CN201220626Y - PWM type lighteness adjustable module group for LED automobile tail lamp - Google Patents
PWM type lighteness adjustable module group for LED automobile tail lamp Download PDFInfo
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- CN201220626Y CN201220626Y CNU2008200577856U CN200820057785U CN201220626Y CN 201220626 Y CN201220626 Y CN 201220626Y CN U2008200577856 U CNU2008200577856 U CN U2008200577856U CN 200820057785 U CN200820057785 U CN 200820057785U CN 201220626 Y CN201220626 Y CN 201220626Y
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Abstract
The utility model discloses a PWM-type brightness adjustable LED module group for a tail light of a vehicle. The module group comprises a base plate, an LED luminescent module, a constant current drive module and a failure detection module; a detection resistance is in serial connection with each branch circuit of the LED luminescent module, and diodes are used for forming an AND gate module to detect the current of each branch circuit, and the failure detection module is used to detect system failure, and reports the system failure to a BCM module on the vehicle when the system failure occurs so as to lead a driver to be aware of the working condition of the tail light, and reduce traffic accidents because of failure to identify the failure of the tail light; and meanwhile, a clock chip U3 of a PWM generation module is used for generating a fixed PWM pulse width, and the PWM generation module is used for transferring the pulse width to the constant current drive module to effectively adjust the brightness of the LED, thereby effectively controlling the brightness in vehicle braking or travelling, avoiding failure to operate by the LED luminescent module because of an insufficient vehicle-borne voltage or over-current damage to the LED luminescent module as a result of an overhigh vehicle-borne voltage, facilitating the recognition of vehicle travelling or braking signals, and achieving the aim of the utility model.
Description
Technical field
The utility model relates to a kind of LED tail light for vehicle module, particularly a kind of PWM formula adjustable brightness LED tail light for vehicle module of regulating LED brightness by the PWM pulsewidth.
Background technology
At present, traditional automobile tail light all are to adopt filament lamp or electricity-saving lamp as light source, add red, Yellow filter cover, realize red, yellow two kinds of light display signals; But, since the factors such as defective of filament lamp or electricity-saving lamp self, the luminance range of these class automobile tail light of great majority, and damage rate is higher, and service life is shorter, and consumption of current is big, and the row that causes thus, Parking defective are brought very big potential safety hazard to arteries of communication.
Simultaneously, owing to advantages such as LED has high brightness, low energy consumption, anti-vibration, volume is little, the exciter response time is short just more and more are applied on the automobile tail light.Existing LED automobile tail light mainly with many groups LED light emitting diode combined as light source, be used to overcome the deficiency of above-mentioned orthodox car taillight, light source and circuit that it mainly comprises luminous plaque and is fixed on the luminous plaque inboard by adapter plate, described light source is by turning to two zones in district and taillight and stoplight stop lamp district to form, and the design in this three functions two districts has compact conformation, and lamp body is ultra-thin, beautiful design, advantages such as streamline is outstanding, does not need reflex reflector, and fitting depth is shallow.
But existing LED automobile tail light do not have corresponding failure detector, when a LED is downright bad, may influence output of whole LED automobile tail light single-piece light shape and light quantity output, cause danger to driving; And existing LED automobile tail light can not work under the situation of operating voltage deficiency, and LED itself is very responsive to change of voltage, and small voltage increase may cause all that the electric current of LED heightens and cause that LED damages.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of PWM formula adjustable brightness LED tail light for vehicle module, remedy the weak point of existing LED automobile tail light, when breaking down, can report an error automatically, and can control the brightness of LED effectively, the influence that not changed by vehicle-mounted voltage.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
A kind of PWM formula adjustable brightness LED tail light for vehicle module comprises substrate and LED light emitting module, and it is characterized in that it also comprises: one for described LED light emitting module provides drive current, the constant-current driven module of the current constant of the described LED light emitting module that guarantees to flow through; And a working condition that is used to detect described LED light emitting module, and when described LED light emitting module breaks down, the fault detection module of output alarm signal.
PWM formula adjustable brightness LED tail light for vehicle module of the present utility model comprises that also one produces pwm signal and signal is input to the PWM generation module of described constant-current driven module, and the pwm signal that described constant-current driven module produces by described PWM generation module is regulated the output brightness of described LED light emitting module.
Described constant-current driven module comprises chip for driving U1, zener diode D2, capacitor C 2～C4, chemical capacitor C1, C8, resistance R 1, R9, R10 and diode D1; The voltage of input is by zener diode D2 voltage stabilizing, after chemical capacitor C8, diode D1, capacitor C 2, chemical capacitor C1 and capacitor C 3 filtering, be input among the chip for driving U1, output driving current is in described LED light emitting module again for chip for driving U1, and it is luminous to drive described LED light emitting module.
Described fault detection module comprises detection resistance R 2～R8, diode D6～D13, resistance R 19, R20, R25, chemical capacitor C9 and aerotron T1, T6; Detecting resistance R 2～R8 is connected on every group of LED of described LED light emitting module, resistance R 19 is connected the input end of described LED light emitting module, export with aerotron T1 conducting, by aerotron T1 output alarm signal by diode D13 by diode D6～D12 transmission signals.
Described PWM generation module comprises clock chip U3, switching diode D4, D5, zener diode D3, capacitor C 5, C6, C7 and resistance R 11～R18; Carry pwm signal by switching diode D5 to the chip for driving U1 of described constant-current driven module by clock chip U3.
PWM formula adjustable brightness LED tail light for vehicle module of the present utility model, on each branch road of described LED light emitting module, connect one and detect resistance by described fault detection module is set, detect the fault that the electric current of each branch road comes checking system with diode configuration Cheng Yumen module, report an error when mistake appears in system, for automobile BCM module, make chaufeur when driving, know the working condition of taillight, can reduce the traffic accident that causes because not finding the fault of taillight; Simultaneously by described PWM generation module is set, produce fixing PWM pulsewidth by the clock chip U3 of described PWM generation module and be transferred to the brightness that described constant-current driven module is effectively regulated LED, brightness during actv. control brake/driving, avoid causing described LED light emitting module not work/overcurrent damage owing to vehicle-mounted voltage below level/too high, driving/speed-slackening signal is better differentiated, and realizes the purpose of this utility model.
Description of drawings
Fig. 1 is the structured flowchart of PWM formula adjustable brightness LED tail light for vehicle module of the present utility model;
Fig. 2 is the schematic circuit diagram of PWM formula adjustable brightness LED tail light for vehicle module of the present utility model.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of PWM formula adjustable brightness LED tail light for vehicle module is made of LED light emitting module 1, constant-current driven module 2, fault detection module 3 and PWM generation module 4; Constant-current driven module 2 is connected with LED light emitting module 1, for LED light emitting module 1 provides drive current, and the current constant of the LED light emitting module 1 that guarantees to flow through; Fault detection module 3 is connected with LED light emitting module 1, is used to detect the working condition of LED light emitting module 1, when LED light emitting module 1 breaks down, and output alarm signal; PWM generation module 4 is connected with constant-current driven module 2, is produced pwm signal and pwm signal is input to constant-current driven module 2 by PWM generation module 4, and the pwm signal that constant-current driven module 2 produces by PWM generation module 4 is regulated the output brightness of LED light emitting module 1.
As shown in Figure 2, LED light emitting module 1 is made of light-emitting diode D14～D27 and resistance R 29～R35, resistance R 29 connects light-emitting diode D14 successively, D15, resistance R 30 connects light-emitting diode D16 successively, D17, resistance R 31 connects light-emitting diode D18 successively, D19, resistance R 32 connects light-emitting diode D20 successively, D21, resistance R 33 connects light-emitting diode D22 successively, D23, resistance R 34 connects light-emitting diode D24 successively, D25, resistance R 35 connects light-emitting diode D26 successively, D27, resistance R 29, R30, R31, R32, R33, R34, the other end of R35 is connected to each other and is connected to 7 pin of constant-current driven module 2, provides drive current by constant-current driven module 2.
Constant-current driven module 2 comprises chip for driving U1, zener diode D2, capacitor C 2～C4, chemical capacitor C1, C8, resistance R 1, R9, R10 and diode D1; Voltage signal is by Vbat and the input of GND port, port Vbat connects the positive pole of zener diode D2, chemical capacitor C8 and diode D1 successively, port GND is connected with the other end of zener diode D2 and ground connection, the negative pole of diode D1 connects capacitor C 2, power supply+12, chemical capacitor C1, capacitor C 3 and resistance R 1 successively and inserts 1 pin of chip for driving U1, the other end ground connection of capacitor C 2, chemical capacitor C1 and capacitor C 3, the other end of resistance R 1 connects 3 pin of chip for driving U1; The 4 pin ground connection of chip for driving U1,5 pin of chip for driving U1 connect resistance R 10, R9 successively and insert fault detection module 3, the other end of resistance R 10, R9 is connected to each other back ground connection, and 6 pin of chip for driving U1 are by capacitor C 4 ground connection, and 7 pin of chip for driving U1 insert LED light emitting module 1; The voltage of input is by zener diode D2 voltage stabilizing, after chemical capacitor C8, diode D1, capacitor C 2, chemical capacitor C1 and capacitor C 3 filtering, be input among the chip for driving U1, output driving current is in LED light emitting module 1 again for chip for driving U1, and driving LED light emitting module 1 is luminous.
During work, drive current by constant-current driven module 2 control system, the flow through current constant (meet LED like this supplied character is arranged) of LED light-emitting diode in the LED light emitting module 1 of assurance, one of the series connection of going up of each LED branch road detects the working condition that resistance detects every paths of LEDs.If LED is working properly, certain voltage (resistance has electric current to flow through) is arranged so on diode D13, be output as this voltage signal on the fault detection module 3 detected detection resistance of forming by diode and aerotron, this signal has driven aerotron T1 conducting, so external fault alarm pin (EF) level draw ground (representing working properly); If any paths of LEDs breaks down, then this road no current flows through, the diode detection on this road is 0 to detecting ohmically voltage, at this moment be output as 0V voltage at the D13 diode, aerotron T1 ends, utmost point pipe is in high-impedance state, and external circuit is drawn high this pin level, thereby external circuit detects this signal to chaufeur enforcement warning like this.The pwm signal that the PWM generation module produces is input to the PWM input pin of constant-current driven module 2, and constant-current driven module 2 is recently regulated the output brightness of LED light-emitting diode in the LED light emitting module 1 by the duty of this PWM.
More than show and described groundwork of the present utility model and principal character and advantage thereof.The technical personnel of the industry should be understood; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1, a kind of PWM formula adjustable brightness LED tail light for vehicle module, comprise substrate and LED light emitting module, it is characterized in that it also comprises: one for described LED light emitting module provides drive current, the constant-current driven module of the current constant of the described LED light emitting module that guarantees to flow through; And a working condition that is used to detect described LED light emitting module, and when described LED light emitting module breaks down, the fault detection module of output alarm signal.
2, PWM formula adjustable brightness LED tail light for vehicle module according to claim 1, it is characterized in that: it comprises that also one produces pwm signal and signal is input to the PWM generation module of described constant-current driven module, and the pwm signal that described constant-current driven module produces by described PWM generation module is regulated the output brightness of described LED light emitting module.
3, PWM formula adjustable brightness LED tail light for vehicle module according to claim 1, it is characterized in that: described constant-current driven module comprises chip for driving U1, zener diode D2, capacitor C 2～C4, chemical capacitor C1, C8, resistance R 1, R9, R10 and diode D1; The voltage of input is by zener diode D2 voltage stabilizing, after chemical capacitor C8, diode D1, capacitor C 2, chemical capacitor C1 and capacitor C 3 filtering, be input among the chip for driving U1, output driving current is in described LED light emitting module again for chip for driving U1, and it is luminous to drive described LED light emitting module.
4, PWM formula adjustable brightness LED tail light for vehicle module according to claim 1 is characterized in that: described fault detection module comprises detection resistance R 2～R8, diode D6～D13, resistance R 19, R20, R25, chemical capacitor C9 and aerotron T1, T6; Detecting resistance R 2～R8 is connected on every group of LED of described LED light emitting module, resistance R 19 is connected the input end of described LED light emitting module, export with aerotron T1 conducting, by aerotron T1 output alarm signal by diode D13 by diode D6～D12 transmission signals.
5, PWM formula adjustable brightness LED tail light for vehicle module according to claim 1, it is characterized in that: described PWM generation module comprises clock chip U3, switching diode D4, D5, zener diode D3, capacitor C 5, C6, C7 and resistance R 11～R18; Carry pwm signal by switching diode D5 to the chip for driving U1 of described constant-current driven module by clock chip U3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200577856U CN201220626Y (en) | 2008-04-28 | 2008-04-28 | PWM type lighteness adjustable module group for LED automobile tail lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200577856U CN201220626Y (en) | 2008-04-28 | 2008-04-28 | PWM type lighteness adjustable module group for LED automobile tail lamp |
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| CN201220626Y true CN201220626Y (en) | 2009-04-15 |
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| CNU2008200577856U Expired - Lifetime CN201220626Y (en) | 2008-04-28 | 2008-04-28 | PWM type lighteness adjustable module group for LED automobile tail lamp |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101863254A (en) * | 2010-06-30 | 2010-10-20 | 奇瑞汽车股份有限公司 | System and method for managing automobile power |
| WO2010142057A1 (en) * | 2009-06-08 | 2010-12-16 | 建兴电子科技股份有限公司 | Light emitting diode driving equipment and driving method |
| CN102014552A (en) * | 2009-12-30 | 2011-04-13 | 凹凸电子（武汉）有限公司 | Driving circuit of vehicle-mounted light source, control method and equilibrium controller |
| CN101875328B (en) * | 2009-04-29 | 2012-07-04 | 海洋王照明科技股份有限公司 | Marker light device for locomotive |
| CN104302079A (en) * | 2014-09-26 | 2015-01-21 | 哈尔滨威帝电子股份有限公司 | Automotive compartment lamp with fault detecting and brightness adjusting function |
| US20150327345A1 (en) * | 2010-05-11 | 2015-11-12 | Arkalumen Inc. | Methods and apparatus for causing leds to generate light output comprising a modulated signal |
| CN105807177A (en) * | 2016-03-22 | 2016-07-27 | 科博达技术有限公司 | Method detecting short circuit fault of car atmosphere lamp |
| CN106332372A (en) * | 2016-10-18 | 2017-01-11 | 威海金丰电子有限公司 | Area array LED rail transit vehicle illuminating lamp with PWM dimming function |
| US9775211B2 (en) | 2015-05-05 | 2017-09-26 | Arkalumen Inc. | Circuit and apparatus for controlling a constant current DC driver output |
| US9918362B2 (en) | 2011-03-25 | 2018-03-13 | Arkalumen Inc. | Control unit and lighting apparatus including light engine and control unit |
| CN107820345A (en) * | 2017-10-31 | 2018-03-20 | 马瑞利汽车零部件(芜湖)有限公司 | A kind of low-temp low-pressure taillight diagnostic system of LED-based drive circuit |
| US9992829B2 (en) | 2015-05-05 | 2018-06-05 | Arkalumen Inc. | Control apparatus and system for coupling a lighting module to a constant current DC driver |
| US9992836B2 (en) | 2015-05-05 | 2018-06-05 | Arkawmen Inc. | Method, system and apparatus for activating a lighting module using a buffer load module |
| US10225904B2 (en) | 2015-05-05 | 2019-03-05 | Arkalumen, Inc. | Method and apparatus for controlling a lighting module based on a constant current level from a power source |
| CN109743813A (en) * | 2019-01-17 | 2019-05-10 | 南京品畅科技发展有限公司 | A kind of PWM control RGB lamp realizes the system and method for color transition |
| CN110027466A (en) * | 2019-03-20 | 2019-07-19 | 丽清汽车科技(上海)有限公司 | A kind of intelligence detecting of automobile and taillight control system and its control method |
| US10568180B2 (en) | 2015-05-05 | 2020-02-18 | Arkalumen Inc. | Method and apparatus for controlling a lighting module having a plurality of LED groups |
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2008
- 2008-04-28 CN CNU2008200577856U patent/CN201220626Y/en not_active Expired - Lifetime
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| CN101875328B (en) * | 2009-04-29 | 2012-07-04 | 海洋王照明科技股份有限公司 | Marker light device for locomotive |
| WO2010142057A1 (en) * | 2009-06-08 | 2010-12-16 | 建兴电子科技股份有限公司 | Light emitting diode driving equipment and driving method |
| CN102014552A (en) * | 2009-12-30 | 2011-04-13 | 凹凸电子（武汉）有限公司 | Driving circuit of vehicle-mounted light source, control method and equilibrium controller |
| CN102014552B (en) * | 2009-12-30 | 2011-12-14 | 凹凸电子（武汉）有限公司 | Driving circuit of vehicle-mounted light source, control method and equilibrium controller |
| US9510420B2 (en) * | 2010-05-11 | 2016-11-29 | Arkalumen, Inc. | Methods and apparatus for causing LEDs to generate light output comprising a modulated signal |
| US20150327345A1 (en) * | 2010-05-11 | 2015-11-12 | Arkalumen Inc. | Methods and apparatus for causing leds to generate light output comprising a modulated signal |
| CN101863254B (en) * | 2010-06-30 | 2013-04-10 | 奇瑞汽车股份有限公司 | System and method for managing automobile power |
| CN101863254A (en) * | 2010-06-30 | 2010-10-20 | 奇瑞汽车股份有限公司 | System and method for managing automobile power |
| US10568170B2 (en) | 2011-03-25 | 2020-02-18 | Arkalumen Inc. | Lighting apparatus with a plurality of light engines |
| US10939527B2 (en) | 2011-03-25 | 2021-03-02 | Arkalumen Inc. | Light engine configured to be between a power source and another light engine |
| US10251229B2 (en) | 2011-03-25 | 2019-04-02 | Arkalumen Inc. | Light engine and lighting apparatus with first and second groups of LEDs |
| US9918362B2 (en) | 2011-03-25 | 2018-03-13 | Arkalumen Inc. | Control unit and lighting apparatus including light engine and control unit |
| US10757784B2 (en) | 2011-07-12 | 2020-08-25 | Arkalumen Inc. | Control apparatus and lighting apparatus with first and second voltage converters |
| CN104302079A (en) * | 2014-09-26 | 2015-01-21 | 哈尔滨威帝电子股份有限公司 | Automotive compartment lamp with fault detecting and brightness adjusting function |
| US10225904B2 (en) | 2015-05-05 | 2019-03-05 | Arkalumen, Inc. | Method and apparatus for controlling a lighting module based on a constant current level from a power source |
| US9992829B2 (en) | 2015-05-05 | 2018-06-05 | Arkalumen Inc. | Control apparatus and system for coupling a lighting module to a constant current DC driver |
| US9992836B2 (en) | 2015-05-05 | 2018-06-05 | Arkawmen Inc. | Method, system and apparatus for activating a lighting module using a buffer load module |
| US9775211B2 (en) | 2015-05-05 | 2017-09-26 | Arkalumen Inc. | Circuit and apparatus for controlling a constant current DC driver output |
| US11083062B2 (en) | 2015-05-05 | 2021-08-03 | Arkalumen Inc. | Lighting apparatus with controller for generating indication of dimming level for DC power source |
| US10568180B2 (en) | 2015-05-05 | 2020-02-18 | Arkalumen Inc. | Method and apparatus for controlling a lighting module having a plurality of LED groups |
| CN105807177B (en) * | 2016-03-22 | 2018-10-30 | 科博达技术股份有限公司 | Automobile atmosphere lamp short circuit failure detection method |
| CN105807177A (en) * | 2016-03-22 | 2016-07-27 | 科博达技术有限公司 | Method detecting short circuit fault of car atmosphere lamp |
| CN106332372B (en) * | 2016-10-18 | 2017-11-07 | 威海金丰电子有限公司 | Face matrix LED rail traffic vehicles illuminator with PWM dimming functions |
| CN106332372A (en) * | 2016-10-18 | 2017-01-11 | 威海金丰电子有限公司 | Area array LED rail transit vehicle illuminating lamp with PWM dimming function |
| CN107820345A (en) * | 2017-10-31 | 2018-03-20 | 马瑞利汽车零部件(芜湖)有限公司 | A kind of low-temp low-pressure taillight diagnostic system of LED-based drive circuit |
| CN109743813A (en) * | 2019-01-17 | 2019-05-10 | 南京品畅科技发展有限公司 | A kind of PWM control RGB lamp realizes the system and method for color transition |
| US10759338B1 (en) | 2019-03-20 | 2020-09-01 | Laser Tech Automotive (Shanghai) Co., Ltd. | Intelligent detection and tail light control system for automobiles and control method thereof |
| CN110027466A (en) * | 2019-03-20 | 2019-07-19 | 丽清汽车科技(上海)有限公司 | A kind of intelligence detecting of automobile and taillight control system and its control method |
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| CX01 | Expiry of patent term |