HMD Flexible Wiring Shield Wall for Crosstalk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Head-mounted-type display devices face issues with noise interference due to flexible wiring members easily deforming and coming into contact with each other, exacerbated by size and weight reduction, lacking sufficient measures to prevent such noise.
Innovation Solution
Incorporation of a first and second flexible wiring member accommodated within a resin-molded accommodating member, separated by a resin-molded separation wall with a shield electrode pattern formed by Molded Interconnect Device (MID) to reduce noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible wiring members are used to connect display elements and control circuits in head-mounted display devices, then ease of installation and adaptability are improved, but noise interference and crosstalk increase due to deformation and contact between wirings
Solution Approach 1:
The internal space of the housing is divided into multiple accommodation spaces by a partition wall, with each space dedicated to holding specific flexible wiring members. This segmentation prevents the wirings from contacting each other and reduces crosstalk while maintaining the adaptability of using flexible wiring members for connection.
Solution Approach 2:
A partition wall acts as an intermediary structure between adjacent flexible wiring members, physically separating them to prevent direct contact and noise interference. The partition wall serves as a mediator that allows both wirings to coexist in the confined space without interfering with each other.
2Weight of moving object
If size and weight of head-mounted display devices are reduced, then wearability and comfort are improved, but noise interference between wiring members increases due to closer proximity
Solution Approach 1:
By segmenting the internal space into separate accommodation spaces for different wiring members, the partition wall ensures that even in a compact, lightweight device, the wiring members remain physically separated. This prevents noise interference despite the reduced size and weight of the overall device.
Solution Approach 2:
The partition wall utilizes the vertical dimension (thickness direction of the housing) to create separation between wiring members that are arranged in planar directions. This three-dimensional space utilization allows effective noise prevention without increasing the overall footprint or weight of the device.
3Adaptability or versatility
If multiple wirings and external terminals are disposed inside the device housing, then functionality and connectivity are improved, but the risk of noise interference and crosstalk increases
Solution Approach 1:
The housing interior is segmented into multiple dedicated accommodation spaces, each housing specific wiring members or terminals. This segmentation isolates signal paths, preventing crosstalk and maintaining signal integrity while supporting multiple functional connections and terminals within the device.
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
Stable image quality is maintained by curbing noise (crosstalk) and adhering to EMI standards, while enabling further size reduction of the device.
Implementation Method 1
a shield electrode pattern formed by an MID on a surface of the separation wall
Data Source
AI summary
In order to provide an electronic device capable of reducing noise, an electronic device such as an HMD includes: a first flexible wiring member; a second flexible wiring member; an accommodating member that accommodates the first flexible wiring member and the second flexible wiring member inside the accommodating member and is molded by a resin; a separation wall that is disposed between the first flexible wiring member and the second flexible wiring member and is molded integrally with the accommodating member; and a shield electrode pattern that is formed by an MID on a surface of the separation wall.