| Patent application number | Description | Published |
|---|
| 20090278735 | FREQUENCY AIDING METHOD AND SYSTEM FOR NAVIGATION SATELLITE RECEIVER WITH CRYSTAL OSCILLATOR FREQUENCY HYSTERESIS - 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. | 11-12-2009 |
| 20100328111 | METHOD TO DETECT AND RECOVER FROM STUCK KEYS ON AN ELECTRONIC DEVICE KEYBOARD - 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. | 12-30-2010 |
| 20110080349 | METHOD OF WAKING UP AND A PORTABLE ELECTRONIC DEVICE CONFIGURED TO PERFORM THE SAME - The present disclosure provides a method of waking a portable electronic device and a portable electronic device configured to perform the same. In accordance with one embodiment, there is provided a method of conserving power on a portable electronic device, the portable electronic device having a device housing which comprises a touch-sensitive display, an accelerometer, and a force sensing transducer, the method comprising: causing the portable electronic device to enter a sleep mode in response to a trigger condition, wherein the touch-sensitive display is deactivated in the sleep mode and the 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; detecting an inertial event using the accelerometer; causing the 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; detecting forces applied to the touch-sensitive display using the force sensing transducer at the rate of the full power mode; causing the touch-sensitive display to be reactivated in response to detection of a force which is greater than a predetermined wake force threshold; detecting touch events on the touch-sensitive display; and causing the portable electronic device to wake from the sleep mode 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. | 04-07-2011 |
| 20110148608 | PORTABLE ELECTRONIC DEVICE AND METHOD OF CONTROL - A method includes generating an actuation signal for tactile feedback, wherein the tactile feedback comprises a ramp-up segment that comprises at least one ramp-up characteristic that changes during the ramp-up segment and providing tactile feedback to a display in response to the actuation signal. | 06-23-2011 |
| 20110205113 | FREQUENCY AIDING METHOD AND SYSTEM FOR NAVIGATION SATELLITE RECEIVER WITH CRYSTAL OSCILLATOR FREQUENCY HYSTERESIS - 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. | 08-25-2011 |
| 20110248839 | PORTABLE ELECTRONIC DEVICE AND METHOD OF CONTROLLING SAME - A method includes detecting a touch at a touch location on a touch-sensitive display of an electronic device, identifying a first threshold value associated with the touch location, comparing the first threshold value to a force value related to the touch, and providing a first tactile feedback in response to determining that the force value meets the first threshold value. | 10-13-2011 |
| 20110248930 | PORTABLE ELECTRONIC DEVICE AND METHOD OF CONTROLLING SAME TO PROVIDE TACTILE FEEDBACK - A method includes detecting a touch at a touch location on a touch-sensitive display of an electronic device, identifying a first tactile feedback associated with the touch location, and providing the first tactile feedback in response to determining that a force value related to the touch meets a first threshold value. | 10-13-2011 |
| 20110248931 | TACTILE FEEDBACK FOR TOUCH-SENSITIVE DISPLAY - An electronic device includes a touch-sensitive display, an actuator configured to impart a force on the touch-sensitive display to provide tactile feedback, and a controller configured to detect a touch based on input from the touch-sensitive display and to initiate the tactile feedback by the actuator. | 10-13-2011 |
