CN100432789C - Blue composition for color filter, color filter, and color image display device - Google Patents

Abstract

There are provided a blue color composition for color filter, a color filter, and a color image display device capable of realizing an image of high purity. A color image display device is formed by a combination of an optic shutter, a color filter having at least three color elements: red, green, and blue corresponding to the optic shutter, and a backlight for transmission lighting. The backlight includes an LED in its structure. When the wavelength of the visible light range 380 to 780 nm for each 5 nm is lambdannm, the spectral transmittance (%) at the wavelength lambdannm by the red color pixel of the color filter is T<R>(lambdan), and the relative light emission intensity normalized by the entire light emission intensity at the wavelength lambdannm from the backlight is I(lambdan), these satisfy the condition (1) as follows: I(620 - 680) x T<R>(620 - 680) >= 1.1(1).

Description

Color filter blue composition, color filter and color image display device

Technical field

The present invention relates to a kind of color filter blue composition, color filter and color image display device.More particularly, the present invention relates to a kind of like this color filter blue composition, described color filter usefulness blue composition can be realized the image of high color purity corresponding to the emission wavelength of improved LED-backlit; The invention still further relates to color filter and color image display device.

Background technology

In recent years, not only expect liquid crystal display cells is applied in the existing personal computer displays, and expectation is applied in the general color television.The colour gamut of color liquid crystal display device is determined by the colourity of the light of redness, green and blue pixel emission, the chroma point of each colour element (x in CIE XYZ colour system _R, y _R), (x _G, y _G), (x _B, y _B) when representing, colour gamut is represented with the leg-of-mutton area that these three points in the x-y chromatic diagram are surrounded.That is to say that this leg-of-mutton area is big more, the coloured image that display element reproduces is lively more.By the three primary colors promptly red (0.67 in the defined modular system of NTSC (NTSC), 0.33), green (0.21,0.71) and blue (0.14,0.08) three points form the benchmark triangles, usually recently represent above-mentioned leg-of-mutton area (after this unit: % abbreviates " NTSC number percent " as) with above-mentioned leg-of-mutton area and the leg-of-mutton area of this benchmark.Common notebook has this value of about 40%～50%, and desktop computer displays has 50%～60% value, and existing LCD TV has this value of about 70%.

The backlight composition of using the color image display device of this color liquid crystal display device mainly to be used by the light valve that utilizes liquid crystal, the color filter with redness, green and blue pixel and transillumination is by the transmitted spectrum decision by emission wavelength backlight and color filter of the colourity of the light of red, green and blue pixel emission.

In color liquid crystal display device, color filter only extracts the wavelength in required zone from luminescence distribution backlight, so that redness, green and blue pixel to be provided.

The preparation method of this color filter that proposes comprises for example methods such as decoration method, pigment dispersing method, electrodeposition process, print process, ink-jet method at present.Past uses dyestuff to make the painted colorant of using usually, but considers from reliability and persistent angle as liquid crystal display cells, uses pigment now.Therefore, consider that from the angle of production efficiency and performance the most common use pigment dispersing method is as the method for preparing color filter now.Usually, under the situation of using same colorant, NTSC number percent and brightness are the relations of these disappear those long (trade-off), can use rightly according to purposes.

On the other hand, generally the backlight of use is, it makes light source with the cold-cathode fluorescence lamp of emission wavelength in redness, green and blue wavelength region, and the light of this cold-cathode fluorescence lamp being launched by light guide plate converts white area source to.Bring into use LED in recent years, because its life-span is long, do not need current transformer (inverter), the brightness that provides is high and not mercurous.

Conventional LED-backlit is used the blue light of LED emission and is used this blue light to excite the yellow phosphor that obtains as white area source.

But above-mentioned light source uses yellow phosphor, like this, from red and green excitation angle, launch many have the light of unwanted wavelength, be difficult to obtain the display board of high colour gamut (highgamut).As countermeasure, can not need the light of wavelength on the principle with the color filter amputation, to increase red and green excitation, still, most of light of backlight emission is by amputation, and brightness significantly reduces like this.Particularly, in the time of in this way, emitting red light will significantly reduce, and therefore in fact can not reveal strong redness again.And the emission wavelength of LED distributes and has following feature: distribute with the emission wavelength of cold-cathode fluorescence lamp and compare, at 460nm～480nm scope inner glow intensity height.The light of this wavelength region may makes the excitation variation of blue pixel, thereby need be with blue color filter as much as possible with its amputation.But, conventional color filter does not have the performance of the light of the 460nm of amputation fully～480nm wavelength with blue composition (after this abbreviating blue composition or blue resist sometimes as) and color filter, therefore not too is suitable for using LED to make color image display device backlight.

In order to overcome this problem, the method (non-patent literature 1) of the LED of combined transmit redness, green and blue light has been proposed in recent years, manufactured experimently out display board in this way with high colour gamut.But, because redness, green and blue led chip will be assembled individually, so there is following problem: 1) inconvenience is installed, 2) layout of redness, green and blue led chip distance is limited, need each led chip will grow like this to the distance of light guide plate, so that be enough to mix the luminous color of each led chip and 3) with each led chip combination of integral multiple number to regulate white colourity, so can not regulate white balance continuously.

Non-patent literature 1:Monthly DISPLAY, in April, 2003, the 42nd～46 page

Summary of the invention

The problem to be solved in the present invention

In this case, the purpose of this invention is to provide a kind of like this color image display device: even when using LED-backlit, also can not sacrifice the brightness of image and realize the reproduction of peony and green image, use is corresponding to above-mentioned peony and green blue resist and color filter, can on entire image, obtain wide colour gamut, and use a chip can obtain redness, green and blue-light-emitting, thereby do not damage the production efficiency when installing, and can easily regulate white balance.

The means that address this problem

The inventor studies in great detail, found that, by improving emission wavelength backlight and the adjusting color filter transmissivity corresponding to this backlight luminescence wavelength, can realize having the image of high color purity.Finished the present invention based on above-mentioned discovery, the invention provides following (A)～(K).

(A) a kind of color filter blue composition, described blue composition comprises adhesive resin (a) and/or monomer (b) and colorant (c), wherein, 5nm wavelength place, every interval in 460nm～480nm scope, the mean value T of the spectral-transmission favtor of the cured product of described blue composition ^B(460-480) (%) is at the most 65%.

(B) a kind of color filter, described color filter have the pixel of using above-mentioned (A) defined color filter to form with blue composition.

(C) a kind of color image display device, described color image display device uses above-mentioned (B) defined color filter and forms.

(D) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, describedly backlightly in its structure, contain LED, and, work as λ _nNm is illustrated in the wavelength of every interval 5nm in the visible-range of 380nm～780nm, T ^R(λ _n) represent that the red pixel of this color filter is in wavelength X _nThe spectral-transmission favtor at nm place (%), I (λ _n) expression from backlight in wavelength X _nDuring the relative luminous intensity of the total luminous intensity standardization of quilt at nm place, these parameters satisfy following condition (1):

I(620-680)×T ^R(620-680)≥1.1 (1)

T wherein ^R(620-680) and I (620-680) be illustrated respectively in 620nm≤λ _nThe all relative luminous intensity of the average transmittance at≤680nm place (%) peace, I (λ _n) be defined as follows:

$s\left({\mathrm{\&lambda;}}_n\right)=\frac{{\&Integral;}_{{\mathrm{\&lambda;}}_n-\mathrm{\&Delta;\&lambda;}/2}^{{\mathrm{\&lambda;}}_n-\mathrm{\&Delta;\&lambda;}/2}s\left(\mathrm{\&lambda;}\right)\mathrm{d\&lambda;}}{\mathrm{\&Delta;\&lambda;}}$

$I\left({\mathrm{\&lambda;}}_n\right)=\frac{s\left({\mathrm{\&lambda;}}_n\right)}{\underset{\mathrm{\&lambda;}=380}{\overset{780}{\mathrm{\&Sigma;}}}s\left({\mathrm{\&lambda;}}_n\right)}$

In the formula, S (λ) expression is from the measured value of luminous intensity in af at wavelength lambda backlight, Δ λ=5nm.

(E) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound by following formula (3) expression:

Eu _aCa _bSr _cM _dS _e (3)

Wherein M represents to be selected from least a element of Ba, Mg and Zn, and a～e is respectively the numerical value in the following scope:

0.0002≤a≤0.02

0.3≤b≤0.9998

D is 0≤d≤0.1

a+b+c+d＝1

0.9≤e≤1.1

(F) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain and contain element M at least ⁴, elements A, element D, element E and element X compound (wherein, M ⁴Be a kind of or at least two kinds of elements that are selected from the group of being made up of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb, and contain Eu at least, A is selected from by being different from element M ⁴The group formed of divalent metal element in a kind of or at least two kinds of elements, D is a kind of or at least two kinds of elements that are selected from the group of being made up of the tetravalent metal element, E is a kind of or at least two kinds of elements that are selected from the group of being made up of trivalent metallic element, and X is a kind of or at least two kinds of elements that are selected from the group of being made up of O, N and F.)

(G) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein saidly backlightly in its structure, contain LED, and, work as λ _nNm is illustrated in the wavelength of every interval 5nm in 380nm～780nm visible-range, T ^G(λ _n) expression by the green pixel of this color filter in wavelength X _nThe spectral-transmission favtor at nm place (%), I (λ _n) expression from backlight in wavelength X _nDuring the relative luminous intensity of the total luminous intensity standardization of quilt at nm place, these parameters satisfy following condition (5) and (6):

I(500-530)×T ^G(500-530)≥1.2 (5)

T ^G(580-600)≥20％ (6)

T wherein ^G(500-530), T ^G(580-600) and I (500-530) be illustrated respectively in 500nm≤λ _n≤ 530nm and 580nm≤λ _nThe average transmittance at≤600nm place (%) and at 500nm≤λ _nThe average relative luminous intensity at≤530nm place, I (λ _n) identical with the definition in above-mentioned (D).

(H) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound by following formula (7) expression, described compound comprises the composite oxides that contain divalence, trivalent and tetravalent metal element and makes fertile material, contains Ce in the described fertile material at least as the activator element:

M ¹ _a’M ² _b’M ³ _c’O _d’ (7)

M wherein ¹, M ²And M ³Represent divalent metal element, trivalent metallic element and tetravalent metal element respectively, a '～d ' is respectively the numerical value in the following scope:

2.7≤a’≤3.3

1.8≤b’≤2.2

2.7≤c’≤3.3

11.0≤d’≤13.0

(I) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound by following formula (8) expression:

M ⁵ _kM ⁶ ₁M ⁷ _mO _n (8)

M wherein ⁵, M ⁶And M ⁷Expression contains activator element, divalent metal element and the trivalent metallic element of Ce at least respectively, and k～n is respectively the numerical value in the following scope:

0.0001≤k≤0.2

0.8≤1≤1.2

1.6≤m≤2.4

3.2≤n≤4.8

(J) as each described color image display device in above-mentioned (A)～(F), described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, be used for the combination that described light source backlight comprises blueness or mazarine LED and phosphor, and in each wavelength region may of 430nm～470nm, 500nm～540nm and 600nm～680nm, all have at least a luminous major constituent.

(K) a kind of color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, be used for the combination that described light source backlight comprises blueness or mazarine LED and phosphor, and all have at least a luminous major constituent in each wavelength region may of 430nm～470nm, 500nm～540nm and 600nm～680nm, the NTSC number percent of the colour gamut of coloured image display element is at least 60%.

Effect of the present invention

According to color liquid crystal display arrangement of the present invention, a kind of like this color liquid crystal display arrangement can be provided: even when using LED-backlit, also can not sacrifice the brightness of image and realize the reproduction of peony and green image, can on entire image, obtain high colour gamut, and just can obtain redness, green and blue-light-emitting with a chip, thereby do not damage the production efficiency when installing, can easily regulate white balance.

Description of drawings

Fig. 1 is the figure of the structure of expression TFT type color liquid crystal display arrangement.

Fig. 2 is the cut-open view that expression is fit to an example of back lighting device of the present invention.

Fig. 3 is the cut-open view that is fit to another example of back lighting device of the present invention.

Fig. 4 is backlight 1 the relative luminescent spectrum that preparation example 1 obtains.

Fig. 5 is backlight 2 the relative luminescent spectrum that preparation example 2 obtains.

Fig. 6 is backlight 3 the relative luminescent spectrum that preparation example 3 obtains.

Fig. 7 is backlight 4 the relative luminescent spectrum that preparation example 4 obtains.

Fig. 8 is backlight 5 the relative luminescent spectrum that preparation example 5 obtains.

Fig. 9 is backlight 6 the relative luminescent spectrum that preparation example 6 obtains.

Symbol description

1 light emitting diode

2 light guide plate

3 light diffusing sheets

4,10 Polarizers

5,8 glass substrates

6 TFT

7 liquid crystal

9 color filters

11 light conductors

12 arrays

13 light modulation sheets

14,14 ' light extraction means

15 reflector plates

Embodiment

The embodiment of color filter of the present invention with blue composition, color filter and color liquid crystal display arrangement is described below.These are examples of embodiment of the present invention, and the present invention is not limited to them.

(1) color filter blue composition

Color filter blue composition of the present invention is the color filter blue composition that comprises adhesive resin (a) and/or monomer (b) and colorant (c), it is characterized in that, the wavelength place of every interval 5nm in the visible-range of 460nm～480nm, the mean value T of the spectral-transmission favtor of the cured product of this color filter usefulness blue composition ^B(460-480) (%) is at the most 65%.

Cured product with blue composition of the present invention of above-mentioned averaged spectrum transmissivity feature can shield the extra wavelength of the distinctive blue region of LED-backlit, can also improve the wide colour gamut of the described color image display device of the present invention of (3) chapter.T ^B(460-480) be preferably at the most 60%, more preferably at the most 58%.And it is generally at least 1%.If T ^B(460-480) too high, then the light of the distinctive extra wavelength of LED-backlit will damage colour gamut like this with transmissive.In addition, if it is too low, what for extremely will reduce as near the optical transmission rate the 450nm of blue major constituent, thereby the brightness of reduction blue pixel.

There is no particular limitation to the composition of blue composition of the present invention, just passable as long as blue composition has above-mentioned averaged spectrum transmissivity feature, still can guarantee this feature with following concrete means.

That is to say, contain dioxazine violet pigment and/or copper phthalocyanine and make the blue composition of colorant (c) and have above-mentioned averaged spectrum transmissivity feature.

Dioxazine violet pigment for example is the pigment of following face item number." C.I " represents pigment index (C.I.).

C.I. pigment Violet 23,19 etc.

Copper phthalocyanine for example is the pigment of following face item number.

C.I. pigment blue 15: 6,15:3,15:2 etc.

The content of ， dioxazine violet pigment in all blue pigments is generally at least 25 weight % in addition, preferably at least 30 weight %, more preferably at least 35 weight %.And it is generally 90 weight % at the most.If the content of dioxazine violet pigment is too low, T ^BTo be too high (460-480), thereby will obtain too green blueness, thereby reduce excitation.In addition, if this content is too high, so will be too low as near the optical transmission rate the 450nm of blue light major constituent, thus the brightness of reduction blue pixel.

In addition, the content of copper phthalocyanine in all pigment is generally at least 10 weight %.And it is generally 75 weight % at the most, preferred 70 weight % at the most, more preferably 65 weight % at the most.If the content of copper phthalocyanine is too low, pixel will provide blue inadequately color so, thereby reduce excitation.In addition, if this content is too high, T so ^B(460480) will be too high, thereby obtain too green blueness, thereby reduce excitation.

In addition the ratio of the content of the content of ， dioxazine violet pigment and copper phthalocyanine be generally 25: 75～75: 25, preferred 30: 70～70: 30, more preferably 35: 65～65: 35.If compare the amount of ， dioxazine violet pigment with the amount of copper phthalocyanine too big, so will be too low as near the optical transmission rate the 450nm of blue light major constituent, thus the brightness of reduction blue pixel.In addition, if compare the amount of ， dioxazine violet pigment with the amount of copper phthalocyanine too little, T so ^BTo be too high (460-480), thereby obtain too green blueness, thereby reduce excitation.

Constituting that other components of blue composition of the present invention and its preparation method wait will be the

(3-4) describe in the chapter (color filter composition).

(2) color filter

Color filter of the present invention is characterised in that it has the pixel that is formed by above-mentioned blue composition.Color filter of the present invention can shield the extra wavelength of the distinctive blue region of LED-backlit, can also improve the wide colour gamut of the described color image display device of the present invention of (3) chapter.Like this, the wavelength place of every interval 5nm in the visible-range of 460nm～480nm, the mean value T of the spectral-transmission favtor of the blue pixel of color filter of the present invention ^B(460-480) (%) is generally at the most 65%, and preferably at the most 60%, more preferably at the most 58%.And it is generally at least 1%.If T ^B(460-480) too high, the light of the distinctive extra wavelength of LED-backlit is transmissive so, thus the infringement colour gamut.In addition,, will reduce so even as near the optical transmission rate the 450nm of blue major constituent if it is too low, thus the brightness of reduction blue pixel.

In addition, when preparation color filter of the present invention, described blue composition preferably contains dioxazine violet pigment, and the content of dioxazine violet pigment is as (1) Zhang Suoshu.

In addition, ， dioxazine violet pigment preferably satisfies following formula with respect to the content V (%) and the dried film thickness T (μ m) of total solid composition in this case:

VT≥10

VT is preferably at least 11, and more preferably at least 12, it is generally at the most 90.If the value of VT is too little, so T ^BTo be too high (460-480), thereby obtain too green blueness, thereby reduce excitation,, then will reduce as near the optical transmission rate the 450nm of blue major constituent if the value of being somebody's turn to do is too high, thus the brightness of reduction blue pixel.

Constituting other components of color filter of the present invention and its preparation method etc. will describe in (3-3) chapter (color filter).

(3) color image display device

Explain color image display device of the present invention now.

Color image display device of the present invention comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, and its concrete structure is not particularly limited.For example, can mention TFT type color liquid crystal display arrangement as shown in Figure 1, light valve wherein uses liquid crystal.

Fig. 1 represents to use an example of TFT (thin film transistor (TFT)) the type color liquid crystal display arrangement of side light type backlight device and color filter.In this liquid crystal indicator, converted to area source by the light of light source 1 emission by light guide plate 2, further improve the homogeneity of light by light diffusing sheet 3, light enters Polarizer 4 after by prismatic lens then.For this incident light, control polarization direction in each pixel with TFT6, this light incides in the color filter 9 afterwards.At last, this light reaches the observer then by with the Polarizer 10 of polarization direction perpendicular to the polarization direction setting of Polarizer 4.The intensity of variation of the polarization direction of this incident light changes according to the voltage that imposes on TFT6, to change light quantity by Polarizer 10, and like this can color display.Mark 5 and 8 expression transparency carriers (glass substrate), 7 expression liquid crystal.

In addition, color image display device of the present invention is characterised in that to have wide colour gamut by the structure that describes in further detail below.That is to say, color image display device of the present invention comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, described color image display device is characterised in that, be used for the combination that light source backlight comprises blueness or mazarine LED and phosphor, and in each wavelength region may of 430nm～470nm, 500nm～540nm and 600nm～680nm, all having at least a luminous major constituent, the NTSC number percent of the colour gamut of coloured image display element is at least 60%.NTSC number percent is preferably at least 70%.

In addition, the colour temperature of color image display device of the present invention is generally 5,000K～10, and 000K, preferred 5,500K～9,500K, more preferably 6,000K～9,000K.If colour temperature is too low, with the image that is taken on a red color on the whole, if colour temperature is too high, then brightness will reduce.

(3-1) back lighting device

At first, explained later is used in the structure of the back lighting device in the above-mentioned color liquid crystal display arrangement.

Back lighting device used in this invention is a kind of planar light source device, and this planar light source device is arranged in the back side of liquid crystal board, as the backlight device of transmission-type or semi transmission type colour liquid crystal display device.

The structure of back lighting device comprises the LED that launches white light and converts this light source light to the almost Optical homogenizer spare of the area source of homogeneous.

The exemplary of configured light sources mode comprises, light source directly is configured in the method (direct backlight mode) of liquid crystal cell lower rear, with light source is placed on the side, for example using, light transmission light conductor such as acrylic resin board converts this light to planar method (sidelight mode) to obtain area source.In them, the sidelight mode shown in Fig. 2 and 3 is suitable as the area source of thin and Luminance Distribution homogeneity excellence, and this mode practical application is the most extensive at present.

Constituting of the back lighting device of Fig. 2 along the side end face 11a configuration that is light conductor 11 by the dull and stereotyped substrate that forms of light transmission, makes light from incide the inside of light conductor 11 as a side end face 11a of light receiving surface light emitting diode 1.A surperficial 11b of light conductor 11 serves as light-emitting face, and configuration is formed with the light modulation sheet 13 of the array 12 of approximate prism shape on this light-emitting face 11b, and the drift angle of array 12 points to the observer.With another face 11c opposite of light conductor 11 with light-emitting face 11b on configuration light extraction mechanism 14, adopt light scattering printing ink press predetermined pattern and print a plurality of somes 14a, thereby form described light extraction mechanism 14.In this face 11c side, arrange reflector plate 15 near this face 11c.

Back lighting device with the same configuration pie graph 3 of back lighting device shown in Figure 2, different is, configuration is formed with the light modulation sheet 13 of the prism array 12 of approximate prism shape, make the light-emitting face 11b of the drift angle sensing light conductor 11 of array 12, and the light extraction means 14 ' that is configured on the face 11c opposite with the light-emitting face 11b of light conductor 11 comprises the coarse patterns 14b that each surface all forms rough surface.

By using the back lighting device of above-mentioned sidelight mode, can more effectively embody the light weight of liquid crystal indicator and slim characteristics.

The light source of back lighting device of the present invention is characterised in that and contains LED (after this can be described as light emitting diode sometimes) in its structure.This light source generally can use the light source of any kind, is the luminous of 580nm～700nm, 500nm～550nm and 400nm～480nm scope as long as redness, green and blue wavelength region can be provided.

In order to make this condition that satisfies backlight, can mention following method: light source comprises the combination of blueness or mazarine LED and phosphor, regulate this light source, make at red area (common 600nm～680nm, preferred 610nm～680nm, more preferably 620nm～680nm), green area (500nm～540nm usually, preferred 500nm～530nm, more preferably (430nm～470nm usually has at least a luminous major constituent in each wavelength region may of preferred 440nm～460nm) for 500nm～525nm) and blue region.

In the transmission mode of transmission-type or Semitransmissive, the light quantity in red, green and blue each zone is determined by the product of the spectral-transmission favtor of luminous and color filter backlight.Therefore, need to select the condition of in (c) colorant item of color filter, describing that satisfies backlight with composition.

Now, the object lesson of back lighting device of the present invention is described below, but back light of the present invention is not limited to this, as long as it is just passable to satisfy above-mentioned condition.

Light source is preferably light emitting diode.The emission wavelength of light source is 440nm～490nm, preferred 450nm～480nm.Suitable light source is, for example, and with InGaN, the GaAlN of crystalline growth on the substrate of for example silit, sapphire or gallium nitride etc. such as for example MOCVD (metal-organic chemical vapor deposition equipment) method, InGaAlN, ZnSeS semiconductor etc.Can use a plurality of light sources to obtain high output.In addition, light source can be end face light emitting-type or surface-emitting type laser diode.

The framework of fixed light source has at least and is the positive pole of light source power supply and negative pole.Can on framework, form the spill cover, in the bottom, can make emergent light have directivity light source arrangement, thereby light is utilized effectively.In addition, the inside surface of the concave portions of framework or whole framework can be electroplated with for example silver, platinum or the contour reflective metal of aluminium or the alloy suitable with these metals, thereby can increase the reflectivity of whole visible-range, and can increase the efficient of light.In addition, when the surface of framework concave portions or whole framework with containing the white glass fiber or when for example the resin of the use in injection molding of alumina powder or the contour reflective substance of titania powder is made, also can obtaining identical effect.

For fixed light source, can use epoxies, acid imide, acrylic compounds or other bonding agent or scolder such as AuSn or AgSn for example.When electricity is supplied to light source by bonding agent, preferably thin and be coated on the material of sneaking into electroconductive stuffings such as silver-colored particulate for example in the bonding agent, for example silver paste or carbon paste etc. equably.Particularly, for big current mode light emitting diode or laser diode, its thermal diffusivity is very important, at this moment, effectively uses scolder.In addition, when fixing light source of not switching on by bonding agent, can use any bonding agent, but consider thermal diffusivity, preferred silver paste or scolder.

Light source is connected with tinsel bonding method (wire bonding) with the electrode of framework.Using diameter is that the gold thread of 20 μ m～40 μ m or aluminum steel are as tinsel.Method as the electrode that connects light source and framework also can adopt and not use flip-chip wiry (flip chip) bonding method.

The phosphor of the light of the phosphor of the light of green-emitting wave band and rubescent look wave band is mixed with for example clear binder such as epoxy resin or silicone resin, be coated on the light emitting diode then.Can suitably change blending ratio to obtain needed colourity.In addition, the phosphor of the light of the phosphor of the light of green-emitting wave band and rubescent look wave band can be coated on the light emitting diode individually.When in clear binder, adding spreading agent again, can make emergent light more even.The preferred mean grain size of spreading agent is extremely tens of microns a colourless substance of 100nm.Preferred aluminium oxide, zirconia, yttria etc., this is because they are stable in-60 ℃～120 ℃ serviceability temperature scope.The spreading agent that more preferably has high index of refraction is because the better effects if of this spreading agent.

When applying electricity for the light-emitting device finished product, at first, light emitting diode is launched blue or dark blue coloured light.Phosphor absorbs part light wherein, sends the light of green wave band or red wave band.The light that sends from light-emitting device is the light of white substantially, and this white light is that the primary light of the blue wave band of origin autoluminescence diode is mixed formation with wavelength by the light of the green wave band of phosphor-converted and red wave band.

(3-2) phosphor

The explained later phosphor.In color liquid crystal display arrangement of the present invention, preferred above-mentioned have phosphor layer or phosphor film backlight, this phosphor layer or phosphor film use following phosphor.

(3-2-1) red-emitting phosphor

Red-emitting phosphor as the phosphor layer that is used for color liquid crystal display arrangement of the present invention or phosphor film are used can use the glow peak wavelength at 620nm≤λ _nVarious phosphors in the wavelength coverage of≤680nm.As the red-emitting phosphor of the image of realizing high color purity, preferably with the phosphor of europium activation.Phosphor with the europium activation can be nitride phosphor, oxynitride phosphor, sulphide phosphor or oxysulfide phosphor, in them, and preferred nitride phosphor or oxynitride phosphor.

The object lesson of the preferred red-emitting phosphor of explained later.

(3-2-1-1)

As object lesson, can mention compound by formula (3) expression:

Eu _aCa _bSr _cM _dS _e (3)

Wherein M represents to be selected from least a element of Ba, Mg and Zn, and a～e is the numerical value in the following scope:

0.0002≤a≤0.02

0.3≤b≤0.9998

D is 0≤d≤0.1

a+b+c+d＝1

0.9≤e≤1.1

From the angle of thermal stability, in the formula (3) the formula weight a of Eu preferably in the scope of 0.0002≤a≤0.02, more preferably 0.0004≤a≤0.02.From the angle of temperature characterisitic, in the formula (3) the formula weight a of Eu preferably in the scope of 0.0004≤a≤0.01, more preferably 0.0004≤a≤0.007, more preferably 0.0004≤a≤0.005, more preferably 0.0004≤a≤0.004.

From the angle of luminous intensity, in the formula (3) the formula weight a of Eu preferably in the scope of 0.0004≤a≤0.02, more preferably 0.001≤a≤0.008.If luminescent center ion Eu ²⁺Content too low, luminous intensity can be lower, if too high, because so-called concentration frosting phenomenon, luminous intensity also will reduce.

The scope that satisfies the formula weight a of Eu in the formula (3) of whole thermal stabilitys, temperature characterisitic and luminous intensity preferably in the scope of 0.0004≤a≤0.004, more preferably 0.001≤a≤0.004.

Basic crystal Eu at following formula (3) _aCa _bSr _cM _dS _eIn, the mol ratio of the negative ion position that cation-bit that Eu, Ca, Sr and M occupy and S occupy is 1: 1, but, even when cation defect or anion defect take place a little, target phosphorescence performance is not subjected to appreciable impact yet, therefore, can use the basic crystal of the following formula (3) of mol ratio e in 0.9～1.1 scope of the negative ion position that S occupies.

In the chemical substance of following formula (3), it is optional in the present invention that expression is selected from the M of at least a element of Ba, Mg and Zn, but, even when it is included in the chemical substance of following formula (3) with the mol ratio d of the M in 0≤d≤0.1 scope, also can reach purpose of the present invention.

Even when the chemical substance of following formula (3) contains high element to Eu, Ca, Sr, Ba, Mg, Zn and the S of 1% amount as impurity, in practicality, do not have problems yet.

(3-2-1-2)

In addition, as another example, can mention following compounds.

At least contain element M ⁴, elements A, element D, element E and element X compound (wherein, M ⁴Be to be selected from a kind of or at least two kinds of elements in the group of being made up of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb and to contain Eu at least, A is selected from by being different from element M ⁴The group formed of divalent metal element in a kind of or at least two kinds of elements, D is a kind of or at least two kinds of elements that are selected from the group of being made up of the tetravalent metal element, E is a kind of or at least two kinds of elements that are selected from the group of being made up of trivalent metallic element, and X is a kind of or at least two kinds of elements that are selected from the group of being made up of O, N and F).

Preferred especially above-claimed cpd, this is that probability of damage is lower in use because of light-emitting component, the caused brightness of the variation of light-emitting component serviceability temperature changes little, thereby can obtain the light-emitting component of high brightness and high-color rendering.

In addition, M ⁴Be to be selected from a kind of or at least two kinds of elements in the group of forming by Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb and to contain Eu at least, in them, be preferably a kind of or at least two kinds of elements, the more preferably Eu that are selected from the group of forming by Mn, Ce, Sm, Eu, Tb, Dy, Er and Yb.

A is selected from by being different from element M ⁴The group formed of divalent metal element in a kind of or at least two kinds of elements, in them, be preferably a kind of or at least two kinds of elements, the more preferably Ca that are selected from the group of forming by Mg, Ca, Sr and Ba.

D is a kind of or at least two kinds of elements that are selected from the group of being made up of the tetravalent metal element, in them, is preferably one or both elements that are selected from the group of being made up of Si, Ge, Sn, Ti, Zr and Hf, more preferably Si.

E is a kind of or at least two kinds of elements that are selected from the group of being made up of trivalent metallic element, in them, is preferably one or both elements that are selected from the group of being made up of B, Al, Ga, In, Sc, Y, La, Gd and Lu, more preferably Al.

X is a kind of or at least two kinds of elements that are selected from the group of being made up of O, N and F, in them, is preferably N or N and O.

The object lesson of the composition formula of above-mentioned composition is represented by following formula (4):

M ⁴ _fA _gD _hE _iX _j (4)

Wherein f～j is the numerical value in the following scope:

0.00001≤f≤0.1

f+g＝1

0.5≤h≤4

0.5≤i≤8

0.8×(2/3+4/3×h+i)≤j

j≤1.2×(2/3+4/3×h+i)

F represents the luminescent center element M ⁴Addition, M in the preferred phosphor ⁴With (M ⁴+ A) atomicity is than f (f=M ⁴/ (M ⁴+ A)) be 0.00001～0.1.If should value f less than 0.00001, so as the M of luminescent center ⁴Atomicity little, thereby luminosity will be lower.If should be worth f greater than 0.1, so because M ⁴The concentration delustring will take place in the interference between the ion, has reduced brightness like this.

The special M that works as ⁴During for Eu, consider that from the angle of high luminosity this value f is preferably 0.002～0.03.

The h value representation is the content of element D such as Si for example, and this value is 0.5≤h≤4.Preferred 0.5≤h≤1.8, more preferably h=1.If h is less than 0.5 or greater than 4 for value, luminosity will reduce so.In the scope of 0.5≤h≤1.8, high luminosity will be obtained, when h=1, extra high luminosity will be obtained.

The i value representation is the content of element E such as Al for example, and this value is 0.5≤i≤8.Preferred 0.5≤i≤1.8, more preferably i=1.If i is less than 0.5 or greater than 8 for value, luminosity will reduce so.In 0.5≤i≤1.8 scopes, high luminosity will be obtained, when i=1, extra high luminosity will be obtained.

The j value representation is the content of element X such as N for example, and this value is 0.8 * (2/3+4/3 * h+i)～1.2 * (2/3+4/3 * h+i).More preferably j=3.J is outside this scope the time for value, and luminosity will reduce.

In above-mentioned composition, the preferred composition of high luminosity is a kind of like this mineral compound, wherein, and element M at least ⁴Contain Eu, elements A contains Ca, and element D contains Si, and element E contains Al and element X contains N.Especially, it is a kind of like this mineral compound, wherein, and element M ⁴Be Eu, elements A is Ca, and element D is Si, and element E is that Al and element X are the potpourri of N or N and O.

At element X is that if (molal quantity of O)/(molal quantity of molal quantity+O of N) is too high, luminous intensity will reduce in the situation of potpourri of N or N and O.Consider from the angle of luminous intensity, (molal quantity of O)/(molal quantity of molal quantity+O of N) is preferably at the most 0.5, more preferably at the most 0.3, more preferably at the most 0.1, because will obtain the excitation good red-emitting phosphor of glow peak wavelength in the emission wavelength scope of 640nm～660nm thus.

(3-2-2) green phosphor

Green phosphor as the phosphor layer that is used for color liquid crystal display arrangement of the present invention or phosphor film are used can use the various phosphors of glow peak wavelength in 500nm≤λ n≤530nm wavelength coverage.Realize that this green phosphor of the image of high color purity preferably contains the phosphor of useful cerium and/or europium activation.Phosphor with cerium and/or europium activation can be oxide phosphor, nitride phosphor or oxynitride phosphor, in them, preferably with the oxide phosphor of cerium activation or the oxynitride phosphor that activates with europium.

In addition, preferably have the phosphor of garnet crystal structure, consider that from for example stable on heating angle it is excellent as crystal structure.

The object lesson of explaining preferred green phosphor now is as follows.

(3-2-2-1)

As object lesson, mention compound by formula (7) expression, this compound comprises the composite oxides that contain divalence, trivalent and tetravalent metal element and contains Ce at least as fertile material with in this fertile material as the activator element:

M ¹ _a’M ² _b’M ³ _c’O _d’ (7)

M wherein ¹, M ²And M ³Represent divalent metal element, trivalent metallic element and tetravalent metal element respectively, a '～d ' is the numerical value in the following scope:

2.7≤a’≤3.3

1.8≤b’≤2.2

2.7≤c’≤3.3

11.0≤d’≤13.0

In formula (7), M ¹Be divalent metal element, consider, be preferably at least a element that is selected from the group of forming by Mg, Ca, Zn, Sr, Cd and Ba, more preferably Mg, Ca or Zn, especially preferably Ca from the angle of for example luminescence efficiency.In this case, Ca can be simple substance or with the compound of Mg.Basically, M ¹Preferably comprise above-mentioned preferred elements, but in the scope of not damaging performance, can contain other divalent metal element.

In addition, in formula (7), M ²Be trivalent metallic element,, be preferably at least a element that is selected from the group of forming by Al, Sc, Ga, Y, In, La, Gd and Lu, more preferably Al, Sc, Y or Lu, especially preferably Sc from similar angle.In this case, Sc can be simple substance or with the compound of Y or Lu.Basically, M ²Preferably comprise above-mentioned preferred elements, but in the scope of not damaging performance, can contain other trivalent metallic element.

In addition, in formula (7), M ³Be the tetravalent metal element,, preferably contain Si at least from similar angle, usually, by M ³At least 50 moles of % of tetravalent metal element of expression are Si, preferred at least 70 moles of %, and more preferably at least 80 moles of %, especially preferably at least 90 moles of % are Si.Tetravalent metal element M beyond the Si ³Be preferably at least a element that is selected from the group of forming by Ti, Ge, Zr, Sn and Hf, more preferably be selected from least a element in the group of forming by Ti, Zr, Sn and Hf, preferred especially Sn.Preferred especially M ³Be Si.Basically, M ³Preferably comprise above-mentioned preferred elements, but in the scope of not damaging performance, can contain other tetravalent metal element.

In the present invention, " in the scope of not damaging performance, can contain other element " is meant, respectively with respect to M ¹, M ²And M ³, the content of this element is generally 10 moles of % at the most, preferred 5 moles of % at the most, more preferably 1 mole of % at the most.

In addition, in formula (7), a ', b ', c ' and d ' are respectively the numerical value in 2.7≤a '≤3.3,1.8≤b '≤2.2,2.7≤c '≤3.3 and 11.0≤d '≤13.0 scopes.Element according to the luminescent center ion is displacement M ¹, M ²And M ³In the position of lattice of arbitrary metallic element, still be configured in the gap between lattice, a ' of this phosphor～d ' changes in above-mentioned scope.But this phosphor has garnet crystal structure, has the crystal structure of the body-centered cubic lattic of a '=3, b '=2, c '=3 and d '=12 usually.

In addition, the luminescent center ion (activator element) that is included in the compound fertile material of this crystal structure contains Ce at least, but, can add at least a divalence that is selected from the group of forming by Cr, Mn, Fe, Co, Ni, Cu, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb to quadrivalent element as coactivator, to regulate luminescence feature subtly.Especially, at least a divalence that is selected from the group of forming by Mn, Fe, Co, Ni, Cu, Sm, Eu, Tb, Dy and Yb can be added, divalence Mn, divalence or trivalent Eu or trivalent Tb can be added suitably to quadrivalent element.When adding coactivator, the amount of coactivator is generally 0.01 mole～20 moles/mole Ce.

(3-2-2-2)

In addition, as another object lesson, can mention following compounds:

M ⁵ _kM ⁶ _lM ⁷ _mO _n (8)

M wherein ⁵, M ⁶And M ⁷Expression contains activator element, divalent metal element and the trivalent metallic element of Ce at least respectively, and k～n is the numerical value in the following scope:

0.0001≤k≤0.2

0.8≤1≤1.2

1.6≤m≤2.4

3.2≤n≤4.8

In formula (8), M ⁵Be to be added in the activator element in the crystal fertile material as described later and to contain Ce at least, hold photosensitiveness or colourity in order to regulate, or in order to increase susceptibility etc., can add at least a divalence that is selected from the group of forming by Cr, Mn, Fe, Co, Ni, Cu, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb to quadrivalent element as coactivator.When adding such element as coactivator, the amount of coactivator is generally 0.01 mole～20 moles/mole Ce.

The activator element M ⁵Concentration k be 0.0001≤k≤0.2.If k is too little for value, the amount of the luminescent center ion in the crystal fertile material of phosphor will be too little, and luminous intensity will be lower.On the other hand, if value k is too big, owing to the concentration delustring, luminous intensity is with less so.Therefore, from the angle of luminous intensity, k is preferably 0.0005≤k≤0.1, most preferably 0.002≤k≤0.04.In addition, along with the increase of Ce concentration, the glow peak wavelength will be shifted to long wavelength side, and the amount with green glow of high visibility relatively increases.Therefore, consider that from the angle of the balance between luminous intensity and the glow peak wavelength k is preferably 0.004≤k≤0.15, more preferably 0.008≤k≤0.1, most preferably 0.02≤k≤0.08.

In formula (8), M ⁶Be divalent metal element, consider, be preferably at least a element that is selected from the group of forming by Mg, Ca, Zn, Sr, Cd and Ba, more preferably Mg, Ca or Sr, preferred elements M especially from the angle of for example luminescence efficiency ⁶At least 50 moles of % are Ca.

In formula (8), M ⁷It is trivalent metallic element, consider from similar angle, be preferably at least a element that is selected from the group of forming by Al, Sc, Ga, Y, In, La, Gd, Yb and Lu, more preferably Al, Sc, Yb or Lu, more preferably Sc, Sc and Al or Sc and Lu, special preferred elements M ⁷At least 50 moles of % are Sc.

The fertile material crystal of phosphor is generally by comprising divalent metal element M ⁶, trivalent metallic element M ⁷With oxygen by composition formula M ⁶M ⁷ ₂O ₄The crystal of expression, therefore the chemical composition ratio is generally in formula (8): 1 be 1, m be 2 and n be 4.But, in the present invention, according to be activator Elements C e be the displacement M ⁶And M ⁷In the crystallographic site of any metallic element, still be configured in the gap between lattice, be not must be 1 be 1 in the formula (8), m be 2 and n be 4 situation.Therefore, l, m and n be 0.8≤1≤1.2, the numerical value in 1.6≤m≤2.4 and 3.2≤n≤4.8 scopes.In addition, 1 and m be preferably 0.9≤1≤1.1 and 1.8≤m≤2.2 scopes in numerical value, n is preferably the numerical value in 3.6≤n≤4.4 scopes.In addition, M ⁶And M ⁷Represent divalence and trivalent metallic element respectively, but can use monovalence, tetravalence or pentavalent metallic element to replace the seldom M of part ⁶And/or M ⁷, so that regulate for example charge balance, need only angle from for example luminescence feature or crystal structure, do not exist essential distinction just passable.In addition, this compound can contain negative ion such as very a spot of for example halogen element (F, Cl, Br or I), nitrogen, sulphur or selenium.

With this material of optical excitation of 420nm～480nm, the highest with this physical efficiency of optical excitation of 440nm～470nm.Luminescent spectrum has the peak in 490nm～550nm scope, and has the wavelength component in 450nm～700nm scope.

(3-2-2-3)

As other object lesson of preferred green phosphor, for example can mention MSi with the europium activation ₂N ₂O ₂(wherein M is a kind of or at least two kinds of earth alkali metal) and with the β-SiAlON of europium activation put down in writing the β-SiAlON that should activate with europium on March 23rd, 2005 in ripple the research press conference of city, study column, the science press conference of civilian portion and the science press conference data " White LED is succeeded in developing with green phosphor " by Independent Administrative Institution, matter and Materials Research Institution building of delivering.

(3-3) color filter

The color filter that is used for color image display device of the present invention is not particularly limited, but for example can uses following color filter.In this case, preferred feature is disclosed color filter in above-mentioned (2) chapter of blue pixel of color filter.

Color filter is to form fine pixel such as red, green and blueness with methods such as decoration method, print process, electrodeposition process or pigment dispersing methods and the color filter that obtains on transparency carriers such as glass.In order to cover at the light leak between these pixels, the light-shielding pattern that is called black matrix usually is set between pixel to obtain more high quality images.

The color filter that obtains with decoration method prepares as follows: form image with photoresist, this photoresist is mixed into the dichromate as emulsion in gelatin, the polyvinyl alcohol (PVA) etc. and obtains; Then dye.The color filter that is obtained by print process prepares as follows: with silk screen print method, gravure processes, flexographic printing method, reversal printing method or soft lithographic method methods such as (imprint lithographies) Thermocurable or photo-curable printing ink are transferred on the transparency carriers such as glass.The color filter that obtains through electrodeposition process is formed by following method: the transparency carriers such as glass that will be provided with electrode are immersed in the body lotion that contains pigment or dyestuff, carry out electrophoresis.The color filter that is obtained by the pigment dispersing method is formed by following method: will be for example colorant such as pigment be dispersed or dissolved in the photoresist and the composition that obtains is coated on the transparency carrier such as glass, to form coated film, by photomask with this coated film of radiation exposure exposing, remove unexposed portion to form pattern through development treatment.Color filter also can comprise: will disperse or dissolve the polyimide based resin composition coating of colorant, and form the method for pixel image with etching method with other method preparation beyond these methods; The resin combination coating film forming that will contain colorant makes this film attached on the transparency carrier, peels off, and carries out image exposure and development to form the method for pixel image; Form the method for pixel image with ink-jet printer; Or the like.

In recent years, because the throughput rate of pigment dispersing method is high and little excellent in workability,, but can prepare color filter of the present invention with among the above-mentioned preparation method any so this method has become the main flow that preparation is used for the color filter of liquid crystal display cells.

The example that forms the method for black matrix comprises: form chromium and/or chromium oxide (single or multiple lift) film with methods such as sputters on the whole surface of transparency carriers such as glass, only remove the method for colour element part then through etching; The photosensitive composite that disperses or dissolves shading component is coated on the transparency carrier such as glass to form coated film, through photomask with this coated film of radiation exposure to expose, remove unexposed portion to form method of patterning through development; Or the like.

(3-3-1) prepare the method for color filter

Now the object lesson with the preparation method of color filter of the present invention is described below.Usually disposing formation redness, green and blue pixels image on the transparency carrier of black matrix, prepare color filter of the present invention thus.

There is no particular limitation to the material of transparency carrier.This examples of material comprises: the thermoplastic plastic sheet of polyolefin, polycarbonate, polymethylmethacrylate and polysulfones such as polyester, for example polypropylene, tygon such as polyethylene terephthalate for example; The thermosetting plastics sheet material of epoxy resin, unsaturated polyester resin, poly-(methyl) acrylic resin etc.; Various glass plates etc.In these materials, consider thermotolerance, preferable material is glass plate and heat-resistant plastic.

In order to improve the physical property of the adhesiveness etc. that comprises the surface, can be with Corona discharge Treatment, ozone treatment, handle this transparency carrier in advance with for example methods such as film processing of various polymkeric substance such as silane coupling agent and polyurethane.

Utilize metallic film or black matrix on transparency carrier, to form black matrix with dispersible pigment dispersion.

The two-layer black matrix that adopts metallic film that forms of the individual layer by for example chromium or chromium and chromium oxide.In this case, at first, on transparency carrier, form the film of these metals or metal-metallic oxide with evaporation or sputtering method etc.Then, form photosensitive film thereon, make this photosensitive film exposure and development with photomask then, thereby form the resist image with repeat patterns such as striped, mosaic, triangles.After this, this film is carried out etching, thereby form black matrix.

When utilizing black matrix to use dispersible pigment dispersion, use and to contain black colorant and make the color filter of colorant and form black matrix with composition.For example, use for example one or more black colorants such as carbon black, boneblack, graphite, iron oxide black, nigrosine, cyanine are deceived, titanium dioxide is black, or use contains the color filter composition of following black colorant, described black colorant is made by the mixing of redness, green and the blueness etc. that suitably are selected from inorganic or organic pigment and dyestuff, and the method that is similar to the formation method of following redness, green or blue pixel image by use forms black matrix.

The aforementioned color filter that will contain the colorant of a kind of color in redness, green and the blueness is coated on the transparency carrier that is provided with black matrix drying with composition.Then, photomask is placed on the coated film that obtains like this, carries out image exposure and development, carry out heat curing or photocuring as required with the formation pixel image, thereby prepare dyed layer by this photomask.Every kind of color filters red, green and blue three kinds of colors are carried out this operation with composition, thereby form the color filter image.

For example can adopting, spinner, the excellent spreader that winds the line, curtain coater, mould are coated with the coating that apparatus for coating such as machine, roll coater and sprayer carry out color filter usefulness composition.

After the coating, carry out drying with electric hot plate, infra-red furnace, convection oven etc.Baking temperature is high more, and is good more to the adhesiveness of transparency carrier.But temperature is too high, the photopolymerization initiator system is decomposed and the initiation thermal polymerization, thereby cause poor visualization.Therefore, baking temperature is selected from 50 ℃～200 ℃ scope usually, preferred 50 ℃～150 ℃ scope.Usually be selected from 10 seconds drying time～10 minutes scope, preferred 30 seconds～5 minutes scope.

Also can be before these heating and drying methods the application of reduced pressure drying means.

The thickness of dry back coated film is usually in the scope of 0.5 μ m～3 μ m, preferably in the scope of 1 μ m～2 μ m.

Comprise the combination of adhesive resin and ethylenic compound with composition at the color filter that uses, and adhesive resin is to have in the side chain in the situation of acryl resin of two keys of alkene formula and carboxyl, it has very high light sensitivity and high resolution, therefore preferably can be through the exposure and the formation image that develops under the situation that is not equipped with barrier to oxygen such as polyvinyl alcohol (PVA).

There is no particular limitation to the exposure light source that is used for image exposure, but, for example spendable light source comprises: lamp source, for example xenon lamp, halogen lamp, tungsten lamp, high-pressure sodium lamp, ultrahigh pressure mercury lamp, metal halide lamp, medium pressure mercury lamp, low pressure mercury lamp, carbon arc lamp and fluorescent light; LASER Light Source, for example Argon ion laser, YAG laser instrument, excimer laser, nitrogen laser, helium cadmium laser and semiconductor laser etc.In order only to use a certain specific wavelength, can use light filter.

After finishing image exposure, with containing organic solvent or contain surfactant and the aqueous solution of alkaline reagent is developed coated film, thereby on substrate, form image with this class light source.This aqueous solution can also contain organic solvent, buffering agent, dyestuff or pigment.

Developing method is had no particular limits, but for example adopt immersion development, spray development, scrub methods such as development, ultrasound wave development,, preferably under the development temperature of 15 ℃～45 ℃ of scopes, develop usually 10 ℃～50 ℃ scopes.

The example of the alkaline reagent that uses in development comprises: inorganic alkaline agents, for example sodium silicate, potassium silicate, NaOH, potassium hydroxide, lithium hydroxide, sodium phosphate, sodium hydrogen phosphate, sodium carbonate, sal tartari, sodium bicarbonate etc.; And organic amine, for example trimethylamine, diethylamine, isopropylamine, n-butylamine, monoethanolamine, diethanolamine, triethanolamine, tetraalkylammonium hydroxide etc., they can use or be used in combination individually.

The example of operable surfactant comprises: non-ionic surfactant, for example polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyxyethylated ester, sorbitan Arrcostab, monoglyceride Arrcostab etc.; Anionic surfactant, for example alkyl benzene sulfonate, alkylnaphthalene sulfonate, alkyl sulfate, alkyl sulfonate, esters of sulfosuccinic acids salt etc.; And amphoteric surfactant, for example alkyl betaine, amino acid etc.

With an organic solvent reaching separately and aqueous solution in combination in an organic solvent the situation, organic solvent can be selected from for example isopropyl alcohol, benzylalcohol, ethyl cellosolve, butyl cellosolve, ethylene glycol monophenyl ether, propylene glycol, diacetone alcohol etc.

(3-4) color filter composition

The color filter that is used for color image display device of the present invention is had no particular limits with composition (resist), for example can use following composition.With in the situation of blue pixel, preferably use disclosed color filter blue composition in above-mentioned (1) chapter at the preparation color filter.

Below explanation is used to prepare the raw material of color filter, and the example that becomes the pigment dispersion method of main flow in recent years.

Pigment dispersion method uses colorant such as pigment for example to be dispersed in composition (after this being called " color filter composition ") in the above-mentioned photoresist.This color filter generally is as constituting components dissolved or being dispersed in color composition for color filter in the solvent with adhesive resin (a) and/or monomer (b), colorant (c) and other components (d) with composition.

Each component of detailed hereafter.In the following description, " (methyl) acryloyl ", " (methyl) acrylate " and " (methyl) vinyl cyanide " refer to " acryloyl or methacryl ", " acrylate or methacrylate " and " vinyl cyanide or methacrylonitrile " respectively.

(a) adhesive resin

When using adhesive resin separately, the preparation method who consider target imaging and performance, is adopted etc. select appropriate adhesive resin suitably.When using adhesive resin with the combination of monomers described later, for color filter with the modification of composition with the physical property after improving photocuring, the adding adhesive resin.For this reason, in this case,, select adhesive resin suitably according to the purpose of improving compatibility, film forming, development, adhesiveness etc.

Normally used adhesive resin for example is (methyl) acrylic acid; (methyl) acrylate; (methyl) acrylamide; maleic acid; (methyl) vinyl cyanide; styrene; vinyl acetate; vinylidene chloride; the homopolymer of maleimide etc. or multipolymer; polyethylene oxide; polyvinyl pyrrolidone; polyamide; polyurethane; polyester; polyethers; polyethylene terephthalate; the acetyl group cellulose; novolac resin; resol; polyvinylphenol; polyvinyl butyral etc.

In these adhesive resins, the preferred adhesive resin is those adhesive resins that have carboxyl or phenolic hydroxyl in its side chain or the main chain.The resin that use has these functional groups can develop in alkaline solution.In them, the preferred adhesive resin is the resin with carboxyl with high alkalinity development; Anhydride modified resin of polymerizing acrylic acid thing (multipolymer), phenylethylene/maleic anhydride resin, line style phenolic aldehyde epoxy acrylate etc. for example.

Particularly preferred adhesive resin is the polymkeric substance (multipolymer) (will be called " acryl resin " in this manual) that contains (methyl) acrylic acid or have (methyl) acrylate of carboxyl.That is to say, consider from performance and preparation method's easy to be controlled angle, preferred these acryl resins, this is because they have the excellent development and the transparency, and can select various monomers and obtain multiple multipolymer.

The object lesson of acryl resin comprises following resin: add on (methyl) acrylic acid hydroxyalkyl acrylate with (methyl) acrylic acid and/or with acid (acid anhydrides) and the compound that obtains as must component, in case of necessity with the resulting resin of one of following various monomers copolymerization.Described acid (acid anhydrides) for example is (anhydrous) succinic acid, (anhydrous) phthalic acid, (anhydrous) maleic acid etc.Described (methyl) acrylic acid hydroxyalkyl acrylate for example is succinic acid-2-(methyl) acryloxy ethyl ester, hexane diacid-2-acryloxy ethyl ester, phthalic acid-2-(methyl) acryloxy ethyl ester, hexahydrophthalic acid-2-(methyl) acryloxy ethyl ester, maleic acid-2-(methyl) propenyloxy group ethyl ester, succinic acid-2-(methyl) acryloxy propyl ester, hexane diacid-2-(methyl) acryloxy propyl ester, hexahydrophthalic acid-2-(methyl) acryloxy propyl ester, phthalic acid-2-(methyl) acryloxy propyl ester, maleic acid-2-(methyl) propenyloxy group propyl ester, succinic acid-2-(methyl) acryloxy butyl ester, hexane diacid-2-(methyl) acryloxy butyl ester, hexahydrophthalic acid-2-(methyl) acryloxy butyl ester, phthalic acid-2-(methyl) acryloxy butyl ester, maleic acid-2-(methyl) propenyloxy group butyl ester etc.Described various monomer for example is: styrene type monomer, for example styrene, α-Jia Jibenyixi, vinyltoluene etc.; The carboxylic acid that contains unsaturated group, for example cinnamic acid, maleic acid, fumaric acid, maleic anhydride, itaconic acid etc.; (methyl) acrylate, for example (methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) propyl acrylate, (methyl) allyl acrylate, (methyl) butyl acrylate, (methyl) acrylic acid-2-ethyl caproite, (methyl) hydroxy-ethyl acrylate, (methyl) hydroxypropyl acrylate, (methyl) benzyl acrylate, (methyl) crylic acid hydroxylphenyl ester, (methyl) acrylic acid methoxyl phenyl ester etc.; For example one of lactones such as 6-caprolactone, beta-propiolactone, gamma-butyrolacton, δ-Wu Neizhi add to the compound that obtains in (methyl) acrylic acid; Vinyl cyanide; Acrylamide, for example (methyl) acrylamide, N hydroxymethyl acrylamide, N,N-DMAA, N-methacryl morpholine, (methyl) acrylic acid-N, N-dimethylamino ethyl ester, N, N-dimethyl aminoethyl acrylamide etc.; Vinyl acetate, for example vinyl acetate, branched paraffin vinyl acetate (vinyl versatate), propionate, vinyl cinnamate, new vinyl acetate acid etc.

In order to increase the purpose of coated film intensity, the preferred acryl resin that uses is 10 moles of %～98 mole %, preferred 20 moles of %～80 mole %, more preferably a kind of monomer of 30 moles of %～70 mole % and 2 moles of %～90 mole % with phenyl, preferred 20 moles of %～80 mole %, more preferably 30 moles of %～70 mole %'s is selected from those acryl resins that at least a monomer copolymerization in following group obtains, described monomer with phenyl for example is styrene, α-Jia Jibenyixi, (methyl) benzyl acrylate, (methyl) crylic acid hydroxylphenyl ester, (methyl) acrylic acid methoxyl phenyl ester, hydroxy phenyl (methyl) acrylamide, hydroxy phenyl (methyl) propenyl sulfonamide etc., described group is by (methyl) acrylic acid and for example succinic acid-2-(methyl) acryloxy ethyl ester, hexane diacid-2-acryloxy ethyl ester, phthalic acid-2-(methyl) acryloxy ethyl ester, hexahydrophthalic acid-2-(methyl) acryloxy ethyl ester, maleic acid-2-(methyl) acryloxy ethyl ester etc. has the group of compositions such as (methyl) acrylate of carboxyl.

In addition, these resins preferably have the two keys of alkene formula in side chain.The adhesive resin that has two keys in the use side chain can improve the color filter photo-curable of composition that obtains, thereby can further improve resolution and adhesiveness.

The method that the two keys of alkene formula are introduced in the adhesive resin comprises: disclosed method in the public clear 50-34443 communique of spy, special public clear 50-34444 communique etc. for example; That is, make the method for the carboxyl reaction of the compound that has glycidyl or epoxycyclohexyl and (methyl) acryloyl group simultaneously and resin, and the method that makes acryloyl chloride etc. and the hydroxyl reaction of resin.

For example; make for example (methyl) glycidyl acrylate, allyl glycidyl ether, α-Yi Jibingxisuan ethylene oxidic ester, crotonyl glycidyl ether, (different) crotonic acid glycidol ether, (methyl) acrylic acid (3; the 4-epoxycyclohexyl) compounds such as methyl esters, (methyl) acryloyl chloride or (methyl) acryloyl group chlorine with have the resin reaction of carboxyl or hydroxyl, obtain having in the side chain adhesive resin of the two keys of alkene formula.Particularly preferred adhesive resin is those adhesive resins that obtain with the reaction of alicyclic epoxide compound such as for example (methyl) acrylic acid (3, the 4-epoxycyclohexyl) methyl esters.

When two keys were incorporated in the above-mentioned resin with carboxyl or hydroxyl in advance the alkene formula, the compound that preferably will have the two keys of alkene formula was bonded to 2 moles of %～50 mole %, on the carboxyl or hydroxyl in the resin of preferred 5 moles of %～40 mole %.

Measure with GPC, the weight-average molecular weight of these acryl resins is preferably 1,000～100,000 scope.If weight-average molecular weight less than 1,000, will be difficult to obtain uniform coated film.On the other hand, if it surpasses 100,000, development will reduce.The preferred content of carboxyl is 5～200 scope at acid number.If this acid number is less than 5, resin will be not dissolved in the alkaline-based developer.On the other hand, if it surpasses 200, light sensitivity will be lower.

With in the total solid composition of composition, the content of these adhesive resins is usually at 10 weight %～80 weight % at color filter, the scope of preferred 20 weight %～70 weight %.

(b) monomer

There is no particular limitation to monomer, as long as it is that the polymerism low molecular weight compound is just passable.Preferred monomers is the addition polymerization compound (after this abbreviating " ethylenic compound " as) with the two keys of at least one alkene formula.Ethylenic compound is such compound with the two keys of alkene formula: when this color filter is exposed to dynamic rays with composition, because of as hereinafter described Photoepolymerizationinitiater initiater system effect addition polymerization with curing.Monomer of the present invention is the notion for so-called polymer substance, and it not only comprises the monomer of narrow sense, and comprises dimer, tripolymer and oligomer.

Ethylenic compound for example is a unsaturated carboxylic acid; the ester of unsaturated carboxylic acid and monohydroxy compound; the ester of aliphatic polyhydroxy compound and unsaturated carboxylic acid; the ester of aromatic polyhydroxy compounds and unsaturated carboxylic acid; the ester that the esterification of polyols such as unsaturated carboxylic acid and polybasic carboxylic acid and for example aforementioned aliphatic polyhydroxy compound or aromatic polyhydroxy compounds obtains; make ethylenic compound that polyisocyanate compound and the hydroxyl compound reaction that contains (methyl) acryloyl group obtain etc. with carbamate skeleton.

Unsaturated carboxylic acid for example is (methyl) acrylic acid, (anhydrous) maleic acid, crotonic acid, itaconic acid, fumaric acid, 2-(methyl) acryloxy ethyl succinic acid, 2-acryloxy ethyl hexane diacid, 2-(methyl) acryloxy ethyl phthalic acid, 2-(methyl) acryloxy ethyl hexahydrophthalic acid, 2-(methyl) acryloxy ethyl maleic acid, 2-(methyl) acryloxy propyl group succinic acid, 2-(methyl) acryloxy propyl group hexane diacid, 2-(methyl) acryloxy propyl group hydrogenation phthalic acid, 2-(methyl) acryloxy propyl group phthalic acid, 2-(methyl) acryloxy propyl group maleic acid, 2-(methyl) acryloxy butyl succinic acid, 2-(methyl) acryloxy butyl hexane diacid, 2-(methyl) acryloxy butyl hydrogenation phthalic acid, 2-(methyl) acryloxy butyl phthalic acid, 2-(methyl) acryloxy butyl maleic acid, with for example 6-caprolactone, beta-propiolactone, gamma-butyrolacton, one of lactones such as δ-Wu Neizhi add to the monomer that obtains on (methyl) acrylic acid, or will be for example (anhydrous) succinic acid, acid (acid anhydrides) such as (anhydrous) phthalic acid or (anhydrous) maleic acid add to the monomer that obtains on (methyl) acrylic acid hydroxyalkyl acrylate.In them, preferred (methyl) acrylic acid and 2-(methyl) acryloxy ethyl succinic acid, more preferably (methyl) acrylic acid.These monomers can be used in combination.

The ester of aliphatic polyhydroxy compound and unsaturated carboxylic acid can be: acrylate, for example glycol diacrylate, triethylene glycol diacrylate, trimethylolpropane triacrylate, trimethylolethane trimethacrylate acrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, tetramethylol methane tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol five acrylate, dipentaerythritol acrylate, acrylic acid glyceride etc.In addition, described ester can be for partly replacing methacrylate, itaconate, crotonates or the maleate that the acrylate moiety of aforementioned acrylate obtains with metering system acid moieties, itaconic acid part, crotonic acid part or maleic acid respectively.

The ester of aromatic polyhydroxy compounds and unsaturated carboxylic acid can be quinhydrones diacrylate, quinhydrones dimethylacrylate, resorcinol diacrylate, resorcinol dimethylacrylate, 1,2,3,-thrihydroxy-benzene triacrylate etc.

The ester that the esterification of unsaturated carboxylic acid and polybasic carboxylic acid and polyol obtains needs not to be simple substance, and can be potpourri.The exemplary of ester comprises the condensation product etc. of condensation product, acrylic acid, hexane diacid, butylene glycol and glycerine of condensation product, methacrylic acid, terephthalic acid (TPA) and pentaerythrite of condensation product, acrylic acid, maleic acid and the diethylene glycol of acrylic acid, phthalic acid and ethylene glycol.

The ethylenic compound with carbamate skeleton that polyisocyanate compound is obtained with the hydroxyl compound reaction that contains (methyl) acryloyl group can be: make for example aliphatic diisocyanate such as hexamethylene diisocyanate, trimethyl hexamethylene diisocyanate; Alicyclic diisocyanate such as cyclohexane diisocyanate, isophorone diisocyanate for example; For example aromatic diisocyanate such as inferior cresyl vulcabond, methyl diphenylene diisocyanate and for example 2-Hydroxy ethyl acrylate, methacrylic acid-2-hydroxy methacrylate, 3-hydroxyl (1; 1; 1-three acryloyl-oxy ylmethyls) propane, 3-hydroxyl (1; 1,1-trimethyl acryloyl-oxy ylmethyl) propane etc. contains the reaction product of the hydroxyl compound of (methyl) acryloyl group.

Other example of the ethylenic compound that the present invention uses comprises: acrylamide, for example ethylenebis acrylamide; Allyl ester, for example diallyl phthalate; The compound that contains vinyl, for example phthalic acid divinyl ester.

With respect to the total solid composition of color filter with composition, the match ratio of this ethylenic compound is usually in the scope of 10 weight %～80 weight %, preferably in the scope of 20 weight %～70 weight %.

(c) colorant

In order to effectively utilize light as much as possible from backlight, be necessary to select colorant, make according to red, green and blue emission wavelength backlight, in every kind of color pixel, transmissivity at phosphor luminescence wavelength place is high as much as possible, and low as much as possible in the transmissivity at other emission wavelength place.

Especially, the invention is characterized in the high colour gamut that can not be obtained by conventional LED-backlit, therefore, the selection of colorant should be noted that especially.That is to say, must satisfy following condition, to utilize the distinctive feature backlight of the present invention fully with peony and green emitting wavelength.

At first explain red pixel below.

Use from the product of the spectral-transmission favtor of the red pixel of luminous and color filter backlight and determine light quantity from the red pixel of transparent or semitransparent transmission mode.Therefore, in order to obtain the sufficient light quantity that the peony wavelength region may is 620nm～680nm, select colorant, make relative luminous intensity I (λ from the total luminous intensity standardization of quilt of LED-backlit _n) at the spectral-transmission favtor T that represents with number percent of the mean value I (620-680) at 620nm～680nm wavelength place and red color filter ^B(λ _n) mean value T in identical wavelength region may ^RProduct (620-680), i.e. I (620-680) * T ^R(620-680) be at least 1.1, preferably at least 1.2, more preferably at least 1.3.In addition, do not reduce brightness in order to obtain high colour gamut, at 560nm≤λ _nAverage transmittance T on the wavelength region may of≤580nm ^R(560-580) be generally at least 15%, preferably at least 20%, more preferably at least 25%, especially preferably at least 28%.

As the pigment that satisfies these conditions, can use organic pigment, for example azo class, phthalocyanines, quinacridine ketone, benzimidazole ketone, isoindoline class, dioxazines, indanthrone kinds, perylene kinds and diketopyrrolopyrroles pigment, except that these, can also use various inorganic pigments.

Particularly, for example can use pigment with following face item number.Here, following " C.I. " is meant pigment index (C.I.).

Red stain: C.I. paratonere 1,2,3,4,5,6,7,8,9,12,14,15,16,17,21,22,23,31,32,37,38,41,47,48,48:1,48:2,48:3,48:4,49,49:1,49:2,50:1,52:1,52:2,53,53:1,53:2,53:3,57,57:1,57:2,58:4,60,63,63:1,63:2,64,64:1,68,69,81,81:1,81:2,81:3,81:4,83,88,90:1,101,101:1,104,108,108:1,109,112,113,114,122,123,144,146,147,149,151,166,168,169,170,172,173,174,175,176,177,178,179,181,184,185,187,188,190,193,194,200,202,206,207,208,209,210,214,216,220,221,224,230,231,232,233,235,236,237,238,239,242,243,245,247,249,250,251,253,254,255,256,257,258,259,260,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276.

In addition, following yellow colorants can mix to regulate color subtly with above-mentioned red stain.

Yellow colorants: C.I. pigment yellow 1,1:1,2,3,4,5,6,9,10,12,13,14,16,17,24,31,32,34,35,35:1,36,36:1,37,37:1,40,41,42,43,48,53,55,61,62,62:1,63,65,73,74,75,81,83,87,93,94,95,97,100,101,104,105,108,109,110,111,116,119,120,126,127,127:1,128,129,133,134,136,138,139,142,147,148,150,151,153,154,155,157,158,159,160,161,162,163,164,165,166,167,168,169,170,172,173,174,175,176,180,181,182,183,184,185,188,189,190,191,191:1,192,193,194,195,196,197,198,199,200,202,203,204,205,206,207,208.

Explain green pixel now.

Based on the identical consideration of red pixel, need satisfy following condition.

For in the bottle green wavelength region may promptly at 500nm≤λ _nObtain enough light quantities in the wavelength region may of≤530nm, I (500-530) * T ^G(500-530) be at least 1.2, preferably at least 1.3, more preferably at least 1.4, especially preferably at least 1.8, wherein, T ^G(500-530) be respectively all relative luminous intensity of average transmittance (%) peace in above-mentioned wavelength region may with I (500-530).

In addition, do not reduce brightness in order to obtain high colour gamut, at 580nm≤λ _nAverage transmittance T on the wavelength region may of≤600nm ^G(580-600) be generally at least 20%, preferably at least 30%, more preferably at least 50%.

As the pigment that satisfies these conditions, can use organic pigment, for example azo class, phthalocyanines, quinacridine ketone, benzimidazole ketone, isoindoline class, dioxazines, indanthrone kinds, perylene kinds and diketopyrrolopyrroles pigment, except that these, can also use various inorganic pigments.

Particularly, for example can use pigment with following face item number.

Green colourant: C.I. naphthol green 1,2,4,7,8,10,13,14,15,17,18,19,26,36,45,48,50,51,54,55.

In addition, above-mentioned yellow colorants can mix to regulate color subtly with above-mentioned green colourant.

As the object lesson of the green pixel that satisfies above-mentioned condition, especially preferably contain pigment green 36 and/or pigment Green 7 as at least a yellow uitramarine of using as color adaptation in viridine green and pigment yellow 150, pigment yellow 13 8 and the pigment yellow 13 9.In addition, in the situation of combination as phosphor of red-emitting phosphor (phosphor (3-2-1-1)) that selection is represented by following formula (3) and the green phosphor of being represented by following formula (7) (phosphor (3-2-2-1)), the total content of preferred viridine green and the total content of yellow uitramarine satisfy the phosphor of following relationship formula (9).In addition, more preferably satisfy following relationship formula (10), especially preferably satisfy following relationship formula (11).

0.9≤(general assembly (TW) of yellow uitramarine)/(general assembly (TW) of viridine green)≤2 (9)

1≤(general assembly (TW) of yellow uitramarine)/(general assembly (TW) of viridine green)≤1.8 (10)

1.05≤(general assembly (TW) of yellow uitramarine)/(general assembly (TW) of viridine green)≤1.5 (11)

Explain that now blue pixel is as follows.

There is no particular limitation to blue pixel, can use following pigment.

Particularly, for example can use pigment with following face item number.

Blue colorant: C.I. pigment blue 1,1:2,9,14,15,15:1,15:2,15:3,15:4,15:6,16,17,19,25,27,28,29,33,35,36,56,56:1,60,61,61:1,62,63,66,67,68,71,72,73,74,75,76,78,79.

Violet colorant: C.I. pigment violet 1,1:1,2,2:2,3,3:1,3:3,5,5:1,14,15,16,19,23,25,27,29,31,32,37,39,42,44,47,49,50.

In addition, except red, green and blue, according to circumstances need to use following pigment to regulate color subtly.

Orange colorant: C.I. pigment orange 1,2,5,13,16,17,19,20,21,22,23,24,34,36,38,39,43,46,48,49,61,62,64,65,67,68,69,70,71,72,73,74,75,77,78,79.

Brown colorant: C.I. bistre 1,6,11,22,23,24,25,27,29,30,31,33,34,35,37,39,40,41,42,43,44,45.

Certainly use other colorant.

Dyestuff can be azo dyes, anthraquinone dyes, phthalocyanines dye, quinone imides dyestuff, quinolines dyestuff, nitro class dyestuff, carbonyl class dyestuff, methine class dyestuff etc.

Azo dyes for example can be the C.I. acid yellow 11, C.I. acid orange 7, C.I. acid red 37, C.I. acid red 18 0, C.I. acid blue 29, C.I. directly red 28, C.I. directly red 83, C.I. direct yellow 12, C.I. direct orange 26, C.I. direct green 28, C.I. direct green 59, C.I. reactive yellow 2, C.I. reactive red 17, C.I. reactive red 120, C.I. reactive black 5, C.I. disperse orange 5, C.I. disperse red 58, C.I. disperse blue 165, C.I. alkali blue 41, C.I. Basic Red 18, C.I. mordant rouge 7, C.I. mordant yellow 5, C.I. mordant dyeing black 7 etc.

Anthraquinone dyes for example can be C.I. vat blue 4, C.I. Acid Blue 40, C.I. ACID GREEN 25, C.I. active blue 19, C.I. reactive blue 49, C.I. disperse red 60, C.I. Disperse Blue-56, C.I. disperse blue 60 etc.

In addition, phthalocyanines dye for example can be C.I. pad dyeing indigo plant (pad blue) 5 etc.; Quinoline imines class dyestuff for example can be C.I. alkali blue 3, C.I. alkali blue 9 etc.; The quinolines dyestuff for example can be C.I. solvent yellow 33, C.I. quinoline yellow, C.I. dispersion yellow 64 etc.; And nitro class dyestuff for example can be C.I. Indian yellow 1, C.I. acid orange 3, C.I. Disperse Yellow 42 etc.

Can be used on color filter can be inorganic colourant with other colorant in the composition, for example barium sulphate, lead sulfate, titania, oxidation lead and yellow-collation, iron oxide red, chromium oxide and carbon black.

These colorants preferably are dispersed into 0.5 μ m at the most, preferred 0.2 μ m at the most and more preferably at the most the mean grain size of 0.1 μ m use.

With the total solid composition of composition, the content of these colorants is usually at 5 weight %～60 weight % with respect to color filter, the scope of preferred 10 weight %～50 weight %.

(d) other component

If situation needs, color filter is with adding photopolymerization initiator system, thermal polymerization inhibitor, plastifier, storage stabilizing agent, outer paint, smoothing preparation, coating additive and other adjuvant in the composition.

(d-1) photopolymerization initiator system

Comprise with composition in the situation of ethylenic compound as monomer (b) at color filter, need to use photopolymerization initiator system with following function: direct absorbing light or decomposed or dehydrogenation reaction to induce by photoactivate, thus produce the polymerization activity free radical.

The photopolymerization initiator system comprises the system of adjuvants such as containing polymerization initiator and for example promoter in combination.Polymerization initiator can be for example free radical activator, for example special opening clear 59-152396 number and the special disclosed metallocene compound that comprises two cyclopentadiene titanium compounds of each communique of opening clear 61-151197 number, the disclosed for example 2-of Te Kaiping 10-39503 communique (2 '-chlorphenyl)-4, the salt of N-aryl-a-amino acids such as Hexaarylbiimidazole derivants such as 5-diphenyl-imidazole, halomethyl Striazine derivative, for example N-phenylglycine, N-aryl-a-amino acid, the ester of N-aryl-a-amino acid etc.The promoter of using for example is as N, N such as N-dimethylaminobenzoic acid ethyl ester, N-dialkyl amido benzoic acid alkyl ester, for example 2-mercaptobenzothiazole, 2-mercaptobenzoxazole or 2-mercaptobenzimidazole etc. have the sulfhydryl compound of heterocycle or aliphatics polyfunctional group sulfhydryl compound etc.Polymerization initiator and adjuvant can be used in combination respectively.

With respect to the total solid composition of composition of the present invention, the match ratio of photopolymerization initiator system is at 0.1 weight %～30 weight %, preferred 0.5 weight %～20 weight %, the more preferably scope of 0.7 weight %～10 weight %.If this match ratio is too low, light sensitivity is with step-down.On the other hand, if too high, the solubleness of unexposed portion in developer solution reduces, and is easy to generate the development fault.

(d-2) thermal polymerization inhibitor

The thermal polymerization inhibitor that uses for example can be quinhydrones, p methoxy phenol, 1,2,3,-thrihydroxy-benzene, catechol, 2,6 ditertiary butyl p cresol, betanaphthol etc.With respect to the total solid composition of composition, the match ratio of thermal polymerization inhibitor is preferably in the scope of 0～3 weight %.

(d-3) plastifier

The plastifier that uses for example can be dioctyl phthalate, phthalic acid two (dodecyl) ester, triethylene glycol dicaprylate, dimethyl glycol phthalate, trimethylphenyl phosphate, dioctyl adipate, dibutyl sebacate, glyceryl triacetate etc.With respect to the total solid composition of composition, the match ratio of plastifier is 10 weight % at the most preferably.

(d-4) sensitizing dyestuff

And, in order to improve light sensitivity, if situation needs, can be at the color filter sensitizing dyestuff that mixes in the composition corresponding to the image exposure optical source wavelength.

The example of sensitizing dyestuff comprises that the spy opens the xanthene dye of describing in flat 04-221958 communique and the flat 04-219756 communique of Te Kai, the coumarine dye of describing in the flat 05-289335 communique of Te Kaiping 03-239703 communique and Te Kai with heterocycle, the 3-ketone coumarin compound of describing in the flat 05-289335 communique of Te Kaiping 03-239703 communique and Te Kai, pyrroles's methylene dye of describing in the Te Kaiping 06-19240 communique, the spy opens clear 47-2528 communique, the spy opens clear 54-155292 communique, special public clear 45-37377 communique, the spy opens clear 48-84183 communique, the spy opens clear 52-112681 communique, the spy opens clear 58-15503 communique, the spy opens clear 60-88005 communique, the spy opens clear 59-56403 communique, Te Kaiping 02-69 communique, the spy opens clear 57-168088 communique, Te Kaiping 05-107761 communique, the dyestuff of describing in the flat 04-288818 communique of Te Kaiping 05-210240 communique and Te Kai with dialkyl amido benzene skeleton.

In these sensitizing dyestufves, preferably contain amino sensitizing dyestuff, more preferably with the compound that has amino and phenyl in a part.Particularly preferred example such as benzophenone compound, for example 4,4 '-two (dimethylamino) benzophenone, 4,4 '-two (diethylamino) benzophenone, 2-aminobenzophenone, 4-aminobenzophenone, 4,4 '-diaminobenzophenone, 3,3 '-diaminobenzophenone or 3, the 4-diaminobenzophenone; Contain compound to the dialkyl amido phenyl, for example 2-is (to dimethylaminophenyl) benzoxazole, 2-is (to diethylamino phenyl) benzoxazole, 2-(to dimethylaminophenyl) benzo [4,5] benzoxazoles, 2-(to dimethylaminophenyl) benzo [6,7] benzoxazoles, 2, two (to the diethylamino phenyl)-1 of 5-, 3, the 4-oxazole, 2-(to dimethylaminophenyl) benzothiazole, 2-(to the diethylamino phenyl) benzothiazole, 2-(to dimethylaminophenyl) benzimidazole, 2-(to the diethylamino phenyl) benzimidazole, 2, two (to the diethylamino phenyl)-1 of 5-, 3, the 4-thiadiazoles, (to dimethylaminophenyl) pyridine, (to the diethylamino phenyl) pyridine, (to dimethylaminophenyl) quinoline, (to the diethylamino phenyl) quinoline, (to dimethylaminophenyl) pyrimidine or (to the diethylamino phenyl) pyrimidine etc.In them, most preferably 4,4 '-dialkyl amido benzophenone.

With the total solid composition of composition, the match ratio of sensitizing dyestuff is usually at 0～20 weight % with respect to color filter, preferred 0.2 weight %～15 weight %, the more preferably scope of 0.5 weight %～10 weight %.

(d-5) other adjuvant

Color filter adheres to improver, coating improver, development improver etc. with can also suitably adding in the composition.

In order to control viscosity and dissolving photopolymerization initiator system and other adjuvant, color filter can be dispersed in the solvent with composition and use.

Can come suitably selective solvent according to the component of for example adhesive resin (a), monomer compositions such as (b).Solvent for example can be Di Iso Propyl Ether, Mineral spirits, n-pentane, amyl ether, ethyl caprilate, normal hexane, diethyl ether, isoprene, the ethyl isobutyl ether, butyl stearate, normal octane, Varsol#2, the Apco#18 solvent, diisobutylene, pentyl acetate, butyl acetate, the Apco thinning agent, butyl ether, diisobutyl ketone, methylcyclohexene, methyl nonyl ketone, propyl ether, dodecane, Socal Solvent No.1 and No.2, amyl formate, two hexyl ethers, diisopropyl ketone, Solveso#150, acetate (just, secondary, uncle) butyl ester, hexene, Shell TS28 solvent, chlorobutylene, ethyl pentyl group ketone, ethyl benzoate, chloropentane, the ethylene glycol bisthioglycolate ethylether, ethyl orthoformate, the methoxy pentanone, methyl butyl ketone, methohexitone, methyl isobutyrate, the benzene nitrile, ethyl propionate, methylcellosolve acetate, methyl isoamyl ketone, methyl isobutyl ketone, propyl acetate, pentyl acetate, amyl formate, the connection cyclohexane, the diethylene glycol monoethyl ether acetic acid esters, cinene, the methoxy amylalcohol, methyl amyl ketone, methyl isopropyl Ketone, propyl propionate, the glycol tertiary butyl ether, MEK, methyl cellosolve, ethyl cellosolve, ethyl cellosolve acetate, carbitol, cyclohexanone, ethyl acetate, propylene glycol, propylene glycol monomethyl ether, propylene glycol methyl ether acetate, dihydroxypropane single-ether, propylene glycol monoethyl ether acetate, the single ether of dipropylene glycol, dipropylene glycol monomethyl ether, the dipropylene glycol monomethyl ether acetic acid esters, the 3-methoxypropionic acid, the 3-ethoxy-propionic acid, 3-ethoxy-propionic acid methyl esters, the 3-ethoxyl ethyl propionate, 3-methoxypropionic acid methyl esters, 3-methoxy propyl acetoacetic ester, 3-methoxy propyl propyl propionate, 3-methoxy propyl acid butyl ester, diethylene glycol dimethyl ether, the ethylene glycol ethyl ethers acid esters, ethyl carbitol, butyl carbitol, ethylene glycol monobutyl ether, the glycol tertiary butyl ether, 3-methyl-3-methoxybutanol, the tripropylene glycol methyl ether, acetate-3-methyl-3-methoxyl butyl ester etc.These solvents can be used in combination.

According to the solid component concentration in the coating process selective color filter usefulness color-forming compositions that uses.Widely used spin-coating method, slit spin-coating method and mould are coated with in the method when present preparation color filter, and suitable solid component concentration is usually in the scope of 1 weight %～40 weight %, preferably in the scope of 5 weight %～30 weight %.

The combination of solvent definite must consider dispersing of pigments stability, the drying property during to the dissolubility of soluble component in the solid constituents such as resin, monomer and Photoepolymerizationinitiater initiater for example, coating and the drying property of drying under reduced pressure process.

For example, prepare the color filter composition that uses above-mentioned matching component as follows.

At first, colorant is carried out dispersion treatment, be controlled to the printing ink state.Make and paint dispenser, sand mill, bowl mill, roller mill, burrstone mill, aeropulverizer, homogenizer etc. and carry out dispersion treatment.Make colorant become the fine grained state with dispersion treatment, thereby realize improving the transmissivity of transmitted light and improve coating.

Preferably in a kind of like this system, carry out dispersion treatment, in this system, suitably use spreading agent, dispersing aiies such as dispersing adhesive resin, for example surfactant with colorant and solvent.Because macromolecule dispersing agent has excellent dispersion stability with time, so especially preferably use macromolecule dispersing agent.

For example, when using sand mill to carry out dispersion treatment, the preferred use has 0.05 millimeter beaded glass or zirconium oxide bead to several millimeters particle diameters.Temperature during dispersion treatment is set in 0～100 ℃ usually, the scope of preferred room temperature to 80 ℃.Regulate jitter time rightly, change because the suitable dispersion treatment time is formed the specification of equipment of (colorant, solvent and spreading agent) and sand mill etc. with printing ink.

Then adhesive resin, monomer, photopolymerization initiator system and other component are blended in the coloring printing ink that is obtained by above-mentioned dispersion treatment, to form uniform solution.Because usually having the fine grained foreign matter in each step of dispersion treatment and mixing sneaks in the solution, so the preferred solution that obtains with filtrations such as filtrators.

Embodiment

Explain the present invention in more detail below with reference to preparation example, embodiment and Comparative Examples, but be noted that without departing from the scope of the invention, the present invention is in no way limited to the following example.In the following example, " part " is meant " weight portion ".

(1) preparation backlight

(1-1) preparation example 1: backlight 1 preparation method

Prepare light-emitting device according to follow procedure.

The light emitting diode that to launch the light of 460nm through the small pieces welding process is connected the cover bottom of framework, couples together with the electrode of tinsel bonding method with light emitting diode and framework then.

Use Ca _2.97Ce _0.03Sc ₂Si ₃O ₁₂Phosphor and Ca as the light of transmitting green wave band _0.996Eu _0.004S is as the phosphor of the light of the red wave band of emission.They and epoxy resin are kneaded together obtaining paste, and this paste is coated on the light emitting diode in the cover, solidify.

Then, use wedge shape ring-type poly-olefin resin sheet (trade name " ZEONOR ", produce by ZeonCorporation) make light conductor, this resin sheet has the size of 289.6mm * 216.8mm, its thickness is that 2.0mm and minimum thickness are to change between the 0.6mm along short side direction at maximum ga(u)ge, the light source that will comprise above-mentioned light emitting diode is placed on the thick long limit, so that the thick side (light entrance face) that makes the light of linear light source emission enter light conductor effectively.

The trickle circular pattern of rough surface is transferred on the light exit surface opposite surfaces with light conductor to form pattern from mould, and the diameter of this circular pattern increases gradually with the distance of leaving linear light source.The diameter of rough surface pattern is 130 μ m near light source, increases gradually with distance from light source, and be 230 μ m at highest distance position.

The thick dry film photoresist of lamination 50 μ m on the SUS substrate, form opening with photoetching process in part corresponding to pattern, under the expulsion pressure of 0.3MPa, this mould is carried out uniform sandblast with the spherical glass pearl of #600 with sand-blast, after this peel off this dry film photoresist, make the mould of the trickle circular pattern that is used for forming rough surface like this.

Being equipped with drift angle on the light-emitting face of light conductor and being 90 ° and spacing is the prism array of 50 μ m, makes crestal line be approximately perpendicular to the light entrance face of light conductor, the structure of the optically focused of the light beam of the light conductor outgoing that is improved like this.Be coated with the stainless steel substrate of M nickel coating with single-crystal diamond cutting tool cutting through electroless-plating, thereby obtain the mould that in the forming of the collective optics array of forming by the prism array, uses.

With reflecting piece (" Lumirror E60L ", by TORAY Industries, Inc. production) be placed on a side opposite with the light-emitting face of light conductor, light diffusing sheet is placed on the light-emitting face, having drift angle with two is that 90 ° and spacing are the sheet (" BEFIII " of the prism array of 50 μ m, produce by Sumitomo 3M society) be placed on the light diffusing sheet, make the crestal line of these two prismatic lenses vertical mutually, thereby obtain backlight 1.Backlight 1 the relative luminescent spectrum that obtains like this is illustrated among Fig. 4.

(1-2) preparation example 2: backlight 2 preparation method

Prepare backlightly 2 in the mode identical with preparation example 1, different is to use Ca _0.992AlSiEu _0.008N _2.85O _0.15Phosphor as the light of launching red wave band.Backlight 2 the relative luminescent spectrum that obtains like this is illustrated among Fig. 5.

(1-3) preparation example 3: backlight 3 preparation method

Prepare in the mode identical with preparation example 1 backlight 3, the different Ca that are to use _0.99Ce _0.01Sc ₂O ₄As the phosphor of the light of transmitting green wave band, use Ca _0.992AlSiEu _0.008N _2.85O _0.15Phosphor as the light of launching red wave band.Backlight 3 the relative luminescent spectrum that obtains like this is illustrated among Fig. 6.

(1-4) preparation example 4: backlight 4 preparation method

Prepare backlightly 4 in the mode identical with preparation example 1, different is to use Sr _0.792Ca _0.2Eu _0.008AlSiN ₃Phosphor as the light of launching red wave band.Backlight 4 the relative luminescent spectrum that obtains like this is illustrated among Fig. 7.

(1-5) preparation example 5: backlight 5 preparation method

Prepare backlightly 5 in the mode identical with preparation example 1, different is to use Ca _2.94Ce _0.06Sc _1.94Mg _0.06Si ₃O ₁₂As the phosphor of the light of transmitting green wave band, use Sr _0.792Ca _0.2Eu _0.008AlSiN ₃Phosphor as the light of launching red wave band.Backlight 5 the relative luminescent spectrum that obtains like this is illustrated among Fig. 8.

(1-6) preparation example 6: backlight 6 preparation method

Prepare light-emitting device according to follow procedure.

The light emitting diode that to launch the light of 460nm with the small pieces welding process is connected the cover bottom of framework, couples together with the electrode of tinsel bonding method with light emitting diode and framework then.

Use Y _2.8Tb _0.1Ce _0.1Al ₅O ₁₂Phosphor as the light of launching yellow wave band.They and epoxy resin are kneaded together obtaining paste, and this paste is coated on the light emitting diode in the cover, solidify.

Obtain backlight 6 in the mode identical then with preparation example 1.Backlight 6 the relative luminescent spectrum that obtains like this is illustrated among Fig. 9.

(2) preparation example 7: the preparation of adhesive resin

In flask, pack into 20 parts and have 200 acid number and 5, the styrene-propene acid resin of 000 weight-average molecular weight, 0.2 part of p methoxy phenol, 0.2 part of chlorination dodecyl trimethyl ammonium and 40 parts of propylene glycol monomethyl ether, dropwise add 7.6 parts of acrylic acid (3 to it then, the 4-epoxycyclohexyl) methyl esters then reacted 30 hours under 100 ℃ temperature.Reactant liquor is placed in the water to precipitate again, and drying precipitated product again obtains resin.Carry out acid-base titration with KOH, the acid number of this resin is 80mg-KOH/g.

(3) preparation example 8: the preparation of resist solution

Mix following component with following ratio, stir these components with stirrer and dissolve fully, obtain resist solution like this up to these components.

The adhesive resin of preparation example 7 preparations: 2.0 parts

Dipentaerythritol acrylate: 1.0 parts

The photopolymerization initiator system:

2-(2 '-chlorphenyl)-4,5-diphenyl-imidazole: 0.06 part

2-mercaptobenzothiazole: 0.02 part

4,4 '-two (diethylamino) benzophenone: 0.04 part

Solvent (propylene glycol methyl ether acetate): 9.36 parts

Surfactant (" FC-430 " produced by Sumitomo 3M society): 0.0003 part

(4) preparation of color filter

(4-1) preparation example 9: the preparation of red pixel A～J

75 parts of propylene glycol methyl ether acetates, 16.7 parts of red pigment P.R.254 and 8.3 parts of carbamates dispersion resins are mixed, stirred 3 hours with stirrer, to make the mill base that solid component concentration is 25 weight %.The ball mill of the zirconium oxide bead by using 600 parts of 0.5mm diameters, peripheral speed 10m/s, the residence time is 3 hours, and this mill base is carried out dispersion treatment, thereby obtains the P.R.254 disperse ink.

Prepare another kind of mill base with the composition identical with the situation of above-mentioned P.R.254, different is, makes pigment into P.Y.139, is similarly carrying out dispersion treatment under the dispersion condition, and the residence time is 2 hours, thereby obtains the P.Y.139 disperse ink.

In addition, prepare another kind of mill base with the composition identical with the situation of above-mentioned P.R.254, different is to make pigment into P.R.177, is similarly carrying out dispersion treatment under the dispersion condition, and the residence time is 3 hours, thereby obtains the P.R.177 disperse ink.

Match ratio shown in the following table 1 (weight %) is mixed the resist solution of above-mentioned disperse ink that obtains and 8 preparations of above-mentioned preparation example, stir, add solvent (propylene glycol methyl ether acetate) obtaining the final solid component concentration of 25 weight % to it, thereby obtain the red color filter composition.

With spinner the red color filter that obtains is coated on composition on the glass substrate (" AN635 " produced by Asahi Glass society) of 10cm * 10cm, drying, making dry film thickness is 2.5 μ m.The whole surface of this substrate is exposed to 100mJ/cm ²Ultraviolet ray, develop with alkaline-based developer.Then this substrate is descended back roastings 30 minutes at 230 ℃ in baking oven, thereby make the red pixel sample A～J that measures usefulness.

Table 1

Red pixel	R254	R177	Y139	Colourless
					A	21.6	0.0	4.2	74.2
B	27.8	0.0	5.7	66.5
					C	27.0	0.0	1.9	71.1
D	40.2	0.0	0.0	59.8
					E	30.3	2.4	0.0	67.3
F	38.1	5.3	0.0	56.6
					G	26.9	5.0	0.0	68.2
H	26.9	4.2	0.0	69.0
					I	24.0	12.2	0.0	63.8
J	29.6	19.4	0.0	51.0

(4-2) preparation example 10: the preparation of green pixel A～J

Prepare mill base with the composition identical with the situation of the P.R.254 of preparation example 9, different is to make pigment into P.G.36, is similarly carrying out dispersion treatment under the dispersion condition, and the residence time is 1 hour, thereby obtains the P.G.36 disperse ink.

Prepare another kind of mill base with the composition identical with preparation example 9, different is to make pigment into P.Y.150, is similarly carrying out dispersion treatment under the dispersion condition, and the residence time is 2 hours, thereby obtains the PY.150 disperse ink.

Match ratio shown in the following table 2 (weight %) is mixed the resist solution of above-mentioned disperse ink that obtains and 8 preparations of above-mentioned preparation example, stir, add solvent (propylene glycol methyl ether acetate) obtaining the final solid component concentration of 25 weight % to it, thereby obtain the green color filter composition.

With spinner the color filter that obtains is coated on 10cm * 10cm glass substrate (" AN635 " produced by Asahi Glass society) with composition, drying, making dry film thickness is 2.5 μ m.The whole surface of this substrate is exposed to 100mJ/cm ²Ultraviolet ray, develop with alkaline-based developer.Then, this substrate descends back roastings 30 minutes at 230 ℃ in baking oven, thereby makes the green pixel sample A～J that measures usefulness.

Table 2

Green pixel	G36	Y150	Y139	Colourless
					A	14.0	14.0	0.5	71.5
B	33.0	8.3	2.7	56.0
					C	14.9	14.9	0.2	70.0
D	34.8	8.7	2.6	53.9
					E	15.9	11.1	0.0	73.0
F	35.0	14.7	0.0	50.3
					G	27.5	11.6	0.0	61.0
H	27.8	10.7	0.0	61.6
					I	46.7	7.8	0.0	45.5
J	56.5	5.3	0.0	38.2

(4-3) preparation example 11: the preparation of blue pixel A～J

Prepare mill base with the composition identical with the situation of the P.R.254 of preparation example 9, different is to make pigment into P.G.15:6, is similarly carrying out dispersion treatment under the dispersion condition, and the residence time is 1 hour, thereby obtains the P.G.15:6 disperse ink.

Prepare another kind of mill base with the composition identical with the situation of the P.R.254 of preparation example 9, different is to make pigment into P.V.23, is similarly carrying out dispersion treatment under the dispersion condition, and the residence time is 2 hours, thereby obtains the P.V.23 disperse ink.

Match ratio shown in the following table 3 is mixed the resist solution of above-mentioned disperse ink that obtains and 8 preparations of above-mentioned preparation example, stir, add solvent (propylene glycol methyl ether acetate) obtaining the final solid component concentration of 25 weight % to it, thereby obtain the blue color filter composition.

With spinner the color filter that obtains is coated on 10cm * 10cm glass substrate (" AN635 " produced by Asahi Glass society) with composition, drying, making dry film thickness is 2.5 μ m.The whole surface of this substrate is exposed to 100mJ/cm ²Ultraviolet ray, develop with alkaline-based developer.This substrate descends back roastings 30 minutes at 230 ℃ in baking oven then, thereby makes the blue pixel sample A～J that measures usefulness.

Table 3

Blue pixel	B15:6	V23	Colourless
				A	10.8	8.0	81.2
B	20.1	4.4	75.5
				C	10.5	8.0	81.5
D	19.7	4.4	75.9
				E	11.3	7.1	81.6
F	21.6	3.5	74.9
				G	11.7	6.5	81.9
H	12.5	6.0	81.6
				I	16.1	3.9	80.0
J	31.7	0.0	68.3

(4-4) preparation of color filter A～J

Make up above-mentioned redness, green and blue pixel with preparation color filter A～J with same letter.

According to following method, with using the backlight and color filter A～J combination of the LED shown in the preparation example 1～6, to measure colour gamut and brightness (colour temperature).The result is illustrated in the table 4.

Embodiment 1～8 and Comparative Examples 1～2

For each red pixel sample, green pixel sample and the blue pixel sample shown in the above-mentioned preparation example, measure transmitted spectrum with spectroanalysis instrument (" U-3500 " produced by the Hitachi).In addition, measure luminescent spectrum backlight with brightness tester (" CS-1000 ", by Konica Minolta Holdings, Inc. produces).

Calculate colourity (x, y, Y) according to transmitted spectrum that obtains and luminescent spectrum backlight.Value Y correspondence employed luminescence efficiency backlight.

The result is illustrated in the table 4.The value Y of white represents the luminescence efficiency backlight as whole display in the table.

As shown in table 4, when the display of the high colour gamut of design EBU standard NTSC number percent (72% NTSC number percent) or 85%, use conventionally when backlight, value Y will significantly reduce, yet use technology of the present invention can obtain high value Y.That is to say, can obtain higher brightness with low power consumption.

In addition, embodiment 1,3,5,7 and each color filter of 8 are at the mean value T of the spectral-transmission favtor at the wavelength place of every interval 5nm of 460nm～480nm ⁸(460-480) be at the most 63.5%.Therefore, reduce in the situation of light that wavelength is 460nm～480nm, use the color filter of embodiment 1,3,5,7 or 8 can reach this requirement at needs.

In addition, use the test pattern mask at 100mJ/cm ²Versicolor color filter to preparation in above-mentioned preparation example 6～11 exposes with the coated film of composition down, develops, and confirms all to have obtained good pattern at all samples.

The formula (1) of " * " unabridged version instructions with thumb down, (2), (5) or (6).

Industrial usability

According to the present invention, even use LED-backlit, also can not sacrifice the brightness of image and realize the reproduction of peony and green image. In addition, use corresponding above-mentioned peony and green blue resist and colour filter, can obtain the high colour gamut of whole image. And, by carrying out redness, green and blue-light-emitting with a chip, can not sacrifice in the situation that production efficiency is installed, a kind of color image display device of easy adjusting white balance is provided. Therefore, in the fields such as colour filter composition, colour filter, color image display device, industrial usability of the present invention is very high.

This with referring to mode introduce the full content of instructions, claims, accompanying drawing and summary of Japanese patent application 2004-199851 number of Japanese patent application 2004-129417 number submitted on April 26th, 2004 and submission on July 6th, 2004.

Claims (12)

1. color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, be used for the combination that described light source backlight comprises blueness or mazarine LED and phosphor, and in each wavelength region may of 430nm～470nm, 500nm～540nm and 600nm～680nm, all has at least a luminous major constituent, the NTSC number percent of the colour gamut of coloured image display element is at least 60%, and, work as λ _nNm represents the wavelength of every interval 5nm in 380nm～780nm visible-range, T ^R(λ _n) represent that the red pixel of this color filter is in wavelength X _nThe spectral-transmission favtor at nm place (%), I (λ _n) expression from backlight in wavelength X _nDuring the relative luminous intensity of the total luminous intensity standardization of quilt at nm place, these parameters satisfy following condition (1):

I(620-680)×T ^R(620-680)≥1.1 (1)

T wherein ^R(620-680) and I (620-680) be illustrated respectively in 620nm≤λ _nThe all relative luminous intensity of the average transmittance at≤680nm place (%) peace, I (λ _n) be defined as follows:

$s\left({\mathrm{\&lambda;}}_n\right)=\frac{{\&Integral;}_{{\mathrm{\&lambda;}}_n+\mathrm{\&Delta;\&lambda;}/2}^{{\mathrm{\&lambda;}}_n+\mathrm{\&Delta;\&lambda;}/2}s\left(\mathrm{\&lambda;}\right)\mathrm{d\&lambda;}}{\mathrm{\&Delta;\&lambda;}}$

$I\left({\mathrm{\&lambda;}}_n\right)=\frac{s\left({\mathrm{\&lambda;}}_n\right)}{\underset{\mathrm{\&lambda;}=380}{\overset{780}{\mathrm{\&Sigma;}}}s\left({\mathrm{\&lambda;}}_n\right)}$

In the formula, S (λ) expression is from the measured value of luminous intensity in af at wavelength lambda backlight, Δ λ=5nm.

2. color image display device as claimed in claim 1, wherein, color filter also satisfies following condition (2):

T ^R(560-580)≥15％ (2)

T wherein ^R(560-580) the expression color filter is at 560nm≤λ _nThe average transmittance of≤580nm (%).

3. color image display device as claimed in claim 1 or 2, wherein, backlight have phosphor layer or a phosphor film, and this phosphor layer or phosphor film contain the phosphor of useful europium activation.

4. color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, be used for the combination that described light source backlight comprises blueness or mazarine LED and phosphor, and in each wavelength region may of 430nm～470nm, 500nm～540nm and 600nm～680nm, all has at least a luminous major constituent, the NTSC number percent of the colour gamut of coloured image display element is at least 60%, and, work as λ _nNm represents the wavelength of every interval 5nm in 380～780nm visible-range, T ^G(λ _n) expression by the green pixel of this color filter in wavelength X _nThe spectral-transmission favtor at nm place (%), I (λ _n) expression from backlight in wavelength X _nDuring the relative luminous intensity of the total luminous intensity standardization of quilt at nm place, these parameters satisfy following condition (5) and (6):

I(500-530)×T ^G(500-530)≥1.2 (5)

T ^G(580-600)≥20％ (6)

T wherein ^G(500-530), T ^G(580-600) and I (500-530) be illustrated respectively in 500nm≤λ _n≤ 530nm and 580nm≤λ _nThe average transmittance at≤600nm place (%) and at 500nm≤λ _nThe average relative luminous intensity at≤530nm place, I (λ _n) identical with the definition in the claim 1.

5. color image display device as claimed in claim 4, wherein, backlight have phosphor layer or a phosphor film, and this phosphor layer or phosphor film contain the phosphor of useful cerium and/or europium activation.

6. color image display device, described color image display device comprises light valve, have corresponding to the color filter of the color element of red at least, green and blue three kinds of colors of this light valve and transillumination with combination backlight, wherein, be used for the combination that described light source backlight comprises blue led and phosphor, and all have at least a luminous major constituent in each wavelength region may of 430nm～470nm, 500nm～540nm and 600nm～680nm, the NTSC number percent of the colour gamut of coloured image display element is at least 60%.

7. color image display device as claimed in claim 6, wherein, colour temperature is 5,000K～10,000K.

8. as claim 6 or 7 described color image display devices, described color filter has the pixel that adopts color filter to form with blue composition, described color filter comprises adhesive resin (a) and/or monomer (b) and colorant (c) with blue composition, the wavelength place of every interval 5nm in the scope of 460nm～480nm wherein, the mean value T of the spectral-transmission favtor of the cured product of described blue composition ^B(460-480) (%) is at the most 65%, and described blue composition contains dioxazine purple pigment and copper phthalocyanine as colorant (c), and with respect to all pigment, the content of dioxazine purple pigment is at least 25 weight %.

9. as claim 1 or 6 described color image display devices, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound by following formula (3) expression:

Eu _aCa _bSr _cM _dS _e (3)

Wherein M represents to be selected from least a element of Ba, Mg and Zn, and a～e is respectively the numerical value in the following scope:

0.0002≤a≤0.02；

0.3≤b≤0.9998；

D is 0≤d≤0.1;

a+b+c+d＝1；

0.9≤e≤1.1。

10. as claim 1 or 6 described color image display devices, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound that contains element M 4, elements A, element D, element E and element X at least, wherein, M ⁴Be to be selected from a kind of or at least two kinds of elements in the group of being made up of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb and to contain Eu at least, A is selected from by being different from element M ⁴The group formed of divalent metal element in a kind of or at least two kinds of elements, D is a kind of or at least two kinds of elements that are selected from the group of being made up of the tetravalent metal element, E is a kind of or at least two kinds of elements that are selected from the group of being made up of trivalent metallic element, and X is a kind of or at least two kinds of elements that are selected from the group of being made up of O, N and F.

11. as claim 4 or 6 described color image display devices, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound by following formula (7) expression, described compound comprises the composite oxides that contain divalence, trivalent and tetravalent metal element and makes fertile material, contains Ce in the described fertile material at least as the activator element:

M ¹ _a’M ² _b’M ³ _c’O _d’ (7)

M wherein ¹, M ²And M ³Represent divalent metal element, trivalent metallic element and tetravalent metal element respectively, a '～d ' is the numerical value in the following scope:

2.7≤a’≤3.3；

1.8≤b’≤2.2；

2.7≤c’≤3.3；

11.0≤d’≤13.0。

12. as claim 4 or 6 described color image display devices, wherein, described have phosphor layer or phosphor film backlight, described phosphor layer or phosphor film contain the compound by following formula (8) expression:

M ⁵ _kM ⁶ _lM ⁷ _mO _n (8)

M wherein ⁵, M ⁶And M ⁷Expression contains activator element, divalent metal element and the trivalent metallic element of Ce at least respectively, and k～n is respectively the numerical value in the following scope:

0.0001≤k≤0.2；

0.8≤1≤1.2；

1.6≤m≤2.4；

3.2≤n≤4.8。

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