- 學位論文
具差模訊號擷取功能之TFT光感測畫素陣列研究
Study on the TFT Light Sensing Pixel Array with Differential Signal Extracting Function
摘要
近年來，隨著人工智慧科技的進步，各式各樣以擷取影像畫面資訊的應用蓬勃發展，諸如生物識別、醫療影像、裂縫檢測，以及各種辨識技術等。在影像感測系統當中，微弱訊號的擷取一直是最困難的課題之一。目前的感測技術由於訊號雜訊比不佳、接收影像的面積不夠大等因素，往往造成影像感測的資訊不夠完整。因此，利用薄膜電晶體在大面積製程的優勢，搭配差模訊號擷取的概念，本篇論文提出一具備差模訊號擷取功能的光感測畫素電路，分別為電容式線型和二極體式線型。為了解決線型電路在擴展成陣列上遇到的困難，我們利用二極體連接的概念進而提出環型光感測畫素陣列，並分為三角環型和四邊環型。此架構能成功地擷取共模訊號和差模訊號。論文詳細記錄了感測陣列的操作流程，相關的議題也將被探討並獲得解決方案。此外，我們所提出的光感測畫素陣列，其具備擷取共模訊號和差模訊號的功能透過HSPICE模擬得到了驗證。
並列摘要
In recent years, with the rapid development of artificial intelligence (AI) technology, a variety of applications that receive information from the image are booming, such as biometric, medical imaging, crack detection, and various types of identification. Among light sensing technology, reading the tiny signal is always one of the most difficult things for imaging system. Owing to the poor SNR and the fact that the area to receive image is not large enough in current imaging system, there is loss of information. By taking the advantage of the fact that TFT can be easily applied to the manufacture of large area products and the concept of reading differential signal, we propose a light sensing pixel circuit with differential signal extracting function in this dissertation. The circuit can be divided into capacitor line type and diode line type. To overcome the difficulties of extending line type circuits into arrays, we further propose the differential sensing pixel arrays of triangular ring type and square ring type by using the concept of diode connection. They successfully acquire the differential signal and the common signal concurrently. In this dissertation, the operation of proposed differential sensing pixel array is explained in detail, and the related issues are discussed and solved. Furthermore, the feasibility of the differential sensing pixel array is verified by HSPICE simulation.