Patent Publication Number: US-2017366746-A1

Title: Peripheral equipment for controlling camera arranged in a terminal, system and method thereof

Description:
RELATED APPLICATIONS 
     The present application is a continuation-in-part of U.S. patent application Ser. No. 14/247,773, titled “Peripheral Equipment for Controlling Camera arranged in a terminal, System and Method Thereof” filed on Apr. 8, 2014, which claims priority to Chinese Patent Application No. 201310136358.2, titled “Photo Taking System for Controlling Camera arranged in a terminal through Peripheral Equipment, Method and Device thereof” filed on Apr. 18, 2013 with the State Intellectual Property Office of the People&#39;s Republic of China, Chinese Patent Application No. 201310217058.7, titled “Peripheral Equipment for Controlling Camera arranged in a terminal, System and Method Thereof” filed on Jun. 3, 2013 with the State Intellectual Property Office of the People&#39;s Republic of China, and the present application is also a continuation-in-part of the co-pending U.S. application Ser. No. 14/174,945, titled “Peripheral Equipment for Controlling Camera arranged in a terminal, System and Method Thereof” filed on Feb. 7, 2014, and all of which are fully incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The invention relates to portable electronic equipment, and in particular relates to peripheral equipment for controlling a camera arranged in a terminal, a system and a method thereof. 
     BACKGROUND 
     With the development of science and technology, mobile terminals as the most widely used terminals have been integrated into people&#39;s life. In addition to the basic call function, mobile terminals have various functions of mobile-computer type, particularly personal information management, and browser and e-mail functions based on wireless data communication. Mobile terminals provide users with enough screen size and bandwidth, thereby being convenient to carry around and also providing a broad stage for software running and content services, so that many value added services can be developed thereon, such as stocks, news, weather, transportation, commodities, application program downloading and music and picture downloading. 
     People can have overall business and entertainment experiences without carrying more electronic devices just because of the integration of the mobile terminal functions, for example, the music playing function of a mobile terminal can replace that of an MP3, the photo taking function of the mobile terminal can replace that of a camera, etc. Furthermore, with the development of the mobile technology, various mobile terminal manufactures are also continuously upgrading hardware configuration of mobile terminals, therefore, the functionality and practicality of the mobile terminals are greatly improved. 
     Currently, photo taking by mobile terminal has been widely utilized; however, mobile terminals have various size dimensions, and especially those with relatively large sizes are not favorable for the photo taking operation of users. Meanwhile, the battery capacity may not meet the application requirements of mobile terminal. It may lead to emergency call or operation is interrupted when the battery capacity alarms. And the mobile terminal equipped with the LED may not achieve effective lighting because of limits of the arm length and the degree of freedom, such as in the nooks and crannies sheltered with the articles. Therefore, these have become urgent problems that mobile terminals with relatively large sizes are unfavorable for the photo taking operation of users, providing backup power to the mobile terminal, and solving the effective lighting limited by arm length and the degree of freedom to some extent. 
     SUMMARY 
     (I) Technical Problem to be Solved 
     The technical problem to be solved by the invention is to provide peripheral equipment for controlling a camera arranged in a terminal, a system and a method thereof, in order to solve the problems that existing mobile terminals with relatively large sizes are unfavorable for photo taking operation of users, providing backup power to the mobile terminal, and solving the effective lighting limited by arm length and the degree of freedom to some extent. 
     (II) Technical Solution 
     To solve the above technical problem, the invention provides a camera controlling apparatus, comprising: a telescopic support rod, the telescopic support rod having a hollow body and an electrical signal generator disposed inside; a terminal clamp, for holding a mobile device designed for a lightning earphone, mounted on the telescopic support rod; a trigger device, mounted on the telescopic support rod and connected to the electrical signal generator; and a lightning cable disposed inside and extending through the hollow body of the telescopic support rod, the cable having a first end for connecting to the mobile device held by the terminal clamp and a second end connected to the telescopic support rod, and for transmitting a digital control signal to the mobile device through the lightning cable, wherein the electrical signal generator includes a lightning audio module and an input pin connected to the trigger device, the lightning audio module communicates with the mobile device through the lightning cable, wherein the trigger device is a reset key, the reset key controls the digital control signal for controlling the camera mounted on the mobile device, wherein the reset key is pressed, the digital control signal changes from a low level to a high level. 
     On the other hand, the invention also provides a camera controlling apparatus, comprising: a telescopic support rod, the telescopic support rod having a hollow body and an electrical signal generator disposed inside; a terminal clamp, for holding a mobile device, mounted on the telescopic support rod; a digital signal processor and a microphone, wherein the microphone obtains audio data including human speech, and the digital signal processor utilizes Automatic Speech Recognition to receive a command from a user and generate a digital control signal accordingly. 
     On the third hand, the invention also provides a camera controlling apparatus, comprising: a telescopic support rod, the telescopic support rod having a hollow body and an electrical signal generator disposed inside; a terminal clamp, for holding a mobile device, mounted on the telescopic support rod; a bluetooth remote controller, for establishing the paired bluetooth connection with the mobile device, wherein the bluetooth remote controller includes a button, if the button is pressed, a digital control signal is generated and transmitted to the mobile device, for controlling the camera mounted on the mobile device. 
     (III) Beneficial Effects 
     Compared with the prior art, the photo taking system and the method for controlling the camera arranged in a terminal through the peripheral equipment, and the equipment achieve the following effects: 
     1. by adopting the technical solution of the invention, the problem that mobile terminals with relatively large sizes are unfavorable for photo taking operation of users is effectively solved; and
 
2. by adopting the technical solution of the invention, advanced ways of photo taking can be implemented, such as key control photo taking, sound control photo taking, face control photo taking, somatosensory control photo taking, rotary control photo taking, remote control photo taking, photosensitive control photo taking and eyeball recognition control photo taking, and the photo taking pleasure is effectively enhanced.
 
3. by adopting the technical solution of the invention, backup power for the mobile terminal can be provided.
 
4. by adopting the technical solution of the invention, the effective lighting limited by arm length and the degree of freedom can be solved to some extent.
 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a structural block diagram of the system for controlling a camera arranged in a terminal through peripheral equipment of the first embodiment of the invention; 
         FIG. 2  is a structural schematic diagram of an external controller and a transmission device of the second embodiment of the invention; 
         FIG. 3 a    is schematic diagram of voltage values generated by the control analog signals of the second embodiment of the invention; 
         FIG. 3 b    is a waveform schematic diagram of practical button operation electrical signal; 
         FIG. 4 a    is a front view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal of the third embodiment of the invention; 
         FIG. 4 b    is a right view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal of the third embodiment of the invention; 
         FIG. 4 c    is a schematic view of the peripheral equipment for controlling the camera arranged in a terminal in the third embodiment of the invention, after the terminal is fixed on the peripheral equipment; 
         FIG. 4 d    is a front view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal in another implementing way in the third embodiment of the invention; 
         FIG. 4 e    is a left view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal in another implementing way in the third embodiment of the invention; 
         FIG. 4 f    is a rear view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal in another implementing way in the third embodiment of the invention; 
         FIG. 5  is a schematic functional block diagram of the charging power control module in one embodiment of the invention; 
         FIG. 6  is a flow diagram of a method for controlling a camera arranged in a terminal through peripheral equipment in embodiments of the invention; 
         FIG. 7 a    is a circuit schematic diagram of an output indication unit in one embodiment of the invention; 
         FIG. 7 b    is a schematic diagram of an access circuit of a sound sensor (MIC Sensor) in one embodiment of the invention; 
         FIG. 7 c    is a schematic diagram of combinational connection of circuits in various units in one implementing way of the invention; 
         FIG. 7 d    is a schematic diagram of combinational connection of circuits in various units in another implementing way of the invention; 
         FIG. 7 e    is a schematic diagram of combinational connection of circuits in various units in yet another implementing way of the invention; 
         FIG. 7 f    is a waveform schematic diagram of an input signal in the implementing way of  FIG. 6   e;    
         FIG. 8  is a schematic diagram of a standard curve of normal distribution; 
         FIG. 9  is a front view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal in another implementing way in one embodiment of the invention; 
         FIG. 10  is a structural block diagram of the system for controlling a camera arranged in a terminal through peripheral equipment of one embodiment of the invention; 
         FIG. 11  is a structural block diagram of the system for controlling a camera arranged in a terminal through peripheral equipment of another embodiment of the invention; and 
         FIG. 12  is a flow diagram of a method for controlling a camera arranged in a terminal through peripheral equipment in embodiments of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     If certain terms are used in the description or in the claims to indicate a specific component, it is to be understood by those skilled in the art that hardware manufacturers may use different nouns to define the same component. In the description and the claims, name differences are not used to distinguish components, but instead, functional differences of the components are a criterion for distinction. The terms “including”, “includes”, and so on, mentioned throughout the description and the claims is an open-type wording, it should be interpreted as “including but not limited to”. The wording “a/an” does not exclude plurality. The term “substantially” means within an acceptable error range, and those skilled in the art can solve the technical problem within a certain error range, and substantially achieve the technical effects. In addition, the term “couple” herein includes any direct and indirect electrically connecting means. Therefore, if it is described that a first device is coupled to a second device, it represents that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device by other device or connecting means. Subsequently described in the description are preferred implementing ways for carrying out the invention; however, such description is made for the purpose of explaining general principles of the invention, instead of limiting the scope of the invention. The protection scope of the invention should accord with what is defined in the appended claims. 
     The invention is further described in details in conjunction with the accompanying drawings, however, the description is not a limitation of the invention. 
     First Embodiment 
     In the technical solution of the invention, to provide convenient and quick operation means of photo taking and the effective lighting mode, the first problem to be solved is that the existing terminals lack effective external control equipment, and to this end, in one embodiment of the invention, peripheral equipment for controlling a camera arranged in a terminal is provided, and the peripheral equipment is used for generating an effective operation signal and transmitting the signal to the terminal. It is to be understood by persons of relevant skill in the art that the signal generated by the peripheral equipment is described to be used for controlling the camera or LED of the terminal in the first embodiment, but in practical situations, the peripheral equipment is only used for providing assistance for user operation, and the function of the signal generated by the equipment is ultimately determined by the terminal, and in addition to controlling the camera or LED, the signal obviously can also be used for controlling other functions of the terminal, such as controlling music playing, controlling user interface operation or controlling game pictures. Therefore, controlling the camera or LED should not be understood as the only defining of the technical problem to be solved by the peripheral equipment of the invention. 
     Specifically, as shown in  FIG. 1 , in a preferred embodiment of the invention, the peripheral equipment  11  for controlling the camera arranged in a terminal comprises at least one external controller  101  and at least one transmission device  102 , wherein the at least one external controller  101  comprises a user operation end and a trigger signal generator, the user operation end receives an operation action of a user, and the trigger signal generator generates a regular trigger event signal according to the operation action; and the at least one transmission device  102  comprises an interface interacting with the terminal, and transmits the trigger event signal to the terminal through a transmission medium. 
     Furthermore, in a more preferred embodiment of the invention, a system  10  for controlling a camera arranged in a terminal through peripheral equipment comprises the peripheral equipment  11  as described above and a terminal  12  provided with the camera, wherein, the terminal  12  may be a mobile terminal, a tablet computer or any portable electronic device, which is not defined herein. The terminal  12  comprises a receiving device  103  and a processing device  104 , wherein the receiving device  103  comprises an interface interacting with the peripheral equipment, receives a trigger event signal sent by the peripheral equipment, converts the signal into a control digital signal and then sends the control digital signal to the processing device; and the processing device  104  is coupled with the receiving device, and receives the control digital signal sent by the receiving device to adjust the camera of the terminal. Furthermore, the LED of the terminal can also be adjusted according to the received control digital signal. 
     In the embodiment, the external controller  101  receives the input of the operation action of the user by the user operation end, the user operation end can be a key, a handle, a somatosensory controller or a touch pad, or a combination thereof. A control analog signal could be generated through keystroke action trigger, somatosensory/gravity sensory trigger or wireless signal trigger (correspondingly, the keystroke action trigger can achieve button control photo taking; the somatosensory/gravity sensory trigger can achieve somatosensory control photo taking, rotary control photo taking, or brain wave, eye movement, virtual key control photo taking and so on; and the wireless signal trigger can achieve sound control photo taking and remote control photo taking); and the control analog signal can be transmitted in a wired way (e.g., via an earphone cable or a USB cable etc.), and can also be transmitted in a wireless way (e.g., via infrared, bluetooth or WIFI etc.), and what is described above is not defined herein. Of course, in other preferred implementing ways, the invention can also adopt an optical device to send a face image, a limb movement image, an eyeball movement image of the user or other optical signals to the terminal which is used for controlling as the trigger event signal, or a touchpad sends a signal to the terminal which is generated from user click or gesture operation and etc., thereby achieving respective control way. 
     In the embodiment, the interface of the transmission device  102  can be an earphone connector, a USB interface, a power connector, an infrared component, a bluetooth component, a WIFI component, an RF (Radio Frequency) component, a speaker, an optical unit, or a gravity sensory component (for example, means of transmitting gravity adjustment operation on rotation, acceleration etc. of the terminal to the terminal through a contact point) and the like, which is not limited herein. 
     In the embodiment, the receiving device  103  can be arranged inside the terminal, and converts the control analog signal into a digital signal which can be identified by the terminal. 
     In the embodiment, the processing device  104  can be a processing chip of the terminal, and it can generate various control analog signals according to the received digital signal in order to control the camera or LED of the terminal to be subjected to different adjustments, for example, for the camera: single photo taking, continuous photo taking and/or video photo taking and so on; for the LED: turning on, turning off and interval flashing and so on. This is not defined herein. As previously described, the control function of the signal is ultimately determined by the terminal, and in addition to controlling the camera or LED, obviously the signal can also be used for controlling other functions of the terminal, such as controlling music playing, controlling user interface operation or controlling game pictures, which are all depending upon the actual output of the processing device and should not be understood herein as limitation of the invention. 
     Correspondingly, in the embodiment, as shown in  FIG. 6 , a method for controlling the terminal through the peripheral equipment is as follows: 
     step A, the peripheral equipment generates the first trigger event signal or the second trigger event signal according to an operation action of the user;
 
step B, the peripheral equipment transmits the first trigger event signal or the second trigger event signal to the terminal;
 
step C, the terminal converts the first trigger event signal or the second trigger event signal into the first control digital signal or the second control digital signal; and
 
step D, the terminal adjusts the camera according to the first control digital signal, and adjusts the LED according to the second control digital signal.
 
     Second Embodiment 
     The embodiment involves description of particular implementation of the peripheral equipment of the invention, that is, the at least one external controller  101  can be arranged in a hand-held controller, the at least one external controller  101  is provided with a reset key, and the existence of the control analog signal is controlled through an on-off action of the reset key (when the key is pressed, the control analog signal disappears; and when the key is released, the control analog signal is recovered). The control analog signal can be a complex time sequence signal (such as, a signal at a certain frequency), a simple RC delay trigger signal or the simplest high and low level switching signal. 
     The at least one transmission device  102  can be an earphone cable (as shown in  FIG. 2 ), with one end having an earphone connector passing through a transmission hole of a connecting rod  3  and being connected with an earphone interface of the terminal, and with the other end being connected with the external controller  101 . The earphone plug comprises an MIC port (microphone, i.e. sound input channel) and a GND port (ground terminal) (correspondingly, the earphone jack of the terminal also comprises an MIC and a GND), and the MIC and GND ports are connected to two pins of the reset key in the external controller  101 , with a resistor and a capacitor connected in parallel at the same time. Thus, when the reset key is pressed, the MIC port is shorted to the ground terminal, and the control analog signal disappears; and after the key is released, the voltage of the control analog signal is recovered to the original level state. 
     The receiving device  103  is arranged inside the terminal, and identifies whether there is signal voltage changing resulting from the pressing of the key. In normal conditions (as shown in  FIG. 3 a   ), the level of the control analog signal is maintained at around 2V, and when the reset key is pressed, the control analog signal is immediately changed to a low level, which continues until the pressed key is released. After the reset key is released, the level is gradually recovered to a high level of around 2V. It is to be noted that the problem of vibration during press exists in practical button operation (as shown in  FIG. 3 b   ), and the control analog signal is closer to the waveform of the schematic diagram in  FIG. 3 b    below: repeated jump may exist in the pressing and releasing processes, for example, during t 0  and t 2 , a stable low level t 1  will be maintained after pressing. In normal conditions, the time of t 0  and t 2  can be less than 50 ms, and t 1  may be kept for more than hundreds of milliseconds. Therefore, the receiving device  103  adopts a common simple noise filter method to filter vibration, in order to obtain a determined keystroke action. The receiving device  103  converts a voltage change signal generated from the keystroke action into a digital signal that can be identified by the processing device  104 . 
     After the receiving device confirms a button signal input, more trigger events can be defined accordingly. For example, in the first mode, a single keystroke in is means taking photo; multiple keystrokes in is means entering mode setting; and in the mode setting, a plurality of input control events can be further achieved according to the number of keystrokes and the time intervals. In the second mode, two keystrokes in 0.5 s means entering mode switching of LED control function, it can be switched between the basic mode and encoding mode. Wherein, in the basic mode, each keystroke turns the LED on or off; in the encoding mode, encoded signal can be edited on the terminal (such as the on or off duration of the LED, and cycle parameter and so on), and each keystroke makes the encoding send or stop, to achieve interval flashing, and the function similar to the Morse Code and so on. 
     The processing device  104  is a terminal processing chip, which receives the digital signal sent by the receiving device  103 , and further controls the camera of the terminal to complete camera actions in the first mode, such as single photo taking, continuous photo taking and/or video photo taking; and further controls the LED of the terminal to complete LED actions in the second mode, such as turning on, turning off and interval flashing and so on. 
     The control input can be achieved in many feasible ways, and earphone jack input is only a simple implementing example. In addition to the above technical solution, another way can be adopted as follows: a bluetooth module is mounted at a handle end, and mobile phone bluetooth is used to achieve both-way communication; or the handle is directly rotated without any external circuit, and a gravity sensor of the mobile phone is used to sense the rotation, thereby obtaining the input control signal. Sound control photo taking can also be achieved in the invention, the external controller  101  is internally provided with an audio signal transmitting circuit for transmitting audio signals at different frequencies, and signals are output by a miniature speaker to a microphone (MIC) of the terminal, so that the terminal records the audio signals at different frequencies to generate different control functions. 
     Third Embodiment 
     Further as shown in  FIGS. 4 a  and 4 b   , just take earphone cable transmission as an example, the overall structure of the peripheral equipment for controlling the camera arranged in a terminal also comprises a support rod  1 , a terminal clamp  3  and an action trigger control device  2 , a lower-part rod body of the support rod  1  is a handle, an upper-part rod body thereof is provided with a telescopic structure, and the upper end of the support rod is connected with the terminal clamp  3 ; the terminal clamp  3  is provided with an upper fixing arm and a lower fixing arm, with the distance therebetween being adjustable for clamping and fixing terminals with different sizes; and the action trigger control device  2  (i.e. the external controller) can generate the control analog signal from keystroke action trigger, gravity sensory trigger and/or wireless signal trigger. 
     Preferably, the support rod  1  is provided with a universal ball joint  111  which is arranged at the upper end of the support rod  1 , and the universal ball joint  111  and the support rod  1  form an integral structure; of course, the universal ball joint  111  can also be fixed to the support rod  1  in welding manner, or a ball seat is arranged at the upper end port of the support rod  1 , the universal ball joint  111  is fixed to the ball seat in clamping manner, and the connecting structure of the universal ball joint  111  is not defined herein. Of course, the support rod and the terminal clamp can also adopt other direct fixed connection and flexible connection structures in the prior art. 
     The function of the terminal clamp is to adaptively fix terminals with different sizes to the support rod, and generally a size adjusting and clamp fixing mechanism needs to be arranged. This is not defined in the invention, and those skilled in the art can choose an appropriate structure in the prior art optionally. In the embodiment, the terminal clamp  3  is composed of a fixing plate  301  with adjustable distance from top end to bottom end, and fixing arms  302  and  303  at both upper and lower ends, and can enclose a clamping space for accommodating a mobile terminal, wherein the fixing plate  301  and the fixing arms at both ends thereof form an integral structure, and the fixing plate  301  and the fixing arms  302  and  303  can be, but not limited to, in the common geometrical shapes of squares, rectangles, polygons and so on; the front end face of the fixing plate  301 , the lower end face of the upper fixing arm  302  and the upper end face of the lower fixing arm  303  are all provided with backing plates; the lower end face of the lower fixing arm  303  is provided with a ball seat  305 , which is in sleeve connection with the universal ball joint  111  at the upper end of the support rod  1 , thus achieving the adjustment at any angle or direction; and the front side of the lower fixing arm  303  is provided with a convex lens  304 , so as to facilitate self photo taking by users. The handle at the lower part of the support rod can also be provided with a plurality of stripes, to increase the friction when being held by the user. 
     The action trigger control device can be one or more control keys, gravity sensors and/or wireless signal receivers, and preferably, in the embodiment, the action trigger control device is a button (an implementing way of the user operation end) arranged on the handle. 
     In the embodiment, as shown in  FIG. 4 c   , specifically, the terminal can operate in the camera function (the first mode) and the LED control function (the second mode), when the terminal operates in the first mode, the peripheral equipment generates the first trigger event signal to adjust the camera of the terminal according to an operation action of the user. For example, the first trigger event signal can include when the button  2  completes the first keystroke, if the second keystroke action does not occur in 1 s, then the terminal enters a single photo taking mode for photo taking; when the button  2  completes the first keystroke, if the second keystroke action occurs in 1 s, then the terminal enters a continuous photo taking mode, preferably the continuous photo taking mode is three continuous photo taking mode; after the button  2  enters the continuous photo taking mode, when the first keystroke action is completed, if the second keystroke action does not occur in 1 s, then the terminal takes photos in the continuous photo taking mode; after the button  2  enters the continuous photo taking mode, if two times of keystroke actions occur in 1 s, then the terminal switches from the continuous photo taking mode back to the single photo taking mode. When the terminal operates in the second mode, the peripheral equipment generates the second trigger event signal to adjust the LED of the terminal according to an operation action of the user. For example, the second trigger event signal can include when the button  2  completes the first keystroke, if the second keystroke action does not occur in 0.5 s, then the terminal controls the LED correspondingly in the current mode. Specifically, if the current mode is the basic mode, then the terminal controls the LED to turn on or off; if the current mode is the encoding mode, then the terminal makes the encoding send or stop, to achieve interval flashing, and the function similar to the Morse Code and so on; when the button  2  completes the first keystroke, if the second keystroke action occurs in 0.5 s, then the terminal enters mode switching of LED control function, it can be switched in the current mode. Specifically, if the current mode is the basic mode, it can be switched to the encoding mode, if the current mode is the encoding mode, it can be switched to the basic mode. of course, the button  2  can also adopt a multifunctional key structure, that is, the button  2  can generate different control analog signals when being pressed toward different directions, and what is described above is not defined herein. 
     In the embodiment, the backing plate is a backing plate made of sponge, foam or other soft materials, which is not specifically defined herein. 
     In the embodiment, the lens surface of the convex lens  304  faces toward the user to facilitate self photo taking by users. 
     In the embodiment, the earphone cable can be an elastic spiral line, provided with an earphone plug at one end connected with the terminal, and the other end of the earphone cable passes through the interior of the support rod  1  and is connected to the button  2 , which is not specifically defined herein. 
       FIG. 5  shows a schematic functional block diagram of the charging power control module in one embodiment of the invention. The support comprises charging power control module. Wherein, power unit  501  provides power for the terminal. The power unit  501  can be lithium battery, which is not specifically defined herein. The power management unit  502  coupled with the power unit  501  manages charging and discharging for the power unit  501 . 
     The power management unit  502  can be a open common circuit of the industry to control charging and discharging for one or two lithium batteries, which is not specifically defined herein. The external power unit  503  coupled with the power management unit  502  charges for the power unit  501 . The adapter connector of the external power unit  503  can use USB, MicroUSB or MiniUSB interface structure, and it also can directly use the earphone to be the charging interface (in this case it needs to provide special charging adapter to convert earphone interface to USB interface). The terminal charging unit  504  coupled with the power management unit  502  charges for the terminal. The adapter connector of the terminal charging unit  504  depends on the terminal type. Specifically, the charging interface of terminal with the Android operating system is usually MicroUSB, the charging interface of terminal with the IOS operating system is the Lightning Spin interface. 
     The handle which is hollow inside is preferably provided with a power box for accommodating a battery, which is not specifically defined herein. 
     In the embodiment, the support rod  1  has a bent structure at the upper end rod body, with a bending angle adapted to the adjustment of the universal ball joint  111 , which is not specifically defined herein. 
     In the embodiment, after the universal ball joint  111  and the ball seat  305  are connected in a sleeved manner, they can also be screwed and fixed through a screw cap  306 , which is not specifically defined herein. 
       FIGS. 4 d , 4 e  and 4 f    provide another implementing way of the overall structure of the peripheral equipment, the main body structure thereof is similar to that in  FIGS. 4 a  and 4 b   , and only some distinctive features in the figures are listed exemplarily herein for description, which is not a specific definition of the implementing way of the overall structure herein. 
     In the implementing way, to increase the friction when the terminal is clamped, convex stripes are formed on the contact surfaces of the fixing arms  302  and  303  with the terminal. Furthermore, certain protrusions (dot-shaped in  FIG. 4 d   ) can be formed on the contact surface of the fixing plate  301  with the terminal to increase the friction or avoid the damage to the terminal surface. In  FIGS. 4 d , 4 e  and 4 f   , as the screw cap  306  is already screwed and fixed, the universal ball joint and the ball seat cannot be seen in the figures any longer; and to facilitate the user self photo taking by using the camera at the back of the terminal, the convex lens  304  is arranged at the back of the fixing plate  301  in the implementing way. 
     In addition, unlike in  FIGS. 4 a  and 4 b   , when the earphone plug  307  is not connected to the terminal (i.e. the interface of the transmission device interacting with the terminal) on the earphone cable in  FIGS. 4 d , 4 e  and 4 f   , it is plugged at one side of the fixing plate  301  (plugged at the upper end of the support rod in  FIGS. 4 a  and 4 b   ), and the method prevents the earphone cable and the plug from swaying or being pulled when not being used. 
     Fourth Embodiment 
     Subsequently, some more preferred circuit implementing ways of the invention are described below. The system of the invention also comprises an output indication unit for indicating the photo taking condition, and the output indication unit performs corresponding output indication in a perceivable way of user, according to a signal for adjusting the camera of the terminal by the processing device. 
     As shown in  FIG. 7 a   , two LEDs (Light Emitting Diodes) are adopted for a blinking prompt of the output condition in one embodiment of the invention. An MCU (Micro Control Unit) uses two GPIO (General Purpose Input Output) pins to control the LEDs: when an led 1  pin is at a low level, an MOST transistor is turned on, and an LED 1  lights up; otherwise the MOS 1  transistor is turned off, and the LED 1  does not light up; and when an led 2  pin (for clear illustration in  FIG. 7 , the led 2  pin is not directly connected with the input of the LED 2 , but in fact the output of the led 2  pin is connected with the input end of LED 2  directly) is at a low level, an MOS 2  transistor is turned on, and an LED 2  lights up; otherwise the MOS 2  transistor is turned off, and the LED 2  does not light up. The two light emitting diodes (LED 1 , LED 2 ) can be respectively mounted at the front side and the rear side of the terminal clamp, so that no matter the user uses a front camera or a rear camera of the mobile phone for self photo taking, there is one LED lamp that can be used. The MCU collects an L/R (left/right channel) or MIC pin signal to obtain an LED blinking mode. A mobile phone L/R can only output an audio signal, and a built-in analog-digital converter of the MCU is used in the circuit to sample and analyze the frequency of the signal input by the L/R, so that the corresponding control condition is obtained. For example, in single photo taking, an audio signal at 1 Khz is input and lasts for 50 ms; and the LED lamp blinks once (e.g., lighting for 1 s) following the photo taking shutter action. In three continuous photo taking, an audio signal at 2 Khz is input and lasts for 50 ms; and the LED lamp blinks slowly in the preparation period and blinks quickly following the shutter action in three continuous photo taking period (e.g., lighting for 500 ms every other 1 s and lasting for 5 s in the preparation period; and blinking for three times in is following the shutter action in the continuous photo taking period). In video recording, an audio signal at 4 Khz is input and lasts for 50 ms; and the LED lamp blinks slowly (e.g., lighting for 500 ms every other 2 s). 
     Alternatively, the MCU can directly collect an operation action of the user, to obtain the control condition corresponding to the LED blinking. In addition, the invention can further combine a shaking device of the terminal to indicate the output condition, for example, when single photo taking is conducted, the device shakes once (e.g., shakes for 500 ms) following the photo taking shutter action; in three continuous photo taking, the device does not shake in the preparation period and shakes following the shutter action in the three continuous photo taking period; and in video recording, the device shakes once in start-up, and shakes once when the video photo taking is stopped, and so on, which is not specifically defined herein. 
     In the way of adopting the earphone cable, if the earphone jack of the terminal is adopted for input and output control, in general conditions the terminal usually cannot use a built-in MIC for sound recording due to the plugging of the earphone connector. Under this circumstance, a sound signal can be input through an MIC pin of the earphone connector, and a sound sensor can be used in the terminal or the peripheral equipment, and generally, a relatively excellent sound recording effect can be achieved by using any kind of MEMS MIC sensor. 
     As shown in  FIG. 7 b   , usually the MIC pin of the terminal has a bias voltage of around 2V, which is used to provide an operating voltage for the MIC Sensor. In operation, a sound recording output of the MIC Sensor is coupled to an MIC signal through a capacitor C and, and hence an input audio signal will be superimposed on the 2V bias voltage of the MIC pin of the terminal. 
       FIG. 7 c    shows usage of a 4-pole connector for an earphone for controlling a camera. The 4-pole includes a L (left channel), R (right channel), GND (ground), and MIC (microphone) as shown in  FIG. 7 c   .  FIG. 7 c    also shows a combinational connecting way of a plurality of circuits when earphone cable input control is adopted: the keystroke action is directly sent to the terminal MIC, and also transmitted to the MCU at the same time as control conditions of LED blinking; and in video and sound recording, the output of the MIC Sensor is also directly coupled to the MIC pin. In this case, the particular implementing way of the key is as follows: The two ends of mic and gnd terminals of the earphone interface are directly connected to two pins of the reset key, with a resistor (and optionally a capacitor, not shown in the figure) connected in parallel at the same time, so that when the key is pressed, the mic is shorted to the ground, and after the key is released, the voltage is recovered to the original level state. 
       FIG. 7 d    shows another combinational connecting way of circuits, and in this way, a keystroke control signal (button) is firstly transmitted to the MCU, and after the signal is identified by the MCU, a control signal is then transmitted to the MIC pin of the terminal; and in video and sound recording, the output of the MIC Sensor is also directly coupled to the MIC pin. 
     In such a circuit condition, the MCU can generate a special control signal to the terminal, thereby simplifying the processing work inside the terminal. For example, the MCU can generate audio signals at different frequencies to the MIC pin of the terminal according to different conditions; and at the terminal side, input control information can be obtained merely by inputting an audio signal and taking simple analysis. 
       FIG. 7 e    further gives a circuit implementing way without adopting the MCU, and in this way, the keystroke control signal is directly transmitted to the MIC pin of the terminal; in video and sound recording, the output of the MIC Sensor is also directly coupled to the MIC pin; and the LED indicating function does not need to be achieved by MCU, and it is directly controlled by an L/R channel signal of the terminal. As shown in  FIG. 7 f   , the terminal can respectively output sine wave signals at the same frequency but in opposite phases at the L and R channels (illustrated with square waves in the figure), and generally the peak-to-peak values on the L and R channels can reach +/−0.7 v to +/−1.0 v (illustrated with +/−1.0 v in the figure). However, the conduction tube voltage drop of a light emitting diode is about 1.2 v, and in normal conditions a single channel (R or L) can not light up an LED. If L and R output signals in opposite phases, then at the moment of t 0 , the voltage difference Vr-l between R and L is 2.0 v, and the LED 1  in the circuit can be turned on; at the moment of t 1 , the voltage difference Vl-r between L and R is 2.0 v, and the LED 2  can be turned on; and likewise, at the moment of t 2 , the LED 1  is turned on. This is repeated such that when the terminal outputs such kind of waveform, an LED can be lighted up; and when the terminal does not output the waveform, the LEDs are not lighted up, and thus different modes of LED blinking can be generated. 
     Fifth Embodiment 
     In the present embodiment, the specific processing process of the photo taking method of the invention is described exemplarily. In the process, the terminal performs photo taking and setting through monitoring signals transmitted from the mic input pin: in the terminal system, a thread will be started, specially used for capturing signals transmitted from the mic input pin, and once a signal is incoming, the system will trigger an event and report it to the process. After capturing the event, the process will analyze the incoming signal. Several signal patterns can be appointed in advance to represent different operations, and the signal patterns can be signals at different frequencies and with the same duration, can also be signals with different durations and at the same frequencies, and can also be other defined signal patterns. According to a predefined strategy, the system adopts different analytic algorithms to analyze the signals: for example, if signals at different frequencies and with the same duration are adopted, the frequencies of the signals will be analyzed; if signals with different durations and at the same frequencies are adopted, the durations of the signal will be analyzed; and if fixed waveform signals are adopted, the waveform of the signals will be analyzed. After the signals are successfully analyzed, the result will be transmitted to a control unit (such as a processing device) of the terminal, and after obtaining a control command, the control unit will perform corresponding operation on the camera. For example, if as appointed in advance, a signal of 2 KHZ represents photo taking, and a signal of 4 KHZ represents single photo taking/continuous photo taking mode conversion, then when learning a signal of 2 KHZ through analyzing the signal frequency, the system will send a control command of photo taking to the control unit. After obtaining the control command of photo taking, the control unit can let the camera perform photo taking. Therefore, the invention achieves the object that the user can complete the photo taking action without operating the terminal directly. 
     In addition, photo taking and setting can be achieved through terminal rotation. Likewise, a thread is started for monitoring the current terminal state; when the terminal rotates, a built-in gyroscope of the terminal will report the rotation state of the terminal to the process; and after capturing the terminal rotation event, the process analyzes the terminal rotation event. Different rotation states are appointed in advance to represent different operation modes, for example, the terminal rotating to the left at an angle larger than 30 degrees and turning back represents photo taking. Thus after the user rotates the terminal to the left at an angle larger than 30 degrees and turns it back, the system will capture the event and send a photo taking command to the control unit, and after obtaining the control command of photo taking, the control unit can let the camera perform photo taking. 
     The principle of controlling photo taking in a wireless way such as bluetooth, WIFI and infrared is the same as that in the case of the earphone cable, except that signals will not be transmitted through the mic input pin of the earphone hole, but transmitted in wireless ways. At present the system only needs to obtain the command data transmitted in the wireless way for analysis, and if the control strategy is predefined, the system transmits the command to the control unit for operation. Otherwise, no operation is performed. 
     After photo taking is completed, the system can also process photos according to preset special effect, for example, perform face buffing and whitening processing. In a preferred embodiment of the invention, the system uses an opencv framework to process photos through Gaussian Blur Algorithm. The blur degree is defined according to a grade set by the user to achieve the buffing and beautifying effects. 
     In this case, Gaussian Blur is a kind of image blur filter, which calculates transformation of each pixel in an image using normal distribution. In an N-dimension space, the normal distribution equation is 
     
       
         
           
             
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             wherein r is a blur radius (r 2 =u 2 +v 2 ), and σ is a standard deviation of the normal distribution. In the two-dimension space, the contours of the curved surface generated by the formula are concentric circles with a normal distribution from the center point. A convolution matrix composed of pixels which are non-zero in the distribution is transformed to the original image. The value of each pixel is set to a weighted average of the values of surrounding adjacent pixels. The value of the original pixel has the highest Gaussian value, and thus receives the greatest weight, and neighboring pixels receive smaller weights as their distance to the original pixel increases. 
           
         
       
    
     The standard curve of normal distribution is as shown in  FIG. 8 , and in this figure, normal distribution is a bell-shaped curve; the closer to the center, the bigger the value is; and the further to the center, the smaller the value is. In calculating the average, it only needs to set the “center point” as the original point, and distribute weights to other points according to their positions on the normal curve to obtain a weighted average; and weighted average calculation is performed on all the pixels to obtain an image processed by Gaussian Blur. 
     In addition, panoramic mosaic of a plurality of photos can also be achieved in the invention, and the simple processing procedure during mosaic is as follows: 
     1) picture selection: the overlapping area of two pictures should not be too small, accounting for at least not smaller than 15%, so as to ensure enough corner matching;
 
2) corner detection: many methods are provided in OpenCV in the step, such as Harris corner detection, with detected corners stored in a CvSeq doubly linked list;
 
3) corner purification and conversion: a function FindHomography built in OpenCV is used for RANSAC purification, and a 3.times.3 conversion matrix is calculated, which is a perspective transformation matrix, and an image processed by the perspective transformation can be directly used for mosaic;
 
4) image mosaic: it needs to call the createDefault function to generate default parameters, and then use the stitch function to perform mosaic; and
 
5) spherical transformation: a coordinate system is converted from plane coordinates to spherical coordinates, to accomplish panoramic mosaic at 360 degrees.
 
     Likewise, filter effects can also be achieved in the invention. A plurality of filter effects built in a graphic processing software are used to perform special processing on the photos, the filter effects are as freezing special effect, fusion casting effect, series pictures effect, diffusing and beautifying effect, attendance edge special effect, feature special effect, zoom blur, LOMO special effect, movie special effect, inverse color effect and the like. 
       FIG. 9   [i1]  is a front view of the overall structural appearance of the peripheral equipment for controlling the camera arranged in a terminal in another implementing way in one embodiment of the invention. The peripheral equipment of  FIG. 9  is similar to the peripheral equipment of  FIG. 4 d   , except for a lightning cable  901 . Lightning is a proprietary computer bus and power connector created by Apple Inc. Introduced on Sep. 12, 2012, to replace the 30-pin dock connector, the Lightning cable is used to connect Apple mobile devices like iPhones, iPads, and iPods to host computers, external monitors, cameras, USB battery chargers, and other peripherals. 
     For Apple iPhone7 or iPhone7 Plus, Apple needs more space for things like taptic engines and dual-lens cameras, and needs to get rid of the 3.5 mm earphone jack for something more versatile, like the Lightning port (e.g., Lightning earphone). In this case, the peripheral equipment of  FIG. 4 d    may be not suitable for Apple iPhone7 or iPhone7 Plus. In  FIG. 9 , the peripheral equipment can include the fixing plate  301 , the fixing arms  302  and  303 , the screw cap  306 , and the lightning cable  901 . The peripheral equipment can include a telescopic support rod (such as a handle) having a hollow body and an electrical signal generator disposed inside; a terminal clamp for holding a mobile device designed for a lightning earphone (such as iPhone7), mounted on the telescopic support rod; a trigger device (such as a button) mounted on the telescopic support rod and connected to the electrical signal generator. The lightning cable  901  is disposed inside and extending through the hollow body of the telescopic support rod. The lightning cable  901  has a first end for connecting to the mobile device (such as iPhone7) held by the terminal clamp, and a second end connected to the telescopic support rod, and for transmitting a digital control signal to the mobile device through the lightning cable  901 . In one embodiment, the trigger device is a reset key. The reset key controls the digital control signal for controlling the camera mounted on the mobile device. If the reset key is pressed, the digital control signal can change from a low level (e.g., 0) to a high level (e.g., 1), which continues until the reset key is released, and after the reset key is released, the control signal returns to the low level. In another embodiment, if the reset key is pressed, the digital control signal can change from a high level (e.g., 1) to a low level (e.g., 0), which continues until the reset key is released, and after the reset key is released, the control signal returns to the high level. 
       FIG. 10  is a structural block diagram of the system for controlling a camera arranged in a terminal through peripheral equipment of one embodiment of the invention. Description is given below in combination with  FIG. 9 . In  FIG. 10 , a lightning connector  1010  of a mobile device (such as iPhone7) is connected to a peripheral equipment  1020  through a lightning cable (such as the lightning cable  901 ). The lightning connector  1010  can include a lightning audio module (LAM), having LAM POWER, LAM D+/D−, LAM DW, LAM GND, GND, USB D+/D−, DEVICE POWER ports. The peripheral equipment  1020  can include a LAM  1022  and a trigger device  1024 . The peripheral equipment  1020  can also include a lightning cable (not labeled). The LAM of the lightning connector  1010  of the mobile device can communication with the LAM  1022  through the lightning cable. The data communication can adopt UART transmission protocol. The LAM  1022  can further include three input pins S 0 -S 2 , one of which can be connected to the trigger device  1024 . 
     In one embodiment, the trigger device is a reset key. The reset key controls the digital control signal for controlling the camera mounted on the mobile device. If the reset key is pressed, the digital control signal can change from a low level (e.g., 0) to a high level (e.g., 1), which continues until the reset key is released, and after the reset key is released, the control signal returns to the low level. Input S 0 /S 0 /S 1  detects the level change of the digital control signal, then the LAM  1022  communicates with the lightning connector  1010  about the operation action from the user (e.g., press the button). Based on the operation action received, the mobile device can take photo accordingly. For example, if the user presses the button once, the mobile device can perform a single photo taking. If the user presses the button twice in a short time, the mobile device can perform a continuous photo taking. For example, after the first press action, if the second press action does not occur in 1 s, then the mobile device enters a single photo taking mode. If the second press action occurs in 1 s, then the mobile device enters a continuous photo taking mode, preferably the continuous photo taking mode is three continuous photo taking mode. If the user continuously presses the button over a time period (e.g., 1.5 s), the mobile device can perform a video recording and enters a video recording mode. 
       FIG. 11  is a structural block diagram of the system for controlling a camera arranged in a terminal through peripheral equipment of another embodiment of the invention. Description is given below in combination with  FIG. 9  and  FIG. 10 . In  FIG. 11 , the peripheral equipment  1020  can further include a digital signal processor (DSP)  1102  and a microphone  1104 . 
     In one embodiment, the microphone  1104  can obtain audio data including human speech. For example, the microphone  1104  can receive sound waves from a user and converts the sound wave into a raw electrical acoustical signal. The DSP  1102  utilizes Automatic Speech Recognition (ASR) to receive commands from the user in order to perform some action (e.g., take photos). For example, the DSP  1102  can recognize the context of the speech and determine whether it matches the preset command (e.g., single/continuous/video) or not. The DSP  1102  can further include a feature extraction unit to extract the acoustic feature or feature vector and determine whether the speech is from the specific user or not. In one embodiment, if the context of the speech matches the preset command (e.g., single/continuous/video) and the speech is from the specific user, then the command is transmit to the lightning connector  1010  of the mobile device through the lightning cable and the mobile device takes photo/video accordingly. 
     In one embodiment, the speech context recognition and the feature extraction can be accomplished with Gaussian Mixture Model-Universal Background Model (GMM-UBM), Hidden Markov Model (HMM), Probabilistic Linear Discriminant Analysis (PLDA), etc. 
     In one embodiment, the peripheral equipment  1020  can further include an earphone jack (not shown), such as the 3.5 mm earphone jack. The users can utilize the 3.5 mm earphone connected to the earphone jack. In such way, the user can listen to the music or talk on the phone while taking the photos (e.g., selfie photo). 
       FIG. 12  is a flow diagram of a method for controlling a camera arranged in a terminal through peripheral equipment in embodiments of the invention. Description is given below in combination with  FIG. 9  to  FIG. 11 . The method of  FIG. 12  is as follows: 
     Step  1202 : The microphone of the peripheral equipment obtains audio data including human speech. 
     Step  1204 : The processor determines whether there is a need to build or update an Automatic Speech Recognition (ASR) database. If there is no ASR database, the method goes to step  1206 . If there is the existing database, the method goes to step  1212 . 
     Step  1206 : The user starts to train commands, e.g., on the APP installed on the mobile device. For example, the user repeats the commands (e.g., single/continuous/video) two or three times. 
     Step  1208 : The processor extracts the feature of the command, e.g., the vocal print related to the specific user. 
     Step  1210 : The extracted feature of the command is stored or updated. 
     Step  1212 : The DSP recognizes the context of the speech and/or extracts the acoustic feature or feature vector. The speech context recognition and the feature extraction can be accomplished with Gaussian Mixture Model-Universal Background Model (GMM-UBM), Hidden Markov Model (HMM), Probabilistic Linear Discriminant Analysis (PLDA), etc. 
     Step  1214 : The DSP  1102  determines whether it matches the preset command (e.g., single/continuous/video) or not and/or whether the speech is from the specific user or not. In one embodiment, if the context of the speech matches the preset command (e.g., single/continuous/video) and the speech is from the specific user, then the command is transmit to the lightning connector  1010  of the mobile device through the lightning cable and the mobile device takes photo/video accordingly (step  1216 ). 
     Please note that, although  FIGS. 9-12  shows that the digital control signal can be transmitted in a wired way (e.g., via an lightning cable), it can also be transmitted in a wireless way (e.g., via bluetooth or voice). In one embodiment, the DSP  1102  and a microphone  1104  can be used singly or in combination. For example, the digital control signal can be transmitted via bluetooth. More specifically, the peripheral equipment do not include the plug  307  or the lightning cable  901 . Instead of the keystroke action trigger (e.g., button) as shown, the peripheral equipment can include a microphone and a processor to accomplish the Automatic Speech Recognition (ASR), using the voice command to take photos. The ASR operation can be similar to the description of  FIG. 11 . 
     The peripheral equipment can also include a bluetooth remote controller to establish the paired bluetooth connection with the mobile device, using the bluetooth command to take photos. In one embodiment, the bluetooth remote controller is fixed on the peripheral equipment. In another embodiment, the bluetooth remote controller can be detachable from the peripheral equipment. For example, the user can use the left hand to hold the peripheral equipment and the right hold to press the bluetooth remote controller. In one embodiment, the bluetooth remote controller can include a button. Once the user presses the button, the electrical signal generator generates an electrical trigger signal and transmits the trigger signal to the mobile device. In such way, the user can take photo wirelessly. 
     In the above description, a plurality of preferred embodiments of the invention are illustrated and described, and as described above, it is to be understood that the invention is not limited to the form disclosed herein and should not be considered as an exclusion of other embodiments, but can be used for various combinations, modifications and contexts, and can be altered through the above teachings or skills or knowledge of relevant art within the range of invention conception described herein. Alterations and variations made by those skilled in the art, as long as not departing from the spirit and scope of the invention, should be within the protection scope of the appended claims of the invention.