The spat over TV technology between South Korean tech giants Samsung and LG has continued online, with Samsung hinting at the burn-in problem of LG’s organic light-emitting diode TVs, according to industry sources on Tuesday.

Samsung recently posted a 50-second video clip on its YouTube channel, titled “TV Burn-in Checker.” Burn-in, widely known as a major weakness of OLED TVs, refers to the discoloration of pixels caused by displaying static images due to the characteristics of organic materials used for the panels. 

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The Samsung clip included a 10-second display of a red screen and showed burnt-in parts. At the end of the clip, viewers are advised to “get a burn-in free QLED.” QLED stands for quantum dot light-emitting diode.

Last month, LG accused Samsung of misusing the term QLED for a liquid crystal display, filing a complaint with the Fair Trade Commission.

It also produced a similar video clip on YouTube, which featured engineers breaking down the Samsung QLED TV into a QD sheet, LED backlight and LCD panel.

LG’s clip said that Samsung’s QLED TV brand should be called “QD-LCD” in order not to confuse consumers.