CN108235517A - A kind of lighting driving device for protecting eyesight - Google Patents
A kind of lighting driving device for protecting eyesight Download PDFInfo
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- CN108235517A CN108235517A CN201810071331.2A CN201810071331A CN108235517A CN 108235517 A CN108235517 A CN 108235517A CN 201810071331 A CN201810071331 A CN 201810071331A CN 108235517 A CN108235517 A CN 108235517A
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- led light
- light group
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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
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention relates to it is a kind of protect eyesight lighting driving device, including：First LED light group, to provide primary illumination；Second LED light group and third LED light group, the two auxiliary provide illumination, when the brightness of the first LED groups cannot reach preset requirement, to provide the illumination of sufficient intensity in order；Wherein, first LED light group is connected separately with the first luminous flux sensor, to measure the luminous flux of the first LED light group in real time, and feeds back in control unit；First current regulating circuit, under the control of the control unit, to control the luminous flux of the first LED light group, make it in preset range.By way of the present invention single circuit, single LED light group compared to being adjusted, the regulative mode of the present invention, the range bigger of the light flux values of adjusting, more particularly to realize coarse adjustment and precisely adjust two processes, multiple constant light flux values can be set, to be realized respectively by the adjustment of multi-level pmultistage circuit.
Description
Technical field
The present invention relates to lighting device technical field more particularly to a kind of lighting driving devices for protecting eyesight.
Background technology
At present, light emitting diode (LED) due to its long lifespan, little power consumption, light efficiency it is high, easily controllable and environmentally protective etc. special
Point is just gradually being applied to the fields such as road lighting, office lighting, lighting of home, industrial lighting, agricultural illumination.People utilize LED
Good outgoing light wavelength monochromaticjty, by combining the LED chip of different outgoing wavelength and/or the LED core of similary outgoing wavelength
The methods of piece but the LED encapsulation using different phosphor material powders (corresponding different output spectrum), obtains different output wavelength groups
The LED light source (hereinafter referred to as " combined light source ") of conjunction/spectrum.In general illumination field, because human eye is quick to the deviation of colour temperature and color
Sense, the light of different-colour have an impact the mood and eyesight of people.There is the LED lamp of variable color-temperature, tone in the market, for using
Person selects suitable lighting environment according to factors such as oneself hobby, usage scenarios.LED light source in LED display device also will
The light of output different-colour, different spectrum is sought, to ensure display effect, user's comfortable safety of eye etc..It is led in plant illumination
Domain since the light output ratio of different feux rouges, blue light, far-red light and other color of light is different to the effect of plant, needs
There is the plant growth lamp of different output wavelength combination/spectrum, to meet the illumination needs in plant growth each stage.To sum up, exist
Under many occasions, people require output colour temperature, tone, wavelength combination or spectrum of the LED combination light source under each setting value
It does not change over and changes.Therefore, it maintains the spectrum of lamps and lanterns output light constant or the spectrum of change lamps and lanterns output light arrives
Scheduled spectrum is of great significance to the application such as eyeshield.
The type and proportioning of adjustment LED chip and fluorescent powder are used about the method for adjusting spectrum in the prior art, to carry
For different types of spectrum；But above-mentioned adjusting method is difficult to accurate adjusting.
In view of drawbacks described above, creator of the present invention obtains this creation finally by prolonged research and practice.
Invention content
The purpose of the present invention is to provide a kind of lighting driving device for protecting eyesight, to overcome above-mentioned technological deficiency.
To achieve the above object, the present invention provides a kind of lighting driving device for protecting eyesight, including：First LED light group,
To provide primary illumination；Second LED light group and third LED light group, the two auxiliary provides illumination, in the first LED groups
When brightness cannot reach preset requirement, the illumination of sufficient intensity is provided in order；Wherein, first LED light group connects respectively
The first luminous flux sensor is connected to, to measure the luminous flux of the first LED light group in real time, and is fed back in control unit；It is described
First current regulating circuit, under the control of the control unit, to control the luminous flux of the first LED light group, make it preset
In the range of；Second LED light group is connected separately with the second luminous flux sensor, to measure the light of the second LED light group in real time
Flux, and feed back in control unit, to compensate the luminous flux of first LED light group；The third LED light group connects respectively
Third luminous flux sensor is connected to, to measure the luminous flux of third LED light group in real time, and is fed back in control unit, to
Compensate the luminous flux of first and second LED light group；
Wherein, second LED light group and third LED light group sequentially compensate the luminous flux of the first LED lamplight group, described
First threshold A, second threshold B, the third threshold value C of setting luminous flux in control unit, and meet A<B<C, three threshold values point
The light flux values that each LED light group that Wei not set in different use environments reaches, the collective effect for passing through three LED light groups are real
Existing luminous flux is constant；
When setting the luminous flux of demand as A, the first luminous flux sensor measures the luminous flux phi of the first LED light group,
Described control unit obtains luminous flux phi, and is compared with first threshold A, if Φ<A, then the luminous flux of the first LED light group is not
It disclosure satisfy that demand, described control unit controls the first current regulating circuit, increases electric current, and the light for promoting the first LED light group leads to
Amount Φ is until reach preset first threshold A, and device meets requirement when luminous flux is threshold value A at this time；If Φ>A then controls list
Member controls the first current regulating circuit under the premise of the second LED light group and third LED light group is cut off, and reduces electric current, makes first
The luminous flux phi of LED light group is until reach preset first threshold A；
When setting the luminous flux of light demand as B, light flux values Stepped control that control unit reaches each LED light group,
The first luminous flux sensor measures the luminous flux phi of the first LED light group, and described control unit obtains luminous flux phi, if second
Threshold value B is compared, if A<Φ<B, the unit controlled first control the first current regulating circuit, increase electric current, promote first
The luminous flux phi of LED light group is until reach preset first threshold A；Then, second current regulating circuit, increase electricity are controlled
Stream, promotes the luminous flux of the second LED light group, and the second LED light group measures the first LED after being superimposed with the luminous flux of the first LED light group
Luminous flux phi near lamp group is until reach preset second threshold B；If Φ>B, then control unit is in the 3rd LED groups of cut-out
Under the premise of, the second current regulating circuit is adjusted, reduces electric current, makes the luminous flux phi of the first LED light group until reaching preset the
Two threshold value B；
When setting the luminous flux of demand as C, light flux values Stepped control that control unit reaches each LED light group, institute
The luminous flux phi that the first luminous flux sensor measures the first LED light group is stated, described control unit obtains luminous flux phi, if third threshold
Value C is compared, if B<Φ<C, the unit controlled first control the first current regulating circuit, increase electric current, promote the first LED
The luminous flux phi of lamp group is until reach preset first threshold A；Then, second current regulating circuit is controlled, increases electric current,
The luminous flux of the second LED light group is promoted, the second LED light group measures the first LED light group after being superimposed with the luminous flux of the first LED light group
Neighbouring luminous flux phi is until reach preset second threshold B；The current value of third current regulating circuit is adjusted, makes its increase,
The luminous flux of third LED light group is promoted, third LED light group, the second LED light group are surveyed after being superimposed with the luminous flux of the first LED light group
Luminous flux phi near fixed first LED light group is until reach preset third threshold value C.If Φ>C, then control unit adjustment third
Current regulating circuit reduces electric current, makes the luminous flux phi of the first LED light group until reaching preset third threshold value C.
Further, described control unit sets difference threshold as M, the luminous flux phi of the first LED light group, the second LED light
The luminous flux phi of group2, the luminous flux phi of the second LED light group3, described control unit is according to following calculating the first LED light groups and second
The initial difference of LED light group：
In formula, M21Represent the initial difference of the first LED light group and the second LED light group, Φ represents the first luminous flux sensor
The real-time detected value of the first LED light group measured, Φ2Represent the real-time of the second LED light group that the second luminous flux sensor measures
Detected value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, I
Represent integral operation；
Wherein I represents the arbitrary integral operation based on quadratic function, and above-mentioned formula is to obtain the ratio information of integration, following
Two formula are identical, are such as based on function y=ax2, it is a in (a, b) in x values<B is any number；
Control unit is according to the first LED light group of following calculating and the initial difference of third LED light group：
In formula, M31Represent the initial difference of the first LED light group and third LED light group, Φ represents the first luminous flux sensor
The real-time detected value of the first LED light group measured, Φ2Represent the real-time of the second LED light group that the second luminous flux sensor measures
Detected value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, I
Represent integral operation；
Control unit is according to the second LED light group of following calculating and the initial difference of third LED light group：
In formula, M23Represent the initial difference of the second LED light group and third LED light group, Φ represents the first luminous flux sensor
The real-time detected value of the first LED light group measured, Φ2Represent the real-time of the second LED light group that the second luminous flux sensor measures
Detected value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, I
Represent integral operation.
Further, M of the described control unit as obtained by calculating above-mentioned formula21、M31、M23, respectively with difference threshold M
It is compared, if M21、M31、M23M is all higher than, then at this point, the luminous flux of each LED light group has enough differences, can be realized
The primary illumination effect of first LED light group, the booster action of second, third LED light group；
If above-mentioned formula calculates the M of gained21、M31、M23, it is compared respectively with difference threshold M, there are M21、M31、M23Appoint
One difference is less than M, then control unit is A, B according to the luminous flux phi of first LED light group and preset luminous flux threshold value
Or C, adjust the second LED light group, the working condition of third LED light group and to corresponding first current regulating circuit, the second electricity
Stream adjusts circuit and third current regulating circuit is adjusted.
The beneficial effects of the present invention are the present invention provides a kind of illumination driving dress for protecting eyesight compared with prior art
It puts, the present invention is on the basis of the luminous flux phi of the first LED light group, when adjusting the second current regulating circuit, first promotes the 2nd LED
The luminous flux of lamp group, until the luminous flux phi of the first LED light group of measure is met the requirements.That is, the present invention is multiple to two, three-level
It when the lamp group of conjunction is adjusted, first, adjusts to preset value A, then passes through trace regulation two level LED light, by measuring, first
The luminous flux of the luminous flux phi of LED light group namely determining field of employment determines whether to reach preset value.Compared to passing through list
The mode that one circuit, single LED light group are adjusted, regulative mode of the invention, the range bigger of the light flux values of adjusting,
More particularly to realize coarse adjustment and precisely adjust two processes, multiple constant light flux values can be set, to pass through multistage respectively
The adjustment of circuit is realized.
Described control unit sets difference threshold as M, by the mutual each LED light group difference M for calculating gained21、
M31、M23, it is compared respectively with difference threshold M, if M21、M31、M23M is all higher than, then at this point, the luminous flux of each LED light group
With enough differences, the primary illumination effect of the first LED light group, the booster action of second, third LED light group can be realized.
Description of the drawings
Fig. 1 is the block diagram of the lighting driving device of the protection eyesight of the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.
It should be noted that in the description of the present invention, the instructions such as term " on ", " under ", "left", "right", " interior ", " outer "
Direction or the term of position relationship be based on direction shown in the drawings or position relationship, this is intended merely to facilitate description, and
It is not instruction or implies that described device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
Refering to Figure 1, the block diagram of the lighting driving device of its protection eyesight for the embodiment of the present invention, including the
One LED light group to provide illumination, especially mainly provides illumination；Second LED light group and third LED light group, the two auxiliary provide
Illumination, when the brightness of the first LED groups cannot reach preset requirement, to provide the brightness of sufficient intensity in order.Its
In, first LED light group is connected separately with the first luminous flux sensor, to measure the luminous flux of the first LED light group in real time,
And it feeds back in control unit；First current regulating circuit, under the control of the control unit, to control the first LED light
The luminous flux of group, makes it in preset range.Similarly, second LED light group is connected separately with the second luminous flux sensor,
It to measure the luminous flux of the second LED light group in real time, and feeds back in control unit, to compensate first LED light group
Luminous flux.The third LED light group is connected separately with third luminous flux sensor, to measure the light of third LED light group in real time
Flux, and feed back in control unit, to compensate the luminous flux of first and second LED light group.
Specifically, second LED light group and third LED light group of the present embodiment sequentially compensate the light of the first LED lamplight group
Flux, sets first threshold A, second threshold B, the third threshold value C of luminous flux in described control unit, and meets A<B<C,
Three threshold values are respectively the light flux values that each LED light group set in different use environments reaches, final three LED light groups
Collective effect realizes the constant of luminous flux.
In specific control, when setting the luminous flux of demand as A, the first luminous flux sensor measures the first LED light
The luminous flux phi of group, described control unit obtains luminous flux phi, and is compared with first threshold A, if Φ<A, then the first LED
The luminous flux of lamp group has not been able to meet demand, and described control unit controls the first current regulating circuit, increases electric current, promotes first
The luminous flux phi of LED light group is until reach preset first threshold A, and device meets requirement when luminous flux is threshold value A at this time；If
Φ>A, then control unit is under the premise of the second LED light group and third LED light group is cut off, the first current regulating circuit of control, drop
Low current makes the luminous flux phi of the first LED light group until reaching preset first threshold A.
Specifically, when setting the luminous flux of light demand as B, light flux values that control unit reaches each LED light group
Stepped control, the first luminous flux sensor measure the luminous flux phi of the first LED light group, and described control unit obtains luminous flux
Φ, if second threshold B is compared, if A<Φ<B, the unit controlled first control the first current regulating circuit, increase electric current,
The luminous flux phi of the first LED light group is promoted until reaching preset first threshold A；Then, the second current regulation electricity is controlled
Road increases electric current, promotes the luminous flux of the second LED light group, and the second LED light group is surveyed after being superimposed with the luminous flux of the first LED light group
Luminous flux phi near fixed first LED light group is until reach preset second threshold B.If Φ>B, then control unit is in cut-out the
Under the premise of three LED groups, the second current regulating circuit is adjusted, reduces electric current, makes the luminous flux phi of the first LED light group until reaching
Preset second threshold B.
The present invention is on the basis of the luminous flux phi of the first LED light group, when adjusting the second current regulating circuit, first promotes
The luminous flux of two LED light groups, until the luminous flux phi of the first LED light group of measure is met the requirements.That is, the present invention is to two level
It when compound lamp group is adjusted, first, adjusts to preset value A, then passes through trace regulation two level LED light, by measuring, first
The luminous flux of the luminous flux phi of LED light group namely determining field of employment determines whether to reach preset value.Compared to passing through list
The mode that one circuit, single LED light group are adjusted, regulative mode of the invention, the range bigger of the light flux values of adjusting,
More particularly to realize coarse adjustment and precisely adjust two processes, multiple constant light flux values can be set, to pass through multistage respectively
The adjustment of circuit is realized.
Specifically, when setting the luminous flux of demand as C, light flux values rank that control unit reaches each LED light group
Ladder control,
The first luminous flux sensor measures the luminous flux phi of the first LED light group, and described control unit obtains luminous flux
Φ, if third threshold value C is compared, if B<Φ<C, the unit controlled first control the first current regulating circuit, increase electric current,
The luminous flux phi of the first LED light group is promoted until reaching preset first threshold A；Then, the second current regulation electricity is controlled
Road increases electric current, promotes the luminous flux of the second LED light group, and the second LED light group is surveyed after being superimposed with the luminous flux of the first LED light group
Luminous flux phi near fixed first LED light group is until reach preset second threshold B；Adjust the electric current of third current regulating circuit
Value makes its increase, promotes the luminous flux of third LED light group, the light of third LED light group, the second LED light group and the first LED light group
The luminous flux phi near the first LED light group is measured until reaching preset third threshold value C after flux superposition.If Φ>C is then controlled
Unit adjusts third current regulating circuit, reduces electric current, makes the luminous flux phi of the first LED light group until reaching preset third threshold
Value C.
Specifically, when adjusting the first current regulating circuit, the second current regulating circuit and third current regulating circuit,
In order to act on Coordinated Play between each LED light group, using the first LED light group as main illumination component, the control
Unit processed controls the difference of the luminous flux of each LED light group, is larger than preset difference range, and described control unit setting is poor
Value threshold value be M, the luminous flux phi of the first LED light group, the luminous flux phi of the second LED light group2, the luminous flux phi of the second LED light group3。
Control unit is according to the first LED light group of following calculating and the initial difference of the second LED light group：
In formula, M21Represent the initial difference of the first LED light group and the second LED light group, Φ represents the first luminous flux sensor
The real-time detected value of the first LED light group measured, Φ2Represent the real-time of the second LED light group that the second luminous flux sensor measures
Detected value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, I
Represent integral operation.
Wherein I represents the arbitrary integral operation based on quadratic function, and above-mentioned formula is to obtain the ratio information of integration, following
Two formula are identical, are such as based on function y=ax2, it is a in (a, b) in x values<B is any number.
The rudimentary algorithm of above-mentioned mean operation is：By obtaining the positional value of all sampled points within some period,
Integral operation and mean square deviation operation are carried out to each value in some period, ratio is then taken, show that is compared is averaged
Value.
Control unit is according to the first LED light group of following calculating and the initial difference of third LED light group：
In formula, M31Represent the initial difference of the first LED light group and third LED light group, Φ represents the first luminous flux sensor
The real-time detected value of the first LED light group measured, Φ2Represent the real-time of the second LED light group that the second luminous flux sensor measures
Detected value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, I
Represent integral operation.
Control unit is according to the second LED light group of following calculating and the initial difference of third LED light group：
In formula, M23Represent the initial difference of the second LED light group and third LED light group, Φ represents the first luminous flux sensor
The real-time detected value of the first LED light group measured, Φ2Represent the real-time of the second LED light group that the second luminous flux sensor measures
Detected value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, I
Represent integral operation.
Described control unit sets difference threshold as M, and the M of gained is calculated by above-mentioned formula21、M31、M23, respectively with difference
Value threshold value M is compared, if M21、M31、M23Be all higher than M, then at this point, the luminous flux of each LED light group has enough differences,
It can realize the primary illumination effect of the first LED light group, the booster action of second, third LED light group.
If above-mentioned formula calculates the M of gained21、M31、M23, it is compared respectively with difference threshold M, there are M21、M31、M23Appoint
One difference is less than M, then control unit is A, B according to the luminous flux phi of first LED light group and preset luminous flux threshold value
Or C, adjust the second LED light group, the working condition of third LED light group and to corresponding first current regulating circuit, the second electricity
Stream adjusts circuit and third current regulating circuit is adjusted, and repeats the above-mentioned process about luminous flux adjustment, this is repeated no more,
Until meet the M for calculating gained21、M31、M23, it is compared respectively with difference threshold M, M21、M31、M23It is all higher than M values.
Above-mentioned detailed description is illustrating for one of them possible embodiments of the present invention, the embodiment not to
The scope of the claims of the present invention is limited, all equivalence enforcements or change without departing from carried out by the present invention are intended to be limited solely by the technology of the present invention
In the range of scheme.
Claims (3)
1. a kind of lighting driving device for protecting eyesight, which is characterized in that including：First LED light group, to provide main photograph
It is bright；Second LED light group and third LED light group, the two auxiliary provides illumination, cannot reach in the brightness of the first LED groups
During preset requirement, the illumination of sufficient intensity is provided in order；Wherein, first LED light group is connected separately with the first luminous flux
Sensor to measure the luminous flux of the first LED light group in real time, and is fed back in control unit；The first current regulation electricity
Road, under the control of the control unit, to control the luminous flux of the first LED light group, make it in preset range；Described second
LED light group is connected separately with the second luminous flux sensor, to measure the luminous flux of the second LED light group in real time, and feeds back to control
In unit processed, to compensate the luminous flux of first LED light group；The third LED light group is connected separately with third luminous flux
Sensor to measure the luminous flux of third LED light group in real time, and is fed back in control unit, to compensate described first and second
The luminous flux of LED light group；
Wherein, second LED light group and third LED light group sequentially compensate the luminous flux of the first LED lamplight group, in the control
First threshold A, second threshold B, the third threshold value C of setting luminous flux in unit, and meet A<B<C, three threshold values are respectively
The light flux values that each LED light group set in different use environments reaches realize light by the collective effect of three LED light groups
Flux constant；
When setting the luminous flux of demand as A, the first luminous flux sensor measures the luminous flux phi of the first LED light group, described
Control unit obtains luminous flux phi, and is compared with first threshold A, if Φ<A, then the luminous flux of the first LED light group have not been able to
Meet demand, described control unit control the first current regulating circuit, increase electric current, promote the luminous flux phi of the first LED light group
Until reach preset first threshold A, requirement when device meets luminous flux for threshold value A at this time；If Φ>A, then control unit exist
Under the premise of cutting off the second LED light group and third LED light group, the first current regulating circuit is controlled, electric current is reduced, makes the first LED
The luminous flux phi of lamp group is until reach preset first threshold A；
When setting the luminous flux of light demand as B, light flux values Stepped control that control unit reaches each LED light group is described
First luminous flux sensor measures the luminous flux phi of the first LED light group, and described control unit obtains luminous flux phi, if second threshold
B is compared, if A<Φ<B, the unit controlled first control the first current regulating circuit, increase electric current, promote the first LED light
The luminous flux phi of group is until reach preset first threshold A；Then, second current regulating circuit is controlled, increases electric current, carries
The luminous flux of the second LED light group is risen, the second LED light group measures the first LED light group after being superimposed with the luminous flux of the first LED light group attached
Near luminous flux phi is until reach preset second threshold B；If Φ>B, then control unit under the premise of the 3rd LED groups are cut off,
The second current regulating circuit is adjusted, reduces electric current, makes the luminous flux phi of the first LED light group until reaching preset second threshold B；
When setting the luminous flux of demand as C, light flux values Stepped control that control unit reaches each LED light group, described
One luminous flux sensor measures the luminous flux phi of the first LED light group, and described control unit obtains luminous flux phi, if third threshold value C
It is compared, if B<Φ<C, the unit controlled first control the first current regulating circuit, increase electric current, promote the first LED light group
Luminous flux phi until reach preset first threshold A；Then, second current regulating circuit is controlled, increases electric current, is promoted
The luminous flux of second LED light group, the second LED light group are measured after being superimposed with the luminous flux of the first LED light group near the first LED light group
Luminous flux phi until reach preset second threshold B；The current value of third current regulating circuit is adjusted, makes its increase, is promoted
The luminous flux of third LED light group, third LED light group, the second LED light group measure after being superimposed with the luminous flux of the first LED light group
Luminous flux phi near one LED light group is until reach preset third threshold value C.If Φ>C, then control unit adjustment third electric current
Circuit is adjusted, reduces electric current, makes the luminous flux phi of the first LED light group until reaching preset third threshold value C.
2. the lighting driving device of protection eyesight according to claim 1, which is characterized in that described control unit setting is poor
Value threshold value be M, the luminous flux phi of the first LED light group, the luminous flux phi of the second LED light group2, the luminous flux phi of the second LED light group3,
Described control unit is according to the first LED light group of following calculating and the initial difference of the second LED light group：
In formula, M21Represent the initial difference of the first LED light group and the second LED light group, Φ represents that the first luminous flux sensor measures
The first LED light group real-time detected value, Φ2Represent the real-time detection for the second LED light group that the second luminous flux sensor measures
Value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, and I is represented
Integral operation；
Wherein I represents the arbitrary integral operation based on quadratic function, and above-mentioned formula is to obtain the ratio information of integration, and following two is public
Formula is identical, is such as based on function y=ax2, it is a in (a, b) in x values<B is any number；
Control unit is according to the first LED light group of following calculating and the initial difference of third LED light group：
In formula, M31Represent the initial difference of the first LED light group and third LED light group, Φ represents that the first luminous flux sensor measures
The first LED light group real-time detected value, Φ2Represent the real-time detection for the second LED light group that the second luminous flux sensor measures
Value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, and I is represented
Integral operation；
Control unit is according to the second LED light group of following calculating and the initial difference of third LED light group：
In formula, M23Represent the initial difference of the second LED light group and third LED light group, Φ represents that the first luminous flux sensor measures
The first LED light group real-time detected value, Φ2Represent the real-time detection for the second LED light group that the second luminous flux sensor measures
Value, Φ3Represent the real-time detected value for the third LED light group that third luminous flux sensor measures, T represents mean square deviation operation, and I is represented
Integral operation.
3. the lighting driving device of protection eyesight according to claim 2, which is characterized in that described control unit passes through upper
State the M that formula calculates gained21、M31、M23, it is compared respectively with difference threshold M, if M21、M31、M23Be all higher than M, then at this point,
The luminous flux of each LED light group has enough differences, can realize the primary illumination effect of the first LED light group, second, third
The booster action of LED light group；
If above-mentioned formula calculates the M of gained21、M31、M23, it is compared respectively with difference threshold M, there are M21、M31、M23Any difference
Value is less than M, then control unit is A, B or C according to the luminous flux phi of first LED light group and preset luminous flux threshold value,
Adjust the second LED light group, the working condition of third LED light group and to corresponding first current regulating circuit, the second electric current tune
Economize on electricity road and third current regulating circuit are adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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