Title :
Readability of Characters on Display Faceplates in Terms of Human Sensation
Author :
Muraoka, Tetsuya ; Nakashima, Noboru ; Ikeda, Hiroaki
Author_Institution :
Polytech. Univ. in Tokyo, Tokyo, Japan
Abstract :
Readability tests were carried out for three types of displays; a TFT-LCD with backlight of white LED matrices, a TFT-LCD with backlight of two-row cold cathode fluorescent lamps (CCFLs), and a CRT. Readability of the TFT-LCD with backlight of white LED matrices was highest among the others from the viewpoint of flicker and luminance unevenness. The efficiency of VDT operations contiguously carried out for up to 90 minutes for the TFT-LCD with backlight of white LED matrices was higher than the other two types of displays by a factor of 10 to 20%, since the readability for up to 30 minutes was greatly improved by TFT-LCD with backlight of white LED matrices. Throughout these experimental studies, we found that the temperature rise was recognized of the ciliary muscles surrounding the eye lenses, when measured on the infra-red thermometer, due to fatigue of the ciliary muscles during the VDT operations.
Keywords :
cathode-ray tube displays; cold-cathode tubes; computer displays; fluorescent lamps; interactive terminals; light emitting diodes; liquid crystal displays; thin film transistors; vision; CRT; TFT-LCD display; VDT; backlight; character readability; ciliary muscle; display faceplates; eye lens; infrared thermometer; two-row cold cathode fluorescent lamps; visual display terminal; white LED matrices; Cathode ray tubes; Displays; Face; Fluorescent lamps; Humans; Lenses; Light emitting diodes; Muscles; Readability metrics; Temperature;
Conference_Titel :
Industry Applications Society Annual Meeting, 2009. IAS 2009. IEEE
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4244-3475-6
Electronic_ISBN :
0197-2618
DOI :
10.1109/IAS.2009.5324830
