Gamma voltage generating circuit, driver circuit and display device

A gamma voltage generating circuit, comprising N gamma voltage generating sub-circuits, wherein N is greater than or equal to 2;

• each gamma voltage generating sub-circuit includes:
• a plurality of gamma reference voltage output terminals;
• and
• a resistive voltage divider circuit, including a plurality of resistors connected in series, one of the plurality of resistors being connected between every two adjacent gamma reference voltage output terminals, wherein any two of N resistive voltage divider circuits have a same resistance ratio of the plurality of resistors connected in series,
• the N gamma voltage generating sub-circuits include a first gamma voltage generating sub-circuit, and the first gamma voltage generating sub-circuit further includes:
• a gamma voltage generation circuit, output terminals of the gamma voltage generation circuit being electrically connected to a highest gamma reference voltage output terminal and a lowest gamma reference voltage output terminal in the plurality of gamma reference voltage output terminals of the first gamma voltage generating sub-circuit, respectively;
• and
• first control switches, the first control switches being respectively disposed between an output terminal of the gamma voltage generation circuit and the highest gamma reference voltage output terminal, and between another output terminal of the gamma voltage generation circuit and the lowest gamma reference voltage output terminal, and the first control switches being configured to connect or disconnect the output terminal of the gamma voltage generation circuit and the highest gamma reference voltage output terminal, and to connect or disconnect the another output terminal of the gamma voltage generation circuit and the lowest gamma reference voltage output terminal,
• wherein highest gamma reference voltage output terminals of the N gamma voltage generating sub-circuits are connected, and lowest gamma reference voltage output terminals of the N gamma voltage generating sub-circuits are connected.