Electronic device
An electronic device includes: a first housing and a second housing provided to be capable of being displaced between a first state in which the first major surfaces thereof face each other and a second state in which the second major surfaces thereof face each other; a magnetic detection part provided in the first housing; a magnet provided in the second housing; and a control part configured to determine the first state and the second state based on an output of the magnetic detection part. The magnet is disposed such that a magnetization direction thereof is orthogonal to the first major surface and the second major surface of the second housing, and the magnetic detection part includes a first magnetic sensor and a second magnetic sensor arranged along a direction normal to the first major surface and the second major surface of the first housing.
1. An electronic device, comprising:
a first housing and a second housing provided to be capable of being displaced between a first state in which first major surfaces thereof face each other and a second state in which second major surfaces thereof face each other;
a magnetic detection part provided in the first housing;
a magnet provided in the second housing; and
a control part configured to determine the first state and the second state based on an output of the magnetic detection part,
wherein the magnetic detection part includes a first magnetic sensor and a second magnetic sensor, and
wherein the first magnetic sensor, the second magnetic sensor, and the magnet overlap with each other as viewed in a direction orthogonal to the first major surface and the second major surface of the first housing.
2. The device of claim 1 , wherein the control part is configured to determine the first state and the second state by comparing outputs of the first magnetic sensor and the second magnetic sensor.
3. The device of claim 1 , wherein the first magnetic sensor and the second magnetic sensor are integrated in a single magnetic sensor IC.
4. The device of claim 3 , wherein the magnetic sensor IC is mounted on a mounting surface of a printed circuit board.
5. The device of claim 4 , wherein the first magnetic sensor and the second magnetic sensor are disposed between the magnet and the printed circuit board in the first state, and
wherein the printed circuit board is disposed between the first magnetic sensor and the second magnetic sensor, and the magnet in the second state.
6. The device of claim 1 , wherein the first magnetic sensor is integrated in a first magnetic sensor IC and the second magnetic sensor is integrated in a second magnetic sensor IC, and
wherein the first magnetic sensor IC is mounted on a first mounting surface of a printed circuit board and the second magnetic sensor IC is mounted on a second mounting surface of the printed circuit board.
7. The device of claim 6 , wherein the first magnetic sensor is disposed between the magnet and the printed circuit board in the first state, and
wherein the second magnetic sensor is disposed between the magnet and the printed circuit board in the second state.
8. The device of claim 1 , wherein the magnetic detection part further includes a third magnetic sensor and a fourth magnetic sensor arranged along the direction orthogonal to the first major surface and the second major surface of the first housing, and
wherein the third magnetic sensor is disposed on the same plane as the first magnetic sensor and the fourth magnetic sensor is disposed on the same plane as the second magnetic sensor.
9. The device of claim 8 , wherein the control part is configured to determine the first state and the second state by determining whether a differential output between the first magnetic sensor and the fourth magnetic sensor or a differential output between the second magnetic sensor and the third magnetic sensor, whichever has a larger absolute value, is positive or negative.
10. The device of claim 8 , wherein the first magnetic sensor, the second magnetic sensor, the third magnetic sensor, and the fourth magnetic sensor are integrated in a single magnetic sensor IC.
11. The device of claim 8 , wherein the first magnetic sensor and the second magnetic sensor are integrated in a first magnetic sensor IC and the third magnetic sensor and the fourth magnetic sensor are integrated in a second magnetic sensor IC, and
wherein the first magnetic sensor IC and the second magnetic sensor IC are mounted on the same mounting surface of a printed circuit board.
12. The device of claim 11 , wherein the first magnetic sensor and the second magnetic sensor are disposed adjacent to one end of the mounting surface of the printed circuit board, and
wherein the third magnetic sensor and the fourth magnetic sensor are disposed adjacent to the other end of the mounting surface of the printed circuit board.
13. The device of claim 8 , wherein the third magnetic sensor, the fourth magnetic sensor, and the magnet overlap with each other as viewed in the direction orthogonal to the first major surface and the second major surface of the first housing.
14. The device of claim 8 , wherein the third magnetic sensor and the fourth magnetic sensor are disposed between the magnet and a printed circuit board in the first state, and
wherein the printed circuit board is disposed between the third magnetic sensor and the fourth magnetic sensor, and the magnet in the second state.
15. The device of claim 1 , further comprising:
a display part provided on the first major surface of the first housing; and
an operation part provided on the first major surface of the second housing,
wherein the control part is configured to put the electronic device in a pause state when the first state is determined and to put the operation part in an invalid state when the second state is determined.
16. The device of claim 1 , wherein the first housing and the second housing are detachably attached to each other.
17. The device of claim 1 , wherein each of the first magnetic sensor and the second magnetic sensor is arranged to detect a magnetic field applied perpendicularly to the first major surface and the second major surface of the first housing.
18. The device of claim 1 , wherein the magnet is disposed such that a magnetization direction thereof is orthogonal to the first major surface and the second major surface of the second housing.
19. The device of claim 1 , wherein the first magnetic sensor and the second magnetic sensor are arranged such that a detection direction thereof is orthogonal to the first major surface and the second major surface of the first housing.
20. The device of claim 1 , wherein the magnet includes a first surface and a second surface, and
wherein the first surface and the second surface are parallel to the first major surface and the second major surface of the second housing.
21. The device of claim 1 , wherein a virtual line connecting the first magnetic sensor and the second magnetic sensor is orthogonal to the first major surface and the second major surface of the first housing.