Patent ID: 11924519
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 9:
10. A method of controlling a display device coupled to a settop box and including a transceiver configured to communicate to and receive communication from an external device and the settop box, the method comprising:
displaying, by a display of the display device, a content included in a broadcast signal received from the settop box at a screen;
controlling the display to decrease a brightness of the display from a default brightness value to a first brightness value for a first brightness decrease time based on a brightness of a fixed region of a whole display region being maintained at a brightness level that exceeds a prescribed brightness over a first prescribed time, wherein a fixed content received from the settop box is continuously displayed at the fixed region over the first prescribed time;
controlling the display to increase the brightness of the display from the first brightness value to the default brightness value based on a first signal being received at the settop box from the external device within a second prescribed time, the first signal requesting changing of the screen from a first screen comprising a settop box menu screen to a second screen comprising a live screen from the external device; and
controlling the display to decrease the brightness of the display from the first brightness value to a second brightness value for a second brightness decrease time based on the brightness of the fixed region being maintained over the second prescribed time while the first signal is not received at the settop box from the external device.