Display device
According to one embodiment, a display device includes a display panel including a first substrate including a display area and a first detection electrode, and a second force sensing electrode opposing the display area and the first detection electrode with a gap therebetween. The second force sensing electrode includes a central portion opposing a central portion of the display region, a peripheral portion located to surround the central portion and a reinforcing structure which reinforces the peripheral portion, and the gap between the central portion and the first detection electrode is greater than a gap between the peripheral portion and the first detection electrode.
1. A display device comprising:
a display panel comprising a first substrate including a display area and a first detection electrode; and
a case formed of a metal and including a bottom wall which constitutes a second force sensing electrode opposing the display area and the first detection electrode with a gap therebetween, and the second force sensing electrode comprising a central portion opposing a central portion of the display area and bent to form a projection projecting in a direction away from the display panel and the first detection electrode, a peripheral portion formed flat and located to surround the central portion, and a reinforcing structure which reinforces the peripheral portion, the gap between the central portion and the first detection electrode being greater than a gap between the peripheral portion and the first detection electrode, wherein the projection forms the reinforcing structure.
2. The display device of claim 1 , wherein
the reinforcing structure comprises a reinforcing rib on the peripheral portion of the second force sensing electrode.
3. The display device of claim 2 , wherein
the reinforcing rib comprises an annular rib provided around the central portion and a plurality of radial ribs extending respectively from the annular rib to respective side edges of the peripheral portion.
4. The display device of claim 2 , wherein
the reinforcing rib comprises a first annular rib provided around the central portion, a second annular rib provided around the first annular rib, and a plurality of radial ribs extending respectively from the first annular rib via the second annular rib to respective side edges of the peripheral portion.
5. The display device of claim 1 , wherein,
the second force sensing electrode comprises a recess formed in the central portion, and a thickness of the peripheral portion is greater than that of the central portion.
6. The display device of claim 5 , wherein
the reinforcing structure comprises a reinforcing plate comprising a hole in the central portion to form the recess and overlaid on the peripheral portion of the second force sensing electrode.
7. The display device of claim 1 , wherein
the projection has a circular or elliptical cross section, and projects curvedly in a direction away from the display panel.
8. The display device of claim 1 , wherein
the projection has a belt-shape or curved shape and extends parallel to one side edge of the second force sensing electrode.
9. The display device of claim 1 , wherein
the display panel comprises a second substrate opposed to the first substrate with a gap therebetween, and a liquid crystal layer between the first substrate and the second substrate,
the second force sensing electrode is disposed to oppose the first substrate, and
which further comprises a backlight device between the first substrate and the second force sensing electrode.
10. The display device of claim 9 , wherein
the backlight device comprises a reflective sheet on the second force sensing electrode, a light guide on the reflective sheet, and an optical sheet on the light guide to oppose the first substrate with a gap therebetween.
11. The display device of claim 9 , wherein
the reinforcing structure comprises a reinforcing rib on the peripheral portion of the second force sensing electrode.
12. The display device of claim 9 , wherein
the second force sensing electrode comprises a recess formed in the central portion, and a thickness of the peripheral portion is greater than that of the central portion.