CN102695317A - Circuit and method for ensuring normal operation of light source modules - Google Patents
Circuit and method for ensuring normal operation of light source modules Download PDFInfo
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- CN102695317A CN102695317A CN2011100690855A CN201110069085A CN102695317A CN 102695317 A CN102695317 A CN 102695317A CN 2011100690855 A CN2011100690855 A CN 2011100690855A CN 201110069085 A CN201110069085 A CN 201110069085A CN 102695317 A CN102695317 A CN 102695317A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The present invention provides a circuit and a method for ensuring normal operation of light source modules, relating to the technical field of electronics and solving a technical problem of narrow application scope in the prior art. The circuit for ensuring the normal operation of the light source modules comprises a control module and switching circuits. The switching circuits are connected between an electricity input end and an electricity output end of one light source module of at least two light source modules which are in series with each other. When the switching circuits are off, the light source modules operate normally; when the switching circuits are on, the light source modules are shorted out by the switching circuits. The control module, when a fault of one of the light source modules occurs, is used to control the switching circuit that is connected between the electricity input end and the electricity output end of the light source module having a fault, and to switch the switching circuit from off to on status. The circuit and the method are applied to the ensuring of the normal operation of light source modules which are formed by a plurality of modules mutually connected in series.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to a kind of the guarantee circuit of light source module operate as normal and the method for guaranteeing light source module operate as normal.
Background technology
Along with the develop rapidly of electronic technology, inside be provided with the light source module that is constituted by the light source module of mutual series connection (for example LED lamp) electronic equipment or electronic installation application also more and more widely.
When light source module (for example LED lamp) is cascaded use; The electric energy input of light source module links to each other with the electric energy output end of adjacent light source module in a plurality of light source modules that light source module constituted that are cascaded; And/or the electric energy output end of light source module links to each other with the electric energy input of adjacent light source module.Because the light source module that is cascaded; The gross output of all light source modules is bigger; And then can launch the higher light of brightness, still, the light source module of the use that is cascaded is problem if one of them existence is opened circuit; Then entire circuit all can open circuit, and then can cause all light source modules all can't use.
Those skilled in the art have expected increasing in the periphery of light source module the circuit of guaranteeing light source module operate as normal for this reason, for example between the electric energy input of LED lamp and electric energy output end, connect the i.e. method of parallel voltage-stabilizing diode on light source module (be the LED lamp in the patent document) of voltage stabilizing didoe.In this method; One of them LED lamp in the LED of a plurality of series connection lamp opens circuit; And when the voltage difference between LED lamp electric energy input and the electric energy output end reached the conducting voltage of voltage stabilizing didoe, voltage stabilizing didoe just can conducting, during the voltage stabilizing didoe conducting; The LED lamp just can be by the voltage stabilizing didoe short circuit; Like this, the electric energy of electric energy input input still can input to the electric energy input of another adjacent LED lamp of the LED lamp that opens circuit with this again through the electric energy output end of voltage stabilizing didoe and this LED lamp that opens circuit, thereby the LED lamp that guarantees other still can operate as normal.Voltage stabilizing didoe whether conducting depends on the LED lamp electric energy input that opens circuit and the voltage extent between the electric energy output end.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
In the prior art; The current ratio that voltage stabilizing didoe can bear is lower, and many technical parameters of voltage stabilizing didoe and the bigger light source module of power output do not meet, and the current value that can carry with voltage stabilizing didoe is an example; When the power output of light source module is big; The current value of electric current that flows through light source module is bigger, and after the voltage stabilizing didoe conducting, the electric current that before flows through light source module flows through voltage stabilizing didoe; Cause that very easily voltage stabilizing didoe burns, cause in the prior art that there is the narrow technical problem of the scope of application in the method for parallel voltage-stabilizing diode on light source module.
Summary of the invention
The embodiment of the invention provides a kind of circuit and a kind of method of guaranteeing light source module operate as normal of guaranteeing light source module operate as normal, has solved in the prior art that there is the narrow technical problem of the scope of application in the method for parallel voltage-stabilizing diode on light source module.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The circuit of guaranteeing light source module operate as normal that the embodiment of the invention provides comprises control module and the switching circuit that links to each other with said control module, wherein:
Said switching circuit is connected between two electric energy inputs and electric energy output end with the said light source module of wherein at least one of last light source module of mutual series connection;
When said switching circuit breaks off, said light source module operate as normal;
During said switching circuit conducting, said light source module is by said switching circuit short circuit;
Said control module, when being used for that a said light source module breaks down therein, the said switching circuit of control connection between said light source module electric energy input that breaks down and electric energy output end switches to conducting with said switching circuit from disconnection.
Further, said control module, when being used for that a said light source module opens circuit therein, the said switching circuit of control connection between said light source module electric energy input that opens circuit and electric energy output end switches to conducting with said switching circuit from disconnection;
And/or, all be connected with a said switching circuit between the electric energy input of each said light source module and the electric energy output end; And/or said light source module is a semiconductor laser; And/or said switching circuit is relay or semiconductor switch circuit.
Further, the circuit that this guarantees light source module operate as normal comprises the light detection module, wherein:
Said smooth detection module is used to detect the light output valve of each said light source module, and said smooth output valve is imported said control module;
Said control module; Also be used for when the light output valve of said light source module does not meet the normal light output valve of predefined said light source module; The said switching circuit of control connection between said light source module electric energy input and electric energy output end switches to conducting with said switching circuit from disconnection;
Perhaps, the circuit that this guarantees light source module operate as normal comprises the light detection module, wherein:
Said smooth detection module is used to detect two total light output valves with last said light source module, and said smooth output valve is imported said control module;
Said control module; Also be used for when two total light output valves with last said light source module do not meet predefined two normal total light output valves with last said light source module; The said switching circuit of control connection between each said light source module electric energy input and electric energy output end one by one; Said switching circuit is switched to conducting from disconnection; And when latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is the normal total light output valve of a said light source module, the said switching circuit of conducting is switched to disconnection, perhaps; When latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is not the normal total light output valve of a said light source module, keep the said switching circuit of conducting to continue conducting.
Further, said optical detection module is optical detection circuit or luminance sensor.
Further, the equal correspondence of each said light source module is provided with a said smooth detection module, and each said smooth detection module detects the light output valve of a said light source module; Perhaps,
This guarantees to be provided with two with last said smooth detection module in the circuit of light source module operate as normal, and wherein at least one said smooth detection module is used to detect two total light output valves with last said light source module; Perhaps,
This guarantees to be provided with a said smooth detection module in the circuit of light source module operate as normal, and said smooth detection module is used to detect total light output valve of all said light source modules.
Further, said electric energy input also is connected with drive circuit, wherein:
Said drive circuit is used to drive said light source module;
Said control module also is used to control said drive circuit and whether carries out voltage transitions;
And/or, also be connected with excess voltage protection between the said electric energy input of said control module and said light source module, the said electric energy output end, wherein:
Said excess voltage protection is used for when said light source module opens circuit, and said control module is sent triggering signal, makes the said control module that is in resting state or off-mode get into operating state through said triggering signal.
Further, said control module also is connected with the detection pin, on the said electric energy input of each said light source module and be connected with a said detection pin on the said electric energy output end respectively;
Said control module is used for through the said electric energy input of said each said light source module of detection pin senses and the voltage difference between the said electric energy output end, and judges according to the size of said pressure reduction whether said light source module opens circuit.
The method of guaranteeing light source module operate as normal that the embodiment of the invention provided may further comprise the steps:
Connect switching circuit at two of mutual series connection between with the electric energy input of the said light source module of wherein at least one of last light source module and electric energy output end;
When a said light source module broke down therein, the said switching circuit of control connection between said light source module electric energy input that breaks down and electric energy output end switched to conducting with said switching circuit from disconnection;
When said switching circuit breaks off, said light source module operate as normal;
During said switching circuit conducting, said light source module is by said switching circuit short circuit.
Further, the method that this guarantees light source module operate as normal may further comprise the steps:
When a said light source module opened circuit therein, the said switching circuit of control connection between said light source module electric energy input that opens circuit and electric energy output end switched to conducting with said switching circuit from disconnection;
Perhaps, the method that this guarantees light source module operate as normal may further comprise the steps:
Detect the light output valve of each said light source module;
When the light output valve of said light source module does not meet the normal light output valve of predefined said light source module; The said switching circuit of control connection between said light source module electric energy input and electric energy output end switches to conducting with said switching circuit from disconnection;
Perhaps, the method that this guarantees light source module operate as normal may further comprise the steps:
Detect two total light output valves with last said light source module;
When two total light output valves with last said light source module do not meet predefined two normal total light output valves with last said light source module; The said switching circuit of control connection between each said light source module electric energy input and electric energy output end one by one; Said switching circuit is switched to conducting from disconnection; And when latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is the normal total light output valve of a said light source module; The said switching circuit of conducting is switched to disconnection; Perhaps, when latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is not the normal total light output valve of a said light source module, keep the said switching circuit of conducting to continue conducting.
Further, this guarantees the method for light source module operate as normal, and is further comprising the steps of:
Detect the said electric energy input of each said light source module and the voltage difference between the said electric energy output end, and judge according to the size of said pressure reduction whether said light source module opens circuit.
Compared with prior art, the embodiment of the invention provides the technique effect below producing at least in above-mentioned arbitrary technical scheme:
Because the control module that the embodiment of the invention provided; Can be therein light source module when breaking down (for example open circuit, improper short circuit or optical attenuation); The switching circuit of control connection between light source module electric energy input that breaks down and electric energy output end switches to conducting with switching circuit from disconnection, and during the switching circuit conducting; The electric energy of electric energy input output is exported from electric energy output end through switching circuit; At this moment, the light source module that breaks down has been given short circuit by switching circuit, and the electric current that before flows through light source module can flow into the other light sources module that is in series with this light source module that breaks down through the electric energy output end of switching circuit and the light source module that breaks down; So the input of the still old electric energy of other light sources module, and then still can operate as normal;
Simultaneously; Because the value of the electric current that common switching circuit can bear is far longer than common voltage stabilizing didoe; So there is not the problem of burning because the electric current that flows through is excessive in switching circuit; So the scope of the power output of the light source module that the present invention can be suitable for is also bigger, there is the narrow technical problem of the scope of application in the method for parallel voltage-stabilizing diode on light source module so solved in the prior art;
In addition; During common voltage stabilizing didoe conducting; The turn-on voltage that needs is bigger, even voltage stabilizing didoe is also bigger to the loss that circuit caused in turn on process, and only there is the switch two states in common switching circuit; Its loss that can not cause circuit in the switching circuit turn on process is so switching circuit also has the advantage of more saving power consumption for voltage stabilizing didoe.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the sketch map of the annexation between the inside part of the circuit of guaranteeing light source module operate as normal in a kind of execution mode of circuit embodiments 1 provided by the present invention;
Fig. 2 is the sketch map of the annexation between the inside part of the circuit of guaranteeing light source module operate as normal in the another kind of execution mode of circuit embodiments 1 provided by the present invention;
Fig. 3 is the sketch map of the annexation between the inside part of the circuit of guaranteeing light source module operate as normal in another execution mode of circuit embodiments 1 provided by the present invention;
Fig. 4 is the sketch map of the annexation between the inside part of the circuit of guaranteeing light source module operate as normal in another execution mode of circuit embodiments 1 provided by the present invention;
Fig. 5 is the schematic flow sheet of control module operating procedure when guaranteeing in Fig. 2, Fig. 3 and the circuit embodiments provided by the present invention 1 shown in Figure 4 that light source module breaks down in the circuit of light source module operate as normal;
Fig. 6 is the sketch map of the annexation between the inside part of the circuit of guaranteeing light source module operate as normal in a kind of execution mode of circuit embodiments 2 provided by the present invention;
The schematic flow sheet of Fig. 7 control module operating procedure when light source module breaks down in the circuit of guaranteeing light source module operate as normal in the circuit embodiments 2 provided by the present invention shown in Figure 6;
Fig. 8 is the sketch map of the annexation between the inside part of the circuit of guaranteeing light source module operate as normal in a kind of execution mode of circuit embodiments 3 provided by the present invention;
Fig. 9 is for guaranteeing the schematic flow sheet of the method for light source module operate as normal in a kind of execution mode of method embodiment 1 provided by the present invention;
Figure 10 is for guaranteeing the schematic flow sheet of the method for light source module operate as normal in another execution mode of method embodiment 1 provided by the present invention;
Figure 11 is for guaranteeing the schematic flow sheet of the method for light source module operate as normal in a kind of execution mode of method embodiment 2 provided by the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not paying creative work belongs to the scope that the present invention protects.
When the embodiment of the invention provides one of them light source module of light source module of a kind of a plurality of series connection to break down (for example open circuit, improper short circuit or optical attenuation), the circuit of guaranteeing light source module operate as normal and a kind of method of guaranteeing light source module operate as normal that the other light sources module still can operate as normal.
Circuit embodiments 1:
The circuit of guaranteeing light source module operate as normal as shown in Figure 1, that the embodiment of the invention provided comprises control module 1 and the switching circuit 2 that links to each other with control module 1, wherein:
When switching circuit 2 breaks off, light source module 3 operate as normal;
During switching circuit 2 conductings, light source module 3 is by switching circuit 2 short circuits;
In the present embodiment two with last light source module 3 mutually during series connection; The electric energy input IN of light source module 3 links to each other with the electric energy output end OUT of adjacent light source module 3; And/or the electric energy output end OUT of light source module 3 links to each other with the electric energy input IN of adjacent light source module 3;
During switching circuit 2 operate as normal, light source module 3 obtains electric energy and launches light from electric energy input IN; Light source module 3 is during by switching circuit 2 short circuits, and the electric energy of electric energy input IN output is exported from electric energy output end OUT through switching circuit 2.
Because the control module 1 that the embodiment of the invention provided; Can be therein light source module 3 when breaking down (for example open circuit, improper short circuit or optical attenuation); The switching circuit 2 of control connection between the light source module that breaks down 3 electric energy input IN and electric energy output end OUT switches to conducting with switching circuit 2 from disconnection, and during switching circuit 2 conductings; The electric energy of electric energy input IN output is exported from electric energy output end OUT through switching circuit 2; At this moment, the light source module 3 that breaks down has been given short circuit by switching circuit 2, and the electric current that before flows through light source module 3 can flow into the other light sources module 3 that is in series with this light source module that breaks down 3 through the electric energy output end OUT of switching circuit 2 and the light source module that breaks down 3; So the input of the still old electric energy of other light sources module 3, and then still can operate as normal;
Simultaneously; Because the value of the electric current that common switching circuit 2 can bear is far longer than common voltage stabilizing didoe; So there is not the problem of burning because the electric current that flows through is excessive in switching circuit 2; So the scope of the power output of the light source module that the present invention can be suitable for is also bigger, there is the narrow technical problem of the scope of application in the method for parallel voltage-stabilizing diode on light source module so solved in the prior art;
In addition; During common voltage stabilizing didoe conducting; The turn-on voltage that needs is bigger, even voltage stabilizing didoe is also bigger to the loss that circuit caused in turn on process, and only there is the switch two states in common switching circuit 2; Its loss that can not cause circuit in switching circuit 2 turn on process is so switching circuit 2 also has the advantage of more saving power consumption for voltage stabilizing didoe.
As shown in Figure 1, control module 1 in the present embodiment, and when being used for that a light source module 3 opens circuit therein, the switching circuit 2 of control connection between the light source module that opens circuit 3 electric energy input IN and electric energy output end OUT switches to conducting with switching circuit 2 from disconnection;
And/or, all be connected with a switching circuit 2 between the electric energy input IN of each light source module 3 and the electric energy output end OUT.
When one of them light source module 3 opens circuit; The whole light source module all can lose the electric energy input; So this moment, all light source module 3 all can't operate as normal, when a light source module 3 opens circuit therein, after the switching circuit 2 parallelly connected with it switches to conducting from disconnection; This light source module 3 can be by switching circuit 2 short circuits, so the other light sources module 3 in the light source module still can operate as normal.
Because each light source module 3 is all to there being a switching circuit 2; When so whichsoever light source module 3 opens circuit; Light source module 3 pairing switching circuit 2 conductings that all can control and open circuit; Thereby with the light source module that opens circuit 3 short circuits, when guaranteeing that any light source module 3 opens circuit, other light sources module 3 all can operate as normal through switching circuit 2.
As shown in Figure 2, guarantee in the present embodiment circuit of light source module operate as normal also to comprise light detection module 4, wherein:
As shown in Figure 5; Common light source module as shown in Figure 23 is short-circuited or other faults when causing light source module 3 serious optical attenuation to occur; The light output valve of light source module 3 just can not meet the normal light output valve of predefined light source module 3, no matter is which kind of situation, when light source module 3 work are undesired; All need close light source module 3, thereby conveniently detect, keep in repair, dismantle light source module 3.Because when light source module 3 is short-circuited; The light output valve of light source module 3 is very little; But not too big variation of power consumption; Cause light source module 3 can become a thermal source; Because most of electronic devices (for example semiconductor laser) are adapted at constant temperature under working, the 3 pairs of other light sources modules 3 of light source module or other electronic devices that become thermal source can constitute potential safety hazard, and when the light output valve of light source module 3 is very little in the present embodiment; The switching circuit 2 of control module 1 meeting control connection between light source module 3 electric energy input IN and electric energy output end OUT; Switching circuit 2 is switched to conducting from disconnection, and the electric current that flows through the light source module 3 of short circuit before can making it after switching circuit 2 conductings transfers to other light sources module 3 through switching circuit 2, thereby can guarantee that the light source module 3 of short circuit can not have influence on the operate as normal of other light sources module 3 or other electronic devices.
In addition; Because after switching circuit 2 conductings; Be short-circuited or the light source module 3 of other faults has not had electric current to flow through, thus power-down state be in, at this moment; Operating personnel not only can find the light source module 3 that has fault fast, and have dismounting, the also safer convenience of maintenance of fault light source module 3.Light for emission is more dazzling, have for the bigger light source module 3 (for example semiconductor laser) of damageability or power, and this advantage is very meaningful.
The optical detection module is optical detection circuit or luminance sensor in the present embodiment.Optical detection circuit is a kind of special circuit that is applied to detect the light output valve of semiconductor laser in the existing laser equipment that semiconductor laser is set; But the purpose that detects the light output valve of semiconductor laser in the prior art does not lie in judges the whether short circuit of optical detection module.Use optical detection circuit in the present embodiment and can utilize the new function of existing circuit realization in the laser equipment to greatest extent, and then help to save production cost.Luminance sensor is a kind of transducer that can experience brightness and convert usable output signal to, uses luminance sensor also can detect the light output valve of semiconductor laser.Certainly, the optical detection module also can use outside optical detection circuit or the luminance sensor other to have the electronic device or the electronic installation of optical sensor function in the present embodiment.In addition, also can not use the optical detection module in the present embodiment, operating personnel also can judge whether light source module 3 is normal through naked eyes, and then are to break off or conducting through control module 1 control switch circuit 2.
As shown in Figure 2, each light source module 3 equal correspondence is provided with a light detection module 4 in the present embodiment, and each light detection module 4 detects the light output valve of a light source module 3.Whether this design control module 1 can normal through the operating state of light detection module 4 each light source module 3 of understanding; So can in time find to exist the light source module 3 of fault; And then the switching circuit 2 of control connection between light source module 3 electric energy input IN and electric energy output end OUT as early as possible; Switching circuit 2 is switched to conducting from disconnection, thereby can guarantee to exist the light source module 3 of fault can not have influence on the operate as normal of other light sources module 3 or other electronic devices.
As shown in Figure 3, electric energy input IN also is connected with drive circuit 5 in the present embodiment, wherein:
Drive circuit 5 is used for driving light source module 3; Drive circuit 5 is imported through electric energy input IN after can converting the electric energy that does not meet light source module 3 operating voltages into meet light source module 3 operating voltages electric energy;
Drive circuit 5 can play the effect of transformer; When 1 pair of drive circuit of control module 5 sent enabled instruction, the electric energy input IN input of 5 pairs of light source modules 3 of drive circuit met the electric current of its operating voltage, thereby guaranteed the operate as normal of light source module 3; Otherwise; When 1 pair of drive circuit of control module 5 sent out code, drive circuit 5 stopped the electric energy input IN input of light source module 3 is met the electric current of its operating voltage, and the light source module 3 that loses power supply just can be closed.
As shown in Figure 4, control module 1 also is connected with and detects pin 6 in the present embodiment, is connected with one respectively on the electric energy input IN of each light source module 3 and on the electric energy output end OUT and detects pin 6;
Because a plurality of light source modules 3 are cascaded; When one of them light source module 3 opens circuit; Still there is voltage in its electric energy input IN, and its electric energy output end OUT voltage is 0V, at this moment; Control module 1 will inevitably have voltage difference between electric energy input IN and the electric energy output end OUT, so can judge just through detecting this voltage difference whether light source module 3 opens circuit.
Certainly; Also can be provided with between the electric energy input IN of control module 1 and light source module 3 and the electric energy output end OUT in the present embodiment and be specifically designed to the functional unit of judging whether light source module 3 opens circuit; This functional unit detects between electric energy input IN and the electric energy output end OUT whether have voltage difference through detecting pin 6, if exist then control module 1 is sent the data-signal that can express light source module 3 particular locations that open circuit.
In addition, during pairing switching circuit 2 conductings of the light source module of short circuit 3, entire circuit just can be recovered conducting again, thus also can use in the present embodiment switching circuit 2 one by one the way of conducting find out the light source module 3 that short circuit occurs.
Also be connected with excess voltage protection between the electric energy input IN of control module 1 and light source module 3, the electric energy output end OUT in the present embodiment, wherein:
Excess voltage protection; Be used for when light source module 3 opens circuit; Control module 1 is sent triggering signal, be in the control module 1 of resting state or off-mode, make the control module 1 that is in resting state or off-mode get into operating state through start trigger signal.
Excess voltage protection is to be provided with a kind of protective circuit of using always in the circuit of light source module 3; In the time of can opening circuit at the circuit of a plurality of light source modules 3 of connecting; In time wake the control module 1 that is in resting state or off-mode up, and then through the protection of control module 1 realization to other light sources module 3 on the circuit.When light source module 3 operate as normal, can control module 1 be set to resting state or off-mode, when light source module 3 opens circuit; 7 pairs of control modules of overvoltage crowbar 1 are sent triggering signal; Through start trigger signal control module 1, after control module 1 starts, judge it specifically is which light source module 3 problem that opens circuit again; So not only can save the spent electric energy of control module 1, can also prolong the useful life of control module 1.
Circuit embodiments 2:
Like Fig. 6 and shown in Figure 7, present embodiment and embodiment 1 are basic identical, and its difference is: guarantee the circuit of light source module operate as normal in the present embodiment, also comprise light detection module 4, wherein:
The light source module 3 that light detection module 4 is detected in the present embodiment more is so the quantity of employed smooth detection module 4 is inevitable less than embodiment 1, so more save cost in the present embodiment.When one of them light source module 3 in the light source module 3 of a plurality of series connection is short-circuited or other faults when causing light source module 3 serious optical attenuation to occur; The total light output valve of all light source modules 3 is inevitable not to meet normal total light output valve of predefined all light source module 3 yet; At this moment, need to find out specifically be that the light output valve of which light source module 3 is undesired to control module 1.Control module 1 is the switching circuit 2 of control connection between light source module 3 electric energy input IN and electric energy output end OUT one by one; Switching circuit 2 is switched to conducting from disconnection; At this moment, after switching circuit 2 conductings, when the minimizing value of total light output valve of all light source modules 3 is the normal light output valve of a light source module 3; The switching circuit 2 pairing light source module 3 smooth output valves of then representing this conducting are normal; Otherwise, if after switching circuit 2 conductings, the minimizing value of total light output valve of all light source modules 3 during less than the normal light output valve of a light source module 3 or the minimizing value be zero; The switching circuit 2 pairing light source module 3 smooth output valves of then representing this conducting are abnormal, and just can to find out the light output valve of concrete which or which light source module 3 be abnormal to control module 1 like this.
Present embodiment guarantees in the circuit of light source module operate as normal that a light detection module 4 can be used to detect total light output valves of two, three or a plurality of light source modules 3; Guarantee to be preferably in the circuit of light source module operate as normal and be provided with a light detection module 4, light detection module 4 is used to detect total light output valve of all light source modules 3.At this moment, a light detection module 4 just can detect all light source modules 3, thus saved the cost of light detection module 4 to the full extent, and also the I&M of a light detection module 4 comparatively speaking all can be fairly simple, convenient.
Circuit embodiments 3:
As shown in Figure 8; Present embodiment and embodiment 1 are basic identical; Its difference is: guarantee to be provided with in the circuit of light source module operate as normal the individual light detection module 4 that (comprises two more than two) more than two in the present embodiment, wherein at least one light detection module 4 is used to detect two total light output valves with last light source module 3.
Part light source module 3 shared light detection modules 4 in the light source module 3 of a plurality of series connection, remaining each light source module 3 corresponding light detection module 4.Can select the light source module 3 of suitable number like this according to the quantity of light source module 3; Illustrate: if exist odd number for example during seven light source modules 3; Can per three shared one light detection modules 4, last remaining one is detected through a light detection module 4 separately.When a light detection module 4 detects two during with last light source module 3, can use with embodiment 2 similar methods and find the light source module 3 that has fault, thereby there are not light source module 3 operate as normal of fault in assurance.
Method embodiment 1:
The method of guaranteeing light source module operate as normal that the embodiment of the invention provided may further comprise the steps:
S1, connect switching circuit 2 between with the electric energy input IN of last light source module 3 at least one light source module 3 wherein and electric energy output end OUT at two of mutual series connection;
S2, when a light source module 3 breaks down therein, the switching circuit 2 of control connection between the light source module that breaks down 3 electric energy input IN and electric energy output end OUT switches to conducting with switching circuit 2 from disconnection;
When switching circuit 2 breaks off, light source module 3 operate as normal;
During switching circuit 2 conductings, light source module 3 is by switching circuit 2 short circuits.
The method of guaranteeing light source module operate as normal that the embodiment of the invention provided has identical/corresponding specified features with the circuit of guaranteeing light source module operate as normal that the invention described above embodiment 1,2,3 is provided; So not only have unicity, and can solve identical technical problem, the identical technique effect of generation.
Present embodiment is guaranteed the method for light source module operate as normal, may further comprise the steps:
S21, when a said light source module opens circuit therein, the said switching circuit of control connection between said light source module electric energy input that opens circuit and electric energy output end switches to conducting with said switching circuit from disconnection;
Perhaps, present embodiment is guaranteed the method for light source module operate as normal, may further comprise the steps:
S20, detect the light output valve of each light source module 3;
S21, when the light output valve of light source module 3 does not meet the normal light output valve of predefined light source module 3; The switching circuit 2 of control connection between light source module 3 electric energy input IN and electric energy output end OUT switches to conducting with switching circuit 2 from disconnection.
Common light source module as shown in Figure 23 is short-circuited or other faults when causing light source module 3 serious optical attenuation to occur; The light output valve of light source module 3 just can not meet the normal light output valve of predefined light source module 3; No matter be which kind of situation; When light source module 3 work are undesired, all need close light source module 3, thereby conveniently detect, keep in repair, dismantle light source module 3.Because when light source module 3 is short-circuited; The light output valve of light source module 3 is very little; But not too big variation of power consumption; Cause light source module 3 can become a thermal source; Because most of electronic devices (for example semiconductor laser) are adapted at constant temperature under working, the 3 pairs of other light sources modules 3 of light source module or other electronic devices that become thermal source can constitute potential safety hazard, and when the light output valve of light source module 3 is very little in the present embodiment; The switching circuit 2 of control module 1 meeting control connection between light source module 3 electric energy input IN and electric energy output end OUT; Switching circuit 2 is switched to conducting from disconnection, and the electric current that flows through the light source module 3 of short circuit before can making it after switching circuit 2 conductings transfers to other light sources module 3 through switching circuit 2, thereby can guarantee that the light source module 3 of short circuit can not have influence on the operate as normal of other light sources module 3 or other electronic devices.
In addition; Because after switching circuit 2 conductings; Be short-circuited or the light source module 3 of other faults has not had electric current to flow through, thus power-down state be in, at this moment; Operating personnel not only can find the light source module 3 that has fault fast, and have dismounting, the also safer convenience of maintenance of fault light source module 3.Light for emission is more dazzling, have for the bigger light source module 3 (for example semiconductor laser) of damageability or power, and this advantage is very meaningful.
Present embodiment is guaranteed the method for light source module operate as normal, and is further comprising the steps of:
S20, the electric energy input IN that detects each light source module 3 and the voltage difference between the electric energy output end OUT, and judge according to the size of pressure reduction whether light source module 3 opens circuit.
Because the light source module that a plurality of light source modules 3 are cascaded and are constituted; When one of them light source module 3 opens circuit; Still there is voltage in its electric energy input IN, and its electric energy output end OUT voltage is 0V, at this moment; Will inevitably there be voltage difference between electric energy input IN and the electric energy output end OUT, so can judge just whether light source module 3 opens circuit through detecting this voltage difference.
Method embodiment 2:
The embodiment of the invention and the invention described above method embodiment 1 are basic identical, and its difference is, guarantees the method for light source module operate as normal in the present embodiment, may further comprise the steps:
S20, two total light output valves of detection with last light source module 3;
S21, when two total light output valves with last light source module 3 do not meet predefined two normal total light output valves with last light source module 3; The switching circuit 2 of control connection between each light source module 3 electric energy input IN and electric energy output end OUT one by one; Switching circuit 2 is switched to conducting from disconnection; And when latter two minimizing value with total light output valve of last light source module 3 of switching circuit 2 conductings is the normal total light output valve of a light source module 3; The switching circuit 2 of conducting is switched to disconnection; Perhaps, when latter two minimizing value with total light output valve of last light source module 3 of switching circuit 2 conductings is not the normal total light output valve of a light source module 3, keep the switching circuit 2 of conducting to continue conductings;
S22, upgrade normal total light output valve of predefined light source module 3 according to the number of the switching circuit 2 pairing light source modules 3 that break off;
S23, repeating step S20, step S21 and step S22.
When two of each detections during with the total light output valve of last light source module 3; For the light output valve of a light source module 3 of each detection among the inventive method embodiment 1; Needed checkout equipment (for example the light detection module 4) and detection time number average can reduce, so more save cost.
When one of them light source module 3 in the light source module 3 of a plurality of series connection is short-circuited or other faults when causing light source module 3 serious optical attenuation to occur; The total light output valve of all light source modules 3 is inevitable not to meet normal total light output valve of predefined all light source module 3 yet; At this moment, need to find out specifically be that the light output valve of which light source module 3 is undesired to control module 1.Control module 1 is the switching circuit 2 of control connection between light source module 3 electric energy input IN and electric energy output end OUT one by one; Switching circuit 2 is switched to conducting from disconnection; At this moment, after switching circuit 2 conductings, when the minimizing value of total light output valve of all light source modules 3 is the normal light output valve of a light source module 3; The switching circuit 2 pairing light source module 3 smooth output valves of then representing this conducting are normal; Otherwise, if after switching circuit 2 conductings, the minimizing value of total light output valve of all light source modules 3 during less than the normal light output valve of a light source module 3 or the minimizing value be zero; The switching circuit 2 pairing light source module 3 smooth output valves of then representing this conducting are abnormal, and just can to find out the light output valve of concrete which or which light source module 3 be abnormal to control module 1 like this.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. circuit of guaranteeing light source module operate as normal is characterized in that: comprise control module and the switching circuit that links to each other with said control module, wherein:
Said switching circuit is connected between two electric energy inputs and electric energy output end with the said light source module of wherein at least one of last light source module of mutual series connection;
When said switching circuit breaks off, said light source module operate as normal;
During said switching circuit conducting, said light source module is by said switching circuit short circuit;
Said control module, when being used for that a said light source module breaks down therein, the said switching circuit of control connection between said light source module electric energy input that breaks down and electric energy output end switches to conducting with said switching circuit from disconnection.
2. the circuit of guaranteeing light source module operate as normal according to claim 1; It is characterized in that: said control module; When being used for that a said light source module opens circuit therein; The said switching circuit of control connection between said light source module electric energy input that opens circuit and electric energy output end switches to conducting with said switching circuit from disconnection;
And/or, all be connected with a said switching circuit between the electric energy input of each said light source module and the electric energy output end;
And/or said light source module is a semiconductor laser;
And/or said switching circuit is metal-oxide-semiconductor, triode or relay.
3. the circuit of guaranteeing light source module operate as normal according to claim 2 is characterized in that: the circuit that this guarantees light source module operate as normal, comprise the light detection module, wherein:
Said smooth detection module is used to detect the light output valve of each said light source module, and said smooth output valve is imported said control module;
Said control module; Also be used for when the light output valve of said light source module does not meet the normal light output valve of predefined said light source module; The said switching circuit of control connection between said light source module electric energy input and electric energy output end switches to conducting with said switching circuit from disconnection;
Perhaps, the circuit that this guarantees light source module operate as normal comprises the light detection module, wherein:
Said smooth detection module is used to detect two total light output valves with last said light source module, and said smooth output valve is imported said control module;
Said control module; Also be used for when two total light output valves with last said light source module do not meet predefined two normal total light output valves with last said light source module; The said switching circuit of control connection between each said light source module electric energy input and electric energy output end one by one; Said switching circuit is switched to conducting from disconnection; And when latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is the normal total light output valve of a said light source module, the said switching circuit of conducting is switched to disconnection, perhaps; When latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is not the normal total light output valve of a said light source module, keep the said switching circuit of conducting to continue conducting.
4. the circuit of guaranteeing light source module operate as normal according to claim 3 is characterized in that: said optical detection module is optical detection circuit or luminance sensor.
5. the circuit of guaranteeing light source module operate as normal according to claim 3 is characterized in that:
The equal correspondence of each said light source module is provided with a said smooth detection module, and each said smooth detection module detects the light output valve of a said light source module; Perhaps,
This guarantees to be provided with two with last said smooth detection module in the circuit of light source module operate as normal, and wherein at least one said smooth detection module is used to detect two total light output valves with last said light source module; Perhaps,
This guarantees to be provided with a said smooth detection module in the circuit of light source module operate as normal, and said smooth detection module is used to detect total light output valve of all said light source modules.
6. the circuit of guaranteeing light source module operate as normal according to claim 2 is characterized in that: said electric energy input also is connected with drive circuit, wherein:
Said drive circuit is used to drive said light source module;
Said control module also is used to control said drive circuit and whether carries out voltage transitions;
And/or, also be connected with excess voltage protection between the said electric energy input of said control module and said light source module, the said electric energy output end, wherein:
Said excess voltage protection is used for when said light source module opens circuit, and said control module is sent triggering signal, makes the said control module that is in resting state or off-mode get into operating state through said triggering signal.
7. the circuit of guaranteeing light source module operate as normal according to claim 6; It is characterized in that: said control module also is connected with the detection pin, on the said electric energy input of each said light source module and be connected with a said detection pin on the said electric energy output end respectively;
Said control module is used for through the said electric energy input of said each said light source module of detection pin senses and the voltage difference between the said electric energy output end, and judges according to the size of said pressure reduction whether said light source module opens circuit.
8. method of guaranteeing light source module operate as normal is characterized in that: may further comprise the steps:
Connect switching circuit at two of mutual series connection between with the electric energy input of the said light source module of wherein at least one of last light source module and electric energy output end;
When a said light source module broke down therein, the said switching circuit of control connection between said light source module electric energy input that breaks down and electric energy output end switched to conducting with said switching circuit from disconnection;
When said switching circuit breaks off, said light source module operate as normal;
During said switching circuit conducting, said light source module is by said switching circuit short circuit.
9. the method for guaranteeing light source module operate as normal according to claim 8 is characterized in that: the method that this guarantees light source module operate as normal may further comprise the steps:
When a said light source module opened circuit therein, the said switching circuit of control connection between said light source module electric energy input that opens circuit and electric energy output end switched to conducting with said switching circuit from disconnection;
Perhaps, the method that this guarantees light source module operate as normal may further comprise the steps:
Detect the light output valve of each said light source module;
When the light output valve of said light source module does not meet the normal light output valve of predefined said light source module; The said switching circuit of control connection between said light source module electric energy input and electric energy output end switches to conducting with said switching circuit from disconnection;
Perhaps, the method that this guarantees light source module operate as normal may further comprise the steps:
Detect two total light output valves with last said light source module;
When two total light output valves with last said light source module do not meet predefined two normal total light output valves with last said light source module; The said switching circuit of control connection between each said light source module electric energy input and electric energy output end one by one; Said switching circuit is switched to conducting from disconnection; And when latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is the normal total light output valve of a said light source module; The said switching circuit of conducting is switched to disconnection; Perhaps, when latter two minimizing value with total light output valve of last said light source module of said switching circuit conducting is not the normal total light output valve of a said light source module, keep the said switching circuit of conducting to continue conducting.
10. the method for guaranteeing light source module operate as normal according to claim 9 is characterized in that: this guarantees the method for light source module operate as normal, and is further comprising the steps of:
Detect the said electric energy input of each said light source module and the voltage difference between the said electric energy output end, and judge according to the size of said pressure reduction whether said light source module opens circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100690855A CN102695317A (en) | 2011-03-22 | 2011-03-22 | Circuit and method for ensuring normal operation of light source modules |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100690855A CN102695317A (en) | 2011-03-22 | 2011-03-22 | Circuit and method for ensuring normal operation of light source modules |
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Application publication date: 20120926 |