1. Forum
  2. Usenet
  3. UK.D-I-Y

  • DIY "infinity contrast" TV

    From Adrian Caspersz@21:1/5 to All on Sat Mar 1 21:38:51 2025
    XPost: uk.tech.digital-tv

    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

    https://www.youtube.com/watch?v=qXrn4MqY1Wo


    --
    Adrian C

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From David Woolley@21:1/5 to Adrian Caspersz on Sun Mar 2 00:39:14 2025
    XPost: uk.tech.digital-tv

    On 01/03/2025 21:38, Adrian Caspersz wrote:
    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.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Andy Bennett@21:1/5 to David Woolley on Sun Mar 2 08:10:55 2025
    XPost: uk.tech.digital-tv

    On 02/03/2025 00:39, David Woolley wrote:
    On 01/03/2025 21:38, Adrian Caspersz wrote:
    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.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Graham.@21:1/5 to All on Sun Mar 2 12:43:30 2025
    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.


    --

    Graham.
    %Profound_observation%

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Rumm@21:1/5 to David Woolley on Sun Mar 2 18:24:34 2025
    XPost: uk.tech.digital-tv

    On 02/03/2025 00:39, David Woolley wrote:
    On 01/03/2025 21:38, Adrian Caspersz wrote:
    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.

    /=================================================================\
    | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------|
    | John Rumm - john(at)internode(dot)co(dot)uk | \=================================================================/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)