CN207460540U - A kind of installation detecting module and the circuit of power module and LED straight lamps - Google Patents

A kind of installation detecting module and the circuit of power module and LED straight lamps Download PDF

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Publication number
CN207460540U
CN207460540U CN201720873163.XU CN201720873163U CN207460540U CN 207460540 U CN207460540 U CN 207460540U CN 201720873163 U CN201720873163 U CN 201720873163U CN 207460540 U CN207460540 U CN 207460540U
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China
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circuit
resistance
signal
detection
terminal
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熊爱明
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Jiaxing Super Lighting Electric Appliance Co Ltd
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Jiaxing Super Lighting Electric Appliance Co Ltd
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Priority claimed from CN201621344288.5U external-priority patent/CN206386705U/en
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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Abstract

The utility model discloses a kind of installation detecting modules and the circuit of power module and LED straight lamps, the installation detecting module includes on-off circuit, detection pulse generating module, control circuit, detection decision circuit and detection path circuit, pulse generating module coupling detection path circuit is detected, and pulse signal is generated to notify the opportunity point in detection path circuit conduction detection path when installing detecting module and entering detection-phase；Decision circuit coupling detection path circuit is detected, with the signal when detecting path conducting on detecting detection path circuit；Decision circuit coupling control circuit is detected, testing result is sent to control circuit；Control circuit couples on-off circuit, for controlling on-off circuit according to by testing result；When testing result instruction has user's electric shock risk, on-off circuit ends according to the testing result；And when testing result indicates no user electric shock risk, on-off circuit is turned on according to the testing result.

Description

A kind of installation detecting module and the circuit of power module and LED straight lamps
The application is the Application No. 201621344288.5 submitted on December 7th, 2016, a kind of entitled LED straight The divisional application of the utility application of spot.
Technical field
The utility model is related to field of lighting appliances, and in particular to a kind of circuit for installing detecting module and power module with And LED straight lamps.
Background technology
LED lighting technology it is positive fast-developing and instead of traditional incandescent lamp and fluorescent lamp.Compared to being filled with indifferent gas For the fluorescent lamp of body and mercury, LED straight lamps need not filling mercury.Therefore, various by seeming traditional fluorescent bulbs and lamp In family expenses or the lighting system of workplace that the illumination option such as pipe is dominated, LED straight lamps are it is hardly surprising that be increasingly becoming people Height expect illumination option.The advantages of LED straight lamps the durability comprising promotion and service life and compared with low power consuming.Therefore, After considering all factors, LED straight lamps will be the illumination option of escapable cost.
Known LED straight lamps generally comprise fluorescent tube, in fluorescent tube and the circuit board with light source and arranged on fluorescent tube two The lamp cap at end, lamp cap is interior to be equipped with power supply, is electrically connected between light source and power supply by circuit board.However existing LED is straight Spot still has following a few class quality problems to need to solve, such as circuit board is generally rigid plate, after fluorescent tube ruptures, especially in part When rupture, whole LED straight lamp remains in the state of straight tube, and user, which can be mistakenly considered fluorescent tube, to be used, so as to go It voluntarily installs, is easy to cause generation and leaks electricity and electric shock accidents.Applicant in previous case, such as:In CN105465640U, Propose corresponding structural improvement mode.
And when LED straight lamps are Double-End Source, if one of both-end of LED straight lamps has been inserted into lamp holder and another When lamp holder is not yet inserted at end, if user touches the metal for being not inserted into lamp holder end or conductive part, it is possible to occur to touch The risk of electricity.To solve the problems, such as this, in scheme disclosed in patent CN106015996A, a kind of scheme of LED straight lamps is disclosed, LED drive module in lamp includes a detecting module, is to decide whether that ending external drive signal flows through LED straight lamps, The detecting module has one first sense terminal and one second sense terminal, when flowing through the one of the first sense terminal and the second sense terminal When electric current is greater than or equal to a current value, detecting module conducting makes LED straight lamps operate in a conducting state；It is detectd when flowing through first When surveying an electric current of end and the second sense terminal less than above-mentioned current value, detecting module cut-off makes LED straight lamps not led into one Logical state.For electronic circuit, it is preferably capable of that there is relatively simple control logic and control circuit, therefore above-mentioned side Case still leaves some room for improvement and necessity.
In view of the above problem, the utility model set forth below and embodiment.
The content of the invention
Many embodiments of the summary description herein on " the utility model ".However the vocabulary " the utility model " is only For describing some embodiments disclosed in this description (in spite of in claim) rather than being possible to Embodiment complete description.The some embodiments for being described below as each features or aspect of " the utility model " can not With mode independence or merge to form a LED straight lamps or a portion.
The utility model provides a kind of installation detecting module and the circuit of power module and LED straight lamps, in solution State problem.
The circuit of the installation detecting module of the utility model, is configured in LED straight lamps, for detecting the LED straight lamps Whether occur user's electric shock risk, the installation detecting module include on-off circuit, detection pulse generating module, control circuit, Decision circuit and detection path circuit are detected, wherein：Pulse generating module coupling detection path circuit is detected, and in the peace Dress detecting module generates pulse signal to notify the opportunity point in detection path circuit conduction detection path when entering detection-phase；Inspection Decision circuit coupling detection path circuit is surveyed, with the signal when detecting path conducting on detecting detection path circuit；Detection is sentenced Determine circuit coupling control circuit, testing result is sent to control circuit；Control circuit couples on-off circuit, for according to general Testing result controls on-off circuit；The switching circuit in series is in electric power loop, the LED straight lamps operation to be controlled to lead Logical state or not on-state；When testing result instruction has user's electric shock risk, on-off circuit is cut according to the testing result Only；And when testing result indicates no user electric shock risk, on-off circuit is turned on according to the testing result.
Optionally, the detection pulse generating module includes the first capacitance (2642), the second capacitance (2645) and the 3rd electricity Hold (2646), first resistor (2643), second resistance (2647) and 3rd resistor (2648), the first buffer (2644) and the Two buffers (2651), reverser (2650), the first diode (2649) and the first OR gate (2652), wherein：First capacitance (2642) and first resistor (2643) is series between a driving voltage and reference potential, and tie point couples the first buffer (2644) input terminal；Second resistance (2647) is coupled to the input terminal of a driving voltage and reverser (2650)；3rd resistor (2648) it is coupled between the input terminal and a reference potential of the second buffer (2651)；The anode of first diode (2649) Ground connection, negative terminal are also coupled to the input terminal of the second buffer (2651)；One end of second capacitance (2645) and the 3rd capacitance (2646) One end the first buffer of coupling (2644) jointly output terminal, the other end of the second capacitance (2645) connects reverser (2650) Input terminal, and the other end of the 3rd capacitance (2646) then couples the input terminal of the second buffer (2651)；Reverser (2650) Output terminal and the second buffer (2651) output terminal couple the first OR gate (2652) input terminal.
Optionally, the detection pulse generating module includes：6th resistance (2742), one end connect a driving voltage；The Four capacitances (2743), one end connect the other end of the 6th resistance (2742), and the other end ground connection of the 4th capacitance (2743)；Shi Mi Special trigger (2744), has an input terminal and an output terminal, which connects the 6th resistance (2742) and the 4th capacitance (2743) connecting pin, the output terminal connect the detection path circuit；7th resistance (2745), one end connect the 6th resistance (2742) with the connecting pin of the 4th capacitance (2743)；Second transistor (2746) has a base terminal, a collector terminal and an emitter-base bandgap grading End, the collector terminal connect the other end of the 7th resistance (2745), emitter-base bandgap grading end ground connection；8th resistance (2747), one end connection the The base terminal of two-transistor (2746), and the other end connecting detection path circuit of the 8th resistance (2747) and the control circuit Output terminal；Zener diode (2748), has an anode tap and a cathode terminal, anode tap ground connection, which connects the One end that four capacitances (2743) are connected with the 6th resistance (2742).
Optionally, the on-off circuit is the power switch of DC-DC converter, and the control circuit is pair Answer the controller of the power switch.
Optionally, the detection decision circuit includes comparator, and the end of oppisite phase of the comparator, which receives, refers to level signal, just Input terminal is connected to the detection path circuit, and output terminal is connected to the control circuit.
Optionally, the detection decision circuit includes：9th resistance (2774), one end connect the one of the on-off circuit End, and an installation sense terminal of the other end connection installation detecting module of the 9th resistance (2774)；Second diode (2775), there is an anode tap and a cathode terminal, which is connected to the detection path circuit；Second comparator (2772), there is first input end, the second input terminal and output terminal, which connects a setting signal, this is second defeated Enter the cathode terminal of end the second diode of connection (2775), and the output terminal of the second comparator (2772) is connected to control circuit；The Three comparators (2773), have first input end, the second input terminal and output terminal, which connects the second diode (2775) cathode terminal, second input terminal connect another setting signal, and the output terminal connection of the 3rd comparator (2773) To control circuit；Tenth resistance (2776), one end connection driving voltage；11st resistance (2777), one end connect the tenth resistance (2776) the other end and the second input terminal of the second comparator (2772), and the other end ground connection of the 11st resistance (2777)； 5th capacitance (2778), it is in parallel with the 11st resistance (2777).
Optionally, the on-off circuit includes a transistor, and base terminal is connected with the control circuit, collector terminal with penetrate Extremely the electric power loop, root are connected via the first installation sense terminal and the second installation sense terminal of installation detecting module respectively According to testing result, make on or off between the first installation sense terminal and the second installation sense terminal.
Optionally, the detection path circuit includes transistor and the 12nd resistance (3094) and the 13rd resistance (3093), wherein：The transistor has base stage, collector and emitter-base bandgap grading, and emitter-base bandgap grading connects the detection pulse generating module；12nd Resistance (3094) is concatenated between the emitter-base bandgap grading of the transistor and ground terminal, and the 13rd resistance (3093) is serially connected in the collection of the transistor Between pole and the first installation sense terminal；Wherein described detection path includes the 12nd resistance (3094), the described tenth The concatenation path of three resistance (3093) and the transistor.
Optionally, when the transistor receives detection pulse generating module pulse signal, the crystalline substance during pulse Body pipe turns on, using the signal on detecting detection path circuit as voltage signal.
Optionally, when user is not in contact with fluorescent tube, the level of the voltage signal is according to the 12nd resistance (3094) determined with the partial pressure of the 13rd resistance (3093).
Optionally, when user contacts fluorescent tube, the level of the voltage signal be according to the 12nd resistance (3094) with The equivalent resistance of 13rd resistance (3093) and human body is determined；The equivalent resistance of the human body is serially connected with first installation and detects It surveys between end and ground terminal.
Optionally, detect pulse generating module generate pulse signal pulsewidth in 10us between 1ms.
Optionally, detection pulse generating module is additionally operable to generate the pulse signal of two high levles in detection-phase.
Optionally, the electronic building brick on the detection path is less than the electronic building brick on the electric power loop.
By sampling the voltage signal, (when user is not in contact with fluorescent tube, the level of the voltage signal is according to The partial pressure of 12 resistance and the 13rd resistance and determine, if when user contacts fluorescent tube, the equiva lent impedance of user can be accessed The branch that 12nd resistance is connected with the 13rd resistance, the at this moment voltage of sampled point and simple the 12nd resistance and the 13rd The partial pressure of resistance is different) judge straight lamp either with or without correctly being installed.
The LED straight lamps of the utility model include power module and two lamp caps, have respectively on two lamp cap single pin or Double pins from the pin of both ends lamp cap into the mode of connection of electricity through both-end to receive external drive signal, in the power module With the utility model installation detecting module circuit, and the electric power loop be formed in both ends lamp cap into electric pin it Between.Straight lamp is detected either with or without correct installation by the installation detecting module.
Optionally, the circuit of the installation detecting module is connected with the rectification circuit in the power module.
The circuit of the power module of the utility model, applied in LED straight lamps, the power module includes rectification circuit And filter circuit, there is in the power module circuit of the installation detecting module of the utility model.
Technical solution according to the present utility model in the case where LED straight lamps have one end into electricity, utilizes a control signal The conduction detection electric power loop in a period of the control signal so detects the 2 resistance series connections in path, if user contacts lamp Guan Shi, the equivalent resistance of human body can equivalent series connection enter the circuit, the sampled point so passed through in the detection electric power loop gathers Information of voltage (according to resistance partial pressure), state and accordingly information determine LED straight lamps whether be properly installed on lamp holder and then Decide whether to be powered to LED straight lamps, help avoid causing LED straight lamps charged in the case where mistake is installed so as to bring Electric shock risk.Further effect is hereinafter in conjunction with specific embodiment party possessed by above-mentioned non-usual optional mode Formula is illustrated.
Description of the drawings
Figure 1A is to be illustrated according to the application circuit square of the power supply module of the LED straight lamps of the utility model embodiment Figure；
Figure 1B is to be illustrated according to the application circuit square of the power supply module of the LED straight lamps of the utility model embodiment Figure；
Fig. 1 C are to be illustrated according to the application circuit square of the power supply module of the LED straight lamps of the utility model embodiment Figure；
Fig. 1 D are the circuit box schematic diagram according to a kind of LED light of preferred embodiment of the utility model；
Fig. 1 E are the circuit box schematic diagram according to the LED light of another preferred embodiment of the utility model；
Fig. 2A is the circuit diagram according to the rectification circuit of the utility model embodiment；
Fig. 2 B are the circuit diagram according to the rectification circuit of the utility model embodiment；
Fig. 2 C are the circuit diagram according to the rectification circuit of the utility model embodiment；
Fig. 2 D are the circuit diagram according to the rectification circuit of the utility model embodiment；
Fig. 2 E are the circuit diagram according to the rectification circuit of the utility model embodiment；
Fig. 2 F are the circuit diagram according to the rectification circuit of the utility model embodiment；
Fig. 3 A are to be illustrated according to the application circuit square of the power supply module of the LED straight lamps of the utility model embodiment Figure；
Fig. 3 B are the circuit diagram according to the detection pulse generating module of the utility model embodiment；
Fig. 3 C are the circuit diagram according to the detection decision circuit of the utility model embodiment；
Fig. 3 D are the circuit diagram according to the on-off circuit of the utility model embodiment；
Fig. 3 E are the circuit diagram according to the on-off circuit of the utility model embodiment；
Fig. 3 F are the circuit diagram according to the installation detecting module of the utility model embodiment；
Fig. 3 G are the circuit diagram according to the detecting path circuit of the utility model embodiment；
Fig. 3 H are another detection pulse generating module schematic diagram according to the utility model embodiment；
Fig. 3 I are another detection decision circuit schematic diagram according to the utility model embodiment.
Specific embodiment
The utility model is on the basis of glass lamp, it is proposed that a kind of new LED straight lamps, to solve in background technology The problem of mentioning and the above problem.It is understandable for the above-mentioned purpose of the utility model, feature and advantage is enable to become apparent, under Face is described in detail specific embodiment of the utility model with reference to attached drawing.The narration of following various embodiments of the utility model is only Be in order to illustrate and be illustration, be not meant as the whole embodiments of the utility model or the utility model be limited to specific reality Apply example.
In addition need first to illustrate, herein in order to clearly state each utility model feature of this exposure and with multiple implementations The mode point of example is described as follows with regard to each embodiment.But do not mean that each embodiment is only capable of individually implementing.It is familiar with the skill of this field Art personnel can according to demand from be about to feasible implementation example collocation design together or by different embodiments can band change According to design requirement, voluntarily band changes components/modules.In other words, the embodiment that this case is taught is not limited only to described in the following example Aspect, also include in the case of feasible, the band between each embodiment/components/modules changes and permutation and combination, in this conjunction It first chats bright.
Though applicant in previous case, such as:In CN105465640A, it is proposed that reached using flexible circuit board Into the improvement mode for reducing electric leakage accident, section Example can be combined with present application using circuit mode will have more significantly Effect.
Figure 1A is referred to, is the application circuit side according to the power supply module of the LED straight lamps of the utility model embodiment Block schematic diagram.508 system of AC power is providing ac supply signal.AC power 508 can be alternating current, voltage range 100- 277V, frequency are 50 or 60Hz.Lamp tube drive circuit 505 receives the ac supply signal of AC power 508, and is converted into exchanging Drive signal is using as external drive signal.Lamp tube drive circuit 505 can be electric ballast, the signal of alternating current to be turned It changes into high frequency, the alternating current drive signal of high pressure.The species of common electronics ballast, such as：Instantaneous starting type (Instant Start) electric ballast, preheating start-up type (Program Start) electric ballast, quick-starting direct (Rapid Start) Electric ballast etc., the LED straight lamps of the utility model are applicable in.The voltage of alternating current drive signal is more than 300V, preferable voltage Scope is 400-700V；Frequency is more than 10kHz, and preferable frequency range is 20k-50kHz.LED straight lamps 500 receive external drive Dynamic signal, in the present embodiment, external drive signal are the alternating current drive signal of lamp tube drive circuit 505, and are driven to emit light. In the present embodiment, LED straight lamps 500 are the driving framework of single ended power supply, and the same end lamp cap of fluorescent tube has the first pin 501st, the second pin 502, to receive external drive signal.First pin 501, the second pin 502 of the present embodiment couple (that is, electrical connection, directly or indirectly connect) is to lamp tube drive circuit 505 to receive alternating current drive signal.
It is worth noting that, lamp tube drive circuit 505 is omissible circuit, therefore indicated in the drawings with dotted line.When When lamp tube drive circuit 505 omits, AC power 508 is coupled with the first pin 501, the second pin 502.At this point, the first pin 501st, the second pin 502 receives the ac supply signal that is provided of AC power 508, using as external drive signal.
In addition to the application of above-mentioned single ended power supply, the LED straight lamps 500 of the utility model can also be applied to both-end list The circuit structure of the double pins of the circuit structure and both-end of pin.Wherein, the circuit structure of both-end list pin refers to Figure 1B, figure 1B is the application circuit block schematic diagram according to the power supply module of the LED straight lamps of the utility model embodiment.Compared to figure Shown in 1A, first pin 501, the second pin 502 of the present embodiment are respectively placed in the opposite both-end of fluorescent tube of LED straight lamps 500 For lamp cap to form each single pin of both-end, the connection of remaining circuit and function are then identical with circuit shown in Figure 1A.The double pins of both-end Circuit structure refers to Fig. 1 C, and Fig. 1 C are the application electricity according to the power module of the LED straight lamps of the utility model embodiment Road block schematic diagram.Compared to shown in Figure 1A, the present embodiment further includes the 3rd pin 503 and the 4th pin 504.The one of fluorescent tube Hold lamp cap that there is the first pin 501, the second pin 502, other end lamp cap has the 3rd pin 503, the 4th pin 504.First Pin 501, the second pin 502, the 3rd pin 503 and the 4th pin 504 are coupled to lamp tube drive circuit 505 and are handed over common reception Drive signal is flowed, the LED component (not shown) in LED straight lamps 500 to be driven to shine.
Under the circuit structure of the double pins of both-end, both-end list pin into electrically or the double pins of both-end into electricity side Formula can penetrate the configuration of adjustment power module to realize the power supply of fluorescent tube.Wherein, in both-end list pin under electrically (that is, both ends lamp cap is respectively to the external drive signal of opposed polarity), in an exemplary embodiment, both-end lamp cap can have respectively One pin connects/suspension joint for sky, for example, the second pin 502 and the 3rd pin 503 can be it is empty connect the/state of suspension joint, make fluorescent tube saturating It crosses the first pin 501 and the 4th pin 504 receives external drive signal, use and make the power module progress inside fluorescent tube subsequent Rectification and filter action；In another exemplary embodiment, the pin of both-end lamp cap can distinguish short circuit together, such as first connects Foot 501 is together with the short circuit of the second pin 502 on the lamp cap of the same side, and the 3rd pin 503 and the on the lamp cap of the same side Four pins, 504 short circuit together, so can receive positive polarity or cathode also with the first pin 501 and the second pin 502 Property external drive signal, and using the external drive signal of the 3rd pin 503 and the 4th pin 504 reception opposite polarity, It uses and the power module inside fluorescent tube is made to carry out subsequent rectification and filter action.The double pins of both-end under electrically (i.e., Two pins of the same side lamp cap give the external drive signal of opposed polarity respectively), in an exemplary embodiment, the first pin 501 and second pin 502 can receive the external drive signal of opposite polarity, and the 3rd pin 503 can connect with the 4th pin 504 The external drive signal of opposite polarity is received, uses and the power module inside fluorescent tube is made to carry out subsequent rectification and filter action.
Fig. 2A is referred to, is the circuit diagram according to the rectification circuit of the utility model embodiment.Rectification circuit 610 For bridge rectifier, the first rectifier diode 611, the second rectifier diode 612, the 3rd rectifier diode 613 and are included Four rectifier diodes 614, to carry out full-wave rectification to received signal.The anode coupling the of first rectifier diode 611 Two rectification output ends 512, cathode couple the second pin 502.The anode of second rectifier diode 612 couples the second rectification output end 512, cathode couples the first pin 501.The anode of 3rd rectifier diode 613 couples the second pin 502, and cathode coupling first is whole Flow output terminal 511.The anode of rectifier diode 614 couples the first pin 501, and cathode couples the first rectification output end 511.
When the first pin 501,502 received signal of the second pin are AC signal, the operation description of rectification circuit 610 It is as follows.When AC signal is in positive half-wave, AC signal is sequentially through the first pin 501,614 and first rectification of rectifier diode It flows into after output terminal 511, and is sequentially flowed after the second rectification output end 512, the first rectifier diode 611 and the second pin 502 Go out.When AC signal is in negative half-wave, AC signal is sequentially whole through the second pin 502, the 3rd rectifier diode 613 and first It flows into after stream output terminal 511, and is sequentially flowed out after the second rectification output end 512, the second rectifier diode 612 and pin 501. Therefore, no matter AC signal is in positive half-wave or negative half-wave, it is whole that the anode of the rectified signal of rectification circuit 610 is respectively positioned on first Output terminal 511 is flowed, cathode is respectively positioned on the second rectification output end 512.Illustrate according to aforesaid operations, rectification circuit 610 exports whole Signal is full wave rectified signal after stream.
When the first pin 501, the second pin 502 coupling DC power supply and when receiving direct current signal, the behaviour of rectification circuit 610 It is described as follows.When the first pin 501 couples the anode of DC power supply and the second pin 502 couples the negative terminal of DC power supply, Direct current signal sequentially flows into after the first pin 501,614 and first rectification output end 511 of rectifier diode, and sequentially through second It is flowed out after rectification output end 512, the first rectifier diode 611 and the second pin 502.When the first pin 501 couples DC power supply Negative terminal and the second pin 502 coupling DC power supply anode when, AC signal is sequentially through the second pin 502, the 3rd rectification two It is flowed into after 613 and first rectification output end 511 of pole pipe, and sequentially through the second rectification output end 512, the second rectifier diode 612 It is flowed out with after the first pin 501.Similarly, it is whole no matter how direct current signal inputs through the first pin 501, the second pin 502 The anode of the rectified signal of current circuit 610 is respectively positioned on the first rectification output end 511, and cathode is respectively positioned on the second rectification output end 512。
Therefore, though the present embodiment 610 received signal of rectification circuit for AC signal or direct current signal, Correct output rectified signal.
Fig. 2 B are referred to, are the circuit diagram according to the rectification circuit of the utility model embodiment.Rectification circuit 710 Comprising the first rectifier diode 711 and the second rectifier diode 712, to carry out halfwave rectifier to received signal.First The anode of rectifier diode 711 couples the second pin 502, and cathode couples the first rectification output end 511.Second rectifier diode 712 anode couples the first rectification output end 511, and cathode couples the first pin 501.Second rectification output end 512 regards actual answer With and can be omitted or be grounded.
Then illustrate that the operation of rectification circuit 710 is as follows.
When AC signal is in positive half-wave, AC signal is higher than in the signal level that the first pin 501 inputs second The signal level that pin 502 inputs.At this point, the first rectifier diode 711 and the second rectifier diode 712 be in it is inverse inclined Cut-off state, rectification circuit 710 stop output rectified signal.When AC signal is in negative half-wave, AC signal is first The signal level that pin 501 inputs is less than the signal level in the input of the second pin 502.At this point, the first rectifier diode 711 And second rectifier diode 712 be in along inclined conducting state, AC signal is whole via the first rectifier diode 711, first It flows output terminal 511 and flows into, and flowed out by the second rectification output end 512 or another circuit or ground terminal of LED light.According to above-mentioned Operating instruction, the rectified signal that rectification circuit 710 exports are half wave rectified signal.
Wherein, the first pin 501 of the rectification circuit shown in Fig. 2A and Fig. 2 B and the second pin 502 are changed to the 3rd and connect When foot 503 and four pins 504, you can as the second rectification circuit 540 shown in Fig. 1 E.It is more specifically, real in an example It applies in example, the full-wave rectifying circuit 610 shown in Fig. 2A is applied in the fluorescent tube of the double-width grinding of Fig. 1 E, the first rectification circuit 510 and second the configuration of rectification circuit 540 can be as shown in Figure 2 C.Fig. 2 C are referred to, Fig. 2 C are according to the utility model embodiment party The circuit diagram of the rectification circuit of formula.
The framework of rectification circuit 640 is identical with the framework of rectification circuit 610, is all bridge rectifier.Rectification circuit 610 Including first to fourth rectifier diode 611-614, configure as described in earlier figures 2A embodiments.Rectification circuit 640 includes the Five rectifier diodes 641, the 6th rectifier diode 642, the 7th rectifier diode 643 and the 8th rectifier diode 644, to right Received signal carries out full-wave rectification.The anode of 5th rectifier diode 641 couples the second rectification output end 512, cathode coupling Connect the 4th pin 504.The anode of 6th rectifier diode 642 couples the second rectification output end 512, and cathode couples the 3rd pin 503.The anode of 3rd rectifier diode 613 couples the second pin 502, and cathode couples the first rectification output end 511.Two pole of rectification The anode of pipe 614 couples the 3rd pin 503, and cathode couples the first rectification output end 511.
In the present embodiment, rectification circuit 640 is corresponding configuration with 610, and the two difference is only that rectification circuit 610 The input terminal of (can compare the first rectification circuit 510 for Fig. 1 E herein) is coupled to the first pin 501 and the second pin 502, and The input terminal of rectification circuit 640 (can compare the second rectification circuit 540 for Fig. 1 E herein) is coupled to the 3rd pin 503 and Four pins 504.In other words, the present embodiment is the circuit knot that the double pins of both-end are realized using the framework of two full-wave rectifying circuits Structure.
Further, in the rectification circuit of Fig. 2 C embodiments, although being realized with the configurations of the double pins of both-end, It is either single-ended into electricity or both-end list pin into electrically can but in addition to the double pins of both-end are into the power supply mode of electricity LED straight lamps are powered through the circuit structure of the present embodiment.Specific running is described as follows：
It is single-ended into electricity in the case of, external drive signal can be applied in the first pin 501 and the second pin 502 or It is applied in the 3rd pin 503 and the 4th pin 504.The first pin 501 and the second pin are applied in external drive signal When on 502, rectification circuit 610 can carry out full-wave rectification according to the function mode described in Fig. 2A embodiments to external drive signal, And rectification circuit 640 will not then operate.On the contrary, it is applied to the 3rd pin 503 and the 4th pin 504 in external drive signal When upper, rectification circuit 640 can carry out full-wave rectification according to the function mode described in Fig. 2A embodiments to external drive signal, and whole Current circuit 610 will not then operate.
In the case where both-end list pin is into electricity, external drive signal can be applied to the first pin 501 and the 4th pin 504 or it is applied to the second pin 502 and the 3rd pin 503.The first pin 501 and the 4th is applied in external drive signal Pin 504, and external drive signal be AC signal when, during AC signal is in positive half-wave, AC signal sequentially passes through It is flowed into after first pin 501, the 4th rectifier diode 614 and the first rectification output end 511, and sequentially through the second rectification output end 512nd, flowed out after the 5th rectifier diode 641 and the 4th pin 504.During AC signal is in negative half-wave, AC signal Sequentially flowed into after the 4th pin 504, the 7th rectifier diode 643 and the first rectification output end 511, and it is sequentially whole through second It is flowed out after stream output terminal 512, the second rectifier diode 612 and the first pin 501.Therefore, no matter AC signal is in positive half-wave Or negative half-wave, the anode of rectified signal are respectively positioned on the first rectification output end 511, cathode is respectively positioned on the second rectification output end 512. Illustrate according to aforesaid operations, the second rectifier diode 612 and the collocation rectification of the 4th rectifier diode 614 in rectification circuit 610 The 5th rectifier diode 641 and the 7th rectifier diode 643 in circuit 640 carry out full-wave rectification to AC signal, and defeated The rectified signal gone out is full wave rectified signal.
On the other hand, the second pin 502 and the 3rd pin 503, and external drive signal are applied in external drive signal For AC signal when, during AC signal is in positive half-wave, AC signal is sequentially through the 3rd pin 503, the 8th rectification two It is flowed into after 644 and first rectification output end 511 of pole pipe, and sequentially through the second rectification output end 512, the first rectifier diode 611 It is flowed out with after the second pin 502.During AC signal is in negative half-wave, AC signal is sequentially through the second pin the 502, the 3rd It is flowed into after 613 and first rectification output end 511 of rectifier diode, and sequentially through the second rectification output end 512, two pole of the 6th rectification It is flowed out after 642 and the 3rd pin 503 of pipe.Therefore, no matter AC signal is in positive half-wave or negative half-wave, the anode of rectified signal The first rectification output end 511 is respectively positioned on, cathode is respectively positioned on the second rectification output end 512.Illustrate according to aforesaid operations, rectification circuit The 6th rectifier diode in the first rectifier diode 611 and the 3rd rectifier diode 613 collocation rectification circuit 640 in 610 642 and the 8th rectifier diode 644 to AC signal carry out full-wave rectification, and export rectified signal for full-wave rectification letter Number.
In the case where the double pins of both-end are into electricity, rectification circuit 610 and 640 other runnings can refer to above-mentioned Fig. 2A and implement The explanation of example, repeats no more in this.Wherein, signal can be defeated in the first rectification after rectification caused by rectification circuit 610 and 640 Outlet 511 is exported after being superimposed with the second rectification output end 512 to the circuit of rear end.
In an exemplary embodiment, the configuration of rectification circuit 510 ' can be as shown in Figure 2 D.Fig. 2 D are referred to, according to Fig. 2 D The circuit diagram of the rectification circuit of the utility model embodiment.Rectification circuit 910 includes first to fourth rectifier diode 911-914 is configured as described in earlier figures 2A embodiments.In the present embodiment, rectification circuit 910 further includes the 5th rectification two 915 and the 6th rectifier diode 916 of pole pipe.The anode of 5th rectifier diode 915 couples the second rectification output end 512, cathode Couple the 3rd pin 503.The anode of 6th rectifier diode 916 couples the 3rd pin 503, and cathode couples the first rectification output end 511.4th pin 504 is floating in this.
More specifically, the rectification circuit 510 ' of the present embodiment, which can be considered, the whole of three groups of bridge arms (bridge arm) unit Current circuit, every group of bridge arm unit can provide an input signal receiving terminal.For example, the first rectifier diode 911 and the 3rd Rectifier diode 913 forms the first bridge arm unit, corresponds to the signal received in the second pin 502；Second rectifier diode 912 The second bridge arm unit is formed with the 4th rectifier diode 914, corresponds to the signal received in the first pin 501；And the 5th is whole It flows 915 and the 6th rectifier diode 916 of diode and forms the 3rd bridge arm unit, correspond to the signal received in the 3rd pin 503. Wherein, as long as three groups of bridge arm unit two of which, which receive opposite polarity AC signal, can be carried out full-wave rectification.Base this, It is similary compatible single-ended to be connect into electricity, both-end list pin into electricity and both-end are double under the configuration of the rectification circuit of Fig. 2 E embodiments Foot into electricity power supply mode.Specific running is described as follows：
It is single-ended into electricity in the case of, external drive signal is applied in the first pin 501 and the second pin 502, at this time The running of first to fourth rectifier diode 911-914 as described in earlier figures 2A embodiments, and the 5th rectifier diode 915 with 6th rectifier diode 916 is inoperative.
In the case where both-end list pin is into electricity, external drive signal can be applied to the first pin 501 and the 3rd pin 503 or it is applied to the second pin 502 and the 3rd pin 503.The first pin 501 and the 3rd is applied in external drive signal Pin 503, and external drive signal be AC signal when, during AC signal is in positive half-wave, AC signal sequentially passes through It is flowed into after first pin 501, the 4th rectifier diode 914 and the first rectification output end 511, and sequentially through the second rectification output end 512nd, flowed out after the 5th rectifier diode 915 and the 3rd pin 503.During AC signal is in negative half-wave, AC signal Sequentially flowed into after the 3rd pin 503, the 6th rectifier diode 916 and the first rectification output end 511, and it is sequentially whole through second It is flowed out after stream output terminal 512, the second rectifier diode 912 and the first pin 501.Therefore, no matter AC signal is in positive half-wave Or negative half-wave, the anode of rectified signal are respectively positioned on the first rectification output end 511, cathode is respectively positioned on the second rectification output end 512. Illustrate according to aforesaid operations, the second rectifier diode 912, the 4th rectifier diode 914 in rectification circuit 910, the 5th rectification 915 and the 6th rectifier diode 916 of diode carries out AC signal full-wave rectification, and the rectified signal exported is all-wave Rectified signal.
On the other hand, the second pin 502 and the 3rd pin 503, and external drive signal are applied in external drive signal For AC signal when, during AC signal is in positive half-wave, AC signal is sequentially through the 3rd pin 503, the 6th rectification two It is flowed into after 916 and first rectification output end 511 of pole pipe, and sequentially through the second rectification output end 512, the first rectifier diode 911 It is flowed out with after the second pin 502.During AC signal is in negative half-wave, AC signal is sequentially through the second pin the 502, the 3rd It is flowed into after 913 and first rectification output end 511 of rectifier diode, and sequentially through the second rectification output end 512, two pole of the 5th rectification It is flowed out after 915 and the 3rd pin 503 of pipe.Therefore, no matter AC signal is in positive half-wave or negative half-wave, the anode of rectified signal The first rectification output end 511 is respectively positioned on, cathode is respectively positioned on the second rectification output end 512.Illustrate according to aforesaid operations, rectification circuit The first rectifier diode 911, the 3rd rectifier diode 913, the 5th rectifier diode 915 and the 6th rectifier diode in 910 916 pairs of AC signals carry out full-wave rectification, and the rectified signal exported is full wave rectified signal.
In the case where the double pins of both-end are into electricity, the running of first to fourth rectifier diode 911~914 can refer to above-mentioned The explanation of Fig. 2A embodiments, repeats no more in this.If in addition, the signal polarity of the 3rd pin 503 is identical with the first pin 501, Then the running of the 5th rectifier diode 915 and the 6th rectifier diode 916 is similar to the second rectifier diode 912 and the 4th rectification Diode 914 (that is, the first bridge arm unit).On the other hand, if the signal polarity of the 3rd pin 503 is identical with the second pin 502, Then the running of the 5th rectifier diode 915 and the 6th rectifier diode 916 is similar to the first rectifier diode 911 and the 3rd rectification Diode 913 (that is, the second bridge arm unit).
Fig. 2 E are referred to, Fig. 2 E are the circuit diagram according to the rectification circuit of the utility model embodiment.Fig. 2 E with Fig. 2 D are roughly the same, and the two difference is that the input terminal of the first rectification circuit 610 of Fig. 2 E more couples endpoint conversion circuit 941. Wherein, the endpoint conversion circuit 941 of the present embodiment includes fuse 947 and 948.947 one end of fuse couples the first pin 501, the other end is coupled to conode (that is, the first bridge arm unit of the second rectifier diode 912 and the 4th rectifier diode 914 Input terminal).948 one end of fuse couples the second pin 502, and the other end is coupled to the first rectifier diode 911 and the 3rd whole Flow the conode (that is, the input terminal of the second bridge arm unit) of diode 913.Thereby, when the first pin 501 and the second pin 502 When any electric current flowed through is higher than the rated current of fuse 947 and 948, fuse 947 and 948 will accordingly fuse and open Road thereby reaches the function of overcurrent protection.In addition, in the case of fuse 947 and 948 only one of them fusing (such as overcurrent situation only occur that of short duration time eliminates), if driving lamp into the power supply mode of electricity using the double pins of both-end Pipe, then the rectification circuit of the present embodiment can also be after the elimination of overcurrent situation, the powering mode based on both-end list pin and lasting fortune Make.
Fig. 2 F are referred to, Fig. 2 F are the circuit diagram according to the rectification circuit of the utility model embodiment.Fig. 2 F with Fig. 2 D are roughly the same, and the two difference is that two pins 503 and 504 of Fig. 2 F are connected to one by thin (e.g., copper) conducting wire 917 It rises.For earlier figures 2D embodiments, when using both-end list pin into electricity, no matter external drive signal is consequently exerted at 3rd pin 503 or the 4th pin 504, the rectification circuit of the present embodiment all can normal operation.In addition, when the 3rd pin 503 with During the single-ended lamp holder into electricity of the mistake access of the 4th pin 504, thin (copper) conducting wire 917 of the present embodiment can reliably fuse, because This when fluorescent tube turns back to correct lamp holder remains to that normal rectification is maintained to work using the straight lamp of this rectification circuit.
It can be seen from the above, the rectification circuit of Fig. 2 C to Fig. 2 F embodiments can be compatible with it is single-ended into electricity, both-end list pin into electricity And the double pins of both-end are into the situation of electricity, and then improve the application environment compatibility of integral LED straight lamp.In addition, consider From the point of view of being laid out situation to actual circuit, the circuit configuration of the embodiment of Fig. 2 D inside fluorescent tube only needs that three pads is set to connect Corresponding lamp cap pin is connected to, has significant contribution for the promotion of overall process yield.
Fig. 3 A are referred to, are the application circuit side according to the power supply module of the LED straight lamps of the utility model embodiment Block schematic diagram.The LED straight lamps of the present embodiment include the first rectification circuit 510, filter circuit 520 and also increase installation detecting mould Block 2520, wherein power module can also include the members of LED illumination module 530.Detecting module 2520 is installed through first Sense terminal 2521 is installed to couple the first rectification circuit 510 and couple filter circuit 520 through the second installation sense terminal 2522.Peace Dress detecting module 2520 detects the signal for flowing through the first installation sense terminal 2521 and the second installation sense terminal 2522, and according to detecting As a result decide whether that ending external drive signal flows through LED straight lamps.When LED straight lamps are not yet formally installed on lamp holder, peace Dress detecting module 2520 can detect smaller current signal and judge that signal flows through excessively high impedance, installs detecting module at this time 2520 cut-offs stop operation LED straight lamps.If it is not, installation detecting module 2520 judges that LED straight lamps are correctly installed on lamp holder On, installation detecting module 2520 maintains conducting to make LED straight lamp normal operatings.That is, when flow through it is described first installation sense terminal with And it is described second installation sense terminal an electric current be greater than or equal to set-mounted electric current (or a current value) when, installation detecting mould Block judges that LED straight lamps are correctly installed on lamp holder and turn on, and LED straight lamps is made to operate in a conducting state；It is described when flowing through When one electric current of the first installation sense terminal and the second installation sense terminal is less than described set-mounted electric current (or current value), Installation detecting module judges that LED straight lamps are not installed on lamp holder correctly and end, and LED straight lamps is made to be not turned on shape into one State.In other words, installation impedance of the detecting module 2520 based on detecting judges on or off, operates in LED straight lamps and leads It is logical or into not on-state.Thereby, can to avoid user when LED straight lamps are not yet correctly installed on lamp holder because of false touch LED straight lamps current-carrying part and the problem of get an electric shock.
In another exemplary embodiment, because when human contact's fluorescent tube, the impedance of human body can cause on electric power loop Equiva lent impedance changes, and installation detecting module 2520 can judge whether user contacts by the voltage change on detecting electric power loop Fluorescent tube can equally realize above-mentioned electroshock-proof function.In other words, in the utility model embodiment, detecting module is installed 2520 can penetrate detecting electric signal (including voltage or electric current) to judge whether fluorescent tube is properly installed and whether is user The current-carrying part of false touch fluorescent tube in the case where fluorescent tube is not installed correctly.
Fig. 3 B are referred to, are the circuit diagram according to the detection pulse generating module of the utility model embodiment.Inspection Survey pulse generating module 2640 include capacitance 2642 (or first capacitor), 2645 (or second capacitors) and 2646 (or Claim the 3rd capacitor), resistance 2643 (or first resistor device), 2647 (or second resistance devices) and 2648 (or the 3rd electricity Hinder device), buffer (buffer) 2644 (or first buffer) and 2651 (or second buffers), reverser 2650, two Pole pipe 2649 (or being the first diode) and OR gate (OR gate) 2652 (or being the first OR gate).It is using or is operating In, capacitance 2642 and resistance 2643 are series at a driving voltage (such as referred to as VCC, and often being ordered as a high levle) and reference Between current potential (herein using the current potential on ground as embodiment), tie point couples the input terminal of buffer 2644.2647 coupling of resistance It is connected to the input terminal of a driving voltage (can be described as VCC) and reverser 2650.Resistance 2648 is coupled to the input of buffer 2651 Between end and a reference potential (herein using the current potential on ground as embodiment).The positive ending grounding of diode, negative terminal are also coupled to buffer The input terminal of device 2651.One end of capacitance 2645 and 2646 one end couple the output terminal of buffer 2644, capacitance 2645 jointly The other end connect the input terminal of reverser 2650, and the other end of capacitance 2646 then couples the input terminal of buffer 2651.Instead The input terminal of the output terminal coupling OR gate 2652 of output terminal and buffer 2651 to device 2650.It is noted that this case this In specification, current potential its " high levle " is relative to " low level " for another current potential in circuit or certain reference potential (can be described as " high level " and " low level " sometimes), and again can be respectively as " logic high levle " and " logic low level ".
When LED straight lamps one end lamp cap insertion lamp holder and other end lamp cap human body in electrical contact or LED straight lamps it is double When end lamp cap is inserted into lamp holder, LED straight lamps are powered.At this point, installation detecting module enters detection-phase.Capacitance 2642 and resistance 2643 tie point level is at the beginning high (being equal to driving voltage VCC), is gradually reduced at any time after, is finally down to zero.It is slow The input terminal coupling capacitance 2642 of device 2644 and the tie point of resistance 2643 are rushed, therefore exports high levle signal at the beginning, and When the tie point level of capacitance 2642 and resistance 2643 is down to low logic and judges level, low level signal is changed into.It is it is, slow It rushes device 2644 and generates an input pulse signal, persistently maintain low level (stopping exporting the input pulse signal) afterwards.It is described The pulse width of input pulse signal is equal to (initial setting) time cycle, and the time cycle is by the appearance of capacitance 2642 Value and the resistance value of resistance 2643 determine.
Then illustrate that buffer 2644 generates the operation in the setting time cycle of pulse signal.Due to capacitance 2645 and resistance 2647 one end is equal to driving voltage VCC, therefore the connecting pin of capacitance 2645 and resistance 2647 is also high levle.It is in addition, electric One end ground connection of resistance 2648, one end of capacitance 2646 receive the pulse signal of buffer 2644.So capacitance 2646 and resistance 2648 connecting pin in high levle at the beginning, then at any time gradually on be down to zero and (store and be equal or close to time capacitance The voltage of driving voltage VCC).Therefore, reverser 2650 exports low level signal, and buffer 2651 then exports high levle letter Number, and OR gate 2652 is made to export high levle signal (the first pulse signal) in pulse signal output end 2541.At this point, testing result Signal and pulse signal latch testing result to latch cicuit 2560 for the first time according to testing result.When capacitance 2646 and resistance When the level of 2648 connecting pin is down to low logic and judges level, buffer 2651 switchs to export low level signal, and makes OR gate 2652 export low level signal (stopping the first pulse signal of output) in pulse signal output end 2541.What OR gate 2652 was exported The pulsewidth of pulse signal is determined by the capacitance of capacitance 2646 and the resistance value of resistance 2648.
Then the operation being illustrated in after the stopping output pulse signal of buffer 2644, the i.e. operation into the operational phase. Since capacitance 2646 stores the voltage close to driving voltage VCC, switched in the output of buffer 2644 by high levle low The moment of level, capacitance 2646 and the level of the connecting pin of resistance 2648 can be less than zero, and fast to capacitance via diode 2649 Speed charges and the level of connecting pin is made to retract zero.Therefore, buffer 2651 still maintains output low level signal.
On the other hand, moment of low level is switched to by high levle in the output of buffer 2644, one end of capacitance 2645 Level reduces by zero by driving voltage VCC moments, and the connecting pin for making capacitance 2645 and resistance 2647 is low level.Reverser 2650 Output signal switchs to high levle, and OR gate is made to export high levle (the second pulse signal).At this point, testing result latch cicuit 2560 Signal and pulse signal latch testing result for the second time according to testing result.Then, resistance 2647 charges to capacitance 2645, makes electricity The level for holding the connecting pin of 2645 and resistance 2647 is gradually increasing and arrives equal to driving voltage VCC at any time.When appearance 2645 and electricity When the level of the connecting pin of resistance 2647 rises supreme logic judgment level, reverser 2650 exports low level once again, and makes OR gate 2652 stop the second pulse signal of output.The pulsewidth of second pulse signal is by the capacitance of capacitance 2645 and the resistance value of resistance 2647 It is determined.
As described above, detection pulse generating module 2640 can generate the pulse signal-the of two high levles in detection-phase One pulse signal and the second pulse signal, are exported by pulse signal output end 2541, and the first pulse signal and the second pulse A setting time interval is spaced between signal, setting time interval is mainly by the capacitance of capacitance 2642 and the resistance value of resistance 2643 To determine.
And pulse signal is no longer generated into operational phase, detection pulse generating module 2640 after detection-phase, and tie up Pulse signal output end 2541 is held as low level.
Fig. 3 C are referred to, are the circuit diagram according to the detection decision circuit of the utility model embodiment.Detection is sentenced Determine circuit 2670 and include comparator 2671 (or first comparator) and resistance 2672 (or the 5th resistor).Comparator 2671 end of oppisite phase is received with reference to level signal Vref, and non-oppisite phase end is through the ground connection of resistance 2672 and couples switch coupling end simultaneously 2581.Please referring also to Fig. 3 A, the signal that on-off circuit 2580 is flowed by the first installation sense terminal 2521 can be coupled via switch End 2581 exports and flows through resistance 2672.When the electric current for flowing through resistance 2672 it is excessive (that is, greater than or equal to set-mounted electric current, Such as：Current value 2A) and the level on resistance 2672 is made (to may correspond to described two when being higher than the level for referring to level signal Vref Lamp cap is correctly inserted into the lamp holder), the testing result signal of the generation high levle of comparator 2671 is simultaneously defeated by testing result end 2571 Go out.For example, when LED straight lamps are correctly installed on lamp holder, comparator 2671 can export high levle in testing result end 2571 Testing result signal.When the electric current deficiency for flowing through resistance 2672 makes the level on resistance 2672 be higher than with reference to level signal Vref Level when (may correspond to only one of which lamp cap and be correctly inserted into the lamp holder), comparator 2671 generate low level detection Consequential signal is simultaneously exported by testing result end 2571.For example, when LED straight lamps are not correctly installed on lamp holder or the peace of one end When loaded on lamp holder, the other end is through human body grounding, electric current makes comparator 2671 export low standard in testing result end 2571 by too small The testing result signal of position.
Fig. 3 D are referred to, are the circuit diagram according to the on-off circuit of the utility model embodiment.On-off circuit 2680 can include a transistor (transistor), such as bipolar junction transistors 2681 (or the first transistor) conduct One power transistor (power transistor).Power transistor can handle high current and power, be particularly used to switch electricity Lu Zhong.Collector coupling the first installation sense terminal 2521 of bipolar junction transistors 2681, base stage coupling testing result latch end 2561, and emitter-base bandgap grading switch coupling end 2581.When detection pulse generating module 2640 generates the first pulse signal or the second pulse letter Number when, of short duration conducting is detected detection decision circuit 2670, to determine testing result by bipolar junction transistors 2681 Latch signal is high levle or low level.High levle is exported when testing result latch cicuit 2660 latches end 2561 in testing result Testing result latch signal when, conducting is made the first installation sense terminal 2521 and second by bipolar junction transistors 2681 It is turned between installation sense terminal 2522.Low level is exported when testing result latch cicuit 2660 latches end 2561 in testing result Testing result latch signal when, cut-off is made the first installation sense terminal 2521 and second by bipolar junction transistors 2681 End between installation sense terminal 2522.
Since external drive signal is AC signal, when being detected in order to avoid detection decision circuit 2670, external drive letter Number level just zero crossings cause detecting mistake.Therefore, detect pulse generating module 2640 and generate the first pulse letter Number and the second pulse signal so that detection decision circuit 2670 detect twice, the standard of external drive signal when being detected to avoid single Position is just the zero crossings the problem of.Preferably, the generation time of the first pulse signal and the second pulse signal difference is not institute And the 180 degree phase difference of external drive signal described in non-corresponding the integer multiple of the cycle half of external drive signal is stated, i.e., Integer multiple.In this way, during the generation of one of the first pulse signal and the second pulse signal, if unfortunate external drive signal is zero Near point, when another generation, can avoid external drive signal also in zero crossings.
The generation time of above-mentioned first pulse signal and the second pulse signal is poor, i.e., setting time interval can be with formula table Show as follows：
Setting time interval=(X+Y) (T/2)
Wherein, T is the cycle of external drive signal, and X is integer more than or equal to zero, 0<Y<1.
The preferable scopes of Y are between 0.05-0.95, between more preferably 0.15-0.85.
Furthermore when entering detection-phase in order to avoid installation detecting module, the level of driving voltage VCC is too low to be caused to pacify The circuit logic misjudgment of dress detecting module is begun to ramp up.Driving voltage is may be set in the generation of the first pulse signal VCC is reached or higher than predetermined level when generates, and driving voltage VCC is made to detect decision circuit 2670 just after reaching enough levels It carries out, to avoid the circuit logic misjudgment of installation detecting module caused by level deficiency.
According to the above description, when LED straight lamps one end lamp cap insertion lamp holder and other end lamp cap is suspension joint or electricity Property contact human body when, the testing result signal of detection decision circuit output low level is made due to impedance is big.Testing result latches electricity The detection of low level is latched into the testing result signal of low level according to the pulse signal of detection pulse generating module in road As a result latch signal, and also maintain testing result when the operational phase.In this way, on-off circuit can be made to maintain cut-off and avoid continuing It is powered.It so can also avoid human electric shock possible, so as to meet the requirement of safety.And when the both ends lamp of LED straight lamps Head is when being correctly inserted into lamp holder, and the detection of detection decision circuit output high levle is made due to the impedance of LED straight lamps circuits itself is small Consequential signal.Testing result latch cicuit is according to testing result signal of the pulse signal to high levle for detecting pulse generating module The testing result latch signal of high levle is latched into, and testing result is also maintained when the operational phase.In this way, switch can be made Circuit maintains conducting and is persistently powered, and makes the normal operating when operational phase of LED straight lamps.
In other words, in some embodiments, when the lamp cap insertion lamp holder described in one end of the LED straight lamps is another When lamp cap described in one end is suspension joint or human body in electrical contact, the testing result letter of the detection decision circuit input low level Number to the testing result latch cicuit, then the detection pulse generating module exports a low level signal and is tied to the detection Fruit latch cicuit makes a testing result latch signal of the testing result latch cicuit output low level so that the switch electricity Road is ended, wherein the cut-off of the on-off circuit makes to end between the first installation sense terminal and the second installation sense terminal, Even if also the LED straight lamps enter a not on-state.
And in some embodiments, when two lamp cap of the LED straight lamps is correctly inserted into the lamp holder, the inspection The testing result signal of decision circuit input high levle is surveyed to the testing result latch cicuit, locks the testing result A testing result latch signal of circuit output high levle is deposited so that the on-off circuit turns on, wherein the on-off circuit is led It is logical to make to turn between the first installation sense terminal and the second installation sense terminal, even if also the LED straight lamps operate in one Conducting state.
It is worth noting that, the pulsewidth for the pulse signal that detection pulse generating module generates in 10us between 1ms, Effect only when LED straight lamps are powered moment, makes on-off circuit turn on the of short duration time using this pulse signal.It so can be with A pulse current is generated, detection decision circuit is flowed through and is detected judgement.Because generation be the pulse of short time due to long-time It turns on non-, Danger Electric shock risk can't be triggered.Furthermore testing result latch cicuit also maintains testing result when the operational phase, no Change the testing result previously latched due to circuit state changes again, and avoid the problem that testing result variation and cause.And pacify Filling detecting module (i.e. on-off circuit, detection pulse generating module, testing result latch cicuit and detect decision circuit) can be with It is integrated into chip, can so be embedded into circuit, the circuit cost and volume of installation detecting module can be saved.
Though applicant in previous case, such as:In CN106015996A, it is proposed that using detecting pulse generating module The first pulse signal and the second pulse signal are generated so that detection decision circuit is detected judgement, applicant is when implementing to this The embodiment of scheme has carried out further improvement, it is intended to reduce the volume of detecting module and further improve what detection judged Precision.Next the detailed improved embodiment of description.
Fig. 3 E are referred to, are the detection decision circuit schematic diagram according to the utility model embodiment.Detect decision circuit 2770 include：One resistance 2774 (the 9th resistance), one end connect the emitter-base bandgap grading end of transistor 2782, and the other end of resistance 2774 Connect LED power circuit the other end (such as：Second installation sense terminal 2522)；One diode 2775 (the second diode), tool There are an anode tap and a cathode terminal, which connects one end of resistance 2744；One comparator 2772 (the second comparator), has One first input end, one second input terminal and an output terminal, one setting signal of first input end connection (such as：Reference voltage Vref is 1.3V in the present embodiment, so without being limited thereto), which connects the cathode terminal of diode 2775, and comparator The frequency input of 2772 output terminal connection D flip-flop 2762；One comparator 2773 (the 3rd comparator) has one first Input terminal, one second input terminal and an output terminal, the first input end connect the cathode terminal of diode 2775, second input terminal Connect another setting signal (such as：Another reference voltage Vref is 0.3V in the present embodiment, so without being limited thereto), and comparator Output terminal connection D flip-flop 2762 frequency input；One resistance 2776 (the tenth resistance), one end connect driving electricity Pressure；One resistance 2777 (the 11st resistance), the second input terminal of the other end and comparator 2772 of one end connection resistance 2776, and The other end ground connection of resistance 2777；And a capacitance 2778 (the 5th capacitance), it is in parallel with resistance 2777.In certain embodiments, Above-mentioned diode 2775, comparator 2773, resistance 2776, resistance 2777 and capacitance 2778 can be omitted, and work as diode 2775 when being omitted, and the second input terminal of comparator 2772 is just directly connected to one end of resistance 2774.In certain embodiments, Consider that resistance 2774 can be two resistor coupled in parallel, and equivalent resistance is between 0.1 ohm~5 ohm based on power factor (PF).
Next just the integrated circuit running of installation detecting module is illustrated.First it is noted that this programme utilizes The principle that capacitance voltage will not undergo mutation；Capacitance in LED straight lamp electric power loops is before electric power loop conducting, both ends electricity Pressure is zero and short-circuit condition is presented in transient response；And when electric power loop is when LED straight lamps are correctly installed on lamp holder, transient state It is smaller and peak value of response electric current is larger to respond current-limiting resistance, when electric power loop is not when LED straight lamps are correctly installed on lamp holder, The principles such as transient response current-limiting resistance is larger and peak value of response electric current is smaller are carried out, and make the leakage current of LED straight lamps Less than 5MIU.It below will be with regard to LED straight lamps in normal work (LED straight lamps both ends lamp cap is correctly installed in lamp holder) (i.e. LED straight lamps one end lamp cap is installed in lamp holder and other end lamp cap contacts human body) embodiment during with changing lamp test The magnitude of current compares：
Wherein, in denominator part, Rfuse is the fuse resistance value (10 ohm) of LED straight lamps, and 500 ohm are simulation The conductive characteristic of human body is in the resistance value of transient response；And in molecular moiety, the maximum voltage of rms voltage 90V~305V is taken It is worth (305*1.414) and minimum voltage difference 50V.If from above example it is known that LED straight lamps both ends lamp cap just It is really installed in lamp holder, minimum transient current when working normally is 5A；But when LED straight lamps one end lamp cap is installed on lamp holder When interior and other end lamp cap contacts human body, maximum transient current but only has 845mA.Therefore, the utility model utilization can pass through Transient response flow through in LED power circuit capacitance (such as：The filter capacitor of filter circuit) electric current to detect LED straight lamps With the installation condition of lamp holder, that is, detect whether LED straight lamps are correctly installed in lamp holder, and in LED straight lamps not yet just Really when being installed in lamp holder, a protection mechanism is more provided to avoid user because getting an electric shock during false touch LED straight lamp current-carrying parts Problem.The above embodiments be only to illustrate the utility model and not limiting the implementation of the utility model.
Fig. 3 F are referred to, are the circuit diagram according to the installation detecting module of the utility model embodiment.Installation is detectd Survey module include on-off circuit 3080, detection pulse generating module 3040, control circuit 3060, detection decision circuit 3070 and Detect path circuit 3090.It detects decision circuit 3070 and couples detection path circuit 3090 through path 3081, to detect detection road Signal on footpath circuit 3090.It detects decision circuit 3070 and couples control circuit 3060 through path 3071 simultaneously, knot will be detected Fruit signal is sent to control circuit 3060 through path 3071.Detect 3040 passage path 3041 of pulse generating module coupling detection road Footpath circuit 3090, and pulse signal is generated to notify the opportunity point in 3090 conduction detection path of detection path circuit.Control circuit 3060 signal latch testing results according to testing result couple on-off circuit 3080 through path 3061, testing result are transmitted Or it is reflected into on-off circuit 3080.According to testing result, decision makes the first installation sense terminal 2521 and the to on-off circuit 3080 On or off between two installation sense terminals 2522.
In the present embodiment, the configuration for detecting pulse generating module 3040 may be referred to the detection pulse generating module of Fig. 3 B 2640.Fig. 3 B are refer to, when the framework of application detection pulse generating module 2640 is as detection pulse generating module 3040, The path 3041 of the present embodiment can be compared as path 2541, that is, OR gate 2652 can pass through path 3041 and be connected to detection path electricity Road 3090.In addition, detection pulse generating module 3040 can also passage path 3061 be connected to the output terminal of control circuit 3060.
Control circuit 3060 can be using controlling chip or any circuit with signal operation processing capacity to implement.When When control circuit 3060 judges user not in contact with fluorescent tube according to testing result signal, control circuit 3060 can control on-off circuit 3080 switching state, to make external power supply that can normally be provided to rear end when fluorescent tube is properly attached on lamp holder LED module.At this point, control circuit 3060 can end detection path.On the contrary, when control circuit 3060 is according to testing result signal When judging that user contacts fluorescent tube, because user has the risk of electric shock, therefore control circuit 3060 can be by on-off circuit 3080 Maintain the state of cut-off.
In an exemplary embodiment, control circuit 3060 and the driving circuit that on-off circuit 3080 can be in power module A part.For example, if driving circuit be switching dc to direct current transducer, on-off circuit 3080 can be direct current To the power switch of direct current transducer, and control circuit 3060 can be that the controller of the corresponding power switch (is, for example, PWM controller).
The detection that the configuration of detection decision circuit 3070 may be referred to the detection decision circuit 2670 or Fig. 3 E of Fig. 3 C judges Circuit 2770.Fig. 3 C are refer to, when the framework of application detection decision circuit 2670 is as detection decision circuit 3070, resistance 2672 can be omitted.The path 3081 of the present embodiment can be compared as path 2581, that is, the positive input terminal meeting of comparator 2671 It is connected to detection path circuit 3090.The path 3071 of the present embodiment can be compared as path 2571, that is, comparator 2671 Output terminal can be connected to control circuit 3060.Fig. 3 E are refer to, are sentenced in the framework of application detection decision circuit 2770 as detection When determining circuit 3070, resistance 2774 can be omitted.The path 3081 of the present embodiment can be compared as path 2781, that is, two poles The anode of pipe 2775 can be connected to detection path circuit 3090.The path 3071 of the present embodiment can be compared as path 2771, also That is the output terminal of comparator 2772 and 2773 can be connected to control circuit 3060.
The configuration of on-off circuit 3080 may be referred to the on-off circuit 2680 of Fig. 3 D.Fig. 3 D are refer to, in application switch electricity When the framework on road 2680 is as on-off circuit 3080, the path 3061 of the present embodiment can be compared as path 2561, and path 2581 will not be connected to detection decision circuit 2570, and be connected directly to the second installation sense terminal 2522.
As shown in Figure 3 G, Fig. 3 G are the detection road according to the utility model embodiment for the configuration of detection path circuit 3090 The circuit diagram of footpath circuit.Detecting path circuit 3090 includes transistor 3092 and resistance 3093 and 3094.Transistor 3092 have base stage, collector and emitter-base bandgap grading, and emitter-base bandgap grading is via 3041 connecting detection pulse generating module 3040 of path.Resistance 3094 concatenates Between the emitter-base bandgap grading and ground terminal of transistor 3092, resistance 3093 is serially connected in the collector and the first installation sense terminal of transistor 3092 Between 2521.
In the present embodiment, when transistor 3092 receives the pulse signal for detecting pulse generating module 3040 and being provided When, it can be turned on during pulse.In the case that in fluorescent tube, at least one end is installed to lamp holder, from the first installation sense terminal 2521 The transistor of conducting can be reacted on to a detection path (passing through resistance 3094, transistor 3092 and resistance 3093) of ground terminal 3092 and turn on therewith, and detection path nodes X on establish a voltage signal.When user is not in contact with fluorescent tube, The level of the voltage signal be according to resistance 3093 with 3094 partial pressure and determine.When user contacts fluorescent tube, human body Equivalent resistance can be equivalent to be serially connected between nodes X and ground terminal, that is, in parallel with resistance 3092.The voltage signal at this time Level is determined according to the equivalent resistance of resistance 3093,3094 and human body.Thereby, there is suitable resistance value through setting Resistance 3093 and 3094, you can the voltage signal in nodes X is allowd to reflect the state whether user touches fluorescent tube so that Corresponding testing result signal can be generated according to the voltage signal in nodes X by detecting decision circuit.
Fig. 3 H are referred to, are another detection pulse generating module schematic diagram according to the utility model embodiment.It detects Pulse generating module 2740 is surveyed to include：One resistance 2742 (the 6th resistance), one end connect a driving voltage；One capacitance 2743 ( Four capacitances), one end connects the other end of resistance 2742, and the other end ground connection of capacitance 2743；One schmitt trigger 2744, tool There are an input terminal and an output terminal, input terminal connection resistance 2742 and the connecting pin of capacitance 2743, the output terminal connecting detection As a result latch cicuit 2760；One resistance 2745 (the 7th resistance), the connecting pin of one end connection resistance 2742 and capacitance 2743；One is brilliant Body pipe 2746 (second transistor), has a base terminal, a collector terminal and an emitter-base bandgap grading end, which connects the another of resistance 2745 One end, emitter-base bandgap grading end ground connection；And a resistance 2747 (the 8th resistance), one end connect the base terminal of transistor 2746, and resistance 2747 other end connecting detection result latch cicuit 2760 and on-off circuit 2780.Detecting pulse generating module 2740 further includes Zener diode 2748 has an anode tap and a cathode terminal, the other end ground connection of anode tap connection capacitance 2743, the moon One end that extreme connection capacitance 2743 is connected with resistance 2742.
Fig. 3 I are referred to, are another detection decision circuit schematic diagram according to the utility model embodiment.Detection judges Circuit 2770 includes：One resistance 2774 (the 9th resistance), one end connects the emitter-base bandgap grading end of transistor 2782, and resistance 2774 is another End connection LED power circuit the other end (such as：Second installation sense terminal 2522)；One diode 2775 (the second diode), With an anode tap and a cathode terminal, which connects one end of resistance 2744；One comparator 2772 (the second comparator), With a first input end, one second input terminal and an output terminal, the first input end connect a setting signal (such as：With reference to Voltage Vref is 1.3V in the present embodiment, so without being limited thereto), which connects the cathode terminal of diode 2775, and compares Compared with the frequency input of the output terminal connection D flip-flop 2762 of device 2772；One comparator 2773 (the 3rd comparator), has One first input end, one second input terminal and an output terminal, the first input end connect the cathode terminal of diode 2775, this second Another setting signal of input terminal connection (such as：Another reference voltage Vref is 0.3V in the present embodiment, so without being limited thereto), and The frequency input of the output terminal connection D flip-flop 2762 of comparator；One resistance 2776 (the tenth resistance), one end connects the drive Dynamic voltage；One resistance 2777 (the 11st resistance), the other end of one end connection resistance 2776 and the second input of comparator 2772 End, and the other end ground connection of resistance 2777；And a capacitance 2778 (the 5th capacitance), it is in parallel with resistance 2777.In some implementations In example, above-mentioned diode 2775, comparator 2773, resistance 2776, resistance 2777 and capacitance 2778 can be omitted, when two poles When pipe 2775 is omitted, the second input terminal of comparator 2772 is just directly connected to one end of resistance 2774.In certain embodiments, Considered based on power factor (PF), resistance 2774 can be two resistor coupled in parallel, and equivalent resistance includes 0.1 ohm~5 ohm.
In conclusion the present embodiment can penetrate conduction detection path and detect the voltage signal on detection path to judge Whether user has electric shock risk.In addition, for compared to previous embodiment, the detection path of the present embodiment is additionally to establish, and It is non-be by the use of electric power loop as detection path.Since the electronic building brick detected on path additionally established is less than on electric power loop Electronic building brick, therefore the voltage signal on the detection path additionally established more can accurately reflect the touching of user State.
Furthermore similar to described in previous embodiment, the circuits/modules described in the present embodiment all or part of can also collect As the configuration of chip.
Those skilled in the art should can consider in light of actual conditions herein and recognize the revealed installation detecting module of this case embodiment not only Be can be used as distributed circuit design in LED straight lamps, can also by partial circuit component integration into an integrated circuit, Or whole circuit units are integrated into an integrated circuit, use the circuit cost and volume for saving installation detecting module.This Outside, detecting module is installed through modularization/integrated setting, may be such that installation detecting module can be easier to collocation in inhomogeneity In the LED straight lamps design of type, and then improve design compatibility.On the other hand, integrated installation detecting module is in LED straight tubes Under the application of lamp, because the circuit area inside fluorescent tube is reduced significantly therefore may be such that the lighting area of LED straight lamps is apparent Ground is promoted, and then improves the photocurrent versus light intensity performance of LED straight lamps.Furthermore since integrated design can make the group being integrated The operating current of part reduces and (reduces about 50%), and improves circuit work efficiency, therefore the power saved can be used for Should shine use to LED module so that the luminous efficiency of LED straight lamps can be promoted further.
In an exemplary embodiment, installation detecting module can be foregoing to substitute using the existing frequency signal of power module The function of the pulses generation mechanism of embodiment.For example, driving circuit (such as DC-DC converter) is in order to will generate Pulse Width Modulation (PWM) signal, itself will be there are one reference frequency.And the function of the pulses generation mechanism can utilize ginseng The reference frequency of pwm signal is examined to implement so that detecting pulse generating module 2540 and 2740, pulses generation auxiliary circuit 2840 And 2940 grade hardware circuits of signal generation unit can be omitted.In other words, install detecting module can in power module Other parts share circuit framework, so as to fulfill generate pulse signal function.
In addition one is attached to be mentioned that, in the description of this case, although the name for the functional property of each modules/circuits, Those skilled in the art is it should be appreciated that according to different circuit designs, and same circuit unit, which can be considered, different functions, also I.e. different modules/circuits may can share same circuit unit to realize its other circuit function.Therefore the work(of this case Energy life name is not limited to specific circuit unit and is only capable of including in specific modules/circuits, is first chatted in this conjunction bright.
In conclusion above-described embodiment has taught using electronic control and the mode of detecting to realize electrocution-proof protection.Phase For technology of the action using mechanical structure to carry out protection against electric shock, since the control of electronic type does not have with method for detecting The problem of mechanical fatigue, exists, and also helps modularization, the design of miniaturization.Therefore the anti-of fluorescent tube is carried out using electronic signal to touch Electric protection can have preferable reliability and service life.
In said program, the single-ended pin referred into electricity from one end lamp cap of LED straight lamps is electrically connected to external drive Signal, the pin that both-end refers into electricity from the both ends lamp cap of LED straight lamps are electrically connected to external drive signal.
In power supply module design, in some embodiments, it is contemplated that the power of power supply module and the size of lamp cap, by certain One power power-supply module is fabricated to 2 small power supply modules (it is cumulative and is predetermined power), is separately positioned on LED straight lamps two In the lamp cap of side.
In power supply module design, the external drive signal can be low-frequency ac signal (such as：Alternating current is carried For), high frequency ac signal (such as：Electric ballast is provided) or direct current signal is (by accessory power supply mould such as：Battery is carried For).
The external drive signal for low-frequency ac signal (such as：Alternating current is provided) or direct current signal (such as：Battery There is provided) LED straight lamps can be applied to both-end into electricity (wiring) mode, can also support that wherein one end is using as single-ended into electricity I.e. at this moment LED straight lamps support single-ended or both-end into electricity to (wiring) mode of (power supply), while LED straight lamps apply also for The occasion of emergency lighting, at this moment LED straight lamps need connect auxiliary power module.
In the auxiliary power module design of power supply module, energy-storage units can be battery or super capacitor, with LED module It is in parallel.Auxiliary power module is suitable for inclusion in the LED illumination module design of driving circuit.
When LED straight lamps are applied to both-end into electric (wiring) mode, installation detecting module is configured in LED straight lamps, To reduce the risk of leakage current.
In addition, " above " that above-described embodiment refers to refers to that the face on the light direction namely lamp plate of light source where light source is Above, and back to light source lamp plate for " below "." above " and " following " are merely to clearly illustrate this with reference to attached drawing Utility model is not that pad is equipped with above the limitation to the utility model, such as described lamp plate, is not to say that lamp plate can only Pad is equipped with above, it is understood that the wherein at least one side of lamp plate is equipped with pad.It is " soft board " described in the utility model and " hard In contrast plate " is also that i.e. hardboard is not necessarily referring to the hard plate of material with respect to being hardboard for soft board.
When direct current signal is as external drive signal, the power supply module of LED straight lamps can be omitted rectification circuit.
In the rectification circuit design of power supply module, the first rectification unit and the second rectification unit point in double rectification circuits Pin not with configuring in the both ends lamp cap of LED straight lamps couples.Double rectification units are suitable for the driving framework of Double-End Source.And And when being configured with an at least rectification unit, it can be adapted for the driving of low-frequency ac signal, high frequency ac signal or direct current signal Environment.
Double rectification units can be double half-wave rectification circuit, double-full-bridge rectifier circuit or half-wave rectifying circuit and full-bridge rectification The combination of circuit each one.
Can be each single pin (totally two pins) of both-end, each double pins of both-end in the pin design of LED straight lamps The framework of (totally four pins).Under the framework of each single pin of both-end, the rectification circuit design of single rectification circuit is applicable to. Under the framework of each double pins of both-end, the rectification circuit design of double rectification circuits is applicable to, and uses each any pin of both-end Or any single-ended double pins receive external drive signal.
In the filter circuit design of power supply module, can have Single Capacitance or π type filter circuits, after filtering out rectification Radio-frequency component in signal, and the direct current signal for providing low ripple is filtered signal.Filter circuit can also include LC and filter Circuit, high impedance is presented to specific frequency.Furthermore filter circuit can also include the filter being coupled between pin and rectification circuit Ripple unit, to reduce the electromagnetic interference caused by the circuit of LED light.When direct current signal is as external drive signal, LED straight tubes The power supply module of lamp can be omitted filter circuit.
In the LED illumination module design of power supply module, only comprising LED module or LED module and driving can be included Circuit.To ensure that the voltage in LED illumination module is unlikely overvoltage can also be occurred for regulator circuit and LED illumination wired in parallel. Regulator circuit can be voltage clamping circuit, such as：Zener diode, bi-directional voltage stabilizing pipe etc..When rectification circuit includes condenser network, A capacitance can be connected two-by-two between in the pin respectively held of both-end and a pin of the other end, to be carried out with condenser network Partial pressure acts on and is used as regulator circuit.
In only the design of LED module is included, when high frequency ac signal is as external drive signal, an at least rectified current Road includes condenser network (that is, comprising more than one capacitance), connects, makes with the full-bridge in rectification circuit or half-wave rectifying circuit Condenser network is equivalent to impedance as current regulating circuit and to adjust the electric current of LED module under high frequency ac signal.Thereby, When different electric ballasts provides the high frequency ac signal of different voltages, the electric current of LED module can be adjusted default It is unlikely in current range that there is a situation where overcurrents.Energy circuit is released furthermore it is possible to additionally increase, it is in parallel with LED module, in outside Drive signal stops after providing, aid in by filter circuit release can, caused by reducing filter circuit or other circuits Resonance causes the situation of LED module flashing.In comprising LED module and driving circuit, driving circuit can be that direct current turns DC boosting conversion circuit, DC to DC decompression converting circuit or DC to DC lifting voltage conversion circuit.Driving circuit system The electric current stabilization of LED module in setting electric current value, can also be heightened according to the high or low of external drive signal to correspond to Or turn down setting electric current value.Furthermore it is possible to additionally increase mode selector switch between LED module and driving circuit, make electric current LED module is directly inputted by filter circuit or LED module is inputted after overdrive circuit.
Furthermore it is possible to additionally increase protection circuit to protect LED module.Protection circuit can detect the electric current of LED module And/or voltage starts corresponding overcurrent or overvoltage protection to correspond to.
In the LED module design of power supply module, it is (that is, single that LED module can include the multi-string LED component being connected in parallel to each other The LED groups of one LED chip or multiple and different color LED chips composition) it goes here and there, the LED component in each LED component string can be each other It connects and forms netted connection.
That is, features described above can be made to arbitrary permutation and combination, and for the improvement of LED straight lamps, to continue Improve applicant previously proposed CN 105465640, CN 205424492, CN 106015996, CN 105472836 it is single or Its deficiency combined provides safer, it is easier to manufacture and/or characteristic more preferably LED straight lamps.

Claims (17)

1. a kind of circuit for installing detecting module, is configured in LED straight lamps, for detecting whether the LED straight lamps are used Family electric shock risk, which is characterized in that it is described installation detecting module include on-off circuit, detection pulse generating module, control circuit, Decision circuit and detection path circuit are detected, wherein：
The detection pulse generating module couples the detection path circuit, and enters detection-phase in the installation detecting module When generate pulse signal to notify the opportunity point in the detection path circuit conduction detection path；
The detection decision circuit couples the detection path circuit, to detect the detection road in the detection path conducting Signal on the circuit of footpath；
The detection decision circuit couples the control circuit, and testing result is sent to the control circuit；
The control circuit couples the on-off circuit, for controlling on-off circuit according to the testing result；
The switching circuit in series is in electric power loop, to control the LED straight lamps operation in conducting state or be not turned on shape State；
When testing result instruction has user's electric shock risk, the on-off circuit ends according to the testing result；And
When the testing result indicates no user electric shock risk, the on-off circuit is turned on according to the testing result.
2. the circuit of installation detecting module according to claim 1, which is characterized in that the detection pulse generating module bag Containing the first capacitance (2642), the second capacitance (2645) and the 3rd capacitance (2646), first resistor (2643), second resistance (2647) And 3rd resistor (2648), the first buffer (2644) and the second buffer (2651), reverser (2650), the first diode (2649) and the first OR gate (2652), wherein：
First capacitance (2642) and first resistor (2643) are series between a driving voltage and reference potential, tie point coupling The input terminal of first buffer (2644)；
Second resistance (2647) is coupled to the input terminal of a driving voltage and reverser (2650)；
3rd resistor (2648) is coupled between the input terminal and a reference potential of the second buffer (2651)；
The positive ending grounding of first diode (2649), negative terminal are also coupled to the input terminal of the second buffer (2651)；
One end of second capacitance (2645) and one end of the 3rd capacitance (2646) couple the output of the first buffer (2644) jointly End, the other end of the second capacitance (2645) connect the input terminal of reverser (2650), and the other end of the 3rd capacitance (2646) then coupling Connect the input terminal of the second buffer (2651)；
The output terminal of reverser (2650) and the output terminal of the second buffer (2651) couple the input terminal of the first OR gate (2652).
3. the circuit of installation detecting module according to claim 1, which is characterized in that the detection pulse generating module bag It includes：
6th resistance (2742), one end connect a driving voltage；
4th capacitance (2743), one end connect the other end of the 6th resistance (2742), and another termination of the 4th capacitance (2743) Ground；
Schmitt trigger (2744), has an input terminal and an output terminal, which connects the 6th resistance (2742) and the The connecting pin of four capacitances (2743), the output terminal connect the detection path circuit；
7th resistance (2745), one end connect the connecting pin of the 6th resistance (2742) and the 4th capacitance (2743)；
Second transistor (2746), has a base terminal, a collector terminal and an emitter-base bandgap grading end, which connects the 7th resistance (2745) the other end, emitter-base bandgap grading end ground connection；
8th resistance (2747), the base terminal of one end connection second transistor (2746), and the other end of the 8th resistance (2747) Connecting detection path circuit and the output terminal of the control circuit；
Zener diode (2748), has an anode tap and a cathode terminal, anode tap ground connection, which connects the 4th capacitance (2743) one end being connected with the 6th resistance (2742).
4. the circuit of installation detecting module according to claim 1, which is characterized in that the on-off circuit is direct current to straight The power switch of stream transformer, and the control circuit is the controller of the corresponding power switch.
5. it is according to claim 1 installation detecting module circuit, which is characterized in that it is described detection decision circuit include than Compared with device, the end of oppisite phase of the comparator is received with reference to level signal, and positive input terminal is connected to the detection path circuit, and output terminal connects It is connected to the control circuit.
6. the circuit of installation detecting module according to claim 1, which is characterized in that the detection decision circuit includes：
9th resistance (2774), one end connect one end of the on-off circuit, and the other end connection institute of the 9th resistance (2774) State an installation sense terminal of installation detecting module；
Second diode (2775), has an anode tap and a cathode terminal, which is connected to the detection path circuit；
Second comparator (2772) has first input end, the second input terminal and output terminal, one setting of first input end connection Signal, second input terminal connect the cathode terminal of the second diode (2775), and the output terminal connection of the second comparator (2772) To control circuit；
3rd comparator (2773) has first input end, the second input terminal and output terminal, first input end connection the two or two The cathode terminal of pole pipe (2775), which connects another setting signal, and the output terminal of the 3rd comparator (2773) connects It is connected to control circuit；
Tenth resistance (2776), one end connection driving voltage；
11st resistance (2777), one end connect the tenth resistance (2776) the other end and the second comparator (2772) it is second defeated Enter end, and the other end ground connection of the 11st resistance (2777)；5th capacitance (2778), it is in parallel with the 11st resistance (2777).
7. the circuit of installation detecting module according to claim 1, which is characterized in that the on-off circuit includes a crystal Pipe, base terminal are connected with the control circuit, and collector terminal and emitter-base bandgap grading end are detectd respectively via the first installation of installation detecting module Survey end and the second installation sense terminal connect the electric power loop, according to testing result, make the first installation sense terminal and On or off between the second installation sense terminal.
8. the circuit of installation detecting module according to claim 1, which is characterized in that the detection path circuit includes crystalline substance Body pipe and the 12nd resistance (3094) and the 13rd resistance (3093), wherein：
The transistor has base stage, collector and emitter-base bandgap grading, and emitter-base bandgap grading connects the detection pulse generating module；
12nd resistance (3094) is concatenated between the emitter-base bandgap grading of the transistor and ground terminal, and the 13rd resistance (3093) is serially connected in described Between the collector of transistor and the first installation sense terminal；
Wherein described detection path includes the 12nd resistance (3094), the 13rd resistance (3093) and the transistor Concatenation path.
9. the circuit of installation detecting module according to claim 8, which is characterized in that the transistor receives detection arteries and veins Punching occur module pulse signal when, the transistor turns during pulse, using detecting detection path circuit on signal as Voltage signal.
10. the circuit of installation detecting module according to claim 8, which is characterized in that be not in contact with fluorescent tube in user When, the level of the voltage signal is the partial pressure according to the 12nd resistance (3094) with the 13rd resistance (3093) and determines.
11. the circuit of installation detecting module according to claim 8, which is characterized in that
When user contacts fluorescent tube, the level of the voltage signal is according to the 12nd resistance (3094) and the 13rd resistance (3093) and the equivalent resistance of human body is determined；
The equivalent resistance of the human body is serially connected between the first installation sense terminal and ground terminal.
12. the circuit of installation detecting module according to claim 1, which is characterized in that detection pulse generating module generates Pulse signal pulsewidth in 10us between 1ms.
13. the circuit of installation detecting module according to claim 1, which is characterized in that detection pulse generating module is also used In the pulse signal that two high levles are generated in detection-phase.
14. the circuit of installation detecting module according to claim 1, which is characterized in that the electronics on the detection path Component is less than the electronic building brick on the electric power loop.
15. a kind of LED straight lamps, comprising power module and two lamp caps, have respectively on two lamp cap single pin or double pins with External drive signal is received from the pin of both ends lamp cap, which is characterized in that the power supply mould through the mode of connection of both-end into electricity There is the circuit of the installation detecting module any one of claim 1 to 14, and the electric power loop is formed in block Both ends lamp cap between electric pin.
16. LED straight lamps according to claim 15, which is characterized in that it is described installation detecting module circuit with it is described Rectification circuit connection in power module.
17. a kind of circuit of power module, applied in LED straight lamps, the power module includes rectification circuit and filtered electrical Road, which is characterized in that there is the electricity of the installation detecting module any one of claim 1 to 14 in the power module Road.
CN201720873163.XU 2016-03-09 2016-12-07 A kind of installation detecting module and the circuit of power module and LED straight lamps Active CN207460540U (en)

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CN2016101325137 2016-03-09
CN201610132513 2016-03-09
CN2016101421401 2016-03-14
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CN2016101777064 2016-03-25
CN201610177706 2016-03-25
CN2016103278060 2016-05-18
CN201610327806 2016-05-18
CN201610452437 2016-06-20
CN2016104524378 2016-06-20
CN2016108765937 2016-10-08
CN201610876593 2016-10-08
CN201610878349 2016-10-08
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CN201610890527 2016-10-12
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CN201610955342 2016-10-27
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CN201610975119 2016-11-03
CN201610975119X 2016-11-03
CN2016110573579 2016-11-25
CN201611057357 2016-11-25
CN2016111087239 2016-12-06
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CN108882458A (en) * 2018-07-25 2018-11-23 东莞市灿光电子科技有限公司 A kind of LED lamp tube and method of protection against electric shock
TWI693769B (en) * 2018-11-28 2020-05-11 緯創資通股份有限公司 Power supply system, electronic device and power supply method thereof
US10784796B2 (en) 2018-11-28 2020-09-22 Wistron Corporation Electronic device and power supply method thereof

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