CN201928493U - Constant current led lamp - Google Patents
Constant current led lamp Download PDFInfo
- Publication number
- CN201928493U CN201928493U CN2011200068326U CN201120006832U CN201928493U CN 201928493 U CN201928493 U CN 201928493U CN 2011200068326 U CN2011200068326 U CN 2011200068326U CN 201120006832 U CN201120006832 U CN 201120006832U CN 201928493 U CN201928493 U CN 201928493U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- electric crystal
- emitting diode
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 21
- 239000013078 crystal Substances 0.000 claims description 48
- 238000009413 insulation Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 6
- 230000001131 transforming effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008034 disappearance Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The utility model discloses a constant current LED lamp, which is provided with a driving device for driving at least two serially-connected LEDs or packaged polycrystal serially-connected LEDs. The driving device comprises a rectifying circuit, a filtering circuit, a voltage stabilizing circuit and a constant current circuit, wherein the rectifying circuit is used for receiving an alternating current power supply and converting the alternating current power supply into a direct current power supply; the filtering circuit is connected with the rectifying current; and if an input power supply is the direct current power supply, the rectifying circuit and the filtering current are omitted. By using the driving device disclosed by the utility model, the structure of the circuit is greatly simplified and the series connection voltage of each LED is ensured to approach to input voltage, thus each LED is driven by fully utilizing the input power supply, fully utilizing the power supply and reducing the power loss.
Description
Technical field
The relevant a kind of electric current LED light fixture of deciding of the utility model refers to that especially the circuit framework of its drive unit is significantly simplified, can reach to make full use of power, and reduce power loss and do not have an electromagnetic interference decide electric current LED light fixture.
Background technology
Because natural energy source is petered out, new alternative energy source is under the situation of still failing on development rate and the service efficiency to satisfy the demand immediately, and energy savings is a feasible and measures necessary of present stage.On the concrete countermeasure of energy savings, what stand in the breach is the self-criticism again of various electric equipment power consumption efficiencies, with indispensable illuminating equipment in modern's life is example, the tradition osram lamp only becomes luminous energy with 5% power conversions, all the other electric power of 95% then convert heat energy to, not only power consumption efficiency is extremely low for it, and the heat energy that produces causes other need for electricity (for example air-conditioning, heat radiation) usually.Because the conventional lamp inefficiency, multiple with the prosperity of semiconductor industry and the quick innovation of technology, the light-emitting diode of long working life, low power consumption gets most of the attention, and is used on lighting use in large quantities.
As described in preceding taking off, light-emitting diode people's advantage of speaking approvingly of the most is long-life, low power consumption and low used heat etc., the main cause of this that is industry active development light emitting diode lighting equipment; Because light-emitting diode needs DC power supply to drive, therefore work as light-emitting diode and be applied to receive AC power, when for example being applied to civil power, then need a LED driving circuit that AC power is converted to DC power supply, with the driven for emitting lights led lighting.
Habit has LED driving circuit, as shown in Figure 1, is provided with resistance R between the series circuit of light-emitting diode 12, consumes unnecessary voltage by resistance R, makes input voltage meet the series voltage of light-emitting diode 12; Yet this kind circuit energy conversion efficiency is not good.
Also have second kind of habit that LED driving circuit is arranged, as shown in Figure 2, this LED driving circuit 1 is connected with at least one light-emitting diode 12, and receives an AC power VAC.This LED driving circuit 1 mainly comprises a bridge rectifier 10, suppress electromagnetic interference circuit 11, filter circuit 16, high frequency commutation circuit 13, transforming circuit 14 and feedback circuit 15, wherein bridge rectifier 10 is rectified into AC power VAC the DC power supply of one pulsation, and filter circuit 16 can dwindle the gap of this DC power supply voltage amplitude, DC power supply changes supply frequency through high frequency commutation circuit 13, transforming circuit 14 converts high frequency electric source to low-voltage direct and offers light-emitting diode 12, and feedback circuit 15 can be detected the size of light-emitting diode 12 total load voltages, adjusts the size of transforming circuit 14 output voltages.
Though but driven for emitting lights diode 12 is luminous really for second kind of known LED driving circuit 1, yet because whole drive circuit structure is comparatively complicated, cause the circuit volume comparatively huge, circuit cost is comparatively expensive, therefore uses the LED light fixture production cost of this drive circuit higher relatively.And in order to solve the problem of space and cost, normal cancellation suppresses electromagnetic interference circuit 11 or reduces component specification, makes that energy conversion efficiency is not good and produces disappearance such as electromagnetic interference.
The third habit has LED driving circuit, as shown in Figure 3, this LED driving circuit 1 is connected with at least one light-emitting diode 11, and receive an AC power VAC, this LED driving circuit 1 mainly comprises a capacitor C and a bridge rectifier 10, can get a capacitive reactance when wherein capacitor C is used in AC power, capacitive reactance was low more when big more or frequency was high more when capacitance, the size of capacitive reactance can influence the size of AC power pressure drop on capacitor C, utilize this characteristic the input power supply can be depressurized to the light-emitting diode required voltage, bridge rectifier 10 provides light-emitting diode 12 electric currents and luminous with the DC power supply that AC power is rectified into a pulsation.
Though but driven for emitting lights diode 12 is luminous really for known LED driving circuit 1, because what general capacitor C was used is high withstand voltage plastics electric capacity, this electric capacity makes the big and capacitance of volume be difficult to do height because of material constitutes, when using in low power load and no problem.Yet when desiring to tend to act, promote capacitance, usually to use the mode of several plastics electric capacity parallel connections to promote capacitance, but this kind mode can cause the too huge and cost of circuit volume significantly to rise because of needs reduce capacitive reactance than high power load.
The utility model content
The technical problem that the utility model solved is promptly providing a kind of electric current LED light fixture of deciding, and refers to that especially its drive unit can make circuit framework significantly simplify, and can reach to make full use of power, and reduce the light emitting diode drive device of power loss.
The technical solution of the utility model is: a kind ofly decide electric current LED light fixture, should decide electric current LED light fixture and be provided with a drive unit, this drive unit is in order to drive at least two light-emitting diodes that are connected in series or to be encapsulated as the light-emitting diode that polycrystalline is connected, this drive unit includes: a constant-current circuit, connect with this light-emitting diode, this constant-current circuit is provided with the vague and general type metal-oxide-semifield-effect electric crystal of a n type, to light-emitting diode, and can keep this drive current in a fixed value with the restriction electric current.
A kind ofly decide electric current LED light fixture, should decide electric current LED light fixture and be provided with a drive unit, this drive unit is in order to drive at least two light-emitting diodes that are connected in series or to be encapsulated as the light-emitting diode that polycrystalline is connected, it includes: a voltage stabilizing circuit, this voltage stabilizing circuit is parallel to the DC power supply two ends, receive a direct current power supply, in order to produce a constant voltage according to this DC power supply; An and constant-current circuit, be connected with this voltage stabilizing circuit, and this constant-current circuit is connected with this light-emitting diode, this constant-current circuit is provided with an electric crystal and one second resistance of connecting mutually, to light-emitting diode, and can keep this drive current with the restriction electric current in a fixed value.
Wherein, this electric crystal is metal-oxide-semifield-effect electric crystal (MOSFET), and this metal-oxide-semifield-effect electric crystal is vague and general type metal-oxide-semifield-effect electric crystal of n type or n type enhancement mode metal-oxide-semifield-effect electric crystal; Perhaps, this electric crystal is an insulation lock bipolar transistor; Also or, this electric crystal is that bipolarity connects face electric crystal (BJT).
This electric crystal is the certain electric current assembly of series connection further, and this electric crystal is that bipolarity connects face electric crystal (BJT) or is an effect electric crystal (FET).
This second resistance is variable resistor.
This drive unit further is provided with a rectification circuit and a filter circuit, this rectification circuit is in order to receive an AC power, and convert this AC power to DC power supply, this filter circuit is connected with this rectification circuit, can dwindle the gap of this DC power supply voltage amplitude, and DC power supply is sent to this voltage stabilizing circuit and this light-emitting diode respectively.
This drive unit further is provided with power factor correction circuit, and this power factor correction circuit and this filter circuit are connected in series, and this power factor correction circuit is the 3rd resistance.
This drive unit further is provided with power factor correction circuit, and this power factor correction circuit and this filter circuit are connected in series, and this power factor correction circuit is the 3rd resistance and a diode parallel with one another.
The beneficial effects of the utility model are: the drive unit of the utility model light fixture is in order to drive at least two light-emitting diodes that are connected in series or to be encapsulated as the light-emitting diode that polycrystalline is connected, this drive unit includes: a rectification circuit, a filter circuit, a voltage stabilizing circuit and a constant-current circuit, this rectification circuit is in order to receive an AC power, and convert this AC power to DC power supply, this filter circuit is connected with this rectification circuit; If the input power supply is the setting that DC power supply does not then need rectification circuit and filter circuit.
Drive unit of the present utility model is not only significantly simplified circuit framework, and the series voltage that can make each light-emitting diode is near input voltage, drive each light-emitting diode to make full use of the input power supply, reach and make full use of power, reduce power loss and do not have the interference of electromagnetism.
Description of drawings
Fig. 1,2,3 is for commonly using the electrical block diagram of LED driving circuit.
Fig. 4 is the electrical block diagram of drive unit first embodiment in the utility model.
Fig. 5 is the electrical block diagram of drive unit second embodiment in the utility model.
Fig. 6 is the electrical block diagram of drive unit the 3rd embodiment in the utility model.
Fig. 7 is the electrical block diagram of drive unit the 4th embodiment in the utility model.
Fig. 8 is the electrical block diagram of drive unit the 5th embodiment in the utility model.
Fig. 9 is the electrical block diagram of drive unit the 6th embodiment in the utility model.
Figure 10 is the electrical block diagram of drive unit the 7th embodiment in the utility model.
Figure 11 is the electrical block diagram of drive unit the 8th embodiment in the utility model.
[figure number explanation]:Capacitor C; Resistance R; AC power VAC; Drive circuit 1; Bridge rectifier 10; Suppress electromagnetic interference circuit 11; Light-emitting diode 12; High frequency commutation circuit 13; Transforming circuit 14; Feedback circuit 15; Filter circuit 16; Voltage stabilizing circuit 21; First resistance 211; Pressurizer 212; Constant-current circuit 22; Bipolarity connects face electric crystal 221; Second resistance 222; Decide electric current assembly 223; Electric crystal 224; Metal-oxide-semifield-effect electric crystal 225; Insulation lock bipolar transistor 226; The vague and general type metal-oxide-semifield-effect electric crystal 227 of n type; Rectification circuit 23; Filter circuit 24; Power factor correction circuit 25; The 3rd resistance 251; Diode 252; Light-emitting diode 3.
Embodiment
Shown in first embodiment of Fig. 4, drive unit 2 of the present utility model is in order to drive at least two light-emitting diodes that are connected in series 3 or to be encapsulated as the light-emitting diode 3 that polycrystalline is connected, and this drive unit 2 includes: a voltage stabilizing circuit 21 and a constant-current circuit 22; Wherein: this voltage stabilizing circuit 21 is parallel to the two ends of DC power supply, receive a direct current power supply, this voltage stabilizing circuit 21 is provided with first resistance 211 and a pressurizer 212 (can be voltage stabilizing didoe) of connecting mutually, in order to produce a constant voltage according to this DC power supply; And this constant-current circuit 22 is connected with this voltage stabilizing circuit 21, and this constant-current circuit 22 is connected with this light-emitting diode 3, in order to limit drive current to light-emitting diode 3, and can keep this electric current in a fixed value, among the embodiment as shown in the figure, this constant-current circuit 22 can be electric crystal, wherein, this electric crystal can be metal-oxide-semifield-effect electric crystal 225 (MOSFET), for example can be n type enhancement mode metal-oxide-semifield-effect electric crystal or the vague and general type metal-oxide-semifield-effect electric crystal of n type, when this metal-oxide-semifield-effect electric crystal 225 operates in the saturation region, can utilize the characteristic of saturation region, limiting fixed current in the fixing mode of VGS voltage provides to light-emitting diode 3; Certainly, as if this electric crystal is brilliant 227 o'clock of the vague and general type MOSFET electricity of n type, can save the setting of voltage stabilizing circuit, shown in Fig. 5 second embodiment, the difference of vague and general type and enhancement mode is: this vague and general type metal-oxide-semifield-effect electric crystal changes the impurity concentration that is doped to passage in manufacture process, make gate not apply voltage, channel still exists, that is to say that when VGS=0V ID still has electric current to flow through, but driven for emitting lights diode still.
If power supply is provided is that AC power then can further be provided with a rectification circuit 23 and a filter circuit 24, shown in the 3rd embodiment of Fig. 6, this rectification circuit 23 can be bridge rectifier, in order to receive an AC power, and convert this AC power to DC power supply, this filter circuit 24 (can be capacitor) is connected with this rectification circuit 23, can dwindle the gap of this DC power supply voltage amplitude, and DC power supply is sent to this voltage stabilizing circuit 21 and this light-emitting diode 3 respectively.
Shown in the 4th embodiment of Fig. 7, this drive unit 2 includes equally: a voltage stabilizing circuit 21 and a constant-current circuit 22, this constant-current circuit 22 can be insulation lock bipolar transistor 226 (IGBT), because insulation lock bipolar transistor 226 applicable power competiting place effect electric crystals (FET) are big, but drive principle basically is identical, therefore utilizes this point to can be applicable on the powerful light-emitting diode.
Shown in the 5th embodiment of Fig. 8, this drive unit 2 includes equally: a voltage stabilizing circuit 21 and a constant-current circuit 22, this constant-current circuit 22 can connect face electric crystal (BJT) or be an effect electric crystal (FET) for the electric crystal 224[that is connected in series for bipolarity] and certain electric current assembly 223, should decide electric current assembly 223 may command fixed current values provides to light-emitting diode 3, and when alternating voltage is excessive, unnecessary voltage can consume on this electric crystal 224, does not decide electric current assembly 223 and light-emitting diode 3 and can not influence this.
And among above-mentioned first to the 5th embodiment, also can further be in series with one second resistance in this constant-current circuit, and this second resistance can be variable resistor, but can further adjust the brightness of light-emitting diode by this power transformation group, to have dimming function.
Be illustrated in figure 9 as the 6th embodiment of the present utility model, this drive unit 2 includes equally: a voltage stabilizing circuit 21 and a constant-current circuit 22, and this constant-current circuit is provided with an electric crystal and one second resistance 222 of connecting mutually, wherein, this electric crystal can connect face electric crystal (BJT) 221 for bipolarity, this second resistance 222 can be variable resistor, but can further adjust the brightness of light-emitting diode by this power transformation group, to have dimming function.
In addition, also can further be provided with power factor correction circuit in the various embodiments described above to improve power factor (PF), can reach real output and promote, reduce the advantage that loss reduces used heat, is example as Figure 10 with the 3rd embodiment, this power factor correction circuit 25 is connected with this filter circuit 24, and this power factor correction circuit 25 can be the 3rd resistance 251, utilizes the 3rd resistance 251 can increase its charging interval, and it is milder that input current is become by instantaneous large-current; Certainly, this power factor correction circuit 25 can also be the 3rd resistance 251 and diode 252 parallel with one another, as shown in figure 11, can use this diode 252 to be separated out the path that discharges and recharges, so can allow input voltage and input current can level off to same-phase and improve power factor (PF).
The utility model has drive unit to have following advantage compared to habit.
1, constant-current circuit design of the present utility model is applied to drive the light-emitting diode that is connected in series, or be applied to be encapsulated as the light-emitting diode of polycrystalline series connection, the series voltage that can make each light-emitting diode is near input voltage, drive each light-emitting diode to make full use of the input power supply, reach and make full use of power, and reduce power loss.
2, drive unit integrated circuit framework of the present utility model is significantly simplified, and production cost is lower.
3, do not have high frequency switching device, can not produce electromagnetic radiation, so do not have the disappearance of electromagnetic interference.
4, transformer must be set, the integrated circuit structural design is simple, also can significantly dwindle overall volume.
Claims (8)
1. decide electric current LED light fixture for one kind, it is characterized in that, should decide electric current LED light fixture and be provided with a drive unit, this drive unit is in order to drive at least two light-emitting diodes that are connected in series or to be encapsulated as the light-emitting diode that polycrystalline is connected, this drive unit includes: a constant-current circuit, to connect with this light-emitting diode, and this constant-current circuit is provided with the vague and general type metal-oxide-semifield-effect electric crystal of a n type, to light-emitting diode, and can keep this drive current with the restriction electric current in a fixed value.
2. decide electric current LED light fixture for one kind, it is characterized in that, this is decided electric current LED light fixture and is provided with a drive unit, and this drive unit is in order to drive at least two light-emitting diodes that are connected in series or to be encapsulated as the light-emitting diode that polycrystalline is connected, and it includes:
One voltage stabilizing circuit, this voltage stabilizing circuit is parallel to the DC power supply two ends, receives a direct current power supply, in order to produce a constant voltage according to this DC power supply; And
One constant-current circuit, be connected with this voltage stabilizing circuit, and this constant-current circuit is connected with this light-emitting diode, this constant-current circuit is provided with an electric crystal and one second resistance of connecting mutually, to light-emitting diode, and can keep this drive current with the restriction electric current in a fixed value.
3. as claimed in claim 2ly decide electric current LED light fixture, it is characterized in that this electric crystal is metal-oxide-semifield-effect electric crystal (MOSFET), this metal-oxide-semifield-effect electric crystal is vague and general type metal-oxide-semifield-effect electric crystal of n type or n type enhancement mode metal-oxide-semifield-effect electric crystal; Perhaps, this electric crystal is an insulation lock bipolar transistor; Also or, this electric crystal is that bipolarity connects face electric crystal (BJT).
4. as claimed in claim 3ly decide electric current LED light fixture, it is characterized in that this electric crystal is the certain electric current assembly of series connection further, this electric crystal is that bipolarity connects face electric crystal (BJT) or is an effect electric crystal (FET).
5. each describedly decides electric current LED light fixture as claim 2 to 4, it is characterized in that this second resistance is variable resistor.
6. each describedly decides electric current LED light fixture as claim 1 to 4, it is characterized in that, this drive unit further is provided with a rectification circuit and a filter circuit, this rectification circuit is in order to receive an AC power, and convert this AC power to DC power supply, this filter circuit is connected with this rectification circuit, can dwindle the gap of this DC power supply voltage amplitude, and DC power supply is sent to this voltage stabilizing circuit and this light-emitting diode respectively.
7. as claimed in claim 6ly decide electric current LED light fixture, it is characterized in that this drive unit further is provided with power factor correction circuit, this power factor correction circuit and this filter circuit are connected in series, and this power factor correction circuit is the 3rd resistance.
8. as claimed in claim 7ly decide electric current LED light fixture, it is characterized in that this drive unit further is provided with power factor correction circuit, this power factor correction circuit and this filter circuit are connected in series, and this power factor correction circuit is the 3rd resistance and a diode parallel with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200068326U CN201928493U (en) | 2010-11-17 | 2011-01-12 | Constant current led lamp |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020610963.0 | 2010-11-17 | ||
| CN201020610963 | 2010-11-17 | ||
| CN2011200068326U CN201928493U (en) | 2010-11-17 | 2011-01-12 | Constant current led lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928493U true CN201928493U (en) | 2011-08-10 |
Family
ID=44432326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200068326U Expired - Lifetime CN201928493U (en) | 2010-11-17 | 2011-01-12 | Constant current led lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201928493U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427711A (en) * | 2013-09-10 | 2015-03-18 | 沛亨半导体股份有限公司 | LED lighting systems, LED controllers and LED control methods for a string of LEDs |
| CN105935004A (en) * | 2013-11-22 | 2016-09-07 | 微芯片科技公司 | Cascode-type dimming switch using bipolar junction transistor for driving string of light emitting diodes |
| CN108696959A (en) * | 2017-04-10 | 2018-10-23 | 晶元光电股份有限公司 | The driver of light emitting diode |
-
2011
- 2011-01-12 CN CN2011200068326U patent/CN201928493U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427711A (en) * | 2013-09-10 | 2015-03-18 | 沛亨半导体股份有限公司 | LED lighting systems, LED controllers and LED control methods for a string of LEDs |
| CN104427711B (en) * | 2013-09-10 | 2017-01-18 | 沛亨半导体股份有限公司 | LED lighting systems, LED controllers and LED control methods for a string of LEDs |
| CN105935004A (en) * | 2013-11-22 | 2016-09-07 | 微芯片科技公司 | Cascode-type dimming switch using bipolar junction transistor for driving string of light emitting diodes |
| CN105935004B (en) * | 2013-11-22 | 2018-02-06 | 微芯片科技公司 | For driving the cascade type dimmer switch using bipolar junction-type transistor of a string of light emitting diodes |
| CN108696959A (en) * | 2017-04-10 | 2018-10-23 | 晶元光电股份有限公司 | The driver of light emitting diode |
| CN108696959B (en) * | 2017-04-10 | 2022-07-19 | 晶元光电股份有限公司 | Driver of light emitting diode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3167927U (en) | Constant current LED lamp | |
| CN103025018B (en) | Light emitting diode (LED) drive circuit controlled by parallel connection high voltage metal oxide semiconductor (MOS) tube | |
| CN103188845B (en) | The LED light emission device of alternating current Direct driver | |
| CN201180948Y (en) | Energy-saving lamp | |
| CN201274590Y (en) | LED driving apparatus using commercial power | |
| CN101711066A (en) | LED alternating current (AC) directly-powered circuit and power supply method | |
| CN201928493U (en) | Constant current led lamp | |
| CN204191008U (en) | A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power | |
| CN202551459U (en) | LED (Light Emitting Diode) driving power supply module for silicon controlled regulating circuit | |
| CN104378888B (en) | A kind of simple PFC frameworks controllable silicon light modulation LED drive power high | |
| CN103025017B (en) | Light-emitting diode (LED) driving circuit based on parallel switch control | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN102149233A (en) | LED (Light Emitting Device) light source control device | |
| CN101236445A (en) | Power consumption free voltage stabilizing power source circuit | |
| CN103052222A (en) | 220V light-dimmable constant-current drive high-voltage LED (Light Emitting Diode) circuit | |
| EP2375863A2 (en) | External electrical-control lamp with improved structure | |
| CN202587529U (en) | Pulse width modulation (PWM) dimming circuit for high-voltage direct current centralized power supply light emitting diode (LED) constant current source | |
| CN203596952U (en) | Mixed constant current LED lamp | |
| CN206596269U (en) | Dimmable LED drive control circuit | |
| CN201601859U (en) | Non-isolated LED driving circuit | |
| CN103634991A (en) | High-voltage integrated alternating-current LED multistage linear drive device | |
| CN204616144U (en) | A kind of control circuit of LED energy conserving lamp | |
| CN104797054B (en) | LED sectional dimming capacitance-resistance driving powers | |
| CN202634807U (en) | Constant-current LED lighting lamp using current adjustment tube | |
| CN203039947U (en) | High-efficiency LED lamp driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170605 Address after: China Taiwan Taipei County eight meters two Xiang long section of No. 26 -1 Patentee after: Li Yulin Address before: Chinese Taiwan Taoyuan City Dalin prosperous road No. 32 4 floor Co-patentee before: Li Yulin Patentee before: Trend Lighting Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |