Boundary dispersion for artifact mitigation
AssigneeTexas Instruments Incorporated
InventorsDaniel J. Morgan, Gregory J. Hewlett, Peter F. VanKessel
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Abstract
A method and system providing boundary dispersion to pixel values displayed on a binary spatial light modulator to reduce temporal contouring artifacts. Pixel code values are offset from a nominal value when displayed on the SLM to disperse a large bit transition for a pulse width modulation (PWM) system. The offset value varies as a function of the pixel digital code, the pixel spatial location on the screen, and pixel temporal location in time. The set of offsets applied to pixels is varied over a repeating sequence of 2 displayed frames.
Claims10
A method of displaying digital video data comprising pixel values, said method comprising the steps of:
- offsetting a first pixel value a first predetermined amount to form a first offset pixel value and displaying said first offset pixel value during a first display frame;
- and
- offsetting said first pixel value by the opposite of said first predetermined amount to form a second offset pixel value and displaying said second offset pixel value during a second display frame, such that the average of said displayed first offset pixel value and said second offset pixel value is said first pixel value.
A system of displaying digital video data comprising pixel values, comprising:
- a logic circuit offsetting a first pixel value a first predetermined amount to form a first offset pixel value, said logic circuit also offsetting said first said pixel value by the opposite of said first predetermined amount to form a second offset pixel value;
- and
- display means displaying said first offset pixel value during a first display frame and displaying said second offset pixel value during a second display frame, such that the average of said displayed first offset pixel value and said second offset pixel value is said first pixel value.
Dependencies are inferred from the claim text.