TCL CSOT has filed a patent infringement suit against Samsung Electronics, Walmart, and Best Buy, saying that the companies are selling smartphones, laptops and wearable devices with AMOLED displays that infringe upon CSOT's patents.
CSOT includes three patents in the law suit. The first is US#12,133,429, that describes an OLED panel structure where the metal shielding under the TFT pixel circuits is connected to power lines via through-holes arranged so that the current always flows along the shortest, straight path between holes.
The second patent is US#11,957,031 - describing a polarizer-free flexible OLED device in which the bend area is filled with a protective UV glue and mechanically supported, and the entire stack is dimensioned so there is always a defined gap between the cover plate and the protective layer in the overlap region - thus reducing the risk of panel/module cracking in narrow‑bezel wrap designs.
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