JP2009076397A - Indirect lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constitute an indirect lighting system capable of conducting indirect lighting by illuminating a prescribed region with light, projecting a display image such as a message on the prescribed region or its vicinity, and calling attention to the projected display image. <P>SOLUTION: The indirect lighting system 1 consists of an indirect lighting part 3 conducting indirect lighting by illuminating the prescribed region with light; an image projecting part 4 projecting a display image on the prescribed region 6 or its vicinity; and a casing 2 housing the indirect lighting part 3 and the image projecting part 4. The indirect lighting part 3 varies illuminating light in conjunction with the projection of the display image 7 by the image projection part 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an indirect illumination device that performs indirect illumination by irradiating a specific area such as a wall of a building, and in particular, indirect illumination having a function of projecting a display image such as a message on the specific area or in the vicinity thereof. Relates to the device.

  Indirect lighting that illuminates the surroundings with scattered light scattered from the area irradiated with the illumination light by irradiating the illumination light to the corridors and indoor walls, floors or ceilings of restaurants, hotels, public facilities or private houses. The device has been put into practical use. In addition to the practical purpose of brightening the surrounding environment of the area irradiated with illumination light, this indirect lighting device is used to produce a production effect that creates a certain atmosphere in the space of the illuminated area. Has been. This indirect lighting device is composed of a light source and an optical system for irradiating light from the light source in a predetermined direction. The indirect lighting device is attached to a wall, ceiling, or floor, and illuminates a certain area of the wall, ceiling, or floor. It is configured to be able to. For this reason, this type of indirect lighting device is used to brighten the surroundings and produce a certain atmosphere, but is not used as an information transmission means.

  On the other hand, there are cases where it is desired to view weather forecasts, stock price information, or exchange rate fluctuations in real time. Also, there are cases where it is desired to quickly transmit emergency information to a large number of people at a hotel, restaurant or public facility. In such a case, even if the personal computer is turned on, the startup time is required or it is necessary to move to the place where the TV is installed, and information cannot be obtained in real time. There are many.

Therefore, it is convenient if the indirect illumination device and the image projection means are combined to produce the entire space and information can be transmitted quickly. Patent Document 1 describes a projector having an indirect illumination function. According to this projector, indirect illumination and image projection can be performed simultaneously. FIG. 5 is a schematic configuration diagram of the space effect lighting device 100 described in Patent Document 1. On the surface of the screen 103 on which an image is projected by the image generation device 101 and the projector 102, a large number of small holes 105 that pass and scatter light are formed. A diffuse reflection plate 104 is installed behind the screen 103 in which the large number of small holes 105 are formed. When an image is projected onto the screen 103 by the projector 102, a part of the projection light is irradiated to the back diffuse reflection plate 104 through the small hole 105 of the screen 103, and the light diffusely reflected from the diffuse reflection plate 104 is indirectly reflected. It is used as lighting.
JP 2007-25355 A

  However, the projector of Patent Document 1 requires a screen surface for displaying a projected image when performing indirect illumination. If this is applied to a wall or ceiling of a building, a screen surface must be provided on the wall or ceiling surface, which is inconvenient. In addition, because some of the light in the projected display image is used as indirect illumination, the indirect illumination color and amount of light are affected by the projected image, resulting in a certain stage effect that is one purpose of indirect illumination. Can't get.

  Further, when the projector is used as a lighting means for space production, there is a problem that the use efficiency of the illumination light is low and a sufficient space effect cannot be obtained. In addition, in the case of Patent Document 1, the area of the small holes formed in the screen is several percent or less with respect to the entire area, and the amount of light that can be used for space production is further reduced. In order to improve this, it is necessary to use a light source with high emission intensity, which increases power consumption, and accordingly increases the amount of heat generation, so it is not suitable for indirect lighting that is lit for a long time. There was a problem.

  In the invention which concerns on Claim 1, the indirect illumination part which irradiates illumination light to a specific area and performs indirect illumination, the image projection part which projects a display image to the specific area or the vicinity of the specific area, and the indirect illumination An indirect illumination device configured to include an image projection unit and a housing that houses the image projection unit, wherein the indirect illumination unit changes the illumination light in conjunction with projection of a display image by the image projection unit. An indirect lighting device was used.

  The invention according to claim 2 is characterized in that the indirect illumination unit changes a color temperature of the illumination light in conjunction with projection of a display image by the image projection unit. A lighting device was obtained.

  The invention according to claim 3 is characterized in that the indirect illumination unit changes the intensity of the illumination light in conjunction with projection of a display image by the image projection unit. It was set as the indirect lighting apparatus of description.

  In the invention which concerns on Claim 4, the said indirect illumination part changes the spectrum of the said illumination light in response to the projection of the display image by the said image projection part, The any one of Claims 1-3 characterized by the above-mentioned. It was set as the indirect lighting apparatus of 1 item | term.

  In the invention which concerns on Claim 5, the said specific area | region is a predetermined range of the floor of a building, a wall, or a ceiling, It is set as the indirect lighting apparatus of any one of Claims 1-4 characterized by the above-mentioned. .

  In the invention which concerns on Claim 6, it further has the receiving part which receives a message, The said indirect illumination part changes the said illumination light in response to projection of the display image which displays the said message by the said image projection part. It was set as the indirect lighting apparatus of any one of Claims 1-5 characterized by the above-mentioned.

  In the invention which concerns on Claim 7, the said indirect illumination part irradiates different illumination light according to the attribute of the said received message, It was set as the indirect illumination apparatus of Claim 6 characterized by the above-mentioned.

  According to invention of Claim 1, the indirect illumination part which irradiates illumination light to a specific area, and performs indirect illumination, the image projection part which projects a display image to the specific area or its vicinity, and the housing | casing which accommodates these The indirect illumination unit is configured to change the illumination light in conjunction with the projection of the display image by the image projection unit. As a result, indirect illumination is usually performed by the indirect illumination unit to exert a normal effect, and when the display image is projected by the image projection unit, the illumination light of the indirect illumination changes in conjunction with the projection of the display image. Therefore, there is an advantage that information can be quickly transmitted by drawing attention to the projected display image. Furthermore, since the illumination light of the indirect illumination unit does not use the light of the display image projected from the image projection unit, the effect of the indirect illumination is not greatly affected by the content of the display image to be projected and is consumed. It has the advantage that the power does not increase.

  According to the second, third, and fourth aspects of the invention, the indirect illumination unit changes the color temperature, intensity, or spectrum of the illumination light in conjunction with the projection of the display image by the image projection unit. Thereby, since the effect of the entire area where the indirect illumination is performed is changed, there is an advantage that it is possible to promptly and effectively alert the person under the environment.

  According to the invention of claim 5, the specific area is a predetermined area of the floor, wall or ceiling of the building. As a result, the environment of the space where people gather is produced by indirect lighting, and the display image is projected onto or near the area irradiated with the illumination light, so that a large number of people are alerted to the display image. It has the advantage that information can be transmitted quickly.

  According to the sixth aspect of the present invention, the receiver further receives a message, and the indirect illumination unit changes the illumination light in conjunction with the projection of the display image displaying the message. Accordingly, since the indirect illumination changes when the message is projected, there is an advantage that attention can be drawn to the projected message.

  According to invention of Claim 7, according to the attribute of the received message, an indirect illumination part irradiates different illumination light. Thereby, for example, there is an advantage that the brightness and color of the illumination light can be properly used depending on whether the displayed message is a general transmission matter or an emergency message for transmitting an emergency situation.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  Drawing 1 is an explanatory view showing the state where indirect lighting is performed on the wall of a building with indirect lighting device 1 concerning the embodiment of the present invention. FIG. 1A shows a state where indirect illumination is performed on a specific area 6 of the wall, and FIG. 1B shows a state where a display image 7 is displayed in the specific area 6.

  In FIG. 1A, the indirect illumination device 1 is composed of an indirect illumination unit 3, an image projection unit 4, and a housing 2 for housing them. The indirect illumination unit 3 of the indirect illumination device 1 irradiates the specific area 6 of the wall 5 of the building with illumination light and performs indirect illumination of the surrounding space of the specific area 6. Therefore, the specific area 6 of the wall 5 is projected brighter than the surrounding area. Indirect illumination is performed around the specific area 6 by scattered light scattered from the specific area 6.

  The indirect lighting device 1 is installed on a wall 5, a floor, a ceiling, or the like. When the indirect lighting device 1 is installed on the wall 5, the illumination light is irradiated on the wall surface of the wall 5 from an oblique direction. The indirect lighting device 1 may be installed on the floor or ceiling and the wall 5 may be irradiated with illumination light. Indirect illumination can also be performed by irradiating the ceiling or floor with illumination light. In addition, it is possible to perform indirect illumination by illuminating illumination light from behind each surface by setting the indirect illumination device 1 behind the wall surface and ceiling surface so that the wall surface and ceiling surface are semi-transmissive surfaces through which light is semi-transmissive. .

  In FIG. 1B, the image projection unit 4 of the indirect illumination device 1 projects a display image 7 in a specific area 6. A display image 7 is projected from the image projection unit 4 in the area of the specific area 6. The indirect illumination unit 3 increases the intensity of the illumination light in conjunction with the projection of the display image 7. A display image 7 projected from the image projection unit 4 represents a message. The indirect lighting device 1 includes a receiving unit (not shown), and receives a message related to an exchange rate when the exchange rate fluctuates more than a specific ratio, for example. When this message is received, the image projection unit 4 projects a display image for displaying this message. FIG. 1B shows that the exchange rate of the yen against the dollar has changed to 121.58 yen / dollar at 18:21. The intensity of the illumination light emitted from the indirect illumination unit 3 is increased, so that attention can be drawn to fluctuations in the exchange rate, and as a result, the displayed information can be quickly transmitted.

  When changing the illumination light of the indirect illumination unit 3, in addition to changing the light intensity of the illumination light, the color temperature of the illumination light may be changed, or the spectrum of the illumination light may be changed. May be. For example, when the color temperature of the illumination light is changed from 2000K (Kelvin) to 6000K, the color changes from red orange to white daylight. If the color temperature is increased to 10,000K or more, the color changes to blue. Similarly, when the spectrum of the illumination light is changed from 6000 to 5500, it changes from red to green. When the spectrum is changed to 4500 mm, it changes to blue-violet. Changing the color of the illumination light means changing the effect of indirect illumination. Further, the indirect illumination unit 3 may change the intensity, spectrum, or color temperature of the illumination light according to the attribute of the received message. For example, when the message is an emergency evacuation message, the indirect lighting unit 3 flashes the illumination light to call attention, and when the message is an important message, the intensity of the illumination light is increased. It can be distinguished and illuminated.

  FIG. 2 is a block diagram of the indirect lighting device 1 according to the embodiment of the present invention. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 2, the indirect illumination device 1 includes an indirect illumination unit 3 that performs illumination indirectly by irradiating a wall, a ceiling, or a floor, an image projection unit 4 that projects a display image such as a message, and the indirect illumination unit 3. Is comprised of a spectrum measuring unit 12 that measures the spectrum of scattered light scattered from a specific region illuminated by the light source or a region near it, a control unit 8 that controls the entire apparatus, and a housing 2 that houses them. The indirect illumination unit 3 includes an illumination lamp 10 and a reflector 9 for guiding light emitted from the illumination lamp 10 to a specific area. The image projection unit 4 includes a light modulation element 23 that converts an image signal into a display image, a light source 21, an illumination optical system 22 that guides light from the light source 21 to the light modulation element 23, and projection from the light modulation element 23. And an imaging optical system 24 for enlarging and projecting light. The image projection unit 4 inputs image data from the control unit 8 and projects a display image on the specific area 6 or in the vicinity thereof.

  As shown in FIG. 2, the indirect illumination device 1 includes an indirect illumination unit 3 and an image projection unit 4 that are integrally formed. The image projection unit 4 basically has a projector function. However, a function that enables projection of a full-color high-definition projection image that a normal projector has is not necessarily required. A simple message display or a fixed character or picture may be displayed in monochrome. Therefore, the weight and volume of the image projection unit 4 can be configured to be lightweight and compact, and the entire indirect lighting device 1 can be configured to be lightweight and compact. Therefore, it can be easily attached to the wall, ceiling, floor, etc. of the building.

  FIG. 3 is a functional block diagram of the indirect lighting device 1 according to the embodiment of the present invention. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 3, the indirect illumination device 1 includes an indirect illumination unit 3, an image projection unit 4, a spectrum measurement unit 12, and a control unit 8 that controls these units. The control unit 8 includes an illumination lamp control circuit 11 that controls light emission of the illumination lamp 10, a reception unit 13 that receives a message from the outside by wire or wirelessly, power on / off of the indirect illumination device 1, and other A control panel 14 for inputting an instruction or displaying the operating state of the indirect lighting device 1, a RAM or ROM (not shown), a control unit 15 for controlling the entire device, and a video signal input circuit 16 for inputting a video signal. And an image processing circuit 17 for inputting video data from the message received by the receiving unit 13 and the video signal input circuit 16 to convert it into image data for the light modulation element 23, and image data from the image processing circuit 17 A light modulation element drive circuit 18 for driving the light modulation element 23, a video storage memory 19 for storing image data displayed by the light modulation element 23, and a light source A light source control circuit 20 for controlling the first light-emitting, and a a bus 29 that connects these units. The image projection unit 4 has the configuration already described with reference to FIG.

  The illumination lamp 10 of the indirect illumination unit 3 can use a light source such as a halogen lamp, a mercury lamp, an incandescent lamp, a fluorescent lamp, or a light emitting diode. In the case of a light emitting diode, a plurality of light emitting diodes that emit red (R), green (G), and blue (B) colors can be used. The illumination lamp control circuit 11 can perform indirect illumination of the target color by emitting the illumination light of the target color by independently controlling the light emitting diodes of these colors. Similarly, a halogen lamp, a mercury lamp, an incandescent lamp, a fluorescent lamp, a light emitting diode, or the like can be used as the light source 21 of the image projection unit 4. If a plurality of light emitting diodes of each color of RGB are used, a display image of a target color can be projected as described above. Further, the illumination lamp 10 and the light source 21 can be configured with a plurality of fluorescent lamps having different emission colors to emit light of different colors.

  As the light modulation element 23, a transmissive liquid crystal display element can be used. In addition, a projection display device that scans laser light to form a projected image and a DMD (Digital Micromirror Device) that projects the reflected light from these micromirrors by controlling the tilt angles of a number of micromirrors are used. can do. Further, instead of these light modulation elements, a simple translucent plate in which a message such as letters is simply inserted is inserted between the illumination optical system 22 and the imaging optical system 24. Also good. Even when a liquid crystal display element or DMD is used, it is not always necessary to perform full-color display, and a simple light modulation element 23 that performs monochrome display can be used.

  The spectrum measuring unit 12 is composed of a light receiving element such as a photodiode. The spectrum measuring unit 12 detects the light intensity of each color through a plurality of RGB filters, for example, and detects the spectrum of scattered light scattered from the specific region 6. The control unit 15 controls and displays the light source control circuit 20 and the image processing circuit 17 of the image projection unit 4 in order to project the display image 7 having a spectrum different from the spectrum of the scattered light from the detected spectrum distribution. Set the color of image 7. For example, when the scattered light from the specific region 6 irradiated with the illumination light by the indirect illumination unit 3 is a warm color system having a peak at about 6000 mm, the spectrum of the display image projected from the image projection unit 4 is from a wavelength of 4500 mm. Set to a cold-colored system of 5000 mm area. When the light modulation element 23 enables color display, the control unit 15 designates the color of the display image displayed on the image processing circuit 17 as, for example, a cold color system. When the light modulation element 23 performs monochrome display, the control unit 15 controls the light source control circuit 20 to set the light emission color of the light source 21 to a cold color system. In this case, the light source 21 is composed of a plurality of RGB light emitting diodes, and the current supplied to the light emitting diodes of each color is controlled by the light source control circuit 20. Thereby, the visibility of the display image 7 by the image projection part 4 can be improved.

  Contrary to the above, the display color of the display image 7 projected by the image projection unit 4 is fixed, and the illumination light irradiated by the indirect illumination unit 3 is converted into the detection result detected by the spectrum measurement unit 12. You may make it change based on it. The scattered light scattered from the specific region 6 is added with light illuminated from the outside in addition to the illumination light of the illumination lamp 10 irradiated as indirect illumination. In such a case, since the spectrum of the scattered light is not determined only by the spectrum of the illumination light from the illumination lamp 10, the spectrum measurement unit irradiates the illumination light and then the spectrum measurement unit scatters the scattered light from the specific region 6. It is necessary to measure the spectrum. Based on the detection result, the emission spectrum of the illumination lamp 10 is changed. For example, when the display image 7 projected by the image projection unit 4 is a warm color system, the indirect illumination unit 3 emits illumination light to make the specific region 6 a cold color system, or vice versa, or a complementary color relationship. To be. In this case, the illumination lamp 10 may be constituted by light emitting diodes that emit RGB colors, and the illumination color may be controlled by the illumination lamp control circuit 11.

  In the above case, the case where the spectrum measurement unit 12 measures the scattered light from the specific region 6 in a state where the illumination lamp 10 of the indirect illumination unit 3 emits light and the specific region 6 is irradiated with illumination light will be described. However, instead of this, the spectrum measuring unit 12 detects the spectrum of the scattered light from the specific region 6 before irradiating the specific region 6 with the illumination light from the illumination lamp 10 of the indirect illumination unit 3, and It is possible to cause the lamp 10 to emit light appropriately. That is, the spectrum measuring unit 12 detects the scattered light in the specific region 6 before performing indirect illumination, and detects the intensity and spectral distribution of the scattered light in the region. The control unit 15 controls the illumination lamp control circuit 11 from the intensity of the scattered light in the specific region 6 detected by the spectrum measurement unit 12 and the spectrum distribution data, so that the appropriate intensity of the illumination light emitted from the illumination lamp 10 is obtained. Or, select an appropriate color temperature or emission color. For example, the illumination lamp control circuit 11 is controlled so as to increase the brightness of the specific region 6 by 10% to supply power to the illumination lamp 10. Further, the illumination lamp control circuit 11 is configured to detect the spectrum distribution of the scattered light scattered from the specific region 6 and cause the illumination lamp 10 to emit illumination light having a spectrum distribution having a complementary color relationship with the spectrum distribution. Control. If it does in this way, it can prevent that specific area 6 which performs indirect illumination becomes brightness and a color comparable as the circumference, and specific area 6 is buried in the circumference.

  The reception unit 13 receives a message from the transmission unit. The control unit 15 transmits message data regarding the message received by the reception unit 13 to the image processing circuit 17, and the light modulation element 23 displays the message and the message is projected onto the projection plane 25. In conjunction with the display of this message, the control unit 15 controls the illumination lamp control circuit 11 to change the illumination light of the illumination lamp 10.

  Moreover, the control part 15 can detect the attribute of the message which the receiving part 13 received, and can control the illumination lamp control circuit 11 to irradiate different illumination light from the illumination lamp 10 according to the attribute. . For example, the control unit 15 detects that the attribute of the received message is an emergency message and causes the illumination light of the lighting lamp 10 to blink, or detects that the attribute of the received message is an important message. The illumination lamp control circuit 11 is controlled so as to increase the intensity of illumination light of the illumination lamp 10. The message attribute may be detected by receiving attribute data added to the received message, and the control unit 15 may detect the attribute data and control the illumination lamp control circuit 11. 13 includes an emergency channel, an important channel, and a normal channel. When each channel is received, the control unit 15 may control the illumination lamp control circuit 11 correspondingly.

  Further, the display image projected from the image projection unit 4 is displayed by light that can be identified with respect to the illumination light emitted from the indirect illumination unit 3. When the spectrum of the display image projected from the image projection unit 4 and the spectrum of the illumination light emitted from the indirect illumination unit 3 are similar, at least the scattered light of the display image displaying a message or the like is scattered by indirect illumination. The display image is projected from the image projection unit 4 so as to be stronger than the light. Further, when the intensity of the scattered light by the indirect illumination and the intensity of the scattered light of the display image are approximate, for example, the illumination light having a color complementary to each other is used or the spectrum of the display image is selected.

  FIG. 4 is a flowchart showing an example of an operation flow of the indirect lighting device 1 according to the embodiment of the present invention. In addition, this flowchart figure represents the case where the received message distinguishes an emergency message, an important message, and a normal message, and the indirect illumination part 3 irradiates different illumination light in conjunction with these distinguished messages. .

  The control panel 14 of the indirect lighting device 1 is turned on and started. Then, the control unit 15 executes the main program and controls the illumination lamp control circuit 11 to turn on the illumination lamp 10 (step S1). The indirect illumination unit 3 irradiates the specific area 6 of the wall, ceiling, or floor with illumination light from the illumination lamp 10. The spectrum measuring unit 12 measures the spectrum of the scattered light field scattered from the specific region 6 (step S2). The control unit 15 compares the specified spectrum pattern stored in the RAM with the measured spectrum pattern measured by the spectrum measuring unit 12, and determines whether the measured spectrum pattern substantially matches the specified spectrum pattern (step S3). ).

  Here, the prescribed spectrum pattern refers to, for example, a spectrum pattern set in advance as a warm-colored spectrum pattern in which a red spectrum is emphasized or a cold-colored spectrum pattern in which a blue spectrum is emphasized. When the prescribed spectrum pattern of the scattered light scattered from the specific region 6 is a warm color pattern, the color of the display image projected from the image projection unit 4 is set to a cold color system. If the prescribed spectral pattern is a cold color system, the color of the display image is set to a warm color system. This is because the visibility of the display image can be improved. The setting of the prescribed spectral pattern is not limited to the cold color system or the warm color system, and an arbitrary color can be selected. In short, what is necessary is just to select so that the display image projected by the image projection part 4 with respect to the scattered light scattered from the specific area | region 6 can be visually recognized.

  When the control unit 15 determines that the measured spectrum pattern and the specified spectrum pattern substantially match (Yes in step S3), the process proceeds to step S5 where it is determined whether or not the end button is turned on. When the control unit 15 determines that the measured spectral pattern does not match the specified spectral pattern (No in step S3), the image processing unit 17 (hereinafter referred to as projector PJ) is controlled by controlling the image processing circuit 17 or the light source control circuit 20. The color of the display image 7 projected by the light modulation element 23 is changed from a preset color (step S4). For example, when the control unit 15 detects that the measurement spectrum pattern is a cold color instead of a preset warm color, the display color of the display image 7 is a warm color or a measurement spectrum. The display color is set by controlling the image processing circuit 17 or the light source control circuit 20 so that the color is complementary to the pattern. Thereafter, the process proceeds to step S5.

  When the control unit 15 determines that the end button is turned on (Yes in step S5), the process ends. The control unit 15 determines that the end button is not turned on (No in step S5), and detects whether the reception unit 13 has received a message (step S6). When the control unit 15 detects that the reception unit 13 has received a message from the outside (Yes in step S6), the control unit 15 controls the light source control circuit 20 to turn on the light source 21 of the projector PJ (step S8). The control unit 15 transmits the image data of the message received by the reception unit 13 to the image processing circuit 17, and the light modulation element 23 projects the display image of the message (step S9). When determining that the receiving unit 13 has not received the message (No in Step S6), the control unit 15 controls the light source control circuit 20 to turn off the light source 21 of the projector PJ (Step S7). In step S5, a message is waited for. Even in this case, the illumination lamp 10 is turned on, and the specific area 6 is irradiated with illumination light to perform indirect illumination.

  The control unit 15 determines whether or not the attribute of the received message is urgent (step S10). When the control unit 15 determines that it is not urgent (No in Step S10), it determines whether or not the attribute of the received message is important (Step S11). When the control unit 15 determines that it is not important (No in step S11), the process proceeds to step S5. In this case, the projector PJ projects the message until reception of the message ends (No in Step S6) or until the end button is pressed (Yes in Step S5).

  When the control unit 15 determines that the attribute of the received message is urgent (Yes in step S10), it controls the illumination lamp control circuit 11 to blink the illumination lamp 10 (step S13). The control unit 15 maintains the lighting lamp 10 blinking until a predetermined time has elapsed (No in step S14). When it is determined that the predetermined time has elapsed (Yes in Step S14), the control unit 15 controls the illumination lamp control circuit 11 to return the illumination lamp 10 to the normal illumination state (Step S15). Proceed to S5.

  When the control unit 15 determines that the attribute of the received message is important (Yes in step S11), the control unit 15 controls the illumination lamp control circuit 11 to improve the luminance of the illumination lamp 10 (step S12). Then, the illumination lamp 10 is maintained in a high luminance state until a predetermined time has elapsed (No in step S14).

  In step S7 and step S8 in the above operation flow, only the light source 21 of the image projection unit 4 is turned on or off. In addition to this, the video signal input circuit 16, the image processing circuit 17, the light modulation element drive circuit It is also possible to reduce the power consumption by turning on or off all the power supplied to the parts involved in the projection of the 18 display images. Moreover, in the said embodiment, although the indirect illumination apparatus 1 was equipped with the spectrum measurement part 12, and detected the spectrum of the scattered light scattered from the specific area | region 6, even if this spectrum measurement part 12 is removed, it is in this invention. Such an indirect lighting device 1 can be configured.

It is explanatory drawing explaining the indirect lighting apparatus which concerns on embodiment of this invention. It is a block diagram of the indirect lighting device concerning the embodiment of the present invention. It is a functional block diagram of the indirect lighting apparatus which concerns on embodiment of this invention. It is a flowchart figure showing the operation | movement flow of the indirect lighting apparatus which concerns on embodiment of this invention. It is a schematic block diagram of a conventionally well-known space effect illumination apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indirect illumination apparatus 2 Case 3 Indirect illumination part 4 Image projection part 5 Wall 6 Specific area 7 Display image 8 Control part 9 Reflector 10 Illumination lamp

Claims (7)

An indirect illumination unit that performs indirect illumination by irradiating illumination light to a specific region, an image projection unit that projects a display image on the specific region or in the vicinity of the specific region, and the indirect illumination unit and the image projection unit are stored. An indirect lighting device comprising a housing
The indirect illumination device is configured to change the illumination light in conjunction with projection of a display image by the image projection unit.   The indirect illumination device according to claim 1, wherein the indirect illumination unit changes a color temperature of the illumination light in conjunction with projection of a display image by the image projection unit.   The indirect illumination device according to claim 1, wherein the indirect illumination unit changes the intensity of the illumination light in conjunction with projection of a display image by the image projection unit.   The indirect illumination device according to claim 1, wherein the indirect illumination unit changes a spectrum of the illumination light in conjunction with projection of a display image by the image projection unit.   The indirect lighting device according to claim 1, wherein the specific region is a predetermined range of a floor, a wall, or a ceiling of a building. A receiver for receiving the message;
The indirect illumination unit according to claim 1, wherein the indirect illumination unit changes the illumination light in conjunction with projection of a display image for displaying the message by the image projection unit. Lighting device.   The indirect illumination device according to claim 6, wherein the indirect illumination unit irradiates different illumination light according to an attribute of the received message.

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