Light Guide Member Recesses Prevent Color Mixing
Solution Overview
Problem
Existing light emitting apparatuses fail to irradiate light of different colors selectively based on the location of the light guide member, leading to potential color mixing within the device.
Innovation Solution
A light emitting apparatus with a light guide member that includes recesses and extension parts to guide light from multiple light sources of different colors, minimizing the mixing of light by using a cutout portion and recesses to direct light output from specific surfaces, ensuring distinct color emission at predetermined locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light guide member is used to guide light from multiple light sources, then the device structure is simplified, but light of different colors mixes within the light guide member
Solution Approach 1:
The light guide member is divided into multiple independent light guide portions (first light guide portion and second light guide portion), each responsible for guiding light from specific light sources. This segmentation prevents light from different color sources from mixing while maintaining a relatively simple overall structure.
Solution Approach 2:
Different regions of the light guide member are designed with different properties - the first light guide portion guides light from first and second light sources, while the second light guide portion guides light from third and fourth light sources. Each portion has optimized optical characteristics for its specific function, preventing color mixing while maintaining structural simplicity.
2Object-generated harmful factors
If light guide portions are separated to prevent color mixing, then light color separation is improved, but the device structure becomes more complex
Solution Approach 1:
Multiple light guide portions are integrated into a single light guide member through the fourth surface, which serves as a common interface for all light sources. This merging approach achieves color separation functionality while avoiding the complexity of completely separate light guide components.
Solution Approach 2:
The first and second light guide portions are arranged adjacent to each other within the light guide member, with the fourth surface serving as a shared boundary. This nested arrangement allows multiple light guiding functions to coexist in a compact structure without requiring separate external components.
3Productivity
If the fourth surface is made transparent to allow light passage, then light output efficiency is improved, but light from adjacent portions may leak into each other
Solution Approach 1:
The fourth surface is designed with spatially varying properties - it is transparent in regions corresponding to the first and second light guide portions to allow efficient light output, while being light-shielding in regions corresponding to the third and fourth light sources to prevent unwanted light leakage. This local differentiation resolves the contradiction between transparency and light isolation.
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 effectively outputs specific colors of light without mixing, allowing for customizable lighting based on environmental or user demands by using a light guide member with recesses and extension parts to direct light from multiple light sources.
Implementation Method 1
a plurality of extension parts that mainly guide the light input through the input surfaces from the corresponding light source parts respectively
Implementation Method 2
having a recess side surface that reflects at least some of the light input through the input surfaces
Data Source
AI summary
A light emitting apparatus in which light of different colors can be irradiated depending on the locations of a light guide member used in the light emitting apparatus and in accordance with the environment of a facility or a user's demand, a light source member includes a plurality of light source members each with one or more light sources, and adjacent light source parts emitting light of different colors with each other. The light guide member includes a recess which is formed between the respective input surfaces through which the light from the corresponding light source parts is input and which has a recess side surface that reflects at least some of the light input through the input surfaces; a plurality of extension parts that respectively guide mainly the light input from the corresponding light source parts through the input surfaces; and a cutout portion formed between the extension parts.