| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make a light emitting element emit light more suitably in a light-emitting-element driving circuit. <P>SOLUTION: The light-emitting-element driving circuit includes a light-emitting circuit unit in which a plurality of current paths in each of which a light-emitting element and a first switching element are connected in series are placed in parallel with each other between a power supply terminal connected to an input power supply and a common terminal, a common circuit unit in which a second switching element and a constant current source which supplies a predetermined current which is defined in advance are connected in series and which is placed between the common terminal and a ground terminal which is grounded, and a plurality of third switching elements each of which is placed between an anode terminal of each light-emitting element of the light-emitting circuit unit and ground, wherein a switching control is applied for the first switching elements, the second switching element, and the third switching elements. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
