Patent ID: 11900005
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A video wall comprising:
a plurality of displays arranged adjacent to each other;
an image divider configured to divide an input image into a plurality of images for displaying on the plurality of displays; and
at least one controller configured to control a plurality of image display apparatuses corresponding to the plurality of displays,
wherein in response to a video including a plurality of frames having varied luminance being repeatedly played back on the plurality of image display apparatuses, the at least one controller is configured to extract a luminance value of each sub-pixel of the repeatedly played video during a first period of a repeated playback period, calculate an accumulated luminance value based on the extracted luminance value during the first period, and calculate a luminance compensation value based on the calculated accumulated luminance value during the first period, and the plurality of displays display the video based on the luminance compensation value during a second period following the first period,
wherein the luminance compensation value is inversely proportional to the varied luminance of the plurality of frames.