Patent ID: 9552778
Date: 2017-01-24
CPC Classifications: G09G,H04N

Claim:
1. A method for controlling a digital device, the method comprising: receiving content; displaying the received content on a display screen of the digital device; calculating, via a controller of the digital device, an average luminance value respective to an entire display screen where the received content is displayed; generating, via the controller, a histogram respective to a partial area of the entire display screen; analyzing, via the controller, the histogram respective to the partial area and verifying whether or not a pixel distribution ratio of pixels having a minimum gray level, among pixels being located in the partial area of the display screen, is equal to or greater than a reference ratio; and if the pixel distribution ratio of pixels having the minimum gray level is equal to or greater than the reference ratio, processing a luminance of the partial area of the display screen to be black, wherein the display screen includes a center portion having a flat surface and a first and second edge portions having a curved surface which is located on side edges of the center portion, and wherein the method further comprises controlling, via the controller, the luminance of the first and second edge portions based on the histogram including the pixel distribution ratio of pixels having the minimum gray level in the first and second edge portions having the curved surface.