DISPLAY DEVICE

In a display device according to the present disclosure, a reflective film surrounding a display region reflects the light from outside from a lower surface side of an element substrate in the same manner as a metal electrode layer of a light emitting display portion covering the display region. Due to reflection occurring in the same manner on an inner side and an outer side of a contour of the display region, the contour of the display region is unlikely to be visually recognized.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2020-042361, filed on 11 Mar., 2020, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a display device.

BACKGROUND

In the related art, an organic EL display is employed as a small-sized display for in-vehicle use. A display device such as an organic EL display is provided with a display region with a lamination structure having an organic EL light emitting layer interposed between a transparent electrode layer and a metal electrode layer.

SUMMARY

In the foregoing display device, since the metal electrode layer has a relatively high reflectance, a contour of the display region becomes conspicuous, and this may cause degradation in design. For this reason, a state in which a contour of a display region cannot be seen with the naked eye is desired.

According to the present disclosure, a display device in which a contour of a display region is unlikely to be visually recognized is provided.

According to the present disclosure, there is provided a display device including a substrate having translucency and having a display region, a light emitting display portion having a transparent electrode layer and a metal electrode layer, the transparent electrode layer and the metal electrode layer are parallel to the substrate and overlapping each other with a light emitting layer therebetween, the transparent electrode layer is positioned on a side closer to the substrate than to the metal electrode layer, the light emitting display portion covers entire region of the display region from one surface side of the substrate, and a reflective film surrounding the display region of the substrate along an outer edge of the display region and configured to reflect light from the other surface side of the substrate.

In the foregoing display device, the reflective film surrounding the display region reflects light from the other surface side of the substrate in the same manner as the metal electrode layer of the light emitting display portion covering the display region. In this manner, due to reflection occurring in the same manner on an inner side and an outer side of the display region, a contour of the display region is unlikely to be visually recognized.

The display device according to the aspect may further include a reflected light removal filter covering the other surface of the substrate. In this case, reflected light of the reflective film and the metal electrode layer can be removed.

The display device according to the aspect may further include a light weakening filter covering the other surface of the substrate. In this case, the contour of the display region can be made less likely to he visually recognized.

In the display device according to the aspect, the reflective film may have the same reflectance as the metal electrode layer. In this case, the contour of the display region can be made less likely to be visually recognized.

In the display device according to the aspect, the reflective film may be constituted of the same metal material as the metal electrode layer. In this case, the contour of the display region can be made less likely to be visually recognized.

In the display device according to the aspect, an inner edge of the reflective film may have an overlapping region, the reflective film and the light emitting display portion overlap each other in the overlapping region. At least the overlapping region on a surface of the reflective film on the light emitting display portion side may be an antireflection surface preventing reflection of light of the light emitting display portion. In this case, it is possible to prevent reflection of the light emitted from the light emitting display portion in the surface of the reflective film on the light emitting display portion side.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same reference signs are used for the same elements or elements having the same function, and duplicate description will be omitted.

First Embodiment

As illustrated inFIG. 1, a display device1according to a first embodiment is configured to include a display panel10and a mask portion30. The display device1illustrated inFIG. 1is a bottom emission-type organic EL display device and emits light downward on the paper ofFIG. 1.

The display panel10has a light emitting display portion12, an element substrate20, and a sealing substrate22.

The element substrate20(substrate) is a substrate used when the light emitting display portion12is formed. The element substrate20has a flat-plate external shape and has an upper surface20a(one surface) and a lower surface20b(the other surface). The element substrate20is a substrate having translucency and can be constituted of a glass, a resin film, or the like. In the present embodiment, the element substrate20is constituted of a transparent glass. A rectangular display region A1is provided at the center of the element substrate20.

The sealing substrate22is positioned on the upper surface20aside of the element substrate20, extends parallel to the element substrate20, and is separated from the element substrate20by a predetermined distance. For example, the sealing substrate22is constituted of a glass, a resin, or the like. The sealing substrate22may have translucency or may not have translucency. A space between the element substrate20and the sealing substrate22may be a void or may be filled with a known sealing material.

The light emitting display portion12is provided on the upper surface20aof the element substrate20and is positioned between the element substrate20and the sealing substrate22. Specifically, the light emitting display portion12is provided such that the entire display region A1on the upper surface20aof the element substrate20is covered, In the present embodiment, a formation region of the light emitting display portion12and the display region A1of the element substrate20are designed such that they coincide with each other. A wiring, a drive circuit, and the like for supplying driving power to the light emitting display portion12are provided in a surrounding region A2of the display region A1on the upper surface20aof the element substrate20, but illustration thereof is omitted. The light emitting display portion12has a lamination structure in which a plurality of layers are laminated in a facing direction of the element substrate20and the sealing substrate22and includes an organic EL light emitting layer14, a pair of electrode layers1.6A and16B, and a sealing layer18.

The organic EL light emitting layer14is a layer including at least an organic compound (light emitting material) emitting light when electrons and positive holes are injected. An organic compound may be a low-molecular-weight compound or may be a high-molecular-weight compound, The organic EL light emitting layer14may have an electron injection layer, an electron transportation layer, a positive hole injection layer, a positive hole transportation layer, and the like, in addition to a light emitting layer including the foregoing light emitting material. In addition, the light emitting material of the organic EL light emitting layer14may be a fluorescent material, may be a phosphorescent material, or may be a material emitting light of a type different from fluorescence and phosphorescence.

Both the pair of electrode layers16A and16B extend parallel to the element substrate20and are provided such that they overlap each other with the organic EL light emitting layer14therebetween. In the pair of electrode layers16A and16B, the electrode layer closer to the element substrate20is a transparent electrode layer16A which functions as an anode, and the transparent electrode layer16A is directly provided on the upper surface20a. For example, a constituent material (anode material) of the transparent electrode layer16A is ITO, IZO, or the like. In the pair of electrode layers16A and16B, the electrode layer farther from the element substrate20is a metal electrode layer16B which functions as a cathode. A constituent material (cathode material) of the metal electrode layer16B is a metal such as Al, Ag, Mg, or Mo or an alloy of these. In the present embodiment, the metal electrode layer16B is constituted of Al. In the present embodiment, each of the transparent electrode layer16A and the metal electrode layer16B is constituted of a plurality of wirings extending in a parallel manner, and each of intersections of the wirings of the transparent electrode layer16A and the wirings of the metal electrode layer16B arranged in a mesh shape constitutes a pixel of the light emitting display portion12.

The sealing layer18has a function of preventing exposure of the organic EL light emitting layer14and the like to moisture or exposure thereof to air by defining a sealing space between the sealing layer18and the sealing substrate22.

The sealing layer18is formed on the metal electrode layer16B and constitutes an uppermost layer of the light emitting display portion12. For example, the sealing layer18is formed of a material such as SiO, SiN, SiON, SiC, SiOC, AlN, or Al2O3.

In the display panel10described above, when a voltage is applied between the pair of electrode layers16A and16B of the light emitting display portion12, the organic EL light emitting layer14emits light, and the light is emitted downward on the paper ofFIG. 1from the lower surface20bside of the element substrate20via the transparent electrode layer16A. Light emitted from the organic EL light emitting layer14is monochromatic white light, for example.

The mask portion30is provided such that the entire lower surface20bof the element substrate20is covered. The mask portion30has a lamination structure, in which a light weakening filter31, a reflected light removal filter32, a film forming substrate34, a reflective film36, and an adhesive layer38are arranged in order of those farther from the lower surface20bof the element substrate20.

The light weakening filter31has a function of weakening light passing therethrough (that is, light incident from outside (from below ofFIG. 1) and light emitted from the light emitting display portion12). As an example, the light weakening filter31is a neutral density filter (ND filter).

The reflected light removal filter32has a function of selectively removing reflected light when light incident from below ofFIG. 1is reflected by the light emitting display portion12. In the present embodiment, the reflected light removal filter32is a circular polarization filter, which selectively removes only the reflected light from light emitted from the light emitting display portion12and reflected light by polarizing light from outside.

The film forming substrate34is a flat plate-shaped substrate for forming the reflective film36. The film forming substrate34has translucency and is constituted of a transparent glass in the present embodiment.

The reflective film36is formed on an upper surface of the film forming substrate34(that is, a surface on the light emitting display portion12side). The reflective film36is constituted of a material having a predetermined reflectance and can be constituted of a metal, an alloy, a resin, or the like. The reflective film36can be constituted of the same material as the constituent material of the metal electrode layer16B (that is, a metal such as Al, Ag, Mg, or Mo or an alloy of these). In the present embodiment, the reflective film36is constituted of Al.

As illustrated inFIGS. 2 and 3, the reflective film36is a film having a rectangular ring shape. The reflective film36has a rectangular hole37at a central part thereof. In the present embodiment, a formation region of the hole37of the reflective film36and the display region A1of the element substrate20are designed such that they coincide with each other. That is, the reflective film36is provided in a region corresponding to the surrounding region A2of the element substrate20. In other words, the reflective film36surrounds the display region A1along an outer edge of the display region A1of the element substrate20.

The reflective film36entirely reflects light incident from below ofFIG. 1on a lower surface36bthereof. Similar to reflected light in the light emitting display portion12, reflected light in the reflective film36is removed by the reflected light removal filter32. The thickness of the reflective film36need only be a thickness capable of entirely reflecting the light from outside described above and is 100 nm as an example.

The adhesive layer38is a layer constituted of an adhesive material for adhering the light weakening filter31, the reflected light removal filter32, the film forming substrate34, and the reflective film36described above to the lower surface20bof the element substrate20of the display panel10. The adhesive layer38is a layer having translucency. For example, it may be a molded layer coated with an optical transparent adhesive or may be an optical transparent adhesive sheet.

The display device1according to the first embodiment has the element substrate20having the display region A1, and the transparent electrode layer16A and the metal electrode layer16B overlapping each other with the organic EL light emitting layer14therebetween. Moreover, the display device1includes the light emitting display portion12covering the entire display region A1of the element substrate20from the upper surface20aside of the element substrate20, and the reflective film36surrounding the display region A1along the outer edge of the display region A1of the element substrate20and reflecting light from the lower surface20bside of the element substrate20.

In the display device1, the reflective film36surrounding the display region A1reflects light from the lower surface20bside of the element substrate20in the same manner as the metal electrode layer16B of the light emitting display portion12covering the display region Al. In this manner, due to reflection occurring in the same manner on an inner side (that is, the display region A1) and an outer side (that is, the surrounding region A2) of a contour of the display region A1, the contour of the display region A1is unlikely to be visually recognized.

Particularly, in the display device1, since the reflective film36and the metal electrode layer16B are constituted of the same metal material (that is, Al;) as each other and have the same reflectance as each other, the display region A1and the surrounding region A2reflect light from outside completely in the same manner. For this reason, the contour of the display region A1is less likely to be visually recognized. The reflectance of the reflective film36may be set in accordance with the reflectance of the entire light emitting display portion12with respect to light from outside instead of the reflectance of the metal electrode layer16B alone. In this case, in order to make the reflectance of the reflective film36and the reflectance of the entire light emitting display portion12close to each other, a dummy organic layer, an edge cover, a separator, or the like may be provided in the light emitting display portion12. The reflective film36may be constituted of a metal material different from that of the metal electrode layer16B or may have a reflectance different from that of the metal electrode layer16B. The reflective film36may have a thickness such that it can stand. by itself (for example, 5 μm or thicker). In such a case, the film looming substrate34can be suitably omitted.

In the display device1, the reflected light removal filter32is provided such that the lower surface20h of the element substrate20is covered. For this reason, when light incident on the display device1from outside via the reflected light removal filter32is reflected by the light emitting display portion12and the reflective film36, reflected light thereof is removed by the reflected light removal filter32. Accordingly, reduction in contrast is prevented. In addition, even when the reflectance in the display region A1and the reflectance in the surrounding region A2differ from each other, the display region A1and the surrounding region A2come in sight in the same manner by preventing the light reflection, and thus the contour of the display region A1is unlikely to be visually recognized.

In addition, the display device1includes the light weakening filter31covering the reflected light removal filter32from a side opposite to the element substrate20side. For this reason, the contour of the display region A1can be made less likely to be visually recognized. When a light weakening rate of the light weakening filter31is high (that is, when the density is high), the contour of the display region A1is unlikely to be conspicuous, but light emitting extraction efficiency of the light emitting display portion12deteriorates. In the display device1, since the contour of the display region A1is unlikely to be visually recognized due to the reflective film36described above, the density of the light weakening filter31can be reduced, or the light weakening filter31can be omitted. Therefore, the light emitting extraction efficiency of the light emitting display portion12can be enhanced, and sufficient light emission can be obtained while a load of the light emitting display portion12is controlled.

Second Embodiment

The bottom emission-type display device1has been described as the first embodiment, but a top emission-type display device1A illustrated inFIG. 4may be adopted. As illustrated inFIG. 4, the display device1A according to a second embodiment is the same organic EL display device as the display device1according to the first embodiment, but this emits light upward onFIG. 4.

The display device1A is configured to include a display panel10A and a mask portion30A.

The display panel10A has the light emitting display portion12, the element substrate20, and the sealing substrate22.

The element substrate20is a substrate used when the light emitting display portion12is formed. For example, the element substrate20according to the second embodiment is constituted of a glass, a resin, or the like. The element substrate20may have translucency or may not have translucency.

The sealing substrate22(substrate) is positioned on the upper surface20aside of the element substrate20, extends parallel to the element substrate20, and is separated from the element substrate20by a predetermined distance. The sealing substrate22has a flat-plate external shape and has an upper surface22a(the other surface) and a lower surface22b(one surface). The sealing substrate22is a substrate having translucency and is constituted of a transparent glass in the present embodiment. Similar to the display region A1of the element substrate20described in the first embodiment, the display region A1is provided in the sealing substrate22. A space between the element substrate20and the sealing substrate22may be filled with a known sealing material24, or the sealing layer18of the light emitting display portion12may come into contact with the sealing substrate22.

Similar to the light emitting display portion12according to the first embodiment, the light emitting display portion12according to the second embodiment is provided on the upper surface20aof the element substrate20and is positioned between the element substrate20and the sealing substrate22. Specifically, the light emitting display portion12is provided such that the entire display region A1of the sealing substrate22is covered, in the present embodiment, the formation region of the light emitting display portion12and the display region A1of the sealing substrate22are designed such that they coincide with each other. Also in the second embodiment, a wiring, a drive circuit, and the like for supplying driving power to the light emitting display portion12are provided on the upper surface20aof the element substrate20, but illustration thereof is omitted. The light emitting display portion12has a lamination structure in which a plurality of layers are laminated in the facing direction of the element substrate20and the sealing substrate22and includes the organic EL light emitting layer14, the pair of electrode layers16A and16B, and the sealing layer18.

In the second embodiment, both the pair of electrode layers16A and16B extend parallel to the sealing substrate22and are provided such that they overlap each other with the organic EL light emitting layer14therebetween, In the pair of electrode layers16A and16B, the electrode layer closer to the sealing substrate22is the transparent electrode layer16A which functions as an anode. In the pair of electrode layers16A and16B, the electrode layer farther from the sealing substrate22is the metal electrode layer16B which functions as a cathode, and the metal electrode layer16B is directly provided on the upper surface20aof the element substrate20. The sealing layer18is formed on the transparent electrode layer16A and constitutes the uppermost layer of the light emitting display portion12.

In the display panel10A according to the second embodiment, when a voltage is applied between the pair of electrode layers16A and16B of the light emitting display portion12, the organic EL light emitting layer14emits light, and the light is emitted upward onFIG. 4from the upper surface22aside of the sealing substrate22via the transparent electrode layer16A.

The mask portion30A is provided such that the entire upper surface22aof the sealing substrate22is covered. The mask portion30A has a lamination structure, in which the light weakening filter31, the reflected light removal filter32, the film forming substrate34, the reflective film36, and the adhesive layer38are arranged in order of those farther from the upper surface22aof the sealing substrate22. That is, the arrangement order in the mask portion30A according to the second embodiment is the same as the arrangement order of the mask portion30according to the first embodiment.

In the second embodiment, when light incident from above the paper ofFIG. 4is reflected by the light emitting display portion12of the display panel10A, the reflected light removal filter32selectively removes the reflected light. The reflective film36is formed on a lower surface of the film forming substrate34(that is, a surface on the light emitting display portion12side), Similar to the reflective film36according to the first embodiment, the reflective film36according to the second embodiment is a film having a rectangular ring shape and has the rectangular hole37at the central part thereof. In the present embodiment, the formation region of the hole37of the reflective film36and the display region A1of the sealing substrate22are designed such that they coincide with each other. That is, the reflective film36is provided in a region corresponding to the surrounding region A2of the sealing substrate22. In other words, the reflective film36surrounds the display region A1along the outer edge of the display region A1of the sealing substrate22. The reflective film36entirely reflects light incident from above the paper ofFIG. 4on an upper surface36athereof, Similar to reflected light in the display panel10A, reflected light in the reflective film36is removed by the reflected light removal filter32.

The display device1A according to the second embodiment has the sealing substrate22having the display region A1, and the transparent electrode layer16A and the metal electrode layer16B overlapping each other with the organic EL light emitting layer14therebetween. Moreover, the display device1A includes the light emitting display portion12covering the entire display region A1of the sealing substrate22from the lower surface22bside of the sealing substrate22, and the reflective film36surrounding the display region A1along the outer edge of the display region A1of the sealing substrate22and reflecting light from the upper surface22aside of the sealing substrate22.

Also in the top emission-type display device1A, similar to the bottom emission-type display device1, the reflective film36surrounding the display region A1reflects light from the upper surface22aside of the sealing substrate22in the same manner as the metal electrode layer16B of the light emitting display portion12covering the display region A1. In the display device1A, due to reflection occurring in the same manner on the inner side (that is, the display region A1) and the outer side (that is, the surrounding region A2) of the contour of the display region A1the contour of the display region A1is unlikely to be visually recognized.

Third Embodiment

In the configuration of the display device1A according to the second embodiment, the sealing substrate22can be omitted. As illustrated inFIG. 5, a display device1B according to a third embodiment differs from the display device1A according to the second embodiment only in that the sealing substrate22and the adhesive layer38are excluded.

The display device IB is configured to include a display panel10B and a mask portion30B. The display panel10B has the light emitting display portion12and the element substrate20and does not have the sealing substrate22.

In the third embodiment, the sealing substrate22of the second embodiment is substituted with the film forming substrate34of the mask portion30B.

The film forming substrate34(substrate) of the mask portion30B is positioned on the upper surface20aside of the element substrate20, extends parallel to the element substrate20, and is separated from the element substrate20by a predetermined distance. The film forming substrate34has a flat-plate external shape and has an upper surface34a(the other surface) and a lower surface34b(one surface). The film forming substrate34has translucency and is constituted of a transparent glass in the present embodiment. The display region A1similar to the display region A1of the element substrate20described in the first embodiment is provided in the film forming substrate34. A space between the element substrate20and the film forming substrate34may be filled with the known sealing material24, or the sealing layer18of the light emitting display portion12may come into contact with the film forming substrate34.

In the third embodiment, both the pair of electrode layers16A and16B extend parallel to the film forming substrate34and are provided such that they overlap each other with the organic EL light emitting layer14therebetween. In the pair of electrode layers16A and16B, the electrode layer closer to the film forming substrate34is the transparent electrode layer16A which functions as an anode. In the pair of electrode layers16A and16B, the electrode layer farther from the film forming substrate34is the metal electrode layer16B which functions as a cathode, and the metal electrode layer16B is directly provided on the upper surface20aof the element substrate20. The sealing layer18is formed on the transparent electrode layer16A and constitutes the uppermost layer of the light emitting display portion12.

In the display panel10B according to the third embodiment, when a voltage is applied between the pair of electrode layers16A and16B of the light emitting display portion12, the organic EL light emitting layer14emits light, and the light is emitted upward onFIG. 5from the upper surface34aside of the film forming substrate34via the transparent electrode layer16A.

The display device1B according to the third embodiment has the film forming substrate34having the display region A1, and the transparent electrode layer16A and the metal electrode layer16B overlapping each other with the organic EL light emitting layer14therebetween. Moreover, the display device1B includes the light emitting display portion12covering the entire display region A1of the film forming substrate34from the lower surface34bside of the film forming substrate34, and the reflective film36surrounding the display region A1along the outer edge of the display region A1of the film forming substrate34and reflecting light from the upper surface34aside of the film forming substrate34.

Also in the display device1B which does not have the sealing substrate22, similar to the display device1A having the sealing substrate22, the reflective film36surrounding the display region A1reflects light from the upper surface34aside of the film forming substrate34in the same manner as the metal electrode layer16B of the light emitting display portion12covering the display region A1. in the display device1B, due to reflection occurring in the same manner on the inner side (that is, the display region A1) and the outer side (that is, the surrounding region A2) of the contour of the display region A1the contour of the display region A1is unlikely to be visually recognized.

In addition, since the display device1B does not have the sealing substrate22, a reflection surface of the display region A1(a reflection surface of the metal electrode layer16B) and a reflection surface of the surrounding region A2(that is, a reflection surface of the reflective film36) are close to each other in a vertical direction. Therefore, compared to the display device1A, the contour of the display region A1is less likely to be visually recognized.

In addition, since the display device1B does not have the sealing substrate22, the number of components is reduced. Accordingly, the display device is miniaturized (thinned) and manufacturing costs are reduced.

Fourth Embodiment

In the configuration of the display device1A according to the second embodiment, the film forming substrate34can be omitted. As illustrated inFIG. 6, a display device1C according to a fourth embodiment differs from the display device1A according to the second embodiment only in that the film forming substrate34and the adhesive layer38are excluded.

The display device IC is configured to include a display panel10C and a mask portion30C. The display panel10C has the same configuration as the display panel10A according to the second embodiment. The mask portion30C has the light weakening filter31, the reflected light removal filter32, and the reflective film36and does not have the film forming substrate34and the adhesive layer38. In the fourth embodiment, the reflective film36is directly formed on the upper surface22aof the sealing substrate22. That is, the film forming substrate34of the second embodiment is substituted with the sealing substrate22.

The display device1C according to the fourth embodiment has the sealing substrate22having the display region A1, and the transparent electrode layer16A and the metal electrode layer16B overlapping each other with the organic EL light emitting layer14therebetween. Moreover, the display device1C includes the light emitting display portion12covering the entire display region A1of the sealing substrate22from the lower surface22bside of the sealing substrate22, and the reflective film36surrounding the display region A1along the outer edge of the display region A1of the sealing substrate22and reflecting light from the upper surface22aside of the sealing substrate22.

Also in the display device1C, which does not have the film forming substrate34, similar to the display device1A having the film forming substrate34, the reflective film36surrounding the display region A1reflects light from the upper surface22aside of the sealing substrate22in the same manner as the metal electrode layer16B of the light emitting display portion12covering the display region A1. In the display device1C, due to reflection occurring in the same manner on the inner side (that is, the display region A1) and the outer side (that is, the surrounding region A2) of the contour of the display region A1the contour of the display region A1is unlikely to be visually recognized.

Since the display device does not have the film forming substrate34, the reflection surface of the display region A1(the reflection surface of the metal electrode layer16B) and the reflection surface of the surrounding region A2(that is, the reflection surface of the reflective film36) are close to each other in the vertical direction. Therefore, compared to the display device1A, the contour of the display region A1is less likely to be visually recognized.

In addition, since the display device1C does not have the film forming substrate34, the number of components is reduced. Accordingly, the display device is miniaturized (thinned) and manufacturing costs are reduced.

Fifth Embodiment

All of the first embodiment to the fourth embodiment described above have a form in which the formation region of the light emitting display portion12coincides with the display region A1, but a form in which the formation region of the light emitting display portion12is larger than the display region A1may be adopted.

As illustrated inFIGS. 7 and 8, a display device1D according to a fifth embodiment has an overlapping region A3in which the reflective film36and the light emitting display portion12overlap each other. More specifically, the overlapping region A3is a region having a. rectangular ring shape in which an inner edge of the reflective film36and an outer edge of the light emitting display portion overlap each other. Further, as illustrated inFIG. 8, the overlapping region A3on the upper surface36aof the reflective film36serves as an antireflection surface40. The antireflection surface40is provided on a surface (that is, the upper surface36a) of the reflective film36on the light emitting display portion12side and prevents reflection of light emitted from the light emitting display portion12by the reflective film36.

As an example, the antireflection surface40can be formed by coating and coloring the overlapping region A3on the upper surface36aof the reflective film36with a pigmented ink using a permanent marker or the like. The color of the pigmented ink may be black or color other than black. As another example, the antireflection surface40may be a colored thin film or the like formed on the upper surface36aof the reflective film36.

When the formation region of the light emitting display portion12is slightly smaller than the display region A1, the contour of the display region A1becomes conspicuous and degradation in design may be caused due to a gap between the formation region of the light emitting display portion12and the display region A1. in order to avoid such degradation in design, the formation region of the light emitting display portion12and the display region A1are designed such that they coincide with each other or are designed such that the formation region of the light emitting display portion12is larger than the display region A1. In a display device in which the formation region of the light emitting display portion12and the display region A1coincide with each other, high positioning accuracy is required at the time of manufacturing the device. Therefore, it is easier to manufacture a display device in which the formation region of the light emitting display portion12is larger than the display region A1. Even in the display device1D in which the formation region of the light emitting display portion12is larger than the display region A1, when the antireflection surface40is not present, for instance, light emitted from the light emitting display portion12is reflected by the upper surface36aof the reflective film36in the overlapping region A3. in this case, light spots are generated on the light emitting display portion12due to reflected light in the reflective film36, and thus a similar reflection image (minor image) is displayed in the light emitting display portion12in addition to images (characters, figures, or the like) actually displayed by light emission.

In the display device1D, due to the antireflection surface40, occurrence of a situation in which light emitted from the light emitting display portion12is reflected by the upper surface36aof the reflective film36is prevented, and thus a reflection image is unlikely to be displayed.

in the reflective film36, only the overlapping region A3on the upper surface36amay serve as the antireflection surface40, or the entire upper surface36amay serve as the antireflection surface40.

In addition, the antireflection surface40may be realized by an optical cavity structure.FIG. 9illustrates a form in which the antireflection surface40of the reflective film36has an optical cavity structure. The optical cavity structure illustrated. inFIG. 9has a light guide layer42and a semi-reflective film44provided on the upper surface36aof the reflective film36, and light taken in from the semi-reflective film44side is confined between the reflective film36and the semi-reflective film44.

The semi-reflective film44can be constituted of metal such as Al, Ag, Mg, Mo, or Cr or an alloy of these. The semi-reflective film44is designed to have a thickness with which semi-reflection (that is, a part of light is reflected and a part is transmitted through) may occur. For example, when the semi-reflective film44is constituted of A1, the thickness thereof is within a range of approximately 30 to 70 Å. The light guide layer42is an organic material layer constituted of an organic material, for example. The light guide layer42can confine the entire light emission spectrum of the light emitting display portion12in the optical cavity structure by adjusting a thickness t thereof. Here, in the optical cavity structure, only light having a wavelength of an integral multiple of 2×t×n (t: a thickness of the light guide layer42, and a refractive index of the light guide layer42) is resonated and output to outside. Therefore, when light emitted from the organic EL light emitting layer14of the light emitting display portion12is monochromatic white light, the light guide layer42is designed such that the thickness t thereof becomes70mu or thicker, and thus the entire light emission spectrum of the light emitting display portion12can be confined in the optical cavity structure.

The present disclosure is not limited to the embodiments described above and can be variously deformed. For example, a flat surface shape of the display region is not limited to a rectangular shape and may be a circular shape, an oval shape, or a polygonal shape.