Wireless telephone for cellular telephone system
First Claim
1. A method of controlling a wireless telephone set that performs digital communication with a base station in a cellular telephone system and has light-emitting diodes for illumination, comprising the steps of:
- switching said light-emitting diodes on and off responsive to operations by a user of said wireless telephone set;
switching said light-emitting diodes on and off to alert said user to incoming calls;
identifying idle periods in which said wireless telephone set is not performing digital communication with said base station; and
synchronizing the switching of said light-emitting diodes with said idle periods, so that said light-emitting diodes are switched on and off only during said idle periods.
3 Assignments
0 Petitions
Accused Products
Abstract
A wireless telephone set that performs digital communication employs light-emitting diodes for illumination, and for alerting the user to incoming calls. To avoid disruption of carrier signal frequencies, the light-emitting diodes are switched on and off only during idle periods, such as idle time slots in time-division multiple-access communication. If the wireless telephone also has a vibrator for alerting the user to incoming calls, switching of the vibrator is similarly synchronized with the idle time periods, and the light-emitting diodes are preferably disabled while the vibrator is in use.
55 Citations
16 Claims
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1. A method of controlling a wireless telephone set that performs digital communication with a base station in a cellular telephone system and has light-emitting diodes for illumination, comprising the steps of:
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switching said light-emitting diodes on and off responsive to operations by a user of said wireless telephone set; switching said light-emitting diodes on and off to alert said user to incoming calls; identifying idle periods in which said wireless telephone set is not performing digital communication with said base station; and synchronizing the switching of said light-emitting diodes with said idle periods, so that said light-emitting diodes are switched on and off only during said idle periods. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless telephone set for communicating with a base station in a cellular telephone system, said wireless telephone set having pushbuttons, a display, light-emitting diodes for illuminating said pushbuttons and said display, and a vibrator for alerting a user to incoming calls, comprising:
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a first controller generating a first control signal for indicating when said light-emitting diodes are to be switched on and off, a second control signal indicating when said vibrator is to be switched on and off, and a third control signal indicating an interval of time during which said vibrator is repeatedly switched on and off by said second control signal; a second controller generating a fourth control signal indicating whether said wireless telephone set is synchronized with said base station, and a fifth control signal identifying idle periods when said wireless telephone set is synchronized with said base station but is neither transmitting a signal to nor receiving a signal from said base station; a logic circuit coupled to said first controller for generating a sixth control signal that is identical to said first control signal when said third control signal does not indicate said interval of time, said sixth control signal being inactive when said third control signal indicates said interval of time; a first timing adjustment circuit coupled to said first controller and said second controller, for combining said fourth control signal, said fifth control signal, and said sixth control signal to generate a seventh control signal that switches said light-emitting diodes on and off; and a second timing adjustment circuit coupled to said first controller and said second controller, for combining said second control signal, said fourth control signal, and said fifth control signal to generate an eighth control signal that switches said vibrator on and off;
whereinwhen said fourth control signal indicates that said wireless telephone set is not synchronized with said base station, said seventh control signal responds to and is synchronized with said sixth control signal, and said eighth control signal responds to and is synchronized with said second control signal; and when said fourth control signal indicates that said wireless telephone set is synchronized with said base station, said seventh control signal responds to said sixth control signal in synchronization with said fifth control signal, so that transitions of said seventh control signal occur only during said idle periods, and said eighth control signal responds to said second control signal in synchronization with said fifth control signal, so that transitions of said eighth control signal occur only during said idle periods. - View Dependent Claims (8, 9, 10)
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11. A wireless telephone set for communicating with a base station in a cellular telephone system, said wireless telephone set having pushbuttons, a display, and light-emitting diodes for illuminating said pushbuttons and said display, comprising:
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a first controller generating a first control signal indicating when said light-emitting diodes are to be switched on and off; a second controller generating a second control signal indicating whether said wireless telephone set is synchronized with said base station, and a third control signal identifying idle periods when said wireless telephone set is synchronized with said base station but is neither transmitting a signal to nor receiving a signal from said base station; and a timing adjustment circuit coupled to said first controller and said second controller, for combining said first control signal, said second control signal, and said third control signal to generate a fourth control signal that switches said light-emitting diodes on and off;
whereinwhen said second control signal indicates that said wireless telephone set is not synchronized with said base station, said fourth control signal responds to and is synchronized with said first control signal; and when said second control signal indicates that said wireless telephone set is synchronized with said base station, said fourth control signal responds to said first control signal in synchronization with said third control signal, so that transitions of said fourth control signal occur only during said idle periods. - View Dependent Claims (12, 13)
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14. A wireless telephone set for communicating with a base station in a cellular telephone system, said wireless telephone set having a vibrator for alerting a user to incoming calls, comprising:
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a first controller generating a first control signal indicating when said vibrator should be switched on and off; a second controller generating a second control signal indicating whether said wireless telephone set is synchronized with said base station, and a third control signal identifying idle periods when said wireless telephone set is synchronized with said base station but is neither transmitting a signal to nor receiving a signal from said base station; and a timing adjustment circuit coupled to said first controller and said second controller, for combining said first control signal, said second control signal, and said third control signal to generate a fourth control signal that switches said vibrator on and off;
whereinwhen said second control signal indicates that said wireless telephone set is not synchronized with said base station, said fourth control signal responds to and is synchronized with said first control signal; and when said second control signal indicates that said wireless telephone set is synchronized with said base station, said fourth control signal responds to said first control signal in synchronization with said third control signal, so that transitions of said fourth control signal occur only during said idle periods. - View Dependent Claims (15, 16)
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Specification