Panasonic’s TX65CZ950 press release frankly reads like a checklist of what’s wrong with the current OLED TV offering, which, of course, is 100% LG. Accordingly, it makes for interesting reading: aside from the fact that biting the hand that feeds them is a daring move, it explains how the Japanese TV maker is addressing the problems that we found with the current attempts at OLED televisions. While those produce an excellent (and unbeatable) minimum luminance level with their zero blacks, we’ve found that LG’s OLED TVs do not produce good dark-scene
quality, a point which we feel has been lost in many evaluations.
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To start with, Panasonic promises comprehensive look-up table (LUT) technology on the Viera CZ950, which will be used both to compensate for any panel inaccuracies (all panels have them) and to square the circle of adapting the OLED panel’s native wide colour gamut to correctly display existing Rec.709 content. LG’s own video processing doesn’t do a good job of this, with hue errors, most visibly with cyan, appearing during dark scenes (ironically enough, reproduction of dark scenes has long been the selling point of OLED). On top of that, attempting to use advanced controls on LG OLEDs to calibrate greyscale and gamma exacerbates contouring/ banding errors on the display. Although Panasonic’s PR announcement doesn’t specifically mention those, we would hope that this issue is specific to LG’s video processing and not a problem with the panel.
More interesting still is a feature called “Absolute Black Gradation Drive”. Panasonic mentions that the zero black capability of OLED “has actually been a challenge for OLED TV makers, since the shift from complete blackness to just above black is a very difficult gradation step to render”. Indeed, this echoes the findings of our own tests. As well as featuring colour errors during dark scenes, the LG OLED TVs often exhibit indistinct shadow details. Panasonic then mentions that its “experience with plasma technology has enabled it to solve the issue on the TX-65CZ950, resulting in unprecedentedly beautiful and precise detailing even in the very darkest picture areas”. This makes sense, given that the OLEDs we’ve assessed have exhibited a similar, but more extreme version of the characteristic of PDPs where the colour and greyscale would shift slightly depending on the brightness of the scene being shown on screen.
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Panasonic Launch TX-65CZ950 4K Curved OLED TV at IFA 2015