CN110290616A - LED calibration method, device and storage medium - Google Patents
LED calibration method, device and storage medium Download PDFInfo
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- CN110290616A CN110290616A CN201910608672.3A CN201910608672A CN110290616A CN 110290616 A CN110290616 A CN 110290616A CN 201910608672 A CN201910608672 A CN 201910608672A CN 110290616 A CN110290616 A CN 110290616A
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- color
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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
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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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
Abstract
The invention discloses a kind of LED calibration method, device and storage mediums, including detection LED to light intrinsic brilliance value when each color when the first duty ratio；The corresponding brightness ratio of each color is determined according to the intrinsic brilliance value and target brightness value of each color respectively；The corresponding duty ratio of each color is determined according to brightness ratio and the second duty ratio.The present invention passes through the brightness adjustment of each monochrome of LED, so that the brightness obtained after mixing reaches object brightness, this carries out the scheme of LED luminance calibration automatically, avoids detecting the error occurred manually, improves the accuracy of LED factory testing.
Description
Technical field
The present invention relates to LED technology field more particularly to a kind of LED calibration methods, device and storage medium.
Background technique
LED is widely used in various products at present, and each product will lead to each LED luminance not because of assembling and material difference
Unanimously, when finally installing LED to product, product is caused to go wrong, existing LED factory brightness detection often will
LED light after by manually carrying out brightness differentiation, be directly recycled in brightness exception, and artificial cognition accuracy is lower.
Summary of the invention
The main purpose of the present invention is to provide a kind of LED calibration method, device and storage mediums, it is intended to solve existing skill
By manually carrying out the low technical problem of LED luminance accuracy in detection in art.
To achieve the above object, the present invention provides a kind of LED calibration method, the LED calibration method the following steps are included:
LED is detected to light intrinsic brilliance value when each color when the first duty ratio；
The corresponding brightness ratio of each color is determined according to the intrinsic brilliance value and target brightness value of each color respectively；
The corresponding duty ratio of each color is determined according to the brightness ratio and the second duty ratio.
Optionally, the step that the corresponding duty ratio of each color is determined according to the brightness ratio and the second duty ratio
Before rapid, the LED calibration method further include:
The corresponding ginseng of each color value is determined according to the corresponding brightness ratio of each color value and first duty ratio
Examine duty ratio；
Determine each maximum value with reference in duty ratio as the second duty ratio.
Optionally, the step that the corresponding duty ratio of each color is determined according to the brightness ratio and the second duty ratio
Suddenly include:
Obtain the maximum brightness ratio in each brightness ratio；
Second duty ratio is set by the duty ratio of the corresponding color of the maximum brightness ratio, and is obtained except maximum
Color of object except the corresponding color of brightness ratio；
It is calculated according to the brightness ratio of each color of object, maximum brightness ratio and second duty ratio each described
The duty ratio of color of object.
Optionally, described according to the brightness ratio of each color of object, maximum brightness ratio and second duty ratio
The step of calculating the duty ratio of each color of object include:
The difference between maximum brightness ratio and the brightness ratio of each color of object is calculated, to obtain each color of object
Corresponding brightness ratio is poor；
Duty cycle difference is obtained according to the brightness ratio difference and second duty ratio；
Determine that the color of object is corresponding according to the duty cycle difference of each color of object and second duty ratio
Duty ratio.
Optionally, described to determine that each color is corresponding according to the intrinsic brilliance value and target brightness value of each color respectively
Brightness ratio the step of include:
Obtain the luminance difference between the target brightness value of each color and the intrinsic brilliance value；
The ratio between the luminance difference and target brightness value of each color is calculated as the brightness ratio.
Optionally, the step that the corresponding duty ratio of each color is determined according to the brightness ratio and the first duty ratio
After rapid, the LED calibration method further include:
Store first duty ratio and the corresponding duty ratio of each color.
Optionally, the target brightness value of each color is the LED test sample of preset quantity with first duty
The average value of intrinsic brilliance when than lighting.
In addition, to achieve the above object, the present invention also proposes that a kind of LED calibrating installation, the LED calibrating installation include depositing
Reservoir, processor and it is stored in the LED calibration procedure that can be run on the memory and on the processor, the school LED
The step of LED calibration method as described above is realized when quasi-ordering is executed by the processor.
In addition, to achieve the above object, the present invention also proposes a kind of computer readable storage medium, which is characterized in that institute
State and be stored with LED calibration procedure on computer readable storage medium, when the LED calibration procedure is executed by processor realize such as with
Above the step of LED calibration method.
LED calibration method proposed by the present invention detects LED to light intrinsic brilliance when each color when the first duty ratio
Value, determines the corresponding brightness ratio of each color according to the intrinsic brilliance value and target brightness value of each color respectively, according to
The brightness ratio and the first duty ratio determine the corresponding duty ratio of each color, by the brightness adjustment of each monochrome of LED,
So that the brightness obtained after mixing reaches object brightness, this carries out the scheme of LED luminance calibration automatically, avoids detecting appearance manually
Error, improve LED factory testing accuracy.
Detailed description of the invention
Fig. 1 is the flow diagram of one embodiment of LED calibration method of the present invention；
Fig. 2 is the functional block diagram of LED calibrating installation of the invention；
Fig. 3 is the flow diagram of another embodiment of LED calibration method of the present invention；
Fig. 4 is the refinement flow diagram that the duty ratio of each color is obtained in one embodiment of LED calibration method of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Referring to Fig.1, Fig. 1 is the flow diagram of one embodiment of LED calibration method of the present invention.In the embodiment, the school LED
Quasi- method the following steps are included:
S10 detects LED to light intrinsic brilliance value when each color when the first duty ratio；
First duty ratio is preset dutyfactor value, which can determine according to product specification, different
Corresponding first duty ratio of product is different, which is three primary colors, i.e. R (red), G (green) and three kinds of colors of B (indigo plant)；
The three primary colors lighted can be determined by the color of LED, for example when LED shines as orange light, the color for needing to light only needs
Including red and green, when LED shines as white light, the color for needing to light needs to include R (red), G (green) and B
(indigo plant) three kinds of colors.Intrinsic brilliance value is detected by luminance detection device, can light each color respectively, and set by installing
Luminance detection device near LED detects brightness.
S20 determines the corresponding brightness of each color according to the intrinsic brilliance value and target brightness value of each color respectively
Ratio；
Target brightness value is that LED needs object brightness to be achieved, which can be set by user, directly be set
LED needs object brightness to be achieved；It can also be obtained by LED intrinsic brilliance, i.e., the target brightness value of each color
The average value of intrinsic brilliance when being lighted for the LED test sample of preset quantity with first duty ratio, so that object brightness
Value is the brightness value that all LED can achieve, and the specific mode for obtaining target brightness value is as follows, first lights preset quantity with red
LED, detect the intrinsic brilliance of each LED, calculate the average value of each intrinsic brilliance as red target brightness value, then
The LED that preset quantity is lighted with green, is detected the intrinsic brilliance of each LED, calculates the average value of each intrinsic brilliance as green
The target brightness value of color, then with the blue LED for lighting preset quantity, detect the intrinsic brilliance of each LED, it is bright to calculate each reality
Target brightness value of the average value of degree as blue, the detection ordering of R, G and the B can according to need setting, do not limit
In above-mentioned detection ordering.
By the brightness ratio between intrinsic brilliance and object brightness can determine intrinsic brilliance and object brightness it
Between proportionate relationship, duty ratio can be modified under a proportional relationship, realize luminance compensation intrinsic brilliance is reached
To object brightness.
S30 determines the corresponding duty ratio of each color according to the brightness ratio and the second duty ratio.
The duty ratio of each color contrast can be allocated according to the second duty ratio and brightness ratio, so that each face
The duty ratio of color can reach object brightness after being adjusted.
The LED calibration method that the present embodiment proposes, detection LED are bright with reality when lighting each color when the first duty ratio
Angle value determines the corresponding brightness ratio of each color, root according to the intrinsic brilliance value and target brightness value of each color respectively
The corresponding duty ratio of each color is determined according to the brightness ratio and the second duty ratio, passes through the brightness tune of each monochrome of LED
Whole, so that the brightness obtained after mixing reaches object brightness, this carries out the scheme of LED luminance calibration automatically, avoids detecting manually
The error of appearance improves the accuracy of LED factory testing.
It is the functional block diagram of LED calibrating installation of the present invention referring to Fig. 2, Fig. 2.LED calibrating installation can be PC
For other special detection terminals, LED calibrating installation includes at least brightness detection module 110, processor 120 and memory
130, control system and LED calibration procedure in storage in memory 130；First duty ratio can be also pre- by user's manual setting
It is first stored in memory.
It is understood that the LED calibrating installation may also include communication module, which passes through communication module
It can be communicated with LED, the duty cycle transmissions after calibration are saved into LED, first can also be stored in the LED and is accounted for
Empty ratio.
Referring to Fig. 3, in one embodiment in Fig. 1 before step S30, further includes:
Step S40 determines each color value according to the corresponding brightness ratio of each color value and first duty ratio
It is corresponding to refer to duty ratio；
Brightness ratio can be calculated in several ways, such as step S20 includes: the object brightness for obtaining each color
Luminance difference between value and the intrinsic brilliance value；Calculate the ratio conduct between the luminance difference and target brightness value of each color
The brightness ratio, the then calculation formula of specific brightness ratio are as follows: K=(Lm-Ls)/Lm, wherein Ls is intrinsic brilliance value,
Lm is target brightness value, and K is brightness ratio, is calculated separately corresponding between the corresponding intrinsic brilliance of each color and object brightness
Brightness ratio.The corresponding corresponding calculation formula of duty ratio that refers to is specifically, PMVc=K × PWM1+PWM1, K is brightness ratio,
PWM1For the first duty ratio, PMVcWith reference to duty ratio, to substitute into the corresponding proportionate relationship of each color and the first duty respectively
Than obtaining red reference duty ratio R (PMVc), green reference duty ratio G (PMVc) and blue reference duty ratio B
(PMVc)。
Alternatively, step S20 includes: that the ratio obtained between the intrinsic brilliance value and target brightness value of each color is made
For the brightness ratio, then the calculation formula of brightness ratio are as follows: K=LS/Lm, wherein Ls is intrinsic brilliance value, and Lm is that target is bright
Angle value, K are brightness ratio, calculate separately corresponding brightness ratio between the corresponding intrinsic brilliance of each color and object brightness.
With reference to the corresponding calculation formula of duty ratio specifically, PMVc=2PWM1-PWM1K, K are brightness ratio, PWM1For the first duty ratio,
PMVcWith reference to duty ratio, to substitute into the corresponding proportionate relationship of each color and the first duty ratio respectively, red reference is obtained
Duty ratio R (PMVc), green reference duty ratio G (PMVc) and blue reference duty ratio B (PMVc)。
Step S50 determines each maximum value with reference in duty ratio as the second duty ratio.
The allocation proportion of the corresponding duty ratio of each color can be obtained according to brightness ratio and the second duty ratio.
Technical solution disclosed in the present embodiment directly carries out each color by reference to the maximum duty cycle in duty ratio
Duty ratio distribution, calculating process is relatively simple, while the setting base in above scheme using maximum duty cycle as duty ratio
Plinth can satisfy the requirement of the corresponding duty ratio of each color.
It is understood that in other variant embodiments, the second duty ratio can by user's manual setting, such as this second
Duty ratio can be maximum duty cycle 255, can also be other numerical value, be configured by user according to the type or needs of LED.
It is the refinement schematic diagram of step S30 in embodiment corresponding to Fig. 1, in the present embodiment, step referring to Fig. 4, Fig. 4
S30 includes:
Step S31 obtains the maximum brightness ratio in each brightness ratio；
Such as the brightness ratio of red brightness ratio Kr=0, blue is kb=0.07, the brightness ratio of green is Kg=
0.01, then maximum brightness ratio is kb.
Step S32 sets second duty ratio for the duty ratio of the corresponding color of the maximum brightness ratio, and obtains
Remove the color of object except the corresponding color of maximum brightness ratio；
When maximum brightness ratio is kb, the second duty ratio, such as R (PMV are set by the corresponding duty ratio of bluec)、G
(PMVc) and B (PMVc) in maximum value be R (PMVc), then R (PMV is set by the corresponding duty ratio PMVb of kbc)。
Step S33 is calculated according to the brightness ratio of each color of object, maximum brightness ratio and second duty ratio
The duty ratio of each color of object.
Specifically, it is calculated according to the brightness ratio of each color of object, maximum brightness ratio and second duty ratio
The step of duty ratio of each color of object includes:
The difference between maximum brightness ratio and the brightness ratio of each color of object is calculated, to obtain each color of object
Corresponding brightness ratio is poor；
Duty cycle difference is obtained according to the brightness ratio difference and second duty ratio；
Determine that the color of object is corresponding according to the duty cycle difference of each color of object and second duty ratio
Duty ratio.
The calculation formula of the duty ratio of color of object is that PMVm=[PMVmax-PMVmax (Kmax-km)], Km is target
The brightness ratio of color, PMVm are the duty ratio of color of object, and PMVmax is the second duty ratio, and Kmax is maximum brightness ratio.
Above-mentioned calculating process is illustrated with example below, when the duty ratio of blue is set as the second duty ratio, on
Stating the m in formula can be replaced r or g to calculate, such as PMVr=[PMVmax-PMVmax (Kmax-kr)], PMVr are red
Duty ratio, kr are red proportionality coefficient, and similarly PMVg=[PMVmax-PMVmax (Kmax-kg)], PMVg are green to green
Duty ratio, kr are the proportionality coefficient of green.
In the above-described embodiments, after obtaining the corresponding duty ratio of each color, store first duty ratio and
The corresponding duty ratio of each color, is controlled in lightening LED lamp according to the duty ratio prestored in order to subsequent.
Calibration process is illustrated below by way of specific data, specific as follows in order to understand above-mentioned technical proposal:
It is PMW1 respectively with red, green and blue lightening LED lamp with duty ratio, it is respectively red, green for detecting LED to be
Intrinsic brilliance when color and blue is followed successively by LSr, LSg and LSb, while red, green and the corresponding target of blue are bright
Degree is followed successively by Lmr, Lmg and Lmb, then red corresponding brightness ratio is Kr=(Lmr-LSr)/Lmr, similarly green corresponding
Brightness ratio is Kg=(Lmg-LSg)/Lmg, and the corresponding brightness ratio of blue is Kb=(Lmb-LSb)/Lmb, then red corresponding
Reference duty ratio be R (PMVc)=Kr × PWM1+PWM1, the corresponding reference duty ratio of green is G (PMVc)=Kg × PWM1+
PWM1, the corresponding reference duty ratio of blue is B (PMVc)=Kb × PWM1+PWM1, the maximum value in three duty ratios is taken, such as
The duty ratio of blue is maximum, then sets the second duty ratio for the reference duty ratio of blue, then accounting for when final LED is blue
Sky ratio PMVb is B (PMVc), then red corresponding duty ratio is PMVr=[PMVmax-PMVmax (Kmax-kr)], and green is corresponding
Duty ratio be PMVg=[PMVmax-PMVmax (Kmax-kg)], after obtaining PMVr, PMVg, PMVb, by PMVr, PMVg,
PMVb and PMV1 association saves.
The present invention also proposes a kind of LED calibrating installation, and in one embodiment, LED calibrating installation includes memory, processor
And it is stored in the LED calibration procedure that can be run on the memory and on the processor, the LED calibration procedure is described
The step of LED calibration method as described above in Example is realized when processor executes.
The present invention also proposes a kind of computer readable storage medium, is stored with LED on the computer readable storage medium
Calibration procedure, the LED calibration procedure realize the step of LED calibration method as described above in Example when being executed by processor
Suddenly.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage as above
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server, controlled terminal or network equipment etc.) method that executes each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of LED calibration method, which is characterized in that the LED calibration method the following steps are included:
LED is detected to light intrinsic brilliance value when each color when the first duty ratio；
The corresponding brightness ratio of each color is determined according to the intrinsic brilliance value and target brightness value of each color respectively；
The corresponding duty ratio of each color is determined according to the brightness ratio and the second duty ratio.
2. LED calibration method as described in claim 1, which is characterized in that described to be accounted for according to the brightness ratio and second
Before the step of sky more corresponding than each color of determination duty ratio, the LED calibration method further include:
Determine that the corresponding reference of each color value accounts for according to the corresponding brightness ratio of each color value and first duty ratio
Empty ratio；
Determine each maximum value with reference in duty ratio as the second duty ratio.
3. the LED calibration method as described in claim 1, which is characterized in that described according to the brightness ratio and the
Two duty ratios determine that the step of each color corresponding duty ratio includes:
Obtain the maximum brightness ratio in each brightness ratio；
Second duty ratio is set by the duty ratio of the corresponding color of the maximum brightness ratio, and obtains and removes maximum brightness
Color of object except the corresponding color of ratio；
Each target is calculated according to the brightness ratio of each color of object, maximum brightness ratio and second duty ratio
The duty ratio of color.
4. LED calibration method as claimed in claim 3, which is characterized in that the brightness ratio according to each color of object,
The step of maximum brightness ratio and second duty ratio calculate the duty ratio of each color of object include:
The difference between maximum brightness ratio and the brightness ratio of each color of object is calculated, it is corresponding to obtain each color of object
Brightness ratio it is poor；
Duty cycle difference is obtained according to the brightness ratio difference and second duty ratio；
The corresponding duty of the color of object is determined according to the duty cycle difference of each color of object and second duty ratio
Than.
5. LED calibration method as described in claim 1, which is characterized in that described respectively according to the intrinsic brilliance of each color
Value and target brightness value determine that the step of each color corresponding brightness ratio includes:
Obtain the luminance difference between the target brightness value of each color and the intrinsic brilliance value；
The ratio between the luminance difference and target brightness value of each color is calculated as the brightness ratio.
6. LED calibration method as described in any one in claim 1-5, which is characterized in that it is described according to the brightness ratio with
And first after duty ratio the step of determining each color corresponding duty ratio, the LED calibration method further include:
Store first duty ratio and the corresponding duty ratio of each color.
7. LED calibration method as described in any one in claim 1-5, which is characterized in that the object brightness of each color
Value is the average value of the intrinsic brilliance when LED test sample of preset quantity is lighted with first duty ratio.
8. a kind of LED calibrating installation, which is characterized in that the LED calibrating installation includes memory, processor and is stored in described
On memory and the LED calibration procedure that can run on the processor, when the LED calibration procedure is executed by the processor
It realizes as described in claim 1-7 is described in any item the step of LED calibration method.
9. a kind of computer readable storage medium, which is characterized in that be stored with LED calibration on the computer readable storage medium
Program realizes such as LED calibration method of any of claims 1-7 when the LED calibration procedure is executed by processor
The step of.
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| CN112348906A (en) * | 2021-01-07 | 2021-02-09 | 卡莱特（深圳）云科技有限公司 | Method and device for recommending brightness loss percentage in LED screen correction process |
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| CN110290616B (en) | 2021-08-27 |
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