@ Guy Kuo and others...green tint

Discussion in 'Archived Threads 2001-2004' started by Anthony V, Aug 22, 2002.

  1. Anthony V

    Anthony V Auditioning

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    Set-up

    Sharp XVZ-9000E
    Denon 3800 via YUV
    Stewart Firehawk 110'' diag.

    Problem:
    Slightly green tint on faces

    Dear all

    I have calibrated with AVIA and color bars are good.
    When looking at the color-bars through the blue filter everything seems fine.
    Checking the test-pattern with the 3 colors and % I have following results:

    Blue 0 to +5%
    Green -5%
    Red 0 to 5%

    So it looks pretty close to what is possible.

    Strangely enough I still have a slight greenish tint with flesh-tones.
    Where or what do I have to change to correct this problem ??
    Gamma ?
    Even when using Gamma Standard that has a flat curve the problem persists........
    Would accessing the service-menu and changing the gains have an effect ?

    I have my settings here as a reference in case some Sharp users whant to add their comments.

    R Bright 128
    G Bright 128
    B Bright 128
    R Gain 104
    G Gain 95
    B Gain 97
    In the User Menu
    Contrast: +3
    Brightness: +1
    Color: +4
    Tint:+3
    Red:+2
    Blue:-1
    Gamma 1
    Col Temp -2
    800 Ansi Mode

    Maybe having the Color at +4 is a mistake an pronounces the greenish tint having to go to +3 with TINT ?

    I know it's all question of personal taste but is there a general rule not to exceed Color 0 ???
    What is the starting point ?
    By choosing Color +-XX I then can compensate with tint +-XX so .....
    BTW choosing Color +1 as a starting point and then changing TINT still will give me the greenish look....
    Taking the color value lower than 0 will result in a lack of color and "punch"

    Is this something that can be corrected with the projector settings or will I need some sort of a filter to compensate the green tint ?

    PLEASE HELP

    Thanks

    PS: Sorry 1 post and already too many questions


    Anthony
     
  2. Anthony V

    Anthony V Auditioning

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    No suggestions ?

    Thanks
     
  3. Gregg Loewen

    Gregg Loewen Video Standards Instructor, THX Ltd.
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    Gregg Loewen
    If your image is green add red and blue. The 9000 (as you know) has separate red and blue controls. Use a gray step pattern to do this, then adjust the color and tint controls.

    You may want to also try adjusting the color temp control. The last 9000 that I calibrated had to be moved to its lowest setting (-3??) then I had to add a lot of red to adjust the gray scale. Overall the projector looked great and is on my short list for a projector for my new HT room.

    Hope this helped.

    Regards
    Gregg
     
  4. Anthony V

    Anthony V Auditioning

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    @Gregg

    Hello and thank you for your input.
    Lowering colortemp to -3 ?
    Do you remember how the settings where for red and blue in the "normal" menu ?

    Red +30 ? where did you set Blue ?

    Thanks

    Anthony
     
  5. Gregg Loewen

    Gregg Loewen Video Standards Instructor, THX Ltd.
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    I dont remember the #s. I know I set the color temp at its lowest setting and then had to add a HUGE amount of red and take away a little bit of blue.

    REMEMBER THAT EVERY PROJECTOR IS DIFFERENT

    best of luck!!

    Gregg
     

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