Why Short-Throw Projector is necessary for Elevator Advertising Screen and how Kickstarter Backers Platform relates to that.Elevator advertising screens, also known as lift monitoring or elevator advertising pads, are a brand new medium in which ads can be displayed to capture the attention of the passengers during their rides up and down in the elevator.This screen lift serves as an informatory outdoor media.It includes information on weather conditions and pollution levels in real time as well as news flashes about some popular celebrities.Typically, such screens display text and graphics in monochrome. Note that one form of intelligent light emitting diodes known as "early warning" (Waoo.BigBird) has been developed by some manufacturers for use with screen lift displays.ˉHigh-definition LCDs and LEDs, capacitive touch screens, and the ability to connect to the internet for real-time data downloads - these are all examples of the technological advantages held by these screens for passenger information services“Passenger information display systems?” No, it’s not just a new term to describe advertising screens. This kind of technology is put to use in locations ranging from commercial buildings and hotels to shopping malls and apartment buildings.They are equipped with motion sensors which detect a person is nearby. The content will only be displayed if the passenger is present, saving both energy and improving user experience in reading it.