Constant-weight bit-slice PWM method and system for scrolling color display systems
AssigneeTexas Instruments Incorporated
InventorsDaniel J. Morgan, Donald B. Doherty, William J. Sexton
Life of this patent
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Abstract
A display system 100 includes a light source 110 and a color wheel 114. An optical section 112 is arranged to receive light from the light source 110 and to direct the light toward a color wheel 114. A digital micromirror device 122 is arranged to receive the light from the color wheel 114 and to direct image data toward a display. The image data includes an array of pixels arranged in rows and columns. The array of pixels is arranged as curved color bands during a first time period and rectangular color bands during a second time period. The second time period being concurrent with but of a shorter duration than the first time period.
Claims63
A method of generating data for a color display, the method comprising:
- receiving a plurality of digital data signals, the digital data signals representing bits of data to be displayed during a frame, the bits of data comprising different color bits;
- arranging the bits of data into a plurality of constant-weight segments so that the data displayed during each of a plurality of equal length time periods will comprise a plurality of color bands;
- and
- providing the segments to a digital display system.
A display system comprising:
- a light source;
- a color wheel;
- an optical section arranged to receive light from the light source and direct the light toward a color wheel;
- and
- a digital micromirror device arranged to receive the light from the color wheel and to direct image data toward a display, wherein the image data comprises an array of pixels arranged in rows and columns and wherein the array of pixels comprises pixels of at least three colors that are to be displayed simultaneously.
The system of claim 39 wherein the processor comprises a microprocessor.
A digital display system comprising:
- a digital video source;
- a sequencer receiving control signals from the video source;
- a data formatter receiving data signals from the video source;
- a graphics memory receiving formatted data signals from the data formatter, wherein the formatted data signals are arranged in a series of bit-planes, at least some of the bit-planes including data related to more than one color;
- and
- a spatial light modulator with a control input coupled to the sequencer and a data input coupled to the graphics memory.
Dependencies are inferred from the claim text.