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    • 5. 发明授权
    • Display system
    • 显示系统
    • US09535253B2
    • 2017-01-03
    • US14617574
    • 2015-02-09
    • Microsoft Technology Licensing, LLC
    • Tapani LevolaPasi Saarikko
    • G02F1/07G02B27/01G02B5/18G02F1/01
    • G02B27/0172G02B5/1842G02B5/3083G02B6/34G02B27/0081G02B27/4261G02B27/4272G02B2027/011G02B2027/0125G02B2027/013G02B2027/0132G02B2027/0174G02F1/011G02F1/0136
    • A display system comprises an optical waveguide and a light engine. The light engine generates multiple input beams which form a virtual image. An incoupling grating of the waveguide couples each beam into an intermediate grating of the waveguide, in which that beam is guided onto multiple splitting regions. The intermediate grating, formed by modulations on a first surface of the waveguide, splits that beam at the splitting regions to provide multiple substantially parallel versions of that beam. Those multiple versions are coupled into an exit grating of the waveguide, in which the multiple versions are guided onto multiple exit regions. The exit grating diffracts the multiple versions of that beam outwardly. The multiple input beams thus cause multiple exit beams to exit the waveguide which form a version of the virtual image. A polarization state of each beam interacting with the modulations is controlled by a retarder film.
    • 显示系统包括光波导和光引擎。 光引擎产生形成虚像的多个输入光束。 波导的耦合光栅将每个光束耦合到波导的中间光栅中,其中该光束被引导到多个分割区域上。 通过在波导的第一表面上的调制形成的中间光栅将该光束在分离区域处分裂,以提供该光束的多个基本平行的形式。 这些多个版本耦合到波导的出口光栅中,其中多个版本被引导到多个出口区域。 出射光栅向外衍射该光束的多个版本。 因此,多个输入光束导致多个出射光束离开形成虚像的版本的波导。 与调制相互作用的每个光束的偏振状态由延迟膜控制。
    • 6. 发明授权
    • Eye tracking apparatus, method and system
    • 眼睛跟踪装置,方法和系统
    • US09459451B2
    • 2016-10-04
    • US14140987
    • 2013-12-26
    • Microsoft Technology Licensing, LLC
    • Pasi SaarikkoXinye LouScott McEldowneySteven RobbinsTapani Levola
    • G02B6/34G03H1/00G09G5/00G02B27/00G02B6/02H04N13/04G06F3/01A61B3/113G02B27/01
    • G02B27/0093A61B3/113G02B6/02085G02B6/34G02B27/0172G02B2027/0107G02B2027/0138G02B2027/0178G06F3/013H04N13/383
    • A transparent waveguide for use in eye tracking includes an input-coupler and an output-coupler. The input-coupler comprises a plurality of curved grating lines having a radially varying pitch. When positioned in front of an eye illuminated with infrared light, infrared light beams reflected from the eye and incident on the input-coupler enter the waveguide at the input-coupler, propagate through the waveguide by way of total internal reflections, and exit the waveguide proximate the output-coupler. The radially varying pitch of the curved grating lines of the input-coupler provides angular encoding of infrared light incident on the input-coupler, and more specifically, causes different beams of infrared light incident on respective different horizontal and vertical positions of the input-coupler to propagate through the waveguide at respective different angles of reflection and exit the waveguide at respective different angles of incidence relative to a surface of the waveguide through which infrared light beams exit.
    • 用于眼睛跟踪的透明波导包括输入耦合器和输出耦合器。 输入耦合器包括具有径向变化间距的多个弯曲光栅线。 当放置在用红外线照射的眼睛前方时,从眼睛反射并入射到输入耦合器上的红外光束进入输入耦合器处的波导,通过全内反射传播通过波导,并离开波导 靠近输出耦合器。 输入耦合器的弯曲光栅线的径向变化的间距对入射到输入耦合器上的红外光的角度编码提供了角度编码,更具体地说,使不同的红外光束入射在输入耦合器的不同的水平和垂直位置上 以相应的不同的反射角传播通过波导并以相应的入射角相对于波导的表面离开波导,红外光束通过该表面离开。