Abstract:
A dual prompting device for incoming call of a mobile phone is provided. When a mobile phone receives an incoming signal, prompting ring or music of an incoming call not only can be sent out by a mobile phone&#39;s own speaker but also can be sent out by an externally wired speaker that placed in an earpiece wire. This device can allow people who always place their mobile phones in bags, in particular of females, to avoid mishearing of an incoming ring or music so that to avoid missing a phone call, because mobile phones are placed in bags.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     This invention generally relates to a prompting device and method and in particular relates to a dual prompting device and method for incoming call of a mobile phone, wherein prompting sound not only can be sent out from a mobile phone&#39;s own speakers, but also can be sent out from speakers placed in an earpiece wire.  
         [0003]     2. Description of the Related Art  
         [0004]     Generally, female users don&#39;t like to hang their mobile phones on waists or chests, but to put them in bags. When mobile phones receive incoming call signals and send out rings or music, the users of mobile phones will miss the phone call because they cannot hear rings or music of an incoming call from the bag. As shown in  FIG. 1 , a conventional mobile phone earpiece can allow users through earpieces to receive the other party&#39;s voice and through attached microphone of an earpiece wire to delivers users&#39;voices. Even though users put mobile phones in bags, it will not hinder a communication between the phone user and the other party but conventional mobile phone&#39;s earpieces cannot overcome the problem that users cannot hear incoming call rings when mobile phones are placed in bags.  
         [0005]     Therefore, this invention provides a dual prompting device and method for incoming call of a mobile phone to solve the mentioned problem.  
       SUMMARY OF THE INVENTION  
       [0006]     The object of this invention is to provide a dual prompting device and method for incoming call of a mobile phone, so that mobile phone users can avoid missing phone calls because their mobile phones are put in bags that they cannot hear the incoming rings or music.  
         [0007]     The other object of this invention is to provide a dual prompting device and method for incoming call of a mobile phone, wherein prompting sound not only can be sent out from mobile phone&#39;s own speakers but also can be sent out from an externally wired speaker placed in an earpiece wire.  
         [0008]     In order to achieve the above-mentioned objects, this invention provides a dual prompting device for a mobile phone, it includes: an externally wired speaker, placed beyond a mobile phone; an externally wired microphone, placed beyond a mobile phone; an externally wired press key, placed beyond a mobile phone, used to switch to receive a phone call; an earpiece line-in outlet; an earpiece wire; a first switch module, placed in a mobile phone, used to switch the connection of an earpiece wire outlet; a second switch module, placed beyond a mobile phone, used to switch an externally wired speaker&#39;s output circuit and an externally wired microphone&#39;s input circuit; and a control chip, placed in a mobile phone, used to receive signals from the earpiece wire plugged in the earpiece line-in outlet and signals of the externally connected key or a built-in key being pressed, so to activate or disconnect a built-in speakers&#39; output circuit and a built-in microphone&#39;s input circuit and to control the first switch module and the second switch module.  
         [0009]     Wherein the earpiece line-in outlet and the earpiece wire not only can deliver earpiece&#39;s voice signals, but also can deliver the control chip&#39;s control signals to the second switch module, and also deliver singles of the plugged-in earpiece wire and the externally wired press key pressed signals to the control chip.  
         [0010]     While the earpiece wire does not plug in the earpiece line-in outlet, the control chip detects an incoming call. The control chip will send out a signal to control the first switch module to disconnect the connection with the earpiece line-in outlet so that a built-in speaker&#39;s output circuit is activated and a built-in microphone&#39;s input circuit is disconnected. Then, the built-in speaker rings an incoming ring.  
         [0011]     While the earpiece wire does plug in the earpiece line-in outlet, the control chip detects an incoming call. The control chip will control the second switch module to activate an externally wired speaker&#39;s output circuit and disconnect an externally wired microphone&#39;s input circuit. At the same time, the control chip activates a built-in speaker&#39;s output circuit and disconnects a built-in microphone&#39;s input circuit. Then, the built-in speaker and the externally wired speaker ring an incoming ring at the same time.  
         [0012]     After the control chip receives the externally wired press key or a built-in press key pressed signal, the control chip controls the second switch module to activate the externally wired microphone&#39;s input circuit and disconnect the externally wired speaker&#39;s output circuit, and the control chip activates the built-in microphone&#39;s input circuit and disconnects the built-in speaker&#39;s output circuit.  
         [0013]     This invention also provides a dual prompting method for mobile phone, which includes following steps: a control chip detecting an incoming call; the control chip ascertaining if a mobile phone is connected or disconnect with an earpiece wire; a first switch module disconnecting the connection with an earpiece line-in outlet; a control chip activating a built-in speaker&#39;s output circuit; a control chip disconnecting a built-in microphone&#39;s input circuit; detecting a built-in press key being pressed; a control chip disconnecting the built-in speaker&#39;s output circuit; a control chip activating the built-in microphone&#39;s input circuit; a first switch module connecting with the earpiece&#39;s line-in outlet; a second switch module activating an externally wired speaker&#39;s output circuit; the second switch module disconnecting an externally wired microphone&#39;s input circuit; detecting an externally wired press key being pressed; the second switch module activating the externally wired microphone&#39;s input circuit; and the second switch module disconnecting the externally wired speaker&#39;s output circuit. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]      FIG. 1  is a descriptive view of a conventional mobile phone&#39;s earpiece;  
         [0015]      FIG. 2  is a block diagram of preferred embodiment of dual prompting device in accordance with the present invention;  
         [0016]      FIG. 3A  is a flow chart of a dual prompting method which is executed by the dual prompting device in accordance with the present invention; and  
         [0017]      FIG. 3B  is the whole processes indicated by a symbol “A” in  FIG. 3A .  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0018]      FIG. 2  is a block diagram of one embodiment of dual prompting device of the invention. This invention&#39;s mobile phone&#39;s dual prompting device includes: a first switch module  10 , placed in a mobile phone  1 ; a second switch module  20 , placed beyond a mobile phone  1 ; an externally wired speaker  21 , placed beyond a mobile phone  1 ; an externally wired microphone  22 , placed beyond a mobile phone  1 ; an externally wired press key  23 , placed beyond a mobile phone  1 , used to receive a phone call; an earpiece line-in outlet  30 ; an earpiece wire  31 ; and a control chip  40 , placed in a mobile phone  1 .  
         [0019]     The control chip  40  further includes a Speak P pin, a Speak N pin, a MIC P pin, a MIC N pin, a control pin  41 , an earpiece detect pin  42 , a press key detect pin  43 , and a speaker and microphone switch pin  44 . The Speak P pin and Speak N pin each is presented as a voice frequency positive and negative output pin; the MIC P pin and MIC N pin each is presented as a microphone positive and negative input pin; the control pin  41  controls the first switch module  10  to connect or disconnect with the earpiece line-in outlet  30 ; the earpiece detect pin  42  detects the earpiece line-in outlet  30  having connected or disconnected with the height or low electric potential variation of the earpiece wire  31 ; the press key detect pin  43  detects the built-in press key  13  or the externally wired press key  23  being pressed or not; after or before the press key detect pin  43  receiving the signal of the press keys being pressed, the speaker and microphone switch pin  44  processes to control the second switch module  20  to activate the speaker&#39;s output circuit or the microphone&#39;s input circuit. The control chip  40  uses the control pin  41  to connect and control the first switch module  10  to connect or disconnect with the earpiece line-in outlet  30 . The control chip  40  also controls the output circuit of a built-in speaker  11  and the input circuit of a built-in microphone  12 .  
         [0020]     The earpiece line-in outlet  30  and the earpiece wire  31  not only can deliver a voice signal of earpiece, but also can deliver the signals of the Speak P pin, the Speak N pin, the MIC P pin, the MIC N pin, the earpiece detect pin  42 , the press key detect pin  43 , and the speaker and microphone switch pin  44 . When the earpiece wire  31  plugged in the earpiece line-in outlet  30 , once having an incoming call, the control chip  40  will control the first switch module  10  through the control pin  41  and let the above-mentioned pin&#39;s signal wire through the first switch module  10  connects with the earpiece line-in outlet  30 . When the earpiece wire  31  does not connect with the earpiece line-in outlet  30 , once having an incoming call, the control chip  40  will, through the control pin  41 , control the first switch module  10  to disconnect the first switch module  10  with the earpiece line-in outlet  30 .  
         [0021]     The first switch module  10  is place in a mobile phone  1  to connect with the Speak P pin, Speak N pin, MIC P pin, MIC N pin, control pin  41 , earpiece detect pin  42 , press key detect pin  43  and speaker and microphone switch pin  44 . When the control chip  40  detects an incoming call, depending on if the earpiece wire  31  inserts into the earpiece line-in outlet  30 , the first switch module  10  receives the signal of the control pin  41  of the control chip  40  and is controlled to determine, other than the control pin  41 , the above-mentioned pins&#39; signal wire connecting or disconnecting with the earpiece line-in outlet  30 , and is controlled.  
         [0022]     The second switch module  20  can be through the earpiece wire  31  and the earpiece line-in outlet  30  connecting with the Speak P pin, Speak N pin, MIC P pin, MIC N pin, and speaker and microphone switch pin  44  and through signal wires separately connecting with the externally wired speaker  21  and the externally wired microphone  22 . When the earpiece wire  31  connects with the earpiece line-in outlet  30  and the control chip  40  detects an incoming call, the control chip  40  can be through the speaker and microphone switch pin  44  to control the second switch module  20  to activate the output circuit of externally wired speaker  21  and disconnect the input circuit of externally wired microphone  22 . When the press key detect pin  43  of control chip  40  detects the externally wired press key  23  being pressed, the control chip  40  can be through the speaker and microphone switch pin  44  to control the second switch module  20  to activate with the input circuit of externally wired microphone  22  and disconnect the output circuit of externally wired speaker  21 .  
         [0023]     The externally wired press key  23 , through the earpiece wire  31  and the earpiece line-in outlet  30 , delivers the key pressed signal to the press key detect pin  43 .  
         [0024]     A conventional earpiece  32 , through the earpiece wire  31  and the earpiece line-in outlet  30 , connects with the earpiece detect pin  42 . When the conventional earpiece  32 , through the earpiece wire  31 , connects with the earpiece line-in outlet  30 , the earpiece detect pin  42  will be at a low electric potential. The conventional earpiece  32 , also through the earpiece wire  31  and an earpiece line-in outlet  30 , receives voice signals sent out by the control chip  40  to allow users to receive the other party&#39;s voice.  
         [0025]     The second switch module  20 , the externally wired speaker  21 , the externally wired microphone  22 , and the externally wired press key  23  can be fabricated as an externally wired module  2 , and the externally wired module  2  is packed in a case.  
         [0026]      FIG. 3A  and  FIG. 3B  are flow charts of a dual prompting method which is executed by the dual prompting device according to the invention, wherein the  FIG. 3B  is the whole processes indicated by a symbol “A” in  FIG. 3A . According to this embodiment, while a control chip detects an incoming call (S 10 ); the control chip will judge if a mobile phone is plugged in with an earpiece wire (S 20 ); if an earpiece wire has been plugged in, a first switch module disconnects the connection with an earpiece line-in outlet (S 30 ); the control chip activates a built-in speaker&#39;s output circuit (S 40 ), and the built-in speaker rings an incoming ring; the control chip disconnects a built-in microphone&#39;s input circuit (S 50 ); the control chip detects a built-in press key being pressed (S 60 ); the control chip disconnects the built-in speaker&#39;s output circuit (S 70 ); and the control chip activates the built-in microphone&#39;s input circuit (S 80 ), and at this moment users can use the built-in microphone to have a voice communication with the other party. If an earpiece wire is not connected, the first switch module will connect with an earpiece line-in outlet (S 90 ); a second switch module activates an externally wired speaker&#39;s output circuit (S 100 ); and the second switch module disconnects an externally wired microphone&#39;s input circuit (S 110 ); and the control chip activates a built-in speaker&#39;s output circuit (S 40 ); and the control chip disconnects a built-in microphone&#39;s input circuit (S 50 ), and then both the external speaker and the built-in speaker ring an incoming ring; when the control chip detects an externally wired press key being pressed (S 120 ); the second switch module activates the externally wired microphone&#39;s input circuit (S 130 ); and the second switch module disconnects the externally wired speaker&#39;s output circuit (S 140 ); and the control chip disconnects the built-in speaker&#39;s output circuit (S 70 ); and the control chip activates the built-in microphone&#39;s input circuit (S 80 ), and at this moment users can use the externally wired microphone or the built-in microphone to have voice communication with the other party.