| 摘要 |
<P>PROBLEM TO BE SOLVED: To control a light-emitting element in at least first through third states by simply providing one control port in control means. <P>SOLUTION: A drive unit of a light-emitting element comprises an astable multivibrator 203 having an oscillation operation period set to a first period, and flickering a light-emitting element 214 with the first period by outputting a pulse signal of first period in a first state, and a microcomputer 201 which flickers the light-emitting element 214 with a second period by supplying a pulse signal of second period in a second state, and constantly lights the light-emitting element 214 by always supplying a low level signal in a third state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
