Active technology

This technology uses liquid crystal cells (LCC) which just play the role of fast shutter. Each LCC is synchronized on the image corresponding to its eye through Infra Red (IR) synchronization. An active 3D glass can be divided into two different parts:

 An electronic device to detect the IR signal and to drive the LCC to switch them between a clear state and a black state and vice-versa.

 The LCC which are fast shutters and ensure the 3D vision. The LCC have to react quickly and must have a clear state and a black state with a high quality.

In order to ensure a perfect synchronization with the images, an IR emitter is synchronized with the projector and emits two different IR frames for the left and the right images. Then, the 3D glasses are able to differentiate the two frames and switch the LCC in a good way.

This technology doesn’t require a metallic screen and is one of the most qualitative technologies on the market. Several types of active glasses currently exist and their quality is variable depending on the performance of the LCC used.