Lighting Device Parallel Light Beam Splitting for Uniform Illumination
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Solution Overview
Problem
Existing lighting devices for stereo displays face challenges in uniformly illuminating large surfaces with a small number of light sources, leading to reduced illuminance and increased space requirements, while using multiple light sources increases costs and degrades image quality due to beam interference.
Innovation Solution
A lighting device comprising a light source, a first optical element to convert light into parallel light, and multiple second optical elements arranged in a specific direction to guide light in intersecting directions, allowing for uniform illumination of a large surface with a small number of light sources, minimizing interference and optical loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single light source is used to illuminate the entire irradiation surface, then the number of light sources is reduced, but the distance from the light source to the irradiation surface must be increased, which reduces illuminance and increases space requirements
Solution Approach 1:
The patent divides the single light path into multiple segments using beam splitting elements. The light from a single source is segmented into multiple beams that are directed to different regions of the irradiation surface, enabling wide-area illumination while maintaining high illuminance and keeping the light source close to the surface.
Solution Approach 2:
The patent uses optical elements to redirect light in multiple directions (dimensions), transforming the single-direction light propagation into multi-directional illumination. This allows the light to cover a large surface area without increasing the distance from the light source or reducing illuminance.
2Illumination intensity
If multiple light sources are used to illuminate the entire irradiation surface, then illuminance is improved, but the cost increases and beam interference deteriorates image quality
Solution Approach 1:
The patent extracts the harmful interference component by using a single light source instead of multiple sources, thereby eliminating beam interference between independent light sources while maintaining high illuminance through optical beam splitting and directional control.
3Illumination intensity
If multiple light sources are used to illuminate the entire irradiation surface, then illuminance is improved, but the cost increases
Solution Approach 1:
The patent combines the functions of multiple light sources into a single light source by using beam splitting optical elements. This merging approach achieves the same illumination effect as multiple sources while reducing the number of actual light sources, thereby lowering cost.
4Area of stationary object
If the distance from the light source to the irradiation surface is increased, then the entire surface can be illuminated, but the illuminance is reduced and space requirements increase
Solution Approach 1:
The patent uses optical elements to redirect light in multiple directions, allowing the light to cover a large surface area without increasing the distance from the light source. This maintains high illuminance while achieving wide-area illumination through spatial redistribution of light paths.
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 efficient, uniform illumination of large surfaces with reduced beam interference and optical loss, maintaining high image quality while minimizing the number of light sources and space requirements.
Implementation Method 1
a first optical element configured to convert light emitted from the light source into substantially parallel light
Implementation Method 2
Each of the plurality of second optical elements guides at least a portion of the substantially parallel light incident on the light incident surface in a second direction intersecting the first direction
Data Source
AI summary
A lighting device that includes a light source, a first optical element configured to convert light emitted from the light source into substantially parallel light, and a plurality of second optical elements arranged in a first direction. Each of the plurality of second optical elements has a light incident surface. Each of the plurality of second optical elements guides at least a portion of the substantially parallel light incident on the light incident surface in a second direction intersecting the first direction and guides another portion in the first direction.