Abstract: A display module with infra-red (IR) light emitting capabilities is disclosed. A display module in a housing may have IR light emitting capabilities. The display module may include a transmissive display element. IR light emitted by an IR illuminant formed at an edge of the display module housing may be optically coupled to the display element using a dispersive element. An IR shutter may be interposed between the dispersive element and the display element. Control circuitry may configure the IR shutter to filter IR light in selected regions of the IR shutter. An image of a scene may be captured while the scene is illuminated by IR light emitted through the IR filter and the display element using an image sensor. The image sensor may be external to the display module housing, or it may be formed inside the display module housing and receive light incident on the display element.

Abstract: A technique for the reduction of coherent row-wise and column-wise fixed-pattern noise in MOS image sensing systems. An array of reference pixels is associated with each row of imaging pixels. The output of each imaging pixel is coupled through a respective imaging column amplifier to a column multiplexer, thereby constituting an imaging pixel signal. In one embodiment, the output of each of a number of reference pixels is coupled to a respective reference column amplifier and from there to a reference multiplexer. The reference multiplexer effects a pseudorandom selection from the outputs of the reference column amplifiers to form a reference signal. The reference signal and the column output are differentially coupled to the remainder of the analog signal path. Synthesis of the reference signal as described above distributes row-wise and column-wise noise randomly, thereby mitigating the effects of coherent noise and enhancing image quality.

Abstract: A technique for the reduction of coherent row-wise and column-wise fixed-pattern noise in MOS image sensing systems. An array of reference pixels is associated with each row of imaging pixels. The output of each imaging pixel is coupled through a respective imaging column amplifier to a column multiplexer, thereby constituting an imaging pixel signal. In one embodiment, the output of each of a number of reference pixels is coupled to a respective reference column amplifier and from there to a reference multiplexer. The reference multiplexer effects a pseudorandom selection from the outputs of the reference column amplifiers to form a reference signal. The reference signal and the column output are differentially coupled to the remainder of the analog signal path. Synthesis of the reference signal as described above distributes row-wise and column-wise noise randomly, thereby mitigating the effects of coherent noise and enhancing image quality.