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Mobile telephone with back light function

  • US 20010027123A1
  • Filed: 02/23/2001
  • Published: 10/04/2001
  • Est. Priority Date: 02/25/2000
  • Status: Active Grant
First Claim
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1. A mobile telephone having a back light function for illuminating a key provided in an operation section and a display section, and serving to turn OFF a lighting back light when a constant time elapsed after a key operation is completed, the mobile telephone comprising:

  • an allocating section for allocating a valid key and an invalid key to the key in the operation section corresponding to an application to be operated;

    a first back light which illuminates the most neighboring part of the valid key; and

    a second back light which illuminates the display, wherein the first back light and the second back light are turned ON when the valid key is operated.

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