Optical Path Combiner for High-Efficiency Light Source Integration
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Solution Overview
Problem
Current projector technologies face challenges in achieving high resolution and brightness, particularly with the transition to larger screens and higher resolutions like 4K and 8K, where existing methods for increasing brightness are inefficient.
Innovation Solution
A light guide optical device that combines light from multiple sources using an optical path combiner with reflection and transmission surfaces, reducing light loss by forming conjugate images of the light sources and minimizing the effective region, allowing for high-efficiency light combination and miniaturization of the light source device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources are combined using conventional optical methods, then brightness is improved, but light loss increases and device size increases
Solution Approach 1:
The optical path combiner is divided into multiple functional regions: a first reflection region for receiving light from a first direction, a second reflection region for receiving light from a second direction, and a transmission region for transmitting light from a third direction. This segmentation allows each region to independently combine light from different sources with minimal interference, reducing overall light loss while maintaining high brightness output.
2Illumination intensity
If conventional optical combining methods are used, then brightness is improved, but device complexity and size increase
Solution Approach 1:
Multiple light paths from different directions are merged into a single combined light path within the optical path combiner. The first reflection region, second reflection region, and transmission region work together to integrate light from multiple sources into one unified output, simplifying the overall optical system architecture while achieving high brightness without requiring separate combining components for each light source.
3Illumination intensity
If conventional optical combining methods are used, then brightness is improved, but light loss increases
Solution Approach 1:
Different regions of the optical path combiner are assigned specific optical functions tailored to their local requirements. The first reflection region is optimized for reflecting light from the first direction, the second reflection region for the second direction, and the transmission region for transmitting light from the third direction. This local optimization minimizes light loss in each region while contributing to overall high brightness output.
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 solution enables high-efficiency light combination and miniaturization of the light source device, addressing the need for increased brightness and resolution in projectors by reducing light loss and optimizing the layout of light sources.
Implementation Method 1
a first deflector to deflect first light incident from a first direction to an emission direction
Implementation Method 2
a second deflector to deflect second light incident from a second direction different from the first direction, to the emission direction
Implementation Method 3
a transmission portion between the first deflector and the second deflector, the transmission portion to transmit third light incident from a third direction different from each of the first direction and the second direction, to the emission direction
Data Source
AI summary
A light guide optical device includes an optical path combiner including: a first deflector to deflect first light incident from a first direction to an emission direction; a second deflector to deflect second light incident from a second direction different from the first direction, to the emission direction; and a transmission portion between the first deflector and the second deflector, the transmission portion to transmit third light incident from a third direction different from each of the first direction and the second direction, to the emission direction. The optical path combining unit combines the first light, the second light, and the third light, and emits the combined light to the mission direction.