Electronic device

Patent metadata

Field	Value
Publication number	US-9552073-B2
Application number	US-201514712026-A
Country	US
Kind code	B2
Filing date	May 14, 2015
Priority date	Dec 5, 2013
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

There is provided an electronic device including a plurality of sensing devices and a host. The sensing devices are connected in parallel or series. A part of the sensing devices and the host may remain in a power saving mode or a standby mode in operation so as to reduce the power consumption.

First claim

What is claimed is:

1. An electronic device comprising:
a first sensing device configured to output a first signal when detecting a first event;
a second sensing device coupled to the first sensing device, and the second sensing device configured to detect a second event when receiving the first signal and output a second signal when detecting the second event;
a third sensing device configured to output a third signal when detecting a third event;
a fourth sensing device coupled to both the third sensing device and the first sensing device, and the fourth sensing device configured to detect a fourth event when receiving the third signal and output a fourth signal to the first sensing device when detecting the fourth event to allow the first sensing device to detect the first event; and
a host coupled to the second sensing device but not coupled to the first sensing device, and the host configured to receive the second signal and verify a user identity according to the second signal.

2. The electronic device as claimed in claim 1 , wherein the second sensing device is configured to remain in a power saving mode before receiving the first signal.

3. The electronic device as claimed in claim 1 , wherein the host is configured to remain in a power saving mode before receiving the second signal.

4. The electronic device as claimed in claim 1 , wherein the first sensing device is a fingerprint detection device, the second sensing device is a pupil detection device, the third sensing device is a proximity sensing device and the fourth sensing device is a gesture detection device.

5. The electronic device as claimed in claim 1 , wherein the host, the first sensing device, the second sensing device, the third sensing device and the fourth sensing device are coupled to one another in a wired or wireless manner.

6. The electronic device as claimed in claim 1 , wherein the fourth sensing device is configured to remain in a power saving mode before receiving the third signal.

7. The electronic device as claimed in claim 1 , wherein in a period during which the third sensing device is detecting a sensing event, the first, second and fourth sensing devices and the host remain in a power saving mode.

8. The electronic device as claimed in claim 1 , wherein each of the first, second, third and fourth sensing devices comprises an image sensor an a light emitting element.

9. The electronic device as claimed in claim 8 , wherein the light emitting element is configured to emit infrared light or visible light.

Assignees

• Pixart Imaging Inc

Inventors

• Liu Chia-Yi
• Kuo Shih-Wei
• Chen Chun-Wei
• Chen Nien-Tse

Classifications

• H04N23/651

  for reducing power consumption by affecting camera operations, e.g. sleep mode, hibernation mode or power off of selective parts of the camera · CPC title

• H04N23/45

  for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images · CPC title

• G06F3/017 Primary

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• H04N5/2258

  Electricity · mapped topic

• G06K9/00355

  Physics · mapped topic