不同观看距离下的大屏适宜字号研究

Research on the Appropriate Font Size for Large Screens under Different Viewing Distances

目的针对超大型屏幕的字号设计,探索在不同的观看距离下,文字和数字的适宜字号。方法实验为4(字号大小;10 pt、12 pt、14 pt和16 pt)*3(观看距离;3 m、5 m和7 m)的组内设计,因变量为被试完成任务的反应时和对不同字号的主观清晰度评分。实验共招募24位被试参与。结果观看距离会显著影响被试的反应时和清晰度评分。在同一字号下,观看距离越远,被试的反应时越长,清晰度评分也越低。结合反应时与主观清晰度评分,得出在3 m观看距离下的大屏字号建议不低于12pt,而在5 m和7 m观看距离下的大屏字号建议不低于14pt,文字与数字的字号建议不存在差异。结论研究结果可用于指导大屏的适宜字号设计,设计及开发人员应结合大屏的观看距离应用适宜的字号大小。

Objective The purpose of this study is to explore the appropriate font size of characters and numbers at different viewing distances for the font size design of super-large screens.Methods The experiment was a within-group design of 4(font sizes:10pt,12pt,14pt,and 16pt)*3(viewing distances:3m,5m,and 7m),and the dependent variables were the participants'response time when completing the task and their subjective clarity scores for different font sizes.A total of 24 participants were recruited to participate in the experiment.Results Viewing distance significantly affected participants'response time and clarity scores.For the same font size,the farther the viewing distance,the longer the response time and the lower the clarity scores.Upon the response time and subjective clarity scores,it is suggested that the font size of the large screen at a viewing distance of 3 meters is no less than 12pt,and the font size of the large screen at a viewing distance of 5 meters and 7 meters is recommended to be no less than 14pt.There is no difference in the font size recommendations for characters and numbers.Conclusion The research results can be used to guide the appropriate font size design for large screens.Designers and developers should apply appropriate font sizes according to the viewing distance of large screens.