WO2022143318A1 - Dispositif électroluminescent - Google Patents

Dispositif électroluminescent Download PDF

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Publication number
WO2022143318A1
WO2022143318A1 PCT/CN2021/140269 CN2021140269W WO2022143318A1 WO 2022143318 A1 WO2022143318 A1 WO 2022143318A1 CN 2021140269 W CN2021140269 W CN 2021140269W WO 2022143318 A1 WO2022143318 A1 WO 2022143318A1
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Prior art keywords
light
wavelength band
optical system
optical path
light source
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PCT/CN2021/140269
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English (en)
Chinese (zh)
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万民
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万民
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Publication of WO2022143318A1 publication Critical patent/WO2022143318A1/fr

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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
    • 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
    • F21V9/14—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing polarised light
    • 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
    • F21V9/20—Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
    • 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
    • F21V9/38—Combination of two or more photoluminescent elements of different materials

Definitions

  • the blue light of the S-polarized light reflected by the polarizing beam splitter 203 is directed to the lens group 204 , and the blue light of the P-polarized light transmitted through the polarizing beam splitter 203 is directed to the quarter-wave plate 206 .
  • the lens group 204 converges the blue light of the S-polarized light toward the wavelength conversion device 205.
  • the wavelength conversion device 205 is reflective and includes a reflective layer 205a and a wavelength conversion layer 205b (eg, a yellow phosphor layer) disposed on the reflective layer 205a, The wavelength conversion device 205 converts the blue light of the S-polarized light into yellow light and sends it to the lens group 204.
  • the wavelength conversion device is reflective, which can be static or dynamic:
  • the static wavelength conversion device includes a reflective layer and a wavelength conversion layer disposed on the reflective layer, wherein the wavelength conversion layer absorbs the incident light in the first wavelength band and emits light in the third wavelength band after being excited.
  • the first collimating element is integrated in the first laser or disposed outside the first laser, and is used for collimating the light of the first wavelength band emitted by the first laser.
  • the first collimating element can be integrated inside the first laser, and when the first laser used is not integrated with the first collimating element, the first collimating element can also be added outside the first laser (eg: collimating lens), used for collimating the light emitted by the first laser.
  • the second uniform light optical system is located on the optical path from the second light source to the first light path adjustment device, and is used for uniform light emitted by the second light source. the light of the second wavelength band.
  • a light guide optical system is also included, the light guide optical system is located on the light path from the second light source to the first light path adjusting device, and is used to guide the light emitted from the second light source at least in part.
  • the light of the second wavelength band passes through or transmits through the transmission region of the reflection element and then enters the first optical path adjusting device.
  • the third collection optical system may be composed of a lens, a lens group, a compound parabolic concentrator or a tapered light guide column alone, or may be composed of any combination of the above-mentioned optical elements.
  • the second light path adjusting device receives the light of the second wavelength band emitted by the second light source, and makes it at least partially transmit or at least partially reflect;
  • the wavelength conversion device receives the light of the first wavelength band transmitted through the dichroic mirror, and converts it into converted into light in a third wavelength band different from both the first wavelength band and the second wavelength band; the dichroic mirror reflects the light in the third wavelength band from the wavelength conversion device; the dichroic mirror a mirror transmits the light of the second wavelength band from the second optical path adjusting device;
  • the polarization conversion element is located on the optical path between the second optical path adjustment device and the first scattering optical system, and is used to make the second optical path adjustment device emit light toward the When the light of the second wavelength band of the first scattering optical system is reflected by the first scattering optical system and returns to the second optical path adjusting device, its polarization direction or polarization state is changed.
  • the first light source includes N first lasers and N first collimating elements corresponding to the N first lasers, N ⁇ 1, where:
  • the first scattering optical system is composed of a first reflective scattering plate, or a first transmissive scattering plate and a first reflecting mirror.
  • the first reflective diffuser plate may be static or a dynamic rotatable first reflective diffuser plate.
  • the second uniform light optical system may be composed of a diffuser, an optical integrator or at least one fly-eye lens array, wherein the optical integrator may be solid or hollow.
  • the diffusing sheet since the use of the diffusing sheet will diffuse the light of the second wavelength band emitted by the second light source, a light path from the second light source to the diffusing sheet or on the optical path from the diffusing sheet to the second optical path adjusting device can be arranged
  • the positive lens is used for converging the light of the second wavelength band emitted from the second light source to the second optical path adjusting device.
  • a condensing optical system is also included for condensing the light emitted from the dichroic mirror.
  • a second lens group is also included, the second lens group is located on the light path from the second light source to the second light path adjusting device, and is used for reducing the second light source emitted by the second light source.
  • a beam of light in a wavelength band is also included, the second lens group is located on the light path from the second light source to the second light path adjusting device, and is used for reducing the second light source emitted by the second light source.
  • the second reflective diffuser plate may be static or a dynamic rotatable second reflective diffuser plate.
  • Those skilled in the art can also set a heat sink for heat dissipation of the first light source and/or the second light source and/or the wavelength conversion device as required.
  • the first scattering optical system by using the first scattering optical system, the light mixing effect of the outgoing light can be improved.
  • the first light source and the second light source are independent of each other, so that the color temperature of the light emitted by the light-emitting device can be freely adjusted by adjusting the power of the first light source and the second light source independently, and the light-emitting device will not be affected.
  • luminous flux output At the same time, a laser capable of emitting light of different dominant wavelengths can be used in the second light source to expand the spectrum of the blue light band, thereby improving the color rendering index of the emitted light of the light-emitting device.
  • the light emitted by the first light source in the present invention is all used to excite the wavelength conversion device.
  • the light-emitting device provided in the present invention can achieve more efficient etendue without increasing the etendue.
  • the luminous flux output of the light-emitting device can be further improved without affecting the etendue of the light-emitting device.
  • FIG. 1 is a schematic structural diagram of an existing light-emitting device using a dichroic mirror
  • Fig. 4 and Fig. 5 illustrate the dynamic wavelength conversion device of two different structural forms
  • FIG. 13 is a schematic structural diagram of a light-emitting device disclosed in Embodiment 8.
  • Embodiment 24 is a schematic structural diagram of a light-emitting device disclosed in Embodiment 19;
  • Embodiment 1 The difference between this embodiment and Embodiment 1 is that when the blue light emitted by the second light source 1702 is incident on the flat-type polarizing beam splitter 1706, the blue light contains S-polarized light components and P-polarized light components, and the flat-type polarizing beam splitter 1706 separates the The blue light of S-polarized light and the blue light of P-polarized light are separated, and the blue light of S-polarized light therein is reflected and the blue light of P-polarized light therein is transmitted.
  • the second light source 1802 includes a plurality of lasers 1802a and a plurality of collimating lenses 1802b corresponding to the plurality of lasers 1802a one-to-one, wherein the laser 1802a emits blue light with a dominant wavelength of 455 nm.
  • the first collection optical system consists of a lens group 1804 including a lens 1804a and a lens 1804b.
  • the wavelength conversion device 1805 includes a reflective layer 1805a and a wavelength conversion layer 1805b provided on the reflective layer 1805a.
  • the second optical path adjusting device is a flat-plate polarizing beam splitter 1806 .
  • the polarization conversion element is a quarter wave plate 1807 .
  • the first light source 2201 in this embodiment includes several lasers 2201a, several collimating lenses 2201b, several lasers 2201c, and several lasers 2201a corresponding to one-to-one lasers 2201a.
  • Several collimating lenses 2201d and polarization selecting elements 2201e correspond to several lasers 2201c one-to-one.
  • the laser 2201a emits S-polarized blue light and is incident on one side of the polarization selection element 2201e
  • the laser 2201c emits P-polarized blue light and is incident on the other side of the polarization selection element 2201e.
  • the characteristic of the polarization selection element 2201e is to reflect blue light of S-polarized light and transmit blue light of P-polarized light.
  • the blue light of the S-polarized light emitted by the laser 2201a and the blue light of the P-polarized light emitted by the laser 2201c are combined into one light by the polarization selection element 2201e.
  • the first light source 2201 in this embodiment can emit more blue light without affecting the etendue of the light-emitting device, so that more yellow light can be obtained after the wavelength conversion device 2205 is excited. .
  • a light-emitting device disclosed in this embodiment includes a first light source 2301, a second light source 2302 (composed of several lasers 2302a and several collimating lenses 2302b corresponding to the several lasers 2302a one-to-one), A dichroic mirror 2303, a first collection optical system (consisting of a lens group 2304 including a lens 2304a and a lens 2304b), a wavelength conversion device 2305 (including a reflective layer 2305a and a wavelength conversion layer 2305b disposed on the reflective layer 2305a), a second Two optical path adjustment devices (composed of a flat-plate polarizing beam splitter 2306), polarization conversion elements (composed of a quarter-wave plate 2307), and a second collection optical system (composed of a lens group 2308 including a lens 2308a and a lens 2308b) ), a first scattering optical system (composed of a reflective diffusion plate 2309), and a condensing optical system (composed of
  • the first light source 2301 in this embodiment includes several lasers 2301a, several collimating lenses 2301b, several lasers 2301c, and several lasers 2301a corresponding to one-to-one lasers 2301a.
  • Several collimating lenses 2301d, polarization selecting elements 2301e, and reflecting mirrors 2301f are in one-to-one correspondence with several lasers 2301c.
  • the laser 2301a emits S-polarized blue light and is reflected by the mirror 2301f and then incident on one side of the polarization selection element 2301e, and the laser 2301c emits P-polarized blue light and is incident on the other side of the polarization selection element 2301e.
  • a light-emitting device disclosed in this embodiment includes a first light source 2501 (composed of several lasers 2501a and several collimating lenses 2501b corresponding to several lasers 2501a one-to-one), a second light source 2502 ( It consists of several lasers 2502a and several collimating lenses 2502b corresponding to several lasers 2502a one-to-one), a dichroic mirror 2503, a first collection optical system (composed of a lens group 2504 including a lens 2504a and a lens 2504b), The wavelength conversion device 2505 (including the reflective layer 2505a and the wavelength conversion layer 2505b provided on the reflective layer 2505a), the second optical path adjustment device (composed of a flat-plate polarizing beam splitter 2506), the polarization conversion element (composed of a quarter wave plate 2507), a second collecting optical system (consisting of a lens group 2508 including a lens 2508a and a lens 2508b), a first scattering optical system
  • a light-emitting device disclosed in this embodiment includes a first light source 2601 (composed of several lasers 2601a and several collimating lenses 2601b corresponding to the several lasers 2601a one-to-one), a second light source 2602 ( It consists of several lasers 2602a and several collimating lenses 2602b corresponding to several lasers 2602a one-to-one), a dichroic mirror 2603, a first collection optical system (composed of a lens group 2604 including a lens 2604a and a lens 2604b), The wavelength conversion device 2605 (including the reflective layer 2605a and the wavelength conversion layer 2605b provided on the reflective layer 2605a), the second optical path adjustment device (composed of a flat-plate polarizing beam splitter 2606), the polarization conversion element (composed of a quarter wave plate 2607), a second collecting optical system (consisting of a lens group 2608 including a lens 2608a and a lens 2608b), a first scattering
  • the second light source 2602 emits the blue light of S-polarized light and emits it to the flat-type polarizing beam splitter 2606
  • the characteristic of the flat-type polarizing beam splitter 2606 is to reflect the blue light of S-polarized light and make P-polarized light.
  • the blue light of the light is transmitted, and the flat-plate polarizing beam splitter 2606 reflects the blue light of the S-polarized light emitted from the second light source 2602 to the quarter-wave plate 2607 .
  • the characteristics of the dichroic mirror 2703 in this embodiment are to reflect blue light and transmit yellow light, and the blue light emitted by the first light source 2701 is reflected to the lens group by the dichroic mirror 2703 2704, the lens group 2704 converges the blue light from the dichroic mirror 2703 towards the wavelength conversion device 2705, and the wavelength conversion device 2705 converts the incident blue light into yellow light and sends it to the lens group 2704, and the yellow light is collected by the lens group 2704 and then emitted to the The dichroic mirror 2703 is transmitted through the dichroic mirror 2703.
  • the plate polarizing beam splitter 2806 is characterized by reflecting blue light of S-polarized light and transmitting blue light of P-polarized light.
  • the blue light of the P-polarized light is transmitted through the flat-plate polarizing beam splitter 2806 and then directed to the quarter-wave plate 2807 .
  • the blue light of the P-polarized light is transmitted through the quarter-wave plate 2807 and converted into blue light of circularly polarized light.
  • the lens group 2808 converges the blue light of the circularly polarized light toward the reflective diffuser plate 2809.
  • the reflective diffuser plate 2809 converts the incident circular
  • the blue light of polarized light is reflected, and part of the blue light reflected by the reflective scattering plate 2809 becomes blue light of unpolarized light, and the rest of the light is still blue light of circularly polarized light.
  • the blue light is collected by the lens group 2808 and then directed to the quarter-wave plate 2807 , and then transmitted through the quarter-wave plate 2807 and incident on the flat-plate polarizing beam splitter 2806 .
  • the blue light of circularly polarized light is converted into blue light of S-polarized light after being transmitted through the quarter wave plate 2807, and the blue light of these S-polarized light is reflected by the plate polarizing beam splitter 2806, while the blue light of non-polarized light is polarized by the plate type
  • the light splitter 2806 separates the blue light of S polarized light and the blue light of P polarized light, wherein the blue light of S polarized light is reflected by the flat polarized light splitter 2806, and the blue light of P polarized light is transmitted through the flat polarized light splitter 2806 and emitted. to the reflective element 2816.
  • the reflective element 2816 reflects most of the blue light from the P-polarized light from the flat-plate polarizing beam splitter 2806 and sends it back to the flat-plate polarizing beam splitter 2806, and then the P-polarized blue light is transmitted through the flat-plate polarizing beam splitter 2806 and then re-emitted. To the quarter wave plate 2807.
  • a light-emitting device disclosed in this embodiment includes a first light source 2901 (composed of several lasers 2901a and several collimating lenses 2901b corresponding to several lasers 2901a one-to-one), a second light source 2902 ( It consists of several lasers 2902a and several collimating lenses 2902b corresponding to several lasers 2902a one-to-one), a dichroic mirror 2903, a first collection optical system (composed of a lens group 2904 including a lens 2904a and a lens 2904b), The wavelength conversion device 2905 (including the reflective layer 2905a and the wavelength conversion layer 2905b disposed on the reflective layer 2905a), the second optical path adjustment device (composed of a flat-plate polarizing beam splitter 2906), the polarization conversion element (composed of a quarter wave plate 2907), second collection optical system (composed of lens group 2908 including lens 2908a and lens 2908b), first scattering optical system (composed of a reflective scattering
  • Embodiment 13 The difference between this embodiment and Embodiment 13 is that when the blue light emitted by the second light source 2902 is incident on the flat-type polarizing beam splitter 2906, the blue light contains S-polarized light components and P-polarized light components, and the flat-type polarizing beam splitter 2906 separates the S-polarized light components and P-polarized light components.
  • the blue light of S-polarized light and the blue light of P-polarized light are separated, and the blue light of S-polarized light therein is reflected and the blue light of P-polarized light therein is transmitted.
  • the traveling optical path of the blue light of the P-polarized light transmitted through the flat-type polarizing beam splitter 2906 is the same as the traveling optical path of the blue light of the P-polarized light transmitted through the flat-type polarizing beam splitter 1806 in Example 13;
  • the blue light of the S-polarized light reflected by the filter 2906 is directed to the quarter wave plate 2917.
  • the blue light of the S-polarized light is converted into blue light of circularly polarized light after being transmitted through the quarter-wave plate 2917 , and the blue light of the circularly polarized light is concentrated toward the reflective diffuser 2919 by the lens group 2918 .
  • the reflective diffusing plate 2919 reflects the incident circularly polarized blue light, and the circularly polarized blue light reflected by the reflective diffusing plate 2919 is collected by the lens group 2918 and then directed to the quarter-wave plate 2917 .
  • the blue light of circularly polarized light is transmitted through the quarter wave plate 2917 and then converted into blue light of P-polarized light, and these blue light of P-polarized light is directed to the plate-type polarization beam splitter 2906, and the plate-type polarization beam splitter 2906 transmits it.

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  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne un dispositif électroluminescent, comprenant une première source de lumière, une seconde source de lumière, un miroir dichroïque, un appareil de conversion de longueur d'onde, un premier appareil de réglage de trajet de lumière ou un second appareil de réglage de trajet de lumière, et un premier système optique de diffusion. Dans la présente invention, l'effet de mélange de lumière de lumière émergente peut être amélioré en utilisant le premier système optique de diffusion. La température de couleur de la lumière émergente du dispositif électroluminescent peut être réglée librement par réglage indépendant de la puissance de la première source de lumière et de la puissance de la seconde source de lumière. Un laser capable d'émettre de la lumière de différentes longueurs d'onde dominantes peut être utilisé dans la seconde source de lumière pour améliorer l'indice de rendu de couleur de la lumière émergente du dispositif électroluminescent. La lumière émise par la première source de lumière dans la présente invention est entièrement utilisée pour exciter l'appareil de conversion de longueur d'onde. Par rapport aux solutions techniques existantes, le dispositif électroluminescent selon la présente invention permet d'obtenir une sortie de flux lumineux supérieure dans le cas où une quantité d'expansion optique n'est pas augmentée, et si un élément de sélection de polarisation est utilisé dans la première source de lumière dans un mode de mise en correspondance, la sortie de flux lumineux du dispositif électroluminescent peut encore être améliorée.
PCT/CN2021/140269 2020-12-31 2021-12-22 Dispositif électroluminescent WO2022143318A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202011641217.2 2020-12-31
CN202023347170.7 2020-12-31
CN202011641217 2020-12-31
CN202023347170 2020-12-31

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JP7482282B1 (ja) 2022-11-22 2024-05-13 株式会社ライトショー・テクノロジー 投射型表示装置

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CN214501113U (zh) * 2020-12-31 2021-10-26 万民 一种发光设备

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EP4311980A1 (fr) * 2022-07-28 2024-01-31 Clay Paky S.R.L. Projecteur de scène
JP7482282B1 (ja) 2022-11-22 2024-05-13 株式会社ライトショー・テクノロジー 投射型表示装置

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