CN101126826A - Color filter and liquid crystal display - Google Patents
Color filter and liquid crystal display Download PDFInfo
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- CN101126826A CN101126826A CNA2007101616561A CN200710161656A CN101126826A CN 101126826 A CN101126826 A CN 101126826A CN A2007101616561 A CNA2007101616561 A CN A2007101616561A CN 200710161656 A CN200710161656 A CN 200710161656A CN 101126826 A CN101126826 A CN 101126826A
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Abstract
The utility model relates to a color filter and a liquid crystal display device, wherein the color filter comprises a first side, a base plate of a second side opposite to the first side, a blue light blockage formed at the first side of the base plate and a transparent conduction layer partially at least covered on the blue light blockage. A blue light penetration zone is defined on the transparent conduction layer covered on the blue light blockage. When a standard C light source is arranged on the second side of the base plate for providing light ray, the light ray with 380 to 780 nanometer (nm) of wavelength is substantially to display a first blue chromaticity coordinate (By 1) after penetrating the blue light blockage and the transparent conduction layer, and is less than or equal to 0.08 substantially. The first blue chromaticity coordinate (By 1) is also worked out by measuring the penetration frequency spectrum of the blue light penetration zone and collocating the penetration frequency spectrum with a standard C light source spectrometer, and is less than or equal to 0.08 substantially. The utility model has an advantage of the effectiveness for increasing blue light saturation on the color filter.
Description
Technical field
The present invention is relevant for a kind of colored filter; More specifically, the present invention is meant a kind of colored filter that is used to increase the color saturation of LCD.
Background technology
LCD becomes in the daily life gradually in order to show the main display device of various information.Its color display mode is to provide light source by the backlight module of inside or the background light of outside earlier, show (gray scale) by chip for driving (drive IC) and liquid crystal (liquid crystal) control light to form GTG, then make the photoresistance that passes red, green, blue three looks on the colored filter (color filter) through the light of GTG adjustment, to produce the light of Red Green Blue respectively.At last, the usage space mixed-color method makes ruddiness, green glow, blue light colour mixture to reach the colorize effect, can form the colored display frame of a width of cloth.
For the colored display frame that makes LCD has high color saturation (saturation) and high colorrendering quality, generally can strengthen ruddiness, green glow, the blue light color saturation degree of LCD screen respectively.With reference to the international standard illumination council (CIE) after the chromaticity coordinate of formulating in 1931 (CIE1931) as can be known, increase the green light color saturation degree and can promote color saturation.Yet this chromaticity coordinate of CIE1931 does not conform to the susceptibility of human eye for color; Otherwise the chromaticity coordinate (CIE1976) of international standard illumination council formulation in 1976 is more close with the color sensitivity degree side of human eye.And in the chromaticity coordinate of CIE1976, can find, increase the blue light color saturation degree and have more substantial effect for promoting the color saturation that LCD presented, and can the actual demonstration receiving end of fluid,matching crystal display (being human eye).
Therefore, industry is the color saturation that main means improve LCD to increase the blue light color saturation degree gradually at present.Strengthen now in the usual way of blue light color saturation degree, adopt pigment concentration that promotes the blue photoresistance on the colored filter or the thickness that increases blue photoresistance mostly.With the former, if increase the pigment concentration of blue photoresistance, to make the sensing optical activity concentration of material in the photoresistance reduce relatively, the coating stability of photoresistance is not enough, and further make blue photoresistance to the exposure and the reaction passivation of developing, cause blue photoresistance to residue in unscheduled zone, influence the optical filtering correctness of colored filter.In addition, increase the pigment concentration of blue photoresistance, other additive concentration in the blue photoresistance will be reduced relatively, cause the material behavior of blue photoresistance not good (for example hardness reduction), even cause the various technological problemses (for example aberration or uniform film thickness degree are not good) of colored filter, and then reduce the qualification rate of colored filter.With the latter,, cause qualification rate to reduce in case increase the manufacture craft problem that the thickness of blue photoresistance will reduce the penetrability of blue light or cause colored filter.Moreover, no matter promote the pigment concentration of blue photoresistance or thicken the thickness of blue photoresistance, all can increase the financial cost of colored filter.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of colored filter is provided, and it can improve the blue light color saturation degree, thereby improves or overcome now in order to strengthen one or the multinomial disappearance that means had of blue light color saturation degree.
Technical solution of the present invention is: the present invention at first provides a kind of colored filter, one blue photoresistance of first side that it comprises a substrate with one first side and one second side relative with first side, be formed at substrate and at least the part be covered in a transparency conducting layer on the blue photoresistance, and define a blue light penetrating region thereon.Wherein, when second side of substrate is provided with a standard C light source, be essentially the light of the wavelength of 380 to 780 nanometers (nm), after penetrating blue photoresistance and transparency conducting layer, the suitable one first chroma blue coordinate (By that can present in the XYZ colour system (XYZ color system)
1), and be less than or equal to 0.08 in fact.Also can be the frequency spectrum that penetrates that measures the blue light penetrating region, this is penetrated frequency spectrum collocation standard C light source spectrometer calculate the first chroma blue coordinate (By in the XYZ colour system (XYZ color system)
1), and be less than or equal to 0.08 in fact.
Secondly, the present invention also provides a kind of LCD, and it comprises: a colored filter and a light source.One blue photoresistance of first side that colored filter comprises a substrate with one first side and one second side relative with first side, be formed at substrate and at least the part be covered in a transparency conducting layer on the blue photoresistance, and define a blue light penetrating region thereon.Light source is located at second side of substrate, in order to provide light that a wavelength is essentially 380 to 780 nanometers (nm) to blue photoresistance and transparency conducting layer.Wherein, the blue light penetrating region is fitted the one first chroma blue coordinate (By that can present in the XYZ colour system (XYZ color system) behind blue photoresistance of light penetration and transparency conducting layer
1), be less than or equal to 0.08 in fact.Also can be the frequency spectrum that penetrates that measures the blue light penetrating region, this is penetrated frequency spectrum collocation standard C light source spectrometer calculate the first chroma blue coordinate (By in the XYZ colour system (XYZ color system)
1), and be less than or equal to 0.08 in fact.
Characteristics of the present invention and advantage are: as shown in the above description, by improving the blue light color saturation degree that colored filter presented, just can make LCD present preferable color saturation.The present invention makes colored filter be presented higher blue light color saturation degree by improving the penetrance of colored filter for blue light.That is, the thickness of transparency conducting layer is in certain limit in the major control colored filter of the present invention, this moment, Sicorten arrived higher colored filter blue light penetrance, when blue light penetrated the amount raising of colored filter, just can present higher blue light color saturation degree.And, if the blue photoresistance that collocation has suitable concentration, then can effectively increase the blue light color saturation degree of colored filter and further reduce the financial cost of colored filter, and reduce the degree of difficulty of manufacture craft, need not to change the composition of blue photoresistance and the physical property that influences photoresistance.
Description of drawings
Fig. 1 is the cut-away section synoptic diagram of colored filter of the present invention; And
Fig. 2 is the thickness of transparency conducting layer and the graph of a relation of blue light penetrance.
Embodiment
For technique scheme of the present invention, characteristics and advantage can be become apparent, hereinafter be elaborated with the preferred embodiment conjunction with figs..
In colored filter, transparency conducting layer generally is influenced by the thickness of transparency conducting layer for the penetrance of light.When its thickness is relatively thin, the light with short wavelength will have high relatively penetrance.On the other hand, by tradition to the definition of blue light as can be known, blue light has short wavelength with respect to the visible light of other color.Therefore, the present invention will be means with the thickness that reduces transparency conducting layer, so that the raising of the blue light penetrance of colored filter, and improve blue excitation simultaneously, so that light presents a high blue light color saturation degree by behind the colored filter.Below will major technique content of the present invention be described with an embodiment, wherein the assembly that has nothing to do with the present invention has omitted and has not specified, the personage who has the knack of correlation technique considers the technology contents in this exposure in light of actual conditions, when thinking and various different embodiment.
At first with reference to figure 1, colored filter 1 includes a substrate 11, one blue photoresistance 13a, a red photoresistance 13b, a green photoresistance 13c and a transparency conducting layer 15.Substrate 11 has one first side 111 and one second side 113 relative with first side 111, and red photoresistance 13b, green photoresistance 13c and blue photoresistance 13a then are formed at first side 111 of substrate 11.Usually, the thickness of red photoresistance 13b and green photoresistance 13c does not limit, and blue photoresistance 13a, red photoresistance 13b and green photoresistance 13c three's relative position does not limit.Colored filter 1 comprises a black matrix" 19, and (Black Matrix BM), is distributed in red photoresistance 13b, green photoresistance 13c and blue photoresistance 13a and appoints the two, so that cover unnecessary light.
Transparency conducting layer 15 is generally an indium tin oxide (Indium Tin Oxide, ITO) layer.For ease of explanation, present embodiment be with the indium tin oxide layer be transparency conducting layer 15 for example describes, in other embodiment, known this operator also can adopt other material with alternative.Transparency conducting layer 15 is covered on red photoresistance 13b, green photoresistance 13c and the blue photoresistance 13a at least.Generally speaking, transparency conducting layer 15 is to be covered in continuously on aforementioned photoresistance 13a of all kinds, 13b, the 13c.In addition, with respect to aforementioned photoresistance 13a of all kinds, 13b, 13c, transparency conducting layer 15 tops define a ruddiness penetrating region 17b, a green glow penetrating region 17c and a blue light penetrating region 17a respectively.When a light when second side 113 of substrate 11 is passed through colored filter 1, will produce ruddiness, green glow and blue light respectively at ruddiness penetrating region 17b, green glow penetrating region 17c and blue light penetrating region 17a.
When Fig. 2 explanation is respectively 90 nanometers (nm), 120 nanometers (nm), 135 nanometers (nm) and 145 nanometers (nm) when the thickness of transparency conducting layer 15 (being the ITO layer), light pass all thickness transparency conducting layer 15 penetrate frequency spectrum.Can find that by Fig. 2 when the thickness of transparency conducting layer 15 during between in 90 to 135 nanometers (nm), transparency conducting layer 15 has the higher penetrating rate for short wavelength's (wavelength is between 380 to 530 nanometers) of visible light.In present embodiment, when light penetration transparency conducting layer 15, it is defined to come down between 50% to 99% than high penetration.If make the thickness of the transparency conducting layer 15 among the blue light penetrating region 17a in fact between 90 to 135 nanometers (nm), transparency conducting layer 15 among the blue light penetrating region 17a can present the blue light penetrance of a maximum, and have higher blue excitation simultaneously, and make colored filter 1 be presented bigger blue light color saturation degree.Be noted that each one-tenth-value thickness 1/10 of above-mentioned transparency conducting layer 15 all is in order to explanation, but the present invention is as limit, the one-tenth-value thickness 1/10 of transparency conducting layer can cooperate other implementation condition of colored filter and change.
In addition, the blue light color saturation degree is removed outside the Pass thickness with transparency conducting layer 15 has, and is also relevant with the character (for example penetrance, concentration, thickness) of blue photoresistance 13a.
Table 1 is illustrated under the standard C light source, makes colored filter 1 present one first chroma blue coordinate (By
1) situation under, the thickness of transparency conducting layer 15 (being the ITO layer) and the second chroma blue coordinate (By of blue photoresistance 13a
2) relation.Particularly, be provided with a light source 21 in second side 113 of substrate 11, light source 21 is a standard C light source.Disperse the light of the wavelength that is essentially 380 to 780 nanometers (nm) when light source 21, after penetrating blue photoresistance 13a and transparency conducting layer 15, just can make colored filter 1 present one first chroma blue coordinate (By in the XYZ colour system (XYZ color system)
1), it is less than or equal to 0.08 in fact, and the preferably is less than or equal to 0.077 in fact.Also can be and measure the light penetrate blue photoresistance 13a and transparency conducting layer 15 and penetrate frequency spectrum, this is penetrated frequency spectrum collocation standard C light source spectrometer calculate the first chroma blue coordinate (By
1), and being less than or equal to 0.08 in fact, the preferably is less than or equal to 0.077 in fact.And after if light only penetrates blue photoresistance 13a, the then suitable one second chroma blue coordinate (By that presents in the XYZ colour system (XYZ color system)
2), it is in fact between 0.065 to 0.085, and the preferably is in fact between 0.07 to 0.08.Only also can be and to measure the light that penetrates blue photoresistance 13a and penetrate frequency spectrum, this is penetrated frequency spectrum collocation standard C light source spectrometer calculate the second chroma blue coordinate (By
2), it is in fact between 0.065 to 0.085, and the preferably is in fact between 0.07 to 0.08.
Table 1
| Group | By 1 | ITO layer thickness (nm) | By 2 | Blue photoresistance concentration or thickness |
| The 1st group | 0.076 | 135 | 0.075 | - |
| The 2nd group | 0.076 | 120 | 0.077 | 97.35% (with respect to the 1st group) |
| The 3rd group | 0.076 | 90 | 0.078 | 94.74% (with respect to the 1st group) |
Because the second blue excitation positive correlation that is presented when the concentration of blue photoresistance 13a or film thickness and light penetration blueness photoresistance 13a, therefore, in the 1st group, the concentration low blue photoresistance (that is relatively not blue blue photoresistance) of healing, the second chroma blue coordinate (By in the XYZ colour system that it presents (XYZ color system)
2) higher.And cooperate the second chroma blue coordinate (By of different blue photoresistances
2), adopt the ITO layer thickness of different-thickness, just can make the light that penetrates behind blue photoresistance 13a and the transparency conducting layer 15 reach the first identical chroma blue coordinate (By
1).
Hence one can see that, the first chroma blue coordinate (By that further provides suitable blue photoresistance concentration that colored filter 1 is presented to wish to get
1).So, can utilize the transparency conducting layer 15 of thinner thickness to cooperate the blue photoresistance 13a of suitable concentrations and the first chroma blue coordinate (By that colored filter 1 presented wish to get
1), and reduce the financial cost of colored filter 1 thus and reduce the degree of difficulty of technology.
To adopt the colored filter 1 of different-thickness ITO layer to be applied in the LCD, and the colored filter 1 tool first chroma blue coordinate (By
1), it is less than or equal to 0.08 in fact, and the preferably is less than or equal to 0.077 in fact, and this LCD comprises an aforesaid colored filter 1 and a light source 21, and light source 21 can be general backlight module light source.Can find that the LCD that adopts each to organize all presents one and is less than or equal to 0.06 the 3rd chroma blue coordinate (By in fact
3), as shown in table 2.
Table 2
| Group | The thickness of ITO layer (nm) | By 3 |
| The 1st group | 90 | 0.056 |
| The 2nd group | 120 | 0.057 |
| The 3rd group | 135 | 0.059 |
In sum, the present invention can effectively be applied to colored filter by the thickness of control transparency conducting layer, with the effect of the blue light color saturation degree that reaches above-mentioned increase colored filter.If the blue photoresistance that collocation has suitable concentration, then can effectively increase the blue light color saturation degree and the further financial cost that reduces colored filter of colored filter, and reduce the degree of difficulty of manufacture craft, the physical property that need not to change the composition of blue photoresistance and influence photoresistance, so colored filter of the present invention can be promoted the color saturation of LCD, real tool industrial utilization really.
The foregoing description only is illustrative principle of the present invention and effect thereof, and explains technical characterictic of the present invention, but not is used to limit protection category of the present invention.Any personage who is familiar with present technique person all can be under the situation of know-why of the present invention and spirit, can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated.Therefore, the scope of the present invention should be listed as claim.
Claims (10)
1. a colored filter is characterized in that, this colored filter comprises:
One substrate has one first side and one second side relative with this first side;
One blue photoresistance is formed at this first side of this substrate; And
One transparency conducting layer, the part is covered on this blueness photoresistance at least, and defines a blue light penetrating region; Wherein, this blue light penetrating region of this colored filter one first chroma blue coordinate that can present in the XYZ colour system is less than or equal to 0.08.
2. colored filter as claimed in claim 1 is characterized in that, this first chroma blue coordinate is less than or equal to 0.077.
3. colored filter as claimed in claim 1 is characterized in that, in this blue light penetrating region, after a light penetration of standard C light source should the blueness photoresistance, suitablely can present one second chroma blue coordinate in the XYZ colour system between 0.065 to 0.085.
4. colored filter as claimed in claim 3 is characterized in that, this second chroma blue coordinate is between 0.07 to 0.08.
5. colored filter as claimed in claim 1 is characterized in that, the thickness of this transparency conducting layer in this blue light penetrating region is between 90 to 135 nanometers.
6. colored filter as claimed in claim 1 is characterized in that, this transparency conducting layer is an indium tin oxide layer.
7. colored filter as claimed in claim 1 is characterized in that, this light penetration should the defined maximum penetration rate of blueness penetrating region be between 50% to 99%.
8. colored filter as claimed in claim 1 is characterized in that, this colored filter comprises a red photoresistance and a green photoresistance, is formed at this first side of this substrate respectively, and defines a ruddiness penetrating region and a green glow penetrating region respectively; Wherein this transparency conducting layer is covered on this redness photoresistance, this blueness photoresistance and this green photoresistance continuously.
9. a LCD is characterized in that, this LCD comprises:
One colored filter, this colored filter comprises:
One substrate has one first side and one second side relative with this first side;
One blue photoresistance is formed at this first side of this substrate; And
One transparency conducting layer, the part is covered on this blueness photoresistance at least, and defines a blue light penetrating region; And
One light source is located at this second side of this substrate, is that the light of 380 to 780 nanometers is to this blueness photoresistance and this transparency conducting layer in order to a wavelength to be provided;
Wherein, this blue light penetrating region is after the light that the standard C light source produces penetrates this blueness photoresistance and this transparency conducting layer, and the suitable one first chroma blue coordinate that can present in the XYZ colour system is less than or equal to 0.08.
10. LCD as claimed in claim 9 is characterized in that, this first chroma blue coordinate is less than or equal to 0.077 under the standard C light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101616561A CN101126826A (en) | 2007-09-27 | 2007-09-27 | Color filter and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101616561A CN101126826A (en) | 2007-09-27 | 2007-09-27 | Color filter and liquid crystal display |
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| Publication Number | Publication Date |
|---|---|
| CN101126826A true CN101126826A (en) | 2008-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101616561A Pending CN101126826A (en) | 2007-09-27 | 2007-09-27 | Color filter and liquid crystal display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323636A (en) * | 2011-04-28 | 2012-01-18 | 友达光电股份有限公司 | Blue photoresist, color filter substrate using same and display device |
-
2007
- 2007-09-27 CN CNA2007101616561A patent/CN101126826A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323636A (en) * | 2011-04-28 | 2012-01-18 | 友达光电股份有限公司 | Blue photoresist, color filter substrate using same and display device |
| CN102323636B (en) * | 2011-04-28 | 2013-05-22 | 友达光电股份有限公司 | Blue photoresist, color filter substrate using same and display device |
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