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Rapid estimation of effective illuminance patterns for projected light fields

  • US 9,269,312 B2
  • Filed: 01/06/2014
  • Issued: 02/23/2016
  • Est. Priority Date: 07/27/2004
  • Status: Active Grant
First Claim
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1. A method for estimating an effective luminance pattern representing a distribution of projected light in a display apparatus, the method comprising:

  • determining driving values for one or more light sources arranged to project light;

    determining an effective luminance pattern for the projected light by;

    for each of the one or more light sources determining a contribution to the effective luminance pattern for each of a plurality of components of a point spread function for the light source; and

    ,combining the contributions of the components the effective luminance pattern to yield an estimated effective luminance pattern;

    wherein one of the plurality of components consists essentially of a higher-order part of a set of point spread function values and a second one of the components consists essentially of a lower-order part of the set of point spread function values and the set of point spread function values comprises 16-bit words and the higher-order and lower-order parts of the set of point spread function values each comprises 8-bit words.

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