Display device
A display device is disclosed that comprises a display panel including a plurality of subpixels, a source film coupled to a side of the display panel and on which a source driving integrated circuit supplying a data voltage to the display panel is implemented, and a source printed circuit board on which a low-potential voltage line transmitting a base voltage to the display panel through the source film is disposed in a closed loop structure.
1 . A display device, comprising:
a display panel including a plurality of subpixels;
a source film connected to a side of the display panel;
a source driving integrated circuit on the source film, the source driving integrated circuit configured to supply a data voltage to the display panel; and
a source printed circuit board connected to the source film, wherein the source printed circuit board includes:
a first source printed circuit board layer including a low-potential voltage line that has a closed loop structure in a plan view of the display device and supplies a base voltage to the display panel through the source film,
a second source printed circuit board layer including a high-potential voltage line in the plan view of the display device, the high-potential voltage line transmitting a high potential voltage that is greater than the base voltage, and
an insulating material between the first source printed circuit board layer and the second source printed circuit board layer.
2 . The display device of claim 1 , wherein the source printed circuit board includes a timing controller configured to supply image data to the source driving integrated circuit and the source driving integrated circuit generates the data voltage based on the image data.
3 . The display device of claim 1 , wherein the source printed circuit board includes a power management circuit that is configured to supply the base voltage.
4 . The display device of claim 1 , wherein the low-potential voltage line includes:
a first low-potential voltage line located in a first area of the source printed circuit board;
a second low-potential voltage line located in a second area of the source printed circuit board that is spaced apart from the first area; and
a pair of third low-potential voltage lines that connect the first low-potential voltage line to the second low-potential voltage line in a third area of the source printed circuit board.
5 . The display device of claim 4 , wherein the first area is adjacent to the display panel and extends in a direction along a long axis of the display panel.
6 . The display device of claim 5 , wherein the second area is farther from the display panel than the first area and extends in the direction along the long axis of the display panel.
7 . The display device of claim 6 , wherein the third area is an area extending in a direction that intersects the long axis of the display panel on a left side and a right side of the source printed circuit board.
8 . The display device of claim 4 , wherein a first width of the first low-potential voltage line is greater than a second width of the second low-potential voltage line.
9 . The display device of claim 4 , wherein a sum of a first width of the first low-potential voltage line and a second width of the second low-potential voltage line is equal to a predetermined reference value.
10 . The display device of claim 9 , wherein the first width of the first low-potential voltage line is a range of 60% to 70% of the predetermined reference value.
11 . The display device of claim 9 , wherein the second width of the second low-potential voltage line is a range of 30% to 40% of the predetermined reference value.
12 . The display device of claim 4 , wherein a sum of a first width of the first low-potential voltage line and a second width of the second low-potential voltage line is equal to a third width of each third low-potential voltage line from the pair.
13 . The display device of claim 1 , further comprising:
a low-potential connection line extending from the low-potential voltage line and overlapping the source film in the plan view, the low-potential connection line electrically connected to the display panel.
14 . The display device of claim 13 , wherein the low-potential connection line includes:
a first low-potential connection line at a first side of the source driving integrated circuit; and
a second low-potential connection line at a second side of the source driving integrated circuit.
15 . The display device of claim 1 , wherein the high-potential voltage line has a closed loop structure in the plan view.