Abstract: Devices and methods for adjusting an exposure window of a rolling shutter based on a frequency determined from ambient light gathered by a bimodal component are disclosed. Flickering light sources may cause artifacts in captured images, due to interplay between a period of a frequency of ambient light and the exposure window. An image capture device includes a semiconductor component configured to operate in two modes and an exposure window control component configured to compensate for the flickering based on a signal from the light source. In a sensor mode, the semiconductor component may operate to detect the frequency of ambient light. To avoid image artifacts, the frequency of the ambient light is analyzed and an exposure time is adjusted to an integer multiple of the period of the frequency such that exposure is matched to the periodic illumination of the flickering light source.

Abstract: Devices and methods for adjusting an exposure window of a rolling shutter based on a frequency determined from ambient light gathered by a bimodal component are disclosed. Flickering light sources may cause artifacts in captured images, due to interplay between a period of a frequency of ambient light and the exposure window. An image capture device includes a semiconductor component configured to operate in two modes and an exposure window control component configured to compensate for the flickering based on a signal from the light source. In a sensor mode, the semiconductor component may operate to detect the frequency of ambient light. To avoid image artifacts, the frequency of the ambient light is analyzed and an exposure time is adjusted to an integer multiple of the period of the frequency such that exposure is matched to the periodic illumination of the flickering light source.

Abstract: A method for generating an ambient light rejected output image includes providing a sensor array including a two-dimensional array of digital pixels where the digital pixels output digital signals as digital pixel data representing the image of the scene, capturing a pair of images of a scene within the time period of a video frame using the sensor array where the pair of images includes a first image being illuminated by ambient light and a second image being illuminated by the ambient light and a light source, storing the digital pixel data associated with the first and second images in a data memory, and subtracting the first image from the second image to obtain the ambient light rejected output image.

Abstract: A system and method for generating timing signals in an electronic imaging device includes a horizontal timing generator with a first programmable memory for storing a set of timing information and a vertical timing generator with a second programmable memory for providing a set of control information which is used to selectively generate the timing signals from the set of timing information in the first programmable memory.

Abstract: A rotary control knob is adapted to provide for automatic switching between two modes of movement control for a tape transport. An insulative ring surrounds a conductive knob, and the conductive knob is electrically connected to an oscillator circuit. Changes in the oscillator frequency due to operator contact with the conductive knob during movement of the knob are sensed to produce one mode of movement control, while movement of the knob due to operator contact with the insulative ring do not affect the oscillator frequency and indicate an alternative, default mode of movement control. A stepper motor is mechanically coupled to the control knob, and is electrically engaged in the default mode and disengaged in the one mode.