Using magnets to detect a state of a cover

Patent metadata

Field	Value
Publication number	US-10024689-B2
Application number	US-201514857544-A
Country	US
Kind code	B2
Filing date	Sep 17, 2015
Priority date	Sep 17, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

This application relates to devices that utilize magnets and associated magnetic sensors. A magnetic sensor can be positioned and oriented with respect to a magnetic element such that the magnetic sensor is capable of detecting a horizontal magnetic field component in contrast to the conventional paradigm of detecting a vertical magnetic field component. This can be accomplished by orienting a magnetically sensitive surface of the magnetic sensor about ninety degrees with respect to a magnetic vector of the magnetic element.

First claim

What is claimed is:

1. An electronic device, comprising:
a housing having an external surface; and
a magnetic sensor capable of detecting a magnetic field from a magnetic element in accordance with a magnetic sensor detection axis, the magnetic sensor carried by the housing generally perpendicular to the external surface such that the magnetic sensor detection axis is generally parallel to the external surface, and based upon the detecting, provides a signal that is used to identify that the external surface is between the magnetic sensor and the magnetic element.

2. The electronic device as recited in claim 1 , wherein the external surface is a first surface and the housing further comprising a second surface that is generally parallel to the first surface.

3. The electronic device as recited in claim 2 , wherein the housing further carries a processor capable of communication with the magnetic sensor and that uses the signal to alter an operation of an electronic component carried by the housing.

4. The electronic device as recited in claim 2 , wherein when the signal is a first signal, the first surface is between the magnetic element and the magnetic sensor, otherwise, the signal is a second signal and the second surface is between the magnetic element and the magnetic sensor.

5. The electronic device as recited in claim 1 , wherein the magnetic sensor is mounted to a printed circuit board carried by the housing.

6. The electronic device as recited in claim 1 , wherein the magnetic field comprises a vertical component and a horizontal component that is generally parallel to the magnetic detection axis and perpendicular to the vertical component.

7. The electronic device as recited in claim 6 , wherein the horizontal component is generally detectable by the magnetic sensor when the vertical component is perpendicular to the external surface and the magnetic element is laterally displaced from the magnetic sensor.

8. The electronic device as recited in claim 6 , wherein the signal is based upon a direction of the horizontal component detected by the magnetic sensor.

9. The electronic device as recited in claim 1 , wherein the magnetic sensor is a dual output Hall Effect sensor.

10. A method operable by an electronic device having a housing with a first surface that is generally parallel to a second surface, comprising:
detecting a magnetic field provided by a magnetic element by a magnetic sensor in accordance with a magnetic sensor detection axis, the magnetic sensor being carried by the housing such that (i) the magnetic element is laterally displaced from the magnetic sensor, and (ii) the magnetic sensor detection axis is generally parallel to the first and second surfaces and perpendicular to an orientation of the magnetic element; and
providing, by the magnetic sensor in response to the detecting, a signal comprising:
a first detection signal that identifies that the first surface is between the magnetic sensor and the magnetic element, otherwise, a second detection signal that identifies that the second surface is between the magnetic sensor and the magnetic element.

11. The method as recited in claim 10 , wherein the electronic device operates in accordance with the signal.

12. The method as recited in claim 10 , wherein the magnetic sensor is capable of tracking movement of the magnetic element between the first and second surfaces.

13. The method as recited in claim 10 , wherein when the magnetic element is laterally polarized, the magnetic sensor is carried by the housing such that the magnetic sensor detection axis is perpendicular to the first and the second surfaces.

14. The method as recited in claim 10 , wherein the magnetic element is carried by a flap pivotally attached to the electronic device such that the flap is capable of positioning the magnetic element at the first surface in a first configuration and the second surface in a second configuration.

15. The method as recited in claim 14 , further comprising:
in accordance with detection by the magnetic sensor,
operating the electronic device in a first configuration mode in accordance with the magnetic element being positioned by the flap at the first surface; and
operating the electronic device in a second configuration mode in accordance with the magnetic element being positioned by the flap at the second surface.

16. A consumer product system, comprising:
an electronic device comprising a housing arranged to carry operational components and having a front portion and a rear portion opposite the front portion, the operational components comprising:
a magnetic sensor mounted perpendicular to the front and rear portions and operable to detect a magnetic field provided by a magnetic element, the magnetic element being generally detectable when a current location of the magnetic element is laterally disposed from the magnetic sensor and corresponds to a position (i) on or near the front portion, or (ii) on or near the rear portion; and
a flap that is capable of being removably attached to the electronic device in a manner that allows the flap to pivotally move with respect to the housing.

17. The consumer product system as recited in claim 16 , in a first configuration, the flap covers at least some of the front portion of the housing and in a second configuration, the flap covers at least some of the rear portion of the housing.

18. The consumer product system as recited in claim 17 , wherein the flap carries the magnetic element such that in the first configuration the magnetic element is located at a first position that allows detection of the magnetic element by the magnetic sensor and in the second configuration the magnetic element is located at a second position that allows detection of the magnetic element by the magnetic sensor.

19. The consumer product system as recited in claim 18 , wherein the magnetic sensor provides information corresponding to a current configuration of the flap based upon the detection of the magnetic element at the first or the second position.

20. The consumer product system as recited in claim 16 , wherein the magnetic sensor detects the magnetic field in accordance with a magnetic sensor detection axis that is generally parallel to the front and rear portions when the magnetic sensor is mounted perpendicular to the front and rear portions.

Assignees

• Apple Inc

Inventors

• Zhu Hao
• Difonzo John C
• Zhang Guangtao
• Johari Rizal
• Smith Samuel Gilkison
• Corbin Sean S
• Uttermann Erik A

Classifications

• G01D5/145 Primary

  influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06) · CPC title

• G06F2200/1633

  Protecting arrangement for the entire housing of the computer · CPC title

• G06F1/1626

  with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs] · CPC title

• G06F1/1677

  for detecting open or closed state or particular intermediate positions assumed by movable parts of the enclosure, e.g. detection of display lid position with respect to main body in a laptop, detection of opening of the cover of battery compartment · CPC title