Display device for facilitating alignment of a pad of a display panel and an element mounted thereon
A display device including a display panel including a base layer, a circuit layer disposed on the base layer, and a pad part having a plurality of pads disposed on the base layer; and a driving chip disposed on the pad part and including a plurality of chip pads. The plurality of pads include a first pad having a smaller area than a corresponding chip pad among the plurality of chip pads and a second pad electrically connected to the circuit layer.
1. A display device comprising:
a display panel comprising a base layer, a circuit layer disposed on the base layer, and a pad part comprising a plurality of pads disposed on the base layer; and
a driving chip disposed on the pad part and comprising a plurality of chip pads,
wherein the plurality of pads comprise:
a first pad having a smaller area than a corresponding chip pad among the plurality of chip pads; and
a second pad electrically connected to the circuit layer.
2. The display device of claim 1 , wherein the plurality of pads are arranged in an M×N matrix form, where each of M and N are integers of 1 or more.
3. The display device of claim 2 , wherein the first pad is disposed in an area where a second row to an M−1th row and a second column to an N−1 column overlap.
4. The display device of claim 1 , wherein the second pad has an area equal to or greater than an area of a corresponding chip pad among the plurality of chip pads.
5. The display device of claim 1 , wherein each of the plurality of chip pads has a first width in a first direction and a second width in a second direction intersecting the first direction; and
the first pad has a third width in the first direction and a fourth width in the second direction.
6. The display device of claim 5 , wherein the first width is greater than the third width.
7. The display device of claim 5 , wherein the second width is greater than the fourth width.
8. The display device of claim 1 , wherein each of the pads and the chip pads has a parallelogram shape.
9. The display device of claim 1 , wherein each of the pads and the chip pads has a rectangular shape.
10. The display device of claim 1 , wherein the base layer comprises a transparent flexible substrate.
11. The display device of claim 1 , wherein the first pad is electrically separated from the circuit layer.
12. The display device of claim 1 , wherein the first pad is electrically connected to the circuit layer.
13. The display device of claim 1 , wherein at least one alignment area is defined in the pad part and the first pad is disposed in the alignment area.
14. The display device of claim 13 , further comprising a plurality of the first pads and the second pads, and the first pads are disposed in the alignment area and the second pads are disposed in a periphery of the alignment area.
15. A display device comprising:
a display panel comprising a plurality of pads arranged in an M×N matrix form, where each of M and N are integers of 1 or more; and
a driving chip comprising a plurality of chip pads electrically coupled with the plurality of pads,
wherein the plurality of pads comprise first pads having a smaller area than a corresponding chip pad among the plurality of chip pads and second pads having an area equal to or larger than an area of a corresponding chip pad among the plurality of chip pads.
16. The display device of claim 15 , wherein the second pads are disposed in a first row, an Mth row, a first column, and an Nth column, and the first pads and the second pads are disposed in an area where a second row to an M−1th row and a second column to an N−1th column overlap.
17. The display device of claim 15 , wherein:
the chip pads have a first width in a first direction and a second width in a second direction intersecting the first direction;
the first pad has a third width in the first direction and a fourth width in the second direction; and
the first width is greater than the third width or the second width is greater than the fourth width.
18. A display device comprising:
a base layer;
a circuit layer disposed on the base layer;
a pad part electrically connected to the circuit layer, disposed on the base layer, and comprising at least one alignment area and a connection area defined on a flat surface; and
a driving chip disposed on the pad part and comprising a plurality of chip pads electrically connected to the circuit layer through the pad part,
wherein:
the pad part comprises first pads disposed in the alignment area, each first pad having a smaller area than a corresponding chip pad among the plurality of chip pads and second pads disposed in the connection area.
19. The display device of claim 18 , wherein the alignment area is defined as being surrounded by the connection area.
20. The display device of claim 18 , wherein the plurality of chip pads have larger areas than the first pads and have smaller areas than the second pads.