WO2022048324A1 - 一种混合光源系统及投影设备 - Google Patents

一种混合光源系统及投影设备 Download PDF

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Publication number
WO2022048324A1
WO2022048324A1 PCT/CN2021/106460 CN2021106460W WO2022048324A1 WO 2022048324 A1 WO2022048324 A1 WO 2022048324A1 CN 2021106460 W CN2021106460 W CN 2021106460W WO 2022048324 A1 WO2022048324 A1 WO 2022048324A1
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Prior art keywords
light
wavelength
light source
source system
hybrid
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PCT/CN2021/106460
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English (en)
French (fr)
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陈怡学
尹蕾
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成都极米科技股份有限公司
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Publication of WO2022048324A1 publication Critical patent/WO2022048324A1/zh

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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
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2073—Polarisers in the lamp house
    • 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
    • G03B21/208—Homogenising, shaping of the illumination light

Definitions

  • the present invention relates to the field of display technology, and in particular, to a hybrid light source system and a projection device.
  • the projection display light source is a very important component. Its function is to convert light of different colors, different angular distributions, different brightness and different shapes into uniform light spots that illuminate the effective area of the display chip.
  • the present invention provides a hybrid light source system architecture, which can be used for projection display, utilizes the polarization characteristics of lasers, has a simple optical path and a compact structure, can not only utilize the brightness advantages of lasers, but also greatly reduce the speckle effect of pure lasers .
  • the present invention provides a hybrid light source system, comprising:
  • a light-combining element the light-combining element includes a transparent substrate on which a light-splitting filter film is formed, and the light-splitting filter film is used to reflect or transmit a first wavelength of a first wavelength incident on the light-combining element polarization state light, while transmitting or reflecting light of a second polarization state of a first wavelength incident on the light combining element, and transmitting or reflecting light of wavelengths other than the first wavelength;
  • the converter includes a substrate on which a reflection layer and a conversion layer are formed, the reflection layer is used for reflecting the light processed by the conversion layer and guides the light combining element, and the conversion layer includes a wavelength conversion layer and a polarization conversion area, the wavelength conversion area is used for wavelength conversion of the first polarization state light of the first wavelength transmitted or reflected by the light combining element to the converter, and the polarization conversion area is used for The polarization direction of the light in the first polarization state of the first wavelength transmitted or reflected by the light combining element to the converter is converted, and the first polarization state is converted into the second polarization state.
  • the light-splitting filter film includes a polarizing light-splitting film and a filter film, wherein the polarizing light-splitting film is used to reflect or transmit the first wavelength of the first wavelength incident on the light combining element. polarization state light, and transmit or reflect the second polarization state light of the first wavelength incident on the light combining element, and transmit light of wavelengths other than the first wavelength; the filter film is used to transmit the first wavelength of light light, and transmits or reflects the light converted by the wavelength conversion region of the converter to combine light.
  • the polarizing beam splitting film and the filter film may be arranged on the same side of the transparent substrate, or may be arranged on two sides of the transparent substrate respectively.
  • the two layers can be combined into one layer.
  • the filter film is also used to reflect or transmit the light of the second wavelength incident on the light combining element to perform light combining.
  • the light of the second wavelength By introducing the light of the second wavelength, the light of the first wavelength and the light converted by the wavelength conversion area of the converter are combined to synthesize the desired light color.
  • the wavelength conversion area includes a wavelength conversion area 1 and a wavelength conversion area 2, and the wavelength conversion area 1 is used to convert light of a first wavelength into light of a third wavelength, and the wavelength The conversion area 2 is used for converting the light of the first wavelength into the light of the fourth wavelength.
  • the wavelength conversion area 1 and wavelength conversion area 2 of the wavelength conversion area convert the light of the first wavelength into light of two different wavelengths, and then synthesize the required light color with the light of the first wavelength. Only one light source can be used in the projection equipment, saving energy cost.
  • the wavelength conversion region is used to convert the light of the first wavelength into the light of the fifth wavelength.
  • the light of the first wavelength is blue light.
  • the light of the second wavelength is red light or green light.
  • the light colors of the light of the third wavelength and the light of the fourth wavelength are different and selected from red light and green light.
  • the light of the fifth wavelength is red light, green light or yellow light.
  • a wavelength conversion material is provided in the wavelength conversion region, and a quarter-wave plate or an optical rotation plate is provided in the polarization conversion region.
  • the light of the first polarization state of the first wavelength is polarized light having linear polarization or approximately linear polarization.
  • the converter further includes: a driving device for driving the converter to rotate according to a predetermined period; and a connecting wire, which electrically connects the driving device to an external power source.
  • the method further includes: a diffusing sheet, and the light of the first polarization state of the first wavelength is incident on the light combining element after being processed by the diffusing sheet.
  • the method further includes: a lens system 1, the lens system 1 is arranged between the light combining element and the converter, and is used for performing the processing on the incident light and the outgoing light of the converter. Collimation and/or convergence shaping.
  • the method further includes: a second lens system, where the light of the second wavelength is collimated and shaped by the second lens system and then enters the light combining element.
  • the present invention provides a projection device, comprising: a first light source for generating light of a first polarization state of a first wavelength as incident light of a light combining element in a hybrid light source system; a hybrid light source system, the The hybrid light source system is the hybrid light source system described in any one of the first aspect and possible implementations of the first aspect.
  • the method further includes: a second light source, configured to generate light of a second wavelength, and the light of the second wavelength is reflected or transmitted by the light combining element in the hybrid light source system to perform light combining .
  • the first light source is a laser light source for generating linearly polarized or approximately linearly polarized light of the first polarization state of the first wavelength.
  • the hybrid light source system provided by the invention such as the laser-fluorescence hybrid light source system, utilizes the polarization characteristics of the laser and the special film layer of the light combining element to realize the combining of several light colors; and the entire optical path has a simple structure, compact size and practical value. high.
  • FIG. 1A and 1B are schematic structural diagrams of a hybrid light source system in an embodiment of the present invention.
  • FIG. 2 is a front view of a converter in an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another state of the hybrid light source system in an embodiment of the present invention.
  • FIG. 4 is a front view of a converter in another embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a hybrid light source system in another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a hybrid light source system in yet another embodiment of the present invention.
  • FIG. 1A and FIG. 1B are schematic structural diagrams of a hybrid light source system in an embodiment of the present invention.
  • the hybrid light source system includes: a light combining element 1 and a converter 2 .
  • the light combining element 1 includes a transparent substrate 11 on which a light-splitting filter film 12 is formed, and the light-splitting filter film 12 is both It can be arranged on the light beam incident surface of the transparent substrate 11 , or can be arranged on the light beam exit surface of the transparent substrate 11 .
  • the light-splitting filter film 12 is used for polarizing and splitting the polarized light of the first wavelength incident on the light combining element 1, reflecting/transmitting the first polarization state and transmitting/reflecting the second polarization state, and transmitting/reflecting all wavelengths except the first wavelength
  • the converter 2 includes a substrate 21 on which a reflective layer 22 and a conversion layer 23 are formed, and the conversion layer 23 includes a wavelength conversion area 231 and a polarization conversion area 232, as shown in FIG. 2, the wavelength conversion area 231 is used for wavelength conversion of the polarized light of the first wavelength transmitted or reflected by the light combining element 1 to the converter 2, and the polarization conversion area 232 is used for transmitting or reflecting the light combining element 1.
  • the polarization direction of the polarized light of the first wavelength to the converter 2 is converted, the first polarization state is converted into the second polarization state, or the second polarization state is converted into the first polarization state.
  • the light-splitting filter film 12 includes a polarizing light-splitting film 121 and a light filter film 122 , as shown in FIGS. 5 and 6 .
  • the polarizing beam splitting film 121 is used for polarizing and splitting the polarized light of the first wavelength incident on the light combining element 1, reflecting/transmitting the first polarization state and transmitting/reflecting the second polarization state, and transmitting wavelengths other than the first wavelength.
  • Light; the filter film 122 is used to transmit the light of the first wavelength, and transmit or reflect the light converted by the wavelength conversion area 231 of the converter 2 to combine light.
  • the light converted by the wavelength conversion region 231 is used for light combining, the filter film 122 can be omitted, that is, the light splitting filter film 12 only includes the polarized light splitting film 121 .
  • the filter film 122 can also be used to reflect or transmit the light of the second wavelength incident on the light combining element for light combining.
  • the polarizing beam splitting film 121 and the filter film 122 may be disposed on the same side of the transparent substrate 11 , or may be disposed on two opposite sides of the transparent substrate 11 respectively.
  • the polarizing beam splitting film 121 and the filter film 122 are arranged on the same surface of the transparent substrate 11, they may be polarizing beam splitting films and filter films with respective functions, or may have the functions of both polarizing beam splitting films and filter films. that is, one side of the transparent substrate 11 can be coated with a polarizing beam splitting film first, and then coated with a filter film, or first coated with a filter film, and then coated with a polarizing beam splitter film, the order of the two is different.
  • one side of the transparent substrate 11 can also be directly coated with a spectroscopic filter film that can realize the functions of both the polarizing beam splitting film 121 and the filter film 122; when the polarizing beam splitting film 121 and the filter film 122 are arranged on the transparent substrate
  • the polarizing beam splitting film 121 can be arranged on the beam incident surface of the transparent substrate 11
  • the filter film 122 can be arranged on the beam exit surface of the transparent substrate 11, or the polarizing beam splitting film 121 can be arranged on the light beam of the transparent substrate 11.
  • the filter film 122 is disposed on the light beam incident surface of the transparent substrate 11, which is not limited in the present invention.
  • the polarizing beam splitting film 121 is a specific wavelength polarizing beam splitting film, which only performs polarization beam splitting on the polarized light of the first wavelength, such as transmitting the light of the first wavelength of the P polarization state and reflecting the first wavelength of the S polarization state.
  • Light, with respect to light of wavelengths other than the first wavelength, is transmitted regardless of whether it is in a P-polarized state or an S-polarized state.
  • the polarization conversion area 232 in the conversion layer 23 can convert linearly polarized light into circularly polarized light, and also can convert circularly polarized light into linearly polarized light, for example, the light of the first wavelength of the S polarization state passes through the polarization conversion area twice.
  • a quarter-wave plate, an optical rotator, or a material with the same function is arranged in the polarization conversion area 232.
  • the quarter-wave plate or optical rotator A material such as a sheet is fixed on the base 21 .
  • the light of the first wavelength is incident on the light combining element 1 in a first polarization state
  • the first polarization state is an S polarization state
  • the second polarization state is a P polarization state.
  • the light of the first wavelength is reflected by the light combining element 1 and then incident to the converter 2.
  • the light of the first wavelength is incident to the polarization conversion area 232, it is reflected by the reflective layer 22 under the polarization conversion area 232, and undergoes two polarization conversions back and forth.
  • Region 232 the polarization state of which is converted from the first polarization state to the second polarization state.
  • the light of the first wavelength of the second polarization state can pass through the light combining element 1 .
  • the light of the fifth wavelength When the light of the first wavelength is incident on the wavelength conversion region 231, the light of the fifth wavelength is generated, as shown in FIG. 3 .
  • the light of the fifth wavelength is reflected by the reflection layer 22 and then transmitted through the light combining element 1 .
  • the light of the first wavelength and the light of the fifth wavelength transmitted through the light combining element 1 are combined to form a desired light color. If the light of the first wavelength is blue light, and the yellow light conversion material is provided in the wavelength conversion region 231 , the light of the fifth wavelength is yellow light, and the yellow light and the blue light are combined into white light.
  • the base 21 of the converter 2 may be a circular substrate, the wavelength conversion region 231 and the polarization conversion region 232 are arranged in the circumferential direction of the circular substrate, and a fan ring, a half ring, etc. are formed on the circular substrate, such as Figure 2 and Figure 4.
  • the converter 2 may further include a driving device 24 and a connecting wire (not shown in the figure), the driving device 24 is used to drive the converter to rotate according to a predetermined period, and the connecting wire electrically connects the driving device 24 to an external power source.
  • the substrate 21 can be transparent or opaque, such as a metal substrate formed of copper, aluminum, etc., the substrate 21 is processed by means of silver evaporation, etc., and a reflection layer 22 and a conversion layer 23 are formed on the surface of the substrate 21.
  • the polarization conversion region 232 is formed by arranging any material or element capable of changing the polarization direction on the substrate 21 , such as a 1/4 wave plate, and the 1/4 wave plate is fixed on the substrate 21 by sticking or the like. If the substrate 21 is transparent, the reflective layer 22 and the conversion layer 23 can be located on the same side of the substrate 21 or on both sides of the substrate 21 respectively.
  • the incident light of the converter 2 is processed by the conversion layer 23 and then passed through the reflective layer 22 reflection. If the substrate 21 is opaque, the reflection layer 22 and the conversion layer 23 are located on the light beam incident surface of the substrate 21 , and the reflection layer 22 is located in the middle of the conversion layer 23 and the substrate 21 .
  • the wavelength conversion region 231 includes a wavelength conversion region 1 2311 and a wavelength conversion region 2 2312, and the wavelength conversion region 1 2311 is used to convert the light of the first wavelength into the light of the third wavelength.
  • the second wavelength conversion area 2312 is used to convert the light of the first wavelength into the light of the fourth wavelength.
  • the light of the first wavelength, the light of the third wavelength and the light of the fourth wavelength are combined to form the desired light color.
  • the first wavelength conversion area 2311 and the second wavelength conversion area 2312 are provided with green light conversion material and red light conversion material respectively, then finally blue light, red light and green light are synthesized into white light.
  • FIG. 5 is a schematic structural diagram of a hybrid light source system in another embodiment of the present invention.
  • the hybrid light source system includes a light combining element 1 and a converter 2 .
  • the light-splitting filter film 12 on the transparent substrate 11 of the light combining element 1 includes a polarizing light-splitting film 121 and a light-filtering film 122 , and the polarizing light-splitting film 121 and the filter film 122 are respectively arranged on the transparent
  • the function of the filter film 122 is to transmit the light of the first wavelength, and transmit the light converted by the wavelength conversion region of the converter to combine light.
  • the light of the second wavelength can be introduced, and the filter of the light combining element 1 can be used.
  • the light film 122 reflects the light of the second wavelength to synthesize light of a desired color with the light of the first wavelength and the light converted by the wavelength conversion region 231 of the converter 2 .
  • the light of the desired color is white light
  • the light of the first wavelength is blue light
  • the wavelength conversion material provided in the wavelength conversion area 231 is a green light conversion material, such as green phosphor
  • the light of the fifth wavelength is green.
  • the green light and blue light passing through the light combining element 1 cannot be combined into white light, and red light can be introduced.
  • the red light is reflected by the filter film 122 of the light combining element 1 to combine with green light and blue light, and white light can be combined.
  • the wavelength conversion material arranged in the wavelength conversion area 231 is a red light conversion material, such as red phosphor powder
  • the light of the fifth wavelength is red light
  • the introduced light can be green light
  • the green light is filtered by the light combining element 1 .
  • the light film 122 reflects and combines red light and blue light to combine white light.
  • FIG. 6 is a schematic structural diagram of a hybrid light source system in yet another embodiment of the present invention.
  • the hybrid light source system includes: a light combining element 1 , a converter 2 , a diffuser 3 , a lens system 4 and a lens system 5 .
  • the first light source 01 generates polarized light of a first wavelength as the incident light of the light combining element 1 , preferably, the first light source 01 is a laser light source for generating linearly polarized or approximately linearly polarized polarized light of the first wavelength.
  • the second light source 02 generates light of a second wavelength, and the light of the second wavelength is reflected or transmitted by the filter film 122 of the light combining element 1 to perform light combining.
  • the diffusing sheet 3 is located between the first light source 01 and the light combining element 1 , and the laser light generated by the first light source 01 is first homogenized by the diffusing sheet 3 to avoid damage to the phosphor layer due to high power density.
  • the lens system 4 is arranged between the light combining element 1 and the converter 2 for collimating and/or focusing and shaping the incident light and the outgoing light of the converter 2 .
  • the lens system 5 is arranged between the second light source 02 and the light combining element 1, and is used for collimating and shaping the light of the second wavelength.
  • Embodiments of the present invention further provide a projection device, including the hybrid light source system involved in the above embodiments, and the projection device further includes other components, such as a projection lens, etc., the settings of these components can be found in the related art, which will not be repeated here.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种混合光源系统及投影设备，混合光源系统包括：合光元件（1），合光元件（1）包括透明基底（11），透明基底（11）上形成有分光滤光膜（12）；转换器（2），转换器（2）包括基底（21），基底（21）上形成有反射层（22）和转换层（23），反射层（22）用于反射经转换层（23）处理的光并导向合光元件（1），转换层（23）包括波长转换区（231）和偏振转换区（232）；混合光源系统利用光的偏振特性及合光元件（1）特殊的膜层实现几种光色的合光，且整个光路构造简单，体积紧凑。

Description

一种混合光源系统及投影设备 技术领域
本发明涉及显示技术领域，尤其涉及一种混合光源系统及投影设备。
背景技术
在投影显示产品中，投影显示光源是非常重要的部件，它的功能在于将不同颜色、不同角度分布、不同亮度和不同形状的光线，转换成照射到显示芯片有效区域的均匀光斑。
在投影显示领域，传统的灯泡由于其自身的缺陷已越来越不被采用，而LED、激光荧光粉和三色激光等新型光源在亮度、色彩、寿命、能耗等方面表现出优异的特性，逐渐成为投影显示用光源的主流。在三种新型光源技术中，LED光源难以实现高亮度，而三激光光源存在散斑困扰，无法得到理想的画质。
发明内容
有鉴于此，本发明提供一种混合光源系统架构，可以用于投影显示，利用激光的偏振特性，光路简单且结构紧凑，既能利用激光的亮度优势，又能大大降低纯激光的散斑影响。
第一方面，本发明提供一种混合光源系统，包括：
合光元件，所述合光元件包括透明基底，所述透明基底上形成有分光滤光膜，所述分光滤光膜用于反射或透射入射至所述合光元件的第一波长的第一偏振态光，而透射或反射入射至所述合光元件的第一波长的第二偏振态光，并透射或反射除第一波长外的波长的光；
转换器，所述转换器包括基底，所述基底上形成有反射层和转换层，所述反射层用于反射经所述转换层处理的光并导向所述合光元件，转换层包括波长转换区和偏振转换区，所述波长转换区用于对经所述合光元件透射或反射至所述转换器的第一波长的第一偏振态光进行波长转换，所述偏振转换区用于对经所述合光元件透射或反射至所述转换器的第一波长的第一偏振态光的偏振方向进行转换，将第一偏振态转换为第二偏振态。
在一种可能的实现方式中，所述分光滤光膜包括偏振分光膜和滤光膜，其中，所述偏振分光膜用于反射或透射入射至所述合光元件的第一波长的第一偏振态 光，而透射或反射入射至所述合光元件的第一波长的第二偏振态光，并透射除第一波长外的波长的光；所述滤光膜用于透射第一波长的光，并透射或反射经所述转换器的所述波长转换区转换后的光以进行合光。
偏振分光膜和滤光膜既可以设置在透明基底的同一面，也可以分别设置在透明基底的两个面。当偏振分光膜和滤光膜设置在透明基底的同一面时，可将这两层合并成一层。
在一种可能的实现方式中，所述滤光膜还用于反射或透射入射至所述合光元件的第二波长的光以进行合光。通过引入第二波长的光与第一波长的光和经转换器的波长转换区转换后的光进行合光，以合成所需光色。
在一种可能的实现方式中，所述波长转换区包括波长转换区一和波长转换区二，所述波长转换区一用于将第一波长的光转换为第三波长的光，所述波长转换区二用于将第一波长的光转换为第四波长的光。波长转换区的波长转换区一和波长转换区二将第一波长的光转换为两种不同波长的光，进而与第一波长的光合成所需光色，投影设备中可以只采用一个光源，节约成本。
在一种可能的实现方式中，所述波长转换区用于将第一波长的光转换为第五波长的光。
在一种可能的实现方式中，第一波长的光为蓝光。
在一种可能的实现方式中，第二波长的光为红光或绿光。
在一种可能的实现方式中，第三波长的光和第四波长的光的光色不同并在红光和绿光中选择。
在一种可能的实现方式中，第五波长的光为红光、绿光或黄光。
在一种可能的实现方式中，所述波长转换区内设置有波长转换材料，所述偏振转换区内设置有四分之一波片或旋光片。
在一种可能的实现方式中，所述第一波长的第一偏振态光为具有线偏振或近似线偏振的偏振光。
在一种可能的实现方式中，所述转换器还包括：驱动装置，用于驱动所述转换器按照预定的周期旋转；连接线，所述连接线将所述驱动装置电连接至外部电源。
在一种可能的实现方式中，还包括：扩散片，所述第一波长的第一偏振态光 经所述扩散片处理后入射到所述合光元件。
在一种可能的实现方式中，还包括：透镜系统一，所述透镜系统一设置在所述合光元件与所述转换器之间，用于对所述转换器的入射光和出射光进行准直和/或汇聚整形。
在一种可能的实现方式中，还包括：透镜系统二，所述第二波长的光经所述透镜系统二准直整形后入射到所述合光元件。
第二方面，本发明提供一种投影设备，包括：第一光源，用于产生第一波长的第一偏振态光，作为混合光源系统中的合光元件的入射光；混合光源系统，所述混合光源系统为第一方面及第一方面可能的实现方式中任一项所述的混合光源系统。
在一种可能的实现方式中，还包括：第二光源，用于产生第二波长的光，所述第二波长的光经所述混合光源系统中的合光元件反射或透射以进行合光。
在一种可能的实现方式中，所述第一光源为激光光源，用于产生线偏振或近似线偏振的所述第一波长的第一偏振态光。
本发明提供的混合光源系统，如激光-荧光混合光源系统，利用激光的偏振特性及合光元件特殊的膜层，实现几种光色的合光；且整个光路构造简单，体积紧凑，实用价值高。
附图说明
通过结合附图对本发明实施例进行更详细的描述，本发明的上述以及其它目的、特征和优势将变得更加明显。附图用来提供对本发明实施例的进一步理解，并且构成说明书的一部分，与本发明实施例一起用于解释本发明，并不构成对本发明的限制。在附图中，相同的参考标号通常代表相同部件或步骤。其中：
图1A和图1B为本发明的一实施例中的混合光源系统的结构示意图；
图2为本发明的一实施例中的转换器的主视图；
图3为本发明的一实施例中的混合光源系统另一状态的结构示意图；
图4为本发明的另一实施例中的转换器的主视图。
图5为本发明的另一实施例中的混合光源系统的结构示意图；
图6为本发明的又一实施例中的混合光源系统的结构示意图。
具体实施方式
为了使本技术领域的人员更好地理解本发明中的技术方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。此外，虽然本发明中公开内容按照示范性一个或几个实例来介绍，但应理解，可以就这些公开内容的各个方面也可以单独构成一个完整技术方案。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
在本发明实施例中，“示例地”、“例如”等词用于表示作例子、例证或说明。本发明中被描述为“示例”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用示例的一词旨在以具体方式呈现概念。
除非另外定义，本发明使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本发明中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而是仅用于区分描述。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。术语“和/或”包括一个或多个相关联的所列项目的任何和所有组合。
为了彻底理解本发明，将在下面提供详细的描述，以便阐释本发明的技术方案。本发明的较佳实施例详细描述如下，然而除了这些详细描述外，本发明还可以具有其他实施方式。
图1A和图1B为本发明的一实施例中的混合光源系统的结构示意图。如图1A和图1B所示，混合光源系统包括：合光元件1和转换器2，合光元件1包括透明基底11，透明基底11上形成有分光滤光膜12，分光滤光膜12既可以设置在透明基底11的光束入射面，也可以设置在透明基底11的光束出射面。分光滤光膜12用于对入射至合光元件1的第一波长的偏振光进行偏振分光，反射/透射第一偏振态而透射/反射第二偏振态，并透射/反射除第一波长外的波长的光；转换器2包括基底21，基底21上形成有反射层22和转换层23，转换层23包括波 长转换区231和偏振转换区232，如图2所示，所述波长转换区231用于对经所述合光元件1透射或反射至所述转换器2的第一波长的偏振光进行波长转换，所述偏振转换区232用于对经所述合光元件1透射或反射至所述转换器2的第一波长的偏振光的偏振方向进行转换，将第一偏振态转换为第二偏振态，或将第二偏振态转换为第一偏振态。
在一些实施例中，分光滤光膜12包括偏振分光膜121和滤光膜122，如图5和图6所示。偏振分光膜121用于对入射至合光元件1的第一波长的偏振光进行偏振分光，反射/透射第一偏振态而透射/反射第二偏振态，并透射除第一波长外的波长的光；滤光膜122用于透射第一波长的光，并透射或反射经转换器2的波长转换区231转换后的光以进行合光，若滤光膜122是用于透射经转换器2的波长转换区231转换后的光以进行合光，则可以省去该滤光膜122，即分光滤光膜12只包括偏振分光膜121。滤光膜122还可以用于反射或透射入射至所述合光元件的第二波长的光以进行合光。
偏振分光膜121和滤光膜122可以设置在透明基底11的同一面，也可以分别设置在透明基底11相对的两个面。当偏振分光膜121和滤光膜122设置在透明基底11的同一面时，可以是分别具有各自功能的偏振分光膜和滤光膜，也可以是具有偏振分光膜和滤光膜两者的功能的分光滤光膜，即，可在透明基底11的某一面先镀上偏振分光膜，再镀上滤光膜，或先镀上滤光膜，再镀上偏振分光膜，两者的顺序不做限制，也可以在透明基底11的某一面直接镀上能实现偏振分光膜121和滤光膜122两者的功能的分光滤光膜；当偏振分光膜121和滤光膜122设置在透明基底11两个面时，可以是偏振分光膜121设置在透明基底11的光束入射面，滤光膜122设置在透明基底11的光束出射面，也可以是偏振分光膜121设置在透明基底11的光束出射面，滤光膜122设置在透明基底11的光束入射面，本发明对此不做限制。
需要说明的是，偏振分光膜121是特定波长偏振分光膜，它只对第一波长的偏振光进行偏振分光，如透射P偏振态的第一波长的光而反射S偏振态的第一波长的光，对于除第一波长外的其他波长的光，无论是P偏振态还是S偏振态，均进行透射。转换层23中的偏振转换区232可以将线偏振光转成圆偏振光，同时也可以将圆偏振光转成线偏振光，例如S偏振态的第一波长的光往返经过两次偏 振转换区232后，变成P偏振态，可以透过合光元件1，例如，偏振转换区232内设置有四分之一波片、旋光片或同等功能的材料，该四分之一波片或旋光片等材料固定在基底21上。
示例性地，假设第一波长的光以第一偏振态入射至合光元件1，第一偏振态为S偏振态，第二偏振态为P偏振态。第一波长的光经合光元件1反射后入射至转换器2，当第一波长的光入射到偏振转换区232后，被偏振转换区232下面的反射层22反射，往返经过两次偏振转换区232，其偏振态由第一偏振态转换成第二偏振态。第二偏振态的第一波长的光可以透过合光元件1。当第一波长的光入射到波长转换区231后，产生第五波长的光，如图3所示。第五波长的光被反射层22反射后透过合光元件1。最后，透过合光元件1的第一波长的光与第五波长的光进行合光，形成所需光色。若第一波长的光为蓝光，波长转换区231内设置的为黄光转换材料，则第五波长的光为黄光，黄光与蓝光合成白光。
在一些实施例中，转换器2的基底21可以为圆形基板，波长转换区231和偏振转换区232在圆形基板的周向上设置，在圆形基板上形成扇环形、半环形等，如图2和图4所示。转换器2还可以包括驱动装置24和连接线(图中未示出)，驱动装置24用于驱动所述转换器按照预定的周期旋转，连接线将驱动装置24电连接至外部电源。
基底21可以是透明的，也可以是不透明的，如由铜、铝等形成的金属基材，通过银蒸镀等方式对基底21进行加工，在基底21的表面形成反射层22和转换层23中的波长转换区231。通过在基底21上设置任意的能够改变偏振方向的材料或元件形成偏振转换区232，如1/4波片，1/4波片通过粘贴等方式固定在基底21上。若基底21是透明的，则反射层22和转换层23可以位于基底21的同一侧，也可以分别位于基底21的两侧，转换器2的入射光经转换层23处理后再经反射层22反射。若基底21是不透明的，则反射层22和转换层23位于基底21的光束入射面，且反射层22位于转换层23和基底21的中间。
在一些实施例中，如图4所示，波长转换区231包括波长转换区一2311和波长转换区二2312，所述波长转换区一2311用于将第一波长的光转换为第三波长的光，所述波长转换区二2312用于将第一波长的光转换为第四波长的光。在该实施例中，第一波长的光、第三波长的光和第四波长的光进行合光以形成所需 光色。示例性地，若第一波长的光为蓝光，波长转换区一2311和波长转换区二2312内分别设置有绿光转换材料和红光转换材料，则最终蓝光、红光和绿光合成白光。
图5为本发明的另一实施例中的混合光源系统的结构示意图。如图5所示，混合光源系统包括合光元件1和转换器2。与图1所示实施例不同的是，合光元件1的透明基底11上的分光滤光膜12包括偏振分光膜121和滤光膜122，偏振分光膜121和滤光膜122分别设置在透明基底11相对的两个面，滤光膜122的作用是透射第一波长的光，并透射经所述转换器的所述波长转换区转换后的光以进行合光。若经滤光膜122透射的第一波长的光与经转换器2的波长转换区231转换后的光不能合成所需光色，则可引入第二波长的光，利用合光元件1的滤光膜122对第二波长的光反射以与第一波长的光和经转换器2的波长转换区231转换后的光合成所需颜色的光。
示例性地，假设所需颜色的光为白光，第一波长的光为蓝光，波长转换区231内设置的波长转换材料为绿光转换材料，如绿色荧光粉，则第五波长的光为绿光，则透过合光元件1的绿光和蓝光不能合成白光，则可引入红光，红光经合光元件1的滤光膜122反射与绿光和蓝光进行合光，可以合成白光。若波长转换区231内设置的波长转换材料为红光转换材料，如红色荧光粉，则第五波长的光为红光，则引入的光可为绿光，绿光经合光元件1的滤光膜122反射与红光和蓝光进行合光，可以合成白光。
本实施例中的其他部分与图1所示的实施例类似，在此不再赘述。
图6为本发明的又一实施例中的混合光源系统的结构示意图。如图6所示，混合光源系统包括：合光元件1、转换器2、扩散片3、透镜系统4和透镜系统5。第一光源01产生第一波长的偏振光，作为合光元件1的入射光，优选地，第一光源01为激光光源，用于产生线偏振或近似线偏振的第一波长的偏振光。第二光源02产生第二波长的光，第二波长的光经合光元件1的滤光膜122反射或透射以进行合光。扩散片3位于第一光源01与合光元件1之间，第一光源01产生的激光先经过扩散片3进行匀化，避免高功率密度对荧光粉层的损伤。透镜系统4设置在合光元件1与转换器2之间，用于对转换器2的入射光和出射光进行准直和/或汇聚整形。透镜系统5设置在第二光源02与合光元件1之间，用于对第 二波长的光进行准直整形。
本实施例中的其他部分与图5所示的实施例类似，在此不再赘述。
本发明实施例还提供一种投影设备，包括上述实施例涉及的混合光源系统，投影设备中还包括其他组件，如投影镜头等，这些组件的设置可参见相关技术，在此不再赘述。
在本发明实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种混合光源系统，其特征在于，包括：
    合光元件，所述合光元件包括透明基底，所述透明基底上形成有分光滤光膜，所述分光滤光膜用于反射或透射入射至所述合光元件的第一波长的第一偏振态光，而透射或反射入射至所述合光元件的第一波长的第二偏振态光，并透射或反射除第一波长外的波长的光；
    转换器，所述转换器包括基底，所述基底上形成有反射层和转换层，所述反射层用于反射经所述转换层处理的光并导向所述合光元件，转换层包括波长转换区和偏振转换区，所述波长转换区用于对经所述合光元件透射或反射至所述转换器的第一波长的第一偏振态光进行波长转换，所述偏振转换区用于对经所述合光元件透射或反射至所述转换器的第一波长的第一偏振态光的偏振方向进行转换，将第一偏振态转换为第二偏振态。
  2. 根据权利要求1所述的一种混合光源系统，其特征在于，所述分光滤光膜包括偏振分光膜和滤光膜，其中，
    所述偏振分光膜用于反射或透射入射至所述合光元件的第一波长的第一偏振态光，而透射或反射入射至所述合光元件的第一波长的第二偏振态光，并透射除第一波长外的波长的光；
    所述滤光膜用于透射第一波长的光，并透射或反射经所述转换器的所述波长转换区转换后的光以进行合光。
  3. 根据权利要求2所述的一种混合光源系统，其特征在于，所述滤光膜还用于反射或透射入射至所述合光元件的第二波长的光以进行合光。
  4. 根据权利要求1所述的一种混合光源系统，其特征在于，所述波长转换区包括波长转换区一和波长转换区二，所述波长转换区一用于将第一波长的光转换为第三波长的光，所述波长转换区二用于将第一波长的光转换为第四波长的光。
  5. 根据权利要求1所述的一种混合光源系统，其特征在于，所述波长转换区用于将第一波长的光转换为第五波长的光。
  6. 根据权利要求1-5中任一项所述的一种混合光源系统，其特征在于，第一波长的光为蓝光。
  7. 根据权利要求3所述的一种混合光源系统，其特征在于，第二波长的光为红光或绿光。
  8. 根据权利要求4所述的一种混合光源系统，其特征在于，第三波长的光和第四波长的光的光色不同并在红光和绿光中选择。
  9. 根据权利要求5所述的一种混合光源系统，其特征在于，第五波长的光为红光、绿光或黄光。
  10. 根据权利要求1所述的一种混合光源系统，其特征在于，所述波长转换区内设置有波长转换材料，所述偏振转换区内设置有四分之一波片或旋光片。
  11. 根据权利要求1所述的一种混合光源系统，其特征在于，所述第一波长的第一偏振态光为具有线偏振或近似线偏振的偏振光。
  12. 根据权利要求1所述的一种混合光源系统，其特征在于，所述转换器还包括：
    驱动装置，用于驱动所述转换器按照预定的周期旋转；
    连接线，所述连接线将所述驱动装置电连接至外部电源。
  13. 根据权利要求1所述的一种混合光源系统，其特征在于，还包括：
    扩散片，所述第一波长的第一偏振态光经所述扩散片处理后入射到所述合光元件。
  14. 根据权利要求1所述的一种混合光源系统，其特征在于，还包括：
    透镜系统一，所述透镜系统一设置在所述合光元件与所述转换器之间，用于对所述转换器的入射光和出射光进行准直和/或汇聚整形。
  15. 根据权利要求3所述的一种混合光源系统，其特征在于，还包括：
    透镜系统二，所述第二波长的光经所述透镜系统二准直整形后入射到所述合光元件。
  16. 一种投影设备，其特征在于，包括：
    第一光源，用于产生第一波长的第一偏振态光，作为混合光源系统中的合光元件的入射光；
    混合光源系统，所述混合光源系统为权利要求1-15中任一项所述的混合光源系统。
  17. 根据权利要求16所述的一种投影设备，其特征在于，还包括：
    第二光源，用于产生第二波长的光，所述第二波长的光经所述混合光源系统中的合光元件反射或透射以进行合光。
  18. 根据权利要求16所述的一种投影设备，其特征在于，所述第一光源为激光光源，用于产生线偏振或近似线偏振的所述第一波长的第一偏振态光。
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