CN201178099Y - LED and thermistor of positive temperature coefficient - Google Patents
LED and thermistor of positive temperature coefficient Download PDFInfo
- Publication number
- CN201178099Y CN201178099Y CNU200720055044XU CN200720055044U CN201178099Y CN 201178099 Y CN201178099 Y CN 201178099Y CN U200720055044X U CNU200720055044X U CN U200720055044XU CN 200720055044 U CN200720055044 U CN 200720055044U CN 201178099 Y CN201178099 Y CN 201178099Y
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- led
- ptc thermistor
- emitting diode
- thermistor
- temperature coefficient
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Abstract
The utility model discloses a light emitting diode and a positive temperature coefficient thermistor. The light emitting diode comprises a positive temperature coefficient PTC thermistor; the resistance value of the positive temperature coefficient thermistor is 0.1 to 10 Omega; the Curie temperature thereof is 50 to 100 DEG C; and the PTC thermistor can adjust the current flows in the LED at different temperatures. The light emitting diode and the positive temperature coefficient thermistor have the advantages that the temperature property of the thermistor is utilized to increase the resistance value in small range is increased and reduce the current flowing in the LED and a current-limiting resistor so as to reduce power consumption and temperature rise, and prolong the service life of the LED.
Description
Technical field
The utility model relates to a kind of PTC of utilization thermistor and regulates and flow through the led current size under the different temperatures to reach the court of a feudal ruler long LED lifetime of LED purpose new technology.
Background technology
The LED light-emitting diode has been obtained breakthrough development in recent years as the development of novel illumination source material, compare with the traditional lighting product, advantages such as LED has that volume is little, power consumption is low, long-life, environmental protection and reaction speed are fast are the commodity that substitute the tool potentiality of traditional lighting utensil in over the next several years.LED life-span of throwing light under normal conditions is very long, but under hot or even superheat state its life-span can shorten greatly.The heating situation overwhelming majority of LED is caused by following three kinds of factors: 1. the temperature rise (as the sun in summer insolation) owing to environment for use causes; 2. the temperature rise that causes as pure heater element of current-limiting resistance; The heat that self internal resistance produces when 3. flowing through electric current in the LED course of work.
In existing LED design, generally adopt constant current or constant voltage mode to power to LED, this mode can cause shortening greatly the useful life of LED under ambient temperature rising situation.
Summary of the invention
The purpose of this utility model is to provide a kind of light-emitting diode, and the PTC thermistor that this light-emitting diode and its matched can solve short problem of existing light-emitting diode high ambient temperature following life-span of situation.
The purpose of this utility model is achieved through the following technical solutions: a kind of light-emitting diode, described light-emitting diode comprises positive temperature coefficient PTC thermistor, the resistance of described semistor is 0.1-10 Ω, Curie temperature is 50-100 ℃, and described PTC thermistor can be regulated the size of current that flows through LED under the varying environment temperature.
The technical solution of the utility model also comprises: described light-emitting diode, it is characterized in that: described PTC thermistor is placed between two radiators, and the rated operational current or the PTC thermistor itself that utilize radiator to increase the PTC thermistor also can reach certain rated operational current.
The technical solution of the utility model also comprises: described light-emitting diode is characterized in that: described radiator passes through to conduct electricity gluing or the tin cream welding links to each other with the PTC thermistor, and the radiator two ends are as two electrodes of PTC thermistor.
The technical solution of the utility model also comprises: the resistance of described PTC thermistor is 0.1-10 Ω, and Curie temperature is 50-100 ℃.
A kind of semistor, the resistance of described semistor are 0.1-10 Ω, and Curie temperature is 50-100 ℃.
Technique effect of the present utility model is: light-emitting diode of the present utility model and semistor utilize the temperature characterisitic of thermistor, make its resistance after ambient temperature surpasses the nominal operation temperature, do slightly to raise, reduce the electric current flow through LED and current-limiting resistance and reduce power consumption and reduce temperature rise again, prolong the useful life of LED.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Description of drawings
Fig. 1 is the semistor structural representation of light-emitting diode of the present utility model;
Fig. 2 is another structural representation of the semistor of light-emitting diode of the present utility model.
Embodiment
Light-emitting diode of the present utility model adopts the PTC thermistor to regulate the electric current that flows through LED, utilize the temperature characterisitic of thermistor, make its resistance after ambient temperature surpasses the nominal operation temperature, do slightly to raise, reduce the electric current that flows through LED and current-limiting resistance and reduce power consumption and reduce temperature rise again.The rated operational current of PTC thermistor be meant under official hour and temperature conditions, do not cause the PTC thermistor present high-impedance state maximum current.When being lower than a certain proportion of electric current of rated current and flowing through the PTC thermistor, the height that the height of PTC thermistor ambient temperature of living in will have influence on PTC thermistor resistance value changes, cause flowing through the variation of LED and current-limiting resistance electric current thereof, have influence on power consumption again and have influence on ambient temperature, make it to be in a poised state.
In 0.1-10 Ω scope, radiator increases its rated operational current to the utility model employing Curie temperature or itself also can reach the PTC thermistor of certain rated operational current by adding, and sees also Fig. 1 and Fig. 2 in resistance between 50-100 ℃.At Fig. 1, PTC thermistor 1 is placed between two radiators 2.Radiator 2 passes through to conduct electricity gluing or the tin cream welding links to each other with PTC thermistor 1.In Fig. 2, PTC thermistor 1 has two pins 3.
Specific embodiment of this programme: Normal Environmental Temperature as 50 ℃ with interior when adding 5VDC voltage, the electric current that flows through PTC thermistor and current-limiting resistance LED is 360mA.This moment, the internal resistance of PTC thermistor was 1 Ω, when ambient temperature rises to 60 ℃, because the thermistor resistance rises with the rising of ambient temperature.The thermistor resistance rises 3 Ω.The electric current of whole LED circuit will be reduced to 314.7mA by 360mA this moment, and the reduction of this electric current has reduced the power consumption of entire circuit undoubtedly and regulated the ambient temperature of LED and prolong its useful life.
The utility model can be applied to LED illuminating industry, LED advertising sector, LED control system etc.
The above is a preferred embodiments of the present utility model only, is not to be used to limit protection range of the present utility model.Anyly be familiar with those skilled in the art in the technical scope that the utility model discloses, the variation that can expect easily all should be encompassed within the protection range of the present utility model.
Claims (4)
1, a kind of semistor is characterized in that: the resistance of described semistor is 0.1-10 Ω, and Curie temperature is 50-100 ℃.
2, a kind of light-emitting diode, it is characterized in that: described light-emitting diode comprises positive temperature coefficient PTC thermistor, the resistance of described semistor is 0.1-10 Ω, and Curie temperature is 50-100 ℃, and described PTC thermistor is regulated the electric current that flows through LED under the different temperatures.
3, light-emitting diode as claimed in claim 2 is characterized in that: described PTC thermistor is placed between two radiators, and described radiator increases the rated operational current of PTC thermistor.
4, light-emitting diode as claimed in claim 3 is characterized in that: described radiator passes through to conduct electricity gluing or the tin cream welding links to each other with the PTC thermistor, and the radiator two ends are as two electrodes of PTC thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720055044XU CN201178099Y (en) | 2007-08-03 | 2007-08-03 | LED and thermistor of positive temperature coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720055044XU CN201178099Y (en) | 2007-08-03 | 2007-08-03 | LED and thermistor of positive temperature coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201178099Y true CN201178099Y (en) | 2009-01-07 |
Family
ID=40218124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720055044XU Expired - Fee Related CN201178099Y (en) | 2007-08-03 | 2007-08-03 | LED and thermistor of positive temperature coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201178099Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666442A (en) * | 2009-05-20 | 2010-03-10 | 北京中庆微数字设备开发有限公司 | Automatic temperature-control LED hose lamp |
| CN102003628A (en) * | 2009-05-14 | 2011-04-06 | 北京中庆微数字设备开发有限公司 | Automatic temperature control LED pixel tube |
-
2007
- 2007-08-03 CN CNU200720055044XU patent/CN201178099Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003628A (en) * | 2009-05-14 | 2011-04-06 | 北京中庆微数字设备开发有限公司 | Automatic temperature control LED pixel tube |
| CN101666442A (en) * | 2009-05-20 | 2010-03-10 | 北京中庆微数字设备开发有限公司 | Automatic temperature-control LED hose lamp |
| CN101666442B (en) * | 2009-05-20 | 2014-06-04 | 北京中庆微数字设备开发有限公司 | Automatic temperature-control LED hose lamp |
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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: 20090107 |