LED back lighting behind screen? - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 13 Old 03-10-12, 12:01 PM Thread Starter
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LED back lighting behind screen?

Is there any "advantage" to having LED or some other lighting from behind the screen as to giving the perception of better contrast during a movie?
I picked up some of these from Ikea and they can even change color. I already have the same but in warm white as under counter lighting in my kitchen for 5 years and are on 24/7 and have not burnt out.

Home theater:
Onkyo 805, Yamaha YDP2006EQ, Samson Servo 600 amp
3 EV Sentry 500 monitors across the front, 4 Mission 762i's Surrounds, SVS PB13U sub, Panasonic BDT220, Harmony 1100, Nintendo WiiU
Panasonic PT-AE8000 on a 120" 2,35:1 fixed screen

Living room system:
Sherwood/Newcastle R972, Mission 765's, SVS SBS02's, A/D/S MS3u sub, Yamaha YDG2030EQ
Yamaha KX-393 Tape deck, CDC 805 CD changer, Panasonic BD60, Sony turntable PS-T20
Panasonic TC-P50ST60, HD-PVR & WDTV Live, Harmony 900

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post #2 of 13 Old 03-10-12, 05:24 PM
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Re: LED back lighting behind screen?

Tony,

Behind the screen lighting is more of an effects lighting when other lights are on in the theatre..It won't give you better contrast projecting a movie..In fact the opposite..
The blacker the area around the screen, the better the contrast..

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post #3 of 13 Old 03-10-12, 05:25 PM Thread Starter
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Re: LED back lighting behind screen?

Thanks Prof, thats kind of what i thought, Looks cool though

Home theater:
Onkyo 805, Yamaha YDP2006EQ, Samson Servo 600 amp
3 EV Sentry 500 monitors across the front, 4 Mission 762i's Surrounds, SVS PB13U sub, Panasonic BDT220, Harmony 1100, Nintendo WiiU
Panasonic PT-AE8000 on a 120" 2,35:1 fixed screen

Living room system:
Sherwood/Newcastle R972, Mission 765's, SVS SBS02's, A/D/S MS3u sub, Yamaha YDG2030EQ
Yamaha KX-393 Tape deck, CDC 805 CD changer, Panasonic BD60, Sony turntable PS-T20
Panasonic TC-P50ST60, HD-PVR & WDTV Live, Harmony 900

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post #4 of 13 Old 03-10-12, 05:35 PM
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Re: LED back lighting behind screen?

If you want to have that effect, most people use multi colour LED strip lighting..
You can a get a roll of it with a colour changer from eBay fairly cheaply..

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post #5 of 13 Old 03-10-12, 05:40 PM Thread Starter
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Re: LED back lighting behind screen?

good idea.

Home theater:
Onkyo 805, Yamaha YDP2006EQ, Samson Servo 600 amp
3 EV Sentry 500 monitors across the front, 4 Mission 762i's Surrounds, SVS PB13U sub, Panasonic BDT220, Harmony 1100, Nintendo WiiU
Panasonic PT-AE8000 on a 120" 2,35:1 fixed screen

Living room system:
Sherwood/Newcastle R972, Mission 765's, SVS SBS02's, A/D/S MS3u sub, Yamaha YDG2030EQ
Yamaha KX-393 Tape deck, CDC 805 CD changer, Panasonic BD60, Sony turntable PS-T20
Panasonic TC-P50ST60, HD-PVR & WDTV Live, Harmony 900

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post #6 of 13 Old 03-10-12, 05:47 PM
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Re: LED back lighting behind screen?

The other thing is..if you connect the LED lighting to a dimmer and slowly dim the screen halo lighting as the movie starts, it looks very affective!

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post #7 of 13 Old 03-10-12, 06:09 PM Thread Starter
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Re: LED back lighting behind screen?

Ive got a lutron dimmer hooked up to some rope light already I just have to program the harmony to control it still.

Home theater:
Onkyo 805, Yamaha YDP2006EQ, Samson Servo 600 amp
3 EV Sentry 500 monitors across the front, 4 Mission 762i's Surrounds, SVS PB13U sub, Panasonic BDT220, Harmony 1100, Nintendo WiiU
Panasonic PT-AE8000 on a 120" 2,35:1 fixed screen

Living room system:
Sherwood/Newcastle R972, Mission 765's, SVS SBS02's, A/D/S MS3u sub, Yamaha YDG2030EQ
Yamaha KX-393 Tape deck, CDC 805 CD changer, Panasonic BD60, Sony turntable PS-T20
Panasonic TC-P50ST60, HD-PVR & WDTV Live, Harmony 900

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post #8 of 13 Old 03-10-12, 07:32 PM
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Re: LED back lighting behind screen?

I would not recommend any lighting in the room during a screening of a film, but ambient light adds a nice touch when you bring friends in to the room. If that light fades out as the feature begins, even better. I saw rope light being used behind a "floating screen" a while back and it did look good, but I found myself looking at the edged of the image rather than being immersed by the image. In other words, I was distracted by it.
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post #9 of 13 Old 03-11-12, 09:31 AM
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Re: LED back lighting behind screen?

Backlighting should be neutral in color and approximately 10% of the brightness of the image on the screen. Colored backlighting alters the perception of the color of the image in the same way that backlighting alters the perception of contrast.

For projectors, the increase in ambient light must be very carefully considered, as this may offest the gain in perceived contrast.

Even with backlighitng that has a spectrum as close to neutral as possible, if the wall is not neutral, the offset in color will be visible.




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post #10 of 13 Old 03-11-12, 01:00 PM
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I remember reading an article a handful years back not to watch tv in the dark, and if possible, to have a light behind the screen. This is back when CRT's were in majority of households. I found it to be a lot easier on the eyes since CRT's were fairly bright.
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