Display device and method for detecting bending position of display device
A display device can include a bendable display panel configured to display an image, and a piezoelectric element array film overlapping the display panel. The piezoelectric element array film can include piezoelectric power generation elements arranged in a matrix structure, and is configured to detect a capacitance change amount generated in the piezoelectric power generation elements according to bending of the display panel. The display device can further include a read-out circuit configured to receive and process a bending detection signal including the capacitance change amount generated in the piezoelectric power generation elements, and a read-out processor configured to detect whether bending of the display panel occurs and a position where the bending occurs, based on the bending detection signal.
1 . A display device, comprising:
a bendable display panel configured to display an image;
a piezoelectric element array film overlapping the display panel, having piezoelectric power generation elements arranged in a matrix structure, and configured to detect a capacitance change amount generated in the piezoelectric power generation elements according to bending of the display panel;
a read-out circuit configured to receive and process a bending detection signal including the capacitance change amount generated in the piezoelectric power generation elements; and
a read-out processor configured to detect whether bending of the display panel occurs and a position where the bending occurs, based on the bending detection signal,
wherein the piezoelectric element array film includes unit sections divided into a matrix structure,
wherein each of the unit sections overlaps an area in which a plurality of subpixels are disposed,
wherein the unit sections of the piezoelectric element array film are disposed adjacent to each other on a same line in a horizontal direction,
wherein the unit sections include a first unit section adjacent to a bezel area, a third unit section adjacent to a central area, and a second unit section disposed between the first unit section and the third unit section,
wherein one of the piezoelectric power generation elements includes:
a first capacitor including a first face electrode provided in each of the first unit section, the second unit section, and the third unit section, and
a second face electrode spaced apart from and facing the first face electrode by a predetermined interval,
wherein a first bending detection line is connected one-to-one between the first face electrode and the read-out circuit, and
wherein a second bending detection line is connected one-to-one between the second face electrode and the read-out circuit, in each of the first unit section, the second unit section, and the third unit section.
2 . The display device of claim 1 , wherein areas, in which the first capacitors provided in the first unit section, the second unit section, and the third unit section, respectively, occupy a plane of each unit section, are the same.
3 . The display device of claim 2 , wherein the read-out processor compares the capacitance change amount detected for each unit section with a preset bending occurrence estimation range, and
wherein bending occurrence estimation ranges set for the first capacitors having different areas occupying the plane for each unit section are different from each other.
4 . The display device of claim 1 , wherein the read-out processor compares the capacitance change amount detected for each unit section with a preset bending occurrence estimation range.
5 . A display device, comprising:
a bendable display panel configured to display an image;
a piezoelectric element array film overlapping the display panel, having piezoelectric power generation elements arranged in a matrix structure, and configured to detect a capacitance change amount generated in the piezoelectric power generation elements according to bending of the display panel;
a read-out circuit configured to receive and process a bending detection signal including the capacitance change amount generated in the piezoelectric power generation elements; and
a read-out processor configured to detect whether bending of the display panel occurs and a position where the bending occurs, based on the bending detection signal,
wherein the piezoelectric element array film includes unit sections divided into a matrix structure,
wherein each of the unit sections overlaps an area in which a plurality of subpixels are disposed,
wherein the unit sections of the piezoelectric element array film are disposed adjacent to each other on a same line in a horizontal direction,
wherein the unit sections include a first unit section adjacent to a bezel area, a third unit section adjacent to a central area, and a second unit section disposed between the first unit section and the third unit section,
wherein one of the piezoelectric power generation elements includes:
a first capacitor including a first face electrode provided in each of the first unit section, the second unit section, and the third unit section, and
a second face electrode spaced apart from and facing the first face electrode by a predetermined interval,
wherein areas in which the first capacitors provided in the first unit section, the second unit section, and the third unit section, respectively, occupy a plane of each unit section are the same,
wherein the read-out processor compares the capacitance change amount detected for each unit section with a preset bending occurrence estimation range,
wherein bending occurrence estimation ranges set for the first capacitors having different areas occupying the plane for each unit section are different from each other, and
wherein the bending occurrence estimation ranges set for the first capacitors provided in each of the first unit section, the second unit section, and the third unit section do not overlap with each other.