Light emitting display apparatus
According to the present disclosure, the light distribution of a light emitting display apparatus is effectively controlled by asymmetrically disposing a protruding portion of a curved surface area of the light emitting display apparatus to minimize a degradation of a luminance in the curved surface area and a difference in a color sense between a flat surface area and the curved surface area of the light emitting display apparatus.
1. A light emitting display apparatus, comprising:
a display panel including a plurality of sub pixels; and
a cover member including a flat surface area and a curved surface area, and covering the display panel,
wherein the display panel includes:
a substrate in which the plurality of sub pixels is disposed;
an over coating layer disposed on the substrate, and including a base portion and a protruding portion protruding from the base portion;
a plurality of first electrodes included in a plurality of sub pixels, and disposed to cover the base portion and a side portion of the protruding portion;
a bank layer disposed on some of the plurality of first electrodes in non-emission areas to define an emission area and a non-emission area for each of the plurality of sub pixels;
a light emitting layer included in the plurality of sub pixels, and disposed on the plurality of first electrodes and the bank layer; and
a second electrode included in the plurality of sub pixels, and disposed on the light emitting layer,
wherein the plurality of sub pixels include a first sub pixel disposed on the substrate corresponding to the flat surface area of the cover member and a second sub pixel disposed on the substrate corresponding to the curved surface area of the cover member,
the protruding portion of the over coating layer is disposed on a first side of an emission area of the second subpixel, the first side being farther from the flat surface area of the cover member than a second side of the emission area of the second sub pixel,
an entire upper surface and an entire lower surface of the display panel are each flat,
an entire lower surface of the cover member is flat,
an upper surface of the cover member corresponding to the curved surface area of the cover member has a curved surface structure, and
the protruding portion does not overlap the emission area, and the first electrode is disposed parallel to an upper surface of the base portion in the emission area.
2. The light emitting display apparatus according to claim 1 , wherein a slope of the curved surface area of the cover member increases as a distance from the flat surface area increases.
3. The light emitting display apparatus according to claim 1 , wherein the protruding portion of the over coating layer is disposed on two opposite sides of the emission area of the first sub pixel, with a same height.
4. The light emitting display apparatus according to claim 1 , wherein the protruding portion disposed in the second sub pixel includes:
a first protruding portion disposed on the first side of the emission area of the second sub pixel, and
a second protruding portion having a height lower than a height of the first protruding portion, and disposed on the second side of the emission area of the second sub pixel, and
wherein the second protruding portion is disposed to be closer to the flat surface area of the cover member than the first protruding portion.
5. The light emitting display apparatus according to claim 4 , wherein a ratio of the height of the second protruding portion to the height of the first protruding portion is approximately 1:1.5 to approximately 1:3.
6. The light emitting display apparatus according to claim 4 , wherein the protruding portion disposed in the second sub pixel further includes a third protruding portion and a fourth protruding portion which connect the first protruding portion and the second protruding portion, and
heights of the third protruding portion and the fourth protruding portion increase toward the first protruding portion.
7. The light emitting display apparatus according to claim 6 , wherein the first protruding portion to the fourth protruding portion are disposed to enclose the emission area of the second sub pixel.
8. The light emitting display apparatus according to claim 4 , wherein the height of the first protruding portion increases as a distance from the flat surface area increases.
9. The light emitting display apparatus according to claim 4 , wherein a difference between the height of the first protruding portion and the height of the second protruding portion increases as an angle formed by the flat surface area and the curved surface area increases.
10. The light emitting display apparatus according to claim 1 , wherein the plurality of sub pixels further includes a third sub pixel disposed on the substrate corresponding to the curved surface area of the cover member,
the third sub pixel is disposed to be farther from the flat surface area than the second sub pixel,
the protruding portion in the third sub pixel is disposed on one side farther from the flat surface area among two sides of an emission area of the third sub pixel, and
the protrusion portion in the third sub pixel has a height greater than a height of the protruding portion disposed in the second sub pixel.
11. The light emitting display apparatus according to claim 10 , wherein the protruding portion disposed in the second sub pixel includes:
a first protruding portion disposed in the first side of the emission area of the second sub pixel; and
a second protruding portion having a lower height than the first protruding portion in the second sub pixel, and disposed on the second side of the emission area of the second sub-pixel,
wherein the protruding portion disposed in the third sub pixel includes:
a first protruding portion disposed in one side of the emission area of the third sub pixel; and
a second protruding portion having a lower height than the first protruding portion of the third sub pixel, and disposed on another side of the emission area of the third sub pixel, and
wherein the height of the first protruding portion of the third sub pixel is higher than the height of the first protruding portion of the second sub pixel.
12. The light emitting display apparatus according to claim 11 , wherein a slope angle of the curved surface area corresponding to the third sub pixel is larger than a slope angle of the curved surface area corresponding to the second sub pixel.