| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit for setting up common voltage and a method therefor for reducing the generation of errors. SOLUTION: The circuit for setting up common voltage to be used for a display panel 113 is provided with a voltage dividing circuit 120, a coupler 109, a switch 111, and a test module 117. The voltage dividing circuit 120 divides an inputted DC bias according to a voltage dividing ratio and outputs common voltage. The coupler 109 has a positive input terminal for inputting the common voltage outputted from the voltage dividing circuit 120 and an output terminal of the coupler 109 and a negative input terminal are mutually connected. The switch 111 determines whether the common voltage outputted from the coupler 109 is to be sent to a display panel 113 or not in accordance with a control signal. The test module 117 sends constant voltage to all data lines in the display panel 113, fixes the scanning signal period of the display panel 113 and the switching ratio of a frame and measures the kickback voltage of the display panel 113. COPYRIGHT: (C)2007,JPO&INPIT
|
