CN108803200B - Optical filter switching system - Google Patents
Optical filter switching system Download PDFInfo
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- CN108803200B CN108803200B CN201810717291.4A CN201810717291A CN108803200B CN 108803200 B CN108803200 B CN 108803200B CN 201810717291 A CN201810717291 A CN 201810717291A CN 108803200 B CN108803200 B CN 108803200B
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- controller
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- driving signal
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/667—Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
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Abstract
The embodiment of the invention provides an optical filter switching system, which comprises: a second controller, a first controller connected with the second controller, and a filter switcher carrying the filter. The first controller determines a photographing mode of the photographing apparatus first, generates an enable signal corresponding to the photographing mode, and outputs the enable signal and a clock frequency of the first controller. The second controller receives the enable 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 switcher driving signal corresponding to the enable 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 optical filter switching. The clock frequency synchronization processing enables the second controller to generate a switcher driving signal in time after receiving the enabling signal, so that time delay existing in optical filter switching is reduced, and the imaging effect of the shooting equipment is improved.
Description
Technical Field
The invention relates to the technical field of equipment control, in particular to an optical filter switching control system.
Background
Photographing apparatuses have been applied to numerous fields in daily life. In order to ensure the imaging effect of the photographed image, the photographing apparatus may be provided with a plurality of filters respectively used under different illumination intensities and a switching system for switching the plurality of filters, in addition to the image sensor. The switching system controls different optical filters to work according to the illumination intensity, so that the imaging effect of the shooting equipment is ensured.
However, in the prior art, the optical filter switching system often cannot generate a driving signal for driving the optical filter switcher to switch the optical filter in time, so that a large time delay exists in the switching of the optical filter, and finally, the imaging effect of the shooting device is poor.
Disclosure of Invention
In view of this, the embodiment of the invention provides an optical filter switching system, which is used to reduce the delay existing during the optical filter switching and ensure the imaging effect of the shooting device.
An embodiment of the present invention provides an optical filter switching system, including: the optical filter switching device comprises a first controller, a second controller and an optical filter switcher bearing an optical filter, wherein the second controller is respectively connected with the first controller and the optical filter switcher;
the first controller is used for determining a shooting mode of a shooting device, generating an enable signal corresponding to the shooting mode, and outputting the enable signal and the clock frequency of the first controller to the second controller;
the second controller for receiving the enable signal and the clock frequency of the first controller, adjusting the clock frequency of the second controller to synchronize the clock frequency of the second controller with the clock frequency of the first controller, and generating a switcher driving signal corresponding to the enable signal;
the optical filter switcher is used for receiving the switcher driving signal and adjusting the position of the optical filter corresponding to the shooting mode to be right above an image sensor in the shooting equipment according to the switcher driving signal.
The optical filter switching system provided by the embodiment of the invention comprises: the optical filter switching device comprises a first controller, a second controller and an optical filter switcher carrying optical filters, wherein the second controller is respectively connected with the first controller and the optical filter switcher. The specific working process of the system is as follows: the first controller determines a shooting mode of the shooting device, generates an enable signal corresponding to the shooting mode, and outputs the enable signal and a 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, adjusts the clock frequency of the second controller to synchronize the clock frequency of the second controller with the clock frequency of the first controller, and generates a switcher driving signal corresponding to the enable signal. Finally, the optical filter switcher receives the switcher driving signal output by the second controller, and then adjusts the position of the optical filter corresponding to the shooting mode to be right above the image sensor in the shooting equipment according to the switcher driving signal, namely, the switching of the optical filter is completed. The second controller can adjust the clock frequency of the second controller according to the clock frequency of the first controller, so that the clock frequencies of the two controllers are synchronized. The clock frequency synchronous processing can ensure that the two controllers have the same working period, so that the second controller can generate a switcher driving signal in time after receiving the enabling signal, thereby reducing the time delay existing when the optical filter is switched and improving the imaging effect of the shooting equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of a filter switching system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of a filter switching system according to the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of the optical filter switching system according to the embodiment of the invention and based on fig. 1;
fig. 4 is a schematic structural diagram of a third embodiment of the optical filter switching system according to the embodiment of the invention, based on fig. 2;
fig. 5 is a schematic structural diagram of a fourth embodiment of the optical filter switching system according to the embodiment of fig. 3 in the disclosure;
fig. 6 is a schematic structural diagram of a fourth embodiment of the optical filter switching system according to the embodiment of fig. 4 in the disclosure;
fig. 7 is a circuit diagram of an embodiment of a filter switching system.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude the inclusion of at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or system in which the element is included.
Fig. 1 is a schematic structural diagram of a first embodiment of a filter switching system according to an embodiment of the present invention, and as shown in fig. 1, the system may include: a first controller 11, a second controller 12 and a filter switcher 13 carrying filters.
The second controller 12 is connected to the first controller 11 and the filter switcher 13, respectively. And according to the shooting performance of the shooting device equipped with the filter switching system, a plurality of filters can be carried in the filter switcher 13, and optionally, the filters can be in one-to-one correspondence with the shooting modes of the shooting device. Alternatively, the filter and the shooting mode may be in a many-to-one relationship, that is, for any shooting mode in the shooting device, a plurality of filters corresponding to the shooting mode may be carried in the filter switcher 13. The optical filters aiming at the same shooting mode are used to improve the filtering effect on the light with the interference frequency band, so that the purpose of further improving the imaging effect of the shooting equipment is achieved. In practical applications, the filtered light is usually infrared light. The photographing mode of the photographing apparatus may be a daytime mode, a nighttime mode, or the like.
Based on the above description, the specific working process of the optical filter switching system may be as follows:
the first controller 11 first determines the current shooting mode of the shooting device. Alternatively, the user may select a photographing mode through a button in the form of hardware or software according to photographing requirements, and the first controller 11 determines the photographing mode of the photographing apparatus by responding to the user's selection operation. Alternatively, the first controller 11 may first sense the light intensity of the shooting environment by using a 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 enable signal corresponding thereto according to the determined photographing mode. Finally, the first controller 11 outputs the generated enable signal corresponding to the shooting mode and the clock frequency of the own clock signal to the second controller 12 together.
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 switcher driving signal corresponding to the enable signal based on the adjusted clock frequency. At this time, both the enable signal generated by the first controller 11 and the switcher drive signal generated by the second controller 12 correspond to the shooting mode.
It should be noted here that the clock frequency of the controller may be indirectly understood as the duty cycle of the controller. The first controller 11 and the second controller 12 usually have different clock frequencies, i.e. duty cycles, when no clock frequency adjustment is performed, and the controllers usually generate signals at the beginning of a duty cycle. Therefore, after the first controller 11 generates the enable signal, the second controller 12 will often generate the switch driving signal after a certain time interval, which is the difference between the duty cycles of the two controllers, and this means that the switch driving signal generated by the second controller 12 is not timely. During this certain interval, the first controller 11 typically has elapsed a number of duty cycles.
After the clock frequency adjustment, the two controllers can have the same clock frequency, that is, the same work cycle. After the first controller 11 generates the enable signal, the second controller 12 may generate the switch driving signal immediately at the beginning of the next duty cycle of the first controller 11 or the second controller 12, so that there is a minimum interval between the time when the enable signal is generated and the time when the switch driving signal is generated, i.e., the timeliness of the second controller 12 for generating the switch driving signal is ensured. Alternatively, the clock frequency of the two controllers after adjustment may be 60 Hz.
The filter switch 13 first receives the switch driving signal with high timeliness generated by the second controller 12, and then switches the filter according to the switch driving signal. The filter switching may be embodied as: the position of the filter corresponding to the photographing mode is adjusted to be directly above the image sensor in the photographing apparatus. When shooting equipment uses image sensor to shoot like this, be located directly over the light filter can play the effect of the light of filtering specific frequency channel to guarantee shooting equipment's formation of image effect. Optionally, a motor is further provided in the filter switcher 13, and the position of the filter can be adjusted by the motor.
In this embodiment, the optical filter switching system includes: a first controller 11, a second controller 12 and a filter switch 13 carrying filters, and the second controller 12 is connected to the first controller 11 and the filter switch 13, respectively. The specific working process of the system is as follows: the first controller 11 determines a photographing mode of the photographing apparatus, generates an enable signal corresponding to the photographing mode, and outputs the enable signal and a clock frequency of the first controller 11 to the second controller 12. Then, the second controller 12 receives the enable signal output from the first controller 11 and the clock frequency of the first controller 11, adjusts the clock frequency of the second controller 12 so that the clock frequency of the second controller 12 is synchronized with the clock frequency of the first controller 11, and then generates a switcher 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 adjusts the position of the optical filter corresponding to the shooting mode to be right above the image sensor in the shooting device according to the switcher driving signal, that is, completes the switching of the optical filter. The second controller 12 adjusts its own clock frequency according to the clock frequency of the first controller 11, so as to achieve clock frequency synchronization of the two controllers. The clock frequency synchronization process can ensure that the two controllers have the same working period, so that the second controller 12 can generate a switcher driving signal in time after receiving the enabling signal, thereby reducing the time delay existing during the switching of the optical filter and improving the imaging effect of the shooting equipment.
Fig. 2 is a schematic structural diagram of a second embodiment of a filter switching system according to the present invention, and as shown in fig. 2, the system may include: a first controller 11, a second controller 12 and a filter switcher 13 carrying filters.
As the operating time of the filter switching system increases, process data is accumulated. To ensure that the system can continuously and correctly control the filter switcher 13 to switch the filters, the system generally needs to be reset. In an alternative reset mode, the first controller 11 is configured to generate a reset signal in response to a start-up operation of the photographing apparatus, and to control the filter switcher 13 to reset according to the reset signal. The above-described control of resetting of the filter switcher 13 can be understood as adjusting the position of the filter so that the filter used in the last operation of the photographing apparatus is positioned directly above the image sensor. Alternatively, the start-up operation of the photographing apparatus is usually triggered by the user.
In practical application, abnormal shutdown conditions such as sudden power failure and the like can be avoided for shooting equipment. At this time, the user needs to turn on the shooting device again. And after the device is turned on again, the shooting mode of the shooting device and the used filter are generally the same as before the abnormal shutdown. In this case, the advantage of the reset mode can be well highlighted, that is, the reset mode can be used to prevent the optical filter used by the shooting device from not corresponding to the shooting mode after the shooting device is abnormally powered off and restarted. Of course, the reset mode can also be applied to the situation that the shooting device is restarted after being normally shut down.
Optionally, the optical filter switching system may further include a reset chip 14, and the reset process described above may be implemented by the reset chip 14.
The reset chip 14 is connected to the first controller 11. The reset chip 14 is specifically configured to receive a reset signal output by the first controller 11. The filters in the filter switcher 13 are then reset by the reset signal.
Although the foregoing refers to a case where the photographing apparatus is abnormally shut down, the frequency of occurrence of such a case is not generally high in practical use. In the case where the photographing apparatus is normally powered off and then powered on again, the photographing mode and the optical filter used before and after the power on are often changed, and at this time, the necessity is low by using the above-mentioned manner of "resetting the optical filter switch according to the optical filter used when the photographing apparatus has recently worked". Therefore, after responding to the startup operation of the photographing apparatus, optionally, the first controller 11 may also determine whether the latest shutdown of the photographing apparatus is an abnormal shutdown, and select a different reset manner according to the determination result.
Specifically, the first controller 11 determines whether the last shutdown of the photographing apparatus is an abnormal shutdown. If the last shutdown is abnormal shutdown, a reset signal is generated, and the position of the optical filter used when the shooting equipment works last time is adjusted to be right above the image sensor. For a detailed description, reference is made to the foregoing description and no further description is deemed necessary. If the last shutdown is a normal shutdown, another optional reset mode may be used to adjust the position of the default filter to be directly above the image sensor.
In this embodiment, after the shooting device is started, the first controller 11 generates a reset signal, and resets the filter switch 13 according to the reset signal. At this time, resetting the filter switcher 13 specifically includes: and resetting the optical filter used when the shooting equipment works for the last time to be right above the image sensor. The reset mode is particularly suitable for the condition that the shooting equipment is abnormally shut down and restarted. Based on this, the first controller 11 also determines whether the last shutdown of the photographing apparatus is an abnormal shutdown before the reset signal is generated. If the shutdown is abnormal, a reset signal is further generated, and the filter switcher 13 is reset in the above manner. Meanwhile, the optical filter switching system further includes a reset chip 14, and the aforementioned resetting operation performed on the optical filter switch 13 can be completed through the reset chip 14, so as to ensure that the optical filter switching system can correctly control the optical filter switch 13 to switch the optical filter.
Fig. 3 is a schematic structural diagram of a third embodiment of the filter switching system according to the present invention, and as shown IN fig. 3, the first controller 11 of the system has a first output terminal OUT1, and the second controller 12 has a second input terminal IN 1.
The first output OUT1 of the first controller 11 is connected to the first input IN1 of the second controller 12. And the first controller 11 outputs an enable signal corresponding to the photographing mode to the first input terminal IN1 of the second controller 12 through the first output terminal OUT1, the second controller 12 may further generate a corresponding switcher drive signal according to the enable signal.
Optionally, the second controller 12 in the optical filter switching system specifically includes a first control chip 121 and a second control chip 122. At this time, the first input terminal IN 1' of the first controller chip 121 may be considered as the first input terminal IN1 of the second controller.
The first input terminal IN 1' of the first controller chip 121 is connected to the first output terminal OUT1 of the first controller 11. The first output terminal OUT2 of the first controller chip 121 is connected to the first input terminal IN2 of the second controller chip 122, and the second output terminal OUT3 of the first controller chip 121 is connected to the second input terminal IN3 of the second controller chip 122.
The first control chip 121 receives the enable signal corresponding to the photographing mode generated by the first controller 11 through the first input terminal IN 1', and generates a switcher driving signal including a first driving signal and a second driving signal according to the enable signal. The first driving signal and the second driving signal are both continuous level signals. Optionally, there is a preset corresponding relationship between the levels of the first driving signal and the second driving signal and the filter corresponding to the shooting mode. For example, when 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 to be 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 daytime mode is adjusted to be right above the image sensor. Otherwise, the filter switcher 13 does not switch the filters.
Then, the first controller chip 121 outputs the first driving signal to the first input terminal IN2 of the second controller chip 122 through the first input terminal OUT2, and simultaneously outputs the second driving signal to the second input terminal IN3 of the second controller chip 122 through the second input terminal OUT 3. Alternatively, the first control chip 121 may be a Micro Control Unit (MCU) or a Digital Signal Processing (DSP) chip that is powered by a single power supply and has a small package size. The first control chip 121 further has a voltage boosting function, and is capable of boosting an enable signal input to the first control chip 121 to boost a voltage of the switch driving signal output by the first control chip 121, so that the voltage of the switch driving signal meets an input requirement of the second control chip 122.
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 will be readily appreciated that the processed switcher drive signals likewise include a processed first drive signal and a processed second drive signal.
It should be noted that if the switch driving signal generated by the first control chip 121 is directly outputted to the filter switch 13, the unprocessed, continuous-form switch driving signal will always drive the filter switch to switch the filter. However, the switching operation of the filter is usually a transient operation and has no continuity. That is, after the switching of the optical filter is completed, the first control chip 121 still generates the switch driving signal, but the generated switch driving signal does not contribute to the switching of the optical filter. Therefore, processing the switch driving signal by the second control chip 122 can prevent the filter switch 13 from receiving a useless switch driving signal all the time.
In addition, in practical applications, the input terminal of the filter switch 13 and the output terminal of the second control chip 122 are often mismatched. Therefore, optionally, the filter switching system further comprises: the switch connection assembly 15.
The first input terminal IN4 of the switch connection assembly 15 is connected to the first output terminal OUT4 of the second controller chip 122, and the second input terminal IN5 of the switch connection assembly 15 is connected to the second output terminal OUT5 of the second controller chip 122. The output OUT6 of the switch connection component 15 is connected to the input IN6 of the filter switch 13. The remaining ports of the switch connection assembly 15 are all grounded.
The switch connecting assembly 15 is configured to receive the processed switch driving signal through the first input terminal IN4 and the second input terminal IN5, and output the processed switch driving signal to the input terminal IN6 of the filter switch through the output terminal OUT6 of the switch connecting assembly 15.
The input terminal of the switch connecting assembly 15 is matched with the output terminal of the second control chip, and the output terminal of the switch connecting assembly 15 is matched with the input terminal of the filter switch 13, so that the processed switch driving signal can be smoothly output from the second control chip 122 to the filter switch 13 through the switch connecting assembly 15, and the filter switch 13 can switch the filter according to the processed switch driving signal.
It should be noted that the above description is based on the embodiment shown in fig. 1. In practical applications, what is referred to in the above description may also be performed on the basis of the embodiment shown in fig. 2, and in this case, the schematic structural diagram of the filter switching system may be shown in fig. 4.
In this embodiment, the second controller 12 in the optical filter switching system specifically includes a first control chip 121 and a second control chip 122. The first control chip 121 is configured to generate a switch driving signal in a continuous form according to the enable signal. The second control chip 122 is used for processing the continuous-type switcher driving signal into a discrete-pulse-type processed switcher driving signal, so that the filter switcher 13 can not continuously receive meaningless switcher 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 switch connection assembly 15, smooth signal transmission can be realized between the second control chip 122 and the optical filter switch 13, which have unmatched interfaces, so as to ensure that the optical filter switch can correctly switch the optical filter.
Fig. 5 is a schematic structural diagram of a fourth embodiment of the optical filter switching system according to the embodiment of the present invention, as shown in fig. 5, in order to ensure that the shooting device has a better imaging effect in different modes, the system may further include: and a fill-in light source 16.
When the shooting mode of the shooting device is the night mode, it indicates that the illumination intensity of the current shooting environment is insufficient, at this time, the first controller 11 generates a light source driving signal, and drives the light supplementing light source 16 to light according to the light source driving signal, so that the illumination intensity of the shooting environment is improved, and the imaging effect of the shooting device is ensured.
Meanwhile, as the lighting time of the light supplement light source 16 increases, the light supplement light source 16 generates a certain amount of heat. In order to avoid the influence of the heat generated by the fill-in light source 16 on the shooting device, optionally, the system may further include: a light source heat sink 17.
The first controller 11 is configured to generate a radiator driving signal when the shooting mode is the night mode, and drive the light source radiator 17 to be turned on according to the radiator driving signal, so as to achieve a purpose of radiating heat for the light supplement light source 16.
Optionally, the filter switching system further comprises: a switching circuit 18 and a power supply 19. At this time, the light source heat sink 17 is affected by the heat sink driving signal and the on/off state of the switch circuit.
Wherein, the input terminal of the switch circuit 18 is connected to the power supply 19 and the second output terminal OUT7 of the first controller 11, respectively, and the output terminal of the switch circuit 18 is connected to the light source heat sink 17.
The power supply 19 is used to supply power to the switching circuit 18 so as to turn on the switching circuit 18. When the switch circuit 18 is in the on state, the first controller 11 is configured to output a heat sink driving signal to the light source heat sink 17 through the switch circuit 18 in the on state, so that the light source heat sink is normally turned on.
In addition, the first controller 11 has a third output terminal OUT8 and a fourth output terminal OUT9 in addition to the first output terminal OUT1 and the second output terminal OUT 7. Wherein, optionally, the first controller 11 may output the generated light source driving signal to the fill-in light source 16 using its own third output terminal OUT 8. While taking over the reset operation mentioned in the second embodiment, the first controller 11 may output the reset signal using its own fourth output terminal OUT 9.
Alternatively, the switching circuit 18 in the filter switching system may be composed of a field effect transistor. Specifically, a first fet 181 and a second fet 182 may be included.
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 is connected to the light source heat sink 17. 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 is connected to the drain of the first field effect transistor 181. The above connection relationship indicates that the two fets are connected in parallel, which is used to increase the driving capability. In practical application, the field effect transistor can be an insulated gate field effect transistor, and can also be replaced by an insulated gate bipolar transistor.
Based on the switching circuit 18 including the fet, the power supply 19 is specifically configured to supply power to the first fet 181 and the second fet 182, so that the first fet 181 and the second fet 182 are in a conducting state. The first controller 11 is specifically configured to output a heat sink driving signal to the light source heat sink 17 through the first field effect transistor 181 and the second field effect transistor 182 in the on state, so that the light source heat sink 17 is normally turned on.
Similarly to the switch connecting component in the third embodiment, optionally, the optical filter switching system may further include: the heat sink connecting assembly 20.
The input terminal IN7 of the heat sink connection assembly 20 is connected to the drain of the first fet 181, and the output terminal OUT10 of the heat sink connection assembly 20 is connected to the input terminal IN8 of the light source heat sink 17. The remaining ports of the heat sink connection assembly 20 are all grounded.
The input terminal IN7 of the heat sink connecting assembly 20 matches the drain of the first fet 181, and the output terminal OUT10 of the heat sink connecting assembly 20 matches the input terminal of the light source heat sink 17. Therefore, the heat sink driving signal can be outputted from the first controller 11 to the light source heat sink 17 through the switch circuit 18 by the heat sink connecting assembly 20, so that the light source heat sink 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 turn-on voltage is easily different from the voltage output by the power supply 19, and the first fet 181 and the second fet 182 that are not turned on cannot output the heat sink driving signal to the light source heat sink 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 fet 182.
The voltage conversion circuit 21 is configured to adjust the output voltage of the power supply 19 so that the output voltage of the power supply 19 satisfies the turn-on voltage of the first fet 181 and the second fet 182.
In order to ensure the stability of the optical filter switching system, optionally, a current limiting element and a voltage stabilizing element may be further included. The current limiting element is used to ensure that the current of the input element in the optical filter switching system is not higher than the rated current of the element. The voltage stabilizing element is used for ensuring that signals output by all elements have stable voltage. Alternatively, 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 embodiment, the above description is made on the basis of the embodiment shown in fig. 3. In practical applications, what is referred to in the above description may also be performed on the basis of the embodiment shown in fig. 4, and in this case, the schematic structural diagram of the filter switching system may be shown in fig. 6.
In this embodiment, the optical filter switching system further includes a light supplement light source 16 for increasing the illumination intensity of the shooting environment and a light source radiator 17 for radiating the light supplement light source 16. These two elements can ensure the imaging effect and the operating state of the camera device, respectively. Meanwhile, the system further comprises a switching circuit 18 composed of field effect transistors connected in parallel and a power supply 19 for supplying power to the switching circuit 18. At this time, the light source heat sink 17 is controlled by the heat sink driving signal and the switch circuit 18, so that the light source heat sink 17 can be opened timely. In addition, the system further comprises a heat sink connection assembly 20 for connecting the switching circuit 18 and the light source heat sink 17. By using the heat sink connecting assembly 20, the heat sink driving signal can be smoothly transmitted to the light source heat sink 17, and the heat dissipation effect of the heat sink can be ensured. The system further comprises a voltage conversion circuit 21 for converting the output voltage of the power supply 19 such that the output voltage meets the turn-on voltage of the fet. This allows the power supply 19 to be adapted to different filter switching systems, and the switching circuits included in these filter switching systems have different on voltages.
Fig. 7 is a circuit diagram of an embodiment of the present invention, wherein the first controller 11, the filter switch 13, the fill light source 19, and the light source heat sink 17 are not shown in the circuit diagram.
U4 in fig. 7 corresponds to the RESET chip 14 described above, and the RESET # MCU is a RESET signal, which is output from the output terminal OUT 9. U1 corresponds to the first controller chip 121 above, pin 4 IN U1 corresponds to the input IN 1', pin 7 corresponds to the output OUT2, and pin 6 corresponds to the output OUT 3. U2 corresponds to the second controller chip 122 described above, with pin 8 IN U2 corresponding to input IN2, pin 5 corresponding to input IN3, pin 4 corresponding to output OUT4, and pin 2 corresponding to output OUT 5. And the second controller 12 is composed of U1 and U2. GP2_ MCU is an enable signal, which is output by output terminal OUT 1. GP1_ MCU radiator drive signal, which is output from output OUT 7. GP4 and GP5 are the first and second driving signals, respectively, of the switcher driving signals.
CN1 corresponds to the switch connection component 15 above, pin 1 IN CN1 corresponds to input IN4, and pin 2 corresponds to input IN 5. Q1 corresponds to the first fet 181 above, Q2 corresponds to the second fet 182 above, and the switching circuit 18 is composed of Q1 and Q2. CN2 corresponds to the heat sink connection assembly 20 above, pin 1 IN CN2 corresponds to the IN7 input. U3 corresponds to the voltage switching circuit 21 above. VCC connected to the input terminal VIN of U3 corresponds to the power supply 19 described above, pin 1, i.e., input terminal VIN, of U3 corresponds to IN9, and pin 5 corresponds to OUT 11.
The resistors R1, R2, R3, R4, and R5 correspond to the above current limiting elements, and the capacitors C1, C2, C3, C4, and C17 correspond to the above voltage stabilizing elements.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by adding a necessary general hardware platform, and of course, can also be implemented by hardware in combination with software. With this understanding in mind, the above technical solutions may be embodied in the form of a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., which includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. A filter switching system, comprising: the optical filter switching device comprises a first controller, a second controller and an optical filter switcher bearing an optical filter, wherein the second controller is respectively connected with the first controller and the optical filter switcher;
the first controller is used for determining a shooting mode of a shooting device, generating an enable signal corresponding to the shooting mode, and outputting the enable signal and the clock frequency of the first controller to the second controller;
the second controller for receiving the enable signal and the clock frequency of the first controller, adjusting the clock frequency of the second controller to synchronize the clock frequency of the second controller with the clock frequency of the first controller, and generating a switcher driving signal corresponding to the enable signal;
the optical filter switcher is used for receiving the switcher driving signal and adjusting the position of the optical filter corresponding to the shooting mode to be right above an image sensor in the shooting equipment according to the switcher driving signal.
2. The system of claim 1, wherein the first controller is further configured to:
and generating a reset signal in response to the starting operation of the shooting device, and controlling the optical filter switcher to reset according to the reset signal so that the optical filter used when the shooting device works last time is positioned right above the image sensor.
3. The system of claim 2, further comprising: the reset chip is connected with the first controller;
the reset chip is used for receiving the reset signal output by the first controller and resetting the optical filter used by the shooting equipment in the last working process to be right above the image sensor by using the reset signal.
4. The system of claim 2, wherein the first controller is further configured to:
and if the shooting equipment is powered off abnormally last time, generating the reset signal.
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 end of the first controller is connected with the first input end of the second controller;
the first controller is configured to output an enable signal corresponding to the shooting mode to a first input terminal of the second controller through the first output terminal, so that the second controller generates the switcher driving signal.
6. The system according to claim 5, characterized in that the second controller comprises in particular: the system comprises a first control chip and a second control chip;
the first input end of the first control chip is connected with the first output end of the first controller;
the first output end of the first control chip is connected with the first input end of the second control chip, and the second output end of the first control chip is connected with the second input end 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 end of the first control chip, generate the switcher drive signal including a first drive signal and a second drive signal according to the enable signal, output the first drive signal to a first input end of the second control chip, and output the second drive signal to a second input end of the second control chip, where the first drive signal and the second drive signal are both continuous signals;
the second control chip is used for receiving the switcher driving signal and processing the switcher driving signal to obtain a processed switcher driving signal in a discrete pulse form.
7. The system of claim 6, further comprising: a switcher connection assembly;
the first input end of the switcher connecting assembly is connected with the first output end of the second control chip, and the second input end of the switcher connecting assembly is connected with the second output end of the second control chip;
the output end of the switcher connecting component is connected with the input end of the optical filter switcher;
the switcher connecting component is used for receiving the processed switcher driving signal through a first input end and a second input end of the switcher connecting component and outputting the processed switcher driving signal to the input end of the optical filter switcher through an output end of the switcher connecting component;
the output end of the switcher connecting component is matched with the input end of the optical filter switcher, so that the optical filter switcher switches the optical filter according to the processed switcher driving signal.
8. The system according to any one of claims 5 to 7, further comprising: a light source for light supplement;
the first controller is configured to generate a light source driving signal when the shooting mode is the night mode, and drive the light supplement light source to be turned on according to the light source driving signal, so as to improve the illumination intensity of the shooting environment.
9. The system of claim 8, further comprising: a light source heat sink;
the first controller is used for generating a radiator driving signal when the shooting mode is the night mode, and driving the light source radiator to be started according to the radiator driving signal.
10. The system of claim 9, further comprising: a switching circuit and a power supply;
the input end of the switch circuit is connected with the power supply and the second output end of the first controller, and the output end of the switch circuit is connected with the light source radiator;
the power supply is used for supplying power to the switch circuit so as to enable the switch circuit to be conducted;
the first controller is used for outputting the radiator driving signal to the light source radiator through the switch circuit in a conducting state so as to normally open the light source radiator.
11. The system according to claim 10, wherein the switching circuit comprises in particular: a first field effect transistor and a second field effect transistor;
the grid electrode of the first field effect tube is connected with the second output end of the first controller, the source electrode of the first field effect tube is connected with a power supply, and the drain electrode of the first field effect tube is connected with the light source radiator;
the grid electrode of the second field effect tube is connected with the grid electrode of the first field effect tube, the source electrode of the second field effect tube is connected with the source electrode of the first field effect tube, and the drain electrode of the second field effect tube is connected with the drain electrode of the first field effect tube;
the power supply is used for supplying power to the first field effect transistor and the second field effect transistor so as to enable the first field effect transistor and the second field effect transistor to be conducted;
the first controller is used for outputting the radiator driving signal to the light source radiator through the first field effect tube and the second field effect tube which are in a conducting state, so that the light source radiator is normally opened.
12. The system of claim 11, further comprising: a radiator connecting assembly;
the input end of the radiator connecting assembly is connected with the drain electrode of the first field effect transistor, and the output end of the radiator connecting assembly is connected with the input end of the light source radiator;
the radiator connecting assembly is used for receiving the radiator driving signal through an input end of the radiator connecting assembly and outputting the radiator driving signal to the light source radiator through an output end of the radiator connecting assembly;
the output end of the radiator connecting assembly is matched with the input end of the light source radiator, so that the light source radiator is normally opened.
13. The system according to claim 11 or 12, characterized in that the system further comprises: a voltage conversion circuit;
the input end of the voltage conversion circuit is connected with the power supply, and the output end of the voltage conversion circuit is connected with the source electrode of the second field effect transistor;
the voltage conversion circuit is used for adjusting 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.
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