JP2012178319A - Lighting device and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a long-life, silent and low-cost lighting device with a simple structure.SOLUTION: The lighting device includes a phosphor array 3 having a plurality of segment areas, where phosphors 3r, 3g, and 3b irradiated with excited light for emitting light of the same wavelength; a plurality of solid light sources 1a arranged for the segment areas and irradiating the phosphors arranged on the segment areas with the excited light; lighting optical systems 4 to 9 for superposing lighting areas formed by the light from the phosphors; and a switching mechanism for switching the phosphors which emit excited light by controlling the solid light sources.

Description

  The present invention relates to an illumination device that emits light by irradiating a phosphor with excitation light from a solid light source, and a display device using the illumination device, and relates to a technique that can be applied to, for example, a projector that enlarges and projects an image. It is.

  For example, as a light source of a single-plate projector device using a digital micromirror device (DMD) in Patent Document 1, a color wheel in which RGB fluorescent materials excited by an ultraviolet wavelength laser light source are applied for each segment is used as a motor. There has been proposed a light source device for a projector that is configured to be rotated by a projector.

JP 2004-341105 A

  By the way, the conventional illumination device has a problem that the phosphor is damaged by the irradiation of the excitation light, the luminance of the illumination light is degraded, and the life of the phosphor is shortened by the irradiation of the excitation light for a long time. Further, since it is necessary to rotate the color wheel at a high speed by the motor, the configuration becomes complicated and the cost becomes high, and the life of the motor and noise due to the rotation sometimes become a problem.

  In consideration of the above circumstances, an object of the present invention is to provide a lighting device that has a simple configuration, has a long life, has high silence, and is low in cost.

  In order to solve the above-mentioned problem, the illumination device of the invention of claim 1 has a plurality of segment regions, and each segment region is irradiated with excitation light and emits light of the same wavelength (3r, 3g). , 3b) and the phosphors (3r, 3g, 3b) provided corresponding to the plurality of segment regions and arranged in the segment regions, respectively, are irradiated with excitation light. A plurality of solid state light sources (1a), an illumination optical system (4-9) for superimposing illumination areas by light from the respective phosphors (3r, 3g, 3b), and the solid state light source (1a) And a switching mechanism for switching phosphors (3r, 3g, 3b) that emit excitation light.

  The invention of claim 2 is the illumination device according to claim 1, wherein the segment regions of a plurality of groups are provided, and the plurality of segment regions belonging to the first group are irradiated with excitation light. A first phosphor (3r) that emits light of the same first wavelength among the three primary colors is arranged, and the plurality of segment regions belonging to the second group are irradiated with excitation light to thereby emit the three primary colors. A second phosphor (3g) that emits light having the same second wavelength different from the first wavelength is arranged, and a plurality of segment regions belonging to the third group are irradiated with excitation light. And a third phosphor (3b) that emits light of a third same wavelength different from the first wavelength and the second wavelength of the three primary colors, respectively, and the switching mechanism is configured to transmit the first group. The first phosphor belonging to (3 ) And wherein the switching between the third phosphor second phosphor belonging to the second group and (3 g) belonging to the third group (3b).

  The illuminating device of the invention of claim 3 has a plurality of groups of segment areas, and the plurality of segment areas belonging to the first group are irradiated with excitation light, whereby the first same wavelength of the three primary colors is obtained. The first phosphors (3r) that emit light of the first and second wavelengths are arranged, and the plurality of segment regions belonging to the second group are irradiated with excitation light, so that the first wavelengths of the three primary colors differ from the first wavelength. A second phosphor (3g) that emits light having the same wavelength, and a diffuser plate (P) instead of the phosphor in a plurality of segment regions belonging to the third group ( 23), which is provided corresponding to each of the segment regions, emits light of a third wavelength different from the first wavelength and the second wavelength of the three primary colors, and the segment region of the first group Second group segment The one corresponding to the region irradiates the first phosphor (3r) and the second phosphor (3g) with the light of the third wavelength as excitation light, and corresponds to the segment region of the third group. A plurality of solid-state light sources (1b) configured to directly irradiate light of the third wavelength through the transparent region (P), light from each of the phosphors (3r, 3g), and An illumination optical system (4-9) that superimposes illumination areas with light transmitted through the diffusion plate (P), and the phosphor substrate (23) that controls the solid light source (1b) to emit excitation light. And a switching mechanism for switching groups.

  The illumination device according to a fourth aspect of the present invention is a solid-state light source (1a) that emits excitation light and phosphors (3r1, 3r2, 3r3, 3g1, 3g2) that emit light upon irradiation with excitation light from the solid-state light source (1a). , 3g3, 3b1, 3b2, 3b3) and the solid state light source (1a) and the phosphor substrate (33) are moved relative to each other to thereby move the phosphors (3r1, 3r2, 3r3). , 3g1, 3g2, 3g3, 3b1, 3b2, 3b3), and a shift mechanism (35) for shifting the irradiation position of the excitation light by the solid-state light source (1a).

  A fifth aspect of the present invention is the illumination device according to the fourth aspect, wherein the phosphor substrate (33) is provided in a replaceable manner.

  The invention of claim 6 is the illumination device according to claim 4 or 5, wherein the phosphor substrate (33) has a plurality of group segment areas, and a plurality of segment areas belonging to the first group. The first phosphors (3r1, 3r2, 3r3) that emit light of the first same wavelength among the three primary colors by being irradiated with excitation light are respectively arranged, and a plurality of segments belonging to the second group Second phosphors (3g1, 3g2, 3g3) that emit light of the second same wavelength different from the first wavelength among the three primary colors by being irradiated with excitation light are disposed in the regions, respectively. A third phosphor that emits light of a third same wavelength different from the first wavelength and the second wavelength of the three primary colors by irradiating a plurality of segment regions belonging to the group 3 with excitation light (3b1, 3b2, 3b ), And the solid-state light source (1b) irradiates the phosphors (3r1, 3r2, 3r3, 3g1, 3g2, 3g3, 3b1, 3b2, 3b3) disposed in the segment regions, respectively. A plurality of segment areas corresponding to each of the plurality of segment areas, and an illumination area by light from each of the phosphors (3r1, 3r2, 3r3, 3g1, 3g2, 3g3, 3b1, 3b2, 3b3) is overlapped. Switching for switching the illumination optical system (4-9) to be combined and the phosphors (3r1, 3r2, 3r3, 3g1, 3g2, 3g3, 3b1, 3b2, 3b3) that emit the excitation light by controlling the solid-state light source (1a) And a mechanism.

A seventh aspect of the present invention is the illumination device according to the sixth aspect, wherein the switching mechanism includes a first phosphor (3r) belonging to the first group and a second fluorescence belonging to the second group. The body (3g) and the third phosphor (3b) belonging to the third group are switched.

  The invention of claim 8 is the illuminating device according to claim 4 or 5, wherein the phosphor substrate has a plurality of segment regions and excitation is performed on the plurality of segment regions belonging to the first group. The first phosphors (3r1, 3r2, 3r3) that emit light of the first same wavelength among the three primary colors by being irradiated with light are respectively arranged, and in a plurality of segment regions belonging to the second group, Second phosphors (3g1, 3g2, 3g3) that emit light of the second same wavelength different from the first wavelength among the three primary colors by being irradiated with excitation light are respectively arranged, and a third group A diffuser plate (P) is arranged in place of the phosphor in a plurality of segment regions belonging to the above, while the solid light source (1b) is different from the first wavelength and the second wavelength of the three primary colors Emits light of the third wavelength As described above, a plurality of segments corresponding to each segment region and corresponding to the segment region of the first group and the segment region of the second group have the light of the third wavelength as excitation light. The first phosphor (3r1, 3r2, 3r3) and the second phosphor (3g1, 3g2, 3g3) are irradiated and the one corresponding to the segment region of the third group is transmitted through the diffusion plate (P). Then, the light having the third wavelength is directly irradiated, and the light from each of the phosphors (3r1, 3r2, 3r3, 3g1, 3g2, 3g3) and the light transmitted through the diffusion plate (P) And an illumination optical system (4-9) for superimposing the illumination areas and a switching mechanism for switching the group on the phosphor substrate that emits excitation light by controlling the solid-state light source. Features.

  A display device according to a ninth aspect of the invention includes the illumination device according to any one of the first to eighth aspects, a display element (13) that modulates illumination light from the illumination device according to an image, and the display. A projection optical system (15) for projecting an image emitted from the element (13) onto a screen.

  According to the illuminating device of the first to third aspects of the present invention, it is possible to suppress deterioration of the phosphor due to excitation light irradiation by switching the phosphor that irradiates excitation light. In addition, the lifetime of the phosphor can be increased. In addition, a solid-state light source is arranged corresponding to each segment area where phosphors are arranged, eliminating the need for complicated mechanisms such as rotating the color wheel with a motor, simplifying the configuration, and reducing costs. In addition, since a motor is not required, quietness can be maintained. In addition, since it is not necessary to keep the same solid light source in a constantly lit state, the life of the solid light source can be extended.

  According to the illumination device of the fourth to eighth aspects of the present invention, the phosphor can be refreshed by switching the irradiation position of the excitation light to the phosphor by the shift mechanism after a predetermined usage time has elapsed. In addition, it is possible to suppress the luminance deterioration of the illumination light and to extend the life of the phosphor. In addition, since the phosphor substrate and the solid state light source are simply moved relative to each other, a complicated mechanism such as rotating the color wheel with a motor is not required, the configuration can be simplified and the cost can be reduced, and a motor is not required. Therefore, silence can be maintained.

  Therefore, according to the display device of the ninth aspect, since the illumination device of any one of the first to eighth aspects is used, the same effect can be obtained.

It is a schematic block diagram of the illuminating device of 1st Embodiment of this invention. It is a schematic block diagram of the projection type display apparatus using the said illuminating device. (A)-(c) is a front view which respectively shows the structure of the light source array used for the same illuminating device, a fluorescent substance array, and a multi lens array. (A)-(c) is a front view which each shows the structure of the light source array used for the illuminating device of 2nd Embodiment of this invention, a fluorescent substance array, and a multi lens array. It is explanatory drawing of the illuminating device of 3rd Embodiment of this invention, (a) is a schematic block diagram of the principal part of the illuminating device, (b) is a front view of the fluorescent substance array used for the illuminating device. It is a schematic block diagram of the illuminating device of the said 3rd Embodiment. (A)-(c) is a front view which respectively shows the structure of the light source array used for the same illuminating device, a fluorescent substance array, and a multi lens array. (A)-(c) is a front view which each shows the structure of the light source array used for the illuminating device of 4th Embodiment of this invention, a fluorescent substance array, and a multi lens array. It is a front view which shows the structure of the fluorescent substance array used for the illuminating device of 5th Embodiment of this invention, and its support mechanism. It is a schematic block diagram of the illuminating device of 6th Embodiment of this invention. It is a schematic block diagram of the projection type display apparatus using the said illuminating device. (A)-(c) is a front view which respectively shows the structure of the light source array used for the same illuminating device, a fluorescent substance array, and a multi lens array.

  Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic configuration diagram of the illumination device according to the first embodiment, FIG. 2 is a schematic configuration diagram of a projection display device using the illumination device, and FIGS. 3A to 3C are used for the illumination device. It is a front view which shows the structure of a light source array, a fluorescent substance array, and a multi lens array, respectively.

  As shown in FIG. 1, the illuminating device includes a light source array 1 in which a plurality of solid light sources 1a made of a semiconductor laser that generates ultraviolet light or near-ultraviolet light (for example, a 405 nm laser) are arrayed on a substrate 1k. A plurality of collimator lenses 2 for condensing the light emitted from each solid-state light source 1a, and an R phosphor 3r and a G phosphor for emitting light in the wavelength bands of the three primary colors on the condensing surface of the collimator lens 2 on the transparent substrate 3k. 3g, a phosphor array 3 in which B phosphors 3b are arranged in an array, a collimator lens 4 that is an optical element for adjusting the light emitted from each phosphor 3r, 3g, 3b, multi-lens arrays 5, 6, and a multi-lens array 6 is composed of a polarization conversion element 7 disposed on the exit side and converting incident light into substantially linearly polarized light, and field lenses 8 and 9 disposed on the exit side of the polarization conversion element 7. That.

  The luminous fluxes emitted from the phosphors 3r, 3g, and 3b are adjusted by the collimator lens 4 and then pass through the lens segments 5a arranged on the substrate 5k of the multi-lens array 5, so that the multi-lens array 6, the field lens 8, 9, after being superimposed on a predetermined illumination area, it reaches the illumination target portion as illumination light. Here, optical elements such as the collimator lens 4, the multi-lens arrays 5 and 6, and the field lenses 8 and 9 constitute an illumination optical system that superimposes illumination areas by light from the phosphors 3 r, 3 g, and 3 b. .

  In addition, the projection type liquid crystal device shown in FIG. 2 includes an illumination device configured as shown in FIG. 1, a display element 13 including a reflective liquid crystal element that modulates illumination light from the illumination device according to an image, and a display. It has a projection lens (projection optical system) 15 that projects an image emitted from the element 13 onto a screen, and the display element 13 is arranged at a position where light beams are superimposed by the illumination optical system.

  A prepolarizer 10, a polarization beam splitter (wire grid polarization beam splitter) 11, and a phase compensation plate 12 are disposed between the display element 13 and the field lens 9 located on the exit side of the illumination device. The display element 13 spatially modulates light according to the image signal, and the polarization beam splitter 11 reflects only the light component that has been modulated and changed to a polarization state orthogonal to the incident light. The light reflected by the polarization beam splitter 11 passes through the analyzer 14 (polarizing plate), and unnecessary light components are removed. Then, the light is projected and displayed as an image on the screen by the projection lens 15. The phase compensation plate 12 is disposed immediately before the display element 13 and functions to increase the contrast by compensating for the phase shift.

  The components of the lighting device will be described in more detail.

  As shown in FIG. 3B, a plurality of segment areas corresponding to the lens segments 5a of the multi-lens array 5 shown in FIG. 3C are virtually set on the transparent substrate 3k of the phosphor array 3. In each segment area, phosphors 3r, 3g, and 3b that emit light upon receiving excitation light from the solid light source 1a are arranged. Here, a horizontal direction (also referred to as a row direction) is described as an X direction, and a vertical direction (also referred to as a column direction) is described as a Y direction.

  In this case, segment areas of a plurality of groups are set, and the plurality of (three in the illustrated example) segment areas arranged in the X direction belonging to the first group in the Y direction are irradiated with excitation light. The first phosphors 3r that emit R light (light having the same wavelength) of the three primary colors RGB (red, green, and blue) are received. In addition, a plurality of (three in the illustrated example) segment regions arranged in the X direction belonging to the second and third second groups from the top in the Y direction are irradiated with excitation light, so that among the three primary colors RGB The second phosphor 3g that emits the G light (light having the second same wavelength) is disposed. In addition, a plurality of (three in the illustrated example) segment regions arranged in the X direction belonging to the third group at the bottom in the Y direction are irradiated with excitation light to emit B light (of the three primary colors RGB). A third phosphor 3b that emits light having the same third wavelength is disposed.

  As shown in FIG. 3A, the solid light source 1 a on the light source array 1 is provided corresponding to a plurality of segment areas virtually set on the transparent substrate 3 k of the phosphor array 3. The phosphors 3r, 3g, 3b arranged in each segment region can be irradiated with excitation light (near ultraviolet light), respectively.

  The control unit (not shown) that drives the light source array 1 includes a switching mechanism that switches the phosphors 3r, 3g, and 3b that emit excitation light by controlling the solid-state light source 1a. Here, the switching mechanism first drives three solid-state light sources (lasers) 1a arranged in the X direction (row direction) in the first row from the top in FIG. The three phosphors 3r belonging to the first group lined up in the eyes are excited to emit R light. Next, the drive is switched, and in FIG. 3A, a total of six solid light sources (lasers) 1a arranged in the X direction (row direction) in the second row and the third row from the top are simultaneously driven, The six phosphors 3g belonging to the second group in the second and third rows in b) are excited to emit G light. Next, the driving is switched, and in FIG. 3A, the three solid-state light sources (lasers) 1a arranged in the X direction (row direction) of the fourth row from the top are simultaneously driven, and the fourth row of FIG. The three phosphors 3b belonging to the third group lined up are excited to emit B light.

Therefore, the RGB phosphors 3r, 3g, and 3b emit light sequentially, and each color light is irradiated onto the display element 13 in time series, so that it is emitted from the single-plate display element 13 that operates in time series synchronously. RGB images are superimposed and projected on the screen as a full-color image. By simultaneously illuminating the row direction, light from the plurality of phosphors 3r, 3g, and 3b is irradiated onto the display element 13, so that a bright and uneven display image can be projected.

  According to this illumination device, since the phosphors 3r, 3g, and 3b that irradiate the excitation light are switched, deterioration of the phosphors 3r, 3g, and 3b due to the excitation light irradiation can be suppressed. Can be prevented, and the lifetime of the phosphors 3r, 3g, 3b can be extended.

  Further, since the solid-state light source 1a is arranged corresponding to each segment area where the phosphors 3r, 3g, 3b are arranged, a complicated mechanism such as rotating the color wheel with a motor as in the conventional example is required. In addition, the configuration can be simplified, the cost can be reduced, and the noise can be maintained because the motor is unnecessary. In addition, since it is not necessary to keep the same solid light source 1a in a constantly lit state, the life of the solid light source 1a can be extended.

  Moreover, since the light of each solid light source 1a is condensed by the collimator lens 2 and irradiated to each of the phosphors 3r, 3g, 3b, each of the phosphors 3r, 3g, 3b is condensed and irradiated. Therefore, the usage amount of the phosphors 3r, 3g, and 3b can be reduced, and the cost can be reduced. Further, by using a plurality of solid light sources 1a, the power of each solid light source 1a can be kept small, which is advantageous in terms of reliability and cost.

  In this embodiment, a semiconductor laser is used as the solid light source 1a, but an LED may be used.

[Second Embodiment]
FIGS. 4A to 4C are front views showing configurations of a light source array, a phosphor array, and a multi-lens array used in the illumination device of the second embodiment.

  In this illuminating device, a blue laser emitting B light (near 450 nm) is used as the solid-state light source 1 b of the light source array 21. Therefore, the B light of RGB is not directly phosphor but directly irradiated to the display element 13 as it is. Accordingly, only the phosphors 3r and 3g corresponding to RG are arranged on the transparent substrate 3k of the phosphor array 23, and the diffusion plate P is arranged instead of the phosphor in the segment region corresponding to the B light. It is. By using the diffusing plate P, the angular distribution of the light beam emitted from the diffusing plate P can be matched with the emitting angle distribution from the phosphors 3r and 3g.

In this case, since the phosphors 3r and 3g are excited by the B light, it is possible to display a brighter image with high conversion efficiency. Other configurations and operations are the same as those in the first embodiment.
[Third Embodiment]
FIG. 5 is an explanatory view of the illumination device of the third embodiment, FIG. 5 (a) is a schematic configuration diagram of the main part of the illumination device, and FIG. 5 (b) is a front view of a phosphor array used in the illumination device. It is. Moreover, FIG. 6 is a schematic configuration diagram viewed from above the same illumination device, and FIGS. 7A to 7C respectively show configurations of a light source array, a phosphor array, and a multi-lens array used in the illumination device. It is a front view.

  In this illumination device, spare phosphors 3r, 3g, and 3b are arranged next to each phosphor 3r, 3g, and 3b in the X direction. That is, in the phosphor array (phosphor substrate) 33 of the first embodiment, three phosphors 3r1, 3r2, 3r3 (3g1, 3g2, 3g3, 3b1, 3b2, 3b3) are arranged in each segment region in the X direction. ).

  Then, by moving the phosphor array 33 in the X direction by the shift mechanism 35, the irradiation position of the excitation light by the solid light source 1a on the phosphors 3r, 3g, 3b can be shifted in the X direction. . That is, after a certain period of use has elapsed, the phosphors 3r1, 3r2, and 3r3 positioned at the locations where the solid-state light source 1a is irradiated with the excitation light can be sequentially switched by moving the phosphor array 33 as indicated by the arrow X1. It can be done.

  For example, in the initial state, the phosphors 3r1, 3g1, 3b1 are set to emit excitation light and emit R light, G light, and B light. In this state, if the phosphors 3r1, 3g1, 3b1 are continuously irradiated with the excitation light for a long time, the phosphors 3r1, 3g1, 3b1 are gradually deteriorated to lower the luminance. Therefore, when the luminance is lowered, the phosphor array 33 is shifted as indicated by the arrow X1 by the shift mechanism 35, and the phosphor to which the excitation light hits is switched. By doing so, the fresh phosphors 3r2, 3g2, 3b2 can be excited, so that the brightness returns to the initial state and bright illumination can be performed. After that, it may be switched to the next phosphors 3r3, 3g3, 3b3 as necessary.

  By arranging the spare phosphors on the transparent substrate 3k and shifting in this way, it is possible to provide a bright illumination device over a long period of time. Further, since only the phosphor array 33 is moved, a complicated mechanism such as rotating the color wheel with a motor is not necessary, the configuration can be simplified and the cost can be reduced, and a motor is not necessary. Silence can be maintained. Other configurations and operations are the same as those in the first embodiment.

  In the illustrated example, the case where the spare phosphors are arranged apart from each other is shown, but the spare phosphors may be connected and arranged. In that case, the irradiation position is switched, not the phosphor that irradiates the excitation light.

[Fourth Embodiment]
FIGS. 8A to 8C are front views showing configurations of a light source array, a phosphor array, and a multi-lens array used in the illumination device of the fourth embodiment.

  This illuminating device combines the feature points of the second embodiment and the third embodiment, and uses a blue laser emitting B light (near 450 nm) as the solid-state light source 1b of the light source array 21. In addition, on the transparent substrate 3k of the phosphor array 43, only the phosphors 3r1, 3r2, 3r3, 3g1, 3g2, and 3g3 corresponding to the RG are arranged, including the spare phosphors, and are compatible with the B light. A diffuser plate P is arranged in place of the phosphor in the segment area.

  According to this illuminating device, the effect of 2nd Embodiment and 3rd Embodiment can be acquired.

[Fifth Embodiment]
FIG. 9 is a front view showing the configuration of the phosphor array used in the illumination device of the fifth embodiment and its support mechanism.

  In the illumination device of the fourth embodiment, the phosphor array 33 used in the third embodiment is replaceable, and when luminance degradation occurs after a certain period of time, the phosphor array 33 is pulled out and removed. A new phosphor array 33 can be replaced. Therefore, a frame-shaped holder 38 to which the phosphor array 33 can be attached and detached is provided at the place where the phosphor array 33 is arranged, and the phosphor array 33 is inserted in the X1 direction with respect to the phosphor holder 38 or in the X2 direction. It can be pulled out.

  Therefore, since only the phosphor part having the shortest lifetime can be easily replaced by the service or the user himself / herself, it is possible to realize a low-cost lighting device or display device having a long overall product lifetime.

[Sixth Embodiment]
FIG. 10 is a schematic configuration diagram of an illumination device according to the sixth embodiment, FIG. 11 is a schematic configuration diagram of a projection display device using the illumination device, and FIGS. 12A to 12C are used for the illumination device. It is a front view which shows the structure of a light source array, a fluorescent substance array, and a multi lens array, respectively.

  In the above-described third to fifth embodiments, the case where the spare phosphors are arranged in the X direction is shown. However, in the illumination device of the sixth embodiment, the spare phosphors are arranged in the Y direction in the phosphor array 53. Are arranged side by side. That is, the phosphors 3r1, 3r2, 3r3, 3g1, 3g2, 3g3, 3b1, 3b2, 3b3 are arranged vertically in each segment region. The shift direction of the phosphor array 53 by the shift mechanism 35 is set to the Y direction.

  Also in the illuminating device of this embodiment, the effect similar to the said 3rd Embodiment can be acquired.

In the first to sixth embodiments, assuming that the display element is a single-plate display element, the phosphors corresponding to the three primary colors are sequentially emitted, and the display elements are operated in a surface sequential manner in synchronization with the sequential emission. However, it is not limited to this. For example, the present invention can be applied to a so-called three-plate display device using three display elements for three primary colors. As an operation of the lighting device in this case, for example, a plurality of sets of phosphors corresponding to the three primary colors are set, and light synthesized by switching light emission between these sets is set to white light. Can do.

1, 21 Light source array 1a, 1b Solid light source 3, 23, 33, 43, 53 Phosphor array (phosphor substrate)
3r, 3r1, 3r2, 3r3 First phosphor 3g, 3g1, 3g2, 3g3 Second phosphor 3b, 3b1, 3b2, 3b3 Third B phosphor 4 Collimator lens (illumination optical system)
5 Multi-lens array (illumination optical system)
6 Multi-lens array (illumination optical system)
7 Polarization conversion element (illumination optical system)
8 Field lens (illumination optical system)
9 Field lens (illumination optical system)
13 Display Element 15 Projection Lens (Projection Optical System)
35 Shift mechanism P Diffuser

Claims (9)

A phosphor substrate having a plurality of segment regions, each of which is irradiated with excitation light and emitting phosphors of the same wavelength;
A plurality of solid-state light sources that are provided corresponding to the plurality of segment regions and irradiate excitation light to the phosphors arranged in the segment regions,
An illumination optical system that superimposes illumination areas with light from each of the phosphors;
A switching mechanism for switching the phosphor that emits excitation light by controlling the solid-state light source;
An illumination device comprising: The lighting device according to claim 1,
A plurality of groups of the segment areas are provided;
A plurality of segment regions belonging to the first group are each provided with a first phosphor that emits light of the first same wavelength among the three primary colors by being irradiated with excitation light,
Second phosphors that emit light of the second same wavelength different from the first wavelength of the three primary colors by being irradiated with excitation light are arranged in the plurality of segment regions belonging to the second group, respectively. ,
Third fluorescence that emits light of a third same wavelength different from the first wavelength and the second wavelength of the three primary colors by irradiating the plurality of segment regions belonging to the third group with excitation light. Each body is arranged,
The switching mechanism switches between the first phosphor belonging to the first group, the second phosphor belonging to the second group, and the third phosphor belonging to the third group. . A first phosphor that has a plurality of group segment regions and emits light of the first same wavelength of the three primary colors by irradiating the plurality of segment regions belonging to the first group with excitation light. A second phosphor that emits light of a second same wavelength different from the first wavelength of the three primary colors by being irradiated with excitation light on a plurality of segment regions that are respectively arranged and belong to the second group A phosphor substrate in which a diffusion plate is disposed in place of the phosphor in a plurality of segment regions belonging to the third group,
Provided corresponding to each of the segment regions, emit light of a third wavelength different from the first wavelength and the second wavelength of the three primary colors, and the segment region and the second group of the first group The one corresponding to the segment region of the first irradiating the first phosphor and the second phosphor with the light of the third wavelength as excitation light, and the one corresponding to the segment region of the third group, A plurality of solid state light sources configured to irradiate light of the third wavelength directly through the diffusion plate;
An illumination optical system that superimposes illumination areas by the light from each phosphor and the light transmitted through the diffusion plate;
A switching mechanism for switching the group on the phosphor substrate that controls the solid-state light source to emit excitation light;
An illumination device comprising: A solid state light source that emits excitation light;
A phosphor substrate provided with a phosphor that emits light upon receiving irradiation of excitation light from the solid-state light source;
A shift mechanism that shifts an irradiation position of excitation light by the solid light source with respect to the phosphor by relatively moving the solid light source and the phosphor substrate;
An illumination device comprising: The lighting device according to claim 4,
An illumination device, wherein the phosphor substrate is provided in a replaceable manner. The illumination device according to claim 4 or 5,
The phosphor substrate has a plurality of groups of segment regions;
A plurality of segment regions belonging to the first group are each provided with a first phosphor that emits light of the first same wavelength among the three primary colors by being irradiated with excitation light,
Second phosphors that emit light of the second same wavelength different from the first wavelength of the three primary colors by being irradiated with excitation light are arranged in the plurality of segment regions belonging to the second group, respectively. ,
Third fluorescence that emits light of a third same wavelength different from the first wavelength and the second wavelength of the three primary colors by irradiating the plurality of segment regions belonging to the third group with excitation light. Each body is arranged,
A plurality of the solid light sources are provided corresponding to the plurality of segment regions so as to irradiate the phosphors arranged in the segment regions with excitation light, respectively.
Furthermore, an illumination optical system that superimposes illumination areas with light from the respective phosphors and a switching mechanism that switches between the phosphors that emit excitation light by controlling the solid-state light source are provided. Lighting device. The lighting device according to claim 6,
The switching mechanism switches between the first phosphor belonging to the first group, the second phosphor belonging to the second group, and the third phosphor belonging to the third group. . The illumination device according to claim 4 or 5,
The phosphor substrate has a plurality of groups of segment regions;
A plurality of segment regions belonging to the first group are each provided with a first phosphor that emits light of the first same wavelength among the three primary colors by being irradiated with excitation light,
Second phosphors that emit light of the second same wavelength different from the first wavelength of the three primary colors by being irradiated with excitation light are arranged in the plurality of segment regions belonging to the second group, respectively. ,
A diffusion plate is arranged in place of the phosphor in a plurality of segment regions belonging to the third group,
On the other hand, a plurality of the solid-state light sources are provided corresponding to each of the segment regions as emitting light of a third wavelength different from the first wavelength and the second wavelength of the three primary colors, and The one corresponding to the segment region of the first group and the segment region of the second group irradiates the first phosphor and the second phosphor with the light of the third wavelength as excitation light, The one corresponding to the segment area of the group is configured to transmit the light of the third wavelength directly through the diffusion plate, and further, the light from each phosphor and the light transmitted through the diffusion plate An illumination apparatus comprising: an illumination optical system that superimposes illumination areas by; and a switching mechanism that switches the group on the phosphor substrate that emits excitation light by controlling the solid-state light source.   The illumination device according to any one of claims 1 to 8, a display element that modulates illumination light from the illumination device according to an image, and projection optics that projects an image emitted from the display element onto a screen And a display device.

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