Abstract:
A mobile device is configured to control power consumption. The mobile device includes a detector configured to detect at least one of an active input or a passive condition, where the passive condition is based on a comparison of a device state or a change in the device state to a threshold. The mobile device includes a controller configured to respond to the detected active input or passive condition by causing less than all components in the mobile device, including the display screen of the mobile device, to enter a sleep mode directly from within an in-call mode. An amount of power supplied to the display screen is reduced in the sleep mode. The operational modes of the mobile device include the sleep mode and the in-call mode, and the mobile device is configured to consume at least 4% less power in the sleep mode than in the in-call mode.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of U.S. application Ser. No. 12/821,684, filed Jun. 23, 2010, now allowed, which is a is a continuation of U.S. application Ser. No. 12/758,704, filed Apr. 12, 2010, now abandoned, which is a continuation of U.S. application Ser. No. 11/055,226, filed Feb. 9, 2005, now U.S. Pat. No. 7,725,139, which claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2004-0018114, filed on Mar. 17, 2004, the contents of which are hereby incorporated by reference herein in their entirety. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The present invention relates to a personal digital assistant (PDA) phone, and more particularly, to a power consumption control apparatus in a PDA phone. 
         [0004]    2. Description of the Background Art 
         [0005]    In 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. 
         [0006]    Recently, 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. 
         [0007]    As 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. 
         [0008]    Particularly, 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 transitioned only from the sleep mode to the idle mode. The mode of the PDA phone in accordance with the conventional art can be transitioned only from the idle mode to the sleep mode. 
         [0009]    Hereinafter, a state transition of the conventional PDA phone will be described in detail with reference to  FIG. 1 . 
         [0010]      FIG. 1  is a state transition diagram of a PDA phone in accordance with the conventional art. 
         [0011]    As shown in  FIG. 1 , when a user wakes up the PDA phone, a sleep mode  11  is transitioned to an idle mode  12  (S 11 ), In a state of the idle mode  12 , the idle mode  12  is transitioned to the sleep mode  11  automatically after a certain amount of time of by user&#39;s input signal (S 12 ). 
         [0012]    When a call signal is received in the state of the idle mode  12 , the idle mode  12  is transitioned to a called mode (S 13 ). 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 transitioned to the idle mode  12  (S 14 ). 
         [0013]    If 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 transitioned to the in-call mode  14  (S 15 ). 
         [0014]    In 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 transitioned to a calling mode  15  (S 16 ). 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 transitioned to the idle mode  12  again (S 17 ). 
         [0015]    If 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 transitioned to the in-call mode  14  (S 18 ). 
         [0016]    If 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 transitioned to the idle mode  12  (S 19 ). 
         [0017]    Here, 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. 
         [0018]    The 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&#39;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 . 
         [0019]    The 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 . 
         [0020]    The 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 . 
         [0021]    The 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 . 
         [0022]    However, 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 
       [0023]    Therefore, 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. 
         [0024]    To 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&#39;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&#39;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&#39;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&#39;s input signal 
         [0025]    The 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 
         [0026]    The 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. 
           [0027]    In the drawings: 
           [0028]      FIG. 1  is a state transition diagram of a PDA phone in accordance with the conventional art; 
           [0029]      FIG. 2  is a state transition diagram of a PDA phone in accordance with the present invention; and 
           [0030]      FIG. 3  is a table showing how much power the PDA phone consumes in each mode in accordance with the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0031]    Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. 
         [0032]    Hereinafter, 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 transitioning 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. 
         [0033]      FIG. 2  is a state transition diagram of a PDA phone in accordance with the present invention. 
         [0034]      FIG. 3  is a table showing how much power the PDA phone consumes in each mode in accordance with the present invention. 
         [0035]    As shown in  FIG. 2 , the power consumption control apparatus in a PDA phone in accordance with the present invention can perform the steps of transitioning the FDA phone from an idle mode to a sleep mode automatically after a certain amount of time or by user&#39;s input signal; transitioning the PDA phone from a called mode to the sleep mode automatically after a certain amount of time or by user&#39;s input signal; transitioning the FDA phone from a calling mode to the sleep mode automatically after a certain amount of time or by user&#39;s input signal; and transitioning the PDA phone from an in-call mode to the sleep mode automatically after a certain amount of time or by user&#39;s input signal. 
         [0036]    Hereinafter, a power consumption control method in a PDA phone in accordance with the present invention will be described in detail. 
         [0037]    First, when the power is inputted to a PDA phone, a mode of the PDA phone becomes a sleep mode  21 . Here, as shown in  FIG. 3 , the PDA phone in the sleep mode has 21.2 mW power consumption. 
         [0038]    In a state of the sleep mode  21 , if the user wakes up the PDA phone, the sleep mode  21  is transitioned to the idle mode  22  (S 21 ). Here, the wake-up occurs by user&#39;s operation. For example, said user&#39;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  FIG. 3 , the PDA phone in the idle mode has 296˜525.2 mW power consumption. 
         [0039]    In a state of the idle mode  22 , the idle mode  22  is transitioned to the sleep mode  21  when the user supplies an input signal, or the idle mode  22  is automatically transitioned to the sleep mode  21  after a certain amount of time passes (S 22 ). 
         [0040]    In the state of the idle mode  22 , the PDA phone receives a call signal, the idle mode  22  is transitioned to the called mode  23  (S 23 ). The PDA phone consumes more power in the called mode  23  than in the sleep mode  21 . 
         [0041]    In the state of the sleep mode  21 , when the PDA phone receives a call signal, the sleep mode  21  is transitioned to the called mode  23  (S 24 ). 
         [0042]    In 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 transitioned to the idle mode  22  (S 25 ). 
         [0043]    In the state of the called mode  23 , the called mode  23  is transitioned to the sleep mode  21  when the user supplies an input signal, or the called mode  23  is automatically transitioned to the sleep mode  21  after a certain amount of time passes (S 26 ). That is, while a bell is ringing as the PDA phone receives a call signal, the called mode  23  is transitioned to the sleep mode  21  if the belt 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 transitioning the PDA phone from the called mode  23  to the sleep mode  21 . For example, as shown in  FIG. 3 , the PDA phone in the called mode  23  has 296 to 525.2 mW power consumption, and PDA phone in the sleep mode  21  transitioned from the called mode has 21.2 mW power consumption. 
         [0044]    In the state of the sleep mode  21  transitioned from the called mode  23 , when the PDA phone receives the other party&#39;s call signal again, the sleep mode  21  is transitioned to the called mode  23  (S 27 ). As a result, since the call signal is received according to a certain period, the mode of the PDA phone is alternately transitioned 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. 
         [0045]    In the state of the called mode  23  or in the state of the sleep mode  21  transitioned from the called mode  23 , if the user accepts the received call signal, the call mode  23  or the sleep mode  21  transitioned from the called mode  23  is transitioned to the in-call mode  24  (S 28  and S 29 ). 
         [0046]    In the state of the idle mode  22 , when the PDA phone sends a call signal, the idle mode  22  is transitioned to the calling mode  25  (S 30 ). 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 . 
         [0047]    In 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 transitioned to the idle mode  22  (S 31 ). 
         [0048]    In the state of the calling mode  25 , the calling mode  25  is transitioned to the sleep mode  21  when the user supplies an input signal, or the calling mode  25  is automatically transitioned to the sleep mode  21  after a certain amount of time passes (S 32 ). Accordingly, since the PDA phone consumes more power in the calling mode  25  than in the sleep mode  21  transitioned from the calling mode, the power consumption of the PDA phone is reduced by transitioning the PDA phone from the calling mode  25  to the sleep mode  21 . Here, as shown in  FIG. 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  transitioned from the calling mode  25  has 21.2 mW power consumption. 
         [0049]    In the state of the sleep mode  21  transitioned from the calling mode  25 , when the user forcibly wakes up the PDA phone, the sleep mode  21  transitioned from the calling mode  25  is transitioned to the calling mode  25  ( 633 ). 
         [0050]    In the state of the calling mode  25  or in the state of the sleep mode  21  transitioned from the calling mode  25 , if the user accepts the sent call signal, the calling mode  25  or the sleep mode  21  transitioned from the calling mode  25  is transitioned to the in-call mode  24  ( 634  and  635 ). 
         [0051]    In a state of the in-call mode  24 , the in-call mode  24  is transitioned to the sleep mode  21  when the user supplies an input signal, or the in-call mode  24  is automatically transitioned to the sleep mode  21  after a certain amount of time passes (S 36 ). That is, if the user presses a button for transitioning 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  transitioned from the in-call mode, the power consumption of the PDA phone is reduced by transitioning the PDA phone from the in-call mode  24  to the sleep mode  21 . Here, as shown in  FIG. 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  transitioned from the in-call mode  24  has 1334.7 to 1926.0 mW power consumption. 
         [0052]    In the sleep mode  21  transitioned from the in-call mode  24 , if the user wakes up the PDA phone, the sleep mode  21  transitioned from the in-call mode  24  is transitioned to the in-call mode  24  (S 37 ). 
         [0053]    In the state of the in-call mode  24  or in the state of the sleep mode  21  transitioned from in-call mode  24 , when the phone call is terminated, the in-call mode  24  or the sleep mode  21  transitioned from the in-call mode  24  is transitioned to the idle mode  22  (S 38  and S 39 ). 
         [0054]    As 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 transitioning 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. 
         [0055]    As 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.