Liquid crystal display device, manufacturing method for liquid crystal display device and electric device
View Patent ↗A liquid crystal display device according to a present disclosure comprises: a thin film transistor substrate including a thin film transistor array; a counter substrate opposed to the thin film transistor substrate; and a liquid crystal layer disposed between the thin film transistor substrate and the counter substrate, wherein the thin film transistor substrate includes: an overlapping part that overlaps with the counter substrate in planar view; and a non-overlapping part that includes a terminal portion and does not overlap with the counter substrate in planar view, and an outer shape of the non-overlapping part has a non-rectangular shape in planar view.
1. A method for manufacturing a liquid crystal display device including a thin film transistor substrate including a thin film transistor array and a counter substrate opposed to the thin film transistor substrate, the thin film transistor substrate including an overlapping part that overlaps with the counter substrate in planar view and a non-overlapping part that includes a terminal portion and does not overlap with the counter substrate in planar view, the liquid crystal display device manufacturing method comprising:
a first substrate preparing step of preparing a first substrate including the thin film transistor substrate;
a second substrate preparing step of preparing a second substrate including the counter substrate;
a first seal member forming step of forming an annular first seal member surrounding an outer periphery of the terminal portion in planar view between the first substrate and the second substrate;
a second seal member forming step of forming an annular second seal member disposed along an outer edge of the overlapping part in planar view between the first substrate and the second substrate;
an etching step of separating an entire region including a region where the first seal member is formed and a region where the second seal member is formed in planar view from the first substrate and the second substrate by performing wet etching of an outer edge of the entire region;
a division step of dividing the first substrate and the second substrate along a part of an outer edge of the non-overlapping part after the etching step; and
a terminal exposure step of separating the counter substrate from the second substrate by cutting the second substrate along a boundary between the overlapping part and the non-overlapping part after the division step.
2. The method for manufacturing a liquid crystal display device according to claim 1 , wherein in the division step, the outer edge of the non-overlapping part is disposed on an inner peripheral side of the first seal member, and a part of the first seal member is removed from the entire region.
3. The method for manufacturing a liquid crystal display device according to claim 2 , wherein a part of each of the first seal member and the second seal member is formed along a first side that is a boundary between the overlapping part and the non-overlapping part.
4. The method for manufacturing a liquid crystal display device according to claim 3 , wherein the first seal member and the second seal member are integrated along the first side.
5. The method for manufacturing a liquid crystal display device according to claim 3 , wherein
the non-overlapping part has a substantially trapezoidal shape, and
the division step includes:
a step of cutting the first substrate in a second side that constitutes the outer edge of the non-overlapping part and is opposed to the first side and a first leg and a second leg that connect the first side and the second side and constitute the outer edge of the non-overlapping part; and
a step of cutting the second substrate so as to overlap with the first side, the second side, the first leg, and the second leg in planar view.
6. The method for manufacturing a liquid crystal display device according to claim 5 , wherein
in the step of cutting the first substrate and the step of cutting the second substrate,
the second side is disposed on the inner peripheral side of the first seal member in planar view, and
the first leg and the second leg intersect the first seal member in planar view.
7. The method for manufacturing a liquid crystal display device according to claim 1 , further comprising a laser beam irradiation step of irradiating the first substrate and the second substrate with a laser beam so as to overlap with the outer edge of the entire region in planar view before the etching step.
8. The method for manufacturing a liquid crystal display device according to claim 7 , wherein
the counter substrate includes a third side that overlaps with a first side that is a boundary between the overlapping part and the non-overlapping part in planar view, a fourth side opposed to the third side, and a fifth side intersecting the fourth side, and
the first substrate and the second substrate are irradiated with the laser beam such that the fifth side is curved outward in planar view in the laser beam irradiation step.
9. The method for manufacturing a liquid crystal display device according to claim 1 , further comprising a curvature step of curving the overlapping part when viewed from a side-surface direction.
10. The method for manufacturing a liquid crystal display device according to claim 9 , wherein an average curvature in the non-overlapping part is smaller than a minimum curvature in the overlapping part when viewed from the side-surface direction in the curvature step.