| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a planer lighting device which can illuminate not only a partial area but a wide area such as a room even with light emitting elements by utilizing light of the emitting elements effectively. <P>SOLUTION: A plurality of light emitting elements 1 of a reflection type and a chip type are arranged in a matrix shape and mounted on a surface of an insulating substrate 2 having electrode wiring everywhere on the surface so as to be connected to the electrode wiring, where the plurality of the light emitting elements 1 are connected to each other in series and/or parallel with not shown electrode wiring. A light dispersion plate 3 is formed on the light emitting side of the chip type light emitting elements 1 through a fixed spacing d from the chip type light emitting elements 1, and a heat sink 4 is formed on the other side of the insulating substrate 2 so as for an air layer not to exist between them. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
