CN118215179B - Dual-signal light supplementing synchronous circuit and electronic equipment thereof - Google Patents
Dual-signal light supplementing synchronous circuit and electronic equipment thereof Download PDFInfo
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- CN118215179B CN118215179B CN202410612100.3A CN202410612100A CN118215179B CN 118215179 B CN118215179 B CN 118215179B CN 202410612100 A CN202410612100 A CN 202410612100A CN 118215179 B CN118215179 B CN 118215179B
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 75
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 40
- 230000003287 optical effect Effects 0.000 claims abstract description 54
- 238000012216 screening Methods 0.000 claims abstract description 41
- 230000000087 stabilizing effect Effects 0.000 claims description 40
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000009172 bursting Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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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
- H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
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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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
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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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/12—Controlling the intensity of the light using optical feedback
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Stroboscope Apparatuses (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a double-signal light supplementing synchronous circuit and electronic equipment thereof, and relates to the field of intelligent light supplementing devices; the camera is connected with the light supplementing device; the double-signal light supplementing synchronous circuit comprises: an input signal module; the input signal module comprises a first signal circuit, a second signal circuit and a switching tube module; the first signal circuit comprises a first optocoupler and a first resistor; the second signal circuit comprises a second optocoupler and a second resistor; one end of the switching tube module is connected with the first end of the first optical coupler; the other end of the switching tube module is connected with the first end of the second optical coupler; a screening module; the screening module receives an input signal of the input signal module and screens based on the input signal; a comparator module; the comparator module receives the output signal of the screening module and outputs a high level or a low level. The invention reduces the number of wires and improves the stability by integrating two signals into the same interface.
Description
Technical Field
The invention relates to the field of commercial/security and intelligent traffic light supplementing devices, in particular to a double-signal light supplementing synchronous circuit and electronic equipment thereof.
Background
In the prior art, a camera is provided with a plurality of light supplementing devices, and each light supplementing device needs a plurality of types of synchronous signals, such as a stroboscopic signal, a bursting signal and the like, and a plurality of cables are connected in the case.
However, more cables are connected, so that more signal interfaces are required to be reserved for the video camera, wiring is inconvenient, signal line interference exists, and the cable is high in cost and can raise material cost.
Disclosure of Invention
In order to solve the problems, the invention provides a double-signal light supplementing synchronous circuit which is connected with a camera and a light supplementing device; the double-signal light supplementing synchronous circuit comprises:
An input signal module; the input signal module comprises a first signal circuit, a second signal circuit and a switching tube module; the first signal circuit comprises a first optocoupler and a first resistor; one end of the first resistor is connected with the first end of the first optocoupler, and the other end of the first resistor is connected with a first signal input; the second signal circuit comprises a second optocoupler and a second resistor; one end of the second resistor is connected with the first end of the second optocoupler, and the other end of the second resistor is connected with a second signal input; one end of the switching tube module is connected with the first end of the first optical coupler; the other end of the switching tube module is connected with the first end of the second optical coupler; the second end of the first optical coupler is grounded, and the fourth end of the first optical coupler is connected with a first power supply; the second end of the second optical coupler is grounded, and the fourth end of the second optical coupler is connected with a second power supply; the switch tube module comprises a switch tube and a third resistor; the first end of the switching tube is connected with the first end of the first optocoupler, and the second end of the switching tube is connected with one end of the third resistor; one end of the third resistor is connected with the second signal input; the other end of the third resistor and the third end of the switch tube are grounded;
A screening module; the screening module receives the output signal of the input signal module and screens based on the output signal; the screening module comprises a third optocoupler, a fifth resistor and a sixth resistor; the first end of the third optical coupler is connected with the input signal module through the fifth resistor, the second end and the third end of the third optical coupler are grounded, and the fourth end of the third optical coupler is connected with a third power supply through the sixth resistor;
A comparator module; the comparator module receives an output signal of the screening module and outputs a high level or a low level based on the output signal; the comparator module comprises a first comparator, a second comparator, a seventh resistor, an eighth resistor and a ninth resistor; the positive terminal of the first comparator is connected with the fourth terminal of the third optocoupler; the positive electrode end of the first comparator is connected with the positive electrode end of the second comparator; the negative electrode end of the first comparator is connected with a fourth power supply through a seventh resistor; the third end of the first comparator is connected with a fifth power supply; a fourth end of the first comparator is grounded; the output end of the first comparator is connected with the negative electrode end of the second comparator through an eighth resistor; the output end of the second comparator is connected with the light supplementing device; one end of the ninth resistor is connected with one side, close to the second comparator, of the eighth resistor, and the other end of the ninth resistor is grounded.
The double-signal light supplementing synchronous circuit further comprises a voltage stabilizing circuit; the input signal module is connected with the screening module through the voltage stabilizing circuit; the third end of the first optical coupler is connected with the voltage stabilizing circuit, and the third end of the second optical coupler is connected with the voltage stabilizing circuit; the third end of the first optical coupler is connected with the third end of the second optical coupler; the voltage stabilizing circuit comprises a fourth resistor and a first voltage stabilizing element; one end of the fourth resistor is connected with the third end of the first optocoupler, one end of the first voltage stabilizing element is connected with the third end of the first optocoupler, and the other end of the fourth resistor and the other end of the first voltage stabilizing element are grounded.
The screening module further comprises a second voltage stabilizing element, one end of the second voltage stabilizing element is connected with one end of the fifth resistor, which is far away from the third optocoupler, and the other end of the second voltage stabilizing element is grounded.
Wherein the comparator module further comprises a protection circuit; the protection circuit comprises a first capacitor and a tenth resistor; one end of the first capacitor is connected with one side of the seventh resistor, which is close to the first comparator, and the other end of the first capacitor is grounded; one end of the tenth resistor is connected with one side, close to the first comparator, of the seventh resistor, and the other end of the tenth resistor is grounded.
The application also provides an electronic device, comprising:
the dual signal light supplementing synchronization circuit of any one of the above;
the camera is connected with the double-signal light supplementing synchronous circuit and inputs signals to the double-signal light supplementing synchronous circuit;
And the light supplementing device receives the output signal of the double-signal light supplementing synchronous circuit and performs light supplementing operation according to the output signal.
The light supplementing device performs light supplementing operation according to the synchronous signals sent by the camera; the synchronization signal level will affect the transmission of the synchronization signal:
s11: when the synchronous signal is a stroboscopic signal, the first optical coupler works normally, and the synchronous signal transmits the stroboscopic signal with the amplitude of the first power supply voltage to the screening module through the first optical coupler;
s12: the first power supply voltage enables the third optocoupler to be fully conducted; the signal output by the third optocoupler is of low level;
s13: the low level signal is transmitted to the positive terminal of the first comparator and the negative terminal of the second comparator; the first comparator compares the potential difference of the positive electrode end and the negative electrode end, and the output end of the first comparator outputs a low-level signal;
S14: the second comparator compares the voltages of the positive end of the second comparator and the negative end of the second comparator, and the second comparator outputs a high-level signal to the light supplementing device;
s21: when the synchronous signal is a burst signal; the second optocoupler is communicated with the switching tube; at this time, the first optocoupler does not work; the synchronous signal transmits a bursting signal with the amplitude of a second power supply voltage to the screening module through the second optocoupler;
s22: the second power supply voltage enables the third optocoupler to be in an incomplete conduction state; the signal output by the third optocoupler is a voltage division level;
S23: the divided voltage level is transmitted to the positive terminal of the first comparator and the negative terminal of the second comparator; the first comparator compares voltages of the positive terminal and the negative terminal; the output end of the first comparator outputs a high-level signal;
S24: the second comparator compares voltages of a positive terminal of the second comparator and a negative terminal of the second comparator, and the second comparator outputs a low-level signal to the light supplementing device.
The invention has the beneficial effects that: different from the prior art, the double-signal light supplementing synchronous circuit is connected with a camera and a light supplementing device; the double-signal light supplementing synchronous circuit comprises: an input signal module; the input signal module comprises a first signal circuit, a second signal circuit and a switching tube module; the first signal circuit comprises a first optocoupler and a first resistor; the second signal circuit comprises a second optocoupler and a second resistor; one end of the switching tube module is connected with the first end of the first optical coupler; the other end of the switching tube module is connected with the first end of the second optical coupler; a screening module; the screening module receives an input signal of the input signal module and screens based on the input signal; a comparator module; the comparator module receives the output signal of the screening module and outputs a high level or a low level. The invention reduces the number of wires and improves the stability by integrating two signals into the same interface.
Drawings
FIG. 1 is a schematic diagram of a dual-signal light-compensating synchronization circuit according to a first embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a first embodiment of the input signal module shown in FIG. 1;
FIG. 3 is a schematic circuit diagram of a first embodiment of the screening module of FIG. 1;
FIG. 4 is a schematic circuit diagram of a first embodiment of the comparator module of FIG. 1;
FIG. 5 is a flow chart of a camera sending out strobe signals;
fig. 6 is a schematic flow chart of the video camera sending out the burst signal.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of an embodiment of a dual-signal light-compensating synchronization circuit according to the present invention; fig. 2 is a schematic circuit diagram of a first embodiment of the input signal module in fig. 1.
The double-signal light supplementing synchronous circuit of the embodiment is connected with the camera and the light supplementing device; the camera can be a spherical camera, a hemispherical camera, a gun type camera lamp and the like; the light supplementing device can be a stroboscopic lamp, an explosion lamp, a normally-on lamp and the like; the double-signal light supplementing synchronous circuit comprises an input information module, a screening module and a comparator module.
The input signal module comprises a first signal circuit, a second signal circuit and a switching tube module; different signals output by the camera can be transmitted to the light supplementing device through different signal circuits; for example, the strobe signal is transmitted through a first signal circuit, and the burst signal is transmitted through a second signal circuit;
The first signal circuit comprises a first optocoupler U1 and a first resistor R1; one end of a first resistor R1 is connected with a first end U11 of the first optical coupler, and the other end of the first resistor R1 is connected with a first signal input; i.e. the first signal is transmitted to the first end U11 of the first optocoupler via the first resistor R1; the first resistor R1 is a pull-up resistor of the first optical coupler U1, so that the resistance of the first optical coupler U1 to static electricity can be enhanced; the second signal circuit comprises a second optocoupler U2 and a second resistor R2; one end of the second resistor R2 is connected with the first end U21 of the second optocoupler, and the other end of the second resistor R2 is connected with a second signal input; namely, the second signal is transmitted to the first end U21 of the second optocoupler through the second resistor R2; likewise, the second resistor R2 is a pull-up resistor of the second optocoupler U2, which can enhance the resistance of the second optocoupler U2 to static electricity.
Alternatively, in other embodiments, the input signal module may also include three or more signal circuits;
the switching tube module is connected with the first signal circuit and the second signal circuit; one end of the switching tube module is connected with the first end U11 of the first optical coupler, and the other end of the switching tube module is connected with the first end U21 of the second optical coupler; the switching tube module can prevent the signal transmitted by the first signal circuit from being transmitted to the second signal circuit, and can also prevent the signal transmitted by the second signal circuit from being transmitted to the first signal circuit; when the camera transmits a first signal, the first signal circuit works normally, and the switching tube module controls the second signal circuit to not work;
The screening module is connected with the input signal module, receives the output signal of the input signal module and screens based on the output signal; that is, the screening module may screen based on the output signal of the input signal module receiving the first signal or the second signal;
The comparator module is connected with the screening module, receives the output signal of the screening module, and outputs high level or low level to the light supplementing device based on the output signal; the light supplementing device further executes corresponding light supplementing operation; for example, when the camera transmits a stroboscopic signal, the comparator module outputs the stroboscopic signal, and when the light supplementing device receives the stroboscopic signal, the LED lamp is controlled to emit light in a stroboscopic mode; when the camera transmits the burst signal, the comparator module outputs the burst signal, and when the light supplementing device receives the burst signal, the LED lamp is controlled to burst and emit light.
In summary, the dual-signal light-compensating synchronization circuit of the present application includes: an input signal module; the input signal module comprises a first signal circuit, a second signal circuit and a switching tube module; the first signal circuit comprises a first optocoupler U1 and a first resistor R1; the second signal circuit comprises a second optocoupler U2 and a second resistor R2; one end of the switch tube module is connected with a first end U11 of the first optical coupler; the other end of the switch tube module is connected with a first end U21 of the second optical coupler; a screening module; the screening module receives the output signal of the input signal module and screens based on the output signal; a comparator module; the comparator module receives the output signal of the screening module and outputs a high level or a low level. The application reduces the number of wires and improves the stability by integrating two signals into the same interface.
The second end U12 of the first optocoupler is grounded, and the fourth end U14 of the first optocoupler is connected with a first power supply V1; the second end U22 of the second optical coupler is grounded, and the fourth end U24 of the second optical coupler is connected with a second power supply V2; in this embodiment, the signal received by the first optocoupler U1 is a 5V strobe signal, and the first power supply is 5V; the signal received by the second optical coupler U2 is a 2.5V explosion signal, and the second power supply is 2.5V;
the optocoupler comprises a light emitting diode and a phototriode; the light emitting diode converts the received signal into an optical signal, and the phototriode converts the optical signal into an electric signal; the optocoupler isolates the input signal from the output signal, so that the stability is improved; optionally, the optocoupler may be a linear optocoupler or a nonlinear optocoupler.
The switch tube module comprises a switch tube Q1 and a third resistor R3; the first end of the switching tube Q1 is connected with the first end U11 of the first optocoupler, and the second end of the switching tube Q1 is connected with one end of the third resistor R3; one end of the third resistor R3 is connected with the second signal input, and the other end of the third resistor R3 and the third end of the switching tube Q1 are grounded; when the camera transmits a first signal, the first signal circuit is conducted; when the camera transmits the second signal, the second signal circuit is turned on, and the switching tube Q1 is turned on at this time, that is, the first signal circuit has no input signal. The double-signal light supplementing synchronous circuit realizes double-signal input and single-signal output through the switching tube, reduces the number of wiring and reduces the material cost.
In this embodiment, the switching tube Q1 is an N-type MOS tube, the first end of the switching tube Q1 is a drain electrode, the second end of the switching tube Q1 is a gate electrode, and the third end of the switching tube Q1 is a source electrode; in other embodiments, the switching transistor Q1 may also be an electronic component such as a triode.
The double-signal light supplementing synchronous circuit also comprises a voltage stabilizing circuit; the input signal module is connected with the screening module through a voltage stabilizing circuit; the third end U13 of the first optical coupler is connected with the voltage stabilizing circuit, and the third end U23 of the second optical coupler is connected with the voltage stabilizing circuit; the third end U13 of the first optical coupler is connected with the third end U23 of the second optical coupler; the signal input by the camera is transmitted to the screening module through the voltage stabilizing circuit after passing through the input signal module, so that the stability of the signal received by the screening module is improved;
the voltage stabilizing circuit comprises a fourth resistor R4 and a first voltage stabilizing element D1; one end of a fourth resistor R4 is connected with a third end U13 of the first optical coupler, and one end of a first voltage stabilizing element D1 is connected with the third end U13 of the first optical coupler; the other end of the fourth resistor R4 and the other end of the first voltage stabilizing element D1 are grounded; in this embodiment, the first voltage stabilizing element D1 is a zener diode; the working principle of forming the voltage stabilizing circuit by connecting the voltage stabilizing element and the resistor in parallel is common knowledge in the art, and is not described herein.
As shown in fig. 3, fig. 3 is a schematic circuit diagram of a first embodiment of the screening module in fig. 1;
The screening module comprises a third optocoupler U3, a fifth resistor R5 and a sixth resistor R6; the first end U31 of the third optocoupler is connected with the input signal module through a fifth resistor R5; namely, an output signal of the input signal module is transmitted to a third optocoupler U3 through a fifth resistor R5; the fifth resistor R5 is a pull-up resistor of the third optocoupler U3 and has the same function as the first resistor R1 and the second resistor R2; the second end U32 and the third end U33 of the third optocoupler are grounded; in this embodiment, the second end U32 of the third optocoupler is grounded, and the third end U33 of the third optocoupler is connected to an equipotential; the equipotential means that there is no potential difference between the second end U32 of the third optocoupler and the third end U33 of the third optocoupler, and the third end U33 is also grounded under the condition that the second end U32 is grounded.
Optionally, the first optocoupler, the second optocoupler, and the third optocoupler may be the same or different optocoupler elements, which are not limited herein.
The fourth end U34 of the third optocoupler is connected with a third power supply V3 through a sixth resistor R6; when the interface receives an output signal of the input signal module, the on state of the third optocoupler U3 can be changed by adjusting the resistance values of the fifth resistor R5 and the sixth resistor R6; the specific implementation mode is as follows:
The interface receives a signal, adjusts the resistance value of the fifth resistor R5, and further changes the voltage of the first end U31 of the third optocoupler; a light emitting diode is connected between the first end U31 of the third optical coupler and the second end U32 of the third optical coupler, and the second end is grounded; the larger the voltage of the first end is, the more obvious the light emitting effect of the light emitting diode is, and the resistance value of the phototriode is reduced; i.e. the larger the first terminal voltage, the smaller the fourth terminal voltage. For example, when the camera sends a strobe signal, the third optocoupler U3 is completely turned on; when the camera sends a burst signal, the third optocoupler is not completely conducted.
The screening module further comprises a second voltage stabilizing element D2, and one end of the second voltage stabilizing element D2 is connected with one side, away from the third optocoupler U3, of the fifth resistor R5; the input signal received by the interface is input into a third optocoupler U3 through a fifth resistor R5 after passing through a second voltage stabilizing element D2; the input signal received by the third optical coupler U3 is more stable; the other end of the second voltage stabilizing element D2 is grounded, and the effects of the second voltage stabilizing element D2 and the first voltage stabilizing element D1 are the same, which is not described herein.
As shown in fig. 4, fig. 4 is a schematic circuit diagram of a first embodiment of the comparator module in fig. 1;
the comparator module comprises a first comparator X1, a second comparator X2, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9; the first end 1 of the first comparator is connected with the fourth end U34 of the third optocoupler; the first end 1 of the first comparator is connected with the first end 11 of the second comparator; that is, the output signal of the third optocoupler U3 is transmitted to the first end 1 of the first comparator and the first end 11 of the second comparator through the fourth end U34 of the third optocoupler; the second end 2 of the first comparator is connected with a fourth power supply V4 through a seventh resistor R7; the third end 3 of the first comparator is connected with a fifth power supply V5; the fifth power supply V5 supplies power to the first comparator X1; the fourth terminal 4 of the first comparator is grounded;
The fifth end 5 of the first comparator is connected with the second end 12 of the second comparator through an eighth resistor R8; the third end 13 of the second comparator is connected with the light supplementing device; one end of the ninth resistor R9 is connected with one side, close to the second comparator X2, of the eighth resistor R8, and the other end of the ninth resistor R9 is grounded; the voltage of the second end 12 of the second comparator can be changed by adjusting the resistance values of the eighth resistor R8 and the ninth resistor R9;
The comparator module further comprises a protection circuit; the protection circuit comprises a first capacitor C1 and a tenth resistor R10; one end of the first capacitor C1 is connected with one side of the seventh resistor R7, which is close to the first comparator X1, and the other end of the first capacitor C1 is grounded; one end of the tenth resistor R10 is connected with one side of the seventh resistor R7 close to the first comparator X1, and the other end of the tenth resistor R10 is grounded.
Alternatively, the first comparator X1 and the second comparator X2 may be operational amplifiers or comparison amplifiers.
The present application also provides an electronic device including:
A dual signal light supplementing synchronization circuit;
a camera; the camera is connected with the double-signal light supplementing synchronous circuit and inputs signals to the double-signal light supplementing synchronous circuit; the input signal can be a strobe signal or a burst signal;
A light supplementing device; the light supplementing device is connected with the double-signal light supplementing synchronous circuit and receives an output signal of the double-signal light supplementing synchronous circuit, and the light supplementing device performs light supplementing operation based on the output signal. For example, the output signal is a strobe signal, and the light supplementing device performs strobe light supplementing; the output signal is the burst signal, and the light supplementing device performs burst light supplementing.
Referring to fig. 5-6, fig. 5 is a schematic flow chart of a camera sending out strobe signals; fig. 6 is a schematic flow chart of the video camera sending out the burst signal.
The light supplementing device performs light supplementing operation according to the synchronous signals sent by the camera; the level of the synchronization signal will affect the transmission of the synchronization signal:
s11: when the synchronous signal is a stroboscopic signal, the first optocoupler works normally, and the synchronous signal transmits the stroboscopic signal with the amplitude of the first power supply voltage to the screening module through the first optocoupler;
S12: the first power supply voltage enables the third optocoupler to be fully conducted; the signal output by the third optical coupler is in a low level;
s13: the low level signal is transmitted to the positive terminal of the first comparator and the negative terminal of the second comparator; the first comparator compares the potential difference between the positive terminal and the negative terminal, and the output terminal of the first comparator outputs a low-level signal;
S14: the second comparator compares the voltages of the positive end of the second comparator and the negative end of the second comparator, and the second comparator outputs a high-level signal to the light supplementing device, and the light supplementing device performs stroboscopic light supplementing operation.
S21: when the synchronous signal is a burst signal; the second optocoupler is communicated with the switching tube; at this time, the first optocoupler does not work; transmitting the burst signal with the amplitude of the second power supply voltage to the screening module by the synchronous signal through the second optocoupler;
s22: the second power supply voltage enables the third optocoupler to be in an incomplete conduction state; the voltage at the fourth end of the third optocoupler is the partial voltage of the phototriode; the signal output by the third optocoupler is a voltage division level;
S23: the divided voltage level is transmitted to the positive terminal of the first comparator and the negative terminal of the second comparator; the first comparator compares voltages of the positive terminal and the negative terminal; the voltage of the first end is larger than the voltage of the second end by changing the size of the fourth power supply V4 and the resistance values of the seventh resistor and the tenth resistor, and the output end of the first comparator outputs a high-level signal;
S24: the second comparator compares the voltages of the positive electrode terminal and the negative electrode terminal, and the positive electrode terminal voltage is smaller than the negative electrode terminal voltage by adjusting the resistance values of the eighth resistor and the ninth resistor; the second comparator outputs a low-level signal to the light supplementing device; the light supplementing device performs the flash light supplementing operation.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.
Claims (6)
1. A double-signal light supplementing synchronous circuit, which is connected with a camera and a light supplementing device; the double-signal light filling synchronization circuit is characterized by comprising:
An input signal module; the input signal module comprises a first signal circuit, a second signal circuit and a switching tube module; the first signal circuit comprises a first optocoupler and a first resistor; one end of the first resistor is connected with the first end of the first optocoupler, and the other end of the first resistor is connected with a first signal input; the second signal circuit comprises a second optocoupler and a second resistor; one end of the second resistor is connected with the first end of the second optocoupler, and the other end of the second resistor is connected with a second signal input; the second end of the first optical coupler is grounded, and the fourth end of the first optical coupler is connected with a first power supply; the second end of the second optical coupler is grounded, and the fourth end of the second optical coupler is connected with a second power supply; the third end of the first optical coupler is connected with the third end of the second optical coupler to serve as an output end of the input signal module; the switch tube module comprises a switch tube and a third resistor; the first end of the switching tube is connected with the first end of the first optocoupler, and the second end of the switching tube is connected with one end of the third resistor; one end of the third resistor is connected with the second signal input; the other end of the third resistor and the third end of the switch tube are grounded; the second end of the switching tube is a control end;
A screening module; the screening module receives the output signal of the input signal module and screens based on the output signal; the screening module comprises a third optocoupler, a fifth resistor and a sixth resistor; the first end of the third optical coupler is connected with the output end of the input signal module through the fifth resistor, the second end and the third end of the third optical coupler are grounded, and the fourth end of the third optical coupler is connected with a third power supply through the sixth resistor; the first power supply voltage enables the screening module to be fully conducted, and the second power supply voltage enables the screening module to be incompletely conducted;
A comparator module; the comparator module receives an output signal of the screening module and outputs a high level or a low level based on the output signal; the comparator module comprises a first comparator, a second comparator, a seventh resistor, an eighth resistor and a ninth resistor; the positive terminal of the first comparator is connected with the fourth terminal of the third optocoupler; the positive electrode end of the first comparator is connected with the positive electrode end of the second comparator; the negative electrode end of the first comparator is connected with a fourth power supply through a seventh resistor; the third end of the first comparator is connected with a fifth power supply; a fourth end of the first comparator is grounded; the output end of the first comparator is connected with the negative electrode end of the second comparator through an eighth resistor; the output end of the second comparator is connected with the light supplementing device; one end of the ninth resistor is connected with one side, close to the second comparator, of the eighth resistor, and the other end of the ninth resistor is grounded.
2. The dual signal light-compensating synchronization circuit of claim 1, further comprising a voltage stabilizing circuit; the input signal module is connected with the screening module through the voltage stabilizing circuit; the third end of the first optical coupler is connected with the voltage stabilizing circuit, and the third end of the second optical coupler is connected with the voltage stabilizing circuit; the voltage stabilizing circuit comprises a fourth resistor and a first voltage stabilizing element; one end of the fourth resistor is connected with the third end of the first optocoupler, one end of the first voltage stabilizing element is connected with the third end of the first optocoupler, and the other end of the fourth resistor and the other end of the first voltage stabilizing element are grounded.
3. The dual-signal light-compensating synchronization circuit of claim 2, wherein the screening module further comprises a second voltage stabilizing element, one end of the second voltage stabilizing element is connected with one end of the fifth resistor, which is away from the third optocoupler, and the other end of the second voltage stabilizing element is grounded.
4. The dual signal light compensating synchronization circuit of claim 3 wherein the comparator module further comprises a protection circuit; the protection circuit comprises a first capacitor and a tenth resistor; one end of the first capacitor is connected with one side of the seventh resistor, which is close to the first comparator, and the other end of the first capacitor is grounded; one end of the tenth resistor is connected with one side, close to the first comparator, of the seventh resistor, and the other end of the tenth resistor is grounded.
5. An electronic device, comprising:
the dual signal light supplementing synchronization circuit of any one of claims 1-4;
the camera is connected with the double-signal light supplementing synchronous circuit and inputs signals to the double-signal light supplementing synchronous circuit;
And the light supplementing device receives the output signal of the double-signal light supplementing synchronous circuit and performs light supplementing operation according to the output signal.
6. The electronic device according to claim 5, wherein the light supplementing means performs a light supplementing operation according to a synchronization signal transmitted from the camera; the synchronization signal level will affect the transmission of the synchronization signal:
s11: when the synchronous signal is a stroboscopic signal, the first optical coupler works normally, and the synchronous signal transmits the stroboscopic signal with the amplitude of the first power supply voltage to the screening module through the first optical coupler;
s12: the first power supply voltage enables the third optocoupler to be fully conducted; the signal output by the third optocoupler is of low level;
s13: the low level signal is transmitted to the positive electrode end of the first comparator and the negative electrode section of the second comparator; the first comparator compares the potential difference of the positive electrode end and the negative electrode end, and the output end of the first comparator outputs a low-level signal;
S14: the second comparator compares the voltages of the positive end of the second comparator and the negative end of the second comparator, and the second comparator outputs a high-level signal to the light supplementing device;
s21: when the synchronous signal is a burst signal; the second optocoupler is communicated with the switching tube; at this time, the first optocoupler does not work; the synchronous signal transmits a bursting signal with the amplitude of a second power supply voltage to the screening module through the second optocoupler;
s22: the second power supply voltage enables the third optocoupler to be in an incomplete conduction state; the signal output by the third optocoupler is a voltage division level;
S23: the divided voltage level is transmitted to the positive terminal of the first comparator and the negative terminal of the second comparator; the first comparator compares voltages of the positive terminal and the negative terminal; the output end of the first comparator outputs a high-level signal;
S24: the second comparator compares voltages of a positive terminal of the second comparator and a negative terminal of the second comparator, and the second comparator outputs a low-level signal to the light supplementing device.
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