利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.011 秒)

    Backlighting system for displays
    2.
    发明授权
    Backlighting system for displays 失效
    显示器背光系统

    公开(公告)号：US06733147B2

    公开(公告)日：2004-05-11

    申请号：US10206459

    申请日：2002-07-27

    申请人： San Zhuang Wang ,  Gajendra Savant ,  Jeffrey A. Laine ,  Mark Bennahmias ,  Rick L. Shie

    发明人： San Zhuang Wang ,  Gajendra Savant ,  Jeffrey A. Laine ,  Mark Bennahmias ,  Rick L. Shie

    IPC分类号： G01D1128

    CPC分类号： G02B6/0016 ,  B29C33/3892 ,  B29C39/028 ,  B29C41/085 ,  B29C41/12 ,  B29D11/00 ,  B29K2021/00 ,  B29L2023/00 ,  B29L2031/757 ,  G02B5/0215 ,  G02B5/0252 ,  G02B5/0278 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0051 ,  G02B6/0061 ,  G02B6/0065 ,  G02F1/133615

    摘要： An LED-based backlighting system that provides excellent brightness and homogeneity suitable for high performance multi-color and high resolution portable displays such as for PDAs and cell phones. Several different but similar embodiments are disclosed. Some are suitable for use with multiple LEDs and some for use with a single LED. In a first such embodiment, multiple LEDs are located adjacent the input edge of a light pipe. The input edge contains fixed pitch grooves to propagate the LED light in a direction that is substantially angled toward the bottom surface of the light pipe along its entire area. The light pipe bottom surface also has grooves for altering the direction of the LED light toward the upper surface of the light pipe where it exits the light pipe toward a viewer. The exterior of the exit surface of the light pipe receives a light shaping diffuser (LSD) and an optical film. The diffuser acts to diffuse and distribute the exiting light at selected horizontal and vertical angles and the optical film shapes. In a second embodiment, a second LSD is positioned above the optical film. In a third embodiment, an LSD strip having a foreshortened LSD is positioned below the light pipe adjacent the input edge to better reduce hot spots near the LEDs.

    摘要翻译： 一种基于LED的背光系统，提供优异的亮度和均匀性，适用于高性能多色和高分辨率便携式显示器，如PDA和手机。 公开了几个不同但类似的实施例。 一些适用于多个LED，一些适用于单个LED。 在第一个这样的实施例中，多个LED位于光管的输入边缘附近。 输入边缘包含固定的间距沟槽，以沿着其整个区域沿着基本上朝向光管的底表面成角度的方向传播LED光。 光管底表面还具有凹槽，用于将LED光的方向改变为朝向观察者离开光管的光管的上表面。 光管的出射表面的外部接收光成形漫射器（LSD）和光学膜。 扩散器用于以所选择的水平和垂直角度以及光学膜形状扩散和分布出射光。 在第二实施例中，第二LSD位于光学膜上方。 在第三实施例中，具有缩短的LSD的LSD条带位于邻近输入边缘的光管下方，以更好地减少LED附近的热点。