Duty cycle calculation and implentation for solid state illuminators
AssigneeTexas Instruments Incorporated
InventorTodd Alan Clatanoff
Life of this patent
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Abstract
A display uses x illuminator systems to produce x primary colors and y overlap colors, which are combinations of primary colors, to illuminate a spatial light modulator in a display system. A first set of n duty cycles for the x primary colors over a frame is provided, wherein the display system can select any one of the duty cycles to produce a desired white point. A second set of n duty cycles of x+y colors over a frame corresponding to the first set of duty cycles is determined, where the second set of duty cycles are generated responsive to a specified desired allocation of the frame to the y overlap colors, such that each of the overlap colors can be displayed from a dark shade to a bright shade while maintaining a constant color point.
Claims27
A method of controlling x illuminator systems to produce of x respective primary colors using a single one of the illuminator systems and y distinct overlap colors using two or more illuminator systems to illuminate a spatial light modulator in a display system, comprising the steps of:
- providing a first set of n duty cycles of the x primary colors over a frame, wherein the display system can select one of the duty cycles to produce a desired white point;
- determining an second set of n duty cycles of x+y colors over a frame corresponding to the first set of duty cycles, where the second set of duty cycles are generated responsive to a specified desired allocation of the frame to the y overlap colors, such that each of the overlap colors can be displayed from a dark shade to a bright shade while maintaining a constant color point.
A display system comprising:
- x illuminator systems to produce of x respective primary colors using a single one of the illuminator systems and y distinct overlap colors using two or more illuminator systems, said illuminator systems illuminating a spatial light modulator in a display system;
- an electronically readable table including a first set of n duty cycles of the x primary colors over a frame, wherein the display system can select one of the duty cycles to produce a desired white point;
- processing circuitry for determining an second set of n duty cycles of x+y colors over a frame corresponding to the first set of duty cycles, where the second set of duty cycles are generated responsive to a specified desired allocation of the frame to the y overlap colors, such that each of the overlap colors can be displayed from a dark shade to a bright shade while maintaining a constant color point.
Dependencies are inferred from the claim text.