Information handling system predictive key retraction and extension actuation
View Patent ↗An information handling system integrated keyboard selectively retracts and extends keys based upon detected conditions, such as housing configuration, housing motion and end user indications. Extension and retraction shuttle plates motivated by actuator wires moves a sliding plate to extended and retracted positions that define the key positions. Nickel titanium alloy actuator wires shorten upon application of current to pull the shuttle plates to the extended or retracted positions that are maintained by a lock. Limit switches remove current at detection of a desired shuttle plate position. One or more controllers manage actuator wire operation based upon detected conditions and actuator wire temperature and electrical characteristics.
1. An information handling system comprising:
a main housing;
processing components disposed in the main housing and operable to execute instructions that process information;
a keyboard coupled to the main housing, the keyboard having plural keys that move to accept inputs, the keys biased to extend out of the housing and moving into the housing in response to an end user press to accept end user inputs;
one or more actuator wires coupled to the keyboard and interacting with the keyboard keys to selectively retract and extend the keyboard keys, the one or more actuator wires interacting with the keyboard keys by shortening in response to application of current; and
a controller interfaced with the one or more actuator wires, the controller applying the current to retract and extend the keyboard keys based on one or more first predetermined conditions, the controller restricting application of current to the plural actuator wires based upon one or more second predetermined conditions.
2. The information handling system of claim 1 further comprising:
a first shuttle coupled to a first set of the one or more actuator wires and interacting with the keyboard keys to retract the keys; and
a second shuttle coupled to a second set of the one or more actuator wires and interacting with the keyboard keys to extend the keys.
3. The information handling system of claim 2 wherein the first predetermined condition comprises a rate of movement of first and second housing portions relative to each other.
4. The information handling system of claim 2 wherein the one or more actuator wires comprise a shape memory alloy that transitions between austenite and martensite states.
5. The information handling system of claim 2 wherein the second predetermined condition comprises a temperature of the one or more actuator wires.
6. The information handling system of claim 5 further comprising an air moving device proximate the one or more actuator wires, the air moving device providing a cooling airflow to the one or more actuator wires when current is not applied to the one or more actuator wires and the one or more actuator wires exceed a predetermined temperature.
7. The information handling system of claim 6 wherein the air moving device comprises a piezo air moving device.
8. The information handling system of claim 6 wherein the air moving device comprises an electrostatic air mover.
9. The information handling system of claim 1 wherein the second predetermined condition comprises a minimum time period after the application of current to the one or more actuator wires.
10. A method for managing an information handling system keyboard configuration, the method comprising:
monitoring at the information handling system for a first set of one or more predetermined conditions associated with keyboard key position actuation;
monitoring at the information handling system for a second set of one or more predetermined conditions associated with restricting keyboard key position actuation;
detecting at least one of the first set of one or more predetermined conditions; and
in response to the detecting, applying current to one or more actuator wires, the current shortening the wire length to actuate the keyboard keys to the associated position;
wherein:
detecting at least one of the first of one or more predetermined conditions further comprises detecting rotation of housing portions relative to each other towards a closed configuration; and
applying current to the one or more wire actuators further comprises shortening a wire length to retract the keyboard keys; and
the first one or more predetermined conditions further comprises a rate of rotation and applying current further comprises applying current a predetermined time before the rotation reaches the closed configuration based upon an angle of rotation and the rate of rotation.
11. The method of claim 10 further comprising:
detecting at least one of the first of one or more predetermined conditions further comprises detecting rotation of housing portions relative to each other towards away from a closed configuration; and
applying current to the one or more wire actuators further comprises shortening a wire length to extend the keyboard keys after the rotation of the housing portions stops.
12. The method of claim 10 further comprising removing the current upon detection of the keyboard key actuation completion.
13. A method for managing an information handling system keyboard configuration, the method comprising:
monitoring at the information handling system for a first set of one or more predetermined conditions associated with keyboard key position actuation;
monitoring at the information handling system for a second set of one or more predetermined conditions associated with restricting keyboard key position actuation;
detecting at least one of the first set of one or more predetermined conditions; and
in response to the detecting, applying current to one or more actuator wires, the current shortening the wire length to actuate the keyboard keys to the associated position;
detecting at least one of the second set of one or more predetermined conditions, the second set of one or more predetermined conditions including a temperature threshold;
in response to the detecting, restricting the applying current to the one or more actuator wires until the second set of one or more predetermined conditions changes;
removing the current upon detection of keyboard actuation completion; and
applying a cooling airflow to the one or more actuator wires upon removing the current.
14. A keyboard comprising:
plural keys arranged to accept end user key inputs;
first and second shuttles interfaced with the keys, the first shuttle to move the keys to a retracted position, the second shuttle to release the keys to an extended position;
a first set of plural actuator wires shortening in response to application of current to move the shuttle to the retracted position; and
a second set of plural actuator wires shortening in response to application of current to pull the sliding plate to the extended position; and
a keyboard manager interfaced with the first and second sets of plural actuator wires, the keyboard manager applying current in response to a first set of predetermined conditions and restricting the applying of current if the first set of predetermined conditions occur during a second set of predetermined conditions.
15. The keyboard of claim 14 wherein:
the first set of predetermined conditions comprises an angular relationship between first and second housing portions and a rate of change of the angular relationship; and
the second set of predetermined conditions comprises a temperature of one or more of the actuator wires.
16. The keyboard of claim 15 further comprising an air moving device aligned to provide cooling airflow to the one or more actuator wires if the temperature of the one or more actuator wires exceeds a threshold.