LED driving circuit and LED display device

The invention discloses an LED driving circuit, and the circuit comprises an LED control circuit which is used for converting a first PWM signal, a first DAC signal, and a Gamma signal into a second PWM signal and a second DAC signal; a constant current source which is used for supplying power to the target LED according to the second PWM signal; and a current type DAC which is used for converting the second DAC signal into a corresponding current signal and assisting the constant current source to supply power to the target LED by using the current signal. Obviously, compared with the prior art, due to the fact that the process of adjusting the depth of the second PWM signal for controlling the constant current source can be avoided through the LED driving circuit, energy consumed by the LED driving circuit can be remarkably reduced through the arrangement mode, and the purpose of adjusting the luminous efficiency of the LED can be achieved through the LED driving circuit. 本申请公开了一种LED驱动电路，包括：LED控制电路，用于将第一PWM