JP2016018698A - Organic el element and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to extract collimated light or diffused light by switching a light emitting portion.SOLUTION: The organic EL element makes it possible to extract collimated light or diffused light by switching separately therebetween, by having a lens sheet 7 in which collimated light areas 7p for extracting collimated light and diffused light areas 7d for extracting diffused light are alternately arranged as a stripe shaped area and light emitting areas 2p, 2d respectively provided by corresponding to the collimated light areas and the diffused light areas.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an organic EL element and a method for manufacturing the same, and more particularly to a technique suitable for use in an organic electroluminescence element that can be switched to parallel light or diffused light.

In general, an organic EL (Electro-Luminescence) element has a structure in which a light-emitting layer containing a fluorescent or phosphorescent organic compound is sandwiched between an anode and a cathode on a light-transmitting substrate. Then, a DC voltage is applied to the anode and the cathode, electrons and holes are injected into the light emitting layer and recombined to generate excitons, and light emission when the excitons are deactivated is used. Leads to light emission.

Conventionally, in these organic EL elements, when the light emitted from the light emitting layer is emitted from the translucent substrate, there is a problem that the light is totally reflected on the translucent substrate and the light is lost. The light extraction efficiency at this time is generally said to be about 20%. Therefore, there is a problem that the higher the luminance is, the more input power is required. This increases the load on the element and lowers the reliability of the element itself.

In order to improve the external extraction efficiency of light, a method has been proposed in which fine irregularities are formed on an element substrate and a light beam lost due to total reflection is extracted to the outside. For example, it has been proposed to form a microlens array in which a plurality of microlenses are arranged in a plane on one surface of a translucent substrate. Patent Documents 1 and 2 describe examples in which a light extraction film having a microlens is attached to the outermost surface of the organic EL element to improve luminance and further extract light with higher diffusibility.

JP 2011-216414 A JP 2012-195174 A

  If the above film is stretched once, only the light that is unique to the film will be taken out.Specifically, only the parallel light can be taken out from the film that takes out the parallel light, and from the film that takes out the diffused light. Since only diffused light can be extracted, there is a demand for switching out these lights.

  The present invention has been made in view of the above circumstances, and is intended to achieve the object of enabling to switch out parallel light or diffused light without accompanying film replacement in an organic electroluminescence element. is there.

The organic EL element of the present invention is a striped region in which a parallel light region for extracting parallel light and a diffused light region for extracting diffused light are arranged alternately, the parallel light region and the diffused light region. The above-mentioned problems have been solved by having the light emitting regions provided corresponding to each of the above and being able to switch and extract the parallel light and the diffused light separately.
The present invention preferably has a light shielding pattern that can be switched between the parallel light region and the diffused light region.
The lens sheet of the present invention may be a lenticular sheet in which lenses having cylindrical shapes having different focal lengths in the parallel light region and the diffused light region are arranged.
In the present invention, it is preferable that the light emitting portion can be switched corresponding to each of the parallel light region and the diffused light region.
In the present invention, the switchable light emitting part may be a light emitting line having a stripe shape and a non-light emitting line.
The light emitting part of the present invention is provided with a light emitting side lenticular sheet provided with a lens having a cylindrical shape having an equal focal length corresponding to each of the light emitting parts,
The light emitting side lenticular sheet and the lenticular sheet may be arranged to face each other so that the lens of the lenticular sheet corresponds to the lens of the light emitting side lenticular sheet.
In the present invention, the parallel light regions and the diffused light regions may be alternately arranged.
The organic EL device manufacturing method of the present invention includes a lens sheet in which parallel light regions for extracting parallel light and diffused light regions for extracting diffused light are alternately arranged as stripe regions, the parallel light region, A light emitting region provided corresponding to each of the diffused light region,
The lens sheet is a lenticular sheet provided with a lens having a cylindrical shape having different focal lengths in the parallel light region and the diffused light region,
It has a light-shielding pattern that can be switched between the parallel light region and the diffused light region, and is a method of manufacturing an organic EL element that can switch and extract the parallel light and the diffused light separately,
(A) a step of forming an ionizing radiation curable resin layer having adhesiveness in an uncured state on a flat surface of a lenticular sheet in which cylindrical lenses are arranged side by side and the other surface is a flat surface;
(B1) While moving the ionizing radiation source corresponding to the parallel light and the lenticular sheet relative to each other in the direction in which the cylindrical lenses are arranged side by side, strip-like parallel light beams extending in the longitudinal direction of the cylindrical lenses are Irradiating perpendicularly to the flat surface of the lenticular sheet from, and curing the portion collected by each cylindrical lens of the resin layer,
(B2) While moving the ionizing radiation source corresponding to the diffused light and the lenticular sheet relative to each other in the direction in which the cylindrical lenses are arranged side by side, Irradiating perpendicularly to the flat surface of the lenticular sheet from, and curing the portion collected by each cylindrical lens of the resin layer,
(C) a step of superimposing a transfer sheet having a black colored layer formed on the entire surface of the resin surface on the colored layer side;
(D) Using the viscosity of the uncured portion of the resin layer, the colored layer is attached only to the uncured portion, and the cured portion of the colored layer is peeled off from the lens sheet, thereby uncured other than the cured portion. Forming a black layer on the resin surface in a state, and forming a light shielding pattern corresponding to the parallel light and the diffused light on the flat surface;
Including a step of forming a light shielding pattern of the lenticular sheet.

  The organic EL element of the present invention is a striped region in which a parallel light region for extracting parallel light and a diffused light region for extracting diffused light are arranged alternately, the parallel light region and the diffused light region. And the parallel light region for extracting the parallel light and the diffusion for extracting the diffused light. It is possible to provide an organic EL element that is arranged in parallel with the light region and that can be switched and extracted separately between parallel light and diffused light simply by switching.

  The present invention has a light-shielding pattern that can be switched between the parallel light region and the diffused light region, so that the light emitting region corresponding to the parallel light region and the light emitting region corresponding to the diffused region are switched. Even if light from the light emitting region corresponding to the parallel light region enters the diffused light region or light from the light emitting region corresponding to the parallel light region enters the diffused region, these are sufficiently shielded and parallel Parallel light and diffused light are not mixed in the light region and the diffused light region, and these can be switched and extracted.

  The lens sheet according to the present invention is a lenticular sheet in which lenses having cylindrical shapes having different focal lengths in the parallel light region and the diffused light region are arranged, so that the lens is made into a parallel light region and a diffused light region. In addition, the parallel light and the diffused light can be separately switched and extracted by simply switching the light incident from the light emitting region.

  In the present invention, since the light emitting part can be switched corresponding to each of the parallel light region and the diffused light region, the parallel light and the diffused light can be simply switched between the parallel light region and the diffused light region. And can be taken out separately.

  In the present invention, the switchable light-emitting portion is formed as a light-emitting line and a non-light-emitting line having a stripe shape, so that the light-emitting line can be easily made with respect to the lens of the lenticular sheet that becomes the parallel light region and the diffused light region. Corresponding to the above, it is possible to switch between the parallel light and the diffused light by simply switching the light emitting region having the stripe shape.

The light emitting part of the present invention is provided with a light emitting side lenticular sheet provided with a lens having a cylindrical shape having an equal focal length corresponding to each of the light emitting parts,
The light emitting side lenticular sheet and the lenticular sheet are arranged to face each other so that the lens of the lenticular sheet and the lens of the light emitting side lenticular sheet correspond to each other. By entering light into the parallel light region and the diffused light region of the corresponding lenticular sheet via the side lenticular sheet, it is possible to switch between parallel light and diffused light.

  In the present invention, the parallel light region and the diffused light region are alternately arranged, so that the parallel light and the diffused light are easily switched while the in-plane luminance distribution of the organic EL element is kept uniform. It becomes possible.

The organic EL device manufacturing method of the present invention includes a lens sheet in which parallel light regions for extracting parallel light and diffused light regions for extracting diffused light are alternately arranged as stripe regions, the parallel light region, A light emitting region provided corresponding to each of the diffused light region,
The lens sheet is a lenticular sheet provided with a lens having a cylindrical shape having different focal lengths in the parallel light region and the diffused light region,
It has a light-shielding pattern that can be switched between the parallel light region and the diffused light region, and is a method of manufacturing an organic EL element that can switch and extract the parallel light and the diffused light separately,
(A) a step of forming an ionizing radiation curable resin layer having adhesiveness in an uncured state on a flat surface of a lenticular sheet in which cylindrical lenses are arranged side by side and the other surface is a flat surface;
(B1) While moving the ionizing radiation source corresponding to the parallel light and the lenticular sheet relative to each other in the direction in which the cylindrical lenses are arranged side by side, strip-like parallel light beams extending in the longitudinal direction of the cylindrical lenses are Irradiating perpendicularly to the flat surface of the lenticular sheet from, and curing the portion collected by each cylindrical lens of the resin layer,
(B2) While moving the ionizing radiation source corresponding to the diffused light and the lenticular sheet relative to each other in the direction in which the cylindrical lenses are arranged side by side, Irradiating perpendicularly to the flat surface of the lenticular sheet from, and curing the portion collected by each cylindrical lens of the resin layer,
(C) a step of superimposing a transfer sheet having a black colored layer formed on the entire surface of the resin surface on the colored layer side;
(D) Using the viscosity of the uncured portion of the resin layer, the colored layer is attached only to the uncured portion, and the cured portion of the colored layer is peeled off from the lens sheet, thereby uncured other than the cured portion. Forming a black layer on the resin surface in a state, and forming a light shielding pattern corresponding to the parallel light and the diffused light on the flat surface;
Including the step of forming a light shielding pattern of the lenticular sheet, the light shielding pattern in which the parallel light region and the diffused light region in a stripe shape necessary for switching between parallel light and diffused light are formed, It can be easily manufactured with high accuracy.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to show the effect that the organic EL element which can take out by switching parallel light or diffused light by switching a light emission site | part can be provided.

1 is a schematic cross-sectional view showing a first embodiment of an organic EL element according to the present invention. It is sectional drawing which shows the state switched to the parallel light irradiation state in 1st Embodiment of the organic EL element which concerns on this invention. It is sectional drawing which shows the state switched to the diffused light irradiation state in 1st Embodiment of the organic EL element which concerns on this invention. It is a flowchart which shows the manufacturing process in 1st Embodiment of the organic EL element which concerns on this invention. It is a schematic cross section which shows the manufacturing process in 1st Embodiment of the organic EL element which concerns on this invention. It is a schematic cross section which shows the manufacturing process in 1st Embodiment of the organic EL element which concerns on this invention. It is a schematic cross section which shows the manufacturing process in 1st Embodiment of the organic EL element which concerns on this invention. It is a schematic cross section which shows the manufacturing process in 1st Embodiment of the organic EL element which concerns on this invention. It is a schematic cross section which shows the manufacturing process in 1st Embodiment of the organic EL element which concerns on this invention.

Hereinafter, a first embodiment of an organic EL element according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an organic EL element in the present embodiment. In the figure, reference numeral 1 denotes an organic EL element.

The organic EL element 1 according to the present embodiment can be taken out by switching between parallel light and diffused light separately.
As shown in FIG. 1, in the organic EL element 1, an anode 3 and a cathode 4 are arranged between a first substrate 1A and a second substrate 1B constituting a light-transmitting substrate with a light emitting layer 2 interposed therebetween. The light-emitting side lenticular sheet 5 is disposed on the surface of the first substrate 1A opposite to the light-emitting layer 2, and constitutes the light-emitting structure 6, and faces the light-emitting side lenticular sheet 5. A lenticular sheet 7 is provided, and a light-shielding pattern 8 is provided on the lenticular sheet 7 to form a light control sheet (lens sheet) 9.
In the light control sheet 9, light is emitted to the side opposite to the surface on which the light emitting layer 2 is installed, and this direction is defined as an irradiation direction F.

The anode 3 is disposed on the surface of the light emitting layer 2 on the light control sheet 9 side, and the cathode 4 is disposed on the opposite surface. The light emitting layer 2 emits light by applying a voltage to the anode 3 and the cathode 4. The light emitting layer 2, the anode 3 and the cathode 4 constitute a light emitting structure 6 as a light source. As the light emitting structure 6, various conventionally known configurations can be adopted.
The light emitting layer 2 may be a white light emitting layer, or may be a blue, red, yellow, green or other light emitting layer. In the case of a white light emitting layer, the structure of the light emitting layer 2 is, for example, CuPc (copper phthalocyanine) / α-NPD doped with rubrene 1% / dinactylanthracene perylene 1% doped / Alq 3 / lithium fluoride. To do. What is necessary is just to use indium tin oxide called ITO as the anode 3 arrange | positioned before and behind, and Al as the cathode 4. FIG.

However, the present invention is not limited to this configuration, and an arbitrary configuration using an appropriate material capable of setting the wavelength of light emitted from the light emitting layer 2 to R (red), G (green), and B (blue). It is possible to adopt. Moreover, when using it for the application of a full color display, full color display is attained by making it separately coat | cover with three types of luminescent materials corresponding to R, G, and B, or overlapping a color filter on white light.

The first substrate 1A is disposed between the anode 3 and the light control sheet 8, and the second substrate 1B is disposed on the surface of the cathode 4 opposite to the light emitting layer 2.
As materials for the first substrate 1A and the second substrate 1B, various glass materials can be used. In addition, a plastic material such as PMMA, polycarbonate, polystyrene, or a metal material such as aluminum can be used. Although various other materials can be used, a cycloolefin polymer is particularly preferable as the material of the first substrate 1A and the second substrate 1B. This polymer is excellent in all of the material properties necessary for the first substrate 1A and the second substrate 1B, such as processability, heat resistance, water resistance, and optical translucency.
In addition, the first substrate 1A is preferably formed of a material capable of making the total light transmittance 50% or more so that light emitted from the light emitting structure 10 can be transmitted as much as possible.

  The light-emitting side lenticular sheet 5 is integrally formed of a sheet-like base layer 5a and a structural layer 5b made of a condensing lens group formed on the base layer 5a. The structural layer 5b enables switching between parallel light and scattered light corresponding to the structural layer 7b of the lenticular sheet 7 as will be described later. As the light emitting side lenticular sheet 5, a transparent thermoplastic resin such as acrylic, vinyl chloride, or carbonate may be molded by any method, or an ionizing radiation curable type such as a UV curable resin or an EB curable resin. It may be made of a cured product of the resin using a resin.

  The light-emitting side lenticular sheet 5 is fixed to the first substrate 1A via an adhesive layer 5c made of an adhesive. Examples of the adhesive / adhesive constituting the adhesive layer 5c include acrylic, urethane, rubber, and silicone adhesives. In any case, since the adhesive layer 5c is used adjacent to the light emitting structure 6 that becomes high in temperature, it is desirable that the storage elastic modulus G ′ is 1.0E + 04 (Pa) or more at 100 ° C. If the value of the storage elastic modulus G ′ is lower than this, there is a possibility that the light-emitting side lenticular sheet 5 and the first substrate 1 </ b> A are displaced during use. If the light-emitting side lenticular sheet 5 and the first substrate 1A are greatly deviated, the light emitted from the light-emitting layer 2 is not efficiently incident on the light-emitting side lenticular sheet 5, so that the light use efficiency is reduced and scattering described later. Switching between light and parallel light cannot be performed accurately.

In order to stably secure a gap between the light emitting layer 2 and the light emitting side lenticular sheet 5, transparent fine particles such as beads may be mixed in the contact / adhesive layer constituting the adhesive layer 5c. The adhesive layer 5c may be a double-sided tape or may be formed as a single layer.
The light-emitting side lenticular sheet 5 deflects the light from the light-emitting layer 2 and emits it in the irradiation direction F to improve the external extraction efficiency of the light, and also has a light extraction function paired with the lenticular sheet 7 as will be described later. Have.

The lenticular sheet 7 is integrally formed of a sheet-like base layer 7a and a structural layer 7b composed of a light control lens group formed on the base layer 7a. As the lenticular sheet 7, a transparent thermoplastic resin such as acrylic, vinyl chloride, or carbonate may be molded by any method, or an ionizing radiation curable resin such as a UV curable resin or an EB curable resin may be used. It may consist of a cured product of the resin used. The lenticular sheet 7 is provided so that the structural layer 7 b faces the structural layer 5 b of the light-emitting side lenticular sheet 5.
In the structural layer 7b of the lenticular sheet 7, lenses 7p and lenses 7d having cylindrical shapes having different focal lengths are alternately arranged in a stripe shape.

On the base layer 7 a of the lenticular sheet 7, a light shielding pattern 8 that can be switched between a parallel light region and the diffused light region is provided.
In the light shielding pattern 8, parallel light regions 8p that mainly extract parallel light and diffused light regions 8d that mainly extract diffused light are arranged in stripes alternately.

As shown in FIG. 1, the light emitting layer 2 includes a parallel light region 2p for extracting parallel light and a diffused light region 2d for extracting diffused light as stripe-shaped light emitting regions extending in the y direction which is the in-plane direction of the substrate 1A. Are alternately arranged in the x direction, and the light emission lines that are the portions that emit light in the parallel light region 2p and the diffused light region 2d can be switched.
In the structural layer 5b of the light-emitting side lenticular sheet 5, cylindrical lenses 5d and 5p having the same focal length are disposed so as to correspond to the parallel light region 2p and the diffused light region 2d, respectively. The focal lengths of the lenses 5d and 5p are set so that the light emitted from the parallel light region 2p and the diffused light region 2d is isotropic, so that the light is emitted as substantially parallel light from the light-emitting side lenticular sheet 5. The

The lens 7p of the lenticular sheet 7 is disposed at a position where the parallel light region 2p is incident, and the lens 7d is disposed at a position where the diffused light region 2d is incident. 7p and lens 7d are alternately arranged in the x direction.
The point distance of the lens 7p of the lenticular sheet 7 is such that the light incident from the lens 5p of the light-side lenticular sheet 5 can be irradiated in the z direction (irradiation direction F) when the parallel light region 2p is turned on. Is set.
The point distance of the lens 7d of the lenticular sheet 7 is such that the light incident from the lens 5d of the light-side lenticular sheet 5 when the diffused light region 2d is lit can be irradiated in the z direction (irradiation direction F). Is set as follows.

The parallel light region 8p of the light shielding pattern 8 is formed so that the light incident from the lens 7p of the lenticular sheet 7 when the parallel light region 2p of the light emitting layer 2 is lit can be irradiated in the z direction (irradiation direction F, The opening shape is set so that light other than the above can be blocked.
The diffused light region 8d of the light shielding pattern 8 can irradiate the light incident from the lens 7d of the lenticular sheet 7 when the diffused light region 2d of the light emitting layer 2 is lit as the diffused light in the z direction (irradiation direction F). The opening shape is set so that other light can be blocked.

The organic EL element 1 in the present embodiment is a region formed in stripes extending in the y direction in the light emitting layer 2, the light emitting side lenticular sheet 5, the lenticular sheet 7, and the light shielding pattern 8. The parallel light regions 2p, 5p, 7p, and 8p for extracting the diffused light are stacked so as to be arranged at the corresponding thickness direction positions. Similarly, the diffused light regions 2d, 5d, 7d, and 8d for extracting the diffused light are Are stacked so as to be arranged at corresponding positions in the thickness direction,
These parallel light regions 2p, 5p, 7p, and 8p and the diffused light regions 2d, 5d, 7d, and 8d are alternately arranged in the x direction.

  When the parallel light region 2p of the light emitting layer 2 is turned on, as shown in FIG. 2, the parallel light region 2p of the light emitting layer 2, the parallel light region 5p of the light emitting side lenticular sheet 5, and the parallel light region 7p of the lenticular sheet 7 are obtained. The parallel light can be irradiated through the parallel light region 8p of the light shielding pattern 8.

  When the diffused light region 2d of the light emitting layer 2 is turned on, as shown in FIG. 3, the diffused light region 2d of the light emitting layer 2, the diffused light region 5d of the light emitting side lenticular sheet 5, and the diffused light region 7d of the lenticular sheet 7 are obtained. The diffused light can be irradiated through the diffused light region 8d of the light shielding pattern 8.

  Hereinafter, the manufacturing method of the organic EL element in this embodiment is demonstrated.

In the present embodiment, as for the light emitting structure 6, various types of conventionally known structures can be used as long as the parallel light region 2p and the diffused light region 2d of the light emitting layer 2 can be switched in a stripe shape. Therefore, the manufacturing of the light control sheet 9 will be described below.
FIG. 4 is a flowchart showing a manufacturing process of the light control sheet (lens sheet) 9 in the method of manufacturing the organic EL element of this embodiment, and FIGS. 5 to 9 are light control sheets (in the method of manufacturing the organic EL element of this embodiment). It is a schematic cross section which shows the manufacturing process of the lens sheet | seat.

  In the manufacture of the light control sheet (lens sheet) 9 in the present embodiment, as shown in FIG. 5, an ionizing radiation curable resin layer forming step Sa, a parallel light corresponding resin layer curing step Sb1, and a diffused light corresponding resin layer. It has the process of forming the light-shielding pattern 8 of the lenticular sheet 7 including the hardening process Sb2, the transfer sheet superimposition process Sc, and the light-shielding stripe pattern formation process Sd.

In the ionizing radiation curable resin layer forming step Sa, as shown in FIG. 5, a lenticular sheet 7 is prepared in which cylindrical lenses 7d and 7p each having a predetermined focal length are arranged in parallel on one side and the other side is a flat surface. Then, an ionizing radiation curable resin layer 8B having adhesiveness in an uncured state is formed on the flat surface, and a protective layer 8C is formed thereon.
As the lenticular sheet 7, a transparent thermoplastic resin such as acrylic, vinyl chloride, or carbonate may be molded by any method, or an ionizing radiation curable resin such as a UV curable resin or an EB curable resin may be used. It may consist of a cured product of the resin used. In this embodiment, the following can be used as an example.

<Lenticular sheet> A cylindrical lens group made of a cured product of a UV curable resin (material: epoxy acrylate) on a transparent substrate (material: acrylic) having a thickness of 1.0 mm. Pitch 0.4mm, spherical radius 0.35mm, lens thickness 0.063mm and 0.0315mm, size 120cm × 90cm
<Photopolymer> Chromaline film (DuPont product name)
<Protective layer> Mylar film (DuPont brand name)

  In the parallel light corresponding resin layer curing step Sb1, as shown in FIG. 6, the uncured resin layer (photopolymer) 8B is exposed to ionizing radiation (ultraviolet rays) from the cylindrical lens 7p side. At this time, while moving the lenticular sheet 7 in the direction in which the cylindrical lenses 7p are arranged side by side, the strip-shaped parallel rays (hereinafter referred to as parallel slit light) extending in the longitudinal direction of the cylindrical lenses 7p (direction perpendicular to the paper surface in FIG. 6). 13p) is irradiated perpendicularly to the flat surface of the lenticular sheet 7 from the cylindrical lens 7p side. The light emitted from the light source 11 of ionizing radiation (ultraviolet rays) enters the lenticular sheet 7 perpendicularly as parallel slit light 13 p that has passed through the opening 12 p of the mask 12. At this time, the opening 12p of the mask 12 is provided at a position corresponding to the parallel light from the parallel light region 2p of the light emitting layer 2, and the parallel slit light 13p is applied only to a region corresponding to the parallel light region 8p of the light shielding pattern 8. Irradiate. The opening 12p of the mask 12 may be provided with a shutter or the like that can set the irradiation time and irradiation direction of ionizing radiation (ultraviolet rays).

<Exposure conditions>
Light source used… Near UV mercury lamp (output 13kW, 120W / cm)
Moving speed: 2 cm / sec Only the region corresponding to the parallel light region 8p of the resin layer 8B collected by the lens function of the cylindrical lens is cured, and this portion (hatched portion) is made non-adhesive. The resin layer 8B in the portion (white portion) that is not condensed by the lens function remains sticky.

  In the diffused light corresponding resin layer curing step Sb2, as shown in FIG. 7, the uncured resin layer (photopolymer) 8B partially cured by the parallel light corresponding resin layer curing step Sb1 is attached to the cylindrical lens 7d side. More exposure to ionizing radiation (ultraviolet rays). At this time, while moving the lenticular sheet 7 in the direction in which the cylindrical lenses 7d are juxtaposed, a strip-shaped diffused light (hereinafter referred to as diffusion slit light) extending in the longitudinal direction of the cylindrical lens 7d (direction perpendicular to the paper surface in FIG. 7). 13d) is irradiated perpendicularly to the flat surface of the lenticular sheet 7 from the cylindrical lens 7d side. The light emitted from the light source 11 of ionizing radiation (ultraviolet rays) enters the lenticular sheet 7 perpendicularly as diffusion slit light 13 d that has passed through the opening 12 d of the mask 12. At this time, the opening 12d of the mask 12 is provided at a position corresponding to the diffused light from the diffused light region 2d of the light emitting layer 2, and the diffusion slit light 13d is applied only to the region corresponding to the diffused light region 8d of the light shielding pattern 8. Irradiate. The opening 12b of the mask 12 may be provided with a shutter or the like that can set the irradiation time and irradiation direction of ionizing radiation (ultraviolet rays).

<Exposure conditions>
Light source used… Near UV mercury lamp (output 13kW, 120W / cm)
Movement speed: 2 cm / sec Only the region corresponding to the diffused light region 8d of the resin layer 8B collected by the lens function of the cylindrical lens is cured, and this portion (hatched portion) is made non-adhesive. The resin layer 8B in the portion (white portion) that is not condensed by the lens function remains sticky.

  In this embodiment, by setting the shape of the opening of the mask 12 in advance, the parallel slit light 13p and the diffusion slit light 13d can be irradiated simultaneously, so that the parallel light corresponding resin layer curing step Sb1 and the diffuse light compatible resin can be performed. It is also possible to perform the layer curing step Sb2 at the same time.

  Further, in the present embodiment, the arrangement of the openings 12p and 12d of the mask 12 is made equivalent to the arrangement in the thickness direction of the light emitting layer 2 of the organic EL element, and the in-plane direction arrangement of the light emitting layer 2 is parallel light of the light emitting layer 2. It is the same as the arrangement of the area 2 and the diffused light area 2d, and a lens sheet equivalent to the light-emitting side lenticular sheet 5 is placed facing the lens 7p, 7d side of the lenticular sheet 7 and is emitted from the ionizing radiation (ultraviolet) light source 11. It is also possible to irradiate the ionizing radiation (ultraviolet rays) perpendicularly to the flat surface of the lenticular sheet 7.

In the transfer sheet superimposing step Sc and the light shielding stripe pattern forming step Sd, the protective layer 8C on the resin layer 8B is peeled off, and the resin layer 8B (white portion) in an adhesive state is colored black by a desired method. .
As a coloring method, as shown in FIG. 8, carbon black black toner 14 is spread over the entire flat surface, and as shown in FIG. 9, black is spread over the non-adhesive resin layer 8B (hatched portion). Remove toner.
Alternatively, as shown in FIG. 8, the transfer ink layer (black) 14 of the transfer sheet is superimposed on the resin layer 8B, and the ink layer 14 is transferred and formed only on the adhesive resin layer 8B (hatched portion). As shown in FIG. 9, a method that does not transfer the ink layer to the non-adhesive resin layer 8B is possible. In the case of the method, it is also effective to use the transfer sheet instead of the protective layer 8C.

Next, the resin layer 8B is completely cured by irradiating the entire surface of the resin layer 8B with ionizing radiation. Alternatively, in order to prevent the formed light shielding pattern (ink layer) 14 from peeling, a photosensitive film is laminated on the light shielding pattern 8, and the film is cured by irradiating with ionizing radiation, and the protective layer shown in FIG. It may be 8A.
In this way, in the transfer sheet superimposing step Sc and the light shielding stripe pattern forming step Sd, the transfer sheet on which the black colored layer 14 is formed is superimposed on the entire surface of the resin layer 8B, and the colored layer 14 is replaced with the resin layer. By using the viscosity of the uncured portion, the black layer is adhered to the uncured portion, and the colored layer of the cured portion is peeled off from the lens sheet 8B, so that the black layer Then, the light shielding stripe pattern 8 corresponding to the parallel light and the diffused light is formed on the flat surface.
After forming the protective layer 8 </ b> A, the light control sheet 9 is laminated with the light emitting structure 6 to manufacture the organic EL element 1.

  In the present embodiment, since the light-shielding pattern to be formed is a non-condensing part by irradiation with ionizing radiation to an actual lenticular sheet, a certain position is surely provided at a place where the light-shielding pattern needs to be truly formed. Pattern formation can be performed with high accuracy.

Examples according to the present invention will be described below.
As in the embodiment, when the organic EL element is manufactured, the power supplied to the light emitting layer 2 is switched between the parallel light region 2p and the parallel light region 2d, and the light emitting line and the non-light emitting line are turned on alternately. As shown in FIG. 2 and FIG. 3, parallel light (FIG. 2) or diffused light (FIG. 3) was successfully extracted by switching the light emitting site.

  As an application example of the present invention, it can be used as a configuration using an organic EL element that can extract parallel light or diffused light by switching a light emitting part through a lenticular sheet having a lens having a cylindrical structure.

DESCRIPTION OF SYMBOLS 1 ... Organic EL element 7 ... Lenticular sheet 5 ... Light emission side lenticular sheet 8B ... Ionizing radiation curable resin layer 8A ... Protective layer 9 ... Light control sheet 11 ... Ionizing radiation (ultraviolet light) light source 12 ... Mask 13p, 13d ... Slit light 8 ... light-shielding pattern 6 ... light-emitting structure 2 ... light-emitting layers 2p, 5p, 7p, 8p ... parallel light regions 2d, 5d, 7d, 8d ... diffused light regions

Claims (8)

  Provided as stripe regions corresponding to each of the parallel light region for extracting parallel light and the diffused light region for extracting diffused light, and the parallel light region and the diffused light region. An organic EL element, wherein the parallel light and the diffused light can be switched separately and taken out.   2. The organic EL element according to claim 1, further comprising a light shielding pattern that can be switched between the parallel light region and the diffused light region.   3. The organic EL element according to claim 1, wherein the lens sheet is a lenticular sheet having a cylindrical lens having different focal lengths in the parallel light region and the diffused light region.   4. The organic EL element according to claim 1, wherein a light emitting part can be switched corresponding to each of the parallel light region and the diffused light region. 5.   5. The organic EL element according to claim 4, wherein the switchable light emitting sites are a light emitting line and a non-light emitting line having a stripe shape. The light emitting part is provided with a light emitting side lenticular sheet provided with a cylindrical lens having an equal focal length corresponding to each light emitting part,
2. The light emitting side lenticular sheet and the lenticular sheet are arranged to face each other so that the lens of the lenticular sheet and the lens of the light emitting side lenticular sheet correspond to each other. To 5. The organic EL device according to any one of 5 to 5.   7. The organic EL element according to claim 1, wherein the parallel light region and the diffused light region are alternately arranged. Provided as stripe regions corresponding to each of the parallel light region for extracting parallel light and the diffused light region for extracting diffused light, and the parallel light region and the diffused light region. A light emitting region,
The lens sheet is a lenticular sheet provided with a lens having a cylindrical shape having different focal lengths in the parallel light region and the diffused light region,
It has a light-shielding pattern that can be switched between the parallel light region and the diffused light region, and is a method of manufacturing an organic EL element that can switch and extract the parallel light and the diffused light separately,
(A) a step of forming an ionizing radiation curable resin layer having adhesiveness in an uncured state on a flat surface of a lenticular sheet in which cylindrical lenses are arranged side by side and the other surface is a flat surface;
(B1) While moving the ionizing radiation source corresponding to the parallel light and the lenticular sheet relative to each other in the direction in which the cylindrical lenses are arranged side by side, strip-like parallel light beams extending in the longitudinal direction of the cylindrical lenses are Irradiating perpendicularly to the flat surface of the lenticular sheet from, and curing the portion collected by each cylindrical lens of the resin layer,
(B2) While moving the ionizing radiation source corresponding to the diffused light and the lenticular sheet relative to each other in the direction in which the cylindrical lenses are arranged side by side, Irradiating perpendicularly to the flat surface of the lenticular sheet from, and curing the portion collected by each cylindrical lens of the resin layer,
(C) a step of superimposing a transfer sheet having a black colored layer formed on the entire surface of the resin surface on the colored layer side;
(D) Using the viscosity of the uncured portion of the resin layer, the colored layer is attached only to the uncured portion, and the cured portion of the colored layer is peeled off from the lens sheet, thereby uncured other than the cured portion. Forming a black layer on the resin surface in a state, and forming a light shielding pattern corresponding to the parallel light and the diffused light on the flat surface;
Including a step of forming a light shielding pattern of the lenticular sheet.

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