Flexible Substrate Contact Avoidance in Portable Radiographic Imaging
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Solution Overview
Problem
Portable radiographic imaging devices with flexible substrates face image quality deterioration due to vibrations causing noise from contact with nearby components, as existing methods to restrict deformation lead to tension and poor connections.
Innovation Solution
A portable radiographic imaging device design featuring a flexible substrate with a flexed portion connecting the radiation detection panel and signal processing substrate, and a contact avoidance portion on the casing, holding base, or signal processing substrate to prevent contact with peripheral components, allowing for absorption of relative displacement without restricting deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the central portion of the flexible circuit substrate is fixed with a screw to restrict deformation, then contact between the flexible substrate and peripheral components is reduced, but tension acts on connection portions causing poor connection and noise generation
Solution Approach 1:
The patent extracts the harmful constraint (screw fixation) from the flexible substrate and replaces it with a contact avoidance structure. The flexible substrate is allowed to deform freely by removing the fixing screw, while a protrusion on the base stand creates physical clearance to prevent contact with peripheral components, thus eliminating both the tension problem and the contact noise problem simultaneously
Solution Approach 2:
The patent introduces a protrusion structure on the base stand as an intermediary element that mediates between the flexible substrate and peripheral components. This protrusion creates a clearance zone that prevents the flexible substrate from contacting peripheral components during deformation, without imposing any constraining force on the substrate itself
2Volume of moving object
If the electronic cassette is made thinner to reduce size, then portability is improved, but space between components is reduced causing flexible substrate deformation and contact with nearby components
Solution Approach 1:
The patent solves the space constraint problem by utilizing the vertical dimension (thickness direction) rather than horizontal spacing. The protrusion structure extends in the thickness direction to create clearance, allowing the flexible substrate to deform without contacting peripheral components even when the cassette is made thin, thus maintaining portability while preventing contact noise
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
Prevents noise generation by avoiding contact between the flexible substrate and peripheral components, maintaining image quality without restricting the flexible substrate's deformation, thus ensuring stable connections and reduced tension.
Implementation Method 1
a radiation detection panel that includes optoelectric conversion elements that convert irradiated radiation into an electrical signal
Data Source
AI summary
A portable radiographic imaging device including: a radiation detection panel including optoelectric conversion elements that convert irradiated radiation into an electrical signal; a signal processing substrate performing predetermined signal processing on the input electrical signal; a holding base provided between the radiation detection panel and the signal processing substrate and holding the signal processing substrate; a flexible substrate including a flexed portion, with one end of the flexible substrate being connected to the radiation detection panel and the other end of the flexible substrate being connected to the signal processing substrate; a casing in which the radiation detection panel, the signal processing substrate, the holding base and the flexible substrate are installed; and a contact avoidance portion formed at at least one of the signal processing substrate, the holding base or the casing such that contact of with the flexible substrate is avoided, is provided.