CN108803200A - Optical filter switching system - Google Patents

Abstract

An embodiment of the present invention provides an optical filter switching system, which includes: a second controller, a first controller respectively connected to the second controller, and an optical filter switcher carrying an optical filter. The first controller first determines the shooting mode of the shooting device, generates an enabling signal corresponding to the shooting mode, and outputs the enabling signal and the clock frequency of the first controller. The second controller receives the enabling signal and the clock frequency of the first controller, adjusts the clock frequency of the second controller to synchronize the clock frequencies of the two controllers, and generates a switch driving signal corresponding to the enabling signal. The optical filter switcher receives the switcher driving signal, and adjusts the position of the optical filter corresponding to the shooting mode according to the switcher driving signal, so as to complete the optical filter switching. The above clock frequency synchronization processing can enable the second controller to generate the switcher driving signal in time after receiving the enable signal, thereby reducing the time delay existing when the filter is switched, and improving the imaging effect of the shooting device.

Description

Filter switching system

technical field

The invention relates to the technical field of equipment control, in particular to an optical filter switching control system.

Background technique

Shooting equipment has been used in many fields in daily life. In order to ensure the imaging effect of the captured image, in addition to the image sensor, the shooting device is also provided with multiple optical filters used under different light intensities and a switching system responsible for switching the multiple optical filters. This switching system controls the work of different filters according to the light intensity, so as to ensure the imaging effect of the shooting device.

However, in the prior art, the filter switching system often cannot generate the driving signal for driving the filter switcher to switch the filter in time, so that there is a large time delay in the switching of the filter, which eventually leads to the failure of the shooting equipment. Imaging is poor.

Contents of the invention

In view of this, an embodiment of the present invention provides an optical filter switching system, which is used to reduce the delay existing when the optical filter is switched, and ensure the imaging effect of the photographing device.

An embodiment of the present invention provides an optical filter switching system, including: a first controller, a second controller, and an optical filter switcher carrying an optical filter, the second controller is connected with the first controller respectively device, the filter switch is connected;

The first controller is configured to determine a shooting mode of the shooting device, generate an enabling signal corresponding to the shooting mode, and output the enabling signal and a clock frequency of the first controller to the second controller;

The second controller is configured to receive the enabling signal and the clock frequency of the first controller, and adjust the clock frequency of the second controller so that the clock frequency of the second controller is the same as the clock frequency of the first controller synchronizing the clock frequency of the first controller, and generating a switch drive signal corresponding to the enable signal;

The filter switcher is configured to receive the switcher driving signal, and adjust the position of the filter corresponding to the shooting mode to the positive position of the image sensor in the shooting device according to the switcher driving signal. above.

The filter switching system provided by the embodiment of the present invention, the system includes: a first controller, a second controller, and a filter switcher carrying a filter, and the second controller communicates with the first controller and the Filter switcher connection. The specific working process of the system is as follows: the first controller first determines the shooting mode of the shooting device, generates an enabling signal corresponding to the shooting mode, and then outputs the enabling signal and the clock frequency of the first controller to the second controller. Then, the second controller receives the enable signal output by the first controller and the clock frequency of the first controller, and adjusts the clock frequency of the second controller so that the clock frequency of the second controller is the same as the clock frequency of the first controller. Synchronously, a switch drive signal corresponding to the enable signal is regenerated. Finally, the filter switcher receives the switcher driving signal output by the second controller, and then adjusts the position of the filter corresponding to the shooting mode to directly above the image sensor in the shooting device according to the switcher driving signal, that is, Complete the filter switch. Since the second controller adjusts its own clock frequency according to the clock frequency of the first controller, the clock frequencies of the two controllers are synchronized. This clock frequency synchronization process can ensure that the two controllers have the same working cycle, so that the second controller can generate the switcher drive signal in time after receiving the enable signal, thereby reducing the time delay existing when the filter is switched and improving the shooting efficiency. The imaging effect of the device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of Embodiment 1 of an optical filter switching system provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of Embodiment 2 of an optical filter switching system provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of Embodiment 3 of the filter switching system based on FIG. 1 provided by the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of Embodiment 3 of the filter switching system based on FIG. 2 provided by the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of Embodiment 4 of the filter switching system based on the embodiment of FIG. 3 provided by the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 4 of the filter switching system based on the embodiment of FIG. 4 provided by the embodiment of the present invention;

FIG. 7 is an actual circuit diagram of an optical filter switching system provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise, "multiple" generally includes At least two, but the inclusion of at least one is not excluded.

It should be understood that the term "and/or" used herein is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which may mean that A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Depending on the context, the words "if", "if" as used herein may be interpreted as "at" or "when" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrases "if determined" or "if detected (the stated condition or event)" could be interpreted as "when determined" or "in response to the determination" or "when detected (the stated condition or event) )" or "in response to detection of (a stated condition or event)".

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a good or system comprising a set of elements includes not only those elements but also includes items not expressly listed. other elements of the product, or elements inherent in the commodity or system. Without further limitations, an element qualified by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the article or system comprising the element.

Fig. 1 is a schematic structural diagram of Embodiment 1 of an optical filter switching system provided by an embodiment of the present invention. As shown in Fig. 1, the system may include: a first controller 11, a second controller 12, and a Filter switcher 13.

Wherein, the second controller 12 is connected to the first controller 11 and the filter switcher 13 respectively. And according to the different photographing performances of the photographing equipment installed with this optical filter switching system, the optical filter switcher 13 can carry a plurality of optical filters, and in an optional manner, the optical filters can be combined with the photographing equipment's The shooting modes correspond to each other one by one. In another optional way, the filter and the shooting mode can also have a many-to-one relationship, that is, for any shooting mode in the shooting device, the filter switcher 13 can carry a plurality of Filters for shooting modes. Multiple optical filters for the same shooting mode are used to improve the filtering effect on light with interference frequency bands, thereby achieving the purpose of further improving the imaging effect of the shooting device. In practical applications, optionally, the filtered light is usually infrared light. The shooting mode of the shooting device may be a daytime mode, a nighttime mode, or the like.

On the basis of the above description, the specific working process of this filter switching system can be as follows:

The first controller 11 first determines the current shooting mode of the shooting device. In an optional manner, the user may select a shooting mode through hardware or software buttons according to shooting requirements, and the first controller 11 determines the shooting mode of the shooting device in response to the user's selection operation. In another optional manner, the first controller 11 may first sense the light intensity of the shooting environment by using the photosensitive element configured in the shooting device itself, and then determine the shooting mode according to the obtained light intensity. Next, the first controller 11 generates an enabling signal corresponding to the determined shooting mode. Finally, the first controller 11 outputs the generated enable signal corresponding to the shooting mode and the clock frequency of its own clock signal to the second controller 12 .

The second controller 12 first receives the enable signal output by the first controller 11 and the clock frequency of the first controller 11 , and then performs synchronization processing on the clock frequency of the first controller 11 and the clock frequency of the second controller 12 . Finally, the second controller 12 generates a switch driving signal corresponding to the enable signal based on the adjusted clock frequency. At this time, both the enabling signal generated by the first controller 11 and the switch driving signal generated by the second controller 12 correspond to the shooting mode.

It should be noted here that the clock frequency of the controller can be indirectly understood as the duty cycle of the controller. When the clock frequency is not adjusted, the first controller 11 and the second controller 12 usually have different clock frequencies, that is, work cycles, and the controllers usually generate signals only at the beginning of a work cycle. Therefore, after the first controller 11 generates the enable signal, the second controller 12 will often generate the switch drive signal after a certain time interval, and this certain interval time is the difference between the duty cycles of the two controllers, which means That is, the switch drive signal generated by the second controller 12 is out of time. During this certain interval, the first controller 11 usually has gone through multiple working cycles.

After the clock frequency is adjusted, the two controllers can have the same clock frequency, that is, the same duty cycle. After the first controller 11 generates the enable signal, the second controller 12 can immediately generate the switch drive signal when the next working cycle of the first controller 11 or the second controller 12 starts, so that the enable signal is generated There is a minimum interval between the time for generating the driving signal for the switch and the time for generating the driving signal for the switch, that is, the timeliness for the second controller 12 to generate the driving signal for the switch is ensured. Optionally, the adjusted clock frequency of the two controllers may be 60 Hz.

The filter switcher 13 first receives the switcher driving signal generated by the second controller 12 and has high timeliness, and then switches the filter according to the switcher driving signal. The filter switching can specifically be expressed as: adjusting the position of the filter corresponding to the shooting mode to be directly above the image sensor in the shooting device. In this way, when the shooting device uses the image sensor to take pictures, the filter located directly above can filter out light in a specific frequency band, thereby ensuring the imaging effect of the shooting device. Optionally, a motor is also provided in the filter switcher 13, and the position of the filter can be adjusted by the motor.

In this embodiment, the filter switching system includes: a first controller 11, a second controller 12, and a filter switcher 13 carrying a filter, and the second controller 12 communicates with the first controller 11 respectively. Connect to the filter switcher 13. The specific working process of this system is: the first controller 11 first determines the shooting mode of the shooting device, generates an enabling signal corresponding to the shooting mode, and then outputs the enabling signal and the clock frequency of the first controller 11 to the second controller 12. Then, the second controller 12 receives the enable signal output by the first controller 11 and the clock frequency of the first controller 11, and adjusts the clock frequency of the second controller 12 so that the clock frequency of the second controller 12 is the same as that of the first controller 12. The clock frequency of the controller 11 is synchronized to generate a switch driving signal corresponding to the enable signal. Finally, the optical filter switcher 13 receives the switcher driving signal output by the second controller 12, and then adjusts the position of the optical filter corresponding to the shooting mode to directly above the image sensor in the shooting device according to the switcher driving signal, also That is to complete the switching of the filter. Since the second controller 12 adjusts its own clock frequency according to the clock frequency of the first controller 11, the clock frequencies of the two controllers are synchronized. This clock frequency synchronization process can ensure that the two controllers have the same duty cycle, so that the second controller 12 can generate a switch drive signal in time after receiving the enable signal, thereby reducing the time delay existing when the filter is switched, and improving The imaging effect of the shooting device.

Fig. 2 is a schematic structural diagram of Embodiment 2 of an optical filter switching system provided by an embodiment of the present invention. As shown in Fig. 2, the system may include: a first controller 11, a second controller 12, and a Filter switcher 13.

As the runtime of the filter switching system increases, the processed data also accumulates. In order to ensure that the system can continuously and correctly control the filter switcher 13 to switch filters, it is usually necessary to reset the system. In an optional reset mode, the first controller 11 is configured to generate a reset signal in response to the startup operation of the photographing device, and control the filter switcher 13 to reset according to the reset signal. The above-mentioned reset control of the filter switcher 13 can be understood as adjusting the position of the filter so that the filter used in the latest operation of the photographing device is located directly above the image sensor. Optionally, the starting operation of the shooting device is usually triggered by the user.

In practical applications, it is inevitable that the shooting equipment will be shut down abnormally such as sudden power failure. At this time, the user needs to restart the shooting device. And after restarting, the shooting mode and the used optical filter of the shooting device are usually the same as before the abnormal shutdown. In this case, the advantages of the above-mentioned reset method can be well highlighted, that is, the use of the above-mentioned reset method can avoid that after the shooting device is abnormally shut down and restarted, the filter used by the shooting device and the shooting The pattern does not match. Of course, the above-mentioned reset method can also be applied to the situation that the shooting device is turned on again after it is normally shut down.

Optionally, the optical filter switching system may further include a reset chip 14, and the above-mentioned reset process may be realized through the reset chip 14.

The reset chip 14 is connected to the first controller 11 . The reset chip 14 is specifically configured to receive the reset signal output by the first controller 11 . Then the reset signal is used to reset the filters in the filter switcher 13 .

Although it is mentioned in the foregoing that the shooting device may shut down abnormally, this kind of situation usually does not occur frequently in practical applications. For the situation that the shooting equipment is normally shut down and then turned on again, the shooting mode and the filter used before and after the startup will often change. The method of resetting the switcher" appears to be less necessary. Therefore, after responding to the start-up operation of the photographing device, optionally, the first controller 11 may also determine whether the latest shutdown of the photographing device is an abnormal shutdown, and select a different reset mode according to the judgment result.

Specifically, the first controller 11 judges whether the latest shutdown of the shooting device is an abnormal shutdown. If the latest shutdown is an abnormal shutdown, a reset signal is generated, and the position of the optical filter used in the latest work of the shooting device is adjusted to be directly above the image sensor. For a detailed description, reference may be made to the foregoing content, and details are not repeated here. If the last shutdown was a normal shutdown, another optional reset method can be used to adjust the position of the default filter to just above the image sensor.

In this embodiment, after the photographing device is started, the first controller 11 generates a reset signal, and resets the filter switcher 13 according to the reset signal. At this time, resetting the filter switcher 13 specifically includes: resetting the filter used when the photographing device was working last time to directly above the image sensor. This reset method is especially suitable for the situation that the shooting device is shut down abnormally and then restarted. Based on this, before generating the reset signal, the first controller 11 also judges whether the latest shutdown of the photographing device is an abnormal shutdown. If it is shut down abnormally, a reset signal is further generated, and the filter switcher 13 is reset in the above-mentioned manner. At the same time, the filter switching system also includes a reset chip 14, and the aforementioned reset operation to the filter switch 13 can be completed through this reset chip 14, so as to ensure that the filter switching system can correctly control the filter switching 13 switches the filter.

Fig. 3 is a schematic structural diagram of the third embodiment of the optical filter switching system provided by the embodiment of the present invention. As shown in Fig. 3, the first controller 11 in the system has a first output terminal OUT1, and the second controller 12 has a first Two input terminals IN1.

The first output terminal OUT1 of the first controller 11 is connected to the first input terminal IN1 of the second controller 12 . And the first controller 11 outputs the enabling signal corresponding to the shooting mode to the first input terminal IN1 of the second controller 12 through the first output terminal OUT1, and the second controller 12 can further generate a corresponding switch according to the enabling signal drive signal.

Optionally, the second controller 12 in the filter switching system specifically includes a first control chip 121 and a second control chip 122 . At this time, the first input terminal IN1' of the first controller chip 121 can be regarded as the first input terminal IN1 of the second controller.

Wherein, the first input terminal IN1' of the first control chip 121 is connected to the first output terminal OUT1 of the first controller 11. The first output terminal OUT2 of the first control chip 121 is connected to the first input terminal IN2 of the second control chip 122 , and the second output terminal OUT3 of the first control chip 121 is connected to the second input terminal IN3 of the second control chip 122 .

The first control chip 121 receives the enabling signal corresponding to the shooting mode generated by the first controller 11 through the first input terminal IN1', and generates a switcher driving signal including the first driving signal and the second driving signal according to the enabling signal . Wherein, both the first driving signal and the second driving signal are continuous level signals. Optionally, there is a preset corresponding relationship between the level of the first driving signal and the second driving signal and the filter corresponding to the shooting mode. For example, if the first driving signal is at a high level and the second driving signal is at a low level, the filter switcher 13 adjusts the filter used in the night mode directly above the image sensor. If the first driving signal is at a low level and the second driving signal is at a high level, the filter used in the day mode is adjusted directly above the image sensor. In other cases, the filter switcher 13 does not switch the filter.

Then, the first control chip 121 outputs the first driving signal to the first input terminal IN2 of the second control chip 122 through the first input terminal OUT2, and simultaneously outputs the second driving signal to the second control chip through the second input terminal OUT3. The second input terminal IN3 of the chip 122 . Optionally, the first control chip 121 may be a Microcontroller Unit (MCU for short) or a digital signal processing (Digital Signal Processing, DSP for short) chip powered by a single power supply and with a small package size. And the first control chip 121 also has a boost function, which can boost the enable signal input to the first control chip 121, so as to increase the voltage of the switch drive signal output by the first control chip 121, so that it meets the second Control chip 122 input requirements.

The second control chip 122 receives the switcher driving signal and processes the switcher driving signal to obtain a processed switcher driving signal in the form of discrete pulses. It is easy to understand that the processed switch driving signal also includes the processed first driving signal and the processed second driving signal.

It should be noted here that if the switcher drive signal generated by the first control chip 121 is directly output to the filter switcher 13, the unprocessed, continuous switcher drive signal will always drive the filter Switcher for filter switching. However, the switching action of the filter is usually an instantaneous action without continuity. That is, after the switching of the optical filter is completed, the first control chip 121 will continue to generate the switcher driving signal, but the generated switcher driving signal at this time has no effect on the switching of the optical filter. Therefore, using the second control chip 122 to process the switcher driving signal can prevent the filter switcher 13 from receiving useless switcher driving signals all the time.

In addition, in practical applications, the input end of the filter switcher 13 and the output end of the second control chip 122 often do not match. Therefore, optionally, the optical filter switching system further includes: a switch connecting component 15 .

Wherein, the first input terminal IN4 of the switch connection component 15 is connected to the first output terminal OUT4 of the second control chip 122, and the second input terminal IN5 of the switch connection component 15 is connected to the second output terminal OUT5 of the second control chip 122. connect. The output terminal OUT6 of the switcher connection component 15 is connected with the input terminal IN6 of the filter switcher 13 . The remaining ports of the switcher connection assembly 15 are all grounded.

The switcher connection component 15 is used to receive the processed switcher driving signal through the first input terminal IN4 and the second input terminal IN5, and then output the processed switcher drive signal to the optical filter through the output terminal OUT6 of the switcher connection component 15 Switcher input IN6.

The input end of the switcher connection assembly 15 is matched with the output end of the second control chip, and the output end of the switcher connection assembly 15 is matched with the filter switcher 13 input end, therefore, the processing can be made by the switcher connection assembly 15 The post-switcher drive signal is smoothly output from the second control chip 122 to the filter switcher 13, so that the filter switcher 13 can switch the filter according to the processed post-switcher drive signal.

It should be noted that the above description is based on the embodiment shown in FIG. 1 . In practical applications, the content involved in the above description can also be carried out on the basis of the embodiment shown in FIG. 2 , and a schematic structural diagram of the filter switching system at this time can be shown in FIG. 4 .

In this embodiment, the second controller 12 in the filter switching system specifically includes a first control chip 121 and a second control chip 122 . Wherein, the first control chip 121 is used for generating a continuous form of switch driving signal according to the enable signal. The second control chip 122 is used to process the continuous switch driving signal into a processed switch driving signal in discrete pulse form, so that the filter switch 13 does not continuously receive meaningless switch driving signals. In addition, the filter switching system further includes a switch connection component 15 for connecting the second control chip 122 and the filter switch 13 . By using the switcher connection component 15 , smooth signal transmission can be achieved between the second control chip 122 with mismatched interfaces and the filter switcher 13 , ensuring that the filter switcher switches filters correctly.

Fig. 5 is a schematic structural diagram of Embodiment 4 of the filter switching system provided by the embodiment of the present invention. As shown in Fig. 5, in order to ensure that the shooting device can have better imaging effects in different modes, the system may also include: Supplementary light source 16.

When the shooting mode of the shooting device is the night mode, it indicates that the light intensity of the current shooting environment is insufficient. At this time, the first controller 11 will generate a light source driving signal, and drive the supplementary light source 16 to light according to the light source driving signal, thereby Increase the light intensity of the shooting environment to ensure the imaging effect of the shooting equipment.

At the same time, as the lighting time of the supplementary light source 16 increases, the supplementary light source 16 will generate a certain amount of heat. In order to prevent the heat generated by the supplementary light source 16 from affecting the shooting device, optionally, the system may further include: a light source radiator 17 .

The first controller 11 is used to generate a radiator driving signal when the shooting mode is night mode, and drive the light source radiator 17 to turn on according to the radiator driving signal, so as to achieve the purpose of cooling the supplementary light source 16 .

Optionally, the filter switching system further includes: a switch circuit 18 and a power supply 19 . At this time, the light source radiator 17 is jointly affected by the driving signal of the radiator and the on-off state of the switch circuit.

Wherein, the input end of the switch circuit 18 is respectively connected with the power supply 19 and the second output end OUT7 of the first controller 11 , and the output end of the switch circuit 18 is connected with the light source radiator 17 .

The power supply 19 is used to supply power to the switch circuit 18 to make the switch circuit 18 conduct. When the switch circuit 18 is in the on state, the first controller 11 is used to output the radiator driving signal to the light source radiator 17 through the switch circuit 18 in the on state, so that the light source radiator is turned on normally.

In addition, the first controller 11 has a third output terminal OUT8 and a fourth output terminal OUT9 in addition to the above-mentioned first output terminal OUT1 and second output terminal OUT7 . Wherein, optionally, the first controller 11 may use its own third output terminal OUT8 to output the generated light source driving signal to the supplementary light source 16 . Simultaneously following the reset operation mentioned in the second embodiment, the first controller 11 can use its own fourth output terminal OUT9 to output a reset signal.

Optionally, the switch circuit 18 in the filter switching system may be composed of field effect transistors. Specifically, it may include a first field effect transistor 181 and a second field effect transistor 182 .

The gate of the first field effect transistor 181 is connected to the second output terminal OUT7 of the first controller 11, the source of the first field effect transistor 181 is connected to the power supply 19, and the drain of the first field effect transistor 181 dissipates heat with the light source Device 17 is connected. The gate of the second field effect transistor 182 is connected to the gate of the first field effect transistor 181, the source of the second field effect transistor 182 is connected to the source of the first field effect transistor 181, and the drain of the second field effect transistor 182 The pole is connected to the drain of the first field effect transistor 181. The above connection relationship shows that the two field effect transistors are connected in parallel, which is used to increase the driving capability. In practical applications, the field effect transistor may specifically be an insulated gate field effect transistor, or may be replaced by an insulated gate bipolar transistor.

Based on the above-mentioned switch circuit 18 including field effect transistors, the power supply 19 is specifically used to supply power to the first field effect transistor 181 and the second field effect transistor 182, so that the first field effect transistor 181 and the second field effect transistor 182 are in the conduction state. The first controller 11 is specifically configured to output the radiator driving signal to the light source radiator 17 through the first FET 181 and the second FET 182 in the conduction state, so that the light source radiator 17 is turned on normally.

Similar to the switch connection assembly in the third embodiment, optionally, the filter switching system may further include: a radiator connection assembly 20 .

The input terminal IN7 of the radiator connection component 20 is connected to the drain of the first field effect transistor 181 , and the output terminal OUT10 of the radiator connection component 20 is connected to the input terminal IN8 of the light source radiator 17 . The remaining ports of the heat sink connection assembly 20 are all grounded.

The input terminal IN7 of the radiator connection component 20 is matched with the drain of the first field effect transistor 181 , and the output terminal OUT10 of the radiator connection component 20 is matched with the input terminal of the light source radiator 17 . Therefore, the radiator driving signal can be output from the first controller 11 to the light source radiator 17 through the switch circuit 18 through the radiator connection assembly 20, so that the light source radiator 17 is normally turned on.

The first FET 181 and the second FET 182 have a specific and identical turn-on voltage. In practical applications, the conduction voltage is easily not equal to the output voltage of the power supply 19. At this time, the first field effect transistor 181 and the second field effect transistor 182 that are not conducting can not output the driving signal of the radiator to the light source. Radiator 17. Therefore, optionally, the optical filter switching system may further include: a voltage conversion circuit 21 .

The input terminal IN9 of the voltage conversion circuit 21 is connected to the power supply 19 , and the output terminal OUT11 of the voltage conversion circuit 21 is connected to the source of the second field effect transistor 182 .

The voltage conversion circuit 21 is used to adjust the output voltage of the power supply 19 so that the output voltage of the power supply 19 meets the conduction voltage of the first FET 181 and the second FET 182 .

In order to ensure the stability of the filter switching system, optionally, a current limiting element and a voltage stabilizing element may also be included. The current limiting element is used to ensure that the current input to each element in the filter switching system is not higher than the rated current of this element. The voltage stabilizing element is used to ensure that the signal output by each element has a stable voltage. Optionally, the current limiting element may be a current limiting resistor, and the voltage stabilizing element may be a capacitor.

It should be noted that, similar to the third embodiment, the above description is based on the embodiment shown in FIG. 3 . In practical applications, the content involved in the above description can also be carried out on the basis of the embodiment shown in FIG. 4 , and at this time, the structural schematic diagram of the optical filter switching system can be shown in FIG. 6 .

In this embodiment, the filter switching system further includes a supplementary light source 16 for increasing the light intensity of the shooting environment and a light source radiator 17 for dissipating heat from the supplementary light source 16 . These two elements can respectively guarantee the imaging effect and running state of the shooting device. At the same time, the system also includes a switch circuit 18 composed of field effect transistors connected in parallel and a power supply 19 for supplying power to the switch circuit 18 . At this time, the light source radiator 17 is jointly controlled by the radiator driving signal and the switch circuit 18, which can ensure that the light source radiator 17 is turned on in good time. In addition, the system also includes a radiator connection assembly 20 for connecting the switch circuit 18 and the light source radiator 17 . By using the radiator connection assembly 20, the radiator drive signal can be smoothly transmitted to the light source radiator 17, ensuring the heat dissipation effect of the radiator. The system also includes a voltage conversion circuit 21 for converting the output voltage of the power supply 19 so that the output voltage meets the conduction voltage of the field effect transistor. In this way, the power supply 19 can be used in different filter switching systems, and the switch circuits included in these filter switching systems have different conduction voltages.

Fig. 7 is the actual circuit diagram of the optical filter switching system provided by the embodiment of the present invention. It should be noted that the first controller 11, the optical filter switcher 13, the supplementary light source 19, and the light source are not shown in this actual circuit diagram. Radiator 17 parts.

U4 in FIG. 7 corresponds to the reset chip 14 above, and RESET#_MCU is a reset signal, which is output by the output terminal OUT9. U1 corresponds to the first control chip 121 above, pin 4 of U1 corresponds to the input IN1', pin 7 corresponds to the output terminal OUT2, and pin 6 corresponds to the output terminal OUT3. U2 corresponds to the second control chip 122 above, pin 8 in U2 corresponds to the input terminal IN2, pin 5 corresponds to the input terminal IN3, pin 4 corresponds to the output terminal OUT4, and pin 2 corresponds to the output terminal OUT5 ,. And the second controller 12 is composed of U1 and U2. GP2_MCU is the enable signal, which is output by the output terminal OUT1. GP1_MCU radiator drive signal, this signal is output by the output terminal OUT7. GP4 and GP5 are respectively the first driving signal and the second driving signal in the switcher driving signals.

CN1 corresponds to the above switch connection component 15 , pin 1 of CN1 corresponds to input terminal IN4 , and pin 2 corresponds to input terminal IN5 . Q1 corresponds to the first field effect transistor 181 above, and Q2 corresponds to the second field effect transistor 182 above, and the switch circuit 18 is composed of Q1 and Q2. CN2 corresponds to the radiator connection component 20 above, and pin 1 in CN2 corresponds to the input IN7. U3 corresponds to the voltage switching circuit 21 above. VCC connected to the input terminal VIN of U3 corresponds to the above-mentioned power supply 19 , pin 1 of U3 ie the input terminal VIN corresponds to IN9 , and pin 5 corresponds to OUT11 .

Resistors R1 , R2 , R3 , R4 , and R5 correspond to the above current limiting elements, and capacitors C1 , C2 , C3 , C4 , and C17 correspond to the above voltage stabilizing elements.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place , or can also be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative effort.

Through the above description of the implementations, those skilled in the art can clearly understand that each implementation can be implemented by means of a general-purpose hardware platform plus necessary, and of course, can also be implemented by combining hardware with software. Based on this understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of a product, and the computer product can be stored in a computer-readable storage medium, such as ROM/RAM, disk, A CD, etc., includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods of various embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (13)

1. A filter switching system, characterized in that it comprises: a first controller, a second controller and a filter switch carrying an optical filter, the second controller is connected to the first The controller and the filter switcher are connected; The first controller is configured to determine a shooting mode of the shooting device, generate an enabling signal corresponding to the shooting mode, and output the enabling signal and a clock frequency of the first controller to the second controller; The second controller is configured to receive the enabling signal and the clock frequency of the first controller, and adjust the clock frequency of the second controller so that the clock frequency of the second controller is the same as the clock frequency of the first controller synchronizing the clock frequency of the first controller, and generating a switch drive signal corresponding to the enable signal; The filter switcher is configured to receive the switcher driving signal, and adjust the position of the filter corresponding to the shooting mode to the positive position of the image sensor in the shooting device according to the switcher driving signal. above. 2. The system according to claim 1, wherein the first controller is further used for: In response to the start-up operation of the photographing device, a reset signal is generated, and the filter switcher is controlled to reset according to the reset signal, so that the filter used when the photographing device was working last time is located at the position of the image sensor directly above the . 3. The system according to claim 2, further comprising: a reset chip connected to the first controller; The reset chip is configured to receive the reset signal output by the first controller, and use the reset signal to reset the optical filter used when the photographing device worked last time to directly above the image sensor. 4. The system according to claim 2, wherein the first controller is further used for: If the latest shutdown of the photographing device is an abnormal shutdown, the reset signal is generated. 5. The system of claim 1, wherein the first controller has a first output and the second controller has a first input; The first output terminal of the first controller is connected to the first input terminal of the second controller; The first controller is configured to output an enable signal corresponding to the shooting mode to the first input end of the second controller through the first output end, so that the second controller generates the The switcher drive signal described above. 6. The system according to claim 5, wherein the second controller specifically comprises: a first control chip and a second control chip; The first input end of the first control chip is connected to the first output end of the first controller; The first output terminal of the first control chip is connected to the first input terminal of the second control chip, and the second output terminal of the first control chip is connected to the second input terminal of the second control chip; The first control chip is configured to receive an enable signal corresponding to the shooting mode through a first input terminal of the first control chip, and generate a first drive signal and a second drive signal according to the enable signal the switch drive signal, and output the first drive signal to the first input terminal of the second control chip, and output the second drive signal to the second input terminal of the second control chip , wherein both the first drive signal and the second drive signal are continuous signals; The second control chip is configured to receive the switcher driving signal, and process the switcher driving signal to obtain a processed switcher driving signal in the form of discrete pulses. 7. The system according to claim 6, further comprising: a switch connection component; The first input terminal of the switch connection component is connected to the first output terminal of the second control chip, and the second input terminal of the switch connection component is connected to the second output terminal of the second control chip; The output end of the switcher connection component is connected to the input end of the filter switcher; The switch connection component is configured to receive the processed switch drive signal through the first input terminal and the second input terminal of the switch connection component, and transmit the processed signal through the output terminal of the switch connection component. The rear switcher drive signal is output to the input end of the filter switcher; The output end of the switcher connection component is matched with the input end of the filter switcher, so that the filter switcher switches the filter according to the processed switcher driving signal. 8. The system according to any one of claims 5 to 7, characterized in that the system further comprises: a supplementary light source; The first controller is configured to generate a light source driving signal when the shooting mode is night mode, and drive the supplementary light source to turn on according to the light source driving signal, so as to increase the light intensity of the shooting environment. 9. The system according to claim 8, further comprising: a light source radiator; The first controller is configured to generate a radiator driving signal when the shooting mode is night mode, and drive the light source radiator to turn on according to the radiator driving signal. 10. The system according to claim 9, further comprising: a switching circuit and a power supply; The input end of the switch circuit is connected to the power supply and the second output end of the first controller, and the output end of the switch circuit is connected to the light source radiator; The power supply is used to supply power to the switch circuit, so that the switch circuit is turned on; The first controller is configured to output the heat sink driving signal to the light source heat sink through the switch circuit in a conducting state, so that the light source heat sink is normally turned on. 11. The system according to claim 10, wherein the switch circuit specifically comprises: a first field effect transistor and a second field effect transistor; The gate of the first field effect transistor is connected to the second output terminal of the first controller, the source of the first field effect transistor is connected to the power supply, and the drain of the first field effect transistor is connected to the second output terminal of the first controller. The light source radiator is connected; The gate of the second field effect transistor is connected to the gate of the first field effect transistor, the source of the second field effect transistor is connected to the source of the first field effect transistor, and the second field effect transistor is connected to the source of the first field effect transistor. The drain of the field effect transistor is connected to the drain of the first field effect transistor; The power supply is used to supply power to the first field effect transistor and the second field effect transistor, so as to turn on the first field effect transistor and the second field effect transistor. The first controller is configured to output the radiator drive signal to the light source radiator through the first field effect transistor and the second field effect transistor in the conduction state, so that the light source The radiator is turned on normally. 12. The system according to claim 11, further comprising: a radiator connection assembly; The input end of the radiator connection assembly is connected to the drain of the first field effect transistor, and the output end of the radiator connection assembly is connected to the input end of the light source radiator; The radiator connection component is configured to receive the radiator drive signal through the input end of the radiator connection component, and output the radiator drive signal to the light source for heat dissipation through the output terminal of the radiator connection component. device; The output end of the radiator connection component matches the input end of the light source radiator, so that the light source radiator is normally turned on. 13. The system according to claim 11 or 12, further comprising: a voltage conversion circuit; The input terminal of the voltage conversion circuit is connected to the power supply, and the output terminal of the voltage conversion circuit is connected to the source of the second field effect transistor; The voltage conversion circuit is used to adjust the output voltage of the power supply, so that the output voltage of the power supply meets the conduction voltage of the first field effect transistor and the second field effect transistor.