Eidos Display, LLC v. AU Optronics Corp., No. 14-1254 (Fed. Cir. 2015)Annotate this Case
Eidos alleged that the Display Manufacturers infringed claim 1 of the 958 patent, which is directed toward manufacturing processes for an electro-optical device, such as a liquid crystal display (LCD). The specification of the patent contains 17 embodiments, each identified by a letter. Each embodiment describes a manufacturing process that reduces the number of photolithographic steps in creating an LCD panel compared to prior art processes, lowering the production cost and improving yield and production efficiency. Each embodiment is broken down into a series of “forming” steps that deposit material, such as metal, insulator, or passivation material, on the substrate or previous layers, plus a series of “photolithographic” steps that etch or remove portions of previously-formed material. The district court entered summary judgment, finding the claim invalid as indefinite. The Federal Circuit reversed. The claim, when read in light of the specification and prosecution history, informed with reasonable certainty those skilled in the art at the time the patent was filed about the scope of the claimed invention.