HDTV
Toshiba Regza 46RV53OU 46" 1080p LCD HDTV
- Written by Ofer LaOr
- Published on 04 July 2008
The Performance
The screen itself has a matte finish so it does not produce reflections from ambient room light.
The blacks on this unit are deeper than I could have hoped for. Dynamic backlight usually rates at around 3:1 or 4:1 between the light it produces when full on to full off. This display measures at roughly 10:1, which means that the dynamic backlight is way more aggressive than any other LCD I’ve tested so far. This has both good aspects to it (it can go really dark) and bad (you can see the backlight shifting during many scenes).
This display produces a distinctly bluish picture (Japanese prefer a high color temperature). The WARM setting produces 8300 degrees Kelvin (almost 30% too high!) The display does have some controls for color adjustment and calibration, but I think that this was done intentionally, and that’s simply too bad.
Primaries do not seem too out of control, and the typical lack of blues is shown here too. Testing temperature stability shows somewhat problematic results. Not only is the blue turned up way too high, the reds suffer from some stability issues throughout the range. The resulting data were less than stellar. Here is the color temperature graph.
The RGB levels. Remember that I said it looked too blue? Here is the proof. Note that this does not conflict with the CIE chart shown below where it indicates that the blue is undersaturated with respect to the HDTV standard. The blue can be turned up too high without being "saturated" enough.
Gamma was determined to be 2.11, which is satisfactory.
Here is the CIE chart.
And a spectral scan.
The screen was one of the brightest I have tested, measuring at over 620 cd/m2 – producing a 26,000:1 Full On/Off Contrast Ratio! Meausring ANSI contrast, I got the amazing results of nearly 4000:1!
