TWI228321B - LED structure and manufacturing method - Google Patents

Abstract

A LED structure and its manufacturing method are provided. The light emitting material (for example, fluorescence powder or phosphorescence powder) and nana-scale (for example, 1 to 500 nm) composite inorganic powder are mixed into an encapsulation (for example, epoxy resin) to form a mixer. The mixer is coated or deposited on a LED chip surface and periphery, and then the light emitting material in the mixer can be stimulated by the LED-generated UV photons to generate visible light. The composite inorganic material floating in the encapsulation can reflect the remaining UV photons that don't stimulate the light emitting material to let them have chances to re-stimulate the light-emitting material during the reflection process and generate the visible light. Therefore, the invented mixer can let the UV photons emitted from the LED chip adequately react with the light emitting material, so that more bright visible light is emitted on the LED chip surface and periphery, and the UV light is greatly reduced.

Description

1228321

[Technical field to which the invention belongs] The present invention relates to a light-emitting method which can not only reduce the light-emitting diode grains or avoid the situation that the ultraviolet rays generated by the light-emitting diodes are on the human body. A manufacturing method of a polar body, the manufacturer emits brighter white light, and can directly radiate photons' to the outside, irradiating [prior art] Light Eniitting Diode (hereinafter referred to as LED), which is a kind of semiconductor The components made of materials are collected by Min Yuan and Wu Yi, because they can convert electrical energy into light, so they belong to a fine solid-state light source. They not only have small size, long life, low driving voltage, and fast response rate. It has excellent shock resistance, and can meet the design requirements of light, thin, short, and small. It is widely used in various products in Japan. 0 $ & There are many types of light-emitting diodes. According to their light-emitting wavelengths, they can be roughly divided into two types: visible light and invisible light. The light-emitting diodes of visible light are mainly used for display purposes, and the brightness is 1 candle ( Cd) As the demarcation point between general LEDs and high-brightness LEDs, general leds are widely used in various types of indoor display products, and high-brightness LEDs are suitable for outdoor display, such as: the third brake lights of automobiles, Outdoor signage and traffic signs =. As for invisible light LEDs, such as infrared LEDs, they are used in appliances such as remote controls for household appliances, factory automatic detection, photocopy paper size detection, automatic doors, and automatic flushing device control. At the end of the month, the production and application of UV light emitting diodes (UV LEDs) with a wavelength of 350 ~ 400nm is rapidly developing. This type of light emitting diode is mainly used to generate ultraviolet light

1228321 月 月 修修 _ Case No. 92105348 V. Description of the invention (2) Photons' excite the fluorescent or light-filled powder coated thereon to convert ultraviolet light into visible light of different colors, and adjust red, Green, blue glorious or phosphorescent powders are formulated to produce white light under appropriate proportions. As far as current technology is concerned, white light-emitting diodes derived from ultraviolet light-emitting diodes have reached a party level of 60 lm / W, and it is estimated that in 2010, $ 'will reach 100 lm / W ~ 120 lm / W 'Therefore, with the advantage of 120 lm / W brightness, white light-emitting diodes will have a good opportunity to replace fluorescent lamps (with a brightness of about 120 lm / W) and incandescent lamps (with a brightness of about 120 θ10lm / W), as the star of tomorrow for indoor and outdoor lighting. White light emitting diodes have small size, low heat generation (no thermal radiation), low power consumption (low voltage and low current start), long life (more than 10,000 hours), and fast response speed (can be South frequency operation), strong financial impact, good environmental compatibility (recyclable waste, no pollution) and flat packaging (light, thin and short) and other advantages' except in the field of lighting, such as: portable flashlights, Indicators, backlight sources, and other devices are expected to be widely used in automobiles, indoor and outdoor lighting, etc. in the next ten years. Because white LEDs used for lighting have more than five times the life of current light sources, they can replace the current Fluorescent tubes, and fully solve the mercury-containing environmental protection problem of waste lamps. 0 Check 'Ultra-violet light can be classified as A-ray (U1 (U1 (U1 can be resurfaced, traviolet-A rays, hereinafter referred to as UVa), B There are three types of traviolet-β rays (hereinafter referred to as 11 ") and c-ray traviolet-C rays (hereinafter referred to as uvc). Among them, UVA is subdivided into long-wave UVA and short-wave UVA. UVC rarely falls to the ground. Only UVA UVB will affect us. The medical

Page 6 1228321 — Case No. 92105348 Amended on May. 5, V. Description of the Invention (3) Immediate exposure to UVA and UVB can not only make the skin red, black, peeling, or itchy. Right long-term exposure to UVA and UVB It will make the skin gradually dry, and will cause skin pigmentation and freckles. In addition, the skin's metabolism will also slow down. And the gradually accumulated dead skin will make the skin rough and cause gum loss. Causes skin to lose elasticity, sagging, aging, or wrinkles, and increases the chance of skin cancer. Press' Using ultraviolet light to excite the fluorescent or phosphorescent powder as one of the white light emitting diodes. However, the particle size of the fluorescent or structuring powder coated on the light emitting diode is only about 2 〇micron, therefore, the ultraviolet photons produced by the diode are often leaked out before the fluorescent or phosphorescent powder is excited, and the leaked UV light wavelength is 35 ～ 4〇11111 coincidentally Within the range of UVA wave # (32 ~ 400nm), because the UVA band of ultraviolet light has been proven to cause the skin aging and skin cancer, especially the cumulative effects of the most terrible effects. Therefore, if precautions are not taken in advance, when white light-emitting diodes are commonly used in daily life, human skin will be seriously injured by being constantly exposed to the UVA band of ultraviolet light. Therefore, how to develop a light-emitting diode crystal that can emit brighter white light and reduce or prevent it from radiating UV photons to prevent UV light from directly causing damage to human skin is currently urgent. An important issue. [Summary of the Invention] In view of the many shortcomings of the aforementioned traditional white light-emitting diodes, the inventor finally developed and designed a light-emitting device of the present invention after long-term research and experiment.

Page 7 1228321 Case No. 92105348

V. Description of the invention (4) The structure of the diode and the manufacturing method thereof, and it is expected that the light emitting diode with high uniformity and no ultraviolet light pollution will be produced by the present invention. One object of the present invention is to hope that the ultraviolet photons emitted by the light-emitting diode grains can fully interact with the phosphor powder or phosphor powder coated thereon, so as to avoid unacted ultraviolet photons directly. Irradiate to a large extent, and cause harm to human skin. Its main technology is to mix nano-scale composite inorganic powder into the colloid mouth with fluorescent powder or phosphorescent powder uniformly to form a mixture. Coated or plated on a light-emitting diode grain '俾 The ultraviolet photons generated by the light-emitting diode grain can excite the fluorescent powder or phosphorescent powder to generate visible light, and the mixture is suspended in The composite inorganic powder in the colloid can reflect the remaining ultraviolet photons that do not directly excite the luminescent material, and give it the opportunity to 'excite the luminescent material again during the reflection process to generate visible light. Therefore, the mixture of the present invention can make the ultraviolet photons scattered by the light-emitting diode grains sufficiently interact with the light-emitting material to emit on the surface of the light-emitting diode grains or around the light-emitting diode grains. Brighter white light, and greatly reduce the production of ultraviolet light to prevent human skin from being damaged by ultraviolet light. The review committee is hereby able to further understand and understand the purpose, shape, structural device features, and functions of the present invention. The following examples are given in conjunction with the illustrations, and their implementation is as follows: [Embodiment] The present invention is a kind of For the structure of the light-emitting diode and its manufacturing method, please refer to FIG. 1 'It is a combination of the light-emitting material 2 and nanometer-scale (nanometer (nm) composite inorganic powder 1) materials uniformly and uniformly. Mixed into a colloid

1228321 __Case No. 92105348_ Amendment Date ___ V. Description of the invention (5) 3 'formed a mixture, and the mixture was coated or plated on or around the surface of a light-emitting diode die 4 The light-emitting material 2 in the mixture can be excited by the ultraviolet photons 5 generated by the light-emitting diode grains 4 to generate visible light, and the composite inorganic powder 1 suspended in the colloid 3 in the mixture. It can reflect the remaining ultraviolet photons 5 that cannot directly excite the luminescent material 2 and give it the opportunity to excite the luminescent material 2 ′ again to generate visible light during the reflection process. Since the mixture of the present invention can make the ultraviolet photons 5 scattered by the light-emitting diode crystal grains 4 fully interact with the light-emitting material 2, 'the light-emitting diode crystal can be made by the present invention The surface of the particle 4 emits brighter white light on or around it, and the leakage of ultraviolet light is greatly reduced to prevent the human skin from being damaged by the ultraviolet light. In the present invention, please refer to FIG. 1. Each of the composite inorganic powders 1 includes at least one inorganic powder (such as zinc oxide, titanium dioxide, etc.), and at least one insulating oxide 丨 2 (such as: Silicon dioxide, aluminum oxide, etc.) 'These inorganic powders 11 are nanometer-sized (the particle size is between 50 nm, but 5 to 200 nm is the best), and is exposed to ultraviolet light. Free-moving electrons and holes can be decomposed under irradiation. As for these insulating oxides, 'the scale is smaller (the particle size is between 0 and 50 nm, but it is covered by M5 · as the best system. The surface of each of the inorganic powders 1. mi Of course, why must the surface of each inorganic powder 11 be covered with the insulating and chemical compounds 12? The inorganic powders are exposed to ultraviolet light The latter can be divided into electrons and holes that can move freely. In this case, it will cause the organic matter of the colloid 3 to undergo an oxidation reaction and deteriorate. Therefore, the present invention is applicable to inorganic powder U (such as : Zinc oxide, titanium dioxide, etc.) ::

Case No. 92105348 1228321 on page 9 Amendment V. Description of the invention (6) The 'recovering insulating oxides 1 2 (such as: stone dioxide, dioxide, etc.) with a smaller scale will effectively reduce the The inorganic powder 11 decomposes the number of electrons and holes that can move freely. It has been mentioned in the text that the mixture is coated or plated on or around the "surface" of a light-emitting diode die 4, meaning that the mixture can not only be directly coated or plated on a light-emitting diode On the surface of the body die 4, if the light-emitting diode die 4 is packaged in a plastic case (the technology of how the light-emitting diode die 4 is packaged is not the focus of this patent, so here it is When it is not necessary to add more details), the mixture may also be coated or plated on the plastic shell, and the light-emitting material 2 in the mixture may be excited by the ultraviolet photons $ generated by the light-emitting diode grains 4 To produce visible light. In the present invention, please refer to FIG. 丨. The composite inorganic powder can be mainly zinc oxide, titanium oxide, or magnesium oxide, kaolin, sulfuric acid, or: stone powder ... It can also be a mixture containing compounds such as zinc oxide, L2, dimagnesium, Shangling clay, calcium sulfate, and talc according to -d b = a. In a preferred embodiment of the present invention, : Mixed SI is a combination of oxidation and dioxin and IK: The scope of the rights claimed by this person is not limited to this, as per familiar ^ ren 钲; ί According to the technical content disclosed in the present invention, Use of other titanium oxide, or dioxide: ii: use of zinc oxide and two ^^ Λ,.,. 'Rolled magnesium and amphibious clay, or calcium sulfate and talc

物 a-Emulsified titanium and talc ... 箄 servant 铷 ^, human L example, mixed people and #, · compound, a mixture of a certain combination ratio ° are all deducted in the following invention, Said into the thing. Medium, and the coating diameter is small, and when mixed into the mixture ~ L and "a polar crystal grain 4, it can appear colorless and transparent

Page 10 1228321 --- tlfe 92105348_ ^ Yue Yue Amendment V. Invention Description (7 ^ " '-" Sadness' to effectively reflect ultraviolet photons and make at least 85% or more of visible light photons penetrate the mixture Features. In the present invention, please refer to FIG. 1 again. The composition of the luminescent material 2 may be a fluorescent powder or a phosphorescent powder, wherein the color of the fluorescent powder or the phosphorescent powder may include Red, green, and blue, or blue and yellow, or any light or phosphorescent powder that can be excited by the ultraviolet photon 5 to produce white light. As for the composition of the colloid 3, it is透明 / ¾ 5 inorganic powder and the transparent gluing material of the light-emitting material uniformly bonded together, such as: epoxy resin (£ 1) 0} ^ Resin). 'In a preferred embodiment of the present invention, please refer to FIG. 1 and FIG. 2. According to the experimental results of the inventor, it is known that if a nano-scale (eg, 1 to 500 nm) composite inorganic powder is used 丨 ( For example, zinc oxide is covered with silicon dioxide or titanium dioxide is covered with sulphur trioxide.) Its particle size is small. Therefore, when it is mixed into the mixture and coated on the light-emitting diode grains 4, it is colorless. Transparent state to effectively reflect ultraviolet photons 5 and allow approximately π% of visible light photons to pass through (as shown in Figure 2); however, if a larger micron-scale composite inorganic powder 1 is used, Poor transparency will cause the brightness of the light-emitting diode crystal grains 4 to decay. Therefore, there is a certain relative relationship between the "particle size of the composite inorganic powder 1" and "brightness". Therefore, in order to achieve the best effect, the composite inorganic powder 1, the luminescent material 2 and the colloid 3 can be prepared according to the following steps and a certain mixing ratio, please refer to FIG. 3 to make the mixture of the present invention. : (101) First, a composite inorganic powder 1 (such as zinc oxide, titanium dioxide) having a nanometer scale (1 to 500 nm) of 1 to 40 wt% (weight percentage), and a luminescent material 2 of 1 to 40 wt% ( (Such as: fluorescent powder or filling powder)

1228321 __Case No. 92105348_year Λ-L 佟 丨 τ__ V. Description of the invention (8) In 20-98wt% of colloid 3 (such as epoxy resin); (1 02) The composite inorganic powder 1 1. The luminescent material 2 and the colloid 3 are uniformly mixed into a mixture; (103) Finally, according to the actual needs, 'take the appropriate amount of the mixture and coat it on or around the surface of the luminescent diode grains 4, Then, the light-emitting diode structure of the present invention can be formed. By following the above steps and a certain mixing ratio, the mixture can be made colorless and transparent, and about 85% (as shown in Figures 1 and 2) of visible light photons can pass through and can effectively reflect ultraviolet photons. 5 Therefore, this structure can not only make the light emitting diode grains 4 emit brighter white light, but also reduce or avoid the phenomenon that the ultraviolet photons 5 generated by the light emitting diodes are directly radiated to the human skin. … A factory, 丨 inverse… 丨 one of the specific examples of the best product in Hungary, the manufacturing steps and structural characteristics of the present invention are not limited to this, according to Z, those skilled in the art are in the field of the invention, According to the technical content disclosed by the present invention :: Other compounds that can be easily considered (such as: quick-drying gel, branch hardener, two-diffusion agent, anti-settling agent) can be included in the patent scope of the following case. , 1228321 _Case No. 92105348_ 年月 日 __ Brief Description of Drawings [Simplified Description of Drawings] Figure 1 is a schematic plan view of the present invention. Figure 2 is a graph of the transmission ratio and wavelength of the composite inorganic powder of the present invention. Relationship diagram. Figure 3 is the manufacturing flow chart of the present invention. [Explanation of Symbols of Main Components] Composite Inorganic Powder ............ 1 Luminescent Material .............. .2 Colloids .............. 3 Light-Emitting Diode Grain ... 4 UV Photon ............... 5 Inorganic powder ............ 11 Insulating oxide ............ 12

Page 13

Claims (1)

1228321 correction A structure of a light-emitting diode. The main material of the light-emitting diode includes two light-emitting materials, a nanometer-scale composite inorganic powder, and a colloidal dioxin. The composite inorganic powder includes at least one inorganic material. Powder and L-type insulating oxides. These inorganic powders are nanometer-sized, and can decompose freely moving electrons and holes under external light irradiation. The marginal oxide 'has a smaller size than each of the inorganic powders, and covers the surface of each of the inorganic powders. 2. A method for manufacturing a light-emitting diode. The main material of the light-emitting diode includes a light-emitting material, a nanometer-scale composite inorganic powder, and a colloid. The manufacturing method includes the following steps: First, the composite Inorganic powder and the luminescent material are added to a colloid respectively; 嗣 'The composite inorganic powder, the luminescent material and the colloid are evenly mixed into a mixture; finally' According to actual needs, take an appropriate amount of the mixture, apply Cloth or plated on or around the surface of light-emitting diode grains; 俟 After the mixture is coated or plated on or around the surface of light-emitting diode grains, the light-emitting material in the mixture may be The ultraviolet photons generated by the light-emitting diode grains are excited to generate visible light, and the composite inorganic powder in which the mixture is suspended in the colloid can reflect the remaining ultraviolet photons that cannot directly excite the light-emitting material, and It gives it the opportunity to excite the luminescent material again during the reflection process to produce visible light. 3. The structure as described in item 1 of the scope of the patent application, wherein the particle size of the composite inorganic powder is small and is mixed into the colloid and coated on a light-emitting Page 14 1228321 ____ Case No. 92105348 Amendment Date 6. When applied to the scope of patent application, polar crystals can appear colorless and transparent, and can effectively reflect ultraviolet photons, allowing about 85% of visible light photons to penetrate Of characteristics. 4. The structure according to item 1 in the scope of Shenqing patent, wherein the particle size of the inorganic powder is about 50 nm. 5. The structure described in item 1 of the scope of the patent application, wherein the particle size of each of the insulating oxides is about a nanometer scale of 50 nm. 6. The manufacturing method as described in item 2 of the scope of patent application, wherein the mixing ratio of the composite inorganic powder is about 40 wt%. The structure described in item 1 of the scope of patent application, wherein the composition of the luminescent material may be a fluorescent powder. 8. The structure according to item 丨 in the scope of patent application, wherein the composition of the light-emitting material may be phosphorescent powder. "9. The structure as described in item 7 or 8 of the scope of patent application, wherein the components of the luminescent material are made by mixing the fluorescent powder and the light-constructing powder with each other in a certain proportion. 1 0. The manufacturing method described in item 2 of the patent scope, wherein the mixing ratio of the matte material is about 40% by weight., =, The structure described in item i of the scope of patent application, wherein the gum system can make the composite inorganic The powder and the light-emitting material are uniformly glued together with a transparent glue material... 12. The manufacturing method as claimed in the patent application, wherein the mixing ratio of the glue is about 20-98wt%. Page 15