Flexible Substrate Radiation Imaging Sensor R-Shape Design
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Solution Overview
Problem
Radiation imaging apparatuses, particularly mammography devices, face challenges in minimizing the non-sensor portion to prevent defects and breakage of the radiation image detector due to the limitations of existing designs that prevent the sensor portion from being close to the side surface of the housing, leading to incomplete radiation detection and vulnerability to impact.
Innovation Solution
A radiation imaging apparatus design featuring a flexible substrate with photoelectric conversion elements and a phosphor member disposed on a support member that follows an R-shape along the side surface of the housing, allowing the substrate to be continuously positioned near the side surface and reducing the risk of breakage while maintaining effective radiation detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection electrode and flexible wiring substrate are provided on the outer periphery of the radiation image detector, then electrical connection is achieved, but the sensor portion cannot be brought close to the side surface of the housing
Solution Approach 1:
The substrate is bent along an R-shape curve to transition from a flat two-dimensional configuration to a three-dimensional curved configuration. This allows the substrate to wrap around and approach the side surface of the housing, increasing the sensor portion area while maintaining electrical connection through the flexible substrate's ability to conform to the curved path.
Solution Approach 2:
A flexible substrate is used instead of a rigid substrate, allowing it to be bent into an R-shape configuration. This flexibility enables the substrate to approach the side surface of the housing closely while maintaining structural integrity and electrical connection, thereby increasing the effective sensor area without compromising connection reliability.
2Reliability
If sealing agent is applied to the substrate and phosphor sheet end face, then sealing and protection are achieved, but the sensor portion cannot be brought close to the side surface of the housing
Solution Approach 1:
By bending the substrate along an R-shape, the sealed structure is transformed from a flat configuration to a curved one that can approach the side surface of the housing. This dimensional change allows the sensor portion to extend closer to the side surface while the sealing agent maintains its protective function on the substrate and phosphor sheet end face.
Solution Approach 2:
The substrate is configured with an R-shape curvature, allowing the sealed assembly to follow a curved path that brings the sensor portion closer to the side surface of the housing. The sealing agent remains effective on the curved surface, maintaining reliability while enabling increased sensor area coverage.
3Reliability
If buffer means is disposed between the base and the side wall of the housing, then protection from impact is achieved, but the sensor portion cannot be brought close to the side surface of the housing
Solution Approach 1:
The flexible substrate itself serves as a protective element that can be bent into an R-shape, allowing it to approach the side surface of the housing closely. The flexibility of the substrate provides inherent impact absorption and protection, eliminating the need for separate rigid buffer means that would prevent the sensor portion from approaching the side surface.
Solution Approach 2:
By transitioning to a three-dimensional R-shape configuration, the substrate can approach the side surface of the housing while maintaining adequate spacing for protection. The curved configuration allows the sensor portion to extend closer to the side surface without requiring linear buffer space, thus increasing sensor area while maintaining impact protection.
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 design enhances the detection area and reduces defects in radiation images by bringing the photoelectric conversion elements and phosphor member closer to the side surface, preventing breakage and improving image quality.
Implementation Method 1
a phosphor member configured to convert radiation into visible light
Implementation Method 2
a plurality of photoelectric conversion elements including thin film transistors are two-dimensionally arranged
Data Source
AI summary
A radiation imaging apparatus includes a radiation image detection unit including a flexible substrate, photoelectric conversion elements arranged on the substrate, and a phosphor member disposed on an upper part of the substrate, a housing accommodating the radiation image detection unit, and a support member having the substrate disposed along a side surface for non-radiation transmission in the housing from a surface for radiation transmission in the housing.