In some embodiments, a touch buffer layer may be further provided between the second substrate 310 and the touchscreen layer 700. The touch buffer layer may function to block or reduce an interference signal that may occur when driving the touchscreen layer 700. The touch buffer layer may include an inorganic material such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, aluminum nitride, titanium oxide, and/or titanium nitride, or an organic material such as polyimide, polyester, and/or acryl, and may be formed of any stack thereof.
Because the touch buffer layer and/or the touchscreen layer 700 are formed directly on the second substrate 310 by deposition and/or the like, a separate adhesive layer may not be required on the second substrate 310. Thus, the thickness of the display panel may be reduced.
An optical functional section 800 and a window 900 may be arranged on the touchscreen layer 700. The window 900 may be coupled to a component thereunder, for example, the optical functional section 800, through an adhesive layer such as an optical clear adhesive (OCA).