Oetjen Sophie, Ziefle Martina
RWTH Aachen University, Aachen, Germany.
Appl Ergon. 2009 Jan;40(1):69-81. doi: 10.1016/j.apergo.2008.01.008. Epub 2008 Mar 10.
An increasing demand to work with electronic displays and to use mobile computers emphasises the need to compare visual performance while working with different screen types. In the present study, a cathode ray tube (CRT) was compared to an external liquid crystal display (LCD) and a Notebook-LCD. The influence of screen type and viewing angle on discrimination performance was studied. Physical measurements revealed that luminance and contrast values change with varying viewing angles (anisotropy). This is most pronounced in Notebook-LCDs, followed by external LCDs and CRTs. Performance data showed that LCD's anisotropy has negative impacts on completing time critical visual tasks. The best results were achieved when a CRT was used. The largest deterioration of performance resulted when participants worked with a Notebook-LCD. When it is necessary to react quickly and accurately, LCD screens have disadvantages. The anisotropy of LCD-TFTs is therefore considered to be as a limiting factor deteriorating visual performance.
使用电子显示器和移动计算机的需求不断增加，这凸显了在使用不同屏幕类型时比较视觉性能的必要性。在本研究中，将阴极射线管（CRT）与外部液晶显示器（LCD）和笔记本电脑液晶显示器进行了比较。研究了屏幕类型和视角对辨别性能的影响。物理测量表明，亮度和对比度值会随着视角的变化而改变（各向异性）。这在笔记本电脑液晶显示器中最为明显，其次是外部液晶显示器和阴极射线管。性能数据显示，液晶显示器的各向异性对完成时间紧迫的视觉任务有负面影响。使用阴极射线管时取得了最佳结果。当参与者使用笔记本电脑液晶显示器时，性能下降最大。在需要快速准确反应时，液晶显示屏存在劣势。因此，液晶薄膜晶体管的各向异性被认为是降低视觉性能的一个限制因素。
