CN105848369A - Fade-on fade-off LED lighting lamp with adjustable luminance - Google Patents
Fade-on fade-off LED lighting lamp with adjustable luminance Download PDFInfo
- Publication number
- CN105848369A CN105848369A CN201610410291.0A CN201610410291A CN105848369A CN 105848369 A CN105848369 A CN 105848369A CN 201610410291 A CN201610410291 A CN 201610410291A CN 105848369 A CN105848369 A CN 105848369A
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- circuit
- emitting diode
- white light
- bright white
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a fade-on fade-off LED lighting lamp with adjustable luminance. The lamp is characterized by comprising a 5V direct current power supply, a rectangular pulse generator and pulse width modulating circuit, and a light emitting diode driving circuit, wherein the type of a time-base circuit IC1 in the rectangular pulse generator and pulse width modulating circuit is NE555. In the dark night, eyes are unconformable when the lighting lamp is turned on to full bright or turned off by sudden outage, thus being inconvenient for the study and rest of people, and also having very disadvantageous affect on the human eyes. Is there a possibility to design a lighting lamp which can light gradually when turning on the switch of the lighting lamp, and can go out slowly when the lighting lamp is turned off If the working mode can be achieved, the physiological requirement of the human eyes can be met as the human eyes are no longer stimulated by strong light in the night. The fade-on fade-off LED lighting lamp adopts the pulse width modulating circuit which can adjust the luminance of the light emitting diode, thus being an energy-saving, economical and practical technical scheme.
Description
Technical field
The invention belongs to application of electronic technology field, relate to that a kind of brightness is adjustable the brightest fades off LED illumination lamp.
Background technology
Common illuminating lamp or delay illuminating lamp typical mode of operation be: or illuminating lamp opens all light, or illumination lamp ignition works automatic distinguishing after a period of time, and the brightness between illumination lamp ignition to extinguishing does not has transient state.Between black night, all light opened by illuminating lamp or suddenly power-off is extinguished, and moment eyes are far from suitable, not only the study of inconvenient people or rest, and the eyes of people are had very adverse effect.One illuminating lamp when opening luminous lamp switch can be designed can light at leisure, when closing illuminating lamp for extinguish at leisure.If such mode of operation can be realized, one be night people eyes be no longer influenced by high light stimulate, meet the physiological requirement of people's eyes.
Brightness of the present invention is adjustable, and the brightest fade off that core parts in LED illumination lamp circuit select is time base circuit, and it uses pulse width modulation circuit, the brightness of its scalable LED, is a kind of energy-conservation, economic, practical technical scheme.
Brightness of the present invention described further below is adjustable the brightest fades off that LED illumination lamp is involved necessary in implementation process, guardian technique content.
Summary of the invention
Goal of the invention and beneficial effect: between black night, all light opened by illuminating lamp or suddenly power-off is extinguished, and moment eyes are far from suitable, the not only study of inconvenient people or rest, and the eyes of people are had very adverse effect.One illuminating lamp when opening luminous lamp switch can be designed can light at leisure, when closing illuminating lamp for extinguish at leisure.If such mode of operation can be realized, one be night people eyes be no longer influenced by high light stimulate, meet the physiological requirement of people's eyes.Brightness of the present invention is adjustable, and the brightest fade off that core parts in LED illumination lamp circuit select is time base circuit, and it uses pulse width modulation circuit, the brightness of its scalable LED, is a kind of energy-conservation, economic, practical technical scheme.
Circuit operation principle: brightness of the present invention is adjustable the brightest fades off LED illumination lamp, time base circuit IC1 be connected into the adjustable squarer of dutycycle, pulse frequency about 100Hz, and dutycycle size is regulated by linear potentiometer RP.The electric capacity C1 charging interval is mainly determined by the time constant of resistance R1, linear potentiometer RP and the top half of resistance R2 and electric capacity C1, and discharge time is then determined by the time constant of the latter half of linear potentiometer RP, resistance R2 and electric capacity C1.It is electrically charged period at electric capacity C1, because the 2nd foot of time base circuit IC1 is in low level, time base circuit IC1 set, between the 3rd foot output high period of time base circuit IC1, is driven super bright white light-emitting diode LED1～LED6 luminous by enhancement mode N-channel field effect transistor VT1.
In electric capacity C1 discharge time, time base circuit IC1 is in reset state, and during the 3rd foot output low level of time base circuit IC1, enhancement mode N-channel field effect transistor VT1 is ended, and super bright white light-emitting diode LED1～LED6 no current pass through.
When linear potentiometer RP sliding end is positioned at previous position, the electric capacity C1 charging interval shortens, discharge time lengthens, so less by the average current of super bright white light-emitting diode LED1～LED6 in one cycle of pulse, super bright white light-emitting diode LED1～LED6 luminosity are the least.When linear potentiometer RP sliding end moves down, the electric capacity C1 charging interval is elongated, discharge time reduces, the biggest by the average current of LED 1～LED6 in one cycle of pulse, and super bright white light-emitting diode LED1～LED6 luminosity become big.So linear adjustment potentiometer RP just can change the brightness that super bright white light-emitting diode LED1～LED6 is luminous.
Technical characteristic: brightness is adjustable the brightest fades off LED illumination lamp, and it includes 5V DC source, squarer and pulse-width modulation circuit, LED driving circuit, it is characterised in that:
Squarer and pulse-width modulation circuit: it is by time base circuit IC1, resistance R1, linear potentiometer RP, resistance R2, switching diode D1 and electric capacity C1 composition, the model that time base circuit IC1 selects is NE555, 4th foot of time base circuit IC1 and the 8th foot connection circuit positive pole VCC, 7th foot of time base circuit IC1 connects positive pole and the sliding end of linear potentiometer RP of switching diode D1, resistance R1 connection circuit positive pole VCC is passed through in one end of linear potentiometer RP, 2nd foot of time base circuit IC1 and the 6th foot connect the negative pole of switching diode D1, one end of resistance R2 and one end of electric capacity C1, the other end of resistance R2 connects the other end of linear potentiometer RP, 1st foot of time base circuit IC1 and the other end connection circuit ground GND of electric capacity C1；
nullLED driving circuit: it is by switching diode D2、Electrochemical capacitor C2、Resistance R3、Enhancement mode N-channel field effect transistor VT1、6 super bright white light-emitting diode LED1～LED6 compositions，3rd foot of time base circuit IC1 connects the positive pole of switching diode D2，The negative pole of switching diode D2 connects grid and the positive pole of electrochemical capacitor C2 of enhancement mode N-channel field effect transistor VT1 by resistance R3，Super bright white light-emitting diode LED1～LED2 mutually contacts，Super bright white light-emitting diode LED3～LED4 mutually contacts，Super bright white light-emitting diode LED5～LED6 mutually contacts，The positive pole of super bright white light-emitting diode LED1 and the positive pole connection circuit positive pole VCC of the positive pole of super bright white light-emitting diode LED3 and super bright white light-emitting diode LED5，The negative pole of super bright white light-emitting diode LED2 and the negative pole of the negative pole of super bright white light-emitting diode LED4 and super bright white light-emitting diode LED6 connect the drain electrode of enhancement mode N-channel field effect transistor VT1，The negative pole of electrochemical capacitor C2 and the source electrode connection circuit ground GND of enhancement mode N-channel field effect transistor VT1；
5V DC power anode is connected with circuit anode VCC, and 5V DC power cathode is connected with circuit ground GND.
Accompanying drawing explanation
Fig. 1 is the brightness the brightest adjustable circuit fundamental diagram fading off one embodiment of LED illumination lamp that the present invention provides.
Detailed description of the invention
The brightest LED illumination lamp circuit fundamental diagram and accompanying drawing explanation is faded off according to brightness shown in the drawings is adjustable, and according to annexation between components and parts in each several part circuit described in summary of the invention, and the components and parts technical parameter described in embodiment requires and circuit production main points carry out enforcement and can realize the present invention, is further described the correlation technique of the present invention below in conjunction with embodiment.
The selection of components and parts and technical parameter thereof
IC1 is time base circuit, and the model of selection is NE555 or LM555, and packing forms is 8 pins of dual inline type；Each foot function: the 1st foot is circuit ground GND；2nd foot is for triggering end；3rd foot outfan；4th pin preset end；5th foot is for controlling voltage；6th foot thresholding (threshold value)；7th foot is discharge end；8th foot is positive source；
D1～D2 is switching diode, and the model of selection is 1N4148；
Resistance R1 is metalfilmresistor, and its resistance is 3K Ω, and resistance R2 is metalfilmresistor, and its resistance is 3.6K Ω, and resistance R3 is metalfilmresistor, and its resistance is 220K Ω；
RP is linear potentiometer, and its resistance is 150K Ω；
C1 is electric capacity, and available leaded multilayer ceramic capacitor or ceramic disc capacitor, its capacity is 0.1 μ F/40V；C2 is electrochemical capacitor, and its capacity is 220 μ F/16V；
VT1 is enhancement mode N-channel field effect transistor, and the model of selection is IRFZ22；
LED1～LED6 is super bright white light-emitting diode, selects 6 super bright white light-emitting diodes, a diameter of ￠ 5, requires that technical parameter is consistent.
Circuit production main points and circuit debugging
Because the brightness the brightest adjustable circuit structure fading off LED illumination lamp is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation in accompanying drawing is welded to specifications, physical connection line and welding quality are after going through correctly, and the circuit of the present invention is substantially made without any debugging and can normally work；
In circuit debugging, 5V DC source can first replace with the adjustable D. C regulated of output electric current >=0.3A, if finding, output load current does not reaches 160mA, should first detect resistance R1, resistance R2 resistance whether correct, next to that the resistance of resistance R2 is suitably reduced；
Enhancement mode N-channel field effect transistor is in the on-state, between source electrode and the drain electrode of enhancement mode N-channel field effect transistor, pressure drop is the least, its pressure drop is the most negligible, and drive power the biggest, if the brightness of super bright white light-emitting diode is inadequate, can to specifications on accompanying drawing 1 circuit fundamental diagram the connected mode of super bright white light-emitting diode increase the quantity of super bright white light-emitting diode, super bright white light-emitting diode rises to 60.
The circuit structure design of the present invention, components' placement; and its face shaping and size etc. thereof are not the key technology of the present invention; it it is not claimed guardian technique content; because not affecting the realization of specific implementation process of the present invention and goal of the invention, therefore illustrate the most one by one.
Claims (1)
1. brightness is adjustable the brightest fades off a LED illumination lamp, and it includes 5V DC source, rectangular pulse
Generator and pulse-width modulation circuit, LED driving circuit, it is characterised in that:
Described squarer and pulse-width modulation circuit are by time base circuit IC1, resistance R1, linearly electricity
Position device RP, resistance R2, switching diode D1 and electric capacity C1 composition, the model that time base circuit IC1 selects is
4th foot of NE555, time base circuit IC1 and the 8th foot connection circuit positive pole VCC, the 7th of time base circuit IC1
Foot connects positive pole and the sliding end of linear potentiometer RP of switching diode D1, and one end of linear potentiometer RP leads to
Crossing resistance R1 connection circuit positive pole VCC, the 2nd foot of time base circuit IC1 and the 6th foot connect switching diode D1's
Negative pole, one end of resistance R2 and one end of electric capacity C1, the other end of resistance R2 connects linear potentiometer RP's
The other end, the 1st foot of time base circuit IC1 and the other end connection circuit ground GND of electric capacity C1；
Described LED driving circuit is by switching diode D2, electrochemical capacitor C2, resistance R3, enhancing
Type N-channel field effect transistor VT1,6 super bright white light-emitting diode LED1～LED6 compositions, Shi Ji electricity
3rd foot of road IC1 connects the positive pole of switching diode D2, and the negative pole of switching diode D2 is connect by resistance R3
The grid of enhancement mode N-channel field effect transistor VT1 and the positive pole of electrochemical capacitor C2, super bright white luminous two poles
Pipe LED1～LED2 mutually contacts, and super bright white light-emitting diode LED3～LED4 mutually contacts, superelevation
Brilliant white LED 5～LED6 is mutually contacted, the positive pole of super bright white light-emitting diode LED1
Connect with the positive pole of the positive pole of super bright white light-emitting diode LED3 and super bright white light-emitting diode LED5
Circuit anode VCC, the negative pole of super bright white light-emitting diode LED2 and super bright white light-emitting diode
The negative pole of LED4 and the negative pole of super bright white light-emitting diode LED6 connect enhancement mode N-channel field effect transistor VT1
Drain electrode, the source electrode connection circuit ground GND of the negative pole of electrochemical capacitor C2 and enhancement mode N-channel field effect transistor VT1；
Described 5V DC power anode is connected with circuit anode VCC, 5V DC power cathode and circuit ground
GND is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410291.0A CN105848369A (en) | 2016-06-02 | 2016-06-02 | Fade-on fade-off LED lighting lamp with adjustable luminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410291.0A CN105848369A (en) | 2016-06-02 | 2016-06-02 | Fade-on fade-off LED lighting lamp with adjustable luminance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105848369A true CN105848369A (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610410291.0A Pending CN105848369A (en) | 2016-06-02 | 2016-06-02 | Fade-on fade-off LED lighting lamp with adjustable luminance |
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| Country | Link |
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| CN (1) | CN105848369A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108891511A (en) * | 2018-07-11 | 2018-11-27 | 黄月华 | The microwave induced formula burglar alarm of motorcycle |
| CN109900063A (en) * | 2019-04-04 | 2019-06-18 | 吴建堂 | Touch refrigerator is not closed the door alarm device |
| US10548193B1 (en) | 2019-06-28 | 2020-01-28 | Haier Us Appliance Solutions, Inc. | Appliance illumination with zero standby power |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006054362A (en) * | 2004-08-13 | 2006-02-23 | Sanyo Electric Co Ltd | Led control circuit |
| CN204634115U (en) * | 2015-05-21 | 2015-09-09 | 周芸 | LED dimming electric torch |
| CN105101578A (en) * | 2015-09-11 | 2015-11-25 | 黄宇嵩 | Breathing type led lamp |
| CN105578662A (en) * | 2016-03-01 | 2016-05-11 | 黄月华 | Pedestrian induction time-delay dimming LED street lamp in landscape area |
| CN205666996U (en) * | 2016-06-02 | 2016-10-26 | 吴建堂 | Luminance adjustable is bright LED light that gradually goes out gradually |
-
2016
- 2016-06-02 CN CN201610410291.0A patent/CN105848369A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006054362A (en) * | 2004-08-13 | 2006-02-23 | Sanyo Electric Co Ltd | Led control circuit |
| CN204634115U (en) * | 2015-05-21 | 2015-09-09 | 周芸 | LED dimming electric torch |
| CN105101578A (en) * | 2015-09-11 | 2015-11-25 | 黄宇嵩 | Breathing type led lamp |
| CN105578662A (en) * | 2016-03-01 | 2016-05-11 | 黄月华 | Pedestrian induction time-delay dimming LED street lamp in landscape area |
| CN205666996U (en) * | 2016-06-02 | 2016-10-26 | 吴建堂 | Luminance adjustable is bright LED light that gradually goes out gradually |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108891511A (en) * | 2018-07-11 | 2018-11-27 | 黄月华 | The microwave induced formula burglar alarm of motorcycle |
| CN109900063A (en) * | 2019-04-04 | 2019-06-18 | 吴建堂 | Touch refrigerator is not closed the door alarm device |
| US10548193B1 (en) | 2019-06-28 | 2020-01-28 | Haier Us Appliance Solutions, Inc. | Appliance illumination with zero standby power |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20160810 |