Blackberry Corporation

Research in Motion Corporation

Other

Christopher James Grant

Robert George Oliver

Xin Jin

Adam Louis Parco

Nathan Daniel Pozniak Buchanan

Andrew Jonathan Gilbert Rosselet

Kevin Howard Orr

Arnett Ryan Weber

Kuo-Feng Tong

Aleksandar Papo

Marc Edward Holbein

Conor Michael O'Neill

Katarina Pavlikova

Yingying Lu

Nathan Daniel Buchanan

Andrew Jonathan Rosselet

Conor Michael O`neill

Aleksandar Sasha Papo

Methods and devices for determining a timestamp that represents a time a sensor sample was generated are described. In one aspect, a method includes: obtaining a sampling rate estimate for the sensor; determining an expected sample time based on the sampling rate estimate; detecting a sensor sample and assigning a reporting time to the detected sensor sample, the reporting time representing the time when the sensor sample was detected; and determining the timestamp for the sensor sample based on the expected sample time and the reporting time.

Time stamping a sensor sample

In one aspect, the present disclosure provides a processor-implemented method of determining a bias for an axis of a gyroscope. The method includes: obtaining a temperature reading; maintaining a plurality of bias estimators for the axis, each bias estimator associated with a temperature and configured to estimate a bias at the associated temperature, the plurality of bias estimators including a number of short term bias estimators for estimating biases for recently obtained temperatures and a number of long term bias estimators for estimating biases for temperatures obtained over a comparatively longer period of time; and determining a bias for the axis of the gyroscope based on the temperature reading and one or more of the bias estimators.

Method and devices for temperature-based determination of gyroscope bias

A method of indicating an interference magnetic field at an electronic device includes: displaying a first arrow indicating a direction of magnetic north on a display of the electronic device, the direction of the first arrow corrected to remove interference caused by an interference magnetic field; and displaying a second arrow indicating a direction of a source of the interference magnetic field on a display of the electronic device.

Electronic device magnetic interference indication method

Methods of waking a portable electronic device are disclosed. In one embodiment, the method comprises: causing the portable electronic device to enter a sleep mode in which a touch-sensitive display is deactivated a force sensing transducer measures forces applied to the touch-sensitive display at a reduced rate relative to a rate of a full power mode when in the sleep mode; causing a force sensing transducer to measure forces applied to the touch-sensitive display at the rate of the full power mode in response to detection of an inertial event; causing the touch-sensitive display to be reactivated in response to detection of a force which is greater than a predetermined wake force threshold; and causing the portable electronic device to wake in response to detection of a touch event within a first predetermined duration of the detection of the force which is greater than a predetermined wake force threshold.

Method of waking up and a portable electronic device configured to perform the same

A method of detecting and recovering from stuck keys on an electronic device keyboard comprises receiving one or more messages by a processor based upon a predetermined periodic scan rate and each message corresponding to a pressed key, determining one of the pressed keys is a stuck key based upon the received one or more messages corresponding to a pressed key, sending a mock key-up message from the processor to a keyboard controller in response to the determined stuck key, operating the keyboard controller at a changed scan rate in response to the mock key-up message, detecting the electronic device keyboard is in a released key state by the processor; and operating the keyboard controller at the predetermined periodic scan rate in response to the detected released key state. The processor can include two components, such as a keyboard processor and a keyboard controller.

Method to detect and recover from stuck keys on an electronic device keyboard

A method includes detecting, at a first time, a first touch associated with a first touch value that meets one of a first touch threshold and a second touch threshold, detecting, at a second time, a second touch associated with a second touch value that meets one of the first touch threshold and the second touch threshold, providing first tactile feedback at the first time, and providing second tactile feedback at the second time when the time period between the first time and the second time meets a time threshold.

Method of providing tactile feedback and electronic device

A method and apparatus for estimating oscillator signal variation due to temperature and for providing an estimated frequency to a GPS receiver in order to assist the GPS receiver to acquire the signals quickly is disclosed. A temperature sensor is closely thermally coupled with the crystal oscillator in the GPS receiver and during GPS tracking mode, when the error in the oscillator signal is known with precision, outer bounds of TCXO frequency at given temperatures are maintained, which may correspond to rising and falling temperature conditions. During acquisition mode, an estimated frequency value is provided to the GPS receiver based on a determined average of these bounds. Optionally, an uncertainty factor associated with the frequency estimated may also be provided. The two bounds take into account the hysteresis effects of the oscillator signal drift due to temperature so that a more accurate initial frequency estimate can be provided to the GPS receiver, thus reducing its average time to first fix.

Frequency aiding method and system for navigation satellite receiver with crystal oscillator frequency hysteresis

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Waterloo, Canada

Christopher James Grant