Patent ID: 11881758
Assignee: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 0:
1. A display device comprising:
a display;
a transformer configured to transform a commercial power and supply the transformed commercial power to the display and comprising a plurality of switching devices; and
a controller configured to:
control on or off of the plurality of switching devices based on a magnitude of an input voltage input to the transformer;
control at least one switching device to always turn off so that the transformer operates as a half bridge LLC converter in response to the magnitude of the input voltage exceeding a predetermined value;
determine a method for a modulation control of an output voltage of the transformer as one of changing modulation width of the plurality of switching devices or changing modulation frequency of the plurality of switching devices based on the magnitude of the input voltage; and
based on the determined method for the modulation control, perform the modulation control of the output voltage of the transformer so that the output voltage of the transformer follows a predetermined reference voltage.