Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays

The principal causes of the poor picture quality on active matrix organic light-emitting diode (AMOLED) displays, operating under extremely low brightness and gray-scale conditions, were analyzed and verified by measuring and modelling of the electrical simulations. Through the analysis, it was foun...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Se Hwan Na, Won Kyung Min, Do Hyung Kim, Han Wook Hwang, Yong Min Ha, Hyun Jae Kim
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	active matrix organic light-emitting diode (amoled) ultra-low luminance picture quality low pixel current picture quality enhancement optimization of electric potential Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/374320c22f0b4041813f16b36849e152
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:374320c22f0b4041813f16b36849e152
record_format	dspace
spelling	oai:doaj.org-article:374320c22f0b4041813f16b36849e1522021-11-26T11:19:47ZEnhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays1598-03162158-160610.1080/15980316.2021.1923581https://doaj.org/article/374320c22f0b4041813f16b36849e1522021-10-01T00:00:00Zhttp://dx.doi.org/10.1080/15980316.2021.1923581https://doaj.org/toc/1598-0316https://doaj.org/toc/2158-1606The principal causes of the poor picture quality on active matrix organic light-emitting diode (AMOLED) displays, operating under extremely low brightness and gray-scale conditions, were analyzed and verified by measuring and modelling of the electrical simulations. Through the analysis, it was found that the deteriorated picture quality was induced by a delayed saturation voltage, which means the electric potential difference between the initial voltage applied to the anode of the OLED (Vinit) and the OLED saturated voltage (Vsat) for emission. This is because the deviations of pico-ampere-level currents and delayed OLED charging prior to light emission increased the saturation voltage when there were low driving currents. Thus, we optimized the voltage by increasing Vinit from −4.5 to −2.7 V, effectively eliminating image deterioration by reducing the OLED charging delay. Thus, the proposed approach opens up advancements of obtaining superior picture quality with ultra-low luminance, even in the dark illuminance environments. We discuss how OLED picture quality may be enhanced under low brightness, including the driving methods, design considerations, and processes involved.Se Hwan NaWon Kyung MinDo Hyung KimHan Wook HwangYong Min HaHyun Jae KimTaylor & Francis Grouparticleactive matrix organic light-emitting diode (amoled)ultra-low luminance picture qualitylow pixel currentpicture quality enhancementoptimization of electric potentialComputer engineering. Computer hardwareTK7885-7895ENJournal of Information Display, Vol 22, Iss 4, Pp 275-284 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	active matrix organic light-emitting diode (amoled) ultra-low luminance picture quality low pixel current picture quality enhancement optimization of electric potential Computer engineering. Computer hardware TK7885-7895
spellingShingle	active matrix organic light-emitting diode (amoled) ultra-low luminance picture quality low pixel current picture quality enhancement optimization of electric potential Computer engineering. Computer hardware TK7885-7895 Se Hwan Na Won Kyung Min Do Hyung Kim Han Wook Hwang Yong Min Ha Hyun Jae Kim Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays
description	The principal causes of the poor picture quality on active matrix organic light-emitting diode (AMOLED) displays, operating under extremely low brightness and gray-scale conditions, were analyzed and verified by measuring and modelling of the electrical simulations. Through the analysis, it was found that the deteriorated picture quality was induced by a delayed saturation voltage, which means the electric potential difference between the initial voltage applied to the anode of the OLED (Vinit) and the OLED saturated voltage (Vsat) for emission. This is because the deviations of pico-ampere-level currents and delayed OLED charging prior to light emission increased the saturation voltage when there were low driving currents. Thus, we optimized the voltage by increasing Vinit from −4.5 to −2.7 V, effectively eliminating image deterioration by reducing the OLED charging delay. Thus, the proposed approach opens up advancements of obtaining superior picture quality with ultra-low luminance, even in the dark illuminance environments. We discuss how OLED picture quality may be enhanced under low brightness, including the driving methods, design considerations, and processes involved.
format	article
author	Se Hwan Na Won Kyung Min Do Hyung Kim Han Wook Hwang Yong Min Ha Hyun Jae Kim
author_facet	Se Hwan Na Won Kyung Min Do Hyung Kim Han Wook Hwang Yong Min Ha Hyun Jae Kim
author_sort	Se Hwan Na
title	Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays
title_short	Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays
title_full	Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays
title_fullStr	Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays
title_full_unstemmed	Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays
title_sort	enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for oled charging in the amoled displays
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/374320c22f0b4041813f16b36849e152
work_keys_str_mv	AT sehwanna enhancementofpicturequalityonultralowbrightnessbyoptimizingtheelectricalpotentialrequiredforoledchargingintheamoleddisplays AT wonkyungmin enhancementofpicturequalityonultralowbrightnessbyoptimizingtheelectricalpotentialrequiredforoledchargingintheamoleddisplays AT dohyungkim enhancementofpicturequalityonultralowbrightnessbyoptimizingtheelectricalpotentialrequiredforoledchargingintheamoleddisplays AT hanwookhwang enhancementofpicturequalityonultralowbrightnessbyoptimizingtheelectricalpotentialrequiredforoledchargingintheamoleddisplays AT yongminha enhancementofpicturequalityonultralowbrightnessbyoptimizingtheelectricalpotentialrequiredforoledchargingintheamoleddisplays AT hyunjaekim enhancementofpicturequalityonultralowbrightnessbyoptimizingtheelectricalpotentialrequiredforoledchargingintheamoleddisplays
_version_	1718409527834968064

Enhancement of picture quality on ultra-low brightness by optimizing the electrical potential required for OLED charging in the AMOLED displays

Ejemplares similares