| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a color scroller capable of precisely controlling a motor by a control part without malfunction. <P>SOLUTION: The color scroller 1 is equipped with a film form color filter 3 to change the color of transmitted light by transmitting light from a light source, a pair of winding up shafts 4 and 5 capable of freely winding up the color filter 3, a pair of motors 6 and 7 to respectively rotate the winding up shafts 4 and 5 so as to wind up the color filter 3, a control part 10 which is connected to a signal forming device 9 to make a plurality of kinds of color designated signals formed by adjusting length of a supply period s of an alternate current electric power against a half cycle H of the alternate current power supply voltage by on-off operation of a switching element 8 and which controls operation of the pair of the motors 6 and 7 based on the color designated signal from the signal forming device 9, and pseudo load resister part 11 connected in parallel between the signal forming device 9 and the control part 10. <P>COPYRIGHT: (C)2008,JPO&INPIT |
