CN205830093U - A kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED - Google Patents
A kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED Download PDFInfo
- Publication number
- CN205830093U CN205830093U CN201620641502.7U CN201620641502U CN205830093U CN 205830093 U CN205830093 U CN 205830093U CN 201620641502 U CN201620641502 U CN 201620641502U CN 205830093 U CN205830093 U CN 205830093U
- Authority
- CN
- China
- Prior art keywords
- led
- feed back
- self feed
- feedback resistance
- series
- 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 - Fee Related
Links
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Devices (AREA)
Abstract
This utility model provides a kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED, including: the multiple LED being integrated in a filament and feedback resistance, described LED and described feedback resistance are connected in series, and described feedback resistance is for regulating the electric current in described LED filament.Realize self feed back connection in series-parallel high-voltage LED by the parallel connection of multiple self feed back LED filament to load, it is to avoid the inefficacy that electric current distribution inequality causes.This utility model increases feedback resistance in the LED string of series connection, limits the difference between current between the self feed back LED filament of parallel connection with this；Meanwhile, by the positive temperature coefficient of feedback resistance, the deterioration of electric current maldistribution is stoped further；Thus effectively ensure the normal service life of high-pressure lamp group under parallel connection.
Description
Technical field
This utility model relates to LED and manufactures field, particularly relates to a kind of self feed back LED filament and self feed back connection in series-parallel is high
Pressure LED load.
Background technology
The LED of series-parallel system connects composition tens volts or a few hectovolt high power load has been widely used in illumination neck
Territory.Because LED is originally as the semiconductor device of low pressure, normal working voltage vf of single LEDs is about 3V.Usually meet defeated
Going out the requirement of power, several or tens LEDs need to be connected into high pressure module to reach the requirement of output.More application need
The high-voltage LED module parallel combination again that these are connected, to realize bigger output electric current satisfied application power requirement.City at present
On field, the illumination LED device overwhelming majority of application is formed by this framework.
But because the limitation of LED production technology, running voltage vf of single LEDs often has certain error, may be several
The order of magnitude of ten to hundreds of millivolt.The value of running voltage vf between the series LED module being made up of such components and parts will
There is bigger error.As it is shown in figure 1, LED is as diode component, its operating current is the function of its running voltage vf,
LED two ends apply forward running voltage, and when forward running voltage is less than the threshold voltage of LED, LED is not turned on, and does not produce work
Make electric current；When forward running voltage is more than the threshold voltage of LED, LED turns on luminescence, and produces operating current；Along with forward
The increase of running voltage, operating current sharply increases.As in figure 2 it is shown, the LED module LED 1 and LED2 of two groups of different operating voltages
Be connected in parallel, it is assumed that the running voltage of LED1 is the running voltage less than LED2, then the voltage at LED1 two ends can be forced to draw high
To higher running voltage, such result is to make LED1 work overloadingly under conditions of high current.As it is shown on figure 3, illumination is used
LED is usually and works with constant current mode, and at this moment the operating current of two groups of parallel connection LED modules will have the biggest difference, major part electric current
(if1) will be from LED1 by making it work overloadingly, LED2 only undertakes the underload shape that least a portion of electric current (if2) is then in
State.The running voltage Vf difference of these two groups of LED modules is the biggest, and the current difference caused during application in parallel is the biggest.Such as Fig. 4 institute
Showing, the operating temperature of the LED1 of big electric current over loading is substantially increased (rising to T2 from T1) so that it is running voltage declines further
(dropping to vf1 ' from vf1), and the operating temperature of LED2 declines to a great extent (dropping to T3 from T1), such negative feedback will be disliked rapidly
The distribution of galvanic current, the LED1 causing running voltage relatively low sinks beneath one's burden and open failure, and the most remaining LED2 to bear former
The electric current of two groups of LED modules, also can quickly lose efficacy because of over loading.If the great power LED that many groups are in parallel, such situation
Can become more apparent upon, the problem of inefficacy is more serious.The problems referred to above are one of reliability failures main mechanisms of LED application at present,
Have a strong impact on the service life of LED illumination lamp.
As a example by so-called filament shape LED module, the single module of series connection is made up of 20 plurality of LEDs devices, work electricity
Pressure is general at 65V～75V.Use the electric current of single group filament typically at about 10mA.The running voltage of similar series mould set is usually
There is the difference of 1V～2V, the biggest.When two groups of filament parallel application, current ratio is the most always not equal to 1.Dislike
There will be several times in the case of bad, even tens times or higher, so filament can the most overheated open failure.
The solution that LED industrial quarters is conventional at present is: 1) screens LED raw material in producing supplied materials, uses of a sort
LED chip so that it is running voltage is the most close, so can reduce ultimogenitary series mould set running voltage difference less；
2) high-pressure series module current constant control respectively is often organized, to avoid electric current distribution inequality caused by the running voltage difference that parallel connection causes.
The two scheme is the most preferable, and the production cost of scheme 1 can be higher, it is often more important that divide even if using
The LED of sieve different operating voltage also can only bring and limitedly improve.If the running voltage standard deviation of single LEDs can control
50mV (this needs category filter the most accurately), the series mould set of 70V～80V also has the deviation more than 1V, and this is still
Above-mentioned same problem can be introduced, simply slightly improve in degree.And scheme 2 has been to give up employing parallel connection and has used packet individually perseverance instead
Stream, just not saying whether system bulk allows, the cost increasing by a road current constant control can rise significantly, if multi-channel parallel
Words, system cost can directly be directly proportional rising especially, it is also possible to the most worthless.
The most fundamentally solve LED high-voltage lamp group current sharing issues under the conditions of parallel connection and become this area
One of technical staff's problem demanding prompt solution.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of self feed back LED filament
And the load of self feed back connection in series-parallel high-voltage LED, for solving in prior art what electric current distribution inequality in LED strip Parallel Control caused
Problem of Failure.
For achieving the above object and other relevant purposes, this utility model provides a kind of self feed back LED filament, described reflexive
Feedback LED filament at least includes:
The multiple LED being integrated in a filament and feedback resistance, described LED and the series connection of described feedback resistance are even
Connecing, described feedback resistance is for regulating the electric current in described LED filament.
Preferably, described feedback resistance is positive temperature coefficient resistor.
It is highly preferred that the resistance of described feedback resistance is not more than 300 Ω.
Preferably, described LED is packed LED chip, and each packed LED chip and feedback resistance are fixed on by solid
On heat-conducting substrate, the welding plate connecting each packed LED chip and feedback resistance surface with bonding wire realizes the string of each device in LED module
Connection.
Preferably, described LED is flip LED chips, each flip LED chips and feedback resistance by the solder of bottom with
Metal wire on heat-conducting substrate connects, to realize the series connection of each device in LED module.
It is highly preferred that the material of described heat-conducting substrate is metal, pottery, glass, sapphire, aluminium nitride or quartz.
For achieving the above object and other relevant purposes, this utility model provides a kind of self feed back connection in series-parallel high-voltage LED to bear
Carrying, the load of described self feed back connection in series-parallel high-voltage LED at least includes:
The LED module that many groups are in parallel, described LED module is above-mentioned self feed back LED filament, each by the regulation of each feedback resistance
Electric current in LED module, it is to avoid the inefficacy that electric current distribution inequality causes.
As it has been described above, self feed back LED filament of the present utility model and the load of self feed back connection in series-parallel high-voltage LED, have following
Beneficial effect:
Self feed back LED filament of the present utility model and self feed back connection in series-parallel high-voltage LED are supported in the LED string of series connection increasing
Add feedback resistance, limit the difference between current between LED module in parallel by feedback resistance, it is to avoid larger difference occurs；Meanwhile, logical
Cross the positive temperature coefficient of feedback resistance, can stop further and aggravate electric current maldistribution because of the drift of LED operation voltage
Deteriorate；Thus effectively ensure the normal service life of high-pressure lamp group under parallel connection.
Accompanying drawing explanation
Fig. 1 is shown as the schematic diagram of the VA characteristic curve of LED of the prior art.
Fig. 2 is shown as the structural representation of LED load of the prior art.
Fig. 3 is shown as the principle schematic that in LED load of the prior art, electric current distribution is uneven.
Fig. 4 is shown as the principle schematic that in LED load of the prior art, variations in temperature aggravation electric current distribution is uneven.
Fig. 5 is shown as the structural representation of self feed back connection in series-parallel high-voltage LED of the present utility model load.
Fig. 6 is shown as self feed back connection in series-parallel high-voltage LED of the present utility model and loads the structural representation realized by LED filament
Figure.
Fig. 7 is shown as the physical arrangement schematic diagram of self feed back connection in series-parallel high-voltage LED of the present utility model load.
Fig. 8 is shown as the formal dress structural representation of self feed back connection in series-parallel high-voltage LED of the present utility model load.
Fig. 9 is shown as the inverted structure schematic diagram of self feed back connection in series-parallel high-voltage LED of the present utility model load.
Figure 10 is shown as the operation principle schematic diagram of self feed back connection in series-parallel high-voltage LED of the present utility model load.
Element numbers explanation
1 heat-conducting substrate
2 packed LED chips
3 feedback resistances
4 solids
5 welding plates
6 bonding wires
7 insulators
8 flip LED chips
9 solders
10 metal wires
Detailed description of the invention
Below by way of specific instantiation, embodiment of the present utility model being described, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages of the present utility model and effect easily.This utility model can also be by additionally
Different detailed description of the invention is carried out or applies, the every details in this specification can also based on different viewpoints with should
With, under without departing from spirit of the present utility model, carry out various modification or change.
Refer to Fig. 5～Figure 10.It should be noted that the diagram provided in the present embodiment illustrates this most in a schematic way
The basic conception of utility model, the most graphic in time only display with relevant assembly in this utility model rather than is implemented according to reality
Component count, shape and size are drawn, and during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random changing
Become, and its assembly layout kenel is likely to increasingly complex.
As shown in Fig. 5～Fig. 9, this utility model provides a kind of self feed back connection in series-parallel high-voltage LED load, described self feed back string
Parallel high voltage LED load at least includes:
The LED modules that many groups are in parallel, each LED module includes multiple LED and feedback resistance, described LED and described
Feedback resistance is connected in series, and described feedback resistance is for regulating the electric current in each LED module.
Specifically, as it is shown in figure 5, in the present embodiment, as a example by 2 groups of LED modules in parallel, the respectively the oneth LED mould
Group LED1 and the 2nd LED module LED 2, a described LED module LED 1 include series connection the first LED and with a described LED
Lamp series connection the first feedback resistance R1, described 2nd LED module LED 2 include series connection the second LED and with described 2nd LED
Second feedback resistance R2 of lamp series connection.Described first feedback resistance R1 can be series at any position of described first LED string, with
The described second feedback resistance R2 in sample ground can be series at any position of described second LED string, is not limited with the present embodiment.Described
Oneth LED module LED 1 and described 2nd LED module LED 2 are connected in parallel, and are connected in series in a setting electric current Ic, described in set
Determine the constant current that electric current Ic is the output of LED constant current control chip.
Specifically, described first feedback resistance R1 and described second feedback resistance R2 is positive temperature coefficient resistor.Resistance
Positive temperature coefficient refers to that the resistance value of material can rise with temperature and rise, and positive temperature coefficient is the biggest, under identical variations in temperature,
The resistance increase of resistance is the most.
Specifically, in the present embodiment, the resistance of described first feedback resistance R1 and described second feedback resistance R2 is equal,
It is set as no more than 300 Ω.Also dependent on different operating voltage, each feedback resistance is set to different resistances, not with this reality
Execute example to be limited.
Specifically, as shown in Figure 6, described LED module can be integrated in a filament, forms a LED filament, by many
The parallel connection of LED filament realizes the load of described self feed back connection in series-parallel high-voltage LED, in the present embodiment, only shows 2 LED filament
The described self feed back connection in series-parallel high-voltage LED load realized in parallel.As it is shown in fig. 7, described LED module can be by being welded in heat conduction
LED chip and the series connection of resistor on substrate realize.The material of described heat-conducting substrate 1 includes but not limited to metal, pottery, glass
Glass, sapphire, aluminium nitride or quartz, described heat-conducting substrate 1 for heat radiation to reduce temperature to running voltage and operating current
Impact.
More specifically, as shown in Figure 8, described LED filament includes described heat-conducting substrate 1, packed LED chip 2 and feedback
Resistance 3, wherein, described packed LED chip 2 and described feedback resistance 3 are fixed on described heat-conducting substrate 1 by solid 4, institute
The surface configuration stating packed LED chip 2 and described feedback resistance 3 has welding plate 5, by bonding wire 6 by multiple packed LED chips 2 and
Described feedback resistance 3 is cascaded and constitutes a LED module.Wherein, the material selection metal of described heat-conducting substrate 1, then in institute
The one end stating heat-conducting substrate 1 arranges insulator 7 the isolation of the positive and negative electrode of described LED filament to be opened, it is to avoid short circuit.
More specifically, as it is shown in figure 9, described LED filament includes described heat-conducting substrate 1, flip LED chips 8 and feedback
Resistance 3, wherein, described flip LED chips 8 and described feedback resistance 3 pass through on solder 10 and the described heat-conducting substrate 1 of bottom
Metal wire 9 connects, and to realize connecting of multiple flip LED chips 8 and described feedback resistance 3, and then constitutes a LED module.Institute
The material stating solder 8 includes but not limited to gold-tin alloy, tin cream, silver slurry, is not limited with the present embodiment.Wherein, described heat conduction base
The material selection pottery of plate 1, the positive and negative electrode of the most described LED filament directly with described feedback resistance 3 and described flip LED chips
8 connect, it is not necessary to extra insulator.
As shown in Figure 10, the current distribution method of described self feed back connection in series-parallel high-voltage LED load is as follows:
The load of described self feed back connection in series-parallel high-voltage LED uses current constant control, flows through the total current of each LED module for setting
Value.
The running voltage of the LED string in each LED module, is divided by bigger in the LED module that running voltage is low
Electric current, then the voltage on the feedback resistance in the LED module that running voltage is low increases, the voltage compensation LED on feedback resistance
The running voltage of string, limits the electric current flowing through in the LED module that running voltage is low and continues to rise；Otherwise, the LED that running voltage is high
By less point electric current in module, then the voltage on the feedback resistance in the LED module that running voltage is high reduces, feedback resistance
On voltage offset described in the running voltage of LED string, hinder the electric current flowing through in described LED module to continue to decline；
The difference of point electric current flowing through each LED module reduces, it is to avoid the inefficacy that electric current distribution inequality causes.
Specifically, in the present embodiment, as a example by 2 LED modules in parallel, the electricity of a described LED module LED 1 is flow through
Stream is if1, and the electric current flowing through described 2nd LED module LED 2 is if2, and total current is Ic=if1+if2.At fixing work electricity
Flowing down, the running voltage of LED module is vw=vf+vr, and wherein vf is the running voltage on LED string, and vr is on feedback resistance
Voltage.When being in condition in parallel, the running voltage of two groups of (parallel connection of many groups is equally applicable) LED modules is equal, i.e. vw1=
Vw2, if running voltage vf on each LED string, it is assumed that the running voltage on described first LED string would be less than described second
Running voltage on LED string, i.e. vf2 > vf1；The LED module LED 1 that then running voltage is relatively low will flow through bigger electricity
Stream, otherwise, the 2nd LED module LED 2 that running voltage is higher will flow through less electric current, i.e. if1 > if2；So, described
Voltage on one feedback resistance R1 will rise, and the voltage on described second feedback resistance R2 will decline, i.e. vr1 > vr2；Described
Voltage vr1 on first feedback resistance R1 compensates running voltage vf1 of described first LED string, thus limit flow through described
The electric current if1 of the oneth LED module LED 1 continues to rise, and the voltage vr2 on described second feedback resistance R2 offsets described second
Running voltage vf2 of LED string, thus hinder the electric current if2 continuation decline flowing through described 2nd LED module LED 2.Flow through
The difference of point electric current of a described LED module LED 1 and described 2nd LED module LED 2 reduces, and is prevented effectively from electric current and distributes not
The inefficacy all caused.
Further, the LED module temperature that point electric current is big rises, and the resistance of the feedback resistance of positive temperature coefficient is also with temperature
Rising, the voltage on feedback resistance increases further；The LED module temperature that electric current is little is divided to decline, the feedback electricity of positive temperature coefficient
The resistance of resistance also declines with temperature, and the voltage on feedback resistance reduces further.
Specifically, in a described LED module LED 1, big electric current if1 causes temperature to rise, due to described first feedback
Resistance R1 is positive temperature coefficient device, and therefore, the resistance of the most described first feedback resistance R1 will become big,
Thus cause the voltage on described first feedback resistance R1 to rise faster.And in described 2nd LED module LED 2, small area analysis
If1 causes temperature to decline, owing to described second feedback resistance R2 is positive temperature coefficient device, therefore, in the situation that temperature reduces
Under described the and the resistance of feedback resistance R2 will diminish, thus cause the voltage on described second feedback resistance R2 to decline faster.
Self feed back connection in series-parallel high-voltage LED of the present utility model load can limit the electric current between module in parallel well
Difference, it is to avoid larger difference occur, suitably compensating resistance as long as designing according to operating current, the difference between current between module in parallel is just
Can be efficiently controlled in one limited within the scope of.The more important thing is, because the resistance feedback of positive temperature coefficient, prevent
Under high electric current, running voltage is drifted about the most further and is aggravated the deterioration of electric current maldistribution；Thus effectively ensure shape in parallel
The normal service life of high-pressure lamp group under state.
As a example by the high-voltage LED module of filament shape, usual running voltage is 68V, and design work electric current is 10mA:
Example 1, the running voltage such as two groups of filaments in parallel is respectively 67V and 69V, and parallel operation electric current is 19mA, then
In parallel by the scheme of prior art, the difference of the running voltage that the electric current of two groups of filaments is respectively 18mA and 1mA, 2V will result in electricity
Flow ratio reaches 18 times, has a strong impact on service life.And use self feed back connection in series-parallel high-voltage LED of the present utility model to load, in often group
The feedback resistance of one 800 Ω of series connection on filament, steady-state current is then controlled as 11mA and 8mA, and current ratio is then improved as
1.37, the Problem of Failure that electric current distribution inequality causes can be greatly reduced.
Example 2, the running voltage such as two groups of filaments in parallel is respectively 67V and 68V, and parallel operation electric current is 20mA, then
In parallel by the scheme of prior art, the difference of the running voltage that the electric current of two groups of filaments is respectively 13mA and 7mA, 1V will result in electricity
Flow ratio reaches 1.68 times.And use self feed back connection in series-parallel high-voltage LED of the present utility model to load, connect one on filament often organizing
The feedback resistance of 200 Ω, steady-state current is then controlled as 10.7mA and 9.3mA, and current ratio is 1.15, improves electric current equally
The uneven problem of distribution.
The resistance feedback system design that this utility model provides, can improve the distribution of the electric current under the conditions of parallel connection well and ask
Topic, the difference of running voltage is the biggest, and feedback compensation resistance also needs to increase, and the power consumption consumed on feedback resistance also can increase.As
Under the conditions of example 1, feedback resistance will bring the power consumption of 320mW, and running voltage the most in parallel will rise 16V.And under the conditions of example 2,
The power consumption of feedback resistance is 40mW, and running voltage rises about 2V.In view of under the system effectiveness that the power consumption of feedback resistance is brought
Fall, the feedback resistance allowed under Practical Condition may be at 300 below Ω.This utility model is combining running voltage classification simultaneously
Under technology controlling and process, application more effectively, first carries out sub-sieve to LED component, it is ensured that the running voltage of each LED string controls one
In the range of Ding.
As it has been described above, self feed back LED filament of the present utility model and the load of self feed back connection in series-parallel high-voltage LED, have following
Beneficial effect:
Self feed back LED filament of the present utility model and self feed back connection in series-parallel high-voltage LED are supported in the LED string of series connection increasing
Add feedback resistance, limit the difference between current between LED module in parallel by feedback resistance, it is to avoid larger difference occurs；Meanwhile, logical
Cross the positive temperature coefficient of feedback resistance, can stop further and aggravate electric current maldistribution because of the drift of LED operation voltage
Deteriorate；Thus effectively ensure the normal service life of high-pressure lamp group under parallel connection.
In sum, this utility model provides a kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED, bag
Include: the multiple LED being integrated in a filament and feedback resistance, described LED and described feedback resistance are connected in series, described
Feedback resistance is for regulating the electric current in described LED filament.Self feed back string is realized also by the parallel connection of multiple self feed back LED filament
Connection high-voltage LED load, it is to avoid the inefficacy that electric current distribution inequality causes.Self feed back LED filament of the present utility model and self feed back string
Parallel high voltage LED load increases feedback resistance in the LED string of series connection, by feedback resistance limit LED module in parallel it
Between difference between current, it is to avoid larger difference occurs；Meanwhile, by the positive temperature coefficient of feedback resistance, can stop further because of LED work
Make the drift of voltage and aggravate the deterioration of electric current maldistribution；Thus effectively ensure the normal of high-pressure lamp group under parallel connection
Service life.So, this utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only illustrative principle of the present utility model and effect thereof are new not for limiting this practicality
Type.Above-described embodiment all can be carried out by any person skilled in the art under spirit and the scope of the present utility model
Modify or change.Therefore, art has usually intellectual such as without departing from the essence disclosed in this utility model
All equivalences completed under god and technological thought are modified or change, and must be contained by claim of the present utility model.
Claims (7)
1. a self feed back LED filament, it is characterised in that described self feed back LED filament at least includes:
The multiple LED being integrated in a filament and feedback resistance, described LED and described feedback resistance are connected in series, institute
State feedback resistance for regulating the electric current in described LED filament.
Self feed back LED filament the most according to claim 1, it is characterised in that: described feedback resistance is positive temperature coefficient electricity
Resistance.
Self feed back LED filament the most according to claim 1 and 2, it is characterised in that: the resistance of described feedback resistance is not more than
300Ω。
Self feed back LED filament the most according to claim 1, it is characterised in that: described LED is packed LED chip,
Each packed LED chip and feedback resistance are fixed on heat-conducting substrate by solid, connect each packed LED chip with bonding wire
And the welding plate on feedback resistance surface realizes the series connection of each device in LED module.
Self feed back LED filament the most according to claim 1, it is characterised in that: described LED is flip LED chips,
Each flip LED chips and feedback resistance are connected with the metal wire on heat-conducting substrate by the solder of bottom, to realize LED mould
The series connection of each device in group.
6. according to the self feed back LED filament described in claim 4 or 5, it is characterised in that: the material of described heat-conducting substrate is gold
Genus, pottery, glass, sapphire, aluminium nitride or quartz.
7. a self feed back connection in series-parallel high-voltage LED load, it is characterised in that described self feed back connection in series-parallel high-voltage LED loads at least
Including:
The LED module that many groups are in parallel, described LED module is the self feed back LED filament in claim 1～6 described in any one,
The electric current in each LED module is regulated, it is to avoid the inefficacy that electric current distribution inequality causes by each feedback resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620641502.7U CN205830093U (en) | 2016-06-24 | 2016-06-24 | A kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620641502.7U CN205830093U (en) | 2016-06-24 | 2016-06-24 | A kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205830093U true CN205830093U (en) | 2016-12-21 |
Family
ID=58146541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620641502.7U Expired - Fee Related CN205830093U (en) | 2016-06-24 | 2016-06-24 | A kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205830093U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110944432A (en) * | 2019-12-16 | 2020-03-31 | 华帝股份有限公司 | LED lamp constant current output circuit with over-temperature detection function and over-temperature detection method |
| CN110944433A (en) * | 2019-12-16 | 2020-03-31 | 华帝股份有限公司 | Current balance control circuit and control method for matrix LED lamp |
| CN110996458A (en) * | 2019-12-16 | 2020-04-10 | 华帝股份有限公司 | Matrix LED lamp constant current control circuit and constant current control method based on double triodes |
| CN110996435A (en) * | 2019-12-16 | 2020-04-10 | 华帝股份有限公司 | LED lamp constant current output circuit with self-protection function and constant current control method |
-
2016
- 2016-06-24 CN CN201620641502.7U patent/CN205830093U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110944432A (en) * | 2019-12-16 | 2020-03-31 | 华帝股份有限公司 | LED lamp constant current output circuit with over-temperature detection function and over-temperature detection method |
| CN110944433A (en) * | 2019-12-16 | 2020-03-31 | 华帝股份有限公司 | Current balance control circuit and control method for matrix LED lamp |
| CN110996458A (en) * | 2019-12-16 | 2020-04-10 | 华帝股份有限公司 | Matrix LED lamp constant current control circuit and constant current control method based on double triodes |
| CN110996435A (en) * | 2019-12-16 | 2020-04-10 | 华帝股份有限公司 | LED lamp constant current output circuit with self-protection function and constant current control method |
| CN110996458B (en) * | 2019-12-16 | 2022-02-22 | 华帝股份有限公司 | Matrix LED lamp constant current control circuit and constant current control method based on double triodes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205830093U (en) | A kind of self feed back LED filament and the load of self feed back connection in series-parallel high-voltage LED | |
| CN102479489B (en) | Semiconductor integrated circuit and method of work thereof | |
| CN105282929B (en) | A kind of full voltage piece-wise linear constant current LED drive circuit of automatic switchover mode | |
| US20090212717A1 (en) | Power Supply System and Method for the Operation of an Electrical Load | |
| CN105323910B (en) | Lighting device and light-emitting device | |
| CN205883648U (en) | LED both ends constant current drive chip | |
| US20060171135A1 (en) | Light emitting apparatus | |
| US20140367710A1 (en) | Led module | |
| CN106489304A (en) | Light emitting diode illuminating apparatus using alternating current power supply | |
| WO2017005135A1 (en) | Naked crystal encapsulation light adjustable photoelectric led lighting assembly and manufacturing process | |
| CN102833909A (en) | Light emitting device and illumination apparatus having same | |
| US20140152195A1 (en) | Method for Overcoming Excessively High Temperature of Constant Current Driving Chip and LED Light Bar Driving Circuit | |
| CN103957644B (en) | LED backlight source for liquid crystal display device | |
| CN206875378U (en) | LED drivings system in package and the LED light device containing it | |
| CN110030508A (en) | Color temperature-tunable flexible LED lamp strand and the filament lamp for using the filament item | |
| CN110388612A (en) | Color temperature-tunable LED light strand and the LED filament lamp for using the LED light strand | |
| CN102065597A (en) | Light-emitting diode (LED) string set current equalizing circuit | |
| US8970119B2 (en) | Light emitting device and method of controlling light emitting device | |
| CN107660013A (en) | A kind of LED both ends constant-current driven chip and constant current driving method | |
| CN106131995A (en) | A kind of self feed back connection in series-parallel high-voltage LED load and current control method | |
| CN209688578U (en) | Color temperature-tunable flexible LED lamp strand and the filament lamp for using the filament item | |
| CN107660019A (en) | Light source and light emitting module | |
| CN110072315A (en) | Has the light emitting device of temperature compensating element | |
| CN107302813A (en) | A kind of current control circuit | |
| CN103533709A (en) | LED (light-emitting diode) filament stable-power combination driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 Termination date: 20170624 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |