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    • 4. 发明申请
    • DISPLAY DEVICE AND BACKLIGHT
    • 显示设备和背光
    • WO03104863A2
    • 2003-12-18
    • PCT/IB0302160
    • 2003-05-21
    • KONINKL PHILIPS ELECTRONICS NVCORNELISSEN HUGO JDONA MARINUS J JGREINER HORST
    • CORNELISSEN HUGO JDONA MARINUS J JGREINER HORST
    • F21V8/00G02B6/00
    • G02B6/0016G02B6/0033
    • The invention relates to a display device comprising at least two light sources, a display panel and an illumination system provided with a beam expander on which the light sources are positioned at opposite faces for expanding the light from the light sources in a line like shape, which beam expander emits the expanded light via an exit surface, and an illumination light guide having an entrance surface for receiving the expanded light from the beam expander and for distributing the received light for homogeneous illumination of the display panel. In order to improve the light efficiency of the display device the beam expander is provided with first symmetric grooves for coupling out the light with a skimming emission distribution with respect to an exit surface of the beam expander and an entrance surface of the illumination light guide is provided with second symmetric grooves adapted to the skimming emission distribution of the light from the beam expander for directing the light along the normal to the entrance surface. The skimming emission distribution reduces the number of reflections and thereby light losses in the beam expander.
    • 本发明涉及包括至少两个光源的显示装置,显示面板和设置有光束扩展器的照明系统,光源位于相对的面上,用于使来自光源的光以类似形状的方式扩展, 所述光束扩展器经由出射表面发射扩展的光;以及照明光导,其具有用于接收来自扩束器的扩展光的入射表面,并且用于分配所接收的光以均匀照明显示面板。 为了提高显示装置的光效率,光束扩展器设置有第一对称凹槽,用于将相对于光束扩展器的出射表面的撇去发射分布的光耦合出去,并且照明光导的入射面为 设置有适于从光束扩展器去除光的扫描发射分布的第二对称凹槽,用于将光沿着法线引导到入射表面。 撇号发射分布减少了光束扩展器中的反射次数和光损耗。