JP2018125196A - Illumination device and illumination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device for producing a variety of visual effects only by illumination light.SOLUTION: Disclosed is an illumination device 1 which includes: a projector 10 including a light source part for outputting visible light of different color components for every time and outputting and modulating the visible light on a pixel basis; and a control part 20 for controlling the projector 10. Under controlling of the control part 20, the light source part of the projector 10 varies the spectral distribution of the visible light without varying a color component of the visible light.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting device and a lighting method.

  Most of the general lighting fixtures are made as a substitute for sunlight, and are made to illuminate a certain space uniformly and reproduce the same color appearance as that under sunlight. As a result, general lighting fixtures have little function beyond solar replacement.

  On the other hand, in recent years, there is an illumination device using a projector (see, for example, Patent Literature 1). The illumination device described in Patent Literature 1 includes a projector and an illumination control device that controls the projector. This illuminating device can project image light within a range in which illumination light is irradiated. For example, this lighting device can project a guideline indicating a portion to be cut with a kitchen knife as image light while brightly illuminating the hand with illumination light when the food is cut with a kitchen knife in cooking.

Japanese Patent Laid-Open No. 2015-91008

  The illumination device described in Patent Document 1 can produce a visual effect with image light while maintaining the original function required for illumination in which a space or an object is illuminated with illumination light. However, the illumination device described in Patent Document 1 cannot produce various visual effects only with illumination light.

  This invention is made | formed in view of the said situation, The place made into the subject is providing the illuminating device and the illuminating method which produce various visual effects only with illumination light.

In order to solve the above-described problem, a lighting device according to the present invention includes:
A light source unit that outputs visible light having different color components every time;
A display element unit that modulates and outputs the visible light in units of pixels;
A control unit for controlling the light source unit and the display element unit;
A lighting device comprising:
The light source unit is configured to change the spectral distribution of the visible light without changing the color component of the visible light under the control of the control unit.

In the lighting device, for example,
The light source unit is
A white light source that outputs white light;
A color wheel that rotates under the control of the control unit and converts the white light into the visible light;
With
The color wheel includes a plurality of band pass filter groups that transmit light corresponding to each color component of the visible light,
At least one of the plurality of bandpass filter groups can be configured to include a plurality of bandpass filters having the same color component of transmitted light and different spectral distributions of the transmitted light.

In the lighting device, for example,
The light source unit includes a plurality of light source groups that output light corresponding to each color component of the visible light,
At least one of the plurality of light source groups can be configured to include a plurality of light sources that output light having the same color component and different spectral distributions.

In the lighting device, for example,
The light source unit can be configured to include a wavelength programmable light source in which a spectral distribution characteristic of output light is controlled by controlling a built-in digital micromirror device.

In order to solve the above problems, an illumination method according to the present invention includes:
A light source unit that outputs visible light having different color components every time; a display element unit that modulates and outputs the visible light in units of pixels; and a control unit that controls the light source unit and the display element unit. A lighting method for illuminating an object using a lighting device,
The control unit controls the light source unit to change the spectral distribution of the visible light without changing the color component of the visible light.

In the above illumination method, for example,
The control unit emits a white light source included in the light source unit and rotates a color wheel included in the light source unit, and the white light of the white light source is a bandpass filter included in the color wheel, and the color of transmitted light. The white light can be converted to the visible light by sequentially applying to a plurality of band pass filters having the same components but different spectral distributions of the transmitted light.

In the above illumination method, for example,
The control unit may be configured to sequentially emit a plurality of light sources that are light sources included in the light source unit and that output light having the same color component and different spectral distributions.

Here, in this specification, “the color components are the same” means that a person perceives the same light source color. For example, in the present specification, two lights in the L ^* a ^* b ^* coordinate system in which the color difference ΔE is in a range where ΔE = 1.3.0 is preferably less than ΔE = 6.5. “Color components are the same”. On the other hand, in this specification, “the color components are different” means that a person perceives that they are not the same light source color. For example, two lights in a range where ΔE = 13.0 or more are referred to as “lights having different color components” in this specification.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device and illumination method which produce various visual effects only with illumination light can be provided.

It is a figure which shows the structure of the illuminating device which concerns on this invention. It is a figure which shows the structure of the projector of this invention. (A) It is a figure which shows the structure of the color wheel of this invention. (B) It is a figure which shows the spectral distribution of the transmitted light in the color wheel of (A). (A) It is a figure which shows the structure of the color wheel which concerns on the modification of this invention. (B) It is a figure which shows the spectral distribution of the transmitted light in the color wheel of (A).

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an illumination device and an illumination method according to the present invention will be described with reference to the accompanying drawings.

(Lighting device)
In FIG. 1, the illuminating device 1 which concerns on this embodiment is shown. The lighting device 1 includes a projector 10 and a control unit 20 that controls the projector 10. As the projector 10, for example, a DLP (Digital Light Processing: registered trademark) projector can be used.

  As shown in FIG. 2, the projector 10 includes a white light source 11, a disk-shaped color wheel 12, a digital micromirror device (hereinafter, DMD) 13, and at least one lens 14. The projector 10 of this embodiment and the conventional DLP projector are greatly different in the configuration of the color wheel 12, and the configurations of the white light source 11, the DMD element 13, and the lens 14 are common.

  The white light source 11 and the color wheel 12 correspond to the “light source unit” of the present invention. The white light source 11 includes at least one LED that outputs white light under the control of the control unit 20. The color wheel 12 rotates under the control of the control unit 20 and converts the white light of the white light source 11 into visible light having a different color component every time.

  The color wheel 12 includes a plurality of band pass filter groups that transmit light corresponding to each color component of visible light. For example, as shown in FIG. 3, the color wheel 12 includes a bandpass filter group R that transmits light corresponding to the red component of visible light and a bandpass filter group G that transmits light corresponding to the green component of visible light. And a band-pass filter group B that transmits light corresponding to the blue component of visible light, and a band-pass filter W that transmits white light.

  Each band-pass filter group of the color wheel 12 includes a plurality of band-pass filters having the same color component of transmitted light and different spectral distributions of transmitted light. The bandpass filter group R includes bandpass filters r1 and r2 in which the color component of the transmitted light is red and the spectral distribution of the transmitted light is different. The bandpass filter group G includes bandpass filters g1 and g2 in which the color component of the transmitted light is green and the spectral distribution of the transmitted light is different. The bandpass filter group B includes bandpass filters b1 and b2 in which the color component of the transmitted light is blue and the spectral distribution of the transmitted light is different. For example, blue visible light that has passed through the bandpass filter b1 and blue visible light that has passed through the bandpass filter b2 have different spectral distributions, but are perceived by the human eye as blue light source colors.

  The DMD 13 and the lens 14 correspond to the “display element portion” of the present invention. The DMD 13 turns on / off the light of each pixel depending on whether the mirror assigned to each pixel reflects the visible light that has passed through the color wheel 12 toward the lens 14.

  The control unit 20 is configured by, for example, a computer or IC including a CPU and a memory. The control unit 20 may be provided inside the projector 10.

  The control unit 20 controls the white light source 11, the color wheel 12, and the DMD 13 based on a control program or an external command stored in advance in the memory. Specifically, the control unit 20 changes the color component of the visible light projected from the lens 14 for each region corresponding to each pixel of the DMD 13 within a predetermined time set by a control program or an external command. The white light source 11, the color wheel 12, and the DMD 13 are controlled so that the spectral distributions of the visible light are made different from each other. Of course, the control unit 20 can also change the color component of the visible light projected from the lens 14 for each region corresponding to each pixel of the DMD 13 within a predetermined time.

  As described above, the illumination device 1 according to the present embodiment has a spectral distribution of visible light (illumination light) output from the projector 10 at predetermined time intervals and in a plurality of regions without changing the color components. Only can be different. As a result, for example, in stage lighting, theater lighting, advertising lighting, etc., only the change in the appearance of the object (change in object color) without making the viewer aware of the change in illumination light (change in light source color) It becomes possible to be conscious.

  Therefore, according to the illuminating device 1 which concerns on this embodiment, a various visual effect can be produced only with illumination light in a predetermined | prescribed time interval and a several area | region. Note that the illumination device 1 according to the present embodiment can output several types of white light having different spectral distributions, and different spectral distributions by changing the color components of visible light (illumination light) in a plurality of regions. You can also.

(Lighting method)
Next, the illumination method according to this embodiment will be described. The illumination method according to the present embodiment is an illumination method that illuminates an object (for example, the entire room) using the illumination device 1 described above.

  In the illumination method according to the present embodiment, the control unit 20 controls at least the white light source 11, the color wheel 12, and the DMD 13, and visible light (from the projector 10) at a predetermined time interval and in a plurality of regions. Illumination light) is varied only in the spectral distribution without changing its color component.

  Specifically, the control unit 20 causes the white light source 11 to emit light and rotates the color wheel 12 according to the control program so that the white light of the white light source 11 has the same color component of the transmitted light and the transmitted light has a different spectral distribution. A plurality of bandpass filters (for example, bandpass filter b1 and bandpass filter b2) are sequentially applied.

  The control unit 20 controls the white light source 11 and the color wheel 12 as described above, and controls the DMD 13 according to the control program to turn on / off the light of each pixel of the DMD 13. Accordingly, visible light (illumination light) output from the projector 10 can be made to have different spectral distributions without changing the color components in a plurality of regions corresponding to each pixel. As a result, for example, in stage lighting, theater lighting, advertising lighting, etc., only the change in the appearance of the object (change in object color) without making the viewer aware of the change in illumination light (change in light source color) It becomes possible to be conscious.

  Therefore, according to the illumination method according to the present embodiment, various visual effects can be produced with only illumination light at a predetermined time interval and in a plurality of regions. In addition, the illumination method according to the present embodiment can output several types of white light having different spectral distributions, and can vary the spectral distribution by changing the color components of visible light (illumination light) in a plurality of regions. You can also.

[Modification]
As mentioned above, although embodiment of the illuminating device and illumination method which concern on this invention was described, this invention is not limited to the said embodiment. Hereinafter, modifications of the lighting device and the lighting method according to the present invention will be described.

  The configuration of the color wheel 12 includes a plurality of band-pass filter groups that transmit light corresponding to each color component of visible light, and at least one of the plurality of band-pass filter groups has the same color component of the transmitted light and transmitted light. If a plurality of band-pass filters having different spectral distributions are provided, they can be appropriately changed. For example, the color wheel 12 may include a band pass filter group that transmits light corresponding to color components other than RGB.

  Instead of the color wheel 12, a color wheel 12 'shown in FIG. 4 may be used. The color wheel 12 ′ has a plurality of bands in which the peak wavelength of transmitted light changes linearly in the wavelength region of visible light (for example, 400 to 700 nm), the transmitted light has the same color component, and the transmitted light has different spectral distributions. It is a linear variable band pass filter provided with a pass filter. As the linear variable bandpass filter, for example, an interference filter in which the peak wavelength of transmitted light changes in the visible light range by rotation, that is, a circular linear filter can be used.

  The color wheel 12 'includes 24 band pass filters. Among the 24 bandpass filters, a plurality of bandpass filters having the same color component of the transmitted light and different spectral distributions of the transmitted light constitute one bandpass filter group. For example, the band-pass filter group B that transmits light corresponding to the blue component of visible light includes four band-pass filters.

  In the above embodiment, the “light source unit” of the present invention is configured by the white light source 11 and the color wheel 12, but may be configured by a plurality of light source groups that output light corresponding to each color component of visible light. In this case, the color wheel 12 is unnecessary.

  When the “light source unit” is composed of a plurality of light source groups, at least one of the plurality of light source groups needs to include a plurality of light sources that output light having the same color component and different spectral distributions. For example, a light source group that outputs light corresponding to a blue component includes first and second blue light sources in which the color component of the output light is blue and the spectral distribution of the output light is different. The blue visible light output from the first blue light source and the blue visible light output from the second blue light source have different spectral distributions, but both are perceived as a blue light source color by human eyes. .

  In the illumination method of the present invention when the “light source unit” is configured by a plurality of light source groups, the control unit of the present invention sequentially emits a plurality of light sources that output light having the same color component and different spectral distributions. Thereby, similarly to the above-described embodiment, various visual effects can be generated with only illumination light at a predetermined time interval and in a plurality of regions. In this case as well, several types of white light having different spectral distributions can be output, and the spectral distribution can be made different by changing the color components of visible light (illumination light) in a plurality of regions.

  The “light source unit” can be configured by a wavelength programmable light source in which the spectral distribution characteristics of the output light are controlled by controlling the built-in digital micromirror device (DMD). The wavelength programmable light source is controlled to output light having the same color component and different spectral distributions. The illumination device using the wavelength programmable light source can output several types of white light having different spectral distributions as described above, and the spectral distribution by changing the color components of visible light (illumination light) in a plurality of regions. Can be different.

  The “light source unit” can output visible light having a different color component every time and can change the spectral distribution of visible light without changing the color component of visible light under the control of the control unit 20. In this case, the configuration can be changed as appropriate.

  The “display element portion” of the present invention can be appropriately changed in configuration as long as visible light can be modulated and output in units of pixels.

  The “control unit” of the present invention can control the light source unit and the display element unit, and can change the spectral distribution of the visible light without changing the color component of the visible light output from the light source unit. The configuration can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10 Projector 11 White light source 12 Color wheel 13 Digital micromirror device (DMD)
14 Lens 20 Control unit

Claims (7)

A light source unit that outputs visible light having different color components every time;
A display element unit that modulates and outputs the visible light in units of pixels;
A control unit for controlling the light source unit and the display element unit;
A lighting device comprising:
The light source unit is configured to change the spectral distribution of the visible light without changing the color component of the visible light under the control of the control unit. The light source unit is
A white light source that outputs white light;
A color wheel that rotates under the control of the control unit and converts the white light into the visible light;
With
The color wheel includes a plurality of band pass filter groups that transmit light corresponding to each color component of the visible light,
The lighting device according to claim 1, wherein at least one of the plurality of bandpass filter groups includes a plurality of bandpass filters having the same color component of transmitted light and different spectral distributions of the transmitted light. The light source unit includes a plurality of light source groups that output light corresponding to each color component of the visible light,
The lighting device according to claim 1, wherein at least one of the plurality of light source groups includes a plurality of light sources that output light having the same color component and different spectral distributions. The illumination device according to claim 1, wherein the light source unit includes a wavelength programmable light source in which a spectral distribution characteristic of output light is controlled by controlling a built-in digital micromirror device. A light source unit that outputs visible light having different color components every time; a display element unit that modulates and outputs the visible light in units of pixels; and a control unit that controls the light source unit and the display element unit. A lighting method for illuminating an object using a lighting device,
The said control part controls the said light source part, The spectral distribution of the said visible light is varied without varying the color component of the said visible light, The illumination method characterized by the above-mentioned. The control unit emits a white light source included in the light source unit and rotates a color wheel included in the light source unit, and the white light of the white light source is a bandpass filter included in the color wheel, and the color of transmitted light. The illumination method according to claim 5, wherein the white light is converted into the visible light by sequentially applying to a plurality of band pass filters having the same components and different spectral distributions of the transmitted light. The illumination method according to claim 5, wherein the control unit is a light source included in the light source unit, and sequentially emits a plurality of light sources that output light having the same color component but different spectral distributions.

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