Set-voltage generation unit, set-voltage generation method and display device

A set-voltage generation unit comprising a voltage generation circuit;

• wherein an output terminal of the set-voltage generation unit is coupled with a pixel circuit;
• the set-voltage generation unit is configured to generate a set voltage according to a gamma main voltage such that a ratio between a variation of the set voltage and a variation of the gamma main voltage is a voltage coefficient K, and K is a positive number less than or equal to 1;
• wherein the voltage generation circuit includes an operational amplifier circuit and a voltage division circuit;
• the voltage division circuit is configured to divide the gamma main voltage to obtain a divided voltage, and input the divided voltage to a positive input terminal of the operational amplifier circuit;
• an inverting input terminal of the operational amplifier circuit is coupled with a reference voltage terminal;
• the operational amplifier circuit is configured to generate the set voltage according to the divided voltage and a reference voltage input by the reference voltage terminal.

A display device comprising:

• M rows and N columns of pixel circuits and N set-voltage generation units;
• wherein the set-voltage generation unit includes a voltage generation circuit;
• the set-voltage generation unit is configured to generate a set voltage according to a gamma main voltage such that a ratio between a variation of the set voltage and a variation of the gamma main voltage is a voltage coefficient K, and K is a positive number less than or equal to 1;
• an output terminal of an n-th set-voltage generation unit is coupled with pixel circuits in the n-th column, and is configured to provide the set voltage for the pixel circuits in the n-th column;
• wherein both M and N are integers greater than 1, n is a positive integer less than or equal to N;
• wherein the display device further comprises:
• N columns of detection lines, M rows of gate lines, N columns of data lines, M rows of compensation control lines and M rows of write control lines;
• wherein the gate line is configured to output a gate drive signal, the data line is configured to output a real-time data voltage, the compensation control line is configured to input a compensation control signal, and the write control line is configured to input a write control signal;
• a pixel circuit in an m-th row and an n-th column includes a light emitting element in the m-th row and the n-th column, a drive circuit in the m-th row and the n-th column, a display control circuit in the m-th row and the n-th column, a compensation control circuit in the m-th row and the n-th column, and a set-voltage write control circuit in the m-th row and the n-th column;
• a drive circuit in the m-th row and the n-th column is configured to, under control of a control terminal thereof, drive the light emitting element in the m-th row and the n-th column;
• a display control circuit in the m-th row and the n-th column is coupled with the control terminal of the drive circuit in the m-th row and the n-th column;
• and is configured to, under control of a gate drive signal output by a gate line in the m-th row, perform display driving control on the drive circuit in the m-th row and the n-th column according to a real-time data voltage of a data line in the n-th column;
• a compensation control circuit in the m-th row and the n-th column is configured to, under control of a compensation control signal input by a compensation control line in the m-th row, control a first terminal of the drive circuit in the m-th row and the n-th column to be coupled with a detection line in the n-th column;
• a set-voltage write control circuit in the m-th row and the n-th column is configured to, under control of a write control signal input by a write control line in the m-th row, control a set-voltage write terminal in the m-th row and the n-th column to be coupled with the detection line in the n-th column;
• an n-th set-voltage generation unit is configured to write a set voltage in the m-th row and the n-th column to the set-voltage write terminal in the m-th row and the n-th column, to control writing the set voltage in the m-th row and the n-th column to the detection line in the n-th column when the set-voltage write control circuit in the m-th row and the n-th column controls the set-voltage write terminal in the m-th row and the n-th column to be coupled with the detection line in the n-th column;
• wherein m is a positive integer less than or equal to M.