The present disclosure relates to a display device, a light-emitting control signal generating device and method. The generation device includes: a two-to-two multiplexer, configured to select the first input signal to be output from a first output terminal of the two-to-two multiplexer according to the first control signal, or select the second input signal to be output from a second output terminal of the two-to-two multiplexer according to the first control signal; a first operational amplifier, configured to receive the first input signal and output a first output signal; a second operational amplifier, configured to receive the second input signal and output a second output signal; and a three-to-one multiplexer, configured to receive the first output signal, an intermediate signal and the second output signal, and select one of them to be output as a light-emitting control signal according to a second control signal.