CN103974510A - LED light-emitting circuit for night lamp - Google Patents
LED light-emitting circuit for night lamp Download PDFInfo
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- CN103974510A CN103974510A CN201410159611.0A CN201410159611A CN103974510A CN 103974510 A CN103974510 A CN 103974510A CN 201410159611 A CN201410159611 A CN 201410159611A CN 103974510 A CN103974510 A CN 103974510A
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Abstract
The invention discloses an LED light-emitting circuit for a night lamp. The LED light-emitting circuit comprises a light-emitting unit composed of a first resistor and a light emitting diode in series, the light-emitting unit is connected with a current-limiting capacitor in series, and the current-limiting capacitor is connected with a second resistor in parallel; the light-emitting unit is connected with a surge voltage unit in parallel, and the surge voltage unit is composed of a plurality of diodes connected end to end; the light-emitting unit is connected with a discharge voltage protection diode in parallel, and the discharge voltage protection diode is in reverse connection with the surge voltage unit; the light-emitting unit is further connected with a fuse wire in series. The LED light-emitting circuit has the advantages of being safe, reliable, high in current-and-voltage-impact-resistant capacity, long in service life, simple in structure and low in power quality requirement.
Description
Technical field
The present invention relates to night-light, be specifically related to a kind of LED illuminating circuit for night-light.
Background technology
Night-light is a kind of low light level class lighting apparatus of extensive use, due to cheap, energy consumption is lower, has therefore been subject to general welcome.The luminescence unit that the night-light of prior art generally adopts resistance and light-emitting diode to be composed in series is realized illumination, but the luminescence unit that resistance and light-emitting diode are composed in series is poor to the adaptive capacity of electric current, once there is fluctuation in power supply, the electric current that easily causes light-emitting diode is excessive and damage, and has the shortcoming that resistance to current/voltage impact capacity is poor, useful life is short.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of safe and reliable, resistance to current/voltage impact capacity is strong, long service life, the LED illuminating circuit for night-light that simple in structure, power quality requirement is low.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
For a LED illuminating circuit for night-light, comprise the luminescence unit being composed in series by the first resistance and light-emitting diode, described luminescence unit and a current limiting capacitance are connected in series, and described current limiting capacitance and second resistance are connected in parallel.
Further, described luminescence unit is connected in parallel to surge voltage unit, and described surge voltage unit is joined end to end and forms successively by multiple diodes.
Further, described luminescence unit is connected in parallel to discharge voltage protection diode, described discharge voltage protection diode and surge voltage unit Opposite direction connection.
Further, described luminescence unit is also connected in series with a fuse.
The present invention has following advantage: the present invention is connected in series by luminescence unit and a current limiting capacitance, thereby can play to the electric current of the luminescence unit of flowing through the effect of current limliting, prevent from burning out because the fluctuation of 220V power supply causes illuminating circuit, be particularly useful for the regions such as the unsettled rural area of power supply quality, and because current limiting capacitance and second resistance are connected in parallel, can play protection effect to current limiting capacitance, can prevent the overtension at current limiting capacitance two ends and damage, have safe and reliable, resistance to current/voltage impact capacity is strong, long service life, simple in structure, power quality requires low advantage.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit theory schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made to more explicit defining.
As shown in Figure 1, the present embodiment comprises for the LED illuminating circuit of night-light the luminescence unit being composed in series by the first resistance R 1 and LED, and luminescence unit and a current limiting capacitance C1 are connected in series, and current limiting capacitance C1 and second resistance R 2 are connected in parallel.The present embodiment is connected in series by luminescence unit and a current limiting capacitance C1, thereby can play to the electric current of the luminescence unit of flowing through the effect of current limliting, prevent from burning out because the fluctuation of 220V power supply causes LED illuminating circuit, be particularly useful for the regions such as the unsettled rural area of power supply quality, and because current limiting capacitance C1 and second resistance R 2 are connected in parallel, can play protection effect to current limiting capacitance C1, can prevent the overtension at current limiting capacitance C1 two ends and damage, have safe and reliable, resistance to current/voltage impact capacity is strong, long service life, simple in structure, power quality requires low advantage.
In the present embodiment, luminescence unit is connected in parallel to surge voltage unit, and surge voltage unit is joined end to end and forms successively by multiple diodes (VD1～VD4).Multiple diodes (VD1～VD4) of surge voltage unit can suppress to produce surge voltage during the power supply open and close of luminescence unit, prevent that surge voltage from causing LED to puncture.
In the present embodiment, luminescence unit is connected in parallel to discharge voltage protection diode VD5, discharge voltage protection diode VD5 and surge voltage unit Opposite direction connection.The reverse voltage that discharge voltage protection diode VD5 produces can stop current limiting capacitance C1 electric discharge time, prevents that reverse voltage from causing LED to puncture.
In the present embodiment, luminescence unit is also connected in series with a fuse F1, and in the time that luminescence unit circuit is excessive, fuse F1 is fusing automatically, thereby disconnects luminescence unit with protection luminescence unit.
The foregoing is only the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned execution mode, and every technical scheme that belongs to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, some improvements and modifications of carrying out under the prerequisite that does not depart from principle of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. for a LED illuminating circuit for night-light, comprise the luminescence unit being composed in series by the first resistance and light-emitting diode, it is characterized in that: described luminescence unit and a current limiting capacitance are connected in series, described current limiting capacitance and second resistance are connected in parallel.
2. the LED illuminating circuit for night-light according to claim 1, is characterized in that: described luminescence unit is connected in parallel to surge voltage unit, and described surge voltage unit is joined end to end and forms successively by multiple diodes.
3. the LED illuminating circuit for night-light according to claim 2, is characterized in that: described luminescence unit is connected in parallel to discharge voltage protection diode, described discharge voltage protection diode and surge voltage unit Opposite direction connection.
4. the LED illuminating circuit for night-light according to claim 3, is characterized in that: described luminescence unit is also connected in series with a fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410159611.0A CN103974510A (en) | 2014-04-21 | 2014-04-21 | LED light-emitting circuit for night lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410159611.0A CN103974510A (en) | 2014-04-21 | 2014-04-21 | LED light-emitting circuit for night lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103974510A true CN103974510A (en) | 2014-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410159611.0A Pending CN103974510A (en) | 2014-04-21 | 2014-04-21 | LED light-emitting circuit for night lamp |
Country Status (1)
| Country | Link |
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| CN (1) | CN103974510A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915086A (en) * | 2016-04-15 | 2016-08-31 | 芜湖锐芯电子科技有限公司 | High-efficiency AC/DC power supply circuit, and control method and power supply method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831543Y (en) * | 2005-09-08 | 2006-10-25 | 梅庆周 | Small night lamp-type switching panel |
| CN201127133Y (en) * | 2007-12-12 | 2008-10-01 | 海信（北京）电器有限公司 | Commercial power LED lighting lamp |
| CN102202436A (en) * | 2010-03-23 | 2011-09-28 | 张志军 | Light-emitting diode (LED) unit and constant-current unit voltage-stabilizing light-emitting diode (LED) traffic signal lamp |
| CN202121827U (en) * | 2011-05-30 | 2012-01-18 | 王中慧 | Energy saving lamp circuit |
| CN202857046U (en) * | 2012-08-16 | 2013-04-03 | 广东德豪润达电气股份有限公司 | Led drive circuit |
| CN203387719U (en) * | 2013-05-31 | 2014-01-08 | 江门市鸿海电子有限公司 | LED driver used for illumination |
-
2014
- 2014-04-21 CN CN201410159611.0A patent/CN103974510A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831543Y (en) * | 2005-09-08 | 2006-10-25 | 梅庆周 | Small night lamp-type switching panel |
| CN201127133Y (en) * | 2007-12-12 | 2008-10-01 | 海信（北京）电器有限公司 | Commercial power LED lighting lamp |
| CN102202436A (en) * | 2010-03-23 | 2011-09-28 | 张志军 | Light-emitting diode (LED) unit and constant-current unit voltage-stabilizing light-emitting diode (LED) traffic signal lamp |
| CN202121827U (en) * | 2011-05-30 | 2012-01-18 | 王中慧 | Energy saving lamp circuit |
| CN202857046U (en) * | 2012-08-16 | 2013-04-03 | 广东德豪润达电气股份有限公司 | Led drive circuit |
| CN203387719U (en) * | 2013-05-31 | 2014-01-08 | 江门市鸿海电子有限公司 | LED driver used for illumination |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915086A (en) * | 2016-04-15 | 2016-08-31 | 芜湖锐芯电子科技有限公司 | High-efficiency AC/DC power supply circuit, and control method and power supply method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |