Power control device for GPS receiver and method of controlling power thereof

• US 20080012759A1
• Filed: 07/11/2007
• Published: 01/17/2008
• Est. Priority Date: 07/12/2006
• Status: Abandoned Application

• Current Assignee: Behavior Tech Computer Corporation
• Original Assignee: Behavior Tech Computer Corporation
• Inventors: Te-Yi, Chang
• Application Number:
  US11/822,920
• Publication Number:
  US 20080012759A1
• Time in Patent Office: Days
• US Class Current: 342/357.06
• CPC Class Codes: G01S 19/34 Power consumption

Abstract

A power control device for selectively outputting power to a GPS receiver includes a position sensor and a power control module. The power control module determines whether to output power to the GPS receiver according to the variation quantity of the position information after receiving the position information. Therefore, as long as the GPS receiver remains still, the GPS receiver can be turned off since there is no need to receive the position information.

Claims

1. A power control device for selectively outputting power to a GPS receiver, comprising:

a position sensor for generating a position information; and

a power control module coupled with the position sensor for selectively outputting the power to the GPS receiver according to a variation quantity of the position information.

2. The power control device according to claim 1, wherein the position information comprises an azimuth.

3. The power control device according to claim 2, wherein the power control module outputs an “

OFF”

signal so as to turn off the GPS receiver as the variation quantity of the azimuth is smaller than a first predetermined quantity for more than a first predetermined period of time.

4. The power control device according to claim 2, wherein the power control module outputs an “

ON”

signal so as to turn on the GPS receiver as the variation quantity of the azimuth is larger than a second predetermined quantity.

5. The power control device according to claim 2, wherein the power control module outputs an “

ON”

signal so as to turn on the GPS receiver as the variation quantity of the azimuth is larger than a second predetermined quantity for more than a second predetermined period of time.

6. The power control device according to claim 1, wherein the power control module comprises a microcontroller for selectively outputting the power to the GPS receiver according to the variation quantity of the position information.

7. A power control method for a GPS receiver, comprising the steps of:

providing a position sensor and a power control module;

generating a position information corresponding to the GPS receiver by the position sensor and transmitting the position information to the power control module; and

selectively outputting the power to the GPS receiver according to a variation quantity of the position information during a predetermined period of time.

8. The power control method according to claim 7, wherein the position information comprises an azimuth.

9. The power control method according to claim 8, wherein the power control module outputs an “

OFF”

signal so as to turn off the GPS receiver as the variation quantity of the azimuth is smaller than a first predetermined quantity for more than a first predetermined period of time.

10. The power control method according to claim 8, wherein the power control module outputs an “

ON”

signal so as to turn on the GPS receiver as the variation quantity of the azimuth is larger than a second predetermined quantity.

11. The power control method according to claim 8, wherein the power control module outputs an “

ON”

signal so as to turn on the GPS receiver as the variation quantity of the azimuth is larger than a second predetermined quantity for more than a second predetermined period of time.

12. The power control method according to claim 7, wherein the power control module comprises a microcontroller to selectively output power to the GPS receiver according to the variation quantity of the position information.