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  1. #1
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    philips 46pfl9705 worst image quality ever

    i upload two videos,one with backlight scan to best picture and another with backlight scan off.
    please tell me if you have experience the same problem with me.



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    Yes, this is a known problem of the local dimming implementation of Philips. It makes everything below 20 IRE black.

    (You can try the settings from here: http://www.flatpanelshd.com/review.p...&id=1291289229
    They are wrong regarding gamma, but they try to use a bright gamma so as to show more shadow detail. I don't like these settings, but perhaps you will like them...)

  3. #3
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    Well... I suppose with "worst image quality ever" you mean the first clip, the one with Dynamic Backlight at Best Picture, is far too dark, as far as these videos are accurate representations of how it looks in reality.

    If that's what you mean, I have a few suggestions, to begin with:

    - raise Contrast by about 8 (76 in my case)
    - Brightness = 51

    - Dynamic Backlight = Standard
    - Perfect Contrast = Off
    - Gamma = 2

    How are your current Picture settings?...

  4. #4
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    Quote Originally Posted by petasis View Post
    Yes, this is a known problem of the local dimming implementation of Philips. It makes everything below 20 IRE black.

    (You can try the settings from here: http://www.flatpanelshd.com/review.p...&id=1291289229
    They are wrong regarding gamma, but they try to use a bright gamma so as to show more shadow detail. I don't like these settings, but perhaps you will like them...)

    no i dont like them
    now i understand the problem and i find it really annoying

    i took the video with cinema preset without change nothing.
    if i change then in many cases its not too black but the <<Christmas tree>> effect is always here

  5. #5
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    Mines (42PFL8404) far too dark - so are all Phlilips TV's too dark to see - should they all go back?

    I posted this issues few days ago, and since this is 'a known issues' it would've been nice to be told that

    Instead I got some bull about screen settings and had to 'find out' myself to switch Dynamic Backlight off

    Even then the screen is still too dark so might try gamma up

  6. #6
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    Quote Originally Posted by petasis View Post
    Yes, this is a known problem of the local dimming implementation of Philips. It makes everything below 20 IRE black.

    (You can try the settings from here: http://www.flatpanelshd.com/review.p...&id=1291289229
    They are wrong regarding gamma, but they try to use a bright gamma so as to show more shadow detail. I don't like these settings, but perhaps you will like them...)
    For a 'known issue" ('everything below 20 IRE black. ') they dont mention it in their review, and their settings recommend leave dynamic backlight on and they go on to describe it "Black depth on Philips 9705H is perfect"

    so dunno what I'm reading but dont need calibrating tool on my picture for my wife to say 'it's too dark' - and it is

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    What you mean "its too dark"?

    The 9705 is no dark at all, in fact it can easily reach 400 cd/m2.

    But it will make black any large area that is 20 IRE and below. This means that in dark scenes (like the ones shown in the video for the potter movie), the screen will go completely black.

    If you thing that it is "too dark", just put contrast above 70...

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    Quote Originally Posted by petasis View Post
    What you mean "its too dark"?

    The 9705 is no dark at all, in fact it can easily reach 400 cd/m2.

    But it will make black any large area that is 20 IRE and below. This means that in dark scenes (like the ones shown in the video for the potter movie), the screen will go completely black.

    If you thing that it is "too dark", just put contrast above 70...
    My contrast is 100 (as is 3 of the 5 presets) which suggests the TV itself is too dark

    Maybe just my set - not acceptable by anyone standard though

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    Quote Originally Posted by petasis View Post
    But it will make black any large area that is 20 IRE and below. This means that in dark scenes (like the ones shown in the video for the potter movie), the screen will go completely black.

    If you thing that it is "too dark", just put contrast above 70...
    Just one question: where did this rumor come from?... I've seen it in many different places, but... unless the 40/46" PFL9705 is much worse than the 32" one (the one I have)... this really is not true.

    I have Contrast at 76, Brightness at 51 and Dynamic Backlight at Standard; with these settings there is no black crush: I can see all the way down to 3 IRE looking at the screen from the front and even 1 IRE when looking at it from a small angle. So really... don't worry about that with a PFL9705!...
    Last edited by Freddy; 06-13-2011 at 09:30 PM.

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    Hi,

    can somebody explain what IRE does stand for? It would be easier for the other readers to know what you are talking about

    Toengel@Alex

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    Do you think there is any danger of Philips engineer coming to have a look at my TV to see the problem?

    I simply cant see anything happening in an scene thats shot inside

  12. #12
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    Quote Originally Posted by Toengel View Post
    can somebody explain what IRE does stand for? It would be easier for the other readers to know what you are talking about
    Sure!... In short it stands for the brightness level of the video signal, ranging from 0% black (0/7.5 IRE) to 100% white (100 IRE).
    The difference in black level (0/7.5 IRE) is a regional one: 7.5 IRE for NTSC countries and 0 IRE for everyone else. The problem is that IRE is actually an analog composite video scale and should not be used for digital video data, but it still is being used everywhere. The relation between these IRE values and digital brightness levels is very much source dependent.
    A more complete explanation, for the ones really interested, can be found here:
    http://www.glennchan.info/articles/t...5IREsetup.html

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    Quote Originally Posted by JethroUK View Post
    My contrast is 100 (as is 3 of the 5 presets) which suggests the TV itself is too dark

    Maybe just my set - not acceptable by anyone standard though
    I think you should contact the service. The 9705 is a really bright set, it has "bright pro", which can reach 500 cd/m2. And this is a lot of light, even if you have the TV in a garden...

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    Quote Originally Posted by Freddy View Post
    Just one question: where did this rumor come from?... I've seen it in many different places, but... unless the 40/46" PFL9705 is much worse than the 32" one (the one I have)... this really is not true.

    I have Contrast at 76, Brightness at 51 and Dynamic Backlight at Standard; with these settings there is no black crush: I can see all the way down to 6 IRE in large areas, 3 IRE in smaller ones looking at them from the front and even 1 IRE when looking at the screen from a small angle. So really... don't worry about that with a PFL9705!...
    I am not talking about shadow detail crash. The shadow detail is enough if there is some light on the scene. But if the whole scene is too dark, then the 9705 switches all LEDs off.
    So you get no picture at all. (The video of Harry Potter shows that exactly).
    The 20 IRE pattern, I have tested it myself in my 46 9705 with local dimming at best picture. You can try it yourself also...

  15. #15
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    Quote Originally Posted by Toengel View Post
    Hi,

    can somebody explain what IRE does stand for? It would be easier for the other readers to know what you are talking about

    Toengel@Alex
    Please see here: http://en.wikipedia.org/wiki/IRE_%28unit%29

    0 IRE is black, 100 IRE is white, and all the values in between are various shades of gray.
    For example, here is 60 IRE:

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