Cooper Emily A, Jiang Haomiao, Vildavski Vladimir, Farrell Joyce E, Norcia Anthony M
Department of Psychology, Stanford University, Stanford, CA, USA.
J Vis. 2013 Oct 23;13(12):16. doi: 10.1167/13.12.16.
Vision researchers rely on visual display technology for the presentation of stimuli to human and nonhuman observers. Verifying that the desired and displayed visual patterns match along dimensions such as luminance, spectrum, and spatial and temporal frequency is an essential part of developing controlled experiments. With cathode-ray tubes (CRTs) becoming virtually unavailable on the commercial market, it is useful to determine the characteristics of newly available displays based on organic light emitting diode (OLED) panels to determine how well they may serve to produce visual stimuli. This report describes a series of measurements summarizing the properties of images displayed on two commercially available OLED displays: the Sony Trimaster EL BVM-F250 and PVM-2541. The results show that the OLED displays have large contrast ratios, wide color gamuts, and precise, well-behaved temporal responses. Correct adjustment of the settings on both models produced luminance nonlinearities that were well predicted by a power function ("gamma correction"). Both displays have adjustable pixel independence and can be set to have little to no spatial pixel interactions. OLED displays appear to be a suitable, or even preferable, option for many vision research applications.
视觉研究者依靠视觉显示技术向人类和非人类观察者呈现刺激物。在诸如亮度、光谱以及空间和时间频率等维度上，验证期望的视觉模式与显示的视觉模式是否匹配，是开展对照实验的重要环节。随着阴极射线管（CRT）在商业市场上几乎难觅踪影，确定基于有机发光二极管（OLED）面板的新型显示器的特性，以判断它们在产生视觉刺激方面的适用性，是很有必要的。本报告描述了一系列测量，总结了两款商用OLED显示器（索尼特丽魅彩EL BVM - F250和PVM - 2541）上显示图像的特性。结果表明，OLED显示器具有高对比度、宽色域以及精确且性能良好的时间响应。对两款型号的设置进行正确调整后，产生的亮度非线性可由幂函数（“伽马校正”）很好地预测。两款显示器都具有可调节的像素独立性，并且可以设置为几乎没有空间像素交互。对于许多视觉研究应用而言，OLED显示器似乎是一种合适甚至更优的选择。
