Display device, picture adjusting method and equipment

The invention discloses a display device, a picture adjusting method and equipment. The display device comprises a display panel, a control module, a gamma module, a current source module and a pulse width modulation (PWM) module. The control module sends a current temperature value, a current current value and a current brightness value to the gamma module; the gamma module calculates a target current value based on the current current value and the current temperature value and sends the target current value to the current source module; determining a current gray-scale value based on the current temperature value and the current brightness value; calculating a target gray-scale value based on the current gray-scale value and the current temperature value, and sending the target gray-scale value to a PWM module; the current source module outputs current based on the target current value; and the PWM module outputs a PWM signal based on the target gray-scale value. According to the invention, the gray scale is corrected through the PWM signal so as to maintain the stability of the brightness, and the light-emitting wavelength is changed through the output current so as to maintain the stability of the wavelength. Therefore, the color temperature change caused by the temperature change is improved.