| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrosymmetric gamma voltage calibration circuit. SOLUTION: This circuit is applied to the display circuit of a liquid crystal display, and adjusts a gamma calibration voltage effectively and satisfactorily by the installation of one resistance voltage dividing circuit and one drive circuit. A gamma calibration voltage value is controlled by an input voltage from the outside, and the number of amplifiers necessary in the circuit and necessary calibration voltages inputted from the outside is reduced. A combination of a plurality of resistances, variable resistances and amplifiers is used together in the resistance voltage dividing circuit and the drive circuit, and the number of calibration voltages required to be inputted from the outside and the necessary number of amplifiers to be used are reduced.
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