CN218473027U - Working power supply circuit of display - Google Patents
Working power supply circuit of display Download PDFInfo
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- CN218473027U CN218473027U CN202222751708.3U CN202222751708U CN218473027U CN 218473027 U CN218473027 U CN 218473027U CN 202222751708 U CN202222751708 U CN 202222751708U CN 218473027 U CN218473027 U CN 218473027U
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Abstract
The utility model provides a working power supply circuit of a display, which comprises a transformation module, a starting module, a controllable switch module, a main control chip module and a display screen load module, wherein the transformation module is used for accessing commercial power and converting the commercial power into load basic voltage; the starting module is electrically connected with the output end of the voltage transformation module, the controllable switch module is electrically connected with the output end of the starting module, and meanwhile, the controllable switch module is electrically connected with the voltage transformation module and controls the on-off of the controllable switch module according to the voltage of a feedback winding of the voltage transformation module; the output at vary voltage module and controllable switch module is connected to the main control chip module body of rod electricity, display screen load module electricity is connected at the output of main control chip module, the utility model provides an at power supply circuit during operation, starting circuit does not break off, and resistance among the starting circuit is consuming power always and generates heat, has reduced the problem of the effective power of electric energy.
Description
Technical Field
The utility model relates to a display technical field especially relates to a display working power supply circuit.
Background
The power module of the display is generally provided with a starting circuit, the conventional starting circuit is composed of a resistor and a capacitor, and when the power circuit works, the starting circuit is not disconnected, so that the resistor in the starting circuit is always in a heating state and consumes power, and the effective power of electric energy is reduced.
Therefore, it is necessary to provide a power supply circuit for operating a display to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a display working power supply circuit is used for solving at power supply circuit during operation, and starting circuit does not break off, and consequently resistance among the starting circuit is at the power consumption always equally, is in the state of generating heat always to the problem of the effective power of electric energy has been reduced.
The utility model provides a display working power supply circuit, which comprises a transformation module, a starting module, a controllable switch module, a main control chip module and a display screen load module, wherein the transformation module is used for accessing commercial power and converting the commercial power into load basic voltage;
the starting module is electrically connected with the output end of the voltage transformation module, the controllable switch module is electrically connected with the output end of the starting module, and meanwhile, the controllable switch module is electrically connected with the voltage transformation module and controls the on-off of the controllable switch module according to the voltage of a feedback winding of the voltage transformation module; the rod body of the main control chip module is electrically connected with the output ends of the voltage transformation module and the controllable switch module, and the display screen load module is electrically connected with the output end of the main control chip module.
Preferably, the voltage transformation module comprises an ac filter circuit, a bridge rectifier filter circuit, and a switch circuit, wherein,
the alternating current filter circuit is used for eliminating high-frequency interference in commercial power;
the bridge rectifier filter circuit is used for converting alternating current into direct current;
the switching circuit is used for converting the direct current into basic working voltage of the display screen load module.
Preferably, the starting module includes a resistor R1 and a capacitor C1 connected in series, where R1 is connected to the output end of the transforming module and the input end of the controllable switch module, and the capacitor C1 is connected to the output end of the controllable switch module and grounded.
Preferably, the controllable switch module comprises a thyristor VS1, a diode VD2, a triode VT and a photoelectric coupler OC; wherein,
the input end of the photoelectric coupler is connected with the output end of the voltage transformation module, and the output of the voltage transformation module is used as the control voltage of the photoelectric coupler;
the base electrode of the triode VT is electrically connected with the collector electrode of a photosensitive triode of the photoelectric coupler OC, and the collector electrode of the triode VT is electrically connected with the G electrode of the thyristor VS 1;
the thyristor VS1 is electrically connected with an electric circuit of the starting module;
the diode VD2 is electrically connected to the electrical circuit of the starting module.
Preferably, the controllable switch module further includes a resistor R2, a resistor R3, and a resistor R6.
Preferably, the main control chip module at least comprises a PWM control chip with a model of UC 3842.
Compared with the prior art, the utility model provides a pair of display working power supply circuit has as follows
Has the advantages that:
the utility model discloses a starting module is after the power start is accomplished, cut off starting module by controllable switch module, make it no longer work, therefore make its disconnection at power during operation, the resistance loss of starting module has been reduced, it generates heat also to reduce resistance, the work that the power can be safer, solved at power supply circuit during operation, starting circuit does not break off, resistance among the starting circuit is at power consumption always, be in the state of generating heat always, thereby the problem of the effective power of electric energy has been reduced.
Drawings
Fig. 1 is a schematic diagram of a wire frame structure of a display working power supply circuit according to the present invention;
fig. 2 is a schematic structural diagram of a working power circuit of a display according to the present invention;
fig. 3 is a circuit diagram of a controllable switch module of the working power supply circuit of the display of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.
The present invention will be further described with reference to the accompanying drawings and embodiments.
In this embodiment, as shown in fig. 1, a working power supply circuit for a display includes a transforming module for connecting to a commercial power and converting into a basic load voltage, a starting module for starting the power supply circuit, a controllable switch module for switching off the starting module after the power supply is started, a main control chip module for controlling the power supply circuit, and a display screen load module;
the starting module is electrically connected with the output end of the voltage transformation module, the controllable switch module is electrically connected with the output end of the starting module, and meanwhile, the controllable switch module is electrically connected with the voltage transformation module and controls the on-off of the controllable switch module according to the voltage of a feedback winding of the voltage transformation module; the rod body of the main control chip module is electrically connected with the output ends of the voltage transformation module and the controllable switch module, and the display screen load module is electrically connected with the output end of the main control chip module.
In this embodiment, the voltage transformation module includes an ac filter circuit, a bridge rectifier filter circuit, and a switch circuit, where the ac filter circuit is used to eliminate high-frequency interference in the utility power; the bridge rectifier filter circuit is used for converting alternating current into direct current, and particularly, the bridge rectifier filter circuit converts 220V alternating current into 300V direct current; the switching circuit is used for converting the direct current into the basic working voltage of the display screen load module, and specifically, a switching transformer and a switching tube of the switching circuit convert 300V direct current into 3.3V, 5V or 12V load basic working voltage for normal work of a load.
In this embodiment, as shown in fig. 2, the starting module includes a resistor R1 and a capacitor C1 connected in series, where R1 is connected to the output end of the transforming module and the input end of the controllable switch module, and the capacitor C1 is connected to the output end of the controllable switch module and grounded; specifically, the direct current converted by the voltage transformation module charges the C1 through the resistor R1 and the conducted controllable switch module, when the voltage at two ends of the C1 reaches a set value, the oscillation circuit of the main control chip module is electrified to work, and a driving pulse is output to control the switch tube of the switch circuit to work;
after the power supply normally works, the controllable switch module receives pulse voltage induced on a secondary winding of a switch transformer in the switch circuit, and the voltage can drive the controllable switch module to be disconnected, so that the starting module does not work any more, and the problems that when the power supply circuit works, the starting circuit is not disconnected, the resistor in the starting circuit consumes power all the time and is in a heating state all the time, and the effective power of electric energy is reduced are solved.
In this embodiment, as shown in fig. 3, the controllable switch module includes a thyristor VS1, a diode VD2, a triode VT, and a photo coupler OC; wherein,
the input end of the photoelectric coupler is connected with the output end of the voltage transformation module, and the output of the voltage transformation module is used as the control voltage of the photoelectric coupler; the base electrode of the triode VT is electrically connected with the collector electrode of a photosensitive triode of the photoelectric coupler OC, and the collector electrode of the triode VT is electrically connected with the G electrode of the thyristor VS 1;
the thyristor VS1 is electrically connected with the circuit of the starting module; the diode VD2 is electrically connected on the circuit of the starting module;
the circuit also comprises a resistor R2, a resistor R3 and a resistor R6, wherein the resistor R2 is connected between the anode and the cathode of the thyristor VS1, the resistor R3 is connected with the resistor R2 in parallel, the resistor R3 is connected with a pin of a photoelectric coupler, and the resistor R6 is connected between the G pole of the thyristor VS1 and the collector of the triode VT;
specifically, the on and off of the switches in the figure are controlled by control voltage; when no control voltage exists, the photoelectric coupler OC does not work, the triode VT is conducted due to the fact that the base voltage of the triode VT is high, and after the triode VT is conducted, the voltage of the collector of the triode VT is close to 0V, so that the thyristor VS1 is in a cut-off state due to the fact that the G pole of the thyristor does not have trigger voltage, and at the moment, two ends of the starting module are in an open circuit, namely in a cut-off state.
When a control voltage is available, the photoelectric coupler OC starts to work, the base voltage of the triode VT is bypassed, the triode VT is cut off, the voltage of the collector of the triode VT is very high, the trigger voltage can control the conduction of the thyristor VS1, and then the current flows from the anode of the starting module to the thyristor VS1, then flows to the diode VD2 and finally flows to the cathode of the starting module.
Then, when the voltage transformation module provides control voltage for the controllable switch module, the controllable switch module is in a conducting state, otherwise, the controllable switch module is in a disconnecting state, when the controllable switch module actually works, the controllable switch module is in a conducting state when the power supply is started, and the power supply is disconnected after the power supply is started.
In this embodiment, the main control chip module at least includes a PWM control chip with a model of UC 3842.
The above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification and the attached drawings, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.
Claims (6)
1. A working power supply circuit of a display is characterized by comprising a transformation module, a starting module, a controllable switch module, a main control chip module and a display screen load module, wherein the transformation module is used for accessing a mains supply and converting the mains supply into a load basic voltage;
the starting module is electrically connected with the output end of the voltage transformation module, the controllable switch module is electrically connected with the output end of the starting module, and meanwhile, the controllable switch module is electrically connected with the voltage transformation module and controls the on-off of the controllable switch module according to the voltage of a feedback winding of the voltage transformation module; the rod body of the main control chip module is electrically connected with the output ends of the voltage transformation module and the controllable switch module, and the display screen load module is electrically connected with the output end of the main control chip module.
2. The power supply circuit of claim 1, wherein the transforming module comprises an AC filter circuit, a bridge rectifier filter circuit and a switch circuit,
the alternating current filter circuit is used for eliminating high-frequency interference in commercial power;
the bridge rectifier filter circuit is used for converting alternating current into direct current;
the switching circuit is used for converting the direct current into basic working voltage of the display screen load module.
3. The power supply circuit for display operation according to claim 1, wherein the starting module comprises a resistor R1 and a capacitor C1 connected in series, wherein R1 is connected to the output terminal of the transforming module and the input terminal of the controllable switching module, and the capacitor C1 is connected to the output terminal of the controllable switching module and grounded.
4. The power supply circuit of claim 1, wherein the controllable switch module comprises a thyristor VS1, a diode VD2, a transistor VT, and an opto-coupler OC; wherein,
the input end of the photoelectric coupler is connected with the output end of the voltage transformation module, and the output of the voltage transformation module is used as the control voltage of the photoelectric coupler;
the base electrode of the triode VT is electrically connected with the collector electrode of a photosensitive triode of the photoelectric coupler OC, and the collector electrode of the triode VT is electrically connected with the G electrode of the thyristor VS 1;
the thyristor VS1 is electrically connected with an electric circuit of the starting module;
the diode VD2 is electrically connected to the electrical circuit of the starting module.
5. The circuit of claim 4, wherein the controllable switch module further comprises a resistor R2, a resistor R3, and a resistor R6.
6. The operating power supply circuit of any one of claims 1-5, wherein the main control chip module comprises at least a PWM control chip with model number UC 3842.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222751708.3U CN218473027U (en) | 2022-10-19 | 2022-10-19 | Working power supply circuit of display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222751708.3U CN218473027U (en) | 2022-10-19 | 2022-10-19 | Working power supply circuit of display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218473027U true CN218473027U (en) | 2023-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222751708.3U Active CN218473027U (en) | 2022-10-19 | 2022-10-19 | Working power supply circuit of display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218473027U (en) |
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2022
- 2022-10-19 CN CN202222751708.3U patent/CN218473027U/en active Active
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