JP2007101732A - Illuminator and projection type display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illuminator capable of increasing the light quantity of a light source without increasing its size and the luminous flux cross-section and keeping the availability of light conventionally; and to provide a projection type display apparatus. <P>SOLUTION: In the illuminator and projection type display apparatus, the illuminator has the plurality of light sources and a reflector including reflector members the number of which is identical to the number of light sources. The illuminator emits light rays from the plurality of light sources in the direction of one optical axis. The reflecting face of each reflector member is a concave face divided along the rotation axis of a rotating curved face in relation to the rotating curved face that has a focal point. An emission face from which the light source emits light is disposed at the focal point of the reflecting face of the reflector member. The reflecting face of each reflector member is disposed opposite the face from which the light of the light source emits. The plurality of reflector members are disposed on a circumference around the direction of the optical axis. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an illumination device and a projection display device including a plurality of light sources and a reflector having the same number of reflector members as the light sources.

   In general, an illumination device in a projection display device or the like is composed of a light source such as an ultra-high pressure mercury lamp and a reflector whose reflecting surface for reflecting light from the light source has a paraboloidal shape or a spheroidal shape. Has been.

   In recent years, light emitting diodes, which are semiconductor light emitting elements, have been increased in luminous intensity, and lighting devices using light emitting diodes as light sources have also been proposed (see, for example, Patent Document 1).

   The figure shown in FIG. 14 shows an example of a lighting device using a conventional light emitting diode as a light source. As shown in the perspective view of FIG. 14 (a), such an illuminating device includes a reflector J1 whose reflecting surface has a parabolic shape and a light emitting diode J2 that is a light source.

   The light emitting diode J2 is arranged so that the center point of the light emitting surface of the light emitting diode J2 coincides with the focal point of the paraboloid which is the shape of the reflecting surface of the reflector J1.

   As shown in the cross-sectional view of FIG. 14B, the conventional illuminating device can emit a parallel light beam by reflecting the light emitted from the light source by the reflecting surface of the reflector. Can be used efficiently.

   On the other hand, it is desirable that the illumination device used for the projection display device has a large amount of emitted light so that a bright projection image can be formed.

In addition, the projection display device is desired to be small so that it can be easily carried. In order to reduce the size of the projection display device, it is desirable that the illumination device incorporated in the projection display device is also small.
Japanese Patent Laid-Open No. 10-335706

   In order to increase the amount of emitted light, an illumination device including a plurality of light sources and a plurality of reflectors can be considered.

   However, for example, when the lighting device has a configuration in which two sets of light sources and reflectors are arranged in parallel as shown in FIG. 14, not only does the size of the lighting device increase, but the light is emitted from the lighting device. The light beam cross-section of the light becomes wider.

   In such a case, the projection display device incorporating the illumination device needs to be designed to be larger than the illumination device having a light source and a reflector, and the screen light quantity ratio with respect to the total light emission amount of the light source. There was a problem that the calculated light utilization efficiency was poor.

   Therefore, it is difficult to reduce the size of the projection display device while using a plurality of conventional light sources and reflectors to increase the amount of light of the illumination device and to maintain the conventional light utilization efficiency. .

  Therefore, the present invention has been made in view of the above points, and it is possible to increase the light source light amount without increasing the size of the illumination device or the light beam cross section, and to maintain the conventional light use efficiency and projection. An object is to provide a mold display device.

  In order to solve the above-described problem, a first feature of the present invention includes a plurality of light sources and a reflector including the same number of reflector members as the light sources, and emits light from the plurality of light sources in one optical axis direction. The reflecting surface of the reflector member is a concave surface of a divided rotating curved surface that is divided along the rotation axis of the rotating curved surface with respect to the rotating curved surface having a focal point, and an output surface from which the light source emits light Is disposed at the focal point of the reflecting surface of the reflector member, the reflecting surface of the reflector member is disposed opposite to the light emitting surface of the light source, and the plurality of reflector members are on the circumference centered in the optical axis direction. It is the gist that it is arranged.

  Further, in the first feature of the present invention, there is provided a light source unit in which a light source is fixed to the surface of a fixed plate having a cavity inside, and the fixed plate is supplied to the cavity from the outside through a plurality of tubes. It is preferably cooled by the medium.

  In the first feature of the present invention, the reflecting surfaces of all the reflector members are divided paraboloids divided along the rotation axis of the paraboloid with respect to the paraboloid of revolution. It is preferable to reflect the emitted light as a parallel light beam in the same direction.

  In the first feature of the present invention, the reflecting surface of each reflector member is a divided spheroid divided along the rotation axis of the spheroid with respect to the spheroid, and is emitted from each opposing light source. The reflected light is preferably reflected as a condensed light beam that is collected at each focal point.

  In the first feature of the present invention, the light source unit includes one or a plurality of light source units each having a light source fixed to the front surface and the back surface of the fixing plate, and each light source unit is juxtaposed on the optical axis, Is preferably arranged parallel to the optical axis.

  In the first feature of the present invention, it is preferable that directivity control means for emitting light is disposed in the reflecting surface of the reflector member on the light emission side of the light source.

 According to this invention, since the reflecting surface of the reflector member is a surface obtained by dividing the rotating paraboloid or rotating ellipsoid that is a rotating curved surface, the size of the reflector member can be reduced, and the reflector member Since it is arrange | positioned on the periphery centering on an axial direction, the light source light quantity can be increased, without increasing the size of an illuminating device or the light beam cross section.

 Further, since the fixed plate is cooled by the cooling medium, the heat generated from the light source can be cooled by the fixed plate. Moreover, according to the illuminating device by this invention, light can be radiate | emitted with a condensing light beam or a parallel light beam.

  A second feature of the present invention is that the projection display device includes the illumination device having the first feature of the present invention, an integration unit that uniformizes the light intensity distribution of the light emitted from the illumination unit, and the integration unit is uniform. And a light modulation device that modulates the converted light.

  As described above, according to the present invention, it is possible to provide a lighting device and a projection display device that increase the light source light amount and maintain the conventional light use efficiency without increasing the size of the lighting device or the light beam cross section. can do.

(Lighting apparatus according to the first embodiment of the present invention)
An illumination device and a projection display device according to a first embodiment of the present invention will be described with reference to FIGS.

 In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between the thickness and the planar dimensions is different from the actual one. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings. Further, the following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, and arrangement of component parts. Etc. are not specified below. The technical idea of the present invention can be variously modified within the scope of the claims. First, the illumination device 10 according to the present embodiment will be described.

  The illuminating device 10 according to the present embodiment includes a light source unit in which a plurality of light sources are fixed, and a reflector including the same number of reflector members as the light sources, and reflects the light flux emitted from each light source by each reflector member. The light is reflected on the surface and emitted in one optical axis direction.

  As shown in the perspective view of FIG. 1, the illuminating device 10 includes a light source unit # 1 to which the light source # 1a and the light source # 1b are fixed, and a light source unit # 2 to which the light source # 1c and the light source # 1d are fixed. And four light sources, light sources # 1a to # 1d.

  Moreover, the illuminating device 10 is equipped with the reflector provided with four reflector members of the same number as a light source.

  Specifically, the reflector of the illumination device 10 includes a reflector member 10a1 that reflects the light beam 10a emitted from the light source # 1a, a reflector member 10b1 that reflects the light beam 10b emitted from the light source # 1b, and a light source. A reflector member 10c1 that reflects the light beam 10c emitted from the light source # 1c and a reflector member 10d1 that reflects the light beam 10d emitted from the light source # 1d are provided.

  The illumination device 10 is configured to emit light beams 10a to 10d in the direction of the optical axis L10 as shown in FIG. 1 by the light sources # 1a to # 1d and the reflector members 10a1 to 10d1 described above. ing.

  Here, as shown in FIG. 1, the optical axis L10 described above is a straight line parallel to the light beams 10a to 10d of the light emitted from the illumination device 10, and the emission direction of the light beams 10a to 10d is the direction of the optical axis L10. It is.

  Specifically, the light source units # 1 to # 2 will be described with reference to FIGS.

  In the light source unit # 1 according to the present embodiment, as shown in FIG. 2A, a light source # 1a and a light source # 1b having an emission surface are fixed on the front surface and the back surface of the fixing plate W1.

  Further, the light source unit # 1 refracts the light emitted from the light source # 1a and the light source # 1b on the light emission side of the light source # 1a and the light source # 1b, and suppresses the spread of the light beam 10a and the light beam 10b. Curved lens # 10a and lens # 10b are arranged.

  Further, in the lenses # 10a and # 10b, the centers of the curved surfaces of the lenses # 10a and # 10b are the points Pa and Pb that are the center points of the light emitting surfaces of the light sources # 1a and # 1b. Is arranged.

  Here, a distance D1 that is the sum of the thicknesses of the light source # 1a, the light source # 1b, and the fixed plate W1 is between the point Pa and the point Pb that are the center points of the light emitting surface.

  Also in the light source unit # 2 shown in FIG. 1, similarly to the light source unit # 1 described above, the light source # 1c and the light source # 1d are fixed to the front and back surfaces of the fixed plate W1, and the light from the light source # 1c and the light source # 1d On the light emission side, curved surface shaped lens # 10c and lens # 10d centering on point Pc and point Pd, which are the center points of the light emitting surfaces of light source # 1c and light source # 1d, are arranged, and luminous flux 10c and luminous flux 10d It is comprised so that the expansion of may be suppressed.

  Further, a distance D1 that is the sum of the thicknesses of the light source # 1c, the light source # 1d, and the fixing plate W1 exists between the point Pc and the point Pd that are the center points of the light emitting surface.

  The above-described lenses # 10a to # 10d are configured so that light beams 10a to 10d of light emitted from the light sources # 1a to # 1d are emitted into reflecting surfaces 10a2 to 10d2 described later.

  Further, as shown in FIG. 2B, a cavity is formed inside the above-described fixing plate W1, and light sources # 1a to # 1d are emitted by supplying a cooling medium such as water through a tube from the outside. The heat is cooled by the fixed plate W1.

  As shown in FIG. 2C, a crescent-shaped lens # 11a having a reflective surface # 11 that reflects light may be further arranged on the light emission side of the lenses # 10a to # 10d described above. Good.

  Specifically, as shown in FIG. 2C, the lens # 11a also reflects light emitted from the light sources # 1a to # 1d in the vicinity of the fixed plate W1 and not refracted by the lenses # 10a to # 10d. The light beam 11a is reflected by the surface # 10 and is emitted.

  The light sources # 1a to # 1d described above may be configured by light emitting diodes that are semiconductor light emitting elements, or may be configured by other surface light sources. A case where the light sources # 1a to # 1d in the present embodiment are light emitting diodes will be described as an example.

  Furthermore, the above-described light sources # 1a to # 1d may be configured to emit light of the same color, or light of different colors such as red (hereinafter R color), green (hereinafter G color), blue ( (B color below) etc. may be radiate | emitted.

  Here, in practice, the light source unit # 1 and the light source unit # 2 described above are configured to be supported from the outside by, for example, pipes or the like as support members. And inside the said pipe, the pipe | tube which supplies a cooling medium to the stationary plate W1, the electric wire which electrically connects light source # 1a thru | or # 1d, etc. are arrange | positioned.

  However, in this embodiment, description about the said pipe, the pipe | tube which supplies a cooling medium, and the electric wire etc. which electrically connect light source # 1a thru | or # 1d is abbreviate | omitted.

  Next, the reflector members 10a1 to 10d1 provided in the reflector in the illumination device 10 according to the present embodiment will be described.

  As shown in FIG. 1, the reflector member 10a1 has a reflecting surface 10a2, the reflector member 10b1 has a reflecting surface 10b2, the reflector member 10c1 has a reflecting surface 10c2, and the reflector member 10d1 has a reflecting surface 10c2. Is formed with a reflective surface 10d2.

  In addition, the reflecting surfaces 10a2 to 10d2 of the illumination device 10 according to the present embodiment reflect light emitted from the light sources # 1a to # 1d, and light beams 10a to 10d that are parallel beams in the direction of the optical axis L10. Is emitted.

 The reflective surfaces 10a2 to 10d2 described above are formed by vapor-depositing aluminum or the like and applying a protective film such as silicon monoxide on the vapor-deposited surface.

  As shown in FIG. 1, the reflecting surface 10a2 has a concave paraboloid region on the rotational paraboloid with the center point Pa of the light emitting surface of the light source # 1a as a focal point and a straight line parallel to the optical axis L10 as the rotational axis. And is formed so as to reflect the light beam 10a of the light emitted from the light source # 1a as a parallel light beam.

  Similarly to the reflective surface 10a2, the shapes of the other reflective surfaces 10b2 to 10d2 are rotational paraboloids with the central points Pb to Pd of the respective light emitting surfaces as focal points and a straight line parallel to the optical axis L10 as the rotation axis. The concave surface area is one shape of a split paraboloid divided into four equal parts along the rotation axis so that the light beams 10b to 10d of the light emitted from the light sources # 1b to # 1d are reflected as parallel light beams. Is formed.

  Next, regarding the arrangement of the light source units # 1 to # 2 of the illumination device 10 according to the present embodiment and the reflecting surfaces 10a2 to 10d2 formed on the reflector members 10a1 to 10d1, refer to FIGS. To explain.

  FIG. 3A is a side view of the illumination device 10 according to the present embodiment shown in the perspective view of FIG. 1, and FIG. 3B is an arrow excluding the reflector members 10b1 and 10d1 in FIG. FIG. 3C is an arrow view in the direction A, and FIG. 3C is an arrow view in the arrow direction B in FIG.

  As shown to Fig.3 (a), light source unit # 1 and light source unit # 2 of the illuminating device 10 which concern on this embodiment are juxtaposed on the coaxial of the optical axis L10.

  Specifically, as shown in FIG. 3B, the light source unit # 2 is arranged with a distance L from the light source unit # 1.

  Here, as shown in FIG. 3B, the distance L described above is an interval of at least the distance L1 so that at least the light source unit # 2 does not contact the reflector member 10a1 and the reflector member 10b1 disposed in front. Should just be provided.

  Further, as shown in FIG. 3C, in the light source unit # 1 and the light source unit # 2, the light emission surfaces of the light sources # 1a to # 1d are arranged so as to be parallel to the optical axis L10. Yes.

  Further, the light source unit # 1 and the light source unit # 2 are perpendicular to each other in the direction of the light emission surface of the light source # 1a of the light source unit # 1 and the direction of the light emission surface of the light source # 1c of the light source unit # 2. It is arranged to be.

  Similarly, the direction of the light emission surface of the light source # 1b of the light source unit # 1 and the direction of the light emission surface of the light source # 1c of the light source unit # 2 are arranged to be vertical.

  Moreover, in this illuminating device 10, the reflecting surface 10a2 of the reflector member 10a1 is disposed to face the light emitting surface of the light source # 1a in the light source unit # 1, and the reflecting surface 10b2 of the reflector member 10b1 is the light source unit # 1. Is disposed to face the light emission surface of the light source # 1b.

  Similarly, the reflecting surface 10c2 of the reflector member 10c1 is disposed to face the light emitting surface of the light source # 1c in the light source unit # 2, and the reflecting surface 10d2 of the reflector member 10d1 is the light source # 1d in the light source unit # 2. It is arranged to face the light exit surface.

  Therefore, in the illumination device 10 according to the present embodiment, the light beams 10a to 10d of the light emitted from the light sources # 1a to # 1d are reflected by the reflection surfaces 10a2 to 10d2 by the reflection surfaces 10a2 to 10d2 described above, and the optical axis All of the light beams 10a to 10d of the light are emitted as parallel light beams in the L10 direction.

  And the light beam cross section of the light radiate | emitted from this illuminating device 10 becomes a substantially circular shape.

  Specifically, as shown in the cross-sectional view of FIG. 3 (c), such an illuminating device 10 has a light beam cross section of a light beam 10a that forms a fan-shaped beam cross section 12a, and a light beam cross section of a light beam 10b that has a fan shape. A light beam cross section 12b is formed, a light beam cross section of the light beam 10c forms a fan-shaped light beam cross section 12c, and a light beam cross section of the light beam 10d forms a fan-shaped light beam cross section 12d.

  Therefore, the light emitted from the illumination device 10 forms a substantially circular light beam cross section 10abcd as shown in the cross-sectional view of FIG.

  Here, a space D2 is formed in a cross shape between the light beam cross sections 12a to 12d of the substantially circular light shown in FIG. The distance D2 is the distance D1 between the center point Pa of the light emitting surface of the light source # 1a and the center point Pb of the light emitting surface of the light source # 1b and the center point Pc of the light emitting surface of the light source # 1c shown in FIG. And the center point Pd of the light emitting surface of the light source # 1d, and the distance D2 formed between the light beam cross sections 12a to 12d becomes smaller as the distance D1 is reduced. Become.

  In addition, the illuminating device 10 which concerns on this embodiment may be the illuminating device 20, as shown in FIG. The illumination device 20 includes a light source unit # 1 and a reflector including reflector members 20a1 to 20b1.

  Moreover, in the reflector of the illuminating device 20, the reflective surface 20a2 is formed in the reflector member 20a1, and the reflective surface 20b2 is formed in the reflector member 20b1.

  Further, as shown in FIG. 4, the shapes of the reflecting surfaces 20a2 to 20b2 are focused on the light emitting surface center point Pa of the light source # 1a of the light source unit # 1 to the light emitting surface center point Pb of the light source # 1b. This is one shape of a split paraboloid that is obtained by dividing a concave paraboloid region having a straight line parallel to the axis L20 as a rotational axis into two equal parts along the rotational axis.

  The illuminating device 20 is configured to reflect the light beams 20a to 20b of the light emitted from the light source unit # 1 by the reflecting surfaces 20a2 to 20b2 of the reflector and to emit the light beams 20a to 20b which are parallel light beams. Yes.

  Furthermore, the illuminating device 10 which concerns on this embodiment may be the illuminating device 30 as shown in FIG. The illumination device 30 includes three light source units # 0 and a reflector including reflector members 30a1 to 30c1.

  Specifically, as shown in FIG. 6, in the light source unit # 0, a light source # 1a having an emission surface is fixed on the surface of the fixed plate W1.

  The light source unit # 0 includes a lens # 10a that refracts the light emitted from the light source # 1a and suppresses the spread of the light beam 10a on the light emission side of the light source # 1a.

  As shown in FIG. 5, each light source unit # 0 of the illuminating device 30 has a rotation angle in which the direction of the light exit surface of the light source # 1a of each light source unit # 0 is in the circumferential direction about the optical axis L30. Are arranged so as to be different by 120 degrees.

  Moreover, the reflector in this illuminating device 30 forms the reflective surface 30a2 in the reflector member 30a1, forms the reflective surface 30b2 in the reflector member 30b1, and forms the reflective surface 30c2 in the reflector member 30c1.

  Specifically, as shown in FIG. 5, the shapes of the reflecting surfaces 30a2 to 30c2 are focused on the center point Pa of the light emitting surface of the light source # 1a of the light source unit # 1, and a straight line parallel to the optical axis L30 is a rotation axis. The concave paraboloid region of the rotating paraboloid is divided into three equal parts along the rotation axis.

  Further, the reflection surfaces 30a2 to 30c2 described above are arranged to face the emission surface of the light source # 1a of each light source unit # 0.

  The illuminating device 30 is configured to reflect the light beams 30a to 30c emitted from the three light source units # 0 by the reflecting surfaces 30a2 to 30c2 and emit the light beams 30a to 30c which are parallel beams. Yes.

  Next, the configuration of the projection display apparatus according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 7, the projection display device is a three-plate projection display device, and includes an optical device 100R, an optical device 100G, an optical device 100B, a dichroic cross prism 106, and a projection lens 107. It has.

  The optical device 100R includes an illumination device 10R, an integrator lens 101, a polarizing beam splitter 102, a condenser lens 103, a polarizing plate 104, and a light modulation device 105.

  The illumination device 10R is configured to emit R-color light beams 10a to 10d, which are parallel light beams, from the above-described light source units # 1 to # 2.

  The integrator lens 101 uses a fly-eye lens, and is configured to receive the light beams 10a to 10d of the light emitted from the illumination device 10R, and to emit the light with a uniform light intensity distribution.

  The polarizing beam splitter 102 is a prism array type polarizing beam splitter, and is configured to receive light whose light intensity distribution is made uniform by the integrator lens 101 and emit light having a uniform polarization direction.

  The condenser lens 103 is configured so that light having a uniform polarization direction is incident on the polarizing beam splitter 102 and condensed.

  The polarizing plate 104 is arranged on the light incident side and the light emitting side with respect to the light modulation device 105, and the polarization direction is aligned between the light collected by the condenser lens 103 and the light modulated by the light modulation device 105 described later. It is configured to transmit only light.

  The light modulation device 105 uses a liquid crystal panel, and is configured to modulate light having a uniform polarization direction by the polarizing plate 104 and emit the modulated light (image light).

  The optical device 100G has a configuration similar to the optical device 100R except for the illumination device 10G. Therefore, only the configuration of the illumination device 10G will be described.

  The illumination device 10G is configured to emit G-color light beams 10a to 10d that are parallel light beams from the above-described light source units # 1 to # 2.

  The optical device 100B has a configuration similar to the optical device 100R except for the illumination device 10B. Therefore, only the configuration of the illumination device 10B will be described.

  The illumination device 10B is configured to emit B-color light beams 10a to 10d, which are parallel light beams, from the above-described light source units # 1 to # 2.

  The dichroic cross prism 106 is configured to synthesize and emit the R, G, and B color image lights emitted from the optical device 100R, the optical device 100G, and the optical device 100B.

  The projection lens 107 is configured to enlarge and project the image light combined by the dichroic cross prism 106 onto a projection surface such as a screen.

(Operation / Effect of Illumination Device 10 and Projection Display Device According to this Embodiment)
According to the illuminating device 10 according to the present embodiment, light beams 10a to 10d are emitted from the four light sources # 1a to # 1d to increase the amount of light, and are arranged on the circumference around the optical axis. The reflected light is reflected by the reflecting surfaces 10a2 to 10d2 of the reflector members 10a1 to 10d1, and the light beam cross section of each light beam emitted in the optical axis direction is formed into a fan shape, so that the light beam is larger than when four conventional illumination devices are used. The cross section can be reduced.

  In addition, the reflecting surfaces 10a2 to 10d2 are divided paraboloids and divided ellipsoidal surfaces obtained by dividing the rotating paraboloid and rotating ellipsoid, which are rotating curved surfaces, along the rotation axis, and therefore, four conventional illumination devices are used. It is possible to reduce the size of the lighting device 10 as compared with the case where it is done.

  In addition, the illumination device 10 can arrange the reflecting surfaces 10a2 to 10d2 close to the optical axis direction by juxtaposing the light source unit # 1 and the light source unit # 2 on the optical axis. It is possible to make the cross section of the light beam smaller.

  Therefore, according to the illuminating device 10 which concerns on this embodiment, the light quantity of light can be increased, without increasing the size of an illuminating device, or the light beam cross section of light.

  Further, according to the projection display device according to the present embodiment, the image light with the light source amount increased and the conventional light use efficiency maintained without increasing the size of the lighting device 10 to be incorporated or the optical path width of the light. Can be projected.

(Modification 1)
With reference to FIG. 8, the illumination device and the projection display device according to the first modification will be described by focusing on the differences from the illumination device 10 and the projection display device according to the first embodiment.

 As shown in FIG. 8, the projection display device according to the present embodiment is a single-plate projection display device, and includes an illumination device 10RGB, an integrator lens 101, a polarization beam splitter 102, a condenser lens 103, and a polarization device. A plate 104, a light modulation device 105, a dichroic cross prism 106, and a projection lens 107 are provided.

 Here, the illumination device 10RGB and the projection display device according to the present embodiment are the same as those in the first embodiment except for the illumination device 10RGB and the light modulation device 105. Therefore, the illumination device 10RGB and the light modulation device 105 according to this embodiment will be mainly described.

  The illuminating device 10RGB is configured to emit light of parallel light beams of R color, G color, and B color while switching in a time division manner so as not to overlap.

  Specifically, the illumination device 10RGB is configured such that the light source # 1a included in the light source unit # 1 emits R-color light, and the light source # 1b is configured to emit B-color light. The light sources # 1c and # 1d included in the light source unit # 2 are configured to emit G light.

  Note that the above-described light sources # 1a to # 1d may be configured to emit light of different colors of R, G, or B from any one of the light sources. In addition, the above-described light sources # 1a to # 1d are configured so that R color light is emitted from two light sources (for example, the light sources # 1a to # 1b) among the R color, G color, and B color light described above. You may be comprised, and you may be comprised so that the light of B color may radiate | emit from two light sources.

  Further, the optical modulation device 105 shown in FIG. 8 modulates light corresponding to the switching timing of each color light of R, G, or B emitted from the illumination device 10 RGB, and emits the modulated light (video light). It is configured as follows.

  According to the illuminating device 10RGB according to the present embodiment, the light source light amount can be increased without increasing the size of the illuminating device or the light beam cross section.

  In addition, according to the projection display apparatus according to the present embodiment, it is possible to project image light that increases the light source light amount and maintains the conventional light use efficiency without increasing the optical path width of the light.

  In addition, since the illumination device 10RGB can emit each color light of RGB in a time division manner, it is not necessary to provide a color filter.

(Modification 2)
With reference to FIGS. 9 to 10, the illumination device and the projection display device according to the modified example 2 will be described by focusing on differences from the illumination device 10 and the projection display device according to the first embodiment.

  First, the illumination device 40 according to the present embodiment will be described with reference to FIG. As shown in FIG. 9, the reflector in the illuminating device 40 is different from the illuminating device 10 according to the first embodiment in that the reflecting surfaces 40a2 to 40d2 are formed on the reflector members 10a1 to 10d1. Therefore, the reflection surfaces 40a2 to 40d2 will be described.

  As shown in FIG. 9, the shapes of the reflecting surfaces 40a2 to 40d2 are focused on the center points Pa to Pd of the light emitting surfaces of the light sources # 1a to # 1d of the light source unit # 1 and rotate on a straight line parallel to the optical axis L40. This is a partial shape of the divided spheroid obtained by dividing the concave area of the spheroid as an axis into four equal parts along the axis of rotation.

  Therefore, the shape of the reflective surfaces 40a2 to 40d2 in the illumination device 40 is different from the shape of the reflective surfaces 10a2 to 10d2 in the illumination device 10.

  In addition, the illuminating device 40 reflects the light beams 40a to 40b of the light emitted from the light source units # 1 to # 2 by the reflecting surfaces 40a2 to 40d2, and condenses them to the collection points a to d as shown in FIG. Light beams 40a to 40d, which are light beams, are emitted.

  Here, the above-mentioned collecting points a to d exist on the same plane perpendicular to the optical axis L40. Therefore, the distance between the center point Pa (or Pb) of the light emitting surface in the light source unit # 1 and the focal point a (or b), the center point Pc (or Pd) of the light emitting surface in the light source unit # 2, and the focal point c ( Or the distance between d) is different.

  Therefore, the reflecting surfaces 40a2 to 40b2 rotate with the center points Pa and Pb of the light emitting surfaces of the light sources # 1a and # 1b of the light source unit # 1 as the first focal point and the collecting points a and b as the second collecting point. This is a partial shape of the ellipsoid # 1 (not shown).

  The reflecting surfaces 40c2 to 40d2 rotate with the center points Pc and Pd of the light emitting surfaces of the light sources # 1c and # 1d of the light source unit # 2 as the first focal point and the collecting points c to d as the second collecting point. The ellipsoid # 1 is a partial shape of a spheroid # 2 (not shown) having a different distance from the first focus to the second focus.

  Next, the projection display apparatus according to this embodiment will be described.

  As shown in FIG. 10, the projection display device according to the present embodiment is a three-plate projection display device, and includes an optical device 400R, an optical device 400G, an optical device 400B, a dichroic cross prism 106, and a projection. And a lens 107.

  The optical device 400R includes an illumination device 40R, an integrator lens 101, a polarizing beam splitter 102, a condenser lens 103, a polarizing plate 104, a light modulation device 105, and a collimator lens 108.

 Here, the illumination device 40 and the projection display device according to the present embodiment are the same as those of the first embodiment except for the illumination device 40 and the collimator lens 108. Accordingly, the illumination devices 40R to 40B and the collimator lens 108 according to the present embodiment will be mainly described.

  As shown in FIG. 10, the illuminating device 40R is configured to emit light beams 10a to 10d of R color light, which are condensed light beams, from the light source units # 1 to # 2 of the illuminating device 40 described above.

  The optical device 400G has a configuration similar to that of the optical device 400R except for the illumination device 40G. Therefore, only the configuration of the illumination device 40G will be described.

  The illuminating device 40G is configured to emit G-color light beams 10a to 10d, which are condensed light beams, from the light source units # 1 to # 2 of the illuminating device 40 described above.

  The optical device 400B has a configuration similar to the optical device 400R except for the illumination device 40B. Therefore, only the configuration of the illumination device 40B will be described.

  The illuminating device 40B is configured to emit B-color light beams 10a to 10d, which are condensed light beams, from the light source units # 1 to # 2 of the illuminating device 40 described above.

  The collimator lens 108 is configured to receive light emitted from the illumination devices 40R to 40B and emit light of a parallel light flux.

  According to the illuminating device 40 and the projection display device according to the present embodiment, the illuminating device 40 can emit the light of the condensed light flux from the four light sources of the light sources # 1a to # 1d. The amount of light can be increased without increasing the size or the light beam cross section.

  Further, according to the illumination device 40 according to the present embodiment, since it is possible to emit the light of the condensed light beam, components such as the integrator lens 101, the polarization beam splitter 102, and the condenser lens 103 can be reduced in size. In addition, it is possible to reduce the size of a projection display device incorporating the component.

  In addition, according to the projection display device according to the present embodiment, image light that increases the light source light amount and maintains the conventional light use efficiency without increasing the size of the lighting device to be incorporated or the optical path width of the light is projected. can do.

(Modification 3)
With reference to FIG. 11, the illumination device and the projection display device according to the modification example 3 will be described by focusing on differences from the illumination device 10 according to the modification example 1 and the projection display device.

 As shown in FIG. 11, the projection display device according to the present embodiment is an example in which the illumination device 10RGB of the single-plate projection display device shown in Modification Example 1 is changed to an illumination device 40RGB and a collimator lens 108 is provided. It is.

 Here, the illumination device 40RGB and the projection display device according to the present embodiment are the same as those of the first modification except for the illumination device 40RGB and the collimator lens 108. Therefore, the illumination device 40RGB and the collimator lens 108 according to the present embodiment will be mainly described.

  The illuminating device 40RGB is configured to emit the light of the condensed light beams of R, G, and B in a time-division manner so as not to overlap.

  Specifically, the illumination device 10RGB is configured such that the light source # 1a included in the light source unit # 1 emits R-color light, and the light source # 1b is configured to emit B-color light. The light sources # 1c and # 1d included in the light source unit # 2 are configured to emit G light.

  Note that the above-described light sources # 1a to # 1d may be configured to emit light of different colors of R, G, or B from any one of the light sources. In addition, the above-described light sources # 1a to # 1d are configured so that R color light is emitted from two light sources (for example, the light sources # 1a to # 1b) among the R, G, and B light described above. You may be comprised, and you may be comprised so that the light beam of B color may radiate | emit from two light sources.

  Further, the collimator lens 108 shown in FIG. 11 is configured to receive light emitted from the illumination devices 40RGB and emit light of a parallel light flux.

  According to the illumination device 40RGB and the projection display device, the light amount of the condensed light beam can be increased without increasing the size of the illumination device and the light beam cross section.

  In addition, according to the projection display device according to the present embodiment, image light that increases the light source light amount and maintains the conventional light use efficiency without increasing the size of the lighting device to be incorporated or the optical path width of the light is projected. can do.

  In addition, since the illumination device 40RGB can emit light of each color of RGB in a time division manner, it is not necessary to provide a color filter.

(Modification 4)
With reference to FIG. 12, the illumination device and the projection display device according to the modification example 4 will be described focusing on differences from the illumination device 40RGB and the projection display device according to the modification example 3.

 As shown in FIG. 12, the projection display device according to this embodiment includes an illumination device 40RGB, a rod integrator 109, a condenser lens 301, reflection mirrors 302 and 303, a light modulation device 304, and a projection lens 107. It comprises. Since the illuminating device 40RGB is the same as the illuminating device 40RGB according to the modification example 3, the description thereof is omitted.

  The rod integrator 109 is configured to uniformize the illuminance of incident light and emit the light.

  The condenser lens 301 is configured so that light whose illuminance is uniformed by the rod integrator 109 is incident, condensed, and emitted.

  The reflection mirrors 302 and 303 are configured to reflect the light collected by the condenser lens 301 and output the light to a light modulation device to be described later.

 As the light modulation device 304, a digital micromirror device (hereinafter, DMD) is used.

  Here, the DMD is an assembly of movable micro mirrors, and is configured to form an image source on a display body according to the reflected light of each mirror of incident light. Specifically, the DMD is covered with a number of micro mirrors corresponding to the number of pixels, and the light is reflected on each mirror whose inclination is controlled based on the video signal. It is configured to modulate light.

  Since the projection lens 107 is the same as the projection lens 107 according to the third modification, description thereof is omitted.

  According to the illumination device 40RGB and the projection display device, the light amount of the condensed light beam can be increased without increasing the size of the illumination device and the light beam cross section.

  In addition, according to the projection display device according to the present embodiment, image light that increases the light source light amount and maintains the conventional light use efficiency without increasing the size of the lighting device to be incorporated or the optical path width of the light is projected. can do.

  In addition, since the illuminating device 40RGB can emit light of each color of RGB in a time division manner, it is not necessary to provide a color wheel.

(Modification 5)
With reference to FIG. 13, the illumination device and the projection display device according to the modification example 4 will be described focusing on differences from the illumination device 40RGB and the projection display device according to the modification example 4.

 As shown in FIG. 13, the projection display device according to this embodiment includes an illumination device 40RGB, a rod integrator 109, an optical system 401, optical path separation prism systems 402 and 409, and color separation / combination prism systems 403 to 405. And light modulation devices 406 to 408 and a projection lens 107.

 The illumination device 40RGB is different from the illumination device 40RGB according to the modified example 4 in that the light of each color of RGB is emitted but is not emitted in a time division manner.

 Since the rod integrator 109 is the same as the rod integrator 109 according to the modification example 4, the description thereof is omitted.

 The optical system 401 uses an optical system for digital light processing (DLP (registered trademark)), and is configured to emit light emitted from the rod integrator 109 to an optical path separation prism described later. .

 The optical path separation prism systems 402 and 409 are configured to receive the light emitted from the optical system 401 and reflect it to the color separation / combination prism systems 403 to 405.

 In the color separation / combination prism systems 403 to 405, a dichroic layer that reflects only B-color light is formed on the boundary surface between the prisms 403 and 404, and a dichroic layer that reflects only R-color light is reflected on the boundary surface between the prism 404 and the prism 405. Is formed.

 Then, the color separation / combination prism systems 403 to 405 separate the incident light into R, G, and B color lights, respectively, and each of them is an R light modulation device 407, a G light modulation device 406, The light is reflected to the B light modulation device 408.

 Further, the color separation / combination prism systems 403 to 405 are configured to combine the RGB color lights reflected by the light modulation devices 406 to 408 by reflection and to output them to the projection lens 107.

 The light modulation devices 406 to 408 use DMDs, and are configured to reflect modulated light (video light) by modulating R color light, G color light, and B color light.

 The projection lens 107 is configured to enlarge and project the image light synthesized by the color separation / synthesis prism systems 403 to 405 onto a projection surface such as a screen.

  According to the illumination device 40RGB and the projection display device, the light amount of the condensed light beam can be increased without increasing the size of the illumination device and the light beam cross section.

  In addition, according to the projection display device according to the present embodiment, image light that increases the light source light amount and maintains the conventional light use efficiency without increasing the size of the lighting device to be incorporated or the optical path width of the light is projected. can do.

It is a perspective view of the illuminating device 10 which concerns on this embodiment. (A) It is a figure which shows the light source unit of the illuminating device 10 which concerns on this embodiment. (B) It is a figure which shows the light source unit of the illuminating device 10 which concerns on this embodiment. (C) It is a figure which shows an example of the light source lens of the illuminating device 10 which concerns on this embodiment. (A) It is a side view of the illuminating device 10 which concerns on this embodiment. (B) It is an arrow view of the A direction of the illuminating device 10 which concerns on this embodiment. (C) It is an arrow view of the B direction of the illuminating device 10 which concerns on this embodiment. It is a perspective view of the illuminating device 20 which concerns on this embodiment. It is a perspective view of the illuminating device 30 which concerns on this embodiment. It is a figure which shows an example of the light source unit in the illuminating device 10 which concerns on this embodiment. 1 is a conceptual configuration diagram illustrating a three-plate projection display device according to an embodiment. It is a schematic block diagram which shows the single-plate-type projection display apparatus which concerns on the example 1 of a change of this embodiment. It is a perspective view of the illuminating device 40 which concerns on the modification 2 of this embodiment. It is a schematic block diagram which shows the 3 plate type | mold projection display apparatus which concerns on the modification 2 of this embodiment. It is a schematic block diagram which shows the single plate type projection display apparatus which concerns on the modification 3 of this embodiment. It is a schematic block diagram which shows the single plate type projection display apparatus which concerns on the modification 4 of this embodiment. It is a schematic block diagram which shows the single plate type projection display apparatus which concerns on the modification 5 of this embodiment. (A) It is a schematic block diagram which shows the illuminating device in a prior art. (B) It is sectional drawing which shows the illuminating device in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Illuminating device, 20 ... Illuminating device, 30 ... Illuminating device, 40 ... Illuminating device, L10-L40 ... Optical axis, # 1- # 2 ... Light source unit, # 1a- # 1d ... Light source, 10a-10d ... Light beam, 20a-20d ... light beam, 30a-30d ... light beam, 40a-40d ... light beam, 11a ... light beam, 10a1-10d1 ... reflector member, 10a2-10d2 ... reflective surface, 20a1-20d1 ... reflector member, 20a2-20d2 ... reflective surface, 30a1 to 30d1 ... reflector member, 30a2 to 30d2 ... reflective surface, 40a2 to 40d2 ... reflective surface, # 11 ... reflective surface, A ... direction, B ... direction, # 10a- # 10d ... lens, # 11a ... lens, 12a- 12d: Light beam cross section, 10abcd: Light beam cross section, Pa to Pd: Center point of light emitting surface, a: d: Focus, D1-D2: Distance, 100R: Optical device DESCRIPTION OF SYMBOLS 100G ... Optical apparatus, 100B ... Optical apparatus, 10R ... Illuminating apparatus, 10G ... Illuminating apparatus, 10B ... Illuminating apparatus, 40R ... Illuminating apparatus, 40G ... Illuminating apparatus, 40B ... Illuminating apparatus, 400R ... Optical apparatus, 400G ... Optical apparatus, 400B ... Optical device, 10RGB ... Illumination device, 40RGB ... Illumination device, 101 ... Integrator lens, 102 ... Polarizing beam splitter, 103 ... Condenser lens, 104 ... Polarizing plate, 105 ... Light modulation device (liquid crystal panel), 106 ... Dichroic cross Prism, 107 ... projection lens, 108 ... collimator lens, 108 ... rod integrator, 301 ... collimator lens, 302, 303 ... reflection mirror, 304 ... light modulator, 402, 403, 404, 405, 409 ... color separation / synthesis prism system , 402, 409 ... optical path Prism system, 404,406,407,408 ... optical modulator (DMD), J1 ... light-emitting diodes, J2 ... reflector

Claims (7)

A lighting device comprising a plurality of light sources and a reflector including the same number of reflector members as the light sources, and emitting light from the plurality of light sources in one optical axis direction,
The reflecting surface of the reflector member is a concave surface of a divided rotational curved surface divided along the rotational axis of the rotational curved surface with respect to the rotational curved surface having a focal point,
The emission surface from which the light source emits light is disposed at the focal point of the reflection surface of the reflector member,
The reflecting surface of the reflector member is disposed to face the light emitting surface of the light source,
The said reflector member is arrange | positioned on the circumference centering on the said optical axis direction, The illuminating device characterized by the above-mentioned. Comprising a light source unit in which the light source is fixed on the surface of a fixed plate having a cavity inside;
The lighting device according to claim 1, wherein the fixing plate is cooled by a cooling medium supplied to the cavity from the outside through a plurality of tubes.   The reflecting surfaces of all the reflector members are divided rotating paraboloids divided along the rotation axis of the rotating paraboloid with respect to the rotating paraboloid, and the same light is emitted from the light source. The illuminating device according to claim 1, wherein the illuminating device is reflected as a parallel light beam in a direction.   The reflection surface of each reflector member is a divided spheroid divided along the rotation axis of the spheroid with respect to the spheroid, and the light emitted from each of the opposed light sources is focused on each focal point. The illuminating device according to claim 1, wherein the illuminating device is reflected as a condensed light beam that is condensed on the light source. Comprising one or a plurality of light source units in which the light source is fixed to the front and back surfaces of the fixing plate;
Each light source unit is juxtaposed on the optical axis,
5. The illumination device according to claim 2, wherein the emission surfaces of the light sources are arranged in parallel with the optical axis.   6. The illumination device according to claim 1, wherein directivity control means for emitting light is disposed in a reflection surface of the reflector member on a light emission side of the light source. . The lighting device according to any one of claims 1 to 6,
An integrating means for uniformizing the light intensity distribution of the light emitted from the illumination device;
A projection display device comprising: a light modulation device that modulates the uniformized light by the integration means.