Display device with touch detection function and electronic apparatus

摘要

A display device with a touch detection function includes a control device that performs, in normal operation mode, image display control so as to exhibit an image display function of a display function layer based on an image signal and performs touch detection control; a touch detecting unit that detects, in the normal operation mode, a position of an object in proximity to or in contact with the touch detection electrode based on a detection signal transmitted from the touch detection electrode; and a touch-detection controller that detects, in sleep mode, the proximity of the object to or the contact thereof with the touch detection electrode. When the touch-detection controller detects the proximity of the object to or the contact thereof with the touch detection electrode in the sleep mode, the control device controls a pixel electrode to a predetermined potential, and thereafter supplies a touch drive signal to a drive electrode.

主权项

1. A display device with a touch detection function that has a normal operation mode for performing image display and touch detection and a sleep mode for performing touch detection with reduced power consumption, the sleep mode including a first sleep mode and a second sleep mode, the display device comprising:
a display area in which a plurality of pixel electrodes are arranged in a matrix on a substrate; a drive electrode that is arranged opposite to the pixel electrodes and is divided into a plurality of portions; a touch detection electrode that is arranged opposite to the drive electrode and forms a capacitance with the drive electrode; a display function layer that has an image display function for displaying an image in the display area; a control device that:
in the normal operation mode, performs image display control using a normal power supply voltage, so as to apply a display drive voltage between the pixel electrode and the drive electrode based on an image signal to exhibit the image display function of the display function layer, and performs touch detection control so as to supply a touch drive signal to the drive electrode; andin the second sleep mode, uses a sleep power supply voltage to set the pixel electrode to a predetermined potential before the drive electrode is supplied with the touch drive signal, the sleep power supply voltage being lower than the normal power supply voltage, a touch detecting unit that detects, in the normal operation mode, a position of an object in proximity to or in contact with the touch detection electrode based on a detection signal transmitted from the touch detection electrode; and a touch-detection controller configured to:
in the first sleep mode, detect the proximity of the object to or the contact thereof with the touch detection electrode using self-capacitance of the touch detection electrode, and shift from the first sleep mode to the second sleep mode when detecting the proximity of the object; andin the second sleep mode, detect the proximity of the object to or the contact thereof using mutual capacitance between the touch detection electrode and the drive electrode, and shift from the second sleep mode to the normal operation mode, when detecting the proximity of the object.