Display substrate and method of manufacturing a motherboard for the same
View Patent ↗A display substrate includes a signal line, a test switch, a test pad, and a first electrostatic dispersion line. The signal line is formed in the display area of a base substrate. The test switch is formed in a peripheral area of the base substrate surrounding the display area. The test switch applies a test signal to the signal line. The test pad is electrically connected to the test switch and receives the test signal. The first electrostatic dispersion line is extended from the test pad to an end of the base substrate.
1. A display substrate comprising:
a signal line formed in a display area of a base substrate;
a test switch formed in a peripheral area of the base substrate, wherein the peripheral area surrounds the display area, and the test switch applies a test signal to the signal line;
a test pad electrically connected to the test switch, wherein the test pad receives the test signal;
a first electrostatic dispersion line extended from the test pad to an edge of the base substrate;
a test signal line connected to the test switch to apply the test signal to the test switch, wherein the test signal line is extended from the test pad;
an organic layer formed in the display area and the peripheral area to cover the signal line and the test switch; and
a common voltage line formed on the organic layer and formed in the peripheral area of the base substrate, wherein the common voltage line transmits a common voltage signal to the display area, and wherein the test pad is directly connected to the test switch by the test signal line.
2. The display substrate of claim 1 , wherein the test pad comprises:
a test electrode connected to the test signal line; and
a test pad electrode electrically connected to the test electrode.
3. The display substrate of claim 2 , wherein the first electrostatic dispersion line is formed of substantially the same metal layer as the test pad electrode and connected to the test pad electrode.
4. The display substrate of claim 1 , further comprising:
a driving signal line electrically connected to the test switch to apply a driving signal to the test switch;
a driving pad connected to the driving signal line to receive the driving signal; and
a second electrostatic dispersion line extended from the driving pad to the edge of the base substrate.
5. The display substrate of claim 4 , wherein the driving pad comprises:
a driving electrode connected to the driving signal line; and
a driving pad electrode electrically connected to the driving electrode.
6. The display substrate of claim 5 , wherein the second electrostatic dispersion line is formed of substantially the same metal layer as the driving pad electrode to connect the driving pad electrode.
7. The display substrate of claim 6 , wherein the second electrostatic dispersion line is formed of substantially the same metal layer as the first electrostatic dispersion line and spaced apart from the first electrostatic dispersion line.
8. The display substrate of claim 1 , further comprising:
a voltage pad connected to the common voltage line; and
a third electrostatic dispersion line connected to the voltage pad, wherein the third electrostatic dispersion line is formed on the organic layer and extended to reach the edge of the base substrate.
9. The display substrate of claim 8 , wherein the voltage pad comprises:
a voltage electrode electrically connected to the common voltage line; and
a voltage pad electrode including a transparent material, wherein the voltage pad electrode is formed on the voltage electrode and connected to the third electrostatic dispersion line.
10. The display substrate of claim 1 , further comprising an organic layer formed in the display area and the peripheral area to cover the signal line and the test switch.
11. The display substrate of claim 10 , wherein the first electrostatic dispersion line is formed on the organic layer corresponding to the peripheral area.
12. A display substrate comprising:
a test electrode disposed in a peripheral area of a base substrate, wherein the peripheral area surrounds a display area;
a test signal line connected to the test electrode;
an electrostatic dispersion line electrically connected to the test electrode in the peripheral area of the base substrate;
an organic layer formed in the display area and the peripheral area to cover the signal line and the test switch; and
a common voltage line formed on the organic layer and formed in the peripheral area of the base substrate,
wherein the common voltage line transmits a common voltage signal to the display area, wherein the electrostatic dispersion line is extended from the test electrode to an edge of the base substrate, wherein the electrostatic dispersion line includes a different layer from the test electrode, wherein the test signal line is connected to a test switch to apply a test signal to the test switch, and wherein the test electrode is directly connected to the test switch by the test signal line.
13. The display substrate of claim 12 , wherein the test signal line and the electrostatic dispersion line are extended in different directions.
14. The display substrate of claim 12 , further comprising a test pad electrode electrically connected to the test electrode, wherein the test pad electrode overlaps the test electrode.
15. The display substrate of claim 14 , wherein the test pad electrode includes a transparent material.
16. The display substrate of claim 14 , wherein the electrostatic dispersion line is connected to the test pad electrode.
17. The display substrate of claim 15 , wherein the test pad electrode includes substantially the same layer as the electrostatic dispersion line.
18. The display substrate of claim 12 , wherein the test signal line is extended from the test electrode.
19. The display substrate of claim 12 , wherein the electrostatic dispersion line includes a transparent material.