Display device including multiple flexible printed circuit boards and electrode, line, and via interconnections for series-disposed light emitting diodes
A display device according to an embodiment of the present disclosure includes a main FPCB including a plurality of LEDs in a block unit on one surface and a connector connected to the LEDs on the other surface, a sub-FPCB connected to the connector of the main FPCB, and a cover bottom in which the main FPCB is disposed and the sub-FPCB is connected to the outside through an open area. In each block, the plurality of LEDs is disposed in series by a plurality of first connection electrodes and second connection electrodes. Also, wherein the first and second via holes are disposed within the blocks, and one end of the first connection electrode and one end of the second connection electrode are exposed by a first via hole and a second via hole. Therefore, it is possible to reduce a routing area and a bezel area.
1 . A display device, comprising:
a main flexible printed circuit board (FPCB) including a plurality of light emitting diodes (LEDs) in a plurality of blocks on one surface, and a connector connected to the plurality of LEDs on another surface;
a sub-FPCB connected to the connector of the main FPCB;
a cover bottom in which the main FPCB is disposed and the sub-FPCB is connected to the outside through an open area; and
a plurality of first connection lines disposed on the main FPCB in a row direction, wherein;
in each of the plurality of blocks, LEDs of the plurality of LEDs therein are disposed in series by a plurality of first connection electrodes and second connection electrodes, wherein first via holes and second via holes are disposed within the plurality of blocks;
one end of the first connection electrode is exposed by a respective one of the first via holes, and one end of the second connection electrode is exposed by a respective one of the second via holes;
the first connection electrode is located on an anode side of the LEDs, and the second connection electrode is located on a cathode side of the LEDs; and
the first connection electrodes of the plurality of LEDs are connected to each other by the plurality of first connection lines through the first via holes of the plurality of LEDs in the row direction.
2 . The display device according to claim 1 , wherein the plurality of LEDs are not disposed at a position facing the open area.
3 . The display device according to claim 1 , wherein the plurality of LEDs is disposed at a position facing the open area.
4 . The display device according to claim 1 , wherein the first via hole and the second via hole are disposed in the same line in a column direction.
5 . The display device according to claim 4 , wherein portions connecting the first connection electrode and the second connection electrode to one of the plurality of first connection lines and a second connection line, respectively, and the first and second via holes are located in the same line in the column direction.
6 . The display device according to claim 1 , wherein the plurality of first connection lines is provided in each column, and blocks in the same column except a block under the open area are connected to each other by the same first connection line.
7 . The display device according to claim 6 , wherein one end of each of the plurality of first connection lines is connected to the first connection electrode of a respective block on the open area through the first via hole, and the first connection electrodes of the blocks on and under the open area are connected to each other by a third connection line.
8 . The display device according to claim 7 , wherein the block under the open area further includes a first sub-connection line, and one end of the first sub-connection line is connected to the first connection electrode through the first via hole and the other end is extended to the open area.
9 . The display device according to claim 8 , wherein a plurality of second connection lines is provided in each column, and the second connection lines are providing having number corresponding to the number of blocks disposed in each column except the block under the open area.
10 . The display device according to claim 9 , wherein in the same column, first ends of the second connection electrodes of blocks in respective rows are connected to the second connection lines through the second via holes of the blocks in the respective rows.
11 . The display device according to claim 10 , wherein
in the same column, one end of the second connection electrode of a block in a first row is connected to the second connection line disposed first on the leftmost side of the same column through the second via hole of the block in the first row,
one end of the second connection electrode of a block in a second row is connected to the second connection line disposed second in the same column through the second via hole of the block in the second row,
one end of the second connection electrode of a block in an n−1th row is connected to the second connection line disposed last on the rightmost side of the same column through the second via hole of the block in the n−1th row,
n refers to the total number of blocks in each row, and
the block in the n−1th row refers to the block on the open area.
12 . The display device according to claim 11 , wherein a block in an nth row further includes a second sub-connection line, and one end of the second sub-connection line is connected to the second connection electrode through the second via hole and the other end is extended to the open area.
13 . The display device according to claim 11 , wherein in the block in the n−1th row, the plurality of second connection lines is bent toward a center of the open area while avoiding the second via hole and thus is more densely disposed in the open area.