WO2018214289A1 - 光源系统及显示设备 - Google Patents

光源系统及显示设备 Download PDF

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Publication number
WO2018214289A1
WO2018214289A1 PCT/CN2017/096514 CN2017096514W WO2018214289A1 WO 2018214289 A1 WO2018214289 A1 WO 2018214289A1 CN 2017096514 W CN2017096514 W CN 2017096514W WO 2018214289 A1 WO2018214289 A1 WO 2018214289A1
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WIPO (PCT)
Prior art keywords
light
region
light source
excitation light
wavelength conversion
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2017/096514
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English (en)
French (fr)
Inventor
郭祖强
杜鹏
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication date
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Priority to US16/614,105 priority Critical patent/US11306899B2/en
Publication of WO2018214289A1 publication Critical patent/WO2018214289A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0457—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/06—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out ultraviolet radiation
    • 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
    • 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
    • G03B21/2046—Positional adjustment of light sources
    • 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
    • G03B21/2066—Reflectors in illumination beam
    • 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
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection

Definitions

  • the invention relates to a light source system and a display device.
  • the first light source is used to excite the light source system that is required to generate the desired light by the laser powder (for example, the blue laser light excites the yellow laser to generate white light or a specific color of light), and has high light efficiency, good stability and low cost.
  • the blue laser light excites the yellow laser to generate white light or a specific color of light
  • FIG. 1 is a schematic structural view of a prior art light source system 100
  • FIG. 2 is a schematic structural view of a region beam splitter 103 of the light source system 100 of FIG.
  • the light source system includes an excitation light source 101, a light homogenizing device 102, a region beam splitter 103, a collection system 104, a wavelength conversion device 105, relay lenses 106 and 108, a mirror 107, and a light machine square rod 109.
  • the excitation light source 101 is generally a blue laser light source that emits blue excitation light. After the blue excitation light is homogenized by the light homogenizing device 102, it passes through the region beam splitter 103, as shown in FIG.
  • the center of the region beam splitter 103 is a blue-transparent yellow-transparent region coating surrounded by a mirror, and the blue excitation light is transmitted from the region coating of the region beam splitter 103 through the collection system 104 ( For example, a collecting lens is concentrated on the wavelength conversion device 105, and the wavelength converting device 105 is excited to generate a laser light (such as a red laser, a green laser, or a yellow laser), and a part of the unconverted blue excitation light is received.
  • a laser light such as a red laser, a green laser, or a yellow laser
  • the laser light is emitted in the form of Lambertian light, and after being collected by the collection system 104, is reflected at the region beam splitter 103, wherein the portion of the blue excitation light is lost due to transmission at the region coating, resulting in the The light source system 100 has a low light utilization rate.
  • the blue excitation light and the laser light reflected by the area beam splitter 103 are sequentially imaged through the relay lens 106, the mirror 107, and the relay lens 108 to the entrance of the optical machine bar 109, and finally The optomechanical rod 109 exits the exit.
  • the central portion of the light beam lacks the blue excitation light, resulting in the central portion of the light exiting from the exit of the optical square bar 109. Yellowish, that is, there is a phenomenon of uneven color.
  • the excitation light ie, blue light
  • the loss at the area coating affects the light uniformity of the light source system 100.
  • a light source system includes an excitation light source, a collection system, a wavelength conversion device, a relay system, a optomechanical system, a detection mechanism, and a distance adjustment mechanism, wherein:
  • the excitation light source is for emitting excitation light
  • the collection system is disposed between the excitation light source and the wavelength conversion device; the excitation light is collected by the collection system and then irradiated to the wavelength conversion device;
  • the wavelength conversion device includes a conversion region and a reflection region, and the wavelength conversion device periodically moves such that the conversion region and the reflection region are periodically located on an optical path of the excitation light; the conversion region is used for The excitation light is converted into a laser light and is emitted, the reflection area is for reflecting and emitting the excitation light; and the laser light and excitation light emitted from the wavelength conversion device are located on the same side of the wavelength conversion device But the optical axes do not coincide;
  • the collection system is further configured to collect the laser light and excitation light emitted from the wavelength conversion device;
  • the relay system is configured to direct the collected laser and excitation light to the optomechanical system, and cause the optical axes of the laser and excitation light to substantially coincide within a preset error range Entering the optomechanical system;
  • the optomechanical system for multiplexing the received laser light and the excitation light and providing the spatial light modulator for modulating image light
  • the detecting mechanism is configured to detect brightness and/or color coordinate information of light emitted by the optomechanical system
  • the distance adjustment mechanism is configured to adjust a distance between the collection system and the wavelength conversion device in accordance with information detected by the detection mechanism, such that brightness and/or color coordinates of the light emitted by the optical system satisfy a preset condition .
  • the received laser light and the excitation light emitted from the wavelength conversion device are located on the same side of the wavelength conversion device but the optical axes do not coincide, that is, due to the After the reflection region is reflected, the optical path of the excitation light is shifted from the incident optical path, so that the excitation light returns from the wavelength conversion device to the region of the region spectroscopic device and the incident region of the excitation light. It is different, and thus the loss caused by the incident region can be avoided without adding additional components, the light utilization efficiency of the light source system is improved, and the light unevenness caused by the loss at the region coating is reduced.
  • the light source system and the display device further include a detecting mechanism and a distance adjusting mechanism, the detecting mechanism is configured to detect brightness and/or color coordinate information of light emitted by the light machine system; the distance adjusting mechanism is used for Adjusting a distance between the collection system and the wavelength conversion device according to the information detected by the detecting mechanism, so that the brightness and/or color coordinate of the light emitted by the optical system meets a preset condition, and then the light source system and The brightness and/or color coordinates of the display device are more suitable for the user's needs, and the user experience is better.
  • the detecting mechanism is configured to detect brightness and/or color coordinate information of light emitted by the light machine system
  • the distance adjusting mechanism is used for Adjusting a distance between the collection system and the wavelength conversion device according to the information detected by the detecting mechanism, so that the brightness and/or color coordinate of the light emitted by the optical system meets a preset condition, and then the light source system and The brightness and/or color coordinates of the display device are more suitable
  • FIG. 1 is a schematic structural view of a prior art light source system.
  • FIG. 2 is a schematic structural view of a region beam splitter of the light source system shown in FIG. 1.
  • Figure 3 is a distance between the collection system of the light source system of Figure 1 and the wavelength conversion device The effect of the change on the luminous flux of the light source system.
  • FIG. 4 is a schematic structural view of a light source system according to a first embodiment of the present invention.
  • Fig. 5 is a schematic structural view of a beam splitter of the light source system shown in Fig. 4.
  • Fig. 6 is a schematic view showing the structure of a wavelength conversion device and a scattering device of the light source system shown in Fig. 4.
  • Fig. 7 is a schematic structural view of a light source system according to a second embodiment of the present invention.
  • Figure 8 is a graph showing the effect of the change in distance between the collection system of the light source system of Figure 7 and the wavelength conversion device on the luminous flux of the light source system.
  • Figure 9 is a graph showing the effect of the change in distance between the collection system of the light source system of Figure 7 and the wavelength conversion device on the color coordinates of the light source system.
  • Figure 10 is a flow chart showing the method of adjusting the brightness and color coordinates of the light source system shown in Figure 7.
  • Fig. 11 is a schematic structural view of a light source system according to a third embodiment of the present invention.
  • Fig. 12 is a schematic structural view of a light source system according to a fourth embodiment of the present invention.
  • Fig. 13 is a schematic structural view of a light source system according to a fifth embodiment of the present invention.
  • Fig. 14 is a view showing the configuration of a region spectroscopic device of the light source system shown in Fig. 13.
  • Fig. 15 is a schematic structural view of a light source system according to a sixth embodiment of the present invention.
  • Fig. 16 is a view showing the configuration of a light source system according to a seventh embodiment of the present invention.
  • Figure 17 is a schematic illustration of the optical path of a curved mirror.
  • Spatial light modulator 240 Spatial light modulator 240
  • FIG. 4 is a schematic structural diagram of a light source system 200 according to a first embodiment of the present invention.
  • the light source system 200 includes an excitation light source 201, a collection system 206a, a wavelength conversion device 207, a relay system 203, a optomechanical system 230, and a distance adjustment mechanism 202.
  • the excitation light source 201 is for emitting excitation light.
  • the collection system 206a is disposed between the excitation light source 201 and the wavelength conversion device 207; the excitation light is collected by the collection system 206a and then irradiated to the wavelength conversion device 207.
  • the wavelength conversion device 207 includes a conversion region 214 and a reflection region 215, and the wavelength conversion device 207 periodically moves such that the conversion region 214 and the reflection region 215 are periodically timed on the optical path of the excitation light;
  • the conversion region 214 is configured to convert the excitation light into a laser light and to emit the light, and the reflection region 215 is configured to reflect the excitation light and then emit the laser light and the excitation light emitted from the wavelength conversion device 207.
  • the collection system 206a is also used to collect the laser light and excitation light emitted from the wavelength conversion device 207.
  • the relay system 203 is configured to guide the collected laser and excitation light to the optical system 230, and cause the optical axes of the laser and excitation light to enter the substantially coincident within a preset error range.
  • the light machine system 230 is described.
  • the optomechanical system 230 is configured to homogenize the laser and the excitation light and provide a spatial light modulator for modulating image light.
  • the distance adjustment mechanism 202 is configured to adjust a distance between the collection system 206a and the wavelength conversion device 207 such that the brightness and/or color coordinates of the light emitted by the optomechanical system 230 satisfy a preset condition.
  • the excitation light source 201 is used to emit excitation light, and the excitation light source 201 may be a semiconductor diode or a semiconductor diode array.
  • the semiconductor diode array may be a laser diode (LD) or the like.
  • the excitation light may be blue light, purple light or ultraviolet light, etc., but is not limited to the above.
  • the excitation light source 201 is a blue light semiconductor laser diode for emitting blue laser light as the excitation light.
  • the relay system 203 includes a light homogenizing device 204, a region spectroscopic device 205, a guiding device 213, a scattering device 210, a first relay lens 206b, and a second relay lens 206c.
  • the light homogenizing device 204 is located on the optical path of the excitation light emitted by the excitation light source 201 for aligning the excitation light emitted by the excitation light source 201. It will be appreciated that in a modified embodiment, the light homogenizing device 204 can be omitted.
  • the area splitting device 205 includes a first area 205a, a second area 205b, and a third area 205e located at a periphery of the first area 205a and the second area 205b, the first area 205a being located in the light homogenizing device
  • the first region 205a of the region spectroscopic device 205 directs (e.g., transmits) the excitation light to the wavelength conversion device 207 on the optical path on which the excitation light is emitted 204, wherein the excitation light is along a predetermined angle ( The incident angle of 30 degrees is obliquely incident on the wavelength conversion device 207, and the second region 205b of the region splitting device 205 is used to guide the excitation light reflected by the wavelength conversion device 207 to the light exit channel.
  • the first region 205a and the second region 205b may both be rectangular regions and are disposed independently of each other, and the third region 205e is a rectangle having two rectangular notches corresponding to the first region 205a and the
  • the area spectroscopic device 205 may include a beam splitter 205c (such as a dichroic color patch) and a mirror 205d.
  • the beam splitter 205c and the mirror 205d are parallel to each other and are substantially opposite to the direction of the excitation light. 45 degrees placed.
  • FIG. 5 is a schematic structural diagram of the beam splitter 205c.
  • the plane of the beam splitter 205c may be substantially rectangular.
  • the beam splitter 205c corresponds to the first region 205a, the second region 205b, and the third.
  • the area 205e is disposed, that is, the beam splitter 205c covers the first area 205a, the second area 205b, and the third area 205e, and the mirror 205d is disposed corresponding to the second area 205b, and the reflection of the second area 205b
  • the mirror 205d reflects the first portion of the excitation light to the light exit channel.
  • the third region 205e may be located at a periphery of the first region 205a and the second region 205b when viewed from a direction perpendicular to the beam splitter 205c.
  • the first region 205a may be located at the One side of the spectroscopic sheet 205c is located substantially at the center of the center of the spectroscopic sheet 205c and one side (the side of the side) of the spectroscopic sheet 205c.
  • the beam splitter 205c at the first region 205a is a coating region that can transmit excitation light, and the beam splitter 205c at the first region 205a can also reflect other wavelengths longer than the excitation light, such as red light, green light, Yellow light.
  • the second region 205b and the beam splitter 205c at the third region 205e are reversed A coating area that emits excitation light and other light such as red light, green light, and yellow light.
  • the collection system 206a is located between the area spectroscopic device 205 and the wavelength conversion device 207, and is used for collecting and collecting light between the area spectroscopic device 205 and the wavelength conversion device 207.
  • the collection system 206a can include a collection lens, such as a convex lens.
  • the collection system 206a can be disposed adjacent to the wavelength conversion device 207, and the excitation light path emitted by the first region 205a is parallel to the optical axis of the collection system 206a but has a predetermined distance, such that the collection system 206a The excitation light is collected such that the excitation light is incident on the wavelength conversion device 207 along the predetermined angle.
  • FIG. 6 is a schematic structural diagram of the wavelength conversion device 207 and the scattering device 210 of the light source system 200 shown in FIG.
  • the reflective area 215 and the conversion area 214 may be segmented regions arranged in a circumferential direction.
  • the wavelength conversion device 207 is rotated in a circumferential direction such that the reflective area 215 is
  • the transition region 214 is sequentially located on the optical path of the excitation light emitted by the collection system 206a.
  • the excitation light transmitted by the first region 205a may be obliquely incident to the reflective region 215 and the conversion region 214 along the predetermined angle (eg, a small angle: 30 degrees).
  • the excitation light is divided according to excitation light incident to different regions, the excitation light including a first portion of excitation light incident to the reflective region 215 and a second portion of excitation light incident to the conversion region 214.
  • the reflective region 215 may include a specular reflective surface having a reflective material for reflecting the first portion of the excitation light, due to the first portion of the excitation light and obliquely incident to the reflective region 215 along the predetermined angle, such that After the reflection region 215 reflects the first partial excitation light at a mirror symmetrical angle, the optical path of the first partial excitation light is offset from the incident optical path, so that the first partial excitation light is from the wavelength conversion device.
  • the second region 205b reflected back to the region spectroscopic device 205 is different from the incident region of the excitation light (ie, the first region 205a), thereby avoiding the incident region without adding additional components.
  • the loss generated by the first region 205a increases the light utilization efficiency of the light source system 200.
  • the conversion region 214 may include a reflective surface provided with a laser-receiving material and a scattering powder for receiving the second partial excitation light, converting the second partial excitation light into a laser light, and the laser light receiving Reflected to the wavelength conversion device.
  • the number of the conversion regions may be one, two or more, wherein each of the conversion regions may emit a laser of one color, and the laser corresponding to the laser may also include a laser of one color (eg, a yellow laser is set)
  • the material produced by the yellow laser, the two colors of the laser (such as red and green lasers generated by the laser material) and the three colors of the laser (such as red, green and yellow laser materials) Red, green and yellow are laserd).
  • the laser light generated by the conversion region 214 is reflected and emitted in the form of Lambertian light, that is, is emitted with a larger beam aperture, and the first partial excitation light reflected by the reflective region 215 is also incident due to a small angle. Reflecting at a small angle, the optical path of the laser beam emitted by the conversion region 214 is different from the optical path of the first partial excitation light emitted by the reflective region 215, wherein the optical path of the laser-receiving optical path is larger, located in the first portion Excite the periphery of the light.
  • the first partial excitation light reflected by the reflective region 215 of the wavelength conversion device 207 is transmitted and collected via the collection system 206a and then guided to the second region 205b of the region spectroscopic device 205.
  • the second region 205b is a region that reflects the excitation light (such as reflecting blue light), so the second region 205b guides the first portion of the excitation light reflected by the reflective region 215 of the wavelength conversion device (eg, Reflected) to the light exit channel 216.
  • the laser light emitted by the conversion region 214 of the wavelength conversion device 207 is transmitted and collected via the collection system 206a and then guided to the region spectroscopic device 205, wherein the aperture of the optical path of the laser light is large,
  • the laser light is also incident on the periphery of the first portion of the excitation light incident region of the region spectroscopic device 205, and the region spectroscopic device 205 also directs (e.g., reflects) the laser light to the light exit channel 216.
  • the light path of the laser light in the light exit channel 216 surrounds the light path of the first partial excitation light in the light exit channel 216, so that the space of the light exit channel 216 of the light source system 200 can be relatively relatively Small, improving the volume of the light source system caused by the large space of the light exit channel is not conducive to miniaturization and miniaturization.
  • the light exit channel 216 includes a first light exit channel 216a and a second light exit channel 216b
  • the area splitting device 205 directs light emitted by the wavelength conversion device 207 via the first light exit channel 216a (eg, Reflecting) to the guiding device 212
  • the guiding device 212 directs (eg, reflects) light in the first light exiting channel 216a to the second light exiting channel 216b.
  • the first relay lens 206b may be located in the first light exit channel between the regional light splitting device 205 and the guiding device 213, and configured to collect and concentrate the light in the first light exit channel 216a. To the guiding device 212.
  • the first relay lens 206b may include a collecting lens such as a convex lens.
  • the guiding device 212 is located on the optical path where the light emitted by the area spectroscopic device 205 is located, and receives the first partial excitation light and the laser received by the area spectroscopic device 205 via the first relay lens 206b. .
  • the scattering device 210 is located on the optical path of the light emitted by the guiding device 212 for receiving the light of the light exiting channel 216 and scattering the light emitted by the light exiting channel 216. Specifically, the scattering device 210 may be collected and concentrated to the scattering device 210 after being collected by the second relay lens 206c.
  • the second relay lens 206c may also include a collecting lens, such as a convex lens, and the second relay lens 206c collects the light emitted by the light exiting channel 216 to the optical system 230 via the scattering device 210. Entrance.
  • the scattering device 210 includes a scattering region 217 and a filter region 218.
  • the scattering region 217 and the filter region 218 are disposed in a circumferential direction.
  • the scattering region 217 And the filter region 218 is alternately located on the optical path where the first partial excitation light and the laser light emitted by the light exit channel 216 are scattered, so that the scattering region 217 scatters the excitation light emitted by the light exit channel 216
  • the filter region 218 filters the laser light emitted from the light exit channel 216 for filtering out other light different from the color of the laser light.
  • the scattering region 217 may be provided with a scattering material
  • the filtering region 218 is provided with a filter material.
  • the number of the filter regions corresponds to the number of the conversion regions, It can be understood that when the number of the conversion regions is one, two or more, and the laser-receiving corresponding portion may also include a laser of one color (such as a yellow laser light generated by setting a yellow laser material), two types. Color lasers (such as red and green lasers with red and green lasers) or three colors of lasers (such as red, green, and yellow lasers, red, green, and yellow lasers) The number of the filter regions may also be one, two or three respectively, and each filter region filters the laser light emitted by a corresponding one of the conversion regions for filtering and receiving the received laser color.
  • a laser of one color such as a yellow laser light generated by setting a yellow laser material
  • Color lasers such as red and green lasers with red and green lasers
  • three colors of lasers such as red, green, and yellow lasers, red, green, and yellow lasers
  • the filter region may also include a color filter material (such as a yellow filter material for filtering yellow laser light) and two color filter materials (such as two sets respectively). Red and green filter material on the filter area or filter material of three colors (such as red, green and yellow filter materials respectively arranged on three filter areas).
  • a color filter material such as a yellow filter material for filtering yellow laser light
  • two color filter materials such as two sets respectively. Red and green filter material on the filter area or filter material of three colors (such as red, green and yellow filter materials respectively arranged on three filter areas).
  • the scattering device 210 and the wavelength conversion device 207 are integrated, and the scattering region 217 and the filter region 218 are located inside the reflection region 215 and the conversion region 214.
  • the scattering device 210 is disposed concentrically with the wavelength conversion device 207 and may have the same drive shaft located at the center of the circle for driving the scattering device 210 and the wavelength conversion device 207 to rotate in the circumferential direction.
  • the optomechanical system 230 is configured to receive the light emitted by the scattering device 210 and to homogenize and combine the light emitted by the scattering device 210.
  • the optomechanical system 230 can include a light machine square bar disposed in front of a spatial light modulator of a display device (eg, a projection device), wherein the spatial light modulator is configured to modulate light emitted by the light machine square bar according to image data To produce the image light needed to display the image.
  • the first partial excitation light collected by the second relay lens 206c is further scattered by the scattering region 217 and then guided to the entrance of the optomechanical system 230, after being collected by the second relay lens 206c.
  • the laser is further filtered through the filter region 218 and directed to the entrance of the optomechanical system 230.
  • the first partial excitation light and the laser received light are sequentially guided to the optical system 230 (ie, are guided to the uniform at different time periods).
  • the optomechanical system 230 combines the first partial excitation light and the received laser light by time division multiplexing.
  • the area spectroscopic device 205 controls the excitation light to be obliquely incident to the reflective area 215 and the conversion area 214 at a predetermined angle via the first area 205a, and the reflective area 215
  • the first portion of the excitation light is reflected to the second region 205b such that the second region 205b directs the first portion of the excitation light to the light exit channel 216, and the first portion is excited after being reflected by the reflective region 215
  • the optical path of the light is offset from the incident optical path and the optical axes are not coincident, so that the first partial excitation light is returned from the wavelength conversion device 207 to the region of the region spectroscopic device 205 and the incident region of the excitation light.
  • the first region is different, thereby avoiding the loss caused by the incident region without adding additional components, improving the light utilization efficiency of the light source system 200 and avoiding the light emission caused by the loss of the coating in the prior art region. Uneven.
  • the excitation light and the received laser light pass through different optical paths, so that not only when the distance between the collection system 206 and the wavelength conversion device 207 is out of focus, The brightness of the light emitted from the square bar of the existing light source is lowered, and the excitation light and the received laser light are different in the light path, and the amplitude of the brightness decrease is different, so that the combined white light color coordinate is also changed.
  • the excitation light excites the wavelength conversion device 207
  • the light beam is obliquely incident along the predetermined angle, and thus, when the distance between the collection system 206a and the wavelength conversion device 207 is defocused, Not only the change in the surface spot size of the wavelength conversion device 207, but also the vertical movement of the position of the spot, causing the spot to move at the position where the light machine bar entrance of the optomechanical system 230 is imaged, thereby The coupling efficiency of the square rod of the optical machine is reduced, and the brightness of the light bar of the optical machine is further reduced.
  • the light source system 200 of the present invention is further provided with a distance adjustment mechanism 202, which can be disposed adjacent to one of the collection system 206a and the wavelength conversion device 207 for adjusting the collection.
  • the distance between the system 206a and the wavelength conversion device 207 by the change in the distance between the collection system 206a and the wavelength conversion device 207, can change the brightness of the light output of the optomechanical system 230, ultimately The luminous flux of the light source system 200 changes, so that The light output of the optomechanical system 230 satisfies the demand.
  • the distance between the collecting system 206a and the wavelength converting device 207 is optimal, that is, the distance adjusting mechanism 202 Adjusting the distance between the collection system 206a and the wavelength conversion device 207 to a distance corresponding to the brightness of the light system 230 is maximized, and the brightness of the light source system 200 is higher and more satisfying to the user. Need, the user experience is better.
  • the excitation efficiency of the wavelength conversion device 207 due to the change in the distance between the collection system 206a and the wavelength conversion device 207, the excitation efficiency of the wavelength conversion device 207, the collection efficiency of the collection system 206a, and the light source system 200 may be affected.
  • the excitation efficiency of the wavelength conversion device 207 can be adjusted by adjusting the distance between the collection system 206a and the wavelength conversion device 207, the collection The collection efficiency of the system 206a, as well as the optomechanical efficiency of the light source system 200, thereby adjusting the light exiting brightness of the light source system 200, such that the efficiency of the light source system 200 is high.
  • Fig. 7 is a schematic structural view of a light source system 200' according to a second embodiment of the present invention.
  • the light source system 200' is substantially identical in structure to the light source system 200 of the first embodiment, that is, the above description of the light source system 200 can be basically applied to the light source system 200', and the difference between the two is mainly It is that the structure of the optomechanical system 230 is different.
  • the distance adjustment mechanism 202 can adjust the distance between the collection system 206a and the wavelength conversion device 207 to cause a change in the brightness of the light emitted by the optomechanical system 230, in a specific embodiment, The distance adjustment mechanism 202 adjusts the distance between the collection system 206a and the wavelength conversion device 207 to change the brightness and color coordinates of the light emitted by the optomechanical system. Therefore, the distance adjustment mechanism 202 can serve as a The adjustment mechanism of the brightness and color coordinates of the optomechanical system 230.
  • the light source system 200' further includes a light source controller 250 for modulating the intensity of the excitation light emitted by the excitation light source 201 to adjust the light intensity of the optomechanical system 230.
  • the optomechanical system 230 includes a light homogenizing device 211 and a first aperture. 231, a second aperture 232, a third aperture 233, a relay lens 234, 235, the first aperture 231 is disposed at an entrance of the light homogenizing device 211, and the relay lens 234 is disposed at the The relay lens 235 is disposed between the second aperture 232 and the third aperture 233 between the light homogenizing device 211 and the second aperture 232.
  • the first aperture 231 is placed at an entrance position of the light homogenizing device 211 (such as a light square bar), and the aperture is the same as the entrance of the optical square bar for filtering out the light exit channel through the scattering device. Stray light on the outside of the entrance of the light bar.
  • the spatial light modulator 240 of the display device may be further disposed on the optical path where the light emitted by the optomechanical system 230 is located.
  • the spatial light modulator 240 is configured to modulate light emitted by the light source system 200 or 200' to generate image light in accordance with image data to be displayed, which may include a DMD spatial light modulator.
  • the second aperture 232 is an aperture stop of the optomechanical system 230 in which light having a beam aperture greater than the pupil aperture does not pass.
  • the third aperture 233 is placed at the position of the spatial modulator of the spatial light modulator 240, the aperture size of which is the same as the size of the light incident surface of the spatial modulator receiving light, that is, the light having a spot size larger than the spatial modulator size cannot By this, the overfill of the light emitted by the light source system 200' can be filtered out.
  • the luminous flux tested at the third aperture 233 is the luminous flux that can be utilized by the actual spatial light modulator 240.
  • the distance adjustment mechanism 202 can be configured to adjust the brightness of the light source, that is, the distance adjustment mechanism 202 adjusts between the collection system 206a and the wavelength conversion device 207.
  • the distance causes the brightness of the light emitted by the optomechanical system 230 to change.
  • the distance adjustment mechanism 202 adjusts the distance between the collection system 206a and the wavelength conversion device 207 to a distance corresponding to when the light exiting brightness of the optomechanical system 230 reaches a maximum.
  • FIG. 8 is a collection system of the light source system 200' shown in FIG. A curve of the effect of the change in the distance L between the 206a and the wavelength conversion device 207 on the luminous flux of the light source system 200' (e.g., the luminous flux of the light exiting the optomechanical system 230). Specifically, when the distance L is decreased, the surface excitation light spot of the wavelength conversion device 207 becomes large, and the excitation light spot moves downward, and the respective optical efficiencies of the light source system 200' vary as follows.
  • the excitation efficiency of the wavelength conversion device 207 when the distance L is decreased, the excitation light power is constant, but the excitation light spot size is increased, the surface light power of the wavelength conversion device 207 is decreased, and the excitation efficiency is improved.
  • the collection efficiency of the collection system 206a when the distance L is decreased, the collection system 206a is closer to the excitation light spot, and the collection efficiency is improved.
  • the optomechanical system 230 i.e., the temperament bar
  • the distance L is reduced, due to the movement of the surface excitation spot of the wavelength conversion device 207, its imaging at the entrance of the optomechanical system 230 is caused.
  • the spot i.e., the excitation light emitted by the light exit passage through the scattering device 210 and the spot of the laser light
  • optomechanical efficiency i.e., efficiency of the optomechanical system 230
  • the optomechanical system 230 i.e., light
  • the entrance beam converges at a large angle.
  • the tempering of the optomechanical system 230 ie, the temperament bar
  • the number of times of light reflection at a large angle increases, and the reflectivity is lost.
  • the light passes through the second aperture 232, the light of a large angle does not pass, and the efficiency of the optical machine is low.
  • the excitation efficiency of the wavelength conversion device 207 when the distance L is increased, the excitation light power is constant, the excitation light spot size is reduced, the surface light power of the wavelength conversion device 207 is decreased, and the excitation efficiency is lowered.
  • the collection efficiency of the collection system 206a when the distance L is increased, the collection system is far away from the excitation light spot, and the collection efficiency is lowered.
  • the optomechanical system 230 i.e., the optical machine bar
  • the distance L is increased, due to the movement of the surface spot of the wavelength conversion device 207, its imaging position at the entrance of the optomechanical system 230 is moved. And filtered by the first aperture 231, so the coupling efficiency of the optomechanical system 230 may decrease.
  • optomechanical efficiency i.e., efficiency of the optomechanical system 230
  • the entrance beam of the optomechanical system 230 i.e., the illuminator square bar
  • Small angle convergence in the process of homogenizing through the optomechanical system 230, the number of light reflections at a small angle is reduced, and the loss of reflectivity is reduced, when the light passes through the second aperture 232, a small angle All of the light passes through, and the optomechanical efficiency (i.e., the efficiency of the optomechanical system 230) is increased to a lesser extent.
  • the luminous flux of the optomechanical system 230 (ie, the light source system 200') can be tested from the light exiting the third aperture 233, wherein The normalized data of the luminous flux is shown in Fig. 8.
  • the tolerance of the distance L is controlled to be within 0.05 mm.
  • Figure 9 is a graph showing the effect of the change in distance between the collection system 206a of the light source system 200' of Figure 7 and the wavelength conversion device 207 on the color coordinates of the light source system 200'. As can be seen from FIG.
  • the color coordinates of the white light emitted from the light source system 200' tested at the exit of the third aperture 233 may change, that is, when the collection system
  • the distance L between the 206a and the wavelength conversion device 207 changes, both the brightness and the color coordinate of the light emitted from the optomechanical system 230 change, wherein the value of the distance L and the color coordinate change curve Figure 9 shows.
  • the color coordinate (x, y) includes an x value and a y value
  • the curve CIE-x in FIG. 9 is a curve of a color coordinate x value and a distance L
  • the curve CIE-y is a color coordinate y value and a distance L. Curve.
  • the light source system 200' of the present invention As can be seen from the graphs of Fig. 8 and Fig. 9, the light source system 200' of the present invention.
  • the requirement for the distance between the collection system 206a and the wavelength conversion device 207 is higher than that of the existing light source system, but the distance adjustment mechanism 202 and the optomechanical system 230 in the above embodiment may be adjusted such that the light source The system 200' has the highest brightness, which maximizes the efficacy of the light source system 200'.
  • the distance between the collection system 206a and the wavelength conversion device 207 not only affects the luminous flux of the light source system 200', but also affects the light emission (ie, the white light after the excitation light is combined with the laser light).
  • the color coordinates, and thus the distance adjustment mechanism 202 and the optomechanical system 230 can be utilized to achieve a highly consistent dynamic light source.
  • the amplitude of the change in the laser efficiency is the same.
  • all the laser light is regarded as a yellow laser, and the color coordinates are (x Y , y Y ), and the brightness is For L Y , the blue excitation color coordinate is (x B , y B ), the luminance is L B , and L Y is much larger than L B .
  • the white light color coordinates after the merging is (x, y) and the brightness is L. According to the colorimetric theory, the white light color coordinates (x, y) and the brightness L can be obtained as follows:
  • the efficiency of the laser light is decreased by a larger magnitude relative to the blue excitation light, so the relative value of L B is increased, and the x and y of the color coordinates when synthesizing white light are synthesized.
  • the value will decrease, drifting to the lower left in the color gamut color coordinate, and the large decrease in the laser light also causes the white light brightness to decrease more; when the collection system 206a is between the collection system 206a and the wavelength conversion device 207 When the distance L is close, the efficiency of the blue excitation light decreases more than that of the laser, so the relative value of L Y increases, and the x and y values of the color coordinates increase when the white light is synthesized, and the color coordinates are plotted in the color gamut. Drift to the upper right.
  • the transmittance spectra of the different light source systems 200' are different due to the difference in the plating of the optical device and the processing, thereby causing the light source system 200' to The color coordinates of the light are different.
  • the adjustment of the consistency of the light source system 200' can be performed just by the principle of variable color coordinates described above.
  • the first and second two light source systems 200', the first light source system 200' color coordinates and brightness are 0.279, 0.288, 8000 lm, and the first light source system 200' color coordinates and brightness are 0.281, 0.292, 8500 lm, in order to
  • the light source system 200' has a higher light color temperature and the light source system 200' has the same color brightness.
  • the second light source system 200' is adjusted, and the distance between the collection system and the wavelength conversion device is about 0.05 mm, and the white light color coordinates are shifted to the left until the color thereof.
  • the coordinates are the same as those of the first light source system 200', and the colors of the two light source systems 200' are consistent.
  • the brightness of the second light source system 200' is adjusted to about 8300 lm.
  • the brightness of the two light source systems 200' is inconsistent, and the second The light source system 200' is brighter than the first light source system 200', and the current of the excitation light source of the second light source system 200' can be lowered by the light source controller 250 of the second light source system 200' to make its light output brightness and the first light source system 200 'Achieve consistency.
  • the color and brightness of the two light source systems 200' are consistent, so the light source system 200' is particularly suitable for illumination and projection systems that require very high light output uniformity, such as walling.
  • the light source system 200' further includes a detecting mechanism 260, which may be brightness and The color detecting mechanism is configured to detect the brightness and color coordinates of the light emitted by the light source system 200', such as detecting the color coordinates and brightness of the mixed light of the laser light and the excitation light emitted by the light machine system 230.
  • the detecting mechanism 260 may be disposed at a light exiting portion of the light source system 200' (e.g., at a light exit of the optomechanical system 230).
  • the distance adjustment mechanism 202 is configured to adjust the distance between the collection system 206a and the wavelength conversion device 207 in accordance with the information detected by the detection mechanism, such that the brightness and/or color coordinates of the light emitted by the optomechanical system 230 are satisfied. Preset conditions.
  • the detecting mechanism 260 detects the brightness of the laser light emitted by the optomechanical system 230, the excitation light, or the mixed light of the laser light and the excitation light, and the distance adjusting mechanism 202 will The distance between the collection system 206a and the wavelength conversion device 207 The distance corresponding to the maximum brightness that can be detected by the detecting mechanism 260 is adjusted. That is, the preset condition is that the maximum brightness that can be detected by the detecting mechanism 260 or the light emitted by the optomechanical system 230 reaches the maximum brightness.
  • the distance between the collecting system 206a and the wavelength converting device 207 is the best, that is, The distance adjusting mechanism 202 adjusts the distance between the collecting system 206a and the wavelength converting device 207 to a distance corresponding to when the light emitting brightness of the optical system 230 reaches a maximum, so that the light detected by the detecting mechanism 260 reaches The maximum brightness, that is, the light output of the optomechanical system 230 reaches the maximum brightness.
  • the distance adjustment mechanism 202 further adjusts the wavelength conversion device 207 and the color based on the brightness and color coordinates of the emitted light of the optomechanical system 230 detected by the detection mechanism 260.
  • the detecting mechanism 260 can detect the color coordinates and brightness of the mixed light of the laser light and the excitation light emitted by the optomechanical system 230.
  • the distance adjustment mechanism 202 adjusts the distance between the collection system 206a and the wavelength conversion device 207 according to the color coordinates detected by the detection mechanism 260, so that the color coordinates detected by the detection mechanism 260 reach the target color coordinates.
  • the distance adjusting mechanism 202 sets the wavelength converting device 207 and the collecting system 206a. The distance between the two is reduced; when the color coordinate detected by the detecting mechanism 260 is smaller than the target color coordinate, the distance adjusting mechanism 202 increases the distance L between the wavelength converting device 207 and the collecting system 206a. When the color coordinate detected by the detecting mechanism 260 is equal to the target color coordinate, the distance adjusting mechanism 202 maintains the distance L between the wavelength converting device 207 and the collecting system 206a unchanged.
  • the target color coordinate can be input to the light source system 200' through an input device (such as a keyboard, a touch screen, an OSD button, etc.) or a display device using the light source system 200', such that the light source system 200 'or the display device using the light source system 200' can learn the target color coordinates and perform the above-described comparison of the color coordinates and the target color coordinates, and control the distance adjustment mechanism 202 according to the comparison result.
  • the distance L is adjusted such that the actual color coordinates of the light source system 200' can reach the target color coordinates.
  • the detecting mechanism 260 may output a signal of the current color coordinate to the distance adjusting mechanism 202
  • the distance adjusting mechanism 202 may include a signal processing unit and an adjusting unit, where the signal processing unit is configured to The current color coordinate is compared with the target color coordinate, and the adjustment unit is controlled to adjust the distance L according to the comparison result output control signal.
  • the light source controller 250 can adjust the intensity of the excitation light emitted by the excitation light source according to the brightness detected by the detecting mechanism 260, so that the brightness detected by the detecting mechanism 260 reaches the target brightness. . Specifically, the light source controller 250 modulates the intensity of the excitation light based on the brightness and color coordinates of the emitted light of the light source system 200' detected by the detecting mechanism 260. Referring to FIG. 10, when the brightness (ie, the current brightness) of the light emitted by the optomechanical system 230 detected by the detecting mechanism 260 is greater than the target brightness, the light source controller 250 drives the driving current of the excitation light source 201. The decrease is such that the intensity of the excitation light is lowered.
  • the light source controller 250 increases the driving current of the excitation light source 201, and the intensity of the excitation light increases.
  • the light source controller 250 maintains the driving current of the excitation light source 201 unchanged, and the intensity of the excitation light remains unchanged.
  • the target brightness can also be input to the light source system 200 ′ through an input device (such as a keyboard, a touch screen, an OSD button, etc.) or a display device using the light source system 200 ′ such that the light source system 200 'Or the display device using the light source system 200' can learn the target brightness and perform the above steps of comparing the current brightness with the target brightness, and the light source controller 250 can perform the driving current of the excitation light source 201 according to the comparison result. Adjusting to adjust the luminous flux of the light source system 200' by adjusting the intensity of the excitation light.
  • the comparison adjustment step of the color coordinates of the light source system 200' may be before the step of adjusting the brightness comparison, that is, after the detection mechanism 260 detects the color coordinates and the brightness value, the light source Distance adjustment mechanism 202 of system 200' After comparing the color coordinate and the target color coordinate, and controlling the color coordinate to be the target color coordinate according to the comparison result, the light source system 200' compares the brightness and the target brightness, and adjusts the adjustment according to the comparison result.
  • the brightness is the target brightness.
  • the two or more numbers of the light source systems are required.
  • the target color coordinate and the target brightness can be input into each light source system 200', and each light source system 200' adjusts its own color through its distance adjustment mechanism 202 and the light source controller 250.
  • the coordinates and brightness reach the target color coordinate and the target brightness. It can be understood that, since the brightness of the respective light source systems 200' may be different, in order to ensure that the adjusted brightness of the respective light source systems 200' is consistent, the minimum of the plurality of brightnesses in the current respective light source systems 200' may be determined in advance.
  • each of the light source systems 200' can be adjusted to the minimum value, thereby using two or more of the light source systems for an environment such as a wall or the like.
  • the brightness of the display device of 200' and the light source system 200' is uniform.
  • FIG. 11 is a schematic structural diagram of a light source system 300 according to a third embodiment of the present invention.
  • the light source system 300 has substantially the same structure as the light source system 200' of the second embodiment, that is, the above description of the light source system 200' can be basically applied to the light source system 300, and the difference between the two is mainly It is that the area spectroscopic device 305 is different.
  • the reflective surface of the mirror 305d of the area spectroscopic device 305 is a curved surface, such as a concave surface.
  • the concave reflective surface of the mirror 305d receives the first portion of the excitation light emitted by the wavelength conversion device 307 via the collection system 306a and reflects the first portion of the excitation light to the light exit channel 316.
  • the beam splitter 305c also receives a portion of the received laser light transmitted through the mirror and reflects the portion to the light exit channel 316.
  • FIG. 12 is a schematic structural diagram of a light source system 400 according to a fourth embodiment of the present invention.
  • the light source system 400 is substantially identical in structure to the light source system 200' of the second embodiment, that is, the above description of the light source system 200' is basically
  • the difference between the two is mainly that the area splitting means 405 is different.
  • the reflective surface of the mirror 405d of the area spectroscopic device 405 is a curved surface, such as a convex surface, and the mirror 405d is disposed on a side of the beam splitter 405c away from the wavelength conversion device 407.
  • the convex reflective surface of the mirror 405d receives the first portion of the excitation light transmitted through the beam splitter and reflects the first portion of the excitation light to the light exit channel 416.
  • the beam splitter 405c receives the received laser light emitted by the wavelength conversion device 407 via the collection system 406a, and reflects the received laser light to the light exit channel 416.
  • FIG. 13 is a schematic structural diagram of a light source system 500 according to a fifth embodiment of the present invention
  • FIG. 14 is a schematic structural view of a region light splitting device of the light source system 500 shown in FIG.
  • the light source system 500 is substantially identical in structure to the light source system 200' of the second embodiment, that is, the above description of the light source system 200' can be basically applied to the light source system 500, and the difference between the two is mainly It is that the regional spectroscopic device 505 is different from the guiding device 512.
  • the area spectroscopic device 505 includes a beam splitter 505c that is substantially the same as the beam splitter 505c in the first embodiment, the first region 505a transmits the excitation light emitted by the excitation light source 501, and the second The region 505b reflects the laser and the first portion of the excitation light, and the structural principle is not described herein.
  • the guiding device 512 includes a beam splitter 508 and a mirror 509. The beam splitter 508 receives the region beam splitting device 505 via the first light exit channel.
  • the laser received by the 516a and the reflected laser light are reflected to the second light exiting passage 516b, and the mirror 509 receives the first partial excitation light emitted by the area spectroscopic device 505 via the first light exiting passage 516a.
  • the first portion of the excitation light is reflected to the second light exit channel 516b.
  • the mirror 509 is also a curved mirror, and the reflective surface is a curved surface, such as a convex surface, and the beam splitter 508 transmits the first partial excitation light in the first light exit channel 516a to the a mirror 509, the mirror 509 reflects the first partial excitation light and the first partial excitation light is transmitted to the second light exit channel 516b via the beam splitter.
  • FIG. 15 is a schematic structural diagram of a light source system 600 according to a sixth embodiment of the present invention.
  • the structure of the light source system 600 and the light source system 500 of the fifth embodiment Substantially the same, that is, the above description of the light source system 500 can be substantially applied to the light source system 600, the difference being mainly due to the fact that the mirror 609 of the guiding device 612 is different.
  • the reflecting surface of the mirror 609 of the guiding device 612 is also a curved surface, but is a concave surface, and the position of the reflecting mirror 609 is also slightly different from that in the sixth embodiment.
  • At least a portion of the received laser light in the first light exit passage 616a is transmitted to the beam splitter 608 via the mirror 609, and the splitter sheet 608 transmits the at least a portion of the received laser light to the mirror via the mirror 609
  • the second light exit passage 616b is described.
  • FIG. 16 is a schematic structural diagram of a light source system 700 according to a seventh embodiment of the present invention.
  • the light source system 700 has substantially the same structure as the light source system 200' of the second embodiment, that is, the above description of the light source system 200' can be basically applied to the light source system 700, and the difference between the two is mainly
  • the structure of the wavelength conversion device 707, the regional beam splitting device 705 of the relay system, and the scattering device 710 are different, and the light exit channel 716 is also slightly different.
  • the area spectroscopic device 705 includes a beam splitter 705c and a mirror 705d.
  • the beam splitter 705c is disposed corresponding to the first region
  • the mirror 705d is disposed corresponding to the second region
  • the beam splitter 705c of the first region is A first surface receives the excitation light and reflects the excitation light to the wavelength conversion device 707, the wavelength conversion device 707 reflecting the first partial excitation light to a mirror 705d of the second region
  • the mirror 705d reflects the first partial excitation light to a second surface of the beam splitter 705c of the first region opposite to the first surface, and the second surface of the beam splitter 705c of the first region
  • the first portion of the excitation light is reflected to the light exit channel 716, and the wavelength conversion device 707 is also reflected by the laser light to the light exit channel 716.
  • the mirror 705d is also a curved mirror, which is a mirror whose convex surface is convex.
  • the scattering device 710 and the wavelength conversion device 707 are two separate elements disposed separately, and the scattering device 710 is configured to receive the light of the light exit channel 716 and provide the scattered light to the entrance of the light machine system 730.
  • the relay lens 706c is configured to collect light of the light exit channel 716 such that light of the light exit channel 716 is imaged to the entrance of the light system 730 via the scattering device 710.
  • the optical path is shorter, and at the same time, the light source is relatively light.
  • the path of light traveled in system 200 is relatively long such that the excitation light spot at the entrance of the optomechanical system 230 is an out-of-focus image before the excitation light converges at the entrance of the optomechanical system 230 (e.g., the optical square bar). This will affect the coupling efficiency and uniformity of the light source system 200.
  • the curved mirrors 305d, 405d, 509, 609, 705d function similarly to the lens, participate in imaging, and can converge or diverge light.
  • the concave mirrors 305d, 609 can converge the angle of the reflected light, which has the same function as the convex lens; as shown in Fig. 17 (C) (D), the convex surface
  • the mirrors 405d, 509, 705d can diverge the angle of the reflected light, and have the same function as the concave lens.
  • the curved mirror 305d, 405d, 509, 609, 705d can be used to zoom in or out the optical path of the excitation light to make the excitation light and the laser received. Both are concentrated at the entrance of the light homogenizing device, which is beneficial to improve color uniformity.
  • the optical path of the excitation light is longer than the optical path of the laser, and the excitation light passes through the convex mirror.
  • the optical path is extended in the imaging process, and finally concentrated at the entrance of the light homogenizing device.
  • the optical path of the excitation light is shorter than the optical path of the red-green light, and when the light beam passes through the concave mirror, the reflected light beam converges.
  • the optical path is zoomed in during imaging.
  • the curvature is small.
  • the wavelength of the excitation light is short, and the optical path itself is short relative to the laser light, so the curvature required for the concave mirror here is relatively small.
  • the curvature is different from the difference between the excitation light and the laser path length. The larger the difference, the greater the curvature required. Since the mirror is an intermediate device for imaging, the curvature can be optimized by software simulation.
  • the present invention also provides a display device, which can be applied to a projector, an LCD (Liquid Crystal Display) display, etc., and the display device can include a light source system, a spatial light modulator, and a projection lens.
  • the light source system employs the light source devices 200, 200', 300, 400, 500, 600, 700 in the above embodiment.
  • the spatial light modulator is configured to output image light according to the light emitted by the light source system and the input image data
  • the projection lens is configured to display the projected image according to the image light.
  • the display device using the above-described light source devices 200, 200', 300, 400, 500, 600, 700 has a high light utilization rate and a good color uniformity of an image.
  • the light source devices 200, 200', 300, 400, 500, 600, 700 of the present invention can also be used for a stage light system, an in-vehicle lighting system, a surgical lighting system, etc., and are not limited to the above-described display devices.

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Abstract

一种光源系统（ 200、200'、300、400、500、600、700）包括激发光源（201、501）、收集系统（ 206a、406a）、波长转换装置（207、407、707）、中继系统（203）、光机系统（230、730）、检测机构（260）和距离调节机构（202）。激发光源（201、501）发出激发光，激发光经收集系统（ 206a、406a）后照射至波长转换装置（207、407、707），波长转换装置（207、407、707）包括转换区域（214）和反射区域（215），波长转换装置（207、407、707）周期性运动使转换区域（214）和反射区域（215）分时位于激发光的光路上；转换区域（214）将激发光转换为受激光并出射，反射区域（215）将激发光反射后出射；从波长转换装置（207、407、707）出射的受激光和激发光光轴不重合，收集系统（ 206a、406a）还收集受激光及激发光，被收集的受激光及激发光经由中继系统（203）被引导至光机系统（230、730），检测机构（260）检测光机系统（230、730）出射的光的亮度和/或色坐标信息，距离调节机构（202）调节收集系统（ 206a、406a）与波长转换装置（207、407、707）之间的距离以使光机系统（230、730）出射的光的亮度和/或色坐标满足预设条件。

Description

光源系统及显示设备 技术领域
本发明涉及一种光源系统及显示设备。
背景技术
目前，在显示(如投影领域)以及照明领域都开始越来越广泛的应用激光源，由于具有能量密度高，光学扩展量小的优势，在高亮度光源领域，激光源已经逐渐取代灯泡和LED光源。而在这其中，采用第一光源激发受激光粉产生所需光线(如蓝光激光激发黄色受激光粉产生白光或特定颜色的光)的光源系统，以其光效高、稳定性好、成本低等优点成为应用的主流。
请参阅图1及图2，图1是一种现有技术光源系统100的结构示意图，图2是图1所示光源系统100的区域分光片103的结构示意图。所述光源系统包括激发光源101、匀光器件102、区域分光片103、收集系统104、波长转换装置105、中继透镜106与108、反射镜107、光机方棒109。
所述激发光源101一般为蓝色激光光源，其发出蓝色激发光，所述蓝色激发光经过所述匀光器件102匀光后，再通过所述区域分光片103，如图2所示，所述区域分光片103的中心为透蓝反黄性质的区域镀膜，周围是反射镜，所述蓝色激发光从所述区域分光片103的区域镀膜处透射，经过所述收集系统104(如收集透镜)汇聚于所述波长转换装置105上，激发所述波长转换装置105产生受激光(如红色受激光、绿色受激光、或黄色受激光)，部分未转换的蓝色激发光与受激光以朗伯光的形式出射，经过所述收集系统104收集后，在所述区域分光片103处被反射，其中所述部分蓝色激发光在区域镀膜处会因透射而损失，造成所述光源系统100的光利用率较低。
此外，所述区域分光片103反射的蓝色激发光与受激光依序经过所述中继透镜106、所述反射镜107、中继透镜108成像到所述光机方棒109入口，最终从所述光机方棒109出口出射。然而，入射到所述光机方棒109的光束中，由于上述区域镀膜处的激发光损失的存在，光束中心部分缺少蓝色激发光，造成在从光机方棒109出口出射的光中心部分偏黄，即存在颜色不均匀的现象。
综上所述，在现有的光源系统100中，激发光(即蓝色光)因区域镀膜的损失造成光利用率较低，并且区域镀膜处的损失对光源系统100的出光均匀性也造成影响。
发明内容
针对以上技术问题，有必要提供一种可改善上述问题的光源系统及显示设备。
一种光源系统，其包括激发光源、收集系统、波长转换装置、中继系统、光机系统、检测机构和距离调节机构，其中：
所述激发光源用于发出激发光；
所述收集系统设置于所述激发光源及所述波长转换装置之间；所述激发光经所述收集系统收集后照射至所述波长转换装置；
所述波长转换装置包括转换区域和反射区域，所述波长转换装置周期性运动，使得所述转换区域和反射区域分时地周期性位于所述激发光的光路上；所述转换区域用于将所述激发光转换为受激光并出射，所述反射区域用于将所述激发光反射后出射；从所述波长转换装置出射的所述受激光和激发光位于所述波长转换装置的同一侧但光轴不重合；
所述收集系统还用于收集从所述波长转换装置出射的所述受激光及激发光；
所述中继系统用于将所述收集的受激光及激发光引导至所述光机系统，并使得所述受激光及激发光的光轴在预设误差范围内大致重合 地进入所述光机系统；
所述光机系统，用于将所述受激光和所述激发光进行匀光以及提供至用于调制图像光的空间光调制器；
当所述收集系统与所述波长转换装置之间的距离发生变化时，从所述光机系统出射的光的亮度和色坐标发生变化；
所述检测机构用于检测所述光机系统出射的光的亮度和/或色坐标信息；
所述距离调节机构用于配合所述检测机构检测的信息而调节所述收集系统与波长转换装置之间的距离，使得所述光机系统出射的光的亮度和/或色坐标满足预设条件。
与现有技术相比较，所述光源系统及显示设备中，从所述波长转换装置出射的所述受激光和激发光位于所述波长转换装置的同一侧但光轴不重合，即由于经所述反射区域反射后，所述激发光的光路相较于入射光路发生了偏移，从而所述激发光从所述波长转换装置返回至所述区域分光装置的区域与所述激发光的入射区域是不同的，进而在不增加额外元件的情况下可以避免所述入射区域产生的损耗，提高所述光源系统的光利用率以及减少区域镀膜处损失造成的出光不均。
进一步地，所述光源系统及显示设备还包括检测机构与距离调节机构，所述检测机构用于检测所述光机系统出射的光的亮度和/或色坐标信息；所述距离调节机构用于配合所述检测机构检测的信息而调节所述收集系统与波长转换装置之间的距离，使得所述光机系统出射的光的亮度和/或色坐标满足预设条件，进而所述光源系统与显示设备的亮度和/或色坐标更满足使用者的需要，用户体验更好。
附图说明
图1是一种现有技术光源系统的结构示意图。
图2是图1所示光源系统的区域分光片的结构示意图。
图3是图1所示光源系统的收集系统与波长转换装置之间的距离 变化对所述光源系统的光通量的影响曲线。
图4是本发明第一实施方式的光源系统的结构示意图。
图5是图4所示光源系统的分光片的结构示意图。
图6是图4所示光源系统的波长转换装置及散射装置的结构示意图。
图7是本发明第二实施方式的光源系统的结构示意图。
图8是图7所示光源系统的收集系统与波长转换装置之间的距离变化对所述光源系统的光通量的影响曲线。
图9是图7所示光源系统的收集系统与波长转换装置之间的距离变化对所述光源系统的色坐标的影响曲线。
图10是图7所示光源系统的亮度及色坐标调节方法的流程图。
图11是本发明第三实施方式的光源系统的结构示意图。
图12是本发明第四实施方式的光源系统的结构示意图。
图13是本发明第五实施方式的光源系统的结构示意图。
图14是图13所示光源系统的区域分光装置的结构示意图。
图15是本发明第六实施方式的光源系统的结构示意图。
图16是本发明第七实施方式的光源系统的结构示意图。
图17是曲面反射镜的光路原理示意图。
主要元件符号说明
光源系统        200、200’、300、400、500、600、700、
激发光源        201、501
波长转换装置    207、407、707
中继系统        203
匀光器件        204
区域分光装置    205、305、405、505、705
引导装置        212、512、612
散射装置        210、710
光机系统        230、730
收集系统        206a、406a
中继透镜        206b、206c、234、235、706c
第一区域        205a、505a
第二区域        205b、505b
反射区域        215
转换区域        214
散射区域        217
滤光区域        218
出光通道        216、316、416、716
分光片          205c、305c、405c、508、608、705c
反射镜          205d、305d、405d、509、609、705d
第一出光通道    216a、516a、616a
第二出光通道    216b、516b、616b
距离调节机构    202
光源控制器      250
空间光调制器    240
光机系统        230
第一光阑        231
第二光阑        232
第三光阑        233
检测机构        260
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
请参阅图4，图4是本发明第一实施方式的光源系统200的结构示意图。该光源系统200包括激发光源201、收集系统206a、波长转换装置207、中继系统203、光机系统230、和距离调节机构202。
所述激发光源201用于发出激发光。所述收集系统206a设置于所述激发光源201及所述波长转换装置207之间；所述激发光经所述收集系统206a收集后照射至所述波长转换装置207。所述波长转换装置207包括转换区域214和反射区域215，所述波长转换装置207周期性运动，使得所述转换区域214和反射区域215分时地周期性位于所述激发光的光路上；所述转换区域214用于将所述激发光转换为受激光并出射，所述反射区域215用于将所述激发光反射后出射；从所述波长转换装置207出射的所述受激光和激发光位于所述波长转换装置207的同一侧但光轴不重合。所述收集系统206a还用于收集从所述波长转换装置207出射的所述受激光及激发光。所述中继系统203用于将所述收集的受激光及激发光引导至所述光机系统230，并使得所述受激光及激发光的光轴在预设误差范围内大致重合地进入所述光机系统230。所述光机系统230用于将所述受激光和所述激发光进行匀光以及提供至用于调制图像光的空间光调制器。当所述收集系统206a与所述波长转换装置207之间的距离发生变化时，从所述光机系统230出射的光的亮度和色坐标发生变化。所述距离调节机构202用于调节所述收集系统206a与波长转换装置207之间的距离，使得所述光机系统230出射的光的亮度和/或色坐标满足预设条件。
具体地，所述激发光源201用于发出激发光，所述激发光源201可以为半导体二极管或者半导体二极管阵列。所述半导体二极管阵列可以为激光二极管(LD)等。该激发光可以为蓝色光、紫色光或者紫外光等，但并不以上述为限。本实施方式中，所述激发光源201为蓝色光半导体激光二极管，用于发出蓝色激光作为所述激发光。
所述中继系统203包括匀光器件204、区域分光装置205、引导装置213、散射装置210、第一中继透镜206b及第二中继透镜206c。所述匀光器件204位于所述激发光源201发出的所述激发光所在的光路上，用于对所述激发光源201发出的所述激发光进行匀光。可以理解，在变更实施方式中，所述匀光器件204可以被省略。
所述区域分光装置205包括第一区域205a、第二区域205b及位于所述第一区域205a与所述第二区域205b外围的第三区域205e，所述第一区域205a位于所述匀光器件204发出的所述激发光所在的光路上，所述区域分光装置205的第一区域205a将所述激发光引导(如透射)至所述波长转换装置207，其中所述激发光沿预定角度(如30度的入射角)倾斜入射至所述波长转换装置207，所述区域分光装置205的第二区域205b用于将所述波长转换装置207反射的激发光引导至出光通道。所述第一区域205a与所述第二区域205b可以均为矩形区域且相互独立设置，所述第三区域205e为具有对应所述第一区域205a与第二区域205b的两个矩形缺口的矩形区域。
具体地，所述区域分光装置205可以包括分光片205c(如二向色片)及反射镜205d，所述分光片205c及反射镜205d相互平行且均相较于所述激发光的方向大致呈45度放置。请参阅图5，图5是所述分光片205c的结构示意图，平面上，所述分光片205c可以大致呈矩形，所述分光片205c对应所述第一区域205a、第二区域205b及第三区域205e设置，即所述分光片205c覆盖所述第一区域205a、第二区域205b及第三区域205e，所述反射镜205d对应所述第二区域205b设置，所述第二区域205b的反射镜205d将所述第一部分激发光反射至所述出光通道。
具体地，从垂直于所述分光片205c的方向看，所述第三区域205e可以位于所述第一区域205a及第二区域205b的外围，具体地，所述第一区域205a可以位于所述分光片205c的一侧，大致位于所述分光片205c的中心与所述分光片205c其中一侧边(如下侧边)的中央位置。
所述第一区域205a处的分光片205c为可透射激发光的镀膜区域，所述第一区域205a处的分光片205c还可以反射波长长于所述激发光其他光，如红色光、绿色光、黄色光。所述第二区域205b与第三区域205e处的分光片205c(即所述第一区域205a以外的区域)为可以反 射激发光及其他光(如红色光、绿色光、黄色光)的镀膜区域。
所述收集系统206a位于所述区域分光装置205及所述波长转换装置207之间，用于对所述区域分光装置205及所述波长转换装置207之间的光进行汇聚、收集处理。具体地，所述收集系统206a可以包括收集透镜，如凸透镜。所述收集系统206a可以邻近所述波长转换装置207设置，且所述第一区域205a发出的激发光光路相较于所述收集系统206a的光轴平行但是具有预定距离，从而所述收集系统206a对所述激发光进行收集后使得所述激发光沿所述预设角度入射至所述波长转换装置207。
请参阅图6，图6是图4所示光源系统200的波长转换装置207及散射装置210的结构示意图。所述反射区域215与所述转换区域214可以为圆周方向依序设置的分段区域，所述光源系统200工作时，所述波长转换装置207沿圆周方向转动使得所述反射区域215与所述转换区域214依序位于所述收集系统206a发出的所述激发光所在的光路上。所述第一区域205a透射的激发光可以沿所述预定角度(如较小的角度：30度)倾斜入射至所述反射区域215及所述转换区域214。按照入射到不同区域的激发光做划分，所述激发光包括入射到所述反射区域215的第一部分激发光及入射到所述转换区域214的第二部分激发光。
所述反射区域215可以包括具有反射材料的镜面反射表面，用于将所述第一部分激发光反射，由于所述第一部分激发光及沿所述预定角度倾斜入射至所述反射区域215，使得所述反射区域215对所述第一部分激发光进行镜像对称角度的反射后，所述第一部分激发光的光路相较于入射光路发生了偏移，从而所述第一部分激发光从所述波长转换装置207反射回所述区域分光装置205的第二区域205b与所述激发光的入射区域(即所述第一区域205a)是不同的，进而在不增加额外元件的情况下可以避免所述入射区域(即所述第一区域205a)产生的损耗，提高所述光源系统200的光利用率。
所述转换区域214可以包括设置有受激光材料与散射粉的反射表面，用于接收所述第二部分激发光、并将所述第二部分激发光转换为受激光、以及将所述受激光反射至所述波长转换装置。所述转换区域的数量可以为一个、两个或多个，其中每个转换区域可以发出一种颜色的受激光，所述受激光对应也可以包括一种颜色的受激光(如设置黄色受激光材料产生的黄色受激光)、两种颜色的受激光(如设置红色与绿色受激光材料产生的红色与绿色受激光)或三种颜色的受激光(如设置红色、绿色及黄色受激光材料产生的红色、绿色及黄色受激光)。其中，所述转换区域214产生的受激光以朗伯光的形式反射射出，即以较大的光束孔径出射，而所述反射区域215反射的所述第一部分激发光由于由小角度入射而也以小角度反射，使得所述转换区域214发出的受激光的光路与所述反射区域215发出的第一部分激发光的光路不同，其中所述受激光的光路的孔径较大，位于所述第一部分激发光的外围。
进一步地，所述波长转换装置207的反射区域215反射的所述第一部分激发光经由所述收集系统206a透射与收集后被引导至所述区域分光装置205的第二区域205b。所述第二区域205b为反射所述激发光(如反射蓝色光)的区域，故，所述第二区域205b将所述波长转换装置的反射区域215反射的所述第一部分激发光引导(如反射)至出光通道216。所述波长转换装置207的转换区域214发出的所述受激光经由所述收集系统206a透射与收集后被引导至所述区域分光装置205，其中由于所述受激光的光路的孔径较大，故所述受激光还入射至所述区域分光装置205的所述第一部分激发光入射区域的外围，所述区域分光装置205还将所述受激光引导(如反射)至所述出光通道216。其中，所述受激光在所述出光通道216中的光路通道将所述第一部分激发光在所述出光通道216中的光路通道包围，从而所述光源系统200的出光通道216的空间可以相对较小，改善出光通道空间较大造成的光源系统体积较大不利于小型化微型化等问题。
本实施方式中，所述出光通道216包括第一出光通道216a及第二出光通道216b，所述区域分光装置205将所述波长转换装置207发出的光经由所述第一出光通道216a引导(如反射)至所述引导装置212，所述引导装置212将所述第一出光通道216a中的光引导(如反射)至所述第二出光通道216b。
所述第一中继透镜206b可以位于所述区域分光装置205与所述引导装置213之间的第一出光通道中，用于对所述第一出光通道216a中的光进行收集与汇聚后提供至所述引导装置212。所述第一中继透镜206b可以包括收集透镜，如凸透镜。
所述引导装置212位于所述区域分光装置205发出的光所在的光路上，其经由所述第一中继透镜206b接收所述区域分光装置205反射的所述第一部分激发光及所述受激光。
所述散射装置210位于所述引导装置212发出的光所在的光路上，用于接收所述出光通道216的光并对所述出光通道216出射的光进行散射。具体地，所述散射装置210可以经由所述第二中继透镜206c收集汇聚后被引导至所述散射装置210。其中，所述第二中继透镜206c也可以包括收集透镜，如凸透镜，所述第二中继透镜206c将所述出光通道216发出的光经由所述散射装置210收集至所述光机系统230的入口。
请参阅图6，所述散射装置210包括散射区域217与滤光区域218，所述散射区域217与所述滤光区域218沿圆周方向设置，所述光源系统200工作时，所述散射区域217与所述滤光区域218交替位于所述出光通道216射出的所述第一部分激发光与所述受激光所在的光路上，使得所述散射区域217对所述出光通道216出射的激发光进行散射，所述滤光区域218对所述出光通道216出射的所述受激光进行过滤，用于滤除与所述受激光颜色不同的其他光。可以理解，所述散射区域217可以设置有散射材料，所述滤光区域218设置有滤光材料。
本实施方式中，所述滤光区域的数量与所述转换区域的数量对应， 可以理解，当所述转换区域的数量为一个、两个或多个，且所述受激光对应也可以包括一种颜色的受激光(如设置黄色受激光材料产生的黄色受激光)、两种颜色的受激光(如设置红色与绿色受激光材料产生的红色与绿色受激光)或三种颜色的受激光(如设置红色、绿色及黄色受激光材料产生的红色、绿色及黄色受激光)时，所述滤光区域的数量也可以分别为一个、两个或三个，每个滤光区域对其中对应的一个转换区域发出的受激光进行过滤，用于滤除与接收到的受激光颜色不同的其他光，所述滤光区域对应也可以包括一种颜色的滤光材料(如用于过滤黄色受激光的黄色滤光材料)、两种颜色的滤光材料(如分别设置于两个过滤区域上的红色与绿色滤光材料)或三种颜色的滤光材料(如分别设置于三个过滤区域上的红色、绿色及黄色滤光材料)。
本实施方式中，所述散射装置210与所述波长转换装置207为一体结构，所述散射区域217及所述滤光区域218位于所述反射区域215及所述转换区域214的内侧。所述散射装置210与所述波长转换装置207同心设置且可以具有同一个位于圆心的驱动轴，用于带动所述散射装置210与所述波长转换装置207沿圆周方向转动。
所述光机系统230用于接收所述散射装置210出射的光并对所述散射装置210出射的光进行匀光及合光。所述光机系统230可以包括设置于显示设备(如投影设备)的空间光调制器前的光机方棒，其中所述空间光调制器用于依据图像数据调制所述光机方棒出射的光以产生显示图像所需的图像光。经所述第二中继透镜206c收集后的所述第一部分激发光进一步经所述散射区域217散射后被引导至所述光机系统230的入口，经所述第二中继透镜206c收集后的所述受激光进一步经所述滤光区域218过滤后被引导至所述光机系统230的入口。可以理解，基于以上波长转换装置207及散射装置210的结构可知，所述第一部分激发光及所述受激光是顺序被引导至所述光机系统230(即在不同时段被引导至所述匀光装置)，所述光机系统230对所述第一部分激发光及所述受激光是通过时分复用的方式合光。
所述光源系统200中，所述区域分光装置205控制所述激发光经由所述第一区域205a沿预定角度倾斜入射至所述反射区域215及所述转换区域214，所述反射区域215将所述第一部分激发光反射至所述第二区域205b，以使所述第二区域205b将所述第一部分激发光引导至出光通道216，由于经所述反射区域215反射后，所述第一部分激发光的光路相较于入射光路发生了偏移而光轴不重合，从而所述第一部分激发光从所述波长转换装置207返回至所述区域分光装置205的区域与所述激发光的入射区域(第一区域)是不同的，进而在不增加额外元件的情况下可以避免所述入射区域产生的损耗，提高所述光源系统200的光利用率以及避免现有技术区域镀膜处损失造成的出光不均。
进一步地，所述光源系统200中，所述激发光和所述受激光经过不同的光路，因此在所述收集系统206与所述波长转换装置207之间的距离发生离焦时，不仅会出现现有光源的光机方棒的出光亮度的下降，并且所述激发光与所述受激光由于光路不同，导致其亮度下降的幅度不同，所以还会造成合成的白光色坐标的变化。另外，所述激发光激发波所述波长转换装置207时光束沿所述预设角度倾斜入射，因此，因此在所述收集系统206a与所述波长转换装置207之间的距离发生离焦时，不仅是所述波长转换装置207表面光斑大小的变化，同时光斑的位置也会发生竖向的移动，导致此光斑在光机系统230的光机方棒入口所成像的位置也发生移动，进而使光机方棒的耦合效率降低，进一步降低光机方棒的出光亮度。
因此，针对以上问题，本发明光源系统200进一步设置了距离调节机构202，所述距离调节机构202可以邻近所述收集系统206a与所述波长转换装置207其中之一设置，用于调节所述收集系统206a与所述波长转换装置207之间的距离，通过所述收集系统206a与所述波长转换装置207之间的距离的变化，可使得所述光机系统230的出光亮度发生变化，最终使得所述光源系统200的光通量发生变化，使得所 述光机系统230的出光满足需求。其中，在一种实施例中，当所述光机系统230的出光亮度达到最大时，则所述收集系统206a与所述波长转换装置207之间的距离最佳，即所述距离调节机构202将所述收集系统206a与波长转换装置207之间的距离调节至所述光机系统230的出光亮度达到最大时所对应的距离，进而所述光源系统200的亮度更高且更满足使用者的需要，用户体验更好。
进一步地，由于所述收集系统206a与所述波长转换装置207之间的距离的变化可以影响所述述波长转换装置207的激发效率、所述收集系统206a的收集效率、以及所述光源系统200的光机方棒效率，通过设置所述距离调节机构202，可以通过调节所述收集系统206a与所述波长转换装置207之间的距离来调节所述波长转换装置207的激发效率、所述收集系统206a的收集效率、以及所述光源系统200的光机效率，从而调节所述光源系统200的出光亮度，使得所述光源系统200的效率较高。
请参阅图7，图7是本发明第二实施方式的光源系统200’的结构示意图。所述光源系统200’与第一实施方式的光源系统200的结构基本相同，也就是说，上述对所述光源系统200的描述基本上可以应用于所述光源系统200’，二者的差别主要在于：所述光机系统230的结构不同。具体地，所述距离调节机构202可以调节所述收集系统206a与所述波长转换装置207之间的距离来使得所述光机系统230发出的光的亮度变化，在一种具体实施例中，所述距离调节机构202调节所述收集系统206a与所述波长转换装置207之间的距离可改变所述光机系统出射的光的亮度及色坐标，因此，所述距离调节机构202可以作为所述光机系统230的亮度以及色坐标的调节机构。更进一步地，所述光源系统200’还包括光源控制器250，所述光源控制器250用于调制所述激发光源201发出的激发光的强度来调节所述光机系统230的光强度。
本实施方式中，所述光机系统230包括匀光装置211、第一光阑 231、第二光阑232、第三光阑233、中继透镜234、235，所述第一光阑231设置于所述匀光装置211的入口处，所述中继透镜234设置于所述匀光装置211及所述第二光阑232之间，所述中继透镜235设置于所述第二光阑232与所述第三光阑233之间。
所述第一光阑231放置在所述匀光装置211(如光机方棒)的入口位置，孔径与光机方棒入口尺寸相同，用于滤掉所述出光通道经由所述散射装置打在光机方棒入口外侧的杂散光。可以理解，当所述光源系统200或200’用于显示设备(如投影设备)时，所述光机系统230出射的光所在的光路上可以进一步设置所述显示设备的空间光调制器240，所述空间光调制器240用于依据待显示的图像数据调制所述光源系统200或200’发出的光以产生图像光，其可以包括DMD空间光调制器。
所述第二光阑232是所述光机系统230的孔径光阑，所述光机系统230中光束孔径大于光阑孔径的光线不会通过。所述第三光阑233放置在空间光调制器240的空间调制器的位置，其孔径尺寸与空间调制器的接收光的入光面的尺寸相同，即光斑尺寸大于空间调制器尺寸的光无法通过，藉此可以滤掉光源系统200’发出的光的overfill。可以理解，在所述第三光阑233处测试得到的光通量才是能够被实际空间光调制器240所利用的光通量。
采用本实施方式提供的光机系统230，可以与所述距离调节机构202构成光源亮度调节的机制，即通过所述距离调节机构202调节所述收集系统206a与所述波长转换装置207之间的距离，使得所述光机系统230出光的亮度发生变化，在一种实施例中，当所述光机系统230出光的亮度值达到最大时，则所述收集系统206a与波长转换装置207的距离最佳，即所述距离调节机构202将所述收集系统206a与波长转换装置207之间的距离调节至所述光机系统230的出光亮度达到最大时所对应的距离。
请进一步参阅图8，图8是图7所示光源系统200’的收集系统 206a与波长转换装置207之间的距离L的变化对所述光源系统200’的光通量(如所述光机系统230的出光的光通量)的影响曲线。具体来说，当所述距离L减小时，所述波长转换装置207表面激发光光斑变大，并且激发光光斑向下移动，所述光源系统200’的各光学效率变化如下。
对所述波长转换装置207激发效率来说：所述距离L减小时，所述激发光功率不变，但激发光光斑尺寸变大，所述波长转换装置207表面光功率减小，激发效率提高。
对所述收集系统206a的收集效率来说：所述距离L减小时，所述收集系统206a与激发光光斑距离拉近，收集效率提高。
对光机系统230(即光机方棒)耦合来说：所述距离L减小时，由于所述波长转换装置207表面激发光光斑的移动，导致其在所述光机系统230入口的成像的光斑(即所述出光通道经由所述散射装置210出射的激发光与受激光的光斑)位置移动，并被第一光阑231所滤掉，因此光机系统230(即光机方棒)的耦合效率会下降。
对光机效率(即所述光机系统230的效率)来说：所述距离L减小时，由于大角度的受激光被所述收集系统206a收集，因此在所述光机系统230(即光机方棒)入口光束以较大的角度汇聚，在经过所述光机系统230(即光机方棒)匀光的过程中，大角度的光线反射次数会有所增加，有反射率的损失，当光线经过第二光阑232，大角度的光线不会通过，光机效率较低。
相反地，当所述距离L增大时，所述波长转换装置207表面激发光光斑变大，并且激发光光斑光斑向上移动，光学效率变化如下。
对所述波长转换装置207激发效率来说：所述距离L增大时，激发光功率不变，激发光光斑尺寸变小，所述波长转换装置207表面光功率减大，激发效率降低。
对所述收集系统206a收集效率来说：所述距离L增大时，所述收集系统与所述激发光光斑距离拉远，收集效率降低。
对光机系统230(即光机方棒)耦合来说：所述距离L增大时，由于所述波长转换装置207表面光斑的移动，导致其在所述光机系统230入口的成像位置移动，并被所述第一光阑231所滤掉，因此所述光机系统230的耦合效率会下降。
对光机效率(即所述光机系统230的效率)来说：由于所述收集系统206a收集较小角度的光，因此在所述光机系统230(即光机方棒)入口光束以较小的角度汇聚，在经过所述光机系统230匀光的过程中，小角度的光线反射次数会有所减少，反射率的损失降低，当光线经过所述第二光阑232，小角度的光线全部通过，光机效率(即所述光机系统230的效率)有较小程度的提高。
综合以上各种光学效率，通过调整所述距离L的值，可从所述第三光阑233出光处测试出所述光机系统230(即所述光源系统200’)出光的光通量，其中所述光通量的归一化数据如图8所示。与现有的光源系统相比较，所述光源系统200’的光通量可允许的范围为98％以上时，所述距离L的容差要控制在0.05mm以内。
另外，激发光和受激光经过不同的光路，所述距离L发生变化时，不仅会出现现有光源系统的出光亮度的下降，并且激发光和受激光亮度下降的幅度不同，所以还会造成合成的白光色坐标的变化。请参阅图9，图9是图7所示光源系统200’的收集系统206a与波长转换装置207之间的距离变化对所述光源系统200’的色坐标的影响曲线。从图9可以看出，通过调节所述距离L的值，从所述第三光阑233出光处测试的所述光源系统200’发出的白光的色坐标会发生变化，即当所述收集系统206a与所述波长转换装置207之间的距离L发生变化时，从所述光机系统230出射的光的亮度和色坐标均发生变化，其中所述距离L的值与色坐标变化的曲线如图9所示。具体地，色坐标(x，y)包括x值与y值，图9中的曲线CIE-x为色坐标x值与距离L的变化曲线，曲线CIE-y为色坐标y值与距离L的变化曲线。
进一步地，根据图8与图9曲线可以看出，本发明光源系统200’ 中，对所述收集系统206a与所述波长转换装置207之间的距离的要求比现有光源系统高，但利用上述实施方式中的距离调节机构202与光机系统230可以调节使得所述光源系统200’出光亮度最高，使得光源系统200’的光效达到最大。
更进一步地，根据上述实施方式描述，由于所述收集系统206a与波长转换装置207的间距不仅影响光源系统200’出光的光通量，而且影响其出光(即激发光与受激光合光之后的白光)的色坐标，因此可以利用上述距离调节机构202与光机系统230，实现一种高一致性的动态光源。
具体地，由于激发光与受激光光路分开，受激光效率的变化幅度相同，在合光时，将所有受激光看作是一种黄色受激光，色坐标为(xY，yY)，亮度为LY，蓝色激发光色坐标为(xB，yB)，亮度为LB，并且LY远大于LB。假设合光后白光色坐标为(x，y)，亮度为L，根据色度学理论，可以得到白光色坐标(x，y)及亮度L符合如下公式：
Figure PCTCN2017096514-appb-000001
Figure PCTCN2017096514-appb-000002
L＝LY+LB
当所述收集系统206a与所述波长转换装置207距离拉远时，受激光的效率下降幅度相对于蓝色激发光更大，因此LB相对值增大，合成白光时色坐标的x和y值都会减小，在色域图上色坐标往左下漂移，此时受激光的下降幅度大也导致了白光亮度下降趋势更大；当所述收集系统206a与所述波长转换装置207之间的距离L拉近时，蓝色激发光的效率下降幅度相对于受激光更大，因此LY相对值增大，合成白光时色坐标的x和y值都会增大，在色域图上色坐标往右上漂移。
在光源系统200’中，由于光学器件镀膜以及加工时的差异，使得不同光源系统200’的透过率光谱不同，进而导致光源系统200’出 光的色坐标有所差异。在这种新型光源系统200’中，刚好可以利用上述色坐标可变的原理进行光源系统200’一致性的调节。例如，第一及第二两台光源系统200’，第一光源系统200’色坐标和亮度为0.279，0.288，8000lm，第一光源系统200’色坐标和亮度为0.281，0.292，8500lm，为了使光源系统200’出光色温更高以及光源系统200’颜色亮度一致，调节第二光源系统200’，将其收集系统与波长转换装置距离拉远0.05mm左右，白光色坐标往左下漂移，直到其色坐标与第一光源系统200’相同，两台光源系统200’的颜色达到一致性。在第二光源系统200’调节的过程中，其亮度也会有所损失，根据上述数据，第二光源系统200’调节后亮度为8300lm左右，此时两台光源系统200’亮度不一致，第二光源系统200’亮度高于第一光源系统200’，可以通过第二光源系统200’的光源控制器250降低第二光源系统200’的激发光源的电流可以使得其出光亮度与第一光源系统200’达到一致。最终两台光源系统200’的颜色及亮度都达到一致，因此所述光源系统200’特别适用于对出光一致性要求非常高的照明及投影系统，如拼墙。
进一步地，为实现精准调节所述光机系统230出射的光的亮度及色坐标的目的，本实施方式中，所述光源系统200’还包括检测机构260，所述检测机构260可以为亮度及颜色检测机构，用于检测所述光源系统200’发出的光的亮度及色坐标，如检测所述光机系统230出射的受激光和激发光的混合光的色坐标和亮度。其中所述检测机构260可以设置于在所述光源系统200’的出光处(如所述光机系统230的出光处)。所述距离调节机构202用于配合所述检测机构检测的信息调节所述收集系统206a与波长转换装置207之间的距离，使得所述光机系统230出射的光的亮度和/或色坐标满足预设条件。
在一种实施例中，所述检测机构260检测所述光机系统230出射的受激光、所述激发光或所述受激光和激发光的混合光的亮度，所述距离调节机构202将所述收集系统206a与波长转换装置207之间的距 离调节至所述检测机构260所能够检测到的最大亮度所对应的距离。即，所述预设条件为所述检测机构260所能够检测到的最大亮度或者说是所述光机系统230的出射的光达到最大亮度。
具体来说，当所述光机系统230出光的亮度达到最大时，所述检测机构260检测到的光的亮度达到最大亮度，所述收集系统206a与波长转换装置207的距离最佳，即所述距离调节机构202将所述收集系统206a与波长转换装置207之间的距离调节至所述光机系统230的出光亮度达到最大时所对应的距离，使得所述检测机构260检测到的出光达到最大亮度，即所述光机系统230的出光达到最大亮度。
在另一种实施例中，所述距离调节机构202还基于所述检测机构260检测到的所述光机系统230的发出的光的亮度及色坐标来调节所述波长转换装置207与所述收集系统206a之间的距离。所述检测机构260可以检测所述光机系统230出射的受激光和激发光的混合光的色坐标和亮度。所述距离调节机构202依据所述检测机构260检测到的色坐标调节所述收集系统206a与波长转换装置207之间的距离，以使得所述检测机构260检测到的色坐标达到目标色坐标。
具体地，请参阅与图10，当所述检测机构260检测到的色坐标(即当前色坐标)大于目标色坐标，所述距离调节机构202将所述波长转换装置207与所述收集系统206a之间的距离调小；当所述检测机构260检测到的色坐标小于目标色坐标，所述距离调节机构202将所述波长转换装置207与所述收集系统206a之间的距离L调大。当所述检测机构260检测到的色坐标等于目标色坐标，所述距离调节机构202维持所述波长转换装置207与所述收集系统206a之间的距离L不变。其中，可以理解，所述目标色坐标可以通过输入装置(如键盘、触摸屏、OSD按键等)输入至所述光源系统200’或者使用所述光源系统200’的显示设备，使得所述光源系统200’或者使用所述光源系统200’的显示设备可以获悉所述目标色坐标并执行上述比较色坐标与目标色坐标的步骤，并依据比较结果控制所述距离调节机构202对所 述距离L进行调节，使得所述光源系统200’出光的实际色坐标可以达到所述目标色坐标。具体地，所述检测机构260可以输出所述当前色坐标的信号至所述距离调节机构202，所述距离调节机构202可以包括信号处理单元与调节单元，所述信号处理单元用于将所述当前色坐标与所述目标色坐标进行比较，并依据比较结果输出控制信号控制所述调节单元调节所述距离L。
进一步地，本实施例中，所述光源控制器250可以依据所述检测机构260检测到的亮度调节所述激发光源发出的激发光强度，以使得所述检测机构260检测到的亮度达到目标亮度。具体地，所述光源控制器250基于所述检测机构260检测到的所述光源系统200’的发出的光的亮度及色坐标来调制所述激发光的强度。请参阅与图10，当所述检测机构260检测到的所述光机系统230出射的光的亮度(即当前亮度)大于目标亮度，所述光源控制器250将所述激发光源201的驱动电流降低，从而所述激发光的强度降低。当所述检测机构260检测到的所述光机系统230出射的光的亮度小于目标亮度，所述光源控制器250将所述激发光源201的驱动电流提高，所述激发光的强度增加。当所述检测机构260检测到的当前亮度等于目标亮度，所述光源控制器250维持所述激发光源201的驱动电流不变，进而所述激发光的强度保持不变。其中，可以理解，所述目标亮度也可以通过输入装置(如键盘、触摸屏、OSD按键等)输入至所述光源系统200’或者使用所述光源系统200’的显示设备，使得所述光源系统200’或者使用所述光源系统200’的显示设备可以获悉所述目标亮度并执行上述比较当前亮度与目标亮度的步骤，所述光源控制器250可以依据比较结果对所述激发光源201的驱动电流进行调节，从而通过调节所述激发光的强度来调节所述光源系统200’的光通量。
可以理解，所述光源系统200’的色坐标的比较调节步骤可以在所述亮度比较调节的步骤之前，也就是说，所述检测机构260检测到所述色坐标及亮度值之后，所述光源系统200’的距离调节机构202 先比较所述色坐标与目标色坐标，并依据比较结果控制调节所述色坐标为目标色坐标后，所述光源系统200’再比较所述亮度与目标亮度，并依据比较结果控制调节所述亮度为目标亮度。
进一步地，当两个或以上数量的所述光源系统200’及具有所述光源系统200’的显示设备用于拼墙显示等环境时，需要将所述两个或以上数量的所述光源系统200’的色坐标及亮度调节一致时，可以将目标色坐标及目标亮度输入到各个光源系统200’中，各个光源系统200’通过其距离调节机构202与光源控制器250来调节其自身的色坐标及亮度达到所述目标色坐标及目标亮度。其中，可以理解，由于所述各个光源系统200’的亮度可能不同，为了保证各个光源系统200’经调节后的亮度一致，可以事先确定当前的各个光源系统200’中的多个亮度中的最小值，并将所述最小值作为所述目标亮度，从而可将所述各个光源系统200’均调整所述最小值，从而使用用于拼墙等环境的两个或以上数量的所述光源系统200’及具有所述光源系统200’的显示设备的亮度一致。
请参阅图11，图11是本发明第三实施方式的光源系统300的结构示意图。所述光源系统300与第二实施方式的光源系统200’的结构基本相同，也就是说，上述对所述光源系统200’的描述基本上可以应用于所述光源系统300，二者的差别主要在于：区域分光装置305有所不同。具体地，本实施方式中，所述区域分光装置305的反射镜305d的反射表面为曲面，如凹面。所述反射镜305d的凹面的反射表面接收波长转换装置307经由收集系统306a发出的第一部分激发光，并将所述第一部分激发光反射至出光通道316。分光片305c还接收经所述反射镜透射的部分所述受激光，并将所述部分受激光反射至出光通道316。
请参阅图12，图12是本发明第四实施方式的光源系统400的结构示意图。所述光源系统400与第二实施方式的光源系统200’的结构基本相同，也就是说，上述对所述光源系统200’的描述基本上可 以应用于所述光源系统400，二者的差别主要在于：区域分光装置405有所不同。具体地，本实施方式中，所述区域分光装置405的反射镜405d的反射表面为曲面，如凸面，且所述反射镜405d设置于分光片405c远离波长转换装置407的一侧。所述反射镜405d的凸面的反射表面接收经所述分光片透射的第一部分激发光，并将所述第一部分激发光反射至出光通道416。分光片405c接收所述波长转换装置407经由收集系统406a发出的受激光，并将所述受激光反射至出光通道416。
请参阅图13及图14，图13是本发明第五实施方式的光源系统500的结构示意图，图14是图13所示光源系统500的区域分光装置的结构示意图。所述光源系统500与第二实施方式的光源系统200’的结构基本相同，也就是说，上述对所述光源系统200’的描述基本上可以应用于所述光源系统500，二者的差别主要在于：区域分光装置505与引导装置512均有所不同。具体地，本实施方式中，区域分光装置505包括分光片505c，所述分光片505c与第一实施方式中的分光片505c基本相同，第一区域505a透射激发光源501发出的激发光，第二区域505b反射受激光与第一部分激发光，此处就不再赘述其结构原理，所述引导装置512包括分光片508及反射镜509，所述分光片508接收区域分光装置505经由第一出光通道516a出射的所述受激光并将所述受激光反射至第二出光通道516b，所述反射镜509接收所述区域分光装置505经由所述第一出光通道516a出射的所述第一部分激发光并将所述第一部分激发光反射至所述第二出光通道516b。
本实施方式中，所述反射镜509也为曲面反射镜，其反射表面为曲面，如凸面，所述分光片508将所述第一出光通道516a中的所述第一部分激发光透射至所述反射镜509，所述反射镜509将所述第一部分激发光反射且所述第一部分激发光经由所述分光片透射至所述第二出光通道516b。
请参阅图15，图15是本发明第六实施方式的光源系统600的结构示意图。所述光源系统600与第五实施方式的光源系统500的结构 基本相同，也就是说，上述对所述光源系统500的描述基本上可以应用于所述光源系统600，二者的差别主要在于：引导装置612的反射镜609有所不同。具体地，本实施方式中，引导装置612的反射镜609的反射表面也为曲面，但是为凹面，所述反射镜609的位置也与第六实施方式中稍有不同。第一出光通道616a中的至少部分所述受激光经由所述反射镜609透射至所述分光片608，所述分光片608将所述至少部分所述受激光经由所述反射镜609透射至所述第二出光通道616b。
请参阅图16，图16是本发明第七实施方式的光源系统700的结构示意图。所述光源系统700与第二实施方式的光源系统200’的结构基本相同，也就是说，上述对所述光源系统200’的描述基本上可以应用于所述光源系统700，二者的差别主要在于：波长转换装置707、中继系统的区域分光装置705、散射装置710的结构不同，从而出光通道716也稍有不同。
具体地，所述区域分光装置705包括分光片705c及反射镜705d，所述分光片705c对应第一区域设置，所述反射镜705d对应第二区域设置，所述第一区域的分光片705c的第一表面接收所述激发光并将所述激发光反射至所述波长转换装置707，所述波长转换装置707将所述第一部分激发光反射至所述第二区域的反射镜705d，所述反射镜705d将所述第一部分激发光反射至所述第一区域的分光片705c的与所述第一表面相背的第二表面，所述第一区域的分光片705c的第二表面将所述第一部分激发光反射至所述出光通道716，所述波长转换装置707还将受激光反射至所述出光通道716。进一步地，所述反射镜705d也为曲面反射镜，其为反射表面为凸面的反射镜。
所述散射装置710与所述波长转换装置707是分体设置的两个独立元件，所述散射装置710用于接收所述出光通道716的光并将散射后光提供至光机系统730的入口，中继透镜706c用于对所述出光通道716的光进行收集以使所述出光通道716的光经由所述散射装置710成像到所述光机系统730的入口。
以下对以上各实施方式采用曲面反射镜的原理及有益效果进行介绍。
具体来说，如第一实施方式所示，使用平面的反射镜209时，由于所述激发光波长小于所述受激光，其光程较短，同时相对来说，所述受激光的在光源系统200中走的光路较长，这样会使激发光汇聚于所述光机系统230(如光机方棒)入口之前，在所述光机系统230入口的激发光光斑是一个离焦的像，会给所述光源系统200的耦合效率及均匀性带来影响。
而第三、第四、第五、第六及第七实施方式中，所述曲面的反射镜305d、405d、509、609、705d的作用与透镜类似，参与成像，可以汇聚或发散光线。如图17(A)(B)所示，所述凹面的反射镜305d、609可以汇聚反射光的角度，与凸透镜的作用相同；如图17(C)(D)所示，所述凸面的反射镜405d、509、705d可以发散反射光的角度，与凹透镜的作用相同。由于所述激发光与所述受激光的光路不同，可以使用曲面反射镜305d、405d、509、609、705d可以拉近或拉远所述激发光的光程，使所述激发光与受激光均在所述匀光装置入口汇聚，有利于提高颜色均匀性。
具体来说，如在光源系统的光路设计中，如图12、13、16，所述激发光走的光程相对于所述受激光的光程较长，而所述激发光经过凸面反射镜时，反射后的激发光发散，使得成像过程中光程拉远，进而最终在所述匀光装置入口进行汇聚。相对地，如在光源系统的光路设计中，如图14、15，所述激发光走的光程相对于红绿光的光程较短，而光束经过凹面反射镜时，反射光束汇聚，使得成像过程中光程拉近。
由于所述激发光光程相对与受激光的光程的差异不会很大，因此需要的曲率很小。特别地，在图15中，激发光波长较短，其光程本身就相对于受激光短，所以此处的凹面镜所需要的曲率会比较小。曲率区别于激发光与受激光光程差值的大小，差得越大需要的曲率就越大，由于反射镜是成像的一个中间器件，其曲率是可以进行软件模拟优化 的，曲率半径范围大致在50～500之间(曲率＝1/曲率半径)。
本实用新型还提供一种显示设备，所述显示设备可以应用于投影机、LCD(Liquid Crystal Display，液晶显示器)显示等，所述显示设备可以包括光源系统、空间光调制器及投影镜头，所述光源系统采用上述实施方式中的光源装置200、200’、300、400、500、600、700。所述空间光调制器用于依据所述光源系统发出的光及输入图像数据调制图像而输出图像光，所述投影镜头用于依据所述图像光进行投影而显示投影图像。采用上述光源装置200、200’、300、400、500、600、700的显示设备的光利用率较高，图像的颜色均匀性较好。
另外，可以理解，本发明光源装置200、200’、300、400、500、600、700还可以用于舞台灯系统、车载照明系统及手术照明系统等，并不限于上述的显示设备。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种光源系统，其特征在于，包括激发光源、收集系统、波长转换装置、中继系统、光机系统、检测机构和距离调节机构，其中：
    所述激发光源用于发出激发光；
    所述收集系统设置于所述激发光源及所述波长转换装置之间；所述激发光经所述收集系统收集后照射至所述波长转换装置；
    所述波长转换装置包括转换区域和反射区域，所述波长转换装置周期性运动，使得所述转换区域和反射区域分时地周期性位于所述激发光的光路上；所述转换区域用于将所述激发光转换为受激光并出射，所述反射区域用于将所述激发光反射后出射；从所述波长转换装置出射的所述受激光和激发光位于所述波长转换装置的同一侧但光轴不重合；
    所述收集系统还用于收集从所述波长转换装置出射的所述受激光及激发光；
    所述中继系统用于将所述收集的受激光及激发光引导至所述光机系统，并使得所述受激光及激发光的光轴在预设误差范围内大致重合地进入所述光机系统；
    所述光机系统，用于将所述受激光和所述激发光进行匀光以及提供至用于调制图像光的空间光调制器；
    当所述收集系统与所述波长转换装置之间的距离发生变化时，从所述光机系统出射的光的亮度和色坐标发生变化；
    所述检测机构用于检测所述光机系统出射的光的亮度和/或色坐标信息；
    所述距离调节机构用于配合所述检测机构检测的信息而调节所述收集系统与波长转换装置之间的距离，使得所述光机系统出射的光的亮度和/或色坐标满足预设条件。
  2. 如权利要求1所述的光源系统，其特征在于：
    所述检测机构用于检测所述光机系统出射的受激光、所述激发光 或所述受激光和激发光的混合光的亮度；
    所述距离调节机构将所述收集系统与波长转换装置之间的距离调节至所述检测机构所检测到的最大亮度所对应的距离。
  3. 如权利要求1所述的光源系统，其特征在于：
    所述检测机构用于检测所述光机系统出射的受激光和激发光的混合光的色坐标和亮度；
    所述距离调节机构还用于依据所述检测机构检测到的色坐标调节所述收集系统与波长转换装置之间的距离，以使得所述检测机构检测到的色坐标达到目标色坐标；
    所述光源系统还包括：
    光源控制器，用于依据所述检测机构检测到的亮度调节所述激发光源发出的激发光强度，以使得所述检测机构检测到的亮度达到目标亮度。
  4. 如权利要求3所述的光源系统，其特征在于：当所述检测机构检测到的色坐标大于目标色坐标，所述距离调节机构将所述波长转换装置与所述收集系统之间的距离调小；当所述检测机构检测到的色坐标小于目标色坐标，所述距离调节机构将所述波长转换装置与所述收集系统之间的距离调大。
  5. 如权利要求3所述的光源系统，其特征在于：当所述检测机构检测到的亮度大于目标亮度，所述光源控制器将所述激发光源的驱动电流降低；当所述检测机构检测到的亮度小于目标亮度，所述光源控制器将所述激发光源的驱动电流提高。
  6. 如权利要求1所述的光源系统，其特征在于：所述光机系统包括匀光装置、第一光阑、第二光阑、第三光阑、第一中继透镜、及第二中继透镜，所述第一光阑设置于所述匀光装置的入口处，所述中继系统发出的受激光及激发光经由所述第一光阑入射至所述匀光装置，所述第一中继透镜设置于所述匀光装置及所述第二光阑之间，所述第二中继透镜设置于所述第二光阑与所述第三光阑之间。
  7. 如权利要求1所述的光源系统，其特征在于：所述中继系统包括区域分光装置，所述区域分光装置位于所述收集系统与所述激发光源之间，所述区域分光装置包括第一区域与第二区域：
    所述区域分光装置的第一区域将所述激发光源发出的激发光引导至所述收集系统，使得所述激发光经所述收集系统收集后被引导至所述波长转换装置，所述激发光包括入射到所述反射区域的第一部分激发光及入射到所述转换区域的第二部分激发光，所述第一部分激发光与所述第二部分激发光时分时且周期性地入射至所述反射区域所述转换区域，
    所述反射区域将所述第一部分激发光反射至所述收集系统，且所述第一部分激发光经由所述收集系统收集后被引导所述区域分光装置的第二区域，所述区域分光装置的第二区域用于将所述第一部分激发光引导至出光通道；
    所述转换区域将所述第二部分激发光转换为受激光并将所述受激光反射至所述收集系统，所述收集系统对所述受激光进行收集，所述被收集后的受激光还被引导至所述出光通道。
  8. 如权利要求7所述的光源系统，其特征在于：其中所述激发光沿预定角度倾斜入射至所述反射区域，使得所述波长转换装置出射的所述受激光和激发光的光轴不重合。
  9. 如权利要求7所述的光源系统，其特征在于：所述中继系统还包括引导装置，所述出光通道包括第一出光通道及第二出光通道，所述区域分光装置将所述波长转换装置发出的光经由所述第一出光通道引导至所述引导装置，所述引导装置将所述第一出光通道中的光引导至所述第二出光通道。
  10. 如权利要求9所述的光源系统，其特征在于：所述中继系统包括分光片及反射镜，所述分光片接收所述区域分光装置经由所述第一出光通道出射的所述受激光并将所述受激光反射至所述第二出光通道，所述反射镜接收所述区域分光装置经由所述第一出光通道出射的所述 第一部分激发光并将所述第一部分激发光反射至所述第二出光通道。
  11. 如权利要求10所述的光源系统，其特征在于：所述反射镜的反射表面为凸面，所述分光片将所述第一出光通道中的所述第一部分激发光透射至所述反射镜，所述反射镜将所述第一部分激发光反射且所述第一部分激发光经由所述分光片透射至所述第二出光通道。
  12. 如权利要求10所述的光源系统，其特征在于：所述反射镜的反射表面为凹面，所述第一出光通道中的至少部分所述受激光经由所述反射镜透射至所述分光片，所述分光片将所述至少部分所述受激光经由所述反射镜透射至所述第二出光通道。
  13. 如权利要求7所述的光源系统，其特征在于：所述中继系统还包括散射装置，所述散射装置用于接收所述出光通道的光并对所述出光通道出射的光进行散射，所述散射后的光被引导至所述光机系统。
  14. 如权利要求13所述的光源系统，其特征在于：所述散射装置包括散射区域与滤光区域，所述散射区域用于对所述出光通道出射的激发光进行散射，所述滤光区域用于对所述出光通道出射的所述受激光进行过滤，所述散射区域与所述滤光区域沿圆周方向设置；所述散射装置与所述波长转换装置为一体结构，所述散射区域及所述滤光区域位于所述反射区域及所述转换区域的内侧。
  15. 如权利要求7所述的光源系统，其特征在于：所述区域分光装置包括分光片及反射镜，所述分光片对应所述第一区域设置，所述反射镜对应所述第二区域设置，所述第一区域的分光片的第一表面接收所述激发光并将所述激发光反射至所述波长转换装置，所述波长转换装置将所述第一部分激发光反射至所述第二区域的反射镜，所述反射镜将所述第一部分激发光反射至所述第一区域的分光片的与所述第一表面相背的第二表面，所述第一区域的分光片的第二表面将所述第一部分激发光反射至所述出光通道，所述波长转换装置还将所述受激光反射至所述出光通道。
  16. 如权利要求15所述的光源系统，其特征在于：所述反射镜的 反射表面为凸面。
  17. 如权利要求7所述的光源系统，其特征在于：所述区域分光装置还包括位于所述第一区域与所述第二区域外围的第三区域，所述区域分光装置包括分光片及反射镜，所述分光片对应所述第一区域、第二区域及第三区域设置，所述反射镜对应所述第二区域设置，所述第一区域处的部分分光片接收所述激发光并将所述激发光透射至所述波长转换装置，所述波长转换装置将所述第一部分激发光反射至所述反射镜，所述第二区域的反射镜将所述第一部分激发光反射至所述出光通道，所述分光片还将所述受激光反射至所述出光通道。
  18. 如权利要求17所述的光源系统，其特征在于：所述反射镜的反射表面为凸面，所述波长转换装置将所述第一部分激发光经由所述分光片反射至所述反射镜，所述反射镜反射的所述第一部分激发光经由所述分光片进入所述出光通道。
  19. 如权利要求17所述的光源系统，其特征在于：所述反射镜的反射表面为凹面，至少部分的所述受激光经所述反射镜透射至所述分光片，以使所述分光片将所述波长转换装置发出的受激光反射至所述出光通道。
  20. 一种显示设备，所述显示设备包括光源系统，其特征在于：所述光源系统采用权利要求1-19项任意一项所述的光源系统。
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