| 摘要 |
A liquid crystal driving power supply has serially connected resistors R1~R5 that divide a DC output voltage VOUT 2, and outputs the divided voltages through voltage followers 131~134 as output voltages V1~V4 to drivers of a liquid crystal display apparatus. Both ends of the resistor R3 are connected to adjusting terminals 27 and 28 that are connectable to an external adjusting resistor R0, such as a variable resistor, for finely adjusting the brightness of a display screen of the liquid crystal display apparatus. When the adjusting resistor R0 is a variable resistor, the resistance value of the resistor R3 can be finely adjusted such that the divided voltages can be finely adjusted and the brightness of the display screen of the liquid crystal display apparatus.
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