KR20000036312A - Semiconductor light emitting devices and arrays for plant germination - Google Patents
Semiconductor light emitting devices and arrays for plant germination Download PDFInfo
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Abstract
Description
본 발명은 반도체 발광소자를 이용한 식물 씨앗발아 및 성장에서의 광형태 발생학적인 형성 및 촉진에 관여되는 특정 파장으로 구성된 바이오 광소자(Bio-LED) 및 광소자로 이루어진 에레이(array) 모듈(module)을 제조하는 방법에 관한 것으로 효과적인 광형태반응을 제어하기 위한 바이오 광소자 제작방법에 관한 것이다. 식물의 광형태 반응은 청색, 적색, 원적 색의 460, 666, 730 nm의 파장에서 서로 다른 특성을 나타낸다. 생화학적인 파이토크롬(Phytochrome)의 염색체(chromophore)가 조사되는 광 파장에 따라 달라지기 때문이다. 도 1에서처럼 적색광 조사로 파이토크롬 레드(Pr) 형태가 파이토크롬 파레드(Pfr)의 형태로 변하고, 원적색광을 조사하면 반전하게 된다. 도 2는 파이토크롬의 스펙트럼 파장에 따른 흡수특성을 나타낸 개략도이다. 적색광효과는 666 nm주위에 위치하고 원적색광 효과는 730 nm 주위에서 식물효소 반응이 일어난다. 만일 적색을 조사하면 콩알이 발아되어, 떡잎에서 잎이 발현하지만 다시 원적색을 이어서 조사하면 잎을 되말리는 발아억제 현상을 일으키게 된다. 도 3은 콩잎의 조사광 파장에 따른 발아현상을 나타낸다. 도 3A는 암실 내에서의 발아된 콩이고, 도 3B는 적색광을 2분간 조사한 콩의 발아이며, 도 3C는 도 3B를 이어서 5분간 원적색광을 조사한 경우의 발아이며, 또한 도 3D는 원적색광만을 5분간 조사한 후의 발아된 콩을 나타낸다. 이러한 현상은 장미꽃잎을 적절히 시장출하기에 맞추어 꽃봉오리를 조절하려 할 때에도 유효하다. 한편 청색을 조사하면 줄기는 크지 않고 콩잎이 매우 왕성하게 발현되도록 하는 적색광 파이토크롬(Pr)의 상승작용을 한다. 따라서 조사광의 파장을 적절히 조절함으로써 광형태발생뿐 만 아니라 관엽식물의 병충해 저항성과 맛까지도 조절할 수 있게 되어 농업분야에 매우 유용한 바이오 광소자제작이 권장되고 있다.The present invention relates to a bio-LED and an array module composed of optical devices having a specific wavelength involved in optical morphogenetic formation and promotion in plant seed germination and growth using semiconductor light emitting devices. The present invention relates to a method for manufacturing a bio-optical device for controlling an effective photoform reaction. The photomorphic response of plants exhibits different characteristics at wavelengths of 460, 666 and 730 nm in blue, red and primary colors. This is because the biochemical phytochrome chromophore depends on the wavelength of light being irradiated. As shown in FIG. 1, the form of phytochrome red (Pr) is changed to form of phytochrome pared (Pfr) by red light irradiation, and is inverted when the primary red light is irradiated. Figure 2 is a schematic diagram showing the absorption characteristics according to the spectral wavelength of phytochrome. The red light effect is around 666 nm and the far red light effect is the plant enzyme reaction around 730 nm. If red light is irradiated, soybean germinates, and leaves are expressed in cotyledons, but if red color is irradiated again, it causes germination inhibition to dry the leaves. Figure 3 shows the germination phenomenon according to the irradiation light wavelength of the soybean leaves. FIG. 3A is a germinated bean in a dark room, FIG. 3B is a germination of a bean irradiated with red light for 2 minutes, FIG. 3C is a germination when irradiated with red light for 5 minutes following FIG. 3B, and FIG. 3D is only a far red light. Germinated soybeans after irradiation for 5 minutes are shown. This phenomenon is also effective when trying to control the buds to properly market the rose petals. On the other hand, when irradiated with blue, the stem is not large and the synergistic effect of red light phytochrome (Pr) to make the soybean leaves very vigorous expression. Therefore, by controlling the wavelength of the irradiation light properly, not only the generation of the light form but also the pest resistance and taste of the houseplants can be controlled, which is why the production of bio-optical devices which is very useful for the agricultural field is recommended.
현재 실용화 단계에 있는 광형태반응 재료로는 도 4와 같은 칼라 플라스틱 필터를 이용하여 백색형광등을 선택적으로 차단 및 통과시켜 특정 파장영역의 광을 조사하는 경우이다. 이러한 칼라필터는 공업용으로 제작은 용이하지만, 식물의 광형태반응의 460, 666, 730 nm의 특수 파장만 갖는 광원필터로는 제작이 어렵고 서로 중첩되어지며, 열에 의한 변색이 되기 쉽다. 이러한 문제점으로 인해 광 형태 반응제어가 용이하지 못하여 첨단농업기술로는 발전되지 못하고 있는 실정이다.The photoform reaction material in the practical use stage is a case of irradiating light of a specific wavelength region by selectively blocking and passing a white fluorescent lamp using a color plastic filter as shown in FIG. 4. Although such color filters are easy to manufacture for industrial use, light source filters having only special wavelengths of 460, 666, and 730 nm of the photoform reaction of plants are difficult to produce, overlap each other, and are easily discolored by heat. Due to these problems, it is not easy to control the optical form reaction, so that the advanced agricultural technology is not developed.
따라서 이러한 종래의 칼라필터로는 매우 광범위한 농업응용성을 갖는 광 형태 발생기구를 구현하는데는 한계가 따르고, 매우 좁은 반치폭의 스펙트럼 분포를 갖는 반도체 발광소자를 이용한 자동화된 디지털방식의 광조사 제어방식이 구현됨으로써 종묘발아의 균일성 및 효율성이 있는 선진 농업기법이 절실히 필요한 형편이다.Therefore, such a conventional color filter has a limitation in implementing a light type generating mechanism having a wide range of agricultural applications, and an automated digital light irradiation control method using a semiconductor light emitting device having a very narrow half-width spectrum distribution The implementation of advanced agricultural techniques with uniformity and efficiency of seed germination is urgently needed.
본 발명은 상기한 종래의 기술적인 문제를 감안한 것으로, 본 발명의 목적은 종묘발아용 반도체 발광 소자를 청색광, 적색광 원적색광을 발광할 수 있는 반도체 광소자재료를 이용하여 칩을 제작, 리드 프레임에 3개의 3색 발광 칩을 조합하여 3색광 단일램프를 어레이 형태로 디스플레이 하는 모듈과 단일 칩을 단일 램프로 제작하여 3 종류의 램프를 조합하여 순차적 모자이크 배치방식의 모듈 제작의 방법을 제공하는데 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional technical problems, and an object of the present invention is to fabricate a chip using a semiconductor optical device material capable of emitting blue light and red light far red light for a seed germination semiconductor light emitting device. The present invention provides a method of manufacturing a module of a sequential mosaic arrangement method by combining three types of lamps by combining a three-color light emitting chip to display a three-color single lamp in an array form and a single chip as a single lamp.
이러한 목적을 달성하는데 있어, 본 발명에 따른 반도체 바이오 광소자의 칩은 청색의 경우, 질화물반도체를 이용하여 발광 활성층의 물질로 InGaN을 이용한다. 청색발광소자의 구조는 더블헤테로구조나 양자우물형 구조를 유기금속화학증착장치(MOCVD)로 형성하게 된다. 기판을 절연체인 사파이어 결정을 사용하기 때문에 전극을 모두 박막표면 상부 쪽에 형성하게 된다. 적색 및 원적색의 경우는 AlGaAs 반도체를 액상증착장비(LPE)로 GaAs 기판위에 성장시켜 제작하게 되며, 구조는 더블헤테로구조로 Al성분을 조절하게 되며, 적색은 35%, 원적색은 15% 정도의 화학조성을 갖는다. 기판은 GaAs반도체이기 때문에 전극을 상하 양쪽에 형성할 수 있다. 이러한 개별 칩을 리드 프레임에 조립할 때에 단색광이나 2원색 또는 3원색을 발광하도록 제작하며, 램프의 발광 각도를 조절하여 조사광의 분포를 균일하게 설계함으로써, 모듈화된 디스플레이의 종묘발아 광원을 제작하는 것을 특징으로 한다.In achieving the above object, the chip of the semiconductor bio-optical device according to the present invention uses InGaN as the material of the light emitting active layer using a nitride semiconductor in the case of blue. The blue light emitting device has a double hetero structure or a quantum well type structure by organometallic chemical vapor deposition (MOCVD). Since the substrate uses sapphire crystal as an insulator, all electrodes are formed on the upper surface of the thin film surface. In the case of red and primary red, AlGaAs semiconductor is grown on the GaAs substrate by liquid vapor deposition (LPE), and the structure is double hetero structure to control Al component, red is 35%, and red is about 15%. It has a chemical composition of. Since the substrate is a GaAs semiconductor, the electrodes can be formed on both the upper and lower sides. When the individual chips are assembled into the lead frame, monochromatic light, two primary colors or three primary colors are emitted, and the light emitting angle of the lamp is controlled to uniformly distribute the irradiation light, thereby producing seedling germination light sources of the modular display. It is done.
도 1은 조사광 파장에 따른 파이토크롬의 분자결합 상태에 대한 변환도.1 is a conversion diagram for the molecular binding state of phytochrome according to the irradiation light wavelength.
도 2는 파이토크롬의 파장에 따른 광흡수를 나타내는 스펙트럼 개략도.2 is a spectral schematic diagram showing light absorption according to the wavelength of phytochrome.
도 3은 조사광 파장에 따른 콩나물의 발아 상태에 대한 개략도.3 is a schematic diagram of the germination state of the bean sprouts according to the irradiation light wavelength.
도 4는 종래의 백색형광등을 이용한 색필터 광원스펙트럼 개략도.Figure 4 is a schematic view of the color filter light source spectrum using a conventional white fluorescent lamp.
도 5는 본 발명에서 3색광이 한 개의 리드프레임에 포함된 발광다이오드 램프에 대한 단면도.5 is a cross-sectional view of a light emitting diode lamp in which three colors of light are included in one lead frame in the present invention.
도 6은 도 5의 3색광 발광다이오드가 내는 스펙트럼의 규격화된 세기에 대한 개략도6 is a schematic diagram of the normalized intensity of the spectrum emitted by the tricolor light emitting diode of FIG.
도 7은 본 발명에서 3색광의 발광램프를 이용한 조명 어레이의 회로배선도7 is a circuit wiring diagram of an illumination array using light emitting lamps of three colors in the present invention.
도 8은 본 발명에서 단일광의 발광램프를 이용한 광원 어레이 모듈에 대한 개략도.8 is a schematic view of a light source array module using a light emitting lamp of a single light in the present invention.
도 9는 본 발명에서 단일광의 발광램프 어레이의 회로배선도.9 is a circuit wiring diagram of a single light emitting lamp array in the present invention.
〈도면주요 부위에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1. epoxy수지 2. 골드 와이어1. epoxy resin 2. gold wire
3. 금속전극 4. 청색광 양의 전극3. Metal electrode 4. Blue light positive electrode
5. 리드 플레임(접지) 6. 실버 페이스트(Ag paste)5. Lead flame (grounding) 6. Silver paste
7. 청색 LED 칩 8. 적색 LED 칩7. Blue LED Chip 8. Red LED Chip
9. 원적색 LED 칩 10. 인쇄회로기판9. Far red LED chip 10. Printed circuit board
11. 케이블 커넥터 12. LED 램프11.cable connector 12.LED lamp
13. 데이터 구동회로 14. 스캔 구동회로13. Data driving circuit 14. Scan driving circuit
본 발명의 바람직한 실시 예를 첨부 도면에 의거하여 상세히 설명하기로 한다.Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
이 바람직한 실시 예를 통해 본 발명의 목적, 특징 및 이점을 보다 잘 이해할 수 있게 된다. 이하, 첨부한 도면을 참조하여 본 발명에 의한 종묘발아용 반도체 발광 소자 및 어레이 제작방법의 바람직한 실시 예를 상세히 설명하기로 한다.Through this preferred embodiment, it is possible to better understand the objects, features and advantages of the present invention. Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the seed light germination semiconductor light emitting device and the array manufacturing method according to the present invention.
제 1실시 예로 도 5과 같은 형상으로 리드 프레임위에 청색 LED칩(7), 적색 LED칩(8), 원적색 LED칩(9)을 실버페이스트(6)위에 안착시키고 리드 플레임에 각각 골드 와이어를 본딩시킨다. 공통접지선(5)과 각각 파장별 LED칩의 양의 전극리드선 을 분리 도출되도록 에폭시수지로 봉입하여 조립한다. 또한 에폭시수지의 렌즈부위는 가능한 한 빛이 발산되도록 기존의 집광 표시기용에서 사용되는 볼록렌즈형태대신 오목렌즈형태로 설계하였다. 리드프레임의 컵(cup) 형태도 집광 각도를 60°이상으로 크게 함으로써 조명용 램프형태를 갖는다.In a first embodiment, a blue LED chip 7, a red LED chip 8, and a far red LED chip 9 are mounted on a silver paste 6 on a lead frame in a shape as shown in FIG. 5, and a gold wire is placed on the lead frame, respectively. Bond. The common ground wire (5) and the positive electrode lead wire of each LED chip for each wavelength are sealed and assembled with epoxy resin so as to be separated. In addition, the lens part of the epoxy resin was designed in the form of concave lens instead of the convex lens type used in the conventional condensing indicator to emit light as much as possible. The cup form of the lead frame also has the form of an illumination lamp by increasing the condensing angle to 60 ° or more.
전광판과 같은 디스플레이용이 아니고, LED 램프를 조명용에 이용하는 경우는 렌즈를 오목렌즈 형태로 설계하여 균일한 발산이 되도록 하며 농업용 LED 뿐만 아니라 조명용 백색 LED에서도 동일하게 적용된다. 또한 램프의 형태를 원기둥형이나 사각기둥 형태로 몰딩이 가능하며 조명 어레이에 응용 가능하다.If the LED lamp is used for lighting, rather than a display such as an electronic board, the lens is designed in the form of a concave lens so as to have a uniform divergence, and the same applies to not only agricultural LED but also white LED for lighting. In addition, the shape of the lamp can be molded in the form of a cylinder or a square column, and can be applied to the lighting array.
도 6은 3색광 LED 가 내는 파장별 스펙트럼의 규격화된 세기를 나타낸다. InGaN 양자우물구조에서 발광하는 청색은 460 nm, AlGaAs 더블헤테로 구조에서 발광하는 적색은 666 nm, 원적색은 730 nm이다. 이러한 색의 조합은 디지털 신호처리로 선택적으로 선별하거나 조합시킬 수 있다.Figure 6 shows the normalized intensity of the wavelength-specific spectrum emitted by the tri-color LED. The blue light emitted from the InGaN quantum well structure is 460 nm, the red light emitted from the AlGaAs double hetero structure is 666 nm, and the primary red is 730 nm. These color combinations can be selectively selected or combined by digital signal processing.
도 7는 3색광 LED램프를 이용한 조명 어레이 형태의 평면도 및 측면도를 나타낸다. LED램프를 인쇄 회로기판에 정렬시킨 후, 용융상태의 납땜용액에 담근 다음 몰딩한다. 케이블로 전자제어용 회로기판과 연결하여 신호 처리할 수 있도록 어레이모듈을 커넥터에 연결한다.7 shows a plan view and side view of an illumination array form using a tricolor light LED lamp. After aligning the LED lamp to the printed circuit board, immersed in the molten solder solution and molded. The array module is connected to the connector so that the cable can be connected to the electronic control circuit board for signal processing.
제 2실시 예는 단일파장을 발광하는 청색, 적색, 원적색 LED램프를 각각 리드 프레임에 독립적으로 제조한 후 어레이형태로 순차적 모자이크 배치방식으로 조합하는 경우이다. 규칙적으로 색을 배열하여 3색광이 선별적으로 사용될 수 있거나 동시에 점등될 수 있도록 신호처리가 가능하다. 도 8은 배열된 어레이의 정면도와 측면도를 나타낸다. 이러한 어레이 모듈을 구동회로에 연결하여 제작된 형태를 도 9에 나타내었다. 복잡한 전광판 디스플레이용 모듈보다는 매우 간단하여 시간제어 및 광량의 제어형태로서 단순한 형태이다.The second embodiment is a case in which blue, red, and far red LED lamps emitting a single wavelength are independently manufactured in a lead frame, and then combined in a sequential mosaic arrangement in an array form. By arranging the colors regularly, the signal processing is possible so that three colors of light can be selectively used or simultaneously lit. 8 shows a front view and a side view of an array arranged. 9 illustrates a form manufactured by connecting the array module to the driving circuit. It is much simpler than the complicated display board module, and is a simple form of time control and light quantity control.
또한, 본 발명이 당업자에 의해 다양하게 변형되어 실시될 가능성이 있는 것은 자명하며 종묘발아장치의 광원으로 국한되지 않는 광형태 발생론적 원천기술을 포함한다.In addition, it is apparent that the present invention may be variously modified and implemented by those skilled in the art, and includes a photomorphologic source technology that is not limited to the light source of the seedling germination device.
이와 같은 변형된 실시 예들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어져서는 안되며, 이와 같은 변형된 실시 예들은 본 발명의 첨부된 특허청구범위 안에 속한다 해야 할 것이다.Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.
상술한 설명으로부터, 본 발명에 따른 종묘발아 농업용 반도체 발광 소자 및 어레이의 제조방법은 3색광을 같은 LED램프에 3개의 청색, 적색, 원적색 LED칩을 삽입한 형태를 단순 배열하는 어레이나 단 일색 LED램프 3종류를 모자이크형태로 규칙 배열하는 어레이를 제조하는 방법에 관한 것으로서 종래의 형광등에 칼라필터를 사용하는 농업용 광원보다 광량과 파장의 제어가 용이하고 종묘발아장치내의 열 발생이 적어 온도 및 습도 조절이 양호할 뿐만 아니라 절전효과가 매우 우수하여 차세대 원천 농업기술로서의 가치가 크다. 또한 식물 광형태발생 반응제어에 우수한 신뢰성을 확보할 수 있고 고휘도 발광효율의 효과를 제공한다.From the above description, the method for manufacturing a seedling germination agricultural semiconductor light emitting device and array according to the present invention is an array or single color in which the three blue, red and primary red LED chips are simply arranged in the same LED lamp. The present invention relates to a method of manufacturing an array of mosaic arrangements of three types of LED lamps in a mosaic form, which is easier to control light quantity and wavelength than an agricultural light source using a color filter in a conventional fluorescent lamp, and generates less heat in the seedling germination device. Not only good control but also very good power-saving effect, it is very valuable as next generation source agricultural technology. In addition, it is possible to secure excellent reliability in controlling plant photomorphogenesis reaction and provide an effect of high luminance luminous efficiency.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100625720B1 (en) * | 2002-09-05 | 2006-09-20 | 니치아 카가쿠 고교 가부시키가이샤 | Semiconductor device and optical device using the semiconductor device |
| WO2007078091A1 (en) * | 2005-12-30 | 2007-07-12 | Seoul Semiconductor Co., Ltd. | Light emitting apparatus |
| KR100765712B1 (en) * | 2006-02-06 | 2007-10-11 | 엘지전자 주식회사 | Light emitting device package and method of manufacturing the same |
| US8911160B2 (en) | 2005-09-27 | 2014-12-16 | Lg Electronics Inc. | Light emitting device package and backlight unit using the same |
| US9351355B2 (en) | 2005-12-30 | 2016-05-24 | Seoul Semiconductor Co., Ltd. | Illumination system having color temperature control and method for controlling the same |
-
2000
- 2000-01-04 KR KR1020000000108A patent/KR20000036312A/en active IP Right Grant
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100625720B1 (en) * | 2002-09-05 | 2006-09-20 | 니치아 카가쿠 고교 가부시키가이샤 | Semiconductor device and optical device using the semiconductor device |
| US8911160B2 (en) | 2005-09-27 | 2014-12-16 | Lg Electronics Inc. | Light emitting device package and backlight unit using the same |
| US8961043B2 (en) | 2005-09-27 | 2015-02-24 | Lg Electronics Inc. | Light emitting device package and backlight unit using the same |
| US9285632B2 (en) | 2005-09-27 | 2016-03-15 | Lg Electronics Inc. | Light emitting device package and backlight unit using the same |
| US9880416B2 (en) | 2005-09-27 | 2018-01-30 | Lg Electronics Inc. | Light emitting device package and backlight unit using the same |
| WO2007078091A1 (en) * | 2005-12-30 | 2007-07-12 | Seoul Semiconductor Co., Ltd. | Light emitting apparatus |
| US8282238B2 (en) | 2005-12-30 | 2012-10-09 | Seoul Semiconductor Co., Ltd. | Light emitting apparatus including independently driven light emitting portions |
| US9351355B2 (en) | 2005-12-30 | 2016-05-24 | Seoul Semiconductor Co., Ltd. | Illumination system having color temperature control and method for controlling the same |
| KR100765712B1 (en) * | 2006-02-06 | 2007-10-11 | 엘지전자 주식회사 | Light emitting device package and method of manufacturing the same |
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