Patent
Modulated-amplitude illumination for spatial light modulator
TLDR
In this paper, the duty cycle of the bit-plane display times is shortened relative to the frame period to avoid visual artifacts, which can be accompanied by a shortening of the duty time of the illumination on SLM.Abstract:
Methods of controlling the illumination source ( 18 ) of an SLM-based display system ( 10 ). It is assumed that the system ( 10 ) displays pixel data formatted into a bit-plane format so that all bits of the same bit-weight can be displayed simultaneously. To provide greyscale, the amplitude of the source ( 18 ) may be modulated so that bit-planes having greater bit-weights are displayed with more intense illumination than bit-planes having smaller bit-weights (FIGS. 2 and 3 ). To avoid visual artifacts, the duty cycle of the bit-plane display times may be shortened relative to the frame period. (FIG. 4 A). The latter method can be accompanied by a shortening of the duty time of the illumination on SLM ( 15 ). (FIG. 4 B). The short duty cycle method may be used together with illumination amplitude modulation, or it may be used with the PWM method of providing greyscale.read more
Citations
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References
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Patent
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