Active vs. Passive? What Cinema 3D from LG Can Offer You
Presently, the only manufacturer to offer ‘passive’ and ‘active’ 3D viewing options is LG.
Whilst both options are available through the brand, following a year’s experience of retailing their 3D technology, and an additional survey, it has been found that 88% of consumers prefer the passive Cinema 3D experience to the active 3D.
What is Cinema 3D?
Cinema 3D is so called because it is considered the closest you will get to the 3D you experience within the cinema, yet within your own home.
LG’s range of Cinema 3D TVs are designed with LG’s exclusive FPR, i.e. Film-type Patterned Retarder panel.
The FPR panel optimises the separation of images into an image for the left eye and another for the right. These two images are ‘filtered’ through the Cinema 3D glasses to create a 3D viewing experience.
What is ‘active’ 3D?
Active 3D is viewing via active-shutter glasses.
These glassesare – in short – small LCD screens that alternate between each lens, dimming the left and right in succession. Relying on an infrared signal emitter coming from the 3D TV, it is instructed as to when to dim each lens from the TV.
Due to the complicated technology involved with active-shutter glasses, their price tag duely reflects this. Typically priced at around $150, and work only with 3D TVs made by the same manufacturer – they also rely on batteries.
As a result, the batteries make them rather heavy, so if watching a two-hour mov,ie it can be somewhat uncomfortable; not helped if you have to also wear prescription glasses beneath.
What is ‘passive’ 3D?
Passive 3D glasses are specially designed polarised glasses.
Polarised 3D glasses block dissimilar kinds of light from each eye, creating the illusion of depth. As a result, such intricate technology – as seen in ‘active-shutter glasses’ above, is not required to create the 3D effect. In turn, this limits expense.
However, as each lens is ultimately blocking out light, you’re not getting to experience the full 1080p image for each eye – yet, your brain should be identifying a 1080p image when it puts the two images together.
About the Author: Barry Knightly is a writer and fan of the brand LG
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