CN101290413A - Image module design method LCD device using the method - Google Patents

Abstract

The invention relates to a method for designing an image module and a liquid crystal display using the method. A design chromatic value is generated by formulating a target chromatic value, adjusting the area configuration of a red pixel, a green pixel and a blue pixel in each pixel, stimulating and calculating according to the optical properties of parts of the liquid crystal display; the circulatory adjustment of the area configuration of the red pixel, the green pixel and the blue pixel in each pixel and the simulated calculation of the optical property ensure that the generated design chromatic value is close to the target chromatic value, thereby being capable of adjusting the color of the liquid crystal display and solving the problem of color deviation.

Description

The method for designing of image module and use the LCD of this method

Technical field

The present invention relates to a kind of method for designing of image module and use the LCD of this method, particularly a kind of LCD that has the method for designing of the image module of adjusting the image color function and use this method.

Background technology

LCD utilizes liquid crystal to represent literal and image, and liquid crystal itself can be not luminous, and the shading value of display then is to utilize reflected light or back side secondary light source, to produce different demonstration effects.Since LCD have frivolous property, low voltage drive, low consumption electrically, advantages such as colorize and low price, become the display device of generally using at present.

The development of LCD, by twisted nematic (Twisted Nematic, TN) the type LCD develops to STN Super TN (Super Twisted Nematic, STN) type LCD, convert thin film transistor (TFT) (Thin Film Transistor, TFT) LCD again to.

The wavelength dependence that is characterized as high comparative, transmittance of twisted nematic (TN) type LCD is low, response speed is very fast, the color range mileometer adjustment shows that characteristic is good, driving voltage is low, angle of visibility is narrow and scala media accommodation angle dependence is big up and down.STN Super TN (STN) type LCD to be characterized as high multiplex characteristic, colorize and response speed slower.Each pixel of thin film transistor (TFT) (TFT) LCD is controlled by four transistors, thin-film transistor technologies is in the present LCD Technology, a kind of technology of optimum resolution is provided, this kind Thin Film Transistor-LCD is called active-matrix formula LCD again, its advantage has broad angle of visibility, high comparative, high resolving power, faster than the response speed of passive matrix type, and the utmost point is applicable to the processing of dynamic image and jumbo demonstration etc.

One of shortcoming of STN Super TN (STN) type LCD is that response speed is fast inadequately, so during playing animation, has the phenomenon of smear.In order to promote the ability of playing animation, so continue to attempt the LCD product that exploitation has high-speed response.Along with the quickening of product response speed, the problem of misalignment has but taken place.

Another shortcoming of STN Super TN (STN) type LCD is that white black contrast is not high enough.In order to improve contrast, so adjust optical design; But the problem that often has is contrast have been improved, and the problem of misalignment but takes place.

When all being lighted by red, green and blue pixel of all pixels, white (W) picture of LCD forms, therefore the colourity of white picture is to decide according to red, green and blue other colourity of time pixel, but also has client can require red picture, green picture, blue picture and the colourity of picture in vain simultaneously.Therefore, how to satisfy the colourity demand of these four pictures simultaneously, become the problem that must solve.

See also Fig. 1, it is the area arrangement plan of one red pixel, one green pixel and one blue pixel in the colour element of prior art.In Fig. 1, it is identical with the area of blue time pixel B 1 to form red pixel R1 of a pixel, green pixel G1.For colored STN Super TN (STN) type/thin film transistor (TFT) (TFT) LCD, in order to adapt to the difference that product is used, the arrangement mode of red pixel R1 in its pixel, green pixel G1 and blue time pixel B 1 is with different.For example, when desire showed dynamic menu, red time pixel R1, green pixel G1 were arranged in mosaic or leg-of-mutton form with blue time pixel B 1 with needs; When desire showed tableaux, red pixel R1, green pixel G1 and blue time pixel B 1 were arranged in needs the form of vertical bar shape.

And after manufacturing product, when the color of the white picture of LCD produced deviation, the color that can revise backlight adjusted, and the color that also can change red pixel R1, green pixel G1 or blue time pixel B 1 pigment adjusts; But if utilize the modification backlight to adjust color, then being limited in scope of color adjustment is common, can only be near the adjustment of chromaticity coordinate (0.31,0.31); Too many as if departing from, because light emitting diode (LED) manufacturer needs special this situation that adapts to, so the output of kind light emitting diode (LED) is few, its delivery can generation problem.On the other hand, if by the pigment of adjusting red pixel R1, green pixel G1 or blue time pixel B 1, revise the colourity that white shows, so, also can change simultaneously redness, the green and blue colourity that shows, though the colourity that causes white to show meets client's demand, red, green and blue shown colourity becomes outside the specification.

Then, existing design example is described, to be applied to the design of high-speed responsive product.Because response time of STN Super TN (STN) type LCD and crack, liquid crystal pond (Cell Gap) d square are directly proportional; D is littler when crack, liquid crystal pond (Cell Gap), response time is also little, that is answer speed is also faster, but the anisotropy flexion rate parameter Δ n of required liquid crystal will heal greatly, and the pairing wavelength dispersibility of while anisotropy flexion rate parameter Δ n (or Δ n*d) will heal greatly.At this, wavelength dispersibility is defined as:

$D=\frac{{\mathrm{\Δnd}}_{\mathrm{at}450\mathrm{nm}}}{{\mathrm{\Δnd}}_{\mathrm{at}590\mathrm{nm}}}.$

See also Fig. 2, it is the data plot that existing plurality of liquid crystals wavelength dispersibility D changes along with anisotropy flexion rate parameter Δ n.In Fig. 2, comprise the totally 673 stroke count strong points of 17 kinds of liquid crystal, and,, positive correlation trend is arranged really though the positive correlation of its anisotropy flexion rate parameter Δ n and wavelength dispersibility D is not quite similar for the liquid crystal of different liquid crystal manufacturers or different model.For example, with STN Super TN (STN) type LCD, under the design of Δ nd=0.84 μ m, when normal liquid crystal pond crack d is set at 6.3 μ m, required anisotropy flexion rate parameter Δ n is 0.84/6.3=0.133, at this moment, and wavelength dispersibility D=1.11 as can be seen from Figure 2.And for the purpose of rapid answer, when liquid crystal pond crack d was set at 4.7 μ m, required anisotropy flexion rate parameter Δ n was 0.84/4.7=0.179, at this moment, and wavelength dispersibility D=1.16 as can be seen from Figure 2.According to above-mentioned explanation, the Δ nd value in the time of can obtaining D=1.11 and D=1.16, as shown in table 1:

	Δnd at 400nm	Δnd at 450nm	Δnd at 500nm	Δnd at 550nm
					D＝1.11	979.9nm	912.8nm	869.5nm	840.0nm
D＝1.16	1062.7nm	948.2nm	881.4nm	840.0nm
						Δnd at 600nm	Δnd at 650nm	Δnd at 700nm
D＝1.11	819.0nm	803.5nm	791.7nm
					D＝1.16	813.1nm	794.9nm	782.2nm

The Δ nd value of table 1 different wave length dispersiveness

In the existing design example, initial optical design condition is as follows: the torsion angle of ccontaining group of (not being shown among the figure) LCD of the liquid crystal of not switching on is 240 °, Δ nd=0.84 μ m; Last Polarizer (not being shown among the figure) angle is 10 °; Upper phase difference plate (not being shown among the figure) angle is 70 °; The next phase difference plate (not being shown among the figure) angle is 110 °; Following Polarizer (not being shown among the figure) angle is 80 °.Design result as shown in Figure 3 and Figure 4, Fig. 3 is during for the dispersed D=1.11 of existing design example medium wavelength, the calculating dichroism of white picture and black picture; Fig. 4 is when having design example medium wavelength dispersiveness D=1.16 now, the calculating dichroism of white picture and black picture.As can be known, when wavelength dispersibility D=1.16, black picture can be blue partially from Fig. 3 and Fig. 4; According to experience, when wavelength dispersibility D＞1.14, color relation has significant variation, has to change design to overcome the problem of color.

In existing design example, with the starting point that is designed to of above-mentioned wavelength dispersibility D=1.11, when wavelength dispersibility D＞1.14, the change of optical design condition is as follows: going up Polarizer (not being shown among the figure) angle is 11～15 °; Upper phase difference plate (not being shown among the figure) angle is 65～69 °; The Δ nd of ccontaining group of (not being shown among the figure) LCD of the liquid crystal of not switching on is reduced to 780～800nm; The next phase difference plate (not being shown among the figure) angle is 111～115 °; Following Polarizer (not being shown among the figure) angle is 75～79 °.Result after the change design as shown in Figure 5, Fig. 5 is the white picture after the change design and the calculating dichroism of black picture during for the dispersed D=1.16 of existing design example medium wavelength.At this moment, the blue partially problem of black picture will be improved, but white picture of while also can produce the problem of inclined to one side indigo plant.Even use the design of other different angles, the collocation of different phasic difference value, or use the phasic difference plate of liquid crystal coating, the problem of generation is still identical.

In sum, as can be known: how to allow twisted nematic (TN) type LCD, STN Super TN (STN) type LCD and twisted nematic (TN) type thin film transistor (TFT) (TFT) LCD have high-speed response and high white black contrast concurrently, and satisfy the colourity demand of red (R) picture, green (G) picture, indigo plant (B) picture and white (W) picture simultaneously, for designing mainspring of the present invention.

Therefore, this case inventor is in view of the shortcoming of above-mentioned prior art, through concentrated research, and in line with the spirit of working with perseverance, creates the method for designing of image module of the present invention and uses the LCD of this method.

Summary of the invention

The invention provides a kind of method for designing of image module and use the LCD of this method, it can solve the shortcoming described in the background technology, can adjust the color of LCD, solves the problem of misalignment.

For reaching above-mentioned purpose, the present invention first proposes a kind of method for designing of image module, at first, formulates a target chromatic value; Then, the area configuration of one red pixel, one green pixel and one blue pixel in each pixel of circulation adjustment, a design chromatic value that allows emulation and generation obtain can be near the target chromatic value.By the adjustment of inferior elemental area ratio, and then adjust the shown colourity of LCD, reach the effect of improving misalignment.

The present invention second proposes a kind of LCD, comprises an image module, and it is to utilize above-mentioned method for designing designed.

The method for designing of a kind of image module that the present invention first proposes comprises the following steps:

At first, a. formulates a target chromatic value; Then, b. sets the area configuration of one red pixel, one green pixel and one blue pixel in each pixel; Then, c. simulates and produces a design chromatic value; Then, d. this target chromatic value and this design chromatic value relatively; Then, e. repeating step b is to steps d, between target chromatic value and design chromatic value in an error amount.

The end of described step a comprises the following steps: that also it is a target chromaticity coordinate that a1. sets this target chromatic value;

Described step c comprises the following steps:

C1. setting this design chromatic value is a design chromaticity coordinate; And

C2. produce this design chromaticity coordinate, this design chromaticity coordinate is an one through a chromaticity coordinate and a reflection chromaticity coordinate.

Described step c2 comprises the following steps:

C21. this design chromaticity coordinate of setting the desire generation was for seeing through chromaticity coordinate;

C22. set up a light source dichroism;

C23. set up one and see through dichroism; And

C24. produce and to see through chromaticity coordinate.

Described step c22 comprises the following steps: that c221. sets up this light source dichroism of a backlight module light source;

Described step c23 comprises the following steps:

C231. on one first glass substrate, make a blusher colo(u)r filter, pass this blusher colo(u)r filter, measure and produce a red optical filter through dichroism by an incident light;

C232. on one second glass substrate, make a green colored filter, pass this green colored filter, measure and produce a green optical filter through dichroism by this incident light;

C233. on one the 3rd glass substrate, make a blue color filters, pass this blue color filters, measure and produce a blue optical filter through dichroism by this incident light;

C234. utilize this incident light to pass a through mode ray machine, produce a ray machine and see through dichroism;

C235. utilize this red optical filter to see through dichroism through dichroism, this indigo plant optical filter through dichroism and this ray machine, produce and be somebody's turn to do through dichroism through dichroism, this green optical filter;

Wherein, described step c234 comprises the following steps:

C2341. set up this incident light and pass a mathematical model of this through mode ray machine and at least one parameter in this mathematical model;

C2342. utilize a theoretical value transmittance curve and the measured value transmittance curve of at least one embodiment and each this embodiment, these parameters of regression Calculation; And

C2343. according to these parameters, produce this ray machine and see through dichroism, wherein this through mode ray machine comprises Polarizer, a Polarizer on ccontaining group of the liquid crystal and of not switching on;

Wherein, described step c2342 comprises the following steps:

C23421. pass ccontaining group of this time Polarizer, this liquid crystal of not switching on and one first embodiment that should go up Polarizer in regular turn by this incident light, analyze this theoretical value transmittance curve that produces this first embodiment, measure this measured value transmittance curve that produces this first embodiment; And

C23422. by this theoretical value transmittance curve of this first embodiment and this measured value transmittance curve of this first embodiment, the ccontaining group of parameter of at least one liquid crystal of not switching in these parameters of regression Calculation.

Described through mode ray machine also comprises a phasic difference plate, and also comprises the following steps: at the end of step c23422

C23423. pass this time Polarizer, this phasic difference plate and one second embodiment that should go up Polarizer in regular turn by this incident light, analyze this theoretical value transmittance curve that produces this second embodiment, measure this measured value transmittance curve that produces this second embodiment; And

C23424. by this theoretical value transmittance curve of this second embodiment and this measured value transmittance curve of this second embodiment, at least one phasic difference board parameter in these parameters of regression Calculation;

Described through mode ray machine also comprises liquid crystal coating phasic difference plate, and also comprises the following steps: at the end of step c23422

C23425. utilize this incident light to pass this time Polarizer, this liquid crystal coating phasic difference plate and one the 3rd embodiment that should go up Polarizer in regular turn, analyze this theoretical value transmittance curve that produces the 3rd embodiment, measure this measured value transmittance curve that produces the 3rd embodiment; And

C23426. by this theoretical value transmittance curve of the 3rd embodiment and this measured value transmittance curve of the 3rd embodiment, at least one liquid crystal in these parameters of regression Calculation is coated with the phasic difference board parameter;

Described through mode ray machine also comprises the N layer liquid crystal of a white picture and a black picture one, once a phasic difference plate and a upper phase difference plate, and also comprises the following steps: at the end of step c23422

C23427. utilize this incident light to pass this time Polarizer, the next phase difference plate, this white picture and the N layer liquid crystal that is somebody's turn to do black picture one, upper phase difference plate and one the 4th embodiment that should go up Polarizer in regular turn, analyze this theoretical value transmittance curve that produces the 4th embodiment, measure this measured value transmittance curve that produces the 4th embodiment; And

C23428. by this theoretical value transmittance curve of the 4th embodiment and this measured value transmittance curve of the 4th embodiment, the ccontaining group of pictures parameter of at least one liquid crystal in these parameters of regression Calculation; Or

Before step c23421, also comprise the following steps: to set this liquid crystal and comprise a liquid crystal layer for ccontaining group.

Before described step c231, also comprise the following steps: to set this incident light from this backlight module light source.

Described step c24 comprises the following steps:

C241. utilize this light source dichroism and should see through dichroism, produce an X values, a Y values and a Z values; And

C242. utilize this X values, this Y values and this Z values, produce and to see through chromaticity coordinate.

Comprise the following steps: also that between described step c241 and step c242 actual measurement produces one first coefficient, revises this Y values; And/or

Comprise the following steps: also that at the end of step c242 actual measurement produces at least one second coefficient, revise and to see through chromaticity coordinate.

Described step c2 comprises the following steps:

Cc21. this design chromaticity coordinate of setting the desire generation is this reflection chromaticity coordinate;

Cc22. set up a light source dichroism;

Cc23. set up a reflection beam splitting characteristic; And

Cc24. produce this reflection chromaticity coordinate.

Described step cc22 comprises the following steps: that cc221. sets up a reflection this light source dichroism with light source;

Step cc23 comprises the following steps: that cc231. utilizes an incident light, a blusher colo(u)r filter, a green colored filter, a blue color filters and a reflective ray machine, sets up this reflection beam splitting characteristic;

Wherein before step cc231, also comprise the following steps: to set this incident light from this reflection light source.

The method for designing of a kind of image module provided by the invention and use the LCD of this method, have following characteristics: by formulating a target chromatic value, via adjusting one red pixel in each pixel, the area configuration of one green pixel and one blue pixel, and according to the optical characteristics of LCD component part, emulation and computing in addition, to produce a design chromatic value, one red pixel in each pixel is adjusted in circulation then, the area configuration of one green pixel and one blue pixel and the simulation calculating of optical characteristics make the design chromatic value of generation can be near the target chromatic value.So, can adjust the color of LCD, and solve the problem of misalignment.

Description of drawings

Fig. 1 is the area arrangement plan of one red pixel, one green pixel and one blue pixel in the colour element of prior art;

Fig. 2 is the data plot that existing plurality of liquid crystals wavelength dispersibility D changes along with anisotropy flexion rate parameter Δ n;

The calculating dichroism of Fig. 3 white picture and black picture during for the dispersed D=1.11 of existing design example medium wavelength;

The calculating dichroism of Fig. 4 white picture and black picture during for the dispersed D=1.16 of existing design example medium wavelength;

Fig. 5 is the white picture after the change design and the calculating dichroism of black picture during for the dispersed D=1.16 of existing design example medium wavelength;

Fig. 6 is the area arrangement plan of one red pixel, one green pixel and one blue pixel in the colour element of the present invention's proposition;

Fig. 7 is the actual measurement light source dichroism of LED-backlit module light source in the first embodiment of the invention;

Fig. 8 be in the first embodiment of the invention under the standard C light source actual measurement dichroism of red-green-blue color optical filter;

Fig. 9 is that the calculating of ccontaining group of white picture of liquid crystal in the first embodiment of the invention sees through dichroism;

Figure 10 in the first embodiment of the invention under the standard C light source indivedual red-green-blue color optical filters add that the calculating of ccontaining group of white picture of liquid crystal sees through dichroism; And

Figure 11 in the first embodiment of the invention under the standard C light source all red-green-blue color optical filters add that the calculating of ccontaining group of white picture of liquid crystal sees through dichroism.

Main symbol description

R1: red pixel

G1: green pixel

B1: blue time pixel

Embodiment

For the method for designing of clearer detailed narration image module proposed by the invention and use the LCD of this method,, enumerate a plurality of preferred embodiments and be illustrated below in conjunction with Fig. 6～Figure 11:

At first be the chromatic value that sets objectives, target chromatic value in the present embodiment is a target chromaticity coordinate, that is do not changing under redness, the green and blue colourity that shows, change the colourity that white shows as desire, then one red pixel R1, one green pixel G1 come corresponding with the area of one blue pixel B 1 in the colour element to change.

See also Fig. 6, it is the area arrangement plan of one red pixel, one green pixel and one blue pixel in the colour element that present embodiment proposed.As shown in Figure 2, with Fig. 1 situation relatively under, if red, the green and blue color that shows is constant, and white is redder partially, the area of red pixel R1 will strengthen.

The method that present embodiment is introduced is applicable to the through mode display, also applicable to reflected displaying device.For the through mode display, light becomes incident light after sending from the backlight module light source, and incident light enters the through mode display, passes the through mode display then, to arrive human eye or measurement equipment; For reflected displaying device, light becomes incident light after sending with light source from reflection, and incident light enters reflected displaying device, then by reflected displaying device internal reflection light echo source side to, to arrive human eye or measurement equipment.Follow-up embodiment introduces the inventive method with the through mode LCD.

Then, light source dichroism database and the method that sees through the dichroism database set up is described.According to the method for expressing of described color in JIS Z 8701 standards, visible wavelength range is 380～780nm, and wherein every 5nm gets a measured value, and calculates the chromaticity coordinate of 2 degree angle of visibility standard C light sources, the value that is obtained for (x=0.3101, y=0.3162).Because wavelength is lacking perception of human eyes contribution below the 400nm and more than the 700nm, add for reduced data, through calculating, in wavelength coverage 400nm～700nm, every interval 10nm gets a measured value, and calculate the chromaticity coordinate of 2 degree angle of visibility standard C light sources, the value that is obtained for (x=0.3100, y=0.3165).With the former relatively, the difference of both calculated values is following the 4th of radix point only, so the collection of follow-up data is all carried out in the latter's mode with calculating.

In the LCD, light is set out by the backlight module light source, and ccontaining group of (not being shown among the figure) LCD arrives human eye or measurement equipment through liquid crystal, and light source and each material all can influence the colourity of final product.At first, the light source radiation dichroism is described:

Backlight radiation dichroism: via measurement, obtaining the dichroism of different colourity backlights, as the backlight dichroism of inclined to one side Huang, moderate or inclined to one side indigo plant, with usefulness as subsequent calculations.

For seeing through dichroism, below be divided into two parts and do explanation, one be that colored filter (ColorFilter) sees through dichroism, another is that the ray machine of through mode ray machine is through dichroism.

Colored filter (Color Filter) sees through dichroism: red painted material is produced on one first glass substrate, makes red painted material form a blusher colo(u)r filter; Green painted material is produced on one second glass substrate, makes green painted material form a green colored filter; The blue stain material is produced on one the 3rd glass substrate, makes the blue stain material form a blue color filters.Allow incident light pass blusher colo(u)r filter, green colored filter and blue color filters respectively, and incident light is from backlight module light source, standard sources or selected light source.Via measurement, when obtaining different colour saturation, a red optical filter of blusher colo(u)r filter, green colored filter and blue color filters sees through dichroism, a green optical filter and sees through dichroism and a blue optical filter through dichroism, with the usefulness as subsequent calculations.

Then, the ray machine that utilizes simulation and calculating to ask for liquid crystal through mode ray machine sees through dichroism.Because when Polarizer (not being shown among the figure), phasic difference plate (not being shown among the figure) (are not shown among the figure for ccontaining group with liquid crystal, the combination of materials (comprising liquid crystal layer) that comprises glass and glass the inside) after LCD combines, the transmitance influence that also has phasic difference and caused, therefore, the factor of phasic difference must be showed, asked for then.With regard to regard to colored STN Super TN (STN) type LCD, the through mode ray machine is made up of plural optical element, for example, Polarizer → ccontaining group of LCD of the next phase difference plate → liquid crystal → upper phase difference plate → when going up Polarizer, the calculating of the transmitance of each optical element is to represent with the mathematical model of following Jones matrix (Jones Matrix) down when the incident light process:

Polarizer: $\left(\begin{array}{c}1\\ 0\end{array}\right);$

General phasic difference plate: $\left(\begin{array}{cc}{e}^{-\mathrm{i\Γ}/2}& 0\\ 0& e^{\mathrm{i\Γ}/2}\end{array}\right);$

The phasic difference plate of liquid crystal coating or the ccontaining group of LCD of liquid crystal that does not switch on:

$\left(\begin{array}{cc}\cos X-i\frac{\mathrm{\Γ}\sin X}{2X}& \mathrm{\φ}\frac{\sin X}{X}\\ -\mathrm{\φ}\frac{\sin X}{X}& \cos X+i\frac{\mathrm{\Γ}\sin X}{2X}\end{array}\right);$

Wherein, $\mathrm{\Γ}=\frac{2\mathrm{\π}}{\mathrm{\λ}}\mathrm{\Δnd},$ $X=\sqrt{{\mathrm{\φ}}^2+{\left(\frac{\mathrm{\Γ}}{2}\right)}^2},$ φ is the liquid crystal anglec of rotation.

Ccontaining group of white picture of LCD of liquid crystal or black picture: when utilizing Jones matrix (Jones Matrix) to resolve, thickness according to crack, liquid crystal pond (Cell Gap) d, be considered as N (for example N=40) layer phasic difference sheetpile stack form, and each layer has angle of inclination, Δ nd value and long axis of liquid crystal molecule direction parameter; Integrate these conditions, the transmitance physical behavio(u)r of ccontaining group of white picture of LCD of liquid crystal or black picture is expressed as mathematical model.

Utilize above-mentioned representation, add suitable coordinate conversion, calculate the polarized condition of last outgoing according to this,

It is expressed as $\left(\begin{array}{c}{V}_x\\ V_y\end{array}\right).$

So, can calculate transmitance, it is expressed as (V _x) ²+ (V _y) ²And the transmitance under the different wave length promptly constitutes ray machine through dichroism.

Then, in the transmitance mathematical model of each optical element, introduce at least one parameter, cooperate at least one measured value then, and then obtain these parameters, and according to these parameters, the ray machine that sees through dichroism and through mode ray machine that produces each optical element sees through dichroism.And the adquisitiones of the parameter in ccontaining group of LCD mathematical model of the liquid crystal of not switching on is as follows:

According to the method that Pochi Yeh and Claire Gu two people are introduced, wherein use Jones matrix (JonesMatrix), to calculate incident light through Polarizer → ccontaining group of transmitance that LCD → Polarizer was produced of the liquid crystal of not switching on, transmitance is expressed as:

$T=\frac{1}{2}\left[\begin{array}{c}{\cos }^2(\mathrm{\α}-\mathrm{\β})-{\sin }^{2}X\sin 2\mathrm{\β}\sin 2\mathrm{\α}\\ +\frac{\mathrm{\φ}}{2X}\sin 2X\sin 2(\mathrm{\α}-\mathrm{\β})-{\mathrm{\φ}}^2\frac{{\sin }^{2}X}{X^2}\cos 2\mathrm{\β}\cos 2\mathrm{\α}\end{array}\right];$

Wherein,

α=light incident side sees through shaft angle degree-light incident side orientation angle;

β=exiting side sees through shaft angle degree-exiting side orientation angle;

φ=liquid crystal the anglec of rotation;

$X=\sqrt{{\mathrm{\φ}}^2+\frac{{(2\mathrm{\π\Δnd}/\mathrm{\λ})}^2}{4}};$

$\mathrm{\Δnd}=a+\frac{b}{{\mathrm{\λ}}^2}+\frac{c}{{\mathrm{\λ}}^4};$

λ=lambda1-wavelength, incident light is from backlight module light source, standard sources or selected light source.

More than produced with " φ, a, b, c, α " is the theoretical value transmittance curve of variable; Then, utilize the measured value transmittance curve of measurement generation corresponding to mathematical model; Then, the theoretical value transmittance curve and the measured value transmittance curve that will comprise variable " φ, a, b; c; α " carry out regressing calculation, in the hope of the value of " φ, a; b; c, α " these 5 variablees, that is have tried to achieve ccontaining group of parameter values of not energising liquid crystal in ccontaining group of LCD mathematical model of the liquid crystal of not switching on.

Then, the adquisitiones of parameter in the phasic difference plate mathematical model of general phasic difference plate and liquid crystal coating is described:

One, general phasic difference plate:

According to the method that Pochi Yeh and Claire Gu two people are introduced, wherein use Jones matrix (JonesMatrix), to calculate incident light through the transmitance that Polarizer → phasic difference plate → Polarizer is produced, transmitance is expressed as:

$T=\frac{1}{2}[{\cos }^2(\mathrm{\α}-\mathrm{\β})-{\sin }^2\frac{\mathrm{\π}\·\mathrm{\Δnd}}{\mathrm{\λ}}\sin 2\mathrm{\β}\sin 2\mathrm{\α}];$

Wherein:

α=light incident side sees through shaft angle degree-phasic difference optical axis angle;

β=exiting side sees through shaft angle degree-phasic difference optical axis angle;

λ=lambda1-wavelength, incident light is from backlight module light source, standard sources or selected light source.

Then, utilize theoretical value transmittance curve and measured value transmittance curve, ask for the phasic difference board parameter numerical value in the phasic difference plate mathematical model.

Two, the phasic difference plate of liquid crystal coating:

Because this phasic difference plate is to the carryover effects of light, just as ccontaining group of LCD of the liquid crystal of not switching on, therefore we utilize the same procedure of asking for the parameter in ccontaining group of LCD mathematical model of the liquid crystal of not switching on, ask for the liquid crystal coating phasic difference board parameter numerical value in the phasic difference plate mathematical model of liquid crystal coating.

As for, the adquisitiones of ccontaining group of white picture of LCD of liquid crystal or black picture mathematics Model parameter:

With ccontaining group of white picture of LCD of liquid crystal is example, the method of being introduced according to Pochi Yeh and Claire Gu two people, wherein use Jones matrix (Jones Matrix), to calculate incident light through N (for example N=40) layer liquid crystal → upper phase difference plate of Polarizer → the next phase difference plate → white picture down → the go up transmitance mathematical model that Polarizer is produced.And its Jones matrix (Jones Matrix) separately of N layer liquid crystal, then by ccontaining group of parameter that LCD tried to achieve of the above-mentioned liquid crystal of not switching on, the angle of inclination and the long axis of liquid crystal molecule direction parameter of existing each layer liquid crystal of collocation can obtain.Then, utilize theoretical value transmittance curve and measured value transmittance curve, ask for the ccontaining group of white frame parameter numerical value of liquid crystal in the white picture mathematical model of ccontaining group of LCD of liquid crystal.Identical method also is applicable to that ccontaining group of LCD of liquid crystal deceives picture, to obtain ccontaining group of black frame parameter numerical value of liquid crystal.

See through dichroism, green optical filter and see through dichroism, blue optical filter and see through dichroism and ray machine obtaining red optical filter through after the dichroism, according to the mutual configuration of red, green, blue optical filter and through mode ray machine, produce in conjunction with after see through dichroism.

Now, utilize the light source dichroism produced and see through dichroism, calculate and produce a design chromatic value, the design chromatic value in the present embodiment is a design chromaticity coordinate.When being applied to the through mode ray machine of present embodiment, the design chromaticity coordinate is one to see through chromaticity coordinate, and when being applied to reflective ray machine, the design chromaticity coordinate is a reflection chromaticity coordinate.

According to the method for expressing of described color in JIS Z 8701 standards, object color tristimulus values X, Y, Z asks method as follows:

X values: X=K ∫ S (λ) x (λ) T (λ) d λ;

Y values: Y=K ∫ S (λ) y (λ) T (λ) d λ;

Z values: Z=K ∫ S (λ) z (λ) T (λ) d λ;

Coefficient: $K=\frac{100}{\∫S\left(\mathrm{\λ}\right)\stackrel{\‾}{y}\left(\mathrm{\λ}\right)\mathrm{d\λ}};$

Wherein:

S (λ): the dichroism of light source;

X (λ), y (λ), z (λ): the isochrome function of XYZ color specification system;

T (λ): see through dichroism, be applied to the through mode ray machine;

Then, utilize X values, Y values and Z values, try to achieve through chromaticity coordinate (x, y):

$x=\frac{X}{X+Y+Z},$ $y=\frac{Y}{X+Y+Z}.$

In order to check the Y values that calculates and the correctness that sees through chromaticity coordinate, and consider to exclude of the influence of the normalized optical part of calculating to transmitance.So the embodiment with white picture measures to backlight, produce brightness value, the 2nd Y values and second the measured value through chromaticity coordinate.Then, by more described calculated value and described measured value, produce a correction factor, the Y values that gets of corrected Calculation also can produce more than one second correction factor according to this, and corrected Calculation gets according to this sees through chromaticity coordinate.

Utilize simulation with calculate produce see through chromaticity coordinate after, the comparison object chromaticity coordinate with see through chromaticity coordinate.When the target chromaticity coordinate and see through between the chromaticity coordinate outside an error amount, the area that then continues to adjust in each pixel one red pixel R1, one green pixel G1 and one blue pixel B 1 disposes; Continue simulation and produce another to see through chromaticity coordinate; Reach continuation comparison object chromaticity coordinate and produce through chromaticity coordinate.When the target chromaticity coordinate and see through between the chromaticity coordinate in an error amount, represent that the colourity of designed through mode ray machine can meet demand.

Then, enumerate first embodiment, so that the method for designing of above-mentioned image module to be described.See also table 2, it is the dichroism of ccontaining group of white picture of backlight, colored filter and liquid crystal.The data of table 3 is at red pixel R1: green pixel G1: the area ratio of blue time pixel B 1 is 1: 1: 1 o'clock, the result who is produced.Wherein, first hurdle is a wavelength, second hurdle is a backlight B/L dichroism, third column is that blusher colo(u)r filter CF-R sees through dichroism, the 4th hurdle is that green colored filter CF-G sees through dichroism, the 5th hurdle sees through dichroism for blue color filters CF-B, and the 6th hurdle is that ccontaining group of white picture of LCD of liquid crystal sees through dichroism; And ccontaining group of LCD of liquid crystal comprises the combination of materials (comprising liquid crystal layer) of glass and glass the inside.

See also Fig. 7, Fig. 8, Fig. 9, Figure 10 and Figure 11, Fig. 7 is the actual measurement light source dichroism of LED-backlit module light source in the first embodiment of the invention; Fig. 8 be in the first embodiment of the invention under the standard C light source actual measurement dichroism of red-green-blue color optical filter; Fig. 9 is that the calculating of ccontaining group of white picture of liquid crystal in the first embodiment of the invention sees through dichroism; Figure 10 among invention first embodiment under the standard C light source indivedual red-green-blue color optical filters add that the calculating of ccontaining group of white picture of liquid crystal sees through dichroism; Figure 11 in the first embodiment of the invention under the standard C light source all red-green-blue color optical filters add that the calculating of ccontaining group of white picture of liquid crystal sees through dichroism.

Wavelength (nm)	Backlight B/L	Blusher colo(u)r filter CF-R	Green colored filter CF-G	Blue color filters CF-B	Ccontaining group of white picture of LCD of liquid crystal
						700	0.0899	0.9042	0.2122	0.0313	0.4800
690	0.1155	0.8664	0.1543	0.0288	0.5100
						680	0.1462	0.8194	0.1087	0.0274	0.5400
670	0.1826	0.8301	0.0776	0.0259	0.5600
						660	0.2265	0.8874	0.0606	0.0209	0.6000

650	0.2753	0.8895	0.0595	0.0140	0.6200
						640	0.3281	0.8428	0.0682	0.0085	0.6600
630	0.3572	0.8358	0.0796	0.0051	0.6900
						620	0.3202	0.8073	0.1093	0.0034	0.7200
610	0.2943	0.7781	0.1857	0.0030	0.7600
						600	0.2991	0.8152	0.3203	0.0038	0.7800
590	0.3401	0.6644	0.4616	0.0057	0.8200
						580	0.4004	0.2703	0.5705	0.0095	0.8500
570	0.4550	0.0199	0.6366	0.0166	0.8800
						560	0.4544	0.0032	0.7123	0.0352	0.9100
550	0.4722	0.0022	0.7623	0.0780	0.9300
						540	0.4917	0.0065	0.7716	0.1469	0.9500
530	0.4931	0.0164	0.7846	0.2342	0.9700
						520	0.4970	0.0113	0.7823	0.3560	0.9800
510	0.3922	0.0051	0.7496	0.4881	0.9900
						500	0.2977	0.0044	0.6626	0.5830	0.9800
490	0.3127	0.0052	0.5820	0.6638	0.9700
						480	0.5329	0.0060	0.3453	0.7128	0.9500
470	1.0000	0.0050	0.0722	0.7290	0.9200
						460	0.9874	0.0054	0.0139	0.7196	0.8700
450	0.9615	0.0068	0.0110	0.7366	0.8000
						440	0.5135	0.0112	0.0104	0.6999	0.7200
430	0.1324	0.0180	0.0061	0.6560	0.6200
						420	0.0317	0.0318	0.0113	0.6365	0.5000
410	0.0107	0.0587	0.0193	0.6320	0.3800
						400	0.0079	0.0987	0.0375	0.5455	0.2600

The dichroism of ccontaining group of white picture of table 2 backlight, colored filter and liquid crystal

See also table 3, it has wherein used some parameters, according to this corrected Calculation value for according to the data of table 2, Fig. 7, Fig. 8, Fig. 9, Figure 10 and Figure 11 and via the result that the inventive method calculated.Liquid Crystal Module LCM in the table 3 comprises Polarizer, following Polarizer, upper phase difference plate, the next phase difference plate, liquid crystal ccontaining group of LCD, backlight and electric loop.When the white picture briliancy of Liquid Crystal Module LCM is maximum divided by the ratio of deceiving the picture briliancy, represent this white picture (light in RGB this moment (RGB) zone all can pass through) with LCM-W, and can utilize calculating or measurement to obtain its colourity, transmitance or briliancy numerical value.If only allow red (R) regional light of Liquid Crystal Module LCM pass through, and the light in green (G) zone and blue (B) zone does not pass through, and then represents the red picture of this Liquid Crystal Module LCM with LCM-R.In like manner, represent the green picture of Liquid Crystal Module LCM, and represent the blue picture of Liquid Crystal Module LCM with LCM-B with LCM-G.And chromaticity coordinate is represented in the combination of x and y; Y is the Y values.

	x	y	Y	Briliancy	The NTSC ratio
						Backlight	0.280	0.294	-	5300	-
CF-R	0.633	0.347	21.96	-	54.49％
						CF-G	0.315	0.563	57.43	-
CF-B	0.140	0.141	15.94	-
						LCM-R	0.571	0.355	14.20	48	48.22％
LCM-G	0.313	0.569	54.11	184
						LCM-B	0.152	0.111	15.87	54
LCM-W	0.272	0.334	28.06	-
						LCM-W	0.286	0.319	-	287	-

Table 3 estimation results

The method of present embodiment is not that complete Theory is calculated, and some is that measurement result in kind and Theoretical Calculation comparison are as a result obtained parameter, utilizes parameter revised theory result of calculation then.Wherein, the measured value of briliancy backlight is 5300 (cd/m2); Briliancy measured value (at this moment, Liquid Crystal Module LCM shows white picture) behind this backlight process Liquid Crystal Module LCM is 287 (cd/m2); Via the Y values of calculating resulting Liquid Crystal Module is 28.06.But, done in the above calculating partly to simplify, for example, transmitance of Polarizer, glass, dielectric film, alignment film, liquid crystal or the like, and exclude calculating (transmitance all is used as 100% earlier), and for processing procedure stable, material can not changed arbitrarily, therefore, and the calculating of these simplification, replace with a parameter, also do not have big error.Particularly, can obtain result of calculation after simplifying calculating, Liquid Crystal Module white colourity LCM-W is (0.272,0.334), and the Y values is 28.06.The measurement result that contrast is in kind, briliancy backlight is 5300 (cd/m2), the white colourity LCM-W of Liquid Crystal Module actual measurement is (0.286,0.319), and white picture briliancy is 287 (cd/m2).At this, set the usefulness of 3 parameters as correction: one, 5300*28.06*U=287 → U=0.00193, its two, 0.272*V=0.286 → V=1.051, its three, 0.334*W=0.319 → W=0.955.Based on these data, if LCD has different design architectures, or different colourity requirements is arranged, as long as do not change material, this U, V and W parameter still are suitable for.

In table 3, the calculating Y values of the red picture LCM-R of Liquid Crystal Module is 14.20, and the calculating Y values of the green picture LCM-G of Liquid Crystal Module is 54.11, and the calculating Y values of the blue picture LCM-B of Liquid Crystal Module is 15.87.According to the calculating Y values ratio of Liquid Crystal Module RGB picture 14.20: 54.11: 15.87, and multiply by the measurement briliancy 287 (cd/m2) of white picture, therefore, can obtain the briliancy estimated value of the RGB picture of Liquid Crystal Module, its briliancy estimated value is respectively 48,184 and 54 (cd/m2).

Among this first embodiment,, during y=0.31,, and use the computer program loop computation that has designed via artificial judgement if white picture colourity desired value is x=0.31; So, obtain in each pixel of ccontaining group of LCD of liquid crystal the area ratio of red pixel R1, green pixel G1 and blue time pixel B 1, this area ratio is designed to, red area: green area: blue area=1.52: 0.92: 1.05; Also even summation is 1, then red area: green area: blue area=43.5%: 26.4%: 30.1%.

In addition, the Fig. 3 from background technology, Fig. 4 and Fig. 5 as can be known, existing design example is difficult to solve the problem of misalignment.So application the technology of the present invention, at first set white picture the target chromatic value (x, y); Then, set in each pixel the area ratio of red pixel R1, green pixel G1 and blue time pixel B 1; Then, calculate the dichroism of the ccontaining group of white picture of LCD of liquid crystal, and produce dichroism as table 2; Then, utilize actual measurement and calculate, produce design load as table 3; So cycle sets area ratio and simulation trial just can be tried to achieve the area ratio of needed red pixel R1, green pixel G1 and blue time pixel B 1, to overcome the misalignment problem that has design example now.

The method of the shown chromaticity coordinate of above-mentioned adjustment through mode ray machine is also applicable to adjusting the shown chromaticity coordinate of reflective ray machine.The design chromaticity coordinate that this moment, institute's desire produced is a reflection chromaticity coordinate; Then, set up a light source dichroism, this is the light source dichroism of a reflection with light source; Then, set up a reflection beam splitting characteristic, this is a reflection beam splitting characteristic of utilizing an incident light, a blusher colo(u)r filter, a green colored filter, a blue color filters and a reflective ray machine to try to achieve; Then, produce the reflection chromaticity coordinate.And incident light is from reflection light source, standard sources or selected light source.

In addition, the colored method of expression has many kinds, for example RGB (RGB) model, tone saturation intensity (HSI) model, Lab model and CMYK model or the like, the inventive method also is applicable to the adjustment of each color element in these color models (for example tone (Hue)), is not limited to the adjustment of chromaticity coordinate.

Characteristics of the present invention are: a kind of method for designing of image module and use the LCD of this method, by formulating a target chromatic value, via the area configuration of adjusting one red pixel, one green pixel and one blue pixel in each pixel, and according to the optical characteristics of LCD component part, emulation and computing in addition, to produce a design chromatic value, one red pixel, one green pixel and the area configuration of one blue pixel and the simulation calculating of optical characteristics are adjusted in each pixel in circulation then, make the design chromatic value of generation can be near the target chromatic value.So, can adjust the color of LCD, and solve the problem of misalignment.

In sum, the method for designing of image module provided by the invention and use the LCD of this method can reach the effect that the invention conception sets really.And the above person is preferred embodiment of the present invention only, and the patented technology personnel in this area that the present invention relates to such as modifying according to the equivalence of being done under the spirit of the present invention or changing, all should be covered by within the protection domain of the presently claimed invention.

Claims (11)

1. the method for designing of an image module is characterised in that, comprises the following steps:

A. formulate a target chromatic value;

B. set the area configuration of one red pixel in each pixel, one green pixel and one blue pixel;

C. simulate and produce a design chromatic value;

D. this target chromatic value and this design chromatic value relatively; And

E. repeating step b is to steps d, and the error between this target chromatic value and this design chromatic value is in an error amount.

2. the method for designing of image module as claimed in claim 1 is characterized in that, the end at step a also comprises the following steps:

A1. setting this target chromatic value is a target chromaticity coordinate; And

Step c comprises the following steps:

C1. setting this design chromatic value is a design chromaticity coordinate; And

C2. produce this design chromaticity coordinate, this design chromaticity coordinate is an one through a chromaticity coordinate and a reflection chromaticity coordinate.

3. the method for designing of image module as claimed in claim 2 is characterized in that, described step c2 comprises the following steps:

C21. this design chromaticity coordinate of setting the desire generation was for seeing through chromaticity coordinate;

C22. set up a light source dichroism;

C23. set up one and see through dichroism; And

C24. produce and to see through chromaticity coordinate.

4. the method for designing of image module as claimed in claim 3 is characterized in that, described step c22 comprises the following steps:

C221. set up this light source dichroism of a backlight module light source; And

Step c23 comprises the following steps:

C231. on one first glass substrate, make a blusher colo(u)r filter, pass this blusher colo(u)r filter, measure generations-red optical filter through dichroism by-incident light;

C232. on one second glass substrate, make a green colored filter, pass this green colored filter, measure and produce a green optical filter through dichroism by this incident light;

C233. on one the 3rd glass substrate, make a blue color filters, pass this blue color filters, measure and produce a blue optical filter through dichroism by this incident light;

C234. utilize this incident light to pass a through mode ray machine, produce a ray machine and see through dichroism;

C235. utilize this red optical filter to see through dichroism through dichroism, this indigo plant optical filter through dichroism and this ray machine, produce and be somebody's turn to do through dichroism through dichroism, this green optical filter;

Wherein step c234 comprises the following steps:

C2341. set up this incident light and pass a mathematical model of this through mode ray machine and at least one parameter in this mathematical model;

C2342. utilize a theoretical value transmittance curve and the measured value transmittance curve of at least one embodiment and each this embodiment, these parameters of regression Calculation; And

C2343. according to these parameters, produce this ray machine and see through dichroism, wherein this through mode ray machine comprises Polarizer, a Polarizer on ccontaining group of the liquid crystal and of not switching on;

Step c2342 comprises the following steps:

C23421. pass ccontaining group of this time Polarizer, this liquid crystal of not switching on and one first embodiment that should go up Polarizer in regular turn by this incident light, analyze this theoretical value transmittance curve that produces this first embodiment, measure this measured value transmittance curve that produces this first embodiment; And

C23422. by this theoretical value transmittance curve of this first embodiment and this measured value transmittance curve of this first embodiment, the ccontaining group of parameter of at least one liquid crystal of not switching in these parameters of regression Calculation.

5. the method for designing of image module as claimed in claim 4 is characterized in that, wherein:

This through mode ray machine more comprises a phasic difference plate, and also comprises the following steps: at the end of step c23422

C23423. pass this time Polarizer, this phasic difference plate and one second embodiment that should go up Polarizer in regular turn by this incident light, analyze this theoretical value transmittance curve that produces this second embodiment, measure this measured value transmittance curve that produces this second embodiment; And

C23424. by this theoretical value transmittance curve of this second embodiment and this measured value transmittance curve of this second embodiment, at least one phasic difference board parameter in these parameters of regression Calculation;

This through mode ray machine more comprises liquid crystal coating phasic difference plate, and also comprises the following steps: at the end of step c23422

C23425. utilize this incident light to pass this time Polarizer, this liquid crystal coating phasic difference plate and one the 3rd embodiment that should go up Polarizer in regular turn, analyze this theoretical value transmittance curve that produces the 3rd embodiment, measure this measured value transmittance curve that produces the 3rd embodiment; And

C23426. by this theoretical value transmittance curve of the 3rd embodiment and this measured value transmittance curve of the 3rd embodiment, at least one liquid crystal in these parameters of regression Calculation is coated with the phasic difference board parameter;

This through mode ray machine more comprises the N layer liquid crystal of a white picture and a black picture one, once a phasic difference plate and a upper phase difference plate, and also comprises the following steps: at the end of step c23422

C23427. utilize this incident light to pass this time Polarizer, the next phase difference plate, this white picture and the N layer liquid crystal that is somebody's turn to do black picture one, upper phase difference plate and one the 4th embodiment that should go up Polarizer in regular turn, analyze this theoretical value transmittance curve that produces the 4th embodiment, measure this measured value transmittance curve that produces the 4th embodiment; And

C23428. by this theoretical value transmittance curve of the 4th embodiment and this measured value transmittance curve of the 4th embodiment, the ccontaining group of pictures parameter of at least one liquid crystal in these parameters of regression Calculation; Or

Before step c23421, also comprise the following steps: to set this liquid crystal and comprise a liquid crystal layer for ccontaining group.

6. the method for designing of image module as claimed in claim 4 is characterized in that, also comprises the following steps: before step c231

Set this incident light from this backlight module light source.

7. the method for designing of image module as claimed in claim 3 is characterized in that, step c24 comprises the following steps:

C241. utilize this light source dichroism and should see through dichroism, produce an X values, a Y values and a Z values; And

C242. utilize this X values, this Y values and this Z values, produce and to see through chromaticity coordinate.

8. the method for designing of image module as claimed in claim 7 is characterized in that, wherein:

Comprise the following steps: also that between step c241 and step c242 actual measurement produces one first coefficient, revises this Y values; And/or

Comprise the following steps: also that at the end of step c242 actual measurement produces at least one second coefficient, revise and to see through chromaticity coordinate.

9. the method for designing of image module as claimed in claim 2 is characterized in that, step c2 comprises the following steps:

Cc21. this design chromaticity coordinate of setting the desire generation is this reflection chromaticity coordinate;

Cc22. set up a light source dichroism;

Cc23. set up a reflection beam splitting characteristic; And

Cc24. produce this reflection chromaticity coordinate.

10. the method for designing of image module as claimed in claim 9 is characterized in that, step cc22 comprises the following steps:

Cc221. set up a reflection this light source dichroism with light source; And

Step cc23 comprises the following steps:

Cc23 1. utilizes an incident light, a blusher colo(u)r filter, a green colored filter, a blue color filters and a reflective ray machine, sets up this reflection beam splitting characteristic;

Wherein before step cc231, also comprise the following steps: to set this incident light from this reflection light source.

11. a LCD is characterized in that, comprises an image module, this image module is designed according to the arbitrary described method in the claim 1 to 10.

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