Electrooptic device, driving IC, and electronic apparatus
View Patent ↗A liquid crystal device comprises a pair of substrates 2 a and 2 b , liquid crystal L held between the substrates 2 a and 2 b , and an IC 13 mounted on an overhang section 2 c of the substrate 2 a . A terminal column 26 a comprises a plurality of terminals 18 aligned in a direction away from the liquid crystal L. The terminal column 26 a has, in the order of the closeness to the liquid crystal L, a first noneffective terminal region within a distance “A” from a first side of the IC, an effective terminal region X continuing from the first noneffective terminal region, and a second noneffective terminal region within a distance “B” from a second side of the IC, the second noneffective terminal region continuing from the effective terminal region. The distances A and B are adjusted to satisfy the relationship A>B.
1. An electrooptic device comprising an electrooptic material, a substrate for supporting the electrooptic material, and an IC chip mounted on the substrate,
the IC chip comprising:
a first terminal column comprising a plurality of terminals arranged in a direction away from the electrooptic material; and
a second terminal column disposed along a first side of the IC chip close to the electrooptic material, the second terminal column comprising a plurality of terminals arranged in parallel to the electrooptical material;
the first terminal column comprising a first noneffective terminal region having at least two consecutive noneffective terminals within a distance “A” from the first side of the IC chip, and an effective terminal region continuing from the first noneffective terminal region,
the second terminal column comprising a second noneffective terminal region having at least two consecutive noneffective terminals within a distance “C” from a second side of the IC chip and an effective terminal region continuing from the third second noneffective terminal region, wherein
A>C; and
the second noneffective terminal region adjoins the first noneffective terminal region and extends in a direction substantially perpendicular to a direction in which the first noneffective terminal region extends.
2. The electrooptic device according to claim 1 , wherein the electrooptic material is liquid crystal, and the IC chip is mounted on at least one of a pair of substrates which hold the liquid crystal therebetween.
3. The electrooptic device according to claim 1 , wherein each noneffective terminal section comprises a dummy terminal which has the same structure as that formed in the effective terminal region and does not contribute to carrying electric current.
4. An electronic apparatus comprising an electrooptic device according to claim 1 , a casing for accommodating the electrooptic device, and controlling means for controlling the operation of the electrooptic device.
5. A driving IC comprising a rectangular active face, a first terminal column comprising a plurality of terminals arranged along a short side of the rectangular active face, and a second terminal column comprising a plurality of terminals arranged along a long side of the rectangular active face,
the first terminal column comprising a first noneffective terminal region having at least two consecutive noneffective terminals within a distance “A” from the long side of the rectangular active face, and an effective terminal region continuing from the first noneffective terminal region,
the second terminal column comprising a second noneffective terminal region having at least two consecutive noneffective terminals within a distance “C” from the short side of the rectangular active face, and an effective terminal region continuing from the second noneffective terminal region,
wherein
A>C; and
the second noneffective terminal region adjoins the first noneffective terminal region and extends in a direction substantially perpendicular to a direction in which the first noneffective terminal region extends.
6. The driving IC according to claim 5 , wherein each noneffective terminal region comprises a dummy terminal that has the same shape as that in the effective terminal region and does not carry electric current.