Power consumption control apparatus in personal digital assistant (PDA) phone

BACKGROUND OF THE INVENTION

1. Field of the Invention

0001The present invention relates to a personal digital assistant (PDA) phone, and more particularly, to a power consumption control apparatus in a PDA phone.

2. Description of the Background Art

0002In general, a personal digital assistant (PDA) is a kind of hand-held (pocket-size) microcomputer. The PDA is typically used for arrangement schedule, memo writing and personal information management. In addition to the arrangement schedule, the PDA can be also used for the field of the mobile Internet or the like. In other words, the PDA can be considered as equipment in which various control functions and an Internet access function of a notebook computer are put together with a small size of electronic organizer.

0003Recently, as interest in PDAs increases, the number of users has grown larger. A PDA phone which has the cellular phone function in addition to various functions of the PDA has come into the market. Since the PDA phone converges the functions of the PDA and the phone function, it is necessary that operation methods for the PDA phone should be arranged according to various states.

0004As functions of user equipment driven by portable batteries such as smart phones and PDA phones become complicated and varied, and the performance of user equipment is enhanced, power consumption per unit of time is considerably increased. Accordingly, in order to reduce the power consumption of the user equipment, controlling the power for software and hardware becomes more important to design the user equipment. Hardware components such as a CPU, a memory device, an LCD and the like which constitute the user equipment cause this multifunction, high-performance user equipment to consume much power.

0005Particularly, a PDA phone in accordance with the conventional art comprises a sleep mode, an idle mode, a called mode, an in-call mode and a calling mode. A mode of the PDA phone in accordance with the conventional art can be transited only from the sleep mode to the idle mode. The mode of the PDA phone in accordance with the conventional art can be transited only from the idle mode to the sleep mode.

0006Hereinafter, a state transition of the conventional PDA phone will be described in detail with reference to Figure 1.

0007Figure 1 is a state transition diagram of a PDA phone in accordance with the conventional art.

0008As shown in Figure 1, when a user wakes up the PDA phone, a sleep mode 11 is transited to an idle mode 12 (S11). In a state of the idle mode 12, the idle mode 12 is transited to the sleep mode 11 automatically after a certain amount of time or by user's input signal (S12).

0009When a call signal is received in the state of the idle mode 12, the idle mode 12 is transited to a called mode (S13). If the call signal is not accepted in a state of the called mode 13, that is, if the user does not answer the phone, the called mode 13 is transited to the idle mode 12 (S14).

0010If the received call signal is accepted in the state of the called mode 13, that is, if the user answers the phone, the called mode 13 is transited to the in-call mode 14 (S15).

0011In addition, if the user presses a telephone number signal in order to make a phone call with the other party in the state of the idle mode 12, that is, sends a call signal, the idle mode 12 is transited to a calling mode 15 (S16). If the user cancels the sent call signal in a state of the calling mode 15, that is, if the user stops making a phone call, the calling mode 15 is transited to the idle mode 12 again (S17).

0012If the other party accepts the call signal in the state of the calling mode 15, that is, if the other party answers the phone, the calling mode 15 is transited to the in-call mode 14 (S18).

0013If the call signal is terminated in a state of the in-call mode 14, that is, If the user terminates the call, the in-call mode 14 is transited to the idle mode 12 (S19).

0014Here, the sleep mode 11 cannot be implemented by the user. In the sleep mode 11, a screen of the PDA phone is turned off, touch input and keypad input cannot be made and a state only for answering the phone is maintained. Accordingly, the PDA phone operates in the sleep mode 11 at the minimum power.

0015The idle mode 12 is a state that the power which is applied to a CPU, a cache and a buffer is cut off. In addition, the idle mode 12 is a mode that when an interrupt occurs, the sleep mode, the called mode, the in-call mode and the calling mode return. Here, in the idle mode 12, user's operation is all allowed, the screen of the PDA phone is turned on, and touch input and keypad input can be made. That is, the idle mode is a state only for the PDA purpose. Since the PDA phone operates in the idle mode 12 with a certain amount of power internally consumed, the PDA phone consumes more power in the idle mode than in the sleep mode 11

0016The called mode 13 is a state that the call signal sent by the other party is received and a telephone bell rings before the phone call is connected. Therefore, the PDA phone consumes more power in the called mode 13 than in sleep mode 11.

0017The in-call mode 14 is a state that voice communication with the other party is performed. Accordingly, the PDA phone consumes more power in the in-call mode 14 than in the sleep mode 11.

0018The calling mode 15 is a state that the user sends a call signal before the phone call is connected. Accordingly, the PDA phone consumes more power in the calling mode 15 than in the sleep mode 11.

0019However, since the PDA phone in accordance with the conventional art maintains the called mode, the in-call mode and the calling mode even in unnecessary steps, there is a problem that the PDA phone consumes much power. In addition, the conventional PDA phone is unable to cope with the circumstances which may occur in every state.

SUMMARY OF THE INVENTION

0020Therefore, an object of the present invention is to provide a power consumption control apparatus and a method thereof in a PDA phone in accordance with the present invention which can reduce power consumption of the PDA phone by transiting the PDA phone from a called mode, an in-called mode and a calling mode to a sleep mode, and cope with the circumstances which may occur in every state of the PDA phone.

0021To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a power consumption control method in a PDA phone which comprises: transiting the PDA phone from an idle mode to a sleep mode automatically after a certain amount of time or by user's input signal; transiting the PDA phone from a called mode to the sleep mode automatically after a certain amount of time or by user's input signal; transiting the PDA phone from a calling mode to the sleep mode automatically after a certain amount of time or by user's input signal; and transiting the PDA phone from an in-call mode to the sleep mode automatically after a certain amount of time or by user's input signal.

0022The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

0023The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

0024In the drawings: <ul id="ul0001" list-style="none" compact="compact"><li>Figure 1 is a state transition diagram of a PDA phone in accordance with the conventional art;</li><li>Figure 2 is a state transition diagram of a PDA phone in accordance with the present invention; and</li><li>Figure 3 is a table showing how much power the PDA phone consumes in each mode in accordance with the present invention.</li></ul>

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

0025Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

0026Hereinafter, the preferred embodiments of a power consumption control apparatus and a method thereof in a PDA phone in accordance with the present invention which can reduce power consumption of the PDA phone by transiting the PDA phone from a called mode, an in-call mode and a calling mode to a sleep mode, and cope with the circumstances which may occur in every state of the PDA phone.

0027Figure 2 is a state transition diagram of a PDA phone in accordance with the present invention.

0028Figure 3 is a table showing how much power the PDA phone consumes in each mode in accordance with the present invention.

0029As shown in Figure 2, the power consumption control apparatus in a PDA phone in accordance with the present invention can perform the steps of transiting the PDA phone from an idle mode to a sleep mode automatically after a certain amount of time or by user's input signal; transiting the PDA phone from a called mode to the sleep mode automatically after a certain amount of time or by user's input signal; transiting the PDA phone from a calling mode to the sleep mode automatically after a certain amount of time or by user's input signal; and transiting the PDA phone from an in-call mode to the sleep mode automatically after a certain amount of time or by user's input signal.

0030Hereinafter, a power consumption control method in a PDA phone in accordance with the present invention will be described in detail.

0031First, when the power is inputted to a PDA phone, a mode of the PDA phone becomes a sleep mode 21. Here, as shown in Figure 3, the PDA phone in the sleep mode has 21.2mW power consumption.

0032In a state of the sleep mode 21, if the user wakes up the PDA phone, the sleep mode 21 is transited to the idle mode 22 (S21). Here, the wake-up occurs by user's operation. For example, said user's operation can be done by pressing a specific button for a certain amount of time or more or by turning a switch on. Here, as shown in Figure 3, the PDA phone in the idle mode has 296-525.2mW power consumption.

0033In a state of the idle mode 22, the idle mode 22 is transited to the sleep mode 21 when the user supplies an input signal, or the idle mode 22 is automatically transited to the sleep mode 21 after a certain amount of time passes (S22).

0034In the state of the idle mode 22, the PDA phone receives a call signal, the idle mode 22 is transited to the called mode 23 (S23). The PDA phone consumes more power in the called mode 23 than in the sleep mode 21.

0035In the state of the sleep mode 21, when the PDA phone receives a call signal, the sleep mode 21 is transited to the called mode 23 (S24).

0036In a state of the called mode 23, if the call signal is no longer received because the user does not accept the received call signal, the called mode 23 is transited to the idle mode 22 (S25).

0037In the state of the called mode 23, the called mode 23 is transited to the sleep mode 21 when the user supplies an input signal, or the called mode 23 is automatically transited to the sleep mode 21 after a certain amount of time passes (S26). That is, while a bell is ringing as the PDA phone receives a call signal, the called mode 23 is transited to the sleep mode 21 if the bell rings for more than a time previously set by the user. Accordingly, since the PDA phone consumes more power in the called mode 23 than in the sleep mode 21, the power consumption of the PDA phone is reduced by transiting the PDA phone from the called mode 23 to the sleep mode 21. For example, as shown in Figure 3, the PDA phone in the called mode 23 has 296 to 525.2mW power consumption, and PDA phone in the sleep mode 21 transited from the called mode has 21.2mW power consumption.

0038In the state of the sleep mode 21 transited from the called mode 23, when the PDA phone receives the other party's call signal again, the sleep mode 21 is transited to the called mode 23 (S27). As a result, since the call signal is received according to a certain period, the mode of the PDA phone is alternately transited to the called mode 23 and the sleep mode 21 after the time previously set by the user. However, that the screen of the PDA phone is turned on and off is invisible to the naked eye because the certain period is very short. Thus, the screen of the PDA phone seems to be continuously turned on.

0039In the state of the called mode 23 or in the state of the sleep mode 21 transited from the called mode 23, if the user accepts the received call signal, the call mode 23 or the sleep mode 21 transited from the called mode 23 is transited to the in-call mode 24 (S28 and S29).

0040In the state of the idle mode 22, when the PDA phone sends a call signal, the idle mode 22 is transited to the calling mode 25 (S30). That is, if the user makes a phone call with the other party, the mode of the PDA phone becomes the calling mode 25. The PDA phone consumes much power in the calling mode 25 than in the sleep mode 21.

0041In a state of the calling mode 25, when the PDA phone cancels sending of the call signal, that is, when the user stops making a phone call, the calling mode 25 is transited to the idle mode 22 (S31).

0042In the state of the calling mode 25, the calling mode 25 is transited to the sleep mode 21 when the user supplies an input signal, or the calling mode 25 is automatically transited to the sleep mode 21 after a certain amount of time passes (S32). Accordingly, since the PDA phone consumes more power in the calling mode 25 than in the sleep mode 21 transited from the calling mode, the power consumption of the PDA phone is reduced by transiting the PDA phone from the calling mode 25 to the sleep mode 21. Here, as shown in Figure 3, the PDA phone in the calling mode 25 has 296 to 525.2 mW power consumption, and the PDA phone in the sleep mode 21 transited from the calling mode 25 has 21.2 mW power consumption.

0043In the state of the sleep mode 21 transited from the calling mode 25, when the user forcibly wakes up the PDA phone, the sleep mode 21 transited from the calling mode 25 is transited to the calling mode 25 (S33).

0044In the state of the calling mode 25 or in the state of the sleep mode 21 transited from the calling mode 25, if the user accepts the sent call signal, the calling mode 25 or the sleep mode 21 transited from the calling mode 25 is transited to the in-call mode 24 (S34 and S35).

0045In a state of the in-call mode 24, the in-call mode 24 is transited to the sleep mode 21 when the user supplies an input signal, or the in-call mode 24 is automatically transited to the sleep mode 21 after a certain amount of time passes (S36). That is, if the user presses a button for transiting the mode of the PDA phone to the sleep mode 21 or if talk time with other party exceeds a certain amount of time, the mode of the PDA phone becomes the sleep mode 21. Accordingly, since the PDA phone consumes more power in the in-call mode 24 than in the sleep mode 21 transited from the in-call mode, the power consumption of the PDA phone is reduced by transiting the PDA phone from the in-call mode 24 to the sleep mode 21. Here, as shown in Figure 3, the PDA phone in the in-call mode 24 has 1389 to 2049.8 mW power consumption, and the PDA phone in the sleep mode 21 transited from the in-call mode 24 has 1334.7 to 1926.0 mW power consumption.

0046In the sleep mode 21 transited from the in-call mode 24, if the user wakes up the PDA phone, the sleep mode 21 transited from the in-call mode 24 is transited to the in-call mode 24 (S37).

0047In the state of the in-call mode 24 or in the state of the sleep mode 21 transited from in-call mode 24, when the phone call is terminated, the in-call mode 24 or the sleep mode 21 transited from the in-call mode 24 is transited to the idle mode 22 (S38 and S39).

0048As so far described in detail, a power consumption control apparatus and a method thereof in a PDA phone in accordance with the present invention can reduce the power consumption of the PDA phone by transiting the PDA phone from a called mode, an in-called mode and a calling mode to a sleep mode, and cope with the circumstances which may occur in every state of the PDA phone.

0049As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.