Two-Color Light Guiding Member for Gap-Free Luminance Control
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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 apparatuses, leading to inefficient light emission.
Innovation Solution
The light guiding and shielding sections 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
1Ease of manufacture
If light guiding members and light shielding members are manufactured separately with standard tolerances, then manufacturing cost and ease of assembly are improved, but gap instability occurs leading to luminance variation
Solution Approach 1:
The light guiding member and light shielding member are integrated into a single molded part through two-color molding technology. This merging eliminates the gap between the two components entirely, resolving the gap stability issue while maintaining manufacturing efficiency through a single molding process.
Solution Approach 2:
Two-color molding is employed to create a composite structure where the light guiding section and light shielding section are formed from different materials with distinct optical properties. The light guiding section uses a translucent or transparent material to transmit light, while the light shielding section uses an opaque material to block light, achieving both functional differentiation and gap elimination.
2Reliability
If the gap between light guiding members and light shielding members is reduced to improve luminance stability, then luminance stability is improved, but manufacturing precision requirements increase and cost increases
Solution Approach 1:
By integrating the light guiding member and light shielding member into one molded part, the gap is completely eliminated. This merging approach achieves perfect luminance stability without imposing stringent gap control precision requirements, as there is no gap to control.
Solution Approach 2:
The two-color molding process acts as an intermediary mechanism that seamlessly joins the light guiding section and light shielding section. The molding process itself creates the transition between the two functional zones, eliminating the need for separate assembly and gap control.
3Device complexity
If separate light guiding members and light shielding members are used, then device complexity is reduced and assembly is simplified, but light leakage occurs and luminance control is affected
Solution Approach 1:
The integration of light guiding and light shielding functions into a single molded part eliminates light leakage paths that would exist between separate components. The merged structure ensures continuous optical control without gaps, while the overall device complexity remains manageable due to the simplicity of the single-part design.
Solution Approach 2:
The use of composite materials with different optical properties in the two-color molding allows the light shielding section to effectively block light while the light guiding section transmits light. This material differentiation prevents light leakage without requiring complex additional light shielding structures.
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
Figure 1A~1B
Figure 2
Figure 3
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.