CN218603200U

CN218603200U - Lens driver circuit and lens driver of photographing apparatus

Info

Publication number: CN218603200U
Application number: CN202222347906.3U
Authority: CN
Inventors: 唐唯; 马泽锋; 赖金续
Original assignee: Shenzhen Leqi Network Technology Co Ltd
Current assignee: Shenzhen Leqi Network Technology Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2023-03-10
Anticipated expiration: 2032-09-02

Abstract

The utility model discloses a lens driver circuit and a lens driver of a camera device, wherein the lens driver circuit comprises a motor driving module, a main control circuit, a first signal interface and a second signal interface, wherein the motor driving module is used for driving a spindle motor to rotate; the main control circuit comprises a power supply input end and is electrically connected with the motor driving module and used for controlling the motor driving module to be switched on and switched off; the first signal interface comprises a first power supply end which is electrically connected with the power supply input end; the second signal interface includes a second power terminal electrically connected to the first power terminal. The utility model discloses technical scheme reduces photography equipment's power quantity, simplifies the installation of power, reduces photography equipment's weight.

Description

Lens driver circuit and lens driver of photographing apparatus

Technical Field

The utility model relates to a photography equipment technical field, in particular to camera lens driver circuit and photography equipment's camera lens driver.

Background

During shooting, a photographing apparatus (e.g., an apparatus including a video camera or a still camera) needs to adjust a focus and a focal length of a lens to be suitable for picture composition, and during shooting, the photographing apparatus generally needs to move according to the picture to be shot, and most photographing apparatuses generally have a large weight, so that it is difficult to perform zooming by rotating the lens through manual operation during shooting. At present, a commonly adopted scheme is that a lens driver for driving a lens focal ring to rotate is installed beside a lens, and zooming and focusing are realized by adjusting a focus following controller in wired or wireless connection with the lens driver.

Because the zoom adjustment and the focus adjustment of the lens of the photographing apparatus both require the lens driver to drive, and some photographing apparatuses also require the lens driver to adjust the transmittance of the filter of the lens, at least two lens drivers are usually required to be installed on the photographing apparatus, and each lens driver needs to be configured with a battery module to supply power to the lens driver, so that a plurality of battery modules are required to be installed on the photographing apparatus to respectively supply power to the plurality of lens drivers, the overall installation is more complicated, and the plurality of battery modules cause the weight of the photographing apparatus to increase, increasing the burden of a photographer.

SUMMERY OF THE UTILITY MODEL

The utility model provides a camera lens driver circuit and photography equipment's camera lens driver aims at reducing photography equipment's battery module quantity, simplifies battery module's installation, reduces photography equipment's weight.

To achieve the above object, the present invention provides a lens driver circuit, including:

the motor driving module is used for driving the spindle motor to rotate;

the main control circuit comprises a power supply input end and is electrically connected with the motor driving module and used for controlling the motor driving module to be switched on and switched off;

a first signal interface comprising a first power supply terminal electrically connected to the power supply input terminal; and

and the second signal interface comprises a second power supply end which is electrically connected with the first power supply end.

In some embodiments, the lens driver circuit further comprises a third signal interface comprising a third power supply terminal electrically connected to the first power supply terminal.

In some embodiments, the second power supply terminal is unidirectionally conducting to the first power supply terminal, and the third power supply terminal is unidirectionally conducting to the first power supply terminal.

In some embodiments, the lens driver circuit further includes a wireless transmission module, and the main control circuit is electrically connected to the wireless transmission module and configured to perform wireless signal transmission with an external device through the wireless transmission module.

In some embodiments, the lens driver circuit further includes a display module and a key module for user adjustment, and the display module and the key module are electrically connected to the main control circuit respectively.

In some embodiments, the first signal interface further comprises a first data signal terminal electrically connected to the master control circuit;

the second signal interface further comprises a second data signal end, and the second data signal end is electrically connected with the main control circuit.

In some embodiments, the main control circuit includes a processing unit, a voltage conversion unit and a power on/off unit, wherein the processing unit is electrically connected to the first data signal terminal, the second data signal terminal and the motor driving module;

the power supply control module is connected with the power supply input end, the voltage conversion unit and the switching unit, and is used for converting the voltage of the power supply input end into a voltage;

the voltage conversion unit is electrically connected with the processing unit and used for converting the voltage of the output end of the on-off unit into corresponding voltage to supply power to the processing unit.

In some embodiments, the voltage converting unit is electrically connected to the second power source terminal through a one-way conducting unit; and/or the presence of a gas in the gas,

the voltage conversion unit comprises a DC/DC conversion subunit and at least one LDO conversion subunit, one end of the DC/DC conversion subunit is electrically connected with the output end of the switching-on/off unit, the other end of the DC/DC conversion subunit is electrically connected with the input end of each LDO conversion subunit, and the processing unit is connected with the output end of one LDO conversion subunit.

In some embodiments, the main control circuit further includes a serial port conversion unit, and the second data signal terminal is connected to the processing unit through the serial port conversion unit.

In some embodiments, the main control circuit further includes a sensor unit electrically connected to the processing unit for detecting a rotation amount of the spindle motor.

The utility model discloses still provide a camera lens driver of photography equipment, including the spindle motor and the foretell camera lens driver circuit that are used for adjusting the camera lens.

The technical scheme of the lens driver circuit of the utility model adopts two signal interfaces (a first signal interface and a second signal interface), and the power ends (the first power end and the second power end) of the two signal interfaces are electrically connected with the power supply input end of the main control circuit; so, photography equipment is installing a plurality of uses the utility model discloses during the camera lens driver of camera lens driver circuit, only need one of them camera lens driver's a signal interface electricity connecting power, another signal interface links to each other through concatenating with the signal interface of all the other camera lens drivers, can realize that a power supplies unified power for a plurality of camera lens drivers, compares in current scheme, the utility model discloses camera lens driver circuit reduces photography equipment when installing a plurality of camera lens drivers, and required power quantity simplifies the installation of power, reduces photography equipment's whole weight, has alleviateed user's burden.

Drawings

Fig. 1 is a schematic diagram of a module structure in an embodiment of a lens driver circuit of the present invention;

fig. 2 is a schematic diagram of a module structure in a second embodiment of the lens driver circuit of the present invention;

fig. 3 is a schematic diagram of a module structure in a third embodiment of the lens driver circuit of the present invention;

fig. 4 is a schematic diagram of a module structure in a fourth embodiment of the lens driver circuit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a lens driver circuit, which is applied to a lens driver of photographic equipment; the camera device is, for example, a video camera, a still camera, or the like, and the lens driver is configured to drive a zoom ring, a focus ring, or a filter of a lens of the camera device to perform zoom adjustment, focus adjustment, or light transmittance adjustment on the lens of the camera device.

Referring to fig. 1, in the present embodiment, the lens driver circuit includes a motor driving module 10, a main control circuit 20, a first signal interface 30, and a second signal interface 40. Wherein:

the lens driver has a spindle motor, a driving member (e.g., a driving gear) is connected to a rotating shaft of the spindle motor, and the motor driving module 10 is configured to drive the spindle motor to rotate, so that the lens is zoom-adjusted, focus-adjusted, or transmittance-adjusted through the driving member.

The main control circuit 20 includes a power supply input terminal V for receiving an input of a voltage to provide a power supply voltage to the main control circuit 20; the main control circuit 20 is electrically connected to the motor driving module 10, and is configured to control the motor driving module 10 to open and close, and control driving parameters (for example, driving power, driving duration, and the like) of the motor driving module 10 during opening operation through the main control circuit 20, so as to control an adjustment amount of zoom adjustment, focus adjustment, or light transmittance adjustment of the spindle motor on a lens.

The first signal interface 30 comprises a first power supply terminal 31, the first power supply terminal 31 being electrically connected to the power supply input terminal V, and the second signal interface 40 comprises a second power supply terminal 41, the second power supply terminal 41 being electrically connected to the first power supply terminal 31. The lens driver may be electrically connected to a power source (e.g., a battery module, a charger, etc.) through the first signal interface 30, such that the power source provides a voltage to the power input terminal V through the first power terminal 31, and the lens driver may also be electrically connected to the power source through the second signal interface 40, such that the power source provides a voltage to the power input terminal V through the second power terminal 41; also, since the first power terminal 31 is connected to the second power terminal 41, when one of the first signal interface 30 and the second signal interface 40 is electrically connected to a power supply, the other signal interface can output a voltage to the outside to supply a voltage to other devices or other lens drivers. For example, when a plurality of lens drivers using the lens driver circuit of this embodiment are installed in a photographing apparatus, it is only necessary to electrically connect one signal interface (the first signal interface 30 or the second signal interface 40) of one (denoted as the first) lens driver to a power supply, connect another signal interface of the first lens driver to one signal interface of the second lens driver through a signal line, connect another signal interface of the second lens driver to one signal interface of the third lens driver through a signal line, and connect the lens drivers in series in this connection manner, so that power supply of the plurality of lens drivers can be completed through one power supply.

In the lens driver circuit of the present embodiment, two signal interfaces (the first signal interface 30 and the second signal interface 40) are adopted, and the power supply terminals (the first power supply terminal 31 and the second power supply terminal 41) of the two signal interfaces are electrically connected to the power supply input terminal V of the main control circuit 20; therefore, when the photographic equipment is provided with a plurality of lens drivers using the lens driver circuit of the embodiment, only one signal interface of one lens driver needs to be electrically connected with the power supply, and the other signal interface is connected with the signal interfaces of the other lens drivers in series, so that the purpose that one power supply supplies power for a plurality of lens drivers in a unified manner can be realized.

Referring to fig. 2, in the present embodiment, the lens driver circuit further includes a third signal interface 50, the third signal interface 50 includes a third power terminal 51, and the third power terminal 51 is electrically connected to the first power terminal 31. In the present embodiment, by adding the third signal interface 50, the present embodiment can also electrically connect the power supply through the third signal interface 50, and the remaining signal interfaces (the first signal interface 30 and the second signal interface 40) can be used to provide voltage to other lens drivers through the signal lines. In addition, under the condition that a plurality of lens drivers of the photographic equipment are connected in series to share one power supply, if the current power supply is insufficient in electric quantity (to be used up), a new power supply can be connected to the third signal interface 50 of one of the lens drivers, and then the power supply with insufficient electric quantity is taken down, so that the power supply of the lens drivers can be kept continuous, namely, when the power supply is replaced, the lens drivers do not need to be interrupted and restarted first, the normal shooting of the photographic equipment is not interrupted, and the power supply replacement operation is simpler and more convenient.

In some embodiments, the third signal interface 50 may be used to electrically connect a mount battery mounted on the lens driver, and the third signal interface 50 may be an interface in the form of a conductive contact to facilitate quick communication with the mount battery.

Referring to fig. 2, in the present embodiment, the second power terminal 41 is conducted to the first power terminal 31 in a single direction, and the third power terminal 51 is conducted to the first power terminal 31 in a single direction. The second power terminal 41 and the first power terminal 31 may be electrically connected through a unidirectional conducting unit D, and the third power terminal 51 and the first power terminal 31 may also be electrically connected through a unidirectional conducting unit D, wherein the unidirectional conducting unit D may be a diode or other devices or circuit units with the same function. By arranging the second power supply terminal 41 and the third power supply terminal 51 to be in one-way conduction towards the first power supply terminal 31, the first signal interface 30 and the second signal interface 40 can be respectively used for receiving voltage inputs with different magnitudes, such as the first signal interface 30 for receiving a larger voltage (e.g. 5 to 17V) input, and the second signal interface 40 for receiving a smaller voltage input (e.g. less than or equal to 5V); the third signal interface 50 may then be used as a sole electrical connection to a power supply to provide voltage to the power input interface.

Referring to fig. 3, in the present embodiment, the lens driver circuit further includes a wireless transmission module 60, and the main control circuit 20 is electrically connected to the wireless transmission module 60 and configured to perform wireless signal transmission with an external device through the wireless transmission module 60. For example, the main control circuit 20 may establish a wireless communication connection with the focus following controller through the wireless transmission module 60, so that the main control circuit 20 may send state information and data of the lens driver to the focus following controller through the wireless transmission module 60, and may also receive an adjustment signal or other control signals sent by the focus following controller through the wireless transmission module 60, so that a user may remotely control the operation of the lens driver through the focus following controller to achieve wireless focus following control.

In some embodiments, the wireless transmission module 60 may include a 2.4G wireless transmission unit 61, a radio frequency amplifier 62 and an antenna 63, wherein the main control circuit 20 is electrically connected with the 2.4G wireless transmission unit 61, the 2.4G wireless transmission unit 61 is electrically connected with the radio frequency amplifier 62, and the radio frequency amplifier 62 is electrically connected with the antenna 63. Of course, in other embodiments, the wireless transmission module 60 may also be a module of other communication technologies, such as a bluetooth communication module.

In some embodiments, the lens driver circuit further includes a display module 70 and a key module 70 for user adjustment, and the display module 70 and the key module 70 are respectively electrically connected to the main control circuit 20. The display module 70 is configured to display preset status information of the lens driver, where the display module 70 is, for example, an OLED display screen, and the preset status information may include: angle position information of the lens driver, power quantity, communication channel information, and the like. The key module 70 may include at least one function key, such as an adjustment key (up and down adjustment keys).

Referring to fig. 1 to 4, in some embodiments, the first signal interface 30 further includes a first data signal terminal 32, and the first data signal terminal 32 is electrically connected to the main control circuit 20; the second signal interface 40 further includes a second data signal terminal 42, and the second data signal terminal 42 is electrically connected to the main control circuit 20. The transmission of data signals or control signals between the main control circuit 20 and the focus controller or other lens drivers or image capturing devices can be realized through the first data signal terminal 32 or the second data signal terminal 42. For example, the first signal interface 30 of one lens driver is connected to the focus following controller through a signal line, and the second signal interface 40 is connected to the first signal interface 30 of another lens driver, so that the focus following controller can perform signal interaction with the two lens drivers through the signal line; for another example, the first signal interface 30 of a lens driver is connected to the focus following controller through a signal line, the second signal interface 40 is connected to the image pickup apparatus through a matching data line of the image pickup apparatus, and the focus following controller can control the recording start/stop signal to be sent to the apparatus through the lens driver, so as to control the recording start and stop of the image pickup apparatus.

Referring to fig. 4, in the present embodiment, the main control circuit 20 includes a processing unit 21, a voltage converting unit 23, and a power on/off unit 22; wherein:

the processing unit 21 is electrically connected to the first data signal terminal 32, the second data signal terminal 42 and the motor driving module 10; the processing unit 21 is configured to receive a data signal or a control signal input from the first data signal terminal 32 of the first signal terminal and the second data signal terminal 42 of the second signal terminal, and is configured to send the data signal or the control signal from the first data signal terminal 32 of the first signal terminal and the second data signal terminal 42 of the second signal terminal; the processing unit 21 controls the opening and closing of the motor driving module 10;

the on-off unit 22 is provided with an input end connected with the power supply input end V, an output end connected with the voltage conversion unit 23 and an on-off control end electrically connected with the processing unit 21, and the output end of the on-off unit 22 is electrically connected with the motor driving module 10; the processing unit 21 controls the on/off of the power on/off unit 22 to realize the power on/off of the lens driver; when the switching unit 22 is turned on, the output end of the switching unit 22 outputs voltage, one path of the voltage is supplied to the voltage conversion unit 23, and the other path of the voltage is supplied to the motor driving module 10;

the voltage conversion unit 23 is electrically connected to the processing unit 21, and is configured to convert the voltage at the output terminal of the power on/off unit 22 into a corresponding voltage to supply power to the processing unit 21, and to supply power to other power consuming modules (e.g., the wireless transmission module 60, the display module 70, and the key module 70).

The switching unit 22 may be a switching chip, a switching circuit, or a switching device (e.g., a switching transistor) having on and off state functions.

In some embodiments, the voltage converting unit 23 is electrically connected to the second power source terminal 41 through a one-way conducting unit D, so that the second signal interface 40 can provide a voltage to the outside through the second power source terminal 41, and the voltage output by the voltage converting unit 23 is relatively small and stable, and will not damage the external devices of the second signal interface 40.

The voltage converting unit 23 includes a DC/DC converting subunit (not shown) and at least one LDO (Low drop out Regulator) converting subunit (not shown), one end of the DC/DC converting subunit is electrically connected to the output end of the switching unit 22, the other end is electrically connected to the input end of each LDO converting subunit, the processing unit 21 is connected to the output end of one LDO converting subunit, the LDO converting subunit supplies power, and the output ends of the remaining LDO converting subunits are electrically connected to other modules (e.g., the wireless transmission module 60, the display module 70, and the key module 70) to supply power to the other modules.

In some embodiments, the main control circuit 20 further includes a serial port loading and exchanging unit 24, and the second data signal terminal 42 is connected to the processing unit 21 through the serial port loading and exchanging unit 24. In this embodiment, the first signal interface 30 and the second signal interface 40 adopt an interface with a serial port signal transmission function (for example, a type-c interface), and the first data signal terminal 32 and the second data signal terminal 42 both include a sending pin and a receiving pin.

In some embodiments, the main control circuit 20 further includes a sensor unit 25 electrically connected to the processing unit 21, the sensor unit 25 being configured to detect a rotation amount of the spindle motor. The main control circuit 20 detects the rotation amount of the spindle motor according to the sensor unit 25, and controls the on and off timing of the spindle motor to achieve precise lens adjustment. The sensor unit 25 may be a magnetic induction sensor or other type of sensor, among others.

In some embodiments, the main control circuit 20 further includes a protection circuit (not shown), and the power supply input terminal V is connected to the input terminal of the on/off unit 22 through the protection circuit, so as to ensure stable and reliable voltage input of the power supply input terminal V.

The utility model discloses still provide a camera lens driver of photography equipment, including the spindle motor that is used for adjusting the camera lens and foretell camera lens driver circuit, this camera lens driver circuit's concrete structure refers to above-mentioned embodiment, because this photography equipment's camera lens driver has adopted the whole technical scheme of all embodiments of above-mentioned camera lens driver circuit, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

What just go up be the utility model discloses a part or preferred embodiment, no matter be characters or the drawing can not consequently restrict the utility model discloses the scope of protection, all with the utility model discloses a holistic thought down, utilize the equivalent structure transform that the contents of the description and the drawing do, or direct/indirect application all includes in other relevant technical field the utility model discloses the within range of protection.

Claims

1. A lens driver circuit, comprising:

the motor driving module is used for driving the spindle motor to rotate;

2. The lens driver circuit of claim 1, further comprising a third signal interface comprising a third power supply terminal, the third power supply terminal being electrically connected to the first power supply terminal.

3. The lens driver circuit according to claim 2, wherein the second power supply terminal is unidirectionally conducted to the first power supply terminal, and the third power supply terminal is unidirectionally conducted to the first power supply terminal.

4. The lens driver circuit of claim 1, further comprising a wireless transmission module, wherein the main control circuit is electrically connected to the wireless transmission module for performing wireless signal transmission with an external device through the wireless transmission module.

5. The lens driver circuit according to claim 1, further comprising a display module and a key module for user adjustment, the display module and the key module being electrically connected to the main control circuit, respectively.

6. The lens driver circuit of claim 1, wherein the first signal interface further comprises a first data signal terminal, the first data signal terminal being electrically connected to the master control circuit;

7. The lens driver circuit of claim 6, wherein the main control circuit comprises a processing unit, a voltage conversion unit and a power on/off unit, and the processing unit is electrically connected to the first data signal terminal, the second data signal terminal and the motor driving module;

the power supply control module is electrically connected with the power supply input end, the voltage conversion unit and the switching unit;

8. The lens driver circuit according to claim 7, wherein the voltage converting unit is electrically connected to the second power source terminal through a unidirectional conducting unit; and/or the presence of a gas in the gas,

9. The lens driver circuit according to claim 7, wherein the main control circuit further comprises a serial port conversion unit, and the second data signal terminal is connected to the processing unit via the serial port conversion unit.

10. The lens driver circuit of claim 7, wherein the main control circuit further comprises a sensor unit electrically connected to the processing unit for detecting a rotation amount of the spindle motor.

11. A lens driver of a photographing apparatus including a spindle motor for adjusting a lens, characterized by further comprising the lens driver circuit of any one of claims 1 to 10.