[PhilB]

After doing a cursory search of the forum, I couldn't find a direct answer to this question. So, for the D-ILA experts out there, why do the projectors run so hot. Is it simply a matter of JVC shooting for high light output, or is there something about the technology that requires the hot lamps?


It seems to me that heat (and thus noise) is the one thing holding these projectors back from taking over the digital proj home market (assuming cost follows Moore's law).


-phil

 

[kevin gilmore]

To get better red output jvc uses a cermax xenon short

arc. Of the 420 watts (or 500) the bulb consumes only

60 to 70 watts are light, the rest is heat.


The UHP bulbs are typically 200 watts about 50 of which

are actually light.


So it is the difference between 150 watts of heat and about

350. That is a substantial difference.

 

[PhilB]

I guess that's why bulb costs are so high for the D-ILA. Thanks for the info Kevin. Once again it all comes down to trade offs. Better color, more heat.


At least the heat is not a requirement of the technology.


As a follow-up question. Any idea why other manufacturers haven't picked up D-ILA and used a cheaper/cooler bulb?


-phil


[This message has been edited by PhilB (edited 08-24-2001).]

 

[robena]

They have, here .

But I have not yet seen any review of this one.



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Robert