Electronic Visualization for the Next Century

  • There’s More To The Story (There Always Is!)

    April 18, 2017

    A couple weeks ago, I posted a story about a particularly irritating problem I was having with my high-speed Comcast internet service dropping out. After lots of troubleshooting, I thought I had cornered the culprit – a Samsung-manufactured set-top box that Comcast was using for delivery basic Xfinity services (no DVR). When I connected the cable TV input connection to a spectrum analyzer, I saw some pretty nasty burst of spectral noise that ranged from 11 MHz all the way up to 400 MHz. I figured this might have been the cause of the dropouts and promptly returned it to the local Comcast Store, only to find out that particular model wasn’t in use any more and that I’d have a much smaller, flatter version to take home – one that would link automatically to my main X1 DVR. Coincidentally, the dropout problem stopped, so I did what any other reasonable person would do: I assumed that was the end of it. Except it wasn..Read more

  • Three Premium 2017 LCD-TVs Plot Different Paths to Enhanced Performance

    May 10, 2017

    The white LEDs used in conventional LCD-TV backlight units -- which are actually blue LEDs with a broadband yellow phosphor inside the package -- produce a white light that has insufficient output and purity in the green and red. All current approaches to improving LCD-TV color gamut and purity involve improving the intensity and purity of the red and green light that is produced by the BLU and makes its way to the matrix color filter. Interestingly, three premium 2017 sets now on the market adopt completely different approaches to solving this problem. Samsung's "QLED" Q Series uses a new type of quantum dot (QD) for converting some of the light from the backlight's blue LEDs to red and green. The novelty here is not the architecture of the QD-enhanced backlight, but the design of the Nanosys-developed QDs. Samsung says the QDs are fabricated with a metal alloy and end up with a light-transmissive metal alloy shell. Industry sources say the fabrication process produces "perfectl..Read more