CN111065183A - Method and system for controlling illumination intensity of LED table lamp - Google Patents
Method and system for controlling illumination intensity of LED table lampDownload PDFInfo
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Abstract
Description
Technical Field
The invention relates to the field of movable lighting, in particular to a method and a system for controlling the illumination intensity of an LED table lamp.
Background
With the progress of society, the LED illuminating table lamp is deeply popular with reading enthusiasts and students due to the characteristics of energy conservation, mobility, adjustable swing arm and the like, and becomes a preferred product of a desktop reading auxiliary light source. At present, reading materials on the market are more and more diversified, and even if the reading materials are paper reading materials, the materials and the colors of the reading materials are different. The paper made of different materials and colors absorbs and reflects light differently, so that the irradiation intensity of each light system required when the reflected light on the reading material is close to the spectrum saturation of sunlight is different, but the color system and the light intensity of the LED table lamp in the market are fixed and unchanged during illumination, when the fixed light of the LED lamp is not suitable for certain types of paper reading materials, the eyes are over-tired due to glare caused by over reflection or diffuse reflection of the paper, and the eyesight is seriously affected, particularly the eyesight of teenagers and children.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for controlling the illumination intensity of an LED table lamp, which can intelligently adjust the color system illumination intensity matched with the paper reading material according to the material and color of the paper reading material, so that the reflected light on the paper reading material is close to the sunlight spectrum saturation, the visual fatigue caused by excessive reflection or diffuse reflection during reading is relieved, and eyes are protected.
In order to achieve the purpose, the invention adopts the following technical scheme:
emitting a standard white light beam to a paper surface, wherein the standard white light beam is perpendicular to the paper surface;
acquiring reflected light of the standard white light beam on the surface of the paper;
according to the CIE coordinate (X) of the reflected lightn，Yn) Acquiring the reflected light in the standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)c，Yc) The above-mentioned (X)c，Yc) Corresponding spectrum FCAnd the intensity of said reflected light
Light intensity relative to the standard white light beam
Amount of change of
According to (X)c，Yc)、FC、
And controlling the driving current of a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED in the LED desk lamp so that the spectrum of the reflected light of the paper is close to the saturation of the sunlight spectrum after the light beams emitted by the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED irradiate on the paper.
Preferably, the standard white light beam comprises a plurality of beams, and each beam corresponds to one reflected light;
the CIE coordinate (X) according to the reflected lightn，Yn) Acquiring the reflected light in the standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)c，Yc) And the intensity of the reflected light
Relative to the standard white beam intensity
Amount of change of
The method comprises the following steps:
obtaining each of said reflected light at standard CIE coordinates (X)0,Y0) Offset amount (X) in (1)n-0,Yn-0) (ii) a Wherein, X1-0＝X1-X0，X2-0＝X2-X0，…，Xn-0＝Xn-X0；Y1-0＝Y1-Y0，Y2-0＝Y2-Y0，…，Yn-0＝Yn-Y0；
Calculating all of (X)N-0,YN-0) Mean value of (i.e. X)c＝AVERAGE(X1-0:Xn-0),Yc＝AVERAGE(Y1-0:Yn-0) To obtain said (X)c，Yc)；
Said (X)c，Yc) Corresponding to the standard CIE coordinate (X)0,Y0) Is the intensity of
Preferably, the offset (X) is obtainedc，Yc) Corresponding spectrum FCThe method comprises the following steps:
obtaining each of (X)n-0,Yn-0) Corresponding spectrum Fn-0(ii) a Wherein, F1-0＝F1-F0，F2-0＝F2-F0，…，Fn-0＝Fn-F0；
Calculating all of said Fn-0Mean value of (i), i.e. FC＝AVERAGE(F1-0,Fn-0)；
Said FCThe light of the corresponding wavelength is used to compensate the spectrum absorbed by the paper.
Preferably, said is according to (X)c，Yc)、FC、
The method for controlling the driving current of the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED in the LED desk lamp comprises the following steps:
according to the light intensity difference
Information and said (X)c，Yc) The information output corresponds to prestored first current intensity information, the first current intensity information is used for indicating a current value for driving the warm light LED to emit light and a current value for driving the cold light LED to emit light, and the current values enable the light emitted by the warm light LED and the cold light LED to be mixed to compensate the light intensity difference
Preferably, the method further comprises the following steps: according to said spectrum FCOutputting corresponding second current intensity information; the second current intensity signal is used for indicating a current value for driving the red light LED to emit light, a current value for driving the blue light LED to emit light and a current value for driving the green light LED to emit light, and the current values enable the spectrum of light generated by mixing the light emitted by the red light LED, the light emitted by the blue light LED and the light emitted by the green light LED to be FC。
The invention also discloses a system for controlling the illumination intensity of the LED table lamp, which comprises the following components:
the LEDs comprise a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED;
the emission probe is used for emitting a standard white light beam to the surface of the paper, and the standard white light beam is vertical to the surface of the paper;
a receiving probe for receiving the reflected light of the standard white light beam on the surface of the paper;
a signal processor connected with the transmitting probe and the receiving probe and used for processing the CIE coordinate (X) of the reflected lightn，Yn) Acquiring the reflected light in the standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)c，Yc) And the (X)c，Yc) Corresponding spectrum FCIntensity of the reflected light
Light intensity relative to the standard white light beam
Amount of change of
A dimming driver connected with the signal processing module and the LED for adjusting the dimming according to the (X)c，Yc)、FC、
And controlling the driving current of a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED in the LED desk lamp so that the spectrum of the reflected light of the paper is close to the saturation of the sunlight spectrum after the light beams emitted by the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED irradiate on the paper.
Preferably, the signal conversion module is configured to obtain a standard CIE coordinate (X) of each of the reflected lights0,Y0) Offset amount (X) in (1)n-0,Yn-0) Each of (X) ton-0,Yn-0) Corresponding spectrum Fn-0(ii) a Wherein, X1-0＝X1-X0，X2-0＝X2-X0，…，Xn-0＝Xn-X0；Y1-0＝Y1-Y0，Y2-0＝Y2-Y0，…，Yn-0＝Yn-Y0；F1-0＝F1-F0，F2-0＝F2-F0，…，Fn-0＝Fn-F0；
Calculating all of (X)N-0,YN-0) Mean value of (i.e. X)c＝AVERAGE(X1-0:Xn-0),Yc＝AVERAGE(Y1-0:Yn-0) To obtain said (X)c，Yc) (ii) a Said (X)c，YcCorresponding to the standard CIE coordinate (X)0,Y0) Is the intensity of
Calculating all of said Fn-0Mean value of (i), i.e. FC＝AVERAGE(F1-0,Fn-0)；
Said FCThe light of the corresponding wavelength is used to compensate the spectrum absorbed by the paper.
Preferably, the signal processor further includes: and the signal filtering module is connected between the receiving probe and the signal conversion module and is used for filtering noise in the reflected light.
Preferably, the dimming driver includes:
a signal receiving module connected with the signal conversion module and used for receiving the light intensity difference
Information and said (X)c，Yc) Outputting corresponding pre-stored first current intensity information according to the information, and outputting the corresponding pre-stored first current intensity information according to the spectrum FCOutputting corresponding second current intensity information; the first current intensity information is used for indicating the current value for driving the warm light LED to emit light and the current value for driving the cold light LED to emit lightA current value which enables the light emitted by the warm light LED and the cold light LED to be mixed so as to compensate the light intensity difference
The second current intensity signal is used for indicating a current value for driving the red light LED to emit light, a current value for driving the blue light LED to emit light and a current value for driving the green light LED to emit light, and the current values enable the spectrum of light generated by mixing the light emitted by the red light LED, the light emitted by the blue light LED and the light emitted by the green light LED to be FC。
And the dimming driving module is connected with the signal receiving module and used for receiving the first current intensity information to control the current intensity output to the warm light LED and the cold light LED and receiving the second current intensity information to control the current intensity output to the red light LED, the blue light LED and the green light LED.
Preferably, the dimming driver further comprises:
and the power amplification module is connected between the dimming driving module and the LED and used for amplifying the current output by the dimming driving module.
Compared with the prior art, the invention has the beneficial effects that:
the CIE coordinate (X) of the reflected light is obtained by comparing the reflected light with the original standard white light beamn，Yn) Average offset (X) ofc，Yc) By CIE coordinates (X)c，Yc) Obtaining the light intensity variation of the reflected light
At least a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED are arranged on the LED desk lamp according to (X)c，Yc)、(Xc，Yc) Corresponding spectrum FCAmount of change of
The luminous intensities of the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED are controlled, so that the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED emit lightThe light energy compensates the color light absorbed by the paper and compensates the enhancement degree or the attenuation degree of the reflected light, so that the spectrum corresponding to the reflected light on the paper is close to the spectrum saturation degree of sunlight, the eye strain caused by glare caused by excessive reflection or diffuse reflection is prevented, and the eyes are protected.
Drawings
The invention will now be further described with reference to the accompanying drawings and specific embodiments thereof:
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a system block diagram of the present invention;
FIG. 3 is a schematic structural diagram of a PCBA module according to the present invention;
FIG. 4 is a schematic diagram of the structure of an inductive probe of the present invention;
fig. 5 is a schematic structural diagram of the LED table lamp of the invention.
In the figure:
1. a signal processor for processing the received signals and the received signals,
11.signal generating module 12, signal filtering module 13, signal conversion module 14, signal processor power supply module
2. A dimming driver for driving the light source to a dimming state,
21. apower amplification module 22, a dimming driving module 23, a signal receiving module 24, a dimming driver power supply module,
3. a PCB base, a PCB base and a PCB,
31. the detection probe comprises a detection probe body, adetection probe head 32, a warm light LED, adetection probe 33, a cold light LED, adetection probe 34, a red light LED, adetection probe 35, a green light LED, adetection probe 36, a blue light LED, adetection probe 311, anemission probe 312, a receivingprobe 313 and a hemispherical lens;
4. paper, 5, bracing piece, 6, supporting seat, 7, lamp shade.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example one
As shown in fig. 1, the present embodiment discloses a method for controlling the illumination intensity of an LED desk lamp, which includes the following steps:
s1: emitting a standard white light beam to the surface of thepaper 4, wherein the standard white light beam is vertical to the surface of thepaper 4;
s2: acquiring reflected light of the standard white light beam on the surface of thepaper 4;
s3: according to CIE coordinates (X) of reflected lightn，Yn) Obtaining reflected light in the standard CIE coordinates (X)0,Y0) Offset amount (X) in (1)c，Yc) Offset amount (X)c，Yc) Corresponding spectrum FCAnd the intensity of the reflected light
Light intensity relative to a standard white light beam
Amount of change of
S4: according to (X)c，Yc)、FC、
The driving currents of the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 in the LED table lamp are controlled, so that after light beams emitted by the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 are irradiated on thepaper 4, the spectrum of the reflected light of thepaper 4 is close to the sunlight spectrum saturation.
Compared with the prior art, the CIE coordinate (X) of the reflected light is obtained by comparing the reflected light with the original standard white light beamn，Yn) Average offset (X) ofc，Yc) By CIE coordinates (X)c，Yc) Obtaining the light intensity variation of the reflected light
The LED desk lamp is at least provided with a warm light LED32, a cold light LED33, a red light LED34, a blue light LED36 and a green light LED35,according to (X)c，Yc)、(Xc，Yc) Corresponding spectrum FCAmount of change of
The luminous intensities of the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 are controlled, so that the light emitted by the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 can compensate the color light absorbed by thepaper 4 and the enhancement degree or attenuation degree of the reflected light, the spectrum corresponding to the reflected light on thepaper 4 is close to the spectrum saturation degree of sunlight, the excessive fatigue of eyes caused by glare due to excessive reflection or diffuse reflection is prevented, and the eyes are protected.
In this embodiment, the standard white light beam includes a plurality of beams, each beam of the standard white light beam corresponds to one reflected light; step S2 includes:
obtaining each reflected light in a standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)n-0,Yn-0) (ii) a Wherein, X1-0＝X1-X0，Y1-0＝Y1-Y0；X2-0＝X2-X0，Y2-0＝Y2-Y0；…；Xn-0＝Xn-X0，Yn-0＝Yn-Y0；
Calculate all (X)N-0,YN-0) Mean value of (i.e. X)c＝AVERAGE(X1-0:Xn-0),Yc＝AVERAGE(Y1-0:Yn-0) To obtain (X)c，Yc)；
(Xc，Yc) Corresponding to the standard CIE coordinate (X)0,Y0) Of intensity of
And:
obtain each (X)n-0,Yn-0) Corresponding spectrum Fn-0(ii) a Wherein, F1-0＝F1-F0，F2-0＝F2-F0，…，Fn-0＝Fn-F0；
Calculate all Fn-0Mean value of (i), i.e. FC＝AVERAGE(F1-0,Fn-0)；
FCThe light of the corresponding wavelength is used to compensate the spectrum absorbed by thepaper 4.
Or:
acquiring coordinates of (X)n，Yn) Intensity of reflected light of (2)
And the coordinate is (X)0,Y0) The illumination intensity of the standard light beam
Difference of (2)
(i.e. the
) Calculating
I.e. the mean value of the differences between all reflected light and the standard beam illumination intensity is obtained.
If the color of the paper 4 is light yellow, when the standard white light impinges on the light yellow paper 4, the light yellow paper 4 absorbs part of yellow light in the standard white light, and the CIE coordinate of the reflected light after the absorbed part of yellow light is (X)n,Yn) CIE coordinate (X) of standard white light0,Y0) Is (X)n-X0,Yn-Y0) (ii) a Offset (X)n-X0,Yn-Y0) Corresponding to the standard CIE coordinate (X)0,Y0) The chromaticity of the light is the absorbed color light, and meanwhile, the illumination intensity of the reflected light is obtained
Intensity of illumination with standard light beam
By a difference of
(i.e. the
) Offset (X)n-X0,Yn-Y0) Corresponding spectrum is FN. According to the offset (X)n-X0,Yn-Y0) Poor strength
Controlling the magnitude of the driving current of the warm light LED32 and the cold light LED33 according to the spectrum FNControlling the magnitude of the driving current of the red LED34, the blue LED36, and the green LED 35; the light emitting intensity of the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 is controlled by controlling the current, so that the emitted red light, blue light and green light are mixed to generate colored light absorbed by the paper 4, and the emitted warm light and cold light are mixed to generate offset
The light of (2) further, make warm light, cold light, ruddiness, blue light, green glow on paper 4 go into to mix and the light that generates has supplemented the absorbed chromatic light for the spectrum of the reflection light on paper 4 is close to sunlight spectral saturation, and then realizes that eyes are under the light environment that is close to sunlight all the time, alleviates eye fatigue, and then protects eyes.
In the present embodiment, in order to improve accuracy and reliability, (X) is obtained by obtaining a plurality of reflected lightsc，Yc)、FC、
Regarding the difference between the intensity of the reflected light and the intensity of the standard white light, the coordinate is assumed to be (X)n，Yn) Illumination intensity of reflected light of (2)Degree of
The standard white light beam has an illumination intensity of
Illumination intensity compared to standard light beam
The intensity of reflected light is increased by
Is a physical vector, such as when the surface of thepaper 4 is covered with a highly reflective material such as a plastic film,
will be a positive value when there is no film on the surface of thepaper 4
Either a positive or a negative value. Therefore, when
When the value is negative, it is indicated that the intensity of the reflected light from thesheet 4 is too small, and the intensity of the light emitted from the warm light LED32 and the cold light LED33 is increased to increase the intensity of the light emitted from the warm light LED32 and the cold light LED33, so that the reflected light from thesheet 4 is increased and the increased reflected light cancels out the increased reflected light
Ensuring that the spectrum of the reflected light is close to the spectrum saturation of the sunlight; when in use
When the value is positive, the intensity of the reflected light from thesheet 4 is too large, and the light intensities of the warm light LED32 and the cool light LED33 are decreased to reduce the illuminance on thesheet 4, i.e., the reflected light from thesheet 4 is reduced, and the reduced reflected light is added to the reduced reflected light
The spectrum of the reflected light is close to the sunlight spectral saturation.
In the present embodiment, step S4 includes:
according to the light intensity difference
Information and said (X)c，Yc) The information output corresponds to prestored first current intensity information, the first current intensity information is used for indicating a current value for driving the warm light LED to emit light and a current value for driving the cold light LED to emit light, and the current values enable the light emitted by the warm light LED and the cold light LED to be mixed to compensate the light intensity difference
According to said spectrum FCOutputting corresponding second current intensity information; the second current intensity signal is used for indicating a current value for driving the red light LED to emit light, a current value for driving the blue light LED to emit light and a current value for driving the green light LED to emit light, and the current values enable the spectrum of light generated by mixing the light emitted by the red light LED, the light emitted by the blue light LED and the light emitted by the green light LED to be FC。
Specifically, a control system is arranged in the LED table lamp, a memory bank is arranged in the control system, and a control signal instruction set is stored in the memory bank; the control signal command includes an offset coordinate value (X)N,YN) Information, spectrum FC1Information, light intensity difference
Information, coordinate value (X)N,YN) Information and light intensity difference
First current intensity information and spectrum F corresponding to informationC1Second current intensity information corresponding to the information;
comparison (X)c,Yc) And (X)N,YN) When (X)c,Yc) And (X)N,YN) Is less than a first preset value, (X) is obtainedN,YN) Corresponding first current intensity information to control the current intensity output to the warm light LED32, thecool light LED 33;
comparison FCAnd FC1When F isCAnd FC1When the difference value of (A) is less than a second preset value, F is obtainedC1Corresponding second current intensity information to control the current intensity output to the red LED34, the blue LED36, and thegreen LED 35.
If the control command carries the offset (X) in step S2c，Yc) Information, spectrum FCInformation, light intensity difference
Information, such as a control command, carries the offset (X) in step S2c，Yc) Information, spectrum FCInformation, light intensity difference
The information is transmitted to the mobile station via the wireless,
for example, when the offset coordinate value (X) of a control signal command is retrievedN3,YN3) Information and (X)3，Y3) Difference of (2)<At 0.0001, default offset coordinate value (X) of systemN3,YN3) Corresponding control signal command and (X)3，Y3) Are completely matched; extracting shift coordinate value (X)N3,YN3) Corresponding control signals are commanded to control the drive currents of warm light LED32 and coollight LED 33.
Or:
when the offset coordinate value (X) is searchedN,YN) The control signal command packet and the coordinate value (X) in the memory bankN1,YN1) Differences between control instruction packets<At 0.0001, default offset coordinate value (X) of systemN,YN) The control signal command packet and the coordinate value (X) in the memory bankN1,YN1) The control command packet of (a) is perfectly matched;
when spectrum F is retrievedCInformation control signal command packet andspectra of the library FC1System default F when binary encoding between control instruction packets is within 4 bytesCSpectrum F of information control signal command packet and memory bankC1The control command packets being perfectly matched
When the intensity of the illumination is retrieved
Control signal command packet of information and illuminance in memory bank
When the difference value between the control command packets is less than 0.001, the system defaults the illumination intensity
Control signal command packet of information and illuminance in memory bank
The control command packet is perfectly matched;
therefore, the control signal command includes the coordinate value (X)N1,YN1) Control instruction packet and spectrum FC1Control command packet and illuminance
A control command packet for controlling CIE coordinate (X)N,YN) And illuminance
Corresponding current intensity signals and output spectra F of the warm light LED32 and the cold light LED33CCorresponding current intensity signals of the red LED34, the blue LED36 and thegreen LED 35;
example two
As shown in fig. 2, the present embodiment discloses a system for controlling the illumination intensity of an LED desk lamp, which includes:
the LEDs comprise a warm light LED32, a cold light LED33, a red light LED34, a blue light LED36 and agreen light LED 35;
theemission probe 311 is used for emitting a standard white light beam to the surface of thepaper 4, and the standard white light beam is vertical to the surface of thepaper 4;
a receivingprobe 312 for receiving the reflected light of the standard white light beam on the surface of thesheet 4;
a signal processor 1 connected to the transmittingprobe 311 and the receivingprobe 312 for processing the CIE coordinates (X) of the reflected lightn，Yn) Obtaining reflected light in the standard CIE coordinates (X)0,Y0) Offset amount (X) in (1)c，Yc) And (X)c，Yc) Corresponding spectrum FCIntensity of reflected light
Light intensity relative to a standard white light beam
Amount of change of
A dimmingdriver 2 connected with the signal processing module, the LED, for adjusting the output voltage according to (X)c，Yc)、FC、
The driving currents of the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 in the LED table lamp are controlled, so that after light beams emitted by the warm light LED32, the cold light LED33, the red light LED34, the blue light LED36 and the green light LED35 are irradiated on thepaper 4, the spectrum of the reflected light of thepaper 4 is close to the sunlight spectrum saturation.
In this embodiment, the signal processor 1 includes a signal conversion module 13, and the signal conversion module 13 is configured to:
obtaining each reflected light in a standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)n-0,Yn-0) Each of (X)n-0,Yn-0) Corresponding spectrum Fn-0(ii) a Wherein, X1-0＝X1-X0，X2-0＝X2-X0，…，Xn-0＝Xn-X0；Y1-0＝Y1-Y0，Y2-0＝Y2-Y0，…，Yn-0＝Yn-Y0；F1-0＝F1-F0，F2-0＝F2-F0，…，Fn-0＝Fn-F0；
Calculate all (X)N-0,YN-0) Mean value of (i.e. X)c＝AVERAGE(X1-0:Xn-0),Yc＝AVERAGE(Y1-0:Yn-0) To obtain (X)c，Yc)；(Xc，YcCorresponding to the standard CIE coordinate (X)0,Y0) Of intensity of
Calculate all Fn-0Mean value of (i), i.e. FC＝AVERAGE(F1-0,Fn-0)；
FCThe light of the corresponding wavelength is used to compensate the spectrum absorbed by thepaper 4.
In the present embodiment, the signal processor 1 further includes:
and asignal filtering module 12 connected between the receivingprobe 312 and the signal conversion module 13 for filtering noise in the reflected light.
In the present embodiment, the dimming driver 2:
a signal receiving module 23 connected to the signal conversion module 13 for receiving the light intensity difference
Information and said (X)c，Yc) Outputting corresponding pre-stored first current intensity information according to the information, and outputting the corresponding pre-stored first current intensity information according to the spectrum FCOutputting corresponding second current intensity information; the first current intensity information is used for indicating a current value for driving the warm light LED to emit light and a current value for driving the cold light LED to emit light, and the current values enable the light emitted by the warm light LED and the cold light LED to be mixed to compensate the light intensity difference
The second current intensity signal is used for indicating a current value for driving the red light LED to emit light, a current value for driving the blue light LED to emit light and a current value for driving the green light LED to emit light, and the current values enable the spectrum of light generated by mixing the light emitted by the red light LED, the light emitted by the blue light LED and the light emitted by the green light LED to be FC。
And thedimming driving module 22 is connected with the signal receiving module 23 and is used for receiving the first current intensity information to control the current intensity output to the warm light LED32 and the cool light LED33, and receiving the second current intensity information to control the current intensity output to the red light LED34, the blue light LED36 and thegreen light LED 35.
Specifically, the control instruction includes (X)c，Yc) Information, FCInformation, a,
Information;
a control signal instruction set is stored in the signal receiving module 23;
the control signal command includes an offset coordinate value (X)N,YN) Information, spectrum FC1Information, light intensity difference
Information, (X)N,YN)、
Corresponding first current intensity information, FC1Corresponding second current intensity information;
the signal receiving module 23 is connected with the signal conversion module 13 for comparison (X)c,Yc) And (X)N,YN) When (X)c,Yc) And (X)N,YN) Is less than the first preset value, (X) isN,YN) Corresponding control signal instructions are sent to thedimming driving module 22, so that thedimming driving module 22 controls the current intensity output to the warm light LED32 and thecool light LED 33; and comparison FCAnd FC1When F isCAnd FC1When the difference value of F is less than the second preset value, F is setC1The corresponding control signal command is sent to thedimming driving module 22, so that thedimming driving module 22 controls the current intensity output to the red LED34, the blue LED36, and thegreen LED 35.
In this embodiment, the dimmingdriver 2 further includes:
and thepower amplification module 21 is connected between thedimming driving module 22 and the LED, and is configured to amplify the current output by thedimming driving module 22.
In this embodiment, the method further includes: the system comprises a signal generation module 11, a signal processor power supply module 14 and a dimming driver power supply module 24; the signal processor power supply module 14 is arranged in the signal processor 1 and is connected with the commercial power in parallel through a C11 wire harness, so that the signal processor 1 is kept in a working state; the dimmingdriver 2 power supply module is arranged in the dimmingdriver 2 and is connected with the mains supply in parallel through a C10 wire harness, so that the dimmingdriver 2 is kept in an operating state.
The signal generating module 11 and the transmittingprobe 311 are used for controlling the times of transmitting the standard white light beam by the transmittingprobe 311. The standard white light beams are emitted for multiple times to obtain multiple reflected lights, and the mean value of CIE coordinate offset of each reflected light is solved, so that the accuracy and the effectiveness of data are improved.
EXAMPLE III
The embodiment discloses an LED table lamp, which comprises the system of the second embodiment,
in this embodiment, the detectingprobe 31 is included, the detectingprobe 31 includes a transmittingprobe 311, a receivingprobe 312, a fixing base, and ahemispherical lens 313, the transmittingprobe 311, the receivingprobe 312, and thehemispherical lens 313 are mounted on the fixing base, and the transmittingprobe 311 and the receivingprobe 312 are located in thehemispherical lens 313
In this embodiment, the device further comprises a PCB base 3, and the LED and thedetection probe 31 are mounted on the PCB base 3; the red light LED34, the blue light LED36 and the green light LED35 are arranged in the middle of the PCB base 3, the warm light LED32 and the cold light LED33 are arranged at two ends of the PCB base 3, and the warm light LED32 and the cold light LED33 are arranged at intervals; theinspection probe 31 is mounted on the end of the PCB base 3.
The LED table lamp in the embodiment comprises a supporting seat 6, a bendable supportingrod 5 and a lampshade 7; one end of thesupport rod 5 is fixed on the support seat 6, and the other end is connected with the lampshade 7; the PCB base 3 is mounted on the inner top of the lamp housing 7.
In the embodiment, the red light LED34, the blue light LED36 and the green light LED35 are arranged in the middle of the PCB base 3, so that the uniformity of the red light, the blue light and the green light hitting each position of thepaper 4 is the same, and the red light, the blue light and the green light at each position of thepaper 4 are mixed according to the same proportion to generate the light absorbed by thepaper 4, so as to realize the light compensation of thepaper 4; warm light LED32, cold light LED33 interval set up for the intensity of the warm light of hitting on each position ofpaper 4 and the cold light mixed light is the same, has guaranteed that the light intensity on each position ofpaper 4 is the same promptly, guarantees the comfort of vision, reduces eye fatigue.
The present invention is not limited to the above-described embodiments, and various changes and modifications of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (10)
1. A method for controlling the illumination intensity of an LED table lamp is characterized by comprising the following steps:
emitting a standard white light beam to a paper surface, wherein the standard white light beam is perpendicular to the paper surface;
acquiring reflected light of the standard white light beam on the surface of the paper;
according to the CIE coordinate (X) of the reflected lightn，Yn) Acquiring the reflected light in the standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)c，Yc) The above-mentioned (X)c，Yc) Corresponding spectrum FCAnd the intensity of said reflected light
Light intensity relative to the standard white light beam
Amount of change of
According to (X)c，Yc)、FC、
And controlling the driving current of a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED in the LED desk lamp so that the spectrum of the reflected light of the paper is close to the saturation of the sunlight spectrum after the light beams emitted by the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED irradiate on the paper.
2. The method for controlling the illumination intensity of an LED desk lamp as claimed in claim 1, wherein the standard white light beam comprises several beams, each beam corresponding to one reflected light;
the CIE coordinate (X) according to the reflected lightn，Yn) Acquiring the reflected light in the standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)c，Yc) And the intensity of the reflected light
Relative to the standard white beam intensity
Amount of change of
The method comprises the following steps:
obtaining each of said reflected light at standard CIE coordinates (X)0,Y0) Offset amount (X) in (1)n-0,Yn-0) (ii) a Wherein, X1-0＝X1-X0，X2-0＝X2-X0，…，Xn-0＝Xn-X0；Y1-0＝Y1-Y0，Y2-0＝Y2-Y0，…，Yn-0＝Yn-Y0；
Calculating all of (X)N-0,YN-0) Mean value of (i.e. X)c＝AVERAGE(X1-0:Xn-0),Yc＝AVERAGE(Y1-0:Yn-0) To obtain said (X)c，Yc)；
Said (X)c，Yc) Corresponding to the standard CIE coordinate (X)0,Y0) Is the intensity of
3. Method for controlling the illumination intensity of an LED desk lamp according to claim 2, characterized in that the obtaining the offset (X)c，Yc) Corresponding spectrum FCThe method comprises the following steps:
obtaining each of (X)n-0,Yn-0) Corresponding spectrum Fn-0(ii) a Wherein, F1-0＝F1-F0，F2-0＝F2-F0，…，Fn-0＝Fn-F0；
Calculating all of said Fn-0Mean value of (i), i.e. FC＝AVERAGE(F1-0,Fn-0)；
Said FCThe light of the corresponding wavelength is used to compensate the spectrum absorbed by the paper.
4. Method for controlling the illumination intensity of an LED desk lamp according to claim 3, characterized in that, the method is based on (X)c，Yc)、FC、
Control the drive power of warm light LED, cold light LED, red light LED, blue light LED and green light LED in LED table lampA streaming step, comprising the steps of:
according to the light intensity difference
Information and said (X)c，Yc) The information output corresponds to prestored first current intensity information, the first current intensity information is used for indicating a current value for driving the warm light LED to emit light and a current value for driving the cold light LED to emit light, and the current values enable the light emitted by the warm light LED and the cold light LED to be mixed to compensate the light intensity difference
5. The method for controlling the illumination intensity of the LED table lamp according to claim 4, further comprising:
according to said spectrum FCOutputting corresponding second current intensity information; the second current intensity signal is used for indicating a current value for driving the red light LED to emit light, a current value for driving the blue light LED to emit light and a current value for driving the green light LED to emit light, and the current values enable the spectrum of light generated by mixing the light emitted by the red light LED, the light emitted by the blue light LED and the light emitted by the green light LED to be FC。
6. A system for controlling the illumination intensity of an LED table lamp, comprising:
the LEDs comprise a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED;
the emission probe is used for emitting a standard white light beam to the surface of the paper, and the standard white light beam is vertical to the surface of the paper;
a receiving probe for receiving the reflected light of the standard white light beam on the surface of the paper;
a signal processor connected with the transmitting probe and the receiving probe and used for processing the CIE coordinate (X) of the reflected lightn，Yn) Acquiring the reflected light in the standard CIE coordinate (X)0,Y0) In (1)Offset (X)c，Yc) And the (X)c，Yc) Corresponding spectrum FCIntensity of the reflected light
Light intensity relative to the standard white light beam
Amount of change of
A dimming driver connected with the signal processing module and the LED for adjusting the dimming according to the (X)c，Yc)、FC、
And controlling the driving current of a warm light LED, a cold light LED, a red light LED, a blue light LED and a green light LED in the LED desk lamp so that the spectrum of the reflected light of the paper is close to the saturation of the sunlight spectrum after the light beams emitted by the warm light LED, the cold light LED, the red light LED, the blue light LED and the green light LED irradiate on the paper.
7. The system of claim 6, wherein the signal processor comprises:
a signal conversion module for obtaining each reflected light in a standard CIE coordinate (X)0,Y0) Offset amount (X) in (1)n-0,Yn-0) Each of (X) ton-0,Yn-0) Corresponding spectrum Fn-0(ii) a Wherein, X1-0＝X1-X0，X2-0＝X2-X0，…，Xn-0＝Xn-X0；Y1-0＝Y1-Y0，Y2-0＝Y2-Y0，…，Yn-0＝Yn-Y0；F1-0＝F1-F0，F2-0＝F2-F0，…，Fn-0＝Fn-F0；
Calculating all of (X)N-0,YN-0) Mean value of (i.e. X)c＝AVERAGE(X1-0:Xn-0),Yc＝AVERAGE(Y1-0:Yn-0) To obtain said (X)c，Yc) (ii) a Said (X)c，Yc) Corresponding to the standard CIE coordinate (X)0,Y0) Is the intensity of
Calculating all of said Fn-0Mean value of (i), i.e. FC＝AVERAGE(F1-0,Fn-0)。
Said FCThe light of the corresponding wavelength is used to compensate the spectrum absorbed by the paper.
8. The system of claim 7, wherein the signal processor further comprises:
and the signal filtering module is connected between the receiving probe and the signal conversion module and is used for filtering noise in the reflected light.
9. The system of claim 7, wherein the dimming driver comprises:
a signal receiving module connected with the signal conversion module and used for receiving the light intensity difference
Information and said (X)c，Yc) Outputting corresponding pre-stored first current intensity information according to the information, and outputting the corresponding pre-stored first current intensity information according to the spectrum FCOutputting corresponding second current intensity information; the first current intensity information is used for indicating a current value for driving the warm light LED to emit light and a current value for driving the cold light LED to emit light, and the current values enable the light emitted by the warm light LED and the cold light LED to be mixed to compensate the light intensity difference
The second current intensity signal is used for indicating a current value for driving the red light LED to emit light, a current value for driving the blue light LED to emit light and a current value for driving the green light LED to emit light, and the current values enable the spectrum of light generated by mixing the light emitted by the red light LED, the light emitted by the blue light LED and the light emitted by the green light LED to be FC。
And the dimming driving module is connected with the signal receiving module and used for receiving the first current intensity information to control the current intensity output to the warm light LED and the cold light LED and receiving the second current intensity information to control the current intensity output to the red light LED, the blue light LED and the green light LED.
10. The system of claim 8, wherein the dimming driver further comprises:
and the power amplification module is connected between the dimming driving module and the LED and used for amplifying the current output by the dimming driving module.
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