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LCD's and ventilation

D

Da Frechman

Limp Gawd
Joined
Feb 21, 2005
Messages
175
Do lcd's require ventilation?

I've been thinking what if someone built their very large lcd screen (40” plus) into a wall. It'd be protected with a plexiglass/real glass front and could be hidden behind a split mirror (perhaps scribed with an image) which opens with a click of the remote. Speakers and what-not could also be hidden.
 
LCD's put out roughly 1/4 the heat that a typical CRT does, mostly from the backlighting system and invertor board. Some ventilation would be neccessary to keep the operating temps within specced range but no where near as bad as say a plasma, they get as hot as the freaking sun.
 
Considerably hotter then I thought, could be a nightmare for dust and cleaning.

thanks for the quick reply.
 
IceWind said:
LCD's put out roughly 1/4 the heat that a typical CRT does, mostly from the backlighting system and invertor board.
Click to expand...

that seems like quite a broad statement

My dad's 19" lcd has a peak consumption listed of around 40 watts. My 26" lcd lists 120 watts as the peak.
 
needmorecarnitine said:
that seems like quite a broad statement

My dad's 19" lcd has a peak consumption listed of around 40 watts. My 26" lcd lists 120 watts as the peak.
Click to expand...

19" vs 26" is a big difference in size so of course its going to put out more. My parents 42" Sony LCD projector cranks out alot of heat.

But if you want to safe, yes, ventilate your LCD's like any other electronic device that emits heat.
 
needmorecarnitine said:
that seems like quite a broad statement

My dad's 19" lcd has a peak consumption listed of around 40 watts. My 26" lcd lists 120 watts as the peak.
Click to expand...
That's why he said "roughly". It doesn't seem like much of a stretch to expect a 19-inch CRT to use 160 watts. 480 watts for a 26-inch monitor seems high, but not absurdly so.

I would expect an LCD installed the way you're asking about, Da Frechman, to require an exhaust with forced air to reduce heat build up. Just a strong 75mm fan pushing through three-inch hose should be enough, given a corresponding air inlet. If you know the specs of the panel you want to use, it shouldn't be hard to estimate what's specifically required.
 
needmorecarnitine said:
that seems like quite a broad statement

My dad's 19" lcd has a peak consumption listed of around 40 watts. My 26" lcd lists 120 watts as the peak.
Click to expand...

Is that 26" an lcd tv? If so then you need to include the tv tuner and the speakers. (if it has speakers) And peak power used is probably with volume cranked all the way up.


On Tomshardware's guide to making your own lcd projector (from an overhead projector and a 15" lcd) they comment that excessive heat (from the overhead projector's bulb) can cause the lcd's color to change somewhat.
 
MovieMan80 said:
Is that 26" an lcd tv? If so then you need to include the tv tuner and the speakers. (if it has speakers) And peak power used is probably with volume cranked all the way up.
Click to expand...

Yes it is. I assumed the 40" lcd he was talking about is also a tv
 
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