THIN FILM TRANSISTOR ARRAY SUBSTRATE FOR DIGITAL X-RAY DETECTOR AND THE DIGITAL X-RAY DETECTOR INCLUDING THE SAME

According to the present invention, one or more shielding layers are formed to cover an active layer on a driving thin film transistor, and the shielding layer minimizes the exposure of the driving thin film transistor by X-rays by maximally preventing X-rays from being directly emitted to the activ...

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Bibliographische Detailangaben
Hauptverfasser: JAE HO YOON, SHI HYUNG PARK, MOON SOO KANG, DONG HYEON JANG
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:According to the present invention, one or more shielding layers are formed to cover an active layer on a driving thin film transistor, and the shielding layer minimizes the exposure of the driving thin film transistor by X-rays by maximally preventing X-rays from being directly emitted to the active layer. In addition, according to the present invention, by electrically connecting one or more shielding layers to a data line and applying a positive voltage, it is possible to restore a negatively shifted threshold voltage in the driving thin film transistor exposed to X-rays to the original state as much as possible. A thin film transistor array substrate includes a base substrate, a plurality of gate lines, the driving thin film transistor, and a PIN diode. 본 발명에 따르면 구동 박막 트랜지스터 상에 액티브층을 덮도록 하나 이상의 차폐층을 형성하고, 차폐층이 엑스레이가 액티브층에 직접적으로 조사되는 것을 최대한 방지함으로써 구동 박막 트랜지스터 소자가 엑스레이에 의해 노출되는 것을 최소화할 수 있다. 또한 본 발명에 따르면 하나 이상의 차폐층을 데이터 라인과 전기적으로 연결시키고 (+) 전압을 인가함으로써, 엑스레이에 노출되어 구동 박막 트랜지스터의 소자에서 네거티브 시프트된 문턱 전압을 최대한 원 상태로 원복시킬 수 있다.