Two-Color Molded Light Guide Structure for Stable Luminance
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Solution Overview
Problem
The instability of the gap between light guiding members and light shielding members due to manufacturing tolerances affects the luminance of light emitting regions in electronic devices, leading to inefficient light emission.
Innovation Solution
The light guiding section and light shielding section are formed by two-color molding, with the inner peripheral edges of openings in the shielding section in contact with the light receiving or output sections of the guiding section, ensuring no gaps and stable luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light guiding members and light shielding members are manufactured separately with standard tolerances, then manufacturing cost and complexity are reduced, but the gap between members becomes unstable leading to luminance variation
Solution Approach 1:
The light guiding member and light shielding member are merged into a single integrated component manufactured through two-color molding. This combines two previously separate parts into one, eliminating the gap between them while maintaining manufacturing efficiency through a specialized molding process that injects different colored materials in sequence.
Solution Approach 2:
The patent employs two-color molding to create a composite structure where different materials (represented by different colors) are molded together in a single process. This allows the light guiding section and light shielding section to be formed as one piece with stable optical properties and precise geometric relationships.
2Loss of energy
If the gap between light guiding members and light shielding members is reduced to eliminate light leakage, then light emission efficiency is improved, but manufacturing tolerances cause instability in the gap size
Solution Approach 1:
By merging the light guiding member and light shielding member into a single integrated component, the patent completely eliminates the gap between these elements. This prevents light leakage while avoiding the manufacturing precision issues that would arise from trying to control and maintain a specific gap size through separate component assembly.
3Ease of manufacture
If separate light guiding members and light shielding members are used, then ease of manufacture is improved, but light emission efficiency decreases due to gap losses
Solution Approach 1:
The patent merges the light guiding member and light shielding member into one integrated component manufactured through two-color molding. While this requires a more specialized molding process, it eliminates the need for separate assembly operations and achieves superior light emission efficiency by completely eliminating gaps between components.
Solution Approach 2:
The patent replaces the mechanical assembly system (separate parts joined together) with an integrated molded structure. This substitution eliminates the need for mechanical fastening or positioning mechanisms, achieving both manufacturing efficiency and optimal optical performance through a single molded piece.
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 structure stabilizes the luminance of light emitting regions by efficiently guiding light from the source to the output section, preventing light leakage and reducing manufacturing tolerances.
Implementation Method 1
a light transmitting section extending from the light receiving section toward the light output section
Implementation Method 2
light from the light source can be guided efficiently from the light receiving section to the light output section
Data Source
AI summary
Provided is an electronic apparatus including a light source, a light emitting section that emits light from the light source to outside of the electronic apparatus, and a light guiding member including a light guiding section and a light shielding section formed by two-color molding. The light guiding section has a light receiving section that receives the light from the light source, a light output section that outputs the light toward the light emitting section, and a light transmitting section extending from the light receiving section toward the light output section, the light shielding section has a first opening, an inner peripheral edge of the first opening is in contact with a first section that is one of the light receiving section and the light output section, and the light transmitting section has an exterior surface.