X-Ray Detector Gate Circuit Layout for Miniaturization
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Solution Overview
Problem
Existing X-ray detectors face challenges in miniaturization due to the large size of gate boards and the need for long gate connection flexible printed circuit boards, which hinder flexible and compact designs.
Innovation Solution
The X-ray detector is designed with a gate chip-on-film and a gate connection flexible printed circuit board disposed along different sides, and the readout circuit is integrated as a chip-on-film, allowing for a miniaturized and flexible detector configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a gate board is used to drive TFTs, then the gate circuit can be implemented, but the detector size becomes large and miniaturization is difficult
Solution Approach 1:
The gate circuit is divided into two separate components: a gate COF (chip-on-film) that generates gate signals and a gate connection FPCB that transmits driving signals. This segmentation allows each component to be optimized independently and reduces the overall area requirement compared to a monolithic gate board.
Solution Approach 2:
The gate COF and gate connection FPCB are arranged along different sides of the TFT detector array. This spatial distribution in different dimensions allows the components to be positioned without interfering with each other, enabling compact overall design while maintaining functional requirements.
2Adaptability or versatility
If a gate connection FPCB is used to connect gate COF with external driving circuit, then the gate circuit can be driven externally, but the FPCB length becomes relatively large and detector miniaturization is hindered
Solution Approach 1:
The gate driving function is segmented into a gate COF (signal generation) and a gate connection FPCB (signal transmission). This allows the FPCB to be optimized for connection purposes while the COF handles the complex signal generation, enabling more compact FPCB dimensions.
Solution Approach 2:
By positioning the gate connection FPCB along a side different from where the readout circuit is located, the layout utilizes different spatial dimensions. This arrangement allows the FPCB to be positioned optimally for external connection while minimizing its impact on the overall detector footprint.
3Device complexity
If the gate COF and gate connection FPCB are formed together along one side of TFT detector, then the structure is compact, but the miniaturization potential is offset and imaging close contact with object is difficult
Solution Approach 1:
The gate COF and gate connection FPCB are positioned along different sides of the TFT detector array. This dimensional separation allows the components to be arranged without occupying the same spatial zone, enabling the detector to maintain a compact profile while preserving the ability to contact objects closely for high-quality imaging.
Data Source
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 circuity 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.