System for protecting unauthorized reading of sensitive content e.g. confidential electronic-mail, on screen of e.g. laptop in public sector, has control unit that is provided to perform synchronized control of filter of eyeglass

摘要

The system has a computer (R) that sends the synchronizing signal (Sync) by a transmitter (S). The presentation of the image content (BI) on the screen (D) is changed, so that the image content is illegible for an unauthorized user without the corresponding filter glasses (B). The filter eyeglass is equipped with a user-side receiver for receiving synchronization signal from the computer. A control unit is provided to perform synchronized control of a filter (F) of the eyeglass. The synchronization signal represents an infrared signal.