Electrical device
View Patent ↗In one embodiment, an electrical device includes a first substrate with a first side and a second side, a second substrate opposed to the first side of the first substrate, and a functional element between the first side of the first substrate and the second substrate. A first electrode arranged to a first substrate side of the functional element and overlaps with the functional element in planar view. A second electrode is arranged to a second substrate side of the functional element and overlaps with the functional element in planar view. An electronic component is arranged between the functional element and the first electrode, overlaps with the first electrode and the second electrode in planar view, and drives the functional element. A connecting section electrically connects the first electrode to the second electrode and a protection circuit between an output terminal of the electronic circuit and the first electrode.
1. An electrical device comprising:
a first substrate having a first side and a second side, the first side being opposed to the second side;
a second substrate opposed to the first side of the first substrate;
a functional element arranged between the first side of the first substrate and the second substrate;
a first electrode arranged to a first substrate side of the functional element, the first electrode overlapping with the functional element in a planar view;
a second electrode arranged to a second substrate side of the functional element, the second electrode overlapping with the functional element in the planar view;
an electronic circuit arranged between the functional element and the first electrode, the electronic circuit overlapping with the first electrode and the second electrode in the planar view, the electronic circuit driving the functional element;
a connecting section electrically connecting the first electrode to the second electrode; and
a protection circuit coupled between an output terminal of the electronic circuit and the first electrode.
2. The electrical device according to claim 1 , further comprising:
a first wiring arranged between the first electrode and the functional element, a first potential being applied to the first wiring;
wherein the protection circuit comprises a first electrostatic protection circuit coupled between the output terminal and the first wiring.
3. The electrical device according to claim 2 , further comprising:
a second wiring arranged between the first electrode and the functional element;
a second potential, which is different from the first potential, being applied to the second wiring,
wherein the protection circuit comprises a second electrostatic protection circuit coupled between the output terminal and the second wiring.
4. The electrical device according to claim 3 , wherein the protection circuit comprises a third electrostatic protection circuit coupled between the first electrode and the first wiring.
5. The electrical device according to claim 4 , wherein the protection circuit comprises a fourth electrostatic protection circuit coupled between the first electrode and the second wiring.
6. The electrical device according to claim 1 , further comprising:
a first wiring arranged between the first electrode and the functional element, a first potential being applied to the first wiring,
wherein the protection circuit comprises a third electrostatic protection circuit coupled between the first electrode and the first wiring.
7. The electrical device according to claim 6 , further comprising:
a second wiring arranged between the first electrode and the functional element, a second potential, which is different from the first potential, being applied to the second wiring,
wherein the protection circuit comprises a fourth electrostatic protection circuit coupled between the first electrode and the second wiring.
8. The electrical device according to claim 1 , wherein at least a part of the output terminal is overlapping with the first electrode in the planar view.
9. The electrical device according to claim 1 , wherein the output terminal and the first electrode are arranged in a same layer.
10. The electrical device according to claim 1 , wherein a part of the second substrate and a part of the second electrode are arranged at a second side of the first substrate.
11. The electrical device according to claim 10 , wherein the first electrode is a part of the second electrode.
12. The electrical device according to claim 1 , further comprising:
a third substrate opposed to the second side of the first substrate,
the first electrode arranged to a third side of the third substrate, and
the third substrate opposed to the second substrate.
13. The electrical device according to claim 1 , wherein the protection circuit is embedded in the first substrate.
14. The electrical device according to claim 1 , wherein:
the first substrate comprises a first base material and a second base material, and
the protection circuit is arranged between the first base material and the second base material.
15. The electrical device according to claim 1 , wherein the first substrate comprises base materials which have a flexibility.
16. The electrical device according to claim 1 , further comprising:
a third electrode arranged between the functional element and the second side of the first substrate,
wherein the functional element is an electro-optical element, and an optical state of the electro-optical element depends on a voltage between the second electrode and the third electrode.