Ultrasonic proximity detector for a telephone device
First Claim
Patent Images
1. A telephone device comprising:
- a telephone set;
at least one speaker associated with said telephone set to broadcast output audio signals;
a handset associated with said telephone set and having a microphone to receive input audio signals; and
an ultrasound proximity detect unit comprising;
an ultrasound generator generating ultrasound that is broadcast by said speaker;
processing circuitry coupled to said microphone, said processing circuitry processing broadcast ultrasound that is picked up by said microphone to detect the proximity of said handset to said telephone set; and
an ultrasound waveguide extending from adjacent said speaker to a portion of a cradle of said telephone set accommodating the handset microphone.
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Abstract
An ultrasonic proximity detector for a telephone device to detect the proximity of an object thereto includes an ultrasound signal generator generating ultrasound that is broadcast by a speaker of the telephone device. Processing circuitry is coupled to a microphone of the telephone device. The processing circuitry processes broadcast ultrasound that is picked up by the microphone to detect the proximity of an object to the telephone device.
35 Citations
10 Claims
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1. A telephone device comprising:
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a telephone set; at least one speaker associated with said telephone set to broadcast output audio signals; a handset associated with said telephone set and having a microphone to receive input audio signals; and an ultrasound proximity detect unit comprising; an ultrasound generator generating ultrasound that is broadcast by said speaker; processing circuitry coupled to said microphone, said processing circuitry processing broadcast ultrasound that is picked up by said microphone to detect the proximity of said handset to said telephone set; and an ultrasound waveguide extending from adjacent said speaker to a portion of a cradle of said telephone set accommodating the handset microphone. - View Dependent Claims (2, 3, 4, 5)
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6. A telephone device comprising:
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a telephone set; a handset coupled to said telephone set; a cradle on said telephone set to accommodate said handset; a keypad on said telephone set; a loudspeaker and microphone assembly accommodated by said telephone set; circuitry within said telephone set to handle incoming and outgoing telephone calls; and an ultrasonic proximity detector accommodated by said telephone set, said ultrasonic proximity detector comprising; an ultrasound generator generating ultrasound that is broadcast by said loudspeaker and microphone assembly; processing circuitry coupled to said loudspeaker and microphone assembly, said processing circuitry processing broadcast ultrasound that is picked up by said loudspeaker and microphone assembly to detect the proximity of said handset to said telephone set; and an ultrasound waveguide extending from adjacent said loudspeaker and microphone assembly to a portion of the cradle accommodating the handset microphone. - View Dependent Claims (7, 8, 9, 10)
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Specification