Information handling system including dynamic configuration of piezoelectric transducers for multi-functionality
An information handling system includes an outer housing and a processor and a memory disposed in the outer housing. The processor is configured to execute instructions to process information. The memory is configured to store the information. The information handling system includes a piezoelectric transducer disposed in the outer housing and mechanically coupled to a surface held by the outer housing. The information handling system includes a sensor disposed in the outer housing and configured to generate an indicator of user presence in a zone proximate to the piezoelectric transducer and above a second side of the surface. The information handling system includes a controller disposed in the outer housing and coupled to the memory. The controller is configured to selectively configure the piezoelectric transducer to be responsive to a first subsystem or to be responsive to a second subsystem according to the indicator of user presence.
1. An information handling system comprising:
an outer housing;
a processor disposed in the outer housing, the processor being configured to execute instructions to process information;
a memory disposed in the outer housing, the memory being configured to store the information;
a piezoelectric transducer disposed in the outer housing and mechanically coupled to a first side of a surface held by the outer housing;
a sensor disposed in the outer housing and configured to generate a signal indicative of user presence in a zone proximate to the piezoelectric transducer and above a second side of the surface;
a first subsystem;
a second subsystem;
a second piezoelectric transducer; and
a controller disposed in the outer housing,
wherein in a dynamic mode of operating the information handling system, the controller configures the piezoelectric transducer to be responsive to the first subsystem if the signal indicates a user is absent from a zone proximate to the information handling system, and configures the piezoelectric transducer to be responsive to the second subsystem if the signal indicates a user is present in the zone proximate to the information handling system,
wherein the controller configures the piezoelectric transducer to be responsive to the second subsystem in response to the user being present in the zone proximate to the piezoelectric transducer and the controller configures the second piezoelectric transducer to be responsive to the first subsystem in response to the user being absent from an additional zone proximate to the second piezoelectric transducer.
2. The information handling system as recited in claim 1
wherein the first subsystem is an audio subsystem and the piezoelectric transducer is configured to vibrate the surface as part of a distributed mode loudspeaker in response to the signal indicating an absence of the user in the zone proximate to the piezoelectric transducer.
3. The information handling system as recited in claim 1
wherein the second subsystem is a haptic feedback subsystem and the piezoelectric transducer is configured to vibrate the surface locally according to the haptic feedback subsystem in response to the signal indicating presence of the user in the zone proximate to the piezoelectric transducer.
4. The information handling system as recited in claim 1 further comprising:
additional piezoelectric transducers configured to be responsive to the first subsystem,
wherein the first subsystem is configured to adjust parameters of the additional piezoelectric transducers in response to configuration of the piezoelectric transducer to be responsive to the second subsystem.
5. The information handling system as recited in claim 4 , wherein the parameters include intensity and frequency response of displacement of a piezoelectric material in the piezoelectric transducer with respect to the surface.
6. The information handling system as recited in claim 4 , wherein each of the piezoelectric transducer and the additional piezoelectric transducers is configured to be responsive to the first subsystem or the second subsystem according to a predetermined subsystem assignment prior to detecting the presence of the user in the zone proximate to the piezoelectric transducer.
7. The information handling system as recited in claim 6 , wherein the controller configures the piezoelectric transducer and the additional piezoelectric transducers to be responsive to the second subsystem if the first subsystem is disabled.
8. The information handling system as recited in claim 1 , wherein the sensor includes a proximity detector, a pressure sensor, or a camera.
9. The information handling system as recited in claim 1 , wherein the surface is a touchscreen disposed in the outer housing.
10. The information handling system as recited in claim 1 wherein the signal indicates the user is present in the zone proximate to the information handling system and the controller configures the piezoelectric transducer to be responsive to the first subsystem before the signal indicates the user is present in the zone proximate to the information handling system and before the controller configures the piezoelectric transducer to be responsive to the second subsystem.
11. The information handling system as recited in claim 1 wherein the signal indicates the user is absent from the zone proximate to the information handling system and the controller configures the piezoelectric transducer to be responsive to the second subsystem before the signal indicates the user is absent from the zone proximate to the information handling system and before the controller configures the piezoelectric transducer to be responsive to the first subsystem.
12. The information handling system as recited in claim 1 wherein the signal indicates the user is present and the controller determines whether the piezoelectric transducer is generating sound and selectively adjusts other transducers for a consistent audio experience based on the determination.
13. The information handling system as recited in claim 1
wherein the information handling system has another mode of operation, and
wherein in the other mode of operation, the controller configures the piezoelectric transducer to be responsive to only the first subsystem or only the second subsystem according to a predetermined configuration.
14. An apparatus comprising:
a plurality of piezoelectric transducers;
a surface mechanically coupled to the plurality of piezoelectric transducers;
a plurality of sensors, each sensor of the plurality of sensors being configured to generate a corresponding indicator of user presence proximate to a corresponding piezoelectric transducer of the plurality of piezoelectric transducers;
an audio subsystem;
a haptic feedback subsystem; and
a controller configured to selectively configure each piezoelectric transducer of the plurality of piezoelectric transducers according to the corresponding indicator of user presence, each piezoelectric transducer being configured by the controller to generate vibrations as part of a distributed mode loudspeaker according to the audio subsystem in response to the corresponding indicator of user presence having a first value and to generate local vibrations according to the haptic feedback subsystem in response to the corresponding indicator of user presence having a second value.
15. The apparatus as recited in claim 14
wherein the audio subsystem is configured to generate piezoelectric transducer control signals that cause the piezoelectric transducers to generate vibrations as part of the distributed mode loudspeaker,
wherein in response to a configuration change of a first piezoelectric transducer of the plurality of piezoelectric transducers from being part of the distributed mode loudspeaker to being responsive to the haptic feedback subsystem, the audio subsystem is configured to adjust the piezoelectric transducer control signals to compensate for the configuration change to maintain a consistent audio experience using other piezoelectric transducers of the piezoelectric transducers.
16. The apparatus as recited in claim 14 , wherein the surface is a touchscreen disposed in an outer housing of an information handling system.
17. The apparatus as recited in claim 14 , wherein the plurality of piezoelectric transducers are distributed across the surface according to a natural resonant model of the surface.