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Method and apparatus for employing a light shield to modulate pixel color responsivity

  • US 6,235,549 B1
  • Filed: 03/13/2000
  • Issued: 05/22/2001
  • Est. Priority Date: 09/26/1997
  • Status: Expired due to Term
First Claim
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1. A method comprising the steps of:

  • a) determining a relative responsivity (S1) for a pixel of a first color;

    b) determining a relative responsivity (S2) for a pixel of a second color;

    c) determining whether the relative responsivity (S1) for the first pixel is more than the relative responsivity (S2) of the second pixel;

    if yes, forming a mask opening above the first pixel, said mask opening having an area substantially equal to the light receiving area adjusted by a reduction factor, said reduction factor being a result of an arithmetic operation between the relative responsivity of the first pixel and the relative responsivity of the second pixel; and

    forming a mask opening above the second pixel, said mask opening having an area substantially equal to the light receiving area;

    else, forming a mask opening above the first pixel, said mask opening having an area substantially equal to the light receiving area; and

    forming a mask opening above the second pixel, said mask opening having an area substantially equal to the light receiving area adjusted by a reduction factor, said reduction factor being a result of an arithmetic operation between the relative responsivity for a second pixel and the relative responsivity of the first pixel.

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