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Thin direct-lit backlight for LCD display

  • US 7,220,036 B2
  • Filed: 05/20/2005
  • Issued: 05/22/2007
  • Est. Priority Date: 05/20/2005
  • Status: Expired due to Fees
First Claim
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1. A backlight suitable for use in a display, comprising:

  • a diffuser plate;

    a specular back reflector; and

    a plurality of elongated light sources disposed between the diffuser plate and the back reflector, the light sources having a cross-sectional diameter of 2R;

    wherein the light sources are positioned such that a distance T from centers of the light sources to the back reflector is no greaater than 2R;

    and wherein the light sources have source-to-source spacing S, where a distance from the diffusing plate to the center of the light source is D, and wherein S/D is at least 1.5.

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