CN108281107A - It is a kind of display color of image compensation method and splicing display device - Google Patents
It is a kind of display color of image compensation method and splicing display device Download PDFInfo
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- CN108281107A CN108281107A CN201810078783.3A CN201810078783A CN108281107A CN 108281107 A CN108281107 A CN 108281107A CN 201810078783 A CN201810078783 A CN 201810078783A CN 108281107 A CN108281107 A CN 108281107A
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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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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Abstract
The present invention provide it is a kind of display color of image compensation method and splicing display device,The compensation method includes,Before splicing display device shows image,Obtain brightness value of first sub-pix under each grayscale in liquid crystal display panel,And obtain brightness value of second sub-pix under each grayscale in LED display panel,And calculate separately the difference of the brightness value of the brightness value of the first sub-pix and the second sub-pix corresponding with the first sub-pix color under each grayscale,And compensation electric current is obtained according to the difference,To utilize the driving current value of the second sub-pix under compensation each grayscale of current regulation,To during splicing display device shows image,The difference of the color of the image shown by liquid crystal display and the color of the image shown by light emitting diode (LED) display screen can be reduced,And then the color homogeneity of the general image shown by splicing display device can be improved,Avoid the problem that general image generation is isolated.
Description
Technical field
The present invention relates to display technology field, more particularly to the compensation method of a kind of display color of image and tiled display dress
It sets.
Background technology
Splicing display device includes multiple liquid crystal displays (LCD), can make the size of entire splicing display device in this way
It is larger, convenient for meeting the needs of fields such as outdoor display.It can not accomplish to be seamlessly connected between liquid crystal display, liquid crystal display at present
Seam between screen has been decreased to 4mm or so from initial 10mm, but since the seam, corresponding shadow can not be eliminated at all
Ring the display effect of splicing display device.
It is existing by between liquid crystal display be arranged light emitting diode (LED) display screen (LED), utilize liquid crystal display and hair
Optical diode display screen shows display picture jointly, to eliminate the seam problems between liquid crystal display at all.But due to liquid
Crystal display screen is different with the principle of luminosity of light emitting diode (LED) display screen, and liquid crystal display is that passive shine (utilizes backlight module
Shine), and light emitting diode (LED) display screen is actively to shine, the accordingly brightness of liquid crystal display and light-emitting diodes under same grayscale
The brightness of tube display screen has differences, so as to cause color and the light emitting diode (LED) display screen institute of liquid crystal display displayed image
There are larger differences for the color of display image so that the general image that splicing display device is shown there are problems that isolating, and influence to spell
Connect the display effect of display device.
Invention content
The present invention aiming at the above shortcomings existing in the prior art, provides a kind of compensation method and spelling of display color of image
Display device is connect, at least partly to solve the color and hair of liquid crystal display panel displayed image in existing splicing display device
The problem of the differing greatly of color of optical diode display screen displayed image.
To achieve the above object, the present invention provides a kind of compensation method of display color of image, is applied to include liquid crystal
The splicing display device for showing panel and LED display panel, the method includes：
Brightness value of each first sub-pix under each grayscale in the liquid crystal display panel is obtained, and obtains described shine
Brightness value of each second sub-pix under each grayscale in diode display panel；
Calculate separately under each grayscale the brightness value of first sub-pix and corresponding with the first sub-pix color
The difference of the brightness value of second sub-pix, and compensation electric current is obtained according to the difference；
According to it is described compensation each grayscale of current regulation under second sub-pix driving current value so that under each grayscale with
The brightness value of corresponding second sub-pix of first sub-pix color is identical with the brightness value of first sub-pix.
Preferably, the acquisition brightness value of first sub-pix and second sub-pix under each grayscale specifically wraps
It includes：
The brightness value of first sub-pix and second sub-pix under the grayscale of preset quantity is obtained, and is counted respectively
The correspondence of the brightness value of grayscale and first sub-pix and the brightness value of second sub-pix is calculated, and according to described right
It should be related to and calculate first sub-pix and second sub-pix in other grayscale in addition to the grayscale of the preset quantity
Under brightness value, wherein the preset quantity is less than the ash of the liquid crystal display panel or the LED display panel
Rank total quantity.
Preferably, the liquid crystal display panel includes multiple first pixel units, and each first pixel unit includes multiple
One sub-pix, first sub-pix are the first red pixel, the first green pixel or the first blue pixel；
The LED display panel includes multiple second pixel units, and each second pixel unit includes multiple second
Sub-pix, second sub-pix are the second red pixel, the second green pixel or the second blue pixel.
Preferably, the acquisition brightness value of first sub-pix and second sub-pix under each grayscale specifically wraps
It includes：
Acquire respectively the first sub-pix grou under each grayscale by same color in each first pixel unit at
One picture；And acquire under each grayscale by the second sub-pix grou of same color in each second pixel unit at second
Picture；
The luminance mean value of first picture is calculated separately, the luminance mean value of first picture is and first picture
Brightness value of identical first sub-pix of color under each grayscale；And calculate separately the luminance mean value of second picture, institute
The luminance mean value for stating the second picture is brightness value of the second sub-pix identical with second picture color under each grayscale.
Preferably, the acquisition brightness value of first sub-pix and second sub-pix under each grayscale specifically wraps
It includes：
Acquisition is under each grayscale by the blue pixel of the first red pixel, the first green pixel and first in each first pixel unit
The third picture of composition；And it acquires under each grayscale by the second red pixel, the second green pixel in each second pixel unit
With the 4th picture of the second blue pixel composition；
The luminance mean value of the third picture is calculated, the luminance mean value of the third picture is first in the first pixel unit
Brightness value of the blue pixel of red pixel, the first green pixel and first under each grayscale；And the brightness of calculating the 4th picture is equal
The luminance mean value of value, the 4th picture is that the blue pixel of the second red pixel, the second green pixel and second exists in the second pixel unit
Brightness value under each grayscale.
The present invention also provides a kind of splicing display devices, including liquid crystal display panel and LED display panel, also
Including acquiring unit and control unit, the acquiring unit is used for, and is obtained each first sub-pix in the liquid crystal display panel and is existed
Brightness value under each grayscale, and obtain brightness of each second sub-pix under each grayscale in the LED display panel
Value；
Described control unit is used for, calculate separately under each grayscale the brightness value of first sub-pix and with it is described first sub-
The difference of the brightness value of corresponding second sub-pix of pixel color, and compensation electric current is obtained according to the difference, and according to institute
State compensation each grayscale of current regulation under second sub-pix driving current value so that under each grayscale with first sub-pix
The brightness value of corresponding second sub-pix of color is identical with the brightness value of first sub-pix.
Preferably, the acquiring unit is specifically used for, and obtains first sub-pix and second sub-pix default
Brightness value under the grayscale of quantity, and calculate separately the brightness value of grayscale and first sub-pix and second sub-pix
The correspondence of brightness value, and first sub-pix and second sub-pix are calculated except described according to the correspondence
The brightness value under other grayscale except the grayscale of preset quantity, wherein the preset quantity is less than the liquid crystal display panel
Or the grayscale total quantity of the LED display panel.
Preferably, the liquid crystal display panel includes multiple first pixel units, and each first pixel unit includes multiple
One sub-pix, first sub-pix are the first red pixel, the first green pixel or the first blue pixel；
The LED display panel includes multiple second pixel units, and each second pixel unit includes multiple second
Sub-pix, second sub-pix are the second red pixel, the second green pixel or the second blue pixel.
Preferably, the acquiring unit includes collecting unit and processing unit, and the collecting unit is used for, acquires respectively
Under each grayscale by the first sub-pix grou of same color in each first pixel unit at the first picture；And acquisition is each
Under grayscale by the second sub-pix grou of same color in each second pixel unit at the second picture；
The processing unit is used for, and calculates separately the luminance mean value of first picture, and the brightness of first picture is equal
Value is brightness value of the first sub-pix identical with first picture color under each grayscale；And calculate separately described second
The luminance mean value of picture, the luminance mean value of second picture are the second sub-pix identical with second picture color each
Brightness value under grayscale.
Preferably, the acquiring unit includes collecting unit and processing unit, and the collecting unit is used for, and is acquired in each ash
The third picture being made of the blue pixel of the first red pixel, the first green pixel and first in each first pixel unit under rank；With
And it acquires and is made of the blue pixel of the second red pixel in each second pixel unit, the second green pixel and second under each grayscale
4th picture；
The processing unit is used for, and calculates the luminance mean value of the third picture, and the luminance mean value of the third picture is
Brightness value of the blue pixel of first red pixel, the first green pixel and first under each grayscale in first pixel unit；And calculate institute
State the luminance mean value of the 4th picture, the luminance mean value of the 4th picture is the second red pixel in the second pixel unit, second green
The brightness value of pixel and the second blue pixel under each grayscale.
The invention has the advantages that：
The present invention provide it is a kind of display color of image compensation method and splicing display device, the compensation method include,
Before splicing display device shows image, brightness value of first sub-pix under each grayscale in liquid crystal display panel is obtained, with
And brightness value of second sub-pix under each grayscale in LED display panel is obtained, and calculate separately first under each grayscale
The difference of the brightness value of the brightness value of sub-pix and the second sub-pix corresponding with the first sub-pix color, and according to institute
It states difference and obtains compensation electric current, using the driving current value of the second sub-pix under compensation each grayscale of current regulation, that is, to mend
The driving current value of the second sub-pix of LED display panel is repaid, to show the process of image in splicing display device
In, the brightness of the brightness of the first sub-pix the second sub-pix corresponding with the first sub-pix color under each grayscale can be made
It is identical, reduce the difference of the color of the image shown by liquid crystal display and the color of the image shown by light emitting diode (LED) display screen
It is different, and then the color homogeneity of the general image shown by splicing display device can be improved, avoid general image generation from isolating
The problem of.
Description of the drawings
Fig. 1 is the flow chart of the compensation method of display color of image provided in an embodiment of the present invention；
Fig. 2 is the brightness value of acquisition the first sub-pix and the second sub-pix provided in an embodiment of the present invention under each grayscale
Flow chart one；
Fig. 3 is the brightness value of acquisition the first sub-pix and the second sub-pix provided in an embodiment of the present invention under each grayscale
Flowchart 2；
Fig. 4 is the relational graph of grayscale provided in an embodiment of the present invention and the first red pixel and the second red pixel；
Fig. 5 is the structural schematic diagram of splicing display device provided in an embodiment of the present invention.
Marginal data：
1, liquid crystal display panel 2, LED display panel 3, acquiring unit
31, collecting unit 32, processing unit 4, control unit
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, the present invention is carried below in conjunction with the accompanying drawings
A kind of compensation method of the display color of image supplied and splicing display device are described in detail.
Embodiment 1
The embodiment of the present invention 1 provides a kind of compensation method of display color of image, and the compensation method is applied to include liquid
The splicing display device of LCD panel and LED display panel, in conjunction with shown in Fig. 1 and Fig. 2, the compensation method packet
Include following steps：
Step 101, brightness value of each first sub-pix under each grayscale in liquid crystal display panel 1 is obtained, and obtains hair
Brightness value of each second sub-pix under each grayscale in optical diode display panel 2.
Liquid crystal display panel 1 includes multiple first pixel units, and each first pixel unit includes multiple first sub-pixes, the
One sub-pix is the first red pixel, the first green pixel or the first blue pixel.LED display panel 2 includes multiple second pictures
Plain unit, each second pixel unit include multiple second sub-pixes, and the second sub-pix is the second red pixel, the second green pixel or the
Two blue pixels.In embodiments of the present invention, each first pixel unit includes the first different sub-pix of three colors, i.e. three institutes
It is respectively the first red pixel, the first green pixel and the first blue pixel to state the first sub-pix；Each second pixel unit includes three face
The second different sub-pix of color, i.e. three second sub-pixes are respectively the second red pixel, the second green pixel and the second blue picture
Element.
(i.e. step 101) specifically includes the brightness value that the first sub-pix and the second sub-pix are obtained under each grayscale：
Brightness value of the blue pixel of the first red pixel, the first green pixel and first under each grayscale in liquid crystal display panel 1 is obtained respectively, with
And the second red pixel in LED display panel 2, the second green pixel and the second indigo plant pixel are obtained respectively under each grayscale
Brightness value.
Wherein, the embodiment of the present invention is to all have 256 ashes with liquid crystal display panel 1 and LED display panel 2
Illustrated for rank, corresponding first red pixel, the first green pixel, the first blue pixel, the second red pixel, the second green pixel and
Second blue pixel includes 256 brightness values.
Preferably, under dark room conditions, the first red pixel, the first green pixel and the in liquid crystal display panel 1 are obtained respectively
Brightness value of the one blue pixel under each grayscale, and under dark room conditions, obtain respectively second in LED display panel 2
Brightness value of the blue pixel of red pixel, the second green pixel and second under each grayscale, wherein the dark room conditions are that liquid is removed in room
There is no the environment of other light sources except LCD panel 1 or LED display panel 2.This way it is possible to avoid extraneous ring
Border light influences in liquid crystal display panel 1 in each first sub-pix and LED display panel 2 each second sub-pix each
Brightness value under grayscale.
It should be noted that the step of obtaining brightness value of first sub-pix under each grayscale exists with the second sub-pix of acquisition
The execution sequence of the step of brightness value under each grayscale is unlimited.
Step 102, the brightness value of the first sub-pix and opposite with the first sub-pix color is calculated separately under each grayscale
The difference of the brightness value for the second sub-pix answered, and compensation electric current is obtained according to the difference.
Specifically, calculate separately the brightness value of the first red pixel and the brightness value of the second red pixel under each grayscale first is poor
The brightness value and second of second difference of the brightness value of value, the brightness value of the first green pixel and the second green pixel and the first blue pixel
The third difference of the brightness value of blue pixel, and the first compensation electric current is obtained according to the first difference, obtain second according to the second difference
Electric current is compensated, obtaining third according to third difference compensates electric current.
Step 103, according to the driving current value of the second sub-pix under compensation each grayscale of current regulation, so that each grayscale
The brightness value of lower first sub-pix and identical as the corresponding brightness value of second sub-pix of the first sub-pix color.
Specifically, according to the driving current value of the second red pixel under first compensation each grayscale of current regulation under each grayscale,
So that the brightness value of the second red pixel is equal with the brightness value of the first red pixel under each grayscale, and mended according to second under each grayscale
The driving current value of the second green pixel under each grayscale of current regulation is repaid, so that the brightness value of the second green pixel and first under each grayscale
The brightness value of green pixel is equal, and according to the driving electricity of the second blue pixel under third compensation each grayscale of current regulation under each grayscale
Flow valuve, so that the brightness value of the second blue pixel is equal with the first blue brightness value of pixel under each grayscale.
101 to step 103 as can be seen that the benefit for the display color of image that the embodiment of the present invention 1 provides through the above steps
Compensation method passes through the brightness value of the first red pixel under each grayscale and the second red pixel before splicing display device shows image
Brightness value difference obtain first compensation electric current, and pass through first compensation each grayscale of current regulation under the second red pixel driving
Current value obtains the second compensation electricity by the difference of the brightness value of the brightness value and the second green pixel of the first green pixel under each grayscale
Stream, and by the driving current value of the second green pixel under second compensation each grayscale of current regulation, pass through the under each grayscale first blue picture
The difference of the brightness value of element and the brightness value of the second blue pixel obtains third and compensates electric current, and each by third compensation current regulation
The driving current value of second blue pixel under grayscale, i.e., to the second red pixel of the light emitting diode (LED) display screen under each grayscale, second
The driving current value of green pixel and the second blue pixel compensates, thus during splicing display device shows image, it can
So that the brightness value of the second red pixel of same gray level and the brightness value of the first red pixel are equal, the second green pixel of same gray level
Brightness value and the first green pixel brightness value it is equal, the brightness value of the second blue pixel of same gray level and the first blue pixel it is bright
Angle value is equal, the color that can accordingly reduce the image shown by liquid crystal display and the figure shown by light emitting diode (LED) display screen
The difference of the color of picture, and then the color homogeneity of the general image shown by splicing display device can be improved, to avoid whole
Body image, which is led to the problem of, to be isolated.
It should be noted that the second red pixel of the light emitting diode (LED) display screen 2 under each grayscale, the second green pixel and
It is also feasible that the driving current value of one or both of two blue pixels, which compensates, and still, above-mentioned compensation method is to liquid crystal
Display screen show the color of image and light emitting diode (LED) display screen show the color of image have differences the compensation effect of problem compared with
Difference.
Below in conjunction with Fig. 2 and Fig. 3 to obtaining brightness value (the i.e. step of the first sub-pix and the second sub-pix under each grayscale
101) two kinds of preferred implementations are described in detail.
As shown in Fig. 2, the brightness value for obtaining the first sub-pix and the second sub-pix under each grayscale specifically includes：
Step 11, acquire respectively the first sub-pix grou under each grayscale by same color in each first pixel unit at
First picture；And acquire respectively the second sub-pix grou under each grayscale by same color in each second pixel unit at
Two pictures.
Specifically, acquiring the first red picture being made of the first red pixel in each first pixel unit under each grayscale respectively
Face, the first green picture be made of the first green pixel in each first pixel unit and by the in each first pixel unit first blue pixel
The blue picture of the first of composition；And second be made of the second red pixel in each second pixel unit under each grayscale is acquired respectively
Red picture, the second green picture be made of the second green pixel in each second pixel unit and blue by each second pixel unit second
Second blue picture of pixel composition.
Step 12, the luminance mean value of the first picture is calculated separately, the first picture brightness mean value is and the first picture face
Brightness value of identical first sub-pix of color under each grayscale；And the luminance mean value of the second picture is calculated separately, described second
The luminance mean value of picture is brightness value of the second sub-pix identical with the second picture color under each grayscale.
Specifically, the luminance mean value of the first red picture, the first green picture and the first blue picture is calculated under each grayscale respectively,
The luminance mean value of the first red picture under calculated each grayscale be brightness value of the first red pixel under each grayscale, calculated
The luminance mean value of the first green picture is brightness value of first green pixel under each grayscale under each grayscale gone out, the calculated each ash of institute
The luminance mean value of the first blue picture is brightness value of the first blue pixel under each grayscale under rank；And it calculates under each grayscale respectively
The luminance mean value of second red picture, the second green picture and the second blue picture, under calculated each grayscale the second red picture it is bright
Degree mean value is brightness value of the second red pixel under each grayscale, under calculated each grayscale the luminance mean value of the second green picture be
Brightness value of second green pixel under each grayscale, under calculated each grayscale the luminance mean value of the second blue picture be the second blue picture
Brightness value of the element under each grayscale.
Obtaining the brightness value of the first sub-pix and the second sub-pix under each grayscale, (i.e. the another kind of step 101) is preferred real
Existing mode, as shown in figure 3, the brightness value for obtaining the first sub-pix and the second sub-pix under each grayscale specifically includes：
Step 11 ', acquisition is blue by the first red pixel, the first green pixel and first in each first pixel unit under each grayscale
The third picture of pixel composition；And it acquires under each grayscale by the second red pixel, the second green pixel in each second pixel unit
With the 4th picture of the second blue pixel composition.
Specifically, acquisition is blue by the first red pixel, the first green pixel and first in each first pixel unit under each grayscale
Pixel is superimposed the third picture to be formed (i.e. white picture), and acquires under each grayscale by the second red picture in each second pixel unit
The blue pixel of element, the second green pixel and second is superimposed the 4th picture to be formed (i.e. white picture).
Step 12 ', the luminance mean value of third picture is calculated, the luminance mean value of the third picture is in the first pixel unit
Brightness value of the blue pixel of first red pixel, the first green pixel and first under each grayscale；And the brightness of the 4th picture of calculating is equal
The luminance mean value of value, the 4th picture is that the blue pixel of the second red pixel, the second green pixel and second exists in the second pixel unit
Brightness value under each grayscale.
Specifically, calculate the luminance mean value of third picture under each grayscale, third picture under calculated each grayscale
Luminance mean value is brightness value of the blue pixel of the first red pixel, the first green pixel and first under each grayscale in the first pixel unit；
And the luminance mean value of the 4th picture is calculated under each grayscale, the luminance mean value of the 4th picture is the under the calculated each grayscale of institute
Brightness value of the blue pixel of second red pixel, the second green pixel and second under each grayscale in two pixel units.
By acquiring the luminance mean value for the picture being made of red pixel, green pixel and blue pixel superposition under each grayscale with true
The scheme of the brightness value of fixed red pixel, green pixel and blue pixel under each grayscale, compared to by acquiring respectively under each grayscale
The luminance mean value for the picture being made of red pixel, green pixel or blue pixel to determine that red pixel, green pixel and blue pixel exist respectively
The scheme of brightness value under each grayscale, the negligible amounts of the picture of required acquisition, correlation method is simple, save trouble and labor, still,
The luminance mean value for the picture being made of red pixel, green pixel and blue pixel superposition is formed with by red pixel, green pixel or blue pixel
The brightness value of sprite have differences, the brightness of corresponding acquired red pixel, green pixel and blue pixel under each grayscale
Value has differences with the intrinsic brilliance value of red pixel, green pixel and blue pixel under each grayscale.
For the scheme of brightness value of simplification acquisition first sub-pix and the second sub-pix under each grayscale, can obtain
The brightness value of first sub-pix and the second sub-pix under the grayscale of preset quantity, and calculate separately grayscale and the first sub-pix
The correspondence of the brightness value of brightness value and the second sub-pix, and the first sub-pix and the second Asia are calculated according to the correspondence
Brightness value of the pixel under other grayscale in addition to the grayscale of the preset quantity, wherein the preset quantity is less than described
The grayscale total quantity of liquid crystal display panel 1 or the LED display panel 2.
It is being preset specifically, obtaining the blue pixel of the first red pixel, the first green pixel and first in liquid crystal display panel 1 respectively
Brightness value under the grayscale of quantity, and respectively obtain LED display panel 2 in the second red pixel, the second green pixel and
Brightness value of the second blue pixel under preset quantity grayscale, and calculate separately the brightness value of grayscale and the first red pixel, first green
The brightness value of pixel, the first blue brightness value of pixel, the brightness value of the second red pixel, the brightness value of the second green pixel and second are blue
The correspondence of the brightness value of pixel, and the first red pixel, the first green pixel, the first blue picture are calculated according to the correspondence
The blue pixel of element, the second red pixel, the second green pixel and second is under other grayscale in addition to the grayscale of the preset quantity
Brightness value.
In order to which clear explanation first sub-pix of acquisition provided in an embodiment of the present invention and the second sub-pix are under each grayscale
The specific method of brightness value, below in conjunction with attached drawing 4 to obtaining the brightness value of the first red pixel and the second red pixel under each grayscale
Process be described in detail.
As shown in figure 4, obtaining the first red pixel and the second red pixel respectively in the bright of 63 grayscale, 127 grayscale and 200 grayscale
Angle value, according to brightness value d ' of the first red pixel in 63 grayscale, the brightness value e ' in 127 grayscale and in the brightness value of 200 grayscale
F ' can calculate the correspondence of grayscale and the brightness value of the first red pixel, i.e. curve B, according to the second red pixel in 63 grayscale
Brightness value d, the brightness value e in 127 grayscale and the brightness value f in 200 grayscale can calculate grayscale and the second red pixel
The correspondence of brightness value, i.e. curve A.Accordingly according to curve B can calculate the first red pixel locate 63 grayscale, 127 grayscale and
The brightness value under other grayscale except 200 grayscale can calculate the second red pixel according to curve A and locate 63 grayscale, 127 grayscale
With the brightness value under other grayscale except 200 grayscale.
The embodiment of the present invention is with by obtaining the first red pixel and the second red pixel in 63 grayscale, 127 grayscale and 200 ashes
Brightness value under rank, what calculating the first red pixel and the second red pixel illustrated for the brightness value under each grayscale.Certainly,
By obtaining the brightness value of the first red pixel and the second red pixel under the grayscale of other quantity, the first red pixel and second is calculated
Brightness value of the red pixel under each grayscale is also feasible.Obtain the first green pixel, the first blue pixel, the second green pixel and second
Brightness value of the method for brightness value of the blue pixel under each grayscale with acquisition the first red pixel and the second red pixel under each grayscale
Method it is identical, details are not described herein.
As shown in figure 4, through step 102 (calculate the difference of the ordinate of each grayscale lower curve A and the ordinate of curve B, and
Obtain compensation electric current according to the difference) and step 103 (drive of the second red pixel under each grayscale is reduced according to the electric current that compensates
Streaming current value) after, the brightness value of the second red pixel and the correspondence of grayscale such as curve C in LED display panel 2
It is shown, it is seen then that under each grayscale in liquid crystal display panel 1 in the brightness value and LED display panel 2 of first red pixel
The brightness value of second red pixel is essentially identical.
Embodiment 2
The embodiment of the present invention 2 also provides a kind of splicing display device, as shown in figure 5, the splicing display device includes liquid
LCD panel 1, LED display panel 2, acquiring unit 3 and control unit 4.
Acquiring unit 3 is used for, and obtains brightness value of each first sub-pix under each grayscale in liquid crystal display panel 1, and
Obtain brightness value of each second sub-pix under each grayscale in LED display panel 2.
Control unit 4 is used for, calculate separately under each grayscale the brightness value of the first sub-pix and with the first sub-pix face
The difference of the brightness value of corresponding second sub-pix of form and aspect, and compensation electric current is obtained according to the difference, and according to the compensation
The driving current value of second sub-pix under each grayscale of current regulation so that under each grayscale with the first sub-pix color phase
The brightness value of corresponding second sub-pix is identical with the brightness value of first sub-pix.
Specifically, liquid crystal display panel 1 includes multiple first pixel units, each first pixel unit includes multiple first sub-
Pixel, the first sub-pix are the first red pixel, the first green pixel or the first blue pixel.LED display panel 2 includes more
A second pixel unit, each second pixel unit include multiple second sub-pixes, and the second sub-pix is the second red pixel, second green
Pixel or the second blue pixel.In embodiments of the present invention, each first pixel unit includes the first different sub-pix of three colors,
That is three first sub-pixes are respectively the first red pixel, the first green pixel and the first blue pixel；Each second pixel unit packet
Include the second different sub-pix of three colors, i.e. three second sub-pixes be respectively the second red pixel, the second green pixel and
Second blue pixel.
Acquiring unit 3 obtains the first red pixel in liquid crystal display panel 1, the first green pixel and the first blue pixel each respectively
Brightness value under grayscale, and the second red pixel in LED display panel 2, the second green pixel and the second indigo plant are obtained respectively
Brightness value of the pixel under each grayscale.
Control unit 4 calculates separately first of the brightness value of the first red pixel and the brightness value of the second red pixel under each grayscale
The brightness value of second difference of the brightness value of difference, the brightness value of the first green pixel and the second green pixel and the first blue pixel and the
The third difference of the brightness value of two blue pixels, and obtain the first compensation electric current according to the first difference obtains the according to the second difference
Two compensation electric currents obtain third according to third difference and compensate electric current, and according to first compensation each ash of current regulation under each grayscale
The driving current value of second red pixel under rank so that under each grayscale the brightness value of the second red pixel and the first red pixel brightness value
It is equal, and according to the driving current value of the second green pixel under second compensation each grayscale of current regulation under each grayscale, so that each ash
The brightness value of the second green pixel is equal with the brightness value of the first green pixel under rank, and compensates electric current tune according to the third under each grayscale
The driving current value of the second blue pixel is saved under each grayscale, so that the brightness value of the second blue pixel and the first indigo plant pixel under each grayscale
Brightness value is equal.
It should be noted that control unit 4 can be microcontroller or central processing unit, control unit 4 can be integrated in liquid
On LCD panel 1 or LED display panel 2, it can also be separately provided.
The splicing display device that the embodiment of the present invention 2 provides, it is aobvious in splicing by the way that acquiring unit 3 and control unit 4 is arranged
Before showing device shows image, control unit 4 by the brightness value of the first red pixel under each grayscale acquired in acquiring unit 3 and
The difference of the brightness value of second red pixel obtains the first compensation electric current, and red by under first compensation each grayscale of current regulation second
The driving current value of pixel passes through the brightness value and the second green pixel of the first green pixel under each grayscale acquired in acquiring unit 3
Brightness value difference obtain second compensation electric current, and pass through second compensation each grayscale of current regulation under the second green pixel driving
Current value passes through the brightness value of the under each grayscale acquired in acquiring unit 3 first blue pixel and the brightness value of the second blue pixel
Difference obtains third and compensates electric current, and the driving current value of the second blue pixel under each grayscale of current regulation is compensated by third, i.e.,
To the driving current value of the second red pixel of the light emitting diode (LED) display screen under each grayscale, the second green pixel and the second blue pixel into
Row compensation, to which during splicing display device shows image, the brightness value of the second red pixel of same gray level can be made
It is equal with the brightness value of the first red pixel, the brightness value of the second green pixel of same gray level and the brightness value phase of the first green pixel
It is equal Deng the brightness value of the second blue pixel of, same gray level and the brightness value of the first blue pixel, it can accordingly reduce liquid crystal display
The difference of the color of the shown image of screen and the color of the image shown by light emitting diode (LED) display screen, and then spelling can be improved
The color homogeneity for connecing the general image shown by display device leads to the problem of to avoid general image and isolates.
Preferably, acquiring unit 3 also particularly useful for, obtain the first sub-pix and the second sub-pix preset quantity grayscale
Under brightness value, and calculate separately the correspondence of the brightness value of grayscale and the first sub-pix and the brightness value of the second sub-pix,
And the first sub-pix and the second sub-pix are calculated in other in addition to the grayscale of the preset quantity according to the correspondence
Brightness value under grayscale, wherein the preset quantity is less than the grayscale of liquid crystal display panel 1 or LED display panel 2
Total quantity.In this way, the process for obtaining the brightness value of the first sub-pix and the second sub-pix under each grayscale can be simplified, it is corresponding to save
Shi Shengli imitates the compensation of the driving current of the second sub-pix in light emitting diode (LED) display screen convenient for improving splicing display device
Rate.
As shown in figure 5, acquiring unit 3 may include collecting unit 31 and processing unit 32, collecting unit 31 is used for, respectively
Acquire under each grayscale by the first sub-pix grou of same color in each first pixel unit at the first picture；And acquisition exists
Under each grayscale by the second sub-pix grou of same color in each second pixel unit at the second picture.
Processing unit 32 is used for, and calculates separately the luminance mean value of the first picture, the luminance mean value of first picture be with
Brightness value of identical first sub-pix of first picture color under each grayscale；And calculate separately the second picture brightness it is equal
The luminance mean value of value, second picture is brightness value of the second sub-pix identical with the second picture color under each grayscale.
Specifically, collecting unit 31 acquires be made of the first red pixel in each first pixel unit under each grayscale respectively
First red picture, the first green picture be made of the first green pixel in each first pixel unit and by each first pixel unit
First blue picture of one blue pixel composition；And it acquires respectively under each grayscale by the second red pixel groups in each second pixel unit
At the second red picture, the second green picture being made of the second green pixel in each second pixel unit and by each second pixel unit
In the second blue pixel composition the second blue picture.
The brightness that processing unit 32 calculates the first red picture, the first green picture and the first blue picture under each grayscale respectively is equal
Value, institute calculated each grayscale under the first red picture luminance mean value be brightness value of the first red pixel under each grayscale, institute
The luminance mean value of the first green picture is brightness value of first green pixel under each grayscale under calculated each grayscale, and institute is calculated
The luminance mean value of the first blue picture is brightness value of the first blue pixel under each grayscale under each grayscale；And respectively under each grayscale
Calculate the luminance mean value of the second red picture, the second green picture and the second blue picture, the second red picture under the calculated each grayscale of institute
Luminance mean value be brightness value of the second red pixel under each grayscale, under calculated each grayscale the second green picture brightness it is equal
Value is brightness value of second green pixel under each grayscale, and the luminance mean value of the second blue picture is second under the calculated each grayscale of institute
Brightness value of the blue pixel under each grayscale.
Wherein, collecting unit 31 can be CCD camera.
It should be noted that collecting unit 31 is additionally operable to, acquisition is red by each first pixel unit first under each grayscale
The third picture of the blue pixel composition of pixel, the first green pixel and first；And it acquires under each grayscale by each second pixel unit
In the second red pixel, the second green pixel and the second blue pixel composition the 4th picture.
Processing unit 32 is additionally operable to, and calculates the luminance mean value of third picture, the luminance mean value of the third picture is first
Brightness value of the blue pixel of first red pixel, the first green pixel and first under each grayscale in pixel unit；And it calculates the 4th and draws
The luminance mean value in face, the luminance mean value of the 4th picture are the second red pixel in the second pixel unit, the second green pixel and the
Brightness value of the two blue pixels under each grayscale.
Specifically, collecting unit 31 acquires under each grayscale by the first red pixel, the first green picture in each first pixel unit
Element and the first blue pixel are superimposed the third picture to be formed (i.e. white picture), and acquire under each grayscale by each second pixel unit
In the second red pixel, the second green pixel and the second blue pixel be superimposed the 4th picture to be formed (i.e. white picture).
Processing unit 32 calculates the luminance mean value of third picture under each grayscale, third picture under calculated each grayscale
Luminance mean value be the brightness of the first red pixel in the first pixel unit, the first green pixel and the first blue pixel under each grayscale
Value；And the luminance mean value of the 4th picture is calculated under each grayscale, the luminance mean value of the 4th picture under calculated each grayscale
For brightness value of the blue pixel of the second red pixel, the second green pixel and second in the second pixel unit under each grayscale.
By acquiring the luminance mean value for the picture being made of red pixel, green pixel and blue pixel superposition under each grayscale with true
The scheme of the brightness value of fixed red pixel, green pixel and blue pixel under each grayscale, compared to by acquiring respectively under each grayscale
The luminance mean value for the picture being made of red pixel, green pixel or blue pixel to determine that red pixel, green pixel and blue pixel exist respectively
The scheme of brightness value under each grayscale, the negligible amounts of the picture of required acquisition, correlation method is simple, save trouble and labor, still,
The luminance mean value for the picture being made of red pixel, green pixel and blue pixel superposition is formed with by red pixel, green pixel or blue pixel
The brightness value of sprite have differences, the brightness of corresponding acquired red pixel, green pixel and blue pixel under each grayscale
Value has differences with the intrinsic brilliance value of red pixel, green pixel and blue pixel under each grayscale, so as to be shown to liquid crystal display
The compensation effect that the color of color and light emitting diode (LED) display screen the display image of image has differences problem is poor.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of compensation method of display color of image, is applied to include liquid crystal display panel and LED display panel
Splicing display device, which is characterized in that the method includes：
Brightness value of each first sub-pix under each grayscale in the liquid crystal display panel is obtained, and obtains the light-emitting diodes
Brightness value of each second sub-pix under each grayscale in pipe display panel；
Calculate separately under each grayscale the brightness value of first sub-pix and with the first sub-pix color corresponding second
The difference of the brightness value of sub-pix, and compensation electric current is obtained according to the difference；
According to it is described compensation each grayscale of current regulation under second sub-pix driving current value so that under each grayscale with it is described
The brightness value of corresponding second sub-pix of first sub-pix color is identical with the brightness value of first sub-pix.
2. the compensation method of display color of image according to claim 1, which is characterized in that described to obtain first Asia
The brightness value of pixel and second sub-pix under each grayscale specifically includes：
The brightness value of first sub-pix and second sub-pix under the grayscale of preset quantity is obtained, and calculates separately ash
The correspondence of rank and the brightness value of first sub-pix and the brightness value of second sub-pix, and according to the corresponding pass
System calculates first sub-pix and second sub-pix under other grayscale in addition to the grayscale of the preset quantity
Brightness value, wherein the preset quantity is less than the liquid crystal display panel or the grayscale of the LED display panel is total
Quantity.
3. the compensation method of display color of image according to claim 1, which is characterized in that the liquid crystal display panel packet
Multiple first pixel units are included, each first pixel unit includes multiple first sub-pixes, and first sub-pix is the first red picture
The blue pixel of element, the first green pixel or first；
The LED display panel includes multiple second pixel units, and each second pixel unit includes the multiple second sub- pictures
Element, second sub-pix are the second red pixel, the second green pixel or the second blue pixel.
4. the compensation method of display color of image according to claim 3, which is characterized in that described to obtain first Asia
The brightness value of pixel and second sub-pix under each grayscale specifically includes：
Acquire respectively the first sub-pix grou under each grayscale by same color in each first pixel unit at first draw
Face；And acquire under each grayscale by the second sub-pix grou of same color in each second pixel unit at second draw
Face；
The luminance mean value of first picture is calculated separately, the luminance mean value of first picture is and first picture color
Brightness value of identical first sub-pix under each grayscale；And the luminance mean value of second picture is calculated separately, described
The luminance mean value of two pictures is brightness value of the second sub-pix identical with second picture color under each grayscale.
5. the compensation method of display color of image according to claim 3, which is characterized in that described to obtain first Asia
The brightness value of pixel and second sub-pix under each grayscale specifically includes：
Acquisition is made of under each grayscale the blue pixel of the first red pixel, the first green pixel and first in each first pixel unit
Third picture；And acquisition under each grayscale by the second red pixel in each second pixel unit, the second green pixel and the
4th picture of two blue pixel compositions；
The luminance mean value of the third picture is calculated, the luminance mean value of the third picture is the first red picture in the first pixel unit
Brightness value of the blue pixel of element, the first green pixel and first under each grayscale；And calculate the luminance mean value of the 4th picture, institute
The luminance mean value for stating the 4th picture is the second red pixel in the second pixel unit, the second green pixel and the second indigo plant pixel in each grayscale
Under brightness value.
6. a kind of splicing display device, including liquid crystal display panel and LED display panel, which is characterized in that further include
Acquiring unit and control unit, the acquiring unit are used for, and obtain in the liquid crystal display panel each first sub-pix in each ash
Brightness value under rank, and obtain brightness value of each second sub-pix under each grayscale in the LED display panel；
Described control unit is used for, calculate separately under each grayscale the brightness value of first sub-pix and with first sub-pix
The difference of the brightness value of corresponding second sub-pix of color, and compensation electric current is obtained according to the difference, and according to the benefit
Repay the driving current value of second sub-pix under each grayscale of current regulation so that under each grayscale with the first sub-pix color
The brightness value of corresponding second sub-pix is identical with the brightness value of first sub-pix.
7. splicing display device according to claim 6, which is characterized in that the acquiring unit is specifically used for, and obtains institute
The brightness value of the first sub-pix and second sub-pix under the grayscale of preset quantity is stated, and calculates separately grayscale and described the
The correspondence of the brightness value of the brightness value of one sub-pix and second sub-pix, and according to described in correspondence calculating
The brightness value of first sub-pix and second sub-pix under other grayscale in addition to the grayscale of the preset quantity,
In, the preset quantity is less than the grayscale total quantity of the liquid crystal display panel or the LED display panel.
8. splicing display device according to claim 6, which is characterized in that the liquid crystal display panel includes multiple first
Pixel unit, each first pixel unit include multiple first sub-pixes, and first sub-pix is the first red pixel, the first green picture
Element or the first blue pixel；
The LED display panel includes multiple second pixel units, and each second pixel unit includes the multiple second sub- pictures
Element, second sub-pix are the second red pixel, the second green pixel or the second blue pixel.
9. splicing display device according to claim 8, which is characterized in that the acquiring unit includes collecting unit and place
Unit is managed, the collecting unit is used for, and acquires respectively under each grayscale by the of same color in each first pixel unit
One sub-pix grou at the first picture；And it acquires under each grayscale by second of same color in each second pixel unit
Sub-pix grou at the second picture；
The processing unit is used for, and calculates separately the luminance mean value of first picture, and the luminance mean value of first picture is
Brightness value of the first sub-pix identical with first picture color under each grayscale；And calculate separately second picture
Luminance mean value, the luminance mean value of second picture is the second sub-pix identical with second picture color each
Brightness value under grayscale.
10. splicing display device according to claim 8, which is characterized in that the acquiring unit include collecting unit and
Processing unit, the collecting unit are used for, and acquisition is under each grayscale by the first red pixel, first in each first pixel unit
The third picture of green pixel and the first blue pixel composition；And it acquires under each grayscale by each second pixel unit second
4th picture of the blue pixel composition of red pixel, the second green pixel and second；
The processing unit is used for, and calculates the luminance mean value of the third picture, the luminance mean value of the third picture is first
Brightness value of the blue pixel of first red pixel, the first green pixel and first under each grayscale in pixel unit；And calculate described the
The luminance mean value of the luminance mean value of four pictures, the 4th picture is the second red pixel, the second green pixel in the second pixel unit
With brightness value of the second blue pixel under each grayscale.
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