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Gregg Loewen

Gregg Loewen

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  • March 3, 2009 at 2:46 pm in reply to: JVC DILA FP Type Displays #1300
    Gregg Loewen
    Keymaster

    Calibration report

    March 3, 2009 at 2:44 pm in reply to: JVC DILA FP Type Displays #1299
    Gregg Loewen
    Keymaster

    Attached is a copy of my last calibration.
    If I remember correctly the Color was plus 5-10 from center when I was finished.

    March 2, 2009 at 5:23 pm in reply to: JVC DILA FP Type Displays #1297
    Gregg Loewen
    Keymaster

    hi guys
    More info…
    Use the THX mode…it will give you an accurate color gamut for rec 709.
    Then enter the service mode to tweek the gray scale.
    To enter the SM:
    up down right left enter
    the above can be done from the remote control.
    the above needs to be done very quickly and you may have to attempt it 10-20 times.
    Gary at JVC is looking into getting us a macro to make this easier.

    March 1, 2009 at 4:18 pm in reply to: mitsubishi hc7000 #1296
    Gregg Loewen
    Keymaster

    hi guys
    Ray, thanks for moving.
    Once here for about a week or so (and all parties have read it) it is good to move it to the Service area.

    February 27, 2009 at 3:42 pm in reply to: Calibration Gear for Sale #1293
    Gregg Loewen
    Keymaster

    wow!!

    February 17, 2009 at 3:44 pm in reply to: Display Interface software for Pioneer ELITES from Sencore. #1288
    Gregg Loewen
    Keymaster

    it is very full featured.

    I have not tried it yet….i have a 150 tonight but do not know if the client will be home to assist me with accessing the rs232 port.

    February 14, 2009 at 4:40 pm in reply to: Display Interface software for Pioneer ELITES from Sencore. #1285
    Gregg Loewen
    Keymaster

    yup…thanks Ray!!

    My copy is now fully functional…though I have not attempted to use it on a display yet.

    February 14, 2009 at 1:56 pm in reply to: Display Interface software for Pioneer ELITES from Sencore. #1283
    Gregg Loewen
    Keymaster

    hi
    I tried this on a 151…only gave access to the front panel controls and white balance controls, nothing else (CMS, Color Space preset etc).
    As is, this program is essentially useless.

    February 7, 2009 at 1:05 pm in reply to: Calibrating Mitsubishi HC3000 #1279
    Gregg Loewen
    Keymaster

    hi David
    It should also have white balance controls available.
    I have never worked on this unit. Please keep us posted.

    Gregg

    February 6, 2009 at 2:22 pm in reply to: Gamma of Primaries #1278
    Gregg Loewen
    Keymaster

    hi John

    A good question for Dr Rudd too….Id love to have his input.

    Basically when asking about the “intensity” of the primaries at a variety of stimulus points you are correctly talking about primary gamma (vs gray scale gamma).

    A good test for color decoding is measuring primary intensity at 100% stimulus then comparing it to primary intensity at 75% stimulus. If it is not in the same proportions then there is a color decoder error (which may or may not be further correctable). This is essentially measuring primary gamma response (in the color decoder).

    We teach to do CMS adjustments at 75% stimulus as this is closer to the percentage of stimulus of an APL (average picture level), and thus best represents an average picture.

    Hope this helped ??

    Gregg

    February 5, 2009 at 11:06 pm in reply to: Gamma #1277
    Gregg Loewen
    Keymaster

    unless the display has mode presets (with perhaps different gamma settings), or gamma presets, or multiple point gray scale adjustments (pull all RGB down in the middle adjustments) then the gamma will be what it is.

    A lower number may be favorable in a room with ambient lighting.

    Good luck!!

    Gregg

    January 27, 2009 at 4:17 pm in reply to: Samsung LNT4681F #1272
    Gregg Loewen
    Keymaster

    ps…he said to try calling the 800 samsung # and ask them for the part.

    good luck!!

    January 27, 2009 at 3:35 pm in reply to: Samsung LNT4681F #1271
    Gregg Loewen
    Keymaster

    hi
    I got an email back from Mike Wood. He says “I dont think so”…that is why the diagram is given…so you can make your own.

    January 22, 2009 at 1:51 am in reply to: Gamma #1264
    Gregg Loewen
    Keymaster

    the back light adjustment (there is also an auto mechanism) might also be able to be manipulated to increase the gamma.

    January 21, 2009 at 8:27 pm in reply to: Gamma #1261
    Gregg Loewen
    Keymaster

    HI
    I will also let Michael chime in here.
    Did you use the 6×3 point system to adjust the gray scale? If so….you can pull down some of the center points to increase the gamma curve.
    Use the ColorFacts gamma calculator, or the gamma calculator that is built into CalMan.

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