CN216249956U - Circuit for reducing shutdown power of display and display - Google Patents
Circuit for reducing shutdown power of display and display Download PDFInfo
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- CN216249956U CN216249956U CN202121759939.8U CN202121759939U CN216249956U CN 216249956 U CN216249956 U CN 216249956U CN 202121759939 U CN202121759939 U CN 202121759939U CN 216249956 U CN216249956 U CN 216249956U
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Abstract
The utility model discloses a circuit for reducing shutdown power of a display, which comprises an AC-DC power supply module, a power supply module and a power supply module, wherein the input end of the AC-DC power supply module is connected with commercial power and is used for converting the commercial power into direct current to supply power to the display; the input end of the display power switch module is connected with the output end of the AC-DC power module and controls the on and off of the direct current of the display; the input end of the display load module is connected with the output end of the display power switch module; and after the display is shut down, the display power switch module stops supplying power to the display load module so as to reduce the shutdown power of the display. The utility model can close all the loads of the display after the display is shut down, and the display can save more energy after being shut down.
Description
Technical Field
The utility model relates to the technical field of display devices, in particular to a circuit for reducing shutdown power of a display and the display.
Background
The display is a display screen capable of displaying characters, graphics, images and animations, and generally refers to a display device connected to a host, and display screens of televisions and mobile phones are all regarded as displays, and the displays are more and more widely applied and have more and more functions.
Energy conservation is an important social awareness in the world today, and refers to a series of actions that reduce energy consumption and increase energy utilization as much as possible. The energy-saving definition proposed by the world energy commission in 1979 is: all measures which are feasible technically, reasonable economically and acceptable environmentally and socially are adopted to improve the utilization efficiency of energy resources. At present, people can not leave computers for work, entertainment, study and other activities. The power switch of the common display is a software switch. The software switch is connected to the IO port of the MCU. The MCU detects the high and low electric potentials of the IO port to control the startup and shutdown of the display. However, in the off state, the MCU of the display still consumes power, and therefore, there is still a certain power consumption.
Therefore, the circuit for reducing the shutdown power of the display and the display are provided, all loads of the display are turned off after the display is shut down, and the display saves more energy after the display is shut down.
Disclosure of Invention
The utility model aims to provide a circuit for reducing shutdown power of a display, which is used for solving the problem of power consumption of the display after the display is shut down.
In order to achieve the purpose, the utility model provides the following technical scheme:
a circuit for reducing power off a display, comprising:
the input end of the AC-DC power supply module is connected with commercial power and is used for converting the alternating commercial power into direct current to supply power to the display;
the input end of the display power switch module is connected with the output end of the AC-DC power module and controls the on and off of the direct current of the display;
the input end of the display load module is connected with the output end of the display power switch module;
the display power switch module comprises a first filter circuit, a power switch, a trigger circuit, a switch device, a switch control circuit and a second filter circuit; the input end of the first filter circuit is connected with the output end of the AC-DC power supply module, one end of the power switch is connected with the output end of the AC-DC power supply module, two ends of the power switch are in contact with two input ends of the power generation circuit, the input end of the switch device is connected with the output end of the trigger circuit, the output end of the switch device is connected with one input end of the switch control circuit, the output end of the first filter circuit is connected with the other input end of the switch control circuit, the input end of the second filter circuit is connected with the output end of the switch control circuit, and the output end of the second filter circuit is connected with the display load module.
Further, the trigger circuit comprises a first unidirectional silicon controlled rectifier SCR1, a second unidirectional silicon controlled rectifier SCR2, a diode D16, a diode D17, a resistor R101, a resistor R104 and a capacitor CT 4; the anode of the first unidirectional silicon controlled rectifier SCR1 is connected with the second end of the power switch, the anode of the diode D17 is connected with the first end of the power switch, the cathode of the diode D17 is connected with the trigger electrode of the first unidirectional silicon controlled rectifier SCR1, the cathode of the first unidirectional silicon controlled rectifier SCR1 is connected with the anode of the diode D16 through the resistor R104, the cathode of the first unidirectional silicon controlled rectifier SCR1 is connected with the input end of the switching device, the anode of the second unidirectional silicon controlled rectifier SCR2 is connected with the first end of the power switch, the trigger electrode of the second unidirectional silicon controlled rectifier SCR2 is connected with the cathode of the diode D16, the cathode of the second unidirectional silicon controlled rectifier SCR2 is grounded, the cathode of the diode D16 is connected with one end of the capacitor CT4, and the other end of the capacitor CT4 is grounded.
Further, the switch control circuit comprises a MOS chip U1, a capacitor C241, a resistor R105, a resistor R106, and a resistor R107; the S pole of the MOS chip U1 is connected with the output end of the first filter circuit, the S pole of the MOS chip U1 is connected with one end of a capacitor C241, the other end of the capacitor C241 is connected with the G pole of the MOS chip U1, one end of a resistor R105 is connected with the output end of the switching device, the other end of the resistor R105 is connected with one end of a resistor R107, the other end of the resistor R107 is connected with the output end of the first filter circuit, one end of a resistor R106 is connected with the common connection point of the resistor R105 and the resistor R107, the other end of the resistor R106 is connected with the G pole of the MOS chip U1, and the D pole of the MOS chip U1 is connected with the second filter circuit.
Further, the switching device includes a transistor Q1, a first end of the transistor Q1 is connected to the output end of the trigger circuit through a resistor R102, a first end of the transistor Q1 is grounded through a resistor R103, a second end of the transistor Q1 is grounded, and a third end of the transistor Q1 is connected to an input end of the switch control circuit.
Further, the first filter circuit comprises a capacitor CT3 and a capacitor CB 2; one end of the capacitor CT3 is connected with the output end of the AC-DC power supply module, and the other end is grounded; one end of the capacitor CB2 is connected with the output end of the AC-DC power supply module, and the other end is grounded.
Further, the second filter circuit comprises a capacitor CT2 and a capacitor CB 1; one end of the capacitor CT2 is connected with the output end of the switch control circuit, and the other end is grounded; one end of the capacitor CB1 is connected with the output end of the switch control circuit, and the other end is grounded.
The utility model also provides a display, which is characterized in that: comprising a circuit for reducing the power of a display according to any of the previous claims.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, after the display is shut down, the power supply of all the loads of the display is shut down through the power switch module of the display, so that the display saves more energy after being shut down, the MCU of the display is not required to detect the high and low potentials of the IO port to control the start and shut down of the display, the energy consumption of all the loads of the display is shut down after the display is shut down, and the display saves more energy after being shut down.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic diagram of the circuit configuration of the present invention;
FIG. 3 is a circuit diagram of a power switch module of the display of the present invention;
fig. 4 is a circuit diagram of an AC-DC power module of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a circuit for reducing power off a display, comprising: the input end of the AC-DC power supply module is connected with commercial power and is used for converting the alternating commercial power into direct current to supply power to the display; the input end of the display power switch module is connected with the output end of the AC-DC power module and controls the on and off of the direct current of the display; the input end of the display load module is connected with the output end of the display power switch module; and after the display is shut down, the display power switch module stops supplying power to the display load module so as to reduce the shutdown power of the display. The display consists of an AC-DC power supply module, a display power supply switch module, a display load module and other circuit modules of the display. The AC-DC module converts alternating current commercial power into a quality point to supply power to the display, the display power switch module controls the on and off of direct current of the display, the display power switch module is switched on when the display is started to supply power to a load of the display, and the direct current of the display is switched off after the display is shut down. The direct current of the display is cut off after the display is shut down, and the display power switch module stops supplying power to the display load module, so that the shutdown energy consumption of the display is reduced, and the shutdown power of the display is reduced.
Furthermore, the display power switch module comprises a first filter circuit, a power switch, a trigger circuit, a switch device, a switch control circuit and a second filter circuit; the input end of the first filter circuit is connected with the output end of the AC-DC power supply module, one end of the power switch is connected with the output end of the AC-DC power supply module, two ends of the power switch are respectively connected with two input ends of the trigger circuit, the input end of the switch device is connected with the output end of the trigger circuit, the output end of the switch device is connected with one input end of the switch control circuit, the third end of the switch device is grounded, the output end of the first filter circuit is connected with the other input end of the switch control circuit (namely, the output end of the AC-DC power supply module is connected with the other input end of the switch control circuit after passing through the first filter circuit), the input end of the second filter circuit is connected with the output end of the switch control circuit, and the output end of the second filter circuit is connected with the display load module (namely, the output end of the switch control circuit is connected with the display load module after passing through the second filter circuit). The input end of the first filter circuit is connected with the output end of the AC-DC power supply module, and the first filter circuit is used for filtering and reducing alternating current components in direct current voltage as far as possible. As shown in fig. 2-3, the power switch is a power switch of the display, the power switch K1 is a touch key, when the user does not press the touch key K1, the 2-pin and the 1-pin of the touch switch K1 are open, and when the touch key K1 is pressed, the 2-pin and the 1-pin of the touch switch K1 are closed. The two ends (pin 2 and pin 1 of K1) of the power switch are respectively connected with two input ends of a trigger circuit, the trigger circuit is used for generating trigger conduction voltage according to the on-off condition of the power switch and controlling the on-off of a switch device, the switch control circuit is used for supplying power to a display load module according to the on-off control of the switch device, the input end of a second filter circuit is connected with the output end of the switch control circuit, and the second filter circuit can further reduce alternating current components in direct current voltage and protect the circuit.
Further, in order to generate a trigger conducting voltage according to the on-off condition of the power switch and control the on-off of the switching device, the trigger circuit comprises a first unidirectional silicon controlled rectifier SCR1, a second unidirectional silicon controlled rectifier SCR2, a diode D16, a diode D17, a resistor R101, a resistor R104 and a capacitor CT 4; the anode of the first unidirectional silicon controlled rectifier SCR1 is connected with the second end of the power switch, the anode of the diode D17 is connected with the first end of the power switch, the cathode of the diode D17 is connected with the trigger electrode of the first unidirectional silicon controlled rectifier SCR1, the cathode of the first unidirectional silicon controlled rectifier SCR1 is connected with the anode of the diode D16 through the resistor R104, the cathode of the first unidirectional silicon controlled rectifier SCR1 is connected with the input end of the switching device, the anode of the second unidirectional silicon controlled rectifier SCR2 is connected with the first end of the power switch, the trigger electrode of the second unidirectional silicon controlled rectifier SCR2 is connected with the cathode of the diode D16, the cathode of the second unidirectional silicon controlled rectifier SCR2 is grounded, the cathode of the diode D16 is connected with one end of the capacitor CT4, and the other end of the capacitor CT4 is grounded.
As shown in fig. 3, in the AC power-on state, after the display is normally powered on, the AC power passes through the AC-DC power module and then outputs a stable 12V power (+12V), +12V voltage passes through R100 and then loads the 2 pin (anode) of the first unidirectional silicon controlled rectifier SCR1, +12V voltage passes through R100 resistor and then loads the 2 pin of the power switch K1, K1 is the power switch of the display, K1 is a light touch button, when the user does not press the light touch button K1, the 2 pin and the 1 pin of the light touch switch K1 are disconnected, the 3 pin (trigger) of the first unidirectional silicon controlled rectifier SCR1 does not have trigger voltage at this time, therefore, the pin 2 (anode) and the pin 1 (cathode) of the first one-way silicon controlled rectifier SCR1 are turned off, the switching device is not conducted, the switching control circuit does not supply power to the display load module according to the non-conduction control of the switching device, and the display load module does not supply power to enable the display to be in a power-off state.
When the power is on to the starting state: when the user touches the key of the power switch K1, the pins 2 and 1 of the power switch K1 are connected. The +12V power passes through R100, pin 2 of the power switch K1, pin 1 of the power switch K1, to the anode of the diode D17, to the cathode of the diode D17, and then to pin 3 (trigger) of the first one-way thyristor SCR 1. The 3-pin high potential of the first unidirectional silicon controlled rectifier SCR1 triggers the 2-pin (anode) and the 1-pin (cathode) of the first unidirectional silicon controlled rectifier SCR1 to be conducted, so that a high potential is generated, a trigger conduction voltage is generated, the switch device is conducted, the switch control circuit supplies power to the display load module according to the conduction control of the switch device, the display load module supplies power to enable the display to be in a starting state, and thus the +12V power supply supplies power to the display load module. After the pin 2 (anode) and the pin 1 (cathode) of the first one-way thyristor SCR1 are turned on, the high voltage also charges the capacitor CT4 through the resistor R104 and the diode D6. Because the voltage at the two ends of the capacitor CT4 cannot change suddenly, the pin 3 (trigger electrode) of the second one-way thyristor SCR2 is also at a low potential, the pin 2 (anode) and the pin 3 (trigger electrode) of the second one-way thyristor SCR2 are also turned off and not conducted, and the pin 2 and the pin 1 of the power switch K1 are turned off after the display is turned on.
When the computer is started to be in a power-off state: when a user lightly touches a key of the power switch K1, the voltage at two ends of the capacitor CT4 is used as the trigger voltage of the second one-way thyristor SCR 2. The positive voltage of the capacitor CT4 is loaded to the pin 3 (trigger electrode) of the second unidirectional silicon controlled rectifier SCR2 after passing through the resistor R101, so that the pin 2 (anode) and the pin 1 (cathode) of the second unidirectional silicon controlled rectifier SCR2 are turned on (at this time, the capacitor CT4 capacitor passes through the resistor R101, the pin 3 of the second unidirectional silicon controlled rectifier SCR2 discharges to the ground), the pin 2 and the pin 1 of the power switch K1 key are also turned on, then the pin 2 (anode) of the first unidirectional silicon controlled rectifier SCR1 is changed to a low potential, and the pin 2 (anode) and the pin 1 (cathode) of the first unidirectional silicon controlled rectifier SCR1 are disconnected. After the pin 2 and the pin 1 of the first one-way silicon controlled rectifier SCR1 are disconnected, the switch device is not conducted, the switch control circuit does not supply power to the display load module according to the non-conduction control of the switch device, and the display load module does not supply power to enable the display to be in a shutdown state.
Further, the switch control circuit comprises a MOS chip U1, a capacitor C241, a resistor R105, a resistor R106, and a resistor R107; the S pole of the MOS chip U1 is connected with the output end of the first filter circuit, the S pole of the MOS chip U1 is connected with one end of a capacitor C241, the other end of the capacitor C241 is connected with the G pole of the MOS chip U1, one end of a resistor R105 is connected with the output end of the switching device, the other end of the resistor R105 is connected with one end of a resistor R107, the other end of the resistor R107 is connected with the output end of the first filter circuit, one end of a resistor R106 is connected with the common connection point of the resistor R105 and the resistor R107, the other end of the resistor R106 is connected with the G pole of the MOS chip U1, and the D pole of the MOS chip U1 is connected with the second filter circuit. As shown in fig. 3, U1 is a PMOS integrated circuit chip, pins 1, 2, and 3 of MOS chip U1 are connected in common, pins 1, 2, and 3 are all S-poles, pin 4 of MOS chip U1 is G-pole, pins 5, 6, 7, and 8 of MOS chip U1 are connected in common, pins 5, 6, 7, and 8 are all D-poles, in the power-on state, pin 2 and pin 1 of power switch K1 are disconnected, the switch device is not turned on, so that +12V power passes through R107 after passing through the first filter circuit, R106 is directly loaded to G-pole of MOS chip U1, and after G-pole and S-pole of MOS chip U1 are both high-potential, S-pole and D-pole of MOS chip U1 are turned off, and the display load module is not powered to make the display in the power-off state; when the power-on state is started, the pin 2 and the pin 1 of the power switch K1 are connected, after the switching device is conducted, one end of the resistor R105 and one end of the resistor R106 generate a low potential, then the G pole of the MOS chip U1 generates a low potential, and the low potentials of the G pole and the S pole of the MOS chip U1 cause the S pole and the D pole of the MOS chip U1 to be opened, so that the +12V power supply supplies power to the display load module; when the display is turned on and turned off, the switching device is not switched on, then the G pole of the MOS chip U1 is changed to be high potential, and then the S pole and the D pole of the MOS chip U1 are switched off, so that the power supply of the display load module is switched off, and the display is turned off.
Further, the switching device includes a transistor Q1, a first end of the transistor Q1 is connected to the output end of the trigger circuit through a resistor R102, a first end of the transistor Q1 is grounded through a resistor R103, a second end of the transistor Q1 is grounded, and a third end of the transistor Q1 is connected to an input end of the switch control circuit. As shown in fig. 3, the first, second and third terminals of the transistor Q1 are the base b, the emitter e and the collector c, respectively, after the 2 pin and the 1 pin of the power switch K1 are connected, the 3 pin high potential of the first one-way SCR1 triggers the 2 pin and the 1 pin of the first one-way SCR1 to conduct, so that the high potential is loaded to the b pole of the transistor Q1 through the resistor R102, the high potentials of the b pole and the e pole of the Q1 cause the c pole and the e pole of the transistor Q1 to conduct in saturation, the c pole and the e pole of the Q1 conduct in saturation, the switching device is turned on, the voltage flows to the switch control circuit, the power supply supplies power to the display load module, otherwise, when the user lightly touches the key of the power switch K1, the key 2 pin and the 1 pin of the power switch K1 are also conducted, then the 2 pin (anode) of the first one-way SCR1 is turned to ground potential, the pin 2 pin and the SCR1 pin of the first one-way SCR1 is turned off, the disconnection of pins 2 and 1 of the first triac SCR1 causes the b-pole of transistor Q1 to go low. The c and e poles of transistor Q1 are then caused to turn off, the switching device is turned off, voltage does not flow to the switch control circuit, and the power supply does not provide power to the display load module.
Further, in order to filter, as much as possible, the ac component in the dc voltage, the first filter circuit includes a capacitor CT3 and a capacitor CB 2; one end of the capacitor CT3 is connected with the output end of the AC-DC power supply module, and the other end is grounded; one end of the capacitor CB2 is connected with the output end of the AC-DC power supply module, and the other end is grounded.
Further, in order to protect the circuit and reduce the alternating current component in the direct current voltage as much as possible, the second filter circuit comprises a capacitor CT2 and a capacitor CB 1; one end of the capacitor CT2 is connected with the output end of the switch control circuit, and the other end is grounded; one end of the capacitor CB1 is connected with the output end of the switch control circuit, and the other end is grounded.
The utility model also provides a display, which is characterized in that: comprising a circuit for reducing the power of a display according to any of the previous claims. The display is provided with the circuit for reducing the shutdown power of the display, so that the display is more energy-saving.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A circuit for reducing power off of a display, comprising:
the input end of the AC-DC power supply module is connected with commercial power and is used for converting the alternating commercial power into direct current to supply power to the display;
the input end of the display power switch module is connected with the output end of the AC-DC power module and controls the on and off of the direct current of the display;
the input end of the display load module is connected with the output end of the display power switch module;
the display power switch module comprises a first filter circuit, a power switch, a trigger circuit, a switch device, a switch control circuit and a second filter circuit; the input end of the first filter circuit is connected with the output end of the AC-DC power supply module, one end of the power switch is connected with the output end of the AC-DC power supply module, two ends of the power switch are in contact with two input ends of the power generation circuit, the input end of the switch device is connected with the output end of the trigger circuit, the output end of the switch device is connected with one input end of the switch control circuit, the output end of the first filter circuit is connected with the other input end of the switch control circuit, the input end of the second filter circuit is connected with the output end of the switch control circuit, and the output end of the second filter circuit is connected with the display load module.
2. The circuit for reducing power off of a display according to claim 1, wherein: the trigger circuit comprises a first unidirectional silicon controlled rectifier SCR1, a second unidirectional silicon controlled rectifier SCR2, a diode D16, a diode D17, a resistor R101, a resistor R104 and a capacitor CT 4; the anode of the first unidirectional silicon controlled rectifier SCR1 is connected with the second end of the power switch, the anode of the diode D17 is connected with the first end of the power switch, the cathode of the diode D17 is connected with the trigger electrode of the first unidirectional silicon controlled rectifier SCR1, the cathode of the first unidirectional silicon controlled rectifier SCR1 is connected with the anode of the diode D16 through the resistor R104, the cathode of the first unidirectional silicon controlled rectifier SCR1 is connected with the input end of the switching device, the anode of the second unidirectional silicon controlled rectifier SCR2 is connected with the first end of the power switch, the trigger electrode of the second unidirectional silicon controlled rectifier SCR2 is connected with the cathode of the diode D16, the cathode of the second unidirectional silicon controlled rectifier SCR2 is grounded, the cathode of the diode D16 is connected with one end of the capacitor CT4, and the other end of the capacitor CT4 is grounded.
3. The circuit for reducing power off of a display according to claim 1, wherein: the switch control circuit comprises a MOS chip U1, a capacitor C241, a resistor R105, a resistor R106 and a resistor R107; the S pole of the MOS chip U1 is connected with the output end of the first filter circuit, the S pole of the MOS chip U1 is connected with one end of a capacitor C241, the other end of the capacitor C241 is connected with the G pole of the MOS chip U1, one end of a resistor R105 is connected with the output end of the switching device, the other end of the resistor R105 is connected with one end of a resistor R107, the other end of the resistor R107 is connected with the output end of the first filter circuit, one end of a resistor R106 is connected with the common connection point of the resistor R105 and the resistor R107, the other end of the resistor R106 is connected with the G pole of the MOS chip U1, and the D pole of the MOS chip U1 is connected with the second filter circuit.
4. A circuit for reducing power off a display according to claim 2 or 3, wherein: the switching device comprises a triode Q1, the first end of a triode Q1 is connected with the output end of the trigger circuit through a resistor R102, the first end of a triode Q1 is grounded after passing through a resistor R103, the second end of a triode Q1 is grounded, and the third end of a triode Q1 is connected with one input end of the switch control circuit.
5. The circuit for reducing power off of a display according to claim 4, wherein: the first filter circuit comprises a capacitor CT3 and a capacitor CB 2; one end of the capacitor CT3 is connected with the output end of the AC-DC power supply module, and the other end is grounded; one end of the capacitor CB2 is connected with the output end of the AC-DC power supply module, and the other end is grounded.
6. The circuit for reducing power off of a display according to claim 4, wherein: the second filter circuit comprises a capacitor CT2 and a capacitor CB 1; one end of the capacitor CT2 is connected with the output end of the switch control circuit, and the other end is grounded; one end of the capacitor CB1 is connected with the output end of the switch control circuit, and the other end is grounded.
7. A display, characterized by: comprising a circuit for reducing the power-off of a display as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121759939.8U CN216249956U (en) | 2021-07-30 | 2021-07-30 | Circuit for reducing shutdown power of display and display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121759939.8U CN216249956U (en) | 2021-07-30 | 2021-07-30 | Circuit for reducing shutdown power of display and display |
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| CN216249956U true CN216249956U (en) | 2022-04-08 |
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| CN202121759939.8U Active CN216249956U (en) | 2021-07-30 | 2021-07-30 | Circuit for reducing shutdown power of display and display |
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