CN101382274A - LED flat light source structure for illuminating - Google Patents

LED flat light source structure for illuminating Download PDF

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Publication number
CN101382274A
CN101382274A CNA2007101213594A CN200710121359A CN101382274A CN 101382274 A CN101382274 A CN 101382274A CN A2007101213594 A CNA2007101213594 A CN A2007101213594A CN 200710121359 A CN200710121359 A CN 200710121359A CN 101382274 A CN101382274 A CN 101382274A
Authority
CN
China
Prior art keywords
led
light source
lamp box
source structure
heat spreader
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2007101213594A
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Chinese (zh)
Inventor
范曼宁
梁萌
王国宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Semiconductors of CAS
Original Assignee
Institute of Semiconductors of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Semiconductors of CAS filed Critical Institute of Semiconductors of CAS
Priority to CNA2007101213594A priority Critical patent/CN101382274A/en
Publication of CN101382274A publication Critical patent/CN101382274A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an LED planar light source structure which is used for illumination and characterized by comprising following components: a lamp case, which is a case body with a top opening; an LED array with two-dimensional distribution, which is arranged inside the case body of the lamp case; a transparent cover board, which is platy, covers on the LED array with two-dimensional distribution and takes the same shape with the lamp case; and a plurality of radiating structures, which take strip or platy shapes and are arranged under the lamp case.

Description

The LED flat light source structure that is used to throw light on
Technical field
The present invention relates to a kind of LED planar light source device, especially a kind of LED flat light source structure that is used for functions such as back lighting, plant culture illumination.
Background technology
Electric source lighting has experienced three important development stage, and the representative light source in this three phases is respectively incandescent lamp, fluorescent lamp and high-intensity gas discharge lamp.People generally believe that led light source is expected to develop into emerging light source product of the 4th generation now.The planar light source that adopts multiple compound mode to form plurality of LEDs, have advantages such as luminosity is big, good directionality, caloric value is low, reaction speed is easy to adjust soon, and has huge superiority at aspects such as power consumption, life-span and environmental protection, become the main product in the illuminating product, be widely used in aspects such as lamp lighting, outdoor advertising lamp box, LCD backlight source as multiple light emitting source.
Present plant culture lighting source adopts fluorescent tube more, but the heat of its luminous generation can cause tissue culture flasks interior overheated, has influence on the growth of cultivating seedling easily, so the improvement of must being dispelled the heat in addition.Constantly there is people's research and utilization LED to be used as cultivating light source now, because LED is a cold light source, can not damage the cultivation seedling, thus can control simultaneously with plant improve the space utilization rate near distance, so the LED planar light source also begins to occupy a tiny space in the agricultural cultivation field.The utility model is to be starting point with the volume production, the lighting of the plant culture special use of designing.
Summary of the invention
The object of the present invention is to provide a kind of LED flat light source structure that is used to throw light on, it is with the plant culture lighting device of light emitting diode as light source, to overcome the wayward defective of temperature that has used light sources such as fluorescent tube now.
To achieve these goals, the invention provides a kind of LED flat light source structure that is used to throw light on, it is characterized in that, comprising:
One lamp box, this lamp box are open-topped box body;
The led array that one two dimension is arranged, this two dimension led array is produced in the box body of lamp box;
One transparent cover plate is one tabular, and this transparent cover plate is covered on the led array that two dimension arranges, and the shape of this transparent cover plate is identical with lamp box;
A plurality of heat spreader structures, these a plurality of heat spreader structures are strip or tabular, these a plurality of heat spreader structures be installed in lamp box below.
The led array that wherein said two dimension is arranged is evenly to be arranged on the pcb board and to be constituted by most ruddiness, blue-ray LEDs.
A wherein said majority ruddiness, blue-ray LED are that to adopt the red-light LED wavelength be 660nm, and the blue-ray LED wavelength is 450nm, deviation range at 5nm with interior LED.
Wherein said transparent cover plate is the transparent material that adopts glass plate or resin plate.
The one or both ends of wherein said a plurality of heat spreader structures are equipped with fan.
Outside coating one deck insulated paint of wherein said a plurality of heat spreader structures.
Beneficial effect of the present invention is: because the present invention's employing is low power LED of all kinds, luminous efficiency is higher, make that the optical uniformity effect is better, can evenly distributed bright dipping on the support inner bottom surface, help improving the mixed light light intensity and the uniformity thereof, it is more thinner to make that lamp house thickness can design; Because LED is welded on the pcb board that is beneficial to heat radiation, and this aluminium base closely contact is in the inner bottom of the lamp box that adopts aluminum alloy frame, the heat spreader structures of subsidiary radiator fan simultaneously helps realizing the efficiently radiates heat of led light source plate.
Description of drawings
For further specifying concrete technology contents of the present invention, below in conjunction with embodiment and accompanying drawing describes in detail as after, wherein:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the sketch of arranging of led light source in the present invention's one instantiation.
Fig. 3 is the present invention's electrical block diagram of the present invention.
The specific embodiment
See also Fig. 1, shown in Figure 2, a kind of LED flat light source structure that is used to throw light on of the present invention comprises:
One lamp box 1, this lamp box 1 is open-topped box body;
The led array 2 that one two dimension is arranged, this two dimension led array 2 is produced in the box body of lamp box 1, the led array 2 that this two dimension is arranged is evenly to be arranged on the pcb board and to be constituted by most ruddiness, blue-ray LEDs 21, a wherein said majority ruddiness, blue-ray LED 21 are that employing red-light LED wavelength is 660nm, the blue-ray LED wavelength is 450nm, deviation range at 5nm with interior LED;
One transparent cover plate 3 is one tabular, and this transparent cover plate 3 is covered on the led array 2 that two dimension arranges, and the shape of this transparent cover plate 3 is identical with lamp box 1, and this transparent cover plate 3 is the transparent materials that adopt glass plate or resin plate;
A plurality of heat spreader structures 4, these a plurality of heat spreader structures 4 are strip or tabular, these a plurality of heat spreader structures 4 be installed in lamp box 1 below, the one or both ends of these a plurality of heat spreader structures 4 are equipped with fan 41; Outside coating one deck insulated paint of these a plurality of heat spreader structures 4.
Please consult Fig. 1 and Fig. 2 again, the present invention relates to a kind of LED flat light source structure, and be the light illumination structure that can be used for functions such as back lighting, plant culture illumination.As shown in Figure 1, it comprises a lamp box 1, and this lamp box 1 is the box body that a bottom is inconjunction with the top end opening of heat spreader structures 4, and it is the supporting construction of an employing aluminium alloy or other metals, and outside coating one deck insulated paint; The led array 2 that one two dimension is arranged, this two dimension led array 2 adopts the LED mixed light of particular color, and evenly be arranged on the pcb board according to certain compound mode, and but pcb board is to adopt the radiating effect aluminium base circuit board of two-layer wiring preferably, and it is screwed on lamp house supporting rack 1 inner bottom surface.Led array can adopt different capacity, versicolor LED to arrange and realize even bright dipping; The transparent cover plate 3 of one subsidiary metal edge frame, this transparent cover plate 3 can adopt transparent configurations such as glass plate or resin plate, and it is placed on the led array top, and can be fixed on the top of lamp house supporting rack 1; One is installed in the heat spreader structures 4 of lamp house supporting rack rear side, and it comprises laterally or the heat radiating fin structure of vertically arranging and the fan heat radiation group device 41 of auxiliary heat dissipation, to reach the purpose of efficiently radiates heat.Can add optics modules such as attached prism plate, astigmatism plate on the top of lamp box 1 and obtain different light efficiencies according to the needs of the light intensity and the light uniformity in addition.
In order to make this flat light source structure in efficient lighting area, reach higher luminous power illumination index, it is lighting source that the present invention can adopt the higher low power LED of luminous efficiency of all kinds, evenly distributed in the lamp box inner bottom surface, make that the light-emitting uniformity effect is better, help simultaneously improving the mixed light light intensity, make more thinner that lamp house thickness can design; The circuit that is fixed on the pcb board of this lamp box supporting construction inside has adopted intensive arrangement mode, drive circuit and circuit of light sources unification are designed on the aluminum base PCB plate, effectively utilize the space, to reduce a large amount of lines, and the Lights section and drive part are kept apart with a baffle plate, make the Lights section space independent, can improve light utilization efficiency simultaneously, to increase the irradiation level value.And described light emitting diode of all kinds is according to the difference of number, and various LED arrange with certain interlaced hybrid mode, in order to reach preferably evenly light output effect.
For the purpose that the illuminance that reaches higher brightness distributes, the LED quantity of employing is more and arrangement is tightr, so need to adopt effective radiating mode in time the heat that light source led produces to be dissipated.The heat sink pin of each LED lamp of the led array 2 that this two dimension is arranged closely is welded on the pcb board of good heat radiating, this pcb board closely is fixed on the inner bottom of lamp box 1 by the screw knob, the related heat spreader structures 4 of lamp box external bottom end, it comprises heat radiating fin structure horizontal or that vertically arrange and is installed in the fan heat radiation group device 41 of fin one or both ends in order to auxiliary heat dissipation, the heat that makes led array 2 produce can effectively dissipate by heat spreader structures, to reach better radiating effect, temperature maintenance is below LED lamp normal working temperature, and LED can be normally luminous.Can add optics modules such as attached prism plate, astigmatism plate on the top of lamp box 1 and obtain different light efficiencies as required in addition.
This flat light source structure adopts Switching Power Supply direct current supply, and the constant current drive mode that adopts components and parts relatively to simplify drives LED of all kinds respectively.Constant-current drive circuit is stabilized in operating current in the scope of current value 20-30mA of light emitting diode operate as normal, and external power source adopts Switching Power Supply control, and the high voltage supply (consulting Fig. 3) of direct current 100V-200V is provided.
See also shown in Figure 1ly, be the present invention's one specific embodiment.The invention provides a kind of LED flat light source structure that is used for the plant culture illumination.It comprises a lamp box 1, and the glass cover plate 3, of the redness that two dimension is arranged, blue LED arrays 2, one subsidiary frames is installed in the heat spreader structures 4 of lamp box external bottom end.Wherein, this lamp box 1 is the box body that a bottom is inconjunction with the top end opening of heat spreader structures 4, this heat spreader structures 4 comprises by the assembled fin device of aluminium sheet, and at the fan heat sink 41 of fin one side, the heat that can be produced led array 2 at work timely and effectively dissipates; This two dimension redness, blue LED arrays 2 evenly are arranged on the bottom surface of lamp box 1 inside according to certain hybrid mode; This glass cover plate 3 is placed on the led array top, and is installed in the top of lamp box 1 by screw.
Embodiment
For the illumination index that realizes the planar light source plate reaches ruddiness 35W/m 2, blue light 10W/m 2Purpose, the present invention adopts that the higher small-power of light efficiency is red, blue LED is lighting source, the efficient lighting area of each lamp box is 290mm * 540mm, be fixed on and be welded with 2916 of the red-light LEDs that wavelength is 660nm on the aluminum base PCB plate of this lamp box inside, wavelength is 324 of the blue-ray LEDs of 450nm, and described ruddiness, blue light diode are according to the difference of number, the red-light LED of blue-ray LED and some is arranged with interlaced hybrid mode, as shown in Figure 2, in order to reach uniform light output.When lamp box reached the state of operate as normal, measured data was that the irradiation level of red-light LED light source when temperature is 43 ℃ of left and right sides is 35W/m 2About; The irradiation level of blue-ray LED light source when temperature is 43 ℃ of left and right sides is 11W/m 2About; The lamp box operate as normal is 46W/m at the whole irradiation level of 43 ℃ of left and right sides generation 2About, outgoing light homogeneity can reach more than 80%.
For the purpose that the illuminance that reaches higher brightness distributes, the LED quantity of employing is more and arrangement is tightr, so need to adopt effective radiating mode in time the heat that light source led produces to be dissipated.The heat sink pin of each LED lamp of the led array 2 that this two dimension is arranged closely is welded on the aluminum base PCB plate of good heat radiating, this aluminum base PCB plate closely is fixed on the inner bottom of lamp box 1, the related heat spreader structures 4 of lamp box external bottom end, and the fin rear side is equipped with fan heat radiation group 41, the heat that led array 2 is produced can effectively dissipate by the bottom surface radiator structure, makes temperature maintenance below LED lamp normal working temperature.When lamp box reached operate as normal, the measured data of serviceability temperature sensor remained on about 43 ℃.
This flat light source structure adopts Switching Power Supply direct current supply, and the constant current drive mode that adopts components and parts relatively to simplify drives red, blue-ray LED respectively.Wherein the DC voltage about 175V is used in the power supply of red-light LED power supply, and constant-current drive circuit is stabilized in the operating current of red-light LED about 20mA, makes that LED can operate as normal; The DC voltage about 155V is used in the power supply power supply of blue-ray LED, and constant-current drive circuit is stabilized in the operating current of blue-ray LED about 30mA, makes that LED can operate as normal.
More than be particular content of the present invention, the structural change of the equivalence of doing according to the principle of the invention all should be included in the claim of the present invention.

Claims (6)

1. a LED flat light source structure that is used to throw light on is characterized in that, comprising:
One lamp box, this lamp box are open-topped box body;
The led array that one two dimension is arranged, this two dimension led array is produced in the box body of lamp box;
One transparent cover plate is one tabular, and this transparent cover plate is covered on the led array that two dimension arranges, and the shape of this transparent cover plate is identical with lamp box;
A plurality of heat spreader structures, these a plurality of heat spreader structures are strip or tabular, these a plurality of heat spreader structures be installed in lamp box below.
2. the LED flat light source structure that is used to throw light on as claimed in claim 1 is characterized in that, the led array that wherein said two dimension is arranged is evenly to be arranged on the pcb board and to be constituted by most ruddiness, blue-ray LEDs.
3. the LED flat light source structure that is used to throw light on as claimed in claim 2 is characterized in that, a wherein said majority ruddiness, blue-ray LED are that to adopt the red-light LED wavelength be 660nm, and the blue-ray LED wavelength is 450nm, deviation range at 5nm with interior LED.
4. the LED flat light source structure that is used to throw light on as claimed in claim 1 is characterized in that, wherein said transparent cover plate is the transparent material that adopts glass plate or resin plate.
5. the LED flat light source structure that is used to throw light on as claimed in claim 1 is characterized in that the one or both ends of wherein said a plurality of heat spreader structures are equipped with fan.
6. as claim 1 or the 5 described LED flat light source structures that are used to throw light on, it is characterized in that outside coating one deck insulated paint of wherein said a plurality of heat spreader structures.
CNA2007101213594A 2007-09-05 2007-09-05 LED flat light source structure for illuminating Pending CN101382274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2007101213594A CN101382274A (en) 2007-09-05 2007-09-05 LED flat light source structure for illuminating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007101213594A CN101382274A (en) 2007-09-05 2007-09-05 LED flat light source structure for illuminating

Publications (1)

Publication Number Publication Date
CN101382274A true CN101382274A (en) 2009-03-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007101213594A Pending CN101382274A (en) 2007-09-05 2007-09-05 LED flat light source structure for illuminating

Country Status (1)

Country Link
CN (1) CN101382274A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022675A (en) * 2010-10-28 2011-04-20 复旦大学 Light-emitting diode (LED) illumination device for plant cultivation
CN102510639A (en) * 2011-07-19 2012-06-20 东日出市 Led lighting device
CN103322472A (en) * 2013-06-04 2013-09-25 中山市迪克力照明电器有限公司 High-voltage AC IC illuminating lamp
CN102122467B (en) * 2010-01-11 2014-01-29 钟群 Ultra-thin advertising lamp box with LED (light emitting diode) as light source
CN105276552A (en) * 2014-07-18 2016-01-27 豪雅冠得股份有限公司 Light irradiation apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102122467B (en) * 2010-01-11 2014-01-29 钟群 Ultra-thin advertising lamp box with LED (light emitting diode) as light source
CN102022675A (en) * 2010-10-28 2011-04-20 复旦大学 Light-emitting diode (LED) illumination device for plant cultivation
CN102510639A (en) * 2011-07-19 2012-06-20 东日出市 Led lighting device
CN102510639B (en) * 2011-07-19 2014-11-05 东日出市 LED lighting device
CN103322472A (en) * 2013-06-04 2013-09-25 中山市迪克力照明电器有限公司 High-voltage AC IC illuminating lamp
CN105276552A (en) * 2014-07-18 2016-01-27 豪雅冠得股份有限公司 Light irradiation apparatus
CN105276552B (en) * 2014-07-18 2020-08-04 豪雅冠得股份有限公司 Light irradiation device

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Open date: 20090311