Originally Posted by detroit_fan
I have been watching a lot of movies with the lights out recently and would like to add some biased lighting behind my tv. I see that the ideal-lume gets good reviews and looks like a nice option but i had a couple questions i was hoping someone could help me with. i see that almost everyone recommends that the wall behind the tv be white or near-white
, but my wall is what i would describe as a "pastel blue". it is not dark, but there is a blue tint to it. overall it is a light color though. would this color prevent me from being able tot use the ideal-lume, would it throw off my colors?
also, i have a 61" samsung dlp that this would go on. from what i have read the ideal-lume standard (1 bulb) would be sufficient for this tv, was just hoping maybe someone had used on on a comparable size dlp tv and could give some feedback
thanks for any help, i appreciate it.
Any technically neutral wall color from a medium/dark gray up to white will work for a video display surround. The lighter shades will help with black level and contrast perception when viewing the TV while the room is fully lit. Just the wall behind the TV is the minimum recommendation for neutral color. The principle at play here is the fact that any conflicting color within the observer's field of view, while watching the screen, will distort color perception. More vivid or saturated colors will have greater effect, less colorful surrounding surfaces will have lesser effect. The only way to insure the viewer will perceive the colors correctly in an image is to provide a neutral surround, with ambient lighting as near to the D65 white point of video as possible.
A colored surround actually subtracts the same color from what our eyes observe in the screen image. This perceptual phenomenon occurs in the brain and is inescapable, although subtle in cases like yours with a light pastel wall color. A marvelous graphical demonstration of this phenomenon can be experienced at this link: http://www.echalk.co.uk/amusements/OpticalIllusions/illusions.htm
. Go down to the fifth section of illusions, titled: 'Colour perception.' Use the slider included with each demonstration to adjust the mask opacity of the color surrounds. You will see that even very slight coloration in the surround affects the perceived color of the object of focus.
When the Society of Motion Picture and Television Engineers (SMPTE) published their seminal work on best practices for designing video viewing environments, very little discussion dealt with viewer comfort (SMPTE RP166-1995). The dominant focus in the document dealt with preserving correct color perception. This focus may simply be by reason of the paper's subject dealing with color video, rather than monochrome video. Nevertheless, this area of the forum discusses display calibration. It's a simple scientific reality that a "perfectly" calibrated video display cannot be perceived as having accurate color if there is a conflicting colored surround within the observer's field of view. A spectral analysis instrument cannot measure what occurs in the visual cortex of the brain. Therefore, the simplest way to ensure image fidelity is to provide a calibrated display and a neutral surround in the viewing environment.
A single Ideal-Lume Standard should provide more than enough illumination for your size of TV and your light colored wall. We have had users report to us that the single light was sufficient for their 73" RPTV and a white wall. You're certainly welcomed to call our office regarding questions of this kind. Unlike most consumer electronics manufacturers, we are a tiny company that responds to customer inquiries well. In most cases you will likely end up speaking directly to me.
Best regards and beautiful pictures,
G. Alan Brown, President
A Lion AV Consultants affiliate
"Advancing the art and science of electronic imaging"