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Comparison of readability between liquid crystal displays and cathode-ray tubes
M Miyao1, S Ishihara, M Furuta
1Department of Public Health, Nagoya University School of Medicine, Japan.
Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene
|August 1, 1993
Summary
Liquid crystal displays (LCDs) and cathode-ray tubes (CRTs) were compared for readability. Non-backlit LCDs impaired visual focus and reading performance, especially in middle-aged individuals.
Area of Science:
- Human-Computer Interaction
- Visual Display Technology
- Ergonomics
Background:
- Flat-panel displays, particularly liquid crystal displays (LCDs), are now ubiquitous.
- The widespread adoption of LCDs necessitates an understanding of their impact on visual performance compared to older cathode-ray tube (CRT) technology.
Purpose of the Study:
- To compare the readability of LCDs and CRTs using a novel device.
- To investigate the influence of display type, age, and gender on visual performance.
Main Methods:
- Two experiments were conducted involving eye movement analysis and pupillo-accommodative function measurements.
- Four display types were tested: negative and positive CRTs, and LCDs with and without backlighting.
- Participants included subjects of varying ages and genders.
Main Results:
- Eye movement analyses revealed that middle-aged subjects exhibited slower reading speeds than younger subjects.
- Non-backlit LCDs significantly reduced focusing speed in young subjects.
- Middle-aged subjects experienced diminished reading performance when using non-backlit LCDs.
Conclusions:
- Non-backlit LCDs pose challenges for visual focus and reading performance, particularly for middle-aged individuals.
- Age-related visual differences necessitate tailored VDT viewing conditions.
- Recommendations include vision correction, appropriate display selection, and optimized illuminance for middle-aged workers using visual display terminals (VDTs).