CN101556023A - LED light source with wide-angle lens - Google Patents
LED light source with wide-angle lens Download PDFInfo
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- CN101556023A CN101556023A CNA2009100512140A CN200910051214A CN101556023A CN 101556023 A CN101556023 A CN 101556023A CN A2009100512140 A CNA2009100512140 A CN A2009100512140A CN 200910051214 A CN200910051214 A CN 200910051214A CN 101556023 A CN101556023 A CN 101556023A
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Abstract
The invention relates to an LED light source with a wide-angle lens, comprises a base, an LED luminescence chip and a lens; the LED luminescence chip and the lens have same central axis; wherein the lens is made of a plurality of layers of mediums which have same central axis; and the index of refraction of the plurality of layers of mediums increases sequentially and outward along the central axis. The LED light source with a wide-angle lens has a plurality of layers of mediums with the gradually changing index of refraction, effectively widens the angle of diffused light, reduces the distance of mixed light and realizes thinning of the backlight module.
Description
Technical field
The present invention relates to a kind of light emitting diode (led light source), particularly relate to a kind of led light source with wide-angle lens.
Background technology
Light emitting diode (LED) backlight has numerous advantages: structure of whole solid state, and mechanical strength is good; Operating voltage is low, and the life-span is long; Colored expressive ability is strong, environmental protection; Switch time is short, now has been widely used as the back of the body irradiation source of mobile phone, LCD and LCD TV.Particularly at the large scale liquid crystal TV domain, LED-backlit has been brought into play its characteristics especially: solid state light emitter is frangible unlike cold-cathode lamp (CCFL); Color representation power is strong, can obviously strengthen image quality; The most important thing is because it is a spot light, be easy to the dynamic area and drive control to reach energy-conservation and to promote the purpose etc. of contrast.Because the above-mentioned superiority that LED itself has, development in future trend is that LED-backlit source replaced C CFL backlight becomes main stream light sources.
The developing direction of LCD TV is large scale and slimming.Led light source more helps quickening to realize this purpose.It is used for LCD TV dual mode, and the one, side-light type, the 2nd, straight-down negative.
Realize the slimming of module backlight, adopt the side-light type light source than adopting straight-down negative and have more advantage.This is because the lighting system of the side-light type light mixing distance that (thickness direction) need be certain on the vertical panel direction unlike straight-down negative.Though side-light type also needs certain light mixing distance (producing bright dark alternate " firefly " effect otherwise can cause near the light source place), its mixed light direction is to be parallel on the panel direction, not increase module thickness.
LGP obtains uniform surface light source but side light type back light module all needs to arrange in pairs or groups.Its difficulty mainly is: 1) efficient of LGP is low; 2) large-size uniform is not good enough; 3) the ultra-thin light guide board cost is too high.Therefore under present technical conditions, side-light type is difficult to satisfy the demand of the oversize liquid crystal display more than 40 inches.
Straight-down negative is present optimal selection under the oversize situation.But as previously mentioned, the straight-down negative illumination needs certain light mixing distance just can reach the requirement of viewing area brightness uniformity, and this just makes it be difficult to realize slimming.General solution is a design LED wide-angle lens, the anaclasis that the wide angle emitted lens can make led chip send, thereby change the spatial distribution of light intensity, make light intensity do not concentrate on central shaft to, thereby reduce light mixing distance, realize slimming.
The led light source of existing employing wide-angle lens as shown in Figure 1, LED luminescence chip 12 is sealed in the outer lens 13, LED luminescence chip 12 and outer lens 13 are fixed on the pedestal 11, and the reflection that this technical scheme is utilized light is with the different of one deck interface both sides media refractive index and the refraction away from axial that produce realizes the purpose of wide angle emitted.Because of having only the outer N-Side surf 132 of outer lens to reflect, it is unsatisfactory that effect is penetrated in expansion, limited to increasing astigmatic angle effect.Therefore the led light source of this structure mainly utilizes reflecting part, lens top to realize the wide-angle effect, i.e. reflection by outer lens top curve surface 131 increases the lens lighting angle.In order to increase the astigmatic angle of reflecting part, to try one's best greatly in the reflecting part, but as the reflecting part excessive can make light reflection relief angle spend big again even change the direction of propagation surpass 90 degree, at this moment, light reflected will be by module sidewall backlight or bottom surface reflection from vertical LCD plane outgoing, greatly reduce light efficiency, and make LED lost can the zone the dynamic ability of control, be unfavorable for energy-conservation and improve contrast.
Summary of the invention
Technical problem to be solved by this invention provides a kind of led light source with wide-angle lens, effectively increases astigmatic angle, reduces light mixing distance, realizes module slimming backlight.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of led light source with wide-angle lens, comprise pedestal, LED luminescence chip and lens, described LED luminescence chip and lens have same central shaft, wherein, described lens are made of the multilayer dielectricity with same central shaft, and the refractive index of described multilayer dielectricity increases outward successively along central shaft.
In the led light source of above-mentioned band wide-angle lens, described lens outermost dielectric layer is hemispherical, and other dielectric layer is the semielliptical shape.
In the led light source of above-mentioned band wide-angle lens, the inner medium layer of described lens is a cavity.
In the led light source of above-mentioned band wide-angle lens, be filled with scattering material in the described cavity.
In the led light source of above-mentioned band wide-angle lens, the top of described lens is provided with groove.
In the led light source of above-mentioned band wide-angle lens, described groove is the V-type groove, side male type groove or side inner concave shape groove.
In the led light source of above-mentioned band wide-angle lens, the material of described lens is silica gel, Merlon, polymethyl methacrylate or optical glass.
In the led light source of above-mentioned band wide-angle lens, described lens are multilayer optical glass, and the variations in refractive index scope of described multilayer optical glass is 1.5～1.85.
The present invention contrasts prior art following beneficial effect: the led light source of band wide-angle lens provided by the invention, described lens have the medium of multilayer graded index, can make light that LED sends through the multilayer graded index medium of lens to away from central shaft to deviation, improve refraction effect and light utilization efficiency, increase astigmatic angle, reduce light mixing distance.
Description of drawings
Fig. 1 is prior art led light source and opticpath schematic diagram thereof.
Fig. 2 is led light source of the present invention and opticpath schematic diagram thereof.
Fig. 3 is a lens top-slitting exemplary plot of the present invention.
Fig. 4 is that lens innermost layer formation cavity of the present invention adds the scattering object exemplary plot.
Fig. 5 is the backlight module schematic diagram that adopts led light source of the present invention.
Among the figure:
11 pedestal 12LED luminescence chips
13 outer lens, 131 outer lens top curve surface
Outer N-Side surf 20 central shafts of 132 outer lens
21 pedestal 22LED luminescence chips
23 encapsulating materials, 24 ground floor lens
The 3rd layer of lens of 25 second layer lens 26
27 the 4th layers of lens 28 layer 5 lens
29 layer 6 lens, 210 top groove
241 scattering objects, 251 outermost surfaces
1201V type groove 1202 side male type grooves
1203 side inner concave shape groove 31 chases
32PCB plate 33LED light source
34 diffusion sheets, 35 prismatic lenses
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.
Fig. 2 is led light source of the present invention and opticpath schematic diagram thereof.
See also Fig. 2, led light source of the present invention comprises pedestal 21, LED luminescence chip 22 and lens, described LED luminescence chip 22 and lens have same central shaft 20, LED luminescence chip 22 is wrapped with encapsulating material 23, wherein, described lens are made of the multilayer dielectricity with same central shaft, and the refractive index of described multilayer dielectricity increases outward successively along central shaft 20.
Present embodiment is an example with six layers of different medium layer, and described lens comprise ground floor lens 24 outward successively along central shaft 20,25, the three layers of lens of second layer lens 26, the four layers of lens 27, layer 5 lens 28 and layer 6 lens 29.Described lens material is a silica gel, Merlon, polymethyl methacrylate or optical glass, it is example that present embodiment adopts multilayer optical glass, the variations in refractive index scope of described multilayer optical glass is 1.5～1.85, wherein, innermost layer refractive index minimum, big more along the past more outer refractive index of central shaft 20, layer 6 lens 29 are hemispherical, other dielectric layer, and promptly the ground floor lens 24, second layer lens 25,26, the four layers of lens 27 of the 3rd layer of lens are that shape is identical with layer 5 lens 28, the semielliptical shape that size increases successively, the major axis of described semiellipsoid and minor axis bigger, promptly the ellipse more refraction effect of other dielectric layer semielliptical is good more.
Below with blue-light LED chip, yellow fluorescent powder is made encapsulating material 23 and is example, illustrate that six layers of dielectric layer of present embodiment are to the ray refraction effect, the blue light that sends by LED luminescence chip 22, behind yellow fluorescent powder, excite sodium yellow, sodium yellow and blue light mix the outgoing of formation white light mutually, light passes through ground floor lens 24 successively, second layer lens 25,26, the four layers of lens 27 of the 3rd layer of lens, layer 5 lens 28 and layer 6 lens 29, because the refractive index of multilayer dielectricity increases progressively successively, deviation away from central shaft 20 all can take place at every turn through 2 layers of interface the time, at last via outermost external surface 291, experiences once more away from central shaft 20 deviation outgoing, in six layers of different refractivity medium, reflect 6 times last outgoing altogether.
Fig. 3 is a lens top-slitting exemplary plot of the present invention.
See also Fig. 3, in order further to increase astigmatic effect, can slot in lens top in the foregoing description, most of light is through ground floor lens 24, second layer lens 25,26, the four layers of lens 27 of the 3rd layer of lens, layer 5 lens 28 and layer 6 lens 29 produce six refractions away from central shaft 20.In addition, part light is through lens top groove 210 reflection, and part is through top groove 210 refractions and transmission has weakened the top output intensity.To the lens top-slitting, further increase astigmatic angle in this example, reduce light mixing distance.Wherein, top groove 210 shapes can be V-type grooves 2101, also can be side inner concave shape groove 2102 or side male type groove 2103, and its effect is to utilize reflection to weaken the light intensity of top-direction.Because present embodiment mainly still utilizes the lens jacket of six layers of gradually changed refractive index to realize astigmatism, therefore groove 210 does not need out very greatly, can not produce the reflecting part excessive make light reflection relief angle spend big even change the direction of propagation surpass 90 degree, thereby reduce the problem of light efficiency.
Fig. 4 is that lens innermost layer formation cavity of the present invention adds the scattering object exemplary plot.
See also Fig. 4, the ground floor lens 24 of the foregoing description are the dielectric layers of refractive index minimum, therefore can directly ground floor lens 24 hollow outs be formed cavity, be that ground floor lens 24 are light vegetables media with the air, in order further to increase the astigmatic effect of control, added scattering material 261 in the described cavity, effect is to strengthen light scattering effect, and this diffuser material can be the various scattering materials that can produce scattering process.
Fig. 5 is the backlight module schematic diagram that adopts led light source of the present invention.
See also Fig. 5, backlight module of the present invention is made backlight with any led light source in the foregoing description, and module backlight also comprises chase 31, pcb board 32, led light source 33, diffusion sheet 34, prismatic lens 35.Plurality of LEDs is lined up two-dimensional array and equidistantly is fixed on the pcb board 32 by viscose agent or scolder, realizes electric interconnected between led light source 33 and the pcb board 32 by the lead-in wire bonding.Pcb board 32 adopts the aluminium base of good heat conductivity, or adopts metal inner core printed circuit board (PCB) (MCPCB, Metal Core PCB) to strengthen heat radiation.Led light source 33 place face coating highly reflective silverskin or tunica albuginea are to improve light utilization efficiency on pcb board 32.The light that led light source 33 sends is through diffuser plate 34, and prismatic lens 35 transmits, and forms uniform area light source.Because this example has used the led light source of band wide-angle lens, therefore can realize module slimming backlight.In addition,, thereby be particularly suitable for being applied to dynamic area control, realize energy-conservation and the raising contrast because led light source of the present invention can conveniently be controlled the degree of expansion of LED lighting angle.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (8)
1, a kind of led light source with wide-angle lens, comprise pedestal, LED luminescence chip and lens, described LED luminescence chip and lens have same central shaft, it is characterized in that, described lens are made of the multilayer dielectricity with same central shaft, and the refractive index of described multilayer dielectricity increases outward successively along central shaft.
2, the led light source of band wide-angle lens according to claim 1 is characterized in that, described lens outermost dielectric layer is hemispherical, and other dielectric layer is the semielliptical shape.
3, the led light source of band wide-angle lens according to claim 1 is characterized in that, described lens innermost layer is formed with cavity along central shaft.
4, the led light source of band wide-angle lens according to claim 3 is characterized in that, is filled with scattering material in the described cavity.
5, the led light source of band wide-angle lens according to claim 1 is characterized in that, the top of described lens is provided with groove.
6, the led light source of band wide-angle lens according to claim 5 is characterized in that, described groove is V-type groove, side male type groove or side inner concave shape groove.
7, the led light source of band wide-angle lens according to claim 1 is characterized in that, the material of described lens is silica gel, Merlon, polymethyl methacrylate or optical glass.
8, the led light source of band wide-angle lens according to claim 7 is characterized in that, described lens are multilayer optical glass, and the variations in refractive index scope of described multilayer optical glass is 1.5～1.85.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100512140A CN101556023A (en) | 2009-05-14 | 2009-05-14 | LED light source with wide-angle lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100512140A CN101556023A (en) | 2009-05-14 | 2009-05-14 | LED light source with wide-angle lens |
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| CN101556023A true CN101556023A (en) | 2009-10-14 |
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ID=41174239
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100512140A Pending CN101556023A (en) | 2009-05-14 | 2009-05-14 | LED light source with wide-angle lens |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306698A (en) * | 2011-09-30 | 2012-01-04 | 深圳市灏天光电有限公司 | Novel LED packaging structure |
| CN102374482A (en) * | 2010-08-22 | 2012-03-14 | 泰金宝电通股份有限公司 | Lens and lamp using same |
| US8405297B2 (en) | 2009-12-01 | 2013-03-26 | Au Optronics Corporation | Illumination device with wide output angle and manufacture method thereof |
| TWI412706B (en) * | 2011-07-27 | 2013-10-21 | 麗光科技股份有限公司 | Light source module using the same |
| TWI422781B (en) * | 2010-08-22 | 2014-01-11 | Cal Comp Electronics & Comm Co | Lens and lamp using the same |
| US8696172B2 (en) | 2010-08-22 | 2014-04-15 | Cal-Comp Electronics & Communications Company Limited | Lens and lamp using the same |
| CN103872207A (en) * | 2014-02-21 | 2014-06-18 | 东莞美盛电器制品有限公司 | Strong-light LED (light emitting diode) light source module and production process thereof |
| CN103996761A (en) * | 2013-02-16 | 2014-08-20 | 晶元光电股份有限公司 | Light emitting element |
| CN104344335A (en) * | 2013-08-05 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Lens and light source module using the lens |
| EP2870406A4 (en) * | 2012-07-09 | 2015-06-03 | Evolucia Lighting Inc | Solid state lighting luminaire with modular refractors |
| EP2870407A4 (en) * | 2012-07-09 | 2015-07-15 | Light unit with light output pattern synthesized from multiple light sources and modular refractors | |
| CN105444044A (en) * | 2014-09-24 | 2016-03-30 | 青岛海信电器股份有限公司 | LED luminescent device, backlight unit and display panel |
| CN105444045A (en) * | 2014-09-24 | 2016-03-30 | 青岛海信电器股份有限公司 | LED luminescent device, a backlight unit and a display panel |
| CN105465738A (en) * | 2014-08-20 | 2016-04-06 | 青岛海信电器股份有限公司 | Lens, direct-light-type backlight module and liquid crystal display device |
| US9470371B2 (en) | 2008-07-02 | 2016-10-18 | Evolucia, Inc. | Light unit with light output pattern synthesized from multiple light sources |
| CN106773289A (en) * | 2016-12-15 | 2017-05-31 | 青岛海信电器股份有限公司 | A kind of quantum dot light emitting device and backlight module and liquid crystal display device |
| CN107731992A (en) * | 2017-11-28 | 2018-02-23 | 西安科锐盛创新科技有限公司 | LED encapsulation structure |
| CN107731991A (en) * | 2017-11-28 | 2018-02-23 | 西安科锐盛创新科技有限公司 | Suitable for the LED car lamp of automobile |
| CN107994107A (en) * | 2017-11-28 | 2018-05-04 | 西安科锐盛创新科技有限公司 | A kind of great power LED double-decker packaging technology |
| CN108011027A (en) * | 2017-11-28 | 2018-05-08 | 西安科锐盛创新科技有限公司 | LED encapsulation structure and its method |
| CN108279528A (en) * | 2018-01-17 | 2018-07-13 | 惠州市华星光电技术有限公司 | A kind of backlight |
| 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 |
| CN111081849A (en) * | 2020-01-03 | 2020-04-28 | 广东省半导体产业技术研究院 | LED packaging structure and packaging method |
| WO2024022071A1 (en) * | 2022-07-29 | 2024-02-01 | 京东方科技集团股份有限公司 | Display module and preparation method therefor, and display panel |
| CN118330970A (en) * | 2024-06-12 | 2024-07-12 | 杭州海康威视数字技术股份有限公司 | Light filling lamp and camera equipment |
-
2009
- 2009-05-14 CN CNA2009100512140A patent/CN101556023A/en active Pending
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9470371B2 (en) | 2008-07-02 | 2016-10-18 | Evolucia, Inc. | Light unit with light output pattern synthesized from multiple light sources |
| US8405297B2 (en) | 2009-12-01 | 2013-03-26 | Au Optronics Corporation | Illumination device with wide output angle and manufacture method thereof |
| CN102374482B (en) * | 2010-08-22 | 2014-07-23 | 泰金宝电通股份有限公司 | Lens and lamp using same |
| TWI422781B (en) * | 2010-08-22 | 2014-01-11 | Cal Comp Electronics & Comm Co | Lens and lamp using the same |
| US8696172B2 (en) | 2010-08-22 | 2014-04-15 | Cal-Comp Electronics & Communications Company Limited | Lens and lamp using the same |
| CN102374482A (en) * | 2010-08-22 | 2012-03-14 | 泰金宝电通股份有限公司 | Lens and lamp using same |
| TWI412706B (en) * | 2011-07-27 | 2013-10-21 | 麗光科技股份有限公司 | Light source module using the same |
| US8641238B2 (en) | 2011-07-27 | 2014-02-04 | Beautiful Light Technology Corp. | Light source module |
| CN102306698A (en) * | 2011-09-30 | 2012-01-04 | 深圳市灏天光电有限公司 | Novel LED packaging structure |
| EP2870407A4 (en) * | 2012-07-09 | 2015-07-15 | Light unit with light output pattern synthesized from multiple light sources and modular refractors | |
| EP2870406A4 (en) * | 2012-07-09 | 2015-06-03 | Evolucia Lighting Inc | Solid state lighting luminaire with modular refractors |
| CN104822984A (en) * | 2012-07-09 | 2015-08-05 | 伊沃卢西亚照明股份有限公司 | Solid state lighting luminaire with modular refractors |
| CN105051451A (en) * | 2012-07-09 | 2015-11-11 | 伊沃卢西亚照明股份有限公司 | Light unit with light output pattern synthesized from multiple light sources and modular refractors |
| CN103996761A (en) * | 2013-02-16 | 2014-08-20 | 晶元光电股份有限公司 | Light emitting element |
| CN103996761B (en) * | 2013-02-16 | 2018-04-10 | 晶元光电股份有限公司 | Light emitting element |
| CN104344335A (en) * | 2013-08-05 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Lens and light source module using the lens |
| CN103872207A (en) * | 2014-02-21 | 2014-06-18 | 东莞美盛电器制品有限公司 | Strong-light LED (light emitting diode) light source module and production process thereof |
| CN105465738A (en) * | 2014-08-20 | 2016-04-06 | 青岛海信电器股份有限公司 | Lens, direct-light-type backlight module and liquid crystal display device |
| CN105444044A (en) * | 2014-09-24 | 2016-03-30 | 青岛海信电器股份有限公司 | LED luminescent device, backlight unit and display panel |
| CN105444045A (en) * | 2014-09-24 | 2016-03-30 | 青岛海信电器股份有限公司 | LED luminescent device, a backlight unit and a display panel |
| CN106773289A (en) * | 2016-12-15 | 2017-05-31 | 青岛海信电器股份有限公司 | A kind of quantum dot light emitting device and backlight module and liquid crystal display device |
| CN107994107A (en) * | 2017-11-28 | 2018-05-04 | 西安科锐盛创新科技有限公司 | A kind of great power LED double-decker packaging technology |
| CN107731991A (en) * | 2017-11-28 | 2018-02-23 | 西安科锐盛创新科技有限公司 | Suitable for the LED car lamp of automobile |
| CN107731992A (en) * | 2017-11-28 | 2018-02-23 | 西安科锐盛创新科技有限公司 | LED encapsulation structure |
| CN108011027A (en) * | 2017-11-28 | 2018-05-08 | 西安科锐盛创新科技有限公司 | LED encapsulation structure and its method |
| CN108279528A (en) * | 2018-01-17 | 2018-07-13 | 惠州市华星光电技术有限公司 | A kind of backlight |
| 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 |
| CN111081849A (en) * | 2020-01-03 | 2020-04-28 | 广东省半导体产业技术研究院 | LED packaging structure and packaging method |
| WO2024022071A1 (en) * | 2022-07-29 | 2024-02-01 | 京东方科技集团股份有限公司 | Display module and preparation method therefor, and display panel |
| CN118330970A (en) * | 2024-06-12 | 2024-07-12 | 杭州海康威视数字技术股份有限公司 | Light filling lamp and camera equipment |
| CN118330970B (en) * | 2024-06-12 | 2024-09-06 | 杭州海康威视数字技术股份有限公司 | Light filling lamp and camera equipment |
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Open date: 20091014 |