CN107680540A - A kind of colored electroweting display color bearing calibration and its device - Google Patents
A kind of colored electroweting display color bearing calibration and its device Download PDFInfo
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- CN107680540A CN107680540A CN201710968257.XA CN201710968257A CN107680540A CN 107680540 A CN107680540 A CN 107680540A CN 201710968257 A CN201710968257 A CN 201710968257A CN 107680540 A CN107680540 A CN 107680540A
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/348—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on the deformation of a fluid drop, e.g. electrowetting
Abstract
The present invention relates to a kind of colored electroweting display color bearing calibration and its device.Non-linear relation of this method according to each primary colours relative luminance L of colored electroweting device and driving voltage V（L V relations）By the reverse L V conversion to each color primaries data, conversion causes the reduction of original image color to reproduce the L V characteristics that can adapt to colored electroweting display, so that each primary colours relative luminance realizes linear approximate relationship with driving voltage caused by the control of primary color image data, finally realize that color image data reproduces true accurately color over the display；This method realizes that circuit arrangement mainly includes：Main Control Unit, color image data input interface unit, RGB channel data reverse L V converter units, RGB gray scale modulators unit, line scanner unit, power subsystem etc..The present invention realizes that color image data reproduces true accurately color over the display, can dramatically improve the image restoring display capabilities of colored electroweting device, realize more excellent display image quality.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of colored electroweting display color bearing calibration and its
Device.
Background technology
In recent years, due to making reflection type display device receive much concern the demand of display low-power consumption and outdoor reading,
Wherein there is a kind of Novel reflection-type electrowetting (electrowetting also known as electricity moistening) (Electro Wetting Device, EWD) display
Device, because it is based on being shown under powering state to being realized under the control of polar liquid, so relative to other reflective displays
Reaction speed is very fast for device, while can also realize high brightness, high-contrast, low energy consumption.But how on Electrowetting device
Accurately coloured image even video is still greatly improved space for display.It is accurate in order to be realized on electric moistening display
Coloured image and video show, it is necessary to have it is a set of can according to Electrowetting device electrology characteristic design coloured image realization side
Method.
General common electric moistening display realizes that the device architecture that coloured image and video are shown has RGB (RGB) tilings
Frame mode and CMY (blue or green pinkish red yellow) two kinds of stepped construction mode.Wherein the Electrowetting device of RGB tile arrangements mode will be each
The unit tiling of primary colours is placed, and forms a display pixel by R, G, B three primary color elements respectively, then form one by numerous pixels
Display.Each primary colours produce corresponding driving voltage through gray scale modulator modulation by corresponding primary colours data respectively and drive the base
Color element ink is flexible and shows the color of different brightness, and three primary colours display unit realizes colour by additive space colour mixture
Display.Wherein the elementary layer of each primary colours is stacked and put by the Electrowetting device of CMY stepped constructions mode, respectively by the base of C, M, Y tri-
Color element is laminated placement and forms a display pixel from top to bottom, then forms a display by numerous pixels.Each primary colours point
Not by corresponding primary colours data through gray scale modulator modulation produce corresponding driving voltage drive the primary colour unit ink flexible and
The color of different brightness is shown, three primary colours display unit is spacing color mixed by subtraction and realizes colored display.In fact show
Characteristic of the reproduction of equipment color with various display devices in itself is closely related, while shown currently used for electric moistening display
Color image data is not the special view data of Electrowetting device, and it is (bright that research shows that these view data are more suitable for gray scale
Degree) and linear relationship is presented for view data or the flat-panel display device of linear approximate relationship uses.It is known that typical electricity
The display brightness (or aperture opening ratio) for soaking display device is non-linear relation between driving voltage, therefore by these cromograms
As data direct carry out gray modulation after go to drive colored electroweting display to realize the display of coloured image, it will cause institute
It is not accurate to reduce the color of image of display, the problems such as coloured image distortion is serious.
The content of the invention
It is an object of the invention to provide a kind of colored electroweting display color bearing calibration and its device, realizes colored
View data reproduces that true accurately color, the image restoring that can dramatically improve colored electroweting device show over the display
Show ability, realize more excellent display image quality.
To achieve the above object, the technical scheme is that：A kind of colored electroweting display color bearing calibration, according to
According to each primary colours relative luminance L of colored electroweting device and driving voltage V non-linear relation, i.e. L-V curves, by each color
Reverse L-V the conversion of primary colours data, conversion cause the reduction of original image color reproduces to can adapt to colored electroweting display
L-V characteristics, so that each primary colours relative luminance realizes linear approximate relationship with driving voltage caused by the control of primary color image data,
It is final to realize that color image data reproduces true accurately color over the display.
In an embodiment of the present invention, described reverse L-V conversion refers to that construction each primary colours of colored electroweting device are relatively bright
Spend the inverse function of L and driving voltage V nonlinear curve function so that it is multiplied with L-V curves, is finally realized for each
The synthesis L-V curves of gradation modulating range tend to be linear, so that each primary colours relative luminance controls with primary color image data
Caused driving voltage realizes linear approximate relationship, and electric moistening display reproducing color therewith tends to one with color of image to display
Cause.
In an embodiment of the present invention, this method specifically includes following steps,
Step S1：It is relative by experiment or the colored electroweting device driven by existing experimental data acquisition needs
Brightness or the L-V curves of aperture opening ratio and driving voltage, and the curve section for gray modulation is determined, then using Mathematical Fitting
The mathematical function expression formula that method obtains the curve in the curve section is designated as L1(V)；
Step S2：According to the method for solving of mathematics inverse function, L is obtained1(V) the inverse function V of function1(L), and the letter is tried to achieve
Several power exponents are designated as m；
Step S3：Gradation reproducible grade G and display brightness L is reduced according to needed for colored electroweting device shows each primary colours
Between relational expression G=K × L1/mBrightness value L corresponding to each tonal gradation of reduction needed for calculating；
Step S4：In conjunction with electrowetting Electronic Paper L-V curves trying to achieve generation according to the brightness value L that step S3 is tried to achieve, those are bright
Driving voltage value V needed for angle value；
Step S5：The driving voltage value V tried to achieve according to step S4 is further according to producing the modulator approach of driving voltage so as to asking
Obtain the input driving primary color image data value corresponding to each outputting drive voltage V；
Through with up-conversion step S1-S5 realize each primary colours raw image data to according to colored electroweting display in itself
Reverse L-V the correction process of intrinsic L-V characteristics, realize each primary colours relative luminance and driving electricity caused by the control of primary color image data
Pressure realizes linear approximate relationship, finally realizes that color image data reproduces true accurately color over the display.
In an embodiment of the present invention, the colored electroweting device shows reduction gradation reproducible grade G needed for each primary colours
Quantity be 2 secondary number formulary.
In an embodiment of the present invention, the colored electroweting device each primary colours relative luminance L and driving voltage V's is non-thread
Sexual intercourse, rise the non-polar fluid contraction phase for voltage or voltage declines the nonfluid expansionary phase.
Present invention also offers a kind of colored electroweting display color means for correcting for realizing method described above, including
Main Control Unit, color image data input interface unit, RGB channel data reverse L-V converter units, RGB gray scale modulators
Unit, line scanner unit, power subsystem；The Main Control Unit realizes colored electroweting display color school for completion
The programming Control of positive control circuit system；The color data input interface unit is defeated for completing three primary colours color image data
Enter control；The RGB channel data reverse L-V converter units are used to realize raw color image data to targeted color picture number
According to conversion control；The RGB gray scale modulators unit is used for each greyscale image data and produces control to target drives voltage modulated
System；The line scanner unit is used to produce the voltage pulse signal needed for the scanning of Electrowetting device row；The power subsystem is used
Powered in for whole device.
In an embodiment of the present invention, the RGB channel data reverse L-V converter units are by with the storage for searching table function
Device, FPGA module or the integrated circuit composition for possessing calculation function.
In an embodiment of the present invention, the RGB gray scale modulators unit is corresponding to possessing and being converted into view data
Pulse width or be converted into respective amplitude magnitude of voltage integrated circuit form, for by rgb image data be converted into correspondingly
Pulse width signal or driving voltage be output on the corresponding row electrode of colored electroweting display screen.
In an embodiment of the present invention, the line scanner unit by address decoder and pulse amplifier circuit or by
Row scanning integrated device is formed.
In an embodiment of the present invention, the power subsystem is by multivoltage output switch power source or linear voltage stabilization voltage electricity
Road is formed.
Compared to prior art, the invention has the advantages that：It is present invention adds including that in general is colored
View data carries out the processing circuit module of reverse L-V conversion according to electric moistening display L-V characteristics, realizes each primary colours original graph
As data to the reverse L-V correction process according to electric moistening display inherently L-V characteristics, each primary colours relative luminance is finally realized
With primary color image data control caused by driving voltage realize linear approximate relationship, finally realize color image data in display
It is upper to reproduce true accurately color, the image restoring display capabilities of colored electroweting device can be dramatically improved, are realized more excellent
Display image quality.
Brief description of the drawings
Fig. 1 is typical electric moistening display relative luminance and driving voltage graph of relation.
Fig. 2 is that the embodiment of the present invention selectes the normalized relative luminance of electric moistening display and driving voltage graph of a relation.
Fig. 3 is the normalized relative luminance of electric moistening display and the anti-letter of driving voltage that the embodiment of the present invention solves to obtain
Number graph of a relation.
Fig. 4 is the division of reverse L-V curves intensity gray scale and row driving voltage relation schematic diagram that the embodiment of the present invention is tried to achieve.
Fig. 5 is colored electroweting display color correcting circuit apparatus system block diagram provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
A kind of colored electroweting display color bearing calibration of the present invention, it is relative according to each primary colours of colored electroweting device
Brightness L and driving voltage V non-linear relation, i.e. L-V curves, by the reverse L-V conversion to each color primaries data, conversion makes
The reduction for obtaining original image color reproduces the L-V characteristics that can adapt to colored electroweting display, so that each primary colours are relatively bright
Degree realizes linear approximate relationship with driving voltage caused by the control of primary color image data, finally realizes that color image data is being shown
True accurately color is reproduced on device.Described reverse L-V conversion refer to construct each primary colours relative luminance L of colored electroweting device with
The inverse function of driving voltage V nonlinear curve function so that it is multiplied with L-V curves, is finally realized for each primary colours
The synthesis L-V curves in gray modulation section tend to be linear, so that each primary colours relative luminance produces with the control of primary color image data
Driving voltage realize linear approximate relationship, electric moistening display reproducing color therewith reaches unanimity with color of image to display.
This method specifically includes following steps,
Step S1：It is relative by experiment or the colored electroweting device driven by existing experimental data acquisition needs
Brightness or the L-V curves of aperture opening ratio and driving voltage, and the curve section for gray modulation is determined, then using Mathematical Fitting
The mathematical function expression formula that method obtains the curve in the curve section is designated as L1(V)；
Step S2：According to the method for solving of mathematics inverse function, L is obtained1(V) the inverse function V of function1(L), and the letter is tried to achieve
Several power exponents are designated as m；
Step S3：Gradation reproducible grade G and display brightness L is reduced according to needed for colored electroweting device shows each primary colours
Between relational expression G=K × L1/mBrightness value L corresponding to each tonal gradation of reduction needed for calculating；
Step S4：In conjunction with electrowetting Electronic Paper L-V curves trying to achieve generation according to the brightness value L that step S3 is tried to achieve, those are bright
Driving voltage value V needed for angle value；
Step S5：The driving voltage value V tried to achieve according to step S4 is further according to producing the modulator approach of driving voltage so as to asking
Obtain the input driving primary color image data value corresponding to each outputting drive voltage V；
Through with up-conversion step S1-S5 realize each primary colours raw image data to according to colored electroweting display in itself
Reverse L-V the correction process of intrinsic L-V characteristics, realize each primary colours relative luminance and driving electricity caused by the control of primary color image data
Pressure realizes linear approximate relationship, finally realizes that color image data reproduces true accurately color over the display.
The colored electroweting device shows the secondary number formulary that the quantity of reduction gradation reproducible grade G needed for each primary colours is 2.
Each primary colours relative luminance L of colored electroweting device and driving voltage V non-linear relation, rise for voltage non-
Polar fluid contraction phase or voltage decline the nonfluid expansionary phase.
Present invention also offers a kind of colored electroweting display color means for correcting for realizing method described above, including
Main Control Unit, color image data input interface unit, RGB channel data reverse L-V converter units (including R channel datas
Reverse L-V converter units, G channel data reverse L-V converter units, channel B data reverse L-V converter units), RGB gray scale modulator lists
First (including R gray scale modulators unit, G gray scale modulators unit, B gray scale modulators unit), line scanner unit, power supply list
Member；The Main Control Unit is used to complete the programming control for realizing colored electroweting display color correction control circuit system
System；The color data input interface unit is used to complete the input control of three primary colours color image data；The RGB channel data
Reverse L-V converter units are used to realize that the conversion of raw color image data to targeted color view data controls；The RGB gray scales
Modulator unit is used for each greyscale image data and produces control to target drives voltage modulated；The line scanner unit is used to produce
Voltage pulse signal needed for raw Electrowetting device row scanning；The power subsystem is used to power for whole device.
The RGB channel data reverse L-V converter units are by with memory device, FPGA module or the tool for searching table function
The integrated circuit of standby calculation function is formed.View data is converted into corresponding arteries and veins by the RGB gray scale modulators unit by possessing
The integrated circuit for rushing width or being converted into the magnitude of voltage of respective amplitude is formed, corresponding to rgb image data is converted into
Pulse width signal or driving voltage are output on the corresponding row electrode of colored electroweting display screen.The line scanner unit
Formed by address decoder and pulse amplifier circuit or by row scanning integrated device.The power subsystem is exported by multivoltage
Switching Power Supply or linear voltage stabilization potential circuit are formed.
It is below the specific implementation example of the present invention.
A kind of colored electroweting display color bearing calibration of the present invention, comprises the following steps：
Step S1：The Electrowetting device relative luminance to be driven is obtained by experiment or existing experimental data (or to open
Mouth rate) and driving voltage L-V relation curves, and the curve section for gray modulation is determined in advance, then by the song in the section
The mathematical function expression formula that line obtains the curve with Mathematical Fitting method is designated as L1(V)；
Step S2：According to the method for solving of mathematics inverse function, L is obtained1(V) the inverse function L of function2(V), and the letter is tried to achieve
Several power exponents are designated as m；Step S3：Gradation reproducible grade G is reduced according to needed for electrowetting shows each primary coloursALLIt is bright with display
Relational expression G=K × the L spent between L1/mBrightness value L corresponding to each tonal gradation of reduction needed for can calculating；
Step S4：According to the brightness value L that step S3 is tried to achieve in conjunction with electrowetting Electronic Paper reverse L-V functions L2(V) curve can
In the hope of producing driving voltage value V needed for these brightness values；
According to the Electrowetting device relative luminance (or aperture opening ratio) tried to achieve and driving voltage reverse L-V relation functions L2
(V) the GTG sum GALL that curve and electrowetting gray scale are shown, by function L2(V) longitudinal axis normalization brightness is divided into 16 deciles,
By mapping etc., method draws the GALL-1 bars straight line parallel with voltage axle, and respectively with reverse L-V relation functions L2(V) curve
It is intersecting, then draw the GALL-1 bars straight line parallel with normalization luminance axis from joining as starting point again, and respectively with voltage
Axle intersects；To normalize no-voltage as voltage starting point 0, the voltage with voltage axis intersecting parallel line joining is successively read respectively
Value, is designated as V1, V2 ... ..., VGALL-1 respectively, the 3rd row normalization row driving electricity that these magnitudes of voltage are listed in Table 1 below respectively
Pressure value.
Table 1
Step S5：The driving voltage value V tried to achieve according to step S4 is further according to producing the modulator approach of driving voltage so as to asking
Obtain the input driving primary color image data value corresponding to each outputting drive voltage V；
Specific embodiment is：Each normalization row driving voltage value V is multiplied by GALL(value 16) and then round up
To integer value, this integer value is then transformed into corresponding binary number, the binary numeral is normalization row driving
The view data exported after the corresponding corrections of magnitude of voltage V.For example normalization driving voltage value is corresponding to the 7th gray value
" 0.62 ", by 0.62 × 16=9.92, it is after rounding " 10 ", its corresponding binary number is " 1010 ", then " 1010 " are base
Chromatic number is according to the data exported after original 7th gray scale correction.The method for computing data of remaining gray scale correction correspondence is with above institute
State that method is the same, soon can be in the hope of the primary color image data after 16 corrections, these data are listed in the 4th row of table 1.
In the present embodiment, it will be assumed that to be driven the colored electroweting display screen of display as RGB tiling addition colour mixtures
Formula colored electroweting display screen, resolution ratio are 64 row and 64 rows, and required driving voltage polarity is born to arrange positive row.Measure the electricity simultaneously
Display screen typical case relative luminance is soaked with driving voltage relation curve as shown in figure 1, selecting electricity profit from Fig. 1 L-V curves simultaneously
The wet normalized relative luminance of display is with driving voltage relation curve as shown in Fig. 2 we select current common electronicses simultaneously
Paper display coloured image is 16 GTGs per gradation, and then we become according to the bearing calibration of colored electroweting display color
S1~S3 steps of method are changed, solve the obtained normalized relative luminance of electric moistening display and driving voltage inverse function relation
Curve is as shown in figure 3, the reverse L-V curves intensity gray scale division tried to achieve according to S4 steps is illustrated with row driving voltage relation simultaneously
As shown in Figure 4.
As shown in figure 5, on the basis of colored electroweting display color bearing calibration described above, it is provided by the present invention
Be to realize that circuit arrangement scheme mainly includes：It includes Main Control Unit, color image data input interface unit, RGB
Channel data reverse L-V converter units, RGB gray scale modulators unit, line scanner unit, power subsystem；The master controller list
Member is used to complete the programming Control for realizing colored electroweting display color correction control circuit system；The color data input
Interface unit is used to complete the input control of three primary colours color image data；The RGB channel data reverse L-V converter units are used for real
The conversion of existing raw color image data to targeted color view data controls；The RGB gray scale modulators unit is used for each ash
Spend view data and produce control to target drives voltage modulated；The line scanner unit is used to produce the scanning of Electrowetting device row
Required voltage pulse signal；The power subsystem is powered to other unit modules.
Main Control Unit by the singlechip CPU with programming Control function, embedded type CPU or computer CPU etc., I
Select STM32 series monolithics, for completing to realize the programming of colored electroweting display color correction control circuit system
Control, complete Data Transmission Controlling and SECO etc..Color data input interface unit is by with caching function or latch
The Digital Logical Circuits of function is formed, and we select HC245 eight bit data buffer chips, for completing gradation data input-buffer
Control, according to the case for this embodiment, the gradation data of input is 4, and input timing is completed by STM32 single-chip microcomputers.RGB channel
Data reverse L-V converter units, by with searching the memory device of table function, fpga chip or possess the integrated of calculation function
Circuit is formed, and we select AlteraFPGAMAX family chip EPM7032SC7, look-up table journey is write using Verilog language
Sequence, control for realizing that raw color image data converts to targeted color greyscale image data, constructed in the present embodiment
FPGA look-up table means meet the input of 4 bit binary datas, the output of primary color image data look-up table is inputted according to the secondary series of table 1
Primary color image data after 4th row output calibration.
Then RGB gray scale modulator lists are respectively fed to from the table look-up data of output of R, G, channel B data reverse L-V converter units
Position, 4 primary colours data are modulated to arrange required driving voltage value respectively and to be respectively outputted to colored electroweting display screen each
In the row driving electrodes of corresponding primary colours, arranged as electric moistening display and show drive voltage signal.By the present embodiment it is assumed that color
Color electrowetting display screen is shared per the road row driving electrodes of primary colours 64, it is therefore desirable to the such row electricity of 64 × 3 sets of row gray scale modulators
Press process circuit.
Line scanner unit is formed by address decoder and pulse amplifier circuit or by row scanning integrated device, is used for
The voltage pulse signal needed for the scanning of Electrowetting device row is produced, we select AlteraFPGAMAX family chips
EPM7128SC7 and the pulse integrated amplifier ULN2803 chips composition with negative voltage enlarging function, the work of the operating die
The threshold voltage settings that Electrowetting device is chosen to be as voltage are -23.35V, and the row that 64 rows are shared according to electrowetting display screen drives
Moving electrode, it is therefore desirable to which the input of 6-64 decoder modules i.e. 6 bit address signals, 6 bit address are write using Verilog language
Signal is produced according to view data scanning sequence by STM32 single-chip microcomputers and is input to the address signal input of EPM7128SC7 chips
End, caused 64 tunnel a line cycle effective impulse scanning impulse output, and it is separately input to 8 ULN2803 integrated amplifier cores
Voltage amplification is carried out in piece, finally connects the effective scanning impulse of negative voltage after amplification and 64 tunnel electrowetting display screen line electrodes
Connect.Power subsystem is made up of multivoltage output switch power source or linear voltage stabilization potential circuit, for for each of circuit arrangement
Operating voltage needed for module offer, the main voltage including needed for Digital Logical Circuits voltage, linear voltage amplifier unit,
Voltage needed for line scanner unit etc..
It should be noted that the electrowetting display screen assumed in the embodiment of the present invention is that RGB three primary colours flush systems addition is color
Color display, combined or using the stacked subtraction realities of CMY if the electric moistening display to be driven is other primary colours
During the display screen of existing colour, above-described circuit implementation process can still use, only stacked colored aobvious for CMY
Show for device circuit, the input of color image data input interface unit is not in general color image data, but is first passed through
The input of CMY color image datas is transformed to by RGB color image data, the core content of remaining circuit is recited above with us
Drive circuit system is completely the same, can thus realize the correction of all kinds colored electroweting display color and realize essence
The display of quasi- color image.
It should be noted that the resolution ratio for the electrowetting display screen that the embodiment of the present invention is assumed is 64 × 64 dot matrix, this
Inventive method is also fully applicable for various resolution color electrowetting display screens lower than it or higher than it in fact, now required
Drive of row and column way do corresponding increase and decrease.If after reaching certain resolution certainly, required main controller CPU is just needed
The processor of higher performance is selected, smoothly could handle and control this circuit system, but whether using which kind of chip, sheet
The core idea of invention will not change.
It should be noted that the colored electroweting display screen that the embodiment of the present invention is assumed is passive drive display screen, its
The method and circuit arrangement of the real present invention are also applied for the electrowetting display screen of active matrix driving, will obtain same Expected Results.
Each several part circuit module described above monolithic chip be uniformly coordinated control under, generation realize a width width technicolo
Wetting display also original image shows required row-column electrode drive voltage signal, last can reality on electrowetting display screen
Now amount to the display of 4096 color color images per the GTG of primary colours 16, and reach the reproduction of precise image color, greatly improve figure
The display effect of picture.
It should be noted that the embodiment of the present invention assumes that electric moistening display part relative luminance is bent with driving voltage relation
Line chart as shown in Fig. 1, in fact bearing calibration of the invention be not particularly limited the curve for the given shape, it is general come
As long as it is non-linear relation to say the curve, bearing calibration of the invention can be applicable.
It should be noted that electrowetting also known as electricity moistening, the present invention in electric moistening display color calibration method equally
Suitable for electric wet-type display.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, caused function are made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (10)
- A kind of 1. colored electroweting display color bearing calibration, it is characterised in that：According to each primary colours phase of colored electroweting device To brightness L and driving voltage V non-linear relation, i.e. L-V curves, by the reverse L-V conversion to each color primaries data, conversion So that the reduction of original image color reproduces the L-V characteristics that can adapt to colored electroweting display, so that each primary colours are relative Brightness realizes linear approximate relationship with driving voltage caused by the control of primary color image data, finally realizes color image data aobvious Show and true accurately color is reproduced on device.
- 2. according to the method for claim 1, it is characterised in that：Described reverse L-V conversion refers to construct colored electroweting device The inverse function of each primary colours relative luminance L of part and driving voltage V nonlinear curve function so that it is multiplied with L-V curves, Finally realize that the synthesis L-V curves for each gradation modulating range tend to be linear, so that each primary colours relative luminance and base Driving voltage caused by the control of color image data realizes linear approximate relationship, electric moistening display reproducing color therewith with it is to display Color of image reaches unanimity.
- 3. according to the method for claim 1, it is characterised in that：This method specifically includes following steps,Step S1：The colored electroweting device relative luminance for needing to drive is obtained by experiment or by existing experimental data Or the L-V curves of aperture opening ratio and driving voltage, and the curve section for gray modulation is determined, then using Mathematical Fitting method The mathematical function expression formula for obtaining the curve in the curve section is designated as L1(V)；Step S2：According to the method for solving of mathematics inverse function, L is obtained1(V) the inverse function V of function1(L), and the function is tried to achieve Power exponent is designated as m；Step S3：Between the reduction gradation reproducible grade G and display brightness L according to needed for colored electroweting device shows each primary colours Relational expressionBrightness value L corresponding to each tonal gradation of reduction needed for calculating；Step S4：Tried to achieve according to the brightness value L that step S3 is tried to achieve in conjunction with electrowetting Electronic Paper L-V curves and produce those brightness values Required driving voltage value V；Step S5：The driving voltage value V tried to achieve according to step S4 is every so as to try to achieve further according to the modulator approach for producing driving voltage Input driving primary color image data value corresponding to one outputting drive voltage V；Through with up-conversion step S1-S5 realize each primary colours raw image data to according to colored electroweting display inherently Reverse L-V the correction process of L-V characteristics, realize that each primary colours relative luminance is realized with driving voltage caused by the control of primary color image data Linear approximate relationship, finally realize that color image data reproduces true accurately color over the display.
- 4. according to the method for claim 3, it is characterised in that：The colored electroweting device shows and reduced needed for each primary colours Gradation reproducible grade G quantity is 2 secondary number formulary.
- 5. according to the method for claim 1, it is characterised in that：Each primary colours relative luminance L of colored electroweting device with Driving voltage V non-linear relation, rise the non-polar fluid contraction phase for voltage or voltage declines the nonfluid expansionary phase.
- 6. a kind of colored electroweting display color means for correcting for realizing any methods described of claim 1 to 5, its feature exist In：Including Main Control Unit, color image data input interface unit, RGB channel data reverse L-V converter units, RGB gray scales Modulator unit, line scanner unit, power subsystem；The Main Control Unit realizes colored electroweting display for completion The programming Control of color correction control circuit system；The color data input interface unit is used to complete three primary colours coloured image Data input controls；The RGB channel data reverse L-V converter units are used to realize raw color image data to targeted color figure As the conversion of data controls；The RGB gray scale modulators unit is used for each greyscale image data and produced to target drives voltage modulated Raw control；The line scanner unit is used to produce the voltage pulse signal needed for the scanning of Electrowetting device row；The power supply list Member is used to power for whole device.
- 7. device according to claim 6, it is characterised in that：The RGB channel data reverse L-V converter units are by with looking into Look for memory device, FPGA module or the integrated circuit composition for possessing calculation function of table function.
- 8. device according to claim 6, it is characterised in that：The RGB gray scale modulators unit is by possessing picture number Formed according to the integrated circuit of pulse width corresponding to being converted into or the magnitude of voltage for being converted into respective amplitude, for by RGB image Data conversion is output on the corresponding row electrode of colored electroweting display screen into corresponding pulse width signal or driving voltage.
- 9. device according to claim 6, it is characterised in that：The line scanner unit is put by address decoder and pulse Big device circuit is made up of row scanning integrated device.
- 10. device according to claim 6, it is characterised in that：The power subsystem by multivoltage output switch power source or Person's linear voltage stabilization potential circuit is formed.
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