Display device with touch sensor
First Claim
Patent Images
1. A display device having a capacitive touch sensor, comprising:
- a first substrate;
a second substrate facing the first substrate;
a display function layer having an image display function, the display function layer being interposed between the first substrate and the second substrate;
a plurality of display pixel electrodes;
a common electrode facing the display pixel electrodes, the display pixel electrodes and the common electrode being disposed between the first substrate and the display function layer;
a 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 touch detection electrode of the capacitive touch sensor, the touch detection electrode and the common electrode being arranged such that a capacitance is formed between the common electrode and the touch detection electrode; and
a touch detection circuit that detects a position touched by an object based on a detection signal obtained from the touch detection electrode,wherein,the touch detection electrode is between the second substrate and the display function layer, andthe second substrate is interposed between a first polarizing plate and the first substrate.
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Abstract
A common electrode for a display used both in driving the display and touch detection. An existing common drive signal both as a drive signal for the touch sensor. A capacitance is formed between the common electrode and a touch sensor electrode. Touch detection is performed by utilizing a change of this capacitance caused by a finger touch of a user. The display device with a touch sensor can be used in a mobile device.
24 Citations
15 Claims
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1. A display device having a capacitive touch sensor, comprising:
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a first substrate; a second substrate facing the first substrate; a display function layer having an image display function, the display function layer being interposed between the first substrate and the second substrate; a plurality of display pixel electrodes; a common electrode facing the display pixel electrodes, the display pixel electrodes and the common electrode being disposed between the first substrate and the display function layer; a 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 touch detection electrode of the capacitive touch sensor, the touch detection electrode and the common electrode being arranged such that a capacitance is formed between the common electrode and the touch detection electrode; and a touch detection circuit that detects a position touched by an object based on a detection signal obtained from the touch detection electrode, wherein, the touch detection electrode is between the second substrate and the display function layer, and the second substrate is interposed between a first polarizing plate and the first substrate. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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2. A display device having a capacitive touch sensor, comprising:
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a first substrate; a second substrate facing the first substrate; a display function layer having an image display function, the display function layer being interposed between the first substrate and the second substrate; a plurality of display pixel electrodes; a common electrode facing the display pixel electrodes, the display pixel electrodes and the common electrode being disposed between the first substrate and the display function layer; a 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 touch detection electrode disposed opposite to the common electrode, the touch detection electrode and the common electrode being arranged such that a capacitance is formed between the common electrode and the touch detection electrode; and a touch detection circuit that detects a position touched by an object based on a detection signal obtained from the touch detection electrode, wherein, the touch detection electrode is between the second substrate and the display function layer, and the second substrate is interposed between a first polarizing plate and the first substrate, and the touch detection electrode comprises a plurality of individual electrodes, the plurality of individual electrodes being formed in one layer on a same plane. - View Dependent Claims (3, 4, 14)
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5. A display device having a capacitive touch sensor, comprising:
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a first substrate; second substrate facing the first substrate; a display function layer having an image display function, the display function layer being interposed between the first substrate and the second substrate; a plurality of display pixel electrodes; a common electrode facing the display pixel electrodes, the display pixel electrodes and the common electrode being disposed between the first substrate and the display function layer; a control circuit that controls display of an image by applying a voltage 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 touch detection electrode, the touch detection electrode overlapping the common electrode, the touch detection electrode and the common electrode being arranged such that a capacitance is formed between the common electrode and the touch detection electrode; and a touch detection circuit that detects a position touched by an object based on a detection signal obtained from the touch detection electrode, wherein, the touch detection electrode is between the second substrate and the display function layer, and the second substrate is interposed between a first polarizing plate and the first substrate, and the common electrode is divided into a plurality of elongated electrode members. - View Dependent Claims (6, 7, 15)
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Specification