Patent ID: 7942538
Filing Date: 2011-05-17
Classification: H01H,H04M

Abstract:
1. An information presenting device comprising: a first information layer including a first information presentation structure of photo chromatic material configured to be in an activated state based on incident light of a first wavelength, wherein, when in the activated state, the photo chromatic material is to present the first information presentation structure, and, when in a non-activated state, the first information presentation structure is not presented; a second information layer including a second information presentation structure disposed between the first information layer and a first light source; and the first light source to illuminate a surface of the second information layer, which is furthest from the first information layer, to present the second information presentation structure via the first information layer, wherein the first information layer is configured to be in the activated state when the first information layer is subjected to incident ambient light in excess of an amount of the incident ambient light that results in a user being unable to perceive information provided by the second information layer, and to be transparent to light of a second wavelength from the first light source when the first information layer is in the non-activated state.