Input Device Light Guide Rigid Substrate Assembly
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Solution Overview
Problem
Existing input devices face challenges in assembling and cost-effectiveness when using flexible substrates for light emitting sections, which affect the stability and ease of detecting light emitting sections by cameras.
Innovation Solution
The input device employs a rigid substrate with light sources mounted on one surface and light guide members to direct light to multiple light emitting sections on its outer surface, facilitating assembly and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a flexible substrate is used to mount light sources for light emitting sections, then the positioning freedom and detection stability are improved, but the assembling complexity and cost increase
Solution Approach 1:
A light guide member is introduced as an intermediary component between the rigid substrate and the housing outer surface. The light guide member receives light from sources mounted on the rigid substrate and guides it to the light emitting sections on the housing, enabling the use of rigid substrates while maintaining detection stability.
Solution Approach 2:
The light guide member creates an optical copy or projection of the light source positions to the housing surface. This allows the detection system to accurately track light emitting sections even though the physical light sources are mounted on a rigid substrate rather than directly on the housing.
2Measurement precision
If a flexible substrate is used to mount light sources for light emitting sections, then the positioning freedom and detection stability are improved, but the manufacturing cost increases
Solution Approach 1:
The light guide member is designed as a simple, inexpensive optical component that can be easily manufactured and replaced. This allows the system to use cost-effective rigid substrates and standard LED components while maintaining detection accuracy through the light guide's optical path design.
Solution Approach 2:
The invention changes the physical state or form of light transmission by using a light guide member with specific optical properties. The light guide member transforms the light path from direct mounting to guided transmission, enabling cost-effective rigid substrate implementation while preserving detection stability.
3Ease of manufacture
If a rigid substrate is used instead of a flexible substrate, then the assembling ease and cost are improved, but the positioning freedom and detection stability may be compromised
Solution Approach 1:
The light guide member serves as a mediator that bridges the rigid substrate and the housing surface. It receives light from fixed positions on the rigid substrate and directs it to precisely positioned light emitting sections on the housing, maintaining detection stability despite the rigidity of the substrate.
Solution Approach 2:
The light guide member extends the light path in a third dimension, allowing light to travel from the rigid substrate through the light guide to the housing surface. This spatial separation enables independent optimization of substrate rigidity and light emitting section positioning.
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 enhances the stability and ease of detecting light emitting sections, improving the overall assembly process and reducing costs compared to using flexible substrates.
Implementation Method 1
a first light guide member that guides light from the at least one light source to positions of the plurality of light emitting sections on the outer surface of the housing
Data Source
AI summary
An input device includes a tracking target section having an outer surface on which a plurality of light emitting sections are provided; a housing constituting the outer surface of the tracking target section; a first substrate which is a rigid substrate disposed inside the housing; at least one light source mounted on a first surface of the first substrate; and a first light guide member that guides light from the at least one light source to positions of the plurality of light emitting sections on the outer surface of the housing.