Abstract:
A control apparatus controls a supply of power to a second apparatus that operates independently of a first apparatus, and includes a notifying part to make a notification that notifies a need to control the power supplied to the second apparatus if needed, based on a preset timer time and a present time acquired from a Real Time Clock (RTC) within the first apparatus, and a supplying part to supply information related to a time for controlling the power supplied to the second apparatus, based on the notification from the notifying part, wherein the notifying part and the supplying part are operable with a power that makes only limited functions within the first apparatus operable.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application filed under 35 U.S.C. 111(a) claiming the benefit under 35 U.S.C. 120 and 365(c) of a PCT International Application No. PCT/JP2005/002035 filed Feb. 10, 2005, in the Japanese Patent Office, the disclosure of which is hereby incorporated by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to control apparatuses, information processing apparatuses and computer-readable storage media, and more particularly to a power control apparatus that uses a Real Time Clock (RTC), an information processing apparatus that realizes a timer function using the RTC, and a computer-readable storage medium that stores a program for causing a computer to realize such a timer function. 
     2. Description of the Related Art 
     Recently, some information processing apparatuses such as Personal Computers (PCs) have the so-called Instant TeleVision (ITV) function that is realized by hardware. Such an information processing apparatus has a tuner unit that receives and selects a broadcast signal, and a television (TV) tuner that converts the broadcast signal selected by the tuner unit into a TV video signal. The TV video signal and a video signal of the information processing apparatus obtained by recording and reproducing the TV video signal are switched and output to a monitor. In the general information processing apparatus having a built-in TV tuner, the TV tuner is started after the information processing apparatus is started, and for this reason, it takes time for the TV video signal to be output from the time when the information processing apparatus is started. A TV tuner that can quickly output the TV video signal to the monitor even when the information processing apparatus is not started, has been proposed in a Japanese Laid-Open Patent Application No. 2003-67073, for example. This proposed TV tuner quickly outputs the TV video signal by switching a switch between a case where the TV video signal is output directly to the monitor and a case where the TV video signal is recorded or reproduced and output via the PC. 
     By using the ITV function, it is possible to receive the television broadcast by the information processing apparatus, and to display the received program in the entire region or in a portion of the entire region of a display part of the information processing apparatus. The information processing apparatus is provided with one or more speakers in most cases, and the audio of the received program can also be reproduced by the information processing apparatus. 
     On the other hand, some television apparatuses are provided with a timer function. The timer function is useful in that it is possible to set the time when the power of the television apparatus is to be turned ON or OFF. For this reason, there are demands to also provide the timer function in the information processing apparatus having the ITV function that is realized by hardware. 
     However, in the conventional information processing apparatus having the ITV function that is realized by hardware, no timer or clock is provided in the ITV function. Accordingly, in order to provide the timer function in the ITV function, it is necessary to separately provide a timer or clock exclusively for the ITV function, and increases in the hardware and the cost are inevitable. 
     In the case of the ITV function that is realized by software, it is possible to realize the timer function by software. In this case, when the power of the information processing apparatus is turned OFF, for example, it is not possible to run any software because the CPU does not operate. But in an environment where it is possible to run the software, it is possible to realize both the ITV function and the timer function. The timer function that is realized by software, however, does not operate when the CPU does not operate, such as when the power of the information processing apparatus is turned OFF, and for this reason, the timer function that is realized by software cannot be utilized for the ITV function that is realized by hardware. 
     The applicant is aware of the prior art proposed in Japanese Laid-Open Patent Applications No. 2003-37799 and No. 10-83287. The Japanese Laid-Open Patent Application No. 2003-37799 proposes an information processing apparatus having an ITV function that includes a remote controlled reserve function. The Japanese Laid-Open Patent Application No. 10-83287 proposes an information processing apparatus having a plurality of switches corresponding to added application functions, wherein a routine for realizing an added application function is loaded without loading an Operating System (OS) routine when at least one of the switches is ON. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is a general object of the present invention to provide a novel and useful control apparatus, information processing apparatus and computer-readable storage medium, in which the problems described above are suppressed. 
     Another and more specific object of the present invention is to provide a control apparatus, an information processing apparatus and a computer-readable storage medium, which can provide a timer function in an ITV function that is realized by hardware, without having to separately provide a timer or clock exclusively for the ITV function and without increasing the hardware and the cost. 
     Still another object of the present invention is to provide a control apparatus for controlling a supply of power to a second apparatus that operates independently of a first apparatus, comprising a notifying part configured to make a notification that notifies a need to control the power supplied to the second apparatus if needed, based on a preset timer time and a present time acquired from a Real Time Clock (RTC) within the first apparatus; and a supplying part configured to supply information related to a time for controlling the power supplied to the second apparatus, based on the notification from the notifying part, wherein the notifying part and the supplying part are operable with a power that makes only limited functions within the first apparatus operable. According to the control apparatus of the present invention, it is possible to provide a timer function in an ITV function that is realized by hardware, without having to separately provide a timer or clock exclusively for the ITV function and without increasing the hardware and the cost. 
     A further object of the present invention is to provide an information processing apparatus forming a first apparatus having a built-in Real Time Clock (RTC), comprising a notifying part configured to make a notification that notifies a need to control the power supplied to a second apparatus if needed, based on a preset timer time and a present time acquired from a Real Time Clock (RTC) within the first apparatus; and a supplying part configured to supply information related to a time for controlling the power supplied to the second apparatus, based on the notification from the notifying part, wherein the notifying part and the supplying part are operable with a power that makes only limited functions within the first apparatus operable, and the first apparatus operates with a power supply different from that of the second apparatus. According to the information processing apparatus of the present invention, it is possible to provide a timer function in an ITV function that is realized by hardware, without having to separately provide a timer or clock exclusively for the ITV function and without increasing the hardware and the cost. 
     Another object of the present invention is to provide a computer-readable storage medium that stores a program for causing a computer to control a supply of power to an apparatus that operates independently of the computer, the program comprising a notifying procedure causing the computer to make a notification that notifies a need to control the power supplied to the apparatus if needed, based on a preset timer time and a present time acquired from a Real Time Clock (RTC) within the computer, regardless of a power state of the apparatus; and a supplying procedure causing the computer to supply information related to a time for controlling the power supplied to the apparatus, based on the notification made by the notifying procedure, regardless of the power state of the apparatus. According to the computer-readable storage medium of the present invention, it is possible to provide a timer function in an ITV function that is realized by hardware, without having to separately provide a timer or clock exclusively for the ITV function and without increasing the hardware and the cost. 
     Other objects and further features of the present invention will be apparent from the following detailed description when read in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a system block diagram showing an important part of an embodiment of an information processing apparatus according to the present invention; 
         FIG. 2  is a flow chart for explaining an operation of the information processing apparatus; and 
         FIG. 3  is a time chart showing power states at important parts of the information processing apparatus. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     A description will be given of embodiments of a control apparatus, an information processing apparatus and a computer-readable storage medium according to the present invention, by referring to the drawings. 
     Information processing apparatuses, such as personal computers (PCs), are provided with a Real Time Clock (RTC). Accordingly, it is conceivable to utilize this RTC in the ITV function that is realized by hardware. However, in order to supply the time information from the RTC directly to the ITV function, it is necessary to provide in the information apparatus an interface exclusively (or dedicated) for this purpose. In this case, it is not possible to use the existing hardware structure of the information processing apparatus, and it becomes necessary to modify the design of the hardware structure of the information processing apparatus. For this reason, although it is unnecessary to separately provide a timer or clock exclusively for the ITV function, it is difficult to provide the timer function in the ITV function without increasing the hardware and the cost, because of the need to modify the design of the hardware structure of the information processing apparatus. In addition, if the ITV function that is realized by hardware uses a power supply different from the power supply used by other parts of the information processing apparatus, the ITV function cannot receive the time information directly from the RTC unless not only the power of the information processing apparatus but also the power of the ITV function are ON. 
     The present invention makes the RTC usable by the ITV function that is realized by hardware, without requiring the hardware structure of the information processing apparatus to be modified. More particularly, as will be described later, the ITV function is made to have the timer function regardless of the power state of the ITV function, by an ON/OFF timer that uses a signal generatable with a standby power of the information processing apparatus, such as a General Purpose Output (GPO) of a General Purpose Input/Output (GPI/O) that is originally provided in the information processing apparatus. The GPI/O is originally used to transfer data depending on whether each bit has a high level or a low level, and is suited for use in the ON/OFF timer since there are no timing restrictions associated therewith. 
       FIG. 1  is a system block diagram showing an important part of an embodiment of the information processing apparatus according to the present invention. This embodiment of the information processing apparatus employs an embodiment of the control apparatus according to the present invention and an embodiment of the computer-readable storage medium according to the present invention. In this embodiment, it is assumed for the sake of convenience that the present invention is applied to the Personal Computer (PC). The PC may be a portable type such as a laptop PC or, a set-up type such as a desktop PC. 
     A PC  1  shown in  FIG. 1  has a known basic structure including a processor such as a CPU, a storage part such as a memory, an input part such as a remote control, a keyboard and a mouse, and a display part. The illustration and description of this basic structure of the PC  1  will be omitted.  FIG. 1  only shows parts of the PC  1  that are directly related to the subject matter of the present invention. The PC  1  has a first part (or PC part or apparatus)  11  and a second part (or ITV part or apparatus)  21 . The first part  11  includes an RTC  12  having a known structure that includes a crystal oscillator  13 , a known Basic Input Output System (BIOS)  14 , and a chip set  15 . The RTC  12 , the BIOS  14  and the chip set  15  form an ON and/or OFF (ON/OFF) timer of this embodiment. At least a portion of the BIOS  14  and at least a portion of the chip set  15  form a program of this embodiment that causes a computer to realize a timer function. This program may be stored in the computer-readable storage medium. 
     The BIOS  14  and the chip set  15  are realized by the processor and the storage part. The chip set  15  is the software that controls the entire hardware and the entire software of the PC  1 . In this embodiment, the chip set  15  also realizes a portion of the function of the RTC  12 . The RTC  12  is operable even with the standby power, such as when the power of the PC  1  is OFF. At least a portion of the functions of the BIOS  14  and the chip set  15  are operable with the standby power. Information  31  that is input by a user from the input part using a software on a known Operating System (OS) is supplied to the BIOS  14  of the first part  11 . Of course, the user may supply the information  31  to the BIOS  14  by directly operating the BIOS  14  from the input part. Accordingly, this embodiment can set time events of the ITV function, that is, the ON time and/or OFF time of the ON/OFF timer, using the interface of the PC  1 . 
     On the other hand, the second part  21  forms the ITV function that is realized by hardware. The second part  21  includes a power switch  22  that turns the power of the ITV function ON and OFF, an OR circuit  23 , and an ITV ON/OFF circuit  24 . The power switch  22  may be formed by a mechanical switch or button or, a button that is displayed on the display part and operated on the display part. In this embodiment, the power supply used by the second part  21  is different from the power supply used by the first part  11 , and the second part  21  operates independently of the first part  11 . It is not essential for the second part  21  to be provided within the PC  1 , and the second part  21  may be connected externally to the PC  1  as long as the second part  21  is connected to the first part  11 . For example, in the case where the PC  1  is a desktop PC, the second part  21  may be provided within a monitor part where the display part of the PC  1  is provided. 
       FIG. 2  is a flow chart for explaining the operation of the information processing apparatus shown in  FIG. 1 , that is, the operation of the PC  1 . In  FIG. 2 , a step S 1  inputs the information  31  for setting the ON time and/or OFF time of the ON/OFF timer of the ITV function to the PC  1  based on the operation made by the user from the input part. A step S 2  sets the ON time and/or OFF time of the ON/OFF timer of the ITV function in the BIOS  15  based on the information  31 . A step S 3  decides by the BIOS  14  whether or not the present time obtained from the RTC  12  has reached the set ON time or the set OFF time of the ON/OFF timer of the ITV function. The process advances to a step S 4  if the decision result in the step S 3  is YES. In other words, the step S 3  decides whether or not the power of the ITV function needs to be turned ON and/or OFF, and notifies the chip set  15  if the power of the ITV function needs to be turned ON and/or OFF. 
     The step S 4  asserts by the chip set  15  a signal of the General Purpose Output (GPO) of the General Purpose Input/Output (GPI/O). In other words, when notified from the BIOS  14  that the power of the ITV function needs to be turned ON and/or OFF, the step S 4  asserts the signal for turning the power of the ITV function ON and/or OFF. The signal of the GPO used in this embodiment has 2 bits, and indicates information related to the ON time of the ON/OFF timer or, information related to the OFF time of the ON/OFF timer. A step S 5  supplies the asserted signal of the GPO to the ITV ON/OFF circuit  24  within the second part  21  via the OR circuit  23 . A signal from the power switch  22  that turns the power of the ITV function ON and OFF, is also supplied to the OR circuit  23 . If the asserted signal of the GPO indicates the information related to the ON time of the ON/OFF timer, the OR circuit  23  supplies to the ITV ON/OFF circuit  24  an ON signal that turns ON the power of the ITV function regardless of the ON or OFF state of the power switch  22 . In addition, if the asserted signal of the GPO indicates the information related to the OFF time of the ON/OFF timer, the OR circuit  23  supplies to the ITV ON/OFF circuit  24  an OFF signal that turns OFF the power of the ITV function regardless of the ON or OFF state of the power switch  22 . If the signal of the GPO supplied to the OR circuit  23  is not asserted, the OR circuit  23  supplies to the ITV ON/OFF circuit  24  the ON signal that turns ON the power of the ITV function or, the OFF signal that turns OFF the power of the ITV function, depending on the ON and OFF states of the power switch  22 . Therefore, this embodiment can send the time events of the ITV function, that is, the ON time and/or OFF time of the ON/OFF timer, using the signal of the GPO. 
     A step S 6  decides whether or not the signal received by the ITV ON/OFF circuit  24  from the OR circuit  23  is the OFF signal. If the ITV ON/OFF circuit  24  receives the ON signal from the OR circuit  23  and the decision result in the step S 6  is NO, a step S 7  switches the power of the ITV function ON if OFF, by the ITV ON/OFF circuit  24 , and the process advances to a step S 9 . On the other hand, if the decision result in the step S 6  is YES, a step S 8  switches the power of the ITV function OFF if ON, by the ITV ON/OFF circuit  24 , and the process advances to the step S 9 . The step S 9  decides by the BIOS  14  whether or not a time required by the ITV ON/OFF circuit  24  to turn the power of the ITV function ON or OFF has elapsed and the ON time or the OFF time of the ON/OFF timer is set to a time after the present time. The process ends if the decision result in the step S 9  is NO, and the process returns to the step S 3  if the decision result in the step S 9  is YES. 
       FIG. 3  is a time chart showing power states at important parts of the information processing apparatus, that is, the PC  1 . In  FIG. 3 , ITV indicates the power state of the second part  21 , that is, the ITV function, PC indicates the power state of the PC  1 , and Chipset indicates the power state of the chip set  15  within the first part  11 . 
     In  FIG. 3 , it is assumed for the sake of convenience that the PC  1  is a desktop PC, and that in a state ST 1 , the power of the ITV function is OFF, the power of the PC  1  is OFF, and the power of the chip set  15  is OFF. For example, the PC  1  is not connected to an AC power supply in the state ST 1 , and only very limited functions, such as the RTC  12 , are operable using a battery within the PC  1  as the power supply. 
     For example, the PC  1  is connected to the AC power supply in a state ST 2 . In the state ST 2 , the power of the ITV function is ON, the power of the PC  1  is OFF, and the standby power is usable by the BIOS  14  and the chip set  15  within the PC  1 . In the state ST 2 , limited functions within the PC  1 , such as a portion of the BIOS  14  for executing the step S 3  shown in  FIG. 2  and a portion of the chip set  15  for executing the step S 4  shown in  FIG. 2 , are operable in addition to the RTC  12 . In other words, in the state ST 2 , it is possible for the BIOS  14  to acquire the present time from the RTC  12 , and it is possible for the chip set  15  to generate the signal of the GPO used in this embodiment. For this reason, if the ON time of the ON/OFF timer is set and the present time reaches this ON time, the power of the ITV function can be switched to the ON state as shown in  FIG. 3  even when the power of the PC  1  is in the OFF state. 
     For example, the PC  1  is connected to the AC power supply, the power of the ITV function is ON, and the power of the PC  1  is ON in a state ST 3 . In other words, in the state ST 3 , the power of the PC  1  is ON and all of the functions including the processor within the PC  1  are usable. 
     In the case where the PC  1  is a desktop PC, the power of the PC  1  is OFF in the state ST 1 , the power of the PC  1  is ON but the operation mode of the PC  1  is set to a power save mode in the state ST 2 , and the power of the PC  1  is ON and the operation mode of the PC  1  is set to the normal mode in the state ST 3 . 
     The program for causing the computer to carry out the operation described above may be stored in any type of computer-readable storage medium, including the storage part of the PC  1 . The computer-readable storage medium may be formed by a semiconductor memory device, a magnetic recording medium, an optical recording medium, a magneto-optical recording medium or the like. 
     Therefore, the present invention is applicable to information processing apparatuses, such as personal computers, provided with the ITV function that is realized by hardware or, connectable to the ITV function that is realized by hardware. 
     Further, the present invention is not limited to these embodiments, but various variations and modifications may be made without departing from the scope of the present invention.