×

Backlight for display device

  • US 20060028842A1
  • Filed: 08/05/2005
  • Published: 02/09/2006
  • Est. Priority Date: 08/05/2004
  • Status: Active Grant
First Claim
Patent Images

1. A backlight for a display device comprising:

  • a board comprising a plurality of light emitting diodes provided thereon; and

    a light guiding plate provided on the light emitting diodes and comprising a plurality of light reflecting grooves, wherein the light reflecting grooves are provided at an upper surface of the light guiding plate, each of the light reflecting grooves having a reverse cone-like shape such that the backlight satisfies the following equation d

    6

    l





    tan





    θ

    2





    tan





    θ

    T
    -5





    tan





    θ

    where l is a distance between a light emitting chip of the light emitting devise and a bottom surface of the light guiding plate, θ

    is the largest angle formed between the main axis of the light reflecting groove and the directly upward proceeding light to be intercepted, θ

    T is an angle formed between a cross-section of the light reflecting groove and the main axis thereof, and d is a thickness of the light guiding plate.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×