A backlight module and a display module are provided. The light intensity control unit controls the light intensity in the order of reception of plural operations received by the operation unit from the user. The sensor assembly is fixedly attached to the laser nozzle assembly and moves with the laser nozzle assembly. The processing device may identify a mirror relationship between the protected memory address and an unprotected memory address and copy the data value from the protected memory address to the unprotected memory address. The display of the icon may indicate, to the user, whether a device, associated with the icon, is in an energy-saving mode. The input of the first inverter is coupled to the output of the second inverter by a Schottky-diode-free MOSFET.