Integrated gate driver circuit technology with IGZO TFT for sensing operation. Issue 5 (11th April 2019)

• Record Type: Journal Article
• Authors: Kim, In June; Noh, Seok; Ban, Myung Ho; Son, Kimin; Han, Inhyo; Shin, Hun Ki; Oh, Kilhwan; Kim, Bumsik; Kang, In Byeong
• Is Part Of: Journal of the Society for Information Display. Volume 27:Issue 5(2019)
• Page Start: 313
• Page End: 318
• Publication Date: 2019-04-11
• Subjects: IGZO TFT -- integrated gate driver circuit -- OLED TV -- sensing operation; Information display systems -- Periodicals; 621.38154205
• DOI: 10.1002/jsid.785
• Languages: English
• ISSNs: 1071-0922

Abstract

Abstract: In this paper, we propose a new integrated gate driver circuit for random sensing operation of external compensated organic light‐emitting diode (OLED) display using oxide thin‐film transistor (TFT). Using this technology, we successfully launched 55‐inch and 65‐inch ultrahigh definition OLED TVs with gate in panel (GIP) circuit. The structure of the existing OLED TVs implemented gate signals through the gate integrated circuits (ICs) attached to the left and right sides of the panel. The structure using the gate IC was inferior to the panel structure using the GIP in terms of process and product design and cost. Thus, we propose a new oxide GIP circuit for OLED TV. Like the previous gate IC model, the proposed GIP circuit successfully implemented the random sensing function during the display operation. This GIP circuit is also designed to overcome the problems caused by the negative Vth characteristics of the oxide device. Abstract : We propose a new integrated gate driver circuit for random sensing operation of external compensated organic light‐emitting diode (OLED) display using oxide thin‐film transistor (TFT). Using this technology, we successfully launched 55‐inch and 65‐inch ultrahigh definition OLED TVs with gate in panel (GIP) circuit. We confirmed random pulse implementation and completed the reliability test.