I’m sure you’ll agree that 25,000 hours is not an easy sell, even if it is roughly three full years running 24 hours a day. ![]() It would also cause burn-in (more on that later). In the case of my hypothetical linear decay, maximum HDR brightness covering the entirety of a 100,000-hour-rated display would reduce the time to LT50 (operational lifetime to 50 percent brightness-the industry definition for a display’s brightness decaying by half) to a mere 25,000 hours. If applied unevenly, as it actually is, some areas of an OLED display will wear out more quickly than others. For now, I’ll also make the slightly ridiculous assumption that HDR is evenly applied across the display. Hopefully, that 700 nits isn’t pushing the OLEDs beyond the realm of linear decay, so I’ll assume that the four-fold increase in brightness will reduce their lifespan to 25 percent of normal for the duration. Sony’s Bravia XBR65A1E OLED TV produces 175 nits in the brightest areas with standard dynamic range video, but 700 nits in the areas with high dynamic range. As a matter of fact, communications devolved into stone-cold silence once the subject was broached. I sent inquiries regarding OLED wear and tear as it applies to TVs to two OLED vendors-LG and Sony-but received no detailed information in response. Environmental heat also has an effect, but for this article we’ll assume the OLED in question is in a cool place with relatively benign (heat-wise) electronics. OLED lifespan decreases as current increases. The brightness of OLED elements directly correlates to the strength of the current being applied. What does that mean for your OLED TV and its ability to sustain its picture over the long haul? There is no definitive answer today, but there are clues. ![]() They still need to pump more juice into the elements, however, to elevate the top of the range and achieve what is considered the “HDR effect”. OLEDs have a head start on HDR because the lower limit of their luminance range is so much darker than that of LCD TVs. You could say HDR is the yang to OLED’s near-black yin. The real issue, and the reason for this article, is that LG’s 100,000-hour claim preceded the era of HDR (high dynamic range).
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