Display device and portable terminal apparatus

  • US 7,197,338 B2
  • Filed: 06/18/2003
  • Issued: 03/27/2007
  • Est. Priority Date: 06/20/2002
  • Status: Expired due to Fees
First Claim
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1. A portable terminal apparatus comprising:

  • transmission/reception means for transmitting/receiving a signal;

    operation means for performing input;

    first display means for displaying information;

    second display means, arranged to make a rear surface oppose that of said first display means, for displaying information different from that of said first display means;

    one illumination means for illuminating said first display means and second display means;

    a housing which can change to obtain a form in which said first display means is covered while said second display means is exposed and a form in which both said first display means and second display means are exposed, said first display means and second display means are illuminated with transmission light from said illumination means;

    detection means for detecting whether said first display means is covered; and

    illumination control means for controlling a power supply amount to said illumination means on the basis of a signal from said detection means,wherein said illumination means comprisesa plurality of lighting means arranged at positions outside the through hole of said illumination means, andlight guide means for guiding light from said plurality of lighting means to entire surfaces of said first display means and second display means, andwherein said illumination control means controls to supply power to only substantially half of said plurality of lighting means in ascending order of distance from the display surface of said second display means on the basis of a signal from said detection means.

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