Gray-scale voltage generation circuit and control method thereof, driving circuit, and display apparatus

The invention provides a gray-scale voltage generation circuit and a control method thereof, a driving circuit, and a display apparatus. The gray-scale voltage generation circuit comprises a reference voltage input end used for receiving input reference voltages and transmitting the reference voltages to a resistance conversion circuit; the resistance conversion circuit used for, according to first control signals of received pixel data, performing voltage division on the reference voltages to obtain first simulation voltages and second simulation voltages; and a capacitance conversion circuit used for controlling the first simulation voltages or the second simulation voltages to respectively charge multiple capacitors according to second control signals corresponding to the pixel data in a first time period, and in a second time period, cutting off the first simulation voltages and the second simulation voltages and controlling the multiple capacitors to discharge so as to obtain gray-scale voltages corresponding to the pixel data. The circuit provided by the invention can realize output of 255 gray-scale voltages, the chip occupied area is quite small, and the power consumption is quite small.