CN214125131U - Power output circuit, power output device and display device - Google Patents
Power output circuit, power output device and display device Download PDFInfo
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- CN214125131U CN214125131U CN202023332922.2U CN202023332922U CN214125131U CN 214125131 U CN214125131 U CN 214125131U CN 202023332922 U CN202023332922 U CN 202023332922U CN 214125131 U CN214125131 U CN 214125131U
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- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
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- 239000004065 semiconductor Substances 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
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Abstract
The utility model belongs to the technical field of electronics, in particular to a power output circuit, a power output device and a display device, wherein, the power output circuit comprises a first switch circuit, a first resistor and a resistor adjustable circuit, the resistor adjustable circuit outputs a first preset resistance value of a resistor when the power output circuit is initially electrified, the resistor and the first resistor form a resistor divider circuit, and then outputs a first voltage to the first switch circuit, the first switch circuit keeps off, after a preset time, the resistor adjustable circuit outputs a second preset resistance value of a resistor, the resistor and a second resistor form another resistor divider circuit, outputs a second voltage to a second switch circuit, the second switch circuit is conducted, and outputs a power signal to the rear end, through adopting the resistor adjustable circuit, the power output time sequence is changed, meanwhile, compared with the complex programmable logic device technology, simple structure and reduced design cost.
Description
Technical Field
The utility model belongs to the technical field of the electron, especially, relate to a power output circuit, power output device and display device.
Background
With the development of electronic technology, the structures of circuit systems of various electronic products (such as televisions, display screens, and the like) are more and more complex, the power-on time sequences of power supply voltages of different modules are mostly different, and the power-on time sequences also have requirements.
The conventional power management technology is a Complex Programmable Logic Device (CPLD) technology, in which an output input/output (IO) pin of the CPLD is used to control pins of different power chips, the CPLD is a Programmable Logic Device, which can flexibly and precisely control an output sequence of each pin and a time interval of each pin, but the CPLD technology increases complexity of a product and hardware cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power output circuit aims at solving the power management module of traditional control power output chronogenesis and has the problem that the structure is complicated and with high costs.
A first aspect of an embodiment of the present invention provides a power output circuit, which includes a first switch circuit, a first resistor, and a resistor adjustable circuit;
the power input end of the first switch circuit and the first end of the first resistor are connected together to form the power input end of the power output circuit, and the second end of the first resistor, the power end of the resistor adjustable circuit and the controlled end of the first switch circuit are interconnected;
the resistance adjustable circuit is used for outputting a first preset resistance value of a resistor when a power supply input end of the power supply output circuit initially receives a power supply signal so that the first switch circuit receives a first voltage, and outputting a second preset resistance value of the resistor after a preset time length so that the first switch circuit receives a second voltage;
the first switch circuit is used for being switched off when receiving the first voltage, and being switched on and outputting the power supply signal when receiving the second voltage.
In one embodiment, the resistance adjustable circuit comprises a second resistor, a third resistor, a fourth resistor, a tank circuit and a second switch circuit;
the first end of the second resistor, the first end of the third resistor and the first end of the fourth resistor are connected together to form a power supply end of the resistor adjustable circuit, the second end of the third resistor is connected with the first end of the second switch circuit, the second end of the fourth resistor, the controlled end of the second switch circuit and the first end of the energy storage circuit are interconnected, and the second end of the energy storage circuit, the second end of the second switch circuit and the second end of the second resistor are all grounded;
the energy storage circuit is used for controlling the second switch circuit to be switched off during initial charging and controlling the second switch circuit to be switched on after charging for a preset time.
In one embodiment, the tank circuit includes a tank capacitor.
In one embodiment, the second switching circuit comprises an electronic switching tube.
In one embodiment, the electronic switch tube is an NPN-type triode.
In one embodiment, the first switching circuit includes a switching chip or a metal oxide semiconductor transistor.
In one embodiment, the power output circuit further includes an output filter circuit for filtering, a power input terminal of the output filter circuit is connected to the power output terminal of the first switch circuit, and a power output terminal of the output filter circuit is the power output terminal of the power output circuit.
The utility model discloses power output device is provided to the second aspect of the embodiment, power output device includes a plurality of as above power output circuit, and is a plurality of power output circuit respectively with a plurality of loads one-to-one electric connection.
In one embodiment, the power output apparatus further includes a power module, and a plurality of power terminals of the power module are electrically connected to the power input terminals of the plurality of power output circuits one by one, respectively.
A third aspect of the embodiments of the present invention provides a display device, which includes a plurality of loads and a power output device as described above.
The embodiment of the utility model provides a through adopting first switch circuit, power output circuit is constituteed to first resistance and resistance adjustable circuit, wherein, resistance adjustable circuit exports the first resistance of predetermineeing the resistance when power output circuit is initial to be gone up, this resistance constitutes resistance bleeder circuit with first resistance, and then export first voltage to first switch circuit, first switch circuit keeps turning off, after predetermineeing the time, resistance adjustable circuit exports the resistance of the second predetermined resistance, another resistance bleeder circuit is constituteed with second resistance to this resistance, export second voltage to second switch circuit, second switch circuit switches on, and export power signal to rear end, through adopting resistance adjustable circuit, change power output time sequence, and simultaneously, compare in the CPLD technique, moreover, the steam generator is simple in structure and reduced the design cost.
Drawings
Fig. 1 is a schematic diagram of a first structure of a power output circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second structure of a power output circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a third structure of a power output circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a fourth structure of a power output circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a power output apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The utility model provides a first aspect provides a power output circuit.
As shown in fig. 1, fig. 1 is a first schematic structural diagram of a power output circuit provided in an embodiment of the present invention, in this embodiment, the power output circuit includes a first switch circuit 10, a first resistor R1 and a resistor adjustable circuit 20;
a power supply input end of the first switch circuit 10 and a first end of the first resistor R1 are commonly connected to form a power supply input end IN of the power supply output circuit, and a second end of the first resistor R1, a power supply end of the resistance adjustable circuit 20 and a controlled end of the first switch circuit 10 are interconnected;
the resistance adjustable circuit 20 is configured to output a first preset resistance value of a resistor when a power input terminal IN of the power output circuit initially receives a power signal, so that the first switch circuit 10 receives a first voltage, and output a second preset resistance value of the resistor after a preset duration, so that the first switch circuit 10 receives a second voltage;
the first switch circuit 10 is configured to turn off when receiving the first voltage, and turn on and output the power signal when receiving the second voltage.
In this embodiment, the first switch circuit 10 is turned on or off according to the magnitude of the controlled terminal voltage, wherein the first switch circuit 10 can be turned on by receiving a large voltage and turned off by receiving a small voltage, or turned on by receiving a small voltage and turned on by receiving a large voltage, where the large voltage and the small voltage are relative to the turn-on threshold voltage or the turn-off threshold voltage of the first switch circuit 10, for example, the voltage greater than the turn-on threshold voltage is a large voltage and the voltage less than the turn-on threshold voltage is a small voltage, and the specific turn-on mode of the first switch circuit 10 can be set according to the structure of the resistance adjustable circuit 20 and the divided voltage value.
When the power output circuit is initially powered on, a power signal is input to the first switch circuit 10 and is input to the resistance adjustable circuit 20 through the first resistor R1, at this time, the resistance adjustable circuit 20 is in a first resistance state and outputs a resistor with a first preset resistance value, the resistor is connected in series to the first resistor R1 and the ground end, and forms a resistance voltage dividing circuit with the first resistor R1 to divide the power signal, the controlled end of the first switch circuit 10 receives a divided first voltage, at this time, the first voltage does not reach the turn-on threshold voltage of the first switch circuit 10, the first switch circuit 10 is turned off, the output power signal is cut off, as time goes on, the state of the resistance adjustable circuit 20 changes under the action of the power signal, the resistance value of the resistance adjustable circuit 20 can gradually change or reach the critical point switching, when the time reaches the preset time, the resistance adjustable circuit 20 outputs a resistor with a second preset resistance value, another resistance voltage dividing circuit is formed by the resistor with the second preset resistance value and the first resistor R1 to divide the voltage of the power supply signal, the controlled end of the first switch circuit 10 receives the divided second voltage, at the moment, the second voltage reaches the conduction threshold voltage of the first switch circuit 10, the first switch circuit 10 is conducted, the received power supply signal is output to a rear end load, and therefore accurate control of the power supply output time sequence is achieved.
When a plurality of loads need to be powered on, a plurality of power output circuits are equipped and respectively connected with the plurality of loads, and the output time sequence of the second voltage is changed by setting corresponding parameters of internal components of the resistance adjustable circuit 20, so that the power output of the multi-load preset time sequence is realized.
The first switch circuit 10 may be a switch component, such as a transistor, a metal oxide semiconductor, a relay, or the like, which is turned on or off according to the voltage level, and in one embodiment, the first switch circuit 10 is a switch chip or a metal oxide semiconductor.
The resistance adjustable circuit 20 may adopt a combination structure of an energy storage capacitor, a switching circuit and a series-parallel resistor structure, the switching circuit is turned on correspondingly according to the charging state of the energy storage capacitor C1, and then resistors with different resistance values are connected in series or in parallel, and the specific structure of the resistance adjustable circuit 20 is not limited specifically here.
The embodiment of the utility model provides a through adopting first switch circuit 10, power output circuit is constituteed to first resistance R1 and resistance adjustable circuit 20, wherein, resistance adjustable circuit 20 exports the first resistance of predetermineeing when power output circuit is initial to power up, this resistance constitutes resistance bleeder circuit with first resistance R1, and then export first voltage to first switch circuit 10, first switch circuit 10 keeps turning off, after predetermineeing the time, resistance of resistance is predetermine to resistance adjustable circuit 20 output second, this resistance constitutes another resistance bleeder circuit with second resistance R2, export second voltage to second switch circuit 21, second switch circuit 21 switches on, and output power signal to rear end, through adopting resistance adjustable circuit 20, change power output time sequence, and simultaneously, compare in the CPLD technique, moreover, the steam generator is simple in structure and reduced design cost.
As shown in fig. 2, in one embodiment, the resistance adjustable circuit 20 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a tank circuit 22, and a second switch circuit 21;
a first end of the second resistor R2, a first end of the third resistor R3 and a first end of the fourth resistor R4 are connected in common to form a power supply end of the resistance adjustable circuit 20, a second end of the third resistor R3 is connected with a first end of the second switch circuit 21, a second end of the fourth resistor R4, a controlled end of the second switch circuit 21 and a first end of the energy storage circuit 22 are interconnected, and a second end of the energy storage circuit 22, a second end of the second switch circuit 21 and a second end of the second resistor R2 are all grounded;
and the energy storage circuit 22 is used for controlling the second switch circuit 21 to be switched off during initial charging and controlling the second switch circuit 21 to be switched on after a preset charging time period.
In this embodiment, when the power output circuit is initially powered on, the power signal is input to the first switch circuit 10 and is input to the energy storage circuit 22 through the first resistor R1 and the fourth resistor R4, at this time, the energy storage circuit 22 is initially charged, the terminal voltage of the energy storage circuit 22 does not reach the on-threshold voltage of the second switch circuit 21, the second switch circuit 21 keeps the off state, the second resistor R2 and the first resistor R1 form a resistor voltage dividing circuit to divide the power signal, the controlled terminal of the first switch circuit 10 receives the divided first voltage, the first voltage does not reach the on-threshold voltage of the first switch circuit 10, the first switch circuit 10 is turned off, the output power signal is turned off, the terminal voltage of the energy storage circuit 22 gradually rises as the energy storage circuit 22 is charged, when the terminal voltage of the energy storage circuit 22 reaches the on-threshold voltage of the second switch circuit 21 after the preset time period, the second switch circuit 21 is turned on, the third resistor R3 and the second resistor R2 are connected in parallel and then form a resistor voltage dividing circuit with the first resistor R1, the equivalent resistor resistance of the third resistor R3 and the second resistor R2 which are connected in parallel is reduced, the second voltage is reduced, at the moment, the second voltage reaches the threshold of the turn-on voltage of the first switch circuit 10, the first switch circuit 10 is turned on, and the received power supply signal is output to the rear-end load, so that the accurate control of the power supply output time sequence is realized.
The energy storage circuit 22 may adopt an energy storage structure such as an energy storage battery, an energy storage capacitor C1, and in one embodiment, to simplify the circuit structure, as shown in fig. 3, the energy storage circuit 22 includes an energy storage capacitor C1.
The second switch circuit 21 may employ a switching device with a controlled function, in an embodiment, the second switch circuit 21 includes an electronic switch, and the electronic switch may be a metal oxide semiconductor transistor or a triode, and in an embodiment, as shown in fig. 3, the electronic switch is an NPN transistor Q1, a drain of the NPN transistor Q1 is a first end of the second switch circuit 21, a gate of the NPN transistor Q1 is a controlled end of the second switch circuit 21, a source of the NPN transistor Q1 is a second end of the second switch circuit 21, when the terminal voltage of the energy storage circuit 22 reaches a threshold turn-on voltage of the NPN transistor Q1, for example, 0.7V, the NPN transistor Q1 is turned on, and the third resistor R3 is connected in parallel with the second resistor R2 to output the second voltage.
Referring to fig. 3, in an embodiment, the power output circuit further includes an output filter circuit 30 for filtering, the output filter circuit 30 filters the power signal to improve the quality of the power signal, a power input terminal of the output filter circuit 30 is connected to a power output terminal of the first switch circuit 10, the power output terminal of the output filter circuit 30 is the power output terminal of the power output circuit, and the output filter circuit 30 may have a multi-capacitor or single-capacitor structure.
In order to ensure reliable output of power signals of the power output circuit between multiple times of power-on, as shown in fig. 4, the resistance adjustable circuit 20 further includes a bleeder circuit 23, the bleeder circuit 23 is connected in parallel to two ends of the energy storage circuit 22, when the power output circuit is powered on, the bleeder circuit 23 does not work, when the power output circuit is powered off, the bleeder circuit 23 bleeds the charging power of the energy storage circuit 22 during power-on, thereby avoiding the change of the power output timing sequence caused by the direct conduction of the second switch circuit 21 during the next power-on, and ensuring the reliable switching conduction of the second switch during the next power-on.
As shown in fig. 5, the utility model also provides a power output device, this power output device includes a plurality of power output circuit, and this power output circuit's concrete structure refers to above-mentioned embodiment, because this power output device has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. The power output circuits are electrically connected with the loads one by one respectively.
In this embodiment, each power output circuit changes the on time points of the first switch circuit 10 and the second switch circuit 21 by setting the resistor and the energy storage capacitor C1 with different parameters, so that the power output of each power output circuit is output according to a preset time sequence.
In one embodiment, the power output apparatus further includes a power module 300, and a plurality of power terminals of the power module 300 are electrically connected to the power input terminals of the power output circuits one by one, respectively.
The power module 300 is configured to provide power signals for each power output circuit, where the voltages of the power signals received by each power output circuit may be equal or different, the power module 300 synchronously outputs a plurality of power signals to each power output circuit, and each power output circuit outputs a plurality of power signals to a corresponding connected load according to a preset time sequence, so as to ensure that each load is powered on and operates at the preset time sequence.
The utility model discloses still provide a display device, this display device includes power output device, and this power output device's concrete structure refers to above-mentioned embodiment, because this display device has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.
In this embodiment, the power output device may be a power supply device of a display panel or a power supply device of a backlight source, and the power module 300 may be a corresponding battery circuit or a switch power circuit, and provides power signals with a preset time sequence for multiple modules in the display device through the power output device, so that the display device can be powered on reliably.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A power output circuit is characterized by comprising a first switch circuit, a first resistor and a resistor adjustable circuit;
the power input end of the first switch circuit and the first end of the first resistor are connected together to form the power input end of the power output circuit, and the second end of the first resistor, the power end of the resistor adjustable circuit and the controlled end of the first switch circuit are interconnected;
the resistance adjustable circuit is used for outputting a first preset resistance value of a resistor when a power supply input end of the power supply output circuit initially receives a power supply signal so that the first switch circuit receives a first voltage, and outputting a second preset resistance value of the resistor after a preset time length so that the first switch circuit receives a second voltage;
the first switch circuit is used for being switched off when receiving the first voltage, and being switched on and outputting the power supply signal when receiving the second voltage.
2. The power output circuit of claim 1, wherein the resistance adjustable circuit comprises a second resistor, a third resistor, a fourth resistor, a tank circuit, and a second switching circuit;
the first end of the second resistor, the first end of the third resistor and the first end of the fourth resistor are connected together to form a power supply end of the resistor adjustable circuit, the second end of the third resistor is connected with the first end of the second switch circuit, the second end of the fourth resistor, the controlled end of the second switch circuit and the first end of the energy storage circuit are interconnected, and the second end of the energy storage circuit, the second end of the second switch circuit and the second end of the second resistor are all grounded;
the energy storage circuit is used for controlling the second switch circuit to be switched off during initial charging and controlling the second switch circuit to be switched on after charging for a preset time.
3. The power output circuit of claim 2, wherein the energy storage circuit comprises an energy storage capacitor.
4. The power output circuit of claim 2, wherein the second switching circuit comprises an electronic switching tube.
5. The power output circuit of claim 4, wherein the electronic switching device is an NPN transistor.
6. The power output circuit of claim 1, wherein the first switching circuit comprises a switching chip or a metal oxide semiconductor transistor.
7. The power output circuit of claim 1, further comprising an output filter circuit for filtering, a power input of the output filter circuit being connected to a power output of the first switch circuit, a power output of the output filter circuit being a power output of the power output circuit.
8. A power output device, comprising a plurality of power output circuits as claimed in any one of claims 1 to 7, wherein the plurality of power output circuits are electrically connected to a plurality of loads one by one.
9. The power output device of claim 8, further comprising a power module, wherein the power terminals of the power module are electrically connected to the power input terminals of the power output circuits one by one.
10. A display device characterized by comprising a plurality of loads and the power output device according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332922.2U CN214125131U (en) | 2020-12-30 | 2020-12-30 | Power output circuit, power output device and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332922.2U CN214125131U (en) | 2020-12-30 | 2020-12-30 | Power output circuit, power output device and display device |
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| Publication Number | Publication Date |
|---|---|
| CN214125131U true CN214125131U (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023332922.2U Active CN214125131U (en) | 2020-12-30 | 2020-12-30 | Power output circuit, power output device and display device |
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| Country | Link |
|---|---|
| CN (1) | CN214125131U (en) |
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2020
- 2020-12-30 CN CN202023332922.2U patent/CN214125131U/en active Active
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