JP2017142441A - Lighting device and storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of making discomfort of light hard to be generated when light is projected onto an irradiated body.SOLUTION: A lighting device 1 for projecting light onto an irradiated body 5 includes: a light source 12; an image element 13 that has a plurality of pixels arranged two-dimensionally and outputs outgoing light based on a state of the plurality of pixels when light is injected from the light source 12; and a controller 11 for defocusing a lattice-like shadow pattern sp that appears on the irradiated body 5 caused by a non-transmission section that is a region among the plurality of pixels to switch between a first mode m1 for projecting light supplied from the light source 12 onto the irradiated body 5 and a second mode m2 for projecting the outgoing light onto the irradiated body 5.SELECTED DRAWING: Figure 5A

Description

  The present invention relates to an illumination device that projects light onto an object to be irradiated, and a storage device used in the illumination device.

  Conventionally, projectors that project various images onto an irradiated object such as a screen have been widely used.

  As one of this type of projector, Patent Document 1 discloses an autofocus projector that automatically adjusts the focus and outputs the pixel state of an image element included in the projector to an irradiated body. Since this projector automatically adjusts the focus, a clear image is displayed on the irradiated object.

JP-A-4-338706

  However, in the projector disclosed in Patent Document 1, since the focused object is automatically focused, a grid-like shadow pattern caused by a non-transmissive portion (black matrix) existing between pixels of the image element. Will be projected on the irradiated object at the same time. Therefore, when the light projected from the projector is used as illumination light (illumination light) instead of image light (image light), there is a problem that a sense of incongruity different from normal illumination light occurs. For example, when a character printed on an irradiated object is read by applying illumination light, light including a grid-like shadow pattern is projected from the projector, and thus there is a problem that the printed character is difficult to read.

  Therefore, the present invention provides an illumination device and the like that can make it difficult to cause a sense of incongruity when projecting light onto an irradiated object.

  One aspect of the lighting device of the present invention is a lighting device that projects light onto an object to be irradiated. The lighting device includes a light source and a plurality of pixels arranged in a two-dimensional shape, and light is incident from the light source. Blur the grid-like shadow pattern that appears on the irradiated object due to the image element that outputs the emitted light based on the state of the plurality of pixels and the non-transmissive portion that is the region between the plurality of pixels, or A first mode in which light supplied from the light source is projected onto the irradiated body and a second mode in which the emitted light is projected onto the irradiated body so that the shadow pattern caused by the video element does not appear. And a control unit for switching between.

  An aspect of the storage device of the present invention is a storage device that stores first content for projecting illumination light and second content for projecting video light, the first content and the 13. The second mode is characterized in that the illumination light and the video light projected by the first content and the second content are the first mode and the first in the illumination device according to claim 1. Each has mode identification information indicating which of the two modes should be projected.

  It is possible to make it difficult to produce a sense of incongruity when light is projected onto the irradiated object.

It is a figure explaining the subject of the conventional illuminating device, (a) is a surface image of the to-be-irradiated body in the state where the illumination light is not projected, (b) is the object in the state where the illumination light is projected. It is a surface image of an irradiation body. It is a figure which shows an example of the external appearance of the illuminating device which concerns on Embodiment 1. FIG. FIG. 3 is a block diagram showing a control configuration of the lighting apparatus according to Embodiment 1. FIG. 3 is a schematic diagram showing a projector of the illumination device according to Embodiment 1. It is a figure which shows the case where light is projected to a to-be-irradiated body in 1st mode using the illuminating device which concerns on Embodiment 1. FIG. It is a figure which shows the case where light is projected to a to-be-irradiated body in 2nd mode using the illuminating device which concerns on Embodiment 1. FIG. 6 is a flowchart illustrating a case where the lighting apparatus according to Embodiment 1 switches from a second mode to a first mode. 6 is a flowchart illustrating a case where the lighting apparatus according to Embodiment 1 switches from a first mode to a second mode. It is the schematic which shows the projector of the illuminating device which concerns on Embodiment 2. FIG. FIG. 6 is a block diagram showing a control configuration of a lighting apparatus according to Embodiment 2. It is the schematic which shows the projector of the illuminating device in the modification of Embodiment 2. FIG. FIG. 10 is a schematic diagram showing a projector of the illumination device according to Embodiment 3. FIG. 10 is a block diagram illustrating a control configuration of a lighting apparatus according to Embodiment 3.

  Hereinafter, an illumination device and a storage device according to embodiments will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment 1)
The illumination device according to the present embodiment is a device (lighting projector) that projects illumination light and video light onto an irradiated object such as a screen or a wall. Illumination light is used, for example, when illuminating a picture or character drawn on a screen, when illuminating a shaped object such as a vase and its background, or when producing a background image such as a sunbeams on a wall. The illumination light is not limited to white light but may be colored light, or may not be limited to a still image but may be a moving image. The video light is used, for example, when a moving image or a still image is displayed on a screen and provided to a viewer, that is, when the video content itself is viewed.

  First, the problem of the conventional lighting device will be described.

  The lighting device includes an image element for projecting an image. This video element has a plurality of pixels arranged two-dimensionally and a lattice-shaped non-transmissive portion (black matrix) that is an area between the plurality of pixels. Therefore, the illumination light emitted through the image element includes a grid-like shadow pattern caused by the non-transmissive portion. And the illumination light of the state in which the shadow pattern was contained is projected on a to-be-irradiated body.

  (A) of FIG. 1 is a surface image of the irradiated object 5 in a state where illumination light is not projected from the illumination device, and (b) is an irradiated object 5 in a state where illumination light is projected from the illumination device. It is a surface image.

  As shown in FIG. 1 (a), when the illumination light is not projected, the image as a whole becomes dark, but the character “ABC” printed on the irradiated object 5 has a special sense of incongruity. Does not occur. On the other hand, in FIG. 1B, the illumination light is projected through the image element, so that the shadow pattern sp is projected on the irradiated object 5 and the characters “ABC” printed on the irradiated object 5. It makes you feel uncomfortable with reading.

  Therefore, there is a demand for an illumination device that can make it difficult to cause a sense of incongruity when projecting light onto the irradiated object 5.

<Configuration of lighting device>
Hereinafter, the illumination device 1 according to the present embodiment will be described. FIG. 2 is a diagram illustrating an example of the appearance of the lighting device 1.

  As illustrated in FIG. 2, the illumination device 1 includes a device body 2 and a projector 3 that emits light. In this Embodiment, the apparatus main body 2 is being fixed to the ceiling which is a construction material of a building. The projector 3 is attached to the lower side of the apparatus main body 2 via a support column 4. The light emitted from the projector 3 is projected onto the irradiated object 5 fixed at a position away from the projector 3.

  FIG. 3 is a block diagram illustrating a control configuration of the lighting device 1. When the illumination device 1 is viewed from the viewpoint of a control configuration, the illumination device 1 includes a control unit 11, a storage unit 16, a light source 12, an image element 13, a focus adjustment unit 14, and a projection lens 15. The control unit 11 and the storage unit 16 are built in the apparatus main body 2 described above, and the light source 12, the image element 13, the focus adjustment unit 14, and the projection lens 15 are built in the projector 3 described above.

  Hereinafter, each component of the illuminating device 1 is demonstrated.

  The light source 12 is a portion that supplies white light, and includes a light emitting component and an optical system component. As the light emitting component, for example, a discharge lamp, or a solid light emitting element such as a light emitting diode, a semiconductor laser, an organic EL (Electro Luminescence), or an inorganic EL is used. Optical system parts are single-plate optical systems used in projectors, etc., such as various lenses (collimator lenses, integrator lenses and condenser lenses), various mirrors (reflection mirrors and dichroic mirrors), and parts such as polarization beam splitters Is included.

  The image element 13 has a plurality of pixels arranged two-dimensionally, and outputs light emitted based on the states of a plurality of images when light is incident from the light source 12. In the present embodiment, the image element 13 is a transmissive liquid crystal panel or an image display device of DLP (Trademark of Texas Instruments: Digital Light Processing) using a DMD (Digital Micromirror Device). By controlling the pixel state of the video element 13 by the control unit 11, for example, white light, colored light, or a color moving image is output from the video element 13. Further, as described above, the video element 13 has a lattice-shaped non-transmissive portion that is a region between a plurality of pixels. For this reason, the light emitted through the image element includes a lattice-like shadow pattern sp.

  As shown in FIG. 4, the projection lens 15 is a lens for projecting light onto the irradiated object 5. The light supplied from the light source 12 is projected onto the irradiated object 5 through the reversing mirror 17 and the image element 13 and further through the projection lens 15.

  The focus adjustment unit 14 is a part that adjusts the focus of light projected on the irradiated object 5. The focus adjustment is executed by moving the projection lens 15 in the optical axis direction using, for example, an ultrasonic motor. A clear image can be formed on the irradiated object 5 by adjusting the focus position to the irradiated object 5. Further, a blurred image can be formed on the irradiated object 5 by shifting the focus position of the light projected onto the irradiated object 5 in the optical axis direction. Whether to focus or shift the focus is selected by a command from the control unit 11.

  The control unit 11 is configured by a CPU (central processing unit) or the like. The control unit 11 controls the light projected onto the irradiated object 5 by controlling the pixel state of the video element 13 and controlling the focus using the focus adjustment unit 14.

  The control unit 11 in the present embodiment has a first mode m1 and a second mode m2. The first mode m1 is a mode in which the shadow pattern sp that appears due to the non-transmission part of the image element 13 is projected onto the irradiated object 5 in a blurred state. The second mode m2 is a mode in which the projection pattern 5 is projected onto the irradiated object 5 while the shadow pattern sp is still formed. The first mode m1 may be used as a mode for projecting illumination light onto the irradiated object 5. The second mode m2 may be used as a mode for projecting image light onto the irradiated object 5.

  FIG. 5A is a diagram illustrating a case where light (illumination light 6) is projected onto the irradiation object 5 in the first mode m1. FIG. 5A is a diagram in which a part of the projection area 8 is enlarged and imaged, and FIG. 5B is a diagram showing a difference in luminance on the AA line in FIG.

  In the first mode m1, since the shadow pattern sp is displayed in a blurred manner, as shown in FIG. 5A, the grid-like shadow pattern sp is displayed thin and thick. Further, as shown in FIG. 5A (b), the difference between the luminance of the shadow pattern sp and the luminance of a bright region other than the shadow pattern sp is small, and the contrast is small. Therefore, when light is projected onto the irradiated object 5 in the first mode m1, it is difficult for the user to feel uncomfortable with the light.

  FIG. 5B is a diagram illustrating a case where light (image light 7) is projected onto the irradiation object 5 in the second mode m2. FIG. 5B is a diagram in which a part of the projection region 8 is enlarged and imaged, and FIG. 5B is a diagram showing a difference in luminance on the BB line in FIG.

  In the second mode m2, the shadow pattern sp is displayed without blurring, so that the grid-like shadow pattern sp is displayed dark and thin as shown in FIG. Further, as shown in FIG. 5B (b), the difference between the luminance of the shadow pattern sp and the luminance of a bright region other than the shadow pattern sp is large, and the contrast is increased. Therefore, when light is projected onto the irradiation object 5 in the second mode m2, the difference between the states of the plurality of pixels becomes clear, and a clear image can be obtained.

  Then, the control unit 11 controls to project light by switching between the first mode m1 in which the shadow pattern sp is blurred and displayed and the second mode m2 in which the shadow pattern sp is displayed as it is. Thereby, in the illuminating device 1, light can be projected on the to-be-irradiated body 5 by selecting either the state in which the uncomfortable feeling of light hardly occurs or the state in which a clear image is obtained.

  The storage unit 16 includes a RAM (Random Access Memory) and a ROM (read only memory). The storage unit 16 stores a plurality of contents for projecting light (illumination light 6 or video light 7) onto the irradiated object 5.

  Here, among the plurality of contents, the contents corresponding to the first mode m1 of the control unit 11 and to be projected so as not to cause a sense of incongruity of light are referred to as first contents c1. The content corresponding to the second mode m2 and to be projected so as to obtain a clear image is referred to as second content c2. The first content c1 is projected as, for example, illumination light 6 and is projected on the irradiated object 5 in a state where the focus is actively blurred. The second content c2 is projected as, for example, video light 7, and is projected on the irradiated object 5 in a focused state.

  The first content c1 and the second content c2 are mode identification information i1 and i2 that indicate in which mode the light to be projected should be projected in the first mode m1 or the second mode m2 of the control unit 11. Respectively. The mode identification information i1 and i2 may be a flag indicating switching between the first content c1 and the second content c2. Further, the mode identification information i1, i2 is stored in the management table in association with operation information different from the mode identification information i1, i2, and the first content c1 and the first content c1 are substantially stored on the basis of the operation information. The two contents c2 may be identified.

  The control unit 11 includes a mode determination unit md that identifies whether light should be projected in the first mode m1 or light in the second mode m2, from the mode identification information i1 and i2 in the storage unit 16. ing. Thereby, the projection matched with content c1 and c2 can be switched exactly.

  Further, the storage unit 16 stores a blur setting value gv that determines the degree of focus blur in the first mode m1. The blur setting value gv is expressed by, for example, the size of the focus area, the position in the optical axis direction, or the position of the projection lens 15 in the optical axis direction. The blur setting value gv is set in advance to a value such that the shadow pattern sp is not visually recognized on the irradiated object 5. If the blur setting value gv is not set in the storage unit 16, blurring is performed by adjusting the focus area of the light projected onto the irradiated object 5 to the maximum or minimum focus adjustment range. May be.

  In addition, although the memory | storage part 16 showed the example incorporated in the apparatus main body 2 in the illuminating device 1, it is not restricted to it, The memory | storage part 16 may be comprised as a memory | storage device by an external hard disk. The storage unit 16 may be constructed by a cloud.

<Operation of lighting device>
Here, operation | movement of the illuminating device 1 in the case of switching 1st mode m1 and 2nd mode m2 is demonstrated.

  First, the case of switching from the second mode m2 to the first mode m1 will be described with reference to the flowchart shown in FIG. 6A.

  First, the illumination device 1 is in a state of projecting light onto the irradiated object 5 in the second mode m2 (S11).

  Next, the mode determination unit md of the control unit 11 detects the mode identification information i1 that triggers the mode switching from the storage unit 16 (S12). By detecting the mode identification information i1, the control unit 11 is ready to switch the light to be projected from the second mode m2 to the first mode m1.

  In preparation for switching to the first mode m1, the control unit 11 uses the focus adjustment unit 14 to perform focus adjustment so as to blur the focus of light projected on the irradiated object 5 (S13). As a result, the shadow pattern sp is blurred.

  Note that the shading of the shadow pattern sp may be performed by moving the focus position away, that is, by positioning the focus position on the opposite side of the image element 13 with respect to the irradiated object 5. . When the focus position is moved away and blurred, for example, the vase placed in front of the irradiated object 5 is not focused, and it is possible to make it difficult for the light to feel strange.

  Then, after the focus adjustment is completed, light is projected onto the irradiated object 5 in the first mode m1 using the first content c1 (S14). Thereby, the switching from the second mode m2 to the first mode m1 is completed.

  According to this, since the focus is not blurred after entering the first mode m1, but before the first mode m1 is entered, it is difficult for the light to feel uncomfortable immediately after switching to the first mode m1.

  Note that the blurring amount (blur setting value gv) in the case of performing the focus adjustment in step S13 may be set in advance to a value such that the shadow pattern sp is not visually recognized on the irradiated object 5. Further, blurring may be performed by adjusting the focus area of the light projected onto the irradiated object 5 to the maximum or minimum focus adjustment range.

  Next, the case of switching from the first mode m1 to the second mode m2 will be described with reference to the flowchart shown in FIG. 6B.

  First, the illumination device 1 is in a state of projecting light onto the irradiated object 5 in the first mode m1 (S21).

  Next, the mode determination unit md of the control unit 11 detects the mode identification information i2 that triggers the mode switching from the storage unit 16 (S22). By detecting the mode identification information i2, the control unit 11 is ready to switch the light to be projected from the first mode m1 to the second mode m2.

  In preparation for switching to the second mode m2, the control unit 11 uses the focus adjustment unit 14 to adjust the focus so that the light projected onto the irradiated object 5 is focused (S23). Thereby, the shadow pattern sp is displayed as it is.

  Then, after the focus adjustment is completed, light is projected onto the irradiated object 5 in the second mode m2 using the second content c2 (S24). Thereby, the switching from the first mode m1 to the second mode m2 ends.

  According to this, since the focus is not set after the second mode m2 is reached but before the second mode m2 is set, a clear image can be obtained from the time when the mode is switched to the second mode m2.

<Effects>
The illuminating device 1 according to the present embodiment is a illuminating device 1 that projects light onto an irradiated object 5, and includes a light source 12 and a plurality of pixels arranged in a two-dimensional manner. The image-shaped element 13 that outputs outgoing light based on the state of a plurality of pixels when incident, and the non-transmission portion that is an area between the plurality of pixels causes blurring of the grid-like shadow pattern sp that appears on the irradiated object 5 And a control unit 11 that switches between a first mode m1 for projecting light supplied from the light source 12 onto the irradiated object 5 and a second mode m2 for projecting emitted light onto the irradiated object 5.

  According to this configuration, when light is projected onto the irradiated object 5 using the illumination device 1, the first mode m1 for projecting the shadow pattern sp with blurring, and the second mode for projecting while the shadow pattern sp is formed. The mode m2 can be switched and projected. That is, the illuminating device 1 has not only a mode in which a clear image is obtained as in the prior art, but also a mode (first mode m1) in which light is actively blurred and projected. And since the illuminating device 1 can switch and project these modes m1 and m2, it can make it hard to produce the sense of incongruity of the light projected on the to-be-irradiated body 5. FIG.

  In addition, the first mode m1 may be a mode in which the illumination light 6 is projected onto the irradiated body 5, and the second mode m2 may be a mode in which the image light 7 is projected onto the irradiated body 5.

  According to this, when the illumination light 6 is irradiated, the uncomfortable feeling of the light is reduced, and when the image light 7 is irradiated, a clear image can be obtained.

  Further, the contrast of the shadow pattern sp may be smaller in the first mode m1 than in the second mode m2.

  According to this, light is projected onto the irradiated object 5 by selecting either the first mode m1 in which the contrast is small and the light does not feel strange or the second mode m2 in which the contrast is large and a clear image is obtained. be able to.

  In addition, the control unit 11 may perform the blurring of the shadow pattern sp in the first mode m1 by shifting the focus position of the light projected on the irradiated object 5 in the optical axis direction.

  According to this, the focus of the light projected on the irradiated object 5 can be easily changed, and the first mode m1 and the second mode m2 can be easily switched.

  In addition, the control unit 11 blurs the shadow pattern sp in the first mode m <b> 1 by positioning the focus position of the light projected onto the irradiated object 5 on the opposite side of the image element 13 with respect to the irradiated object 5. May be performed.

  According to this, the modeled object placed in front of the irradiated body 5 (the side on which the image element 13 is positioned with respect to the irradiated body 5) is not focused, and it is difficult to cause a sense of incongruity of light. be able to.

  Further, the control unit 11 may blur the shadow pattern sp in the first mode m1 by adjusting the focus area of the light projected on the irradiation object 5 to the maximum or minimum of the focus adjustment range.

  According to this, the focus of the light projected on the irradiated object 5 can be easily changed, and the first mode m1 and the second mode m2 can be easily switched.

  Further, the control unit 11 may perform the blurring of the shadow pattern sp in the first mode m1 based on the blur setting value gv set in advance so that the shadow pattern sp is not visually recognized by the irradiated object 5.

  According to this, it is possible to appropriately blur the light projected on the irradiated object 5 with high reproducibility.

  Further, when switching from the second mode m2 to the first mode m1, the control unit 11 may blur the shadow pattern sp before projecting in the first mode m1.

  According to this, since the focus is not blurred after entering the first mode m1, but before the first mode m1 is entered, it is difficult for the light to feel uncomfortable immediately after switching to the first mode m1.

  The illumination device 1 further includes a storage unit 16 that stores a plurality of contents related to the illumination light 6 and the video light 7, and the plurality of contents include the illumination light 6 and the video light 7 projected based on the content. The mode identification information i1 and i2 indicating which of the first mode m1 and the second mode m2 should be projected may be included. And the control part 11 may be comprised so that 1st mode m1 or 2nd mode m2 may be switched based on mode identification information i1 and i2, when the illumination light 6 and the image light 7 are projected.

  According to this, based on the mode identification information i1 and i2 of the storage unit 16, the first mode m1 in which the shadow pattern sp is blurred and the illumination light 6 is projected and the image light 7 is generated while the shadow pattern sp is formed. The second mode m2 to be projected can be switched and projected. Thereby, the uncomfortable feeling of the illumination light 6 projected on the irradiated body 5 can be reduced, and a clear image can be obtained in the video light 7.

  The storage device according to the present embodiment stores the first content c1 for projecting the illumination light 6 and the second content c2 for projecting the video light 7, and the first content c1 and the second content c2 are stored. The content c2 is a mode indicating which of the first mode m1 and the second mode m2 the illumination light 6 and the video light 7 projected by the first content c1 and the second content c2 should be projected. It has identification information i1 and i2, respectively.

  According to this, based on the mode identification information i1 and i2 of the first content c1 and the second content c2 that the storage device has, the first mode m1 that projects the illumination light 6 while blurring the shadow pattern sp, and the shadow pattern sp Can be projected with the second mode m2 in which the image light 7 is projected. Thereby, the uncomfortable feeling of the illumination light 6 projected on the irradiated body 5 can be reduced, and a clear image can be obtained in the video light 7.

(Embodiment 2)
FIG. 7 is a diagram showing a projector 3A of the illumination device 1A according to the second embodiment. FIG. 8 is a block diagram showing a control configuration of the lighting apparatus 1A.

  In the illuminating device 1A, when light is projected in the first mode m1, the light supplied from the light source 12 is projected without going through the video element 13. Thereby, the grid-like shadow pattern sp is not included.

  Specifically, the lighting device 1 </ b> A includes an optical path changing unit 27 that changes the optical path of light supplied from the light source 12. The optical path changing unit 27 includes a first dimming mirror 27a, a second dimming mirror 27d, and two reversing mirrors 27b and 27c. The dimming mirrors 27a and 27d are mirrors that can be switched between a reflection state and a transmission state by applying different voltages. In the present embodiment, the light is inverted by 90 ° in the reflection state and is in the transmission state. It arrange | positions so that light may permeate | transmit. The control unit 11 controls the voltage applied to the light control mirrors 27a and 27d. The reversing mirrors 27b and 27c are mirrors that rotate the light path by 90 °.

  As shown in FIG. 7A, the first optical path 21 that bypasses the image element 13 by setting the first dimming mirror 27a to the transmission state and the second dimming mirror 27d to the reflection state. Is formed. When the first optical path 21 is used, light can be projected without going through the image element 13. Therefore, when light is projected in the first mode m1, light that does not have the shadow pattern sp can be projected through the first optical path 21. Thereby, it is possible to make it difficult for the light to feel uncomfortable when the light is projected onto the irradiated object 5 in the first mode m1.

  As shown in FIG. 7B, the second light path 22 that passes through the image element 13 is obtained by setting the first dimming mirror 27a in the reflecting state and the second dimming mirror 27d in the transmitting state. Is formed. By using the second optical path 22, light can be projected through the video element 13. Therefore, when light is projected in the second mode m2, the light in the state in which the shadow pattern sp is formed can be projected through the second optical path 22. Thereby, the image at the time of irradiating the to-be-irradiated body 5 with light in 2nd mode m2 can be made clear.

  An illuminating device 1A according to the present embodiment is an illuminating device 1A that projects light onto an object to be irradiated 5. The illuminating device 1A includes a light source 12 and a plurality of pixels arranged two-dimensionally. The light source 12 emits light supplied from the light source 12 so as not to include the image element 13 that outputs emitted light based on the state of a plurality of pixels and the shadow pattern sp caused by the image element 13 when incident. And a control unit 11 that switches between a first mode m1 for projecting and a second mode m2 for projecting emitted light based on the state of the pixels of the image element onto the irradiated object 5.

  According to this configuration, when light is projected onto the irradiated object 5 using the lighting device 1A, the projection is performed in the state in which the first mode m1 is projected without forming the shadow pattern sp and the shadow pattern sp is formed. The second mode m2 to be switched can be projected. That is, the lighting device 1A has not only a mode in which a clear image is obtained as in the conventional technique, but also a mode (first mode m1) in which light is projected so as not to include the shadow pattern sp. And since 1 A of illuminating devices can switch and project these modes m1 and m2, it can make it hard to produce the sense of incongruity of the light projected on the to-be-irradiated body 5. FIG.

  Further, the control unit 11 may project the light supplied from the light source 12 without passing through the image element 13 onto the irradiated object 5 so that the shadow pattern sp is not included in the first mode m1.

  According to this, it is possible to project light without forming the shadow pattern sp caused by the non-transmission part of the image element 13 in the first mode m1. In addition, since light loss due to the image element does not occur, light utilization efficiency can be improved.

  The illumination device 1 </ b> A may further include an optical path changing unit 27 that changes the optical path of the light supplied from the light source 12. Then, the control unit 11 may bypass the optical path from the image element 13 using the optical path changing unit 27.

  According to this, light can be projected without forming the shadow pattern sp caused by the non-transmission part of the image element 13. In addition, since light loss due to the image element does not occur, light utilization efficiency can be improved. In addition, since the first mode m1 and the second mode m2 are switched while the position of the video element 13 is fixed, a stable image can be output in the second mode m2.

  FIG. 9 is a diagram showing a projector 3B of the illumination device 1B according to a modification of the second embodiment.

  In the projector 3B of the illumination device 1B according to the modification, movable reflection mirrors 27e and 27f are movably attached instead of the light control mirrors 27a and 27b.

  The optical path changing unit 27 includes two movable reflecting mirrors 27e and 27f and two reversing mirrors 27b and 27c. The movable reflecting mirrors 27e and 27f are configured to be rotated by an actuator (not shown). The rotation control of the movable reflecting mirrors 27e and 27f is performed by the control unit 11.

  As shown in FIG. 9A, the movable reflection mirror 27e is rotated 45 ° to be removed from the optical path, and the light supplied from the light source 12 is redirected using the reflection mirrors 27b and 27c and the movable reflection mirror 27f. Thus, the first optical path 21 that bypasses the image element 13 is formed. When the first optical path 21 is used, light can be projected without going through the image element 13. Therefore, when light is projected in the first mode m1, light that does not have the shadow pattern sp can be projected through the first optical path 21.

  As shown in FIG. 9B, the movable reflecting mirror 27f is rotated 45 ° to be removed from the optical path. Then, the light supplied from the light source 12 is reflected by the movable reflecting mirror 27e, whereby the second optical path 22 that passes through the video device 13 is formed. By using the second optical path 22, light can be projected through the video element 13. Therefore, when light is projected in the second mode m2, the light in the state in which the shadow pattern sp is formed can be projected through the second optical path 22.

  Also in the illumination device 1B in this modification, it is possible to project light without forming the shadow pattern sp caused by the non-transmission part of the image element 13. In addition, since light loss due to the image element does not occur, light utilization efficiency can be improved. In addition, since the first mode m1 and the second mode m2 are switched while the position of the video element 13 is fixed, a stable image can be output in the second mode m2.

(Embodiment 3)
FIG. 10 is a diagram illustrating a projector 3C of the illumination device 1C according to the third embodiment. FIG. 11 is a block diagram illustrating a control configuration of the lighting apparatus 1C.

  Even in the illuminating device 1C, when light is projected in the first mode m1, light supplied from the light source 12 is projected without going through the video element 13. Thereby, the grid-like shadow pattern sp is not included.

  Specifically, the lighting device 1 </ b> C includes an element moving unit 37 connected to the video element 13. The element moving unit 37 is, for example, a linear motion motor or a piezoelectric actuator. The image element 13 can be moved to a region outside the optical path 31 by moving the image element 13 perpendicularly to the optical axis direction using the element moving unit 37. The operation of the element moving unit 37 is controlled by the control unit 11.

  As shown in FIG. 10A, by moving the image element 13 out of the optical path 31 using the element moving unit 37, light can be projected without passing through the image element 13. Therefore, when projecting light in the first mode m1, it is possible to project light having no shadow pattern sp by moving the image element 13 out of the optical path 31. Thereby, it is possible to make it difficult for the light to feel uncomfortable when the light is projected onto the irradiated object 5 in the first mode m1.

  As illustrated in FIG. 10B, the light that has passed through the image element 13 can be projected by moving the image element 13 into the optical path 31. Therefore, when projecting light in the second mode m2, it is possible to emit light based on the state of the pixels of the video element by moving the video element 13 into the optical path 31. Thereby, the image at the time of irradiating the to-be-irradiated body 5 with light in 2nd mode m2 can be made clear.

  In the illumination device 1C according to the present embodiment, when light is projected onto the irradiated object 5 using the illumination device 1C, the first mode m1 that projects so as not to include the shadow pattern sp, and the shadow pattern sp The second mode m2 projected in the formed state can be switched and projected. Thereby, it is possible to make it difficult to cause a sense of incongruity of the light projected on the irradiated object 5.

  The lighting device 1 </ b> C may further include an element moving unit 37 that moves the image element 13. Then, the control unit 11 may move the image element 13 out of the optical path 31 of the light supplied from the light source 12 using the element moving unit 37.

  According to this, light can be projected without forming the shadow pattern sp caused by the non-transmission part of the image element 13. In addition, since light loss due to the image element does not occur, light utilization efficiency can be improved. Further, since the first mode m1 and the second mode m2 are switched without changing the optical path 31 of the light supplied from the light source 12, the position of the projection region 8 can be stabilized.

(Other)
The lighting device has been described above based on the embodiment, but the present invention is not limited to the above embodiment. For example, it is realized by arbitrarily combining the components and functions in the embodiments that are obtained by making various modifications conceived by those skilled in the art to the above-described embodiments, and without departing from the spirit of the present invention. Forms are also included in the present invention.

  For example, the shading of the shadow pattern sp may be realized by slightly vibrating the projection lens 15 or the image element 13 in the direction perpendicular to the optical axis.

  Further, the illumination device 1, 1 </ b> A, 1 </ b> B, or 1 </ b> C may include an ultrasonic transmission / reception element, measure the distance from the irradiated object 5 using the ultrasonic transmission / reception element, and adjust the focus.

  Moreover, in Embodiment 1, although the illuminating device 1 is installed in the ceiling, it is not restricted to it, You may install in a floor surface, a desk, etc.

  In the first, second, and third embodiments, a transmissive liquid crystal panel is used as the video element 13. However, the present invention is not limited to this, and a reflective liquid crystal panel can also be used. The image element 13 may be an image element having a non-transmissive portion (black matrix).

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C Illumination device 5 Object to be irradiated 6 Illumination light 7 Video light 11 Control unit 12 Light source 13 Video element 14 Focus adjustment unit 15 Projection lens 16 Storage unit (storage device)
27 optical path changing unit 37 element moving unit c1 first content c2 second content gv blurring setting value i1, i2 mode identification information m1 first mode m2 second mode md mode discriminating unit sp shadow pattern

Claims (13)

An illumination device that projects light onto an irradiated object,
A light source;
A plurality of pixels arranged two-dimensionally, and an image element that outputs emitted light based on the state of the plurality of pixels when light is incident from the light source;
The shadow pattern in the lattice pattern appearing on the irradiated object is blurred due to a non-transmission part that is an area between the plurality of pixels, or the shadow pattern due to the video element does not appear. An illuminating device comprising: a control unit that switches between a first mode in which light supplied from a light source is projected onto the irradiated body and a second mode in which the emitted light is projected onto the irradiated body. The lighting device according to claim 1, wherein the first mode is a mode in which illumination light is projected onto the irradiated body, and the second mode is a mode in which image light is projected onto the irradiated body. The illumination device according to claim 1, wherein the first mode has a smaller contrast of the shadow pattern than the second mode. The said control part performs the blur of the said shadow pattern in the said 1st mode by shifting the position of the focus of the light projected on the said to-be-irradiated body to an optical axis direction. Lighting equipment. The control unit blurs the shadow pattern in the first mode by positioning a focus position of light projected on the irradiated object on the opposite side of the image element with respect to the irradiated object. The lighting device according to claim 4. The said control part performs the blur of the said shadow pattern in the said 1st mode by adjusting the area of the focus of the light projected on the said to-be-irradiated object to the maximum or minimum of the said focus adjustment range. Lighting equipment. The said control part performs the blur of the said shadow pattern in the said 1st mode based on the blurring setting value preset so that the said shadow pattern is not visually recognized by the said to-be-irradiated body. The lighting device according to item 1. The lighting device according to any one of claims 4 to 7, wherein the control unit blurs the shadow pattern before projecting in the first mode when switching from the second mode to the first mode. . The control unit projects the light supplied from the light source onto the irradiated body without going through the video element so that the shadow pattern is not included in the first mode. The lighting device described in 1. further,
An optical path changing unit for changing an optical path of light supplied from the light source;
The lighting device according to claim 9, wherein the control unit causes the optical path to be detoured from the video device using the optical path changing unit. further,
An element moving unit for moving the image element;
The control unit moves the image element out of an optical path of light supplied from the light source using the element moving unit.
The lighting device according to claim 9. further,
A storage unit for storing a plurality of contents relating to illumination light and video light;
The plurality of contents include mode identification information indicating which mode of the first mode and the second mode the illumination light and the video light projected based on the content should be projected. Each has
The said control part switches the said 1st mode or the said 2nd mode based on the said mode identification information, when the said illumination light and the said image light are projected. Lighting device. A storage device that stores first content for projecting illumination light and second content for projecting video light,
The said 1st content and the said 2nd content are the said illumination light and the said image light which are projected by the said 1st content and the said 2nd content, The said lighting apparatus in any one of Claims 1-12 Each of the storage devices has mode identification information indicating which of the first mode and the second mode should be projected.