CN105632386B - Laser projection show in color temperature adjusting method and device - Google Patents
Laser projection show in color temperature adjusting method and device Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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Abstract
The present invention provide a kind of laser projection show in color temperature adjusting method and device.The above method includes: the real-time intensity value for obtaining the m kind primary lights of laser light source transmitting, and the m is the positive integer more than or equal to 1；Determine that the strength retrogression of i-th kind of primary lights leads according to the raw intensity values of the real-time intensity value of i-th kind of primary lights and i-th kind of primary lights, wherein the i is more than or equal to 1 and is less than or equal to the positive integer of m；The grayscale value of the corresponding color component of every kind of primary lights in each pixel of adjustment image to be displayed is led according to the strength retrogression of i-th kind of primary lights；The image to be displayed is shown according to the grayscale value of the corresponding color component of every kind of primary lights in each pixel of the image to be displayed adjusted.Wherein, according to the grayscale value of the corresponding color component of every kind of primary lights in each pixel of the decaying adjustment image to be displayed of light source, so as to effectively adjust colour temperature, and the purpose of Showing Effectiveness On Screen is improved.
Description
Technical field
The present invention relates to display technology more particularly to a kind of laser projection show in color temperature adjusting method and device.
Background technique
With the continuous improvement of science and technology, since laser projection shows that opposite conventional projection shows there is high brightness, height
Colour gamut etc. preferably image quality expressive force and be widely used, Color Laser Projection Technology be by laser light source light beam carry out
Signal modulation, and then show in laser projection screen a kind of technology of picture.
Laser is the basic luminescent device of laser light source, but laser will receive temperature, dust etc. in use
The influence of environmental factor, in fact it could happen that the case where brightness decay, due to different base colors brightness in laser light source the rate of decay not
Together, the brightness ratio of the image shown on laser projection screen can be made to lack of proper care, so as to cause the color temperature shift of image, so that
The image of display is excessively bright or colour cast.
It in the prior art, is by adjusting the driving current of laser to achieve the purpose that adjust color temp offset, example
Such as: improving the driving current of laser, and laser can be made to be chronically at full load condition using the above method, to can drop
The service life of low laser.
Summary of the invention
The embodiment of the present invention provide a kind of laser projection show in color temperature adjusting method and device, to overcome the prior art
It is middle that laser is needed to work under different driving currents, it is caused reduce laser service life the problem of.
First aspect present invention provide a kind of laser projection show in color temperature adjusting method, the method is applied to laser
Projection, which comprises
The real-time intensity value of the m kind primary lights of laser light source transmitting is obtained, the m is the positive integer more than or equal to 1；
Described i-th kind is determined according to the raw intensity values of the real-time intensity value of i-th kind of primary lights and i-th kind of primary lights
The strength retrogression of primary lights leads, wherein the i is more than or equal to 1 and is less than or equal to the positive integer of m；
Every kind of primary lights pair in each pixel of adjustment image to be displayed are led according to the strength retrogression of i-th kind of primary lights
The grayscale value for the color component answered；
According to the grayscale of the corresponding color component of every kind of primary lights in each pixel of the image to be displayed adjusted
Value shows the image to be displayed.
Second aspect of the present invention provide a kind of laser projection show in color temperature regulator, described device is applied to laser
Projection, described device include:
Module is obtained, the real-time intensity value of the m kind primary lights for obtaining laser light source transmitting, the m is more than or equal to 1
Positive integer；
Determining module, for according to the real-time intensity value of i-th kind of primary lights and the raw intensity values of i-th kind of primary lights
Determine that the strength retrogression of i-th kind of primary lights leads, wherein the i is the positive integer more than or equal to 1 and less than or equal to m；
Module is adjusted, for leading each pixel of adjustment image to be displayed according to the strength retrogression of i-th kind of primary lights
In the corresponding color component of every kind of primary lights grayscale value；
Display module, for the corresponding face of every kind of primary lights in each pixel according to the image to be displayed adjusted
The grayscale value of colouring component shows the image to be displayed.
In the present invention, the real-time intensity value of the m kind primary lights of laser light source transmitting is obtained, the m is just more than or equal to 1
Integer；I-th kind of base is determined according to the raw intensity values of the real-time intensity value of i-th kind of primary lights and i-th kind of primary lights
The strength retrogression of coloured light leads, wherein the i is the positive integer more than or equal to 1 and less than or equal to m；According to i-th kind of primary lights
Strength retrogression lead adjustment image to be displayed each pixel in the corresponding color component of every kind of primary lights grayscale value；According to tune
The grayscale value of the corresponding color component of every kind of primary lights shows described to aobvious in each pixel of the image to be displayed after whole
Diagram picture.Wherein, according to the corresponding color component of every kind of primary lights in each pixel of the decaying adjustment image to be displayed of light source
Grayscale value, so as to effectively adjust colour temperature, and improve the purpose of Showing Effectiveness On Screen.
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 this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 show the structural schematic diagram of laser projection system in the prior art；
Fig. 2 show the embodiment of the present invention one offer laser projection show in color temperature adjusting method flow chart；
Fig. 3 show a kind of flow chart of concrete methods of realizing of the step 203 in Fig. 2；
Fig. 4 show the schematic diagram of the various grayscale values of red color primary lights；
Fig. 5 show laser projection provided by Embodiment 2 of the present invention show in color temperature regulator structural schematic diagram.
Specific embodiment
Fig. 1 show the structural schematic diagram of laser projection system in the prior art, please refers to Fig. 1, laser projection system
In include laser 101, ray machine 102, fluorescent wheel 103, Digital Micromirror Device (Digitalmicro-mirror device, letter
Referred to as: DMD) 104, digital light processing (Digital Light Processing, referred to as are as follows: DLP) unit 105, projection lens
106 and laser projection screen 107, the light beam that laser 101 emits reaches fluorescent wheel 103 by ray machine 102, passes through fluorescent wheel
103 obtain three kinds of primary lights, and then, DMD103 receives three kinds of primary lights that fluorescent wheel 103 emits, and is treated according to DLP105 aobvious
The processing result characteristic value of each pixel (such as in image to be displayed) of diagram picture, to each reflecting mirror inside DMD103 into
Row control carries out postrotational each reflecting mirror for light beam of light source and reflexes to throwing so that each reflecting mirror rotates different angles
Video is presented in the light beam projecting received to laser projection screen 106 by shadow camera lens, projection lens on laser projection screen
The corresponding image of signal.
In the system shown in figure 1, laser 101 will receive the shadow of the environmental factors such as temperature, dust in use
It rings, in fact it could happen that the case where brightness decay, since the rate of decay of different base colors brightness in light source is different, can to throw in laser
The brightness ratio of the image shown on shadow screen 107 is lacked of proper care, so as to cause the color temperature shift of image, so that the image of display is excessively bright
Or colour cast.
And it is in the prior art the mesh by adjusting the driving current of laser 101 to reach adjustment color temp offset
, such as: the driving current of laser 101 is improved, and laser 101 can be made to be chronically at shape at full capacity using the above method
State, so that the service life of laser 101 can be reduced.
Inventor has found under study for action, laser projection show in screen intensity and light-source brightness and image to be displayed pixel
In the relationship of grayscale value of the corresponding color component of i-th kind of primary lights can be expressed as Si=Li*Ai, wherein SiIt is bright for screen
Degree, LiFor light-source brightness (beam brightness of light source transmitting), AiFor the corresponding face of i-th kind of primary lights in the pixel of image to be displayed
The grayscale value of colouring component.Through the relationship it is found that in the case where back light brightness reduces, by improving image to be displayed
The grayscale value of the corresponding color component of i-th kind of primary lights can achieve the purpose for maintaining screen intensity in pixel, thus effectively
Color temperature shift is avoided, and then promotes Showing Effectiveness On Screen, without changing the driving current of laser 101.
The present invention is the grayscale value by adjusting the corresponding color component of various primary lights in the pixel of image to be displayed
Showing Effectiveness On Screen is improved to achieve the purpose that adjust colour temperature.
On the basis of above-mentioned Fig. 1, the present invention increases one for obtaining light between fluorescent wheel 103 and DMD104
Then the sensor of intensity value goes each color in adjustment image to be displayed in each pixel according to the intensity value of the light of acquisition
The grayscale value of component finally shows image to be displayed according to grayscale value adjusted on laser projection screen, keeps away to reach
Exempt from color temperature shift, and then promotes Showing Effectiveness On Screen.
Technical solution of the present invention is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in certain embodiments.
Embodiment one
In embodiment, the first light is the primary lights of red color, and second of light is primary lights, the third light of green color
For the primary lights of blue color.
Fig. 2 show the embodiment of the present invention one offer laser projection show in color temperature adjusting method flow chart, such as
Shown in Fig. 2, the method for the present embodiment is applied to laser projection, and the method for the present embodiment may include:
Step 201, the real-time intensity value for obtaining the m kind primary lights that laser light source emits, wherein m is just more than or equal to 1
Integer.
Before executing this step, the raw intensity values of i-th kind of primary lights, i-th then will acquire can also be first obtained
The raw intensity values of kind primary lights are stored in advance.
The green strength that sensor obtains i-th kind of primary lights of light source transmitting can be used in above-mentioned steps.
When obtaining the green strength of i-th kind of primary lights of light source transmitting using sensor, sensor can be mounted on light
In the luminous optical path in source.Once the driving current of light source will be a definite value specifically, system design is completed, when confirmation passes
After sensor installation is correct, R information is obtained by sensor, G information and B information, above-mentioned R information represent red color primary colours in optical path
The intensity value of light, G information represent the intensity value of green color primary lights in optical path, and B information represents blue color primaries light in optical path
Intensity value.
Further, the raw intensity values that i-th kind of primary lights is obtained in this step specifically include: in the n-th preset time period
Interior the first intensity value that i-th kind of primary lights is obtained at interval of the first preset time, to obtain described in n-th preset time period
When the time span of corresponding multiple first intensity values of i-th kind of primary lights, n-th preset time period is default greater than described first
Between time span；Obtain the average value of corresponding multiple first intensity values of i-th kind of primary lights in the n-th preset time period；
Each institute in n preset time period is obtained according to the corresponding average value of n-th preset time period each in n preset time period
The average value of the corresponding average value of the n-th preset time period is stated, to obtain the raw intensity values of i-th kind of primary lights；Wherein, institute
Stating n is the positive integer more than or equal to 1；And when the n is positive integer greater than 1, have in the two neighboring period overlapping when
Between section.
The raw intensity values of i-th kind of primary lights of acquisition are illustrated how with specific example below:
By taking red color primary lights as an example, when n is 1, the n-th preset time period is the 1st preset time period, the 1st it is default when
Between section be 20 seconds, the first preset time is 2 seconds, that is, sensor is in 20 seconds, obtains red color primary colours respectively at interval of 2 seconds
First intensity value of light, the first intensity value of the available 10 red color primary lights of sensor, respectively R1′,…,R1′0, into
And find out the raw intensity values of red color primary lights
Continue by taking red color primary lights as an example, when n is 3, the 1st preset time period is 1 second to 20 seconds, the 2nd preset time
Section is 5 seconds to 25 seconds, and the 3rd preset time period is 10 seconds to 30 seconds, and the first preset time is 2 seconds, and sensor is in the 1st preset time
In section, the first intensity value of red color primary lights, the available 10 red color primary lights of sensor were obtained respectively at interval of 2 seconds
The first intensity value, respectively R1′,…,R1′0, and then find out the first intensity of the red color primary lights in the 1st preset time period
The average value of valueIn the 2nd preset time period, the first intensity of red color primary lights was obtained respectively at interval of 2 seconds
Value, the first intensity value of the available 10 red color primary lights of sensor, respectively R "1..., R "10, and then find out the 2nd
The average value of first intensity value of red color primary lights in preset time periodIn the 3rd preset time period, every
Obtained the first intensity value of red color primary lights, the last the first of the available 10 red color primary lights of sensor respectively every 2 seconds
Angle value, respectively R " '1..., R1″0', and then find out the flat of in the 2nd preset time period the first intensity value of red color primary lights
Mean valueAnd then obtain the raw intensity values of red color primary lights
In the achievable mode of another of the invention, the raw intensity values of above-mentioned i-th kind of primary colours primary lights of acquisition
Implementation can be with are as follows: continues by taking red color primary lights as an example, when n is 3, the 1st preset time period is 1 second to 20 seconds, and the 2nd
Preset time period is 10 seconds to 30 seconds, and the 3rd preset time period is 20 seconds to 40 seconds, and the first preset time is 2 seconds, and sensor is the
In 1 preset time period, the first intensity value of red color primary lights was obtained respectively at interval of 2 seconds, sensor available 10 red
First intensity value of color primaries light, respectively R1′,…,R1′0, and then find out the red color primary lights in the 1st preset time period
The first intensity value average valueThen, sensor continues to obtain at interval of 2 seconds in the 21st second to the 30th second
First intensity value R of red color primary lights1′1,…,R1′5, at this point, in conjunction with the red color primary lights obtained in the 1st period
First intensity value can obtain the average value of the first intensity value of red color primary lights in the 2nd periodThen, it senses
Device continues the first intensity value R that red color primary lights were obtained at interval of 2 seconds in the 31st second to the 40th second1′6,…,R′20, this
When, in conjunction with the first intensity value of the red color primary lights obtained in the 1st period and the 2nd period, can obtain red in the 3rd period
The average value of first intensity value of color primaries lightAnd then obtain the raw intensity values of red color primary lights
When system after a period of use, the brightness decay of light source can be led to due to extraneous factor, at this point, also needing to obtain light
The Real-time intensity of the m kind primary lights of source transmitting, specifically, obtaining i-th at interval of the second preset time in f preset time period
Second intensity value of kind primary lights, to obtain corresponding multiple the last the second of i-th kind of primary lights described in the f preset time period
Angle value, the time span of the f preset time period are greater than the time span of second preset time；Obtain f it is default when
Between in section corresponding multiple second intensity values of i-th kind of primary lights average value；According to each described in f preset time period
The corresponding average value of f preset time period obtains the corresponding average value of each f preset time period in f preset time period
Average value, to obtain the real-time intensity value of i-th kind of primary lights；Wherein, the f is the positive integer more than or equal to 1；And
When the f is the positive integer greater than 1, there is the time of overlapping in the two neighboring period.
The Real-time intensity for obtaining m kind primary lights is similar with the raw intensity values of above-mentioned acquisition m kind primary lights, is specifically detailed in
Embodiment description is stated, details are not described herein again.
Step 202 determines i-th kind according to the real-time intensity value of i-th kind of primary lights and the raw intensity values of i-th kind of primary lights
The strength retrogression of primary lights leads, wherein i is the positive integer more than or equal to 1 and less than or equal to m.
Specifically, according toDetermine the change rate of strength of i-th kind of primary lights, wherein αiFor i-th kind of primary lights
Change rate of strength, C 'iFor the raw intensity values of i-th kind of primary lights, Δ CiFor the raw intensity values and i-th kind of base of i-th kind of primary lights
The difference of the real-time intensity value of coloured light.
Step 203: every kind of primary colours in each pixel of adjustment image to be displayed are led according to the strength retrogression of i-th kind of primary lights
The grayscale value of the corresponding color component of light.
The step 203 of the present embodiment can be realized by a variety of feasible modes, in the following, by Fig. 3 to the one of step 203
The feasible implementation of kind is described in detail, and Fig. 3 show a kind of process of concrete methods of realizing of the step 203 in Fig. 2
Figure, as shown in Figure 3:
Step 2031: i-th kind of primary lights in the pixel of image to be displayed are determined according to the change rate of strength of i-th kind of primary lights
The theoretical maximum grayscale value of corresponding color component.
Step 2032: the corresponding color component of i-th kind of primary lights according to the pixel of the image to be displayed is most
Broad theory grayscale value determines gray scale compensation value, wherein gray scale compensation value is the corresponding color point of every kind of primary lights in m kind primary lights
Maximum value in the theoretical maximum grayscale value of amount；
Step 2033: the corresponding color of every kind of primary lights in each pixel of image to be displayed is adjusted according to gray scale compensation value
The grayscale value of component.
Specifically, a kind of achievable mode of above-mentioned steps 2031 are as follows:
According toDetermine the theoretical maximum of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed
Grayscale value, wherein the Ai′maxThe maximum of the corresponding color component of i-th kind of primary lights described in pixel for image to be displayed
Theoretical grayscale value, the AbThe maximum preset of the corresponding color component of i-th kind of primary lights described in pixel for image to be displayed
Grayscale value, the αiFor the change rate of strength of i-th kind of primary lights.
Wherein, AbIt is related with front end signal, such as: when front end signal is the signal of 8bit, AbIt is 255.
Such as: the theoretical maximum grayscale value of the corresponding color component of beauty's coloured light is in the pixel of image to be displayed at this time
A’1max=255/ α1；Equally acquire the theoretical maximum grayscale value of the corresponding color component of green color light in the pixel of image to be displayed
For A '2max=255/ α2, the theoretical maximum grayscale value of the corresponding color component of blue color of light is in the pixel of image to be displayed
A’3max=255/ α3, and then find out max (A1′max, A '2max, A '3max), it is assumed that A1′maxFor maximum value, it is determined that A1′maxFor ash
Rank offset.
Specifically, a kind of achievable mode of above-mentioned steps 2033 are as follows:
Firstly, according toDetermine the theory of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed
Show grayscale value, Ai' it is that the theoretical of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed shows grayscale value, Ai
For the original display grayscale value of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed, αiFor i-th kind of primary lights
The change rate of strength of corresponding color component；
Then, according toDetermine the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed
Actual displayed grayscale value, wherein AiTIt is aobvious for the reality of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed
Show grayscale value, Ai' it is that the theoretical of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed shows grayscale value,
Ai′maxFor gray scale compensation value, AbFor the maximum preset ash of the corresponding color component of i-th kind of primary lights in the pixel of image to be displayed
Rank value.
Continue according to above-mentioned example, at this time calculated gray scale compensation value A1′maxIt will appear spilling, as adjusted in Fig. 4
This curve, grayscale value reach 400 afterwards, wherein Fig. 4 show the schematic diagram of the various grayscale values of red color primary lights.
According toThe corresponding color component of red color primary lights in the pixel of image to be displayed can be found out
Actual displayed grayscale valueA1' divide for the corresponding color of red color primary lights in the pixel of image to be displayed
The theoretical of amount shows grayscale value, in the pixel of image to be displayed after the grayscale value adjustment of the corresponding color component of red color primary lights
Curve correspond to the curve after normalization as shown in Figure 4, as shown in Figure 4, by the corresponding color component of red color primary lights
Grayscale value has been modulated to 255 from 400, to ensure that the normal display of beauty's colouring component in pixel.
It similarly, can basisFind out the corresponding color component of green color primary lights in the pixel of image to be displayed
Actual displayed grayscale valueIt can basisFind out blue color base in the pixel of image to be displayed
The actual displayed grayscale value of the corresponding color component of coloured light
Step 204, according to the corresponding color component of every kind of primary lights in each pixel of image to be displayed adjusted
Grayscale value shows image to be displayed.
According to the actual displayed grayscale value of the corresponding color component of every kind of primary lights in the pixel of image to be displayed in screen
Upper display image to be displayed.
Further, when the Real-time intensity for i-th kind of primary lights for obtaining light source transmitting using sensor, or, obtaining light source
The green strength of i-th kind of primary lights of transmitting, it is necessary to guarantee the accuracy for the intensity value that sensor is got, namely must protect
Sensor is mounted in the light-path of color converting device by the correctness of card sensor installation in the present invention, avoids sensing
Device be saturated since light is too strong, so that the value inaccuracy read, it is therefore necessary to the effective shading of sensor progress, such as can be with
It is mounted on the corresponding shell of optical path by the way that anti-dazzling screen is arranged in front of sensor, or by sensor, by opening up light hole
Receive the primary lights of less area.
It is introduced below how to judge whether sensor is installed correctly:
I-th kind of primary lights is determined according to the raw intensity values of the real-time intensity value of i-th kind of primary lights and i-th kind of primary lights
Change rate of strength specifically includes: judging whether the real-time intensity value of the m kind primary lights of light source transmitting is all larger than preset value；If no
That the real-time intensity value of m kind primary lights of light source transmitting is all larger than preset value, then according to the real-time intensity value of i-th kind of primary lights with
The raw intensity values of i-th kind of primary lights determine the change rate of strength of i-th kind of primary lights.
Wherein, preset value is the maximum value of the intensity value of primary lights.
That is, when the intensity value of the red color primary lights of sensor acquisition is the maximum of the intensity value of red color primary lights
Value, when sensor obtain green color primary lights intensity value be green color primary lights intensity value maximum value, work as sensing
The intensity value for the blue color primaries light that device obtains is the maximum value of the intensity value of blue color primaries light, then can determine acquisition at this time
The intensity value of the every kind of primary lights arrived is incorrect, that is, the installation of sensor is incorrect.
The driving current of light source is kept not change in the present invention, then every kind of face in the pixel by changing image to be displayed
The grayscale value of colouring component, thus by the attenuation losses for compensating the change of grayscale value actual light source illumination, and then reach tune
Save the purpose of colour temperature.
The embodiment of the present invention provide a kind of laser projection show in color temperature adjusting method, comprising: obtain laser light source hair
The real-time intensity value for the m kind primary lights penetrated, the m are the positive integer more than or equal to 1；According to the Real-time intensity of i-th kind of primary lights
Value and the raw intensity values of i-th kind of primary lights determine that the strength retrogression of i-th kind of primary lights leads, wherein the i is greater than
Positive integer equal to 1 and less than or equal to m；Each of adjustment image to be displayed is led according to the strength retrogression of i-th kind of primary lights
The grayscale value of the corresponding color component of every kind of primary lights in pixel；According in each pixel of the image to be displayed adjusted
The grayscale value of the corresponding color component of every kind of primary lights shows the image to be displayed.Wherein, according to the decaying of light source adjust to
Show the grayscale value of the corresponding color component of every kind of primary lights in each pixel of image, so as to effectively adjust colour temperature,
And improve the purpose of Showing Effectiveness On Screen.
Embodiment two
Fig. 5 show laser projection provided in an embodiment of the present invention show in color temperature regulator structural schematic diagram, institute
Device is stated applied to laser projection, as shown in figure 5, described device includes:
Obtain module 11, for obtain laser light source transmitting m kind primary lights real-time intensity value, the m be greater than etc.
In 1 positive integer；
Determining module 12, for according to the real-time intensity value of i-th kind of primary lights and the green strength of i-th kind of primary lights
Value determines that the strength retrogression of i-th kind of primary lights leads, wherein the i is the positive integer more than or equal to 1 and less than or equal to m；
Module 13 is adjusted, for leading each picture of adjustment image to be displayed according to the strength retrogression of i-th kind of primary lights
The grayscale value of the corresponding color component of every kind of primary lights in element；
Display module 14, it is corresponding for every kind of primary lights in each pixel according to the image to be displayed adjusted
The grayscale value of color component shows the image to be displayed.
Optionally, the adjustment module 13 is specifically used for:
I-th kind of base described in the pixel of the image to be displayed is determined according to the change rate of strength of i-th kind of primary lights
The theoretical maximum grayscale value of the corresponding color component of coloured light；
The theoretical maximum grayscale of the corresponding color component of i-th kind of primary lights according to the pixel of the image to be displayed
Be worth determine gray scale compensation value, the gray scale compensation value be the m kind primary lights in the corresponding color component of every kind of primary lights most
Maximum value in broad theory grayscale value；
The corresponding color component of every kind of primary lights in each pixel of image to be displayed is adjusted according to the gray scale compensation value
Grayscale value.
Optionally, the determining module 12 is specifically used for:
According toDetermine the change rate of strength of i-th kind of primary lights, wherein the αiFor i-th kind of primary colours
The change rate of strength of light, the C 'iFor the raw intensity values of i-th kind of primary lights, the Δ CiFor i-th kind of primary lights
Raw intensity values and i-th kind of primary lights real-time intensity value difference.
Optionally, the institute in the pixel for determining the image to be displayed according to the change rate of strength of i-th kind of primary lights
The aspect of the theoretical maximum grayscale value of the corresponding color component of i-th kind of primary lights is stated, the determining module 12 is specifically used for:
According toDetermine the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
Theoretical maximum grayscale value, wherein the Ai′maxThe corresponding color point of i-th kind of primary lights described in pixel for image to be displayed
The theoretical maximum grayscale value of amount, the AbThe corresponding color component of i-th kind of primary lights described in pixel for image to be displayed
Maximum preset grayscale value, the αiFor the change rate of strength of i-th kind of primary lights.
Optionally, the adjustment module 13 is specifically used for:
According toDetermine the reason of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
By display grayscale value, the AiThe reason of the corresponding color component of i-th kind of primary lights described in the ' pixel for the image to be displayed
By display grayscale value, the AiThe original of the corresponding color component of i-th kind of primary lights described in pixel for the image to be displayed
Begin display grayscale value, the αiFor the change rate of strength of the corresponding color component of i-th kind of primary lights；
According toDetermine the corresponding color point of i-th kind of primary lights described in the pixel of the image to be displayed
The actual displayed grayscale value of amount, wherein the AiTThe corresponding face of i-th kind of primary lights described in pixel for the image to be displayed
The actual displayed grayscale value of colouring component, the AiThe corresponding face of i-th kind of primary lights described in the ' pixel for the image to be displayed
The theoretical display grayscale value of colouring component, the Ai′maxFor the gray scale compensation value, the AbFor the pixel of the image to be displayed
Described in the corresponding color component of i-th kind of primary lights maximum preset grayscale value.
Optionally, the determining module 12 is specifically used for:
Judge whether the real-time intensity value of the m kind primary lights of the light source transmitting is all larger than preset value；
If not the real-time intensity value of the m kind primary lights of the light source transmitting is all larger than preset value, then according to described i-th kind
The raw intensity values of the real-time intensity value of primary lights and i-th kind of primary lights determine the Strength Changes of i-th kind of primary lights
Rate.
Optionally, the acquisition module 11, is specifically used for:
The first intensity value of i-th kind of primary lights is obtained, at interval of the first preset time in the n-th preset time period to obtain
Corresponding multiple first intensity values of i-th kind of primary lights described in n-th preset time period, n-th preset time period when
Between length be greater than first preset time time span；
Obtain the average value of corresponding multiple first intensity values of i-th kind of primary lights in the n-th preset time period；
According to n preset time period of each n-th preset time period corresponding average value acquisition in n preset time period
In the corresponding average value of each n-th preset time period average value, to obtain the Real-time intensity of i-th kind of primary lights
Value；
Wherein, the n is the positive integer more than or equal to 1；And when the n is the positive integer greater than 1, when two neighboring
Between have period of overlapping in section.
Optionally, the acquisition module 11 is also used to: in the determining module 12 according to the real-time of i-th kind of primary lights
Before the raw intensity values of intensity value and i-th kind of primary lights determine that the strength retrogression of i-th kind of primary lights leads, institute is obtained
State the raw intensity values of i-th kind of primary lights.
Optionally, in terms of the raw intensity values for obtaining i-th kind of primary lights, the acquisition module 11 is also used to:
The second intensity value of i-th kind of primary lights is obtained, at interval of the second preset time in f preset time period to obtain
Corresponding multiple second intensity values of i-th kind of primary lights described in the f preset time period, the f preset time period when
Between length be greater than second preset time time span；
Obtain the average value of corresponding multiple second intensity values of i-th kind of primary lights in f preset time period；
According to f preset time period of each f preset time period corresponding average value acquisition in f preset time period
In the corresponding average value of each f preset time period average value, to obtain the green strength of i-th kind of primary lights
Value；
Wherein, the f is the positive integer more than or equal to 1；And when the f is the positive integer greater than 1, when two neighboring
Between have time of overlapping in section.
Device shown in the embodiment of the present invention can execute skill shown in the corresponding either method embodiment of above-mentioned Fig. 2-Fig. 5
Art scheme, realization principle and beneficial effect are similar, are no longer repeated herein.
And above-mentioned apparatus can be specially laser projection device, such as laser-projector, laser television passes through application
Above-mentioned color temperature adjusting method keeps the driving current of light source not change, every kind of face in the pixel by changing image to be displayed
The grayscale value of colouring component to compensate the attenuation losses of actual light source illumination, and then achievees the purpose that adjust colour temperature, improves projection
The display effect of picture.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned includes: read-only memory
(Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk
Etc. the various media that can store program code.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (18)
1. a kind of laser projection show in color temperature adjusting method, which is characterized in that the method be applied to laser projection, it is described
Method includes:
The real-time intensity value of the m kind primary lights of laser light source transmitting is obtained, the m is the positive integer more than or equal to 1；
I-th kind of primary colours are determined according to the raw intensity values of the real-time intensity value of i-th kind of primary lights and i-th kind of primary lights
The strength retrogression of light leads, wherein the i is the positive integer more than or equal to 1 and less than or equal to m；
It is corresponding that every kind of primary lights in each pixel of adjustment image to be displayed are led according to the strength retrogression of i-th kind of primary lights
The grayscale value of color component；
It is aobvious according to the grayscale value of the corresponding color component of every kind of primary lights in each pixel of the image to be displayed adjusted
Show the image to be displayed.
2. the method according to claim 1, wherein the strength retrogression according to i-th kind of primary lights leads
Adjust the grayscale value of the corresponding color component of every kind of primary lights in each pixel of image to be displayed, comprising:
It is led according to the strength retrogression of i-th kind of primary lights and determines i-th kind of primary lights described in the pixel of the image to be displayed
The corresponding theoretical maximum grayscale value of corresponding color component；
The theoretical maximum grayscale value of the corresponding color component of i-th kind of primary lights according to the pixel of the image to be displayed is true
Determine gray scale compensation value, the gray scale compensation value is that the corresponding color component of every kind of primary lights is corresponding most in the m kind primary lights
Maximum value in broad theory grayscale value；
The ash of the corresponding color component of every kind of primary lights in each pixel of image to be displayed is adjusted according to the gray scale compensation value
Rank value.
3. according to the method described in claim 2, it is characterized in that, the real-time intensity value according to i-th kind of primary lights
Determining that the strength retrogression of i-th kind of primary lights leads with the raw intensity values of i-th kind of primary lights includes:
According toDetermine that the strength retrogression of i-th kind of primary lights leads, wherein the αiFor i-th kind of primary lights
Strength retrogression leads, the C 'iFor the raw intensity values of i-th kind of primary lights, the Δ CiFor the original of i-th kind of primary lights
The difference of the real-time intensity value of beginning intensity value and i-th kind of primary lights.
4. according to the method described in claim 3, it is characterized in that, the strength retrogression according to i-th kind of primary lights leads
Determine the corresponding theoretical maximum grayscale value of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed,
Include:
According toDetermine the maximum of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
Theoretical grayscale value, wherein the A 'imaxThe corresponding color component pair of i-th kind of primary lights described in pixel for image to be displayed
The theoretical maximum grayscale value answered, the AbThe corresponding color component pair of i-th kind of primary lights described in pixel for image to be displayed
The maximum preset grayscale value answered, the αiStrength retrogression for i-th kind of primary lights leads.
5. according to the method described in claim 4, it is characterized in that, described adjust image to be displayed according to the gray scale compensation value
Each pixel in the corresponding color component of every kind of primary lights grayscale value, comprising:
According toDetermine the corresponding reason of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
By display grayscale value, the A 'iThe corresponding color component of i-th kind of primary lights described in pixel for the image to be displayed is corresponding
Theoretical display grayscale value, the AiThe corresponding color component of i-th kind of primary lights described in pixel for the image to be displayed
Corresponding original display grayscale value, the αiStrength retrogression for the corresponding color component of i-th kind of primary lights leads；
According toDetermine the corresponding color component pair of i-th kind of primary lights described in the pixel of the image to be displayed
The actual displayed grayscale value answered, wherein the AiTThe corresponding face of i-th kind of primary lights described in pixel for the image to be displayed
The corresponding actual displayed grayscale value of colouring component, the A 'iI-th kind of primary lights described in pixel for the image to be displayed are corresponding
The corresponding theoretical display grayscale value of color component, the A 'imaxFor the gray scale compensation value, the AbFor the figure to be shown
The maximum preset grayscale value of the corresponding color component of i-th kind of primary lights described in the pixel of picture.
6. according to the described in any item methods of claim 2-5, which is characterized in that the reality according to i-th kind of primary lights
When intensity value and the raw intensity values of i-th kind of primary lights determine that the strength retrogression of i-th kind of primary lights leads, comprising:
Judge whether the real-time intensity value of the m kind primary lights of the light source transmitting is all larger than preset value；
If not the real-time intensity value of the m kind primary lights of the light source transmitting is all larger than preset value, then according to i-th kind of primary colours
The raw intensity values of the real-time intensity value of light and i-th kind of primary lights determine that the strength retrogression of i-th kind of primary lights leads.
7. according to the method described in claim 6, it is characterized in that, the m kind primary lights for obtaining light source transmitting it is real-time strong
Angle value, comprising:
The first intensity value of i-th kind of primary lights is obtained at interval of the first preset time in the n-th preset time period, it is described to obtain
Corresponding multiple first intensity values of i-th kind of primary lights described in n-th preset time period, the time of n-th preset time period are long
Degree is greater than the time span of first preset time；
Obtain the average value of corresponding multiple first intensity values of i-th kind of primary lights in n-th preset time period；
According to each n-th preset time period corresponding average value acquisition n preset time period in n preset time period
In the corresponding average value of each n-th preset time period average value, to obtain the Real-time intensity of i-th kind of primary lights
Value；
Wherein, the n is the positive integer more than or equal to 1；And when the n is the positive integer greater than 1, the two neighboring period
In have period of overlapping.
8. method according to claim 1-5, which is characterized in that described according to the real-time strong of i-th kind of primary lights
Before angle value and the raw intensity values of i-th kind of primary lights determine that the strength retrogression of i-th kind of primary lights leads, further includes:
Obtain the raw intensity values of i-th kind of primary lights.
9. according to the method described in claim 8, it is characterized in that, the raw intensity values for obtaining i-th kind of primary lights,
Include:
The second intensity value of i-th kind of primary lights is obtained at interval of the second preset time in f preset time period, it is described to obtain
Corresponding multiple second intensity values of i-th kind of primary lights described in f preset time period, the time of the f preset time period are long
Degree is greater than the time span of second preset time；
Obtain the average value of corresponding multiple second intensity values of i-th kind of primary lights in the f preset time period；
According to each f preset time period corresponding average value acquisition f preset time period in f preset time period
In the corresponding average value of each f preset time period average value, to obtain the green strength of i-th kind of primary lights
Value；
Wherein, the f is the positive integer more than or equal to 1；And when the f is the positive integer greater than 1, the two neighboring period
In have time of overlapping.
10. a kind of laser projection show in color temperature regulator, which is characterized in that described device be applied to laser projection, institute
Stating device includes:
Module is obtained, the real-time intensity value of the m kind primary lights for obtaining laser light source transmitting, the m is just more than or equal to 1
Integer；
Determining module, for being determined according to the real-time intensity value of i-th kind of primary lights and the raw intensity values of i-th kind of primary lights
The strength retrogression of i-th kind of primary lights leads, wherein the i is the positive integer more than or equal to 1 and less than or equal to m；
Module is adjusted, it is every in each pixel for leading adjustment image to be displayed according to the strength retrogression of i-th kind of primary lights
The grayscale value of the corresponding color component of kind primary lights；
Display module, for the corresponding color point of every kind of primary lights in each pixel according to the image to be displayed adjusted
The grayscale value of amount shows the image to be displayed.
11. device according to claim 10, which is characterized in that the adjustment module is specifically used for:
It is led according to the strength retrogression of i-th kind of primary lights and determines i-th kind of primary lights described in the pixel of the image to be displayed
The theoretical maximum grayscale value of corresponding color component；
The theoretical maximum grayscale value of the corresponding color component of i-th kind of primary lights according to the pixel of the image to be displayed is true
Determine gray scale compensation value, the gray scale compensation value is the most Dali of the corresponding color component of every kind of primary lights in the m kind primary lights
By the maximum value in grayscale value；
The ash of the corresponding color component of every kind of primary lights in each pixel of image to be displayed is adjusted according to the gray scale compensation value
Rank value.
12. device according to claim 11, which is characterized in that the determining module is specifically used for:
According toDetermine that the strength retrogression of i-th kind of primary lights leads, wherein the αiFor i-th kind of primary lights
Strength retrogression leads, the C 'iFor the raw intensity values of i-th kind of primary lights, the Δ CiFor the original of i-th kind of primary lights
The difference of the real-time intensity value of beginning intensity value and i-th kind of primary lights.
13. device according to claim 12, which is characterized in that led according to the strength retrogression of i-th kind of primary lights
Determine the side of the theoretical maximum grayscale value of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
Face, the determining module are specifically used for:
According toDetermine the maximum of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
Theoretical grayscale value, wherein the A 'imaxThe corresponding color component of i-th kind of primary lights described in pixel for image to be displayed
Theoretical maximum grayscale value, the AbThe maximum of the corresponding color component of i-th kind of primary lights described in pixel for image to be displayed
Preset gray scale value, the αiStrength retrogression for i-th kind of primary lights leads.
14. device according to claim 13, which is characterized in that the adjustment module is specifically used for:
According toDetermine that the theory of the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed is aobvious
Show grayscale value, the A 'iThe theory of the corresponding color component of i-th kind of primary lights described in pixel for the image to be displayed is aobvious
Show grayscale value, the AiThe original of the corresponding color component of i-th kind of primary lights described in pixel for the image to be displayed shows
Show grayscale value, the αiStrength retrogression for the corresponding color component of i-th kind of primary lights leads；
According toDetermine the corresponding color component of i-th kind of primary lights described in the pixel of the image to be displayed
Actual displayed grayscale value, wherein the AiTThe corresponding color point of i-th kind of primary lights described in pixel for the image to be displayed
The actual displayed grayscale value of amount, the A 'iThe corresponding color point of i-th kind of primary lights described in pixel for the image to be displayed
The theoretical display grayscale value of amount, the A 'imaxFor the gray scale compensation value, the AbFor institute in the pixel of the image to be displayed
State the maximum preset grayscale value of the corresponding color component of i-th kind of primary lights.
15. the described in any item devices of 1-14 according to claim 1, which is characterized in that the determining module is specifically used for:
Judge whether the real-time intensity value of the m kind primary lights of the light source transmitting is all larger than preset value；
If not the real-time intensity value of the m kind primary lights of the light source transmitting is all larger than preset value, then according to i-th kind of primary colours
The raw intensity values of the real-time intensity value of light and i-th kind of primary lights determine that the strength retrogression of i-th kind of primary lights leads.
16. device according to claim 15, which is characterized in that the acquisition module is specifically used for:
The first intensity value of i-th kind of primary lights is obtained at interval of the first preset time in the n-th preset time period, it is described to obtain
Corresponding multiple first intensity values of i-th kind of primary lights described in n-th preset time period, the time of n-th preset time period are long
Degree is greater than the time span of first preset time；
Obtain the average value of corresponding multiple first intensity values of i-th kind of primary lights in n-th preset time period；
According to each n-th preset time period corresponding average value acquisition n preset time period in n preset time period
In the corresponding average value of each n-th preset time period average value, to obtain the Real-time intensity of i-th kind of primary lights
Value；
Wherein, the n is the positive integer more than or equal to 1；And when the n is the positive integer greater than 1, the two neighboring period
In have period of overlapping.
17. the described in any item devices of 0-14 according to claim 1, which is characterized in that the acquisition module is also used to: described
Determining module is according to the determination of the raw intensity values of the real-time intensity value of i-th kind of primary lights and i-th kind of primary lights
Before the strength retrogression of i-th kind of primary lights leads, the raw intensity values of i-th kind of primary lights are obtained.
18. device according to claim 17, which is characterized in that in the raw intensity values for obtaining i-th kind of primary lights
Aspect, the acquisition module is also used to:
The second intensity value of i-th kind of primary lights is obtained at interval of the second preset time in f preset time period, it is described to obtain
Corresponding multiple second intensity values of i-th kind of primary lights described in f preset time period, the time of the f preset time period are long
Degree is greater than the time span of second preset time；
Obtain the average value of corresponding multiple second intensity values of i-th kind of primary lights in the f preset time period；
According to each f preset time period corresponding average value acquisition f preset time period in f preset time period
In the corresponding average value of each f preset time period average value, to obtain the green strength of i-th kind of primary lights
Value；
Wherein, the f is the positive integer more than or equal to 1；And when the f is the positive integer greater than 1, the two neighboring period
In have time of overlapping.
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| CN106094405B (en) | 2016-06-03 | 2017-11-21 | 海信集团有限公司 | Projected picture correcting method, device and projector |
| CN105911807B (en) * | 2016-06-03 | 2019-03-22 | 青岛海信电器股份有限公司 | Laser projection method and laser projection |
| CN108737798A (en) * | 2017-04-17 | 2018-11-02 | 深圳市光峰光电技术有限公司 | Optical projection system and projecting method |
| CN109089094B (en) * | 2018-10-16 | 2020-08-04 | 歌尔股份有限公司 | Color shift compensation method and projection device |
| CN111294649B (en) * | 2020-05-13 | 2021-02-26 | 腾讯科技（深圳）有限公司 | Content display method and device based on screen combination, electronic equipment and storage medium |
| CN112506455B (en) * | 2020-11-18 | 2024-10-18 | Oppo广东移动通信有限公司 | Display method and device of screen to be projected, electronic equipment and readable storage medium |
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| CN101282416B (en) * | 2008-01-29 | 2010-04-14 | 青岛海信电器股份有限公司 | Method for displaying projection |
| CN102318338A (en) * | 2008-03-31 | 2012-01-11 | 曼德斯必德技术公司 | Reducing power dissipation in portable LCOS/LCD/DLP projection systems |
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