CN102763232A - White led for backlight of full-color liquid crystal display device, backlight for full-color liquid crystal display device, and full-color liquid crystal display device - Google Patents
White led for backlight of full-color liquid crystal display device, backlight for full-color liquid crystal display device, and full-color liquid crystal display device Download PDFInfo
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- CN102763232A CN102763232A CN2011800097410A CN201180009741A CN102763232A CN 102763232 A CN102763232 A CN 102763232A CN 2011800097410 A CN2011800097410 A CN 2011800097410A CN 201180009741 A CN201180009741 A CN 201180009741A CN 102763232 A CN102763232 A CN 102763232A
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- light
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- liquid crystal
- emitting
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- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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Abstract
Disclosed is a white LED for a backlight of a full-color liquid crystal display device, comprising a light emitting element that discharges a primary light, having a light emitting peak within a wavelength region of 360-430nm; and a fluorescent light body layer, including a blue fluorescent light body that is excited by the primary light and emits blue light, a green fluorescent light body that is excited by the primary light and emits green light, and a red fluorescent light body that is excited by the primary light and emits red light having two or more linear light emitting peaks within a wavelength region of 580-740nm. When the liquid crystal display device that is produced employing the white LED represents color reproduction regions of emitted light color of the liquid crystal display device with (u', v') values of an L*u*v* display color chromaticity diagram, the chroma points of each primary color of the light emitting colors of blue, green, and red are respectively within a range of +-0.02, inclusive, of the chroma points of each primary color, blue, green, and red, of ITU-R BT.709.
Description
Technical field
Execution mode of the present invention relate to be suitable as with the White LED of using as the backlight of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard of high definition playing standard, the backlight that has used this White LED and with the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard.
Background technology
In the past, in average family,, used full-color liquid crystal indicator more and more widely as the display unit of TV, PC etc.And the master monitor of using for TV and Radio Service, the on-the-spot monitor that uses of video production; Owing to can obtain the high quality images quality at aspects such as gray scale demonstration, contrast ratio, animation display, up to the present use Braun tube (CRT: display cathode ray tube) always.
Yet along with the rise of slim panel display in recent years, the production of CRT itself is about to away be at the end.Therefore, particularly on-the-spot in units concerned of TV and Radio Service, making video, CRT is replaced by full-color liquid crystal indicator gradually, but full-color liquid crystal indicator exist the color reproduction zone narrow, from the low problem of reproducibility of the color of luminescent spectrum.So, urgent hope to have the color reproduction zone wide and can reproduce monitor fully from the color of luminescent spectrum.
In playing,, on the video picture picture, reproduce form, action, the tone of being taken the photograph body through the operation of shooting (colour TV camera), transmission, video picture with color CRT.Owing to as above-mentioned, there are a plurality of operations, the transmission means of picture signal that therefore comprises tone in color CRT in broadcast is by standardization.The representative standard of this standard is a NTSC (National Television System Committee: standard of National Television System Committee) formulating and EBU (European Broadcasting Union: the standard of European Broadcasting Union) formulating.
In fields such as above-mentioned broadcast, in the past, the colour gamut that can in CRT, show, 72% the EBU standard that promptly is equivalent to the colour gamut of NTSC (international standard that shows desirable color reproduction zone) were used as standard and used.But, be the epoch of digital signal afterwards, the primary color points that the colour gamut of HDTV (high definition TV broadcast) becomes with ITU-R ITU-R BT.709 standard is the colour gamut of standard.The colour gamut of ITU-RBT.709 standard normally be equivalent to NTSC colour gamut 72%, promptly be equivalent to 100% colour gamut of the colour gamut of EBU standard.
So, carried out in recent years with the mode that meets the ITU-R BT.709 standard of in fields such as broadcast, using design full-color liquid crystal indicator, in full-color liquid crystal indicator, to obtain the trial with the equal picture quality of CRT monitor.In addition, in order to realize this trial, the exploitation that meets the good colour filter of the colorrendering quality of ITU-R BT.709 standard, backlight etc. has also obtained progress.
The prior art document
Non-patent literature
Patent Document 1: The Institute of Image Information and Television イ ア Society, "Image Information and Television イ ア Society" Institute of Image Information and Television イ ア Society, 2006, Vol.60, No.11, pp.1749-1754
Summary of the invention
The technical problem that invention will solve
In full-color liquid crystal indicator, regional as the colorrendering quality of display unit by the combination decision of backlight and colour filter.Up to the present, about colour filter, having developed some is the colour filter of purpose with the colorrendering quality that acquisition meets ITU-R BT.709 standard.But there is following problem: also do not pass and these colour filters make up the backlight that the full-color liquid crystal indicator of the colorrendering quality of realizing meeting ITU-R BT.709 standard is used.
The present invention accomplishes in order to obtain the high full-color liquid crystal indicator of the picture quality identical with CRT monitor, its purpose be to provide the colorrendering quality of realizing meeting ITU-R BT.709 standard full-color liquid crystal indicator backlight with White LED, used the full-color backlight for liquid crystal display of this White LED and used this backlight with the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard.
The means that are used for the technical solution problem
The backlight of the full-color liquid crystal indicator of execution mode of the present invention is the technical scheme that is used to address the above problem with White LED; It is characterized in that; Possess: light-emitting component; Its ejaculation has 1 light of glow peak in the wavelength region may of 360 ~ 430nm, and is at least a kind that is selected from ultraviolet LED, bluish violet light-emitting diode, luminescence-utraviolet laser and the bluish violet emitting laser; And luminescent coating; The red-emitting phosphors that it comprises the blue emitting phophor that has the blue light of glow peak in the wavelength region may that is emitted in 430 ~ 470nm by above-mentioned 1 optical excitation, be emitted in the green-emitting phosphor of the green light that has glow peak in the wavelength region may of 520 ~ 560nm by above-mentioned 1 optical excitation and be emitted in the red light of the glow peak that has 2 above wire in the wavelength region may of 580 ~ 740nm by above-mentioned 1 optical excitation; And; Above-mentioned blue emitting phophor is made up of the a kind of fluorophor that is selected from divalent europium activation halophosphate fluorophor, divalent europium-activated aluminate fluorophor, silver-activated zinc sulfide fluorophor and the chlorine activation zinc sulphide fluorophor at least; Above-mentioned green-emitting phosphor is made up of the a kind of fluorophor that is selected from europium and manganese activated alkali earths magnesium orthosilicate fluorophor and the europium activation Sialon phosphor at least; Above-mentioned red-emitting phosphors is selected from the terres rares oxysulfide fluorophor of at least a kind of activation in europium and the samarium, and the above-mentioned liquid crystal indicator that uses above-mentioned White LED to make ought be used L
*u
*v
*During the color reproduction zone of the illuminant colour of (u ', v ') this liquid crystal indicator of value representation of the chromatic diagram of color specification system, the chroma point of the blueness of above-mentioned illuminant colour, green and red each primary colors is respectively at the chroma point with respect to the blueness of ITU-R BT.709, green and red each primary colors ± scope below 0.02 in.
In addition; The backlight of the full-color liquid crystal indicator of execution mode of the present invention is the technical scheme that is used to address the above problem with White LED; It is characterized in that; Possess: light-emitting component, its ejaculation has 1 light of glow peak in the wavelength region may of 360 ~ 430nm, and is at least a kind that is selected from ultraviolet LED, bluish violet light-emitting diode, luminescence-utraviolet laser and the bluish violet emitting laser; And luminescent coating; The red-emitting phosphors that it comprises the green-emitting phosphor that sent green light by above-mentioned 1 optical excitation, sent the blue emitting phophor of blue light by above-mentioned 1 optical excitation and sent red light by above-mentioned 1 optical excitation; And; Above-mentioned green-emitting phosphor constitutes by being selected from fact by the divalent europium of formula 1 expression and manganese activated silicate phosphor and at least a kind of fluorophor being activated in the Sialon phosphor by the europium of formula 2 or 3 expressions in fact; Above-mentioned blue emitting phophor by be selected from fact divalent europium by formula 4 expressions activate the halophosphate fluorophor, in fact by the divalent europium-activated aluminate fluorophor of formula 5 expressions, constitute by the silver-activated zinc sulfide fluorophor of formula 6 expressions and at least a kind of fluorophor activating in the zinc sulphide fluorophor by the chlorine of formula 7 expressions in fact in fact; Above-mentioned red-emitting phosphors is in fact by formula 8 terres rares oxysulfide fluorophor expression, that be selected from least a kind of activation in europium and the samarium; Content about the fluorophor of all kinds in the above-mentioned luminescent coating; Total amount with respect to whole fluorophor; Green-emitting phosphor is 1 ~ 10 weight %, and blue emitting phophor is 40 ~ 80 weight %, and red-emitting phosphors is 10 ~ 50 weight %.
General formula 1: (Sr
2-x-y-z-uBa
xMg
yEu
zMn
u) SiO
4
(in the formula, x, y, z and u are the values that satisfies 0.1＜x＜1.0,0≤y＜0.21,0.05＜z＜0.3,0≤u＜0.04)
General formula 2: (Sr
3-xEu
x) Si
yAl
zO
vN
w
(in the formula, x, y, z, v and w are the numbers that satisfies 0＜x≤3,12＜y＜14,2＜z＜3.5,1＜v＜3,20＜w＜22)
General formula 3: (Si, Al)
6(O, N)
8: Eu
x
(in the formula, x is the number that satisfies 0＜x＜0.3)
General formula 4: (M
2, Eu)
10(PO
4)
6Cl
2
(in the formula, M
2Expression is selected from least a kind of element among Mg, Ca, Sr and the Ba)
General formula 5:a (M
3, Eu) ObAl
2O
3
(in the formula, M
3Expression is selected from least a kind of element among Mg, Ca, Sr, Ba, Zn, Li, Rb and the Cs, and a and b are the numbers that satisfies 0＜a, 0＜b, 0.2≤a/b≤1.5)
General formula 6: (Zn
1-xAg
x) S
(in the formula, x is the number that satisfies 0＜x＜0.01)
General formula 7: (Zn
1-xCl
x) S
(in the formula, x is the number that satisfies 0＜x＜0.01)
General formula 8: (La
1-x-y-zY
xSm
yEu
z)
2O
2S
(in the formula, x, y and z are the values that satisfies 0≤x＜0.99,0≤y＜0.03,0.01＜z＜0.15 and 1-x-y-z>=0)
In addition, the full-color backlight for liquid crystal display of execution mode of the present invention is the technical scheme that is used to address the above problem, and it is characterized in that, has used above-mentioned White LED.
In addition, the full-color liquid crystal indicator of execution mode of the present invention is the technical scheme that is used to address the above problem, and it is characterized in that, it is to use above-mentioned backlight to make.
Description of drawings
Fig. 1 is the profile of an example of the White LED of expression execution mode of the present invention.
Fig. 2 is the figure of an example of the luminescent spectrum of the white light that penetrates of expression White LED 10.
Fig. 3 expression pack into the White LED 10 of execution mode of the present invention make, with the figure of the example in the color reproduction zone of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard.
Embodiment
[White LED]
Fig. 1 is the profile of an example of the White LED of expression execution mode of the present invention.
White LED 10 shown in Figure 1 possesses: substrate 6; Be configured in the lip-deep light-emitting diode 1 of substrate 6 as light-emitting component; With the distribution 5 of substrate 6 with light-emitting diode 1 electrical connection; The resin frame 4 that on the surface of substrate 6, is provided with the mode of surrounding light-emitting diode 1; The reflector 3 of the internal face of covering resin frame 4; With luminescent coating 2, this luminescent coating 2 is divided the recess that forms and is covered light-emitting diode 1 by being embedded with in the resin to be formed and to be filled in by substrate 6 and reflector 3 by the solidfied material of the light activated fluorophor of light-emitting diode 1 ejaculation.
In addition, though White LED 10 shown in Figure 1 possesses substrate 6, reflector 3, also substrate 6, reflector 3 can be set as required in the present invention.
The structure of White LED 10 is: convert ultraviolet light or purple light from substrate 6 to via the utilization of power light-emitting diode 1 that distribution 5 offers light-emitting diode 1; This ultraviolet light or purple light utilize the fluorophor in the luminescent coating 2 and convert the longer light of wavelength to, send outside LED lamp (White LED) 10 as the white light of the total of the light of the longer light of ultraviolet light or purple light and wavelength.
White LED 10 for example possesses the backlight that the is suitable for full-color liquid crystal indicator characteristic with light source.White LED 10 preferably possesses and is suitable for and the backlight of the corresponding full-color liquid crystal indicator of the ITU-R BT.709 standard characteristic with light source.
(light-emitting component)
In the present invention; As light-emitting component 1, use to penetrate 1 light in the wavelength region may of 360 ~ 430nm, having glow peak and be selected from least a kind light-emitting component in ultraviolet LED, bluish violet light-emitting diode, luminescence-utraviolet laser and the bluish violet emitting laser.Here, only refer to for 1 time from the light of light-emitting component ejaculation.In addition, emitting laser is meant semiconductor laser or laser diode.
Shown in Figure 1 for using the ultraviolet LED that penetrates ultraviolet light or penetrating the example of the bluish violet light-emitting diode of purple light as light-emitting component 1.
Light-emitting component 1 is owing to penetrate 1 light that in the wavelength region may of 360 ~ 430nm, has glow peak, therefore when with luminescent coating 2 in the fluorophor combination time, can produce the more White LED of excellence of high brightness and colorrendering quality.
Ultraviolet LED or bluish violet light-emitting diode as penetrating 1 light that in the wavelength region may of 360 ~ 430nm, has glow peak for example can use diodes such as InGaN system, GaN system, AlGaN system.
In addition, White LED 10 shown in Figure 1 is to use the example of light-emitting diode as light-emitting component 1, but also can use luminescence-utraviolet laser or bluish violet emitting laser to replace light-emitting diode.
(luminescent coating)
Luminescent coating 2 comprises: the red-emitting phosphors that is sent the blue emitting phophor of blue light by 1 optical excitation of penetrating from light-emitting component 1 that in the wavelength region may of 360 ~ 430nm, has glow peak, sent the green-emitting phosphor of green light by this 1 optical excitation and sent red light by this 1 optical excitation.
The state of luminescent coating 2 is: the particle that is made up of the monomer of blue emitting phophor, green-emitting phosphor or red-emitting phosphors, or disperseed in a large number with the mode that comprises blue emitting phophor, green-emitting phosphor and red-emitting phosphors and be fixed in the resin cured matter by the particle that granulation forms more than a kind of these fluorophor.
＜green-emitting phosphor＞
As green-emitting phosphor, use the fluorophor that in the wavelength region may of 360 ~ 430nm, is had 1 optical excitation of glow peak and send green light.
In addition, as green-emitting phosphor, preferred use is had 1 optical excitation of glow peak and is emitted in the fluorophor that has the green light of glow peak in the wavelength region may of 520 ~ 560nm in the wavelength region may of 360 ~ 430nm.
As such green-emitting phosphor, for example can enumerate by being selected from europium and manganese activated alkali earths magnesium orthosilicate fluorophor and europium and activate the green-emitting phosphor that at least a kind of fluorophor in the Sialon phosphor constitutes.
More specifically, as green-emitting phosphor, for example can use in fact by the divalent europium of formula 1 expression and manganese activated silicate phosphor and activate Sialon phosphor by the europium of formula 2 or 3 expressions in fact.
In addition, in fact by the fluorophor of general formula 1 ~ 3 expression sometimes the numerical value of the x in the factor, y, z, v, w difference and show as green-emitting phosphor or yellow fluorophor, but be referred to as green-emitting phosphor in this manual.
General formula 1: (Sr
2-x-y-z-uBa
xMg
yEu
zMn
u) SiO
4
(in the formula, x, y, z and u are the values that satisfies 0.1＜x＜1.0,0≤y＜0.21,0.05＜z＜0.3,0≤u＜0.04)
In the above-mentioned general formula 1, if x and u are in the above-mentioned scope, the green light wavelength that is then penetrated by the green-emitting phosphor powder has as the suitable wavelength of green light that constitutes the white light that penetrates from the White LED 1 of execution mode.
In addition, in the general formula 1, if y is in the above-mentioned scope, then the solid solution of Mn is carried out fully and luminous efficiency is improved in the green-emitting phosphor powder, thereby preferred.
And then if z is in the above-mentioned scope in the general formula 1, then the luminous efficiency of green-emitting phosphor powder improves, thereby preferred.
General formula 2: (Sr
3-xEu
x) Si
yAl
zO
vN
w
(in the formula, x, y, z, v and w are the numbers that satisfies 0＜x≤3,12＜y＜14,2＜z＜3.5,1＜v＜3,20＜w＜22)
In the above-mentioned general formula 2, if x, y, z, v and w are in the above-mentioned scope, the green light wavelength that then penetrates from the green-emitting phosphor powder is suitable to the green light of formation from the white light of White LED 1 ejaculation of execution mode.
General formula 3: (Si, Al)
6(O, N)
8: Eu
x
(in the formula, x is the number that satisfies 0＜x＜0.3)
In the above-mentioned general formula 3, if x is in the above-mentioned scope, the green light wavelength that then penetrates from the green-emitting phosphor powder is suitable to the green light of formation from the white light of White LED 1 ejaculation of execution mode.
Green-emitting phosphor can use in fact by a kind of the fluorophor of above-mentioned general formula 1 ~ 3 expression separately or use mixing more than 2 kinds.That is, green-emitting phosphor can constitute by being selected from fact by the divalent europium of above-mentioned general formula 1 expression and manganese activated silicate phosphor and at least a kind of green-emitting phosphor being activated in the Sialon phosphor by the europium of general formula 2 or 3 expressions in fact.
Do not limit the manufacturing approach of green-emitting phosphor is special, for example, can enumerate following method for the fluorophor of general formula 1.At first, press the brium carbonate (BaCO of the composition weighing ormal weight shown in the general formula 1
3), strontium carbonate (SrCO
3), manganese carbonate (MnCO
3), magnesia (MgO), europium oxide (Eu
2O
3) and silicon dioxide (SiO
2), they are carried out powder fully with sintering aid mix.This raw mix is joined in the refractory bodies such as crucible, burning till about 2 ~ 5 hours under 1100 ~ 1300 ℃ the temperature.Afterwards, the thing that burns till that obtains is washed with pure water, remove unwanted solvable composition.Then, behind pulverizing process, carry out filtration drying, can obtain the green-emitting phosphor of target.
In addition, as green-emitting phosphor, also can use green-emitting phosphor that makes by the common manufacturing approach beyond above-mentioned or the commercially available article of forming that satisfy general formula 1 ~ 3.
＜blue emitting phophor＞
As blue emitting phophor, use the fluorophor that in the wavelength region may of 360 ~ 430nm, is had 1 optical excitation of glow peak and send blue light.
In addition, as blue emitting phophor, the preferred use had 1 optical excitation of glow peak and is emitted in the fluorophor that has the blue light of glow peak in the wavelength region may of 430 ~ 470nm in the wavelength region may of 360 ~ 430nm.
As such blue emitting phophor, for example can enumerate by being selected from the divalent europium and activate the blue emitting phophor that at least a kind of fluorophor in halophosphate fluorophor, divalent europium-activated aluminate fluorophor, silver-activated zinc sulfide fluorophor and the chlorine activation zinc sulphide fluorophor constitutes.
More specifically; As blue emitting phophor, for example use in fact divalent europium by formula 4 expressions activate the halophosphate fluorophor, in fact by the divalent europium-activated aluminate fluorophor of formula 5 expressions, in fact by the silver-activated zinc sulfide fluorophor of formula 6 expressions and activate the zinc sulphide fluorophor by the chlorine of general formula 7 expressions in fact.
General formula 4: (M
2, Eu)
10(PO4)
6Cl
2
(in the formula, M
2Expression is selected from least a kind of element among Mg, Ca, Sr and the Ba)
General formula 5:a (M
3, Eu) ObAl
2O
3
(in the formula, M
3Expression is selected from least a kind of element among Mg, Ca, Sr, Ba, Zn, Li, Rb and the Cs, and a and b are the numbers that satisfies 0＜a, 0＜b, 0.2≤a/b≤1.5)
In the above-mentioned general formula 5, if a and b are in the above-mentioned scope, the blue light wavelength that then penetrates from the blue emitting phophor powder is suitable to the blue light of formation from the white light of White LED 1 ejaculation of execution mode.
General formula 6: (Zn
1-xAg
x) S
(in the formula, x is the number that satisfies 0＜x＜0.01)
In the above-mentioned general formula 6, if x is in the above-mentioned scope, the blue light wavelength that then penetrates from the blue emitting phophor powder is suitable to the blue light of formation from the white light of White LED 1 ejaculation of execution mode.
General formula 7: (Zn
1-xCl
x) S
(in the formula, x is the number that satisfies 0＜x＜0.01)
In the above-mentioned general formula 7, if x is in the above-mentioned scope, the blue light wavelength that then penetrates from the blue emitting phophor powder is suitable to the blue light of formation from the white light of White LED 1 ejaculation of execution mode.
Blue emitting phophor can use in fact by a kind of the fluorophor of above-mentioned general formula 4 ~ 7 expressions separately or use mixing more than 2 kinds.That is, blue emitting phophor can by be selected from fact divalent europium by above-mentioned general formula 4 expressions activate the halophosphate fluorophor, in fact by the divalent europium-activated aluminate fluorophor of general formula 5 expressions, constitute by the silver-activated zinc sulfide fluorophor of general formula 6 expressions and at least a kind of blue emitting phophor activating in the zinc sulphide fluorophor by the chlorine of general formula 7 expressions in fact in fact.
Do not limit the manufacturing approach of blue emitting phophor is special, for example, can enumerate following method for the fluorophor of general formula 4.At first, press the europium oxide (Eu of the composition weighing ormal weight shown in the general formula 4
2O
3), strontium chloride (SrCl
2), brium carbonate (BaCO
3), calcium carbonate (CaCO
3) and strontium monophosphate (SrHPO
4), they are carried out powder fully with sintering aid mix.This raw mix is joined in the refractory bodies such as crucible, burning till about 2 ~ 5 hours under 1000～1400 ℃ the temperature.Afterwards, the thing that burns till that obtains is washed with pure water, remove unwanted solvable composition.Then, behind pulverizing process, carry out filtration drying, can obtain the blue emitting phophor of target.
In addition, as blue emitting phophor, also can use blue emitting phophor that makes by the common manufacturing approach beyond above-mentioned or the commercially available article of forming that satisfy general formula 4 ~ 7.
＜red-emitting phosphors＞
As red-emitting phosphors, use the fluorophor that in the wavelength region may of 360 ~ 430nm, is had 1 optical excitation of glow peak and send red light.
In addition, as red-emitting phosphors, the preferred fluorophor that in the wavelength region may of 360 ~ 430nm, is had 1 optical excitation of glow peak and be emitted in the red light of the glow peak that has 2 above wire in the wavelength region may of 580 ~ 740nm that uses.
As such red-emitting phosphors, for example can enumerate the terres rares oxysulfide fluorophor of at least a kind of activation that is selected from europium and the samarium.
More specifically, as red-emitting phosphors, for example use in fact by formula 8 terres rares oxysulfide fluorophor expression, that be selected from least a kind of activation in europium and the samarium.
General formula 8: (La
1-x-y-zY
xSm
yEu
z)
2O
2S
(in the formula, x, y and z are the values that satisfies 0≤x＜0.99,0≤y＜0.03,0.01＜z＜0.15 and 1-x-y-z>=0)
In the above-mentioned general formula 8, if x, y and z are in the above-mentioned scope, the red light wavelength that then penetrates from the red-emitting phosphors powder is suitable to the red light of formation from the white light of White LED 1 ejaculation of execution mode.
Do not limit the manufacturing approach of red-emitting phosphors is special, for example can enumerate following method.At first, press the europium oxide (Eu of the composition weighing ormal weight shown in the general formula 8
2O
3), samarium oxide (Sm
2O
3), yittrium oxide (Y
2O
3) and sulphur powder (S), they are carried out powder fully with sintering aid mix.This raw mix is joined in the refractory bodies such as crucible, burning till about 2 ~ 5 hours under 1000 ~ 1300 ℃ the temperature.Afterwards, burn till thing with pure water and acid elution, remove unwanted solvable composition what obtain.Then, behind pulverizing process, carry out filtration drying, can obtain the red-emitting phosphors of target.
In addition, as red-emitting phosphors, also can use red-emitting phosphors that makes by the common manufacturing approach beyond above-mentioned or the commercially available article of forming that satisfy general formula 8.
Above-mentioned green-emitting phosphor, blue emitting phophor and red-emitting phosphors are generally Powdered.
In addition, if above-mentioned green-emitting phosphor, blue emitting phophor and red-emitting phosphors use respectively more than a kind, then color rendering improves, thereby preferred.For example, if green-emitting phosphor, preferably with using by the fluorophor combination of general formula 1 ~ 3 expression in fact more than 2 kinds.
In addition; If the particle that constitutes by the monomer of blue emitting phophor, green-emitting phosphor or red-emitting phosphors in the luminescent coating 2, or big by the average grain diameter of the particle that granulation forms more than a kind of these fluorophor; The brightness of the light that then penetrates from luminescent coating 2 improves, thereby preferred.
Particularly, the average grain diameter of fluorophor is generally more than the 1 μ m, is preferably more than the 10 μ m.Here, average grain diameter is meant the D50 of the particle diameter of expression weight aggregate-value 50%.
In addition, the higher limit of average grain diameter D50 is not special to be limited, and is preferably below 90% of thickness of the luminescent coating 2 of White LED.If the thickness than luminescent coating 2 is big, then when using resin that fluorophor particle is solidified to form luminescent coating 2, be easy to generate unfavorable conditions such as fluorophor particle threshing.
As the method that the average grain diameter that makes fluorophor increases, the fluorophor powder that can enumerate the of the same race or xenogenesis that uses a kind of color carries out process for granulating, the fluorophor powder of the of the same race or xenogenesis of 3 kinds of colors is mixed carry out process for granulating etc.In addition, as other method, can enumerate when fluorophor powder is burnt till the method using adjuvant for combustion or at high temperature burn till the fluorophor powder itself that increases when burning till for a long time etc.
In addition, about the selection of the fluorophor of each general formula, preferably select according to excitation wavelength, brightness requirement, corrosion resistance, cost etc.
In the present invention; In luminescent coating 2 except containing above-mentioned blue emitting phophor, green-emitting phosphor and the red-emitting phosphors, can also further containing other fluorophor such as blue emitting phophor, green-emitting phosphor and red-emitting phosphors or yellow fluorophor etc. except that above-mentioned.
＜resin cured matter＞
As resin cured matter, use the solidfied material of normally used resin in White LED is made.The optical index that resin cured matter is preferably water white solidfied material and has regulation.
Particularly, the transmissivity of resin cured matter is generally 98 ~ 100%, is preferably 99 ~ 100%.Here, transmissivity is meant with the test film of 2mm thickness and measures the monochromatic light of 400nm and the value that obtains.
In addition, the optical index of resin cured matter is generally 1.3 ~ 1.7, is preferably 1.4 ~ 1.6.
In addition,, then understand variation from the light extraction of light-emitting diode sometimes if optical index is lower than 1.3, thus not preferred.If optical index surpasses 1.7, then exist with the ultraviolet ray that is used for phosphor excitation to react and rotten tendency, thereby not preferred.
And then resin cured matter preferred transmission rate and optical index all are in the solidfied material in the above-mentioned scope.
As having the resin cured matter of characteristic as stated, for example can enumerate the solidfied material of resins such as silicone resin, epoxy resin.Wherein, the resin cured matter of silicone resin is difficult for causing variable color under ultraviolet ray and has a durability, thereby preferred.
Though different because of the kind of resin, above-mentioned resin cured matter can have mobile resin or in having mobile resin, suitably add curing agent and waits and obtain through placement.
The use level of＜fluorophor＞
Luminescent coating 2 for example can obtain resin solidification after above-mentioned green-emitting phosphor, blue emitting phophor and red-emitting phosphors are added in having mobile resin, mix.
Above-mentioned green-emitting phosphor, blue emitting phophor and red-emitting phosphors in the luminescent coating 2 absorbs this ultraviolet ray or blue-violet light efficiently and carries out the luminous of color separately expeditiously when receiving the irradiation of ultraviolet ray that wavelength from light-emitting components such as ultraviolet LED 1 is 360 ~ 430nm or blue-violet light respectively.
That is, when receiving the irradiation of ultraviolet ray or blue-violet light, above-mentioned green-emitting phosphor penetrates the green light of high brightness, and above-mentioned blue emitting phophor penetrates the blue light of high brightness, and above-mentioned red-emitting phosphors penetrates the red light of high brightness.Consequently, green light, blue light and red light are added white light that the mixture of colours obtains, that penetrate from White LED 10 and also become high brightness.
In addition, when obtaining white light,, then not preferred if the luminance difference of each coloured light of green light, blue light and red light is excessive through White LED 10.For example, when green light only is high brightness and the brightness of blue light and red light when low, the white light that penetrates from White LED 10 becomes green partially white, thereby not preferred.
Like this, in order to obtain the white light of high brightness at White LED 10, each coloured light of green light (G), blue light (B) and red light (R) need be high brightness.Therefore, in White LED 10, except that using above-mentioned specific fluorophor, the cooperation ratio of this fluorophor is also very important.
The cooperation ratio of above-mentioned green-emitting phosphor, blue emitting phophor and red-emitting phosphors is suitably set so that White LED 10 has the mode of the light characteristic of the colour gamut that can meet ITU-R BT.709 standard.
Particularly, about the content of fluorophor of all kinds, with respect to the total amount of whole fluorophor, above-mentioned green-emitting phosphor is 1 ~ 10 weight % usually, and above-mentioned blue emitting phophor is 40 ~ 80 weight %, and above-mentioned red-emitting phosphors is 10 ~ 50 weight %.
In addition, the content of fluorophor of all kinds is preferred: with respect to the total amount of whole fluorophor, above-mentioned green-emitting phosphor is that 2 ~ 9 weight %, above-mentioned blue emitting phophor are that 45 ~ 65 weight % and above-mentioned red-emitting phosphors are 26 ~ 48 weight %.
If the discontented sufficient above-mentioned relation of the cooperation ratio of each fluorophor in the luminescent coating 2; Then White LED 10, the full-color liquid crystal indicator that the backlight of this White LED 10 is housed and uses this backlight to make can't be realized required white point; That is the light characteristic that, might not possess the colour gamut that can meet ITU-R BT.709 standard.
Luminescent coating 2 for example can be made through the fluorophor-resin compound that in resin, cooperates green-emitting phosphor, blue emitting phophor and red-emitting phosphors to obtain is solidified.
As the manufacture method of fluorophor-resin compound, can enumerate with fluorophor powder of all kinds respectively with mixed with resin after, the resin that contains fluorophor powder of all kinds that will obtain is mixed with each other and makes the method for fluorophor-resin compound; Or the method that in advance fluorophor powder of all kinds is mixed with each other the back, the mixture and the mixed with resin of this fluorophor powder are made fluorophor-resin compound.
Here, the content of the fluorophor powder in fluorophor-resin compound is generally 30 ~ 80 weight %, is preferably 40 ~ 70 weight %.
If the content of the fluorophor powder in fluorophor-resin compound is lower than 30 weight %; The situation of luminescent coating 2 then appears not seen through by the absorption of the fluorophor of luminescent coating 2 from the direct sunshine that light-emitting diode 1 penetrates easily; And the viscosity of slurry reduces, fluorophor particle sedimentation in resin easily, makes the irregular colour of the light that penetrates from luminescent coating 2 become big thus easily.
On the other hand, if the content of the fluorophor powder in fluorophor-resin compound surpasses 80 weight %, the viscosity increased of slurry then, thereby make the operation of the slurry difficulty that becomes easily.
In addition; The luminescent coating 2 that obtains though make the resin solidification of fluorophor-resin compound also depends on the kind of resin; But reduce and not have in fact or seldom owing to be accompanied by the weight of the resin of curing, so the content of the fluorophor powder in the content of the fluorophor powder in fluorophor-resin compound and the luminescent coating 2 about equally.
(luminescent spectrum of the white light of White LED)
White LED 10 possesses the light-emitting component 1 and luminescent coating 2 of above-mentioned formation; Therefore the full-color liquid crystal indicator that makes up for backlight that this White LED 10 will be housed and colour filter and obtain; This liquid crystal indicator penetrates the light of the light characteristic of the colour gamut that can meet ITU-R BT.709 standard, and White LED 10 also can penetrate the light of the light characteristic of the colour gamut that can meet ITU-R BT.709 standard separately.
But usually, see through light colour filter, that penetrate from full-color liquid crystal indicator and compare, can form the light of the light characteristic of the colour gamut that more can meet ITU-R BT.709 standard with the light that penetrates from White LED 10 separately.
The luminescent spectrum of the white light that White LED 10 penetrates has following the 1st glow peak group, the 2nd glow peak group, the 3rd glow peak group and paddy portion usually.
Wherein, the 1st glow peak group, the 2nd glow peak group and the 3rd glow peak group represent to be present in the glow peak group in the wavelength region may at place, transmissivity peak of blueness, green, red liquid crystal colour filter of all kinds.
Particularly; In the luminescent spectrum of the white light that White LED 10 penetrates; The 1st glow peak group is the interior glow peak group of wavelength region may that is present in the place, transmissivity peak of blue color filter; The 2nd glow peak group is the interior glow peak group of wavelength region may that is present in the place, transmissivity peak of green color filter, and the 3rd glow peak group is the interior glow peak group of wavelength region may that is present in the place, transmissivity peak of red color filter.
＜the 1 glow peak group＞
The 1st glow peak group is the glow peak group that in the luminescent spectrum of the white light that White LED 10 penetrates, has at least 1 glow peak in the wavelength region may at 430 ~ 470nm.
In addition, if the 1st glow peak group has glow peak in the wavelength region may of 430 ~ 460nm, then blue brightness improves, thereby preferred.
And then if the 1st glow peak group only has 1 glow peak in the wavelength region may of 430 ~ 460nm, then blue brightness improves, thereby more preferably.
＜the 2 glow peak group＞
The 2nd glow peak group is the glow peak group that in the luminescent spectrum of the white light that White LED 10 penetrates, has at least 1 glow peak in the wavelength region may at 520 ~ 560nm.
In addition, if the 2nd glow peak group has glow peak in the wavelength region may of 520 ~ 555nm, then green brightness improves, thereby preferred.
And then if the 2nd glow peak group only has 1 glow peak in the wavelength region may of 520 ~ 555nm, then green brightness improves, thereby more preferably.
In addition, the full width at half maximum (FWHM) of the glow peak of the 2nd glow peak group is preferably more than the 50nm and below the 200nm.
＜the 3 glow peak group＞
The 3rd glow peak group is in the luminescent spectrum of the white light that White LED 10 penetrates, to have at least 2 glow peak groups for the glow peak of wire at least 2 glow peaks and this glow peak in the wavelength region may at 580 ~ 740nm.
In addition, in this manual, the glow peak of wire is meant that full width at half maximum (FWHM) is the glow peak below the 5nm.
In addition, if the maximum glow peak of luminous intensity is in the wavelength region may of 590 ~ 710nm in the glow peak of the wire of the 3rd glow peak group, then red brightness improves, thereby preferred.
And then, if the 3rd glow peak group has the glow peak of at least 1 wire and the glow peak that has at least 1 wire in the wavelength region may of 700 ~ 710nm in the wavelength region may of 620 ~ 630nm, then can show dark red, thereby preferred.
＜paddy portion＞
Paddy portion is the point that in the luminescent spectrum of the white light that White LED 10 penetrates, shows the luminous intensity minimum in the wavelength region may that surpasses 470nm and be lower than 520nm.Paddy portion is present in the wavelength region may of 480 ~ 500nm.
If each glow peak group appears in the above-mentioned wavelength region may in the luminescent spectrum of the white light that White LED 10 penetrates, then White LED 10, the backlight of this White LED 10 is housed and uses the colour gamut that full-color liquid crystal indicator that this backlight makes can corresponding ITU-R BT.709 standard.
The luminous intensity of the luminescent spectrum of the white light of＜White LED＞
The luminescent spectrum of the white light that penetrates about White LED 10; When the maximum P1 of the luminous intensity of the glow peak in the 1st glow peak group that occurs in the wavelength region may of 430 ~ 470nm is made as 1.0; The maximum P2 of the luminous intensity of the glow peak in the 2nd glow peak group that occurs in the wavelength region may of 520 ~ 560nm is generally 0.1≤P2≤1.0, is preferably 0.2≤P2≤0.9.
The luminescent spectrum of the white light that penetrates about White LED 10; When the maximum P1 of the luminous intensity of the glow peak in the 1st glow peak group that occurs in the wavelength region may of 430 ~ 470nm is made as 1.0; The maximum P3 of the luminous intensity of the glow peak in the 3rd glow peak group that occurs in the wavelength region may of 580 ~ 740nm is generally 0.2≤P3≤3.0, is preferably 0.3≤P3≤2.9.
The luminescent spectrum of the white light that penetrates about White LED 10; When the maximum P1 of the luminous intensity of the glow peak in the 1st glow peak group that occurs in the wavelength region may of 430 ~ 470nm is made as 1.0; The minimum V1 of the luminous intensity of the paddy portion that exists in the wavelength region may of 480 ~ 500nm is generally 0.01≤V1≤0.6, is preferably 0.01≤V1≤0.4.
The luminescent spectrum of the white light that penetrates about White LED 10; When the maximum P1 of the luminous intensity of the glow peak in the 1st glow peak group that occurs in the wavelength region may of 430 ~ 470nm is made as 1.0; The luminous intensity P600 at 600nm place is generally below 50% of P3; Be preferably below 30% of P3, more preferably 1 ~ 30% of P3.
If the minimum V1 of maximum intensity P1, P2 and the P3 of each glow peak group of White LED 10, the luminous intensity of paddy portion and the luminous intensity P600 at 600nm place do not satisfy above-mentioned relation; Then use the colour mixture of the colour filter transmitted light of the full-color liquid crystal indicator that backlight that White LED 10 is housed makes can become greatly, colour purity reduces easily.
For example, when V1 surpasses above-mentioned scope, when promptly surpassing 0.6, in the colour filter transmitted light of blueness, sneaks into the green composition of green light easily, and in the colour filter transmitted light of green, sneak into the blue composition of blue light easily.
In addition, V1 is more little, the green composition of green light in the colour filter transmitted light of blueness sneak into and blue composition the sneaking into more in the colour filter transmitted light of green of blue light is suppressed, thereby preferred, but be difficult to be lower than 0.01 in fact.Therefore, the lower limit with V1 is defined as 0.01.
In addition, when P600 surpass above-mentioned scope, promptly surpass P3 50% the time, in the colour filter transmitted light of redness, sneak into the green or yellow composition of green light easily and colour purity reduced.
Fig. 2 is the figure of an example of the luminescent spectrum of the white light that penetrates of expression White LED 10.Here, White LED 10 shown in Figure 2 is White LEDs of making among the following embodiment 1.In addition, in Fig. 2, also show the luminescent spectrum that the representative CRT that meets the EBU standard is the white show state of the system RDS-15X of Mitsubishi Electric Corporation in the lump.
As shown in Figure 2, the luminescent spectrum of the white light of the White LED 10 of embodiment 1 has the 1st glow peak group, the 2nd glow peak group, the 3rd glow peak group and paddy portion.
In Fig. 2, the 1st glow peak group is made up of 1 glow peak, and this spike length is 452nm.
In Fig. 2, the 2nd glow peak group is made up of 1 glow peak, and this spike length is 534nm.
In Fig. 2, the glow peak that the 3rd glow peak group has 4 main wire, this spike length is respectively 595nm, 616nm, 625nm, 704nm.
In addition, can know that the relation of the intensity that presents wavelength and each glow peak of glow peak is identical with the luminescent spectrum of the white show state of the representative CRT that meets the EBU standard in the luminescent spectrum of the white light of the White LED 10 of embodiment 1 by Fig. 2.That is, the luminescent spectrum of the white light of the White LED 10 of embodiment 1 is with identical for guaranteeing the required luminescent spectrum of the colorrendering quality of EBU standard.
(colour gamut of the illuminant colour of the full-color liquid crystal indicator that the use White LED makes)
Through with White LED 10 as light source, with combinations such as this White LED 10 and LGPs, can make backlight.In addition; Through blueness, green and the red common colour filter combinations such as colour filter that this backlight and full-color liquid crystal indicator are used; Promptly through the White LED 10 of packing into, can make and penetrate the full-color liquid crystal indicator that has with the light in the corresponding color reproduction of ITU-R BT.709 standard zone.Below, the full-color liquid crystal indicator that ejaculation is had with the light in the corresponding color reproduction of ITU-R BT.709 standard zone abbreviates as and the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard.
About this and the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard, as L with CIE
*u
*v
*During the color reproduction zone of the illuminant colour of (u ', v ') this liquid crystal indicator of value representation on the u ' v ' coordinate of color specification system chromatic diagram, the chroma point of the blueness of above-mentioned illuminant colour, green and red each primary colors is respectively at the chroma point with respect to the blueness of ITU-R BT.709, green and red each primary colors ± scope below 0.02 in.
Fig. 3 pack into the White LED 10 of execution mode of the present invention make, with the figure of the example in the color reproduction zone of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard.Fig. 3 is with the L of CIE
*u
*v
*(u ', v ') value of color specification system chromatic diagram is represented.In addition, shown in Figure 3ly use the White LED that makes among the following embodiment 1 as White LED 10 with the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard.In addition, in Fig. 3, also show the colour gamut of ITU-R BT.709 and the colour gamut of NTSC in the lump.
As shown in Figure 3, the White LED 10 of the embodiment 1 that packs into makes, the color reproduction zone with the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard, the colour gamut of ITU-R BT.709 and the colour gamut of NTSC are in the scope that triangle was surrounded on summit at the chroma point BGR with each blue, green and red primary colors respectively.
In addition, can know by Fig. 3, the White LED 10 of the embodiment 1 that packs into makes, with the colour gamut of the color reproduction zone of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard and ITU-R BT.709 be roughly the same scope.
In addition; White LED 10 about the execution mode of the present invention of packing into makes, with the color reproduction zone of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard; Even under the situation of the White LED of the present invention 10 beyond the embodiment 1 of packing into; Also same with the situation of the White LED 10 of the embodiment 1 that packs into, be in the scope that triangle was surrounded on summit at chroma point BGR with each blue, green and red primary colors.
The White LED 10 of execution mode of the present invention of packing into makes, with the white colourity of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard can be according to the characteristic of employed colour filter and slightly different, but with the L of CIE
*u
*v
*(u ', v ') value meter of color specification system chromatic diagram is generally in the scope of 0.15≤u '≤0.31,0.36≤v '≤0.49.
In addition, pack into the White LED 10 of execution mode of the present invention make, with the chroma point of the blueness of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard L with CIE
*u
*v
*(u ', v ') value meter of color specification system chromatic diagram is generally in the scope of 0.15≤u '≤0.19,0.14≤v '≤0.18.
The White LED 10 of this execution mode of the present invention of packing into makes, be respectively in u ' value and v ' value with respect to the chroma point of the blueness of ITU-R BT.709 with the u ' value of the chroma point of the blueness of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard and v ' value ± scope below 0.02 in.
In addition, pack into the White LED 10 of execution mode of the present invention make, with the chroma point of the green of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard L with CIE
*u
*v
*(u ', v ') value meter of color specification system chromatic diagram is generally in the scope of 0.10≤u '≤0.14,0.54≤v '≤0.58.
The White LED 10 of this execution mode of the present invention of packing into makes, be respectively in u ' value and v ' value with respect to the chroma point of the green of ITU-R BT.709 with the u ' value of the chroma point of the green of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard and v ' value ± scope below 0.02 in.
In addition, pack into the White LED 10 of execution mode of the present invention make, with the chroma point of the redness of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard L with CIE
*u
*v
*(u ', v ') value meter of color specification system chromatic diagram is generally in the scope of 0.43≤u '≤0.47,0.51≤v '≤0.55.
The White LED 10 of this execution mode of the present invention of packing into makes, be respectively in u ' value and v ' value with respect to the chroma point of the redness of ITU-R BT.709 with the u ' value of the chroma point of the redness of the illuminant colour of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard and v ' value ± scope below 0.02 in.Therefore, pack into the White LED 10 of execution mode of the present invention make, with the color reproduction zone of the corresponding full-color liquid crystal indicator of ITU-RBT.709 standard for the roughly the same scope in color reproduction zone according to the ITU-RBT.709 standard code.
(effect of White LED)
According to as the White LED shown in the execution mode 10; Because white light is that high brightness and glow peak are present in suitable position with suitable size; Therefore the blueness through using with liquid crystal indicator, green, red common colour filter combinations such as colour filter can be made the full-color liquid crystal indicator of realizing with according to the colorrendering quality in the colour gamut of the roughly the same position of the colour gamut of ITU-R BT.709 standard code, size.
Therefore, according to White LED 10, the full-color liquid crystal indicator that is made by the backlight that has used White LED 10 has the high image quality with the CRT monitor peer-level.
[backlight]
Backlight has been to use the full-color backlight for liquid crystal display of above-mentioned White LED 10.Backlight can through use White LED 10 as white light source, and suitably use LGP to wait and make.
In addition, backlight can use a plurality of White LEDs to make in 1 backlight as required.
And then because White LED is a high brightness, therefore, backlight can also be processed the arbitrary type in side light type backlight source, the direct-lighting backlight.
(effect of backlight)
According to the backlight that has used as the White LED shown in the execution mode 10; White LED 10 as white light source is that high brightness and glow peak are present in suitable position with suitable size owing to white light; Therefore the blueness through using with liquid crystal indicator, green, red common colour filter combinations such as colour filter, can make realize with according to the colorrendering quality in the colour gamut of the roughly the same position of the colour gamut of ITU-R BT.709 standard code, size, with the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard.
[full-color liquid crystal indicator]
The device that full-color liquid crystal indicator is to use above-mentioned backlight to make.Particularly, full-color liquid crystal indicator is the device that makes through blueness, green and the red common colour filter combinations such as colour filter that above-mentioned backlight, liquid crystal indicator are used.Full-color liquid crystal indicator is through making up and make with blueness, green, the red common colour filters such as colour filter that White LED 10 is used as the backlight and the liquid crystal indicator of white light source.
The color-filter layer of the common colour filters such as colour filter of the blueness that the formation liquid crystal indicator is used, green, redness is formed by organic pigment, inorganic pigment etc. usually.
As the organic pigment that in color-filter layer, uses, for example can enumerate azo pigment, metal phthalocyanine series pigments, metal complex series pigments etc.
As the inorganic pigment that in color-filter layer, uses, for example can enumerate red inorganic pigments such as iron oxide red, chrome vermillion; Inorganic green pigments such as Yellow organic dyes such as titan yellow, cobalt titanate green, cobalt green; Blue inorganic pigment such as ultramarine, cobalt blue; Purple inorganic pigments such as cobalt violet etc.
Blueness through will being used by the liquid crystal indicator that these pigment forms, green, red common colour filters and White LED 10 combination uses such as colour filter, liquid crystal indicator can realize meeting the colorrendering quality of ITU-R BT.709 standard.
(effect of full-color liquid crystal indicator)
According to the full-color liquid crystal indicator that has used above-mentioned backlight; As the White LED 10 of the white light source of backlight because white light is that high brightness and glow peak are present in suitable position with suitable size; Therefore the blueness through using with liquid crystal indicator, green, red common colour filter combinations such as colour filter, can realize with according to the colorrendering quality in the colour gamut of the roughly the same position of the colour gamut of ITU-R BT.709 standard code, size.
In addition, according to this full-color liquid crystal indicator, because can be, therefore can replace playing the CRT monitor that usefulness, video production uses etc. and use with corresponding according to the colour gamut of ITU-R BT.709 standard code.
In addition, used the backlight of White LED of the present invention and can come to set arbitrarily according to various uses and purpose with other formation of the corresponding full-color liquid crystal indicator of ITU-R BT.709 standard.
Embodiment
Embodiment below is shown, but the invention is not restricted to these embodiment.
(embodiment 1 ~ 9)
In order to estimate White LED, make the White LED of section shown in the structure of Fig. 1.At first, use size be the square ultraviolet LED of 300 μ m as light-emitting component 1, this ultraviolet LED 1 is configured on the surface of substrate 6.Then; Blue emitting phophor powder, the average grain diameter of preparing average grain diameter and be 5 μ m is that green-emitting phosphor powder and the average grain diameter of 5 μ m is the red-emitting phosphors powder of 5 μ m; The total of these fluorophor powders is measured 70 weight portions and the mixing of silicone resin 30 weight portions, obtain slurry.Here, the average grain diameter of fluorophor powder is that the particle diameter of weight aggregate-value 50% is D50.And then, this slurry is added drop-wise on the ultraviolet LED 1, under 100 ~ 150 ℃, heat-treat, thereby silicone resin is solidified, form the White LED of each embodiment.In addition, used silicone resin is that the optical index after solidifying is 1.4 silicone resin.
Table 1 is depicted as kind and the use level (weight %) of the fluorophor of all kinds when being 100 weight % with the fluorophor total amount of excitation wavelength, blue emitting phophor powder, green-emitting phosphor powder and the red-emitting phosphors powder of the ultraviolet LED that in the manufacturing of the White LED of above-mentioned each embodiment, uses.
(comparative example 1 ~ 3)
Make consisting of outside the scope of the present invention shown in the table 1 of fluorophor of all kinds, make the White LED same in addition, its White LED as comparative example 1,2 with embodiment 1.
In addition,, use blue LED, with the above-mentioned White LED of likewise making with the luminescent coating that only contains the green-emitting phosphor shown in the table 1 as light-emitting component 1 as comparative example 3.
＜estimate＞
Measure the luminescent spectrum of the White LED of each embodiment and comparative example.About the wavelength of the glow peak that occurs and the strength ratio of each glow peak, the result is shown in table 2.In addition, about the wire peak, behind the nm of unit of wavelength, add (l) to show difference.In addition, P1, P2, P3, V1, the P in the glow peak intensity
600Be respectively the intensity shown in following.
P1: the maximum intensity of the 1st glow peak group (scope of 430 ~ 470nm)
P2: the maximum intensity of the 2nd glow peak group (scope of 520 ~ 560nm)
P3: the maximum intensity of the 3rd glow peak group (scope of 580 ~ 740nm)
V1: the minimum intensity of (scope of 480 ~ 500nm) between the paddy between the 1st glow peak group and the 2nd glow peak group
P
600: the intensity at wavelength 600nm place
In addition, P
600/ P3 representes the percentage (%) of 600nm intensity with respect to the maximum intensity P3 of the 3rd glow peak group.
Can know that in the White LED of embodiment the luminescent spectrum of the glow peak of luminescent spectrum and CRT shown in Figure 2 is roughly the same.Relative therewith, in the White LED of comparative example, because the use level of fluorophor is not adjusted in the scope of the present invention; Therefore in comparative example 1; Because the maximum intensity of the 1st glow peak group is big, thereby the P3/P1 ratio is less than lower limit, in comparative example 2; Because it is the wavelength of the 2nd glow peak shortens, consequently big with departing from of the luminescent spectrum of CRT.In addition, in comparative example 3, owing to there is not the 3rd glow peak group, thereby the index relevant with P3 can't define, and do not belong to scope of the present invention.
(embodiment 7 ~ 11, comparative example 4 ~ 6)
Normally used colour filter combination in White LED through using embodiment 1 and 3 ~ 9, comparative example 1 ~ 3 and the industry purposes, thereby the corresponding full-color liquid crystal indicator of colour gamut of making and ITU-R BT.709 standard.
Make under the luminous state of White LED, the light through above-mentioned colour filter is being imported in the integrating sphere, estimating the illuminant colour of red (R), green (G), blue (B), analyzing the color reproduction zone (colorrendering quality) of processing behind the full-color liquid crystal indicator (display).About colorrendering quality, use XYZ chromaticity diagram shown in Figure 3 to measure the coordinate of the luminous point of green, blueness, redness.And then try to achieve white colourity.In addition, as comparative example 7, also analyzed from CRT (Mitsubishi Electric Corporation's system, the luminous coordinate of all kinds of the light that RDS-15X) sends that GBR is all shown.Its result is shown in table 3.
As shown in table 3, but the same colorrendering quality that meets ITU-R BT.709 standard when the full-color liquid crystal indicator of knowledge capital embodiment has with the CRT that uses in the past.And in comparative example, at least a kind of color deviation of green colourity, chroma blue, red color the colourity when using CRT in the past, have the colorrendering quality that meets ITU-R BT.709 standard hardly.
Though several embodiments of the present invention is illustrated, these execution modes illustrate as an example, the intention of unqualified invention scope.These novel execution modes can be implemented under other various modes, can in the scope that does not break away from inventive concept, carry out various omissions, displacement, change.These execution modes and distortion thereof are included in scope of invention and the purport, and are included in the invention put down in writing in claims and the impartial scope thereof.
Symbol description
1 light-emitting diode (light-emitting component)
2 luminescent coatings
3 reflector
4 resin frame
5 distributions
6 substrates
10 White LEDs
Claims (8)
1. the backlight of a full-color liquid crystal indicator is used White LED, it is characterized in that, possesses:
Light-emitting component, its ejaculation has 1 light of glow peak in the wavelength region may of 360 ~ 430nm, and is at least a kind that is selected from ultraviolet LED, bluish violet light-emitting diode, luminescence-utraviolet laser and the bluish violet emitting laser; With
Luminescent coating; The red-emitting phosphors that it comprises the blue emitting phophor that has the blue light of glow peak in the wavelength region may that is emitted in 430 ~ 470nm by said 1 optical excitation, be emitted in the green-emitting phosphor of the green light that has glow peak in the wavelength region may of 520 ~ 560nm by said 1 optical excitation and be emitted in the red light of the glow peak that has 2 above wire in the wavelength region may of 580 ~ 740nm by said 1 optical excitation
And said blue emitting phophor is made up of the a kind of fluorophor that is selected from divalent europium activation halophosphate fluorophor, divalent europium-activated aluminate fluorophor, silver-activated zinc sulfide fluorophor and the chlorine activation zinc sulphide fluorophor at least,
Said green-emitting phosphor is made up of the a kind of fluorophor that is selected from europium and manganese activated alkali earths magnesium orthosilicate fluorophor and the europium activation Sialon phosphor at least,
Said red-emitting phosphors is selected from the terres rares oxysulfide fluorophor of at least a kind of activation in europium and the samarium,
The said liquid crystal indicator that uses said White LED to make ought be used L
*u
*v
*During the color reproduction zone of the illuminant colour of (u ', v ') this liquid crystal indicator of value representation of the chromatic diagram of color specification system, the chroma point of the blueness of said illuminant colour, green and red each primary colors is respectively at the chroma point with respect to the blueness of ITU-R BT.709, green and red each primary colors ± scope below 0.02 in.
2. the backlight of full-color liquid crystal indicator according to claim 1 is used White LED, it is characterized in that, the luminescent spectrum of the white light that said White LED penetrates comprises:
In the wavelength region may of 430 ~ 470nm, have at least 1 glow peak the 1st glow peak group,
In the wavelength region may of 520 ~ 560nm, have at least 1 glow peak the 2nd glow peak group,
In the wavelength region may of 580 ~ 740nm, have at least 2 glow peaks and the said glow peak at least 2 for the 3rd glow peak group of the glow peak of wire and
In the wavelength region may of 480 ~ 500nm, be presented at above 470nm and be lower than the paddy portion of the minimum of the luminous intensity in the wavelength region may of 520nm,
The maximum P1 of the luminous intensity of the glow peak in said the 1st glow peak group was made as 1.0 o'clock; The maximum P2 of the luminous intensity of the glow peak in the 2nd glow peak group is 0.1≤P2≤1.0; The maximum P3 of the luminous intensity of the glow peak in the 3rd glow peak group is 0.2≤P3≤3.0; The minimum V1 of the luminous intensity of said paddy portion is 0.01≤V1≤0.6, and the luminous intensity P600 at 600nm place is below 50% of said P3.
3. the backlight of full-color liquid crystal indicator according to claim 1 and 2 is used White LED; It is characterized in that; Said green-emitting phosphor constitutes by being selected from fact by the divalent europium of formula 1 expression and manganese activated silicate phosphor and at least a kind of green-emitting phosphor being activated in the Sialon phosphor by the europium of formula 2 or 3 expressions in fact
General formula 1: (Sr
2-x-y-z-uBa
xMg
yEu
zMn
u) SiO
4
In the formula, x, y, z and u are the values that satisfies 0.1＜x＜1.0,0≤y＜0.21,0.05＜z＜0.3,0≤u＜0.04,
General formula 2: (Sr
3-xEu
x) Si
yAl
zO
vN
w
In the formula, x, y, z, v and w are the numbers that satisfies 0＜x≤3,12＜y＜14,2＜z＜3.5,1＜v＜3,20＜w＜22,
General formula 3: (Si, Al)
6(O, N)
8: Eu
x
In the formula, x is the number that satisfies 0＜x＜0.3.
4. use White LED according to the backlight of each described full-color liquid crystal indicator in the claim 1 ~ 3; It is characterized in that; Said blue emitting phophor activates the halophosphate fluorophor by being selected from the divalent europium of being represented by formula 4 in fact; The divalent europium-activated aluminate fluorophor of representing by formula 5 in fact; The silver-activated zinc sulfide fluorophor of representing by formula 6 in fact; And constitute by at least a kind of blue emitting phophor in the chlorine activation zinc sulphide fluorophor of formula 7 expressions in fact
General formula 4: (M
2, Eu)
10(PO
4)
6Cl
2
In the formula, M
2Expression is selected from least a kind of element among Mg, Ca, Sr and the Ba,
General formula 5:a (M
3, Eu) ObAl
2O
3
In the formula, M
3Expression is selected from least a kind of element among Mg, Ca, Sr, Ba, Zn, Li, Rb and the Cs, and a and b are the numbers that satisfies 0＜a, 0＜b, 0.2≤a/b≤1.5,
General formula 6: (Zn
1-xAg
x) S
In the formula, x is the number that satisfies 0＜x＜0.01,
General formula 7: (Zn
1-xCl
x) S
In the formula, x is the number that satisfies 0＜x＜0.01.
5. use White LED according to the backlight of each described full-color liquid crystal indicator in the claim 1 ~ 4; It is characterized in that; Said red-emitting phosphors is in fact by formula 8 terres rares oxysulfide fluorophor expression, that be selected from least a kind of activation in europium and the samarium
General formula 8: (La
1-x-y-zY
xSm
yEu
z)
2O
2S
In the formula, x, y and z are the values that satisfies 0≤x＜0.99,0≤y＜0.03,0.01＜z＜0.15 and 1-x-y-z>=0.
6. the backlight of a full-color liquid crystal indicator is used White LED, it is characterized in that, possesses:
Light-emitting component, its ejaculation has 1 light of glow peak in the wavelength region may of 360 ~ 430nm, and is at least a kind that is selected from ultraviolet LED, bluish violet light-emitting diode, luminescence-utraviolet laser and the bluish violet emitting laser; With
Luminescent coating, it comprises the green-emitting phosphor that sent green light by said 1 optical excitation, sent the blue emitting phophor of blue light and sent red light by said 1 optical excitation by said 1 optical excitation red-emitting phosphors,
And said green-emitting phosphor constitutes by being selected from fact by the divalent europium of formula 1 expression and manganese activated silicate phosphor and at least a kind of fluorophor being activated in the Sialon phosphor by the europium of formula 2 or 3 expressions in fact,
Said blue emitting phophor by be selected from fact divalent europium by formula 4 expressions activate the halophosphate fluorophor, in fact by the divalent europium-activated aluminate fluorophor of formula 5 expressions, constitute by the silver-activated zinc sulfide fluorophor of formula 6 expressions and at least a kind of fluorophor activating in the zinc sulphide fluorophor by the chlorine of formula 7 expressions in fact in fact
Said red-emitting phosphors is in fact by formula 8 terres rares oxysulfide fluorophor expression, that be selected from least a kind of activation in europium and the samarium,
About the content of the fluorophor of all kinds in the said luminescent coating, with respect to the total amount of whole fluorophor, green-emitting phosphor is 1 ~ 10 weight %, and blue emitting phophor is 40 ~ 80 weight %, and red-emitting phosphors is 10 ~ 50 weight %,
General formula 1: (Sr
2-x-y-z-uBa
xMg
yEu
zMn
u) SiO
4
In the formula, x, y, z and u are the values that satisfies 0.1＜x＜1.0,0≤y＜0.21,0.05＜z＜0.3,0≤u＜0.04,
General formula 2: (Sr
3-xEu
x) Si
yAl
zO
vN
w
In the formula, x, y, z, v and w are the numbers that satisfies 0＜x≤3,12＜y＜14,2＜z＜3.5,1＜v＜3,20＜w＜22,
General formula 3: (Si, Al)
6(O, N)
8: Eu
x
In the formula, x is the number that satisfies 0＜x＜0.3,
General formula 4: (M
2, Eu)
10(PO
4)
6Cl
2
In the formula, M
2Expression is selected from least a kind of element among Mg, Ca, Sr and the Ba,
General formula 5:a (M
3, Eu) ObAl
2O
3
In the formula, M
3Expression is selected from least a kind of element among Mg, Ca, Sr, Ba, Zn, Li, Rb and the Cs, and a and b are the numbers that satisfies 0＜a, 0＜b, 0.2≤a/b≤1.5,
General formula 6: (Zn
1-xAg
x) S
In the formula, x is the number that satisfies 0＜x＜0.01,
General formula 7: (Zn
1-xCl
x) S
In the formula, x is the number that satisfies 0＜x＜0.01,
General formula 8: (La
1-x-y-zY
xSm
yEu
z)
2O
2S
In the formula, x, y and z are the values that satisfies 0≤x＜0.99,0≤y＜0.03,0.01＜z＜0.15 and 1-x-y-z>=0.
7. a full-color backlight for liquid crystal display is characterized in that, it has used each described White LED in the claim 1 ~ 6.
8. a full-color liquid crystal indicator is characterized in that, it is to use the described backlight of claim 7 to make.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-031454 | 2010-02-16 | ||
| JP2010031454 | 2010-02-16 | ||
| PCT/JP2011/053147 WO2011102339A1 (en) | 2010-02-16 | 2011-02-15 | White led for backlight of full-color liquid crystal display device, backlight for full-color liquid crystal display device, and full-color liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN102763232A true CN102763232A (en) | 2012-10-31 |
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|---|---|---|---|
| CN2011800097410A Pending CN102763232A (en) | 2010-02-16 | 2011-02-15 | White led for backlight of full-color liquid crystal display device, backlight for full-color liquid crystal display device, and full-color liquid crystal display device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5732038B2 (en) |
| CN (1) | CN102763232A (en) |
| WO (1) | WO2011102339A1 (en) |
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| WO2014206250A1 (en) * | 2013-06-24 | 2014-12-31 | 北京有色金属研究总院 | Fluorescent powder and light emitting apparatus comprising same |
| CN104916755A (en) * | 2014-03-14 | 2015-09-16 | 株式会社东芝 | Light emitting device and method of manufacturing the same |
| CN107086230A (en) * | 2016-02-12 | 2017-08-22 | 三星显示有限公司 | Organic light emitting diode display |
| CN110556465A (en) * | 2018-05-31 | 2019-12-10 | 日亚化学工业株式会社 | light emitting device |
| CN113608384A (en) * | 2014-11-25 | 2021-11-05 | 东洋纺株式会社 | Liquid crystal display device having a plurality of pixel electrodes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014068440A1 (en) | 2012-11-01 | 2014-05-08 | Koninklijke Philips Electronics N.V. | Led-based device with wide color gamut |
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2011
- 2011-02-15 JP JP2012500596A patent/JP5732038B2/en active Active
- 2011-02-15 WO PCT/JP2011/053147 patent/WO2011102339A1/en active Application Filing
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| JP2007091958A (en) * | 2005-09-29 | 2007-04-12 | Toshiba Corp | Process for producing led lamp emitting white light, process for producing backlight using the lamp and process for producing liquid crystal display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5732038B2 (en) | 2015-06-10 |
| JPWO2011102339A1 (en) | 2013-06-17 |
| WO2011102339A1 (en) | 2011-08-25 |
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