Communication device and display blanking control method therefo

Details Communication device and display blanking control method therefo Communication device and display blanking control method therefo

1996-08-29

1999-03-09

Britton, Howard

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

455 383, 455574, H04B 116, H04B 140, H04M 1100

Patent

active

058813772

ABSTRACT:
A method and apparatus control blanking of a display (106) in a communication device (100) such as a battery powered radiotelephone. The communication device (100) includes a clock operated blanking timer 317. When the blanking timer 317 elapses, the communication device (100) blanks the display (106) a predetermined time after a key press of a keypad (108). A switch (310) detects when the communication device (100) is in use. In response to this detection, the communication device (100) maintains supply of operating power to the display (106), overriding the blanking timer 317. When a user is holding the communication device (100) adjacent to the user's head, an earpiece sensor (312) provides an indication of this condition. In response to the indication, the display (106) is immediately blanked to conserve operating power in the battery (124).

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Motorola Cordless Telephone Owner's Manual, pp. 16-17, 1994.

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