Circuit board and display device including the same
A circuit board includes a base substrate, and a connection structure disposed on the base substrate, and connected to the base substrate by an accessing part. The connection structure includes a first connection electrode, a second connection electrode disposed in a same layer as the first connection electrode, a third connection electrode connected to the first connection electrode on the first connection electrode, and a fourth connection electrode connected to the second connection electrode on the second connection electrode, and disposed in a same layer as the third connection electrode.
1. A circuit board comprising:
a base substrate separate from and configured to connect to a display panel; and
a connection structure disposed on the base substrate, and connected to the base substrate by an accessing part, the connection structure including:
a first connection electrode disposed in a first layer;
a second connection electrode disposed in the first layer;
a third connection electrode connected to the first connection electrode and disposed on the first connection electrode, and disposed in a second layer;
a fourth connection electrode connected to the second connection electrode and disposed on the second connection electrode, and disposed in the second layer, and
a signal electrode disposed in the first layer,
wherein the signal electrode is connected to a signal line, which transmits a signal from the base substrate to the display panel to display an image on the display panel,
wherein the display panel includes a touch sensing layer disposed thereon,
wherein the touch sensing layer is connected to the first connection electrode by a first touch line, and is connected to the second connection electrode by a second touch line, and
wherein at least one of the first touch line and the second touch line includes a resistance value increasing portion, and the resistance value increasing portion has a meander shape.
2. The circuit board of claim 1 , wherein the accessing part is connected to the base substrate by a surface mount technology.
3. The circuit board of claim 1 , wherein the accessing part is connected to the base substrate by a solder.
4. The circuit board of claim 1 , wherein the accessing part is connected to the base substrate by a connector.
5. The circuit board of claim 1 , wherein the accessing part is connected to the base substrate by an anisotropic conductive film.
6. The circuit board of claim 1 , wherein the connection structure further includes:
a fifth connection electrode disposed in the first layer; and
a sixth connection electrode connected to the fifth connection electrode on the fifth connection electrode.
7. The circuit board of claim 1 , further comprising:
a touch driver disposed on the connection structure and connected to the connection structure.
8. The circuit board of claim 1 , further comprising:
a touch driver disposed on the base substrate and connected to the connection structure.
9. The circuit board of claim 1 , wherein the connection structure further includes a shielding layer disposed between a layer on which the first connection electrode and the second connection electrode are disposed and a layer on which the third connection electrode and the fourth connection electrode are disposed.
10. A display device comprising:
a display structure; and
a circuit board separate from and connected to the display structure, the circuit board including:
a base substrate; and
a connection structure disposed on the base substrate, and connected to the base substrate by an accessing part, the connection structure including:
a first connection electrode disposed in a first layer;
a second connection electrode disposed in the first layer;
a third connection electrode connected to the first connection electrode and disposed on the first connection electrode, and disposed in a second layer;
a fourth connection electrode connected to the second connection electrode and disposed on the second connection electrode, and disposed in the second layer, and
a signal electrode disposed in the first layer,
wherein the signal electrode is connected to the display structure to display an image,
wherein the display structure further includes:
a display substrate including a display area and a non-display area surrounding the display area;
a display panel disposed on the display substrate; and
a touch sensing layer disposed on the display panel, and including a sensor electrode,
wherein the touch sensing layer is connected to the first connection electrode by a first touch line, and is connected to the second connection electrode by a second touch line, and
wherein at least one of the first touch line and the second touch line includes a resistance value increasing portion, and the resistance value increasing portion has a meander shape.
11. The display device of claim 10 , wherein the connection structure further includes:
a fifth connection electrode disposed in the same first layer; and
a sixth connection electrode connected to the fifth connection electrode on the fifth connection electrode.
12. The display device of claim 11 , further comprising:
a central processor connected to the circuit board, and
wherein the central processor is connected to the fifth connection electrode by a touch line.
13. The display device of claim 10 , wherein the accessing part is connected to the base substrate by a surface mount technology.
14. The display device of claim 10 , wherein the accessing part is connected to the base substrate by a solder.
15. The display device of claim 10 , wherein the accessing part is connected to the base substrate by a connector.
16. The display device of claim 10 , wherein the accessing part is connected to the base substrate by an anisotropic conductive film.