Microsoft Technology Licensing, LLC

Brock McCray Roland

Cyrus Soli Bamji

Dawson Yee

Barry Thompson

Minseok Oh

Zhanping Xu

Matthew D Morris

Algird Michael Gudaitis

Travis Perry

John Peter Godbaz

Chang Joon Park

Sunil Prakash Acharya

Mike Voong

Andrew Dean Payne

Rui Jin

Mike Fenton

Larry Prather

Examples are disclosed that relate to a power supply device for controlling a liquid crystal display (LCD) panel in a reliable and power efficient manner. In one example, the power supply device includes a positive-side switching converter, a negative-side switching converter, and a controller. In an active-bias mode, the controller controls the positive-side switching converter and the negative-side switching converter to alternate a polarity of a bias voltage across a positive output node and a negative output node by alternating between a forward-bias state and a reverse-bias state. In a neutral-bias mode, the controller provides a neutral bias voltage across the positive output node and the negative output node.

Polarity switching power supply device

One example provides a method of operating a time-of-flight camera system comprising an illumination source and an image sensor. The method comprises operating the illumination source and the image sensor to control a plurality of integration cycles and a plurality of readout cycles. In each integration cycle, the method comprises performing a plurality of pulse width modulated (PWM) illumination cycles where each PWM illumination cycle is separated from one or more adjacent PWM illumination cycles by a non-illumination cycle. For each PWM illumination cycle, the method comprises directing photocharge to in-pixel memory for each pixel that is performing image integration and for each non-illumination cycle conducting photocharge away from the in-pixel memory for each pixel that is performing image integration. The readout cycle comprises, for each pixel that performed image integration, reading a charge stored in the in-pixel memory after the integration cycle.

Pulse width modulated integration for time of flight imaging

Embodiments disclosed herein are directed to time-of-flight (TOF) systems, and methods for use therewith, that substantially reduce interference that the TOF system may cause to at least one other system that is configured to wirelessly receive and respond to IR light signals. Some such embodiments involve emitting IR light having a low frequency (LF) power envelope that is shaped to substantially reduce frequency content within at least one frequency range known to be used by at least one other system that may be in close proximity to the TOF system. Such embodiments can also involve detecting at least a portion of the emitted RF modulated IR light that has reflected off one or more objects. A TOF system can produce depth images in dependence on results of the detecting, as well as update an application in dependence on the depth images.

Interference reduction for TOF systems

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San Bruno, CA, United States of America

Brock McCray Roland