CN102209414B - LED lighting device and LED illuminator - Google Patents
LED lighting device and LED illuminator Download PDFInfo
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- CN102209414B CN102209414B CN201110064940.3A CN201110064940A CN102209414B CN 102209414 B CN102209414 B CN 102209414B CN 201110064940 A CN201110064940 A CN 201110064940A CN 102209414 B CN102209414 B CN 102209414B
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Abstract
本发明是有关于一种LED点灯装置以及LED照明器具。该LED点灯装置(1)包括：直流电源电路(2)，以向平滑用电容器(C3)的两端间输出恒电压的方式而形成；发光二极管(3)，连接于平滑用电容器(C3)的两端间；电流检测电路(4)，检测流经发光二极管(3)的电流；以及旁路电路(5)，具有连接于平滑用电容器(C3)的两端间的第2电阻(R2)以及切换元件(Tr1)的串联电路，在电流检测电路(4)检测出规定值以上的电流流动时，控制该切换元件(Tr1)成导通。
The invention relates to an LED lighting device and an LED lighting appliance. The LED lighting device (1) includes: a DC power supply circuit (2) formed to output a constant voltage between both ends of a smoothing capacitor (C3); a light emitting diode (3) connected to the smoothing capacitor (C3) Between the two ends of the current detection circuit (4), which detects the current flowing through the light-emitting diode (3); and the bypass circuit (5), which has the second resistor (R2) connected between the two ends of the smoothing capacitor (C3) ) and a switching element (Tr1), the switching element (Tr1) is controlled to be turned on when the current detection circuit (4) detects that a current exceeding a predetermined value flows.
Description
Technical field
The LED ligthing paraphernalia that the present invention relates to a kind of LED ignition device that light-emitting diode (diode) is lit a lamp and possess this LED ignition device.
Background technology
Light-emitting diode (Light Emitting Diode, LED) is as light source and for the common ligthing paraphernalia of using.This ligthing paraphernalia is equipped with a plurality of light-emitting diodes to obtain the illumination (brightness) of regulation.And, in order to make the light output from each light-emitting diode, be high output as far as possible, there is the flow through situation of light-emitting diode of the constant current that makes to approach maximum permissible current.Herein, once sharply change occurs supply voltage, have little time sometimes to carry out constant current control, thereby cause the overcurrent light-emitting diode of flowing through.And, from the ignition device switching on power, pulling down light-emitting diode, or when light-emitting diode is connected in to ignition device again, also sometimes have the overcurrent light-emitting diode of flowing through.
And, propose to have a kind of flow through LED drive unit (with reference to patent documentation 1) of LED unit of overcurrent that prevents when connecting again LED unit (unit).The LED drive unit of this background technology possesses releasably to connect the bindiny mechanism of LED unit and differentiate LED unit and is connected in the non-loaded mechanism for identifying that bindiny mechanism or LED unit Yi Cong bindiny mechanism pull down, and the series circuit of resistor and switching (switching) the element mechanism of discharging is connected in parallel in the smoothing capacitor (condenser) of DC-to-DC switching mechanism.And, it is that LED unit is while being connected in bindiny mechanism being differentiated by non-loaded mechanism for identifying that conducting disconnects (ON/OFF) switching mechanism, switching device is made as to off-state, and be LED unit Yi Cong bindiny mechanism while pulling down being differentiated by non-loaded mechanism for identifying, switching device is switched to conducting state from off-state.
[prior art document]
[patent documentation]
[patent documentation 1] Japanese Patent Laid-Open 2010-55824 communique (7-8 page, the 1st figure)
When the LED drive unit of patent documentation 1 is not connected in bindiny mechanism in LED unit, electric discharge mechanism is connected in parallel in to smoothing capacitor, make lower voltage between the two ends of smoothing capacitor, thereby while being connected in bindiny mechanism in LED unit, prevent the overcurrent LED unit of flowing through.The caused overcurrent such as sharply change of the supply voltage in the time of therefore, cannot preventing that LED unit the is connected in bindiny mechanism LED unit of flowing through.
And LED drive unit is provided with non-loaded mechanism for identifying or conducting disconnects the conducting off-state of the switching device of switching mechanism ，Yi switch discharges mechanism, so there is circuit structure to become complicated, thus the shortcoming of the high price that becomes.
As can be seen here, above-mentioned existing LED ignition device and LED ligthing paraphernalia, in structure and use, obviously still have inconvenience and defect, and are urgently further improved.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but have no for a long time applicable design always, by development, completed, and common product does not have appropriate structure to address the above problem, this is obviously the problem that the anxious wish of relevant dealer solves.Therefore how to found a kind of LED ignition device and LED ligthing paraphernalia of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Summary of the invention
The object of the invention is to, overcome the defect that existing LED ignition device and LED ligthing paraphernalia exist, and the LED ligthing paraphernalia that a kind of LED ignition device of new structure is provided and possesses this LED ignition device, technical problem to be solved can form at an easy rate it and can suppress the overcurrent light-emitting diode of flowing through, and is very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to the LED ignition device described in technical scheme 1 of the present invention, comprise: DC power supply circuit, there is smoothing capacitor, to export the mode of constant voltage between the two ends to this smoothing capacitor, form; Light-emitting diode, is connected between the two ends of described smoothing capacitor; Current detection circuit, detects the electric current of this light-emitting diode of flowing through; And bypass (bypass) circuit, there is resistance between the two ends that are connected in described smoothing capacitor and the series circuit of switching device, when current detection circuit detects the electric current of flowing through more than setting, control described switching device and become conducting.
In the present invention and following each invention, as long as do not mention especially, each structure is as follows.
The two ends of smoothing capacitor refer to the output of DC power supply circuit.
DC power supply circuit is so long as to the direct voltage of exporting constant voltage between the two ends of smoothing capacitor, battery (battery) for example, alternating voltage is carried out to rectification or the level and smooth device of rectification, and the device etc. that is connected with boost chopper (chopper) circuit, buck-boost chopper circuit or buck chopper device circuit on described battery or device.
Light-emitting diode can be also one or more, a plurality of if, be connected in series or connect side by side any all can.
The resistance value of resistance is configured to bring into play function as discharge resistance.
" electric current more than setting " refers to the overcurrent of the light-emitting diode of flowing through.And setting for example can be made as the maximum permissible current of the light-emitting diode of can flowing through.
According to the present invention, when the electric current more than overcurrent is setting is flowed through current detection circuit, under the state of light-emitting diode lighting, the conducting during this is whole of the switching device of bypass circuit, thus resistance is connected between the two ends of smoothing capacitor.Between the two ends of smoothing capacitor, voltage discharges to surpassing the overvoltage of this constant voltage by resistance, thereby becomes constant voltage.Thus, suppress the overcurrent light-emitting diode of flowing through.
The invention of the LED ignition device described in technical scheme 2 is according to the invention of the LED ignition device described in technical scheme 1, it comprises: current blocking circuit, than the more close LED side of described current detection circuit, have the switching device being connected in series with light-emitting diode, it is that conducting corresponding to the switching device of described bypass circuit disconnects and is controlled that the conducting of this switching device disconnects.
Light-emitting diode, when switching device conducting, is connected between the two ends of smoothing capacitor and lights a lamp, and when switching device disconnects, and is not attached between the two ends of smoothing capacitor and turns off the light.
And, switching device conducting when the switching device of bypass circuit disconnects, and disconnect when switching device conducting.
According to the present invention, when the electric current more than overcurrent is setting is flowed through current detection circuit, the switching device conducting of bypass circuit, and switching device disconnects.Light-emitting diode is not attached between the two ends of smoothing capacitor, thereby flows through without overcurrent.And, the electric current current detection circuit of no longer flowing through, the switching device of bypass circuit disconnects, and switching device conducting.
In switching device conducting until disconnect during, the resistance of bypass circuit is connected between the two ends of smoothing capacitor.Between the two ends of smoothing capacitor, voltage discharges to surpassing the overvoltage of this constant voltage by resistance, thereby becomes constant voltage.Thus, light-emitting diode is applied to constant voltage and the constant current of flowing through, to suppress overcurrent, flow through.
The object of the invention to solve the technical problems also realizes by the following technical solutions.According to the LED ligthing paraphernalia described in technical solution of the present invention 3, comprise: according to the LED ignition device described in technical scheme 1 or 2; And apparatus body, setting this LED ignition device.
According to the present invention, due to the LED ignition device possessing described in technical scheme 1 or 2, therefore can provide a kind of overcurrent that can suppress to flow through as the LED ligthing paraphernalia of the light-emitting diode of light source.
The present invention compared with prior art has obvious advantage and beneficial effect by technique scheme, and LED ignition device of the present invention and LED ligthing paraphernalia at least have following advantages and beneficial effect:
According to the invention of technical scheme 1, during overcurrent is flowed through current detection circuit whole, the resistance of bypass circuit is connected between the two ends of smoothing capacitor, by resistance, the overvoltage between the two ends of smoothing capacitor is discharged, therefore under the state of light-emitting diode lighting, the overcurrent light-emitting diode of flowing through can be suppressed, thereby the destruction of the light-emitting diode that causes because of overcurrent or short life etc. can be prevented.
According to the invention of technical scheme 2, when overcurrent is flowed through current detection circuit resistance, the conducting of the switching device by bypass circuit, the disconnection of the switching device of current blocking circuit, light-emitting diode is no longer connected between the two ends of smoothing capacitor, thereby no longer include the overcurrent light-emitting diode of flowing through, and when the switching device conducting of bypass circuit, resistance is connected between the two ends of smoothing capacitor, by resistance, the overvoltage of voltage between the two ends of smoothing capacitor is discharged, therefore can suppress the overcurrent light-emitting diode of flowing through, thereby can prevent the destruction of the light-emitting diode that causes because of overcurrent or short life etc.
According to the invention of technical scheme 3, owing to possessing, suppress overcurrent and flow through as the LED ignition device of the light-emitting diode of light source, therefore the LED ligthing paraphernalia of a kind of destruction that prevents the light-emitting diode that causes because of overcurrent or short life etc. can be provided.
In sum, the invention relates to a kind of LED ignition device and LED ligthing paraphernalia.This LED ignition device comprises: DC power supply circuit, forms to export the mode of constant voltage between the two ends to smoothing capacitor; Light-emitting diode, is connected between the two ends of smoothing capacitor; Current detection circuit, detects the electric current of the light-emitting diode of flowing through; And bypass circuit, there is the 2nd resistance between the two ends that are connected in smoothing capacitor and the series circuit of switching device, during current flowing more than current detection circuit detects setting, control this switching device and become conducting.The present invention has significant progress technically, and has obvious good effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other object of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 means the schematic circuit diagram of the LED ignition device of example 1 of the present invention.
Fig. 2 means the variation diagram of electric current of the light-emitting diode of flowing through of example 1 of the present invention.
Fig. 3 means the schematic circuit diagram of the LED ignition device of example 2 of the present invention.
Fig. 4 means the approximate three-dimensional map of the LED ligthing paraphernalia of example 3 of the present invention.
1,15:LED ignition device 2: DC power supply circuit/current detection circuit
3: light-emitting diode/current detection circuit 4: current detection circuit
5: bypass circuit 6a, 6b: input terminal
7a, 7b, 7a1,7a2,7b1,7b2: lead-out terminal 8: connector
9:AC-DC change-over circuit 10: buck chopper device circuit
11: full-wave rectifying circuit 12: noise filter circuit
13: control circuit 14:LED circuit
16: current blocking circuit 17:LED ligthing paraphernalia
18: apparatus body 19: light source cell
20: luminous element 21: cell body
21a: opening 22: lid
23: light-passing board 24: screw
A1: mid point C1, C2, C4: capacitor
C3: smoothing capacitor D1: diode
E: ground wire L1: inductor
Q1: field-effect transistor R1: the 1st resistance
R2: as the 2nd resistance R 3 of resistance: resistance
T1: transformer Tr1: as the N-type bipolar transistor of switching device
Tr2: as the N-type bipolar transistor Vs of switching device: commercial ac power source
Embodiment
For further setting forth the present invention, reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, LED ignition device and its embodiment of LED ligthing paraphernalia, structure, feature and effect thereof to proposing according to the present invention, be described in detail as follows.
Relevant aforementioned and other technology contents of the present invention, Characteristic can be known and present in the following detailed description coordinating with reference to graphic preferred embodiment.By the explanation of embodiment, when can be to reach technological means and the effect that predetermined object takes to obtain one more deeply and concrete understanding to the present invention, yet appended graphic being only to provide with reference to the use with explanation be not used for the present invention to be limited.
In the present invention, between the two ends of the smoothing capacitor of DC power supply circuit, be connected with the series circuit of resistance and switching device.And during overcurrent is flowed through current detection circuit whole, switching device is switched on, and by resistance, the overvoltage between the two ends of smoothing capacitor is discharged.Thus, suppress the overcurrent light-emitting diode of flowing through.
[example 1]
Fig. 1 and Fig. 2 represent example 1 of the present invention, and Fig. 1 is the schematic circuit diagram of LED ignition device, and Fig. 2 is the variation diagram of electric current of light-emitting diode of flowing through.
In Fig. 1, LED ignition device 1 has DC power supply circuit 2, light-emitting diode 3, current detection circuit 4 and bypass circuit 5 and forms.And input terminal 6a, 6b are connected in commercial ac power source Vs, lead-out terminal 7a, 7b are located in connector (connector) 8.
DC power supply circuit is to consist of AC-DC (Alterna t ing Current-Di rec t Current, AC-DC) change-over circuit 9 and buck chopper device circuit 10.AC-DC change-over circuit 9 be there is full-wave rectifying circuit 11, (transformer) T1 that possesses transformer and noise filter (noisefilter) circuit 12 that forms and with the capacitor C1 playing a role, form as noise filter.And the input terminal of full-wave rectifying circuit 11 is connected in input terminal 6a, 6b via noise filter circuit 12.Between the lead-out terminal of full-wave rectifying circuit 11, connecting capacitor C1.The low potential side of capacitor C1 is connected in ground wire (earth) E via capacitor C2.The alternating voltage of 9 couples of commercial ac power source Vs of AC-DC change-over circuit for example AC100V carries out full-wave rectification, and full-wave rectified voltage is exported between the two ends of capacitor C1.
Buck chopper device circuit 10 is formed with well-known structure, and is connected in the outlet chamber of AC-DC change-over circuit 9.That is, described buck chopper device circuit 10 has: be connected in parallel in field-effect transistor (transistor) Q1 of capacitor C1 of AC-DC change-over circuit 9 and the series circuit of diode D1; And be connected in parallel in inductor (inductor) L1 of diode D1 and the series circuit of smoothing capacitor C3.Between the two ends of smoothing capacitor C3, be the outlet chamber of buck chopper device circuit 10 and be the outlet chamber of DC power supply circuit 2, and be connected in lead-out terminal 7a, 7b.On this lead-out terminal 7a, 7b, connecting light-emitting diode 3.
And, between the grid of field-effect transistor Q1 (gate), source electrode (source), be connected in control circuit 13.Control circuit 13 for example the control signal of DC3V～4V (driving voltage) is applied between the grid (gate), source electrode of field-effect transistor Q1 so that field-effect transistor Q1 conducting, and the mode of itself light-emitting diode 3 so that constant current is flowed through is exported control signal and made field-effect transistor Q1 carry out conducting to disconnect action.Thus, from the direct voltage of AC-DC change-over circuit 9 outputs, be subject to copped wave (chopping), thereby produce constant voltage between the two ends of smoothing capacitor C3.
So, DC power supply circuit 2 has smoothing capacitor C3, and forms, the mode of light-emitting diode 3 so that constant current is flowed through and to output dc voltage between the two ends of smoothing capacitor C3.
Light-emitting diode 3 forms a plurality of LED circuits 14 that form that are connected in series.Light-emitting diode 3 consists of one species, and form, when between the two ends that apply smoothing capacitor C3 between the two ends at LED circuit 14 during voltage (constant voltage), there is constant current to flow through and light a lamp, and radiate the visible ray (for example white light) as illumination light.
The flow through electric current of light-emitting diode 3 of 4 pairs of current detection circuits detects, and utilizes the 1st resistance R 1 to detect this electric current.The 1st resistance R 1 is inserted between the negative side and light-emitting diode 3 of smoothing capacitor C3.The electric current of light-emitting diode 3 of flowing through is converted into voltage between the two ends of the 1st resistance R 1, and is input to control circuit 13.
In addition, constant current for example can be set as slightly the electric current lower than the maximum permissible current of light-emitting diode 3, and setting can be set as surpassing slightly the electric current of maximum permissible current.
Secondly, the effect of example 1 of the present invention is narrated.
The electric current of light-emitting diode 3 of flowing through is that the 1st resistance R 1 by current detection circuit 4 detects, and is input to the control circuit 13 of DC power supply circuit 2.Control circuit 13 comes the conducting of the field-effect transistor Q1 of controlled hypotension chopper circuit 10 to disconnect action in the flow through mode of light-emitting diode 3 of constant current, so that direct voltage output is between the two ends of smoothing capacitor C3.Thus, the constant current light-emitting diode 3 of flowing through, light-emitting diode 3 is stably lit a lamp.
And when the loose contact of the connector 8 that the variation in voltage sharply of commercial ac power source Vs occurs or cause because of vibration etc. etc., between the two ends of smoothing capacitor C3, voltage rises sometimes.For this voltage, rise, though control circuit 13 carries out constant current control, have little time sometimes to carry out constant current control, thereby as shown in Figure 2, have the more than setting electric current light-emitting diode 3 of flowing through.
Electric current more than setting is overcurrent while flowing through light-emitting diode 3, because voltage between the two ends of the 1st resistance R 1 of current detection circuit 4 rises, thereby makes transistor Tr 1 conducting of bypass circuit 5.Transistor Tr 1 is conducting during the 1st resistance R 1 detects overcurrent whole.
During transistor Tr 1 conducting, the 2nd resistance R 2 of bypass circuit 5 is connected between the two ends of smoothing capacitor C3, and between the two ends of smoothing capacitor C3, voltage is discharged by the 2nd resistance R 2.Thus, when between the two ends of smoothing capacitor C3, voltage declines gradually, the overcurrent of the light-emitting diode 3 of flowing through reduces gradually, and between the two ends of the 1st resistance R 1 of current detection circuit 4, voltage declines gradually
And when the electric current of the 1st resistance R 1 of flowing through is during lower than setting, the voltage producing between the two ends of the 1st resistance R 1 cannot make transistor Tr 1 conducting of bypass circuit 5, thereby transistor Tr 1 disconnects.Thus, the 2nd resistance R 2 is no longer connected between the two ends of smoothing capacitor C3, thereby between the two ends of smoothing capacitor C3, the electric discharge of voltage is stopped.Herein, light-emitting diode 3 is in transistor Tr 1 conducting and also light a lamp during between the two ends of smoothing capacitor C3, voltage is discharged.
And, after transistor Tr 1 disconnects, by the constant current of control circuit 13, control, make the constant current light-emitting diode 3 of flowing through.
As described above, during overcurrent is flowed through the 1st resistance R 1 whole of current detection circuit 2, the 2nd resistance R 2 of bypass circuit 5 is connected between the two ends of smoothing capacitor C3, overvoltage between the two ends of smoothing capacitor C3 is discharged by the 2nd resistance R 2, under the state of therefore lighting a lamp at light-emitting diode 3, the overcurrent light-emitting diode 3 of flowing through can be suppressed, thereby the destruction of the light-emitting diode 3 that causes because of overcurrent or short life etc. can be prevented.
And the conducting of the transistor Tr 1 of bypass circuit 5 disconnects controlling and has adopted according to the easy structure that between the two ends of the 1st resistance R 1 of current detection circuit 4, voltage carries out, and therefore can form at an easy rate LED ignition device 1.
In addition, the transistor Tr 1 of bypass circuit 5 also can be controlled to by the control circuit 13 of DC power supply circuit 2, conducting when current detection circuit 4 detects overcurrent and flows through.
[example 2]
Fig. 3 means the schematic circuit diagram of the LED ignition device of example 2 of the present invention.In addition, for the part identical with Fig. 1, also description thereof is omitted to mark identical symbol.
Transistor Tr 2, when the transistor Tr 1 of bypass circuit 5 disconnects, is come base stage to supply with electric current and conducting via the 2nd resistance R 2 from smoothing capacitor C3.Thus, light-emitting diode 3 is connected between the two ends of smoothing capacitor C3 and lights a lamp.
And transistor Tr 2, when transistor Tr 1 conducting of bypass circuit 5, makes base stage and transmitting intereelectrode short-circuit and disconnects via the 1st resistance R 1 of current detection circuit 4.Thus, light-emitting diode 3 is blocked with smoothing capacitor C3, thereby no longer include electric current, flows through.So, transistor Tr 2 is subject to conducting disconnection control corresponding to the conducting disconnection of the transistor Tr 1 of bypass circuit 5.
Secondly, the effect of example 2 of the present invention is narrated.
Electric current more than setting is overcurrent while flowing through the 1st resistance R 1 of current detection circuit 4, and between the two ends of the 1st resistance R 1, voltage increases, transistor Tr 1 conducting of bypass circuit 5.When transistor Tr 1 conducting, the transistor Tr 2 of current blocking circuit 16 disconnects.Thus, light-emitting diode 3 is no longer connected between the two ends of smoothing capacitor C3, thereby no longer include electric current, flows through.And electric current is no longer flowed through and no longer produced voltage between the two ends of the 1st resistance R 1, the 1 resistance R 1 of current detection circuit 4, thus, the transistor Tr 1 of bypass circuit 5 disconnects.When transistor Tr 1 disconnects, transistor Tr 2 conductings of this current blocking circuit 16, light-emitting diode 3 is connected in smoothing capacitor C3.
And, in transistor Tr 1 conducting of bypass circuit 5 until disconnect during, the 2nd resistance R 2 of bypass circuit 5 is connected between the two ends of smoothing capacitor C3.Between the two ends of smoothing capacitor C3, voltage discharges by the 2nd resistance R 2.
And, until no longer include flow through the 1st resistance R 1 of current detection circuit 4 of more than setting electric current, repeat said process, thus, between the two ends of smoothing capacitor C3, voltage becomes constant voltage.
In addition, although turn off the light when light-emitting diode 3 can disconnect in the transistor Tr 2 of current blocking circuit 16, but due to this light-off, the transistor Tr 1 of this bypass circuit 5 by disconnection and the transistor Tr 2 of this current blocking circuit 16 by conducting, therefore light-emitting diode 3 is lit a lamp immediately, though range estimation it will be appreciated that light-emitting diode 3, have flicker but still lighting a lamp.
As described above, when overcurrent is flowed through the 1st resistance R 1 of current detection circuit 3, the conducting of the transistor Tr 1 by bypass circuit 5, the disconnection of the transistor Tr 2 of this current blocking circuit 16, light-emitting diode 3 is no longer connected between the two ends of smoothing capacitor C3 and no longer includes the overcurrent light-emitting diode 3 of flowing through, and when transistor Tr 1 conducting of bypass circuit 5, the 2nd resistance R 2 is connected between the two ends of smoothing capacitor C3, between the two ends of smoothing capacitor C3, the overvoltage of voltage is discharged by the 2nd resistance R 2, therefore can suppress the overcurrent light-emitting diode 3 of flowing through, thereby can prevent the destruction of the light-emitting diode 3 that causes because of overcurrent or short life etc.
[example 3]
Fig. 4 means the approximate three-dimensional map of the LED ligthing paraphernalia of example 3 of the present invention.In addition, for the part identical with Fig. 2, also description thereof is omitted to mark identical symbol.
And luminous element 20 is positioned at the mode of the opening 21a side of cell body 21 with light-emitting diode 3, by not shown screw etc., install.
Lid 22 for example possess by propylene (acryl) resin, formed, as the rectangular light-passing board 23 of light-transmitting member.And described lid 22 to be to stop up the mode of the opening 21a of cell body 21, by screw 24,24 and be installed on apparatus body 18 via cell body 21.Luminous element 20 is covered by light-passing board 23.
And the inside of apparatus body 18 is setting not shown LED ignition device 15.Each lead-out terminal 7a1 of LED ignition device 15,7b1,7a2,7b2 are connected in luminous element 20 by connector 8,8 and not shown wire, and light-emitting diode 3 are connected.
When LED ignition device 15 is connected to the alternating voltage of commercial ac power source Vs, light-emitting diode 3 is lit a lamp, and from light-emitting diode 3, radiates for example white light of visible ray.The light-passing board 23 that this radiating light sees through cell body 21 throws light on to being positioned at the floor side of the lower side of apparatus body 18.
[industry is utilized possibility]
The present invention can be used in LED lamp (1amp) or the LED ligthing paraphernalia using light-emitting diode as light source.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be not depart from technical solution of the present invention content, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (3)
1. a LED ignition device, is characterized in that comprising:
DC power supply circuit, has smoothing capacitor;
Light-emitting diode, is connected between the two ends of described smoothing capacitor;
Current detection circuit, has the 1st resistance, detects the electric current of the described light-emitting diode of flowing through; And
Bypass circuit, the series circuit with the 2nd resistance and the 1st switching device, described series circuit is connected between the two ends of described smoothing capacitor and between the two ends of described light-emitting diode, during electric current below described current detection circuit detects the maximum permissible current of the described light-emitting diode of flowing through and more than setting, control described the 1st switching device and become conducting.
2. LED ignition device according to claim 1, is characterized in that comprising:
Current blocking circuit, than the more close described LED side of described current detection circuit, have the 2nd switching device being connected in series with described light-emitting diode, the conducting disconnection of described the 2nd switching device is that the voltage by producing between the conducting disconnection of described the 1st switching device of described bypass circuit the two ends corresponding to the 2nd resistance is controlled.
3. a LED ligthing paraphernalia, is characterized in that comprising:
LED ignition device according to claim 1 and 2; And
Apparatus body, is setting described LED ignition device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010083037A JP5447969B2 (en) | 2010-03-31 | 2010-03-31 | LED lighting device and LED lighting apparatus |
| JP2010-083037 | 2010-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102209414A CN102209414A (en) | 2011-10-05 |
| CN102209414B true CN102209414B (en) | 2014-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110064940.3A Expired - Fee Related CN102209414B (en) | 2010-03-31 | 2011-03-14 | LED lighting device and LED illuminator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5447969B2 (en) |
| CN (1) | CN102209414B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5677192B2 (en) * | 2011-05-18 | 2015-02-25 | 三菱電機株式会社 | LED lighting device and LED lighting apparatus |
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| JP6273894B2 (en) * | 2014-02-24 | 2018-02-07 | 岩崎電気株式会社 | LED lighting device and LED lighting device |
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| CN101252797A (en) * | 2007-02-22 | 2008-08-27 | 株式会社小糸制作所 | Light emitting apparatus |
| JP2010055824A (en) * | 2008-08-26 | 2010-03-11 | Panasonic Electric Works Co Ltd | Led driving device, lighting system, and luminaire |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5447969B2 (en) | 2014-03-19 |
| CN102209414A (en) | 2011-10-05 |
| JP2011216316A (en) | 2011-10-27 |
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