DIY "infinity contrast" TV

[Adrian Caspersz]

Take an old discarded TV with a broken backlight and a discarded office
video projector, and use the latter to create a far better lightsource?
The combination comparable with modern expensive OLED?

Maybe a bit Heath Robinson, and impractically large, but I found it clever.

YOUTUBE DIY Perks:

DIY "infinity contrast" TV - with 100% recycled parts

[David Woolley]

Post by Adrian Caspersz
The combination comparable with modern expensive OLED?

No. The contrast range is the same as with the original backlight, as it
is the LCD that determines it.

[Andy Bennett]

Post by David Woolley

Post by Adrian Caspersz
The combination comparable with modern expensive OLED?

No. The contrast range is the same as with the original backlight, as it
is the LCD that determines it.

I would agree but add apart from where the scene is totally black. For a
night time firework display this would of course look impressive. The
increase in contrast is an optical illusion. For general scenes where
the rear projector is on (white) it's all down to the LCD.

[John Rumm]

Post by David Woolley

Post by Adrian Caspersz
The combination comparable with modern expensive OLED?

No. The contrast range is the same as with the original backlight, as it
is the LCD that determines it.

I suppose if part of the limitation was not just the ability of the LCD
to occlude the backlight but also the peak brightness of the light
source, the significantly brighter light source might actually increase
it (even if only by the extra brightness resulting in more perceived
average brightness reduction resulting from the eye's reaction)
--
Cheers,

John.

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[Graham.]

LG made an DLP RPTV set
(RPTVs were popular in the early naughties, usually for delivery
to high-rise council flats with no lift, but I digress).

I suppose in some parallel universe where thinnest wasn't so
desirable that LG set would have evolved to this.