Identification of text and symbols on a liquid crystal display / Kingsley Fletcher ... [et al.]

Author
Fletcher, Kingsley (Kingsley I.)
Subjects
Information visualization.; Liquid crystal displays.; Visual acuity.
Summary
This study aimed to identify the minimum font size that supports fast and accurate identification of text and symbols displayed on an LCD under ambient lighting conditions similar to those in naval ships' operations rooms. A series of letters, numbers and combat symbols were displayed on an LCD for either 106 ms or 173 ms. Participants were asked to identify each stimulus and the certainty of their decision. Letters and numbers were presented in white, red, green and cyan, and symbols were either white or colour-coded. The stimulus heights subtended angles of between 8 minutes and 20 minutes. The study identified the minimum height at which accuracy and certainty were not significantly reduced. Two experiments were performed: one on a land-based sample, and one using Canadian Defence Force personnel during a sea trial in an attempt to identify the potential affects of ships motion and fatigue. Colour significantly improved the identification accuracy and certainty of symbols. Red numbers and letters were identified with significantly lower confidence than white, green or cyan. Some performance degradation was observed during the sea trial, and it is suggested that text and symbols ideally have a height of 16 min or greater, but that a height of 12.5 min or greater is acceptable. A height of less than 12.5 min must not be used for text or symbols that need to be rapidly identified.
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http://trove.nla.gov.au/work/28102462
Work ID
28102462
Editions
3 versions of this work are listed below
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Title, Author, Edition Date Language Format Libraries
Identification of text and symbols on a liquid crystal display / Kingsley Fletcher ... [et al.]. [electronic resource]. - Part 3, The effect of ambient light, colour and size /
Edinburgh, S. Aust. : DSTO, - PANDORA electronic collection. 2009 English Article; Report 3 & Online
Identification of text and symbols on a liquid crystal display / Kingsley Fletcher and Stuart Sutherland. [electronic resource]. - Part 1, Characterisation of the luminance, temporal and spectral characteristics /
Edinburgh, S. Aust. : DSTO, - PANDORA electronic collection 2009 English Archived website 3 & Online
Identification of text and symbols on a liquid crystal display / Kingsley Fletcher, Stuart Sutherland and Karen Nugent. [electronic resource]. - Part 2, Contrast and luminance settings to optimise legibility /
Edinburgh, S. Aust. : DSTO, - Technical report / DSTO ; DSTO-TR-2144 2009 English Article; Report Possibly online

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