CN107864534A - A kind of atmosphere circuit for lamp for automatically controlling brightness - Google Patents
A kind of atmosphere circuit for lamp for automatically controlling brightness Download PDFInfo
- Publication number
- CN107864534A CN107864534A CN201711233289.1A CN201711233289A CN107864534A CN 107864534 A CN107864534 A CN 107864534A CN 201711233289 A CN201711233289 A CN 201711233289A CN 107864534 A CN107864534 A CN 107864534A
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- CN
- China
- Prior art keywords
- mcu
- triode
- led
- poles
- sunlight sensor
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- 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.)
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
The present invention relates to vehicle-mounted atmosphere lamp technical field, more particularly to a kind of atmosphere circuit for lamp for automatically controlling brightness, including working power, MCU, sunlight sensor, triode and LED；Working power is electrically connected with the positive pole of the power input and LED of the MCU and sunlight sensor respectively, and respectively MCU, sunlight sensor and LED provide operating voltage；The negative pole of the LED is accessed in the c poles of triode, and the PWM port of the MCU, e poles ground connection are accessed in b poles；The analog detection port of the MCU is electrically connected with the power output end of the sunlight sensor, for detecting the magnitude of voltage exported under sunlight sensor present intensity；The PWM port of the MCU and the b poles of the triode are electrically connected with, for outputing control signals to the triode.The present invention goal of the invention be to provide a kind of atmosphere circuit for lamp for automatically controlling brightness, using technical scheme provided by the invention solve existing vehicle-mounted atmosphere lamp brightness can not with ambient brightness adjust technical problem.
Description
Technical field
The present invention relates to vehicle-mounted atmosphere lamp technical field, more particularly to a kind of atmosphere circuit for lamp for automatically controlling brightness.
Background technology
Increasing automobile increases atmosphere lamp in the car at present, and such automobile can more embody modern sense, but therewith
Some problems are brought, current most of atmosphere lamps can not all adjust the power of light in real time according to ambient light intensity, can only
According to lamp line Signal Regulation, only daytime and the two kinds of brightness used at night, often cause user to watch atmosphere lamp and pierce very much
Eye or the inadequate situation of brightness occur.
The content of the invention
The present invention goal of the invention be to provide a kind of atmosphere circuit for lamp for automatically controlling brightness, use is provided by the invention
Technical scheme solves the technical problem that existing vehicle-mounted atmosphere lamp brightness can not be adjusted with ambient brightness.
In order to solve the above-mentioned technical problem, the present invention provides a kind of atmosphere circuit for lamp for automatically controlling brightness, including work
Power supply, MCU, sunlight sensor, triode and LED；The working power respectively with the MCU and the electricity of sunlight sensor
Source input and the positive pole of the LED are electrically connected with, and respectively described MCU, sunlight sensor and LED provide work electricity
Pressure；The negative pole of the LED is accessed in the c poles of the triode, and the PWM port of the MCU, e poles ground connection are accessed in b poles；The MCU
The power output end of analog detection port and the sunlight sensor be electrically connected with, it is current for detecting the sunlight sensor
The magnitude of voltage exported under brightness；The PWM port of the MCU and the b poles of the triode are electrically connected with, for output control signal
To the triode.
Preferably, it is in series with current-limiting resistance R1 between the PWM port of the MCU and the b poles of the triode；Described
Pull down resistor R2 is accessed between current-limiting resistance R1 and the b poles of the triode.
Preferably, current-limiting resistance R3 in parallel and current limliting are sealed between the working power and the positive pole of the LED
Resistance R4.
Therefore following beneficial effect can be reached using technical scheme provided by the invention：The present invention is provided with root
The sunlight sensor of different corresponding voltage sizes is exported according to different light intensities, the output voltage of sunlight sensor is according to spoke
The numerical value for degree of penetrating linearly changes, and MCU is exported to the current value of triode b poles according to the adjustment of sunlight sensor output voltage values,
Reach regulation and flow through the effect of LED current value, and then realize that LED realizes the effect of adjustment according to light intensity, solve
The problem of atmosphere lamp brightness at present is strong and weak constant, improve the comfort level that people experiences atmosphere lamp；And in-car air-conditioner controller is present
Ready-made sunlight sensor, the road signal can be used directly, and cost is low, and the construction cycle is short.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the present invention will be implemented below
The required accompanying drawing used is briefly described in the description of example or prior art.It should be evident that drawings in the following description
Only part of the embodiment of the invention, for those of ordinary skill in the art, is not paying creative labor
Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that circuit of the embodiment of the present invention connects block diagram；
Fig. 2 is sunlight sensor structural representation of the embodiment of the present invention；
Fig. 3 is sunlight sensor internal circuit diagram of the embodiment of the present invention；
Fig. 4 is sunlight sensor of embodiment of the present invention output voltage and radiometric proportional curve；
Fig. 5 is circuit diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes.Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Current most of vehicle-mounted atmosphere lamps can not all adjust the power of light in real time according to ambient light intensity, only white
Its two kinds of brightness used with evening, often cause the user's viewing situation that atmosphere lamp is too dazzling or brightness is inadequate hair
It is raw.
In order to solve the above-mentioned technical problem, Fig. 1 is referred to, the present embodiment provides a kind of atmosphere lamp electricity for automatically controlling brightness
Road, including working power 10, MCU20, sunlight sensor 30, triode Q1 and LED D1.
The wherein positive pole with the power input and LED D1 of MCU20 and sunlight sensor 30 respectively of working power 10
It is electrically connected with, respectively MCU20, sunlight sensor 30 and LED D1 provide operating voltage.
The interface circuit of Fig. 2-3, wherein sunlight sensor 30 is referred to, is internally provided with photodiode, for gathering
Ambient light intensity, different corresponding current sizes is exported according to different light intensities, by resistance RA and RB partial pressure, A points
Different voltage Vout is exported, specific output voltage and radiometric proportional curve are referring to Fig. 4.
MCU20 analog detection port is electrically connected with the power output end of sunlight sensor 30, is passed for detecting sunlight
The magnitude of voltage exported under the present intensity of sensor 30.
MCU20 PWM port, e poles ground connection are accessed in triode Q1 c poles access LED D1 negative pole, b poles.MCU20's
PWM port and triode Q1 b poles are electrically connected with, for outputing control signals to triode Q1.
Current-limiting resistance R1 can also be in series between MCU20 PWM port and triode Q1 b poles；In current-limiting resistance
Pull down resistor R2 is accessed between R1 and triode Q1 b poles.
Current-limiting resistance R3 and current-limiting resistance R4 in parallel is sealed between working power 10 and LED D1 positive pole.
Fig. 5 is referred to, when light intensity becomes strong, sunlight sensor 30 gathers light intensity, by Fig. 4 output voltage and radiancy
Proportional curve can obtain Vout and can diminish, reduce so as to main control chip MCU20 analog detection Port detecting to voltage Vout, lead
Control chip MCU20 PWM port exports b pole of the corresponding pwm signal to triode Q1, adds triode Q1 conductings degree in Fig. 5
Greatly, so as to reduce triode Q1c pole tensions, increase the electric current for flowing through LED D1, LED D1 brightness is strengthened.
Fig. 5 is referred to, when light intensity dies down, sunlight sensor 30 gathers light intensity, by Fig. 4 output voltage and radiancy
Proportional curve can obtain Vout and can become big, become big to voltage Vout so as to main control chip MCU20 analog detection Port detecting, lead
Control chip MCU20 PWM port exports b pole of the corresponding pwm signal to triode Q1, subtracts triode Q1 conductings degree in Fig. 5
It is small, so as to increase triode Q1c pole tensions, reduce the electric current for flowing through LED D1, LED D1 brightness deteriorations.
The technical scheme that the present embodiment provides, which is provided with, exports different corresponding voltage sizes according to different light intensities
Sunlight sensor, the output voltage of sunlight sensor linearly changes according to radiometric numerical value, and MCU is according to sunlight sensor
Output voltage values adjustment output reaches the effect that LED current value is flowed through in regulation, and then realize to the current value of triode b poles
LED realizes the effect of adjustment according to light intensity, and it is constant to solve atmosphere lamp light power very well with sunlight sensor circuit
The problem of, atmosphere lamp light and shade situation can be changed according to the intensity of ambient light in real time, improve the comfort level that people experiences atmosphere lamp；
In-car air-conditioner controller typically has ready-made sunlight sensor, and the road signal can be used directly, and cost is low, the construction cycle
It is short.
Embodiments described above, the restriction to the technical scheme protection domain is not formed.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (3)
- A kind of 1. atmosphere circuit for lamp for automatically controlling brightness, it is characterised in that：Including working power, MCU, sunlight sensor, three Pole pipe and LED；The working power power input and the LED with the MCU and sunlight sensor respectively Positive pole be electrically connected with, respectively described MCU, sunlight sensor and LED provide operating voltage；The c poles of the triode connect Enter the negative pole of the LED, the PWM port of the MCU, e poles ground connection are accessed in b poles；The analog detection port of the MCU with it is described The power output end of sunlight sensor is electrically connected with, for detecting the magnitude of voltage exported under the sunlight sensor present intensity； The PWM port of the MCU and the b poles of the triode are electrically connected with, for outputing control signals to the triode.
- A kind of 2. atmosphere circuit for lamp for automatically controlling brightness according to claim 1, it is characterised in that：The MCU's Current-limiting resistance R1 is in series between PWM port and the b poles of the triode；In the current-limiting resistance R1 and the b of the triode Pull down resistor R2 is accessed between pole.
- A kind of 3. atmosphere circuit for lamp for automatically controlling brightness according to claim 2, it is characterised in that：In work electricity Current-limiting resistance R3 and current-limiting resistance R4 in parallel is sealed between source and the positive pole of the LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233289.1A CN107864534A (en) | 2017-11-30 | 2017-11-30 | A kind of atmosphere circuit for lamp for automatically controlling brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233289.1A CN107864534A (en) | 2017-11-30 | 2017-11-30 | A kind of atmosphere circuit for lamp for automatically controlling brightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107864534A true CN107864534A (en) | 2018-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711233289.1A Pending CN107864534A (en) | 2017-11-30 | 2017-11-30 | A kind of atmosphere circuit for lamp for automatically controlling brightness |
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| Country | Link |
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| CN (1) | CN107864534A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640449A (en) * | 2018-12-27 | 2019-04-16 | 惠州市德赛西威汽车电子股份有限公司 | A kind of gear indicator lamp brightness automatic control circuit based on sunlight sensor |
| CN109699103A (en) * | 2018-12-27 | 2019-04-30 | 惠州市德赛西威汽车电子股份有限公司 | A kind of gear indicator lamp brightness automatic control circuit interacted with Vehicle Controller |
| CN110401998A (en) * | 2019-08-22 | 2019-11-01 | 中山市德马汽车零部件有限公司 | A kind of glove status identification means and vehicle-mounted atmosphere lamp |
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| JP2011203171A (en) * | 2010-03-26 | 2011-10-13 | Fujitsu Ltd | Method of detecting substance and substance detecting device |
| CN106875897A (en) * | 2016-12-23 | 2017-06-20 | 惠州市德赛西威汽车电子股份有限公司 | A kind of touch-screen automatic brightness regulation circuit |
| CN206547212U (en) * | 2017-03-08 | 2017-10-10 | 北京长城华冠汽车科技股份有限公司 | The control system and vehicle of in-car atmosphere lamp |
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2017
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Patent Citations (3)
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| JP2011203171A (en) * | 2010-03-26 | 2011-10-13 | Fujitsu Ltd | Method of detecting substance and substance detecting device |
| CN106875897A (en) * | 2016-12-23 | 2017-06-20 | 惠州市德赛西威汽车电子股份有限公司 | A kind of touch-screen automatic brightness regulation circuit |
| CN206547212U (en) * | 2017-03-08 | 2017-10-10 | 北京长城华冠汽车科技股份有限公司 | The control system and vehicle of in-car atmosphere lamp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640449A (en) * | 2018-12-27 | 2019-04-16 | 惠州市德赛西威汽车电子股份有限公司 | A kind of gear indicator lamp brightness automatic control circuit based on sunlight sensor |
| CN109699103A (en) * | 2018-12-27 | 2019-04-30 | 惠州市德赛西威汽车电子股份有限公司 | A kind of gear indicator lamp brightness automatic control circuit interacted with Vehicle Controller |
| CN110401998A (en) * | 2019-08-22 | 2019-11-01 | 中山市德马汽车零部件有限公司 | A kind of glove status identification means and vehicle-mounted atmosphere lamp |
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Application publication date: 20180330 |
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