CN110392471A - One kind is from glittering LED lamp and its control circuit - Google Patents
One kind is from glittering LED lamp and its control circuit Download PDFInfo
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- CN110392471A CN110392471A CN201910753556.0A CN201910753556A CN110392471A CN 110392471 A CN110392471 A CN 110392471A CN 201910753556 A CN201910753556 A CN 201910753556A CN 110392471 A CN110392471 A CN 110392471A
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- 239000011324 bead Substances 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims description 12
- 230000004397 blinking Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- 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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention provides one kind to realize that LED is always on and flashes double working modes for improving the use scope of LED from glittering LED lamp and its control circuit.It include LED lamp bead and LED control circuit from glittering LED lamp, the output end of H bridge direct current reversing circuit is connect with driving chip, it is that control chip controls end can export the forward signal for making H bridge direct current reversing circuit forward conduction and the reverse signal for making H bridge direct current reversing circuit reverse-conducting can be exported, output services electric current when forward signal controls H bridge direct current reversing circuit forward conduction, control terminal alternately exports forward signal and reverse signal, and reverse signal exports the pulse current opposite with operating current when controlling the H bridge direct current reversing circuit reverse-conducting, the current value of pulse current is less than the current value of the operating current.Control mode in this way, the LED that can only operate in blinking mode also can be carried out work and be always on mode, improve this from the use scope for flashing LED.
Description
Technical field
The invention belongs to technical field of lamps, are related to a kind of control circuit from glittering LED lamp and for controlling LED.
Background technique
LED is a kind of LED lighting device, and multiple LED lamp beads are connected by mode in series or in parallel
LED light string is formed, LED light string is widely used for the light decoration of decoration or building at present.
Existing LED light string is always on and flashes two kinds of operating modes.Wherein, the drive of the LED light string of blinking mode
Flowing mode substantially there are two types of: first is that synchronous flashing mode, i.e., increase a flashing circuit between lamp string and DC power supply, pass through
Flashing circuit controls the flashing of lamp string, and flashing circuit is a kind of switching circuit for capableing of quick-speed turning on-off, this flashing mode is
All lamp string synchronous flashing modes；Another asynchronous flashing mode, " a kind of flashing of LED light string as disclosed in Chinese patent
Application No. is 201610957108.9, including multiple groups LED light string and an at least driving chip, multiple groups for control method and system "
LED light string is connect with driving chip, and the flashing controlling method is the following steps are included: be stored in advance plurality of display modes；To driving
Display sequence is arranged in chip；In conjunction with display sequence, show that every group of LED light string according to the display pattern corresponding to it
Show.It from there through every group of LED light string combination display sequence, and is sequentially flashed according to display pattern, realizes multiple groups LED light
The asynchronous flicker effects such as crossfire water dodges, movement is dodged or dodges at random.
No matter the operating mode or blinking mode that are always on, be all controlled based on LED light string, although
Asynchronous flash pattern devises multiple display control modes, but is all that flashing control is carried out based on LED light string, and there are one
Fixed limitation.
Therefore it has been proposed that being controlled based on single led, i.e. a driving chip is integrated in a LED, by leading
Controller controlled by way of addressing it is single led flashed, asynchronous flashing control mode is realized with larger degree.But
It is that this single led driving chip can only be designed to a kind of control mode, that is, is always on or flash pattern, when single led
Driving chip be flash pattern when (be named as from glittering LED lamp pearl), it is this cannot in the way of existing from glittering LED lamp pearl
Realization is always on mode, is not able to satisfy and is always on and flashes two kinds of operating mode requirements, limits the range used.
Summary of the invention
There is the above problem in view of the prior art in the present invention, propose it is a kind of from glittering LED lamp and LED control circuit,
The technical issues of it is solved is how to improve the use scope of LED, realizes that LED is always on and flashes double working modes.
The present invention is realized by following technical proposal:
From glittering LED lamp, including LED lamp bead and LED control circuit, the LED lamp bead includes LED and can control one kind
For LED operation in the driving chip of flash pattern, the LED control circuit includes control chip and H bridge direct current reversing circuit, H
The output end of bridge direct current reversing circuit is connect with driving chip, and the control chip has and H bridge direct current reversing circuit connection
Control terminal, it is that the control terminal can export the forward signal for making H bridge direct current reversing circuit forward conduction and can export
Make the reverse signal of H bridge direct current reversing circuit reverse-conducting, the forward signal controls the positive guide of the H bridge direct current reversing circuit
Output services electric current when logical, which is characterized in that the control terminal alternately output forward signal and reverse signal, and it is described anti-
The pulse current opposite with operating current, the pulse are exported when controlling the H bridge direct current reversing circuit reverse-conducting to signal
The current value of electric current is less than the current value of the operating current.
This is as follows from the course of work of glittering LED lamp: control chip output forward signal keeps H bridge direct current reversing circuit positive
Conducting, it is electric that the output end output forward dc electricity of H bridge direct current reversing circuit obtains driving chip, and driving chip makes LED operation exist
Flash pattern, keeps H bridge direct current reversing circuit forward conduction, and LED is just constantly in flash pattern.When need LED operation normal
When bright mode, the control terminal exports forward signal and reverse signal in mono- scintillation time section of LED, dodges in a LED
The lighting time section output forward signal in bright stage makes H bridge direct current reversing circuit forward conduction, and LED is lighted, then in the flashing
The fall time section output reverse signal in stage makes H bridge direct current reversing circuit reverse-conducting, the output end of H bridge direct current reversing circuit
It exports in reversed direct current to driving chip, which is the lesser pulse current of electric current, for quickly reducing driving
The electricity of holding capacitor and parasitic capacitance in chip, allows driving chip fast break, that is, shortens putting out for flashing stage
It goes out the period, above-mentioned process is then repeated within next flashing stage, since reverse pulse current accelerates driving chip
Power-off time, the time that LED extinguishes is small to be flashed to visually being difficult to perceive LED, can make this LED so on circulate
Holding is always on state.Control mode in this way, the LED that can only operate in blinking mode also can be carried out work normal
Bright mode improves this from the use scope for flashing LED.
Above-mentioned from glittering LED lamp, the driving chip has the positive pin of power supply, grounding pin and can export height
Low level be used for export low and high level control LED light on and off control pin, LED be connected to the positive pin of power supply and control pin it
Between, the positive pin of the power supply, grounding pin are connect with the output end of the H bridge direct current reversing circuit.Pass through the defeated of driving chip
Out the low and high level of pin controls the light on and off of LED, cut-offs circuit by programming or being directly integrated in driving chip and controls
The low and high level of output pin processed.
Above-mentioned from glittering LED lamp, it is connected in the backward channel of the H bridge direct current reversing circuit anti-to limiting
The current-limiting resistance of pulse current magnitude into access is connected with positive tune in the forward path of the H bridge direct current reversing circuit
Economize on electricity resistance, the positive resistance value for adjusting resistance are less than the resistance value of current-limiting resistance.It can make pulse current by current-limiting resistance
It controls in suitable range, reduces pulse current and driving chip is adversely affected.
Above-mentioned from glittering LED lamp, the LED lamp bead has multiple, forms lamp string in parallel or in series.
Above-mentioned from glittering LED lamp, the reverse signal output time is less than 10ms.Time is smaller, is always on mould
The effect of formula is better.
A kind of LED control circuit, including control chip and H bridge direct current reversing circuit, the control chip have and H bridge
The control terminal of direct current reversing circuit connection, the control terminal can export the forward direction for making H bridge direct current reversing circuit forward conduction
Signal controls the H bridge direct current reversing with that can export the reverse signal for making H bridge direct current reversing circuit reverse-conducting, forward signal
Output services electric current when circuit forward conduction, which is characterized in that the control terminal alternately exports forward signal and reverse signal,
And the reverse signal when controlling the H bridge direct current reversing circuit reverse-conducting output pulse opposite with operating current it is electric
Stream, the current value of the pulse current are less than the current value of the operating current.
For this from glittering LED lamp pearl, it can be realized using above-mentioned LED control circuit and be always on and flash two kinds of work
Mode.
In above-mentioned LED control circuit, connect between the backward channel and control chip of the H bridge direct current reversing circuit
It is connected to the current-limiting resistance to pulse current magnitude in limitation backward channel, the current-limiting resistance is 10K Ω -1000K Ω.
In above-mentioned LED control circuit, connect between the forward path and control chip of the H bridge direct current reversing circuit
It is connected to positive adjusting resistance, the positive resistance value for adjusting resistance is less than the resistance value of current-limiting resistance.
In above-mentioned LED control circuit, the reverse signal output time is less than 10ms.
Compared with prior art, this has the advantage that from glittering LED lamp
1, the present invention accelerates the power-off time of driving chip using reverse pulse current, and the time that LED extinguishes is small to meat
Eye, which is difficult to perceive LED, to be flashed, in this way control mode, is made also to be able to achieve under the mode of being always on from flashing LED, be improved
It is this from the use scope for flashing LED.
2, from the driving circuit from the LED of this case with the lamp string that flashing LED is formed, the two kinds of works realizing flashing and being always on
Operation mode, have longer service life, and compared to be always on LED composition lamp string and control circuit, reduce from flash
The application cost of LED light string.
Detailed description of the invention
Fig. 1 is in embodiment one from the structural schematic diagram of glittering LED lamp pearl.
Fig. 2 is in embodiment one from the schematic diagram of the control circuit of flashing LED.
Fig. 3 is the state diagram of the low and high level of Fig. 2 output end connection LED.
Fig. 4 is that the forward signal and reverse signal schematic diagram that chip issues are controlled in Fig. 2, to realize from glittering LED lamp pearl
It is always on.
In figure, 1, LED lamp bead；2, driving chip；21, the positive pin of power supply；22, grounding lead；23, pin is controlled；3, it controls
Chip；L1, the first control foot；L2, the second control foot；4, H bridge direct current reversing circuit；41, the first output end；42, the second output
End；Switching tube Q1, Q2, Q3, Q4；R1, positive adjusting resistance；R2, current-limiting resistance；R3, R4 transfer resistance.
Specific embodiment
The following is specific embodiments of the present invention, and in conjunction with attached drawing, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
Embodiment one:
As shown in Figure 1 from glittering LED lamp pearl 1, including LED and driving chip 2, driving chip 2 there is power supply just to draw
The anode of foot 21, grounding pin 22 and the control pin 23 that can export low and high level, LED is connect with the positive pin 21 of power supply, LED's
Cathode is connect with control pin 23, and the positive pin 21 of power supply and grounding pin 22 extend to outside 1 Lamp housing of LED lamp bead, as LED light
The external positive connecting pin and negative connecting pin of pearl 1.Programmable memory, the central processing of driving chip 2 are equipped in driving chip 2
The output low and high level that device allows the control pin 23 of driving chip 2 to be spaced according to the cyclic program in memory, when control pin 23
When exporting low level, LED channel simultaneously shines, and when controlling the output high level of pin 23, LED ends and extinguishes, and so on, In
Driving chip 2 can be such that LED ceaselessly flashes after obtaining, the LED lamp bead 1 of this structure, also for from glittering LED lamp pearl 1.
As shown in Figures 2 and 3, Fig. 2 is the control circuit of LED, including control chip 3 and H bridge direct current reversing circuit 4.Control
The control terminal 31 of coremaking piece 3 includes the first control foot L1 and the second control foot L2 that can generate low and high level, when the first control
Foot L1 is low level state and the second control foot L2 when being high level state, i.e., control chip 3 passes through the first control foot L1 and the
Two control foot L2 export forward signal to H bridge direct current reversing circuit 4；When the first control foot L1 is high level state and the second control
When foot L2 is low level state, i.e., control chip 3 controls foot L2 to H bridge direct current reversing circuit by the first control foot L1 and second
4 output reverse signals.The low and high level of first control foot L1 and the second control foot L2 are set by the program in control chip 3
It is fixed.
H bridge direct current reversing circuit 4 includes the direct current reversing electricity that four switching tubes Q1, Q2, Q3, Q4 and two output ends are constituted
Road, wherein the output end of H bridge direct current reversing circuit 4 is the first output end 41 and second output terminal 42, and switching tube Q1 and Q4 are constituted
Forward path, the collector of switching tube Q1 and the first output end 41 connect, the collector of switching tube Q4 and second output terminal 42
The collector of connection, switching tube Q1 is connect by transfer resistance R3 with the base stage of switching tube Q2, the emitter and electricity of switching tube Q1
The connection of source anode, the emitter of switching tube Q4 and ground connection.Switching tube Q2 and Q3 constitute backward channel, and the collector of switching tube Q2 is logical
It crosses transfer resistance R4 to connect with the base stage of switching tube Q2, the emitter of switching tube Q2 is connect with positive pole, the hair of switching tube Q3
Emitter-base bandgap grading and ground connection, the collector of switching tube Q2 connect second output terminal 42, and the collector of switching tube Q3 connects the first output end 41,
First control pin 23 of control chip 3 is connect by the positive resistance R1 that adjusts with the base stage of switching tube Q1, and the second of coremaking piece
Control pin 23 is connect by current-limiting resistance R2 with the base stage of switching tube Q2.Current-limiting resistance R2 is 10K Ω -1000K Ω, for limiting
Backward channel size of current processed, reverse current is low current when backward channel is connected, and the resistance value that forward direction adjusts resistance R1 is less than limit
The resistance value of leakage resistance R2, general difference are 150-250 times, and forward current is that LED lamp bead 1 can be driven to shine when forward path is connected
Operating current.
It can make 4 forward conduction of H bridge direct current reversing circuit when the control terminal for controlling chip 3 exports forward signal, work as control
The control terminal of chip 3 can make 4 reverse-conducting of H bridge direct current reversing circuit when exporting reverse signal.Specifically, when control chip 3
To export forward signal state, the first control foot L1 is low level state, switching tube Q1 and Q4 conducting, the output of the first output end 41
High level, the second control foot L2 are high level state, switching tube Q2 and Q3 cut-off, the output low level of second output terminal 42；With
The positive pin 21 of power supply of the driving chip 2 of one output end 41 connection obtains electric, the start-up operation of driving chip 2, if control chip 3 one
Straight output forward signal, then driving chip 2 works always, and LED operation is always in blinking mode.When control chip 3 is defeated
Reverse signal state out, the first control foot L1 is high level state, and switching tube Q1 and Q4 end, and the first output end 41 exports low electricity
Flat, the second control foot L2 is low level state, and switching tube Q2 and Q3 conducting, second output terminal 42 exports high level, in this way, driving
The negative pin of the power supply of chip 2 connects the first output end 41 of high level, and the positive pin 21 of the power supply of driving chip 2 connects low level second
Output end 42 allows driving so that the electricity of the holding capacitor inside driving chip 2 and the electricity of parasitic capacitance quickly consume
2 fast break of chip.Due to current-limiting resistance R2, reverse current is smaller, will not be to impacting inside driving chip 2.
As shown in figure 4, when control terminal alternately exports forward signal and reverse signal, and the reverse signal control H bridge is straight
The reverse current opposite with operating current is exported when flowing 4 reverse-conducting of commutating circuit, and reverse current is served only for rapidly depleting electricity
Hold the electricity of C, so that the reverse current duration is very short, forms reverse pulse current.Specifically, in mono- flashing of LED
Between one forward signal of output and a reverse signal in section t, a LED flashing stage t the output of lighting time section t1 just
Make 4 forward conduction of H bridge direct current reversing circuit to signal, LED is lighted, then anti-in the fall time t2 section output in the flashing stage
Make 4 reverse-conducting of H bridge direct current reversing circuit to signal, the output end of H bridge direct current reversing circuit 4 exports reverse pulse current, allows
2 fast break of driving chip shortens the fall time section t2 in a flashing stage, then repeats in next flashing stage t
Above-mentioned process, since reverse pulse current accelerates the power-off time of driving chip 2, the time that LED extinguishes is small difficult to naked eyes
It is being flashed with perceiving LED, the fall time t2 of LED is generally scheduled on 10 milliseconds hereinafter, can make so on circulate this
LED holding is always on state.
LED lamp bead 1 can individually be controlled for one in this example, can also be formed by multiple LED lamp beads 1 parallel connection or
Concatenated lamp string.
Specific embodiment described herein is only to give an example to the present invention.The technical field of the invention
Technical staff can make various modifications or additions to the described embodiments or be substituted in a similar manner, but
Without departing from the spirit of the invention or going beyond the scope defined by the appended claims.
Claims (9)
1. one kind is from glittering LED lamp, including LED lamp bead (1) and LED control circuit, the LED lamp bead (1) includes LED and energy
LED operation is controlled in the driving chip (2) of flash pattern, the LED control circuit includes control chip (3) and H bridge direct current
The output end of commutating circuit (4), H bridge direct current reversing circuit (4) is connect with driving chip (2), and the control chip (3) has
The control terminal (31) connecting with H bridge direct current reversing circuit (4), the control terminal (31), which can export, keeps H bridge direct current reversing electric
The forward signal of road (4) forward conduction and the reverse signal for making H bridge direct current reversing circuit (4) reverse-conducting, institute can be exported
State output services electric current when forward signal controls H bridge direct current reversing circuit (4) forward conduction, which is characterized in that described
Control terminal (31) alternately output forward signal and reverse signal, and the reverse signal control H bridge direct current reversing circuit
(4) pulse current opposite with operating current is exported when reverse-conducting, the current value of the pulse current is less than the work electricity
The current value of stream.
2. according to claim 1 from glittering LED lamp, which is characterized in that there is the driving chip (2) power supply just to draw
Foot (21), grounding pin (22) and can export low and high level for export low and high level control LED light on and off control pin (23),
LED is connected between the positive pin of power supply (21) and control pin (23), the positive pin of power supply (21), grounding pin (22) and institute
State the output end connection of H bridge direct current reversing circuit (4).
3. according to claim 1 or 2 from glittering LED lamp, which is characterized in that the H bridge direct current reversing circuit (4)
The current-limiting resistance (R2) to pulse current magnitude in limitation backward channel, institute are connected between backward channel and control chip (3)
Positive adjusting resistance (R1) is connected between the forward path and control chip (3) of the H bridge direct current reversing circuit (4) stated, it is described
The positive resistance value for adjusting resistance (R1) be less than the resistance value of current-limiting resistance (R2), the current-limiting resistance (R2) is 10K Ω-
1000KΩ。
4. according to claim 3 from glittering LED lamp, which is characterized in that the reverse signal output time is less than
10ms。
5. according to claim 4 from glittering LED lamp, which is characterized in that the LED lamp bead (1) have it is multiple, formed simultaneously
Connection or concatenated lamp string.
6. a kind of LED control circuit, including control chip (3) and H bridge direct current reversing circuit (4), control chip (3) tool
There is the control terminal (31) connecting with H bridge direct current reversing circuit (4), the control terminal (31), which can export, makes H bridge direct current reversing
The forward signal of circuit (4) forward conduction and the reverse signal for making H bridge direct current reversing circuit (4) reverse-conducting can be exported, just
Output services electric current when controlling H bridge direct current reversing circuit (4) forward conduction to signal, which is characterized in that the control
(31) alternately output forward signal and reverse signal is held, and the reverse signal controls the H bridge direct current reversing circuit (4) instead
To the pulse current opposite with operating current is exported when conducting, the current value of the pulse current is less than the electricity of the operating current
Flow valuve.
7. LED control circuit according to claim 6, which is characterized in that the H bridge direct current reversing circuit (4) it is anti-
It is described to the current-limiting resistance (R2) being connected between access and control chip (3) to pulse current magnitude in limitation backward channel
Current-limiting resistance (R2) be 10K Ω -1000K Ω.
8. LED control circuit according to claim 7, which is characterized in that the H bridge direct current reversing circuit (4) is just
To positive adjusting resistance (R1) is connected between access and control chip (3), the positive resistance value for adjusting resistance (R1) is small
In the resistance value of current-limiting resistance (R2).
9. LED control circuit according to claim 1, which is characterized in that the reverse signal output time is less than
10ms。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753556.0A CN110392471A (en) | 2019-08-15 | 2019-08-15 | One kind is from glittering LED lamp and its control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753556.0A CN110392471A (en) | 2019-08-15 | 2019-08-15 | One kind is from glittering LED lamp and its control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110392471A true CN110392471A (en) | 2019-10-29 |
Family
ID=68288896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910753556.0A Pending CN110392471A (en) | 2019-08-15 | 2019-08-15 | One kind is from glittering LED lamp and its control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN110392471A (en) |
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|---|---|---|---|---|
| WO2008101398A1 (en) * | 2007-02-12 | 2008-08-28 | Chiliang Shao | A single-lamp control led light string |
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| CN203349030U (en) * | 2013-05-13 | 2013-12-18 | 杭州璞莱科技有限公司 | Wire-saving LED lamp string, wire-saving LED lamp string cluster and output circuit of wire-saving LED lamp string cluster |
| CN103561507A (en) * | 2013-09-30 | 2014-02-05 | 常州市巨泰电子有限公司 | LED lamp string single way band control circuit and control method |
| CN105682296A (en) * | 2016-03-21 | 2016-06-15 | 江门市蓬江区广达电器有限公司 | Forward-reverse connection type LED lamp string |
| DE202017100363U1 (en) * | 2017-01-24 | 2017-02-21 | Changzhou Jutai Electronic Co., Ltd. | LED control unit with Bluetooth |
| CN207266332U (en) * | 2017-07-12 | 2018-04-20 | 无锡迅驰电子科技有限公司 | The intelligent controller of LED Christmas lamps |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008101398A1 (en) * | 2007-02-12 | 2008-08-28 | Chiliang Shao | A single-lamp control led light string |
| JP2010170846A (en) * | 2009-01-22 | 2010-08-05 | Panasonic Electric Works Co Ltd | Power supply and luminaire using the same |
| CN101704352A (en) * | 2009-11-16 | 2010-05-12 | 杭州电子科技大学 | Near light and far light control circuit of automotive headlamp |
| CN203349030U (en) * | 2013-05-13 | 2013-12-18 | 杭州璞莱科技有限公司 | Wire-saving LED lamp string, wire-saving LED lamp string cluster and output circuit of wire-saving LED lamp string cluster |
| CN103561507A (en) * | 2013-09-30 | 2014-02-05 | 常州市巨泰电子有限公司 | LED lamp string single way band control circuit and control method |
| CN105682296A (en) * | 2016-03-21 | 2016-06-15 | 江门市蓬江区广达电器有限公司 | Forward-reverse connection type LED lamp string |
| DE202017100363U1 (en) * | 2017-01-24 | 2017-02-21 | Changzhou Jutai Electronic Co., Ltd. | LED control unit with Bluetooth |
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