Aspheric Reflecting Surface Light Source Unit for Compact High Luminance
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Solution Overview
Problem
Existing light source systems face challenges in achieving high luminance while maintaining a compact size, as increasing the number of light sources complicates the optical system and limits flexibility in arrangement and shape.
Innovation Solution
A light source unit comprising at least two reflecting surfaces, including an aspheric reflecting surface and a planar reflecting surface, which are supported by a common unit and can be adjusted, allowing for efficient collection and reflection of light to a point on a light emitter, such as a phosphor layer, with the option of using laser sources in a planar array and rotational symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light sources is increased to attain high luminance, then the luminance is improved, but the apparatus size increases and the configuration becomes complicated
Solution Approach 1:
Multiple light sources are merged into a single integrated optical system where they share common optical components including the aspheric lens and reflecting sections. This allows high luminance to be achieved through combined light output while maintaining a compact apparatus size by eliminating redundant components for each individual light source.
Solution Approach 2:
The optical components, particularly the aspheric lens and reflecting sections, serve multiple functions simultaneously: they collect light from multiple different light sources, focus the combined light onto the phosphor layer, and enable flexible arrangement of light sources in various directions. This multi-functionality reduces the overall apparatus size while maintaining high luminance capability.
2Illumination intensity
If the number of light sources is increased to attain high luminance, then the luminance is improved, but the device complexity increases
Solution Approach 1:
The optical paths from multiple light sources are merged into a single collection and focusing system. The aspheric lens and reflecting sections form an integrated optical train that handles light from all sources uniformly, simplifying the overall system architecture compared to having separate optical systems for each light source.
Solution Approach 2:
The aspheric lens and reflecting sections serve as universal optical components that can handle light from multiple different light sources with different optical-axis directions. This multi-functional design reduces the number of specialized components needed, thereby reducing device complexity while enabling high luminance output.
3Adaptability or versatility
If conventional optical components are used, then the optical path is limited, but the flexibility in arranging and shaping the optical system is reduced
Solution Approach 1:
An aspheric lens is employed instead of conventional spherical lenses to achieve superior light collection from multiple light sources with different optical-axis directions. The aspheric surface geometry provides enhanced flexibility in controlling light paths and achieving desired optical performance while accommodating various light source arrangements, thereby improving adaptability without significantly increasing complexity.
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 configuration enables high luminance while preventing the apparatus from growing in size, allowing for flexible arrangement and shape adjustments, thus achieving necessary luminance and shape requirements effectively.
Implementation Method 1
at least two reflecting surfaces configured to reflect a first light and/or collect the first light to a point on a light emitter. At least one of the at least two reflecting surfaces is an aspheric reflecting surface.
Implementation Method 2
the light emitter converts at least a portion of the first light into a second light with a wavelength shorter than a wavelength of the first light
Data Source
AI summary
A light source unit, light source apparatus (100) and an image display device (800), each including at least two reflecting surfaces (35, 37) configured to reflect a first light and/or collect the first light to a point on a light emitter, at least one (35) of the at least two reflecting surfaces (35, 37) is an aspheric reflecting surface.