Digital signage is a sub segment of signage. Digital displays use technologies such as LCD, LED and Projection to display content such as digital images, video, streaming media, web pages, weather data, or text. They can be found in public spaces, transportation systems, museums, stadiums, retail stores, hotels, restaurants, and corporate buildings etc., to provide wayfinding, exhibitions, marketing and outdoor advertising. Digital Signage market is expected to grow from USD $15 billion to over USD $24bn by 2020.