WO2017169047A1

WO2017169047A1 - Light emitting device, display device and lighting device

Info

Publication number: WO2017169047A1
Application number: PCT/JP2017/002718
Authority: WO
Inventors: 誠二林本; 谷野　友哉; 小林　直人
Original assignee: ソニー株式会社
Priority date: 2016-03-30
Filing date: 2017-01-26
Publication date: 2017-10-05

Abstract

Provided is a light emitting device which is capable of achieving a higher luminous efficiency. This light emitting device comprises: a first light source and a reflective layer, which are provided on a substrate; an intermediate light guide part which comprises a main body that is provided with a first recess and a first transparent member that fills the first recess and covers the first light source, and which has the light emitted from the first light source propagate therein; a light guide plate; a first adhesive member which bonds the light guide plate and the substrate with each other; and a second adhesive member which fills the space between one end of the light guide plate and a first end of the first recess, thereby bonding the light guide plate and the main body with each other.

Description

LIGHT EMITTING DEVICE, DISPLAY DEVICE, AND LIGHTING DEVICE

The present disclosure relates to a light emitting device, and a display device and a lighting device including the light emitting device.

As a backlight of a liquid crystal display device, a light emitting device having an LED (Light Emitting Diode) as a light source and a light guide plate from which light from the LED enters from an end surface and exits from a main surface is employed. For example, Patent Document 1 discloses an apparatus in which light from an LED is incident from an end face of a light valve using a reflector having a curved reflecting surface.

JP 2006-332665 A

By the way, in the backlight using the LED and the light guide plate, it is desired that more light from the LED is incident on the end face of the light guide plate and more light is emitted from the main surface of the light guide plate. .

It is desirable to provide a light emitting device that can obtain higher luminous efficiency, and a display device and a lighting device including the light emitting device.

A light emitting device as an embodiment of the present disclosure includes a substrate, a first light source, a reflective film, an intermediate light guide unit, a light guide plate, a first adhesive member, and a second adhesive member. . The first light source is provided on the substrate and emits first light. The reflective film is provided on the substrate at a position different from that of the first light source. The intermediate light guide unit includes a main body having a first recess including a first reflection curved surface facing the first light source and the reflection film in the first direction, and the first recess is filled with the first recess. A first transparent member that covers the light source, and propagates the first light emitted from the first light source along a second direction orthogonal to the first direction. The light guide plate is provided at one end between the first end of the first recess and the substrate, and provided at the one end, and the first light emitted from the first light source is an intermediate light guide. And an end face that is incident through the portion and a main surface from which the first light incident from the end face is emitted. The first adhesive member is filled between the one end portion of the light guide plate and the substrate to bond the light guide plate and the substrate. The second adhesive member is filled between one end portion of the light guide plate and the first end portion of the first recess, and bonds the light guide plate and the main body.
In addition, a display device and a lighting device as an embodiment of the present disclosure include the light emitting device.

In the light emitting device, the display device, and the lighting device as an embodiment of the present disclosure, the light source is covered with the first transparent member of the intermediate light guide unit. For this reason, the light emitted from the light source is reflected on the first reflection curved surface, then propagates in the second direction, and enters the light guide plate from the end face. Further, the light guide plate and the substrate are bonded by the first adhesive member, and the light guide plate and the main body are bonded by the second adhesive member. Therefore, for example, when the first transparent member in the intermediate light guide portion is formed by pouring a transparent resin having fluidity and then curing the transparent resin, the outflow of the transparent resin to the outside is suppressed. . As a result, the first transparent member having a highly accurate dimension is easily formed.

According to the light emitting device as an embodiment of the present disclosure, it is possible to relatively easily obtain the intermediate light guide unit including the first transparent member having a highly accurate desired dimension. Therefore, it is easy to improve the light emission efficiency and to ease the unevenness of the luminance distribution. For this reason, according to the display device using this light emitting device, it is possible to reduce power consumption while exhibiting high display performance. Moreover, according to the illuminating device using this light-emitting device, it is possible to illuminate an object with high illuminance while reducing power consumption. In addition, the effect of this indication is not limited to this, Any effect described below may be sufficient.

It is a perspective view showing the example of whole composition of a light emitting device concerning a 1st embodiment in this indication. It is a top view showing the example of whole structure of the light-emitting device shown in FIG. It is sectional drawing showing the principal part structural example of the light-emitting device shown in FIG. FIG. 5 is another cross-sectional view illustrating an exemplary configuration of a main part of the light emitting device illustrated in FIG. 1. It is a perspective view showing the example of whole structure of one member of the light-emitting device shown in FIG. It is a top view showing the example of whole composition of one member shown in Drawing 4A. It is an expansion perspective view which expands and represents the principal part of the one member shown to FIG. 4A. It is an expansion perspective view showing the example of a principal part structure of the light-emitting device shown in FIG. 14 is a perspective view illustrating an appearance of a display device according to a second embodiment of the present disclosure. FIG. FIG. 7 is an exploded perspective view of the main body shown in FIG. 6. FIG. 8 is an exploded perspective view illustrating the panel module illustrated in FIG. 7. It is a perspective view showing the external appearance of the tablet-type terminal device (application example 1) carrying the display apparatus of this indication. It is a perspective view showing the external appearance of the other tablet type terminal device (application example 1) carrying the display apparatus of this indication. It is a perspective view showing the external appearance of the 1st illuminating device provided with the light-emitting device of this indication. It is a perspective view showing the external appearance of the 2nd illuminating device provided with the light-emitting device of this indication. It is a perspective view showing the external appearance of the 3rd illuminating device provided with the light-emitting device of this indication.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The description will be given in the following order.
1. First Embodiment A light-emitting device in which one transparent member is individually covered for each light source.
2. Second embodiment (display device; liquid crystal display device)
3. 3. Application example of display device 4. Application example of lighting device Other variations

<1. First Embodiment>
[Configuration of Light Emitting Device 1]
FIG. 1 is a perspective view illustrating an example of the entire configuration of a light emitting device 1 as a first embodiment of the present disclosure. FIG. 2 is a plan view illustrating an example of the overall configuration of the light emitting device 1 illustrated in FIG. 1. 3A and 3B are cross-sectional views illustrating a part of the light-emitting device 1. In particular, FIG. 3A corresponds to a cross section taken along line IIIA-IIIA shown in FIG. 2, and FIG. 3B corresponds to a cross section taken along line IIIB-IIIB shown in FIG. 4A and 4B are a perspective view and a plan view showing an example of the overall configuration of the main body 21 (described later) of the intermediate light guide 20 in the light emitting device 1, and FIG. 4C is an enlarged view of the main part of the main body 21. FIG. 4A to 4C, only the main body 21 is indicated by a solid line, the optical sheet 50 (described later) is indicated by a broken line, and other components are omitted. FIG. 5 is an enlarged perspective view showing a main part of the light emitting device 1. In FIG. 5, the main body 21 is not shown.

The light-emitting device 1 is used, for example, as a backlight that illuminates a transmissive liquid crystal panel from behind, or as an illumination device in a room or the like. The light-emitting device 1 includes, for example, a plurality of light sources 10, an intermediate light guide unit 20, a light guide plate 30, a reflection member 40, and an optical sheet 50.

In this specification, the direction in which the optical sheet 50, the light guide plate 30, and the reflection member 40 are arranged is the Z-axis direction (front-rear direction), and the left-right direction (horizontal direction) on the surface 32 that is the widest surface of the light guide plate 30. Is the Y-axis direction, and the vertical direction on the surface 32 is the X-axis direction. In the light emitting device 1, the light emitted from each light source 10 propagates along the X direction through the intermediate light guide 20.

The light source 10 is a light source having a spread in, for example, the XY plane, and specifically includes an LED (Light Emitting Diode). The light source 10 is mounted, for example, on the surface of the substrate 11 extending along the XY plane, and is disposed in the vicinity of the end surface 31 (see FIGS. 2, 3A, 3B, and 5) of the light guide plate 30. A plurality of light sources 10 are provided, for example, so as to line up in the Y-axis direction along the end surface 31 of the light guide plate 30 (FIG. 2). A reflective layer 13 having a reflective surface 13S is provided on the substrate 11 at a position different from the light source 10 (see FIGS. 3A and 3B).

The intermediate light guide 20 includes a main body 21 in which a recess 20U is formed, and a transparent member 22 that fills the recess 20U and covers the light source 10, and propagates light L emitted from the light source 10 along the X direction. It is something to be made. The recess 20U includes a reflection curved surface 20S that faces the light source 10 and the reflection layer 13 in the Z direction. The recess 20U includes a first portion 20U1, a second portion 20U2, and a third portion 20U3 in this order in the X-axis direction. The first portion 20U1 is a portion that is filled with a transparent member 22 that covers the light source 10. Each of the second portion 20U2 and the third portion 20U3 extends in the Y-axis direction, and is provided in common to the light sources 10 arranged in the Y-axis direction. The second portion 20U2 is filled with a transparent member 26. The third portion 20U3 is a portion that sandwiches the one end 30T of the light guide plate 30 between the substrate 11 (the reflective layer 13). The second portion 20U2 is a portion located in the later-described gap region AR0, and the third portion 20U3 is a portion located in the later-described end region AR1. As a constituent material of the

transparent members

22 and 26, for example, a transparent material such as a silicone resin is used. In the present embodiment, an example in which one transparent member 22 is provided for one light source 10 will be described. In addition, the transparent member 22 is provided with two or more so that it may line up in the Y-axis direction along the end surface 31 of the light-guide plate 30 similarly to the light source 10 (FIG. 2), but in order to understand easily in FIG. Only one transparent member 22 is shown. Details of the intermediate light guide 20 will be described later.

The light guide plate 30 is a substantially rectangular parallelepiped transparent member including an end surface 31, a front surface 32, a back surface 33, a side surface 34A, and a side surface 34B (see FIG. 5). The end surface 31 is a surface facing the transparent member 22 of the intermediate light guide unit 20, and is a surface on which the light L from the light source 10 enters via the intermediate light guide unit 20. The surface 32 is a surface that intersects (preferably orthogonally) the end surface 31 and emits the light L incident from the end surface 31. The back surface 33 is a surface facing the front surface 32 and facing the reflecting member 40. The side surface 34A and the side surface 34B are surfaces that face each other in the Y-axis direction and intersect (preferably orthogonal) the end surface 31, the front surface 32, and the rear surface 33. The surface 32 extending along the XY plane has, for example, a planar shape corresponding to an irradiation object (for example, a liquid crystal panel 122 described later) disposed to face the surface 32. The front surface 32 is preferably parallel to the back surface 33. The end surface 31 is preferably perpendicular to the front surface 32 and the back surface 33. The light guide plate 30 functions as an optical member that guides light from the light source 10 from the end surface 31 to the surface 32 and radiates the light from the surface 32 to the outside. The light guide plate 30 mainly includes, for example, a transparent thermoplastic resin such as polycarbonate resin (PC) or acrylic resin (for example, PMMA (polymethyl methacrylate)), or a glass material.

The one end 30T of the light guide plate 30 is sandwiched between the third portion 20U3 of the recess 20U and the substrate 11. That is, in the end region AR1, the one end 30T of the light guide plate 30, a part of the substrate 11, and a part of the main body 21 overlap each other in the Z direction. In the light guide plate 30, an area where surface light emission is actually performed is referred to as an effective area AR2. In addition, a region between the end surface 31 of the light guide plate 30 and the first portion 20U1 in the recess 20U of the intermediate light guide unit 20 is referred to as a gap region AR0.

The surface 32 of the light guide plate 30 in the effective area AR2 is provided with a concavo-convex pattern made of fine convex portions extending in the X-axis direction, for example, in order to improve the straightness of the light L propagating through the light guide plate 30. It is good to have. The convex portion is, for example, a strip-shaped ridge or ridge extending in one direction (for example, the vertical direction) of the surface 32. For example, a scattering agent may be printed in a pattern on the back surface 33 of the light guide plate 30 as a scattering portion that scatters and makes light propagating through the light guide plate 30 uniform. In addition, as a scattering part, it replaces with a scattering agent, and besides providing the site | part containing a filler, it is also possible to make the surface partially rough.

As shown in FIG. 3A, in the end region AR1, an adhesive member 61 is filled between the light guide plate 30 and the substrate 11 (here, particularly between the light guide plate 30 and the reflective layer 13). The light guide plate 30 and the substrate 11 (reflective layer 13) are bonded by the member 61. Further, in the end region AR1, an adhesive member 62 is filled between the light guide plate 30 and the third portion 20U3 of the recess 20U in the main body 21, and the light guide plate 30 and the main body 21 are connected by the adhesive member 62. It is glued. The

adhesive members

61 and 62 are, for example, a transparent adhesive resin mainly composed of an acrylic polymer or a silicone resin.

As shown in FIG. 3B, the main body 21 is bonded to the substrate 11 (reflective layer 13) and the adhesive member 63 at a portion of the main body 21 other than the recess 20 U. Here, the portion of the main body 21 other than the recess 20U is, for example, a region 21R (see FIGS. 4A to 4C) between adjacent grooves 20V (described later). The adhesive member 63 is made of the same material as the

adhesive members

61 and 62, for example, and is filled between the surface 21S (see FIG. 3B) of the region 21R of the main body 21 and the substrate 11 (reflective layer 13). FIG. 3B shows a recess 20UA that accommodates the transparent member 22A that covers the light source 10A and a groove 20VA that communicates with the recess 20UA, and a recess 20UB and a recess 20UB that accommodates the transparent member 22B that covers the light source 10B adjacent to the light source 10A. It is a cross section between the groove | channels 20VB to perform (refer FIG. 2).

The reflection member 40 is a plate-like or sheet-like member provided facing the back surface 33 of the light guide plate 30, and enters the light guide plate 30 from the light source 10 via the intermediate light guide unit 20, and then from the back surface 33. The leaked light or the light emitted through the back surface 33 from the inside of the light guide plate 30 is returned toward the light guide plate 30. The reflection member 40 has functions such as reflection, diffusion, and scattering, for example, so that the light from the light source 10 can be efficiently used and the front luminance can be increased.

The reflecting member 40 is made of, for example, foamed PET (polyethylene terephthalate), a silver deposited film, a multilayer reflective film, or white PET. When the reflecting member 40 has a regular reflection (specular reflection) function, the surface of the reflecting member 40 is preferably subjected to a treatment such as silver vapor deposition, aluminum vapor deposition, or multilayer film reflection. When a fine shape is imparted to the reflecting member 40, the reflecting member 40 may be integrally formed by a technique such as hot press molding using a thermoplastic resin or melt extrusion molding, or, for example, PET It may be formed by applying an energy ray (for example, ultraviolet ray) curable resin on a substrate made of, for example, and then transferring the shape to the energy ray curable resin. Here, examples of the thermoplastic resin include polycarbonate resins, acrylic resins such as PMMA (polymethyl methacrylate resin), polyester resins such as polyethylene terephthalate, and amorphous copolymers such as MS (copolymer of methyl methacrylate and styrene). Examples thereof include a polymerized polyester resin, a polystyrene resin, and a polyvinyl chloride resin. Further, when the shape is transferred to an energy ray (for example, ultraviolet ray) curable resin, the substrate may be glass.

The optical sheet 50 is provided to face the surface 32 of the light guide plate 30 in the effective area AR2, and includes, for example, a diffusion plate, a diffusion sheet, a lens film, a polarization separation sheet, and the like. In each figure, only one of the plurality of optical sheets 50 is shown. By providing such an optical sheet 50, light emitted from the light guide plate 30 in an oblique direction can be raised in the front direction, and the front luminance can be further increased.

[Detailed Configuration of Intermediate Light Guide 20]
Next, a detailed configuration of the intermediate light guide unit 20 will be described. As described above, the intermediate light guide unit 20 includes the main body 21 in which the concave portion 20U is formed, and the transparent member 22 that fills the first portion 20U1 of the concave portion 20U and covers the light source 10. In the main body 21, one first portion 20 U 1 is provided for each light source 10, and for example, a plurality of first portions 20 U 1 are arranged along the Y-axis direction. The gap area AR0 is filled with a transparent member 26, and the transparent member 26 extending in the Y-axis direction is connected to each transparent member 22. The transparent member 26 is made of, for example, the same material as the transparent member 22, and transmits the light from the light source 10 as it is and guides it to the end surface 31 of the light guide plate 30.

(Configuration of the main body 21)
The main body 21 is further provided with a groove 20V connected to, for example, a portion of the recess 20U that is farthest from the end face 31 of the light guide plate 30 (see FIGS. 2, 3A, 4A, and 4B). The groove 20V extends, for example, in the −X direction so as to be away from the end face 31, and has one end connected to the recess 20U and the other end exposed outside without being covered by the substrate 11, the reflective layer 13, the optical sheet 50, or the like. The opening 20K is formed (see FIGS. 2, 3A, 4A, and 4B). The groove 20V forms a passage P (FIG. 3A) from the recess 20U to the outside together with the substrate 11, the reflective layer 13, and the optical sheet 50 that cover a part of the groove 20V. This passage P is used as a vent for removing unnecessary air when forming the transparent member 22 during the manufacture of the light emitting device 1 described later.

2, 4A and 4B, a plurality of grooves 20V (passages P) are also arranged in the Y-axis direction, like the first portion 20U1 of the recess 20U. For example, the adhesive member 63 is provided in a region 21R between the groove 20VA (passage PA) corresponding to the light source 10A (FIG. 2) and the groove 20VB (passage PB) corresponding to the light source 10B (FIG. 2).

Further, as shown in FIGS. 4A to 4C, a passage 71 (71A to 71C) reaching the gap area AR0 is formed in a portion of the main body 21 between the adjacent first portions 20U1. The passages 71 (71A to 71C) are used to allow the resin constituting the

transparent members

22 and 26 to flow into the recess 20U when the light emitting device 1 is manufactured. The transparent members 22 filled in the adjacent first portions 20U1 (for example, the transparent member 22A filled in the recess 20UA and the transparent member 22B filled in the recess 20UB) are in the transparent member 26 occupying the gap region AR0. They are connected (see FIG. 2). In addition, since the channel | path 71 is provided in the clearance gap between transparent member 22B, it does not interfere with propagation of the light L which injects into the end surface 31 of the light-guide plate 30 from the transparent member 22. FIG.

An opening 50K is provided in a partial region corresponding to a part of the passage 71 in the Z-axis direction. The opening 50K is a through hole that penetrates the optical sheet 50, the substrate 11, the reflective layer 13, and the adhesive member 63 covering the main body 21 in the Z-axis direction, and the resin can be poured into the passage 71 through the opening 50K. Yes. In the example shown in FIGS. 4A to 4C, one opening 50K is provided immediately above the joining portion 72 where the three passages 71A to 71C join, and the resin flowing in from the opening 50K enters the three passages 71A to 71C, respectively. It comes to flow. However, one opening 50K may be provided for one passage 71, or one opening 50K may be provided for two or four or more passages 71. Further, the number of passages 71 and the number of openings 50K in the main body 21 are not limited to those shown in FIGS. 4A to 4C.

The reflection curved surface 20S in the first portion 20U1 of the recess 20U is a curved surface facing the light source 10 and the reflection surface 13S in the Z-axis direction. More specifically, the reflection curved surface 20 S is curved so as to approach the end surface 31 in parallel with the surface 32 as it approaches the end surface 31 in the X-axis direction and to approach parallel to the end surface 31 as it moves away from the end surface 31. The reflective curved surface 20 S is substantially parallel to the surface 32 at a position closest to the end surface 31. The reflection curved surface 20 S is preferably a parabolic surface, for example, immediately above the light source 10. In this case, it is easier to control the light emitted from the light source 10 to the end face 31. Further, a reflection film such as a metal film made of Al, Ag, or the like formed by, for example, a plating method or a sputtering method may be provided so as to cover the reflection curved surface 20S to increase the reflectance.

The first portion 20U1 of the recess 20U includes a pair of wall surfaces 20T1 and 20T2 standing on both ends of the reflection curved surface 20S in the Y-axis direction. The wall surfaces 20T1 and 20T2 are curved surfaces facing each other in the Y-axis direction. Each of the wall surface 20T1 and the wall surface 20T2 is curved so as to approach the end surface 31 as it approaches the end surface 31 in the X-axis direction and to approach parallel to the end surface 31 as it moves away from the end surface 31. The wall surface 20T1 and the wall surface 20T2 may be substantially perpendicular to both the surface 32 and the end surface 31 at a position closest to the end surface 31. The wall surface 20T1 and the wall surface 20T2 are preferably parabolas, for example, in a portion corresponding to the light source 10 in the Y-axis direction. In this case, it is easier to control the light emitted from the light source 10 to the end face 31. Further, a reflection film such as a metal film made of Al, Ag, or the like formed by, for example, a plating method or a sputtering method may be provided so as to cover the wall surface 20T1 and the wall surface 20T2, thereby increasing the reflectance.

As shown in FIG. 5, the transparent member 22 includes an upper surface 23, side surfaces 24 A and side surfaces 24 B, and an end surface 31 of the light guide plate 30 in addition to the reflective surface 13 S that is the surface of the reflective layer 13 provided on the substrate 11. And an opposite facing surface 25. The facing surface 25 is in contact with the transparent member 26. The light source 10 is surrounded by the reflecting surface 13S, the upper surface 23, the side surface 24A, the side surface 24B, and the facing surface 25. For this reason, the light emitted from the light source 10 is directly incident on the facing surface 25, or the reflecting surface 13S, the upper surface 23, the side surface 24A, and the side surface 24B (hereinafter, these are collectively referred to as “the reflecting surface of the transparent member 22”). In this case, the light is incident on the opposing surface 25 after being reflected. The light incident on the facing surface 25 passes through the transparent member 26 and enters the light guide plate 30 from the end surface 31 of the light guide plate 30.

The upper surface 23 is a curved surface facing the light source 10 and the reflecting surface 13S in the Z-axis direction. Specifically, the upper surface 23 is curved so as to approach parallel to the surface 32 as it approaches the end surface 31 in the X-axis direction and to approach parallel to the end surface 31 as it moves away from the surface 32. The upper surface 23 is substantially parallel to the surface 32 at a position closest to the end surface 31. The upper surface 23 may have a parabolic cross section in the XZ plane. This is because it becomes easier to control the light emitted from the light source 10 to the end face 31.

The side surface 24A and the side surface 24B are curved surfaces erected on the substrate 11 while facing each other with the upper surface 23 and the reflection surface 13S interposed therebetween in the Y-axis direction. Specifically, each of the side surface 24A and the side surface 24B is curved so as to approach the end surface 31 as it approaches the end surface 31 in the X-axis direction and to approach parallel to the end surface 31 as it moves away from the end surface 31. The side surface 24 A and the side surface 24 B are substantially perpendicular to both the surface 32 and the end surface 31 at a position closest to the end surface 31. Further, the side surface 24A and the side surface 24B may each include a curved surface portion having a parabolic cross section in the XY plane. This is because it becomes easier to control the light emitted from the light source 10 to the end face 31.

[Method for Manufacturing Light-Emitting Device 1]
Next, a method for manufacturing the light emitting device 1 will be described.

First, the substrate 11 on which the light source 10 and the reflective layer 13 are formed, the main body 21 on which the recess 20U, the groove 20V and the passage 71 are formed, and the light guide plate 30 are prepared.

Next, the adhesive member 62 is attached to the third portion 20U3 of the main body 21 by coating or pasting. After that, the one end 30T of the light guide plate 30 is brought into contact with the adhesive member 62, and the one end 30T is bonded to the third portion 20U3.

Next, the adhesive member 61 is attached to the surface 32 of the one end 30T of the light guide plate 30 by coating or pasting. Similarly, the adhesive member 63 is attached to the surface 21S of the region 21R in the main body 21 by coating or pasting. After that, the substrate 11 is placed on the main body 21 so as to sandwich the one end 30T of the light guide plate 30, and the reflective layer 13 provided on the substrate 11 and the adhesive members 61 and 63 are bonded to each other.

Next, a transparent resin such as an ultraviolet (UV) curable resin is poured into the passage 71 from the opening 50K as a raw material constituting the

transparent members

22 and 26, and the recess 20U is filled with the transparent resin. The transparent resin reaches the first portion 20U1 from the passage 71 via the second portion 20U2, and enters the groove 20V in some cases. At that time, the groove 20V communicating with the recess 20U functions as a passage P for discharging air. Further, the adhesive members 61 to 63 suppress the outflow of the transparent resin from the concave portion 20U.

Thereafter, the

transparent members

22 and 26 are formed by curing the transparent resin, for example, by irradiating the transparent resin with ultraviolet rays. Finally, the light emitting device 1 is completed by providing the optical sheet 50 on the substrate 11.

[Operation and Effect of Light-Emitting Device 1]
In the light emitting device 1 of the present embodiment, the gap between the substrate 11 and the light guide plate 30, the gap between the main body 21 and the light guide plate 30, and the gap between the surface 21 S of the main body 21 and the substrate 11 (or the reflective layer 13), respectively. Adhesive members 61 to 63 are provided. Therefore, a gap other than the passage P, that is, a gap between the substrate 11 and the light guide plate 30, a gap between the main body 21 and the light guide plate 30, and a gap between the surface 21S of the main body 21 and the substrate 11 (or the reflective layer 13) are sealed. It has been stopped. Therefore, it is possible to avoid outflow of the transparent resin that has been introduced to form the

transparent members

22 and 26, that is, the transparent resin that should be filled in the recess 20U in the in-plane direction. As a result, the

transparent members

22 and 26 having highly accurate dimensions can be obtained.

Further, in the light emitting device 1, a groove 20V communicating with the recess 20U (the first portion 20U1 thereof) is provided. The groove 20V functions as a vent hole through which unnecessary air existing in the recess 20U escapes when the

transparent members

22 and 26 are formed. Therefore, if the transparent resin flows into the concave portion 20U of the main body 21 with the opening 20K facing upward in the vertical direction, the concave portion 20U can be prevented from being trapped and the first portion 20U1 can be reliably filled with the resin. .

Thus, according to the light emitting device 1 of the present embodiment, when the

transparent members

22 and 26 are manufactured, the transparent resin is more smoothly filled into the recess 20U while avoiding the outflow of the transparent resin to the outside. It becomes possible to do. At that time, it is possible to avoid unnecessary bubbles from being mixed into the

transparent members

22 and 26. As a result, the

transparent members

22 and 26 having highly accurate dimensions can be manufactured in a shorter time.

Since the light emitting device 1 includes the

transparent members

22 and 26 having highly accurate dimensions, most of the light L emitted from the light source 10 is reflected on the reflecting surface 13S, the upper surface 23, the side surface 24A, and the intermediate light guide unit 20. The light propagates in the X-axis direction while being reflected on the side surface 24B, and enters the light guide plate 30 from the end surface 31. Therefore, in the light-emitting device 1, the component which leaks outside without entering into the light-guide plate 30 among the lights emitted from the light source 10 can be reduced, and luminous efficiency can be further improved. For this reason, the number of the plurality of light sources 10 arranged in the Y-axis direction can be reduced, and the interval between the adjacent light sources 10 in the Y-axis direction can be increased.

<2. Second Embodiment>
FIG. 6 illustrates an appearance of the display device 101 according to the second embodiment of the present technology. The display device 101 includes the light emitting device 1 and is used as, for example, a thin television device, and has a configuration in which a flat main body 102 for image display is supported by a stand 103. The display device 101 is used as a stationary type with the stand 103 attached to the main body 102 and placed on a horizontal surface such as a floor, a shelf, or a stand, but the stand 103 is removed from the main body 102. It can also be used as a wall-hanging type.

FIG. 7 is an exploded view of the main body 102 shown in FIG. The main body 102 has, for example, a front exterior member (bezel) 111, a panel module 112, and a rear exterior member (rear cover) 113 in this order from the front side (viewer side). The front exterior member 111 is a frame-shaped member that covers the peripheral edge of the front surface of the panel module 112, and a pair of speakers 114 are disposed below the front exterior member 111. The panel module 112 is fixed to the front exterior member 111, and a power supply board 115 and a signal board 116 are mounted on the rear surface thereof, and a mounting bracket 117 is fixed. The mounting bracket 117 is for mounting a wall-mounted bracket, mounting a board, etc., and mounting the stand 103. The rear exterior member 113 covers the back and side surfaces of the panel module 112.

FIG. 8 is an exploded view of the panel module 112 shown in FIG. The panel module 112 includes, for example, a front casing (top chassis) 121, a liquid crystal panel 122, a frame member (middle chassis) 80, an optical sheet 50, and a light guide plate 30 from the front side (viewer side). The light source 10, the reflection member 40, the rear housing (back chassis) 124, and the timing controller board 127 are provided in this order.

The front housing 121 is a frame-shaped metal part that covers the front peripheral edge of the liquid crystal panel 122. The liquid crystal panel 122 includes, for example, a liquid crystal cell 122A, a source substrate 122B, and a flexible substrate 122C such as a COF (Chip On On Film) that connects them. The frame-shaped member 80 is a frame-shaped resin component that holds the liquid crystal panel 122 and the optical sheet 50. The rear housing 124 is a metal part made of iron (Fe) or the like that houses the liquid crystal panel 122, the frame-shaped member 80, and the light emitting device 1. The timing controller board 127 is also mounted on the back surface of the rear housing 124.

In the display device 101, the light from the light emitting device 1 is selectively transmitted through the liquid crystal panel 122, thereby displaying an image. As described in the first embodiment, the display device 101 includes the light emitting device 1 that includes the

transparent members

22 and 26 having highly accurate dimensions and has improved luminous efficiency. For this reason, it is possible to save power while maintaining the display quality of the display device 101.

<3. Application example of display device>
Hereinafter, application examples of the display device 101 as described above to an electronic device will be described. Examples of the electronic device include a television device, a digital camera, a notebook personal computer, a mobile terminal device such as a mobile phone, or a video camera. In other words, the display device can be applied to electronic devices in various fields that display a video signal input from the outside or a video signal generated inside as an image or video.

[Application Example 1]
FIG. 9A shows the appearance of a tablet terminal device to which the display device 101 of the above embodiment is applied. FIG. 9B shows the appearance of another tablet terminal device to which the display device 101 of the above embodiment is applied. Each of these tablet-type terminal devices has, for example, a display unit 210 and a non-display unit 220, and the display unit 210 is configured by the display device 101 of the above embodiment.

<4. Application example of lighting device>
10 and 11 show the appearance of a desk lamp or a floor-standing lighting apparatus to which the light emitting device 1 according to the first embodiment is applied. For example, the illumination device is configured by attaching an illumination unit 843 to a support column 842 provided on a base 841, and the illumination unit 843 is configured by the light emitting device 1. The illumination unit 843 has an arbitrary shape such as a cylindrical shape shown in FIG. 10 or a curved shape shown in FIG. 11 by making the substrate 11, the intermediate light guide unit 20, the light guide plate 30 and the optical sheet 50 into a curved shape. It can be shaped.

FIG. 12 shows an appearance of an indoor lighting device to which the light emitting device 1 is applied. This illuminating device includes, for example, an illuminating unit 844 configured by any one of the light emitting devices 1 to 3 described above. The illumination units 844 are arranged at an appropriate number and interval on the ceiling 850A of the building. Note that the lighting unit 844 can be installed not only in the ceiling 850A but also in an arbitrary place such as a wall 850B or a floor (not shown) depending on the application.

In these illumination devices, illumination is performed by light from the light emitting device 1. Here, since the light emitting devices 1 to 3 having improved luminous efficiency are provided, power saving during illumination can be realized.

<5. Other variations>
While the present disclosure has been described with reference to the embodiment, the present disclosure is not limited to the above embodiment, and various modifications can be made. For example, the material and shape of each member described in the above embodiment are not limited, and other materials and shapes may be used.

For example, although the case where the light source 10 is an LED has been described in the above embodiment, the light source 10 may be configured by a semiconductor laser or the like.

Further, for example, the configurations of the light emitting device 1 and the display device 101 (television device) have been specifically described in the above embodiment, but they do not have to include all the components, and some of the components May be missing. Moreover, you may provide the other component.

In addition, the effect described in this specification is an illustration to the last, and is not limited to the description, There may exist another effect. Moreover, this technique can take the following structures.
(1)
A substrate,
A first light source provided on the substrate and emitting first light;
A reflective layer provided on the substrate at a position different from the first light source;
A main body having a first recess including a first reflection curved surface facing the first light source and the reflection layer in a first direction, and filling the first recess with the first light source. An intermediate light guide that propagates along a second direction orthogonal to the first direction, the first light emitted from the first light source;
One end of the first recess sandwiched between the first end and the substrate, and the first light emitted from the first light source provided at the one end and the intermediate light guide A light guide plate including an end surface that is incident via an optical portion and a main surface from which the first light incident from the end surface is emitted;
A first adhesive member that is filled between the one end of the light guide plate and the substrate and bonds the light guide plate and the substrate;
A light emitting device comprising: a second adhesive member that is filled between the one end portion of the light guide plate and the first end portion of the first recess and bonds the light guide plate and the main body.
(2)
The light emitting device according to (1), wherein the first adhesive member and the second adhesive member are transparent.
(3)
The light emitting device according to (1) or (2), further including a third adhesive member that is filled between the main body and the substrate and adheres the main body and the substrate.
(4)
The light emitting device according to any one of (1) to (3), further including a first passage from the first recess to the outside.
(5)
The first passage is formed by a first groove provided on an opposing surface of the main body facing the substrate, and the substrate or the reflective layer partially covering the first groove. The light-emitting device according to (4), including a part.
(6)
A second light source that emits second light and is provided on the substrate so as to be adjacent to the first light source in a third direction orthogonal to both the first direction and the second direction;
A second recess formed in the main body so as to be adjacent to the first recess in the third direction and including a second reflection curved surface facing the second light source and the reflection film;
A second transparent member that fills the second recess and covers the second light source;
A second passage from the second recess to the outside, and
The one end of the light guide plate is also sandwiched between the second end of the second recess and the substrate,
The second light emitted from the second light source is incident on the end surface of the light guide plate via the intermediate light guide,
The main surface of the light guide plate emits the second light incident from the end surface,
The first adhesive member is filled between the one end portion of the light guide plate and the second end portion of the second recess to bond the light guide plate and the main body (3) ) To (5).
(7)
The light emitting device according to (6), wherein the third adhesive member is provided in a region between the first passage and the second passage.
(8)
A passage reaching the first transparent member and the second transparent member is formed in a portion of the main body between the first concave portion and the second concave portion. (6) or (7 ).
(9)
The first transparent member and the second transparent member are respectively a transparent communication member extending in the third direction in a gap region between the light guide plate and the first concave portion and the second concave portion. The light emitting device according to any one of (6) to (8), wherein the light emitting device is connected.
(10)
The first reflection curved surface includes an upper paraboloid portion in which a cross section including the first direction and the second direction forms a parabola shape. (1) to (9) Light emitting device.
(11)
In the first direction, the first reflection curved surface is curved so as to approach the end surface in parallel with the main surface and to approach in parallel to the end surface as the distance from the end surface increases. The light emitting device according to any one of (1) to (10), wherein the light emitting device is substantially parallel to the main surface at a close position.
(12)
A light emitting device that emits light;
A display panel arranged to overlap the light emitting device and displaying an image using light from the light emitting device,
The light emitting device
A substrate,
A first light source provided on the substrate and emitting first light;
A reflective layer provided on the substrate at a position different from the first light source;
A main body having a first recess including a first reflection curved surface facing the first light source and the reflection layer in a first direction, and filling the first recess with the first light source. An intermediate light guide that propagates along a second direction orthogonal to the first direction, the first light emitted from the first light source;
One end of the first recess sandwiched between the first end and the substrate, and the first light emitted from the first light source provided at the one end and the intermediate light guide A light guide plate including an end surface that is incident via an optical portion and a main surface from which the first light incident from the end surface is emitted;
A first adhesive member that is filled between the one end of the light guide plate and the substrate and bonds the light guide plate and the substrate;
A display device, comprising: a second adhesive member that is filled between the one end portion of the light guide plate and the first end portion of the first recess to bond the light guide plate and the main body.
(13)
With a light emitting device,
The light emitting device
A substrate,
A first light source provided on the substrate and emitting first light;
A reflective layer provided on the substrate at a position different from the first light source;
A main body having a first recess including a first reflection curved surface facing the first light source and the reflection layer in a first direction, and filling the first recess with the first light source. An intermediate light guide that propagates along a second direction orthogonal to the first direction, the first light emitted from the first light source;
One end of the first recess sandwiched between the first end and the substrate, and the first light emitted from the first light source provided at the one end and the intermediate light guide A light guide plate including an end surface that is incident via an optical portion and a main surface from which the first light incident from the end surface is emitted;
A first adhesive member that is filled between the one end of the light guide plate and the substrate and bonds the light guide plate and the substrate;
A lighting device comprising: a second adhesive member that is filled between the one end portion of the light guide plate and the first end portion of the first recess and bonds the light guide plate and the main body.

This application claims priority on the basis of Japanese Patent Application No. 2016-67473 filed on March 30, 2016 at the Japan Patent Office. The entire contents of this application are hereby incorporated by reference. Incorporated into.

Those skilled in the art will envision various modifications, combinations, subcombinations, and changes, depending on design requirements and other factors, which are within the scope of the appended claims and their equivalents. It is understood that

Claims

A substrate,
A first light source provided on the substrate and emitting first light;
A reflective layer provided on the substrate at a position different from the first light source;
A main body having a first recess including a first reflection curved surface facing the first light source and the reflection layer in a first direction, and filling the first recess with the first light source. An intermediate light guide that propagates along a second direction orthogonal to the first direction, the first light emitted from the first light source;
One end of the first recess sandwiched between the first end and the substrate, and the first light emitted from the first light source provided at the one end and the intermediate light guide A light guide plate including an end surface that is incident via an optical portion and a main surface from which the first light incident from the end surface is emitted;
A first adhesive member that is filled between the one end of the light guide plate and the substrate and bonds the light guide plate and the substrate;
A light emitting device comprising: a second adhesive member that is filled between the one end portion of the light guide plate and the first end portion of the first recess and bonds the light guide plate and the main body.
The light emitting device according to claim 1, wherein the first adhesive member and the second adhesive member are transparent.
The light emitting device according to claim 1, further comprising a third adhesive member that is filled between the main body and the substrate and adheres the main body and the substrate.
The light-emitting device according to claim 1, further comprising a first passage from the first recess to the outside.
The first passage is formed by a first groove provided on an opposing surface of the main body facing the substrate, and the substrate or the reflective layer partially covering the first groove. The light emitting device according to claim 4, including a portion.
A second light source that emits second light and is provided on the substrate so as to be adjacent to the first light source in a third direction orthogonal to both the first direction and the second direction;
A second recess formed in the main body so as to be adjacent to the first recess in the third direction and including a second reflection curved surface facing the second light source and the reflection film;
A second transparent member that fills the second recess and covers the second light source;
A second passage from the second recess to the outside, and
The one end of the light guide plate is also sandwiched between the second end of the second recess and the substrate,
The second light emitted from the second light source is incident on the end surface of the light guide plate via the intermediate light guide,
The main surface of the light guide plate emits the second light incident from the end surface,
4. The first adhesive member is filled between the one end portion of the light guide plate and the second end portion of the second recess to bond the light guide plate and the main body. The light-emitting device of description.
The light emitting device according to claim 6, wherein the third adhesive member is provided in a region between the first passage and the second passage.
The light-emitting device according to claim 6, wherein a passage leading to the first transparent member and the second transparent member is formed in a portion of the main body between the first concave portion and the second concave portion. .
The first transparent member and the second transparent member are respectively a transparent communication member extending in the third direction in a gap region between the light guide plate and the first concave portion and the second concave portion. The light-emitting device according to claim 6.
The light-emitting device according to claim 1, wherein the first reflection curved surface includes an upper paraboloid portion in which a cross section including the first direction and the second direction forms a parabolic shape.
In the first direction, the first reflection curved surface is curved so as to approach the end surface in parallel with the main surface and to approach the end surface in parallel with the end surface as it approaches the end surface. The light emitting device according to claim 1, wherein the light emitting device is substantially parallel to the main surface at a close position.
A light emitting device that emits light;
A display panel arranged to overlap the light emitting device and displaying an image using light from the light emitting device,
The light emitting device
A substrate,
A first light source provided on the substrate and emitting first light;
A reflective layer provided on the substrate at a position different from the first light source;
A main body having a first recess including a first reflection curved surface facing the first light source and the reflection layer in a first direction, and filling the first recess with the first light source. An intermediate light guide that propagates along a second direction orthogonal to the first direction, the first light emitted from the first light source;
One end of the first recess sandwiched between the first end and the substrate, and the first light emitted from the first light source provided at the one end and the intermediate light guide A light guide plate including an end surface that is incident via an optical portion and a main surface from which the first light incident from the end surface is emitted;
A first adhesive member that is filled between the one end of the light guide plate and the substrate and bonds the light guide plate and the substrate;
A display device, comprising: a second adhesive member that is filled between the one end portion of the light guide plate and the first end portion of the first recess to bond the light guide plate and the main body.
With a light emitting device,
The light emitting device
A substrate,
A first light source provided on the substrate and emitting first light;
A reflective layer provided on the substrate at a position different from the first light source;
A main body having a first recess including a first reflection curved surface facing the first light source and the reflection layer in a first direction, and filling the first recess with the first light source. An intermediate light guide that propagates along a second direction orthogonal to the first direction, the first light emitted from the first light source;
One end of the first recess sandwiched between the first end and the substrate, and the first light emitted from the first light source provided at the one end and the intermediate light guide A light guide plate including an end surface that is incident via an optical portion and a main surface from which the first light incident from the end surface is emitted;
A first adhesive member that is filled between the one end of the light guide plate and the substrate and bonds the light guide plate and the substrate;
A lighting device comprising: a second adhesive member that is filled between the one end portion of the light guide plate and the first end portion of the first recess and bonds the light guide plate and the main body.