Quantitative analysis of pixel crosstalk in AMOLED displays

Abstract

The resolution of organic light-emitting diode (OLED) displays is increasing steadily as these displays are adopted for mobile and virtual reality (VR) devices. This leads to a stronger pixel crosstalk effect, where the neighbors of active pixels unintentionally emit light due to a lateral electric current between the pixels. Recently, the crosstalk was quantified by measuring the current flowing through the common hole transport layer between the neighboring pixels and comparing it to the current through the active pixel diode [S.-K. Kwon, K.-S. Kim, H.-C. Choi and J. H. Kwon, presented at the International Meeting on Information Display, Jeju, South Korea, 2016]. The measurements showed that the crosstalk is more crucial for low light levels. In such cases, the intended and parasitic currents are similar. The simulations performed in this study validated these measurement results. By simulations, we quantify the crosstalk current through the diode. The luminous intensity can be calculated with the measured current efficiency of the diodes. For low light levels, the unintended luminance can reach up to 40% of the intended luminance. The luminance due to pixel crosstalk is perceivable by humans. This effect should be considered for OLED displays with resolutions higher than 300 PPI.

Display meets biology: A vision for ubiquitous healthcare platforms

“…Second, integration capacity with external components needs to be tackled for system developments . As well explained by Gao et al, a truly mobile technology requires smart power management and advanced data processing in addition to efficient biointerfacing, ideally available on a standalone platform.…”

“…Second, integration capacity with external components needs to be tackled for system developments. 63,64 As well explained by Gao et al, 8 a truly mobile technology requires smart power management and advanced data processing in addition to efficient biointerfacing, ideally available on a standalone platform. In this regard, advances in thin-film energy harvesting devices (eg, solar cells, piezo/tribo/thermoelectric generators) have shown promising results, including a demonstration of the self-powered in vivo recording of cardiac signal enabled by integrated stretchable photovoltaics.…”

3.3: Modeling Electrical and Optical Cross‐Talk between Adjacent Pixels in Organic Light‐Emitting Diode Displays

“…1(a). [5][6] LAOSS solves the current continuity equation through the FEM in 2D domains, i.e. the top and bottom electrodes of the light-emitting device.…”

52‐5: A Color Gamut Mapping Method Using an OLED Display Model

“…In order to convert color gamut of an OLED display to the standard gamut, a mathematical panel model is needed to predict output luminance of an OLED panel. [4] Especially, as CGM function is required to be applied to individual panels produced in a factory, a precise panel model is necessary to reduce the time consumed for CGM. [5] There are several methods had been proposed previously, but most of them dealt with CGM lightly because they focused on effective Color Space Converter (CSC) implementation methods.…”