CN103775850A - LED lighting device - Google Patents
LED lighting device Download PDFInfo
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- CN103775850A CN103775850A CN201210398216.9A CN201210398216A CN103775850A CN 103775850 A CN103775850 A CN 103775850A CN 201210398216 A CN201210398216 A CN 201210398216A CN 103775850 A CN103775850 A CN 103775850A
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- exit facet
- lighting device
- led lighting
- circuit board
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Abstract
The invention relates to an LED (Light-Emitting Diode) lighting device. The LED lighting device comprises a circuit board (1), wherein at least one row of LED chips (2) is arranged on one surface of the circuit board (1) in the longitudinal direction of the circuit board, and a packaging body (3) for encapsulating the one one surface of the circuit board (1) and the at least one row of LED chips, wherein the packaging body (3) comprises a reflecting surface (31) extending along the circuit board and away from the one one surface of the circuit board (1) in the longitudinal direction, and an emitting surface (32) facing the at least one row of LED chips (2) and connected with the reflecting surface (31), wherein the packaging body (3) is designed in such a manner that at least one part of light from the at least one row of LED chips (2) is emitted through the emitting surface (32) after being reflected through the reflecting surface (31) and the rest light is directly emitted through the emitting surface (32).
Description
Technical field
The present invention relates to a kind of LED lighting device.
Background technology
As everyone knows, LED illumination has irreplaceable advantage, and it saves the energy, super low-power consumption, and electric light power transfer approaches 100%, and identical illumination efficiency is more energy-conservation more than 80% than conventional light source, and its life-span is longer.In view of above advantage, people use LED more and more as light source.On current market, occurring a large amount of LED lamp strings, this LED lamp string comprises for this reason: circuit board, be arranged in the multiple LED chips on circuit board, and the packaging body that circuit board and LED chip are encapsulated.This packaging body is made up of transparent encapsulating compound, and unique function of this encapsulating compound is to provide waterproofing protection for LED lamp string.But in some application of LED lamp string, need the light of LED lamp string transmitting to there is less radiation angle, that is to say and need LED lamp string to there is better directive property.The LED lamp string occurring in prior art can not meet above-mentioned requirements completely.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of LED lighting device, the light that this LED lighting device reflects has the radiation angle diminishing, and then has good directive property.Its handling ease, simple in structure simultaneously, and have very little cost of raw materials used.
Object of the present invention realizes thus by a kind of LED lighting device, and this LED lighting device comprises circuit board, at least a line LED chip of arranging along the longitudinal direction of circuit board on a surface of circuit board, and seal at least packaging body of a line LED chip of surface of circuit board and this, wherein, packaging body comprise respectively in a longitudinal direction along circuit board extend and away from this of circuit board surperficial reflecting surface LED with in the face of this line LED chip be connected the exit facet of reflecting surface at least, wherein, packaging body be designed to by from this at least at least part of light of a line LED chip reflect by reflecting surface after by exit facet outgoing, remaining light is by the direct outgoing of exit facet, make from this at least the light of a line LED chip with the radiation angle that diminishes from exit facet outgoing.In design of the present invention, every row LED chip comprises at least two LED chips, wherein from the part light of a line LED chip at least, especially first the light that has a larger angle with respect to the optical axis of LED chip can incide on reflecting surface, and reflecting surface can will change the angle of emergence of light of this incident, make this part light can be with the radiation angle outgoing from exit facet diminishing.And directly thering is very little angle by the light of exit facet outgoing itself with respect to optical axis, it mixes with the light that reflects rear outgoing by reflecting surface.At this, the radiation angle diminishing means the radiation angle of the light by be less than the packaging body outgoing by lighting device of the prior art according to the radiation angle of the light of the packaging body outgoing of lighting device of the present invention.
Propose according to the present invention, reflector design is the surface that is away from gradually the optical axis extension of LED lighting device in the direction away from circuit board.Form and be similar to flaring profile in cross section according to the packaging body of LED lighting device of the present invention, circuit board is positioned at the bottom of this flaring profile.The packaging body of this kind of profile plays in fact the effect of optically focused, namely the light originally with the larger angle of emergence is converged to the light with the less angle of emergence.
Further propose according to the present invention, reflector design is linear slope.This linear slope is more prone to carry out processing and manufacturing.
Preferably, reflector design is curved surface.In the time that reflector design is become to curved surface, packaging body is more similar to bowl-shape on cross section.The reflecting surface of curved surface can be matched with the light that LED chip sends more well, thereby obtains better directive property.
Advantageously, reflector design is total internal reflection surface.The light inciding on reflecting surface can all be reflected away, thereby has reduced the light loss of LED lighting device.
Preferably, exit facet is designed to plane.The exit facet of plane is easy to processing and manufacturing more.
Optionally, exit facet also can be designed to curved surface, for example recessed towards the direction of a line LED chip at least or outstanding away from the direction of a line LED chip at least.
A preferred design according to the present invention proposes, exit facet has the first exit facet and the second exit facet in the first exit facet both sides, wherein the first exit facet with respect to the second exit facet more near a line LED chip at least, thereby in packaging body, form recessed region.Advantageously, recessed region has square cross section, and the first exit facet is formed at least bottom of a line LED chip of facing of recessed region.Such packaging body is encapsulated in wherein reliably on the surface guaranteeing chip and circuit board, and when guaranteeing the optical property of requirement, can also reduce as much as possible and encapsulate needed material quantity, has reduced cost.
Advantageously, the second exit facet is designed to plane, and the first exit facet and the second exit facet are parallel to respectively circuit board.
Preferably, packaging body is made up of PU glue or silica gel or epoxy resin.
It should be understood that the feature of different exemplary embodiment described herein can be bonded to each other if do not have other dated especially.
Accompanying drawing explanation
Accompanying drawing forms the part of this description, for helping further to understand the present invention.These accompanying drawings illustrate embodiments of the invention, and are used for illustrating principle of the present invention together with description.Identical parts represent with identical label in the accompanying drawings.Shown in figure:
Fig. 1 is according to the perspective view of LED lighting device of the present invention;
Fig. 2 is according to the sectional view of LED lighting device of the present invention.
The specific embodiment
In being discussed in more detail below, reference forms the accompanying drawing of the part of this description, wherein, shows and can implement specific embodiments of the invention in the mode of illustration.About figure, such as " on ", D score, " close ", " away from ", " side direction " directional terms uses with reference to the direction of described accompanying drawing.Because the assembly of the embodiment of the present invention can be placed on many different directions, thus direction term only for explanation, and without any restriction the meaning.It should be understood that and can use other embodiment, and can carry out structure or logical changes under the prerequisite that does not deviate from scope of the present invention.So, describes in detail and should not be understood to the restrictive meaning below, and the present invention is defined by the appended claims.
Fig. 1 shows according to the perspective view of LED lighting device 100 of the present invention, and as seen from the figure, this LED lighting device 100 comprises: circuit board 1; At least a line LED chip 2 of arranging along the longitudinal direction of circuit board 1 on a surface of circuit board 1; And seal surface 1 of circuit board and the packaging body 3 of a line LED chip 2 at least, packaging body 3 comprise respectively in a longitudinal direction along circuit board extend and away from this of circuit board 1 surperficial reflecting surface 31 with in the face of this line LED chip 2 be connected the exit facet 32 of reflecting surface 31 at least.LED lighting device 100 according to the present invention is especially designed to LED lamp string, packaging body 3 is own for circuit board 1 surface and this lip-deep at least a line LED chip 2 that is arranged in circuit board 1 are sealed, thereby makes LED lamp string have stronger water resistance.From figure, further, on circuit board 1, be furnished with unique a line LED chip 2, wherein in this row LED chip 2, include multiple LED chips, but, in other embodiment, on this surface of circuit board 1, also can arrange multirow LED chip 2.In addition, circuit board 1 itself also can be designed as flexible PCB.In design of the present invention, packaging body 3 is made up of PU glue or silica gel or epoxy resin.Certainly the transparent encapsulation material that, packaging body also can be applicable to encapsulating by other is made.
In addition, further from Fig. 1, there is special planform according to the packaging body 3 of LED lighting device 100 of the present invention, from figure, namely in the both sides of the circuit board 1 of the longitudinal direction of circuit board 1, the lateral layout of packaging body 3 becomes to tilt with respect to circuit board 1, thereby forms a kind of bowl-shape cross section profile that is similar to.This lateral layout becomes reflecting surface 31, especially total internal reflection surface, and the light inciding in total internal reflection surface can all be reflected away, thereby has reduced the light loss of LED lighting device 100.This reflecting surface 31 is for to inciding light on it by the effect of drawing in, thereby makes LED lighting device 100 launch the light with less radiation angle.
Next with reference to Fig. 2, the concrete structure of LED lighting device 100 of the present invention is set forth.Fig. 2 shows according to the sectional view of LED lighting device 100 of the present invention, the sectional view namely intercepting transverse to the longitudinal direction of LED lighting device 100.As seen from the figure, packaging body 3 comprise in a longitudinal direction along circuit board 1 extend and away from this of circuit board 1 surperficial reflecting surface 31 with in the face of a line LED chip 2 at least and be connected the exit facet 32 of reflecting surface 31, packaging body 3 passes through exit facet 32 outgoing after being designed at least part of light from LED2 to reflect by reflecting surface 31, remaining light is by the direct outgoing of exit facet 32, makes from the light of a line LED chip 2 at least with the radiation angle that diminishes from exit facet 32 outgoing.In design of the present invention, from the part light of a line LED chip 2 at least, especially first the light that has a larger angle with respect to the optical axis of LED2 can incide on reflecting surface 31, and reflecting surface 3 can will change the angle of emergence of light of this incident, make this part light can be with the radiation angle outgoing from exit facet diminishing.And directly thering is very little angle by the light of exit facet outgoing itself with respect to optical axis, it mixes with the light that reflects rear outgoing by reflecting surface 31.Make thus LED lighting device 100 can launch the light with less radiation angle.
From figure, further, reflecting surface 31 is designed to the surface of the optical axis extension that is away from gradually LED lighting device 100 in the direction away from circuit board 1.Preferably, reflecting surface 31 can be designed as linear slope, and this linear slope is more prone to carry out processing and manufacturing.In the preferred embodiment illustrating in the drawings, reflecting surface 31 is designed to curved surface.In the time that reflecting surface 31 is designed to curved surface, packaging body 3 is more similar to bowl-shape on cross section.The reflecting surface 31 of curved surface can be matched with the light that at least a line LED chip 2 sends more well, thereby obtains better directive property.
In a basic scheme of LED lighting device 100 of the present invention, exit facet 32 is designed to plane.The exit facet 32 of plane is easy to processing and manufacturing more.In the preferred embodiment illustrating in the drawings, exit facet 32 has the first exit facet 321 and the second exit facet 322 in the first exit facet 321 both sides, wherein the first exit facet 321 with respect to the second exit facet 322 more near a line LED chip 2 at least, thereby in packaging body 3, form recessed region.As seen from the figure, recessed region has square cross section, and the first exit facet 321 is formed on the bottom in the face of LED2 of recessed region.Such packaging body 3 is encapsulated at least a line LED chip 2 and circuit board 1 wherein reliably guaranteeing, and when guaranteeing the optical property of requirement, can also reduce as much as possible and encapsulate needed material quantity, has reduced cost.
But in unshowned other embodiment of the present invention, in order to obtain the optical effect of expection, exit facet also can be designed to curved surface, for example recessed towards the direction of a line LED chip 2 at least or outstanding away from the direction of a line LED chip 2 at least.
The index path of the light that at least a line LED chip 2 is launched has been shown in Fig. 2 in addition.As seen from the figure, in the light that at least a line LED chip 2 is launched, a part is directly from the first exit facet 321 outgoing, other light incides on reflecting surface 31, after reflecting surface 31 these light of reflection, makes the angle of emergence from second exit facet 322 outgoing of this light to change.As seen from the figure, obviously launch towards the direction of optical axis through the light of the second exit facet 322 outgoing.This has dwindled the radiation angle of the light that LED lighting device 100 launches significantly, thereby makes the LED lighting device 100 according to the present invention obtain good directive property.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Reference number
1 circuit board
2 LED
3 packaging bodies
3 reflectings surface
32 exit facets
321 first exit facets
322 second exit facets
100 LED lighting devices
Claims (13)
1. a LED lighting device (100), comprising:
Circuit board (1);
At least a line LED chip (2) of arranging along the longitudinal direction of described circuit board on a surface of described circuit board (1);
And seal a described surface of described circuit board (1) and the packaging body (3) of described at least a line LED chip (2),
It is characterized in that,
Described packaging body (3) be included on described longitudinal direction along described circuit board (1) extend and away from a described surperficial reflecting surface (31) of described circuit board (1) with in the face of described at least a line LED chip (2) and be connected the exit facet (32) of described reflecting surface (31)
Wherein, described packaging body (3) is designed at least part of light from described at least a line LED chip (2) rear by described exit facet (32) outgoing by described reflecting surface (31) reflection, and remaining light is by directly outgoing of described exit facet (32).
2. LED lighting device according to claim 1 (100), is characterized in that, described packaging body (3) is designed to make from the light of described at least a line LED chip (2) with the radiation angle that diminishes from described exit facet (32) outgoing.
3. LED lighting device according to claim 1 (100), is characterized in that, described reflecting surface (31) is designed to the surface of the optical axis extension that is away from gradually described LED lighting device (100) in the direction away from described circuit board (1).
4. LED lighting device according to claim 3 (100), is characterized in that, described reflecting surface (31) is designed to linear slope.
5. LED lighting device according to claim 3 (100), is characterized in that, described reflecting surface (31) is designed to curved surface.
6. according to the LED lighting device (100) described in any one in claim 1 to 5, it is characterized in that, described reflecting surface (31) is designed to total internal reflection surface.
7. according to the LED lighting device (100) described in any one in claim 1 to 5, it is characterized in that, described exit facet (32) is designed to plane.
8. according to the LED lighting device (100) described in any one in claim 1 to 5, it is characterized in that, described exit facet (32) is designed to curved surface.
9. according to the LED lighting device (100) described in any one in claim 1 to 5, it is characterized in that, described exit facet (32) has the first exit facet (321) and the second exit facet (322) in the first exit facet (321) both sides, wherein said the first exit facet (321) with respect to described the second exit facet (322) more near described at least a line LED chip (2), thereby in described packaging body (3) formation recessed region.
10. LED lighting device according to claim 9 (100), is characterized in that, described recessed region has square cross section, and described the first exit facet (321) is formed on the bottom in the face of described at least a line LED chip (2) of described recessed region.
11. LED lighting devices according to claim 9 (100), is characterized in that, described the second exit facet (322) is designed to plane.
12. LED lighting devices according to claim 9 (100), is characterized in that, described the first exit facet (321) and described the second exit facet (322) are parallel to respectively described circuit board (1).
13. according to the LED lighting device (100) described in any one in claim 1 to 5, it is characterized in that, described packaging body (3) is made up of PU glue or silica gel or epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398216.9A CN103775850A (en) | 2012-10-18 | 2012-10-18 | LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398216.9A CN103775850A (en) | 2012-10-18 | 2012-10-18 | LED lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103775850A true CN103775850A (en) | 2014-05-07 |
Family
ID=50568417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210398216.9A Pending CN103775850A (en) | 2012-10-18 | 2012-10-18 | LED lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103775850A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111480033A (en) * | 2017-12-15 | 2020-07-31 | 昕诺飞控股有限公司 | Lighting device housing, luminaire and method of manufacture |
-
2012
- 2012-10-18 CN CN201210398216.9A patent/CN103775850A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111480033A (en) * | 2017-12-15 | 2020-07-31 | 昕诺飞控股有限公司 | Lighting device housing, luminaire and method of manufacture |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140507 |