| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED lighting device capable of changing light distribution characteristics rapidly while realizing energy saving with the use of LEDs as compared with an incandescent lamp or the like. <P>SOLUTION: When power is supplied to an actuator ACT, a driving shaft ACTa is elongated and contracted, so that a protruded part FL coupled to the driving shaft ACTa as well as a lens LS is displaced toward an optical axis direction and stops at a predetermined position. With this, a distance between an LED chip CP and the lens LS is changed, so that light distribution characteristics of a white LED light source are changed in accordance with the position of the optical axis direction of the lens LS. <P>COPYRIGHT: (C)2011,JPO&INPIT |
