WO2017080089A1 - 指向性彩色滤光片和裸眼3d显示装置 - Google Patents

指向性彩色滤光片和裸眼3d显示装置 Download PDF

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Publication number
WO2017080089A1
WO2017080089A1 PCT/CN2015/100166 CN2015100166W WO2017080089A1 WO 2017080089 A1 WO2017080089 A1 WO 2017080089A1 CN 2015100166 W CN2015100166 W CN 2015100166W WO 2017080089 A1 WO2017080089 A1 WO 2017080089A1
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Prior art keywords
filter
light
subunit
structural
sub
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PCT/CN2015/100166
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English (en)
French (fr)
Inventor
陈林森
乔文
朱鸣
万文强
黄文彬
浦东林
朱鹏飞
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Suzhou University
SVG Optronics Co Ltd
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Suzhou University
SVG Optronics Co Ltd
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Priority to US15/774,794 priority Critical patent/US10429660B2/en
Priority to KR1020187015777A priority patent/KR20180078311A/ko
Priority to JP2018524315A priority patent/JP2019502941A/ja
Publication of WO2017080089A1 publication Critical patent/WO2017080089A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • 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
    • G02B30/26—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 autostereoscopic type
    • G02B30/33—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 autostereoscopic type involving directional light or back-light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1809—Diffraction gratings with pitch less than or comparable to the wavelength
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/204—Filters in which spectral selection is performed by means of a conductive grid or array, e.g. frequency selective surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G02F1/133521—Interference filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/05—Function characteristic wavelength dependent
    • G02F2203/055—Function characteristic wavelength dependent wavelength filtering
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/22—Function characteristic diffractive
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/122—Improving the three-dimensional [3D] impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues
    • H04N13/125—Improving the three-dimensional [3D] impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues for crosstalk reduction

Definitions

  • the present invention relates to the field of stereoscopic display technology, and more particularly to a directional color filter and a naked-eye 3D display device.
  • 3D display technology can make the picture more realistic and realistic, and let the audience have an immersive feeling, 3D display technology is more and more popular.
  • the principle of 3D display technology is to use different left and right eyes to receive different images with parallax, and then superimpose the parallax images through the brain to form an image with stereoscopic effects such as front, back, left and right, up and down, and far and near.
  • the naked eye 3D display device based on the parallax principle is continuously generated in the prior art, the existing naked eye 3D display device has problems such as image crosstalk easily causing visual fatigue and small viewing angle, and thus the existing naked eye 3D display device is Not really entering the field of consumer electronics.
  • the prior art proposes a new 3D display technology, that is, a directional backlight technology, which processes a specially designed structure on a light guide plate to direct light propagation in different directions to form a parallax illumination with a large viewing angle.
  • a directional backlight technology which processes a specially designed structure on a light guide plate to direct light propagation in different directions to form a parallax illumination with a large viewing angle.
  • Chinese patent CN201410187534.X proposes a naked-eye 3D backlight module that uses one or more sets of LED timing light sources in combination with a convex lens, a polygonal prism, and a parallax barrier to achieve multi-view 3D display.
  • the present invention provides a directional color filter and a naked-eye 3D display device, which is technically difficult to achieve due to the design and precision processing precision of the lens, prism, and the like of the backlight module in the prior art. And it is easy to have the problem of crosstalk.
  • the present invention provides the following technical solutions:
  • a directional color filter comprising a color filter and a directional functional structural layer on a light exit surface of the color filter
  • the color filter includes a plurality of filter units, each of the filter units including at least three filter subunits of different colors, wherein the colors of the light passing through the filter subunits of the same color are the same;
  • the directional functional structure layer includes a plurality of structural units, each of the structural units being disposed corresponding to one of the filter units; each of the structural units including at least three structural subunits; each of the structural subunits Corresponding to one of the filter subunits, so that light passing through each of the filter subunits is incident into a corresponding one of the structural subunits;
  • Each of the structural subunits comprises a plurality of nano-diffraction gratings; the periodicity and orientation angle of the nano-diffraction gratings in the same structural sub-unit are different, so that the same color of light passing through the same structural sub-unit has different viewing angles; The period and orientation angle of the nano-diffraction grating at the same position in the structural sub-unit corresponding to the filter subunits of different color units of the light unit are also different, so that the light of different colors synthesizing the same view image has the same viewing angle.
  • the filter unit comprises a red filter subunit, a green filter subunit and a blue filter subunit, and the red filter subunit transmits only red light, and the green filter subunit transmits only green light,
  • the blue filter subunit transmits only blue light;
  • the structural unit includes a first structural subunit, a second structural subunit, and a third structural subunit, the first structural subunit being disposed corresponding to the red filter subunit, the second structural subunit and the The green filter subunit is correspondingly disposed, and the third structure subunit is disposed corresponding to the blue filter subunit.
  • the period and orientation angle of the nano-diffraction grating are determined by the wavelength of the incident ray, the angle of incidence, the diffraction angle of the diffracted ray, and the diffraction azimuth.
  • the directional color filter is fabricated by photolithography, ultraviolet continuous variable space lithography or nanoimprint technology.
  • the directional color filter has an opening angle corresponding to a viewpoint of 150 degrees or more.
  • the period of the nano-diffraction grating in the directional color filter ranges from 300 nanometers to 3 micrometers.
  • a naked eye 3D display device comprising a directional color filter, a light source array disposed on a light incident side of the directional color filter, and a liquid crystal display panel disposed on a light outgoing side of the directional color filter;
  • the light source array includes at least three kinds of laser point light sources, and different types of laser point light sources emit different colors of laser light, and the laser point light sources are used for emitting at a preset position to be incident on the directional color filter at a preset angle.
  • the directional color filter is the directional color filter according to any one of the above, wherein the directional color filter adjusts a phase of a laser light transmitted through the filter subunit and a corresponding structural subunit In order to make the light of the same color passing through the same filter sub-unit have different viewing angles, and the lights of different colors synthesizing the same view image have the same viewing angle;
  • the liquid crystal display panel includes a plurality of pixel units, each of the pixel units includes at least three sub-pixels, each of the pixel units is disposed corresponding to one of the filter units, and the sub-pixels in the same pixel unit correspond to
  • the filter sub-units in the filter unit are arranged one by one, and the liquid crystal display panel synthesizes different color lights of the same viewing angle into the same view image by adjusting the amplitude of the laser light transmitted through the sub-pixels, and images of different viewing angles Synthesize 3D display images.
  • the laser point source comprises a laser that emits laser light and a laser beam expander disposed on the light exit path of the laser, the laser beam expander is configured to expand a diameter of the laser to irradiate the laser to the On the entire panel of the directional color filter.
  • the light source array comprises a red laser point source emitting red light, a green laser point source emitting green light, and a blue laser point source emitting blue light.
  • the at least three different color filter subunits comprise a red filter subunit, a green filter subunit and a blue filter subunit, the red filter subunit transmitting only the red laser, the green filter subunit transmitting only a green laser, the blue filter subunit transmitting only a blue laser;
  • the at least three structural subunits include a first structural subunit, a second structural subunit, and a third structural subunit; the at least three subpixels including a red subpixel, a green subpixel, and a blue subpixel;
  • the red sub-pixel is disposed corresponding to the first structure sub-unit and the red filter sub-unit
  • the green sub-pixel is corresponding to the second structure sub-unit and the green filter sub-unit
  • the blue sub-pixel is disposed corresponding to the third structure sub-unit and the blue filter sub-unit.
  • the light is color-separated and filtered by the corresponding filter sub-unit before being incident on the nano-diffraction grating in the directional functional structure layer, and therefore, The same nano-diffraction grating appears to emit two colors of light, resulting in crosstalk of the emitted light;
  • the present invention it is not necessary to adopt a high-precision lens, a prism, or the like, and the directional color filter is technically easy to implement. Therefore, the fatigue-free multi-view naked eye 3D based on the directional backlight technology provided by the present invention is provided. Display devices can be put to practical use.
  • FIG. 1 is a schematic cross-sectional structural view of a directional color filter according to an embodiment of the present invention
  • FIG. 2 is a schematic plan view showing a planar color filter provided by an embodiment of the present invention.
  • FIG. 3 is a plan view showing the planar structure of the color filter in the directional color filter shown in FIG. 1;
  • FIG. 4 is a schematic plan view showing a planar structure of a directional functional structure layer in the directional color filter shown in FIG. 1;
  • Figure 5 is a partial enlarged view of the directional functional structure layer shown in Figure 4.
  • Figure 6 is a structural view of the nano-diffraction grating shown in Figure 4 in the XY plane;
  • Figure 7 is a structural view of the nano-diffraction grating shown in Figure 4 in the XZ plane;
  • FIG. 8 is a cross-sectional structural diagram of a naked-eye 3D display device according to an embodiment of the present invention.
  • FIG. 9 is a schematic plan view showing a planar structure of a liquid crystal display panel in the naked-eye 3D display device shown in FIG. 8;
  • Fig. 10 is a view showing the optical path of the naked-eye 3D display device shown in Fig. 8.
  • FIG. 1 is a schematic cross-sectional structural view of the directional color filter
  • FIG. 2 is a schematic view of the directional color filter.
  • a schematic diagram of a planar structure, the directional color filter includes a color filter 1 and a directional functional structure layer 2 on the light exit surface of the color filter 1.
  • the color filter 1 includes a plurality of filter units 10 arranged in an array, each filter unit 10 including at least three filter subunits 100 of different colors, wherein the filter subunits 100 of the same color are transmitted.
  • the color of the light is the same.
  • the filter unit 10 may include three different color filter subunits 100, which may include a red filter subunit R1, a green filter subunit G1, and a blue filter subunit B1, and a red filter.
  • the unit R1 transmits only red light
  • the green filter sub-unit G1 transmits only green light
  • the blue filter sub-unit B1 transmits only blue light. That is to say, the diaphragm corresponding to the red filter sub-unit R1 region transmits only red light, and the light of other colors cannot pass through, and the diaphragm corresponding to the green filter sub-unit G1 region transmits only green light, and other colors of light cannot pass through.
  • the filter unit may include four filter subunits of a red filter subunit, a green filter subunit, a blue filter subunit, and a white filter subunit.
  • the directional functional structure layer 2 includes a plurality of arrayed structural units 20, each structural unit 20 is disposed corresponding to a filter unit 10, and each structural unit 20 further includes at least three structural sub-units 200.
  • Each of the structural sub-units 200 is disposed corresponding to a filter sub-unit 100 such that light of the same color transmitted through each of the filter sub-units 100 is incident into a corresponding one of the structural sub-units 200.
  • the corresponding setting means that the projection of the filter subunit 100 completely covers the projection of the structural subunit 200 in a direction perpendicular to the directional color filter panel, or the projection of the filter unit 10 completely covers the structural unit 20 Projection.
  • each of the structural sub-units 200 further includes a plurality of array-arranged nano-scale diffraction gratings, that is, nano-diffraction gratings 2000.
  • the nano-diffraction grating 2000 in the same structural sub-unit 200 The period and orientation angle are different such that light of the same color that passes through the same structural sub-unit 200 has a different viewing angle, such that the transmitted light propagates in different directions.
  • the period and the orientation angle of the nano-diffraction grating 2000 at the same position in the structural sub-unit 200 corresponding to the filter sub-units 100 of different colors in the same structural unit 20 are also different, so that the lights of different colors synthesizing the same view image have the same Perspective.
  • each structural unit 20 includes three structural subunits 200 including a first structural subunit 200a, a second structural subunit 200b, and a third structural subunit 200c, and the first structure
  • the subunit 200a is disposed corresponding to the red filter subunit R1
  • the second structure subunit 200b is disposed corresponding to the green filter subunit G1
  • the third structure subunit 200c is disposed corresponding to the blue filter subunit B1.
  • each of the three structural subunits further includes 2 ⁇ 2 nano diffraction gratings, that is, the first structural subunit 200a includes four nano-diffraction gratings 2001a, 2001b, 2001c, and 2001d, and the second structural sub-structure Unit 200b includes four nano-diffraction gratings 2002a, 2002b, 2002c, and 2002d, and third structural sub-unit 200c includes four nano-diffraction gratings 2003a, 2003b, 2003c, and 2003d.
  • the four nano-diffraction gratings 2001a, 2001b, 2001c and 2001d have different periods and orientation angles, so that the red light transmitted through the four nano-diffraction gratings has four different viewing angles, 2002a, 2002b, 2002c and 2002d.
  • the period and orientation angles of the four nano-diffraction gratings are different, so that the green light transmitted through the four nano-diffraction gratings has four different viewing angles, and the periodicity of the four nano-diffraction gratings of 2003a, 2003b, 2003c and 2003d
  • the orientation angles are all different so that the blue light transmitted through the four nano-diffraction gratings has four different viewing angles.
  • the period and orientation angles of the three nano-diffraction gratings of 2001a, 2002a and 2003a are different.
  • the three nano-diffraction gratings of 2001b, 2002b and 2003b have different periods and orientation angles.
  • the three nano-diffractions of 2001c, 2002c and 2003c are different.
  • the period and orientation angle of the grating are different.
  • the period and orientation angles of the three nano-diffraction gratings of 2001d, 2002d and 2003d are different, so that the light of different colors synthesizing the same view image has the same viewing angle.
  • the light emitted by the nano-diffraction grating at the same position in each structural sub-unit 200 converges at a viewpoint to provide a light source for the same view image.
  • the light beams emitted by the three nano-diffraction gratings 2001a, 2002a, and 2003a have the same viewing angle and can be concentrated at one viewpoint 1; 2001b, The light emitted by the three nano-diffraction gratings of 2002b and 2003b converges on one viewpoint 2; the light emitted by the three nano-diffraction gratings 2001c, 2002c and 2003c converges at one viewpoint 3; the three nano-diffraction gratings of 2001d, 2002d and 2003d are emitted
  • the light converges at a viewpoint 4. That is, the directional color filter shown in FIG. 5 is capable of providing a light source for images of four different viewing angles.
  • the number of viewpoints of the directional color filter corresponds to the number of nano-diffraction gratings in each structural sub-unit. If there are two viewpoints, there are two nano-diffraction gratings in each structure sub-unit; if there are four viewpoints, each structure sub-unit has 2 ⁇ 2 or 4 nano-diffraction gratings; if there are nine viewpoints, Each structural subunit has 3 x 3 or 9 nano-diffraction gratings. From this, it can be seen that the display resolution of the 3D image formed by the directional color filter in the present embodiment is at least two times higher than the display resolution of the normal 2D image.
  • the red light transmitted through the first structural sub-unit 200a is different from the green light transmitted through the second structural sub-unit 200b and the blue light transmitted through the third structural sub-unit 200c, if the three structural sub-units
  • the periodicity and orientation angle of the nano-diffraction grating structure at the same position are the same.
  • the periodicity and orientation angle of the nano-diffraction gratings 2001a, 2002a, and 2003a are the same, then the red light passing through the nano-diffraction grating 2001a and the nano-diffraction grating 2002a are transmitted.
  • the diffraction angle of the green light and the blue light transmitted through the nano-diffraction grating 2003a must be different, which causes the red light emitted from the nano-diffraction grating 2001a, the green light emitted from the nano-diffraction grating 2002a, and the blue light emitted from the nano-diffraction grating 2003a not to be in the same focus.
  • the light angles of the three colors are different, so that the light of the three colors cannot be combined into the color image of the same viewing angle according to the principle of three primary colors.
  • the period and the orientation angle of the nano-diffraction grating in the first structure sub-unit 200a in this embodiment are set according to the wavelength of the red light transmitted through the red filter sub-unit R1 and the incident angle
  • the second structure is
  • the period and orientation angle of the nano-diffraction grating in unit 200b are set according to the wavelength of the green light transmitted through the green filter sub-unit G1 and the angle of incidence
  • the period and orientation angle of the nano-diffraction grating in the third structure sub-unit 200c It is set according to the wavelength of the blue light transmitted through the blue filter sub-unit B1 and the incident angle.
  • the period and orientation angle of the nano-diffraction grating are determined by the wavelength of the incident ray, the angle of incidence, the diffraction angle of the diffracted ray, and the diffraction azimuth.
  • FIG. 6 is a structural diagram of the nano-diffraction grating 2001a in the XY plane
  • FIG. 7 is a nano-diffraction grating. 2001a structure diagram under the XZ plane. According to the grating equation, the period and orientation angle of the nano-diffraction grating satisfy the following relationship:
  • the incident light A is incident on the nano-diffraction grating at a certain incident angle
  • ⁇ 1 represents the diffraction angle of the diffracted light B emitted by the nano-diffraction grating, that is, the angle between the diffracted ray and the positive direction of the z-axis
  • ⁇ 1 represents the azimuth of the diffracted light B.
  • the angle between the diffracted ray and the positive direction of the x-axis, ⁇ represents the incident angle of the incident ray A, that is, the angle between the incident ray and the positive direction of the z-axis
  • ⁇ represents the wavelength of the incident ray A
  • ⁇ represents the period of the nano-diffraction grating, and ⁇ represents the nanometer.
  • the orientation angle of the diffraction grating is the angle between the groove direction of the nano-diffraction grating and the positive direction of the y-axis
  • n represents the refractive index of the incident ray A in the medium.
  • the period and orientation angle of the desired nano-diffraction grating can be calculated according to the above two formulas. For example, red light of a wavelength of 650 nm is incident at an angle of 60°, a diffraction angle of light is 10°, and a diffraction azimuth angle is 45°.
  • the period of the corresponding nano-diffraction grating is calculated to be 550 nm, and the orientation angle is ⁇ 5.96°.
  • n ⁇ m nano-diffraction gratings can constitute n ⁇ m off-axis Fresnel structures with different focal points, and thus n ⁇ m different can be obtained.
  • n is a natural number greater than or equal to 1
  • m is a natural number greater than or equal to 2.
  • the holographic image is an image carrying amplitude and phase information
  • the entire image at different viewing angles can be seen at different viewing points in the space, and the images do not interfere with each other, and the three-dimensional information can be reproduced realistically without visual fatigue.
  • the stereoscopic display effect is independent of the distance of the observer. Therefore, by using the directional color filter provided by the embodiment and the laser light source and the liquid crystal display panel, the multi-view naked-eye 3D display effect without visual fatigue can be realized.
  • the directional functional structure layer 2 can be directly formed on the color filter 1, or The directional functional structure layer 2 is attached to the color filter 1 by lamination.
  • the directional functional structure layer 2 is attached to the color filter 1 by lamination.
  • the directional color filter is fabricated by photolithography, ultraviolet continuous space frequency lithography or nano imprint technology, and the UV continuous variable space lithography technology is referred to the application number CN201310166341.1.
  • the function of the directional color filter is to converge the light constituting each view image to the vicinity of the observation position, and to generate a separate viewpoint in the space to form a horizontally distributed observation light field (window).
  • the structural unit of the directional color filter comprises a structural subunit corresponding to the sub-pixel of the viewing angle image
  • the structural subunit further comprises an array combination of nano-diffraction gratings designed according to the holographic principle, and the array combination may be a set of nano-diffraction gratings.
  • a diffraction array formed by a plurality of sets of nano-diffraction gratings, wherein the incident light is wavefront-converted by the diffraction array, and the diffracted light is projected onto a space in front of the display screen to form a convergence viewpoint, thereby ensuring that each view image does not crosstalk in space.
  • the light is color-separated and filtered by the corresponding filter sub-unit before being incident on the nano-diffraction grating in the directional functional structure layer. Therefore, the same nano-diffraction grating does not appear.
  • the two colors of light are emitted, which causes the crosstalk of the emitted light to appear, and the directional color filter in this embodiment does not need to adopt a high-precision lens, prism, etc., and the directional color filter is in the technology. It is easier to implement, and therefore, the fatigue-free multi-view naked-eye 3D display device based on the directional backlight technology of the present invention can be practically applied.
  • the naked-eye 3D display device includes a directional color filter 3 and a light source disposed on the light-incident side of the directional color filter 3.
  • the array 4 and the liquid crystal display panel 5 disposed on the light outgoing side of the directional color filter 3 are provided.
  • the light source array 4 includes at least three types of laser point light sources, and different types of laser point light sources emit different colors of laser light, and the laser point light sources are used to emit at a preset position to be incident on the directional color filter 3 at a predetermined angle.
  • laser The laser point source in this embodiment includes a laser that emits laser light and a laser beam expander disposed on the light exit path of the laser, the laser beam expander for expanding the diameter of the laser to irradiate the laser to the directional color filter 3 On the entire panel.
  • the light source array 4 in this embodiment includes a red laser point light source 40 that emits red light, a green laser point light source 41 that emits green light, and a blue laser point light source 42 that emits blue light.
  • the center of the plane of the directional color filter 3 is taken as the origin, perpendicular to the exit surface of the directional color filter 3, and the direction of the observation is the positive direction of the Z axis, then the three laser point sources are at the X The origin position in the axial direction, in the YZ plane, the three laser point sources are at the same position in the Y-axis direction and at different positions in the negative direction of the Z-axis.
  • the angle of the laser point source, the wavelength of the outgoing light, and the angle of the outgoing light that is, the angle at which the light is incident on the directional color filter affects the period and orientation angle of the nano-diffraction grating in the directional color filter 3, therefore,
  • the laser point source emits laser light incident on the directional color filter 3 at a predetermined angle at a preset position, the period and orientation angle of the nano-diffraction grating in the directional color filter 3 can be determined.
  • the structure and the function of the directional color filter 3 in this embodiment are the same as those of the directional color filter provided in the above embodiments. Reference may be made to FIG. 1 to FIG. 4 and related descriptions, and details are not described herein again.
  • the directional color filter 3 synthesizes the light of the same color through the same filter sub-unit by adjusting the phase of the light passing through the filtered photo sub-unit and the corresponding structural sub-unit to synthesize different colors of the same view image. The light has the same angle of view.
  • the liquid crystal display panel 5 of the present embodiment includes a plurality of pixel units 50, each of which further includes at least three sub-pixels 500, each of which is disposed corresponding to a filter unit 10.
  • the sub-pixels 500 in the same pixel unit 50 are disposed in one-to-one correspondence with the filter sub-units 100 in the corresponding filter unit 10, and the liquid crystal display panel adjusts the amplitude of the light transmitted through the sub-pixels 500 to make different colors of the same viewing angle.
  • the light is synthesized into the same view image, and the images of different viewing angles are combined to form a 3D display image.
  • the filter unit 10 in the directional color filter 3 of the present embodiment includes three filter subunits 100, and the three filter subunits include a red filter subunit.
  • R1, green filter subunit G1 and blue filter subunit B1, and red filter subunit R1 transmits only red light
  • the color filter sub-unit G1 transmits only green light
  • the blue filter sub-unit B1 transmits only blue light.
  • the structural unit 20 in the directional color filter 3 includes three structural sub-units 200 including a first structural sub-unit 200a, a second structural sub-unit 200b, and a third structural sub-unit 200c.
  • the pixel unit 50 in the liquid crystal display panel 5 includes three sub-pixels 500 including a red sub-pixel R2, a green sub-pixel G2, and a blue sub-pixel B2, and the red sub-pixel R2 and the first structural sub-unit 200a and red
  • the filter sub-unit R1 is disposed correspondingly, and the green sub-pixel G2 is disposed corresponding to the second structure sub-unit 200b and the green filter sub-unit G1, and the blue sub-pixel B2 is disposed corresponding to the third structure sub-unit 200c and the blue filter sub-unit B1.
  • the first structure sub-unit 200a includes nano-diffraction gratings 2001a to 2001d
  • the second structure sub-unit 200b includes nano-diffraction gratings 2002a to 2002d
  • the third structure sub-unit 200c includes nano-diffraction gratings 2003a to 2003d.
  • 2001a, 2002a, and 2003a correspond to viewpoints 1, 2001b, 2002b, and 2003b corresponding viewpoints 2, 2001c, 2002c, and 2003c corresponding viewpoints 3, 2001d, 2002d, and 2003d corresponding to viewpoint 4, so that viewpoint separation of four perspective images can be realized, each The viewpoint corresponds to an image.
  • each view image is separated into three monochromatic images by red, green and blue.
  • the red laser spot light source 40 emitting red light is diffused and projected onto the directional color filter 3, pointing Only the red filter sub-unit R1 of the color filter 3 can transmit red light and transmit the red light to the structural subunit corresponding to the directional functional structure layer, and the structural subunit includes four nano-diffraction gratings of 2001a to 2001d.
  • the structure is such that the red light transmitted through the structural sub-unit forms four focal points on a horizontal line at a certain distance in front of the liquid crystal display panel 5, and then the image is separated by a plurality of angles by red sub-pixels on the liquid crystal display panel to form a red laser-based image.
  • the single color naked eye 3D of the point light source 40 is such that the red light transmitted through the structural sub-unit forms four focal points on a horizontal line at a certain distance in front of the liquid crystal display panel 5, and then the image is separated by a plurality of angles by red sub-pixels on the liquid
  • the directional filter is filtered by the directional color filter 3, and then projected to the directional function.
  • the corresponding structural subunits on the structural layer are displayed in a spatial stereoscopic image in space by diffraction of the nano-diffraction grating in the directional functional structure layer.
  • the liquid crystal display panel 5 of the present embodiment includes an array substrate, an opposite substrate, and a liquid crystal layer disposed between the array substrate and the opposite substrate.
  • the array substrate has a plurality of pixel electrodes facing the liquid crystal layer, and the opposite substrate faces One side of the liquid crystal layer has a common electrode, and the plurality of pixel electrodes, the common electrode, and a liquid crystal layer therebetween constitute the plurality of sub-pixels.
  • the array substrate further includes a driving circuit that adjusts the transmission of the sub-pixel by adjusting a voltage difference between the pixel electrode and the common electrode The luminous flux of light.
  • the driving circuit can display the left eye image by transmitting light of the sub-pixel corresponding to the left eye image in the first timing control, and display the right eye image by transmitting the sub-pixel corresponding to the right eye image in the second timing control, and the human brain is
  • the high-resolution 3D image can be formed by superimposing the left and right eye images.
  • the left eye image and the right eye image in this embodiment are multi-view images, and any two consecutive view images can realize the 3D display effect. Therefore, the naked-eye 3D display device in this embodiment can ensure the 3D effect at different viewing distances.
  • the naked-eye 3D display device in this embodiment can also realize two-dimensional planar display, that is, the naked-eye 3D display device in this embodiment can Switching between stereoscopic image display and flat image display is achieved.
  • the driving circuit simultaneously controls the sub-pixel corresponding to the left-eye image and the sub-pixel corresponding to the right-eye image to display the planar image.
  • the structure, the driving method and the display mode of the liquid crystal display panel 5 in the present invention are not limited thereto, as long as they can be combined with the laser point light source and the directional color filter to form a naked eye 3D display device without visual fatigue and multiple viewing angles. can.
  • the size of the pixel unit of a single image satisfying the resolution of the human eye is 800 um, and the existing technology can realize the pixel of 20 um size.
  • the production of the unit therefore, can theoretically achieve a projection of 1600 viewpoints, so that a realistic stereoscopic image can be formed.
  • the period of the nano-diffraction grating can be 430 nm or even higher, and the diffusion range of the viewing angle image can reach 150° or even higher.
  • the period of the nano-diffraction grating ranges from 430 nm to 650 nm according to the grating equation.
  • the filter unit of the directional color filter 3 includes a red filter subunit, a green filter subunit, and a blue filter subunit, then the red filter subunit, the green filter subunit, and the blue
  • the color filter subunit may have a size of 80 micrometers by 240 micrometers and constitute a filter unit of 240 micrometers by 240 micrometers. If the directional color filter 3 has two viewpoints, the size of the filter subunit is 80 ⁇ m ⁇ 120 ⁇ m. If there are four viewpoints, the size of the filter subunit is 40 micrometers x 120 micrometers. If there are six viewpoints, the size of the filter subunit is 40 micrometers by 60 micrometers.
  • the period of the nano-diffraction grating can be 300 nm to 3 ⁇ m according to the grating equation.
  • the period of the nano-diffraction grating inside the structural subunit can be 300 nm, visible to the visible
  • the diffraction angle of the light wavelength at different incident angles can reach 90 degrees. Therefore, in theory, the numerical aperture of the directional color filter 3 for the light field imaging convergence in the present invention can be greater than 1, and the opening angle of the corresponding viewpoint can be close to 180 degrees. It can actually reach 150 degrees.
  • the directional color filter comprises a continuous variable frequency space nano-diffraction grating array
  • the laser point source comprises red green blue
  • the three-color laser and the beam expander can use the nano-diffraction grating on the directional color filter to perform light field wavefront conversion on the light emitted from the laser point source, form a convergence viewpoint in the space, and provide a light source for forming a plurality of viewing angle images.
  • the multi-view images on the liquid crystal display panel are spatially separated to form a multi-viewpoint corresponding to the multi-view image, and the images do not cross each other.
  • the 3D observed in the window range does not cause visual fatigue, and there is no distance limitation.
  • the laser light source with three monochromatic wavelengths of red, green and blue is used to illuminate, and the formed 3D image is not affected by color blur.
  • the 3D image has a large depth of field and a wide color gamut.
  • the color filter is filtered by the corresponding filter sub-unit, so that the same nano-diffraction grating does not appear. a color of light that causes crosstalk problems in the emitted light;
  • the naked-eye 3D display device in this embodiment does not need to adopt a high-precision lens, a prism, or the like, and the directional color filter is technically easy to implement. Therefore, the directional laser-based backlight technology provided by the present invention is not provided. A fatigued multi-view naked-eye 3D display device can be put to practical use.

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Abstract

一种指向性彩色滤光片和裸眼3D显示装置，包括彩色滤光片（1）和指向性功能结构层（2）；彩色滤光片（1）包括多个滤光单元（10），每一滤光单元（10）包括至少三个不同颜色的滤光子单元（100）；指向性功能结构层（2）包括多个结构单元（20），每一结构单元（20）与一滤光单元（10）对应设置；每一结构单元（20）包括至少三个结构子单元（200）；每一结构子单元（200）与一滤光子单元（100）对应设置；每一结构子单元（200）包括多个纳米衍射光栅（2000）；同一结构子单元（200）内的纳米衍射光栅（2000）的周期和取向角不同，从而不会出现同一纳米衍射光栅（2000）出射两种颜色的光，导致光线串扰的问题，且该指向性彩色滤光片在技术上较容易实现，使得基于指向性背光技术的无视觉疲劳的多视角的裸眼3D显示装置较易得到实际应用。

Description

指向性彩色滤光片和裸眼3D显示装置
本申请要求于2015年11月13日提交中国专利局、申请号为201510778086.5、发明名称为“指向性彩色滤光片和裸眼3D显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及立体显示技术领域，更具体地说，涉及一种指向性彩色滤光片和裸眼3D显示装置。
背景技术
由于3D显示技术可以使画面变得更加立体逼真，让观众有一种身临其境的感觉，因此，3D显示技术越来越受到人们的欢迎。
3D显示技术的原理是利用人的左右眼分别接收具有视差的不同画面，然后通过大脑对视差图像叠加构成一个具有前后、左右、上下、远近等立体方向效果的影像。虽然现有技术中不断有基于视差原理的裸眼3D显示器件产生，但是，由于现有的裸眼3D显示器件具有图像串扰易引起视觉疲劳以及视角小等问题，因此，现有的裸眼3D显示器件并未真正进入消费电子产品领域。
现有技术提出了一种新的3D显示技术即指向性背光技术，该技术是在导光板上加工特殊设计的结构来使光线传播指向不同的方向，以形成视角较大的视差照明。如中国专利CN201410187534.X提出一种裸眼3D背光模组，其采用一组或多组LED时序光源结合凸透镜、多边棱镜以及视差屏障来实现多视角3D显示。但是，由于这种背光模组的透镜、棱镜等结构的设计和精密加工精度在技术上很难实现，并且，当两个光源的光入射到视差屏障的同一个区域时，会导致该区域同时出射两种颜色的光，即导致该区域出射的光线出现串扰，因此，基于指向性背光技术的裸眼3D显示器件一直未能得到实际应用。
发明内容
有鉴于此，本发明提供了一种指向性彩色滤光片和裸眼3D显示装置，以解决现有技术中由于背光模组的透镜、棱镜等结构的设计和精密加工精度在技术上很难实现且很容易出现光线串扰的问题。
为实现上述目的，本发明提供如下技术方案：
一种指向性彩色滤光片，包括彩色滤光片和位于所述彩色滤光片出光面的指向性功能结构层；
所述彩色滤光片包括多个滤光单元，每一所述滤光单元包括至少三个不同颜色的滤光子单元，其中透过同一颜色的滤光子单元的光的颜色相同；
所述指向性功能结构层包括多个结构单元，每一所述结构单元与一所述滤光单元对应设置；每一所述结构单元包括至少三个结构子单元；每一所述结构子单元与一所述滤光子单元对应设置，以使透过每一所述滤光子单元的光入射到对应的一所述结构子单元中；
每一所述结构子单元包括多个纳米衍射光栅；同一结构子单元内的纳米衍射光栅的周期和取向角不同，以使透过同一结构子单元的相同颜色的光具有不同的视角；同一滤光单元不同颜色的滤光子单元对应的结构子单元内相同位置的纳米衍射光栅的周期和取向角也不同，以使合成同一视角图像的不同颜色的光具有相同的视角。
优选的，所述滤光单元包括红色滤光子单元、绿色滤光子单元和蓝色滤光子单元，且所述红色滤光子单元仅透射红光，所述绿色滤光子单元仅透射绿光，所述蓝色滤光子单元仅透射蓝光；
所述结构单元包括第一结构子单元、第二结构子单元和第三结构子单元，所述第一结构子单元与所述红色滤光子单元对应设置，所述第二结构子单元与所述绿色滤光子单元对应设置，所述第三结构子单元与所述蓝色滤光子单元对应设置。
优选的，所述纳米衍射光栅的周期和取向角由入射光线的波长、入射角、衍射光线的衍射角和衍射方位角决定。
优选的，所述指向性彩色滤光片采用光刻技术、紫外连续变空频光刻技术或纳米压印技术制作而成。
优选的，所述指向性彩色滤光片对应视点的张角达到150度及以上。
优选的，所述指向性彩色滤光片中的纳米衍射光栅的周期范围为300纳米～3微米。
一种裸眼3D显示装置，包括指向性彩色滤光片、设置在所述指向性彩色滤光片入光侧的光源阵列和设置在所述指向性彩色滤光片出光侧的液晶显示面板；
所述光源阵列包括至少三种激光点光源，不同种类的激光点光源发射的激光颜色不同，所述激光点光源用于在预设位置发射以预设角度入射到所述指向性彩色滤光片的激光；
所述指向性彩色滤光片为如上任一项所述的指向性彩色滤光片，所述指向性彩色滤光片通过调整透过所述滤光子单元和对应的结构子单元的激光的相位，来使透过同一滤光子单元的相同颜色的光具有不同的视角，合成同一视角图像的不同颜色的光具有相同的视角；
所述液晶显示面板包括多个像素单元，每一所述像素单元包括至少三个子像素，每一所述像素单元与一所述滤光单元对应设置，同一所述像素单元内的子像素与对应的所述滤光单元内的滤光子单元一一对应设置，所述液晶显示面板通过调整透过所述子像素的激光的振幅，来使相同视角的不同颜色光合成同一视角图像，不同视角的图像合成3D显示图像。
优选的，所述激光点光源包括发射激光的激光器以及设置在所述激光器出光路径上的激光扩束器，所述激光扩束器用于扩展所述激光的直径，以使所述激光照射到所述指向性彩色滤光片的整个面板上。
优选的，所述光源阵列包括发射红光的红激光点光源、发射绿光的绿激光点光源和发射蓝光的蓝激光点光源。
优选的，所述至少三个不同颜色的滤光子单元包括红色滤光子单元、绿色滤光子单元和蓝色滤光子单元，所述红色滤光子单元仅透射红激光，所述绿色滤光子单元仅透射绿激光，所述蓝色滤光子单元仅透射蓝激光；
所述至少三个结构子单元包括第一结构子单元、第二结构子单元和第三结构子单元；所述至少三个子像素包括红色子像素、绿色子像素和蓝色子像素；
所述红色子像素与所述第一结构子单元和所述红色滤光子单元对应设置，所述绿色子像素与所述第二结构子单元和所述绿色滤光子单元对应设置，所述 蓝色子像素与所述第三结构子单元和所述蓝色滤光子单元对应设置。
与现有技术相比，本发明所提供的技术方案具有以下优点：
本发明所提供的指向性彩色滤光片和裸眼3D显示装置，光线在入射到指向性功能结构层中的纳米衍射光栅之前，通过对应的滤光子单元进行了分色滤光，因此，不会出现同一纳米衍射光栅出射两种颜色的光，导致出射的光线出现串扰的问题；
并且，本发明中不需要采用高精度的透镜、棱镜等结构，且指向性彩色滤光片在技术上较容易实现，因此，本发明提供的基于指向性背光技术的无疲劳的多视角裸眼3D显示器件能够得到实际应用。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明一个实施例提供的指向性彩色滤光片的剖面结构示意图；
图2为本发明一个实施例提供的指向性彩色滤光片的平面结构示意图；
图3为图1所示的指向性彩色滤光片中彩色滤光片的平面结构示意图；
图4为图1所示的指向性彩色滤光片中指向性功能结构层的平面结构示意图；
图5为图4所示的指向性功能结构层的局部放大图；
图6为图4所示的纳米衍射光栅在XY平面下的结构图；
图7为图4所示的纳米衍射光栅在XZ平面下的结构图；
图8为本发明一个实施例提供的裸眼3D显示装置的剖面结构示意图；
图9为图8所示的裸眼3D显示装置中液晶显示面板的平面结构示意图；
图10为图8所示的裸眼3D显示装置的光路图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的一个实施例提供了一种指向性彩色滤光片，参考图1和图2，图1为该指向性彩色滤光片的剖面结构示意图，图2为该指向性彩色滤光片的平面结构示意图，该指向性彩色滤光片包括彩色滤光片1和位于彩色滤光片1出光面的指向性功能结构层2。
参考图3，彩色滤光片1包括多个阵列排布的滤光单元10，每一滤光单元10包括至少三个不同颜色的滤光子单元100，其中透过同一颜色的滤光子单元100的光的颜色相同。
具体地，滤光单元10可以包括三个不同颜色的滤光子单元100，这三个滤光子单元可以包括红色滤光子单元R1、绿色滤光子单元G1和蓝色滤光子单元B1，且红色滤光子单元R1仅透射红光，绿色滤光子单元G1仅透射绿光，蓝色滤光子单元B1仅透射蓝光。也就是说，红色滤光子单元R1区域对应的膜片只透射红光、其他颜色的光不能透过，绿色滤光子单元G1区域对应的膜片只透射绿光、其他颜色的光不能透过，蓝色滤光子单元B1区域对应的膜片只透射蓝光、其他颜色的光不能透过。当然，本发明并不仅限于此，例如，在其他实施例中滤光单元可以包括红色滤光子单元、绿色滤光子单元、蓝色滤光子单元和白色滤光子单元这四个滤光子单元。
参考图4，指向性功能结构层2包括多个阵列排布的结构单元20，每一结构单元20与一滤光单元10对应设置，每一结构单元20又包括至少三个结构子单元200，每一结构子单元200与一滤光子单元100对应设置，以使透过每一滤光子单元100的相同颜色的光入射到对应的一结构子单元200中。本实施例中，对应设置是指在垂直于指向性彩色滤光片面板的方向上，滤光子单元100的投影完全覆盖结构子单元200的投影，或滤光单元10的投影完全覆盖结构单元20的投影。
本实施例中，每一结构子单元200还包括多个阵列排布的纳米级别的衍射光栅即纳米衍射光栅2000。其中，同一结构子单元200内的纳米衍射光栅2000 的周期和取向角不同，以使透过同一结构子单元200的相同颜色的光具有不同的视角即使得透过的光线传播指向不同的方向。其中，同一结构单元20内对应不同颜色的滤光子单元100的结构子单元200中相同位置的纳米衍射光栅2000的周期和取向角也不同，以使合成同一视角图像的不同颜色的光具有相同的视角。
参考图5，假设每一结构单元20包括三个结构子单元200，这三个结构子单元包括第一结构子单元200a、第二结构子单元200b和第三结构子单元200c，且第一结构子单元200a与红色滤光子单元R1对应设置、第二结构子单元200b与绿色滤光子单元G1对应设置、第三结构子单元200c与蓝色滤光子单元B1对应设置。
进一步地，这三个结构子单元中每一结构子单元又包括2×2个纳米衍射光栅，即第一结构子单元200a包括2001a、2001b、2001c和2001d四个纳米衍射光栅，第二结构子单元200b包括2002a、2002b、2002c和2002d四个纳米衍射光栅，第三结构子单元200c包括2003a、2003b、2003c和2003d四个纳米衍射光栅。
其中，2001a、2001b、2001c和2001d这四个纳米衍射光栅的周期和取向角均不同，以使透过这四个纳米衍射光栅的红光具有四个不同的视角，2002a、2002b、2002c和2002d这四个纳米衍射光栅的周期和取向角均不同，以使透过这四个纳米衍射光栅的绿光具有四个不同的视角，2003a、2003b、2003c和2003d这四个纳米衍射光栅的周期和取向角均不同，以使透过这四个纳米衍射光栅的蓝光具有四个不同的视角。
并且，2001a、2002a和2003a这三个纳米衍射光栅的周期和取向角均不同，2001b、2002b和2003b这三个纳米衍射光栅的周期和取向角均不同，2001c、2002c和2003c这三个纳米衍射光栅的周期和取向角均不同，2001d、2002d和2003d这三个纳米衍射光栅的周期和取向角均不同，以使合成同一视角图像的不同颜色的光具有相同的视角。
其中，每一结构子单元200内相同位置的纳米衍射光栅出射的光线会聚于一个视点，为同一视角图像提供光源。参考图5，2001a、2002a和2003a这三个纳米衍射光栅出射的光线具有相同的视角，能够会聚于一个视点1；2001b、 2002b和2003b这三个纳米衍射光栅出射的光线会聚于一个视点2；2001c、2002c和2003c这三个纳米衍射光栅出射的光线会聚于一个视点3；2001d、2002d和2003d这三个纳米衍射光栅出射的光线会聚于一个视点4。也就是说，图5所示的指向性彩色滤光片能够为4个不同视角的图像提供光源。
本实施例中，指向性彩色滤光片的视点个数与每个结构子单元内的纳米衍射光栅的个数对应。若有两个视点，则每个结构子单元内有两个纳米衍射光栅；若有四个视点，则每个结构子单元有2×2即4个纳米衍射光栅；若有九个视点，则每个结构子单元有3×3即9个纳米衍射光栅。由此可知，本实施例中的指向性彩色滤光片形成的3D图像的显示分辨率比通常的2D图像的显示分辨率至少提高2倍以上。
由于透过第一结构子单元200a的红光与透过第二结构子单元200b的绿光以及透过第三结构子单元200c的蓝光的波长不同，因此，若这三个结构子单元中的相同位置的纳米衍射光栅结构的周期和取向角都相同，如纳米衍射光栅2001a、2002a和2003a的周期和取向角相同，那么，透过纳米衍射光栅2001a的红光、透过纳米衍射光栅2002a的绿光与透过纳米衍射光栅2003a的蓝光的衍射角必定不同，这就会导致纳米衍射光栅2001a出射的红光、纳米衍射光栅2002a出射的绿光和纳米衍射光栅2003a出射的蓝光不在同一个焦点上即这三种颜色的光的视角不同，从而不能根据三基色原理将这三种颜色的光合成同一视角的彩色图像。
也就是说，本实施例中第一结构子单元200a中的纳米衍射光栅的周期和取向角是根据透过红色滤光子单元R1的红光的波长和入射角对应设定的，第二结构子单元200b中的纳米衍射光栅的周期和取向角是根据透过绿色滤光子单元G1的绿光的波长和入射角对应设定的，第三结构子单元200c中的纳米衍射光栅的周期和取向角是根据透过蓝色滤光子单元B1的蓝光的波长和入射角对应设定的。
具体地，纳米衍射光栅的周期和取向角是由入射光线的波长、入射角、衍射光线的衍射角和衍射方位角决定的。以纳米衍射光栅2001a为例，参考图6和图7，图6是纳米衍射光栅2001a在XY平面下的结构图，图7是纳米衍射光栅 2001a在XZ平面下的结构图。根据光栅方程，纳米衍射光栅的周期、取向角满足以下关系：
Figure PCTCN2015100166-appb-000001
Figure PCTCN2015100166-appb-000002
其中，入射光线A以一定的入射角入射到纳米衍射光栅，θ1表示纳米衍射光栅出射的衍射光B的衍射角即衍射光线与z轴正方向的夹角，φ1表示衍射光B的方位角即衍射光线与x轴正方向的夹角，θ表示入射光线A的入射角即入射光线与z轴正方向的夹角，λ表示入射光线A的波长，Λ表示纳米衍射光栅的周期，φ表示纳米衍射光栅的取向角即纳米衍射光栅槽型方向与y轴正方向的夹角，n表示入射光线A在介质中的折射率。
也就是说，在规定好入射光线的波长、入射角以及衍射光线的衍射角和衍射方位角之后，就可以根据上述两个公式计算出所需的纳米衍射光栅的周期和取向角了。例如，650nm波长的红光以60°角入射，光的衍射角为10°、衍射方位角为45°，通过计算得出对应的纳米衍射光栅的周期为550nm，取向角为-5.96°。
按照上述原理设定每个结构单元内各个纳米衍射光栅的周期和取向角后，由于一个纳米衍射光栅相当于单个离轴菲涅尔结构，因此，各个结构子单元中相同位置的纳米衍射光栅出射的光线就可以会聚于一个视点，构成一视角图像。当每个结构子单元内包括n×m个纳米衍射光栅时，n×m个纳米衍射光栅就可以构成n×m个不同焦点的离轴菲涅尔结构，进而可以获得n×m个不同的视点，然后再配合液晶显示面板对颜色和灰度的控制，就能实现多视角的裸眼3D全息图像显示。其中，n为大于或等于1的自然数，m为大于或等于2的自然数。
由于全息图像是一种携带振幅与位相信息的图像，在空间不同观察点均可看到不同视角下的整幅图像，各个图像之间互不干扰，能真实再现三维信息，且不产生视觉疲劳，立体显示效果与观察者的距离无关，因此，将本实施例提供的指向性彩色滤光片和激光光源以及液晶显示面板配合使用，可实现无视觉疲劳的多视角裸眼3D显示效果。
本实施例中，指向性功能结构层2可以直接制作在彩色滤光片1上，也可 通过贴合的方式将指向性功能结构层2贴在彩色滤光片1上。在观看采用彩色滤光片1的指向性彩色滤光片形成的3D图像时，即使观看位置上下变化，看到的3D图像也不会有颜色跳变。如果不采用彩色滤光片1进行分色滤光，而是直接做成指向性功能结构层2的镶嵌结构，虽然也可将红光、绿光和蓝光成像在相同的空间位置，但是，在纳米衍射光栅色散效应的影响下，观看位置上下变化时，容易出现光线的串扰，导致3D图像的颜色发生跳变。
本实施例中，指向性彩色滤光片采用光刻技术、紫外连续变空频光刻技术或纳米压印技术制作而成，所述紫外连续变空频光刻技术参照申请号为CN201310166341.1的中国专利申请记载的光刻设备和光刻方法。需要指出的是，在本实施例中可以采用光刻技术制作出不同指向的纳米衍射光栅，再做出能够用于压印的模板，然后通过纳米压印技术批量压印出纳米衍射光栅构成的结构单元阵列。
本实施例中，指向性彩色滤光片的作用是将构成各视角图像的光会聚到观察位置附近，并在空间产生分离的视点，形成水平分布的观察光场(视窗)。由于指向性彩色滤光片的结构单元包含对应于视角图像子像素的结构子单元，该结构子单元又包括按照全息原理设计的纳米衍射光栅的阵列组合，该阵列组合可以是一组纳米衍射光栅或者多组纳米衍射光栅构成的衍射阵列，通过该衍射阵列对入射光进行波前转换，将衍射光投影在显示屏幕前方的空间上形成会聚视点，即可确保各视角图像在空间上互不串扰。
本实施例提供的指向性彩色滤光片，光线在入射到指向性功能结构层中的纳米衍射光栅之前，通过对应的滤光子单元进行了分色滤光，因此，不会出现同一纳米衍射光栅出射两种颜色的光，导致出射的光线出现串扰的问题，并且，本实施例中的指向性彩色滤光片不需要采用高精度的透镜、棱镜等结构，且指向性彩色滤光片在技术上较容易实现，因此，本发明中基于指向性背光技术的无疲劳的多视角裸眼3D显示器件能够得到实际应用。
本发明的另一个实施例提供了一种裸眼3D显示装置，如图8所示，该裸眼3D显示装置包括指向性彩色滤光片3、设置在指向性彩色滤光片3入光侧的光源阵列4和设置在指向性彩色滤光片3出光侧的液晶显示面板5。
其中，光源阵列4包括至少三种激光点光源，不同种类的激光点光源发射的激光颜色不同，该激光点光源用于在预设位置发射以预设角度入射到指向性彩色滤光片3的激光。本实施例中的激光点光源包括发射激光的激光器以及设置在该激光器出光路径上的激光扩束器，该激光扩束器用于扩展激光的直径，以使激光照射到指向性彩色滤光片3的整个面板上。
可选的，本实施例中的光源阵列4包括发射红光的红激光点光源40、发射绿光的绿激光点光源41和发射蓝光的蓝激光点光源42。可选的，以指向性彩色滤光片3的平面中心为原点，以垂直于指向性彩色滤光片3的出射面且指向观察方向为Z轴正方向，则这三个激光点光源在X轴方向的原点位置，在YZ平面下，这三种激光点光源在Y轴方向的同一个位置上，在Z轴负方向不同位置上。由于激光点光源的位置、出射光线的波长和出射光线的角度即光线入射到指向性彩色滤光片的角度会影响指向性彩色滤光片3中纳米衍射光栅的周期和取向角，因此，当激光点光源在预设位置发射以预设角度入射到指向性彩色滤光片3的激光时，指向性彩色滤光片3中纳米衍射光栅的周期和取向角就可以确定了。
本实施例中的指向性彩色滤光片3的结构和作用与上述实施例提供的指向性彩色滤光片相同，可参考图1～图4以及相关描述，在此不再赘述。该指向性彩色滤光片3通过调整透过滤光子单元和对应的结构子单元的光的相位，来使透过同一滤光子单元的相同颜色的光具有不同的视角，合成同一视角图像的不同颜色的光具有相同的视角。
参考图9和图3，本实施例中的液晶显示面板5包括多个像素单元50，每一像素单元50又包括至少三个子像素500，每一像素单元50与一滤光单元10对应设置，同一像素单元50内的子像素500与对应的滤光单元10内的滤光子单元100一一对应设置，该液晶显示面板通过调整透过子像素500的光的振幅，来使相同视角的不同颜色光合成同一视角图像，不同视角的图像合成3D显示图像。
可选的，参考图3、图5和图9，本实施例中指向性彩色滤光片3中的滤光单元10包括三个滤光子单元100，这三个滤光子单元包括红色滤光子单元R1、绿色滤光子单元G1和蓝色滤光子单元B1，且红色滤光子单元R1仅透射红光，绿 色滤光子单元G1仅透射绿光，蓝色滤光子单元B1仅透射蓝光。指向性彩色滤光片3中的结构单元20包括三个结构子单元200，这三个结构子单元包括第一结构子单元200a、第二结构子单元200b和第三结构子单元200c。液晶显示面板5中的像素单元50包括三个子像素500，这三个子像素包括红色子像素R2、绿色子像素G2和蓝色子像素B2，且红色子像素R2与第一结构子单元200a和红色滤光子单元R1对应设置，绿色子像素G2与第二结构子单元200b和绿色滤光子单元G1对应设置，蓝色子像素B2与第三结构子单元200c和蓝色滤光子单元B1对应设置。
以图5和10为例，第一结构子单元200a包括纳米衍射光栅2001a～2001d、第二结构子单元200b包括纳米衍射光栅2002a～2002d、第三结构子单元200c包括纳米衍射光栅2003a～2003d，且2001a、2002a和2003a对应视点1、2001b、2002b和2003b对应视点2、2001c、2002c和2003c对应视点3、2001d、2002d和2003d对应视点4，这样可以实现4个视角图像的视点分离，每个视点对应一幅图像。
将每个视角图像按红绿蓝三色分离成三幅单色图像，如图10所示，发射红光的红激光点光源40经过扩散后，投影到指向性彩色滤光片3上，指向性彩色滤光片3上只有红色滤光子单元R1能透过红光，并将红光透射到指向性功能结构层对应的结构子单元上，该结构子单元包括2001a～2001d四个纳米衍射光栅结构，使透过该结构子单元的红光在液晶显示面板5前方一定距离上形成4个在一条水平线上的焦点，之后通过液晶显示面板上的红色子像素多角度分离图像，形成基于红激光点光源40的单色裸眼3D。
当红激光点光源40、绿激光点光源41和蓝激光点光源42同时投影到指向性彩色滤光片3上时，经过指向性彩色滤光片3的分色滤光后，投影到指向性功能结构层上各自对应结构子单元，通过指向性功能结构层中纳米衍射光栅的衍射后在空间产生彩色立体图像显示。
本实施例中的液晶显示面板5包括阵列基板、对向基板以及设置在阵列基板和对向基板之间的液晶层，该阵列基板朝向液晶层的一侧具有多个像素电极，对向基板朝向液晶层的一侧具有公共电极，所述多个像素电极、公共电极以及二者之间的液晶层构成所述多个子像素。此外，阵列基板还包括驱动电路，该驱动电路通过调整像素电极与公共电极之间的电压差来调整透过该子像素 的光的光通量。
并且，该驱动电路可以在第一时序控制对应左眼图像的子像素透光来显示左眼图像，在第二时序控制对应右眼图像的子像素透光来显示右眼图像，经过人脑对左右眼图像的叠加后就能形成高分辨率的3D图像，进一步地，本实施例中的左眼图像和右眼图像均为多视角图像，任意两个连续的视角图像都可以实现3D显示效果，因而，本实施例中的裸眼3D显示装置在不同观察距离下都能保证3D效果。
进一步地，如果液晶显示面板5显示的是无视差的平面图像，则本实施例中的裸眼3D显示装置也可以实现二维的平面显示，也就是说，本实施例中的裸眼3D显示装置可以实现立体图像显示与平面图像显示之间的切换。其中，驱动电路同时控制对应左眼图像的子像素和对应右眼图像的子像素进行显示，来显示平面图像。当然，本发明中液晶显示面板5的结构、驱动方式和显示方式并不仅限于此，只要其能够与激光点光源和指向性彩色滤光片结合形成无视觉疲劳且多视角的裸眼3D显示装置即可。
对于实际情况来说，假设液晶显示面板5的尺寸为55英寸，观察距离为3m，则满足人眼分辨率的单幅图像的像素单元的尺寸为800um，由于现有的技术可以实现20um尺寸像素单元的制作，因此，理论上可以实现1600个视点的投射，从而可以形成一个逼真的立体影像。同时，纳米衍射光栅的周期可做到430nm甚至更高，视角图像的扩散范围可以达到150°甚至更高。可选的，按照光栅方程计算，纳米衍射光栅的周期范围为430nm到650nm。
在一个具体地实施例方式中，假设指向性彩色滤光片3的滤光单元包括红色滤光子单元、绿色滤光子单元和蓝色滤光子单元，则红色滤光子单元、绿色滤光子单元和蓝色滤光子单元的尺寸可为80微米×240微米，构成240微米×240微米的滤光单元。如该指向性彩色滤光片3有两个视点，则滤光子单元的尺寸为80微米×120微米。如有四个视点，则滤光子单元的尺寸为40微米×120微米，如有六个视点，则滤光子单元的尺寸为40微米×60微米。
由于结构子单元内部的纳米衍射光栅的分布范围决定了观察视点的视场范围，因此，按照光栅方程计算，纳米衍射光栅的周期范围可为300纳米～3微米。本发明中结构子单元内部的纳米衍射光栅的周期可做到300纳米，对可见 光波长在不同入射角度下的衍射角度可达90度，因此，理论上本发明中指向性彩色滤光片3对光场成像会聚的数值孔径可大于1，对应视点的张角可接近180度，实际可到达150度。
本发明提供的由指向性彩色滤光片、激光点光源和液晶显示面板构成的裸眼3D显示装置中，指向性彩色滤光片包含连续变空频纳米衍射光栅阵列，激光点光源包含红绿蓝三色激光器与扩束器，因而可以利用指向性彩色滤光片上的纳米衍射光栅对激光点光源出射的光进行光场波前转换，在空间形成会聚视点，为形成多个视角图像提供光源，进而通过液晶显示面板上的多视角图像在空间分离，形成与多视角图像对应的多视点，且图像间互不串扰，因此，在视窗范围内观察的3D不产生视觉疲劳，没有距离限制。同时，采用红绿蓝三个单色波长的激光点光源照明，形成的3D图像不受色模糊影响，3D图像的景深大、色域宽。
本实施例提供的裸眼3D显示装置，光线在入射到指向性功能结构层中的纳米衍射光栅之前，通过对应的滤光子单元进行了分色滤光，因此，不会出现同一纳米衍射光栅出射两种颜色的光，导致出射的光线出现串扰的问题；
并且，本实施例中的裸眼3D显示装置不需要采用高精度的透镜、棱镜等结构，且指向性彩色滤光片在技术上较容易实现，因此，本发明提供的基于指向性背光技术的无疲劳的多视角裸眼3D显示器件能够得到实际应用。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种指向性彩色滤光片，其特征在于，包括彩色滤光片和位于所述彩色滤光片出光面的指向性功能结构层；
    所述彩色滤光片包括多个滤光单元，每一所述滤光单元包括至少三个不同颜色的滤光子单元，其中透过同一颜色的滤光子单元的光的颜色相同；
    所述指向性功能结构层包括多个结构单元，每一所述结构单元与一所述滤光单元对应设置；每一所述结构单元包括至少三个结构子单元；每一所述结构子单元与一所述滤光子单元对应设置，以使透过每一所述滤光子单元的光入射到对应的一所述结构子单元中；
    每一所述结构子单元包括多个纳米衍射光栅；同一结构子单元内的纳米衍射光栅的周期和取向角不同，以使透过同一结构子单元的相同颜色的光具有不同的视角；同一滤光单元不同颜色的滤光子单元对应的结构子单元内相同位置的纳米衍射光栅的周期和取向角也不同，以使合成同一视角图像的不同颜色的光具有相同的视角。
  2. 根据权利要求1所述的指向性彩色滤光片，其特征在于，所述滤光单元包括红色滤光子单元、绿色滤光子单元和蓝色滤光子单元，且所述红色滤光子单元仅透射红光，所述绿色滤光子单元仅透射绿光，所述蓝色滤光子单元仅透射蓝光；
    所述结构单元包括第一结构子单元、第二结构子单元和第三结构子单元，所述第一结构子单元与所述红色滤光子单元对应设置，所述第二结构子单元与所述绿色滤光子单元对应设置，所述第三结构子单元与所述蓝色滤光子单元对应设置。
  3. 根据权利要求2所述的指向性彩色滤光片，其特征在于，所述纳米衍射光栅的周期和取向角由入射光线的波长、入射角、衍射光线的衍射角和衍射方位角决定。
  4. 根据权利要求1所述的指向性彩色滤光片，其特征在于，所述指向性彩色滤光片采用光刻技术、紫外连续变空频光刻技术或纳米压印技术制作而成。
  5. 根据权利要求1所述的裸眼3D显示装置，其特征在于，所述指向性 彩色滤光片对应视点的张角达到150度及以上。
  6. 根据权利要求1所述的指向性彩色滤光片，其特征在于，所述指向性彩色滤光片中的纳米衍射光栅的周期范围为300纳米～3微米。
  7. 一种裸眼3D显示装置，其特征在于，包括指向性彩色滤光片、设置在所述指向性彩色滤光片入光侧的光源阵列和设置在所述指向性彩色滤光片出光侧的液晶显示面板；
    所述光源阵列包括至少三种激光点光源，不同种类的激光点光源发射的激光颜色不同，所述激光点光源用于在预设位置发射以预设角度入射到所述指向性彩色滤光片的激光；
    所述指向性彩色滤光片为权利要求1～6任一项所述的指向性彩色滤光片，所述指向性彩色滤光片通过调整透过所述滤光子单元和对应的结构子单元的激光的相位，来使透过同一滤光子单元的相同颜色的光具有不同的视角，合成同一视角图像的不同颜色的光具有相同的视角；
    所述液晶显示面板包括多个像素单元，每一所述像素单元包括至少三个子像素，每一所述像素单元与一所述滤光单元对应设置，同一所述像素单元内的子像素与对应的所述滤光单元内的滤光子单元一一对应设置，所述液晶显示面板通过调整透过所述子像素的激光的振幅，来使相同视角的不同颜色光合成同一视角图像，不同视角的图像合成3D显示图像。
  8. 根据权利要求7所述的裸眼3D显示装置，其特征在于，所述激光点光源包括发射激光的激光器以及设置在所述激光器出光路径上的激光扩束器，所述激光扩束器用于扩展所述激光的直径，以使所述激光照射到所述指向性彩色滤光片的整个面板上。
  9. 根据权利要求8所述的裸眼3D显示装置，其特征在于，所述光源阵列包括发射红光的红激光点光源、发射绿光的绿激光点光源和发射蓝光的蓝激光点光源。
  10. 根据权利要求9所述的裸眼3D显示装置，其特征在于，所述至少三个不同颜色的滤光子单元包括红色滤光子单元、绿色滤光子单元和蓝色滤光子单元，所述红色滤光子单元仅透射红激光，所述绿色滤光子单元仅透射绿激光，所述蓝色滤光子单元仅透射蓝激光；
    所述至少三个结构子单元包括第一结构子单元、第二结构子单元和第三结构子单元；所述至少三个子像素包括红色子像素、绿色子像素和蓝色子像素；
    所述红色子像素与所述第一结构子单元和所述红色滤光子单元对应设置，所述绿色子像素与所述第二结构子单元和所述绿色滤光子单元对应设置，所述蓝色子像素与所述第三结构子单元和所述蓝色滤光子单元对应设置。
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