Patent ID: 7543951
Filing Date: 2009-06-09
Classification: B43L,H04M

Abstract:
1. An apparatus having a luminous writing surface configured to receive a removable marking thereon, the apparatus comprising: an essentially planar member having a front surface, at least one side surface, and a back surface, the front surface comprising the writing surface; at least one light source associated with the essentially planar member for irradiating at least one of the side surface and the back surface thereof with visible light perceivable by an observer from the front surface, the visible light providing at least one background color for the removable marking when received on the writing surface; and at least one controller coupled to the at least one light source and configured to control at least one of a color, a color temperature and an intensity of the visible light so as to provide the at least one background color, wherein the at least one controller is configured to control the at least one background color based at least in part on (i) ambient light in an environment around the apparatus and/or (ii) a color of the removable marking.