Illuminating Optical Device for Projector Luminance and Color Reproducibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-color reproducibility mode, the maximum brightness of each color light is limited, resulting in significantly lowered luminance of the projected image, making it difficult for users to see, and existing technologies face a trade-off between luminance and color reproducibility, unable to achieve both high-luminance and high-color reproducibility simultaneously.
Innovation Solution
An illuminating optical device with multiple light source units, a color wheel with transmissive regions for different colors, and a controller that selects lighting patterns to optimize light usage, allowing for varying combinations of colors to be transmitted through the color wheel, enhancing luminance while maintaining color reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the maximum brightness of each color light is limited to enhance color reproducibility, then color reproducibility is improved, but luminance of the projected image is significantly lowered
Solution Approach 1:
The illuminating optical device segments the light source into multiple light source units (first light source emitting red and green light, second light source emitting blue light) rather than using a single white light source. This segmentation allows independent control of each color channel, enabling the system to optimize color reproducibility for each color while maintaining high luminance through combined output from multiple sources.
Solution Approach 2:
The system dynamically switches between different lighting patterns stored in the storage device. The controller selects from multiple lighting pattern information sets, each representing different combinations and timing of light source activation. This dynamic switching enables the system to adapt between high color reproducibility mode (with limited maximum brightness per color) and high luminance mode (with increased brightness), resolving the contradiction by making the system's characteristics可调 rather than fixed.
2Illumination intensity
If multiple light sources are increased to enhance luminance of the projected image, then brightness is improved, but power consumption is increased
Solution Approach 1:
The patent combines multiple light source units with different emission characteristics (red-green from first light source, blue from second light source) to create a unified illuminating system. By merging these specialized light sources and coordinating them through the color wheel and control system, the device achieves high luminance output equivalent to or exceeding single white light sources, while the total power consumption is managed through efficient optical design and selective activation patterns stored in the storage device.
3Loss of energy
If additional transmissive regions are provided for colors other than RGB to raise usage efficiency of light, then light usage efficiency is improved, but device complexity is increased
Solution Approach 1:
Instead of physically modifying the color wheel to add more transmissive regions (which would increase complexity), the system changes the operational parameters by using multiple light source units with specific emission spectra. The first light source emits red and green light, and the second emits blue light, allowing the existing RGB color wheel to operate more efficiently by receiving light that better matches its transmissive regions. This parameter change approach improves light usage efficiency without adding physical complexity to the color wheel structure.
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
This solution reduces luminance loss in high-color reproducibility mode, enabling improved color reproducibility without compromising maximum brightness, allowing for high-luminance and high-color reproducibility displays simultaneously.
Implementation Method 1
a color wheel that includes a plurality of transmissive regions that each transmit a different color of light
Implementation Method 2
a plurality of light source units that emit different colors of light
Data Source
AI summary
Provided is an illuminating optical device that can reduce lowering of luminance in a display mode for enhancing color reproducibility. A multiple number of light source units (11, 19, 20) each emit a different color of light. Color wheel (28) includes multiple transmissive regions that each transmit a different color of light and that moves the point on which the incident light from each light source unit falls, over the transmissive regions as the wheel rotates. A storage (50) stores a multiple number of lighting pattern information items each item providing a lighting pattern to turn on each light source unit in a different period of lighting. A controller (60) receives a select signal for selecting one of the multiple lighting patterns to turn on each light source unit in accordance with the lighting pattern information that provides the lighting pattern selected by the select signal.