JP2014203533A - Illumination apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress variations in object appearance.SOLUTION: An Illumination apparatus 10 includes: a light emitting part 110; a reflection light measurement part 120; and a light emission control part 130. The light emitting part 110 is a light source of the Illumination apparatus 10, and illuminates an illumination area 20. The reflection light measurement part 120 measures reflection light from an object 30 to be illuminated disposed at the illumination area 20. The light emission control part 130 controls the light emitting part 110 by using a measurement result of the reflection light measurement part 120 so that a spectrum of synthetic light of external light and light from the light emitting part 110 in the illumination area 20 satisfies a criterion.

Description

  The present invention relates to a lighting device.

  One application of a light-emitting device is a lighting device. As a technique related to the control of the illumination device, there are techniques described in Patent Documents 1 and 2, for example.

  The technique described in Patent Document 1 controls an indoor lighting device based on color temperature and illuminance outdoors. Further, the technique described in Patent Document 2 describes that the daylight level is estimated using the date, and the lighting device is controlled based on the estimated daylight level.

JP-A-4-206391 Japanese National Patent Publication No. 10-500454

  The appearance of the color of an object changes depending on the light irradiated to the object. Usually, the light that illuminates an object is a combined light of natural light and light from a lighting device. For this reason, the spectrum of the light that illuminates the object is not constant, and therefore the appearance of the color of the object changes.

  An example of a problem to be solved by the present invention is to provide a lighting device that can suppress a change in the appearance of an object color.

The invention according to claim 1 is a light-emitting unit that illuminates the illumination area;
A reflected light measuring unit for measuring reflected light from the irradiated object arranged in the illumination area;
Using the measurement result of the reflected light measurement unit, a light emission control unit that controls the light emission unit so that the spectrum of the combined light of the light emitted from the light emission unit and outside light in the illumination region satisfies a standard;
It is an illuminating device provided with.

It is a figure which shows the function structure of the illuminating device which concerns on embodiment. It is a figure which shows the function structure of the illuminating device which concerns on Example 1. FIG. It is a figure which shows the function structure of the illuminating device which concerns on Example 2. FIG. It is a figure which shows the function structure of the illuminating device which concerns on Example 3. FIG. 12 is a flowchart illustrating an operation of the lighting apparatus according to the third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  In the following description, each component of the lighting device 10 is not a hardware unit configuration but a functional unit block. Each component of the lighting device 10 includes an arbitrary computer CPU, memory, a program loaded in the memory, a storage medium such as a hard disk for storing the program, and an arbitrary hardware and software, mainly a network connection interface. Realized by combination. There are various modifications of the implementation method and apparatus.

  FIG. 1 is a diagram illustrating a functional configuration of a lighting device 10 according to the embodiment. The illumination device 10 includes a light emitting unit 110, a reflected light measuring unit 120, and a light emission control unit 130. The light emitting unit 110 is a light source of the illumination device 10 and illuminates the illumination area 20. The reflected light measurement unit 120 measures reflected light from the irradiated object 30 arranged in the illumination area 20. The light emission control unit 130 controls the light emitting unit 110 using the measurement result of the reflected light measuring unit 120 so that the spectrum of the combined light of the light emitted from the light emitting unit 110 and the external light in the illumination region 20 satisfies the standard.

  Here, the light emitting unit 110 includes, for example, at least one of an organic EL (Organic Electroluminescence) element and an LED (Lignt Emitting Diode). However, the light emitting unit 110 may have other light emitters as long as the spectrum can be adjusted.

  Moreover, the reference | standard which the spectrum of the above-mentioned synthetic | combination light should satisfy | fill is a parameter | index required in order to reproduce the desired spectrum, The value has a certain amount of width | variety. This index is, for example, a predetermined range of intensity for each of a plurality of wavelengths, or a relative ratio thereof. However, another index may be used as a reference as long as the spectrum can be substantially reproduced.

  According to the present embodiment, the light emission control unit 130 controls the current value supplied to the light emitting unit 110 so that the spectrum of the combined light of the light from the light emitting unit 110 and the external light in the illumination region 20 becomes the reference spectrum. . For this reason, it can suppress that the appearance of the thing arrange | positioned in the illumination area | region 20 changes with external light.

  Thereby, for example, when the designer adjusts the color of the fabric, the color of the fabric can be accurately recognized regardless of the place and time. Moreover, it can be confirmed at the time of adjustment how the decorative object looks when the place is changed to the outside, the room, the showroom or the like.

  FIG. 2 is a diagram illustrating a functional configuration of the illumination device 10 according to the first embodiment. The illumination device 10 according to the present embodiment has the same configuration as that of the illumination device 10 according to the embodiment, except that the light emitting unit 110 includes a plurality of types of light emitting regions 112.

  The plurality of types of light emitting regions 112 have different emission spectra. For example, when each of the light emitting regions 112 has organic EL elements, these organic EL elements have, for example, different organic layer structures. Moreover, when each of the light emission area | region 112 has LED, these LEDs differ in the structure of the light emitting layer, for example. The plurality of light emitting areas 112 are, for example, red, green, and blue light emitting areas. However, the light emitting area 112 may have light emitting areas of other colors. In addition, at least one light emitting region 112 is classified into the same color as the other light emitting regions 112, but the spectrum peak positions may be slightly different.

  The light emission control unit 130 adjusts the spectrum of the light emitting unit 110 by controlling the light emission intensity of the plurality of light emitting regions 112 independently of each other.

  The irradiated object 30 has a color that easily reflects external light, such as white or silver. Then, the reflected light measurement unit 120 measures the intensity at each of a plurality of predetermined wavelengths among the reflected light from the irradiation object 30. And the light emission control part 130 controls the light emission intensity | strength of the some light emission area | region 112 using the intensity | strength according to these some wavelength.

  Here, the light emission control unit 130 calculates the difference between the measurement result of the reflected light measurement unit 120 and a predetermined reference value for each wavelength, and the light emission intensity of the light emitting region 112 so as to fill in the difference for each wavelength. May be determined. In this case, the light emission control unit 130 stores data indicating the relationship between the amount of current and the intensity for each wavelength for each of the light emitting regions 112. Then, using this data, the light emission intensity (that is, the current value to be supplied) of the light emitting region 112 is determined.

  Also in this example, the same effect as that of the embodiment can be obtained. In addition, the plurality of types of light emitting regions 112 have different emission spectra. For this reason, the light emission control part 130 can adjust the spectrum of the light emission part 110 easily by controlling the light emission intensity of the some light emission area | region 112 mutually independently.

(Example 2)
FIG. 3 is a diagram illustrating a functional configuration of the illumination device 10 according to the second embodiment. The lighting device 10 according to the present embodiment has the same configuration as that of the lighting device 10 according to the first embodiment, except that the mode storage unit 132 and the input unit 140 are included.

  In the present embodiment, a plurality of spectrum references for the combined light of the light from the light emitting unit 110 and the external light in the illumination region 20 are set. Specifically, these standards include, for example, a standard for reproducing sunlight (natural light), a standard for reproducing light from a fluorescent lamp, and a standard for reproducing light from an incandescent bulb. There is.

  And the mode memory | storage part 132 has memorize | stored the data (For example, the intensity ratio between several wavelengths, or the absolute value of each intensity | strength of several wavelengths) which shows these some references | standards for every reference | standard. Then, the user of the lighting device 10 inputs information indicating a reference to be used by the lighting device 10 to the input unit 140. The light emission control unit 130 reads data indicating one reference from the mode storage unit 132 according to the information input from the input unit 140, and controls the light emitting region 112 of the light emitting unit 110 according to the read data.

  According to the present embodiment, the same effect as that of the first embodiment can be obtained. In addition, the mode storage unit 132 stores a plurality of criteria, and the light emission control unit 130 controls the light emitting unit 110 so as to satisfy one of these criteria. Therefore, the illuminating device 10 can reproduce the light from a plurality of types of light sources with high accuracy.

Example 3
FIG. 4 is a diagram illustrating a functional configuration of the lighting apparatus 10 according to the third embodiment. The lighting device 10 according to the present embodiment has the same configuration as the lighting device 10 according to the embodiment or Examples 1 and 2 except for the following points. This figure shows a case similar to the second embodiment.

  In the present embodiment, a plurality of color targets are used as the irradiated object 30. The colors of the plurality of color targets are different from each other. Examples of colors used here include red, green, blue, yellow, and magenta, but are not limited to these colors. The number of colors in the color table is not particularly limited.

  The light emission control unit 130 controls the light emitting unit 110 according to the intensity of the reflected light for each color target. For example, the intensity reference value is determined for each color target, and the light emission control unit 130 calculates the difference between the measurement result of the reflected light measurement unit 120 and the above-described reference value for each color target. And the light emission control part 130 determines the light emission intensity of the light emission area | region 112 so that the difference according to these wavelengths may be filled. In this case, the light emission control unit 130 stores data indicating the relationship between the amount of current and the intensity for each wavelength for each of the light emitting regions 112. Then, using this data, the light emission intensity (that is, the current value to be supplied) of the light emitting region 112 is determined.

  The input unit 140 includes a plurality of color target input units 142. The color target input unit 142 is provided corresponding to each of a plurality of color targets. When the color target input unit 142 is selected by the user, color target information indicating a color target corresponding to the color target input unit 142 is output to the light emission control unit 130. The light emission control unit 130 recognizes which color target the reflected light detected by the reflected light measurement unit 120 corresponds to based on the color target information.

  FIG. 5 is a flowchart showing the operation of the illumination device 10 according to the present embodiment. First, the user arranges a color target as the irradiation object 30 in the illumination area 20. Then, the user selects the color target input unit 142 corresponding to the color target arranged in the illumination area 20. The color target input unit 142 outputs the color target information to the light emission control unit 130. Thereby, the color target information is input to the light emission control unit 130 of the illumination device 10 (step S10).

  Then, the reflected light measurement unit 120 measures the reflected light from the irradiation object 30 (step S20). The light emission control unit 130 stores the measurement result by the reflected light measurement unit 120 in association with the color target information received from the color target input unit 142.

  The user and the illumination device 10 perform the processes shown in steps S10 and S20 until the measurement of the reflected light is completed for all the color targets (step S30: No).

  And the light emission control part 130 reads a reference | standard from the mode memory | storage part 132 (step S40). Information indicating which reference is read out is input from the user via the input unit 140. Then, the light emission control unit 130 calculates the light emission condition of the light emitting unit 110 (for example, the amount of current for each light emitting region 112) (step S50).

  Also in this example, the same effect as in the embodiment or Examples 1 and 2 can be obtained. Moreover, since the light from the desired light source is reproduced using a plurality of color targets, the reproducibility of the light source is improved.

  As mentioned above, although embodiment and the Example were described with reference to drawings, these are illustrations of this invention and can also employ | adopt various structures other than the above.

DESCRIPTION OF SYMBOLS 10 Illuminating device 20 Illumination area 30 Object 110 Light emission part 112 Light emission area 120 Reflected light measurement part 130 Light emission control part 132 Mode memory | storage part 140 Input part 142 Color target input part

Claims (5)

A light emitting unit for illuminating the illumination area;
A reflected light measuring unit for measuring reflected light from the irradiated object arranged in the illumination area;
Using the measurement result of the reflected light measurement unit, a light emission control unit that controls the light emission unit so that the spectrum of the combined light of the light emitted from the light emission unit and outside light in the illumination region satisfies a standard;
A lighting device comprising: The lighting device according to claim 1.
The irradiated object is a color target,
The reflected light measurement unit measures the intensity of the reflected light for each of the plurality of color targets having different colors.
The illuminating device, wherein the light emission control unit controls the light emitting unit according to the intensity of the reflected light for each color target so that the spectrum of the combined light satisfies the reference. The lighting device according to claim 1 or 2,
There are multiple types of standards,
Mode storage means for storing the plurality of types of the reference;
The light emission control unit reads the one reference from the mode storage unit, and controls the light emission unit to satisfy the read reference. The lighting device according to claim 1.
The light emission control unit is an illuminating device that controls the light emitting unit so that the intensity of each wavelength of the combined light satisfies a standard so that a spectrum of the combined light satisfies the standard. In the illuminating device as described in any one of Claims 1-4,
The light emitting unit has a plurality of light emitting regions having different emission spectra from each other,
The light emission control unit adjusts the spectrum of the light emitting unit by controlling the light emission intensity of the plurality of light emitting regions.

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