TW201307460A - Material composition containing refractive index matching specific wavelength section - Google Patents

Abstract

The present invention provides a material composition containing a refractive index matching a specific wavelength section, which is characterized in including (a) resin or its composite material as the binding agent, and (b) medium material of the metal oxide or composite metal oxide with predetermined particle size as the additive for refractive index matching a specific wavelength section, which is the composition completed by the combination of the binding agent and the additive. The composition material uses the light source <lambda> excited by the light-emitting diode (LED) grain or the fluorescent agent as the section range and adds a nano-particle having optical thickness D=<lambda>/4n as the basis to form the effective medium layer to complete the matching refractive index of the specific section bandwidth wavelength. Corresponding to the different refractive index nx of LED grain materials, an appropriate amount of nano-particles are added, such that the refractive index of the combination corresponding to the wavelength section is made to be equal to the square root of nx. The refractive index can be matched with the LED grain, so that the light emitted from the LED can all enter into the composition material to finally enter favorably into the air medium material to increase the LED light-taking efficiency to be used as the packaging of high LED light-taking efficiency; or the light emitted from the LED is made to be able to enter into the fluorescent agent to participate in the reaction to finally form the white light to favorably enter into the air medium material to increase the light-taking efficiency of the white LED to be used in the transparency-enhancing packaging of the white LED.

Description

Material composition having a specific segment wavelength matching refractive index

The present invention relates to a package material composition having a specific segment wavelength matching refractive index, which is prepared by using metal oxide nanoparticles having a specific D=λ/4n optical thickness as an additive and then mixing with a binder resin. A particular segment wavelength matches the refractive index of the material composition.

The present invention relates to a wavelength-matching refractive index material having a specific segment, which is a wavelength of light excited by a light-emitting diode LED, and is a specific segment; and a refractive index of a grain material n _x , a refractive index of the package material composition The rate is approximately ≦√n _x , as a diode-matched index of refraction, with a specific segment wavelength matching refractive index.

The present invention relates to a package material composition having a specific segment wavelength matching refractive index, which is composed of a resin, a nano metal oxide having a refractive index greater than or less than a refractive index of a resin, or a composite metal oxide, or One or more of the components dispersed in the resin are added to form a package material composition having a specific wavelength section matching refractive index.

The present invention relates to a package material composition having a specific segment wavelength matching refractive index, which is a nano metal oxide having a specific wavelength of D = λ / 4n optical thickness, which is a wavelength of λ of a fluorescent agent, Or a composite metal oxide, as a phosphor segment wavelength improving refractive index additive, forming a package material composition having a specific refractive index wavelength segment matching refractive index.

The present invention relates to a package material composition having a specific segment wavelength matching refractive index, which composition may include two or more segment matching refractive indices such as a wavelength of a phosphor light-emitting segment and an LED light-emitting segment wavelength. The nanoparticle additive forms a package material with a specific white light wavelength multi-segment matching refractive index.

The light-emitting diode (LED) package uses a resin as a material. The resin usually has a refractive index of 1.4 to 1.5, and has a large difference in refractive index from a light-emitting diode grain material of 2.5 to 3.5, which reduces light for a light-emitting diode application. The light-emitting efficiency is currently introduced by 1. introducing an aromatic ring; 2. introducing a halogen element 3. introducing a sulfur element 4. selecting to add inorganic nano-particles, and adjusting the refractive index for improvement.

In particular, the addition of inorganic nanoparticle is known to have a nanoparticle having a transparent single metal oxide such as Ti, Zn, Mg, Nb, Sn, Zr, Ce, Ta, La, Hf, Si, Al or In. The material is added to the resin to form a high refractive index material. On the other hand, various composite metal oxides containing a plurality of elements selected from the above metal elements, Ti, Zn, Mg, Nb, Sn, Zr, Ce, Ta, La, Hf, Si, Al or In have also been proposed. For example, a composite metal oxide such as a composite oxide of titanium oxide-zirconia-tin oxide and a composite oxide of tin oxide-titanium oxide, and a resin is added to form a high refractive index layer, and is a known technique.

Regarding the method of introducing organic into the inorganic substance, for example, an inorganic oligomer and an organic copolymerization method are employed, and at this time, the inorganic size becomes a molecular level, and it is impossible to design a specific segment wavelength, and there is room for improvement. In addition, there is also a way to emphasize that the nanoparticles must be less than 20 nm. When the particle size of the nanoparticles is less than 1/4 wavelength of visible light, especially when the particle size is an even multiple of 1/2 wavelength, as shown in Fig. 4, it will form. The ineffective layer has less influence on light, so the amount of addition needs to be large, and the refractive index is limited, and the matching optimization cannot be achieved.

In addition, another method is to use a composite oxide of tin oxide-titanium oxide having a particle size of less than 1×10 ^-8 m, which is added to an organic resin (nano particle size is less than λ/10), and is suitable for Rayleigh scattering. The principle is also related to the wavelength and particle size, inversely proportional to the fourth power of the wavelength, proportional to the fourth power of the radius of the nanoparticle, and when the particle size is an even multiple of 1/2 wavelength, an ineffective layer is formed. When the nano-particles are added, the amount of addition needs to be large, and the relative viscosity coefficient will increase, which will affect the fluidity of the glue, which is unfavorable for subsequent packaging, and there is no room for improvement in the segment wavelength matching design.

In the prior art, the relationship between the wavelength and the nanoparticle is expressed by geometric thickness, for example, the Rayleigh scattering particle size is less than λ/10, and the nanoparticle diameter of the Mill scattering is greater than λ/10, the relationship between particle and wavelength is estimated by geometric thickness. It is impossible to accurately estimate the optimal nanometer particle size, ignoring the influence of the refractive index of the dielectric material on the light passing through, and the mutual refractive index of light in different dielectric materials. The description of the relationship ignores the optical thickness that really affects the optical path (D=λ/4n, adding the refractive index n of the influence factor on the optical path). For the adjustment of the wavelength of a particular segment, the relative relationship with the optical thickness is not explained. Only one glimpse of the addition of small particle nano-metal oxides is compared with the prior art differences as shown in Table 1.

The main object of the present invention is to provide a package material composition having a specific segment wavelength matching refractive index for matching the refractive index of the light emitting diode crystal grains, so that the light emitted from the self-luminous diode can enter the air medium. The light-emitting diode is increased in light-emitting efficiency. Furthermore, since the light is directed out and does not accumulate on the light-emitting diode, the heat energy is greatly reduced, that is, the demand for the external heat-dissipating mechanism is reduced, and the cost can be reduced. .

A second object of the present invention is to provide a specific segment wavelength matching refractive index, using a nano metal oxide or a composite metal oxide as a segment refractive index improving additive, and the particle diameter of the nano metal oxide D=?/ 4n optical thickness, forming the effective segment wavelength improving dielectric layer as a segment wavelength matching refractive index optical property additive material. A resin is used as a fixing substrate for bonding a nano metal oxide to form a composite material composition as a material composition of a specific segment wavelength matching refractive index.

Another object of the present invention is to provide an encapsulating material composition that matches the refractive index of the phosphor such that the refractive index of the encapsulating material composition matches the fluorescent agent, so that light emitted from the fluorescent agent can enter the air. In the medium.

Another object of the present invention is to provide an encapsulating material composition that matches a refractive index of a light-emitting diode die and a phosphor, the refractive index of the encapsulating material composition being matched with the light-emitting diode die, The light emitted by the light-emitting diode can enter the phosphor to participate in the reaction, so that the light emitted from the phosphor can enter the air medium.

The light-emitting diode has the following three characteristics:

a. A pleochroic light source, depending on the energy level of the material used, causes the photon energy to produce light of different segment wavelengths, that is, the so-called specific segment wavelength of the present invention. b, high luminous power and low light extraction efficiency. c. Life and heat are inversely proportional. Moreover, the waste heat generated by the light-emitting diode has always been a major problem, and thus many heat-dissipating technologies have been derived, such as a high thermal conductive substrate, a thermal conductive paste, a thermal conductive paste, a heat transfer tube, and the like. The inventor of this case is well aware of the source of waste heat, and a small part is caused by material absorption. For the most part, the light extraction efficiency is not good, and the reason for poor light extraction efficiency is:

1, the penetration loss of light (the angle of incidence is less than the critical angle of the interface reflection), and

2. Total reflection loss of light (incident angle is greater than the critical angle of total internal reflection).

Therefore, the light-emitting diode has a light-emitting efficiency of about 20%, and other light is enclosed in the crystal grains to form a waste heat source.

Furthermore, the light-emitting diode light source has the characteristics of a specific segment wavelength bandwidth, a specific III, V-group element material, and a specific material refractive index, so that the single-refractive-index packaging material cannot satisfy the demand, and there is internal reflection and total total reflection. loss.

In short, most of the sources of waste heat are formed by poor refractive index matching of optical characteristics, and the present invention uses optical characteristics as a solution to increase light extraction efficiency. As briefly described below:

1. When the light enters the n ₁ medium from the n ₂ medium at an incident angle smaller than the critical angle, part of the light enters the n ₁ medium due to the refractive relationship, and the other part of the light is based on the Fresnel Equations light loss=[(n ₂ -n ₁ )/ (n ₂ + n ₁ )] ² × 100%, and reflected back to the n ₂ medium affects light extraction efficiency. The invention matches the refractive index of the n ₂ medium to reduce the loss of light through the n ₁ medium, thereby increasing the light extraction efficiency.

2. When the light enters the n ₁ medium from the n ₂ medium at an incident angle greater than the critical angle, it is limited by the critical angle θ=arcsin(n ₁ /n ₂ )=sin ^-1 (n ₁ /n ₂ ) to form internal total reflection. From the above formula, the larger the refractive index value of the n ₁ medium, the larger the critical angle θ angle value. According to the present invention, the proportion of total internal reflection of light is lowered, and the critical angle is effectively expanded to increase the light extraction efficiency.

3Reducing the ratio of in-situ reflected light: matching the refractive index encapsulating material composition, forming nano-particles and resin on the crystal interface, discontinuous film interface with different refractive index, similar to rough-formed surface, helping light scattering, effectively reducing In-situ reflection of light to increase light extraction efficiency.

In view of the above advantages, in order to enable the reviewing committee to further understand the present invention, a preferred embodiment is disclosed as follows.

The present invention is a package material composition having a specific segment wavelength matching refractive index. The embodiments are suitable for the purpose of illustrating the invention and are not intended to limit the scope of the patent.

An embodiment of the encapsulating material composition having a specific segment wavelength matching refractive index is represented by [(Rn) _(1-a) + (Mna) _a ] = RM √ nx composition, R: resin Refers to epoxy resin, fluorenone resin, UREA, PMMA, PC, PI, etc. or a composite thereof, n is the refractive index of the resin material; M: Ti, Zn, Mg, Nb, Sn, Zr a metal oxide such as Ce, Ta, La, Hf, Si, Al or In, or a composite oxide of a composite oxide of titanium oxide-zirconium oxide-tin oxide and a composite oxide of tin oxide-titanium oxide, na Is the refractive index of the nanoparticle material.

The size of the nanoparticle of the above metal oxide or composite metal oxide is determined by the segment size D as the nanoparticle size, and D is the corresponding illuminator λ, with D=λ/4n ( The optical thickness of n is the refractive index of the additive is the particle diameter, and is used as the basis for selecting the segment wavelength λ demand domain to form the segment wavelength effective medium layer; a and (1-a) are the wt% of the two substances or Volume ratio, increasing or decreasing the amount of additives according to the refractive index required; RM: R and M composition; nx: refractive index of the light-emitting diode grain material, √nx: as the refractive index of the RM composition, The matching refractive index of the grain material can match the crystallite of the light-emitting diode, so that the light emitted by the self-luminous diode can enter the air medium, and the light extraction efficiency is good.

For example, the second light-emitting diode of the second light-emitting diode has a GaP material, the light-emitting λ is a light source of 565 nm, the refractive index is 3.42 (nx), the refractive index of the epoxy resin is 1.51, the refractive index of the additive is ZrO ₂ is 2.0, and D=λ/4n=565. /4 × 2 = 70.6 nm optical thickness particle size, with the peak size distribution in the 70.6 nm particle size distribution, the composition of the package is optimized, the specific section 565nm λ is optimized to match the refractive index √nx ≦ 1.85; air n ₀ = 1.

Therefore, when nx>√n _x , the reflectivity will have a minimum value. When √n _x >n ₀ , the reflectivity will have a minimum value, so that the light is transmitted from nx to √n _x and then to n ₀ air. As shown in Figure 4. According to the Fresnel Equations formula, light entering the √nx(2-4) medium from nx(2-1) will have 8.9% light reflection loss, and light entering the √nx(2-4) from n ₀ medium air will have 8.8% light. The reflection loss, the light is turned 180 degrees by the light into the light-tight circumference, so the opposite signs cancel each other out, and finally only 0.1% of the light reflection loss, the light from the light-emitting diode (LED) penetration rate to the amount of air medium increases √nx is the matching refractive index referred to in the present invention and is also the refractive index of the composition encapsulating material composition.

In summary, the embodiments of the present invention have considered the following four characteristics of the light-emitting diode:

1. Single-beam light source: The crystal light-emitting wavelength of the light-emitting diode has a specific segment range, so only a specific wavelength region can be matched for function matching, and the easiest processing cost is the lowest.

2, the grain material has a specific refractive index: the light-emitting diode has a specific combination of III and V element materials, so there is a corresponding refractive index generation, the packaging material is not the higher the refractive index, the better, the matching refractive index can be optimized .

3. Matching of the refractive index of the λ segment of the illuminating wavelength of the illuminating diode: the illuminating wavelength of the illuminating diode in different sections and the corresponding refractive index difference of different grain materials, there will be different wavelength band width matching refracting Rate demand.

4, the optical path specificity of the optical thickness of the nanoparticle: the particle size of the nanoparticle additive, the best influence on the light lies in the optical path corresponding to the optical thickness of 1/4λ, rather than the smaller the better or the better.

Accordingly, the package material composition having a specific segment wavelength matching refractive index according to an embodiment of the present invention includes the following features:

1. Specific segment wavelength: The light-emitting diode and the fluorescent agent λ are both in the category of monochromatic beam segments, and belong to only a small segment of the full spectrum, which is the so-called specific segment wavelength of the present invention.

2. Matching refractive index: The refractive index n _{x of the} light-emitting diode grain material is obtained to obtain a refractive index of approximately √n _x as a matching refractive index.

3. Segment nano additive: The nanoparticle of the additive is metal oxide. The particle size is calculated based on the optical thickness of the segment wavelength 1/4λ, D=λ/4n, which is selected as the particle size of the nanoparticle. According to, as a segment matching refractive index adjustment.

4. Multiple segment matching: The fluorescent agent emits light due to excitation, which is equivalent to a light source. It also needs a specific segment wavelength matching refractive index encapsulation material to increase the light extraction efficiency. And the light-emitting diode (LED) and the fluorescent agent are each attached to a small section of the spectrum, and the particle size of the additive is selected to be a multi-dimension multi-segment, so that one or more segment matching can be performed.

5. Packaging material composition: a resin is used as a binder main body, and an improved segment refractive index nano metal oxide additive is added to complete a specific segment wavelength matching refractive index encapsulating material composition of the present invention.

In the embodiment of the present invention, the fluorescent agent for the excited light is equivalent to the light source, and the light emitted by the fluorescent agent passes through different refractive index media, and also has reflection, refraction and total total reflection, in order to increase the amount of the fluorescent agent. Taking light _- receiving efficiency, using the matched refractive index material composition of the present invention, the composition of [(Rn) _(1-a) + (Mna) _a ]=RM√nx is represented by the following formula: the wavelength of the fluorescent agent Λa is a segment, and a D-particle nano-metal oxide Mna is added, and the refractive index of the phosphor material is nx, forming a RM√nx matching refractive index material composition, so that light excited by the fluorescent agent is easily derived. The fluorescent agent is a composite metal oxide or a composite metal nitride or a composite metal sulfide fluorescent agent such as: YAG:Ce ⁺ ; YAG:Td ⁺ ;YAG-Nd ⁺ ;YAG-TAG;SrGa ₂ S ₄ :Eu ⁺ ; Sr ₂ Si ₅ N ₈ :Eu ⁺ ;SrS:Eu ⁺ ;SrGa ₂ S ₄ :Eu ⁺ ;Ba ₃ Si ₆ O12N ₂ :Eu ⁺ ;CaAlSiN ₃ :Eu ⁺ ZnSe......etc. The material makes the light extraction efficiency increase.

The composition of the embodiment of the present invention may also comprise two or more different segment wavelengths, and the matching refractive index encapsulating material is as shown in Table 7. The λ of the segment wavelength has two, one is the wavelength of the blue light of the crystal λ= 472 nm; The emission wavelength of the phosphor is λ _a = 574 nm (2-5), so there are also two kinds of D particle diameter added. As shown in Fig. 3, one segment matches the grain 2-3, and the other segment Matching Fluorescent Agents 2-7, two nanoparticle size additives, form two segment wavelength matching encapsulating material compositions 2-6. When the grain emission wavelength λ472nm and the YAG:Ce ⁺ phosphor emission wavelength λ _a 574nm complement each other, we see white light as shown in Fig. 3. RM√n _x : a composition referred to in the present invention. The best matching refractive index segment wavelength corresponds to the refractive index of the light-emitting diode material, and the refractive index segment can match the light-emitting diode grain wavelength λ=472 nm, so that the light emitted from the self-luminous diode can be Entering the fluorescent agent to participate in the reaction; another optimal section corresponds to the wavelength of the luminescent agent λ _a = 574 nm, and the refractive index can be matched with the luminescent agent illuminating section, so that the light excited by the fluorescent agent can be exported to in the air. The blue light and the yellow light are complementary to form a white light with good light extraction efficiency, and the red and green fluorescent agents can also be added to the RM composition, and the refractive index can be matched with the red and green fluorescent light emitting sections to make the firefly The light excited by the photo-agent can be exported to the air to form high-light-efficiency red, green and blue three-color white light. The RM composition can also be red, green and blue, and the refractive index can be red and green. The blue three kinds of phosphors have matching light-emitting sections, so that the light excited by the fluorescent agent can be led out into the air to form a high light-receiving efficiency red, green and blue three-color white light, and the white light multi-section matching refractive index encapsulating material composition is completed.

Wherein, the particle size of the composite metal oxide may be corresponding to the wavelength of the light emitted by the light emitting diode or the fluorescent agent, and a particle size distribution of 0.01% to 8% is added, and the peak is approximately equal to the optical thickness of λ/4n. The nanoparticle is a category and is used as a segment wavelength index adjustment additive.

The invention is to add nano particles with a specific segment grain emission wavelength λ particle diameter D=?/4n, which can be processed by wet nanobead grinding, and the finished product is detected by a particle size analyzer, and its peak (peak) ≒D is the corresponding wavelength optical thickness particle size referred to in the present invention, which is added to the resin 1-4 to form the composition 1-6 as a specific segment wavelength λ matching refractive index additive. In other words, when the particle diameter D should be equal to an odd multiple of the 1/4 wavelength λ optical thickness, the reflectance will be a maximum or minimum value as shown in Fig. 4, when the particle diameter D should be equal to an even multiple of the 1/2 wavelength λ optical thickness. When the starting point of the regression is called the invalid layer, as shown in Fig. 4, when the refractive index of the nanoparticle is larger than that of the resin, the maximum value is increased to increase the reflectance 3-1, and when the refractive index of the nanoparticle is smaller than that of the resin, a minimum value is generated. Increasing the transmittance by 3-2 is therefore advantageous for completing the matching of the refractive index.

Also, please refer to Table 2, GaP grain material 2-1, λ565nm source is the segment wavelength, refractive index n _x = 3.44; resin with epoxy resin refractive index 1.51, additive with ZrO ₂ refractive index 2.0, D = λ / 4n = 565 / 4 × 2 = 70.6 nm, the composition of the package encapsulated with a peak in the particle size distribution of 70.6 nm. According to the refractive index formula n=c/υ; c is the speed of light in vacuum, n is the refractive index of the medium and υ is the speed of light in the medium, which is inversely proportional to the single-beam wavelength of the light-emitting diode (LED)? When the light is incident on the high refractive index medium (optical thickness D), the speed becomes slower, and the higher the refractive index medium nanoparticle passes through the optical path, the speed becomes slower, and the n=c/υ speed becomes slower relative refraction. The higher the rate, the characteristic analysis and calculation method of optical thickness, mainly adopts the matrix method of characteristic admittance. This method also forms the basis of the calculation and design of optical thickness. The present invention also uses the Fresnel Equations formula to derive the corresponding The refractive index of the wavelength, such as the reflectance of 7.8 nm in Table VIII, is 7.8%, and the absorption of epoxy resin and ZrO _{2 is} extremely small, and the refractive index of the section of the wavelength of 470 nm is 1.78.

When the refractive index of the nanoparticle is larger than the resin, the more the addition amount a (wt%), the higher the refractive index, the higher the refractive index to √n _x , the refractive index of the best matching wavelength, and the refractive index of the nanoparticle is smaller than that of the resin. In the case where the amount of addition of nanoparticles a (wt%) is higher, the refractive index is lower, and thus the ease of processing of the matching refractive index composition is obtained.

The nano particles are determined according to the wavelength of the corresponding crystal light emission wavelength λ/4n, such as IR light of 750-1050 nm; red light of 620-750 nm; orange light of 592-620 nm; yellow light of 578-592 nm; 513~ 578nm green light; 500-513nm blue-green light; 464-500nm blue light; 446-464nm deep blue light; 446-400nm purple light; 360-400nm UV light, etc., corresponding to 1/4λ wavelength of light, divided by The refractive index of the nanoparticle material, the obtained optical thickness particle size, as the corresponding segment wavelength additive, the corresponding segment matching refractive index composition is obtained as IR light, red light, orange Light, yellow light, green light, blue-green light, blue light, deep blue light, purple light, UV light, etc. The light-emitting diode matches the refractive index of the encapsulating material.

Similarly, R (red), G (green), and two kinds of phosphor materials are added to the resin of the encapsulating material, and the metal oxide Mna of the optical thickness D is matched with the crystal material of the light source of the light source of 400 to 490 nm. And corresponding to R, G, two kinds of fluorescent agents, matching two fluorescent wavelengths λ _a , optical thickness D of the metal oxide Mna, forming a specific wavelength multi-region matching refractive index composition, as a specific white light wavelength matching refractive index Packaging material composition. Similarly, a 360-400 nm ultraviolet (UV) light-emitting diode can be used as a light source, and a light source grain material is added to match the optical thickness D of the metal oxide Mna, and the wavelengths of the three fluorescent agents corresponding to R, G, and B (blue). λ _a , matching the metal oxide Mna of the optical thickness D, forming a multi-wavelength segment matching refractive index composition as a white-light matching refractive index encapsulating material composition of the R, G, B three primary color specific segments.

Further, the inorganic phosphor may be YAG:Ce ⁺ , YAG:Td ⁺ , YAG-Nd ⁺ , YAG-TAG, SrGa ₂ S4:Eu ⁺ , Sr ₂ Si ₅ N ₈ :Eu ⁺ , SrS:Eu ⁺ , SrGa ₂ S ₄ :Eu ⁺ , Ba ₃ Si ₆ O12N ₂ :Eu ⁺ , CaAlSiN ₃ :Eu ⁺ one or more kinds of mixing, and the light-emitting wavelength of the fluorescent agent is a segment, and the corresponding one is added to the resin The nanoparticle of the wavelength particle size is further added to the phosphor as a specific fluorescent segment matching refractive index material composition.

In addition, the light-emitting diode has a specific multi-segment wavelength of light blue, the light source is between 400 and 490 nm, and includes a yellow fluorescent agent wavelength section; or includes two colors of green and red wavelengths; or includes red, Green, blue three-wavelength fluorescent agent segment, in which a plurality of segments corresponding to each of the wavelength nanoparticle particles are added to match the broad blue multi-segment refractive index as a specific multi-segment white light wavelength matching refraction The composition of the encapsulating material.

The specific multi-segment wavelength of the light-emitting diode is between 360 and 400 nm, and includes a plurality of phosphor wavelength segments of red, green, and blue, and a plurality of segments are added to the resin corresponding to the wavelengths. A composition of nanoparticles that matches the multi-index of ultraviolet light as a package material composition for a particular multi-segment white light wavelength matching refractive index.

An encapsulating material composition having a specific segment matching refractive index has the following advantages:

1. Increasing the light extraction efficiency: matching the refractive index material to form a light-transmitting layer, so that the light energy of the light-emitting diode can be smoothly exported into the air, and the lumen of the light-emitting diode is increased.

2. Ease of production: The light of the light-emitting diode is basically called a single beam, and it is easy to calculate the nano-particles corresponding to the optical thickness of the segment wavelength D=?/(4×n) to form a corresponding effective dielectric layer. The amount of the nanoparticle added is such that the optimum segment matching refractive index mass production is easy.

3. Reduce the expansion coefficient: the coefficient of expansion of the resin is usually larger than that of the light-emitting diode. The expansion coefficient of the inorganic metal oxide is usually smaller than that of the resin. Therefore, adding a high refractive index metal oxide helps to reduce the expansion coefficient and contribute to dimensional stability. .

4. Reduce waste heat generation: The absorption coefficient of the light-emitting diode material is usually less than 10%, and the light extraction efficiency is 20%. The other 70% useful light is converted into useless waste heat. Therefore, when the light extraction efficiency is improved, the waste heat will be relatively The reduction is reduced, and the demand for the heat dissipation mechanism after packaging is reduced, and the relative application is cost-effective.

5. The life of the light-emitting diode is increased: the light-emitting diode has good light-emitting efficiency and the temperature is lowered. The lower the operating temperature of the light-emitting diode, the longer the life is as shown in Table 2, and the relative light source replacement cost is low.

6. Light-emitting diode white light process efficiency: the refractive index can be matched with the light-emitting diode crystal, so that the light emitted by the self-luminous diode can enter the phosphor to participate in the reaction, and the fluorescence efficiency is high, and the refractive index is high. It can match the fluorescence emission wavelength λa, and the fluorescence light extraction efficiency is good.

In the following, two direct data examples are provided to make it easier for those skilled in the art to understand the present invention:

Example 1: The encapsulating material composition of the segment matching refractive index is illustrated as follows: According to [(Rn) _(1-a) + (Mna) _a ] = RM √ nx composition representative formula. Among them, Rn: a bisphenol A type epoxy resin having a refractive index of 1.51. Mna: ZrO ₂ refractive index 2.0 particle size distribution peak at Peak = 55.65 nm. a: 1.25 wt%. 1-a:=98.75wt% implementation steps The operation flow according to Figure 1 is as follows:

1. Metal zirconia (degussa ZrO ₂ ) starting source material 1-1, using ethyl acetate as an surfactant, using MEK butanone as a solvent, placing in a bead mill 1-2 grinding process, using a particle size distribution meter Measurements were carried out to obtain a nanoparticle having a particle diameter Peak peak of 55.65 nm as a center distribution.

2. Take epoxy resin (1-3) 98.75wt%; 55.65nm ZrO ₂ 1.25wt%, co-injection into the mixed crucible 1-4 mixed dispersion processing.

3. Take the sample curing to 2 × 6 × 30mm, and measure the light reflectance meter 5 and 450nm refractive index 1-5, which is the predetermined value.

The composition of this data example has a particle size distribution center at 55.65 nm as shown in Table 5, which is close to the set value, and peak ≒D=λ/4n, so λ=4Dn=4×55.65×2=445.2 nm And the reflectance peak of Table 5 is 450nm within the allowable error value, and the measured value of reflectance of 450 nm in Table 5 is 5.3%, according to the formula Fresnel Equations optical loss = [(n ₂ -n ₁ ) / (n ₂ +n ₁ )] ² ×100%, so [(n ₂ -1)/(n ₂ +1)] ² × 100% = 5.3%, so the refractive index n ₂ = 1.6 ≦√ nx. Taking the blue light wavelength λ=450nm of the light-emitting diode and the refractive index nx of the material as 2.6, the specific segment wavelength matching refractive index package as shown in FIG. 2 is performed, and the epoxy resin is packaged under the same comparison to compare the light extraction efficiency. The invention has a specific segment matching index package of 15.35 lumens, and the prior art epoxy package has 12.88 lumens, so the specific segment wavelength matching index package has a luminous flux gain of 19.2% (calculated as: (15.35-12.88) ÷ 12.88×100% =19.2%), that is, the light extraction efficiency increased by 19.2%.

Example 2: Multi-segment wavelength encapsulating material composition is described as follows: Composition represents the formula [(Rn) _(1-a) + (Mna) _a ] = RM √ nx, starting material: Rn resin composite to contain YAG -Ce ⁺ fluorescent agent 8 wt% epoxy resin 90.25 wt%. Mna: 55.65 nm ZrO ₂ additive 1.25 wt%; 97.6 nm SiO ₂ additive 0.5 wt%. The implementation steps are as shown in Figure 1:

1. Metal zirconia (degussa ZrO ₂ ) starting source material 1-1, using ethyl acetate as an surfactant, using MEK butanone as a solvent, placing in a bead mill 1-2 grinding process, using a particle size distribution meter After measurement, the particle size peak Peak was distributed at a center of 55.65 nm for use.

2. Repeat the above procedure, SiO _{2 was} ground by a bead mill 1-2, and measured by a particle size distribution meter to obtain a particle size peak, which was distributed around 97.6 nm.

3. Epoxy resin (1-3) 90.25 wt%; 55.65 nm ZrO ₂ 1.25 wt% and 97.6 nm SiO ₂ 0.5 wt%, co-distributed into mixing tank 1-4 mixed dispersion processing.

4. Take the sample curing to 2 × 6 × 30 mm, and measure the light reflectance and the refractive index of 1-5 at 450 nm, which are the predetermined values in Table 4 and the reflection spectrum chart 7.

5. The semi-finished product of step 3 is added to the YAG 8 wt% and placed in the mixing tank 1-4 to be mixed and dispersed, which is the finished product 1-6, and the specific white light multi-segment matching packaging material composition. (Note: must be mixed with the phosphor material after the matching packaging material QC)

The composition completed in Example 2 had a wavelength of ?=450 nm and a refractive index of 2.6 for the light-emitting diode, and a refractive index of 1.82 for the fluorescent agent _a = 570 nm. For the package demand matching refractive index √ 2.6 = 1.61, and the matching refractive index √ 1.82 = 1.35 two segments of the refractive index, as shown in Table 6. Thereby, the following effects can be achieved:

1. Increasing efficiency of the phosphor: Since the segment wavelength?=450nm matches the crystal material of the light-emitting diode, according to the refractive index theorem, √2.6=1.61, the refractive index can match the crystal of the light-emitting diode. The light emitted by the self-luminous diode can enter the fluorescent powder to participate in the reaction, so the fluorescent agent has high efficiency.

2, the light extraction efficiency is good: due to the segment wavelength? _a 570nm fluorescent agent refractive index matching √1.82 = 1.35, so that the fluorescent agent stimulates the light reflectivity is low, and easy to export into the air medium, so reduce the light reflection back to the fire Light agent, good light output

3, can be mixed into a very uniform white light: because the wavelength ? = 450nm and the wavelength ? _a = 570nm fluorescence complementary, and light travels between the nano particles, will play a diffusion function due to scattering, so can be mixed into a very uniform White light, as shown in Figure 3.

The above is only an embodiment of the present invention, which can be derived from a wide range of applications, and because of the simple structure, the multiplication of production efficiency can also take into account the production cost, and has industrial utilization value, which is the same as the technical idea of the present invention. Simple conversion or equivalent conversion is within the scope of the patent of the present invention.

1-1. . . Metal oxide or metal composite oxide

1-2. . . Bead mill processing

1-3. . . Resin or resin composite

1-4. . . Mixed processing

1-5. . . QC detection

1-6. . . Matching refractive index material composition

2-1. . . Light-emitting diode grain

2-2. . . Resin

2-3. . . Light-emitting diode wavelength optical thickness D nanoparticle

2-4. . . Matched refractive index encapsulating material

2-5. . . Fluorescent agent

2-6. . . White light matching refractive index encapsulating material composition

2-7. . . Fluorescent agent wavelength D nanoparticle

2-8. . . Second layer of phosphor package material composition

2-9. . . First layer LED package material composition

3-1. . . 1/4? maximal reflectance

3-2. . . 1/4? minimal reflectivity

Rn. . . Resin or its composite material and its refractive index

Mna. . . Metal oxide or composite material and its refractive index

a. . . Proportion of metal oxides or their composites

1-a. . . Resin ratio

n _x . . . Luminescent diode (LED) material refractive index

n _s . . . Substrate refractive index

√n _x . . . Composition matching refractive index

RM. . . combination

λ. . . Light-emitting diode (LED) grain emission wavelength

λ _a . . . Fluorescent agent wavelength

D. . . Optical thickness particle size

R. . . Reflectivity

Rs. . . Substrate reflectivity

Figure 1: Production process

Figure 2: Schematic diagram of a specific segment wavelength LED package

Figure 3: Schematic diagram of a specific multi-segment wavelength white light emitting diode package

Figure 4: Optical thickness D = λ / 4n optical path diagram

Table 1: Differences between the present invention and prior art

Table 2: Luminescent Diode Grain and Material Refractive Index

Table 3: Relationship between temperature and lifetime of light-emitting diode

Table 4: Example data

Table 5: Reflectivity of the package composition

Table 6: Nanoparticle size distribution

Table 7: Reflectance of white light encapsulating composition

Table 8: Section reflectivity

2-1. . . Light-emitting diode grain

2-2. . . Resin

2-3. . . Light-emitting diode wavelength optical thickness D nanoparticle

2-4. . . Matched refractive index encapsulating material

Claims (23)

An encapsulating material composition having a specific segment wavelength matching refractive index, wherein the encapsulating material composition is in the range of a light source wavelength of a light emitting diode or a fluorescent agent, and the method comprises: an additive, a metal oxide or composite metal oxide nanoparticle, wherein the particle size of the additive segment is 1/4 times the wavelength of the light source, and the refractive index of the additive is divided by the optical thickness particle size range (D) =λ/(4×n), where D is the segment particle diameter, λ is the wavelength of the light source, n is the refractive index of the additive; and a binder is a resin material; the binder is reacted with the additive After mixing, an encapsulating material composition having a specific segment matching refractive index is formed. The package material composition having a specific segment wavelength matching refractive index as described in claim 1, wherein the segment refractive index additive is in the range of D=λ/4n optical thickness particle size and size, and may be one or The particle sizes of one or more different segments are simultaneously added to form one or more wavelength multi-segment additives. An encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 2, wherein the metal oxide is Ti, Zn, Al, Mg, Nb, Sn, Zr, Ce, Ta, La, Hf , Si or In, a metal oxide nanoparticle corresponding to the wavelength particle size distribution, which is approximately equal to an odd-fold optical thickness range of 1/4 wavelength. An encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 3, wherein the metal oxide has a particle size corresponding to the light emitted by the light emitting diode or the fluorescent agent. The optical thickness of the wavelength is in the range of 0.01% to 8% by weight, and is used as a segment wavelength refractive index adjusting additive. The encapsulating material composition having a specific segment wavelength matching refractive index according to claim 2, wherein the specific multi-segment wavelength of the light emitting diode is between 360 and 490 nm, and includes red and green. a blue or a plurality of phosphor wavelength segments, the resin is added with a plurality of segments corresponding to the nanoparticle composition of the wavelength, and matched with the ultraviolet multi-region refractive index as a specific multi-segment white light A wavelength-matching refractive index encapsulating material composition. An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 2, wherein the light emitting diode has a specific multi-segment wavelength of a bluish light, the light source is between 400 and 490 nm, and includes a a yellow phosphor wavelength section in which a plurality of segments corresponding to each of the wavelength nanoparticle particles are added to match a broad blue multi-segment refractive index as a packaging material for a specific multi-segment white light wavelength matching refractive index Composition. An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 2, wherein the light-emitting diode has a specific segment wavelength of between 400 and 490 nm and includes green and red wavelengths. a phosphor component segment in which a plurality of segments corresponding to each of the wavelength nanoparticle particles are added to match a broad blue multi-segment refractive index as a package material composition for a specific multi-segment white light wavelength matching refractive index . An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 2, wherein the luminescent diode has a specific segment wavelength of between 400 and 490 nm and includes blue and green And a red wavelength phosphor section, wherein a plurality of segments corresponding to each of the wavelength nanoparticle particles are added to the resin to match the broad blue multi-region refractive index, and the package is a specific multi-segment white light wavelength matching refractive index package. Material composition. An encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 1 wherein the resin material comprises an epoxy resin, an anthrone resin, UREA, PMMA, PC, PI or a composite thereof. It is a binder between nanoparticles and nanoparticles. An encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 1, wherein the composite metal oxide is Ti, Zn, Mg, Al, Nb, Sn, Zr, Ce, Ta, La, Hf, Si, Al, In or a composite metal oxide synthesized by two or more kinds, and a nanoparticle corresponding to a wavelength particle size distribution and an odd-numbered optical thickness composite metal oxide segment of about 1/4 wavelength is added as The segments match the refractive index additive. An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 10, wherein the particle size of the segment of the composite metal oxide is corresponding to the light emitting diode or fluorescent light The optical thickness of the wavelength at which the agent emits is in the range of 0.01% to 8% by weight, and is used as a segment wavelength refractive index adjusting additive. An encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 10, wherein the matching specific phosphor segment matching refractive index material composition comprises emitting light emitting diodes and phosphors The wavelength is a segment, and nano particles corresponding to the respective particle diameters are added as a plurality of segments matching the specific fluorescence and the wavelength of the light-emitting diode while matching the refractive index material composition. The encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 12, wherein the inorganic fluorescent agent may be YAG:Ce ⁺ , YAG:Td ⁺ , YAG-Nd ⁺ , YAG-TAG , SrGa ₂ S ₄ :Eu ⁺ , Sr ₂ Si ₅ N ₈ :Eu ⁺ , SrS:Eu ⁺ , SrGa ₂ S ₄ :Eu ⁺ , Ba ₃ Si ₆ O12N ₂ :Eu ⁺ , CaAlSiN ₃ :Eu ⁺ or more Mixing, and using the wavelength of the wavelength of the phosphor, adding nano particles corresponding to the wavelength of the phosphor to the resin, and adding the phosphor to be a specific fluorescent segment matching Refractive index material composition. An encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 1, wherein the light emitting diode infrared (IR) specific segment wavelength is between 750 and 1050 nm, and the resin is added The composition of the nanoparticle corresponding to the wavelength section is matched to the refractive index of the infrared light section as a specific infrared light section wavelength matching refractive index encapsulating material composition. An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 1, wherein the red light specific segment wavelength of the light emitting diode is between 620 and 750 nm, and the corresponding wavelength region is added to the resin. The composition of the segment of nanoparticles is matched to the red light segment refractive index as a specific red light segment wavelength matching refractive index encapsulating material composition. The encapsulating material composition having a specific segment wavelength matching refractive index according to claim 1, wherein the specific wavelength of the orange light of the light emitting diode is between 592 and 620 nm, and the corresponding wavelength is added to the resin. The composition of the segmented nanoparticles matches the refractive index of the orange light segment as a specific orange light segment wavelength matching refractive index encapsulating material composition. The encapsulating material composition having a specific segment wavelength matching refractive index according to claim 1, wherein the specific wavelength of the yellow light of the light emitting diode is between 578 and 592 nm, and the corresponding wavelength is added to the resin. The composition of the segmented nanoparticles is matched to the refractive index of the yellow light segment as a specific yellow light segment wavelength matching refractive index encapsulating material composition. An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 1, wherein the specific wavelength of the green light of the light emitting diode is between 513 and 578 nm, and the corresponding wavelength is added to the resin. The composition of the segmented nanoparticles matches the refractive index of the green light segment as a specific green light segment wavelength matching refractive index encapsulating material composition. The encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 1, wherein the specific wavelength of the light-emitting diode blue-green light is between 500 and 513 nm, and the resin is added correspondingly. The composition of the nanoparticles of the wavelength section is matched to the refractive index of the blue-green light segment as a specific blue-green optical segment wavelength matching refractive index encapsulating material composition. The encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 1 is characterized in that the specific wavelength of the blue light of the light emitting diode is between 464 and 500 nm, and the corresponding wavelength region is added to the resin. The composition of the segment of nanoparticles matches the refractive index of the green light segment as a specific blue light segment wavelength matching refractive index encapsulating material composition. An encapsulating material composition having a specific segment wavelength matching refractive index according to claim 1, wherein the specific wavelength of the dark blue light of the light emitting diode is between 446 and 464 nm, and the corresponding wavelength is added to the resin. The composition of the segmented nanoparticles matches the refractive index of the deep blue light segment as a specific deep blue light segment wavelength matching refractive index encapsulating material composition. The encapsulating material composition having a specific segment wavelength matching refractive index as described in claim 1 is characterized in that the specific wavelength of the violet light of the light emitting diode is between 400 and 446 nm, and the corresponding wavelength region is added to the resin. The composition of the segment of nanoparticles is matched to the refractive index of the violet light segment as a specific purple light segment wavelength matching refractive index encapsulating material composition. The encapsulating material composition having a specific segment wavelength matching refractive index according to claim 1, wherein the specific wavelength of the ultraviolet light of the light emitting diode is between 360 and 400 nm, and the resin is added correspondingly. The composition of the nanoparticles of the wavelength section is matched to the refractive index of the ultraviolet light section as a specific ultraviolet light section wavelength matching refractive index encapsulating material composition.