Overlapping Waveform Utilization in Projection Systems
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Solution Overview
Problem
Conventional field sequential projection systems with multiple single color light sources experience dead times between output waveforms due to gradual rise and fall times, leading to a loss of lumens in projected images.
Innovation Solution
The implementation of overlapping output waveforms generated by sequentially energizing and de-energizing multiple single color light sources, allowing their rising and declining portions to overlap, thereby reducing or eliminating dead times and enhancing image projection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple single color light sources are sequentially energized and de-energized with nonoverlapping time periods, then each light source can be fully controlled for its color output, but dead times occur between waveforms resulting in loss of lumens
Solution Approach 1:
The patent applies preliminary action by overlapping the waveform transitions of multiple single color light sources. Specifically, the rising edge of one light source's waveform is timed to overlap with the falling edge of the previous light source's waveform, ensuring continuous light output and eliminating dead times between sequential operations. This preliminary timing adjustment prevents lumens loss while maintaining color control.
Solution Approach 2:
The patent implements continuity of useful action by designing overlapping waveforms that eliminate dead times between light source transitions. The overlapping portions of adjacent waveforms ensure that at least one light source is always active, maintaining continuous light output and preventing interruptions in the projection system's useful action.
2Stability of the object's composition
If single color light sources have gradual rise and fall times, then the light output is smooth and stable, but dead times occur between waveforms reducing projection efficiency
Solution Approach 1:
The patent applies preliminary action by pre-timing the overlapping of waveform transitions. The rising edge of each subsequent light source is scheduled to overlap with the falling edge of the previous light source before the previous source fully transitions down. This preliminary timing arrangement maintains smooth light output while preventing dead times that would reduce projection efficiency.
Solution Approach 2:
The patent implements dynamics by adjusting the timing relationships between multiple light sources dynamically. The overlapping waveform technique allows the system to adapt the transition timing of each light source relative to others, creating a dynamic coordination that maintains stability while improving overall projection efficiency through eliminated dead times.
3Device complexity
If dead times exist between output waveforms, then sequential control of light sources is simple, but continuous light output is interrupted leading to image quality loss
Solution Approach 1:
The patent applies preliminary action by pre-planning the overlapping timing of light source waveforms. By scheduling the rising edge of each light source to overlap with the falling edge of the previous source, the system maintains simple sequential control logic while ensuring continuous light output and preventing image brightness interruptions.
Data Source
Figure 1A~1B
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AI summary
Projection systems and processes for generating and utilizing overlapping waveforms are disclosed herein. The overlapping waveforms may be output waveforms generated by a plurality of single color light sources.