Patent ID: 8754879

Claim:
A power circuit device which drives a backlight included in a display apparatus, comprising: a transforming unit which comprises a primary coil which receives an input current, a secondary main coil which outputs a first output current and a secondary auxiliary coil which outputs a second output current; a first switching unit which switches to allow the input current to be selectively input; a first switch control unit which controls the first switching unit so that an operation voltage of the display apparatus reaches a first target value; a second switching unit which switches to allow the second output current to be selectively output; a backlight driving unit which drives the backlight based on the second output current; and a second switch control unit which controls the second switching unit so that a driving voltage of the backlight reaches a second target value and that the second switching unit is turned on or off at a timing corresponding to change in an output voltage of the secondary main coil.