CN204887547U - LED portable lamp circuit - Google Patents
LED portable lamp circuit Download PDFInfo
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- CN204887547U CN204887547U CN201520475316.6U CN201520475316U CN204887547U CN 204887547 U CN204887547 U CN 204887547U CN 201520475316 U CN201520475316 U CN 201520475316U CN 204887547 U CN204887547 U CN 204887547U
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Abstract
The utility model discloses a LED portable lamp circuit, including resistance R1, electric capacity C1, triode Q1, key switch SW, diode ZD1 and emitting diode LED1, resistance R1 one end is connecting resistance R8 respectively, diode D1 negative pole and triode Q4 projecting pole, the resistance R1 other end is connecting resistance R2 respectively, triode Q4 base and diode D2 negative pole, anodal and the power VCC of diode D1 is connected respectively to diode D2 positive pole, key switch SW is connected respectively to the resistance R2 other end, electric capacity C1 and resistance R3. The utility model discloses LED portable lamp circuit adopts electric capacity C1 as energy -storage capacitor, can effectively reduce the condition that the switch leads to LED to burn out in the twinkling of an eye, and resistance R8 plays the partial pressure effect to LED1 in addition, and circuit structure is simple, and is small, with low costs, and stability is high, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of LED hand lamp, specifically a kind of LED hand lamp circuit.
Background technology
In recent years, the Chinese government had in succession put into effect a series of principles and policies and laws and regulations in new energy development, environmental protection and resources conservation, implemented a collection of key project such as " the golden sun ", " green illumination ", have received larger effect.LED is not owing to having ultraviolet and infrared ray in spectrum, both there is no heat, there is no radiation yet, belonged to typical green illumination light source, adopt the illuminating product of efficiency high, life-span long, safety and stable performance, the work of people, study, the condition of life and quality can be improved.Also because of like this, LED illumination has now become a new high-tech product with development prospect and influence power.Global energy is nervous, and the efficiency improving electrical equipment is effective method.Electric consumption on lighting occupies the total electricity consumption in the whole world 21%, if can improve the efficiency of electric consumption on lighting, effectively can alleviate energy shortage.How to improve the energy utilization rate of illuminator, extend the life-span of illuminator, and be green non-pollution? replacing incandescent lamp, fluorescent lamp, what does is the forth generation lighting of electricity-saving lamp? the answer that industry provides is exactly LED illumination lamp.LED illumination lumen per watt number can reach 120lm.Far above incandescent lamp and fluorescent lamp, the LED lamp bead life-span is 100,000 hours in addition, and green non-pollution.It is boundless that these advantages that LED illumination possesses determine its application prospect.The LED that is limited in LED illumination application has fixing forward voltage drop, and electric current also has the upper limit (operating current is the principal element affecting the LED life-span).Forward voltage drop on white light LEDs is generally 3-4V, LED light source directly can not can use utility grid voltage as general light source, it must be furnished with specialized voltages conversion equipment, the rated voltage and electric current that can meet driving LED are provided, LED just can be made normally to work, namely the special driving power of so-called LED.Existing a lot of hand lamp also starts to adopt LED illumination, but a lot of LED hand lamp volume is comparatively large, and internal circuit is complicated, and cost is high, and stability is low, easily burns LED in the moment of switch.
Utility model content
The purpose of this utility model is the LED hand lamp circuit providing a kind of volume little, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of LED hand lamp circuit, comprise resistance R1, electric capacity C1, triode Q1, key switch SW, diode ZD1 and LED 1, described resistance R1 one end is contact resistance R8 respectively, diode D1 negative pole and triode Q4 emitter, the resistance R1 other end is contact resistance R2 respectively, triode Q4 base stage and diode D2 negative pole, diode D2 positive pole connects diode D1 positive pole and power supply VCC respectively, the described resistance R2 other end connects key switch SW respectively, electric capacity C1 and resistance R3, the key switch SW other end connects diode D3 negative pole respectively, electric capacity C2, resistance R4 and triode Q1 base stage, the triode Q1 collector electrode contact resistance R3 other end, triode Q1 emitter connects the electric capacity C1 other end respectively, the electric capacity C2 other end and the resistance R4 other end ground connection, described diode D3 cathode connecting diode ZD1 positive pole, diode ZD1 negative pole is connecting triode Q4 collector electrode and resistance R6 respectively, the resistance R6 other end connects earth resistance R5 and triode Q3 base stage respectively, triode Q3 collector electrode contact resistance R7, resistance R7 other end connecting luminous diode LED1 negative pole, the LED 1 positive pole contact resistance R8 other end.
As further program of the utility model: described diode ZD1 is voltage stabilizing didoe.
As the utility model further scheme: described power supply VCC voltage is 9V.
Compared with prior art, the beneficial effects of the utility model are: the utility model LED hand lamp circuit adopts electric capacity C1 as storage capacitor, effectively can reduce the situation that switching moments causes LED to burn, resistance R8 plays dividing potential drop effect to LED1 in addition, circuit structure is simple, and volume is little, and cost is low, stability is high, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED hand lamp circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of LED hand lamp circuit, comprise resistance R1, electric capacity C1, triode Q1, key switch SW, diode ZD1 and LED 1, resistance R1 one end is contact resistance R8 respectively, diode D1 negative pole and triode Q4 emitter, the resistance R1 other end is contact resistance R2 respectively, triode Q4 base stage and diode D2 negative pole, diode D2 positive pole connects diode D1 positive pole and power supply VCC respectively, the resistance R2 other end connects key switch SW respectively, electric capacity C1 and resistance R3, the key switch SW other end connects diode D3 negative pole respectively, electric capacity C2, resistance R4 and triode Q1 base stage, the triode Q1 collector electrode contact resistance R3 other end, triode Q1 emitter connects the electric capacity C1 other end respectively, the electric capacity C2 other end and the resistance R4 other end ground connection, diode D3 cathode connecting diode ZD1 positive pole, diode ZD1 negative pole is connecting triode Q4 collector electrode and resistance R6 respectively, the resistance R6 other end connects earth resistance R5 and triode Q3 base stage respectively, triode Q3 collector electrode contact resistance R7, resistance R7 other end connecting luminous diode LED1 negative pole, the LED 1 positive pole contact resistance R8 other end.
Diode ZD1 is voltage stabilizing didoe.
Power supply VCC voltage is 9V.
Operation principle of the present utility model is: refer to Fig. 1, ignition: when usual LED 1 does not work: electric capacity C1 passes through R1, R2, R3 charges, now LED 1 does not work as holding state, then unclamp when pressing SW during use, the positive pole of C1 is shorted to the b pole of Q1, and the negative pole of C1 connects the e pole of Q1, because C1 both end voltage can not be suddenlyd change, therefore Q1 enters saturation condition very greatly very soon because of emitter junction voltage, after Q1 is saturated, its collector potential is almost 0V, Q4 emitter voltage positively biased, so Q4 is rapid saturation conduction also, the collector potential of Q4 is made to be almost electric capacity C1 both end voltage, this voltage produces two effects: one is make voltage stabilizing didoe ZD1 (voltage stabilizing value is about 2.5V) reverse breakdown, D3 forward conduction, residual voltage adds to the base stage of Q1 afterwards, Q1 is made to remain saturated, realize self-insurance, two is this voltage through the dividing potential drop of R6 and R5 adds to the base stage of Q3, makes Q3 also saturation conduction, so LED1 has electric current to flow through and luminous, LED 1 starts illumination.Q1 maintains saturation conduction due to self-insurance. and its collector potential is almost 0V, then C1 is by R3, electric discharge and make its both end voltage be 0V; Closing process: if click SW again and unclamp under illumination condition, because C1 both end voltage is 0V, make the b-e junction voltage of Q1 be that 0V ends, the collector electrode of Q1 becomes high potential because Q1 ends, and the b pole of Q4 is also because the dividing potential drop of R1, R2 is high potential, the b-e knot of Q4 is because of 0V bias off, the collector electrode of Q4 loses voltage makes Q3 end, and LED1 no current passes through, and extinguishes, now C1 is again by R1, R2, R3 charging, for next action is prepared.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a LED hand lamp circuit, comprise resistance R1, electric capacity C1, triode Q1, key switch SW, diode ZD1 and LED 1, it is characterized in that, described resistance R1 one end is contact resistance R8 respectively, diode D1 negative pole and triode Q4 emitter, the resistance R1 other end is contact resistance R2 respectively, triode Q4 base stage and diode D2 negative pole, diode D2 positive pole connects diode D1 positive pole and power supply VCC respectively, the described resistance R2 other end connects key switch SW respectively, electric capacity C1 and resistance R3, the key switch SW other end connects diode D3 negative pole respectively, electric capacity C2, resistance R4 and triode Q1 base stage, the triode Q1 collector electrode contact resistance R3 other end, triode Q1 emitter connects the electric capacity C1 other end respectively, the electric capacity C2 other end and the resistance R4 other end ground connection, described diode D3 cathode connecting diode ZD1 positive pole, diode ZD1 negative pole is connecting triode Q4 collector electrode and resistance R6 respectively, the resistance R6 other end connects earth resistance R5 and triode Q3 base stage respectively, triode Q3 collector electrode contact resistance R7, resistance R7 other end connecting luminous diode LED1 negative pole, the LED 1 positive pole contact resistance R8 other end.
2. LED hand lamp circuit according to claim 1, is characterized in that, described diode ZD1 is voltage stabilizing didoe.
3. LED hand lamp circuit according to claim 1, is characterized in that, described power supply VCC voltage is 9V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475316.6U CN204887547U (en) | 2015-06-30 | 2015-06-30 | LED portable lamp circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475316.6U CN204887547U (en) | 2015-06-30 | 2015-06-30 | LED portable lamp circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204887547U true CN204887547U (en) | 2015-12-16 |
Family
ID=54831864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520475316.6U Expired - Fee Related CN204887547U (en) | 2015-06-30 | 2015-06-30 | LED portable lamp circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204887547U (en) |
-
2015
- 2015-06-30 CN CN201520475316.6U patent/CN204887547U/en not_active Expired - Fee Related
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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: 20151216 Termination date: 20160630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |