Abstract: A voltage compensation circuit and an operation method thereof are provided. The voltage compensation circuit is suitable for a display device. The display device includes a direct-current voltage converter, a voltage level shifter, a panel, and a gate driving circuit. The voltage compensation circuit includes a voltage divider providing a divided voltage form a gate pulse signal, a comparing unit, a time counting unit and a processing unit. The comparing unit receives the divided voltage to provide at least one comparison result. The time counting unit provides a plurality of timing control signals at different time points according to the divided voltage. The processing unit provides a voltage reference signal to the direct-current voltage converter according to the plurality of timing control signals and the comparing result, and accordingly, the direct-current voltage converter adjusts an output voltage relating to the gate driving circuit.

Abstract: A reference voltage generator of a gate driving circuit is provided. The reference voltage generator includes a temperature sensing unit, a level clamp unit, a gain adjusting unit and a computing circuit. The temperature sensing unit generates a temperature sensing voltage in response to an environmental temperature. The level clamp unit is coupled to the temperature sensing unit and providing a difference signal in response to the temperature sensing voltage. The gain adjusting unit is used to provide a temperature compensating gain and a first reference level. The gain adjusting unit adjusts the temperature compensating gain and the first reference level according to a control command. The computing circuit is coupled to the level clamp unit and the gain adjusting unit to provide a reference voltage in response to the temperature compensating gain, the first reference level and the difference signal.

Abstract: A voltage compensation circuit and an operation method thereof are provided. The voltage compensation circuit is suitable for a display device. The display device includes a direct-current voltage converter, a voltage level shifter, a panel, and a gate driving circuit. The voltage compensation circuit includes a voltage divider providing a divided voltage form a gate pulse signal, a comparing unit, a time counting unit and a processing unit. The comparing unit receives the divided voltage to provide at least one comparison result. The time counting unit provides a plurality of timing control signals at different time points according to the divided voltage. The processing unit provides a voltage reference signal to the direct-current voltage converter according to the plurality of timing control signals and the comparing result, and accordingly, the direct-current voltage converter adjusts an output voltage relating to the gate driving circuit.