A method of manufacturing a display apparatus, the method including forming a display device on a substrate; and forming a thin-film encapsulation layer on the display device, the thin-film encapsulation layer including at least one inorganic layer that includes low-temperature viscosity transition (LVT) inorganic materials, wherein forming the thin-film encapsulation layer includes irradiating energy beams toward the thin-film encapsulation layer during formation of the thin-film encapsulation layer.