WO2005019926A1 - 光学装置、およびプロジェクタ - Google Patents
光学装置、およびプロジェクタ Download PDFInfo
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- WO2005019926A1 WO2005019926A1 PCT/JP2004/012185 JP2004012185W WO2005019926A1 WO 2005019926 A1 WO2005019926 A1 WO 2005019926A1 JP 2004012185 W JP2004012185 W JP 2004012185W WO 2005019926 A1 WO2005019926 A1 WO 2005019926A1
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- Prior art keywords
- optical device
- light
- reinforcing member
- plate
- color
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Classifications
-
- 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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
-
- 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
- H04N9/317—Convergence or focusing systems
Definitions
- the present invention relates to an optical device and a projector.
- a color separation optical system that separates a light beam emitted from a light source into three color lights, three light modulators that modulate each color light according to image information, and a light modulator that is modulated by each light modulator.
- a three-plate projector including a color combining optical device for combining light beams.
- an optical device in which three light modulating devices are bonded and fixed to a color combining optical device is employed in order to reduce the size of the projector (for example, see Patent Document 1). .
- three light modulators are joined and fixed to a color combining optical device via a plurality of bin spacers.
- the light modulation device includes a light modulation element that performs light modulation, and a holding frame that has an opening corresponding to an image forming area of the light modulation element and houses the light modulation element. Be composed.
- a light modulation element that performs light modulation
- a holding frame that has an opening corresponding to an image forming area of the light modulation element and houses the light modulation element. Be composed.
- four holes are formed in the periphery of the opening in the holding frame.
- the four bin spacers are respectively passed through the four holes formed in the holding frame, and the end faces of the pin spacers are illuminated by the luminous flux of the color combining optical device.
- the three light modulators are bonded and fixed to the color synthesizing optical device by bonding and fixing to the incident end face and bonding and fixing the side surface of each bin spacer and the inner surface of each hole.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-221588
- the optical modulator is supported and fixed to the color combining optical device by a plurality of pin spacers.
- the pin spacer may be inclined, and the inclination of the bin spacer may cause the light modulation device to be displaced from the color combining optical device. But Therefore, the positions of the plurality of light modulation devices may be shifted from each other, and as a result, pixel shift may occur in the projected image.
- An optical device includes a plurality of light modulators that modulate a plurality of color lights in accordance with image information for each color light, and a color combined light that combines and emits each color light modulated by the light modulator.
- An optical device comprising: a colorimetric device; and a plurality of fixing members for respectively fixing the plurality of light modulators to each light beam incident end face of the color synthesizing optical device, wherein each light beam of the color synthesizing optical device is provided.
- a pedestal fixed to at least one of a pair of end faces intersecting the incident end face, and a plurality of reinforcing members disposed opposite to the respective side end faces of the plurality of light modulators;
- a supporting surface for supporting the plurality of reinforcing members, the plurality of reinforcing members supporting and fixing respective side end surfaces of the plurality of light modulation devices while being supported by the supporting surface; For each light beam incident end face of the color combining optical device The fixed state of the plurality of light modulators is reinforced.
- the present invention relates to, for example, an optical device in which a plurality of light modulators are fixed to respective light-incident end faces of a color combining optical device via a plurality of pin spacers as fixing members. Can be adopted. In addition to a plurality of pin spacers, other members are used as fixing members, and an optical device in which a plurality of light modulators are respectively fixed to each light beam incident end face of the color synthesizing optical device. Is also good.
- a fixing member such as a bin spacer.
- the configuration fixed to a member fixed to each light beam incident end face of the color combining optical device is also included.
- the supporting and fixing of the side end surface of the light modulation device by the reinforcing member is performed by a member or the like holding the light modulation device, which may be configured such that the reinforcing member directly supports and fixes the side end surface of the light modulation device.
- the light modulation device may be configured to support and fix the side end surface.
- the pedestal is formed with a support surface for supporting a plurality of reinforcing members, and the plurality of reinforcing members respectively support the side end surfaces of the plurality of light modulation devices while being supported by the support surface.
- the fixing Since the fixing is performed, the bonding state of the plurality of light modulating devices and the color synthesizing optical device by the fixing member such as the bin spacer can be enhanced. Therefore, even when an external force is applied to the optical device, it is possible to avoid the position shift of the light modulator with respect to the color combining optical device, to maintain the mutual positions of the plurality of light modulators in a favorable state, and to reduce the pixel shift. A good optical image without defects can be formed.
- the pedestal is provided with a support surface, it is possible to favorably maintain a state in which the reinforcing member supports and fixes the side end surface of the light modulation device. Therefore, even when the optical device is used for a long period of time, it is possible to prevent the state in which the reinforcing member supports and fixes the side end surface of the light modulation device.
- the pedestal includes a rectangular plate in a plan view, and four corners of the plate, a partial force, and a leg extending parallel to the plate surface of the plate.
- the leg portion is provided with a column projecting out of the plane of the leg portion, and a tip portion of the column is formed in a stepped shape and has the support surface for supporting the reinforcing member. Is preferred.
- the pedestal includes the plate and the leg, and the leg is provided with a support.
- the tip portion of the column is formed in a stepped shape and has a support surface for supporting the reinforcing member.
- the support surface has a shape that becomes wider toward the light beam incident side, and the reinforcing member is formed in a substantially triangular prism shape. Aside from being supported by the support surface, one of three substantially triangular prism-shaped outer surfaces supports and fixes the side end surface of the light modulation device, and the other one of the outer surfaces abuts on the support. Is preferred.
- the support surface has a shape that becomes wider toward the light beam incident side, and the reinforcing member is formed in a substantially triangular prism shape.
- the reinforcing member has a columnar end supported by the support surface, one outer surface supporting and fixing the side end surface of the optical modulator, and the other outer surface abutting on the support.
- This allows, for example, a photocurable adhesive between the columnar end and the support surface, between one outer surface and the side end surface of the light modulator, and between the other outer surface and the support.
- a thermosetting adhesive If the position of the light modulator is adjusted while the adhesive is not cured, the reinforcing member follows the movement of the light modulator due to the surface tension of the adhesive, and the position of the light modulator is adjusted.
- the light modulator can be easily fixed, and the light modulator can be firmly fixed to the color combining optical device.
- the pedestal is a rectangular plate in a plan view, and extends from four corners of the plate in parallel with the plate surface of the plate to support the reinforcing member.
- the legs of the pedestal serve as support surfaces for the reinforcing member.
- the reinforcing member has an end portion supported by the support surface, and has at least one of the outer surfaces including two opposing sides each having a substantially trapezoidal cross section and not having a parallel relationship.
- the reinforcing members disposed between the adjacent light modulators include the two sides facing each other, which do not have a substantially trapezoidal cross-sectional parallel relationship. Can be mutually supported and fixed, and the bonding state of multiple light modulators to the color combining optical device can be strengthened with a minimum number of reinforcing members.
- the pedestal includes a plate having a rectangular shape in a plan view and the support surface extending parallel to the plate from four corners of the plate and supporting the reinforcing member.
- the reinforcing member is formed of a rectangular plate-like body having opposing edges bent, and has a base located at a substantially central portion, and extending from the base in a substantially C-shaped cross section. And two end portions intersecting the opposite edge are supported by the support surface, and at least one of the two extension portions has It is preferable that the side end face of the optical modulator is supported and fixed.
- the legs of the pedestal serve as support surfaces for the reinforcing member.
- the reinforcing member has an end crossing the opposing edge supported by the support surface, and at least one of the two extending portions has a side facing the light modulation device. Support and fix the end face.
- the reinforcing members arranged between the adjacent light modulators can mutually support and fix the respective side end faces of the adjacent light modulators at the two extending portions, and the minimum number of the reinforcing members can be used.
- the bonding state of a plurality of light modulation devices to the color synthesis optical device can be enhanced.
- the reinforcing member can be formed by bending a rectangular plate, the manufacturing of the reinforcing member can be easily performed, and the manufacturing cost of the optical device can be reduced.
- light curing is performed between an end crossing an opposing edge and a leg, and between at least one of the two extending portions and a side end surface of the light modulation device.
- Apply mold adhesive or thermosetting adhesive If the position of the light modulator is adjusted in a state in which the adhesive is not cured, the reinforcing member follows the movement of the light modulator due to the surface tension of the adhesive, and after the position of the light modulator is adjusted, The light modulator can be easily fixed, and the fixing state of the light modulator to the color combining optical device can be strengthened.
- the plate body has a thickness dimension larger than a thickness dimension of the leg, a step is formed at a connection portion with the leg, and the reinforcing member has a cross section.
- the portion abuts on the step.
- a step portion is formed on the plate body, and the step portion has an outer surface including a shorter side of two sides of the reinforcing member having a substantially trapezoidal cross section in parallel, or The base of the reinforcing member abuts.
- the light modulation device includes a light modulation element that performs light modulation, and a holding frame that houses the light modulation element, wherein the holding frame, the reinforcing member, and the light source.
- the pedestal is made of a heat conductive material, and it is preferable that these members are bonded and fixed to each other with a heat conductive adhesive.
- the holding frame, the reinforcing member, and the pedestal constituting the light modulation device are made of a heat conductive material, and these members are bonded and fixed to each other with a heat conductive adhesive.
- the rigidity of the optical device can be enhanced, the heat transfer characteristics between the members can be improved, and the heat generated in the light modulating element constituting the light modulating device by irradiating the light beam can be held by the frame and the reinforcing member.
- a projector includes a light source, a color separation optical device that separates a light beam emitted from the light source into a plurality of color lights, the above-described optical device, and an optical image formed by the optical device. And a projection optical device for enlarging and projecting.
- the projector since the projector includes the above-described optical device, the same operation and effect as those of the above-described optical device can be obtained.
- the projector is provided with an optical device having enhanced rigidity, a clear image can always be projected by the projection optical device.
- FIG. 1 is a schematic diagram showing an optical system of a projector including an optical device according to a first embodiment.
- FIG. 2 is a diagram showing an optical device main body in the embodiment.
- FIG. 3 is a view showing a prism fixing plate in the embodiment.
- FIG. 4 is a view showing a prism fixing plate in the embodiment.
- FIG. 5 is a view showing a heat conductive member in the embodiment.
- FIG. 6 is a view showing a heat conductive member in the embodiment.
- FIG. 7 is a flowchart for explaining a method of manufacturing the optical device body according to the embodiment.
- FIG. 8 is an exploded perspective view showing a structure of a heat conductive member and a reinforcing member according to a second embodiment, and an arrangement state with a panel holding frame.
- FIG. 9 is an exploded perspective view showing a structure of a heat conductive member and a reinforcing member according to a third embodiment, and an arrangement state with a panel holding frame.
- FIG. 1 is a schematic diagram illustrating an optical system of a projector 1 including the optical device according to the present embodiment.
- Projector 1 modulates a light beam emitted from a light source according to image information, and performs enlarged projection on a projection surface such as a screen.
- the projector 1 includes an illumination optical system 100, a color separation optical system 200 as a color separation optical device, a relay optical system 300, three light modulation devices 400R, 400G, 400B, and a color combining device.
- An optical device 700 including a cross dichroic prism 500 as an optical device, and a projection optical system 600 as a projection optical device are provided.
- These optical components 100-300, 400R, 400G, 400B, 500, and 600 are housed in an optical component housing (not shown).
- the illumination optical system 100 is an optical system for making the luminous flux emitted from the light source uniform in the plane orthogonal to the illumination optical axis. As shown in FIG. 1, the illumination optical system 100 includes a light source 110, a first lens array 120, a second lens array 130, a polarization conversion element 140, and a superposition lens 150.
- the light source 110 is composed of a light source lamp and a reflector as a radiation light source, and the emitted radial light flux is reflected by the reflector to be a substantially parallel light flux. , Is injected outside.
- the light source lamp for example, a high-pressure mercury lamp, a metal halide lamp, a halogen lamp, or the like can be used.
- the reflector for example, a parabolic mirror or an ellipsoidal mirror can be adopted. When an ellipsoidal mirror is adopted, a configuration in which a parallelizing concave lens is arranged on the exit surface of the reflector is adopted.
- the first lens array 120 has a configuration in which small lenses having a substantially rectangular contour when viewed from the illumination optical axis direction are arranged in a matrix. Each small lens splits the light beam emitted from the light source 110 into partial light beams and emits the light beams in the direction of the illumination optical axis.
- the second lens array 130 has substantially the same configuration as the first lens array 120, and has a configuration in which small lenses are arranged in a matrix.
- the second lens array 130 has a function of forming an image of each / J ⁇ lens of the first lens array 120 on the image forming areas of the three light modulators 400R, 400G, and 400B, in addition to the superimposing lens 150.
- the polarization conversion element 140 converts the light beam emitted from the second lens array 130 into substantially one type of linearly-polarized light beam, thereby increasing the light use efficiency of the optical device 700. I have.
- each part of the light beam that has been converted into substantially one type of linearly polarized light beam by the polarization conversion element 140 is finally finally transferred to the image forming area of the light modulators 400R, 400G, and 400B by the superimposing lens 150.
- superimposed Since a projector using a liquid crystal panel that modulates polarized light can use only one type of polarized light, almost half of the light flux from the light source 110 that emits randomly polarized light is not used. For this reason, by using the polarization conversion element 140, the light flux emitted from the light source 110 is converted into substantially one type of polarized light, and the light use efficiency of the light modulators 400R, 400G, and 400B is increased.
- Such a polarization conversion element 140 is introduced in, for example, Japanese Patent Application Laid-Open No. H8-304739.
- the color separation optical system 200 includes two dichroic mirrors 210 and 220 and a reflection mirror 230.
- the plurality of partial light beams emitted from the illumination optical system 100 are separated into three color lights of red (R), green (G), and blue (B) by two dichroic mirrors 210 and 220.
- the relay optical system 300 includes an entrance lens 310, a relay lens 330, reflection mirrors 320 and 330, and a field lens 350.
- the relay optical system 300 has a function of guiding blue light, which is the color light separated by the color separation optical system 200, to the light modulator for blue light 400B.
- the dichroic mirror 210 of the color separation optical system 200 reflects the green light component and the blue light component and transmits the red light component of the light beam emitted from the illumination optical system 100.
- the red light transmitted by the dichroic mirror 210 is reflected by the reflection mirror 230, passes through the field lens 240R, and reaches the light modulator 400R for red light.
- the finale lens 240R converts each partial light beam emitted from the second lens array 120 into a light beam parallel to its central axis (principal ray). The same applies to the field lenses 240G and 350 provided on the light incident side of the other green light and blue light modulators 400G and 400B.
- the green light is reflected by the dichroic mirror 220, passes through the field lens 240G, and passes through the light for green light.
- the modulator reaches 400G.
- the blue light passes through the dichroic mirror 220, passes through the relay optical system 300, and reaches the light modulator 400B for blue light.
- the reason that the relay optical system 300 is used for blue light is that the optical path length of blue light is longer than the optical path length of other color lights, so that the light use efficiency is reduced due to light divergence and the like. This is to prevent That is, it is for transmitting the partial light beam incident on the incident side lens 310 to the field lens 350 as it is.
- the relay optical system 300 is configured to transmit the blue light of the three color lights, but is not limited thereto, and may be configured to transmit the red light, for example.
- the optical device 700 modulates the incident light beam according to image information to form a color image.
- This optical device 700 is disposed behind three incident-side polarizers 918R, 918G, and 918B, into which the respective color lights separated by the color separation optical system 200 are incident, and these incident-side polarizers 918R, 918G, and 918B.
- the optical modulators 400R, 400G, and 400B, the exit-side polarizing plates 92OR, 920G, and 920B, and the cross dichroic prism 500 are provided. Then, among these members, the light modulators 400R, 400G, 400B and the cross dichroic prism 500 are integrated to constitute an optical device main body 700A (see FIG. 2).
- the incident-side polarizing plates 918R, 918G, and 918B are disposed on the light-incident side of the optical device main body 700A and transmit only polarized light in a certain direction among the color lights passing through the color separation optical system 200. And a polarizing film that absorbs other light beams is attached to the substrate.
- These incident side polarizing plates 918R, 918G, and 918B are separate from the optical device main body 700A, but may be provided integrally on the light incident side of the optical device main body 700A.
- optical device main body 700A The detailed structure of the optical device main body 700A will be described later.
- the projection optical system 600 is arranged on the emission side of the optical device 700.
- the color image formed by the optical device 700 is configured to be displayed on a screen (projection surface) as a display image and displayed in an enlarged manner.
- FIG. 2 is a view showing the optical device main body 700A. Specifically, FIG. 2 (a) is a front view of the optical device body 700A, and FIG. 2 (b) is a plan view of the optical device body 700A, and FIG. Is a side view of the optical device main body 700A.
- the optical device main body 700A includes light modulators 400R, 400G, and 400B, a heat insulating pin 938 as a fixing member, a cross dichroic prism 500 (FIG. 2A), and an emission-side polarizing plate.
- 920R, 920G, 920B (Fig. 2 (a), Fig. 2 (b)), three heat conducting plates 935 (Fig. 2 (a), Fig. 2 (b)), pedestal 970, and six reinforcing members 937 (FIG. 2 (b) and FIG. 2 (c)).
- the optical device main body 700Af (these optical ports 400R, 400G, 400B, 500, 920R, 920G, 920B, 937, 938, 970) are physically united. It is configured.
- the light modulators 400R, 400G, and 400B include, for example, three transmission-type light modulators, and are arranged on the incident side of the cross dichroic prism 500 so as to correspond to each color light of RGB.
- the liquid crystal display generally includes a liquid crystal panel 400r and a panel holding frame 902.
- components such as a flexible substrate connected to and connected to the light modulators 400G and 400B are denoted by the same or equivalent symbols (differences in r, g, and b) as those of the light modulator 400R. I do.
- the liquid crystal panel 400r has two glass substrates (both not shown) facing each other via a liquid crystal layer (not shown), and is connected to a wiring flexible substrate 400r. Soshi
- the color light incident on each light incident surface is converted into light corresponding to the corresponding color signal (image signal), and the converted light is emitted as transmitted light.
- the panel holding frame 902 is attached to the light-incident end face of the cross dichroic prism 500 by four heat-insulating pins 938 to house and hold the liquid crystal panel 400r inside. It is configured as follows. And the whole is formed of a high heat conductive member such as an aluminum alloy. The corners of the panel holding frame 902 are provided with pin through holes 902al 902a4 through which the four heat insulating pins 938 respectively pass.
- the exit-side polarizing plates 920R, 920G, and 920B have substantially the same functions as the incident-side polarizing plates 918R, 918G, and 918B, and out of the light beams emitted from the light modulators 400R, 400G, and 400B, Transmits polarized light in one direction and absorbs other light beams.
- These exit-side polarizing plates 920R, 920G, and 920B are, as shown in FIG. 2A or FIG. 2B, a first exit-side polarizing plate 920R1 attached to the light-incident side end surface of the cross dichroic prism 500. , 920G1 and 920B1, and second exit-side polarizing plates 920R2, 920G2 and 920B2 supported and fixed to the heat conducting plate 935.
- the first exit side polarizing plates 920R1, 920G1, 920B1 and the second exit side polarizing plates 920R2, 920G2, 920B2 are configured to have different light absorption characteristics, and their respective polarization axes are parallel. It is arranged to become.
- the emission-side polarizing plates 920R, 920G, and 920B into a two-body configuration, compared with, for example, a case in which the emission-side polarization plates 92R, 920G, and 920B are configured as one body, the heat absorbed by the emission-side polarizing plates 92OR, 920G, and 920B Can be apportioned by two members, and thermal deterioration of the exit-side polarizing plates 920R, 920G, and 920B can be prevented.
- the first exit-side polarizers 920R1, 920G1, 920B1 and the second exit-side polarizers 920R2, 920G2, 920B2 are arranged so that their polarization axes are parallel to each other, and the incident-side polarizers 918R, They are arranged so as to be substantially orthogonal to the polarization axes of 918G and 918B.
- the heat conduction plate 935 is formed in a substantially rectangular shape by processing a flat plate of aluminum into a sheet metal, and has a first injection portion attached to the cross dichroic prism 500 at a substantially central portion in plan view.
- An opening (not shown) is formed to allow the side polarizing plates 920R1, 920G1, and 920B1 to be fitted, and a protrusion 935A (FIG. 2 (a) FIG. 2 (b)) is formed.
- the heat conducting plate 935 supports and fixes the second emission-side polarizing plates 920R2, 920G2, and 920B2 with the protrusions 935A, and the first emission-side polarizing plates 920R1 and 920G1 that are attached to the cross dichroic prism 500.
- 920B1 so as to be able to transfer heat, and is fixed to the side surface of the base 970 at the upper and lower ends via an elastic member (not shown) having thermal conductivity.
- the heat conductive plate 935 may be made of an electric zinc plated steel plate or the like in addition to aluminum, and may be made of synthetic resin formed by injection molding or the like, or made of iron or nickel such as invar. It may be composed of a molded product such as an alloy, a Mg alloy, and an A1 alloy. As shown in FIG. 2, the heat insulating pin 938 has a substantially cylindrical shape, and is made of a synthetic resin (acrylic material) that transmits ultraviolet light.
- the heat-insulating pin 938 is inserted into the pin insertion 902al-902a4 of the non-slip holding frame 902 in the light modulation devices 400R, 40OG, and 400B, and one end is fixed to the light-incident end face of the heat conduction plate 935.
- the light modulators 400R, 400G, and 400B are supported and fixed to the heat conducting plate 935.
- the heat insulating pin 938 is not limited to an acrylic material, and may be made of another synthetic resin that transmits ultraviolet light.
- the heat insulating pin 938 may be made of optical glass, crystal, sapphire, quartz, fluorite, or the like. It may be configured.
- the number of heat insulating pins 938 is not limited to four, but may be two or more. In this case, the number of the pin through holes 902al and 902a4 of the panel holding frame 902 in the light modulators 400R, 400G, and 400B is also the same as the number of the heat insulating pins 938 (corresponding to this).
- the cross dichroic prism 500 forms a color image by synthesizing optical images emitted from the exit-side polarizing plates 920R, 920G, and 920, and modulated for each color light.
- the cross dichroic prism 500 includes a dielectric multilayer 510R (FIG. 1) that reflects red light and a dielectric multilayer 510B (FIG. 1) that reflects blue light along the interface between the four right-angle prisms.
- the dielectric multilayer films 510R and 510B combine light of three colors in a substantially X-shape.
- the pedestal 970 is fixed to the upper and lower surfaces of the cross dichroic prism 500 (a pair of end surfaces orthogonal to the light beam incident end surface). As shown in FIG. 2, the pedestal 970 has a substantially rectangular parallelepiped upper pedestal 960 fixed to the upper surface of the cross dichroic prism 500, a prism fixing plate 950 for supporting and fixing the lower surface of the cross dichroic prism 500, A heat conductive member 940 connected to the prism fixing plate 950 and supporting and fixing the entire optical device body 700 is provided.
- FIGS. 3 and 4 are views showing the prism fixing plate 950.
- FIG. 3 (a) is a perspective view of the prism fixing plate 950 as viewed from above
- FIG. 3 (b) is a perspective view of the prism fixing plate 950 as viewed from below
- FIG. 4A is a plan view of the prism fixing plate 950 as viewed from above
- FIG. 4B is a diagram of the prism fixing plate 950 as viewed from the side.
- the prism fixing plate 950 has a stepped surface 950A1 (FIGS. 3 (b) and 4 (b)) which comes into contact with a stepped surface of a heat conductive member 940 described later. And is fitted to a frame portion of the heat conductive member 940 which will be described later.
- a projection 950A projecting upward is formed on the upper end face of the prism fixing plate 950. This positions the cross dichroic prism 500 It is configured to be adjusted and attached to the upper end face of the prism fixing plate 950.
- a screw hole 950B1 for mounting the optical component housing (not shown) is provided.
- a positioning projection 950B2 protruding downward is provided at the lower end face corner of the prism fixing plate 950.
- FIG. 5 and FIG. 6 are diagrams showing the heat conductive member 940.
- FIG. 5 is a perspective view of the heat conductive member 940 viewed from above.
- 6 (a) is a plan view of the heat conductive member 940, and
- FIG. 6 (b) is a side view of the heat conductive member 940.
- the heat conductive member 940 has a rectangular frame portion 940A that opens vertically and two pairs of legs 940B1 and 940B2 connected to the frame portion 940A.
- the frame portion 940A has a stepped surface 940A1 inside, and a prism fixing plate is provided on the stepped surface 940A1.
- the configuration is such that the prism fixing plate 950 is placed by abutting the stepped surface 950A1 of the 950.
- the frame 940A corresponds to a plate according to the present invention.
- the legs 940B1 and 940B2 have a support surface for supporting the reinforcing member 937.
- the support 940C has a substantially quadrangular prism shape, and is arranged so as to extend along the left and right edges of the panel holding frame 902 of the light modulators 400R, 400G, and 400B when the optical device main body 700A is assembled. You.
- a corner portion of the front end portion facing the side end surface of the panel holding frame 902 is formed in a stepped shape, and a support surface 940C1 for supporting the reinforcing member 937 is formed.
- the support surface 940C1 has a shape that becomes wider in accordance with the directional force on the light beam incident side.
- the base 970 described above is made of an aluminum alloy.
- the material of this pedestal 970 is limited to aluminum alloy.
- A1 Mg, Ti and their alloys, iron-nickel alloys such as invar and 42Ni_Fe, metals such as carbon steel, brass and stainless steel, or carbon fiber, carbon nanotube, etc. (Polycarbonate, polyphenylene sulfide, liquid crystal resin, etc.) mixed with the above carbon filler may be used.
- the reinforcing member 937 is a triangular spacer made of an aluminum alloy and formed in a triangular prism shape, and has a substantially right triangular cross section.
- the reinforcing member 937 is supported by the support surface 940C1 of the column 940C in the heat conductive member 940, and a side surface including a hypotenuse of a substantially right-angled triangle cross section faces the side surface of the column 940C, and has a substantially right-angled triangle shape.
- the side surface including the other side faces the side end surface of the panel holding frame 902.
- An ultraviolet-curing adhesive having thermal conductivity is applied between the reinforcing member 937 and the support surface 940C1 of the column 940C, the side surface of the column 940C, and the side end surface of the panel holding frame 902. Thereby, panel holding frame 902 is fixed to column 940C so as to be able to conduct heat.
- the constituent material of the reinforcing member 937 is not limited to the aluminum alloy.
- Al, Mg, Ti which are lightweight and have good thermal conductivity, and alloys thereof, Invar, and 42Ni — Metals such as iron and iron alloys such as Fe, carbon steel, brass, and stainless steel, or resins mixed with carbon fillers such as carbon fiber and carbon nanotubes (polycarbonate, polyphenylene sulfide, liquid crystal resin, etc.) Further, a rubber member having thermal conductivity may be used.
- FIG. 7 is a flowchart for explaining a method of manufacturing the optical device main body 700A. It is assumed that each liquid crystal panel is fixed in each panel holding frame 902. First, the cross dichroic prism 500 is fixed to the prism fixing plate 950 mounted on the heat conductive member 940 (process S1).
- the heat conductive member 940 to which the prism fixing plate 950 is attached is installed at a predetermined position, and an ultraviolet curable adhesive is applied to the protrusion 950A of the prism fixing plate 950. Then, using a prism position adjusting jig (not shown), the cross dichroic prism 500 is placed on the protrusion 95OA to which the adhesive has been applied. The position of the cross dichroic prism 500 is adjusted using a prism position adjusting jig (not shown).
- a white laser beam is applied to the end faces of the cross dichroic prism
- the position of the cross dichroic prism 500 with respect to the prism fixing plate 950 may be adjusted based on the light beam emitted from the light emitting side end surface.
- an image of the upper surface of the cross dichroic prism 500 is taken, and the position of the cross dichroic prism 500 is adjusted with respect to the prism fixing plate 950 based on the image of the upper surface of the cross dichroic prism 500 taken. I'm sorry.
- the ultraviolet curable adhesive filled between the lower surface of the cross dichroic prism 500 and the protrusion 950A of the prism fixing plate 950 is irradiated with ultraviolet light to be cured.
- the exit-side polarizing plates 920R, 920G, and 920B are fixed to the cross dichroic prism 500 (process S2).
- the first exit-side polarizing plates 920R1, 920G1, and 920B1 are bonded and fixed at predetermined positions on the light-incident side end surface of the cross dichroic prism 500. Further, the upper pedestal 960 of the pedestal 970 is bonded and fixed to the upper surface of the cross dichroic prism 500. Further, the heat conducting plate 935 supporting and fixing the second exit side polarizing plates 920R2, 920G2, 920B2 is fitted so that the first exit side polarizing plates 920R1, 920G1, 920B1 are fitted into openings (not shown) of the heat conducting plate 935. It is arranged and bonded and fixed to the side surface of the base 970 via an elastic member having thermal conductivity.
- the light modulators 400R, 400G, 400B and the heat insulating pins 938 are installed for the unit integrated in the process S2 (process S3).
- an ultraviolet-curable adhesive is applied to both ends (adhered portions) of the heat-insulating pins 938 on the incident and emission sides.
- the heat-insulating pin 938 is inserted into the pin insertion hole 902al-902a4 of the panel holder holding frame 902 from the incident side of the panel holding frame 902, and the emission-side end of the heat-insulating pin 938 contacts the light-incident end face of the heat conducting plate 935. Let it.
- the heat insulating pin 938 abuts on the light-incident side end surface of the heat conductive plate 935, the heat insulating pin 938 is interposed between the heat conductive plate 935 and the light modulation devices 400R, 400G, and 400B.
- the reinforcing member 937 is installed on the unit integrated in the process S3 (process S4).
- one end of the reinforcing member 937, a side surface including a hypotenuse of a substantially right triangular cross section, and a side surface including another side of a substantially right triangular cross section have purple. Apply an external curing adhesive.
- the reinforcing member 937 is attached to the support surface 940C1 of the support 940C of the heat conductive member 940 in a state where the side surfaces coated with the adhesive face the side surfaces of the support 940C and the side end surfaces of the panel holding frame 902, respectively. Place one end.
- the reinforcing member 937 is pressed from the light beam incident side to the light beam emitting side, and the side surface including the hypotenuse of the substantially right triangular cross section and the side surface including the other side of the substantially right triangular cross section of the reinforcing member 937 are provided. Abut on the side surface of the column 940C and the side end surface of the panel holding frame 902. In this case, the ultraviolet curable adhesive applied between the reinforcing member 937, the support 940C, and the panel holding frame 902 remains uncured.
- the alignment was adjusted using the joint surface between the light incident side end surface of the heat conducting plate 935 and the heat insulating pin 938 as a sliding surface.
- the joint surface between the outer surface of the heat insulating pin 938 and the inner surface of the pin hole 902al—a4 of the panel holding frame 9002 in the optical modulator 400G is used as a sliding surface, that is, light modulation is performed on the heat insulating pin 938. Focus adjustment is performed by sliding the device 400G.
- the alignment adjustment means that, when the optical axis direction of the projection optical system 600 is the Z direction, and two axes orthogonal thereto are the X and Y axes, the X axis direction, the Y axis direction, and the rotation in the XY plane are used. Adjustment of direction ((direction). Focus adjustment means adjustment of the rotation direction around the Z-axis, the X-axis (X-direction), and the rotation direction around the Y-axis ( ⁇ -direction).
- the ultraviolet curing adhesive applied between the light modulator 400G, the reinforcing member 937, and the heat conductive member 940 is irradiated with the ultraviolet light. Are simultaneously irradiated to fix these members (process S6).
- Step S7 The optical device main body 700A is manufactured according to the above procedure.
- the assembly of the optical device main body 700A does not necessarily have to be performed in the above order.
- the support surface 940C1 for supporting the six reinforcing members 937 is formed on the heat conducting member 940 constituting the pedestal 970. , 400G, and 400B are supported and fixed, respectively, so that the bonding state of the optical modulators 400R, 400G, 400B and the cross dichroic prism 500 by the heat insulating pins 938 can be enhanced. Therefore, even when an external force is applied to the optical device main body 700A, it is possible to avoid the positional shift of the light modulators 400R, 400G, and 400B with respect to the cross dichroic prism 500, and the light modulators 400R, 400G, The mutual position at 400B is maintained well, and a good optical image without pixel shift can be formed.
- the heat conductive member 940 includes a frame 940A and legs 940B1 and 940B2, and the legs 940Bl and 940B2 are provided with a column 940C.
- the tip of the column 940C is formed in a stepped shape and has a support surface 940C1 that supports the reinforcing member 937.
- the reinforcing member 937 supports and fixes the side end surfaces of the optical modulators 400R, 400G, and 400B, and furthermore, the reinforcing member 937 is formed in the stepped shape of the column 940C.
- the supporting surface 940C1 has a shape that becomes wider toward the light beam incident side, and the reinforcing member 937 is formed of a columnar member having a substantially right-angled triangular cross section. A reinforcing member 937 is easily installed between the support 940C and the side end surface of the panel holding frame 902 from the entrance side.
- the optical device body 700A can be easily manufactured.
- the reinforcing member 937 follows the movement of the light modulators 400R, 400G, and 400B due to the surface tension of the adhesive, adjusts the position of the light modulators 400R, 400G, and 400B, and irradiates with ultraviolet light to irradiate light.
- the position of the equipment 400R, 400G, 400B can be fixed easily and quickly.
- the panel holding frame 902, the reinforcing member 937, and the heat conductive member 940 are made of a heat conductive material such as aluminum, and a UV curable adhesive having heat conductivity is provided between these members.
- the rigidity of the optical device body 700A can be enhanced, the heat transfer characteristics between the members can be improved, and the heat generated in the light modulators 400R, 400G, and 400B by irradiating the light beam.
- the heat is dissipated through the heat transfer path of the panel holding frame 902—the reinforcing member 937—the heat conductive member 940, and the heat modulation of the light modulators 400R, 400G, and 400B can be prevented.
- the panel holding frame 902 Since the panel holding frame 902, the reinforcing member 937, and the heat conductive member 940 are made of the same material such as aluminum, the coefficient of thermal expansion becomes substantially the same, and the heat generated between the members becomes large. The stress can be reduced, and the joined state between the members can be favorably maintained.
- the projector 1 is equipped with the optical device 700A, which has enhanced rigidity and improved cooling efficiency of the light modulators 400R, 400G, and 400B, so that a clear image is always projected by the projection optical system 600. it can.
- the six reinforcing members 937 are formed of triangular spacers, and are supported by the columns 940C formed on the heat conductive member 940, while the side end faces of the panel holding frame 902 are provided. Support and fix.
- the second embodiment has a configuration in which the support 940C is omitted from the heat conductive member 940 ′.
- the reinforcing member 937 ′ is formed of four trapezoidal spacers having a substantially trapezoidal cross section, and supports and fixes the side end surface of the panel holding frame 902 while being supported by the heat conductive member 940 ′.
- the reinforcing members 937 'arranged between the P-contacting panel holding frames 902 support and fix the P-contacting panel holding frames 902 to each other.
- FIG. 8 is an exploded perspective view showing a structure of a heat conductive member 940 ′ and a reinforcing member 937 ′ in the second embodiment, and an arrangement state with a panel holding frame 902.
- a panel holding frame 902. for simplification of description, of the three panel holding frames 902, only the panel holding frame 902 on the green light incidence side is shown, and the panel holding frame 902 on the red and blue light incidence sides is omitted.
- the heat conductive member 940 ' is made of the same material as the heat conductive member 940 in the first embodiment, and has a frame portion 940A having a stepped surface 940A1 on which the prism fixing plate 950 is placed and fixed; A connecting portion 940D 'connected to the frame portion 940A and four legs 940B' are provided. Note that the frame portion 940A and the connecting portion 940D 'correspond to a plate according to the present invention.
- the connecting portion 940D ′ is a substantially rectangular plate connected to the outer surface of the frame portion 940A, and has a thickness smaller than the thickness of the frame portion 940A.
- the leg 940B ' is formed to extend outward from the four corners of the connecting portion 940D' along the connecting portion 940D ', and has a substantially trapezoidal shape in plan view.
- the upper surface of the leg 940B ' serves as a support surface 940C1' for supporting and fixing the reinforcing member 937 '.
- the reinforcing member 937 ' is made of the same material as the reinforcing member 937 of the first embodiment, is a trapezoidal spacer having a substantially trapezoidal cross section, and extends from one end to the vicinity of the other end.
- the inside has a hollow shape.
- This reinforcing member 937 ' has the other end supported by the support surface 940C1' of the leg 940B 'in the heat conductive member 940', and has two opposing sides that are not trapezoidal in cross section and have no parallel relationship. At least one of the two side faces including each faces the side end face of the panel holding frame 902.
- the reinforcing member 937 ′ disposed between the two adjacent panel holding frames 902 has a parallel trapezoidal shape having a substantially trapezoidal cross section. Two side surfaces each including two opposing sides having no engagement are opposed to side end surfaces of two adjacent panel holding frames 902, respectively. Then, between the reinforcing member 937 ′, the supporting surface 940 C 1 ′ of the leg portion 940 B ′ and the side end surface of the panel holding frame 902, a heat conductive ultraviolet curing adhesive is applied, and the reinforcing member 937 ′ is applied.
- the side end surface of the panel holding frame 902 is fixed to the heat conductive member 940' so as to be able to transfer heat, and the adjacent panel holding frames 902 are also fixed to each other by the reinforcing member 937 'so as to be able to transfer heat.
- the method of manufacturing the optical device main body 700A in the second embodiment can be performed in substantially the same manner as the manufacturing method of the first embodiment, and a description thereof will be omitted.
- the upper surface of the leg portion 940B 'of the heat conductive member 940' becomes the support surface 940C1 'of the reinforcing member 937', and the reinforcing member 937 'has the column member end supported by the support surface 940C1', Among the outer surfaces including two opposing sides each having a substantially trapezoidal shape and not having a parallel relationship, at least one of the outer surfaces supports and fixes the respective side end surfaces of the light modulators 400R, 400G, and 400B. As a result, the reinforcing members 937 'arranged between the adjacent panel holding frames 902 are connected to the adjacent panel holding frames at each outer surface including two opposing sides that do not have a parallel relationship of a substantially trapezoidal cross section.
- the side end faces of the 902 can be supported and fixed to each other. Therefore, the bonding state of the light modulators 400R, 400G, and 400B to the cross dichroic prism 500 can be strengthened by the minimum number of the four reinforcing members 937 '.
- the reinforcing member 937 ' is composed of a columnar member having a substantially trapezoidal cross section, and the inside is hollowed from one end to the vicinity of the other end. This makes it possible to reduce the weight of the reinforcing member 937 'and also reduce the weight of the optical device main body 700A while strengthening the bonding state of the light modulators 400R, 400G, and 400B to the cross dichroic prism 500.
- the same structures and the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted or simplified.
- the six reinforcing members 937 are formed of triangular spacers, and support and fix the side end surfaces of the panel holding frame 902 while being supported by the columns 940C formed on the heat conductive member 940.
- the heat conductive member 940 " has a configuration in which the support 940C is omitted.
- the reinforcing member 937" is a rectangular plate on which sheet metal processing is performed. And supporting and fixing the side end surface of the panel holding frame 902 while being supported by the heat conductive member 940 ".
- the reinforcing member 937" disposed between the adjacent panel holding frames 902 is made of P The supporting panel holding frames 902 are supported and fixed to each other.
- FIG. 9 is an exploded perspective view showing the structure of the heat conductive member 940 "and the reinforcing member 937" in the third embodiment, and the state of arrangement with the panel holding frame 902.
- FIG. 9 for simplification of description, only the panel holding frame 902 on the green light incident side of the three panel holding frames 902 is shown, and the panel holding frame 902 on the red and blue light incident sides is omitted. Te, ru
- the heat conductive member 940 is made of the same material as the heat conductive member 940 in the first embodiment, and has a frame portion 940A having a stepped surface 940A1 on which the prism fixing plate 950 is placed and fixed.
- a connecting portion 940D and four legs 940B" connected to the frame portion 940A are provided.
- the frame portion 940A and the connecting portion 940D “correspond to a plate according to the present invention.
- the connecting portion 940D is a substantially rectangular plate which is formed to be flush with the frame portion 940A and has a chamfered corner.
- the leg 940B is formed so as to extend outward from four corners of the connecting portion 940D" along the lower surface of the connecting portion 940D ", and has a substantially L-shape in plan view.
- the leg 940B has a thickness smaller than that of the connecting portion 940D", that is, the connecting portion 940D "has a step portion 940D1 at the connecting portion with the leg 940B".
- the upper surface of the leg 940B “serves as a support surface 940C1" for supporting and fixing the reinforcing member 937 ".
- the reinforcing member 937 is formed by sheet-metal processing of a rectangular flat plate of aluminum. Opposite edges are bent in the same direction, and the base portion 9 located substantially in the center portion is formed. 37A "and two extending portions 937B” extending from the base 937A “in a substantially C-shaped cross section, and have a so-called toyo-like shape.
- the reinforcing member 937" The supporting portion 940C1 "of the leg 940B" of the elastic member 940 "is supported, and the lower side of the base 937A" faces the step 940D1 "of the connecting portion 940D" and the two extending portions 937B ".
- At least one of the extending portions 937B faces the side end surface of the panel holding frame 902. That is, the reinforcing member 937 "disposed between the two panel holding frames 902 that are in P-contact is opposed to the U-shaped edges of the two panel holding frames 902 where the two extending portions 937B" are adjacent to each other. .
- a heat conductive ultraviolet curable type is provided between the reinforcing member 937 ", the support surface 940C1" of the leg 940B “, the step 940D1" of the connecting portion 940D “, and the panel holding frame 902.
- An adhesive is applied, and the side end surface of the panel holding frame 902 is fixed by the reinforcing member 937 "so that heat can be transmitted to the thermally conductive member 940", and the adjacent panel holding frames 902 are also connected to the reinforcing member 937 ". Is fixed so that heat can be transferred.
- the method of manufacturing the optical device main body 700A in the third embodiment can be implemented in substantially the same manner as the manufacturing method of the first embodiment, and a description thereof will be omitted.
- the reinforcing member 937 can be formed by bending a rectangular flat plate of aluminum or the like, the manufacturing of the reinforcing member 937" can be easily performed, and the manufacturing cost of the optical device 700 can be reduced. .
- the connecting portion 940D "of the heat conductive member 940" has a step 940D1 ", and the lower side of the base 937A" of the reinforcing member 937 "is fixed to the step 940D1". .
- the supporting state of the reinforcing member 937 "with respect to the heat conductive member 940” can be secured, and the bonding state of the light modulators 400R, 400G, and 400B to the cross dichroic prism 500 by the reinforcing member 937 "can be further enhanced.
- the heat conductive members 940, 940 ', 940 "and the reinforcing members 937, 937', 937” are connected to the cross dichroic prism 500 and the optical Adopted for the structure that joins the modulators 400R, 400G, and 400B, but is not limited to this, and is also used for the structure that joins the cross dichroic prism 500 and the light modulators 400R, 400G, and 400B using other fixing members It is possible.
- the light modulators 400R, 400G, and 400B are fixed to the cross dichroic prism 500 by the force fixed to the light-incident end face of the heat conducting plate 935 by the heat insulating pins 938.
- the heat conducting plate 935 may be omitted, and the optical modulators 400R, 400G, and 400B may be directly fixed to the respective light-incident end faces of the cross dichroic prism 500 via fixing members such as heat insulating pins 938. .
- the pedestal 970 is fixed to the upper and lower surfaces of the cross dichroic prism 500, but may be fixed to any one of the upper and lower surfaces.
- the heat conductive members 940, 940 ', 940 "and the prism fixing plate 950 are separate members.
- the present invention is not limited to this, and the heat conductive member is a block body that also serves as the prism fixing plate. In such a configuration, the number of components of the optical device can be reduced, and the entire device and the device assembling work can be simplified.
- the ultraviolet curable adhesive is used for manufacturing the optical device main body 700A.
- the present invention is not limited to this, and a thermosetting adhesive or a room temperature curable adhesive can also be used.
- the transmission type light modulator in which the light incidence surface and the light emission surface are different is used, but a reflection type light modulation device in which the light incidence surface and the light emission surface are the same may be used. .
- the optical device of the present invention can be used in the field of presentations, home theaters, and the like because it can enhance the bonding state of the light modulator to the color combining optical device and can form a good optical image without pixel shift. It can be used as an optical device that constitutes a projector.
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Abstract
Description
Claims
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JP2003301288A JP4103728B2 (ja) | 2003-08-26 | 2003-08-26 | 光学装置、およびプロジェクタ |
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US7330223B2 (en) * | 2005-06-01 | 2008-02-12 | United Microdisplay Optronics Corp. | Assembly and adjustment of optical kernel for LCD projectors |
TW200742209A (en) * | 2006-04-18 | 2007-11-01 | Zebex Ind Inc | Projector using laser light source |
CN101178503A (zh) * | 2007-12-12 | 2008-05-14 | 友达光电(苏州)有限公司 | 液晶显示器模块及其组装方法 |
CN101533157B (zh) * | 2008-03-14 | 2011-05-18 | 三洋科技中心(深圳)有限公司 | 影像合成组件和液晶投影装置 |
JP5499618B2 (ja) * | 2009-04-22 | 2014-05-21 | ソニー株式会社 | 投射型液晶表示装置 |
CN109709669B (zh) * | 2019-03-09 | 2023-07-21 | 新视家科技(北京)有限公司 | 一种投影机色轮结构及其散热方案 |
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2004
- 2004-08-24 US US10/923,843 patent/US7137705B2/en not_active Expired - Fee Related
- 2004-08-25 WO PCT/JP2004/012185 patent/WO2005019926A1/ja active Application Filing
- 2004-08-25 CN CNB2004800017882A patent/CN100505893C/zh not_active Expired - Fee Related
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JPH07152011A (ja) * | 1993-11-29 | 1995-06-16 | Sanyo Electric Co Ltd | 液晶プロジェクタの液晶パネルの調整機構 |
JPH11133504A (ja) * | 1997-08-27 | 1999-05-21 | Minolta Co Ltd | 投影光学装置 |
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Also Published As
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JP2005070511A (ja) | 2005-03-17 |
US7137705B2 (en) | 2006-11-21 |
CN1723414A (zh) | 2006-01-18 |
JP4103728B2 (ja) | 2008-06-18 |
CN100505893C (zh) | 2009-06-24 |
US20050083589A1 (en) | 2005-04-21 |
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