CN210511116U

CN210511116U - LED lamp

Info

Publication number: CN210511116U
Application number: CN201921154541.4U
Authority: CN
Inventors: 陈进华
Original assignee: Shenzhen Show Knight Technology Co ltd
Current assignee: Shenzhen Show Knight Technology Co ltd
Priority date: 2019-07-20
Filing date: 2019-07-20
Publication date: 2020-05-12
Anticipated expiration: 2029-07-20

Abstract

The utility model discloses a LED lamp relates to the illumination lamps and lanterns field, and its technical scheme main points are, including body, LED lamp piece and setting at body both ends lamp stand, there is the electricity post that connects on the lamp stand, and the body includes first fluorescent tube and the second fluorescent tube of diameter difference, and in the lamp stand was inserted at the both ends of first fluorescent tube and second fluorescent tube, the internally mounted of first fluorescent tube had the PCB board, and LED lamp piece is even arranges on two faces of PCB board, and LED lamp piece is electrically conductive with the lamp stand after parallelly connected, first fluorescent tube and second fluorescent tube are made by PC plastic materials, have self-made organosilicon microballon granule among the PC plastic materials. The technical effect is that 1, the light scattering property and the transmission property of the lamp tube are better, after the light beam of the light source irradiates, the whole lamp emits softer light, and the comfortable effect of light transmission and opaqueness is achieved; 2. the lamp tube has the advantages of good diffusion effect, good weather resistance, ultraviolet resistance, no yellowing, excellent heat resistance, and no dark spots or dark shadows after long-term irradiation.

Description

LED lamp

Technical Field

The utility model relates to an illumination lamps and lanterns field, in particular to LED lamp.

Background

In order to make the luminous efficiency of the LED lamp uniform, a proper light source needs to be selected, and the LED lamp beads are more used in the prior art, and the types of the LED lamp beads are better. For example, the light emitting angles of different types of lamp beads are different for a straw hat-shaped LED lamp, a round-head LED lamp, a square LED lamp bead and a patch-type LED lamp bead, so that a design scheme is required to be made according to practical application. The surface-mounted LED lamp beads emit light in the front or side direction, and are more in use of LED lamps.

At present, chinese patent publication No. CN103256504A discloses an LED plastic lamp tube, which includes a tube body, LED lamp pieces, and lamp sockets disposed at two ends of the tube body, wherein the lamp sockets are provided with electrical connection posts, and two ends 3 of the tube body are inserted into the lamp sockets; the tube body is made of a plastic material; the diffusion film surrounds the inner wall of the tube body; and the two parallel planes in the length direction of the light guide body are respectively provided with an LED lamp sheet, and the LED lamp sheets are connected in parallel and then are connected with the electric connection post on the lamp holder.

The light guide body in the lamp tube structure is sheet-shaped, the LED lamp sheets are arranged on two planes of the light guide body, namely the LED lamp sheets adopt surface-mounted LED lamp beads emitting light in the forward direction. Because the fluorescent tube is circular, each LED lamp pearl is not equal apart from the inner wall length of body, that is to say that the transmission path length that the light beam that LED lamp pearl emitted propagated to the fluorescent tube inner wall is different, and the angle of light beam reflection is also different, and the regional luminance that the fluorescent tube is located LED lamp pearl side direction is less than the regional luminance that the fluorescent tube is located LED lamp pearl forward direction, has formed dark spot region for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a LED lamp, its advantage that has the light diffusion performance of preferred, the luminousness of preferred and no dark spot.

The above technical purpose of the present invention can be achieved by the following technical solutions:

an LED lamp comprises a tube body, LED lamp pieces and lamp holders arranged at two ends of the tube body, wherein electric connection posts are arranged on the lamp holders, the tube body comprises a first lamp tube and a second lamp tube which are different in diameter, two ends of the first lamp tube and two ends of the second lamp tube are inserted into the lamp holders, a PCB is arranged inside the first lamp tube, the LED lamp pieces are uniformly arranged on two plate surfaces of the PCB, the LED lamp pieces are in conductive connection with the lamp holders after being connected in parallel, the first lamp tube and the second lamp tube are made of PC plastic materials, and organic silicon microsphere particles are arranged in the PC plastic materials;

the particle sizes of the organic silicon microsphere particles between the inner side and the outer side in the first lamp tube are different, and the organic silicon microsphere particles in the first lamp tube refract light beams inside for multiple times and conduct the light beams to the second lamp tube;

the particle size of the microspheres in the second lamp tube is smaller than that of the minimum organic silicon microsphere particles in the first lamp tube, and the second lamp tube is also provided with a plurality of micropores, and the micropores and the organic silicon microsphere particles refract and reflect light beams for multiple times in the second lamp tube and are led out from the outer wall of the second lamp tube.

Further setting: the particle size of the microsphere particles facing the inner side of the first lamp tube is smaller than that of the microspheres facing the outer side.

Further setting: the particle size of the microspheres on the inner side of the first lamp tube is 5 micrometers, and the particle size of the microspheres on the outer side of the first lamp tube is 2 micrometers.

Further setting: the particle size of the microspheres in the second lamp tube is 1 μm.

Further setting: the diameter of the first lamp tube is 26mm, and the diameter of the second lamp tube is 40 mm.

By adopting the technical scheme, the LED lamp is provided with the two lamp tubes with different diameters, the organic microsphere particles of the first lamp tube with the smaller diameter can refract light beams emitted by the LED lamp piece, and the scattering light intensity of the system is closely related to the particle size and the refractive index of the particles relative to the surrounding medium when the spherical particles are uniformly dispersed in the PC plastic due to the fact that the sizes of the organic microsphere particles on the inner side and the outer side of the first lamp tube are different. In a certain extent, the particle diameter is big more, the refractive index difference is big more, then scattered light intensity is big more, that is to say the luminousness increases along with the increase of particle diameter gradually, certain scattering power can be ensured to the organic microballon granule of the big or small particle diameter of first fluorescent tube, make anisotropy according to the sphere of self, the light beam is through forming irregular refraction, the light beam of the LED lamp pearl with forward light-emitting is via the refraction of first fluorescent tube, the light beam conduction after the refraction is many to the refraction direction on the second fluorescent tube, the angle is big, the light beam of compensation LED lamp pearl lateral direction.

The particle size of the organic microsphere particles on the second lamp tube is relatively small, the refractive index difference is small, the scattering light intensity is smaller, namely the light transmittance is gradually reduced along with the reduction of the particle size, namely the haze of the second lamp tube is relatively improved, the light emitted by the second lamp tube is more uniform and soft, and the phenomena of glare, condensation and dark spots are avoided; because the inside of second fluorescent tube has the micropore, refracts after the light beam gets into the second fluorescent tube of making by PC, can refract after the light beam gets into the micropore, refracts after the light beam gets into organic microballon granule, and the light beam can produce refraction many times in the second fluorescent tube for the second fluorescent tube light-emitting is even.

Another object of the present invention is to provide a method for manufacturing a lamp tube of an LED lamp, wherein the manufactured lamp tube has the advantages of better light diffusion performance, better light transmittance and no dark spot.

a preparation method of a lamp tube of an LED lamp comprises the following steps:

s01, selecting PC with a refractive index of 1.585, selecting organic silicon microspheres with a refractive index of 1.43, and selecting microspheres with particle sizes of 1, 2 and 5 micrometers respectively;

s02, preparing a first lamp tube, drying PC for 9h at 106 ℃, selecting microspheres with the particle size of 5 mu m, weighing the PC, mixing at high speed, extruding and granulating to prepare 3.8% and 5% of master batches; drying the obtained master batch in an oven at 102 ℃ for 6h, and directly mixing the dried master batch with pure PC according to the ratio of 1:25 for injection molding to obtain the master batch;

s03, infiltrating, namely selecting microspheres with the particle size of 2 microns, adding a lateral feeder on an extruder for preparing the first lamp tube, and infiltrating the microspheres with the particle size of 2 microns into the first lamp tube;

s04, preparing a second lamp tube, drying the PC for 8h at 110C, mixing the microspheres with the particle size of 1 μm and the dried 500g of PC according to the ratio of 1:25, adding other reagents, and adding the stirred mixture into an injection molding machine for direct injection molding.

By adopting the technical scheme and the method, the microspheres with different particle sizes can be conveniently permeated by a lateral feeder during the molding of the first lamp tube, the manufactured first lamp tube is integrally molded, no obvious boundary line exists in the middle, and no dark spots are formed.

Further setting: in step S02, an extruder is used for molding, having a plurality of heating zones, one zone temperature: 200 ℃, temperature in zone two: 220 ℃, three-zone temperature: 240 ℃, four zone temperature: 240 ℃; injection pressure: 120 MPa; injection speed: 60cm³/s；

By adopting the technical scheme, the heating parameter in the injection molding process determines the molding quality, and the PC has the best mechanical property under the process condition, particularly the bending property and the impact strength of the PC.

Further setting: the lateral feeding inlets of the lateral feeder are uniformly arranged on the inner wall or the outer wall of the lamp tube.

By adopting the technical scheme, the organic silicon microspheres with different particle sizes can be conveniently added in the inner side or the outer side in the process of molding the first lamp tube.

Further setting: in step S04, the other reagents include 4g of an antioxidant, 4g of liquid paraffin, 1g of a fluorescent brightener, 1g of a foaming agent, and 1g of an ultraviolet absorber.

By adopting the technical scheme, the weather resistance is good, the ultraviolet resistance is good, the yellowing is avoided, the heat resistance is excellent, and the adopted foaming agent enables the micropores to be formed more easily.

Further setting: in step S01, the preparation method of the silicone microspheres is: adding a certain amount of vinyl trimethoxy silane, deionized water and polyvinyl pyrrolidone into a 250mL three-neck flask provided with a thermometer and a stirrer, placing the reaction flask into a water bath kettle, and controlling the temperature; slowly dripping hydrochloric acid to control the pH value of the system and starting hydrolysis reaction. Then adding a proper amount of ammonia water into the three-neck flask, adjusting the pH value, and starting the polymerization reaction; and after the reaction is finished, carrying out suction filtration, washing and vacuum drying at 50 ℃ for 10h to obtain the organic silicon microspheres, wherein the refractive index of the organic silicon microspheres is 1.43.

By adopting the technical scheme, the organic silicon microspheres with the refractive index of 1.43 and different particle sizes are prepared by self.

To sum up, the utility model discloses following beneficial effect has: 1. the light scattering property and the transmission property of the lamp tube are better, after the light beam of the light source irradiates, the whole lamp emits softer light, and the comfortable effect of light transmission and opaqueness is achieved;

2. the lamp tube has the advantages of good diffusion effect, good weather resistance, ultraviolet resistance, no yellowing, excellent heat resistance, and no dark spots or dark shadows after long-term irradiation.

Drawings

FIG. 1 is a schematic view of a lamp tube;

FIG. 2 is a schematic view of the internal structure of the lamp tube;

FIG. 3 is a schematic cross-sectional view of a lamp tube;

FIG. 4 is a schematic view of the refraction of a light incident PC substrate;

FIG. 5 is a schematic diagram showing the effect of the particle size of the silicone microspheres on the optical performance of the lamp tube;

FIG. 6 is a schematic diagram showing the effect of silicone microspheres with different particle sizes on haze of a PC lamp tube.

In the figure, 1, a tube body; 2. a lamp socket; 3. an electrical connector; 4. a first lamp tube; 5. a second lamp tube; 6. a PCB board; 7. an LED lamp sheet; 8. microspheres; 9. and (4) micro-pores.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

First preferred embodiment:

a preparation method of organic silicon microspheres comprises the steps of adding a certain amount of vinyl trimethoxy silane, deionized water and polyvinylpyrrolidone into a 250mL three-neck flask provided with a thermometer and a stirrer, placing the reaction flask in a water bath kettle, and controlling the temperature; slowly dripping hydrochloric acid to control the pH value of the system and starting hydrolysis reaction. Then adding a proper amount of ammonia water into the three-neck flask, adjusting the pH value, and starting the polymerization reaction; and after the reaction is finished, performing suction filtration, washing and vacuum drying at 50 ℃ for 10 hours to obtain the organic silicon microspheres 8, wherein the refractive index of the organic silicon microspheres 8 is 1.43.

Second preferred embodiment:

a method for manufacturing a lamp tube comprises the steps of selecting PC with the refractive index of 1.585, selecting organic silicon microspheres 8 with the refractive index of 1.43 and selecting the microspheres 8 with the particle sizes of 1 micrometer, 2 micrometers, 5 micrometers and 10 micrometers respectively.

First, prepare the first lamp tube

Firstly, drying PC at 106 ℃ for 9h, selecting microspheres 8 with the particle size of 5 microns, weighing the PC, mixing at high speed, extruding and granulating to prepare master batches with the particle sizes of 3.8% and 5%; drying the obtained master batch in an oven at 102 ℃ for 6h, and directly mixing the dried master batch with pure PC according to the ratio of 1:25 for injection molding to obtain the master batch;

II, infiltration

Microspheres 8 with a particle size of 2 μm are selected to permeate into the first lamp tube 4. In an extruder, there are multiple heating zones, one zone temperature: 200 ℃, temperature in zone two: 220 ℃, three-zone temperature: 240 ℃, four zone temperature: 240 ℃; injection pressure: 120 MPa; injection speed: 60cm 3/s;

a lateral feeding machine is added on an extruder for preparing the first lamp tube 4, master batches of microspheres 8 with the particle size of 1 mu m are added in the lateral feeding process and are fed into the extruder for molding, and feeding holes for the lateral feeding are required to be uniformly arranged on the inner wall or the outer wall of the lamp tube.

Thirdly, preparing a second lamp tube

Drying PC for 8 hours at 110 ℃, then respectively mixing a certain amount of microspheres 8 with 500g of dried PC according to the ratio of 1:25, adding other reagents comprising 4g of antioxidant, 4g of liquid paraffin, 1g of fluorescent whitening agent, 1g of foaming agent and 1g of ultraviolet absorbent, and fully and uniformly stirring; adding the stirred mixture into an injection molding machine for direct injection molding to obtain the product;

third preferred embodiment:

the utility model provides a LED lamp, including body 1, LED lamp piece 7 and setting are at 1 both ends lamp stand 2 of body, there is electricity post 3 on the lamp stand 2, body 1 includes first fluorescent tube 4 and second fluorescent tube 5 that the diameter is different, the outside at first fluorescent tube 4 is established to second fluorescent tube 5 cover, the both ends of first fluorescent tube 4 and second fluorescent tube 5 insert in the lamp stand 2, the internally mounted of first fluorescent tube 4 has PCB board 6, the even arrangement of LED lamp piece 7 is on two faces of PCB board 6, parallelly connected back of LED lamp piece 7 is connected with lamp stand 2 electrically conductive connection.

The first lamp tube 4 and the second lamp tube 5 are both made of a PC plastic material, wherein organic silicon microspheres 8 are mixed in the PC plastic material.

Specifically, the PC plastic material of the first lamp tube 4 is mixed with microspheres 8 having different particle sizes, the inner and outer microspheres 8 of the first lamp tube 4 have different particle sizes, and the particle size of the inner microspheres 8 is smaller than that of the outer microspheres 8. Preferably, the particle size of the microspheres 8 in the inner layer of the first lamp tube 4 is 5 μm, the particle size of the microspheres 8 at the outer side of the first lamp tube 4 is 2 μm, the PC plastic material of the second lamp tube 5 contains the microspheres 8 with the same particle size, the particle size of the microspheres 8 is 1 μm, and the second lamp tube 5 has uniformly distributed micropores 9 and the microspheres 8.

When the light beam of the PC material passes through the first lamp tube 4, the organic silicon microsphere 8 particles in the first lamp tube 4 refract the light beam for multiple times inside and transmit the light beam to the second lamp tube 5; the micro-holes 9 and the organic silicon micro-sphere 8 particles in the second lamp tube 5 refract and reflect the light beam for multiple times in the second lamp tube, and the light beam is led out from the outer wall of the second lamp tube 5.

Specifically, referring to fig. 4, when light enters the PC lamp, there are two refraction modes: when pores exist between the organic silicon microsphere 8 particles and the matrix, refraction is carried out in a mode; when the aperture is reduced until it disappears, refraction proceeds in the b-mode. When an incident ray is refracted in the a-mode, 3 refractions occur: 1) refraction occurs when entering the PC matrix; 2) refraction occurs at the aperture; 3) and refracts with the light diffusing agent. When an incident ray is refracted in b-mode, 2 refractions occur: 1) refraction occurs when entering the PC matrix; 2) refracts with the organic silicon microsphere 8 particles. From the definition of haze, the percentage of the ratio of the transmittance of light deviating from the incident light to the luminous flux transmitted through the material, the more times the light is refracted in the PC substrate, the greater the haze. The larger the particle size of the silicone microspheres 8 is, the smaller the pores between the silicone microspheres and the PC matrix are, and when the particle size is increased, the refraction mode is changed from the mode a to the mode b, the refraction times are reduced, and the haze is reduced along with the increase of the particle size.

According to the first, second and third preferred embodiments, the influence of the grain size of the silicone microspheres on the optical performance of the lamp tube is tested:

as can be seen from fig. 5, the light transmittance of the lamp tube is increased with the increase of the particle size of the silicone microspheres 8. Compared with the lamp tube prepared from the 1-micron light-dispersing agent, the light transmittance of the lamp tube prepared from the organosilicon microspheres 8 with the particle size of 2 microns is remarkably improved. Meanwhile, when the particle size of the organic silicon microspheres 8 is further increased, the improvement range of the light transmittance of the lamp tube is slowed down to some extent.

The phenomenon that the light transmittance of the lamp tube increases with the increase of the particle size of the organic silicon microspheres 8 can be explained by the following theory: the particle size of the organosilicon microspheres 8 used in the test is 1-10 μm, and is larger than the wavelength of visible light (380-780 nm), so that the scattering effect of the organosilicon microspheres on the light can be explained by using the Mie scattering theory. According to Mie-ray theory, when spherical particles are uniformly dispersed in PC, the scattering intensity (i.e., total light transmittance) of the system is closely related to the particle size and the refractive index of the particles relative to the surrounding medium. Within a certain range, the larger the particle size is, the larger the refractive index difference is, the larger the scattering light intensity of the organic silicon microsphere 8 is. In the experiment, the organosilicon microspheres 8 are adopted, and the refractive indexes of the particles relative to the surrounding medium are the same, so that the light transmittance is gradually increased along with the increase of the particle size.

as shown in fig. 6, the haze of the PC lamp tube gradually decreases with the increase of the particle size of the silicone microspheres 8, and the decrease is shown as slow first and fast second. When the particle size of the organic silicon microspheres 8 is 2 μm or less, the haze of the PC lamp tube is slowly reduced along with the increase of the particle size, and when the particle size of the organic silicon microspheres 8 is larger than 2 μm, the haze of the PC lamp tube is rapidly reduced along with the increase of the particle size.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims

1. The utility model provides a LED lamp, including body (1), LED lamp piece (7) and setting are in body (1) both ends lamp stand (2), there is electric connector (3) on lamp stand (2), body (1) is including first fluorescent tube (4) and second fluorescent tube (5) that the diameter is different, insert in lamp stand (2) at the both ends of first fluorescent tube (4) and second fluorescent tube (5), the internally mounted of first fluorescent tube (4) has PCB board (6), the even arrangement of LED lamp piece (7) is on two faces of PCB board (6), parallelly connected back and lamp stand (2) electrically conductive connection of LED lamp piece (7), its characterized in that: the first lamp tube (4) and the second lamp tube (5) are made of a PC plastic material, and organic silicon microsphere (8) particles are arranged in the PC plastic material;

the particle sizes of the organic silicon microsphere (8) particles between the inner side and the outer side in the first lamp tube (4) are different, and the organic silicon microsphere (8) particles in the first lamp tube (4) refract light beams for multiple times inside and conduct the light beams to the second lamp tube (5);

the particle size of the microspheres (8) in the second lamp tube (5) is smaller than the particle size of the minimum organic silicon microspheres (8) in the first lamp tube (4), a plurality of micropores (9) are further formed in the second lamp tube (5), and the micropores (9) and the particles of the organic silicon microspheres (8) refract and reflect light beams inside for multiple times and are led out from the outer wall of the second lamp tube (5).

2. The LED lamp of claim 1, wherein: the particle size of the microspheres (8) facing the inner side of the first lamp tube (4) is smaller than that of the microspheres (8) facing the outer side.

3. The LED lamp of claim 2, wherein: the particle size of the microspheres (8) on the inner side of the first lamp tube (4) is 5 micrometers, and the particle size of the microspheres (8) on the outer side of the first lamp tube (4) is 2 micrometers.

4. The LED lamp of claim 1, wherein: the particle size of the microspheres (8) in the second lamp tube (5) is 1 μm.

5. The LED lamp of claim 1, wherein: the diameter of the first lamp tube (4) is 26mm, and the diameter of the second lamp tube (5) is 40 mm.