CN103407409A - Constant current driving control system for rear view mirror steering lamp - Google Patents
Constant current driving control system for rear view mirror steering lamp Download PDFInfo
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- CN103407409A CN103407409A CN2013103726222A CN201310372622A CN103407409A CN 103407409 A CN103407409 A CN 103407409A CN 2013103726222 A CN2013103726222 A CN 2013103726222A CN 201310372622 A CN201310372622 A CN 201310372622A CN 103407409 A CN103407409 A CN 103407409A
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Abstract
The invention provides a constant current driving control system for a rear view mirror steering lamp. The constant current driving control system comprises an input module, a voltage reduction module, a current stabilization module and a light-emitting diode (LED) lamp. Voltage input by the input module is output to the LED lamp through the voltage reduction module to enable the LED lamp to be lighted up. When input voltage fluctuates, the current stabilization module enables changes of current flowing through the LED lamp to be small. Constant current driving of the automobile rear view mirror steering lamp is achieved through a simple circuit, and the problem that brightness of an automobile rear view mirror varies due to changes of the input voltage is solved. According to the constant current driving control system, the working characteristics of a voltage stabilizing diode and a metal oxide semiconductors (MOS) tube which are ordinary at present are fully utilized, the voltage stabilizing diode and the MOS tube are combined creatively, and the constant current control effect which can only be achieved through an integrated chip can be achieved merely through two elements.
Description
Technical field
The present invention relates to automobile control technology field, relate in particular to a kind of back mirror steering indicating light constant current driving control system.
Background technology
The back mirror steering indicating light refers to the steering indicating light be arranged on automobile rearview mirror, and with respect to common fender guard steering indicating light, the back mirror steering indicating light has very significantly decoration function, also has in addition relative security advantages.After side turn signal was integrated in back mirror, improved the steering indicating light position, also just more easily discovers for vehicle or the pedestrian of side, and better warning function is arranged.For the proceeds posterolateral vehicle that sails rear view mirror blind zone into, the back mirror steering indicating light of higher position can better be pointed out the vehicle in blind area, avoids the accident caused when doubling.
Existing back mirror steering indicating light patent, for example publication number is the Chinese patent of CN202283898, has only shown steering indicating light is set on back mirror, and the light of steering indicating light is controlled and do not done restriction.And for example publication number is the Chinese patent of CN202806570, only defines the minute surface angulation of LED lamp and back mirror, also the light of steering indicating light is not controlled and is made restriction.Also having is that CN102166989, publication number are that CN202080196, publication number are the Chinese patents such as CN202686153 such as publication number, those patents have all only provided on back mirror again steering indicating light have been set, to brightness how to control steering indicating light, how to guarantee that steering indicating light all do not do restriction because voltage fluctuation changes.
Summary of the invention
Technical matters to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes a kind of stable back mirror steering indicating light constant current driving control system of back mirror steering indicating light light that makes.
The present invention solves the technical scheme that its technical matters adopts, and proposes a kind of back mirror steering indicating light constant current driving control system, and it comprises load module, voltage reduction module, current stabilization module and LED lamp; The voltage of load module input exports the LED lamp to through voltage reduction module and makes the LED lamp be lit, and when input voltage fluctuation, the current stabilization module makes the curent change of the LED lamp of flowing through less.
Further, described voltage reduction module comprises resistance R 1, resistance R 2; Described current stabilization module comprises zener diode and metal-oxide-semiconductor; Described resistance R 1 one terminations enter load module, other end access metal-oxide-semiconductor grid; Described resistance R 2 one terminations enter the metal-oxide-semiconductor source class, other end ground connection; Described zener diode negative electrode access metal-oxide-semiconductor grid, plus earth; Described LED lamp anode access load module, the drain electrode of negative electrode access metal-oxide-semiconductor.
Further, also comprise the afterflow module, after input voltage cut off, the afterflow module made the LED lamp slowly extinguish.
Further, described afterflow module is electric capacity, and described electric capacity one termination enters load module, other end ground connection.
Further, also comprise diode and transient state zener diode; Described diode anode access load module, negative electrode access LED lamp anode; Described transient state zener diode one termination enters diode cathode, other end ground connection.
The present invention has realized that by simple circuit the constant current of steering lamp of automobile rearview mirror drives, and makes the brightness of automobile rearview mirror can not change because of the variation of input voltage.The present invention takes full advantage of at present common zener diode and the operating characteristic of metal-oxide-semiconductor, by the two creationary combining, makes and only needs two elements can reach the existing effect that needs constant current that integrated chip just can reach to control.
The present invention also sets up the afterflow module in circuit, after making voltage cut off, the back mirror steering indicating light slowly extinguishes, thereby makes the display effect of back mirror steering indicating light more attractive in appearance.
The accompanying drawing explanation
Fig. 1 is the functional block diagram of back mirror steering indicating light constant current driving control system in a preferred embodiment of the present invention;
Fig. 2 is the circuit diagram of back mirror steering indicating light constant current driving control system in a preferred embodiment of the present invention.
The specific embodiment
Please refer to Fig. 1, Fig. 1 is the functional block diagram of back mirror steering indicating light constant current driving control system in a preferred embodiment of the present invention.In Fig. 1, back mirror steering indicating light constant current driving control system comprises load module 10, voltage reduction module 20, current stabilization module 30 and LED lamp 40.
The voltage of load module 10 inputs exports LED lamp 40 to through voltage reduction module 20 and makes LED lamp 40 be lit.When input voltage fluctuation, current stabilization module 30 makes the curent change of the LED lamp 40 of flowing through less.
Please refer to Fig. 2, Fig. 2 is the circuit diagram of back mirror steering indicating light constant current driving control system in a preferred embodiment of the present invention.In Fig. 2, voltage reduction module 20 consists of resistance R 1 and resistance R 2, and current stabilization module 30 consists of zener diode DS2 and metal-oxide-semiconductor Q1.
Resistance R 1 and resistance R 2 play metering function in circuit, by the resistance size of regulating resistance R1 and resistance R 2, can regulate the brightness of final LED lamp.In a preferred embodiment, resistance R 1 and resistance R 2 are swept resistance, and the knob of adjustable sliding resistance size being installed at automotive interior makes the user can be according to the brightness that oneself needs vehicles back mirror steering indicating light.
Resistance R 1 one terminations enter load module, other end access metal-oxide-semiconductor Q1 grid; Resistance R 2 one terminations enter the metal-oxide-semiconductor source class, other end ground connection; Zener diode DS2 negative electrode access metal-oxide-semiconductor Q1 grid, plus earth; LED lamp anode access load module 10, negative electrode access metal-oxide-semiconductor Q1 drain electrode.
When input voltage changes, characteristic according to zener diode, the curent change that flows through zener diode is larger, but pressure drop is less, this voltage-drop loading is in the grid of metal-oxide-semiconductor Q1, therefore the operating point drift of metal-oxide-semiconductor Q1 is less, makes the curent change of the LED lamp of flowing through less, makes LED lamp brightness preservation stable.
Further, the present invention also comprises the afterflow module, and after input voltage was cut off, the afterflow module made the LED lamp can not extinguish at once, but slowly extinguishes, thereby makes the decorative effect of back mirror steering indicating light more obvious.
In the present invention, the afterflow module adopts capacitor C 1, and capacitor C 1 one terminations enter load module, other end ground connection.
During the load module input voltage, capacitor C 1 charging, and capacitor C 1 can also play the effect of filtering voltage fluctuation.After load module cut off input voltage, capacitor C 1 electric discharge, for the power supply of LED lamp, made the LED lamp slowly extinguish.
In another preferred embodiment, also comprise transient state zener diode TVS1 and diode DS1, transient state zener diode TVS1 mono-termination enters diode DS1 negative electrode, other end ground connection; Diode DS1 anode access load module 10, negative electrode access LED lamp anode.
Diode DS1 makes the electric current can only nonreturn flow, makes circuit safer.Transient diode TVS1 can prevent voltage instantaneous generation larger fluctuation and damage element.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (5)
1. a back mirror steering indicating light constant current driving control system, is characterized in that: comprise load module, voltage reduction module, current stabilization module and LED lamp; The voltage of load module input exports the LED lamp to through voltage reduction module and makes the LED lamp be lit, and when input voltage fluctuation, the current stabilization module makes the curent change of the LED lamp of flowing through less.
2. back mirror steering indicating light constant current driving control system according to claim 1, it is characterized in that: described voltage reduction module comprises resistance R 1, resistance R 2; Described current stabilization module comprises zener diode and metal-oxide-semiconductor; Described resistance R 1 one terminations enter load module, other end access metal-oxide-semiconductor grid; Described resistance R 2 one terminations enter the metal-oxide-semiconductor source class, other end ground connection; Described zener diode negative electrode access metal-oxide-semiconductor grid, plus earth; Described LED lamp anode access load module, the drain electrode of negative electrode access metal-oxide-semiconductor.
3. back mirror steering indicating light constant current driving control system according to claim 2 is characterized in that: also comprise the afterflow module, after input voltage cut off, the afterflow module made the LED lamp slowly extinguish.
4. back mirror steering indicating light constant current driving control system according to claim 3, it is characterized in that: described afterflow module is electric capacity, described electric capacity one termination enters load module, other end ground connection.
5. back mirror steering indicating light constant current driving control system according to claim 1, is characterized in that: also comprise diode and transient state zener diode; Described diode anode access load module, negative electrode access LED lamp anode; Described transient state zener diode one termination enters diode cathode, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310372622.2A CN103407409B (en) | 2013-08-23 | 2013-08-23 | A kind of back mirror steering indicating light constant current driving control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310372622.2A CN103407409B (en) | 2013-08-23 | 2013-08-23 | A kind of back mirror steering indicating light constant current driving control system |
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| CN103407409A true CN103407409A (en) | 2013-11-27 |
| CN103407409B CN103407409B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310372622.2A Active CN103407409B (en) | 2013-08-23 | 2013-08-23 | A kind of back mirror steering indicating light constant current driving control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109070793A (en) * | 2016-06-01 | 2018-12-21 | 株式会社美姿把 | Lamps and lanterns lighting system and lamp unit |
| CN110908211A (en) * | 2019-12-17 | 2020-03-24 | 深圳市光羿科技有限公司 | Electrochromic device control circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3306723A1 (en) * | 1982-03-26 | 1983-10-06 | Siemens Ag | Safety arrangement for a flasher signal generator controlled by an integrated circuit |
| CN201294664Y (en) * | 2008-10-21 | 2009-08-19 | 深圳万润科技股份有限公司 | High-efficiency LED lamp drive circuit |
| CN101815382A (en) * | 2010-04-02 | 2010-08-25 | 上海小糸车灯有限公司 | Step-down constant current LED drive circuit for automobile lighting |
| CN201821546U (en) * | 2010-09-01 | 2011-05-04 | 中山银利自动化系统设备有限公司 | LED light source driving power supply |
| CN102452352A (en) * | 2010-10-28 | 2012-05-16 | 比亚迪股份有限公司 | Detection and control circuit of LED (light-emitting diode) steering lamps and detection method thereof |
-
2013
- 2013-08-23 CN CN201310372622.2A patent/CN103407409B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3306723A1 (en) * | 1982-03-26 | 1983-10-06 | Siemens Ag | Safety arrangement for a flasher signal generator controlled by an integrated circuit |
| CN201294664Y (en) * | 2008-10-21 | 2009-08-19 | 深圳万润科技股份有限公司 | High-efficiency LED lamp drive circuit |
| CN101815382A (en) * | 2010-04-02 | 2010-08-25 | 上海小糸车灯有限公司 | Step-down constant current LED drive circuit for automobile lighting |
| CN201821546U (en) * | 2010-09-01 | 2011-05-04 | 中山银利自动化系统设备有限公司 | LED light source driving power supply |
| CN102452352A (en) * | 2010-10-28 | 2012-05-16 | 比亚迪股份有限公司 | Detection and control circuit of LED (light-emitting diode) steering lamps and detection method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109070793A (en) * | 2016-06-01 | 2018-12-21 | 株式会社美姿把 | Lamps and lanterns lighting system and lamp unit |
| CN109070793B (en) * | 2016-06-01 | 2022-08-09 | 株式会社美姿把 | Lamp lighting system and lamp unit |
| CN110908211A (en) * | 2019-12-17 | 2020-03-24 | 深圳市光羿科技有限公司 | Electrochromic device control circuit |
| CN110908211B (en) * | 2019-12-17 | 2023-05-26 | 深圳市光羿科技有限公司 | Electrochromic device control circuit |
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| Publication number | Publication date |
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| CN103407409B (en) | 2015-11-18 |
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