TW202105037A - Illumination system - Google Patents

Abstract

An illumination system (100) comprises: a projector (10) that projects, onto a projection surface, an image in which a subject is represented by shading in at least a partial region; and an illumination device (20) that irradiates illumination light onto the projection surface, the illuminance of the image on the projection surface being 0.3-55 times the illuminance of the illumination light.

Description

Lighting system

The present invention relates to a lighting system.

In the past, various lighting systems have been proposed. Patent Document 1 discloses a lighting system that can obtain a lighting environment in which users can comfortably perform visual tasks even if a light projection device is used to project images for performance. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2016-170972 A

[The problem to be solved by the invention]

The present invention provides a lighting system that can realize both the legibility of the image and ensuring the brightness in the space of the projected image. [Means to Solve the Problem]

An illumination system according to one aspect of the present invention includes: a projector, which displays an image of a projected object by a shadow in at least a part of the area, and projects it onto a projection surface; and an illumination device that illuminates the projection surface with illumination light; In the projection surface, the illuminance of the image is 0.3 times or more and 55 times or less of the illuminance of the illumination light. [Effects of the invention]

The lighting system of the present invention can realize both the visibility of the image and ensuring the brightness in the space of the projected image.

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. In addition, the implementation aspects described below all represent comprehensive or specific examples. The numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, steps, order of steps, etc. shown in the following embodiments are only examples, and the gist is not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claim are described as arbitrary constituent elements.

In addition, each figure is a schematic diagram, and it is not necessarily a rigorous one. In addition, in each figure, the same reference numerals are sometimes given to substantially the same configuration, and repeated descriptions are omitted or simplified.

(Implementation status) [Overview of lighting system] First, the structure of the lighting system according to the embodiment of the present invention will be explained. FIG. 1 is a diagram showing the outline of the lighting system according to the embodiment of the present invention. Fig. 2 is a block diagram showing the functional structure of the lighting system according to the embodiment of the present invention.

The lighting system 100 includes a projector 10, two lighting devices 20, a control device 30 and an illuminance sensor 40. The lighting system 100 only needs to include at least one lighting device 20.

The lighting system 100 is a system that can perform the projection of the image performed by the projector 10 and the illumination of the illuminating light performed by the lighting device 20 in parallel in the space 50 where the projector 10 and the lighting device 20 are provided. The space 50 is, for example, a closed space such as a room.

The image projected by the projector 10 is, for example, a monochrome image imitating the shade of a tree (in other words, a monochrome image of sunlight falling in the forest). Such images are used for space exhibitions, for example.

Generally speaking, in the case of projecting images for exhibition, in order to ensure the visibility (easy visibility) of the images, the space 50 must be darkened. That is, the brightness of the light emitted by the lighting device 20 must be dark. According to the research results of the inventor of this case, the illuminance on the projection surface of the image must be less than 50 lux, for example.

In contrast to this, the inventor of the present case discovered the established conditions regarding the illuminance described later. In the lighting system 100, in the case of projecting "like the above-mentioned monochrome image that imitates the shade of a tree, the image of the projected object is shown by shadow in at least one area", as long as this predetermined condition is met, even if the illumination is The illumination light emitted by the device 20 brightens the projection surface of the image, and can also ensure the legibility of the image. For example, the illuminance on the projection surface of the image may be allowed to be above 50 lux.

In other words, the lighting system 100 can realize both the visibility of the image and ensuring the brightness in the space of the projected image. In other words, the video show can be performed directly in the bright state of the space 50. According to the lighting system 100, the use range of images for performances can be expanded to spaces 50 that require brightness, such as offices or hospitals. Moreover, the lighting system 100 can also easily realize the performance of light with improved color rendering by irradiating the illuminating light with high color rendering to the projection surface of the image.

[Construction of lighting system] Hereinafter, each device included in such a lighting system 100 will be described. First, the projector 10 will be explained.

The projector 10 is installed on the ceiling or wall of the space 50. The projector 10 includes: a light source, and image elements such as a transmissive liquid crystal panel, a microlens array, or a reflective liquid crystal panel that modulate the light emitted by the light source; and project the image into the space 50 (wall, floor, or Ceiling, etc.). The projector 10 is a projection image with a lower contrast than a general image for performance. The image for such a performance is, for example, a monochrome image that imitates the shade of a tree (in other words, a grayscale image), but it may also be an image represented by "shades of a monochrome other than black", or a color image.

The contrast of the image used for the performance is, for example, 100:1 or less. In addition, the contrast means that when the darkest part (black) of the image is set to 1, the brightness of the brightest part (white) is a physical quantity that is several times that. The so-called contrast ratio of 100:1 or less means that when the darkest part of the image is set to 1, the brightest part is 100 or less. That is, the so-called contrast ratio of 100:1 or less means that the contrast ratio is 50:1 or the like.

The projector 10 is controlled based on the control signal transmitted from the control device 30, but it can also be controlled by the user operating a dedicated remote control or the like. Specifically, the image to be projected by the projector 10, the contrast of the image, the brightness of the image, the shape of the image (trapezoidal deformation), and the like can be changed.

Next, the lighting device 20 will be described. The illuminating device 20 is installed in the space 50 where the projector is installed, and irradiates light to the projection surface (the bottom surface of FIG. 1) of the image projected by the projector 10. The illuminating device 20 irradiates the illuminating light to the area overlapping the area where the image of the projection surface is projected. The lighting device 20 is, for example, a downlight buried in the ceiling or the wall of the space 50, but the specific aspect of the lighting device 20 is not particularly limited. The lighting device 20 may also be a ceiling lamp installed on the ceiling of the space 50, or a spotlight installed on the ceiling or a wall of the space 50.

The average color rendering index (Ra) of the lighting device 20 is, for example, 80 or more. That is, the lighting device 20 has high color rendering properties.

The light-emitting state of the lighting device 20 is controlled based on the control signal transmitted from the control device 30, but it can also be controlled by the user operating a dedicated remote control or the like. The control of the light-emitting state here includes, for example, switching control of lighting and extinguishing, dimming control (in other words, dimming rate (0%~100%) control), color adjustment control, and light distribution control.

The lighting device 20 includes, for example, a light emitting module, which has a plurality of LED (light emitting diode) elements mounted on a substrate. The plurality of LED elements include: a first LED element emitting white light with a lower color temperature (for example, incandescent lamp color, etc.), and a second LED element emitting white light with a higher color temperature (for example, natural white light, etc.). The light-emitting brightness of the first LED element and the second LED element are independently controlled. In this way, the dimming function and toning function of the lighting device 20 can be realized.

In addition, the specific aspect of the light-emitting module is not particularly limited. The light-emitting module may also be a light-emitting module having a plurality of LED elements mounted on a substrate, and the plurality of LED elements may each include a red LED chip, a blue LED chip, and A light-emitting module with green LED chips and the brightness of each LED chip can be independently controlled. In addition, the light-emitting module is not limited to the light-emitting module using LED elements, and it may also be a light-emitting module using semiconductor light-emitting elements such as semiconductor lasers, organic EL (Electro Luminescence), or solid-state light-emitting elements such as inorganic EL. group.

Moreover, unlike the projector 10, the illuminating device 20 does not have a function of projecting images. Specifically, the illuminating device 20 does not include the transmissive liquid crystal panel, the microlens array, or the reflective liquid crystal panel that the projector 10 is equipped with.

Next, the control device 30 will be described. The control device 30 controls the projector 10 and the lighting device 20. The control device 30 is a device provided separately from the projector 10 and the illuminating device 20, but it may also be integrated with one of the projector 10 and the illuminating device 20 and built into the one device. The control device 30 includes a communication unit 31, a control unit 32, a storage unit 33, and an operation acceptance unit 34.

The communication unit 31 is a communication circuit for allowing the control device 30 to communicate with the projector 10, the lighting device 20, and the illuminance sensor 40 via a local communication network. The communication performed by the communication unit 31 may be wired communication or wireless communication. The communication specification of the communication performed by the communication unit 31 is not particularly limited.

The control unit 32 controls the projector 10 and the lighting device 20 by causing the communication unit 31 to transmit control signals. The control unit 32 is realized by, for example, a microcomputer, but it may also be realized by a processor.

The storage unit 33 is a storage device that stores programs executed by the control unit 32. Specifically, the storage unit 33 is realized by a semiconductor memory or the like.

The operation accepting unit 34 is a user interface device that accepts the operation of the user. The operation accepting unit 34 is realized by a touch panel or a hardware button. In addition, the control device 30 does not necessarily have the operation accepting unit 34, and a mobile terminal with a dedicated application installed and capable of communicating with the communication unit 31 may be used as the operation accepting unit 34. The mobile terminal is specifically a smart phone or a tablet terminal.

Next, the illuminance sensor 40 will be described. The illuminance sensor 40 senses the illuminance of the projection surface (the ground in the example of FIG. 1) on which the image is projected by the projector 10. The illuminance sensor 40 is, for example, integrated with the lighting device 20 and built in the lighting device 20, but it may also be integrated with the projector 10 and built in the projector 10. In addition, the illuminance sensor 40 can also be installed separately from any of the projector 10 and the illuminating device 20, and located at a position different from any of the projector 10 and the illuminating device 20, for example, The illuminance sensor 40 is arranged on the projection surface, that is, the floor or wall material.

[Research results obtained by the inventor of this case] The inventor of the present case conducted an experiment on "the subjective evaluation of the environmental illuminance and the legibility of the image when the image of the sunlight falling in the forest is projected onto the projection surface." Fig. 3 is a diagram for explaining the outline of such a subjective evaluation experiment. Fig. 3(a) shows the environment in which the experiment was performed, and Fig. 3(b) shows the image used for evaluation.

As shown in Figure 3(a), in the experiment on subjective evaluation, the image (Figure 3(b)) was projected onto the projection surface (wall surface) from the projector 10 installed on the ceiling, and fifteen Subjectively evaluated whether the legibility of the image is acceptable or not. On the projection surface, not only the image is projected, but also the light irradiated from the illuminating device 20 installed on the table. By controlling the illuminating device 20, the illuminance (that is, the ambient illuminance) on the projection surface is changed, and the subject is Subjectively evaluate whether the legibility of the image is acceptable.

Specifically, the following subjective evaluation is performed three times for each subject: "From the state where the lighting device 20 is turned off (that is, the ambient illuminance is zero), when the brightness is gradually increased, is the visibility of the image acceptable? Subjective evaluation of "," and "Subjective evaluation of whether the visibility of the image is acceptable when the brightness is gradually reduced from the state of the maximum brightness of the lighting device 20".

Figure 4 is a diagram showing the experimental results of such subjective evaluation. In FIG. 4, the vertical axis indicates how many% of the evaluators rated the visibility of the image as acceptable, and the horizontal axis indicates the illuminance caused by the projection surface of the light emitted by the lighting device 20 (that is, the environmental Illumination). In addition, the illuminance of the image on the projection surface (that is, the illuminance of the image on the projection surface when the lighting device 20 is turned off) is 183 lux.

As shown in Figure 4, when the ambient light level is 202 lux, 75% of the subjects can accept the recognizable image, and when the ambient light level is 366 lux, 50% of the subjects can accept the recognizable image. Sex. When the ambient light level is 550 lux, 25% of the subjects can accept the legibility of the image.

Fig. 5 is a diagram showing a table after integrating the experimental results of subjective evaluation. As shown in Figure 5, on the projection surface, if the illuminance of the image is more than 0.3 times the illuminance of the illuminating light (the brightness of the image is 183 lux/the ambient illuminance is 550 lux), more than 25% of the subjects can accept The legibility of the image. On the projection surface, if the illuminance of the image is more than 0.5 times the illuminance of the illumination light (the brightness of the image is 183 lux/the ambient illuminance is 366 lux) times, more preferably, more than 50% of the subjects can accept the ease of the image. Discriminative.

Furthermore, on the projection surface, if the illuminance of the image is 0.9 times the illuminance of the illumination light (the brightness of the image is 183 lux/the ambient illuminance is 202 lux), more than 75% of the subjects can accept the ease of the image. Discriminative. In addition, the illuminance is in other words the amount of light beam per unit area.

In addition, on the projection surface, when the illuminance of the image is sufficiently higher than the illuminance of the illumination light, the visibility of the image is good. Considering that the maximum illuminance of the image that can be projected by the existing projector 10 is about 10,000 lux, the illuminance of the image on the projection surface is 55 times the illuminance of the illumination light (the brightness of the image is 10,000 lux/the ambient illuminance is 202 Lux) below. In addition, if the illuminance of the image on the projection surface is less than one time the illuminance of the illumination light, the illuminance of the image will be lower than that of the illumination light. Generally speaking, this structure is not adopted.

It is generally believed that the reason for obtaining such a result is that users can make cognitive supplements based on the original experience in daily natural phenomena. Therefore, compared with the general video performance in the past, its acceptance will increase (in other words, acceptable Unacceptable ambient light in general video performances).

In addition, although the content of this projection surface is set as the sun falling in the forest, even if it is based on the shadow display of any natural phenomenon such as water surface, ripples, etc., the above effects can be obtained in the same way. The user can freely choose to project from the projector 10 Content.

At the same time, the control of "change the above content, change the playback speed, change the color tone, or change the brightness, etc." can also be performed according to the time. The control can be carried out by the user's operation or can be carried out automatically. At this time, it is desirable to improve the design and comfort of the space.

Based on the above experiment of the inventor of the present invention, in the lighting system 100, when the lighting system 100 is installed (during construction), the illuminance of the image and the setting of the illuminating light are set, so that the illuminance of the image on the projection surface is At least 0.3 times or more than 55 times the illuminance of the illuminating light (hereinafter, the conditions for this illuminance are also described as established conditions). In this way, the lighting system 100 can illuminate the space 50 while ensuring the visibility of the image in the space 50.

Moreover, in the lighting system 100, even if the illuminance of the illumination light on the projection surface is above 50 lux, which is generally difficult to see the image clearly, the projector 10 and the illuminating device 20 can be controlled to illuminate the image. The illuminance of light is more than 0.3 times and less than 55 times to ensure the legibility of the image.

[Operation example 1] For example, the lighting system 100 selectively executes "normal mode operation" and "show mode operation". The normal mode of operation allows the user to freely change the "brightness of the image projected by the projector 10" without restriction. , And "Brightness of the illuminating light emitted by the illuminating device 20". In the operation of the performance mode, the projector 10 and the lighting device 20 are controlled by setting the illuminance of the image on the projection surface to be 0.3 times or more and 55 times or less of the illuminance of the illuminating light. Hereinafter, the operation for storing (registering) the user's such setting as the setting information in advance will be described. FIG. 6 is a flowchart of operation example 1 of the lighting system 100.

First, the operation accepting unit 34 of the control device 30 accepts an operation for projecting the illumination light onto the projection surface by the illumination device 20 from the user (S11). The control unit 32 causes the lighting device 20 (in more detail, each of the two lighting devices) to irradiate illumination light based on the operation accepted by the operation accepting unit 34 (S12). Specifically, the control unit 32 causes the communication unit 31 to transmit the control signal to the lighting device 20 so that the lighting device 20 irradiates the lighting light. As a result, the projection surface will be illuminated with illumination light of the illuminance desired by the user.

The illuminance sensor 40 senses the illuminance of the illuminating light irradiated to the projection surface (S13), and transmits the first illuminance information representing the illuminance of the illuminating light irradiated to the projection surface to the control device 30 as a result of the sensing.的通信部31。 31. The control section 32 stores the first illuminance information received by the communication section 31 in the storage section 33 (S14), and based on the received first illuminance information, calculates the illuminance on the projection surface of the image projected by the projector 10 The allowable range (S15). As described above, the allowable range of the illuminance of the image is at least 0.3 times and no more than 55 times the illuminance indicated by the first illuminance information.

In this embodiment, the lighting system 100 keeps the illuminance of the image in the first illuminance information position in response to "changes in the illuminance of the space environment caused by changes in the arrangement of lighting fixtures or spaces, time or weather." The indicated illuminance is not less than 0.3 times and not more than 55 times, so it is ideal.

Next, the operation accepting unit 34 accepts from the user an operation for projecting an image on the projection surface by connecting the projector 10 (S16). The control unit 32 causes the projector 10 to project an image based on the operation accepted by the operation accepting unit 34 (S17). Specifically, the control unit 32 causes the communication unit 31 to transmit a control signal to the projector 10 so that the projector 10 projects an image. As a result, an image of the illuminance desired by the user will be projected on the projection surface.

The illuminance sensor 40 senses the illuminance of the projection surface (that is, the illuminance obtained by adding the illuminance of the image and the illuminance of the illumination light) (S18), and uses the second illuminance information representing the illuminance of the projection surface as the sensor The result of this is transmitted to the communication unit 31 of the control device 30. The control unit 32 stores the second illuminance information received by the communication unit 31 in the storage unit 33 (S19).

After that, when the user's setting completion operation is accepted by the operation accepting section 34 (S20), the control section 32 will subtract the step S19 from the illuminance indicated by the second illuminance information stored in the storage section 33 in step S19. The illuminance indicated by the first illuminance information stored in the storage unit 33 in S14 is used to calculate the illuminance of the image on the projection surface (S21). In addition, the control unit 32 determines whether the illuminance of the image on the projection surface is within the allowable range calculated in step S15 (S22).

If the control unit 32 determines that the illuminance of the image on the projection surface is within the allowable range calculated in step S15 (YES in S22), it will store the setting information indicating the current settings of the projector 10 and the lighting device 20 in Storage section 33 (S23). That is, the storage unit 33 stores the setting information of the projector 10 and the illuminating device 20 when the illuminance of the image on the projection surface becomes 0.3 times or more and 55 times or less of the illuminance of the illuminating light. Hereinafter, when the operation accepting unit 34 accepts an operation of a user who instructs the performance mode, the control unit 32 controls the projector 10 and the lighting device 20 based on the setting information stored in the storage unit 33.

On the other hand, if the control unit 32 determines that the illuminance of the image on the projection surface is outside the allowable range calculated in step S15 (NO in S22), the setting information will not be stored in the storage unit 33. In this case, "notify the user if the setting is outside the allowable range" and "reset by the user, etc." will be performed.

According to such operation example 1, the lighting system 100 can selectively store the setting information such that the illuminance of the image on the projection surface becomes 0.3 times or more and 55 times or less of the illuminance of the illuminating light in the storage unit 33.

Furthermore, in Operation Example 1, after determining the illuminance of the illumination light, it is determined whether the illuminance of the image is within the allowable range, but after determining the illuminance of the image, it is also possible to determine whether the illuminance of the illumination light is within the allowable range.

Moreover, in Operation Example 1, the illuminance sensor 40 measures the illuminance of the projection surface, but it is not necessary to use the illuminance sensor 40 to measure the illuminance of the projection surface. For example, the user can also manually measure the illuminance of the projection surface of the projector 10 and the illuminating device 20 when only the illuminating device 20 is emitting light with an illuminance meter. In this case, the user can store the first illuminance information in the storage portion 33 by inputting the manually measured illuminance to the operation accepting portion 34. The control unit 32 calculates the allowable range of the illuminance of the image projected by the projector 10 on the projection surface based on the stored first illuminance information. As described above, the allowable range of the illuminance of the image is at least 0.3 times and no more than 55 times the illuminance indicated by the first illuminance information.

In this embodiment, for users who are not familiar with video equipment such as projectors, such as builders who specialize in the construction of lighting devices, it is possible to set the output conditions of the projector 10 separately. , It is ideal for simple initial setting of the system.

[Operation example 2] Sometimes during the operation of the above-mentioned presentation mode (that is, when the predetermined condition that the illuminance of the image on the projection surface is 0.3 times or more and 55 times or less of the illuminance of the illumination light is satisfied), the setting of the projector 10 may be changed. Hereinafter, the operation of the lighting system 100 at this time will be described. FIG. 7 is a flowchart of operation example 2 of the lighting system 100.

The lighting system 100 operates in the exhibition mode (S31). At this time, it meets the established condition that the illuminance of the image on the projection surface is 0.3 times or more and 55 times or less of the illuminance of the illumination light.

Next, the operation accepting unit 34 accepts an operation for changing the illuminance of the image projected by the projector 10 from the user (S32). The control unit 32 determines whether the predetermined condition can be satisfied when the illuminance of the image projected by the projector 10 is changed based on this operation (S33). For example, as described in operation example 1 above, based on the illuminance information transmitted by the illuminance sensor 40, the illuminance of the image in the performance mode and the illuminance of the illumination light are stored in the storage unit 33, then the control unit 32 can estimate the illumination of the changed image, and can judge whether the predicted illumination of the changed image meets the established conditions.

If the control unit 32 determines that the predetermined condition can be satisfied after the illuminance of the image projected by the projector 10 is changed based on the above operation (Yes in S33), the illuminance of the image projected by the projector 10 is changed (S34) . That is, the control unit 32 controls the projector 10 in accordance with the user's instruction. At this time, the lighting device 20 is not specifically controlled.

On the other hand, if the control unit 32 determines that the predetermined condition cannot be satisfied after the illuminance of the image projected by the projector 10 is changed based on the above operation (No in S33), it will change the projector 10 based on the above operation. The illuminance of the projected image (S35), and the illuminance of the illumination light irradiated by the illuminating device 20 is further changed to satisfy the predetermined condition (S36). That is, the control unit 32 controls the projector 10 according to the user's instruction, and controls the lighting device 20 to satisfy the predetermined conditions.

As explained above, the lighting system 100 can control the projector 10 according to the user's instructions when the predetermined conditions cannot be met because the projector 10 is controlled according to the user's instructions, while changing the illumination light irradiated by the lighting device 20 The illuminance to meet the established conditions. That is, the lighting system 100 ensures the visibility of the image by linking the projector 10 and the lighting device 20.

In addition, in the operation example 2, the case of instructing to change the illuminance of the image projected by the projector 10 is explained, but the case of changing the illuminance of the illumination light irradiated by the illuminating device 20 is also the same. That is, if the control unit 32 controls one of the projector 10 and the lighting device 20 according to the user's instruction, and the predetermined condition cannot be satisfied, it controls the one device according to the user's instruction and controls the projector. The other of 10 and the lighting device 20 can satisfy the predetermined conditions.

Furthermore, it is not necessary to perform the linkage control as in the operation example 2, and the lighting system 100 may also be operated in the performance mode to invalidate the operation of the user who cannot satisfy the predetermined condition.

[Effects etc.] As described above, the lighting system 100 includes: the projector 10, which displays the image of the projected object by shadow in at least a part of the area, and projects it onto the projection surface; and the lighting device 20 irradiates the illuminating light to the projection surface; On the projection surface, the illuminance of the image is 0.3 times to 55 times the illuminance of the illumination light.

Such an illumination system 100 can ensure the visibility of the image even if the projection surface is brightened by the illumination light. Thus, the lighting system 100 can achieve both the visibility of the image and the ensuring of the brightness in the space where the image is projected.

Also, for example, the illuminance of the illumination light on the projection surface is 50 lux or more.

Such an illumination system 100 can ensure the visibility of the image even if the illuminance of the illumination light in the projection surface is above 50 lux, which is generally difficult to clearly see the image.

In addition, for example, the lighting system 100 further includes a control device 30 that controls the projector 10 and the lighting device 20. The control device 30 includes a storage unit 33 that stores the setting information of the projector 10 and the illuminating device 20 when the illuminance of the image on the projection surface becomes 0.3 times or more and 55 times or less of the illuminance of the illuminating light; and the control portion 32, based on the settings Information to control the projector 10 and the lighting device 20.

Such a lighting system 100 can control the projector 10 and the lighting device 20 based on the setting information.

Also, for example, because one of the projector 10 and the lighting device 20 is controlled according to the user's instruction, it is impossible to satisfy the condition that the illuminance of the image on the projection surface is 0.3 times to 55 times the illuminance of the illuminating light. In this case, the control unit 32 controls one device according to the user's instruction, and controls the other of the projector 10 and the lighting device 20 to satisfy the conditions.

In such a lighting system 100, even when the user instructs the setting to be changed, the projector 10 and the lighting device 20 can be linked and controlled to ensure the legibility of the image.

Also, for example, the contrast of the image is 100:1 or less.

In this way, the lighting system 100 can project images with a contrast ratio of 100:1 or less.

Also, for example, the average color rendering index of the lighting device 20 is 80 or more.

Such lighting system 100 can illuminate lighting light with high color rendering properties. By irradiating the illumination light with high color rendering properties to the projection surface of the image supplementarily, the performance of light with improved color rendering properties can be realized.

Also, for example, the image is a monochrome image.

In this way, the lighting system 100 can project a monochromatic image.

(Other implementation aspects) Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

For example, in the above embodiments, the lighting system is used for performances, but it can also be used for purposes other than performances.

In addition, in the above embodiment, the lighting system is realized by a plurality of devices, but it can also be realized as a single device. In the case where the lighting system is realized by a plurality of devices, the constituent elements included in the lighting system described in the above embodiment can also be distributed to the plurality of devices in any manner.

In addition, in the above-mentioned embodiment, another processing unit can also be used to execute the processing performed by the specific processing unit. In addition, the order of plural processing may be changed, and plural processing may be executed in parallel.

Moreover, in the above-mentioned implementation aspect, each constituent element can also be realized by executing a software program suitable for each constituent element. Each constituent element can also be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

In addition, each constituent element can also be realized by hardware. Each constituent element may also be a circuit (or an integrated circuit). These circuits can also be used as a whole to form one circuit, or they can be separate circuits. In addition, these circuits may be general-purpose circuits or dedicated circuits.

In addition, the general or specific aspects of the present invention can also be implemented by recording media such as systems, devices, methods, integrated circuits, computer programs, or computer-readable CD-ROMs. Moreover, it can also be realized by any combination of systems, devices, methods, integrated circuits, computer programs, and recording media.

For example, the present invention can also be implemented as a control device of the above-mentioned embodiment, or as a control method of a lighting device executed by a computer such as a control device. The present invention can also be implemented as a program for making a computer execute the control method of the lighting device, and can also be implemented as a computer-readable non-transitory recording medium on which such a program is recorded.

In addition, for each embodiment, various modifications that those skilled in the art can think of are implemented for each embodiment, or without departing from the scope of the present invention, by arbitrarily combining the constitutions of each embodiment The implementation of the elements and functions is also included in the present invention.

10: Projector 20: Lighting device 30: control device 31: Ministry of Communications 32: Control Department 33: Storage Department 34: Operation Acceptance Department 40: Illumination sensor 50: space 100: lighting system S11~S23, S31~S36: steps

FIG. 1 is a diagram showing the outline of the lighting system according to the embodiment of the present invention. Fig. 2 is a block diagram showing the functional structure of the lighting system according to the embodiment of the present invention. Figure 3 (a) and (b) are diagrams used to illustrate the outline of the subjective evaluation experiment. Figure 4 is a diagram showing a graph of the experimental results of subjective evaluation. Figure 5 is a diagram showing a table that integrates the experimental results of subjective evaluation. Fig. 6 is a flowchart of operation example 1 of the lighting system according to the embodiment of the present invention. FIG. 7 is a flowchart of operation example 2 of the lighting system according to the embodiment of the present invention.

10: Projector

20: Lighting device

30: control device

40: Illumination sensor

50: space

100: lighting system

Claims (7)

A lighting system including: The projector will show the image of the projected object by shadow in at least a part of the area, and project it onto the projection surface; and The illuminating device irradiates the illuminating light to the projection surface; On the projection surface, the illuminance of the image is 0.3 times to 55 times the illuminance of the illumination light. The lighting system according to claim 1, wherein: The illuminance of the illumination light on the projection surface is above 50 lux. The lighting system as described in claim 1, further including: A control device, which controls the projector and the lighting device; The control device includes: The storage unit stores the setting information of the projector and the lighting device when the illuminance of the image on the projection surface becomes 0.3 times to 55 times the illuminance of the illuminating light; and The control unit controls the projector and the lighting device based on the setting information. The lighting system according to claim 3, wherein: Because one of the projector and the lighting device is controlled according to the user's instruction, it is impossible to satisfy that the illuminance of the image in the projection surface is 0.3 times or more and 55 times or less of the illuminance of the illuminating light. Under conditions, the control unit controls one of the devices according to the instructions of the user, and controls the other of the projector and the lighting device to satisfy the condition. The lighting system according to claim 1, wherein: The contrast of the image is below 100:1. The lighting system according to claim 1, wherein: The average color rendering index of the lighting device is above 80. The lighting system according to any one of claims 1 to 6, wherein: The image is a monochrome image.

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