Proximity sensing

A non-transitory computer readable medium that stores instructions that once executed by a computerized device cause the computerized device to:

• transmit, by at least one transmitter of the computerized device, a first transmitted ultrasonic signal and a second transmitted ultrasonic signal, wherein the first transmitted ultrasonic signal is transmitted during a first transmission window, wherein the second transmitted ultrasonic signal is transmitted during a second transmission window that follows the first transmission window;
• operate at least one receiver of the computerized device during a first reception window related to the first transmission window to receive any reflected ultrasonic signals that were reflected by one or more objects;
• determine an absence or presence of the one or more objects proximate to the at least one transmitter based on at least one of (a) an absence of reflected ultrasonic signals received by the at least one receiver during the first reception window, and (b) reflected ultrasonic signals received by the at least one receiver during the first reception window;
• and
• set a strength of the second transmitted ultrasonic signal transmitted during the second transmission window based on the absence or presence of the one or more objects, wherein the strength of the second transmitted ultrasonic signal is set to be lower than a strength of the first transmitted ultrasonic signal transmitted during the first transmission window in response to a determination of the presence of the one or more objects based on the reflected ultrasonic signals received by the at least one receiver during the first reception window, and the strength of the second transmitted ultrasonic signal is set to exceed the strength of the first transmitted ultrasonic signal transmitted during the first transmission window in response to a determination of the absence of the one or more objects based on the absence of reflected ultrasonic signals received during the first reception window.

A computerized device having proximity sensing capabilities, the computerized device comprises at least one transmitter, at least one receiver, and at least one processing circuit;

• wherein the at least one transmitter is configured to transmit a first transmitted ultrasonic signal and a second transmitted ultrasonic signal, wherein the first transmitted ultrasonic signal is transmitted during a first transmission window, wherein the second transmitted ultrasonic signal is transmitted during a second transmission window that follows the first transmission window;
• wherein the at least one receiver is configured to operate during a first reception window related to the first transmission window to receive any reflected ultrasonic signals that were reflected by one or more objects;
• wherein the at least one processing circuit is configured to:
• determine an absence or presence of the one or more objects proximate to the at least one transmitter based on at least one of (a) an absence of reflected ultrasonic signals received by the at least one receiver during the first reception window, and (b) reflected ultrasonic signals received by the at least one receiver during the first reception window;
• and
• set a strength of the second transmitted ultrasonic signal transmitted during the second transmission window based on the absence or presence of the one or more objects, wherein the strength of the second transmitted ultrasonic signal is set to be lower than a strength of the first transmitted ultrasonic signal transmitted during the first transmission window in response to a determination of the presence of the one or more objects based on the reflected ultrasonic signals received by the at least one receiver during the first reception window, and the strength of the second transmitted ultrasonic signal is set to exceed the strength of the first transmitted ultrasonic signal transmitted during the first transmission window in response to a determination of the absence of the one or more objects based on the absence of reflected ultrasonic signals received during the first reception window.