CN108006583B - Automobile lamp - Google Patents
Automobile lamp Download PDFInfo
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- CN108006583B CN108006583B CN201711210775.1A CN201711210775A CN108006583B CN 108006583 B CN108006583 B CN 108006583B CN 201711210775 A CN201711210775 A CN 201711210775A CN 108006583 B CN108006583 B CN 108006583B
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- silica gel
- gel layer
- led
- base
- spherical lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention relates to an automotive lamp 10 comprising: a base 11; an LED light source 12 arranged at the middle position of the upper surface of the base 11; the reflecting cup 13 is arranged on the upper surface of the base 11 and positioned outside the LED 12; the heat radiating fins 14 are arranged on the upper surface of the base 11 and positioned outside the reflecting cup 13; and the condensing lens 15 is arranged at the top end of the reflecting cup 13. The automobile lamp provided by the invention has the advantages of good heat dissipation effect and simple structure.
Description
Technical Field
The invention belongs to the technical field of illumination, and particularly relates to an automobile lamp.
Background
With the progress of the times, automobiles play an increasingly important role in daily life of people. As a necessary tool for the night driving of the automobile, the automobile lamp can provide illumination for a driver so as to avoid traffic danger, and therefore the quality of the automobile lamp is an important guarantee for the night traffic safety.
Because the LED has the characteristics of high luminous efficiency, low power consumption, long service life, relatively low working temperature and the like, the LED is generally used as a luminous source of an automobile lamp at present.
In order to ensure the illumination intensity, the number of LEDs in the automobile lamp is different, the heat productivity of the automobile lamp is still quite large under the long-time use condition, if the heat dissipation measure is poor, the performance of the automobile lamp can be seriously influenced, even the automobile lamp is damaged, and great hidden danger is brought to traffic safety.
Therefore, it becomes very important how to design a safe and reliable automobile lamp.
Disclosure of Invention
In order to solve the above problems, the present invention provides an automobile lamp, and specifically, the automobile lamp 10 includes:
a base 11;
an LED light source 12 arranged at the middle position of the upper surface of the base 11;
the reflecting cup 13 is arranged on the upper surface of the base 11 and positioned outside the LED 12;
the heat radiating fins 14 are arranged on the upper surface of the base 11 and positioned outside the reflecting cup 13;
and the condensing lens 15 is arranged at the top end of the reflecting cup 13.
In one embodiment of the present invention, the base 11 is an aluminum material.
In one embodiment of the invention, the base 11 is provided with ventilation through holes.
In one embodiment of the invention, a filter screen is arranged in the ventilation through hole.
In one embodiment of the present invention, the reflector cup 13 is PPS material.
In one embodiment of the invention, the fins 14 are aluminum material.
In one embodiment of the invention, the outer surface of the heat sink 14 is provided with concave grooves.
In one embodiment of the present invention, the LED light source 12 comprises a plurality of LED lamps, wherein the LED lamps comprise:
a substrate 121;
the LED chip is fixedly connected to the substrate 121;
the silica gel layer includes: the first silica gel layer 122 and the second silica gel layer 124 are sequentially arranged on the upper surface of the LED chip, a plurality of spherical lenses 123 are further arranged between the first silica gel layer 22 and the second silica gel layer 124, and the yellow fluorescent powder is contained in the second silica gel layer 124 and the spherical lenses 123.
In an embodiment of the present invention, the refractive index of the first silicone rubber layer 122, the refractive index of the second silicone rubber layer 124, and the refractive index of the spherical lens 123 are sequentially increased.
In one embodiment of the present invention, the LED chip is a GaN-based blue chip.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the LED with high luminous efficiency as the luminous source of the automobile lamp, and can reduce the number of the LED while ensuring the illumination intensity so as to reduce the heat productivity of the whole automobile lamp, thereby ensuring the reliability of the automobile lamp.
Drawings
Fig. 1 is a schematic structural diagram of an automotive lamp according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an LED lamp according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a GaN-based blue light chip according to an embodiment of the invention;
FIG. 4A is a schematic diagram of an arrangement of a plurality of spherical lenses according to an embodiment of the present invention;
fig. 4B is a schematic diagram of another arrangement of a plurality of spherical lenses according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of an automotive lamp provided in an embodiment of the present invention, where the automotive lamp 10 includes:
a base 11;
an LED light source 12 arranged at the middle position of the upper surface of the base 11;
the reflecting cup 13 is arranged on the upper surface of the base 11 and positioned outside the LED 12;
the heat radiating fins 14 are arranged on the upper surface of the base 11 and positioned outside the reflecting cup 13;
and the condensing lens 15 is arranged at the top end of the reflecting cup 13.
The automobile lamp provided by the embodiment of the invention has the advantages of good heat dissipation effect and simple structure.
Example two
This embodiment is a further explanation of the present invention based on the first embodiment.
Preferably, the base 11 and the heat sink 14 are both made of aluminum material. The aluminum material has low density and low price, is a good heat dissipation material, and is widely used in electronic products.
Preferably, the base 11 is provided with a ventilation through hole. The ventilation through holes can exhaust part of heat generated by the LED light sources 12 in the automotive lamp 10, so as to reduce the temperature inside the automotive lamp 10. Wherein, be provided with the filter screen in the ventilative through-hole, this filter screen can prevent that steam or dust from entering into inside the car lamps and lanterns 10 to play the guard action to the inner structure of car lamps and lanterns 10.
Preferably, the reflector cup 13 is a PPS material. PPS materials have the property of withstanding high temperatures. The LED light source 12 in the automotive lamp 10 generates a large amount of heat, which results in a high internal temperature at which the PPS material does not deform. In addition, the PPS material also has the characteristics of corrosion resistance, excellent mechanical property and the like, so the PPS material can be used as a material of a reflecting cup.
Further, the outer surface of the heat sink 14 is provided with concave grooves. The concave grooves formed on the exterior of the heat sink 14 can increase the heat dissipation area, thereby improving the heat dissipation efficiency of the entire vehicle lamp to quickly dissipate the heat generated by the LED light source 12.
Further, referring to fig. 2, fig. 2 is a schematic structural diagram of an LED lamp according to an embodiment of the present invention, where the LED lamp 12 includes: a substrate 121; the LED chip is fixedly connected to the substrate 121; specifically, the LED chip is a GaN-based blue light chip.
Further, the LED12 further includes a silica gel layer, where the silica gel layer in the embodiment of the present invention includes a first silica gel layer 122 and a second silica gel layer 124 sequentially disposed on the upper surface of the LED chip, that is, the silica gel layer in the embodiment of the present invention is composed of two silica gel layers, specifically, the first silica gel layer 122 is directly coated on the upper surface of the LED chip and directly contacts with the LED chip, the first silica gel layer 122 does not contain yellow phosphor, the second silica gel layer 124 is located above the first silica gel layer 122 and does not contact with the LED chip, and the second silica gel layer 124 contains yellow phosphor, so that the purpose of separating the LED chip from the phosphor is achieved, the LED chip is prevented from absorbing light reflected by the phosphor, and the light extraction efficiency is improved; and the blue light emitted by the LED chip is irradiated on the yellow fluorescent powder, and the light and the color are mixed to form white light. Therefore, in the present embodiment, the yellow phosphor is mixed into the second silica gel layer 124, so that the technical problem that the quantum efficiency of the phosphor is significantly reduced due to the direct contact between the yellow phosphor and the LED chip is solved.
Further, the LED chip is a GaN-based blue light chip, and the structure thereof is shown in fig. 3, and fig. 3 is a schematic structural diagram of the GaN-based blue light chip LED chip provided in the embodiment of the present invention; the layer 1 is a substrate material, the layer 2 is a GaN buffer layer, the layer 3 is an N-type GaN layer, the layers 4 and 6 are P-type GaN quantum well wide band gap materials, the layer 5 is an indan light emitting layer, the layer 7 is an AlGaN barrier material, the layer 8 is a P-type GaN layer, the thickness of the LED chip is between 90 and 140 micrometers, and the LED chip can be of other types.
Further, in the embodiment of the present invention, a plurality of spherical lenses 123 are further disposed between the first silica gel layer 122 and the second silica gel layer 124, specifically, a silica gel ball is first manufactured by using an upper hemispherical mold and a lower hemispherical mold, then the lower hemispherical mold is removed, the silica gel ball is placed in a hemispherical groove on the upper surface of the first silica gel layer 122, after high temperature setting, the upper hemispherical mold is removed, and the spherical lenses 123 are formed, wherein the size of the silica gel ball matches with the size of the hemispherical groove on the upper surface of the first silica gel layer.
In the embodiment of the present invention, a plurality of spherical lenses 123 are disposed on the first silica gel layer 122, and finally, the second silica gel layer 124 is disposed above the plurality of spherical lenses 123 and the first silica gel layer 122, referring to fig. 2 again, two adjacent spherical lenses 123 are connected by a silica gel strip, and the second silica gel layer 124 is isolated from the first silica gel layer 122. Therefore, in the embodiment of the invention, the plurality of spherical lenses 123 are additionally arranged between the first silica gel layer 122 and the second silica gel layer 124, so that the problem of light emission dispersion of the LED chip is solved, the light beam is more uniform in a concentration region, and the light emitting efficiency and the light emitting uniformity of the LED light emitting diode are improved.
Please refer to fig. 2 again, the distance between the bottom surface of the ball lens 123 and the upper surface of the LED chip in this embodiment is L, and preferably L is greater than 3 μm.
In the embodiment of the present invention, the plurality of spherical lenses 123 are "convex mirrors", and the focal length f of the convex mirrors is R/(2(n2-n1)), where n2 is the refractive index of the spherical lenses 123, n1 is the average of the refractive indexes of the first silica gel layer 122 and the second silica gel layer 124 (in the embodiment of the present invention, the refractive indexes of the upper silica gel layer and the lower silica gel layer of the spherical lenses 123 are close), and R is the radius of the spherical lenses 123.
In order to ensure that the light is not converged after exiting from the lens, and does not diverge, in the embodiment of the present invention, the height of the second silicone rubber layer 124 above the top surface of the ball lens 123 should be within 2 times of the focal length, that is, the thickness of the second silicone rubber layer 124 should be above the top surface R/(n2-n1) of the ball lens 123, and in practical applications, the thickness of the second silicone rubber layer 124 is generally 50 to 500 micrometers higher than the top surface of the ball lens 123.
Because the light emitted by the LED is distributed in a divergent manner, the LED light beam needs to be shaped by an external lens, so that the production cost is increased, and in order to solve the technical problem, in the embodiment of the present invention, the upper surface of the second silica gel layer 124 is in an arc shape, specifically, in the embodiment of the present invention, the upper surface of the second silica gel layer 124 is made into an arc shape by using a hemispherical mold, and the arc shape may be a hemispherical shape, a parabolic shape or a flat shape, wherein the hemispherical light-emitting angle is the largest, and the present invention is suitable for general illumination application; the parabolic light-exit angle is minimal and suitable for local lighting applications; and a flat shape between the two, suitable for indicating illumination. Therefore, the specific shape can be selected according to the application place of the product so as to achieve the best use effect. The second silica gel has the effect of the lens due to the appearance structure with the high middle and the low two sides, and when light irradiates the surface of the second silica gel layer 124, the light is more concentrated and uniform through the shaping of the second silica gel layer 124, no external lens is required to be added, and the production cost is reduced.
In this embodiment, in order to better enable the GaN-based blue light chip to excite the yellow phosphor powder to emit white light, in this embodiment, the plurality of spherical lenses 123 each contain the yellow phosphor powder, specifically, a light beam emitted by the GaN-based blue light chip first irradiates the first silica gel layer 122 and then irradiates the spherical lens 123, and the spherical lens 123 can change the propagation direction of the light, thereby effectively suppressing the total reflection effect, facilitating more light to be emitted outside the LED, and improving the light emitting efficiency of the LED. Because the spherical lens 123 and the second silica gel layer 124 both contain yellow fluorescent powder, light beams emitted by the GaN-based blue light chip can be irradiated on more yellow fluorescent powder, so that the LED light-emitting effect is better, and the technical problem of poor LED light-emitting effect caused by insufficient fluorescent powder is avoided.
It should be noted that, in order to ensure that the light beam emitted by the GaN-based blue light chip is continuously expanded, not only the spherical lenses 123 capable of expanding the irradiation range and the arc-shaped upper surface of the second silica gel layer 124 need to be provided, but also the following conditions in terms of materials need to be satisfied: the refractive index of the first encapsulation layer 122 is smaller than that of the second encapsulation layer 124, and the refractive index of the ball lens 123 is larger than that of the second encapsulation layer 124. Specifically, in the embodiment of the present invention, the arrangement mode in which the refractive index of the silica gel layer increases from bottom to top in sequence can better suppress the total reflection phenomenon, and the smaller the refractive index of the second encapsulation layer 124, the better the refractive index is, so as to avoid the formation of a refractive index difference between the second encapsulation layer 124 and the outside air, which leads to total reflection.
In the embodiment of the present invention, the lens silicone material of the plurality of ball lenses 123 may be a mixture of polycarbonate, polymethylmethacrylate and glass, and the refractive index of the ball lenses 123 may be adjusted according to different components. The material of the second silicone rubber layer 124 may be a mixture of methyl silicone rubber and phenyl high refractive index silicone rubber, and in the embodiment of the present invention, the smaller the refractive index of the second silicone rubber layer 124, the better, with 1.5 as an upper limit. Therefore, when the light emitted by the GaN-based blue light chip is radiated outwards, better light-emitting rate can be obtained, and the light is more uniform in the irradiation area.
It should be noted that, because the first silica gel layer 122 is directly coated on the LED chip and needs to be able to withstand a large amount of heat emitted from the LED chip, the first silica gel layer 122 contacting the LED chip is made of high temperature resistant silica gel, so that the problem of transmittance reduction caused by aging and yellowing of the silica gel due to heating can be avoided.
In addition, the yellow phosphor in the embodiment of the invention can adopt (Y, Gd)3(Al,Ga)5O12:Ce、(Ca,Sr,Ba)2SiO4:Eu、AESi2O2N2Eu, M-alpha-SiAlON, Eu and the like, and after light rays penetrate through the spherical lens 123 and the second silica gel layer 124, the yellow fluorescent powder is excited, so that the wavelength range of the fluorescent light emitted by the yellow fluorescent powder is 570nm-620 nm.
In the embodiment of the present invention, the size of the ball lens 123 is limited, and if the size of the ball lens 123 is too small, the ball lens cannot perform a light-gathering function, and if the size of the ball lens 123 is too large, the illumination is not uniform, so that in the embodiment, the diameter 2R of the ball lens 123 is between 10 and 200 micrometers, and the plurality of ball lenses 123 are uniformly spaced, that is, the pitches are equal, in the embodiment, the pitch a between two adjacent ball lenses 123 is 10 to 200 micrometers, preferably, the pitch a between two adjacent ball lenses is between 5 micrometers and 10 micrometers, and in the embodiment of the present invention, the smaller the pitch between two adjacent ball lenses 123 is, the better.
It should be noted that, in the embodiment of the present invention, the intervals between the plurality of spherical lenses 123 may not be equal, which is based on actual requirements in industrial production.
It should be noted that, in the embodiment of the present invention, the spherical lens 123 shapes the light irradiated by the GaN-based blue light chip, so as to make the light beam more concentrated, please refer to fig. 4A, where fig. 4A is an arrangement schematic diagram of a plurality of spherical lenses provided in the embodiment of the present invention, in the structure, a plurality of spherical lenses 23 formed on the first silica gel layer 122 may be uniformly arranged in a rectangular shape; further, referring to fig. 4B, fig. 4B is another schematic arrangement diagram of a plurality of spherical lenses according to an embodiment of the present invention, in the structure, the plurality of spherical lenses 23 formed on the first silica gel layer 122 may also be uniformly arranged in a diamond shape, and in addition, the arrangement manner of the plurality of spherical lenses 123 may also be a circular shape, an elliptical shape, or an irregular shape, so as to ensure that the light of the LED is uniformly distributed in a concentrated region to the maximum extent, which is not limited in the embodiment of the present invention.
Because the LED chip contacts the substrate 121 and the substrate 121 dissipates heat, the substrate 121 in the embodiment of the present invention is a solid aluminum plate with good heat dissipation performance, the aluminum plate has large heat capacity and good heat conduction effect, and the thickness of the substrate 121 is between 0.5mm to 10mm, and the substrate 121 with a thick thickness can prevent the substrate from being deformed by heat, thereby solving the technical problems of loose contact with the LED chip and poor heat dissipation effect caused by the substrate deformation by heat.
In the embodiment of the present invention, the led module further includes a bracket, and the substrate 121 is fixed on the bracket by a snap or an adhesive.
In the embodiment, the structure and the material of the automobile lamp are optimally designed, so that the aim of rapid heat dissipation is fulfilled; in addition, the packaging structure of the LED lamp is optimally designed, so that the luminous efficiency of the LED lamp is greatly improved, the normal brightness is ensured, the quantity of the LED lamps in the automobile lamp can be properly reduced, the heat generated by the automobile lamp is reduced, and the internal temperature of the automobile lamp during working is reduced. The safety and reliability of the automobile lamp can be greatly improved through the measures.
The foregoing is a more particular description of embodiments of the invention, as illustrated in the accompanying drawings, in which reference should be made to the specific embodiments illustrated in the accompanying drawings. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. An automotive light fixture (10), comprising:
a base (11);
the LED light source (12) is arranged at the middle position of the upper surface of the base (11);
the reflecting cup (13) is arranged on the upper surface of the base (11) and is positioned on the outer side of the LED (12);
the radiating fin (14) is arranged on the upper surface of the base (11) and is positioned outside the reflecting cup (13);
the condensing lens (15) is arranged at the top end of the reflecting cup (13);
the LED light source (12) comprises a plurality of LED lamps, wherein the LED lamps comprise:
a substrate (121);
the LED chip is fixedly connected to the substrate (121);
the silica gel layer includes: a first silica gel layer (122) and a second silica gel layer (124) sequentially arranged on the upper surface of the LED chip, and a plurality of spherical lenses (123) are further arranged between the first silica gel layer (122) and the second silica gel layer (124), wherein the second silica gel layer (124) and the plurality of spherical lenses (123) both contain yellow fluorescent powder, the refractive index of the first silica gel layer (122), the refractive index of the second silica gel layer (124) and the refractive index of the spherical lenses (123) are sequentially increased, the focal length of the spherical lenses (123) is f = R/(2(n2-n1)), wherein n2 is the refractive index of the spherical lenses (123), n1 is the average of the refractive indexes of the first silica gel layer (122) and the second silica gel layer (124), R is the radius of the spherical lenses (123), and the distance that the top surface of the second silica gel layer (124) is higher than the top surface of the spherical lenses (123) is R/(n2- n 1).
2. Automotive light fixture (10) according to claim 1, characterised in that the base (11) is of aluminium material.
3. Automotive light fixture (10) according to claim 1 or 2, characterised in that the base (11) is provided with a venting through hole.
4. Automotive light fixture (10) according to claim 3, characterised in that a filter screen is arranged in the venting through hole.
5. Automotive light fixture (10) according to claim 1, characterised in that the reflector cup (13) is of PPS material.
6. Automotive light fixture (10) according to claim 1, characterised in that the heat sink (14) is of aluminium material.
7. Automotive light fixture (10) according to claim 1 or 6, characterised in that the outer surface of the heat sink (14) is provided with concave grooves.
8. The automotive lamp (10) of claim 1, wherein the LED chip is a GaN-based blue chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711210775.1A CN108006583B (en) | 2017-11-28 | 2017-11-28 | Automobile lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711210775.1A CN108006583B (en) | 2017-11-28 | 2017-11-28 | Automobile lamp |
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| Publication Number | Publication Date |
|---|---|
| CN108006583A CN108006583A (en) | 2018-05-08 |
| CN108006583B true CN108006583B (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711210775.1A Active CN108006583B (en) | 2017-11-28 | 2017-11-28 | Automobile lamp |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205480519U (en) * | 2016-02-18 | 2016-08-17 | 中山市久能光电科技有限公司 | Can improve illumination intensity's LED lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8764504B2 (en) * | 2011-02-25 | 2014-07-01 | Semiconductor Energy Laboratory Co., Ltd. | Lighting device and method for manufacturing the same |
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- 2017-11-28 CN CN201711210775.1A patent/CN108006583B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205480519U (en) * | 2016-02-18 | 2016-08-17 | 中山市久能光电科技有限公司 | Can improve illumination intensity's LED lamp |
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| CN108006583A (en) | 2018-05-08 |
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Effective date of registration: 20201026 Address after: 343100 Wutong Road, Fenghuang Industrial Park, Ji'an County, Ji'an, Jiangxi Applicant after: Ji'an Jianwei paper plastic products packaging Co., Ltd Address before: 710065 No. 86 Leading Times Square (Block B), No. 2, Building No. 1, Unit 22, Room 12202, No. 51, High-tech Road, Xi'an High-tech Zone, Shaanxi Province Applicant before: Xi'an Cresun Innovation Technology Co.,Ltd. |
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Effective date of registration: 20210707 Address after: No.138 Junye Road, East District, Guangzhou Economic and Technological Development Zone, Guangzhou, Guangdong 510730 Patentee after: GUANGZHOU STANLEY ELECTRIC Co.,Ltd. Address before: 343100 Wutong Road, Fenghuang Industrial Park, Ji'an County, Ji'an, Jiangxi Patentee before: Ji'an Jianwei paper plastic products packaging Co., Ltd |
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