JP2001125197A - Light source device, illuminator and projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device having a light generating means and a concave mirror, where light reflected by the concave mirror does not return to the vicinity of the light emitting part of the light generating means without making the outermost diameter in a perpendicular direction to an optical axis larger, whose light utilization efficiency is high and which is miniaturized; and an illuminator and a bright projection type display device capable of efficiently performing illumination with the light from the light generating means by using the light source device. SOLUTION: This light source device is equipped with the light generating means 101, the 1st concave mirror 102, and an auxiliary concave mirror 103 turning its reflection surface to the same direction as the mirror 102 and arranged at a position where it can condense the light which can not be condensed by the mirror 102. Then, the illuminator is equipped with an optical means in the light source device and the projection type display device is equipped with an optical means, an optical modulation element and a projection lens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device having a light generating means and a concave mirror, a lighting device, and a projection display device for projecting a large-screen image on a screen.

[0002]

2. Description of the Related Art In recent years, a projection display apparatus using various light modulation elements has been receiving attention as a large-screen projection video apparatus.
When performing these large-screen displays, the brightness of the displayed video is one of the most important items. This brightness is determined by the brightness of the lamp, the light collection efficiency of the concave mirror, the illumination efficiency of the illumination lens system, the light use efficiency of the light modulation element, and the like. In order to maximize the brightness of the lamp, it is desired to improve the efficiency of the condensing of the concave mirror and the illumination lens system.

[0003] Regarding the conventional high efficiency of lamp radiation,
FIG. 6 shows a basic configuration of a light source device disclosed as a first conventional example in JP-A-5-40223 and JP-A-6-130301. In these light source devices, the light emitted from the light emitting portion of the lamp 601 is condensed by the first concave mirror 602 having an elliptical or parabolic reflection surface shape, and cannot be condensed by the first concave mirror 602. The emitted light from the light emitting unit of the lamp 601 is
After the reflection surface is reflected by the second concave mirror 603 facing the reflection surface side of the first concave mirror 602, the light is returned to the vicinity of the light emitting portion of the lamp 601 again and condensed by the first concave mirror 602. in this way,
The lamp 601 emits light by using the first concave mirror 602 whose reflecting surfaces face each other and the second concave mirror 603 having an outermost diameter larger than the outermost diameter perpendicular to the optical axis 610 of the first concave mirror 602. The light emitted from the part is taken in as much as possible and collected by the first concave mirror 602.

FIG. 7 shows a basic configuration of a light source device disclosed as a second conventional example in JP-A-6-203603.
In this light source device, the light emitting part of the lamp 701 is arranged at the focal point D of the parabolic reflecting mirror as the first concave mirror 702, and the second
The center of the spherical surface forming the reflecting surface of the spherical reflecting mirror as the concave mirror 703 is parabolic on the optical axis 710 passing through the focal point D of the parabolic reflecting mirror 702 and higher than the focal point D of the parabolic reflecting mirror 702. It is arranged on the opening side of the paraboloid forming the reflection surface of the surface reflection mirror 702, and the reflection surface of the plane reflection mirror 704 has the optical axis 710 passing through the focal point D of the paraboloid reflection mirror 702 as a normal line,
In addition, it is disposed in a plane passing substantially the midpoint H between the focal point D of the parabolic reflector 702 and the center E of the spherical surface forming the reflection surface of the spherical reflector 703.

[0005] The light source device includes a first concave mirror 70.
In contrast to the first conventional example, the radiated light from the light emitting portion of the lamp 701, which could not be condensed by the second mirror 702, is different from the first conventional example in that a spherical mirror having a reflecting surface in the same direction as the first concave mirror 702 as the plane mirror 704 and the second concave mirror 703 After being reflected by the combination of the first concave mirror 70 and the first concave mirror 70
This is a configuration in which light is condensed at 2. However, the second concave mirror 703 having the outermost diameter larger than the outermost diameter in the direction perpendicular to the optical axis 710 of the first concave mirror 702 is used to take in as much light emitted from the light emitting portion of the lamp 701 as possible. It is the same as the first conventional example in that the light is focused by the first concave mirror 702.

Further, as a third conventional example, Japanese Patent Application Laid-Open No. 11-14337
FIG. 8 shows a basic configuration of the light source device disclosed in FIG. In this light source device, a first light emitting point LA at which the focal positions of the arc lamp 801 and the parabolic reflecting mirror as the first concave mirror 802 coincide with each other, and a second light emitting point LB opposed thereto are set. Have. The auxiliary mirror 803 has a semi-elliptical reflecting surface that covers a part of the light emitting part of the arc lamp 801, and the light from the second light emitting part LB is first emitted by the semi-elliptical reflecting surface. The light is condensed at a position offset toward the first light emitting point LA with respect to a center position between the point LA and the second light emitting point LB. Therefore, the arc lamp 801 can be substantially handled as a point light source lamp. Thank you
Even without using a large parabolic reflector, it is possible to obtain bright and highly parallel emitted light of the apparatus. In addition, since a large parabolic reflector is not used, downsizing of the apparatus can be achieved at the same time.

Further, the light source device includes a first concave mirror 80.
The radiated light from the light emitting part of the lamp,
The first conventional example is that after the reflection surface is reflected by the second concave mirror 803 facing the reflection surface side of the first concave mirror 802, it is returned to the vicinity of the light-emitting portion of the lamp 801 again and condensed by the first concave mirror 802. Is the same as However, the second concave mirror 803 for taking in as much light emitted from the light emitting portion of the lamp 801 as the optical axis 810 of the first concave mirror 802 is used.
Is different from the first conventional example in that it has an outermost diameter smaller than the outermost diameter in the vertical direction.

[0008]

In the configuration as in the first prior art, the second concave mirror having the outermost diameter larger than the outermost diameter in the direction perpendicular to the optical axis 610 of the first concave mirror 602. 603 is used. Thus, the first concave mirror 602
Only to obtain higher efficiency, the first concave mirror 602
There is a problem that the light source device becomes larger than the light source device using one.

Further, after the light emitted from the light emitting portion of the lamp 601 is reflected by the second concave mirror 603, the lamp 60
In order to return the light to the vicinity of the light emitting part 2, the light is absorbed by the gas, the luminescent substance, and the material constituting the lamp in the lamp tube used for a metal halide lamp or a mercury lamp in which the inside of the luminous tube at the time of lighting is set to an extremely high pressure. And loss due to reflection and the like.

[0010] Further, even in the configuration of the second conventional example,
Although the plane mirror 704 is used, the first concave mirror 70
A second concave mirror 703 having an outermost diameter larger than the outermost diameter in a direction perpendicular to the second optical axis 710 is used. Thus, similarly to the first conventional example, in order to obtain higher efficiency only with the first concave mirror 702, there is a problem that the light source device becomes larger than the light source device using the first concave mirror 7021. .

Further, after the light radiated from the light emitting portion of the lamp 701 is reflected by the second concave mirror 703, the light is again emitted from the lamp 70.
In order to return the light to the vicinity of the light emitting part of 1, the light is absorbed by the gas, the luminescent material, and the material constituting the lamp in the lamp tube used in a metal halide lamp or a mercury lamp in which the inside of the luminous tube at the time of lighting is set to an extremely high pressure. And loss due to reflection and the like.

In the third conventional example, the second concave mirror 803 is smaller than the outermost diameter on the exit side of the first concave mirror 802,
As in the conventional example and the second conventional example, the light emitted from the light emitting part of the lamp 801 is reflected by the second concave mirror 803 and then returned to the vicinity of the light emitting part of the lamp 801 again. However, there is a problem that light is lost by absorption, reflection, and the like due to the gas in the lamp tube, the light-emitting substance, and the material constituting the lamp used in a mercury lamp or the like in which the pressure is extremely high.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and the outermost diameter in the direction perpendicular to the optical axis of the light source device does not become larger than that of the first concave mirror. A light source device that does not return to the vicinity of the light emitting portion of the lamp after light reflected from the auxiliary concave mirror is reflected by the auxiliary concave mirror, and by providing the light source device, the outermost diameter in the direction perpendicular to the optical axis is the first diameter.
It is an object of the present invention to provide a lighting device and a projection display device that are more efficient without being larger than a concave mirror.

[0014]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a light generating means for generating light, a concave mirror for condensing outgoing light output from the light generating means, and An auxiliary mirror is provided on the side where the emitted light is reflected by the concave mirror, and the auxiliary mirror reflects or condenses the emitted light output from the light generating means, and the auxiliary mirror emits light reflected or condensed by itself. The light source device is characterized in that the concave mirror directly outputs the outgoing light output from the light generating means in the output direction without returning to the concave mirror.

The auxiliary mirror according to the present invention may be arranged such that the concave mirror outputs substantially all of the light reflected or condensed in a direction in which the outgoing light output from the light generating means is output. Features.

The number of the auxiliary mirrors according to the present invention is as follows.
It is characterized by being one or more.

The concave mirror according to the present invention is a parabolic mirror or an elliptical mirror having a quadratic curved surface.

Further, the auxiliary mirror according to the present invention is a parabolic mirror, an elliptical mirror, or a plane mirror having a quadratic curved surface.

Further, the auxiliary mirror according to the present invention is a parabolic mirror, the concave mirror is a parabolic mirror, and the focal length of the auxiliary mirror is shorter than the concave mirror.

The auxiliary mirror according to the present invention is characterized in that the position of the optical axis and the focal point of the concave mirror substantially coincide with each other.

Further, the light generating means of the present invention generates light using an arc lamp.

According to the present invention, there is provided a light source device according to the present invention, and lens means for converting light condensed by the concave mirror and the auxiliary mirror into substantially parallel light. It is a lighting device.

Further, the present invention provides a light source device according to the present invention, lens means for converting light condensed by the concave mirror and the auxiliary mirror into substantially parallel light, and converting the substantially parallel light into space. A projection display device comprising: a light modulation element that forms an optical image by performing optical modulation; and a projection lens that projects the optical image onto a screen.

For example, in order to solve the above problems, the light source device according to the present invention comprises a light generating means, a concave mirror for condensing light output from the light generating means, and a reflecting mirror in the same direction as the concave mirror. And an auxiliary mirror disposed at a position capable of condensing the light emitted from the light generating means which cannot be condensed by the concave mirror.

According to this light source device, as shown in FIG. 1, the auxiliary mirror 103 having the outermost diameter smaller than the outermost diameter in the direction perpendicular to the optical axis 110 of the concave mirror 102 is used. It is possible to provide a light source device that can obtain high efficiency without making the outermost diameter of 103 larger than the outermost diameter of concave mirror 102.

Further, some or all of the radiated light from the light emitting portion of the lamp 101, which could not be condensed by the concave mirror 1021, does not return to the vicinity of the light emitting portion of the lamp 101 after being reflected by the auxiliary mirror 103. A light source device capable of condensing light emitted from the light emitting portion of the lamp 101 with high efficiency because light can be collected by the gas in the tube, the light emitting substance, and the material constituting the lamp without loss by absorption, reflection, etc. Can be provided.

In the light source device, by using one or more auxiliary mirrors, the radiated light from the light emitting portion of the lamp can be divided and collected, and the length of the light source device in the optical axis direction can be shortened. There are advantages.

In the above light source device, it is preferable that the concave mirror uses a parabolic mirror or an elliptical mirror.

In the light source device, it is preferable that the auxiliary mirror uses one of a parabolic mirror and an elliptical mirror.

In the light source device, it is preferable that the auxiliary mirror is the same secondary curved mirror having a different focal length from the concave mirror.

In the light source device, it is preferable that the concave mirror and the auxiliary mirror have the same focal point.

In the light source device, it is preferable that the light generating means uses an arc lamp.

In order to achieve the above-mentioned object, an illumination device according to the present invention includes the light source device and optical means for converting light condensed by a concave mirror of the light source device into substantially parallel light. It is characterized by.

According to this configuration, the light source device provides an illuminating device that can obtain high efficiency without making the outermost diameter in the direction perpendicular to the optical axis of the auxiliary mirror larger than the outermost diameter of the concave mirror. It becomes possible.

In order to achieve the above-mentioned object, a projection display device according to the present invention comprises: an optical unit for converting light condensed by the light source device and the concave mirror of the light source device into substantially parallel light; A light modulation element that spatially modulates light emitted from the optical unit to form an optical image; and a projection lens that projects the optical image.

According to this configuration, the light source device is a projection type display device that can obtain high efficiency without making the outermost diameter in the direction perpendicular to the optical axis of the auxiliary mirror larger than the outermost diameter of the concave mirror. Can be provided.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1, 2 and 3 show schematic structures of a light source device, a lighting device, and a projection display device according to the present embodiment, respectively.

This light source device comprises a lamp 101, a first parabolic mirror 102, and an auxiliary parabolic mirror 103.

Each of these illumination devices and projection display devices has a light source device composed of a lamp 101, a first parabolic mirror 102, and an auxiliary parabolic mirror 103.

Note that the lamp 101 of the present embodiment is an example of the light generating means of the present invention, and the first parabolic mirror 102 of the present embodiment is an example of the concave mirror of the present invention. The auxiliary parabolic mirror 103 is an example of the auxiliary mirror of the present invention.

Examples of the lamp 101 include a xenon lamp having a light-emitting portion very close to a point light source and capable of outputting a large light, a metal halide lamp having an excellent luminous efficiency, a mercury lamp having an extremely high pressure in the arc tube at the time of lighting, And a halogen lamp.

The operation of the light source device shown in FIG. 1 will be described with reference to FIG.

The first parabolic mirror 102 is sufficient for the lamp 101
When there is an area where the light emitted from the light emitting unit cannot be collected, the reflecting surface is directed in the same direction as the first parabolic mirror 102, and the light that cannot be collected by the first parabolic mirror 102 is collected. An auxiliary parabolic mirror 103 having a shorter focal length than the first parabolic mirror 102 is arranged at a position where the first parabolic mirror 102 is possible.

The lamp 1 reflected by the first parabolic mirror 102
The light 401 emitted from the light emitting unit 01 is condensed on the exit aperture side of the first parabolic mirror 102.

The light 402 emitted from the light-emitting portion of the lamp 101 and reflected by the auxiliary parabolic mirror 103 does not return to the vicinity of the light-emitting portion of the lamp 101 but is collected toward the exit opening of the auxiliary parabolic mirror 103. Be lighted.

First, problems of the conventional method will be described.

FIG. 5 shows a conventional light source device when only one parabolic mirror is used. Light emitted from the light emitting unit of the lamp 101 is collected by the parabolic mirror 102. However, using only one parabolic mirror 1021 and the lamp 101
In order to converge as much as possible the light emitted from the light-emitting portion, it is necessary to make the parabolic mirror 102 considerably large in the emission direction, and the size of the light source device in the direction of the optical axis 110 is also large.
The outermost diameter in the direction perpendicular to the optical axis 110 also increases.

As shown in FIG. 6, the conventional method for reducing the size of the light source device with as high efficiency as possible is as follows.
The parabolic mirror as the first concave mirror 602 is sufficient for the lamp 6
In the case where there is an area where the light emitted from the light emitting unit 01 cannot be collected, a second concave mirror 603 having a reflecting surface facing the reflecting surface of the parabolic mirror as the first concave mirror 602 is installed.
The light that could not be collected by the first concave mirror 602 is reflected once by the second concave mirror 603, returned to the vicinity of the light emitting portion of the lamp 601 and collected by the first concave mirror 602, so that the first concave mirror 6021 This makes it possible to collect more light emitted from the light-emitting portion of the lamp than in the case. That is, light 604
Is the light emitted from the light emitting portion of the lamp 601 to the second concave mirror 603 side, and the light 605 is the light reflected by the second concave mirror 603.

Further, as shown in FIG. 7, the light source device has a configuration in which the size in the direction of the optical axis 710 is reduced, and as shown in FIG. The configuration having the second concave mirror 803 smaller than the first concave mirror 802 enables a light source device to obtain high efficiency.

However, in the conventional configuration, the light emitted from the light emitting portion of the lamp is reflected by the second concave mirror and then returned to the vicinity of the light emitting portion of the lamp again. There is a problem that light is lost by absorption, reflection, etc., due to the gas in the lamp tube, the luminous substance, and the material constituting the lamp used in a mercury lamp or the like.

On the other hand, in the light source device of the present invention, as shown in FIG.
When there is an area where the light emitted from the light emitting unit cannot be collected, the focal length of the auxiliary parabolic mirror 103 is set to the first parabolic mirror 10.
By using a lens having a focal length shorter than the focal length of 2, the auxiliary parabolic mirror 103 has a reflecting surface directed in the same direction to the inside of the first parabolic mirror 102 so that light that cannot be collected by the first parabolic mirror 102 is emitted. The auxiliary parabolic mirror 103 can be arranged at a position where light can be collected.

With the above configuration, the light can be condensed with high efficiency without increasing the outermost diameter of the first parabolic mirror 102 in the direction perpendicular to the optical axis 110 direction.

Further, light radiated from the light emitting portion of the lamp 101 reflected by the auxiliary parabolic mirror 103 is transmitted to the lamp 10.
Since the light is collected without returning to the vicinity of the light emitting portion 1, light can be collected by the gas in the lamp tube, the luminescent substance, and the material constituting the lamp 101 without being lost by absorption, reflection, or the like. Can be collected with high efficiency.

The direction of the light reflected or condensed by the auxiliary parabolic mirror 103 is such that the first parabolic mirror 103
It is not necessary to completely match the direction in which the light emitted from one light emitting unit is reflected and output, and there may be a slight shift.
In addition, the auxiliary parabolic mirror 103 emits a part of the light reflected or collected by itself, and the first parabolic mirror 103
May be output in a direction different from the direction in which the light emitted from the light emitting unit is reflected and output. In short, the auxiliary parabolic mirror 103 outputs substantially all of the light reflected or condensed in the direction in which the first parabolic mirror 103 reflects and outputs the light emitted from the light emitting portion of the lamp 101. You only have to do it.

Further, the first parabolic mirror 102 and the auxiliary parabolic mirror 103 are used with the focus coincident with the optical axis 110, so that the light radiated from the light emitting portion of the lamp can be efficiently transmitted to the optical axis 110. Can be emitted as light substantially parallel to the light.

Further, as shown in FIG. 9, since the light emitting portion 901 of the lamp is not a point light source but has a finite size, light reflected on a parabolic mirror 902 as an auxiliary parabolic mirror is used. The light from the lamp light emitting unit 901 radiated from the focal point of the parabolic mirror 902 reflects the optical axis 11
For focusing parallel to 0, the parabolic mirror 9
The light radiated from the end point of the lamp light emitting portion 901 located at a position away from the focal point of the optical axis 02 after being reflected by the parabolic mirror 902
It is not parallel to 0 but at an angle and has a spread for light emitted from the focal point.

Here, a point that intersects with the optical axis 110 when the paraboloid constituting the reflecting surface of the parabolic mirror 902 is extended is defined as a vertex 907.

Then, the angle at which the light emitted from the end point of the lamp light emitting portion 901 at a position distant from the focal point of the parabolic mirror 902 spreads with respect to the light emitted from the focal point of the parabolic mirror 902 is as follows. Light emitting part 901 of the lamp and parabolic mirror 9
02 becomes more remarkable near the opening on the vertex 907 side opposite to the opening on the exit side of the parabolic mirror which is closer to the reflection point.

That is, as for the light 903, the light emitted from the focal point of the parabolic mirror 902 from the lamp light emitting unit 901 is reflected near the opening on the vertex 907 opposite to the opening on the exit side of the parabolic mirror 902. The light flux 905 is a light
The light from No. 01 is a light flux that is spread near the opening on the vertex 907 side opposite to the opening on the parabolic mirror 902 output side. The light 904 is light obtained by reflecting light from the lamp light emitting unit 901 radiated from the focal point of the parabolic mirror 902 near the opening on the emission side of the parabolic mirror 902, and the light flux 906 is formed by the lamp light emitting unit 901. From the parabolic mirror 902, and is a light beam having a spread. As is clear from FIG. 9, the angle of spread of the light flux 905 with respect to the light emitted from the focal point is larger than that of the light flux 906.

Here, in FIG. 10, the parabolic mirror 100
When the paraboloid constituting the reflecting surface of No. 3 is extended, the optical axis 11
A point that intersects with 0 is defined as a vertex 1007.

Then, unlike the case of FIG. 9, in the light source device of the present invention, as shown in FIG. 10, the end point of the lamp light emitting portion 1001 located away from the focal point of the parabolic mirror 1003 serving as the auxiliary concave mirror is shown. The parabolic surface shape on the exit opening side where the spread angle of the emitted light with respect to the light emitted from the focal point is small is not changed, and the distance between the light emitting part 1001 of the lamp and the reflection point of the parabolic mirror 1003 is short. Object mirror 10
03 A part of the parabolic mirror 1003 near the opening on the vertex 1007 side opposite to the opening on the emission side is used as the first parabolic mirror 1002 to form a parabolic mirror with a longer focal length, so that radiation is emitted from this focal point. It becomes easy to reduce the spread angle of the light emitted from the light emitting portion 1001 of the lamp.

That is, the light beam 1004 is reflected and spread near the vertex side opening when the light from the lamp light emitting portion is near the vertex 1007 on the opposite side to the exit side opening of the auxiliary parabolic mirror 1003 when the reflecting surface exists. It is a luminous flux with. Also,
The luminous flux 1005 is a luminous flux that has light from the lamp light emitting unit and is reflected near the opening on the emission side of the auxiliary parabolic mirror 1003 and has a spread. Further, the light beam 1006 has a vertex 10 on the opposite side of the exit side opening of the first parabolic mirror 1002 when the light from the lamp light emitting unit is turned on.
This is a light beam that is reflected near the opening on the 07 side and has a spread.
As is clear from FIG.
06 has a smaller spread angle with respect to the light emitted from the focal point.

As shown in FIG. 11, the auxiliary parabolic mirror 1101 is actually formed using a member having a thickness having a reflecting surface. The tapered shape can reduce loss of light emitted from the light emitting portion of the lamp 101 and light reflected by the first parabolic mirror 102.

Further, in the light source device of the present invention, as shown in FIG. 12, since the auxiliary concave mirror 103 exists on the exit opening side of the first parabolic mirror 102, the exit aperture of the first parabolic mirror 102 is provided. When the lamp 101 is cooled, the wind sent from the emission side of the light source device can be easily exhausted to the outside through the opening behind the parabolic mirror when the lamp 101 is cooled. Is obtained.

As shown in FIG. 13, by using a plurality of auxiliary parabolic mirrors, the size of the light source device in the direction of the optical axis 110 can be reduced.

Also, as shown in FIG. 2, by arranging the light source device of the present invention and the lenses 201 and 202 (corresponding to the lens means of the present invention) at predetermined positions, the light emitted from the light source device is The illumination device according to the present embodiment that converts the light into substantially parallel light can be obtained.

Further, as shown in FIG. 3, if the above-mentioned illumination device is additionally provided with a field lens 301 (corresponding to the lens means of the present invention), a light modulation element 302 and a projection lens 303, the present embodiment can be realized. And a projection display device according to (1).

As the light modulation element 302, a reflection type light valve, a transmission type light valve, a light modulation type light modulation element, or the like can be used.

As described above, according to the present embodiment, the lamp, the first parabolic mirror, and the auxiliary parabolic mirror are provided, and the reflecting surface is directed in the same direction as the first parabolic mirror. By disposing an auxiliary parabolic mirror having a shorter focal length than the first parabolic mirror at a position where light that cannot be collected by the parabolic mirror can be collected,
The outermost diameter in the direction perpendicular to the optical axis of the auxiliary parabolic mirror does not become larger than that of the first parabolic mirror, and the light reflected by the auxiliary parabolic mirror does not return to the light emitting part of the lamp. A highly efficient and compact light source device that is condensed can be obtained.

Further, by providing a high-efficiency and small-sized light source device as described above, the use of a lamp of the same output makes it brighter, and the same brightness can be obtained by using a lamp of a lower output. It is possible to provide an illumination device and a projection display device that can reduce power.

In the above description, a parabolic mirror is used as the first concave mirror. However, a parabolic mirror having a quadratic surface, an elliptical mirror, or the like may be used as the first concave mirror. .

Further, although a parabolic mirror is used as the auxiliary concave mirror, a parabolic mirror having a quadratic curved surface, an elliptical mirror, or the like may be used as the auxiliary concave mirror.

[0074]

As described above, according to the present invention, in a light source device having light generating means and a concave mirror, a small light source device with high light use efficiency can be provided.
With this light source device, it is possible to provide a lighting device and a projection display device with high light use efficiency.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a light source device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a schematic configuration of an adjusting device according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view illustrating a schematic configuration of a projection display apparatus according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating the operation of the light source device of the present invention.

FIG. 5 is a cross-sectional view illustrating a schematic configuration when a lamp relating to a light source device and one concave mirror having a condensing angle as large as possible are used.

FIG. 6 is a cross-sectional view illustrating a schematic configuration of a first conventional example regarding a light source device.

FIG. 7 is a cross-sectional view illustrating a schematic configuration of a second conventional example regarding a light source device.

FIG. 8 is a cross-sectional view illustrating a schematic configuration of a third conventional example regarding a light source device.

FIG. 9 is a cross-sectional view illustrating an operation of light emitted from a light emitting portion of a lamp reflected by a concave mirror regarding the light source device.

FIG. 10 is a cross-sectional view illustrating an operation of light emitted from a light emitting portion of a lamp reflected by a concave mirror in the light source device according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view illustrating an example of an outer shape of an auxiliary concave mirror regarding the light source device according to the embodiment of the present invention.

FIG. 12 is a sectional view illustrating a schematic configuration of an example of a cooling method for the light source device according to the embodiment of the present invention.

FIG. 13 is a sectional view illustrating a schematic configuration of the light source device according to the embodiment of the present invention when a plurality of auxiliary concave mirrors are used.

[Explanation of symbols]

 101 arc lamp 102, 1002, 1301 first parabolic mirror 103, 1003 auxiliary parabolic mirror 110, 610, 710, 810 optical axis 201, 202, 301 lens 302 light modulating element 303 projection lens 401 light 402 light 501 large Parabolic mirror 601, 701, 801 with condensing angle Lamp 602, 702, 801 First concave mirror 603, 703, 803 Second concave mirror 604 Light 605 Light 704 Planar mirror 901, 1001 Lamp 902, Parabolic mirror 903 Light 904 Light 905 Light flux 906 Light flux 1004 Light flux 1005 Light flux 1006 Light flux 1101 Auxiliary parabolic mirror 1201 with a tapered end 1201 Fan 1202 Wind deflecting plate 1302 Auxiliary parabolic mirror divided 1 1303 Divided auxiliary parabolic mirror Object mirror 2 1304 Auxiliary parabolic mirror part 3

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/74 H04N 5/74 A // F21Y 101: 00 F21Y 101: 00

Claims (10)

[Claims] 1. A light generating means for generating light; a concave mirror for condensing outgoing light output from the light generating means; and a light generating means arranged on a side where the outgoing light is reflected by the concave mirror. An auxiliary mirror that reflects or condenses the output light output from the auxiliary mirror, wherein the auxiliary mirror outputs the light that is reflected or condensed to the concave mirror without returning the concave mirror to the concave mirror. A light source device for directly outputting the emitted light in a direction in which the emitted light is output. 2. The auxiliary mirror outputs substantially all of the light reflected or condensed in the direction in which the concave mirror outputs the outgoing light output from the light generating means. Item 2. The light source device according to Item 1. 3. The light source device according to claim 1, wherein the number of the auxiliary mirrors is one or more. 4. The light source device according to claim 1, wherein the concave mirror is a parabolic mirror or an ellipsoidal mirror having a quadratic curved surface. 5. The light source device according to claim 1, wherein the auxiliary mirror is a parabolic mirror, an elliptical mirror, or a plane mirror having a quadratic curved surface. 6. The auxiliary mirror is a parabolic mirror, the concave mirror is a parabolic mirror, and the focal length of the auxiliary mirror is shorter than the concave mirror. The light source device according to any one of the above. 7. The light source device according to claim 1, wherein the auxiliary mirror has substantially the same optical axis and focal position as those of the concave mirror. 8. The light source device according to claim 1, wherein said light generating means generates light using an arc lamp. 9. A light source device according to claim 1, further comprising: lens means for converting light condensed by said concave mirror and said auxiliary mirror into substantially parallel light. Lighting equipment. 10. The light source device according to claim 1, a lens unit that converts light condensed by the concave mirror and the auxiliary mirror into substantially parallel light, and converts the substantially parallel light into light. A projection display device comprising: a light modulation element that forms an optical image by spatially modulating; and a projection lens that projects the optical image onto a screen.