# US 7,746,201 B2 · Portable electronic device with hall sensor

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- Number: US 7,746,201 B2
- Document ID: US7746201B2
- Status: Granted
- Kind: B2
- Application number: 11/964,800
- Filed: 2007-12-27
- Published: 2009-03-05
- Granted: 2010-06-29
- Earliest claimed: 2007-08-29
- Assignees: Chi Mei Communications Systems, Inc.
- Inventors: Po-Hua Huang
- Web page: https://patentgrep.com/patent/US7746201B2

## CPC

- H04M 1/0245: {using open/close detection}
- H04W 52/0254: {detecting a user operation or a tactile contact or a motion of the device}
- H04M 1/0214: {Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position (combined with translation movement H04M1/0235)}
- Y02D 30/70: in wireless communication networks
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A portable electronic device includes a cover section (54), a body section (52), a magnet (60) and a hall sensor (70). The cover section has a printed circuit board secured therein. The body section has a connecting portion, and the body section is rotatably connected to the cover section with the connecting portion. The magnet is secured in the connecting portion, and the hall sensor is electrically attached to the printed circuit board. The magnet acts on the hall sensor according to relative rotation between the cover section and the body section, thereby switching the portable electronic device to a work mode when the cover section is opened away from the body section or a power save mode when the cover section is closed to the body section.

## Claims

### Claim 1

A portable electronic device, comprising:
a cover section having a printed circuit board secured therein and a knuckle, the knuckle defining a cavity at one side thereof and forming a shaft portion at an opposite side thereof;
a body section having two connecting portions rotatably connected to the knuckle of the cover section;
a magnet secured in one of the connecting portions, the shaft portion abutting the magnet, and
a hall sensor electrically attached to the printed circuit board,
wherein the magnet acts on the hall sensor according to relative rotation between the cover section and the body section, thereby switching the portable electronic device to a work mode when the cover section is opened away from the body section or a power save mode when the cover is closed to the body section.

### Claim 2 (depends on 1)

The portable electronic device as claimed in claim 1, wherein the magnet includes an S pole and an N pole, and the S pole is opposite to the hall sensor when the cover section is rotated to cover the body section.

### Claim 3 (depends on 2)

The portable electronic device as claimed in claim 2, wherein the S pole is located to be symmetrical to the N pole.

### Claim 4 (depends on 1)

The portable electronic device as claimed in claim 1, wherein the magnet has a six polygonal wall, the connecting portion for receiving the magnet defines a six polygonal hole, and the magnet is received in the polygonal hole.

### Claim 5 (depends on 4)

The portable electronic device as claimed in claim 4, wherein the connecting portion for receiving the magnet defines a receiving hole, and the receiving hole communicates with the six polygonal hole.

### Claim 6 (depends on 1)

The portable electronic device as claimed in claim 1, further comprising a hinge assembly, wherein the hinge assembly is received in the cavity and includes a main shaft, one end of the main shaft is exposed from the cavity and is received in the other connecting portion.