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    • 8. 发明申请
    • WIDE ANGLE IMAGING DIRECTIONAL BACKLIGHTS
    • 广角成像方向背光
    • WO2017083041A1
    • 2017-05-18
    • PCT/US2016/056410
    • 2016-10-11
    • REALD INC.
    • ROBINSON, Michael G.WOODGATE, Graham J.
    • F21V8/00
    • G02B6/002G02B6/0048G02B6/0068G02B27/2228G02B27/225H04N13/305H04N13/312H04N13/32
    • An imaging directional backlight apparatus includes a waveguide and a light source array for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure. The steps may include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features, providing discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and define the relative positions of system elements and ray paths. The uncorrected system creates non-illuminated void portions when viewed off-axis preventing uniform wide angle 2D illumination modes. The input end may have microstructures arranged to remove this non uniformity at wide angles. The microstructures may have reduced reflectivity for parts of the input end that contribute to stray light in privacy and autostereoscopic modes.
    • 成像定向背光装置包括波导和用于从局部光源提供大面积定向照明的光源阵列。 波导可以包括阶梯结构。 这些步骤可以包括在第一向前方向上传播的被引导光光学隐藏的提取特征。 沿第二向后方向传播的返回光可以被特征折射,衍射或反射,从而提供离开波导顶面的离散照明光束。 通过对各个光源进行成像并且定义系统元件和射线路径的相对位置来形成观察窗。 未经校正的系统在离轴观看时会产生不发光的空隙部分,从而防止均匀的广角2D照明模式。 输入端可以具有微结构,以便在广角处去除这种不均匀性。 微结构可能降低了输入端部分的反射率,这些部分在隐私和自动立体模式下有助于杂散光。
    • 9. 发明申请
    • DIRECTIONAL BACKLIGHT
    • 方向背光
    • WO2015143227A1
    • 2015-09-24
    • PCT/US2015/021583
    • 2015-03-19
    • REALD INC.
    • WOODGATE, Graham J.HARROLD, JonathanROBINSON, Michael G.
    • G02F1/1335
    • G02B27/2214G02B6/0035G02B6/0048G02B6/0068
    • A directional display may include a waveguide. The waveguide may include light extraction features arranged to direct light from an array of light sources by total internal reflection to an array of viewing windows and a reflector arranged to direct light from the waveguide by transmission through extraction features of the waveguide to the same array of viewing windows. A further spatially multiplexed display device comprising a spatial light modulator and parallax element is arranged to cooperate with the illumination from the waveguide. An efficient and bright autostereoscopic display system with low cross talk and high resolution can be achieved.
    • 定向显示器可以包括波导。 波导可以包括光提取特征,其布置成将来自光源阵列的光通过全内反射引导到观察窗阵列,以及反射器,布置成通过将波导的提取特征透射通过波导的提取特征来引导来自波导的光, 查看窗口。 包括空间光调制器和视差元件的另外的空间多路复用的显示设备被布置成与来自波导的照明配合。 可以实现具有低串扰和高分辨率的高效和明亮的自动立体显示系统。