OLED TV Reviews

The measurements given here were made using CalMAN measurement software from SpectraCal, together with Photo Research PR-650 and Klein K-10A color meters and the VideoForge pattern generator from AVFoundry.

Full-On/Full-Off Contrast Ratio: Infinite The measurements here were taken in 2D only. They were performed in the Cinema (User) Picture Mode unless noted otherwise. With the Contrast and OLED Light controls set to produce a peak white level of about 35 ft-L and the Brightness control set to 54, the black level was so low as to be unmeasurable with any test tools available to us. This resulted in an effectively infinite full-on/full-off contrast ratio. But as with the LG 55EA9800 OLED we reviewed last spring, the Brightness control setting was critical to this result. On some material, with the Brightness control at 55 or 56 (which test discs suggested was the optimum setting), the center of a full black screen would noticeably lighten. I chose a brightness setting of 54 for this measurement because it not only allowed the display to perform at its best but, most importantly, looked fine at the same time on most source material. Other samples may differ slightly from the settings used here.

In the Sports Picture Mode in its default settings, the peak white level was 99.2 ft-L, the highest reading I obtained from the set.

At a 35 ft-L peak white level, the color Delta E, before calibration in the Warm2 Color Temperature setting, averaged 3.55 (maximum 5.98 at 100%, minimum 1.33 at 30%). After calibration, the Delta E averaged 0.94 (maximum 1.57 at 100%, minimum 0.12 at 90%, 1.33 at 30%). (Delta E is a figure of merit that indicates how close the result is to the BT. 709 HD standard, otherwise known as Rec. 709. A Delta E below 3 is generally considered excellent and visually indistinguishable from perfect.)

The 2D color gamut (not shown) was very good even without employing the color management system. Before calibration, it averaged 3.52 for all primary and secondary colors. After, it averaged 0.89.

At a 2.4 setting of the Gamma control, the gamma averaged 2.24, with a minimum value of 2.13 at 80% brightness and a maximum of 2.34 at 30%. This setting worked for me on most sources, but on some material, 2.2 worked better.—TJN