WO2004109389A1 - 照明装置及びこれを備えたプロジェクタ - Google Patents
照明装置及びこれを備えたプロジェクタ Download PDFInfo
- Publication number
- WO2004109389A1 WO2004109389A1 PCT/JP2004/008265 JP2004008265W WO2004109389A1 WO 2004109389 A1 WO2004109389 A1 WO 2004109389A1 JP 2004008265 W JP2004008265 W JP 2004008265W WO 2004109389 A1 WO2004109389 A1 WO 2004109389A1
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- WO
- WIPO (PCT)
- Prior art keywords
- reflector
- lighting device
- lens
- arc tube
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
- G02B27/1046—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/149—Beam splitting or combining systems operating by reflection only using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes
-
- 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
- G03B21/2026—Gas discharge type light sources, e.g. arcs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
Definitions
- the present invention, c relates to a lighting apparatus and a projector having the same
- Figure 5 shows a conventional reflector consisting of an ellipsoidal mirror (hereinafter referred to as “ellipsoidal reflector”).
- this lighting device includes an arc tube 1 OB that emits illumination light and a light source from the light tube 10 B.
- a light source lamp 10 having an elliptical reflector 10 OA for reflecting illumination light, and a collimating lens 16 for collimating illumination light from the elliptical reflector 1 OA of the light source lamp 10 are provided.
- reference numerals 20 and 30 denote lens arrays
- reference numeral 40 denotes a polarization conversion element.
- the illumination light emitted from the arc tube 1 OB is reflected by the elliptical reflector 1 OA, and further converted by the collimating lens 16 into substantially parallel light.
- the outer diameter of the light beam emitted from the collimating lens 16 can be made smaller than the outer diameter of the elliptical reflector, and the optical system in the subsequent stage can be made smaller accordingly. It can meet the recent demand for miniaturization of projectors. And, in view of the fact that it is becoming difficult to further reduce the size of the light source lamp due to the difficulty in downsizing the arc tube, this value is of great value.
- each optical element reduced in size by condensing a light beam by the elliptical reflector is arranged around the optical axis of the reflector. Therefore, the space obtained by miniaturizing each optical element exists so as to surround the periphery of each optical element, and it is not possible to obtain a sufficiently large space in any area.
- the thickness of the housing is reduced in order to make the projector thinner, relatively large components such as a circuit board and a power supply can be stored only in the space around each optical element described above. Because of the difficulty, it was not easy to make the projector thinner.
- an object of the present invention is to provide a lighting device which facilitates thinning of a projector and a projector provided with the lighting device.
- a lighting device includes: a light emitting tube that emits illumination light; a light source lamp having an elliptical reflector that reflects illumination light from the light emitting tube and emits the light in a certain direction; A illuminating device provided on an illumination area side for illuminating the illuminating light emitted from the reflector, wherein the reflector comprises: a first focal point disposed in a reflection surface of the reflector; A second focal point disposed outside a reflecting surface of the reflector, and a reflector central axis at which the first focal point and the second focal point are disposed; and the arc tube is configured such that the first focal point is the projecting light.
- the parallel illumination lens is disposed at a position deviated from the first focal point in a virtual plane orthogonal to the reflector central axis, the light emitting center being included in the tube, and the parallel lens is a lens parallel to the reflector central axis.
- the emission center of the arc tube is deflected with respect to the central axis of the reflector, and the lens optical axis of the parallel lens and the central axis of the reflector are deflected. Since the reference axis of each optical element is deviated from the central axis of the reflector, the reference axis of the optical element is located in a region opposite to the direction of deviation of each optical element downstream of the optical path from the parallel lens with respect to the central axis of the reflector. A large space can be obtained.
- a ratio a / of a deviation amount a of a lens optical axis of the parallel lens with respect to the central axis of the reflector and a deviation amount b of a light emission center of the arc tube with respect to the central axis of the reflector is defined as a / b is the ratio of the optical distance from the point where the ellipsoidal surface of the reflector intersects the central axis of the reflector to the first focal point ⁇ 1 and the optical distance from the point to the second focal point f 2 ⁇ 2 / f 1 It is preferable that the ratio is set to be equal to
- the ratio a Z b of the deviation amount b of the light emission center of the arc tube with respect to the reflector central axis and the deviation amount a of the lens optical axis of the parallel lens with respect to the reflector central axis is represented by an ellipse of the reflector. Since these parameters are set according to the ratio f2Zf1 of the optical distance f1 from the point where the surface intersects the central axis of the reflector to the first focal point and the optical distance f2 to the second focal point, these parameters can be easily set. And the design of the apparatus can be simplified.
- an end of the reflector and an end of the parallelizing lens in a direction opposite to a direction in which a light emission center of the arc tube deviates from the first focal point of the reflector are the reflector. It is preferable that they are arranged on the same virtual line parallel to the central axis.
- a light emission center of the arc tube and a lens optical axis of the collimating lens are arranged at positions deviated in a vertical direction perpendicular to the reflector central axis.
- the area in the direction opposite to the direction of deviation of each optical element in the subsequent stage of the optical path is wider than that of the parallelizing lens with respect to the central axis of the reflector. It is possible to arrange relatively large components more efficiently, and it is possible to further reduce the thickness of the projector.
- the luminous center of the arc tube and the lens optical axis of the collimating lens are arranged at positions deviated in the horizontal direction parallel to the central axis of the reflector. Is preferred.
- a sufficiently large space can be obtained in a single area in any one of the left and right directions parallel to the optical axis of the reflector. This makes it possible to optimally and efficiently dispose relatively large components such as a projector, thereby making it possible to further reduce the size and size of a single-layer projector.
- the projector according to the present asperity is a projector that modulates illumination light emitted from a lighting device in accordance with image information to form an optical image, and performs enlarged projection, wherein the lighting device is any one of the above.
- the projector of the present invention it is possible to configure a projector that enjoys the same functions and effects as described above.
- the reference axis of each optical element downstream of the parallel optical lens from the parallel lens becomes the central axis of the reflector. Therefore, a space can be obtained in a region in the direction opposite to the direction of deviation of each optical element in the subsequent stage of the optical path from the parallelizing lens with respect to the central axis of the reflector.
- the optical component in the latter stage of the optical path of the parallel lens is arranged at a position where the efficiency of collecting the reflected light by the reflector is maximized.
- an optical system in which a light emission center of an arc tube and a reference axis of an optical component following the lens optical axis of a parallelizing lens are arranged at positions deviated in a direction orthogonal to the central axis of the reflector. The utilization efficiency of the illumination light is maximized.
- FIG. 2 is a side view showing the lighting device according to the first embodiment of the present invention.
- FIG. 3 is a side view showing a lighting device according to Embodiment 2 of the present invention. .
- FIG. 4 is an explanatory diagram showing an optical component housing according to Embodiment 3 of the present invention.
- FIG. 5 is an explanatory diagram showing a conventional lighting device using an elliptical reflector.
- Embodiment 1 of the present invention will be described with reference to FIGS.
- FIG. 1 is an explanatory diagram showing an optical system of a projector according to Embodiment 1 of the present invention.
- Figure 1
- FIG. 1 (b) is a side view.
- the projector denoted by reference numeral 1 includes a lighting device 100, a color separation optical system 200, a relay optical system 300, an optical device 400, and a cross dichroic. It has a prism 500 and a projection optical system (not shown). The components of each optical system are arranged substantially horizontally around the cross dichroic prism 500.
- the optical elements constituting the optical systems 100 to 300 are positioned and adjusted and housed in an optical component housing in which a predetermined reference axis L is set.
- the lighting device 100 includes a light source lamp 110, a parallel lens 1116, a first lens array 120, a second lens array 130, and a polarization conversion element 140. , And a superimposing lens 150.
- the light source lamp 110 includes a reflector 11 OA, an arc tube 110 B, and a sub-reflector 1 provided on the opposite side of the reflector 11 OA across the arc tube 110 B. 10 ° C.
- the reflector 110A is an ellipsoidal mirror that is open toward the illuminated area and has a spheroid symmetrical to the central axis ⁇ C of the reflector.
- a reflector 110A1 is formed in the reflector 110A.
- the first focal point P1 of the reflector 110A is located within the reflecting surface 11OA1 of the reflector 11OA, and the second focal point P2 thereof is located outside the reflector 11OA.
- the first focal point P1 and the second focal point P2 are defined by the rotation of the reflecting surface 11A of the reflector 11OA1A1 Indicates the focus of the ellipse on the ellipsoid.
- the collimating lens 116 collimates the light beam emitted from the arc tube 11 OB and reflected by the reflector 11 OA and emitted as convergent light.
- the first lens array 120 is an optical splitting element that splits a light beam emitted from the parallel beam lens 116 into a plurality of partial light beams, and a plurality of light beams that are arranged in a matrix in a plane orthogonal to the reference axis L.
- Each of the small lenses has a contour similar to the shape of the image forming area of the liquid crystal display device 40 OR, 400 G, or 400 B constituting the optical device 400 described later. Is set to
- the second lens array 130 is an optical element that collects a plurality of partial luminous fluxes divided by the first lens array 120 described above together with the superimposing lens 150, and is similar to the first lens array 120. It is formed by arranging small lenses in a matrix in a plane perpendicular to the reference axis L. Note that since the second lens array 130 is for focusing, it is not necessary that the contour shape of each small lens correspond to the shape of the image forming area of the liquid crystal display devices 400R, 400G, and 400B.
- the polarization conversion element 140 has a function of aligning the polarization directions of the respective partial light beams split by the first lens array 120 with the polarization directions usable in the liquid crystal display devices 40OR, 40OG, and 400B. .
- the superimposing lens 150 condenses a plurality of partial luminous fluxes that have passed through the first lens array 120, the second lens array 130, and the light conversion element 140 to form a liquid crystal display device 40OR, 400G, or 400B. This is an optical element that is superimposed on an illumination area that is a plane image formation area.
- the color separation optical system 200 includes a first dichroic mirror 210, a second dichroic mirror 220, and a reflection mirror 230, and converts illumination light emitted from the illumination device 100 into three colors of different wavelength ranges. It has the function of separating into illumination light.
- the first dike mouth mirror 210 reflects substantially blue light (hereinafter, referred to as “B light”), substantially green light (hereinafter, referred to as “G light”), and substantially red light (hereinafter, “R light”). It is called “light.”
- B light reflected by the first dichroic mirror 210 is further reflected by the reflection mirror 230, passes through the field lens 240B, and illuminates the B light liquid crystal display device 400B.
- the field lens 24 OB is provided to convert a plurality of partial light beams from the illumination device 100 into a light beam parallel to the reference axis L, and is arranged in front of the other liquid crystal display devices 40 OG and 400 R.
- the installed field lenses 240G and 350 have the same configuration as the field lens 240B.
- the G light of the G light and the R light transmitted through the first dichroic mirror 210 is reflected by the second dichroic mirror 220, passes through the field lens 240G, and illuminates the G light liquid crystal display device 400G. I do.
- the R light transmits through the second dichroic mirror 220, passes through the relay optical system 300, and illuminates the R light liquid crystal display device 400R.
- the relay optical system 300 includes an entrance-side lens 310, an entrance-side reflection mirror 320, a relay lens 330, and an exit-side reflection mirror 340.
- the R light emitted from the color separation optical system 200 is condensed by the entrance lens 310 and the relay lens 330, is bent by the entrance reflection mirror 320 and the exit reflection mirror 340, and is incident on the field lens 350. I do.
- the reason why such a relay optical system 300 is provided on the optical path of the R light is that the optical path length of the R light is longer than the optical path lengths of the other color lights, so that the light use efficiency is reduced due to divergence of the light.
- the luminous flux incident on the field lens 350 is set to be substantially equal to the luminous flux incident on the incident side lens 310.
- the relay optical system 300 is configured to transmit the R light of the three color lights, it may be configured to transmit the other color light such as the B light.
- the optical device 400 includes a liquid crystal display device 40 OR, 400G, and 400B for each color, and modulates the color light incident on each light incident surface according to the corresponding image information, and modulates the light.
- the emitted light is emitted as transmitted light.
- incident-side polarizing plates 918R, 918G, and 918B are arranged, respectively.
- Exit-side polarizing plates 920R, 920G, and 920B are disposed on the exit side of the liquid crystal display devices 400R, 400G, and 400B, respectively.
- LCD display 40 OR, 40 OG, 400B A transmission type liquid crystal display device is used.
- the liquid crystal display device 40 OR, 40 OG, 400 B is a device in which a liquid crystal, which is an electro-optical material, is hermetically sealed in a pair of transparent glass substrates.For example, a given image is obtained by using a polysilicon TFT as a switching element.
- the polarization direction of the polarized light flux emitted from the incident side polarizing plate 918R, 918G, 918B is modulated.
- the cross dichroic prism 500 has a function as a color synthesizing optical system that synthesizes the modulated light of each color emitted from the optical device 400.
- the cross dichroic prism 500 has a substantially square shape in plan view in which four right-angle prisms are bonded, and a dielectric multilayer film is formed in a substantially X-shape at an interface where the right-angle prisms are bonded.
- One of the substantially X-shaped interfaces is an R light reflecting dichroic surface 51 OR that reflects R light, and a dielectric multilayer film that reflects R light is formed, and the other substantially X-shaped interface reflects B light.
- B light reflecting dichroic surface 510B on which a dielectric multilayer film reflecting B light is formed.
- the modulated light of three colors is synthesized by the two reflecting dichroic surfaces 51 OR and 51 OB to generate synthesized light for displaying a color image.
- the combined light generated in the cross dichroic prism 500 is emitted toward a projection optical system (not shown).
- the projection optical system has a plurality of lenses, and is configured to enlarge and project the combined light emitted from the cross dichroic prism 500 on a screen (not shown) as a display image.
- FIG. 2 is a side view showing a lighting device 100 according to Embodiment 1 of the present invention.
- the lighting device 100 includes a light source lamp 110, a collimating lens 116, a first lens array 120, a second lens array 130, and a polarized light. It has a conversion element 140 and a superimposing lens 150.
- the light source lamp 110 includes an arc tube 110B, a reflector 110A that reflects a light beam emitted from the arc tube 110B and emits the light in a certain direction, and a reflector 1 sandwiching the arc tube 110B. It is roughly configured with a sub-reflector 110C provided on the opposite side of 1 OA.
- the arc tube 110B it is possible to adopt various arc tubes for high brightness having a glass tube 110B1 made of quartz glass that emits illumination light, such as a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a xenon lamp, and the like.
- a methanol halide lamp or the like can be used.
- the reflector 110A includes a reflecting surface 101A1 having an opening on the side of the illuminated area and having a reflector central axis OC parallel to the reference axis L and having a spheroidal shape.
- the first and second focal points P1 and P1 of the spheroidal surface are provided.
- P2 is located on the central axis OC of the reflector.
- the reflecting surface 101A1 is formed as a cold mirror that reflects visible light and transmits infrared light and ultraviolet light by vapor deposition of a metal thin film.
- the emission center Q of the arc tube 110B is disposed at a position that deviates upward from a first focal point P1 of the reflector 110 in a virtual plane perpendicular to the reflector center axis OC.
- the amount of deviation of the emission center 0 of the arc tube 1108 in the vertical direction with respect to the reflector center axis OC is set to the amount of deviation b (shown in FIG. 2).
- the sub-reflector 110C is a reflecting member that is disposed on the opposite side of the reflector 110A with the arc tube 110B interposed therebetween and covers substantially half of the front side of the arc tube 110B.
- the sub-reflector 11 OC is made of a low thermal expansion material and / or an inorganic material such as quartz, alumina ceramics or the like, which has a high thermal conductivity. It is a cold mirror like 11 OA.
- the luminous flux directly directed to the reflector 110A is reflected by the reflecting surface 110A1 of the reflector 110A and converges to the spot S. It becomes light.
- the luminous flux reflected by the sub-reflector 11 OC is directed to the reflector 11 OA and the reflecting surface 11 of the reflector 11 OA.
- the light is reflected again by OA1 and becomes convergent light converging to the spot S.
- the spot S where the luminous flux emitted from the light source lamp 110 converges has a direction opposite to the direction in which the emission center Q of the arc tube 11 OB is deviated from the first focal point P 2 of the reflector 11 OA.
- the reflector 11 1 OA is shifted with respect to the second focal point P 2.
- the collimating lens 116 is a concave lens having an optical axis on the reference axis L, is arranged on the illuminated area side of the light source lamp 110, and is configured to collimate the illumination light from the reflector 110A. ing.
- the reference axis L is the light emitting tube 11 OB with respect to the reflector center axis OC. It is arranged at a position that is deviated in the direction opposite to the direction of deviation of the center Q (downward in an imaginary plane perpendicular to the reflector central axis OC).
- the deviation of the reference axis L with respect to the reflector center axis OC is set so that the light flux emitted from the reflector 11 OA and converged on the spot S enters the collimating lens 116 (see FIG. 2). ) Is set to.
- the optical distance from the point O where the ellipsoidal surface of the reflector 110 A 1 1 0 A 1 intersects the central axis OC of the reflector to the first focal point P 1 is defined as the first focal length f 1, and the point O
- the optical distance from to the second focal point P 2 is the second focal length f 2
- the ratio a Z b to the quantity b is set to a ratio equal to the ratio f 2/11.
- the superimposing lens 150 is disposed with reference to the reference axis L.
- the reference axis L which is the center axis of the light beam behind the light path of the light source lamp 110, is deviated with respect to the reflector center axis OC
- the reference axis L extends from the opening end of the reflector 11OA.
- the area A on the opposite side to the direction in which the reference axis L is deviated with respect to the reflector center axis OC is the direction in which the area A is deviated from the reflector center axis OC of the reference axis L. It is wider than the area B on the side.
- the reference axis that is the center axis of the light beam behind the light path of the light source lamp 110 with respect to the reflector central axis OC Due to the bias of L, each optical element (parallel mirror) located downstream of the optical path from the collimating lens 1 16 in the virtual cylinder extending parallel to the reference axis L from the open end of the reflector 11 OA.
- Lens 1 16 lens array 120, 130, polarization conversion element 140, superposition lens 150, color separation optical system 200, relay optical system 300, optical device 400,
- the cross dichroic prism 500, etc. is offset and arranged in a region on the side of the reference axis L that is offset with respect to the central axis ⁇ C of the reflector, so that the reflector center axis of the reference axis L Obtain a wide space in the area A opposite to the direction deviating from OC Door can be. For this reason, relatively large components such as circuit boards and power supplies can be optimally and efficiently arranged by utilizing the wide space in the area A, and it is easy to reduce the overall thickness of the projector. Become. Further, in the lighting device 100 according to the first embodiment and the projector 1 including the same,
- the amount of deviation of the reference axis L with respect to the reflector center axis OC and the emission center of the arc tube 11 OB with respect to the reflector center axis OC are taken into consideration. It is necessary to determine the deviation b of Q, but the ratio a of the deviation b of the emission center Q of the arc tube 1 10B with respect to the reflector central axis OC and the deviation a of the reference axis L with respect to the reflector central axis OC ab Is set in accordance with the second focal length ⁇ 2 and the first focal length f1, so that these parameters can be easily determined and the design of the apparatus can be simplified.
- the two lens arrays 120, 130 and the polarization conversion element 140 are arranged at positions where the efficiency of collecting light reflected by the reflector is maximized. Thereby, in the lighting device 100 in which the arc tube 11 OB and the parallelizing lens 116 are arranged at positions deviated in the direction perpendicular to the reflector central axis OC, the utilization efficiency of the illumination light is maximized.
- FIG. 3 is a side view showing a lighting device 410 according to Embodiment 2 of the present invention.
- the same members as those in FIG. 2 are denoted by the same reference numerals, and detailed description will be omitted.
- the illumination device 410 includes a lower end which is an end of the reflector 11 OA in a direction opposite to a direction in which the light emission center Q is deviated with respect to the reflector center axis OC 1 and an end of the parallel lens 1 116 in the same direction. It is characterized in that the lower end, which is a part, is arranged on the same virtual line M parallel to the reflector central axis OC1.
- the arc tube 110B is housed in the reflector 11OA as in the first embodiment, includes the first focal point P1 in the glass tube 11OB1, and emits light from the arc tube 110B.
- the center Q is arranged at a position deviated upward from a first focal point P 1 of the reflector 110 in an imaginary plane perpendicular to the reflector center axis OC 1.
- the amount of deviation of the emission center Q of the arc tube 11 OB in the vertical direction with respect to the reflector center axis OC 1 is set to the amount of deviation b 1 (b l> b) as shown in FIG.
- the parallel lens 1116 is a concave lens having an optical axis on the reference axis L, and is disposed on the illuminated area side of the light source lamp 110 so as to collimate the illumination light from the reflector 110A. It is configured.
- the reference axis L is disposed at a position deviating in a direction opposite to the direction of deviation of the light emission center Q of the arc tube 11 OB with respect to the reflector center axis OC 1 (downward in an imaginary plane perpendicular to the reflector center axis OC 1). .
- the deviation of the reference axis L with respect to the reflector center axis OC 1 is determined as shown in FIG.
- the optical distance from the point O at which the ellipsoidal surface of the reflector 110A OA reflecting surface 1 10A1 intersects the central axis OC1 of the reflector to the first focal point P1 is the first focal length f1
- the point o is Assuming that the second focal length ⁇ 2 is the optical distance to the two focal points P 2, the deviation amount a 1 of the reference axis L with respect to the reflector central axis OC 1 and the light emitting center of the arc tube 11 OB with respect to the reflector central axis OC 1
- the ratio a 1 / b 1 of Q to the amount of deviation b 1 is set to a ratio equal to the ratio ⁇ 2 / f 1.
- the ratio al / b 1 between the deviation b 1 of the emission center Q of the arc tube 11 1 OB with respect to the reflector central axis OC 1 and the deviation a 1 of the reference axis L with respect to the reflector central axis OC 1 is a predetermined ratio f It is set according to 2 / f1.
- the reflector central axis OC is set such that the lower end of the reflector 11 OA and the lower end of the parallel lens 1116 are arranged on the same virtual line M parallel to the reflector central axis OC1.
- the deviation 1 of the emission center Q of the arc tube 11 OB with respect to the reflector center axis OC1 is determined, and the device design can be simplified as in the first embodiment.
- the projector 1 has a configuration in which the lower end of the reflector 11 OA and the lower end of the parallelizing lens 116 are on the same virtual line M parallel to the reflector center axis OC 1 in the present embodiment.
- the area B on the side of the reference axis L that is deviated from the reflector center axis OC 1 By making 1 smaller, the area A 1 on the side opposite to the direction in which the reference axis L is deviated from the reflector center axis OC 1 becomes wider, and a relatively large part is made using this wide area A 1.
- Circuit board, power supply, cooling fan, etc. Can be arranged. Thereby, the thickness of the projector can be further reduced.
- FIG. 4 is an explanatory view showing an optical component casing according to Embodiment 3 of the present invention.
- FIG. 4A is a partial cross-sectional view of the optical component housing of the projector 1 according to the third embodiment as viewed from the side
- FIG. 4B is a diagram illustrating the optical component housing of the projector 1A according to the comparative example.
- FIG. 4 is a partial cross-sectional view of the housing as viewed from the side.
- the optical system arranged in the optical component housing of the projector 1 according to the third embodiment includes an arc tube 110 B, similar to the first or second embodiment.
- the first focal point P 1 on the reflector reflecting surface side of the two first focal points P 1 and the second focal point P 2 located inside and outside the elliptical reflector 11 1 OA is included in the glass tube 11 1 OB 1 and is inside the reflector.
- the collimating lens 1 16 is disposed at a position deviated upward in an imaginary plane perpendicular to the central axis OC. That is, it is arranged at a position where the optical axis coincides with the reference axis L which is deflected downward and parallel to the reflector central axis OC.
- each optical element subsequent to the collimating lens 1 16 of the projector 1 according to the third embodiment is located inside the optical component housing, with respect to the center axis OC of the reflector 110 of the lighting device 100 and the arc tube 110 B with respect to the central axis OC.
- the light-emitting center Q is arranged so as to be deviated in a region on the opposite side to the deviation direction.
- the bottom surface of the optical component housing can be flattened, as is clear from the comparison with the comparative example in FIG. 4 (b).
- other relatively large parts circuit board, power supply, cooling fan, etc.
- the projector is also excellent in appearance.
- the reference axis L on which the light emission center Q of the arc tube 11 OB and the respective optical systems downstream of the parallelizing lens 1 16 are arranged based on the center axis OC or OC 1 The present invention is not limited to this.
- the light emitting center Q and the reference axis L are connected to the reflector central axis OC or Can also be placed in a position that is offset horizontally from OC 1 in the horizontal direction.
- the emission center Q of the arc tube 110B is arranged at a position deviated leftward horizontally with respect to the reflector center axis OC or OC1, the right center parallel to the reflector center axis OC or OC1 is required.
- a reference axis L coinciding with the optical axis of the collimating lens 1 16 is disposed at a position deviated in the direction.
- the deflection center Q is deviated to the left horizontally with respect to the reflector center axis OC or OC 1.
- a reference axis L coinciding with the optical axis of the collimating lens 1 16 is disposed at a position where the reference axis L coincides.
- the emission center Q of the arc tube 110B is disposed at a position deviated from the first focal point P1 in a virtual plane orthogonal to the reflector central axis OC or OC1, and the lens light of the collimating lens 116 is disposed.
- the reference axis L coinciding with the axis may be offset with respect to the reflector center axis OC or OC 1 in a direction opposite to the direction in which the emission center Q is offset with respect to the first focal point P 1.
- a sufficiently large space can be obtained not only in the vertical direction perpendicular to the reflector central axis OC or OC 1 but also in a single area in either horizontal horizontal direction. Therefore, relatively large components such as a circuit board and a power supply can be optimally and efficiently arranged in this space, and there is an effect that the size of the projector can be further reduced. .
- the horizontal direction indicates the planar direction of the projector 1
- the vertical direction indicates the thickness direction of the projector 1.
- the present invention is applied to the illumination device in which the sub-reflector 110 C is provided in the light source lamp 110, but the present invention is not limited to this, and the light source lamp without the sub-reflector
- the present invention may be applied to a lighting device including
- the present invention uses only one liquid crystal display device.
- the present invention is also applicable to a projector, a projector using two liquid crystal display devices, or a projector using four or more liquid crystal display devices.
- the transmission type liquid crystal display device in which the light incident surface and the light emission surface are different is used, but a reflection type liquid crystal display device in which the light incidence surface and the light emission surface are the same may be used.
- the lighting device of the present invention is used in the projector 1 including the liquid crystal display devices 400R, 400G, and 400B.
- the present invention is not limited to this.
- the light source device of the present invention may be adopted for a projector having a light modulation device. In this case, the polarizing plates on the light-incident side and the light-exit side can be omitted.
- the lighting device of the present invention is employed in the projector.
- the present invention is not limited to this, and the lighting device of the present invention may be applied to other optical devices.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005506854A JP4100430B2 (ja) | 2003-06-05 | 2004-06-07 | 照明装置及びこれを備えたプロジェクタ |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-160842 | 2003-06-05 | ||
| JP2003160842 | 2003-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004109389A1 true WO2004109389A1 (ja) | 2004-12-16 |
Family
ID=33508582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/008265 Ceased WO2004109389A1 (ja) | 2003-06-05 | 2004-06-07 | 照明装置及びこれを備えたプロジェクタ |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7021794B2 (ja) |
| JP (1) | JP4100430B2 (ja) |
| CN (1) | CN100504578C (ja) |
| WO (1) | WO2004109389A1 (ja) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2365431B1 (es) | 2010-03-23 | 2012-09-18 | Vicina Y Cadenas, S.A. | Dispositivo de conexionado de grilletes |
| JP7034803B2 (ja) * | 2018-03-30 | 2022-03-14 | 浜松ホトニクス株式会社 | 測距ユニット及び光照射装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02195319A (ja) * | 1989-01-24 | 1990-08-01 | Seiko Epson Corp | 集光光学系 |
| JPH10288757A (ja) * | 1997-02-13 | 1998-10-27 | Canon Inc | 照明装置及び投影装置 |
| JP2000347293A (ja) * | 1999-04-02 | 2000-12-15 | Seiko Epson Corp | 光源装置、および、これを備えた照明光学系ならびにプロジェクタ |
| JP2001109068A (ja) * | 1999-10-01 | 2001-04-20 | Nec Viewtechnology Ltd | プロジェクタ用光源装置 |
| JP2002350778A (ja) * | 2001-05-24 | 2002-12-04 | Seiko Epson Corp | 照明光学系及びこれを備えたプロジェクタ |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09120067A (ja) | 1995-10-25 | 1997-05-06 | A G Technol Kk | 光源装置及びその応用装置 |
| EP1139014A3 (en) * | 2000-03-31 | 2003-03-12 | Seiko Epson Corporation | Light source device, and illuminating optical system and projector including the same |
| CN1387068A (zh) * | 2001-05-18 | 2002-12-25 | 大亿科技股份有限公司 | 具有一球面反射镜的集光模组的显示装置 |
-
2004
- 2004-05-28 US US10/855,411 patent/US7021794B2/en not_active Expired - Fee Related
- 2004-06-07 WO PCT/JP2004/008265 patent/WO2004109389A1/ja not_active Ceased
- 2004-06-07 JP JP2005506854A patent/JP4100430B2/ja not_active Expired - Fee Related
- 2004-06-07 CN CNB2004800156315A patent/CN100504578C/zh not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02195319A (ja) * | 1989-01-24 | 1990-08-01 | Seiko Epson Corp | 集光光学系 |
| JPH10288757A (ja) * | 1997-02-13 | 1998-10-27 | Canon Inc | 照明装置及び投影装置 |
| JP2000347293A (ja) * | 1999-04-02 | 2000-12-15 | Seiko Epson Corp | 光源装置、および、これを備えた照明光学系ならびにプロジェクタ |
| JP2001109068A (ja) * | 1999-10-01 | 2001-04-20 | Nec Viewtechnology Ltd | プロジェクタ用光源装置 |
| JP2002350778A (ja) * | 2001-05-24 | 2002-12-04 | Seiko Epson Corp | 照明光学系及びこれを備えたプロジェクタ |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100504578C (zh) | 2009-06-24 |
| JPWO2004109389A1 (ja) | 2006-07-20 |
| CN1802601A (zh) | 2006-07-12 |
| JP4100430B2 (ja) | 2008-06-11 |
| US20050041429A1 (en) | 2005-02-24 |
| US7021794B2 (en) | 2006-04-04 |
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