Radiation Imaging Sensor Panel Noise Shielding via Vertical Circuit Stacking

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Solution Overview

Problem

Radiant noise from circuit boards significantly influences sensor signals in radiation imaging apparatuses, particularly from the power supply circuit board, leading to signal degradation, and existing noise isolation methods increase the apparatus' size.

Innovation Solution

The radiation imaging apparatus arranges a digital circuit board with a smaller radiant noise generation between the sensor panel and the power supply circuit board, acting as a noise shield, and optionally uses a shield member or convex housing design to further reduce noise impact, while maintaining a compact size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a metal partition is used to isolate the sensor panel and power supply circuit board horizontally, then the influence of radiant noise is reduced, but the size of the housing increases

Engineering Contradiction:
Improveradiant noise influenceVSAvoidhousing size
Core Design Contradiction:
Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The patent transitions from horizontal isolation (2D plane separation) to vertical stacking (3D spatial arrangement). By arranging the analog circuit board, digital circuit board, and power supply circuit board in a vertical stack above the sensor panel, the design achieves noise isolation without increasing the horizontal footprint of the housing, thus resolving the contradiction between noise reduction and compact size.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent implements a nested arrangement where multiple circuit boards (analog, digital, power supply) are stacked vertically one above another, forming a compact tower structure above the sensor panel. This nesting approach maximizes spatial utilization and achieves effective noise isolation through layered positioning without expanding the overall housing dimensions.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Volume of stationary object

If circuit boards are arranged close to the sensor panel to reduce housing size, then the apparatus becomes more compact, but the influence of radiant noise on sensor signals increases

Engineering Contradiction:
Improvehousing volumeVSAvoidsignal degradation from radiant noise
Core Design Contradiction:
Volume of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by assigning specific functional roles to different vertical layers: the analog circuit board processes sensor signals immediately above the sensor panel, the digital circuit board handles digital processing above that, and the power supply circuit board provides power at the top. This functional stratification allows close proximity for signal integrity while maintaining noise isolation through the layered architecture.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

By moving from horizontal to vertical arrangement, the patent achieves compact volume while maintaining adequate separation distances in the vertical dimension. The stacked configuration allows circuit boards to be physically close to the sensor panel for signal integrity while the vertical stacking itself provides natural noise isolation through spatial separation in the third dimension.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 effectively reduces the influence of radiant noise on the sensor panel, minimizing signal degradation and preventing size increases in the imaging apparatus.

Implementation Method 1

arranges a digital circuit board with a lower radiant noise generation between the sensor panel and the power supply circuit board, acting as a noise shield to reduce noise influence

Methodology Applied
Scientific EffectElectromagnetic shielding: Faraday Cage

Implementation Method 2

a sensor panel in which a plurality of sensors configured to detect radiation are arrayed

Methodology Applied
Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS9961761B2Radiation imaging apparatus and imaging system
Publication Date: 2018.05.01 CANON KK
  • US9961761B2 patent drawing
  • US9961761B2 patent drawing
  • US9961761B2 patent drawing

AI summary

A radiation imaging apparatus, comprising a sensor panel in which a plurality of sensors configured to detect radiation are arrayed, a first circuit board that is arranged on the sensor panel and includes a circuit configured to read out a signal from each sensor, and a second circuit board that is arranged on the first circuit board and includes a circuit configured to read out a signal from each sensor, and whose radiant noise generation amount at a driving time of the circuit is larger than a radiant noise generation amount at a driving time of the circuit of the first circuit board, wherein the first circuit board is arranged between the sensor panel and the second circuit board.