CN201967222U - LED (light-emitting diode) lamp and LED switching control device - Google Patents
LED (light-emitting diode) lamp and LED switching control device Download PDFInfo
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- CN201967222U CN201967222U CN201120130996XU CN201120130996U CN201967222U CN 201967222 U CN201967222 U CN 201967222U CN 201120130996X U CN201120130996X U CN 201120130996XU CN 201120130996 U CN201120130996 U CN 201120130996U CN 201967222 U CN201967222 U CN 201967222U
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- 239000004065 semiconductor Substances 0.000 claims abstract description 53
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- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
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Abstract
The utility model discloses an LED (light-emitting diode) lamp and an LED switching control device. The LED switching control device comprises a switching power supply, a switch, a second P-type MOS (Metal Oxide Semiconductor) tube and a third capacitor, wherein the switch is connected with the switching power supply; the second P-type MOS tube is connected in parallel with the switch; a drain electrode of the second P-type MOS tube is connected with an input end of the switching power supply; at least one LED lamp is arranged between the drain electrode of the second P-type MOS tube and the input end of the switching power supply; the third capacitor is connected in series with the switch; and the end of the third capacitor, which is connected with the switch, is also connected with a grid electrode of the second P-type MOS tube. By the LED switching control device provided by the utility model, the brightness state of the LED lamp in the turning on and turning off process can be slowly controlled, discomfort feeling of a user when the user turns on and turns off the lamp is greatly reduced, and the service life of the LED lamp is prolonged.
Description
Technical field
The utility model belongs to lighting technical field, relates 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 user is also more and more higher to the requirement of lighting apparatus function.
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 turning on light and turning off the light under the situation of dark 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.
The utility model content
The purpose of the utility model embodiment 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 utility model is to realize like this, a kind of LED switch controlling device, described device comprises Switching Power Supply, described Switching Power Supply comprises input, described device also comprises a switch, described switch connects described Switching Power Supply, described device also comprises one the 2nd P type metal-oxide-semiconductor, described the 2nd P type metal-oxide-semiconductor and described switch in parallel, the drain electrode of described the 2nd P type metal-oxide-semiconductor connects the input of described Switching Power Supply, and is provided with the LED lamp of at least one between the input of the drain electrode of described the 2nd P type metal-oxide-semiconductor and described Switching Power Supply; Described device also comprises the 3rd electric capacity, and described the 3rd electric capacity is connected with described switch, and described the 3rd electric capacity end that connects described switch also connects the grid of described the 2nd P type metal-oxide-semiconductor.
Wherein, be in series with second resistance between the input of described switch and described Switching Power Supply.
Wherein, described device also comprises the 3rd resistance, described the 3rd resistance described the 3rd electric capacity in parallel, and described the 3rd resistance and the described second resistance described switch both sides of living apart.
Wherein, be in series with the 4th resistance between the grid of described the 3rd electric capacity and described the 2nd P type metal-oxide-semiconductor.
The utility model is to realize like this, a kind of LED light fixture, described LED light fixture comprises the LED constant-current driving power supply, described light fixture also comprises a LED switch controlling device, it is characterized in that, described device comprises a switch, described switch connects described LED constant-current driving power supply, described device also comprises one the 2nd P type metal-oxide-semiconductor, described the 2nd P type metal-oxide-semiconductor and described switch in parallel, the drain electrode of described the 2nd P type metal-oxide-semiconductor connects the input of described 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 described the 2nd P type metal-oxide-semiconductor and described LED constant-current driving power supply; Described device also comprises the 3rd electric capacity, and described the 3rd electric capacity is connected with described switch, and described the 3rd electric capacity end that connects described switch also connects the grid of described the 2nd P type metal-oxide-semiconductor.
Wherein, be in series with second resistance between the input of described switch and LED constant-current driving power supply.
Wherein, described device also comprises the 3rd resistance, described the 3rd resistance described the 3rd electric capacity in parallel, and described the 3rd resistance and the described second resistance described switch both sides of living apart.
Wherein, be in series with the 4th resistance between the grid of described the 3rd electric capacity and described the 2nd P type metal-oxide-semiconductor.
In the utility model, by 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 both end 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, prolong the useful life of LED lamp, be beneficial to the development of lighting technology.
Description of drawings
Fig. 1 is the structure chart of the LED switch controlling device that provides of the utility model;
Fig. 2 is the circuit structure diagram of the LED light fixture that provides of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also Fig. 1, Fig. 1 shows the structure of the LED switch controlling device 10 that the utility model provides.
Described LED switch controlling device 10 comprises Switching Power Supply 11, also comprises a switch S 1, and described switch S 1 connects described Switching Power Supply 11.
Described 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.Described the 2nd P type metal-oxide-semiconductor Q2 is in parallel with described switch S 1.
The drain electrode c of described the 2nd P type metal-oxide-semiconductor Q2 connects the input Vo of described 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 described the 2nd P type metal-oxide-semiconductor and described Switching Power Supply 11;
Described LED switch controlling device 10 also comprises the 3rd capacitor C 3, and described the 3rd capacitor C 3 is connected with described switch S 1, and an end of the described switch S 1 of described the 3rd capacitor C 3 connections also connects the grid a of described the 2nd P type metal-oxide-semiconductor Q2.
Wherein, be in series with second resistance R 2 between the input Vo of described switch S 1 and described Switching Power Supply 11.
Wherein, described LED switch controlling device 10 also comprises the 3rd resistance R 3, described the 3rd resistance R 3 described the 3rd capacitor C 3 in parallel, and described the 3rd resistance R 3 and the described switch S of described second resistance R, 2 separations 1 both sides.
Wherein, described 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 utility model is:
When turning on light, Closing Switch S1, the electric current of Switching Power Supply 11 flows through second resistance R 2 and the 3rd capacitor C 3 is 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.
In the utility model, 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 slowly by the 3rd resistance R 3, 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 that the utility model provides, the cut-out of electric current or voltage even load and connection are not suddenly to finish moment, but the little by little ascending connection process of finishing, the perhaps little by little descending cutting-off process of finishing.The LED switch controlling device that the utility model is provided is used for the circuit of LED light fixture, and little bright do not finish rallentando again to bright entirely by whole process by working for the LED lamp when turning on light, and the process of turning off the light is then opposite.Obviously, the LED switch controlling device that provides of the utility model 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 the LED switch controlling device that the utility model provides can also be eliminated hand switch have prolonged useful life of LED light fixture.
The circuit structure of the LED light fixture that Fig. 2 provides for the utility model.
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, give unnecessary details the structure of LED switch controlling device 10 herein no longer in detail, only describe the power supply the principle of LED constant-current driving power supply 20.
See also Fig. 2, alternating current is through electromagnetic interface filter 21 filtering high frequency clutter and interference signals, again through obtaining high voltage direct current after rectifier bridge D1 rectification and 1 filtering of first capacitor C, pass through pulse-width modulation (Pulse Width Modulation then, PWM) controller 22 is controlled the conducting of a P type metal-oxide-semiconductor Q1 and is ended, utilize the coupling of transformer T1, high voltage direct current is converted to high-frequency Rectified alternating current, by the rectification processing of diode D2 and the Filtering Processing of second capacitor C 2, can obtain low-voltage DC, use for the LED lighting loop.At last, detect the electric current in LED loop by first resistance R 1 and constant current/pressure limiting control circuit 23, and comprise optocoupler U1A and optocoupler U1B by optocoupler U1() feed back to pwm control circuit 22 in real time, 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.
In the utility model, by 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 both end 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, prolong the useful life of LED lamp, be beneficial to the development of lighting technology.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. LED switch controlling device, it is characterized in that, described device comprises Switching Power Supply, described Switching Power Supply comprises input, described device also comprises a switch, described switch connects described Switching Power Supply, described device also comprises one the 2nd P type metal-oxide-semiconductor, described the 2nd P type metal-oxide-semiconductor and described switch in parallel, the drain electrode of described the 2nd P type metal-oxide-semiconductor connects the input of described Switching Power Supply, and is provided with the LED lamp of at least one between the input of the drain electrode of described the 2nd P type metal-oxide-semiconductor and described Switching Power Supply; Described device also comprises the 3rd electric capacity, and described the 3rd electric capacity is connected with described switch, and described the 3rd electric capacity end that connects described switch also connects the grid of described 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 described switch and described Switching Power Supply.
3. LED switch controlling device as claimed in claim 2 is characterized in that described device also comprises the 3rd resistance, described the 3rd resistance described the 3rd electric capacity in parallel, and described the 3rd resistance and the described second resistance described 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 described the 3rd electric capacity and described the 2nd P type metal-oxide-semiconductor.
5. LED light fixture, it is characterized in that, described LED light fixture comprises the LED constant-current driving power supply, described light fixture also comprises a LED switch controlling device, it is characterized in that, described device comprises a switch, described switch connects described LED constant-current driving power supply, described device also comprises one the 2nd P type metal-oxide-semiconductor, described the 2nd P type metal-oxide-semiconductor and described switch in parallel, the drain electrode of described the 2nd P type metal-oxide-semiconductor connects the input of described 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 described the 2nd P type metal-oxide-semiconductor and described LED constant-current driving power supply; Described device also comprises the 3rd electric capacity, and described the 3rd electric capacity is connected with described switch, and described the 3rd electric capacity end that connects described switch also connects the grid of described 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 described switch and LED constant-current driving power supply.
7. LED light fixture as claimed in claim 6 is characterized in that described device also comprises the 3rd resistance, described the 3rd resistance described the 3rd electric capacity in parallel, and described the 3rd resistance and the described second resistance described 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 described the 3rd electric capacity and described the 2nd P type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120130996XU CN201967222U (en) | 2011-04-28 | 2011-04-28 | LED (light-emitting diode) lamp and LED switching control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120130996XU CN201967222U (en) | 2011-04-28 | 2011-04-28 | LED (light-emitting diode) lamp and LED switching control device |
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| Publication Number | Publication Date |
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| CN201967222U true CN201967222U (en) | 2011-09-07 |
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| CN201120130996XU Expired - Fee Related CN201967222U (en) | 2011-04-28 | 2011-04-28 | LED (light-emitting diode) lamp and LED switching control device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366687A (en) * | 2012-03-29 | 2013-10-23 | 日本电气株式会社 | LED driving device and LED driving method |
| CN103533721A (en) * | 2013-10-31 | 2014-01-22 | 矽力杰半导体技术(杭州)有限公司 | Pulse type current LED drive circuit |
| CN103891414A (en) * | 2011-10-28 | 2014-06-25 | 太阳诱电株式会社 | Led lamp device |
| WO2016065744A1 (en) * | 2014-10-29 | 2016-05-06 | 东莞勤上光电股份有限公司 | Led circuit |
| US9788369B2 (en) | 2014-07-28 | 2017-10-10 | Silergy Semiconductor Technology (Hangzhou) Ltd | LED driver and LED driving method |
-
2011
- 2011-04-28 CN CN201120130996XU patent/CN201967222U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103891414A (en) * | 2011-10-28 | 2014-06-25 | 太阳诱电株式会社 | Led lamp device |
| CN103366687A (en) * | 2012-03-29 | 2013-10-23 | 日本电气株式会社 | LED driving device and LED driving method |
| CN103533721A (en) * | 2013-10-31 | 2014-01-22 | 矽力杰半导体技术(杭州)有限公司 | Pulse type current LED drive circuit |
| US9215763B2 (en) | 2013-10-31 | 2015-12-15 | Silergy Semiconductor Technology (Hangzhou) Ltd | Pulse current LED driving circuit |
| US9788369B2 (en) | 2014-07-28 | 2017-10-10 | Silergy Semiconductor Technology (Hangzhou) Ltd | LED driver and LED driving method |
| US10542592B2 (en) | 2014-07-28 | 2020-01-21 | Silergy Semiconductor Technology (Hangzhou) Ltd | LED driver and LED driving method |
| WO2016065744A1 (en) * | 2014-10-29 | 2016-05-06 | 东莞勤上光电股份有限公司 | Led circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171103 Address after: 523565 Guangdong city of Dongguan province Changping Zhen Heng Jiang Jiang Xia Heng Industrial Road, set up a file Patentee after: KINGSUN OPTOELECTRONIC CO., LTD. Address before: 523000 Guangdong city of Dongguan province Changping Zhen Heng Jiang set up a file Patentee before: Dongguan Qinshang Photoelectric Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20180428 |
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| CF01 | Termination of patent right due to non-payment of annual fee |