Abstract: A flexible light emitting substrate in accordance with an embodiment hereof includes a controller, a base substrate that carries a data source printed or displayed thereon, which defines a plurality of grid locations, and a data display source provided on, under, or within the base substrate and is wirelessly or wiredly coupled to the controller. Each data display source is associated with a respective grid coordinate or with a specific location or with a position of an object or person relative to a boundary displayed on the base substrate. The embodiment further includes a position sensor for determining the current location of a person or object, and a power source for providing power to the data display source and the controller, where the controller is configured for selectively controlling operation of the data display source based at least partially on the determined current location of the person or object.