| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light emitting device attaining a high circuit efficiency regardless of a simple circuit structure and shortened in non-lighting period in one cycle of an AC voltage. <P>SOLUTION: The light emitting device is connected with an AC power source AC to light a plurality of solid light emitting elements L1, L2 and includes a first lighting circuit lighting a first light emitting portion 1 constituted of the solid light emitting element L1 with a current which is almost in phase with an AC supply voltage, and a second lighting circuit lighting a second light emitting portion 2 constituted of the solid light emitting element L2 with a current which is out of phase with the AC supply voltage. The first lighting circuit is a circuit for full-wave rectifying the AC voltage to supply a voltage to a series circuit of the solid light emitting element L1 and a current control element R1 and the second lighting circuit is a circuit element for phase-converting and full-wave rectifying the AC voltage by the series circuit of a current phase conversion element C1 and a full-wave rectifying element DB2 to supply a voltage to a series circuit of the solid light emitting element L2 and the current control element R2. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
