- Written by John E. Johnson, Jr.
- Published on 05 December 2007
On the Bench
As I said, HDTVs these days tend to be pretty good out of the box. The uncalibrated color temperature graph is shown below, with the calibrated color temperature graph following. The TV tended to be a bit warm (reddish) in the dark regions before and after calibration.
Brightness measured at 31.3 foot-Lamberts, which is about twice as bright as a commercial movie theater. So, there is plenty of brightness for viewing anytime. I measured a contrast ratio of only 300:1, which is way below the specification. The problem appears to be the background illumination (the black level), which measured 0.1 foot-Lambert. However, because the screen is so bright, it still looked great.
Here you see the RGB graphs before and after calibration. Although I could get the RGB lines closer together for IREs above 30, the spread increased below that brightness value. This is a good reason why manufacturers need to add more calibration menu items in future models, including the ability to vary RGB values at different IRE levels, such as 10-30, 31-60, and 61-100.
Gamma before and after calibration was about the same. Again, perhaps some menu additions to the calibration capabilities would be helpful, with individual adjustments for 10-30, 31-60, and 61-100 IRE.
The CIE Chromaticity graph indicates that it has enough red capability, more than enough green (although slightly blueish), and not enough blue capability.
The VIZIO VP50 50" Plasma HDTV display, although not as terrific as one of the much more expensive models from other big name companies, is still a very good product, and well worth considering if your budget is limited, or if you just don't want to spend in the $2k and up market. It has the digital connections necessary (HDMI) for that new high def DVD player you bought, as well as high def programming from satellite. It's a snap to set up, looks fine without having to calibrate it, and has great sound without having to connect it to a receiver.