Reviews Of 3D Active Shutter Glasses
In this 3D shutter glasses review you will learn on the active glasses 3D technology, and why Shutter glasses are needed for the 3D display? The 3D TV projects two slightly different images one after the other, each intended for a different eye. The active shutter glasses are needed to make sure the correct image reaches the eye it is intended for. After the individual images being viewed by each eye and reach the brain visual center, the brain automatically puts these images together and interprets information as a three dimensional image.
What is Active 3D Glasses?
Active 3D shutter glasses are hi-tech eyewear which are usually powered by some energy source (batteries or rechargeable batteries) and have special crystal that reacts to the electric current. When the active glasses are used, the TV sends signals to the left and right glasses. The special crystal inside becomes blur with each electric signal.
When this is done 60 time a second, and fully syncronized with the TV each eye gets a different frame at each moment.
The 3D active glasses are like shutters opening and closing. They do it at an enormous speed synchronized by a wireless signal from the TV. The wireless signal (Blue-Tooth, Blu-Ray, Infrared or Radio) tells the 3D active shutter glasses when to open and close, In time with the alternating images on the TV itself.
The refresh rate of the TV will have the most important influence on the 3D movie effect it shows. This is why 3D Ready TVs have to have a minimum refresh rate of 120 Hz (meaning 60 frames per second for each eye).
Active Shutter Technology Pros and Cons
The main pros for the active glasses is that they allow to view 3D at home! The 3D effect of active shutter glasses is much more vivid than the red and cyan paper glasses we had in the cinema watching ‘Jaws in 3D’.
The 3D active shutter prices are getting lower each year. If in 2010 their price was sky high, you can get no-brand glasses for half the price. If the glasses are from the TV brand, than the 3D effect might be even better, as the sync will probably be 100%!.
Cons Of Active Shutter Glasses
The cons of active shutter glasses are that unlikely the way we all sit at home to watch TV, in order to view 3D content, we will need to sit with the 3D shutter glasses on our heads which is not the most comfortable solution..
Think of the situation where you watch 3D movie and want to press the remote control, or answer a phone call, or send text message. With Active glasses on your nose, it would be impossible..
Further more the constant shuttering may reduce the 3D fun for those who are sensitive to the flickering. This flickering effect can be felt with the TV that has a lower end 120 Hz displays which only provide an effective refresh rate of 60 Hz.
Another downside is that the 3D shutter glasses are battery powered. The active 3D glasses need extra power, to control the shutters and to communicate and sync with the TV. Think of the disappointment you might feel when running low on batteries while watching a movie at the most exciting scene..
The last thing to take into consideration when thinking to buy 3D active shutter glasses, is that as for today most shutter glasses of major companies are fit only to serve 3D for those companies HDTVs.. So when buying a new 3D HDTV, you may want to think of more active shutter glasses for the whole family or for times when your friends will come over to watch a 3D movie.