| 摘要 |
PURPOSE: A circuit for driving a liquid crystal module is provided to supply a circuit for driving a liquid crystal module for the aging test to display the black or white pattern on a liquid crystal panel with an interval of the fixed time. CONSTITUTION: A circuit for driving a liquid crystal module includes a few portions(10-80). A power supplying portion(10) inputs the external voltage of 12B and generates the internal power. A clock generating portion(20) outputs the clock signal(CLK), which has the frequency of 40MHz. A driving signal generating portion(30) inputs the clock signal of 40MHz and generates the data enable signal of 800CLK and the vertical synchronous signal and the driving signal of 600H. An output signal selecting portion(40) outputs the data enable signal of 800CLK and the vertical synchronous signal and the driving signal of 600H selectively. A portion(50) for detecting the operation and state of a circuit inputs the internal voltage of 5V and detects the normal operation and state of the driving circuit. A power voltage selecting portion(60) inputs the internal voltage of 5V and the external voltage of 12B and outputs the internal voltage of 0V in driving of a liquid crystal module and outputs the external voltage of 12B in pattern displaying. A pattern selecting portion(70) selects the black pattern or the black/white pattern. An output step(80) outputs the driving signal, power voltage, the pattern selecting signal, the clock signal and the circuit operation and state detecting signal.
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