CN100527623C - LED open circuit by-pass circuit - Google Patents
LED open circuit by-pass circuit Download PDFInfo
- Publication number
- CN100527623C CN100527623C CNB2005101368825A CN200510136882A CN100527623C CN 100527623 C CN100527623 C CN 100527623C CN B2005101368825 A CNB2005101368825 A CN B2005101368825A CN 200510136882 A CN200510136882 A CN 200510136882A CN 100527623 C CN100527623 C CN 100527623C
- Authority
- CN
- China
- Prior art keywords
- led
- triode
- overvoltage
- circuit
- stabilizing didoe
- 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
Links
Images
Abstract
The LED open-circuit by-pass circuit to provide by-pass for LED with broken fault comprises: a LED, and a parallel over-voltage conduction circuit with ends connected with LED positive/negative end respectively. When the by-pass circuit working in series, if some LED breaks, the parallel over-voltage conduction circuit will automatic conduct to ensure the current not stop while other fault-free LED working normally. This invention improves the reliability for LED application in series.
Description
Technical field
The present invention relates to a kind of LED open circuit by-pass circuit, the LED current bypass of open circuit fault can will take place in it.
Background technology
At present, LED has obtained using comparatively widely in fields such as lamp decoration, demonstrations, also begins in the application of lighting field.These are used is that a plurality of LED series connection are used mostly, though can reduce cost life-saving, the efficient of raising LED power supply like this.But the series connection of LED is used and is also had a bigger problem, and when the LED of series connection has one open circuit fault takes place, other LED of series connection with it also will cut off the power supply, and will be no longer luminous, and can reduce greatly with the series LED like this is the various reliability of products of light source.
Summary of the invention
In order to overcome in the LED series connection use because one damage influences the deficiency of entire circuit, the invention provides a kind of LED open circuit by-pass circuit, when open circuit fault took place for some LED, other LED still can operate as normal, can significantly reduce maintenance cost like this, reduce cost.Simultaneously also improved power LED whole reliability in the series connection application process big.
The present invention addresses the above problem the technical scheme that is adopted to be: LED and overvoltage turning circuit have been composed in parallel the LED open circuit by-pass circuit, it is characterized in that, overvoltage turning circuit in the parallel connection respectively at the two ends of each LED of tandem working, the positive pole of LED is connected with an end of overvoltage turning circuit, and the negative pole of LED is connected with the other end of overvoltage turning circuit.When a certain LED internal break in the tandem working, the electric current that flows through this LED stops immediately, and the voltage at its two ends can raise, and when voltage was elevated to a certain numerical value, the overvoltage turning circuit in parallel with it can automatic conducting, thereby whole road circuit is worked on.
Described overvoltage turning circuit is made up of resistance R, capacitor C, voltage stabilizing didoe DW and controllable silicon SCR, wherein the positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW and a utmost point of controllable silicon SCR, the negative pole of LED is connected with an end and the end of filter capacitor C and another utmost point of controllable silicon SCR of sample resistance R, and the positive pole of voltage stabilizing didoe DW is connected with the other end and the other end of filter capacitor C and the control utmost point G of controllable silicon SCR of sample resistance R.
Described overvoltage turning circuit is made up of resistance R, capacitor C, voltage stabilizing didoe DW and controllable silicon SCR, wherein the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW and a utmost point of controllable silicon SCR, the positive pole of LED is connected with an end and the end of filter capacitor C and another utmost point of controllable silicon SCR of sample resistance R, and the negative pole of voltage stabilizing didoe DW is connected with the other end and the other end of filter capacitor C and the control utmost point G of controllable silicon SCR of sample resistance R.
Described overvoltage turning circuit is made up of resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2, wherein the positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW and the emitter of triode Q1, the negative pole of LED is connected with an end and the end of filter capacitor C and the emitter of triode Q2 of sample resistance R, the other end of the positive pole of voltage stabilizing didoe DW and sample resistance R, the other end of filter capacitor C, the base stage of the collector electrode of triode Q1 and triode Q2 is connected.The base stage of triode Q1 is connected with the collector electrode of triode Q2.
Described overvoltage turning circuit is made up of resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2, wherein the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW and the emitter of triode Q2, the positive pole of LED is connected with an end and the end of filter capacitor C and the emitter of triode Q1 of sample resistance R, the other end of the negative pole of voltage stabilizing didoe DW and sample resistance R, the other end of filter capacitor C, the collector electrode of the base stage of triode Q1 and triode Q2 is connected.The collector electrode of triode Q1 is connected with triode Q2 base stage.
Described overvoltage turning circuit is by resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2 form, the positive pole of the negative pole of LED and voltage stabilizing didoe DW wherein, the emitter of triode Q2, one end of resistance R is connected with the end of filter capacitor C, the positive pole of LED is connected with the emitter of triode Q1, the negative pole of voltage stabilizing didoe DW is connected with the base stage of triode Q1 and the collector electrode of triode Q2, the base stage of the collector electrode of triode Q1 and triode Q2, the other end of the other end of resistance R and filter capacitor C is connected.
Described overvoltage turning circuit is by resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2 form, the negative pole of the positive pole of LED and voltage stabilizing didoe DW wherein, the emitter of triode Q1, one end of resistance R is connected with the end of filter capacitor C, the negative pole of LED is connected with the emitter of triode Q2, the positive pole of voltage stabilizing didoe DW is connected with the collector electrode of triode Q1 and the base stage of triode Q2, the collector electrode of the base stage of triode Q1 and triode Q2, the other end of the other end of resistance R and filter capacitor C is connected.
Described overvoltage turning circuit is in series by several diodes, and wherein the positive pole of LED is connected with the anode of series diode, and the negative pole of LED is connected with the negative terminal of series diode.
Because the present invention has set up the overvoltage turning circuit in parallel with it on the LED of tandem working, when some or the inner generation of several LED open circuit fault, the overvoltage turning circuit meeting automatic conducting in parallel with it, thereby guarantee that the electric current in the series circuit can not cut off, other trouble-free LED still can operate as normal, improve great power LED whole reliability in the series connection application process like this, given full play to the service efficiency of other LED.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is the circuit diagram of the embodiment of the invention 1
Fig. 3 is the circuit diagram of the embodiment of the invention 2
Fig. 4 is the circuit diagram of the embodiment of the invention 3
Fig. 5 is the circuit diagram of the embodiment of the invention 4
Fig. 6 is the circuit diagram of the embodiment of the invention 5
Fig. 7 is the circuit diagram of the embodiment of the invention 6
Fig. 8 is the circuit diagram of the embodiment of the invention 7
Embodiment
As shown in Figure 1, the present invention includes LED1 and overvoltage turning circuit 2.Wherein the positive pole of LED1 is connected with an end of overvoltage turning circuit 2, and the negative pole of LED1 is connected with the other end of overvoltage turning circuit 2.When open circuit in LED1 inside, the voltage at its two ends can rise, and is higher than the forward voltage drop of LED1; When voltage was raised to a certain value, the overvoltage turning circuit 2 meetings automatic conducting in parallel with it promptly became conducting state by cut-off state.Under the situation that the internal break fault of LED1 is not excluded or under the fault LED1 situation about not being replaced, as long as the LED1 both end voltage is raised to certain numerical value, overvoltage turning circuit 2 conducting automatically, make LED1 by bypass, thereby guarantee that other LED that connect with LED1 can not quit work because of indivedual the damage.
In embodiment illustrated in fig. 2, the LED open circuit by-pass circuit comprises LED, voltage stabilizing didoe DW, sample resistance R, filter capacitor C and controllable silicon SCR.Wherein the positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW and a utmost point of controllable silicon SCR, the negative pole of LED is connected with an end and the end of filter capacitor C and another utmost point of controllable silicon SCR of sample resistance R, and the positive pole of voltage stabilizing didoe DW is connected with the other end and the other end of filter capacitor C and the control utmost point G of controllable silicon SCR of sample resistance R.By voltage stabilizing didoe DW, the overvoltage that sample resistance R and filter capacitor C form detects circuits for triggering and has formed the overvoltage turning circuit jointly by the turning circuit that controllable silicon SCR is formed.When the LED internal break, this LED no longer includes electric current and flows through, and the voltage at its two ends can rise rapidly; When the LED both end voltage is raised to the reverse breakdown voltage of voltage stabilizing didoe DW, voltage stabilizing didoe reverse-conducting, breakdown current flow through DW and R, and on R, produce voltage; When the voltage on the R reaches the trigger voltage of controllable silicon SCR, the rapid conducting of controllable silicon SCR; In case the controllable silicon SCR conducting just no longer ends, and just can make it get back to cut-off state after only cutting off the electricity supply.Under the situation that the open fault of LED is not excluded or the LED that opens a way is not replaced, as long as the LED both end voltage is raised to certain numerical value, the controllable silicon SCR conducting that will be triggered, thus play the effect of bypass fault LED.
In the embodiment shown in fig. 3, the LED open circuit by-pass circuit comprises LED, voltage stabilizing didoe DW, sample resistance R, filter capacitor C and controllable silicon SCR.Wherein the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW and a utmost point of controllable silicon SCR, the positive pole of LED is connected with an end and the end of filter capacitor C and another utmost point of controllable silicon SCR of sample resistance R, and the negative pole of voltage stabilizing didoe DW is connected with the other end and the other end of filter capacitor C and the control utmost point G of controllable silicon SCR of sample resistance R.By voltage stabilizing didoe DW, the overvoltage that sample resistance R and filter capacitor C form detects circuits for triggering and has formed the overvoltage turning circuit jointly by the turning circuit that controllable silicon SCR is formed.When the LED internal break, this LED no longer includes electric current and flows through, and the voltage at its two ends can rise rapidly; When the LED both end voltage is raised to the reverse breakdown voltage of voltage stabilizing didoe DW, voltage stabilizing didoe reverse-conducting, breakdown current flow through DW and R, and on R, produce voltage; When the voltage on the R reaches the trigger voltage of controllable silicon SCR, the rapid conducting of controllable silicon SCR; In case the controllable silicon SCR conducting just no longer ends, and just can make it get back to cut-off state after only cutting off the electricity supply.Under the situation that the open fault of LED is not excluded or the LED that opens a way is not replaced, as long as the LED both end voltage is raised to certain numerical value, the controllable silicon SCR conducting that will be triggered, thus play the effect of bypass fault LED.
In the embodiment shown in fig. 4, the LED open circuit by-pass circuit comprises LED, voltage stabilizing didoe DW, sample resistance R, filter capacitor C, triode Q1 and triode Q2.Wherein the positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW and the emitter of triode Q1, the negative pole of LED is connected with an end and the end of filter capacitor C and the emitter of triode Q2 of sample resistance R, the other end of the positive pole of voltage stabilizing didoe DW and sample resistance R, the other end of filter capacitor C, the base stage of the collector electrode of triode Q1 and triode Q2 is connected.The base stage of triode Q1 is connected with the collector electrode of triode Q2.By voltage stabilizing didoe DW, the overvoltage that sample resistance R and filter capacitor C form detects circuits for triggering and has formed the overvoltage turning circuit jointly by the turning circuit that triode Q1, triode Q2 form.When the LED internal break, this LED no longer includes electric current and flows through, and the voltage at its two ends can rise rapidly; When the LED both end voltage is raised to the reverse breakdown voltage of voltage stabilizing didoe DW, voltage stabilizing didoe reverse-conducting, breakdown current flow through DW and R, and on R, produce voltage; When the voltage on the R reaches the trigger voltage of the turning circuit of being made up of triode Q1 and triode Q2, turning circuit generation positive feedback and conducting rapidly; In case the turning circuit conducting just no longer ends, and just can make it get back to cut-off state after only cutting off the electricity supply.Under the situation that the open fault of LED is not excluded or the LED that opens a way is not replaced, as long as the LED both end voltage is raised to certain numerical value, the overvoltage turning circuit will conducting, thereby plays the effect of bypass fault LED.
In the embodiment shown in fig. 5, the LED open circuit by-pass circuit comprises LED, voltage stabilizing didoe DW, sample resistance R, filter capacitor C, triode Q1 and triode Q2.Wherein the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW and the emitter of triode Q2, the positive pole of LED is connected with an end and the end of filter capacitor C and the emitter of triode Q1 of sample resistance R, the other end of the negative pole of voltage stabilizing didoe DW and sample resistance R, the other end of filter capacitor C, the collector electrode of the base stage of triode Q1 and triode Q2 is connected.The collector electrode of triode Q1 is connected with triode Q2 base stage.By voltage stabilizing didoe DW, the overvoltage that sample resistance R and filter capacitor C form detects circuits for triggering and has formed the overvoltage turning circuit jointly by the turning circuit that triode Q1, triode Q2 form.When the LED internal break, this LED no longer includes electric current and flows through, and the voltage at its two ends can rise rapidly; When the LED both end voltage is raised to the reverse breakdown voltage of voltage stabilizing didoe DW, voltage stabilizing didoe reverse-conducting, breakdown current flow through DW and R, and on R, produce voltage; When the voltage on the R reaches the trigger voltage of the turning circuit of being made up of triode Q1 and triode Q2, turning circuit generation positive feedback and conducting rapidly; In case the turning circuit conducting just no longer ends, and just can make it get back to cut-off state after only cutting off the electricity supply.Under the situation that the open fault of LED is not excluded or the LED of opening a way is not replaced, as long as the LED both end voltage is raised to certain numerical value, the overvoltage turning circuit will conducting, thereby plays the effect of bypass fault LED.
In the embodiment shown in fig. 6, the LED open circuit by-pass circuit comprises LED, voltage stabilizing didoe DW, sample resistance R, filter capacitor C, triode Q1 and triode Q2.The positive pole of the negative pole of LED and voltage stabilizing didoe DW wherein, the emitter of triode Q2, one end of resistance R and an end of capacitor C are connected, the positive pole of LED is connected with the emitter of triode Q1, and the negative pole of voltage stabilizing didoe DW is connected with the base stage of triode Q1 and the collector electrode of triode Q2.The collector electrode of triode Q1 is connected with base stage and the other end of resistance R and the other end of filter capacitor C of triode Q2.When the LED internal break, this LED no longer includes electric current and flows through, and the voltage at its two ends can rise rapidly; When the LED both end voltage is raised to the reverse breakdown voltage of voltage stabilizing didoe DW, voltage stabilizing didoe reverse-conducting, breakdown current flow through emitter junction and the voltage stabilizing didoe DW of triode Q1; Breakdown current produces voltage on resistance R after Q1 amplifies; Q2 conducting when the voltage on the R reaches the forward voltage drop of triode Q2 emitter junction in case the Q2 conducting can impel the further conducting of Q1 again, finally makes Q1, Q2 enter the saturation conduction state.In case Q1, Q2 conducting just no longer end, and just can make it get back to cut-off state after only cutting off the electricity supply.Under the situation that the open fault of LED is not excluded or the LED of opening a way is not replaced, as long as the LED both end voltage is raised to certain numerical value, the overvoltage turning circuit will conducting, thereby plays the effect of bypass fault LED.
In the embodiment shown in fig. 7, the LED open circuit by-pass circuit comprises LED, voltage stabilizing didoe DW, sample resistance R, filter capacitor C, triode Q1 and triode Q2.The negative pole of the positive pole of LED and voltage stabilizing didoe DW wherein, the emitter of triode Q1, an end of resistance R and an end of capacitor C are connected; The negative pole of LED is connected with the emitter of triode Q2, and the positive pole of voltage stabilizing didoe DW is connected with the collector electrode of triode Q1 and the base stage of triode Q2.The base stage of triode Q1 is connected with collector electrode and the other end of resistance R and the other end of filter capacitor C of triode Q2.When the LED internal break, this LED no longer includes electric current and flows through, and the voltage at its two ends can rise rapidly; When the LED both end voltage is raised to the reverse breakdown voltage of voltage stabilizing didoe DW, the flow through emitter junction of voltage stabilizing didoe DW and triode Q2 of voltage stabilizing didoe reverse-conducting, breakdown current; Breakdown current produces voltage on resistance R after Q2 amplifies; Q1 conducting when the voltage on the R reaches the forward voltage drop of triode Q1 emitter junction in case the Q1 conducting can impel the further conducting of Q2 again, finally makes Q1, Q2 enter the saturation conduction state.In case Q1, Q2 conducting just no longer end, and just can make it get back to cut-off state after only cutting off the electricity supply.Under the situation that the open fault of LED is not excluded or the LED of opening a way is not replaced, as long as the LED both end voltage is raised to certain numerical value, the overvoltage turning circuit will conducting, thereby plays the effect of bypass fault LED.
Among the embodiment, the LED open circuit by-pass circuit comprises LED and several diode in series D1～Dn as shown in Figure 8.Wherein the positive pole of LED is connected with the anode of series diode, and the negative pole of LED is connected with the negative terminal of series diode, and the forward voltage drop sum of series diode D1～Dn is higher than the forward voltage drop of LED.When LED is inner when opening circuit, the voltage at its two ends can rise, when being higher than the forward voltage drop sum of series diode D1～Dn, and series diode D1～Dn forward conduction, thus play the effect of bypass fault LED.
Claims (6)
1. LED open circuit by-pass circuit, form by LED (1) and overvoltage turning circuit (2), it is characterized in that in the two ends parallel connection of LED (1) an overvoltage turning circuit (2), the positive pole of LED (1) is connected with an end of overvoltage turning circuit (2), and the negative pole of LED (1) is connected with the other end of overvoltage turning circuit (2); Overvoltage turning circuit (2) is made up of resistance R, capacitor C, voltage stabilizing didoe DW and controllable silicon SCR; The positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW and a utmost point of controllable silicon SCR, the negative pole of LED is connected with an an end and end of capacitor C and another utmost point of controllable silicon SCR of resistance R, and the positive pole of voltage stabilizing didoe DW is connected with the other end of the other end of resistance R and capacitor C and the control utmost point G of controllable silicon SCR.
2. LED open circuit by-pass circuit, form by LED (1) and overvoltage turning circuit (2), it is characterized in that in the two ends parallel connection of LED (1) an overvoltage turning circuit (2), the positive pole of LED (1) is connected with an end of overvoltage turning circuit (2), and the negative pole of LED (1) is connected with the other end of overvoltage turning circuit (2); Overvoltage turning circuit (2) is made up of resistance R, capacitor C, voltage stabilizing didoe DW and controllable silicon SCR, the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW and a utmost point of controllable silicon SCR, the positive pole of LED is connected with an an end and end of capacitor C and another utmost point of controllable silicon SCR of resistance R, and the negative pole of voltage stabilizing didoe DW is connected with the other end of the other end of resistance R and capacitor C and the control utmost point G of controllable silicon SCR.
3. LED open circuit by-pass circuit, form by LED (1) and overvoltage turning circuit (2), it is characterized in that in the two ends parallel connection of LED (1) an overvoltage turning circuit (2), the positive pole of LED (1) is connected with an end of overvoltage turning circuit (2), and the negative pole of LED (1) is connected with the other end of overvoltage turning circuit (2); Overvoltage turning circuit (2) is made up of resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2, the positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW and the emitter of triode Q1, the negative pole of LED is connected with an an end and end of capacitor C and the emitter of triode Q2 of resistance R, the positive pole of voltage stabilizing didoe DW is connected with the other end of the other end of resistance R, capacitor C, the collector electrode of triode Q1 and the base stage of triode Q2, and the base stage of triode Q1 is connected with the collector electrode of triode Q2.
4. LED open circuit by-pass circuit, form by LED (1) and overvoltage turning circuit (2), it is characterized in that in the two ends parallel connection of LED (1) an overvoltage turning circuit (2), the positive pole of LED (1) is connected with an end of overvoltage turning circuit (2), and the negative pole of LED (1) is connected with the other end of overvoltage turning circuit (2); Overvoltage turning circuit (2) is made up of resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2, the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW and the emitter of triode Q2, the positive pole of LED is connected with an an end and end of capacitor C and the emitter of triode Q1 of resistance R, the negative pole of voltage stabilizing didoe DW is connected with the other end of the other end of resistance R, capacitor C, the base stage of triode Q1 and the collector electrode of triode Q2, and the collector electrode of triode Q1 is connected with the base stage of triode Q2.
5. LED open circuit by-pass circuit, form by LED (1) and overvoltage turning circuit (2), it is characterized in that in the two ends parallel connection of LED (1) an overvoltage turning circuit (2), the positive pole of LED (1) is connected with an end of overvoltage turning circuit (2), and the negative pole of LED (1) is connected with the other end of overvoltage turning circuit (2); Overvoltage turning circuit (2) is made up of resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2, the negative pole of LED is connected with the positive pole of voltage stabilizing didoe DW, the emitter of triode Q2, an end of resistance R and an end of capacitor C, the positive pole of LED is connected with the emitter of triode Q1, the negative pole of voltage stabilizing didoe DW is connected with the base stage of triode Q1 and the collector electrode of triode Q2, and the collector electrode of triode Q1 is connected with the base stage of triode Q2, the other end of resistance R and the other end of capacitor C.
6. LED open circuit by-pass circuit, form by LED (1) and overvoltage turning circuit (2), it is characterized in that in the two ends parallel connection of LED (1) an overvoltage turning circuit (2), the positive pole of LED (1) is connected with an end of overvoltage turning circuit (2), and the negative pole of LED (1) is connected with the other end of overvoltage turning circuit (2); Overvoltage turning circuit (2) is made up of resistance R, capacitor C, voltage stabilizing didoe DW, triode Q1 and triode Q2, the positive pole of LED is connected with the negative pole of voltage stabilizing didoe DW, the emitter of triode Q1, an end of resistance R and an end of capacitor C, the negative pole of LED is connected with the emitter of triode Q2, the positive pole of voltage stabilizing didoe DW is connected with the collector electrode of triode Q1 and the base stage of triode Q2, and the base stage of triode Q1 is connected with the collector electrode of triode Q2, the other end of resistance R and the other end of capacitor C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101368825A CN100527623C (en) | 2005-12-21 | 2005-12-21 | LED open circuit by-pass circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101368825A CN100527623C (en) | 2005-12-21 | 2005-12-21 | LED open circuit by-pass circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1790908A CN1790908A (en) | 2006-06-21 |
| CN100527623C true CN100527623C (en) | 2009-08-12 |
Family
ID=36788473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101368825A Expired - Fee Related CN100527623C (en) | 2005-12-21 | 2005-12-21 | LED open circuit by-pass circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100527623C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102076139B (en) * | 2009-11-19 | 2013-12-11 | 群康科技(深圳)有限公司 | LED lighting circuit |
| CN101706089A (en) * | 2009-12-08 | 2010-05-12 | 杨东平 | LED light-emitting chip and component thereof |
| JP5891454B2 (en) * | 2011-04-18 | 2016-03-23 | パナソニックＩｐマネジメント株式会社 | Semiconductor light-emitting element lighting device and lighting fixture using the same |
| CN107484306A (en) * | 2016-06-07 | 2017-12-15 | 深圳市光峰光电技术有限公司 | A kind of light supply apparatus and projecting apparatus |
| CN109239446B (en) * | 2018-08-03 | 2021-11-19 | 广东美的制冷设备有限公司 | Alternating-current overvoltage detection circuit, air conditioner indoor unit and control panel thereof |
-
2005
- 2005-12-21 CN CNB2005101368825A patent/CN100527623C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1790908A (en) | 2006-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100527623C (en) | LED open circuit by-pass circuit | |
| CN102780202A (en) | Overvoltage protection circuit and lamp | |
| CN201219313Y (en) | LED lamp lighting circuit with self-protecting circuit | |
| CN213991102U (en) | Constant current circuit for multi-path steering lamp | |
| CN202197098U (en) | Overvoltage protection circuit, light-emitting diode (LED) driving power supply and LED lighting device | |
| CN101977474B (en) | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance | |
| CN203071567U (en) | Linear high voltage LED drive protection circuit | |
| CN102695336A (en) | LED (light-emitting diode) lamp | |
| CN211655725U (en) | Short-circuit protection circuit with current detection function | |
| CN102510620A (en) | LED (light-emitting diode) light source module | |
| CN209526518U (en) | A kind of overvoltage crowbar and its Projecting Lamp | |
| CN203934064U (en) | A kind of multi-channel type LED driving power | |
| CN209497635U (en) | The positive and negative low-loss LED lamp driving circuit connect | |
| CN208175063U (en) | A kind of light source driving circuit and lighting device | |
| CN201383890Y (en) | Front LED lamp circuit for electric bicycle | |
| CN214101867U (en) | Overvoltage protection circuit | |
| CN218679442U (en) | Series connection LED open circuit protection circuit | |
| CN209897326U (en) | Novel one-support-two LED driving mode | |
| CN217011252U (en) | Automobile LED constant current driving circuit based on discrete device | |
| CN204408691U (en) | A kind of LED power charge/discharge control circuit | |
| CN218388016U (en) | Protection device of LED system | |
| CN202230126U (en) | Middle-high voltage electrification indicating circuit with good rectification effect | |
| CN202178573U (en) | Spike current protective circuit for light emitting diode (LED) drive | |
| CN201557283U (en) | LED energy-saving lamp with open-circuit protection | |
| CN219322616U (en) | Control circuit based on dimming LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: HEFEI YUANHUI OPTOELECTRONIC CO., LTD. Assignor: Lv Xiaofeng Contract record no.: 2011340000072 Denomination of invention: LED open circuit by-pass circuit Granted publication date: 20090812 License type: Exclusive License Open date: 20060621 Record date: 20110630 |
|
| DD01 | Delivery of document by public notice |
Addressee: Lv Xiaofeng Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Lv Xiaofeng Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Lv Xiaofeng Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20131221 |