Principle and validation of digital driving for active matrix organic light emitting diodes displays

Abstract

The feasibility of digital driving has been investigated, which may be an enabling technology for low‐cost, power‐efficient and high‐quality active matrix organic light emitting diodes displays (AMOLED displays). The theoretical requirements therefore are analyzed. Methods for avoiding imaging artifacts are proposed. Results based on two prototypes are presented showing that digital drive is feasible for state‐of‐the‐art manufacturing technology with comparable image quality to analog‐driven AMOLED displays but at lower power consumption and lower production cost.

Large‐Area CVD‐Grown MoS2 Driver Circuit Array for Flexible Organic Light‐Emitting Diode Display

“…For the pixel driving circuit, we utilized the simple 2T-1C OLED driving scheme, [37,42] which consists of switching and driving TFTs. By utilizing synthesized MoS 2 thin films, we demonstrated a flexible AMOLED pixel driving-circuit array on a flexible polyimide (PI) substrate where the driving circuit is composed of two MoS 2 TFTs.…”

19.2: Distinguished Student Paper: Compensation of OLED I‐V‐Drift for Suppressing Image Sticking in A Digital AMOLED Display Module

“…By assuming only a small part of the pixels is much more aged than other pixels, the simulation method described in [5] can directly be applied. Otherwise, it may be necessary to consider the measured distribution.…”

“…In [5] we have disclosed a method to simulate the pixel current and pixel voltage of an digitally driven AMOLED-display. The pixel current as well as the pixel voltage depends on the subframe matrix, on the resistance of the trace and supply line as well as on the inner resistance of the power supply.…”

“…The input image data are now distort with this compensation matrix and the single subframes can be determined by applying a simple compare function as written in [5].…”

16‐4: Invited Paper: Acquiring longer AMOLED Lifetime with Digital Aging Compensation

“…Different pixel current for different subframes may cause a non-linear or even nonmonotone transfer of gray value to luminance. In [2] methods for simulation of pixel current distribution and decomposition of an image matrix into several subframe matrices are described. The basic equations are Kirchhoff laws, the physical characteristics of the display panel and of OLED devices.…”