Sensor-equipped display device

1. A sensor-equipped display device comprising:

a display panel comprising a common electrode;

a sensor comprising a plurality of detection electrodes extending in a first direction and arranged in a second direction crossing the first direction, a plurality of first lead lines, a plurality of second lead lines, and dummy electrodes disposed between neighboring detection electrodes, each of the detection electrodes including a first electrode and a second electrode which are opposed to the common electrode, are divided and extend in the first direction; and

a controller configured to effect switching to either a first mode or a second mode, and to control driving of the common electrode and the detection electrodes,

wherein

in each of the detection electrodes,

the first electrode comprises a first connection line connected to a corresponding first lead line of the first lead lines, and a plurality of first detection lines connected to the first connection line,

the second electrode comprises a second connection line connected to a corresponding second lead line of the second lead lines, and a plurality of second detection lines connected to the second connection line,

the first connection line and the second connection line are opposed to each other in the first direction,

the first lead line and the second lead line are opposed to each other in the first direction,

the first detection lines extend toward the second connection line, and

the second detection lines extend toward the first connection line, and

the dummy electrodes are disposed between neighboring detection line groups each including the first and second detection lines of each of the detection electrodes.

2. The sensor-equipped display device according to claim 1 , wherein

the first electrodes and the second electrodes of the detection electrodes are alternately arranged in the second direction.

3. The sensor-equipped display device according to claim 1 , wherein

the common electrode includes a plurality of divisional electrodes which extend in the second direction and are divided.

4. The sensor-equipped display device according to claim 1 , wherein

the controller is configured to write, in the first mode, a first write signal to the first electrode and the second electrode of each of the detection electrodes, to read from the first electrode a first read signal indicative of a variation of the first write signal, and to read from the second electrode a second read signal indicative of a variation of the first write signal, and

the controller is configured to bundle, in the first mode, two or more first read signals, which were read from two or more detection electrodes located continuous in the second direction among the detection electrodes, into one signal, and to bundle two or more second read signals, which were read from the two or more detection electrodes, into one signal.

5. The sensor-equipped display device according to claim 1 , wherein

the controller is configured to write, in the first mode, a first write signal to the first electrode and the second electrode of each of the detection electrodes, to read from the first electrode a first read signal indicative of a variation of the first write signal, and to read from the second electrode a second read signal indicative of a variation of the first write signal,

the first write signal is a pulse signal, and

a potential of a low level of the pulse signal is, in the first mode, identical to a potential of the common electrode.

6. The sensor-equipped display device according to claim 1 , wherein

the controller is configured to write, in the first mode, a first write signal to the first electrode and the second electrode of each of the detection electrodes, to read from the first electrode a first read signal indicative of a variation of the first write signal, and to read from the second electrode a second read signal indicative of a variation of the first write signal, and

the controller is configured to write, in the first mode, a potential adjustment signal, which includes a waveform identical to a waveform of the first write signal, to the common electrode in synchronism with the first write signal.

7. The sensor-equipped display device according to claim 1 , further comprising:

an insulative substrate located outside the display panel, and opposed to a display area and a non-display area outside the display area of the display panel; and

a shield electrode provided on the insulative substrate and opposed to the non-display area, driving of the shield electrode being controlled by the controller,

wherein

the first lead lines and the second lead lines are located in the non-display area,

the controller is configured to write, in the first mode, a first write signal to the first electrode and the second electrode of each of the detection electrodes, to read from the first electrode a first read signal indicative of a variation of the first write signal, and to read from the second electrode a second read signal indicative of a variation of the first write signal, and

the controller is configured to write, in the first mode, a potential adjustment signal, which includes a waveform identical to a waveform of the first write signal, to the shield electrode in synchronism with the first write signal.

8. The sensor-equipped display device according to claim 7 , further comprising:

a peripheral light-shield layer provided on the insulative substrate and opposed to the non-display area,

wherein

the shield electrode is located between the peripheral light-shield layer and the first and second lead lines.

9. The sensor-equipped display device according to claim 1 , wherein

the display panel includes a pixel electrode, and

the controller is configured to apply, in a display operation period, a voltage between the common electrode and the pixel electrode, to effect switching to the first mode, and to control the driving of the detection electrodes.

10. The sensor-equipped display device according to claim 1 , wherein

each of the dummy electrodes is formed of a plurality of dummy lines which are disposed in parallel to the first and second detection lines, and are disposed substantially at regular intervals.

11. The sensor-equipped display device according to claim 1 , wherein

the dummy electrodes are set in an electrically floating state.