Abstract: An apparatus and a method for detecting a motor rotor position are provided. The method for detecting a motor rotor position includes: transmitting test current commands and preset angles to a field oriented control circuit before a motor rotor rotates, to enable the field oriented control circuit to generate feedback currents, determining current peaks of the feedback currents, and comparing the current peaks of the feedback currents, and when determining that a current peak of a feedback current with a largest current peak in the feedback currents is greater than a current peak of another feedback current, outputting, according to a largest current peak current command corresponding to the feedback current with the largest current peak, a preset angle corresponding to the largest current peak current command as an initial angle position of the motor rotor.

Abstract: The present disclosure relates to an interface display method, the method comprising: generating a first screen interface and a second screen interface, wherein the first screen interface displays a functional interface associated with an application, and the second screen interface displays a navigation interface comprising functional modules associated with the application; displaying the first screen interface; displaying the second screen interface when the second screen interface is triggered; and displaying an interface associated with a functional module in the first screen interface when the functional module is selected from the second screen interface. This interface display method accomplishes convenient switching between functional modules without occupying screen display space. The present disclosure also provides an interface display device.