CN201199740Y - Lamp string control circuit - Google Patents
Lamp string control circuit Download PDFInfo
- Publication number
- CN201199740Y CN201199740Y CNU2008201143445U CN200820114344U CN201199740Y CN 201199740 Y CN201199740 Y CN 201199740Y CN U2008201143445 U CNU2008201143445 U CN U2008201143445U CN 200820114344 U CN200820114344 U CN 200820114344U CN 201199740 Y CN201199740 Y CN 201199740Y
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- circuit
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- lamp
- input
- lamp string
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a lamp string controlling circuit, which belongs to the technical field of the controlling circuit. The lamp string controlling circuit comprises a driving circuit, an oscillating circuit, a voltage reducing circuit, an AC/DC circuit and an indicating lamp circuit, wherein, the output terminal of the driving circuit is connected with an over-current protection circuit which consists of a detecting circuit used for detecting the output current of the driving circuit and a protection circuit used for protecting the driving circuit, and the output terminal of the detecting circuit is connected with the input terminal of the protection circuit; the input terminal of the detecting circuit is connected with the output terminal of the driving circuit, and the output terminal of the protection circuit is connected with the input terminal of the driving circuit; compared with the prior lamp string controlling circuit, the lamp string controlling circuit can directly carry out maintenance to the circuit, and can automatically restore to the normal work after the fault is eliminated, the maintenance is convenient, the operation is simple, and the maintenance efficiency is improved, therefore, the production cost can be reduced.
Description
Technical field:
The utility model relates to the control circuit technical field, relates in particular to a kind of lamp cascade control circuit.
Background technology:
General lamp string is in use, production process; produce the situation of short circuit through regular meeting; electric current in the control circuit is increased; promptly produce over-current phenomenon avoidance; this phenomenon is easy to burn out triode or the metal-oxide-semiconductor field effect transistor (MOSFET, Metal-Oxide-Semiconductor Field-Effect-Transistor) that is used to drive the lamp string in the control circuit.Existing lamp cascade control circuit; in order to prevent that circuit from burning out because of overcurrent, the fuse of the rated current of normally connecting in circuit is when the electric current in the circuit is excessive; automatically blowout is not burnt out thereby protection is used to drive the triode or the metal-oxide-semiconductor field effect transistor of lamp string.The shortcoming of this lamp cascade control circuit is, when over-current phenomenon avoidance appears in each circuit, all need to change fuse, troublesome poeration especially in the production process of lamp string, is easy to generation and flies phenomenons such as a short circuit, scruff short circuit, need often to change fuse, not only waste a large amount of fuses, and expend more manually, the production cost of lamp string is increased.
The utility model content:
The purpose of this utility model is exactly to provide a kind of lamp cascade control circuit that is provided with current foldback circuit at the deficiency of prior art existence.
For achieving the above object, the utility model adopts following technical scheme:
It comprises drive circuit, oscillating circuit, reduction voltage circuit, AC/DC (exchanging changes direct current) circuit, indicator light circuit; The output of described drive circuit is connected with the lamp string, is used to drive the work of lamp string; Described oscillating circuit is used to produce frequency of oscillation, and this frequency of oscillation is input to the input of drive circuit; Described reduction voltage circuit is used to each circuit that stable operating voltage is provided; Described AC/DC circuit is connected with the input of reduction voltage circuit; The output of described drive circuit is connected with current foldback circuit, and current foldback circuit is made up of testing circuit and protective circuit, and the output of testing circuit is connected with the input of protective circuit; The input of testing circuit is connected with the output of drive circuit, and the output of protective circuit is connected with the input of drive circuit; Be provided with indicator light circuit between described drive circuit and the reduction voltage circuit, be used to indicate the operating state of The whole control circuit.
Described drive circuit is made up of control unit and driver element, the output of control unit is connected with the input of driver element, the input of control unit is connected with the output of oscillating circuit and the output of reduction voltage circuit respectively, and the output of driver element and lamp polyphone connect.
Described control unit is provided with photosensitive components and parts, is used to respond to extraneous intensity of illumination, and described photosensitive components and parts are photo resistance or photistor.
Described control unit adopts has the integrated circuit (IC) chip of timing function.
Described control unit is provided with memory chip U2, is used to remember the operating state of control circuit.
Described driver element adopts metal-oxide-semiconductor field effect transistor Q1, Q2, Q3, Q4 to drive the lamp string.
Described oscillating circuit is a quartz crystal oscillator circuit.
Described lamp string is a LED lamp string.
The beneficial effects of the utility model are:
A kind of lamp cascade control circuit that the utility model provides, it comprises drive circuit, oscillating circuit, reduction voltage circuit, AC/DC circuit, indicator light circuit, it is that output at drive circuit is connected with current foldback circuit, current foldback circuit is made up of testing circuit and protective circuit, and the output of testing circuit is connected with the input of protective circuit; The input of testing circuit is connected with the output of drive circuit, and the output of protective circuit is connected with the input of drive circuit; When testing circuit detects the electric current of drive circuit output when excessive; can send a signal enabling protective circuit; protective circuit will drag down the operating voltage of drive circuit; drive circuit is quit work; thereby triode or metal-oxide-semiconductor field effect transistor in the protection drive circuit are not damaged; after over current fault in circuit was eliminated, protective circuit was just recovered the operating voltage of drive circuit automatically, made drive circuit recover operate as normal.Therefore, compare with existing lamp cascade control circuit, the utility model can directly overhaul circuit, and pending fault can recover operate as normal after eliminating automatically, and is easy to maintenance, simple to operate, can improve overhaul efficiency, thereby reduce production costs.
Further, be provided with indicator light circuit between described drive circuit and the reduction voltage circuit, be used to indicate the operating state of The whole control circuit, make people can see the working condition of control circuit intuitively, damage lamp string or circuit to avoid the human operational error.
Description of drawings:
Fig. 1 is the circuit theory diagrams of driver element, current foldback circuit and the lamp string of the utility model AC/DC circuit, reduction voltage circuit, drive circuit;
Fig. 2 is the circuit theory diagrams of control unit, oscillating circuit and the indicator light circuit of the utility model drive circuit.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described, sees shown in Fig. 1,2, a kind of lamp cascade control circuit that the utility model provides comprises drive circuit, oscillating circuit 6, reduction voltage circuit 2, AC/DC circuit 1, indicator light circuit 7; The output of described drive circuit is connected with lamp string 5, is used to drive 5 work of lamp string, and described lamp string 5 is a LED lamp string; Described oscillating circuit 6 is used to produce frequency of oscillation, and this frequency of oscillation is input to the input of drive circuit, and more particularly, described oscillating circuit 6 is a quartz crystal oscillator circuit; Described reduction voltage circuit 2 is used to each circuit that stable operating voltage is provided; Described AC/DC circuit 1 is connected with the input of reduction voltage circuit 2; The output of described drive circuit is connected with current foldback circuit 4, and current foldback circuit 4 is made up of testing circuit 41 and protective circuit 42, and the output of testing circuit 41 is connected with the input of protective circuit 42; The input of testing circuit 41 is connected with the output of drive circuit, and the output of protective circuit 42 is connected with the input of drive circuit; Be provided with indicator light circuit 7 between described drive circuit and the reduction voltage circuit 2, be used to indicate the operating state of The whole control circuit.
Described drive circuit is made up of control unit 31 and driver element 32, the output of control unit 31 is connected with the input of driver element 32, the input of control unit 31 is connected with the output of oscillating circuit 6 and the output of reduction voltage circuit 2 respectively, and the output of driver element 32 is connected with lamp string 5.
Described control unit 31 is provided with photosensitive components and parts, is used to respond to extraneous intensity of illumination, and described photosensitive components and parts are photo resistance or photistor; In the present embodiment, select for use photo resistance CDS to respond to extraneous intensity of illumination, when intensity of illumination is lower than set point, drive 5 work of lamp string, promptly realize light-operated function; Described control unit 31 adopts the integrated circuit (IC) chip U1 with timing function, and the lamp string length of 5 operating times can be set in its inside, promptly realizes the function of time control.In conjunction with above-mentioned light-operated and time control function, make that the utility model can automatic control lamp string 5 not be worked by day, light evening automatically, thereby reduce unnecessary energy loss, reach the purpose of energy-conserving and environment-protective.
Described control unit 31 is provided with memory chip U2, be used to remember the operating state of control circuit, when stopping to import power supply, the operating state that circuit set before the automatic memory storage of memory chip U2 meeting had a power failure, when treating that power supply re-enters, can automatically restore to the operating state that circuit sets before having a power failure.
Described driver element 32 adopts metal-oxide-semiconductor field effect transistor Q1, Q2, Q3, Q4 to drive lamp string 5, because that metal-oxide-semiconductor field effect transistor has is stable, response is fast, therefore, makes the The whole control circuit have stability and response preferably.
Operation principle of the present utility model:
When the testing circuit in the overcurrent protective circuit 4 41 detects the electric current of drive circuit output when excessive, can send a signal enabling protective circuit 42, protective circuit 42 will be pulled low to the input voltage of drive circuit control unit 31 below the operating voltage, drive circuit is quit work, thereby the metal-oxide-semiconductor field effect transistor Q1～Q4 of protection in the drive circuit do not damage because of instantaneous large-current or overcurrent; Because the protective circuit 42 in the current foldback circuit 4 is an automatic restoring circuit, after the over current fault in the circuit was eliminated, protective circuit 42 can be recovered the operating voltage of drive circuit automatically, makes drive circuit recover operate as normal.Therefore, the utility model can directly overhaul circuit when over current fault takes place, and need not deenergization, and after pending fault was eliminated, circuit can recover operate as normal automatically, and was easy to maintenance, improved overhaul efficiency.
Certainly, the example of the above, it is preferred embodiments of the present utility model, be not to be used for limiting practical range of the present utility model, so all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.
Claims (9)
1. lamp cascade control circuit, it comprises drive circuit, oscillating circuit (6), reduction voltage circuit (2), AC/DC circuit (1), indicator light circuit (7);
The output of described drive circuit is connected with lamp string (5), is used to drive lamp string (5) work;
Described oscillating circuit (6) is used to produce frequency of oscillation, and this frequency of oscillation is input to the input of drive circuit;
Described reduction voltage circuit (2) is used to each circuit that stable operating voltage is provided;
Described AC/DC circuit (1) is connected with the input of reduction voltage circuit (2);
It is characterized in that: the output of described drive circuit is connected with current foldback circuit (4), and current foldback circuit (4) is made up of testing circuit (41) and protective circuit (42), and the output of testing circuit (41) is connected with the input of protective circuit (42); The input of testing circuit (41) is connected with the output of drive circuit, and the output of protective circuit (42) is connected with the input of drive circuit;
Be provided with indicator light circuit (7) between described drive circuit and the reduction voltage circuit (2), be used to indicate the operating state of The whole control circuit.
2. lamp cascade control circuit according to claim 1, it is characterized in that: described drive circuit is made up of control unit (31) and driver element (32), the output of control unit (31) is connected with the input of driver element (32), the input of control unit (31) is connected with the output of oscillating circuit (6) and the output of reduction voltage circuit (2) respectively, and the output of driver element (32) is connected with lamp string (5).
3. lamp cascade control circuit according to claim 2 is characterized in that: described control unit (31) is provided with photosensitive components and parts, is used to respond to extraneous intensity of illumination.
4. lamp cascade control circuit according to claim 3 is characterized in that: described photosensitive components and parts are photo resistance or photistor.
5. lamp cascade control circuit according to claim 2 is characterized in that: described control unit (31) adopts has the integrated circuit (IC) chip of timing function.
6. lamp cascade control circuit according to claim 2 is characterized in that: described control unit (31) is provided with memory chip U2, is used to remember the operating state of control circuit.
7. lamp cascade control circuit according to claim 2 is characterized in that: described driver element (32) adopts metal-oxide-semiconductor field effect transistor Q1, Q2, Q3, Q4 to drive lamp string (5).
8. lamp cascade control circuit according to claim 1 is characterized in that: described oscillating circuit (6) is a quartz crystal oscillator circuit.
9. according to any described lamp cascade control circuit of claim 1 to 8, it is characterized in that: described lamp string (5) is a LED lamp string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201143445U CN201199740Y (en) | 2008-05-09 | 2008-05-09 | Lamp string control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201143445U CN201199740Y (en) | 2008-05-09 | 2008-05-09 | Lamp string control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201199740Y true CN201199740Y (en) | 2009-02-25 |
Family
ID=40450890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201143445U Expired - Lifetime CN201199740Y (en) | 2008-05-09 | 2008-05-09 | Lamp string control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201199740Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150998A (en) * | 2013-03-19 | 2013-06-12 | 深圳市华星光电技术有限公司 | LED (Light-Emitting Diode) backlight driving circuit, backlight module and liquid crystal display device |
| CN103917013A (en) * | 2014-03-03 | 2014-07-09 | 湖南瑞航光电科技有限公司 | Programmable colored lamp controller |
-
2008
- 2008-05-09 CN CNU2008201143445U patent/CN201199740Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150998A (en) * | 2013-03-19 | 2013-06-12 | 深圳市华星光电技术有限公司 | LED (Light-Emitting Diode) backlight driving circuit, backlight module and liquid crystal display device |
| CN103150998B (en) * | 2013-03-19 | 2015-11-25 | 深圳市华星光电技术有限公司 | LED backlight drive circuit, backlight module, liquid crystal indicator |
| CN103917013A (en) * | 2014-03-03 | 2014-07-09 | 湖南瑞航光电科技有限公司 | Programmable colored lamp controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGGUAN DAYAN ELECTRONICS CO. LTD. Free format text: FORMER OWNER: DAYAN MOTOR CO., LTD. Effective date: 20101029 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: ROOM C13, 5/F, NO.210, SECTION 3 OF DA-TUNG ROAD, HSI-CHIH, TAIPEI COUNTY, TAIWAN PROVINCE, CHINA TO: 523457 INDUSTRY ZONE 3, DONGKENG VILLAGE, DONGKENG TOWN, DONGGUAN CITY, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101029 Address after: 523457 Guangdong province Dongguan Dongkeng village Dongkeng Town Industrial Zone Third Patentee after: Dongwan Dayan Electrical Appliances Co.,Ltd. Address before: Taiwan Taipei County Chinese Sijhih three Datong Road No. 210 Building 5 room C13 Patentee before: Dayan Motor Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090225 |