Bias Lighting for a 65" Display?

Discussion in 'Displays' started by Ronald Epstein, Jan 12, 2014.

  1. GeorgeAB

    GeorgeAB Second Unit

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    deleted
     
  2. GeorgeAB

    GeorgeAB Second Unit

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    Since you asked, here is an updated partial list of other folks who have some experience with reference video imaging best practices, who define, recommend, and/or use D65 bias lighting with their displays:

    The Society of Motion Picture and Television Engineers (SMPTE)
    The International Organization for Standardization (ISO)
    The International Telecommunications Union (ITU)
    The National Institute of Standards and Technology (NIST)
    The Metropolitan Museum of Art
    Industrial Light and Magic (ILM)
    The Imaging Science Foundation (ISF)
    THX, Ltd.
    Electronic Arts
    deluxe
    Technicolor
    Microsoft Corporation
    Image Entertainment
    Universal Studios
    PostWorks
    The Criterion Collection
    Joe Kane Productions
    DisplayMate Technologies
    CNET Labs
    Radical Games
    Factor5 Studios
    High Moon Studios
    CinRam
    Rev13 Films
    Advanced Television Evaluation Lab- Communications Research Centre- Canada
    Apple Corporation
    Filet Post Production
    Post and Beam
    Cheyenne Mtn. Entertainment
    CBS Television
    Deluxe Digital Studios
    Splice Here
    Slant Six Games
    New Hat LLC
    Roush Media
    Samsung Germany
    Digital Film Lab- Denmark
    Nice Shoes, VFX New York
    Desperate Housewives, Editorial
    Rockhopper Post
    Live Nation Studios
    LionAV Consultants
    Avical
    Max Post
    Bandito Brothers Studio
    Chainsaw Edit
    Twin Cities Public Television
    Colorflow Post
    ABC Television
    The Moving Picture Company
    Dolby Labs
    Dreamworks Animation
    University of Quebec at Montreal
    Walt Disney Animation Studios
    Goodwin Films
    deTur Films
    Rock Paper Scissors Post
    Siren Studios
    The Institution Post
    Eclipse Post
    Video Assist- Canada
    Alter Ego Post- Canada
    Digicom Video- Canada
    Fragments/Megaphon- Norway
    Local Hero Post
    Newfoundland Independent Filmmakers Co-Op
    Pinata Post
    Tunnel Post
    Houdini Post- Brazil
    Bad Cat Films
    LDS Motion Picture Studio
    Pegasus Pictures- Iceland
    Red Creek Productions- Costa Rica
    Temple University
    The Allotment- UK
    Funimation Productions
    OPM Consulting- Sweden
    Keystone Entertainment- Canada
    The Film Syndicate
    Nicholas Wiesnet, DP
    Eventure Entertainment
    Nitrous, Ltd.
    Postmenn- Norway
    Screentracks, Inc.
    Sixteen19 NY
    Robot Post- Canada
    Parktown Studios- Canada
    Hybrid Films, Inc.
    CVLT Production
    NP Digital, Inc.
    General Motors
    Andrey Mesnyankin Producitons- Russia
    Affect Studios
    Afterimage Editorial
    Nomad Editing
    Lion Television
    Post-Moderne- Canada
    Sudio M- Canada
    Flanders Scientific
    Fancy Film
    Final Feliz- Mexico
    Screenday Productions- Germany
    Seven Film & Post- Austria
    Black Tie Studios
    Pinto Pictures
    Arts & Labor
    Spledor Omnia- Mexico
    Neuteck
    Cutters Studio
    Cathel Color Company
    A & D Images
    Illuminura Films- Brazil
    TXL Films
    Sancho Cine Digital- Chile
    Accomplice Edit
    Premier PR- UK
    Frame- Denmark
    Big Bang Post- UK
    MTV
    BLK MKT Digital
    SIF 309 Film Music- Bulgaria
    Goshen College
    Take 2 Films- UK
    Hedgehog Post- Lebanon
    Salt Digital Studio
    Prolounge- Sweden
    Horizon Productions
    Zoetrope/Aubrey Productions
    Nigma Studios Digital- Mexico
    School Of Visual Arts, NY
    Rods & Cones VFX
    Gray Matter Post
    Red Line Studios

    But what would they really know?
     
  3. Ronald Epstein

    Ronald Epstein Administrator
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    Yeah, pretty much seems like a no-brainer that I should do this.
     
  4. schan1269

    schan1269 HTF Expert
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    Bias lighting is the real reason automotive interiors are being lit up. Our '10 Subaru has a blue light at the interior map light aimed down at the console. The cupholders are also lit.

    I can drive it hours longer, when dark, than I can to '06 Subaru.

    There is only one negative to a bias-lit interior...
     
  5. Robert Crawford

    Robert Crawford Moderator
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    Do whatever that makes you happy!
     
  6. GeorgeAB

    GeorgeAB Second Unit

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    Are you joking?
     
  7. Ronald Epstein

    Ronald Epstein Administrator
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    George,

    Robert was giving me sound advice.

    Some people don't believe in the need for bias lighting -- others like myself
    are just curious.
     
  8. Robert Crawford

    Robert Crawford Moderator
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    I'll refrain from replying to you and any further involvement in this discussion.
     
  9. Type A

    Type A HW Reviewer
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    Since when does calibration to standards automatically equate to personal preferences? Especially in regards to Fl.
    Yourself.Ill bail out of this thread as well, you obviously have far more experienced folks than myself to help.
     
  10. GeorgeAB

    GeorgeAB Second Unit

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    Sound advice is a good thing. After going back through all the posts in this thread, all I could find from Robert was a question. Did I miss something? I find it odd that a home theater forum moderator would question why someone would want better performance than what they are used to.

    Most video consumers lack a fundamental understanding of imaging science principles and video industry best practices. TV manufacturers generally don't devote much effort in explaining the terminology, features, capabilities, and limitations of their products in the owner manuals. After more than two decades since Joe Kane and the Imaging Science Foundation began educating the public and the industry about video performance, televisions still have a "brightness" control that adjusts black levels. Confusion in this arena is still far too commonplace. Video professionals have understood the importance of bias lighting in the viewing environment for well over half a century, yet, most video consumers do not correctly understand this simple technique.

    Am I mistaken in assuming that folks generally come to this forum to learn better ways to experience movies in their home? There is much misunderstanding, hyperbole, and sometimes even deception in articles and advertisements found in consumer electronics media outlets. Unfortunately, consumers can form erroneous misconceptions and presumptions about video issues based upon such media exposure. This forum, and others like it, came about so home entertainment aficionados could learn and share with one another better ways of enjoying home theater, etc.

    Best regards and beautiful pictures,
    G. Alan Brown, President
    CinemaQuest, Inc.
    A Lion AV Consultants affiliate

    "Advancing the art and science of electronic imaging"
     
  11. Ronald Epstein

    Ronald Epstein Administrator
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    George,

    I can't speak for Robert.

    However, I am assuming most consumers are happy with the quality of their display
    and have never heard of bias lighting.

    Those who are just hearing of it now, may not be convinced or even think it necessary
    to invest in such a product. Not everyone is watching their display in a totally darkened
    environment, or even getting eye fatigue.

    You post some very convincing references. There are many testimonials on Amazon from
    actual owners of bias lighting who say that it does what promises.

    Again, I am not speaking for anyone, but I believe that my original review of my display was
    glowing. I never indicated problems with eye fatigue due to the brightness. For all intents
    and purposes, I was highly satisfied with my display.

    ...then suddenly I post a question about adding bias lighting. I believe that warrants a reaction
    such as "why change something you are happy with?"
    Personally, I am looking to experiment. If I spend $30 on two light kits and I feel it does nothing,
    I think the experiment was worth it. However, I am pretty much certain that with your references
    and the testimonials on Amazon, I am going to see an perceived improved performance from my display.

    ...and yes, the purpose of this forum is to help better the home theater experience for everyone.
    However, keep in mind, everyone needs to make up their own mind as to whether they feel they
    need to further improve their own experiences.
     
  12. GeorgeAB

    GeorgeAB Second Unit

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    Why is this not always obvious? Isn't it a fundamental fact of life that we get to decide when to seek greater knowledge of a subject or activity of interest?
     
  13. Ronald Epstein

    Ronald Epstein Administrator
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    George,

    You are not going to convince everyone.

    That's life. You can't blame the person. You can't blame this forum.

    Be happy I am willing to experiment and will post my experiences soon afterwards.
     
  14. schan1269

    schan1269 HTF Expert
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    When it is often our goal to get people to understand why to buy better than a TCL TV and a Philips $99 HTiB...and we are worried about SMPTE?

    Maybe we should start up another forum at the opposite end of the dredge that was created for UV codes...

    We shall call it...

    "Home Theater Master Class...ye not come in with stupid questions"
     
  15. GeorgeAB

    GeorgeAB Second Unit

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    Agreement isn't necessary. Clarity is a much more practical objective in a public forum or debate. How odd that "blame" would be considered! The choices each of us make carry their own benefits or consequences. Following thoroughly proven imaging science principles, display industry standards, and recommended practices, is a choice viewers can make once they become aware of such issues. Having differing priorities or preferences doesn't make one right or wrong, just different. If a viewer's objective is image fidelity and a reference viewing experience, following reference practices is the means to that end.
     
  16. DaveF

    DaveF Moderator
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    Ron, please post what you buy and how you like it after a couple week's use!Back not long after I first started HTF, I learned about bias lighting. At some point, I had a cheap 12" fluorescent mounted on the wall behind my Sony WEGA with double-sided sticky tape. I used a few sheets of custom-fit paper to dim and diffuse the light. It was connected to my AVR's switched outlet for auto-on. It was dandy.Some years later, I moved, changed receivers, and the bulb died -- and never got around to replacing it. I've thought about setting up dedicated bias light again. I need a little light to be comfortable. I get a little glare and halos from my contacts from point sources in dark light. So bias light is more comfortable for me. I've been using kitchen lights for a while as a good-enough.I wouldn't mind an intentional bias behind the flat screen again.
     
  17. Steve Tannehill

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    I have built-in bias lighting...my Mitsubishi DLP has a blue light mounted on the front of the TV along the bottom. It is plenty bright and not distracting.
     
  18. Sam Posten

    Sam Posten Moderator
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    +1 this. I'm all for you experimenting Ron if that's what floats your boat, but I havent found I like this any better the few times I've seen it and it reeks of marketing to me, especially in the case of Philips. YMMV.
     
  19. Gregg Loewen

    Gregg Loewen Video Standards Instructor, THX Ltd.
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    hi guys

    I'm finally finishing up at CES and headed home tomorrow.

    A few scary thoughts in this thread.

    Backlighting is a SMTPE recommendation for a reference environment. Back lighting is a THX requirement for all post production (reference environment). Bias lighting needs to be at the same color temperature as the light emitting from the display (D65 white), assuming that the room is also black, white, or a neutral (D65) shade of gray.

    BTW, George has pretty much dedicated the last 20 years of his life in researching and promoting environmental science in relation to video standards. While a few of his comments are a bit harsh, his comments are 100% on in relation to every visual science research discussion over the past 3 decades.

    Having a bias light is ALWAYS A GOOD THING when using a direct view display. Not a good thing when using a projector that relies on the absence of light to create a contrast ratio.
     
  20. Gregg Loewen

    Gregg Loewen Video Standards Instructor, THX Ltd.
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    forgot to add:

    The addition of a properly implemented bias light will:

    1. decrease eye fatigue
    2. increase perceived contrast ratio (makes blacks seem darker...which is great for a display with marginal black levels).
    3. allow the viewer to see greater detail due to the fact that their eyes will be less fatigued.
     

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