Abstract:
A detection device detects the integrity of a connection between respective connectors of two devices. The detection device includes a control chip, an electronic switch, and an alarm member. The control chip is connected to the alarm member through the electronic switch. When the detection device works, the control chip is connected to the detection pin of the first connector. When the first connector is properly connected to the second connector, the detection pin outputs a first signal to the control chip causing the electronic switch to be off. When the first connector is connected with the second connector improperly, the detection pin outputs a second signal and the control chip turns on the electronic switch, sounding an alarm.

Description:
FIELD 
       [0001]    The subject matter herein generally relates to a connection detection system and a detection device. 
       BACKGROUND 
       [0002]    HDMI (High Definition Multimedia Interface) is a display interface and is widely used for a computer or a smart TV. However, if a HDMI of a display is connected to a HDMI of a motherboard improperly, the display will appear black screen. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0003]    Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
           [0004]      FIG. 1  is a block diagram of an embodiment of a detection system comprising a detection device. 
           [0005]      FIG. 2  is a block diagram of the detection device of  FIG. 1 . 
           [0006]      FIG. 3  is a circuit diagram of the detection device of  FIG. 1  in a first exemplary embodiment. 
           [0007]      FIG. 4  is a circuit diagram of the detection device of  FIG. 1  in a second exemplary embodiment. 
           [0008]      FIG. 5  is a circuit diagram of the detection device of  FIG. 1  in a third exemplary embodiment. 
       
    
    
     DETAILED DESCRIPTION 
       [0009]    It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
         [0010]    Several definitions that apply throughout this disclosure will now be presented. 
         [0011]    The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. 
         [0012]    The present disclosure relates to a detection system and a detection device. 
         [0013]      FIG. 1  illustrates an exemplary embodiment of a detection system  1000 . The detection system  1000  can comprise a detection device  100 , a first electronic device  200  and a second electronic device  300 . The first electronic device  200  can comprise a first connector  220 , and the second electronic device  300  can comprise a second connector  320 . The first connector  220  is configured to be electrically coupled to the second connector  320  and the detection device  100 . The detection device  100  is configured to detect a connection between the first connector  220  of the first electronic device  200  and the second connector  320  of the second electronic device  300 . In at least one embodiment, the first electronic device  200  is a motherboard, the second electronic device  300  is a display, and the first connector  220  and the second connector  320  are both HDMI (High Definition Multimedia Interface) connectors. In other embodiments, the first connector  220  and the second connector  320  can be other interface such as DVI (Digital Visual Interface) or Display Port connectors. 
         [0014]      FIG. 2  and  FIG. 3  illustrate a first exemplary embodiment of a detection device  100 . The detection device  100  can comprise a control chip  120 , an electronic switch  160 , and an alarm member  180 . The first connector  220  can comprise a detection pin HPD and a power supply pin VCC. The control chip  120  can comprise an input pin GPIO and an output pin BEEP. The electronic switch  160  can comprise a first terminal, a second terminal, and a third terminal. The alarm member  180  can comprise a first terminal and a second terminal. The input pin GPIO of the control chip  120  is electrically coupled to the detection pin HPD of the first connector  220 , when the detection device  100  is configured to detect the connection between the first connector  220  and the second connector  320 . The power supply pin VCC of the first connector  220  is electrically coupled to a power supply 5V. The first terminal of the electronic switch  160  is electrically coupled to the output pin BEEP of the control chip  120  through a resistor R 1 . The second terminal of the electronic switch  160  is electrically coupled to the first terminal of the alarm member  180 . The third terminal of the electronic switch  160  is electrically coupled to ground. The second terminal of the alarm member  180  is electrically coupled to a power supply +5V_AUX through a resistor R 2 . 
         [0015]    In present embodiment, the control chip  120  can be a CODEC, the detection pin HPD can be a hot-swap detection pin, the electronic switch  160  can be an NPN-type bipolar junction transistor, and the alarm member  180  can comprise a buzzer B 1 . The first terminal, the second terminal, and the third terminal of the electronic switch  160  correspond to a base, a collector, and an emitter of the NPN-type bipolar junction transistor. The first terminal and the second terminal of the alarm member  180  correspond to a ground terminal and a power supply terminal of the buzzer B 1 . In other embodiments, the electronic switch  160  can be an n-channel metal-oxide semiconductor field-effect transistor (NMOSFET) or other suitable switch having similar functions. 
         [0016]    In use, the second connector  320  of the second electronic device  300  is configured to be electrically coupled to the first connector  220  of the first electronic device  200 . If the second electronic device  300  operates abnormally, such as a screen of the second electronic device  300  appearing black, the detection device  100  is needed to detect an integrity of the connection between the first connector  220  of the first electronic device  200  and the second connector  320  of the second electronic device  300 . If the second electronic device  300  operates normally, the first connector  220  is taken as properly coupled electrically to the second connector  320  and the detection device  100  is not needed. 
         [0017]    When the detection device  100  is used to detect the integrity of the connection between the first connector  220  and the second connector  320 , the input pin GPIO is electrically coupled to the detection pin HPD of the first connector  220 . When the first connector  220  is electrically coupled to second connector  320  properly, the detection pin HPD of the first connector  220  is electrically coupled to the power supply pin VCC in a short circuit. The detection pin HPD outputs a high level signal to the input pin GPIO of the control chip  120 , the output pin BEEP of the control chip  120  outputs a low level signal to the first terminal of the electronic switch  160 , and the electronic switch  160  is turned off. The second terminal of the alarm member  180  is not electrically coupled to ground, and the alarm member  180  does not operate, indicating a proper connection between the first connector  220  and the second connector  320 . 
         [0018]    When the first connector  220  is electrically coupled to second connector  320  improperly, the detection pin HPD is disconnected from the power supply pin VCC. The detection pin HPD outputs a low level signal to the input pin GPIO of the control chip  120 , the output pin BEEP of the control chip  120  outputs a high level signal to the first terminal of the electronic switch  160 , and the electronic switch  160  is turned on. The second terminal of the alarm member  180  is electrically coupled to ground through the electronic switch  160 . The alarm member  180  operates and the buzzer B 1  sounds, to indicate an improper connection between the first connector  220  and the second connector  320 . 
         [0019]      FIG. 4  illustrates a second exemplary embodiment of a detection device  100 . A difference between the first exemplary embodiment and the second exemplary embodiment is that the alarm member  182  can comprise a light-emitting diode D 1 . The first terminal and the second terminal of the alarm member  182  correspond to a cathode and an anode of the light-emitting diode D 1 . When the alarm member  182  operates, the light-emitting diode D 1  is illuminated. 
         [0020]      FIG. 5  illustrates a third exemplary embodiment of a detection device  100 . The difference between the first exemplary embodiment and the third exemplary embodiment is that the alarm member  186  can comprise a buzzer B 3  and a light-emitting diode D 2 . The first terminal and the second terminal of the alarm member  186  correspond to a cathode of the light-emitting diode D 2  and a power supply terminal of the buzzer B 3 . An anode of the light-emitting diode D 2  is electrically coupled to a ground terminal of the buzzer B 3 . When the alarm member  186  operates, the buzzer B 3  sounds and the light-emitting diode D 2  is simultaneously illuminated. 
         [0021]    The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the details, including matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims.