WO2015096280A1

WO2015096280A1 - Full light distribution type led bulb lamp with twisted-line-shaped lamp filament configuration

Info

Publication number: WO2015096280A1
Application number: PCT/CN2014/072981
Authority: WO
Inventors: 马文波; 王建全; 廖秋荣; 梁丽
Original assignee: 四川柏狮光电技术有限公司
Priority date: 2013-12-26
Filing date: 2014-03-06
Publication date: 2015-07-02
Also published as: CN103712105A

Abstract

A full light distribution type LED bulb lamp with twisted-line-shaped lamp filament configuration is composed of a sealed light-emitting bulb shell (1), a sealing part (11) which seals an opening on the bottom of the sealed light-emitting bulb shell, a light-emitting module (2) and a lamp cap (5) connected to the bottom of the sealing part. The light-emitting module (2) is composed of a core column (3) and k strip-shaped LED omni-directional lamp filaments (7), and the core column (3) is vertically mounted above the sealing part (11). The strip-shaped LED omni-directional lamp filaments (7) are arranged around the core column (3). The lamp further comprises a first supporting frame and a second supporting frame (10) located above and below the core column. The connecting points of the strip-shaped LED omni-directional lamp filaments (7) and the supporting frames are respectively located on a first projection circle (14) and a second projection circle (15) that have the same radius, have coinciding projections of circle centres in the vertical direction, and are located above and below the core column respectively. The lamp filament connecting points are evenly distributed on the respective projection circles at intervals. The included angles between two connecting points of each lamp filament and the connecting line of the circle centres of the respective projection circles are equal. The brightness of the head portion of the lamp is improved, and the brightness difference of the head portion of the lamp is effectively compensated.

Description

Fully light type LED bulb lamp with twisted filament arrangement

Technical field

The invention belongs to the field of illumination, and relates to an LED lamp, in particular to a full-light type LED bulb of a twisted filament arrangement.

Background technique

Based on energy conservation and environmental protection considerations, incandescent lamps are gradually being abandoned. LED bulbs are replacing the incandescent lamps one by one with long life, high luminous efficiency, no radiation and impact resistance.

However, since the LED light source itself has directivity, even if the emitted light is diffused through the diffusion cover, the light distribution angle of the existing LED candle lamp is very narrow compared to the conventional incandescent light source that can be distributed in all directions. , the light distribution angle is generally below 120 °, the light can not reach the back of the lamp, it will form a shadow.

At present, some LED bulbs are capable of large-angle light distribution, but use a large number of optical components such as reflectors and lenses to install a large diffusion bulb. However, the use of this method is to reduce the LED light efficiency, and the second is to make the LED bulb need to greatly reduce the heat dissipation space while maintaining the alternative form, so that the temperature of the LED is high during operation, and the LED power cannot be made large. At the same time, the existing large-angle LED bulbs need to use a diffusion cover for astigmatism, and the lighting effect is far from the traditional incandescent lamp.

In recent years, with the emergence of new materials and the advancement of semiconductor manufacturing processes, LED filaments capable of omnidirectional illumination have appeared, which can emit light in a range of 360 degrees, but for strip filaments, the light-emitting points are concentrated on the side of the filament, in the filament The head shines weakly. In front of the luminaire, a relatively weak shadow is formed. As shown in Fig. 1, the light distribution curve of the luminaire, where the brightness is zero, the orientation of the luminaire is positive. On the back, in front of the corresponding luminaire on the back, it can be found that the brightness is significantly smaller than other areas. Summary of the invention

In order to overcome the technical defects of the existing LED lamps with limited illumination angle and the presence of dark spots on the head, the present invention discloses a full-light type LED bulb of a twisted filament arrangement.

The fully-lighted LED bulb of the twisted filament arrangement of the present invention comprises a sealed light-emitting bulb, a sealing portion sealing the bottom opening of the sealed light-emitting bulb, a light-emitting module and a lamp cap connecting the bottom of the sealing portion. The light emitting module is composed of a core column and k strip LED omnidirectional filaments, the core column is vertically installed above the sealing portion; the strip LED omnidirectional filament is arranged around the core column, and further includes a core column Above and below the first support frame and the second support frame, the connection points of the strip LED omnidirectional filament and the support frame are respectively located at a first radius, the center of the circle is projected in the vertical direction, and respectively located above and below the core column Projection circle and second projection circle;

The filament connection points arranged in the clockwise direction on the first projection circle are respectively Al, A2~Ak, and the filament connection points on the second projection circle are respectively B1, B2~Bk, and the filament connection points Al, A2 Ak and Bl, B2~Bk are evenly spaced on the projection circle where they are located;

Defining a vector X, the X is the angle between the two connection points of the same filament and the line connecting the respective projection circles, and for each filament, the X is equal; the k is a positive integer not less than 3.

Specifically, the first support frame is a circular metal ring or a radial bracket or a regular polygonal frame, and the second support frame is a circular metal ring or a regular polygonal frame.

Specifically, the second support frame is a radial support, the radial support has a plurality of extending legs, and the middle portion of the radial support has a fixing ring, and the fixing ring is sleeved under the core column.

Preferably, the sealing portion is provided with an exhaust pipe, and the sealed luminous bulb is filled with a heat-dissipating protective gas, and the heat-dissipating protective gas is hydrogen or an inert gas or a mixture of the two. Further, the heat-dissipating protective gas is a mixed gas of hydrogen and helium, and the volume ratio of hydrogen is

5%.

Preferably, the strip-shaped LED omnidirectional filament has an angle of 30-50 degrees with the central axis of the stem.

Specifically, the k=8, X=45 degrees.

Further, the eight strip-shaped LED omnidirectional filaments are divided into two sets of parallel filament groups, and each filament group is formed by four strip-shaped LED omnidirectional filaments connected in series.

Preferably, a hollow sleeve connected between the sealing portion and the base is further included.

Specifically, the method further includes at least one of the following technical features: the blister model is any one of type A, G type, P type, B type, C type, and T type; the lamp type is E type and B type , any of GU type, GX type, GZ type.

The all-light-emitting LED bulb of the twisted filament arrangement of the invention adopts a plurality of omnidirectional filaments arranged in a twisted pattern to ensure the uniform brightness of the illumination around the lamp while improving the head of the lamp. The brightness effectively compensates for the difference in brightness of the head of the lamp and improves the uniformity of the brightness of the lamp.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a light distribution curve of an existing lamp;

2 is a schematic view of a specific embodiment of the present invention;

Figure 3 is a light distribution curve of the embodiment shown in Figure 2;

Figure 4 is a schematic diagram showing a geometric relationship of four filament arrays;

Figure 5 is a schematic diagram showing a geometric relationship of eight filament arrays;

The coordinates on the circumference in Figures 1 and 3 represent the spatial angle, and the coordinates on the circumference diameter represent the brightness in units of lumens; The reference numerals in the figure are: 1- Sealed luminescent bulb 2 - illuminating module 3-core column 4 - power lead 5 - lamp head 6 - driver 7 - strip LED omnidirectional filament 8 - connecting wire 9_ metal contact 10_ Second support frame 11 - Sealing portion 12 - Heat-dissipating protective gas 13 - Exhaust pipe 14 - First projection circle 15 - Second projection circle.

detailed description

The detailed description of the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

The fully-lighted LED bulb of the twisted filament arrangement of the present invention comprises a sealed light-emitting bulb 1, a sealing portion 11 that closes the bottom opening of the sealed light-emitting bulb, a light-emitting module 2, and a bottom portion of the connection sealing portion. The light-emitting module 2 is composed of a core post 3 and k strip-shaped LED omnidirectional filaments 7 , the core pillars being vertically installed above the sealing portion; the strip-shaped LED omnidirectional filaments are arranged around the core pillars, The first support frame and the second support frame are arranged above and below the core column, and the connection points of the strip-shaped LED omnidirectional filament and the support frame are respectively located at a same radius, and the center of the circle is projected in the vertical direction, respectively, and is respectively located above the stem. And the first projection circle 14 and the second projection circle 15 below; defining the filament connection points arranged in the clockwise direction on the first projection circle 14 as Al, A2~Ak, and the filament on the second projection circle 15 The connection points are respectively B1, B2~Bk, and the filament connection points are evenly distributed on the respective projection circles; the vector X is defined, and the X is the same connection point of the same filament and the respective projection circle center Angle line, each filament is equal to the X; k is a positive integer not less than 3.

In order to better explain the connection manner of the above filaments, FIG. 4 and FIG. 5 are taken as an example. FIG. 4 is an embodiment of using four strip-shaped LED omnidirectional filaments, and FIG. 4 is a geometric connection diagram, first projection. The four filament connection points on the circle 14 are Al, A2, A3, A4, respectively, and the four filament connection points on the second projection circle 15 are respectively B1, B2, B3, B4, wherein Al, A2, A3, A4 are Uniformly distributed on the first projection circle, Bl, B2, B3, B4 are evenly distributed on the second projection circle, between adjacent points The arc is a quarter of a circle. The ends of the four LED filaments are respectively A1B2, A2B3, A3B4, A4B1. For the filament A1B2, the end point A1 is connected to the first projection circle 14 center AO as A1A0, and the end point B2 is connected to the second projection circle 15 center B0. B2B0, in the embodiment of FIG. 4, the angle X between A1A0 and B2B0 is 90 degrees, the vector direction of X is rotated clockwise from A1A0, and the other three filaments A2B3, A3B4, A4B1 are similar to A1B2, and the vector X is from the first The filament connection point on the projection circle is rotated 90 degrees clockwise around the center to obtain a connection point on the second projection circle.

FIG. 5 is an embodiment of an eight-bar LED omnidirectional filament. The eight filament connection points on the first projection circle 14 are respectively A1-A8, and the eight filament connection points on the second projection circle are respectively B1- B8, wherein A1-A8 are evenly distributed on the first projection circle, B1-B8 are evenly distributed on the second projection circle, the arc between adjacent two points is one-eighth circumference, and the two end points of the eight filaments A1B2, A2B3, A3B4, A4B5, A5B6, A6B7, A7B8, A8B1, for the eight filaments in Figure 5, the vector X is rotated 45 degrees clockwise from the filament connection point on the first projection circle, thereby The connection point on the second projection circle is obtained.

For a filament of a given length, by adjusting the radius of the first projection circle and the second projection circle, that is, adjusting the angle between the filament and the axis of the stem, the longitudinal projection size of the illumination module is adjusted, and the center axis of the filament and the stem is clamped. When the angle is increased, high brightness and uniformity of illumination can be obtained on the front side of the luminaire, but the increase of the angle is not conducive to assembly. In practical applications, the opening size of the blister limits the projected cross-sectional area of the illuminating module. In the process, the filament and the core column need to be assembled into a complete light-emitting module before being placed inside the bulb, so the maximum projected area of the light-emitting module should be smaller than the size of the opening of the bulb. At the same time, the design of the invention aims to obtain higher brightness at the geometric center of each filament, and to illuminate the complementary angle of the filaments at all angles to minimize the shadow of the stem and the central dark spot, so the tilt angle of the filament should be considered smoothly. Under the premise of assembly, obtain the largest possible brightness distribution in the vertical direction. After comprehensive consideration, the angle between the strip LED omnidirectional filament and the central axis of the stem is preferably set to 30-50 degrees. For the specific embodiment in Fig. 5, the angle between the eight filaments and the central axis of the stem is 35 degrees, and the A60 type bulb is used, and the light distribution curve obtained is shown in Fig. 3. In Fig. 3, the lamp is obtained in the forward direction. The brightness of 72 lumens is significantly improved compared to Fig. 1, and the filaments symmetrically arranged around the stem also ensure uniform high brightness in the lateral direction of the lamp.

The first support circle is located above the core column, and the first support frame can be realized by a circular metal ring or a radial bracket or other regular polygonal frame, as long as the respective filament connection points can be located on the same circle, and the second support frame 10 is located Below the stem, it may be a circular metal ring or a regular polygonal frame, or may be a radial bracket having a plurality of extending legs, the radial bracket having a fixing ring in the middle, the fixing ring sleeve Below the stem 3 .

The electrodes of the respective filaments and the contacts of the power supply lead 4 are connected by a connecting wire 8. A metal contact 9 may be disposed above the stem, and is fixedly connected with the upper portion of the filament by a connecting wire, and a person skilled in the art uses a known connecting structure. For example, with a star or radial connection, it is possible to create a current loop between the two power lead contacts for each filament. The brightness of the LED is proportional to the current flowing through the LED. In order to achieve a uniform brightness, a series connection can be used. However, the risk caused by the series connection is that all LEDs do not emit light when any LED is disconnected. For four or four Strip LED omnidirectional filaments above the root can be connected in series and parallel by connecting wires. For example, for four filaments, two or two wires can be connected in series and then in parallel. The two filaments connected in series in the same branch form a symmetric distribution in spatial distribution, and weakening the visual effects of uneven brightness caused by different parallel currents of two parallel branches For eight filaments, it can be divided into two sets of filament groups connected in parallel, and each filament group is formed by four strip-shaped LED omnidirectional filaments connected in series.

In order to improve the heat dissipation performance of the LED, a heat-dissipating protective gas can be filled in the sealed light-emitting bulb. The exhaust pipe 13 is correspondingly arranged in the seal portion. When installing, the light-emitting module and the sealing portion are integrally mounted into the sealed light-emitting bulb, and the heat-dissipating protective gas 12 is filled inwardly by the exhaust pipe, and the inner air is extruded at the same time to make the bulb The inside is filled with a certain amount of heat-dissipating protective gas. The heat-dissipating protective gas can be an inert gas with low viscosity and high thermal conductivity. Since hydrogen has excellent thermal conductivity, hydrogen can also be selected as the heat-conducting gas, but since hydrogen is an explosive gas, The safety cost is greatly increased during production and use. Therefore, it is possible to use a mixture of hydrogen and an inert gas. The preferred inert gas is helium. The molecular weight of helium is the closest to that of hydrogen. When mixed, the mass density is similar and the mixing is more uniform. To achieve the best thermal conductivity, the experiment proves that when the proportion of hydrogen is 5%, a better heat dissipation curve can be obtained, and the proportion of hydrogen gas continues to increase. The heat dissipation effect is not obvious, but the danger is increased, hydrogen, helium or The other inert gas purity can be selected as an ordinary 99.999%.

The pressure drop of the heat-dissipating protective gas is generally close to atmospheric pressure. To prevent external air from permeating and oxidizing, it may be set at a pressure slightly higher than atmospheric pressure of 1. 1-1. 5 MPa. The sealed light-emitting bulb type may be any one of A type, G type, P type, B type, C type, T type; the lamp head type is E type, B type, GU type, GX type, GZ type Any of them.

The lamp cap 5 is used for connecting a mains or other power source, and the driver 6 for driving the LED filament can be fixed inside the lamp cap by potting glue, or a hollow sleeve can be added between the sealing portion 11 and the lamp cap 5 to place the driver 6 In the hollow casing, this method is suitable for accommodating a drive having a large volume or a large amount of heat, and the hollow sleeve may be a plastic or metal casing.

The foregoing description of the preferred embodiments of the present invention, the preferred embodiments of the various preferred embodiments may be arbitrarily superimposed and used, if not presumably contradictory or based on a preferred embodiment. The specific parameters in the embodiments and the examples are only for the purpose of clearly indicating the inventor's invention verification process, and are not intended to limit the scope of patent protection of the present invention. The scope of the invention is to be determined by the scope of the invention, and equivalent structural changes made by the description of the invention and the drawings are intended to be included within the scope of the invention.

Claims

& He J wants

1. A fully light-distributed LED bulb with a twisted filament arrangement, characterized in that it consists of a sealed luminous bulb shell (1), a sealing portion (11) that seals the bottom opening of the luminous bulb shell, and a luminous module. (2) and a lamp cap connected to the bottom of the sealing part. The light-emitting module (2) is composed of a core column (3) and k strips of LED omnidirectional filaments (7). The core column is installed vertically in the sealing part. above; the strip LED omnidirectional filament is arranged around the core column, and also includes a first support frame and a second support frame located above and below the core column. The connection points of the strip LED omnidirectional filament and the support frame are respectively located at a radius The same, the center projections in the vertical direction coincide with each other and are located on the first projection circle (14) and the second projection circle (15) above and below the core column respectively;

It is defined that the filament connection points arranged in order in the clockwise direction on the first projection circle (14) are A1, A2~Ak, and the filament connection points on the second projection circle (15) are B1, B2~Bk respectively. Each filament connection point A1, A2~Ak and Bl, B2~Bk are evenly spaced on the projection circle where they are located;

Define a vector

The k is a positive integer not less than 3.

2. A fully light-distributed LED bulb with a twisted filament arrangement as claimed in claim 1, wherein the first support frame is a circular metal ring or a radial bracket or a regular polygonal frame , the second support frame is a circular metal ring or a regular polygonal frame.

3. A fully light-distributed LED bulb with a twisted filament arrangement as claimed in claim 1, characterized in that the second support frame (10) is a radial support, and the radial support It has a plurality of extended legs, and the radial bracket has a fixing ring in the middle, and the fixing ring is sleeved below the core column (3).

4. A fully light-distributed LED bulb with twisted filament arrangement according to claim 1, characterized in that an exhaust pipe (13) is provided in the sealing part, and the sealed luminous bulb shell The interior is filled with a heat dissipation protective gas (12), and the heat dissipation protective gas (12) is hydrogen or an inert gas or a mixture of both.

5. A fully light-distributed LED bulb with twisted filament arrangement as claimed in claim 4, characterized in that the heat dissipation protection gas is a mixed gas of hydrogen and helium, and the volume ratio of hydrogen is 5 %.

6. A fully light-distributed LED bulb with a twisted filament arrangement as claimed in claim 1, It is characterized in that the angle between the strip-shaped LED omnidirectional filament and the central axis of the core column is 30-50 degrees.

7. A fully light-distributed LED bulb with a twisted filament arrangement as claimed in claim 1, characterized in that, k=8, X=45 degrees.

8. A fully light-distributed LED bulb with a twisted filament arrangement as claimed in claim 7, characterized in that the eight strip-shaped LED omnidirectional filaments are divided into two parallel filament groups, and each filament The group is formed by four strip-shaped LED omnidirectional filaments connected in series.

9. A fully light-distributed LED bulb with twisted filament arrangement according to claim 1, characterized in that it further includes a hollow connected between the sealing part (11) and the lamp cap (5). set.

10. A fully light-distributed LED bulb with a twisted filament arrangement as claimed in claim 1, further comprising at least one of the following technical features:

The bulb model is any one of type A, G, P, B, C, and T; the lamp head model is any one of E, B, GU, GX, and GZ. kind.