Extreme Teardown of a Panasonic PT-L780U 3LCD Projector

[johnlsenchak]

Extreme Teardown of a Panasonic PT-L780U 3LCD Projector
Kerry Wong
Published on Sep 9, 2018

In this video I did an extreme tear down of a PT-780U projector and found the optical components quite fascinating.

[tom66]

Nice video and teardown.

One of the things that fascinates me about LCD projectors is the power dissipation in the LCD panels themselves.  How well do they cope with displaying black if a panel has to dissipate ~10W of optical flux, blocking all of one channel?  Obviously these ones lasted fine, but I have seen some Sony 3LCD projectors fail with "blobs" on the image, possibly due to the LC becoming damaged over time. 



Needless to say this technology lost out to DLP, possibly because of this issue.  In DLP, the power is easier to dissipate because it is usually dumped onto a heatsink, external to the DMD chip.