JP6931820B2 - Lighting device - Google Patents

Description

The present invention relates to lighting equipment for projecting light to the irradiated body.

Conventionally, projectors that project various images onto an irradiated object such as a screen have become widespread.

As one of these types of projectors, Patent Document 1 discloses an autofocus projector that automatically adjusts the focus and outputs the pixel state of the image element of the projector to the irradiated body. Since the focus is automatically adjusted by this projector, a clear image is projected on the irradiated object.

Japanese Unexamined Patent Publication No. 4-338706

However, in the projector disclosed in Patent Document 1, since the irradiated body is automatically focused, a grid-like shadow pattern caused by a non-transmissive portion (black matrix) existing between the pixels of the image element is used. Is also projected on the irradiated body at the same time. Therefore, when the light projected from this projector is used as illumination light (light for illumination) instead of image light (light for image), there is a problem that a feeling of strangeness different from normal illumination light occurs. For example, when the characters printed on the irradiated body are read by applying illumination light, the projector projects light including a grid-like shadow pattern, which causes a problem that the printed characters are difficult to read.

Therefore, the present invention provides an illuminating device or the like that can reduce the discomfort of light when projecting light onto an irradiated body.

One aspect of the lighting device of the present invention is a lighting device that projects light onto an irradiated body, and has a light source and a plurality of pixels arranged in a two-dimensional shape, and when light is incident from the light source. 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 blur the grid-like shadow pattern that appears on the irradiated object from the light source. The first mode includes a control unit that switches between a first mode in which the supplied light is projected onto the irradiated body and a second mode in which the emitted light is projected onto the irradiated body more clearly than in the first mode. 1 mode, the a mode for projecting an illumination light of the still image to the irradiated body, the second mode, the Ri Oh mode for projecting image light moving the irradiated body, the front Symbol controller, By shifting the focus position of the light projected on the irradiated body in the optical axis direction and locating the light on the opposite side of the image element with respect to the irradiated body, the shadow pattern in the first mode is blurred. gastric lines, further, wherein, when switching from said second mode to said first mode, the shading pattern of the videos that are projected by the second mode before projecting in the first mode Blur.
One aspect of the lighting device of the present invention is a lighting device that projects light onto an irradiated body, and has a light source and a plurality of pixels arranged in a two-dimensional shape, and when light is incident from the light source. 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 blur the grid-like shadow pattern that appears on the irradiated object from the light source. The first mode includes a control unit that switches between a first mode in which the supplied light is projected onto the irradiated body and a second mode in which the emitted light is projected onto the irradiated body more clearly than in the first mode. The first mode is a mode for projecting the illumination light of a still image on the irradiated body, the second mode is a mode for projecting a moving image light on the irradiated body, and the control unit is the subject. By shifting the focus position of the light projected on the irradiating body in the optical axis direction and locating the light on the opposite side of the image element with respect to the irradiated body, the shadow pattern in the first mode is blurred. Further, it has a storage unit for storing a plurality of contents related to the illumination light and the video light, and the plurality of contents are such that the illumination light and the video light projected based on the contents are the first mode. The control unit has mode identification information indicating which mode of the second mode and the second mode should be projected, and the control unit receives the mode identification information when the illumination light and the video light are projected. The first mode or the second mode is switched based on the above.

When projecting light onto the irradiated body, it is possible to reduce the feeling of discomfort in the light.

It is a figure explaining the problem of the conventional lighting apparatus, (a) is the surface image of the irradiated body in the state where the illumination light is not projected, (b) is the subject in the state which the illumination light is projected. It is a surface image of an irradiator. It is a figure which shows an example of the appearance of the lighting apparatus which concerns on Embodiment 1. FIG. It is a block diagram which shows the control structure of the lighting apparatus which concerns on Embodiment 1. FIG. It is the schematic which shows the projector of the lighting apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the case where the light is projected on the irradiated body in the 1st mode by using the lighting apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the case where the light is projected on the irradiated body in the 2nd mode by using the lighting apparatus which concerns on Embodiment 1. FIG. It is a flowchart which shows the case of switching from the 2nd mode to the 1st mode in the lighting apparatus which concerns on Embodiment 1. FIG. It is a flowchart which shows the case of switching from the 1st mode to the 2nd mode in the lighting apparatus which concerns on Embodiment 1. FIG. It is the schematic which shows the projector of the lighting apparatus which concerns on Embodiment 2. FIG. It is a block diagram which shows the control structure of the lighting apparatus which concerns on Embodiment 2. FIG. It is the schematic which shows the projector of the lighting apparatus in the modification of Embodiment 2. It is the schematic which shows the projector of the lighting apparatus which concerns on Embodiment 3. FIG. It is a block diagram which shows the control structure of the lighting apparatus which concerns on Embodiment 3. FIG.

Hereinafter, the lighting device and the storage device according to the embodiment will be described with reference to the drawings. It should be noted that all of the embodiments described below show a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions of the components, connection forms, and the like shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present invention will be described as arbitrary components.

It should be noted that each figure is a schematic view and is not necessarily exactly illustrated. Further, in each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description will be omitted or simplified.

(Embodiment 1)
The lighting device according to the present embodiment is a device (lighting projector) that projects illumination light and image light onto an illuminated object such as a screen or a wall. Illumination light is used, for example, to illuminate a picture or character drawn on a screen, to illuminate a modeled object such as a vase and its background, or to project a background image such as sunlight through a tree on a wall. The illumination light is not limited to white light and may be colored light, and may be not limited to still images but may be moving images. The video light is used, for example, when a moving image or a still image is projected on a screen and provided to a viewer, that is, when the video content itself is viewed.

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

The lighting device includes an image element for projecting an image. This image element has a plurality of pixels arranged in a two-dimensional manner and a grid-like non-transmissive portion (black matrix) which is a region 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. Then, the illuminated body is projected with the illumination light including the shadow pattern.

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

As shown in FIG. 1 (a), when the illumination light is not projected, the entire image becomes dark, but reading the character "ABC" printed on the irradiated body 5 gives a special feeling of strangeness. Does not occur. On the other hand, in FIG. 1B, the shadow pattern sp is projected on the irradiated body 5 by projecting the illumination light through the image element, and the characters “ABC” printed on the irradiated body 5 It makes me feel uncomfortable to read.

Therefore, there is a need for a lighting device or the like that can reduce the discomfort of light when projecting light onto the irradiated body 5.

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

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

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

Hereinafter, each component of the lighting device 1 will be described.

The light source 12 is a portion that supplies white light, and is composed of a light emitting component and an optical system component. As the light emitting component, for example, a discharge lamp or a solid-state light emitting element such as a light emitting diode, a semiconductor laser, an organic EL (Electroluminescence) or an inorganic EL is used. The optical system components are single-plate optical systems used in projectors and the like, and include various lenses (collimating lenses, integrator lenses and condenser lenses), various mirrors (reflection mirrors and dichroic mirrors), and polarizing beam splitters. Is included.

The image element 13 has a plurality of pixels arranged in a two-dimensional manner, and is an element that outputs emitted light based on each state of the 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 a DLP (Digital Light Processing) image display device using a DMD (Digital Micromirror Device). By controlling the pixel state of the image element 13 with the control unit 11, for example, white light, colored light, or color moving image is output from the image element 13. Further, as described above, the image element 13 has a grid-like non-transparent portion which is a region between a plurality of pixels. Therefore, the light emitted through the image element includes a grid-like shadow pattern sp.

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

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

The control unit 11 is composed of a CPU (central processing unit) and the like. The control unit 11 controls the pixel state of the image element 13, and also controls the focus by using the focus adjustment unit 14, thereby controlling the light projected on the irradiated body 5.

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-transmissive portion of the image element 13 is projected onto the irradiated body 5 in a blurred state. The second mode m2 is a mode in which the shadow pattern sp is projected onto the irradiated body 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 body 5. The second mode m2 may be used as a mode for projecting image light onto the irradiated body 5.

FIG. 5A is a diagram showing a case where light (illumination light 6) is projected onto the irradiated body 5 in the first mode m1. FIG. 5A is a diagram in which a part of the projection region 8 is enlarged and imaged, and FIG. 5A is a diagram showing a difference in brightness on the AA line of FIG. 5A.

In the first mode m1, since the shadow pattern sp is blurred and displayed, the grid-like shadow pattern sp is displayed lightly and thickly as shown in FIG. 5A (a). Further, as shown in FIG. 5A (b), the difference between the brightness of the shadow pattern sp and the brightness of the bright region other than the shadow pattern sp is small, and the contrast becomes small. Therefore, when light is projected onto the irradiated body 5 in the first mode m1, a sense of discomfort with respect to the light is less likely to occur.

FIG. 5B is a diagram showing a case where light (image light 7) is projected onto the irradiated body 5 in the second mode m2. FIG. 5B (a) is an enlarged image of a part of the projection region 8, and FIG. 5B is a diagram showing the difference in brightness on the BB line of (a).

In the second mode m2, the shadow pattern sp is displayed without blurring, so that the grid-like shadow pattern sp is displayed darkly and thinly as shown in FIG. 5B (a). Further, as shown in FIG. 5B (b), the difference between the brightness of the shadow pattern sp and the brightness of the bright region other than the shadow pattern sp is large, and the contrast becomes large. Therefore, when light is projected onto the irradiated body 5 in the second mode m2, the difference in the state of each 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. As a result, the lighting device 1 can project the light onto the irradiated body 5 by selecting either a state in which the discomfort of the light is unlikely to occur or a state in which a clear image can be obtained.

The storage unit 16 is composed of 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 image light 7) onto the irradiated body 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 discomfort in light are referred to as the first contents c1. Further, the content corresponding to the second mode m2 and to be projected so as to obtain a clear image is referred to as the second content c2. The first content c1 is projected as, for example, the illumination light 6, and is projected on the irradiated body 5 in a state where the focus is positively blurred. The second content c2 is projected as, for example, image light 7, and is projected onto the irradiated body 5 in a focused state.

The first content c1 and the second content c2 are mode identification information i1 and i2 indicating which mode of the first mode m1 or the second mode m2 of the control unit 11 should be projected for the projected light. Each has. The mode identification information i1 and i2 may be flags indicating switching between the first content c1 and the second content c2. Further, the mode identification information i1 and i2 are stored in the management table in association with the operation information different from the mode identification information i1 and i2, and based on the operation information, the first content c1 and the first content c1 and the first content are substantially used. 2 The content c2 may be distinguished from the content c2.

The control unit 11 has 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 of the storage unit 16. ing. As a result, the projection according to the contents c1 and c2 can be accurately switched.

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

Although the lighting device 1 shows an example in which the storage unit 16 is built in the device main body 2, the storage unit 16 may be configured as a storage device using an external hard disk. Further, the storage unit 16 may be constructed by the cloud.

<Operation of lighting device>
Here, the operation of the lighting device 1 when switching between the first mode m1 and the second mode m2 will be described.

First, a 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 lighting device 1 is in a state of projecting light onto the irradiated body 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). Upon detection of the mode identification information i1, the control unit 11 prepares to switch the projected light from the second mode m2 to the first mode m1.

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

The shading pattern sp may be blurred so that the focus position is far away, that is, the focus position is located on the opposite side of the image element 13 with respect to the irradiated body 5. .. When the focus position is moved away and blurred, for example, the vase placed in front of the irradiated body 5 is not in focus, and it is possible to reduce the feeling of discomfort in light.

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

According to this, instead of blurring the focus after the first mode m1, the focus is blurred before the first mode m1, so that the discomfort of the light immediately after switching to the first mode m1 is less likely to occur.

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

Next, a 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 lighting device 1 is in a state of projecting light onto the irradiated body 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). Upon detection of the mode identification information i2, the control unit 11 prepares to switch the projected light from the first mode m1 to the second mode m2.

The control unit 11 uses the focus adjustment unit 14 to adjust the focus so as to focus the light projected on the irradiated body 5 in preparation for switching to the second mode m2 (S23). As a result, the shadow pattern sp is displayed as it is.

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

According to this, instead of focusing after the second mode m2 is set, the focus is set before the second mode m2 is set, so that a clear image can be obtained from the time when the second mode m2 is switched to.

<Effects, etc.>
The lighting device 1 according to the present embodiment is a lighting device 1 that projects light onto an irradiated body 5, has a light source 12 and a plurality of pixels arranged in a two-dimensional shape, and light is emitted from the light source 12. The image element 13 that outputs the emitted light based on the state of the plurality of pixels when incident is incident, and the grid-like shadow pattern sp that appears in the irradiated body 5 due to the non-transmissive portion that is the region between the plurality of pixels is blurred. A control unit 11 for switching between a first mode m1 that projects the light supplied from the light source 12 onto the irradiated body 5 and a second mode m2 that projects the emitted light onto the irradiated body 5 is provided.

According to this configuration, when light is projected onto the irradiated body 5 using the illumination device 1, the first mode m1 for blurring and projecting the shadow pattern sp and the second mode m1 for projecting with the shadow pattern sp formed. It is possible to switch between the mode m2 and project. That is, the lighting device 1 has not only a mode in which a clear image can be obtained as in the prior art, but also a mode in which light is positively blurred and projected (first mode m1). Then, since the lighting device 1 can switch between these modes m1 and m2 for projection, it is possible to reduce the discomfort of the light projected on the irradiated body 5.

Further, the first mode m1 may be a mode for projecting the illumination light 6 on the irradiated body 5, and the second mode m2 may be a mode for projecting the image light 7 on the irradiated body 5.

According to this, when the illumination light 6 is irradiated, the discomfort 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, the light is projected onto the irradiated body 5 by selecting either the first mode m1 in which the contrast is small and the discomfort of the light is less likely to occur, or the second mode m2 in which the contrast is large and a clear image can be obtained. be able to.

Further, the control unit 11 may blur the shadow pattern sp in the first mode m1 by shifting the focus position of the light projected on the irradiated body 5 in the optical axis direction.

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

Further, the control unit 11 positions the focus position of the light projected on the irradiated body 5 on the opposite side of the image element 13 with respect to the irradiated body 5, thereby blurring the shadow pattern sp in the first mode m1. May be done.

According to this, the modeled object or the like placed in front of the irradiated body 5 (the side on which the image element 13 is located with respect to the irradiated body 5) is not focused, and the discomfort of light is less likely to occur. 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 irradiated body 5 to the maximum or minimum of the focus adjustment range.

According to this, the focus of the light projected on the irradiated body 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 blur 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 body 5.

According to this, it is possible to appropriately blur the light projected on the irradiated body 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, instead of blurring the focus after the first mode m1, the focus is blurred before the first mode m1, so that the discomfort of the light immediately after switching to the first mode m1 is less likely to occur.

Further, the lighting device 1 further has a storage unit 16 for storing a plurality of contents related to the illumination light 6 and the image light 7, and the plurality of contents include the illumination light 6 and the image light 7 projected based on the contents. , The mode identification information i1 and i2 indicating which mode of the first mode m1 and the second mode m2 should be projected may be provided. Then, the control unit 11 may be configured to switch between the first mode m1 and the second mode m2 based on the mode identification information i1 and i2 when the illumination light 6 and the video light 7 are projected.

According to this, the first mode m1 that blurs the shadow pattern sp and projects the illumination light 6 based on the mode identification information i1 and i2 possessed by the storage unit 16 and the image light 7 with the shadow pattern sp formed. It is possible to switch between the second mode m2 for projection and project. As a result, the discomfort of the illumination light 6 projected on the irradiated body 5 can be reduced, and a clear image can be obtained in the image light 7.

Further, 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 stores the first content c1 and the second content c1. 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, the first mode m1 that blurs the shadow pattern sp and projects the illumination light 6 based on the mode identification information i1 and i2 of the first content c1 and the second content c2 that the storage device has, and the shadow pattern sp. Can be projected with the second mode m2, which projects the image light 7 while the image light 7 is formed. As a result, the discomfort of the illumination light 6 projected on the irradiated body 5 can be reduced, and a clear image can be obtained in the image light 7.

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

In this lighting device 1A, when projecting light in the first mode m1, the light supplied from the light source 12 is projected without going through the image element 13. As a result, the grid-like shadow pattern sp is not included.

Specifically, the lighting device 1A has an optical path changing unit 27 that changes the optical path of the 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 switch 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 the light is inverted by 90 ° in the transmission state. It is arranged so as to transmit light. The control unit 11 controls the applied voltage of the dimming mirrors 27a and 27d. The reversing mirrors 27b and 27c are mirrors that rotate the path of light by 90 °.

As shown in FIG. 7A, the first optical path 21 bypassing the image element 13 by putting the first dimming mirror 27a in a transmissive state and the second dimming mirror 27d in a reflective state. Is formed. When the first optical path 21 is used, light can be projected without going 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 passing through the first optical path 21. As a result, it is possible to reduce the feeling of discomfort in the light when the light is projected onto the irradiated body 5 in the first mode m1.

As shown in FIG. 7B, by putting the first dimming mirror 27a in the reflective state and the second dimming mirror 27d in the transmissive state, the second optical path 22 passing through the image element 13 Is formed. By using the second optical path 22, light can be projected through the image element 13. Therefore, when the light is projected in the second mode m2, the light in the state where the shadow pattern sp is formed can be projected by passing through the second optical path 22. As a result, the image when the irradiated body 5 is irradiated with light in the second mode m2 can be made clear.

The illuminating device 1A according to the present embodiment is an illuminating device 1A that projects light onto the irradiated body 5, has a light source 12 and a plurality of pixels arranged in a two-dimensional manner, and the light is emitted from the light source 12. The illuminated body 5 receives the light supplied from the light source 12 so as not to include the image element 13 that outputs the emitted light based on the state of a plurality of pixels when incident and the shadow pattern sp caused by the image element 13. It is provided with a first mode m1 that projects light on the image element, and a control unit 11 that switches a second mode m2 that projects emitted light based on the state of pixels of the image element onto the irradiated body 5.

According to this configuration, when light is projected onto the irradiated body 5 using the illumination device 1A, the first mode m1 that projects without forming the shadow pattern sp and the projection with the shadow pattern sp formed. It is possible to switch between the second mode m2 and the projection. That is, the lighting device 1A has not only a mode in which a clear image can be obtained as in the prior art, but also a mode in which light is projected so that the shadow pattern sp is not included (first mode m1). Since the lighting device 1A can switch between these modes m1 and m2 for projection, it is possible to make it difficult for the light projected on the irradiated body 5 to feel uncomfortable.

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

According to this, in the first mode m1, light can be projected without forming the shadow pattern sp caused by the non-transmissive portion of the image element 13. Further, since the light loss due to the passage through the image element does not occur, the light utilization efficiency can be improved.

Further, the lighting device 1A 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 use the optical path changing unit 27 to bypass the optical path from the image element 13.

According to this, it is possible to project light without forming a shadow pattern sp caused by a non-transmissive portion of the image element 13. Further, since the light loss due to the passage through the image element does not occur, the light utilization efficiency can be improved. Further, since the first mode m1 and the second mode m2 are switched with the position of the image element 13 fixed, a stable image can be output in the second mode m2.

FIG. 9 is a diagram showing a projector 3B of the lighting device 1B in the modified example of the second embodiment.

In the projector 3B of the lighting device 1B in the modified example, movable reflection mirrors 27e and 27f are movably attached instead of the dimming mirrors 27a and 27d.

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

As shown in FIG. 9A, the movable reflection mirror 27e is rotated by 45 ° to remove it from the optical path, and the light supplied from the light source 12 is changed in direction by using the reversing mirrors 27b and 27c and the movable reflection mirror 27f. As a result, 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 projecting light in the first mode m1, it is possible to project light having no shadow pattern sp by passing through the first optical path 21.

As shown in FIG. 9B, the movable reflection mirror 27f is rotated by 45 ° to remove it from the optical path. Then, the light supplied from the light source 12 is reflected by the movable reflection mirror 27e to form a second optical path 22 passing through the image element 13. By using the second optical path 22, light can be projected through the image element 13. Therefore, when the light is projected in the second mode m2, the light in the state where the shadow pattern sp is formed can be projected by passing through the second optical path 22.

Even in the lighting device 1B in this modification, light can be projected without forming a shadow pattern sp caused by the non-transmissive portion of the image element 13. Further, since the light loss due to the passage through the image element does not occur, the light utilization efficiency can be improved. Further, since the first mode m1 and the second mode m2 are switched with the position of the image element 13 fixed, a stable image can be output in the second mode m2.

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

The lighting device 1C also projects the light supplied from the light source 12 without going through the image element 13 when projecting the light in the first mode m1. As a result, the grid-like shadow pattern sp is not included.

Specifically, the lighting device 1C has an element moving unit 37 connected to the image element 13. The element moving unit 37 is, for example, a linear motor or a piezoelectric actuator. By moving the image element 13 perpendicularly to the optical axis direction using the element moving unit 37, the image element 13 can be moved to a region outside the optical path 31. 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 going through the image element 13. Therefore, when projecting light in the first mode m1, by moving the image element 13 out of the optical path 31, it is possible to project light having no shadow pattern sp. As a result, it is possible to reduce the feeling of discomfort in the light when the light is projected onto the irradiated body 5 in the first mode m1.

As shown in FIG. 10B, by moving the image element 13 into the optical path 31, the light that has passed through the image element 13 can be projected. Therefore, when projecting light in the second mode m2, by moving the image element 13 into the optical path 31, it is possible to emit light based on the state of the pixels of the image element. As a result, the image when the irradiated body 5 is irradiated with light in the second mode m2 can be made clear.

In the illuminating device 1C according to the present embodiment, when the illuminating device 1C is used to project light onto the irradiated body 5, the first mode m1 that projects the light so as not to include the shadow pattern sp and the shadow pattern sp are It is possible to switch between the second mode m2 for projecting in the formed state and project. As a result, it is possible to reduce the discomfort of the light projected on the irradiated body 5.

Further, the lighting device 1C may further include an element moving unit 37 for moving the image element 13. Then, the control unit 11 may use the element moving unit 37 to move the image element 13 out of the optical path 31 of the light supplied from the light source 12.

According to this, it is possible to project light without forming a shadow pattern sp caused by a non-transmissive portion of the image element 13. Further, since the light loss due to the passage through the image element does not occur, the 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.

(others)
Although the lighting device has been described above based on the embodiment, the present invention is not limited to the above embodiment. For example, it is realized by arbitrarily combining the components and functions in the embodiment as long as it does not deviate from the gist of the present invention and the embodiment obtained by applying various modifications that a person skilled in the art can think of. Forms are also included in the present invention.

For example, the blurring 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 lighting devices 1, 1A, 1B, and 1C may have an ultrasonic transmission / reception element built-in, and the distance to the irradiated body 5 may be measured by using the ultrasonic wave transmission / reception element to adjust the focus.

Further, in the first embodiment, the lighting device 1 is installed on the ceiling, but the present invention is not limited to this, and the lighting device 1 may be installed on a floor surface, a desk, or the like.

Further, in the first, second, and third embodiments, the transmissive liquid crystal panel is used as the image element 13, but 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).

1, 1A, 1B, 1C Illumination device 5 Illuminated body 6 Illumination light 7 Image light 11 Control unit 12 Light source 13 Image element 14 Focus adjustment unit 15 Projection lens 16 Storage unit (storage device)
27 Optical path changing part 37 Element moving part c1 1st content c2 2nd content gv Blur setting value i1, i2 Mode identification information m1 1st mode m2 2nd mode md mode discriminator sp Shading pattern

Claims (4)

A lighting device that projects light onto an irradiated body.
Light source and
An image element having a plurality of pixels arranged in a two-dimensional manner and outputting emitted light based on the state of the plurality of pixels when light is incident from the light source.
A first mode in which the light supplied from the light source is projected onto the irradiated body by blurring the grid-like shadow pattern appearing on the irradiated body due to the non-transmissive portion that is the region between the plurality of pixels. It is provided with a control unit that switches between a second mode in which the emitted light is projected onto the irradiated body more clearly than in the first mode.
Wherein the first mode, the a mode for projecting an illumination light of the still image to the irradiated body, the second mode, the Ri Oh mode for projecting image light moving the irradiated body,
Prior Symbol controller, shifting the focus position of the light to be projected the the irradiated body in the optical axis direction, and, by positioning on the opposite side of the image sensor the irradiation object based, the first mode There line the blurring of the shadow pattern in,
Further, when switching from the second mode to the first mode, the control unit blurs the shadow pattern of the moving image projected in the second mode before projecting in the first mode. Device. A lighting device that projects light onto an irradiated body.
Light source and
An image element having a plurality of pixels arranged in a two-dimensional manner and outputting emitted light based on the state of the plurality of pixels when light is incident from the light source.
A first mode in which the light supplied from the light source is projected onto the irradiated body by blurring the grid-like shadow pattern appearing on the irradiated body due to the non-transmissive portion that is the region between the plurality of pixels. It is provided with a control unit that switches between a second mode in which the emitted light is projected onto the irradiated body more clearly than in the first mode.
Wherein the first mode, the a mode for projecting an illumination light of the still image to the irradiated body, the second mode, the Ri Oh mode for projecting image light moving the irradiated body,
Prior Symbol controller, shifting the focus position of the light to be projected the the irradiated body in the optical axis direction, and, by positioning on the opposite side of the image sensor the irradiation object based, the first mode Blurring the shadow pattern in
Moreover,
It has a storage unit that stores a plurality of contents related to the illumination light and the video light, and has a storage unit.
The plurality of contents provide mode identification information indicating in which mode, the first mode or the second mode, the illumination light and the video light projected based on the contents should be projected. Have each
The control unit is an illumination device that switches between the first mode and the second mode based on the mode identification information when the illumination light and the image light are projected. The lighting device according to claim 1 or 2 , wherein the contrast of the shadow pattern is smaller in the first mode than in the second mode. Any one of claims 1 to 3, wherein the control unit blurs the shadow pattern in the first mode based on a blur setting value set in advance so that the shadow pattern is not visually recognized by the irradiated body. The lighting device according to item 1.

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