Illumination Apparatus Light Transmitting Member Segmentation
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Solution Overview
Problem
Existing illumination apparatuses using fiber light sources with wavelength converting members suffer from inefficient light usage due to scattering and absorption of wavelength-converted light, leading to reduced light output.
Innovation Solution
An illumination apparatus design featuring a light source unit, an optical unit with a light converting member, a light transmitting member, and a reducing portion that optimizes light transmission and emission by reflecting and diffusing primary and secondary light, ensuring even distribution and reduced density of illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the wavelength converting member covers the whole portion emission side opening portion of the spacer, then light emission completeness is improved, but light usage efficiency deteriorates due to scattering and absorption
Solution Approach 1:
The invention divides the light transmission path into two distinct channels: a through-hole portion for primary light transmission and a circumferential region for secondary light extraction. This segmentation allows primary light to pass through to the target while secondary light is extracted and utilized separately, preventing the loss of useful light energy through unwanted scattering and absorption.
Solution Approach 2:
The light transmitting member acts as an intermediary structure that facilitates the separation and directional control of primary and secondary light. By providing a structured path with through-holes and circumferential regions, it mediates between the light source and the target, ensuring efficient light utilization without the harmful scattering effects.
2Productivity
If the wavelength converting member is positioned close to the light guide member, then light conversion efficiency is improved, but light distribution uniformity deteriorates
Solution Approach 1:
The invention transitions from a one-dimensional linear arrangement to a two-dimensional spatial configuration by introducing a light transmitting member with vertical through-holes and horizontal circumferential regions. This dimensional change allows simultaneous optimization of light conversion efficiency and distribution uniformity by providing multiple light extraction paths in different spatial directions.
Solution Approach 2:
Different regions of the light transmitting member are assigned different functions: the through-hole portions optimize for primary light transmission and conversion efficiency, while the circumferential regions optimize for secondary light extraction and distribution uniformity. This local differentiation of functional qualities resolves the contradiction between conversion efficiency and distribution uniformity.
3Loss of energy
If a reflecting portion is added to reflect rearward emission light, then light usage efficiency is improved, but device complexity increases
Solution Approach 1:
The reflecting portion is merged with the light transmitting member structure, forming an integrated component rather than a separate element. The circumferential surface of the light transmitting member itself serves as the reflecting surface, combining the functions of light transmission, reflection, and structural support into a single unified component, thereby improving light usage efficiency without significantly increasing device complexity.
4Strength
If the light transmitting member is made fully continuous, then structural integrity is improved, but light transmission efficiency deteriorates
Solution Approach 1:
The light transmitting member employs a porous or hollow cylindrical structure with through-holes along its length. This porous configuration maintains sufficient structural integrity while creating direct light transmission pathways that eliminate light loss through the material bulk, thereby simultaneously achieving structural strength and high light transmission efficiency.
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 apparatus achieves enhanced light usage efficiency by diffusing primary light and utilizing both primary and secondary light effectively as illumination, preventing color shading and improving the degree of freedom in design while maintaining high transmissivity.
Implementation Method 1
a light converting member which is provided apart from the primary light entrance portion, the light converting member converting the optical characteristics of the primary light entering from the primary light entrance portion when the primary light is applied to the light converting member, the light converting member generating secondary light different from the primary light
Implementation Method 2
a reflecting portion which is provided on a circumferential surface of the light transmitting member including the light converting member and which reflects the primary light and the secondary light
Data Source
AI summary
An illumination apparatus includes a light source unit which emits primary light, and an optical unit which functions when the primary light emitted from the light source unit is applied to the optical unit. The optical unit includes a reducing portion which is directly provided in a illumination light emitting portion or provided frontward to part of the illumination light emitting portion and which reduces the density of the primary light as the illumination light emitted from the illumination light emitting portion.