WO2012116569A1 - 偏光眼镜、偏光滤波器、投影机 - Google Patents

偏光眼镜、偏光滤波器、投影机 Download PDF

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Publication number
WO2012116569A1
WO2012116569A1 PCT/CN2011/084829 CN2011084829W WO2012116569A1 WO 2012116569 A1 WO2012116569 A1 WO 2012116569A1 CN 2011084829 W CN2011084829 W CN 2011084829W WO 2012116569 A1 WO2012116569 A1 WO 2012116569A1
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WO
WIPO (PCT)
Prior art keywords
electric field
conductive layer
light
liquid crystal
polarizer
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Application number
PCT/CN2011/084829
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English (en)
French (fr)
Inventor
刘美鸿
Original Assignee
深圳市亿思达显示科技有限公司
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Publication of WO2012116569A1 publication Critical patent/WO2012116569A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • 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
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/26—Stereoscopic photography by simultaneous viewing using polarised or coloured light separating different viewpoint images

Definitions

  • the present invention relates to the field of projection technologies, and in particular, to a polarizing glasses, a polarizing filter, and a projector.
  • a projector is a device for projecting image signal light onto an image projected on a projection screen.
  • the existing projector includes a liquid crystal (LCD) projector, a liquid crystal on silicon (LCOS) projector, and a digital light processing (DLP) projector.
  • LCD liquid crystal
  • LCOS liquid crystal on silicon
  • DLP digital light processing
  • Stereoscopic projection is realized by the principle of polarization of light.
  • the existing scheme of realizing stereoscopic projection is to use two projectors to simultaneously project the image, and the polarization directions of the polarizers in front of the two projectors are perpendicular to each other, so that the two generated
  • the polarization directions of the beam polarized light are also perpendicular to each other, and the direction of the polarized light does not change when the polarized light is projected onto the dedicated projection screen and then reflected to the viewer position, and the viewer can only see the corresponding polarized light through the left and right eyes of the polarized glasses.
  • the image so as to create a stereoscopic feeling in the visual nervous system, to achieve the purpose of viewing stereoscopic images, the prior art can not achieve the purpose of viewing stereoscopic images through a projector.
  • the technical problem to be solved by the present invention is to provide a polarizing glasses, a polarizing filter, a projector, and a stereoscopic image system.
  • the left lens is disposed on the eyeglass frame, and includes a polarizing lens 1 for transmitting light in a direction parallel to a polarity direction;
  • the right lens is disposed on the eyeglass frame, and includes a polarizing lens 2 for transmitting light in a direction parallel to a polarity direction;
  • the polarity direction of the polarizing lens 1 is not parallel to the polarity direction of the polarizing lens 2.
  • Electric field selector electric field provider, polarizer
  • the electric field selector is configured to select a predetermined time to provide an electric field to the polarizer
  • the electric field provider is configured to provide an electric field to the polarizer when the electric field selector selects to supply an electric field to the polarizer;
  • the polarizer includes: a polarizing plate, a first conductive layer, a liquid crystal layer, and a second conductive layer;
  • the polarizing plate is configured to transmit light in a direction parallel to a polarity direction
  • the first conductive layer is bonded to the polarizing plate for transmitting light transmitted through the polarizing plate;
  • the liquid crystal layer is adhered to the first conductive layer, and is configured to rotate the light transmitted by the first conductive layer when the first conductive layer and the second conductive layer do not add an electric field. An angle, and transmitted through the rotated light; when the electric field provider provides an electric field to the first conductive layer and the second conductive layer, the light transmitted through the first conductive layer ;
  • the second conductive layer is adhered to the liquid crystal layer for transmitting light transmitted through the liquid crystal layer.
  • the projection device is configured to project image signal light
  • the polarizing filter is disposed on a transmission path of the image signal light projected by the projection device, and includes: an electric field selector, an electric field provider, and a polarizer;
  • the electric field selector is configured to select a predetermined time to provide an electric field to the polarizer
  • the electric field provider is configured to provide an electric field to the polarizer when the electric field selector selects to supply an electric field to the polarizer;
  • the polarizer includes: a polarizing plate, a first conductive layer, a liquid crystal layer, and a second conductive layer;
  • the polarizing plate is configured to transmit the linearly polarized light by transmitting the light of the image signal projected by the projection device through the light in a direction parallel to the polarity direction;
  • the first conductive layer is adhered to the polarizing plate for transmitting the linearly polarized light
  • the liquid crystal layer is adhered to the first conductive layer, and is configured to rotate the light transmitted by the first conductive layer when the first conductive layer and the second conductive layer do not add an electric field. And passing through the rotated light; when the electric field provider provides an electric field to the first conductive layer and the second conductive layer, the light transmitted through the first conductive layer ;
  • the second conductive layer is adhered to the liquid crystal layer for transmitting light transmitted through the liquid crystal layer.
  • It is an object of the present invention to provide a stereoscopic image system comprising:
  • the projector includes:
  • a polarizing filter is disposed on a transmission path of the image signal light projected by the projection device, and includes: an electric field selector, an electric field provider, and a polarizer;
  • the electric field selector is configured to select a predetermined time to provide an electric field to the polarizer
  • the electric field provider is configured to provide an electric field to the polarizer when the electric field selector selects to supply an electric field to the polarizer;
  • the polarizer includes: a polarizing plate, a first conductive layer, a liquid crystal layer, and a second conductive layer;
  • the polarizing plate is configured to transmit the linearly polarized light by transmitting the light of the image signal projected by the projection device through the light in a direction parallel to the polarity direction;
  • the first conductive layer is adhered to the polarizing plate for transmitting the linearly polarized light
  • the liquid crystal layer is adhered to the first conductive layer, and is configured to rotate the light transmitted by the first conductive layer when the first conductive layer and the second conductive layer do not add an electric field. An angle, and transmitted through the rotated light; when the electric field provider provides an electric field to the first conductive layer and the second conductive layer, through the first conductive layer Light
  • the second conductive layer is adhered to the liquid crystal layer for transmitting light transmitted through the liquid crystal layer;
  • the projection screen is disposed on a transmission path of the light transmitted by the polarizing filter in the projector, configured to reflect the light transmitted by the polarizing filter, and maintain the reflected light The direction of vibration is unchanged;
  • the polarizing glasses are disposed on the transmission path of the light reflected by the projection screen, and include: a left lens, a right lens, and a glasses frame;
  • the left lens is disposed on the eyeglass frame, and includes a polarizing lens 1 having a polarity direction parallel to a vibration direction of an image signal light projected by the projection device for transmitting parallel to a polarity direction Light
  • the right lens is disposed on the eyeglass frame, and includes a polarizing lens 2, wherein a polarity direction is parallel to a vibration direction of the rotated light obtained by the liquid crystal layer, and is used for transmitting the pole Light in parallel with the direction of sex;
  • the polarity direction of the polarizing lens 1 is not parallel to the polarity direction of the polarizing lens 2.
  • the projector of the present invention applies a polarizing filter to generate alternating image signal light at a predetermined time, for example, a frequency of 120 frames per second, each image frame is alternated in order, and the generated alternating image signal light is reflected by the projection screen to the polarized glasses.
  • the direction of vibration does not change.
  • the viewer can only see the corresponding image through the left and right lenses of the polarized glasses, that is, the viewer receives a left eye frame through the polarized glasses, the next right eye frame, and then another left eye.
  • the frame, followed by another right-eye frame creates a stereoscopic feeling in the visual nervous system, and achieves the purpose of viewing the stereoscopic image, thereby achieving the purpose of achieving stereoscopic images through a projector.
  • the stereoscopic image system of the present invention applies a projector to generate alternating image signal light at a predetermined time, such as a frequency of 120 frames per second, each image frame is alternated in order, and the generated alternating image signal light is reflected by the projection screen to the polarized glasses.
  • the direction of vibration does not change.
  • the viewer can only see the corresponding image through the left and right lenses of the polarized glasses, that is, the viewer receives a left eye frame through the polarized glasses, the next right eye frame, and then another left eye.
  • the frame, followed by another right-eye frame creates a stereoscopic feeling in the visual nervous system, and achieves the purpose of viewing the stereoscopic image, thereby achieving the purpose of achieving stereoscopic images through a projector.
  • Figure 1 is a schematic view of polarized glasses of the present invention
  • FIG. 2 is a schematic view of a polarizing filter of the present invention
  • Figure 3 is a schematic view of a polarizer
  • FIG. 4 is a schematic view of a projector of the present invention.
  • FIG. 5 is a schematic diagram of a stereoscopic image system of the present invention.
  • the invention provides a polarized glasses, a polarizing filter, a projector and a stereoscopic image system, which are applied to the field of projection technology.
  • the projector of the present invention applies a polarizing filter to generate alternating image signal light at a frequency of 120 frames per second for a predetermined time. Each image frame alternates in order, and the generated image signal light is reflected by the projection screen to the polarized glasses, and the direction of vibration of the light does not change. The viewer can only see the corresponding image through the left lens and the right lens of the polarized glasses.
  • the viewer receives a left eye frame through the polarized glasses, a next right eye frame, then another left eye frame, and then another right eye frame, thereby generating a stereoscopic feeling in the visual nervous system, and achieving stereoscopic image viewing.
  • the purpose is to achieve the purpose of achieving stereoscopic images through a projector.
  • the invention provides a polarized glasses.
  • FIG. 1 is a schematic diagram of polarized glasses according to the present invention.
  • the polarized glasses 100 include a left lens 101, a right lens 102, and a spectacle frame 103.
  • the left lens 101 is disposed on the eyeglass frame 103 and includes a polarizing lens 1 for transmitting light in a direction parallel to the polarity direction.
  • the right lens 102 is disposed on the eyeglass frame 103 and includes a polarizing lens 2 for transmitting light in a direction parallel to the polarity direction.
  • the polarity direction of the polarizing lens 1 is not parallel to the polarity direction of the polarizing lens 2.
  • the invention also provides a polarizing filter.
  • Figure 2 A schematic diagram of a polarizing filter of the present invention, the polarizing filter 200 includes an electric field selector 201, an electric field provider 202, and a polarizer 203.
  • the electric field selector 201 is configured to select a predetermined time to provide an electric field to the polarizer 203.
  • the electric field provider 202 is configured to provide an electric field to the polarizer 203 when the electric field selector 201 selects to supply an electric field to the polarizer 203.
  • FIG. 3 is a schematic diagram of a polarizer 203, comprising: a polarizing plate 2031, a first conductive layer 2032, a liquid crystal layer 2033, and a second conductive layer 2034;
  • a polarizing plate 2031 for transmitting light in a direction parallel to a polarity direction
  • the first conductive layer 2032 is adhered to the polarizing plate 2031 for transmitting light transmitted through the polarizing plate 2031;
  • the liquid crystal layer 2033 is adhered to the first conductive layer 2032 for rotating the light transmitted by the first conductive layer 2032 by a predetermined angle when the first conductive layer 2032 and the second conductive layer 2034 are not added with an electric field.
  • the rotated light the light transmitted through the first conductive layer 2032 when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034;
  • the second conductive layer 2034 is bonded to the liquid crystal layer 2033 for transmitting light transmitted through the liquid crystal layer 2033.
  • the electric field selector 201 selects a predetermined time
  • the process of providing an electric field to the polarizer 203 includes:
  • the electric field selector 201 selects an electric field to be applied to the polarizer 203 at N/120 seconds, where N includes an odd number and an even number.
  • the first conductive layer 2032 includes indium tin oxide (ITO) conductive glass and is adhered to the polarizing plate 2031 for transmitting light transmitted through the polarizing plate 2031.
  • ITO indium tin oxide
  • the second conductive layer 2034 includes indium tin oxide ITO conductive glass and is adhered to the liquid crystal layer 2033 for transmitting light transmitted through the liquid crystal layer 2033.
  • the liquid crystal layer 2033 includes a twisted nematic (TN) type liquid crystal layer bonded to the first conductive layer 2032 for rotating the first conductive layer when the first conductive layer 2032 and the second conductive layer 2034 do not add an electric field.
  • the light transmitted by the 2032 is transmitted through the first conductive layer 2032 when the light is transmitted through the first conductive layer 2032 when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034. The light.
  • TN twisted nematic
  • the liquid crystal layer 2033 includes a super twisted nematic (STN) type liquid crystal layer, and is bonded to the first conductive layer 2032 for rotating the first conductive layer when the first conductive layer 2032 and the second conductive layer 2034 do not add an electric field.
  • the light transmitted by the layer 2032 is 270 degrees and transmitted through the rotated light; when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034, it is transmitted through the first conductive layer 2032. The light that passed.
  • STN super twisted nematic
  • the electric field selector 201 includes a power supply gate for selecting a predetermined time to provide an electric field to the polarizer 203.
  • the electric field provider 202 includes a power source for supplying an electric field to the polarizer 203 when the electric field selector 201 selects to supply an electric field to the polarizer 203.
  • the invention further provides a projector.
  • FIG. 4 is a schematic diagram of a projector according to the present invention, the projector 400 includes: a projection device 401, a polarizing filter 200;
  • a projection device 401 configured to project image signal light
  • the polarizing filter 200 is disposed on the transmission path of the image signal light projected by the projection device 401, and includes: an electric field selector 201, an electric field provider 202, and a polarizer 203;
  • the electric field selector 201 is for selecting a predetermined time to supply an electric field to the polarizer 203.
  • the electric field provider 202 is configured to provide an electric field to the polarizer 203 when the electric field selector 201 selects to supply an electric field to the polarizer 203;
  • the polarizer 203 includes: a polarizing plate 2031, a first conductive layer 2032, a liquid crystal layer 2033, and a second conductive layer 2034;
  • the polarizing plate 2031 is configured to transmit the linearly polarized light by transmitting the light of the image signal projected by the projection device 401 through the light in a direction parallel to the polarity direction;
  • the first conductive layer 2032 is adhered to the polarizing plate 2031 for transmitting the linearly polarized light 1;
  • the liquid crystal layer 2033 is adhered to the first conductive layer 2032 for rotating the light transmitted by the first conductive layer 2032 by a predetermined angle when the first conductive layer 2032 and the second conductive layer 2034 are not added with an electric field, thereby obtaining linear polarization.
  • Light 2 and transmitted through the rotated light, that is, linearly polarized light 2; when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034, the light transmitted through the first conductive layer 2032 , that is, linearly polarized light;
  • the second conductive layer 2034 is bonded to the liquid crystal layer 2033 for transmitting light transmitted through the liquid crystal layer 2033, that is, transmitting linearly polarized light and transmitting linearly polarized light.
  • the electric field selector 201 selects a predetermined time
  • the process of providing an electric field to the polarizer 203 includes:
  • the electric field selector 201 selects an electric field to be applied to the polarizer 203 at N/120 seconds, where N includes an odd number and an even number.
  • the first conductive layer 2032 includes indium tin oxide ITO conductive glass and is adhered to the polarizing plate 2031 for transmitting light transmitted through the polarizing plate 2031.
  • the second conductive layer 2034 includes indium tin oxide ITO conductive glass and is adhered to the liquid crystal layer 2033 for transmitting light transmitted through the liquid crystal layer 2033.
  • the liquid crystal layer 2033 includes a twisted nematic TN type liquid crystal layer bonded to the first conductive layer 2032 for rotating the first conductive layer 2032 when the first conductive layer 2032 and the second conductive layer 2034 do not add an electric field.
  • the transmitted light is 90 degrees, the linearly polarized light is obtained, and the light obtained by the rotation is transmitted, that is, the linearly polarized light 2; when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034, The light transmitted by the first conductive layer 2032, that is, linearly polarized light.
  • the liquid crystal layer 2033 includes a super twisted nematic STN type liquid crystal layer bonded to the first conductive layer 2032 for rotating the first conductive layer 2032 when the first conductive layer 2032 and the second conductive layer 2034 do not add an electric field.
  • the transmitted light is 270 degrees, and the linearly polarized light is obtained, and the light obtained by the rotation is transmitted as the linearly polarized light 2; when the electric field provider 202 supplies the electric field to the first conductive layer 2032 and the second conductive layer 2034, The light transmitted through the first conductive layer 2032, that is, the linearly polarized light.
  • the electric field selector 201 includes a power source gate for selecting a predetermined time to supply an electric field to the polarizer 203.
  • the electric field provider 202 includes a power source for supplying an electric field to the polarizer 203 when the electric field selector 201 selects to supply an electric field to the polarizer 203.
  • the projection device 401 includes: a digital light processing DLP projector for projecting image signal light; or a liquid crystal on-liquid LCOS projector for projecting image signal light; or a liquid crystal LCD projector for projecting image signal light.
  • the polarization frequency of the polarizing filter 200 may be the same as the playing frequency of the program source.
  • the alternating image signal light generated by the polarizing filter 200 at a predetermined time may be synchronized with the image signal light projected by the projection device 401.
  • the projector 400 of the present invention applies the polarizing filter 200 to generate alternating image signal rays at a frequency of, for example, 120 frames per second, each image frame is alternated in order, and the generated alternate image signal light is reflected to the polarized glasses through the projection screen.
  • the viewer can only see the corresponding image through the left lens and the right lens of the polarized glasses, that is, the viewer receives a left eye frame through the polarized glasses, and then a right eye frame, and then another The left eye frame, and then another right eye frame, creates a stereoscopic feeling in the visual nervous system, and achieves the purpose of viewing the stereoscopic image, thereby achieving the purpose of achieving stereoscopic images through a projector.
  • the invention further provides a stereoscopic image system.
  • FIG. 5 is a schematic diagram of a stereoscopic image system of the present invention.
  • the stereoscopic image system 500 includes a projector 400, a projection screen 502, and polarized glasses 100.
  • the projector 400 includes:
  • a projection device 401 configured to project image signal light
  • the polarizing filter 200 is disposed on the transmission path of the image signal light projected by the projection device 401, and includes: an electric field selector 201, an electric field provider 202, and a polarizer 203;
  • the electric field selector 201 is configured to select a predetermined time to provide an electric field to the polarizer 203;
  • the electric field provider 202 is configured to provide an electric field to the polarizer 203 when the electric field selector 201 selects to supply an electric field to the polarizer 203;
  • the polarizer 203 includes: a polarizing plate 2031, a first conductive layer 2032, a liquid crystal layer 2033, and a second conductive layer 2034;
  • the polarizing plate 2031 is configured to transmit the linearly polarized light by transmitting the light of the image signal projected by the projection device 401 through the light in a direction parallel to the polarity direction;
  • a first conductive layer 2032 a first conductive layer 2032, and a polarizing plate 2031 for transmitting the linearly polarized light
  • the liquid crystal layer 2033 is adhered to the first conductive layer 2032 for rotating the light transmitted by the first conductive layer 2032 by a predetermined angle when the first conductive layer 2032 and the second conductive layer 2034 are not added with an electric field, thereby obtaining linear polarization.
  • Light 2 and transmitted through the rotated light, that is, linearly polarized light 2; when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034, the light transmitted through the first conductive layer 2032 , that is, linearly polarized light;
  • the second conductive layer 2034 is bonded to the liquid crystal layer 2033 for transmitting light transmitted through the liquid crystal layer 2033, that is, transmitting linearly polarized light and transmitting linearly polarized light.
  • the projection screen 502 is disposed on the transmission path of the linearly polarized light 1 and the linearly polarized light which are transmitted by the polarizing filter 200 in the projector 400, and is used to reflect the light transmitted by the polarizing filter 200, that is, the linearly polarized light.
  • the linearly polarized light is two, and the reflected light is kept parallel to the vibration direction of the light before the reflection, that is, the vibration direction of the light obtained by the reflected linearly polarized light is parallel to the vibration direction of the linearly polarized light, and is maintained.
  • the direction of vibration of the light obtained by the polarized light of the reflected line is parallel to the direction of vibration of the linearly polarized light.
  • the polarizing glasses 100 are disposed on the transmission path of the light reflected by the projection screen 502, and include: a left lens 101, a right lens 102, and an eyeglass frame 103;
  • the left lens 101 is disposed on the eyeglass frame 103, and includes a polarizing lens 1 having a polarity direction parallel to the vibration direction of the linearly polarized light 1 for transmitting light in a direction parallel to the polarity direction;
  • the right lens 102 is disposed on the eyeglass frame 103 and includes a polarizing lens 2, and the polar direction is parallel to the vibration direction of the linearly polarized light 2 for transmitting light in a direction parallel to the polarity direction;
  • the polarity direction of the polarizing lens 1 is not parallel to the polarity direction of the polarizing lens 2.
  • the electric field selector 201 selects a predetermined time
  • the process of providing an electric field to the polarizer 203 includes:
  • the electric field selector 201 selects an electric field to be applied to the polarizer 203 at N/120 seconds, where N includes an odd number and an even number.
  • the first conductive layer 2032 includes indium tin oxide ITO conductive glass and is adhered to the polarizing plate 2031 for transmitting light transmitted through the polarizing plate 2031.
  • the light transmitted therethrough is an image signal light, that is, linearly polarized light. .
  • the second conductive layer 2034 includes indium tin oxide ITO conductive glass and is adhered to the liquid crystal layer 2033 for transmitting light transmitted through the liquid crystal layer 2033, that is, transmitting linearly polarized light and transmitting linearly polarized light.
  • the liquid crystal layer 2033 includes a twisted nematic TN type liquid crystal layer bonded to the first conductive layer 2032 for rotating the first conductive layer 2032 when the first conductive layer 2032 and the second conductive layer 2034 do not add an electric field.
  • the transmitted light is 90 degrees, the linearly polarized light is obtained, and the light obtained by the rotation is transmitted, that is, the linearly polarized light 2; when the electric field provider 202 supplies an electric field to the first conductive layer 2032 and the second conductive layer 2034, The light transmitted by the first conductive layer 2032, that is, linearly polarized light.
  • the liquid crystal layer 2033 includes a super twisted nematic STN type liquid crystal layer bonded to the first conductive layer 2032 for rotating the first conductive layer 2032 when the first conductive layer 2032 and the second conductive layer 2034 do not add an electric field.
  • the transmitted light is 270 degrees, and the linearly polarized light is obtained, and the light obtained by the rotation is transmitted as the linearly polarized light 2; when the electric field provider 202 supplies the electric field to the first conductive layer 2032 and the second conductive layer 2034, The light transmitted through the first conductive layer 2032, that is, the linearly polarized light.
  • the electric field selector 201 includes a power source gate for selecting a predetermined time to supply an electric field to the polarizer 203.
  • the electric field provider 202 includes a power source for supplying an electric field to the polarizer 203 when the electric field selector 201 selects to supply an electric field to the polarizer 203.
  • the projection screen 502 includes a metal projection screen, and is disposed on a transmission path of the linearly polarized light 1 and the linearly polarized light 2 transmitted by the polarizing filter 200 in the projector 400 for reflecting the light transmitted by the polarizing filter 200. That is, the linearly polarized light is linearly polarized, and the reflected light is kept parallel to the vibration direction of the light before the reflection, that is, the vibration direction of the light obtained by the reflected linearly polarized light and the vibration direction of the linearly polarized light are maintained. Parallel, the direction of vibration of the light obtained by maintaining the polarized light of the reflected line is parallel to the direction of vibration of the linearly polarized light.
  • the projection device 401 includes: a digital light processing DLP projector for projecting image signal light; or a liquid crystal on-liquid LCOS projector for projecting image signal light; or a liquid crystal LCD projector for projecting image signal light.
  • the polarization frequency of the polarizing filter 200 may be the same as the playing frequency of the program source.
  • the alternating image signal light generated by the polarizing filter 200 at a predetermined time may be synchronized with the image signal light projected by the projection device 401.
  • the stereoscopic image system 500 of the present invention applies the projector 400 to generate alternating image signal rays at a predetermined time, such as 120 frames per second, each image frame is alternated in sequence, and the resulting alternating image signal light is reflected to the polarized light through the projection screen 502.
  • the direction of vibration of the light does not change, and the viewer can only see the corresponding image through the left lens 101 and the right lens 102 of the polarized glasses 100, that is, the viewer receives a left eye frame through the polarized glasses 100, and the next right The eye frame, then another left eye frame, and then another right eye frame, thereby generating a stereoscopic feeling in the visual nervous system, and achieving the purpose of viewing the stereoscopic image, thereby achieving the purpose of achieving a stereoscopic image through a projector.
  • polarized glasses, the polarizing filter, the projector, and the stereoscopic image system of the present invention are realized in various forms. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Projection Apparatus (AREA)
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Description

偏光眼镜、偏光滤波器、投影机
【技术领域】
本发明涉及投影技术领域，尤其涉及一种偏光眼镜、偏光滤波器、投影机。
【背景技术】
投影机是一种用于投射图像信号光线至投影屏幕上成像的设备，现有的投影机包括液晶（LCD）投影机、硅基液晶（LCOS）投影机、数字光处理（DLP）投影机。
立体投影是通过光的偏振原理来实现的，现有的实现立体投影的方案是采用两台投影机同步投射图像，将两台投影机前的起偏器的偏振方向互相垂直，让产生的两束偏振光的偏振方向也互相垂直，而且偏振光投射至专用的投影屏幕再反射至观看者位置时偏振光方向不会改变，观看者通过偏光眼镜左、右眼只能看到相应的偏振光图像，从而在视觉神经系统中产生立体感觉，达到观赏立体影像的目的，现有技术还无法实现通过一台投影机达到观赏立体影像的目的。
【发明内容】
本发明要解决的技术问题是提供一种偏光眼镜、偏光滤波器、投影机、立体影像系统。
本发明的目的在于提供一种偏光眼镜，包括：
左镜片、右镜片、眼镜框架；
所述左镜片，设置于所述眼镜框架上，包括偏光镜片一，用于透过与极性方向相平行方向的光线；
所述右镜片，设置于所述眼镜框架上，包括偏光镜片二，用于透过与极性方向相平行方向的光线；
所述偏光镜片一的极性方向与偏光镜片二的极性方向不相平行。
本发明的目的在于还提供一种偏光滤波器，包括：
电场选择器、电场提供器、起偏器；
所述电场选择器，用于选择预定时间，对所述起偏器提供电场；
所述电场提供器，用于在所述电场选择器选择对所述起偏器提供电场时，提供电场给所述起偏器；
所述起偏器，包括：偏光板、第一导电层、液晶层、第二导电层；
所述偏光板，用于透过与极性方向相平行方向的光线；
所述第一导电层，与所述偏光板相粘合，用于透过所述偏光板所透过的光线；
所述液晶层，与所述第一导电层相粘合，用于在所述第一导电层、所述第二导电层不加入电场时，旋转所述第一导电层所透过的光线预定角度，并透过所述经旋转后的光线；在所述电场提供器提供电场给所述第一导电层、所述第二导电层时，透过所述第一导电层所透过的光线；
所述第二导电层，与所述液晶层相粘合，用于透过所述液晶层所透过的光线。
本发明的目的在于又提供一种投影机，包括：
投射设备、偏光滤波器；
所述投射设备，用于投射图像信号光线；
所述偏光滤波器，设置于所述投射设备所投射出的图像信号光线的传递路径上，包括：电场选择器、电场提供器、起偏器；
所述电场选择器，用于选择预定时间，对所述起偏器提供电场；
所述电场提供器，用于在所述电场选择器选择对所述起偏器提供电场时，提供电场给所述起偏器；
所述起偏器，包括：偏光板、第一导电层、液晶层、第二导电层；
所述偏光板，用于透过与极性方向相平行方向的光线，透过所述投射设备所投射出的图像信号光线，得到线偏振光一；
所述第一导电层，与所述偏光板相粘合，用于透过所述线偏振光一；
所述液晶层，与所述第一导电层相粘合，用于在所述第一导电层、所述第二导电层不加入电场时，旋转所述第一导电层所透过的光线预定角度，并透过该经旋转后得到的光线；在所述电场提供器提供电场给所述第一导电层、所述第二导电层时，透过所述第一导电层所透过的光线；
所述第二导电层，与所述液晶层相粘合，用于透过所述液晶层所透过的光线。
本发明的目的在于再提供一种立体影像系统，包括：
投影机、投影屏幕、偏光眼镜；
所述投影机，包括：
投射设备，用于投射图像信号光线；
偏光滤波器，设置于所述投射设备所投射出的图像信号光线的传递路径上，包括：电场选择器、电场提供器、起偏器；
所述电场选择器，用于选择预定时间，对所述起偏器提供电场；
所述电场提供器，用于在所述电场选择器选择对所述起偏器提供电场时，提供电场给所述起偏器；
所述起偏器，包括：偏光板、第一导电层、液晶层、第二导电层；
所述偏光板，用于透过与极性方向相平行方向的光线，透过所述投射设备所投射出的图像信号光线，得到线偏振光一；
所述第一导电层，与所述偏光板相粘合，用于透过所述线偏振光一；
所述液晶层，与所述第一导电层相粘合，用于在所述第一导电层、所述第二导电层不加入电场时，旋转所述第一导电层所透过的光线预定角度，并透过所述经旋转后得到的光线；在所述电场提供器提供电场给所述第一导电层、所述第二导电层时，透过所述第一导电层所透过的光线；
所述第二导电层，与所述液晶层相粘合，用于透过所述液晶层所透过的光线；
所述投影屏幕，设置于所述投影机中所述偏光滤波器所透过的光线的传递路径上，用于反射所述偏光滤波器所透过的光线，并保持所述经反射后的光线的振动方向不变；
所述偏光眼镜，设置于所述经所述投影屏幕反射后的光线的传递路径上，包括：左镜片、右镜片、眼镜框架；
所述左镜片，设置于所述眼镜框架上，包括偏光镜片一，极性方向与所述投射设备所投射出的图像信号光线的振动方向相平行，用于透过与极性方向相平行方向的光线；
所述右镜片，设置于所述眼镜框架上，包括偏光镜片二，极性方向与所述液晶层所透过的所述经旋转后得到的光线的振动方向相平行，用于透过与极性方向相平行方向的光线；
所述偏光镜片一的极性方向与偏光镜片二的极性方向不相平行。
本发明投影机应用偏光滤波器按预定时间如每秒120帧的频率产生交替的图像信号光线，各图像帧按顺序交替，而且该产生的交替的图像信号光线经投影屏幕反射至偏光眼镜时光线的振动方向不会改变，观看者通过偏光眼镜左镜片、右镜片只能看到相应的图像，即观看者通过偏光眼镜接收到一个左眼帧，接下来一个右眼帧，然后再一个左眼帧，接下来又一个右眼帧，从而在视觉神经系统中产生立体感觉，达到观赏立体影像的目的，从而达到实现通过一台投影机达到观赏立体影像的目的。
本发明立体影像系统应用投影机按预定时间如每秒120帧的频率产生交替的图像信号光线，各图像帧按顺序交替，而且该产生的交替的图像信号光线经投影屏幕反射至偏光眼镜时光线的振动方向不会改变，观看者通过偏光眼镜左镜片、右镜片只能看到相应的图像，即观看者通过偏光眼镜接收到一个左眼帧，接下来一个右眼帧，然后再一个左眼帧，接下来又一个右眼帧，从而在视觉神经系统中产生立体感觉，达到观赏立体影像的目的，从而达到实现通过一台投影机达到观赏立体影像的目的。
【附图说明】
图1，为本发明偏光眼镜的示意图；
图2，为本发明偏光滤波器的示意图；
图3，为起偏器的示意图；
图4，为本发明投影机的示意图；
图5，为本发明立体影像系统的示意图。
【具体实施方式】
本发明提供一种偏光眼镜、偏光滤波器、投影机、立体影像系统，应用于投影技术领域，本发明投影机应用偏光滤波器按预定时间如每秒120帧的频率产生交替的图像信号光线，各图像帧按顺序交替，而且该产生的交替的图像信号光线经投影屏幕反射至偏光眼镜时光线的振动方向不会改变，观看者通过偏光眼镜左镜片、右镜片只能看到相应的图像，即观看者通过偏光眼镜接收到一个左眼帧，接下来一个右眼帧，然后再一个左眼帧，接下来又一个右眼帧，从而在视觉神经系统中产生立体感觉，达到观赏立体影像的目的，从而达到实现通过一台投影机达到观赏立体影像的目的。
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。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。
本发明提供一种偏光眼镜。
请参见图1，图1为本发明偏光眼镜的示意图，该偏光眼镜100包括：左镜片101、右镜片102、眼镜框架103。
其中，左镜片101，设置于眼镜框架103上，包括偏光镜片一，用于透过与极性方向相平行方向的光线。
其中，右镜片102，设置于眼镜框架103上，包括偏光镜片二，用于透过与极性方向相平行方向的光线。
其中，偏光镜片一的极性方向与偏光镜片二的极性方向不相平行。
本发明还提供一种偏光滤波器。
请参见图2，图2 为本发明偏光滤波器的示意图，该偏光滤波器200包括：电场选择器201、电场提供器202、起偏器203。
其中，电场选择器201，用于选择预定时间，对起偏器203提供电场。
其中，电场提供器202，用于在电场选择器201选择对起偏器203提供电场时，提供电场给起偏器203。
请参见图3，图3为起偏器的示意图，该起偏器203包括：偏光板2031、第一导电层2032、液晶层2033、第二导电层2034；
偏光板2031，用于透过与极性方向相平行方向的光线；
第一导电层2032，与偏光板2031相粘合，用于透过偏光板2031所透过的光线；
液晶层2033，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线预定角度，并透过该经旋转后的光线；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线；
第二导电层2034，与液晶层2033相粘合，用于透过液晶层2033所透过的光线。
其中，电场选择器201选择预定时间，对起偏器203提供电场的过程包括：
电场选择器201选择在N/120秒时，对起偏器203提供电场，其中的N包括奇数、偶数。
其中，第一导电层2032包括氧化铟锡（ITO）导电玻璃，与偏光板2031相粘合，用于透过偏光板2031所透过的光线。
其中，第二导电层2034包括氧化铟锡ITO导电玻璃，与液晶层2033相粘合，用于透过液晶层2033所透过的光线。
其中，液晶层2033包括扭曲向列（TN）型液晶层，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线90度，并透过该经旋转后的光线；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线。
其中，液晶层2033包括超级扭曲向列（STN）型液晶层，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线270度，并透过该经旋转后的光线；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线。
继续参阅图2，电场选择器201包括电源选通器，用于选择预定时间，对起偏器203提供电场。
其中，电场提供器202包括电源，用于在电场选择器201选择对起偏器203提供电场时，提供电场给起偏器203。
本发明又提供一种投影机。
请参见图2-4，图4为本发明投影机的示意图，该投影机400包括：投射设备401、偏光滤波器200；
投射设备401，用于投射图像信号光线；
偏光滤波器200，设置于投射设备401所投射出的图像信号光线的传递路径上，包括：电场选择器201、电场提供器202、起偏器203；
电场选择器201，用于选择预定时间，对起偏器203提供电场。
电场提供器202，用于在电场选择器201选择对起偏器203提供电场时，提供电场给起偏器203；
起偏器203，包括：偏光板2031、第一导电层2032、液晶层2033、第二导电层2034；
偏光板2031，用于透过与极性方向相平行方向的光线，透过投射设备401所投射出的图像信号光线，得到线偏振光一；
第一导电层2032，与偏光板2031相粘合，用于透过该线偏振光一；
液晶层2033，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线预定角度，得到线偏振光二，并透过该经旋转后得到的光线即线偏振光二；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线，即线偏振光一；
第二导电层2034，与液晶层2033相粘合，用于透过液晶层2033所透过的光线，即透过线偏振光一、透过线偏振光二。
其中，电场选择器201选择预定时间，对起偏器203提供电场的过程包括：
电场选择器201选择在N/120秒时，对起偏器203提供电场，其中的N包括奇数、偶数。
其中，第一导电层2032包括氧化铟锡ITO导电玻璃，与偏光板2031相粘合，用于透过偏光板2031所透过的光线。
其中，第二导电层2034包括氧化铟锡ITO导电玻璃，与液晶层2033相粘合，用于透过液晶层2033所透过的光线。
其中，液晶层2033包括扭曲向列TN型液晶层，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线90度，得到线偏振光二，并透过该经旋转后得到的光线即线偏振光二；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线，即线偏振光一。
其中，液晶层2033包括超级扭曲向列STN型液晶层，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线270度，得到线偏振光二，并透过该经旋转后得到的光线即线偏振光二；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线，即线偏振光一。
其中，电场选择器201包括电源选通器，用于选择预定时间，对起偏器203提供电场。
其中，电场提供器202包括电源，用于在电场选择器201选择对起偏器203提供电场时，提供电场给起偏器203。
其中，投射设备401包括：数字光处理DLP投影机，用于投射图像信号光线；或硅基液晶LCOS投影机，用于投射图像信号光线；或液晶LCD投影机，用于投射图像信号光线。
其中，偏光滤波器200的偏振频率可以与节目源的播放频率相同。
其中，偏光滤波器200按预定时间如每秒120帧的频率所产生的交替的图像信号光线可以与投射设备401所投射出的图像信号光线同步。
本发明投影机400应用偏光滤波器200按预定时间如每秒120帧的频率产生交替的图像信号光线，各图像帧按顺序交替，而且该产生的交替的图像信号光线经投影屏幕反射至偏光眼镜时光线的振动方向不会改变，观看者通过偏光眼镜左镜片、右镜片只能看到相应的图像，即观看者通过偏光眼镜接收到一个左眼帧，接下来一个右眼帧，然后再一个左眼帧，接下来又一个右眼帧，从而在视觉神经系统中产生立体感觉，达到观赏立体影像的目的，从而达到实现通过一台投影机达到观赏立体影像的目的。
本发明再提供一种立体影像系统。
请参见图1-5，图5为本发明立体影像系统的示意图，该立体影像系统500包括：投影机400、投影屏幕502、偏光眼镜100。
其中，投影机400包括：
投射设备401，用于投射图像信号光线；
偏光滤波器200，设置于投射设备401所投射出的图像信号光线的传递路径上，包括：电场选择器201、电场提供器202、起偏器203；
电场选择器201，用于选择预定时间，对起偏器203提供电场；
电场提供器202，用于在电场选择器201选择对起偏器203提供电场时，提供电场给起偏器203；
起偏器203，包括：偏光板2031、第一导电层2032、液晶层2033、第二导电层2034；
偏光板2031，用于透过与极性方向相平行方向的光线，透过投射设备401所投射出的图像信号光线，得到线偏振光一；
第一导电层2032，与偏光板2031，用于透过该线偏振光一；
液晶层2033，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线预定角度，得到线偏振光二，并透过该经旋转后得到的光线即线偏振光二；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线，即线偏振光一；
第二导电层2034，与液晶层2033相粘合，用于透过液晶层2033所透过的光线，即透过线偏振光一、透过线偏振光二。
其中，投影屏幕502，设置于投影机400中偏光滤波器200所透过的光线即线偏振光一、线偏振光二的传递路径上，用于反射偏光滤波器200所透过的光线即线偏振光一、线偏振光二，并保持该经反射后的光线与经反射前的光线的振动方向相平行，即保持经反射线偏振光一后得到的光线的振动方向与线偏振光一的振动方向相平行，保持经反射线偏振光二后得到的光线的振动方向与线偏振光二的振动方向相平行。
其中，偏光眼镜100，设置于经投影屏幕502反射后的光线的传递路径上，包括：左镜片101、右镜片102、眼镜框架103；
左镜片101，设置于眼镜框架103上，包括偏光镜片一，极性方向与线偏振光一的振动方向相平行，用于透过与极性方向相平行方向的光线；
右镜片102，设置于眼镜框架103上，包括偏光镜片二，极性方向与线偏振光二的振动方向相平行，用于透过与极性方向相平行方向的光线；
其中，偏光镜片一的极性方向与偏光镜片二的极性方向不相平行。
其中，电场选择器201选择预定时间，对起偏器203提供电场的过程包括：
电场选择器201选择在N/120秒时，对起偏器203提供电场，其中的N包括奇数、偶数。
其中，第一导电层2032包括氧化铟锡ITO导电玻璃，与偏光板2031相粘合，用于透过偏光板2031所透过的光线，此处透过的光线为图像信号光线即线偏振光一。
其中，第二导电层2034包括氧化铟锡ITO导电玻璃，与液晶层2033相粘合，用于透过液晶层2033所透过的光线，即透过线偏振光一、透过线偏振光二。
其中，液晶层2033包括扭曲向列TN型液晶层，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线90度，得到线偏振光二，并透过该经旋转后得到的光线即线偏振光二；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线，即线偏振光一。
其中，液晶层2033包括超级扭曲向列STN型液晶层，与第一导电层2032相粘合，用于在第一导电层2032、第二导电层2034不加入电场时，旋转第一导电层2032所透过的光线270度，得到线偏振光二，并透过该经旋转后得到的光线即线偏振光二；在电场提供器202提供电场给第一导电层2032、第二导电层2034时，透过第一导电层2032所透过的光线，即线偏振光一。
其中，电场选择器201包括电源选通器，用于选择预定时间，对起偏器203提供电场。
其中，电场提供器202包括电源，用于在电场选择器201选择对起偏器203提供电场时，提供电场给起偏器203。
其中，投影屏幕502包括金属投影屏幕，设置于投影机400中偏光滤波器200所透过的光线即线偏振光一、线偏振光二的传递路径上，用于反射偏光滤波器200所透过的光线即线偏振光一、线偏振光二，并保持该经反射后的光线与经反射前的光线的振动方向相平行，即保持经反射线偏振光一后得到的光线的振动方向与线偏振光一的振动方向相平行，保持经反射线偏振光二后得到的光线的振动方向与线偏振光二的振动方向相平行。
其中，投射设备401包括：数字光处理DLP投影机，用于投射图像信号光线；或硅基液晶LCOS投影机，用于投射图像信号光线；或液晶LCD投影机，用于投射图像信号光线。
其中，偏光滤波器200的偏振频率可以与节目源的播放频率相同。
其中，偏光滤波器200按预定时间如每秒120帧的频率所产生的交替的图像信号光线可以与投射设备401所投射出的图像信号光线同步。
本发明立体影像系统500应用投影机400按预定时间如每秒120帧的频率产生交替的图像信号光线，各图像帧按顺序交替，而且该产生的交替的图像信号光线经投影屏幕502反射至偏光眼镜100时光线的振动方向不会改变，观看者通过偏光眼镜100左镜片101、右镜片102只能看到相应的图像，即观看者通过偏光眼镜100接收到一个左眼帧，接下来一个右眼帧，然后再一个左眼帧，接下来又一个右眼帧，从而在视觉神经系统中产生立体感觉，达到观赏立体影像的目的，从而达到实现通过一台投影机达到观赏立体影像的目的。
对于本发明偏光眼镜、偏光滤波器、投影机、立体影像系统，实现的形式是多种多样的。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种偏光眼镜，其特征在于，包括：左镜片、右镜片、眼镜框架；
    所述左镜片，设置于所述眼镜框架上，包括偏光镜片一，用于透过与极性方向相平行方向的光线；
    所述右镜片，设置于所述眼镜框架上，包括偏光镜片二，用于透过与极性方向相平行方向的光线；
    所述偏光镜片一的极性方向与偏光镜片二的极性方向不相平行。
  2. 一种偏光滤波器，其特征在于，包括：电场选择器、电场提供器、起偏器；
    所述电场选择器，用于选择预定时间，对所述起偏器提供电场；
    所述电场提供器，用于在所述电场选择器选择对所述起偏器提供电场时，提供电场给所述起偏器；
    所述起偏器，包括：偏光板、第一导电层、液晶层、第二导电层；
    所述偏光板，用于透过与极性方向相平行方向的光线；
    所述第一导电层，与所述偏光板相粘合，用于透过所述偏光板所透过的光线；
    所述液晶层，与所述第一导电层相粘合，用于在所述第一导电层、所述第二导电层不加入电场时，旋转所述第一导电层所透过的光线预定角度，并透过所述经旋转后 的光线；在所述电场提供器提供电场给所述第一导电层、所述第二导电层时，透过所述第一导电层所透过的光线；
    所述第二导电层，与所述液晶层相粘合，用于透过所述液晶层所透过的光线。
  3. 如权利要求2所述的偏光滤波器，其特征在于，所述电场选择器选择在N/120秒时，对所述起偏器提供电场，所述N包括奇数、偶数。
  4. 如权利要求2所述的偏光滤波器，其特征在于，所述第一导电层和所述第二导电层包括氧化铟锡ITO导电玻璃。
  5. 如权利要求2所述的偏光滤波器，其特征在于，所述液晶层为扭曲向列TN型或超级扭曲向列STN型。
  6. 一种投影机，其特征在于，包括：投射设备、偏光滤波器；
    所述投射设备，用于投射图像信号光线；
    所述偏光滤波器，设置于所述投射设备所投射出的图像信号光线的传递路径上，包括：电场选择器、电场提供器、起偏器；
    所述电场选择器，用于选择预定时间，对所述起偏器提供电场；
    所述电场提供器，用于在所述电场选择器选择对所述起偏器提供电场时，提供电场给所述起偏器；
    所述起偏器，包括：偏光板、第一导电层、液晶层、第二导电层；
    所述偏光板，用于透过与极性方向相平行方向的光线，透过所述投射设备所投射出的图像信号光线，得到线偏振光一；
    所述第一导电层，与所述偏光板相粘合，用于透过所述线偏振光一；
    所述液晶层，与所述第一导电层相粘合，用于在所述第一导电层、所述第二导电层不加入电场时，旋转所述第一导电层所透过的光线预定角度，并透过该经旋转后得 到的光线；在所述电场提供器提供电场给所述第一导电层、所述第二导电层时，透过所述第一导电层所透过的光线；
    所述第二导电层，与所述液晶层相粘合，用于透过所述液晶层所透过的光线。
  7. 如权利要求6所述的投影机，其特征在于，所述电场选择器选择在N/120秒时，对所述起偏器提供电场，所述N包括奇数、偶数。
  8. 如权利要求6所述的投影机，其特征在于，所述第一导电层和所述第二导电层包括氧化铟锡ITO导电玻璃。
  9. 如权利要求6所述的投影机，其特征在于，所述液晶层为扭曲向列TN型或超级扭曲向列STN型。
  10. 如权利要求6所述的投影机，其特征在于，所述偏光滤波器的偏振频率与节目源的播放频率相同。
  11. 如权利要求6所述的投影机，其特征在于，所述投射设备，包括：
    数字光处理DLP投影机，用于投射图像信号光线；或硅基液晶LCOS投影机，用于投射图像信号光线；或液晶LCD投影机，用于投射图像信号光线。
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