JP7145303B2 - light emitting device - Google Patents

Description

The present invention relates to light emitting devices.

In recent years, organic light emitting diodes (OLEDs) have been developed as light emitting devices. An OLED has a first electrode, an organic layer, and a second electrode, and the organic layer can emit light by organic electroluminescence (EL) according to a voltage between the first electrode and the second electrode.

Patent Literatures 1 and 2 describe the use of OLEDs as automobile marker lights by attaching OLEDs to the rear glass of automobiles. In particular, Patent Literature 1 describes that OLEDs have translucency. Specifically, in Patent Document 1, a plurality of second electrodes each having light reflectivity are arranged in stripes. Therefore, light from the outside of the OLED can pass between the adjacent second electrodes. Thus, the OLED has translucency.

Patent Document 3 describes an OLED having a plurality of pixels. Each pixel has a red light emitting portion, a green light emitting portion and a blue light emitting portion. The area of each light emitting portion decreases in the order of the red light emitting portion, the green light emitting portion, and the blue light emitting portion. In particular, the area of each light emitting portion is such that when the red light emitting portion, the green light emitting portion and the blue light emitting portion are electrically connected in parallel, the luminance of each of the red light emitting portion, the green light emitting portion and the blue light emitting portion is substantially constant. It is determined that

Patent Literature 4 describes an OLED with auxiliary wiring. The auxiliary wiring extends over the first electrode and is covered with an insulating layer. The insulating layer is covered by the organic layer and provided to prevent short-circuiting between the first electrode and the second electrode. The width of the insulating layer varies depending on the position within the light emitting region.

Patent Document 5 describes a touch panel. A touch panel has a display (eg, a liquid crystal display (LCD) or an OLED display) and a plurality of transparent electrodes. The plurality of transparent electrodes are positioned on the light emitting surface side of the display and arranged in stripes. Japanese Patent Laid-Open No. 2002-200302 describes that moiré occurs due to a pixel pattern of a display and a pattern of a plurality of transparent electrodes.

JP 2015-195173 A JP 2015-76294 A JP-A-2003-77663 Japanese Unexamined Patent Application Publication No. 2016-46001 JP 2014-63248 A

The inventors have considered the use of light-emitting regions comprising alternating light-emitting and light-transmitting portions in a variety of lighting systems, particularly high-mounted stop lamps (HMSL) in automobiles. In particular, the present inventors considered placing a light-transmitting member on the light-emitting surface side of the light-emitting region away from the light-emitting region and protecting the light-emitting region with the light-transmitting member. However, when the light-emitting region is viewed from the opposite side of the light-transmitting member, moire may occur due to the pattern of the plurality of light-emitting portions in the light-emitting region and the light pattern reflected on the light-transmitting member by the light from the plurality of light-emitting portions. The inventor of the present invention has found.

One example of the problem to be solved by the present invention is to make moiré that can be caused by the pattern of the plurality of light emitting portions in the light emitting region and the pattern of light reflected on the translucent member by the light from the plurality of light emitting portions inconspicuous. It is mentioned as.

The invention according to claim 1,
a plurality of light-emitting portions including a first light-emitting portion and a second light-emitting portion adjacent to each other and emitting light in a first color; a light-emitting region including a second light-transmitting portion located on the opposite side of the first light-transmitting portion of two light-emitting portions and a plurality of light-transmitting portions located between the adjacent light-transmitting portions;
a light-transmitting member positioned on the light-emitting surface side of the light-emitting region and spaced apart from the light-emitting region;
with
The first light emitting part and the second light emitting part have different widths, or the first light transmitting part and the second light transmitting part have different widths.

1 is a diagram for explaining a light emitting device according to Embodiment 1; FIG. FIG. 4 is a diagram for explaining the reason why moire occurs; 2 is a diagram for explaining an example of the details of the light emitting member shown in FIG. 1; FIG. 4 is a plan view of the light emitting device shown in FIG. 3 as viewed from the first surface side of the substrate; FIG. FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; 4 is a diagram for explaining a light emitting region according to the first example of Embodiment 1; FIG. The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 7 is a diagram showing a spectrum (lower part of FIG. 7) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 6); 8 is a diagram for explaining a light emitting region according to a second example of Embodiment 1; FIG. The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 9 is a diagram showing a spectrum (lower part of FIG. 9) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 8); FIG. 10 is a diagram for explaining a light-emitting region according to a third example of Embodiment 1; The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 11 is a diagram showing a spectrum (lower part of FIG. 11) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 10); FIG. 10 is a diagram for explaining a light emitting region according to a fourth example of Embodiment 1; The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 13 is a diagram showing a spectrum (lower part of FIG. 13) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 12); FIG. 11 is a diagram for explaining a light-emitting region according to the fifth example of Embodiment 1; The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 15 is a diagram showing a spectrum (lower stage in FIG. 15) obtained by Fourier transforming a pattern (second stage in Embodiment 1 of FIG. 14); FIG. 11 is a diagram for explaining a light emitting region according to the sixth example of the first embodiment; The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 17 is a diagram showing a spectrum (lower part of FIG. 17) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 16); FIG. 13 is a diagram for explaining a first example of details of the light emitting region 140 shown in FIG. 10 or FIG. 12; 13 is a diagram for explaining a second example of details of the light emitting region 140 shown in FIG. 10 or FIG. 12; FIG. FIG. 10 is a diagram for explaining a light-emitting device according to a first example of Embodiment 2; 21 is a diagram for explaining an example of moiré by the light emitting device shown in FIG. 20; FIG. The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 21 (the upper part of FIG. 22) and the spectrum obtained by Fourier transforming the pattern at position P in Embodiment 2 in FIG. FIG. 22, lower stage). FIG. 10 is a diagram for explaining the reason why moire becomes inconspicuous in the second embodiment; FIG. 10 is a diagram for explaining a light-emitting device according to a second example of Embodiment 2; FIG. 25 is a diagram for explaining an example of moire produced by the light emitting device shown in FIG. 24; The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 25 (the upper part of FIG. 26) and the spectrum obtained by Fourier transforming the pattern at position P in Embodiment 2 in FIG. 25 ( 26). FIG. 11 is a diagram for explaining a light-emitting device according to a third example of Embodiment 2; 28 is a diagram for explaining an example of moire produced by the light emitting device shown in FIG. 27; FIG. The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 28 (the upper part of FIG. 29) and the spectrum obtained by Fourier transforming the pattern at position P in Embodiment 2 in FIG. 28 ( 29). FIG. 11 is a diagram for explaining a light-emitting device according to a fourth example of Embodiment 2; 31 is a diagram for explaining an example of moire produced by the light emitting device shown in FIG. 30; FIG. The spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 31 (the upper part of FIG. 32) and the spectrum obtained by Fourier transforming the pattern at position P in Embodiment 2 in FIG. FIG. 32) is a diagram showing the lower part of FIG. FIG. 10 is a diagram for explaining a light-emitting device according to a fifth example of embodiment 2; FIG. 11 is a diagram for explaining a light emitting device according to a sixth example of Embodiment 2; FIG. 11 is a diagram for explaining a light emitting device according to a seventh example of embodiment 2; FIG. 11 is a diagram for explaining a light-emitting device according to an eighth example of embodiment 2;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described 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.

(Embodiment 1)
FIG. 1 is a diagram for explaining a light emitting device 30 according to Embodiment 1. FIG.

A light-emitting device 30 includes a light-emitting member 10 and a light-transmitting member 20 .

The light emitting member 10 has a light emitting region 140 . 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 are arranged alternately, and in particular, each of the plurality of light-transmitting portions 144 is positioned between adjacent light-emitting portions 142 . The plurality of light emitting units 142 emit light in the first color. That is, the light emitting region 140 emits a single light (light of the first color). The first color is red, for example. Light emitted from the plurality of light emitting portions 142 is emitted toward the light transmitting member 20 side.

The translucent member 20 is positioned on the light emitting surface side of the light emitting region 140 and spaced from the light emitting region 140 . The translucent member 20 has surfaces 22 and 24 . The translucent member 20 is positioned so that the surface 22 faces the light emitting region 140 . A pattern of a plurality of light-emitting portions 142 in the light-emitting region 140 is reflected on the surface 22 of the translucent member 20 . Surface 24 is located opposite surface 22 .

The translucent member 20 can function as a cover that protects the light emitting member 10 (light emitting region 140). The translucent member 20 can be made of a highly corrosion-resistant transparent resin such as acrylic resin or polycarbonate.

In the example shown in FIG. 1, the pattern of the plurality of light-emitting portions 142 in the light-emitting region 140 is positioned within an angle θp from the position P, and the pattern of light reflected on the translucent member 20 is positioned at an angle θp from the position P. It is located within the range of θc. The position P is located on the opposite side of the translucent member 20 with the light emitting region 140 interposed therebetween. The translucent member 20 is farther from the position P than the light emitting region 140, so the angle θc is smaller than the angle θp.

The light emitting device 30 shown in FIG. 1 can be used for a high mount stop lamp (HMSL) of an automobile. Specifically, the light emitting member 10 is an HMSL, which can be attached to the rear glass of an automobile, and emits light to the outside of the automobile, particularly toward the rear of the automobile. Position P can be a position between the driver's seat and the passenger's seat.

FIG. 2 is a diagram for explaining the reason why moire occurs.

At position P (the pattern on the third stage in FIG. 2), the pattern of the plurality of light emitting portions 142 in the light emitting region 140 (the pattern on the second stage in FIG. 2) and the pattern of light reflected on the translucent member 20 (the pattern on the second stage in FIG. 2), moire occurs, and bright portions (B) and dark portions (D) are arranged alternately.

The moire at the position P is generated because the width of the pattern of the plurality of light emitting portions 142 in the light emitting region 140 and the width of the pattern of light reflected on the translucent member 20 are different at the position P. FIG. Specifically, as described above, the pattern of the plurality of light emitting portions 142 in the light emitting region 140 is positioned within the range of the angle θp from the position P, and the pattern of light reflected on the translucent member 20 is positioned at the angle θp from the position P. It is located within the range of θc. The angle θc is smaller than the angle θp. Therefore, at the position P, the pattern of the plurality of light-emitting portions 142 in the light-emitting region 140 and the pattern of the light reflected on the translucent member 20 deviate from each other.

FIG. 3 is a diagram for explaining an example of details of the light emitting member 10 shown in FIG.

In the example shown in FIG. 3, the light-emitting member 10 is of bottom emission type, and the light from the light-emitting portion 142 is emitted through the substrate 100 (details will be described later). In another example, the light emitting member 10 may not be bottom emitting, and may be top emitting.

The light emitting member 10 has a substrate 100 . Substrate 100 has a first side 102 and a second side 104 . The plurality of light emitting units 142 are positioned on the first surface 102 side of the substrate 100 . The second surface 104 is located opposite the first surface 102 . The substrate 100 is positioned so that the second surface 104 faces the translucent member 20 .

A second surface 104 of the substrate 100 functions as a light emitting surface of the light emitting region 140 . Specifically, the light from the plurality of light emitting units 142 is transmitted through the substrate 100 and emitted from the second surface 104 of the substrate 100 toward the translucent member 20 .

4 is a plan view of the light emitting device 30 shown in FIG. 3 as viewed from the first surface 102 side of the substrate 100. FIG. FIG. 5 is a cross-sectional view taken along line AA of FIG.

Details of the planar layout of the light emitting member 10 will be described with reference to FIG.

The light-emitting member 10 includes a substrate 100 and a light-emitting region 140 . The light-emitting region 140 has a plurality of light-emitting portions 142 and a plurality of light-transmitting portions 144 .

In the example shown in FIG. 4, the substrate 100 has a rectangular shape with a pair of long sides and a pair of short sides. Note that the shape of the substrate 100 is not limited to the example shown in FIG.

The light emitting region 140 spreads out in a plane, and in the example shown in FIG. 4, the shape of the light emitting region 140 is a rectangle having a pair of long sides and a pair of short sides. Particularly in the example shown in FIG. 4 , the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 extend in the extending direction of the short side of the substrate 100 and are arranged in the extending direction of the long side of the substrate 100 . In this manner, the plurality of light emitting portions 142 are arranged in stripes. Note that the shape of the light emitting region 140 is not limited to the example shown in FIG.

Details of the cross-sectional structure of the light emitting member 10 will be described with reference to FIG.

The light emitting member 10 has a substrate 100 , a first electrode 110 , an organic layer 120 and a second electrode 130 .

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

The substrate 100 is made of a translucent insulating material. In one example, substrate 100 is made of glass or resin (eg, PEN (polyethylene naphthalate), PES (polyethersulfone), PET (polyethylene terephthalate), or polyimide).

Substrate 100 may or may not be flexible. When the substrate 100 is made of resin, the substrate 100 can be made flexible.

The first electrode 110 is made of a conductive and translucent material. In one example, the first electrode 110 includes a metal oxide, more specifically, ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IWZO (Indium Tungsten Zinc Oxide), or ZnO (Zinc Oxide). . In another example, the first electrode 110 may comprise a conductive organic material, more specifically carbon nanotubes or PEDOT/PSS.

The organic layer 120 contains a material that emits light by organic EL. In one example, the organic layer 120 includes, from the first electrode 110 side toward the second electrode 130 side, a hole injection layer (HIL), a hole transport layer (HTL), a light emitting layer (EML), an electron transport layer (ETL). ) and an electron injection layer (EIL). Holes are injected into the EML from the first electrode 110 via HIL and HTL, and electrons are injected into the EML from the second electrode 130 via EIL and ETL. Holes and electrons recombine in the EML, thereby emitting light.

The second electrode 130 is made of a material having conductivity and light shielding properties, and particularly has light reflectivity. In one example, it comprises a metal, more specifically a metal selected from the group consisting of Al, Au, Ag, Pt, Mg, Sn, Zn and In, or an alloy of metals selected from this group. .

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 . As indicated by black arrows in FIG. 5, in the light-emitting portion 142, light emitted from the organic layer 120 passes through the first electrode 110, passes through the substrate 100, and is emitted from the second surface 104 of the substrate 100. . Even if the light emitted from the organic layer 120 goes toward the second electrode 130 , this light is reflected toward the first electrode 110 by the second electrode 130 .

In the example shown in FIG. 5, the width of the second electrode 130 is wider than the width of the light emitting section 142 . In particular, the end of the second electrode 130 is located outside the end of the light emitting portion 142 by a distance Δ.

The light-shielding member, particularly the second electrode 130 in the example shown in FIG. Therefore, as indicated by the white arrow in FIG. 5, light from the outside can pass through the translucent portion 144 .

FIG. 6 is a diagram for explaining the light emitting region 140 according to the first example of the first embodiment.

The plurality of light emitting units 142 emit light in the first color. That is, the light emitting region 140 emits a single light (light of the first color). The first color is red, for example. If light emitting region 140 is used as an HMSL, the first color can be red.

In the pattern of the light emitting region 140 in Embodiment 1 of FIG. 6 (the first stage of Embodiment 1 of FIG. 6), the width of the plurality of translucent portions 144 differs depending on the position within the light emitting region 140 . In particular, in the example shown in FIG. 6, light transmitting portions 144 (first light transmitting portions) having a first width and light transmitting portions 144 (second light transmitting portions) having a second width wider than the first width are alternately arranged. Lined up. In this manner, the widths of the plurality of light-transmitting portions 144 change periodically in the arrangement direction of the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 .

In the pattern of the light-emitting regions 140 in Embodiment 1 of FIG. 6 (the first row of Embodiment 1 of FIG. 6), the widths of the plurality of light-emitting portions 142 are substantially the same. The width of the portion 142 is in the range of 95% or more and 105% or less of the average width of the plurality of light emitting portions 142 . By making the widths of the plurality of light emitting portions 142 substantially the same, it is possible to obscure variations in brightness within the light emitting region 140 .

In the pattern of the plurality of light-emitting portions 142 in the light-emitting region 140 in Comparative Example 1 of FIG. , and the widths of the plurality of light-emitting portions 142 are the same at any position within the light-emitting region 140 .

6, the relative magnitude of the angle θc with respect to the angle θp (for example, FIG. 1) is the same in the first embodiment and the first comparative example. That is, in Embodiment 1 and Comparative Example 1, the width of the light emitting member 10 (light emitting region 140), the distance between the light emitting member 10 and the translucent member 20, and the distance between the position P and the light emitting member 10 are common. ing.

FIG. 7 shows the spectrum (upper part of FIG. 7) obtained by Fourier transforming the pattern at position P of Comparative Example 1 in FIG. FIG. 8 is a diagram showing a spectrum (lower part of FIG. 7) obtained by Fourier transforming the pattern at the position P of (second part of Embodiment 1 of FIG. 6).

The spatial frequency on the horizontal axis in each spectrum in FIG. 7 is the wave number of each spectrum with respect to the full width of the pattern.

In the pattern at the position P in Comparative Example 1 in FIG. 6 (the second row in Comparative Example 1 in FIG. 6), it is assumed that the cycle of the dark portion (D), the bright portion (B), and the dark portion (D) is repeated four times. I can say. This is also observed from the fact that a peak appears at spatial frequency 4 in the spectrum (upper part of FIG. 7) in Comparative Example 1 in FIG.

From the results of FIGS. 6 and 7, it can be said that moire components that are conspicuous to human vision are components at low spatial frequencies (for example, about 1 or more and 10 or less). On the other hand, for components with high spatial frequencies (for example, approximately 50 or higher), the distance between moiré light and dark becomes short, making it difficult for human eyes to distinguish moiré. Therefore, it can be said that the components at high spatial frequencies are not conspicuous to human vision.

In FIG. 7, the low spatial frequencies of the spectrum of Embodiment 1 (lower part of FIG. 7), especially the magnitude of peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 7) is smaller than the magnitude of the peak at the low spatial frequencies of the spectrum of Comparative Example 1 (upper part of FIG. 7), especially at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 7) It's getting smaller. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 6) is less conspicuous than the moire of Comparative Example 1 (the second row of Comparative Example 1 of FIG. 6).

In the spectrum of Embodiment 1 shown in FIG. 7, peaks appear at and around spatial frequency 100, but components at high spatial frequencies can be said to be inconspicuous to human vision, as described above. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 6) is not conspicuous due to the spatial frequency 100 and the surrounding peaks in the spectrum of Embodiment 1 in FIG. 7 (lower row of FIG. 7). .

FIG. 8 is a diagram for explaining the light emitting region 140 according to the second example of the first embodiment. The example shown in FIG. 8 is similar to the example shown in FIG. 6, except for the following points.

In the pattern of the light emitting region 140 in Embodiment 1 of FIG. 8 (the first stage of Embodiment 1 of FIG. 8), the width of the plurality of translucent portions 144 differs depending on the position within the light emitting region 140 . In particular, in the example shown in FIG. 8, a transparent portion 144 having a first width, a transparent portion 144 having a second width equal to the first width, a transparent portion 144 having a third width narrower than the first width, and a third width. Translucent portions 144 having a fourth width wider than one width are arranged repeatedly. In this manner, the widths of the plurality of light-transmitting portions 144 change periodically in the arrangement direction of the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 .

FIG. 9 shows the spectrum (upper part of FIG. 9) obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 9 is a diagram showing a spectrum (lower part of FIG. 9) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 8) at position P of .

In FIG. 9, the low spatial frequencies of the spectrum of Embodiment 1 (lower part of FIG. 9), especially the magnitude of peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 9) is smaller than the magnitude of the peak at the low spatial frequencies of the spectrum of Comparative Example 1 (upper part of FIG. 9), especially at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 9) It's getting smaller. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 8) is less conspicuous than the moire of Comparative Example 1 (the second row of Comparative Example 1 of FIG. 8).

In the spectrum of Embodiment 1 in FIG. 9, peaks appear at spatial frequency 50 and its surroundings, spatial frequency 100 and its surroundings, and spatial frequency 150 and its surroundings, but the components at high spatial frequencies are as described above. , can be said to be an inconspicuous component for human vision. Therefore, the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 8) is the spatial frequency 50 and its surroundings, the spatial frequency 100 and its surroundings, and the space in the spectrum of Embodiment 1 in FIG. 9 (lower row of FIG. 9) It can be said that the peaks at and around frequency 150 are not noticeable.

FIG. 10 is a diagram for explaining the light emitting region 140 according to the third example of the first embodiment. The example shown in FIG. 10 is similar to the example shown in FIG. 8, except for the following points.

In the pattern of the light emitting region 140 in Embodiment 1 of FIG. 10 (the first row of Embodiment 1 of FIG. 10), the widths of the plurality of translucent portions 144 differ depending on the position within the light emitting region 140 . In particular, in the example shown in FIG. 10, the light transmitting portion 144 having the first width, the light transmitting portion 144 having the second width equal to the first width, the light transmitting portion 144 having the third width equal to the first width, the first width A light transmitting portion 144 having a fourth width equal to the width, a light transmitting portion 144 having a fifth width equal to the first width, and a light transmitting portion 144 having a sixth width greater than the first width are arranged repeatedly. In this manner, the widths of the plurality of light-transmitting portions 144 change periodically in the arrangement direction of the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 .

FIG. 11 shows the spectrum (upper part of FIG. 11) obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. 11 is a diagram showing a spectrum (lower part of FIG. 11) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 10) at position P of .

In FIG. 11, the low spatial frequencies of the spectrum of Embodiment 1 (lower part of FIG. 11), especially the magnitude of peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 11) is smaller than the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 11) in the spectrum of Comparative Example 1 (upper part of FIG. 11). It's getting smaller. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 10) is less conspicuous than the moire of Comparative Example 1 (the second row of Comparative Example 1 of FIG. 10).

In the spectrum of Embodiment 1 in FIG. 11, peaks appear at spatial frequency 33 and its surroundings, spatial frequency 66 and its surroundings, spatial frequency 99 and its surroundings, spatial frequency 132 and its surroundings, and spatial frequency 165 and its surroundings. However, as described above, the components at high spatial frequencies can be said to be inconspicuous to human vision. Therefore, the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 10) is the spatial frequency 33 and its surroundings, the spatial frequency 66 and its surroundings, and the space in the spectrum of Embodiment 1 in FIG. It can be said that the peaks at and around frequency 99, at and around spatial frequency 132, and at and around spatial frequency 165 are not noticeable.

FIG. 12 is a diagram for explaining the light emitting region 140 according to the fourth example of the first embodiment. The example shown in FIG. 112 is similar to the example shown in FIG. 8, except for the following points.

In the pattern of the light-emitting region 140 in Embodiment 1 of FIG. 12 (the first row of Embodiment 1 of FIG. 12), the width of the plurality of translucent portions 144 differs depending on the position within the light-emitting region 140 . In particular, in the example shown in FIG. 12, the translucent portion 144 having the first width, the translucent portion 144 having the second width equal to the first width, the translucent portion 144 having the third width equal to the first width, and the first width Translucent portions 144 having a fourth width wider than the width are arranged repeatedly. In this manner, the widths of the plurality of light-transmitting portions 144 change periodically in the arrangement direction of the plurality of light-emitting portions 142 and the plurality of light-transmitting portions 144 .

FIG. 13 shows the spectrum (upper part of FIG. 13) obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 13 is a diagram showing a spectrum (lower part of FIG. 13) obtained by Fourier transforming a pattern (second part of Embodiment 1 of FIG. 12) at position P of .

In FIG. 13, the low spatial frequencies of the spectrum of Embodiment 1 (lower part of FIG. 13), especially the magnitude of peaks at 1 or more and 10 or less (magnitude of spatial frequency 4 component surrounded by a dashed circle in FIG. 13) is the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less in the spectrum of Comparative Example 1 (upper part of FIG. 13) (the magnitude of the component of spatial frequency 4 surrounded by the dashed circle in FIG. 13) It's getting smaller. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 12) is less conspicuous than the moire of Comparative Example 1 (the second row of Comparative Example 1 of FIG. 12).

In the spectrum of Embodiment 1 in FIG. 13, peaks appear at spatial frequency 50 and its surroundings, spatial frequency 100 and its surroundings, and spatial frequency 150 and its surroundings, but the components at high spatial frequencies are as described above. , can be said to be an inconspicuous component for human vision. Therefore, the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 12) is the spatial frequency 50 and its surroundings, the spatial frequency 100 and its surroundings, and the space in the spectrum of Embodiment 1 in FIG. It can be said that the peaks at and around frequency 150 are not noticeable.

FIG. 14 is a diagram for explaining the light emitting region 140 according to the fifth example of the first embodiment. The example shown in FIG. 14 is similar to the example shown in FIG. 8, except for the following points.

In the pattern of the light emitting region 140 in Embodiment 1 of FIG. 14 (the first row of Embodiment 1 of FIG. 14), the widths of the plurality of light emitting portions 142 differ depending on the position within the light emitting region 140 . In particular, in the example shown in FIG. 14, light-emitting portions 142 (first light-emitting portions) having a first width and light-emitting portions 142 (second light-emitting portions) having a second width narrower than the first width are arranged alternately. In this manner, the widths of the plurality of light emitting portions 142 change periodically in the arrangement direction of the plurality of light emitting portions 142 and the plurality of light transmitting portions 144 .

In addition, in Embodiment 1 of FIG. 14, the plurality of light emitting units 142 are arranged at regular intervals. In another example, the widths of the plurality of translucent portions 144 may be constant regardless of their positions within the light emitting region 140 .

The distance Δ shown in FIG. 5 may vary depending on the width of the light-emitting portion 142 . In particular, the distance Δ may increase as the width of the light emitting section 142 increases. For example, the distance Δ of the above-described second light-emitting portion (light-emitting portion narrower than the above-described first light-emitting portion) may be smaller than the above-described distance Δ of the first light-emitting portion.

The distance Δ shown in FIG. 5 may be substantially the same regardless of the width of the light emitting portion 142 . For example, the distance Δ of each light emitting unit 142 can be 95% or more and 105% or less of the average of the distances Δ of the plurality of light emitting units 142 .

FIG. 15 shows the spectrum (upper part of FIG. 15) obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 15 is a diagram showing a spectrum (lower part of FIG. 15) obtained by Fourier transforming the pattern at the position P of (second part of FIG. 14 of Embodiment 1).

In FIG. 15, the low spatial frequencies of the spectrum of Embodiment 1 (lower part of FIG. 15), especially the magnitude of the peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 15) is smaller than the magnitude of the peak at the low spatial frequencies of the spectrum of Comparative Example 1 (upper part of FIG. 15), especially at 1 or more and 10 or less (the magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 15) It's getting smaller. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 14) is less conspicuous than the moire of Comparative Example 1 (the second row of Comparative Example 1 of FIG. 14).

In the spectrum of Embodiment 1 in FIG. 15, peaks appear at and around spatial frequency 100, but the components at high spatial frequencies can be said to be inconspicuous to human vision, as described above. Therefore, it can be said that the moiré of Embodiment 1 (the second row of Embodiment 1 in FIG. 14) is not conspicuous due to the spatial frequency 100 and the surrounding peaks in the spectrum of Embodiment 1 in FIG. 15 (lower row of FIG. 15). .

FIG. 16 is a diagram for explaining the light emitting region 140 according to the sixth example of the first embodiment. The example shown in FIG. 16 is similar to the example shown in FIG. 14, except for the following points.

In the pattern of the plurality of light-emitting portions 142 in the light-emitting region 140 in Embodiment 1 of FIG. there is In particular, in the example shown in FIG. 16, a light emitting portion 142 having a first width, a light emitting portion 142 having a second width equal to the first width, a light emitting portion 142 having a third width narrower than the first width, and a light emitting portion 142 having a third width narrower than the first width. Light-emitting portions 142 having a fourth wide width are repeatedly arranged. In this manner, the widths of the plurality of light emitting portions 142 change periodically in the arrangement direction of the plurality of light emitting portions 142 and the plurality of light transmitting portions 144 .

FIG. 17 shows the spectrum (upper part of FIG. 17) obtained by Fourier transforming the pattern at position P in Comparative Example 1 in FIG. FIG. 17 is a diagram showing a spectrum (lower part of FIG. 17) obtained by Fourier transforming the pattern at position P (second part of Embodiment 1 of FIG. 16).

In FIG. 17, the low spatial frequencies of the spectrum of Embodiment 1 (lower part of FIG. 17), especially the magnitude of peaks at 1 or more and 10 or less (magnitude of spatial frequency 4 components surrounded by dashed circles in FIG. 17) is smaller than the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less in the spectrum of Comparative Example 1 (upper part of FIG. 17) (magnitude of the spatial frequency 4 component surrounded by the dashed circle in FIG. 17) It's getting smaller. Therefore, it can be said that the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 16) is less conspicuous than the moire of Comparative Example 1 (the second row of Comparative Example 1 of FIG. 16).

In the spectrum of Embodiment 1 in FIG. 17, peaks appear at spatial frequency 50 and its surroundings, spatial frequency 100 and its surroundings, and spatial frequency 150 and its surroundings, but the components at high spatial frequencies are as described above. , can be said to be an inconspicuous component for human vision. Therefore, the moire of Embodiment 1 (the second row of Embodiment 1 in FIG. 16) is the spatial frequency 50 and its surroundings, the spatial frequency 100 and its surroundings, and the space in the spectrum of Embodiment 1 in FIG. 17 (lower row of FIG. 17) It can be said that the peaks at and around frequency 150 are not noticeable.

FIG. 18 is a diagram for explaining a first example of details of the light emitting region 140 shown in FIG. 10 or FIG.

The light emitting region 140 has a plurality of partial light emitting regions 140a. Each partial light-emitting region 140 a has a plurality of light-emitting portions 142 and a plurality of light-transmitting portions 144 . The plurality of partial light emitting regions 140a are provided on a common substrate (substrate 100).

The light-emitting region 140 has light-transmitting portions 144 (light-transmitting portions 144a) between adjacent light-emitting portions 142 in the partial light-emitting regions 140a. It has an optical part 144b). The width of the translucent portion 144b is wider than the width of the translucent portion 144a. Therefore, the widths of the plurality of translucent portions 144 differ depending on the positions within the light emitting region 140 . In particular, in the example shown in FIG. 18, the width of the plurality of translucent portions 144 varies periodically depending on the position within the light emitting region 140. The width of the light transmitting portion 144a is between them, and the width of the light transmitting portion 144b is between the adjacent partial light emitting regions 140a.

FIG. 19 is a diagram for explaining a second example of details of the light emitting region 140 shown in FIG. 10 or FIG. The example shown in FIG. 19 is similar to the example shown in FIG. 18, except for the following points.

The light emitting member 10 has a plurality of substrates 100 and a plurality of partial light emitting regions 140a. The plurality of partial light emitting regions 140a are provided on the plurality of substrates 100, respectively. In other words, the light emitting region 140 is positioned over the multiple substrates 100 . In the example shown in FIG. 19 as well, the regions between the adjacent partial light emitting regions 140a are translucent portions 144b.

As described above, according to the present embodiment, the moire that can be caused by the pattern of the plurality of light emitting portions 142 in the light emitting region 140 and the pattern of the light reflected on the transparent member 20 by the light from the plurality of light emitting portions 142 is made inconspicuous. can be done.

(Embodiment 2)
FIG. 20 is a diagram for explaining the light emitting device 30 according to the first example of the second embodiment. The light emitting device 30 shown in FIG. 20 is the same as the light emitting device 30 according to Embodiment 1 except for the following points.

A light-emitting device 30 includes a light-emitting member 10 and a light-transmitting member 20 .

The light emitting member 10 shown in FIG. 20 is similar to the light emitting member 10 shown in FIGS. In particular, the light-emitting member 10 is positioned so that the second surface 104 of the substrate 100 faces the light-transmitting member 20 , and the plurality of light-emitting units 142 are positioned on the first surface 102 side of the substrate 100 .

The translucent member 20 is convexly curved toward the side opposite to the light emitting member 10 . The light emitting member 10 has a flat shape. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position, and specifically, the distance d increases toward the center of the light-transmitting member 20 . In this way, the translucent member 20 has a first portion (e.g., point A 1 in FIG. 20) separated from the light-emitting member 10 by a first distance (e.g., point A ₁ in FIG. 20) and a second portion (e.g., , point A ₂ ) in FIG. Especially in the example shown in FIG. 20, the distance d _A1 between the point A ₁ and the light emitting member 10 is larger than the distance d _A2 between the point A ₂ and the light emitting member 10 .

In particular, in the example shown in FIG. 20, the translucent member 20 is curved along an arc having a center C on a straight line (the y-axis in FIG. 20) that intersects the light-emitting member 10 perpendicularly. The light emitting member 10 can be a high mount stop lamp attached to the rear glass of a moving object (eg, automobile). In the extending direction of the straight line (the y-axis direction in FIG. 20), the driver's seat D of the mobile body is located farther from the light emitting member 10 than the center C of the arc.

FIG. 21 is a diagram for explaining an example of moiré by the light emitting device 30 shown in FIG.

In Embodiment 2, the translucent member 20 is curved as described above. Furthermore, in Embodiment 2, the plurality of light-emitting portions 142 are arranged at regular intervals, the widths of the plurality of light-emitting portions 142 are substantially the same, and the widths of the plurality of light-transmitting portions 144 are are substantially identical to each other.

Comparative Example 2 is the same as Embodiment 2 except that the translucent member 20 has a flat shape.

FIG. 22 shows the spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 21 (upper part of FIG. 22) and the pattern at position P in Embodiment 2 in FIG. FIG. 22 shows the obtained spectrum (lower part of FIG. 22).

In the pattern at position P in Comparative Example 2 in FIG. 21, it can be said that the cycle of bright portion (B), dark portion (D), and bright portion (B) is repeated once. This is also observed from the fact that a peak appears at spatial frequency 1 in the spectrum (upper part of FIG. 22) in Comparative Example 2 in FIG.

In FIG. 22, the low spatial frequencies of the spectrum of Embodiment 2 (lower part of FIG. 22), especially the magnitude of the peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 22) is the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less in the spectrum of Comparative Example 2 (upper part of FIG. 22) (the magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 22) It's getting smaller. Therefore, it can be said that the moiré of Embodiment 2 (FIG. 21) is less conspicuous than the moiré of Comparative Example 2 (FIG. 21).

FIG. 23 is a diagram for explaining the reason why moire becomes inconspicuous in the second embodiment.

The four spectra in FIG. 23 are obtained by Fourier transforming the pattern at position P when both the light-emitting member 10 and the light-transmitting member 20 have flat shapes. The distance between the position P and the translucent member 20 is common in any spectrum. In the spectra on the first, second, third, and fourth stages, the distance d between the light-emitting member 10 and the translucent member 20 is Δd, 2Δd, 4Δd, and 8Δd, respectively.

Each spectrum has peaks at different spatial frequencies at low spatial frequencies. Specifically, the spectrum on the first tier has a peak at spatial frequency 1, the spectrum on the second tier has a peak at spatial frequency 2, the spectrum on the third tier has a peak at spatial frequency 4, The spectrum in the fourth row has a peak at spatial frequency 8.

The results shown in FIG. 23 suggest that the peak position at low spatial frequencies can be controlled by the distance d between the light-emitting member 10 and the light-transmitting member 20 . Therefore, by varying the distance d between the light-emitting member 10 and the light-transmitting member 20 depending on the position, it can be said that uneven distribution of the peak at a specific spatial frequency can be prevented and the peak can be dispersed. In this way, it can be said that moire becomes inconspicuous in the second embodiment.

FIG. 24 is a diagram for explaining the light emitting device 30 according to the second example of the second embodiment. The light emitting device 30 shown in FIG. 24 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The translucent member 20 is convexly curved toward the light emitting member 10 side. The light emitting member 10 has a flat shape. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position, and specifically, it becomes smaller toward the center of the light-transmitting member 20 . In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 24) and a second portion separated by a second distance different from the first distance (eg, , point A ₂ ) in FIG. Especially in the example shown in FIG. 24, the distance d _A1 between the point A ₁ and the light emitting member 10 is smaller than the distance d _A2 between the point A ₂ and the light emitting member 10 .

FIG. 25 is a diagram for explaining an example of moiré by the light emitting device 30 shown in FIG. 24. FIG. FIG. 26 shows the spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 25 (upper part of FIG. 26) and the pattern at position P in Embodiment 2 in FIG. FIG. 26 shows the obtained spectrum (lower part of FIG. 26). The examples shown in FIGS. 25 and 26 are similar to the examples shown in FIGS. 21 and 22, except for the following points.

In FIG. 26, the low spatial frequencies of the spectrum of Embodiment 2 (lower part of FIG. 26), especially the magnitude of peaks at 1 or more and 10 or less (magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 26) is the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less in the spectrum of Comparative Example 2 (upper part of FIG. 26) (the magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 26) It's getting smaller. Therefore, it can be said that the moiré of Embodiment 2 (FIG. 25) is less conspicuous than the moiré of Comparative Example 2 (FIG. 25).

FIG. 27 is a diagram for explaining the light emitting device 30 according to the third example of the second embodiment. The light emitting device 30 shown in FIG. 27 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The light-transmitting member 20 has a shape along waves vibrating in a direction toward the light-emitting member 10 and a direction away from the light-emitting member 10 (particularly, in the example shown in FIG. 27, a direction perpendicular to the light-emitting member 10). , in the example shown in FIG. 27, is curved along a sine wave. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position. In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 27) and a second portion separated by a second distance different from the first distance (eg, point A 1 in FIG. 27). , point A ₂ ) in FIG. Especially in the example shown in FIG. 27, the distance d _A1 between the point A ₁ and the light emitting member 10 is larger than the distance d _A2 between the point A ₂ and the light emitting member 10 .

FIG. 28 is a diagram for explaining an example of moiré by the light emitting device 30 shown in FIG. 27. FIG. FIG. 29 shows the spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 28 (the upper part of FIG. 29) and the pattern at position P in Embodiment 2 in FIG. FIG. 29 shows the obtained spectrum (lower part of FIG. 29). The examples shown in FIGS. 28 and 29 are similar to the examples shown in FIGS. 21 and 22, except for the following points.

In FIG. 29, the low spatial frequencies of the spectrum of Embodiment 2 (lower part of FIG. 29), especially the magnitude of peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 29) is the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less in the spectrum of Comparative Example 2 (upper part of FIG. 29) (the magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 29) It's getting smaller. Therefore, it can be said that the moiré of Embodiment 2 (FIG. 28) is less conspicuous than the moiré of Comparative Example 2 (FIG. 28).

FIG. 30 is a diagram for explaining the light emitting device 30 according to the fourth example of the second embodiment. The light emitting device 30 shown in FIG. 30 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The light-transmitting member 20 has a shape along waves vibrating in a direction toward the light-emitting member 10 and a direction away from the light-emitting member 10 (particularly, in the example shown in FIG. 30, a direction perpendicular to the light-emitting member 10). , in the example shown in FIG. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position. In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 30) and a second portion separated by a second distance different from the first distance (eg, , point A ₂ in FIG. 30). Especially in the example shown in FIG. 30, the distance d _A1 between the point A ₁ and the light emitting member 10 is larger than the distance d _A2 between the point A ₂ and the light emitting member 10 .

FIG. 31 is a diagram for explaining an example of moiré by the light emitting device 30 shown in FIG. FIG. 32 shows the spectrum obtained by Fourier transforming the pattern at position P in Comparative Example 2 in FIG. 31 (the upper part of FIG. 32 ) and the pattern at position P in Embodiment 2 in FIG. FIG. 32 shows the obtained spectrum (lower part of FIG. 32). The example shown in FIGS. 31 and 32 is similar to the example shown in FIGS. 21 and 22 except for the following points.

In FIG. 32, the low spatial frequencies of the spectrum of Embodiment 2 (lower part of FIG. 32), especially the magnitude of the peaks at 1 or more and 10 or less (the magnitude of the spatial frequency 1 component surrounded by the dashed circle in FIG. 32) is the magnitude of the peak at low spatial frequencies, especially at 1 or more and 10 or less in the spectrum of Comparative Example 2 (upper part of FIG. 32) (the magnitude of the component of spatial frequency 1 surrounded by the dashed circle in FIG. 32) It's getting smaller. Therefore, it can be said that the moiré of Embodiment 2 (FIG. 31) is less conspicuous than the moiré of Comparative Example 2 (FIG. 31).

FIG. 33 is a diagram for explaining the light emitting device 30 according to the fifth example of the second embodiment. The light emitting device 30 shown in FIG. 33 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The light-emitting member 10 is convexly curved toward the light-transmitting member 20 side. The translucent member 20 has a flat shape. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position. In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 33) and a second portion separated by a second distance different from the first distance (eg, point A 1 in FIG. 33). , point A ₂ in FIG. 33). Especially in the example shown in FIG. 33, the distance d _A1 between the point A ₁ and the light emitting member 10 is smaller than the distance d _A2 between the point A ₂ and the light emitting member 10 .

In the example shown in FIG. 33, the distance d between the light emitting member 10 and the translucent member 20 differs depending on the position. Therefore, for the same reason as explained with reference to FIG. 23, the moire becomes inconspicuous.

FIG. 34 is a diagram for explaining the light emitting device 30 according to the sixth example of the second embodiment. The light emitting device 30 shown in FIG. 34 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The light-emitting member 10 is convexly curved toward the opposite side of the light-transmitting member 20 . The translucent member 20 has a flat shape. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position. In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 34) and a second portion separated by a second distance different from the first distance (eg, , point A ₂ in FIG. 34). Especially in the example shown in FIG. 34, the distance d _A1 between the point A ₁ and the light emitting member 10 is larger than the distance d _A2 between the point A ₂ and the light emitting member 10 .

In the example shown in FIG. 34, the distance d between the light emitting member 10 and the translucent member 20 differs depending on the position. Therefore, for the same reason as explained with reference to FIG. 23, the moire becomes inconspicuous.

FIG. 35 is a diagram for explaining the light emitting device 30 according to the seventh example of the second embodiment. The light emitting device 30 shown in FIG. 35 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The light-emitting member 10 has a shape along waves vibrating in a direction toward the light-transmitting member 20 and a direction away from the light-transmitting member 20 (particularly, in the example shown in FIG. 35, a direction perpendicular to the light-transmitting member 20). , and in the example shown in FIG. 35, it curves along a sine wave. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position. In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 35) and a second portion separated by a second distance different from the first distance (eg, , point A ₂ ) in FIG. Especially in the example shown in FIG. 35, the distance d _A1 between the point A ₁ and the light emitting member 10 is smaller than the distance d _A2 between the point A ₂ and the light emitting member 10 .

In the example shown in FIG. 35, the distance d between the light emitting member 10 and the translucent member 20 differs depending on the position. Therefore, for the same reason as explained with reference to FIG. 23, the moire becomes inconspicuous.

FIG. 36 is a diagram for explaining the light-emitting device 30 according to the eighth example of the second embodiment. The light emitting device 30 shown in FIG. 36 is the same as the light emitting device 30 shown in FIG. 20 except for the following points.

The light-emitting member 10 has a shape along waves vibrating in a direction toward the light-transmitting member 20 and a direction away from the light-transmitting member 20 (in particular, in the example shown in FIG. 36, a direction perpendicular to the light-transmitting member 20). , and in the example shown in FIG. 36, it is bent along a triangular wave. Therefore, the distance d between the light-emitting member 10 and the light-transmitting member 20 differs depending on the position. In this way, the translucent member 20 has a first portion separated from the light emitting member 10 by a first distance (eg, point A ₁ in FIG. 36) and a second portion separated by a second distance different from the first distance (eg, point A 1 in FIG. 36). , point A ₂ ) in FIG. Especially in the example shown in FIG. 36, the distance d _A1 between the point A ₁ and the light emitting member 10 is smaller than the distance d _A2 between the point A ₂ and the light emitting member 10 .

In the example shown in FIG. 36, the distance d between the light emitting member 10 and the translucent member 20 differs depending on the position. Therefore, for the same reason as explained with reference to FIG. 23, the moire becomes inconspicuous.

As described above, according to the present embodiment, the moire that can be caused by the pattern of the plurality of light emitting portions 142 in the light emitting region 140 and the pattern of the light reflected on the transparent member 20 by the light from the plurality of light emitting portions 142 is made inconspicuous. can be done.

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 member 20 Translucent member 22 Surface 24 Surface 30 Light-emitting device 100 Substrate 102 First surface 104 Second surface 110 First electrode 120 Organic layer 130 Second electrode 140 Light-emitting region 140a Partial light-emitting region 142 Light-emitting portion 144 Light-transmitting portion 144a Translucent portion 144b Translucent portion

Claims (3)

a light-emitting region having a plurality of light-emitting portions aligned in a predetermined arrangement direction and emitting light in a first color, and a plurality of light-transmitting portions positioned between the adjacent light-emitting portions;
a light-transmitting member positioned on the light-emitting surface side of the light-emitting region and spaced apart from the light-emitting region;
with
each of the plurality of light emitting units is a rectangle having a pair of long sides extending in a first direction intersecting with the arrangement direction;
The light-emitting device , wherein widths of the plurality of light-emitting portions are periodically changed in the arrangement direction . The light emitting device according to claim 1,
The light-emitting device, wherein widths of the plurality of light-transmitting portions are constant in the arrangement direction. The light emitting device according to claim 1 or 2,
The light-emitting device according to claim 1, wherein the plurality of light-emitting portions includes light-emitting portions having at least three different widths in the arrangement direction.

Images