Abstract
LED technology has been proved to be a great platform to advertise digital imaging content and targeted for outdoor signage applications. Some considerations must be taken when a LED screen is designed and later installed outdoor where the environmental elements affect the image on the LED screen. These environmental elements like sunlight, sun thermal‐load, wind, humidity, rain, and dust are affecting not just the video image, but also the performance and the lifetime of the product.I want to focus on an important and often overlook attribute for a screen in direct sunlight and that is the contrast ratio.The reflectivity of the materials used to produce the screen will affect the black level of the screen and hence its contrast.
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