Lamps in LCD flat panels? - Blu-ray Forum

Anhslaught · 08-22-2008, 09:28 AM

I was under the impression that even the new FLat Panel LCDs have lamps but someone told me it doesn't and that it is no longer rear projected like those old rear projection LCDs. so it does not need a lamp. Is he right? If so, how come I keep hearing about the lamp life of my TV?

And....those old rear projected LCDs, are those considered DLPs now? I kind of thought they were different technology but apparently I'm wrong. Anyhow, just curious. Thanks

Johk · 08-22-2008, 05:22 PM

Quote:

Originally Posted by Anhslaught

I was under the impression that even the new FLat Panel LCDs have lamps but someone told me it doesn't and that it is no longer rear projected like those old rear projection LCDs. so it does not need a lamp. Is he right? If so, how come I keep hearing about the lamp life of my TV?

And....those old rear projected LCDs, are those considered DLPs now? I kind of thought they were different technology but apparently I'm wrong. Anyhow, just curious. Thanks

LCD panel have a backlight (and some newer ones have LEDs). They need a source of light behind the liquid crystals to have a picture.

MaleManGuy · 08-22-2008, 06:28 PM

Usually a cold cathode flourescent tube too. CCFL. They also tend to talk about how pure a white this CCFL can produce as well... because if you can't produce a pure white no other colors will be as accurate either... or more difficult to keep accurate. LCD starts with pure white... and then subtracts Blue & Green to give you red for example.
Plasma on the other hand... just adds R G B to give you white... it's easier.

Jeff

clyon · 08-22-2008, 06:38 PM

The lamp does NOT have to be replaced like in RPtv.

No LCD rptv's are a diffrent technology then DLP & SXRD

Anhslaught · 08-22-2008, 09:05 PM

Ah gotcha. That cleared things up a lot. Thanks.

08-22-2008, 09:28 AM	#1
Anhslaught Member Member since:Nov 2007 Blu-ray collection:105	Lamps in LCD flat panels? I was under the impression that even the new FLat Panel LCDs have lamps but someone told me it doesn't and that it is no longer rear projected like those old rear projection LCDs. so it does not need a lamp. Is he right? If so, how come I keep hearing about the lamp life of my TV? And....those old rear projected LCDs, are those considered DLPs now? I kind of thought they were different technology but apparently I'm wrong. Anyhow, just curious. Thanks

08-22-2008, 06:28 PM	#3
MaleManGuy Active Member Member since:Sep 2007	Yup... Usually a cold cathode flourescent tube too. CCFL. They also tend to talk about how pure a white this CCFL can produce as well... because if you can't produce a pure white no other colors will be as accurate either... or more difficult to keep accurate. LCD starts with pure white... and then subtracts Blue & Green to give you red for example. Plasma on the other hand... just adds R G B to give you white... it's easier. Jeff

Similar Threads
thread	Forum	Thread Starter	Replies	Last Post
Five low cost $1,500 and under 1080P Flat Panels Face off HEAD TO HEAD	Display Theory and Discussion	HDTV1080P	11	09-03-2009 11:45 AM
Four High-end 1080P Flat Panels Face off HEAD TO HEAD(Feb 2009 Home Theater Magazine)	Display Theory and Discussion	HDTV1080P	9	05-07-2009 01:53 PM
HD Guru alert - price of flat panels to drop considerably throughout May	Display Theory and Discussion	dobyblue	11	05-22-2008 05:39 PM
Toshiba has now discontinued all rear projection displays in favor of flat panels.	Home Theater General Discussion	HDTV1080P	6	07-03-2007 03:43 AM
1.3 HDMI Flat Panels??	Home Theater General Discussion	BLu-Balls	14	06-06-2007 04:11 PM

08-22-2008, 06:38 PM	#4
clyon Special Member Member since:Feb 2007 Location:Just left of the Alpha Quadrant 4K collection:57 Blu-ray collection:824 Blu-ray reviews:8	The lamp does NOT have to be replaced like in RPtv. No LCD rptv's are a diffrent technology then DLP & SXRD

08-22-2008, 09:05 PM	#5
Anhslaught Member Member since:Nov 2007 Blu-ray collection:105	Ah gotcha. That cleared things up a lot. Thanks.

Best Blu-ray Movie Deals