CN201672427U - Led illuminating device - Google Patents
Led illuminating device Download PDFInfo
- Publication number
- CN201672427U CN201672427U CN2010201886905U CN201020188690U CN201672427U CN 201672427 U CN201672427 U CN 201672427U CN 2010201886905 U CN2010201886905 U CN 2010201886905U CN 201020188690 U CN201020188690 U CN 201020188690U CN 201672427 U CN201672427 U CN 201672427U
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- circuit
- photocell
- led
- lighting device
- power storage
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Abstract
The utility model discloses an LED illuminating device comprising a direct-current charging circuit, a power storage loop, an LED drive circuit, and an LED array formed by a plurality of LEDs, which are connected in sequence. The power storage loop comprises a capacitor bank and a photocell circuit which are connected between the direct-current charging circuit and the LED drive circuit; the photocell circuit and the capacitor bank are connected in parallel and then grounded by a first resistor; and the photocell circuit comprises a photocell, an illuminating switch and a second resistor which are sequentially connected in series. In the utility model, the LED illuminating device adopts the capacitor bank to conduct power storage, works at a frequency of 50 Hz or 60 Hz, has small loss, is energy-saving and environment-friendly, and has light weight; in addition, when in emergency, the photocell can be used for absorbing solar energy to supplement energy, thus avoiding the phenomenon that the LED array has unstable voltage caused by unstable voltage of the charging circuit, and further leading to stable illumination of the LED array.
Description
Technical field
The utility model relates to lighting device, relates in particular to a kind of LED lighting device.
Background technology
At present, LED compares to the unexistent advantage of traditional lighting light source with it, such as lower power demand, response speed, higher shock resistance, long service life, environmental protection and the luminous efficiency that constantly improves fast etc. faster, become the light source of new generation that most possibly substitutes conventional light source at present in the world.
The LED lighting device of present stage adopts dry cell more, but a large amount of uses of dry cell have brought great injury to environment.Because dry cell uses a certain amount of mercury in manufacture process, and mercury is a kind of harmful retention toxicosis material to human body, and very easily contaminated environment, particularly water quality, causes all harm.According to statistics, annual 5000000000 in the dry cell of producing of China, wherein zinc-mercuric oxide cell and alkaline battery are 100,000,000,100 tons of mercury of annual battery.Because people use up battery and arbitrarily throw out without care, the time one is long, exposes to the sun and rain or imbeds undergroundly, tends to contaminated environment like this, has become inexorable trend with the traditional dry cell of element replacement of environmental protection and energy saving.So the LED lighting device of the rechargeable type that can reuse arises at the historic moment.
Mostly existing LED lighting device is to adopt lithium battery, nickel-based battery storage of electrical energy, yet this type of installs, and often weight is big, is not easy to carry, and its charging/discharging voltage shakiness very easily causes the luminous instability of LED.In addition, the life-span of lithium battery and nickel-based battery is very limited, has shortened the service life of LED lighting device.Therefore, demand urgently providing a kind of improved LED lighting device to overcome above-mentioned defective.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of energy-conserving and environment-protective, is easy to carry, the LED lighting device of luminous stable and long service life.
In order to solve the problems of the technologies described above, the utility model provides a kind of LED lighting device, and it comprises dc charging circuit, electric power storage loop, led drive circuit that connects successively and the led array that is made of several LED.Described electric power storage loop comprises capacitor group and the photocell circuit that is connected between described dc charging circuit and the described led drive circuit, described photocell circuit with after described capacitor group is in parallel by first resistance eutral grounding.Described photocell circuit comprises photocell, light switch and second resistance of series connection successively.
Compared with prior art, because the utility model adopts the capacitor group to carry out electric power storage, because it works in 50 or 60 hertz, loss is little, and energy-conserving and environment-protective and weight are little.In addition, when urgent, can absorb the solar energy makeup energy, avoid the charging circuit spread of voltage and the led array voltage instability that causes, thereby made the led array stabilized illumination by photocell.
As preferred embodiment of the present utility model, described led drive circuit comprises unstable oscillation device, switching transistor and inductance, the input of described unstable oscillation device is connected with described electric power storage loop, output links to each other with the control end of described switching transistor, the hot end of the controlled end of described switching transistor links to each other with described electric power storage loop, cold end is connected with an end of described inductance, and the other end of described inductance connects described led array and ground respectively.Aforementioned led drive circuit can provide stable voltage for led array, guarantees its stabilized illumination under low-voltage.
Preferably, described switching transistor is a PNP transistor, and it has high dc gain and low collection is penetrated saturation voltage, to obtain optimum efficiency.
Preferably, described photocell circuit also comprises isolating diode, and the positive pole of described isolating diode links to each other with described photocell, and the negative pole of described isolating diode links to each other with described dc charging circuit.This isolating diode can be avoided dc charging circuit and photocell mutual interference mutually.
Preferably, described capacitor group comprises the capacitor of a plurality of 1F.Volume is big, and heat radiation better.
Preferably, described dc charging circuit comprises current limliting reduction voltage circuit, diode rectifier circuit and the filter circuit that links to each other successively with electricity network.So the little charging interval of charging current long, the service life of improving the capacitor group.
By following description also in conjunction with the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used to explain embodiment of the present utility model.
Description of drawings
Fig. 1 is the theory diagram of the utility model LED lighting device.
Fig. 2 is the detailed circuit diagram in the electric power storage loop of LED lighting device shown in Figure 1.
Fig. 3 is the detailed circuit diagram of LED LED illumination device drive circuit shown in Figure 1 and led array.
Fig. 4 is the detailed circuit diagram of the dc charging circuit of LED lighting device shown in Figure 1.
The specific embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the utility model provides a kind of energy-conserving and environment-protective, has been easy to carry and stable high LED lighting device.
Elaborate the technical scheme of the utility model embodiment below in conjunction with accompanying drawing.As shown in Figure 1, the LED lighting device of present embodiment it comprise successively dc charging circuit 1, electric power storage loop 2, led drive circuit 3 that connects and the led array 4 that constitutes by several LED.
As shown in Figure 2, described electric power storage loop 2 comprises capacitor group 21 and the photocell circuit 22 that is connected between described dc charging circuit 1 and the described led drive circuit 3, and described photocell circuit 22 passes through the first resistance R d ground connection with described capacitor group 21 backs in parallel.Described photocell circuit 22 comprises photocell 22a, light switch S2 and the second resistance R c of series connection successively.As shown in the figure, described photocell circuit 22 can also comprise isolating diode D2, and the positive pole of described isolating diode D2 links to each other with described photocell 22a, negative pole links to each other with described dc charging circuit 1.This isolating diode D2 can avoid dc charging circuit 1 and photocell 22a mutual interference mutually.Because the utility model adopts capacitor group 21 to carry out electric power storage, because it works in 50 or 60 hertz, loss is little, and energy-conserving and environment-protective and weight are little.
Under the normal condition, by dc charging circuit 1 is 21 chargings of capacitor group, when urgent, can absorb the solar energy makeup energy by photocell 22a, the led array voltage instability of having avoided the charging circuit spread of voltage and having caused, thus the led array stabilized illumination made.
Preferably, described capacitor group comprises the capacitor of a plurality of 1F.Volume is big, and heat radiation better.
As shown in Figure 3, the led drive circuit 3 of present embodiment comprises unstable oscillation device 31, switching transistor 32 and inductance L 1.Described unstable oscillation device 31 is made of triode Q1, Q2 and peripheral circuit thereof and peripheral circuit R1～R6, C1～C2, the input of described unstable oscillation device 31 is connected with described electric power storage loop 2, output links to each other with the control end of described switching transistor 32, the hot end of the controlled end of described switching transistor 32 links to each other with described electric power storage loop 2, cold end is connected with an end of described inductance L 1, and the other end of described inductance L 1 connects described led array 4 and ground respectively.Aforementioned led drive circuit 3 can provide stable voltage for led array 4, guarantees its stabilized illumination under low-voltage.
Particularly, in the present embodiment, described switching transistor 32 can be PNP transistor Q3, and the base stage of this PNP transistor Q3 links to each other with the colelctor electrode of Q2, emitter stage links to each other with electric power storage loop 2, colelctor electrode passes through inductance L 1 ground connection.This PNP transistor Q3 has high dc gain and low collection is penetrated saturation voltage, thereby can obtain optimum efficiency.
As shown in Figure 4, described dc charging circuit 1 comprises current limliting reduction voltage circuit 11, diode rectifier circuit 12 and the filter circuit 13 that links to each other successively with electricity network.So the little charging interval of charging current long, the service life of improving capacitor group 21.Alternatively, be in series with a light emitting diode VD3 between described filter circuit 13 and the described diode rectifier circuit 12, be used to indicate this LED matrix whether to be in charged state.
When light switch S2 is closed, photocell is described capacitor group charging, and give high level signal of described led drive circuit by the capacitor group, make the unstable oscillation device that constitutes by triode Q1 and Q2 begin concussion, the colelctor electrode output square wave of triode Q2, thereby the break-make of gauge tap transistor Q3, when switching transistor Q3 conducting, inductance L 1 charging is when switching transistor Q3 ends, inductance L 1 discharges the energy of storage by the led array direction, thereby lights LED.This led drive circuit is simple in structure, drive under low-voltage, thereby guarantees the led array stabilized illumination.Need to prove that the charge rate of described inductance L 1 is greater than discharge rate, aforementioned current limliting reduction voltage circuit 11, diode rectifier circuit 12 and filter circuit 13 do not repeat them here for those skilled in the art know.
Claims (7)
1. LED lighting device, comprise dc charging circuit, electric power storage loop, led drive circuit that connects successively and the led array that constitutes by several LED, it is characterized in that: described electric power storage loop comprises capacitor group and the photocell circuit that is connected between described dc charging circuit and the described led drive circuit, described photocell circuit with after described capacitor group is in parallel by first resistance eutral grounding, described photocell circuit comprises photocell, light switch and second resistance of series connection successively.
2. LED lighting device according to claim 1, it is characterized in that: described led drive circuit comprises unstable oscillation device, switching transistor and inductance, the input of described unstable oscillation device is connected with described electric power storage loop, output links to each other with the control end of described switching transistor, the hot end of the controlled end of described switching transistor links to each other with described electric power storage loop, cold end is connected with an end of described inductance, and the other end of described inductance connects described led array and ground respectively.
3. LED lighting device according to claim 2 is characterized in that: described switching transistor is a PNP transistor.
4. LED lighting device according to claim 3 is characterized in that: described photocell circuit also comprises isolating diode, and the positive pole of described isolating diode links to each other with described photocell, and the negative pole of described isolating diode links to each other with described dc charging circuit.
5. according to each described LED lighting device of claim 1-4, it is characterized in that: described capacitor group comprises the capacitor of a plurality of 1F.
6. according to each described LED lighting device of claim 1-4, it is characterized in that: described dc charging circuit comprises current limliting reduction voltage circuit, diode rectifier circuit and the filter circuit that links to each other successively with electricity network.
7. LED lighting device according to claim 6 is characterized in that: be in series with a light emitting diode between described filter circuit and the described diode rectifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201886905U CN201672427U (en) | 2010-05-07 | 2010-05-07 | Led illuminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201886905U CN201672427U (en) | 2010-05-07 | 2010-05-07 | Led illuminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201672427U true CN201672427U (en) | 2010-12-15 |
Family
ID=43329839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201886905U Expired - Fee Related CN201672427U (en) | 2010-05-07 | 2010-05-07 | Led illuminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201672427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793383A (en) * | 2016-12-05 | 2017-05-31 | 成都小晓学教育咨询有限公司 | A kind of energy-conserving and environment-protective lighting device |
-
2010
- 2010-05-07 CN CN2010201886905U patent/CN201672427U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793383A (en) * | 2016-12-05 | 2017-05-31 | 成都小晓学教育咨询有限公司 | A kind of energy-conserving and environment-protective lighting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20130507 |