The following is a simplified description/example of how a liquid crystals lens works. In normal operation one lens will be open while the other lens is closed. In the ‘open’ state the viewer can see the video image on the screen and in the ‘closed’ state the view of the image on the screen is blocked. Thus each lens acts as a shutter that can either be open (i.e., transparent) or closed (i.e., opaque).
![dreamview 3d glasses dreamview 3d glasses](https://viewsonicglobal.com/public/products/243_1393343558-l-3.jpg)
Each liquid crystal panel alternates between a transparent state and an opaque state. These liquid crystal panels (lens) only require two states for their operation. Passive 3D glasses will be discussed in a future blog when compatible 3D projectors or projection systems are discussed.Įach lens of active shutter 3D glasses is actually a liquid crystal panel. Currently the only consumer projector that uses passive 3D glasses is the LG CF3D (there are some commercial and do-it-yourself dual projector configurations that also use passive 3D glasses). Most consumer 3D TVs and 3D projectors require the use of the more complex “active” shutter 3D glasses and this latter category is the subject of the discussion below.Īctive shutter glasses must be worn by the viewers in order to view the 3D video that is being projected by most consumer 3D projectors.
![dreamview 3d glasses dreamview 3d glasses](https://tomtop_au.guphotos.com/i/w?u=/images/V/4/V2984/V2984-1-c351-KmKh.jpg)
The simplest form is “passive” which use left and right lenses that either have a different fixed polarization or pass different portions of the light spectrum (e.g., different colors). For this blog I will be discussing 3D active shutter glasses.Īs touched upon in earlier blogs, there are basically two general categories of glasses used for viewing 3D video.