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LCD Bright / Dark

  • 09-02-2008 4:54pm
    #1
    IamBeowulf
    Closed Accounts Posts: 432 ✭✭


    Hi there

    I recently bought a Philips 47" HD LCD (model no 47PFL7642D/05). The picture quality is outstanding and at €930 (luzerntech on ebay) it was a steal.

    <y only problem is that it tends to brighten or darken frequently. It reminds me of when Macrovion would interfere with DVD / SKY. It'll dim when there are dark colour, but if something bright appears, the rest of the screen will brighten to sort of match the level of brightness.

    I wouldn't care if it wasn't that noticeable, but even my non-anal-retentive friends noticed it. it's like someone has their finger on the brightness button.

    I've tried switching on / off digital settings (Contrast Plus etc...) and it doesn't help.

    It's something I noticed happening on my friend's 42 inch Samsung LCD. Is it a common occurrence? Is there any way to change it?


Comments

  • #2
    ongarite
    Registered Users, Registered Users 2 Posts: 8,447 ✭✭✭ongarite


    I'm no expert on LCDs but I think its the backlight auto-dimming, changing to optimise black levels, colour contrast. AFAIK the newer Sony, Samsung also use a similar method.


  • #3
    IamBeowulf
    Closed Accounts Posts: 432 ✭✭IamBeowulf


    ongarite wrote: »
    I'm no expert on LCDs but I think its the backlight auto-dimming, changing to optimise black levels, colour contrast. AFAIK the newer Sony, Samsung also use a similar method.

    Really? it's very distracting! It's a pity there's no way to switch off this optimization. I'd rather have varying quality levels than varying brightness; the former would be far more endurable.

    Or...maybe I'm picky...?:) Anyone else have this issue?


  • #4
    Ghost Train
    Registered Users, Registered Users 2 Posts: 30,681 ✭✭✭✭Ghost Train


    have you tried turning off active control
    menu->features->active control

    its meant to adjust the picture settings as the picture changes, so might have some effect


  • #5
    Soarer
    Registered Users, Registered Users 2 Posts: 9,035 ✭✭✭Soarer


    Don't know what way the Philips works, but with the new Sony sets, you can get rid of this auto-dimming by turning PC mode on.
    It's only noticeable on the Sony set if here's a mostly black screen for 4 or so seconds eg. start of end credits. Once the credits start scrolling and there's a lot of white on the screen again, it re-brightens itself to the normal settings.
    Haven't noticed it other than credits though.


  • #6
    IamBeowulf
    Closed Accounts Posts: 432 ✭✭IamBeowulf


    eolhc wrote: »
    have you tried turning off active control
    menu->features->active control

    its meant to adjust the picture settings as the picture changes, so might have some effect

    I tried that but unfortunately it doesn't really help.


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  • #7
    IamBeowulf
    Closed Accounts Posts: 432 ✭✭IamBeowulf


    Soarer wrote: »
    Don't know what way the Philips works, but with the new Sony sets, you can get rid of this auto-dimming by turning PC mode on.
    It's only noticeable on the Sony set if here's a mostly black screen for 4 or so seconds eg. start of end credits. Once the credits start scrolling and there's a lot of white on the screen again, it re-brightens itself to the normal settings.
    Haven't noticed it other than credits though.

    Thanks but my TV doesn't have a PC Mode.


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