Illumination modulation technique for microdisplays
First Claim
Patent Images
1. A method comprising:
- pulse width modulating the duty cycle of a light beam to establish a pixel intensity; and
varying the duty cycle between two frames.
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Abstract
A projection display may use pulse width modulation wherein the duty cycle may be varied. This duty cycle variation may improve bit depth in some embodiments. For example, on alternate frames, the duty cycle may be reduced by a given percentage.
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Citations
25 Claims
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1. A method comprising:
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pulse width modulating the duty cycle of a light beam to establish a pixel intensity; and
varying the duty cycle between two frames. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A projection display comprising:
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a spatial light modulator; and
a device to vary the duty cycle of pulse width modulation between two frames. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A spatial light modulator comprising:
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a modulating panel; and
a device to vary the duty cycle of pulse width modulation of said modulator between successive frames. - View Dependent Claims (22, 23, 24, 25)
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Specification