Type of Document Master's Thesis Author Burnette, James Tilson URN etd-06082010-020414 Title Optimal element size-shape-spacing combinations for a 5 X 7 dot matrix visual display under high and low ambient illuminance. Degree Master of Science Department Industrial Engineering and Operations Research Advisory Committee
Advisor Name Title Snyder, Harry L. Committee Chair Prestrude, Albert M. Committee Member Price, Dennis L. Committee Member Keywords
- matrix visual display
Date of Defense 1976-12-14 Availability restricted AbstractA broad range of element size, element shape, and interelement spacing/element size ratio combinations at high and low ambient illuminance levels was used to determine optimal combinations for a 5 X 7 dot matrix visual display. Three tasks - a reading test, a random search task, and a structured (menu) search task - were used to enhance the utility of the research. All tasks were displayed on a CRT display 1.02 m from the subject.
There were different overall results for the reading and the search tasks, as shown by an analysis of variance. The smaller elements (0.76 and 1.14 mm) and the 0.5 space/size ratio produced the shortest reading times, while the shortest search times came from the larger elements (1.14 and 1.52 rum). The square shape and low illuminance level (5.4 lux) had the shortest times for all three tasks.
For a general purpose display, the combination of a square 1.14 rum dot, with 0.57 mm edge-to-edge spacing is recommended, to be used with the lowest practical ambient illuminance.
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