CN102762007A - LED lamp and LED switch control device - Google Patents
LED lamp and LED switch control device Download PDFInfo
- Publication number
- CN102762007A CN102762007A CN 201110108835 CN201110108835A CN102762007A CN 102762007 A CN102762007 A CN 102762007A CN 201110108835 CN201110108835 CN 201110108835 CN 201110108835 A CN201110108835 A CN 201110108835A CN 102762007 A CN102762007 A CN 102762007A
- Authority
- CN
- China
- Prior art keywords
- switch
- led
- semiconductor
- oxide
- type metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED lamp and an LED switch control device. The LED switch control device comprises a switch power source, a switch, a second P-type MOS (metal oxide semiconductor) tube and a third capacitor. The switch is connected with the switch power source, the second P-type MOS tube is connected with the switch in parallel, and a drain of the second P-type MOS tube is connected with an input end of the switch power source. At least one LED lamps are arranged between the drain of the second P-type MOS tube and the input end of the switch power source. The third capacitor is connected with the switch in series, and the end of the third capacitor, connected with the switch, is connected with a grid of the second P-type MOS tube. The LED switch control device can slowly control luminance of the LED lamps turned on or off, uncomfortableness of users turning lamps on and off is greatly alleviated, and the service lives of the LED lamps are prolonged.
Description
Technical field
The invention belongs to lighting technical field, relate in particular to a kind of LED light fixture and LED switch controlling device.
Background technology
Along with the continuous development of lighting technology, the requirement of user's illumination functions of the equipments is also increasingly high.
Light-emitting diode (Light Emitting Diode, LED) light source is a kind of luminescent device of low-voltage dc constant current power supply, the main constant current switch power supply that uses comes driving LED work in the design.
In the driving power of LED light fixture of the prior art; When turning on light and turn off the light, because the charging and the discharge of big electric capacity in the LED current supply circuit, the LED two ends can produce peak voltage and electric current; And then cause taking place scintillation; During extreme case, above-mentioned peak voltage and electric current also might puncture LED, have shortened the useful life of LED light fixture.
And the flicker that takes place when under the situation of dark, turning on light and turning off the light can stimulate the eyes of human body, brings great sense of discomfort to the user.
Brightness situation when how to control the LED lamp switch slowly, the sense of discomfort when reducing the subscriber switch lamp is one of direction of lighting technical field research the useful life of prolongation LED lamp.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of LED light fixture and LED switch controlling device, the brightness situation when being intended to control the LED lamp switch slowly, the sense of discomfort when reducing the subscriber switch lamp, the useful life of prolongation LED lamp.
The present invention is achieved in that a kind of LED switch controlling device, and said device comprises Switching Power Supply, and said Switching Power Supply comprises input, and said device also comprises a switch, and said switch connects said Switching Power Supply,
Said device also comprises one the 2nd P type metal-oxide-semiconductor; Said the 2nd P type metal-oxide-semiconductor and said switch in parallel; The drain electrode of said the 2nd P type metal-oxide-semiconductor connects the input of said Switching Power Supply, and is provided with the LED lamp of at least one between the input of the drain electrode of said the 2nd P type metal-oxide-semiconductor and said Switching Power Supply;
Said device also comprises the 3rd electric capacity, and said the 3rd electric capacity is connected with said switch, and said the 3rd electric capacity end that connects said switch also connects the grid of said the 2nd P type metal-oxide-semiconductor.
Wherein, be in series with second resistance between the input of said switch and said Switching Power Supply.
Wherein, said device also comprises the 3rd resistance, said the 3rd electric capacity of said the 3rd resistance parallel connection, and said the 3rd resistance and the said second resistance said switch both sides of living apart.
Wherein, be in series with the 4th resistance between the grid of said the 3rd electric capacity and said the 2nd P type metal-oxide-semiconductor.
The present invention is achieved in that a kind of LED light fixture, and said LED light fixture comprises the LED constant-current driving power supply, and said light fixture also comprises a LED switch controlling device, it is characterized in that, said device comprises a switch, and said switch connects said LED constant-current driving power supply,
Said device also comprises one the 2nd P type metal-oxide-semiconductor; Said the 2nd P type metal-oxide-semiconductor and said switch in parallel; The drain electrode of said the 2nd P type metal-oxide-semiconductor connects the input of said LED constant-current driving power supply, and is provided with the LED lamp of at least one between the input of the drain electrode of said the 2nd P type metal-oxide-semiconductor and said LED constant-current driving power supply;
Said device also comprises the 3rd electric capacity, and said the 3rd electric capacity is connected with said switch, and said the 3rd electric capacity end that connects said switch also connects the grid of said the 2nd P type metal-oxide-semiconductor.
Wherein, be in series with second resistance between the input of said switch and LED constant-current driving power supply.
Wherein, said device also comprises the 3rd resistance, said the 3rd electric capacity of said the 3rd resistance parallel connection, and said the 3rd resistance and the said second resistance said switch both sides of living apart.
Wherein, be in series with the 4th resistance between the grid of said the 3rd electric capacity and said the 2nd P type metal-oxide-semiconductor.
Among the present invention, through the 2nd P type metal-oxide-semiconductor and the 3rd electric capacity are set, the 3rd electric capacity connects switch and Switching Power Supply; The 3rd electric capacity also connects the 2nd P type metal-oxide-semiconductor; Between the 2nd P type metal-oxide-semiconductor and the Switching Power Supply input LED lamp is set, when switch connection or cut-off switch power supply, the 3rd electric capacity may command the 2nd P type metal-oxide-semiconductor voltage increases or reduces the voltage of LED lamp slowly; And then the brightness situation can control the LED lamp switch slowly the time; Sense of discomfort when greatly reducing the subscriber switch lamp has prolonged useful life of LED lamp, is beneficial to the development of lighting technology.
Description of drawings
Fig. 1 is the structure chart of LED switch controlling device provided by the invention;
Fig. 2 is the circuit structure diagram of LED light fixture provided by the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, Fig. 1 shows the structure of LED switch controlling device 10 provided by the invention.
Said LED switch controlling device 10 comprises Switching Power Supply 11, also comprises a switch S 1, and said switch S 1 connects said Switching Power Supply 11.
Said LED switch controlling device 10 comprises that also (Metal Oxid Semiconductor, MOS) pipe Q2, the 2nd P type metal-oxide-semiconductor Q2 comprise grid a, source electrode b and drain electrode c to one second P-type mos field effect transistor.Said the 2nd P type metal-oxide-semiconductor Q2 is parallelly connected with said switch S 1.
The drain electrode c of said the 2nd P type metal-oxide-semiconductor Q2 connects the input Vo of said Switching Power Supply 11, and is provided with the LED lamp of at least one between the input Vo of the drain electrode c of said the 2nd P type metal-oxide-semiconductor and said Switching Power Supply 11;
Said LED switch controlling device 10 also comprises the 3rd capacitor C 3, and said the 3rd capacitor C 3 is connected with said switch S 1, and an end of the said switch S 1 of said the 3rd capacitor C 3 connections also connects the grid a of said the 2nd P type metal-oxide-semiconductor Q2.
Wherein, be in series with second resistance R 2 between the input Vo of said switch S 1 and said Switching Power Supply 11.
Wherein, said LED switch controlling device 10 also comprises the 3rd resistance R 3, said the 3rd capacitor C 3 of said the 3rd resistance R 3 parallel connections, and said the 3rd resistance R 3 and the said switch S of said second resistance R, 2 separations 1 both sides.
Wherein, said the 3rd capacitor C 3 and second state between the grid a of P type metal-oxide-semiconductor Q2 and be in series with the 4th resistance R 4.
The operation principle of LED switch controlling device of the present invention is:
When turning on light, close switch S1, the electric current of Switching Power Supply 11 flow through second resistance R 2 and the 3rd capacitor C 3 are charged; According to the characteristic of electric capacity, the voltage at the 3rd capacitor C 3 two ends increases slowly, and then makes the voltage VGS of grid a of the 2nd P type metal-oxide-semiconductor Q2 slowly increase; As VGS during greater than the cut-in voltage VGS (th) of the 2nd P type metal-oxide-semiconductor Q2; The 2nd P type metal-oxide-semiconductor Q2 begins conducting, makes the electric current of drain electrode c of the 2nd P type metal-oxide-semiconductor Q2 greater than zero, and then the LED lamp begins to brighten.
According to the transfer characteristic curve of P type metal-oxide-semiconductor, along with the increase gradually of the voltage VGS of the grid a of the 2nd P type metal-oxide-semiconductor Q2, the electric current of the drain electrode c of the 2nd P type metal-oxide-semiconductor Q2 also constantly increases, and then makes LED blast gradually.
When the 3rd capacitor C 3 was full of electricity, the voltage VGS of the grid a of the 2nd P type metal-oxide-semiconductor Q2 reached peak, and the electric current of the drain electrode c of the 2nd P type metal-oxide-semiconductor Q2 also reaches maximum, and this moment, the LED lamp was the brightest.
Among the present invention, the LED lamp depends on the capacity of the resistance and the 3rd capacitor C 3 of second resistance R 2 by the length of the complete bright time t that do not work when turning on light, and the capacity of the resistance of second resistance R 2 and the 3rd capacitor C 3 is more little, and time t is short more; Otherwise the capacity of the resistance of second resistance R 2 and the 3rd capacitor C 3 is big more, and time t is long more.
When turning off the light, cut-off switch S1, the 3rd capacitor C 3 is discharged through the 3rd resistance R 3 slowly; The LED lamp is deepening gradually also; When the 3rd capacitor C 3 discharges into to a certain degree, make the voltage VGS of grid a of the 2nd P type metal-oxide-semiconductor Q2 less than the cut-in voltage VGS (th) of the 2nd P type metal-oxide-semiconductor Q2, then the LED lamp extinguishes.
In the LED switch controlling device provided by the invention, the cut-out of electric current or voltage even load and connection are not suddenly to accomplish moment, but process, perhaps little by little descending completion cutting-off process are connected in little by little ascending completion.LED switch controlling device provided by the invention is used for the circuit of LED light fixture, and the LED lamp is little bright bright to entirely again by not working when turning on light, and whole process is accomplished rallentando, and the process of turning off the light is then opposite.Obviously, LED switch controlling device provided by the invention can avoid light to change the stimulation that causes to human eye suddenly.Simultaneously, the peaking voltage and the rush of current at LED two ends when LED switch controlling device provided by the invention can also be eliminated hand switch have prolonged useful life of LED light fixture.
Fig. 2 is the circuit structure of LED light fixture provided by the invention.
Wherein, The circuit structure of LED light fixture shown in Figure 2; Be actually the Switching Power Supply 11 in the LED switch controlling device 10 shown in Figure 1 is replaced with LED constant-current driving power supply 20; Other annexation and LED switch controlling device 10 shown in Figure 1 are similar, and the structure of giving unnecessary details LED switch controlling device 10 is here no longer in detail only described the power supply the principle of LED constant-current driving power supply 20.
See also Fig. 2; Alternating current through obtaining high voltage direct current after rectifier bridge D1 rectification and 1 filtering of first capacitor C, passes through pulse-width modulation (Pulse Width Modulation more then through electromagnetic interface filter 21 filtering high frequency clutter and interference signals; PWM) controller 22 is controlled the conducting of a P type metal-oxide-semiconductor Q1 and is ended; Utilize the coupling of transformer T1, convert high voltage direct current into high-frequency Rectified alternating current, through the rectification processing of diode D2 and the Filtering Processing of second capacitor C 2; Can obtain low-voltage DC, supply the LED lighting loop to use.At last; Detect the electric current in LED loop through first resistance R 1 and constant current/pressure limiting control circuit 23; And feed back to pwm control circuit 22 in real time through optocoupler U1 (comprising optocoupler U1A and optocoupler U1B); By the switch of pwm control circuit 22 controls the one P type metal-oxide-semiconductor Q1, to reach the purpose of regulation and control LED constant current.
Among the present invention, through the 2nd P type metal-oxide-semiconductor and the 3rd electric capacity are set, the 3rd electric capacity connects switch and Switching Power Supply; The 3rd electric capacity also connects the 2nd P type metal-oxide-semiconductor; Between the 2nd P type metal-oxide-semiconductor and the Switching Power Supply input LED lamp is set, when switch connection or cut-off switch power supply, the 3rd electric capacity may command the 2nd P type metal-oxide-semiconductor voltage increases or reduces the voltage of LED lamp slowly; And then the brightness situation can control the LED lamp switch slowly the time; Sense of discomfort when greatly reducing the subscriber switch lamp has prolonged useful life of LED lamp, is beneficial to the development of lighting technology.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. LED switch controlling device; It is characterized in that said device comprises Switching Power Supply, said Switching Power Supply comprises input; Said device also comprises a switch; Said switch connects said Switching Power Supply, and said device also comprises one the 2nd P type metal-oxide-semiconductor, said the 2nd P type metal-oxide-semiconductor and said switch in parallel; The drain electrode of said the 2nd P type metal-oxide-semiconductor connects the input of said Switching Power Supply, and is provided with the LED lamp of at least one between the input of the drain electrode of said the 2nd P type metal-oxide-semiconductor and said Switching Power Supply; Said device also comprises the 3rd electric capacity, and said the 3rd electric capacity is connected with said switch, and said the 3rd electric capacity end that connects said switch also connects the grid of said the 2nd P type metal-oxide-semiconductor.
2. LED switch controlling device as claimed in claim 1 is characterized in that, is in series with second resistance between the input of said switch and said Switching Power Supply.
3. LED switch controlling device as claimed in claim 2 is characterized in that said device also comprises the 3rd resistance, said the 3rd electric capacity of said the 3rd resistance parallel connection, and said the 3rd resistance and the said second resistance said switch both sides of living apart.
4. LED switch controlling device as claimed in claim 1 is characterized in that, is in series with the 4th resistance between the grid of said the 3rd electric capacity and said the 2nd P type metal-oxide-semiconductor.
5. a LED light fixture is characterized in that, said LED light fixture comprises the LED constant-current driving power supply; Said light fixture also comprises a LED switch controlling device; It is characterized in that said device comprises a switch, said switch connects said LED constant-current driving power supply; Said device also comprises one the 2nd P type metal-oxide-semiconductor; Said the 2nd P type metal-oxide-semiconductor and said switch in parallel, the drain electrode of said the 2nd P type metal-oxide-semiconductor connects the input of said LED constant-current driving power supply, and is provided with the LED lamp of at least one between the input of the drain electrode of said the 2nd P type metal-oxide-semiconductor and said LED constant-current driving power supply; Said device also comprises the 3rd electric capacity, and said the 3rd electric capacity is connected with said switch, and said the 3rd electric capacity end that connects said switch also connects the grid of said the 2nd P type metal-oxide-semiconductor.
6. LED light fixture as claimed in claim 5 is characterized in that, is in series with second resistance between the input of said switch and LED constant-current driving power supply.
7. LED light fixture as claimed in claim 6 is characterized in that said device also comprises the 3rd resistance, said the 3rd electric capacity of said the 3rd resistance parallel connection, and said the 3rd resistance and the said second resistance said switch both sides of living apart.
8. LED light fixture as claimed in claim 5 is characterized in that, is in series with the 4th resistance between the grid of said the 3rd electric capacity and said the 2nd P type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110108835 CN102762007A (en) | 2011-04-28 | 2011-04-28 | LED lamp and LED switch control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110108835 CN102762007A (en) | 2011-04-28 | 2011-04-28 | LED lamp and LED switch control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102762007A true CN102762007A (en) | 2012-10-31 |
Family
ID=47056294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110108835 Pending CN102762007A (en) | 2011-04-28 | 2011-04-28 | LED lamp and LED switch control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102762007A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053281A (en) * | 2014-06-16 | 2014-09-17 | 京东方光科技有限公司 | Lighting jig |
| WO2016065744A1 (en) * | 2014-10-29 | 2016-05-06 | 东莞勤上光电股份有限公司 | Led circuit |
| CN109496028A (en) * | 2015-03-30 | 2019-03-19 | 昂宝电子（上海）有限公司 | LED drive circuit and LED lamp |
-
2011
- 2011-04-28 CN CN 201110108835 patent/CN102762007A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053281A (en) * | 2014-06-16 | 2014-09-17 | 京东方光科技有限公司 | Lighting jig |
| CN104053281B (en) * | 2014-06-16 | 2016-12-21 | 京东方光科技有限公司 | Lighting jig |
| US9599678B2 (en) | 2014-06-16 | 2017-03-21 | Boe Technology Group Co., Ltd. | Testing system for backlight source |
| WO2016065744A1 (en) * | 2014-10-29 | 2016-05-06 | 东莞勤上光电股份有限公司 | Led circuit |
| CN109496028A (en) * | 2015-03-30 | 2019-03-19 | 昂宝电子（上海）有限公司 | LED drive circuit and LED lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101657057B (en) | LED power circuit | |
| CN103298221B (en) | Dimming circuit and method of LED (Light Emitting Diode) lighting lamp | |
| CN103269537B (en) | Multi-circuit current-limiting power supplying circuit, controlling method thereof and current-limiting power supplying method thereof | |
| CN201663735U (en) | LED power supply | |
| CN103442501A (en) | Forced constant flow source dimming LED (Light Emitting Diode) lamp | |
| CN201967222U (en) | LED (light-emitting diode) lamp and LED switching control device | |
| CN105657927A (en) | Light source driving circuit and light source electric energy control circuit | |
| CN103546027A (en) | Power supply, solid-state light-emitting element lighting device, and luminaire | |
| CN102404907B (en) | Three-wire dimmer | |
| CN102685989A (en) | PWM (Pulse-Width modulation) dimming method and circuit of LED constant-current source concentratively powered by high-voltage direct current | |
| CN104780694A (en) | LED touch dimming constant current drive power source | |
| CN204518177U (en) | A kind of LED drive power circuit | |
| CN102762007A (en) | LED lamp and LED switch control device | |
| CN201528447U (en) | LED driving power supply circuit | |
| CN205611031U (en) | Illumination lamp driving circuit with function of gradually going out | |
| CN201967220U (en) | LED (Light-emitting diode) constant current driving circuit device | |
| CN201854475U (en) | Light-emitting diode driving device | |
| CN210579355U (en) | Single live wire control circuit of diode | |
| CN204598401U (en) | A kind of LED touch dimmer power supply | |
| CN203340367U (en) | Light modulation circuit for LED illuminating lamp | |
| CN206237643U (en) | A kind of linear constant current controls LED | |
| CN203340368U (en) | LED dimming table lamp | |
| CN203289708U (en) | A multi-loop current-limiting power supply circuit | |
| CN202503745U (en) | LED work-mode controlling means | |
| CN201509348U (en) | LED power circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121031 |