CN108870201A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN108870201A CN108870201A CN201810679520.8A CN201810679520A CN108870201A CN 108870201 A CN108870201 A CN 108870201A CN 201810679520 A CN201810679520 A CN 201810679520A CN 108870201 A CN108870201 A CN 108870201A
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- Prior art keywords
- light
- backlight module
- emitting element
- nature forest
- rendering index
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
- F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Led Device Packages (AREA)
Abstract
The present invention provides backlight module, including backboard, accommodating space is formed in backboard, accommodating space content is equipped with dimming components, and the near-nature forest light for issuing LED light source is imported and projected, and the relative spectral power of red light is greater than 0.60 in near-nature forest light；The relative spectral power of cyan light is greater than 0.30；The relative spectral power of blue light is less than 0.75；The colour rendering index Ra of near-nature forest light is greater than 90, and colour rendering index R9 is greater than 90, and colour rendering index R12 is greater than 80.Backlight module provided by the invention has complete spectrum using the LED light source that can issue near-nature forest light, form near-nature forest light, wherein colour rendering index Ra is greater than 90, colour rendering index R9 is greater than 90, and colour rendering index R12 is greater than 80, so that the color of display area is truer.Meanwhile the reduction of blue light is conducive to protect eyesight, avoids using asthenopia；In addition, improving feux rouges, the Health Category of the electronic products such as mobile phone is improved.
Description
Technical field
The invention belongs to field of display technology, are to be related to a kind of backlight module more specifically.
Background technique
Backlight module is used in display screen provide backlight, such as in computer, IPad electronic product.Existing backlight mould
Group has continuous promotion in terms of brightness and uniformity, but is still promoted relatively slowly in terms of the color of image, is mainly reflected in pattern colour
Color authenticity has to be hoisted.Existing backlight module generallys use high color temperature backlight, can be promoted to a certain extent
Contrast, but the realistic colour of any scene still cannot be preferably embodied, certain part scenes are difficult to really present.
Summary of the invention
The purpose of the present invention is to provide a kind of backlight modules, it is intended to which the colour rendering for promoting backlight module prevents pattern colour
Coloured silk distortion.
To achieve the above object, the technical solution adopted by the present invention is that：A kind of backlight module is provided, including：Backboard, it is described
Accommodating space is formed in backboard, the accommodating space content is equipped with dimming components, and the dimming components are for issuing LED light source
Near-nature forest light import and project, in the near-nature forest light relative spectral power of red light be greater than 0.60；The near-nature forest light
The relative spectral power of middle cyan light is greater than 0.30；The relative spectral power of blue light is less than 0.75 in the near-nature forest light；Institute
The colour rendering index Ra for stating near-nature forest light is greater than 90, and the colour rendering index R9 is greater than 90, and the colour rendering index R12 is greater than 80.
Further, the dimming components are light guide plate, and the LED light source is set to the side of the light guide plate.
Further, the dimming components are equal tabula rasa, and the LED light source is set to the back side of the equal tabula rasa.
Further, the backlight module further includes that the light that the dimming components leak out further is reflected back light modulation group
Reflector plate inside part.
Further, the periphery of the backboard bends with respect to its bottom and engages with the front frame for installing display module,
The position that the backboard engages with the front frame is equipped with the buckle and card slot mutually fastened.
Further, the LED light source include substrate, at least one set of luminescence component for being set on substrate, and with institute
State the circuit of luminescence component electrical connection；Every group of luminescence component includes white light emitting element and red light-emitting element, the white light hair
Optical element includes blue chip and the fluorescent film for covering the blue chip, and the red light-emitting element includes red light chips；Institute
The white light for stating white light emitting element transmitting is mixed with the feux rouges that the red light-emitting element emits, and the feux rouges is described for compensating
The red light portion that white light is lacked relative to natural spectrum forms the near-nature forest light.
Further, the colour rendering index Ra is greater than 95, and the colour rendering index R9 is greater than 95.
Further, in the near-nature forest light relative spectral power of purple light less than 0.10.
Further, the white light emitting element and the red light-emitting element drive by the way that identical driving current is unified
It is dynamic.
Further, the driving current is 20-100mA, and the power of the LED light source is 0.3-1.0W.
The beneficial effect of backlight module provided by the invention is：Compared with prior art, backlight module of the invention
Using the LED light source that can issue near-nature forest light, there is complete spectrum, form near-nature forest light, wherein colour rendering index Ra is big
In 90, colour rendering index R9 is greater than 90, and colour rendering index R12 is greater than 80, so that the color of display area is truer.Meanwhile blue light
Reduction be conducive to protect eyesight, avoid using asthenopia；In addition, improving feux rouges, the health of the electronic products such as mobile phone is improved
Grade.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the schematic cross-sectional view for the backlight module that an embodiment of the present invention provides；
Fig. 2 is the configuration schematic diagram for the backlight module that an embodiment of the present invention provides；
Fig. 3 is the schematic cross-sectional view for the backlight module that another embodiment of the present invention provides；
Fig. 4 is the present invention looks up structural representation for the backlight module that another embodiment of the present invention provides；
Fig. 5 is the schematic perspective view of LED light source provided in an embodiment of the present invention；
Fig. 6 is the cross-sectional view of LED light source provided in an embodiment of the present invention；
Fig. 7 is the spectral schematic of near-nature forest light provided in an embodiment of the present invention；
Fig. 8 is the spectrum test report figure of quasi- natural light shown in Fig. 7；
Fig. 9 is the spectrum comparison diagram of near-nature forest radiant provided in an embodiment of the present invention and natural light；
Figure 10 is the spectrum comparison diagram of existing near-nature forest radiant and natural light；
Figure 11 is the spectrogram of white light emitting element provided in an embodiment of the present invention；
Figure 12 is the white-light spectrum figure provided in an embodiment of the present invention using 452.5-455nm blue chip；
Figure 13 is a kind of spectrogram of near-nature forest radiant in the prior art.
Wherein, each appended drawing reference in figure：
2-LED light source；3- backboard；4- front frame；5- optical diaphragm；6- reflector plate；7-PCB plate；8- center；90- accommodating is empty
Between；11- light guide plate；110- light conducting plate body；111- reflective surface；112- light-emitting surface；113- incidence surface；114- groove；12- light
Plate；20- substrate；21 luminescence components；22- circuit；210- white light emitting element；211- red light-emitting element；201- reflector；
2011- reflecting surface；The first pin of 221-；222- second pin.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that when component is referred to as " being fixed on " or " being set to " another component, it can directly or
It connects and is located on another component.When a component referred to as " is connected to " another component, it be can be directly or indirectly
It is connected on another component.Term " on ", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top",
The orientation or position of the instructions such as "bottom", "inner", "outside" are orientation based on the figure or position, are merely for convenience of describing,
It should not be understood as the limitation to the technical program.Term " first ", " second " are used merely to facilitate description purpose, and should not be understood as
Indication or suggestion relative importance or the quantity for implicitly indicating technical characteristic.The meaning of " plurality " is two or more,
Unless otherwise specifically defined.
The explanation of technical term：
1. relative spectral power：
A kind of spectrum that light source is emitted is frequently not single wavelength, but by the mixed radiation of many different wave lengths institute
Composition.The spectral radiance of light source is known as the spectral power distribution of light source by wavelength order and the distribution of each Wavelength strength.
Parameter for characterizing spectral power size is divided into absolute spectral power and relative spectral power.And then absolute spectrum
Power distribution curve：Refer to curve made by the various wavelength light energy absolute values with spectral radiance；
Relative spectral power distributions curve：The energy of the various wavelength of radiation of light source spectrum is compared to each other by finger, is made
The spectral power distribution for changing radiant power only within the limits prescribed.The maximum phase of radiant power
It is 1 to spectral power, the relative spectral power of other wavelength is respectively less than 1.
2. color ratio：
Any white light can be mixed to get by Red Green Blue with corresponding proportion, in order to indicate that R, G, B three primary colors are each
Relative scale in comfortable white light total amount introduces chromaticity coordinate r, g, b, wherein r=R/ (R+G+B), g=G/ (R+G+B), b=
B/ (R+G+B), r+g+b=1, r, g, b are respectively red light color ratio, green light color ratio, blue light color ratio.
Also referring to Fig. 1 and Fig. 3, now backlight module provided in an embodiment of the present invention is illustrated.The backlight mould
Group, including backboard 3, backboard 3 is interior to form accommodating space 90, and 90 content of accommodating space is equipped with dimming components, which is used for
The near-nature forest light that LED light source 2 issues is imported and projected, above-mentioned near-nature forest light can make light by the reconciliation of dimming components
Line uniformly projects.The relative spectral power of red light is greater than 0.60 in near-nature forest light；The relative spectral of cyan light in near-nature forest light
Power is greater than 0.30；The relative spectral power of blue light is less than 0.75 in near-nature forest light；The colour rendering index Ra of near-nature forest light is greater than
90；Colour rendering index R9 is greater than 90, and colour rendering index R12 is greater than 80.
Such as Fig. 7 to Fig. 9, the spectrogram and spectrum test data of near-nature forest light are respectively illustrated, can be seen that by the figure
The spectrum meets the spectrum parameter of above-mentioned feux rouges, green light and blue light, in addition, the ratio of blue light is lowered, close to natural light
Health is also helped simultaneously.With reference to Figure 10, existing near-nature forest light spectrum and natural light spectrum still gap are larger, blue light ingredient
It is higher while clearly disadvantageous in red light portion and the appearance of green light part.This light source is for will lead to display in backlight module
The problems such as color distortion in region.
LED light source 2 is in the case where spectrum and optical parameter are all satisfied requirement, the relative spectral power of 640-700nm feux rouges
It is obviously improved.Such as Fig. 7, the feux rouges relative spectral power that wavelength is 680~690nm is greater than 0.80；Wavelength be 622~
The feux rouges relative spectral power of 680nm is greater than 0.60.Such as Figure 10 and Figure 13, traditional near-nature forest radiant can be after 640nm
There is the trend being decreased obviously in wave band.640-700nm feux rouges has excellent health care, physical therapy, beautification function.
Backlight module provided in an embodiment of the present invention, compared with prior art, the backlight module using can issue it is close from
The LED light source of right light, has complete spectrum, forms near-nature forest light, wherein colour rendering index Ra is greater than 90, colour rendering index R9
Greater than 90, colour rendering index R12 is greater than 80, so that the color of display area is truer.Meanwhile the reduction of blue light is conducive to protect
Eyesight avoids using asthenopia；In addition, improving feux rouges, the Health Category of the electronic products such as mobile phone is improved.
Further, also referring to Fig. 1 and Fig. 2, one kind as backlight module provided in an embodiment of the present invention is specific
Embodiment, when dimming components are light guide plate 11, above-mentioned LED light source 2 is set to the side of light guide plate 11, wherein the LED
Light source 2 is set to the side, two sides or more sides of light guide plate 11, is shone with forming side entering type.Specifically, which further includes
For installing the pcb board 7 of LED light source 2, for being electrically connected with the formation of extraneous power supply to drive LED light source 2 to shine.The LED light source
2 have multiple, and multiple LED light sources 2 are distributed on pcb board 7.
In the present embodiment, referring particularly to Fig. 2, light guide plate 11 includes light conducting plate body 110, and light conducting plate body 110 includes
The incidence surface 113 of near-nature forest light incidence, the corresponding incidence surface 113 of LED light source 2 are arranged.Light conducting plate body 110 is equipped with and is oppositely arranged
Reflective surface 111 and light-emitting surface 112, reflective surface 111 is equipped with several and carries out irreflexive site for nearly natural light.Through
The near-nature forest light for crossing light incidence section incidence is directed into light conducting plate body 110, reflexes to out light using the site on reflective surface 111
It projects in face 112.Incidence surface 113 is equipped with the groove 114 of several evacuation LED light sources 2, and groove 114 and LED light source 2 one are a pair of
It answers, so that LED light source 2 will not be damaged when light guide plate 11 expands with heat and contract with cold.
Light for issuing multiple LED light sources 2 is additionally provided on light guide plate 11 to be polymerize and spread and be emitted
Optical diaphragm 5.
Further, the another kind specific implementation refering to Fig. 3 and Fig. 4, as backlight module provided in an embodiment of the present invention
Mode, when dimming components are equal tabula rasa 12, which is set to the back side of equal tabula rasa 12.The setting of several LED light sources 2
It is polymerize on pcb board 7, being additionally provided with the light for issuing multiple LED light sources 2 on equal tabula rasa 12 and spread and be emitted
Optical diaphragm 5, the position that each LED light source 2 is corresponded on optical diaphragm 5 accordingly offers multiple holes.Due to downward back
Optical mode group is easy to appear hot spot, in this case, light is spread and is polymerize according to the optical diaphragm 5 for being located at 2 top of LED light source
Principle, will there is the position at brighter hot spot to carry out punching design, light allowed directly to transmit from the hole of optical diaphragm 5
Come, so that the principle that this some light spreads light and polymerize without optical diaphragm 5, to reach the effect for eliminating hot spot
Fruit.
Further, Fig. 1 and Fig. 3 is please referred to, a kind of specific implementation as backlight module provided in an embodiment of the present invention
Mode, the backlight module further include the reflector plate 6 being further reflected back the light that dimming components leak out inside dimming components, should
The back side setting of the corresponding dimming components of reflector plate 6, is arranged reflector plate 6 to avoid light leakage.
The backlight module further includes the front frame 4 engaged with backboard 3, the periphery of backboard 3 bent relative to its bottom and with
The front frame 4 that display module is installed at family engages, and the position that backboard 3 engages with front frame 4 is equipped with the buckle and card slot mutually fastened.
The backlight module further includes the center 8 for fixing optical diaphragm 5.
In addition, the backlight module further includes that other are currently used for adjusting light or other structures for fixing, this hair
Bright embodiment is repeated one by one in this portion.
Further, refering to Fig. 5 and Fig. 6, as a kind of specific embodiment of fluorescent tube provided in an embodiment of the present invention,
LED light source 2 includes substrate 20, at least one set of luminescence component 21 being set on substrate 20, and is electrically connected with luminescence component 21
Circuit 22；Every group of luminescence component 21 includes white light emitting element 210 and red light-emitting element 211, and white light emitting element 210 wraps
It includes blue chip and covers the fluorescent film of blue chip, red light-emitting element 211 includes red light chips；White light emitting element 210
The white light of transmitting is mixed with the feux rouges that red light-emitting element 211 emits, and feux rouges is lacked for compensating white light relative to natural spectrum
Red light portion, formed near-nature forest light.
Specifically, as described above, the basic composed structure of LED light source 2 is substrate 20, luminescence component 21 is arranged in substrate 20
On, the quantity of luminescence component 21 is one group, two or more groups, and the structure and function of each luminescence component 21 is all consistent.This
Embodiment is preferably one group.Each group of luminescence component 21 all includes white light emitting element 210 and red light-emitting element 211, that is,
LED light source 2, which issues near-nature forest light, to be realized by the mixing of white light and feux rouges.Wherein, feux rouges for compensate white light relative to
The part of natural spectrum missing, and then form the near-nature forest light close to natural light.With reference to Fig. 9, the white light emitting element 210 packet
It includes blue chip and covers the fluorescent film of blue chip, red light-emitting element 211 includes at least red light chips, will by fluorescent film
Blue chip issue monochromatic light carry out wavelength convert, generate other coloured light, form white light after a variety of Colored light mixings, the white light and
Near-nature forest light is formed after feux rouges mixing.The near-nature forest light has following spectrum parameter, and the relative spectral power of red light is greater than
0.60；The relative spectral power of cyan light is greater than 0.30；The relative spectral power of blue light is less than 0.75.Every group of luminescence component 21
Near-nature forest light can be issued, therefore in the case where LED light source 2 contains multi-group light-emitting component 21, can equally issued close
Natural light.
The wave-length coverage of various coloured light is as follows in visible light：Red light (622~700nm), orange-colored light (597~622nm),
Sodium yellow (577~597nm), green light (492~577nm), cyan light (475~492nm), blue light (435~475nm),
Purple light (380~435nm).
White light emitting element 210 and red light-emitting element 211 can be using the miniature light-emitting component for meeting performance requirement, light
The miniature lamp bead in source generally one, can multiple lamp beads be arranged on 22 plate of circuit of various lamps and lanterns with arbitrary form, due to its volume
It is small and exquisite, it may be disposed at any position of 22 plate of circuit, flexible in application, lamps and lanterns Integral luminous is uniform, good illumination effect.Suitable for body
In the lesser electronic product of product.
In the present embodiment, the wave-length coverage of the blue chip is 450-480nm；The wave-length coverage of red light chips is 640-
700nm, the central wavelength of red light chips are preferably 690 ± 5nm.Preferably, the wave-length coverage of blue chip is 457.5-
480nm, at least 457.5-460nm.By breaking through orthodox practice (using 450-455nm blue chip), selection
On the other hand the blue chip of 457.5nm-480nm combines fluorescent film, so that the relative spectral power of green light is obviously mentioned
It rises.Simultaneously because the promotion of green light, while aobvious finger R12 is promoted, so that the colour rendering of backlight module is more preferable.Such as Figure 12, pass
The green light relative spectral power united in near-nature forest light is lower than 0.3, the green light relative spectral power such as Fig. 7 and Fig. 8, in the present embodiment
Reach 0.4 or more.
It show the spectrum of white light emitting element 210 in the present embodiment with further reference to Figure 11 and Figure 12, Figure 11, uses
When the blue chip of 457.5nm-460nm, green light relative spectral power has reached 0.5 or more, such as uses 457.5nm-480nm
Blue chip, green light relative spectral power can promote further.It is green when using 452.5-455nm blue chip in Figure 12
Light relative spectral is only between 0.3-0.4.
Also, by the test of different-colour light source, when the colour temperature of near-nature forest light is 2700K-3000K, 475-492nm wave
The green light relative spectral power of section is greater than 0.30；When the colour temperature of near-nature forest light is 4000K-4200K, the blueness of 475-492nm wave band
Light relative spectral power is greater than 0.40；When the colour temperature of near-nature forest light is 5500K-6000K, the green light of 475-492nm wave band is opposite
Spectral power is greater than 0.50.Backlight module is passed through frequently with high color temperature light source, and green light is higher at this time, and colour rendering is more preferable.
In the present embodiment, fluorescent film includes colloid and the fluorescent powder that is mixed in inside colloid, and fluorescent powder includes rouge and powder, green
Powder and yellowish green powder；The chromaticity coordinates of rouge and powder is X：0.660~0.716, Y：0.340~0.286；The chromaticity coordinates of green powder is X：0.064
~0.081, Y：0.488~0.507；The chromaticity coordinates of yellowish green powder is X：0.367~0.424, Y：0.571~0.545；It is rouge and powder, green
The weight ratio of powder and yellowish green powder is：Rouge and powder：Green powder：Yellowish green powder=(0.010~0.035):(0.018~0.068):(0.071~
0.253)；The concentration of fluorescent film is 17%~43%.The partial size of rouge and powder, green powder and yellowish green powder is respectively less than 15 μm, preferably 13 ± 2
μm。
By selecting above-mentioned blue chip and fluorescent film, white light can be obtained, spectrum is as shown in Figure 9.It has as follows
Optical parameter：When colour temperature is 2700K-3000K, the relative spectral power of 480-500nm wave band is greater than 0.30；500-640nm wave
The relative spectral power of section is greater than 0.70；When colour temperature is 4000K-4200K, the relative spectral power of 480-500nm wave band is greater than
0.45；The relative spectral power of 500-640nm wave band is greater than 0.65；When colour temperature is 5500K-6000K, 480-500nm wave band
Relative spectral power is greater than 0.4；The relative spectral power of 500-640nm wave band is greater than 0.60.This white light emitting element 210 with
Above-mentioned red light-emitting element 211 combines, and available LED light source 2 can issue near-nature forest light.
Further, with reference to Fig. 9 and Figure 10, the spectrum of LED light source 2 is also extremely similar with natural light in its all band, and
Existing near-nature forest radiant is then difficult to realize.Such as Fig. 7 and Fig. 8, the relative spectral power of orange-colored light is greater than 0.55 in near-nature forest light；
The relative spectral power of sodium yellow is greater than 0.50；The relative spectral power of green light is greater than 0.35；The relative spectral function of purple light
Rate is close with natural light less than 0.10.It is long for more comfortable visual experience in backlight module, can be provided for user
Time, which watches screen attentively, to feel fatigue.
In addition, LED light source 2 while each band spectrum more optimizes, is also required with stringent optical parameter, such as color
Temperature, color tolerance, colour rendering index Ra, colour rendering index R9, colour rendering index R12 and blue light color ratio etc..Specifically, near-nature forest light
Colour temperature includes 2500K-6500K, and color tolerance is less than 5, and blue light color ratio is less than 5.7%.It is aobvious to refer to that Ra is greater than 95, wherein the aobvious finger of R9
Aobvious finger greater than 90, R12 is greater than 80.It can determine that LED light source 2 can satisfy above-mentioned requirements according to Fig. 8, and LED light source 2
Blue light color ratio can be reduced to 5.5% hereinafter, colour rendering index Ra is increased to 97 or more, and colour rendering index R9 reaches 95 or more, colour developing
Index R12 has reached 83, and in other test report, colour rendering index R12 can achieve 87.
Further, the blue light of 440nm is maximum to the injury of eyesight in blue light, the case where blue light color ratio is lower than 5.7%
Under, the relative spectral power of 440nm blue light is lower than 0.65.Specifically, when the colour temperature of near-nature forest light is 2700K-3000K, 440nm
The relative spectral power of blue light is lower than 0.50；When the colour temperature of near-nature forest light is 4000K-4200K, the relative spectral of 440nm blue light
Power is lower than 0.60；When the colour temperature of near-nature forest light is 5500K-6000K, the relative spectral power of 440nm blue light is lower than 0.65.
This is that existing eyeshield electronic equipment is difficult to realize.Existing " eyeshield " electronic product, although blue light color ratio
It is lower, but the inhibition for wherein injuring maximum 440nm blue light to human eye is not obvious, eye-protecting function is very little.And blue light
In other wavelength band components visual acuity is necessary, significantly inhibit blue light not only eyeshield effect it is unobvious, can also be to youngster
The visual acuity of the crowds such as child, child causes adverse effect, such as due to the excessive missing of blue light ingredient, leads to anomalous trichromatism, distinguish color
The problems such as ability declines.The present embodiment by blue light color ratio be reduced to 5.7% it is below on the basis of, emphasis inhibit 440nm blue light
Intensity, can really play the role of protect eyesight.
In the present embodiment, the ratio between the luminous flux of the white light emitting element 210 and the light radiation of red light-emitting element 211
For 2-10:1, preferably 2-3:1.Under different colour temperatures, which slightly floats.In one embodiment, white-light emitting member
The quantity of part 210 and the quantity ratio of red light-emitting element 211 are 1-8:1, further preferably 1-4：1.Practical red light-emitting member
The light radiation of part 211 is 80-160mW, and the total light flux of white light emitting element 210 is 200-350lm.
In one embodiment, there are four white light emitting elements 210, red light-emitting element 211 has one, four white light hairs
Optical element 210 is set to around red light-emitting element 211 and is uniformly distributed.
In another embodiment, there are two white light emitting elements 210, red light-emitting element 211 has one, two white lights
Light-emitting component 210 is symmetrically disposed on the two sides of red light-emitting element 211.
About the mounting means of chip, preferably by blue chip and red light chips upside-down mounting in the surface of substrate 20, upside-down mounting core
Piece is conducive to effectively connect with the circuit 22 on substrate 20, is conducive to high efficiency and heat radiation, can be unified on chip by equipment
Film guarantees that the fluorescent film consistency of different product is good, and then consistency difference can be caused to avoid the dispensing process of formal dress chip
Problem, meanwhile, so that different product is in same BIN when colour temperature is identical, colour temperature consistency is good.
In addition, flip-chip but also the volume of white light emitting element 210 further decreases, is conducive to dimension of light source control
System.In the present embodiment, the width of white light emitting element 210 is less than 0.8mm, is highly less than 0.3mm, red light-emitting element 211
It can be controlled in same range.Adjacent white light emitting element 210 and 211 spacing of red light-emitting element is 1mm or less.LED light
The length in source 2 is less than or equal to 6mm, and width is less than 3mm.
Certainly, the present invention is not limited to using flip-chip, is also feasible using positive cartridge chip.
In one embodiment, substrate 20 is preferably the lamellar structure of nonmetallic materials production, and substrate 20 is equipped with reflection
Cup 201, white light emitting element 210, red light-emitting element 211 are set in reflector 201, and circuit 22 is formed in the table of substrate 20
Face, and the tow sides of substrate 20 are wrapped in, and pin is formed except reflector 201, the bottom exposed portion of reflector 201
Circuit 22, for being connect with white light emitting element 210 and red light-emitting element 211.
Further, the inner wall of reflector 201 is equipped with reflecting surface 2011, is also filled with packaging plastic inside reflector 201
Body (not shown), reflecting surface 2011 is for reflecting white light and feux rouges, and packing colloid is for protecting 201 internal junction of reflector
Structure and keep light-source structure more stable, and refraction adjustment is carried out to light.White light and feux rouges be sufficiently mixed after by packing colloid
Output.Specifically, the light emitting angle of white light emitting element 210 and red light-emitting element 211 can be 160 ° or so to 180 °, light
The light-emitting angle in source is 120 ° or so.Entire light source is the near-nature forest light lamp bead of small-sized uniformly light-emitting.
In the present embodiment, circuit 22 has several groups positive and negative anodes pin, can corresponding one group of each light-emitting component it is positive and negative
Pole pin or the corresponding one group of positive and negative anodes pin of several light-emitting components.In driving method, there are two types of embodiments, first, white
Light light-emitting component 210 and red light-emitting element 211 are separately connected different positive and negative anodes pins, are operated alone, at this time respective drive
Streaming current is different, and control chip can be cooperated to be controlled.Second, white light emitting element 210 and red light-emitting element 211 are gone here and there
Connection, that is, connect identical positive and negative anodes pin, and unified same current driving is not required to control chip and is controlled.This unified driving
Mode obviously there is apparent advantage, do not need to configure different driving currents for different light-emitting components, do not need to increase
Add control circuit 22, it is only necessary to power according to its corresponding electric current.Therefore, more simplified in structure, volume is further
Reduce, application is easier flexibly, and cost is lower.This is currently preferred 22 connection scheme of circuit.Specifically, white-light emitting
The actual ratio of the light radiation of the luminous flux and red light-emitting element 211 of element 210 is 2-3:1, electric current be 20-100mA it
Between, preferably 60mA.It is preferred that 211 in series light sources of 1-4 white light emitting element 210 and 1-2 red light-emitting element,
The power of single light source is 0.5W or so.
With reference to Fig. 5 and Fig. 6, two white light emitting elements 210 and a red light-emitting element 211 are connected, two white light hairs
Optical element 210 is separately connected first pin 221, and 221 self-reflection cup of the first pin, 201 bottom is stretched out, for connecting outside
Power supply.Red light-emitting element 211 is series between two white light emitting elements 210.
Further, which is also provided with second pin 222, which is not used in connection external power supply,
But be used to radiate, and promote the symmetry of light source entirety, the stability for promoting intensity and being installed on 22 plate of circuit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. backlight module, it is characterised in that：Including backboard, accommodating space is formed in the backboard, is installed in the accommodating space
There are dimming components, the dimming components are red in the near-nature forest light for importing and projecting the near-nature forest light that LED light source issues
The relative spectral power of coloured light is greater than 0.60；The relative spectral power of cyan light is greater than 0.30 in the near-nature forest light；It is described close
The relative spectral power of blue light is less than 0.75 in natural light；The colour rendering index Ra of the near-nature forest light is greater than 90, the colour developing
Index R9 is greater than 90, and the colour rendering index R12 is greater than 80.
2. backlight module as described in claim 1, it is characterised in that：The dimming components are light guide plate, and the LED light source is set
It is placed in the side of the light guide plate.
3. backlight module as described in claim 1, it is characterised in that：The dimming components are equal tabula rasa, and the LED light source is set
It is placed in the back side of the equal tabula rasa.
4. backlight module as claimed in claim 2 or claim 3, it is characterised in that：The backlight module further includes by the light modulation group
The light that part leaks out further is reflected back the reflector plate inside dimming components.
5. backlight module as claimed in claim 4, it is characterised in that：The periphery of the backboard with respect to its bottom bend and with
In the front frame engaging of installation display module, the position that the backboard engages with the front frame is equipped with the buckle and card mutually fastened
Slot.
6. backlight module as claimed in claim 5, it is characterised in that：The LED light source includes substrate, is set on substrate
At least one set of luminescence component, and the circuit being electrically connected with the luminescence component；Every group of luminescence component includes white light emitting element
With red light-emitting element, the white light emitting element includes the fluorescent film of blue chip and the covering blue chip, described red
Light light-emitting component includes red light chips；The white light of the white light emitting element transmitting and the feux rouges of red light-emitting element transmitting
Mixing, the feux rouges form the near-nature forest light for compensating the red light portion that the white light is lacked relative to natural spectrum.
7. backlight module as claimed in claim 5, it is characterised in that：The colour rendering index Ra is greater than 95, the colour rendering index
R9 is greater than 95.
8. backlight module as claimed in claim 6, it is characterised in that：The relative spectral power of purple light in the near-nature forest light
Less than 0.10.
9. backlight module as claimed in claim 6, it is characterised in that：The white light emitting element and the red light-emitting element
Pass through identical driving current unified driving.
10. backlight module as claimed in claim 9, it is characterised in that：The driving current is 20-100mA, the LED light
The power in source is 0.3-1.0W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679520.8A CN108870201A (en) | 2018-06-27 | 2018-06-27 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679520.8A CN108870201A (en) | 2018-06-27 | 2018-06-27 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108870201A true CN108870201A (en) | 2018-11-23 |
Family
ID=64295255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810679520.8A Pending CN108870201A (en) | 2018-06-27 | 2018-06-27 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108870201A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123324A1 (en) * | 2021-12-31 | 2023-07-06 | 深圳易联智能电气有限公司 | Light source assembly and light supplementing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989431A (en) * | 2004-07-23 | 2007-06-27 | 日立化成工业株式会社 | Diffraction type condensing film and surface light source device using same |
| CN102352970A (en) * | 2011-08-09 | 2012-02-15 | 中山大学 | Novel LED (light emitting diode) light source and illumination device thereof |
-
2018
- 2018-06-27 CN CN201810679520.8A patent/CN108870201A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989431A (en) * | 2004-07-23 | 2007-06-27 | 日立化成工业株式会社 | Diffraction type condensing film and surface light source device using same |
| CN102352970A (en) * | 2011-08-09 | 2012-02-15 | 中山大学 | Novel LED (light emitting diode) light source and illumination device thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123324A1 (en) * | 2021-12-31 | 2023-07-06 | 深圳易联智能电气有限公司 | Light source assembly and light supplementing device |
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