Directional display and method of making a mask for a directional display
    7.
    发明授权
    Directional display and method of making a mask for a directional display 失效
    定向显示和制作面向方向显示的方法

    公开(公告)号:US06473141B2

    公开(公告)日:2002-10-29

    申请号:US09874684

    申请日:2001-06-05

    IPC分类号: G02F11335

    摘要: A directional display comprises a display arrangement such as a spatial light modulator and a rear parallax barrier illuminated by a suitable backlight. The spatial light modulator and the parallax barrier cooperate to produce Fresnel diffraction which results in spatially non-uniform brightness across viewing windows of the display. Also, where the spatial light modulator has pixels of non-constant vertical aperture, further variations in the intensity profile at the windows occurs. In order to compensate for this, a mask is provided, for instance between the parallax barrier and the backlight. The mask cooperates with the parallax barrier to produce an intensity pattern having variations which are the inverse of the variations in intensity pattern produced by the parallax barrier and the spatial light modulator. The variations are superimposed and substantially cancel each other out so as to result in viewing windows which have substantially uniform light intensities.

    摘要翻译: 定向显示器包括诸如空间光调制器和由合适的背光照明的后视差屏障的显示装置。 空间光调制器和视差屏障合作产生菲涅耳衍射,其导致在显示器的观察窗口上的空间不均匀的亮度。 此外,在空间光调制器具有不恒定垂直孔径的像素的情况下,窗口处的强度分布的进一步变化。 为了补偿这一点,提供掩模,例如在视差屏障和背光之间。 掩模与视差屏障配合以产生具有与由视差屏障和空间光调制器产生的强度图案的变化相反的变化的强度图案。 这些变化被叠加并且基本相互抵消,从而导致具有基本上均匀的光强度的观察窗。

    Directional display for a directional display having an angular intensity profile compensator

    公开(公告)号:US06271896B1

    公开(公告)日:2001-08-07

    申请号:US08985163

    申请日:1997-12-04

    IPC分类号: G02F11335

    摘要: A directional display comprises a display arrangement such as a spatial light modulator and a rear parallax barrier illuminated by a suitable backlight. The spatial light modulator and the parallax barrier cooperate to produce Fresnel diffraction which results in spatially non-uniform brightness across viewing windows of the display. Also, where the spatial light modulator has pixels of non-constant vertical aperture, further variations in the intensity profile at the windows occurs. In order to compensate for this, a mask is provided, for instance between the parallax barrier and the backlight. The mask cooperates with the parallax barrier to produce an intensity pattern having variations which are the inverse of the variations in intensity pattern produced by the parallax barrier and the spatial light modulator. The variations are superimposed and substantially cancel each other out so as to result in viewing windows which have substantially uniform light intensities.