Scintillator Panel Barrier Rib Material Selection
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Solution Overview
Problem
Scintillator panels with barrier ribs face issues of reduced phosphor volume and light absorption, leading to decreased image brightness and mechanical strength, particularly when using epoxy resin-based ribs which are prone to fracture during production.
Innovation Solution
A scintillator panel design incorporating a barrier rib made from compounds like polyimides, polyamides, or polybenzoxazoles with a metal reflecting layer and protective layers, optimized for high aspect ratio and surface smoothness to enhance light reflectance and mechanical strength, allowing for increased phosphor packing and improved image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If barrier ribs are introduced to section the phosphor layer, then image sharpness is improved, but the amount of phosphor is reduced and light brightness is decreased
Solution Approach 1:
The patent changes the material parameter of the barrier rib from conventional epoxy resin to polyimide resin, which has superior light transmittance properties. This parameter change reduces light absorption by the barrier rib itself, thereby increasing the overall light brightness while preserving the image sharpness enhancement provided by the barrier rib structure
Solution Approach 2:
The patent employs a composite material approach by using polyimide resin combined with specific phosphor materials and binder resins. This composite structure optimizes both the light-guiding function of the barrier rib and the light-emitting function of the phosphor layer, achieving high sharpness and high brightness simultaneously
2Ease of manufacture
If epoxy resin is used for barrier ribs, then manufacturing is simplified, but mechanical strength is insufficient and ribs are prone to fracture
Solution Approach 1:
The patent changes the material parameter from epoxy resin to polyimide resin, which inherently possesses superior mechanical strength and thermal stability. This material substitution maintains the ease of manufacturing through similar processing methods while dramatically improving the mechanical strength and fracture resistance of the barrier ribs
3Measurement precision
If barrier ribs are introduced to section the phosphor layer, then light scatter is reduced, but the barrier rib absorbs part of the light
Solution Approach 1:
The patent changes the optical parameter of the barrier rib material by selecting polyimide resin with high light transmittance and low absorption characteristics. This parameter change minimizes the light absorption by the barrier rib while preserving its light-scattering inhibition function, thereby reducing energy loss and increasing overall light output
Solution Approach 2:
The patent converts the potential harmful effect of barrier rib material absorption into a beneficial outcome by selecting a material (polyimide resin) that transforms the barrier rib from a light-absorbing obstacle into a light-transmitting structure that still provides effective light scattering control, thus turning a previously harmful absorption effect into a beneficial light-guiding function
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
The solution results in a scintillator panel with enhanced mechanical strength and brightness, maintaining image sharpness while reducing the likelihood of barrier rib fracture and improving light takeout efficiency.
Implementation Method 1
a metal reflecting layer and protective layers, optimized for high aspect ratio and surface smoothness to enhance light reflectance
Implementation Method 2
a scintillator panel contains a radiation phosphor. The radiation phosphor emits visible light in response to an applied radiation
Data Source
Figure 1~3
AI summary
An object of the present invention is to enable a scintillator panel of a type having a barrier rib to have sufficient mechanical strength and enhanced brightness. A scintillator panel including a substrate, a barrier rib formed on the substrate, and a scintillator layer having a phosphor and sectioned by the barrier rib, wherein the barrier rib contains one or more compounds (P) selected from the group consisting of polyimides, polyamides, polyamideimides, and polybenzoxazoles.