To raise power generation efficiency of a solar battery panel while increasing surface luminance.
A lighting device has the solar battery panel 1, and a light source 2 arranged on the back surface of the solar battery panel 1. The solar battery panel 1 is provided with a surface electrode 3 with a light-transmitting property, a back electrode 4 arranged on the back surface at an opposite side of the surface electrode 3, and a power generation layer 5 arranged between the back electrode 4 and the surface electrode 3 and generating power by absorbing light. The back electrode 4 of the solar battery panel 1 is a metal layer, the back electrode 4 of the metal layer has countless through-holes 6 capable of transmitting light, and dielectric antennas 7 for receiving light as an electromagnetic wave and emitting the received light are arranged on openings of the through-holes 6. The lighting device receives light of the light source 2 arranged on the back surface of the solar battery panel 1 by the dielectric antenna 7 arranged on the through-hole 6 of the back electrode 4, and emits the received light to a surface side of the solar battery panel 1.
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MORIKAWA TAKASHI
TAKAHASHI IPPEI
| JPH01149685U | 1989-10-17 | |||
| JP2005310896A | 2005-11-04 | |||
| JP2004273122A | 2004-09-30 | |||
| JP2002368244A | 2002-12-20 | |||
| JP2003100107A | 2003-04-04 |
Toshisu Koji