# Patent

## Title
Handheld device and power saving control method thereof

## Abstract

A handheld device and a power saving method are provided. The handheld device comprises a transceiver and a processor electrically connected to the transceiver. The processor executes a sync procedure every a sync period to enable the transceiver to establish an internet connection with a mail server to receive a mail data, determine that the handheld device works in an idle mode, and automatically adjust the sync period by extending the sync period gradually.

## Background
CROSS-REFERENCES TO RELATED APPLICATIONS
This application claims the benefit of priority based on U.S. Provisional Application Ser. No. 61/602,343 filed on Feb. 23, 2012, the entire content of which is also incorporated herein by reference.


BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a handheld device and a power saving control method thereof More particularly, the handheld device of the present invention automatically adjusts the sync period for executing a sync procedure with a mail server when the handheld device works in an idle mode.
2. Descriptions of the Related Art
With rapid advancement of the wireless communication technologies, people's demands for information are also increasing. There are more and more kinds of handheld devices being produced for meeting people's demands and being used nearly everywhere in people's daily life. For example, people use a mobile phone, a personal digital assistant (PDA), or a tablet computer to receive the mails from the mail server through the Internet.
Conventionally, when the handheld device works in the idle mode (i.e. when the handheld device is not operated by a user for a while), the handheld device still executes a sync procedure with a mail server every a sync period (e.g. 5 minutes) to automatically receive mails from the mail server. During the idle mode, the new incoming mails would not be read by the user until the user operates the handheld device. Therefore, the sync procedure will cause unnecessary power consumption if the sync procedure is executed too often during the idle mode.
Accordingly, an urgent need exists in the art to provide an automatic mechanism that can adjust the sync period of executing the sync procedure during the idle mode so as to achieve the purpose of power saving.
SUMMARY OF THE INVENTION
The primary objective of this invention is to provide an automatic mechanism that can adjust the sync period of executing the sync procedure during the idle mode so as to reduce the unnecessary power consumption.
To achieve the aforesaid objective, the present invention discloses a handheld device, which comprises a transceiver and a processor electrically connected to the transceiver. The processor is configured to execute a sync procedure every a sync period to enable the transceiver to establish an internet connection with a mail server to receive a mail data, determine that the handheld device works in an idle mode, and automatically adjust the sync period by extending the sync period gradually.
In addition, the present invention further discloses a power saving control method for use in a handheld device comprising a transceiver and a processor electrically connected to the transceiver. The power saving control method being executed by the processor and comprising the following steps of: (a) executing a sync procedure every a sync period to enable the transceiver to establish an internet connection with a mail server to receive a mail data; (b) determining that the handheld device works in an idle mode; (c) automatically adjusting the sync period by extending the sync period gradually
The detailed technology and preferred embodiments implemented for the subject invention are described in the following paragraphs accompanying the appended drawings for people skilled in this field to well appreciate the features of the claimed invention.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view of a network structure 1 according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a handheld device 11 according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a handheld device 11 according to a second embodiment of the present invention; and
FIG. 4 is a flowchart diagram of a power saving control method according to a third embodiment of the present invention.



DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention mainly relates to a handheld device and a power saving control method thereof It shall be appreciated that, description of the following embodiments is only for purpose of illustration rather than to limit the scope of the present invention. Moreover, in the following embodiments and the attached drawings, elements unrelated to the present invention are omitted from depiction; and dimensional relationships among individual elements in the attached drawings are illustrated only for ease of understanding but not to limit the actual scale.
FIGS. 1 and 2 depict a network structure 1 and a handheld device 11 in the network structure 1 according to a first embodiment of the present invention respectively. The network structure 1 comprises the handheld device 11, an Internet 13 and a mail server 15. The handheld device 11 may be a mobile phone, a personal digital assistant (PDA) or a tablet computer. The Internet 13 comprises telecommunications networks, computer networks etc. to provide a route for the handheld device 11 to establish an internet connection with the mail server 15.
As shown in FIG. 2, the handheld device 11 comprises a transceiver 11a and a processor 15. The processor 15 is electrically connected to the transceiver 11a and executes a sync procedure with the mail server 15. Specifically, the processor 15 runs an operating system and executes a mail application of the operating system in the background. The user can operate the handheld device 11 to select a sync option (e.g. “Push mail,” “Manual” or “Smart Sync”) on the operating system.
When the user selects the “Push mail” sync option, the processor 11b enables the transceiver 11a to establish an internet connection 12, keep the internet connection 12 and receive the mail data (e.g. the new incoming mail) from the mail server 15 in real time. When the user selects the “Manual” sync option, the processor 11b executes a sync procedure every a sync period to enable the transceiver 11a to establish the internet connection 12 with the mail server 15 to receive the mail data. The user can further select the sync period, e.g. 5 minutes, 10 minutes, 15 minutes, 30 minutes, 1 hour and so on by manual. The “Push mail” and “Manual” sync options are readily known by those of ordinary skill in the art, and thus will not be further described herein.
The “Smart Sync” sync option is the main content of the present invention for achieving the purpose of power saving. It should be noticed that the phrase “Smart Sync” is only for purpose of description rather than limit the present invention to any specific phrase. The operations of “Smart Sync” are performed when the user selects the “Smart Sync” sync option or the processor 11b determines that the handheld device 11 works in an idle mode and then automatically changes the sync option from “Push mail” to “Smart Sync”.
Based on the “Smart Sync” sync option, the processor 11b executes the sync procedure every the sync period to enable the transceiver 11a to establish the internet connection 12 with the mail server 15 to receive the mail data. Afterwards, the processor 11b determines that the handheld device 11 works in the idle mode, and automatically adjusts the sync period by extending the sync period gradually. In detail, the processor 11b continuously determines whether the handheld device 11 still works in the idle mode whenever executing the sync procedure. If the handheld device 11 still works in the idle mode, the processor 11b extends the sync period to make the next sync period longer than the present sync period.
For example, the processor 11b may set the sync period to 15 minutes in the beginning and doubles the sync period every time the processor 15b execute the sync procedure until the sync period is extended to 4 hours. In addition, the processor 11b may adjust the sync period by extending the sync period gradually in a plurality of stages (e.g. five stages) in which the next stage may not be the double of the previous stage, but must be longer than the previous stage.
Besides, the processor 15b may further observe the user's habit of operating the mail application of the operating system on the handheld device 11, e.g. the user may not launch the mail application often a day to check the new coming mails. Therefore, according to the execution of the mail application (i.e. the frequency of launching the mail application), the processor 15b could decide a minimum sync period (e.g. 1 hour), and sets the sync period to the minimum sync period in the beginning.
FIG. 3 depicts a handheld device 11 according to a second embodiment of the present invention. As compared to the technical contents described in the first embodiment, the handheld device 11 in the second embodiment further comprises an input module 11c electrically connected to the processor 11b. The input module 11c may be a touch panel or a keyboard.
In the second embodiment, the processor 15b adjusts the sync period by extending the sync period gradually in a plurality of stages and the sync period of each of the stages is customized by the user. Specifically, the user may operate the input module 13c to set the sync period of each of the stages. In response to the user's operation of the input module 13c, the input module 13c generates a user input signal 102. Then, the processor 13b receives the user input signal 102 and sets the sync period of each of the stages according to the user input signal 102.
A third embodiment of the present invention is as shown in FIG. 4, which is a flowchart diagram of a power saving control method. The power saving control method of this embodiment can be used in a handheld device (e.g., the handheld device 11 of the first and second embodiments). The handheld device comprises a transceiver and a processor electrically connected to the transceiver. The power saving control method of the present invention is executed by the processor.
Firstly, step S401 is executed to execute a sync procedure every a sync period to enable the transceiver to establish an internet connection with a mail server to receive a mail data. Then, Step S403 is executed to determine that the handheld device works in an idle mode. Finally, step S405 is executed to automatically adjust the sync period by extending the sync period gradually.
In addition to the aforesaid steps, the power saving control method of this embodiment can also execute all the operations set forth in the first and second embodiments and accomplish all the corresponding functions. How the power saving control method of this embodiment executes these operations and accomplishes these functions can be readily appreciated by those of ordinary skill in the art based on the explanation of the first and second embodiments, and thus will not be further described herein.
According to the above descriptions, the handheld device and the power saving control method of the present invention could effectively reduce the unnecessary power consumption of the handheld device by automatically adjusting the sync period for executing a sync procedure with a mail server when the handheld device works in an idle mode. Therefore, the present invention provide an automatic mechanism that can adjust the sync period of executing the sync procedure during the idle mode to achieve the purpose of power saving.
The above disclosure is related to the detailed technical contents and inventive features thereof People skilled in this field may proceed with a variety of modifications and replacements based on the disclosures and suggestions of the invention as described without departing from the characteristics thereof Nevertheless, although such modifications and replacements are not fully disclosed in the above descriptions, they have substantially been covered in the following claims as appended.

## Claims

1. A handheld device comprising:
a transceiver; and
a processor, electrically connected to the transceiver, being configured to determine whether the handheld device works in an idle mode, automatically change a sync option from a push mail option to a smart sync option when the processor determines that the handheld device works in the idle mode, and perform the following operations of the smart sync option:
execute a sync procedure every a sync period to enable the transceiver to establish an internet connection with a mail server to receive a mail data;
continuously determine whether the handheld device still works in idle mode every time the sync procedure is executed; and
automatically adjust the sync period by extending the sync period after the sync procedure is executed as long as the processor determines that the handheld device still works in the idle mode;
wherein the handheld device working in the idle mode indicates that the handheld device is not operated by a user for a predetermined period.

2. The handheld device as claimed in claim 1, wherein the processor adjusts the sync period by extending the sync period in a plurality of stages.

3. The handheld device as claimed in claim 2, further comprising an input module electrically connected to the processor, wherein the input module generates a user input signal and the processor receives the user input signal from the input module and sets the sync period of each of the stages according to the user input signal.

4. The handheld device as claimed in claim 3, wherein the input module is one of a touch panel and a keyboard.

5. The handheld device as claimed in claim 1, wherein the processor sets the sync period to 15 minutes in the beginning and doubles the sync period every time the processor execute the sync procedure until the sync period is extended to 4 hours.

6. The handheld device as claimed in claim 1, wherein the processor further decides a minimum sync period according to an execution of a mail application on the handheld device, and sets the sync period to the minimum sync period in the beginning.

7. A power saving control method for use in a handheld device, the handheld device comprising a transceiver and a processor electrically connected to the transceiver, the power saving control method being executed by the processor and comprising the following steps of:
determining whether the handheld device works in an idle mode;
automatically changing a sync option from a push mail option to a smart sync option when the processor determines that the handheld device works in the idle mode; and
performing the following operations of the smart sync option:
(a) executing a sync procedure every a sync period to enable the transceiver to establish an internet connection with a mail server to receive a mail data;
(b) continuously determining whether the handheld device still works in the idle mode every time the sync procedure is executed; and
(c) automatically adjusting the sync period by extending the sync period after the sync procedure is executed as long as the processor determines that the handheld device still works in the idle mode:,

wherein the handheld device working in the idle mode indicates that the handheld device is not operated by a user for a predetermined period.

8. The power saving control method as claimed in claim 7, wherein the step (c) is adjusting the sync period by extending the sync period in a plurality of stages.

9. The power saving control method as claimed in claim 8, wherein handheld device further comprise an input module electrically connected to the processor, the input module generates a user input signal, and the power saving control method further comprises the following steps:
receiving the user input signal from the input module; and setting the sync period of each of the stages according to the input signal.

10. The power saving control method as claimed in claim 9, wherein the input module is one of a touch panel and a keyboard.

11. The power saving control method as claimed in claim 7, wherein the step (c) is setting the sync period to 15 minutes in the beginning and doubling the sync period every time executing the sync procedure until the sync period is extended to 4 hours.

12. The power saving control method as claimed in claim 7, further comprising the following steps:
deciding a minimum sync period according to an execution of a mail application on the handheld device; and
setting the sync period to the minimum sync period in the beginning.