| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device for enabling the position information management of a terminal device while suppressing a deterioration in a lighting function.SOLUTION: A lighting device includes a base plate 157, light sources 156 provided on one surface side of the base plate 157, and a position signal transmitter 158 provided on the one surface side to transmit prescribed position information to a radio terminal. The position signal transmitter 158 includes a first conductive layer laminated on the one surface, a first insulation layer laminated on the first conductive layer, a second conductive layer laminated on the first insulation layer to include a plurality of conductive patterns 201 which are respectively conductively connected to the first conductive layer to form an approximately comb shape as a whole, and a second insulation layer laminated on the second conductive layer, a second insulation layer 211 laminated on the second conductive layer, and a plurality of conductive patches 202 separately provided at a plurality of places overlapping the plurality of conductive patterns 201 in the second insulation layer 211. A portion of the light sources 156 are arranged between comb teeth of the second conductive layer when viewed in a direction perpendicular to the base plate 157.SELECTED DRAWING: Figure 8 |
