WO2016047426A1 - 光積分器および、それを用いた映像投射装置 - Google Patents
光積分器および、それを用いた映像投射装置 Download PDFInfo
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- WO2016047426A1 WO2016047426A1 PCT/JP2015/075304 JP2015075304W WO2016047426A1 WO 2016047426 A1 WO2016047426 A1 WO 2016047426A1 JP 2015075304 W JP2015075304 W JP 2015075304W WO 2016047426 A1 WO2016047426 A1 WO 2016047426A1
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- light
- optical integrator
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
- G02B6/0006—Coupling light into the fibre
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0994—Fibers, light pipes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
- G02B6/0008—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted at the end of the fibre
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
Definitions
- the present invention relates to an optical integrator that uniformly mixes light and a video projection apparatus using the same.
- Patents such as Patent Documents 1 and 2 are proposed for video projection apparatuses using a transparent rod, and Patent Document 3 is proposed for a display apparatus including a light diffusion layer.
- FSC field sequential color
- Patent Document 1 describes a method of guiding light beams from a plurality of light sources to a rod with a lens.
- Patent Document 2 describes a method in which light beams from a plurality of light sources are combined by a dichroic mirror and then guided to a rod.
- Patent Document 3 describes a method using a light diffusion layer as a method for homogenizing light from a white light source.
- Such a video projection device for a display device is required to be power-saving, bright and compact in order to be worn on the body.
- An object of the present invention is to provide a small optical integrator that improves color mixing and homogeneity in order to reduce the size of the optical system of a video projection apparatus equipped with a multichip light source in which a plurality of light sources are mounted in a single housing. It is to be.
- the optical integrator according to the present invention includes a light incident surface, a light exit surface, and a side surface connecting the light entrance surface and the light exit surface, and the inside of the light integrator has a refractive index of 1.
- the light guide member contains scattering particles having a refractive index of 2 different from the refractive index of 1 that scatters light, and light incident from the incident surface is guided from the incident surface side toward the exit surface.
- the scattered light propagates while being scattered by the scattering particles inside the member, and part of the scattered light is guided to the exit surface by propagating while being confined inside the photodetector by internal reflection of the side surface. Is.
- a low-power, bright and compact video projector can be provided at low cost.
- FIG. 1 is a schematic diagram showing a display device 101.
- FIG. 1 is a schematic diagram showing a display device 101.
- FIG. 1 is a schematic diagram showing a display device 101.
- FIG. 1 is a schematic diagram showing a system of a display device 101.
- FIG. 6 is a diagram illustrating an adjustment flow of the display device 101.
- FIG. 6 is a diagram illustrating an adjustment flow of the display device 101.
- FIG. 6 is a diagram showing an optical integrator 201.
- FIG. 6 is a diagram showing an optical integrator 211.
- FIG. 2 is a diagram showing an optical integrator 221.
- FIG. FIG. 6 is a diagram showing an optical integrator 231. It is a figure explaining the arrangement
- optical integrator 001 First, the optical integrator 001 will be described with reference to FIG.
- the optical integrator 001 has a rectangular column shape having a length L, a height H, and a width W, and the inside thereof is filled with a medium 1 having a predetermined refractive index N1 having a high transparency.
- the optical integrator 001 has incident / exit surfaces 002 and 003 and TIR side surfaces 004 to 007.
- the entrance / exit surfaces 002 and 003 are surfaces on which light enters or exits.
- TIR internal reflection
- the inside of the optical integrator 001 is randomly filled with scattering particles 008 filled with a highly transparent medium 2 having a refractive index 2 different from that of the medium 1. According to Snell's law, light rays are emitted at an angle different from the incident angle when passing through media having different refractive indexes.
- the scattering particle 008 has a function of scattering by changing the angle of the traveling light beam using the principle.
- the scattering particles may be spherical or other shapes. From the viewpoint of cost, it is desirable to use a spherical product that is a general-purpose product.
- the diameter is preferably larger than the wavelength of the incident light and not more than 10 times the wavelength.
- the diameter is 10 times the wavelength or more
- the angle at which the light beam can be changed becomes small, and the optical integrator 001 is lengthened in order to obtain the desired color mixing property and homogeneity. become unable.
- the scattering particles are other than spherical and there are no irregularities on the surface of the scattering particles, the same can be said about the above.
- a fine structure of wavelength order may be provided on the surface of the scattering particles.
- a large scattering effect can be obtained even if the shape is arbitrarily set and the maximum diameter of the scattering particles is increased.
- the height H and width W of the incident / exit surfaces 002 and 003 are approximately the same as the incident light beam or at least the minimum size considering the mounting tolerance.
- the height H and width W of the incident / exit surfaces 002 and 003 are substantially the same as the incident light beam. In this case, it is preferable to adjust at the time of assembly in consideration of mounting tolerances.
- the luminance of the light beam that exits the incident / exit surfaces 002 and 003 is inversely proportional to the area. For this reason, when the area of the incident / exit surface is doubled relative to the area of the incident light beam, the luminance is halved. Further, when the area is increased, the confinement effect is reduced and the color mixing performance is also reduced. For this reason, it is necessary to further increase the packing rate of the scattering particles, and the efficiency further deteriorates.
- Width W and height H of the entrance / exit surfaces 002 and 003 are defined as width W> height H.
- the length L is preferably longer than three times the width W.
- Ordinary surface light sources have a Lambertian distribution with a half-width of 60 °. If the refractive index of a general transparent material is 1.5, it can be said that the light flux taken into the optical integrator 001 is distributed within a range of ⁇ 35 ° according to Snell's law. A 35 ° light beam will be reflected approximately twice as it travels a length L that is three times the width W. That is, the following formula (1) is satisfied. L ⁇ Tan35 ° ⁇ 2 ⁇ W Formula (1)
- the color mixing property and uniformity can be satisfied by adjusting the filling rate of the scattering particles 008.
- the efficiency can be maintained while satisfying the color mixing and homogeneity by adjusting the filling rate.
- the width W and the height H are 1 mm square, the length is 4 mm, the diameter of the scattering particles 008 is about 2 ⁇ m, the refractive index 1 is 1.48, and the refractive index 2 is 1.58.
- the total volume of the medium 2 of the scattering particles 008 with respect to the total volume is preferably set in the range of 0.5% to 1.0%.
- the incident / exit surfaces 002 and 003 are substantially parallel. Light can enter and exit while maintaining the average angle of vertically incident light, which is desirable in terms of efficiency.
- the incident / exit surfaces 002 and 003 have the same shape. Light leakage at the TIR side surface can be reduced, efficient reflection at the TIR side surface can be performed, and loss can be reduced.
- the filling rate of the scattering particles 008 is inversely proportional to the mean free path, which is the average distance between the light and the scattering particles 008, and the light transmittance falls by the number of times the light and the scattering particles collide. Therefore, it can be said that it is proportional to the mean free path. That is, the filling rate of the scattering particles 008 is inversely proportional to the brightness. If the scattering particles 008 are excessively filled, the efficiency is lowered. Therefore, the filling rate of the scattering particles 008 may be determined in consideration of the color mixing property, homogeneity, and efficiency. Further, it is desirable to reduce the surface roughness of the TIR side surface. By reducing the surface roughness of the TIR side surface, leakage light from the reflection side surface is reduced, and high light output is possible.
- the surface roughness of the incident / exit side surfaces 002 and 003 may be increased. In this case, since the incident / exit surface is rough, the light can be made uniform by surface scattering.
- the optical integrator of the present invention is not particularly limited as long as it has a structure filled with a medium 1 and scattering particles (medium 2) having a refractive index different from that of the medium 1 and scattering propagating light. It can be easily obtained by using the materials and manufacturing methods described below.
- a highly transparent material is selected as the material of the medium 1 from the viewpoint of propagating light.
- an acrylic photo-curing resin is used, but there is no particular limitation as long as it is a highly transparent material.
- an epoxy-based thermosetting resin, a thermoplastic resin such as acrylic or polycarbonate, glass, etc. May be used.
- a photocurable resin When a photocurable resin is used, it is easy to mix with the medium 2 when the solid medium 2 is used, and since a process such as cooling and drying is not required after curing, a viewpoint of improving work efficiency, a predetermined It is more preferable from the viewpoint of easily obtaining an optical integrator of the shape. In addition, it is more preferable to use an acrylic material because the transmittance is high and the light use efficiency can be increased.
- the medium 2 can be efficiently obtained by mixing particles having a refractive index different from that of the medium 1 in the medium 1.
- crosslinked polystyrene fine particles are used as the material of the medium 2, but other materials such as plastic particles and glass particles of other materials may be used as long as the materials are highly transparent.
- the refractive index difference between the medium 1 and the medium 2 is 0.005 or more. In the range of 0.005 or more and 0.015 or less, the specific gravity of the medium 1 and the medium 2 can be easily brought close to each other, and it is easy to mix the medium 2 with the medium 1, and the scattering of the efficiency is suppressed. It is more preferable from the viewpoint that the above effect can be easily obtained.
- the refractive indexes of the medium 1 and the medium 2 are compared, either refractive index may be large.
- the refractive index difference in the present invention is the difference between the refractive index of the medium 1 or the medium 2 having a high refractive index and the refractive index of the material 2 or the medium 1 having a low refractive index. The calculated value.
- the particle diameter of the medium 2 is desirably 0.5 ⁇ m or more and 5 ⁇ m or less. This is because, as described above, if the particle size is small, light is scattered too much and the light extraction efficiency decreases, and if the particle size is large, light is difficult to scatter. In addition, it is desirable that the particle diameter is substantially uniform, but there is no problem because 90% or more of the particles are included in the above particle diameter range because the effect is obtained.
- a method of integrating the medium 1 and the medium 2 for example, there is a method in which a liquid medium 1 is prepared, and then the medium 1 and the medium 2 are mixed and then photocured into a predetermined shape. It can be manufactured by other methods such as pressing, injection molding, and cutting. Among these, the use of the liquid medium 1 is more preferable because the medium 2 can be easily mixed, and the state in which the medium 2 is mixed with the medium 1 is also more preferable because it is easy to process into a predetermined shape. .
- the outer periphery may be cut to the product size, or the mold with the product size space is produced, and the resin is poured into the mold and cured. May be.
- the surface roughness (Ra; arithmetic average roughness) of the optical integrator of the present embodiment is desirably small in the length direction of the side surface. This is because when light strikes the side surface and the surface is rough in the length direction of the side surface, the light escapes from the side surface beyond the critical angle. In the direction perpendicular to the length direction, the surface may be rough as long as the light propagation is not adversely affected. In addition, the light incident surface and the light exit surface can be roughened in a range that does not adversely affect the light emission because the effect of increasing the diffusion of light can be expected.
- the surface roughness of the side surface in the optical axis direction is preferably more than 0 ⁇ m to 2.0 ⁇ m, more preferably more than 0 ⁇ m to 1.0 ⁇ m, and further preferably more than 0 ⁇ m to 0.5 ⁇ m.
- the surface roughness of the light incident surface and the light exit surface is equal to or greater than the surface roughness of the side surface, preferably 0.01 ⁇ m to 10 ⁇ m, more preferably 0.5 ⁇ m to 5 ⁇ m, and 0.5 ⁇ m to 3 ⁇ m. Even better.
- the surface roughness in the direction perpendicular to the optical axis of the side surface is more than 0 ⁇ m, and the upper limit is preferably equal to or less than the values listed for the surface roughness of the light incident surface and the light emitting surface described above.
- the surface roughness in the direction perpendicular to the optical axis of the side surface is preferably smaller within the above range, but may be arbitrarily selected from the viewpoint of processing efficiency.
- the surface roughness in the cutting direction and the surface roughness substantially perpendicular to the cutting direction tend to be smaller in the former cutting direction.
- the surface roughness in the direction substantially perpendicular to the cutting direction becomes particularly rough. In this case, by setting the cutting direction as the optical axis direction, it is possible to maintain the light propagation efficiency while maintaining the work efficiency.
- the surface roughness is transferred to the optical integrator.
- the surface roughness (Ra) of the side surface is preferably 1/2 or less of the average particle diameter of the scattering particles introduced as the medium 2. This can be realized in a state where the scattering particles do not protrude from the side surface of the optical integrator, or by scattering and smoothing the scattering particles protruding from the side surface using polishing or cutting.
- FIG. 2 is a schematic view showing the video projection device 011.
- the light path 022 indicated by a broken line is an imaginary line described to assist in explaining the progress of the light beam.
- the light source 012 is a multi-chip light source equipped with a chip that emits light in the red, green, and blue wavelength bands.
- the light source 012 is assumed to be an inexpensive LED that can be generally purchased.
- the light emitted from the optical integrator 001 is illuminated on the video generation device 014 via the illumination lens 013.
- the light travels through the polarization filter 025 from the illumination lens 013 and reaches the image generation device 014, and is selected as linearly polarized light in a predetermined direction.
- the light selected for polarization in a predetermined direction by the polarization filter 025 is illuminated by the video generation device 014.
- the image generation device 014 is a transmissive liquid crystal element without a color filter. For this reason, since the number of pixels can be reduced to 1/3 compared to a liquid crystal having a color filter, a high-resolution image can be realized.
- a display area 015 of the video generation device 014 indicates an area where video is generated. Colorization is realized by FSC technology that emits light in the red, green, and blue wavelength bands in the light source 012 every time.
- the display area 015 has a function of selecting a predetermined polarization for each pixel, which is either a vertical direction or a parallel direction. In the case of making it effective as an image, a polarized light parallel to the direction selected by the polarization filter 025 is selected.
- the light rays that are effective and invalid as the image traveling in the display area 015 are incident on the polarizing filter 026.
- the polarization filter 026 only the light beam having an effective polarization as an image passes, and the light beam having an invalid polarization is absorbed or reflected.
- the light shielding openings 016 and 017 are light shielding openings arranged so that extra light outside the display area 015 is not emitted.
- the lens unit 018 is a projection lens that requires a plurality of lenses, and has a function of enlarging and forming an image of the display area 015 on a screen (not shown).
- the lens unit 018 has a mechanism that can move in a direction away from and a direction away from the image generation device 014. With such a mechanism, it is possible to provide a focus function for changing the image formation position of the image according to the projection distance.
- the light emitted from the lens unit 018 is reflected by the optical axis changing element 019 and projected onto a screen (not shown) through the emission window 020.
- the optical axis changing element 019 has a function of bending an image. It can be realized by a prism as shown in the figure or a simple reflection mirror. It is desirable to ensure the surface accuracy of the surface through which the light passes so that the image is not distorted.
- the exit window 020 has a function of preventing dust and water droplets from entering from the outside. It is an optically transparent flat plate, and it is desirable to form an antireflection film in the red to blue region (wavelength range of 430 nm to 670 nm) so as to reduce the efficiency loss.
- the image projection device 011 is equipped with a light detection unit 021 and can detect light emitted from the light source 012.
- the light detection unit 021 is light detection with a color filter function capable of detecting light for each color.
- a photodetector that does not depend on the wavelength can be used for the light detection unit 021.
- the signal of the photodetector may be monitored in synchronization with the timing at which red, green, and blue are sequentially emitted by the FSC.
- the light detection unit 021 can be made cheaper than using a light detector with a color filter function.
- the light detection unit 021 stores an initial value of light emitted from the light source 012 to be set to a predetermined color temperature and brightness, and feedback control is performed when the amount of light changes due to temperature or deterioration over time. It is desirable to have a configuration that can be used.
- the light source 012 includes a red chip 031, a green chip 032, and a blue chip 033 that emit light in the red, green, and blue wavelength bands. This is a multi-chip light source mounted in one housing.
- the centers of the red chip 031, the green chip 032, and the blue chip 033 are preferably matched with the center of the incident / exit surface 002 (in the figure, the lines 034 and 035 have tolerances).
- the width W LED and the height H LED are 1 mm
- the width W and the height H may be set to about 1.1 mm if the mounting tolerance is ⁇ 0.05 mm.
- FIGS. 4A to 4C are schematic views of the display device 101, FIG. 4A is a front view, and FIGS. 4B and 4C are side views.
- the display device 101 is assumed to be a smartphone, a tablet PC, or the like, and includes a panel 102 for controlling the display device 101 with a finger using video display and electrostatic capacitance, a control button 103, and the like.
- a video projection device 011 is provided at the upper part in FIG. 4A of the display device 101, and a video can be projected in the upper part direction in FIG. 4A.
- the video projection device 011 has a rotation mechanism 104 that can rotate in the direction of the arrow 105 in the display device 101. As shown in side views of FIGS. 4B and 4C, the video projection direction is upward or backward. Can be selected.
- FIG. 5 illustrates a system block of the display device 101.
- the display device 101 includes a light projection (light detection unit) 021, a light source 012, and a video projection device 011 including a data table 120 in which setting values for controlling the light source are stored.
- the communication unit 112 has a function of acquiring external information by accessing information on the Internet such as WiFi or Bluetooth (registered trademark) or an external server 119 such as an electronic device owned by the user 111. .
- the display device 101 includes a display unit 113 that displays information to the user 111 via the panel 102, an acceleration sensor that detects acceleration based on a principle such as an electric element or capacitance, and a sensing unit 114 that senses the external environment using a GPS or the like. It also has.
- the display device 101 also includes a power supply unit 115 that supplies power from a battery or the like, and an imaging unit 116 that acquires external images using a camera or the like.
- the display device 101 is also provided with a control unit 117 that allows the user to control the display device 101 by voice recognition of a user's words using a microphone, a touch sensor of the panel 102, a button 103, and the like.
- the display device 101 also includes a controller 118 which is a main chip for controlling the above-described devices and the above-described units in accordance with user control.
- the display device 101 includes an image projection device 011 that allows not only the user 111 to observe a predetermined image on the display unit 113 but also allows the user 111 and a plurality of other people to observe the image simultaneously.
- the controller 118 detects the location where the display device 101 is arranged, selects surrounding information from the external server 119, and drives the video projection device 011.
- the selected information may be displayed on the screen.
- the controller 118 confirms the image data list held by the user 111 on the display unit 113 by the user 111 and displays only the image selected by the user 111 on the screen by the video projection device 011.
- the user may have a function of allowing other people to observe the video.
- the controller 118 processes the video signal acquired by the video information of the imaging unit 116, and the controller 118 has the step. And a function of notifying the user 111 of information such as “attention to level difference” by causing the video projection device 011 to emit light.
- the power supply unit 115 supplies necessary power to the apparatus via the controller 118. At this time, it is desirable that the controller 118 has a function of saving power by supplying power only to necessary devices according to necessity.
- controller 118 desirably has a function of monitoring light amount information from the light detection unit 021 in the video projection device 011 and controlling the output of the light source 012.
- the light amounts 00 (R), I0 (G), I0 ( B) is stored in the data table 120.
- the video projection device 011 When receiving a command for image projection of the video projection device 011 from the controller 118, the video projection device 011 starts to emit light from the light source 012 (131 in FIG. 6A). Next, the light detection unit 021 detects the light amounts I1 (R), I1 (G), and I1 (B) of the light source 012 (132 in FIG. 6A). Is there any error from the specified color coordinates by comparing the detected light amounts I1 (R), I1 (G), I1 (B) with the initial light amounts I0 (R), I0 (G), I0 (B)? Check (133 in FIG. 6A). As long as the video projection device 011 is in operation, if there is no color coordinate error, a predetermined time is left (135 in FIG. 6A), and the light amount is detected again by the light detection unit 021 (132 in FIG. 6A). Repeat the adjustment flow.
- a semiconductor light source such as an LED has a characteristic that its output changes depending on the temperature. For this reason, the light output of each color emitted from the light source 012 changes due to the temperature change of the environment or the heat generation of the electronic circuit disposed in the vicinity of the light source 012.
- the light amounts of the red chip 031, the green chip 032, and the blue chip 033 in the light source 012 are controlled so that the error is corrected (134 in FIG. 6A).
- the control of the amount of light can be realized by a method of changing the drive current or a method of changing the light emission time.
- the light amount is detected again (132 in FIG. 6A), and it is checked whether the color is a predetermined color (133 in FIG. 6A).
- the video projection device 011 be feedback controlled so that the color coordinates do not exceed a certain range.
- the optical integrator 001 is a resin. For this reason, it is assumed that the transmittance is deteriorated due to deterioration with the passage of time or ultraviolet rays. In addition, it is assumed that the amount of light emitted by the light source 012 deteriorates with time and the light amount itself is reduced.
- the video projection device 011 In response to a command for image projection of the video projection device 011 from the controller 118, the video projection device 011 starts to emit light from the light source 012 as shown in FIG. 6B (131 in FIG. 6B).
- the light detection unit 021 detects the light amounts I2 (R), I2 (G), and I2 (B) of the light source 012 (140 in FIG. 6B).
- the addition value IT2 of the detected light amounts I2 (R), I2 (G), and I2 (B) is compared with the initial addition value IT0 of the light amounts I0 (R), I0 (G), and I0 (B) (FIG. 6B). 141).
- the difference in the light amount is smaller than the predetermined set value, it is assumed that either the light source 012 or the photodetector has deteriorated, and the initial light amounts I0 (R), I0 (G), and I0 (B) are set as IT2.
- the setting of the initial light quantity is changed to the light quantity I0 (R), I0 (G), and I0 (B) according to the ratio of IT0, and the setting value of the data table 120 is updated (142 in FIG. 6B).
- the light detection unit 021 again detects the light amounts I2 (R), I2 (G), and I2 (B) of the light source 012 (140 in FIG. 6B).
- the addition value IT2 of the detected light amounts I2 (R), I2 (G), and I2 (B) is compared with the initial addition value IT0 of the light amounts I0 (R), I0 (G), and I0 (B) (FIG. 6B). 141).
- the light detection unit 021 detects the light amounts I3 (R), I3 (G), and I3 (B) (FIG. 6B). 132).
- the light amounts of the red chip 031, the green chip 032, and the blue chip 033 in the light source 012 are controlled so as to correct the error (134 in FIG. 6B).
- the light amount is detected again (132 in FIG. 6B) and it is checked whether the predetermined color coordinates are obtained (133 in FIG. 6B).
- the change in brightness due to deterioration with time can be corrected by checking only at the time of activation. Therefore, the flow of steps 132 and 135 in FIG. 6B may be repeatedly controlled except at the time of activation.
- the optical integrator 201 is an example in which the shape of the optical integrator 001 in FIG. 1 is changed from a quadrangular prism to a cylinder.
- the optical integrator 201 has a length L, a diameter W, and a cylindrical shape, and the inside thereof is filled with a medium 1 having a predetermined refractive index N1 with high transparency.
- the optical integrator 201 has incident / exit surfaces 202 and 203 and a TIR side surface 204.
- the inside of the optical integrator 201 is randomly filled with scattering particles 008 filled with a highly transparent medium 2 having a refractive index 2 different from that of the medium 1. Similar to the optical integrator 001, it has a function of scattering by changing the angle of the traveling light beam.
- the travel distance is strong and weak, so that good homogeneity cannot be obtained.
- the light integrator 201 is provided with scattering particles 008 therein, so that even if it has a cylindrical shape, there is no problem and color mixing and homogeneity can be obtained.
- the diameter W of the incident / exit surfaces 202 and 003 is preferably set to be at least twice as large as the area of the incident light beam in consideration of the mounting tolerance and the like than the incident light beam. This is because the luminance is inversely proportional to the area as described above.
- optical integrator 211 Next, the optical integrator 211 will be described with reference to FIG.
- the optical integrator 211 is an example in which the shape of the optical integrator 001 is changed from a quadrangular prism to a triangular prism.
- the optical integrator 211 has a triangular prism shape having a length L and a length W on one side, and the inside thereof is filled with a medium 1 having a predetermined refractive index N1 having a high transparency.
- optical integrator 211 has incident / exit surfaces 212 and 213 and TIR side surfaces 214 to 216.
- the inside of the optical integrator 211 is randomly filled with scattering particles 008 filled with a highly transparent medium 2 having a refractive index 2 different from that of the medium 1. Similar to the optical integrator 001, it has a function of scattering by changing the angle of the traveling light beam.
- the shape of the red chip 031, the green chip 032, and the blue chip 033 in the light source 012 is a triangular prism in accordance with a triangle shape as shown in FIG.
- the length W of the incident / exit surfaces 212 and 213 is preferably set to be larger than the area of the incident light beam and at least twice or less in consideration of the mounting tolerance of the incident light beam. This is because the luminance is inversely proportional to the area as described above.
- the space is wasted more than a square pole, thereby obtaining an effect of improving efficiency while ensuring color mixing and homogeneity.
- optical integrator 221 Next, the optical integrator 221 will be described with reference to FIG.
- the optical integrator 221 is an example in which the shape of the optical integrator 001 is changed to a curved shape.
- the optical integrator 221 has a curved shape having a length L, a width W, and a height H in the longitudinal direction, and the inside thereof is filled with a medium 1 having a predetermined refractive index N1 with high transparency.
- optical integrator 221 has incident / exit surfaces 222 and 223 and TIR side surfaces 224 to 227.
- the inside of the optical integrator 221 is randomly filled with scattering particles 008 filled with a highly transparent medium 2 having a refractive index 2 different from that of the medium 1. Similar to the optical integrator 001, it has a function of scattering by changing the angle of the traveling light beam.
- the optical integrator 221 is characterized in that the normal lines of the incident / exit surfaces 222 and 223 are different, and it is possible to easily bend between the light source 012 and the illumination lens 013 in mounting.
- optical integrator 231 will be described with reference to FIG.
- the light integrator 231 is an example in which the ratio of the light incident / exit surface of the light integrator 001 is changed.
- the optical integrator 231 has TIR side surfaces 234 to 237 of an entrance surface 232 and an exit surface 233.
- the inside is filled with a medium 1 having a predetermined high refractive index N1.
- the incident surface 232 is a square having a width Wi
- the exit surface 233 is a square having a width W0, and a length L.
- the incident surface 232 and the exit surface 233 are different in size.
- the inside of the optical integrator 231 is randomly filled with scattering particles 008 filled with a highly transparent medium 2 having a refractive index 2 different from that of the medium 1. Similar to the optical integrator 001, it has a function of scattering by changing the angle of the traveling light beam.
- the light quantity per solid angle is more efficient if the light source is smaller and the display area is larger, according to the Etendue relationship of the physical laws to be preserved.
- the optical integrator 231 is configured such that the incident surface 232 and the exit surface 233 have different sizes so that the entrance surface 232 is on the light source 012 side and the exit surface 233 is on the illumination lens 013 side. With this arrangement, the transmission efficiency from the illumination lens 013 to the display area 015 can be improved.
- FIG. 11A shows the optical integrator 201
- FIG. 11B shows the incident / exit surface 212 of the optical integrator 211
- FIG. 11C shows the incident / exit surface 222 of the optical integrator 221
- FIG. 11D shows the incident surface 232 of the optical integrator 231. It is an example used.
- red chip 031, the green chip 032, and the blue chip 033 are arranged in a triangle so that the cylindrical light integrator 201 is arranged inside the incident / exit surface 202, there is little waste and it is advantageous in terms of efficiency.
- optical integrator 211 if it is arranged in a triangle inside the input / output surface 212, there is little waste and it is advantageous in terms of efficiency.
- four red chips 031, two green chips 032, and four blue chips 033 can be arranged on the square incident / exit surface 222.
- the effect of improving the brightness can be expected by increasing the number of green chips that the human eye feels bright.
- the red chip 031, the green chip 032, and the blue chip 033 may be arranged in a row on the square incident surface 232 like the optical integrator 231.
- Currently available multi-chip light sources equipped with three-color chips include the above-described triangle arrangement and the one arranged in a row. Even in a single row as shown in FIG. 11D, the color mixing property and the homogeneity can be ensured by making the size of the incident surface 232 equal to or larger than the outermost shape of the chip. That is, the color mixing property and the homogeneity can be ensured by making the area of the incident / exit surface equal to or larger than the outermost shape of the chip regardless of the arrangement of the chips.
- the shape of the incident surface 232 is not a square as shown in FIG.
- FIG. 12 is a schematic diagram showing the video projection device 301.
- the video projection device 301 is an optical system that employs a virtual image system that projects a video image directly to the eye, such as a head-mounted display.
- the lens unit 302 has an incident surface 303, a beam split surface 304, a reflection lens 305, an exit surface 306, a transmission surface 307, and a reflection surface 308.
- the entrance surface 303, the exit surface 306, and the transmission surface 307 are transparent planes.
- the beam splitting surface has a light branching function that allows predetermined light to pass therethrough and reflects the rest. Such a light branching function can be realized by a dielectric multilayer film.
- the surface of the reflective lens surface 305 is a lens surface that is reflectively coated. There is an eye in the direction of the arrow of the optical path 022 on the upper surface in the drawing.
- the reflection surface 308 is a reflection surface provided so that light travels to the light detection unit 021.
- the reflecting lens surface 305 and the reflecting surface 308 can be generally realized by a dielectric multilayer film or a metal coating such as aluminum or silver alloy.
- the human recognizes the image in combination with the lens function of the eye. This is called a virtual image because an image is generated on a temporary screen combined with a lens function of a human eye, compared to a real image that looks at an image projected on a screen like a normal projector.
- the head-mounted display projects an image directly to the eyes, so the outside world can only be seen with the eyes through the lens unit 032.
- the emission surface 306 and the transmission surface 307 be surfaces with high optical transparency.
- an optical system employing a virtual image method used for a head mounted display can be realized in a small size.
- FIG. 13 is a schematic diagram showing the video projection device 331.
- the video projection device 331 is a modification of the video projection device 301, and is an optical system that employs a virtual image system that projects a video directly onto the eye, such as a head-mounted display.
- the image generation device 334 is assumed to be a reflective liquid crystal element.
- the light emitted from the illumination lens 013 enters the polarization beam splitter 333.
- the polarization beam splitter 333 is a general optical element that reflects predetermined polarized light and transmits polarized light orthogonal to the polarized light.
- the light beam reflected by the polarization beam splitter 333 travels to the light detection unit 021 and is used for monitoring the light amount.
- the light transmitted through the polarization beam splitter 333 is illuminated on the video generation device 334.
- the reflective liquid crystal element is assumed to be a liquid crystal without a color filter. For this reason, since the number of pixels can be reduced to 1/3 compared to a liquid crystal having a color filter, a high-resolution image can be realized.
- a display area 335 of the video generation device 334 indicates an area where video is generated. Colorization is realized by FSC technology that emits light in the red, green, and blue wavelength bands in the light source 012 every time.
- the display area 335 has a function of selecting a predetermined polarization for each pixel, which is either a vertical direction or a parallel direction. In the case of making it effective as an image, a polarization in a direction parallel to the polarization reflected by the polarization beam splitter 333 is selected.
- the light rays that are effective and invalid as the image reflected from the display area 335 are incident on the polarization beam splitter 333 again, and only the light rays that are effective as the image are reflected.
- Light rays effective as the reflected image travel to the lens unit 302 and are projected onto the eye as described above.
- the light shielding openings 016 and 017 are light shielding openings arranged so that extra light outside the display area 015 is not emitted.
- the reflective liquid crystal element can reduce the thickness of the liquid crystal layer, so that the polarization selection speed can be increased. For this reason, the effect of improving flickering called color break is obtained.
- FIG. 14 is a schematic diagram showing the video projection device 341.
- the video projection device 341 is a real image optical system used for a projector, and is different from the video projection device 011 in that the optical axis changing element 019 is deleted.
- the video projection device 341 has a completely straight configuration from the light source 012. The cost is advantageous in that the optical axis changing element 019 is deleted.
- FIG. 15A shows a display device 351 that uses the video projection device 301
- FIG. 15B shows a display device 353 that uses the video projection device 34
- FIG. 15C shows an outline of the display device 356 that uses the video projection device 341. is there.
- the display device 351 shown in FIG. 15A is a head mounted display.
- the display device 351 is mounted on the user's 111 head, and an image is projected onto the eyes of the user 111 from the image projection device 301 mounted inside the display device 351.
- the user can visually recognize a virtual image 352 that is an image floating in the air.
- the display device 353 shown in FIG. 15B is a pocket projector.
- An image 354 is projected onto the screen 355 from the image projection device 341 mounted inside the display device 353.
- the user 111 can visually recognize the video image displayed on the screen as a real image.
- the display device 356 shown in FIG. 15C is a head-up display.
- a video is projected from the video projection device 341 mounted inside the display device 356 to the virtual image generation unit 357.
- the virtual image generation unit 357 has a function of a beam splitter that transmits part of light and reflects the rest, and a curved surface structure, and also has a lens function of generating a virtual image by directly projecting an image on the eyes of the user 111. is doing.
- the user 111 can visually recognize the virtual image 352 that is a video floating in the air.
- Such a head-up display is expected to be applied to an assist function for a car driver, digital signage, and the like.
- Any display device is desired to be small and bright, and by using the optical integrator of the present invention, a small and bright image projection device can be realized.
- the optical integrator 001 has a rectangular column shape with a length of 4.15 mm, a height of 1.05 mm, and a width of 1.05 mm.
- the inside is filled with the medium 1 having a high refractive index of 1.49. Further, the inside of the optical integrator 001 is randomly filled with scattering particles 008 viewed in the medium 2 having a high refractive index of 1.59. The volume of the scattering particles is 0.5% with respect to the volume of the optical integrator 001.
- Hitachi Chemical 9501 (trade name) manufactured by Hitachi Chemical Co., Ltd. This is a urethane acrylate-based photo-curing resin.
- As the medium 2 Sekisui Plastics Co., Ltd.
- Techpolymer SSX-302ABE (trade name) is used. This is a fine particle made of a crosslinked polystyrene resin, which is a monodisperse particle having a spherical shape, an average diameter of 2 ⁇ m, and approximately 95% of the particles having a difference within 0.5 ⁇ m from the average diameter.
- the optical integrator was manufactured as follows. First, 0.5% of the total volume of fine particles is placed in a photo-curing resin and stirred for about 10 minutes with a stirring rod. Defoaming will occur sufficiently by allowing it to stand for 4 hours or more after stirring. By enclosing the bottom and side surfaces with a metal plate, a gap having a length of 50 mm, a width of 7 mm, and a depth of 1.05 mm is formed, a resin is poured therein, and a glass plate is covered from above. At this time, air should be prevented from entering inside. Thereafter, a UV lamp is irradiated through the glass to sufficiently cure the resin.
- the product is taken out and cut into a width of 1.05 mm and a length of 4.15 m with a dicer (DAC552, manufactured by DISCO Corporation).
- a dicer DAC552, manufactured by DISCO Corporation.
- the blade is fed in parallel to the length direction. This is to reduce the surface leakage in the optical axis direction of the side surface and reduce the light leakage from the optical integrator by causing processing lines of the dicer to occur along the length direction of the optical integrator. .
- the side surface is processed using a dicing blade with a particle size of # 5000, the rotational speed is 30,000 rpm, the cutting speed is 0.5 mm / s, and the light input / output surface is a particle size with a # 3000 dicing blade.
- the surface roughness in this example is the result of measuring the centerline average roughness Ra based on JIS B0601'1982.
- the cutting surface was divided into particles without the medium 2 protruding from the side surface. Further, the non-cutting side surface was embedded in the medium 1 without the medium 2 protruding from the side surface.
- an LED (LTRAM R8SF made by OSRAM) is used. Three LEDs of red, green, and blue are mounted on one LED, and an improvement in color reproducibility can be expected compared to a white LED.
- the LED is placed in close contact with the center of the incident surface of the optical integrator, the anode is shared, a resistor of 1 k ⁇ is connected between the ground and the red chip, and a 150 ⁇ resistor is applied to the blue chip, and a voltage of 2.7 V is applied to the LED.
- the light was emitted, and the front luminance, uniformity, and color mixing of the exit surface of the optical integrator were evaluated.
- CA-1500 (trade name) manufactured by Konica Minolta was used.
- the luminance, chromaticity x, and chromaticity y data were measured by 121 divisions of 11 divisions in the width direction and 11 divisions in the height direction, and the average luminance, Uniformity, and color mixing properties were calculated as follows.
- Average luminance average value of front luminance at 121 points of measurement
- Uniformity Minimum / maximum front brightness of 121 measurement points
- Color mixing Maximum / minimum chromaticity value of 121 measurement points
- average brightness 34,400 cd / m 2 Uniformity 90.7%
- chromaticity x The color mixing property was 0.020, and the color mixing property was 0.024, and the uniformity of light could be achieved while ensuring sufficient brightness.
- this invention is not limited to the above-mentioned Example, Various modifications are included.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of each embodiment.
- each of the above-described configurations may be configured such that a part or all of the configuration is configured by hardware, or is realized by executing a program by a processor.
- control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. In practice, it can be considered that almost all the components are connected to each other.
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Abstract
Description
L×Tan35°≧2×W・・・式(1)
また、TIR側面は、表面粗さを小さくすることが望ましい。TIR側面の表面粗さを小さくすることで反射側面からの漏れ光を低減し、高光量出力を可能とする。
まず、媒質1の材質として、光を伝搬する観点から透明性の高い材料が選択される。本実施例ではアクリル系の光硬化樹脂を使用するが、透明度の高い材料であれば特に限定はなく、例えば、エポキシ系の熱硬化性の樹脂やアクリルやポリカーボネイト等の熱可塑性樹脂や、ガラス等を使用してもよい。
媒質2は、媒質1中に、媒質1と異なる屈折率の粒子を混合させることによって効率良く得ることができる。媒質2の材質として、本実施例では、架橋ポリスチレン微粒子を使用するが、透明度の高い材料であれば、その他の材質のプラスチック粒子やガラス粒子等、他の材料を使用してもよい。
媒質2の粒径は、0.5μm以上、5μm以下であることが望ましい。これは、前述のように、粒径が小さいと光が散乱しすぎて光の取り出し効率が低下してしまい、粒径が大きいと光が散乱しにくいためである。また、粒径は略均一である方が望ましいが、90%以上の粒子が上記粒径範囲内に含まれていれば効果は得られるため問題ない。
媒質1と媒質2を一体化する工法としては、例えば液状の媒質1を用意し、次いで媒質1と媒質2を混合させ、それを所定の形状に光硬化させて製作する方法があるが、熱プレス、射出成形、削りだし等、他の工法でも製作可能である。中でも液状の媒質1を用いると、媒質2を容易に混合させることができるため、より好ましく、媒質1に媒質2を混合させた状態も液状であると、所定の形状に加工しやすいためさらに好ましい。
本実施例の光積分器の表面粗さ(Ra;算術平均粗さ)は、側面の長さ方向では小さくすることが望ましい。これは光が側面にあたったときに側面の長さ方向で面が荒れていると、臨界角を超えて光が側面から抜けてしまうためである。長さ方向に垂直な方向では、光の伝搬に悪影響のない範囲で面が荒れていてもよい。また光入射面や光出射面については、光の拡散が高まる効果が見込めるため、光の出射に悪影響のない範囲で面が荒れていてもよい。以上の観点から側面の光軸方向の表面粗さは0μm超~2.0μmであると良く、0μm超~1.0μmであるとより良く、0μm超~0.5μmであるとさらに良い。光入射面及び光出射面の表面粗さは、上記側面の表面粗さ以上であって、0.01μm~10μmであると良く、0.5μm~5μmであるとより良く、0.5μm~3μmであるとさらに良い。尚、側面の光軸に対して垂直方向の表面粗さは0μm超であって、上限は上述した光入射面及び光出射面の表面粗さで列挙した値以下であると良い。
光源012は、赤、緑、青の波長帯の光を出射する赤チップ031、緑チップ032、青チップ033が1個の筐体内に搭載されたマルチチップ光源である。
映像投射装置011が動作中である限り、色座標の誤差が無い場合は、所定の時間を置いて(図6Aの135)、再度、光検出部021で光量を検知する(図6Aの132)調整フローを繰り返す。
光量の差が所定の設定値より小さい場合は、光源012か光検出器のどちらかが劣化したものと想定し、初期の光量I0(R)、I0(G)、I0(B)をIT2とIT0の比率に応じて初期光量の設定を光量I0(R)、I0(G)、I0(B)に変更してデータテーブル120の設定値を更新する(図6Bの142)。
映像投射装置011が動作中である限り、色座標の誤差が無い場合は、所定の時間を置いて(図6Bの135)、再度、光検出部021で光量を検知する(図6Bの132)調整フローを繰り返す。
1/F=1/A+1/L・・・式(2)
平均輝度:測定121点の正面輝度の平均値
Uniformity:測定121点の正面輝度の最小値/最大値
混色性:測定121点の色度の最大値-最小値
測定の結果、平均輝度34,400cd/m2、Uniformity90.7%、色度xの混色性0.020色度yの混色性0.024であり、十分な明るさを確保したうえで光の均一化を達成できた。
002、003 入出射面
004~007 TIR側面
008 散乱粒子
011 映像投射装置
012 光源
014 映像生成装置
015 表示エリア
018 レンズユニット
019 出射窓
021 光検出部
022 光進路
101 表示装置
Claims (12)
- 光を拡散させる光積分器であって、
該光積分器は、光を入射する入射面と、前記光を出射する出射面と、前記入射面と前記出射面とをつなぐ側面を備え、
前記光積分器の内部は、屈折率N1の導光部材で満たされており、
該導光部材は、光を散乱させる前記屈折率N1とは異なる屈折率N2の散乱粒子を含有し、
前記入射面から入射した前記光は、前記入射面側から前記出射面方向へ前記導光部材の内部の前記散乱粒子で散乱されながら伝播し、
前記散乱された散乱光の一部は、前記側面で内面反射して前記出射面へと導光される光積分器。 - 前記入射面と前記出射面とが略平行に対向してなる請求項1に記載の光積分器。
- 前記入射面と前記出射面とが略同一形状である請求項1又は2に記載の光積分器。
- 前記側面が前記入射面と略垂直である請求項1~3のいずれかに記載の光積分器。
- 前記側面における光軸方向の表面粗さ(Ra)が、0<Ra≦0.5μmを満たす請求項1~4のいずれかに記載の光積分器。
- 前記側面における光軸方向の表面粗さ(Ra)が、前記散乱粒子の平均粒径の1/2以下である請求項1~5のいずれかに記載の光積分器。
- 前記側面における光軸方向の表面粗さ(Ra)が、前記側面における光軸と垂直方向の表面粗さ(Ra)よりも小さい請求項1~6のいずれかに記載の光積分器。
- 前記入射面の表面粗さ(Ra)及び/又は出射面の表面粗さ(Ra)が、前記側面における光軸方向の表面粗さ(Ra)より大きい請求項1~7のいずれかに記載の光積分器。
- 前記入射面と前記出射面間の前記側面の長さが、前記入射面及び前記出射面の最大径の3倍よりも長い請求項1~8のいずれかに記載の光積分器。
- 前記入射面に、2つ以上の発光点を有する光源からの光が入射される請求項1~9のいずれかに記載の光積分器。
- 前記入射面に、3つ以上の発光点を有する光源からの光が入射され、前記3つ以上の発光点のうち、任意の3つの発光点が、非同軸に配置される請求項10に記載の光積分器。
- 映像を外部に投射する映像投射装置であって、
少なくとも2個以上の発光点を有する光源と、
前記光源から出射した光が入射する請求項1~11のいずれか一項に記載の光積分器と、
映像を生成する映像生成装置と、
前記光積分器から出射する光を映像生成装置に照明するレンズ部と、
前記映像生成装置から出射した映像を外部に投射する投射部と、
を少なくとも備えた、映像投射装置。
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US15/513,498 US10303047B2 (en) | 2014-09-24 | 2015-09-07 | Optical integrator and video projection device using same |
KR1020177008110A KR102017398B1 (ko) | 2014-09-24 | 2015-09-07 | 광 적분기 및 그것을 사용한 영상 투사 장치 |
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Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10663652B2 (en) | 2011-12-30 | 2020-05-26 | Fraen Corporation | Light mixing systems with a glass light pipe |
US9995872B2 (en) | 2011-12-30 | 2018-06-12 | Fraen Corporation | Light mixing systems with a glass light pipe |
CN108603638A (zh) * | 2016-02-04 | 2018-09-28 | 日立化成株式会社 | 光混合器、以及使用其的多波长均质光源 |
JP2018186024A (ja) * | 2017-04-27 | 2018-11-22 | 日立化成株式会社 | 光混色照明装置 |
JPWO2018221579A1 (ja) * | 2017-05-30 | 2020-04-02 | 日立化成株式会社 | 光インテグレータホルダ及び光インテグレータユニット |
WO2019088124A1 (ja) * | 2017-10-30 | 2019-05-09 | 日立化成株式会社 | 光照射装置及び偏光光源用インテグレータ |
US10585292B2 (en) * | 2018-06-28 | 2020-03-10 | Fraen Corporation | Low-profile color-mixing lightpipe |
CN111694208B (zh) | 2019-03-14 | 2022-02-22 | 中强光电股份有限公司 | 投影装置 |
CN111239079B (zh) * | 2020-03-09 | 2022-11-11 | 上海交通大学 | 一种定光学深度的时变浑浊场模拟装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07198953A (ja) * | 1993-12-28 | 1995-08-01 | Yasuhiro Koike | 発光体 |
JP2001521199A (ja) * | 1997-10-24 | 2001-11-06 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 拡散光抽出による光導波管 |
WO2005098532A1 (ja) * | 2004-04-09 | 2005-10-20 | Matsushita Electric Industrial Co., Ltd. | レーザ画像表示装置 |
JP2007280793A (ja) * | 2006-04-07 | 2007-10-25 | Seiko Epson Corp | 照明装置及びプロジェクタ |
JP2012185369A (ja) * | 2011-03-07 | 2012-09-27 | Casio Comput Co Ltd | 光源装置及びプロジェクタ |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2134902C (en) * | 1994-04-07 | 2000-05-16 | Friedrich Bertignoll | Light diffusing apparatus |
JPH09166712A (ja) * | 1995-10-12 | 1997-06-24 | Kuraray Co Ltd | 導光体 |
JP2000131665A (ja) | 1998-10-29 | 2000-05-12 | Sony Corp | 投射型表示装置 |
AU2002951465A0 (en) * | 2002-09-18 | 2002-10-03 | Poly Optics Australia Pty Ltd | Light emitting device |
JP2004334083A (ja) | 2003-05-12 | 2004-11-25 | Plus Vision Corp | 半導体レーザ素子を光源に用いた照明光学系およびそれを利用したプロジェクタ |
JP2005353816A (ja) * | 2004-06-10 | 2005-12-22 | Olympus Corp | 発光デバイス、発光デバイスの製造方法、発光デバイスを用いた照明装置、及び、プロジェクタ |
KR100617197B1 (ko) | 2004-08-11 | 2006-08-31 | 엘지전자 주식회사 | 조명 장치 및 이를 이용한 프로젝션 디스플레이 장치 |
US8109666B2 (en) * | 2006-01-10 | 2012-02-07 | Rohm Co., Ltd. | Light guiding member and linear light source apparatus using same |
JP2009176725A (ja) * | 2007-12-25 | 2009-08-06 | Sumitomo Chemical Co Ltd | 面光源装置 |
TWI382245B (zh) * | 2008-08-28 | 2013-01-11 | Au Optronics Corp | 背光模組 |
JP5140531B2 (ja) | 2008-09-29 | 2013-02-06 | 日東電工株式会社 | 液晶表示装置 |
WO2010111310A2 (en) * | 2009-03-23 | 2010-09-30 | I2Ic Corporation | Linear light source with enhanced light extraction |
JP2012014933A (ja) * | 2010-06-30 | 2012-01-19 | Dainippon Printing Co Ltd | 導光板およびその製造方法、面光源装置ならびに液晶表示装置 |
JP2015531972A (ja) * | 2012-08-31 | 2015-11-05 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | 光拡散粒子を有する熱伝導シートに基づいた照明デバイス |
-
2014
- 2014-09-24 JP JP2014193285A patent/JP6579355B2/ja active Active
-
2015
- 2015-09-07 KR KR1020177008110A patent/KR102017398B1/ko active IP Right Grant
- 2015-09-07 WO PCT/JP2015/075304 patent/WO2016047426A1/ja active Application Filing
- 2015-09-07 CN CN201580051077.4A patent/CN107077052A/zh active Pending
- 2015-09-07 US US15/513,498 patent/US10303047B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07198953A (ja) * | 1993-12-28 | 1995-08-01 | Yasuhiro Koike | 発光体 |
JP2001521199A (ja) * | 1997-10-24 | 2001-11-06 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 拡散光抽出による光導波管 |
WO2005098532A1 (ja) * | 2004-04-09 | 2005-10-20 | Matsushita Electric Industrial Co., Ltd. | レーザ画像表示装置 |
JP2007280793A (ja) * | 2006-04-07 | 2007-10-25 | Seiko Epson Corp | 照明装置及びプロジェクタ |
JP2012185369A (ja) * | 2011-03-07 | 2012-09-27 | Casio Comput Co Ltd | 光源装置及びプロジェクタ |
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JP6579355B2 (ja) | 2019-09-25 |
US20170299955A1 (en) | 2017-10-19 |
KR20170047322A (ko) | 2017-05-04 |
CN107077052A (zh) | 2017-08-18 |
KR102017398B1 (ko) | 2019-09-02 |
JP2016065909A (ja) | 2016-04-28 |
US10303047B2 (en) | 2019-05-28 |
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