CN103791318B - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN103791318B CN103791318B CN201210434928.1A CN201210434928A CN103791318B CN 103791318 B CN103791318 B CN 103791318B CN 201210434928 A CN201210434928 A CN 201210434928A CN 103791318 B CN103791318 B CN 103791318B
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Abstract
A backlight module comprises a first light emitting element and a second light emitting element. The first light emitting element comprises a first blue-light crystal particle and a first color light emitting layer, the first color light emitting layer has a first color light emitting frequency spectrum which has a first color light emitting frequency spectrum area, at least 70% of the first color light emitting frequency spectrum area is between 500nm and 580nm, the second light emitting element comprises a second blue-light crystal particle and a second color light emitting layer, the second color light emitting layer has a second color light emitting frequency spectrum which has a second color light emitting frequency spectrum area, at least 60% of the second color light emitting frequency spectrum area is between 600nm and 680nm, and a region, exceeding 590nm, in the first color light emitting frequency spectrum has a first area which is smaller than or equal to 10% of the second color light emitting frequency spectrum area.
Description
Technical field
The invention relates to a kind of backlight module, and in particular to a kind of back of the body with light emitting diode (LED)
Optical module.
Background technology
Refer to the chromatic diagrams of CIE 1931 that the international lighting association (CIE) shown in Fig. 1 formulates, the region A shown on figure
The gamut range formulated by CIE associations.The delta-shaped region surrounded by R, G, B three primary colors on this colour gamut coordinate is liquid crystal
The color variation range that display can be presented, that is, the colour gamut for representing the liquid crystal display.In addition, in field of display
Also often the ratio that trichromatic color dot crosses area can be determined with TSC-system with the area that the trichromatic color dot of a display is crossed
(being defined as the ratio of the color dot of display three is crossed on the chromatic diagrams of CIE 1931 area relative to NTSC tolerance zone area) is made
For the normative reference of colour gamut, generally it is referred to as high colour gamut so that the area persons of NTSC more than 80% can be crossed.
Presently, using traditional blue-light-emitting crystal grain mix redness, green fluorescent layer light mixing type LED (B+RG) as
The display of backlight, because it has the green problem that cannot independently separate with red coloured light, therefore is difficult to reach display
High colour gamut require.
The content of the invention
The present invention provides a kind of backlight module, the coloured light that its light mixing type LED is produced can be made independently to be separated, Jin Erke
Meet the requirement of higher color domain display.
One embodiment of the invention provides a kind of backlight module, including one first light-emitting component, and the first light-emitting component includes
One first blue light crystal grain and one first colour light emitting layer, and the first colour light emitting layer has one first colour light emitting frequency spectrum, should
First colour light emitting frequency spectrum has one first colour light emitting frequency spectrum area, the first colour light emitting frequency spectrum area of wherein at least 70%
It is between 500nm to 580nm；And one second light-emitting component, including one second blue light crystal grain and one second color send out
Photosphere, and the second colour light emitting layer has one second colour light emitting frequency spectrum, the second colour light emitting frequency spectrum has one second color
Luminous frequency spectrum area, the second colour light emitting frequency spectrum area of wherein at least 60% is between 600nm to 680nm, wherein first
There is one first area, and the first area less than or equal to the second colour light emitting frequency beyond the region of 590nm in colour light emitting frequency spectrum
The 10% of area under spectrum.
Another embodiment of the present invention provides a kind of backlight module, including one first light-emitting component, the first light-emitting component bag
One first blue light crystal grain and one first colour light emitting layer are included, and the first colour light emitting layer has one first colour light emitting frequency spectrum,
The first colour light emitting frequency spectrum has one first colour light emitting frequency spectrum area, the first colour light emitting frequency plane of wherein at least 70%
Product is between 500nm to 580nm；And one second light-emitting component, including one second blue light crystal grain and one second color
Luminescent layer, and the second colour light emitting layer has one second colour light emitting frequency spectrum, the second colour light emitting frequency spectrum has one second face
The luminous frequency spectrum area of color, the second colour light emitting frequency spectrum area of wherein at least 60% is between 600nm to 680nm, wherein the
Region in the luminous frequency spectrum of second colors less than 590nm has a second area, and second area is less than or equal to the first colour light emitting
The 5% of frequency spectrum area.
In an embodiment, the color that aforementioned first colour light emitting frequency spectrum is showed is green, and the second colour light emitting frequency
The showed color of spectrum is redness.
In an embodiment, backlight module also includes multiple packaging bodies, and the first colour light emitting layer and the second color
Luminescent layer is disposed in identical those packaging bodies.
In an embodiment, aforementioned encapsulation body has respectively two grooves, and the first colour light emitting layer and the second color are sent out
Photosphere is respectively arranged in those grooves.
In an embodiment, backlight module also includes multiple packaging bodies, and the first colour light emitting layer and the second color
Luminescent layer is respectively arranged in those different packaging bodies.
Above-mentioned purpose, feature and advantage to enable the present invention becomes apparent, and preferred embodiment cited below particularly simultaneously coordinates
Institute's accompanying drawings elaborate.
Description of the drawings
Fig. 1 is the color gamut performance for illustrating the chromatic diagrams of CIE 1931 and tradition B+RG LED；
Fig. 2 represents the backlight module sectional view of one embodiment of the invention；
Fig. 3 A represent the luminous spectrum diagram of the first light-emitting component in Fig. 2；
Fig. 3 B represent the luminous spectrum diagram of the second light-emitting component in Fig. 2；
Fig. 3 C represent the luminous spectrum diagram of colour mixture being made up of Fig. 3 A, 3B；
Fig. 4 A represent the schematic diagram that the first colour light emitting frequency spectrum is moved toward short wave ranges；
Fig. 4 B represent the schematic diagram that the second colour light emitting frequency spectrum is moved toward long wave limit；And
Fig. 5 represents the backlight module sectional view of another embodiment of the present invention.
[main element label declaration]
First light-emitting component 100；First blue light crystal grain 101；
First colour light emitting layer 102；First blue light frequency spectrum 101a；
First colour light emitting frequency spectrum 102a, 102a '；Second light-emitting component 200；
Second blue light crystal grain 201；Second colour light emitting layer 202；
Second blue light frequency spectrum 201a；Second colour light emitting frequency spectrum 202a, 202a '；
Support plate 300；First area A1；
Second area A2；First colour light emitting frequency spectrum area AG；
Second colour light emitting frequency spectrum area AR；Groove E1, E2；
Packaging body P；The luminous frequency spectrum S of colour mixture；
First luminous frequency spectrum S1；Second luminous frequency spectrum S2.
Specific embodiment
Fig. 2 is the backlight module generalized section for representing one embodiment of the invention, and as shown in FIG., this backlight module includes
Multiple first light-emitting components 100, multiple second light-emitting components 200, multiple packaging body P and a support plate 300.Packaging body P is to set
It is placed on support plate 300, and each packaging body P includes two groove E1 and E2 with bowl cup configuration, to house respectively
One first light-emitting component 100 and one second light-emitting component 200.Wherein, the first light-emitting component 100 includes one first blue light crystal grain
101 and one first colour light emitting layer 102, and the first colour light emitting layer 102 is at least partly to be covered in the first blue light crystal grain 101
Top；In the same manner, the second light-emitting component 200 includes one second blue light crystal grain 201 and one second colour light emitting layer 202, and second
Colour light emitting layer 202 is at least partly to be covered in the top of the second blue light crystal grain 201.It is to be understood that in the present embodiment, first
Colour light emitting layer 102 is the fluorescence coating with green emitting phosphor, and the second colour light emitting layer 202 is with the glimmering of red fluorescence powder
Photosphere.
It should be noted that aforementioned grooves E1 can have the structure of reflection light with the inner edge wall of groove E2, to strengthen
Light extraction efficiency.And groove E1 and groove E2 may be designed as it is identical be also designed to different shapes, such as groove E1 be it is square, it is recessed
Groove E2 is circle.Groove E1 and E2 can be formed objects, also may be designed as different size, design depending on required light source characteristic.It is recessed
Groove E1 and E2 can independently control whether to light.First colour light emitting layer 102 can fill different from the second colour light emitting layer 202
Deal, end regard design demand.
Fig. 3 A are referred to, aforementioned first light-emitting component 100 has one first luminous frequency spectrum S1, the first luminous frequency spectrum S1 is
It is made up of one first blue light frequency spectrum 101a and one first colour light emitting frequency spectrum 102a, wherein the first blue light frequency spectrum 101a is mainly
By produced by the first blue light crystal grain 101, and the first colour light emitting frequency spectrum 102a is then by the by the first colour light emitting layer 102
The blue light of one blue light crystal grain 101 excite after produced by, the first colour light emitting frequency spectrum 102a in visible wavelength range (380nm～
780nm) have one first colour light emitting frequency spectrum area AG, the first colour light emitting frequency spectrum area AG of wherein at least 70% be between
Between 500nm to 580nm；In the same manner, Fig. 3 B are referred to, aforementioned second light-emitting component 200 has one second luminous frequency spectrum S2, and should
Second luminous frequency spectrum S2 is made up of one second blue light frequency spectrum 201a and one second colour light emitting frequency spectrum 202a, wherein second is blue
Optical spectrum 201a is mainly by produced by the second blue light crystal grain 201, and the second colour light emitting frequency spectrum 202a is then by the second color
Luminescent layer 202 is produced after being excited by the blue light of the second blue light crystal grain 201, and the second colour light emitting frequency spectrum 202a is in visible ray
Wave-length coverage (380nm～780nm) has one second colour light emitting frequency spectrum area AR, the second colour light emitting of wherein at least 60%
Frequency spectrum area is AR between 600nm to 680nm.
The spectrogram shown in Fig. 3 C is referred to, substantially the first colour light emitting frequency spectrum 102a and the can be distinguished with wavelength 590nm
The color of the luminous frequency spectrum 202a of second colors is had a common boundary.When the first colour light emitting frequency spectrum area AG concentrates on the shortwave model of below 590nm
Enclose and the area of long wave limit in first colour light emitting frequency spectrum 102a beyond more than 590nm gets over hour, itself and the second color
The ratio of luminous frequency spectrum 202a crossover colour mixtures is less, that is, the affected ratio of the second color is lower.And when the second color
Luminous frequency spectrum area AR is concentrated on and is less than in the long wave limit of more than wavelength 590nm and second colour light emitting frequency spectrum 202a
The area of the short wave ranges of below 590nm gets over hour, and it is less with the ratio of the first colour light emitting frequency spectrum 102a crossover colour mixtures,
It is exactly that the affected ratio of the first color is lower.When the first color and the interactional ratio of the second color are lower, represent
The first color excitation to be shown with the second color is higher, up to NTSC more than 90%, closer to NTSC triangles
Border is better, also can just meet the requirement of high colour gamut.
In the present embodiment, the first light-emitting component 100 and the second light-emitting component 200 can be controlled respectively and separate radiation, and
First light-emitting component 100 also can light simultaneously with the second light-emitting component 200.By superposition first light frequency spectrum S1 and second light
Frequency spectrum S2 can obtain luminous frequency spectrum S (as shown in Figure 3 C) of colour mixture, and the backlight module of the present embodiment can cover visible wavelength range
(380nm～780nm), and the maximum emission intensity value defined in the luminous frequency spectrum S of colour mixture is 1.0.It is to be understood that aforementioned
The color that the first colour light emitting frequency spectrum 102a of the first luminous frequency spectrum S1 is showed is green, and the second of the second luminous frequency spectrum S2
The color that colour light emitting frequency spectrum 202a is showed is redness.
Please refer to Fig. 3 A～3C, when the first light-emitting component 100 starts light, aforementioned first colour light emitting frequency spectrum
There is one first area A1 beyond the region of 590nm in 102a.To meet during high colour gamut design requirement, the first area A1 and
The ratio of the luminous frequency spectrum area AR overlapping mixed lights of second colors is the smaller the better, and preferably condition is smaller than or waits for the first area A1
In the 10% of the second colour light emitting frequency spectrum area AR；When the second light-emitting component 200 starts light, aforementioned second colour light emitting frequency
Region in spectrum 202a less than 590nm has a second area A2.To meet during high colour gamut design requirement, second area A2 with
The ratio of the first colour light emitting frequency spectrum area AG overlapping mixed lights is the smaller the better, preferably condition be smaller than for second area A2 or
Equal to the 5% of the first colour light emitting frequency spectrum area AR.Above-mentioned condition can be set up respectively, also can set up simultaneously, not limit.And not
When setting up or set up respectively simultaneously by above-mentioned condition, up to NTSC more than 90%.
In a specific embodiment of the invention, such as when the first colour light emitting frequency spectrum 102a shows as green, nitrogen can be adopted
Compound class or sulfide-based or silicates fluorescent material as the first colour light emitting layer 102, wherein with from sulfide-based
Performance is preferable.By Ca, Sr, Ba plasma composition of the adjustment in sulfide-based, or adjust Ca, Sr, the Ba in silicates
Plasma composition, for example, increase Ba or reduce the ratio of Ca or Sr, can cause the first colour light emitting frequency spectrum 102a toward shortwave model
Enclose mobile (102a ' waveforms as shown in Figure 4 A).Now beyond the first of 590nm regions in the first colour light emitting frequency spectrum 102a '
Area A1 can be relatively small, and the first area A1 may be less than or equal to relative to the ratio of the second colour light emitting frequency spectrum area AR
10%。
In another specific embodiment of the present invention, such as when the second colour light emitting frequency spectrum 202a shows as redness, can adopt
Nitride-based or sulfide-based fluorescent material as the second colour light emitting layer 202, wherein with preferable from sulfide-based performance.
By adjust it is nitride-based in N ion components for example increase the ratio of N, or adjust it is sulfide-based in Ca, Sr, Ba etc. from
Subconstiuent for example reduces Ba or increases the ratio of Ca or Sr, and the second colour light emitting frequency spectrum 202a can be caused to move toward long wave limit
(202a ' waveforms as shown in Figure 4 B).Now less than the second area A2 in 590nm regions in the second colour light emitting frequency spectrum 202a '
Can be relatively small, and second area A2 may be less than or equal to 5% relative to the ratio of the first colour light emitting frequency spectrum area AG.
Referring again to Fig. 5, another embodiment of the present invention can also be by the first light-emitting component 100 and the second light-emitting component
200 are respectively arranged in different packaging body P, and are arranged on support plate 300 in pattern interlaced with each other.It is to be understood that
The pattern that backlight module provided in the present invention can enter light with side type or straight-down negative is applied to a liquid crystal display.
Comprehensive described, the present invention provides a kind of backlight module, and it includes one first light-emitting component, the first light-emitting component bag
One first blue light crystal grain and one first colour light emitting layer are included, and the first colour light emitting layer has one first colour light emitting frequency spectrum,
Wherein the first colour light emitting frequency spectrum has one first colour light emitting frequency spectrum area in visible wavelength range (380nm～780nm),
And at least 70% the first colour light emitting frequency spectrum area is between 500nm to 580nm；And one second light-emitting component, including
One second blue light crystal grain and one second colour light emitting layer, and the second colour light emitting layer has one second colour light emitting frequency spectrum, its
In the second colour light emitting frequency spectrum in visible wavelength range (380nm～780nm) have one second colour light emitting frequency spectrum area, and
At least 60% the second colour light emitting frequency spectrum area is between 600nm to 680nm, by designing the first colour light emitting frequency spectrum
In beyond 590nm region have one first area, and the first area less than or equal to the second colour light emitting frequency spectrum area 10%；
Or it is that the region designed in the second colour light emitting frequency spectrum less than 590nm has a second area, and second area is less than or equal to
The 5% of first colour light emitting frequency spectrum area so that the LED type backlight module of the present invention can solve the coloured light frequency of traditional light mixing type LED
Compose interactional problem, and and then provide display high color saturation performance.
Although the present invention is disclosed above with aforesaid embodiment, so it is not limited to the present invention.Skill belonging to of the invention
Have usually intellectual in art field, without departing from the spirit and scope of the present invention, when can do a little change with retouching.Cause
This protection scope of the present invention ought be defined depending on the scope of the appended claims person of defining.
Claims (10)
1. a kind of backlight module, including：
One first light-emitting component, including one first blue light crystal grain and one first colour light emitting layer, the first colour light emitting layer tool
There is one first colour light emitting frequency spectrum, the first colour light emitting frequency spectrum has one first colour light emitting frequency spectrum area, wherein at least
70% the first colour light emitting frequency spectrum area is between 500nm to 580nm；And
One second light-emitting component, including one second blue light crystal grain and one second colour light emitting layer, the second colour light emitting layer tool
There is one second colour light emitting frequency spectrum, the second colour light emitting frequency spectrum has one second colour light emitting frequency spectrum area, wherein at least
60% the second colour light emitting frequency spectrum area is between 600nm to 680nm, to surpass wherein in the first colour light emitting frequency spectrum
The region for going out 590nm has one first area, and first area less than or equal to the 10% of the second colour light emitting frequency spectrum area.
2. backlight module according to claim 1, the color that wherein the first colour light emitting frequency spectrum is showed is green, and
The color that the second colour light emitting frequency spectrum is showed is redness, and wherein the first colour light emitting layer includes nitride-based or sulfide
The fluorescent material of class or silicates, the second colour light emitting layer includes nitride-based or sulfide-based fluorescent material, the wherein sulphur
The fluorescent material of compound class or silicates includes Ca, Sr and Ba ion component.
3. backlight module according to claim 1, the wherein backlight module also include multiple packaging bodies, and first color
Luminescent layer is disposed in the plurality of packaging body of identical with the second colour light emitting layer.
4. backlight module according to claim 3, wherein the plurality of packaging body has respectively two grooves, and first face
Color luminescent layer and the second colour light emitting layer are respectively arranged in those grooves.
5. backlight module according to claim 1, the wherein backlight module also include multiple packaging bodies, and first color
Luminescent layer from the second colour light emitting layer is respectively arranged in different the plurality of packaging bodies.
6. a kind of backlight module, including：
One first light-emitting component, including one first blue light crystal grain and one first colour light emitting layer, the first colour light emitting layer tool
There is one first colour light emitting frequency spectrum, the first colour light emitting frequency spectrum has one first colour light emitting frequency spectrum area, wherein at least
70% the first colour light emitting frequency spectrum area is between 500nm to 580nm；And
One second light-emitting component, including one second blue light crystal grain and one second colour light emitting layer, the second colour light emitting layer tool
There is one second colour light emitting frequency spectrum, the second colour light emitting frequency spectrum has one second colour light emitting frequency spectrum area, wherein at least
60% the second colour light emitting frequency spectrum area be between 600nm to 680nm, it is wherein low in the second colour light emitting frequency spectrum
There is a second area, and the second area less than or equal to the 5% of the first colour light emitting frequency spectrum area in the region of 590nm.
7. backlight module according to claim 6, the color that wherein the first colour light emitting frequency spectrum is showed is green, and
The color that the second colour light emitting frequency spectrum is showed is redness, and wherein the first colour light emitting layer includes nitride-based or sulfide
The fluorescent material of class or silicates, the second colour light emitting layer includes nitride-based or sulfide-based fluorescent material, the wherein sulphur
The fluorescent material of compound class or silicates includes Ca, Sr and Ba ion component.
8. backlight module according to claim 6, the wherein backlight module also include multiple packaging bodies, and first color
Luminescent layer is disposed in the plurality of packaging body of identical with the second colour light emitting layer.
9. backlight module according to claim 8, wherein the plurality of packaging body has respectively two grooves, and first face
Color luminescent layer and the second colour light emitting layer are respectively arranged in those grooves.
10. backlight module according to claim 6, the wherein backlight module also include multiple packaging bodies, and first face
Color luminescent layer from the second colour light emitting layer is respectively arranged in different the plurality of packaging bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434928.1A CN103791318B (en) | 2012-11-05 | 2012-11-05 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434928.1A CN103791318B (en) | 2012-11-05 | 2012-11-05 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103791318A CN103791318A (en) | 2014-05-14 |
| CN103791318B true CN103791318B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210434928.1A Active CN103791318B (en) | 2012-11-05 | 2012-11-05 | Backlight module |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104537954A (en) * | 2014-11-24 | 2015-04-22 | 苏州佳世达电通有限公司 | Flat panel display device and backlight generation method |
| CN104914623A (en) | 2015-06-19 | 2015-09-16 | 深圳市华星光电技术有限公司 | Light-emitting unit and backlight source with light-emitting units |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1985196B (en) * | 2004-07-15 | 2010-06-23 | 索尼株式会社 | Color filter and color liquid crystal display device |
| CN101038397B (en) * | 2006-03-16 | 2010-04-14 | 奇美电子股份有限公司 | LCD display module |
| JP4989936B2 (en) * | 2006-07-27 | 2012-08-01 | 株式会社朝日ラバー | Lighting device |
| CN101832518A (en) * | 2009-03-11 | 2010-09-15 | 旭明光电股份有限公司 | Luminescent device of light-emitting diode with compound phosphor layers |
| CN202511145U (en) * | 2012-04-12 | 2012-10-31 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display |
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Address after: 518109 Guangdong, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Applicant after: Innolux Display Group Address before: 518109 Guangdong, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Applicant before: Chimei Optoelectronics Co., Ltd. |
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