Display device
According to an aspect, a display device includes: a display portion having a display region; a backlight configured to illuminate the display region from a back side of the display portion, the backlight including a light guide plate, and a light source provided facing a lateral side of the light guide plate and configured to emit light; an antenna electrode wound around, facing a back side of the backlight, and configured to reflect light within the display region in a plan view, the light having entered the light guide plate from the light source; and a plurality of dummy electrodes provided on a part of a plane on which the antenna electrode is provided, the part being in a region unoccupied by the antenna electrode. The dummy electrodes reflect light within the display region in a plan view, the light having entered the light guide plate from the light source.
1. A display device comprising:
a display portion having a display region;
a backlight configured to illuminate the display region from a back side of the display portion, the backlight including
a light guide plate, and
a light source provided facing a lateral side of the light guide plate and configured to emit light;
an antenna electrode wound around, provided facing a back side of the backlight, and configured to reflect light within the display region in a plan view, the light having entered the light guide plate from the light source; and
a plurality of dummy electrodes provided on a part of a plane on which the antenna electrode is provided, the part being in a region unoccupied by the antenna electrode,
wherein the dummy electrodes reflect light within the display region in a plan view, the light having entered the light guide plate from the light source,
wherein each of the dummy electrodes comprises a slit and thin-wire portions spaced apart from each other by the slit,
two of the thin-wire portions adjacent to each other are connected by a wire disposed in the slit, and
a width of the wire is narrower than a width of the slit and narrower than a width of the respective thin-wire portions.
2. The display device according to claim 1 ,
wherein the antenna electrode is formed of a material having the same reflectivity as a material that the dummy electrodes are formed of.
3. The display device according to claim 1 ,
wherein the antenna electrode comprises a slit and thin-wire portions spaced apart from each other by the slit.
4. The display device according to claim 3 ,
wherein, in the antenna electrode, the width of the slit is narrower in a part more distant from the light source, and
wherein, in the antenna electrode, the width of each of the thin-wire portions is wider in a part more distant from the light source.
5. The display device according to claim 1 ,
wherein a gap between adjacent ones of the dummy electrodes, a gap between adjacent parts of the antenna electrode wound around, and a gap between the dummy electrodes and the antenna electrode are sized equally.
6. The display device according to claim 1 ,
wherein, in the dummy electrodes, the width of the slit is narrower in a part more distant from the light source, and
wherein, in the dummy electrodes, the width of each of the thin-wire portions is wider in a part more distant from the light source.
7. The display device according to claim 1 ,
wherein an inner peripheral end of the antenna electrode is led out of the antenna electrode via a bridge wire straddling the antenna electrode outside the display region.
8. The display device according to claim 1 , further comprising:
a detector configured to detect force applied to the display portion,
wherein when the detector detects the force, a drive signal is supplied to a transmission electrode in which the antenna electrode and the dummy electrodes are included,
wherein the display portion includes a reception electrode configured to generate a capacitance between the reception electrode and a corresponding one or more of the antenna electrode and the dummy electrodes, and
wherein the reception electrode is configured to output a detection signal in accordance with a change in the capacitance when the detector detects the force.
9. The display device according to claim 1 ,
wherein the light source is provided in a position facing a lateral side of the light guide plate.
10. A display device comprising:
a display portion having a display region;
a backlight configured to illuminate the display region from a back side of the display portion, the backlight including
a light guide plate,
a light source provided facing a lateral side of the light guide plate and configured to emit light, and
a reflective sheet configured to reflect light that has entered the light guide plate from the light source;
an antenna electrode wound around, provided facing a back side of the backlight, and configured to reflect light within the display region in a plan view, the light having entered the light guide plate from the light source;
a plurality of dummy electrodes provided on a part of a plane on which the antenna electrode is provided, the part being in a region unoccupied by the antenna electrode; and
a detector configured to detect force applied to the display portion,
wherein the dummy electrodes reflect light within the display region in a plan view, the light having entered the light guide plate from the light source,
wherein, when the detector detects the force, a drive signal is supplied to a transmission electrode in which the antenna electrode and the dummy electrodes are included,
wherein the display portion includes a reception electrode configured to generate a capacitance between the reception electrode and a corresponding one or more of the antenna electrode and the dummy electrodes,
wherein the reception electrode is configured to output a detection signal in accordance with a change in the capacitance when the detector detects the force,
wherein each of the dummy electrodes comprises a slit and thin-wire portions spaced apart from each other by the slit,
two of the thin-wire portions adjacent to each other are connected by a wire disposed in the slit, and
a width of the wire is narrower than a width of the slit and narrower than a width of the respective thin-wire portions.
11. The display device according to claim 10 ,
wherein the antenna electrode is formed of a material having the same reflectivity as a material that the dummy electrodes are formed of.
12. The display device according to claim 10 ,
wherein the antenna electrode comprises a slit and thin-wire portions spaced apart from each other by the slit.
13. The display device according to claim 12 ,
wherein, in the antenna electrode, the width of the slit is narrower in a part more distant from the light source, and
wherein, in the antenna electrode, the width of each of the thin-wire portions is wider in a part more distant from the light source.
14. The display device according to claim 10 ,
wherein a gap between adjacent ones of the dummy electrodes, a gap between adjacent parts of the antenna electrode wound around, and a gap between the dummy electrodes and the antenna electrode are sized equally.
15. The display device according to claim 10 ,
wherein, in the dummy electrodes, the width of the slit is narrower in a part more distant from the light source, and
wherein, in the dummy electrodes the width of each of the thin-wire portions is wider in a part more distant from the light source.
16. The display device according to claim 10 ,
wherein an inner peripheral end of the antenna electrode is led out of the antenna electrode via a bridge wire straddling the antenna electrode outside the display region.