WO2023281804A1 - 照明装置および3次元映像表示装置 - Google Patents
照明装置および3次元映像表示装置 Download PDFInfo
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- WO2023281804A1 WO2023281804A1 PCT/JP2022/007347 JP2022007347W WO2023281804A1 WO 2023281804 A1 WO2023281804 A1 WO 2023281804A1 JP 2022007347 W JP2022007347 W JP 2022007347W WO 2023281804 A1 WO2023281804 A1 WO 2023281804A1
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- WIPO (PCT)
- Prior art keywords
- light
- lens
- reflector
- reflective
- light emitted
- Prior art date
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/12—Combinations of only three kinds of elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/08—Refractors for light sources producing an asymmetric light distribution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/33—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving directional light or back-light sources
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors
Definitions
- the present invention relates to lighting devices and 3D image display devices.
- Patent Document 1 discloses a device that collimates light emitted from a light source with a lens and reflects the light emitted from the lens with a reflective surface to change the traveling direction of the light emitted from the lens.
- An object of one embodiment of the present invention is to provide a compact lighting device and a three-dimensional image display device.
- a lighting device includes a light source, a lens into which light emitted from the light source is incident, and a plurality of first reflection areas, and each of the first reflection areas emits light emitted from the lens. in a first direction that intersects the optical axis of light incident on the lens.
- the plurality of first reflective areas are spaced apart such that the distance from the lens in the second direction in which the optical axis extends is greater for the first reflective areas positioned closer to the light exit side of the reflector in the first direction. are arranged through steps.
- the light distribution angle of the light emitted from the first portion located on the light emission side in the first direction with respect to the optical axis in the lens is the light distribution angle of the light emitted from the lens on the light emission side in the first direction with respect to the optical axis. is smaller than the light distribution angle of the light emitted from the second portion located on the opposite side of the .
- a three-dimensional image display device includes the illumination device and a display member capable of displaying a three-dimensional image by receiving light emitted from the illumination device.
- FIG. 1 is an exploded perspective view showing a three-dimensional image display device including a lighting device and a display member according to a first embodiment
- FIG. 1 is an exploded perspective view showing part of a 3D image display device according to a first embodiment
- FIG. 2 is a top view showing the light source, lens, reflector, and display member of the 3D image display device according to the first embodiment
- FIG. 2 is a top view showing lenses of the 3D image display device according to the first embodiment
- FIG. FIG. 2 is a schematic diagram showing paths of light in the three-dimensional image display device according to the first embodiment
- FIG. 5 is a top view showing a 3D image display device according to a second embodiment
- 7 is a cross-sectional view taken along line VII-VII of FIG. 6;
- FIG. It is a side view which shows the lens and reflector in the illuminating device which concerns on 3rd Embodiment.
- the X-axis, Y-axis, and Z-axis are orthogonal to each other.
- the direction in which the X-axis extends is defined as the "X-direction”
- the direction in which the Y-axis extends is defined as the "Y-direction”
- the direction in which the Z-axis extends is defined as the "Z-direction”.
- the Z direction is also referred to as the upward direction
- the opposite direction to the Z direction is also referred to as the downward direction, but these directions are irrelevant to the gravitational direction.
- parallel means parallel within a practical range that allows for errors due to manufacturing accuracy, assembly accuracy, etc.
- FIG. 1 is an exploded perspective view showing a three-dimensional image display device including an illumination device and a display member according to this embodiment.
- FIG. 2 is an exploded perspective view showing a part of the 3D image display device according to this embodiment.
- FIG. 3 is a top view showing the light source, lens, reflector, and display member of the three-dimensional image display device according to this embodiment.
- FIG. 4 is a top view showing the lens of the 3D image display device according to this embodiment.
- FIG. 5 is a schematic diagram showing paths of light in the three-dimensional image display device according to this embodiment.
- the illumination device 11 is provided with a light source 110, a lens 120, and a reflector 130, as outlined with reference to FIG.
- Light emitted from the light source 110 enters the lens 120 .
- Reflector 130 has a plurality of reflective areas 133a, and as shown in FIG. The light is reflected in the first direction D1.
- the first direction D1 is the Y direction in this embodiment.
- the “optical axis C of the light incident on the lens 120” refers to a position where the illuminance of the light emitted from the light source 110 is maximized on a plane intersecting the light incident on the lens 120, means a straight line passing through the position where the illuminance of the light is maximum on another plane that intersects with the light incident on .
- the reflection area 133a located on the light emission side +Y of the reflector 130 in the first direction D1 has a larger distance d0 from the lens 120 in the second direction D2 in which the optical axis C extends. are arranged with a step 133b therebetween.
- the second direction D2 is the X direction in this embodiment and is orthogonal to the first direction D1. However, the second direction D2 does not have to be orthogonal to the first direction D1.
- the light distribution angle ⁇ L1 of the light emitted from the first portion 120a located on the light emission side +Y in the first direction D1 from the optical axis C of the lens 120 is greater than the optical axis C of the lens 120. It is smaller than the light distribution angle ⁇ L2 of the light emitted from the second portion 120b located on the side ⁇ Y opposite to the light emission side +Y in the first direction D1. That is, the light distribution angle ⁇ L1 ⁇ the light distribution angle ⁇ L2.
- Light distribution angles ⁇ L1 and ⁇ L2 can be measured, for example, by a method based on JIS C 8105-5:2011.
- the illumination device 11 may further include a substrate 140, a housing 150, a light shielding member 160, and a support member 170 in addition to the light source 110, the lens 120, and the reflector 130 described above, as shown in FIG.
- the light source 110 is arranged on the substrate 140 .
- Housing 150 accommodates light source 110 , lens 120 , reflector 130 , substrate 140 and light blocking member 160 .
- the light blocking member 160 controls light incident on the lens 120 from the light source 110 .
- Support member 170 supports substrate 140 .
- the illumination device 11 is used in combination with the display member 12 in this embodiment.
- the light emitted from the illumination device 11 is incident on the display member 12, so that the display member 12 displays a three-dimensional image upward.
- a device obtained by combining the illumination device 11 and the display member 12 will be referred to as a "three-dimensional image display device 10".
- the lighting device may be used in combination with other members rather than in combination with the display member.
- infrared light is emitted from the lighting device, and this infrared light is used as a light curtain.
- An example is the use as a sensor device.
- you may use an illuminating device independently.
- the illumination device alone, there are examples in which the illumination device emits ultraviolet light and is used as a sterilization device, or in which a color-tunable light source is used for wall illumination.
- a color-tunable light source is used for wall illumination.
- Substrate 140 includes an insulating layer and wiring.
- the shape of the substrate 140 is flat as shown in FIG.
- the substrate 140 has a flat surface 141 parallel to the YZ plane and a rear surface 142 opposite to the surface 141 and parallel to the YZ plane.
- a light source 110 is arranged on the surface 141 .
- the shape of the substrate is not limited to the above shape.
- the light source may be held by a holder or the like having wiring instead of the substrate.
- the light source 110 includes a light emitting element and a wavelength converting member.
- the light emitting element is an LED (Light Emitting Diode), an LD (Laser Diode), or the like.
- the light emitting elements are electrically connected to wiring on the substrate 140 .
- the wavelength conversion member absorbs part of the light emitted by the light emitting element and emits light with an emission peak wavelength different from the emission peak wavelength emitted by the light emitting element.
- a wavelength conversion member contains fluorescent substance, for example.
- the optical axis C of the light emitted from the light source 110 extends in the X direction, as shown in FIG.
- the light source 110 emits visible light in this embodiment.
- the light source 110 may emit mixed-color light of light emitted by the light emitting element and light emitted by the wavelength conversion member. Moreover, most of the light emitted by the light emitting element may be absorbed by the wavelength conversion member, and the light source 110 may mainly emit the light emitted by the wavelength conversion member.
- the configuration of the light source is not limited to the above.
- the light source may not be provided with the wavelength converting member.
- light emitted by the light emitting element is emitted from the light source.
- the light source may be configured to emit ultraviolet light, infrared light, or monochromatic light in the visible region depending on the application of the lighting device.
- the lens 120 is arranged on the optical axis C. Light emitted by the light source 110 is incident on the lens 120 .
- the lens 120 has a body portion 121 and a collar portion 122 in this embodiment as shown in FIG.
- a resin material such as acrylic (PMMA) or polycarbonate (PC), or a translucent material such as quartz glass.
- the refractive index of the translucent material used for the lens 120 is preferably about 1.4 to 1.9. However, the refractive index of the translucent material used for the lens is not limited to the above range.
- the main body part 121 has an asymmetrical shape with the optical axis C as a reference.
- the surface of the body portion 121 includes a light incident surface 121a, a light emitting surface 121b, a side surface 121c, an upper surface 121d, and a lower surface 121e.
- the upper surface 121d is a flat surface parallel to the XY plane.
- the lower surface 121e is positioned below the upper surface 121d.
- the lower surface 121e is a flat surface parallel to the XY plane.
- the light incident surface 121a is located between the upper surface 121d and the lower surface 121e and faces the light source 110. Light emitted from the light source 110 is incident on the light incident surface 121a.
- the light incident surface 121a is a flat surface parallel to the YZ plane in this embodiment. However, the light incident surface may be a curved surface.
- the light exit surface 121b is located between the upper surface 121d and the lower surface 121e and on the opposite side of the light entrance surface 121a in the X direction.
- the light exit surface 121b emits the light incident on the body portion 121. As shown in FIG.
- the shape of the light exit surface 121b when viewed from above is a convex surface.
- the light exit surface 121b is a free-form surface.
- a vertex 121t0 in the X direction of the light exit surface 121b is located approximately on the optical axis C.
- the angle ⁇ t1 formed between the tangential line TL1 of the first end portion 121t1 of the light emitting side +Y in the Y direction of the light emitting surface 121b and the X direction is the angle ⁇ t1 of the second end portion 121t2 of the light emitting surface 121b opposite to the Y direction ⁇ Y. It is smaller than the angle ⁇ t2 formed between the tangent TL2 and the X direction. That is, the formed angle ⁇ t1 ⁇ the formed angle ⁇ t2.
- the angle between the light L1 and the optical axis C becomes smaller than the angle between the light L2 and the optical axis C.
- the light distribution angle ⁇ L1 emitted from the first region 121s1 positioned on the light emission side +Y in the Y direction from the optical axis C on the light emission surface 121b is the opposite angle in the Y direction from the optical axis C on the light emission surface 121b.
- the Y-direction length d1 of the first region 121s1 is shorter than the Y-direction length d2 of the second region 121s2.
- the magnitude relationship of these lengths is not limited to the above.
- the side surface 121c continues to the second end 121t2 of the light emitting surface 121b, extends toward the light incident surface 121a, and does not reach the light incident surface 121a.
- the side surface 121c is, for example, a flat surface parallel to the XZ plane. However, the side surface may be a curved surface. Also, the main body may not have side surfaces. Further, the main body portion 121 may be further provided with another side surface continuous with the first end portion 121t1 of the light emitting surface 121b and extending toward the light incident surface 121a.
- the flange portion 122 includes a first flange portion 122a that protrudes from the end portion of the main body portion 121 closer to the light source 110 in the X direction toward the light emitting side +Y in the Y direction, and a first flange portion 122a that protrudes toward the light emitting side +Y in the Y direction from the end portion of the main body portion 121 closer to the light source 110 in the X direction. and a second collar portion 122b protruding from the end of the to the opposite side ⁇ Y in the Y direction.
- the first collar portion 122a continues to the light exit side +Y end of the light incident surface 121a in the Y direction and the first end 121t1 of the light exit surface 121b, and extends to the light exit side +Y in the Y direction.
- the second collar portion 122b is connected to the end of the light incident surface 121a on the opposite side -Y in the Y direction and the end of the side surface 121c on the side of the light incident surface 121a in the X direction, and extends to the opposite side -Y in the Y direction.
- the shape of the lens is not particularly limited to the above shape as long as the light distribution angle ⁇ L1 ⁇ the light distribution angle ⁇ L2.
- the lens may not have a flange.
- both the light incident surface and the light exit surface of the lens may be continuous curved surfaces.
- the first end point located at the end of the light emitting side +Y in the Y direction of the lens and the second end point located at the end of the opposite side -Y of the lens are used as boundaries, and the light source side in the X direction
- the surface may be used as the light entrance surface, and the surface on the side of the reflector in the X direction may be used as the light exit surface.
- the light emitted from the light emitting surface 121b of the lens 120 is preferably non-parallel light.
- the light emitted from the light emitting surface 121b of the lens 120 spreads in the Y direction as it approaches the reflector 130 in the X direction, as shown in FIG.
- the reflector 130 is arranged on the optical axis C as shown in FIG. That is, the light source 110, the lens 120, and the reflector 130 are arranged on the optical axis C in this order. Reflector 130 reflects the light emitted from lens 120 in the Y direction.
- the shape of the reflector 130 is flat as shown in FIG.
- the surfaces of reflector 130 include upper surface 131, lower surface 132, reflective surface 133, and side surface 134 in this embodiment, as shown in FIG.
- the upper surface 131 is a flat surface parallel to the XY plane.
- the lower surface 132 is located below the upper surface 131 and is a flat surface parallel to the XY plane.
- the reflective surface 133 is located between the upper surface 131 and the lower surface 132 and faces the lens 120 .
- the reflective surface 133 has a plurality of reflective regions 133a and a plurality of steps 133b. As described above, the plurality of reflective regions 133a are arranged in a row with the steps 133b interposed therebetween so that the distance d0 from the lens 120 in the X direction increases for the reflective regions 133a located on the light emitting side +Y in the Y direction. are arranged in As a result, the length of the reflector 130 in the Y direction can be made smaller than when the reflector is not provided with a step. Adjacent reflective areas 133a partially overlap each other when viewed in the X direction. Therefore, the length of the reflector 130 in the Y direction can be further reduced. However, adjacent reflective areas do not have to overlap when viewed in the X direction.
- each reflection area 133a in top view is, for example, a part of the circumference.
- the shape of each reflection area is not limited to the above.
- the shape of each reflective area may be a flat surface or another curved surface.
- the region on the light emitting side +Y in the Y direction from the optical axis C, and the entire area on the light emitting side in the Y direction from the optical axis C The reflective area 133a positioned at +Y is referred to as a "first reflective portion 133g1".
- the reflective region 133a located on the optical axis C is located on the opposite side of the optical axis C in the Y direction -Y region, and the whole is on the opposite side of the optical axis C in the Y direction-
- the reflective area 133a located at Y is referred to as a "second reflective portion 133g2".
- the first reflector 133g1 has a focus at a first position P1 on the optical axis C.
- the second reflector 133g2 has a focal point at a second position P2 on the optical axis C closer to the light source 110 than the first position P1.
- Light source 110 is positioned closer to lens 120 than first position P1 and second position P2.
- the path of light emitted from the light source 110 and passing through the lens 120 is indicated by a solid line.
- the lens 120 is not provided in the illumination device 11 and the light sources 110 are arranged at the first position P1 and the second position P2, respectively, the light is emitted from the light source 110 and reaches the reflector 130.
- a two-dot chain line indicates the path of incident light.
- the path of the light emitted from the first region 121s1 is the same as that of the light when the lens 120 is not provided and the light source 110 is arranged at the first position P1. It has a shape that roughly matches the route.
- each reflection region 133a of the first reflection portion 133g1 becomes parallel light parallel to the Y direction.
- the path of the light emitted from the second region 121s2 is not provided with the lens 120, and the light source 110 is arranged at the second position P2. It has a shape that roughly matches the path of light in the case of Therefore, the light reflected by each reflection region 133a of the second reflection portion 133g2 becomes parallel light parallel to the Y direction.
- the light emitted from the lens 120 and incident on each reflection area 133a is collimated by each reflection area 133a.
- the reflector may have three or more reflecting parts with mutually different focal positions.
- the light exit surface of the lens may be divided into three or more regions according to the three or more reflective portions of the reflector, and the light emitted from each region may illuminate the corresponding reflective portion.
- the side surface 134 is located between the upper surface 131 and the lower surface 132 and forms a side surface of the reflector 130 other than the reflecting surface 133 .
- the length of the reflector 130 in the Y direction is shorter than the length of the reflector 130 in the X direction in this embodiment.
- the magnitude relationship of these lengths is not limited to the above.
- the reflector 130 may be composed of a resin member and a reflective film such as a metal film or a dielectric multilayer film provided on the surface of the resin member and forming the reflective surface 133 . Moreover, the reflector 130 may be entirely made of a metal material. In these cases, reflector 130 reflects the light emitted from lens 120 by specular reflection. In such a case, the light emitted from each reflection area 133a can easily be parallel light parallel to the Y direction. However, the reflector may reflect the light emitted from the lens by diffuse reflection. In such a case, the light emitted from each reflection area 133a can be spread in the Z direction.
- the housing 150 has a housing member 151 capable of housing the light source 110, the lens 120, the reflector 130, and the substrate 140, and a lid member 152, as shown in FIG.
- the housing member 151 has a bottom plate portion 151a, a first side plate portion 151b, a second side plate portion 151c, and a third side plate portion 151d.
- the bottom plate portion 151a has a flat plate shape parallel to the XY plane, and is separated from the first placement portion 151e in the X direction by the first placement portion 151e where the lens 120 and the reflector 130 are placed.
- a second placement portion 151f which is adjacent to and recessed below the first placement portion 151e and in which the substrate 140 is placed, and a second placement portion 151f provided in a part of the periphery of the first placement portion 151e and above the first placement portion 151e. and a projecting frame portion 151g.
- the frame portion 151g includes a first portion 151p1 capable of sandwiching the first collar portion 122a between itself and the light shielding member 160, a second portion 151p2 capable of sandwiching the second collar portion 122b between itself and the light shielding member 160, and a third portion 151p3 having a shape corresponding to the side surface 134 of the reflector 130 and facing the side surface 134 of the reflector 130 .
- the first side plate portion 151b is continuous with the end of the bottom plate portion 151a on the light emission side +Y in the Y direction and extends upward.
- the shape of the first side plate portion 151b is flat and parallel to the XZ plane.
- a recess 156 recessed downward is provided in the first side plate portion 151b.
- the second side plate portion 151c extends in the Z direction, connecting to the end of the bottom plate portion 151a on the opposite side in the Y direction -Y.
- the shape of the second side plate portion 151c is flat and parallel to the XZ plane.
- the third side plate portion 151d is connected to the X-direction end of the bottom plate portion 151a and extends in the Z-direction.
- the shape of the third side plate portion 151d is flat and parallel to the YZ plane.
- the lid member 152 covers the upper opening of the housing member 151 while being placed on the housing member 151 .
- the lid member 152 is fixed to the housing member 151 with fasteners such as screws or rivets.
- the housing 150 is made of resin material or metal material.
- the inner surface of housing 150 is preferably dark, more preferably black.
- the color of the inner surface of housing 150 is not limited to the above.
- the shape of the housing is not limited to the above as long as it is a shape that can accommodate each component of the lighting device.
- the light blocking member 160 is arranged between the light source 110 and the lens 120, as shown in FIG.
- the shape of the light shielding member 160 is flat plate-like and parallel to the YZ plane.
- the light shielding member 160 is provided with an opening 161 passing through the light shielding member 160 in the X direction.
- the aperture 161 is provided in a range overlapping the light incident surface 121a of the lens 120 when viewed in the X direction.
- the light directed toward the light incident surface 121 a of the lens 120 enters the light incident surface 121 a through the aperture 161 .
- the light directed toward the collar portion 122 and the like is blocked by the light shielding member 160 .
- the light shielding member 160 is fixed to the housing 150 with fasteners such as screws or rivets, with the collar portion 122 of the lens 120 sandwiched between the first portion 151p1 and the second portion 151p2 of the frame portion 151g. be done. Thereby, the lens 120 is fixed to the housing 150 .
- the light shielding member 160 is made of, for example, a resin material or a metal material.
- the surface of the light shielding member 160 is preferably dark, more preferably black.
- the support member 170 has a flat plate shape and is parallel to the YZ plane.
- the support member 170 has a surface 171 parallel to the YZ plane and a back surface 172 opposite the surface 171 .
- Substrate 140 is positioned on surface 171 and secured to support member 170 by fasteners such as screws or rivets, for example.
- the support member 170 is fixed to the housing 150 by fasteners such as screws or rivets, for example. Thereby, the light source 110 is fixed to the housing 150 .
- the support member 170 is made of, for example, a resin material or a metal material.
- the display member 12 is arranged to face the reflecting surface 133 of the reflector 130 in the Y direction, as shown in FIG. In this embodiment, the display member 12 is in contact with the +Y end of the reflector 130 on the light exit side in the Y direction. However, the display member does not have to be in contact with the reflector.
- the display member 12 is, for example, a light guide plate provided with a plurality of arcuate lines (not shown) according to the image to be displayed.
- the shape of the display member 12 is flat and parallel to the XY plane.
- the shape of the display member 12 in top view is a rectangle.
- the shape of the display member is not limited to the above.
- the opposite -Y end of the display member 12 in the Y direction is placed in the concave portion 156 of the housing 150 as shown in FIG.
- the display member 12 is made of, for example, a translucent material such as glass or acrylic resin.
- the illumination device 11 irradiates the display member 12 with light from the Y direction
- part of the light incident on the display member 12 is radiated in a specific direction by arcuate lines. Therefore, the user sees a specific portion of the arc-shaped engraving that corresponds to the position of his or her eye brightly. Since the right eye and left eye of the user see different bright spots, when the user looks at the display member 12 with both eyes, a specific position above the display member 12 appears bright. Therefore, the user can visually recognize a three-dimensional image corresponding to a plurality of arc-shaped line markings above the display member 12 . In this way, the display member 12 displays a three-dimensional image by arc three-dimensional display.
- the light incident on the display member 12 is emitted from the display member 12 in the Y direction. However, part of the light incident on the display member 12 may be directed in a direction different from the Y direction due to the arc-shaped line.
- the structure of the display member is not limited to the above as long as it can display 3D images.
- the display member may be a hologram sheet, and may display a three-dimensional image by holography.
- the angle ⁇ t1 between the tangential line TL1 of the first end 121t1 of the light emitting surface 121b of the lens 120 and the X direction is larger than the angle ⁇ t2 between the second end 121t2 of the light emitting surface 121b and the X direction. is also small. Therefore, the refraction angle of the light L1 that enters the lens 120 and exits from the first end 121t1 is larger than the refraction angle of the light L2 that enters the lens 120 and exits from the second end 121t2. As a result, the angle between the light L1 and the optical axis C becomes smaller than the angle between the light L2 and the optical axis C. Therefore, the light distribution angle ⁇ L1 emitted from the first region 121s1 of the light emitting surface 121b is smaller than the light distribution angle ⁇ L2 of the light emitted from the second region 121s2.
- the light emitted from the lens 120 can be prevented from spreading to the light emission side +Y in the Y direction.
- the length of the reflector 130 in the Y direction can be shortened.
- the light emitted from the lens 120 can be prevented from directly entering the display member 12 without passing through the reflector 130 .
- the first region 121s1 of the lens 120 illuminates the first reflecting portion 133g1 of the reflector 130, and most of the light emitted from the second region 121s2 of the lens 120 is reflected by the second reflection of the reflector 130.
- the portion 133g2 is irradiated.
- the path of light emitted from the first region 121s1 is different from the path of light when the lens 120 is not provided and the light source 110 is arranged at the first position P1.
- the shape is roughly the same. Therefore, the light reflected by each reflection region 133a of the first reflection portion 133g1 is parallel to the Y direction.
- the path of light emitted from the second region 121s2 substantially matches the path of light when the lens 120 is not provided and the light source 110 is arranged at the second position P2. It has a shape that Therefore, the light reflected by each reflection region 133a of the second reflection portion 133g2 is parallel to the Y direction. Moreover, the light emitted from the light source 110 does not enter the display member 12 directly, but enters the display member 12 via the lens 120 and the reflector 130 . Therefore, it is possible to suppress illuminance unevenness of the light with which the display member 12 is irradiated.
- each reflective area 133 a Most of the light reflected by each reflective area 133 a enters the display member 12 . Thereby, a three-dimensional image is displayed above the display member 12 . As described above, the light reflected by each reflection area 133a is parallel light parallel to the Y direction, so the display member 12 is irradiated with parallel light from one direction. Therefore, the three-dimensional image displayed by the display member 12 can be made clear.
- the plurality of reflective regions 133a of the reflector 130 are arranged such that the distance d0 from the lens 120 increases as the reflective region 133a is located on the light emitting side +Y in the Y direction. They are arranged via a step 133b. Therefore, the length of the reflector in the Y direction can be shortened. Thereby, the illumination device 11 and the three-dimensional image display device 10 can be miniaturized.
- the light distribution angle ⁇ L1 of the light emitted from the first portion 120a located on the light emission side +Y in the Y direction with respect to the optical axis C of the light incident on the lens 120 is It is smaller than the light distribution angle ⁇ L2 of the light emitted from the second portion 120b positioned on the opposite side ⁇ Y in the Y direction. Therefore, it is possible to prevent the light emitted from the lens 120 from spreading to the light emission side +Y in the Y direction. As a result, it is possible to reduce the length of the reflector 130 in the Y direction and prevent the reflector 130 from being irradiated with the light emitted from the lens 120 .
- the illumination device 11 when the illumination device 11 is applied to the three-dimensional image display device 10, even if the reflector 130 and the display member 12 are brought close to each other, the light emitted from the lens 120 directly reaches the display member 12 without passing through the reflector 130. Injection can be suppressed. Thereby, the three-dimensional image displayed by the display member 12 can be made clear.
- the lens 120 has a convex light exit surface 121b, and the angle ⁇ t1 between the tangent line TL1 of the first end 121t1 on the light exit side +Y in the Y direction of the light exit surface 121b and the X direction is It is smaller than the angle ⁇ t2 formed between the tangential line TL2 of the second end portion 121t2 on the opposite side in the Y direction of the light exit surface 121b and the Y direction and the X direction.
- the light distribution angle ⁇ L1 can be made smaller than the light distribution angle ⁇ L2 by a simple method of adjusting the curvature of the light exit surface 121b.
- the adjacent reflective areas 133a partially overlap. Therefore, the length of the reflector 130 in the Y direction can be further shortened.
- the first reflecting portion 133g1 including some of the plurality of reflecting regions 133a has a focus at the first position P1.
- a second reflecting portion 133g2 including some of the other reflecting regions 133a is located on the opposite side ⁇ Y in the Y direction from the first reflecting portion 133g1 and closer to the reflector 130 than the first position P1. 2 has a focus at position P2.
- Light emitted from the first portion 120a of the lens 120 illuminates the first reflecting portion 133g1, and light emitted from the second portion 120b of the lens 120 illuminates the second reflecting portion 133g2.
- the reflective surface 133 of the reflector 130 is divided into two reflective portions 133g1 and 133g2. Therefore, the design of the lens 120 is facilitated.
- the light exit surface 121b of the lens 120 has a first area 121s1 positioned on the light exit side +Y in the Y direction of the optical axis C and a second area 121s1 positioned on the opposite side -Y in the Y direction of the optical axis C. 121s2 and
- the length d1 in the Y direction of the first region 121s1 is shorter than the length d2 in the Y direction of the second region 121s2. Therefore, it is possible to prevent the light emitted from the lens 120 from spreading to the light emission side +Y in the Y direction.
- each reflection area 133a the light emitted from the lens 120 and incident on each reflection area 133a is collimated by each reflection area 133a. That is, the light emitted from lens 120 is non-parallel, and reflector 130 collimates the light emitted from lens 120 . Thereby, the irradiation width of the light emitted from the reflector 130 can be widened while shortening the length of the reflector 130 in the Y direction.
- FIG. 6 is a top view showing the 3D image display device according to this embodiment.
- 7 is a cross-sectional view taken along line VII-VII of FIG. 6.
- the 3D image display device 20 including the illumination device 21 according to this embodiment is different from the illumination device 11 according to the first embodiment in that it further includes another lens 280 into which the light emitted from the reflector 130 is incident.
- this embodiment is the same as the first embodiment. The same applies to other embodiments described later.
- Another lens 280 is positioned between the reflector 130 and the display member 12 .
- the other lens 280 extends with the X direction as its longitudinal direction.
- the other lenses 280 have the same cross-sectional shape perpendicular to the X direction.
- “the cross-sectional shape is the same” means that the cross-sectional shape is the same within a practical range that allows an error due to manufacturing accuracy or the like.
- Another lens 280 is, for example, a cylindrical lens.
- Another lens 280 includes a top surface 281, a bottom surface 282, a light entrance surface 283, and a light exit surface 284, as shown in FIG.
- the upper surface 281 is a flat surface parallel to the XY plane.
- the lower surface 282 is located below the upper surface 281 and is a flat surface parallel to the XY plane.
- the light incident surface 283 is a flat surface that is continuous with the opposite -Y end of the upper surface 281 in the Y direction and the opposite -Y end of the lower surface 282 in the Y direction and is parallel to the XZ plane.
- the light exit surface 284 continues to the light exit +Y end of the upper surface 281 in the Y direction and the light exit +Y end of the lower surface 282 in the Y direction.
- the light exit surface 284 is part of the side surface of the cylinder.
- the light emitting surface 284 continues to the end of the light emitting side +Y in the Y direction of the lower surface 282 and curves toward the light emitting side +Y in the Y direction as it goes upward.
- the shape of other lenses is not limited to the above.
- the other lens may have a symmetrical shape with respect to a plane parallel to the XY plane passing through the center of the other lens in the Z direction, that is, a vertically symmetrical shape.
- the light exit surface of another lens may be a curved surface other than the side surface of the cylinder, or may be an inclined surface inclined with respect to the XZ plane.
- each reflective area 133 a of the reflector 130 enters the light incident surface 283 of another lens 280 .
- Most of the light incident on other lens 280 exits from light exit surface 284 of other lens 280 .
- Light emitted from the light exit surface 284 spreads in a third direction D3 orthogonal to the first direction D1 and the second direction.
- the third direction D3 corresponds to the Z direction in this embodiment.
- the illumination device 21 according to the present embodiment further includes another lens 280 that receives the light reflected by the reflector 130, extends in the X direction as a longitudinal direction, and controls the spread of the light emitted from the reflector 130 in the Z direction. Therefore, the other lens 280 can control the spread of the light emitted from the reflector 130 in the Z direction.
- the other lens 280 When the light emitted from each reflective area 133a is parallel light parallel to the Y direction, the other lens 280 generally maintains the state in which the light emitted from each reflective area 133a is parallel to the Y direction when viewed from above. It is possible to control the spread of the light emitted from each reflection area 133a in the Z direction while maintaining the same. Therefore, when the illumination device 21 is applied to the 3D image display device 20, the 3D image displayed by the display member 12 is suppressed from being blurred, and the other lens 280 spreads light over a wide range of the display member 12. Irradiation is possible. Further, when the illumination device 21 is applied to a sterilization device or the like, the light can be spread in the Z direction, so the sterilization range can be widened.
- FIG. 8 is a side view showing the lens and reflector in the illumination device according to this embodiment.
- the lighting device 31 according to this embodiment differs from the lighting device 11 according to the first embodiment in the configuration of the reflector 330 .
- the reflecting surface 333 of the reflector 330 has a plurality of first reflecting regions 333a, a plurality of steps 333b, a plurality of second reflecting regions 333c, and a plurality of steps 333d.
- Each first reflection area 333a and each second reflection area 333c reflect light emitted from the lens 120 in the Y direction.
- the plurality of first reflective regions 333a are arranged in a line with a step 333b therebetween so that the distance from the lens 120 in the X direction increases as the first reflective region 333a located on the light emission side +Y in the Y direction increases. arrayed.
- the plurality of second reflective regions 333c are arranged via a step 333d so that the second reflective regions 333c located on the light emitting side +Y in the Y direction have a greater distance from the lens 120 in the X direction. arranged in one row.
- the row of the plurality of first reflection regions 333a arranged in one row and the row of the plurality of second reflection regions 333c arranged in one row are arranged in the Z direction. Also, the plurality of first reflection regions 333a and the plurality of second reflection regions 333c are arranged in a zigzag pattern in the Z direction. Therefore, the steps 333b and 333d are arranged so as not to be adjacent to each other in the Z direction.
- the effects of this embodiment will be described.
- Most of the light emitted from the lens 120 enters the multiple first reflective areas 333 a and the multiple second reflective areas 333 c of the reflector 330 .
- the steps 333b between the plurality of first reflective regions 333a the light reflected by each first reflective region 333a tends to be dark.
- steps 333d between the plurality of second reflection regions 333c the light reflected by each second reflection region 333c tends to be dark.
- the plurality of first reflective regions 333a and the plurality of second reflective regions 333c are arranged in a staggered manner in the Z direction.
- the position in the X direction of the optical axis of the reflected light deviates from the position in the X direction of the optical axis of the light reflected by each first reflection region 333a. Therefore, it is possible to suppress conspicuous dark portions between the light beams reflected by the first reflective regions 333a and between the light beams reflected by the second reflective regions 333c.
- the illumination device may be configured to include at least a light source and a lens with an asymmetrical light distribution with respect to the optical axis of incident light. That is, the illumination device does not need to include the reflector having the stepped reflective surface described in the above embodiments. Also in this case, it is possible to obtain the effect that the light distribution of the light emitted from the lens can be made asymmetric with respect to the optical axis.
- a lighting device may be provided with a reflector having no steps on the reflecting surface instead of the reflector having steps on the reflecting surface.
- such a lighting device may be provided with a reflector having no steps on the reflecting surface, and may be used in a three-dimensional image display device in combination with a display member.
- such a lighting device does not include a reflector with a step on the reflecting surface and a reflector without a step on the reflecting surface, and is used in a three-dimensional image display device or the like in combination with a display member.
- a lighting device may be used alone for signboard lighting or the like without including a reflector with a stepped reflective surface and a reflector without a stepped reflective surface.
- the illumination device may be configured to include at least a light source section including one or more light sources and a reflector having a reflective surface provided with a step. That is, the illumination device does not need to include a lens with an asymmetrical light distribution with respect to the optical axis of incident light. Also in this case, it is possible to obtain the effect that the size of the reflector can be reduced at least in the first direction.
- Such an illumination device may include a lens with a symmetrical light distribution with respect to the optical axis of incident light instead of a lens with an asymmetrical light distribution.
- such an illumination device may be provided with a lens having a symmetrical light distribution, and may be used in a three-dimensional image display device in combination with a display member.
- such an illumination device may be used in a three-dimensional image display device or the like in combination with a display member without including a lens with an asymmetrical light distribution or a lens with a symmetrical light distribution.
- such an illumination device may be used alone in a sterilization device or the like without including a lens with an asymmetrical light distribution or a lens with a symmetrical light distribution. If the lighting device does not comprise a lens with an asymmetrical light distribution or a lens with a symmetrical light distribution, a light source may be arranged at each focal point of the reflector.
- the present invention can be used, for example, in a three-dimensional image display device, a sterilization device, a wall lighting device, or an area sensor device.
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Abstract
Description
先ず、第1の実施形態について説明する。
図1は、本実施形態に係る照明装置および表示部材を含む3次元映像表示装置を示す分解斜視図である。
図2は、本実施形態に係る3次元映像表示装置の一部を示す分解斜視図である。
図3は、本実施形態に係る3次元映像表示装置の光源、レンズ、リフレクタ、および表示部材を示す上面図である。
図4は、本実施形態に係る3次元映像表示装置のレンズを示す上面図である。
図5は、本実施形態に係る3次元映像表示装置における光の経路を示す模式図である。
基板140は、絶縁層および配線を含む。基板140の形状は、図2に示すように、平板状である。基板140は、平坦面であり、YZ平面に平行な表面141と、表面141の反対側に位置し、平坦面であり、YZ平面に平行な裏面142と、を有する。表面141の上には、光源110が配置されている。
支持部材170は、例えば、樹脂材料または金属材料からなる。
表示部材12は、図3に示すように、リフレクタ130の反射面133とY方向において対向するように配置されている。表示部材12は、本実施形態ではリフレクタ130のY方向における光出射側+Yの端部と接している。ただし、表示部材はリフレクタと接していなくてもよい。
光源110を点灯させた場合、図5に示すように、光源110が発する光の大部分は、レンズ120の光入射面121aに入射する。
本実施形態に係る照明装置11においては、リフレクタ130の複数の反射領域133aが、Y方向における光出射側+Yに位置する反射領域133aほど、レンズ120からの距離d0が大きくなるように、間に段差133bを介して配列されている。そのため、リフレクタのY方向の長さを短くできる。これにより、照明装置11および3次元映像表示装置10を小型化できる。
次に、第2の実施形態について説明する。
図6は、本実施形態に係る3次元映像表示装置を示す上面図である。
図7は、図6のVII-VII線における断面図である。
本実施形態に係る照明装置21を含む3次元映像表示装置20は、リフレクタ130から出射した光が入射する他のレンズ280をさらに備える点で、第1の実施形態に係る照明装置11と相違する。
なお、以下の説明においては、原則として、第1の実施形態との相違点のみを説明する。以下に説明する事項以外は、第1の実施形態と同様である。後述する他の実施形態についても同様である。
本実施形態に係る照明装置21は、リフレクタ130が反射した光が入射し、X方向を長手方向として延び、リフレクタ130から出射した光のZ方向の広がりを制御する他のレンズ280をさらに備える。そのため、他のレンズ280によって、リフレクタ130から出射した光のZ方向の広がりを制御できる。
次に、第3の実施形態について説明する。
図8は、本実施形態に係る照明装置におけるレンズおよびリフレクタを示す側面図である。
本実施形態に係る照明装置31は、リフレクタ330の構成が第1の実施形態に係る照明装置11と相違する。
レンズ120から出射した光の大部分は、リフレクタ330の複数の第1反射領域333aおよび複数の第2反射領域333cに入射する。複数の第1反射領域333aの間に段差333bが存在することに起因して、各第1反射領域333aが反射した光の間は、暗くなりやすい。同様に、複数の第2反射領域333cの間に段差333dが存在することに起因して、各第2反射領域333cが反射した光の間は、暗くなりやすい。これに対して、本実施形態では、複数の第1反射領域333aおよび複数の第2反射領域333cは、Z方向に千鳥状に配置されているため、上面視において、各第2反射領域333cが反射した光の光軸のX方向における位置は、各第1反射領域333aが反射した光の光軸のX方向における位置からずれる。そのため、各第1反射領域333aが反射した光の間や各第2反射領域333cが反射した光の間が、暗部として目立つことを抑制できる。
Claims (10)
- 光源と、
前記光源から出射した光が入射するレンズと、
複数の第1反射領域を有し、各前記第1反射領域が前記レンズから出射した光を、前記レンズに入射する光の光軸と交差する第1方向に反射するリフレクタと、
を備え、
前記第1方向における前記リフレクタの光出射側に位置する前記第1反射領域ほど、前記光軸が延びる第2方向における前記レンズからの距離が大きくなるように、前記複数の第1反射領域は間に段差を介して配列されており、
前記レンズにおいて前記光軸よりも前記第1方向における前記光出射側に位置する第1部分から出射した光の配光角は、前記レンズにおいて前記光軸よりも前記第1方向における前記光出射側の逆側に位置する第2部分から出射した光の配光角よりも小さい、照明装置。 - 前記レンズは、凸曲面状の光出射面を有し、
前記光出射面のうち前記第1方向における前記光出射側の第1端部の接線と前記第2方向とがなす角は、前記光出射面のうち前記第1方向における前記逆側の第2端部の接線と前記第2方向とがなす角よりも小さい、請求項1に記載の照明装置。 - 前記第2方向に見て、隣り合う前記第1反射領域は部分的に重なっている請求項1または2に記載の照明装置。
- 前記リフレクタが反射した光が入射し、前記第2方向を長手方向として延び、前記リフレクタが反射した光の前記第1方向および前記第2方向と直交する第3方向における広がりを制御する他のレンズをさらに備える請求項1~3のいずれか1つに記載の照明装置。
- 前記リフレクタは、複数の第2反射領域をさらに有し、
各前記第2反射領域は、前記レンズから出射した光を前記第1方向に反射し、
前記第1方向における前記光出射側に位置する前記第2反射領域ほど、前記第2方向における前記レンズからの距離が大きくなるように、前記複数の第2反射領域は、間に段差を介して配列されており、
前記複数の第1反射領域が1列に配列された列と前記複数の第2反射領域が1列に配列された列とは、前記第1方向および前記第2方向と直交する第3方向に並んでおり、
前記複数の第2反射領域と前記複数の第1反射領域は、前記第3方向において千鳥状に配置されている請求項1~4のいずれか1つに記載の照明装置。 - 前記複数の第1反射領域のうちのいくつかを含む第1反射部は、第1位置に焦点を有し、
前記複数の第1反射領域のうちの他のいくつかを含む第2反射部は、前記第1反射部よりも前記第1方向における前記逆側に位置し、前記第1位置よりも前記リフレクタに近い第2位置に焦点を有する請求項1~5のいずれか1つに記載の照明装置。 - 前記第1部分から出射した光は、前記第1反射部を照射し、
前記第2部分から出射した光は、前記第2反射部を照射する請求項6に記載の照明装置。 - 前記レンズは、凸曲面状の光出射面を有し、
前記光出射面は、前記光軸よりも前記第1方向における前記光出射側に位置する第1領域と、前記光軸よりも前記第1方向における前記逆側に位置する第2領域と、を含み、
前記第1領域の前記第1方向における長さは、前記第2領域の前記第1方向における長さよりも短い、請求項1~7のいずれか1つに記載の照明装置。 - 前記レンズから出射して各前記第1反射領域に入射した光は、各前記第1反射領域によってコリメートされる、請求項1~8のいずれか1つに記載の照明装置。
- 請求項1~9のいずれか1つに記載の照明装置と、
前記照明装置から出射した光が入射することにより、3次元映像を表示可能な表示部材と、
を備える3次元映像表示装置。
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