Snap Inc.

Aaron Boyce

Ian Kyles

Glen Sands

Edmund Passon

A method and system for controlling a pixel of a display using pulse width modulation (PWM). A desired grayscale value for the pixel is processed to generate a binary encoding having a plurality of select bits encoding a select value, and a dither bit encoding a dither value, encoded by a scheme in which a first select value and a first dither value indicate a center-aligned pulse of a first width having a leading edge at a first temporal position, a second select value and the first dither value indicates a center-aligned pulse of a second width having a leading edge at a second temporal position, and the first select value and a second dither value indicate a center-aligned pulse of a second width having a leading edge at the first temporal position. The binary encoding is provided to the display for pulse width modulation of the pixel.

Modulating a center aligned PWM pulse applying trailing dither

Updating an image displayed on a display device. The display device includes pixels in a pixel array. A system comprising a display subsystem for executing commands and displaying images, said display subsystem comprising a parser for receiving the image frame data, wherein the parser extracts updated image data and the commands. The system includes a storage device for storing the updated image data in a updated cache location according to the commands. The system includes a loader for reading the commands to identify and fetch the updated image data from the storage device. The system includes display backplane circuitry for receiving the updated image data from the loader and for updating pixel driver circuity for pixels within the updated image data. The embodiments herein can be used for driving micro-displays such as LCoS micro-LED displays.

Updating an image displayed on a display device

A system for updating an image on a display device includes pixels in a pixel array. The system includes a display subsystem for executing commands and displaying images, the display subsystem also includes a parser for receiving image frame data, and extracting updated image data and commands. A storage device is used for storing the updated image data in an updated cache location according to the commands. A loader is used for reading the commands to identify and fetch the updated image data from the storage device. Display backplane circuitry is used for receiving the updated image data from the loader and for updating pixel driver circuity for pixels within the updated image data. The examples described are ideal for driving micro-displays such as LCoS micro-LED displays.

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Tigard, OR, United States of America

Aaron Boyce