Central symmetric gamma voltage correction circuit

摘要

A central symmetric Gamma voltage correction circuit is mainly applied to the displaying circuit of liquid-crystal display. By installing a resistor voltage dividing circuit and a driving circuit so that a well adjustment way to the Gamma correction voltage can be acquired. Moreover, the value of the Gamma correction voltage is controlled by externally inputting voltage, and thus the number of external correction reference voltage input externally and the number of the amplifiers are reduced. The resistor voltage dividing circuit and driving circuit are formed by a plurality of resistors, adjustable resistors and amplifiers so as to achieve the object of reducing the number of externally inputting correction voltages and the number of amplifiers.