| 摘要 |
PURPOSE: A liquid crystal display apparatus is provided to improve operating speed with a level converting circuit having small capacity transistor. CONSTITUTION: A liquid crystal display apparatus comprises a signaling circuit driving pixels of displaying unit, and a level converting circuit founded on a scanning circuit. The level converting circuit is composed of a first to a fourth transistor. Gates of the first and the second transistors are coupled to a first bias voltage source. Gates of the third and the fourth transistors are coupled to a second bias voltage source, and sources of the transistors are coupled to a power supply voltage source. Drains of the first and the second transistors are coupled to the drains of the third and the fourth transistors. Low amplitude signals having different polarity are inputted to the sources of the first and the second transistors, and high amplitude signals having different polarity are obtained from the drains of the first and the second transistors.
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