CN201657429U - Color temperature adjustable LED illuminating device based on ambient temperature - Google Patents

Color temperature adjustable LED illuminating device based on ambient temperature Download PDF

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Publication number
CN201657429U
CN201657429U CN2010201617557U CN201020161755U CN201657429U CN 201657429 U CN201657429 U CN 201657429U CN 2010201617557 U CN2010201617557 U CN 2010201617557U CN 201020161755 U CN201020161755 U CN 201020161755U CN 201657429 U CN201657429 U CN 201657429U
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China
Prior art keywords
temperature
colour temperature
led
low
color temperature
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Expired - Fee Related
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CN2010201617557U
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Chinese (zh)
Inventor
姚涛
冯超
吴明华
陈盛峰
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WUHAN HUGE OPTOELECTRONICS CO Ltd
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WUHAN HUGE OPTOELECTRONICS CO Ltd
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Abstract

The utility model discloses a color temperature adjustable LED illuminating device based on ambient temperature, comprising a high color temperature LED chip, a low color temperature LED chip, a power supply driving circuit, a control circuit, a temperature sensor and an electronic switch, wherein the temperature sensor is connected with the control circuit; the control circuit is connected with the electronic switch; the electronic switch is connected with a high color temperature or low color temperature LED branch through the power supply driving circuit; and the high color temperature or low color temperature chip cool LED chip is arranged in the high color temperature or low color temperature LED branch. The utility model has the advantages that the color temperature of the light emitted by the LED illuminating device is automatically adjusted according to ambient temperature; the light with high color temperature and cool color tone can be emitted by the LED illuminating device under high temperature ambient, and light with low color temperature and warm color tone can be emitted by the LED illuminating device under low temperature ambient, thereby the comfortable requirement of people is met to the maximum extent. The utility model has the advantages of simple structure, low cost, simple operation and the like and has positive significance on the aspects of energy saving, environment protection and light pollution reduction.

Description

Colour temperature adjustable LED lighting device based on ambient temperature
Technical field
The utility model relates to a kind of lighting device, in the application of LED lighting field, and particularly a kind of colour temperature adjustable LED lighting device based on ambient temperature.
Background technology
Light-emitting diode (LED, Light Emitting Diode) is a kind of semiconductor device of solid luminescent, and power consumption is low, and long service life can reach 100,000 hours, and environmental protection, does not contain mercury element, is the energy-conserving and environment-protective light source of a new generation.Regulate LED brightness and often adopt pulse-width modulation (PWM, Pulse WidthModulation) technology, the duty that utilizes pwm signal to control the forward operating current of LED is recently regulated the luminosity of LED.
Colour temperature is the parameter of expression light source light spectrum quality, defines by absolute black body, and the radiation of light source is when the radiation of visual field and absolute black body is identical, and the temperature of black matrix just claims the colour temperature of this light source at this moment.It is the unit metering with kelvin absolute scale Kelvin (being abbreviated as K).The feature of low color temperature light sources is in the Energy distribution, and red radiation relative scale is higher; After colour temperature improved, in the Energy distribution, the ratio of blue radiation increased.
Color is actually the effect on a kind of psychological physic, and the generation of all colours impression is because the reaction of spectrum on eyes off and on so colour temperature is used for representing the eye impressions of color, need change colour temperature in order to change color.The changes in temperature of color are mostly to be from the experience of people to light.Colour temperature below 3300K, the photochromic red partially warm sensation of giving, red, orange, yellow isochrome is called as warm colour; Colour temperature is neutral colour temperature at 30006000K, and the people does not have especially significantly visual psychology effect under this tone, frank sensation is arranged; Colour temperature surpasses 6000K, and photochromic inclined to one side indigo plant is given chilly sensation, and blue, green, blue or green, purple etc. is called as cool colour.
The 1931CIE chromatic diagram has shown the relation between color and the colour temperature.Chromatic diagram is to be based upon on the basis that three kinds of different color reaction cells are arranged on the human eye retina.The difference response of corresponding every kind of cell, every kind color can (X, Y Z) represent with three colourity parameters.Again since in theory any color can mix with three primary colors, with normalized chromaticity coordinates (x, y, z) represent this three kinds of deals that primary colours are shared, x+y+z=1, z is by (x, y) unique definite, therefore any color can be with (x, y) point on the chromatic diagram is represented.
By photometry knowledge, can obtain colour temperature behind the mixed light by known luminaire chromaticity coordinates and brightness.With the two paths of LED is example, the colour temperature behind the calculating mixed light, and high and low colour temperature led chip chromaticity coordinates is (x respectively 1, y 1), (x 2, y 2), brightness is Y 1, Y 2, then the tristimulus values behind the mixed light is X 0, Y 0, Z 0For:
X 0 Y 0 Z 0 = x 1 y 1 , x 2 y 2 1,1 1 - x 1 - y 1 z 1 , 1 - x 2 - y 2 z 2 * Y 1 Y 2 - - - ( 1 )
Chromaticity coordinates is x 0 = X 0 X 0 + Y 0 + Z 0 - - - ( 2 )
y 0 = Y 0 X 0 + Y 0 + Z 0 - - - ( 3 )
Then can obtain corresponding colour temperature by the 1931CIE chromatic diagram.
Colour temperature is regulated and is used in the display system aspect more at present, gathers screen color temp by color temperature sensor and adjusts white balance.And at lighting field, the colour temperature of carrying out at ambient temperature is not regulated.
Summary of the invention
The purpose of this utility model is to provide a kind of colour temperature adjustable LED lighting device based on ambient temperature, and this lighting device has solved the problem that present LED lighting device can not be regulated colour temperature according to ambient temperature.
The technical solution of the utility model is: a kind of colour temperature adjustable LED lighting device based on ambient temperature, this lighting device comprises the gentle low two kinds of led chips of colour temperature of high luminance relay, power driving circuit, control circuit, temperature sensor and electronic switch, temperature sensor connects control circuit, control circuit connects electronic switch, electronic switch connects high colour temperature or low colour temperature LED branch road respectively by power driving circuit, be provided with high colour temperature or low colour temperature led chip in high colour temperature or the low colour temperature LED branch road, high colour temperature led chip colour temperature is greater than 6500K, and low colour temperature led chip colour temperature is less than 3000K.Described temperature sensor has A/D converter.Described control circuit includes the controller and the power supply peripheral circuit of band A/D translation function and PWM output function.High colour temperature or low colour temperature LED branch road can be extended to many LED branch roads, each paths of LEDs colour temperature difference.
Advantage of the present utility model is: the colour temperature that has realized regulating automatically according to ambient temperature the bright dipping of LED lighting device, under the higher environment of temperature, send the light of high luminance relay temperature, cool tone, under low temperature environment, send low colour temperature, warm-toned light, at utmost satisfy the comfort of human body.Simultaneously also can be according to user's demand change colour temperature.Have simple in structure, cheap, simple operation and other advantages, have positive effect aspect energy-conserving and environment-protective, the minimizing light pollution.
Description of drawings
Fig. 1 is the colour temperature adjustable LED lighting device circuit connection diagram of the utility model based on ambient temperature;
Fig. 2 is the schematic diagram of the utility model based on the light source of illumination device brightness of colour temperature adjustable LED and the colour temperature mapping of ambient temperature;
Fig. 3 is the colour temperature adjustable LED lighting device workflow diagram of the utility model based on ambient temperature.
Embodiment
A kind of colour temperature adjustable LED lighting device based on ambient temperature, this lighting device comprises high colour temperature led chip 5 and two kinds of led chips 6 of low colour temperature, power driving circuit 4, control circuit 2, temperature sensor 1 and electronic switch 3, temperature sensor 1 connects control circuit 2, control circuit 2 connects electronic switch 3, electronic switch 3 connects high colour temperature or low colour temperature LED branch road respectively by power driving circuit 4, be provided with high colour temperature or low colour temperature led chip 5 in high colour temperature or the low colour temperature LED branch road, 6, high colour temperature led chip 5 colour temperatures are greater than 6500K, and low colour temperature led chip 6 colour temperatures are less than 3000K.Temperature sensor 1 has A/D converter.Control circuit 2 includes the controller and the power supply peripheral circuit of band A/D translation function and PWM output function.High colour temperature or low colour temperature LED branch road can be extended to many LED branch roads, each paths of LEDs colour temperature difference.
As Fig. 2, set up the mapping relations of light-source brightness and colour temperature.By the led chip parameter, the chromaticity coordinates of low as can be known colour temperature and high colour temperature LED, obtaining obtaining under the different brightness of each branch road by above-mentioned formula (1) (2) (3) that mixed light is later can getable chromaticity coordinates, can obtain lighting device bright dipping colour temperature by the CIE1931 chromatic diagram.
Integrated structure Fig. 1 and flow chart 3, temperature sensor 1 acquisition environment temperature, inner A/D is converted to digital signal and passes to control circuit by string line, controller compares ambient temperature and preset value low value with high value, if littler,, regulate output PWM frequency by the relation of top each paths of LEDs brightness and mixed light colour temperature than low value, make lighting device send low colour temperature, warm-toned light; When bigger, regulate output PWM frequency, make lighting device send high colour temperature, the light of cool tone than high value; Ambient temperature value does not change original state 105 when setting between low value and the high value.
Electronic switch adopts metal-oxide-semiconductor, and is stable, low in energy consumption.The LED driving power is taked constant-current driving, and the pwm signal by controller output different frequency makes electronic switch open disconnection continuously, thereby realizes the control to each branch road brightness.
Being extended to the LED multi-path mixed light regulates colour temperature and can according to said method promote.

Claims (4)

1. colour temperature adjustable LED lighting device based on ambient temperature, it is characterized in that: this lighting device comprises high luminance relay gentle low colour temperature two kinds of led chips, power driving circuit, control circuit, temperature sensor and electronic switches, temperature sensor connects control circuit, control circuit connects electronic switch, electronic switch connects high colour temperature or low colour temperature LED branch road respectively by power driving circuit, be provided with high colour temperature or low colour temperature led chip in high colour temperature or the low colour temperature LED branch road, high colour temperature led chip colour temperature is greater than 6500K, and low colour temperature led chip colour temperature is less than 3000K.
2. according to the described colour temperature adjustable LED lighting device based on ambient temperature of claim 1, it is characterized in that: described temperature sensor has A/D converter.
3. according to the described colour temperature adjustable LED lighting device based on ambient temperature of claim 1, it is characterized in that: described control circuit includes the controller and the power supply peripheral circuit of band A/D translation function and PWM output function.
4. according to the described colour temperature adjustable LED lighting device based on ambient temperature of claim 1, it is characterized in that: high colour temperature or low colour temperature LED branch road can be extended to many LED branch roads, each paths of LEDs colour temperature difference.
CN2010201617557U 2010-04-12 2010-04-12 Color temperature adjustable LED illuminating device based on ambient temperature Expired - Fee Related CN201657429U (en)

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012171192A1 (en) * 2011-06-16 2012-12-20 浙江晶日照明科技有限公司 An automatic light adjusting courtyard lamp
CN103945604A (en) * 2014-04-03 2014-07-23 京东方光科技有限公司 Light adjusting method, light adjusting device, adjustable light source and display equipment
CN104797047A (en) * 2015-04-07 2015-07-22 浙江嘉乐智能技术有限公司 LED color temperature adjusting device and method based on single-channel PWM (pulse width modulation)
CN105163430A (en) * 2015-08-21 2015-12-16 无锡伊佩克科技有限公司 Temperature measurement-based color temperature adaptive adjustment illumination system
CN106814520A (en) * 2015-12-01 2017-06-09 上海傲蕊光电科技有限公司 A kind of lamp light control method for image documentation equipment
CN107197562A (en) * 2017-06-23 2017-09-22 安徽卓上光电科技有限责任公司 A kind of radio controllable LED lamp of variable color-temperature
CN107548182A (en) * 2016-06-23 2018-01-05 上海北京大学微电子研究院 The LED colour temperature self-adaptive regulatings being wirelessly transferred based on temperature feedback
CN108154865A (en) * 2017-12-05 2018-06-12 北京小米移动软件有限公司 Adjust the method and device of screen color temp
CN109548241A (en) * 2018-12-18 2019-03-29 深圳市全智芯科技有限公司 Light adjustment control method, storage medium, control device and intelligent-induction lamp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012171192A1 (en) * 2011-06-16 2012-12-20 浙江晶日照明科技有限公司 An automatic light adjusting courtyard lamp
CN103945604A (en) * 2014-04-03 2014-07-23 京东方光科技有限公司 Light adjusting method, light adjusting device, adjustable light source and display equipment
CN104797047A (en) * 2015-04-07 2015-07-22 浙江嘉乐智能技术有限公司 LED color temperature adjusting device and method based on single-channel PWM (pulse width modulation)
CN105163430A (en) * 2015-08-21 2015-12-16 无锡伊佩克科技有限公司 Temperature measurement-based color temperature adaptive adjustment illumination system
CN106814520A (en) * 2015-12-01 2017-06-09 上海傲蕊光电科技有限公司 A kind of lamp light control method for image documentation equipment
CN107548182A (en) * 2016-06-23 2018-01-05 上海北京大学微电子研究院 The LED colour temperature self-adaptive regulatings being wirelessly transferred based on temperature feedback
CN107197562A (en) * 2017-06-23 2017-09-22 安徽卓上光电科技有限责任公司 A kind of radio controllable LED lamp of variable color-temperature
CN108154865A (en) * 2017-12-05 2018-06-12 北京小米移动软件有限公司 Adjust the method and device of screen color temp
CN109548241A (en) * 2018-12-18 2019-03-29 深圳市全智芯科技有限公司 Light adjustment control method, storage medium, control device and intelligent-induction lamp

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101124

Termination date: 20160412

CF01 Termination of patent right due to non-payment of annual fee