CN214381141U - Control circuit and mainboard of camera device - Google Patents
Control circuit and mainboard of camera device Download PDFInfo
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- CN214381141U CN214381141U CN202120710944.3U CN202120710944U CN214381141U CN 214381141 U CN214381141 U CN 214381141U CN 202120710944 U CN202120710944 U CN 202120710944U CN 214381141 U CN214381141 U CN 214381141U
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Abstract
The application discloses camera device's control circuit and mainboard belongs to the intelligent terminal field. The control circuit of the camera device comprises a power module and a control module; the power supply module is electrically connected with the control module through the first node and is used for electrically connecting with the at least two camera devices through the first node and supplying power to the at least two camera devices; different camera devices correspond to different working voltages; and the control module is used for controlling the potential of the first node so as to control the power supply voltage of the at least two image pickup devices, and when the power supply voltage is the working voltage corresponding to any one of the at least two image pickup devices, the image pickup device works. The power module that this application embodiment can be based on a single output supplies power to different camera devices, need not to use complicated step-down unit to simplify circuit structure, reduce and walk the line degree of difficulty, reducible mainboard area that occupies simultaneously.
Description
Technical Field
The application belongs to the field of intelligent terminals, and particularly relates to a control circuit and a mainboard of a camera device.
Background
The smart terminal generally has a photographing function, such as a smart phone, and as the photographing requirement of a user increases, the photographing function of the smart phone has evolved from a basic function to a main function. In order to meet the increasingly upgraded shooting requirements of users and achieve the functions of recording basic images and shooting better scenery and portrait, a traditional camera cannot meet the requirements, camera modules with the functions of wide angle, super wide angle, depth of field, depth, telephoto lens and the like need to be added, and accordingly richer combinations of double shooting, three-shooting, four-shooting and even five-shooting occur.
The camera is very sensitive to the power supply, and the improper power supply voltage of selecting can influence the formation of image effect, and along with the increase of camera quantity, the power module who is responsible for the camera power supply on the mobile phone motherboard has met great challenge.
The existing power supply scheme of the camera is mainly realized by configuring a power module and a voltage reduction circuit with complex structures, and more peripheral devices (such as inductors) need to be matched, and the power module usually adopts multi-path output to supply power for different cameras. In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: the existing scheme has more devices, increases the wiring difficulty, has larger occupied area of the mainboard, and is not beneficial to heat dissipation of the mainboard and preparation of ultrathin equipment (such as ultrathin mobile phones, flat plates and the like).
SUMMERY OF THE UTILITY MODEL
The purpose of the embodiment of the application is to provide a control circuit and a mainboard of a camera device, which can solve the technical problems that the existing camera supply scheme is complex in structure, the wiring difficulty is high and the occupied area of the mainboard is large.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a control circuit of an image pickup apparatus, including: the device comprises a power supply module and a control module;
the power supply module is electrically connected with the control module through a first node, is used for being electrically connected with the at least two camera devices through the first node and supplies power to the at least two camera devices; different camera devices correspond to different working voltages;
and the control module is used for controlling the potential of the first node so as to control the power supply voltage of the at least two image pickup devices, and when the power supply voltage is the working voltage corresponding to any one of the at least two image pickup devices, the image pickup device works.
In a second aspect, an embodiment of the present application provides a motherboard applied to an electronic device, where the motherboard includes: the control circuit comprises a main control module, at least two camera devices and the control circuit of the camera device provided by the first aspect of the embodiment of the application;
the main control module and the at least two camera devices are electrically connected with a control circuit of the camera device.
The technical scheme of the embodiment of the application can at least realize the following beneficial effects:
in the embodiment of the application, a power module with single-path output is combined with a control module to supply power to different camera devices, and the control module can adjust the power supply voltage by controlling the potential of a first node to enable the power supply voltage to be the working voltage of different camera devices, so that the corresponding camera devices work, and the switching of different camera devices is realized; the above technical scheme of this application embodiment simple structure can reduce and walk the line degree of difficulty, and reducible mainboard area that occupies simultaneously is favorable to the mainboard heat dissipation and prepares ultra-thin electronic equipment.
Drawings
Fig. 1 is a schematic structural diagram of a control circuit of an image pickup apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic structural framework diagram of another control circuit of the image pickup apparatus provided in the embodiment of the present application;
fig. 3 is a schematic circuit diagram of an alternative implementation of a control circuit of an image pickup apparatus according to an embodiment of the present application;
fig. 4 is a circuit of another alternative implementation of the control circuit of the image pickup apparatus provided in the embodiment of the present application.
In the figure:
110 is a power module, 120 is a control module, 130 is an output module, 140 is a first decoupling module, and 150 is a second decoupling module;
121 is a first control unit, 122 is a second control unit, and 123 is a third control unit.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship. In the description of the present application, "a plurality" means two or more unless otherwise specified.
The following provides embodiments of the present application through specific embodiments and application scenarios thereof with reference to the accompanying drawingsElectric camera device Control circuit and mainboard of deviceThe detailed description is given.
An embodiment of the present application provides a control circuit of an image pickup apparatus, as shown in fig. 1, the control circuit includes: a power module 110 and a control module 120.
The power module 110 is electrically connected with the control module 120 through a first node M, and is used for being electrically connected with the at least two camera devices through the first node M to supply power to the at least two camera devices; different image pickup devices correspond to different operating voltages.
And a control module 120, configured to control a potential of the first node M to control a supply voltage of the at least two image capturing devices, where when the supply voltage is an operating voltage corresponding to any one of the at least two image capturing devices, the image capturing device operates.
In the embodiment of the application, a power module with single-path output is combined with a control module to supply power to different camera devices, and the control module can adjust the power supply voltage by controlling the potential of a first node to enable the power supply voltage to be the working voltage of different camera devices, so that the corresponding camera devices work, and the switching of different camera devices is realized; the above technical scheme of this application embodiment simple structure can reduce and walk the line degree of difficulty, and reducible mainboard area that occupies simultaneously is favorable to the mainboard heat dissipation and prepares ultra-thin electronic equipment.
In an alternative embodiment, the power module 110 may be a single-output power chip, such as a Low Dropout Regulator (LDO) power chip.
In an alternative embodiment, the first signal input of the power module 110 may be connected to a fixed feedback reference voltage.
In an alternative embodiment, referring to the structural framework diagram of the control circuit shown in fig. 2, at least two control terminals of the control module 120 are configured to be electrically connected to the main control module, a first terminal of the control module 120 is electrically connected to the first node M, and a second terminal of the control module 120 is electrically connected to the first signal input terminal of the power module 110.
The control module 120 is configured to: any control terminal receives a first control signal (for example, any one of CAM1_ DVDD _ EN to CAMN _ DVDD _ EN in fig. 2) output by the main control module, and controls the potential of the first node M according to the first control signal, so that the supply voltage provided by the first node M is the working voltage of one image pickup device corresponding to the control terminal.
In an alternative embodiment, referring to the circuit schematic of the control circuit shown in fig. 3 or fig. 4, the control module 120 includes: a first control unit 121, a second control unit 122 and at least two third control units 123;
a first end of the first control unit 121, a first end of the second control unit 122, and a first end of the third control unit 123 are electrically connected to the first signal input terminal ADJ of the power module 110; a second terminal of the first control unit 121 is electrically connected to the first node M, and a second terminal of the second control unit 122 is grounded; a second end of the third control unit 123 is used as a control end of the control module 120, and is electrically connected to the main control module.
The third control unit 123 may receive any one of the first control signals output by the main control module, for example, any one of the following first control signals in fig. 3 or fig. 4: any one of the first control signal CAM1_ DVDD _ EN for the image pickup device 1, the first control signal CAM2_ DVDD _ EN for the image pickup device 2, and the first control signal CAM3_ DVDD _ EN for the image pickup device 3.
The first node M may provide any one of the following supply voltages: a power supply voltage CAM1_ DVDD of the image pickup device 1, a power supply voltage CAM2_ DVDD of the image pickup device 2, and a power supply voltage CAM3_ DVDD of the image pickup device 3.
It should be noted that fig. 3 and fig. 4 in the present application use the case of three image capturing devices as an example, and do not constitute a limitation to the embodiment of the present application, and those skilled in the art can understand that the control circuit of the image capturing device provided in the embodiment of the present application can also be applied to the case of two image capturing devices or more than four image capturing devices, so as to satisfy more application scenarios, which are not listed here.
In an alternative embodiment, referring to the circuit schematic of the control circuit shown in fig. 3 or fig. 4, the first control unit 121 in the embodiment of the present application may include a first impedance subunit, and the second control unit 122 includes a second impedance subunit.
The first end of the first impedance subunit and the first end of the second impedance subunit are both electrically connected to the first signal input terminal ADJ of the power supply module 110; the second terminal of the first impedance subunit is electrically connected to the first node M, and the second terminal of the second impedance subunit is Grounded (GND).
The first impedance subunit and the second impedance subunit may each comprise at least one resistor. In one example, referring to the circuit schematic shown in fig. 3 or 4, the first impedance subunit may include a resistor R1, and the second impedance subunit may include a resistor R2; in another example, the first impedance subunit and the second impedance subunit may include more than two resistors connected in series or in parallel, and two ends of the series structure or the parallel structure are respectively used as a first end and a second end of the first impedance subunit or the second impedance subunit to be connected with the corresponding ports.
In one example, the resistor R1 and the resistor R2 in the embodiment of the present application may be K-ohm (i.e., kilo-ohm) chip resistors.
In an alternative implementation, referring to the circuit schematic diagram of the control circuit shown in fig. 3, the third control unit 123 in the embodiment of the present application may include: a third impedance subunit. The first terminal of the third impedance subunit is electrically connected to the first signal input terminal ADJ of the power supply module 110, and the second terminal is used for electrically connecting to a main control module (the module is not shown in fig. 3).
The control circuit of the image pickup apparatus shown in fig. 3 can realize the following adjustments: when the main control module is pulled down to the ground, the output first control signal is at a low level, the third impedance subunit is grounded, the resistance of the whole control module 120 can be changed, and further the potential of the first node M can be adjusted, so that the power supply voltage provided by the first node M can meet the power supply requirement of the corresponding camera device.
In another alternative implementation, referring to the circuit schematic diagram of the control circuit shown in fig. 4, the third control unit 123 in the embodiment of the present application includes: a third impedance subunit and a switch subunit; the first end of the third impedance subunit is electrically connected to the first signal input end of the power module 110, and the second end of the third impedance subunit is electrically connected to the first end of the switch subunit; the control end of the switch subunit is used for being electrically connected with the main control module, and the second end of the switch subunit is grounded.
The control circuit as shown in fig. 4 can achieve the following adjustments: the conduction of the switch subunit can be controlled by the first control signal, so as to control the grounding condition of the third impedance subunit, the grounding condition of the third impedance subunit can change the resistance value of the whole control module 120, and further the potential of the first node M can be adjusted, so that the power supply voltage provided by the first node M can meet the power supply requirement of the corresponding camera device.
In one example, referring to fig. 3 or 4, each third impedance subunit in the embodiment of the present application may include at least one resistor, for example, resistors R3, R4, and R5 shown in fig. 3 or 4, and resistors R3, R4, and R5 may be K-level ohmic chip resistors.
When the third impedance subunit comprises a resistor, two ends of the resistor are respectively used as a first end and a second end of the third impedance subunit; when the third impedance subunit includes more than two resistors, the resistors are connected in series or in parallel, and two ends of the obtained series structure or parallel structure are respectively used as the first end and the second end of the third impedance subunit.
In an alternative embodiment, the switch subunit may include a switch Transistor, such as Q1 in fig. 4, the switch Transistor may be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a triode, or another type of Transistor that can implement a switching function, the MOSFET may be an N-MOSFET (N-channel-Metal-Oxide-Semiconductor Field-Effect Transistor) such as shown in fig. 4, the drain of the N-MOSFET is a first terminal of the switch subunit, the source is a second terminal of the switch subunit, and the gate is a control terminal of the switch subunit; in other examples, the MOSFET may also be a P-MOSFET (P-channel-metal-oxide-semiconductor field effect transistor), and the connection is adjusted based on the performance of the P-MOSFET.
In an optional implementation manner, referring to a circuit schematic diagram of a control circuit shown in fig. 3 or fig. 4, the control circuit of the image capturing apparatus provided in the embodiment of the present application may further include: at least two output modules 130, wherein the impedance value of the output modules 130 is smaller than a preset impedance threshold value; the output terminals VOUT of the power supply module 110 are electrically connected to at least two image pickup devices (the image pickup devices are not shown in fig. 3 and 4) through at least two output modules 130, respectively.
In one example, each output module 130 may include at least one resistor, such as resistors R6, R7, and R8 shown in fig. 3 or fig. 4, and the preset impedance threshold may be set according to actual requirements. In one example, the resistors R6, R7, and R8 may be 0 ohm chip resistors, and a crossover may be implemented to meet wiring requirements.
In an example, referring to the circuit schematic diagram of the control circuit shown in fig. 3 or fig. 4, the second signal input terminal EN of the power supply module 110 is configured to be electrically connected to the main control module and receive a second control signal LDO EN output by the main control module; the second control signal LDO EN is used to control the power module 110 to enter or exit the operating state according to the input.
In one example, referring to a circuit schematic diagram of a control circuit shown in fig. 3 or 4, the control circuit of the image pickup apparatus provided in the embodiment of the present application may further include: a first decoupling module 140 and a second decoupling module 150. The first decoupling module 140 is electrically connected to a power input VIN of the power module 110, and the second decoupling module 150 is electrically connected to a BIAS voltage input BIAS of the power module 110.
Referring to the example of fig. 3 or 4, the first and second decoupling modules 140 and 150 are also grounded.
The first decoupling module 140 may remove an influence of the high frequency signal on a power supply voltage provided to the power supply module 110, and the second decoupling module 150 may remove an influence of the high frequency signal on a bias voltage VCC (supply voltage of the circuit) provided to the power supply module 110.
In an example, referring to the circuit schematic diagram of the control circuit shown in fig. 3 or fig. 4, the first decoupling module 140 may include at least one first capacitor C1, and the second decoupling module 160 may include at least one second capacitor C2 (fig. 3 and fig. 4 only show one capacitor C1 and one capacitor C2 as examples), when there are more than two first capacitors C1 or second capacitors C2, each first capacitor C1 or each second capacitor C2 may be connected in series or in parallel, and the specific connection manner may be set according to actual parameter requirements. The first capacitor C1 and the second capacitor C2 may each be a decoupling ceramic capacitor.
The following describes an operation principle of another control circuit of the image capturing apparatus according to the embodiment of the present application, taking the circuit shown in fig. 3 as an example:
the second control signal LDO _ EN in fig. 3 is used as an operation enable signal of the power module 110, and can control the power module 110 to enter an operating state, for example, when the image pickup apparatus connected to the power module 110 needs to operate, the second control signal LDO _ EN output by the main control module is at a first level, for example, 1.8V (volts), and at this time, the power module 110 performs the operating state.
Assume that power is currently required to be supplied to three cameras, and that the three cameras do not operate simultaneously.
When the image pickup apparatus 1 needs to operate, the signal CAM1_ DVDD _ EN output by the master module is at the second level (lower than the first level, for example, 0V), and the signals CAM2_ DVDD _ EN and CAM3_ DVDD _ EN output by the master module are both at the first level.
When the second level is 0V, the resistor R3 in the corresponding one of the third control units 123 is connected to ground, the resistor R2 in the third control unit 123 and the resistor R3 in the third control unit 123 are connected to ground in parallel, and the resistance of the equivalent resistor is:
r2 xr 3/(R2+ R3) expression (1)
At this time, the equivalent resistor R is connected in series with the resistor R1 in the first control unit 121 to form a new voltage dividing structure, and the power module 110 can output the following voltage through the output terminal VOUT:
in the expression (2), VfA fixed feedback reference voltage, for example 0.5V, is connected to the first signal input ADJ.
Substituting the equivalent resistance R obtained by the expression (1) into the expression (2) can obtain the output voltage V of the power module 110OUTAs the power supply voltage CAM1_ DVDD of the image pickup apparatus 1.
When the image pickup apparatus 2 needs to operate, the signal CAM2_ DVDD _ EN output by the master module is at the second level (lower than the first level, for example, 0V), and the signals CAM1_ DVDD _ EN and CAM3_ DVDD _ EN output by the master module are both at the first level.
When the second level is 0V, the resistor R4 in the corresponding one of the third control units 123 is connected to ground, the resistors R2 and R4 in the third control unit 123 are connected to ground in parallel, and the equivalent resistance values thereof can be calculated by referring to the foregoing expression (1), and R3 in the expression (1) can be replaced by R4.
At this time, the equivalent resistor R is connected in series with another resistor R1 in the first control unit 121 to form a new voltage dividing structure, and the power module 110 can output the voltage V through the output terminal VOUTOUTAs the power supply voltage CAM2_ DVDD of the image pickup apparatus 2, the expression (1) after the replacement and the preceding expression (2) may be referred to for the calculation of the output voltage.
When the image pickup apparatus 3 needs to operate, the signal CAM3_ DVDD _ EN output by the master module is at the second level (lower than the first level, for example, 0V), and the signals CAM1_ DVDD _ EN and CAM2_ DVDD _ EN output by the master module are both at the first level.
When the second level is 0V, the resistor R5 in the corresponding one of the third control units 123 is connected to ground, the resistors R2 and R5 in the second control unit 122 are connected to ground in parallel, and the equivalent resistance values thereof can be calculated by referring to the foregoing expression (1), and R3 in the expression (1) can be replaced by R5.
At this time, the equivalent resistor R is connected in series with the resistor R1 in the first control unit 121 to form a new voltage dividing structure, and the power module 110 can output the voltage V through the output terminal VOUTOUTAs the power supply voltage CAM3_ DVDD of the image pickup device 3, the calculation of the output voltage can refer to the foregoing expression (1) and expression (2).
The following describes an operation principle of another control circuit of the image pickup apparatus according to the embodiment of the present application, taking the circuit shown in fig. 4 as an example:
the second control signal LDO _ EN in fig. 4 is used as an operation enable signal of the power module 110, and can control the power module 110 to enter an operating state, for example, when the image pickup apparatus connected to the power module 110 needs to operate, the second control signal LDO _ EN output by the main control module is at a first level, for example, 1.8V (volts), and at this time, the power module 110 performs the operating state.
Assume that power is currently required to be supplied to three cameras, and that the three cameras do not operate simultaneously.
When the image pickup apparatus 1 needs to operate, the signal CAM1_ DVDD _ EN (as a first control signal) output by the master block is at a first level (e.g., 1.8V), and the signals CAM2_ DVDD _ EN and CAM3_ DVDD _ EN (both at a second level) output by the master block.
The switch transistor Q1 in the corresponding one of the third control units 123 is turned on, the resistor R3 in the first control unit 121 is turned on with the ground, the resistor R2 in the second control unit 122 and the resistor R3 in the first control unit 121 are connected in parallel to the ground, and the resistance value of the equivalent resistor thereof can be calculated with reference to the foregoing expression (1).
At this time, the equivalent resistor R is connected in series with the resistor R1 in the first control unit 121 to form a new voltage dividing structure, the power module 110 can output a voltage through the output terminal VOUT as the supply voltage CAM1_ DVDD of the image pickup apparatus 1, and the calculation of the output voltage can refer to the foregoing expressions (1) and (2).
When the image pickup apparatus 2 needs to operate, the signal CAM2_ DVDD _ EN output by the master module is at a first level (e.g., 1.8V), and the signals CAM1_ DVDD _ EN and CAM3_ DVDD _ EN output by the master module are both at a second level.
The switch transistor Q2 in the corresponding one of the third control units 123 is turned on, the resistor R4 in the third control unit 123 is turned on with the ground, the voltage dividing resistor R2 in the second control unit 122 and the resistor R4 in the third control unit 123 are connected in parallel to the ground, the resistance value of the equivalent resistor can be calculated by referring to the expression (1) above, and R3 in the expression (1) can be replaced by R4.
At this time, the equivalent resistor R is connected in series with the resistor R1 in the first control unit 121 to form a new voltage dividing structure, the power module 110 can output a voltage through the output terminal VOUT as the supply voltage CAM2_ DVDD of the image pickup device 2, and the calculation of the output voltage can refer to the expression (1) after the replacement and the expression (2) before.
When the image pickup apparatus 3 needs to operate, the signal CAM3_ DVDD _ EN output by the master module is at a first level (e.g., 1.8V), and the signals CAM1_ DVDD _ EN and CAM2_ DVDD _ EN output by the master module are both at a second level.
The switch transistor Q3 in the corresponding one of the third control units 123 is turned on, the resistor R5 in the third control unit 123 is turned on with the ground, the resistor R2 in the second control unit 122 and the resistor R5 in the third control unit 123 are connected in parallel to the ground, and the resistance value of the equivalent resistor can be calculated by referring to the expression (1) above, and R3 in the expression (1) can be replaced by R5.
At this time, the equivalent resistor R is connected in series with the resistor R1 in the first control unit 121 to form a new voltage dividing structure, the power module 110 can output a voltage through the output terminal VOUT as the supply voltage CAM3_ DVDD of the image pickup device 3, and the calculation of the output voltage can refer to the expression (1) after the replacement and the expression (2) before.
Based on the above time-sharing and multi-output principle corresponding to fig. 3 and fig. 4, the control circuit of the image pickup apparatus provided in the embodiment of the present application may adopt a power module with single output to implement multi-output, specifically, according to different configured image pickup apparatuses, the required power supply voltages are different, and different output voltages may be obtained by adjusting the impedance values of three impedance sub-units in the circuit, so as to supply power to a plurality of image pickup apparatuses, meet the power supply requirements of different image pickup apparatuses, and do not need to use a power module with multi-output and a complex voltage reduction circuit, thereby simplifying the circuit structure, reducing the wiring difficulty, and simultaneously reducing the occupied area of the motherboard, and being beneficial to heat dissipation of the motherboard and preparation of ultra-thin terminal equipment, such as ultra-thin mobile phones, tablet computers, and the like.
As shown in fig. 4, the control circuit can be adapted to more types and models of the main control module, such as some low-cost main control modules, based on the control manner of the main control module outputting the enable signal for controlling the on-state of the switching transistor in the third control unit 123, so as to reduce the cost.
It should be noted that the circuit structures shown in fig. 3 and fig. 4 of the present application are only examples, and do not limit the embodiments of the present application. The control circuit of the image pickup apparatus provided in the embodiment of the present application may also have other circuit structures, for example, the first decoupling module 140 and the second decoupling module 150 may be removed from the circuit structure shown in fig. 3 or fig. 4; as another example, the output module 130 can be eliminated from the circuit structure shown in fig. 3 or fig. 4, which is not listed here.
Based on the same inventive concept, the embodiment of the present application further provides a motherboard, which can be applied to an electronic device, and the motherboard includes: the camera comprises a main control module, at least two camera devices and a control circuit of the camera device provided by the embodiment of the application; the main control module and the at least two camera devices are electrically connected with the control circuit.
In an example, the main control module may be an SoC (System on Chip) or an MCU (micro controller Unit), or may be another Chip capable of implementing the functions of the main control module in the embodiments of the present application.
In one example, the master control module may output the first control signal and the second control signal, for example, the previous first level and the second level, and when outputting the second level of 0V, the master control module may implement the output of the second level of 0V by pulling down the internal to the ground.
In one example, a General Purpose Input/Output (GPIO) port may be disposed on the main control module, and both the first control signal and the second control signal may be Output through the GPIO port.
In one example, the camera device according to the embodiment of the present application may be any one of a front camera, a rear camera, and a rear wide-angle camera, and may also be other camera devices not listed, and different camera devices may be different types of cameras to meet different shooting requirements.
Referring to the foregoing, the control circuit of the image pickup apparatus in the embodiment of the present application reduces the wiring difficulty of the layout on the motherboard, thereby also reducing the influence on other key signal lines on the motherboard, facilitating the protection of the heat dissipation of other key signal lines and the motherboard, and maintaining the stability of the overall performance of the motherboard.
Referring to the foregoing, the main board provided in the embodiment of the present application may use a single-output power module and a simple control module to supply power to multiple image capturing devices, so that the structure is simplified to reduce the standby time of the main board; in addition, when power is supplied to the plurality of image pickup devices, the plurality of image pickup devices do not normally operate at the same time, and when one image pickup device operates, the other image pickup devices are in a shutdown state, and a voltage output to the shutdown image pickup device is blocked by the shutdown image pickup device, so that leakage current is not caused.
The technical scheme provided by the embodiment of the application has a wide application range, can be applied to application scenes of multiple camera devices, and can be applied to voltage requirements of modules which do not work simultaneously on all consumer electronic equipment.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A control circuit of an image pickup apparatus, comprising: the device comprises a power supply module and a control module;
the power supply module is electrically connected with the control module through a first node, is used for being electrically connected with the at least two camera devices through the first node and supplies power to the at least two camera devices; different image pickup devices correspond to different working voltages;
the control module is configured to control a potential of the first node to control a supply voltage of the at least two image capturing devices, and when the supply voltage is a working voltage corresponding to any one of the at least two image capturing devices, the image capturing device works.
2. The control circuit of the image pickup apparatus according to claim 1, wherein at least two control terminals of the control module are electrically connected to a main control module, a first terminal of the control module is electrically connected to the first node, and a second terminal of the control module is electrically connected to a first signal input terminal of the power supply module;
the control module is used for: and receiving a first control signal output by the main control module through any one of the control terminals, and controlling the potential of the first node according to the first control signal to enable the power supply voltage to be the working voltage of one camera device corresponding to the control terminal.
3. The control circuit of the image pickup apparatus according to claim 2, wherein the control module includes: a first control unit, a second control unit and at least two third control units;
the first end of the first control unit, the first end of the second control unit and the first end of the third control unit are electrically connected with the first signal input end of the power supply module;
a second end of the first control unit is electrically connected with the first node, and a second end of the second control unit is grounded;
and the second end of the third control unit is used as the control end of the control module and is electrically connected with the main control module.
4. The control circuit of the image pickup apparatus according to claim 3, wherein the first control unit includes a first impedance subunit, and the second control unit includes a second impedance subunit;
the first end of the first impedance subunit and the first end of the second impedance subunit are both electrically connected with the first signal input end of the power supply module;
the second end of the first impedance subunit is electrically connected with the first node, and the second end of the second impedance subunit is grounded.
5. The control circuit of the image pickup apparatus according to claim 3, wherein said third control unit includes: a third impedance subunit;
the first end of the third impedance subunit is electrically connected with the first signal input end of the power supply module;
and the second end of the third impedance subunit is used for being electrically connected with the main control module.
6. The control circuit of the image pickup apparatus according to claim 3, wherein said third control unit includes: a third impedance subunit and a switch subunit;
the first end of the third impedance subunit is electrically connected with the first signal input end of the power supply module, and the second end of the third impedance subunit is electrically connected with the first end of the switch subunit;
the control end of the switch subunit is used for being electrically connected with the main control module, and the second end of the switch subunit is grounded.
7. The control circuit of the image pickup apparatus according to any one of claims 1 to 6, further comprising: the impedance value of the output modules is smaller than a preset impedance threshold value;
the output end of the power supply module is electrically connected with the at least two camera devices through the at least two output modules respectively.
8. The control circuit of the image pickup apparatus according to any one of claims 1 to 6, wherein the second signal input terminal of the power supply module is configured to be electrically connected to a main control module, and receive a second control signal output by the main control module;
the second control signal is used for controlling the power supply module to enter or exit a working state.
9. The control circuit of the image pickup apparatus according to any one of claims 1 to 6, further comprising: a first decoupling module and a second decoupling module;
the first decoupling module is electrically connected with a power input end of the power supply module, and the second decoupling module is electrically connected with a bias voltage input end of the power supply module.
10. A motherboard applied to an electronic device, comprising: a control circuit of a master control module, at least two camera devices and a camera device according to any one of claims 1-9;
the main control module and the at least two camera devices are electrically connected with the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120710944.3U CN214381141U (en) | 2021-04-07 | 2021-04-07 | Control circuit and mainboard of camera device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120710944.3U CN214381141U (en) | 2021-04-07 | 2021-04-07 | Control circuit and mainboard of camera device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214381141U true CN214381141U (en) | 2021-10-08 |
Family
ID=77974433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120710944.3U Active CN214381141U (en) | 2021-04-07 | 2021-04-07 | Control circuit and mainboard of camera device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214381141U (en) |
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2021
- 2021-04-07 CN CN202120710944.3U patent/CN214381141U/en active Active
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