Patent ID: 8786557

Claim:
A display device having a capacitive touch sensor, comprising: a plurality of display pixel electrodes; a common electrode facing the display pixel electrodes; a display function layer having an image display function; a display control circuit that performs an image display control by applying a voltage for display between the display pixel electrode and the common electrode, based on an image signal, so that the display function of the display function layer is exhibited; a pixel substrate, the pixel substrate including a circuit substrate in which the display control circuit is located; an opposed substrate facing the pixel substrate, the display function layer being interposed between the pixel substrate and the opposed substrate; and a touch detection electrode for the capacitive touch sensor, the touch detection electrode and the common electrode both being disposed in the pixel substrate and arranged such that a capacitance exists between the common electrode and the touch detection electrode, wherein, the common electrode is on the circuit substrate inside a display region, the touch detection electrode is on the circuit substrate in a frame region surrounding the display region, the touch detection electrode being separate from the common electrode, and the common electrode and the touch detection electrode are formed along same plane on the circuit substrate such that the common electrode and the touch detection electrode are disposed side by side and the capacitance is formed between the common electrode and the touch detection electrode in a lateral direction that runs parallel to the plane on which both the touch detection electrode and the common electrode are located.