CN202521397U - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN202521397U CN202521397U CN2012200491298U CN201220049129U CN202521397U CN 202521397 U CN202521397 U CN 202521397U CN 2012200491298 U CN2012200491298 U CN 2012200491298U CN 201220049129 U CN201220049129 U CN 201220049129U CN 202521397 U CN202521397 U CN 202521397U
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Abstract
The utility model relates to a backlight module, which comprises a light source, a light guide plate and an optical film group. The light guide plate comprises an incident surface and an emergent surface. The light source is arranged on an incident surface side, and the optical film group is arranged on an emergent surface side. The optical film group comprises a plurality of laminated optical films. The optical film which is closest to the emergent surface in the optical film group is a quantum film, and the quantum film is a laminar film comprising a plurality of first quantum dots, a plurality of second quantum dots and a transparent substrate, wherein the first and second quantum dots are uniformly dispersed in the transparent substrate. Compared with the prior art, the backlight module has the advantages that a backlight source can have a better color tone by the combination of the light source and the quantum film in the backlight module, and a larger color coverage area can be obtained on a commission international eclairage (CIE) chromaticity diagram, so that the color reproducibility of a display device employing the backlight module is improved.
Description
Technical field
The utility model relates to the Display Technique field, particularly a kind of module backlight.
Background technology
Colour gamut (Color Space), the color space that is otherwise known as, on behalf of a color image, it can show the color concrete condition of color space.We are in the computer monitor application facet; It how is the colour gamut definition of standard with sRGB (sRGB is the abbreviation of standard Red Green Blue); And in audio-visual application facet; The NTSC (NTSC is the abbreviation of National Television Standards Committee) that is mostly that adopts defines; NTSC is responsible for exploitation one cover standard television broadcast transmitted and is received agreement by National Television System Committee (National Television Standards Committee), and is wider than sRGB standard aspect color degree of containing.
Appearing of colour gamut is mainly in the selection backlight that well-known, liquid crystal panel itself is not luminous; But utilizing the light that sends backlight can display frame, traditional cold cathodouminescence fluorescent tube (Cold Cathode Fluorescent Lamp is called for short CCFL) is owing to receive the restriction of fluorescent material; It is on the weak side that ruddiness presents ability; The colour mixture effect that adds the colored filter of being arranged in pairs or groups is relatively poor, and the colour gamut saturation degree that finally appears is not good, causes LCD-type (the Liquid Crystal Display of present main flow; Abbreviation LCD) monitor or television presents deficiency on the ability in colour gamut, how only can reach about 72%NTSC.
Novel W-CCFL (wide colour gamut backlight lamp tube) can certain degree the colour gamut of improving present problem; Effectively strengthen color saturation; The multi-color filter novel if arrange in pairs or groups (added the optical filter like colors such as yellow, cyan or whites beyond the RGB three primary colors; Present ability so as to increasing color), on display capabilities, can also further promote.Optical filter is helpful to the colour gamut performance, but amplitude is little, influences colour gamut and presents ability mainly still aspect back light model setting technology.W-CCFL just improves in the fluorescent material, only changes W-CCFL module backlight, just can the colour gamut saturation degree be improved, but because the defective of CCFL self, for example volume is big, power consumption is high, no longer is fit to frivolous to display unit at present, environmental protection requirement.
The utility model content
The utility model provides a kind of module backlight, has higher colour gamut saturation degree.
For reaching above-mentioned advantage, the utility model provides a kind of module backlight.This module backlight comprises LED source, LGP and optical diaphragm group.This LGP comprises incidence surface and exiting surface, and this LED source is arranged at this incidence surface side, and this optical diaphragm group is arranged at this exiting surface side, and this optical diaphragm group comprises the blooming piece of a plurality of range upon range of settings.This optical diaphragm group is the quantum film near the blooming piece of this exiting surface; This quantum film is the laminar film that comprises a plurality of first quantum dots, a plurality of second quantum dot and transparent base, and these a plurality of first quantum dots and these a plurality of second quantum dots are dispersed in this transparent base.
In an embodiment of the utility model, this LED source has first emission spectrum, and these a plurality of first quantum dots have second emission spectrum, and these a plurality of second quantum dots have the 3rd emission spectrum.
In an embodiment of the utility model, this first emission spectrum is a blue spectrum, and this second emission spectrum is a red-light spectrum, and the 3rd emission spectrum is a green spectrum.
In an embodiment of the utility model, this LED source is a blue light-emitting diode.
In an embodiment of the utility model, this LED source comprises support, blue light emitting chip and water white transparency packaging body, and this blue light emitting chip is arranged on this support, and this water white transparency packaging body covers this blue light emitting chip.
In an embodiment of the utility model, the adjacent setting of this incidence surface with this exiting surface.
In an embodiment of the utility model, this incidence surface and this exiting surface are oppositely arranged.
In an embodiment of the utility model, this optic film set further comprises prismatic lens, and this quantum film is arranged between this exiting surface and this prismatic lens.
In an embodiment of the utility model, this optic film set further comprises diffusion sheet, and this prismatic lens is arranged between this quantum film and this diffusion sheet.
In an embodiment of the utility model, this prismatic lens comprises vertical prism sheets and horizon prism sheet.
With respect to prior art; The utility model can make backlight have better tone through the combination of LED source in the module backlight and quantum film; In the CIE1931 color coordinate system, realize bigger color coverage; Just have higher colour gamut saturation degree, thereby can improve the color rendition ability of the display unit that adopts above-mentioned module backlight.
For let the above-mentioned of the utility model and other purpose, feature and advantage can be more obviously understandable, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Fig. 1 is the side view of module backlight among the utility model first embodiment.
Fig. 2 is the structural representation of the included blue light-emitting diode of module backlight among first embodiment.
Fig. 3 is the side view of module backlight among the utility model second embodiment.
Fig. 4 is module backlight and the comparison diagram of the color coverage of module backlight of the prior art in the CIE1931 color coordinate system among the utility model first embodiment.
The specific embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked; Below in conjunction with accompanying drawing and preferred embodiment; To its concrete structure of module backlight, characteristic and the effect that proposes according to the utility model, specify as after.
The module a kind of backlight of the utility model preferred embodiment mainly is applicable to display unit, for example liquid crystal indicator.
Fig. 1 is the side view of module backlight among the utility model first embodiment.Please with reference to Fig. 1, the module backlight 10 that the utility model first embodiment provides is side-light type module backlight, and it comprises LED source 12, LGP 14 and optical diaphragm group 16.
LGP 14 comprises incidence surface 140, exiting surface 142 and bottom surface 144; In present embodiment; Exiting surface 142 is oppositely arranged with bottom surface 144, incidence surface 140 respectively with exiting surface 142 and bottom surface 144 adjacent settings, we can say that also incidence surface 140 connects exiting surface 142 and bottom surfaces 144.Bottom surface 144 1 sides of LGP 14 can also be provided with reflecting plate 18, in the light reflected back LGP 14 that will be exposed by bottom surface 144, improve the utilization rate of light with this, increase brightness.Certainly, also can plate one deck reflectance coating through the bottom surface at LGP 14 and realize the effect identical with reflecting plate 18, the utility model is not as limit.
In present embodiment, LED source 12 has first emission spectrum, is preferably a plurality of blue light-emitting diodes 120, that is to say that first emission spectrum that LED source 12 is had is a blue spectrum.Incidence surface 140 1 sides that a plurality of blue light diodes 120 form a line and are arranged at LGP 14.Please with reference to Fig. 2, blue light-emitting diode 120 can comprise support 122, blue light emitting chip 124 and water white transparency packaging body 126.Blue light emitting chip 124 is arranged on the support 122, and water white transparency packaging body 126 covers blue light emitting chip 124.Water white transparency packaging body 126 for example is colourless silica gel.Certainly, the structure of blue light-emitting diode 120 is not limited to this, also can adopt the light emitting diode of other structures, as long as its emission spectrum is a blue spectrum.
Specifically, first quantum dot 1600 and second quantum dot 1602 are nanocrystalline, are formed by II-VI family or III-V family element, and cause quantum limitation effect.II-VI family is nanocrystalline to be selected from, but is not limited to the group be made up of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe and HgTe.III-V family is nanocrystalline to be selected from, but is not limited to the group be made up of GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs and GaNP.
Preferably, the diameter of first quantum dot 1600 and second quantum dot 1602 is about 1nm to 10nm.Can emitting fluorescence after first quantum dot 1600 and second quantum dot 1602 are excited.In present embodiment, a plurality of first quantum dots 1600 have second emission spectrum after receiving blue-light excited that LED source 12 sends, and second emission spectrum is a red-light spectrum, can claim that also first quantum dot 1600 is red quantum dot.A plurality of second quantum dots 1602 have the 3rd emission spectrum after receiving blue-light excited that LED source 12 sends, and the 3rd spectrum is green spectrum, can claim that also second quantum dot 1602 is green quantum dot.Owing to compare with the phosphor of routine, quantum dot can produce stronger light in narrower wave band, and therefore first quantum dot 1600 and second quantum dot 1602 can be arranged in the narrower zone of color coordinate.Therefore, the combination of the 3rd emission spectrum (green spectral) that has of first emission spectrum (blue spectrum) that has of LED source 12, second emission spectrum (red-light spectrum) that first quantum dot 1600 has and second quantum dot 1602 can make backlight have better tone.
Shown in Figure 4 is the comparison diagram of module backlight 10 and the color coverage of module backlight in the CIE1931 color coordinate system of available technology adopting traditional cold cathodouminescence fluorescent tube among the utility model first embodiment.The coordinate of module backlight 10 in the CIE1931 color coordinate system of the utility model is: ruddiness (0.66,0.3069), green glow (0.2541,0.6793), blue light (0.1472; 0.0506), its color coverage is 93.2%NTSC, and the coordinate of module backlight in the CIE1931 color coordinate system of prior art is: ruddiness (0.63; 0.3369), green glow (0.3041; 0.6193), blue light (0.1572,0.0506), its color coverage is 71.7%NTSC.As can beappreciated from fig. 4, the module backlight of the utility model is realized bigger color coverage in the CIE1931 color coordinate system, just have higher colour gamut saturation degree, thereby can improve the color rendition ability of the display unit that adopts above-mentioned module backlight.
Certainly, the light of expectation emission spectrum can be obtained to have, the size of first quantum dot 1600 and second quantum dot 1602 can be controlled through the nanocrystalline growth conditions of appropriate change through the size of controlling first quantum dot 1600 and second quantum dot 1602.In addition, through controlling the concentration and the ratio of first quantum dot 1600 and second quantum dot 1602, also can control wavelength and intensity after first, second and third emission spectrum superposes.Because in the utility model, first quantum dot 1600 and second quantum dot 1602 are dispersed in the quantum film 160, so entire aphototropism mould 10 can have uniform color coordinate.In addition; In module 10 backlight; Owing to be arranged in 160 minutes at LED source 12 and quantum film; Through the concentration of control first quantum dot 1600 and second quantum dot 1602 and the color coordinate of ratio acquisition expectation, be appreciated that the emission spectrum of LED source 12, first quantum dot 1600 and second quantum dot 1602 of the utility model is not limited to the foregoing description more easily; For example LED source 12 can have red-light spectrum, and obtains to cover with red-light spectrum stack back the emission spectrum of whole visible region through size, concentration and the ratio of controlling first quantum dot 1600 and second quantum dot 1602.
In addition; The module backlight of the utility model also can adopt down straight aphototropism mode set; Fig. 3 is the side view of module backlight among the utility model second embodiment; Please with reference to Fig. 3, the module backlight 20 among the utility model second embodiment comprises LED source 22, LGP 24 and optical diaphragm group 26.LGP 24 comprises incidence surface 240 and exiting surface 242, and in present embodiment, exiting surface 242 is oppositely arranged with incidence surface 240.LED source 22 is near a side setting of incidence surface 240, and optical diaphragm group 26 is near a side setting of exiting surface 242, and the light that LED source 22 sends is injected optical diaphragm group 26 by exiting surface 242 after getting into LGP 24 by incidence surface 240 again.Be quantum film 260 near the blooming piece of LGP exiting surface 242 in the optical diaphragm group 26.LED source 22 can also be provided with reflecting plate 28 away from a side of LGP 24, is used to improve the utilization rate of light.Quantum film 260 is the laminar film that comprises a plurality of first quantum dots 2600, a plurality of second quantum dot 2602 and transparent base 2604.A plurality of first quantum dots 2600 and a plurality of second quantum dot 2602 are dispersed in the transparent base 2604.LED source 22 has first emission spectrum; A plurality of first quantum dots 2600 receive has second emission spectrum after first emission spectrum excites; A plurality of second quantum dots 2602 receive has the 3rd emission spectrum after first emission spectrum excites; Its concrete structure and performance are identical with first embodiment, repeat no more here.
In sum; With respect to prior art; The utility model can make backlight have better tone through the combination of LED source in the module backlight and quantum film; In the CIE1931 color coordinate system, realize bigger color coverage, just have higher colour gamut saturation degree, thereby can improve the color rendition ability of the display unit that adopts above-mentioned module backlight.
The above only is the embodiment of the utility model, is not the utility model is done any pro forma restriction; Though the utility model discloses as above with embodiment; Yet be not in order to limiting the utility model, anyly be familiar with the professional and technical personnel, in not breaking away from the utility model technical scheme scope; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from the utility model technical scheme content, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of the utility model technical scheme according to the technical spirit of the utility model.
Claims (10)
1. module backlight; Comprise: light source, LGP and optical diaphragm group; This LGP comprises incidence surface and exiting surface, and this LED source is arranged at this incidence surface side, and this optical diaphragm group is arranged at this exiting surface side; This optical diaphragm group comprises the blooming piece of a plurality of range upon range of settings; It is characterized in that: this optical diaphragm group is the quantum film near the blooming piece of this exiting surface, and this quantum film is the laminar film that comprises a plurality of first quantum dots, a plurality of second quantum dot and transparent base, and these a plurality of first quantum dots and these a plurality of second quantum dots are dispersed in this transparent base.
2. module backlight as claimed in claim 1 is characterized in that this LED source has first emission spectrum, and these a plurality of first quantum dots have second emission spectrum, and these a plurality of second quantum dots have the 3rd emission spectrum.
3. module backlight as claimed in claim 2 is characterized in that, this first emission spectrum is a blue spectrum, and this second emission spectrum is a red-light spectrum, and the 3rd emission spectrum is a green spectrum.
4. module backlight as claimed in claim 1 is characterized in that, this LED source is a blue light-emitting diode.
5. module backlight as claimed in claim 4 is characterized in that, this LED source comprises support, blue light emitting chip and water white transparency packaging body, and this blue light emitting chip is arranged on this support, and this water white transparency packaging body covers this blue light emitting chip.
6. like each described module backlight of claim 1 to 5, it is characterized in that the adjacent setting of this incidence surface with this exiting surface.
7. like each described module backlight of claim 1 to 5, it is characterized in that this incidence surface and this exiting surface are oppositely arranged.
8. module backlight as claimed in claim 1 is characterized in that this optic film set further comprises prismatic lens, and this quantum film is arranged between this exiting surface and this prismatic lens.
9. module backlight as claimed in claim 8 is characterized in that this optic film set further comprises diffusion sheet, and this prismatic lens is arranged between this quantum film and this diffusion sheet.
10. like claim 8 or 9 described modules backlight, it is characterized in that this prismatic lens comprises vertical prism sheets and horizon prism sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200491298U CN202521397U (en) | 2012-02-15 | 2012-02-15 | Backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200491298U CN202521397U (en) | 2012-02-15 | 2012-02-15 | Backlight module |
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| CN202521397U true CN202521397U (en) | 2012-11-07 |
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| CN103698937A (en) * | 2013-12-04 | 2014-04-02 | 苏州佳世达电通有限公司 | Display device and backlight module thereof |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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Granted publication date: 20121107 |