Abstract:
A method for triggering power supply module switch of a cordless electric-apparatus which includes a metal inductive area and an electrostatic inductive element comprising the following steps: when user body approaches the device to a predetermine distance which is less than the electrostatic induction distance, the electrostatic inductive element detecting electrostatic charge from user body so as to turn a switch within the electrostatic inductive element on; according to the switch turned on, a power supply module supplying power for the cordless electric-apparatus; when user body leaving away from the cordless electric-apparatus exceed the electrostatic induction, the switch within the electrostatic inductive element being turn off; and according to the switch within the electrostatic inductive element turned off, the power supply module supplying a part power for the cordless electric-apparatus. A device for triggering power supply module switch of a cordless electric-apparatus comprising: a metal inductive area placed on the shell of the cordless electric-apparatus; an electrostatic inductive element having an inductive electrode connected to the metal inductive area, so as to detect whether the distance between user body and the metal inductive area less than the electrostatic induction distance; and a power supply module connecting to the electrostatic inductive element.

Description:
FIELD OF THE INVENTION  
         [0001]    The invention generally relates to a method and device for triggering power supply module switch of a cordless electric-apparatus and more particularly to a method and device for triggering the power supply module switch of the cordless hand-held apparatus through inducting electrostatic charge from user body.  
         BACKGROUND OF THE INVENTION  
         [0002]    Generally, while user does not use the cordless hand-held apparatus, the cordless electric-apparatus still consumes power as normal, such consumption is unnecessary. It shortens battery working time, and the user must replace battery frequently.  
           [0003]    Thereafter, typical examples for minimizing the power consumption are disclosed. A cordless electric-apparatus utilizes a device having a timer to decrease power consumption. When user stop working, the timer starts timing till a predetermine time expired, the device will change cordless hand-held apparatus working state to a sleep mode in order to decrease power consumption. When the device detects actions that the apparatus was used again like apparatus moved or keys pressed, the device will transmit signal to wake up the apparatus for working as normal. Such device can decrease the power consumption, however, the cordless hand-held apparatus will consume electrical power until the apparatus switching to power saving state or sleep mode.  
           [0004]    Other typical examples for minimizing the power consumption is disclosed. A cordless electric-apparatus has a light source emitting a light beam and a detector receiving light beam reflected from user body. Therefore, the apparatus will know whether user is using cordless hand-held apparatus or not. According to the judgment, the apparatus working state was switched to power saving mode. However, disadvantage of the design is that the light source will consume electrical power, and such invention can not judge whether the shield is body or not, that is, when other objects shield the light beam, the cordless hand-held apparatus will be activated.  
         SUMMARY OF THE INVENTION  
         [0005]    An object of the present invention is to provide a method and device for triggering power switch of a cordless electric-apparatus, the method and device control the power supplying through inducting the electrostatic charge from user body, therefore, when user body approaches the device to a predetermine distance which is the farthest distance that electrostatic induction comes into being, the cordless hand-held apparatus will be wake up to work as normal. On the contrary, when user body leaves away from the device exceed the distance, the power supply module will supply a part of power to the cordless hand-held apparatus or stop supplying power to the cordless hand-held apparatus so as to minimize the power consumption of the cordless hand-held apparatus.  
           [0006]    Another object of the present invention is to provide a method utilizing electrostatic induction to trigger power switch of a cordless electric-apparatus. When user body approaches an electrostatic inductive device, the power supply module of the cordless electric-apparatus will supply power to the cordless hand-held apparatus. When user body leaves away from the electrostatic inductive device, the power supply module will supply a part of power to the cordless hand-held apparatus or stop supplying power to he cordless hand-held apparatus so as to minimize the power consumption of the cordless hand-held apparatus right away.  
           [0007]    The third object of the present invention is to provide a device having an electrostatic inductive device to trigger power switch of a cordless electric-apparatus. The device comprises a metal inductive area placed on the cordless hand-held apparatus, an electrostatic inductive element connects to the metal inductive area and a power supply module connects to the electrostatic inductive device. The electrostatic inductive device controls the power supply module through inducting the electrostatic charge from user body so as to decrease the power consumption. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]    The present invention will be apparent to those skilled in the art by reading the following description of preferred embodiments thereof, with reference to the attached drawings, in which:  
         [0009]    [0009]FIG. 1 is a first embodiment of the present invention showing the working principle of the method and device for triggering power supply module switch of a cordless electric-apparatus;  
         [0010]    [0010]FIG. 2 is a second embodiment of the present invention showing the working principle of the method and device for triggering power supply module switch of a cordless electric-apparatus;  
         [0011]    [0011]FIG. 3 is a perspective of a mouse which utilizes the device for triggering power supply module switch of the present invention;  
         [0012]    [0012]FIG. 4 is a partial cross-sectional view of the mouse similar to the mouse shown in FIG. 3;  
         [0013]    [0013]FIG. 5 is a partial cross-sectional view of a mouse in which a metal inductive area of the present invention is formed on a printed circuit board of the mouse;  
         [0014]    [0014]FIG. 6 is a perspective of a cordless phone in which the device of the present invention is utilized;  
         [0015]    [0015]FIG. 7 is a partial cross-sectional of the cordless phone similar to that shown in FIG. 6;  
         [0016]    [0016]FIG. 8 is a partial cross-sectional of a cordless phone in which a metal inductive area of the present invention is formed on a printed circuit board of a printed circuit board of the cordless phone;  
         [0017]    [0017]FIG. 9 is a perspective view of a PDA (Personal Digital Assistant) in which the device of the present invention is utilized;  
         [0018]    [0018]FIG. 10 is a partial cross-sectional of the PDA in which a metal inductive area of the present invention is formed on a printed circuit board of the PDA; 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0019]    Please refer to FIG. 1. FIG. 1 is a first embodiment showing the working principle of the present invention. A method and device for triggering power supply module switch of a cordless electric-apparatus of the present invention utilizes electrostatic induction to trigger power switch applied in the cordless hand-held apparatus. The present invention provides an electrostatic inductive element  4  connected to a power supply module  6 . Both of the inductive element  4  and the power supply module  6  are connected to a grounding  10 . The electrostatic inductive element  4  may comprises a metal inductive area (which will be further detailed described in FIGS.  3 ˜ 10 ) and inductive electrodes (not shown). While a user body  2  approaches or touches the inductive electrodes of the electrostatic inductive element  4 , or the user body  2  approaches or touch the metal inductive area that conducts with the inductive electrodes, electrostatic inductive element  4  will induct electrostatic charge from the user body  2 . At the same time, the inductive element  4 , the user body  2  and the grounding  10  will buildup a loop, thus, an inductive switch (not shown) within the electrostatic inductive element  4  will be turned on so as to control the power supply module  6  and the cordless electric-apparatus to form a loop. Therefore, the cordless electric-apparatus forms a performance mode for working. On the contrary, the user body  2  leaves away from the inductive electrodes or the metal inductive area of the electrostatic inductive element  4 , the loop formed by the electrostatic inductive element  4 , the body  2  and the grounding  10  will be cut off. The inductive switch within electrostatic inductive element  4  will also be turned off, and the circuit between the power supply module  6  and the cordless electric-apparatus will be opened, then, the cordless electric-apparatus will stop working right away to be a sleep mode.  
         [0020]    [0020]FIG. 2 is a second embodiment showing the working principle of the present invention. The second embodiment comprises an electrostatic inductive element  4 , a CPU (Central Process Unit)  8  connected to the electrostatic inductive element  4  and a power supply module  6  connected to the CPU  8 . Both of the inductive element  4  and the power supply module  6  are connected to a grounding  10 . The CPU  8  controls the power supply module  6  to provide the cordless electric-apparatus with two working mode, that is, performance mode and sleep mode. Under performance mode, the power supply module  6  supplies power for the cordless electric-apparatus. Under sleep mode, the power supply module  6  supplies a part of power for the cordless electric-apparatus. While the user body  2  approaches or touches inductive electrodes of the electrostatic inductive element  4  or the user body  2  approaches or touches a metal inductive area that conducts with the inductive electrodes, the electrostatic inductive element  4  will induct electrostatic charge from the user body  2 . The electrostatic inductive element  4 , the user body  2  and the grounding  10  will buildup a loop, a inductive switch within the electrostatic inductive element will be turned on, the CPU  8  within cordless apparatus will detect the state that the inductive switch was turned on so as to transmit a command to the power supply module  6  to supply power to the cordless apparatus and will switch to wake up mode. While the user body  2  leaves away from the inductive electrodes or the metal inductive area of the electrostatic inductive element  4 , the loop formed by the electrostatic inductive element  4 , the user body  2  and the grounding  10  will be cut off. The inductive switch within electrostatic inductive element  4  will also be turned off, the CPU  8  within cordless apparatus will detect the state that the inductive switch was turned off so as to send a command to make the power supply module stopping normal power supply, and the CPU  8  can also send a sleeping command to make the cordless apparatus switch to sleeping mode. Generally, the state of the power supply module  6  is set the same as the state of the electrostatic inductive element  4 . Further, the state of the power supply module  6  can be set as reverse to the state of the electrostatic inductive element  4 .  
         [0021]    Referring to FIG. 3, a cordless mouse  20  utilizes the device of the present invention for triggering power supply module switch. The cordless mouse  20  comprises a left key  21 , a right key  23  and a wheel  22  placed on the top of the cordless mouse  20 , these components are similar to conventional mouse. The cordless mouse  20  further comprises a first metal inductive area  25  that will induct electrostatic charge from a user palm of the user body  2  located in the rear of the cordless mouse  20 ; a second metal inductive area  26  that will induct electrostatic charge from user fingers of the user body  2  located in the lateral of the cordless mouse  20 . The first metal inductive area  25  and the second metal inductive area  26  directly connect to inductive electrode of the electrostatic inductive element  4  (as illustrated in FIG. 1) within the cordless mouse  20 . Therefore, the first and second metal inductive area  25  and  26  will induct electrostatic charge from user body  2  when user body  2  approaches or touches the metal inductive area  25  or  26 , the induction produced by the metal inductive area  25  or  26  will be transmitted to the electrostatic inductive element  4 , a inductive switch (not shown) within the electrostatic inductive element  4  will be turned on so as to make the power supply module  6  to supply power to the cordless mouse  20 . On the contrary, while user body  2  leaves away from the metal inductive area  25 ,  26 , the electrostatic inductive element  4  will detect the change of the electrostatic charge, and the inductive switch within the electrostatic inductive element  4  will be turned off so as to make the power supply module  6  stop supplying power to the cordless mouse  20 . Same as described above, while the cordless mouse  20  equipped with the CPU  8 , the inductive switch within the electrostatic inductive element  4  will produce a signal, the CPU  8  will detect the signal and will transmit “turn on” or “turn off” command to the power supply module  6  to supply power to the cordless mouse  20  or not. Such arrangement achieves the general expectation of minimizing the power consumption of the cordless mouse  20 .  
         [0022]    [0022]FIG. 4 is a cross-sectional view of cordless mouse  30  similar to the cordless mouse  20  shown in FIG. 3. The cordless mouse  30  has a metal inductive area  35  located within cordless mouse  30  and abuts on the top. The metal inductive area  35  directly connects to inductive electrodes of an electrostatic inductive element  34  within the cordless mouse  30 . While user palm of the user body  2  approaches or touches the cordless mouse  30 , the metal inductive area  35  will induct the electrostatic charge from user body  12 . The cordless phone  30  was designed that the shell thickness less than the electrostatic induction distance. An inductive switch (not shown) within the electrostatic inductive element  4  will be turned on so as to make the power supply module  6  supply power to the cordless mouse  30 . While the cordless mouse  30  equipped with a CPU  8 , the inductive switch within the electrostatic inductive element  4  will produce a signal. The CPU  8  will detect the signal and will send “turn on” or “turn off” command to the power supply module  6  to supply power to the cordless mouse  30  or not. On the contrary, while user body leaves away from the cordless mouse  30 , the electrostatic inductive element  4  will detect the change of the electrostatic charge, and the inductive switch within the electrostatic inductive element  4  will be turned off so as to make the power supply module  6  stop supplying power to the cordless mouse  30 . Same as described above, while the cordless mouse  30  equipped with a CPU  8 , the inductive switch within the electrostatic inductive element  4  will produce a signal for the CPU  8 . The CPU  8  will detect the signal and will send “turn off” command to the power supply module  6 , the power supply module  6  would not supply power to the cordless mouse  30 , and the working mode will be switched to sleep mode. Such arrangement achieves the general expectation of minimizing the power consumption of the cordless mouse  30 .  
         [0023]    [0023]FIG. 5 shows a cordless mouse  40  in which a metal inductive area of the present invention is formed on a printed circuit board of the cordless mouse  40 . The cordless mouse  40  has a PCB (printed circuit board)  47  which shape fits close the shape of cross section of the cordless mouse  40 . The PCB  47  abuts on inner sidepiece. A metal inductive area  45  is equipped along the PCB  47  edge and connected to inductive electrodes of an electrostatic inductive element  44  for detecting electrostatic charge from the user body  2 . Such arrangements will make the electrostatic inductive element  44  detecting whether the user uses the cordless mouse  40  or not, in order to control the switch of the power supply module  6  to “turn on” or “turn off”. Therefore, the expectation of minimizing the power consumption of the cordless mouse  40  was achieved.  
         [0024]    Referring to FIG. 6, a cordless phone  50  comprises an antenna  51  for receiving and transmitting signals, a headphone  52 , a mike  59 , a display  53  and keys  58  arranged on a front panel of the cordless phone  50 . A metal inductive area  55  surrounds lateral of the cordless phone  50  and connects to the electrostatic inductive element (similar to that shown in FIG. 7) for detecting electrostatic charge from user body  2 . While user holding the cordless phone  50 , the metal inductive area  55  will detect electrostatic charge from user body  2  so as to turn the inductive switch within the electrostatic inductive element on, therefore, CPU  8  placed on the cordless phone  50  will detect the inductive switch and transmit a signal to power supply module  6  to supply power to the cordless phone  50 . Accordingly, operating interface (including lights source, keys control, sound identify and so on) of the cordless phone  50  will be activated and prepared for receiving command from user. While user does not hold the cordless phone  50 , the metal inductive area  55  will detect change that electrostatic charge from user body so as to turn the inductive switch within the electrostatic inductive element off, therefore, CPU  8  placed on the cordless phone  50  will detect the inductive switch and transmit a signal and will send “turn off” command to the power supply module  6 . The power supply module  6  would not supply power for the operating interface. Thus, the expectation of minimizing the power consumption of the cordless phone  50  was achieved.  
         [0025]    [0025]FIG. 7 is a cross-sectional of a cordless phone  60  similar to that shown in FIG. 6. The cordless phone  60  has a metal inductive area  65  located within the cordless mouse  60  and abutted on the rear and the lateral of the cordless mouse  60 . An electrostatic inductive element  64  is connected to the metal inductive area  65 . The metal inductive area  65  directly connects to inductive electrode of the electrostatic inductive element  64 . While user holds the cordless phone  60 , for the reason that the cordless phone  60  was designed that the shell thickness less than the electrostatic induction distance, the metal inductive area  65  will detect electrostatic charge from user body  2  so as to turn the inductive switch within the electrostatic inductive element  64  on. Therefore, CPU  8  placed on the cordless phone  60  will detect the inductive switch and transmit a signal to the power supply module  6  to supply power for the cordless phone  60 . Accordingly, operating interface (including lights source, keys control, sound identify and so on) of the cordless phone will be activated and prepared for receiving command from users. While user does not hold the cordless phone  60 , the metal inductive area  65  will detect change that electrostatic charge from user body  2  so as to turn the inductive switch within the electrostatic inductive element off. Therefore, CPU  8  placed on the cordless phone  60  will detect the inductive switch and transmit a signal to the power supply module  6 . The power supply module  6  would not supply power for the operating interface of the cordless phone  60 . Thus, the expectation of minimizing the power consumption of the cordless phone  60  was achieved.  
         [0026]    [0026]FIG. 8 is a partial cross-sectional of a cordless phone  70 . The cordless phone  70  has a PCB (printed circuit board)  77  which shape fits close the shape of cross section of the cordless phone  70 . The PCB  77  abuts on inner sidepiece of the cordless phone  70 . A metal inductive area  75  is equipped along the edge of the PCB  77  and connects to inductive electrodes of an electrostatic inductive element  74  for detecting electrostatic charge from user body. Such arrangements will make the electrostatic inductive element  74  detecting whether the user using the cordless phone  70  or not in order to control power supply module switch “turn on” or “turn off”. So that the expectation of minimizing the power consumption of the cordless phone  70  was achieved.  
         [0027]    [0027]FIG. 9 is a perspective of a PDA (Personal Digital Assistant)  80 . The PDA  80  comprises a display screen  83  and several keys  89 . A metal inductive area  85  directly connects to the electrostatic inductive element (not shown in FIG. 9) for detecting electrostatic charge from user body  2 . The metal inductive area  85  surrounds lateral of the cordless phone  80 . While user holds the PDA  80 , the metal inductive area  85  will detect electrostatic charge from user body  2  so as to turn the inductive switch within the electrostatic inductive element on. Therefore, CPU  8  placed on the PDA  80  will detect the inductive switch and transmit a signal to power supply module  6  to supply power to the PDA  80 . Accordingly, operating interface (including lights source, keys control, and so on) of the PDA  80  will be activated and prepared for receiving command from users. While user does not hold the PDA  80 , the metal inductive area  85  will detect change that electrostatic charge from user body  2  so as to turn the inductive switch within the electrostatic inductive element off. Therefore, CPU  8  placed on the PDA  80  will detect the inductive switch and transmit a signal to the power supply module  6 . The power supply module  6  would not supply power for the operating interface of the PDA  80 . Thus, the expectation of minimizing the power consumption of the PDA was achieved.  
         [0028]    [0028]FIG. 10 is a partial cross-sectional of a PDA  90 . The PDA  90  has a PCB (printed circuit board)  97  which shape fits close the shape that cross section of the PDA  90 . The PCB  97  abuts on inner sidepiece of the PDA  90 . A metal inductive area  95  is equipped along the edge of the PCB  97  and connects to inductive electrodes of the electrostatic inductive element  94  for detecting electrostatic charge from user body  2 . Thickness of the shell of the PDA  90  was less than the electrostatic induction distance. While user holds the PDA  90 , the metal inductive area  95  will detect electrostatic charge from user body  2  so as to turn the inductive switch within the electrostatic inductive element  94  on. Therefore, the PDA  90  will quickly detect whether or not the user using the PDA  90  so in order to control the power module  6  to supply power to the PDA  90 . The expectation of minimizing the power consumption of the PDA  90  was achieved.  
         [0029]    The method and device for triggering power supply module switch of a cordless electric-apparatus of the present invention will not supply power as normal except electrostatic inductive elements inductive switch was turn on, therefore, it is sure that cordless hand-held apparatus will achieve the expectation of minimizing the power consumption.  
         [0030]    This invention has been described with reference to specific embodiments, this description is not to be construed in a limiting sense. For example, those skilled in the art will recognize modifications and alterations which may be made to the embodiments illustrated herein. However, it is contemplated that such modifications can be made without departing the scope and spirit of the invention as defined in the following claims.