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Head-up display with narrow band reflective polarizer

  • US 20050270655A1
  • Filed: 07/29/2005
  • Published: 12/08/2005
  • Est. Priority Date: 12/31/2002
  • Status: Active Grant
First Claim
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1. A system for displaying information to a viewing position, comprising:

  • a window member having a target area and at least a first exposed window surface at the target area, the first exposed window surface having associated therewith a first normal axis;

    a display source that emits polarized light toward the target area along an illumination axis that makes an acute angle θ

    1 with respect to the first normal axis, the emitted light being substantially p-polarized and including a selected visible wavelength of interest; and

    a reflective polarizer disposed proximate the target area to reflect at least some of the p-polarized light from the display source towards the viewing position;

    wherein the reflective polarizer reflects the p-polarized light in a narrow reflection band that includes the selected visible wavelength of interest over an angular range of incidence angles that includes the angle θ

    1.

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