DIY LED display

The Light-emitting Diode (led, generally known as LED) have been completely used commonly. However, despite the large presence of LED with high brightness performance, in addition it contributes to a glare problem, which produces an immediate protection problem in signing up to traffics. For that reason, this research aimed to examine steps to make the Light-emitting Diode screen indication become more readable under high illuminative environments and to avoid the observers feeling dazzling glare under low illuminative environments. This analysis firstly learned the literatures to explore the drivers of aesthetic ergonomic as well as the optical properties of Light-emitting Diode, and investigated the fairly current norms for engineering vehicle LED screen signs. Three factors had been occur this research: three forms of background lighting, four forms of luminance contrast and two forms of character form. In the 1st phase of test, subjects observed LED display indications in both near and distant areas and done the SWN scale (Subjective Well-being under Neuroleptics), as well as in the second stage, topics were after that asked to moved ahead and recorded their particular perceptions of comfort and glare to distance range. The conclusions demonstrated that, there is no variation in subjective analysis to produce indications with no experiences either in the near or distant areas, while to show indications with experiences, the subjects perceptions had been the further the length, the better the legibility; higher background illumination could effectively reduce observers of glare perception to Light-emitting Diode display indications; display indications with experiences at luminance comparison of 3:1 (L maximum = 3100, L min = 1033 cd / m2) revealed the lowest uncomfortable and glare amount to observers. Both types of character showed no considerable variation in impacting observers in terms of the convenience and glare perception.

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