CN102159012B - Semiconductor illuminating lamp - Google Patents
Semiconductor illuminating lamp Download PDFInfo
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- CN102159012B CN102159012B CN2011100944781A CN201110094478A CN102159012B CN 102159012 B CN102159012 B CN 102159012B CN 2011100944781 A CN2011100944781 A CN 2011100944781A CN 201110094478 A CN201110094478 A CN 201110094478A CN 102159012 B CN102159012 B CN 102159012B
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Abstract
The invention relates to a lamp, in particular to a semiconductor illuminating lamp which comprises a light-emitting diode group, wherein the light-emitting diode group is connected with the output end of a bridge type rectifier, one input end of the bridge type rectifier is connected with an alternating current power supply, a negative temperature coefficient thermistor is serially connected between the other input end of the bridge type rectifier and the alternating current power supply, a current-limit reactor is arranged between the negative temperature coefficient thermistor and the bridge-type rectifier, and first discharge resistors are connected in parallel to two ends of the current-limit reactor. According to the invention, current of each group of semiconductor illuminating lamps can be conveniently regulated to ensure that the semiconductor illuminating lamp works in an optimal state so that effects of energy saving and long service life of the semiconductor illuminating lamp are achieved; and the invention has the advantages of low cost, less failures and easiness for realization.
Description
Technical field
The present invention relates to a kind of lamp, relate in particular to a kind of semi-conductor lighting lamp.
Background technology
In existing semiconductor light-emitting-diode is used, its representational being applied as: as back lighting, display screen and the board of instrument and meter and various kinds of equipment, light of stage decoration, portable lighting etc.Also few as the room lighting of real meaning and city illumination and road lighting.
Semiconductor light-emitting-diode---be present LED, single LED luminous power and driving voltage are all very low.In display screen and board, light of stage decoration, portable lighting, room lighting and city illumination and road lighting, usually all use a plurality of LED combinations to strengthen luminous power.
The LED combination needs independent driving power thus.Thereby the driving power of various multi-form LED combinations appearred.
Small-sized portable lighting---be that torch, head lamp etc. can directly be used dry cell, storage battery power supply.The larger portable lighting of power can't directly be used dry cell, storage battery power supply.
LED also has characteristics, and its electric current is very responsive to supply voltage, and when voltage slightly increases, electric current just increases a lot, but that its light output increases is few, very fast just saturated of the output variable of light.
Slightly high voltage just can cause excessive electric current, and the electric current that is equivalent to pass through is larger, and internal resistance is less.
When voltage was slightly high, electric current increased a lot.Just can greatly reduce luminous efficiency and the useful life of LED, make its serviceability be lower than fluorescent lamp and gas electroluminescent lamp
Also because LED small-sized requires its assembly precision high, rigging error occurs easily, cause that the LED required voltage of same specification is different with electric current.When working under identical conditions, the product of different brightness, particularly different batches may appear.
Existing driving power to the great power LED associating power supply has various ways, all adopt the modes such as transformer or electronic equipment, 220 volts alternating voltages, electric current are become constant voltage or constant current as the driving power of LED, for the LED assembly that needs accurate adjustment voltage or electric current, the constant voltage of its batch production or constant-current driving power supply just have been not suitable for.
The simple and easy methods such as " capacitance decompression ", resistance step-down have also been used in the fixing compact LED combination of using.
But, in the technology of existing use electric capacity, think that this technology is " reduction technology ", and think that LED damages easily because electric capacity charges repeatedly.
" capacitance decompression " technology of use is that use principle is improper, causes the LED lamp not reach energy-conservation and long-life effect.
In small-sized seven-color LED cup, " capacitance decompression " and resistance step-down method have just been used.But the seven-color LED cup just is used for decorating, and only requires decorative effect, or as floor light, just is not strict with the long-life energy-conservation.
1 millimeter of the luminous diameter of used LED in small-sized seven-color LED cup, operating current is with milliamperemeter.
Summary of the invention
The invention provides a kind of semi-conductor lighting lamp for solving the problems of the technologies described above, purpose is to use easily the LED illumination in room lighting and city illumination and road lighting, and makes semi-conductor lighting lamp play energy-conservation and effect life-saving.
Be the semi-conductor lighting lamp of the present invention that achieves the above object, comprise the light-emitting diode group, the light-emitting diode group is connected with the output of bridge rectifier, an input of bridge rectifier is connected with AC power, be in series with negative tempperature coefficient thermistor between another input of bridge rectifier and the AC power, be provided with current limiting reactor between negative tempperature coefficient thermistor and the bridge rectifier, the current limiting reactor two ends are parallel with the first discharge resistance.
The two ends of described light-emitting diode group are parallel with filter capacitor.
The two ends of described filter capacitor are parallel with the second discharge resistance.
Described current limiting reactor is the combination of condenser reactance device, inductive reactance device or capacitor and inductance coil.
Advantageous effect of the present invention: with the semi-conductor lighting lamp that the present invention makes, operating voltage is supply voltage, and its operating current is the optimum current of photogenerator.
When supply line was inductive loaded line, the semi-conductor lighting lamp with using the capacitor current limliting can make supply line reach better effect.
Common supply line, particularly light-loaded circuit are inductive loaded lines, and access capacity load circuit can improve the power factor (PF) of supply line.
When supply line is the capacity load circuit, capacitor can be changed to the inductive reactance device, can make supply line reach optimum efficiency.
Because the induction reactance of fixed inductive reactance device can not arbitrarily be adjusted, come its serial or parallel connection with capacitor when needing to adjust, to increase or to reduce its reactance, namely become the reactor that inductance induction reactance and electric capacity capacitive reactance form.
The capacitive reactance of capacitor can be directly changes with the capacitor of different capabilities, and the adjustment of its capacitive reactance is very convenient.
The present invention can adjust the electric current of every group of semi-conductor lighting lamp easily, and it is worked under the state of the best, reach semiconductor lighting streetlamp energy-saving, long-life effect, and cost is low, and fault is few, is easy to realize.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Among the figure: 1, light-emitting diode group; 2, bridge rectifier; 3, the second discharge resistance; 4, negative tempperature coefficient thermistor; 5, current limiting reactor; 6, the first discharge resistance; 7, filter capacitor.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Semi-conductor lighting lamp of the present invention as shown in the figure, comprise light-emitting diode group 1, light-emitting diode group 1 is connected with the output of bridge rectifier 2, an input of bridge rectifier 2 is connected with AC power, be in series with negative tempperature coefficient thermistor 4 between another input of bridge rectifier 2 and the AC power, be provided with current limiting reactor 5 between negative tempperature coefficient thermistor 4 and the bridge rectifier 2, current limiting reactor 5 two ends are parallel with the first discharge resistance 6, the two ends of light-emitting diode group 1 are parallel with filter capacitor 7, and the two ends of filter capacitor 7 are parallel with the second discharge resistance 3; Current limiting reactor 5 is the combination of capacity reactance device, inductive reactance device or capacitor and inductance coil.
The below is the detailed description to circuit theory diagrams.
For ease of explanation and formula of reduction, following impact of omitting filter capacitor and the second discharge resistance in various is disregarded.
When semi-conductor lighting lamp worked, electric current was in the circuit:
When current limiting reactor is the capacity reactance device
When current limiting reactor is the inductive reactance device
U is supply voltage;
R be light-emitting diode in the circuit internal resistance, current-limiting resistance and other elements etc. resistance and;
X
LBe the induction reactance of inductor, X
L=2 π fL, wherein f is supply frequency, L is inductance;
X
CBe the capacitive reactance of capacitor, X
C=1/2 π fC, wherein C is electric capacity.
Because the operating current of semi-conductor lighting lamp is less, and its internal resistance is very little, the internal resistance after a plurality of LED series connection and also little, required capacitive reactance or induction reactance are larger.
Even can learn that by following formula the R resistance has larger variation, the variation of electric current is also very little, can accomplish very accurate with capacitive reactance or induction reactance to the restriction of electric current.Even R=is X
L=X
CThe time, with the R short circuit, electric current also can only increase to 1.4142 times.
When inductance impedor and the series connection of capacity reactance device, electric current is in the circuit:
When inductance impedor and the parallel connection of electric capacity capacitive reactance device, the reactance of current limiting reactor is
X= X
LX
C/（X
C-X
L）
By above-mentioned as can be known various, can control exactly the size of electric current with current limiting reactor.
Again according to the switching law of circuit
When the moment of inductive reactance device current-limiting circuit energising, electric current is in the circuit
I=U（1-e
-Rt/L）/R
When the moment of capacitor current-limiting circuit energising, electric current is in the circuit
I=Ue
-t/RC/R
Therefore, when the R value was very little, electric current was very large in the moment of connecting in the circuit, and the damage of LED just occurs in connects constantly.
Because LED can not connect too much, so the internal resistance after a plurality of LED series connection and also little, the internal resistance when particularly electric current is excessive is less.Must the suitable current-limiting resistance of series connection.
When the operating current of circuit was very little, current-limiting resistance can be conventional, electric-resistance.
As the illuminating lamp of real meaning, its electric current is larger, reaches the electric current of ampere level, just can not use the conventional, electric-resistance current limliting again.Must use negative tempperature coefficient thermistor, could reduce energy consumption, reach energy-conservation and long-life effect of using semiconductor lighting.
Use the semi-conductor lighting lamp of negative tempperature coefficient thermistor current limliting can not demand working after outage, in order to avoid when the current-limiting resistance resistance is also very little, connect moment to produce very large electric current and damage LED.
When discharge resistance is used for shut-off circuit to capacitor discharge, contingent shock hazard when preventing from dismantling.
The terminal voltage of current limiting capacitance when work is
U
LCDBe the terminal voltage sum after a plurality of LED series connection, the internal resistance after a plurality of LED series connection and also little, U
LCDAlso little, the terminal voltage of current-limiting resistance also very little omitting is disregarded.Therefore the terminal voltage of current limiting capacitance when work is quite high.
When there not being parallel discharge resistance, when again connecting circuit, its terminal voltage will with the supply voltage superposition, impact LED.
When discharge resistance is used for shut-off circuit inductor is discharged, the electric spark in the time of can reducing to close is to the infringement of switch.
The discharge resistance resistance is very large, can reach 200K or larger, and the impact when circuit is worked is minimum, and energy consumption is also minimum.
Claims (3)
1. semi-conductor lighting lamp, comprise the light-emitting diode group, it is characterized in that the light-emitting diode group is connected with the output of bridge rectifier, an input of bridge rectifier is connected with AC power, be in series with negative tempperature coefficient thermistor between another input of bridge rectifier and the AC power, be provided with current limiting reactor between negative tempperature coefficient thermistor and the bridge rectifier, the current limiting reactor two ends are parallel with the first discharge resistance, and current limiting reactor is the combination of condenser reactance device, inductive reactance device or capacitor and inductance coil.
2. semi-conductor lighting lamp according to claim 1 is characterized in that the two ends of described light-emitting diode group are parallel with filter capacitor.
3. semi-conductor lighting lamp according to claim 2 is characterized in that the two ends of described filter capacitor are parallel with the second discharge resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100944781A CN102159012B (en) | 2011-04-15 | 2011-04-15 | Semiconductor illuminating lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100944781A CN102159012B (en) | 2011-04-15 | 2011-04-15 | Semiconductor illuminating lamp |
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| CN102159012A CN102159012A (en) | 2011-08-17 |
| CN102159012B true CN102159012B (en) | 2013-10-30 |
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| CN2011100944781A Expired - Fee Related CN102159012B (en) | 2011-04-15 | 2011-04-15 | Semiconductor illuminating lamp |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306485A (en) * | 2011-09-06 | 2012-01-04 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) driving circuit, liquid crystal display device and LED driving method |
| CN102943977A (en) * | 2012-11-14 | 2013-02-27 | 广西玖典电子新材料有限公司 | Large-power light emitting diode (LED) strip-shaped structure energy-saving lamp |
| ES2481965B1 (en) * | 2013-01-04 | 2015-09-03 | Cero Cero Rotulos S.L. | High energy efficiency circuit for connection of high brightness LEDs |
| CN111479354A (en) * | 2019-01-04 | 2020-07-31 | 一统光电（江苏）有限公司 | Interference-free low-cost long-life L ED power supply directly using mains supply and L ED lighting appliance thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201111589Y (en) * | 2007-09-10 | 2008-09-10 | 常州宝迪电子有限公司 | Integrated LED road lamp |
| CN201318651Y (en) * | 2008-10-15 | 2009-09-30 | 刘东芳 | Led street lamp circuit |
| CN201407567Y (en) * | 2009-05-26 | 2010-02-17 | 李博 | Led ceiling lamp |
| CN201561306U (en) * | 2009-11-04 | 2010-08-25 | 河源市超越光电科技有限公司 | Organic LED illuminating lamp |
| CN201964218U (en) * | 2011-04-15 | 2011-09-07 | 周必忠 | Semiconductor lighting lamp |
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2011
- 2011-04-15 CN CN2011100944781A patent/CN102159012B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201111589Y (en) * | 2007-09-10 | 2008-09-10 | 常州宝迪电子有限公司 | Integrated LED road lamp |
| CN201318651Y (en) * | 2008-10-15 | 2009-09-30 | 刘东芳 | Led street lamp circuit |
| CN201407567Y (en) * | 2009-05-26 | 2010-02-17 | 李博 | Led ceiling lamp |
| CN201561306U (en) * | 2009-11-04 | 2010-08-25 | 河源市超越光电科技有限公司 | Organic LED illuminating lamp |
| CN201964218U (en) * | 2011-04-15 | 2011-09-07 | 周必忠 | Semiconductor lighting lamp |
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| CN102159012A (en) | 2011-08-17 |
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