X-Ray Detector Gate Layout for Compact Flexible TFT Panels
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Solution Overview
Problem
Existing X-ray detectors face challenges in miniaturization due to the large size of gate boards, which hinder the development of flexible and compact designs, particularly when integrating a gate connection FPCB with a gate COF, leading to increased size and interference.
Innovation Solution
The X-ray detector is designed with a gate chip-on-film and gate connection FPCB disposed along different sides, allowing for a miniaturized structure by separating the gate connection FPCB from the gate chip-on-film and positioning it alongside the readout circuit, enabling a flexible and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gate board is used to drive TFTs, then the gate circuit can be implemented, but the device size becomes large and flexible design is difficult
Solution Approach 1:
The gate circuit is segmented into two parts: a gate COF (chip-on-film) that remains on the detector and a gate connection FPCB that extends externally. This segmentation allows the main detector area to remain compact while the connection interface can be positioned separately, enabling flexible detector designs.
Solution Approach 2:
The gate connection FPCB is extended in a direction perpendicular to the TFT array plane, allowing the connector to be positioned away from the detector body. This dimensional change separates the connection interface from the active detection area, reducing interference and enabling flexible configurations.
2Ease of operation
If a gate connection FPCB is extended to connect with external driving circuit, then signal transmission is enabled, but the device length increases and miniaturization is hindered
Solution Approach 1:
The FPCB is routed in a direction perpendicular to the TFT array, allowing the connector to be positioned at the edge of the detector. This spatial optimization minimizes the protruding length while maintaining external connection capability.
3Device complexity
If gate COF and readout circuit are formed along the same side, then circuit integration is achieved, but the device width increases and compact design becomes difficult
Solution Approach 1:
The gate COF and readout circuit are positioned on opposite sides of the TFT array, utilizing the vertical dimension rather than expanding horizontally. This arrangement maintains circuit integration while minimizing the detector width, enabling more compact designs.
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 minimizes the protruding length of the gate connection FPCB, allowing the detector to be in close contact with objects, facilitating effective imaging and reducing interference between components.
Implementation Method 1
an photoconductor layer formed on the substrate, the photoconductor layer generating electric charges according to incident X-rays
Data Source
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AI summary
This X-ray detector which detects an X-ray and generates a corresponding output signal comprises: a TFT array including a plurality of pixel TFT circuits each generating the output signal according to the intensity of the detected X-ray; a gate circuit configured to apply, to the TFT array, a gate signal for driving the plurality of pixel TFT circuits; and a readout circuit configured to receive the output signal generated by each of the plurality of pixel TFT circuits and transmit the output signal to the outside. The gate circuit comprises: a gate chip-on film configured to generate the gate signal and apply the gate signal to the TFT array; and a gate connection FPCB circuitly connected to the gate chip-on film so as to receive a driving signal for generating the gate signal and transmit the driving signal to the gate chip-on film. The gate chip-on film and the gate connection FPCB are respectively arranged along different sides of the X-ray detector.