Pulse width modulated spatial light modulators with offset pulses
First Claim
1. A system, comprising:
- a spatial light modulator including at least one pixel;
a pixel source including pixel data corresponding to the pixel;
a memory circuit connected to the pixel source and configured to store a pixel value corresponding to the pixel data;
a pulse width modulation circuit connected between the memory circuit and the spatial light modulator, the pulse width modulation circuit adapted to generate a pulse to drive the pixel of the spatial light modulator, wherein a duration of the pulse corresponds to the pixel value and wherein the pulse is offset with respect to a start time and an end time of a refresh cycle of the spatial light modulator; and
a control circuit connected to at least one of the memory circuit, the spatial light modulator, and the pulse width modulation circuit.
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Abstract
In some embodiments, a display system includes a spatial light modulator including at least one pixel, a pixel source including pixel data corresponding to the pixel, a memory circuit connected to the pixel source and configured to store a pixel value corresponding to the pixel data, a pulse width modulation circuit connected between the memory circuit and the spatial light modulator, the pulse width modulation circuit adapted to generate a pulse to drive the pixel of the spatial light modulator, wherein a duration of the pulse corresponds to the pixel value and wherein the pulse is offset with respect to a start time and an end time of a refresh cycle of the spatial light modulator, and a control circuit connected to at least one of the memory circuit, the spatial light modulator, and the pulse width modulation circuit. Other embodiments are described and claimed.
46 Citations
20 Claims
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1. A system, comprising:
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a spatial light modulator including at least one pixel; a pixel source including pixel data corresponding to the pixel; a memory circuit connected to the pixel source and configured to store a pixel value corresponding to the pixel data; a pulse width modulation circuit connected between the memory circuit and the spatial light modulator, the pulse width modulation circuit adapted to generate a pulse to drive the pixel of the spatial light modulator, wherein a duration of the pulse corresponds to the pixel value and wherein the pulse is offset with respect to a start time and an end time of a refresh cycle of the spatial light modulator; and a control circuit connected to at least one of the memory circuit, the spatial light modulator, and the pulse width modulation circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of pulse width modulating a pixel of a spatial light model atom comprising:
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reading a pixel value from a pixel source; offsetting an active time of a signal with respect to a start time and an end time of a refresh cycle, wherein a duration of the offset signal corresponds to the pixel value; and driving the pixel of the spatial light modulator with the offset signal. - View Dependent Claims (11, 12, 13)
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14. A pulse width modulation circuit, comprising:
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a memory adapted to store a pixel value; and a circuit configured to read the pixel value and to generate a pulse having a duration corresponding to the pixel value, the circuit being further configured to offset the pulse with respect to a start time and an end time of a refresh cycle of a spat al light modulator. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification