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Selectively-transparent electrochromic display

  • US 10,429,713 B2
  • Filed: 06/12/2015
  • Issued: 10/01/2019
  • Est. Priority Date: 06/12/2014
  • Status: Active Grant
First Claim
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1. An electro-optic (EO) display, comprising:

  • one or more adjustable-intensity electrochromic color filters that each include a first electrochromic medium situated between opposed first and second transparent substrates;

    a transparent backlight;

    a transflective layer, comprising an optical film and in optical communication with the transparent backlight, the transflective layer disposed on a first surface of the second transparent substrate and positioned within the one or more adjustable-intensity electrochromic color filters such that the transflective layer is located between the electrochromic mediums of the one or more adjustable-intensity electrochromic color filters and the transparent backlight, wherein the transflective layer reflects light off of one surface of the transflective layer and allows light through another surface of the transflective layer; and

    an electrochromic shutter separated from the one or more adjustable-intensity electrochromic color filters by the transparent backlight;

    wherein the electrochromic shutter is configured to provide a variable range of light transmission;

    wherein the electrochromic shutter has a second electrochromic medium disposed between a third transparent substrate and a fourth transparent substrate;

    wherein the EO display is configured to selectively operate in a first mode in which light is produced by the transparent backlight and passes through the transflective layer, thereby illuminating the electrochromic color filters;

    wherein the EO display is configured to selectively operate in a second mode in which the transflective layer reflects ambient light to illuminate the electrochromic color filters; and

    wherein the EO display is configured to selectively operate in a third mode in which one or more of the adjustable-intensity electrochromic color filters and the electrochromic shutter are in a transparent state and the EO display is configured to allow light to pass through the EO display.

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