CN109121248A - A kind of illuminating lamp for inside of automobile - Google Patents

A kind of illuminating lamp for inside of automobile Download PDF

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Publication number
CN109121248A
CN109121248A CN201811084215.0A CN201811084215A CN109121248A CN 109121248 A CN109121248 A CN 109121248A CN 201811084215 A CN201811084215 A CN 201811084215A CN 109121248 A CN109121248 A CN 109121248A
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China
Prior art keywords
foot
voltage stabilizing
feet
led
light
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CN201811084215.0A
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Chinese (zh)
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顾敏明
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Individual
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Individual
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Priority to CN201811084215.0A priority Critical patent/CN109121248A/en
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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
    • 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]
    • H05B45/20—Controlling the colour of the light

Abstract

The present invention discloses a kind of illuminating lamp for inside of automobile, including illuminating LED lamp, Voltage stabilizing module circuit, LED drive circuit, central controller, ambient light detection circuit.Illuminating lamp for inside of automobile of the invention uses and is mixed into two kinds of white light LEDs of changes in temperature in LED light source, and adjusts colour temperature according to different Physiological and psychological requirements, obtains comfortable light, comfortable lighting environment colour temperature can satisfy the different physiology of people, psychological needs.

Description

A kind of illuminating lamp for inside of automobile
Technical field
The invention belongs to auto parts and components, in particular to a kind of automobile lamp.
Background technique
Commercial vehicle, especially tampered commercial vehicle, trunk is relatively empty spacious, it steadily comfortably takes body in addition It tests, time compact business people is suitble to carry out communication exchange, to achieve the effect that promote time availability, usual quotient in the car Business exchange when, vehicle window all can top curtain, therefore inside in light basic source in interior interior light, for high-end commercial affairs Vehicle, headlamp also have higher requirement.
The producer of refitted car at present does not consider to illuminate needs when configuring interior light, drive only with common constant current Mode, it is ineffective.Meanwhile influence of the lighting quality to people's physical and mental health is receive more and more attention, has Research shows that lighting environment has apparent influence to the physiology of people and psychology.Studies have shown that people physiology and psychoreaction by There is different influence to light source color temperature height.Cool colour light source be easy stimulation nervous system, under cool colour temperature environment the heart rate of people, Pulse accelerates, and blood pressure increases, and spirit is excited.On the contrary, warm colour light source then has relieving mood, reduces pressure, reduces the rhythm of the heart and pulse The effects of.In terms of psychological feelings, low color temperature light (warm colour light) allows people to feel warm, and high color temperature light (cool colour light) allows people to feel cold It is cold.Therefore, Lighting Design will not only consider environment to illuminate, it is also contemplated that visual comfort, builds the light environment of health.
Summary of the invention
The technical problems to be solved by the invention are to realize that one kind can carry out light adjustment according to automotive interior environment Illuminating lamp for inside of automobile.
Present invention provide the technical scheme that
A kind of illuminating lamp for inside of automobile, including illuminating LED lamp, Voltage stabilizing module circuit, LED drive circuit, central controller, Ambient light detection circuit,
Voltage stabilizing module circuit includes voltage stabilizing chip U01, and automobile power source VIN connects pull-up resistor R01 and is followed by voltage stabilizing chip U01's 1 foot, 1 foot of voltage stabilizing chip U01 are grounded after meeting filter capacitor C01, and 2 feet are grounded after meeting filter capacitor C02, after 4 feet meet capacitor C03 Connecting resistance R02, then 5 feet of voltage stabilizing chip U01 are connected to, the 5 foot connecting resistance R06 of voltage stabilizing chip U01 are followed by VOUT, while connecing drop-down It is grounded after resistance R07, the 6 feet ground connection of voltage stabilizing chip U01, while being followed by 7 feet of voltage stabilizing chip U01 through capacitor C05, connect simultaneously Filter capacitor C06 is followed by VOUT, then the 7 foot connecting resistance R04 of voltage stabilizing chip U01 meet pull down resistor R05 and are grounded again, while electricity The extraction termination metal-oxide-semiconductor Q01 connecting resistance R03 of resistance R04 is connected to 8 feet of voltage stabilizing chip U01 again, and metal-oxide-semiconductor drain electrode connects voltage-stabiliser tube D01's Anode, D01 cathode is grounded after meeting capacitor C06, while meeting VOUT, and metal-oxide-semiconductor drain electrode meets inductance L01 again and is followed by automobile power source VIN, surely 9 feet of pressure chip U01 are grounded after meeting filter capacitor C04, and 10 foot VDD meet automobile power source VIN；
LED drive circuit includes driving chip U1, and 12V power supply connects 6 feet of driving chip U1, filter capacitor C1, filtering The anode of capacitor C3 meets 12V, cathode ground connection, and the 4 foot SW of driving chip U1 are connected to 6 foot IN, while driving chip through inductance L1 The 4 foot SW of U1 connect voltage-stabiliser tube D1 anode, and voltage-stabiliser tube D1 cathode connects LED light string D2 anode, and LED light string D2 cathode meets driving chip U1 1 foot FB, wherein filter capacitor C2, filter capacitor C4 anode connect voltage-stabiliser tube D1 cathode, cathode ground connection, the 1 of driving chip U1 Foot meets 3 foot GND through pull down resistor, and 2 feet meet capacitor C5 and are followed by 3 foot GND, and 5 feet of driving chip U1 meet external central controller PWM Signal, 12V are the output VOUT for passing through Voltage stabilizing module circuit in upper section；
The method of central controller light modulation is as follows:
1) two class white light LEDs of changes in temperature, L are installed in LED light source1And L2Indicate the output under the most full current work of two kinds of LED Luminous flux, the full electric current luminous flux L of determined off-line light source1And L2；
2) same value is set by the output duty cycle of the PWM of cold, warm LED, that is, is η, according to desired light-source brightness Lmix, by the brightness relationship L of mixing light sourcemix=(L1+L2) * η, determine the duty ratio η of PWM；
3) the brightness L that central controller is set as neededmixPWM output is carried out, and according to the inspection of ambient light detection circuit Measured value carries out closed-loop control,
The method of central controller color-temperature regulating is as follows:
A, determined off-line and colour temperature, duty cycle relationship are concluded first, process is as follows:
1) according to selected cold, warm white LED lamp bead, the colour code (x of two kinds of LED lamp beads of light source is determined1, y1)、(x2, y2)；
2) the full electric current luminous flux L of two kinds of LED lamp beads of light source is measured1And L2；
3) it is associated with the control PWM wave duty cycle relationship of two kinds of LED lamp beads in light source, i.e., so that colour temperature duty ratio η1And η2's Ratio is k.
4) relation database table of colour temperature and duty ratio ratio k is established:
Wherein, the process for establishing the relation database table of colour temperature and duty ratio ratio k is as follows:
1) using k as variable, selecting incremental steps is 0.05, in value range (0.05-20), incremental calculation (xmix, ymix), calculation method is
2) according to (x under the conditions of calculated different dutymix, ymix) value, it utilizesIt calculates not With the A reciprocal of the isothermal line slope under duty cycle condition；
3) the correlated colour temperature T of the changes in temperature white light LEDs mixing light source Jing Guo PWM modulation can be calculated by following formula:
In formula: R (0)=111.9135, R (1)=- 16906.45, R (2)=12998.05, R (3)=- 2784.008, R (4)=- 954.8603, R (5)=217.3433, R (6)=82.91618, R (7)=3.384065, R (8)=- 5.5733497；Above-mentioned relation formula is tested by actual curve, is obtained via data fitting tool by curve matching mode；
4) colour temperature-duty ratio mapping table is established；
B, on-line tuning colour temperature:
1) colour temperature as needed, the ratio k of the duty ratio needed for being obtained by look-up table；
2) simultaneously, central controller meet light intensity it is equal in the case where, calculate duty ratio η1And η2；
3) central processing unit generates duty ratio η1And η2Two-way PWM output, drives LED light source, carries out color-temperature regulating.
Illuminating lamp for inside of automobile of the invention uses and is mixed into two kinds of white light LEDs of changes in temperature in LED light source, and according to different Physiological and psychological requirements adjust colour temperature, obtain comfortable light, comfortable lighting environment colour temperature can satisfy the different of people Physiology, psychological needs.
Detailed description of the invention
Whole schematic illustration Fig. 1 of the invention.
Fig. 2 Voltage stabilizing module circuit diagram of the present invention.
Fig. 3 LED drive circuit figure of the present invention.
Light modulation flow chart Fig. 4 of the invention.
Color-temperature regulating flow chart one Fig. 5 of the invention.
Color-temperature regulating flowchart 2 Fig. 6 of the invention.
Specific embodiment
Feature of present invention and operation reserve are described in further detail by embodiment below in conjunction with attached drawing:
Such as Fig. 1, a kind of illuminating lamp for inside of automobile, including illuminating LED lamp, Voltage stabilizing module circuit, LED drive circuit, center Controller, ambient light detection circuit,
In the car, cell voltage is unstable, and fluctuation is big, does not often handle input voltage in conventional design, It will cause LED lamp bead power supply meeting brightness irregularities, using effect is poor, introduces the power supply processing chip in figure 2 above, can be defeated Preferably keep output voltage direct current 12V constant in the case where entering voltage fluctuation.Compared to traditional approach power voltage step down or The mode of boosting, at the same 12v voltage regulator circuit designed by the present invention for supply voltage lower than 12V and be higher than 12V in the case where, The problem of can realizing pressure stabilizing well, overcoming vehicle power supply voltage bounce well, the efficiency of power supply is improved.
Such as Fig. 2, Voltage stabilizing module circuit includes voltage stabilizing chip U01, and automobile power source VIN connects pull-up resistor R01 and is followed by pressure stabilizing core 1 foot of piece U01,1 foot of voltage stabilizing chip U01 are grounded after meeting filter capacitor C01, and 2 feet are grounded after meeting filter capacitor C02, and 4 feet connect electricity Connecting resistance R02 after appearance C03, then 5 feet of voltage stabilizing chip U01 are connected to, the 5 foot connecting resistance R06 of voltage stabilizing chip U01 are followed by VOUT, together When meet pull down resistor R07 after be grounded, 6 feet of voltage stabilizing chip U01 ground connection, while being followed by the 7 of voltage stabilizing chip U01 through capacitor C05 Foot, while meeting filter capacitor C06 and being followed by VOUT, then the 7 foot connecting resistance R04 of voltage stabilizing chip U01 meet pull down resistor R05 and connect again Ground, while the extraction termination metal-oxide-semiconductor Q01 connecting resistance R03 of resistance R04 is connected to 8 feet of voltage stabilizing chip U01 again, metal-oxide-semiconductor drain electrode connects steady The anode of pressure pipe D01, D01 cathode is grounded after meeting capacitor C06, while meeting VOUT, and metal-oxide-semiconductor drain electrode meets inductance L01 again and is followed by automobile 9 feet of power supply VIN, voltage stabilizing chip U01 are grounded after meeting filter capacitor C04, and 10 foot VDD meet automobile power source VIN；The voltage stabilizing chip U01 is TPS40210-Q1.
Such as Fig. 3, LED drive circuit includes driving chip U1, and 12V power supply connects 6 feet of driving chip U1, filter capacitor C1, filter capacitor C3 anode meet+12V, cathode ground connection, the 4 foot SW of driving chip U1 are connected to 6 foot IN through inductance L1, simultaneously The 4 foot SW of driving chip U1 connect voltage-stabiliser tube D1 anode, and voltage-stabiliser tube D1 cathode connects LED light string D2 anode, and LED light string D2 cathode connects drive The 1 foot FB of dynamic chip U1, wherein filter capacitor C2, filter capacitor C4 anode connect voltage-stabiliser tube D1 cathode, cathode ground connection drives core 1 foot of piece U1 meets 3 foot GND through pull down resistor, and 2 feet meet capacitor C5 and are followed by 3 foot GND, and 5 feet of driving chip U1 connect external center control Device pwm signal processed, driving chip U1 switching frequency are 1.1MHz, and higher working frequency reduces output voltage ripple, are improved Transfer efficiency, and allow to reduce costs using smaller peripheral components are encapsulated, special D2 indicates white light LEDs lamp strings, It is multiple LED light series connection.
Ambient light detection circuit is used for environment inside car light detection, is acquired by silicon photocell sensor VBPW34, leads to It crosses the sensor and converts analog voltage signal for the intensity of environment light.
Suitable lighting environment colour temperature can satisfy the different physiology of people, psychological needs, in business environment, according to not With Physiological and psychological requirements seem and be even more important that it is mixed based on the double light LED of changes in temperature that the present invention is to provide one kind adjusting colour temperature Color scheme.
Method such as Fig. 4, central controller light modulation is as follows:
1) two class white light LEDs of changes in temperature, L are installed in LED light source1And L2Indicate the output under the most full current work of two kinds of LED Luminous flux measures the full electric current luminous flux L of light source1And L2；
2) same value is set by the output duty cycle of the PWM (pulse width modulation) of cold, warm LED, that is, is η, according to It is required that light-source brightness Lmix, by the brightness relationship L of mixing light sourcemix=(L1+L2) * η, determine the duty ratio η of PWM；
3) the brightness L that central controller is set as neededmixPWM output is carried out, and according to the inspection of ambient light detection circuit Measured value carries out closed-loop control,
Method such as Fig. 5, central controller color-temperature regulating is as follows:
1, determined off-line and colour temperature, duty cycle relationship are concluded first, process is as follows:
1) according to selected cold, warm white LED lamp bead, the colour code (x of two kinds of LED lamp beads of light source is determined1, y1)、(x2, y2)；
2) the full electric current luminous flux L of two kinds of white LED light sources of changes in temperature is measured1And L2；
3) it is associated with the control PWM wave duty cycle relationship of two kinds of LED lamp beads in light source, i.e., so that colour temperature duty ratio η1And η2's Ratio is k.
4) relation database table of colour temperature and duty ratio ratio k is established:
Wherein, the process for establishing the relation database table of colour temperature and duty ratio ratio k is as follows:
1) using k as variable, selecting incremental steps is 0.05, in value range (0.05-20), incremental calculation (xmix, ymix), calculation method is
2) according to (x under the conditions of calculated different dutymix, ymix) value, it utilizesIt calculates not With the A reciprocal of the isothermal line slope under duty cycle condition；
3) the correlated colour temperature T of the changes in temperature white light LEDs mixing light source Jing Guo PWM modulation is calculated by following formula:Formula In: R (0)=111.9135, R (1)=- 16906.45, R (2)=12998.05, R (3)=- 2784.008, R (4)=- 954.8603, R (5)=217.3433, R (6)=82.91618, R (7)=3.384065, R (8)=- 5.5733497；Above-mentioned pass It is that formula is tested by actual curve, is obtained via data fitting tool by curve matching mode；
4) colour temperature-duty ratio mapping table is established；
2, such as Fig. 6, on-line tuning colour temperature:
1) colour temperature as needed, the ratio k of the duty ratio needed for being obtained by look-up table；
2) simultaneously, central processing unit meet light intensity it is equal in the case where, calculate duty ratio η1And η2；
3) central controller generates duty ratio η1And η2Two-way PWM output, drives LED light source, carries out color-temperature regulating.

Claims (1)

1. a kind of illuminating lamp for inside of automobile, which is characterized in that including illuminating LED lamp, 12V Voltage stabilizing module circuit, LED driving electricity Road, central controller, ambient light detection circuit,
Voltage stabilizing module circuit includes voltage stabilizing chip U01, and automobile power source VIN connects 1 foot that pull-up resistor R01 is followed by voltage stabilizing chip U01, 1 foot of voltage stabilizing chip U01 is grounded after meeting filter capacitor C01, and 2 feet are grounded after meeting filter capacitor C02, and 4 feet meet capacitor C03 and are followed by electricity R02 is hindered, then is connected to 5 feet of voltage stabilizing chip U01, the 5 foot connecting resistance R06 of voltage stabilizing chip U01 are followed by VOUT, while connecing pull down resistor It is grounded after R07, the 6 feet ground connection of voltage stabilizing chip U01, while being followed by 7 feet of voltage stabilizing chip U01 through capacitor C05, while connecing filtering Capacitor C06 is followed by VOUT, then the 7 foot connecting resistance R04 of voltage stabilizing chip U01 meet pull down resistor R05 and are grounded again, while resistance R04 Extraction termination metal-oxide-semiconductor Q01 connecting resistance R03 be connected to 8 feet of voltage stabilizing chip U01 again, metal-oxide-semiconductor, which drains, connects the anode of voltage-stabiliser tube D01, D01 cathode is grounded after meeting capacitor C06, while meeting VOUT, and metal-oxide-semiconductor drain electrode meets inductance L01 again and is followed by automobile power source VIN, pressure stabilizing core 9 feet of piece U01 are grounded after meeting filter capacitor C04, and 10 foot VDD meet automobile power source VIN；
LED drive circuit includes driving chip U1, and 12V power supply connects 6 feet of driving chip U1, filter capacitor C1, filter capacitor The anode of C3 meets+12V, cathode ground connection, and the 4 foot SW of driving chip U1 are connected to 6 foot IN through inductance L1, while driving chip U1 4 foot SW connect voltage-stabiliser tube D1 anode, and voltage-stabiliser tube D1 cathode connects LED light string D2 anode, and LED light string D2 cathode connects the 1 of driving chip U1 Foot FB, wherein filter capacitor C2, filter capacitor C4 anode connect voltage-stabiliser tube D1 cathode, cathode ground connection, the 1 foot warp of driving chip U1 Pull down resistor meets 3 foot GND, and 2 feet meet capacitor C5 and are followed by 3 foot GND, and 5 feet of driving chip U1 connect external central controller PWM letter Number；
The method of central controller light modulation is as follows:
1) two class white light LEDs of changes in temperature, L are installed in LED light source1And L2Indicate that the output light under the most full current work of two kinds of LED is logical Amount, measures the full electric current luminous flux L of light source1And L2；
2) same value is set by the output duty cycle of the PWM of cold, warm LED, that is, is η, according to desired light-source brightness Lmix, By the brightness relationship L of mixing light sourcemix=(L1+L2) * η, determine the duty ratio η of PWM；
3) the brightness L that central controller is set as neededmixPWM output is carried out, and according to the detected value of ambient light detection circuit Closed-loop control is carried out,
The method of central controller color-temperature regulating is as follows:
A, determined off-line and colour temperature, duty cycle relationship are concluded first, process is as follows:
1) according to selected cold, warm white LED lamp bead, the colour code (x of two kinds of LED lamp beads of light source is determined1, y1)、(x2, y2)；
2) the full electric current luminous flux L of two kinds of white LED light sources of changes in temperature is measured1And L2；
3) it is associated with the control PWM wave duty cycle relationship of two kinds of LED lamp beads in light source, i.e., so that colour temperature duty ratio η1And η2Ratio For k.
4) relation database table of colour temperature and duty ratio ratio k is established:
Wherein, the process for establishing the relation database table of colour temperature and duty ratio ratio k is as follows:
1) using k as variable, selecting incremental steps is 0.05, in value range (0.05-20), incremental calculation (xmix, ymix), meter Calculation method is:
2) according to (x under the conditions of calculated different dutymix, ymix) value, it utilizesDifference is calculated to account for The A reciprocal of the empty isothermal line slope than under the conditions of；
3) the correlated colour temperature T of the changes in temperature white light LEDs mixing light source Jing Guo PWM modulation can be calculated by following formula: In formula: R (0)=111.9135, R (1)=- 16906.45, R (2)=12998.05, R (3)=- 2784.008, R (4)=- 9.54.8603, R (5)=217.3433, R (6)=82.91618, R (7)=3.384065, R (8)=- 5.5733497；It is above-mentioned Relational expression is tested by actual curve, is obtained via data fitting tool by curve matching mode；
4) colour temperature-duty ratio mapping table is established；
B, on-line tuning colour temperature:
1) colour temperature as needed, the ratio k of the duty ratio needed for being obtained by look-up table；
2) simultaneously, central controller meet light intensity it is equal in the case where, calculate duty ratio η1And η2；
3) central processing unit generates duty ratio η1And η2Two-way PWM output, drives LED light source, carries out color-temperature regulating.
CN201811084215.0A 2018-09-11 2018-09-11 A kind of illuminating lamp for inside of automobile Pending CN109121248A (en)

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Application Number Priority Date Filing Date Title
CN201811084215.0A CN109121248A (en) 2018-09-11 2018-09-11 A kind of illuminating lamp for inside of automobile

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Application Number Priority Date Filing Date Title
CN201811084215.0A CN109121248A (en) 2018-09-11 2018-09-11 A kind of illuminating lamp for inside of automobile

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CN109121248A true CN109121248A (en) 2019-01-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102711336A (en) * 2012-06-15 2012-10-03 四川新力光源有限公司 Daylight lighting simulation device
CN104768271A (en) * 2014-01-02 2015-07-08 深圳市海洋王照明工程有限公司 Automatic dimming LED constant-current driving circuit
CN204681253U (en) * 2015-06-15 2015-09-30 深圳市捷扬讯科电子有限公司 A kind of electric power system and LED power
CN106559934A (en) * 2016-11-14 2017-04-05 中车青岛四方机车车辆股份有限公司 The control method of rail vehicle lighting system, device, system and rail vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102711336A (en) * 2012-06-15 2012-10-03 四川新力光源有限公司 Daylight lighting simulation device
CN104768271A (en) * 2014-01-02 2015-07-08 深圳市海洋王照明工程有限公司 Automatic dimming LED constant-current driving circuit
CN204681253U (en) * 2015-06-15 2015-09-30 深圳市捷扬讯科电子有限公司 A kind of electric power system and LED power
CN106559934A (en) * 2016-11-14 2017-04-05 中车青岛四方机车车辆股份有限公司 The control method of rail vehicle lighting system, device, system and rail vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
胡奕彬等: "双通道PWM的冷暖白光LED混色模型研究", 《光电子.激光》 *

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