CN109980499A - The white balance adjusting method and system of RGB laser light source - Google Patents
The white balance adjusting method and system of RGB laser light source Download PDFInfo
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- CN109980499A CN109980499A CN201910298506.8A CN201910298506A CN109980499A CN 109980499 A CN109980499 A CN 109980499A CN 201910298506 A CN201910298506 A CN 201910298506A CN 109980499 A CN109980499 A CN 109980499A
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- light
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- white balance
- feux rouges
- brightness value
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0427—Electrical excitation ; Circuits therefor for applying modulation to the laser
Abstract
The invention discloses a kind of white balance adjusting method of RGB laser light source and systems, technical solution of the present invention may determine that feux rouges R, whether the respective currently practical brightness value of green light G and blue light B meets brightness regulation condition, when meeting the brightness regulation condition, it can be based on predetermined luminance adjusting method, adjust feux rouges R, the brightness of at least one of green light G and blue light B, so that feux rouges R, green light G and blue light B meet white balance adjusting, it can be seen that, technical solution of the present invention can export the white light of different brightness, and it is able to maintain in the white light of output, feux rouges R, green light G and blue light B meet white balance conditions.
Description
Technical field
The present invention relates to laser light source control technology fields, more specifically, being related to a kind of white balance of RGB laser light source
Adjusting method and system.
Background technique
With the continuous development of science and technology, laser light source is widely used in the electronic equipment of illumination and display field
In, these electronic equipments are popularized, and bring huge convenience for daily life and work, becoming current people can not
Or scarce important tool.
Currently, conventional laser light source generally cannot directly export white light, the laser module of tri- kinds of colors of RGB is needed simultaneously
It uses, finally convergence is that white light exports, and can only export the white light of single brightness.After brightness decay occurs for laser or need
When exporting the white light of other brightness, then it can change because of tri- kinds of color laser proportions of RGB, so that correct ginseng cannot be exported
Several white lights, white balance change, in some instances it may even be possible to lead to serious colour cast problem.
Summary of the invention
In view of this, technical solution of the present invention provides the white balance adjusting method and system of a kind of RGB laser light source,
The white light of different brightness can be exported, and is able to maintain in the white light of output, feux rouges R, green light G and blue light B meet white balance item
Part.
To achieve the goals above, the invention provides the following technical scheme:
A kind of white balance adjusting method of RGB laser light source, the white balance adjusting method include:
Obtain feux rouges R, green light G and the respective currently practical brightness value of blue light B；
Judge whether feux rouges R, green light G and the respective currently practical brightness value of blue light B meet brightness regulation condition；
If so, being based on predetermined luminance adjusting method, the brightness of at least one of feux rouges R, green light G and blue light B are adjusted, is made
It obtains feux rouges R, green light G and blue light B and meets white balance conditions.
Preferably, in above-mentioned white balance adjusting method, judge whether that the method for meeting brightness regulation condition includes:
Respectively based on the respective current theoretical brightness value of feux rouges R, green light G and blue light B and feux rouges R, green light G and blue light B
Currently practical brightness value, judge whether to meet brightness regulation condition.
Preferably, described to be based on feux rouges R, green light G and the respective current reason of blue light B in above-mentioned white balance adjusting method
By brightness value and feux rouges R, green light G and the respective currently practical brightness value of blue light B, judge whether to meet brightness regulation condition,
Include:
Be respectively compared each color light currently practical brightness value and currently practical theoretical value difference, if there is at least one
The difference of kind color of light is more than given threshold, then meets the brightness regulation condition, conversely, being then unsatisfactory for the brightness regulation item
Part.
Preferably, it in above-mentioned white balance adjusting method, before judging whether to meet the brightness regulation condition, also wraps
It includes:
Calculate feux rouges R, green light G and the respective current theoretical brightness value of blue light B.
Preferably, in above-mentioned white balance adjusting method, the calculating feux rouges R, green light G and the respective current reason of blue light B
By brightness value, comprising:
When obtaining the RGB laser light source output white light, the white balance brightness proportion of feux rouges R, green light G and blue light B；
It is matched based on the theoretical brightness value for currently needing to export white light and the white balance brightness, calculates feux rouges R, green light
The respective current theoretical brightness value of G and blue light B.
Preferably, in above-mentioned white balance adjusting method, the acquisition feux rouges R, green light G and the respective current reality of blue light B
Border brightness value, comprising:
Feux rouges R, green light G and the respective currently practical brightness value of blue light B are obtained by optical sensor.
Preferably, it in above-mentioned white balance adjusting method, according to the clocked sequential of setting, periodically executes described white flat
Weigh adjusting method.
Preferably, in above-mentioned white balance adjusting method, the brightness adjusting method includes:
Successively adjust feux rouges R, green light G and blue light B brightness so that the brightness of three meet white balance proportion, and with work as
The preceding white brightness value matching for needing to export.
Preferably, in above-mentioned white balance adjusting method, feux rouges R, green light G are identical with the brightness adjusting method of blue light B, right
When any color of light carries out brightness regulation, which includes:
Judge whether the currently practical brightness value of the color of light is equal to current theoretical brightness value；
If so, completing the brightness regulation process of the color of light；
If not, judging whether the currently practical brightness value of the color of light is less than its current theoretical brightness value；
If not, the brightness for reducing the color of light completes the brightness regulation mistake of the color of light to its current theoretical brightness value
Journey；
If so, judge whether can be by the brightness of the color of light to increasing to its current theoretical brightness value；
If so, the brightness of the color of light is maintained to be in its current theoretical brightness value, the brightness regulation of the color of light is completed
Process；
If not, the maximum brightness of white balance brightness proportion and the color of light based on feux rouges R, green light G and blue light B
Value calculates the current theoretical brightness value after feux rouges R, green light G and blue light B are respectively proofreaded.
The present invention also provides a kind of white balance adjusting systems of RGB laser light source, which is characterized in that the white balance tune
Section system includes:
Optical sensor, the optical sensor is for detecting feux rouges R, green light G and the respective currently practical brightness value of blue light B；
Control circuit, the control circuit is for executing white balance adjusting method described in any of the above embodiments.
As can be seen from the above description, technical solution of the present invention provide RGB laser light source white balance adjusting method and
In system, it can be determined that whether feux rouges R, green light G and the respective currently practical brightness value of blue light B meet brightness regulation condition,
When meeting the brightness regulation condition, it can be based on predetermined luminance adjusting method, adjusted in feux rouges R, green light G and blue light B at least
The brightness of one, so that feux rouges R, green light G and blue light B meet white balance adjusting, it is seen then that technical solution of the present invention can export not
It with the white light of brightness, and is able to maintain in the white light of output, feux rouges R, green light G and blue light B meet white balance conditions.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is brightness decay curve's figure of three coloured light in RGB laser light source；
Fig. 2 is a kind of flow diagram of the white balance adjusting method of RGB laser light source provided in an embodiment of the present invention；
Fig. 3 is a kind of method flow diagram of RGB laser light source three primary colours brightness regulation provided in an embodiment of the present invention；
Fig. 4 is a kind of flow chart of monochromatic brightness adjusting method provided in an embodiment of the present invention；
Fig. 5 is the flow diagram of the white balance adjusting method of another kind RGB laser light source provided in an embodiment of the present invention；
Fig. 6 is the white light brightness decay curve using the RGB laser light source of white balance adjusting method of the embodiment of the present invention
Figure；
Fig. 7 is a kind of structural schematic diagram of the white balance adjusting system of RGB laser light source provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
White balance is the Xiang Zhibiao for describing red-green-blue mixing and generating white precision.For laser field, pass through
The different brightness of three kinds of coloured light of RGB are exported, to keep the white light white balance of output constant, also referred to as guarantee the color of light source
Temperature is constant.RGB laser light source in the embodiment of the present invention is identical as RGB laser light source meaning, refers to using can produce
The semiconductor laser tube (LD) of red-green-blue is a kind of light source that white light is generated by inner couplings.The RGB laser light
Source includes semiconductor laser diode, and semiconductor laser tube has resonant cavity, and outgoing is coherent light.For the white light for guaranteeing output
Light source color temperature reaches specified value, and RGB laser light source needs the export ratio to three kinds of colour light sources to be adjusted, that is, need into
Row white balance adjusting.To guarantee light source in the process of running and when output brightness changes, the white light of output is to stablize
Colour temperature, need that the white balance of light source is adjusted to reach requirement.
Scheme with reference to the brightness decay curve that Fig. 1, Fig. 1 are three coloured light in RGB laser light source, in Fig. 1, horizontal axis is the time, is indulged
Axis is relative luminance, and as shown in Figure 1, in RGB laser light source, the brightness decay of red-green-blue is different, and the brightness of feux rouges declines
Deceleration is most fast, and the brightness decay speed of blue light is most slow, the brightness decay of the brightness decay speed of green light between feux rouges and blue light
Between speed.
In the prior art, the controlling function of RGB laser light source white balance is proofreaded or can only be exported single before dispatching from the factory
The white light of brightness, is not adjustable white brightness, and the white light of correct parameter cannot be exported when exporting brightness and changing；And work as
When laser uses the time longer, since the brightness decay speed of three primary colours is different, colour cast will cause；Since temperature changes,
Laser output brightness can change, and cause the white light colour cast of output.
To solve the above-mentioned problems, the embodiment of the invention provides a kind of white balance adjusting method of RGB laser light source with
And system, it can make RGB laser light source that can export the white light of correct parameter, the white light of output during whole service
Brightness it is adjustable, can dynamically adjust the output of three primary colours, to ensure that white light color temperature constant, meet white balance and stablize
Requirement, meet the demand of different brightness white light sources, also avoid laser output and colour cast caused due to brightness decay
Problem.
With reference to Fig. 2, Fig. 2 is a kind of process of the white balance adjusting method of RGB laser light source provided in an embodiment of the present invention
Schematic diagram, this method comprises:
Step S11: feux rouges R, green light G and the respective currently practical brightness value of blue light B are obtained.
In the step, feux rouges R, green light G and the respective currently practical brightness value of blue light B can be obtained by optical sensor.
The optical sensor is digital rgb color sensor, is swashed by setting light channel structure and can acquire RGB laser light source and currently export
The respective brightness of the three primary colours of radiant is extremely.The measurement accuracy of the sensor can achieve one thousandth, ensure that measurement accuracy.
Step S12: judge whether feux rouges R, green light G and the respective currently practical brightness value of blue light B meet brightness regulation item
Part.
Step S13: if so, being based on predetermined luminance adjusting method, at least one of feux rouges R, green light G and blue light B are adjusted
Brightness so that feux rouges R, green light G and blue light B meet white balance conditions.
Step S14: if not, being not necessarily to brightness regulation, current to export in white light, feux rouges R, green light G and blue light B meet white flat
Weighing apparatus condition.
In the embodiment of the present invention, judge whether that the method for meeting brightness regulation condition includes: based on feux rouges R, green light G and indigo plant
The respective current theoretical brightness value of light B and feux rouges R, green light G and the respective currently practical brightness value of blue light B, judge whether full
Sufficient brightness regulation condition.
Specifically, described based on the respective current theoretical brightness value of feux rouges R, green light G and blue light B and feux rouges R, green light G
With the respective currently practical brightness value of blue light B, judge whether to meet brightness regulation condition, comprising: be respectively compared each color light
Currently practical brightness value and currently practical theoretical value difference, if there is at least one color of light difference be more than setting threshold
Value, then be unsatisfactory for the brightness regulation condition, conversely, then meeting the brightness regulation condition.The threshold value can such as be set as 0,
As long as at this point, having the intrinsic brilliance value of one not equal to it in feux rouges R, green light G and the respective currently practical brightness value of blue light B
Theoretical brightness value then meets the brightness regulation condition, conversely, being then unsatisfactory for the brightness regulation condition.The given threshold
It can set according to demand, the given threshold is smaller, and the degree of regulation of the white balance adjusting method is higher, otherwise white balance adjusting
The degree of regulation of method is lower, not in inventive embodiments, is not specifically limited to the given threshold.
Before judging whether to meet the brightness regulation condition, further includes: calculate feux rouges R, green light G and blue light B respectively
Current theoretical brightness value.Specifically, the calculating feux rouges R, green light G and the respective current theoretical brightness value of blue light B, comprising:
When obtaining the RGB laser light source output white light, the white balance brightness proportion of feux rouges R, green light G and blue light B, the white balance brightness
Proportion is a fixed proportion constant；It is matched based on the theoretical brightness value for currently needing to export white light and the white balance brightness,
Calculate feux rouges R, green light G and the respective current theoretical brightness value of blue light B.
In white balance adjusting method described in the embodiment of the present invention, according to the clocked sequential of setting, periodically described in execution
White balance adjusting method.Cycle length can be set based on demand, as the period can realize that high frequency calls the white balance with 20ms
Adjusting method avoids that the visible colour temperature deviation of human eye occurs in human eye detecting period section.
In white balance adjusting method described in the embodiment of the present invention, the brightness adjusting method include: successively adjust feux rouges R,
The brightness of green light G and blue light B so that the brightness of three meets white balance proportion, and with the white brightness value that currently needs to export
Matching.
Refering to what is shown in Fig. 3, Fig. 3 is a kind of side of RGB laser light source three primary colours brightness regulation provided in an embodiment of the present invention
Method flow chart, this method comprises:
Step S21: brightness regulation is carried out to feux rouges R by feux rouges luminance adjustment module.
Step S22: brightness regulation is carried out to green light G by green light luminance adjustment module.
Step S23: brightness regulation is carried out to blue light B by blue light brightness adjustment module.
Its brightness can be adjusted by adjusting the respective luminous power of three primary colours.The brightness regulation includes: to increase the function that shines
Rate is to improve brightness, or reduces luminous power to reduce brightness, or keep luminous power constant to maintain brightness constant.Based on figure
Method shown in 3 can successively adjust the brightness of feux rouges R, green light G and blue light B, so that the brightness of three meets white balance proportion, and
With currently the white brightness value exported is needed to match.Brightness regulation is carried out to three primary colours according to the rate of decay of three primary colours, it is same
During the white balance adjusting in period, the fireballing color of light of brightness decay formerly carries out brightness regulation, in its brightness decay
When being unsatisfactory for current theoretical brightness value greatly, can using the maximum brightness value that it can currently be exported as its theoretical brightness value, with
Realize that its maximum brightness exports.
In white balance adjusting method described in the embodiment of the present invention, the brightness adjusting method phase of feux rouges R, green light G and blue light B
Together, when carrying out brightness regulation to any color of light, the brightness regulation process is as shown in figure 4, Fig. 4 is provided in an embodiment of the present invention
A kind of flow chart of monochromatic brightness adjusting method, this method comprises:
Step S31: judge whether the currently practical brightness value of the color of light is equal to current theoretical brightness value.
When starting to carry out brightness regulation to the color of light, judge that optical sensor acquires the currently practical brightness of the color of light and is
It is no to be equal to its current theoretical brightness value, if so, S37 is entered step, if not, entering step S32.It is current real as above-mentioned
Border brightness value is calculated and is obtained based on the theoretical brightness value for needing to export white light and white balance brightness proportion.
Step S32: if not, judging whether the currently practical brightness value of the color of light is less than its current theoretical brightness value.
In the step, if the currently practical brightness value of the color of light is needed not equal to its theoretical brightness value to the face
Coloured light carries out brightness regulation, by judging whether the currently practical brightness value of the color of light is less than its current theoretical brightness value, base
It determines the need for carrying out brightness regulation to it in judging result, if not, S33 is entered step, if so, entering step S34.
It is to correspond to output power by adjusting it to export this to the mode that three primary colours light carries out brightness regulation in the embodiment of the present invention
The brightness of color of light.
Step S33: if not, the brightness for reducing the color of light completes the bright of the color of light to its current theoretical brightness value
Spend adjustment process.
In the step, if the currently practical brightness value of the color of light is greater than its current theoretical brightness value, it is only necessary to pass through
It reduces it and corresponds to output power, to reduce the intrinsic brilliance of the color of light, so that the brightness of the color of light is equal to its current theory
The brightness regulation process of the color of light can be completed in brightness value.
Step S34: if so, judging whether can be by the brightness of the color of light to increasing to its current theoretical brightness value.
In the step, if the currently practical brightness value of the color of light is less than its current theoretical brightness value, need to pass through increasing
Its big brightness value is to complete brightness regulation process.Process needs judge whether can be by the brightness of the color of light to increasing to it
Current theory brightness value, if it is S35 is entered step, if not, entering step S36.
Step S35: if so, the brightness of the color of light is maintained to be in its current theoretical brightness value, the color of light is completed
Brightness regulation process.
In the step, if the brightness of the color of light can increase to its current theoretical brightness value, show color light
Spend it is adjustable to current need to export corresponding brightness when white light, maintain the brightness of the color of light to be in its current theoretical brightness
Value, completes the brightness regulation process of the color of light.
Step S36: if not, white balance brightness proportion and the color of light based on feux rouges R, green light G and blue light B are most
Big brightness value calculates the current theoretical brightness value after feux rouges R, green light G and blue light B are respectively proofreaded.
If the brightness of the color of light cannot increase to its current theoretical brightness value, show that the color brightness cannot be adjusted
Section is unable to satisfy white balance brightness proportion to brightness corresponding when currently needing to export white light.It needs to increase the color of light at this time
Greatly to the maximum brightness value that it can be increased to, is matched based on the brightness value and white balance brightness, feux rouges R, green light G can be calculated
With the current theoretical brightness value after the respective check and correction of blue light B.During the white balance adjusting of same period, to color light
After the completion of degree is adjusted, when being carried out to other color of light for not carrying out brightness regulation, based on working as after the check and correction of other described color of light
Preceding theory brightness value carries out brightness regulation.
Step S37: if so, completing the brightness regulation process of the color of light.
In the step, if the currently practical brightness value of the color of light its be equal to theoretical brightness value, without adjusting its correspondence
Output power maintains the currently practical brightness of its brightness constant, completes the brightness regulation process of the color of light.
Based on foregoing description it is found that specific execution process such as Fig. 5 institute of white balance adjusting method described in the embodiment of the present invention
Show.
With reference to Fig. 5, Fig. 5 is the stream of the white balance adjusting method of another kind RGB laser light source provided in an embodiment of the present invention
Journey schematic diagram, this method comprises:
Step S41: the white balance brightness proportion of RGB laser is read.
Step S42: the theoretical brightness value of current white light to be output is obtained.
Step S43: the corresponding theoretical brightness value of three primary colours is calculated.
Such as above-mentioned in the step, the theoretical brightness value based on white balance brightness proportion and current white light to be output can be with
Calculate the corresponding theoretical brightness value of RGB three primary colours.
Step S44: reading measurement value sensor, obtains the respective intrinsic brilliance value of RGB three primary colours.
Step S45: judge whether to meet brightness regulation condition.
Judgment mode can refer to foregoing description, and details are not described herein.
Step S46: if it is not, then completing a white balance adjusting, other tasks can be executed.
Step S47: if so, being based on predetermined luminance adjusting method, the brightness of at least one of three primary colours is adjusted, so that three
Primary colours meet white balance conditions.
In the step, brightness adjusting method can refer to foregoing description, and details are not described herein.
With reference to Fig. 6, Fig. 6 is the assorted brightness using the RGB laser light source of white balance adjusting method of the embodiment of the present invention
Attenuation curve figure, it will be appreciated from fig. 6 that the assorted brightness of the RGB laser light source using white balance adjusting method of the embodiment of the present invention
Rate of decay is identical, when exporting different brightness whites, can satisfy white balance conditions.White balance brightness proportion can be based on needing
Colour temperature is wanted to set, the white balance brightness proportion of RGB is not limited to mode shown in Fig. 6 in the embodiment of the present invention.No matter which kind of is used
White balance brightness proportion, the technical solution, can make RGB synchronous fading through the embodiment of the present invention, guarantee the white balance
Brightness proportion, to avoid colour cast problem.
As can be seen from the above description, inspection can be implemented by sensor in white balance adjusting method described in the embodiment of the present invention
The brightness of light source output is surveyed, and frequency (time that the period is arranged) is adjusted by setting, the calling of high frequency may be implemented, thus
It ensure that the white balance of output white light is stablized.
In a calling process, the white balance brightness proportion of three primary colours light can read first, based on what is currently exported
White brightness can calculate the corresponding theoretical brightness value of three primary colours light.Under the conditions of the white brightness currently to be exported, point
The intrinsic brilliance value and theoretical brightness value difference for not comparing white light, when which is more than given threshold, call brightness regulation side
Assorted brightness is adjusted in method, if white light corresponds to difference and is no more than the given threshold, completes this white balance
Adjustment process.Based on the setting period, the white balance adjusting method can be periodically called, ensure that the real-time of adjusting.
When adjusting brightness, three primary colours carry out brightness regulation respectively, therefore brightness regulation is divided into three parts: feux rouges brightness tune
Section, green light brightness regulation and blue light brightness are adjusted.Adjust that priority is for example above-mentioned is followed successively by feux rouges > green light > blue light.Three primary colours are equal
Using same brightness adjusting method, only respective calling sequence is different.The above-mentioned loop cycle of brightness regulation base friend uses, real
The purpose adjusted when real.
By taking feux rouges brightness regulation as an example, when detecting that the brightness of feux rouges is identical as its current theoretical brightness, feux rouges is completed
Brightness regulation process, green light brightness regulation can be executed.When detecting that feux rouges brightness is less than its current theoretical brightness, increase
Its brightness value, if its brightness value can increase to its current theoretical brightness value, (feux rouges brightness value reaches or not up to it is most
Big brightness value), then the brightness regulation process of feux rouges is completed, green light brightness regulation can be executed.If feux rouges brightness value has increased
Its maximum brightness value is arrived greatly, and still less than its current theoretical brightness value, is then needed on the basis of the maximum brightness value, and based on white
Equilbrium brightness proportion, recalculates the respective present intensity value of three primary colours.With the present intensity value that recalculates to green light and indigo plant
Light carries out brightness regulation.When the brightness for detecting feux rouges is greater than its current theoretical brightness value, its brightness is directly reduced, because
It can achieve 0 for feux rouges minimum brightness, therefore the adjusting of the direction centainly can specify requirement.It, can be with after having executed the task
Execute green light brightness regulation.The above are the adjusting methods for feux rouges brightness, for blue light and green light, and use this kind of method
It is adjusted, this method calls frequency high, it is ensured that exports stable white light.
As can be seen from the above description, white balance adjusting method described in the embodiment of the present invention can be bright with automatic collection white light source
Various monochromatic brightness in degree and RGB three primary colours, can ensure that light source white balance is steady with real-time control light source output colour temperature
It is fixed, enable light source to export white light at different brightnesses, extends light source and use approach.
Based on the above embodiment, another embodiment of the present invention additionally provides a kind of white balance adjusting system of RGB laser light source
System, the system is as shown in fig. 7, Fig. 7 is a kind of knot of the white balance adjusting system of RGB laser light source provided in an embodiment of the present invention
Structure schematic diagram, the white balance adjusting system include:
Optical sensor 11, the optical sensor 11 is for detecting feux rouges R, green light G and the respective currently practical brightness of blue light B
Value；
Control circuit 12, the control circuit 12 is for executing white balance adjusting method described in above-described embodiment.
White balance adjusting system described in the embodiment of the present invention can be with each in the brightness of automatic collection white light source and RGB three primary colours
The monochromatic brightness of kind can be ensure that light source white balance is stablized, be enabled light source not with real-time control light source output colour temperature
With white light is exported under brightness, extends light source and use approach.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that article or equipment including a series of elements not only include those elements, but also
It including other elements that are not explicitly listed, or further include for this article or the intrinsic element of equipment.Do not having
In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that in the article including above-mentioned element
Or there is also other identical elements in equipment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of white balance adjusting method of RGB laser light source, which is characterized in that the white balance adjusting method includes:
Obtain feux rouges R, green light G and the respective currently practical brightness value of blue light B；
Judge whether feux rouges R, green light G and the respective currently practical brightness value of blue light B meet brightness regulation condition；
If so, being based on predetermined luminance adjusting method, the brightness of at least one of feux rouges R, green light G and blue light B are adjusted, so that red
Light R, green light G and blue light B meet white balance conditions.
2. white balance adjusting method according to claim 1, which is characterized in that judge whether to meet brightness regulation condition
Method includes:
Based on respective current theory brightness value and feux rouges R, the green light G of feux rouges R, green light G and blue light B and blue light B is respective works as
Preceding intrinsic brilliance value judges whether to meet brightness regulation condition.
3. white balance adjusting method according to claim 2, which is characterized in that described to be based on feux rouges R, green light G and blue light B
Respective current theoretical brightness value and feux rouges R, green light G and the respective currently practical brightness value of blue light B, judge whether to meet bright
Spend adjusting condition, comprising:
Be respectively compared each color light currently practical brightness value and currently practical theoretical value difference, if there is at least one face
The difference of coloured light is more than given threshold, then meets the brightness regulation condition, conversely, being then unsatisfactory for the brightness regulation condition.
4. white balance adjusting method according to claim 2, which is characterized in that judging whether to meet the brightness regulation
Before condition, further includes:
Calculate feux rouges R, green light G and the respective current theoretical brightness value of blue light B.
5. white balance adjusting method according to claim 4, which is characterized in that the calculating feux rouges R, green light G and blue light B
Respective current theoretical brightness value, comprising:
When obtaining the RGB laser light source output white light, the white balance brightness proportion of feux rouges R, green light G and blue light B；
Matched based on the theoretical brightness value for currently needing to export white light and the white balance brightness, calculate feux rouges R, green light G and
The respective current theoretical brightness value of blue light B.
6. white balance adjusting method according to claim 2, which is characterized in that the acquisition feux rouges R, green light G and blue light B
Respective currently practical brightness value, comprising:
Feux rouges R, green light G and the respective currently practical brightness value of blue light B are obtained by optical sensor.
7. white balance adjusting method according to claim 1, which is characterized in that according to the clocked sequential of setting, periodically
The execution white balance adjusting method.
8. white balance adjusting method according to claim 1-7, which is characterized in that the brightness adjusting method packet
It includes:
The brightness of feux rouges R, green light G and blue light B are successively adjusted, so that the brightness of three meets white balance proportion, and is needed with current
The white brightness value to be exported matching.
9. white balance adjusting method according to claim 8, which is characterized in that the brightness tune of feux rouges R, green light G and blue light B
Section method is identical, and when carrying out brightness regulation to any color of light, which includes:
Judge whether the currently practical brightness value of the color of light is equal to current theoretical brightness value；
If so, completing the brightness regulation process of the color of light；
If not, judging whether the currently practical brightness value of the color of light is less than its current theoretical brightness value；
If not, the brightness for reducing the color of light completes the brightness regulation process of the color of light to its current theoretical brightness value；
If so, judge whether can be by the brightness of the color of light to increasing to its current theoretical brightness value；
If so, the brightness of the color of light is maintained to be in its current theoretical brightness value, the brightness regulation process of the color of light is completed；
If not, the maximum brightness value of white balance brightness proportion and the color of light based on feux rouges R, green light G and blue light B, meter
Calculate the current theoretical brightness value after feux rouges R, green light G and blue light B are respectively proofreaded.
10. a kind of white balance adjusting system of RGB laser light source, which is characterized in that the white balance adjusting system includes:
Optical sensor, the optical sensor is for detecting feux rouges R, green light G and the respective currently practical brightness value of blue light B；
Control circuit, the control circuit is for executing such as the described in any item white balance adjusting methods of claim 1-9.
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