Originally Posted by tgm1024
^^^Good idea, however keep in mind that IME, your guests are not as likely to get headaches from active. YMMV on this of course, but I've never had a negative feedback from this. Even an 89 year old loved it. (Sony KDL-60R550A).
That, and the glasses are very inexpensive and never need charging. I have a dozen and have the neighborhood kids over from time to time. So cute to watch them reaching out in mid-air.
I'm sure that's a typo. Tgm must have meant to write passive
. [The Sony KDL-60R550A is a passive 3D set.]
Originally Posted by aaronwt
I've definitely has issues from passive. I'm much more likely to get a headache from home passive 3D than Active. I haven't had issues with theatrical 3D though.
I can wear the active glasses for my DLP set for many hours without a problem. But with my passive set my eyes feel very fatigued after an hour or two.
With an LED display that uses a film-type patterned retarder (to provide the Left and Right views on alternate lines for people wearing passive glasses) it is important to have the display screen at a compatible height (and angle, if the display is tilted) for the intended viewing position, so as to minimize ghosting. If that is done then the passive 3D should be calm and soothing compared with 120Hz active glasses 3D from a plasma or LED display. That is the usual, reported, experience.
4k passive sets provide an even better 3D experience than Full HD passive sets as the horizontal lines are so dense that the pattern of black horizontal lines that can be visible at closer viewing distances with a full HD 3D passive set when wearing 3D glasses, becomes invisible or negligible.
Active glasses DLP is a different technology to plasma or LED active 3D and can provide extremely low ghosting, potentially reducing viewer discomfort. However with most home DLP projectors the alternation rate for Blu-ray 24fps 3D material has been at only 120Hz, potentially a fatiguing alternation rate for a viewer, and not as smooth to watch as the 144Hz alternation rate used at a RealD public cinema (or by 144Hz 3D DLP projectors such as the BenQ W1070). Another factor coming into play is that projectors are usually watched in a dark room, and project low light levels, tending to reduce eye fatigue from alternation between the Left and Right views, all other things being equal. On the other hand, the large image size of a projector can exacerbate how noticeable the out of phase effect between presentation of the Left and Right views is for a 120Hz alternation rate.