A display panel and a display device are provided. The display panel includes pixel units arranged in an array, scan signal lines, data signal lines, and pulse width modulation signal lines. Each scan signal line is coupled to a row of the pixel units and outputs a scan signal to the pixel units. Each data signal line is coupled to a column of the pixel units and outputs a data signal to the pixel unit. Each pulse width modulation signal line is coupled to a row of the pixel units and outputs a pulse width modulation signal to the pixel unit and controls lighting time of the pixel unit to achieve different gray levels. The display panel can achieve low brightness driving display and avoid occurrence of excessive brightness caused by excessive current of the light emitting element.