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Display stack-up for a mobile electronic device having internal and external displays

  • US 7,768,605 B2
  • Filed: 06/30/2006
  • Issued: 08/03/2010
  • Est. Priority Date: 06/30/2006
  • Status: Active Grant
First Claim
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1. A display stack-up comprising:

  • an internal display device;

    a backlight unit being capable of providing illumination to the internal display device; and

    an external display device having bi-stable optical states, said states including a transmissive optical state and a reflective optical state, wherein the external display device is placed between the backlight unit and the internal display device.

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