addition, it is not preferable that coarse particles are mixed, because the appearance of defects such as roughness may occur due to the particles protruding from the surface. The average particle diameter can be measured by a laser diffraction scattering method or the like.
The smaller the particle diameter, the larger the ratio of the scattering cross section at the infrared wavelength and the scattering cross section at the visible wavelength. For this reason, light scattering is increased at visible wavelengths, and the metal wiring 2 and the information display unit 12 are blurred and visibility is lowered. However, since light is not scattered much at infrared wavelengths, it is possible to capture a clear image. is there.
When the average particle size of the fine particles is smaller than 1 μm, the scattering cross section at the visible wavelength becomes too small, and the shapes of the metal wiring 2 and the information display unit 12 may be easily seen through the light diffuser 6.
When the average particle size of the fine particles is larger than 3 μm, the scattering cross section does not become larger than the particle diameter, so that the scattering property reaches a peak. Further, the ratio of the scattering cross section at the near infrared wavelength to the scattering cross section at the visible wavelength is not preferable.

The preferred thickness of the light diffuser 6 is preferably greater than 10 times and less than 30 times the mean free path of light having a wavelength of 550 nm incident on the light diffuser 6.
That is, when the thickness of the light diffuser 6 is Dv, it is preferable that Dv satisfies the following formula.

10 <Dv / Lp <30 (1)
Lp = 1 / (ρ · Sp / Vp) (2)

Here, Lp is the mean free path, Sp is the scattering cross section of the fine particles of the light diffuser 6, Vp is the fine particle volume, and ρ is the volume density of the fine particles in the light diffuser 6.
The scattering cross section Sp of the fine particles of the light diffuser 6 can be calculated from Mie's scattering theory from the above average particle diameter, the refractive index of the fine particles, and the refractive index of the base resin. The Becke line method can be used for the refractive index of the fine particles and the refractive index of the base resin. Further, the volume density ρ of the fine particles in the light diffuser 6 can be calculated from the weight ratio, the true specific gravity of the fine particles, and the specific gravity of the base resin. That is, volume density ρ = weight ratio · (specific gravity of base resin / true specific gravity of fine particles).
When Dv / Lp is 10 or less, light scattering with light having a wavelength of 550 nm is less likely to occur, so that the metal wiring 2 and the information display unit 12 are easily visible.
Moreover, when Dv / Lp is 30 or more, light scattering with light having a wavelength of 550 nm is likely to occur, and reading of the information display unit 12 is difficult even at infrared wavelengths, which is not preferable.
The outermost surface of the light diffuser 6 may have an uneven shape. At this time, the thickness Dv of the light diffuser 6 can be the average thickness. This average thickness can be calculated from a surface shape measured by a laser microscope and a cross section of the light diffuser 6 measured by an optical microscope.

  An example of the light diffuser 6 is a diffusion film in which Dv = 45 (μm) is obtained by adding 20% by volume density ρ of silicone particles having an average particle diameter of 2 μm to an acrylic resin that is a base resin material. be able to. Dv / Lp in the light diffuser 6 is 18.4, and the haze value is 89%.

The translucent substrate 1 is a plate-like member serving as a base material of the translucent conductive substrate 7, and the light diffuser 6 is laminated on the first surface 1a facing the outside of the organic EL element 10, and the first surface 1a. The first electrode portion 3 and the metal wiring 2 are laminated and provided on the second surface 1b opposite to the first surface.
The material of the translucent substrate 1 is not particularly limited as long as it is a translucent material that can transmit light from the organic light emitting layer 4 satisfactorily. For example, a glass plate, a synthetic resin, or the like can be employed.

When a glass plate is adopted as the material of the translucent substrate 1, the heat resistance during processing is higher and the processing is easier than when a synthetic resin is used.
In particular, when sapphire glass is employed as the material of the light-transmitting substrate 1, the sapphire glass has a high thermal conductivity of 15 to 40 W (/ m · K), so that heat generated with light emission in the organic light emitting layer 4 is suitable. Can diffuse. Furthermore, since the refractive index of sapphire glass is about 1.76, when adopting ITO (indium tin oxide) as the first electrode portion 3 described later, reflection at the interface with ITO can be suppressed, It can be set as the structure where the electrode structure by ITO is not conspicuous.

  As a synthetic resin for the material of the translucent substrate 1, for example, a plastic material such as PMMA, polycarbonate, polystyrene, or the like can be used. Furthermore, although various other materials can be used, a particularly preferable material is a cycloolefin-based polymer, and this polymer has all of material properties such as processability and heat resistance, water resistance, and optical translucency. It is excellent.

  In this embodiment, as an example, a glass plate made of alkali-free glass and having a thickness of 1.2 (mm) is employed. In this example, there is almost no difference between the transmittance in the visible region and the transmittance in the near infrared region, and both are about 90%.

The first electrode unit 3 is a transparent electrode for applying a voltage to the organic light emitting layer 4 and transmitting light emitted from the organic light emitting layer 4 to the outside, and substantially covers the second surface 1 b of the translucent substrate 1. They are stacked in a rectangular area.
The material of the 1st electrode part 3 will not be specifically limited if it is a translucent material which has electroconductivity, For example, ITO (indium tin oxide), IZO (indium oxide tin oxide), ZnO (zinc oxide) etc. A translucent conductive film with a film formed thereon can be employed.
In the present embodiment, since the first electrode portion 3 constitutes the anode of the light emitting structure, ITO having a thickness t3 = 100 (nm) is employed as an example. The transmittance of the first electrode unit 3 from the visible region (380 nm to 780 nm) to the near infrared region (780 to 1000 nm) is about 80%.

Since the organic EL element 10 is a current-driven element, if the electric resistance of the first electrode unit 3 is large, a sufficient amount of current cannot be obtained near the center of the first electrode unit 3, resulting in a decrease in the amount of light. And it will be dark. For this reason, in the organic EL element 10, the metal wiring 2 is brought into contact with the first electrode portion 3, so that the electric resistance at the center portion of the first electrode portion 3 is not lowered excessively.
As described above, the metal wiring 2 is a member that reduces the electrical resistance value of the first electrode portion 3, and the shape, thickness, and the like of the metal wiring 2 are appropriately set according to the electrical resistance value required for the light emitting structure. Can be set.
In the present embodiment, the metal wiring 2 is formed of copper as an example, and has a thickness t2 = 15 (nm) stacked between the first surface 1a of the translucent substrate 1 and the first electrode portion 3. It is a layered part. For this reason, the metal wiring 2 is in contact with the first electrode portion 3 on all sides and back surfaces (surfaces opposite to the surface in contact with the second surface 1b) except for the portion in contact with the second surface 1b.
Thereby, the metal wiring 2 is electrically connected to the first electrode portion 3.
By setting the metal wiring 2 to such a thickness, the reflectance with respect to visible light is about 60%. On the other hand, the reflectance for the wavelength range of 800 nm to 1000 nm is about 90%.

As shown in FIG. 1, the frame part wiring 2 b is formed in a band shape having a width of 2 mm from the outer periphery of the first electrode part 3, and is formed in a rectangular shape as a whole.
The fine line portion wiring 2a is formed in a rectangular region surrounded by the frame portion wiring 2b, and forms a parallel lattice pattern having a width w _2a and an arrangement pitch p _2a as shown in FIG. .
The width w _{2a and the} arrangement pitch p _2a may be appropriately set according to the electrical resistance required for the first electrode unit 3. As an example of a preferable range, an example in which the width w _2a is 10 μm or more and 2 mm or less and the arrangement pitch p _2a is 20 μm or more and 4 mm or less can be given.
If the width w _2a is narrower than 10 μm, it is not preferable because the resolution requirement of photolithography is severe and processing becomes very difficult. If the width w _2a is larger than 2 mm, the thin line portion wiring 2a becomes conspicuous, which is not preferable.
The width w _2a is preferably half to 1/10 of the arrangement pitch p _2a . If it is wider than half, the luminance of the organic EL element 10 is undesirably lowered. If it is narrower than 1/10, sufficient conductivity cannot be obtained.
In this embodiment, as an example, w _2a = 50 (μm) and p _2a = 200 (μm).

The material of the metal wiring 2 is not particularly limited as long as it is a metal having a resistance lower than that of the first electrode portion 3. For example, a single metal such as aluminum, copper, gold, or silver, MAM (Mo (molybdenum) / Al An alloy such as Nd (aluminum-neodymium alloy) / Mo (molybdenum) can be used.
Further, the metal wiring 2 may have a single layer structure made of one kind of metal or alloy, or may have a multilayer structure in which a plurality of kinds of metals or alloys are laminated.
In this embodiment, aluminum is adopted as an example.

  For such a metal wiring 2, for example, a conductive metal layer having a thickness t2 is formed on the translucent substrate 1 by a metal or an alloy constituting the metal wiring 2, and the conductive metal layer is formed by photolithography. It can be manufactured by patterning. As an exposure mask used for patterning, a chrome mask blank or the like in which a fine pattern corresponding to the pattern of the fine line portion wiring 2a and the frame portion wiring 2b is formed by a laser exposure drawing machine or the like can be used.

The information display unit 12 is provided between the organic light emitting layer 4 and the light diffuser 6 at a position where infrared light can enter and exit through the light diffuser 6, and displays information specific to the organic EL element 10. It is.
In the present embodiment, as an example, similarly to the metal wiring 2, it is formed as a layered portion between the translucent electrode portion 3 and the translucent substrate 1, and the frame wiring 2 b and the thin wire wiring 2 a of the metal wiring 2. Is formed in a rectangular region whose longitudinal direction is along the extending direction of the frame wiring 2b. For this reason, a part in the short direction of the information display unit 12 is provided so as to overlap with a rectangular region in which the thin line portion wiring 2a is formed.
The information display unit 12 has an information reading pattern formed of a material that reflects infrared light.
In the present embodiment, the information reading pattern of the information display unit 12 includes, as an example, a one-dimensional barcode that is a reading code symbol representing a manufacturing unique number for identifying each element of the organic EL element 10. As shown in FIG. 4, a barcode symbol portion 12A (reading code symbol), a character portion 12B, and a quiet zone 12C are provided.

The bar code symbol portion 12A is a portion arranged in accordance with information displayed by the bar pattern 12a having an appropriate width for displaying information.
The character part 12B is a part arranged adjacent to the barcode symbol part 12A and in which a plurality of characters composed of alphanumeric characters or symbols corresponding to information represented by the barcode symbol part 12A are arranged. For this reason, the manufacturing unique number can be configured by appropriately combining letters, symbols and the like other than numerals. FIG. 4 shows an example in which the character portion 12B is composed of a sequence of numbers “193465”.
The quiet zone 12C is a blank portion having a certain width or more formed at both ends in the arrangement direction of the barcode symbol portion 12A in order to indicate the beginning and end of the barcode.

It is preferable that the dimension of the information display unit 12 is set according to the pattern so that it does not resolve when observed with visible light through the light diffuser 6 but resolves when observed with infrared light.
For example, the minimum gap of the bar pattern 12a of the barcode symbol portion 12A is preferably 0.1 mm or more and 0.5 mm or less.
The characters constituting the character pattern 12b preferably have a size of 0.3 mm □ or more and 3 mm □ or less. Here, “Xmm □” means the size of a square whose side is X mm.

The material of the information display unit 12 is not particularly limited as long as it is a material that reflects infrared light. For example, one or more materials selected from metal materials and alloys that can be used for the metal wiring 2 are used. Can be adopted.
The wavelength range and reflectance of the infrared light can be appropriately selected according to the wavelength sensitivity of the information reading means described later. For example, when an image pickup apparatus such as a camera using a silicon-based image pickup device is used as the reading unit, the reflectance is preferably 80% or more in a wavelength range of 800 nm to 1000 nm.

  In addition, unlike the metal wiring 2, the information display unit 12 does not necessarily have conductivity. For example, an insulating material or a conductive material having a higher electrical resistance than the first electrode unit 3 is used. Is possible. For example, a solder resist can be suitably employed.

As an example, the information display unit 12 in this embodiment is formed by patterning the same conductive metal layer as that for forming the metal wiring 2 at the same time when the metal wiring 2 is patterned. That is, the patterning is performed so that the conductive metal layer remains in the portions corresponding to the barcode symbol portion 12A and the character portion 12B in the same manner as the metal wiring 2 is formed.
For this reason, as shown in FIG. 3B, the information display unit 12 is formed in the same layer as the metal wiring 2 and has the same thickness t2, and the thin line wiring 2a and the frame wiring 2b. Are in parallel.
In addition, the gaps between the quiet zones 12C and the bar patterns 12a are filled with ITO serving as the first electrode portion 3.

The organic light emitting layer 4 is a film-like, sheet-like, or plate-like member that contains a fluorescent organic compound and emits light by excitons generated by recombination of electrons and holes injected into the fluorescent organic compound. In the present embodiment, the organic light emitting layer 4 is laminated on the first electrode unit 3 so as to cover the entire first electrode unit 3.
The organic light emitting layer 4 may be a white light emitting layer that emits white light, or may be a light emitting layer that emits light in a specific range of wavelengths such as blue, red, yellow, and green.
For example, as an example of a light emitting layer that emits white light, rubrene is added to CuPc (copper phthalocyanine) / α-NPD in order from the first electrode unit 3 between the first electrode unit 3 and a second electrode unit 5 described later. What is necessary is just to make it the structure which laminated | stacked perylene 1% dope / Alq3 / lithium fluoride on 1% dope / dinactylanthracene.

Further, as the organic light emitting layer 4, a known material capable of setting the wavelength of light emitted from the organic light emitting layer 4 to R (red), G (green), and B (blue) is appropriately selected and adopted. You can also.
Further, the organic light emitting layer 4 may be a light emitting layer in which pixels that emit light of respective wavelengths corresponding to the three primary colors of light are arranged and the light emission state is controlled for each pixel. In this case, the organic EL element 10 functions as a full color display. The organic EL element 10 can also function as a full-color display by overlapping a color filter on the organic light emitting layer 4 in which a plurality of pixels emitting white light are arranged and arranged.

The second electrode portion 5 is an electrode member disposed at a position facing the first electrode portion 3 with the organic light emitting layer 4 interposed therebetween in order to apply a voltage to the organic light emitting layer 4.
In this embodiment, the 2nd electrode part 5 consists of metal materials, such as aluminum and silver, for example, and it can reflect the light from the organic light emitting layer 4 to the organic light emitting layer 4 side while comprising the cathode of a light emitting structure. It has become.
In the present embodiment, the second electrode portion 5 employs aluminum having a thickness t5 = 100 (nm) as an example.

  The first electrode unit 3 and the second electrode unit 5 having such a configuration are connected to a power supply unit (not shown), and voltage is applied to the first electrode unit 3 and the second electrode unit 5 by the power supply unit. , Respectively, can inject electrons and holes into the organic light emitting layer 4.

The organic EL element 10 having such a configuration as a main part can be manufactured as follows.
5A, 5 </ b> B, 5 </ b> C, and 5 </ b> D are schematic process explanatory views illustrating an example of a manufacturing process of the organic EL element according to the embodiment of the present invention.

First, as shown in FIG. 5A, a conductive metal layer M having a thickness t3 is formed on the second surface 1b of the translucent substrate 1.
Next, as shown in FIG. 5B, the conductive metal layer M is patterned by photolithography to form the metal wiring 2 and the information display unit 12 at the same time.
For this purpose, first, an exposure mask having an opening pattern corresponding to the shapes of the metal wiring 2 and the information display unit 12 is manufactured. Therefore, the exposure mask of this embodiment is formed with an opening pattern corresponding to the pattern of the barcode symbol portion 12A and the character portion 12B indicating the manufacturing unique number which is the information reading pattern in the information display portion 12.
Next, a resist (not shown) is applied onto the conductive metal layer M, and exposure is performed by projecting an exposure mask pattern using an ultraviolet exposure machine or the like. Then, after developing the exposed portion, etching is performed to remove the conductive metal layer M corresponding to the exposed portion.
Thereby, as shown in FIG.5 (b), the metal wiring 2 and the information display part 12 are formed.

Next, as shown in FIG. 5C, the thickness measured from the second surface 1b by sputtering an ITO transparent conductive film on the patterned conductive metal layer M and the second surface 1b. A layer film of the first electrode portion 3 having a thickness t3 is formed.
Thus, the translucent conductive substrate 7 is formed.

Next, as shown in FIG. 5D, the organic light emitting layer 4 is formed on the first electrode portion 3 of the translucent conductive substrate 7 by vapor deposition. For example, a laminated body in which CuPc (copper phthalocyanine) / α-NPD is laminated with rubrene 1% doped / dinactylanthracene and perylene 1% doped / Alq 3 / lithium fluoride in this order is formed.
When the organic light emitting layer 4 is formed, the second electrode portion 5 having a thickness t5 is formed on the organic light emitting layer 4.
In this way, the organic EL element 10 as shown in FIGS. 3A and 3B is manufactured.

Next, the operation of the organic EL element 10 will be described focusing on the operation of the information display unit 12.
FIG. 6 is a schematic diagram for explaining the operation of the organic EL element according to the embodiment of the present invention.

When a voltage is applied to the first electrode unit 3 and the second electrode unit 5 via a power supply unit (not shown), the organic EL element 10 receives electrons and holes from the first electrode unit 3 and the second electrode unit 5, respectively. Is injected into the organic light emitting layer 4. Thereby, the organic light emitting layer 4 emits light.
As shown in FIG. 3A, the light L3 directed from the organic light emitting layer 4 to the first electrode portion 3 is transmitted according to the transmittance of the first electrode portion 3 and the metal wiring 2, and the light transmissive substrate 1 is transmitted. And then enters the light diffuser 6.
On the other hand, the light L5 traveling from the organic light emitting layer 4 to the second electrode portion 5 is reflected by the second electrode portion 5, travels inside the organic light emitting layer 4, enters the first electrode portion 3, and enters the light L3. In the same manner as described above, the light passes through the first electrode portion 3 and the transmittance of the metal wiring 2, passes through the translucent substrate 1, and then enters the light diffuser 6.
When these lights L3 and L5 enter the light diffuser 6, the light diffuser 6 scatters the light L3 and L5 by the fine particles added to the light diffuser 6 and emits the light from the light diffuser 6. Is emitted to the outside as outgoing light L6 that diffuses in a certain range determined according to the wavelength. However, in the present embodiment, since the light diffuser 6 is suppressed from scattering of infrared light, the degree to which infrared light is diffused is significantly smaller than that of visible light.

For this reason, the external observer can visually recognize the surface light emitting region corresponding to the shape of the organic light emitting layer 4 from various directions of the diffusion range of the emitted light L6 by the visible light component of the emitted light L6.
At that time, the luminance unevenness based on the difference in transmittance between the first electrode portion 3 and the metal wiring 2 is leveled by scattering in the light diffuser 6.
As a result, as schematically shown in FIG. 2A, for example, the outline of the thin line portion wiring 2a is blurred and the line width is widened, and only the blurred image 2a ′ with reduced resolution can be observed. Visibility is significantly reduced.
In particular, in this embodiment, since the metal wiring 2 is thinned to increase the transmittance of the metal wiring 2, the contrast of the thin line wiring 2a is low even in the absence of the light diffuser 6. . Thereby, the visibility is further lowered.

Such a decrease in visibility due to the light diffuser 6 also occurs in the same manner for the information display unit 12 formed with the same material and the same thickness as the metal wiring 2.
For this reason, as schematically shown in FIG. 2B, the observer can observe only the blurred image 12a ′ in which the barcode symbol part 12A and the character part 12B of the information display part 12 are not resolved.
Thus, since the internal structure of the organic EL element 10 becomes invisible by the light diffuser 6, the appearance of the organic EL element 10 is improved as compared with the case where the internal structure of the organic EL element 10 is visible.
Further, since identification information as represented by the information display unit 12 is not formed on the light diffuser 6, there is no need to add a member that conceals such identification information in appearance. For this reason, the external appearance and designability of the organic EL element 10 can be improved with a simple configuration.

In addition, since the observer cannot read the production unique number represented by the barcode symbol portion 12A and the character portion 12B through the light diffuser 6, the production unique number of the organic EL element 10 is concealed from the visual observer. can do.
Since the information display part 12 which shows the identification information of the organic EL element 10 is manufactured by the manufacturing process similar to the metal wiring 2, it can be formed corresponding to the manufacturing process accurately.
Moreover, in this embodiment, since the information display part 12 is formed simultaneously with the metal wiring 2, the manufacturing process which forms only the information display part 12 can be omitted, so that the manufacturing process is simplified and the manufacturing cost is further reduced. can do.

On the other hand, in the organic EL element 10 of the present embodiment, the manufacturing unique number concealed in this way can be accurately read by reading means using infrared light.
The camera 8 and the image processing device 9 shown in FIG. 6 are examples of such reading means.
The camera 8 includes an imaging optical system 8a that forms an image of light from the organic EL element 10 on an imaging surface, and an imaging element 8b that is disposed on the imaging surface of the imaging optical system 8a and photoelectrically converts an image of the organic EL element 10. Prepare.
As the image sensor 8b, for example, a CCD that is a silicon-based image sensor is particularly suitable. The CCD is preferable because the photon wavelength corresponding to the band gap of silicon is in the near infrared, and thus has good sensitivity to near infrared light.
In addition, the camera 8 includes a visible light cut filter 8c that cuts light having a short wavelength equal to or less than visible light and allows only infrared light to enter the imaging optical system 8a. As an example, the cutoff wavelength of the visible light cut filter 8c is 800 nm.
The camera 8 is connected to an image processing device 9 that acquires an image signal from the image sensor 8b and performs image processing.

For example, the image processing device 9 performs image processing on the image patterns of the barcode symbol portion 12A and the character portion 12B of the information display portion 12 and analyzes the information represented by each of them, and the acquired image signal and image A monitor 9b for displaying the processed image data is provided.
In this embodiment, the image processing apparatus 9 employs a computer including a CPU, a memory, an input / output interface, an external storage device, and the like.

As shown in FIG. 6, visible from the outside of the light diffuser 6 side of the organic EL element 10, when the illumination light L is incident, including a visible light L _V and the infrared light by _IR, metal wires 2 and the information display section 12 the light L _V and the infrared light _IR is reflected, it passes through the light transmitting substrate 1, incident on the light diffuser 6.
In the present embodiment, the visible light L _V is scattered by the light diffuser 6, but is emitted from the light diffuser 6 as diffused light, than the visible light L _V of long wavelength infrared light _IR is the light diffusing It is hardly scattered by the body 6.
On the other hand, the camera 8 images only the infrared light _IR that passes through the visible light cut filter 8c on the imaging surface. For this reason, the image pickup device 8b of the camera 8 picks up a clear image of the information display unit 12 using infrared light _IR . The image signal photoelectrically converted by the image sensor 8b is sent to the image processing device 9 and displayed on the monitor 9b.
Further, the image processing device 9 performs image processing on the image signal by the image analysis unit 9a and analyzes the image information. Thereby, for example, the image processing device 9 can decode the information of the barcode symbol part 12A, or can recognize the image of the character part 12B and acquire information represented by the character part 12B. These pieces of analysis information are displayed on the monitor 9b.
In this way, the observer can read the information represented by the information display unit 12 from the image or analysis information displayed on the monitor 9b.

Illumination light L above, when used only for the purpose of reading information of the information display unit 12 removes the visible light Lv, it is also possible to use a light source that includes only the infrared light L _IR.
Further, the illumination light L is not limited to external illumination, and an infrared light component generated by the organic light emitting layer 4 may be used by causing the organic EL element 10 to emit light. In this case, when the metal wiring 2 and the information display unit 12 reflect infrared light, transmitted light that passes through the first electrode unit 3 between the metal wiring 2 and the information display unit 12 is imaged by the camera 8. For this reason, silhouette images of the metal wiring 2 and the information display unit 12 are acquired by the image processing device 9. The image processing device 9 acquires the same analysis information as described above by analyzing the image of the low luminance part by the image analysis unit 9a, or the image in which the barcode symbol part 12A and the character part 12B constitute the low luminance part. Or displayed on the monitor 9b.

  As described above, in order to provide the information display unit 12 formed of a material that reflects infrared light and covered with the light diffuser 6, the identification information of the organic EL element 10 is used for the appearance of the organic EL element 10. It can be applied with a simple configuration without damage.

[First Modification]
Next, the organic EL element of the 1st modification of this embodiment is demonstrated.
FIG. 7 is a schematic partial enlarged view showing an information display unit of an organic EL element according to a first modification of the embodiment of the present invention.

As shown in FIG. 1, the organic EL element 20 of the present modification includes an information display unit 22 instead of the information display unit 12 in the organic EL element 10 of the above embodiment.
Hereinafter, a description will be given focusing on differences from the above embodiment.

As shown in FIG. 7, the information display unit 22 is formed with a rectangular blank portion 22b at the same position as the information display unit 12, and a character pattern 22a (information reading pattern) is formed within the range of the blank portion 22b. It has been done.
The character pattern 22a is a part where characters representing one or more pieces of character information including alphanumeric characters and symbols are arranged, for example.
The size of the character constituting the character pattern 22a is preferably the same as the character pattern 12b of the above embodiment.
The information represented by the character pattern 22a is not particularly limited as long as it is information for identifying the organic EL element 20. For example, a manufacturing unique number similar to that in the above embodiment can be adopted. Examples of other identification information include a model number (symbol), a manufacturing date, a product name, a brand name, a logo mark, and a character string or mark for authenticity determination.
FIG. 7 shows an example in which the character pattern 22a is composed of an array of numbers, English characters, and symbols “13A1934-3C” as an example.

  Such an information display unit 22 can be manufactured by the same material and manufacturing method as the information display unit 12. For example, in the same manner as in the above embodiment, the metal wiring 2 can be manufactured simultaneously with the same manufacturing process as that for forming the metal wiring 2.

  According to this modification, an information reading pattern is formed by an arbitrary character string and symbol string, and thus a wider range of information display can be performed as compared to the above embodiment.

[Second Modification]
Next, the organic EL element of the 2nd modification of this embodiment is demonstrated.
FIG. 8 is a schematic partial enlarged view showing an information display unit of an organic EL element according to a second modification of the embodiment of the present invention.

As shown in FIG. 1, the organic EL element 30 of the present modification includes an information display unit 32 instead of the information display unit 12 in the organic EL element 10 of the above embodiment.
Hereinafter, a description will be given focusing on differences from the above embodiment.

As shown in FIG. 8, the information display unit 32 has a square blank portion 32b formed at the same position as the information display unit 12, and a two-dimensional barcode as a reading code symbol within the range of the blank portion 32b. A QR code portion 32a (information reading pattern, reading code symbol) as an example is formed.
The QR code part 32a is a part where a cut-out symbol part 32A, an alignment symbol part 32B, and a data cell part 32C are formed based on a QR code (registered trademark) standard.
Specific examples of the QR code standard include Model 2M1 (21 × 21 cell) error correction Q (25%).

The information represented by the data cell unit 32 </ b> C is not particularly limited as long as it is information for identifying the organic EL element 30. For example, the same manufacturing unique number as in the above embodiment, the identification information exemplified in the first modification, and the like can be employed.
In addition, since the QR code (registered trademark) has a remarkably large amount of information that can be recorded in comparison with the one-dimensional barcode in terms of the number of characters, for example, the text information representing the specifications and manufacturing history of the organic EL element 10 is encoded. It is possible.

Such an information display unit 32 can be manufactured by the same material and manufacturing method as the information display unit 12. For example, in the same manner as in the above embodiment, the metal wiring 2 can be manufactured simultaneously with the same manufacturing process as that for forming the metal wiring 2.
In recent years, a technique for forming the metal wiring 2 has been developed, and even a line width that cannot be recorded by conventional patterning by proximity exposure can be formed by using a projection exposure machine. It has become. Specifically, it is possible to record L / S having a width of about 20 μm (the sum of the width of the metal wiring and the width of the gap between the wirings). For this reason, a linear pattern having a width of 10 μm can be easily formed.
The data cell unit 32C records information in a sequence of dot-shaped cells. In order to reduce the reading error, it is preferable to use a 20 μm square cell for the data cell unit 32C.
In this case, the QR code portion 32a is formed to have a size of 0.42 mm (= 0.02 mm × 21 cells) on one side.

The QR code portion 32a that does not resolve when viewed with visible light through the light diffuser 6 but resolves when viewed with infrared light preferably has a size of 0.3 mm □ to 2 mm □.
Here, in order to resolve the QR code portion 32a having a size close to the lower limit, it is more preferable to use the long-wavelength illumination light _LIR among the near-infrared light.
As described above, when the QR code portion 32a is 0.42 mm □, can use the illumination light _{L IR} of 900nm vicinity satisfactorily resolved the QR code portion 32a by imaging by the camera 8.

  According to this modification, since the information reading pattern is formed by the QR code portion 32a, more information can be displayed in a compact space compared to the above embodiment.

[Third Modification]
Next, the organic EL element of the 3rd modification of this embodiment is demonstrated.
FIG. 9 is a schematic partial enlarged view showing an information display unit of an organic EL element according to a third modification of the embodiment of the present invention.

As shown in FIG. 1, the organic EL element 40 of the present modification includes an information display section 42 instead of the information display section 32 in the organic EL element 30 of the second modification.
Hereinafter, a description will be given centering on differences from the second modification.

As shown in FIG. 9, the information display part 42 is formed by inverting the opening of the QR code part 32a and the metal part of the information display part 32 of the second modification and forming the blank part 32b with a metal part. Yes, instead of the QR code portion 32a and the margin portion 32b, an inverted QR code portion 42a (information reading pattern, reading code symbol) and an inverted margin portion 42b are provided. That is, the information display unit 42 corresponds to a pattern obtained by performing negative / positive inversion conversion on the pattern of the information display unit 32.
For this reason, the inverted QR code part 42a replaces the cutout symbol part 32A, the alignment symbol part 32B, and the data cell part 32C with a cutout symbol part 42A in which a pattern formed by each pattern metal part is formed by an opening, and an alignment. A symbol part 42B and a data cell part 42C are provided.

The information display unit 42 is different from the information display unit 42 in that, when the conductive metal layer M is patterned, an exposure mask having a pattern in which an exposed portion and a non-exposed portion of the pattern are reversed is formed. It can be manufactured in the same manner as the information display unit 32 of the modification.
According to the present modification, since the information reading pattern is formed by the inverted QR code portion 42a, more information is displayed in a smaller space than in the above embodiment, as in the second modification. be able to.

[Fourth to eighth modifications]
Next, fourth to eighth modifications of the present embodiment will be described.
10A, 10 </ b> B, 10 </ b> C, 10 </ b> D, and 10 </ b> E are schematic diagrams illustrating a configuration of main parts of organic EL elements according to fourth to eighth modifications of the embodiment of the present invention. It is sectional drawing.

4th-8th modification is a modification of the layer structure of the organic EL element 10 of the said embodiment.
Hereinafter, a description will be given focusing on differences from the above embodiment.

As shown in FIG. 10A, the organic EL element 60 of the fourth modified example includes a first electrode part 63 instead of the first electrode part 3 of the organic EL element 10 of the above embodiment.
The first electrode portion 63 is made of the same material as the first electrode portion 3 of the above embodiment, but the layer thickness measured from the surface of the second surface 1b and the metal wiring 2 (information display portion 12) is substantially constant ( The only difference is that it is formed so as to include a certain case.
For this reason, the 1st electrode part 63 contact | abuts the parallel part 63a contact | abutted with the side surface 2e of the metal wiring 2 (information display part 12), and the back surface 2d (2nd surface 1b) of the metal wiring 2 (information display part 12). And a back surface portion 63b in contact with the surface, and the layer thickness of the parallel portion 63a and the back surface portion 63b is substantially equal to each other (including the case where they are equal).

  Such an organic EL element 60 is the same as the first except that the first electrode part 63 is laminated with a substantially constant layer thickness after the metal wiring 2 and the information display part 12 are formed on the translucent substrate 1. It can be manufactured in the same manner as in the embodiment.

As shown in FIG. 10 (b), the organic EL element 70 of the fifth modified example includes a first electrode part 73 instead of the first electrode part 3 of the organic EL element 10 of the above embodiment.
The first electrode portion 73 is made of the same material as the first electrode portion 3 of the above embodiment, but is formed so that the layer thickness measured from the second surface 1b is equal to the metal wiring 2 (information display portion 12). The only difference is that
Therefore, the first electrode portion 73 is in contact with the side surface 2e of the metal wiring 2 (information display portion 12), and the organic light emitting layer 4 (not shown) is connected to the first electrode portion 73 and the metal wiring 2 (information display). Part 12).

  In such an organic EL element 70, the metal wiring 2 and the information display unit 12 are formed on the translucent substrate 1, and then the second layer 1b has the same layer thickness as the metal wiring 2 and the information display unit 12 on the second surface 1b. It can be manufactured in the same manner as in the first embodiment except that one electrode portion 73 is formed.

As shown in FIG. 10C, the organic EL element 80 of the sixth modified example includes a first electrode part 83 instead of the first electrode part 3 of the organic EL element 10 of the above embodiment.
The first electrode portion 83 is made of the same material as the first electrode portion 3 of the above embodiment, but is formed in contact with the entire surface of the second surface 1b.
Further, the metal wiring 2 (information display unit 12) of the present modification is formed on the first electrode unit 83. That is, the metal wiring 2 (information display part 12) is in contact with the first electrode part 83 on the surface that is in contact with the second surface 1b in the above embodiment, and the side surface 2e and the back surface 2d are not shown in the drawing. It is in contact with the light emitting layer 4.

  In such an organic EL element 80, the first electrode portion 83 is formed on the entire surface of the second surface 1 b of the translucent substrate 1, and then the metal wiring 2 and the information display portion 12 are formed on the first electrode portion 3. Except for the point to form, it can manufacture similarly to the said 1st Embodiment.

As shown in FIG. 10 (d), the organic EL element 90 of the seventh modified example is replaced with the first electrode part 3 of the organic EL element 10 of the above-described embodiment, instead of the first electrode of the seventh modified example. The electrode part 73 is provided and the insulating film 13 is further added.
The insulating film 13 covers the metal wiring 2 (information display unit 12) on the back surface 2d side of the metal wiring 2 (information display unit 12).
The material of the insulating film 13 is not particularly limited as long as it has insulating properties, but preferable examples include polyimide, urethane resin, acrylic resin, and the like.

  In such an organic EL element 90, the metal wiring 2 (information display unit 12) and the first electrode unit 73 are laminated on the translucent substrate 1 in the same manner as in the fifth modification, and then the metal wiring is formed. 2 (information display unit 12), except that the insulating film 13 is formed, it can be manufactured in the same manner as in the first embodiment.

According to this modification, the organic light emitting layer 4 (not shown) and the metal wiring 2 (information display unit 12) are insulated by the insulating film 13. For this reason, since electrons are not supplied from the metal wiring 2 (information display unit 12) to the organic light emitting layer 4, light emission of the organic light emitting layer 4 is suppressed on the back surface 2d side of the metal wiring 2 (information display unit 12). .
Even if light emission occurs on the back side of the metal wiring 2 (information display unit 12), the light does not pass through the metal wiring 2 (information display unit 12), so that the light amount is lost. Therefore, the injected current is efficiently used for light emission.

As shown in FIG. 10E, the organic EL element 100 according to the eighth modification is obtained by adding an insulating film 14 to the organic EL element 80 according to the sixth modification.
The insulating film 14 is provided on the back surface 2d of the metal wiring 2 (information display unit 12) so as to be stacked in the range of the shape of the metal wiring 2 (information display unit 12) in plan view. Thereby, the whole back surface 2d of the metal wiring 2 (information display part 12) is coat | covered.
The material of the insulating film 14 is not particularly limited as long as it has an insulating property, but a preferable example is a resist having an electrical insulating property.

In such an organic EL element 100, the first electrode portion 83 is formed on the entire surface of the second surface 1 b of the translucent substrate 1 in the same manner as in the sixth modified example, and then the first electrode portion 3 is formed on the first electrode portion 3. It can be manufactured in the same manner as in the first embodiment except that the metal wiring 2 (information display unit 12) and the insulating film 14 are laminated.
At this time, in the present modification, when a resist is used as the insulating film 14, the insulating film 14 can be formed by a resist material applied when patterning the metal wiring 2 (information display unit 12).
That is, a resist to be the insulating film 14 is applied to the conductive metal layer M, the conductive metal layer M is patterned by photolithography, and then the resist remaining on the metal wiring 2 (information display unit 12) is removed. Instead, the organic light emitting layer 4 is laminated.
In this way, the insulating film 14 made of resist is formed so as to match the shape of the metal wiring 2 (information display unit 12) in plan view.

According to this modification, the organic light emitting layer 4 and the metal wiring 2 (information display part 12) not shown are insulated by the insulating film 14 as in the seventh modification. For this reason, electrons are not supplied to the organic light emitting layer 4 from the back surface 2d of the metal wiring 2 (information display unit 12). Therefore, the organic light emitting layer 4 emits light on the back surface 2d side of the metal wiring 2 (information display unit 12). It is suppressed.
For this reason, as in the seventh modified example, useless light emission is suppressed, so that the injected current is efficiently used for light emission.
However, in this modification, compared with the manufacturing process of the seventh modification, the resist removing process and the process of newly forming the insulating film 14 after removing the resist can be omitted. Costs can be further reduced.
Further, since the insulating film 14 has no possibility of protruding on the translucent electrode portion 3, only the back surface 2 d of the metal wiring 2 (information display portion 12) is covered, and electrons from the translucent electrode portion 3 are covered. Supply is not hindered and light can be emitted more efficiently.

  In the above description of the embodiment and each modification, the example in which the conductive metal layer is patterned by photolithography has been described. However, if the metal wiring and the information display unit can be patterned, by means other than photolithography, Patterning is also possible. For example, a combination of lift-off and plating treatment may be used.

In the above description of the embodiment and each modification, the example in the case where the fine line pattern of the metal wiring has a parallel lattice shape has been described, but the fine line pattern is not limited to this. For example, a two-dimensional lattice pattern formed by extending parallel lines in two axial directions is also possible.
Further, the arrangement pitch of the metal wiring is not limited to an equal pitch. For example, it is possible to reduce the arrangement pitch of the portions where the electric resistance such as the central portion of the first electrode portion is likely to increase.

  Moreover, all the components described above can be implemented by appropriately changing or deleting the combination within the scope of the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 Translucent board | substrate 2 Metal wiring 2a Thin wire | line part wiring 2b Frame part wiring 3, 63, 73, 83 1st electrode part (translucent conductive film)
4 Organic Light-Emitting Layer 5 Second Electrode Unit 6 Light Diffuser 7 Translucent Conductive Substrate 8 Camera 8b Image Sensor 8c Visible Light Cut Filter 9 Image Processing Devices 10, 20, 30, 40, 50, 60, 70, 80, 90 , 100 Organic EL elements 12, 22, 32, 42, 52 Information display section 12A Bar code symbol section (information reading pattern, reading code symbol)
22a Character pattern (information reading pattern)
12B Character part (information reading pattern)
13, 14 Insulating film 22b Margin portion 32a QR code portion (information reading pattern, reading code symbol)
42a Inverted QR code part (information reading pattern, reading code symbol)
52a Dot (information reading pattern)
L _IR infrared light L _v visible light M conductive metal layer

Claims (8)

A translucent substrate;
A first electrode portion formed of a light-transmitting conductive film laminated on the light-transmitting substrate;
Metal wiring provided in contact with the translucent conductive film by patterning a conductive metal layer;
An organic light emitting layer laminated on the first electrode part;
A second electrode portion disposed opposite to the first electrode portion with the organic light emitting layer interposed therebetween;
A light diffuser disposed on the opposite side of the organic light emitting layer with the first electrode portion interposed therebetween, and having a light diffusibility with respect to visible light;
It has an information reading pattern formed of a material that reflects infrared light, is disposed between the organic light emitting layer and the light diffuser, and is provided at a position where infrared light can enter and exit through the light diffuser. Displayed information display part,
An organic EL device comprising: The information reading pattern of the information display unit is:
The organic EL element according to claim 1, wherein the conductive metal layer is provided by patterning. The metal wiring is
Within a rectangular region, it has a fine line pattern in which fine lines extending in one direction are arranged in parallel,
The information reading pattern of the information display unit is:
The organic EL element according to claim 1, wherein at least a part of the organic EL element is disposed in the rectangular region. The information reading pattern is:
One or more patterns selected from a manufacturing unique number composed of at least one of letters, symbols, and numerals, a reading code symbol representing the manufacturing unique number, and a logo mark are provided. Item 4. The organic EL device according to any one of Items 1 to 3. A translucent conductive substrate used for an organic EL element,
A translucent substrate;
A light-transmitting conductive film laminated on the light-transmitting substrate;
Metal wiring provided in contact with the translucent conductive film by patterning a conductive metal layer;
An information display unit having an information reading pattern that is provided in contact with the translucent conductive film and formed of a material that reflects infrared light;
A translucent conductive substrate comprising: The information reading pattern of the information display unit is:
The translucent conductive substrate according to claim 5, wherein the conductive metal layer is provided by patterning. The metal wiring is
Within a rectangular region, it has a fine line pattern in which fine lines extending in one direction are arranged in parallel,
The information reading pattern of the information display unit is:
The translucent conductive substrate according to claim 5, wherein at least a part is disposed in the rectangular region. The information reading pattern is:
One or more patterns selected from a manufacturing unique number composed of at least one of letters, symbols, and numerals, a reading code symbol representing the manufacturing unique number, and a logo mark are provided. Item 8. The translucent conductive substrate according to any one of Items 5 to 7.

Images