CN205657086U - Efficiency of light -emitting is improved glare of falling prevent blue light LED optical structure - Google Patents

Abstract

The utility model discloses an enough efficiency of light -emitting is improved glare of falling prevent blue light LED optical structure, including LED light source, flexible optics transition layer and lens, the LED light source arouses ce by the blue light that utilizes the transmission of inGaN chip: YAG yellow fluorescent powder, and then mix and obtain the white light by blue light and the produced gold -tinted of phosphor powder, flexible optics transition layer be flexible polysiloxanes gel, preassembles in the base light source chamber of lens, understands when LED light source and lens link together and fill the space between full light source and the lens owing to the extrusion of light source. Flexible optics transition layer can reduce the smooth full reflection loss who arouses and the reflection loss of optical interface when getting into optically thinner medium by optically denser medium, improve luminous efficiency, compare in realizing reducing the technique of blue light through pasting the filter coating, the utility model has the advantages of optics is efficient, and light is soft, and the facula is even, and the colour rendering is good, simple process, low cost.

Description

A kind of fall dazzle anti-blue light LED light structure improving light extraction efficiency

Technical field

This utility model relates to illumination optical, Display Technique field, and referring in particular to one can carry The fall dazzle anti-blue light optical texture of high light-emitting efficiency.

Background technology

Due to LED there is the long-life, volume is little, light efficiency is high, energy-conservation, good reliability, easily In the advantage that the conventional light source such as control are hardly matched, the most gradually apply at light fixture, TV, electricity The every aspect of people's lives such as brain display screen, smart mobile phone, panel computer, and keep rapidly Momentum of development.But, along with the continuous lifting of LED light effect, its brightness also improves constantly, Power rises to tens of watts of levels from milliwatt level, and the photo bio safety thus brought the most increasingly is subject to Attention to people.The light that these products (especially LED and display screen) send contains There is substantial amounts of high energy shortwave blue light.The research such as Noell in 1966 finds that the irradiation of blue light can be drawn Play the damage of retina cell, cause visual deterioration even to be lost.Eye regards light doctor in recent decades Educational circles it turned out blue light contamination and can produce serious influence the vision of the mankind.Therefore, effectively The radiation avoiding excess blue light is most important to protection vision.

Additionally, illuminating product in early days often puts undue emphasis on energy-saving effect, seek higher go out light Efficiency, and ignore the light impact on people's quality of the life.Due to LED light source power density Height, light source area is little, it is easy to produce dazzling direct glare, causes people visual not Suitable, this not only can affect space depending on seeing condition, still result in visual deterioration and psychology be unhappy Key factor.At present, it is common practice to use the diffuser that frosted processes so that send Light ratio is milder.But this way is that light efficiency compares to sacrifice a part of light intensity as cost Low.Therefore, suitably fall dazzle anti-blue light optical texture is found, for child, for a long time in room Worker under inside and outside strong light environment, have cataract and the patient of maculopathy, student race and For the working clan of life-time service computer, all have and be of great significance.

For the injury preventing blue light from causing human eye, people generally use two kinds of methods, and one is Adding one layer of filter coating in exiting surface part, absorb the excessive blue light that light source sends, two is logical Cross the glasses wearing anti-blue light.The common shortcoming of both approaches is that one is due to significant proportion Blue light absorbed, cause really arriving amphiblestroid blue light ratio on the low side, thus reduce aobvious Colour index, causes obvious cross-color, and the color sense that if things go on like this can cause optic nerve is photosensitive Sensitivity reduces, and has the risk causing color weakness or even achromatopsia.Two is whether filter coating or anti-indigo plant Optical glasses, all causes a certain degree of decay to overall luminous flux, and cause system goes out light Efficiency reduces.Moreover, this type of filter coating and the selection to long wave visible ray of the anti-blue light glasses Property transmitance relatively low, easily cause and decline regarding thing and chromatic discrimination power.The consistent hands that present stage takes Section is evaporation multi-layered antireflection coating, but effect is limited, and technique is loaded down with trivial details.And existing anti-blue light is filtered Mostly light film or anti-blue light glasses are that in resin base material doping or surface dip-dye flavochrome etc. are organic Stain, utilizes the neutralization principle of optical color neutralize to reach certain blue light or filter effect Really.But, owing to organic dyestuff weatherability is more weak, through light source long-term irradiation meeting weather stain, Can not be durable in use.

In existing lighting engineering (Fig. 2), between light source and optics, there is a layer of air interval Layer.Protection is played with close owing to often adding one layer of silica gel when LED encapsulates on lamp bead surface Envelope effect, its refractive index is about 1.56, and the refractive index of air is 1, and light is by optically denser medium When entering optically thinner medium, can be totally reflected more than the light of the angle of total reflection, simultaneously at each light Educational circles face all can cause reflection loss, causes the optical efficiency of system to reduce.How to take economy Effective technological means, reduces this partially reflective loss, for improving and improving illuminating effect, There is obvious realistic meaning.

Utility model content

In view of this, this utility model is for the deficiencies in the prior art, it is desirable to provide one is carrying In the case of high light-emitting efficiency, effectively reduce dazzle and prevent excess blue light from human eye being damaged LED light structure.

For achieving the above object, the technical scheme that this utility model is used is: one improves The fall dazzle anti-blue light LED light structure of light efficiency, including LED light source, flexible optical mistake Crossing layer and lens, the blue light that described LED light source is launched by utilizing InGaN chip excites Ce: YAG yellow fluorescent powder, carried out mixing by gold-tinted produced by blue light and fluorescent material the most again and Obtain white light；Described flexible optical transition zone is flexible organopolysiloxane gel, is contained in lens in advance Base light-source chamber in, when LED light source and lens link together can due to light source squeeze Press and fill full space between light source and lens.Flexible optical transition zone can reduce light by The total reflection that optically denser medium causes when entering optically thinner medium is lost and the reflection loss of optical interface, Improve light extraction efficiency.

Further, in described organopolysiloxane gel optical transition layer, incorporation is equivalent to polysiloxanes Gel adds the blue-light absorbers of quality 0.1%-0.3%.

Further, the refractive index of described organopolysiloxane gel is between 1.5-1.6.

Further, the light transmittance of described organopolysiloxane gel is more than 95%.

Further, described organopolysiloxane gel also includes brightener and light diffusing agent.

Further, described blue-light absorbers can select available blue light absorption on market Agent, such as substituted-phenyl azobenzene compound, that concrete can be 1-aryl-3-alkyl-4- Vinyl benzene azo group-5-hydroxypyrazoles；A preferred embodiment of the present utility model selects With the Metal Substrate derivatives of porphyrin being coated with by surfactant, wherein surfactant and metal The mass ratio of base derivatives of porphyrin is 1～10:1.

Further, described surfactant is dodecylbenzene sodium sulfonate.

Further, the optical surface of described lens is covered with the scute knot of difformity and size Structure, described scute structure can be one or more in tetragon, pentagon or hexagon.Light LED light source wavefront division is become numerous pictures by the scute structure on surface, thus greatly carries Rise the light-emitting area of human eye perception, reduce dazzle.

What employing this utility model was brought has the beneficial effect that, while reducing excess blue light, Not only will not cause the reduction of light extraction efficiency, light extraction efficiency can be made on the contrary further to be carried Rise, keep enough color rendering propertiess simultaneously；Live by adding layer of surface on blue-light absorbers surface Property agent, improves and improves the weatherability of blue-light absorbers；By the scute of lens optical surfaces Design, reduces light fixture or the dazzle of optical system.Realize subtracting compared to by stickup filter coating For the technology of few blue light, the fall dazzle anti-blue light improving light extraction efficiency that this utility model provides LED light feature optical efficiency is high, and light is soft, and hot spot is uniform, and color rendering properties is good, technique Simply, with low cost.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:

Fig. 1 is the fall dazzle anti-blue light LED light structure tool of raising light extraction efficiency of the present utility model The overall structure schematic diagram of body embodiment；

Fig. 2 is LED light structural representation of the prior art；

Fig. 3 be optical surface be the structural representation of the lens detailed description of the invention of scute；

Fig. 4 is the spectral distribution curve of LED light structure of the prior art；

Fig. 5 is the fall dazzle anti-blue light LED light structure of raising light extraction efficiency of the present utility model Spectral distribution curve.

Fig. 6 is the fall dazzle anti-blue light LED light structure of raising light extraction efficiency of the present utility model Light path schematic diagram.

Accompanying drawing illustrates: 1.LED light source；2. flexible optical transition zone；3. lens；4. surfactant； 5 Metal Substrate derivatives of porphyrin.

Detailed description of the invention

By further appreciating that feature of the present utility model, technological means and the concrete mesh reached , function, resolve advantage of the present utility model and spirit, by below in conjunction with accompanying drawing with concrete This utility model is further explained by embodiment.

Basic Design theory of the present utility model is as follows: determine according to the applied environment of optical texture Suitable light-configuration mode, and with optical simulation software according to regulation lens sizes, rising angle, Illumination and uniformity design optical surface are the lens of scute.Designed by scute structure 6, will LED light source 1 wavefront division becomes hundreds of picture, the light-emitting area of significant increase human eye perception Long-pending, thus reduce dazzle.Scute can take many forms, tetragon, and hexagon is all fair Permitted.During design, the medium between light source 1 and lens 3 is preset as the poly-of refractive index 1.56 Silicone gel.The material of lens is PMMA or PC, and design result is as shown in Figure 1.Adopt Analyze with lighting calculation software and thus plant the light fixture of optical texture formation in actual application environment Type unified glare value (UGR), change scute (6) size, relief height and shape, Whether test design result meets the requirement of GB50034-2013 " standard for lighting design of buildings ". Lens are made according to design result.The lens made and design object are analyzed also Suitably revise, to guarantee that actual effect is consistent with goal-selling.

Weigh 99.8g for making the organopolysiloxane gel of optical transition layer 2, add 0.2g by The Metal Substrate derivatives of porphyrin 5 of dodecylbenzene sodium sulfonate cladding, wherein contains 0.18g 12 Sodium alkyl benzene sulfonate, 0.02g Metal Substrate derivatives of porphyrin, made by 12 by magnetic stirring apparatus The Metal Substrate derivatives of porphyrin 5 of sodium alkyl benzene sulfonate cladding is dispersed in organopolysiloxane gel In, and it is stand-by to be de-gassed process with industry vacuum pump.

Take the mixture produced by approach described above in right amount, be filled in the light-source chamber bottom lens In.The loading of soft silicone gel is with when LED light source and lens combine Having a small amount of spilling to be advisable, overflowing quality is add quality 1%～20%.With the quick light of LED Color electricity integrated test system test spectral distribution after above process, test result is shown in Fig. 4. As can be seen from Figure 4, with unprocessed before test result (Fig. 3) compared with, the intensity of blue light and Ratio has obtained certain reduction.

It is applicable to organic polyorganosiloxane gel of the present utility model and includes but not limited to acrylate The polysiloxanes of end-blocking and the polysiloxanes of methacrylate end-blocking, wherein said polysiloxanes Containing appropriate aromatic portion to make the refractive index of polysiloxanes at least above 1.5.Preferably, Described each polysiloxane unit mean molecule quantity is about between 1000-10000.And gather The molecular weight of siloxanes is approximately greater than 1000, but is no greater than 300000.

In existing lighting engineering (Fig. 2), between to the air between LED light source and lens Interlayer does not does suitable process, owing to light total reflection when optically denser medium enters optically thinner medium is damaged Become estranged the reflection loss at optical interface, finally can only obtain the total light flux that luminescence chip sends In about 88% luminous flux.In this utility model (Fig. 6), due in LED light source (1) And between lens 3, with the addition of flexible optical transition zone 2, although in flexible optical transition zone 2 Blue-light absorbers can cause a little loss of luminous flux, but anti-due to decrease at optical interface Penetrate loss, the most about can obtain the light of 96% in the total light flux that luminescence chip sends and lead to Amount.

Embodiment described above only have expressed some embodiments of the present utility model, and it describes relatively For concrete and detailed, but therefore can not be interpreted as the restriction to this utility model scope.Should When it is noted that for the person of ordinary skill of the art, without departing from this utility model On the premise of design, any modification, equivalent substitution and improvement done, deformation etc., all comprise Within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with institute Attached claim is as the criterion.

Claims (4)

1. the fall dazzle anti-blue light LED light structure improving light extraction efficiency, it is characterized in that, including LED light source (1), flexible optical transition zone (2) and lens (3), the blue light that described LED light source (1) utilizes InGaN chip to be launched excites Ce:YAG yellow fluorescent powder, is carried out being obtained by mixing white light by gold-tinted produced by blue light and fluorescent material the most again；Described flexible optical transition zone (2) is flexible organopolysiloxane gel, it is contained in advance in the base light-source chamber of lens (3), the space between full light source (1) and lens (3) can be filled due to the extruding of light source when described LED light source (1) and lens (3) link together.

The fall dazzle anti-blue light LED light structure of raising light extraction efficiency the most according to claim 1, it is characterised in that (x, y) coordinate is (0.33 ± 0.05,0.33 ± 0.05) to the CIE of described optical texture emergent light.

The fall dazzle anti-blue light LED light structure of raising light extraction efficiency the most according to claim 1, it is characterised in that described optical texture goes out the color rendering index of light more than 80.

The fall dazzle anti-blue light LED light structure of raising light extraction efficiency the most according to claim 1, it is characterised in that the optical surface of described lens is covered with scute structure (6).