WO2015111145A1 - Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant - Google Patents

Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant Download PDF

Info

Publication number
WO2015111145A1
WO2015111145A1 PCT/JP2014/051181 JP2014051181W WO2015111145A1 WO 2015111145 A1 WO2015111145 A1 WO 2015111145A1 JP 2014051181 W JP2014051181 W JP 2014051181W WO 2015111145 A1 WO2015111145 A1 WO 2015111145A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light source
excitation light
source device
excitation
Prior art date
Application number
PCT/JP2014/051181
Other languages
English (en)
Japanese (ja)
Inventor
康彦 國井
智也 三澤
啓 安達
Original Assignee
日立マクセル株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立マクセル株式会社 filed Critical 日立マクセル株式会社
Priority to PCT/JP2014/051181 priority Critical patent/WO2015111145A1/fr
Priority to JP2015558628A priority patent/JPWO2015111145A1/ja
Publication of WO2015111145A1 publication Critical patent/WO2015111145A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48—Laser speckle optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2073—Polarisers in the lamp house
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources

Definitions

  • the present invention relates to a light source device and a video display device using the same.
  • Patent Document 1 excitation light (blue laser light) emitted from a light source is applied to a disk (phosphor wheel) on which a phosphor is formed, and a plurality of fluorescent lights (red light and green light) are emitted.
  • a configuration for use as illumination light is disclosed.
  • Patent Document 2 a polarizing means is provided between the solid light source and the phosphor film, and the electric field vector of the excitation light from the solid light source determines the incident direction of the excitation light to the phosphor film and the incident surface of the phosphor film.
  • a configuration is disclosed in which excitation light from a solid-state light source is polarized so as to be parallel to a plane formed by the normal line (that is, P-polarized light).
  • Patent Document 2 On the other hand, as described in Patent Document 2, a part of the excitation light incident on the phosphor film is reflected on the surface of the phosphor film, resulting in light loss, but the reflectance is in the polarization state of the excitation light.
  • the S-polarized light has a higher reflectance than the P-polarized light. Therefore, in Patent Document 2, a polarizing means is provided between the solid light source and the phosphor film so that the excitation light becomes P-polarized light.
  • Patent Document 2 is effective when a single light source (light emitting element) is used, but cannot be applied as it is when a plurality of light sources or planar light sources are used. That is, even if a plurality of light sources are arranged in the plane and the polarization means is provided, the excitation light incident on the phosphor film from each light source is condensed and the incident direction becomes radial. The state is a mixture of P-polarized light and S-polarized light, and an intermediate state therebetween, and eventually the meaning of providing polarizing means is lost. Rather, optical loss occurs when the polarizing means is inserted.
  • An object of the present invention is to provide a light source device having a plurality of light sources (or planar light sources) and a phosphor film, and an image display device using the same, to suppress the reflection of excitation light from the phosphor film and to emit fluorescent light. To improve efficiency.
  • the present invention relates to a light source device including an excitation light source that generates excitation light, a condenser lens that collects the excitation light, and a phosphor film that emits fluorescence light by irradiating the condensed excitation light. Is configured to be incident in a radial direction with respect to the condenser lens, and the excitation light condensed by the condenser lens is incident on the phosphor film as P-polarized light.
  • a light source device with less loss of illumination light and less color shift is realized by suppressing the reflection of excitation light from the phosphor film and improving the luminous efficiency of fluorescent light. Further, by using this light source device, a high-performance projection display apparatus is realized.
  • FIG. 1 is a configuration diagram of a light source device in Embodiment 1.
  • FIG. FIG. 4 is a diagram illustrating an example of spectral characteristics of a mirror 4.
  • FIG. FIG. 3 is a schematic diagram showing a structure of a phosphor film 2.
  • FIG. The figure explaining the definition of a polarization state.
  • FIG. 6 is a configuration diagram of a light source device according to a second embodiment.
  • FIG. 6 is a configuration diagram of a light source device in Embodiment 3.
  • FIG. 9 is a configuration diagram of a projection display apparatus according to a fourth embodiment.
  • FIG. 10 is another configuration diagram of a projection display apparatus according to Embodiment 4.
  • FIG. 1 is a configuration diagram of a light source device according to the first embodiment.
  • the light source device 100 includes an excitation light source 5, a mirror 4, a condenser lens 3, and a phosphor wheel 1 as main components.
  • the excitation light source 5 includes a plurality of solid-state light emitting elements such as semiconductor lasers, and emits, for example, blue laser light as excitation light.
  • the plurality of solid-state light emitting elements 50 in the excitation light source 5 are arranged with their light emitting surfaces (PN junction surfaces) substantially radially with respect to the center of the optical axis, and the polarization direction of each excitation light depends on the condenser lens 3. It is comprised so that it may face radially.
  • the arrangement configuration of the solid state light emitting device 50 will be described in detail with reference to FIG.
  • Excitation light 10 (shown by a solid line) emitted from the excitation light source 5 becomes substantially parallel light by the collimator lens 6 and enters the mirror 4.
  • the mirror 4 is composed of two regions in order to reflect the excitation light from the excitation light source 5 and transmit the fluorescence light from the phosphor wheel 1.
  • the first region is a dichroic coat region 41 having a characteristic of reflecting the wavelength region of excitation light (blue) and transmitting the wavelength region of fluorescent light (red, yellow, green).
  • the second region is a wide wavelength transmission region 42 that transmits both the excitation light and fluorescent light wavelength regions.
  • the first region has a smaller area than the second region.
  • Rotating phosphor wheel 1 is formed with phosphor film 2 that is excited by excitation light 10 and emits fluorescent light of a predetermined color.
  • the disk surface is divided into a plurality of regions in the circumferential direction, and red, yellow, and green phosphor films 21 to 23 are formed in each region.
  • a diffuse reflection part 24 that diffuses and reflects the excitation light 10 is provided on the disk surface.
  • the excitation light 10 When the excitation light 10 is received, fluorescent light of three colors of red, yellow and green is generated from each of the phosphor films 21 to 23 of the phosphor wheel 1, and diffused diffuse excitation light is generated from the diffuse reflector 24. In either case, the light is converted into substantially parallel light by the condenser lens 3 and enters the mirror 4.
  • Fluorescent light incident on the mirror 4 is transmitted through any region of the dichroic coat region 41 and the wide wavelength transmission region 42 in the mirror 4.
  • the diffuse excitation light incident on the mirror 4 is reflected by the dichroic coat region 41 but is transmitted by the wide wavelength transmission region 42.
  • all of the fluorescent light and most of the diffusion excitation light become illumination light 11 and are emitted downward in the drawing.
  • both the fluorescent light and the diffuse excitation light generated by the phosphor wheel 1 are emitted from the phosphor wheel 1 to the same side (downward in the drawing), and most of the light passes through the mirror 4 and becomes illumination light.
  • FIG. 2 is a diagram showing two specific examples of the mirror 4.
  • a dichroic coat region 41 hatchched portion
  • the wide wavelength transmission region 42 white portion
  • the dichroic coat region 41 has the property of reflecting the wavelength range of excitation light (blue) and transmitting the wavelength range of fluorescent light (red, yellow, green).
  • the wide wavelength transmission region 42 transmits both the excitation light and the fluorescence light.
  • the number, size, and arrangement of the dichroic coat region 41 are determined in accordance with the number, shape, and position of the incident spot 10a (black) of the excitation light 10 from the excitation light source 5. Therefore, all the excitation light 10 from the excitation light source 5 goes to the phosphor wheel 1.
  • fluorescent light and diffused excitation light that is, illumination light 11
  • illumination light 11 fluorescent light and diffused excitation light
  • spot 11a spot
  • fluorescent light passes through the entire spot 11a and becomes illumination light.
  • the diffusion excitation light cannot be transmitted through a part of the light incident on the dichroic coat region 41 but is lost by the illumination light. However, most of the diffusion excitation light incident on the wide wavelength transmission region 42 is transmitted. And become illumination light.
  • a dichroic coat region 41 (shaded portion) is provided in a rectangular (or square) shape at the center of the incident surface of the mirror 4b, and the other portion is a wide wavelength transmission region 42 (white portion).
  • the incident spot 10a (black) of the excitation light 10 from the excitation light source 5 is small, and all the spots 10a can be stored in one dichroic coat region 41.
  • the area of the dichroic coat region 41 can be made smaller, so that the loss of illumination light by the dichroic coat region 41 becomes smaller.
  • the mirrors 4 a and 4 b of the present embodiment selectively provide the dichroic coat region 41 in the wide wavelength transmission region 42, thereby reflecting the excitation light 10 from the excitation light source 5 to the phosphor wheel 1.
  • the diffused excitation light from the phosphor wheel 1 can be transmitted and used as illumination light.
  • FIG. 3 is a diagram illustrating an example of the spectral characteristics of the mirror 4, where the horizontal axis indicates the wavelength and the vertical axis indicates the transmittance.
  • the blue wavelength region (about 420 to 470 nm) is not transmitted, but the larger wavelength region (red, yellow, green) is transmitted.
  • Such spectral characteristics can be realized by using a dielectric multilayer film (TiO 2 , SiO 2, etc.).
  • FIG. 4 is a diagram showing a specific example of the phosphor wheel 1.
  • the phosphor wheel 1 is divided into, for example, four segments in the circumferential direction, and a red phosphor film 21, a yellow phosphor film 22, and a green phosphor film 23 are applied to each segment as the phosphor film 2.
  • the segment is a diffusive reflector 24 in which a diffusing function is applied to the reflecting mirror.
  • Each of the phosphor films 21, 22, and 23 receives the excitation light 10 and emits red, yellow, and green fluorescent light, respectively.
  • the diffusion function of the diffuse reflection part 24 is that the base material of the phosphor wheel 1 is mirror-reflected by silver vapor deposition or the like, and a highly heat-resistant transmission diffusion plate is pasted thereon, or a diffuser (paste or the like) on the reflective surface It is possible to apply.
  • the diffusing plate diffusing material
  • the surface of the reflection surface itself may be provided with fine irregularities so as to have a function of diffusing simultaneously with reflection.
  • the combination of the excitation light color and the phosphor color, the number of segments, and the shape (angle) of the segments are not limited to the above examples, and may be appropriately changed according to the required illumination light specifications. It ’s fine. For example, generating blue laser light from the excitation light source, removing yellow phosphor from the phosphor wheel to generate red and green fluorescent light, or adding other colors such as cyan and magenta as the phosphor Is also possible.
  • FIG. 5 is a schematic diagram showing the structure of the phosphor film 2.
  • the phosphor film 2 is bonded and fixed to the base material 27 after the phosphor particles 25 are molded into a necessary shape with a resin 26.
  • (A) is a structure in which the phosphor particles 25 are dispersed in the resin 26.
  • the phosphor particles 25 are covered with a resin 26, and the particle diameter of the phosphor particles 25 is several ⁇ m to several tens ⁇ m, and the film thickness of the phosphor film 2 is several hundred ⁇ m.
  • (B) shows a structure in which a resin 26 is laminated on the phosphor particle 25 layer. What is shown here is an example, and a reflective layer may be provided between the phosphor film 2 and the substrate 27, or an antireflection layer may be provided on the surface of the phosphor film 2.
  • the excitation light 10 passes through the resin 26 and then reaches the phosphor particles 25.
  • a part of the excitation light 10 is reflected on the resin 26, a predetermined amount of fluorescent light is not generated, and unnecessary excitation light is mixed into the fluorescent light, which causes a color shift of the illumination light. Therefore, it is necessary for the excitation light 10 to reach the phosphor particles 25 without being reflected by the resin 26.
  • FIG. 6 is a diagram showing a configuration example and polarization direction of an excitation light source in the prior art. Here, the case where four solid light emitting elements 51 to 54 are used will be described.
  • (A) shows the arrangement of the solid light emitting elements 51 to 54 in the excitation light source 5 and the polarization directions 51a to 54a thereof. Since the light emitting surfaces of the solid state light emitting devices 51 to 54 are arranged in one direction, the polarization directions 51a to 54a of the excitation light emitted therefrom are the same direction.
  • FIG. (B) shows the relationship between the condensing direction and the polarization direction of the excitation lights 51L to 54L from the respective solid state light emitting elements in the condensing lens 3.
  • FIG. The excitation light incident on the condenser lens 3 is condensed radially by the condenser lens 3 toward the central direction.
  • the condensing direction of each excitation light is indicated by 51b to 54b.
  • the relationship between the condensing directions 51 b to 54 b and the polarization directions 51 a to 54 a differs depending on the passing part in the condensing lens 3.
  • the condensing direction and the polarization direction are parallel (in the same direction), while for the excitation lights 52L and 54L from the light emitting elements 52 and 54, the light is condensed.
  • the direction and the polarization direction are perpendicular.
  • (C) shows the relationship between the incident direction of the excitation light incident on the phosphor film 2 and the polarization direction.
  • the incident direction (incident surface) of each excitation light to the phosphor film 2 is determined by the condensing direction.
  • the excitation lights 51L and 53L from the light emitting elements 51 and 53 are in the P-polarized state because the polarization direction is parallel to the incident plane, and the excitation directions 52L and 54L from the light emitting elements 52 and 54 are in the polarization plane. Since it is vertical, it becomes S-polarized light.
  • FIG. 7 is a diagram for explaining the definition of the polarization state, where (a) shows the P polarization state and (b) shows the S polarization state. If the vibration direction 12 (polarization direction) of the electric field of the incident light (excitation light 10 in this case) is parallel to the incident surface 13, it is P-polarized light, and if it is perpendicular to the incident surface 13, it is S-polarized light.
  • FIG. 8 is a diagram showing a configuration example and a polarization direction of the excitation light source 5 in the present embodiment. A case where four solid light emitting elements 51 to 54 are used will be described with reference to FIG.
  • (A) shows the arrangement of the solid light emitting elements 51 to 54 in the excitation light source 5 and the polarization directions 51a to 54a thereof. Since the light emitting surfaces of the respective solid state light emitting devices 51 to 54 are arranged radially with respect to the center of the optical axis, the polarization directions 51a to 54a of the excitation light emitted therefrom are radial (radial direction). Such a polarization state in which the polarization direction is radial is also referred to as radial polarization (radial polarization).
  • FIG. (B) shows the relationship between the condensing direction and the polarization direction of the excitation lights 51L to 54L from the respective solid state light emitting elements in the condensing lens 3.
  • FIG. The excitation light incident on the condenser lens 3 is condensed radially by the condenser lens 3 toward the central direction.
  • the condensing direction of each excitation light is indicated by 51b to 54b.
  • the relationship between the condensing directions 51 b to 54 b and the polarization directions 51 a to 54 a is constant regardless of the passing part in the condensing lens 3. That is, for the excitation lights 51L to 54L from all the light emitting elements 51 to 54, the condensing direction and the polarization direction are parallel (same direction).
  • (C) shows the relationship between the incident direction of the excitation light incident on the phosphor film 2 and the polarization direction.
  • the incident direction (incident surface) of each excitation light to the phosphor film 2 is determined by the condensing direction.
  • the excitation lights 51L to 54L from all the light emitting elements 51 to 54 are in the P polarization state because the polarization direction is parallel to the incident surface.
  • FIG. 9 is a diagram showing the reflectance characteristics of a resin material with the polarization state as a parameter, and shows an example of a silicone resin (refractive index 1.41) as an example. Not only does the reflectance increase as the incident angle ⁇ increases, but the S-polarized light has a higher reflectance than the P-polarized light with respect to the polarization state.
  • the phosphor film 2 is generally formed by mixing phosphor particles 25 and a resin 26, and the resin 26 exists on the surface of the phosphor film 2. Therefore, in order for the excitation light incident on the phosphor film 2 to reach the phosphor particles 25, reflection by the resin 26 must be suppressed. If the excitation light is P-polarized light, the reflection by the resin 26 can be suppressed compared to the case of S-polarized light, and the energy of the excitation light can be efficiently transmitted to the phosphor particles 25.
  • FIG. 10 is a diagram showing the relationship between the polarization state and the phosphor emission amount.
  • the amount of light reflected from the phosphor film could be reduced to about 1/3.
  • the amount of light emitted from the phosphor could be increased by 30 to 40% by converting the excitation energy that had been lost due to reflection into the phosphor emission.
  • 11 and 12 are diagrams showing another configuration example of the excitation light source 5.
  • the polarization direction is represented by a one-way arrow, and if the directions of the arrows match, the phases also match.
  • FIGS. 11A and 11B are examples in which the solid light emitting elements 50 are arranged in a circular shape.
  • Each solid state light emitting device 50 is arranged on a circular substrate 59 so that the polarization direction 50 a is radial (radial direction) with respect to the central optical axis of the excitation light source 5.
  • the polarization direction when the excitation light passes through the condenser lens 3 is radial polarization, and any excitation light enters the phosphor film 2 as P-polarization.
  • the solid-state light-emitting element 50 ′ disposed opposite to the solid-state light-emitting element 50 across the central optical axis has a light-emitting surface (so that the phase of the excitation light is inverted by 180 ° and does not cancel out.
  • the PN junction surfaces are arranged in the same direction.
  • FIGS. 11C and 11D are examples in which the solid light emitting elements 50 are arranged in a rectangular shape
  • FIGS. 11E and 11F are examples in which other shapes are arranged in a hexagonal shape or a frame shape.
  • the solid-state light emitting elements 50 are arranged on the substrate 59 so that the polarization directions 50a are radial.
  • the solid light emitting elements arranged opposite to the opposite side of the central optical axis are arranged so that the directions of the light emitting surfaces are the same.
  • FIG. 12A and 12B show an example in which the polarization direction at the center of the excitation light source 5 is changed to a specific direction.
  • FIG. 12A is a front view of the excitation light source 5 viewed from the emission side.
  • FIG. 2 is a view of the excitation light source 5 and the mirror 4 from above.
  • the solid light emitting element 51 in the periphery of the excitation light source 5 has a polarization direction 51a that is radial in the XY plane, but the solid light emitting element 52 in the center (inside the broken line circle) has the polarization direction 52a in the Y direction. Aligned.
  • the polarization direction 52 a (Y direction) is perpendicular to the incident surface (XZ plane, mirror tilt direction) to the mirror 4 and is incident as S-polarized light. I made it.
  • the excitation light from the solid-state light emitting element 52 in the central part is incident on the phosphor film 2 as S-polarized light, but since the incident angle ⁇ is small, the polarization direction (P-polarized light and S-polarized light) as shown in FIG.
  • the difference in reflectance due to is small. Rather, it is advantageous to increase the reflection of the excitation light by making it incident on the mirror 4 with S-polarized light in order to increase the amount of light emitted from the phosphor film 2.
  • the size of the region to be switched to S-polarized light (center portion) is such that the difference in reflectance between P-polarized light and S-polarized light is 5% or less, that is, the incident angle ⁇ to the phosphor film 2 is 40 ° or less. It can be determined from the range.
  • the polarization direction of the solid state light emitting device is deviated from the radial direction. Due to restrictions on the design or manufacture of the light source, the polarization direction 53a of some of the solid state light emitting elements 53 does not coincide with the radial direction and is shifted by an angle ⁇ . Even in that case, the P-polarized component is present in the excitation light, which is effective.
  • the ratio of the P-polarized component and the S-polarized component depends on the deviation angle ⁇ from the radial direction. If the deviation angle ⁇ is 45 ° or less, the P-polarized component exceeds the S-polarized component, so that the effect of this embodiment is obtained. be able to.
  • the polarization direction of the solid state light emitting device is realized by two types of arrangements. From the viewpoint of ease of manufacture of the light source, it is desirable that the directions of the solid state light emitting elements be aligned as much as possible and realized with the minimum combination.
  • the above-described conditions are satisfied while combining two kinds of polarization directions (X direction and Y direction). That is, the polarization direction 51a of the solid state light emitting element 51 maintains the radial direction in the peripheral portion, and the polarization direction 53a of the other solid state light emitting element 53 has a deviation angle ⁇ from the radial direction within 45 °.
  • the polarization direction 52a of 52 is S-polarized light.
  • the configuration examples of the excitation light source shown in FIGS. 11 to 12 are representative examples, and a configuration in which these are combined is also possible.
  • excitation light from a plurality of solid state light emitting elements is less likely to be reflected by the phosphor film, the luminous efficiency of fluorescent light is improved, and a light source device with less loss of illumination light and less color shift is realized. it can.
  • FIG. 13 is a configuration diagram of a light source device according to the second embodiment.
  • the basic configuration of the light source device 100 ′ is the same as that of the first embodiment (FIG. 1), except that a wave plate 7 that is a polarization conversion element is disposed between the excitation light source 5 and the mirror 4.
  • Excitation light linearly polarized light
  • polarized in a single direction is emitted from each solid-state light emitting element 50 of the excitation light source 5 and is converted into a radial polarization state by the wave plate 7.
  • FIG. 14 is a diagram illustrating a specific example of the wave plate 7.
  • the wave plate 7 is divided into four in the circumferential direction, and 1 ⁇ 2 wave plates are arranged in the respective regions while changing the angle of the crystal axis.
  • the half-wave plate has a function of converting linearly polarized light of incident light into linearly polarized light that is line-symmetric with respect to the crystal axis.
  • four divided wave plates 71 to 74 having crystal axis angles ⁇ inclined to 22.5 °, 67.5 °, -22.5 °, and -67.5 ° are arranged around the optical axis. ing.
  • the wave plate is divided into eight in the circumferential direction, and the half wave plate is arranged in each region while changing the angle ⁇ of the crystal axis.
  • incident linearly polarized excitation light is converted into radial polarized light (8 directions) depending on the crystal axis direction of each region.
  • the number of divisions may be determined, for example, according to the number and arrangement of the solid state light emitting elements 50. By increasing the number of divisions, it is possible to approximate smooth radial polarization.
  • polarization conversion element using a TN (Twisted Nematic) liquid crystal such as a theta cell manufactured by AROptix may be used.
  • Example 2 it is possible to realize a light source device in which excitation light from a plurality of solid state light emitting elements is hardly reflected by the phosphor film, and there is little loss of illumination light and no color shift.
  • the degree of freedom in design is high by selecting the wave plate 7. Further, there is a merit that can be applied to a planar light source in which the excitation light source is polarized in the same direction.
  • Example 3 describes a case where the positional relationship between the phosphor wheel 1 and the excitation light source 5 is changed and the two are opposed to each other.
  • FIG. 15 is a configuration diagram of the light source device according to the third embodiment.
  • the basic configuration of the light source device 100 ′′ is the same as that of the first embodiment (FIG. 1) and the second embodiment (FIG. 13), but the mirror is obtained by disposing the excitation light source 5 below the drawing and reversing the transmission / reflection characteristics of the mirror 4. 2 ', and the illumination light is emitted to the left of the drawing, that is, the mirror 4' has the configuration shown in Fig. 2, but the region 41 transmits the wavelength region of the excitation light (blue) and is fluorescent.
  • the region 42 has a dichroic characteristic that reflects the wavelength range of light (red, yellow, green), and the region 42 has a wide wavelength reflection property that reflects both the excitation light and fluorescent light wavelength regions. Then, the vertical axis of the spectral characteristics shown in FIG. 3 is reversed, that is, the vertical axis is replaced from transmittance to reflectance.
  • the excitation light emitted from each solid state light emitting device 50 of the excitation light source 5 is radially polarized as in the first embodiment (FIG. 1).
  • the excitation light 10 passes through the dichroic coat region 41 of the mirror 4 ′, is condensed by the condenser lens 3, and enters the phosphor wheel 1.
  • fluorescent light of three colors of red, yellow, and green is generated from the phosphor film 2 of the phosphor wheel 1, and diffused diffuse excitation light is generated from the diffuse reflection portion.
  • Fluorescent light incident on the mirror 4 ′ is reflected in any region of the dichroic coat region 41 and the wide wavelength reflection region 42 in the mirror 4 ′.
  • the diffuse excitation light incident on the mirror 4 ′ is transmitted through the dichroic coat region 41, but is reflected from the wide wavelength reflection region 42.
  • all of the fluorescent light and most of the diffusion excitation light become illumination light 11 and are emitted to the left of the drawing.
  • the wavelength plate 7 is arranged between the excitation light source 5 and the mirror 4 'as in the second embodiment (FIG. 13).
  • Excitation light linearly polarized light
  • polarized in a single direction is emitted from the solid-state light emitting element 50 of the excitation light source 5 and is converted into radially polarized excitation light 10 by the wave plate 7.
  • the subsequent operation is the same as in FIG.
  • Example 3 too, excitation light from a plurality of solid state light emitting elements is less likely to be reflected by the phosphor film, and a light source device with little loss of illumination light and less color shift can be realized.
  • Example 3 is suitable when the phosphor wheel and the excitation light source are arranged to face each other.
  • the condensing lens 3 that condenses the excitation light on the phosphor film 2 is assumed to be a convex lens, but there may be a case where the condensing lens 3 condenses on a linear region with a cylindrical lens.
  • the polarization direction of the excitation light from each solid-state light emitting element may be the radial direction of the cylindrical lens (perpendicular to the cylinder axis).
  • FIG. 16 is a configuration diagram of a projection display apparatus according to the fourth embodiment.
  • the light source device 100 has the same configuration as that of the first embodiment (FIG. 1), and the description thereof is omitted.
  • the illumination light (fluorescent light and diffuse excitation light) 11 transmitted through the mirror 4 of the light source device 100 is condensed by the condenser lens 63 and enters the dichroic mirror 64.
  • the dichroic mirror 64 transmits green light (hereinafter referred to as G light) and blue light (hereinafter referred to as B light) and reflects red light (hereinafter referred to as R light). Accordingly, the G light and the B light are transmitted through the dichroic mirror 64 and enter the multiple reflection element 65.
  • a red light source 60 is provided to supplement the amount of R light.
  • the R light emitted from the red light source 60 becomes substantially parallel by the collimator lens 61, is collected by the condenser lens 62, is reflected by the dichroic mirror 64, and enters the multiple reflection element 65.
  • the R light, G light, and B light incident on the multiple reflection element 65 are reflected a plurality of times within the multiple reflection element 65 and become light having a uniform illuminance distribution.
  • the R light, G light, and B light emitted from the exit aperture surface of the multiple reflection element 65 are transmitted through the condenser lens 66, reflected by the reflection mirror 67, and then irradiated onto the image display element 68 with a uniform illuminance distribution. .
  • the video display element 68 uses a digital mirror device (DMD, name of Texas Instruments), for example, and irradiates it with R light, G light, and B light in a time-sharing manner.
  • DMD digital mirror device
  • the excitation light source 5 and the red light source 60 have a solid-state light emitting element with a fast response speed and can be time-division controlled. Therefore, each color light is modulated by the video display element 68 in a time division manner for each video signal of each color light.
  • Each color light reflected by the image display element 68 becomes image light, enters the projection lens 69, and is projected on a screen (not shown).
  • the brightness of the specific color is ensured by using the red light source 60 in addition to the light source device 100, but it is of course possible to use only the light source device 100 without using the red light source 60.
  • the dichroic mirror 64 may be deleted, each color light emitted from the phosphor wheel 1 may be used, and the video display element 68 may be operated in synchronization therewith.
  • FIG. 17 is another configuration diagram of the projection display apparatus according to the fourth embodiment.
  • a liquid crystal panel corresponding to three colors (R, G, B) is used as an image display element.
  • the light source device 100 has the same configuration as that of the first embodiment (FIG. 1), and the description thereof is omitted.
  • the illumination light (fluorescence light and diffuse excitation light) 11 transmitted through the mirror 4 of the light source device 100 is uniformly illuminated by the fly-eye lens 80, passes through the lens 81, and proceeds to the color separation optical system.
  • the color separation optical system separates the illumination light emitted from the light source device 100 into R light, G light, and B light, and guides them to the corresponding liquid crystal panels.
  • the B light reflects off the dichroic mirror 82 and enters the B light liquid crystal panel 92 via the reflection mirror 83 and the field lens 89.
  • the G light and the R light are separated by the dichroic mirror 84 after passing through the dichroic mirror 82.
  • the G light is reflected by the dichroic mirror 84, passes through the field lens 90, and enters the G light liquid crystal panel 93.
  • the R light passes through the dichroic mirror 84 and enters the R light liquid crystal panel 94 via the relay lenses 87 and 88, the reflection mirrors 85 and 86, and the field lens 91.
  • Each liquid crystal panel 92, 93, 94 modulates each incident color light according to each video signal to form an optical image of each color light.
  • the optical image of each color light enters the color synthesis prism 95.
  • a dichroic film that reflects B light and a dichroic film that reflects R light are formed in a substantially X shape.
  • the B light and R light incident from the liquid crystal panels 92 and 94 are reflected by the dichroic film for B light and the dichroic film for R light, respectively.
  • the G light incident from the liquid crystal panel 93 passes through each dichroic film.
  • optical images of the respective color lights are combined and emitted as color video light.
  • the combined light emitted from the color combining prism 95 enters the projection lens 96 and is projected on a screen (not shown).
  • FIGS. 16 and 17 it goes without saying that the light source devices 100 ′ and 100 ′′ according to the second embodiment (FIG. 13) and the third embodiment (FIG. 15) may be used instead of the light source device 100.
  • a light source apparatus with little illumination light loss and color shift is used, so that a high-performance projection display apparatus is realized.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Astronomy & Astrophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un dispositif de source lumineuse comportant : une source lumineuse d'excitation (5) (éléments électroluminescents à semi-conducteur (51-54)) pour produire une lumière d'excitation (51L-54L); une lentille de condensation (3) pour condenser la lumière d'excitation (51L-54L) ; et un film de phosphore (2) exposé à la lumière d'excitation condensée (51L-54L) pour produire une fluorescence (lumière d'éclairage). La lumière d'excitation (51L-54L) est polarisée radialement et est rendue incidente sur la lentille de condensation (3). La lumière d'excitation (51L-54L) condensée par la lentille de condensation (3) est rendue incidente sur le film de phosphore (2) en tant que lumière polarisée P. Ainsi, il est possible de mettre en œuvre un dispositif de source lumineuse dans lequel la réflexion de la lumière d'excitation (51L-54L) sur le film de phosphore (2) est supprimée afin d'améliorer le rendement d'émission de la fluorescence, ce qui réduit ainsi la perte et le décalage de couleur de la lumière d'éclairage.
PCT/JP2014/051181 2014-01-22 2014-01-22 Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant WO2015111145A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2014/051181 WO2015111145A1 (fr) 2014-01-22 2014-01-22 Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant
JP2015558628A JPWO2015111145A1 (ja) 2014-01-22 2014-01-22 光源装置およびこれを用いた映像表示装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/051181 WO2015111145A1 (fr) 2014-01-22 2014-01-22 Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant

Publications (1)

Publication Number Publication Date
WO2015111145A1 true WO2015111145A1 (fr) 2015-07-30

Family

ID=53680977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/051181 WO2015111145A1 (fr) 2014-01-22 2014-01-22 Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant

Country Status (2)

Country Link
JP (1) JPWO2015111145A1 (fr)
WO (1) WO2015111145A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017126027A1 (fr) * 2016-01-19 2017-07-27 Ｎｅｃディスプレイソリューションズ株式会社 Roue de corps fluorescent, et unité d'émission de lumière et projecteur l'utilisant
JP2019203955A (ja) * 2018-05-22 2019-11-28 株式会社Ｊｖｃケンウッド プロジェクタ及びマルチプロジェクションシステム
JP2019203954A (ja) * 2018-05-22 2019-11-28 株式会社Ｊｖｃケンウッド プロジェクタ及びマルチプロジェクションシステム
WO2019225052A1 (fr) * 2018-05-22 2019-11-28 株式会社Ｊｖｃケンウッド Projecteur et système multi-projection
WO2020066868A1 (fr) * 2018-09-27 2020-04-02 三菱電機株式会社 Dispositif de source de lumière laser
JP2021033034A (ja) * 2019-08-23 2021-03-01 株式会社Ｊｖｃケンウッド 光源装置
WO2021131946A1 (fr) * 2019-12-25 2021-07-01 ソニーグループ株式会社 Dispositif de source de lumière, phare, dispositif d'affichage et dispositif d'éclairage
CN113534587A (zh) * 2020-04-21 2021-10-22 青岛海信激光显示股份有限公司 激光器和投影设备
JP2021193667A (ja) * 2017-04-25 2021-12-23 マクセル株式会社 固体光源装置
WO2022254831A1 (fr) * 2021-06-04 2022-12-08 ソニーグループ株式会社 Module de source de lumière et projecteur

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0595170A (ja) * 1991-10-02 1993-04-16 Matsushita Electric Ind Co Ltd フエーズロツクレーザアレイおよびその製造方法
JPH05275806A (ja) * 1992-01-29 1993-10-22 Trw Inc 光子バンド構造を備えたミラーを使用するレーザ・アレイ結合
JP2008039882A (ja) * 2006-08-02 2008-02-21 Nano Photon Kk 光学顕微鏡及び観察方法
JP2009116311A (ja) * 2007-10-16 2009-05-28 Sanyo Electric Co Ltd 投写型映像表示装置
JP2009151017A (ja) * 2007-12-19 2009-07-09 Olympus Corp 波長選択性偏光素子および投影型表示装置
JP2012008303A (ja) * 2010-06-24 2012-01-12 Panasonic Corp 光源装置及びそれを用いた投写型表示装置
JP2012009242A (ja) * 2010-06-24 2012-01-12 Seiko Epson Corp 光源装置及びプロジェクター
JP2012108486A (ja) * 2010-10-21 2012-06-07 Panasonic Corp 光源装置および画像表示装置
JP2012123180A (ja) * 2010-12-08 2012-06-28 Seiko Epson Corp 光源装置およびプロジェクター
JP2012185403A (ja) * 2011-03-07 2012-09-27 Seiko Epson Corp 発光素子とその製造方法、光源装置、およびプロジェクター
JP2013054167A (ja) * 2011-09-02 2013-03-21 Seiko Epson Corp 光源装置およびプロジェクター
JP2013065414A (ja) * 2011-09-15 2013-04-11 Ricoh Co Ltd 照明光学系及び投射装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5406638B2 (ja) * 2009-08-31 2014-02-05 カシオ計算機株式会社 光源装置及びプロジェクタ
JP5979416B2 (ja) * 2011-04-20 2016-08-24 パナソニックＩｐマネジメント株式会社 光源装置および画像表示装置
WO2013001866A1 (fr) * 2011-06-30 2013-01-03 日本電気株式会社 Élément optique, appareil de source lumineuse, projecteur et écran

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0595170A (ja) * 1991-10-02 1993-04-16 Matsushita Electric Ind Co Ltd フエーズロツクレーザアレイおよびその製造方法
JPH05275806A (ja) * 1992-01-29 1993-10-22 Trw Inc 光子バンド構造を備えたミラーを使用するレーザ・アレイ結合
JP2008039882A (ja) * 2006-08-02 2008-02-21 Nano Photon Kk 光学顕微鏡及び観察方法
JP2009116311A (ja) * 2007-10-16 2009-05-28 Sanyo Electric Co Ltd 投写型映像表示装置
JP2009151017A (ja) * 2007-12-19 2009-07-09 Olympus Corp 波長選択性偏光素子および投影型表示装置
JP2012008303A (ja) * 2010-06-24 2012-01-12 Panasonic Corp 光源装置及びそれを用いた投写型表示装置
JP2012009242A (ja) * 2010-06-24 2012-01-12 Seiko Epson Corp 光源装置及びプロジェクター
JP2012108486A (ja) * 2010-10-21 2012-06-07 Panasonic Corp 光源装置および画像表示装置
JP2012123180A (ja) * 2010-12-08 2012-06-28 Seiko Epson Corp 光源装置およびプロジェクター
JP2012185403A (ja) * 2011-03-07 2012-09-27 Seiko Epson Corp 発光素子とその製造方法、光源装置、およびプロジェクター
JP2013054167A (ja) * 2011-09-02 2013-03-21 Seiko Epson Corp 光源装置およびプロジェクター
JP2013065414A (ja) * 2011-09-15 2013-04-11 Ricoh Co Ltd 照明光学系及び投射装置

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10409149B2 (en) 2016-01-19 2019-09-10 Nec Display Solutions, Ltd. Phosphor wheel, light-emitting unit, and projector using same
WO2017126027A1 (fr) * 2016-01-19 2017-07-27 Ｎｅｃディスプレイソリューションズ株式会社 Roue de corps fluorescent, et unité d'émission de lumière et projecteur l'utilisant
JP2021193667A (ja) * 2017-04-25 2021-12-23 マクセル株式会社 固体光源装置
JP7228010B2 (ja) 2017-04-25 2023-02-22 マクセル株式会社 固体光源装置
JP2019203954A (ja) * 2018-05-22 2019-11-28 株式会社Ｊｖｃケンウッド プロジェクタ及びマルチプロジェクションシステム
WO2019225052A1 (fr) * 2018-05-22 2019-11-28 株式会社Ｊｖｃケンウッド Projecteur et système multi-projection
US11372321B2 (en) 2018-05-22 2022-06-28 Jvckenwood Corporation Projector and multi-projection system
JP2019203955A (ja) * 2018-05-22 2019-11-28 株式会社Ｊｖｃケンウッド プロジェクタ及びマルチプロジェクションシステム
WO2020066868A1 (fr) * 2018-09-27 2020-04-02 三菱電機株式会社 Dispositif de source de lumière laser
JP2021033034A (ja) * 2019-08-23 2021-03-01 株式会社Ｊｖｃケンウッド 光源装置
JP7234861B2 (ja) 2019-08-23 2023-03-08 株式会社Ｊｖｃケンウッド 光源装置
WO2021131946A1 (fr) * 2019-12-25 2021-07-01 ソニーグループ株式会社 Dispositif de source de lumière, phare, dispositif d'affichage et dispositif d'éclairage
US11920752B2 (en) 2019-12-25 2024-03-05 Sony Group Corporation Light source device, headlight, display apparatus, and illumination apparatus
CN113534587A (zh) * 2020-04-21 2021-10-22 青岛海信激光显示股份有限公司 激光器和投影设备
WO2022254831A1 (fr) * 2021-06-04 2022-12-08 ソニーグループ株式会社 Module de source de lumière et projecteur

Also Published As

Publication number Publication date
JPWO2015111145A1 (ja) 2017-03-23

Similar Documents

Publication Publication Date Title
JP6085025B2 (ja) 光源装置及び投写型映像表示装置
WO2015111145A1 (fr) Dispositif de source lumineuse et dispositif d'affichage d'image l'utilisant
JP5770433B2 (ja) 光源装置及び画像投影装置
JP6056001B2 (ja) 光源装置および投写型表示装置
JP5743240B2 (ja) 蛍光体を備えた照明光学系、プロジェクタ、および照射方法
JP6874743B2 (ja) 光源装置およびプロジェクター
JP2012027052A (ja) 光源装置およびそれを用いた投写型表示装置
US10564531B2 (en) Light source device and projector
JP6039053B2 (ja) 光源装置
JP2018084757A (ja) 照明装置及びプロジェクター
US20200319541A1 (en) Light source device and projection display apparatus
JP2012078537A (ja) 光源装置及び投写型映像表示装置
JP2018194819A (ja) 光源装置および投写型映像表示装置
US11523093B2 (en) Light source apparatus and projector
JP2020177070A (ja) 光源装置及び投写型表示装置
JP2011215531A (ja) プロジェクター
JP7330787B2 (ja) 光源装置およびこれを備える画像投射装置
JP6137238B2 (ja) 光源装置及び画像投影装置
JP5991389B2 (ja) 照明装置及びプロジェクター
JP7106349B2 (ja) 光源装置および画像投射装置
JP7070620B2 (ja) 光源装置およびプロジェクター
JP6353583B2 (ja) 光源装置及び画像投影装置
JP6149991B2 (ja) 光源装置及び画像投影装置
US11366377B2 (en) Wavelength conversion element, illumination device, and projector
JP2024051462A (ja) 光源装置およびプロジェクター

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14880280

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2015558628

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14880280

Country of ref document: EP

Kind code of ref document: A1