Flat panel display with integrated touch screen panel
A flat panel display having an integrated touch screen panel directly formed on a sealing thin film is disclosed. In the display, sensing lines of the touch screen panel are formed to extend to a substrate of the display panel, on which organic light emitting elements are formed, so that the touch screen panel and the display panel are connected to a flexible printed circuit board, thereby simplifying manufacturing processes and decreasing product cost.
1. A display device, comprising:
a substrate comprising a first area having a pixel area and a second area adjacent to the first area;
pixels comprising organic light emitting elements in the pixel area of the substrate;
a sealing thin film covering the first area of the substrate and including an inclined surface at an end of the sealing thin film;
sensing cells formed on the sealing thin film and configured to sense a touch;
sensing lines coupled to the sensing cells and formed on the sealing thin film;
a driving circuit formed on the second area of the substrate; and
a flexible printed circuit board (FPCB) attached to one end of the substrate,
wherein:
at least one of the sensing lines is disposed on the inclined surface of the sealing thin film and on the second area of the substrate;
the inclined surface of the sealing thin film is formed to be inclined downwardly toward the driving circuit;
the at least one of the sensing lines includes an inclined portion along the inclined surface of the sealing thin film;
the sensing lines comprise:
a first group concentrated in a first line area of the second area of the substrate; and
a second group concentrated in a second line area of the second area of the substrate;
the first group of the sensing lines and the second group of the sensing lines extend in the second area of the substrate with the driving circuit interposed therebetween;
the sealing thin film comprises at least one organic layer and at least one inorganic layer;
the at least one inorganic layer includes an inorganic layer disposed on an uppermost portion of the sealing thin film;
the sensing lines are formed on the inorganic layer of the sealing thin film in the second area of the substrate;
the sensing lines comprise a metallic material including aluminum and titanium; and
the sensing lines are electrically connected to the FPCB at the one end of the substrate.
2. The display device according to claim 1 , wherein:
the first group of the sensing lines is closer to a first side of the driving circuit than the second group of the sensing lines; and
the second group of the sensing lines is closer to a second side of the driving circuit opposite to the first side than the first group of the sensing lines.
3. The display device according to claim 2 , wherein the FPCB is spaced apart from the driving circuit in the second area.
4. The display device according to claim 2 , wherein the first group of the sensing lines and the second group of the sensing lines extend toward the FPCB.
5. The display device according to claim 4 , further comprising driving lines configured to drive the pixels and electrically connected to the driving circuit.
6. The display device according to claim 5 , wherein the driving lines extend in the second area.
7. The display device according to claim 1 , wherein a border between the first area and the second area is divided by the at least one organic layer of the sealing thin film.
8. The display device according to claim 1 , further comprising an insulating layer,
wherein:
the sensing cells comprise first sensing cells connected to each other along each line in a first direction and second sensing cells connected to each other along each line in a second direction different from the first direction;
two adjacent first sensing cells are electrically connected by a first connection pattern and two adjacent second sensing cells are electrically connected by a second connection pattern; and
the insulating layer is between the first connection pattern and the second connection pattern.
9. The display device according to claim 8 , wherein:
the sensing lines comprise:
first sensing lines electrically connected to the first sensing cells; and
second sensing lines electrically connected to the second sensing cells;
at least one of the second sensing lines included in the first group comprises:
a first portion extending in the second direction from a corresponding second sensing cell; and
a second portion extending in the first direction from an end of the first portion; and
the other at least one of the second sensing lines included in the second group comprises:
the first portion; and
a third portion extending in a direction opposite to the first direction from the first portion.
10. The display device according to claim 9 , wherein the first portion, the second portion, and the third portion are formed over the sealing thin film.