CN201789655U - Illuminating circuit for electric appliance - Google Patents
Illuminating circuit for electric appliance Download PDFInfo
- Publication number
- CN201789655U CN201789655U CN 201020297936 CN201020297936U CN201789655U CN 201789655 U CN201789655 U CN 201789655U CN 201020297936 CN201020297936 CN 201020297936 CN 201020297936 U CN201020297936 U CN 201020297936U CN 201789655 U CN201789655 U CN 201789655U
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- CN
- China
- Prior art keywords
- circuit
- lighting
- alternating
- fixed capacity
- emitting diode
- 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.)
- Expired - Fee Related
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- Y02B20/42—
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to an illuminating circuit for an electric appliance, which is characterized in that the illuminating circuit comprises an alternating-current fixed capacitor, a power supply is connected to one end of the alternating-current fixed capacitor, a rectifying circuit is connected to the other end of the alternating-current fixed capacitor, and two discharging resistors are parallelly connected to two ends of the alternating-current fixed capacitor. By the aid of the alternating-current fixed capacitor, the illuminating circuit protects a light-emitting diode (LED) in an illuminating load circuit from breakdown and burnout, and greatly prolongs the service life of the light-emitting diode (LED) to reach more than 1000 hours.
Description
Technical field:
The utility model relates to the technical field of lighting circuit, specifically a kind of LED lighting circuit that is used for electrical equipment.
Background technology:
At present, all adopt the lighting source of LED Light-Emitting Diode in the household electrical appliances such as refrigerator and microwave oven as lighting circuit, but owing to defectives such as employing direct current fixed capacitors on the design circuit, make the LED Light-Emitting Diode not long useful life, when work, burnt easily and smash.
Summary of the invention:
The purpose of this utility model is to provide a kind of improved lighting circuit that is used for electrical equipment, and the LED light-emitting diode that it can overcome lighting circuit in the prior art is burnt the some shortcomings of smashing easily.
To achieve these goals, the technical solution of the utility model is: a kind of lighting circuit that is used for electrical equipment, it mainly comprises the rectification circuit and the lighting load circuit of serial connection successively, it is characterized in that: also comprise the interchange fixed capacity, one end of described interchange fixed capacity connects power supply, the other end connects rectification circuit, and the two ends that exchange fixed capacity are parallel with first current-limiting resistance.
Adopt in the lighting circuit of the present utility model during use and exchange fixed capacity, thereby not breakdown the burning of LED light-emitting diode in the protection lighting load circuit makes increase greatly the useful life of LED light-emitting diode, can reach more than 1000 hours.
Description of drawings:
Fig. 1 is the structural representation of the utility model one embodiment
Embodiment:
The utility model will be further described below in conjunction with drawings and Examples.
The utility model mainly comprises the rectification circuit 1 and the lighting load circuit 2 of serial connection successively, its difference with the prior art is: also comprise exchanging fixed capacity 3, one end of described interchange fixed capacity connects power supply, the other end connects rectification circuit, and the two ends that exchange fixed capacity are parallel with a discharge resistance 4.Exchange between fixed capacity and the power supply and be provided with a current-limiting resistance 5.Be connected with the LED light-emitting diode in the described lighting load circuit, described rectification circuit is a bridge rectifier.
In force; a LED light-emitting diode can be set in the lighting load circuit; also a plurality of LED light-emitting diodes (as shown in Figure 1) can be set simultaneously; but because the lighting load circuit is a prior art; here its annexation and operation principle have just been repeated no more; adopt in the lighting circuit of the present utility model during use and exchange fixed capacity; thereby not breakdown the burning of LED light-emitting diode in the protection lighting load circuit; make increase greatly the useful life of LED light-emitting diode, can reach more than 1000 hours.
Claims (4)
1. lighting circuit that is used for electrical equipment, it mainly comprises the rectification circuit and the lighting load circuit of serial connection successively, it is characterized in that: also comprise the interchange fixed capacity, one end of described interchange fixed capacity connects power supply, the other end connects rectification circuit, and the two ends that exchange fixed capacity are parallel with a discharge resistance.
2. a kind of lighting circuit that is used for electrical equipment according to claim 1 is characterized in that: exchange between fixed capacity and the power supply and be provided with a current-limiting resistance.
3. a kind of lighting circuit that is used for electrical equipment according to claim 1 is characterized in that: be connected with the LED light-emitting diode in the described lighting load circuit.
4. a kind of lighting circuit that is used for electrical equipment according to claim 1 is characterized in that: described rectification circuit is a bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020297936 CN201789655U (en) | 2010-08-19 | 2010-08-19 | Illuminating circuit for electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020297936 CN201789655U (en) | 2010-08-19 | 2010-08-19 | Illuminating circuit for electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201789655U true CN201789655U (en) | 2011-04-06 |
Family
ID=43821603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020297936 Expired - Fee Related CN201789655U (en) | 2010-08-19 | 2010-08-19 | Illuminating circuit for electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201789655U (en) |
-
2010
- 2010-08-19 CN CN 201020297936 patent/CN201789655U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20120819 |