Projection System Light-Valve Synchronization for Rainbow-Free Imaging
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Solution Overview
Problem
Projection systems using multiple projectors with single light valves often produce a rainbow effect due to monochromatic light beams being generated in a time sequence, especially during video recording.
Innovation Solution
A projection system comprising multiple projection devices with processors and light valves, controlled by a control device to provide light beams of different wavelengths in a synchronized time sequence, preventing the rainbow effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple projectors with single light valves are stacked to increase brightness, then projection brightness is enhanced, but rainbow effect becomes apparent
Solution Approach 1:
The patent combines multiple light valves (first light valve, second light valve, third light valve) into a single integrated projection system. These light valves work cooperatively to generate different color light beams (R, G, B) that are projected simultaneously onto the same target, merging their effects to produce full-color images without the rainbow effect that occurs when separate projectors are stacked.
Solution Approach 2:
The patent implements continuous projection of all color channels simultaneously through multiple light valves operating in parallel. Unlike time-sequential projection where colors are projected one after another, this system maintains continuous projection of R, G, and B light beams at the same time, ensuring uninterrupted full-color display and eliminating the temporal separation that causes rainbow effects.
2Ease of operation
If monochromatic light beams are generated in time sequence for mixing, then light mixing is achieved, but rainbow effect is easily produced
Solution Approach 1:
The patent merges multiple light valves that generate different monochromatic light beams (R, G, B) into a single projection system. These light valves operate simultaneously and their light beams are combined through optical paths to achieve light mixing, eliminating the need for time-sequential projection while maintaining the ease of light mixing function.
Solution Approach 2:
The patent uses periodic modulation of the light beams from multiple light valves to achieve dynamic light mixing effects. The light valves are controlled to emit light in synchronized periodic cycles, allowing continuous mixing of R, G, and B light beams while maintaining simultaneous projection, thus avoiding the rainbow effect caused by time-sequential emission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively prevents the rainbow effect by ensuring light beams of different wavelengths are projected in each time sequence, enhancing image quality.
Implementation Method 1
Each of the processors is connected to one of the light valves. The control device respectively provides a first signal, a second signal, and a third signal to the first processor, the second processor, and the third processor. The first, second, and third processors respectively control the first, second, and third light valves to provide the first, second, and third light beams in turn according to the first, second, and third signals, so as to generate an image beam
Data Source
AI summary
A projection system includes projection devices and a control device. Each projection device is configured to provide first, second, and third light beams of different wavelengths. The projection devices include processors and light valves. The processors include first, second, and third processors. The light valves include first, second, and third light valves. Each of the processors is connected to one of the light valves. The control device respectively provides first, second, and third signals to the first, second, and third processors. The first, second, and third processors respectively control the first, second, and third light valves to provide the first, second, and third light beams in turn according to the first, second, and third signals, so as to generate an image beam; in the same time sequence, the light beams provided by the first, second, and third valves controlled by the first, second, and third processors have different wavelengths.