JP2023113789A - Light emission system - Google Patents

Abstract

To make a member for attenuating light toward a side opposite to an emission side of a substrate inconspicuous in a region surrounding the member.SOLUTION: A substrate 200 has light-shielding ability. Specifically, the substrate 200 has an average transmittance of 5% or more and 50% or less for visible light over the whole substrate, i.e. in a range from a first portion 200a to a second portion 200b. A light-emitting device 10 overlaps with the first portion 200a of the substrate 200, and does not overlap with the second portion 200b of the substrate 200. The light-emitting device 10 has a plurality of light-emitting parts 142 and a plurality of translucent parts 144. The plurality of light-emitting parts 142 and the plurality of translucent parts 144 are arrayed to alternate. An adhesive layer 300 is located between the light-emitting device 10 and the substrate 200.SELECTED DRAWING: Figure 5

Description

The present invention relates to lighting systems.

In recent years, organic light-emitting diodes (OLEDs), particularly translucent OLEDs, have been developed as light-emitting devices. Patent Document 1 describes an example of a translucent OLED. The translucent OLED of Patent Document 1 has a plurality of light-emitting portions and a plurality of light-transmitting portions that are alternately arranged. Each light-emitting portion has a light-shielding electrode, and each light-transmitting portion does not overlap with the light-shielding electrode. Therefore, light from the outside of the translucent OLED can pass through the translucent portion.

Furthermore, in recent years, light-emitting systems using translucent OLEDs have been developed, and in particular, attaching translucent OLEDs to substrates (eg, glass) has been considered. Patent Literature 1 describes the use of a translucent OLED as a light source for a high mount stop lamp (HMSL) of an automobile. Specifically, in Patent Document 1, a rear window of an automobile is used as a base material, and a translucent OLED is attached to the rear window. The translucent OLED is positioned inside the vehicle body, and the light emitted from the translucent OLED is transmitted through the rear window and emitted to the outside of the vehicle body.

JP 2015-195173 A

Some light emitting systems require that the light emitted from the OLED be emitted from one side of the substrate (the light exit side). However, the inventors have found that in such a light emitting system, light may leak toward the opposite side of the substrate from the light exit side. The inventors have considered providing a lighting system with a component for attenuating such light, and have considered making this component unobtrusive relative to the area surrounding it.

One of the problems to be solved by the present invention is to make the member for attenuating the light directed to the side opposite to the light emitting side of the base material inconspicuous with respect to the area around the member. mentioned.

The invention according to claim 1,
a substrate including a first portion and a second portion;
a light-emitting device including a plurality of light-emitting portions and a plurality of light-transmitting portions that overlap the first portion of the base material and do not overlap the second portion of the base material and are arranged alternately;
an adhesive layer positioned between the light emitting device and the substrate;
with
the second portion of the substrate has an average transmittance of 5% or more and 50% or less for visible light;
The light-emitting device is a light-emitting system overlapping a region having an average transmittance of 5% to 50% for visible light.

1 is a plan view showing a light emitting system according to Embodiment 1. FIG. It is the figure which removed the light-emitting device from FIG. FIG. 2 is a plan view showing details of the light emitting device shown in FIG. 1; FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3; FIG. 2 is a cross-sectional view taken along line MM of FIG. 1; 6 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 5; FIG. It is a figure which shows the modification of FIG. 8 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 7; FIG. FIG. 5 is a cross-sectional view showing a light emitting system according to Embodiment 2; FIG. 10 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 9; FIG. FIG. 10 is a diagram showing a modification of FIG. 9; FIG. 12 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 11; FIG. 11 is a plan view showing a light emitting system according to Embodiment 3; FIG. 14 is a view of FIG. 13 with the colored film removed; FIG. 15 is a diagram in which the light emitting device 10 is removed from FIG. 14; FIG. 14 is a cross-sectional view taken along line MM of FIG. 13; 17 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 16; FIG. FIG. 17 is a diagram showing a modification of FIG. 16; 19 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 18; FIG. FIG. 12 is a cross-sectional view showing a light emitting system according to Embodiment 4; 21 is a cross-sectional view showing details of the light emitting device shown in FIG. 20; FIG. 21 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 20; FIG. FIG. 11 is a cross-sectional view showing a light emitting system according to Embodiment 5; 24 is a diagram for explaining an example of the operation of the light emitting system shown in FIG. 23; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In addition, in all the drawings, the same constituent elements are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

In the embodiments, the average visible light transmittance of a certain member (for example, the base material 200) means, for example, (1) or (2) below.
(1) The ratio of the luminance of white light after passing through the member to the luminance of white light before entering the member (2) Transmittance of the member for white light Average transmittance within the wavelength range of 400 nm or more and 750 nm or less in the spectrum

In embodiments, white light means, for example, (1) or (2) below.
(1) JIS Z 9112 daylight color, daylight white color, white color, warm white color, or incandescent color (2) Sunlight

(Embodiment 1)
FIG. 1 is a plan view showing a light emitting system 20 according to Embodiment 1. FIG. FIG. 2 is a diagram of FIG. 1 with the light emitting device 10 removed. FIG. 3 is a plan view showing details of the light emitting device 10 shown in FIG. 4 is a cross-sectional view taken along line AA of FIG. 3. FIG. FIG. 5 is a cross-sectional view along MM in FIG.

An overview of the light emitting system 20 will be described with reference to FIG. The light emitting system 20 includes a light emitting device 10, a substrate 200 and an adhesive layer 300. FIG. The substrate 200 includes a first portion 200a and a second portion 200b. The light emitting device 10 overlaps the first portion 200a of the substrate 200 and does not overlap the second portion 200b of the substrate 200 . The light-emitting device 10 has a plurality of light-emitting portions 142 and a plurality of light-transmitting portions 144, and the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 are arranged alternately. The adhesive layer 300 is located between the light emitting device 10 and the substrate 200 . The second portion 200b of the base material 200 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. The light emitting device 10 overlaps a region having a light shielding property, specifically, a region having an average transmittance of 5% or more and 50% or less for visible light. Particularly in the example shown in FIG. 5, this region is the first portion 200a of the substrate 200. As shown in FIG.

According to the above-described configuration, the member for attenuating the light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is made inconspicuous with respect to the area around the member. be able to. Specifically, in the configuration described above, the first portion 200a of the substrate 200 has a light-shielding property, and the light traveling toward the side opposite to the light emitting side (second surface 204 side) of the substrate 200 It functions as a member for attenuating the Furthermore, the area around the first portion 200a of the base material 200, that is, the second portion 200b of the base material 200 has a light shielding property. Accordingly, the color of the light emitting system 20 is substantially uniform across the substrate 200 from the first portion 200a to the second portion 200b. Thus, according to the above-described configuration, the member (the first portion 200a of the base material 200) for attenuating the light traveling toward the side opposite to the light emitting side (the second surface 204 side) of the base material 200 is provided. , it can be made inconspicuous with respect to the area around this member (the second portion 200b of the substrate 200).

In the example shown in FIGS. 1-5, the lighting system 20 is used in a high mounted stop lamp (HMSL) of an automobile. Specifically, the substrate 200 is the rear window of an automobile, and the light emitting device 10 functions as the light source of the HMSL of the automobile. Specifically, in the example shown in FIG. 5, the first side 202 of the substrate 200 faces the inside of the vehicle body and the second side 204 of the substrate 200 faces the outside of the vehicle body.

It should be noted that the method of use of the lighting system 20 is not limited to the examples shown in FIGS. 1-5 (ie, automotive HMSL). In other examples, lighting system 20 may be used in other indicator lights on automobiles. In still another example, the light emitting system 20 may be used not only for indicator lights of automobiles but also for indicator lights of mobile bodies (eg, vehicles (eg, trains), airplanes, or ships) on which people can board.

Next, details of the planar layout of the light emitting system 20 will be described with reference to FIGS. 1 and 2. FIG. 1 and 2, the substrate 200 is viewed from the inside of the vehicle body (first surface 202 (FIG. 5) side of the substrate 200).

The base material 200 has a light-shielding property. It has the following average transmittance. Therefore, the color of the base material 200 is substantially uniform over the entire base material 200, and specifically, it has a smoky color.

In the example shown in FIG. 1, the light-emitting device 10 (in other words, the first portion 200a) extends along one side of the substrate 200 and is positioned substantially in the center of this side of the substrate 200. In the example shown in FIG. The substrate 200 can be attached to the vehicle body so that one side thereof is positioned above the vehicle body. Therefore, the light emitting device 10 can be positioned above the vehicle body in the height direction of the vehicle body and substantially in the center of the vehicle body in the width direction of the vehicle body.

Next, details of the planar layout of the light emitting device 10 will be described with reference to FIG. The light-emitting device 10 comprises a substrate 100 and a light-emitting region 140 .

In the example shown in FIG. 3, the shape of the substrate 100 has a longitudinal direction, specifically a rectangle having a pair of long sides and a pair of short sides. Note that in other examples, the shape of the substrate 100 may be a shape other than a rectangle.

In the example shown in FIG. 3, the shape of the light emitting region 140 has a longitudinal direction, specifically a rectangle having a pair of long sides and a pair of short sides. Note that in other examples, the shape of the light emitting region 140 may be a shape other than a rectangle.

The light-emitting region 140 has a plurality of light-emitting portions 142 and a plurality of light-transmitting portions 144 . The plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 extend in the lateral direction of the light-emitting region 140 and are alternately arranged along the longitudinal direction of the light-emitting region 140 . In other words, the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 are arranged in stripes.

Next, details of the cross-sectional structure of the light emitting device 10 will be described with reference to FIG. The light emitting device 10 includes a substrate 100, a first electrode 110, an organic layer 120 and a second electrode . Particularly in the example shown in FIG. 4, the light emitting device 10 has a light emitting portion 142 and a light transmitting portion 144.

The substrate 100 has translucency. In one example, the substrate 100 contains glass or resin.

Substrate 100 has a first side 102 and a second side 104 . The first electrode 110 , the organic layer 120 and the second electrode 130 are positioned on the first surface 102 of the substrate 100 in order. The second side 104 is opposite the first side 102 .

The first electrode 110 has translucency and conductivity. In one example, the first electrode 110 includes an oxide semiconductor, more specifically, ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide).

The organic layer 120 can emit light through organic electroluminescence (EL). Organic layers 120 include, in one example, a hole injection layer (HIL), a hole transport layer (HTL), an emissive layer (EML), an electron transport layer (ETL) and an electron injection layer (EIL). In this example, holes are injected into the EML from the first electrode 110 through HIL and HTL, electrons are injected into the EML from the second electrode 130 through EIL and ETL, and holes and electrons are regenerated in the EML. When combined, light is emitted.

The second electrode 130 has a light shielding property, more specifically, a light reflecting property, and further has electrical conductivity. In one example, the second electrode 130 includes metal, more specifically at least one of Al, Ag and MgAg.

The light emitting section 142 is positioned on the first surface 102 side of the substrate 100 . The light emitting part 142 has a layered structure including the first electrode 110 , the organic layer 120 and the second electrode 130 in order from the first surface 102 of the substrate 100 . The light emitting unit 142 can emit light generated from the organic layer 120 by organic EL.

The translucent portion 144 is positioned between the adjacent light emitting portions 142 . The translucent portion 144 does not overlap the light shielding member, especially the second electrode 130 in the example shown in FIG. Therefore, light from the outside of the light emitting device 10 can pass through the translucent portion 144 .

The light emitting device 10 functions as a bottom emission. Specifically, the second electrode 130 has a light-shielding property, more specifically, a light-reflecting property, and the first electrode 110 has a light-transmitting property. Therefore, light emitted from the organic layer 120 passes through the first electrode 110 and the substrate 100 and is emitted from the second surface 104 of the substrate 100 . In other words, the second surface 104 of the substrate 100 functions as the light emitting surface of the light emitting device 10 .

The light emitting device 10 has translucency. Specifically, light from the outside of the light emitting device 10 can be transmitted from the first surface 102 side of the substrate 100 toward the second surface 104 side via the light transmitting portion 144 . can be transmitted from the second surface 104 side of the substrate 100 to the first surface 102 side via the . Therefore, with human vision, an object on the second surface 104 side of the substrate 100 can be seen through from the first surface 102 side of the substrate 100, and an object on the first surface 102 side of the substrate 100 can be seen from the second surface 104 side of the substrate 100. can be seen through.

Next, details of the cross-sectional structure of the light emitting system 20 will be described with reference to FIG. The light emitting system 20 includes a light emitting device 10, a substrate 200 and an adhesive layer 300. FIG.

Substrate 200 has a first side 202 and a second side 204 . The first surface 202 faces the inside of the vehicle body. The second side 204 is opposite the first side 202 and faces the outside of the vehicle body.

The base material 200 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. The substrate 200 is made of colored glass and contains a colorant that presents black or a color similar to black. Therefore, the base material 200 is smoked from the first surface 202 to the second surface 204 along the thickness direction of the base material 200 .

The light emitting device 10 is positioned inside the vehicle body. Specifically, the light emitting device 10 is attached to the substrate 200 so that the second surface 104 of the substrate 100 faces the first surface 202 of the substrate 200 with the adhesive layer 300 interposed therebetween. That is, the light emitted from the light emitting surface of the light emitting device 10 (the second surface 104 of the substrate 100) passes through the adhesive layer 300 and the base material 200 and is emitted to the outside of the light emitting system 20.

The light emitting device 10 has a sealing portion 150 . The sealing part 150 seals the first surface 102 of the substrate 100 and the plurality of light emitting parts 142 . Various structures can be employed for the sealing portion 150 . In the first example, the sealing section 150 may have a member that covers the first surface 102 of the substrate 100 and the light emitting section 142 with the hollow region interposed therebetween. In this example, the hollow region will seal each light-emitting portion 142 from outside regions. In the second example, the sealing portion 150 has an adhesive layer covering the first surface 102 of the substrate 100 and the light emitting portion 142, and a sealing plate bonded to the first surface 102 of the substrate 100 via the adhesive layer. You may have In this example, each light-emitting portion 142 is sealed from the external region by the adhesive layer and the sealing plate. In the third example, the sealing part 150 may have an inorganic layer covering the first surface 102 of the substrate 100 and the plurality of light emitting parts 142 . The inorganic layer is formed, for example, by ALD (Atomic Layer Deposition). In this example, the inorganic layer seals each light-emitting portion 142 from outside regions. In addition, the structure of the sealing part 150 is not limited to these examples.

The adhesive layer 300 has translucency. Therefore, the adhesive layer 300 hardly absorbs light emitted from the light emitting device 10 . Specifically, the adhesive layer 300 is an OCA (Optically Clear Adhesive), and more specifically contains at least one of an acrylic adhesive, a urethane adhesive, and a silicone adhesive.

In one example, the adhesive layer 300 can be a cured product of a photocurable material, more specifically, a cured product of UV (UltraViolet) curable LOCA (Liquid Optically Clear Adhesive). In this example, the adhesive layer 300 can be formed by applying LOCA between the light emitting device 10 (substrate 100) and the base material 200 and irradiating the applied LOCA with ultraviolet rays. Therefore, the adhesive layer 300 can be filled with almost no gap between the light emitting device 10 (substrate 100) and the base material 200, and the light emitting device 10 (substrate 100) can be attached to the base material 200 with high reliability. can be done.

In another example, adhesive layer 300 may be an OCA tape. In this example, the light-emitting device 10 (substrate 100) can be attached to the base material 200 by the adhesive layer 300 (OCA tape) without irradiating light (eg, ultraviolet rays).

Furthermore, the adhesive layer 300 may have thermoplasticity. In this case, the light-emitting device 10 (substrate 100 ) can be removed from the base material 200 by heating the adhesive layer 300 . That is, the adhesive layer 300 has high reworkability.

From the viewpoint of suppressing Fresnel reflection between the substrate 100 and the adhesive layer 300 for light emitted from the light emitting device 10, the refractive index of the adhesive layer 300 is preferably close to the refractive index of the substrate 100. For example, , the refractive index of the substrate 100 can be 75% or more and 125% or less. Especially when the adhesive layer 300 is the OCA described above, the refractive index of the adhesive layer 300 approximates the refractive index of the substrate 100 .

From the viewpoint of suppressing Fresnel reflection between the adhesive layer 300 and the base material 200 for light emitted from the light emitting device 10, the refractive index of the adhesive layer 300 is preferably close to the refractive index of the base material 200. , in one example, it can be 75% or more and 125% or less of the refractive index of the substrate 200 . Especially when the adhesive layer 300 is the OCA described above, the refractive index of the adhesive layer 300 approximates the refractive index of the substrate 200 .

From the viewpoint of stably attaching the light emitting device 10 to the first surface 202 of the substrate 200 even if the first surface 202 of the base material 200 is curved, the adhesive layer 300 is preferably thick to some extent. , 500 μm or more.

FIG. 6 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. In the example shown in FIG. 6, the light emitted from the light emitting section 142 of the light emitting device 10 passes through the substrate 100, the adhesive layer 300 and the base material 200 and reaches the second surface 204 of the base material 200. A portion is emitted from the second surface 204 of the substrate 200 and a portion of this light is reflected at the second surface 204 of the substrate 200 by Fresnel reflection.

The base material 200 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, although some of the light emitted from the light emitting device 10 is absorbed by the substrate 200 , the light not absorbed by the substrate 200 can reach the second surface 204 of the substrate 200 .

The refractive index of the adhesive layer 300 approximates both the refractive index of the substrate 100 and the refractive index of the base material 200 . Therefore, Fresnel reflection at the interface between the substrate 100 and the adhesive layer 300 and Fresnel reflection at the interface between the adhesive layer 300 and the base material 200 hardly occur.

Light reflected by the second surface 204 of the substrate 200 is absorbed by the substrate 200, in particular by the first portion 200a of the substrate 200. FIG. Therefore, the light reflected by the second surface 204 of the base material 200 passes through the adhesive layer 300 and the light emitting device 10 (especially, the translucent portion 144 of the light emitting device 10) to the light emitting side of the base material 200 (the second surface 204). side) can be suppressed from leaking to the opposite side.

As described above, according to the present embodiment, the member (the first portion 200a of the substrate 200) for attenuating the light traveling toward the side opposite to the light emitting side (second surface 204 side) of the substrate 200 is replaced with this member. (second portion 200b of base material 200).

FIG. 7 is a diagram showing a modification of FIG. The light emitting system 20 according to this modification is the same as the light emitting system 20 according to Embodiment 1, except for the following points.

The base material 200 has a translucent base material 201 and a colored film 203 . The translucent base material 201 is on the outside of the vehicle body (in other words, on the side of the second surface 204 of the base material 200), and the colored film 203 is on the inside of the vehicle body (in other words, on the side of the first surface 202 of the base material 200). It is in.

The translucent base material 201 has translucency, and specifically has an average transmittance of more than 50% for visible light. In one example, the translucent substrate 201 can be glass that does not contain a colorant.

In one example, the color of the colored film 203 can be black or a color similar to black. In this example, substrate 200 can be smoked.

The colored film 203 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, the colored film 203 can function as an ND (Neutral Density) filter.

The substrate 200 as a whole has an average transmittance of 5% or more and 50% or less for visible light. Specifically, even if the translucent base material 201 has translucency as described above, the colored film 203 has light shielding properties as described above. Therefore, the transmittance of the base material 200 as a whole can be kept low.

Colored film 203 extends from first portion 200 a to second portion 200 b of substrate 200 . Therefore, the member (the first portion 200a of the colored film 203) for attenuating the light directed to the side opposite to the light emitting side (second surface 204 side) of the base material 200 is replaced with the region around the member (the colored film 203 to the second part 200b).

From the viewpoint of suppressing Fresnel reflection between the adhesive layer 300 and the colored film 203 for light emitted from the light emitting device 10, the refractive index of the colored film 203 is preferably close to the refractive index of the adhesive layer 300. , in one example, the refractive index of the adhesive layer 300 can be 75% or more and 125% or less.

From the viewpoint of suppressing Fresnel reflection between the colored film 203 and the translucent substrate 201 with respect to the light emitted from the light emitting device 10, the refractive index of the colored film 203 approximates the refractive index of the translucent substrate 201. In one example, it can be 75% or more and 125% or less of the refractive index of the translucent base material 201 .

FIG. 8 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 7, and corresponds to FIG. 6 of the first embodiment. In the example shown in FIG. 8, the light emitted from the light-emitting portion 142 of the light-emitting device 10 passes through the substrate 100, the adhesive layer 300, and the base material 200 and reaches the second surface 204 of the base material 200. A portion is emitted from the second surface 204 of the substrate 200 and a portion of this light is reflected at the second surface 204 of the substrate 200 by Fresnel reflection.

The colored film 203 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, although part of the light emitted from the light emitting device 10 is absorbed by the colored film 203 , the light not absorbed by the colored film 203 can enter the translucent base 201 .

Light reflected by the second surface 204 of the substrate 200 (translucent substrate 201 ) is absorbed by the colored film 203 of the substrate 200 . Therefore, the light reflected by the second surface 204 of the base material 200 passes through the adhesive layer 300 and the light emitting device 10 (especially, the translucent portion 144 of the light emitting device 10) to the light emitting side of the base material 200 (the second surface 204). side) can be suppressed from leaking to the opposite side.

Also in this modification, a member (first portion 200a of colored film 203) for attenuating light directed toward the side opposite to the light emitting side (second surface 204 side) of base material 200 is provided around this member. It can be made inconspicuous with respect to the area (the second portion 200b of the colored film 203).

(Embodiment 2)
FIG. 9 is a cross-sectional view showing a light emitting system 20 according to Embodiment 2, and corresponds to FIG. 5 of Embodiment 1. FIG. The light emitting system 20 according to this embodiment is the same as the light emitting system 20 according to the first embodiment except for the following points.

The light emitting device 10 is positioned outside the vehicle body. Specifically, the light emitting device 10 is attached to the substrate 200 so that the first surface 102 faces the second surface 204 of the substrate 200 with the adhesive layer 300 interposed therebetween. In other words, the light emitted from the light emitting surface of the light emitting device 10 (the second surface 104 of the substrate 100) is emitted to the outside of the light emitting system 20 without passing through the adhesive layer 300 and the base material 200.

FIG. 10 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 9, and corresponds to FIG. 6 of the first embodiment. In the example shown in FIG. 10 , the light emitted from the light-emitting portion 142 of the light-emitting device 10 passes through the substrate 100 and reaches the second surface 104 of the substrate 100 , and most of this light reaches the second surface 104 of the substrate 100 and part of this light is reflected by the second surface 104 of the substrate 100 by Fresnel reflection.

Light reflected by the second surface 104 of the substrate 100 is absorbed by the substrate 200 . Therefore, the light reflected by the second surface 104 of the substrate 100 passes through the light-emitting device 10 (especially, the light-transmitting portion 144 of the light-emitting device 10) and the adhesive layer 300 to the light emitting side of the substrate 200 (the second surface 204 side). ) can be suppressed from leaking to the opposite side.

Also in the present embodiment, a member (the first portion 200a of the base material 200) for attenuating light traveling toward the opposite side of the light emitting side (second surface 204 side) of the base material 200 is provided around the member. It can be made inconspicuous with respect to the region (the second portion 200b of the base material 200).

FIG. 11 is a diagram showing a modification of FIG. 9, and corresponds to FIG. 7 of the first embodiment. The light emitting system 20 according to this modification is the same as the light emitting system 20 according to Embodiment 2, except for the following points.

As in the example shown in FIG. 7, the substrate 200 as a whole has an average transmittance of 5% or more and 50% or less for visible light. Specifically, even if the translucent base material 201 has translucency as described above, the colored film 203 has light shielding properties as described above. Therefore, the transmittance of the base material 200 as a whole can be kept low.

Similar to the example shown in FIG. 7, the colored film 203 extends from the first portion 200a of the substrate 200 to the second portion 200b. Therefore, the member (the first portion 200a of the colored film 203) for attenuating the light directed to the side opposite to the light emitting side (second surface 204 side) of the base material 200 is replaced with the region around the member (the colored film 203 to the second part 200b).

FIG. 12 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 11, and corresponds to FIG. 8 of the first embodiment. In the example shown in FIG. 12 , the light emitted from the light-emitting portion 142 of the light-emitting device 10 passes through the substrate 100 and reaches the second surface 104 of the substrate 100, and most of this light reaches the second surface 104 of the substrate 100. and part of this light is reflected by the second surface 104 of the substrate 100 by Fresnel reflection.

Light reflected by the second surface 104 of the substrate 100 is absorbed by the colored film 203 . Therefore, the light reflected by the second surface 104 of the substrate 100 passes through the light-emitting device 10 (especially, the light-transmitting portion 144 of the light-emitting device 10) and the adhesive layer 300 to the light emitting side of the substrate 200 (the second surface 204 side). ) can be suppressed from leaking to the opposite side.

Also in this modification, a member (first portion 200a of colored film 203) for attenuating light directed toward the side opposite to the light emitting side (second surface 204 side) of base material 200 is provided around this member. It can be made inconspicuous with respect to the area (the second portion 200b of the colored film 203).

(Embodiment 3)
13 is a plan view showing a light emitting system 20 according to Embodiment 3, and corresponds to FIG. 1 of Embodiment 1. FIG. FIG. 14 is a diagram of FIG. 13 with the colored film 400 removed. FIG. 15 is a diagram with the light emitting device 10 removed from FIG. 14, and corresponds to FIG. 2 of the first embodiment. FIG. 16 is a cross-sectional view taken along line MM of FIG. 13 and corresponds to FIG. 5 of the first embodiment. The light emitting system 20 according to this embodiment is the same as the light emitting system 20 according to the first embodiment except for the following points.

The light emitting device 10 has a colored film 400 . As shown in FIG. 13 , the colored film 400 overlaps the first portion 200 a of the base material 200 and does not overlap the second portion 200 b of the base material 200 . As shown in FIG. 16, the colored film 400 is positioned inside the vehicle body. More specifically, the colored film 400 is located on the opposite side of the substrate 200 with the light emitting device 10 interposed therebetween.

The colored film 400 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, the colored film 400 can function as an ND (Neutral Density) filter.

As shown in FIGS. 15 and 16, the first portion 200a of the substrate 200 is translucent, and specifically has an average transmittance of more than 50% for visible light. On the other hand, the second portion 200b of the base material 200 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. In one example, the substrate 200 can be glass that includes no colorant in the first portion 200a and colorant in the second portion 200b.

According to the above-described configuration, the member for attenuating the light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is made inconspicuous with respect to the area around the member. be able to. Specifically, in the above-described configuration, the colored film 400 has a light-shielding property, and is used to attenuate light directed toward the side opposite to the light-emitting side (second surface 204 side) of the base material 200. functioning as components. Furthermore, the area around the colored film 400 (that is, the first portion 200a of the base material 200), that is, the second portion 200b of the base material 200 has a light-shielding property. Therefore, the color of the light emitting system 20 is substantially uniform from the colored film 400 (the first portion 200a of the substrate 200) to the second portion 200b. Thus, according to the above-described configuration, the member (coloring film 400) for attenuating the light traveling toward the side opposite to the light emitting side (second surface 204 side) of base material 200 is provided around this member. (second portion 200b of base material 200).

Furthermore, according to the configuration described above, the light emitted from the light emitting device 10 can be emitted from the light emitting side (second surface 204 side) of the base material 200 with low loss. Specifically, in the above-described configuration, the colored film 400, that is, the member for attenuating the light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is the light emitting device 10. It is not located between the light emitting surface (second surface 104 of substrate 100) and the light emitting side (second surface 204 side) of substrate 200. Furthermore, the region between the light emitting surface of the light emitting device 10 (the second surface 104 of the substrate 100) and the light emitting side (the second surface 204 side) of the substrate 200 is the first portion 200a of the substrate 200 and the adhesive layer 300. , and absorbs almost no light. Therefore, most of the light emitted from the light emitting device 10 is absorbed in the region between the light emitting surface of the light emitting device 10 (the second surface 104 of the substrate 100) and the light emitting side of the substrate 200 (the second surface 204 side). The second surface 204 of the substrate 200 can be reached without the need to Thus, according to the configuration described above, the light emitted from the light emitting device 10 can be emitted from the light emitting side (second surface 204 side) of the base material 200 with low loss.

FIG. 17 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 16, and corresponds to FIG. 6 of the first embodiment. In the example shown in FIG. 17, the light emitted from the light emitting section 142 of the light emitting device 10 passes through the substrate 100, the adhesive layer 300 and the base material 200 and reaches the second surface 204 of the base material 200. A portion is emitted from the second surface 204 of the substrate 200 and a portion of this light is reflected at the second surface 204 of the substrate 200 by Fresnel reflection.

Light reflected by the second surface 204 of the substrate 200 is absorbed by the colored film 400 . Therefore, the light reflected by the second surface 204 of the base material 200 passes through the adhesive layer 300 and the light emitting device 10 (especially, the translucent portion 144 of the light emitting device 10) to the light emitting side of the base material 200 (the second surface 204). side) can be suppressed from leaking to the opposite side.

Also in the present embodiment, a member (colored film 400) for attenuating light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is provided in the area around this member (the base material 200 can be made inconspicuous relative to the second portion 200b) of the .

Furthermore, in the present embodiment, the light emitted from the light emitting device 10 can be emitted from the light emitting side (second surface 204 side) of the substrate 200 with low loss.

18 is a diagram showing a modification of FIG. 16. FIG. The light emitting system 20 according to this modified example is the same as the light emitting system 20 according to Embodiment 3, except for the following points.

In the example shown in FIG. 18, the colored film 400 extends from the first portion 200a of the substrate 200 to the second portion 200b. The colored film 400 covers the light-emitting device 10 in a region overlapping the first portion 200a of the substrate 200, and covers the first surface 202 of the substrate 200 in a region overlapping the second portion 200b of the substrate 200. there is

As in the example shown in FIG. 16, the colored film 400 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, the colored film 400 can function as an ND (Neutral Density) filter.

The substrate 200 has translucency from the first portion 200a to the second portion 200b. It has an average transmittance. In one example, the substrate 200 can be a colorant-free glass.

According to the above-described configuration, the member for attenuating the light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is made inconspicuous with respect to the area around the member. be able to. Specifically, in the above-described configuration, the colored film 400 has a light-shielding property, and is used to attenuate light directed toward the side opposite to the light-emitting side (second surface 204 side) of the base material 200. functioning as components. Further, the colored film 400 extends from the first portion 200a to the second portion 200b of the substrate 200. As shown in FIG. Accordingly, the color of the light emitting system 20 is substantially uniform from the area overlapping the first portion 200a of the substrate 200 to the area overlapping the second portion 200b of the substrate 200. FIG. In this way, according to the above-described configuration, the member for attenuating the light directed to the side opposite to the light emitting side (second surface 204 side) of the base material 200 (overlapping the first portion 200a of the base material 200) The colored film 400 on the area) can be made inconspicuous with respect to the surrounding area of the member (the colored film 400 on the area overlapping the second portion 200b of the substrate 200).

Furthermore, according to the configuration described above, the light emitted from the light emitting device 10 can be emitted from the light emitting side (second surface 204 side) of the substrate 200 with low loss. Specifically, in the above-described configuration, the colored film 400, that is, the member for attenuating the light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is the light emitting device 10. It is not located between the light emitting surface (second surface 104 of substrate 100) and the light emitting side (second surface 204 side) of substrate 200. Furthermore, the region between the light emitting surface of the light emitting device 10 (the second surface 104 of the substrate 100) and the light emitting side (the second surface 204 side) of the substrate 200 is the first portion 200a of the substrate 200 and the adhesive layer 300. , and absorbs almost no light. Therefore, most of the light emitted from the light emitting device 10 is absorbed in the region between the light emitting surface of the light emitting device 10 (the second surface 104 of the substrate 100) and the light emitting side of the substrate 200 (the second surface 204 side). The second surface 204 of the substrate 200 can be reached without the need to Thus, according to the configuration described above, the light emitted from the light emitting device 10 can be emitted from the light emitting side (second surface 204 side) of the base material 200 with low loss.

FIG. 19 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 18, and corresponds to FIG. 17 of the third embodiment. In the example shown in FIG. 19, the light emitted from the light emitting portion 142 of the light emitting device 10 passes through the substrate 100, the adhesive layer 300 and the base material 200 and reaches the second surface 204 of the base material 200. A portion is emitted from the second surface 204 of the substrate 200 and a portion of this light is reflected at the second surface 204 of the substrate 200 by Fresnel reflection.

Light reflected by the second surface 204 of the substrate 200 is absorbed by the colored film 400 . Therefore, the light reflected by the second surface 204 of the base material 200 passes through the adhesive layer 300 and the light emitting device 10 (especially, the translucent portion 144 of the light emitting device 10) to the light emitting side of the base material 200 (the second surface 204). side) can be suppressed from leaking to the opposite side.

Also in this modification, a member for attenuating light traveling toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 (the colored film 400 on the region overlapping the first portion 200a of the base material 200 ) can be made inconspicuous relative to the area around this member (the colored film 400 on the area overlapping the second portion 200b of the substrate 200).

Furthermore, also in this modified example, the light emitted from the light emitting device 10 can be emitted from the light emitting side (second surface 204 side) of the base material 200 with low loss.

(Embodiment 4)
FIG. 20 is a cross-sectional view showing a light emitting system 20 according to Embodiment 4, and corresponds to FIG. 6 of Embodiment 1. FIG. FIG. 21 is a cross-sectional view showing details of the light emitting device 10 shown in FIG. 20, and corresponds to FIG. 4 of the first embodiment. The light emitting system 20 according to this embodiment is the same as the light emitting system 20 according to Embodiment 4, except for the following points.

Details of the light emitting device 10 will be described with reference to FIG. In the example shown in FIG. 21, the light emitting device 10 functions as top emission. Specifically, the first electrode 110 has a light-shielding property, more specifically, a light-reflecting property, and the second electrode 130 has a light-transmitting property. Therefore, light emitted from the organic layer 120 passes through the second electrode 130 and is emitted from the first surface 102 side of the substrate 100 . In other words, the first surface 102 of the substrate 100 functions as the light emitting surface of the light emitting device 10 .

An example of the operation of the light emitting system 20 will be described with reference to FIG. 20 . In the example shown in FIG. 20, the light emitting device 10 is positioned inside the vehicle body. Specifically, the light emitting device 10 is attached to the substrate 200 so that the first surface 102 of the substrate 100 faces the first surface 202 of the substrate 200 with the adhesive layer 300 interposed therebetween. That is, the light emitted from the light emitting surface of the light emitting device 10 (the first surface 102 of the substrate 100) passes through the adhesive layer 300 and the base material 200 and is emitted to the outside of the light emitting system 20.

FIG. 22 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 20, and corresponds to FIG. 6 of the first embodiment. In the example shown in FIG. 22, the light emitted from the light emitting portion 142 of the light emitting device 10 passes through the adhesive layer 300 and the base material 200 and reaches the second surface 204 of the base material 200, and most of this light is the base material. A portion of this light is emitted from the second surface 204 of the material 200 and is reflected at the second surface 204 of the substrate 200 by Fresnel reflection.

The base material 200 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, although some of the light emitted from the light emitting device 10 is absorbed by the substrate 200 , the light not absorbed by the substrate 200 can reach the second surface 204 of the substrate 200 .

Light reflected by the second surface 204 of the substrate 200 is absorbed by the substrate 200 . Therefore, the light reflected by the second surface 204 of the base material 200 passes through the adhesive layer 300 and the light emitting device 10 (especially, the translucent portion 144 of the light emitting device 10) to the light emitting side of the base material 200 (the second surface 204). side) can be suppressed from leaking to the opposite side.

Also in the present embodiment, a member (the first portion 200a of the base material 200) for attenuating light traveling toward the opposite side of the light emitting side (second surface 204 side) of the base material 200 is provided around the member. It can be made inconspicuous with respect to the region (the second portion 200b of the base material 200).

(Embodiment 5)
23 is a cross-sectional view showing a light emitting system 20 according to Embodiment 5, and corresponds to FIG. 20 of Embodiment 4. FIG. The light emitting system 20 according to this embodiment is the same as the light emitting system 20 according to Embodiment 4, except for the following points.

In the example shown in FIG. 23, the light emitting device 10 functions as a top emission in the same manner as in the example shown in FIG.

The light emitting device 10 includes a colored film 400 in the same manner as the example shown in FIG. Colored film 400 overlaps first portion 200 a of substrate 200 and does not overlap second portion 200 b of substrate 200 . The colored film 400 is positioned inside the vehicle body. More specifically, the colored film 400 is located on the opposite side of the substrate 200 with the light emitting device 10 interposed therebetween.

The colored film 400 has a light shielding property, and specifically has an average transmittance of 5% or more and 50% or less for visible light. Therefore, the colored film 400 can function as an ND (Neutral Density) filter.

FIG. 24 is a diagram for explaining an example of the operation of the light emitting system 20 shown in FIG. 23, and corresponds to FIG. 22 of the fourth embodiment. In the example shown in FIG. 24, the light emitted from the light emitting portion 142 of the light emitting device 10 passes through the adhesive layer 300 and the base material 200 and reaches the second surface 204 of the base material 200, and most of this light is the base material. A portion of this light is emitted from the second surface 204 of the material 200 and is reflected at the second surface 204 of the substrate 200 by Fresnel reflection.

Light reflected by the second surface 204 of the substrate 200 is absorbed by the colored film 400 . Therefore, the light reflected by the second surface 204 of the base material 200 passes through the adhesive layer 300 and the light emitting device 10 (especially, the translucent portion 144 of the light emitting device 10) to the light emitting side of the base material 200 (the second surface 204). side) can be suppressed from leaking to the opposite side.

Also in the present embodiment, a member (colored film 400) for attenuating light directed toward the side opposite to the light emitting side (second surface 204 side) of the base material 200 is provided in the area around this member (the base material 200 can be made inconspicuous relative to the second portion 200b) of the .

Although the embodiments and examples have been described above with reference to the drawings, these are examples of the present invention, and various configurations other than those described above can be adopted.

10 Light-emitting device 20 Light-emitting system 100 Substrate 102 First surface 104 Second surface 110 First electrode 120 Organic layer 130 Second electrode 140 Light-emitting region 142 Light-emitting portion 144 Translucent portion 150 Sealing portion 200 Base material 200a First portion 200b 2 parts 201 translucent substrate 202 first surface 203 colored film 204 second surface 300 adhesive layer 400 colored film

Claims (1)

a substrate including a first portion and a second portion;
a light-emitting device including a plurality of light-emitting portions and a plurality of light-transmitting portions that overlap the first portion of the base material and do not overlap the second portion of the base material and are arranged alternately;
an adhesive layer positioned between the light emitting device and the substrate;
with
the second portion of the substrate has an average transmittance of 5% or more and 50% or less for visible light;
A light-emitting system in which the light-emitting device overlaps with a region having an average transmittance of 5% or more and 50% or less for visible light.

Images