Effects of display curvature, display zone, and task duration on legibility and visual fatigue during visual search task.
This study examined the effects of display curvature (400, 600, 1200 mm, and flat), display zone (5 zones), and task duration (15 and 30 min) on legibility and visual fatigue. Each participant completed two 15-min visual search task sets at each curvature setting. The 600-mm and 1200-mm settings yielded better results than the flat setting in terms of legibility and perceived visual fatigue. Relative to the corresponding centre zone, the outermost zones of the 1200-mm and flat settings showed a decrease of 8%-37% in legibility, whereas those of the flat setting showed an increase of 26%-45% in perceived visual fatigue. Across curvatures, legibility decreased by 2%-8%, whereas perceived visual fatigue increased by 22% during the second task set. The two task sets induced an increase of 102% in the eye complaint score and a decrease of 0.3 Hz in the critical fusion frequency, both of which indicated an increase in visual fatigue. In summary, a curvature of around 600 mm, central display zones, and frequent breaks are recommended to improve legibility and reduce visual fatigue.
Department of Human Factors Engineering, UNIST, 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea. Electronic address: psr926@unist.ac.kr.
Sungryul
S
Park
Department of Human Factors Engineering, UNIST, 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea. Electronic address: cuni09@unist.ac.kr.
Donghee
D
Choi
Department of Human Factors Engineering, UNIST, 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea. Electronic address: lindsey@unist.ac.kr.
Jihhyeon
J
Yi
Department of Human Factors Engineering, UNIST, 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea. Electronic address: songil@unist.ac.kr.
Songil
S
Lee
Display R&D Center, Samsung Display Co., Ltd., Gyeonggi-Do, Yongin 17113, Republic of Korea. Electronic address: dreaming@samsung.com.
Ja Eun
JE
Lee
Display R&D Center, Samsung Display Co., Ltd., Gyeonggi-Do, Yongin 17113, Republic of Korea. Electronic address: bh123.choi@samsung.com.
Byeonghwa
B
Choi
Display R&D Center, Samsung Display Co., Ltd., Gyeonggi-Do, Yongin 17113, Republic of Korea. Electronic address: color_lee@samsung.com.
Seungbae
S
Lee
Department of Human Factors Engineering, UNIST, 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea. Electronic address: ghkyung@unist.ac.kr.
Gyouhyung
G
Kyung
D001248:Asthenopia / Q000209:etiology* / Q000503:physiopathology; D016288:Computer Terminals; D004867:Equipment Design; D006804:Ergonomics; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D013647:Task Performance and Analysis; D013997:Time Factors; D064232:Visual Analog Scale; D055815:Young Adult
Display curvature; Legibility; Visual fatigue