CN108549175A - A kind of quantum dot light emitting device, quantum dot backlight module, liquid crystal display device - Google Patents
A kind of quantum dot light emitting device, quantum dot backlight module, liquid crystal display device Download PDFInfo
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- CN108549175A CN108549175A CN201810333644.0A CN201810333644A CN108549175A CN 108549175 A CN108549175 A CN 108549175A CN 201810333644 A CN201810333644 A CN 201810333644A CN 108549175 A CN108549175 A CN 108549175A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Abstract
The invention discloses a kind of quantum dot light emitting devices, including LED chip and quantum dot layer in LED chip light extraction side is set, by selecting the first quanta point material and the second quanta point material in quantum dot layer, the wavelength for controlling the second wave length exciting light and third wavelength exciting light being emitted from quantum dot layer meets certain range, so that the Efficient Coverage Rate for gamut range and the DCI P3 standard color gamut ranges that the RGB light being emitted from quantum dot layer is formed is up to 95% or more, fidelity and the accuracy for improving display device color, promote user experience.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of quantum dot light emitting device, quantum dot backlight module and
Liquid crystal display device.
Background technology
With the development of display technology field, the various products with display function occur in daily life, and liquid crystal
Display has become the main product being applied in nowadays display field.
Vision signal carries out image coding using the BT.709 colour gamuts of low colour gamut all the time, it is difficult to present rich and varied
Natural colour；Over nearly 2 years, HDR video formats gradually rise, and are acquired, are compiled using high dynamic brightness range and high colour gamut
Code, the video content made can provide more abundant close to true color representation, wherein DCI-P3 standards from signal source end
It is widely used.DCI (Digital Cinema Initiatives Digital Cinema Initiative Alliance) is by Disney, Fu Ke
This, Mei Gaomei, Paramount, Sony's film and Time Warner etc. set up in 2002, it is therefore an objective to formulated for digital movie a set of
System specifications selects JPEG2000 as the compression standard of DCI digital movies, it is specified that 4K film resolution ratio is 4096*2160,
Rather than the mpeg system that video system uses.
In the prior art, quantum dot backlight can effectively avoid in traditional liquid crystal module, and different subpixel crosstalk is asked
Topic (the saturating blue light of green pixel and saturating feux rouges, red pixel reveal the green light and blue pixel reveals the green light), improves liquid crystal module
It shows colour gamut, however mostly uses the LCD TV of quantum dot backlight at present, although colour gamut indication range is larger, simultaneously
It cannot be effectively overlapped with DCI P3 standard color gamuts, as shown in FIG. 1, FIG. 1 is the actual colors of liquid crystal display device in the prior art
The covering model of domain coverage area (broken line triangle part in Fig. 1) and DCI P3 standard color gamuts (solid triangle part in Fig. 1)
The schematic diagram enclosed, the effective covering part (shadow part in such as Fig. 1 for the colour gamut that the RGB three primary colours in existing display device are formed
Point) smaller with the overlapping range of the covering part of the standard color gamut of DCI P3, cause color fidelity relatively low with accuracy, shadow
Ring user experience.
Invention content
In view of the above problems, this application provides a kind of quantum dot light emitting device, quantum dot backlight module and liquid crystals
Showing device, to solve the problems, such as that current liquid crystal display device RGB three primary colours are low with DCI P3 gamut standards Duplication.Technical side
Case is as follows：
In a first aspect, providing a kind of quantum dot light emitting device, including LED chip, and it is arranged in the LED chip
The quantum dot layer of light emission side, which is characterized in that the LED chip generates the excitation light of first wave length, and the first wave length swashs
Encourage the incident side that light is incident on the quantum dot layer；
The quantum dot layer includes the first quanta point material and the second quanta point material, the excitation light of the first wave length
First quanta point material is excited to generate the exciting light of second wave length, excitation the second quanta point material generation third wave
Long exciting light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from
The quantum dot layer outgoing；
Wherein, the excitation light of the first wave length is blue light, and ranging from 533 nanometers~the 539 of the second wave length receives
Rice, ranging from 619 nanometers or more of the third wavelength.
Second aspect provides another quantum dot light emitting device, including LED chip, and is arranged in the LED chip
The quantum dot layer group of light emission side, which is characterized in that the LED chip generates the excitation light of first wave length, the first wave length
Excitation light is incident on the incident side of the quantum dot layer group；
The quantum dot layer group includes the first sub- quantum dot layer and the second sub- quantum dot layer, the first sub- quantum dot layer
Including the first quanta point material, the second sub- quantum dot layer includes the second quanta point material, the excitation light of the first wave length
First quanta point material is excited to generate the exciting light of second wave length, excitation the second quanta point material generation third wave
Long exciting light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from
The quantum dot layer group outgoing；
Wherein, the excitation light of the first wave length be blue light, ranging from 533nm~539 nanometer of the second wave length,
Ranging from 619 nanometers or more of the third wavelength.
The third aspect provides a kind of quantum dot backlight module, including quantum dot layer, backlight, which is characterized in that described
Backlight is used to generate the excitation light of first wave length, and what the excitation light of the first wave length was incident on the quantum dot layer enters light
Side；
The quantum dot layer includes the first quanta point material and the second quanta point material, the excitation light of the first wave length
First quanta point material is excited to generate the exciting light of second wave length, excitation the second quanta point material generation third wave
Long exciting light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from
The quantum dot layer outgoing；
Wherein, the excitation light of the first wave length be blue light, ranging from 533nm~539 nanometer of the second wave length,
Ranging from 619 nanometers or more of the third wavelength.
Fourth aspect provides another quantum dot backlight module, including quantum dot layer group, backlight, which is characterized in that
The backlight is used to generate the excitation light of first wave length, and the excitation light of the first wave length is incident on the quantum dot layer group
Incident side；
The quantum dot layer group includes the first sub- quantum dot layer and the second sub- quantum dot layer, the first sub- quantum dot layer
Including the first quanta point material, the second sub- quantum dot layer includes the second quanta point material, the excitation light of the first wave length
First quanta point material is excited to generate the exciting light of second wave length, excitation the second quanta point material generation third wave
Long exciting light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from
The quantum dot layer group outgoing；
Wherein, the excitation light of the first wave length be blue light, ranging from 533nm~539 nanometer of the second wave length,
Ranging from 619 nanometers or more of the third wavelength.
5th aspect, provides a kind of liquid crystal display device, including liquid crystal display panel, which is characterized in that further include：Backlight,
The backlight is first aspect or any quantum dot light emitting device of second aspect；
Or, backlight module, the backlight module is the third aspect or any backlight module of fourth aspect；
Wherein, the exciting light of the exciting light and the third wavelength of the excitation light of the first wave length, the second wave length
It is incident on the liquid crystal display panel.
Optionally, ranging from 445 nanometers~450 nanometers of the first wave length.
Optionally, first quanta point material is green quanta point material, and second quanta point material is amount of red
Son point material, ranging from 25 nanometers~35 that the half-wave of green quanta point material and the red quantum dot material is wide are received
Rice.
Optionally, ranging from 625 nanometers of the third wavelength and less.
6th aspect, provides a kind of liquid crystal display device, including liquid crystal display panel and backlight, which is characterized in that
The backlight includes blue-light LED chip and is arranged quantum dot layer in the blue-light LED chip light emission side,
The quantum dot layer includes green quanta point material and red quantum dot material；Wherein, the blue-light LED chip is for generating
Blue light of the wave-length coverage at 445 nanometers~450 nanometers, the blue light excitation green quanta point material generation wavelength range
In the green lights of 533nm~539 nanometer, the excitation red quantum dot material generation wavelength range at 619 nanometers~625 nanometers
Feux rouges, wide ranging from 25 nanometers~35 nanometers of the half-wave of green quanta point material and the red quantum dot material；
The blue light, the green light and the feux rouges are incident on the liquid crystal display panel.
7th aspect, provides a kind of liquid crystal display device, including liquid crystal display panel and backlight module, which is characterized in that described
Backlight module includes backlight and the quantum dot layer that is arranged below the liquid crystal display panel, and the quantum dot layer includes red
Quanta point material and green quanta point material；Wherein, the backlight is used for generation wavelength range at 445 nanometers~450 nanometers
Blue light, the blue light is incident on the incident side of the quantum dot layer, excites the green quanta point material generation wavelength range
In the green lights of 533nm~539 nanometer, the excitation red quantum dot material generation wavelength range at 619 nanometers~625 nanometers
Feux rouges, wide ranging from 25 nanometers~35 nanometers of the half-wave of green quanta point material and the red quantum dot material；
The blue light, the green light and the feux rouges are incident on the liquid crystal display panel.
The advantageous effect that technical solution provided by the invention is brought is：
Quantum dot light emitting device provided by the present application, including LED chip and quantum in LED chip light extraction side is set
Point layer, by selecting the first quanta point material and the second quanta point material in quantum dot layer, control to be emitted from quantum dot layer
The wavelength of second wave length exciting light and third wavelength exciting light meet certain range so that being emitted from quantum dot layer
The Efficient Coverage Rate of gamut range and DCI P3 standard color gamut ranges that is formed of RGB light up to 95% or more, improve aobvious
The fidelity of showing device color and accuracy promote user experience.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, required in being described below to embodiment
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the practical colour gamut and DCI P3 standard color gamut coverage areas of a kind of liquid crystal display device in the prior art
Chromaticity coordinates schematic diagram；
Fig. 2A is a kind of structural schematic diagram for quantum dot light emitting device that the embodiment of the present application one provides；
Fig. 2 B are close-up schematic views of one Fig. 2A of the embodiment of the present application at C；
Fig. 3 is launching efficiency influence diagram of the blue light to red green quanta point material of different wave length in the related technology；
Fig. 4 is the function relation figure of the spectral luminous efficiency and optical wavelength of liquid crystal display device in the related technology；
Fig. 5 A are the colour gamut and DCI P3 that a kind of quantum dot light emitting device that one example 1 of the embodiment of the present invention provides is formed
The contrast schematic diagram of standard color gamut；
Fig. 5 B are the colour gamut and DCI P3 that a kind of quantum dot light emitting device that one example 2 of the embodiment of the present invention provides is formed
The contrast schematic diagram of standard color gamut；
Fig. 5 C are the colour gamut and DCI P3 that a kind of quantum dot light emitting device that one example 3 of the embodiment of the present invention provides is formed
The contrast schematic diagram of standard color gamut；
Fig. 5 D are the colour gamut and DCI P3 that a kind of quantum dot light emitting device that one example 4 of the embodiment of the present invention provides is formed
The contrast schematic diagram of standard color gamut；
The colour gamut that a kind of quantum dot light emitting device that one example 5 of Fig. 5 E embodiment of the present invention provides is formed and DCI P3 standards
The contrast schematic diagram of colour gamut；
Fig. 5 F are the colour gamut and DCI P3 that a kind of quantum dot light emitting device that one example 6 of the embodiment of the present invention provides is formed
The contrast schematic diagram of standard color gamut；
Fig. 5 G are the colour gamut and DCI P3 that a kind of quantum dot light emitting device that one example 7 of the embodiment of the present invention provides is formed
The contrast schematic diagram of standard color gamut；
Fig. 6 is that colour filter diaphragm illustrates the curve of the transmitance of rgb pixels in liquid crystal display device in the related technology
Figure；
Fig. 7 is a kind of signal of the RGB spectrum of the 3 quantum dot light emitting device outgoing provided in the embodiment of the present invention one
Figure；
Fig. 8 is a kind of structural schematic diagram of quantum dot light emitting device provided by Embodiment 2 of the present invention；
Fig. 9 is a kind of structural schematic diagram for quantum dot backlight module that the embodiment of the present invention three provides；
Figure 10 is a kind of structural schematic diagram for quantum dot backlight module that the embodiment of the present invention four provides.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.It should be noted that examples of the embodiments are shown in the accompanying drawings,
In from beginning to end same or similar label indicate same or similar component or component with the same or similar functions.Under
Face is exemplary by reference to the embodiment that attached drawing describes, it is intended to for explaining the present invention, and should not be understood as to the present invention
Limitation.These specific embodiments can be combined with each other below, may be at certain for same or analogous concept or process
It is repeated no more in a little embodiments.
Embodiment one
With reference to figure 2A, Fig. 2 B, Fig. 2A is that a kind of structure for quantum dot light emitting device 100 that the embodiment of the present application 1 provides is shown
It is intended to, Fig. 2 B are the close-up schematic view at C in Fig. 2A, and quantum dot light emitting device 100 may include quantum dot layer 120,
LED chip 110, wherein LED chip 110 is used to generate the excitation light of first wave length, and the excitation light of the first wave length can be
Blue light, the excitation light are emitted from the light emission side of LED chip 110, are incident on the incident side 121 of quantum dot layer 120；Quantum dot layer
May include the first quanta point material 122 and the second quanta point material 123 in 120, since the excitation light of the first wave length is indigo plant
Light, and the high-energy light that quanta point material can be lower than its wave band is excited, therefore, the excitation light energy of the first wave length is measured
The first quanta point material 122 and the second quanta point material 123 in son point layer 120 absorb, and further control the first quantum dot
The grain size of material 122 and the second quanta point material 123 so that the excitation light of the first wave length excites the first quanta point material 122
The exciting light of second wave length of the generation wavelength range in 533nm~539nm (nanometer), and the excitation light of the first wave length
Excite 123 generation wavelength range of the second quanta point material in the exciting light of the third wavelength of 619nm or more, wherein this first
The exciting light of the excitation light of wavelength, the exciting light of second wave length and third wavelength is from the quantum in quantum dot light emitting device 100
Point layer 120 is emitted.
Optionally, the first quanta point material 122 is green quanta point material, and the green quanta point material of blue light excitation generates
Green light (i.e. the exciting light of second wave length), the second quanta point material 123 are red quantum dot material, the excitated red quantum of blue light
The half-wave of point material generation feux rouges (i.e. the exciting light of third wavelength), the green quanta point material and red quantum dot material is wide
Ranging from 25 nanometers~35 nanometers, by selecting the grain size of quanta point material, using the relatively narrow quanta point material of half-wave width,
So that quanta point material when being excited, can generate more dense light in relatively narrow wavelength band, stability is high, and excites and generate
Light wave spectrum it is continuously distributed, can realize the higher covering of DCI P3 standard color gamuts.
Optionally, the wave-length coverage of the excitation light of the first wave length is 445nm~450nm, on the one hand, when LED chips
110 one timing of luminous power, the blue wave band range generated that is powered is also certain, at this point, the LED chip 110 generates
Excitation light wave-length coverage in, wave-length coverage is different from related skill in the light emission rate highest of the excitation light of 445nm~450nm
It needs the luminous power for additionally improving LED chip to reach the demand of the excitation light of special wave band in art, has saved energy.
On the other hand, refering to what is shown in Fig. 3, Fig. 3 be the relevant technologies provide different wave length blue light to quanta point material
The design sketch of the influence of launching efficiency, wherein the abscissa in Fig. 3 represents the wavelength of blue light, and vertical seat table represents quanta point material
Absorption value, when the wave-length coverage of blue light (i.e. the excitation light of first wave length) be 445nm~450nm when, green quanta point material
It is higher to the absorptivity of the blue light of the wave band with red quantum dot material, especially green quanta point material, when blue light wavelength model
Enclose for 445nm~450nm when, green quanta point material is relatively high to the absorptivity of blue light, such as Fig. 3 green quanta point materials
Small wave crest at dotted line, to while realizing the high coverage rate of DCI P3 standard color gamuts, improve quanta point material pair
The light emission rate of the absorption transfer efficiency of the excitation light of the first wave length, feux rouges and green light is higher, avoids and carries in the related technology
The use concentration of high quanta point material has saved cost to reach compared with high light-emitting rate.
Optionally, third wavelength is ranging from less than or equal to 625nm, and with reference to figure 4, Fig. 4 is liquid crystal in the related technology
The spectral luminous efficiency of showing device and the function relation figure of optical wavelength, wherein abscissa is wavelength, and unit is nanometer, and ordinate is
Light efficiency needs to make the light efficiency of emergent ray to maintain a certain range to ensure that the light of outgoing has certain brightness
Interior, when red light wavelength is more than a wavelength range, light efficiency is very low, is unfavorable for display brightness, therefore, the application
The wave-length coverage of the preferred feux rouges of embodiment (i.e. the exciting light of third wavelength) is less than or equal to 625nm, i.e., in the embodiment of the present application
Red light wavelength ranges preferably from 619nm~625nm so that display device keeps higher brightness.
Coverage rate when 1 blue light wavelength of table is 445nm
Illustratively, inventor by a large amount of experiment test find, when select the wavelength of blue light for 445nm when, pass through choosing
Red quantum dot material is selected combine with the different-grain diameter of green quanta point material so that from the blue light of the outgoing of quantum dot layer 120,
Green light, the triangle that the chromaticity coordinates point of feux rouges surrounds are arranged with the Efficient Coverage Rate reference table 1 of DCI P3 standard color gamut triangles
The data gone out.
In table 1, G indicates that green light, unit nm, R indicate feux rouges, unit nm.
It can be seen from the data in Table 1 that when the wave-length coverage of green light is in 531nm~539nm, while the wavelength model of feux rouges
Enclose for 617nm or more when, the embodiment of the present application one provide quantum dot light emitting device formed colour gamut can realize DCI P3
Effective covering of 95% or more standard color gamut.
Illustratively, in conjunction with the data in table 1, and with reference to figure 5A, Fig. 5 A are a kind of amount that the embodiment of the present application one provides
Son point light-emitting device formed colour gamut and DCI P3 standard color gamuts comparison diagram, in fig. 5, color can be with coordinate U and
Coordinate V is defined.Wherein, the wavelength of blue light is 445nm, the wavelength of green light is 539nm, and red light wavelength 617nm needs
Bright, solid triangle represents DCI P3 standard color gamuts in Fig. 5 A and Fig. 5 B-5G, and broken line triangle represents the application and carries
The colour gamut that the quantum dot light emitting device of confession is formed repeats no more in subsequent figures description.It can be seen from the figure that hot light wave
When a length of 617nm, red chromaticity coordinates point has been fallen into the coverage area of DCI P3 standard color gamuts, at this point, in the application
The overlapping range of gamut range and DCI P3 standard color gamuts that is formed of red bluish-green chromaticity coordinates influenced by red chromaticity coordinates.
Illustratively, the color formed with reference to figure 5B, another quantum dot light emitting device that Fig. 5 B the embodiment of the present application one provides
The comparison diagram in domain and DCI P3 standard color gamuts, at this point, the wavelength of blue light is 445nm, the wavelength of green light is 539nm, red light wavelength
For 619nm, it can be seen from the figure that when red light wavelength is 619nm, red chromaticity coordinates point has been fallen in DCI P3 standards
The outside of colour gamut, at this point, increasing the wavelength value range of feux rouges so that red in the application when red light wavelength is more than 619nm
The overlapping range for the gamut range and DCI P3 standard color gamuts that bluish-green chromaticity coordinates is formed will not be influenced by red chromaticity coordinates,
Its effective overlapping range is 95% or more.
Illustratively, the color formed with reference to figure 5C, another quantum dot light emitting device that Fig. 5 C the embodiment of the present application one provides
The comparison diagram in domain and DCI P3 standard color gamuts, at this point, the wavelength of blue light is 445nm, the wavelength of green light is 541nm, the wave of feux rouges
A length of 619nm, it can be seen from the figure that when the wavelength of green light is 541nm, green chromaticity coordinates point is fallen just to be marked in DCI P3
On the chromaticity coordinates triangle of quasi- colour gamut, if at this point, the wavelength of green light is more than 541nm, green chromaticity coordinates can influence to mark DCI P3
The effective coverage range of quasi- colour gamut so that effective coverage range reduces.
Illustratively, when select the wavelength of blue light for 450nm when, pass through and select red quantum dot material and green quantum dot
The different-grain diameter of material combines so that the triangle that the chromaticity coordinates point of the blue and green light, feux rouges that are emitted from quantum dot layer 120 surrounds
Shape and the data listed in the Efficient Coverage Rate reference table 2 of DCI P3 standard color gamut triangles.
Coverage rate when 2 blue light wavelength of table is 450nm
In table 2, G indicates that green light, unit nm, R indicate feux rouges, unit nm.
It can be seen from the data in Table 2 that when the wave-length coverage of green light is in 533nm~541nm, while the wavelength model of feux rouges
Enclose for 619nm or more when, the embodiment of the present application one provide quantum dot light emitting device formed colour gamut can realize DCI P3
Effective covering of 95% or more standard color gamut.
Illustratively, in conjunction with data in table 2, and with reference to figure 5D, Fig. 5 D are another amount that the embodiment of the present application one provides
The comparison diagram for the colour gamut and DCI P3 standard color gamuts that son point light-emitting device is formed, at this point, the wavelength of blue light is 450nm, green light
Wavelength is 539nm, red light wavelength 617nm, it can be seen from the figure that when red light wavelength is 617nm, red chromaticity coordinates
Point has been fallen into the coverage area of DCI P3 standard color gamuts, at this point, the colour gamut model that the red bluish-green chromaticity coordinates in the application is formed
Enclosing is influenced with the overlapping range of DCI P3 standard color gamuts by red chromaticity coordinates.
Illustratively, the color formed with reference to figure 5E, another quantum dot light emitting device that Fig. 5 E the embodiment of the present application one provides
The comparison diagram in domain and DCI P3 standard color gamuts, at this point, the wavelength of blue light is 450nm, the wavelength of green light is 539nm, red light wavelength
For 619nm, it can be seen from the figure that when red light wavelength is 619nm, red chromaticity coordinates point has been fallen in DCI P3 standards
The outside of colour gamut, at this point, increasing red light wavelength, red chromaticity coordinates influences not the effective coverage range of DCI P3 standard color gamuts
Greatly.
Illustratively, the color formed with reference to figure 5F, another quantum dot light emitting device that Fig. 5 F the embodiment of the present application one provides
The comparison diagram in domain and DCI P3 standard color gamuts, at this point, the wavelength of blue light is 450nm, the wavelength of green light is 531nm, the wave of feux rouges
A length of 619nm, it can be seen from the figure that when the wavelength of green light is 531nm, due to color filter in liquid crystal display device at this time
For piece (not shown in Fig. 2A) to the transmittance curve of rgb pixels with reference to figure 6, Fig. 6 shows colour filter in liquid crystal display device
Diaphragm is to the curve synoptic diagram of the transmitance of rgb pixels, and in Fig. 6, abscissa is wavelength, unit nm, and ordinate is
Cross rate.At this point, due to green light wavelength be 531nm, and transmitance of the color blocking of blue light pixel when green light is in the wave band compared with
It is high so that the green light of quantum dot light emitting device outgoing provided by the present application green light at the color blocking of blue light pixel is more,
Causing the variation of blue chromaticity coordinates so that blue chromaticity coordinates moves on the position of blue chromaticity coordinates to upper left side in Fig. 5 E, from
And influence the colour gamut of red green light formation and having for DCI P3 standard color gamuts that quantum dot light emitting device provided by the present application generates
Coverage rate is imitated, therefore, when the wavelength of blue light is 450nm, and the wavelength of feux rouges is 619nm or more, the wavelength of green light should be greater than
531nm。
Illustratively, the color formed with reference to figure 5G, another quantum dot light emitting device that Fig. 5 G the embodiment of the present application one provides
The comparison diagram in domain and DCI P3 standard color gamuts, at this point, the wavelength of blue light is 450nm, the wavelength of green light is 533nm, red light wavelength
For 619nm, it can be seen from the figure that when green wavelength is 533nm, green chromaticity coordinates point has been fallen in DCI P3 standards
The outside of colour gamut, at this point, blue chromaticity coordinates point is fallen at the triangle position of DCI P3 standard color gamuts, therefore, green wavelength is answered
Meet 533nm or more, the coverage area of colour gamut and the DCI P3 standard color gamuts that RGB chromaticity coordinates is formed at this time 95% with
On.
In conclusion the grain size of red quantum dot material meet generation wavelength range 619nm~625nm feux rouges, green
The grain size of color quanta point material meets generation wavelength range in the green light of 533~539nm, what the embodiment of the present application one provided
Quantum dot light emitting device meets the colour gamut to be formed with the limited covering rate of DCI P3 standard color gamuts 95% or more, at this point, from amount
As shown in fig. 7, abscissa is wavelength in Fig. 7, unit is the schematic diagram for the red green spectrum being emitted in son point light-emitting device 100
Nm, ordinate are relative light intensity.
It is peak wavelength it should be noted that if the wavelength being previously mentioned in the application is without specified otherwise.
It is worth mentioning that the structure for the quantum dot layer mentioned in the embodiment of the present application one can be Fig. 2A, 2B and
The quantum dot layer of the individualism and other optical modules shown in attached drawing 8, Fig. 9, Figure 10 in subsequent embodiment, form
Can apply the quantum dot film layer invested on other optical diaphragms, as long as meeting the design of the present invention, the form of quantum dot layer
It is not limited by attached drawing shown in the embodiment of the present application.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include：
Quantum dot light emitting device provided by the present application, including LED chip and quantum in LED chip light extraction side is set
Point layer, by selecting the first quanta point material and the second quanta point material in quantum dot layer, control to be emitted from quantum dot layer
The wavelength of second wave length exciting light and third wavelength exciting light meet certain range so that being emitted from quantum dot layer
The Efficient Coverage Rate of gamut range and DCI P3 standard color gamut ranges that is formed of RGB light up to 95% or more, improve aobvious
The fidelity of showing device color and accuracy promote user experience.
Embodiment two
The embodiment of the present application two also provides another quantum dot light emitting device 200, and structural schematic diagram can be such as Fig. 8 institutes
Show, including LED chip 210 and quantum dot layer group 220 in 210 light emission side of LED chip is set, LED chip 210 generates the
The excitation light of one wavelength, the excitation light of the first wave length are incident on the incident side of quantum dot layer group 220；Quantum dot layer group 220
Including the first sub- quantum dot layer 221 and the second sub- quantum dot layer 222, the first sub- quantum dot layer 221 includes the first quantum dot material
Material, the second sub- quantum dot layer 222 include the second quanta point material, and the excitation light of the first wave length excites first quantum
Point material generates the exciting light of second wave length, excitation second quanta point material generates the exciting light of third wavelength, and described the
The exciting light of the exciting light and the third wavelength of the excitation light of one wavelength, the second wave length goes out from quantum dot layer group 220
It penetrates；Wherein, the excitation light of the first wave length is blue light, and ranging from 533nm~539 nanometer of the second wave length are described
Ranging from 619 nanometers or more of third wavelength.
Optionally, the position of the first sub- quantum dot layer 221 and the second sub- quantum dot layer 222 can be the first sub- quantum dot
Layer 221 is located at 222 top of the second sub- quantum dot layer；Alternatively, the first sub- quantum dot layer 221 is located under the second sub- quantum dot layer 222
Side, the preferably second sub- quantum dot layer 222 of the embodiment of the present application two is located at the lower section of the first sub- quantum dot layer 221, is compared to the
When one sub- quantum dot layer 221 is located at the second sub- 222 lower section of quantum dot layer, it can reduce by the first quanta point material and be stimulated generation
The secondary excitation of the second quanta point material of excitation light pair of second wave length is converted, and the utilization rate and light extraction of quanta point material are improved
Efficiency.
The other structures for the quantum dot light emitting device 200 that the embodiment of the present application two provides and function and the embodiment of the present application
The structure of one quantum dot light emitting device 100 provided is similar with function, and the advantageous effects that can be generated are also identical, herein
It does not repeat.
Embodiment three
The embodiment of the present application three also provides a kind of quantum dot backlight module 300, structural schematic diagram can as shown in Fig. 9,
Including quantum dot layer 320, backlight 310, wherein backlight 310 is used to generate the excitation light of first wave length, the first wave length
Excitation light be incident on the incident side of quantum dot layer 320；Quantum dot layer 320 includes the first quanta point material and the second quantum dot
The excitation light of material, the first wave length excites first quanta point material to generate described in the exciting light of second wave length, excitation
Second quanta point material generate third wavelength exciting light, the excitation light of the first wave length, the second wave length exciting light
It is emitted from quantum dot layer 320 with the exciting light of the third wavelength；Wherein, the excitation light of the first wave length is blue light, described
Ranging from 533nm~539 nanometer of second wave length, ranging from 619 nanometers or more of the third wavelength.
It should be noted that three Fig. 9 of the embodiment of the present application illustrates only a kind of quantum dot backlight mould provided herein
The structural schematic diagram of group 300, however the backlight module that the embodiment of the present application three provides can be not only that side as shown in Figure 9 enters
Formula backlight module can also be applied to other backlight modules for entering light mode, as long as in present invention design, it is any
Improvement, equivalent replacement etc. are all in the protection domain of the application.
The other structures that a kind of quantum dot backlight module 300 that the embodiment of the present application three is provided includes are this with function
Known to field technology personnel, and the possessed of a kind of quantum dot backlight module 300 that the embodiment of the present application three is provided has
Beneficial technique effect is identical as the technique effect of quantum dot light emitting device 100 provided in embodiment one, is not repeated herein.
Example IV
The embodiment of the present application four also provides another quantum dot backlight module 400, and structural schematic diagram can be such as Figure 10 institutes
Show, including quantum dot layer group 420 and backlight 410, wherein backlight 410 is used to generate the excitation light of first wave length, institute
The excitation light for stating first wave length is incident on the incident side of quantum dot layer group 420；Quantum dot layer group 420 includes the first sub- quantum dot
Layer 421 and the second sub- quantum dot layer 422, the first sub- quantum dot layer 421 include the first quanta point material, the second sub- quantum dot layer
422 include the second quanta point material, and the excitation light of the first wave length excites first quanta point material to generate second wave length
Exciting light, excitation second quanta point material generate the exciting light of third wavelength, the excitation light of the first wave length, institute
The exciting light of the exciting light and the third wavelength of stating second wave length is emitted from quantum dot layer group 420；Wherein, the first wave
Long excitation light be blue light, ranging from 533nm~539 nanometer of the second wave length, ranging from the 619 of the third wavelength
Nanometer or more.
Optionally, the position of the first sub- quantum dot layer 421 and the second sub- quantum dot layer 422 can be the first sub- quantum dot
Layer 421 is located at 422 top of the second sub- quantum dot layer；Alternatively, the first sub- quantum dot layer 421 is located under the second sub- quantum dot layer 422
Side, the preferably second sub- quantum dot layer 422 of the embodiment of the present application two is located at the lower section of the first sub- quantum dot layer 421, is compared to the
When one sub- quantum dot layer 421 is located at the second sub- 422 lower section of quantum dot layer, it can reduce by the first quanta point material and be stimulated generation
The secondary excitation of the second quanta point material of excitation light pair of second wave length is converted, and the utilization rate and light extraction of quanta point material are improved
Efficiency.
It should be noted that Figure 10 illustrates only a kind of quantum dot back of the body provided herein in the embodiment of the present application four
The structural schematic diagram of optical mode group 400, however the backlight module that the embodiment of the present application four provides can be not only as shown in Figure 10
Side entrance back module can also be applied to other backlight modules for entering light mode, as long as in present invention design,
Any improvement, equivalent replacement etc. are all in the protection domain of the application.
The other structures that a kind of quantum dot backlight module 400 that the embodiment of the present application four is provided includes are this with function
Known to field technology personnel, and the possessed of a kind of quantum dot backlight module 400 that the embodiment of the present application four is provided has
Beneficial technique effect is identical as the technique effect of quantum dot light emitting device 100 provided in embodiment one, is not repeated herein.
Embodiment five
The embodiment of the present application five also provides a kind of liquid crystal display device, including liquid crystal display panel (not shown in figures), and
Embodiment one or any quantum dot light emitting device 100 (200) of embodiment two；Alternatively, including embodiment three or embodiment
Four any quantum dot backlight modules 300 (400), a kind of liquid crystal display device institute that the embodiment of the present application five is provided
Including other structures be well known to those skilled in the art with function, in the advantageous effects having and embodiment one
Advantageous effects it is identical, be not repeated herein.
The above specific implementation mode has carried out further specifically the purpose of the present invention, technical solution and advantageous effect
It is bright, it should be understood that these are only the specific implementation mode of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection domain.
Claims (10)
1. a kind of quantum dot light emitting device, including LED chip, and the quantum dot layer in the LED chip light extraction side is set,
It is characterized in that,
The LED chip generates the excitation light of first wave length, and the excitation light of the first wave length is incident on the quantum dot layer
Incident side；
The quantum dot layer includes the first quanta point material and the second quanta point material, and the excitation light of the first wave length excites institute
State the excitation that the first quanta point material generates the exciting light of second wave length, excitation second quanta point material generates third wavelength
Light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from the quantum
Point layer outgoing；
Wherein, the excitation light of the first wave length is blue light, ranging from 533 nanometers ~ 539 nanometers of the second wave length, described
Ranging from 619 nanometers or more of third wavelength.
2. a kind of quantum dot light emitting device, including LED chip, and the quantum dot layer group in the LED chip light extraction side is set,
It is characterized in that,
The LED chip generates the excitation light of first wave length, and the excitation light of the first wave length is incident on the quantum dot layer group
Incident side；
The quantum dot layer group includes the first sub- quantum dot layer and the second sub- quantum dot layer, and the first sub- quantum dot layer includes the
One quanta point material, the second sub- quantum dot layer include the second quanta point material, and the excitation light of the first wave length excites institute
State the excitation that the first quanta point material generates the exciting light of second wave length, excitation second quanta point material generates third wavelength
Light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from the quantum
Point layer group outgoing；
Wherein, the excitation light of the first wave length is blue light, ranging from 533nm ~ 539 nanometer of the second wave length, described the
Ranging from 619 nanometers or more of three wavelength.
3. a kind of quantum dot backlight module, including quantum dot layer, backlight, which is characterized in that
The backlight is used to generate the excitation light of first wave length, and the excitation light of the first wave length is incident on the quantum dot layer
Incident side；
The quantum dot layer includes the first quanta point material and the second quanta point material, and the excitation light of the first wave length excites institute
State the excitation that the first quanta point material generates the exciting light of second wave length, excitation second quanta point material generates third wavelength
Light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from the quantum
Point layer outgoing；
Wherein, the excitation light of the first wave length is blue light, ranging from 533nm ~ 539 nanometer of the second wave length, described the
Ranging from 619 nanometers or more of three wavelength.
4. a kind of quantum dot backlight module, including quantum dot layer group, backlight, which is characterized in that
The backlight is used to generate the excitation light of first wave length, and the excitation light of the first wave length is incident on the quantum dot layer
The incident side of group；
The quantum dot layer group includes the first sub- quantum dot layer and the second sub- quantum dot layer, and the first sub- quantum dot layer includes the
One quanta point material, the second sub- quantum dot layer include the second quanta point material, and the excitation light of the first wave length excites institute
State the excitation that the first quanta point material generates the exciting light of second wave length, excitation second quanta point material generates third wavelength
Light, the excitation light of the first wave length, the second wave length exciting light and the third wavelength exciting light from the quantum
Point layer group outgoing；
Wherein, the excitation light of the first wave length is blue light, ranging from 533nm ~ 539 nanometer of the second wave length, described the
Ranging from 619 nanometers or more of three wavelength.
5. a kind of liquid crystal display device, including liquid crystal display panel, which is characterized in that further include：Backlight, the backlight are right
It is required that any quantum dot light emitting devices of 1-2；
Or, backlight module, the backlight module is any backlight modules of claim 3-4；
Wherein, the exciting light of the exciting light and the third wavelength of the excitation light of the first wave length, the second wave length is incident
To the liquid crystal display panel.
6. liquid crystal display device according to claim 5, which is characterized in that ranging from 445 nanometers of the first wave length ~
450 nanometers.
7. liquid crystal display device according to claim 5, which is characterized in that first quanta point material is green quantum
Point material, second quanta point material are red quantum dot material, the green quanta point material and the red quantum dot
Wide ranging from 25 nanometers ~ 35 nanometers of the half-wave of material.
8. liquid crystal display device according to claim 5, which is characterized in that ranging from 625 nanometers of the third wavelength
And it is following.
9. a kind of liquid crystal display device, including liquid crystal display panel and backlight, which is characterized in that
The backlight includes blue-light LED chip and is arranged quantum dot layer in the blue-light LED chip light emission side, the amount
Son point layer includes green quanta point material and red quantum dot material；
Wherein, the blue-light LED chip is used for blue light of the generation wavelength range at 445 nanometers ~ 450 nanometers, the blue light excitation
The green quanta point material generation wavelength range is in the green light of 533nm ~ 539 nanometer, the excitation red quantum dot material production
Feux rouges of the raw wave-length coverage at 619 nanometers ~ 625 nanometers, the green quanta point material and the half of the red quantum dot material
Wide ranging from 25 nanometers ~ 35 nanometers of wave；
The blue light, the green light and the feux rouges are incident on the liquid crystal display panel.
10. a kind of liquid crystal display device, including liquid crystal display panel and backlight module, which is characterized in that
The backlight module includes backlight and the quantum dot layer that is arranged below the liquid crystal display panel, the quantum dot layer packet
Include red quantum dot material and green quanta point material；
Wherein, the backlight is used for blue light of the generation wavelength range at 445 nanometers ~ 450 nanometers, and the blue light is incident on described
The incident side of quantum dot layer excites green light of the green quanta point material generation wavelength range in 533nm ~ 539 nanometer, excitation
Feux rouges of the red quantum dot material generation wavelength range at 619 nanometers ~ 625 nanometers, the green quanta point material and institute
State wide ranging from 25 nanometers ~ 35 nanometers of the half-wave of red quantum dot material；
The blue light, the green light and the feux rouges are incident on the liquid crystal display panel.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20220252932A1 (en) * | 2021-02-08 | 2022-08-11 | Lg Electronics Inc. | Display device |
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