CN2739918Y - Light-operated night lamp - Google Patents
Light-operated night lamp Download PDFInfo
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- CN2739918Y CN2739918Y CN 200420090754 CN200420090754U CN2739918Y CN 2739918 Y CN2739918 Y CN 2739918Y CN 200420090754 CN200420090754 CN 200420090754 CN 200420090754 U CN200420090754 U CN 200420090754U CN 2739918 Y CN2739918 Y CN 2739918Y
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Abstract
The utility model relates to an illuminating apparatus which is widely applied to various public places and families, in particular to a small light-operated night lamp which is electricity-saving, energy-saving and universal. The circuit of the small light-operated night lamp is composed of a bridge type rectified circuit part, a filter circuit part, a voltage stabilizing circuit part and a control circuit part. The control circuit part can control the on/off of a light-emitting diode LED by making use of the photosensitivity of a photoresistor RG and the conducting condition of two triodes. The utility model solves the technical problems existing in the prior art that the control of the circuit is not stable and the circuit consumes large quantity of power. The utility model can automatically control the on/off of a lamp according to the light intensity, and has the advantages of electricity saving, energy saving, and high stability.
Description
Technical field
The utility model relates to a kind of lighting device that is widely used in various public places and family, especially a kind of can power saving, energy-conservation, general Light-operated night lamp.
Background technology
Light fixture is used very wide in modern society, the world that does not have electric light now is inconceivable.The electric light of various functions also has a lot, as electricity-saving lamp, health care lamp or the like.In some public place, need such light fixture, come the light on and off time of automatic control lamp exactly according to the power of extraneous light, as the light-operated electricity-saving lamp of patent (94202049.9), switch in its circuit is to adopt one-way SCR, and anode and negative electrode are exported positive and negative end with the bridge rectifier of diode composition respectively and joined.Light shutter device is photo resistance, joins with the base stage and the negative terminal of triode, and serial connection one resistance connects and the SCR control utmost point on the transistor emitter, forms control section.Illuminating lamp adopts miniature transformer to become low-voltage, for bulb light or with commercially available 220 volts of ballast-frees smaller or equal to 3 watts of lamps, be serially connected in the arbitrary end of input of bridge rectifier.But sort circuit voltage is not very stable, and control is not fine, and relatively power consumption.
Summary of the invention
The utility model mainly is that the control of solution existing in prior technology is not very stable, and relatively power consumption.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of Light-operated night lamp, comprise the bridge rectifier part, the filter circuit part, voltage stabilizing circuit part and control circuit part, control circuit partly is with LED and photo resistance one end, the emitter parallel connection of triode T2, the photo resistance other end links to each other with the base stage of triode T2, the base stage of triode T2 is by resistance R 4 ground connection, LED links to each other with the collector electrode of triode T1, the collector electrode of triode T2 links to each other with the base stage of triode T1 by a resistance R 5, the base stage of triode T1 is by resistance R 6 ground connection, the grounded emitter of triode T1.R4, R6 adjust in low resistance, determine unblocked level.
As preferably, feedback resistance Rf of polyphone between the base stage of described LED and triode T2, the resistance size of feedback resistance Rf is determined with the number of LED.And also influence the number of LED by the voltage of voltage regulation of exporting after the voltage stabilizing; By feedback resistance, can improve stability.
As preferably, described triode T1 is a NPN type triode, and triode T2 is the positive-negative-positive triode.Two triodes are worked simultaneously, simultaneously by.
As preferably, the resistance of described photo resistance is 5K Ω-20M Ω.Guaranteed the reliably working of mini light night.
Therefore, the utlity model has can be according to the strong and weak automatic control switch lamp of light, and power saving, energy-conservation, stability is high.
Description of drawings:
Accompanying drawing 1 is the electrical schematic diagram of Light-operated night lamp.
The concrete example of implementing:
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: as shown in Figure 1, the bridge rectifier part that Light-operated night lamp is made up of four diodes, filter circuit part, voltage stabilizing circuit part and control circuit are partly formed, and control circuit partly is to utilize the turn-on condition of the light sensitive characteristic of photo resistance RG and two triodes to realize the light on and off of control LED.Electric current is after over commutation, filtering, voltage stabilizing, and electric current outputs to the emitter of photo resistance, triode T2 and the parallel connected end of LED, and the other end of photo resistance links to each other with the base stage of triode T2, also connects resistance R 4 ground connection simultaneously; The collector electrode of triode T2 connects the back by resistance R 5 and links to each other with the base stage of triode T1, is connected in series a feedback resistance Rf between another base stage with triode T2 of breaking of LED; Simultaneously the other end of LED also links to each other with the collector electrode of triode T1, the grounded emitter of triode T1, the resistance R 6 of contacting between the base stage of triode T1 and emitter.Its concrete operation principle is: when daytime, light was more intense, characteristic according to photo resistance, the resistance of photo resistance this moment is less, triode is that T2 is a positive-negative-positive, the emitter junction of triode T2 is anti-inclined to one side, triode T2 is in by the district, the collector electrode of triode T2 is connected with triode T1 by resistance R 5, the emitter of triode T1 links to each other with LED, since triode T2 by, make triode T1 also be in by the district, not conducting just, thus LED is in and extinguishes state; Interim when night, according to the characteristic of photo resistance, the resistance of photo resistance this moment is very big, the emitter junction of triode T2 is in positively biased, makes triode T2 conducting, thus also conducting of triode T1, LED and triode T1 form the loop, and LED is lighted, and are used for throwing light on.Between the base stage of LED and triode T2, be connected in series a feedback resistance Rf,, adjust bright, the starting to control a little of going out of LED by the value of the suitable feedback quantity Rf that adjusts.
Claims (4)
1. Light-operated night lamp, comprise the bridge rectifier part, the filter circuit part, voltage stabilizing circuit part and control circuit part, it is characterized in that: control circuit partly is with LED and photo resistance one end, the emitter parallel connection of triode T2, the photo resistance other end links to each other with the base stage of triode T2, the base stage of triode T2 is by resistance R 4 ground connection, LED links to each other with the collector electrode of triode T1, the collector electrode of triode T2 links to each other with the base stage of triode T1 by a resistance R 5, the base stage of triode T1 is by resistance R 6 ground connection, the grounded emitter of triode T1.
2. Light-operated night lamp according to claim 1 is characterized in that: feedback resistance Rf of polyphone between the base stage of described LED and triode T2, the resistance size of feedback resistance Rf is determined with the number of LED.
3. Light-operated night lamp according to claim 1 and 2 is characterized in that: described triode T1 is a NPN type triode, and triode T2 is the positive-negative-positive triode.
4. according to claim 1 or 2 or 5 described Light-operated night lamps, it is characterized in that: the resistance of described photo resistance is 5K Ω-20M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090754 CN2739918Y (en) | 2004-09-28 | 2004-09-28 | Light-operated night lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090754 CN2739918Y (en) | 2004-09-28 | 2004-09-28 | Light-operated night lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2739918Y true CN2739918Y (en) | 2005-11-09 |
Family
ID=35354978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420090754 Expired - Fee Related CN2739918Y (en) | 2004-09-28 | 2004-09-28 | Light-operated night lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2739918Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103200743A (en) * | 2013-04-15 | 2013-07-10 | 苏州经贸职业技术学院 | Intelligent control small lamp with low energy consumption |
| CN104427692A (en) * | 2013-08-26 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Light-controlled automatic switch circuit and lamp |
| CN105007067A (en) * | 2015-07-16 | 2015-10-28 | 六安市同心畅能电子科技有限公司 | Latchkey type zero-power consumption power-saving switch |
-
2004
- 2004-09-28 CN CN 200420090754 patent/CN2739918Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103200743A (en) * | 2013-04-15 | 2013-07-10 | 苏州经贸职业技术学院 | Intelligent control small lamp with low energy consumption |
| CN104427692A (en) * | 2013-08-26 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Light-controlled automatic switch circuit and lamp |
| CN104427692B (en) * | 2013-08-26 | 2019-02-05 | 深圳市海洋王照明工程有限公司 | A kind of photocontrol automatic switching circuit and lamps and lanterns |
| CN105007067A (en) * | 2015-07-16 | 2015-10-28 | 六安市同心畅能电子科技有限公司 | Latchkey type zero-power consumption power-saving switch |
| CN105007067B (en) * | 2015-07-16 | 2018-08-31 | 六安市同心畅能电子科技有限公司 | Hang key type zero-power battery-conserving switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |