Abstract

This paper presents a new driving scheme utilizing an in-pixel metal-insulator-semiconductor (MIS) photosensor for luminance control of active-matrix organic light-emitting diode (AMOLED) pixel. The proposed 3-TFT circuit is controlled by an external driver performing the signal readout, processing, and programming operations according to a luminance adjusting algorithm. To maintain the fabrication simplicity, the embedded MIS photosensor shares the same layer stack with pixel TFTs. Performance characteristics of the MIS structure with a ${{nc}}{{--}}{{Si}}:{{H}}/a{{-}}{{Si}}:{{H}}$ bilayer absorber were measured and analyzed to prove the concept. The observed transient dark current is associated with charge trapping at the insulator–semiconductor interface that can be largely eliminated by adjusting the bias voltage during the refresh cycle. Other factors limiting the dynamic range and external quantum efficiency are also determined and verified using a small-signal model of the device. Experimental results demonstrate the feasibility of the MIS photosensor for the discussed driving scheme.

© 2013 IEEE

Optimal scan strategy for mega-pixel and kilo-gray-level OLED-on-silicon microdisplay

Yuan Ji, Feng Ran, Weigui Ji, Meihua Xu, Zhangjing Chen, Yuxi Jiang, and Weixin Shen
Appl. Opt. 51(17) 3731-3743 (2012)

Ultra-high-image-density large-size organic light-emitting devices based on In-Ga-Zn-O thin-film transistors with a coplanar structure

Hong Jae Shin and Tae Whan Kim
Opt. Express 26(13) 16805-16812 (2018)

Accurate luminance and chromaticity controls of digital colors using CIE-based RGBW algorithms

Ni Tang, Jiyong Wang, Baofeng Zhang, Hao Chen, and Min Qiu
J. Opt. Soc. Am. A 40(3) A178-A182 (2023)

Cool white light-emitting three stack OLED structures for AMOLED display applications

Ramon Springer, Byoung Yeop Kang, Raju Lampande, Dae Hyun Ahn, Simone Lenk, Sebastian Reineke, and Jang Hyuk Kwon
Opt. Express 24(24) 28131-28142 (2016)

Ultrahigh-linearity dual-drive scheme using a single silicon modulator

Hengsong Yue, Kaizhong Chen, and Tao Chu
Opt. Lett. 48(11) 2995-2998 (2023)