Abstract: A user input device to generate a shutter threshold adaptive to ambient light conditions. The user input device includes a sensor array, a shutter controller, and a threshold generator. The sensor array obtains image data in response to light incident on the sensor array. The shutter controller is coupled to the sensor array. The shutter controller controls a shutter time during which the sensor array is responsive to the light incident on the sensor array according to a shutter value. The threshold generator is coupled to the shutter controller. The threshold generator dynamically generates a shutter threshold corresponding to the shutter value. The shutter threshold defines a transition of a finger-on/off state.

Abstract: A user device is disclosed which includes a touch input and a keypad input. The user device is configured to operate in a gesture capture mode as well as a navigation mode. In the navigation mode, the user interfaces with the touch input to move a cursor or similar selection tool within the user output. In the gesture capture mode, the user interfaces with the touch input to provide gesture data that is translated into key code output having a similar or identical format to outputs of the keypad.

Abstract: A user input device to generate a shutter threshold adaptive to ambient light conditions. The user input device includes a sensor array, a shutter controller, and a threshold generator. The sensor array obtains image data in response to light incident on the sensor array. The shutter controller is coupled to the sensor array. The shutter controller controls a shutter time during which the sensor array is responsive to the light incident on the sensor array according to a shutter value. The threshold generator is coupled to the shutter controller. The threshold generator dynamically generates a shutter threshold corresponding to the shutter value. The shutter threshold defines a transition of a finger-on/off state.

Abstract: A system and method for selectively setting an optical navigation resolution utilizes a comparison of a comparison displacement value to a threshold value to set the optical navigation resolution to an effective resolution selected from a plurality of effective resolutions. The comparison displacement value is based on at least one of a first displacement value in a first direction and a second displacement value in a second direction, which were derived for estimating motion.

Abstract: A system and method for selectively setting an optical navigation resolution utilizes a comparison of a comparison displacement value to a threshold value to set the optical navigation resolution to an effective resolution selected from a plurality of effective resolutions. The comparison displacement value is based on at least one of a first displacement value in a first direction and a second displacement value in a second direction, which were derived for estimating motion.

Abstract: An optical navigation device that regulates the brightness of an adjustable light source, and a method thereof, are described. Light from the light source is emitted onto a surface and reflected from the surface to a sensor. The light received by the sensor is used to measure movement of the optical navigation device relative to the surface. A light-sensitive device also receives light from the light source. The brightness of the light source can be adjusted according to the amount of light received at the light-sensitive device.

Abstract: A system and method of ambient light detection with digitized output. A light sensitive device is coupled to electronic circuitry for receiving an output of the light sensitive device corresponding to a level of ambient light. The electronic circuitry compares the output to a threshold level. The threshold level corresponds to a desired level of light. The electronic circuitry for provides an output signal indicative of said desired level of light.

Abstract: A system and method of ambient light detection with digitized output. A light sensitive device is coupled to electronic circuitry for receiving an output of the light sensitive device corresponding to a level of ambient light. The electronic circuitry compares the output to a threshold level. The threshold level corresponds to a desired level of light. The electronic circuitry for provides an output signal indicative of said desired level of light.