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Daylight readable liquid crystal display

  • US 5,754,262 A
  • Filed: 07/28/1997
  • Issued: 05/19/1998
  • Est. Priority Date: 04/11/1995
  • Status: Expired due to Term
First Claim
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1. A display that is daylight readable in ambient light, external to the display exceeding about 5,000 foot candles of incident illumination, including:

  • (a) a backlight source for providing initial transmitted light;

    (b) a display element adjacent the backlight source for modulating the initial transmitted light to display images; and

    (c) a front filter adjacent the display element and having the characteristics of;

    (1) absorbing at least about 30% of incident ambient light;

    (2) reflecting less than about 2% of incident ambient light;

    (3) transmitting the modulated initial transmitted light as output light;

    wherein the combination of backlight source, display element, and filter provide a ratio of output light to reflected incident ambient light of at least about 5;

    1.

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