Illumination device

Abstract

To provide an illumination device capable of achieving further energy savings.SOLUTION: An illumination device 1 includes: multiple light sources 101b; a control unit 41 for controlling the lighting of each of multiple light sources 101b; a light-blocking material 20 for blocking the light emitted from some light sources 101b out of the multiple light sources 101b; and a detection unit 42 that detects at least one of the amount of the light reflected by the light-blocking material 20 and the amount of light transmitted through the light-blocking material 20. The control unit 41 is configured to identify a light source 101b based on the light intensity detected by the detection unit 42, the light emitted from multiple light sources 101b to be blocked by the light blocking material 20 and the current supply to the identified light source 101b is cut off.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a lighting fixture capable of projecting a projected image onto an illuminated surface. [Background technology]

[0002] 2. Description of the Related Art In recent years, in the fields of stage lighting and signage, light emitted from a light source is partially blocked to control the shape of light irradiated onto an irradiation surface.

[0003] For example, Patent Document 1 discloses an illumination optical system having a light-emitting element array in which multiple light-emitting elements are arranged two-dimensionally, and a control unit that controls the lighting / non-lighting of each light-emitting element of the light-emitting element array in accordance with a desired optical contrast. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-330154 A Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, due to growing environmental awareness, there is a demand for further energy saving in the illumination optical system of Patent Document 1.

[0006] Therefore, the present disclosure provides a lighting fixture that can achieve further energy savings. [Means for solving the problem]

[0007] A lighting device according to one aspect of the present disclosure includes a plurality of light sources, a control unit that controls the lighting of each of the plurality of light sources, a shading member that blocks light emitted by some of the plurality of light sources, and a detection unit that detects at least one of the amount of light reflected by the shading member and the amount of light that transmits through the shading member, and the control unit identifies a light source among the plurality of light sources whose light emitted from the light source is blocked by the shading member based on the amount of light detected by the detection unit, and cuts off the supply of current to the identified light source. Effect of the Invention

[0008] According to the lighting fixture according to the present disclosure, further energy savings can be achieved. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a lighting fixture according to an embodiment. [Diagram 2] FIG. 2 is a block diagram showing a lighting fixture according to the embodiment. [Figure 3A] FIG. 3A is a cross-sectional view showing a lighting device according to an embodiment and a diagram showing a projected light image. [Figure 3B] FIG. 3B is another cross-sectional view showing the lighting device according to the embodiment and a projected light image. [Figure 3C] FIG. 3C is a diagram showing yet another cross-sectional view of the lighting device according to the embodiment and a projected light image. [Figure 4] FIG. 4 is a schematic diagram showing a plurality of light source IDs, the coordinates of each of the plurality of light sources, and the determination results. [Diagram 5] FIG. 5 is a diagram showing a plurality of light sources, which light sources are turned on and which light sources are not turned on according to a pattern. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiment will be specifically described with reference to the drawings.

[0011] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, components, arrangement positions and connection forms of the components, etc., shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in the independent claims are described as optional components.

[0012] In addition, each figure is a schematic diagram and is not necessarily illustrated precisely. Therefore, for example, the scales in each figure do not necessarily match. In addition, in each figure, substantially the same configurations are given the same reference numerals, and duplicated explanations are omitted or simplified.

[0013] In the following embodiments, expressions such as "cylindrical" are used. For example, "cylindrical" does not only mean that the body is completely cylindrical, but also means that the body is substantially cylindrical, that is, includes an error of, for example, about several percent. Furthermore, "cylindrical" means that the body is cylindrical within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "shape."

[0014] (Embodiment) <Configuration> First, the configuration of lighting device 1 according to the present embodiment will be described with reference to FIGS. 1 to 3C.

[0015] Fig. 1 is a schematic diagram showing a lighting fixture 1 according to an embodiment. Fig. 2 is a block diagram showing a lighting fixture 1 according to an embodiment. Fig. 3A is a cross-sectional view showing a lighting fixture 1 according to an embodiment and a projected light image. Fig. 3B is another cross-sectional view showing a lighting fixture 1 according to an embodiment and a projected light image. Fig. 3C is yet another cross-sectional view showing a lighting fixture 1 according to an embodiment and a projected light image.

[0016] 3A of the present embodiment illustrates a case in which the detection unit 42 is disposed on the light shielding member 20 opposite the light source 101b side so as to be able to detect the amount of light transmitted through the light shielding member 20. FIG. 3B illustrates a case in which the detection unit 42 is disposed on the light source 101b side of the light shielding member 20 so as to be able to detect the amount of light transmitted through the light shielding member 20. FIG. 3C illustrates a case in which the detection unit 42 is disposed on both the light source 101b side and the opposite side of the light shielding member 20 so as to be able to detect the amount of light transmitted through the light shielding member 20.

[0017] As shown in FIGS. 1 and 2, the lighting fixture 1 includes a gobo filter device 10, a lighting device 100, a control unit 41, one or more detection units 42, and a memory unit 43.

[0018] The gobo filter device 10 is attached to the lighting device 100. The gobo filter device 10 is detachable from the lighting device 100. The gobo filter device 10 may be configured integrally with the lighting device 100.

[0019] The gobo filter device 10 is disposed in the direction of light emitted from the lighting device 100, and can transmit the light emitted by the lighting device 100. The gobo filter device 10 can also block the light emitted by the lighting device 100 by being attached to the lighting device 100. Specifically, when a part of the light emitted by the lighting device 100 passes through the inside of the gobo filter device 10, the gobo filter device 10 can block a part of the light that passes through. When the light that has passed through the gobo filter device 10 is irradiated onto an irradiation surface, a shadow and a color appear on the irradiation surface. In other words, the lighting device 100 can make a projected image appear with a shadow and a color when the light that has passed through the inside of the gobo filter device 10 is irradiated onto an irradiation surface. The projected image may be, for example, a character image, sunlight filtering through trees, light on the surface of water, or the like. In FIG. 1 and the like, a character image is illustrated as an example of the projected image.

[0020] 1 to 3C, the gobo filter device 10 includes a housing 10a, one or more light blocking members 20, a first lens 31, and a second lens 32. Note that, although the present embodiment illustrates an example in which the gobo filter device 10 includes the first lens 31 and the second lens 32, it is sufficient for the gobo filter device 10 to include only one of the first lens 31 and the second lens 32.

[0021] The housing 10a is detachable from the lighting device 100. The housing 10a may be detachable from the lighting device 100 by, for example, a fixing member such as a screw or a fastener, or may be detachable from the lighting device 100 by connecting a connecting portion formed on the housing 10a to a connected portion formed on the lighting device 100. For example, the connecting portion is a female screw, and the connected portion is a male screw.

[0022] The housing 10a is cylindrical and has openings at the front and rear ends so that light can pass through. In this embodiment, the housing 10a is a circular cylindrical body with openings at the front and rear ends, but it may be a polygonal cylindrical body. The rear end is the end where light enters the housing 10a and corresponds to the entrance 11 of the gobo filter device 10. The front end is the end where light that has passed through the housing 10a exits and corresponds to the exit 12 of the gobo filter device 10.

[0023] The housing 10a also houses a first lens 31, one or more light blocking members 20, a second lens 32, and one or more detectors 42. The second lens 32, the light blocking members 20, and the first lens 31 housed in the housing 10a are disposed within the housing 10a so that light entering the inside of the housing 10a can be emitted to the outside of the gobo filter device 10.

[0024] The light blocking member 20 is disposed between the first lens 31 and the second lens 32. The light blocking member 20 is provided detachably with respect to the housing 10a.

[0025] The light blocking member 20 can block a part of the light emitted by the lighting device 100. Specifically, the light blocking member 20 can block the light emitted by some of the light sources 101b among the plurality of light sources 101b included in the lighting device 100. That is, the light blocking member 20 has one or more holes 23 formed therein, and can block the light emitted by some of the light sources 101b among the plurality of light sources 101b, while transmitting the light emitted by the remaining light sources 101b among the plurality of light sources 101b.

[0026] The light blocking member 20 is made of a plate-like member. Specifically, the light blocking member 20 is made of a plate-like member made of metal such as aluminum or stainless steel, or a plate-like member made of glass.

[0027] A diffusion treatment may be applied to the surface of the light blocking member 20. This allows the light irradiated to the light blocking member 20 to be diffused by the surface of the light blocking member 20. The surface of the light blocking member 20 is the surface on the side of the multiple light sources 101b. The back surface of the light blocking member 20 may also be diffused.

[0028] The light shielding member 20 is one or more gobo filters in which one or more holes 23 are formed. The light shielding member 20 is, for example, a medium simulating a character image, a flower, a tree, and branches and leaves. In this embodiment, the light shielding member 20 has an outer shape of a ring. The size (opening area) of the hole 23 is set to a size that can transmit light emitted from at least one light source 101b when the light source 101b irradiates light onto the light shielding member 20. The portion of the light shielding member 20 other than the hole 23 has a size (surface area) that can block light emitted from at least one light source 101b.

[0029] The light blocking member 20 may have a frame and a simulated medium. The frame may be connectable to the inside of the housing 10a and may have a shape corresponding to the internal structure of the housing 10a. The simulated medium may be disposed inside the frame and integrally connected to the frame. For this reason, the frame and the simulated medium may be made of the same material.

[0030] In this way, when the light emitted by the lighting device 100 is irradiated onto the light-shielding member 20, the light-shielding member 20 can block part of the light, and therefore, the light and shadow created by the light-shielding member 20 can be displayed on the irradiated surface.

[0031] The light blocking member 20 may be mechanically swung by an actuator. That is, the light blocking member 20 may be formed to be partially swung by an external force from an actuator. When the light blocking member 20 is made of metal, the light blocking member 20 can be swung when an external force is applied to the light blocking member 20. When the light blocking member 20 swung, the projected image by the light emitted by the lighting device 100 irradiated on the irradiation surface moves randomly. When the light blocking member 20 imitates plants such as flowers, trees, and branches and leaves, a natural projected image can be reproduced when the light blocking member 20 is irradiated on the irradiation surface by oscillating the light blocking member 20 by an actuator.

[0032] The first lens 31 is disposed closer to the lighting device 100 than the light blocking member 20. Specifically, the first lens 31 is fixed to the housing 10a in a state where it covers an opening on one end side of the housing 10a, which is on the lighting device 100 side.

[0033] The first lens 31 is a projection lens or a field lens that transmits light emitted by the lighting device 100 and projects the light toward the light blocking member 20. In the present embodiment, the first lens 31 is a convex lens. The first lens 31 may have optical control functions such as wide-angle light distribution, narrow-angle light distribution, light attenuation, and light scattering.

[0034] The second lens 32 is disposed on the side of the light blocking member 20 opposite to the lighting device 100. Specifically, the second lens 32 is fixed to the housing 10a in a state in which the second lens 32 covers the opening on the other side of the housing 10a.

[0035] The second lens 32 is a projection lens or a field lens that transmits light emitted by the lighting device 100 and that has passed through the light blocking member 20, and can project a projected image onto an object. In other words, the second lens 32 can form an image of light on an irradiation surface. In this embodiment, the second lens 32 is a convex lens. The second lens 32 may have optical control functions such as wide-angle light distribution, narrow-angle light distribution, light reduction, and light scattering.

[0036] The first lens 31 and the second lens 32 are made of resin. The first lens 31 and the second lens 32 may be made of glass.

[0037] The lighting device 100 is attached to the gobo filter device 10. The lighting device 100 is, for example, a spotlight, a downlight, etc. The lighting device 100 has a light emitting module 101 and a power supply unit 102 for lighting.

[0038] The light emitting module 101 and the power supply unit 102 for lighting are housed in the light body of the lighting device 100. The light emitting module 101 has a substrate 101a and a plurality of light sources 101b. The substrate 101a is a mounting substrate having a mounting surface for mounting the plurality of light sources 101b arranged in a matrix. Each of the plurality of light sources 101b has an LED chip and a phosphor that emits fluorescent light by wavelength conversion of the light emitted by the LED chip. The light emitted by each of the plurality of light sources 101b is incident on the gobo filter device 10 attached to the lighting device 100. The light emitted by each of the plurality of light sources 101b is white light. The light emitted by the lighting device 100 is not limited to white light, and may be light of another color.

[0039] As shown in FIGS. 3A to 3C, the detection unit 42 can detect at least one of the amount of light reflected by the light shielding member 20 and the amount of light transmitted through the light shielding member 20. That is, the detection unit 42 is disposed on at least one of the light source 101b side of the light shielding member 20 and the side opposite to the light source 101b side of the light shielding member 20. Therefore, as shown in FIG. 3A, when the detection unit 42 is disposed on the light source 101b side of the light shielding member 20 in the housing 10a, the detection unit 42 can detect the amount of light reflected by the light shielding member 20. Also, as shown in FIG. 3B, when the detection unit 42 is disposed on the side opposite to the light source 101b side of the light shielding member 20 in the housing 10a, the detection unit 42 can detect the amount of light transmitted through the light shielding member 20. Furthermore, as shown in FIG. 3C, when the detection unit 42 is disposed on the side of the light shielding member 20 facing the multiple light sources 101b and on the side of the light shielding member 20 opposite the light source 101b, the detection unit 42 can detect the amount of light reflected by the light shielding member 20 and the amount of light transmitted through the light shielding member 20.

[0040] When the detection unit 42 detects the amount of light reflected by the light blocking member 20 and when the detection unit 42 detects the amount of light transmitted through the light blocking member 20 , the detection unit 42 outputs the detected amount of light to the control unit 41 .

[0041] The plurality of light sources 101b in the lighting device 100 are controlled by a control unit 41. The control unit 41 controls the lighting of each of the plurality of light sources 101b.

[0042] Specifically, the control unit 41 specifies, from among the multiple light sources 101b, the light source 101b whose emitted light is blocked by the light blocking member 20, in other words, the light source 101b whose emitted light is blocked by the light blocking member 20, based on the amount of light detected by the detection unit 42. More specifically, the control unit 41 sequentially turns on each of the multiple light sources 101b, to specify, from among the multiple light sources 101b, the light source 101b whose emitted light is blocked by the light blocking member 20, based on the amount of light detected by the detection unit 42. Furthermore, the control unit 41 may further specify, from among the multiple light sources 101b, the light source 101b whose emitted light transmits through the light blocking member 20, based on the amount of light detected by the detection unit 42, by sequentially turning on each of the multiple light sources 101b.

[0043] Next, a method for identifying the light source 101b that is blocked by the light blocking member 20 will be described.

[0044] For example, when the detection unit 42 is disposed on the side of the light source 101b in the light shielding member 20 in the housing 10a, the detection unit 42 can detect the amount of light reflected by the light shielding member 20, so the control unit 41 may determine whether or not the amount of light detected by the detection unit 42 is equal to or greater than a predetermined value when a first light source, which is one of the light sources 101b, is turned on. If the amount of light emitted by the first light source is equal to or greater than the predetermined value, it is considered that the light emitted by the first light source is reflected by the light shielding member 20 and the light is not transmitted enough to irradiate the irradiation surface. For this reason, the control unit 41 may specify that the first light source is the light source 101b whose emitted light is not transmitted through the light shielding member 20 if the amount of light detected by the detection unit 42 is equal to or greater than the predetermined value.

[0045] On the other hand, the control unit 41 may determine whether or not the amount of light detected by the detection unit 42 is equal to or greater than a predetermined value when a second light source different from the first light source is turned on. If the amount of light emitted by the second light source is less than the predetermined value, it is considered that the light emitted by the second light source has passed through the light blocking member 20. In this case, the control unit 41 may identify the second light source as light source 101b whose emitted light has passed through the light blocking member 20 if the amount of light detected by the detection unit 42 is less than the predetermined value.

[0046] Furthermore, when the detection unit 42 is disposed on the opposite side of the light shielding member 20 from the multiple light sources 101b side in the housing 10a, the detection unit 42 can detect the amount of light transmitted through the light shielding member 20, so the control unit 41 may determine whether the amount of light detected by the detection unit 42 is less than a predetermined value when the first light source is turned on. If the amount of light emitted by the first light source is less than the predetermined value, it is considered that the light emitted by the first light source is reflected by the light shielding member 20 and sufficient light is not transmitted to irradiate the irradiation surface. In this case, the control unit 41 may specify that the first light source is a light source 101b whose emitted light is not transmitted through the light shielding member 20 if the amount of light detected by the detection unit 42 is less than the predetermined value.

[0047] On the other hand, the control unit 41 may determine whether or not the amount of light detected by the detection unit 42 is less than a predetermined value when the second light source is turned on. If the amount of light emitted by the second light source is equal to or greater than the predetermined value, it is considered that the light emitted by the second light source has transmitted through the light blocking member 20. In this case, the control unit 41 may identify the second light source as light source 101b whose emitted light has transmitted through the light blocking member 20 if the amount of light detected by the detection unit 42 is equal to or greater than the predetermined value.

[0048] In addition, when a detection unit 42 (referred to as a first detection unit) is arranged on the light shielding member 20 on the side of the light sources 101b, and a detection unit 42 (referred to as a second detection unit) is arranged on the side of the light shielding member 20 opposite to the side of the light sources 101b, the first detection unit can detect the amount of light reflected by the light shielding member 20, and the second detection unit can detect the amount of light transmitted through the light shielding member 20. For this reason, when the first light source is turned on, the control unit 41 may determine whether the amount of light detected by the first detection unit is equal to or greater than a predetermined value, and determine whether the amount of light detected by the second detection unit is less than the predetermined value. With regard to the amount of light emitted by the first light source, the control unit 41 may determine that the amount of light detected by the first detection unit is equal to or greater than a predetermined value, and determine that the amount of light detected by the second detection unit is less than the predetermined value. In this case, it is considered that the light emitted by the first light source is reflected by the light shielding member 20, and that the light is not transmitted enough to irradiate the irradiation surface. Therefore, the control unit 41 may identify the first light source as the light source 101b, the emitted light of which has not been transmitted through the light blocking member 20.

[0049] On the other hand, when the second light source is turned on, the control unit 41 may determine whether the amount of light detected by the first detection unit is equal to or greater than a predetermined value, and may also determine whether the amount of light detected by the second detection unit is less than a predetermined value. With respect to the amount of light emitted by the second light source, the control unit 41 may determine that the amount of light detected by the first detection unit is less than a predetermined value, and may determine that the amount of light detected by the second detection unit is equal to or greater than a predetermined value. In this case, the light emitted by the second light source is considered to have passed through the light shielding member 20. In this case, the control unit 41 may identify the second light source as light source 101b whose emitted light has passed through the light shielding member 20.

[0050] As described above, when the control unit 41 identifies the light source 101b whose emitted light is blocked by the light blocking member 20, the control unit 41 cuts off the current supply to the identified light source 101b. In other words, when the control unit 41 identifies the light source 101b whose emitted light has passed through the light blocking member 20, the control unit 41 supplies current to the identified light source 101b.

[0051] Furthermore, when the control unit 41 identifies the light source 101b whose emitted light is blocked by the light blocking member 20, the control unit 41 stores the light source ID of the identified light source 101b, the coordinates of the light source 101b, and the determination result as to whether or not the light source 101b is a light-opaque light source, in the storage unit 43. The storage unit 43 stores a data table indicating the light source ID, the coordinates of the light source 101b, and the determination result as to whether or not the light source 101b is a light-opaque light source.

[0052] Next, with reference to FIGS. 4 and 5, a description will be given of how the control unit 41 sequentially turns on each of the multiple light sources 101b, and a data table that identifies the light sources 101b whose emitted light is blocked by the light blocking member 20.

[0053] FIG. 4 is a diagram showing the light sources 101b that are turned on according to the pattern and the light sources 101b that are not turned on. FIG. 4 shows a case where the light sources 101b arranged in a matrix are overlapped with the light shielding member 20. The broken lines show the holes 23 of the light shielding member 20. In FIG. 4, the light sources 101b that are turned on are shown by hatching with dots, and the light sources 101b whose emitted light is shielded by the light shielding member 20 are shown by white. In FIG. 4, the horizontal axis coordinate is indicated by x1... and the vertical axis coordinate is indicated by y1.... FIG. 5 is a schematic diagram showing the light source IDs, the coordinates of the light sources 101b, and the determination results.

[0054] 4 and 5, when the control unit 41 turns on the light source 101b with the light source ID "000000a1" located at the coordinates (x1, y1), the light is blocked by the light blocking member 20. Therefore, the control unit 41 specifies the light source 101b with the light source ID "000000a1" as the light source 101b whose light emitted is blocked by the light blocking member 20. The control unit 41 links the light source ID, the coordinates, and the determination result that the light source 101b is "corresponding" to the light source 101b that does not transmit light, and causes the storage unit 43 to store a data table in which these are linked.

[0055] The control unit 41 also identifies the light source 101b located at the coordinates (x1, y2) and having the light source ID "000000a2", the light source 101b located at the coordinates (x1, y3) and having the light source ID "000000a3", the light source 101b located at the coordinates (x1, y4) and having the light source ID "000000a4", and the light source 101b located at the coordinates (x1, y5) and having the light source ID "000000a5", as the light source 101b whose emitted light is blocked by the light blocking member 20. The control unit 41 links the light source ID, the coordinates, and the determination result that the light source 101b "corresponds" to the light source 101b through which light is not transmitted, and causes the storage unit 43 to store a data table in which these are linked.

[0056] Next, when the control unit 41 turns on the light source 101b with the light source ID "000000a6" located at the coordinates (x1, y6), the light passes through the light blocking member 20. Therefore, the control unit 41 identifies the light source 101b with the light source ID "000000a6" as the light source 101b whose emitted light passes through the light blocking member 20. The control unit 41 links the light source ID, the coordinates, and the determination result of "not applicable" to the light source 101b through which light does not pass, and causes the storage unit 43 to store a data table in which these are linked.

[0057] In this manner, the control unit 41 sequentially turns on each of the plurality of light sources 101b, thereby identifying the light source 101b whose emitted light is blocked by the light blocking member 20.

[0058] <Action and effect> The effects of lighting device 1 according to the present embodiment will be described.

[0059] The lighting fixture 1 according to technique 1 of the present embodiment includes a plurality of light sources 101b, a control unit 41 that controls the lighting of each of the plurality of light sources 101b, a light blocking member 20 that blocks light emitted by some of the plurality of light sources 101b, and a detection unit 42 that detects at least one of the amount of light reflected by the light blocking member 20 and the amount of light transmitted through the light blocking member 20, based on the amount of light detected by the detection unit 42. The control unit 41 identifies a light source 101b from among the plurality of light sources 101b whose emitted light is blocked by the light blocking member 20, and cuts off the supply of current to the identified light source 101b.

[0060] This allows control unit 41 to identify, from among the multiple light sources 101b, light source 101b that emits light that is blocked by light blocking member 20, based on the amount of light detected by detection unit 42. This allows control unit 41 to cut off the current supply to the identified light source 101b. This allows light source 101b that emits light that is blocked by light blocking member 20 to be turned off, thereby suppressing an increase in power consumption of lighting device 1 in this embodiment compared to the case where all of the multiple light sources 101b are turned on.

[0061] Therefore, a lighting fixture 1 capable of achieving further energy savings is provided. In particular, in this embodiment, it is expected that the greater the number of light sources 101b, the greater the energy savings will be.

[0062] The lighting fixture 1 according to the second aspect of the present embodiment is the lighting fixture 1 described in the first aspect. In this case, the control unit 41 sequentially turns on each of the multiple light sources 101b.

[0063] According to this, the plurality of light sources 101b can be turned on one by one in a predetermined sequence, so that the light source 101b to be shielded by the light shielding member 20 can be specified.

[0064] The lighting fixture 1 according to Technology 3 of the present embodiment is the lighting fixture 1 described in Technology 1 or Technology 2. In this case, the control unit 41 further identifies, from among the multiple light sources 101b, a light source 101b whose emitted light is transmitted through the light blocking member 20, based on the amount of light detected by the detection unit 42.

[0065] According to this, even if the detection unit 42 is arranged on either the side of the multiple light sources 101b of the light-shielding member 20 or the side opposite to the side of the multiple light sources 101b of the light-shielding member 20, it is possible to easily identify which light source 101b is lit or not.

[0066] The lighting fixture 1 according to technology 4 of the present embodiment is the lighting fixture 1 according to any one of technologies 1 to 3. In this case, the detection unit 42 is installed on at least one of the light source 101b side of the light blocking member 20 and the side of the light blocking member 20 opposite to the light source 101b side.

[0067] According to this, the detection unit 42 can be disposed on the side of the light shielding member 20 opposite to the side of the multiple light sources 101b so as to detect light transmitted through the light shielding member 20. Also, the detection unit 42 can be disposed on the side of the light shielding member 20 facing the multiple light sources 101b so as to detect light reflected by the light shielding member 20. This makes it possible to prevent the degree of freedom in the arrangement of the detection unit 42 from decreasing.

[0068] The lighting fixture 1 according to the fifth aspect of the present embodiment is the lighting fixture 1 according to any one of the first to fourth aspects. The detector 42 is disposed at least on the light blocking member 20 on the side of the plurality of light sources 101b.

[0069] According to this, the detection unit 42 can be disposed on the light shielding member 20 on the side of the plurality of light sources 101b so as to detect light reflected by the light shielding member 20. This makes it possible to prevent the degree of freedom in the arrangement of the detection unit 42 from decreasing.

[0070] The lighting device 1 according to Technique 6 of this embodiment is the lighting device 1 described in Technique 5. The surface of the light blocking member 20 is subjected to a diffusion treatment.

[0071] According to this, since the light irradiated to the light blocking member 20 is diffused, the detection unit 42 can easily detect the diffused light regardless of the arrangement. Therefore, it is possible to prevent the degree of freedom in the arrangement of the detection unit 42 from decreasing.

[0072] In particular, in the case of a configuration in which the detection unit 42 cannot be disposed at a position facing the light blocking member 20, even if the detection unit 42 is disposed on the inner peripheral side surface of the housing 10a as in this embodiment, the detection unit 42 can detect the light irradiated to the light blocking member 20. Therefore, regardless of how the detection unit 42 is disposed, the light source 101b that emits light that is blocked by the light blocking member 20 can be identified.

[0073] The lighting device 1 according to technology 7 of the present embodiment is the lighting device 1 according to any one of technologies 1 to 6. The lighting device 1 includes a housing 10a that houses the light blocking member 20 and the detector 42. The light blocking member 20 is detachable from the housing 10a.

[0074] According to this, the light blocking member 20 can be easily removed and attached, so that the light blocking member 20 can be easily replaced.

[0075] Furthermore, since the user can use a desired light blocking member 20, the user can freely set the shadow (pattern) of the light irradiated onto the irradiation surface.

[0076] The lighting device 1 according to the eighth aspect of the present embodiment is the lighting device 1 according to any one of the first to seventh aspects. The light sources 101b are arranged in a matrix.

[0077] For example, when multiple light sources 101b are arranged randomly, even if a light source 101b whose emitted light is blocked by the light blocking member 20 is identified and the identified light source 101b is turned off, unevenness may occur in the pattern of light irradiated onto the irradiation surface.

[0078] However, according to the present embodiment, since the multiple light sources 101b are arranged in a matrix, even if a specific light source 101b is turned off, it is possible to suppress unevenness in the pattern of light irradiated onto the irradiation surface. As a result, in the present embodiment, the pattern of light irradiated onto the irradiation surface is less likely to give a sense of incongruity to people.

[0079] The lighting device 1 according to the present embodiment is the lighting device 1 according to any one of the techniques 1 to 8. The light blocking member 20 is one or more gobo filters having one or more holes 23 formed therein.

[0080] According to this, since the gobo filter is more durable and less prone to deterioration than, for example, a slide film, the gobo filter can be used for a long period of time.

[0081] (Other variations) Although the lighting fixture according to the present disclosure has been described based on the above embodiment, the present disclosure is not limited to the embodiment. As long as the modification does not deviate from the spirit of the present disclosure, modifications that a person skilled in the art may make to the embodiment may also be included in the scope of the present disclosure.

[0082] For example, in the lighting fixture according to the above embodiment, the light blocking member may be replaced through a slit formed in the housing. Also, by providing a plurality of light blocking members on a pallet of a pallet rotating device, the pallet rotating device may rotate the pallet to change the light blocking member. In this case, the pallet may be detachable from the slit formed in the housing.

[0083] Furthermore, the lighting fixture according to the above embodiment may have an actuator capable of swinging the light blocking member. In this case, the actuator may be capable of moving the light blocking member with 1 / f fluctuation. This allows the projected image to reproduce the fluctuation of light and shadow with 1 / f fluctuation. The actuator may be a mechanism such as a motor and gears, or may be a fan that blows air against one or more light blocking members. In this case, the control unit may control the movement of the actuator. That is, the control unit may control the actuator to adjust the timing at which a force for moving the light blocking member is applied to the light blocking member, the strength of the force applied to the light blocking member, the change over time of the force applied to the light blocking member, and the like.

[0084] In the lighting device according to the above embodiment, the detection unit may be disposed outside the housing, i.e., the detection unit may be disposed anywhere as long as the detection unit can detect at least one of the amount of light reflected by the light blocking member and the amount of light transmitted through the light blocking member.

[0085] Furthermore, the control unit and the like included in the lighting fixture according to the above embodiment are typically realized as an LSI (Large Scale Integration) integrated circuit. These may be implemented as individual chips, or may be implemented as a single chip that includes some or all of them.

[0086] The integrated circuit is not limited to an LSI, but may be realized by a dedicated circuit or a general-purpose processor. A field programmable gate array (FPGA) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connections and settings of the circuit cells inside the LSI may also be used.

[0087] In the above embodiment, each component may be realized by a dedicated hardware or by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program stored in a storage medium such as a hard disk or a semiconductor memory.

[0088] In addition, the present disclosure also includes forms obtained by applying various modifications to the above-described embodiments that a person skilled in the art may conceive, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope that does not deviate from the spirit of the present disclosure. [Explanation of symbols]

[0089] 1 Lighting equipment 10a Housing 20 Light blocking material 23 Hole 41 Control section 42 Detection unit 101b Light source

Claims

1. A plurality of light sources; A control unit that controls the lighting of each of the plurality of light sources; a light blocking member that blocks light emitted by some of the light sources among the plurality of light sources; a detection unit that detects at least one of an amount of light reflected by the light blocking member and an amount of light transmitted through the light blocking member, The control unit identifies a light source from among the plurality of light sources, the light emitted from which is blocked by the light blocking member, based on the amount of light detected by the detection unit, and cuts off current supply to the identified light source. Lighting fixtures.

2. The control unit sequentially turns on each of the plurality of light sources.

2. The lighting device of claim 1.

3. The control unit further identifies, from among the plurality of light sources, a light source from which emitted light passes through the light blocking member, based on the amount of light detected by the detection unit.

3. A lighting device according to claim 2.

4. The detection unit is installed on at least one of the light source side of the light blocking member and the side of the light blocking member opposite to the light source side. A lighting device according to any one of claims 1 to 3.

5. The detection unit is installed at least on the light blocking member on the side of the plurality of light sources. A lighting device according to any one of claims 1 to 3.

6. The surface of the light blocking member is subjected to a diffusion treatment.

6. A lighting device according to claim 5.

7. a housing that houses the light blocking member and the detection unit, The light blocking member is detachable from the housing. A lighting device according to any one of claims 1 to 3.

8. The plurality of light sources are arranged in a matrix. A lighting device according to any one of claims 1 to 3.

9. The light blocking member is one or more gobo filters having one or more holes formed therein. A lighting device according to any one of claims 1 to 3.

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