Extended Data Fig. 4: Electroluminescence performance of the display textile and EL unit.
From: Large-area display textiles integrated with functional systems
a, Luminance–voltage curve of the display textile based on the projected area of the textile. b, c, Higher applied voltage (b) and frequency (c) increase the luminance of the EL unit. Frequency used in b was 2,000 Hz. Voltage applied in c was 1.2 V μm−1. d, e, Current density–voltage (d) and power–luminance (e) characteristics of the EL unit. The inset of e shows the test circuit for measuring the power consumption of the EL unit. f, Calibration curve showing that the grey values extracted from photographs obtained from a camera are linearly correlated with the actual luminance of the EL unit as detected by a photodetector. g, Thermal images of an EL unit illuminated for increasing durations (under a power of ~300 μW). The arrows indicate the position of the EL unit. Scale bar, 5 mm. h, Local temperature variations of EL units under a power of ~300 μW. i, Luminance–frequency curve of the EL unit working at 35 V. Thickness of the luminescent layer is ~30 μm. Error bars represent the standard deviations of the results from at least three samples.
