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Transmissive screen and rear projector

  • US 7,012,744 B2
  • Filed: 09/05/2003
  • Issued: 03/14/2006
  • Est. Priority Date: 09/24/2002
  • Status: Expired due to Fees
First Claim
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1. A transmissive screen applied to a rear projector, the transmissive screen comprising:

  • a light-guide plate having substantially cylindrical light-guide spaces arranged in a flat substrate;

    a light-exit-angle distribution uniformizing device to make the angular distribution of the light exiting correspondingly from the substantially cylindrical light-guide spaces of the light-guide plate uniform over the transmissive screen, the light-exit-angle distribution uniformizing device being disposed at the light-exiting face side of the light-guide plate, andwherein the light-exit-angle distribution uniformizing device includes a microlens array having microlenses, each microlens being provided correspondingly to each of the substantially cylindrical light-guide spaces of the light-guide plate, and wherein a material composing the microlenses in a substantially central region of the transmissive screen has a greater refractive index than at least a second material composing the microlenses in a peripheral region of the transmissive screen.

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