| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance stability of light for irradiating a solar simulator. <P>SOLUTION: In a light volume control circuit 2 used to control light intensity of a lamp 10 on the solar simulator having the lamp 10 and a main power supply 32 for supplying drive power to the lamp 10, the light volume control circuit 2 includes a driver section 38 connected in parallel with a power supply path for connecting between the power supply and the lamp, light detection means 34, 35 for generating light volume signals based on the light intensity by detecting light intensity of the lamp, and a driver control circuit 40 for supplying a control signal to the driver section on the basis of the light volume signal. The light intensity of the lamp can be stabilized by increasing and decreasing current pulled in the driver section from the power supply path in response to the control signal. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
