Image display device and smartphone

Abstract

To provide an image display device capable of arranging a light source part in an existing portion.SOLUTION: An image display device comprises: a housing having an inside surface, an outside surface opposite the inside surface, and an opening part defined by the inside surface; a display unit arranged in the opening part, and having a display surface; and a structure having a light-emitting surface and at least a part of which protrudes from the outside surface when viewed facing the display surface. The structure has: a translucent member having an emission surface and an incident surface, where the emission surface is arranged on the light-emitting surface; and a light source unit that emits light toward the incident surface of the translucent member, and can emit light via the translucent member in a direction in which the display surface faces.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an image display device and a smartphone. [Background technology]

[0002] For example, Patent Document 1 discloses an image display device having a light source unit disposed on a movable sheet that can be extended from a mobile terminal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2021-520171 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of an embodiment of the present disclosure is to provide an image display device that can illuminate a subject when capturing an image from the display side. [Means for solving the problem]

[0005] An image display device according to one embodiment of the present disclosure includes a housing having an inner surface, an outer surface located opposite the inner surface, and an opening defined by the inner surface; a display unit disposed within the opening and having a display surface; and a structure having a light-emitting surface and at least a portion of which protrudes from the outer surface when viewed facing the display surface, wherein the structure includes a translucent member having an exit surface and an entrance surface, the exit surface being disposed on the light-emitting surface; and a light source unit that emits light toward the entrance surface of the translucent member and is capable of emitting light via the translucent member in a direction toward which the display surface is facing. [Effects of the Invention]

[0006] According to the embodiments of the present disclosure, it is possible to provide an image display device in which a light source unit can be arranged in an existing portion. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a schematic diagram of a smartphone including an image display device according to an embodiment, viewed from the side facing a display screen. [Figure 2] 2 is a schematic diagram of a structure included in the image display device according to the embodiment, viewed from the side facing the display screen. FIG. [Figure 3] 2 is a schematic diagram of a structural body included in the image display device according to the embodiment, viewed from the −X side. FIG. [Figure 4] 2 is a schematic diagram of a structural body included in the image display device according to the embodiment, viewed from the +X side. FIG. [Figure 5] FIG. 3 is a schematic cross-sectional view taken along line VV in FIG. 2. [Figure 6] 2 is a schematic cross-sectional view showing a light-emitting section included in a light source section of the image display device according to the embodiment. FIG. [Figure 7] 10 is a schematic diagram of a structure included in an image display device according to one embodiment of a first modified example, viewed from the side facing a display screen. FIG. [Figure 8] 10 is a schematic diagram of a structural body included in an image display device according to one embodiment of the first modified example, viewed from the −X side. FIG. [Figure 9A] 9 is a schematic cross-sectional view taken along line IX-IX in FIG. 7, showing a cross section passing through a first side portion, a second side portion, and the center of the light-transmitting member. [Figure 9B] 10 is a schematic diagram of a structure included in an image display device according to one embodiment of a first modified example, viewed from the side facing a display screen. FIG. [Figure 10] FIG. 10 is a schematic cross-sectional view of a structure included in an image display device according to a second modified example. [Figure 11] FIG. 11 is a schematic cross-sectional view of a structure included in an image display device according to a third modified example. [Figure 12] 10 is a schematic diagram of a structure included in an image display device according to a fourth modified example, viewed from the side facing the display surface. FIG. [Figure 13] 13 is a schematic cross-sectional view taken along line XIII-XIII in FIG. 12. [Figure 14]10 is a schematic diagram of a structure included in an image display device according to a fifth modified example, viewed from the side facing the display surface. FIG. [Figure 15] 15 is a schematic cross-sectional view taken along line XV-XV in FIG. 14. [Figure 16] 13 is a schematic diagram of a structure included in an image display device according to a sixth modified example, viewed from the side facing the display surface. FIG. [Figure 17] FIG. 13 is a schematic diagram of a structural body included in an image display device according to a sixth modified example, viewed from the −X side. DETAILED DESCRIPTION OF THE INVENTION

[0008] An image display device and a smartphone according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, the following embodiments are intended to exemplify an image display device and a smartphone embodying the technical concept of the present embodiment, and are not limited thereto. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of components described in the embodiments are not intended to limit the scope of the present disclosure, but are merely illustrative examples. The size, positional relationships, etc. of components shown in each drawing may be exaggerated for clarity. In the following description, the same names and symbols indicate the same or similar components, and detailed descriptions will be omitted as appropriate. An end view showing only the cut surface may be used as a cross-sectional view.

[0009] In the drawings shown below, directions may be indicated by the X-axis, Y-axis, and Z-axis. The X-axis, Y-axis, and Z-axis are mutually orthogonal directions. The X-direction along the X-axis and the Y-direction along the Y-axis indicate directions along the display surface of the display unit provided in the image display device according to the embodiment. The Z-direction along the Z-axis indicates a direction orthogonal to the light-emitting surface. In other words, the light-emitting surface of the light-emitting unit is parallel to the XY plane, and the Z-axis is orthogonal to the XY plane.

[0010] The direction in which an arrow points in the X direction is referred to as the +X direction or +X side, and the direction opposite to the +X direction is referred to as the -X direction or -X side. The direction in which an arrow points in the Y direction is referred to as the +Y direction or +Y side, and the direction opposite to the +Y direction is referred to as the -Y direction or -Y side. The direction in which an arrow points in the Z direction is referred to as the +Z direction or +Z side, and the direction opposite to the +Z direction is referred to as the -Z direction or -Z side. In the embodiments, the light-emitting unit included in the image display device emits light in the +Z direction, for example. Furthermore, the term "top view" in the embodiments refers to viewing an object from the display surface side of the display unit included in the image display device according to the embodiments. Note that in this specification, in addition to portions that can be directly viewed from above, portions that cannot be directly viewed from above may also be described as being seen through the display surface. However, these do not limit the orientation of the image display device according to the embodiments and the smartphone when in use, and the image display device according to the embodiments and the smartphone may be oriented in any direction.

[0011] For ease of explanation, in this specification, the surface of an object when viewed from the +Z side is referred to as the "top surface," and the surface of an object when viewed from the -Z side is referred to as the "bottom surface." The +Z side of an object may also be referred to as "upper," and the -Z side of an object may also be referred to as "lower." In the following embodiments, "along the X-axis, Y-axis, and Z-axis" includes an object tilted within a range of ±10° relative to these axes. In the embodiments, "orthogonal" may include an error of ±10° relative to 90°.

[0012] Furthermore, in this specification or claims, when there are multiple elements of a certain type and they need to be distinguished from one another, the elements may be prefixed with "first," "second," etc. to distinguish them. Furthermore, the objects distinguished between this specification and the claims may differ. Therefore, even if the claims describe elements with the same prefixes as those in this specification, the objects identified by these elements may not coincide between this specification and the claims.

[0013] For example, if there are elements in this specification that are distinguished by the notation "first," "second," and "third," and the elements marked with "first" and "third" are recited in the claims, or if the elements marked with "first" and the elements not marked with a specific ordinal number are recited in the claims, the elements may be distinguished by the notation "first" and "second" in the claims for clarity. In this case, the elements marked with "first" and "second" in the claims refer to the elements marked with "first" and "third" in this specification, or the elements not marked with a specific ordinal number, respectively. Note that this rule is not limited to elements, and can be applied reasonably and flexibly to other objects as well.

[0014] [Embodiment] <Configuration example of image display device according to embodiment> The configuration of an image display device according to an embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a schematic diagram of a smartphone 200 including an image display device according to an embodiment, viewed from a position facing a display surface 21. FIG. 2 is a schematic diagram of a structure 30 included in the image display device according to an embodiment, viewed from a position facing the display surface 21. FIG. 3 is a schematic diagram of the structure 30 included in the image display device according to an embodiment, viewed from the -X side (in other words, viewed from the side where the display unit 20 is located). FIG. 4 is a schematic diagram of the structure 30 included in the image display device according to an embodiment, viewed from the +X side (in other words, viewed from the side opposite to the side where the display unit 20 is located). The housing 10 is omitted in FIG. 4. FIG. 5 is a schematic cross-sectional view taken along line VV in FIG. 2.

[0015] (Overall composition) 1, the smartphone 200 includes an image display device 100. In addition, in the example shown in FIG.

[0016] 1 to 5, image display device 100 includes a housing 10 having an inner surface 11, an outer surface 12 located opposite inner surface 11, and an opening 13 defined by inner surface 11. Image display device 100 also includes a display unit 20 disposed within opening 13 and having a display surface 21, and a structure 30 having a light-emitting surface 31 and at least a portion of which protrudes from outer surface 12 when viewed facing display surface 21. Structure 30 includes a light-transmitting member 32 having an exit surface 321 and an entrance surface 322, with exit surface 321 disposed on light-emitting surface 31, and a light source unit 33 that emits light toward entrance surface 322 of light-transmitting member 32 and is capable of emitting light via light-transmitting member 32 in a direction toward which display surface 21 faces.

[0017] The housing 10 is a box-shaped member that houses the image display device 100, a control board for the image display device 100, and the like. The housing 10 can be made of a material such as a resin material or a metal material. In the example shown in FIG. 1, the housing 10 has a generally rectangular shape with long and short sides and chamfered corners when viewed from above. That is, the image display device 100 has four outer surfaces 12 each including two long sides and two short sides, and four inner surfaces 11 each including two long sides and two short sides. The size, shape, and the like of the housing 10 can be changed as appropriate depending on the specifications required for the smartphone 200.

[0018] The display unit 20 includes an organic EL (Electro Luminescence) or liquid crystal panel, etc. In the example shown in FIG. 1, the display unit 20 has a shape similar to that of the housing 10, and is a substantially rectangular shape having long and short sides in a top view with chamfered corners. The size, shape, etc. of the display unit 20 can be changed as appropriate according to the specifications required of the smartphone 200. In the example shown in FIG. 1, the display unit 20 has a touch panel function on the display surface 21. The capture button 22 in FIG. 1 is an image displayed on the display surface 21. The capture button 22 is a UI (User Interface) that functions as a button that causes the imaging device to capture an image when touched.

[0019] The imaging device 40 is disposed on the display surface 21 of the display unit 20, and allows the operator of the smartphone 200 to capture an image of himself or herself or multiple people including himself or herself. The imaging device 40 can also be called an imaging device for taking selfies. The imaging device 40 is used for applications such as video calls, video recording, and personal authentication using the smartphone 200.

[0020] The imaging device 40 can capture an image in response to a touch operation of the capture button 22 by an operator of the smartphone 200. For example, when the operator operates the image display device 100 and the smartphone 200 to take a selfie using the imaging device 40, the display surface 21 faces the operator. The operator can capture an image of themselves or multiple people including themselves using the imaging device 40 by performing a touch operation on the capture button 22 while viewing an image of themselves or multiple people including themselves displayed on the display unit 20.

[0021] For example, in a smartphone, due to limitations such as space, it may not be possible to place a light source unit for illumination on the side of the smartphone where the selfie imaging device is located. Smartphones without a light source unit for illumination cannot use illumination when taking pictures for video calls, video recording, personal authentication, or other purposes. Therefore, if the area around the operator is dark, it may be difficult to obtain high-quality images. In this specification, "image" refers to an image obtained by video recording and still image capture.

[0022] On the other hand, in smartphones that do not have a light-emitting unit for illumination on the side where the selfie imaging device is located, the screen light may be used as a flash when capturing a still image with the selfie imaging device. The screen light refers to white light irradiated from the entire display surface of the display unit by displaying a pure white image on the display surface for several seconds. In this case, the display surface functions as a surface light source to illuminate the operator taking the selfie. When the display surface functions as a screen light, the display surface displays a pure white image, so the operator cannot see the image being captured while it is being captured. Therefore, in smartphones, the screen light cannot be used to capture video using the selfie imaging device, and high-quality video may not be obtained in a dark environment around the smartphone or the operator. Furthermore, when capturing video, it may be difficult to capture video in an environment where the operator cannot see the image being captured while capturing the video.

[0023] The image display device 100 according to this embodiment includes a structure 30 that, when viewed facing the display surface 21, at least a portion of which protrudes from the outer surface 12 and has a light-emitting surface 31. The light source unit 33 included in the structure 30 emits light toward the incident surface 322 of the light-transmitting member 32, and can also emit light via the light-transmitting member 32 in the direction toward which the display surface 21 faces. Therefore, this embodiment can provide an image display device 100 in which the light source unit 33 can be arranged in an existing part such as an operation button. This embodiment can also provide a smartphone 200 that includes an image display device 100 in which the light source unit 33 can be arranged in an existing part.

[0024] The image display device 100 uses light emitted from the light source unit 33 in the direction in which the display surface 21 faces as illumination when capturing still images and videos using the selfie imaging device 40, thereby enabling high-quality images to be obtained even when the surroundings of the smartphone 200 or the operator are dark. Furthermore, when capturing videos, the image display device 100 can display the captured image on the display surface 21 during capture, allowing the operator to view the image. This makes it easier for the operator to capture videos. Furthermore, even when the surroundings are dark, the image display device 100 may be able to capture higher-quality still images due to the presence of auxiliary light from the light-emitting unit, and the light emitted from the light source unit 33 in the direction in which the display surface 21 faces can also be used as a flash when capturing still images using the selfie imaging device 40.

[0025] In the image display device 100 shown in FIGS. 1 to 5 , the structure 30 is included in an operation button of the image display device 100 provided on one long side of the outer surface 12 of the housing 10. More specifically, the operation button including the structure 30 is a power button of the image display device 100. In the image display device 100, since the operation button includes the structure 30, it is not necessary to provide the structure 30 as a separate component from the operation button, thereby simplifying the configuration of the image display device 100. The operation button is not limited to the power button of the image display device 100 and may be a button for adjusting the volume of the sound on the image display device 100, or the like. The operation button of the image display device 100 may also be a button used to operate the smartphone 200. Note that the structure 30 is not limited to the operation button of the image display device 100, as long as it is included in an existing part of the image display device 100 and includes a portion at least partially protruding from the outer surface 12 when viewed facing the display surface 21. For example, the structure 30 may be disposed in a power cable socket at least partially protruding from the outer surface 12. Furthermore, the structure 30 may be disposed in a portion protruding from the outer surface 12 in order to improve the design or functionality, such as ease of holding, of the image display device 100. The structure 30 is preferably provided in a position close to the imaging device 40. For example, the structure 30 is preferably provided on the side of the housing 10 that is close to the imaging device 40 (for example, in FIG. 1, on the +Y side when the housing 10 is divided in half in the Y direction). By providing the structure 30 in a position close to the imaging device 40, it is possible to reduce the possibility of unintended shadows appearing in moving or still images.

[0026] (Configuration of structure 30) The configuration of the structure 30 will be described in detail with reference to FIGS.

[0027] The structure 30 shown in FIGS. 2 and 5 is a part of an operation button arranged on the housing 10. A part of the operation button is located inside the housing 10, and a part of the operation button protruding from the outer surface 12 of the housing 10 includes the structure 30. The structure 30 is movable in a direction perpendicular to the direction in which the display surface 21 faces (e.g., the X direction) by pressing the structure 30. Note that in this embodiment, the structure 30 does not only refer to the part protruding from the outer surface 12. For example, the structure 30 includes a part that moves by pressing the structure 30 and fits from the outside of the outer surface 12 to the inside of the housing 10, and a part that fits inside the housing 10 before pressing the structure 30 and supports the light-transmitting member 32 and the light source unit 33. Note that in this embodiment, one of the part that moves by pressing the structure 30 and fits from the outside of the outer surface 12 to the inside of the housing 10 and the part that fits inside the housing 10 before pressing the structure 30 and supports the light-transmitting member 32 and the light source unit 33 may serve the same function as the other.

[0028] The operation button in this embodiment includes a structure 30, a flange 50, and a support 34. The structure 30 has an inner surface 301 and an outer surface 302 located opposite the inner surface. The flange 50 is located on the -X side of the outer surface 302 of the structure 30 and inside the housing 10. The support 34 is a portion that positions and supports the structure 30 on the housing 10, and is located inside the housing 10 and opposite the outer surface 302 of the structure 30 that is pressed by a pressing operation. The structure 30 shown in FIG. 2 has a substantially rectangular shape having long and short sides when viewed from above. The structure 30 shown in FIGS. 2 and 5 includes a through-hole in the light-emitting surface 31, and a translucent member 32 is located inside the through-hole. The structure 30 has a space R surrounded by the inner surface 301 of the structure 30 and the incident surface 322 of the translucent member 32. The structure 30 also includes a substrate 35 on which the light source unit 33 is disposed. The substrate 35 is disposed inside the structure 30 and fixed to the inner surface 301 of the structure 30 with an adhesive member 37. The light source unit 33 is disposed on a surface (for example, the surface on the +Z side) of the substrate 35 disposed inside the structure 30 that faces the light-transmitting member 32. The light source unit 33 can emit light in the direction in which the light-transmitting member 32 is located. The wiring 36 is electrically connected to the substrate 35.

[0029] In this embodiment, the structure 30, the flange 50, and the support 34 are integrally formed from a resin material. The structure 30, the flange 50, and the support 34 may be formed from a base material such as polypropylene resin, polystyrene resin, polyethylene resin, acrylic resin, polycarbonate resin, acrylonitrile styrene (AS) resin, or acrylonitrile butadiene styrene (ABS) resin, and the base material may contain a light-reflecting or light-absorbing material. The structure 30, the flange 50, and the support 34 may be integrally formed from a metal material. Examples of the metal material include aluminum, titanium, and stainless steel. Alternatively, the structure 30, the flange 50, and the support 34 may be formed from different materials.

[0030] The substrate 35 preferably uses an insulating material as its base material, and preferably uses a material that is less transmissive to light emitted from the light source unit 33 and external light. The substrate 35 also preferably uses a material with a certain strength. Specifically, the substrate 35 can be formed using ceramics such as alumina, aluminum nitride, mullite, and silicon nitride, or resins such as phenolic resin, epoxy resin, polyimide resin, BT resin (bismaleimide triazine resin), polyphthalamide resin, and polyester resin as its base material. From the viewpoint of improving heat dissipation, the substrate 35 preferably contains copper. For example, an FPC (Flexible Printed Circuit) can be used for the substrate 35.

[0031] 2 to 5, the light-transmitting member 32 is a lens. Because the light-transmitting member 32 is a lens, the image display device 100 can control the light distribution of the light emitted from the light source unit 33. By controlling the light distribution of the light emitted from the light source unit 33, the image display device 100 can irradiate light suitable for the environment in which the image is captured by the imaging device. The imaging device can obtain a high-quality captured image.

[0032] In the example shown in FIGS. 2 to 5 , the lens in the light-transmitting member 32 has a plurality of concentric elliptical convex portions 323 on the incident surface 322 side. For example, the plurality of convex portions 323 have a Fresnel shape, and the lens in the light-transmitting member 32 is a Fresnel lens. By having the plurality of concentric elliptical convex portions 323 on the incident surface 322 side of the lens in the light-transmitting member 32, the lens in the light-transmitting member 32 can be made thinner in the image display device 100. In addition, in this embodiment, the upper surface of the lens in the light-transmitting member 32 is flat. This reduces the unevenness of the surface of the structure 30 when the lens is arranged. As a result, the image display device 100 and the smartphone 200 can improve the aesthetic appearance and functionality, such as ease of holding and ease of pressing the structure 30. Note that the plurality of convex portions 323 are not limited to a concentric elliptical shape and may be a concentric circular shape. It is preferable that the outer shape of the light-transmitting member 32 in a top view is similar to the shape of the structure 30. For example, when the structure 30 has a substantially rectangular shape in top view, it is preferable that the outer shape of the light-transmitting member 32 also has a shape including long sides, such as a rectangle. This ensures a large ratio of the area of ​​the light-transmitting member 32 to the area of ​​the structure 30 in top view, and can increase the amount of light that exits from the exit surface 321 of the light-transmitting member 32.

[0033] 2 includes a first side portion 324 and a second side portion 325 that is parallel to and has the same length as the first side portion 324. In top view (when viewed facing the display surface 21), the outer shape of the light-transmitting member 32 is a substantially elliptical shape with its elongated direction along the first side portion 324. In top view, both ends of each of the first side portion 324 and the second side portion 325 have an arc-shaped curve connecting one end of the first side portion 324 and one end of the second side portion 325, and an arc-shaped curve connecting the other end of the first side portion 324 and the other end of the second side portion 325. When viewed facing the display surface 21, the light-transmitting member 32 has a shape whose longitudinal direction is along the first side portion 324, and thereby allows light from the light source unit 33 including a plurality of light-emitting units arranged in a direction along the first side portion 324 to pass through and to emit in the direction toward the display surface 21. Furthermore, when viewed facing the display surface 21, both ends of the first side portion 324 and the second side portion 325 have curves, and thus the light-transmitting member 32 reduces vignetting of light from the light source unit 33 and allows the light from the light source unit 33 to pass through efficiently and emit in the direction toward the display surface 21. However, the shape of the light-transmitting member 32 when viewed facing the display surface 21 is not limited to the above-described one and can be changed as appropriate depending on the shape of the structure 30, etc. Furthermore, the lenses in the light-transmitting member 32 may be in other forms, such as a biconvex single lens, a plano-convex single lens, a biconcave single lens, a plano-concave single lens, an array lens, a meniscus single lens, an aspherical lens, or a cylindrical lens.

[0034] The light source unit 33 shown in FIGS. 2 to 5 has a plurality of light-emitting units including light-emitting unit 330-1, light-emitting unit 330-2, and light-emitting unit 330-3. The light-emitting unit 330-1, light-emitting unit 330-2, and light-emitting unit 330-3 are arranged side by side in a direction along the first side unit 324. The lenses in the light-transmitting member 32 have a plurality of lens units including lens unit 320-1, lens unit 320-2, and lens unit 320-3 corresponding to the light-emitting unit 330-1, light-emitting unit 330-2, and light-emitting unit 330-3, respectively. The lens unit 320-1 mainly transmits light from the light-emitting unit 330-1. The lens unit 320-2 mainly transmits light from the light-emitting unit 330-2. The lens unit 320-3 mainly transmits light from the light-emitting unit 330-3. Light transmitted through lens unit 320-1, lens unit 320-2, and lens unit 320-3 is emitted in the direction toward display surface 21. In the example shown in FIGS. 3 and 5, the optical axis of each lens unit is arranged to overlap the center of the corresponding light-emitting unit in a top view. That is, optical axis Ca of lens unit 320-1 overlaps center Pa of light-emitting unit 330-1. Optical axis Cb of lens unit 320-2 overlaps center Pb of light-emitting unit 330-2. Optical axis Cc of lens unit 320-3 overlaps center Pc of light-emitting unit 330-3. In image display device 100, by emitting light from the multiple light-emitting units in light source unit 33 through the corresponding lenses, the light distribution of the light emitted from each light-emitting unit can be controlled, and the amount of light emitted from light-transmissive member 32 can be increased. This allows the imaging device to capture images using bright illumination light and obtain high-quality captured images.

[0035] The light-transmitting member 32 is made of at least one of a resin material such as polycarbonate resin, acrylic resin, silicone resin, and epoxy resin, which is translucent to the light emitted from the light source unit 33, and a glass material.

[0036] When both the structure 30 and the light-transmitting member 32 are made of a resin material, the light-transmitting member 32 can be formed integrally with the structure 30 by, for example, two-color molding. On the other hand, when the structure 30 is made of a metal material and the light-transmitting member 32 is made of a resin material or a glass material, the light-transmitting member 32 is disposed inside an opening provided in the light-emitting surface 31 of the structure 30 when viewed facing the display surface 21, and is fixed to the structure 30 by an adhesive member or the like. Alternatively, the light-transmitting member 32 may be fixed so as to fit tightly inside the opening provided in the light-emitting surface 31 of the structure 30. In this way, the light-emitting surface 321 of the light-transmitting member 32 is disposed on the light-emitting surface 31 of the structure 30.

[0037] (Configuration of light-emitting unit 330-1) The configuration of the light-emitting section 330-1 included in the light source section 33 will be described in detail with reference to Fig. 6. Fig. 6 is a schematic cross-sectional view including a normal N1 of the light-emitting surface 331-1 of the light-emitting section 330-1 included in the light source section 33 of the image display device 100. In this embodiment, the light-emitting section 330-1, the light-emitting section 330-2, and the light-emitting section 330-3 included in the light source section 33 all have the same configuration. Here, the light-emitting section 330-1 will be described as a representative. Note that the light-emitting section 330-1, the light-emitting section 330-2, and the light-emitting section 330-3 included in the light source section 33 may each have a partial configuration that is different from each other.

[0038] 6, the light-emitting unit 330-1 includes a light-emitting element 332, a wavelength conversion member 334 provided on the light-emitting element 332, and a covering member 335 that covers the side surfaces of the light-emitting element 332 and the wavelength conversion member 334. With this configuration, the light-emitting unit 330-1 can emit mixed light of light from the light-emitting element 332 and light whose wavelength has been converted by the wavelength conversion member 334. In the light-emitting unit 330-1, the combination of the light-emitting element 332 and the wavelength conversion member 334 can increase the degree of freedom in the color of the light emitted from the light-emitting unit 330-1. Furthermore, by providing the covering member 335 in the light-emitting unit 330-1, it is possible to reduce light leaking from the light-emitting unit 330-1 and the covering member 335, and to increase the light extraction efficiency of the light-emitting unit 330-1.

[0039] In the example shown in FIG. 6, light emitting section 330-1 has at least a pair of positive and negative electrodes 333 on the surface opposite to light emitting surface 331-1 of light emitting element 332 (ie, the lower surface).

[0040] The light emitting element 332 includes various semiconductors such as III-V group compound semiconductors and II-VI group compound semiconductors. X Al Y Ga 1-X-Y It is preferable to use a nitride semiconductor such as InN (0≦X, 0≦Y, X+Y≦1), and InN, AlN, GaN, InGaN, AlGaN, InGaAlN, etc. can also be used. The light emitting element 332 is, for example, an LED (Light Emitting Diode) or an LD (Laser Diode). From the viewpoints of luminous efficiency and excitation of the wavelength conversion substance, the emission peak wavelength of the light emitting element 332 is preferably 400 nm or more and 530 nm or less, more preferably 420 nm or more and 490 nm or less, and even more preferably 450 nm or more and 475 nm or less.

[0041] The wavelength conversion member 334 is, for example, a substantially rectangular member when viewed from above. The wavelength conversion member 334 is provided to cover the upper surface of the light-emitting element 332. The wavelength conversion member 334 contains a wavelength conversion substance that converts the wavelength of at least a portion of the light from the light-emitting element 332. The wavelength conversion member 334 can be formed using an inorganic material such as a light-transmitting resin material, ceramics, or glass. Examples of resin materials that can be used include thermosetting resins such as silicone resin, silicone-modified resin, epoxy resin, epoxy-modified resin, and phenolic resin. Silicone resin or its modified resin, which has excellent light resistance and heat resistance, is particularly suitable. Note that the light-transmitting property here preferably means that 60% or more of the light from the light-emitting element 332 is transmitted through the material. The wavelength conversion member 334 can be formed using a thermoplastic resin such as a polycarbonate resin, an acrylic resin, a methylpentene resin, or a polynorbornene resin. Furthermore, the wavelength conversion member 334 may contain a light-reflecting substance, as described below, in addition to the above resins. For example, the wavelength conversion member 334 may be a resin material, ceramic, glass, or the like containing a wavelength conversion substance, a sintered body of a wavelength conversion substance, etc. Furthermore, the wavelength conversion member 334 may be a multilayer member in which a resin layer is arranged on the ±Z side surfaces of a molded body of resin, ceramic, glass, or the like.

[0042] The wavelength conversion material contained in the wavelength conversion member 334 is, for example, an yttrium-aluminum-garnet phosphor (e.g., (Y,Gd)3(Al,Ga)5O 12 :Ce), lutetium aluminum garnet phosphors (e.g., Lu3(Al,Ga)5O 12 :Ce), terbium aluminum garnet phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA-based phosphors (e.g., Ca 10 (PO4)6Cl2:Eu), SAE-based phosphors (e.g., Sr4Al 14 O 25 :Eu), chlorosilicate phosphors (e.g., Ca8MgSiO 16(Cl2:Eu), silicate-based phosphors (e.g., (Ba,Sr,Ca,Mg)2SiO4:Eu), β-sialon-based phosphors (e.g., (Si,Al)3(O,N)4:Eu) or α-sialon-based phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu), etc., oxynitride-based phosphors, LSN-based phosphors (e.g., (La,Y)3Si6N 11 :Ce), BSESN-based phosphors (e.g., (Ba,Sr)2Si5N8:Eu), SLA-based phosphors (e.g., SrLiAl3N4:Eu), CASN-based phosphors (e.g., CaAlSiN3:Eu) or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN3:Eu), etc., nitride-based phosphors, KSF-based phosphors (e.g., K2SiF6:Mn), KSAF-based phosphors (e.g., K2(Si 1-x Al x )F 6-x :Mn where x satisfies 0 < x < 1), or fluoride-based phosphors such as MGF-based phosphors (e.g., 3.5MgO·0.5MgF2·GeO2:Mn), quantum dots having a perovskite structure (e.g., (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I)3 where FA and MA represent formamidinium and methylammonium, respectively), II-VI group quantum dots (e.g., CdSe), III-V group quantum dots (e.g., InP), or quantum dots having a chalcopyrite structure (e.g., (Ag,Cu)(In,Ga)(S,Se)2), etc. can be used. The wavelength conversion material described above is in the form of particles. Also, one of these wavelength conversion materials can be used alone, or two or more of these wavelength conversion materials can be used in combination.

[0043] In the light emitting unit 330-1, a blue LED is used as the light emitting element 332, and the wavelength conversion member 334 contains a wavelength conversion material that wavelength-converts the light emitted from the light emitting element 332 to yellow, thereby emitting white light. As the light reflective material contained in the wavelength conversion member 334, for example, titanium oxide, barium titanate, aluminum oxide, silicon oxide, etc. can be used.

[0044] The covering member 335 is a member that covers the side surfaces of the light-emitting element 332 and the wavelength conversion member 334. The covering member 335 directly or indirectly covers the side surfaces of the light-emitting element 332 and the wavelength conversion member 334. The upper surface of the wavelength conversion member 334 is exposed from the covering member 335 and is the light-emitting surface 331-1 of the light-emitting unit 330-1. The covering member 335 is preferably made of a member with high light reflectivity to improve light extraction efficiency. For example, the covering member 335 can be made of an organic material such as a resin containing a light-reflecting substance such as a white pigment. Alternatively, the covering member 335 may be a light-reflecting member made of an inorganic material including, for example, boron nitride or alkali metal silicate. In this case, the covering member 335 may further contain titanium oxide or zirconium oxide.

[0045] Examples of light-reflective materials include titanium oxide, zinc oxide, magnesium oxide, magnesium carbonate, magnesium hydroxide, calcium carbonate, calcium hydroxide, calcium silicate, magnesium silicate, barium titanate, barium sulfate, aluminum hydroxide, aluminum oxide, zirconium oxide, and silicon oxide. It is preferable to use one of these materials alone or two or more of these materials in combination. Furthermore, it is preferable to use a resin material whose main component is a thermosetting resin, such as epoxy resin, epoxy-modified resin, silicone resin, silicone-modified resin, or phenolic resin. The covering member 335 may be made of a material that is translucent or absorbent to visible light, as needed. Examples of absorbent materials include carbon black.

[0046] The light-emitting unit 330-1 is electrically connected to wiring 352 provided on the substrate 35. The substrate 35 has wiring 352 arranged on its surface. The substrate 35 may have wiring 352 internally. The light-emitting unit 330-1 and the substrate 35 are electrically connected by connecting the wiring 352 of the substrate 35 to at least a pair of positive and negative electrodes 333 of the light-emitting unit 330-1 via conductive members 353. The configuration, size, etc. of the wiring 352 of the substrate 35 are set according to the configuration and size of the electrodes 333 of the light-emitting unit 330-1.

[0047] The wiring 352 can be made of at least one of copper, iron, nickel, tungsten, chromium, aluminum, silver, gold, titanium, palladium, rhodium, alloys thereof, etc. Furthermore, a layer of silver, platinum, aluminum, rhodium, gold, alloys thereof, etc. may be provided on the surface of the wiring 352 from the viewpoint of wettability and light reflectivity of the conductive member 353.

[0048] [Variations] Various modified examples of the image display device according to the embodiment will be described below. Note that the same names and symbols as those in the already described embodiment of the present invention indicate the same or similar components or configurations, and detailed explanations will be omitted as appropriate. This also applies to the modified examples described below. Furthermore, the smartphone 200 shown in FIG. 1 can include image display devices according to the modified examples described below.

[0049] <First Modification> 7 to 9B, a structure included in an image display device according to one embodiment of the first modification will be described. FIG. 7 is a schematic diagram of a structure 30 included in an image display device according to one embodiment of the first modification, viewed from the display surface 21. FIG. 8 is a schematic diagram of a structure 30 included in an image display device according to one embodiment of the first modification, viewed from the -X side (in other words, viewed from the side where the display unit 20 is located). FIG. 9 is a schematic diagram of a structure 30 included in an image display device according to one embodiment of the first modification, viewed from the opposite side to the side where the display unit 20 is located. In FIG. 9, the housing 10 is omitted. FIG. 9A is a schematic cross-sectional view taken along line IX-IX in FIG. 7, showing a cross section passing through the first side portion 324, the second side portion 325, and the center C1 of the light-transmitting member 32. FIG. 9B is a schematic diagram of a structure 30 included in an image display device according to one embodiment of the first modification, viewed from the display surface. The center C1 is the intersection of the center of the maximum width of the light-transmitting member 32 in the X direction and the center of the maximum width of the light-transmitting member 32 in the Y direction when viewed from above.

[0050] In this modification, the main difference from the first embodiment is the configuration of the light-transmitting member 32.

[0051] In this modification, the light-transmitting member 32 has a first side portion 324 located in a direction away from the housing 10 when viewed facing the display surface 21, and a second side portion 325 located closer to the housing 10 than the first side portion 324. The light-transmitting member 32 has, on the incident surface 322, a plurality of convex portions 323 including a first portion 326 along the first side portion 324. The plurality of convex portions 323 are arranged in a direction along the normal N2 of the first side portion 324 when viewed facing the display surface 21, and are arranged closer to the first side portion 324 than the second side portion 325 in a cross section passing through the first side portion 324, the second side portion 325, and a center C1 of the light-transmitting member 32 when viewed facing the display surface 21. In this modification, as shown in FIG. 7 , the outer shape of the light-transmitting member 32 in a top view has a shape obtained by dividing a substantially elliptical shape into two in the longitudinal direction.

[0052] The light source unit 33 shown in FIGS. 7 to 9A includes one light-emitting unit 330. In this modification, as shown in FIGS. 7 and 9A, light from the light source unit 33 is guided by the first portions 326 of the multiple convex portions 323 so as to approach the second side portion 325 when viewed facing the display surface 21. The first portions 326 of the multiple convex portions 323 can impart a deflection action, for example, by a linear Fresnel lens, to the light from the light source unit 33 so as to approach the second side portion 325. As a result, in this modification, when viewed facing the display surface 21, it is possible to reduce the spread of light emitted in the direction toward which the display surface 21 faces so as to move away from the second side portion 325 (for example, toward the +X direction), thereby increasing the efficiency with which the light emitted in the direction toward which the display surface 21 faces illuminates the operator taking a selfie.

[0053] In this modification, the protrusion 323 includes a first portion 326 and a second portion 327. When viewed facing the display surface 21, the second portion 327 is continuous with the end of the first portion 326 and extends in the direction from the first side portion 324 to the second side portion 325. In the example shown in Fig. 7, the direction from the first side portion 324 to the second side portion 325 is the -X direction.

[0054] In this modification, when viewed facing the display surface 21, the convex portion 323 is continuous with an end of the first portion 326 along the first side portion 324 and includes a second portion 327 extending in a direction from the first side portion 324 toward the second side portion 325. With this configuration, of the light incident on the light-transmissive member 32 from the light source unit 33, when viewed facing the display surface 21, for example, light traveling along the first side portion 324 to the +Y side can be guided by the second portion 327 to the center (−Y side) of the display surface 21. Light traveling along the first side portion 324 to the −Y side can be guided by the second portion 327 to the center (+Y side) of the display surface 21. As a result, in this modified example, the light distribution of the light emitted from the translucent member 32, traveling along the first side portion 324 to the +Y side and the -Y side, is controlled so that it is directed toward the opposite side (-Y side and +Y side) from the center of the display surface 21, thereby increasing the irradiation efficiency of the light emitted from the translucent member 32.

[0055] 9A , in a cross section passing through the first side portion 324, the second side portion 325, and the center C1 of the light-transmitting member 32, the light-transmitting member 32 has, on the incident surface 322, a plurality of convex portions 323 located on the first side portion 324 side and a flat portion 328 adjacent to the plurality of convex portions 323 on the second side portion 325 side. When viewed facing the display surface 21, the plurality of convex portions 323 include one or more first convex portions 323a located closer to the first side portion 324 than the center C2 of the light source unit 33, and one or more second convex portions 323b located closer to the second side portion 325 than the center C2 of the light source unit 33. The first convex portions 323a reflect light emitted from the center C2 of the light source unit 33. The second convex portions 323b refract light emitted from the center of the light source unit 33. The flat portion 328 transmits the light emitted from the center C2 of the light source unit 33 without refracting the light.

[0056] 9A, some of the light emitted from the light source unit 33 is indicated by arrows as light rays J1 to J5. In FIG. 9A, light ray J1 represents one of the multiple light rays that is emitted from the center C2 of the light source unit 33 and incident on the surface of the first side portion 324 side (+X side) of the convex portion 323 included in the first convex portion 323a. Light ray J2 represents one of the multiple light rays that is emitted from the center C2 of the light source unit 33 and incident on the surface of the first side portion 324 side (+X side) of the convex portion 323 included in the first convex portion 323a. Light ray J3 represents one of the multiple light rays that is emitted from the center C2 of the light source unit 33 and incident on the surface of the first side portion 324 side (+X side) of the convex portion 323 included in the second convex portion 323b. The ray J4 represents one of the multiple rays that are emitted from the center C2 of the light source unit 33 and incident on the surface on the first side portion 324 side (+X side) of the convex portion 323 included in the second convex portion 323b. The ray J5 represents one of the multiple rays that are emitted from the center C2 of the light source unit 33 and incident on the flat portion 328.

[0057] 9A, the first convex portion 323a is located closer to the first side portion 324 than the center C2 of the light source portion 33. Here, being located closer to the first side portion 324 than the center C2 of the light source portion 33 means that, in one cross section, the apex of any convex portion 323 is located closer to the first side portion 324 than the center C2 of the light source portion 33. The light ray J1 is incident on the surface of one convex portion 323 included in the first convex portion 323a on the first side portion 324 side (+X side) from the second side portion 325 side (-X side). Similarly, the light ray J2 is incident on the surface of one convex portion 323 included in the first convex portion 323a on the first side portion 324 side (+X side) from the second side portion 325 side (-X side). The surface on the first side portion 324 side (+X side) of each convex portion 323 included in the first convex portion 323a can reflect each of the incident light rays J1 and J2 in a desired direction, such as toward the center side (-X side) of the display surface 21.

[0058] The second convex portion 323b is located closer to the second side portion 325 than the center C2 of the light source portion 33. Here, being located closer to the second side portion 325 than the center C2 of the light source portion 33 means that, in one cross section, the apex of any convex portion 323 is located closer to the second side portion 325 than the center C2 of the light source portion 33. The light ray J3 is incident from the first side portion 324 side (+X side) on the surface of one convex portion 323 included in the second convex portion 323b on the first side portion 324 side (+X side). Similarly, the light ray J4 is incident from the first side portion 324 side (+X side) on the surface of the convex portion 323 included in the second convex portion 323b on the first side portion 324 side (+X side). The surface on the first side 324 side (+X side) of each convex portion 323 included in the second convex portion 323b can refract each of the incident light rays J3 and J4 in a desired direction, such as toward the center side (-X side) of the display surface 21.

[0059] The surface of the flat portion 328 is inclined so that the normal N3 of the flat portion 328 moves toward the center (-X side) of the display surface 21 as it moves toward the +Z side. Light ray J5 is incident on the surface of the flat portion 328 almost perpendicularly. The surface of the flat portion 328 transmits the incident light ray J5 without refracting it. This allows light ray J5 incident on the surface of the flat portion 328 to travel almost straight in a desired direction, such as toward the center of the display surface 21.

[0060] Here, multiple light rays emitted from the center C2 of the light source unit 33 may be incident on different positions on the incident surface 322 of the light-transmitting member 32. Optical effects that deflect light incident on the incident surface 322 toward the center of the display surface 21 include reflecting the incident light and refracting the incident light. If the same deflection effect is applied to light incident on the incident surface 322 regardless of its position relative to the center C2 of the light source unit 33, it may be difficult to deflect the light incident on the incident surface 322 in the desired direction. For example, since refraction has a limit on the refraction angle according to Snell's law, if the refraction angle limit is exceeded, the light-transmitting member 32 cannot deflect the incident light in the desired direction. Therefore, if an attempt is made to apply the same deflection effect by refraction to light emitted from the center C2 of the light source unit 33 and incident on the incident surface 322 regardless of its position relative to the center C2 of the light source unit 33, it may be difficult to design the light-transmitting member 32 to guide the incident light in the desired direction. Difficulties in designing the light-transmitting member 32 can make it difficult to guide light incident on the light-transmitting member 32 in the desired direction. Furthermore, if multiple convex portions 323 are provided over the entire surface of the incident surface 322, the presence of the convex portions 323 can make it difficult to guide light in the desired direction in areas where light is incident almost perpendicularly to the surface. As a result of not being able to guide light in the desired direction, the number of incident light rays per unit area of ​​the light irradiated from the image display device in the direction toward the display surface 21 can vary on the irradiation surface, potentially resulting in variations in illuminance.

[0061] In this modification, the light-transmitting member 32 reflects light emitted from the center of the light source unit 33 and incident on the incident surface 322 at the first convex portion 323a and refracts it at the second convex portion 323b depending on the position of the light source unit 33 relative to the center C2. This allows the light-transmitting member 32 to deflect light incident on the incident surface 322 in a desired direction, such as toward the center of the display surface 21. Furthermore, in a region on the second side portion 325 side where light is incident approximately perpendicular to the surface, the light-transmitting member 32 can cause the light emitted from the center of the light source unit 33 to travel approximately straight through the flat portion 328. This allows the light-transmitting member 32 to guide the light incident on the incident surface 322 in a desired direction. As a result, in this modification, the density of the number of incident light rays per unit area of ​​light irradiated from the image display device in the direction toward the display surface 21 can be reduced on the irradiation surface, thereby reducing illuminance variation.

[0062] 9B , the light-transmitting member 32 may have a plurality of convex portions 323 each having a first portion 326 extending in a direction along the first side portion 324. This allows a portion of the light incident on the light-transmitting member 32 from the light source unit 33 to be guided to the ±Y side along the first side portion 324 when viewed from the perspective of the display surface 21. Therefore, when viewed from the perspective of the display surface 21, the light spreads to the +Y side along the first side portion 324, allowing the operator taking a selfie to be illuminated at a wide illumination angle.

[0063] <Second Modification> The structural body provided in the image display device according to the second modified example will be described with reference to Fig. 10. Fig. 10 is a schematic cross-sectional view of a structural body 30 provided in the image display device according to the second modified example.

[0064] This modification differs from the first embodiment described above mainly in that the substrate 35 is integrated with the structure 30.

[0065] In the example shown in FIG. 10 , inside the structure 30 having the space R, the substrate 35 is formed integrally with the structure 30 without using an adhesive member 37 so as to form part of the inner surface 301. For example, when molding the structure 30 made of a resin material using a mold, the substrate 35 is placed in the mold, the mold is closed, the resin material is injected into the mold, the resin material is cured, and the mold is opened. In this way, the structure 30 integrated with the substrate 35 can be obtained. This configuration eliminates the need for the step of bonding the substrate 35 to the inner surface 301 of the structure 30 using the adhesive member 37 in the first embodiment described above, and therefore this modification makes it easy to manufacture an image display device.

[0066] <Third Modification> A structural body provided in the image display device according to the third modified example will be described with reference to Fig. 11. Fig. 11 is a schematic cross-sectional view of a structural body 30 provided in the image display device according to the third modified example.

[0067] This modification differs from the first embodiment described above mainly in that the structure 30 is provided with wiring 36.

[0068] 11, wiring 36 is provided on at least a portion of the inner surface 301 of the structure 30 having the space R. The light source unit 33 is mounted on the wiring 36 provided on the inner surface 301 of the structure 30. This configuration eliminates the need for the step of joining the substrate 35 to the inner surface of the structure 30 with the adhesive member 37 in the first embodiment described above, and therefore, in this modification, the image display device can be easily manufactured.

[0069] <Fourth Modification> A structural body provided in an image display device according to a fourth modified example will be described with reference to Fig. 12 and Fig. 13. Fig. 12 is a schematic diagram of structural body 30 provided in an image display device according to the fourth modified example, viewed from the side facing display surface 21. Fig. 13 is a schematic cross-sectional view taken along line XIII-XIII in Fig. 12.

[0070] In this modification, the light source unit 33 includes a light emitting module 340. The light emitting module 340 has a light emitting unit 330, a lens 341 located above the light emitting unit 330, and a light blocking member 342 that supports the lens 341. The side surface of the light emitting unit 330 is covered by the light blocking member 342. This modification mainly differs from the first embodiment described above in the above points.

[0071] In the light-emitting module 340, the optical axis Cd of the lens 341 overlaps with the center Pd of the light-emitting unit 330 when viewed from above. In this modification, the light source unit 33 includes the light-emitting module 340 including the lens 341 and the light-emitting unit 330 aligned with the lens 341, which makes it easier to manufacture the image display device.

[0072] 12 and 13 includes a plurality of light emitting modules 340, including light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3. Light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 are arranged side by side in a direction along the first side portion 324. Light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 have the same configuration. In the following description, light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 may be collectively referred to as light emitting module 340. Light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 may have at least a partial configuration that is different from one another.

[0073] 12 and 13 is disposed inside the structure 30, and is disposed on a substrate 35 bonded to the inner surface 301 of the structure 30 by an adhesive member 37. The light-emitting module 340 shown in FIGS. 12 and 13 further includes a mounting member 343 on which the light-emitting unit 330 is placed. The light-emitting module 340 is disposed on the substrate 35 so that the lower surface of the mounting member 343 faces the upper surface of the substrate 35. However, the light-emitting module 340 does not necessarily have to include the mounting member 343, and the light-emitting unit 330 may be disposed directly on the substrate 35.

[0074] 12 and 13, a light-transmitting member 32 is disposed above light-emitting modules 340 disposed on a substrate 35. An emission surface 321 of the light-transmitting member 32 is disposed on the light-emitting surface 31. The light-transmitting member 32 shown in FIGS. 12 and 13 is a parallel plate in which the emission surface 321 and the incidence surface 322 are each substantially flat and substantially parallel to each other. The light-transmitting member 32 transmits light from each of the plurality of light-emitting modules 340.

[0075] 12 and 13 includes a first side portion 324 and a second side portion 325 that is parallel to and has the same length as the first side portion 324. In a top view (when viewed facing the display surface 21), the outer shape of the light-transmitting member 32 is a shape whose longitudinal direction is along the first side portion 324. Furthermore, in a top view, both ends of each of the first side portion 324 and the second side portion 325 have an arc-shaped curve connecting one first side portion 324 and the second side portion 325, and an arc-shaped curve connecting the other first side portion 324 and the second side portion 325. When viewed facing the display surface 21, the light-transmitting member 32 has a shape whose longitudinal direction is along the first side portion 324, so that the light from the light source unit 33 including a plurality of light-emitting modules 340 arranged in a direction along the first side portion 324 can be transmitted and emitted in the direction toward the display surface 21. Furthermore, when viewed facing the display surface 21, the first side portion 324 and the second side portion 325 have curved ends, so that the light-transmitting member 32 reduces vignetting of light from the light source unit 33 and can efficiently transmit the light from the light source unit 33. However, the shape of the light-transmitting member 32 when viewed facing the display surface 21 is not limited to the above-described one, and can be changed as appropriate depending on the shape of the structure 30, etc.

[0076] 13 is a Fresnel lens having a plurality of concentric circular or concentric elliptical convex portions on the incident surface side. However, the lens 341 is not limited to a Fresnel lens, and may be in other forms such as a biconvex single lens, a plano-convex single lens, a biconcave single lens, a plano-concave single lens, an array lens, a meniscus single lens, an aspherical lens, or a cylindrical lens.

[0077] <Fifth Modification> A structural body provided in an image display device according to a fifth modified example will be described with reference to Fig. 14 and Fig. 15. Fig. 14 is a schematic diagram of structural body 30 provided in an image display device according to a fifth modified example, viewed from the side facing display surface 21. Fig. 15 is a schematic cross-sectional view taken along line XV-XV in Fig. 14.

[0078] This modification is different from the fourth modification described above mainly in that the light emitting surface 344 of the lens 341 included in the light emitting module 340 is arranged on the light emitting surface 31. This modification also provides the same effects as the fourth modification described above.

[0079] 14 and 15 has a plurality of light emitting modules 340, including light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3. Light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 are arranged side by side in a direction along first side portion 324. In this modification, light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 have similar configurations. Note that light emitting module 340-1, light emitting module 340-2, and light emitting module 340-3 may have at least partial configurations that differ from one another.

[0080] In this modification, a part of a light-emitting module 340 is arranged in a region of the light-emitting surface 31 of the structure 30 where the light-transmitting member 32 is arranged. In detail, as shown in Fig. 15 , an exit surface 344 of a lens 341 provided in the light-emitting module 340 and a part of a light-blocking member 342 supporting the lens 341 are arranged on the light-emitting surface 31. That is, in this modification, the light-transmitting member 32 is the lens 341, and the lens 341 is arranged inside the through-hole of the structure 30 when viewed facing the display surface 21. Light emitted from the light-emitting unit 330 passes through the lens 341 and is emitted in the direction in which the display surface 21 faces.

[0081] The light-emitting module 340 is disposed not only inside the through-hole of the structure 30 but also inside the structure 30, and is disposed on a substrate 35 bonded to the inner surface 301 of the structure 30 with an adhesive member 37. The light-emitting module 340 shown in FIGS. 14 and 15 further includes a mounting member 343 on which the light-emitting unit 330 is mounted. The light-emitting module 340 is disposed on the substrate 35 so that the lower surface of the mounting member 343 faces the upper surface of the substrate 35. In this embodiment, the mounting member 343 includes wiring for electrically connecting the light-emitting unit 330 and wiring 352 included in the substrate 35. However, the mounting member 343 does not necessarily have to include wiring. The light-emitting module 340 does not necessarily have to include the mounting member 343, and the light-emitting unit 330 may be disposed directly on the substrate 35.

[0082] In this embodiment, the upper surface of the light-blocking member 342 is flush with the outer surface 302 (light-emitting surface 31) of the structure 30, i.e., is a part of the light-emitting surface 31. Therefore, it is preferable that the light-blocking member 342 and the outer surface 302 of the structure 30 are substantially the same color. When the light-blocking member 342 and the outer surface 302 (especially the light-emitting surface 31) of the structure 30 are substantially the same color, the appearance of the structure 30 when viewed from the outside is improved. For example, if the light-emitting surface 31 of the structure 30 is white, the light-blocking member 342 is made of a resin containing a light-reflecting material such as a white pigment. Furthermore, for example, if the light-emitting surface 31 of the structure 30 is black, the light-blocking member 342 is made of a resin containing a light-absorbing material. The color of the light-blocking member 342 is not limited to the above, and the color of the light-blocking member 342 and the color of the outer surface 302 of the structure 30 may be different.

[0083] 14 and 15 include three first side portions 324 and three second side portions 325 that are parallel to each other and have the same length, respectively corresponding to the three first side portions 324. When viewed from above (when viewed facing the display surface 21), the outer shape of the light-transmitting member 32 is, for example, a square. When viewed facing the display surface 21, the light-transmitting member 32 can transmit light from the light source unit 33 that includes a plurality of light-emitting modules 340 and emit the light in the direction in which the display surface 21 faces. However, the shape of the light-transmitting member 32 when viewed facing the display surface 21 is not limited to the above-described one and can be changed as appropriate depending on the shape of the structure 30, etc.

[0084] <Sixth Modification> The structure included in the image display device according to the sixth modification will be described with reference to Fig. 16 and Fig. 17. Fig. 16 is a schematic diagram of structure 30 included in the image display device according to the sixth modification, viewed from the side facing display surface 21. Fig. 17 is a schematic diagram of structure 30 included in the image display device according to the sixth modification, viewed from the -X side (in other words, viewed from the side where display unit 20 is located).

[0085] This modification is different from the first embodiment described above mainly in that the light source unit 33 has a plurality of light-emitting units, and the lens 341 includes one lens unit 320 corresponding to the plurality of light-emitting units. The light source unit 33 has a plurality of light-emitting units, namely, light-emitting unit 330-1, light-emitting unit 330-2, and light-emitting unit 330-3.

[0086] 16 and 17, the light-emitting units 330-1, 330-2, and 330-3 included in the light source unit 33 are arranged side by side in a direction along the first side unit 324. One lens unit 320 included in the lens 341 corresponds to a plurality of light-emitting units (light-emitting units 330-1, 330-2, and 330-3). The light-emitting units 330-1, 330-2, and 330-3 are each arranged facing one lens unit 320. In this modified example, the same effects as those of the first embodiment described above can be obtained. Furthermore, since a plurality of light-emitting units are arranged for one lens unit, the amount of light emitted from one lens unit can be increased.

[0087] Although the preferred embodiments have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0088] All ordinal numbers, quantitative numbers, and other figures used in the description of the embodiments are provided as examples to specifically explain the technology of the present disclosure, and the present disclosure is not limited to the illustrated figures. Furthermore, the connection relationships between components are provided as examples to specifically explain the technology of the present disclosure, and do not limit the connection relationships that realize the functions of the present disclosure.

[0089] The image display device of the present disclosure allows a light source unit to be arranged in an existing part, and therefore can be suitably used in information terminals such as smartphones, tablets, notebook PCs (Personal Computers), etc. However, the image display device of the present disclosure is not limited to these uses.

[0090] Aspects of the present disclosure are, for example, as follows. <Item 1> An image display device including: a housing having an inner surface, an outer surface located opposite the inner surface, and an opening defined by the inner surface; a display unit arranged within the opening and having a display surface; and a structure having a light-emitting surface and at least a portion of which protrudes from the outer surface when viewed facing the display surface, wherein the structure includes: a light-transmitting member having an exit surface and an entrance surface, the exit surface being arranged on the light-emitting surface; and a light source unit that emits light to the entrance surface of the light-transmitting member and is capable of emitting light via the light-transmitting member in a direction in which the display surface is facing. <Item 2> The image display device according to <Item 1>, wherein the structure is included in an operation button of the image display device. <Item 3> The image display device according to <Item 1> or <Item 2>, wherein the light-transmitting member is a lens. <Item 4> The image display device according to <Item 3>, wherein the lens has a plurality of concentric circular or concentric elliptical convex portions on the incident surface side. <Item 5> The image display device according to <Item 3> or <Item 4>, wherein the exit surface of the light-transmitting member has a first side portion located in a direction away from the housing when viewed facing the display surface, and a second side portion located closer to the housing than the first side portion, and the light-transmitting member has a plurality of convex portions on the entrance surface, the convex portions including a first portion along the first side portion, and the plurality of convex portions are arranged in a direction along a normal to the first side portion when viewed facing the display surface, and are arranged closer to the first side portion than the second side portion in a cross section passing through a center of the first side portion, the second side portion, and the light-transmitting member when viewed facing the display surface. <Item 6> The image display device according to <Item 5>, wherein the convex portion further includes a second portion that is continuous with an end of the first portion when viewed facing the display surface and extends in a direction from the first side portion toward the second side portion. <Item 7> In the cross section, the light-transmitting member has, on the incident surface, a plurality of the convex portions located on the first side portion side and a flat portion adjacent to the plurality of the convex portions on the second side portion side, the plurality of the convex portions having one or more first convex portions located on the first side portion side of a center of the light source unit and one or more second convex portions located on the second side portion side of the center of the light source unit when viewed facing the display surface, the first convex portions reflect light emitted from the centers of the light source units, and the second convex portions refract the light emitted from the centers of the light source units, In the image display device according to <Item 5> or <Item 6>, the flat section transmits light emitted from the center of the light source section without refracting the light. <Item 8> The image display device according to any one of <Item 3> to <Item 7>, wherein the light source unit has a plurality of light-emitting units, and the lens has a plurality of lens units corresponding to each of the plurality of light-emitting units. <Item 9> The image display device according to any one of <Item 3> to <Item 8>, wherein the light source unit has a plurality of light-emitting units, and the lens includes one lens unit corresponding to the plurality of light-emitting units. <Item 10> The image display device according to any one of <Item 1> to <Item 9>, wherein the light source unit includes a light-emitting unit, and the light-emitting unit has a light-emitting element, a wavelength conversion member provided on the light-emitting element, and a covering member that covers each of a side surface of the light-emitting element and a side surface of the wavelength conversion member. <Item 11> The image display device according to any one of <Item 1> to <Item 10>, wherein the light source unit includes a light-emitting module, the light-emitting module has a light-emitting unit, a lens located above the light-emitting unit, and a light-shielding member that supports the lens, and a side surface of the light-emitting unit is covered by the light-shielding member. <Item 12> A smartphone including the image display device according to any one of <Item 1> to <Item 11>. [Explanation of symbols]

[0091] 10. Cabinet 11 Inner surface 12 External surface 13 Opening 20 Display section 21 Display surface 22 Shooting button 30 Structure 301 Inner surface 302 External surface 31 Light-emitting surface 32 Translucent member 320, 320-1, 320-2, 320-3 lens part 321 Exit Surface 322 Incidence plane 323 Convex 323a First convex part 323b Second convex part 328 Flat area 324 First Side 325 Second Side 326 Part 1 327 Part 2 33 Light source section 330, 330-1, 330-2, 330-3 Light-emitting part 331-1 Light-emitting surface 332 Light-emitting element 333 Electrode 334 Wavelength conversion material 335 Covering materials 340, 340-1, 340-2, 340-3 Light-emitting modules 341 Lens 342 Light-shielding material 343 Mounting member 344 Exit Surface 34 Support part 35 PCB 352 Wiring 353 Conductive materials 36 Wiring 37 Adhesive materials 40 Imaging device 50 Tsuba 100 Image display device 200 smartphones N1 Normal to the light-emitting surface N2 Normal to the first side C1 Center of the transparent material C2 Center of the light source Ca, Cb, Cc, Cd Optical axis of lens Pa, Pb, Pc, Pd Center of the light-emitting area R space

Claims

1. a housing having an inner surface, an outer surface opposite the inner surface, and an opening defined by the inner surface; a display unit disposed within the opening and having a display surface; a structure having a light-emitting surface and at least a portion of which protrudes from the outer surface when viewed from the display surface, The structure is a light-transmitting member having an exit surface and an entrance surface, the exit surface being disposed on the light-emitting surface; a light source unit that emits light toward the incident surface of the light-transmitting member and is capable of emitting light through the light-transmitting member in a direction toward which the display screen faces.

2. The image display device according to claim 1 , wherein the structure is included in an operation button of the image display device.

3. The image display device according to claim 1 , wherein the light-transmitting member is a lens.

4. The image display device according to claim 3 , wherein the lens has a plurality of concentric circular or concentric elliptical convex portions on the incident surface side.

5. the translucent member has, when viewed facing the display surface, a first side portion located in a direction away from the housing and a second side portion located closer to the housing than the first side portion; the light-transmitting member has a plurality of convex portions on the incident surface, the convex portions including first portions along the first side portions; 4. The image display device according to claim 3, wherein the plurality of convex portions are arranged in a direction along a normal to the first side portion when viewed facing the display surface, and are arranged closer to the first side portion than the second side portion in a cross section passing through a center of the first side portion, the second side portion, and the translucent member when viewed facing the display surface.

6. 6. The image display device according to claim 5, wherein the convex portion further includes a second portion that is continuous with an end of the first portion when viewed facing the display surface and that extends in a direction from the first side portion toward the second side portion.

7. In the one cross section, the light-transmitting member has, on the incident surface, a plurality of the convex portions located on the first side portion side and a flat portion adjacent to the plurality of the convex portions on the second side portion side, the plurality of convex portions include one or more first convex portions located closer to the first side portion than the center of the light source portion when viewed facing the display surface, and one or more second convex portions located closer to the second side portion than the center of the light source portion, the first convex portion reflects light emitted from the center of the light source portion, the second convex portion refracts light emitted from the center of the light source portion, The image display device according to claim 5 , wherein the flat portion transmits light emitted from the center of the light source portion without refracting the light.

8. the light source unit has a plurality of light emitting units, The image display device according to claim 3 , wherein the lens includes a plurality of lens portions corresponding to the plurality of light-emitting portions, respectively.

9. the light source unit has a plurality of light emitting units, The image display device according to claim 3 , wherein the lens includes one lens portion corresponding to a plurality of the light emitting portions.

10. the light source unit includes a light emitting unit, 2. The image display device according to claim 1, wherein the light-emitting section comprises a light-emitting element, a wavelength conversion member provided on the light-emitting element, and a covering member covering each of a side surface of the light-emitting element and a side surface of the wavelength conversion member.

11. the light source unit includes a light emitting module; the light-emitting module includes a light-emitting unit, a lens located above the light-emitting unit, and a light-blocking member supporting the lens; The image display device according to claim 1 , wherein a side surface of the light-emitting portion is covered by the light-shielding member.

12. A smartphone comprising the image display device according to any one of claims 1 to 11.

Images