CN110554551A - Lighting device and lighting system - Google Patents

Abstract

The invention provides an illumination device and an illumination system with high added value. The illumination device of the embodiment includes a light source unit, a cover, and a projector. The light source unit has a light source for illumination. The cover covers the light source for illumination from the emitting surface side. The projector projects an image from the illumination light source side onto the cover.

Description

Lighting device and lighting system

Technical Field

Embodiments of the present invention relate to an illumination device and an illumination system.

Background

Among general household lighting fixtures, the following are widely used: a Light Emitting Diode (LED) arranged in a ring shape is used as a main Light source, and a translucent cover (shade) is provided so as to cover a lower side of the ring-shaped LED, thereby forming an external shape into a circular shape.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open publication No. 2017-174833

Disclosure of Invention

[ problems to be solved by the invention ]

However, the conventional lighting device has room for improvement in providing a lighting device with high added value. For example, the conventional lighting device has only a function of lighting, and a lighting device in which lighting is provided in combination with other functions is not considered.

The invention provides a lighting device and a lighting system with high added value.

[ means for solving problems ]

The illumination device of the embodiment includes a light source unit, a cover, and a projector. The light source unit has a light source for illumination. The cover covers the light source for illumination from the emitting surface side. The projector projects an image from the illumination light source side onto the cover.

The lighting system of the embodiment includes: a detection device that detects motion information of a user; and the illumination device that controls one or both of the light source unit and the projector based on the operation information detected by the detection device.

[ Effect of the invention ]

According to the present invention, a lighting device and a lighting system with high added value can be provided.

drawings

Fig. 1 is a diagram showing an outline of a lighting device according to a first embodiment.

Fig. 2 is a diagram showing a specific example of the operation pattern of the first embodiment.

Fig. 3 is a schematic sectional view showing the lighting device according to the first embodiment.

Fig. 4 is a schematic diagram showing a connection relationship of the lighting device of the first embodiment.

Fig. 5 is a schematic cross-sectional view of a lighting device according to modification 1 of the first embodiment.

Fig. 6 is a schematic cross-sectional view of a lighting device according to modification 2 of the first embodiment.

fig. 7 is a schematic cross-sectional view of a lighting device according to modification 3 of the first embodiment.

Fig. 8 is a schematic sectional view of a lighting device of the second embodiment.

Fig. 9 is a schematic cross-sectional view of a lighting device according to a modification of the second embodiment.

Fig. 10 is a schematic sectional view of a lighting device of a third embodiment.

Fig. 11 is a schematic diagram showing an example of a projection image for evaluation test.

Fig. 12 is a diagram showing a relationship between the evaluation index and the score.

Fig. 13 is a graph showing a relationship between total light transmittance and score of the cover.

Fig. 14 is a graph showing a relationship between total light transmittance and score of the cover.

Fig. 15 is a diagram showing an outline of the illumination system of the embodiment.

[ description of symbols ]

1. 1A to 1G: lighting device

20. 120, 220: frame body

21: front face

22: side surface part

22 a: cylindrical part

22 b: cone part

23: back part

30. 71, 130, 230: body part

30a, 224 a: front panel

30 b: facing surface

31. 222: flat part

31a, 80a, 132, 233: opening of the container

32: concave part

32 a: the first wall surface

32 b: bottom surface

32c, the ratio of: second wall surface

33. 65a, 224: outer edge part

40: light emitting part

41. 44: a first light emitting part

41a, 50 a: luminous surface

42. 45, 48, 51, 131: substrate

43a, 46 a: first light emitting element

43b, 46 b: second light emitting element

43c, 46 c: third light emitting element

47. 50: the second light emitting part

49. 52: fourth light emitting element

60: cover

60 c: outer edge

61: the first part

62: the second part

63: inner surface

64. 221 a: outer surface

65: decorative frame part

70: projector with a light source

72: lens member

72 a: emitting surface

75: image light path

80: light shielding part

90: ceiling

91: mounting surface

100: a first power supply part

101: antenna with a shield

102: loudspeaker

105: second power supply unit

110. 210: mounting part

121: through hole

133: substrate for indirect light source

141: light source for illumination

142: indirect light source

150: color part

160: character part

170: reflecting member

180: lens member

190: detection device

221: neck part

222 a: back side of the panel

223: connecting part

225: a first container part

226: second container part

231: first main surface

232: second main surface

300: lighting system

310: user' s

a: outer diameter

b: distance between two adjacent plates

A1, A2, B: arrow head

R: region(s)

R1: first region

R2: second region

S: space(s)

st 1: illumination mode

st 2: image mode

T: external device

X, Y, Z: direction of rotation

Detailed Description

An illumination device according to an embodiment to be described below includes a light source unit, a cover, and a projector. The light source unit has a light source for illumination. The cover covers the light source for illumination from the emitting surface side. The projector projects an image from the illumination light source side onto the cover.

The illumination device of the embodiment described below includes a lens member. The lens member is disposed on an image optical path of the projector and diffuses an image output from the projector. The lens member projects the image in an area of 50% or more of the front face of the mask.

The projector according to the embodiment described below is housed in a housing in which the illumination light source is disposed.

The light source unit of the embodiment described below has a white light source array in which a plurality of white light sources are arranged.

The light source unit of the embodiments described below includes a primary color light source array in which a plurality of primary color light sources are arranged.

In the embodiments described below, the primary color light source row is arranged on the outermost side of the plurality of light source rows.

The lens member of the embodiments described below includes a fisheye lens or a wide-angle lens attached to a projector.

The cover of the embodiment described below is formed of a translucent member having a total light transmittance of 30% to 80%.

The illumination device according to the embodiment described below includes a detection unit and a control unit. The detection unit detects motion information of a user. The control unit controls one or both of the light source unit and the projector based on the operation information detected by the detection unit.

The illumination system of the embodiment described below includes a detection device and an illumination device. The detection means detects motion information of the user. The illumination device controls one or both of the light source unit and the projector based on the operation information detected by the detection device.

Hereinafter, the lighting device of the embodiment will be described with reference to the drawings. In the embodiments, the same portions are denoted by the same reference numerals, and redundant description may be omitted.

[ first embodiment ]

First, an outline of the lighting device of the first embodiment will be described with reference to fig. 1. Fig. 1 is a diagram showing an outline of a lighting device according to an embodiment. As shown in fig. 1, the lighting device 1 is a so-called ceiling light (ceiling light) mounted on a ceiling 90. In the following description, a direction away from the ceiling 90 with reference to a certain member or portion may be referred to as a "front side", and a direction toward the ceiling 90 may be referred to as a "rear side".

As shown in fig. 1, the lighting device 1 according to the first embodiment is a lighting device capable of projecting an image onto a cover 60 covering a main body of the lighting device 1. More specifically, the lighting device 1 includes a projector 70 that projects an image as described below, and the image output from the projector 70 is projected onto the inner surface of the cover 60. That is, in the illumination device 1 of the embodiment, the cover 60 also functions as a screen.

This allows the user to recognize the image projected onto the lighting device 1 in a lying posture. For example, when the lighting device 1 is introduced into a bed, the patient can recognize the image projected onto the lighting device 1 in a posture of lying on the bed.

As described above, the illumination device 1 according to the first embodiment has a projection function for projecting an image in addition to an illumination function for illuminating the interior of a room. Therefore, according to the lighting device 1 of the first embodiment, a lighting device with high added value can be provided. In addition, in the illumination device 1 of the first embodiment, since a wall or a screen for projecting an image is not required, the restriction on the installation position can be reduced, and the limitation of the use range or the application can be suppressed.

next, an operation mode of the illumination device 1 will be described with reference to fig. 2. Fig. 2 is a diagram showing a specific example of the operation pattern of the first embodiment. As shown in fig. 2, the lighting device 1 operates in a lighting mode st1 or a video mode st 2.

The illumination pattern st1 is a pattern for illuminating the room, and is a pattern for lighting the illumination light source 141 described later. The image mode st2 is a mode for projecting an image output from the projector onto the cover 60. The illumination device 1 may include a mode for projecting an image onto the cover 60 while illuminating the room. In this mode, the lighting device 1 may set an upper limit to the intensity of the output light so as to illuminate with a lower illuminance than in the mode in which the interior is illuminated, for example.

For example, the lighting apparatus 1 can switch between the lighting mode st1 and the video mode st2 in response to a control signal input from a remote controller not shown.

Next, a configuration example of the illumination device 1 according to the first embodiment will be described with reference to fig. 3. Fig. 3 is a schematic sectional view of the lighting device of the first embodiment. Fig. 3 corresponds to a schematic view in which a section is taken in the vertical direction after the lighting device 1 is mounted.

As shown in fig. 3, the lighting device 1 includes: the mounting unit 110, the frame 120, the main body 130, the substrate 131, the illumination light source 141, the cover 60, the projector 70, and the reflection member 170. Fig. 3 shows a case where the lighting device 1 includes an indirect light source 142 and an indirect light source substrate 133 on which the indirect light source 142 is provided. The indirect light source 142 is a light source that is provided on the outer surface of the housing 120 and emits light toward the ceiling 90, and the indirect-light-source substrate 133 is a substrate on which the indirect light source 142 is provided. The illumination light source 141 and the indirect light source 142 are examples of light source units.

The mounting portion 110 is an adapter (adapter) for fixing the lighting device 1 to a ceiling-mounted lamp panel (not shown). For example, the lighting device 1 operates by power supplied from the ceiling lamp panel through the mounting portion 110.

For example, the illumination light source 141, the indirect light source 142, and the projector 70 can be operated by electric power supplied from a ceiling-mounted lamp panel. That is, since an additional power supply for operating the projector 70 is not necessary, the installation of the illumination device 1 can be simplified. The power source for operating the projector 70 may be different from the ceiling-mounted lamp.

The housing 120 is a housing that houses the projector 70 or the reflection member 170, and the main body 130 is provided at a lower end. In this way, the projector 70 is built in the housing 120, so that the mounting of the illumination device 1 can be simplified. As will be described later, the projector 70 may be disposed outside the housing 120.

The main body 130 is a heat conductive chassis (chassis) formed in a circular shape from a flat plate of a metal material such as a cold-rolled steel plate. The main body 130 is circular in plan view and has an opening 132 at the center. That is, the main body 130 has a doughnut shape in a plan view. The main body 130 may be formed integrally with the frame 120. The size of the opening 132 may be any size as long as the entire image output from the projector 70 or a predetermined range is projected onto the cover 60. For example, the opening 132 may be arbitrarily set according to a distance from the image output from the projector 70 to the cover 60 via the reflection member 170, a size of the image to be displayed, a size of the cover 60, a focal length of the projector 70, or the like.

The substrate 131 is formed of a Surface Mount Device (SMD) type, and the light source 141 for illumination is mounted on a mounting Surface. However, the substrate 131 is not limited to the SMD format, and may be a Chip On Board (COB) format. For example, the substrate 131 is arranged by joining four substantially arc-shaped substrates having a predetermined width, and is formed in a substantially ring shape as a whole, that is, a doughnut shape.

The illumination light sources 141 are LEDs mounted on the substrate 131. For example, the plurality of illumination light sources 141 are arranged along the circumferential direction of the substrate 131. The illumination light source 141 is not limited to an LED, and may be a fluorescent lamp.

The cover 60 is a so-called globe made of a translucent milky white resin. The cover 60 is opened on the upper surface side and attached so as to cover the lower surface of the main body 130, the substrate 131, and the illumination light source 141 from the emission surface side of the illumination light source 141. In addition, the lower surface portion of the cover 60 is formed in a dome shape so as to smoothly curve and protrude. Further, the cover 60 diffuses light output from the illumination light source 141, thereby widening an illumination range and improving uniformity. Further, by using such a cover 60, even when a light emitting element such as an LED that outputs light having high linearity is used, the granular sensation of light used for illumination can be reduced.

The projector 70 projects an image from the illumination light source 141 side onto the cover 60. The projector 70 may be connected to an external device to project an image acquired from the external device, and this will be described with reference to fig. 4.

In the example shown in fig. 3, the image output from the projector 70 is indirectly projected onto the cover 60. That is, the image output from the projector 70 is once reflected by the reflection member 170 and projected onto the cover 60. This makes it possible to obtain an image optical path of an image output from the projector 70.

For example, when a video image output from the projector 70 is projected in a predetermined size, a video optical path (so-called projection distance) having a predetermined length from a lens of the projector 70 to a projection surface is required. In addition, when the projection distance is short, the projected image may be blurred. Therefore, when an appropriate image (for example, an image of a predetermined size without blurring) is projected from the projector 70 disposed inside the illumination device 1 onto the cover 60, a sufficient distance must be secured from the projector 70 to the cover 60. However, when an attempt is made to project an image directly from the projector 70 onto the cover 60, the thickness of the product of the illumination device 1 may increase, and the appearance of the illumination device 1 may be degraded. Further, if the product of the illumination device 1 is made thinner with importance placed on the aesthetic appearance, a sufficient distance cannot be secured from the projector 70 to the cover 60, and the range of projecting an image onto the cover 60 may be limited or the image may be blurred.

In contrast, in the illumination device 1 of the first embodiment, since the image is output from the projector 70 to the reflection member 170 and then output from the reflection member 170 to the cover 60, the image output from the projector 70 can be projected onto the cover 60 after being sufficiently enlarged.

In other words, since the reflection member 170 is provided, the length of the optical path of the image of the projector 70 can be sufficiently secured, and thus the range of projection onto the cover 60 can be expanded while suppressing an increase in the thickness of the illumination device 1.

the reflecting member 170 is disposed on the image optical path of the projector 70, and reflects the image output from the projector 70 toward the cover 60. Further, the image reflected by the reflecting member 170 is projected toward the cover 60 through the opening 132. That is, in the illumination device 1, the opening 132 for allowing an image to pass through is provided in the substrate 131, so that an image output from the projector 70 can be projected onto the cover 60 without being blocked by the substrate 131 and the like. In the example shown in fig. 3, the opening 132 is provided in the substantially central portion of the substrate 131, but the present invention is not limited to this, and the opening 132 may be provided so as to move from the substantially central portion of the substrate 131. The number of the reflecting members 170 is not necessarily one, and may be plural.

As described above, the lower surface of the cover 60 has a dome shape, and the distance from the reflecting member 170 to the cover 60 varies depending on the location. Therefore, it is conceivable that distortion occurs in the image projected onto the mask 60. In response to the above problem, the reflection member 170 may be formed in a spherical shape, for example, to correct the distortion of the image. The correction may be performed by setting the projector 70.

Next, the connection relationship of the lighting device 1 will be described with reference to fig. 4. Fig. 4 is a schematic diagram showing a connection relationship of the lighting device 1 according to the first embodiment. As shown in fig. 4, the lighting device 1 may mount an antenna 101 and a speaker 102.

For example, the antenna 101 is an interface for performing Wireless communication in accordance with a communication standard such as Wireless Fidelity (Wifi) (registered trademark) or Bluetooth (Bluetooth) (registered trademark). The lighting apparatus 1 can acquire an image projected onto the cover 60 from the external device T via the antenna 101. Specifically, when the user of the external device T performs a predetermined operation such as a slide operation on an image displayed on the display unit 103, the external device T outputs a control signal including image data. When the antenna 101 receives a control signal output from the external device T, the lighting device 1 outputs an image corresponding to image data from the projector 70 based on the received control signal, and projects the image onto the cover 60.

The lighting device 1 may acquire audio information associated with the video from the external device T and output audio associated with the video from the speaker 102. That is, the lighting device 1 can provide the content in which the sound is added to the video.

In this way, the lighting device 1 can provide various contents by acquiring images and sounds from the external device T. The lighting device 1 may be connected to an external network such as the internet to acquire content via the external network. That is, for example, the lighting device 1 may directly acquire contents such as a video purchased by the user through the external device T via the external network.

The antenna 101 and the speaker 102 may be provided inside the lighting device 1, or the lighting device 1 may be connected to the external device T or an external network via a wired cable. In addition, for example, when the lighting device 1 is installed on a hospital bed as described above, the speaker 102 is preferably a directional speaker for providing directivity to the output sound. Thus, a sound can be selectively notified to the patient of the bed.

(modification 1)

Next, a lighting device according to modification 1 of the first embodiment will be described with reference to fig. 5. Fig. 5 is a schematic cross-sectional view showing a configuration example of an illumination device according to modification 1 of the first embodiment. As shown in fig. 5, the illumination device 1A is different from the illumination device 1 described above in that the projector 70 is provided outside the housing 120.

As shown in fig. 5, the illumination device 1A includes a projector 70 outside a housing 120, and a through-hole 121 in an image optical path of the projector 70 of the housing 120. For example, the projector 70 is directly attached to the ceiling 90, and outputs an image to the reflection member 170 through the through-hole 121 provided in the side wall of the housing 120.

In this way, in the illumination device 1A, by providing the projector 70 outside the housing 120, the thickness of the illumination device 1A itself can be suppressed to a portion corresponding to the projector 70. Further, by providing the projector 70 outside the housing 120, the optical path of the image of the projector 70 can be made longer as compared with the case where the projector 70 is provided inside the housing 120.

(modification 2)

Next, a lighting device according to modification 2 of the first embodiment will be described with reference to fig. 6. Fig. 6 is a schematic cross-sectional view showing a configuration example of an illumination device according to modification 2 of the first embodiment. As shown in fig. 6, an illumination device 1B according to modification 2 of the first embodiment is different from the illumination device 1 and the illumination device 1A in that a lens member 180 is provided instead of the reflection member 170 provided in the illumination device 1 and the illumination device 1A.

As shown in fig. 6, the illumination device 1B outputs an image from the projector 70 to the cover 60, and a lens member 180 is provided on the image optical path of the projector 70. The lens member 180 is a lens such as a wide-angle lens, and diffuses an image output from the projector 70 and outputs the image to the cover 60.

That is, in the illumination device 1B, the image output from the projector 70 is diffused by the lens member 180 and projected toward the cover 60. Therefore, even when the distance from the projector 70 to the cover 60, that is, the optical path of the image of the projector 70 cannot be sufficiently secured, the image can be projected onto the cover 60 over a wide range.

(modification 3)

Next, a lighting device according to modification 3 of the first embodiment will be described with reference to fig. 7. Fig. 7 is a schematic cross-sectional view showing a configuration example of an illumination device according to modification 3 of the first embodiment. As shown in fig. 7, an illumination device 1C according to modification 3 of the first embodiment is different from the illumination device 1, the illumination device 1A, and the illumination device 1B in that the reflection member 170 and the lens member 180 are provided together.

For example, the illumination device 1C includes the projector 70 outside the housing 120, and outputs an image from the projector 70 to the reflection member 170. The image reflected by the reflecting member 170 is diffused by the lens member 180 and projected toward the cover 60.

That is, in the illumination device 1C, the optical path of the image of the projector 70 is lengthened by the reflection member 170, and the image is diffused by the lens member 180. In this way, in the illumination device 1C, the reflection member 170 is used in combination with the lens member 180, whereby the thickness of the illumination device 1C can be made thinner.

In the example shown in fig. 7, the projector 70 is provided outside the housing 120, but the projector 70 may be housed in the housing 120. Further, although the case where the image passes through the projector 70, the reflection member 170, and the lens member 180 in this order has been described, the image may pass through the projector 70, the lens member 180, and the reflection member 170 in this order.

As described above, the illumination device 1, the illumination devices 1A to 1C according to the first embodiment include: an illumination light source 141, a cover 60 covering the illumination light source 141 from the emission surface side, and a projector 70 projecting an image from the illumination light source 141 side onto the cover 60. Therefore, the illumination device 1 and the illumination devices 1A to 1C can provide an illumination device with high added value.

In the above embodiment, the case where the image is indirectly projected from the projector 70 to the cover 60 has been described, but the image may be directly projected from the projector 70 to the cover 60. That is, the reflecting member 170 or the lens member 180 may be omitted.

[ second embodiment ]

Next, a configuration example of the illumination device according to the second embodiment will be described with reference to fig. 8. Fig. 8 is a schematic sectional view of a lighting device of the second embodiment. For ease of understanding, fig. 8 and the like may show a three-dimensional orthogonal coordinate system including a Z axis in which a vertical upward direction is a positive direction and a vertical downward direction is a negative direction.

As shown in fig. 8, the illumination device 1D of the second embodiment includes a mounting portion 210, a frame 220, a main body portion 230, a light emitting portion 40, a cover 60, and a projector 70.

The mounting portion 210 is an adapter for fixing the lighting device 1 to a ceiling-mounted lamp panel, not shown. For example, the lighting device 1D operates by power supplied from the ceiling lamp panel through the mounting portion 210. The power source for operating the projector 70 may be different from the ceiling-mounted lamp.

the housing 220 is a housing for accommodating the projector 70. The frame 220 is a flat plate-shaped member having a neck portion 221, a flat portion 222, a connecting portion 223, and an outer edge portion 224, and formed integrally therewith. The neck portion 221 has a cylindrical shape extending from the outer edge of the mounting portion 210 toward the Z-axis negative direction side. The neck 221 is a spacer that defines a distance between the ceiling 90 and the flat portion 222. In addition, although the case where the neck portion 221 is a part of the housing 220 has been described, the neck portion may be a part of the attachment portion 210.

The flat portion 222 is a plate-shaped member extending along the XY plane so as to surround the neck portion 221. The flat portion 222 has a back surface 222a facing the ceiling 90 via the neck portion 221. The flat portion 222 is illustrated such that the rear surface 222a is substantially parallel to the ceiling 90, but may be disposed so as to be inclined with respect to the ceiling 90.

The outer edge portion 224 is an annular member having a front surface 224a facing the main body portion 230. The outer edge portion 224 is connected to the flat portion 222 via a connecting portion 223.

In addition, a first receiving portion 225 and a second receiving portion 226 are formed in the housing 220. The first receiving portion 225 is a space surrounded by the mounting portion 210 and the neck portion 221, and the second receiving portion 226 is a space surrounded by the first receiving portion 225, the connecting portion 223, and the outer edge portion 224. The projector 70 is accommodated in the first accommodating portion 225. By housing the projector 70 in the first housing section 225 in the housing 220 in this manner, the mounting of the illumination device 1D can be simplified. The projector 70 may be disposed so as to be embedded in the ceiling 90.

The second receiving portion 226 cooperates with the cover 60 to define a projection distance from the projector 70. The second receiving portion 226 may receive a part of the projector 70.

The shapes of the first receiving portion 225 and the second receiving portion 226 are not limited to those shown in the drawings. For example, the flat portion 222 and the outer edge portion 224 may be formed in a row extending along the XY plane, and thus the second receiving portion 226 may not be provided. The projector 70 may be accommodated in the second accommodation portion 226 without the first accommodation portion 225 between the attachment portion 210 and the neck portion 221.

The body portion 230 is a thermally conductive chassis formed from a flat plate of a metal material into a circular shape, as with the body portion 130 shown in fig. 3, for example. The main body 230 is circular in plan view and has an opening 233 at the center. That is, the main body 230 has a ring shape in a plan view. The first main surface 231 on the back side of the main body 230 is attached to the outer edge portion 224 of the housing 220, and the first light-emitting unit 41 and the first light-emitting unit 44, which will be described later, are attached to the second main surface 232 on the front side. Heat generated by the light emission of the first light emitting units 41 and 44 is dissipated through the main body 230 and the frame 220.

The main body 230 may be formed integrally with the housing 220. The opening 233 may have any size as long as it projects the entire image output from the projector 70 or a predetermined range onto the cover 60. For example, the opening 233 may be arbitrarily set in accordance with a distance from the image output from the projector 70 to the cover 60, a size of the image to be displayed, a size of the cover 60, a focal length of the lens member 72 included in the projector 70, or the like.

The light emitting section 40 includes a first light emitting section 41, a first light emitting section 44, a second light emitting section 47, and a second light emitting section 50. The first and second light-emitting portions 41 and 44 are disposed on the second main surface 232 of the main body 230, and the second and second light-emitting portions 47 and 50 are disposed on the rear surface 222a of the flat portion 222. The first light-emitting portions 41 and 44 are disposed outside the opening 233 so as to face each other with the opening 233 therebetween. The second light emitting unit 47 and the second light emitting unit 50 are disposed outside the mounting unit 210 so as to face each other with the mounting unit 210 interposed therebetween.

The first light emitting unit 41 includes a substrate 42, a first light emitting element 43a, a second light emitting element 43b, and a third light emitting element 43 c. The first light-emitting element 43a is disposed on the outermost side of the first to third light-emitting elements 43a to 43 c. The second light emitting element 43b is disposed inside the first light emitting element 43a so as to be disposed between the first light emitting element 43a and the third light emitting element 43c, and the third light emitting element 43c is disposed between the second light emitting element 43b and the opening 233. The first to third light emitting elements 43a to 43c are examples of illumination light sources.

The first light emitting section 44 has a substrate 45, a first light emitting element 46a, a second light emitting element 46b, and a third light emitting element 46 c. The second light emitting element 46b is disposed inside the first light emitting element 46a so as to be disposed between the first light emitting element 46a and the third light emitting element 46c, and the third light emitting element 46c is disposed between the second light emitting element 46b and the opening 233. The first to third light emitting elements 46a to 46c are examples of illumination light sources.

The substrates 42 and 45 are configured in an smd (surface Mount device) type, and the first to third light emitting elements 43a to 43c and the first to third light emitting elements 46a to 46c are mounted on the mounting surface, respectively. However, the substrates 42 and 45 are not limited to the SMD format, and may be cob (chip on board) format. In fig. 3, four substrates having a substantially circular arc shape and having a predetermined width are joined together, and the entire substrate is formed in a substantially circular shape. That is, the substrate formed in a substantially circular shape as a whole includes four divided substrates, and the substrates 42 and 45 are partially shown in the drawings. Similarly, the light emitting elements in the plural rows are arranged in a substantially circular shape surrounding the opening 233, for example.

The first light-emitting elements 43a and 46a have a first light source row as a primary color light source row in which a plurality of primary color light sources are arranged along the circumferential direction or the longitudinal direction of the substrates 42 and 45. A plurality of primary color light sources having different emission colors are alternately arranged in a primary color light source row. Specifically, the primary color light source row has primary color light sources that emit red, green, and blue light, respectively, and emits light synthesized in accordance with dimming and color modulation control. However, the primary color light source row may have one or two or four or more primary color light sources.

The second light emitting element 43b, the second light emitting element 46b, the third light emitting element 43c, and the third light emitting element 46c respectively have a second light source row and a third light source row as white light source rows in which a plurality of white light sources are arranged along the circumferential direction or the longitudinal direction of the substrates 42 and 45. The color temperature of the white light sources of the second light emitting element 43b, the second light emitting element 46b, the third light emitting element 43c, and the third light emitting element 46c may be the same or different. The white light source rows of the second light emitting element 43b, the second light emitting element 46b, the third light emitting element 43c, and the third light emitting element 46c may be arranged with a plurality of white light sources having different color temperatures. Here, the white light source may be one emitting light of an incandescent lamp color or a neutral white color, or may be one emitting light of a warm white color, a daylight color, or the like.

The first to third light emitting elements 43a to 43c and the first to third light emitting elements 46a to 46c are, for example, LEDs. The lighting device 1D can independently control dimming of the first light-emitting element 43a and the first light-emitting element 46a as the primary color light sources, and the second light-emitting element 43b and the second light-emitting element 46b and the third light-emitting element 43c and the third light-emitting element 46c as the white light sources, respectively. Thus, the first light emitting unit 41 and the first light emitting unit 44 can adjust the light control ratio of each emission color to vary the light output of each emission color.

The first to third light-emitting elements 43a to 43c and the first to third light-emitting elements 46a to 46c emit light when an image is projected from the projector 70. The first to third light-emitting elements 43a to 43c and the first to third light-emitting elements 46a to 46c are examples of the light source section. The first to third light-emitting elements 43a to 43c and the first to third light-emitting elements 46a to 46c may emit light simultaneously or only a part of the light-emitting element rows may emit light.

The first light emitting portions 41 and 44 may be formed in a ring shape so as to surround the outside of the opening 233. That is, the substrates 42 and 45 may be one substrate arranged in a ring shape. The first to third light source rows may have annular light source rows arranged at substantially equal intervals along the circumferential direction of the substrate arranged in an annular shape.

The second light-emitting section 47 includes a substrate 48 and a fourth light-emitting element 49. The second light emitting section 50 includes a substrate 51 and a fourth light emitting element 52. The substrates 48 and 51 are, for example, Flexible Printed Circuit (FPC) boards. The substrates 48 and 51 may be different from or the same as the substrates 42 and 45.

The fourth light emitting elements 49 and 52 each have a primary color light source row in which a plurality of primary color light sources are arranged along the circumferential direction or the longitudinal direction of the substrates 48 and 51, and emit light combined in accordance with the light control and the color control. The fourth light emitting element 49 and the fourth light emitting element 52 are examples of indirect light sources. The substrates 48 and 51 may be one substrate arranged in a ring shape. The fourth light emitting elements 49 and 52 may have light source rows arranged along the circumferential direction of the substrate arranged in a ring shape.

The cover 60 is a so-called globe made of a translucent milky white resin. The cover 60 has a first portion 61 on an inner surface 63, on which an image from the projector 70 is projected, and a second portion 62 disposed outside the first portion 61. The second portion 62 is formed so that the light transmittance becomes lower than that of the first portion 61. Further, by disposing the second portion 62 outside the first portion 61, the color rendering effect of the image projected from the projector 70 can be improved.

The cover 60 is open on the inner surface 63 side and attached so as to cover the second main surface 232 of the main body 230, the first light-emitting units 41, and the first light-emitting units 44 from the front surface side, i.e., the emission surface side of the first light-emitting units 41 and 44. The outer surface 64 of the cover 60 on the front surface side of the lighting device 1D is formed in a dome shape so as to smoothly curve and protrude. The cover 60 diffuses light output from the first light emitting units 41 and 44, thereby widening the illumination range and improving the uniformity. Further, by using such a cover 60, even when a light emitting element such as an LED that outputs light having high linearity is used, the granular sensation of light used for illumination can be reduced. The cover 60 may be formed integrally without the second portion 62.

The projector 70 projects an image onto the cover 60 from the back side. The projector 70 has a body 71 and a lens member 72. The main body 71 outputs an image. The lens member 72 diffuses the image output from the main body 71 so as to project the image on a predetermined image optical path 75 toward the cover 60. The lens member 72 is, for example, a fisheye lens or a wide-angle lens.

The projector 70 projects the image output from the projector 70 into the first region R1 facing the opening 233 in the cover 60. When the lens member 72 is selected so that an image is projected on 50% or more of the entire region R on the front surface side of the cover 60, the image projected from the projector 70 can be easily recognized from the front surface (outer surface 64) side of the cover 60.

In addition, light emitted from the third light-emitting elements 43c and 46c in the first and second light-emitting portions 41 and 44 is irradiated to the first region R1. When the third light-emitting elements 43c and 46c are caused to emit light when the image from the projector 70 is projected onto the first region R1 of the cover 60, the image projected onto the first region R1 can be made conspicuous.

On the other hand, the light from the first light-emitting elements 43a and 46a is irradiated to the second region R2 outside the first region R1 in the cover 60 without projecting the image from the projector 70. When the first light-emitting elements 43a and 46a are caused to emit light when the image from the projector 70 is projected onto the first region R1 of the cover 60, the boundary between the image projected onto the first region R1 and the first region R1 can be made unclear. That is, by changing the light emitting elements that emit light when the image from the projector 70 is projected onto the cover 60 among the first light emitting portions 41 and 44, the color rendering effect according to the application can be arranged.

The second light emitting unit 47, the fourth light emitting element 49, and the fourth light emitting element 52 of the second light emitting unit 50 that illuminate the space between the ceiling 90 and the rear surface 222a when the image is projected from the projector 70 can improve the color rendering effect by the first light emitting unit 41 and the first light emitting unit 44. The fourth light emitting element 49 and the fourth light emitting element 52 are examples of the light source unit. The second light-emitting unit 47 and the second light-emitting unit 50 may be configured to emit light simultaneously with the first light-emitting unit 41 and the first light-emitting unit 44, or only the second light-emitting unit 47 and the second light-emitting unit 50 may be configured to emit light when the first light-emitting unit 41 and the first light-emitting unit 44 are turned off.

(modification example)

In the above embodiment, the case where the second light emitting unit 47 and the second light emitting unit 50 are disposed on the back surface 222a has been described, but the present invention is not limited to this. Fig. 9 is a schematic cross-sectional view of a lighting device according to a modification of the second embodiment.

The lighting device 1E shown in fig. 9 has the same configuration as the lighting device 1D except that the second light emitting portion 47 and the second light emitting portion 50 are disposed on the outer surface 221a of the neck portion 221. When the second light emitting unit 47 and the second light emitting unit 50 are disposed on the outer surface 221a of the neck 221 as described above, the light from the second light emitting unit 47 and the second light emitting unit 50 is irradiated from between the ceiling 90 and the back surface 222a so as to extend in the horizontal direction. Thereby, compared to the illumination device 1D shown in fig. 8, the illumination can reach a position illuminated to a distant from the illumination device 1E, and therefore the feeling of unity between the ceiling 90 and the illumination device 1E is improved.

In this manner, the light source unit of the embodiment is disposed outside the image optical path 75 of the projector 70, and emits light when an image is projected. This makes it possible to provide the illumination device 1D and the illumination device 1E having high added value.

In the above embodiment, the case where the first light-emitting element 43a and the first light-emitting element 46a are primary color light sources and the third light-emitting element 43c and the third light-emitting element 46c are white light sources has been described, but the present invention is not limited to this, and the first light-emitting element 43a and the first light-emitting element 46a may be a white light source and the third light-emitting element 43c and the third light-emitting element 46c may be a primary color light source. By using the first light-emitting elements 43a and 46a as white light sources as described above, the feeling of integration of the ceiling 90 with the lighting devices 1D and 1E is improved.

The light from the second light-emitting element 43b and the second light-emitting element 46b may be irradiated into the first region R1, the second region R2, or both the first region R1 and the second region R2. The second light emitting element 43b and the second light emitting element 46b are described as white light sources, but the present invention is not limited thereto, and may be primary color light sources. The second light emitting elements 43b and 46b may not be provided.

in the above embodiment, the case where the first light-emitting units 41 and 44 have light source rows arranged in a predetermined direction has been described, but the present invention is not limited to this, and for example, a plurality of white light sources may be provided which are randomly arranged on the substrates 42 and 45.

In the above embodiment, the case where the second light emitting unit 47 and the second light emitting unit 50 have the primary color light sources has been described, but the present invention is not limited thereto, and may have a white light source, for example.

[ third embodiment ]

Next, a configuration example of the illumination device according to the third embodiment will be described with reference to fig. 10. Fig. 10 is a schematic sectional view of a lighting device of a third embodiment.

As shown in fig. 10, the lighting device 1F includes: the mounting portion 10, the frame body 20, the main body portion 30, the light emitting portion 40, the cover 60, the decorative frame portion 65, the projector 70, the lens member 72, the light shielding portion 80, the first power supply portion 100, and the second power supply portion 105.

The mounting portion 10 is an adapter for fixing the lighting device 1 to a ceiling-mounted lamp panel, not shown. For example, the lighting device 1F operates by electric power supplied from the ceiling lamp panel through the mounting portion 10. The power source for operating the projector 70 may be different from the ceiling-mounted lamp.

The housing 20 is made of, for example, a resin material or a metal material, is formed in a substantially inverted conical shape, and houses various devices therein. The housing 20 includes a front surface 21, a side surface 22, and a rear surface 23. The front surface portion 21 is formed in a flat plate shape, for example. The side surface portion 22 is formed to extend continuously and upwardly from the outer edge of the front surface portion 21. The rear surface portion 23 is formed to extend continuously from the upper end of the side surface portion 22 toward the center of the lighting device 1F.

The housing 20 forms a space S inside thereof by the front surface portion 21, the side surface portion 22, and the rear surface portion 23, and accommodates the projector 70 and a second power supply unit 105 described later in the space S.

The second power supply unit 105 is connected to a commercial ac power supply via the mounting unit 10, and receives the commercial ac power supply to generate a dc output. The second power supply unit 105 is configured to supply a dc output to the projector 70 and to control the operation of the projector 70. The second power supply unit 105 is an example of a control unit.

Although not shown, the housing 20 may contain a heat radiation fan or the like for discharging heat discharged from the projector 70 or heat generated in the second power supply unit 105 to the outside of the housing 20. Further, a slit (not shown) for heat radiation may be formed in the housing 20. The slit may be formed in the side surface portion 22 or the back surface portion 23 of the housing 20, for example. In addition, the number or position of the slits may be set arbitrarily.

The mounting portion 10 is provided on the back surface portion 23. Therefore, the housing 20 is mounted on the mounting surface 91 of the ceiling 90 via the mounting portion 10.

The side surface portion 22 includes a cylindrical portion 22a and a tapered portion 22 b. The cylindrical portion 22a is a substantially cylindrical portion having a lower end continuous with the outer edge of the front surface portion 21 and an upper end continuous with the lower end of the tapered portion 22 b.

the tapered portion 22b has a lower end continuous with the upper end of the cylindrical portion 22a, and an upper end continuous with the outer edge of the back surface portion 23. The tapered portion 22b is formed to be inclined outward in side view as it goes to the upper end. The tapered portion 22b is formed in the above shape, and reflects light from the light emitting portion 40, which will be described later.

In the front face portion 21, an opening is formed, for example, near the center, and a lens member 72 connected to the projector 70 is inserted through the opening. In the above description, the lens member 72 is inserted into the opening of the front portion 21, but the present invention is not limited to this, and for example, a part of the projector 70 may be inserted into the opening of the front portion 21, and in short, the image from the projector 70 housed in the housing 20 may be output to the cover 60 side.

A main body 30 described later is connected to the front portion 21 of the housing 20. The frame body 20 and the main body 30 are formed as separate bodies, but may be formed integrally.

The main body 30 is a chassis formed in a disc shape, for example, including a material (metal material or the like) having relatively high thermal conductivity. For example, the body portion 30 has a front face 30a and an opposing face 30 b. In the main body 30, the front face 30a is a face on the cover 60 side. The facing surface 30b is a back surface opposite to the front surface 30a, and is also a surface facing the mounting surface 91 of the ceiling 90.

A first light emitting unit 41 described later is provided on the front surface 30a side of the main body 30, and a second light emitting unit 50 and a first power supply unit 100 described later are provided on the facing surface 30b side. Therefore, heat generated by light emission of the first light emitting part 41 or the second light emitting part 50 or heat generated in the first power supply part 100 is dissipated via the main body part 30.

First power supply unit 100 is connected to a commercial ac power supply via mounting unit 10, and receives the commercial ac power supply to generate a dc output. The first power supply unit 100 is configured to supply a dc output to the light emitting unit 40 and perform lighting control or dimming control independently for each of the first light emitting unit 41 and the second light emitting unit 50. The first power supply unit 100 is an example of a control unit.

To explain the main body 30 in more detail, the main body 30 includes a flat portion 31, a concave portion 32, and an outer edge portion 33.

The flat portion 31 is located near the center of the lighting device 1F, and is formed to extend along the XY plane, for example, in a flat plate shape. The flat portion 31 is formed in a rectangular shape in a plan view, but is not limited thereto, and may have another shape such as a circular shape in a plan view.

In the flat portion 31, an opening 31a is formed, for example, near the center. For example, the lens member 72 is inserted through the opening 31a of the flat portion 31. The light shielding portion 80 is attached to the opening 31a or the vicinity of the opening 31a of the flat portion 31, which will be described later.

The recess 32 is provided continuously with the outer edge side of the flat portion 31, and is recessed so as to protrude downward from the flat portion 31 in a side view. For example, the recess 32 has a first wall surface 32a, a bottom surface 32b, and a second wall surface 32 c.

The first wall surface 32a is formed to extend downward continuously from the outer edge of the flat portion 31. The bottom surface 32b is formed to be continuous from the first wall surface 32a and extend outward along the XY plane. The second wall surface 32c is formed to extend continuously and upward from the outer edge of the bottom surface 32 b.

Since the first wall surface 32a is continuous from the flat portion 31, the shape of the first wall surface 32a in a plan view is a rectangular shape corresponding to the shape of the flat portion 31. The shape of the second wall surface 32c in a plan view is, for example, circular.

The outer edge 33 is provided continuously with the outer edge side of the recess 32, and forms the outer edge of the main body 30. The shape of the outer edge portion 33 in a plan view is, for example, circular.

The main body 30 formed as described above is provided with the light emitting section 40. The light emitting section 40 includes a first light emitting section 41 and a second light emitting section 50.

The first light emitting unit 41 is provided on the front surface 30a side of the main body 30, for example, on the front surface side of the recess 32, and is disposed outside the opening 31a so as to face each other with the opening 31a interposed therebetween.

The first light emitting unit 41 includes a substrate 42, a first light emitting element 43a, a second light emitting element 43b, and a third light emitting element 43 c. The substrate 42 is disposed so as to join a plurality of (for example, four) substantially arc-shaped substrates having a predetermined width dimension, and is formed in a substantially ring shape as a whole. That is, the substrate 42 formed in a substantially annular shape as a whole includes a substrate divided into a plurality of pieces, and a part of the substrate is illustrated in fig. 10.

The first light emitting section 41 emits light from the light emitting surface 41a by the light emission of the first to third light emitting elements 43a to 43c, and illuminates the room in which the lighting device 1F is installed. The first to third light emitting elements 43a to 43c are examples of illumination light sources.

The first to third light-emitting elements 43a to 43c of the first light-emitting unit 41 can emit light when an image is projected from the projector 70 onto the cover 60. The first to third light emitting elements 43a to 43c are examples of the light source section.

The second light emitting unit 50 is provided on the facing surface 30b side of the main body 30. For example, the second light emitting unit 50 is provided in plural on the back surface side of the recess 32 of the main body 30, specifically, on the second wall surface 32c of the recess 32. Further, a cover having translucency may be disposed in the recess 32 provided with the second light emitting unit 50 so as to cover the recess 32.

The second light emitting section 50 includes a substrate 51 and a fourth light emitting element 52 mounted on a mounting surface of the substrate 51. A plurality of second light emitting units 50 are attached to the second wall surface 32c of the recess 32 of the main body 30. Here, since the second wall surface 32c of the recess 32 is circular in plan view as described above, the second light emitting portions 50 are arranged in a substantially annular light source row. The second light emitting unit 50 is provided such that the light emitting surface 50a faces from the outer edge side of the main body 30 to the center side.

The second light emitting unit 50 emits light from the light emitting surface 50a by the light emission of the fourth light emitting element 52, and illuminates a space between the facing surface 30b and the mounting surface 91 of the ceiling 90. The fourth light emitting element 52 is an example of an indirect light source.

The substrate 42 and the first to third light-emitting elements 43a to 43c of the first light-emitting portion 41, and the substrate 51 and the fourth light-emitting element 52 of the second light-emitting portion 50 may be made of the same material and have the same structure as the substrate 42, the first to third light-emitting elements 43a to 43c, and the substrate 51 and the fourth light-emitting element 52 of the first light-emitting portion 41, and the second light-emitting portion 50, respectively, of the lighting device 1D shown in fig. 8, for example. Therefore, detailed description of the first and second light emitting portions 41 and 50 is omitted.

Here, "indirect light" as light emitted from the second light emitting unit 50 will be described with reference to fig. 10. In the present embodiment, indirect light is emitted from the fourth light emitting element 52 of the second light emitting unit 50 toward the space between the facing surface 30b and the mounting surface 91, and then reflected by the tapered portion 22b of the housing 20 and the like.

Specifically, the housing 20 is disposed between the facing surface 30b of the main body 30 on which the second light emitting unit 50 is provided and the mounting surface 91 of the ceiling 90. Therefore, the side surface portion 22 of the housing 20 is also positioned between the facing surface 30b of the main body 30 and the mounting surface 91. As described above, the tapered portion 22b of the side surface portion 22 is formed so as to incline outward in side view as it goes to the upper end, in other words, so as to incline outward in side view as it separates from the second light emitting portion 50. In other words, the tapered portion 22b is inclined so that the surface (outer surface) thereof faces the second light emitting portion 50 located below.

Thus, the light emitted from the second light emitting unit 50 passes through the space between the facing surface 30b and the mounting surface 91 as shown by an arrow a1 in fig. 10, and is reflected by the tapered portion 22b and returns to the space.

As described above, in the present embodiment, since the indirect light of the second light emitting unit 50 is reflected by the tapered portion 22b of the housing 20, the space between the facing surface 30b of the main body 30 and the mounting surface 91 can be made brighter on the back surface side of the illumination device 1F than in the case where no indirect light is reflected. Thus, in the lighting device 1F, the effect of a show or decoration caused by indirect light can be improved.

The inclination angle of the tapered portion 22b may be set to any value. For example, the inclination angle of the tapered portion 22b may be set to a value such that the indirect light from the second light emitting portion 50 is efficiently reflected toward the space between the facing surface 30b and the mounting surface 91, or may be set to a value such that the indirect light is efficiently reflected toward the decorative frame portion 65 described later.

The color of the frame body 20, specifically, the color of the tapered portion 22b of the frame body 20 may be set to any color, and for example, a color having a relatively high reflectance of light (for example, white) may be set to reflect indirect light.

As described above, the second light emitting unit 50 of the present embodiment is provided so that the light emitting surface 50a faces from the outer edge side of the main body 30 toward the center side, in other words, toward the center side where the tapered portion 22b of the housing 20 is located. Thus, in the present embodiment, since indirect light of the second light emitting unit 50 can be reflected more easily by the tapered portion 22b, the space between the facing surface 30b of the main body unit 30 and the mounting surface 91 can be effectively made bright. Thus, in the lighting device 1F, the effect of a show or decoration by indirect light can be further improved.

In addition, in the housing 20, the tapered portion 22b is formed, so that heat dissipation in the housing 20 can be improved. That is, since the tapered portion 22b is formed to be inclined outward in a side view as it goes to the upper end, the space S of the housing 20 has a shape that widens in a side view as it goes upward.

Therefore, in the present embodiment, for example, heat discharged from the projector 70 housed in the housing 20 can be diffused upward of the space S widened by the tapered portion 22B as shown by an arrow B in fig. 10, and can be radiated from a slit (not shown) or the like of the rear surface portion 23. In this way, in the present embodiment, by providing the tapered portion 22b, the heat in the housing 20 is easily dissipated and discharged, and the heat dissipation performance in the housing 20 can be improved as compared with a case where the tapered portion 22b is not formed in the housing 20.

In the present embodiment, for example, when the projector 70 includes a speaker or the like (not shown) that outputs sound, the sound output from the speaker can be efficiently transmitted to the user. That is, in the housing 20 of the present embodiment, by forming the tapered portion 22b so as to be inclined, the sound output from the speaker can be made to collide with the tapered portion 22b and be made to sound, and therefore, the sound can be efficiently transmitted to the user.

The cover 60 is, for example, a so-called globe made of a light-transmitting milky resin. The cover 60 is positioned so that the inner surface 63 side faces the front surface 30a of the main body 30, and is provided so as to cover the main body 30 or the first light-emitting unit 41 from the front surface side, that is, the emission surface side of the first light-emitting unit 41. Further, since the lens member 72 connected to the projector 70 is disposed near the center of the main body 30, the cover 60 may be disposed so as to cover the lens member 72 from the light emitting surface side.

The cover 60 is formed in a circular shape in a plan view, for example. The outer surface 64 of the cover 60 constitutes the front surface side of the lighting device 1F, and the outer surface 64 is formed in a curved shape protruding downward smoothly, in other words, in a dome shape. The curvature of the cover 60 may be, for example, R400 to R1700. The cover 60 diffuses the light output from the first light emitting portion 41, thereby widening the illumination range and improving the uniformity. Further, by using such a cover 60, even when a light emitting element such as an LED that outputs light having high linearity is used, the granular sensation of light used for illumination can be reduced. Further, the image output from the projector 70 is projected onto the cover 60 configured as described above.

In addition, the appearance of the image projected from the projector 70 onto the cover 60 may vary depending on the angle of recognition by the user. For example, the image projected onto the cover 60 can be clearly recognized when the illumination device 1F is viewed from directly below, but the image projected onto the cover 60 can be clearly recognized when the illumination device 1F is viewed obliquely. This point will be described with reference to fig. 11 to 14.

Fig. 11 is a schematic diagram showing an example of a projection image for evaluation test. The projected image shown in fig. 11 has a plurality of color sections 150 and character sections 160. In the example shown in fig. 11, a total of 24 color portions 150 are arranged vertically and horizontally, and are colored so that the colors or the saturation thereof are different from each other. In addition, a plurality of characters are arranged in the character portion 160.

The projected image shown in fig. 11 was projected from the projector 70 onto the cover 60, and the appearance thereof was evaluated by visual observation. Fig. 12 is a diagram showing a relationship between the evaluation index and the score. In the example shown in fig. 12, the projection image for evaluation test projected from the projector 70 onto the cover 60 is evaluated in five stages of scores of 1 to 5. The index of evaluation of each score is as follows. And 5, dividing: the text of the text portion 160 can be clearly seen. And 4, dividing: the text of the text portion 160 is blurred. And 3, dividing: the characters in the character part 160 can be (barely) seen. And 2, dividing: the color of the colored portion 150 is known (the text of the text portion 160 is not visible). 1 minute: there is a portion where the color of the colored portion 150 is unknown.

Next, the difference in appearance of the image projected onto the cover 60 will be described with reference to fig. 13 and 14. Fig. 13 and 14 are graphs showing the relationship between the total light transmittance and the score of the cover. Fig. 13 shows a case where the illumination device 1F that projects the projection image shown in fig. 11 from the projector 70 onto the cover 60 is viewed from directly below, and fig. 14 shows a case where the same illumination device 1F as that shown in fig. 13 is viewed from an oblique angle of 45 °. In fig. 13 and 14, each point indicated by a black dot is obtained by averaging scores obtained by evaluating the total light transmittance of the cover 60, and each line segment is obtained by approximating the obtained value by a polynomial expression.

As shown in fig. 13, when the lighting device 1F is viewed from directly below, the score of the score increases in accordance with the increase in the total light transmittance of the cover 60. On the other hand, as shown in fig. 14, when the lighting device 1F is viewed obliquely, the score increases in accordance with the increase in the total light transmittance of the cover 60, and when the total light transmittance exceeds 50%, the score decreases. In particular, if the total light transmittance exceeds 80%, the score is significantly decreased. Therefore, in the illumination device 1F of the present embodiment, by using the cover 60 having the total light transmittance of 30% or more and 80% or less, the image projected on the cover 60 can be easily recognized regardless of the positional relationship between the user and the illumination device 1F.

Returning to fig. 10, the lighting device 1F will be further described. The decorative frame portion 65 is an annular member disposed on the outer edge 60c side of the cover 60 and outside the main body portion 30 in a side view. The decorative frame portion 65 is made of, for example, a translucent or transparent white resin. The decorative frame portion 65 is an example of a light-transmitting portion.

The decorative frame portion 65 is formed integrally with the cover 60, but may be formed separately from the cover 60. The decorative frame portion 65 is formed separately from the main body portion 30, but may be formed integrally with the main body portion 30. In the above description, the color and material of the decorative frame portion 65 and the cover 60 are specifically shown, but the color and material are merely exemplary and not limitative.

The decorative frame portion 65 is disposed on the outer edge 60c side of the cover 60 and outside the main body portion 30 where the second light emitting portion 50 is provided, and therefore, light from the second light emitting portion 50 can be transmitted therethrough. Specifically, for example, the indirect light emitted from the second light emitting unit 50 or the indirect light reflected by the tapered portion 22b of the frame body 20 is transmitted through the decorative frame portion 65 (see arrow a2 in fig. 10).

In the illumination device 1F of the present embodiment, the indirect light of the second light emitting portion 50 is transmitted through the decorative frame portion 65, whereby the indirect light can be made to have the extensibility toward the outside of the illumination device 1F, and as a result, the effect of the rendering or the decoration by the indirect light can be further improved.

The annularly formed decorative frame portion 65 has an outer edge portion 65a in an outer portion in a side view. For example, the outer edge portion 65a is formed to extend from the cover 60 toward the mounting surface 91 of the ceiling 90, in other words, to extend upward.

Specifically, the outer edge portion 65a of the decorative frame portion 65 extends from the cover 60 toward the mounting surface 91, and is formed to be inclined outward in a side view. The outer edge portion 65a is curved so as to protrude outward in a side view.

By forming the decorative frame portion 65 as described above, the indirect light emitted from the second light emitting portion 50 or the indirect light reflected by the tapered portion 22b can be efficiently received and transmitted. This makes the decorative frame portion 65 brighter, thereby allowing the indirect light to have a further spreading property, and further improving the effect of rendering by the indirect light of the lighting device 1F.

The shape of the decorative frame portion 65 including the outer edge portion 65a is not limited to the above shape, and for example, the outer edge portion 65a may have another shape such as a tapered shape without being bent.

As described above, in the present embodiment, the first light-emitting unit 41 or the second light-emitting unit 50, that is, the light-emitting unit 40 is provided closer to the outer edge 33 than the central portion of the main body 30 facing the housing 20 in a plan view, and therefore the light-emitting unit 40 is disposed apart from the housing 20 and the mounting surface 91. Therefore, in illumination device 1F of the present embodiment, both the heat radiation performance of light emitting section 40 and the brightness ensured by mounting surface 91 of second light emitting section 50 can be achieved.

Next, the projector 70, the lens member 72, and the light shielding portion 80 will be described in detail. The projector 70 outputs an image and projects the image onto the cover 60 from the inner surface 63 side (rear surface side). The projector 70 may include a speaker or the like that outputs sound in conjunction with the video, for example.

The lens member 72 is disposed on the image optical path of the projector 70, and diffuses and emits the image output from the projector 70. For example, the lens member 72 is inserted into the opening 31a formed in the flat portion 31 of the main body 30, and is disposed such that the output surface 72a faces the inner surface 63 of the cover 60. The lens member 72 may be a fish-eye lens, but is not limited thereto, and other types of lenses such as a wide-angle lens may be used.

The lens member 72 may be directly attached to the projector 70, for example, may be attached to the main body 30, and in short, may be provided on the image optical path of the projector 70.

The light shielding portion 80 is disposed near the lens member 72, and shields a part of the image emitted from the lens member 72. Accordingly, since the image shielded by the light shielding portion 80 is projected onto the cover 60, the image outputted from the projector 70 can be appropriately projected onto the cover 60.

The light shielding portion 80 includes a resin material or a metal material having light shielding properties. Since the light shielding portion 80 can shield a part of the diffused image, it is not necessary to have light shielding properties as a whole, and at least a part of the whole may have light shielding properties.

The light shielding portion 80 is formed in a cylindrical shape having an opening 80a, for example, and the lens member 72 is disposed inside thereof. Also, the image (i.e., the diffused image) that has been emitted from the lens member 72 passes through the opening 80 a.

Here, the cylindrical shape as the shape of the light shielding portion 80 is a shape corresponding to the shape of the cover 60. That is, since the cover 60 is formed in a circular shape in a plan view, the light shielding portion 80 is formed in a cylindrical shape corresponding to the shape of the cover 60.

Thereby, a light-shielded image whose outer shape is circularly shielded by the light-shielding portion 80 is projected onto the cover 60 which is circular in a plan view. In this way, the shape of the cover 60 is made similar to the shape of the light-shielded image shielded by the light-shielding portion 80, whereby the design or visibility of the image (light-shielded image) projected onto the cover 60 can be improved.

In addition, since the middle cover 60 is circular, the light shielding portion 80 is formed in a cylindrical shape, but the present invention is not limited thereto. That is, for example, when the cover 60 is rectangular in plan view, the light shielding portion 80 may be formed in a rectangular cylinder shape, or when the cover 60 is elliptical in plan view, the light shielding portion 80 may be formed in an elliptical cylinder shape, or the like, and the light shielding portion 80 may be formed in a shape corresponding to the shape of the cover 60 as follows. Thus, as described above, the shape of the mask 60 is similar to the shape of the light-shielded image, and the design of the image projected onto the mask 60 can be improved.

The light shielding portion 80 is provided such that the opening 80a is located closer to the cover 60 (i.e., below) than a plane including the emission surface 72a of the lens member 72 (e.g., a horizontal plane (XY plane) including the emission surface 72 a). Thus, the light shielding portion 80 can reliably shield a part of the diffused image emitted from the emission surface 72a of the lens member 72.

The light shielding portion 80 is provided such that the opening 80a is located closer to the lens member 72 side than a plane including the light emitting surface 41a of the first light emitting portion 41 (e.g., a horizontal plane (XY plane) including the light emitting surface 41 a). Thus, for example, in the case where light is emitted from the light emitting surface 41a of the first light emitting unit 41 to illuminate the room, the light from the light emitting surface 41a is prevented from being applied to the light shielding unit 80, and the light of the first light emitting unit 41 is not necessarily shielded.

in the above description, the light shielding portion 80 is provided so that the opening 80a is positioned closer to the lens member 72 side than the plane including the light emitting surface 41a of the first light emitting portion 41, but the present invention is not limited to this, and the light shielding portion 80 may be provided so that the opening 80a is positioned on the same plane as the plane including the light emitting surface 41 a.

Here, the first light emitting unit 41 may emit light when an image is projected from the projector 70 onto the cover 60, as described above. For example, the first light emitting unit 41 may improve the rendering effect of the image by illuminating the periphery of the image projected onto the mask 60 with a color corresponding to the image.

When an image is projected from the projector 70 onto the cover 60, the first light-emitting portion 41 may emit light toward a region of the cover 60 including a portion where the image is not projected due to light shielding by the light shielding portion 80.

This makes it possible to illuminate a portion darkened by light shielding by the light shielding portion 80, and thus the influence of light shielding by the light shielding portion 80 can be reduced.

Here, the distance from the emission surface 72a of the lens member 72 to the inner surface 63 of the cover 60, that is, the distance b between the lens member 72 and the cover 60 may be set to any value according to, for example, the size of the cover 60 to which an image is projected, the focal length of the projector 70 or the lens member 72, and the like. Specifically, when the diameter of the decorative frame portion 65 facing the cover 60, that is, the outer diameter a of the cover 60 is 600mm, the focal length of the projector 70 is 15mm, the distance b is 90mm to 110mm, and the magnification of the lens member 72 is 0.14 to 0.18. When the outer diameter a is 470mm, the focal length of the projector 70 is 15mm, the distance b is 70mm to 90mm, and the magnification of the lens member 72 is 0.14 to 0.18. By defining the values including the outer diameter a and the distance b as described above, an image can be displayed on the entire cover 60, for example. However, of course, is not limited by the value. For example, the outer diameter a of the cap 60 may be within a range of ± 65mm of the above-mentioned dimension. In addition, the focal length of the projector 70 may be set to ± 12% to 18% of the 15mm as an allowable range. Further, for example, when a short focus lens having a relatively short focal length (for example, about 4 mm) of the projector 70 is used, the magnification of the lens member 72 may be set to a value different from the above range.

In this manner, the cover 60 of the embodiment is formed of a translucent member having a total light transmittance of 30% to 80%. Therefore, the user can recognize the image projected on the cover no matter the position relation with the lighting device, and the lighting device with high added value can be provided.

In the above embodiment, the second light emitting unit 50 is provided on the second wall surface 32c of the recess 32, but the present invention is not limited to this, and for example, the second light emitting unit 50 may be provided on the second wall surface 32a of the recess 32, and the light emitting surface 50a may be directed from the center side toward the outer edge side of the main body 30. In this case, for example, if the light-transmitting portion is provided in a part of the second wall surface 32c, the light from the second light-emitting portion 50 can be efficiently irradiated to the decorative frame portion 65 through the light-transmitting portion of the second wall surface 32 c. Further, the light can be efficiently emitted to the space formed between the decorative frame portion 65 and the mounting surface 91 of the ceiling 90.

In the above embodiment, the light shielding portion 80 is formed in a shape corresponding to the shape of the cover 60, but the present invention is not limited thereto, and the light shielding portion 80 may be formed in a shape not corresponding to the shape of the cover 60.

The shape of the frame 20 is not limited to the shape shown in fig. 10. For example, in the frame 20, the tapered part 22b is formed above the side surface part 22 in the above-described embodiment, but the tapered part 22b may be formed below the side surface part 22. The side surface portion 22 of the housing 20 may include only the cylindrical portion 22a without the tapered portion 22 b.

[ Lighting System ]

Next, a configuration example of the illumination system according to the embodiment will be described with reference to fig. 15. Fig. 15 is a diagram showing an outline of the illumination system of the embodiment.

The illumination system 300 shown in fig. 15 includes an illumination device 1G and a detection device 190. The detection means 190 detects motion information from the gesture of the user 310. The detection device 190 may be various sensors such as a so-called gesture sensor, a motion sensor, and an acceleration sensor, or may be an imaging device that images the motion of the user 310. The detection device 190 may be a combination of the various sensors and the imaging device.

The lighting device 1G and the detection device 190 are connected by wireless or wired connection. The lighting device 1G is, for example, a lighting device 1F shown in fig. 10. The illumination device 1G controls the light source unit (light emitting unit 40) and the projector 70 by operating the first power supply unit 100 and the second power supply unit 105, which are examples of the control unit, based on the operation information detected by the detection device 190. Therefore, even if the user 310 is difficult to operate the remote controller or input voice, for example, the user can perform an operation such as switching the light emitting unit 40 or the projector 70.

In the illumination system 300 shown in fig. 15, the case where the detection device 190 is a different body from the illumination device 1G has been described, but the present invention is not limited to this, and for example, the illumination device 1G may include a detection unit having a function corresponding to the detection device 190. As the illumination device 1G shown in fig. 15, the illumination device 1, the illumination devices 1A to 1E may be applied.

In the above embodiments, the case where the lighting device 1 and the lighting devices 1A to 1G are mounted on the ceiling 90 of the room has been described, but the lighting device 1 and the lighting devices 1A to 1G may be mounted on a side wall of the room.

In the above embodiments, the case where the illumination device 1 and the illumination devices 1A to 1G are ceiling lamps circular in plan view has been described, but they may be other shapes such as rectangular or elliptical. For example, the illumination device 1 and the illumination devices 1A to 1G may be illumination devices including a frame body having an opening and being rectangular in a plan view, and having a plurality of rows of light emitting elements provided so as to sandwich the opening.

In the above embodiments, the case where the illumination device 1 and the illumination devices 1A to 1G include one projector 70 has been described, but a plurality of projectors 70 may be included.

Although the embodiments of the present invention have been described, the embodiments are presented as examples, and are not intended to limit the scope of the invention. The above embodiment can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications are included in the invention described in the claims and the equivalent range thereof, as well as in the scope and gist of the invention.

Claims (10)

1. An illumination device, comprising:

A light source unit having a light source for illumination;

A cover for covering the illumination light source from an emission surface side; and

And a projector for projecting an image from the illumination light source side onto the cover.

2. The lighting device of claim 1,

Includes a lens member disposed on an image optical path of the projector, diffusing an image output from the projector, and

The lens member projects the image in an area of 50% or more of a front face of the cover.

3. A lighting device as recited in claim 1 or claim 2,

The projector is housed in a housing in which the illumination light source is disposed.

4. A lighting device as recited in claim 1 or claim 2,

The light source unit has a white light source array in which a plurality of white light sources are arranged.

5. A lighting device as recited in claim 1 or claim 2,

The light source unit has a primary color light source array in which a plurality of primary color light sources are arranged.

6. The lighting device of claim 5,

The primary color light source row is disposed on the outermost side among the plurality of light source rows.

7. The lighting device of claim 2,

The lens member includes a fisheye lens or a wide-angle lens mounted on the projector.

8. A lighting device as recited in claim 1 or claim 2,

The cover is formed of a translucent member having a total light transmittance of 30% to 80%.

9. A lighting device as recited in claim 1 or claim 2, comprising:

A detection unit that detects motion information of a user; and

And a control unit that controls one or both of the light source unit and the projector based on the operation information detected by the detection unit.

10. An illumination system, comprising:

A detection device that detects motion information of a user; and

The illumination device according to any one of claims 1 to 8, wherein the illumination device controls one or both of the light source unit and the projector according to the operation information detected by the detection device.