CN206947373U - Led lamp bead and led light source - Google Patents

Abstract

LED light source technical field is the utility model is related to, more particularly to a kind of LED lamp bead and LED light source with quantum dot diaphragm.The LED lamp bead includes support, PCB, LED chip, packaging plastic and quantum dot diaphragm, the groove of the opening of band one is opened up on the support, the LED chip and PCB are all located in groove, and the LED chip is fixed on PCB and is electrically connected with PCB, and the PCB is fixed on support, the packaging plastic is filled in groove, and LED chip and PCB embeddings, the quantum dot diaphragm is located above packaging plastic, and its edge is fixed on support and the closure of openings.The LED light source employs above-mentioned LED lamp bead.LED lamp bead of the present utility model and LED light source have the advantages of gamut range is wide.

Description

LED lamp bead and LED light source

【Technical field】

LED technology field is the utility model is related to, more particularly to a kind of LED lamp bead and LED light with quantum dot diaphragm Source.

【Background technology】

The application of LED lamp bead is quite varied, but people require more and more higher for the gamut range of LED lamp bead.It is and existing LED lamp bead white light is typically induced using " blue-ray LED+yellow fluorescent powder ", its gamut range can not meet people gradually Demand.

Therefore, how to provide a kind of gamut range wide LED lamp bead, turn into the demand of LED technology field development！

【Utility model content】

For the narrow technical problem of the LED lamp bead gamut range overcome, it is wide that the utility model provides a kind of gamut range LED lamp bead and LED light source.

The scheme that the utility model solves technical problem is to provide a kind of LED lamp bead, and the LED lamp bead includes support, PCB, LED chip, packaging plastic and quantum dot diaphragm, the groove of the opening of band one, the LED chip and PCB all positions are opened up on the support In in groove, the LED chip is fixed on PCB and is electrically connected with PCB, and the PCB is fixed on support, the encapsulation Glue is filled in groove, and LED chip and PCB embeddings, the quantum dot diaphragm is located above packaging plastic, and its edge is fixed on On support and the closure of openings.

Preferably, the support includes bottom plate and side plate, and the side plate is integrally formed at the edge of bottom plate, the bottom plate and Side plate surrounds the groove, and the one end of the side plate away from bottom plate forms the opening, and at end of the side plate away from bottom plate Portion sets a concave step, and the edge of the quantum dot diaphragm is ridden upon in concave step.

Preferably, the step surface width of the concave step is 1-10mm.

Preferably, the one end of the side plate away from bottom plate tilts to the direction away from LED chip.

Preferably, the LED lamp bead also includes external positive pole and external negative pole, and the external positive pole and external negative pole are all solid Due at least offering first through hole, the second through hole and third through-hole on support outer wall, the support, the LED chip passes through The first through hole is connected with external positive pole, is electrically connected with by second through hole and external negative pole, and the LED lamp bead is also wrapped Include heat sink, described heat sink in the third through-hole, and the inside of heat sink one end connection LED support, the other end is exposed outside, And heat sink and external positive pole or external cathode contact.

Preferably, the quantum dot diaphragm includes the quantum layer that is formed between two transparent film layers, in the quantum layer It is even that quantum dot and packaging plastic is distributed with；Or the quantum dot diaphragm is evenly distributed with quantum dot, packaging plastic and acrylic powder.

Preferably, the quantum dot diaphragm is to be prefabricated into or coiled quantum dot diaphragm is reduced and formed.

The utility model also provides a kind of LED light source, and the LED light source uses above-mentioned LED lamp bead.

Preferably, the LED light source further comprises chassis, diffusion sheet and brightness enhancement film, and opening up one on the chassis includes Second groove of the second opening, the LED lamp bead are arranged at the bottom of the second groove and fixation, the diffusion sheet and brightness enhancement film Stack successively, both edges are all fixed on the second opening, the diffusion sheet and brightness enhancement film and the second closure of openings, described Diffusion sheet is than brightness enhancement film closer to LED lamp bead.

Preferably, face of the brightness enhancement film away from LED lamp bead is exiting surface, the light and exiting surface that the LED lamp bead is sent Minimum angles be that the distance between A, the LED lamp beads is D1, distance of the LED lamp bead away from exiting surface is H, D1≤ 2HcotA。

Compared with prior art, LED lamp bead of the present utility model includes support, PCB, LED chip, packaging plastic and quantum Diaphragm is put, the groove of the opening of band one is opened up on the support, the LED chip and PCB are all located in groove, the LED chip It is fixed on PCB and is electrically connected with PCB, the PCB is fixed on support, and the packaging plastic is filled in groove, and LED Chip and PCB embeddings, the quantum dot diaphragm are located above packaging plastic, and its edge is fixed on support and the opening is sealed Closing, the light that quantum dot diaphragm is sent by LED chip excites caused light gamut range wide, improves the gamut range of LED lamp bead, And LED lamp bead of the present utility model is simple in construction, easily make, save cost, brightness is high.

Support of the present utility model includes bottom plate and side plate, and the side plate is integrally formed in the edge of bottom plate, the bottom plate The groove is surrounded with side plate, the one end of the side plate away from bottom plate forms the opening, and in the side plate away from bottom plate The concave step of end set one, the edge of the quantum dot diaphragm are ridden upon in concave step, so that the light that LED lamp bead is sent is all To be passed through from quantum dot diaphragm, the light color for sending LED lamp bead is single, does not have veiling glare.

The one end of side plate of the present utility model away from bottom plate tilts to the direction away from LED chip, improves LED lamp bead Lighting angle.

LED lamp bead of the present utility model also includes external positive pole and external negative pole, and the external positive pole and external negative pole are all Support outer wall is fixed on, first through hole, the second through hole and third through-hole are at least offered on the support, the LED chip is led to Cross the first through hole to connect with external positive pole, be electrically connected with by second through hole and external negative pole, the LED lamp bead is also It is described heat sink in the third through-hole including heat sink, and the inside of heat sink one end connection LED support, the other end it is exposed Outside, it is and heat sink with external positive pole or external cathode contact, the heat sink temperature for reducing electrode being exceedingly fast, further speed up reduction The temperature of LED chip, LED chip is maintained at a good state, extend the life-span of LED lamp beads.

Quantum dot diaphragm of the present utility model includes the quantum layer that is formed between two transparent film layers, in the quantum layer It is even that quantum dot and packaging plastic is distributed with；Or the quantum dot diaphragm is evenly distributed with quantum dot, packaging plastic and acrylic powder, amount Son point diaphragm structure is simple, so as to easily make, reduces the cost of manufacture of LED lamp bead, the light excitation quantum that LED chip is sent Point diaphragm, the light gamut range for sending LED lamp bead are wide.

LED light source of the present utility model employs above-mentioned LED lamp bead, photochromic caused by LED light source of the present utility model Domain scope is wide, and LED light source of the present utility model is simple in construction, easily makes, and saves cost, and brightness is high.

Face of the brightness enhancement film of the present utility model away from LED lamp bead is exiting surface, the light and exiting surface that the LED lamp bead is sent Minimum angles be that the distance between A, the LED lamp beads is D1, distance of the LED lamp bead away from exiting surface is H, D1≤ 2HcotA, partially overlapped so as to which the light sent between LED lamp bead has, make LED light source illumination effect more preferable.

【Brief description of the drawings】

Fig. 1 is the cross-sectional view of the utility model LED lamp bead.

Fig. 2 is the cross-sectional view of the utility model support.

Fig. 3 is the propagation path schematic diagram of the light of the utility model LED lamp bead.

Fig. 4 is a kind of cross-sectional view of deformation of the utility model LED lamp bead.

Fig. 5 is the cross-sectional view of another deformation of the utility model LED lamp bead.

Fig. 6 is the cross-section structure partial schematic diagram of the utility model LED light source.

【Embodiment】

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only solving The utility model is released, is not used to limit the utility model.

Referring to Fig. 1, the utility model provides a kind of LED lamp bead 10, including support 11, PCB12 (Printed Circuit Board, printed circuit board (PCB)), LED chip 13, packaging plastic 14, quantum dot diaphragm 15 and external electrode 16.Support 11 On open up a groove, LED chip 13 and PCB12 are all located in groove, and LED chip 13 is fixed on PCB12 and electrical with PCB12 Connection, packaging plastic 14 is filled in groove, and LED chip 13 and PCB12 embeddings, quantum dot diaphragm 15 are located at packaging plastic 14 Top, its edge are fixed on support 11, and external electrode 16 is fixed on the outer wall of support 11, and PCB12 and external electrode 16 are electrical Connection.After LED chip 13 is electrically conducted by PCB12 and external electrode 16, LED chip 13 sends exciting light, and exciting light passes through After packaging plastic 14 and quantum dot diaphragm 15, excitation light becomes new light beam.

Referring to Fig. 2, support 11 includes bottom plate 112 and side plate 114, side plate 114 is integrally formed at the edge of bottom plate 112, Bottom plate 112 and side plate 114 surround aforementioned grooves, and end of the side plate 114 away from bottom plate 112 forms an opening 111, LED chip 13 The light sent projects from opening 111.For quantum dot diaphragm positioned at 15 positioned at the top of packaging plastic 14, it is remote that its edge is fixed on side plate 114 From bottom plate 112 end and opening 111 is closed.So that the light that LED chip is sent is mainly from the quantum dot diaphragm at opening 111 15 project, namely quantum dot diaphragm 15 is located at the main light direction of LED chip 13.Preferably, the shape and opening of bottom plate 112 111 shape is consistent, and it can be square, circular or other irregular shapes, preferably circular.Support 11 uses heatproof, insulation Opaque material, preferably poly- terephthalate p-phenylenediamine, ceramics, or epoxy-plastic packaging material.

Through hole 116 is offered on bottom plate 112, it is such as outer so that necessary element connects with the element in the groove of support 11 Receiving electrode 16 and PCB12 are electrically connected with.The quantity of through hole 116 can open up as needed.It is appreciated that through hole 116 can also be opened It is located on side plate 114.

Side plate 114 and bottom plate 112 are substantially vertical, and a concave step is set in the one end of side plate 114 away from bottom plate 112 118, the edge of quantum dot diaphragm 15 is ridden upon in concave step 118.The step surface width d of concave step 118 is 1-10mm, Preferably 1.5-5mm, so as to which the area for the quantum dot diaphragm 15 placed in concave step 118 is more than the area of bottom portion of groove, The light that can send the LED chip 13 on PCB12 completely extends across quantum dot diaphragm 15.The height h of concave step 118 is equal to amount The thickness of son point diaphragm 15, face of the quantum dot diaphragm 15 away from bottom plate 112 is concordant with the end of side plate 114, so as to side plate 114 not The light through quantum dot diaphragm 15 can be blocked, improves the luminous efficiency of LED lamp bead 10.Selected as one kind, side plate 114 is remote One end from bottom plate 112 tilts towards the direction away from LED chip 13, bigger so as to the rising angle of LED lamp bead 10.

PCB12 is fixed on the bottom of groove.Preferably, PCB12 is fixed on the center of bottom portion of groove.So as to be fixed on The light that LED chip 13 on PCB12 is sent to surrounding irradiate when, the ratio of light distribution is more uniform.In single LEDs lamp bead 10 Fixed LED chip 13 is at least one on PCB12.Preferably, LED chip fixed on the PCB12 in single LEDs lamp bead 10 13 one and only one, so as to the small volume of LED lamp bead 10, save the use of quantum dot diaphragm 15, reduce LED lamp bead 10 Cost.

LED chip 13 sends exciting light as excitation source, and blue light, purple light, feux rouges, green glow, ultraviolet leds can be selected in it Chip 13 etc., preferably blue-light LED chip 13 or purple LED chip 13.LED chip 13 uses formal dress or the anti-form filled It is fixed on PCB12 and is electrically conducted with PCB12.For packed LED chip 13 when, using die bond processing procedure and beat wire processing procedure handle LED chip 13 is arranged on PCB12, the dispensing such as on PCB12, LED chip 13 is placed at dispensing, and exist according to colloid property Normal temperature solidifies colloid in heating, LED chip 13 is secured firmly on PCB12, and with gold thread, aluminum steel or other Wire is electrically connected with LED chip 13 and PCB12.When instead to fill LED chip 13, LED chip 13 is pacified using die bond processing procedure On PCB12, such as in elargol, the weldering on crystal bonding area and PCB at elargol LED chip 13 on point at PCB12 solder joint Point-polarity is corresponding to be placed, and is melted elargol according to the characteristic of elargol, heating, the crystal bonding area of LED chip 13 is entered with PCB12 solder joints Row welding, LED chip 13 are secured firmly on PCB12.Preferably, LED chip 13 is fixed on PCB12 using anti-dress mode, Without reusing extra wire, reduce the stop of the light sent to LED chip.The refractive index of LED chip 13 is 2.0- 2.8。

Preferably, silica gel of the packaging plastic 14 from refractive index between 1.3-1.7, more preferably refractive index is in 1.4- Silica gel between 1.54, and the silica gel light transmittance selected is more than or equal to 96%, so as to which luminous efficiency improves.

The thickness of quantum dot diaphragm 15 is 2-3mm, and its thinner thickness, the refraction on light is substantially without influence.Quantum dot film Piece 15 includes the quantum dot of two kinds and above color, under the irradiation of exciting light, emission spectrum is produced, by controlling excitation source Centre wavelength and two or more colors quantum dot chromaticity coordinates so that LED lamp bead 10 realizes 80%~110% NTSC colors Domain scope.

Quantum dot is generally made up of the A of IIB in the periodic table of elements~VI or IIIA~VA races element material, and its particle diameter is usual In 2~20nm.For quantum dot because electronics and hole are by quantum confinement, continuous band structure becomes have the discrete of molecular characterization Level structure, fluorescence can be launched after being excited.Quantum dot has advantages below：First, the emission spectrum of quantum dot can pass through The size for changing quantum dot is controlled, and its emission spectrum can be made to cover whole visible region.Measured with CdTe (cadmium telluride) Exemplified by son point, when its particle diameter grows into 4.0nm from 2.5nm, their launch wavelength can move on to 660nm from 510nm, its Corresponding color turns to green from red change；Second, quantum dot has good photostability；Third, quantum dot have it is wide PLE and narrow emission spectra, i.e., achieved that to synchronize the quantum dot of different-grain diameter using same excitation source and excite, Produce the color of multiple spectrum wavelength；Fourth, the fluorescence lifetime length of quantum dot, is the 3~4 of organic fluorescent dye fluorescence lifetime Times, thus it is same excite light irradiation under, can be improved using brightness of the quantum dot than inducing white light using yellow fluorescent powder 10%~15%.Because quantum dot has good photostability, and there is wide excitation spectrum and narrow emission spectra, so phase For inducing white light using the mode of blue-ray LED and yellow fluorescent powder, the LED of the utility model embodiment offer is used White light caused by lamp bead 10 has broader gamut range, solves white light gamut range in the prior art and can not meet Display Technique It is required that problem, realizes the effect for improving the gamut range of LED lamp bead 10.

In the utility model embodiment, NTSC represents (U.S.) national television system committee, and NSTC gamut ranges are The summation of color under NTSC standard.

Alternatively, the centre wavelength of blue light excitation source is between 450nm~490nm；The center of purple light excited light source Wavelength is between 380nm~425nm.Blue light excitation source and purple light excited light source can be light emitting diode.Preferably, Quantum dot diaphragm 15 includes red quantum dot, green quantum dot and blue quantum dot.Red quantum dot refers to the transmitting of quantum dot Color corresponding to spectrum is red.Green quantum dot refers to color corresponding to the emission spectrum of quantum dot for green.Blue quantum Point refers to color corresponding to the emission spectrum of quantum dot for blueness.It is appreciated that the LED chip of other coloured light can also be used to make For excitation source, such as feux rouges, gold-tinted, green glow etc., the green quantum dot being stimulated sends green glow, the red quantum dot hair being stimulated Go out green glow, the blue quantum dot being stimulated sends blue light, and quantum dot is stimulated shape after the three kinds of Colored light mixings of red, green, blue sent Into white light.

In other embodiments, quantum dot diaphragm 15 can also be set to include red quantum dot and green quantum dot, and Selective exitation light source is that blue light excitation source makes LED lamp bead 10 produce white light.It is appreciated that three kinds of face of red, green, blue can be selected The quantum dot of two kinds of colors in color, sent out from the light source for the light for sending a kind of remaining color as excitation source, excitation source The light that the light and the quantum dot of other two color gone out is sent, include the light of three kinds of colors of red, green, blue, the light mixing of three kinds of colors Send afterwards and white light.From during the quantum dot of two kinds of colors, being preferably red in the quantum dot of three kinds of colors of red, green, blue Quantum dot and green quantum dot.

Quantum dot diaphragm 15 can be by red quantum dot, and green quantum dot and blue quantum press ratio mixing, and with encapsulation Stir after glue mixing, coated between two layers of acrylic film, and be formed by curing through low temperature and pressure；Or quantum dot diaphragm 15 by Red quantum dot, green quantum dot and blue quantum press ratio mixing, and are stirred after being mixed with packaging plastic, acrylic powder equal It is even, and be formed by curing through low temperature and pressure.So as to which quantum dot diaphragm 15 forms following structure, quantum dot diaphragm 15 includes being formed two Quantum layer between transparent film layer, the quantum layer are to include quantum dot and the packaging plastic film that uniformly hot pressing is formed after mixing, i.e., Red quantum dot, green quantum dot and blue quantum dot are mixed with quantum layer, transparent film layer is preferably acrylic film layer；Or institute It is quantum dot to state quantum dot diaphragm 15, and packaging plastic and acrylic powder uniformly mix the film formed after hot pressing, the quantum dot film Piece is evenly distributed with quantum dot, packaging plastic and acrylic powder.Preferably, red quantum dot, green quantum dot, blue quantum The composition by weight of point, acrylic powder and packaging plastic is as follows, red quantum dot 0.05-2.5 parts, green quantum dot 5-25 parts, blue Color quantum dot 1-15 parts, packaging plastic 8-50 parts, acrylic powder 0-30 parts, it is further preferred that red quantum dot 0.5-2 Part, green quantum dot 10-20 parts, blue quantum dot 4-10 parts, packaging plastic 10-35 parts, acrylic powder 0-25 parts, more enter one Step preferably red quantum dot 0.8-1.5 parts, green quantum dot 12-18 parts, blue quantum dot 5-8 parts, packaging plastic 15-30 parts, Acrylic powder 0-20 parts.Two kinds of face that quantum dot in quantum dot diaphragm 15 is selected in red, green and blue quantum dot During the quantum dot of color, the quantum dot mass component of two kinds of colors is identical with above-mentioned number.Quantum dot diaphragm 15 can into or into Roll up it is prefabricated form, in use, as needed size cut.

Alternatively, the chromaticity coordinates of red quantum dot is R1 (x=0.63 ± 0.05, y=0.33 ± 0.05), R2 (x= 0.65 ± 0.05, y=0.32 ± 0.05) or R3 (x=0.67 ± 0.05, y=0.31 ± 0.05)；The color of green quantum dot is sat It is designated as G1 (x=0.29 ± 0.04, y=0.59 ± 0.05), G2 (x=0.27 ± 0.04, y=0.65 ± 0.05) or G3 (x= 0.20 ± 0.04, y=0.71 ± 0.05)；The chromaticity coordinates of blue quantum dot be B1 (x=0.17 ± 0.02, y=0.10 ± 0.002), B2 (x=0.14 ± 0.02, y=0.08 ± 0.002) or B3 (x=0.15 ± 0.02, y=0.055 ± 0.001). Wherein, the chromaticity coordinates of red quantum dot refers to coordinate value of the red quantum dot emission spectrum corresponding color in chromatic diagram, green The chromaticity coordinates of quantum dot refers to coordinate value of the green quantum dot emission spectrum corresponding color in chromatic diagram, the color of blue quantum dot Coordinate refers to coordinate value of the blue quantum dot emission spectrum corresponding color in chromatic diagram.

Exemplarily, the blue primary light that blue-ray LED is sent, it is radiated at containing red quantum dot, green quantum dot and blueness On the quantum dot diaphragm 15 of quantum dot.Quantum dot is CdTe (cadmium telluride) quantum dot.Wherein, the indigo plant sent from blue-ray LED When primitive color light is radiated at red quantum dot, excitated red quantum dot produces feux rouges；The blue primary light irradiation sent from blue-ray LED In green quantum dot, green quantum dot is excited to produce green glow；The blue primary light irradiation sent from blue-ray LED is in blue quantum During point, excitated blue quantum dot produces blue light.The light for three kinds of colors that three kinds of color quantum dots are sent just generates by mixing White light, its color gamut value are determined by chromaticity coordinates of the light of three kinds of colors in chromatic diagram.

From the excitation source for sending different color light, from red quantum dot, green quantum dot, the difference of blue quantum dot Chromaticity coordinates.LED lamp bead 10 can be made to realize different NTSC scopes.

Combination one, selective exitation light source is blue light excitation source or purple light excited light source, selects the color of red quantum dot to sit R1 is designated as, the chromaticity coordinates of green quantum dot is G1, and the chromaticity coordinates of blue quantum dot is B1, realizes LED lamp bead 10 at least reachable To 90% NTSC scope；Combination two, selective exitation light source are blue light excitation source or purple light excited light source, and selection is red The chromaticity coordinates of quantum dot is R2, and the chromaticity coordinates of green quantum dot is G2, and the chromaticity coordinates of blue quantum dot is B2, makes LED lamp bead 10 Realization at least can reach 100% NTSC scope；Combination three, selective exitation light source are that blue light excitation source or purple light swash Light emitting source, the chromaticity coordinates for selecting red quantum dot are R3, and the chromaticity coordinates of green quantum dot is G3, and the chromaticity coordinates of blue quantum dot is B3, the realization of LED lamp bead 10 is set to can reach 110% NTSC scope.

Correspondingly, in combination one, wavelength blue light excitation source between 455nm~490nm centered on excitation source. The chromaticity coordinates of red quantum dot, green quantum dot and blue quantum dot that quantum dot diaphragm 15 includes be respectively R1 (x=0.63 ± 0.05, y=0.33 ± 0.05), G1 (x=0.29 ± 0.04, y=0.59 ± 0.05) and B1 (x=0.17 ± 0.02, y= 0.10 ± 0.002) the green quantum dot that the red quantum dot and chromaticity coordinates that are only R1 comprising chromaticity coordinates are G1 can also, be used.

Excitation source can also be centre wavelength purple light excited light source between 410nm~425nm, at this time, it may be necessary to match somebody with somebody The quantum dot diaphragm 15 comprising three kinds of color quantum dots is closed to produce white light.Wherein, the chromaticity coordinates of red quantum dot is R1, green The chromaticity coordinates of quantum dot is G1, and the chromaticity coordinates of blue quantum dot is B1.

In combination two, wavelength blue light excitation source between 465nm~475nm centered on excitation source.Quantum dot film The chromaticity coordinates of red quantum dot, green quantum dot and blue quantum dot that piece 15 includes is respectively R2 (x=0.65 ± 0.05, y =0.32 ± 0.05), G2 (x=0.27 ± 0.04, y=0.65 ± 0.05) and B2 (x=0.14 ± 0.02, y=0.08 ± 0.002) the green quantum dot that the red quantum dot and chromaticity coordinates that are only R2 comprising chromaticity coordinates are G2 can also, be used.

Excitation source can also be centre wavelength purple light excited light source between 400nm~410nm, at this time, it may be necessary to match somebody with somebody The quantum dot diaphragm 15 comprising three kinds of color quantum dots is closed to produce white light.Wherein, the chromaticity coordinates of red quantum dot is R2, green The chromaticity coordinates of quantum dot is G2, and the chromaticity coordinates of blue quantum dot is B2.

In combination three, wavelength blue light excitation source between 450nm~465nm centered on excitation source.Quantum dot film The chromaticity coordinates of red quantum dot, green quantum dot and blue quantum dot that piece 15 includes is respectively R3 (x=0.67 ± 0.05, y =0.31 ± 0.05), G3 (x=0.20 ± 0.04, y=0.71 ± 0.05) and B3 (x=0.15 ± 0.02, y=0.055 ± 0.001) the green quantum dot that the red quantum dot and chromaticity coordinates that are only R3 comprising chromaticity coordinates are G3 can also, be used.

Excitation source can also be centre wavelength purple light excited light source between 380nm~400nm, at this time, it may be necessary to match somebody with somebody The quantum dot diaphragm 15 comprising three kinds of color quantum dots is closed to produce white light.Wherein, the chromaticity coordinates of red quantum dot is R3, green The chromaticity coordinates of quantum dot is G3, and the chromaticity coordinates of blue quantum dot is B3.

It should be noted that in addition to above preferred embodiment, excitation source and quantum dot diaphragm 15 can also have a variety of Other combinations, such as wavelength blue light excitation source between 455nm~490nm centered on excitation source.Quantum dot diaphragm 15 Comprising red quantum dot, green quantum dot and blue quantum dot chromaticity coordinates be respectively R2 (x=0.65 ± 0.05, y=0.32 ± 0.05), G2 (x=0.27 ± 0.04, y=0.65 ± 0.05) and B2 (x=0.14 ± 0.02, y=0.08 ± 0.002).

The LED lamp bead 10 that the utility model embodiment provides, the excitation source with different centre wavelength scopes is coordinated Quantum dot diaphragm 15 containing specific chromaticity coordinates quantum dot, correspondingly, combination one realize LED lamp bead 10 at least to can reach 90% NTSC scope, combination two make LED lamp bead 10 realize at least can reach 100% NTSC scope, combination three Make LED lamp beads 10 realize can reach 110% NTSC scope, so may be selected by suitable combination to meet to show Show requirement of the technology to the gamut range of LED lamp bead 10.

External electrode 16 includes external positive pole 162 and external negative pole 164, through hole 116 include first through hole (figure does not regard) and Second through hole (figure does not regard), the LED chip 13 is connected, by the second through hole by the first through hole and external positive pole 162 It is electrically connected with external negative pole 164.External electrode 16 is preferably that material is the low metal of resistivity, more preferably copper, Aluminium, silver.

Referring to Fig. 3, the refractive index of air is about 1, then the refractive index of LED chip 13 is more than the refractive index of packaging plastic 14, The refractive index of packaging plastic 14 is more than the refractive index of air, so that when LED chip 13 launches light, what LED chips 13 were sent Same light is more than the refraction angle B of air inlet in the refraction angle A for entering packaging plastic 14, so as to improve going out for LED lamp bead 10 Angular, make the light irradiation area of LED lamp bead 10 bigger.Preferably, refraction of the refractive index of LED chips 13 than packaging plastic 14 Rate big 0.8-1.2, more preferably 1.0-1.2.Preferably, the refractive index of packaging plastic 14 is bigger 0.4- than the refractive index of air 0.6, more preferably 0.5-0.6.Go out optical range so as to further improve LED lamp bead.

Please continue to refer to Fig. 1, LED lamp bead 10 also includes heat sink 17, and the through hole includes third through-hole, and described heat sink 17 pass through The third through-hole that bottom plate 112 opens up is worn, heat sink 17 one end are connected in the groove of support 11, and heat sink 17 other end is exposed outside, from And the heat derives in support 11 can be reduced PCB12, LED chip 13, packaging plastic 14 and quantum dot film in the groove of support 11 The temperature of piece 15.Preferably, heat sink 17 in the support 11 and PCB12 contacts, PCB12 heat derives faster, further The cooling rate of LED chip 13 is improved, makes the working condition of LED chip 13 more preferable.

It is appreciated that heat sink 17 can also pass through the through hole 116 opened up on side plate 114.It is appreciated that heat sink 17 can have More than one, can further speed up radiating.

Referring to Fig. 4, as a kind of deformation, one heat sink 17 is connected with external positive pole 162 or external negative pole 164, so as to enter One step accelerates heat sink 17 heat conduction and radiating.It is appreciated that there is two heat sink 17, one of them and external positive pole 162 connect, its In another and external negative pole 164 connect.

Referring to Fig. 5, as a kind of deformation, LED lamp bead 10 also includes reflection layer 18, and reflection layer 18 is arranged at groove Inwall on, and between support 11 and PCB12, so as to which the illumination that the LED chip 13 on PCB12 is sent is mapped to reflection layer When 18, reflection layer 18 reflects light, and light can only project at quantum dot diaphragm 15, so as to improve the brightness of LED lamp bead 10.

Referring to Fig. 6, the utility model also provides a kind of LED light source, the LED light source employs above-mentioned LED lamp bead 10.LED light source includes LED lamp beads 10, support frame 21, diffusion sheet 22 and brightness enhancement film 23.Opened up on support frame as described above 21 including one Second groove of the second opening 211, the LED lamp beads 10 are arranged at bottom and the fixation of the second groove, the diffusion sheet 22 Being stacked successively with brightness enhancement film 23, the edge of both is all fixed on the second opening, and positioned at support frame 21 away from LED lamp bead 10 One end, diffusion sheet 22 and brightness enhancement film 23 are the closing of the second opening 211, and diffusion sheet 22 is than brightness enhancement film 23 closer to LED lamp bead 10.LED lamp bead 10 sends white light, uniform area source is formed after diffusion sheet 22, then by brightness enhancement film 23, enter illumination effect One step strengthens.

Preferably, using face of the brightness enhancement film 23 away from LED lamp bead 10 as exiting surface, light and exiting surface that LED lamp bead 10 is sent Minimum angles be that the distance between A, LED lamp beads 10 is D1, the distance of LED lamp bead 10 and the bottom edge of support frame 21 is D2, distance of the LED lamp bead 10 away from exiting surface are H, then

D1≤2HcotA,

D2≤HcotA,

Partially overlapped so as to which the light sent between LED lamp bead 10 has, make LED light source illumination effect more preferable, coincidence distance For D3, it is preferable that 0mm≤D3≤10mm.It is appreciated that the LED lamp bead 10 in LED light source can be a row or multi-row, can use In straight-down negative LED light source and side-light type LED light sources etc..

Compared with prior art, LED lamp bead of the present utility model includes support, PCB, LED chip, packaging plastic and quantum Diaphragm is put, the groove of the opening of band one is opened up on the support, the LED chip and PCB are all located in groove, the LED chip It is fixed on PCB and is electrically connected with PCB, the PCB is fixed on support, and the packaging plastic is filled in groove, and handle LED chips and PCB embeddings, the quantum dot diaphragm are located above packaging plastic, and its edge is fixed on support and the opening Closing, quantum dot diaphragm excite caused light gamut range wide, improve the colour gamut model of LED lamp bead by the light that LED chips are sent Enclose, and LED lamp bead of the present utility model is simple in construction, easily makes, and saves cost, brightness is high.

Support of the present utility model includes bottom plate and side plate, and the side plate is integrally formed in the edge of bottom plate, the bottom plate The groove is surrounded with side plate, the one end of the side plate away from bottom plate forms the opening, and in the side plate away from bottom plate The concave step of end set one, the edge of the quantum dot diaphragm are ridden upon in concave step, so that the light that LED lamp bead is sent is all To be passed through from quantum dot diaphragm, the light color for sending LED lamp bead is single, does not have veiling glare.

The one end of side plate of the present utility model away from bottom plate tilts to the direction away from LED chip, improves LED lamp bead Lighting angle.

LED lamp bead of the present utility model also includes external positive pole and external negative pole, and the external positive pole and external negative pole are all Support outer wall is fixed on, first through hole, the second through hole and third through-hole are at least offered on the support, the LED chips lead to Cross the first through hole to connect with external positive pole, be electrically connected with by second through hole and external negative pole, the LED lamp bead is also It is described heat sink in the third through-hole including heat sink, and the inside of heat sink one end connection LED support, the other end it is exposed Outside, it is and heat sink with external positive pole or external cathode contact, the heat sink temperature for reducing electrode being exceedingly fast, further speed up reduction The temperature of LED chip, LED chip is maintained at a good state, extend the life-span of LED lamp bead.

Quantum dot diaphragm of the present utility model includes the quantum layer that is formed between two transparent film layers, in the quantum layer It is even that quantum dot and packaging plastic is distributed with；Or the quantum dot diaphragm is evenly distributed with quantum dot, packaging plastic and acrylic powder, amount Son point diaphragm structure is simple, so as to easily make, reduces the cost of manufacture of LED lamp beads, the light booster dose that LED chip is sent Son point diaphragm, the light gamut range for sending LED lamp bead are wide.

LED light source of the present utility model employs above-mentioned LED lamp bead, photochromic caused by LED light source of the present utility model Domain scope is wide, and LED light source of the present utility model is simple in construction, easily makes, and saves cost, and brightness is high.

Face of the brightness enhancement film of the present utility model away from LED lamp bead is exiting surface, the light and exiting surface that the LED lamp bead is sent Minimum angles be that the distance between A, the LED lamp bead is D1, distance of the LED lamp bead away from exiting surface is H, D1≤ 2HcotA, partially overlapped so as to which the light sent between LED lamp bead has, make LED light source illumination effect more preferable.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Any modification made within the principle of utility model, equivalent substitution and improvement etc. all should include the scope of protection of the utility model Within.

Claims (10)

1. A kind of 1. LED lamp bead, it is characterised in that：The LED lamp bead includes support, PCB, LED chip, packaging plastic and quantum dot film Piece, the groove of the opening of band one is opened up on the support, the LED chip and PCB are all located in groove, and the LED chip is fixed It is electrically connected with PCB and with PCB, the PCB is fixed on support, and the packaging plastic is filled in groove, and LED chip With PCB embeddings, the quantum dot diaphragm is located above packaging plastic, and its edge is fixed on support and the closure of openings.
2. 2. LED lamp bead as claimed in claim 1, it is characterised in that：The support includes bottom plate and side plate, the side plate one The edge of bottom plate is molded over, the bottom plate and side plate surround the groove, and the one end of the side plate away from bottom plate forms described open Mouthful, and in end set one concave step of the side plate away from bottom plate, the edge of the quantum dot diaphragm rides upon spill platform On rank.
3. 3. LED lamp bead as claimed in claim 2, it is characterised in that：The step surface width of the concave step is 1-10mm.
4. 4. LED lamp bead as claimed in claim 2, it is characterised in that：The one end of the side plate away from bottom plate is to away from LED chip Direction tilt.
5. 5. LED lamp bead as claimed in claim 1, it is characterised in that：The LED lamp bead also includes external positive pole and external negative Pole, the external positive pole and external negative pole are all fixed on support outer wall, and first through hole is at least offered on the support, and second is logical Hole and third through-hole, the LED chip connected by the first through hole with external positive pole, passes through second through hole and external Negative pole is electrically connected with, and the LED lamp bead is described heat sink in third through-hole also including heat sink, and heat sink one end connection The inside of LED support, the other end is exposed outside, and heat sink and external positive pole or external cathode contact.
6. 6. LED lamp bead as claimed in claim 1, it is characterised in that：The quantum dot diaphragm includes being formed in two transparent film layers Between quantum layer, be evenly distributed with quantum dot and packaging plastic in the quantum layer；Or the quantum dot diaphragm is evenly distributed with Quantum dot, packaging plastic and acrylic powder.
7. 7. LED lamp bead as claimed in claim 1, it is characterised in that：The quantum dot diaphragm is to be prefabricated into or coiled Quantum dot diaphragm is reduced and formed.
8. A kind of 8. LED light source, it is characterised in that：The LED light source employs the LED lamp bead described in any one of 1-7.
9. 9. LED light source as claimed in claim 8, it is characterised in that：The LED light source further comprises chassis, diffusion sheet and Brightness enhancement film, one is opened up on the chassis includes the second groove of the second opening, and the LED lamp bead is arranged at the bottom of the second groove And it is fixed, the diffusion sheet and brightness enhancement film stack successively, and both edges are all fixed on the second opening, the diffusion sheet and increasing Bright film and the second closure of openings, the diffusion sheet is than brightness enhancement film closer to LED lamp bead.
10. 10. LED light source as claimed in claim 9, it is characterised in that：Face of the brightness enhancement film away from LED lamp bead is exiting surface, The light and the minimum angles of exiting surface that the LED lamp bead is sent are that the distance between A, the LED lamp bead is D1, LED lamp bead away from The distance of exiting surface is H, D1≤2HcotA.