Display system for higher grayscale with a varying light source
First Claim
Patent Images
1. A display system comprising at least one Spatial Light Modulator (SLM) and at least one variable light source and at least one control unit controlling said SLM and said light source wherein:
- 1) said control unit applies multiple-bits image data to control a plurality of micromirrors of the SLM to modulate an illumination light wherein a least significant bit (LSB) of the multiple-bits image data defining a minimum controllable time period for each of the micromirrors of the SLM during a display frame period represented by the multiple-bits image data;
2) said control unit controls the micromirror to operate at least twice in the display frame period; and
3) said control unit also simultaneously controls said light source to project different light intensities of the illumination light to the SLM during said minimum controllable time periods to increase a controllable gray scale of the display system without reducing a significant amount of image brightness.
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Abstract
The present invention provides a projection apparatus that includes:
- at least one spatial light modulator (SLM) and at least one variable light source and at least one control unit controlling said SLM and/or said light source and said SLM has a minimum controllable time period and said control unit controls said SLM providing said minimum controllable time periods of the modulation of said SLM at least twice in a frame period and said control unit controls said light source during said minimum controllable time periods.
8 Citations
14 Claims
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1. A display system comprising at least one Spatial Light Modulator (SLM) and at least one variable light source and at least one control unit controlling said SLM and said light source wherein:
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1) said control unit applies multiple-bits image data to control a plurality of micromirrors of the SLM to modulate an illumination light wherein a least significant bit (LSB) of the multiple-bits image data defining a minimum controllable time period for each of the micromirrors of the SLM during a display frame period represented by the multiple-bits image data; 2) said control unit controls the micromirror to operate at least twice in the display frame period; and 3) said control unit also simultaneously controls said light source to project different light intensities of the illumination light to the SLM during said minimum controllable time periods to increase a controllable gray scale of the display system without reducing a significant amount of image brightness. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display system comprising at least one Spatial Light Modulator (SLM) and at least one variable light source for projecting an illumination light to the SLM, and at least one control unit controlling said SLM and said light source wherein:
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1) said control unit controls said SLM by applying multiple-bits image data wherein each bit of the multiple-bits image data defining a controllable modulation period wherein the control unit applies at least twice a designated bit of the image data to operate the SLM to modulate the illumination light during two designated controllable modulation periods in a frame period represented by the multiple-bits image data; and 2) said control unit simultaneously controls said light source during said two designated controllable modulation periods to project the illumination light with different light characteristics to said SLM. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification