Voltage control circuit and method, panel and display apparatus

A voltage control circuit, comprising:

• a comparison circuit, configured to compare a first voltage with a second voltage, output a first signal in a case where a difference between the first voltage and the second voltage exceeds a thresholds range, and output a second signal in a case where the difference between the first voltage and the second voltage is within the thresholds range;
• a compensation circuit, coupled to the comparison circuit, and configured to compensate the first voltage in response to the first signal output by the comparison circuit, wherein the comparison circuit comprises a first input terminal configured to input the first voltage and a second input terminal configured to input the second voltage;
• an input terminal of the compensation circuit is coupled to an output terminal of the comparison circuit, and an output terminal of the compensation circuit is coupled to the first input terminal;
• and
• a latch circuit, coupled to the comparison circuit and the compensation circuit, and configured to latch the first voltage in response to the second signal output by the comparison circuit, wherein the latch circuit comprises a third input terminal coupled to the first input terminal and a fourth input terminal coupled to the output terminal of the comparison circuit,
• wherein the compensation circuit comprises a first switch circuit and a compensation component;
• the first switch circuit is coupled to the output terminal of the comparison circuit and configured to trigger the compensation component to compensate the first voltage in response to the first signal output by the comparison circuit,
• the first switch circuit comprises a first switch transistor, a control electrode of the first switch transistor is coupled to the output terminal of the comparison circuit, a first electrode of the first switch transistor is coupled to the compensation component, and a second electrode of the first switch transistor is grounded, and
• the compensation component comprises a counting circuit, a voltage dividing circuit and a compensation sub-circuit;
• the counting circuit is coupled to the first switch circuit, and the first switch circuit is configured to trigger the counting circuit to count a number of times of compensation in response to the first signal output by the comparison circuit;
• the voltage dividing circuit is coupled to the counting circuit, and configured to output a corresponding compensation voltage according to the number of times of compensation;
• and the compensation sub-circuit is respectively coupled to an output terminal of the voltage dividing circuit, the first input terminal of the comparison circuit, and the third input terminal of the latch circuit, and configured to compensate the first voltage based on the compensation voltage output by the voltage dividing circuit.