CN103889090A - Light emitting diode light-mixing method and light-emitting device - Google Patents
Light emitting diode light-mixing method and light-emitting device Download PDFInfo
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- CN103889090A CN103889090A CN201210553773.3A CN201210553773A CN103889090A CN 103889090 A CN103889090 A CN 103889090A CN 201210553773 A CN201210553773 A CN 201210553773A CN 103889090 A CN103889090 A CN 103889090A
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Abstract
The invention relates to a light emitting diode light-mixing method. The method comprises the following steps that: a substrate is provided and a red-light light-emitting diode, a green-light light-emitting diode, and a blue-light light-emitting diode are arranged at the substrate; an input power supply is provided and respectively provides power for the red-light light-emitting diode, the green-light light-emitting diode, and the blue-light light-emitting diode; a rising temperature delta T1 of the red-light light-emitting diode under the input power supply effect, a rising temperature delta T2 of the green-light light-emitting diode under the input power supply effect, and a rising temperature delta T3 of the blue-light light-emitting diode under the input power supply effect are calculated; and according to the delta T1, the delta T2 and the delta T3, the input currents of the red-light light-emitting diode, the green-light light-emitting diode, and the blue-light light-emitting diode are respectively adjusted. According to the light mixing method, the input currents can be reduced without the need to wait for temperature rising of the light-emitting diodes, so that the timely responding effect is realized. In addition, the invention also provides a light-emitting device applying the light emitting diode light-mixing method.
Description
Technical field
The present invention relates to a kind of light emitting diode light mixing method and apply the light-emitting device of above-mentioned light emitting diode light mixing method.
Background technology
Light-emitting diode (Light Emitting Diode, LED) is a kind of optoelectronic semiconductor component that current conversion can be become to particular range of wavelengths.The advantages such as light-emitting diode is high with its brightness, operating voltage is low, power consumption is little, it is simple easily to mate with integrated circuit, drive, the life-span is long, thus can be used as light source and be widely used in lighting field.
In the application process of light-emitting diode, conventionally adopt red light-emitting diode, green light LED and blue light-emitting diode mixed light and form white light.Because the wavelength of the light of light-emitting diode can change with the change of temperature, set temperature sensor on light-emitting diode conventionally.In the time that luminous diode temperature rises, reduce the input current of light-emitting diode.But said method is the input current that just reduces light-emitting diode after luminous diode temperature rises, its course of reaction has delay.
Summary of the invention
In view of this, be necessary to provide a kind of response light emitting diode light mixing method and apply the light-emitting device of above-mentioned light emitting diode light mixing method comparatively timely.
A kind of light emitting diode light mixing method, comprises the following steps:
A circuit board is provided, on described circuit board, is provided with red light-emitting diode, green light LED and blue light-emitting diode;
An input power is provided, is respectively red light-emitting diode, green light LED and blue light-emitting diode power supply;
Calculate the temperature Δ T1 that red light-emitting diode rises under input power effect, the temperature Δ T3 that the temperature Δ T2 that green light LED rises under input power effect and blue light-emitting diode rise under input power effect; And
According to Δ T1, Δ T2 and Δ T3 adjust respectively red light-emitting diode, the input current of green light LED and blue light-emitting diode.
A kind of light-emitting device, comprising:
Illuminating module, comprises circuit board and is arranged on the red light-emitting diode on circuit board, green light LED and blue light-emitting diode;
Input power, is respectively red light-emitting diode, green light LED and blue light-emitting diode power supply; And
Control device, be electrically connected with illuminating module and input power, described control device calculates the temperature Δ T1 that red light-emitting diode rises under input power effect, the temperature Δ T3 that the temperature Δ T2 that green light LED rises under input power effect and blue light-emitting diode rise under input power effect, then according to Δ T1, Δ T2 and Δ T3 adjust respectively red light-emitting diode, the input current of green light LED and blue light-emitting diode.
In above-mentioned LED light mixing method and light-emitting device, the size rising according to luminous diode temperature is adjusted its input current., in the time that input power increases, thereby the heat that light-emitting diode sends increase causes its temperature rise.Now, thus corresponding minimizing makes its mixed light balance to its input current.Above-mentioned light mixing method does not need to wait the ability until luminous diode temperature rises to adjust its input current, responds effect timely thereby have.
Accompanying drawing explanation
Fig. 1 is the structural representation of the light-emitting device that provides of the embodiment of the present invention.
Fig. 2 is the structural representation of the illuminating module in Fig. 1.
Fig. 3 is the schematic flow sheet of the light emitting diode light mixing method that provides of the embodiment of the present invention.
Main element symbol description
| Light-emitting device | 10 |
| Illuminating module | 11 |
| |
111 |
| Red light- |
112 |
| |
113 |
| Blue light- |
114 |
| |
115 |
| |
12 |
| Control device | 13 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to diagram, the present invention is further detailed.
Refer to Fig. 1-2, the light-emitting device 10 that the embodiment of the present invention provides comprises illuminating module 11, input power 12 and control device 13.
Described illuminating module 11 comprises substrate 111 and is arranged on the red light-emitting diode 112 on substrate 111, green light LED 113 and blue light-emitting diode 114.Described input power 12 is respectively red light-emitting diode 112, and green light LED 113 and blue light-emitting diode 114 are powered and made it luminous.
Control device 13 is electrically connected with illuminating module 11 and input power 12.Described control device 13 calculates the temperature Δ T1 that red light-emitting diode 112 rises under input power 12 effects, the temperature Δ T3 that the temperature Δ T2 that green light LED 113 rises under input power 12 effects and blue light-emitting diode 114 rise under input power 12 effects.Then according to temperature rise Δ T1, Δ T2 and Δ T3 adjust respectively red light-emitting diode 112, the input current of green light LED 113 and blue light-emitting diode 114., in the time that input power 12 increases the input power of red light-emitting diode 112, thereby the caloric value of red light-emitting diode 112 will increase and causes its temperature rise.And temperature rise will be to causing red light-emitting diode 112 emission wavelengths to change, thereby change the ratio between ruddiness and green glow and blue light in illuminating module 11.Now, thus input current that can corresponding minimizing red light-emitting diode 112 makes scale dimension between ruddiness, green glow and the blue light weighing apparatus that maintains an equal level.Correspondingly, in the time that input power 12 increases the input power of green light LED 113 or blue light-emitting diode 114, described control device 13 also can corresponding minimizing green light LED 113 or the input current of blue light-emitting diode 114 and make scale dimension between ruddiness, green glow and the blue light weighing apparatus that maintains an equal level.
In the present embodiment, at the temperature rise Δ T1 that calculates red light-emitting diode 112, when the temperature rise Δ T3 of the temperature rise Δ T2 of green light LED 113 and blue light-emitting diode 114, can first calculate the heat Q1 that red light-emitting diode 112 produces under the effect of input power 12, the heat Q3 that the heat Q2 that green light LED 113 produces under the effect of input power 12 and blue light-emitting diode 114 produce under the effect of input power 12, and then according to produced heat Q1, Q2 and Q3 calculate respectively red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, Δ T2 and Δ T3.Wherein, in above-mentioned computational process, first test the thermal resistance R of red light-emitting diode 112
r, the thermal resistance R of green light LED 113
gand the thermal resistance R of blue light-emitting diode 114
b.The numerical value R of described thermal resistance
r, R
g, R
brepresent that the heat of 1W can cause the size of temperature rise.Now, red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*R
R；ΔT2?=?Q2*R
G；ΔT3?=?Q3*R
B。
As required, the contact interface at red light-emitting diode 112 with substrate 111, is also respectively arranged with welding flux layer 115 at green light LED 113 with the contact interface of substrate 111 and at blue light-emitting diode 114 and the contact interface of substrate 111.Now, calculating red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, when Δ T2 and Δ T3, first tests out the thermal resistance R of welding flux layer 115
s, then red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*(R
R+R
S)；ΔT2?=?Q2*(R
G+R
S)；ΔT3?=?Q3*(R
B+R
S)。
The present invention also provides a kind of light emitting diode light mixing method.Please also refer to Fig. 3, described light emitting diode light mixing method comprises the following steps.
A substrate 111 is provided, on described substrate 111, is provided with red light-emitting diode 112, green light LED 113 and blue light-emitting diode 114.
An input power 12 is provided, is respectively red light-emitting diode 112, green light LED 113 and blue light-emitting diode 114 and powers.
Calculate the temperature Δ T1 that red light-emitting diode 112 rises under input power 12 effects, the temperature Δ T3 that the temperature Δ T2 that green light LED 113 rises under input power 12 effects and blue light-emitting diode 114 rise under input power 12 effects.
According to the temperature rise Δ T1 of red light-emitting diode 112, Δ T2 and Δ T3 adjust respectively red light-emitting diode 112, the input current of green light LED 113 and blue light-emitting diode 114.
In above-mentioned light emitting diode light mixing method, at the temperature rise Δ T1 that calculates red light-emitting diode 112, when the temperature rise Δ T3 of the temperature rise Δ T2 of green light LED 113 and blue light-emitting diode 114, can first calculate the heat Q1 that red light-emitting diode 112 produces under the effect of input power 12, the heat Q3 that the heat Q2 that green light LED 113 produces under the effect of input power 12 and blue light-emitting diode 114 produce under the effect of input power 12, and then according to produced heat Q1, Q2 and Q3 calculate respectively red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, Δ T2 and Δ T3.Wherein, in above-mentioned computational process, first test the thermal resistance R of red light-emitting diode 112
r, the thermal resistance R of green light LED 113
gand the thermal resistance R of blue light-emitting diode 114
b.Now, red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*R
R；ΔT2?=?Q2*R
G；ΔT3?=?Q3*R
B。
As required, the contact interface at red light-emitting diode 112 with substrate 111, can also arrange respectively welding flux layer 115 at green light LED 113 with the contact interface of substrate 111 and at blue light-emitting diode 114 and the contact interface of substrate 111.Now, calculating red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, when Δ T2 and Δ T3, first tests out the thermal resistance R of welding flux layer 115
s, then red light-emitting diode 112, the temperature rise Δ T1 of green light LED 113 and blue light-emitting diode 114, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*(R
R+R
S)；ΔT2?=?Q2*(R
G+R
S)；ΔT3?=?Q3*(R
B+R
S)。
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection range that all should belong to the claims in the present invention with distortion.
Claims (8)
1. a light emitting diode light mixing method, comprises the following steps:
A substrate is provided, on described substrate, is provided with red light-emitting diode, green light LED and blue light-emitting diode;
An input power is provided, is respectively red light-emitting diode, green light LED and blue light-emitting diode power supply;
Calculate the temperature Δ T1 that red light-emitting diode rises under input power effect, the temperature Δ T3 that the temperature Δ T2 that green light LED rises under input power effect and blue light-emitting diode rise under input power effect; And
According to Δ T1, Δ T2 and Δ T3 adjust respectively red light-emitting diode, the input current of green light LED and blue light-emitting diode.
2. light emitting diode light mixing method as claimed in claim 1, it is characterized in that, at the temperature rise Δ T1 that calculates red light-emitting diode, in the temperature rise Δ T3 of the temperature rise Δ T2 of green light LED and blue light-emitting diode, first calculate the heat Q1 that red light-emitting diode produces, the heat Q3 that the heat Q2 that green light LED produces and blue light-emitting diode produce, and then according to produced heat Q1, Q2 and Q3 calculate respectively red light-emitting diode, the temperature rise Δ T1 of green light LED and blue light-emitting diode, Δ T2 and Δ T3.
3. light emitting diode light mixing method as claimed in claim 2, is characterized in that, the thermal resistance R of test red light-emitting diode
r, the thermal resistance R of green light LED
gand the thermal resistance R of blue light-emitting diode
b, red light-emitting diode, the temperature rise Δ T1 of green light LED and blue light-emitting diode, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*R
R；ΔT2?=?Q2*R
G；ΔT3?=?Q3*R
B。
4. light emitting diode light mixing method as claimed in claim 3, is characterized in that, respectively at red light-emitting diode, between green light LED and blue light-emitting diode and circuit board, welding flux layer is set, and tests the thermal resistance R of described welding flux layer
s, red light-emitting diode, the temperature rise Δ T1 of green light LED and blue light-emitting diode, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*(R
R+R
S)；ΔT2?=?Q2*(R
G+R
S)；ΔT3?=?Q3*(R
B+R
S)。
5. a light-emitting device, comprising:
Illuminating module, comprises substrate and is arranged on the red light-emitting diode on substrate, green light LED and blue light-emitting diode;
Input power, is respectively red light-emitting diode, green light LED and blue light-emitting diode power supply; And
Control device, be electrically connected with illuminating module and input power, described control device calculates the temperature Δ T1 that red light-emitting diode rises under input power effect, the temperature Δ T3 that the temperature Δ T2 that green light LED rises under input power effect and blue light-emitting diode rise under input power effect, then according to Δ T1, Δ T2 and Δ T3 adjust respectively red light-emitting diode, the input current of green light LED and blue light-emitting diode.
6. light-emitting device as claimed in claim 5, it is characterized in that, at the temperature rise Δ T1 that calculates red light-emitting diode, in the temperature rise Δ T3 of the temperature rise Δ T2 of green light LED and blue light-emitting diode, first calculate the heat Q1 that red light-emitting diode produces, the heat Q3 that the heat Q2 that green light LED produces and blue light-emitting diode produce, and then according to produced heat Q1, Q2 and Q3 calculate respectively red light-emitting diode, temperature rise Δ T1, Δ T2 and the Δ T3 of green light LED and blue light-emitting diode.
7. light-emitting device as claimed in claim 6, is characterized in that, the thermal resistance R of test red light-emitting diode
r, the thermal resistance R of green light LED
gand the thermal resistance R of blue light-emitting diode
b, red light-emitting diode, the temperature rise Δ T1 of green light LED and blue light-emitting diode, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*R
R；ΔT2?=?Q2*R
G；ΔT3?=?Q3*R
B。
8. light-emitting device as claimed in claim 7, is characterized in that, respectively at red light-emitting diode, between green light LED and blue light-emitting diode and circuit board, welding flux layer is set, and tests the thermal resistance R of described welding flux layer
s, red light-emitting diode, the temperature rise Δ T1 of green light LED and blue light-emitting diode, Δ T2 and Δ T3 calculate by following formula:
ΔT1?=?Q1*(R
R+R
S)；ΔT2?=?Q2*(R
G+R
S)；ΔT3?=?Q3*(R
B+R
S)。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210553773.3A CN103889090B (en) | 2012-12-19 | 2012-12-19 | Light emitting diode light mixing method and light-emitting device |
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|---|---|---|---|
| CN201210553773.3A CN103889090B (en) | 2012-12-19 | 2012-12-19 | Light emitting diode light mixing method and light-emitting device |
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| CN103889090A true CN103889090A (en) | 2014-06-25 |
| CN103889090B CN103889090B (en) | 2017-07-07 |
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|---|---|---|---|---|
| CN104505389A (en) * | 2014-12-24 | 2015-04-08 | 广州市鸿利光电股份有限公司 | LED (Light Emitting Diode) light-mixing method and LED device |
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| US7638754B2 (en) * | 2005-10-07 | 2009-12-29 | Sharp Kabushiki Kaisha | Backlight device, display apparatus including backlight device, method for driving backlight device, and method for adjusting backlight device |
| RU2009120466A (en) * | 2006-10-31 | 2010-12-10 | Конинклейке Филипс Электроникс Н.В (Nl) | LIGHT SOURCE ON LIGHT-RADIATING ELEMENTS AND TEMPERATURE CONTROL SYSTEM DESIGNED FOR IT |
| JP4525767B2 (en) * | 2008-02-14 | 2010-08-18 | ソニー株式会社 | Lighting device and display device |
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| CN104505389A (en) * | 2014-12-24 | 2015-04-08 | 广州市鸿利光电股份有限公司 | LED (Light Emitting Diode) light-mixing method and LED device |
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