酸化物半導体薄膜トランジスタを用いたアクティブ・マトリックス型FEDの回路検討

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2017/01/01

タイトル(英語): Circuit Consideration on Active Matrix FEDs Driven by Oxide Semiconductor Thin Film Transistors

著者名: 高木　茂行（東京工科大学　工学部　電気電子工学科）

著者名(英語): Shigeyuki Takagi (Electrical and Electronic Engineering, School of Engineering, Tokyo University of Technology)

キーワード: FED，Metal-insulator-metal，単純マトリックス，アクティブ・マトリックス，TFT，酸化物半導体　　FED，Metal-Insulator-metal，Simple matrix，Active matrix，TFT，Oxide Semiconductor

要約(英語): A TFT (Thin film transistor) driving-circuit for active-matrix was discussed to enlarge FEDs (Field emission display) using an MIM (Metal-insulator-metal) -cathode. The cathode has a thin insulator sandwiched with 2 conductive films, and the capacitance is proportional to the display size. In the simple matrix display, it is impossible to charge the wirings connected to the MIM-cathode to specification voltage within scanning time with enlarging of the display. We introduced an active matrix method, where the MIM-cathode was charged with the current switched by an oxide semiconductor TFT connected to DC power supply. The capability of 55-inch FHD (Full high definition) display was evaluated assuming the mobility of the TFT to be 10 cm2/Vs. As a result, it was shown that the current can be supplied to the MIM-cathode sufficiently by using the driving transistor Td with channel length of 8 μm and width of 100 μm. The wirings for DC power supply and GND are formed in both horizontal and vertical directions. The voltage-drop at the central portion of the display generated by the wiring resistance can be suppress to be less than 0.2 V, and the voltage has little influence on image quality. The performance of the 55-inch FHD display driven by active matrix with oxide semiconductor TFT was confirmed.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.137 No.1 （2017） 大特集：電子・情報・システム部門誌 30周年記念「電子・情報・システム技術によるイノベーション」

本誌掲載ページ: 154-162 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/137/1/137_154/_article/-char/ja/