| 摘要 |
PROBLEM TO BE SOLVED: To execute a power supply breaking control by following a power supply control sequence fixed beforehand, without breaking an IC for driving a liquid crystal display device and without deterioration of an LCD panel, even at the time of primary-side power supply breaking. SOLUTION: When a power supply voltage of a digital power supply supplied to a liquid crystal driving circuit becomes lower than a prescribed value at the time of power supply breaking, an impedance of an analog power supply system is controlled to be lowered by using a switch (impedance control means) 18 for controlling the impedance of the analog power supply system supplied to the liquid crystal driving circuit.
|
