CN102313156A - LED (Light Emitting Diode) planar light source - Google Patents

LED (Light Emitting Diode) planar light source Download PDF

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Publication number
CN102313156A
CN102313156A CN2010102183352A CN201010218335A CN102313156A CN 102313156 A CN102313156 A CN 102313156A CN 2010102183352 A CN2010102183352 A CN 2010102183352A CN 201010218335 A CN201010218335 A CN 201010218335A CN 102313156 A CN102313156 A CN 102313156A
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led
light
radiating substrate
light source
heat
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CN2010102183352A
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CN102313156B (en
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周明杰
马文波
陈贵堂
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Abstract

The invention discloses an LED (Light Emitting Diode) planar light source, which comprises a radiating substrate, a light guide device, an LED light emitting body and fluorescent powder, wherein the radiating substrate is hollow and blocky; the hollow part of the radiating substrate is provided with the light guide device of which the shape of the outer wall is adapted to the inner side wall of the radiating substrate; the LED light emitting body is arranged on the inner side wall of the radiating substrate; and the fluorescent powder is coated on the surface of the light guide device or is dispersed in the light guide device. A mode that the fluorescent powder coated on the surface of the light guide device or the fluorescent powder dispersed in the interior is excited by using the light emitted by the LED light emitting body is adopted, the original point light source light emitting mode is substituted, the uniformity of the light source is improved, and high visual adaptability is guaranteed; meanwhile, the LED light emitting body is arranged on the inner side wall of the radiating substrate, the light emitted by the LED light emitting body excites the fluorescent powder to emit light through the light guide device; and composite light is simultaneously emitted through a first emergent face and a second emergent face, so that the loss of the light is reduced and the light emitting efficiency of the light source is increased.

Description

The LED planar light source
[technical field]
The present invention relates to a kind of LED planar light source.
[background technology]
Led light source has low in energy consumption, the characteristics of long service life.At present, the light efficiency of powerful white light LEDs has reached 1001m/W, and the light efficiency of stabilized products also has 901m/W, but the LED spot light has the characteristics of uneven illumination, vision adaptive difference.Event need increase secondary optics design even repeatedly optical design on led light source planar light source device solves above-mentioned shortcoming to increase.Method commonly used at present is on led array, to cover LGP or irreflexive transparent material etc., but these methods can cause the utilization rate of light to descend.
[summary of the invention]
Based on this, be necessary to provide a kind of ability can overcome uneven illumination, can improve the LED planar light source of the utilization rate of light again.
A kind of LED planar light source; Comprise heat-radiating substrate, guiding device, LED illuminator, fluorescent material; Said heat-radiating substrate is the bulk of hollow; Be provided with the adaptive guiding device of madial wall of outer wall shape and said heat-radiating substrate at the hollow space of said heat-radiating substrate, said LED illuminator is arranged on the madial wall of said heat-radiating substrate, said fluorescent material coated said guiding device surface or to be dispersed in said guiding device inner.
In a preferred embodiment; Also comprise and be the first tabular support portion of hollow and second support portion; Said first support portion and said second support portion are radially extended to form to axis direction by the two ends of said heat-radiating substrate, and said guiding device places between said first support portion and second support portion.
In a preferred embodiment, the outer wall of said heat-radiating substrate is axially arranged with the fins group that outward radial extends.
In a preferred embodiment, the material of said heat-radiating substrate is the good conductor of heat.
In a preferred embodiment, said guiding device side applies the reflection of light film, and radially offers light trough that the size with the LED illuminator adapts with ccontaining LED illuminator.
In a preferred embodiment, the light wavelength sent less than said fluorescent material of the light wavelength sent of said LED illuminator.
In a preferred embodiment, the light wavelength sent of said LED illuminator is below 490nm.
In a preferred embodiment, said LED illuminator is blue light emitting body or purple light illuminator.
In a preferred embodiment, the luminous energy that sends of the light that sends of said fluorescent material and LED illuminator is combined into white light.
In a preferred embodiment, said fluorescent material can be single fluorescent material of planting, and also can be two or more single mixture of planting fluorescent material.
Above-mentioned LED planar light source excites the pattern of the light-emitting phosphor that guiding device surface applied fluorescent material or inner disperses to be provided with through the light that adopts the LED illuminator to send; Substituted the pattern of original point light source light-emitting; Improved the uniformity of light source, had good vision adaptive, the LED illuminator is arranged at the madial wall of hot substrate simultaneously; Excitated fluorescent powder was luminous when the light that the LED illuminator sends passed through guiding device; Combining light has reduced the loss of light through first exiting surface and the outgoing simultaneously of second exiting surface, has improved the light emission rate of light source.
[description of drawings]
Fig. 1 is the LED planar light source schematic diagram of an embodiment;
Fig. 2 is the side view of fluorescent powder coated mode embodiment one;
Fig. 3 is the side view of fluorescent powder coated mode embodiment two;
Fig. 4 is the side view of fluorescent powder coated mode embodiment three;
Fig. 5 is the side view of fluorescent powder coated mode embodiment four.
[specific embodiment]
As shown in Figure 1, the LED planar light source comprises heat-radiating substrate 100, guiding device 200, fluorescent material 300, LED illuminator 400.Heat-radiating substrate 100 constitutes the cavity of taking in guiding device 200.Guiding device 200 places in the heat-radiating substrate 100.LED illuminator 400 place guiding device 200.Fluorescent material 300 applies through transparent glue and is fixed in guiding device 200 surfaces or is dispersed in guiding device 200 inside.
Heat-radiating substrate 100 is the bulk of hollow, and outer wall is axially arranged with fins group 120.Fins group 120 comprises the multi-disc fin, extends from the outer wall outward radial of heat-radiating substrate 100 to form.The design of fins group 120 can strengthen the surface area of heat-radiating substrate 100, improves heat exchanger effectiveness.Good conductor such as aluminium, copper, iron, alloy and the pottery etc. of the preferred heat of the material of heat-radiating substrate 100.
As shown in Figure 2, certain-length is radially extended to center position in the two ends of heat-radiating substrate 100, forms first gripper shoe 140 and second gripper shoe 160, with fixing total.Second gripper shoe 140 can be integral with heat-radiating substrate 100, also can be disconnected from each other.Guiding device 200 is axially disposed between first gripper shoe 140 and second gripper shoe 160.The length of radially extending in a preferred embodiment, is advisable to hide LED illuminator 400.The material of first gripper shoe 140 and second gripper shoe 160 can be for plastics, metal, also can be the material of other hard.The material of first gripper shoe 140 and second gripper shoe 160 can be identical materials, also can be material different.
Guiding device 200 is transparent cake, is arranged at the middle vacancy of heat-radiating substrate 100, the shape adaptation of the shape of its lateral wall and heat-radiating substrate 100 madial walls.As shown in Figure 2, the upper and lower end face of guiding device 200 is respectively first exiting surface 220 and second exiting surface 240.Parallel to each other and smooth between first exiting surface 220 and second exiting surface 240, its shape can be circular, square or other irregular shape.The sidewall of guiding device 200 is handled or smooth treatment through hair earlier; Be coated with the reflectance coating of visible light then; The sidewall of guiding device 200 is radially offered the light trough 260 that can hold the LED illuminator; Its size is adaptive with the LED illuminator 400 that is arranged on heat-radiating substrate 100 inwalls, and LED illuminator 400 light-emitting areas are towards light trough 260.The light that LED illuminator 400 sends is to all the winds propagated, and most light is directly outwards propagated through first exiting surface 220, second exiting surface 240 of guiding device 200, and fraction light is to the propagation of the side of guiding device 200.When not having reflectance coating; The light of this part will be absorbed by heat-radiating substrate 100, and after being provided with reflectance coating, this part light is adjusted the propagation path of light after the reflection of reflectance coating; Outwards propagate from first exiting surface 220 or second exiting surface 240, improved the exitance of light.The material of guiding device 200 can be Merlon (PMMA claims acrylic or lucite again), Merlon (PC), glass or other colourless transparent materials.
LED illuminator 400 can be the LED luminescence chip or the LED lamp of encapsulated moulding.The packing forms of LED lamp can be pinned, also can be for SMD.LED illuminator 400 is fastened in the light trough 260 of guiding device by the mode of light-emitting area towards guiding device 200, and non-light-emitting area (claiming the bottom surface again) links to each other with heat-radiating substrate 100.
Fluorescent material 300 applies through transparent glue and is fixed in guiding device 200 surfaces or is dispersed in guiding device 200 inside.The light that LED illuminator 400 is sent is when seeing through guiding device 200 and outwards propagate, and it is luminous that a part is used for being absorbed excitated fluorescent powders 300 by fluorescent material 300, and the light that remaining part is used for being sent with fluorescent material 300 is compound, produces mixed light.Relation according to wavelength and frequency, energy can know, the wavelength of the light that the wavelength of the light that LED illuminator 400 sends needs to be excited to send than fluorescent material is short, and enough energy excitation light-emitting phosphors are just arranged.Sort purple light＜blue light＜blue or green light＜green glow＜gold-tinted＜orange light＜ruddiness from small to large according to light wavelength.In a preferred embodiment, the light wavelength that LED illuminator 400 sends below 490nm, preferably, blue-ray LED, its light wavelength of sending is between 420～490nm; Purple LED, its light wavelength of sending is between 220～420nm.
Fluorescent material 300 is coated in guiding device 200 surfaces or is dispersed in guiding device 200 inside.Because fluorescent material 300 is the particle of continuous distributed, so fluorescent material 300 can also impel light evenly to distribute as the scattering point of light except being excited to emit beam.The mode that fluorescent material 300 applies has serigraphy, spraying, sedimentation or other mode.Transparent glue is used for the fluorescent material 300 that is coated in guiding device 200 surfaces is fixed on guiding device 200 surfaces, and its material can be 502 glue, silica gel, epoxy resin or other transparent glue.When adopting fluorescent material 300 to be dispersed in guiding device 200 inner modes, fluorescent material 300 does not just mix, stirs with its raw material during moulding at guiding device 200.After the moulding, be evenly distributed with fluorescent material 300 in the guiding device 200, do not need to fix through transparent glue in addition.To describe several kinds of application pattern of fluorescent material below: as shown in Figure 2 in embodiment one, guiding device 200 is a transparent integral body, and is fluorescent powder coated on first exiting surface of guiding device 200; In embodiment two, as shown in Figure 3, two guiding devices link to each other through the mode that exiting surface and exiting surface join, and fluorescent material 300 is coated on one of two exiting surfaces joining; In embodiment three, as shown in Figure 4, guiding device 200 is a transparent integral body, and fluorescent material 300 is coated on first and second exiting surface 220,240 of guiding device simultaneously; In embodiment four, as shown in Figure 5, guiding device 200 surfaces do not apply any fluorescent material 300, and fluorescent material 300 does not just mix, stirs with its raw material during moulding at guiding device 200.After the moulding, be evenly distributed with fluorescent material 300 in the guiding device 200.
Different LED illuminators 400 and different fluorescent material 300 make up, and can obtain the light of any color in theory.In one embodiment, LED illuminator 400 excitated fluorescent powders 300 compound generation white lights, as: blue-ray LED can excite yellow fluorescent powder, compoundly goes out white light; Blue-ray LED can be excitated red, the mixture of green emitting phosphor, compoundly goes out white light; Purple LED can be excitated red, green, the mixture of blue colour fluorescent powder, compoundly goes out white light.The terbium aluminium garnet that it is fluorescent material that the material of yellow fluorescent powder can be the yttrium-aluminium-garnet of mixing cerium, mix cerium is that fluorescent material, the rare-earth ion activated europkium-activated nitrogen of silicate systems fluorescent material, divalence (oxygen) are changed matter fluorescent powder etc.; The material of red fluorescence powder can be Y 2O 3: Eu 3+, Y 2O 3S:Eu 3+And rare-earth ion activated tungstates, molybdate, gallate, silicate, aluminate, vanadate, borate etc.; The material of green emitting phosphor can be CAS:Ce, Tb, ZnS:Cu, Al, Au, Y 2S iO 5: Ce, Tb, MgAl 11O 19: Ce, Tb, LaPO 4: Ce, Tb etc.; The material of blue colour fluorescent powder can be BaMg 2Al 16O 27: Eu 2+, BaMg Al 10O 17: Eu 2+, ZnS:Ag, CAS:Ce, BaAl 8O 13: Eu 2+Deng.
Above-mentioned LED planar light source excites the pattern of the light-emitting phosphor that guiding device surface applied fluorescent material or inner disperses to be provided with through the light that adopts the LED illuminator to send; Substituted the pattern of original point light source light-emitting; Improved the uniformity of light source, had good vision adaptive, the LED illuminator is arranged at the madial wall of heat-radiating substrate simultaneously; Excitated fluorescent powder was luminous when the light that the LED illuminator sends passed through guiding device; Combining light has reduced the loss of light through first exiting surface and the outgoing simultaneously of second exiting surface, has improved the light emission rate of light source.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.

Claims (10)

1. LED planar light source; It is characterized in that; Comprise heat-radiating substrate, guiding device, LED illuminator, fluorescent material, said heat-radiating substrate is the bulk of hollow, is provided with the adaptive guiding device of madial wall of outer wall shape and said heat-radiating substrate at the hollow space of said heat-radiating substrate; Said LED illuminator is arranged on the madial wall of said heat-radiating substrate, and is said fluorescent powder coated on said guiding device surface or to be dispersed in said guiding device inner.
2. LED planar light source as claimed in claim 1; It is characterized in that; Also comprise and be the first tabular support portion of hollow and second support portion; Said first support portion and said second support portion are radially extended to form to center position by the two ends of said heat-radiating substrate, and said guiding device places between said first support portion and second support portion.
3. LED planar light source as claimed in claim 1 is characterized in that, the outer wall of said heat-radiating substrate is axially arranged with the fins group that outward radial extends.
4. like claim 1,2 or 3 described LED planar light sources, the material of said heat-radiating substrate is the good conductor of heat.
5. LED planar light source as claimed in claim 1 is characterized in that, said guiding device side applies the reflection of light film, and radially offers light trough that the size with the LED illuminator adapts with ccontaining LED illuminator.
6. LED planar light source as claimed in claim 1 is characterized in that, the light wavelength that the light wavelength that said LED illuminator sends is sent less than said fluorescent material.
7. LED planar light source as claimed in claim 6 is characterized in that, the light wavelength that said LED illuminator sends is below 490nm.
8. LED planar light source as claimed in claim 7 is characterized in that, said LED illuminator is blue light emitting body or purple light illuminator.
9. LED planar light source as claimed in claim 1 is characterized in that, the luminous energy that light that said fluorescent material sends and LED illuminator send is combined into white light.
10. LED planar light source as claimed in claim 9 is characterized in that, said fluorescent material can be single fluorescent material of planting, and also can be two or more single mixture of planting fluorescent material.
CN2010102183352A 2010-07-02 2010-07-02 LED (Light Emitting Diode) planar light source Active CN102313156B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588796A (en) * 2012-03-02 2012-07-18 睿鸿光电科技(福建)有限公司 Fastened round LED lamp
CN103411146A (en) * 2013-08-10 2013-11-27 无锡市宝成塑胶科技有限公司 Light-emitting diode (LED) panel lamp
CN107850272A (en) * 2015-07-20 2018-03-27 飞利浦照明控股有限公司 Lighting apparatus with light guide
CN109983271A (en) * 2016-11-22 2019-07-05 昕诺飞控股有限公司 Lamp with floating light source
CN110645541A (en) * 2018-06-27 2020-01-03 深圳市绎立锐光科技开发有限公司 Light source device and vehicle lamp
JP2021047374A (en) * 2019-09-20 2021-03-25 セイコーエプソン株式会社 Wavelength conversion element, light source device and projector

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Publication number Priority date Publication date Assignee Title
CN1396485A (en) * 2001-07-06 2003-02-12 阿尔卑斯电气株式会社 Surface luminous device and liquid crystal display
CN2593229Y (en) * 2002-12-17 2003-12-17 统宝光电股份有限公司 Light source module of liquid crystal display
WO2005098311A2 (en) * 2004-03-31 2005-10-20 Schexnaider Craig J Light panel illuminated by light emitting diodes
CN1752807A (en) * 2004-09-21 2006-03-29 中华映管股份有限公司 Light source device, back light module and liquid crystal display
JP2006294343A (en) * 2005-04-07 2006-10-26 Mitsubishi Rayon Co Ltd Planar led light source device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1396485A (en) * 2001-07-06 2003-02-12 阿尔卑斯电气株式会社 Surface luminous device and liquid crystal display
CN2593229Y (en) * 2002-12-17 2003-12-17 统宝光电股份有限公司 Light source module of liquid crystal display
WO2005098311A2 (en) * 2004-03-31 2005-10-20 Schexnaider Craig J Light panel illuminated by light emitting diodes
CN1752807A (en) * 2004-09-21 2006-03-29 中华映管股份有限公司 Light source device, back light module and liquid crystal display
JP2006294343A (en) * 2005-04-07 2006-10-26 Mitsubishi Rayon Co Ltd Planar led light source device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588796A (en) * 2012-03-02 2012-07-18 睿鸿光电科技(福建)有限公司 Fastened round LED lamp
CN103411146A (en) * 2013-08-10 2013-11-27 无锡市宝成塑胶科技有限公司 Light-emitting diode (LED) panel lamp
CN107850272A (en) * 2015-07-20 2018-03-27 飞利浦照明控股有限公司 Lighting apparatus with light guide
CN107850272B (en) * 2015-07-20 2020-05-29 飞利浦照明控股有限公司 Lighting device with light guide
US10871281B2 (en) 2015-07-20 2020-12-22 Signify Holding B.V. Lighting device with light guide
CN109983271A (en) * 2016-11-22 2019-07-05 昕诺飞控股有限公司 Lamp with floating light source
CN110645541A (en) * 2018-06-27 2020-01-03 深圳市绎立锐光科技开发有限公司 Light source device and vehicle lamp
CN110645541B (en) * 2018-06-27 2021-12-21 深圳市绎立锐光科技开发有限公司 Light source device and vehicle lamp
JP2021047374A (en) * 2019-09-20 2021-03-25 セイコーエプソン株式会社 Wavelength conversion element, light source device and projector
JP7283327B2 (en) 2019-09-20 2023-05-30 セイコーエプソン株式会社 Wavelength conversion element, light source device and projector

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