Patent ID: 9641725
Date: 2017-05-02
CPC Classifications: G06T,H04N,H05B,Y02B

Claim:
1. A method for preventing pirates from copying video content displayed on a screen in a display space by impeding an optical recording device from making a non-disturbed copy of the displayed video content, the method comprising the steps of: displaying the video content on the screen, wherein the video content comprises a plurality of images to be displayed sequentially, and illuminating indirectly the screen with ambience light of an ambience light source, wherein the ambience light source is configured to illuminate a non-screen part of the display space, wherein the ambience light comprises light having a wavelength greater than 380 nm and less than 750 nm, wherein the ambience light is controlled as function of the video content, the ambience light comprising one or more colors determined on one or more average colors of one or more sub-sections of an image or wherein the ambience light comprises one or more colors determined on one or more average colors of one or more sub-sections of a plurality of subsequent images, and wherein the ambience light is intensity-modulated with an intensity modulation frequency selected from the range of 40 Hz to 500 Hz.