CN201749867U - Monochrome LED encapsulation structure with high light transmittance and projection optical engine employing same - Google Patents
Monochrome LED encapsulation structure with high light transmittance and projection optical engine employing same Download PDFInfo
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- CN201749867U CN201749867U CN2010201798393U CN201020179839U CN201749867U CN 201749867 U CN201749867 U CN 201749867U CN 2010201798393 U CN2010201798393 U CN 2010201798393U CN 201020179839 U CN201020179839 U CN 201020179839U CN 201749867 U CN201749867 U CN 201749867U
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- high light
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- encapsulating structure
- emitting rate
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Abstract
A monochrome LED encapsulation structure with high light transmittance comprises a substrate, at least a LED chip arranged on the surface of the substrate and a glass optical lends wrapping the LED chip; transparent encapsulation colloid covering the LED chip is filled between the glass optical lens and the substrate, the refraction index of the encapsulation colloid is lower than or equal to the refraction index of the glass optical lens and is also lower than the refraction index of the LED chip. As the glass optical lens with simple machining technique is adopted, and encapsulation colloid with lower refraction index is filled between the glass optical lens and the substrate, the angle of total reflection is reduced, and the light transmittance is improved; meanwhile, the whole encapsulation process is simplified and the qualified rate is improved. Besides, the utility model also provides a projection optical engine employing the monochrome LED encapsulation structure with high light transmittance.
Description
Technical field
The utility model relates to LED encapsulating structure and projection display technique, relates in particular to a kind of monochromatic LED encapsulating structure of high light-emitting rate and uses its projecting optical engine.
Background technology
In recent years, because light-emitting diode (Light Emitting Diode, LED) characteristics such as Toxic matter are grown, are quick on the draw, are not contained to luminous efficiency height, life-span, make its application more and more widely, be considered to continue incandescent lamp, the later third generation lighting source of fluorescent lamp are widely used in liquid crystal projection apparatus, mobile phone backlight, display screen etc.Along with development of science and technology, LED also develops towards high brightness, low-loss direction.Yet the brightness that will improve LED reduces its light loss, and except from the architecture advances of LED own, the packaged type of led chip influences the key of its luminosity, the luminous uniformity especially.
Usually, the core luminous component of LED is the pn knot tube core that is made of p type and n N-type semiconductor N, and minority carrier and majority carrier compound tense when injecting the pn knot will send visible light, ultraviolet light or near infrared light.But the photon that pn sends in the interface is a non-directional, promptly identical probability is arranged to all directions emission, therefore, be not that all light that tube core produces can discharge, this depends primarily on semi-conducting material quality, tube core structure and geometry, encapsulation internal structure and encapsulating material.Traditional monochromatic LED encapsulating structure is directly led chip to be fixed on the substrate, afterwards again by electrode on the gold thread connection led chip and the conductive layer on the substrate.Yet, because light enters optically thinner medium (air) by optically denser medium (chip light-emitting layer), the refraction effect of off-normal direction can take place in light, and, when refringence is big more, refraction effect is severe more, makes light cause reflection loss at the outgoing interface owing to refringence on the one hand, and light extraction efficiency is lower; On the other hand,, can produce total reflection, make a lot of light, can't from chip, shine the outside, further reduce light extraction efficiency owing to total reflection loses when incidence angle during greater than critical angle; In addition, traditional monochromatic LED encapsulating structure all exposes in air led chip and gold thread, and reliability is relatively poor.
Application number " 200920205772.3 " name is called the monochromatic LED encapsulating structure that " the monochromatic LED encapsulating structure of high light-emitting rate and use its projecting optical engine " discloses a kind of high light-emitting rate in China's utility application specification, it is by being provided with spherical packing colloid on the monochromatic LED chip, though dwindle the refractive index difference of critical mass, reduce loss at total reflection, improve light extraction efficiency, yet, the packaging technology of this spherical packing colloid is complicated, often need specific mould to assist and carry out, the yields of production is low.
The utility model content
The technical problems to be solved in the utility model provides the monochromatic LED encapsulating structure of the high high light-emitting rate of a kind of packaging technology yields simple, that produce.
In addition, also need provide the projecting optical engine that a kind of cost is lower, Projection Display is effective.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of monochromatic LED encapsulating structure of high light-emitting rate, comprise substrate, at least one is arranged at the led chip of described substrate surface, and the glass optical lens that coats described led chip, also be filled with the transparent enclosure colloid that covers described led chip between described glass optical lens and the substrate, the refractive index of described packing colloid is less than or equal to the refractive index of glass optical lens, and the while is less than the refractive index of led chip.
A kind of projecting optical engine comprises little display floater, projection lens and lighting device.Wherein, little display floater is modulated incident light, and modulates the image light that carries image information.Projection lens is used for the visual information projection on described little display floater is imaged onto screen.Lighting device shines described little display floater.This lighting device comprises the monochromatic LED encapsulating structure of a plurality of above-mentioned described high light-emitting rates.
A kind of projecting optical engine comprises lighting device, Digital Micromirror Device, total internal reflection prism and projection lens.Wherein, lighting device is used to provide incident ray, and it comprises the monochromatic LED encapsulating structure of a plurality of above-mentioned described high light-emitting rates.Digital Micromirror Device optionally reflects described incident ray to produce image light.Total internal reflection prism is arranged between described lighting device and the Digital Micromirror Device, and incident ray is imported described Digital Micromirror Device and reflects the image light of described Digital Micromirror Device outgoing.Projection lens is used to receive the image light of this Digital Micromirror Device institute outgoing, and this image ray cast is become image frame.
Encapsulating structure of the present utility model by the simple glass optical lens of processing technology is set, and is filled the less packing colloid of refractive index between this glass optical lens and substrate, reduce the angle of total reflection, improve light extraction efficiency, simultaneously, simplify whole packaging technology, promoted the production yield.And use the projecting optical engine of this encapsulating structure, little display floater/the Digital Micromirror Device of rayed of the high light-emitting rate of the monochromatic LED encapsulating structure outgoing that packaging technology is simple, yields is high, afterwards, modulate image light by little display floater/Digital Micromirror Device, output to external screen from projection lens, simple in structure, efficiency of light energy utilization height, production cost is lower, and Projection Display is effective.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model first execution mode.
Fig. 2 is the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model second execution mode.
Fig. 3 is the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model the 3rd execution mode.
Fig. 4 is the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model the 4th execution mode.
Fig. 5 is the planar structure schematic diagram of the utility model first execution mode projecting optical engine.
Fig. 6 is the planar structure schematic diagram of the utility model second execution mode projecting optical engine.
Embodiment
Figure 1 shows that the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model first execution mode.The monochromatic LED encapsulating structure of high light-emitting rate comprises substrate 10, led chip 20, gold thread 30, packing colloid 40 and glass optical lens 50.
Again, the surface of substrate 10 is provided with boss 101, and led chip 20 is arranged on the boss 101, adopts the structure of boss 101, helps collecting to greatest extent the light that led chip 20 sends.In the utility model execution mode, boss 101 is one-body molded with substrate 10.
In other execution mode of the utility model, boss 101 also can separate setting with substrate 10.Certainly, this boss 101 also can omit.
Glass optical lens 50 coats led chip 20.Be filled with the transparent enclosure colloid 40 that covers led chip 20 between glass optical lens 50 and the substrate 10, for led chip 20 provides reliable protection.In the utility model execution mode, the refractive index of this packing colloid 40 is less than or equal to the refractive index of glass optical lens 50, and the while is less than the refractive index of led chip 20.Preferably use silica gel as packing colloid 40.The less packing colloid 40 of refractive index is between led chip 20 and the glass optical lens 50, when photon when chip light-emitting layer (optically denser medium) enters packing colloid 40 (optically thinner medium), because refringence is less, therefore the angle of total reflection is less, enter glass light lens 50 after making the part photon energy see through packing colloid 40, and the refractive index of packing colloid 40 is less than or equal to the refractive index of glass optical lens 50, therefore there is not the angle of total reflection, so, adopt this encapsulating structure, the loss of photon is less, has improved light extraction efficiency; In addition, packing colloid 40 coats led chip 20 and gold thread 30 simultaneously, carries out mechanical protection, improves the reliability of LED encapsulation.Consult Fig. 1, the periphery of packing colloid 40 is extended with flange 401, and the sidewall of glass optical lens is concordant with this flange 401.Adopt the structure of flange 401, help increasing packing colloid 40 and be connected with the reliable of substrate 10.Certainly, less demanding to what connect when the LED encapsulating structure, this flange 401 also can omit.
In the utility model execution mode, glass optical lens 50 surfaces are coated with the antireflective coating (not shown), are used to improve light extraction efficiency.Consult Fig. 1, glass optical lens 50 is a hemisphere, and the interface of itself and packing colloid 40 is the plane, adopts this structure, helps reducing the light source luminescent area, promotes illuminator and receives optical efficiency.
Encapsulating structure of the present utility model by the simple glass optical lens of processing technology is set, and is filled the less packing colloid of refractive index between this glass optical lens and substrate, reduce the angle of total reflection, improve light extraction efficiency, simultaneously, simplify whole packaging technology, promoted the production yield; In addition, at glass optics lens surface coated with antireflection film, further be lifted out optical efficiency.
Figure 2 shows that the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model second execution mode.The encapsulating structure of this monochromatic LED encapsulating structure and first execution mode is basic identical, and difference is that the quantity of led chip 20 ' shown in Figure 2 is a plurality of, is matrix or circular arrangement.That is, the monochromatic LED encapsulating structure of Fig. 2 is an array package, and at this moment, packing colloid 40 coats all led chips 20 ' and gold thread 30.
The test of form 1 red-light LED
The test of form 2 green light LEDs
Consult form 1 and 2, all adopt four led chips, in the test result of normal temperature (25 ℃).Not encapsulation wherein is meant and does not add encapsulation colloid and glass optical lens.Consult form 1, when red LED chip was 0.7*10.0 at electric current * voltage, the luminous flux when not encapsulating was 195.51m, and adopt same chip, use encapsulating structure of the present utility model, the luminous flux of red light chips then promotes and is 302.61m, has promoted 55% when not encapsulating.Equally, consult form 2, when the green light LED chip is 3.0*4.7 at electric current * voltage, luminous flux when not encapsulating is 465.01m, and adopts same chip, uses encapsulating structure of the present utility model, the luminous flux of green glow chip then promotes and is 560.31m, has promoted 20% when not encapsulating.Therefore, pass through test shows, encapsulating structure of the present utility model, by the simple glass optical lens of processing technology is set, and between this glass optical lens and substrate, fill the less packing colloid of refractive index, can reduce the angle of total reflection, improve light extraction efficiency, simultaneously, simplify whole packaging technology, promoted the production yield.
Figure 3 shows that the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model the 3rd execution mode.The encapsulating structure of this monochromatic LED encapsulating structure and first execution mode is basic identical, and difference is that glass optical lens shown in Figure 3 50 ' is inverted U, and its vertical section is oval.Because package geometry is different to the influence of photon effusion efficient, usually, adopt pointedly, can make light focus on the axis direction of LED, the visual angle is less accordingly; If the top is circle or plane, its corresponding visual angle will increase.The utility model execution mode adopts inverted U, and is littler than the angle of divergence of dome-type.
Figure 4 shows that the sectional structure schematic diagram of monochromatic LED encapsulating structure of the high light-emitting rate of the utility model the 4th execution mode.The encapsulating structure of this monochromatic LED encapsulating structure and first execution mode is basic identical, and difference is glass optical lens 50 shown in Figure 4 " be selenodont, the interface of itself and packing colloid 40 ' is a convex surface.Adopt the encapsulation of this structure, when light enters glass optical lens 50 from packing colloid 40 ' " time, the convex interface energy directly promotes the optical efficiency of getting of LED encapsulation, and the light extraction efficiency of its encapsulation is higher than the encapsulating structure of first execution mode, the 3rd execution mode.
Figure 5 shows that the planar structure schematic diagram of the utility model first execution mode projecting optical engine.Projecting optical engine comprises lighting device 60, polarizing beam splitter 70, little display floater 80 and projection lens 90.Wherein, the little display floater 80 of lighting device 60 irradiations, it comprises the monochromatic LED encapsulating structure of a plurality of above-mentioned arbitrary execution modes and the various shaping mirror group (not shown)s of emergent light being carried out shaping.
Polarizing beam splitter 70 is arranged on the output light path of lighting device 60, in the utility model execution mode, polarizing beam splitter 70 is the lens type polarizing beam splitter, compose cube shaped by two triangular prisms, be coated with the polarization spectro rete therebetween on the contact-making surface, form a polarization light-dividing surface by this polarization spectro rete, this polarization light-dividing surface can be converted to non-polarized light polarised light and isolate the S polarised light and the P polarised light.Certainly, polarizing beam splitter 70 also can compose other shape by other prism, is converted into the polarised light outgoing as long as satisfy the non-polarized light of incident.
In other execution mode of the utility model, this polarizing beam splitter 70 also can be replaced by flat polarizing beam splitter.
The quantity of little display floater 80 is one, is arranged at a non-adjacent side of polarizing beam splitter 70 and lighting device, is used for received incident light is modulated, and modulates the image light that carries image information.In the utility model execution mode, little display floater 80 is that (Liquid Crystalon Silicon, LCOS), its input path is provided with polarizing beam splitter 70 to the reflective type silicon-based liquid crystal panel.When the light that receives when little display floater 80 is the S polarised light,, then reflect another polarised light P polarised light that carries image information through after the modulation of little display floater 80, behind polarizing beam splitter 70 folded optical paths, with this P polarized light transmission to projection lens 90.Projection lens 90 and little display floater 80 opposing parallel settings in the execution mode of the present utility model are used for the visual information projection on little display floater 80 is imaged onto screen.
In other execution mode of the utility model, the received polarised light of little display floater 80 ' (shown in the dotted line of Fig. 5) also can be the P polarised light, through after the modulation of little display floater 80 ', be converted to the S polarised light that carries image information, and on its reflected back polarizing beam splitter 70, this S polarised light is reflexed on the projecting lens 80 by polarizing beam splitter 70.In other words, a projecting lens 80 and little display floater a 80 ' adjacent side that is arranged at polarizing beam splitter 70, that is, projecting lens 80 is arranged at respectively on the adjacent two sides of polarizing beam splitter 70 with little display floater 80 '.At this moment, projecting lens 80 is to be used to receive and throw the S polarised light that carries image information.
Therefore, the projecting optical engine of present embodiment, the light of the high light-emitting rate of monochromatic LED encapsulating structure outgoing is by the shaping of shaping mirror group, the polarization separation of polarizing beam splitter, shine little display floater, afterwards, little display floater modulates image light and enters polarizing beam splitter once more, outputs to external screen by polarizing beam splitter from projection lens, simple in structure, efficiency of light energy utilization height, production cost is lower, and Projection Display is effective.
Figure 6 shows that the planar structure schematic diagram of the utility model second execution mode projecting optical engine.This projecting optical engine comprises lighting device 61, total internal reflection prism 71, Digital Micromirror Device (DigitalMicromirror Device, DMD) 81 and projection lens 91.Wherein, lighting device 61 is used to provide incident ray, and it comprises the monochromatic LED encapsulating structure of a plurality of above-mentioned arbitrary execution modes and the various shaping mirror groups of emergent light being carried out shaping.
Therefore, the projecting optical engine of present embodiment, the light of the high light-emitting rate of the monochromatic LED encapsulating structure outgoing that packaging technology is simple, yields is high is by the shaping of shaping mirror group, and the reflection of total internal reflection prism enters Digital Micromirror Device and carries out modulation, afterwards, Digital Micromirror Device modulates image light (image light) and outputs to external screen from projection lens, and is simple in structure, efficiency of light energy utilization height, production cost is lower, and Projection Display is effective.
The embodiment of the above is a better embodiment of the present utility model, be not to limit concrete practical range of the present utility model with this, scope of the present utility model comprises and is not limited to this embodiment that for example, little display floater is transmissive liquid crystal panel (Liquid Crystal Display, LCD), at this moment, omit polarizing beam splitter, transmissive liquid crystal panel is arranged on the emitting light path of lighting device, incident light is modulated, and transmitted the light that carries image information.The equivalence variation that all shapes according to the utility model, structure are done all comprises in the protection range of the present utility model.
Claims (15)
1. the monochromatic LED encapsulating structure of a high light-emitting rate, comprise that substrate and at least one are arranged at the led chip of described substrate surface, it is characterized in that, also comprise the glass optical lens that coats described led chip, also be filled with the transparent enclosure colloid that covers described led chip between described glass optical lens and the substrate, the refractive index of described packing colloid is less than or equal to the refractive index of glass optical lens, and the while is less than the refractive index of led chip.
2. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, described glass optics lens surface is coated with antireflective coating.
3. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, described glass optical lens is hemisphere, inverted U or selenodont.
4. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, the interface of described glass optical lens and packing colloid is plane or convex surface.
5. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, the periphery of described packing colloid is extended with flange.
6. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 5 is characterized in that, the sidewall of described glass optical lens is concordant with described flange.
7. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, described packing colloid is a silica gel.
8. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, described led chip also is welded with gold thread, and described packing colloid coats described gold thread.
9. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, described substrate is a metal substrate.
10. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 1 is characterized in that, the surface of described substrate has boss, and described led chip is arranged on the described boss.
11. the monochromatic LED encapsulating structure of high light-emitting rate according to claim 10 is characterized in that described boss and substrate are one-body molded.
12. a projecting optical engine comprises:
Little display floater is modulated incident light, and modulates the image light that carries image information;
Projection lens is used for the visual information projection on described little display floater is imaged onto screen; And
Lighting device shines described little display floater, it is characterized in that, described lighting device comprises a plurality of monochromatic LED encapsulating structures according to any described high light-emitting rate in the claim 1 to 11.
13. projecting optical engine according to claim 12 is characterized in that, described little display floater is LCOS, also is provided with polarizing beam splitter on its input path.
14. projecting optical engine according to claim 12 is characterized in that, described little display floater is LCD.
15. a projecting optical engine comprises:
Lighting device is used to provide incident ray, it is characterized in that, described lighting device comprises a plurality of monochromatic LED encapsulating structures according to any described high light-emitting rate in the claim 1 to 11;
Digital Micromirror Device optionally reflects described incident ray to produce image light;
Total internal reflection prism is arranged between described lighting device and the Digital Micromirror Device, and incident ray is imported described Digital Micromirror Device and reflects the image light of described Digital Micromirror Device outgoing; And
Projection lens is used to receive the image light of this Digital Micromirror Device institute outgoing, and this image ray cast is become image frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201798393U CN201749867U (en) | 2010-04-28 | 2010-04-28 | Monochrome LED encapsulation structure with high light transmittance and projection optical engine employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201798393U CN201749867U (en) | 2010-04-28 | 2010-04-28 | Monochrome LED encapsulation structure with high light transmittance and projection optical engine employing same |
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| Publication Number | Publication Date |
|---|---|
| CN201749867U true CN201749867U (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201798393U Expired - Lifetime CN201749867U (en) | 2010-04-28 | 2010-04-28 | Monochrome LED encapsulation structure with high light transmittance and projection optical engine employing same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943766A (en) * | 2014-05-15 | 2014-07-23 | 刘如松 | LED (Light Emitting Diode) light source provided with light distribution device |
| TWI459124B (en) * | 2012-09-10 | 2014-11-01 | Shinyoptics Corp | Light-emitting diode adapted for using in projection system |
| CN110473950A (en) * | 2019-07-26 | 2019-11-19 | 惠州市华星光电技术有限公司 | Backlight module and display panel |
-
2010
- 2010-04-28 CN CN2010201798393U patent/CN201749867U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI459124B (en) * | 2012-09-10 | 2014-11-01 | Shinyoptics Corp | Light-emitting diode adapted for using in projection system |
| CN103943766A (en) * | 2014-05-15 | 2014-07-23 | 刘如松 | LED (Light Emitting Diode) light source provided with light distribution device |
| CN110473950A (en) * | 2019-07-26 | 2019-11-19 | 惠州市华星光电技术有限公司 | Backlight module and display panel |
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| CP02 | Change in the address of a patent holder |
Address after: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 No. 1 Building 6 East Patentee after: Butterfly Technology (Shenzhen) Limited Address before: 518057, Guangdong, Nanshan District hi tech Industrial Park, Shenzhen District North West Road, No. 5, Galaxy Fengyun building, 3 floor Patentee before: Butterfly Technology (Shenzhen) Limited |
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Granted publication date: 20110216 |
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