Circuit Board Holder Positioning for Wearable Display Interference
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Solution Overview
Problem
In wearable display devices, such as head-mounted displays, there is a challenge in reducing device size while avoiding interference between components like heat dissipation sheets, flexible boards, and cables, which can occur due to their proximity and spatial constraints.
Innovation Solution
The optical device incorporates a circuit board holder that positions the end of the circuit board to protrude towards the harness, creating a separated space to prevent interference and allow for efficient heat dissipation and reduced device size, using a board holder and partition plates or clips to segregate the flexible board and harness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device size is reduced, then the compactness is improved, but interference between components (heat dissipation sheet, flexible board, and cable) occurs
Solution Approach 1:
The patent divides the internal space into distinct regions using a partition plate. The partition plate segments the housing interior to create separate zones: one for the flexible board and another for the cable assembly. This spatial segmentation prevents interference between components while maintaining a compact overall device size, directly resolving the contradiction between miniaturization and component compatibility.
2Volume of moving object
If components are positioned closer together, then the device size is reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The partition plate creates thermally isolated zones that allow heat-generating components to be positioned close to the housing exterior for compactness, while maintaining adequate thermal pathways. The segmentation enables independent thermal management for each component zone, preventing heat accumulation despite reduced device dimensions.
3Reliability
If the circuit board is positioned to avoid interference with the harness, then component compatibility is improved, but the device complexity increases
Solution Approach 1:
The partition plate provides a simple yet effective spatial division that guides the arrangement of the circuit board and harness into non-interfering zones. This single partitioning element establishes clear component placement rules without requiring complex mounting structures or multiple supporting components, thus improving component compatibility while adding minimal structural complexity.
Data Source
AI summary
The present disclosure includes a display element configured to emit imaging light, a main circuit board and the like being a circuit board configured to process a video signal, a board holder being a circuit board holder configured to fix the main circuit board and the like, and a harness coupled to the main circuit board, and the board holder fixes an end portion of the main circuit board in a state where the end portion protrudes to an optical path upstream of the display element. As a result, a space for avoiding interference is provided on the optical path upstream of the display element, namely, on a back surface side of the display element, while suppressing an increase in size of the device toward a lateral side and the like.