JP3633490B2 - Light source device and projector using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light source device and a projector that projects and displays an image using the light source device.
[0002]
[Prior art]
In the projector, light emitted from the illumination optical system is modulated according to image information (image signal) by a liquid crystal light valve or the like, and an image is displayed by projecting the modulated light on a screen.
[0003]
The illumination optical system includes a light source device. A light source device usually includes a pair of electrodes inside.With light emitting partA light tube and a reflector that reflects light emitted from the arc tube.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional light source device,, Of the light emitting partTube wall temperature becomes too highAnd the light emitting partThere is a problem that the light output of the light source device deteriorates due to white turbidity. this is, Of the light emitting partDue to devitrification. Here, devitrification is, Of the light emitting partThis is a phenomenon in which the glass forming the tube wall is recrystallized.
[0005]
The present invention has been made to solve the above-described problems in the prior art, and can reduce the deterioration of the light output of the light source device by reducing the devitrification of the arc tube provided in the light source device. The purpose is to provide technology that can be used.
[0006]
[Means for solving the problems and their functions and effects]
In order to solve at least a part of the problems described above, a first device of the present invention is a light source device,
Includes a pair of electrodes insideWith light emitting partWith light tube,
With sapphire or crystalFormed and beforeAround the light emitting partPlacedCylindricalA light member;
It is characterized by providing.
[0007]
In the light source device of the present invention,Around the light emitting partBecause a translucent member with relatively high thermal conductivity is placed, Tube in the upper part of the light emitting partAn increase in wall temperature can be reduced. Accordingly, devitrification of the arc tube can be reduced, and deterioration of the light output of the light source device can be reduced.
[0008]
[0009]
SapphireA and crystalThermal conductivity is relatively high. Therefore, sapphire the translucent memberWith a crystalIf formed, Of the light emitting partAn increase in tube wall temperature can be efficiently reduced.
[0010]
In the above apparatus, the arc tube may be a lamp that generates an arc discharge between the pair of electrodes, or a lamp in which a filament is formed between the pair of electrodes.
[0011]
[0012]
For example, the translucent member may be an outer tube that surrounds the entire arc tube.
[0013]
As described above, when the translucent member having a cylindrical shape is arranged outside the arc tube,, Of the light emitting partThe temperature rise of the tube wall can be reduced, and the tube wall temperature in the portion surrounded by the translucent member can be made substantially uniform.
[0014]
Furthermore, in the above device,
A holding portion for holding the arc tube and the outer tube;
A pair of power supply terminals provided in the holding portion and electrically connected to the pair of electrodes;
May be provided.
[0015]
If it carries out like this, the light source device comprised with an arc_tube | light_emitting_tube, an outer tube | pipe, and a holding part can be integrated.
[0016]
In the above apparatus,
Of the two end portions of the outer tube, one end portion may be provided with the holding portion, and the other end portion may be provided with a translucent plate.
[0017]
In the above apparatus,
The translucent member isIn the light emitting partIt is preferred that they are not in contact.
[0018]
Of the light emitting partEven when the tube wall temperature is too low, the light output of the light source device may deteriorate. Therefore, the translucent memberIn the light emitting partIf placed without contact, Of the light emitting partIt becomes relatively easy to keep the tube wall temperature within a predetermined temperature range.
[0019]
In the above apparatus,
You may make it provide the reflector which has a concave surface for reflecting the light inject | emitted from the said arc_tube | light_emitting_tube.
[0020]
In this way, the light emitted from the arc tube can be emitted in a predetermined direction.
[0021]
Furthermore, in the above device,
You may make it equip the opening surface of the said reflector with the translucent board | plate material.
[0022]
A second device of the present invention is a projector for projecting and displaying an image,
Any of the above lightAn illumination optical system including a source device;
An electro-optical device that modulates light from the illumination optical system according to image information;
A projection optical system for projecting modulated light obtained by the electro-optical device;,
TheIt is characterized by providing.
[0023]
In the projector of the present invention, the light source device which is the first device of the present invention is used. Therefore, Of the light emitting partIt is possible to reduce devitrification. As a result, it is possible to reduce the deterioration of the light output of the light source device, and it is possible to reduce the deterioration of the brightness of the image projected and displayed by the projector.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
A. Light source device:
A-1. First embodiment:
FIG. 1 is an explanatory view showing a light source device 110 as a first embodiment to which the present invention is applied. FIG. 1 is a schematic cross-sectional view of the light source device 110 taken along a yz plane that passes through the light source optical axis 110ax and is parallel to the light source optical axis 110ax. Here, the light source optical axis 110ax means the central axis of the light emitted from the light source device 110.
[0025]
The light source device 110 includes an arc tube 120, an outer tube 130 provided outside the arc tube 120, a holder 140 that holds the arc tube 120 and the outer tube 130, and a reflector 150.
[0026]
The reflector 150 has a concave ellipsoid 150R that is axisymmetric with respect to the light source optical axis 110ax. The reflector 150 is made of hard glass having excellent heat resistance, and a reflective film is formed on the concave surface 150R. As the reflective film, a dielectric multilayer film or a metal film such as an aluminum film or a silver film can be used. The emission center of the arc tube 120 is arranged near the first focal point of the spheroid, and the light emitted from the arc tube 120 passes through the outer tube 130 and is reflected by the reflector 150, and then the spheroid. Head to the second focus.
[0027]
When this light source device 110 is applied to a projector to be described later, a collimating lens for converting light traveling toward the second focal point of the spheroid surface into light substantially parallel to the light source optical axis 110ax is used.
[0028]
FIG. 2 is an explanatory view showing the arc tube 120, the outer tube 130, and the holding unit 140 in FIG. 1 in an enlarged manner.
[0029]
The arc tube 120 is a high-pressure mercury lamp. The arc tube 120 includes a substantially spherical light emitting portion 120c at the center thereof, and halogen gas is sealed inside the light emitting portion 120c. The tube wall of the arc tube 120 is made of quartz having excellent heat resistance and pressure resistance.
[0030]
Inside the arc tube 120, a pair of electrodes 124e1, 124e2 are arranged in a state of being separated by a certain distance. Each of the electrodes 124e1 and 124e2 has a tungsten coil provided at the tip of a tungsten electrode core. The pair of electrodes 124e1 and 124e2 are connected to nickel lead wires 124n1 and 124n2 through molybdenum stays 124m1 and 124m2, respectively. The lead wires 124n1 and 124n2 are drawn out of the arc tube 120 and connected to power supply terminals 124s1 and 124s2 provided in the holding unit 140. In other words, the pair of electrodes 124e1 and 124e2 are electrically connected to the pair of power supply terminals 124s1 and 124s2. When a predetermined voltage is applied between the electrodes 124e1 and 124e2 via the power supply terminals 124s1 and 124s2, arc discharge occurs between the electrodes. Thereby, the substantially radial light centering on the center vicinity of the light emission part 120c is inject | emitted.
[0031]
Note that while arc discharge is occurring between the pair of electrodes 124e1, 124e2., Of the light emitting unit 120cInside, a halogen regeneration cycle is in progress. That is, the tungsten forming the electrodes 124e1 and 124e2 isIn the light emitting unit 120cEvaporate at. The evaporated tungsten, Of the light emitting unit 120cIn the vicinity of the tube wall, it reacts with the halogen gas sealed in the tube to produce tungsten halide. When the generated tungsten halide approaches the electrodes 124e1 and 124e2 due to concentration diffusion, convection, or the like, it is decomposed into halogen gas and tungsten. The decomposed tungsten is deposited on the surfaces of the electrodes 124e1 and 124e2. On the other hand, the decomposed halogen gas reacts again with the evaporated tungsten near the tube wall, and the tungsten halide is generated again. As the halogen regeneration cycle proceeds, the arc tube 120 can continuously emit light.
[0032]
The outer tube 130 is a translucent member provided in the vicinity of the outer side of the arc tube 120 and has a substantially cylindrical shape surrounding the entire arc tube 120. The outer tube 130 is not in contact with the arc tube 120. Of the two end portions of the outer tube 130, a holding portion 140 is provided at one end portion, and a substantially circular translucent plate member 132 is provided at the other end portion. In this way, when the arc tube 120 is ruptured by providing the holding portion 140 and the translucent plate member 132 at the end of the outer tube 130 and enclosing the arc tube 120, the fragments are exposed to the outside of the outer tube 130. Since it can prevent scattering, there exists an advantage that collection | recovery of a fragment can be performed easily. A small hole is provided in the center of the translucent plate member 132, and the second lead wire 124n2 is drawn through the small hole.
[0033]
The holding part 140 has a substantially cylindrical outer shape and is made of an insulating material. A substantially circular concave portion 142 is formed on one side of the holding portion 140. The arc tube 120 and the outer tube 130 are fixed in the recess 142. Specifically, it is fixed to the holding part 140 with an adhesive 144 having excellent heat resistance and insulation properties such as cement. In addition, a pair of power supply terminals 124 s 1 and 124 s 2 are provided on the other side of the holding portion 140, and an uneven portion 146 is formed.
[0034]
As shown in the drawing, in this embodiment, the arc tube 120, the outer tube 130, and the holding unit 140 are integrated by the holding unit 140 that holds the arc tube 120 and the outer tube 130. In this way, in the light source device 110, when the arc tube 120 breaks down, the arc tube unit composed of the arc tube 120, the outer tube 130, and the holding unit 140 can be easily replaced. is there.
[0035]
By the way, as mentioned above, Of the light emitting partIf the tube wall temperature gets too high, The light emitting partThe light output of the light source device may deteriorate due to devitrification. Here, devitrification is, Of the light emitting partThis is a phenomenon in which the tube wall (quartz in this embodiment) is recrystallized. When the light source device 110 of FIG. 1 is used, this phenomenon is likely to occur on the tube wall of the upper portion of the light emitting unit 120c when the pair of electrodes 124e1 and 124e2 are arranged horizontally with respect to the ground. This is because heat concentrates on the tube wall of the upper part of the light emitting unit 120c. The tube wall temperature of the upper part may be, for example, about 100K to about 200K higher than the tube wall temperature of the lower part.
[0036]
In the present embodiment, the outer tube 130 provided outside the arc tube 120 is made of a light-transmitting material having a relatively high thermal conductivity. The translucent material forming the outer tube 130 is preferably a material having a thermal conductivity of about 5.0 W / (m · K) or more, and a material having a thermal conductivity of about 10 W / (m · K) or more. Is desirable. As the translucent material having a thermal conductivity of about 5.0 W / (m · K) or more, for example, quartz (a single crystal of SiO 2) or sapphire can be used. In this embodiment, sapphire having a thermal conductivity of about 42 W / (m · K) is used as the translucent material. Since sapphire has a relatively high Young's modulus, there is an advantage that the outer tube 130 can be prevented from rupturing with the rupture of the arc tube 120.
[0037]
Thus, if the outer tube 130 made of a light-transmitting material having a relatively high thermal conductivity is provided outside the arc tube 120,, Of the light emitting unit 120cSince the temperature rise of the pipe wall can be reduced efficiently, Of the light emitting unit 120cIt becomes possible to reduce devitrification of the tube wall.
[0038]
The translucent plate member 132 provided at the end of the outer tube 130 is also formed of sapphire, like the outer tube 130.
[0039]
Of the light emitting partIf the tube wall temperature becomes too high,, The light emitting partThe light output of the light source device deteriorates due to devitrification, but conversely, Of the light emitting partEven if the tube wall temperature gets too low, The light emitting partThe light output of the light source device deteriorates due to blackening. Here, blackening means that the tungsten halide produced in the halogen regeneration cycle described above is, Of the light emitting partIt is a phenomenon that adheres to the tube wall. When the light source device 110 of FIG. 1 is used, this phenomenon is likely to occur on the tube wall of the lower portion of the light emitting unit 120c when the pair of electrodes 124e1 and 124e2 are disposed horizontally with respect to the ground. As can be seen from the above description, this is because the heat of the tube wall in the lower part of the light emitting unit 120c moves to the tube wall in the upper part.
[0040]
For this reason, in this embodiment, an outer tube 130 having a cylindrical shape surrounding the entire arc tube 120 is disposed outside the arc tube 120. If the translucent member having such a cylindrical shape is arranged outside the arc tube, the temperature rise of the tube wall in the upper part of the light emitting portion 120c of the arc tube 120 can be reduced and the outer tube 130 can be reduced. The tube wall temperature of the upper part and the lower part surrounded by can be made substantially uniform. In this embodiment, the outer tube 130 is arranged in a state where it does not come into contact with the arc tube 120, so that it is compared with a case where it is arranged in a state where it is in contact., Of the light emitting unit 120cThe tube wall temperature can be easily kept within a predetermined temperature range that is neither too high nor too low. in this way, Of the light emitting partBy setting the tube wall temperature within the specified temperature range, Of the light emitting partIt is possible to simultaneously reduce devitrification and blackening.
[0041]
In the present embodiment, the holding portion 140 that holds the arc tube 120 and the outer tube 130 is formed of aluminum nitride (AlN), which is an insulating material having a relatively high thermal conductivity. Moreover, the uneven | corrugated | grooved part 146 formed in the holding | maintenance part 140 functions as a cooling fin. In this way, the heat of the arc tube 120 can be released to the outside via the outer tube 130 and the holding unit 140. Therefore, Of the light emitting unit 120cAs a result, the temperature rise of the tube wall can be further reduced., Of the light emitting unit 120cIt is possible to further reduce the devitrification of the tube wall. Note that, as the adhesive 144 that fixes the arc tube 120, the outer tube 130, and the holding unit 140, it is preferable to use a material having a relatively high thermal conductivity, like the holding unit 140.
[0042]
As described above, the light source device 110 of this embodiment includes the pair of electrodes 124e1 and 124e2 inside.The light emitting unit 120cA light tube 120 and an outer tube 130 formed of sapphire having a thermal conductivity of about 5.0 W / (m · K) or more and disposed outside the arc tube. If such a light source device 110 is used,, Of the light emitting partAn increase in tube wall temperature due to heat generation can be reduced. Therefore, Of the light emitting partWhile devitrification can be reduced, it is possible to reduce deterioration of the light output of the light source device.
[0043]
The light source device 110 shown in FIG. 1 includes the reflector 150, but the reflector can be omitted.
[0044]
A-2. Second embodiment:
FIG. 3 is an explanatory view showing a light source device 110A as a second embodiment to which the present invention is applied. The light source device 110A is substantially the same as the light source device 110 (FIGS. 1 and 2) of the first embodiment, except that the translucent plate 132 provided at the end of the outer tube 130 is omitted. Instead, a translucent plate material 152 is provided on the opening surface of the reflector 150.
[0045]
Thus, even if the translucent plate material 152 is provided on the opening surface of the reflector 150, it is possible to prevent the fragments from scattering outside the reflector 150 when the arc tube 120 is ruptured. There is an advantage that fragments can be easily collected.
[0046]
A-3. Third embodiment:
FIG. 4 is an explanatory view showing a light source device 110B as a third embodiment to which the present invention is applied. The light source device 110B is substantially the same as the light source device 110A (FIG. 3) of the second embodiment, but the holding unit 140 is omitted. In the light source device 110B of the present embodiment, the arc tube 120, the outer tube 130, and the reflector 150 'are integrated.
[0047]
That is, in the light source device 110B of the present embodiment, the reflector 150 'has a substantially cylindrical neck portion 154 at the bottom thereof. The arc tube 120 and the outer tube 130 are inserted inside the neck portion 154, and are fixed with an adhesive 156 having excellent heat resistance and insulation properties such as cement.
[0048]
Furthermore, the pair of power supply terminals 124 s 1 and 124 s 2 is omitted with the omission of the holding unit 140 of FIG. The first lead wire 124n1 is drawn to the outside through the adhesive 156, and the second lead wire 124n2 is drawn to the outside through the small hole provided in the reflector 150 '.
[0049]
Thus, even if the holding unit 140 is omitted, the light source device 110B can be configured.
[0050]
A-4. Fourth embodiment:
FIG. 5 is an explanatory view showing a light source device 110C as a fourth embodiment to which the present invention is applied. The light source device 110C is substantially the same as the light source device 110B (FIG. 4) of the third embodiment, but the shape of the translucent member disposed outside the arc tube 120 is changed.
[0051]
That is, in the present embodiment, a translucent member 130C having a cylindrical shape surrounding a part of the arc tube 120 (specifically, the light emitting portion 120c) is used. The translucent member 130 </ b> C is fixed to the arc tube 120. Specifically, the translucent member 130C is fixed to the arc tube 120 by an adhesive AD at a position away from the light emitting portion 120c. In addition, as adhesive AD, the thing excellent in heat resistance and translucency is preferable.
[0052]
A-5.Reference example:
FIG.Reference exampleIt is explanatory drawing which shows light source device 110D as. This light source device 110D is also substantially the same as the light source device 110B (FIG. 4) of the third embodiment, but the shape of the translucent member disposed outside the arc tube 120 is changed.
[0053]
That is,Reference exampleThen, a substantially rectangular translucent plate member 130 </ b> D is disposed outside the arc tube 120. In the light source device 110D of FIG. 6, since it is assumed that the pair of electrodes 124e1 and 124e2 are disposed horizontally with respect to the ground, the translucent plate 130D is disposed only on the upper side of the arc tube 120. ing. Even in this case, the temperature rise of the tube wall in the upper part of the light emitting portion 120c of the arc tube 120 can be reduced., Of the light emitting unit 120cThe devitrification of the tube wall can be reduced.
[0054]
The translucent plate 130D is fixed to the reflector 150 'with an adhesive AD above the arc tube 120.
[0055]
A-6.5thExample:
FIG. 7 applies the present invention.5thIt is explanatory drawing which shows the light source device 110E as an Example. The light source device 110E is also substantially the same as the light source device 110B (FIG. 4) of the third embodiment, but the translucent member disposed outside the arc tube 120 is the arc tube 12.0 light emitting part 120c andIt is arranged in contact.
[0056]
Thus, the arc tube 120 light emitting part 120c andWhen the translucent member 130E comes into contact, Of the light emitting unit 120cThe temperature rise of the tube wall can be reduced efficiently. However, if the tube wall temperature becomes too low,, Of the light emitting unit 120cThe tube wall will turn black. Therefore, in this embodiment, the length of the translucent member 130E having a cylindrical shape is reduced. Even in this way, Of the light emitting unit 120cSince the tube wall temperature can be kept within the specified temperature range, Of the light emitting unit 120cAs a result, the temperature rise of the tube wall can be reduced, Of the light emitting unit 120cThe devitrification of the tube wall can be reduced.
[0057]
The translucent member 130E is fixed to the light emitting part 120c of the arc tube 120 by the adhesive AD on the light emitting part 120c of the arc tube 120. As shown in the figure, since the adhesive AD is attached to the light emitting portion 120c, it is preferable to use an adhesive AD having excellent heat resistance.
[0058]
As explained above, the second or second5thSimilarly to the light source device 110 of the first embodiment, the light source devices 110A to 110E of the embodiment also include a pair of electrodes 124e1 and 124e2 inside.The light emitting unit 120cA light tube 120, and translucent members 130, 130C, 130D, and 130E that are formed of sapphire having a thermal conductivity of about 5.0 W / (m · K) or more and are disposed outside the arc tube. ing. Therefore, it is possible to reduce the devitrification of the arc tube and to reduce the deterioration of the light output of the light source device.
[0059]
B. projector:
FIG. 8 is a schematic configuration diagram showing an example of a projector to which the present invention is applied. The projector 1000 includes an illumination optical system 100, a color light separation optical system 200, a relay optical system 220, three liquid crystal light valves 300R, 300G, and 300B, a cross dichroic prism 320, and a projection optical system 340. Yes.
[0060]
The illumination optical system 100 includes a polarization generating optical system, and emits one type of linearly polarized light having a uniform polarization direction. The light emitted from the illumination optical system 100 is separated into three color lights of red (R), green (G), and blue (B) in the color light separation optical system 200. Each separated color light is modulated corresponding to image information in the liquid crystal light valves 300R, 300G, and 300B. Here, the liquid crystal light valves 300R, 300G, and 300B include a liquid crystal panel corresponding to the electro-optical device according to the present invention, and polarizing plates disposed on the light incident surface side and the light emission surface side thereof. The modulated light modulated according to the image information in the liquid crystal light valves 300R, 300G, and 300B is synthesized by the cross dichroic prism 320 and projected onto the screen SC by the projection optical system 340. As a result, an image is displayed on the screen SC. Note that the configuration and functions of each part of the projector as shown in FIG. 8 are described in detail in, for example, Japanese Patent Laid-Open No. 10-325954 disclosed by the applicant of the present application. Omitted.
[0061]
In the projector 1000, the light source device 110 of FIG. 1 is used as the light source device of the illumination optical system 100. As described above, the light source device 110 includes the reflector 150 having the spheroid-shaped concave surface 150R, and emits light toward the second focal point of the spheroid. For this reason, on the light exit surface side of the light source device 110, a collimating lens 180 is provided for converting light traveling toward the second focal point of the spheroid surface into light substantially parallel to the light source optical axis 110ax.
[0062]
In the light source device 110, a translucent member (outer tube) 130 having a relatively high thermal conductivity is disposed outside the arc tube 120., Of the light emitting partAn increase in tube wall temperature due to heat generation can be reduced. Therefore, Of the light emitting partDevitrification can be reduced, and deterioration of the light output of the light source device can be reduced.
[0063]
The projector 1000 includes a cooling fan 400 for cooling the light source device 110. Therefore, the arc tube 120 light emitting partThe rise in the tube wall temperature can be further reduced, and as a result, the deterioration of the light output of the light source device 110 can be further reduced.
[0064]
When such a light source device 110 is applied to the projector 1000, it is possible to reduce deterioration in brightness of an image projected and displayed by the projector.
[0065]
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.
[0066]
(1) In the light source devices 110 and 110A of the first and second embodiments, a holding portion 140 and a pair of power supply terminals 124s1 and 124s2 are provided at one of the two ends of the outer tube 130. However, when the light source device is configured by omitting the reflector 150, a holding portion and a power supply terminal may be provided at both ends of the outer tube.
[0067]
(2) In the above embodiment, the tube wall of the arc tube 120 is formed of quartz, but an arc tube having a tube wall formed of other glass may be used.
[0068]
(3) In the above embodiment, a high-pressure mercury lamp is used as the arc tube 120, but a lamp (discharge lamp) that generates arc discharge between a pair of electrodes can be used as the arc tube. As the arc tube, a lamp in which a filament is formed between a pair of electrodes such as a halogen lamp may be used.
[0069]
(4) In the light source devices 110, 110 </ b> A, 110 </ b> B of the first to third embodiments, a translucent member (outer tube) 130 having a cylindrical shape surrounding the entire arc tube 120 is used. The fourth and5thIn the light source devices 110C and 110E of the embodiment, translucent members 130C and 130E having a cylindrical shape surrounding a part of the arc tube are used.
[0070]
Thus, generally, the translucent member should just have the cylindrical shape surrounding at least one part of an arc_tube | light_emitting_tube.
[0071]
Also,Reference exampleIn the light source device 110D, a translucent plate member 130D disposed only on the upper side of the arc tube 120 is used.
[0072]
As described above, generally, the translucent member formed of a translucent material having a thermal conductivity of about 5.0 W / (m · K) or more may be disposed outside the arc tube.
[0073]
(5) In the above embodiment, the reflector 150 is formed using hard glass, but may be formed using aluminum. In this way, the light source device and the projector using the light source device can be reduced in weight.
[0074]
Moreover, in the said Example, although the reflector 150 has the concave surface 150R of a rotation ellipsoid shape, you may make it have a concave surface of a rotation paraboloid shape. In this case, since the light reflected by the reflector is emitted almost in parallel with the light source optical axis 110ax, the collimating lens 180 of the projector 1000 can be omitted.
[0075]
Generally, the light source device only needs to include a reflector having a concave surface for reflecting light emitted from the arc tube. In this way, the light emitted from the arc tube can be emitted in a predetermined direction.
[0076]
(6) In the above embodiment, the case where the present invention is applied to a transmissive projector has been described as an example. However, the present invention can also be applied to a reflective projector. Here, “transmission type” means that the electro-optical device as the light modulation means transmits light, such as a transmission type liquid crystal panel, and “reflection type” means reflection type liquid crystal. This means that the electro-optical device as the light modulation means such as a panel is a type that reflects light.
[0077]
(7) In the above embodiment, the projector 1000 includes the liquid crystal panel as the electro-optical device. However, instead of this, the projector 1000 may include a micromirror light modulator. For example, a DMD (digital micromirror device) (trademark of TI) can be used as the micromirror light modulator. Generally, any electro-optical device may be used as long as it modulates light from an illumination optical system according to image information.
[0078]
(8) In the above embodiment, the projector 1000 that displays a color image has been described as an example, but the same applies to a projector that displays a monochrome image.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a light source device 110 as a first embodiment to which the present invention is applied.
FIG. 2 is an explanatory diagram showing an enlarged view of the arc tube 120, the outer tube 130, and the holding unit 140 of FIG.
FIG. 3 is an explanatory view showing a light source device 110A as a second embodiment to which the present invention is applied.
FIG. 4 is an explanatory view showing a light source device 110B as a third embodiment to which the present invention is applied.
FIG. 5 is an explanatory view showing a light source device 110C as a fourth embodiment to which the present invention is applied.
[Fig. 6]Reference exampleIt is explanatory drawing which shows light source device 110D as.
FIG. 7 is an application of the present invention.5thIt is explanatory drawing which shows the light source device 110E as an Example.
FIG. 8 is a schematic configuration diagram showing an example of a projector to which the present invention is applied.
[Explanation of symbols]
100: Illumination optical system
1000 ... Projector
110, 110A-110E ... Light source device
110ax ... light source optical axis
120 ... arc tube
120c ... Light emitting part
124e1, 124e2 ... electrodes
124m1,124m2 ... Molybdenum stay
124n1, 124n2 ... Lead wire
124s1, 124s2 ... Power supply terminals
130 ... Outer tube (translucent member)
130C ... Translucent member
130D ... Translucent plate material
130E ... Translucent member
132 ... Translucent plate material
140 ... holding part
142 ... concave portion
144: Adhesive
146 ... uneven portion
150, 150 '... reflector
150R ... concave surface
152 ... Plate material
154 ... Neck
156 ... Adhesive
180 ... Parallelizing lens
200: Color light separation optical system
220: Relay optical system
300R, 300G, 300B ... Liquid crystal light valve
320 ... Cross dichroic prism
340 ... Projection optical system
400 ... Cooling fan
AD ... Adhesive
SC ... Screen

Claims (10)

A light source device,
A light emission tube having including light emitting portion with a pair of electrodes on the inside,
Is formed of sapphire or quartz, before Symbol translucent member arranged cylindrically around the light emitting portion,
A light source device comprising: The light source device according to claim 1,
The arc tube is a light source device that is a lamp that generates arc discharge between the pair of electrodes. The light source device according to claim 1,
The arc tube is a light source device that is a lamp in which a filament is formed between the pair of electrodes. The light source device according to claim 1 ,
The light-transmitting member is a light source device that is an outer tube that surrounds the entire arc tube. The light source device according to claim 4 , further comprising:
A holding portion for holding the arc tube and the outer tube;
A pair of power supply terminals provided in the holding portion and electrically connected to the pair of electrodes;
A light source device. The light source device according to claim 5 ,
A light source device in which one of the two ends of the outer tube is provided with the holding portion and the other end is provided with a translucent plate. The light source device according to any one of claims 1 to 6 ,
The translucent member is not in contact with the front Symbol emitting portion, the light source device. The light source device according to claim 1, further comprising:
A light source device comprising a reflector having a concave surface for reflecting light emitted from the arc tube. The light source device according to claim 8 , further comprising:
A light source device comprising a translucent plate on an opening surface of the reflector. A projector that projects and displays an image,
An illumination optical system including the light source device according to any one of claims 1 to 9 ,
An electro-optical device that modulates light from the illumination optical system according to image information;
A projection optical system that projects the modulated light obtained by the electro-optical device ;
Projector, characterized in that it comprises a.

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