Enabling Concurrent Dual Views on Common LCD Screens

Can your laptop show you two different views simultaneously?

The answer is yes and here is how. Twisted Nematic (TN) is the most widely used LCD technology today, especially on laptop screens. Some color combinations may become indistinguishable when viewed at a certain angle. Exploiting this, we can hide and show information at different angles without special hardware. Two completely different images can be shown at different viewing angles by spatial multiplexing or by temporal multiplexing. Our method works across various TN-based LCD screens. Similarly, two movies or video games can be played simultaneously for different viewing angles, allowing people to watch different programs or play video games with personalized views.

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