Display device with a chip on film
A display device including a display panel including a substrate, pixels provided on the substrate, and first lines connected to the pixels, the display device having a bending area where the display panel is bent. The display panel also includes a chip on film overlapping with a portion of the display panel and having second lines, an anisotropic conductive film provided between the chip on film and the display panel connecting the first lines and the second lines, and a coating layer covering the bending area and one end of the chip on film. In such a device, lines of the chip on film may be prevented from being corroded as they may be spaced apart from an edge of an insulating film.
1 . A display device, comprising:
a display panel comprising a substrate, pixels disposed on the substrate, and first lines electrically connected to the pixels, the display panel comprising a bending area where the display panel is bent;
a polarizing layer disposed on a first surface of the display panel;
a chip on film overlapping an end portion of the display panel and comprising second lines;
a cushion member disposed on a rear surface of the display panel; and
a first coating layer covering the bending area of the display panel and one end of a surface of the chip on film, wherein:
a first boundary portion disposed between the first coating layer and an end portion of the polarizing layer overlaps the cushion member in a cross-sectional view;
a second boundary portion disposed between the first coating layer and one end portion of the chip on film overlaps the cushion member in a cross-sectional view; and
a gap is formed between the cushion member and the bending area of the display panel.
2 . The display device of claim 1 , wherein the first boundary portion is located opposite to the second boundary portion in a cross-sectional view.
3 . The display device of claim 1 , further comprising a second coating layer provided in the end portion of the display panel and covering another surface of the chip on film.
4 . The display device of claim 3 , wherein the first coating layer and the second coating layer are spaced apart from each other.
5 . The display device of claim 3 , wherein the substrate comprises:
a display area in which the pixels are provided;
a non-display area disposed in at least one side of the display area; and
the bending area disposed in the non-display area, and
the non-display area comprises an additional area protruding from a portion of the non-display area, and the display panel is bent in the additional area.
6 . The display device of claim 5 , wherein:
the display panel comprises a first flat area comprising the display area, a second flat area spaced apart from the first flat area, and the bending area disposed between the first flat area and the second flat area; and
the first flat area and the second flat area are parallel to each other.
7 . The display device of claim 6 , wherein the cushion member is disposed between the first flat area and the second flat area in a cross-sectional view.
8 . The display device of claim 6 , wherein:
the first coating layer covers an outer circumference of the display panel in the bending area; and
the first coating layer covers a portion of the first flat area and the second flat area.
9 . The display device of claim 1 , further comprising:
a printed circuit board connected to another end of the chip on film;
a window disposed on the polarizing layer; and
a cover receiving the window, the polarizing layer, the display panel, the cushion member, the first coating layer, the chip on film, and the printed circuit board.
10 . The display device of claim 1 , wherein the cushion member comprises a porous polymer having elasticity.
11 . The display device of claim 1 , wherein the first lines are provided on a neutral plane.
12 . The display device of claim 11 , wherein:
the chip on film comprises:
an insulating film comprising a first surface and a second surface opposite the first surface;
the second lines disposed on the first surface; and
pads disposed on ends of the second lines; and
the pads are spaced apart from an edge of the insulating film in a plan view.
13 . The display device of claim 12 , further comprising a conductive layer electrically connecting the first lines and the second lines,
wherein the conductive layer overlaps the pads of the chip on film, and is spaced apart from the edge of the insulating film in a cross-sectional view.
14 . The display device of claim 13 , wherein:
the chip on film comprises a first area that contacts an end of the insulating film but does not overlap with the conductive layer and a second area that overlaps with the conductive layer; and
a space between the first area of the chip on film and the display panel is filled by the first coating layer.
15 . The display device of claim 14 , wherein each of the pads has a first width and a second width positioned sequentially in a direction moving away from the edge of the insulating film.
16 . The display device of claim 15 , wherein the first width and the second width are different from each other.
17 . The display device of claim 12 , wherein the first coating layer covers a portion of the second surface of the insulating film.
18 . The display device of claim 17 , further comprising a solder resist layer disposed on the first surface of the insulating film and covering at least a portion of the second lines.
19 . A display device, comprising:
a display panel comprising a first flat area, a second flat area spaced apart from the first flat area, and a bending area disposed between the first flat area and the second flat area;
a polarizing layer disposed on a upper surface of the first flat area;
a chip on film disposed on a upper surface of the second flat area;
a cushion member disposed between the first flat area and the second flat area; and
a first coating layer covering a upper surface of the bending area and a side surface of the polarizing layer and a side surface of the chip on film,
wherein the side surface of the polarizing layer and the side surface of the chip on film overlaps the cushion member in a cross-sectional view.
20 . A display device, comprising:
a display panel comprising a substrate defining a thickness direction, pixels disposed on the substrate, and wherein the display panel comprises a bending area where the display panel is bent;
a chip on film overlapping an end portion of the display panel and comprising second lines;
a first coating layer comprising resin covering the bending area of the display panel and a side surface of the chip on film that faces a lateral direction orthogonal to the thickness direction, the first coating layer in direct contact with the side surface of the chip on film; and
a second coating layer covering a side surface of the display panel and a lower surface of the chip on film, the second coating layer being in direct contact with the side surface of the display panel and the lower surface of the chip on film.