Liquid crystal display having a driver contact structure for preventing corrosion of conductive films
View Patent ↗A display panel including first to third conductive films is provided, which includes: a first signal line including a first portion that includes the first conductive film, an intermediate portion that includes at least two of the first to the third conductive films (“intermediate portion films”), and a contact portion that contacts an output terminal of a driving circuit and includes the intermediate portion films except for at least one of the intermediate portion films; a second signal line intersecting the first signal line and including the second conductive film; a switching element connected to the first and the second signal lines; and a pixel electrode connected to the switching element and including the third conductive film.
1. A display panel comprising:
a substrate;
a gate line including a first conductive film;
an auxiliary data line formed on the substrate and including the first conductive film;
a data line intersecting the gate line and including a second conductive film, wherein the data line includes an expanded end portion including a contact portion contacting an input terminal of a driving circuit;
a switching element connected to the gate line and the data line;
a pixel electrode connected to the switching element and including a third conductive film;
a first insulating layer formed between the first conductive film and the second conductive film and comprising a first contact hole exposing the auxiliary data line; and
a first contact assistant including the third conductive film and disposed on the first contact hole,
wherein the data line contacts the auxiliary data line through the first contact hole, and
wherein the auxiliary data line is not expanded to overlap the contact portion.
2. The display panel of claim 1 , further comprising an inspection line disposed near the end portion of the data line.
3. The display panel of claim 2 , wherein the inspection line comprises the first and the second conductive films.
4. The display panel of claim 3 , wherein the first insulating layer further comprises a second contact hole exposing the first conductive film of the inspection line, and
the first conductive film of the inspection line contacts the second conductive film of the inspection line through the second contact hole.
5. The display panel of claim 4 , further comprising a second contact assistant including the third conductive film and disposed on the second contact hole,
wherein the first contact assistant contacts data lines and the second assistant contacts the second film of the inspection line.
6. The display panel of claim 5 , wherein the first conductive film comprises Al or Al alloy and the second conductive film comprises Cr, Mo, or Mo alloy.
7. The display panel of claim 6 , wherein the third conductive film comprises a transparent conductor or a reflective conductor.
8. The display panel of claim 7 , wherein the switching element comprises a polysilicon film connected to the data line.