CN101977473A - Indoor light-emitting diode (LED) constant current illuminating lamp - Google Patents
Indoor light-emitting diode (LED) constant current illuminating lamp Download PDFInfo
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- CN101977473A CN101977473A CN2010105461059A CN201010546105A CN101977473A CN 101977473 A CN101977473 A CN 101977473A CN 2010105461059 A CN2010105461059 A CN 2010105461059A CN 201010546105 A CN201010546105 A CN 201010546105A CN 101977473 A CN101977473 A CN 101977473A
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- filter capacitor
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Abstract
The invention relates to an indoor light-emitting diode (LED) constant current illuminating lamp, belonging to the technical field of electronic application and comprising a white light LED set and a power supply circuit, wherein the power supply circuit comprises a fuse tube, a rectifying whole bridge, a filter capacitor, a three-end adjustable voltage stabilizer and a sampling resistor; the three-end adjustable voltage stabilizer and the sampling resistor form a constant-current source; the positive electrode of the white light LED set is connected with one end of the sampling resistor and an ADJ pin of the three-end adjustable voltage stabilizer, and the negative electrode of the white light LED set is connected with the power supply negative electrode of the rectifying whole bridge output and the negative electrode of the filter capacitor; an IN pin of the three-end adjustable voltage stabilizer is connected with the positive electrode of the power supply output by the rectifying whole bridge, and an OUT pin of the three-end adjustable voltage stabilizer is connected with the other end of the sampling resistor; the positive electrode of the filter capacitor is connected with the positive electrode of the power supply output by rectifying whole bridge; one alternating-current input end of the rectifying whole bridge is directly connected with mains electricity, and the other alternating-current input end of the rectifying whole bridge is connected with the mains electricity by the fuse tube. The indoor LED constant current illuminating lamp reduces the light attenuation of an LED and prolongs the service life of the LED.
Description
Technical field
The present invention relates to a kind of illuminating lamp, particularly relate to a kind of LED constant current illuminating lamp of indoor alternating current 220V power supply, belong to the electrical application technology field.
Background technology
LED is used widely at civil area in recent years owing to numerous advantages such as environmental protection, life-span length, photoelectric efficiency height.At present, the supply power mode of the indoor low-power LED illuminating lamp that sell the market, be the capacitive reactance characteristic of utilizing electric capacity mostly, after adopting capacity voltage dropping circuit step-down, the QZ rectification of rectification full-bridge and the filter capacitor C2 filtering that the alternating current 220V civil power forms through current-limiting resistance R1 current limliting, by resistance R 2 and capacitor C 1, directly give the method for many white light LEDs light-emitting diode power supplies of series connection, as shown in Figure 1.It is zero load overvoltage, the rush of current that causes that this supply power mode exists the capacitive reactance of energized moment electric capacity.Because the ability of LED Antisurge current is poor, the operating current of every LED is standard 20mA, but the civil power fluctuation ratio is bigger, when if civil power is 240V, the operating current of LED is just well beyond running current, the brightness of LED is just bright inadequately when being lower than 220V, long-term like this current fluctuation, very easily cause the LED light-emitting diode to damage, though can reach 50,000 hours the useful life of LED in theory, but in actual application because the design of driving power is improper, make the LED light decay obviously, premature damage.
Summary of the invention
The object of the present invention is to provide a kind of indoor LED constant current illuminating lamp, can provide constant current, overcome the deficiency of existing LED illuminating lamp to the LED light-emitting diode.
Technical scheme of the present invention is: the indoor LED constant current of this kind illuminating lamp, comprise white light LEDs group and power circuit, and it is characterized in that described power circuit comprises cartridge fuse, rectification full-bridge, filter capacitor, three-terminal voltage regulator and sample resistance; Described three-terminal voltage regulator and sample resistance are formed a constant-current source; The ADJ pin of the positive pole of white light LEDs group and sample resistance one end, three-terminal voltage regulator joins; The power cathode of the negative pole of white light LEDs group and the output of rectification full-bridge, the negative pole of filter capacitor join; The positive source of the IN pin of three-terminal voltage regulator and the output of rectification full-bridge joins, and the OUT pin of three-terminal voltage regulator and the other end of sample resistance join; The positive source of the positive pole of filter capacitor and the output of rectification full-bridge joins; An ac input end of rectification full-bridge directly joins with civil power, and another ac input end passes through cartridge fuse and civil power joins.
Described white light LEDs group is composed in series by 80-92 white light emitting diodes.
Good effect of the present invention is: constitute constant-current source by three-terminal voltage regulator IC and sample resistance R and be the power supply of white light LEDs group, thereby reduced the LED light decay, prolonged useful life of LED.
Description of drawings
Fig. 1 is the indoor LED lighting lamp circuit figure of prior art;
Fig. 2 is the indoor LED constant current of the present invention lighting lamp circuit figure.
Embodiment
As shown in Figure 2, indoor LED constant current illuminating lamp comprises white light LEDs group 1 and power circuit.Power circuit is made up of cartridge fuse BX, rectification full-bridge QZ, filter capacitor C, LM317 three-terminal voltage regulator IC, sample resistance R.
Described white light LEDs group 1 is composed in series by 80-92 white light emitting diodes.The end of the positive pole of white light LEDs group 1 and sample resistance R wherein, the ADJ pin of LM317 three-terminal voltage regulator IC joins, the power cathode of the negative pole of white light LEDs group 1 and rectification full-bridge QZ output, the negative pole of filter capacitor C joins, the positive source of the IN pin of LM317 three-terminal voltage regulator IC and rectification full-bridge QZ output joins, the OUT pin of LM317 three-terminal voltage regulator IC and the other end of sample resistance R join, the positive source of the positive pole of filter capacitor C and rectification full-bridge QZ output joins, the ac input end of rectification full-bridge QZ directly joins with civil power, and another ac input end passes through cartridge fuse BX and civil power joins.
The alternating current 220V civil power carries out full-wave bridge rectifier through 0.5A cartridge fuse, rectification full-bridge, and the rectification full-bridge is 1A/1000V, and filter capacitor is filtered into level and smooth direct current with the direct current of pulsation, and filter capacitor is 20 μ F/450V electrochemical capacitors.Constant-current source circuit constitutes a constant-current source by LM317 three-terminal voltage regulator IC and sample resistance R; LM317 three-terminal voltage regulator IC has output short-circuit, overcurrent, overtemperature protection and adjusts pipe safety operation area defencive function; the radiator of joining proper area, load current can reach 1.5A.Because LM317 three-terminal voltage regulator IC has the 1.25V voltage of benchmark, this voltage has the voltage stabilizing measure in LM317 three-terminal voltage regulator IC the inside, so can remain unchanged, this voltage is between the ADJ pin of the OUT pin of LM317 three-terminal voltage regulator IC and LM317 three-terminal voltage regulator IC at the two ends of sample resistance R just, resistance value is certain, voltage also is certain, is exactly invariable so flow through the electric current of resistance R, its constant current value I=1.25 (V)/R (Ω).Actual test, R value 63 Ω, when electric main changed between 190V-240V, the current stabilization that flows through LED was at 20mA.White light LEDs group 1 is luminous a group that 80-92 white light emitting diodes are composed in series, if will increase light-source brightness and power output, can carry out parallel connection with a plurality of luminous group.
Claims (2)
1. an indoor LED constant current illuminating lamp comprises white light LEDs group and power circuit, it is characterized in that described power circuit comprises cartridge fuse, rectification full-bridge, filter capacitor, three-terminal voltage regulator and sample resistance; Described three-terminal voltage regulator and sample resistance are formed a constant-current source; The ADJ pin of the positive pole of white light LEDs group and sample resistance one end, three-terminal voltage regulator joins; The power cathode of the negative pole of white light LEDs group and the output of rectification full-bridge, the negative pole of filter capacitor join; The positive source of the IN pin of three-terminal voltage regulator and the output of rectification full-bridge joins, and the OUT pin of three-terminal voltage regulator and the other end of sample resistance join; The positive source of the positive pole of filter capacitor and the output of rectification full-bridge joins; An ac input end of rectification full-bridge directly joins with civil power, and another ac input end passes through cartridge fuse and civil power joins.
2. indoor LED constant current illuminating lamp as claimed in claim 1 is characterized in that, described white light LEDs group is composed in series by 80-92 white light emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105461059A CN101977473A (en) | 2010-11-16 | 2010-11-16 | Indoor light-emitting diode (LED) constant current illuminating lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105461059A CN101977473A (en) | 2010-11-16 | 2010-11-16 | Indoor light-emitting diode (LED) constant current illuminating lamp |
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| CN101977473A true CN101977473A (en) | 2011-02-16 |
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| CN2010105461059A Pending CN101977473A (en) | 2010-11-16 | 2010-11-16 | Indoor light-emitting diode (LED) constant current illuminating lamp |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486479A (en) * | 2013-09-25 | 2014-01-01 | 天津金玛光电有限公司 | Integrated strip source |
| CN103517523A (en) * | 2013-09-25 | 2014-01-15 | 天津金玛光电有限公司 | High-voltage constant-current drive circuit and LED light source with same |
| CN103561525A (en) * | 2013-11-18 | 2014-02-05 | 北京格林曼光电科技有限公司 | Optical communication device based on white light LED illumination |
| CN104093241A (en) * | 2014-06-30 | 2014-10-08 | 扬州新思路光电科技有限公司 | Led constant current driver |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201563058U (en) * | 2009-11-24 | 2010-08-25 | 山东中烟工业公司青州卷烟厂 | Direct-current voltage-stabilizing supply unit |
| CN201851938U (en) * | 2010-11-16 | 2011-06-01 | 山东华盈电力能源发展有限公司 | Indoor LED (light-emitting diode) constant current lighting lamp |
-
2010
- 2010-11-16 CN CN2010105461059A patent/CN101977473A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201563058U (en) * | 2009-11-24 | 2010-08-25 | 山东中烟工业公司青州卷烟厂 | Direct-current voltage-stabilizing supply unit |
| CN201851938U (en) * | 2010-11-16 | 2011-06-01 | 山东华盈电力能源发展有限公司 | Indoor LED (light-emitting diode) constant current lighting lamp |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486479A (en) * | 2013-09-25 | 2014-01-01 | 天津金玛光电有限公司 | Integrated strip source |
| CN103517523A (en) * | 2013-09-25 | 2014-01-15 | 天津金玛光电有限公司 | High-voltage constant-current drive circuit and LED light source with same |
| CN103561525A (en) * | 2013-11-18 | 2014-02-05 | 北京格林曼光电科技有限公司 | Optical communication device based on white light LED illumination |
| CN104093241A (en) * | 2014-06-30 | 2014-10-08 | 扬州新思路光电科技有限公司 | Led constant current driver |
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Owner name: FANG LIN Free format text: FORMER OWNER: SHANDONG HUAYING ELECTRIC POWER DEVELOPMENT CO., LTD. Effective date: 20110708 Owner name: LU HUISHUI |
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Inventor after: Fang Lin Inventor after: Lu Huishui Inventor before: Fang Lin Inventor before: Lu Huishui Inventor before: Li Yundong |
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Free format text: CORRECT: ADDRESS; FROM: 250100 ROOM 508, BUILDING 2, OVERSEAS STUDENTS VENTURE PARK, NO. 19, HUANENG ROAD, LICHENG DISTRICT, JI NAN CITY, SHANDONG PROVINCE TO: 250011 NO. 401, UNIT 1, BUILDING 42, XIAOYUANZHUANG, LIXIA DISTRICT, JI NAN CITY, SHANDONG PROVINCE Free format text: CORRECT: INVENTOR; FROM: FANG LIN LU HUISHUI LI YUNDONG TO: FANG LIN LU HUISHUI |
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Effective date of registration: 20110708 Address after: Lixia District, Shandong city of Ji'nan Province, a small village 250011 building 42, unit 1, No. 401 Applicant after: Fang Lin Co-applicant after: Lu Huishui Address before: 508, room 2, building 19, Pioneer Park, No. 250100 Huaneng Road, Licheng District, Shandong, Ji'nan Applicant before: Shandong Huaying Electric Power Development Co., Ltd. |
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Application publication date: 20110216 |