Display panel, assembling method thereof and liquid crystal display

1. A display panel, comprising:

a first substrate, comprising a common potential line and at least one testing line separated from the common potential line;

a second substrate, disposed above the first substrate; and

a spacer, disposed between the first substrate and the second substrate, wherein the spacer comprises at least one conducting particle therein and the common potential line is electrically connected to the testing line via the conducting particle.

2. The display panel according to claim 1 , wherein the first substrate further comprises a plurality of conducting pads for electrically connecting the testing line and the common potential line individually, and the conducting pads are electrically connected to each other via the conducting particle.

3. The display panel according to claim 2 , wherein the conducting pads are made of indium tin oxide (ITO) or indium zinc oxide (IZO).

4. The display panel according to claim 1 , further comprising a liquid crystal layer, wherein the spacer seals the liquid crystal layer between the first substrate and the second substrate.

5. The display panel according to claim 1 , wherein the spacer further comprises a gel for fixing the conducting particle.

6. The display panel according to claim 1 , wherein the second substrate further comprises a common electrode electrically connected to the common potential line via the conducting particle.

7. A liquid crystal display (LCD), comprising:

a backlight module; and

a display panel, disposed on the backlight module, wherein the display panel comprises:

a first substrate, comprising a common potential line and at least one testing line separated from the common potential line;

a second substrate, disposed above the first substrate;

a liquid crystal layer, disposed between the first substrate and the second substrate; and

a spacer, disposed between the first substrate and the second substrate, wherein the spacer comprises at least one conducting particle therein and the common potential line is electrically connected to the testing line via the conducting particle.

8. The LCD according to claim 7 , wherein the first substrate further comprises a plurality of conducting pads for electrically connecting the testing line and the common potential line individually, and the conducting pads are electrically connected to each other via the conducting particle.

9. The LCD according to claim 8 , wherein the conducting pads are made of indium tin oxide (ITO) or indium zinc oxide (IZO).

10. The LCD according to claim 7 , wherein the spacer seals the liquid crystal layer between the first substrate and the second substrate.

11. The LCD according to claim 7 , wherein the spacer further comprises a gel for fixing the conducting particle.

12. The LCD according to claim 7 , wherein the second substrate further comprises a common electrode electrically connected to the common potential line via the conducting particle.

13. The LCD according to claim 7 , further comprises a common voltage source for providing a common signal to the common potential line, wherein the common signal transmits from the common potential line to the testing line via the conducting particle.

14. An assembling method of a display panel, comprising:

providing a first main substrate and a second main substrate, wherein the first main substrate is adapted to be cut into a plurality of first substrates, the second main substrate is adapted to be cut into a plurality of second substrates, the first substrates respectively correspond to the second substrates, and each of the first substrates comprises a common potential line and at least one testing line which are electrically isolated to each other;

forming a plurality of spacers on the first main substrate or the second main substrate, wherein the spacers are correspondingly formed on each of the first substrates or each of the second substrates, and each of the spacers comprises at least one conducting particle therein;

bonding the first main substrate to the second main substrate, such that the spacers are disposed between the first main substrate and the second main substrate, and the conducting particles electrically connect the common potential line to the testing line after bonding the first main substrate to the second main substrate; and

cutting the first main substrate and the second main substrate respectively into the first substrates and the second substrates wherein each of the first substrates constitutes the display panel with the corresponding second substrate.

15. The assembling method of a display panel according to claim 14 , further comprising filling liquid crystal between the first substrates and the second substrates.

16. The assembling method of a display panel according to claim 15 , wherein after the liquid crystal is filled between the first substrates and the second substrates, the first main substrate is bonded to the second main substrate.

17. The assembling method of a display panel according to claim 15 , wherein after the first main substrate is bonded to the second main substrate, the liquid crystal is filled between the first substrates and the second substrates.

18. The assembling method of a display panel according to claim 14 , wherein before the common potential line is electrically connected to the testing line on each of the first substrates correspondingly, the method further comprises performing a test on the first substrates by the testing lines.