WO2019061854A1 - Architecture optique de dispositif de projection optique à cristaux liquides et procédé de traitement de faisceaux associé - Google Patents

Architecture optique de dispositif de projection optique à cristaux liquides et procédé de traitement de faisceaux associé Download PDF

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Publication number
WO2019061854A1
WO2019061854A1 PCT/CN2017/116245 CN2017116245W WO2019061854A1 WO 2019061854 A1 WO2019061854 A1 WO 2019061854A1 CN 2017116245 W CN2017116245 W CN 2017116245W WO 2019061854 A1 WO2019061854 A1 WO 2019061854A1
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WIPO (PCT)
Prior art keywords
liquid crystal
light
polarization direction
light beam
polarization
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PCT/CN2017/116245
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English (en)
Chinese (zh)
Inventor
何怀亮
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惠科股份有限公司
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Publication of WO2019061854A1 publication Critical patent/WO2019061854A1/fr

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Classifications

    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • 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
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's

Definitions

  • Embodiments of the present application relate to the technical field of liquid crystal optical projection devices, and in particular to an optical architecture of a liquid crystal optical projection device and a beam processing method thereof.
  • a beam or an electromagnetic wave is generally unpolarized, and its direction of intensity change is not fixed.
  • the direction of the intensity change is also referred to as the direction of the beam or the direction of polarization.
  • the beam has different polarization directions between different turns, and the vector corresponding to any polarization direction can be represented by two vertical vectors.
  • a conventional liquid crystal optical projection device such as a liquid crystal light valve projector, mainly uses a liquid crystal to deflect a light beam of a specific polarization direction, and then takes out the deflected light beam at a specific polarization. The energy of the direction to achieve the purpose of the display.
  • a light beam entering a liquid crystal must have a specific polarization direction (for example, a P polarization direction), and a beam of such a specific polarization direction is deflected after passing through the liquid crystal.
  • the light beam wherein the degree to which the light beam is deflected depends on the voltage applied to the liquid crystal, and the voltage applied to the liquid crystal depends on the gray scale value of the corresponding pixel.
  • the deflected light beam enters the polarization beam splitting device, wherein the light beam in the first polarization direction (for example, the P polarization direction) of the deflected light beam is reflected by the polarization beam splitting device and enters the projector lens, and is The beam of the deflected beam in the second polarization direction (for example, the S polarization direction) directly penetrates the polarization beam splitter.
  • the polarization direction of the light beam entering the liquid crystal is changed by the voltage applied to the liquid crystal to be equivalent to the brightness at which the corresponding pixel displays its gray scale value.
  • the brightness (energy) of the deflected light beam is smaller than the brightness (energy) of the light beam entering the liquid crystal, so that the brightness of the existing liquid crystal optical valve projector may not be strong enough, and the brightness (energy) of the light source needs to be strengthened.
  • the light beam generated by the light source does not have a specific polarization direction, that is, an unpolarized light beam, so the unpolarized square beam needs to pass through the polarized beam splitting device, and the unpolarized beam
  • the light beam in a specific polarization direction of the light beam is resolved and sent to the liquid crystal. Therefore, the portion of the unpolarized beam that is not in the specific polarization direction and the portion of the second polarization direction of the deflected beam are the ones in the liquid crystal optical valve projector
  • the components absorb and generate heat, causing the liquid crystal optical valve projector to be damaged or deteriorated due to overheating. Moreover, these thermal energy cannot be effectively recycled and utilized, thus causing energy waste technical problems.
  • the technical problem to be solved by the embodiments of the present application is to provide an optical architecture of a liquid crystal optical projection device for recovering beam energy that is not used for projection, avoiding waste of energy and causing overheating of the liquid crystal optical projection device.
  • a technical problem to be further solved by the embodiments of the present application is to provide a beam processing method for an optical architecture of a liquid crystal optical projection device, to recover energy of a beam that is not used for projection, to avoid energy waste, and to cause a liquid crystal optical projection device. overheat.
  • the embodiment of the present application first provides an optical architecture of a liquid crystal optical projection device, including:
  • At least one first polarization beam splitting device configured to resolve at least one first incident beam into at least one first beam and a second polarization direction in the first polarization direction;
  • At least one first liquid crystal for deflecting the at least one first light beam
  • At least one second liquid crystal for deflecting the at least one second light beam, wherein a sum of angles at which the at least one first light beam and the at least one second light beam are deflected is 90 degrees;
  • an optical combiner for combining the at least one first light beam and the at least one second light beam
  • a second polarization splitting device configured to resolve the merged at least one first light beam and the at least one second light beam into a third light beam in the first polarization direction and the second polarization direction Fourth beam;
  • a projector lens for receiving the third light beam.
  • the optical architecture further includes:
  • a color splitter for dividing the second incident beam into a plurality of first incident beams of different colors.
  • the color splitter is a multi-color splitter
  • the at least one first polarization splitting device is a first red polarized light splitting device, a first green polarized light splitting device and a first blue a polarizing beam splitting device
  • the at least one first liquid crystal is a first red light liquid crystal, a first green light liquid crystal and a first blue light liquid crystal
  • the at least one second liquid crystal is a second red light liquid crystal and a second green light liquid crystal with a second blue light liquid crystal.
  • the optical architecture further includes:
  • a photoelectric converter for receiving the fourth light beam and photoelectrically converting the same
  • the electrical energy storage device is configured to store the converted electrical energy.
  • first polarization direction is a horizontal polarization direction (P polarization direction)
  • second polarization direction is a vertical polarization direction (S polarization direction).
  • the voltage applied to the at least one first and second liquid crystals is related to a grayscale value of the corresponding pixel.
  • the photoelectric converter is a solar panel.
  • the at least one first incident light beam is an unpolarized light beam.
  • an embodiment of the present application further provides an optical architecture of a liquid crystal optical projection device, including:
  • At least one first polarization splitting device configured to resolve at least one first incident beam into at least one first beam and a second polarization direction of the second polarization direction;
  • At least one first liquid crystal for deflecting the at least one first light beam
  • At least one second liquid crystal for deflecting the at least one second light beam, wherein a sum of angles at which the at least one first light beam and the at least one second light beam are deflected is 90 degrees;
  • an optical combiner for combining the at least one first light beam and the at least one second light beam
  • a second polarization splitting device configured to resolve the merged at least one first light beam and the at least one second light beam into a third light beam in the first polarization direction and the second polarization direction Fourth beam
  • a projector lens for receiving the third light beam
  • a multi-color beam splitter configured to divide the second incident beam into a plurality of first incident beams of different colors, wherein the at least one first polarization splitting device is a first red polarizing beam splitting device, and the first green pole And the first blue liquid crystal is the first red liquid crystal, the first green liquid crystal and the first blue light liquid crystal, and the at least one second liquid crystal is the second red a light liquid crystal, a second green light liquid crystal and a second blue light liquid crystal;
  • the electrical energy storage device is configured to store the converted electrical energy of the fourth beam.
  • the first polarization direction is a horizontal polarization direction (P polarization direction)
  • the second polarization direction is a vertical polarization direction (S polarization direction).
  • the voltage applied to the at least one first and second liquid crystal devices is related to a grayscale value of the corresponding pixel
  • the optical architecture further comprises: a solar panel for receiving the fourth light beam and photoelectrically converting the same.
  • an embodiment of the present application further provides a beam processing method for an optical architecture of a liquid crystal optical projection device, including:
  • the beam processing method further includes:
  • the photoelectric converter is a solar panel.
  • the first polarization direction is a horizontal polarization direction (P polarization direction)
  • the second polarization direction is a vertical polarization direction (S polarization direction).
  • the beam processing method further comprises: applying, by the voltage related to the grayscale value of the corresponding pixel, to the at least one first and second liquid crystal devices.
  • the at least one first incident light beam is an unpolarized light beam.
  • the first incident beam is split into a plurality of the first incident beams of different colors by using a multi-color beam splitter, wherein the at least one first polarization beam splitting device is a first red polarization a light splitting device, a first green polarizing beam splitting device and a first blue polarizing beam splitting device, wherein the at least one first liquid crystal device is a first red light liquid crystal device, a first green light liquid crystal device and a first blue light liquid crystal device, The at least one second liquid crystal device is a second red light liquid crystal device, a second green light liquid crystal device and a second blue light liquid crystal device.
  • the at least one first polarization beam splitting device is a first red polarization a light splitting device, a first green polarizing beam splitting device and a first blue polarizing beam splitting device
  • the at least one first liquid crystal device is a first red light liquid crystal device, a first green light liquid crystal device and a first blue light liquid crystal device
  • the at least one second liquid crystal device is a second red
  • the embodiment of the present application has at least the following beneficial effects:
  • the optical architecture of the liquid crystal optical projection device provided by the embodiment of the present application and the beam processing method thereof can recover the light beam not used for projection, and convert into Electrical energy storage, to avoid waste of energy, to enhance light source and overheating problems; and to be easy to implement without the need for complex and / or sophisticated optical components, so has the advantage of low cost.
  • FIG. 1 is a schematic diagram showing the polarization direction of an unpolarized beam or an electromagnetic wave as it progresses.
  • FIG. 2 is a schematic diagram of an optical architecture in a liquid crystal optical projection device of an embodiment of the present application.
  • FIG. 3 is a flow chart of a beam processing method in an optical architecture for a liquid crystal optical projection device according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an optical architecture in a liquid crystal optical projection device of an embodiment of the present application.
  • FIG. 5 is a schematic diagram of two pairs of liquid crystals in the first embodiment of the present invention deflecting a light beam in a first polarization direction and a light beam in a second polarization direction.
  • FIG. 6 is a flow chart of a beam processing method in an optical architecture for a liquid crystal optical projection device according to an embodiment of the present application.
  • FIG. 1 is a schematic diagram showing the change of the polarization direction of an unpolarized beam or an electromagnetic wave as it progresses.
  • the beams have different polarization directions between different turns, which can be in the vectors POL1 ⁇ POL8, respectively.
  • FIG. 2 is a schematic diagram of an optical architecture in a liquid crystal optical projection device according to an embodiment of the present application.
  • the liquid crystal optical projection device 3 may be a liquid crystal optical valve projector, but the present application is not limited thereto.
  • the optical architecture of the liquid crystal optical projection device 3 includes polarization beam splitting devices 31, 35, R/G/B beam splitter 32, liquid crystals 33R, 33G, 33B, optical combiner 34, projector lens 36, photoelectric converter 37, and electrical energy storage. Device 38.
  • the light source of the liquid crystal optical projection device 3 (not shown) provides an unpolarized light beam Bl, and the unpolarized light beam B1 is a collimated light beam and enters the polarization beam splitting device 31.
  • the beam B2 of the first polarization direction (P polarization direction) in the beam B1 directly penetrates the polarization beam splitter 31, and the beam B3 of the second polarization direction (S polarization direction) of the beam B1 is poled
  • the spectroscopic device 31 reflects. Beam B3 then enters a multi-color beam splitter, which is optionally a red/green/blue (R/G/B) beam splitter 32.
  • the R/G/B beam splitter 32 separates the red beam B4, the green beam B5, and the blue beam B6 in the beam B3.
  • the red beam B4, the green beam B5 and the blue beam B6 then enter the liquid crystals 33R, 33G and 33B, respectively.
  • the liquid crystals 33R, 33G, and 33B are respectively applied with voltages according to the gray scale values of the corresponding pixels to respectively deflect the red light beam B4, the green light beam B5, and the blue light beam B6, wherein the red light beam B4, the green light beam B5, and the blue light beam B6 are deflected.
  • the generated red light beam B7, green light beam B8, and blue light beam B9 have not only the portion in the first polarization direction but also the portion in the second polarization direction.
  • the red light beam B7, the green light beam B8 and the blue light beam B9 enter the light combiner 34, and the light combiner 34 combines the red light beam B7, the green light beam B8 and the blue light beam B9 to generate the light beam B10.
  • the beam B 10 enters the polarization beam splitting means 35.
  • the light beam B11 in the first polarization direction (P polarization direction) in the beam B10 directly penetrates the polarization beam splitting device 31, and the light beam B12 in the second polarization direction (S polarization direction) in the beam B10 is polarized.
  • the spectroscopic device 31 reflects.
  • Beam B11 is sent to projector lens 36 to display the brightness and color of the grayscale values of the corresponding pixels.
  • the beam 12 and the beam B3 are absorbed by the photoelectric converter 37, and the photoelectric converter 37 will receive the beam 12 Photoelectric conversion is performed with beam B3 to convert the energy of beam 12 and beam B3 into electrical energy.
  • the converted electrical energy is then sent to the electrical energy storage device 38 for storage.
  • the above-mentioned photoelectric converter 37 may be a solar panel, and optionally integrate the electrical energy storage device 38 and the photoelectric converter 37 into a III-V solar cell, so that the liquid crystal optical projection device 3 is miniaturized, and the energy is recovered. Efficiency can be higher.
  • FIG. 3 is a flowchart of a beam processing method in an optical architecture for a liquid crystal optical projection device according to an embodiment of the present application.
  • the unpolarized incident beam is resolved into a first beam in a first polarization direction and a second beam in a second polarization direction.
  • Step S41 can be implemented, for example, by a polarization splitting device, but the present application is not limited thereto.
  • step S42 the first light beam is subjected to deflection processing, and the deflected first light beam is the third light beam in the first polarization direction and the fourth light beam in the second polarization direction.
  • step S42 the first beam is deflected by the liquid crystal, and the deflected first beam is resolved by the polarization beam splitting means.
  • step S42 further includes performing R/G/B spectroscopic processing on the first light beam, and then performing the deflection processing on the split first light beam, and step S42 further includes combining the first of the split light beams. The beam, and then the combined first beam is resolved.
  • step S43 the second beam and the fourth beam in the second polarization direction (that is, the beam not used for projection display) are recovered and photoelectrically converted.
  • Step S43 can be realized, for example, by a photoelectric converter.
  • step S44 the third light beam is sent to the projector lens. In this way, the energy of the second and fourth beams in the second polarization direction that is not used for display by the liquid crystal optical projection device is stored by photoelectric conversion into electrical energy without wasting energy of the second and fourth beams. The problem.
  • the embodiment of the present application further provides an optical architecture of a liquid crystal optical projection device and a beam processing method thereof, which can use both the first polarization direction of the incident beam and the energy of the second polarization direction for projection display, Avoid energy waste, need to enhance the light source and overheating problems.
  • the optical architecture of the embodiment of the present application is simple and easy to implement, so it has the advantage of lower cost.
  • FIG. 4 is a schematic diagram of an optical architecture in a liquid crystal optical projection device according to an embodiment of the present application.
  • the liquid crystal optical projection device 3 may be a liquid crystal optical valve projector, but the present application is not limited thereto.
  • the optical architecture of the liquid crystal optical projection device 3 includes an R/G/B beam splitter 51, polarization splitting devices 52R, 52 G, 52B, 55, liquid crystals 53R1, 53R2, 53G1, 53G2, 53B 1, 53B2, and an optical combiner 54.
  • Projector lens 56 is included in the optical architecture of the liquid crystal optical projection device 3.
  • the light source of the liquid crystal optical projection device 5 (not shown) provides an unpolarized beam B1, the unpolarized beam B 1 is a collimated beam, and enters the R/G/B beam splitter 51, R
  • the /G/B beam splitter 51 separates the red beam B2R, the green beam B2G, and the blue beam B2B in the beam B1.
  • the red beam B2R, the green beam B2 G and the blue beam B2B then enter the polarization beam splitting devices 52R, 52G, 52B, respectively.
  • the red light beam B2R1 in the first polarization direction (P polarization direction) in the red light beam B2R directly penetrates the polarization beam splitting device 52R, and the second polarization direction in the red light beam B2R (S polarization direction)
  • the red light beam B2R2 is reflected by the polarization beam splitting device 52R.
  • the red light beam B2R1 in the first polarization direction (P polarization direction) and the red light beam B2R2 in the second polarization direction (S polarization direction) enter the two pairs of liquid crystals 53R1, 53R2, respectively, and the liquid crystals 53 R1, 53R2 are corresponding pixels.
  • the gray scale values are applied with voltages to deflect the red beams B2R1, B2R 2, respectively, and correspondingly produce the deflected red beams B3R1, B3R2, wherein the sum of the deflection angles of the red beams B2R1, B2R2 is 90 degrees.
  • the green light beam B2G1 in the first polarization direction (P polarization direction) in the green light beam B2G directly penetrates the polarization beam splitting device 52G, and the second polarization direction in the green light beam B2R (S polarization direction)
  • the green light beam B2G2 is reflected by the polarization beam splitting device 52G.
  • the green light beam B2R1 in the first polarization direction (P polarization direction) and the green light beam B2R2 in the second polarization direction (S polarization direction) enter the two pairs of liquid crystals 53G1, 53G2, respectively, and the liquid crystals 5 3G 53G2 are corresponding to the corresponding pixels.
  • the gray scale values are applied with voltages to deflect the green beams B2G1, B2 G2, respectively, and correspondingly produce the deflected green beams B3G1, B3G2, wherein the sum of the deflection angles of the green beams B2G1, B2G2 is 90 degrees.
  • the blue light beam B2B 1 in the first polarization direction (P polarization direction) in the blue light beam B2B directly penetrates the polarization beam splitting device 52B, and the second polarization direction in the blue light beam B2B (S The red light beam B2B2 of the polarization direction is reflected by the polarization beam splitting means 52B.
  • FIG. 5 is a schematic diagram of two pairs of liquid crystals in the first embodiment of the present invention deflecting a light beam in a first polarization direction and a light beam in a second polarization direction.
  • the polarization direction D1 of the light beam to be used for projection display may be deflected by the beam of the first polarization direction P1 and the beam of the second polarization direction P2 by the deflection angles of ⁇ 1 and ⁇ 2, respectively, wherein the deflection angle ⁇ 1 and The sum of ⁇ 2 is 90 degrees.
  • the rear-end projector lens 56 receives the light beam of the first polarization direction, and the red, green, and blue luminances of a certain pixel on the projection screen are respectively the maximum brightness and the maximum brightness.
  • the deflection angles ⁇ 1 and ⁇ 2 of the red beams B2R1 and B2R2 passing through the liquid crystals 53R1 and 53R2 are both 45 degrees, and the deflection angles ⁇ 1 and ⁇ 2 of the green beams B2G1 and B2G2 passing through the liquid crystals 53G1 and 53G2 are respectively 90 degrees and 0 degrees, and the deflection angles ⁇ 1 and ⁇ 2 of the blue light beams B2B1, B2B2 passing through the liquid crystals 53B1, 53B2 are 0 degrees and 90 degrees, respectively.
  • the optical combiner 54 receives and combines the red beams B3R1, B3R2, the green beams B3G1, B3G2, and the blue beams B3B1, B3B2 to generate the beam B4. Then, the light beam B4 enters the polarization beam splitting device 55.
  • the light beam B5 in the first polarization direction (P polarization direction) in the beam B4 directly penetrates the polarization beam splitting device 55, and the light beam in the second polarization direction (S polarization direction) in the beam B4 (not shown) Shown by the polarizing beam splitter 55.
  • the beam B5 is sent to the projector lens 56 to display the brightness and color of the grayscale value of the corresponding pixel.
  • the optical architecture of FIG. 4 may further include a photoelectric converter and an electrical energy storage device (not shown) ).
  • the photoelectric converter is configured to receive the light beam in the second polarization direction (S polarization direction) of the light beam B4, and perform photoelectric conversion, and the electrical energy storage device is used to store the converted electrical energy.
  • the above photoelectric converter may be a solar panel, and may alternatively be a III-V solar panel, so that the liquid crystal optical projection device 5 can be miniaturized, and the efficiency of recovering energy can be made higher.
  • the R/G/B beam splitter 51 can be removed, and only one pair of the liquid crystals 53R1, 53R2 and the polarization beam splitting device 52R need to be retained.
  • the liquid crystals 53G1, 5 3G2, 53B1, 53B2 and the polarization beam splitting means 52G, 53B can be removed.
  • the R/G/B beam splitter 51 can use a more color color splitter, and correspondingly add liquid crystal and polarization.
  • Optical device In summary, the above embodiments are not intended to limit the application.
  • FIG. 6 is a flow chart of a beam processing method in an optical architecture for a liquid crystal optical projection device according to an embodiment of the present application.
  • the unpolarized incident beam is resolved into a first beam in a first polarization direction and a second beam in a second polarization direction.
  • Step S51 can be implemented, for example, by a polarization splitting device, but the present application is not limited thereto.
  • step S52 the first beam and the second beam are subjected to deflection processing, and the deflected first beam and the second beam are combined, wherein the deflection angle of the first beam and the deflection angle of the second beam The sum is 90 degrees.
  • step S52 the first beam and the second beam are respectively subjected to deflection processing by a pair of liquid crystals, and the deflected first beam and the second beam are combined by a light combiner.
  • step S53 the merged first beam and the second beam are resolved to be a third beam in a first polarization direction and a fourth beam in a second polarization direction.
  • Step S53 can be implemented, for example, by a polarization splitting device, but the present application is not limited thereto.
  • step S54 the third light beam is sent to the projector lens. In this way, both the first polarization direction of the incident beam and the energy of the second polarization direction are used for projection display to avoid waste of energy.
  • the incident light beam before step S51, can also be divided into red, green and blue incident light beams, wherein the red, green and blue incident light beams pass through step S51.
  • the color projection display After the processing of ⁇ S54, the color projection display can be displayed instead of the grayscale projection display.
  • the liquid crystal optical projection device of the embodiment of the present application, the optical architecture thereof and the beam processing method thereof can recover the energy of the beam not used for projection, or can be the first polarization direction of the incident beam and the second The energy in the direction of polarization is used for projection display to avoid waste of energy and overheating.
  • the aforementioned liquid crystal optical projection device, its optical architecture and its beam processing method are easy to implement and do not require complicated and/or precise optical components, so that it has the advantage of low cost.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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  • Projection Apparatus (AREA)

Abstract

L'invention concerne une architecture optique d'un dispositif de projection optique à cristaux liquides et un procédé de traitement de faisceaux associé. Le procédé consiste à : identifier et classifier des faisceaux lumineux incidents non polarisés en un premier faisceau lumineux dans une première direction de polarisation et en un deuxième faisceau lumineux dans une seconde direction de polarisation (S51) ; dévier le premier faisceau lumineux et le deuxième faisceau lumineux, et fusionner le premier faisceau lumineux et le deuxième faisceau lumineux déviés, la somme de l'angle de déviation du premier faisceau lumineux et de l'angle de déviation du deuxième faisceau lumineux étant de 90 degrés (S52) ; identifier et classifier le premier faisceau lumineux et le deuxième faisceau lumineux fusionnés en un troisième faisceau lumineux dans la première direction de polarisation et en un quatrième faisceau lumineux dans la seconde direction de polarisation (S53) ; et envoyer le troisième faisceau lumineux vers une lentille de projecteur (S54).
PCT/CN2017/116245 2017-09-27 2017-12-14 Architecture optique de dispositif de projection optique à cristaux liquides et procédé de traitement de faisceaux associé WO2019061854A1 (fr)

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CN201710892264.6A CN107678237A (zh) 2017-09-27 2017-09-27 液晶光学投影装置的光学架构与其光束处理方法
CN201710892264.6 2017-09-27

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