Liquid crystal display
View Patent ↗A liquid crystal display, including: a liquid crystal panel; and a visual inspection unit positioned in an outer region of the liquid crystal panel and transferring a test signal to the liquid crystal panel, in which the visual inspection unit includes: a test pad to which a test signal is applied; a first test line connected to the test pad; and a second test line connected to the test pad through a bridge line.
1. A liquid crystal display, comprising:
a display area including a plurality of pixels; and
a visual inspection unit positioned in an outer region of the display area and configured to output a test screen to the plurality of pixels,
wherein:
the visual inspection unit includes:
a first test line;
a second test line extending parallel to the first test line;
a test pad, to which a test signal is applied, disposed between the first test line and the second test line, directly connected to the first test line, and extending from the first test line in a direction toward the second test line;
an insulating layer on the test pad and the second test line; and
a bridge line on the insulating layer and overlapping the test pad and the second test line without overlapping the first test line;
the insulating layer includes a first connection hole overlapping the test pad and a second connection hole overlapping the second test line;
the bridge line is connected to the test pad through the first connection hole and connected to the second test line through the second connection hole; and
a common electrode voltage is applied to the test pad as the test signal.
2. The liquid crystal display of claim 1 , wherein:
the visual inspection unit further includes a plurality of test pads to which a plurality of test signals are applied and a plurality of test lines connected to respective ones of the plurality of test pads.
3. The liquid crystal display of claim 1 , wherein:
the first test line and the second test line transfer the same signal.
4. A liquid crystal display, comprising:
a display area including a plurality of pixels; and
a visual inspection unit positioned in an outer region of the display area and configured to output a test screen to the plurality of pixels,
wherein:
the visual inspection unit includes:
a first test line;
a second test line extending parallel to the first test line;
a test pad, to which a test signal is applied, disposed between the first test line and the second test line, directly connected to the second test line, and extending from the second test line in a direction toward the first test line;
an insulating layer on the test pad and the first test line; and
a bridge line on the insulating layer and overlapping the test pad and the first test line without overlapping the second test line;
the insulating layer includes a first connection hole overlapping the first test line and a second connection hole overlapping the test pad;
the bridge line is connected to the first test line through the first connection hole and connected to the test pad through the second connection hole; and
a storage electrode voltage is applied to the test pad as the test signal.
5. The liquid crystal display of claim 4 , wherein:
the storage electrode voltage applied to the test pad is transferred through the bridge line and the first test line to the plurality of pixels; and
the storage electrode voltage applied to the test pad is transferred through the second test line to the plurality of pixels.
6. The liquid crystal display of claim 1 , wherein:
the bridge line is made of indium tin oxide (ITO) or indium zinc oxide (IZO).
7. The liquid crystal display of claim 1 , wherein:
the common electrode voltage applied to the test pad is transferred through the first test line to the plurality of pixels; and
the common electrode voltage applied to the test pad is transferred through the bridge line and the second test line to the plurality of pixels.