| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bicycle backlight driving circuit for suppressing a variation in the quantity of a backlight independently of a change in the voltage of a power supply. <P>SOLUTION: The backlight driving circuit 24c for driving the backlight 24b of a liquid crystal display device to be mounted on a bicycle with power from the power supply whose voltage is changed comprises a current supply circuit 50 and a current limiting circuit 51. The current supply circuit 50 supplies a DC current from the power supply to the backlight 24b. The current limiting circuit 51 limits a current to be supplied to the backlight 24b at an almost constant value when the voltage being changed is kept at the minimum value or more. <P>COPYRIGHT: (C)2004,JPO</p> |
