Transparent display device

1. A transparent display device, comprising:

a substrate provided thereon with a display area in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area;

a gate driver provided in the non-display area on the substrate, including a plurality of stages;

a metal line provided between the gate driver and the display area;

a trench provided between the metal line and the display area; and

a signal output line extending from the gate driver provided in the non-display area to the display area, wherein the signal output line is provided below the metal line in an area overlapping the trench.

2. The transparent display device of claim 1 , wherein the metal line is an output test line connected with the gate driver.

3. The transparent display device of claim 1 , further including a first insulating film provided over the metal line, wherein the trench passes through the first insulating film.

4. The transparent display device of claim 3 , further including a second insulating film provided over the first insulating film, wherein the trench passes through the second insulating film, and the second insulating film overlays at least one side of the first insulating film in the trench.

5. The transparent display device of claim 4 , further comprising anode electrodes respectively provided in the plurality of subpixels and a bank provided between the anode electrodes, wherein the second insulating film is formed of substantially the same material as that of the bank on the same layer as the bank.

6. The transparent display device of claim 4 , wherein the second insulating film is provided with ends formed between the gate driver and the trench.

7. The transparent display device of claim 4 , further comprising an encapsulation film on the second insulating film, filling the trench.

8. The transparent display device of claim 1 , wherein the signal output line includes a first layer provided between the gate driver and the trench, a second layer provided between the trench and the display area, and a contact hole electrically connecting the first layer with the second layer,

wherein the metal line is provided between the first layer and the second layer of the signal output line.

9. The transparent display device of claim 1 , wherein the display area includes first non-transmissive areas provided with the plurality of subpixels and a first transmissive area provided between the first non-transmissive areas, and the non-display area includes a second non-transmissive area provided with the plurality of stages and a second transmissive area provided among the plurality of stages, and

wherein the second transmissive area has substantially the same transmittance as that of the first transmissive area.

10. The transparent display device of claim 9 , wherein the non-display area further includes third non-transmissive areas provided with pixel power lines and common power lines for supplying power to the plurality of subpixels, and third transmissive areas provided between the third non-transmissive areas, and

wherein the third transmissive area has substantially the same transmittance as that of the first transmissive area.

11. The transparent display device of claim 1 , further comprising a dam provided between an end of the substrate and the gate driver.

12. The transparent display device of claim 11 , further comprising a lighting test line provided between the dam and the gate driver.

13. The transparent display device of claim 12 , wherein the lighting test line is configured for testing whether disconnection and defect exist in a plurality of signal lines formed on the substrate.

14. The transparent display device of claim 2 , wherein the output test line is configured for testing whether at least one of a gate signal or a light emission control signal is output from the gate driver.

15. A transparent display device, comprising:

a substrate provided thereon a display area in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area;

a plurality of metal lines provided in the non-display area over the substrate;

at least one insulating film provided over the plurality of metal lines and provided with an open area formed between one of the metal lines and the display area; and

a signal output line extending from a gate driver provided in the non-display area to the display area, wherein the signal output line is provided below the metal lines in an area overlapping the open area.

16. The transparent display device of claim 15 , further comprising an encapsulation layer provided over the at least one insulating film,

wherein the open area is covered and filled by the encapsulation layer.

17. The transparent display device of claim 15 , wherein the at least one insulating film includes a planarization film provided over the metal lines, and a bank provided over the planarization film, and

wherein the planarization film includes a first open area, and the bank includes a second open area having a width narrower than that of the first open area.

18. The transparent display device of claim 17 , wherein the bank is provided with ends formed between the metal lines.

19. The transparent display device of claim 15 , wherein the metal lines include at least one of an output test line connected with the gate driver provided in the non-display area, and a lighting test line connected with a lighting test transistor provided in the non-display area.