WO2017206265A1 - 用于裸眼立体显示设备的狭缝光栅及裸眼立体显示设备 - Google Patents

用于裸眼立体显示设备的狭缝光栅及裸眼立体显示设备 Download PDF

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Publication number
WO2017206265A1
WO2017206265A1 PCT/CN2016/088503 CN2016088503W WO2017206265A1 WO 2017206265 A1 WO2017206265 A1 WO 2017206265A1 CN 2016088503 W CN2016088503 W CN 2016088503W WO 2017206265 A1 WO2017206265 A1 WO 2017206265A1
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Prior art keywords
light
display device
slit grating
stereoscopic display
eye stereoscopic
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PCT/CN2016/088503
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English (en)
French (fr)
Inventor
查国伟
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武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US15/115,612 priority Critical patent/US10295832B2/en
Publication of WO2017206265A1 publication Critical patent/WO2017206265A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • 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
    • 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
    • G02B30/30—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 parallax barriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • H04N13/356—Image reproducers having separate monoscopic and stereoscopic modes
    • H04N13/359—Switching between monoscopic and stereoscopic modes
    • 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
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers

Definitions

  • the present invention relates to the field of naked eye stereoscopic display technology, and in particular to a slit grating and a naked eye stereoscopic display device for a naked eye stereoscopic display device.
  • 3D display technology has become an inevitable development trend of future display technology because it can reproduce the cognitive modes familiar to human beings in nature. Among them, naked-eye 3D technology is popular because it has got rid of complicated auxiliary equipment.
  • grating technology can effectively block image crosstalk between different viewpoints, and has better stereoscopic display effect, but at the same time, the shading part of the grating is almost obscured. About half of the light is transmitted, so that the brightness of the 3D mode is lost by about half. For the 2D/3D switchable display, the brightness of the 2D image is also significantly reduced, so it is necessary to solve the problem by using corresponding techniques.
  • FIG. 1 is a schematic structural diagram of a conventional rear-mounted grating type naked-eye stereoscopic display, which comprises a backlight module 1 , a brightness enhancement film 2 , a grating layer 3 , a lower polarizing plate 4 , a liquid crystal panel 5 , and a plurality of sequentially stacked backlights.
  • the upper polarizer 6 includes an LED 11 , a light guide plate 12 and a diffusion sheet 13 .
  • the LED 11 is disposed on a side of the light guide plate 12
  • the diffusion sheet 13 is disposed above the light guide plate 12 .
  • FIG. 2 is a schematic plan view of a prior art grating layer.
  • the grating layer 3 includes spaced-apart light-shielding strips 31.
  • the light-shielding strips 31 are light-shielding areas, and the light-shielding strips 31 are between the two light-shielding strips 31.
  • a technical solution adopted by the present invention is to provide a slit grating for a naked-eye stereoscopic display device, the slit grating comprising a substrate and a plurality of light shielding strips spaced apart from the substrate, The light shielding strip is for shielding incident light, the slit grating further comprising a wire grid of the light transmitting region between the light shielding strips, the wire grid is for transmitting the first polarization component of the incident light and reflecting a second polarization component of the incident ray perpendicular to the first polarization component; the visor further reflecting the incident ray; the wire grid comprising a plurality of metal lines spaced apart from the light transmissive region.
  • a slit grating for a naked-eye stereoscopic display device, the slit grating comprising a substrate and a plurality of light shielding strips spaced apart from the substrate, The light shielding strip is configured to block incident light, the slit grating further comprising a wire grid located in the light transmissive area between the light shielding strips, the wire grid is configured to transmit the first polarization component of the incident light and reflect a second polarization component of the incident ray that is perpendicular to the first polarization component.
  • the light shielding strip further reflects the incident light.
  • the wire grid includes a plurality of metal wires spaced apart from the light transmitting region.
  • the metal wire is disposed in parallel or obliquely with the light shielding strip.
  • the wire grid further comprises a dielectric layer interposed between the plurality of metal lines and the substrate.
  • the dielectric layer is further disposed between the light shielding strip and the substrate.
  • the material of the metal wire is at least one or a combination of Al, Ag and Au
  • the material of the dielectric layer is one or a combination of SiO2, SiO, MgO, Si3N4, TiO2 and Ta2O5.
  • the arrangement period of the light shielding strip is 30-300 ⁇ m, and the arrangement period of the metal lines is 20-500 nm.
  • the light shielding strip is a metal strip, and is formed by the same layer metal as the metal line by a patterning process.
  • another technical solution adopted by the present invention is to provide a naked-eye stereoscopic display device, where the naked-eye stereoscopic display device includes a backlight module, a liquid crystal panel, and a slit grating, and the slit grating is disposed on the Between the backlight module and the liquid crystal panel;
  • the slit grating includes a substrate and a plurality of light shielding strips spaced apart from the substrate, the light shielding strips are for shielding incident light, and the slit grating further includes a light transmissive area between the light shielding strips. a wire grid for transmitting a first polarization component of the incident ray and reflecting a second polarization component of the incident ray that is perpendicular to the first polarization component.
  • the light shielding strip further reflects the incident light.
  • the wire grid includes a plurality of metal wires spaced apart from the light transmitting region.
  • the metal wire is disposed in parallel or obliquely with the light shielding strip.
  • the wire grid further comprises a dielectric layer interposed between the plurality of metal lines and the substrate.
  • the dielectric layer is further disposed between the light shielding strip and the substrate.
  • the material of the metal wire is at least one or a combination of Al, Ag and Au
  • the material of the dielectric layer is one or a combination of SiO2, SiO, MgO, Si3N4, TiO2 and Ta2O5.
  • the arrangement period of the light shielding strip is 30-300 ⁇ m, and the arrangement period of the metal lines is 20-500 nm.
  • the light shielding strip is a metal strip, and is formed by the same layer metal as the metal line by a patterning process.
  • the present invention provides a wire grid in the light-transmitting region of the grating, the wire grid is capable of transmitting the first polarization component of the incident light and reflecting the incident light and the first polarization a second polarization component perpendicular to the component, and thus the wire grid has a light field recovery function, and the slit grating can significantly increase the brightness of the display when applied to a naked-eye stereoscopic display device, and saves brightness in a conventional naked-eye stereoscopic display device
  • the film and the lower polarizer structure have the advantages of reducing cost and thinning thickness.
  • FIG. 1 is a schematic structural view of a conventional rear-mounted grating type naked-eye stereoscopic display
  • FIG. 2 is a schematic plan view showing a planar structure of a grating layer of the prior art
  • FIG. 3 is a schematic structural view of an embodiment of a slit grating for a naked eye stereoscopic display device according to the present invention.
  • FIG. 4 is a schematic structural view of another embodiment of a slit grating for a naked eye stereoscopic display device according to the present invention.
  • FIG. 5 is a schematic cross-sectional structural view of a slit grating for a naked eye stereoscopic display device of the present invention
  • FIG. 6 is a schematic cross-sectional structural view of a slit grating for a naked eye stereoscopic display device of the present invention.
  • FIG. 7 is a schematic structural diagram of an embodiment of a naked eye stereoscopic display device of the present invention.
  • FIG. 3 is a schematic structural diagram of an embodiment of a slit grating for a naked-eye stereoscopic display device according to the present invention.
  • the present invention provides a slit grating for a naked-eye stereoscopic display device, the slit grating comprising a substrate (not shown) and a plurality of light shielding strips 41 spaced apart from the substrate, the light shielding strips 41 for shielding incident light.
  • the area of the light-shielding strip 41 is a light-shielding area, and the area between the light-shielding strips 41 is a light-transmitting area 42, and the light-shielding area and the light-transmitting area 42 are periodically distributed.
  • the slit grating further includes a wire grid of light transmissive regions 42 between the light-shielding strips 41 for transmitting a first polarization component of the incident light and reflecting a second polarization component of the incident light rays that is perpendicular to the first polarization component.
  • the light shielding strip 41 blocks part of the incident light and enters another part of the incident light of the light transmitting region 42.
  • the first polarized component passes through the wire grid 43 of the light transmitting region, and the second polarization component is The wire grid 43 reflects so that the partially polarized light can be recovered to increase the brightness of the display.
  • the present invention provides a wire grid 43 in the light transmissive region 42 of the grating, the wire grid 43 being capable of transmitting a first polarization component of the incident light and reflecting a second polarization of the incident light perpendicular to the first polarization component.
  • Component, and thus the wire grid 43 has a light field recovery function, which can significantly increase the brightness of the display when applied to a naked-eye stereoscopic display device, and saves the brightness enhancement film and the lower polarizer in the conventional naked-eye stereoscopic display device.
  • the structure has the advantages of reducing cost and thinning thickness.
  • the light shielding strip 41 of the present embodiment further reflects the incident light, and the reflected incident light can be reused after passing through the reflective sheet of the backlight, thereby significantly increasing the brightness of the raster naked-eye stereoscopic display.
  • the wire grid 43 includes a plurality of metal wires 430 spaced apart from each other in the light-transmitting region, and the metal material forming the metal wires 430 is a material having a large refractive index imaginary portion, such as at least one or a combination of Al, Ag, and Au.
  • the reflectance of the second polarization component of the incident light is increased, and the second polarization component of the incident light can be significantly reflected.
  • the first polarization component in this embodiment is TM polarized light perpendicular to the wire grid
  • the second polarization component is TE polarized light parallel to the light bar.
  • the light-shielding strip 41 may be formed by using a metal.
  • the light-shielding strip 41 is formed of a metal material having a large refractive index imaginary part, for example, consistent with the metal line.
  • One or a combination of Al, Ag, and Au are examples of Al, Ag, and Au.
  • the light-shielding strip 41 and the metal line 430 may be a single-layer structure, and the light-shielding strip 41 may be formed from the same layer of metal as the metal line 430 by a patterning process during the fabrication process, thereby simplifying the process.
  • the light shielding strip 41 and the metal wire 430 may be a composite structure in which a single layer structure is combined.
  • the arrangement period of the light-shielding strips 41 is 30-300 ⁇ m, for example, 100 ⁇ m, 150 ⁇ m, 200 ⁇ m, or 270 ⁇ m.
  • the period of the metal line 430 is less than 1 ⁇ m.
  • the arrangement period of the metal lines in the embodiment is 20-500.
  • the duty ratio is 0.1-0.9, so that the light-shielding strip 41 and the metal line 430 do not collide.
  • the metal wires 430 are arranged in parallel with the light-shielding strips 41 of the grating.
  • the metal wires 430 may also be arranged obliquely to the light-shielding strips 41 of the grating, as shown in FIG.
  • a schematic structural view of another embodiment of a slit grating for a naked eye stereoscopic display device is invented. Since the alignment direction of the metal lines 430 determines the transmission and reflection of the polarization state, the alignment direction of the metal lines 430 needs to be determined according to the specific polarization requirements.
  • the wire grid 43 includes a dielectric layer 431 interposed between the plurality of metal lines 430 and the substrate 45, as shown in FIG. 5, which is a line of the slit grating of the present invention for a naked-eye stereoscopic display device.
  • FIG. 5 Schematic diagram of the cross-sectional structure of the grid.
  • the material of the dielectric layer 431 is one or a combination of SiO 2 , SiO, MgO, Si 3 N 4 , TiO 2 , and Ta 2 O 5 .
  • the dielectric layer 431 can also be disposed between the light shielding strip 41 and the substrate 45, as shown in FIG. 6, which is a slit of the present invention for a naked eye stereoscopic display device. Schematic diagram of the cross-sectional structure of the grating.
  • FIG. 7 is a schematic structural diagram of an embodiment of a naked eye stereoscopic display device of the present invention.
  • the naked eye stereoscopic display device includes a backlight module 50, a liquid crystal panel 60, and a slit grating 40.
  • the slit grating 40 is the slit grating 40 of any one of the above embodiments, and the slit grating 40 is disposed on the backlight module 50 and the liquid crystal panel 60. between.
  • the backlight module 50 includes an LED light source 501, a light guide plate 502, and a diffusion sheet 503.
  • the LED light source 501 is disposed on a side of the light guide plate 502, and the diffusion sheet 503 is disposed above the light guide plate 502. .
  • a polarizer 70 is further disposed above the liquid crystal panel 60.
  • the naked-eye stereoscopic display device adopts the slit grating 40 in the above embodiment of the present invention, and the light-shielding strip of the slit grating 40 and the wire of the wire grid in the light-transmitting region can reflect incident light, and have a light field recovery function. Therefore, the brightness of the display can be significantly improved, the brightness enhancement film and the lower polarizer structure in the conventional display can be saved, the cost can be reduced and the thickness of the product can be reduced.
  • the present invention can significantly increase the brightness of the display while reducing the cost and thinning the thickness of the product.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Polarising Elements (AREA)

Abstract

一种用于裸眼立体显示设备的狭缝光栅(40)及裸眼立体显示设备。该狭缝光栅(40)包括基板(45)以及间隔设置于基板(45)上的多个遮光条(41)，遮光条(41)用于遮挡入射光线，狭缝光栅(40)进一步包括位于遮光条(41)之间的透光区域(42)的线栅(43)，用于透射入射光线的第一偏振分量且反射与第一偏振分量垂直的第二偏振分量。该裸眼立体显示设备包括背光模组(50)、液晶面板(60)及上述狭缝光栅(40)。该狭缝光栅(40)能够显著提高显示器的亮度，同时降低了成本并减薄了产品的厚度。

Description

用于裸眼立体显示设备的狭缝光栅及裸眼立体显示设备
【技术领域】
本发明涉及裸眼立体显示技术领域，特别是涉及一种用于裸眼立体显示设备的狭缝光栅及裸眼立体显示设备。
【背景技术】
3D显示技术由于能够再现自然界中人类所熟悉的认知方式已经成为未来显示技术的必然发展趋势，其中裸眼3D技术由于摆脱了复杂的辅助设备而大受欢迎。
实现裸眼3D显示的方式多种多样，包括光栅、透镜技术等，其中光栅技术由于能够有效阻绝不同视点之间的图像串扰，具有较优的立体显示效果，但同时由于光栅的遮光部分几乎遮住了一半左右的光线透过,使得3D模式的亮度损失了一半左右，对于2D/3D可切换的显示器使得2D图像的亮度也明显下降，因而有必要采用相应的技术予以解决。
如图1所示，图1是传统的后置式光栅式裸眼立体显示器的结构示意图，包括依次叠设的背光模组1、增亮膜2、光栅层3、下偏振片4、液晶面板5和上偏光片6，其中，背光模组1包括LED11、导光板12和扩散片13，LED11设置在导光板12的侧边上，扩散片13设置在导光板12的上方。如图2所示，图2是现有技术的光栅层的平面结构示意图。光栅层3包括间隔设置的遮光条31，遮光条31处为遮光区域，两个遮光条31之间为透光区域32。背光模组1经过增亮膜2后部分偏振光得到重复利用，亮度显著增加，但是在经过光栅层3后遮光部分仍然会导致亮度损失。
【发明内容】
本发明的目的在于提供一种用于裸眼立体显示设备的狭缝光栅及裸眼立体显示设备，能够解决现有技术存在的光栅的遮光部分导致亮度损失的问题。
为实现上述目的，本发明采用的一个技术方案是：提供一种用于裸眼立体显示设备的狭缝光栅，所述狭缝光栅包括基板以及间隔设置于所述基板上的多个遮光条，所述遮光条用于遮挡入射光线，所述狭缝光栅进一步包括位于所述遮光条之间的透光区域的线栅，所述线栅用于透射所述入射光线的第一偏振分量且反射所述入射光线的与所述第一偏振分量垂直的第二偏振分量；所述遮光条进一步反射所述入射光线；所述线栅包括间隔设置于所述透光区域内的多条金属线。
为实现上述目的，本发明采用的另一个技术方案是：提供一种用于裸眼立体显示设备的狭缝光栅，所述狭缝光栅包括基板以及间隔设置于所述基板上的多个遮光条，所述遮光条用于遮挡入射光线，所述狭缝光栅进一步包括位于所述遮光条之间的透光区域的线栅，所述线栅用于透射所述入射光线的第一偏振分量且反射所述入射光线的与所述第一偏振分量垂直的第二偏振分量。
其中，所述遮光条进一步反射所述入射光线。
其中，所述线栅包括间隔设置于所述透光区域内的多条金属线。
其中，所述金属线与所述遮光条平行或倾斜设置。
其中，所述线栅进一步包括介于所述多条金属线与所述基板之间的介质层。
其中，所述介质层进一步设置于所述遮光条与所述基板之间。
其中，所述金属线的材料为Al、Ag和Au中的至少一种或组合，所述介质层的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一种或组合。
其中，所述遮光条的排列周期为30-300μm，所述金属线的排列周期为20-500 nm。
其中，所述遮光条为金属条，且与所述金属线由同一层金属通过图案化工艺形成。
为实现上述目的，本发明采用的又一个技术方案是：提供一种裸眼立体显示设备，所述裸眼立体显示设备包括背光模组、液晶面板以及狭缝光栅，所述狭缝光栅设置于所述背光模组与所述液晶面板之间；
所述狭缝光栅包括基板以及间隔设置于所述基板上的多个遮光条，所述遮光条用于遮挡入射光线，所述狭缝光栅进一步包括位于所述遮光条之间的透光区域的线栅，所述线栅用于透射所述入射光线的第一偏振分量且反射所述入射光线的与所述第一偏振分量垂直的第二偏振分量。
其中，所述遮光条进一步反射所述入射光线。
其中，所述线栅包括间隔设置于所述透光区域内的多条金属线。
其中，所述金属线与所述遮光条平行或倾斜设置。
其中，所述线栅进一步包括介于所述多条金属线与所述基板之间的介质层。
其中，所述介质层进一步设置于所述遮光条与所述基板之间。
其中，所述金属线的材料为Al、Ag和Au中的至少一种或组合，所述介质层的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一种或组合。
其中，所述遮光条的排列周期为30-300μm，所述金属线的排列周期为20-500 nm。
其中，所述遮光条为金属条，且与所述金属线由同一层金属通过图案化工艺形成。
本发明的有益效果是：区别于现有技术的情况，本发明通过在光栅的透光区域中设置线栅，该线栅能透射入射光线的第一偏振分量并反射入射光线的与第一偏振分量垂直的第二偏振分量，因而该线栅具有光场回收功能，该狭缝光栅应用于裸眼立体显示设备中时，能够显著提高显示器的亮度，并且节省了传统裸眼立体显示设备中的增亮膜与下偏光片结构，兼具降低成本与减薄厚度的优势。
【附图说明】
图1是传统的后置式光栅式裸眼立体显示器的结构示意图；
图2是现有技术的光栅层的平面结构示意图；
图3是本发明用于裸眼立体显示设备的狭缝光栅实施例的结构示意图；
图4是本发明用于裸眼立体显示设备的狭缝光栅另一实施例的结构示意图；
图5是本发明用于裸眼立体显示设备的狭缝光栅的截面结构示意图；
图6是本发明用于裸眼立体显示设备的狭缝光栅的截面结构示意图；
图7是本发明裸眼立体显示设备实施例的结构示意图。
【具体实施方式】
为使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明做进一步详细描述。
参阅图3，图3是本发明用于裸眼立体显示设备的狭缝光栅实施例的结构示意图。
本发明提供了一种用于裸眼立体显示设备的狭缝光栅，该狭缝光栅包括基板（图未示）以及间隔设置于基板上的多个遮光条41，遮光条41用于遮挡入射光线，遮光条41的区域为遮光区域，遮光条41之间的区域则为透光区域42，遮光区域与透光区域42周期分布。狭缝光栅进一步包括位于遮光条41之间的透光区域42的线栅，线栅43用于透射入射光线的第一偏振分量且反射入射光线的与第一偏振分量垂直的第二偏振分量。
入射光经过该狭缝光栅时，遮光条41遮挡了部分入射光，而进入透光区域42的另一部分入射光中，第一偏振分量透过透光区域的线栅43，第二偏振分量被线栅43反射，从而能对该部分偏振光进行回收，以提高显示器的亮度。
区别于现有技术，本发明通过在光栅的透光区域42中设置线栅43，该线栅43能透射入射光线的第一偏振分量并反射入射光线的与第一偏振分量垂直的第二偏振分量，因而该线栅43具有光场回收功能，该狭缝光栅应用于裸眼立体显示设备中时，能够显著提高显示器的亮度，并且节省了传统裸眼立体显示设备中的增亮膜与下偏光片结构，兼具降低成本与减薄厚度的优势。
具体地，本实施例的遮光条41进一步反射入射光线，被反射的入射光线经过背光的反射片后能够重新得到利用，从而能显著增加光栅式裸眼立体显示器的亮度。
线栅43包括间隔设置于透光区域内的多条金属线430，形成金属线430的金属材料为具有较大折射率虚部的材料，例如Al、Ag和Au中的至少一种或组合等，从而提高了对入射光线的第二偏振分量的反射率，能显著地反射入射光线的第二偏振分量。举例而言，本实施例中的第一偏振分量为垂直于线栅的TM偏振光，第二偏振分量为平行于遮光条的TE偏振光。
为进一步提高遮光条41对入射光线的反射率，可以采用金属形成遮光条41，在一个实施例中，该遮光条41由具有较大折射率虚部的金属材料形成，例如，与金属线一致的Al、Ag和Au中的一种或者组合等。遮光条41和金属线430可以是单层结构，在制作过程中，遮光条41可以与金属线430由同一层金属通过图案化工艺形成，从而简化了制程。当然，遮光条41与金属线430可以是分别为单层结构组合成的复合结构。
遮光条41的排列周期为30-300μm，例如100μm、150μm、200μm或者270μm等。金属线430的周期小于1μm，例如，本实施例中金属线的排列周期为20-500 nm，占空比为0.1-0.9，因而遮光条41和金属线430两者不冲突。
图3所示的狭缝光栅中，金属线430平行于光栅的遮光条41排列，当然，该金属线430也可以倾斜于光栅的遮光条41进行排列，如图4所示，图4是本发明用于裸眼立体显示设备的狭缝光栅另一实施例的结构示意图。由于金属线430的排列方向决定了偏振态的透过与反射，因而，金属线430的排列方向需要依据具体的偏振需求来决定。
在一个实施例中，线栅43包括介于多条金属线430与基板45之间的介质层431，如图5所示，图5是本发明用于裸眼立体显示设备的狭缝光栅的线栅的截面结构示意图。其中，介质层431的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一种或组合。
值得一提的是，在另一个实施例中，该介质层431还可以设置于遮光条41与基板45之间，如图6所示，图6是本发明用于裸眼立体显示设备的狭缝光栅的截面结构示意图。
本发明还提供了一种裸眼立体显示设备，如图7所示，图7是本发明裸眼立体显示设备实施例的结构示意图。裸眼立体显示设备包括背光模组50、液晶面板60以及狭缝光栅40，狭缝光栅40为上述任意一实施例的狭缝光栅40，该狭缝光栅40设置于背光模组50与液晶面板60之间。
具体地，背光模组50包括LED光源501、导光板502和扩散片503，例如图7所示的，LED光源501设置在导光板502的侧边上，扩散片503设置在导光板502的上方。液晶面板60上方还设有偏光片70。该裸眼立体显示设备由于采用了本发明上述实施例中的狭缝光栅40，该狭缝光栅40的遮光条和透光区域中的线栅的金属线均能反射入射光线，具有光场回收功能，所以能显著提高显示器的亮度，节省了传统的显示器中的增亮膜和下偏光片结构，降低了成本同时可以减少产品的厚度。
综上所述，本发明能够显著提高显示器的亮度，同时降低了成本并减薄了产品的厚度。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内

Claims (19)

  1. 一种用于裸眼立体显示设备的狭缝光栅，其中，所述狭缝光栅包括基板以及间隔设置于所述基板上的多个遮光条，所述遮光条用于遮挡入射光线，所述狭缝光栅进一步包括位于所述遮光条之间的透光区域的线栅，所述线栅用于透射所述入射光线的第一偏振分量且反射所述入射光线的与所述第一偏振分量垂直的第二偏振分量；所述遮光条进一步反射所述入射光线；所述线栅包括间隔设置于所述透光区域内的多条金属线。
  2. 一种用于裸眼立体显示设备的狭缝光栅，其中，所述狭缝光栅包括基板以及间隔设置于所述基板上的多个遮光条，所述遮光条用于遮挡入射光线，所述狭缝光栅进一步包括位于所述遮光条之间的透光区域的线栅，所述线栅用于透射所述入射光线的第一偏振分量且反射所述入射光线的与所述第一偏振分量垂直的第二偏振分量。
  3. 根据权利要求2所述的狭缝光栅，其中，所述遮光条进一步反射所述入射光线。
  4. 根据权利要求2所述的狭缝光栅，其中，所述线栅包括间隔设置于所述透光区域内的多条金属线。
  5. 根据权利要求4所述的狭缝光栅，其中，所述金属线与所述遮光条平行或倾斜设置。
  6. 根据权利要求4所述的狭缝光栅，其中，所述线栅进一步包括介于所述多条金属线与所述基板之间的介质层。
  7. 根据权利要求6所述的狭缝光栅，其中，所述介质层进一步设置于所述遮光条与所述基板之间。
  8. 根据权利要求6所述的狭缝光栅，其中，所述金属线的材料为Al、Ag和Au中的至少一种或组合，所述介质层的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一种或组合。
  9. 根据权利要求4所述的狭缝光栅，其中，所述遮光条的排列周期为30-300μm，所述金属线的排列周期为20-500 nm。
  10. 根据权利要求4所述的狭缝光栅，其中，所述遮光条为金属条，且与所述金属线由同一层金属通过图案化工艺形成。
  11. 一种裸眼立体显示设备，其中，所述裸眼立体显示设备包括背光模组、液晶面板以及狭缝光栅，所述狭缝光栅设置于所述背光模组与所述液晶面板之间；
    所述狭缝光栅包括基板以及间隔设置于所述基板上的多个遮光条，所述遮光条用于遮挡入射光线，所述狭缝光栅进一步包括位于所述遮光条之间的透光区域的线栅，所述线栅用于透射所述入射光线的第一偏振分量且反射所述入射光线的与所述第一偏振分量垂直的第二偏振分量。
  12. 根据权利要求11所述的裸眼立体显示设备，其中，所述遮光条进一步反射所述入射光线。
  13. 根据权利要求11所述的裸眼立体显示设备，其中，所述线栅包括间隔设置于所述透光区域内的多条金属线。
  14. 根据权利要求13所述的裸眼立体显示设备，其中，所述金属线与所述遮光条平行或倾斜设置。
  15. 根据权利要求13所述的裸眼立体显示设备，其中，所述线栅进一步包括介于所述多条金属线与所述基板之间的介质层。
  16. 根据权利要求15所述的裸眼立体显示设备，其中，所述介质层进一步设置于所述遮光条与所述基板之间。
  17. 根据权利要求15所述的裸眼立体显示设备，其中，所述金属线的材料为Al、Ag和Au中的至少一种或组合，所述介质层的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一种或组合。
  18. 根据权利要求13所述的裸眼立体显示设备，其中，所述遮光条的排列周期为30-300μm，所述金属线的排列周期为20-500 nm。
  19. 根据权利要求13所述的裸眼立体显示设备，其中，所述遮光条为金属条，且与所述金属线由同一层金属通过图案化工艺形成。
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