CN214846177U - Flash lamp color temperature control circuit and flash lamp equipment - Google Patents
Flash lamp color temperature control circuit and flash lamp equipment Download PDFInfo
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- CN214846177U CN214846177U CN202120371819.4U CN202120371819U CN214846177U CN 214846177 U CN214846177 U CN 214846177U CN 202120371819 U CN202120371819 U CN 202120371819U CN 214846177 U CN214846177 U CN 214846177U
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 26
- 238000004146 energy storage Methods 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 description 10
- 229910052724 xenon Inorganic materials 0.000 description 6
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- 230000005540 biological transmission Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
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Abstract
The application provides a flash lamp color temperature control circuit and flash lamp equipment. The flash lamp color temperature control circuit comprises a power supply circuit, a trigger circuit and a control unit. The power supply circuit is provided with a first controlled end and an electric energy output end; the electric energy output end is electrically connected with a light-emitting unit of the flash lamp so as to supply power to the light-emitting unit according to the voltage regulating signal; the power supply circuit is connected with the light-emitting unit in series to form a power supply loop; the trigger circuit is provided with a second controlled end and a trigger control end; the trigger control end is electrically connected with the power supply loop so as to adjust the duration of the flash of the light-emitting unit according to the on-off control signal; the control unit is electrically connected with the first controlled end and the second controlled end, and the luminous color temperature of the luminous unit is adjusted by sending a voltage adjusting signal to the first controlled end and sending an on-off control signal to the second controlled end. The application can improve the flexibility of adjusting the color temperature of the flash lamp.
Description
Technical Field
The application relates to the field of photographic equipment, in particular to a flash lamp color temperature control circuit and flash lamp equipment.
Background
With the development of mobile communication technology, mobile terminals play an increasingly important role in the life and work of people. Especially, some mobile terminal devices with camera function, such as mobile phone, MP4, PDA, notebook computer, etc., the camera function of these mobile terminals brings great fun to people's life. The mobile terminal with the photographing function needs a light source, and needs artificial light to assist photographing except natural light, so that the artificial light source of the mobile terminal with the photographing function cannot meet the actual use requirement, and people often use an external flash lamp to assist photographing.
However, the color temperature adjustment of the external flash lamp generally has only a few fixed gears, is inflexible, and cannot meet the requirement of the emission color temperature of the external flash lamp in diversified shooting environments.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
An object of the present application is to provide a flash lamp color temperature control circuit to improve the flexibility of flash lamp color temperature adjustment.
In order to solve the technical problem, the following technical scheme is adopted in the application:
a flash color temperature control circuit comprising:
the power supply circuit is provided with a first controlled end and an electric energy output end; the first controlled end is used for receiving a voltage regulating signal; the electric energy output end is electrically connected with a light-emitting unit of the flash lamp so as to supply power to the light-emitting unit according to the voltage regulating signal; the power supply circuit is connected with the light-emitting unit in series to form a power supply loop;
the trigger circuit is provided with a second controlled end and a trigger control end; the second controlled end is used for receiving an on-off control signal, and the trigger control end is electrically connected with the power supply loop so as to adjust the duration of the flash of the light-emitting unit according to the on-off control signal;
and the control unit is electrically connected with the first controlled end and the second controlled end, and is used for adjusting the luminous color temperature of the luminous unit by sending the voltage adjusting signal to the first controlled end and sending the on-off control signal to the second controlled end.
According to an embodiment of the present application, the control unit includes a main control circuit having a first control terminal and a second control terminal;
the first control end is electrically connected with the first controlled end and is used for sending the voltage adjusting signal to the first controlled end;
the second control end is electrically connected with the second controlled end and used for sending the on-off control signal to the second controlled end.
According to an embodiment of the present application, the control unit includes a first control circuit and a second control circuit;
the first control circuit is electrically connected with the first controlled end and is used for sending the voltage adjusting signal to the first controlled end;
the second control circuit is electrically connected with the second controlled end and used for sending the on-off control signal to the second controlled end.
According to an embodiment of the present application, the power supply circuit includes a voltage regulation circuit and a tank circuit connected in series;
the input end of the voltage regulating circuit is connected with a power supply, and the output end of the voltage regulating circuit is connected with the energy storage circuit; the controlled end of the voltage regulating circuit is connected with the control unit so as to output a specific voltage under the control of the control unit;
the energy storage circuit is used for connecting the light-emitting unit, stores the electric energy output by the voltage regulating circuit, and the output voltage of the energy storage circuit is greater than or equal to the light-emitting trigger voltage of the light-emitting unit.
According to an embodiment of the application, the voltage regulating circuit comprises a forward circuit or a flyback circuit, a transformer is arranged in the forward circuit or the flyback circuit, a primary winding of the transformer supplies power to be connected with the power supply, and a secondary winding of the transformer is connected with the energy storage circuit.
According to an embodiment of the present application, the trigger circuit includes a switching circuit; the controlled end of the switch circuit is connected with the control unit, and the first end and the second end of the switch circuit are connected in the power supply loop in series;
the control unit controls the on-off of the power supply loop by controlling the on-off of the switch circuit.
According to an embodiment of the application, the on-off control signal is a PWM signal, and the control unit regulates and controls the duration of the flash of the light emitting unit by regulating the duty ratio of the on-off control signal.
According to an embodiment of the present application, the control unit further includes a storage circuit, where the storage circuit stores a corresponding relationship between the emission color temperature and the control parameter; the control parameters comprise power supply voltage information of the light-emitting unit and flash duration information of the light-emitting unit;
and the control unit generates the voltage regulation signal and the on-off control signal according to the corresponding relation between the luminous color temperature and the control parameter and the target luminous color temperature to be achieved.
According to an embodiment of the present application, the control unit further includes a storage circuit, where the storage circuit stores a correspondence between a light-emitting color temperature, a flash power, and a control parameter; the control parameters comprise power supply voltage information of the light-emitting unit and flash duration information of the light-emitting unit;
and the control unit generates the voltage regulation signal and the on-off control signal according to the corresponding relation between the luminous color temperature, the flash power and the control parameter and the target luminous color temperature and the target flash power to be achieved.
According to another aspect of the present application, there is also provided a flash device including a light emitting unit and a flash color temperature control circuit;
the flash lamp color temperature control circuit is electrically connected with the light-emitting unit and used for adjusting the light-emitting color temperature of the light-emitting unit.
In this application, the control unit is connected power supply circuit's first controlled end and trigger circuit's second controlled end simultaneously electricity, and the control unit is through sending voltage regulation signal to first controlled end, and power supply circuit adjusts the output voltage of electric energy output end according to voltage regulation signal to the realization is to the regulation of flash lamp luminous colour temperature. The control circuit sends an on-off control signal to the second controlled end, and the trigger circuit adjusts the duration of the flash of the light-emitting unit according to the on-off control signal, so as to adjust the light-emitting color temperature of the light-emitting unit. Therefore, the flexibility of color temperature adjustment is improved by adjusting the supply voltage and the flash duration of the light-emitting voltage.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a block diagram of a circuit configuration of a flash color temperature control circuit according to an embodiment.
Fig. 2 is a block diagram of a circuit configuration of a flash color temperature control circuit according to another embodiment.
Detailed Description
While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.
Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the application and does not imply that every embodiment of the application must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
In the embodiments shown in the drawings, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement of the various elements of the present application not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
The preferred embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the present specification.
The embodiment of the present application provides a flash lamp color temperature control circuit, which is used for regulating and controlling the light emitting color temperature of a flash lamp light emitting unit 10. Referring to fig. 1, fig. 1 is a block diagram of a circuit structure of a color temperature control circuit of a flash according to an embodiment.
Here, the flash color temperature control circuit includes a power supply circuit 10, a trigger circuit 20, and a control unit 30. The power supply circuit 10 has a first controlled end and an electric energy output end; the first controlled end is used for receiving a voltage regulating signal; the electric energy output end is electrically connected with the light-emitting unit 10 of the flash lamp so as to supply power to the light-emitting unit 10 according to the voltage regulation signal; the power supply circuit 10 and the light emitting unit 10 are connected in series to form a power supply loop; the trigger circuit 20 has a second controlled terminal and a trigger control terminal; the second controlled end is used for receiving the on-off control signal, and the trigger control end is electrically connected with the power supply loop so as to adjust the flash duration of the light-emitting unit 10 according to the on-off control signal; the control unit 30 is electrically connected to the first controlled terminal and the second controlled terminal, and adjusts the color temperature of the light emitting unit 10 by sending a voltage adjustment signal to the first controlled terminal and sending an on-off control signal to the second controlled terminal.
Here, the specific structure of the light emitting unit 10 is not limited. In one embodiment, the light emitting unit 10 includes a xenon lamp tube. The lighting unit 10 typically has a trigger coil therein. The lighting unit 10 is powered by applying a supply voltage across the trigger coil.
In one example, the lighting unit 10 has xenon in the lamp tube, and when the voltage applied to the trigger coil is higher than the trigger voltage, the xenon strikes the xenon in the lamp tube strongly, and the xenon emits strong light, so that the lighting unit 10 flashes.
The power output end of the power supply circuit 10 and the trigger coil of the light emitting unit 10 form a power supply loop, and when the power supply loop is turned on, the power supply voltage output by the power output end of the power supply circuit 10 is applied to the light emitting unit 10, so that the light emitting unit 10 emits light. The higher the supply voltage of the light-emitting unit 10, the higher its light-emitting color temperature.
Referring to fig. 2, fig. 2 is a block diagram of a circuit structure of a color temperature control circuit of a flash according to another embodiment. In one embodiment, the power supply circuit 10 includes a voltage regulating circuit 11 and a tank circuit 12 connected in series; the input end of the voltage regulating circuit 11 is connected with a power supply, and the output end of the voltage regulating circuit 11 is connected with the energy storage circuit 12; the controlled end of the voltage regulating circuit 11 is connected with the control unit 30 to output a specific voltage under the control of the control unit 30; the energy storage circuit 12 is connected to the light emitting unit 10, the energy storage circuit 12 stores the electric energy output by the voltage adjusting circuit 11, and the output voltage of the energy storage circuit 12 is greater than or equal to the trigger voltage of the light emitting unit 10.
The power supply may be external here or may be a battery in the flashlight. The voltage regulating circuit 11 may be a step-down circuit or a step-up circuit in this case, depending on the supply voltage. The voltage reduction circuit may be a BUCK circuit, or a charge pump circuit. The BOOST circuit may be a BOOST circuit.
In one example, the voltage regulating circuit 11 includes a forward circuit or a flyback circuit, in which a transformer and a control switch are provided, a primary winding of the transformer is connected to the power supply, and a secondary winding of the transformer is connected to the energy storage circuit 12. The control switch is connected in series with the primary winding and is switched on and off by the control unit 30.
Taking the forward circuit as an example, the primary winding of the transformer in the positive circuit may be directly connected to an ac power supply, or may be connected to a dc power supply through an inverter circuit. Since the lighting unit 10 requires a higher supply voltage to trigger the xenon lighting. And therefore its power safety needs to be considered. In this embodiment, the forward circuit utilizes the transformer to realize the voltage conversion function, and the isolation function of the transformer is used, so that the input end and the output end of the voltage regulating circuit 11 in this embodiment have better isolation performance, thereby improving the safety of the input side and the control circuit of the voltage regulating circuit 11.
The trigger circuit 20 is electrically connected to the power supply circuit. In one example, the trigger circuit 20 may be connected to the light emitting unit 10, and when the trigger unit sends a trigger signal, some structure inside the light emitting unit 10 operates to turn on the power supply circuit, so that the light emitting unit 10 emits light. In another example, the trigger circuit 20 includes a switching circuit; the controlled end of the switching circuit is connected with the control unit 30, and the first end and the second end of the switching circuit are connected in series in the power supply loop; the control unit 30 controls the on/off of the power supply loop by controlling the on/off of the switch circuit.
The switching circuit may include one or more switching tubes, and if there are a plurality of switching tubes, the switching tubes may be connected in parallel or in series to increase the switchable power. The switch tube body can be MOS tube or IGBT. Taking the IGBT as an example, the gate of the IGBT is the controlled terminal, the base of the IGBT is the controlled terminal, the emitter is the second terminal, and the collector is the first terminal.
Therefore, when the switching circuit is turned off, the power supply circuit is cut off, and the light emitting unit 10 is turned off; when the switching circuit is turned on, the power supply circuit is turned on, and the light emitting unit 10 flashes. The longer the duration of flashing of the light-emitting unit 10, the lower the luminous color temperature of the light it emits. The shorter the duration of flashing of the light-emitting unit 10, the higher the emission color temperature of the light it emits. The flash duration here may refer to a duration of the flash in one flash-off period of the light emitting unit 10. Of course, if the flash-off period is too short, the human eye cannot recognize the off state of the light emitting unit 10.
Here, the on-off control signal sent by the control unit 30 may be a PWM signal, and the control unit 30 adjusts and controls the duration of the flash of the light emitting unit 10 by adjusting the duty ratio of the on-off control signal. Here, the switching tube in the switching circuit can be turned on and off at a high on-off frequency to the extent that the human eye cannot feel, and the light-emitting color temperature of the light-emitting unit 10 is regulated and controlled by adjusting the on-time/duty ratio in the on-off period of the switching tube.
The control unit 30 is electrically connected to the first controlled end of the power supply circuit 10 and the second controlled end of the trigger circuit 20, the control unit 30 sends a voltage regulation signal to the first controlled end, and the power supply circuit 10 regulates the output voltage of the power output end according to the voltage regulation signal, so as to regulate the luminous color temperature of the flash lamp. The control circuit sends an on-off control signal to the second controlled end, and the trigger circuit 20 adjusts the duration of the flash of the light-emitting unit 10 according to the on-off control signal, so as to adjust the color temperature of the light emitted by the light-emitting unit 10. Therefore, the adjustment range of the luminous color temperature and the fineness of the regulation of the luminous color temperature are increased by adjusting the power supply voltage and the flash duration of the luminous voltage.
For example, when a certain luminous color temperature value needs to be adjusted, the power supply voltage of the light emitting unit 10 may be adjusted for coarse adjustment, and then the duration of the flash of the light emitting unit 10 may be adjusted for fine adjustment, thereby improving the fineness of the adjustment of the luminous color temperature.
In one embodiment, the control unit 30 includes a main control circuit having a first control terminal and a second control terminal; the first control end is electrically connected with the first controlled end and used for sending a voltage regulation signal to the first controlled end; the second control end is electrically connected with the second controlled end and used for sending on-off control signals to the second controlled end.
The main control circuit can be a single chip microcomputer, an MCU, a CPU or a main control board. The power supply circuit 10 and the trigger circuit 20 are controlled by one main control circuit, so that the arrangement of communication lines is reduced, the control cooperativity of the power supply circuit 10 and the trigger circuit 20 can be improved, and the stability of the color temperature adjusting process of the flash lamp is improved.
In another embodiment, the control unit 30 includes a first control circuit and a second control circuit; the first control circuit is electrically connected with the first controlled end and used for sending a voltage regulation signal to the first controlled end; the second control circuit is electrically connected with the second controlled end and used for sending on-off control signals to the second controlled end.
Here, the first control circuit may be one of a single chip microcomputer, an MCU, and a CPU. The second control circuit can also be one of a singlechip, an MCU and a CPU. The present embodiment enables separate control of the power supply circuit 10 and the trigger circuit 20, and in case of failure of the first control circuit, the emission color temperature can still be adjusted by the second control circuit by controlling the duration of the flash of the light emitting unit 10. Or in case of failure of the second control circuit, the luminous color temperature can still be adjusted by the first control circuit by controlling the supply voltage of the lighting unit 10. This embodiment thus improves the reliability of the flash color temperature control.
In one embodiment, the flash lamp color temperature control circuit further comprises a storage circuit, and the storage circuit stores the corresponding relation between the control parameter and the luminous color temperature; wherein, the control parameters include power supply voltage information of the light emitting unit 10 and duration information of flashing of the light emitting unit 10; and the controller generates a voltage regulation signal and an on-off control signal according to the corresponding relation between the control parameter and the luminous color temperature and the target luminous color temperature to be achieved.
Here, the flashing duration information of the light emitting unit 10 may specifically include a specific duration of flashing of the light emitting unit 10, and may also include a duty ratio of the on-off control signal.
The storage circuit may comprise a hard disk. The corresponding relation between the control parameter and the luminous color temperature can be embodied in the form of a table or a curve. The corresponding relation between the control parameters and the luminous color temperature can be stored in the storage circuit in a data line transmission and network downloading mode.
In one embodiment, the target emission color temperature may be generated by the flash based on a specific algorithm according to the shooting environment, or may be set by the user. The flashlight can further comprise a human-computer interaction component, such as a key, a touch screen, a voice input component and the like, so that a user can input the target luminous color temperature.
When the control unit 30 obtains the target light-emitting color temperature, the control parameter can be found based on the corresponding relationship between the preset control parameter and the light-emitting color temperature, so as to generate the voltage regulation signal and the on-off control signal. The power supply circuit 10 outputs corresponding voltage according to the voltage adjusting signal, and the trigger circuit 20 controls the duration of the flashing of the light emitting unit 10 according to the on-off control signal, so that the light emitting color temperature value output by the light emitting unit 10 matches the target light emitting color temperature. In the embodiment, the storage circuit is arranged, and the corresponding relation between the control parameter and the luminous color temperature is prestored in the storage circuit, so that the accuracy of matching the target luminous color temperature is improved.
In another embodiment, the flash lamp color temperature control circuit further comprises a storage circuit, wherein the storage circuit stores the corresponding relation between the luminous color temperature, the flash power and the control parameter; wherein, the control parameter includes power supply voltage information of the light emitting unit 10 and duration information of flashing of the light emitting unit 10; and the controller generates a voltage regulation signal and an on-off control signal according to the corresponding relation between the luminous color temperature, the flash power and the control parameter and the target luminous color temperature and the target flash power to be achieved.
Specifically, the correspondence between the emission color temperature, the flash power and the control parameter may be embodied in the form of a table or a curve. The data can be embodied in the form of tables and curves, and can be stored in a storage circuit in a data line transmission and network downloading mode.
When the control unit 30 obtains the target light-emitting color temperature and the target flash power, the control parameter can be found based on the preset light-emitting color temperature, the preset flash power and the preset control parameter, so as to generate the voltage regulation signal and the on-off control signal. The power supply circuit 10 outputs corresponding voltage according to the voltage adjusting signal, and the trigger circuit 20 controls the duration of the flashing of the light emitting unit 10 according to the on-off control signal, so that the value of the color temperature of the light emitted by the light emitting unit 10 matches the color temperature of the target light, and the power of the flashing of the light emitting unit 10 matches the power of the target. In the embodiment, the storage circuit is arranged, and the corresponding relation between the control parameter and the luminous color temperature is prestored in the storage circuit, so that the accuracy of matching the target luminous color temperature is improved.
In this embodiment, the flash power is controlled at the same time to further improve the accuracy of the color temperature control. The flash power affects the brightness of the light emitting unit 10, and thus the accuracy of color temperature control can be improved by adjusting the flash emission color temperature in conjunction with the brightness of the light emitting unit 10.
Here, a process of generating the correspondence relationship between the emission color temperature, the flash power, and the control parameter will be described as an example.
In one embodiment, the flash lamp color temperature control circuit further comprises a color temperature sampling circuit; the color temperature sampling circuit is used for electrically connecting the color temperature detection device so as to sample the luminous color temperature of the luminous unit 10 detected by the color temperature detection device; the color temperature sampling circuit is electrically connected to the control unit 30.
The control unit 30 controls the power supply circuit 10 and the trigger circuit 20 according to a specific control parameter. Specifically, the power supply circuit 10 outputs a specific power supply voltage, and the trigger circuit 20 controls the flashing of the light emitting unit 10 for a specific duration. The control unit 30 generates the correspondence between the specific control parameter and the emission color temperature according to the acquired color temperature value of the color temperature sampling circuit. And continuously transforming the control parameters, and circulating the process of determining the corresponding relation, namely forming a color temperature control database.
Here, the emission color temperature detection means may be an emission color temperature sensor.
In another embodiment, the flash color temperature control circuit further comprises a power detection circuit; the power detection circuit is electrically connected with the power supply circuit 10 and is used for detecting the flash power of the light emitting unit 10; the control circuit is electrically connected with the power detection circuit to obtain the flash power. The power detection circuit may include a voltage detection circuit and a current detection circuit to correspondingly detect the voltage and current of the light emitting unit 10.
The control unit 30 controls the power supply circuit 10 and the trigger circuit 20 according to a specific control parameter. Specifically, the power supply circuit 10 outputs a specific power supply voltage, and the control trigger circuit 20 controls the flashing of the light emitting unit 10 for a specific duration. The control unit 30 generates the corresponding relationship between the specific control parameter and the emission color temperature and the flash power of the light emitting unit 10 according to the emission color temperature value acquired by the color temperature sampling circuit and the flash power detected by the power detection circuit. And continuously transforming the control parameters, and circulating the process of determining the corresponding relation, namely forming a color temperature control database.
According to another aspect of the present application, there is also provided a flash device including a light emitting unit 10 and a flash color temperature control circuit; the flash color temperature control circuit is electrically connected to the light emitting unit 10 for adjusting the emission color temperature of the light emitting unit 10. For the specific embodiment of the flash lamp color temperature control circuit, please refer to the above.
Claims (10)
1. A flash color temperature control circuit, comprising:
the power supply circuit is provided with a first controlled end and an electric energy output end; the first controlled end is used for receiving a voltage regulating signal; the electric energy output end is electrically connected with a light-emitting unit of the flash lamp so as to supply power to the light-emitting unit according to the voltage regulating signal; the power supply circuit is connected with the light-emitting unit in series to form a power supply loop;
the trigger circuit is provided with a second controlled end and a trigger control end; the second controlled end is used for receiving an on-off control signal, and the trigger control end is electrically connected with the power supply loop so as to adjust the duration of the flash of the light-emitting unit according to the on-off control signal;
and the control unit is electrically connected with the first controlled end and the second controlled end, and is used for adjusting the luminous color temperature of the luminous unit by sending the voltage adjusting signal to the first controlled end and sending the on-off control signal to the second controlled end.
2. The flash light color temperature control circuit of claim 1, wherein the control unit comprises a main control circuit having a first control terminal and a second control terminal;
the first control end is electrically connected with the first controlled end and is used for sending the voltage adjusting signal to the first controlled end;
the second control end is electrically connected with the second controlled end and used for sending the on-off control signal to the second controlled end.
3. The flash color temperature control circuit of claim 1, wherein the control unit comprises a first control circuit and a second control circuit;
the first control circuit is electrically connected with the first controlled end and is used for sending the voltage adjusting signal to the first controlled end;
the second control circuit is electrically connected with the second controlled end and used for sending the on-off control signal to the second controlled end.
4. The flash light color temperature control circuit of claim 1, wherein the power supply circuit comprises a voltage regulation circuit and a tank circuit connected in series;
the input end of the voltage regulating circuit is connected with a power supply, and the output end of the voltage regulating circuit is connected with the energy storage circuit; the controlled end of the voltage regulating circuit is connected with the control unit so as to output a specific voltage under the control of the control unit;
the energy storage circuit is used for connecting the light-emitting unit, stores the electric energy output by the voltage regulating circuit, and the output voltage of the energy storage circuit is greater than or equal to the light-emitting trigger voltage of the light-emitting unit.
5. The flash lamp color temperature control circuit of claim 4, wherein the voltage regulation circuit comprises a forward circuit or a flyback circuit, the forward circuit or the flyback circuit has a transformer therein, a primary winding of the transformer is connected with the power supply, and a secondary winding of the transformer is connected with the energy storage circuit.
6. The flash light color temperature control circuit of claim 1, wherein the trigger circuit comprises a switch circuit; the controlled end of the switch circuit is connected with the control unit, and the first end and the second end of the switch circuit are connected in the power supply loop in series;
the control unit controls the on-off of the power supply loop by controlling the on-off of the switch circuit.
7. The flash lamp color temperature control circuit according to claim 1, wherein the on-off control signal is a PWM signal, and the control unit adjusts and controls the duration of the flash of the light emitting unit by adjusting a duty ratio of the on-off control signal.
8. The flash lamp color temperature control circuit according to any one of claims 1 to 7, wherein the control unit further comprises a storage circuit, and the storage circuit stores a correspondence relationship between the emission color temperature and the control parameter; the control parameters comprise power supply voltage information of the light-emitting unit and flash duration information of the light-emitting unit;
and the control unit generates the voltage regulation signal and the on-off control signal according to the corresponding relation between the luminous color temperature and the control parameter and the target luminous color temperature to be achieved.
9. The flash lamp color temperature control circuit according to any one of claims 1 to 7, wherein the control unit further comprises a storage circuit, and the storage circuit stores the corresponding relation between the emission color temperature, the flash power and the control parameter; the control parameters comprise power supply voltage information of the light-emitting unit and flash duration information of the light-emitting unit;
and the control unit generates the voltage regulation signal and the on-off control signal according to the corresponding relation between the luminous color temperature, the flash power and the control parameter and the target luminous color temperature and the target flash power to be achieved.
10. A flash device characterized by comprising a light emitting unit and the flash color temperature control circuit according to any one of claims 1 to 9;
the flash lamp color temperature control circuit is electrically connected with the light-emitting unit and used for adjusting the light-emitting color temperature of the light-emitting unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371819.4U CN214846177U (en) | 2021-02-10 | 2021-02-10 | Flash lamp color temperature control circuit and flash lamp equipment |
| PCT/CN2021/085357 WO2022170673A1 (en) | 2021-02-10 | 2021-04-02 | Flash-lamp color temperature control circuit, flash-lamp color temperature control method, flash-lamp color temperature control apparatus, electronic device and computer storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371819.4U CN214846177U (en) | 2021-02-10 | 2021-02-10 | Flash lamp color temperature control circuit and flash lamp equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214846177U true CN214846177U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120371819.4U Active CN214846177U (en) | 2021-02-10 | 2021-02-10 | Flash lamp color temperature control circuit and flash lamp equipment |
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|---|---|
| CN (1) | CN214846177U (en) |
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2021
- 2021-02-10 CN CN202120371819.4U patent/CN214846177U/en active Active
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