JP7422162B2 - Lighting devices and lighting methods - Google Patents

Description

The present invention relates to an illumination device and an illumination method for illuminating an evaluation surface with light of appropriate intensity.

As described in US Pat. No. 8,592,748, a method is known for simulating a high quality daylight spectrum at a predefined color temperature ranging from 2700K to 10000K for the purpose of illuminating matching surfaces. ing. Lighting is said to have the greatest impact on visual matching, and inaccurate lighting leads to inaccurate evaluations, which inevitably leads to complaints and increased costs in the production process.

In this method, (a) a plurality of LEDs arranged in groups are used to generate light; Each group consists of LEDs arranged in a compact row, with the LEDs within each group emitting light at different wavelengths. For this purpose, a particular spectrum of light is determined by (b) measuring the spectrum of light emitted by individual LEDs at different predetermined operating temperatures, and (c) calculating the tristimulus values XYZ ( CIE1931 2 degrees). (d) store the calculated tristimulus values in memory and assign operating temperature and PWM values as color characteristics for each LED; (e) operate the LEDs at the operating temperature and PWM values selected from the memory contents and simulate (f) During a given cycle frequency, a dual LED chip constantly and repeatedly measures each individual operating temperature and compares it with the tristimulus values stored in memory for the operating temperature; (g ) if the current measurement result and the stored value match: continue to operate the LED in question at the previous value of the operating temperature; (h) if the current working temperature deviates from the stored value: return to the current working temperature Determine the appropriate PMW value from the associated tristimulus value and/or the memory content allocated to this LED.

US Patent No. 8,592,748

As mentioned above, when you want to evaluate the color tone and workmanship of printed matter or products placed on the evaluation surface using light with a specific intensity in each wavelength band (standard light source, standard light source), it is possible to achieve even higher accuracy. There is a need for lighting devices and lighting methods that can perform accurate evaluations.

An object of the present invention is to provide an illumination device and an illumination method that enable highly accurate evaluation.

The above-mentioned problem is solved by the following present invention. That is, the lighting device of the present invention (1) includes an evaluation surface provided indoors;
a controlled light source capable of emitting first evaluation light and second evaluation light onto the evaluation surface;
a sensor unit capable of sensing the intensity of environmental light and the intensity of the first evaluation light on the evaluation surface;
Based on the intensity of the light sensed by the sensor section, an intensity is calculated by subtracting the intensity of the environmental light from the intensity of the first evaluation light, and the second evaluation light having this intensity is sent from the control light source to the control light source. A control unit that injects onto the evaluation surface,
Equipped with.

Further, the lighting device according to the present invention (2) is the lighting device according to (1), wherein the sensor section is a spectrophotometer,
The control unit includes a plurality of intensity data corresponding to each wavelength band of light obtained by adding the environmental light obtained by the sensor unit and the first evaluation light, and the first evaluation light stored in advance. a plurality of intensity data corresponding to each wavelength band of the ambient light, and a plurality of intensity data corresponding to each wavelength band of the first evaluation light based on the plurality of intensity data corresponding to each wavelength band of the first evaluation light. It has a function to set a plurality of intensity data corresponding to each wavelength band of the second evaluation light by subtracting a plurality of intensity data corresponding to each wavelength band of the second evaluation light from the above-mentioned ambient light.

Further, the lighting device according to the present invention (3) is the lighting device according to (1), wherein the sensor section is an illuminance meter,
The control unit includes:
Calculating the illuminance of the environmental light by subtracting an integral value obtained by integrating a plurality of intensity data corresponding to each wavelength band of the first evaluation light from the illuminance obtained by the sensor unit,
generating a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the illuminance of the environmental light;
Each wavelength of the second evaluation light is obtained by subtracting the plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light. It has a function to set multiple intensity data corresponding to a band.

Further, the lighting device according to the present invention (4) is the lighting device according to (1), wherein the sensor section is a spectrophotometer,
The control unit selects a plurality of intensity data corresponding to each wavelength band of the environmental light obtained by the sensor unit from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. The subtracted values are set as a plurality of intensity data corresponding to each wavelength band of the second evaluation light.

Further, the lighting device according to the present invention (5) is the lighting device according to (1), wherein the sensor section is an illuminance meter,
The control unit includes:
Generating a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the illuminance obtained by the sensor unit,
Each wavelength of the second evaluation light is obtained by subtracting the plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light. Set as multiple intensity data corresponding to the band.

Further, the lighting device according to the present invention (6) is the lighting device according to (3) or (5), in which the control unit generates a plurality of intensity data corresponding to each wavelength band of the environmental light for each light source type. multiple memorizations,
The control unit allows a user to select the light source type of the environmental light.

Further, the lighting device according to the present invention (7) is the lighting device according to any one of (1) to (6), in which the sensor section is removable from the evaluation surface.

Further, the lighting device of the present invention (8) is the lighting device according to any one of (1) to (6), wherein the sensor section is provided in the control light source,
The control section uses the intensity of the light sensed by the sensor section based on the reflectance on the evaluation surface.

Further, the lighting device according to the present invention (9) is the lighting device according to any one of (1) to (6), in which at least a part of the evaluation surface has translucency,
The sensor section is provided on a line connecting the control light source and the evaluation surface, and at a position farther than the evaluation surface when viewed from the control light source.

Further, the illumination method of the present invention (10) includes emitting first evaluation light from a controlled light source to an evaluation surface irradiated with environmental light;
sensing the intensity of the environmental light and the intensity of the first evaluation light on the evaluation surface by a sensor unit;
Calculating the intensity of the environmental light from the combined intensity of the environmental light and the first evaluation light sensed by the sensor unit,
Second evaluation light having an intensity obtained by subtracting the intensity of the environmental light from the intensity of the first evaluation light is emitted from the control light source onto the evaluation surface.

Further, the illumination method according to the present invention (11) is the illumination method according to (10), wherein the sensor section is a spectrophotometer,
A plurality of intensity data corresponding to each wavelength band of light obtained by adding the environmental light and the first evaluation light obtained by the sensor unit, and each wavelength band of the first evaluation light stored in advance. calculating a plurality of intensity data corresponding to each wavelength band of the ambient light based on the plurality of corresponding intensity data;
A plurality of intensity data corresponding to each wavelength band of the second evaluation light is obtained by subtracting a plurality of intensity data corresponding to each wavelength band of the environmental light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light. Set as strength data.

Further, the lighting method according to the present invention (12) is the lighting method according to (10), wherein the sensor section is an illuminance meter,
Calculating the illuminance of the environmental light by subtracting an integral value obtained by integrating a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance from the illuminance obtained by the sensor unit,
generating a plurality of simulated intensity data corresponding to the wavelength band of the environmental light from the illuminance of the environmental light;
Each wavelength band of the second evaluation light is obtained by subtracting the plurality of simulated intensity data corresponding to the wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light. Set as multiple intensity data corresponding to.

Further, the illumination method of the present invention (13) detects the intensity of environmental light on the evaluation surface by a sensor section,
Second evaluation light having an intensity obtained by subtracting the intensity of the environmental light from the intensity of the first evaluation light is emitted from the control light source onto the evaluation surface.

Further, the illumination method according to the present invention (14) is the illumination method according to (13), wherein the sensor section is a spectrophotometer,
Each wavelength of the second evaluation light is obtained by subtracting a plurality of intensity data corresponding to each wavelength band of the environmental light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. Set as multiple intensity data corresponding to the band.

Further, the lighting method according to the present invention (15) is the lighting method according to (13), wherein the sensor section is an illuminance meter,
Generating a plurality of simulated intensity data corresponding to the wavelength band of the environmental light from the illuminance obtained by the sensor unit,
The second evaluation is performed by subtracting the plurality of simulated intensity data corresponding to each wavelength band of the ambient light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. Set as multiple intensity data corresponding to each wavelength band of light.

Furthermore, the illumination method of the present invention (16) provides a plurality of intensity data corresponding to each wavelength band of the environmental light stored in advance from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. A second evaluation light having an intensity obtained by subtracting the second evaluation light is emitted from the control light source onto the evaluation surface.

The illumination method according to the present invention (17) is the illumination method according to (16), wherein the plurality of intensity data corresponding to each wavelength band of the environmental light stored in advance is set under an environmental condition selected by the user. and the type of light source.

According to the present invention, it is possible to provide an illumination device and an illumination method that enable highly accurate evaluation in terms of evaluation.

FIG. 1 is a schematic diagram showing a lighting device according to a first embodiment. FIG. 2 is a block diagram showing details of a control circuit of the lighting device shown in FIG. 1. FIG. 2 is a schematic side view showing details of a control light source of the lighting device shown in FIG. 1. FIG. 2 is a flowchart showing a lighting method using the lighting device shown in FIG. 1. FIG. 5 is a graph showing the relationship between the first evaluation light (D50), the second evaluation light, and the environment light used in the illumination method shown in FIG. 4. FIG. It is a flowchart which shows the illumination method using the illumination device of 2nd Embodiment. It is a graph showing a spectrum of light including a plurality of intensity data corresponding to each wavelength band of general LED lighting. It is a graph showing a spectrum of light including a plurality of intensity data corresponding to each wavelength band of a general fluorescent lamp. It is a graph showing a spectrum of light including a plurality of intensity data corresponding to each wavelength band of a general incandescent light bulb. It is a flowchart which shows the illumination method using the illumination device of 3rd Embodiment. It is a flowchart which shows the illumination method using the illumination device of 4th Embodiment. It is a schematic diagram showing the lighting device of a 5th embodiment. It is a schematic diagram showing the lighting device of a 6th embodiment. It is a graph which shows the relationship between the 1st evaluation light (D65), the 2nd evaluation light, and environment light used for the illumination method using the illumination device of 7th Embodiment.

Embodiments of the lighting device and lighting method of the present invention will be described below with reference to FIGS. 1 to 14. The illumination device and illumination method of the present invention enable evaluation of an evaluation object using light having characteristics closer to standard light (D65 standard light source, D50 auxiliary standard light source).
[First embodiment]

The lighting device and lighting method of the first embodiment will be described with reference to FIGS. 1 to 5. As shown in FIGS. 1 and 2, the illumination device 11 includes an evaluation surface 13 on which an evaluation object 12 is placed, a control light source 14 that emits light to the evaluation surface 13, and light from the control light source 14 and environmental light. The control circuit 16 includes a sensor section 15 that can sense the light, and a control circuit 16 that controls the control light source 14 based on a signal from the sensor section 15. The control circuit 16 may be configured by a general PC and its peripheral devices. The control circuit 16 is an example of a control section. The lighting device 11 may have a touch panel display connected to the control circuit 16. The lighting device 11 may be installed in a part of a printing stand for checking the finished state of printed matter.

The evaluation surface 13 constitutes a flat plane. An evaluation object 12 is placed above the evaluation surface 13 . In this embodiment, the evaluation target object 12 is a printed matter (color printed matter) printed on paper or other media. The evaluation surface 13 may be provided, for example, on the top surface of the book stand. As an example, the evaluation surface 13 is provided along a plane (horizontal plane) parallel to the top surface of the book stand, but it may extend diagonally to the horizontal plane or may extend in the vertical direction. .

The control light source 14 is preferably supported by a frame (not shown) attached to the review stand, and is preferably placed at a position spaced apart from the evaluation surface 13 by a predetermined distance. That is, the control light source 14 is placed at a position facing the evaluation surface 13. As shown in FIG. 3, the control light source 14 includes a plurality of light emitting elements 17 and a light diffusing section 18 that diffuses and transmits light from the plurality of light emitting elements 17. Each of the plurality of light emitting elements 17 is preferably configured with an LED, for example, but may be configured with other light sources such as a laser diode, an organic EL, etc. other than the LED.

Each of the plurality of light emitting elements 17 includes a light source section 21 capable of emitting excitation light, and a fluorescent layer 22 containing a plurality of particulate phosphors that convert the excitation light into light in a specific wavelength band corresponding to each color. , may have. The light source section 21 may be able to emit near-ultraviolet light, for example, but may also be able to emit visible light, particularly blue light, for example. The phosphor layer 22 includes a phosphor A that converts excitation light into light of a certain color (first wavelength band), a phosphor B that converts excitation light into light of another color (second wavelength band), may be included in a mixture. The fluorescent layer 22 may contain a mixture of three or more types of fluorescent substances so as to convert excitation light into light of three or more colors.

Alternatively, each of the plurality of light emitting elements 17 may be configured to be able to directly emit light in a specific wavelength band corresponding to each different color.

The light diffusing section 18 is formed as a flat plate having translucency. The light diffusion section 18 is made of resin or glass. The light diffusing section 18 has a diffusing surface with a rough surface on one side. The diffusion surface is preferably formed by, for example, a method such as sandblasting.

The control light source 14 can emit D50 (auxiliary standard light source) light (for example, 2000 lx) as the first evaluation light under the control of the control circuit 16. The control light source 14 can, under the control of the control circuit 16, emit second evaluation light that is corrected light that is corrected from the first evaluation light.

The illuminance (maintained illuminance) of indoor lighting (environmental light) is, for example, 500 lx in a factory, 750 lx in a work space such as an office, and 200 lx in a warehouse. Ordinary ambient light has an illuminance that cannot be ignored in strict evaluation.

In this embodiment, the sensor section 15 (sensor) is provided on the evaluation surface 13. The sensor section 15 may be embedded on the evaluation surface 13 as a part of the evaluation surface 13. Alternatively, the sensor section 15 may be provided at the outer edge of the evaluation surface 13, thereby preventing the evaluation object 12 from interfering with the sensor section 15 when the evaluation object 12 is placed on the evaluation surface 13. It may be possible to prevent this from happening. Alternatively, the sensor unit 15 may be configured to be detachable from the evaluation surface 13, and is installed on the evaluation surface 13 only during the calibration process, and is evaluated at the completion of the calibration process for correcting (calibrating) the second evaluation light. It may be removed from surface 13. The timing of performing the calibration process is arbitrary, and may be about once a day or about once a month. The sensor section 15 is connected to the control circuit 16 by wire or wirelessly, electrically or via electromagnetic waves, and signals can be exchanged between the sensor section 15 and the control circuit 16. The sensor unit 15 may be optically connected to the control circuit 16 by wire or wirelessly. That is, the sensor section 15 may be optically connected to the control circuit 16 via an optical fiber, an electrical/optical converter, etc., and optical signals may be exchanged between the sensor section 15 and the control circuit 16. Alternatively, the sensor section 15 may be optically connected to the control circuit 16 by optical wireless communication, and an optical signal can be transmitted between the communication device connected to the sensor section 15 and the communication device connected to the control circuit 16. You can exchange it.

In this embodiment, the sensor section 15 is configured with a spectrophotometer. The sensor section 15 configured with a spectrophotometer can sense the intensity of light for each wavelength band. Therefore, the control circuit 16 can obtain a light spectrum including the light intensity for each wavelength band on the evaluation surface 13 based on the signal from the sensor unit 15 constituted by a spectrophotometer.

As shown in FIG. 2, the control circuit 16 includes a microprocessor (MPU 23), a timing generation circuit 24 for PWM control, a plurality of drivers 25 connected to the timing generation circuit 24, a storage section 26, and the MPU 23. It has a bus 27 that connects with the storage section 26. The driver 25 is a circuit that is connected to the light emitting element 17 and directly drives the light emitting element 17. The storage unit 26 may be a hard disk drive (HDD) or an SSD (Solid State Drive). The storage unit 26 stores a plurality of intensity data corresponding to each wavelength band of the first evaluation light (for example, D50).

In this embodiment, the timing generation circuit 24 performs PWM control to control the amount of light emitted from each light emitting element of the controlled light source. When the light emitting element 17 of the control light source 14 is composed of a light source other than an LED, such as a laser diode or an organic EL, the control circuit 16 can perform current value control or voltage value control instead of the timing generation circuit 24. It may be configured with a circuit that can perform the following steps.

A lighting method using the lighting device 11 of this embodiment will be described with reference to FIGS. 4 and 5.

When the user turns on the power of the lighting device 11, the lighting device 11 starts. Immediately, the illumination device 11 drives the control light source 14 to emit first evaluation light, which is light corresponding to D50 (auxiliary standard light source), onto the evaluation surface 13 (step S11). Note that the evaluation surface 13 is irradiated with not only the first evaluation light but also environmental light that is light from the indoor lighting 19.

The sensor unit 15 composed of a spectrophotometer senses the intensity of the light that is the sum of the environmental light and the first evaluation light as a plurality of intensity data corresponding to each wavelength band (illuminance for each wavelength band). (Step S12). The sensor section 15 sends signals corresponding to a plurality of intensity data corresponding to each wavelength band to the control circuit 16.

The control circuit 16 stores a plurality of intensity data corresponding to each wavelength band of light obtained by adding these environmental lights and the first evaluation light, and each wavelength of the first evaluation light stored in the storage unit 26 of the control circuit 16. A plurality of intensity data corresponding to the band are compared. More specifically, the control circuit 16 compares these, and determines whether a plurality of intensity data corresponding to each wavelength band of light that is the sum of the environmental light and the first evaluation light is stored in advance. The portion exceeding the plurality of parameters corresponding to each wavelength band is treated as a plurality of intensity data corresponding to each wavelength band derived from the environmental light. Therefore, the control circuit 16 subtracts the plurality of intensity data corresponding to each wavelength band of the first evaluation light from the plurality of intensity data corresponding to each wavelength band of the light that is the sum of the environmental light and the first evaluation light. By doing so, it is possible to obtain a plurality of intensity data corresponding to each wavelength band of the environmental light as shown in FIG. FIG. 5 shows the illuminance corresponding to each wavelength band on the evaluation surface 13, and the relative illuminance when the maximum value of the intensity data of the first evaluation light (when λ=550 nm) is set to 1.

The control circuit 16 subtracts the plurality of intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light, thereby obtaining the correction light of the second evaluation light. A plurality of intensity data corresponding to each wavelength band is calculated (calibration step, step S13). After completing this calibration process, the user may remove the sensor section 15. The control circuit 16 drives the control light source to irradiate the evaluation surface 13 with this second evaluation light as correction light (step S14). As a result, light having intensity data in each wavelength band corresponding to D50 as shown in FIG. 5 can be realized on the evaluation surface 13. Therefore, the user can evaluate the finish of the evaluation object 12 placed on the evaluation surface 13 with the light correctly adjusted to the intensity of D50.

According to the first embodiment, the following can be said. The lighting device 11 includes an evaluation surface 13 provided indoors, a control light source 14 capable of emitting onto the evaluation surface 13, and a sensor section 15 capable of sensing the intensity of the environmental light on the evaluation surface 13 and the intensity of the first evaluation light. Then, based on the intensity of the light sensed by the sensor unit 15, an intensity is calculated by subtracting the intensity of the environmental light from the intensity of the first evaluation light, and the second evaluation light having this intensity is transmitted to the control light source 14. and a control unit for injecting the liquid from the liquid to the evaluation surface 13.

In addition, the illumination method includes emitting first evaluation light from a control light source 14 to the evaluation surface 13 irradiated with environmental light, and detecting the intensity of the environmental light and the intensity of the first evaluation light on the evaluation surface 13. The intensity of the environmental light is calculated from the intensity of the light detected by the sensor unit 15, which is the sum of the environmental light and the first evaluation light, and the intensity of the environmental light is calculated from the intensity of the first evaluation light. Second evaluation light having an intensity obtained by subtracting the intensity of the ambient light is emitted from the control light source 14 onto the evaluation surface 13 .

According to the illumination device 11 and illumination method having these configurations, it is possible to correctly reproduce the first evaluation light (for example, D50, etc.) on the evaluation surface 13 while taking into consideration the intensity of the environmental light. Therefore, the finished state of the evaluation target object 12 can be evaluated based on the correct color tone, and highly accurate evaluation of the evaluation target object 12 can be realized.

In this case, the sensor unit 15 is a spectrophotometer, and the control unit controls a plurality of wavelength bands corresponding to each wavelength band of light obtained by adding the environmental light obtained by the sensor unit 15 and the first evaluation light. Based on the intensity data and a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance, a plurality of intensity data corresponding to each wavelength band of the environmental light is calculated, The result obtained by subtracting the plurality of intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light is the plurality of intensities corresponding to each wavelength band of the second evaluation light. It has a function to set as data.

According to this configuration, by using a spectrophotometer, it is possible to obtain light intensity data for each wavelength band (light illuminance for each wavelength band), so the intensity of environmental light can be measured for each wavelength band. can be understood correctly. With this, it is possible to correctly set a plurality of intensity data corresponding to each wavelength band of the second evaluation light, which is the correction light. Thereby, the second evaluation light and the environmental light are added together, and the first evaluation light can be correctly reproduced on the evaluation surface 13.

The sensor section 15 is attachable to and detachable from the evaluation surface 13. According to this configuration, the sensor unit 15 does not get in the way of work on the evaluation surface 13, and a user-friendly lighting device 11 can be realized.

In the following embodiments, parts that are different from the first embodiment will be mainly described, and illustrations or explanations of parts common to the first embodiment will be omitted.
[Second embodiment]

The lighting device 11 and lighting method of the second embodiment will be described with reference to FIGS. 6 to 9.

The storage unit 26 of the control circuit 16 stores a plurality of intensity data corresponding to each wavelength band for each type of environmental light source (eg, LED, fluorescent lamp, incandescent lamp). That is, the storage unit 26 of the control circuit 16 stores spectra for each type of light source. At this time, the plurality of intensity data for each light source type stored in the storage unit 26 may be relative values to the intensity of light in other wavelength bands, or may be actual values obtained by actually measuring the light reproduced by the actual device. There may be one or both.

The sensor section 15 is composed of an illuminance meter. Unlike a spectrophotometer, an illumination meter does not provide multiple intensity data of light corresponding to each wavelength band, but instead detects the illuminance at the evaluation surface 13, taking into account the intensity of light of all wavelengths. can do.

The lighting device 11 of this embodiment includes a touch panel display connected to a control circuit 16.

A lighting method using the lighting device 11 of this embodiment will be described with reference to FIGS. 6 to 9.

When the lighting device 11 is activated, the control circuit 16 displays on the touch panel display an image requesting the user to input the type of light source of the indoor lighting 19 (environmental light). The user checks the lighting 19 installed in the room and inputs the type of light source on the touch panel display (step S21). Examples of light source types include LEDs, fluorescent lamps, incandescent lamps, etc., but other light source types may also be selectable. Incidentally, spectra of general light sources including a plurality of intensity data for each wavelength band corresponding to the light source type are well known, and examples thereof are shown in FIGS. 7 to 9.

FIG. 7 shows the spectrum of a typical LED illumination, and shows the relative intensity when the intensity of the peak at 460 nm is set to 1. FIG. 8 shows the spectrum of a typical fluorescent lamp, and shows the relative intensity when the intensity of the peak at 550 nm is set to 1. FIG. 9 shows the spectrum of a typical incandescent light bulb, and shows the relative intensity when the intensity of the 780 nm peak is set to 1.

The storage unit 26 of the control circuit 16 stores a general light source spectrum (values on the mountain-shaped ridge lines shown in FIGS. 7 to 9) that includes a plurality of intensity data for each wavelength band corresponding to these light source types. ) is remembered. Note that the integral value obtained by integrating or adding each value of this spectrum (the value corresponding to the area of the mountain shape shown in FIGS. 7 to 9) approximately corresponds to the illuminance on the evaluation surface 13, or This value has an extremely high correlation with the illuminance on the surface 13. Therefore, if there is information regarding the illuminance on the evaluation surface 13 and information regarding the light source type, the control circuit 16 can simulate a plurality of intensity data corresponding to each wavelength band of the environmental light on the evaluation surface 13. Can be done.

A case will be described below using an example in which the user selects, for example, LED as the light source type. After the user selects the light source type, the control circuit 16 drives the control light source 14 to irradiate the evaluation surface 13 with the first evaluation light (step S22). The sensor unit 15 senses the illuminance on the evaluation surface 13 and sends a signal regarding the illuminance to the control circuit 16 (step S23). The control circuit 16 calculates an integral value by integrating a plurality of intensity data (corresponding to actual measurement values on the evaluation surface) corresponding to each wavelength band of the first evaluation light emitted in step S22. This integral value is a value that approximately corresponds to the illuminance of the first evaluation light on the evaluation surface 13, or has a very high correlation with the illuminance of the first evaluation light on the evaluation surface 13. The control circuit 16 calculates an integral value of a plurality of intensity data corresponding to each wavelength band of the first evaluation light (illuminance of the first evaluation light on the evaluation surface 13) from the illuminance value obtained by the sensor unit 15. By subtraction, the illuminance of the environmental light is calculated (step S24).

The control circuit 16 calculates a plurality of simulated intensity data corresponding to each wavelength band of the ambient light based on the illuminance of the ambient light and information regarding the light source type selected by the user (step S25). Further, the control circuit 16 subtracts a plurality of simulated intensity data corresponding to each wavelength band of the ambient light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light, and then subtracts a plurality of simulated intensity data corresponding to each wavelength band of the first evaluation light, A plurality of intensity data corresponding to each wavelength band of light is calculated (calibration step, step S26). After completing this calibration process, the user may remove the sensor section 15. The control circuit 16 irradiates the evaluation surface 13 with this second evaluation light as correction light (step S27). As a result, the first evaluation light (for example, D50) is reproduced on the evaluation surface 13. The user can correctly evaluate the finished state of the evaluation object on the evaluation surface 13. In this embodiment, the case where the user selects an LED as the light source type is described as an example, but the same applies even when the user selects a fluorescent lamp or an incandescent lamp as the light source type.

According to this embodiment, the following can be said. The sensor unit 15 is an illuminance meter, and the control unit subtracts an integral value obtained by integrating a plurality of intensity data corresponding to each wavelength band of the first evaluation light from the illuminance obtained by the sensor unit 15. Calculate the illuminance of the environmental light, generate a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the illuminance of the environmental light, and generate a plurality of simulated intensity data corresponding to each wavelength band of the first evaluation light. It has a function of subtracting the plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the intensity data and setting the resultant as a plurality of intensity data corresponding to each wavelength band of the second evaluation light. .

According to this configuration, correctly adjusted first evaluation light (for example, D50, etc.) can be reproduced on the evaluation plane while taking into consideration the intensity of the environmental light. Therefore, the finished state of the evaluation target object 12 can be evaluated based on the correct color tone, and highly accurate evaluation of the evaluation target object 12 can be realized. Furthermore, since the sensor section 15 is configured with an illuminance meter, the cost of the sensor section 15 can be reduced compared to a case where the sensor section 15 is configured with a spectrophotometer.

In this case, the control unit stores a plurality of intensity data corresponding to each wavelength band of the ambient light for each light source type, and the control unit has a function of allowing the user to select the light source type of the ambient light. have According to this configuration, even if a spectrophotometer is not used in the sensor unit 15, by receiving information about the light source type from the user, each wavelength of the environmental light is A plurality of simulated intensity data corresponding to the band can be calculated. Thereby, accurate second evaluation light can be emitted as correction light, and the first evaluation light (for example, D50) can be correctly reproduced together with the environmental light on the evaluation surface 13.
[Third embodiment]

With reference to FIG. 10, a lighting device 11 and a lighting method according to a third embodiment will be described.

The sensor section 15 is composed of a spectrophotometer as in the first embodiment. Furthermore, in the present embodiment, the control circuit 16 does not irradiate the evaluation surface 13 with the first evaluation light when obtaining a plurality of intensity data corresponding to each wavelength band of the environmental light.

A lighting method using the lighting device 11 of this embodiment will be described. When the user starts the lighting device 11, the control circuit 16 immediately acquires the intensity of the ambient light, that is, a plurality of intensity data corresponding to each wavelength band of the ambient light, via the sensor unit 15 (step S31). At this time, the evaluation surface 13 is not irradiated with any light from the control light source 14, and the evaluation surface 13 is irradiated with only environmental light (indoor lighting 19, etc.).

Furthermore, the control circuit 16 generates a plurality of intensity data corresponding to each wavelength band of the environmental light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light (for example, D50) stored in advance in the storage unit 26. is subtracted to calculate a plurality of intensity data corresponding to each wavelength band of the second evaluation light, which is the correction light (step S32). The control circuit 16 drives the control light source 14 to irradiate the evaluation surface 13 with the second evaluation light (step S33). As a result, the first evaluation light (for example, D50) is correctly reproduced on the evaluation surface 13. The user can correctly evaluate the finished state of the evaluation object 12 on the evaluation surface 13.

According to this embodiment, the following can be said. The lighting device 11 includes an evaluation surface 13 provided indoors, a control light source 14 capable of emitting onto the evaluation surface 13, and a sensor section 15 capable of sensing the intensity of the environmental light on the evaluation surface 13 and the intensity of the first evaluation light. Then, based on the intensity of the light sensed by the sensor unit 15, an intensity is calculated by subtracting the intensity of the environmental light from the intensity of the first evaluation light, and the second evaluation light having this intensity is transmitted to the control light source 14. and a control unit for injecting the liquid from the liquid to the evaluation surface 13.

According to this configuration, correctly adjusted first evaluation light (for example, D50, etc.) can be reproduced on the evaluation surface 13 while taking into consideration the intensity of the environmental light. Therefore, the finished state of the evaluation target object 12 can be evaluated based on the correct color tone, and highly accurate evaluation of the evaluation target object 12 can be realized. Furthermore, in this embodiment, the step of irradiating the evaluation surface 13 with the first evaluation light prior to the correction of the evaluation light is not required. Therefore, if the environmental light has sufficient intensity to be detected by the sensor unit 15, the step of first irradiating the evaluation surface 13 with the first evaluation light as in this embodiment can be omitted. , the process required for correction (calibration) of evaluation light can be simplified.

In this case, the sensor unit 15 is a spectrophotometer, and the control unit controls the intensity data obtained by the sensor unit 15 from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. It has a function of subtracting a plurality of intensity data corresponding to each wavelength band of the environmental light and setting the resultant as a plurality of intensity data corresponding to each wavelength band of the second evaluation light.
According to this configuration, the process required for correction (calibration) of the evaluation light can be simplified without requiring a step of irradiating the evaluation surface with the first evaluation light prior to correction of the evaluation light.

The sensor section 15 is attachable to and detachable from the evaluation surface 13. According to this configuration, the sensor unit 15 does not get in the way of work on the evaluation surface 13, and a user-friendly lighting device 11 can be realized.
[Fourth embodiment]

With reference to FIG. 11, a lighting device 11 and a lighting method according to a fourth embodiment will be described.

The storage unit 26 of the control circuit 16 stores a plurality of intensity data corresponding to each wavelength band for each type of light source (eg, LED, fluorescent lamp, incandescent lamp). That is, the storage unit 26 of the control circuit 16 stores spectra for each type of light source. At this time, the plurality of intensity data for each light source type stored in the storage unit 26 may be relative values to the intensity of light in other wavelength bands, or may be actual values obtained by actually measuring the light reproduced by the actual device. There may be one or both.

The sensor section 15 is composed of an illuminance meter. The lighting device 11 of this embodiment includes a touch panel display connected to a control circuit 16.

A lighting method using the lighting device 11 of this embodiment will be described with reference to FIG. 11.

When the lighting device 11 is activated, the control circuit 16 displays on the touch panel display an image requesting the user to input the type of light source of the indoor lighting 19 (environmental light). The user checks the lighting 19 installed in the room and inputs the type of light source on the touch panel display (step S41). Options for the light source type include, for example, an LED, a fluorescent lamp, an incandescent lamp, and the like.

The storage unit 26 of the control circuit 16 stores spectra (values on the mountain-shaped ridge lines in FIGS. 7 to 9) that correspond to these light source types and include a plurality of intensity data for each wavelength band. Note that the integral value obtained by integrating or adding each value of this spectrum (the value corresponding to the area of the mountain shape shown in FIGS. 7 to 9) approximately corresponds to the illuminance on the evaluation surface 13, or This value has an extremely high correlation with the illuminance on the surface 13. Therefore, if there is information on the illuminance of the ambient light on the evaluation surface 13 and information on the type of light source, the control circuit 16 can generate a plurality of simulated signals corresponding to each wavelength band of the environmental light on the evaluation surface 13 based on the information. Intensity data can be calculated.

A case will be described below using an example in which the user selects, for example, LED as the light source type. After the user selects the light source type, the control circuit 16 immediately obtains the illuminance on the evaluation surface via the sensor unit 15 (step S42).

The control circuit 16 calculates a plurality of simulated intensity data corresponding to each wavelength band of the ambient light based on the illuminance of the ambient light and information regarding the light source type selected by the user (step S43). Furthermore, the control circuit 16 subtracts a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light (for example, D50), and A plurality of intensity data corresponding to each wavelength band of the second evaluation light is calculated (step S44). The control circuit 16 irradiates the evaluation surface with the second evaluation light for which a plurality of intensity data corresponding to each wavelength band are calculated in this way (step S45). As a result, the first evaluation light (for example, D50) is correctly reproduced on the evaluation surface 13. The user can correctly evaluate the finished state of the evaluation object 12 on the evaluation surface 13.

According to this embodiment, the following can be said. The sensor unit 15 is an illuminance meter, and the control unit generates a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the illuminance obtained by the sensor unit 15, and generates a plurality of simulated intensity data corresponding to each wavelength band of the environmental light, and The plurality of simulated intensity data corresponding to each wavelength band of the ambient light are subtracted from the plurality of intensity data corresponding to each wavelength band of the second evaluation light. It has a function to set as strength data.

According to this configuration, correctly adjusted first evaluation light (for example, D50, etc.) can be reproduced on the evaluation surface 13 while taking into consideration the intensity of the environmental light. Therefore, the finished state of the evaluation target object 12 can be evaluated based on the correct color tone, and highly accurate evaluation of the evaluation target object 12 can be realized. Furthermore, since the sensor section 15 is configured with an illuminance meter, the cost can be reduced compared to a case where the sensor section 15 is configured with a spectrophotometer. Furthermore, the process required for correcting (calibrating) the evaluation light can be simplified without requiring the step of irradiating the evaluation surface 13 with the first evaluation light prior to the correction of the evaluation light.

The control unit stores a plurality of intensity data corresponding to each wavelength band of the environmental light for each light source type, and the control unit has a function of allowing a user to select the light source type of the environmental light. According to this configuration, even if a spectrophotometer is not used in the sensor unit 15, by receiving information about the light source type from the user, each wavelength of the environmental light is A plurality of simulated intensity data corresponding to the band can be calculated. Thereby, accurate second evaluation light can be emitted as correction light, and the first evaluation light (for example, D50) can be reproduced together with the environmental light on the evaluation surface 13.
[Fifth embodiment]

With reference to FIG. 12, the lighting device 11 and lighting method of the fifth embodiment will be described.

In this embodiment, the sensor section 15 is arranged in a part of the control light source 14. The sensor section 15 is preferably arranged, for example, at the outer edge of the light diffusion section 18 so that the light emitted from each light emitting element 17 is not blocked by the sensor section 15. The sensor unit 15 is composed of a spectrophotometer, but may also be composed of a luminometer.

The evaluation surface 13 may include a reflector having a known reflectance. The reflective plate 31 is preferably white, for example. It is preferable that the reflectance of the reflection plate 31 is, for example, 30 to 80%. The reflecting plate 31 may be configured to be detachable from the evaluation surface 13. Therefore, the reflection plate 31 may be removed from the evaluation surface 13 after the correction light calibration process is completed.

Alternatively, the entire evaluation surface 13 may be used as a reflector. In this case, the evaluation surface 13 is preferably white. The reflectance of the evaluation surface 13 is preferably 30 to 80%, for example.

A lighting method using the lighting device 11 of this embodiment will be described. Various methods can be used to obtain the second evaluation light that has been corrected (calibrated) with respect to the first evaluation light.

For example, it may be performed as in the first embodiment. That is, the evaluation surface 13 is irradiated with the first evaluation light, and the sensor unit 15 collects a plurality of intensity data corresponding to each wavelength band of the light (light including the first evaluation light and the environmental light) on the evaluation surface 13. Sense. At this time, each value obtained by the sensor unit 15 is attenuated by reflection from the reflector 31 or the evaluation surface 13, so the control circuit 16 divides each value by the reflectance to reduce the attenuation. A plurality of intensity data corresponding to each wavelength band of the light on the previous evaluation surface 13 is obtained.

The control circuit 16 converts the portion exceeding the first evaluation light among the plurality of intensity data corresponding to each wavelength band of light including the first evaluation light and the environmental light into each wavelength band originating from the environmental light. Acquire as multiple intensity data corresponding to. The control circuit 16 subtracts the plurality of intensity data corresponding to each wavelength band of the ambient light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light, and calculates the result of subtracting the plurality of intensity data corresponding to each wavelength band of the first evaluation light. Calculate as multiple pieces of intensity data corresponding to each wavelength band. The evaluation surface 13 is irradiated with this second evaluation light. In this manner, the user may evaluate the evaluation target object 12.

Further, as in the second embodiment, the sensor section 15 may be configured with an illuminance meter, and the illumination method as in the second embodiment may be used. That is, the user selects the light source type of the environmental light, irradiates the evaluation surface 13 with the first evaluation light, and measures the illuminance of the light (light including the first evaluation light and the environmental light) on the evaluation surface 13 by the sensor unit. Detected at 15. At this time, the illuminance obtained by the sensor section 15 is attenuated by reflection from the reflector 31 or the evaluation surface 13, so the control circuit 16 divides this illuminance by the reflectance to obtain the illuminance before attenuation. The illuminance on the evaluation surface 13 can be obtained.

The control circuit 16 subtracts the integral value of a plurality of intensity data corresponding to each wavelength band of the first evaluation light (the illuminance at the evaluation surface 13 of the first evaluation light) from this illuminance before attenuation, and calculates the ambient light. Obtain the illuminance of The control circuit 16 calculates a plurality of simulated intensity data corresponding to each wavelength band of the ambient light based on the illuminance of the ambient light and information regarding the type of light source selected by the user. Further, the control circuit 16 subtracts a plurality of simulated intensity data corresponding to each wavelength band of the ambient light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light, and then subtracts a plurality of simulated intensity data corresponding to each wavelength band of the first evaluation light, A plurality of intensity data corresponding to each wavelength band of light is calculated. The control circuit 16 irradiates the evaluation surface 13 with the second evaluation light for which a plurality of intensity data corresponding to each wavelength band are calculated in this way. In this manner, the user may evaluate the evaluation target object 12.

Alternatively, an illumination method as in the third embodiment may be used. That is, the control circuit 16 immediately acquires a plurality of intensity data corresponding to each wavelength band of the environmental light via the sensor unit 15. At this time, the evaluation surface 13 is not irradiated with any light from the control light source 14, and the evaluation surface 13 is irradiated with only environmental light (indoor lighting 19, etc.). At this time, each value obtained by the sensor unit 15 is attenuated by reflection on the reflector 31 or the evaluation surface 13, so the control circuit 16 divides these illuminances by the reflectance to obtain the values before attenuation. Each value (a plurality of intensity data corresponding to each wavelength band of environmental light) in terms of evaluation is obtained.

Furthermore, the control circuit 16 subtracts the plurality of intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light, and the second evaluation light that is the correction light is subtracted. A plurality of intensity data corresponding to each wavelength band are calculated. The control circuit 16 irradiates the evaluation surface 13 with the second evaluation light for which a plurality of intensity data corresponding to each wavelength band are calculated in this way. In this manner, the user may evaluate the evaluation target object 12.

Alternatively, an illumination method as in the fourth embodiment may be used. That is, the control circuit 16 requests the user to input the light source type of the indoor lighting 19 (environmental light) on the touch panel display, and the user inputs the light source type. The control circuit 16 immediately acquires the illuminance on the evaluation surface 13 via the sensor section 15. At this time, the illuminance obtained by the sensor section 15 is attenuated by reflection from the reflector 31 or the evaluation surface 13, so the control circuit 16 divides this illuminance by the reflectance to obtain the illuminance before attenuation. The illuminance on the evaluation surface 13 is obtained.

The control circuit 16 calculates a plurality of simulated intensity data corresponding to each wavelength band of the ambient light based on the illuminance of the ambient light and information regarding the type of light source selected by the user. Further, the control circuit 16 subtracts a plurality of simulated intensity data corresponding to each wavelength band of the ambient light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light, and then subtracts a plurality of simulated intensity data corresponding to each wavelength band of the first evaluation light, A plurality of intensity data corresponding to each wavelength band of light is calculated. The control circuit 16 irradiates the evaluation surface 13 with the second evaluation light for which a plurality of intensity data corresponding to each wavelength band are calculated in this way. In this manner, the user may evaluate the evaluation target object 12.

According to this embodiment, the following can be said. The sensor section 15 is provided in the control light source 14, and the control section has a function of using the intensity of the light sensed by the sensor section 15 based on the reflectance on the evaluation surface 13. According to this configuration, since the sensor section 15 is arranged on the control light source 14, there is no need to secure a space for installing the sensor section 15 on the evaluation surface 13. Further, the sensor section 15 does not interfere with the evaluation target object 12, and a user-friendly lighting device 11 can be realized. Furthermore, by considering the reflectance, even with such an arrangement, the intensity of the environmental light can be accurately determined. As a result, the second evaluation light that has been accurately corrected (calibrated) can be obtained, and can be used to evaluate the evaluation object 12 with high precision.
[Sixth embodiment]

With reference to FIG. 13, a lighting device 11 and a lighting method according to a sixth embodiment will be described.

In this embodiment, the evaluation surface 13 is composed of a transparent flat plate. The evaluation surface 13 may be, for example, a glass plate or a transparent flat plate made of an acrylic plate or other synthetic resin. In this embodiment, the evaluation surface 13 may be supported by a control light source 14. In this embodiment, the evaluation surface 13 is configured so that the entire evaluation surface 13 has translucency, but it is of course possible that at least a portion of the evaluation surface 13 has a configuration that has translucency.

The sensor section 15 is provided on a line connecting the control light source 14 and the evaluation surface 13. The sensor unit 15 is provided at a position farther than the evaluation surface 13 when viewed from the control light source 14 . The sensor unit 15 may be removably fixed to a wall surface of a room in which the lighting device 11 is installed. The sensor unit 15 is composed of a spectrophotometer, but may also be composed of a luminometer.

A lighting method using the lighting device 11 of this embodiment will be described. Various methods can be used to obtain the second evaluation light that has been corrected (calibrated) with respect to the first evaluation light. For example, the lighting methods of the first to fourth embodiments can be used. With the evaluation surface 13 irradiated with the second evaluation light, which is the correction light, the user places the evaluation target on the surface of the evaluation surface 13 opposite to the surface on the control light source 14 side (the surface on the sensor unit 15 side). 12 is fixed and installed and visually observed from the surface on the sensor section 15 side, the evaluation target object 12 can be transparently evaluated.

According to this embodiment, the following can be said. At least a part of the evaluation surface 13 has translucency, and the sensor section 15 is located on a line connecting the control light source 14 and the evaluation surface 13 and further away from the evaluation surface 13 when viewed from the control light source 14. established in

According to this configuration, it is possible to adopt an effective arrangement when it is desired to evaluate the evaluation target object 12 transparently. Further, when it is difficult to secure a space for installing the sensor section 15 on the evaluation surface 13, problems regarding the arrangement of the sensor section 15 can be solved. Further, the sensor section 15 does not interfere with the evaluation target object 12, and a user-friendly lighting device 11 can be realized. As a result, the second evaluation light that has been accurately corrected (calibrated) can be obtained, and can be used to evaluate the evaluation object 12 with high precision.
[Seventh embodiment]

With reference to FIG. 14, a lighting device 11 and a lighting method according to a seventh embodiment will be described. The lighting device 11 and the lighting method of the present embodiment are used to evaluate the state of the coating (evaluation of the color of the coating) when the evaluation target 12 is a product (plastic, clothing) whose surface is coated. It is suitable for

In this embodiment, the first evaluation light emitted from the control light source 14 is D65 (standard light source), unlike D50. The control light source 14 can emit D65 light (for example, 2000 lx) as the first evaluation light under the control of the control circuit 16. The control light source 14 can, under the control of the control circuit 16, emit second evaluation light that is corrected light that is corrected from the first evaluation light.

The sensor unit 15 is composed of a spectrophotometer, but may also be composed of a luminometer. The sensor section 15 may be detachable from the evaluation surface 13. The sensor section 15 may be arranged in a part of the control light source 14 as in the fifth embodiment. As in the sixth embodiment, the sensor section 15 may be provided on a line connecting the control light source 14 and the evaluation surface 13 at a position farther from the evaluation surface 13 when viewed from the control light source 14.

A lighting method using the lighting device 11 of this embodiment will be described with reference to FIG. 14. FIG. 14 shows the illuminance corresponding to each wavelength band on the evaluation surface 13, and the relative illuminance when the maximum value of the intensity data of the first evaluation light (when λ=455 nm) is set to 1. In this embodiment, the illumination methods of the first to fourth embodiments can be used, except that D65 is used instead of D50 as the first evaluation light. That is, the control circuit 16 uses the sensor unit 15 to acquire a plurality of intensity data corresponding to each wavelength band of the ambient light, or to acquire a plurality of intensity data corresponding to each wavelength band of the ambient light based on the illuminance of the ambient light. Obtain multiple intensity data. The control circuit 16 subtracts a plurality of intensity data corresponding to each wavelength band of the environmental light or a plurality of simulated intensity data from a plurality of intensity data corresponding to each wavelength band of the first evaluation light (D65). are set as a plurality of intensity data corresponding to each wavelength band of the second evaluation light. The control circuit 16 drives the control light source 14 to irradiate the evaluation surface 13 with the second evaluation light. On the evaluation surface 13, this second evaluation light and the ambient light are added together to accurately reproduce D65 (standard light source). In this state, the user can evaluate the evaluation target object 12 with high accuracy.
[Eighth embodiment]

The lighting device 11 and lighting method of the eighth embodiment will be described. The present embodiment is an illumination device 11 and an illumination method suitable for surgeries such as surgery and oral surgery.

The lighting device 11 has a touch panel display connected to the control circuit 16. The control circuit 16 displays on the display an image for selecting whether to illuminate with D50 (auxiliary standard light source) or D65 (standard light source). By operating the touch panel, the user can select whether to illuminate the patient, which is the evaluation object 12, at D50 or D65. Generally, during surgery, the surgical field is illuminated with white light (10,000 to 100,000 lx) of about 3,500 to 4,500 K (Kelvin).

In this embodiment, D50 or D65 is selected using a touch panel display, but the switching mechanism is not limited to this. Of course, a switch for switching between these may be provided near the control light source 14, and the user may switch between the two by operating the switch.

The evaluation surface 13 constitutes a part of the operating table. The illuminance (maintenance illuminance) of the illumination (environmental light) in the operating room is, for example, 1000 lx.

The sensor unit 15 is composed of a spectrophotometer, but may also be composed of a luminometer. The sensor section 15 may be detachable from the operating table (evaluation surface 13). The sensor section 15 may be arranged in a part of the control light source 14 as in the fifth embodiment.

A lighting method using the lighting device 11 of this embodiment will be described. In this embodiment, the illumination methods of the first to fourth embodiments can be used, except that either D50 or D65 is switched and used as the first evaluation light. The user can perform good treatment on the evaluation target (in this embodiment, the patient) using the second evaluation light that is the correction light.

According to this embodiment, it is possible to provide an illumination device 11 and an illumination method suitable for surgeries such as surgery and oral surgery.
[Ninth embodiment]

The lighting device 11 and lighting method of the ninth embodiment will be described. In the lighting device 11 and lighting method of this embodiment, the sensor section 15 is not provided.

A lighting method using the lighting device 11 of this embodiment will be described.

When the lighting device 11 is activated, the control circuit 16 displays an image requesting input of environmental conditions on the touch panel display. The user checks the interior of the room and inputs environmental conditions on the touch panel display. Examples of environmental conditions include a factory, an office in an office, a warehouse, an operating room, etc., but other environmental conditions may also be selectable. Based on this input, the control circuit 11 sets the illuminance of the ambient light on the evaluation surface 13 to 500lx in a factory, 750lx in an office or other office, 200lx in a warehouse, and 1000lx in an operating room. presume. The information regarding the illuminance is stored in the storage unit 26 in association with the information regarding the location selected by the user. Furthermore, if the user knows the illuminance of the ambient light, the illuminance of the ambient light may be set by directly inputting a numerical value into the control circuit 16 via a keyboard or the like.

Further, the control circuit 16 displays an image requesting the user to input regarding the light source type of the indoor lighting 19 (environmental light). The user checks the lighting 19 installed in the room and inputs the type of light source on the touch panel display (step S21). Examples of light source types include LEDs, fluorescent lamps, incandescent lamps, etc., but other light source types may also be selectable. Incidentally, spectra of general light sources including a plurality of intensity data for each wavelength band corresponding to the light source type are well known, and examples thereof are shown in FIGS. 7 to 9.

The storage unit 26 of the control circuit 16 stores a general light source spectrum (values on the mountain-shaped ridge lines shown in FIGS. 7 to 9) that includes a plurality of intensity data for each wavelength band corresponding to these light source types. ) is remembered. Note that the integral value obtained by integrating or adding together each value of this spectrum (the value corresponding to the area of the mountain shape shown in FIGS. 7 to 9) approximately corresponds to the illuminance on the evaluation surface 13, or This value has an extremely high correlation with the illuminance on the surface 13. Therefore, if there is information regarding the illuminance (environmental conditions) on the evaluation surface 13 and information regarding the light source type, the control circuit 16 simulates a plurality of intensity data corresponding to each wavelength band of the environmental light on the evaluation surface 13. It can be calculated according to

An example will be described below in which the user selects, for example, a factory as the environmental condition, and the user selects, for example, LED as the light source type. After the user selects the light source type, the control circuit 16 responds to each wavelength band of the ambient light based on the estimated value (500 lx) of the illuminance of the ambient light on the evaluation surface 13 and information regarding the light source type selected by the user. Calculate multiple simulated intensity data. Further, the control circuit 16 subtracts a plurality of simulated intensity data corresponding to each wavelength band of the ambient light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light, and then subtracts a plurality of simulated intensity data corresponding to each wavelength band of the first evaluation light, A plurality of intensity data corresponding to each wavelength band of light is calculated (calibration step). The control circuit 16 irradiates the evaluation surface 13 with this second evaluation light as correction light. As a result, the first evaluation light (for example, D50, D65) is reproduced on the evaluation surface 13. The user can correctly evaluate the finished state of the evaluation object on the evaluation surface 13. In this embodiment, the case where the user selects a factory as the environmental condition has been described as an example, but the same applies even if the user selects an office such as an office, a warehouse, or an operating room as the environmental condition. Further, in this embodiment, the case where the user selects LED as the light source type is described as an example, but the same applies even when the user selects a fluorescent lamp or an incandescent lamp as the light source type.

According to this embodiment, since the sensor section 15 can be omitted, the manufacturing cost of the lighting device 11 can be reduced.

The embodiments described above can be implemented with various substitutions and modifications. Furthermore, it is also possible to realize the invention by appropriately combining the above embodiments.

11 Lighting device 12 Evaluation object 13 Evaluation surface 14 Control light source 15 Sensor section 16 Control circuit 17 Light emitting element 18 Light diffusion section 19 Indoor lighting 21 Light source section 22 Fluorescent layer 23 MPU
24 Timing generation circuit 25 Driver 26 Storage unit 27 Bus 31 Reflector

Claims (16)

An evaluation surface installed in the room,
a controlled light source capable of emitting first evaluation light and second evaluation light onto the evaluation surface;
a sensor section provided on the evaluation surface or at an outer edge of the evaluation surface, the sensor section being capable of sensing the intensity of environmental light and the intensity of the first evaluation light on the evaluation surface;
Based on the intensity of the light sensed by the sensor section, an intensity is calculated by subtracting the intensity of the environmental light from the intensity of the first evaluation light, and the second evaluation light having this intensity is sent from the control light source to the control light source. A control unit that injects onto the evaluation surface,
A lighting device comprising: The sensor section is a spectrophotometer,
The control unit includes a plurality of intensity data corresponding to each wavelength band of light obtained by adding the environmental light obtained by the sensor unit and the first evaluation light, and the first evaluation light stored in advance. a plurality of intensity data corresponding to each wavelength band of the ambient light, and a plurality of intensity data corresponding to each wavelength band of the first evaluation light based on the plurality of intensity data corresponding to each wavelength band of the first evaluation light. The illumination according to claim 1, having a function of setting a plurality of intensity data corresponding to each wavelength band of the second evaluation light by subtracting a plurality of intensity data corresponding to each wavelength band of the second evaluation light from a plurality of intensity data corresponding to each wavelength band of the second evaluation light. Device. The sensor unit is an illuminance meter,
The control unit includes:
Calculating the illuminance of the environmental light by subtracting an integral value obtained by integrating a plurality of intensity data corresponding to each wavelength band of the first evaluation light from the illuminance obtained by the sensor unit,
generating a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the illuminance of the environmental light;
Each wavelength of the second evaluation light is obtained by subtracting the plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light. The lighting device according to claim 1, having a function of setting a plurality of intensity data corresponding to a band. The sensor section is a spectrophotometer,
The control unit selects a plurality of intensity data corresponding to each wavelength band of the environmental light obtained by the sensor unit from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. The lighting device according to claim 1, wherein the subtracted data is set as a plurality of intensity data corresponding to each wavelength band of the second evaluation light. The sensor unit is an illuminance meter,
The control unit includes:
Generating a plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the illuminance obtained by the sensor unit,
Each wavelength of the second evaluation light is obtained by subtracting the plurality of simulated intensity data corresponding to each wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light. The lighting device according to claim 1, wherein the lighting device is set as a plurality of intensity data corresponding to a band. The control unit stores a plurality of intensity data corresponding to each wavelength band of the environmental light for each light source type,
The lighting device according to claim 3 or 5, wherein the control unit has a function of allowing a user to select the light source type of the environmental light. The lighting device according to any one of claims 1 to 6, wherein the sensor section is removable from the evaluation surface. An evaluation surface installed in the room,
a controlled light source capable of emitting first evaluation light and second evaluation light onto the evaluation surface;
a sensor unit capable of sensing the intensity of environmental light and the intensity of the first evaluation light on the evaluation surface;
Based on the intensity of the light sensed by the sensor section, an intensity is calculated by subtracting the intensity of the environmental light from the intensity of the first evaluation light, and the second evaluation light having this intensity is sent from the control light source to the control light source. A control unit that injects onto the evaluation surface,
Equipped with
At least a portion of the evaluation surface has translucency,
The sensor section is a lighting device provided on a line connecting the control light source and the evaluation surface and at a position farther than the evaluation surface when viewed from the control light source. Emitting first evaluation light from a control light source to an evaluation surface irradiated with environmental light;
Sensing the intensity of the environmental light and the intensity of the first evaluation light on the evaluation surface by a sensor section provided on the evaluation surface or at the outer edge of the evaluation surface ,
Calculating the intensity of the environmental light from the combined intensity of the environmental light and the first evaluation light sensed by the sensor unit,
An illumination method in which second evaluation light having an intensity obtained by subtracting the intensity of the environmental light from the intensity of the first evaluation light is emitted from the control light source onto the evaluation surface. The sensor section is a spectrophotometer,
A plurality of intensity data corresponding to each wavelength band of light obtained by adding the environmental light and the first evaluation light obtained by the sensor unit, and each wavelength band of the first evaluation light stored in advance. calculating a plurality of intensity data corresponding to each wavelength band of the ambient light based on the plurality of corresponding intensity data;
A plurality of intensity data corresponding to each wavelength band of the second evaluation light is obtained by subtracting a plurality of intensity data corresponding to each wavelength band of the environmental light from a plurality of intensity data corresponding to each wavelength band of the first evaluation light. The illumination method according to claim 9 , wherein the illumination method is set as intensity data of. The sensor unit is an illuminance meter,
Calculating the illuminance of the environmental light by subtracting an integral value obtained by integrating a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance from the illuminance obtained by the sensor unit,
generating a plurality of simulated intensity data corresponding to the wavelength band of the environmental light from the illuminance of the environmental light;
Each wavelength band of the second evaluation light is obtained by subtracting the plurality of simulated intensity data corresponding to the wavelength band of the environmental light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light. The illumination method according to claim 9 , wherein the illumination method is set as a plurality of intensity data corresponding to. Sensing the intensity of environmental light on the evaluation surface by a sensor section provided on the evaluation surface or at the outer edge of the evaluation surface ,
An illumination method in which second evaluation light having an intensity obtained by subtracting the intensity of the environmental light from the intensity of the first evaluation light is emitted from a controlled light source onto the evaluation surface. The sensor section is a spectrophotometer,
A plurality of intensity data corresponding to each wavelength band of the environmental light obtained by the sensor unit is subtracted from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. The illumination method according to claim 12 , wherein the illumination method is set as a plurality of intensity data corresponding to each wavelength band of the second evaluation light. The sensor unit is an illuminance meter,
Generating a plurality of simulated intensity data corresponding to the wavelength band of the environmental light from the illuminance obtained by the sensor unit,
The second evaluation is performed by subtracting the plurality of simulated intensity data corresponding to each wavelength band of the ambient light from the plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. 13. The illumination method according to claim 12 , wherein a plurality of intensity data are set corresponding to each wavelength band of light. Controlling second evaluation light having an intensity obtained by subtracting a plurality of intensity data corresponding to each wavelength band of the environmental light stored in advance from a plurality of intensity data corresponding to each wavelength band of the first evaluation light stored in advance. An illumination method that emits light from a light source onto the evaluation surface . 16. The lighting method according to claim 15 , wherein the plurality of intensity data corresponding to each wavelength band of the pre-stored ambient light are determined based on the environmental conditions and light source type selected by the user.

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