While testing brightness and black level, we discovered two notable points of interest (which we’re sure Merson will cover in deeper detail within his own review): 1. The EA9800 sample we reviewed arrived with a number of what we’re calling “lazy” sub-pixels. We stopped counting them around 40. 2. Using a 100 IRE brightness window test pattern (stay with us, people!) we discovered that the TV only sustains maximum brightness for about a minute before it begins to slowly dim down over the next four. Sounds pretty bad, doesn’t it? Maybe not.
Lazy sub-pixels, enhanced for visibility. Image taken using a 4 second exposure on a Nikon D8000 with 50mm F/1.8 lens. NOTE: These pixels are invisible to the naked eye and had no effect on the viewing experience during our tests.
The sub-pixel issue is bad news in that it indicates there may be a quality control or production issue at the manufacturing level – that’s not good. [Editor's note: This issue, if indeed caused by TFT drive current deviation as LG maintains, is not limited to OLED technology]
But, from a practical standpoint, the sub-pixels are so intensely small that they weren’t visible with the naked eye from further than 1.5 feet. In fact, it took a 4-second exposure on a Nikon D8000 with a 50mm f/1.8 lens to capture the errant pixels. As a result, the image we took exacerbates the problem considerably just so that it can be seen. But in real-life viewing sessions, these lazy pixels were completely undetectable and had zero visible impact on the performance of the television.
This is disconcerting. That many lazy pixels can’t be considered acceptable in a production TV. Granted, this is one of the first runs, but we’re pretty sure the review sample we tested was vetted before being sent to us. Hopefully, the problem that was discovered will be addressed, but until LG has a chance to deal with it, there’s no way to know whether the sets arriving for sale in the US will exhibit the problem. Early adopters should be aware, but also understand it was an invisible issue in real-life viewing.
not sure if Vak started seeing these, as they might have been there the whole time, just invisible to the naked eye