Gray scale drive sequences for pulse width modulated displays
Methods, apparatus, and systems for generating drive sequences for pulse width modulated displays are described. A pulse width modulated signal that includes a drive sequence of temporal segments that are activated and deactivated to produce a desired gray scale. The temporal segments can be non-binary, non-equally weighted. The drive sequence can also include at least two of the temporal segments are least significant bit segments and the other segments are higher order segments.
1. A projection display system comprising:
an illumination source with optics to direct that illumination to a liquid crystal display component;
projection optics to direct light from a liquid crystal display component to a display screen; and
a liquid crystal display component system comprising a liquid crystal display component and display controller;
wherein the display component is modulated by data from the display controller;
wherein the data comprises a pulse set of non-binary, non-equal, weighted temporal segments based on the image data, assembled into a sequence;
wherein selected segments are activated in accordance with a desired brightness level of pixels within the display; and
wherein the sequence includes at least two least significant bit segments.
2. The system of claim 1 , wherein the at least two least significant bit segments are not adjacent to each other.
3. The system of claim 1 , wherein the temporal activation of the segments is discontinuous.
4. The system of claim 1 , wherein the sequence comprises non-contiguous time slots.
5. The system of claim 1 , wherein the display component comprises liquid crystal on silicon elements.
6. The system of claim 1 , wherein the image data comprises a gray scale command.
7. The system of claim 1 , wherein the image data comprises multiple color of image data.
8. The system of claim 1 , wherein the at least two least significant bit segments comprise a first least significant bit sequence and a second least significant bit sequence.
9. The system of claim 8 , wherein the first least significant bit sequence is of substantially identical temporal weighting to the second least significant bit sequence.
10. The system of claim 8 , wherein the first least significant bit sequence differs in temporal weighting from the second least significant bit sequence.