JP2019015852A - Luminaire, projector, and method for repairing luminaire - Google Patents

Abstract

To provide a luminaire that can reduce color unevenness, a projector, and a method for repairing a luminaire with which color unevenness can be reduced.SOLUTION: A luminaire 2 comprises: a light source unit 11 including a first light source area S1 that consists of a plurality of light emitting element arrays for image formation 51 arranged in a first direction Z and emits a first bundle of rays for image formation L1, and at least one second light source area S2 that consists of a plurality of light emitting element arrays for excitation 52, 53, 54 arranged in the first direction and emits a second bundle of rays L2; a wavelength conversion element 21 that is provided on a light path of the second bundle of rays; a light branch optical system 15 that reflects the first bundle of rays to cause the first bundle of rays and second bundle of rays to travel in directions different from each other; and a holding part 14 that holds a light guide optical system 50 for merging the rays for excitation emitted from the light emitting element array for excitation 53 from among the plurality of light emitting element arrays for excitation with the first bundle of rays as light for image formation.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an illumination device, a projector, and a repair method for the illumination device.

  2. Description of the Related Art In recent years, as a light source device used for a projector, there is a light source device using a solid light source such as a semiconductor laser and a phosphor that converts excitation light from the solid light source into fluorescence. For example, in the light source device disclosed in Patent Document 1 below, part of light emitted from a plurality of solid light sources is used as excitation light for fluorescence generation, and the remaining light is used for image formation.

JP 2013-117705 A

  By the way, in the light source device described in Patent Document 1, when a solid light source that emits light for image formation out of a plurality of solid light sources fails and is not lit, there is a problem that color unevenness occurs in a display image. Arise.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the illuminating device which can reduce a color nonuniformity at the time of failure of an illuminating device. Another object is to provide a projector including the lighting device. Another object is to provide a method for repairing a lighting device that can improve color unevenness.

  According to the first aspect of the present invention, a first light source region having a plurality of light emitting elements for image formation arranged in a first direction and emitting a first light bundle for image formation; A light source unit including a plurality of excitation light emitting elements arranged in one direction and including at least one second light source region that emits a second light beam; and an optical path of the second light beam A wavelength conversion element provided on the optical fiber, a light branching optical system for causing the first light beam and the second light beam to travel in different directions by reflecting the first light beam, and the plurality A light guide optical system for merging the first excitation light beam emitted from the first excitation light-emitting device among the excitation light-emitting devices into the first light flux as image forming light is held. And a holding unit.

  In the fluorescent light-emitting device according to the first aspect, the first excitation light beam emitted from the first excitation light-emitting device is firstly attached by attaching a light guide optical system supplied separately from the illumination device to the holding unit. Can be merged into the beam bundle. Therefore, even when a failure occurs in the image-forming light-emitting element and a defect occurs in the first light beam, the first light beam defect can be compensated for by the first excitation light beam.

  In the first aspect, further comprising: a beam splitter provided on an optical path of the first light bundle passing through the optical branching optical system; and a first reflecting element provided in a lower stage of the beam splitter. The holding unit is preferably provided so that the first excitation light beam that has passed through the light guide optical system is incident on the beam splitter.

  According to this configuration, the first excitation light beam can be merged with the first light beam by the beam splitter.

  In the first aspect, the optical branching optical system includes a beam splitter provided on an optical path of the first light bundle, and a first reflecting element provided in a lower stage of the beam splitter, The holding unit is preferably provided so that the first excitation light beam that has passed through the light guide optical system is incident on the beam splitter.

  According to this configuration, the first excitation light beam can be merged with the first light beam by the branching optical system.

  In the first aspect, the beam splitter is preferably a half mirror.

  According to this configuration, the first light bundle is branched into two light bundles having the same intensity by the beam splitter. The first excitation light beam is also split into two light bundles having the same intensity by the beam splitter. Thereby, light for image formation with high uniformity of intensity distribution can be obtained.

  In the first aspect, at least one of the light amount of the first light bundle and the light amount of the second light bundle according to the output of the first light intensity detector and the first light intensity detector. It is preferable to further include a light source control device for controlling one of them.

  According to this configuration, it is possible to adjust the intensity balance between the first light bundle and the second light bundle when the lighting device is out of order.

  In the first aspect, a second light intensity detection unit that indirectly detects the light intensity of each of the plurality of image forming light beams emitted from the plurality of image forming light emitting elements and constituting the first light beam bundle. Is preferably further provided.

  According to this configuration, it is easy to detect a failure of the light-emitting element for image formation.

  Further, the second light intensity detection unit has a function of specifying which one of the plurality of image forming light emitting elements has failed, and a function of outputting data indicating the specified result It is desirable to have

  In this way, the user of the illumination device can easily determine whether there is a failure in the image-forming light-emitting element.

  According to the second aspect of the present invention, the illumination device according to the first aspect, a light modulation device that generates illumination light by modulating illumination light from the illumination device according to image information, and the projection of the image light. A projection optical system is provided.

  The projector according to the second aspect can display an image with reduced color unevenness even when the lighting device fails.

  According to the third aspect of the present invention, the first light source region that includes a plurality of light-emitting elements for image formation arranged in a first direction and that emits a first light bundle for image formation; A light source unit that includes at least one second light source region that emits a second light bundle, and is provided on an optical path of the second light bundle. And an optical branching optical system that causes the first light bundle and the second light bundle to travel in different directions by reflecting the first light bundle. A method of repairing an apparatus, the step of identifying an image forming light emitting element in which a failure has occurred among the plurality of image forming light emitting elements, and an image forming in which the failure has occurred among the plurality of excitation light emitting elements. The distance along the first direction with the light emitting device for use is the shortest The step of specifying the excitation light emitting element as the first excitation light emitting element, and the first light beam emitted from the first excitation light emitting element as the image forming light. And a step of disposing a light guide optical system for merging with each other.

  According to the repair method according to the third aspect, the first excitation light beam emitted from the first excitation light emitting element is converted into the first light beam by using the light guide optical system supplied separately from the illumination device. Can be merged into a bundle. Therefore, when a failure occurs in the image-forming light emitting element and a defect occurs in the first light bundle, the first light beam is emitted by the first excitation light without replacing the failed image-forming light emitting element. Can be compensated for.

  In the third aspect, it is preferable that the illumination device further includes a holding unit that holds the light guide optical system, and the light guide optical system is attached to the holding unit in the step of arranging the light guide optical system. .

  According to this configuration, the light guide optical system can be easily arranged.

  In the third aspect, the illumination device indirectly detects the light intensity of each of the plurality of image-forming light beams that are emitted from the plurality of image-forming light-emitting elements and constitute the first light bundle. It is preferable that the image forming light emitting element in which the failure occurs is specified using the detection result of the light intensity detecting unit in the step of further including a detection unit and specifying the image forming light emitting element in which the failure has occurred. .

  According to this configuration, it is easy to identify the image forming light emitting element in which a failure has occurred.

It is a figure which shows schematic structure of the projector which concerns on 1st embodiment. It is a figure which shows schematic structure of an illuminating device. It is a front view which shows the structure of a light source unit. It is a figure which shows the light-incidence surface of the integrator optical system at the time of failure occurrence. It is a figure which shows the structure at the time of attaching a light guide optical system. It is a perspective view which shows schematic structure of a 1st optical component. It is a perspective view which shows schematic structure of a 2nd optical component. It is a figure which shows the light-incidence surface of the integrator optical system after arrangement | positioning of a light guide optical system. It is a flowchart figure which shows the adjustment procedure of white balance. It is a figure which shows schematic structure of the illuminating device of 2nd embodiment. It is an optical path figure at the time of attaching a light guide optical system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In addition, in the drawings used in the following description, in order to make the features easy to understand, there are cases where the portions that become the features are enlarged for the sake of convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent.

(First embodiment)
First, an example of a projector according to the present embodiment will be described.
FIG. 1 is a diagram illustrating a schematic configuration of a projector according to the present embodiment.
As shown in FIG. 1, the projector 1 of this embodiment is a projection type image display device that displays a color video on a screen SCR. The projector 1 includes an illumination device 2, a color separation optical system 3, a light modulation device 4R, a light modulation device 4G, a light modulation device 4B, a combining optical system 5, and a projection optical system 6.

  The color separation optical system 3 separates the white illumination light WL into a red light LR, a green light LG, and a blue light LB. The color separation optical system 3 includes a first dichroic mirror 7a and a second dichroic mirror 7b, a first total reflection mirror 8a, a second total reflection mirror 8b, a third total reflection mirror 8c, and a first A relay lens 9a and a second relay lens 9b are provided.

  The first dichroic mirror 7a separates the illumination light WL from the illumination device 2 into red light LR and other light (green light LG and blue light LB). The first dichroic mirror 7a transmits the separated red light LR and reflects other light. The second dichroic mirror 7b reflects the green light LG and transmits the blue light LB.

  The first total reflection mirror 8a reflects the red light LR toward the light modulation device 4R. The second total reflection mirror 8b and the third total reflection mirror 8c guide the blue light LB to the light modulation device 4B. The green light LG is reflected from the second dichroic mirror 7b toward the light modulation device 4G.

  The first relay lens 9a and the second relay lens 9b are arranged at the subsequent stage of the second dichroic mirror 7b in the optical path of the blue light LB.

  The light modulation device 4R modulates the red light LR in accordance with the image information to form red image light. The light modulation device 4G modulates the green light LG according to image information to form green image light. The light modulation device 4B modulates the blue light LB according to the image information to form blue image light.

  For example, a transmissive liquid crystal panel is used for the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B. A polarizing plate (not shown) is disposed on each of the incident side and the emission side of the liquid crystal panel.

  Further, a field lens 10R, a field lens 10G, and a field lens 10B are disposed on the incident side of the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B, respectively.

  The image light from the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B is incident on the combining optical system 5. The combining optical system 5 combines each image light and emits the combined image light toward the projection optical system 6. For example, a cross dichroic prism is used for the combining optical system 5.

  The projection optical system 6 includes a projection lens group, and enlarges and projects the image light combined by the combining optical system 5 toward the screen SCR. As a result, an enlarged color image is displayed on the screen SCR.

(Lighting device)
Then, the illuminating device 2 which concerns on one Embodiment of this invention is demonstrated. FIG. 2 is a diagram showing a schematic configuration of the illumination device 2.
As shown in FIG. 2, the illumination device 2 includes a light source unit 11, a collimating optical system 12, a dichroic mirror 13, a holding unit 14, a light branching optical system 15, a beam splitter 16, and a first reflecting mirror. 17, second reflection mirror 18, diffusing element 19, pickup optical system 20, wavelength conversion element 21, integrator optical system 22, polarization conversion element 23, superimposing lens 24, and light amount monitoring mirror 26. A first light sensor unit 27, a light source control device 28, and a second light sensor unit 29.

The light source unit 11, the collimating optical system 12, the dichroic mirror 13, the pickup optical system 20, and the wavelength conversion element 21 are provided in this order on the optical axis AX1.
In the present embodiment, the optical axis AX1 coincides with the central axis of the light bundle that enters the wavelength conversion element 21 as excitation light out of the light emitted from the light source unit 11. The second reflecting mirror 18, the diffusing element 19, the dichroic mirror 13, the integrator optical system 22, the polarization conversion element 23, and the superimposing lens 24 are provided in this order on the illumination optical axis AX2 orthogonal to the optical axis AX1.

  Hereinafter, when describing each structure of the illuminating device 2, an XYZ coordinate system may be used in drawing. The X direction is a direction parallel to the illumination optical axis AX2, the Y direction is a direction parallel to the optical axis AX1, and the Z direction is a vertical direction orthogonal to the X direction and the Y direction, respectively.

FIG. 3 is a front view showing the configuration of the light source unit 11.
As shown in FIG. 3, the light source unit 11 includes a light source array 30 including a plurality of light emitting elements 31 arranged in an array, and a light source substrate 35 that supports the light source array 30. In the present embodiment, the light source array 30 has a configuration in which four light emitting element arrays in which five light emitting elements 31 are arranged at predetermined intervals in the Z direction (first direction) are arranged in the X direction. doing.

In the following description, each of the four light emitting element rows in order toward the + X side in FIG. 3 is referred to as a first light emitting element row 51, a second light emitting element row 52, a third light emitting element row 53, and a fourth light emitting element row. This is referred to as a light emitting element array 54. The light emitting elements 31 belonging to the first light emitting element array 51 are referred to as first light emitting elements 31a, the light emitting elements 31 belonging to the second light emitting element array 52 are referred to as second light emitting elements 31b, and the third light emitting element array. The light emitting element 31 belonging to 53 is referred to as a third light emitting element 31c, and the light emitting element 31 belonging to the fourth light emitting element row 54 is referred to as a fourth light emitting element 31d. When the light emitting elements 31 arranged along the Z direction in FIG. 3 are counted toward the −Z side, the first light emitting element 31, the second light emitting element 31, the third light emitting element 31, the fourth line The light emitting element 31 of the eye is referred to as the light emitting element 31 of the fifth row.
In addition, when it is not necessary to distinguish the 1st-4th light emitting element 31a, 31b, 31c, 31d, it may only be called the light emitting element 31. FIG.

  In the present embodiment, the light source unit 11 includes a first light source region S1 and a plurality (three) of second light source regions S2.

The first light source region S1 is composed of a first light emitting element array 51 (a plurality of first light emitting elements 31a).
The three second light source regions S2 include a second light emitting element array 52 (a plurality of second light emitting elements 31b), a third light emitting element array 53 (a plurality of third light emitting elements 31c), and a fourth light emitting element. Each of the columns 54 is composed of a plurality of fourth light emitting elements 31d.

  As shown in FIG. 2, the first light source region S1 emits a first light beam L1. The first light beam L1 is composed of a plurality of light beams emitted from the plurality of first light emitting elements 31a.

  Each second light source region S2 emits a second light beam L2. Each second light bundle L2 is composed of a plurality of light beams emitted from the plurality of second light emitting elements 31b, the plurality of third light emitting elements 31c, or the plurality of fourth light emitting elements 31d.

  The first light beam L1 functions as blue light LB for generating blue image light in the light modulation device 4B in the illumination light WL. The second light beam L2 functions as excitation light for exciting the phosphor layer 40 of the wavelength conversion element 21 described later. In the present embodiment, the second light bundles L2 emitted from the second to fourth light emitting element arrays 52 to 54 are collectively referred to as excitation light L3.

  In the present embodiment, the plurality of first light emitting elements 31 a arranged in the Z direction corresponds to “a plurality of image forming light emitting elements arranged in the first direction” recited in the claims. Further, the plurality of second light emitting elements 31b, the third light emitting element 31c, or the fourth light emitting element 31d arranged in the Z direction is the "a plurality of excitation light emitting elements arranged in the first direction" described in the claims. Is equivalent to.

  The light emitting element 31 is composed of a semiconductor laser that emits blue light in a specific linear polarization state. The plurality of light emitting elements 31 have the same emission intensity peak wavelength (for example, 446 nm).

  The light source substrate 35 is made of a metal having high thermal conductivity such as copper.

  In the present embodiment, the light source unit 11 emits the first light bundle L1 and the plurality of second light bundles L2 in the same direction (+ Y direction).

  As shown in FIG. 2, the collimating optical system 12 includes a plurality of collimating lenses 12a. The plurality of collimating lenses 12a are constituted by convex lenses. Each collimator lens 12a is arranged in an array so as to correspond to each light emitting element 31 constituting the light source array 30 on a one-to-one basis, and converts light emitted from the corresponding light emitting element 31 into parallel light. That is, the same number of collimating lenses 12 a as the light emitting elements 31 are provided.

  The dichroic mirror 13 is provided in the optical path of the excitation light L3 from the light source unit 11 to the wavelength conversion element 21. The dichroic mirror 13 is disposed so as to intersect with each of the optical axis AX1 and the illumination optical axis AX2 at an angle of 45 °. The dichroic mirror 13 has a characteristic of transmitting light in the blue wavelength region and reflecting light in the yellow wavelength region including red light and green light.

  The pickup optical system 20 causes the excitation light L3 transmitted through the dichroic mirror 13 to enter the phosphor layer 40 of the wavelength conversion element 21 in a substantially condensed state and makes the fluorescence YL emitted from the phosphor layer 40 substantially parallel. To do. The pickup optical system 20 includes a first lens 20a and a second lens 20b. The 1st lens 20a and the 2nd lens 20b are comprised from the convex lens.

  The wavelength conversion element 21 converts the excitation light L3 into fluorescence YL composed of yellow light including red light and green light. The wavelength conversion element 21 includes a phosphor layer 40, a substrate 41 that supports the phosphor layer 40, and a fixing member 42 that fixes the phosphor layer 40 to the substrate 41. In the wavelength conversion element 21, the phosphor layer 40 is fixed on the side surface of the phosphor layer 40 in a state where the surface of the phosphor layer 40 opposite to the side on which the excitation light L3 is incident is in contact with the substrate 41. The member 42 is supported on the substrate 41.

The phosphor layer 40 includes, for example, a phosphor that is excited by absorbing excitation light having a wavelength of 446 nm. The phosphor excited by the excitation light generates fluorescence (yellow light) YL having a peak wavelength in a wavelength range of 500 to 700 nm, for example. The phosphor layer 40 includes a base material made of an inorganic material and an activator that becomes a light emission center dispersed in the base material. The phosphor layer 40 is made of, for example, a YAG-based phosphor made of (Y, Gd) ₃ (Al, Ga) ₅ O ₁₂ (YAG: Ce) using Ce as an activator.

  On the side surface and the bottom surface of the phosphor layer 40, a reflective layer (not shown) made of a metal having a high reflectance such as silver or aluminum is provided. Excitation light and fluorescence inside the phosphor layer 40 are reflected by the reflection layer. Further, the upper surface of the phosphor layer 40 is subjected to polishing treatment and antireflection coating. With this configuration, reflection when the excitation light L3 enters the phosphor layer 40 is suppressed, and fluorescence YL is emitted from the surface on which the excitation light L3 is incident. That is, the reflective wavelength conversion element 21 is provided by the configuration of the present embodiment.

  The fluorescence YL generated in the phosphor layer 40 is collimated by the pickup optical system 20 and enters the dichroic mirror 13. The dichroic mirror 13 reflects the fluorescence YL toward the integrator optical system 22.

  The light branching optical system 15 is provided on the optical path of the first light beam L1. The light branching optical system 15 is composed of a strip-shaped mirror, and is arranged so that the longitudinal direction is in the Z direction. The light branching optical system 15 causes the first light beam L1 and the second light beam L2 to travel in different directions by reflecting the first light beam L1 in the −X direction. Hereinafter, the first light beam L1 branched by the light branching optical system 15 may be referred to as blue light LB1.

  A beam splitter 16 is provided on the optical path of the blue light LB1 reflected by the light branching optical system 15. The beam splitter 16 has a strip shape and is arranged so that the longitudinal direction is in the Z direction. In the present embodiment, the beam splitter 16 is a half mirror. The beam splitter 16 reflects the blue light LB1a, which is a half of the blue light LB1, in the + Y direction, and transmits the blue light LB1b, which is the other half of the blue light LB1.

  The blue light LB1a reflected by the beam splitter 16 enters the second reflecting mirror 18. On the other hand, the blue light LB <b> 1 b that has passed through the beam splitter 16 is incident on a first reflecting mirror 17 provided at the lower stage of the beam splitter 16. The first reflection mirror 17 has a strip shape and is arranged so that the longitudinal direction is in the Z direction. The first reflection mirror 17 reflects the blue light LB1 toward the second reflection mirror 18. In the present embodiment, the first reflecting mirror 17 corresponds to a “first reflecting element” recited in the claims.

  The first reflecting mirror 17 reflects many components of the incident blue light LB1b, but transmits a slight component. The component of the blue light LB1b that has passed through the first reflecting mirror 17 is referred to as blue light LB0. The blue light LB0 is incident on the second photosensor unit 29 arranged at the rear stage of the first reflection mirror 17. The configuration of the second photosensor unit 29 will be described later.

  The second reflection mirror 18 reflects the blue light LB1a reflected by the beam splitter 16 and the blue light LB1b reflected by the first reflection mirror 17 in the same direction (+ X direction). The blue light LB1a and the blue light LB1b reflected by the second reflecting mirror 18 are collectively referred to as blue light LB2.

  The beam splitter 16 branches the blue light LB1 into blue light LB1a and blue light LB1b having the same intensity.

  Here, the blue light LB1 is composed of five light beams corresponding to the first light emitting element 31a. Therefore, the blue light LB1a and the blue light LB1b branched from the blue light LB1 are each composed of five light beams corresponding to the first light emitting element 31a, like the blue light LB1. Therefore, the blue light LB2 is composed of a total of 10 rays arranged in 5 rows and 2 columns. As described above, the light flux width in the Y direction of the blue light LB2 is larger than the light flux width in the Y direction of the blue light LB1 when entering the beam splitter 16.

  The diffusion element 19 converts the blue light LB2 into diffused light. Thereby, generation | occurrence | production of the speckle which reduces display quality is suppressed. As the diffusing element 19, for example, a polished glass plate made of optical glass is used. The blue light LB2 diffused by the diffusing element 19 enters the dichroic mirror 13.

  The dichroic mirror 13 transmits the blue light LB2 and reflects the fluorescence YL from the pickup optical system 20, thereby combining the blue light LB2 and the fluorescence YL to generate the illumination light WL. The illumination light WL is incident on the integrator optical system 22.

  The integrator optical system 22 includes a first lens array 22a and a second lens array 22b. The first lens array 22a includes a plurality of lenses 22am for dividing the illumination light WL (fluorescence YL and blue light LB2) emitted from the dichroic mirror 13 into a plurality of partial beam bundles.

  The second lens array 22b includes a plurality of lenses 22bm corresponding to the plurality of lenses 22am of the first lens array 22a. The second lens array 22b, together with the superimposing lens 24, causes the images of the lenses 22am of the first lens array 22a to be in the vicinity of the image forming regions of the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B. Make an image.

  Since the light beam width in the Y direction is enlarged, the blue light LB2 is incident on a wide range of the first lens array 22a. Thereby, the uniformity of the illumination distribution of the blue light LB2 in the illuminated region can be improved.

  The polarization conversion element 23 converts each partial beam bundle divided by the first lens array 22a into a linearly polarized beam bundle. Although not shown, the polarization conversion element 23 includes a polarization separation layer, a reflection layer, and a retardation layer.

  The superimposing lens 24 condenses the partial light beams from the polarization conversion element 23 and superimposes them on each other in the vicinity of the image forming regions of the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B.

  On the optical path between the integrator optical system 22 and the polarization conversion element 23, a light amount monitoring mirror 26 is provided. The light quantity monitor mirror 26 is arranged so as to form an angle of 45 ° with respect to the illumination optical axis AX2. The light quantity monitoring mirror 26 transmits a part of the incident illumination light WL and reflects the rest. The light transmitted through the light amount monitor mirror 26 enters the polarization conversion element 23, and the light reflected by the light amount monitor mirror 26 enters the first photosensor unit 27.

  The light amount monitor mirror 26 may be disposed on the optical path between the polarization conversion element 23 and the superimposing lens 24. In the present embodiment, the first light sensor unit 27 corresponds to a “first light intensity detector” recited in the claims.

  The first optical sensor unit 27 includes a dichroic mirror 61, a second sensor 62, and a third sensor 63. The light extracted by the light quantity monitor mirror 26 enters the first light sensor unit 27 and is separated into blue light LB3 and yellow light YL2 by the dichroic mirror 61. The second sensor 62 measures the amount of blue light LB3. The third sensor 63 measures the amount of yellow light YL2.

  Outputs from the first optical sensor unit 27 (the amount of blue light LB3 and the amount of yellow light YL2) are output to the light source controller 28. The light source control device 28 individually adjusts the current supplied to each light emitting element 31 of the first to fourth light emitting element rows 51 to 54 on the basis of the output from the first light sensor unit 27, and generates the illumination light WL. The intensity of each of the blue light LB2 and the fluorescence YL that constitutes is controlled. Thereby, the white balance of the projector 1 can be adjusted as will be described later.

  By the way, for example, one of the plurality of first light emitting elements 31a that emit the first light bundle L1 may fail due to deterioration over time. If any one of the plurality of first light emitting elements 31a fails, a part of the first light beam L1 used as image forming light is lost.

  Here, among the plurality of first light emitting elements 31a constituting the first light source region S1, for example, the first belonging to the first row of the first light emitting element column 51 (the most + Z side row in FIG. 3). A case where the light emitting element 31a ′ fails will be described.

  On the light incident surface of the first lens array 22a, spots formed by a plurality of light beams constituting the blue light LB2 are formed.

  FIG. 4 is a diagram showing a light incident surface of the integrator optical system 22 when the first light emitting element 31a 'in the first row fails. FIG. 4 is a plan view of the light incident surface of the first lens array 22a viewed in plan from the surface normal direction.

  When the first light emitting element 31a ′ fails, as shown in FIG. 4, two spots due to the light emitted from the first light emitting element 31a ′ are missing on the light incident surface of the first lens array 22a. doing.

  On the light incident surface of the first lens array 22a, the blue light LB2 from the other first light emitting elements 31a (the first light emitting elements 31a in the second to fifth rows) excluding the first light emitting element 31a ′ is emitted. Only 8 spots SP are formed. Accordingly, the blue light LB2 does not enter the lens 22am 'positioned at the uppermost stage on the + Z side of the first lens array 22a.

  As a result, the performance of superimposing the blue light LB2 on the image forming area of the light modulation device 4B by the integrator optical system 22 is lowered, and color unevenness occurs in the image displayed on the screen SCR.

  On the other hand, in the illumination device 2 of the present embodiment, when any one of the plurality of first light emitting elements 31a fails, the light guide optical to be described later on the holding unit 14 without replacing the failed first light emitting element 31a. By attaching the system 50 (see FIGS. 5, 6A, and 6B), it is possible to compensate for the loss of the first light beam L1. The light guide optical system 50 includes a first optical component 50A and a second optical component 50B.

  That is, since the light guide optical system 50 is used when one of the plurality of first light emitting elements 31a fails, the light guide optical system 50 is not used when the illumination device 2 is in a normal driving state.

  The light guide optical system 50 joins the first light beam L1 as a part of the light beam of the second light beam L2 emitted from the second light source region S2 to the first light beam L1 as image forming light. The defect of the light beam L1 of 1 is compensated.

  The illuminating device 2 of this embodiment has the 2nd optical sensor unit 29 for detecting the failure state of the some 1st light emitting element 31a. In the present embodiment, the second light sensor unit 29 corresponds to a “second light intensity detection unit” recited in the claims.

The second light sensor unit 29 includes a blue light detection sensor 29a and a control unit 29b.
The blue light detection sensor 29a indirectly detects the light intensity of the first light beam L1. In the present embodiment, the blue light detection sensor 29a is provided at the subsequent stage of the first reflection mirror 17, detects the light amount of the blue light LB0 that is a slight component transmitted through the first reflection mirror 17, and detects the light amount. The result is transmitted to the control unit 29b. That is, the blue light detection sensor 29a indirectly detects the light intensity of the first light bundle L1 using the component leaked from the first reflection mirror 17 (transmitted blue light LB0).

  The blue light LB0 includes light components emitted from the five first light emitting elements 31a during normal operation. The intensity of each light component can be detected by moving the blue light detection sensor 29a in the Z direction. In addition, you may arrange | position the blue light detection sensor 29a separately with respect to each light component. That is, five blue light detection sensors 29a may be arranged. The position where the blue light detection sensor 29a is disposed is not limited to the subsequent stage of the first reflecting mirror 17, and may be disposed at a position where the stray light component of the first light bundle L1 can be detected, for example.

  The control unit 29b has a function of specifying the first light emitting element 31a in which a failure has occurred among the plurality of first light emitting elements 31a and outputting data indicating the result.

  For example, the control unit 29b outputs data to these controller units so as to display a specified result on a display unit (display panel or the like), an indicator, or a tester (not shown) provided in the projector 1. Thereby, the user of the projector 1 is notified of the presence or absence of a failure state in the first light emitting element 31a. Therefore, the user of the projector 1 can appropriately grasp the timing for using the light guide optical system 50.

  The illuminating device 2 of this embodiment has the holding | maintenance part 14 which hold | maintains the light guide optical system 50 so that attachment or detachment is possible. The holding unit 14 is provided in a main body (not shown) of the lighting device 2. The main body of the illumination device 2 guides the function as a holding member that holds each component (each member such as the light source unit 11 and the collimating optical system 12 described above) and the illumination light WL emitted to the outside. It is a member having a function as a light guide.

As shown in FIG. 2, the holding part 14 includes a first holding part 14a and a second holding part 14b.
The first holding unit 14a is configured such that the second light beam L2 emitted from the third light emitting element array 53 is incident on the first optical component 50A of the light guide optical system 50 held by the first holding unit 14a. In the position. The second holding unit 14 b is provided on the −X side of the first holding unit 14 a and the −Y side of the beam splitter 16. The second holding member 14b is provided on the upstream side of the beam splitter 16 in the optical path of the light passing through the first optical component 50A. Specifically, the second holding unit 14 b is provided at a position where the second optical component 50 B held by the second holding unit 14 b faces the beam splitter 16. In other words, the holding unit 14 is provided in the main body of the illumination device 2 so that light that has passed through the light guide optical system 50 enters the beam splitter 16.

FIG. 5 is a diagram showing a configuration when the light guide optical system 50 is attached to the holding unit 14.
As shown in FIG. 5, the light guide optical system 50 includes a first optical component 50A and a second optical component 50B. The first optical component 50A is attached to the first holding portion 14a, and the second optical component 50B is attached to the second holding portion 14b.

  The first holding unit 14a holds the first optical component 50A so as to reflect the light beam emitted from one of the plurality of third light emitting elements 31c in the -X direction. The first holding portion 14a is made of, for example, a pair of pillars and has a pair of grooves 14a1 for holding the first optical component 50A. By inserting the first optical component 50A into the pair of grooves 14a1, the first optical component 50A can be easily and accurately attached to the first holding portion 14a. Note that the attachment structure of the first optical component 50A in the first holding portion 14a is not limited to the form using the groove 14a1, and for example, an attachment structure by screwing may be adopted.

  The second holding unit 14b holds the second optical component 50B so that the light from the first optical component 50A is reflected in the + Y direction and enters the beam splitter 16. The second holding part 14b has three positioning pins 14b1. The second holding part 14b attaches the second optical component 50B to the second holding part 14b by fixing the second optical part 50B in contact with the three positioning pins 14b1 with a screw member (not shown). Can be performed easily and accurately.

  6A is a perspective view illustrating a schematic configuration of the first optical component 50A, and FIG. 6B is a perspective view illustrating a schematic configuration of the second optical component 50B.

  As shown in FIG. 6A, the first optical component 50A includes a plate-like frame member 70 and a mirror 71 provided on the frame member 70. The frame member 70 has a plurality of first openings 70a. The same number (five) of first openings 70a as the third light emitting elements 31c are provided. Each first opening 70a is provided so as to correspond to each optical path of light emitted from each third light emitting element 31c when the first optical component 50A is held by the first holding portion 14a.

  The mirror 71 is detachably attached to the first opening 70a. In FIG. 6A, the mirror 71 is attached to the first opening 70a located at the top of the five first openings 70a. In the first optical component 50A shown in FIG. 6A, the mirror 71 is provided in the first opening 70a corresponding to the light beam emitted from the third light emitting element 31c ′ located in the first row of the third light emitting element row 53. It is attached. The third light emitting element 31c 'corresponds to a "first excitation light emitting element" recited in the claims, and the light beam L2a corresponds to a "first excitation light beam" recited in the claims. In FIG. 5, a light beam emitted from the third light emitting element 31c 'is illustrated as a light beam L2a.

  Of the light beams emitted from the third light emitting elements 31c, the light beams incident on the mirror 71 are reflected toward the second optical component 50B, and the other light beams are transmitted through the first opening 70a and incident on the dichroic mirror 13. .

  Based on such a configuration, by attaching the mirror 71 to the desired first opening 70a, the first optical component 50A causes the second light to be emitted from the plurality of third light emitting elements 31c to the second. It is possible to branch off from the light beam L2 and reflect it toward the second optical component 50B.

  The first optical component 50A is not limited to the form shown in FIG. 6A. For example, the frame member 70 may be formed of a translucent member such as glass. By configuring the frame member 70 with a light transmissive member, the first opening 70a for transmitting the light beam from the third light emitting element 31c becomes unnecessary. What is necessary is just to arrange | position the mirror 71 in the position into which the light ray from the 3rd light emitting element 31c injects.

  Also, a first optical component 50A having a mirror 71 attached to any one of the five first openings 70a is prepared, and the first optical component 50A corresponding to the position of the failed first light emitting element 31a is used. May be.

  As shown in FIG. 6B, the second optical component 50 </ b> B includes a frame portion 72 and a mirror 73 provided on the frame portion 72. The frame portion 72 includes a mirror holding portion 74 that holds the mirror 73 and a base portion 75 that holds the mirror holding portion 74. The mirror holding part 74 has a plurality of second openings 74a. The same number of second openings 74a as the first openings 70a of the first optical component 50A are provided. Each second opening 74a is provided so as to correspond to each first opening 70a of the first optical component 50A when the second optical component 50B is held by the second holding portion 14b.

  The mirror 73 is detachably provided to the second opening 74a. In FIG. 6B, the mirror 73 is attached to the second opening 74a located at the top of the five second openings 74a. That is, in the first optical component 50A, the mirror 73 is attached to the second opening 74a at a position corresponding to the first opening 70a to which the mirror 71 is attached.

  The second optical component 50B is not limited to the form shown in FIG. 6B. Since the second optical component 50B only needs to be able to reflect all incident light to the beam splitter 16 side, all light rays reflected by the mirror 71 provided in any of the first openings 70a of the first optical component 50A. May be constituted by a single reflecting mirror having a size capable of reflecting the light.

  As shown in FIG. 5, the light beam L2a branched from the second light beam L2 by the first optical component 50A (mirror 71) is reflected by the second optical component 50B (mirror 73) and enters the beam splitter 16. To do. The light beam L2a merges with the blue light beam LB1 (first light beam L1) incident on the beam splitter 16.

  Note that the light beam L2a is split into two beams by reflecting half of the component by the beam splitter 16 and transmitting the remaining half component through the beam splitter 16 in the same manner as the blue light LB1. In the present embodiment, the light beam L2a corresponds to a “first excitation light beam” recited in the claims.

  In this manner, by attaching the light guide optical system 50 to the holding unit 14, a part of the light rays (light rays L2a) emitted from the plurality of third light emitting elements 31c constituting the third light emitting element row 53 are image-formed. It can be made to merge with the 1st light beam L1 as light for use.

  When a failure occurs in any of the plurality of first light emitting elements 31a, the lighting device 2 of the present embodiment can be repaired in the following procedure without replacing the failed first light emitting element 31a. Hereinafter, the repair method of the lighting device 2 will be described.

  First, in the repair method of the illuminating device 2, the 1st light emitting element 31a in which a failure has occurred among the plurality of first light emitting elements 31a is specified (first step).

(First step)
When the color unevenness of the display image is recognized by the user of the projector 1, the blue light detection sensor 29a measures the amount of each component of the blue light LB0 that has passed through the first reflection mirror 17, and the measurement result is displayed on the control unit 29b. Send to. Based on the measurement result from the blue light detection sensor 29a, the controller 29b identifies which first light emitting element 31a out of the plurality of first light emitting elements 31a has failed.

  The control unit 29 b outputs the specific result to a display unit (not shown) provided in the projector 1. For example, the control unit 29b outputs that the first light emitting element 31a 'in the first row constituting the first light emitting element column 51 is out of order. Accordingly, the user of the projector 1 who has visually recognized the display unit recognizes that a failure has occurred in the first light emitting element 31 a ′ in the first light emitting element array 51.

  Subsequently, a replacement light emitting element that emits an excitation light beam to be combined with the first light bundle L1 from the plurality of third light emitting elements 31c constituting the third light emitting element array 53 (first excitation light emission). (Element) is specified (second step).

(Second step)
In the present embodiment, the third light emitting element 31c ′ having the shortest distance along the Z direction from the failed first light emitting element 31a ′ is specified as the replacement light emitting element. Since the light source unit 11 of the present embodiment has a grid-like arrangement, the distance along the Z direction between the first light emitting element 31a ′ and the third light emitting element 31c ′ is zero.

  Subsequently, a light guide optical system 50 for merging the light beam L2a emitted from the third light emitting element 31c 'as the light for image formation into the first light beam L1 is disposed (third process).

(Third step)
The light guide optical system 50 (first optical component 50A and second optical component 50B) that branches the light beam L2a emitted from the third light emitting element 31c ′ from the second light beam L2 is shown in FIGS. 6A and 6B. Use the same thing. A user of the projector 1 attaches the light guide optical system 50 to the holding unit 14. Thereby, the light beam L2a emitted from the third light emitting element 31c ′ is combined with the first light beam L1. The light beam L2a is included in the blue light LB2.

  The light beam L2a that merged with the first light beam L1 is emitted from the third light emitting element 31c ′ arranged in the same row (the same height in the Z direction) as the first light emitting element 31a ′ that has failed in the light source unit 11. .

Therefore, in the beam splitter 16, the position in the Z direction where the light beam L2a from the third light emitting element 31c ′ is incident and the position in the Z direction where the light beam emitted from the failed first light emitting element 31a ′ is incident are approximately. Match.
Thereby, the defect | deletion which had arisen in 1st light beam L1 by failure of 1st light emitting element 31a 'is supplemented with the light ray L2a inject | emitted from 3rd light emitting element 31c'.

  FIG. 7 is a view showing a light incident surface of the integrator optical system 22 after the light guide optical system 50 is arranged. FIG. 7 is a plan view of the light incident surface of the first lens array 22a viewed in plan from the surface normal direction.

  By arranging the light guide optical system 50, as shown in FIG. 7, when the first light emitting element 31a ′ fails, a spot formed by the third light emitting element 31c ′ on the upper stage of the light incident surface of the first lens array 22a. SP ′ can be formed. Thereby, the blue light LB2 can be made incident on the upper lens 22am 'of the first lens array 22a. This prevents a decrease in the superimposition performance of the blue light LB2 on the image forming area of the light modulation device 4B by the integrator optical system 22, and even when a failure occurs in the first light emitting element 31a of the light source unit 11, the display image Color unevenness is unlikely to occur.

  The excitation light L3 incident on the phosphor layer 40 is in a state where the symmetry of the light distribution is disturbed because the light beam L2a of the third light emitting element 31c 'is distributed to the first light beam L1. However, since the excitation light L3 is incident on the phosphor layer 40 while being condensed by the pickup optical system 20, and the fluorescence YL is Lambert-emitted from the phosphor layer 40, it does not cause a significant problem.

  In the present embodiment, a part of the second light bundle L2 emitted from the third light emitting element array 53 between the second light emitting element array 52 and the fourth light emitting element array 54 is guided by the light guide optical system 50. The first light flux L1 is merged. Therefore, the symmetry of the intensity distribution of the excitation light L3 incident on the phosphor layer 40 is maintained at least in the left-right direction (corresponding to the X direction in FIG. 3) even when the light guide optical system 50 is arranged. Therefore, the symmetry of the intensity distribution of the fluorescence YL emitted from the phosphor layer 40 is also maintained at least in the left-right direction.

  When the light guide optical system 50 is attached, the light quantity ratio between the excitation light L3 and the blue light LB2 changes, so the light quantity ratio between the blue light LB2 and the fluorescence YL changes, and the white balance of the display image may be lost. .

  Therefore, in the projector 1 of this embodiment, the white balance can be adjusted by the following procedure shown in FIG.

  Here, the first photosensor unit 27 measures the amount of blue light LB3 and the amount of yellow light YL2 (step S21). The light source control device 28 stores a reference value of the ratio between the light amount of the blue light LB3 and the light amount of the yellow light YL2.

  The light source control device 28 obtains the ratio of the current light amount of the blue light LB3 and the light amount of the yellow light YL2 detected by the first light sensor unit 27, and compares it with a reference value. As a result, when the difference between the current ratio and the reference value exceeds the allowable range, the current supplied to the first to fourth light emitting element arrays 51 to 54 is individually set so that the current ratio approaches the reference value. (Step S22). The light source control device 28 controls at least one of the light amount of the first light beam L1 and the light amount of the second light beam L2 so that the current ratio approaches the reference value.

  In the case of using the light guide optical system 50, for example, by increasing the current supplied to the second light emitting element row 52 and the fourth light emitting element row 54 more than before the failure of the first light emitting element 31a ′. The ratio of the light amount of the blue light LB3 and the light amount of the yellow light YL2 can be brought close to the reference value. Thereby, white balance is improved.

  Of the plurality of third light emitting elements 31c constituting the third light emitting element array 53, a current supplied to the third light emitting element 31c that emits the light transmitted through the light guide optical system 50 is supplied to the first light emitting element 31a ′. The ratio of the light amount of the blue light LB3 and the light amount of the yellow light YL2 may be made closer to the reference value by increasing the amount before the occurrence of the failure.

  As described above, the projector 1 according to the present embodiment can display an image in which white balance is not easily lost.

(Second embodiment)
Then, the illuminating device concerning 2nd embodiment is demonstrated. In the following description, the same reference numerals are assigned to components and members common to the first embodiment, and details thereof are omitted or simplified.

FIG. 9 is a diagram showing a schematic configuration of the illumination device 102 of the present embodiment.
As shown in FIG. 9, the illumination device 102 includes a light source unit 11, a collimating optical system 12, a first dichroic mirror 113, a holding unit 114, a light branching optical system 115, and a second reflecting mirror 18. The diffusion element 19, the second dichroic mirror 80, the pickup optical system 20, the wavelength conversion element 21, the integrator optical system 22, the polarization conversion element 23, the superimposing lens 24, the light quantity monitoring mirror 26, A first light sensor unit 27, a light source control device 28, and a second light sensor unit 29 are provided.

  The light source unit 11, the collimating optical system 12, and the first dichroic mirror 113 are provided in this order on the optical axis AX1. The optical axis AX1 coincides with the central axis of the light beam emitted from the third light emitting element array 53 of the light source unit 11. The wavelength conversion element 21, the pickup optical system 20, the first dichroic mirror 113, the second dichroic mirror 80, the integrator optical system 22, the polarization conversion element 23, and the superimposing lens 24 are provided in this order on the illumination optical axis AX2. Yes.

  Hereinafter, when explaining each structure of the illuminating device 102, it may explain using an XYZ coordinate system in drawing. The X direction corresponds to a direction parallel to the illumination optical axis AX2, the Y direction corresponds to a direction parallel to the optical axis AX1, and the Z direction corresponds to a vertical direction orthogonal to the X direction and the Y direction, respectively.

  The first dichroic mirror 113 is disposed so as to intersect with each of the optical axis AX1 and the illumination optical axis AX2 at an angle of 45 °. The first dichroic mirror 113 has a characteristic of reflecting light in a blue wavelength region and transmitting yellow light including red light and green light.

  In the present embodiment, the second light beam L2 emitted from the light source unit 11 is reflected by the first dichroic mirror 113 and is collected on the phosphor layer 40 of the wavelength conversion element 21 by the pickup optical system 20. . The fluorescence YL generated by the phosphor layer 40 is collimated by the pickup optical system 20 and enters the first dichroic mirror 113. The fluorescence YL passes through the first dichroic mirror 113 and enters the second dichroic mirror 80.

  The second dichroic mirror 80 is disposed so as to intersect with the illumination optical axis AX2 at an angle of 45 °. The second dichroic mirror 80 has a characteristic of reflecting light in the blue wavelength region and transmitting yellow light including red light and green light.

  The light branching optical system 115 of this embodiment includes a beam splitter 16 provided on the optical path of the first light beam L1 and a first reflecting mirror 17 provided at the lower stage of the beam splitter 16.

  Also in the present embodiment, the component (blue light LB0) transmitted through the first reflecting mirror 17 in the blue light LB1 is incident on the second photosensor unit 29 arranged at the rear stage of the first reflecting mirror 17.

  The holding unit 114 is a member that holds the light guide optical system 150 and is provided in a main body (not shown) of the illumination device 102. The light guide optical system 150 of this embodiment has the same configuration as the first optical component 50A shown in FIG. 6A.

  The holding unit 114 of the present embodiment is provided on the + X side of the beam splitter 16. Specifically, the holding unit 114 is provided at a position where the second light beam L2 emitted from the third light emitting element array 53 is incident on the light guide optical system 150 held by the holding unit 114. Yes. The holding unit 114 is provided on the upstream side of the beam splitter 16 in the optical path of light passing through the light guide optical system 150. Specifically, the holding unit 114 is provided at a position where the light guide optical system 150 held by the holding unit 114 faces the beam splitter 16. That is, the holding unit 114 is provided so that light that has passed through the light guide optical system 150 enters the beam splitter 16.

  FIG. 10 is a diagram illustrating an optical path of light emitted from the light source unit 11 when the light guide optical system 150 is attached to the holding unit 114.

  As shown in FIG. 10, the light beam L <b> 2 a branched from the second light beam L <b> 2 by the light guide optical system 150 directly enters the beam splitter 16. As a result, the light beam L2a merges with the blue light beam LB1 (first light beam L1) incident on the beam splitter 16.

  As described above, also in the illumination device 102 of the present embodiment, by using the light guide optical system 150, a part of the light beams emitted from the plurality of third light emitting elements 31c constituting the third light emitting element array 53 can be obtained. The light for image formation can be merged with the first light beam L1. The number of parts of the light guide optical system 150 of the present embodiment is smaller than the number of parts of the light guide optical system 50 of the first embodiment.

  The blue light LB2 that has passed through the optical branching optical system 115 and the second reflecting mirror 18 is diffused by the diffusing element 19, and then enters the second dichroic mirror 80. The second dichroic mirror 80 generates the illumination light WL by reflecting the blue light LB2 and transmitting the fluorescence YL from the first dichroic mirror 113.

  The illumination light WL is superimposed on the image forming regions of the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B via the integrator optical system 22, the polarization conversion element 23, and the superimposing lens 24.

  According to the illuminating device 102 of the present embodiment, as in the first embodiment, even when a failure occurs in the first light emitting element 31a of the light source unit 11, an effect that color unevenness of the display image hardly occurs can be obtained.

  Also in the illumination device 102 of the present embodiment, as in the first embodiment, when the light guide optical system 150 is attached, the white balance of the projector 1 is obtained by using the first light sensor unit 27 and the light source control device 28. Can be adjusted.

In addition, this invention is not limited to the content of the said embodiment, In the range which does not deviate from the main point of invention, it can change suitably.
For example, in the above-described embodiment, the light source unit 11 has the case where the peak wavelengths (for example, 446 nm) of the light emission intensity of the light emitting elements 31 are equal to each other, but the present invention is not limited to this. The plurality of light emitting elements 31 may have different peak wavelengths of light emission intensity. For example, a semiconductor laser having a peak wavelength of, for example, 460 nm is used as the first light emitting element 31a for emitting image forming light, and the second to fourth light emitting elements 31b, 32c, 31d for emitting excitation light are used. For example, a semiconductor laser having a peak wavelength of 446 nm may be used.

  The first step described in the first embodiment may be automatically executed while the projector is operating, or may be automatically executed when the projector is activated.

  In the above-described embodiment, the example in which the holding unit is provided so that the light from the third light-emitting element array is incident on the light guide optical system has been described. You may provide a holding | maintenance part so that the light from a 2nd or 4th light emitting element row | line | column may inject into a light guide optical system. However, from the viewpoint of not losing the symmetry of the intensity distribution of the excitation light as much as possible, light from the third light emitting element array, that is, the central light emitting element array among the plurality of light emitting element arrays that emit the excitation light is guided. It is preferable to provide a holding portion so as to be incident on the optical system.

  You may employ | adopt a sealing structure as a main-body part of the illuminating device 2. FIG. In this case, an opening for attaching the light guide optical system 50 to the holding unit 14 is required in the main body. Therefore, even when the light guide optical system 50 is attached to the holding part 14, it is necessary to have a structure that can ensure the sealed state of the main body part.

  In the above-described embodiment, the projector 1 including the three light modulation devices 4R, 4G, and 4B has been exemplified. A digital mirror device may be used as the light modulation device.

  In the above embodiment, an example in which the lighting device according to the present invention is mounted on a projector has been shown, but the present invention is not limited to this. The lighting device according to the present invention can also be applied to lighting fixtures, automobile headlights, and the like.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2,102 ... Illuminating device, 4B, 4G, 4R ... Light modulation device, 6 ... Projection optical system, 11 ... Light source unit, 14, 114 ... Holding part, 15, 115 ... Light branching optical system, 16 ... Beam splitter, 17 ... first reflecting mirror, 18 ... second reflecting mirror, 21 ... wavelength conversion element, 27 ... first optical sensor unit, 28 ... light source control device, 29 ... second optical sensor unit, 31 ... light emission Element 31a, 31b, 31c, 31d ... 1st light emitting element, 31a '... 1st light emitting element, 31c' ... 3rd light emitting element, 50, 150 ... Light guide optical system, BL1 ... 1st light bundle, BL2a ... Light rays, L1 ... first light bundle, L2 ... second light bundle, S1 ... first light source region, S2 ... second light source region, YL ... fluorescence.

Claims (11)

A first light source region having a plurality of image-forming light emitting elements arranged in a first direction and emitting a first light bundle for image formation;
A light source unit including a plurality of excitation light emitting elements arranged in the first direction and including at least one second light source region that emits a second light bundle;
A wavelength conversion element provided on the optical path of the second light bundle;
A light branching optical system for propagating the first light bundle and the second light bundle in different directions by reflecting the first light bundle;
A light guide optical system configured to merge a first excitation light beam emitted from the first excitation light-emitting device among the plurality of excitation light-emitting devices into the first light bundle as image-forming light; And a holding unit that holds the lighting device. A beam splitter provided on an optical path of the first light bundle passing through the optical branching optical system, and a first reflecting element provided at a lower stage of the beam splitter,
The illumination device according to claim 1, wherein the holding unit is provided so that the first excitation light beam that has passed through the light guide optical system enters the beam splitter. The optical branching optical system includes a beam splitter provided on an optical path of the first light bundle, and a first reflecting element provided at a lower stage of the beam splitter,
The illumination device according to claim 1, wherein the holding unit is provided so that the first excitation light beam that has passed through the light guide optical system enters the beam splitter. The illumination device according to claim 2, wherein the beam splitter is a half mirror. A first light intensity detector;
2. A light source control device that controls at least one of a light amount of the first light bundle and a light amount of the second light bundle according to an output of the first light intensity detection unit. The illuminating device as described in any one of thru | or 4. 2. A second light intensity detector that indirectly detects the light intensity of each of the plurality of image forming light beams emitted from the plurality of image forming light emitting elements and constituting the first light beam bundle. The illuminating device as described in any one of thru | or 5. The second light intensity detection unit has a function of identifying which one of the plurality of image-forming light-emitting elements has failed, a function of outputting data indicating the identified result, The lighting device according to claim 6. The lighting device according to any one of claims 1 to 7,
A light modulation device for generating image light by modulating light from the illumination device according to image information;
A projection optical system that projects the image light. A first light source region that includes a plurality of light-emitting elements for image formation arranged in a first direction, and that emits a first light bundle for image formation;
A light source unit comprising a plurality of excitation light emitting elements arranged in the first direction and including at least one second light source region that emits a second light bundle;
A wavelength conversion element provided on the optical path of the second light bundle;
A method of repairing an illuminating device comprising: a light branching optical system that causes the first light beam and the second light beam to travel in different directions by reflecting the first light beam. ,
Identifying a light emitting element for image formation in which a failure has occurred among the plurality of light emitting elements for image formation;
The step of identifying the excitation light emitting element having the shortest distance along the first direction from the failed image forming light emitting element as the first excitation light emitting element among the plurality of excitation light emitting elements. When,
Disposing a light guide optical system for merging the first excitation light beam emitted from the first excitation light-emitting element into the first light beam as image forming light. Repair method. The illumination device further includes a holding unit that holds the light guide optical system,
The repair method according to claim 9, wherein in the step of arranging the light guide optical system, the light guide optical system is attached to the holding portion. The illumination device further includes a light intensity detection unit that indirectly detects the light intensity of each of the plurality of image forming light beams that are emitted from the plurality of image forming light emitting elements and constitute the first light beam bundle,
The repair according to claim 9 or 10, wherein in the step of identifying the image forming light emitting element in which the failure has occurred, the image forming light emitting element in which the failure has occurred is identified using a detection result of the light intensity detection unit. Method.

Images