What is claimed is:1. A display panel comprising:a substrate including a display area in which a plurality of light emitting diodes are arranged, a circular area and a non-circular area surrounded by the display area and disposed to be spaced apart from each other in a first direction, and a non-display area surrounding the circular area and the non-circular area; anda plurality of data lines extending in a second direction crossing the first direction in the display area, the plurality of data lines being electrically connected to the plurality of light emitting diodes, respectively,wherein the plurality of data lines comprises:a plurality of first data lines bypassing the circular area and disposed along a first side of the circular area in the non-display area;a plurality of second data lines bypassing the circular area and disposed along a second side of the circular area opposite to the first side in the non-display area;a plurality of third data lines bypassing the non-circular area and disposed along a first side of the non-circular area in the non-display area; anda plurality of fourth data lines bypassing the non-circular area and disposed along a second side of the non-circular area opposite to the first side of the non-circular area in the non-display area,wherein a number of the plurality of first data lines is the same as a number of the plurality of second data lines, andwherein a number of the plurality of the third data lines is different from a number of the plurality of fourth data lines.2. The display panel of claim 1, wherein the number of the plurality of the third data lines is greater than the number of the plurality of fourth data lines.3. The display panel of claim 1, wherein bypassing portions of the plurality of second data lines and bypassing portions of the plurality of third data lines are disposed between the circular area and the non-circular area in the non-display area.4. The display panel of claim 3, wherein:a bypassing portion of a data line disposed closest to the first side of the circular area among the plurality of first data lines is substantially symmetric to a bypassing portion of a data line disposed closest to the second side of the circular area among the plurality of second data lines with respect to a first virtual central line which passes through a center of the circular area in the second direction.5. The display panel of claim 3, wherein:bypassing portions of the plurality of first data lines or the plurality of second data lines comprise two bypassing portions adjacent to each other, andone of the two bypassing portions is disposed over an insulating layer and the other of the two bypassing portions is disposed under the insulating layer.6. The display panel of claim 3, wherein:bypassing portions of the plurality of third data lines or the plurality of fourth data lines comprise two bypassing portions adjacent to each other, andone of the two bypassing portions is disposed over an insulating layer and the other of the two bypassing portions is disposed under the insulating layer.7. The display panel of claim 3, wherein:a bypassing portion of a data line disposed closest to the first side of the non-circular area among the plurality of third data lines is substantially asymmetric to a bypassing portion of a data line disposed closest to the second side of the non-circular area among the plurality of fourth data lines with respect to a second virtual central line which passes through a center of the non-circular area in the second direction.8. The display panel of claim 3, wherein a pitch between adjacent two bypassing portions of the plurality of second data lines in the non-display area is less than a pitch between two adjacent second data lines among the plurality of second data lines in the display area.9. The display panel of claim 1, wherein:a first width between the circular area and the non-circular area along the first direction is greater than a second width between a first edge portion of the non-display area and the circular area along the first direction, and a third width between a second edge portion of the non-display area and the non-circular area along the first direction.10. The display panel of claim 1, further comprises a plurality of scan lines extending in the first direction in the display area, the plurality of scan lines comprising:a first scan line disposed on a first side of the circular area and the non-circular area; anda second scan line disposed on a second side of the circular area and the non-circular area opposite to the first side.11. The display panel of claim 1, wherein the non-circular area has an elliptical shape or a quadrangular shape with rounded corners.12. A display panel comprising:a substrate including a display area in which a plurality of light emitting diodes are arranged, a circular area and a non-circular area surrounded by the display area and disposed to be spaced apart from each other in a first direction, and a non-display area surrounding the circular area and the non-circular area;a plurality of data lines extending in a second direction crossing the first direction in the display area, the plurality of data lines being electrically connected to the plurality of light emitting diodes, respectively; anda plurality of scan lines extending in the first direction in the display area, the plurality of scan lines being electrically connected to the plurality of light emitting diodes, respectively,wherein the plurality of scan lines comprises:a plurality of first scan lines bypassing the circular area and the non-circular area, and disposed along a first side of the circular area and the non-circular area; anda plurality of second scan lines bypassing the circular area and the non-circular area, and disposed along a second side of the circular area and the non-circular area opposite to the first side of the circular area and the non-circular area.13. The display panel of claim 12, wherein a number of the plurality of the first scan lines is the same as a number of the plurality of second scan lines.14. The display panel of claim 12, wherein:a pitch between adjacent two bypassing portions of the plurality of first scan lines in the non-display area is less than a pitch between two adjacent first scan lines among the plurality of first scan lines in the display area, anda pitch between adjacent two bypassing portions of the plurality of second scan lines in the non-display area is less than a pitch between two adjacent second scan lines among the plurality of second scan lines in the display area.15. The display panel of claim 12, wherein:a scan line disposed closest to the first side of the circular area and the non-circular area among the plurality of first scan lines is substantially symmetric to a scan line disposed closest to the second side of the circular area and the non-circular area among the plurality of second scan lines with respect to a virtual central line which passes through a center of the circular area and a center of the non-circular area.16. The display panel of claim 15, wherein:a first width between the circular area and the non-circular area along the first direction is greater than a second width between a first edge portion of the non-display area and the circular area along the first direction, and a third width between a second edge portion of the non-display area and the non-circular area along the first direction.17. The display panel of claim 12, wherein the plurality of data lines comprises:a plurality of first data lines bypassing the circular area along one side of the circular area and disposed in the non-display area;a plurality of second data lines bypassing the circular area along the other side of the circular area opposite to the one side of the circular area and disposed in the non-display area;a plurality of third data lines bypassing the non-circular area along one side of the non-circular area and disposed in the non-display area; anda plurality of fourth data lines bypassing the non-circular area along the other side of the non-circular area opposite to the side of the non-circular area and disposed in the non-display area.18. The display panel of claim 17, wherein a number of the plurality of the third data lines is greater than a number of the plurality of fourth data lines.19. The display panel of claim 18, wherein a number of the plurality of first data lines is a same as a number of the plurality of second data lines.20. The display panel of claim 17, wherein bypassing portions of the plurality of second data lines and bypassing portions of the plurality of third data lines are disposed between the circular area and the non-circular area.21. The display panel of claim 20, wherein:a bypassing portion of a data line disposed closest to the one side of the circular area among the plurality of first data lines is substantially symmetric to a bypassing portion of a data line disposed closest to the other side of the circular area among the plurality of second data lines with respect to a first virtual central line which passes through a center of the circular area in the second direction.22. The display panel of claim 20, wherein:a bypassing portion of a data line disposed closest to the one side of the non-circular area among the plurality of third data lines is substantially asymmetric to a bypassing portion of a data line disposed closest to the other side of the non-circular area among the plurality of fourth data lines with respect to a second virtual central line which passes through a center of the non-circular area in the second direction.23. The display panel of claim 17, wherein:bypassing portions of the plurality of first data lines or the plurality of second data lines comprise two bypassing portions disposed adjacent to each other,one of the two bypassing portions is disposed over an insulating layer and the other of the two bypassing portions is under the insulating layer,bypassing portions of the plurality of third data lines or the plurality of fourth data lines comprise two bypassing portions disposed adjacent to each other, andone of the two bypassing portions is disposed over an insulating layer and the other of the two bypassing portions is disposed under the insulating layer.24. The display panel of claim 12, wherein the non-circular area has an elliptical shape or a quadrangular shape with rounded corners.