| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the necessity of providing a power generation circuit in addition to a liquid crystal display(LCD) pannel in which another power generation circuit is incorporated by providing such an LCD pannel, and supplying a voltage generated at the circuit to a drive circuit. SOLUTION: In an active matrix type LCD, a negative power generation circuit 22 is integrally formed on an LCD pannel 21 by using a polysilicon thin film transistor. The circuit 22 is incorporated to supply a generated negative power voltage to a drive circuit, e.g. a vertical driver 20. The circuit 22 generates the negative power voltage according to a horizontal clock HCK with the HCK to be inputted to a horizontal driver 19 inputted thereto, and the voltage is supplied to a second negative side power line at an output stage of the vertical driver 20.
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