WO2020108338A1 - 光源系统及投影系统 - Google Patents

光源系统及投影系统 Download PDF

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Publication number
WO2020108338A1
WO2020108338A1 PCT/CN2019/119139 CN2019119139W WO2020108338A1 WO 2020108338 A1 WO2020108338 A1 WO 2020108338A1 CN 2019119139 W CN2019119139 W CN 2019119139W WO 2020108338 A1 WO2020108338 A1 WO 2020108338A1
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WIPO (PCT)
Prior art keywords
excitation light
light
fluorescence
light source
section
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Ceased
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PCT/CN2019/119139
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English (en)
French (fr)
Inventor
郭祖强
鲁宁
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • 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
    • G03B21/2013—Plural 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

Definitions

  • the invention relates to projection display technology, in particular to a light source system and a projection system with the light source system.
  • the laser fluorescent hybrid light source is widely used in various projection equipments due to its advantages of long life, low cost and high brightness, and has very good display effects.
  • the color wheels commonly used in projection equipment are reflective color wheels.
  • the blue laser emitted by the laser first excites the phosphor powder to generate fluorescence through the fluorescent wheel, then filters the color wheel to enter the spatial light modulator, and finally the lens Projection produces a projected image. Since the blue laser light remaining in the fluorescent light has a great influence on the fluorescent color coordinates and affects the projection display effect, a dual-color wheel scheme of a fluorescent wheel and a filter wheel is usually required.
  • the two-color wheel solution will undoubtedly increase the volume of the color wheel, which is not conducive to the miniaturization of the product.
  • the color of red fluorescence produced by the excitation of red phosphors is usually impure, resulting in poor display of red.
  • An embodiment of the present invention provides a light source system, including: a first excitation light source, a second excitation light source, a first spectroscopic device, a color wheel, and a second spectroscopic device, wherein: the first excitation light source is used to emit first excitation light The second excitation light source is used to emit second excitation light; the first beam splitting device is used to guide the first excitation light emitted by the first excitation light source to the color wheel;
  • the color wheel includes at least a first section and a second section, the first section and the second section are arranged in time series on the propagation of the first excitation light guided by the first spectroscopic device
  • the second section is used to convert the first excitation light into first fluorescence
  • the first fluorescence propagates along the first optical channel
  • the second section is also used to convert the first
  • the second excitation light is guided to the second optical channel for propagation
  • the first section is used to guide the first excitation light to the second optical channel for propagation
  • the first spectroscopic device is disposed in the first optical channel
  • it is also used to guide the first fluorescence to the second spectroscopic device and remove the first excitation light mixed in the first fluorescence
  • the second spectroscopic device is disposed in the first optical channel and the At the intersection of the second optical channels, the first fluorescent light propagating along the first optical channel and the first excitation light and the second excitation light propagating along the second optical channel Merged into the same light path.
  • An embodiment of the present invention also provides a projection system including the light source system described above.
  • the color wheel is not provided with a filter structure, but the first spectroscopic device is used to reflect and eliminate the first excitation light mixed in the fluorescence to avoid the first excitation light affecting the fluorescence color coordinates, Omitting the filter structure is beneficial to reduce the size of the color wheel, thereby reducing the volume of the entire projection system; further, by adding a second excitation light source to emit second excitation light, the second excitation light and the first Fluorescence is combined by the second spectroscopic device, so that the second excitation light utilization rate is high and the red or green light display effect is improved, thereby improving the color of the first fluorescence/second fluorescence generated due to the excitation of the phosphor is usually not It is pure, and there is no problem that the color wheel does not have a filter region that modifies the first fluorescence/second fluorescence, resulting in a poor display effect.
  • FIG. 1 is a schematic structural diagram of a light source system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of the light source system shown in FIG. 1 in another state.
  • FIG. 3 is a schematic plan view of the color wheel of the light source system in FIG. 1.
  • FIG. 4 is a schematic cross-sectional view of the color wheel of the light source system shown in FIG. 3 along IV-IV.
  • FIG. 5 is a schematic cross-sectional view of the color wheel shown in FIG. 3 along V-V.
  • FIG. 6 is a schematic plan view of the second light splitting device of the light source system shown in FIG. 1.
  • FIG. 7 is a schematic structural diagram of a light source system according to a second embodiment of the present invention.
  • FIG. 8 is a schematic plan view of the color wheel of the light source system shown in FIG. 7.
  • FIG. 9 is a schematic cross-sectional view of the color wheel shown in FIG. 8 taken along VIVIII-VIIII.
  • Second excitation light source 10 First excitation light source 10a Second excitation light source 10b Third excitation light source 10c First beam splitter 20 Color wheel 30, 30’ Color wheel 31 Drive 32 First collimating device 40 First reflecting device 50 First convergence device 60 Second beam splitter 70, 70’ First area 71 Second area 72 Second convergence device 80 Second reflection device 90 First uniform light device 100 Second collimating device 101 Second uniform light device 110
  • Third convergence device 120 Light collection device 130 Third beam splitter 140 Color wheel substrate 310 First section 311 Second section 312 Third section 313 First surface 3101 Second surface 3102 First phosphor layer 3121 Second slope 3122 Second phosphor layer 3131 Third slope 3132
  • FIGS. 1 and 2 are schematic structural views of a light source system 1 according to a first embodiment of the present invention.
  • the light source system 1 includes a first excitation light source 10a, a second excitation light source 10b, a first beam splitting device 20, a color wheel 30, a first collimating device 40, a first reflecting device 50, a first concentrating device 60, and a second beam splitting The device 70, the second converging device 80, the second reflecting device 90, and the first light homogenizing device 100.
  • the first excitation light source 10a is used to emit first excitation light.
  • the first excitation light may be a blue laser, but it is not limited thereto.
  • the first excitation light source 10a may be a semiconductor diode or a semiconductor diode array, such as a laser diode (LD) or a light emitting diode (LED).
  • LD laser diode
  • LED light emitting diode
  • the first spectroscopic device 20 is disposed on the propagation path of the first excitation light emitted by the first excitation light source 10a.
  • the first spectroscopic device 20 is used to guide the first excitation light emitted by the first excitation light source 10a to the color wheel 30.
  • the first excitation light source 10 a is located to the left of the first spectroscopic device 20, and the first spectroscopic device 20 reflects the first excitation light to The color wheel 30.
  • a second light homogenizing device 110 and a third converging device 120 may be further provided between the first excitation light source 10a and the first beam splitting device 20.
  • the second light homogenizing device 110 is used to homogenize the first excitation light emitted by the first excitation light source 10a and then emit it to the third concentrating device 120.
  • the third concentrating device 120 is used to condense the first excitation light emitted by the second light homogenizing device 110 and then emit the first excitation light to the first spectroscopic device 20.
  • the second uniform light device 110 may be a diffuser, a single compound eye, a double compound eye, a square bar, etc., but it is not limited to the above. After passing through the second uniform light device 110 and the third converging device 120, the spot size of the first excitation light increases, and the maximum power density decreases.
  • the second excitation light source 10b is used to emit second excitation light.
  • the second excitation light may be a red laser, but not limited to this.
  • the first excitation light source 10a and the second excitation light source 10b are located on both sides of the color wheel 30, respectively, and the emission direction of the second excitation light is substantially perpendicular to the first excitation light source 10a.
  • the second excitation light source 10 may be a semiconductor diode or a semiconductor diode array, such as a laser diode (LD) or a light emitting diode (LED).
  • LD laser diode
  • LED light emitting diode
  • the color wheel 30 includes a color wheel plate 31 and a driving device 32.
  • the driving device 32 is used to drive the color wheel plate 31 to rotate.
  • the driving device 32 may be a motor.
  • the color wheel plate 31 is used to receive the first excitation light emitted from the first spectroscopic device 20 and the second excitation light emitted from the second excitation light source 10b.
  • the color wheel plate 31 includes a color wheel substrate 310 and a first section 311, a second section 312 and a third section 313 disposed along the edge of the color wheel 30.
  • the first section 311, the second section 312, and the third section 313 are sequentially arranged on the propagation path of the first excitation light guided by the first beam splitter 20.
  • the color wheel substrate 310 includes a first surface 3101 facing the first spectroscopic device 20 and a second surface 3102 facing the second excitation light source 10b, the first surface 3101 and the second surface 3102 Relative settings.
  • the first section 311 is a first inclined surface that is inclined toward the first spectroscopic device 20 and is inclined compared to the first surface 3101.
  • the first inclined surface can be oriented toward the plane where the first surface 3101 is located
  • the second surface 3012 is formed by rotating 45 degrees (that is, the inclined angle of the first inclined surface compared to the first surface 3101 is 45 degrees).
  • the first inclined plane is used to reflect the first excitation light emitted from the first beam splitter 20 to the second optical channel for propagation, specifically, the first inclined plane is a reflection and scattering layer, so that the first excitation The speckle phenomenon of light is weakened.
  • the second section 312 includes a first phosphor layer 3121 formed on the first surface 3101 and a second inclined surface disposed toward the second excitation light source 10b and inclined relative to the second surface 3102 3122, the second inclined surface 3122 may be formed by rotating the plane where the second surface 3102 is located 45 degrees toward the first surface 3101 (ie, the angle of the second inclined surface 3122 inclined with respect to the second surface 3102 is 45 degree).
  • the first phosphor layer 3121 is used to convert the first excitation light emitted by the first spectroscopic device 20 into first fluorescence and reflect the first fluorescence to the first optical channel for propagation
  • the second slope 3122 is used to reflect the second excitation light emitted from the second excitation light source 10b to the second light channel for propagation.
  • the second excitation light source 10b emits the second excitation light when the second section 312 is located on the propagation path of the first excitation light.
  • the inclination angle of the first inclined surface and the second inclined surface is not limited to 45 degrees, but may also be 40 degrees, 30 degrees, etc. The angle may be set according to the path required for the reflected light to travel.
  • the third section 313 includes a second phosphor layer 3131 formed on the first surface 3101, and the second phosphor layer 3131 is used to convert the first excitation light emitted by the first spectroscopic device 20 It is the second fluorescence and reflects the second fluorescence to the first optical channel for propagation.
  • the first optical channel is a path for the first fluorescence and the second fluorescence to propagate after exiting from the color wheel 30.
  • the second light channel is a path through which the first excitation light and the second excitation light travel from the color wheel 30 to travel.
  • the first phosphor layer 3121 includes red phosphor, that is, the first phosphor is red phosphor; the second phosphor layer 3131 includes green phosphor, that is, the second phosphor It is green fluorescent. Therefore, different sections sequentially receive the first excitation light as the color wheel 30 rotates and generate time-series three primary color lights.
  • the second section 312 and the third section 313, in addition to the corresponding color phosphors, may also include an adhesive for encapsulating the phosphor, the adhesive may be resin, Silica gel, water glass, glass or ceramics, etc.; where glass or ceramics are used as the packaging material of the phosphor, the color wheel 30 is also called fluorescent glass or fluorescent ceramics.
  • the ceramic material may be selected from at least one of aluminum oxide, aluminum oxynitride, and magnesium aluminum spinel.
  • the color wheel 30 and the first spectroscopic device 20 may further be provided with a light collection device 130 for collecting the first fluorescence and the second fluorescence emitted by the color wheel 30 The fluorescent light is emitted to the first spectroscopic device 20.
  • the third section 313 may be omitted, that is, green fluorescence may not be generated by the second phosphor layer 3131.
  • the first phosphor layer 3121 includes yellow phosphor, that is, the first fluorescence is yellow fluorescence.
  • the first collimating device 40, the first reflecting device 50 and the first converging device 60 are sequentially arranged on the second light channel.
  • the first collimating device 40 is used to collimate the first excitation light reflected by the color wheel 30 and the second excitation light to the first reflection device 50.
  • the first reflecting device 50 is used to reflect the first excitation light and the second excitation light emitted from the first collimating device 40 to the first converging device 60.
  • the first condensing device 60 is used to condense the first excitation light and the second excitation light emitted from the first reflection device 50 and then exit to the second spectroscopic device 70.
  • the first light splitting device 20, the second converging device 80, and the second reflecting device 90 are sequentially located on the first light channel.
  • the first spectroscopic device 20 is also used to guide the first fluorescence and the second fluorescence emitted from the color wheel 30 to the second converging device 80.
  • the first spectroscopic device 20 transmits the first fluorescence and the second fluorescence to the second converging device 80.
  • the first spectroscopic device 20 is an anti-blue-yellow lens, that is, the first spectroscopic device 20 can reflect blue light and can transmit yellow light.
  • the remaining unconverted part of the first excitation light will be reflected by the color wheel 30 to the first spectroscopic device 20, and the first spectroscopic device 20 will An excitation light is reflected to eliminate the first excitation light mixed in the fluorescence to a certain extent to avoid the first excitation light affecting the fluorescence color coordinate.
  • the second condensing device 80 is used to condense the first fluorescent light and the second fluorescent light emitted from the first spectroscopic device 20 and then output to the second reflecting device 90.
  • the second reflecting device 90 is used to reflect the first fluorescent light and the second fluorescent light emitted from the second condensing device 80 to the second spectroscopic device 70.
  • the second light splitting device 70 is disposed at the intersection of the first optical channel and the second optical channel.
  • the second spectroscopic device 70 is used to combine the first fluorescence light and the second fluorescence light propagating along the first optical channel and the first excitation light and the light source propagating along the second optical channel
  • the second excitation light is merged into the same light path.
  • the second spectroscopic device 70 is used to guide the first excitation light and the second excitation light emitted from the first concentrating device 60 to the first uniform light device 100, and is also used to guide the second
  • the first fluorescence and the second fluorescence reflected by the reflection device 90 are sent to the first light homogenizing device 100.
  • the second spectroscopic device 70 reflects the first excitation light and the second excitation light to the first uniform light device 100, transmits the first fluorescence and the second fluorescence To the first light homogenizing device 100.
  • the second beam splitter 70 is an area beam splitter.
  • the second beam splitter 70 includes a first area 71 at the center and a second area 72 disposed around the first area 71.
  • the first area 71 is an anti-blue and red-transparent green lens, that is, the first area 71 is used to reflect blue light and red light and transmit green light.
  • the second area 72 is an anti-blue yellow lens, that is, the second area 72 is used to reflect blue light and transmit yellow light. Since the second spectroscopic device 70 can again eliminate the first excitation light remaining in the fluorescence, thereby further preventing the first excitation light from affecting the fluorescence color coordinates.
  • the first light homogenizing device 100 is disposed on the light path of the first excitation light, the first fluorescence, and the second fluorescence emitted by the second beam splitter 70.
  • the first light homogenizing device 100 is used to homogenize the first excitation light, the second excitation light, the first fluorescence, and the second fluorescence emitted from the second beam splitting device 70 to the A spatial modulator (not shown).
  • a second collimating device 101 is further included between the second beam splitting device 70 and the first light homogenizing device 100.
  • the second collimating device 101 is used to collimate and emit the first excitation light, the second excitation light, the first fluorescence, and the second fluorescence emitted from the second spectroscopic device 70 To the first light homogenizing device 100. Wherein, when the light collimated by the second collimating device 101 is incident on the first light homogenizing device 100, the angle is small.
  • the first excitation light source 10 may also be located above the first spectroscopic device 20.
  • the first spectroscopic device 20 is an anti-yellowing blue lens. That is, the first spectroscopic device 20 is used to transmit the first excitation light emitted by the first excitation light source 10 to the color wheel 30. When the first excitation light is excited by the color wheel 30 to generate the first fluorescence and the second fluorescence, the first spectroscopic device 20 is also used to reflect the first fluorescence and the second fluorescence The fluorescence simultaneously transmits and removes the first excitation light mixed in the first fluorescence and the second fluorescence. At this time, the positions of the second concentrating device 80 and the second reflecting device 90 can be changed accordingly, so as to guide the first fluorescence and the second fluorescence to the second spectroscopic device 70, which will not be repeated here. .
  • the color wheel 30 of this embodiment is not provided with a filter structure, but uses the first spectroscopic device to reflect and eliminate the first excitation light mixed in the fluorescence to avoid the first excitation light affecting the fluorescence color coordinates, Omitting the filter structure is beneficial to reduce the size of the color wheel 30, thereby reducing the volume of the entire projection system.
  • the second excitation light and the first fluorescence are combined by the second beam splitting device 70, so that the second excitation light utilization rate is high and the red light is improved Light display effect, thereby improving the color of the first fluorescence generated due to the excitation of the phosphor is usually not pure, and the color wheel 30 does not have a filter area for modifying the first fluorescence, resulting in a poor red display effect problem.
  • FIG. 7 is a schematic structural diagram of a light source system 2 according to a second embodiment of the present invention.
  • the difference from the light source system 1 is that the light source system 2 further includes a third excitation light source 10c and a third beam splitter 140.
  • the third excitation light source 10c is used to emit third excitation light.
  • the third excitation light is a green laser, but it is not limited thereto.
  • the third excitation light source 10c and the second excitation light source 10b are located on the same side of the color wheel 30', and the emission direction of the third excitation light is substantially perpendicular to the second excitation from the second excitation light source 10b The direction of light exit.
  • the third excitation light source 10c may be a semiconductor diode or a semiconductor diode array, such as a laser diode (LD) or a light emitting diode (LED).
  • LD laser diode
  • LED light emitting diode
  • the third beam splitter 140 is disposed at the intersection of the propagation path of the third excitation light emitted by the third excitation light source 10c and the propagation path of the second excitation light emitted by the second excitation light source 10b.
  • the third beam splitter 140 is used to guide the second excitation light emitted by the second excitation light source 10b to the color wheel 30, and guide the third excitation light emitted by the third excitation light source 10c to the Color wheel 30.
  • the third spectroscopic device 140 transmits the second excitation light to the color wheel 30 and reflects the third excitation light to the color wheel 30.
  • the third light splitting device 140 is an anti-green translucent lens, that is, the third light splitting device 140 can reflect green light and can transmit red light.
  • the color wheel 30 ′ of the light source system 2 is different from the aforementioned color wheel 30 in that the third section 313 further includes a setting toward the third excitation light source 10 c Compared with the second surface 3102, the third inclined surface 3132 is inclined at 45 degrees. The third inclined surface 3132 is used to reflect the third excitation light emitted from the third excitation light source 10c to the second light channel for propagation.
  • the second light splitting device 70' of the light source system 2 is used to propagate the first fluorescence and the second fluorescence propagating along the first optical channel and the The first excitation light, the second excitation light, and the third excitation light merge into the same light exit path.
  • the third excitation light source 10c emits the third excitation light when the third section 313 is located on the propagation path of the first excitation light.
  • the second light splitting device 70' of the light source system 2 is different from the aforementioned second light splitting device 70 in that the first area 71 of the second light splitting device 70' is a highly reflective anti-blue, red, red and green
  • the first area 71 is used to reflect the first excitation light, the second excitation light, and the third excitation light emitted from the first converging device 60.
  • the structure and optical path of the other parts of the light source system 2 are the same as the structure and optical path of the corresponding part of the light source system 1 in the first embodiment, which will not be repeated here.
  • a third excitation light source 10c is added to emit third excitation light, and the third excitation light and the second fluorescence are combined at the second beam splitter 70' with an optical expansion amount, so that the third excitation light utilization efficiency is high Therefore, the problem that the color coordinates of the second fluorescent powder excited when the second fluorescence is generated as the green display light cannot meet the color gamut requirement is improved.
  • the present invention also provides a projection system (not shown) using the light source systems 1 and 2 described above.
  • the projection system also includes a spatial modulator and a projection lens. The light emitted by the first uniform light device 100 is projected by the projection lens after passing through the spatial modulator, thereby completing the enhancement of the color gamut of the projected product.

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  • Engineering & Computer Science (AREA)
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Abstract

一种投影装置，包括：第一激发光源、第二激发光源、第一分光装置、色轮及第二分光装置。第一、第二激发光源分别发射第一、第二激发光。第一分光装置将第一激发光引导至色轮。色轮包括第一区段、第二区段。第二区段将第一激发光转换为第一荧光，第一荧光沿第一光通道传播。第一区段引导第一激发光至第二光通道传播。第二区段还引导第二激发光至第二光通道传播，第一分光装置引导第一荧光至第二分光装置并去除第一荧光中混合的第一激发光。第二分光装置将沿第一光通道传播的第一荧光以及沿第二光通道传播的第一激发光与第二激发光合并至同一出光光路。

Description

光源系统及投影系统 技术领域
本发明涉及投影显示技术，尤其涉及一种光源系统及具有该光源系统的投影系统。
背景技术
目前激光荧光混合光源凭借其长寿命、低成本、高亮度的优势广泛应用于各类投影设备中，并具备非常好的显示效果。而投影设备中常用的色轮均为反射式色轮，实际工作中，激光器出射的蓝激光先通过荧光轮激发荧光粉产生荧光，然后通过色轮滤光后入射空间光调制器，最后由镜头投射产生投影图像。由于荧光中残存的蓝激光对荧光色坐标影响很大，影响投影显示效果，因此，通常需要采用荧光轮和滤光轮的双色轮方案。然而，双色轮方案无疑会使得色轮体积增大，不利于产品的小型化。其次，红色荧光粉受激产生的红色荧光的颜色通常不纯，导致红色显示效果不好。
发明内容
有鉴于此，有必要提供一种光源系统以及具有该光源系统的投影系统，从而解决以上问题。
本发明实施例提供一种光源系统，包括：第一激发光源、第二激发光源、第一分光装置、色轮以及第二分光装置，其中：所述第一激发光源用于发射第一激发光；所述第二激发光源用于发射第二激发光；所述第一分光装置用于将所述第一激发光源发出的第一激发光引导至 所述色轮；
所述色轮至少包括第一区段以及第二区段，所述第一区段以及所述第二区段时序地设置于被所述第一分光装置引导的所述第一激发光的传播路径上，所述第二区段用于将所述第一激发光转换为第一荧光，所述第一荧光沿第一光通道进行传播，所述第二区段还用于将所述第二激发光引导至第二光通道进行传播，所述第一区段用于将所述第一激发光引导至第二光通道进行传播，所述第一分光装置设置于所述第一光通道上，还用于引导所述第一荧光至所述第二分光装置并去除所述第一荧光中混合的第一激发光；所述第二分光装置设置于所述第一光通道以及所述第二光通道的交汇处，用于将沿所述第一光通道进行传播的所述第一荧光以及沿所述第二光通道进行传播的所述第一激发光与所述第二激发光合并至同一出光光路。
本发明实施例还提供一种投影系统包括如上所述的光源系统。
本发明实施例的所述色轮上未设有滤光结构，而是利用第一分光装置反射并消除荧光中混合的第一激发光以避免所述第一激发光对荧光色坐标产生影响，而省略滤光结构有利于减小所述色轮的尺寸，从而减小整个投影系统的体积；再者，通过增加第二激发光源以出射第二激发光，所述第二激发光与第一荧光通过所述第二分光装置进行合光，使得第二激发光利用率高并改善红光或绿光显示效果，从而改善由于荧光粉受激产生的第一荧光/第二荧光的颜色通常不纯，且所述色轮不存在对所述第一荧光/第二荧光进行修色的滤光区域导致显示效果不好的问题。
附图说明
图1是本发明第一实施例的光源系统的结构示意图。
图2为图1所示的光源系统于另一状态时的结构示意图。
图3是图1中光源系统的色轮的平面示意图。
图4是图3所示的光源系统的色轮沿IV-IV的剖面示意图。
图5是图3所示的色轮沿V-V的剖面示意图。
图6是图1所示的光源系统的第二分光装置的平面示意图。
图7是本发明第二实施例的光源系统的结构示意图。
图8是图7所示的光源系统的色轮的平面示意图。
图9是图8所示的色轮沿VIIII-VIIII的剖面示意图。
符号说明
光源系统 1，2
第一激发光源 10a
第二激发光源 10b
第三激发光源 10c
第一分光装置 20
色轮 30，30’
色轮板 31
驱动装置 32
第一准直装置 40
第一反射装置 50
第一会聚装置 60
第二分光装置 70，70’
第一区域 71
第二区域 72
第二会聚装置 80
第二反射装置 90
第一匀光装置 100
第二准直装置 101
第二匀光装置 110
第三会聚装置 120
光收集装置 130
第三分光装置 140
色轮基板 310
第一区段 311
第二区段 312
第三区段 313
第一表面 3101
第二表面 3102
第一荧光粉层 3121
第二斜面 3122
第二荧光粉层 3131
第三斜面 3132
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
实施例一
请参阅图1和图2，是本发明第一实施例的光源系统1的结构示意图。所述光源系统1包括第一激发光源10a、第二激发光源10b、第一分光装置20、色轮30、第一准直装置40、第一反射装置50、第一会聚装置60、第二分光装置70、第二会聚装置80、第二反射装置90以及第一匀光装置100。
所述第一激发光源10a用于发射第一激发光，所述第一激发光可为蓝色激光，但并不以此为限。所述第一激发光源10a可以为半导体二极管或者半导体二极管阵列，如激光二极管(LD)或者发光二极管(LED)等。
所述第一分光装置20设置于所述第一激发光源10a发射的第一激发光的传播路径上。所述第一分光装置20用于将所述第一激发光源 10a发出的第一激发光引导至所述色轮30。在本实施方式中，如图1和图2所示，所述第一激发光源10a位于所述第一分光装置20的左方，所述第一分光装置20将所述第一激发光反射至所述色轮30。所述第一激发光源10a与所述第一分光装置20之间还可设有一第二匀光装置110以及一第三会聚装置120。所述第二匀光装置110用于将所述第一激发光源10a发出的第一激发光均匀化后出射至所述第三会聚装置120。所述第三会聚装置120用于将所述第二匀光装置110出射的第一激发光进行会聚后出射至所述第一分光装置20。其中，所述第二匀光装置110可以是散射片、单复眼、双复眼或方棒等，但并不以上述为限。经过所述第二匀光装置110与所述第三会聚装置120后，所述第一激发光的光斑尺寸增大，最大功率密度降低。
所述第二激发光源10b用于发射第二激发光，所述第二激发光可为红色激光，但并不以此为限。所述第一激发光源10a与所述第二激发光源10b位于分别位于所述色轮30的两侧，所述第二激发光的发射方向大致垂直于来自所述第一激发光源10a的所述第一激发光的发射方向。所述第二激所述第二激发光源10可以为半导体二极管或者半导体二极管阵列，如激光二极管(LD)或者发光二极管(LED)等。
请结合参阅图3至图5，所述色轮30包括色轮板31和驱动装置32。所述驱动装置32用于驱动所述色轮板31转动。所述驱动装置32可为马达。
所述色轮板31用于接收所述第一分光装置20出射的第一激发光以及所述第二激发光源10b出射的所述第二激发光。所述色轮板31包括一色轮基板310以及沿所述色轮30的边缘设置的一第一区段311、一第二区段312以及一第三区段313。所述第一区段311、所述第二区段312以及所述第三区段313时序地设置于被所述第一分光装置20引导的所述第一激发光的传播路径上。其中，所述色轮基板310 包括朝向所述第一分光装置20的第一表面3101以及朝向所述第二激发光源10b的第二表面3102，所述第一表面3101与所述第二表面3102相对设置。所述第一区段311为朝向所述第一分光装置20且相较于所述第一表面3101倾斜设置的一第一斜面，所述第一斜面可由所述第一表面3101所在平面朝向所述第二表面3012转动45度形成(即，所述第一斜面相较于所述第一表面3101倾斜的角度为45度)。所述第一斜面用于将所述第一分光装置20出射的第一激发光反射至第二光通道进行传播，具体地，所述第一斜面为反射散射层，从而使得所述第一激发光的散斑现象减弱。所述第二区段312包括形成于所述第一表面3101上的第一荧光粉层3121以及朝向所述第二激发光源10b设置且相较于所述第二表面3102倾斜设置的第二斜面3122，所述第二斜面3122可由所述第二表面3102所在平面朝向所述第一表面3101转动45度形成(即，所述第二斜面3122相较于所述第二表面3102倾斜的角度为45度)。所述第一荧光粉层3121用于将所述第一分光装置20出射的第一激发光转换为第一荧光并将所述第一荧光反射至第一光通道进行传播，所述第二斜面3122用于将所述第二激发光源10b出射的第二激发光反射至第二光通道进行传播。其中，所述第二激发光源10b在所述第二区段312位于所述第一激发光的传播路径上时，发射所述第二激发光。需要说明的是，所述第一斜面以及所述第二斜面倾斜的角度并不限于45度，还可以为40度、30度等，所述角度可以根据反射光所需传播的路径进行设置。所述第三区段313包括形成于所述第一表面3101上的第二荧光粉层3131，所述第二荧光粉层3131用于将所述第一分光装置20出射的第一激发光转换为第二荧光并将所述第二荧光反射至第一光通道进行传播。其中，所述第一光通道为所述第一荧光与所述第二荧光自所述色轮30出射后进行传播的路径。所述第二光通道为所述第一激发光与所述第二激发光自所述色轮30出射后进 行传播的路径。在本实施方式中，所述第一荧光粉层3121包括红色荧光粉，即，所述第一荧光为红色荧光；所述第二荧光粉层3131包括绿色荧光粉，即，所述第二荧光为绿色荧光。因此，不同区段随着所述色轮30的转动依次接收所述第一激发光并产生时序的三基色光。需要说明的是，所述第二区段312以及所述第三区段313，除了所对应颜色的荧光粉外，还可以包括用于封装荧光粉的粘接剂，粘接剂可以为树脂、硅胶、水玻璃、玻璃或陶瓷等；其中，当采用玻璃或陶瓷作为荧光粉的封装材料时，所述色轮30也称为荧光玻璃或荧光陶瓷。具体的，陶瓷材料可以选择为氧化铝、氮氧化铝、镁铝尖晶石中的至少一种。在本实施方式中，所述色轮30与所述第一分光装置20还可设置一光收集装置130，所述光收集装置130用于收集所述色轮30出射的第一荧光以及第二荧光并出射至所述第一分光装置20。
在其它实施方式中，所述第三区段313可以省略，即，可以不通过所述第二荧光粉层3131产生绿色荧光。此时，所述第一荧光粉层3121包括黄色荧光粉，即，所述第一荧光为黄色荧光。
所述第一准直装置40、所述第一反射装置50以及所述第一会聚装置60依次设置于所述第二光通道上。所述第一准直装置40用于将所述色轮30反射的第一激发光以及所述第二激发光进行准直后出射至所述第一反射装置50。所述第一反射装置50用于将所述第一准直装置40出射的所述第一激发光以及所述第二激发光反射至所述第一会聚装置60。所述第一会聚装置60用于将所述第一反射装置50出射的所述第一激发光以及所述第二激发光进行会聚后出射至所述第二分光装置70。
所述第一分光装置20、所述第二会聚装置80以及所述第二反射装置90依次位于所述第一光通道上。所述第一分光装置20还用于引导所述色轮30出射的所述第一荧光以及所述第二荧光至所述第二会 聚装置80。在本实施方式中，所述第一分光装置20透射所述第一荧光以及所述第二荧光至所述第二会聚装置80。所述第一分光装置20为反蓝透黄镜片，即，所述第一分光装置20能够反射蓝色光，并且能够透射黄色光。其中，在激发荧光粉的过程中，剩余的未被转换的部分第一激发光将被所述色轮30反射至所述第一分光装置20，而所述第一分光装置20对所述第一激发光进行反射，从而在一定程度上消除荧光中混合的第一激发光以避免所述第一激发光对荧光色坐标产生影响。
所述第二会聚装置80用于将所述第一分光装置20出射的所述第一荧光以及所述第二荧光进行会聚后出射至所述第二反射装置90。所述第二反射装置90用于将所述第二会聚装置80出射的所述第一荧光以及所述第二荧光反射至所述第二分光装置70。
所述第二分光装置70设置于所述第一光通道以及所述第二光通道的交汇处。所述第二分光装置70用于将沿所述第一光通道进行传播的所述第一荧光与所述第二荧光以及沿所述第二光通道进行传播的所述第一激发光与所述第二激发光合并至同一出光光路。具体地，所述第二分光装置70用于将所述第一会聚装置60出射的第一激发光以及第二激发光引导至所述第一匀光装置100，还用于引导所述第二反射装置90反射的所述第一荧光以及所述第二荧光至所述第一匀光装置100。在本实施方式中，所述第二分光装置70将所述第一激发光以及所述第二激发光反射至所述第一匀光装置100，透射所述第一荧光以及所述第二荧光至所述第一匀光装置100。请参阅图6，所述第二分光装置70为区域分光片，所述第二分光装置70包括位于中心的一第一区域71以及围绕所述第一区域71设置的一第二区域72。所述第一区域71为反蓝反红透绿镜片，即，所述第一区域71用于反射蓝色光以及红色光并透射绿色光。所述第二区域72为反蓝透黄镜片，即，所述 第二区域72用于反射蓝色光并透射黄色光。由于所述第二分光装置70能够再次消除荧光中残余的第一激发光，从而进一步避免所述第一激发光对荧光色坐标产生影响。
所述第一匀光装置100设置于所述第二分光装置70出射的第一激发光、第一荧光以及第二荧光的出光光路上。所述第一匀光装置100用于将所述第二分光装置70出射的所述第一激发光、所述第二激发光、所述第一荧光以及所述第二荧光均匀化后出射至一空间调制器(图未示)。在本实施方式中，在所述第二分光装置70与所述第一匀光装置100之间还包括一第二准直装置101。所述第二准直装置101用于将所述第二分光装置70出射的所述第一激发光、所述第二激发光、所述第一荧光以及所述第二荧光进行准直后出射至所述第一匀光装置100。其中，经所述第二准直装置101准直后的光入射至所述第一匀光装置100时，角度较小。
在其它实施方式中，所述第一激发光源10还可位于所述第一分光装置20的上方，相应地，所述第一分光装置20为反黄透蓝镜片。即，所述第一分光装置20用于将所述第一激发光源10发射的所述第一激发光透射至所述色轮30。当所述第一激发光被所述色轮30激发而产生所述第一荧光以及所述第二荧光时，所述第一分光装置20还用于反射所述第一荧光以及所述第二荧光，同时透射并去除所述第一荧光以及所述第二荧光中混合的第一激发光。此时，所述第二会聚装置80以及所述第二反射装置90的位置可相应变更，从而将所述第一荧光以及所述第二荧光引导至所述第二分光装置70，此不赘述。
本实施例的所述色轮30上未设有滤光结构，而是利用第一分光装置反射并消除荧光中混合的第一激发光以避免所述第一激发光对荧光色坐标产生影响，而省略滤光结构有利于减小所述色轮30的尺寸，从而减小整个投影系统的体积。再者，通过增加第二激发光源10b以 出射第二激发光，所述第二激发光与第一荧光通过所述第二分光装置70进行合光，使得第二激发光利用率高并改善红光显示效果，从而改善由于荧光粉受激产生的第一荧光的颜色通常不纯，且所述色轮30不存在对所述第一荧光进行修色的滤光区域导致红色显示效果不好的问题。
实施例二
请参阅图7，是本发明第二实施例的光源系统2的结构示意图。与所述光源系统1不同的是：所述光源系统2还进一步包括一第三激发光源10c以及一第三分光装置140。
所述第三激发光源10c用于发射第三激发光，所述第三激发光为绿色激光，但并不以此为限。所述第三激发光源10c与所述第二激发光源10b位于色轮30’的同一侧，所述第三激发光的发射方向大致垂直于来自所述第二激发光源10b的所述第二激发光的出射方向。所述第三激发光源10c可以为半导体二极管或者半导体二极管阵列，如激光二极管(LD)或者发光二极管(LED)等。
所述第三分光装置140设置于所述第三激发光源10c发射的第三激发光的传播路径与所述第二激发光源10b发射的第二激发光的传播路径的交汇处。所述第三分光装置140用于将所述第二激发光源10b发射的第二激发光引导至所述色轮30，并将所述第三激发光源10c发射的第三激发光引导至所述色轮30。在本实施方式中，所述第三分光装置140将所述第二激发光透射至所述色轮30，并将所述第三激发光反射至所述色轮30。所述第三分光装置140为反绿透红镜片，即，所述第三分光装置140能够反射绿色光，并且能够透射红色光。
对应地，请一并参照图8和图9，所述光源系统2的色轮30’与前述色轮30不同的是：所述第三区段313还包括朝向所述第三激发光 源10c设置且相较于所述第二表面3102呈45度倾斜设置的第三斜面3132。所述第三斜面3132用于将所述第三激发光源10c出射的所述第三激发光反射至所述第二光通道进行传播。此时，所述光源系统2的第二分光装置70’用于将沿所述第一光通道进行传播的所述第一荧光与所述第二荧光以及沿所述第二光通道进行传播的所述第一激发光、所述第二激发光以及所述第三激发光合并至同一出光光路。其中，所述第三激发光源10c在所述第三区段313位于所述第一激发光的传播路径上时，发射所述第三激发光。
对应地，所述光源系统2的第二分光装置70’与前述第二分光装置70不同的是：所述第二分光装置70’的第一区域71为一高反射的反蓝反红反绿镜片，所述第一区域71用于反射所述第一会聚装置60出射的所述第一激发光、所述第二激发光以及所述第三激发光。
此外，所述光源系统2其它部分的结构以及光路走向与实施例一中的光源系统1的对应部分的结构和光路走向相同，在此不再进行赘述。
本实施例增加第三激发光源10c以出射第三激发光，所述第三激发光与第二荧光在所述第二分光装置70’利用光学扩展量合光，使得第三激发光利用效率高，从而改善第二荧光粉受激产生的第二荧光作为绿色显示光时色坐标不能满足色域要求的问题。
此外，本发明还提供一种采用上述光源系统1、2的投影系统(图未示)。所述投影系统还包括空间调制器以及投影镜头。经所述第一匀光装置100出射后的光经所述空间调制器后由所述投影镜头投射投影画面，从而完成投影产品色域的提升。
以上实施方式仅用以说明本发明的技术方案而非限制，尽管参照以上较佳实施方式对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或等同替换都不应脱离 本发明技术方案的精神和范围。

Claims (10)

  1. 一种光源系统，包括：第一激发光源、第二激发光源、第一分光装置、色轮以及第二分光装置，其中：
    所述第一激发光源用于发射第一激发光；
    所述第二激发光源用于发射第二激发光；
    所述第一分光装置用于将所述第一激发光源发出的第一激发光引导至所述色轮；
    所述色轮至少包括第一区段以及第二区段，所述第一区段以及所述第二区段时序地设置于被所述第一分光装置引导的所述第一激发光的传播路径上，所述第二区段用于将所述第一激发光转换为第一荧光，所述第一荧光沿第一光通道进行传播，所述第二区段还用于将所述第二激发光引导至第二光通道进行传播，所述第一区段用于将所述第一激发光引导至第二光通道进行传播，所述第一分光装置设置于所述第一光通道上，还用于引导所述第一荧光至所述第二分光装置并去除所述第一荧光中混合的第一激发光；
    所述第二分光装置设置于所述第一光通道以及所述第二光通道的交汇处，用于将沿所述第一光通道进行传播的所述第一荧光以及沿所述第二光通道进行传播的所述第一激发光与所述第二激发光合并至同一出光光路。
  2. 如权利要求1所述的光源系统，其特征在于，所述色轮还包括第三区段，所述第一区段、所述第二区段以及所述第三区段时序地设置于被所述第一分光装置引导的所述第一激发光的传播路径上，所述第三区段用于将所述第一激发光转换为第二荧光，所述第二荧光沿所述第一光通道进行传播，所述第一分光装置还用于引导所述第二荧光至所述第二分光装置并去除所述第二荧光中混合的第一激发光。
  3. 如权利要求2所述的光源系统，其特征在于，还包括第一匀光装置，所述第二分光装置用于引导沿所述第二光通道进行传播的所述第一激发光以及所述第二激发光至所述第一匀光装置，还用于引导沿所述第一光通道进行传播的所述第一荧光以及所述第二荧光至所述第一匀光装置，并去除所述第一荧光中以及所述第二荧光中混合的第一激发光，从而向所述第一匀光装置提供形成时序的三基色光。
  4. 如权利要求3所述的光源系统，其特征在于，所述色轮包括一色轮基板，所述第一区段、所述第二区段以及所述第三区段位于所述色轮基板的边缘，所述色轮基板包括朝向所述第一分光装置的第一表面以及朝向所述第二激发光源的第二表面，所述第一表面与所述第二表面相对设置，所述第一区段为朝向所述第一分光装置且相较于所述第一表面倾斜设置的一第一斜面，所述第一斜面用于将所述第一激发光反射至所述第二光通道，所述第二区段包括形成于所述第一表面上的第一荧光粉层以及朝向所述第二激发光源设置且相较于所述第二表面倾斜设置的第二斜面，所述第一荧光粉层用于将所述第一激发光转换为所述第一荧光，所述第二斜面用于将所述第二激发光反射至所述第二光通道，所述第三区段包括形成于所述第一表面上的第二荧光粉层，所述第二荧光粉层用于将所述第一激发光转换为所述第二荧光。
  5. 如权利要求4所述的光源系统，其特征在于，还包括一第三激发光源以及第三分光装置，所述第三激发光源用于发射第三激发光，所述第三分光装置用于将所述第二激发光源发射的第二激发光引导至所述色轮，并将所述第三激发光源发射的第三激发光引导至所述色轮，所述第三区段还包括朝向所述第三激发光源设置且相较于所述第二表面呈倾斜设置的第三斜面，所述第三斜面用于将所述第三激发光反射至所述第二光通道进行传播，所述第二分光装置还用于将沿所述第二光通道进行传播的所述第三激发光合并至所述出光光路，其中，所述 第二分光装置引导所述第三激发光至所述第一匀光装置。
  6. 如权利要求3所述的光源系统，其特征在于，还包括设置于所述第二光通道上的第一准直装置、第一反射装置以及第一会聚装置，所述第一准直装置用于将所述色轮反射的第一激发光以及所述第二激发光进行准直后出射至所述第一反射装置，所述第一反射装置用于将所述第一准直装置出射的所述第一激发光以及所述第二激发光反射至所述第一会聚装置，所述第一会聚装置用于将所述第一反射装置出射的所述第一激发光以及所述第二激发光进行会聚后出射至所述第二分光装置。
  7. 如权利要求6所述的光源系统，其特征在于，还包括设置于所述第一光通道上的第二会聚装置以及第二反射装置，所述第二会聚装置用于将所述第一分光装置出射的所述第一荧光以及所述第二荧光进行会聚后出射至所述第二反射装置，所述第二反射装置用于将所述第二会聚装置出射的所述第一荧光以及所述第二荧光反射至所述第二分光装置。
  8. 如权利要求7所述的光源系统，其特征在于，所述第一激发光源与所述第一分光装置之间还设有第二匀光装置以及第三会聚装置，所述第二匀光装置用于将所述第一激发光源发出的第一激发光均匀化后出射至所述第三会聚装置，所述第三会聚装置用于将所述第二匀光装置出射的第一激发光进行会聚后出射至所述第一分光装置。
  9. 如权利要求7所述的光源系统，其特征在于，还包括设置于所述第二分光装置与所述第一匀光装置之间的第二准直装置，所述第二准直装置用于将所述第二分光装置出射的所述第一激发光、所述第二激发光、所述第一荧光以及所述第二荧光进行准直后出射至所述第一匀光装置。
  10. 一种投影系统，其特征在于，包括如权利要求1至9任意一 项所述的光源系统。
PCT/CN2019/119139 2018-11-26 2019-11-18 光源系统及投影系统 Ceased WO2020108338A1 (zh)

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