CN109121246B - Control circuit of LED on server and server - Google Patents
Control circuit of LED on server and server Download PDFInfo
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- CN109121246B CN109121246B CN201810818656.2A CN201810818656A CN109121246B CN 109121246 B CN109121246 B CN 109121246B CN 201810818656 A CN201810818656 A CN 201810818656A CN 109121246 B CN109121246 B CN 109121246B
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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]
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Abstract
本发明公开了一种服务器上发光二极体的控制电路及服务器，包括控制晶片、开关管及用于在控制晶片上电时，将开关管的控制端输入的高电平拉低成低电平的电平下拉电路，其中：控制晶片的控制端与开关管的控制端连接，开关管的第一端与发光二极体的阴极连接，发光二极体的阳极与直流电源的输出端连接，开关管的第二端接地；控制晶片用于在自身上电完成后，控制电平下拉电路停止拉低开关管的控制端后期输入的高电平，以恢复发光二极体的正常控制。与现有技术相比，本申请加入电平下拉电路，从而防止经验不足的管理人员在控制晶片上电时，误判服务器系统的状态，进而提高了服务器的管理效果。
The invention discloses a control circuit of a light-emitting diode on a server and the server, including a control chip, a switch tube, and a control chip for pulling down a high level input from a control end of the switch tube to a low power level when the control chip is powered on. Flat level pull-down circuit, wherein: the control terminal of the control chip is connected to the control terminal of the switch tube, the first end of the switch tube is connected to the cathode of the light-emitting diode, and the anode of the light-emitting diode is connected to the output terminal of the DC power supply , the second end of the switch tube is grounded; the control chip is used to control the level pull-down circuit to stop pulling down the later input high level of the control end of the switch tube after the power-on is completed, so as to restore the normal control of the light-emitting diode. Compared with the prior art, the present application adds a level pull-down circuit, thereby preventing inexperienced managers from misjudging the state of the server system when the control chip is powered on, thereby improving the management effect of the server.
Description
Technical Field
The present invention relates to the technical field of servers, and in particular, to a control circuit for a light emitting diode on a server and a server.
Background
At present, a plurality of light emitting diodes are installed on a server, and the light emitting states of the light emitting diodes correspond to each other to represent various states of the server system. Referring to fig. 1, fig. 1 is a schematic structural diagram of a control circuit of a light emitting diode on a server in the prior art, fig. 1 only shows the control circuit of any light emitting diode D on the server, and the control circuits of the remaining light emitting diodes are shown in fig. 1. In fig. 1, the control chip controls the on or off of the controllable switch K according to the state of the server system corresponding to the led D, so as to control the light emitting state of the led D, so that the manager of the server can determine the state of the server system by checking the light emitting state of the led D.
When the server is powered on, the control chip is also powered on, however, when the control chip is powered on, the control terminal of the control chip outputs a short-time high-level signal to make the light emitting diode D flash once, so that the management personnel with insufficient experience can easily misjudge the state of the server system, and if the management personnel misjudge, the management effect of the server can be affected.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a control circuit of a light emitting diode on a server and the server, wherein a level pull-down circuit is added, so that an inexperienced manager is prevented from misjudging the state of a server system when a control chip is powered on, and the management effect of the server is further improved.
In order to solve the above technical problem, the present invention provides a control circuit for a light emitting diode on a server, including a control chip, a switching tube, and a level pull-down circuit for pulling down a high level input by a control terminal of the switching tube to a low level when the control chip is powered on, wherein:
the control end of the control chip is connected with the control end of the switch tube, the first end of the switch tube is connected with the cathode of the light-emitting diode, the anode of the light-emitting diode is connected with the output end of the direct-current power supply, and the second end of the switch tube is grounded;
the control wafer is used for controlling the level pull-down circuit to stop pulling down the high level input at the later stage of the control end of the switch tube after the control wafer is electrified so as to recover the normal control of the light emitting diode.
Preferably, the level pull-down circuit includes a switch and a pull-down resistor, wherein:
the first end of the switch is respectively connected with the control end of the control wafer and the control end of the switch tube, the second end of the switch is connected with the first end of the pull-down resistor, and the second end of the pull-down resistor is grounded;
the control chip is specifically configured to control the switch to be turned on before the power is turned off, and to control the switch to be turned off after the power is turned on, so as to recover the normal control of the light emitting diode.
Preferably, the switching tube is specifically an NMOS tube, a gate of the NMOS tube is used as a control end of the switching tube, a drain of the NMOS tube is used as a first end of the switching tube, and a source of the NMOS tube is used as a second end of the switching tube;
the control chip is specifically configured to control the on/off state of the NMOS transistor in a voltage driving manner according to the state of the server system, so as to control the light emitting state of the light emitting diode.
Preferably, the switch tube is specifically a bipolar transistor, a gate or a base of the bipolar transistor is used as a control end of the switch tube, a drain or a collector of the bipolar transistor is used as a first end of the switch tube, and a source or an emitter of the bipolar transistor is used as a second end of the switch tube;
the control chip is specifically configured to control the on-off state of the bipolar transistor in a current driving manner according to the state of the server system, so as to control the light emitting state of the light emitting diode correspondingly.
Preferably, the control chip is further configured to adjust the light-emitting brightness of the light-emitting diode by adjusting the magnitude of the driving current input to the bipolar transistor, so as to represent different states of the server system by using different brightnesses of one light-emitting diode in a one-to-one correspondence manner.
Preferably, the bipolar transistor is specifically an insulated gate bipolar transistor IGBT.
In order to solve the above technical problem, the present invention further provides a server, including any one of the above control circuits for led on the server.
The invention provides a control circuit of a light emitting diode on a server, which comprises a control wafer, a switching tube and a level pull-down circuit, wherein the level pull-down circuit is used for pulling down a high level input by a control end of the switching tube into a low level when the control wafer is electrified, and the control circuit comprises: the control end of the control chip is connected with the control end of the switch tube, the first end of the switch tube is connected with the cathode of the light-emitting diode, the anode of the light-emitting diode is connected with the output end of the direct current power supply, and the second end of the switch tube is grounded; the control chip is used for controlling the level pull-down circuit to stop pulling down the high level input at the later stage of the control end of the switch tube after the control chip is electrified so as to recover the normal control of the light emitting diode.
Compared with the control circuit of the light emitting diode on the server in the prior art, the level pull-down circuit is added, when the control chip is electrified, the control end of the control chip can output a transient high-level signal, at the moment, the level pull-down circuit can convert the transient high-level signal into a low-level signal, and the light emitting diode cannot flicker once. After the control wafer is electrified, the control wafer controls the level pull-down circuit to stop pulling down the high level input at the later stage of the control end of the switch tube so as to recover the normal control of the light-emitting diode, namely, the switch tube is correspondingly controlled to be switched on or switched off according to the state of the server system, and then the light-emitting state of the light-emitting diode is correspondingly controlled, so that a manager with insufficient experience is prevented from misjudging the state of the server system when the control wafer is electrified, and the management effect of the server is improved.
The invention also provides a server which has the same beneficial effects as the control circuit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a control circuit of an LED on a server in the prior art;
FIG. 2 is a schematic diagram of a control circuit of an LED on a server according to the present invention;
fig. 3 is a schematic structural diagram of another led control circuit on a server according to the present invention.
Detailed Description
The core of the invention is to provide a control circuit of a light emitting diode on a server and the server, and a level pull-down circuit is added, so that a manager with insufficient experience is prevented from misjudging the state of a server system when a control chip is electrified, and the management effect of the server is further improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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. 2, fig. 2 is a schematic structural diagram of a control circuit of a light emitting diode on a server according to the present invention.
The control circuit comprises a control wafer 1, a switch tube 2 and a level pull-down circuit 3 for pulling down a high level input by a control end of the switch tube 2 into a low level when the control wafer 1 is electrified, wherein:
the control end of the control chip 1 is connected with the control end of the switch tube 2, the first end of the switch tube 2 is connected with the cathode of the light emitting diode D, the anode of the light emitting diode D is connected with the output end of the DC power supply, and the second end of the switch tube 2 is grounded;
the control chip 1 is used for controlling the level pull-down circuit 3 to stop pulling down the high level input at the later stage of the control end of the switch tube 2 after the self power-on is completed, so as to recover the normal control of the light emitting diode D.
It should be noted that fig. 2 only shows the control circuit of any one led D on the server, and the control circuits of the remaining leds can be obtained by referring to fig. 2.
Specifically, the control circuit of the present application includes a control chip 1, a switching tube 2 and a level pull-down circuit 3, and the working principle thereof is as follows:
1) when the server is powered up, the control chip 1 is also being powered up. When the control chip 1 is powered on, the control end of the control chip will output a short-time high level signal, but due to the existence of the level pull-down circuit 3, the short-time high level signal output by the control end of the control chip 1 will be pulled down to be a low level signal, so the switch tube 2 will not be conducted at this time, the light emitting diode D will not emit light, i.e. the light emitting diode D will not flash once, thereby preventing the management personnel with insufficient experience from misjudging the state of the server system due to the flash of the light emitting diode D, and further improving the management effect of the server.
2) After the control chip 1 is powered on, if the level pull-down circuit 3 continues to function, the control terminal of the control chip 1 is pulled down once outputting a high level signal, so that the light emitting state of the led D cannot be normally controlled, therefore, after the control chip 1 is powered on, the level pull-down circuit 3 is controlled to stop pulling down the high level signal output by the control terminal of the control chip 1 in the later stage (i.e. the high level signal input by the control terminal of the switch tube 2 in the later stage), so as to recover the normal control of the led D, i.e. the switch tube 2 is correspondingly controlled to be turned on or off according to the state of the server system, and further the light emitting state of the led D is correspondingly controlled, so that a manager of the server can correspondingly determine the state of the server system by checking the light emitting state of the led D.
The invention provides a control circuit of a light emitting diode on a server, which comprises a control wafer, a switching tube and a level pull-down circuit, wherein the level pull-down circuit is used for pulling down a high level input by a control end of the switching tube into a low level when the control wafer is electrified, and the control circuit comprises: the control end of the control chip is connected with the control end of the switch tube, the first end of the switch tube is connected with the cathode of the light-emitting diode, the anode of the light-emitting diode is connected with the output end of the direct current power supply, and the second end of the switch tube is grounded; the control chip is used for controlling the level pull-down circuit to stop pulling down the high level input at the later stage of the control end of the switch tube after the control chip is electrified so as to recover the normal control of the light emitting diode.
Compared with the control circuit of the light emitting diode on the server in the prior art, the level pull-down circuit is added, when the control chip is electrified, the control end of the control chip can output a transient high-level signal, at the moment, the level pull-down circuit can convert the transient high-level signal into a low-level signal, and the light emitting diode cannot flicker once. After the control wafer is electrified, the control wafer controls the level pull-down circuit to stop pulling down the high level input at the later stage of the control end of the switch tube so as to recover the normal control of the light-emitting diode, namely, the switch tube is correspondingly controlled to be switched on or switched off according to the state of the server system, and then the light-emitting state of the light-emitting diode is correspondingly controlled, so that a manager with insufficient experience is prevented from misjudging the state of the server system when the control wafer is electrified, and the management effect of the server is improved.
On the basis of the above-described embodiment:
referring to fig. 3, fig. 3 is a schematic structural diagram of another led control circuit on a server according to the present invention.
As a preferred embodiment, the level pull-down circuit 3 includes a switch Q and a pull-down resistor R, wherein:
the first end of the switch Q is respectively connected with the control end of the control wafer 1 and the control end of the switch tube 2, the second end of the switch Q is connected with the first end of the pull-down resistor R, and the second end of the pull-down resistor R is grounded;
the control chip 1 is specifically used to control the switch Q to be turned on before the power is turned off, and to control the switch Q to be turned off after the power is turned on, so as to resume the normal control of the light emitting diode D.
Specifically, the level pull-down circuit 3 of the present application includes a switch Q and a pull-down resistor R, and before the control chip 1 is powered off, the control chip 1 will control the switch Q to be closed. When the control chip 1 is powered on, the control end of the control chip will output a transient high level signal, and at this time, the pull-down resistor R will pull down the transient high level signal output by the control end of the control chip 1 into a low level signal, so as to prevent the light emitting diode D from flashing once; when the control chip 1 is powered on, the control chip 1 controls the switch Q to be turned off, so that the pull-down resistor R loses the function of the pull-down level, thereby recovering the normal control of the light emitting diode D.
As a preferred embodiment, the switching tube 2 is specifically an NMOS tube, a gate of the NMOS tube serves as a control end of the switching tube 2, a drain of the NMOS tube serves as a first end of the switching tube 2, and a source of the NMOS tube serves as a second end of the switching tube 2;
the control chip 1 is specifically used to control the on/off state of the NMOS transistor in a voltage driving manner according to the state of the server system, so as to control the light emitting state of the led D accordingly.
Specifically, the switch tube 2 of the present application may be an NMOS tube, and the NMOS tube (metal oxide semiconductor field effect transistor) is a voltage-driven transistor, so that the control chip 1 correspondingly controls the on-off state of the NMOS tube in a voltage-driven manner according to the state of the server system to which the switch tube belongs.
As a preferred embodiment, the switch tube 2 is specifically a bipolar transistor, a gate or a base of the bipolar transistor is used as the control terminal of the switch tube 2, a drain or a collector of the bipolar transistor is used as the first terminal of the switch tube 2, and a source or an emitter of the bipolar transistor is used as the second terminal of the switch tube 2;
the control chip 1 is specifically configured to control the on/off state of the bipolar transistor in a current driving manner according to the state of the server system, so as to control the light emitting state of the light emitting diode D accordingly.
Specifically, the switch tube 2 of the present application may be a bipolar transistor, and the bipolar transistor is a current-driven transistor, and the control chip 1 correspondingly controls the on-off state of the bipolar transistor in a current-driven manner according to the state of the server system to which the bipolar transistor belongs.
As a preferred embodiment, the control chip 1 is further configured to adjust the brightness of the leds D by adjusting the magnitude of the driving current input to the bipolar transistor, so as to utilize different brightness of one led D to represent different states of the server system in a one-to-one correspondence.
Further, considering that the current flowing through the first terminal of the current-driven transistor will change when the magnitude of the high-level signal inputted to the control terminal of the current-driven transistor changes, that is, based on the current-driven transistor, the control chip 1 can control not only the light emission or non-light emission of the light-emitting diode D, but also the light emission luminance of the light-emitting diode D, specifically, adjust the light emission luminance of the light-emitting diode D by adjusting the magnitude of the driving current inputted to the bipolar transistor. It can be seen that, if a led D has multiple lighting states (e.g. no lighting, low brightness, medium brightness, high brightness), and one lighting state represents one state of the server system, compared with the led D having two states of constant lighting and no lighting, the led D can represent more states of the server system one by one, so that the current-driven transistor is adopted, the number of leds D required by the server system is less, and the cost is saved.
As a preferred embodiment the bipolar transistor is in particular an insulated gate bipolar transistor IGBT.
Further, the Bipolar Transistor of the present application may be an Insulated Gate Bipolar Transistor (IGBT), and the IGBT has advantages of both high input impedance and low on-state voltage drop. Of course, the bipolar transistor of the present application may also be an NPN-type triode, and the present application is not limited herein.
The invention also provides a server which comprises the control circuit of the LED on any server.
For the introduction of the server provided in the present application, reference is made to the above-mentioned control circuit embodiment, and details of the server are not repeated herein.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A control circuit of LED on server is featured as setting control chip, switch tube and level pull-down circuit for pulling down high level inputted from control end of switch tube to low level when control chip is powered on, setting control chip to be on-off state when control chip is powered on, setting control chip to be off state when control chip is powered on, setting:
the control end of the control chip is connected with the control end of the switch tube, the first end of the switch tube is connected with the cathode of the light-emitting diode, the anode of the light-emitting diode is connected with the output end of the direct-current power supply, and the second end of the switch tube is grounded;
the control chip is used for controlling the level pull-down circuit to stop pulling down the high level input at the later stage of the control end of the switch tube after the control chip is electrified so as to recover the normal control of the light emitting diode;
the level pull-down circuit comprises a switch and a pull-down resistor, wherein:
the first end of the switch is respectively connected with the control end of the control wafer and the control end of the switch tube, the second end of the switch is connected with the first end of the pull-down resistor, and the second end of the pull-down resistor is grounded;
the control chip is specifically configured to control the switch to be turned on before the power is turned off, and to control the switch to be turned off after the power is turned on, so as to recover the normal control of the light emitting diode.
2. The control circuit of claim 1, wherein the switch transistor is an NMOS transistor, a gate of the NMOS transistor is used as a control terminal of the switch transistor, a drain of the NMOS transistor is used as a first terminal of the switch transistor, and a source of the NMOS transistor is used as a second terminal of the switch transistor;
the control chip is specifically configured to control the on/off state of the NMOS transistor in a voltage driving manner according to the state of the server system, so as to control the light emitting state of the light emitting diode.
3. The control circuit of the led on the server according to claim 1, wherein the switch transistor is a bipolar transistor, a gate or a base of the bipolar transistor is used as the control terminal of the switch transistor, a drain or a collector of the bipolar transistor is used as the first terminal of the switch transistor, and a source or an emitter of the bipolar transistor is used as the second terminal of the switch transistor;
the control chip is specifically configured to control the on-off state of the bipolar transistor in a current driving manner according to the state of the server system, so as to control the light emitting state of the light emitting diode correspondingly.
4. The control circuit of claim 3, wherein the control chip is further configured to adjust the brightness of the LED by adjusting the driving current inputted to the bipolar transistor, so as to utilize different brightness of an LED to represent different states of the server system in a one-to-one correspondence.
5. Control circuit for light emitting diodes on servers according to claim 4, characterised in that the bipolar transistors are in particular insulated gate bipolar transistors IGBT.
6. A server, comprising a control circuit for a light emitting diode on a server according to any of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818656.2A CN109121246B (en) | 2018-07-24 | 2018-07-24 | Control circuit of LED on server and server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818656.2A CN109121246B (en) | 2018-07-24 | 2018-07-24 | Control circuit of LED on server and server |
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| CN109121246A CN109121246A (en) | 2019-01-01 |
| CN109121246B true CN109121246B (en) | 2021-02-19 |
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| CN201810818656.2A Active CN109121246B (en) | 2018-07-24 | 2018-07-24 | Control circuit of LED on server and server |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101049048A (en) * | 2004-10-27 | 2007-10-03 | 皇家飞利浦电子股份有限公司 | Startup flicker suppression in a dimmable LED power supply |
| CN202455617U (en) * | 2012-01-30 | 2012-09-26 | 深圳市振邦实业有限公司 | Light-emitting diode (LED) lighting time delay circuit and LED lighting device |
| CN103781220A (en) * | 2012-10-18 | 2014-05-07 | 鸿富锦精密工业（深圳）有限公司 | Light emitting diode control circuit |
| CN105704866A (en) * | 2016-04-26 | 2016-06-22 | 杰华特微电子（杭州）有限公司 | Control circuit and control method |
| CN105960068A (en) * | 2016-07-08 | 2016-09-21 | 上海灿瑞科技股份有限公司 | Circuit for preventing power back flash of LED lamp |
| CN107197571A (en) * | 2017-07-26 | 2017-09-22 | 无锡麟力科技有限公司 | It is a kind of to prevent the BUCK type LED drive circuits of lower electric backflash |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7843147B2 (en) * | 2008-02-01 | 2010-11-30 | Micrel, Incorporated | LED driver circuits and methods |
| CN102306485A (en) * | 2011-09-06 | 2012-01-04 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) driving circuit, liquid crystal display device and LED driving method |
| US20160088704A1 (en) * | 2014-09-22 | 2016-03-24 | Luxtech, Llc | Low flicker alternating current (ac) led driver |
| CN106898302B (en) * | 2017-04-24 | 2019-01-25 | 京东方科技集团股份有限公司 | Pixel circuit control unit, driving method, pixel circuit and display device |
-
2018
- 2018-07-24 CN CN201810818656.2A patent/CN109121246B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101049048A (en) * | 2004-10-27 | 2007-10-03 | 皇家飞利浦电子股份有限公司 | Startup flicker suppression in a dimmable LED power supply |
| CN202455617U (en) * | 2012-01-30 | 2012-09-26 | 深圳市振邦实业有限公司 | Light-emitting diode (LED) lighting time delay circuit and LED lighting device |
| CN103781220A (en) * | 2012-10-18 | 2014-05-07 | 鸿富锦精密工业（深圳）有限公司 | Light emitting diode control circuit |
| CN105704866A (en) * | 2016-04-26 | 2016-06-22 | 杰华特微电子（杭州）有限公司 | Control circuit and control method |
| CN105960068A (en) * | 2016-07-08 | 2016-09-21 | 上海灿瑞科技股份有限公司 | Circuit for preventing power back flash of LED lamp |
| CN107197571A (en) * | 2017-07-26 | 2017-09-22 | 无锡麟力科技有限公司 | It is a kind of to prevent the BUCK type LED drive circuits of lower electric backflash |
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|---|---|
| CN109121246A (en) | 2019-01-01 |
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