Beam-Splitter Light Guide for Compact Projection Illumination
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Solution Overview
Problem
The challenge of effectively utilizing light beams emitted from solid-state light sources, such as LEDs and LDs, and optimizing light collection efficiency in projection devices has not been adequately addressed.
Innovation Solution
An illumination system with a light source module and a light guide module, utilizing misaligned light source modules and stripe beam splitters to integrate light beams from different directions, allowing them to converge into a combined light beam, which is then processed through a projection device for efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple light source modules are used to increase light output, then light emission efficiency is improved, but optical path design complexity increases
Solution Approach 1:
The patent combines multiple light beams from different light source modules into a single integrated optical path using beam splitters. The first and second light beams from misaligned light source modules are merged through the first and second beam splitters into a combined light beam, reducing optical path complexity while maintaining high light emission efficiency.
Solution Approach 2:
Beam splitters are introduced as intermediary optical elements to manage the integration of multiple light beams. These beam splitters act as mediators that redirect and combine light paths from different sources, simplifying the overall optical design by providing a systematic method for beam integration.
2Volume of moving object
If light source modules are misaligned to reduce space, then device size is reduced, but light beam integration becomes more difficult
Solution Approach 1:
The patent addresses misaligned light source modules by introducing optical elements that manipulate light in additional dimensions. Beam splitters and reflecting mirrors are positioned at specific angles (e.g., 45 degrees) to redirect light beams from misaligned sources into a common optical path, effectively solving the integration problem through spatial dimensionality changes.
Solution Approach 2:
Optical intermediaries such as beam splitters and reflecting mirrors are positioned between misaligned light source modules to facilitate beam integration. These intermediaries redirect light paths through controlled reflections and transmissions, enabling efficient integration of beams from compact, misaligned sources.
3Loss of energy
If beam splitters are used to integrate light beams, then light efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple beam splitters are strategically arranged to merge light beams from different sources into a single combined beam. This merging approach maximizes light efficiency by ensuring that light from all sources contributes to the final output, while the systematic arrangement of beam splitters manages the added complexity through structured optical path integration.
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 enhances light efficiency and reduces the complexity of optical path design, allowing for a compact projection device with improved light emission efficiency.
Implementation Method 1
The first beam splitter is configured to allow the first light beam to pass through, and to reflect the second light beam to a first direction
Implementation Method 2
The first beam splitter is configured to allow the first light beam to pass through
Implementation Method 3
a reflecting mirror configured to allow the third light beam to pass through, and to reflect the third light beam to the first beam splitter or the second beam splitter
Data Source
AI summary
Provided is an illumination system including a light source module and a light guide module. The light source module includes a first light source module providing a first light beam toward a first direction, and a second light source module and a third light source module providing a second light beam and a third light beam toward a second direction. The light guide module includes a first light splitting element, a second light splitting element, and a reflecting mirror, wherein the second light splitting element is at the downstream of the first light splitting element. The light guide module enables the first light beam, the third light beam, and the second light beam to be transmitted along the second direction. The disclosure also provides a projection device.