CSOT, the display arm of TCL went after Samsung, Walmart, and Best Buy in federal court, accusing them of selling devices loaded with AMOLED screens that step all over three patents the Chinese company holds.

Wuhan China Star Optoelectronics Semiconductor Display Technology, the TCL subsidiary that filed the suit, didn’t mess around with the scope. Laptops, wearables, and Google Pixel phones are all in the crosshairs.

This countersuit follows Samsung’s previous legal action against TCL in June, when Samsung lobbed its own infringement claims at the Chinese display maker over OLED pixel tech used in TCL’s phones.

The lawsuit, filed in the Eastern District of Texas, lands TCL squarely in the ring with Samsung on terms it thinks it can win, via OLEDInfo.

What’s surfaced here is TCL’s willingness to drag two massive US retailers. Walmart and Best Buy are the distribution channels that get these devices into American hands, and including them puts financial pressure on everyone involved to settle.

If TCL wins or settles favorably, Samsung’s going to have to either license these patents, redesign parts of its OLED stack, or keep fighting in court. Expect Walmart and Best Buy to pressure Samsung for pricing concessions to cover potential liability.

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