JP5152939B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device in which a wide variety of light guide plates are arranged in three dimensions.

  Conventionally, regarding an LED lamp using a light emitting diode as a light source, in order to obtain a brightness equivalent to 40 W to 60 W with an incandescent light bulb, for example, a resin light guide feather branched from a center toward an outer periphery is provided. There is a configuration of an LED lamp (for example, see Patent Document 1).

JP 2008-77900 A

  However, in the configuration as described above, the light of the high-intensity LED module that is incident from one end of the light guide wing is led out from the other end of the light guide wing in the straight direction, and thus there is a problem that the light distribution characteristic is biased. It was.

  Therefore, in view of the above-described technical problems, the present invention has a predetermined radiation angle from the emission surface without attenuating the light of the light source incident from the incident surface of the light guide plate by multiple reflection inside the light guide plate. An object is to provide a lighting device that can be derived.

  In order to solve the above-described problems, an illumination device according to the present invention includes a power receiving unit to which electric power is supplied from the outside, a power source unit connected to the power receiving unit and converting the power into predetermined driving power, and the power source. A light source unit that emits light by the driving power, a housing unit that houses the power source unit and the light source unit, and a plate-like shape that guides the light of the light source unit incident from the incident surface from the output surface A light guide plate that protrudes from one end of the housing, and the light guide plate is adjacent to and perpendicular to the incident surface, and a second light emitting surface facing the incident surface. The second emission surface is a curved surface provided on the outer side in the radial direction of the casing portion and a normal direction of the incident surface provided on the inner side in the radial direction of the casing portion. The position where the flat surface inclined at a predetermined angle is in contact with the light source section is perpendicular to the light source section. Characterized in that it farthest toward.

  According to the illuminating device of the present invention, the light of the light source incident from the incident surface of the light guide plate can be derived from the output surface at a predetermined radiation angle without being attenuated by multiple reflection inside the light guide plate. it can.

It is a perspective view which shows the illuminating device which concerns on the 1st Embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the illuminating device which concerns on the 1st Embodiment of this invention for every structure. It is a schematic diagram which shows the basic optical characteristic of the light-guide plate provided in the light guide part of the illuminating device which concerns on the 1st Embodiment of this invention, (a) is the light below a critical angle on the output surface of a light-guide plate. FIG. 5B is a schematic diagram when light exceeding a critical angle is incident on the light exit surface of the light guide plate. It is a schematic diagram which shows the optical characteristic which concerns on the light-guide plate formed in the substantially trapezoid trapezoid shape provided in the light guide part of the illuminating device which concerns on the 1st Embodiment of this invention, (a) is the optical characteristic which concerns on a light-guide plate. FIG. 4B is a schematic diagram showing the light guide plate from the first emission surface, and FIG. 5B is a schematic diagram showing the light guide plate from the second emission surface. It is a schematic diagram which shows the optical characteristic which concerns on the light-guide plate formed in the substantially trapezoid trapezoid shape provided in the light guide part of the illuminating device which concerns on the 1st Embodiment of this invention from a 1st output surface, (a) thru | or (D) is a schematic diagram which shows the optical characteristic in the output location of the predetermined light in each output surface, respectively. It is a schematic diagram which shows the optical characteristic which concerns on the light-guide plate formed in the substantially trapezoid trapezoid shape provided in the light guide part of the illuminating device which concerns on the 1st Embodiment of this invention from a 2nd output surface. It is a schematic diagram which shows the optical characteristic which concerns on the light-guide plate formed in the polyhedron shape containing the curved surface provided in the light guide part of the illuminating device which concerns on the 1st Embodiment of this invention from a 1st output surface. It is a schematic diagram which shows the optical characteristic which concerns on the light-guide plate formed in the polyhedron shape containing the curved surface provided in the light guide part of the illuminating device which concerns on the 1st Embodiment of this invention from a 1st output surface, (a). (D) to (d) are schematic diagrams respectively showing optical characteristics at predetermined light emission locations on the respective emission surfaces. It is a perspective view which shows the light source part which provided the light-guide plate with which the curved surface and slope which comprise the illuminating device which concerns on the 1st Embodiment of this invention were adjacent, and the light source part adjacent to this light-guide part. It is a schematic diagram which shows the optical characteristic of the light-guide plate with which the curved surface and the inclined surface adjoined in the illuminating device which concerns on the 1st Embodiment of this invention from the side of this light-guide plate, and respond | corresponds to FIG. A plurality of planes are connected to form a polyhedron shape so that the angle formed with the incident surface increases from the center to the outside provided in the light guide portion of the lighting device according to the first embodiment of the present invention. It is a schematic diagram which shows the optical characteristic which concerns on the light guide plate from the 1st output surface. A plurality of planes are connected to form a polyhedron shape so that the angle formed with the incident surface from one to the other provided in the light guide portion of the lighting device according to the first embodiment of the present invention increases stepwise. FIG. 4A is a schematic diagram illustrating optical characteristics related to the light guide plate, FIG. 5A is a schematic diagram illustrating optical characteristics related to the light guide plate from a first emission surface, and FIG. It is a schematic diagram shown from the surface. It is a perspective view which shows the illuminating device which concerns on the 2nd Embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the illuminating device which concerns on the 2nd Embodiment of this invention for every structure. It is a schematic diagram which shows in cross section the light source plate which comprises the illuminating device which concerns on the 2nd Embodiment of this invention, and the light source adjacent to the entrance plane of this light guide plate. It is a schematic diagram which each shows the light source adjacent to the light-guide plate which comprises the illuminating device which concerns on the 2nd Embodiment of this invention, and the entrance plane of this light-guide plate in a cross section, (a) is a concave pattern 1st emission. The schematic diagram which shows the light source adjacent to the incident surface of the light-guide plate formed in the one side of the surface by the equal depth, and the light-guide plate, (b) is a concave pattern from the incident surface on both sides of the 1st output surface It is a schematic diagram which shows the light source adjacent to the incident surface of the light-guide plate formed so that it may become deep whenever it leaves | separates, and this light-guide plate. It is a schematic diagram which shows a part of light-guide plate in which the pattern which consists of a quadrangular pyramid which comprises the illuminating device which concerns on the 2nd Embodiment of this invention was formed in matrix form. It is a schematic diagram which shows the pattern of the quadrangular pyramid formed in the light-guide plate which comprises the illuminating device which concerns on the 2nd Embodiment of this invention, (a) is a model which shows this pattern from the 1st output surface of a light-guide plate. FIG. 4B is a schematic diagram showing the pattern in section from the second light exit surface of the light guide plate.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a lighting device of the invention will be described with reference to the drawings. In addition, the illuminating device of this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably.

  Moreover, in the following description, the illuminating device 1 of the 1st Embodiment of this invention is demonstrated first, referring FIG. 1 thru | or FIG. Next, a lighting device 2 according to a second embodiment of the present invention will be described with reference to FIGS. Next, the manufacturing method of the light-guide plate provided in the illuminating device 2 of the 2nd Embodiment of this invention is demonstrated. Finally, the configuration and main functions and effects of each lighting device according to the first and second embodiments of the present invention will be described for each claim.

[First Embodiment]
Hereinafter, the illuminating device 1 of the 1st Embodiment of this invention is demonstrated concretely, referring FIG. 1 thru | or FIG. First, the configuration of the illuminating device 1 will be described with reference to FIGS. 1 and 2, and the details of the configuration of the light guide 50 provided in the illuminating device 1 and the optical characteristics will be described with reference to FIGS. 3 to 8. The configuration and optical characteristics according to a modification of the light guide 50 provided in the illumination device 1 will be described with reference to FIGS.

  First, the structure of the illuminating device 1 is demonstrated concretely, referring FIG.1 and FIG.2. The illuminating device 1 of 1st Embodiment is comprised from the power receiving part 10, the power supply part 20, the light source part 30, the housing | casing part 40, and the light guide part 50, as shown, for example in FIG.1 and FIG.2. Hereinafter, each structure of the illuminating device 1 is demonstrated in order.

  The power receiving unit 10 constituting the lighting device 1 of the first embodiment is supplied with electric power from the outside. Such a power receiving unit 10 includes a base 11 and an insulating case 12 as shown in FIG. Hereinafter, the configuration of the power receiving unit 10 will be described. The base 11 of the power reception unit 10 is made of metal, for example, the outer peripheral surface 11a is formed in a conical shape having spiral irregularities, and has a cavity inside. Such an outer peripheral surface 11a of the base 11 is screwed into, for example, a socket installed in an indoor facility to receive power supply. Moreover, the diameter of the nozzle | cap | die 11 is 26 mm in diameter which is a general size, for example. In addition, it is not limited to the structure which provides the nozzle | cap | die 11 in the power receiving part 10, For example, the structure which provides the plug which plugs into an outlet and receives power supply, or the terminal which receives power supply by connecting a generator or a storage battery It is good also as a structure which provides. Further, the insulating case 12 of the power receiving unit 10 is made of, for example, plastics having insulating properties and is formed in a cylindrical shape. Such an insulating case 12 is joined by fitting one end 12a of the insulating case 12 into the inner peripheral surface 11b of the base 11 and fitting the other end 12b into a case 41 of the case portion 40 described later. Has been. In addition, a power supply circuit 21 of the power supply unit 20 described later is stored in the storage recess 12 c inside the insulating case 12. Further, the screw hole 12d provided in the other end 12b of the insulating case 12 is for joining and fixing to a housing 41 of the housing portion 40 described later.

  The power supply unit 20 constituting the lighting device 1 of the first embodiment is connected to the power receiving unit 10, and the power supplied from the outside via the wiring 22 connected to the base 11 of the power receiving unit 10 is used as a predetermined driving power. Convert to As shown in FIG. 2, such a power supply unit 20 includes a power supply circuit 21, a wiring 22, and a wiring 23. Hereinafter, the configuration of the power supply unit 20 will be described. The power supply circuit 21 of the power supply unit 20 adjusts the power input from the outside through the wiring 22 connected to the base 11 of the power reception unit 10 from 100 V to 24 V, for example, in accordance with the rating of the light source 31 of the light source unit 30 described later. Step down, rectification to DC constant current, pulse modulation after rectification, noise removal, and the like are performed. Such a power supply circuit 21 includes, for example, a transformer, a rectifier, and a capacitor. Further, the driving power generated by the power supply circuit 21 is supplied to the light source 31 of the light source unit 30 to be described later via the wiring 23.

  The light source unit 30 constituting the lighting device 1 of the first embodiment is connected to the power supply unit 20 and emits light by the driving power supplied from the power supply unit 20. Such a light source unit 30 includes a light source 31 and a substrate 32 as shown in FIG. Hereinafter, the configuration of the light source unit 30 will be described. The light source 31 of the light source unit 30 includes, for example, a light emitting diode (LED) that emits white light. Further, as shown in FIG. 2, a plurality of light sources 31 are provided directly below the incident surface 51 a of the light guide plate 51 and the incident surface 52 a of the light guide plate 52 that constitute the light guide unit 50 described later. The light source 31 is not limited to a white LED, for example, an LED formed of any one of white, red, orange, yellow, green, blue, indigo, and purple or a combination of these colors. It may be configured. Similarly, the light source 31 may be constituted by an LED that emits light in the ultraviolet region. Similarly, the light source 31 may be composed of, for example, an organic light emitting diode, a fluorescent tube, a cold cathode tube, or a neon tube.

  Regarding the light source unit 30, the substrate 32 is a member for mounting the light sources 31 in a predetermined arrangement. Such a substrate 32 is made of, for example, aluminum that is lightweight and has a certain strength, and is formed in a disk shape. The substrate 32 may be a copper plate excellent in heat dissipation or a glass epoxy substrate excellent in workability. Here, as shown in FIG. 2, ten light sources 31 made of surface-mounted LEDs, for example, are arranged in a cross shape on the substrate 32. Although not shown, the wiring 23 is passed through a wiring hole 32a opened in the substrate 32, and the wiring 23 is connected to, for example, a soldering pad 32b. For example, a connector may be provided on the wiring 23 and the connector may be detachably inserted into a socket (not shown) provided on the substrate 32. Although details will be described later, the substrate 32 is screwed to a housing 41 of the housing portion 40 described later through a plurality of screw holes 32 c opened in the substrate 32.

  The housing unit 40 that constitutes the lighting device 1 of the first embodiment houses the power supply unit 20 and the light source unit 30. As shown in FIG. 2, such a housing unit 40 includes a housing 41, a fixing member 42, a holding member 43, and a fixing member 44. Hereinafter, the structure of the housing | casing part 40 is demonstrated. The housing | casing 41 consists of aluminum, for example, and is formed in hemispherical shape. Further, although not shown, the wiring 23 of the power supply unit 20 is passed through the wiring hole 41a opened in the housing 41. Further, a fixing member 42 made of, for example, a flat screw is passed through the screw hole 41b opened in the housing 41, and then screwed into the screw hole 12d of the insulating case 12 of the power receiving unit 10 described above. The insulating case 12 and the housing 41 are joined. Further, the back surface of the substrate 32 is brought into contact with the substrate housing recess 41 c formed in the housing 41. In addition, the heat radiation surface 41e formed on the outer periphery of the housing 41 increases the surface area of the housing 41 to efficiently dissipate heat generated in the power supply unit 20 and the light source unit 30. A plurality of heat radiation fins may be formed. For example, when the drive current value of the light source 31 is sufficiently low, or when the power loss in the power supply circuit 21 is small, it is not necessary to provide a heat dissipation fin on the heat dissipation surface 41e.

  Further, with respect to the housing part 40, the holding member 43 is composed of a pair, and for example, as shown in FIG. 2, engages with a light guide plate 51 and a light guide plate 52 of the light guide part 50 to be described later and holds them in the housing 41. Has been. Such a holding member 43 is made of, for example, aluminum and is formed in a semi-disc shape. Specifically, in a state in which the light guide plate 51 and the light guide plate 52 are combined, the connection notches 43a opened at the centers of the pair of holding members 43 are concave shapes provided at both ends of the lower portion of the light guide plate 52. The contact surface 43c is inserted into the coupling cutout 52j and is in contact with the light guide plate 52 so as to be detachably engaged. Similarly, protrusions 43 b formed on both ends of the pair of holding members 43 are inserted into concave connection cutouts 51 j provided on both ends of the lower portion of the light guide plate 51, and the contact surfaces 43 c are formed on the light guide plate 51. Abutted and detachably engaged.

  Here, with respect to the housing portion 40, the outer peripheral surfaces 43 d of the pair of holding members 43 are arranged so that the substrate housing recess 41 c of the housing 41 in a state where the pair of holding members 43 are engaged with the light guide plate 51 and the light guide plate 52. A pair of holding members 43 are inserted into the housing 41 so as to abut on the inner peripheral surface 41 f formed on the housing 41. Further, a fixing member 44 made of, for example, a pan screw is passed through a screw hole 43e opened in the pair of holding members 43 and a screw hole 32c opened in the substrate 32 in this order. Then, the fixing member 44 is screwed into a screw hole 41 d provided in the substrate housing recess 41 c of the housing 41, so that the light guide plate 51, the light guide plate 52, and the substrate 32 are interposed via the pair of holding members 43. The housing 41 is detachably held. In addition, you may seal the screw hole 43e of a pair of holding member 43 in which the fixing member 44 was inserted, for example with the adhesive agent containing the reflecting agent.

  The light guide part 50 which comprises the illuminating device 1 of 1st Embodiment was provided protruding from the end of the housing | casing part 40, and the light of the light source part 30 entered from the incident surface was formed in the curved surface or plane. Derived from the exit surface. Further, at least one of the exit surfaces of the light guide 50 is inclined at a predetermined angle with respect to the normal direction of the incident surface. Here, the structure of the light guide plate 51 and the light guide plate 52 provided in the light guide unit 50 will be specifically described with reference to FIG. The light guide unit 50 is configured by combining, for example, a light guide plate 51 and a light guide plate 52 in a cross shape. Each of the light guide plate 51 and the light guide plate 52 is made of, for example, a transparent acrylic resin plate. The light guide plate 51 and the light guide plate 52 are not limited to transparent resin plates, and colored resin plates may be used. Further, for the light guide plate 51 and the light guide plate 52, for example, a resin plate to which a particulate diffusion member that emits diffused light when irradiated with light in the visible range may be used. Similarly, for the light guide plate 51 and the light guide plate 52, for example, a resin plate coated or added with a fluorescent agent that emits fluorescence when irradiated with light in the ultraviolet region or visible region may be used. The light guide plate 51 and the light guide plate 52 are coated with a silicone coating agent or glass coating agent (not shown) having waterproof, antifouling, and dustproof functions, or have waterproof, antifouling, and dustproof functions. A transparent resin (not shown) may be coated.

  Moreover, regarding the light guide unit 50, the light guide plate 51 and the light guide plate 52 are each formed from a pair of substantially trapezoidal trapezoidal shapes so as to face each other. Specifically, the light guide plate 51 has an incident surface 51 a on which light from the light source 31 is incident at a position facing the light source 31 of the light source unit 30. Further, a first emission surface 51b and a first emission surface 51c intersecting with the incident surface 51a are formed to face each other. Similarly, the first emission surface 51d and the first emission surface 51g are formed to face each other. Here, between the first emission surface 51g and the first emission surface 51b, the first emission surface 51i is formed adjacently so as to form an obtuse angle. Similarly, between the first emission surface 51g and the first emission surface 51c, the first emission surface 51h is formed adjacently so as to form an obtuse angle. Further, a second emission surface 51e facing the incidence surface 51a and inclined at a predetermined angle with respect to the normal direction of the incidence surface 51a and a second emission surface 51f parallel to the incidence surface 51a are adjacent to each other. Is formed. The substantially trapezoidal trapezoidal shape related to the light guide plate 51 is formed as a pair so as to face each other. The same applies to the light guide plate 52 as to the substantially trapezoidal trapezoidal shape formed as a pair so as to be the same face to face with respect to the light guide plate 51.

  Similarly, with respect to the light guide section 50, a concave connection cutout 51j is formed below the first light exit surface 51g of the light guide plate 51. Protrusions 43b formed at both ends of the holding member 43 are inserted into the connecting cutout 51j. Similarly, a concave connection notch 52j is formed below the first light exit surface 52g of the light guide plate 52. In such a connection cutout 52j, a connection cutout 43a opened at the center of the holding member 43 is inserted. Here, the light guide plate 51 is arranged such that the concave notch surface 51m provided at the center of the light exit surface of the light guide plate 51 and the concave notch surface 52k provided at the center of the incident surface 52a of the light guide plate 52 abut. And the light guide plate 52 is combined. In addition, when the notch surface 51m of the light guide plate 51 and the notch surface 52k of the light guide plate 52 are joined, the light guide plate 51 so that the incident surface 51a of the light guide plate 51 and the incident surface 52a of the light guide plate 52 are located on the same plane. 51 and a light guide plate 52 are formed. The convex contact surfaces 51n provided at both ends and the center of the incident surface 51a of the light guide plate 51 and the convex contact surfaces 52n provided at both ends of the incident surface 52a of the light guide plate 52 are respectively provided as light sources. It abuts on the substrate 32 of the portion 30.

  Next, details of the configuration and optical characteristics of the light guide 50 provided in the illumination device 1 will be specifically described with reference to FIGS. 3 to 8.

  In the description of the optical characteristics related to the light guide unit 50, first, basic optical characteristics of each light guide plate provided in the light guide unit 50 will be described with reference to the light guide plate 100 shown in FIG. Next, a configuration and optical characteristics of the light guide plate 51 formed in a substantially trapezoidal trapezoidal shape provided in the light guide unit 50 will be described with reference to FIGS. 4 to 6.

  First, basic optical characteristics of each light guide plate provided in the light guide unit 50 will be specifically described with reference to the light guide plate 100 shown in FIG. As shown in FIG. 3A, when the light L1 is incident on the emission surface 100z of the light guide plate 100 at an incident angle θ1 equal to or less than the critical angle, the light L2 corresponding to the transmitted light of the light L1 is emitted. It is emitted at θ2. Here, a value obtained by multiplying the refractive index n1 of the light guide plate 100 by sin (incidence angle θ1) and a value obtained by multiplying the refractive index n2 of air by sin (exit angle θ2), for example, are equal. Further, as shown in FIG. 3B, when the light L3 is incident on the emission surface 100z of the light guide plate 100 at an incident angle θ3 exceeding the critical angle, light corresponding to the total reflected light of the light L3. L4 is reflected inside the light guide plate 100 at a reflection angle θ4. Here, the incident angle θ3 and the reflection angle θ4 are equal. Further, the refractive index depends on the wavelength, and becomes relatively small from a short wavelength to a long wavelength. Therefore, the critical angle of light, which is the minimum incident angle at which incident light is totally reflected, depends on the wavelength and incident angle of the light.

  Next, a configuration related to the light guide plate 51 formed in a substantially trapezoidal trapezoidal shape provided in the light guide unit 50 will be specifically described with reference to FIGS. 4 to 6. The light guide plate 51 shown in FIG. 4 is formed in a substantially trapezoidal trapezoidal shape, and corresponds to one side of the light guide plate 51 shown in FIG. Specifically, as shown in FIG. 4A, the light guide plate 51 has an incident surface 51 a on which light from the light source 31 is incident at a position facing the light source 31. Further, a first emission surface 51p and a first emission surface 51s intersecting with the incident surface 51a are formed to face each other. Further, a second emission surface 51q facing the incidence surface 51a and inclined at a predetermined angle with respect to the normal direction of the incidence surface 51a and a second emission surface 51r parallel to the incidence surface 51a are adjacent to each other. Is formed. Furthermore, as shown in FIG. 4B, the light guide plate 51 is formed with a first exit surface 51b and a first exit surface 51c that intersect the entrance surface 51a facing each other. Further, the first emission surface 51u is formed adjacent to the first emission surface 51b and the first emission surface 51s so as to form an obtuse angle. Similarly, between the first emission surface 51c and the first emission surface 51s, the first emission surface 51t is formed adjacently so as to form an obtuse angle.

  Further, the optical characteristics of the light guide plate 51 formed in a substantially trapezoidal trapezoidal shape provided in the light guide unit 50 will be specifically described with reference to FIGS. 5 and 6. 5A to 5D are schematic diagrams individually showing optical characteristics at predetermined light emission locations on each emission surface in FIG. Here, as shown in FIG. 5, the light source 31 includes, for example, a surface light source in which a plurality of light emitters are provided adjacent to each other, and is provided directly below the incident surface 51 a of the light guide plate 51 that constitutes the light guide unit 50. Yes. Accordingly, light from the light source 31 enters the light guide plate 51 from almost the entire incident surface 51 a of the light guide plate 51. However, if a large number of light rays related to the light from the light source 31 are superimposed on the outline of the light guide plate 51 shown in FIGS. 4 and 5, it becomes difficult to understand the optical characteristics of the light guide plate 51. Therefore, in FIG. 4 and FIG. 5, the light rays related to the light from the light source 31 are shown in the form of being superimposed on the outline of the light guide plate 51 with reference to the light emission locations related to any four locations. In the light emission portion 51v of the second emission surface 51r shown in FIG. 5A, the light L101 that travels straight from the incident surface 51a in the normal direction and is perpendicularly incident on the second emission surface 51r is the light L101. The light L102 corresponding to the transmitted light is derived from the light guide plate 51. In addition, at the light emission location 51v, the light L112 incident at a critical angle or less with respect to the second emission surface 51r is led out from the light guide plate 51 as light L113 corresponding to the transmitted light of the light L112. The light L112 corresponds to the reflected light of the light L111 on the first emission surface 51s. Similarly, at the light emission location 51v, the light L121 incident at a critical angle or less with respect to the second emission surface 51r is led out from the light guide plate 51 as light L122 corresponding to the transmitted light of the light L121.

  Similarly, regarding the optical characteristics related to the light guide plate 51 provided in the light guide unit 50, the light exits 51w on the second exit surface 51q shown in FIG. 5B travel straight from the entrance surface 51a in the normal direction. The light L131 that has entered the second emission surface 51q at a critical angle or less is derived from the light guide plate 51 as light L132 that corresponds to the transmitted light of the light L131. In addition, at the light emission location 51w, the light L142 incident on the second emission surface 51q at a critical angle or less is led out from the light guide plate 51 as light L143 corresponding to the transmitted light of the light L142. The light L142 corresponds to the reflected light of the light L141 on the first emission surface 51s. Similarly, at the light emission location 51w, the light L151 incident on the second emission surface 51q beyond the critical angle is reflected inside the light guide plate 51 as light L152 corresponding to the reflected light of the light L151. The Further, the light L152 is reflected inside the light guide plate 51 as light L153 corresponding to the reflected light of the light L152 on the second emission surface 51r. The light L153 is led out from the first emission surface 51s of the light guide plate 51 as light L154 corresponding to the transmitted light of the light L153. In addition, since the light L161 is incident on the first emission surface 51p at an angle less than the critical angle, the light L161 is derived from the light guide plate 51 as light L162 corresponding to the transmitted light of the light L161, and the second emission surface 51q. It is not propagated to the light emission location 51w.

  Further, regarding the optical characteristics related to the light guide plate 51 provided in the light guide section 50, the critical angle with respect to the second output surface 51q at the light output location 51x of the second output surface 51q shown in FIG. 5C. Incoming light L171 and light L181 are led out from the light guide plate 51 as light L172 and light L182 corresponding to transmitted light, respectively. The light L171 is light that travels straight from the incident surface 51a in the normal direction. Similarly, at the light emission location 51x, the light L192 incident on the second emission surface 51q beyond the critical angle is reflected inside the light guide plate 51 as light L193 corresponding to the reflected light of the light L192. The The light L192 corresponds to the reflected light of the light L191 on the first emission surface 51p. The light L193 is derived from the first emission surface 51s of the light guide plate 51 as light L194 corresponding to the transmitted light of the light L193. In addition, since the light L201 is incident on the first emission surface 51s at an angle less than the critical angle, the light L201 is derived from the light guide plate 51 as light L202 corresponding to the transmitted light of the light L201, and the second emission surface 51q. The light is not propagated to the light exit location 51x.

  Similarly, regarding the optical characteristics related to the light guide plate 51 provided in the light guide section 50, the light exit location 51y of the second exit surface 51q shown in FIG. 5D is critical to the second exit surface 51q. Light L211, light L231, and light L241 incident at an angle or less are derived from the light guide plate 51 as light L212, light L232, and light L242 corresponding to transmitted light, respectively. The light L211 is light that travels straight in the normal direction from the incident surface 51a. At the light exit location 51y, the light L222 that has entered the second exit surface 51q beyond the critical angle is reflected inside the light guide plate 51 as light L223 corresponding to the reflected light of the light L222. . The light L222 corresponds to the reflected light of the light L221 on the first emission surface 51p. The light L223 is derived from the first emission surface 51s of the light guide plate 51 as light L224 corresponding to the transmitted light of the light L223.

  Furthermore, regarding the optical characteristics related to the light guide plate 51 provided in the light guide section 50, as shown in FIG. 6, it is formed between the first exit surface 51s, the first exit surface 51c and the first exit surface 51s. The light L251, the light L261, incident on the first emission surface 51t and the first emission surface 51u formed between the first emission surface 51b and the first emission surface 51s at a critical angle or less. And light L271 are led out from the light guide plate 51 as light L252, light L262, and light L272 corresponding to transmitted light, respectively.

  Therefore, according to the light guide plate 51 provided in the light guide section 50, the light of the light source 31 incident from the incident surface 51a of the light guide plate 51 is caused to enter the inside of the light guide plate 51 as shown in FIGS. Without being attenuated by multiple reflection, it can be derived from each exit surface at a predetermined radiation angle. Specifically, by providing the light guide plate 51 with a second emission surface 51q composed of a plane inclined at a predetermined angle with respect to the normal direction of the incident surface 51a of the light guide plate 51, for example, The light from the light source 31 can be derived at various emission angles at the light exit location 51w, the light exit location 51x, and the light exit location 51y on the exit surface 51q. Further, the light guide plate 51 includes, for example, a first emission surface 51t formed so as to form an obtuse angle between the first emission surface 51c and the first emission surface 51s, and the first emission surface 51b and the first emission surface 51b. By providing the first emission surface 51u formed so as to form an obtuse angle between the emission surfaces 51s, the angle of the light incident on each first emission surface from the inside of the light guide plate 51 is likely to be a critical angle, It becomes easy to lead out from the light guide plate 51.

  Further, a configuration and optical characteristics according to a modification of the light guide unit 50 provided in the lighting device 1 will be specifically described with reference to FIGS. 7 to 12.

  First, the configuration and optical characteristics of the light guide plate 53 formed in a polyhedral shape including a curved surface provided in the light guide unit 50 will be described with reference to FIGS. 7 to 10. Further, regarding the configuration and optical characteristics of the light guide plate 54 formed in a polyhedral shape by connecting a plurality of planes so that the angle formed with the incident surface from the center to the outside provided in the light guide portion 50 increases stepwise. This will be described with reference to FIG. Finally, the configuration and optical characteristics of the light guide plate 55 formed in a polyhedral shape by connecting a plurality of planes so that the angle formed with the incident surface from one side to the other provided in the light guide unit 50 increases stepwise. Will be described with reference to FIG.

  A configuration related to the light guide plate 53 formed in a polyhedral shape including a curved surface will be specifically described with reference to FIG. The light guide plate 53 shown in FIG. 7 is formed in a polyhedral shape including a curved surface, and is, for example, a light guide plate corresponding to one side of the light guide plate 51 shown in FIG. Specifically, as shown in FIG. 7, the light guide plate 53 has an incident surface 53 a on which light from the light source 31 is incident at a position facing the light source 31. Further, a first emission surface 53p and a first emission surface 53s intersecting with the incident surface 53a are formed to face each other. In addition, a second emission surface 53q facing the incidence surface 53a and inclined at a predetermined angle with respect to the normal direction of the incidence surface 53a and a second emission surface 53r made of a curved surface are formed adjacent to each other. ing. The configuration of the light guide plate 51 shown in FIG. 6 may be applied to the light guide plate 53 shown in FIG.

  In addition, regarding a modification of the light guide unit 50, the optical characteristics of the light guide plate 53 will be specifically described with reference to FIGS. FIGS. 8A to 8D are schematic diagrams individually showing optical characteristics at predetermined light emission locations on each emission surface in FIG. Here, similarly to the light guide plate 51, when a large number of light rays related to the light from the light source 31 are superimposed on the outline of the light guide plate 53 shown in FIGS. 7 and 8, the optical characteristics of the light guide plate 53 can be understood. It becomes difficult. Therefore, in FIGS. 7 and 8, the light rays related to the light from the light source 31 are illustrated by being superimposed on the outline of the light guide plate 53 with reference to the light emission locations of any four locations. In the light emission portion 53v of the second emission surface 53r shown in FIG. 8A, the light L321 and the light L331 incident on the second emission surface 53r at a critical angle or less are respectively light corresponding to transmitted light. L322 and light L332 are derived from the light guide plate 53. In addition, at the light emission point 53v, the light L311 that travels straight in the normal direction from the incident surface 53a and enters the second emission surface 53r beyond the critical angle is the light L312 corresponding to the reflected light of the light L311. Is reflected inside the light guide plate 53. Further, the light L312 is incident on the second emission surface 53r beyond the critical angle, and is reflected inside the light guide plate 53 as light L313 corresponding to the reflected light of the light L312. The light L313 is derived from the second emission surface 53q of the light guide plate 53 as light L314 corresponding to the transmitted light of the light L313.

  Similarly, regarding the modified example of the light guide unit 50, the optical characteristics of the light guide plate 53 are compared with the second output surface 53r at the light output location 53w of the second output surface 53r shown in FIG. The light L341, the light L352, the light L361, and the light L372 incident at a critical angle or less are derived from the light guide plate 53 as light L342, light L353, light L362, and light L373 corresponding to transmitted light, respectively. The light L341 is light that travels straight from the incident surface 53a in the normal direction. The light L352 corresponds to the reflected light of the light L351 on the second emission surface 53q. Similarly, the light L372 corresponds to the reflected light of the light L371 on the first emission surface 53p. In addition, at the light emission point 53w, the light L382 incident on the second emission surface 53r beyond the critical angle is reflected inside the light guide plate 53 as light L383 corresponding to the reflected light of the light L382. . The light L382 corresponds to the reflected light of the light L381 on the first emission surface 53r. The light L383 is derived from the second emission surface 53q of the light guide plate 53 as light L384 corresponding to the transmitted light of the light L383.

  Similarly, regarding the modification of the light guide 50, the optical characteristics of the light guide plate 53 are as follows. The light exit location 53x of the second exit surface 53q shown in FIG. Then, the light L401 incident below the critical angle is led out from the light guide plate 53 as light L402 corresponding to the transmitted light. In addition, at the light emission point 53x, the light L391 that travels straight from the incident surface 53a in the normal direction and enters the second emission surface 53q beyond the critical angle is the light L392 corresponding to the reflected light of the light L391. Is reflected inside the light guide plate 53. The light L392 is derived from the second emission surface 53r of the light guide plate 53 as light L393 corresponding to the transmitted light of the light L392. In addition, since the light L411 is incident on the first emission surface 53s at an angle less than the critical angle, the light L411 is derived from the light guide plate 53 as light L412 corresponding to the transmitted light of the light L411, and the second emission surface 53q. The light is not propagated to the light emission portion 53x.

  Similarly, regarding the modified example of the light guide unit 50, with respect to the optical characteristics of the light guide plate 53, the light exit location 53y of the second exit surface 53q shown in FIG. Then, the light L431 and the light L441 incident at a critical angle or less are led out from the light guide plate 53 as light L432 and light L442 corresponding to transmitted light, respectively. In addition, at the light exit location 53y, the light L421 that travels straight from the incident surface 53a in the normal direction and enters the second exit surface 53q beyond the critical angle is the light L422 corresponding to the reflected light of the light L421. Is reflected inside the light guide plate 53. The light L422 is derived from the second emission surface 53r of the light guide plate 53 as light L423 corresponding to the transmitted light of the light L422.

  Therefore, regarding the modification of the light guide unit 50, according to the light guide plate 53, as shown in FIGS. 7 and 8, the light of the light source 31 incident from the incident surface 53 a of the light guide plate 53 is transmitted to the light guide plate 53. Without being attenuated by multiple reflection inside, it can be derived from each exit surface at a predetermined radiation angle. Specifically, the light guide plate 53 includes a second output surface 53q formed of a plane inclined at a predetermined angle with respect to the normal direction of the incident surface 53a of the light guide plate 53, and a second output surface formed of a curved surface. By providing 53r adjacently, the light of the light source 31 can be derived | led-out by various radiation | emission angles in the light emission location 53v thru | or the light emission location 53y, for example. Furthermore, for example, the light emitted from the light source 31 reflected by the light emission point 53v and the light emission point 53w on the second emission surface 53r formed of a curved surface is a second emission composed of a plane adjacent to the second emission surface 53r. It can be derived from the surface 53q at various radiation angles. Further, for example, the light emitted from the light source 31 reflected by the light exit location 53x and the light exit location 53y on the second exit surface 53q, which is a flat surface, is emitted from the curved surface adjacent to the second exit surface 53q. It can be derived from the surface 53r at various radiation angles.

  Furthermore, a configuration for expanding the light distribution of the light derived from the illumination device 1 in an arc shape with respect to the outer side in the radial direction of the housing 40 will be described in detail with reference to FIGS. 9 and 10. . The light guide plate 57 shown in FIG. 9 corresponds to an application example in which the light guide plate 53 shown in FIG. 7 is combined in a cross shape, or an application example in which the light guide plate 53 is integrally formed in a cross shape. Such a light guide plate 57 includes first emission surfaces 57s and 57p which are adjacent to and orthogonal to the incident surface 57a. Here, the first emission surface 57s is disposed on the outer side in the radial direction of the housing portion 40, and the first emission surface 57p is located on the center side of the housing portion 40 so as to face the first emission surface 57s. Arranged. The light guide plate 57 includes second emission surfaces 57r and 57q facing the incident surface 57a. Here, the second emission surface 57r is formed of a curved surface and is provided on the outer side in the radial direction of the housing portion 40. The second emission surface 57q is formed from a plane inclined at a predetermined angle with respect to the normal direction of the incident surface 57a, and is provided on the center side of the housing portion 40. Further, the position 57z where the second emission surface 57r and the second emission surface 57q are in contact with each other is furthest away from the light source 31 of the light source unit 30 in the orthogonal direction.

  When the light guide plate 57 is made of an acrylic resin, the typical critical angle of light in visible light is about 42 °. Therefore, the second emission surface 57q is provided adjacent to the first emission surface 57p so as to have an angle exceeding the critical angle of such light, and is incident on the second emission surface 57q of the light guide plate 57. The reflected light is reflected in the direction of the second emission surface 57r. Furthermore, in the light guide plate 57, the position 57y where the second emission surface 57q and the first emission surface 57p are in contact is compared with the position 57x where the second emission surface 57r and the first emission surface 57s are in contact. Since it is close to the incident surface 57a, the light incident from the incident surface 57a is easily propagated in the direction of the second output surface 57r after being reflected by the second output surface 57q. In addition, in the light guide plate 57 shown in FIG. 9 and FIG. A total of 13 light sources 31 are arranged in a cross shape on the substrate 32 of the light source unit 30. Here, as shown in FIGS. 9 and 10, the seven light sources 31a to 31g are separated by a predetermined distance in a line so as to face the incident surface 57a of the light guide plate 57 formed in a cross shape. Is provided.

  In FIG. 10, the schematic diagram regarding the optical characteristic of the light-guide plate 57 is shown. However, when all of a plurality of lights emitted from the respective light sources 31 at various angles are illustrated, only the representative lights are shown because the lights are dense and cannot be discriminated. In addition, the lights L801 to L812 illustrated in FIG. 10 are reflected by at least the second emission surface 57q and transmitted through the first emission surface 57s after passing through the incident surface 57a among the light emitted from the respective light sources 31. It is transmitted to the outside. Specifically, the light L801 to the light L806 shown in the left half region of the light guide plate 57 shown in FIG. 10 are transmitted through the incident surface 57a, reflected by the second output surface 57q, and transmitted through the first output surface 57s. The light is led out to the outside. Further, the light L807 shown in the right half region of the light guide plate 57 shown in FIG. 10 is transmitted through the incident surface 57a and reflected by the first output surface 57q, and then reflected by the second output surface 57q and the first output. The light is transmitted to the outside through the surface 57s. Similarly, the light L808 through the light L812 shown in the right half region of the light guide plate 57 shown in FIG. 10 are transmitted through the incident surface 57a, reflected by the first output surface 57s, and then reflected by the second output surface 57q. The light is transmitted to the outside through the first emission surface 57s. In addition, by sorting and displaying the light propagating through the light guide plate 57 in the left half region and the right half region in FIG. 10, it is avoided that the light overlaps and becomes difficult to recognize.

  Therefore, as shown in the left half region in FIG. 10, the light guide plate 57 allows the light from the light source that has passed through the incident surface 57 a to be emitted from the second emission surface 57 q disposed on the center side of the housing 40. It is reflected and easily transmitted through the second emission surface 57r disposed on the outer side in the radial direction of the casing 40. Similarly, as shown in the right half region in FIG. 10, the light guide plate 57 is arranged such that the light reflected by the first emission surface 57 s or the first emission surface 57 p is arranged on the center side of the housing unit 40. After being reflected by the provided second emission surface 57q, it is easy to be transmitted through the second emission surface 57r disposed on the outer side in the radial direction of the casing 40. Here, the light emitted from the second emission surface 57r formed from a curved surface has a substantially arc shape due to the lens effect. As described above, by using the light guide plate 57, the light distribution of the light derived from the lighting device 1 is expanded in an arc shape with respect to the outer side in the radial direction of the housing portion 40. It is possible to approximate the light distribution characteristics of a simple lamp light source.

  Next, regarding a modification of the light guide unit 50, a configuration related to the light guide plate 54 formed in a polyhedral shape by connecting a plurality of planes so that the angle formed with the incident surface increases stepwise from the center toward the outside. Will be described in detail with reference to FIG. Here, similarly to the light guide plate 51 and the light guide plate 53, when a large number of light rays related to the light of the light source 31 are superimposed on the outline of the light guide plate 54 shown in FIG. 11, the optical characteristics of the light guide plate 54 are understood. Difficult to do. Therefore, in FIG. 11, the light rays related to the light from the light source 31 are illustrated in such a manner that the light rays are overlapped on the outline of the light guide plate 54 with reference to the light emission locations at any four locations. The light guide plate 54 shown in FIG. 11 is formed in a polyhedral shape by connecting a plurality of planes so that the angle formed with the incident surface increases stepwise from the center toward the outside. For example, the light guide plate 51 of the light guide plate 51 shown in FIG. A light guide plate corresponding to one side. Specifically, as shown in FIG. 11, the light guide plate 54 has an incident surface 54 a on which light from the light source 31 is incident at a position facing the light source 31. Moreover, the 1st output surface 54p which cross | intersected the entrance plane 54a is formed facing the left and right of FIG. Further, for example, a second exit surface 54q inclined by 10 °, a second exit surface 54r inclined by 15 °, and a second exit surface inclined by 20 ° with respect to the normal direction of the entrance surface 54a. Two outgoing surfaces 54s and a second outgoing surface 54t inclined by 25 ° are connected in series and face each other. Furthermore, a second exit surface 54u that faces the entrance surface 54a and is parallel to the entrance surface 54a is formed adjacent to the second exit surface 54t. The configuration of the light guide plate 51 shown in FIG. 6 may be applied to the light guide plate 54 shown in FIG.

  In addition, regarding the modification of the light guide 50, the optical characteristics of the light guide plate 54 are as follows. In the light emission portion 54v of the second emission surface 54q shown in FIG. 11, the second emission surface 54q shown on the left side of FIG. The light L521 incident at a critical angle or less is derived from the light guide plate 54 as light L522 corresponding to the transmitted light of the light L521. In addition, at the light emission portion 54v, the light L511 that has entered the second emission surface 54q beyond the critical angle is reflected inside the light guide plate 54 as light L512 corresponding to the reflected light of the light L511. . Further, the light L512 is derived from the second emission surface 54u of the light guide plate 54 as light L513 corresponding to the transmitted light of the light L512. Similarly, with respect to the light emission portion 54w of the second emission surface 54r, the light emission location 54x of the second emission surface 54s, and the light emission location 54y of the second emission surface 54t shown on the left side of FIG. Then, the light L541, the light L561, and the light L582 that are respectively incident at a critical angle or less are led out from the light guide plate 54 as light L542, light L562, and light L583 corresponding to transmitted light, respectively. The light L582 corresponds to the reflected light of the light L581 on the first emission surface 54p shown on the right side of FIG.

  Similarly, regarding the modification of the light guide 50, the optical characteristics of the light guide plate 54 are as follows. The light emission location 54v of the second emission surface 54q and the light emission of the second emission surface 54r shown on the left side of FIG. The light L511, the light L531, the light L551, and the light L511, the light L551, and the light L551, which are incident on the light emission point 54x on the second light emission surface 54s and the light emission point 54y on the second light emission surface 54t, respectively. The light L571 is reflected inside the light guide plate 54 as light L512, light L532, light L552, and light L572 corresponding to reflected light, respectively. The light L511, the light L531, the light L551, and the light L571 are light that travels straight in the normal direction from the incident surface 54a. The light L512 is led out from the second emission surface 54u of the light guide plate 54 as light L513 corresponding to the transmitted light of the light L512. Further, the light L532, the light L552, and the light L572 are converted into light L533, light L553, and light L573 corresponding to the transmitted light of the light L532, light L552, and light L572, as shown in the right side of FIG. Derived from the second exit surface 54t.

  Therefore, regarding the modification of the light guide unit 50, according to the light guide plate 54, the light of the light source 31 incident from the incident surface 54a of the light guide plate 54 is multiplexed inside the light guide plate 54 as shown in FIG. Without being attenuated by reflection, it can be derived from each exit surface at a predetermined radiation angle. Specifically, the second emission surface 54q to the second emission surface 54t are sequentially formed on the light guide plate 54 so that the angle formed with the normal direction of the incidence surface increases from the center toward the outside in a stepwise manner. By being connected and formed to face each other, the light from the light source 31 is refracted so as to have a predetermined light distribution, and can be derived from each second emission surface at a predetermined radiation angle. Further, for example, the light of the light source 31 reflected by the second emission surface 54q to the second emission surface 54t formed on the left side of the light guide plate 54 in FIG. 11 is formed on the right side of the light guide plate 54 in FIG. Further, the light can be derived from the second emission surface 54t or the like at various radiation angles toward the front of the light guide plate 54.

  Next, regarding a modified example of the light guide unit 50, a configuration related to the light guide plate 55 formed in a polyhedral shape by connecting a plurality of planes so that the angle formed with the incident surface from one side to the other increases stepwise. Will be described in detail with reference to FIGS. Here, similarly to the light guide plate 51 to the light guide plate 54, when a large number of light rays related to the light of the light source 31 are superimposed on the outline of the light guide plate 55 shown in FIG. 12, the optical characteristics of the light guide plate 55 are understood. Difficult to do. Therefore, in FIG. 12, the light rays related to the light from the light source 31 are illustrated on the outer contour line of the light guide plate 55 on the basis of the light emission locations related to arbitrary four locations. The light guide plate 55 shown in FIG. 12A is formed in a polyhedron shape by connecting a plurality of planes so that the angle between the incident surface and the incident surface increases stepwise from one side to the other. For example, the light guide plate 55 shown in FIG. A light guide plate corresponding to one side of the light plate 51. Specifically, as shown in FIG. 12A, the light guide plate 55 has an incident surface 55 a on which light from the light source 31 is incident at a position facing the light source 31. Further, a first emission surface 55p and a first emission surface 55u intersecting with the incident surface 55a are formed to face each other. Further, the second exit surface 55q is opposed to the entrance surface 55a and is inclined by, for example, 10 °, the second exit surface 55r is inclined by 20 °, and is inclined by 30 ° with respect to the normal direction of the entrance surface 55a. The second emission surfaces 55s are formed in series and opposed to each other. Furthermore, a second exit surface 55t that faces the entrance surface 55a and is parallel to the entrance surface 55a is formed adjacent to the second exit surface 55s and the first exit surface 55u.

  In addition, regarding the modification of the light guide unit 50, as shown in FIG. 12B, the light guide plate 55 includes a first light exit surface 55b and a first light exit surface 55b that intersect with the light entrance surface 55a. The emission surface 55c is formed so as to oppose. Further, the first emission surface 55m is formed adjacent to the first emission surface 55b and the first emission surface 55u so as to form an obtuse angle. Similarly, the first emission surface 55n is formed adjacent to the obtuse angle between the first emission surface 55c and the first emission surface 55u.

  Further, regarding a modification of the light guide unit 50, the optical characteristics of the light guide plate 55 will be specifically described with reference to the respective drawings in FIG. The light emission location 55v of the second emission surface 55q, the light emission location 55w of the second emission surface 55r, and the light emission location 55x of the second emission surface 55s shown in FIG. Light L621, light L642, and light L663 that are incident at a critical angle or less are led out from the light guide plate 55 as light L622, light L643, and light L664 corresponding to transmitted light, respectively. The light L642 corresponds to the reflected light of the light L641 on the first emission surface 55u. Similarly, the light L663 corresponds to the reflected light of the light L662 on the first emission surface 55u, and the light L662 corresponds to the reflected light of the light L661 on the first emission surface 55p. In addition, the light L611 that has entered the light emission portion 55v of the second emission surface 55q beyond the critical angle is reflected inside the light guide plate 55 as light L612 corresponding to the reflected light of the light L611. The light L611 is light that travels straight from the incident surface 55a in the normal direction. Furthermore, the light L612 incident on the second emission surface 54s beyond the critical angle is reflected inside the light guide plate 55 as light L613 corresponding to the reflected light of the light L612. Further, the light L613 is derived from the second emission surface 55t of the light guide plate 55 as light L614 corresponding to the transmitted light of the light L613.

  Similarly, regarding the modification of the light guide section 50, the optical characteristics of the light guide plate 55 are critical with respect to the light emission location 55w of the second emission surface 55r and the light emission location 55x of the second emission surface 55s. The light L631 and the light L651 incident beyond the angle are reflected inside the light guide plate 55 as light L632 and light L652 corresponding to the reflected light of the light L631 and light L651. The light L631 and the light L651 are light that travels straight in the normal direction from the incident surface 55a. Further, the light L632 and the light L652 are derived from the second emission surface 55u of the light guide plate 55 as light L633 and light L653 corresponding to the transmitted light of the light L632 and light L652. Further, as shown in FIG. 12B, the first emission surface 55u, the first emission surface 55m formed between the first emission surface 55c and the first emission surface 55u, and the first emission surface. Light L671, light L681, and light L691 incident at a critical angle or less with respect to the first emission surface 55n formed between the surface 55b and the first emission surface 55u are respectively light L672 corresponding to transmitted light. The light L682 and the light L692 are led out from the light guide plate 55.

  Therefore, regarding the modification of the light guide section 50, according to the light guide plate 55, the light of the light source 31 incident from the incident surface 55a of the light guide plate 55 is multiplexed inside the light guide plate 55 as shown in FIG. Without being attenuated by reflection, it can be derived from each exit surface at a predetermined radiation angle. Specifically, the second light exit surface 55q to the second light exit surface 55s are sequentially formed on the light guide plate 55 so that the angle formed with the normal direction of the light entrance surface from one side to the other increases stepwise. By being connected and formed to face each other, the light from the light source 31 is refracted so as to have a predetermined light distribution, and can be derived from each second emission surface at a predetermined radiation angle. Further, for example, the light of the light source 31 reflected by the second emission surface 55q to the second emission surface 55s of the light guide plate 55 is forwarded from the second emission surface 55u of the light guide plate 55 to the front of the light guide plate 55. Can be derived at various radiation angles. Further, the light guide plate 55 includes, for example, a first emission surface 55c formed so as to form an obtuse angle between the first emission surface 55b and the first emission surface 55u, and the first emission surface 55c and the first emission surface 55c. By providing the first emission surface 55n formed so as to form an obtuse angle between the emission surfaces 55u, the angle of the light incident on the first emission surface from the inside of the light guide plate 55 is likely to be less than the critical angle. It becomes easy to lead out from the light guide plate 55.

  As described above, according to the illumination device 1 according to the first embodiment, for example, the light of the light source 31 incident from the incident surface 51a of the light guide plate 51 illustrated in FIG. 5 is attenuated by multiple reflection inside the light guide plate 51. Without any problem, the light can be derived from each emission surface at a predetermined radiation angle. Specifically, by providing the light guide plate 51 with a second emission surface 51q composed of a plane inclined at a predetermined angle with respect to the normal direction of the incident surface 51a of the light guide plate 51, for example, The light from the light source 31 can be derived at various emission angles at the light exit location 51w, the light exit location 51x, and the light exit location 51y on the exit surface 51q. Further, the light guide plate 51 includes, for example, a first emission surface 51t formed so as to form an obtuse angle between the first emission surface 51c and the first emission surface 51s, and the first emission surface 51b and the first emission surface 51b. By providing the first emission surface 51u formed so as to form an obtuse angle between the emission surfaces 51s, the angle of light incident on each first emission surface from the inside of the light guide plate 51 tends to become a critical angle. Therefore, it is easy to lead out from the light guide plate 51.

  Moreover, according to the illuminating device 1 which concerns on 1st Embodiment, the plane inclined by the predetermined angle with respect to the normal line direction of the entrance plane 53a of this light-guide plate 53 like the light-guide plate 53 shown, for example in FIG. By providing the second emission surface 53q made of and the second emission surface 53r made of a curved surface, for example, the light of the light source 31 is derived at various emission angles at the light emission location 53v to the light emission location 53y. Can be made. Furthermore, for example, the light emitted from the light source 31 reflected by the light emission point 53v and the light emission point 53w on the second emission surface 53r formed of a curved surface is a second emission composed of a plane adjacent to the second emission surface 53r. It can be derived from the surface 53q at various radiation angles. Further, for example, the light emitted from the light source 31 reflected by the light emission location 53x and the light emission location 53y of the second emission surface 53q, which is a flat surface, is emitted from the curved surface adjacent to the second emission surface 53r. It can be derived from the surface 53r at various radiation angles.

  Similarly, according to the illuminating device 1 which concerns on 1st Embodiment, for example like the light-guide plate 54 shown in FIG. 11, the angle which the normal line direction of an incident surface makes from the center toward the outer side becomes large in steps. As described above, the second emission surface 54q to the second emission surface 54t are connected in series and opposed to each other, whereby the light from the light source 31 is refracted so as to have a predetermined light distribution, It is possible to derive from the two exit surfaces with a predetermined radiation angle. Further, for example, the light of the light source 31 reflected by the second emission surface 54q to the second emission surface 54t formed on the left side of the light guide plate 54 in FIG. 11 is formed on the right side of the light guide plate 54 in FIG. Further, the light can be derived from the second emission surface 54t or the like at various radiation angles toward the front of the light guide plate 54.

  Similarly, according to the illuminating device 1 which concerns on 1st Embodiment, for example like the light-guide plate 55 shown in FIG. 12, the angle which the normal line direction of an entrance plane makes from one side toward the other becomes large in steps. As described above, the second emission surface 55q to the second emission surface 55s are connected in series and opposed to each other, whereby the light of the light source 31 is refracted so as to have a predetermined light distribution, It is possible to derive from the two exit surfaces with a predetermined radiation angle. Further, for example, the light of the light source 31 reflected by the second emission surface 55q to the second emission surface 55s of the light guide plate 55 is forwarded from the second emission surface 55u of the light guide plate 55 to the front of the light guide plate 55. Can be derived at various radiation angles. Further, the light guide plate 55 includes, for example, a first emission surface 55c formed so as to form an obtuse angle between the first emission surface 55b and the first emission surface 55u, and the first emission surface 55c and the first emission surface 55c. By providing the first emission surface 55n formed so as to form an obtuse angle between the emission surfaces 55u, the angle of light incident on each first emission surface from the inside of the light guide plate 55 becomes less than the critical angle. It becomes easy to lead out from the light guide plate 55.

  Moreover, according to the illuminating device 1 which concerns on 1st Embodiment, about the light guide plate provided in the light guide part 50, for example, the light guide plate 51 shown in FIG. 5, the light guide plate 53 shown in FIG. 8, and the guide shown in FIG. The shapes of the light plate 54 or the light guide plate 55 shown in FIG. 12 may be arbitrarily combined. Thus, the illuminating device 1 which has an optical characteristic different from the direction to visually recognize can be comprised by forming the light guide part 50 combining multiple light guide plates of a different shape.

[Second Embodiment]
Hereinafter, the lighting device 2 according to the second embodiment of the present invention will be specifically described with reference to FIGS. 13 to 18.

  In addition, the illuminating device 2 of the 2nd Embodiment of this invention has the characteristics in which the concave or convex pattern is formed in the light guide plate of the light guide part 60 which comprises this illuminating device 2, respectively. ing. Other configurations according to the second embodiment are the same as the configurations described in the first embodiment. Specifically, as illustrated in FIG. 14, the illumination device 2 of the second embodiment includes a power reception unit 10, a power supply unit 20, a light source unit 30 having the same specifications as the illumination device 1 of the first embodiment, And the housing | casing part 40 and the light guide part 60 peculiar to the illuminating device 2 of 2nd Embodiment are comprised. Therefore, in the second embodiment, the light guide unit 60 having a configuration different from that of the first embodiment will be mainly described.

  Each light guide plate of the light guide unit 60 constituting the illumination device 2 of the second embodiment has a concave or convex shape that guides the light from the light source unit 30 as diffused light to one or more of the light exit surfaces of the light guide plate. Pattern is formed. Here, the specification of the concave or convex pattern formed on each light guide plate provided in the light guide unit 60 will be described with reference to FIGS. 13 to 15. Next, the specifications of the concave or convex pattern formed on each light guide plate according to a modification of the light guide unit 60 will be described with reference to FIG. Further, optical characteristics relating to a special concave or convex pattern formed on each light guide plate according to a modification of the light guide 60 will be described with reference to FIGS. 17 and 18.

  First, the specification of the concave or convex pattern formed on each light guide plate provided in the light guide unit 60 will be specifically described with reference to FIGS. 13 to 15. The first light exit surface 61b and the first light exit surface 61c provided on the light guide plate 61 of the light guide section 60 have a concave shape that guides the emitted light as diffused light, as shown in FIGS. 13 and 14, for example. Pattern 61p is formed. Such patterns 61p are formed in a matrix at intervals of 1 mm to 6 mm, for example. Here, most of the plurality of diffused lights generated by the plurality of patterns 61p formed on the first light exit surface 61b of the light guide plate 61 are the first light beams that face the light guide plate 61 as substantially uniform surface emitting light. Derived from the exit surface 61c. Similarly, most of the plurality of diffused lights generated by the plurality of patterns 61p formed on the first light exit surface 61c of the light guide plate 61 are substantially uniform surface emitting light as the first light which the light guide plate 61 faces. Derived from the exit surface 61b. The specification of the concave pattern 62p formed on the light guide plate 62 of the light guide unit 60 is the same as the specification of the pattern 61p formed on the light guide plate 61 described above.

    In addition, regarding the specifications of the concave or convex pattern formed on each light guide plate provided in the light guide unit 60, the concave or convex pattern formed on each light exit surface of the light guide plate 61 and the light guide plate 62, for example, You may comprise from a shape, a linear form, or those combination. For example, a concave or convex pattern may be formed on the light guide plate 51 shown in FIG. 4, the light guide plate 53 shown in FIG. 7, the light guide plate 54 shown in FIG. 11, and the light guide plate 55 shown in FIG. . The outer shape of the light guide plate 61 provided in the light guide unit 60 shown in FIG. 14 is the same as the outer shape of the light guide plate 51 provided in the light guide unit 50 shown in FIG. Therefore, the light guide plate 61 provided in the light guide unit 60 has the same optical characteristics as the light guide plate 51 provided in the light guide unit 50 described with reference to FIGS. 5 and 6, and the incident surface of the light guide plate 61. The light of the light source 31 incident from 61a can be led out from each emission surface at a predetermined radiation angle without being attenuated by multiple reflection inside the light guide plate 61.

  Further, regarding the specifications of the concave or convex pattern formed on each light guide plate provided in the light guide unit 60, FIG. 15 shows the first light exit surface of each light guide plate in order to facilitate understanding of the invention. The size of the formed concave pattern is exaggerated. Here, like the light guide plate 61 shown in FIG. 15, the light of the light source 31 incident from the incident surface 61 a of the light guide plate 61 is applied to the pattern 61 p formed on the first emission surface 61 b of the light guide plate 61. Then, diffused light is generated. Most of the diffused light is led out from the first emission surface 61c provided to face the first emission surface 61b. Here, if the pattern 61p is not provided on the light guide plate 61, each first exit surface intersecting the entrance surface 61a of the light guide plate 61 is different from each second exit surface facing the entrance surface 61a of the light guide plate 61. In comparison, the amount of light of the light source 31 directly derived from the light guide plate 61 is considerably small. However, by providing, for example, a concave pattern on an arbitrary first emission surface that intersects with the incident surface 61a of the light guide plate 61, diffused light is derived from the first emission surface that faces the arbitrary first emission surface. Can be made. Therefore, since the difference in the amount of light derived from each of the first emission surface and each second emission surface of the light guide plate 61 is suppressed, the light is derived from a plurality of emission surfaces provided on the light guide plate 61. The amount of light to be averaged can be averaged. In addition, when the pattern 61p of the light guide plate 61 is formed so as not to face the first light exit surface 61b and the first light exit surface 61c of the light guide plate 61, the light guide plate is compared with a case where the patterns face the same. Since the total number of the patterns 61p visible from the first emission surface 61b or the first emission surface 61c of 61 increases, the difference in brightness of the diffused light derived from the light guide plate 61 is reduced.

  Next, the specification of the concave or convex pattern formed on each light guide plate according to a modification of the light guide unit 60 will be specifically described with reference to FIG. Like the light guide plate 62 shown in FIG. 16A, the light of the light source 31 incident from the incident surface 62 a of the light guide plate 62 is irradiated to the pattern 62 p formed on the first emission surface 62 b of the light guide plate 62. Then, diffused light is generated. Most of the diffused light is led out from the first emission surface 61c provided to face the first emission surface 62b. That is, the pattern 62p may be provided on any one of the first emission surfaces. Further, regarding the optical characteristics related to the concave or convex pattern formed on each light guide plate provided in the light guide unit 60, the depth of the pattern 64p is guided as in the light guide plate 64 shown in FIG. It is good also as a structure deepened relatively every time it leaves | separates from the entrance plane 64a of the light-guide plate 64 with respect to the 1st exit surface 64b and the 1st exit surface 64c of the optical plate 64. FIG. When the depth of the pattern 64p is increased in this way, the surface area of the pattern 64p is increased, so that relatively large diffused light is generated. On the other hand, the light intensity of the light source 31 is attenuated and relatively lowered as the distance from the incident surface 64a of the light guide plate 64 increases. Therefore, by adopting the configuration as described above, the intensity of the diffused light derived from the first emission surface 64b and the first emission surface 64c of the light guide plate 64 is set to the distance from the incidence surface 64a of the light guide plate 64. It can be averaged without approaching. In addition, it is good also as a structure which makes relatively high the height of the convex pattern formed in the 1st output surface of the light-guide plate which is not shown in figure, whenever it distances from the entrance plane of a light-guide plate. Similarly, the interval between the concave or convex patterns formed on the first light exit surface of the light guide plate (not shown) may be made relatively dense every time the light guide plate moves away from the light entrance surface. Even with this configuration, the intensity of the diffused light derived from the first light exit surface of the light guide plate can be averaged.

  Further, the optical characteristics related to the special concave or convex pattern formed on each light guide plate according to the modification of the light guide unit 60 will be specifically described with reference to FIGS. 17 and 18. Like the light guide plate 65, a concave pattern made of a quadrangular pyramid has a rectangular surface at the bottom, so that diffused light is efficiently derived from the first emission surface 65b and the first emission surface 65c. Can be made. Specifically, a part of the light incident from the incident surface 65a is irradiated to the lowermost portion 65f of the pattern 65d formed on the first output surface 65b, for example, in the direction away from the incident surface 65a and the first Is reflected on the exit surface 65c side. Similarly, a part of the light incident from the incident surface 65a is irradiated to, for example, the lowermost portion 65i of the pattern 65e formed on the first output surface 65c, is in a direction away from the incident surface 65a, and the first output. Reflected to the surface 65b side. Therefore, the light incident from the incident surface 65a can be converted into diffused light more efficiently and led out from the first output surface 65b and the first output surface 65c.

  In addition, regarding the optical characteristics related to the special concave or convex pattern formed on each light guide plate according to the modification of the light guide unit 60, if the concave pattern is a pure quadrangular pyramid shape, the quadrangular pyramid The diffused light generated in the vicinity of the lowermost part has a very short distance from one surface 65g to the opposite other surface 65h at the tip part, so that the diffused light is greatly attenuated by multiple reflections in the vicinity of the lowermost part. It is not derived directly from the first exit surface 65b or the first exit surface 65c. On the other hand, when the concave pattern has a rectangular surface at the lowermost part of the quadrangular pyramid, the diffused light generated in the vicinity of the lowermost part of the quadrangular pyramid is on the other surface 65h facing the one surface 65g in the vicinity of the lowermost pyramid. Since there is a certain distance between them, the light is derived directly from the first exit surface 65b or the first exit surface 65c before being subjected to multiple reflection. Therefore, the light incident from the incident surface 65a can be derived more efficiently.

  As mentioned above, according to the illuminating device 2 which concerns on 2nd Embodiment, the effect similar to the illuminating device 1 which concerns on 1st Embodiment mentioned above can be acquired. Specifically, for example, the light guide plate 61 provided in the light guide unit 60 has the same optical characteristics as the light guide plate 51 provided in the light guide unit 50 described with reference to FIGS. The light of the light source 31 incident from the incident surface 61a of the light plate 61 can be derived from each emitting surface at a predetermined radiation angle without being attenuated by multiple reflection inside the light guide plate 61.

  Furthermore, according to the illuminating device 2 which concerns on 2nd Embodiment, like the light guide plate 63 shown to Fig.16 (a), light guide plate 63p is formed in the pattern 63p formed in the 1st output surface 63b of the light guide plate 63. FIG. The diffused light can be generated by irradiating the light of the light source 31 incident from the incident surface 63a of 63, and the diffused light can be led out from the first emission surface 63c. Therefore, according to the illuminating device 2 which concerns on 2nd Embodiment, the diffused light by which the glare was suppressed can be used as substantially uniform surface emitting light. If the light guide plate 63 is not provided with the pattern 63p, each first exit surface intersecting the entrance surface 63a of the light guide plate 63 is compared with each second exit surface facing the entrance surface 63a of the light guide plate 63. Thus, the amount of light of the light source 31 directly derived from the inside of the light guide plate 61 is considerably small. However, by providing, for example, a concave pattern on an arbitrary first exit surface that intersects the entrance surface 63a of the light guide plate 63, diffused light is derived from the first exit surface that faces the first exit surface. Can be made. Therefore, the difference in the amount of light derived from each of the first emission surfaces and each of the second emission surfaces of the light guide plate 63 is suppressed, so that the light is derived from the plurality of emission surfaces provided on the light guide plate 63. The amount of light to be averaged can be averaged.

  Moreover, according to the illuminating device 2 which concerns on 2nd Embodiment, like the light-guide plate 61 shown in FIG. 15, the pattern 61p is made with respect to the 1st output surface 61b and the 1st output surface 61c of the light-guide plate 61. FIG. Accordingly, the total number of the patterns 61p visible from the first emission surface 61b or the first emission surface 61c of the light guide plate 61 can be increased. Therefore, according to the illuminating device 2 which concerns on 2nd Embodiment, the diffused light by which the glare was suppressed and the difference in brightness was suppressed can be used as substantially uniform surface emitting light.

  Similarly, according to the illuminating device 2 according to the second embodiment, as the light guide plate 64 shown in FIG. 16B, the light intensity of the light source 31 is attenuated every time the light source 31 moves away from the incident surface 64a. In consideration of this, the depth of the pattern 64p is relatively increased every time the distance from the incident surface 64a of the light guide plate 64 is increased with respect to the first output surface 64b and the first output surface 64c of the light guide plate 64. With the configuration, relatively large diffused light can be generated. Therefore, according to the illuminating device 2 which concerns on 2nd Embodiment, the diffused light by which the glare was suppressed and the difference in brightness was suppressed was averaged irrespective of the distance from the entrance plane 64a of the light-guide plate 64. It can be used as light for simple surface emission.

  Similarly, according to the illuminating device 2 according to the second embodiment, the height of the convex pattern formed on the first light exit surface of the light guide plate is relatively increased every time it is moved away from the light entrance surface of the light guide plate. The interval of the concave or convex pattern formed on the first light exit surface of the light guide plate can be made relatively dense every time the light guide plate is moved away from the incident surface. Therefore, according to the illuminating device 2 which concerns on 2nd Embodiment, the uniform surface which averaged the diffused light by which the glare was suppressed and the difference of brightness was suppressed irrespective of the distance from the entrance plane of a light-guide plate. It can be used as emitted light.

  Next, the manufacturing method of the light-guide plate provided in the illuminating device 2 of the 2nd Embodiment of this invention is demonstrated concretely.

  For example, ultrasonic processing, heating processing, cutting processing, laser processing, molding processing, and silk printing processing can be used for the method of manufacturing the light guide plate. Therefore, by selecting each processing method according to the specification, cost, required quantity, etc. of the light guide plate, a concave or convex pattern can be formed on the main surface of the light guide plate with high accuracy and stability. Hereinafter, each manufacturing method will be described. In ultrasonic processing, the main surface of the light guide plate is partially melted by using ultrasonic vibration of an ultrasonic processing horn brought into contact with the main surface of the light guide plate, thereby forming a concave pattern on the main surface. Form. In the heating process, the main surface of the light guide plate is partially melted using the heat of the processing tool brought into contact with the main surface of the light guide plate, thereby forming a concave pattern on the main surface. Similarly, in the cutting process, a concave pattern is formed on the main surface by partially scraping off the main surface of the light guide plate using a cutting tool that is rotated or biased while being in contact with the main surface of the light guide plate. To do. Similarly, in laser processing, the main surface of the light guide plate is partially melted by using the heat of the laser light condensed on the main surface of the light guide plate, thereby forming a concave pattern on the main surface. Similarly, in the molding process, a shape reflecting the outer shape of the light guide plate to be molded is formed inside the mold, and for example, a mold softened by heating is injected into the mold mounted on the injection molding machine. Then, the resin is cooled to form a concave pattern, a convex pattern, or a concave and convex pattern on the main surface of the light guide plate.

  Further, regarding the manufacturing method of the light guide plate, in silk printing processing, a plate having predetermined holes opened against the main surface of the light guide plate, and a curable resin is attached to the main surface through the holes, A convex pattern is formed on the main surface by partially covering the main surface with resin. Moreover, you may add the fine particle-shaped diffusion member which emits diffused light, for example to resin which is the base material of the light-guide plate used for a shaping | molding process or a silk printing process. Similarly, for example, a resin that is a base material of a light guide plate that performs the above-described ultrasonic processing, heating processing, cutting processing, or laser processing may be added with a particulate diffusion member that emits diffused light. Note that the light guide plate may be formed by a combination of the above-described ultrasonic processing, heating processing, cutting processing, laser processing, molding processing, and silk printing processing. Specifically, for example, after forming only the outer shape of the light guide plate by molding, a concave pattern may be formed on the main surface of the light guide plate by ultrasonic processing, for example. Similarly, after only the outer shape of the light guide plate is formed by molding, for example, a convex pattern may be formed on the main surface of the light guide plate by silk printing, for example.

  Finally, the configuration and main functions and effects of each lighting device according to the first and second embodiments of the present invention will be described for each claim.

  The lighting device 1 or the lighting device 2 according to claim 1 includes a power receiving unit 10 to which power is supplied from the outside, a power source unit 20 that is connected to the power receiving unit 10 and converts power into predetermined driving power, and a power source unit. 20, a light source unit 30 that emits light by driving power, a housing unit 40 that houses the power source unit 20 and the light source unit 30, and a plate-like shape that guides the light of the light source unit that is incident from the incident surface from the output surface. The light guide plate includes a light guide portion 50 or 60 provided so as to protrude from one end of the housing portion. The light guide plate is adjacent to and perpendicular to the incident surface, and the second light emitting surface is opposed to the incident surface. The second emission surface is a curved surface provided on the outer side in the radial direction of the housing portion and a predetermined direction with respect to the normal direction of the incident surface provided on the inner side in the radial direction of the housing portion. The position in contact with the plane inclined at an angle is the farthest away from the light source unit in the direction perpendicular to the light source unit. It is characterized in that.

  According to the illuminating device 1 or the illuminating device 2 configured as described in claim 1, the light of the light source incident from the incident surface of the light guide plate is attenuated by multiple reflection inside the light guide plate, It can be derived from the emission surface at a predetermined radiation angle. For example, as shown in FIG. 10, the light guide plate 57 can effectively propagate the light of the light source 31 d disposed at the center of the incident surface 57 a to the outside in the radial direction of the housing 40. That is, the light derived from the light source 31d is incident from the incident surface 57a of the light guide plate 57, and is reflected by the second emission surface 57q which is a plane inclined at a predetermined angle with respect to the normal direction of the incident surface 57a. Later, the light is derived from a second emission surface 57r formed of a curved surface provided on the outer side in the radial direction of the casing 40. Accordingly, a part of the light of the light source 31d arranged at the center of the incident surface 57a of the cross-shaped light guide plate 57 can be efficiently propagated to the outside in the radial direction of the housing 40 while suppressing multiple reflection.

  The lighting device 1 or the lighting device 2 according to claim 2 is dependent on claim 1, and the position where the plane of the second emission surface and the first emission surface are in contact with the curved surface of the second emission surface. It is characterized in that it is closer to the entrance surface than the position where the first exit surface is in contact.

  According to the illuminating device 1 or the illuminating device 2 configured as described in claim 2, the position 57 y where the second emission surface 57 q and the first emission surface 57 p are in contact with each other in the light guide plate 57 shown in FIG. 10. However, since it is closer to the incident surface 57a than the position 57x where the second emission surface 57r and the first emission surface 57s are in contact, the light incident from the incidence surface 57a is reflected by the second emission surface 57q. After that, it is easily propagated in the direction of the second emission surface 57r.

  The lighting device 1 or the lighting device 2 according to claim 3 is dependent on claim 1, and the light guide portion 50 or 60 is formed radially toward the outside in the radial direction of the housing portion. It is said.

  According to the illuminating device 1 or the illuminating device 2 configured as described above, for example, in the light guide plate 57 of the light guide unit 50 shown in FIG. 9, the outer side in the radial direction of the housing 40 shown in FIG. Therefore, the light guide 50 can be formed in a three-dimensional shape imitating a general lamp light source.

  The lighting device 1 or the lighting device 2 according to claim 4 is dependent on claim 1, and the plurality of first light exit surfaces of the light guide plate provided on the outer side in the radial direction of the housing 40 are adjacent and obtuse. It is characterized by forming a polyhedron.

  According to the illuminating device 1 or the illuminating device 2 configured as described in claim 4, for example, like the light guide plate 55 shown in FIG. 12, the first radiating surface 55 b and the first radiating surface 55 u are arranged between the first radiating surface 55 b and the first radiating surface 55 u. By providing the first emission surface 55c formed to form an obtuse angle and the first emission surface 55n formed to form an obtuse angle between the first emission surface 55c and the first emission surface 55u. In addition, since the angle of light incident on each first emission surface from the inside of the light guide plate 55 is likely to be equal to or less than the critical angle, light can be easily led out from the light guide plate 55.

  The lighting device 2 according to a fifth aspect is dependent on the first aspect, wherein a concave or convex pattern that guides the light from the light source unit 30 as diffused light is formed on one or more of the light exit surfaces of the light guide plate. It is characterized by being.

  According to the illuminating device 2 having the configuration described in claim 5, the pattern 63 p formed on the first emission surface 63 b of the light guide plate 63, for example, like the light guide plate 63 shown in FIG. The diffused light can be generated by irradiating the light of the light source 31 incident from the incident surface 63a of the light guide plate 63, and the diffused light can be led out from the first emission surface 63c. Therefore, according to the illuminating device 2 which concerns on 2nd Embodiment, the diffused light by which the glare was suppressed can be used as substantially uniform surface emitting light. If the light guide plate 63 is not provided with the pattern 63p, each first exit surface intersecting the entrance surface 63a of the light guide plate 63 is compared with each second exit surface facing the entrance surface 63a of the light guide plate 63. Thus, the amount of light of the light source 31 directly derived from the inside of the light guide plate 61 is considerably small. However, by providing, for example, a concave pattern on an arbitrary first exit surface that intersects the entrance surface 63a of the light guide plate 63, diffused light is derived from the first exit surface that faces the first exit surface. Can be made. Therefore, the difference in the amount of light derived from each of the first emission surfaces and each of the second emission surfaces of the light guide plate 63 is suppressed, so that the light is derived from the plurality of emission surfaces provided on the light guide plate 63. The amount of light to be averaged can be averaged.

1, 2 illuminating device, 10 power receiving unit, 11 base, 11a, 43d outer peripheral surface, 11b, 41f inner peripheral surface, 12 insulating case, 12a one end, 12b other end, 12c housing recess, 12d, 32c, 41b, 41d, 43e Screw hole, 20 power supply part, 21 power supply circuit, 22, 23 wiring, 30 light source part, 31, 31a, 31b, 31c, 31d, 31e, 31f, 31g light source, 32 substrate, 32a wiring hole, 32b soldering pad, 40 Case part, 41 Case, 41a Wiring hole, 41c Substrate housing recess, 41e Heat radiation surface, 42 Fixing member, 43 Holding member, 43a Connection notch, 43b Protrusion, 43c, 51n, 52n, 61n, 62n Contact surface, 44 fixing member, 50, 60 light guide, 51, 52, 53, 54, 55, 57, 61, 62, 63, 64, 65, 10 Light guide plate, 51a, 52a, 53a, 54a, 55a, 57a, 61a, 62a, 63a, 64a, 65a entrance surface, 100z exit surface, 51b, 51c, 51d, 51g, 51h, 51i, 51p, 51s, 51t, 51u , 52b, 52c, 52d, 52g, 52h, 52i, 53p, 53s, 54p, 55b, 55c, 55p, 55u, 55m, 55n, 61b, 61c, 61d, 61g, 61h, 61i, 62b, 62c, 62d, 62g 62h, 62i, 63b, 63c, 64b, 64c, 65b, 65c First exit surface, 51e, 51f, 51q, 51r, 52e, 52f, 53q, 53r, 54q, 54r, 54s, 54t, 54u, 55q, 55r, 55s, 55t, 57s, 57p, 61e, 61f, 62e, 62f 51v, 51w, 51x, 51y, 53v, 53w, 53x, 53y, 54v, 54w, 54x, 54y, 55v, 55w, 55x, 57r, 57q Light exit location, 57x, 57y, 57z position, 51j , 52j, 61j, 62j Notch for connection, 51m, 52k, 61m, 62k Notch surface, 61p, 62p, 63p, 64p, 65d, 65e Pattern, 65f, 65i Bottom, 65g One surface, 65h Other surface, θ1, θ3 incident Angle, θ2 emission angle, θ4 reflection angle, n1, n2 refractive index, L1, L2, L3, L4, L101, L102, L111, L112, L113, L121, L122, L131, L132, L141, L142, L143, L151 L152, L153, L154, L161, L162, L171, L172 L181, L182, L191, L192, L193, L194, L201, L202, L211, L212, L221, L222, L223, L224, L231, L232, L241, L242, L251, L252, L261, L262, L271, L272, L311 L312, L313, L314, L321, L322, L331, L332, L341, L342, L352, L352, L353, L361, L362, L371, L372, L373, L381, L382, L383, L384, L391, L392, L393, L401, L402, L411, L412, L421, L422, L423, L431, L432, L441, L442, L511, L5122, L513, L521, L522, L531, L53 , L533, L541, L542, L551, L552, L553, L561, L562, L571, L572, L573, L581, L582, L583, L611, L612, L613, L614, L621, L6221, L632, L632, L633, L641, L642 , L643, L651, L652, L653, L661, L662, L663, L664, L671, L672, L681, L682, L691, L692, L801, L802, L803, L804, L805, L806, L807, L808, L809, L810, L811 , L812 Light.

Claims (5)

A power receiving unit to which power is supplied from the outside;
A power supply unit connected to the power receiving unit and converting the power into predetermined driving power;
A light source unit connected to the power source unit and emitting light by the driving power;
A housing for housing the power supply and the light source;
A light guide portion provided by projecting from one end of the housing portion, a plate-like light guide plate that guides light from the light source portion incident from the incident surface from the exit surface;
The light guide plate includes a first exit surface that is adjacent to and orthogonal to the entrance surface, and a second exit surface that faces the entrance surface;
The second emission surface is provided at a predetermined angle with respect to a curved surface provided on a radially outer side of the housing portion and a normal direction of the incident surface provided on a radially inner side of the housing portion. The lighting device characterized in that a position where the inclined flat surface is in contact is furthest away from the light source unit in a direction orthogonal to the light source unit. The position where the flat surface of the second exit surface and the first exit surface are in contact is greater than the position where the curved surface of the second exit surface is in contact with the first exit surface. The lighting device according to claim 1, wherein the lighting device is close to a surface. The lighting device according to claim 1, wherein the light guide portion is formed radially toward an outer side in a radial direction of the housing portion. The plurality of first emission surfaces of the light guide plate provided on the outer side in the radial direction of the housing part form a polyhedron that forms an obtuse angle adjacent to each other. Lighting device. 2. The illumination device according to claim 1, wherein a concave or convex pattern that guides light of the light source unit as diffused light is formed on one or more of the light exit surfaces of the light guide plate.