WO2013107223A1

WO2013107223A1 - Led full optical angle lamp bulb

Info

Publication number: WO2013107223A1
Application number: PCT/CN2012/085532
Authority: WO
Inventors: 赵铱楠; 江新华
Original assignee: 深圳和而泰照明科技有限公司
Priority date: 2012-01-18
Filing date: 2012-11-29
Publication date: 2013-07-25
Also published as: CN102563428B; CN102563428A

Abstract

An LED full optical angle lamp bulb, including a lamp housing (1) and a light source (2) and a reflection unit (3) provided in the lamp housing. The light source (2) at least includes a first group of light sources (21), a second group of light sources (22) and a third group of light sources (23). The reflection unit (3) at least includes a first reflector (31) and a second reflector (32). The lamp housing (1) is spaced into a first zone, a second zone and a third zone by the first reflector (31) and the second reflector (32). The first group of light sources (21), the second group of light sources (22) and the third group of light sources (23) are respectively provided in the first zone, the second zone and the third zone. The heat produced by the light sources in the LED full optical angle lamp bulb is distributed evenly, which prolongs the service life; the design space of the power supply is larger, thus the power of the lamp bulb can be increased as required; and the outline shape thereof can be made the same as that of the classical incandescent lamp as required, thus meeting traditional aesthetic standards.

Description

LED full-angle light bulbs

The invention relates to the technical field of lighting fixtures, in particular to an LED full-angle light bulb. Background technique

With the rapid development of LED technology, the standards for LED lighting products have gradually been established. In particular, the Energy Star (ES) standard promoted by the US Department of Energy and the US Environmental Protection Agency has gradually become the entry point for LED lighting products in the US market. Among them, ES for Class A bulbs (ie, bulbs in the shape of standard incandescent lamps), in addition to the basic optoelectronic performance requirements such as luminous flux output and light efficiency, also has the following requirements for luminescence characteristics: The change in light intensity within γ 0-135 ° cannot exceed The average light intensity in this range is 20%, and the luminous flux in γ 135-180° cannot be less than 5% of the total luminous flux. There are only a handful of LED Class A bulbs currently on the market that can pass the ES standard. The main reason is that the above all-optical angles cannot be met.

Some of the bulbs in the prior art emit light from both sides with a blue LED as a light source, and a peripheral has a bulb mixed with a phosphor. The bulb utilizes the diffusion characteristics of the bulb to achieve uniform light distribution at all angles. However, the disadvantages of this solution are: The cost of the phosphor is high, and its yellow color makes the appearance of the bulb not widely accepted, and the side-illuminating panel is troublesome in production.

Some of the prior art light bulbs use a single integrated or high-power LED as a light source, with a specially designed lens, and full-angle light distribution by means of total reflection of the lens or a reflective film. The disadvantage of this solution is that it requires a bulb with a large solid angle range, so that the bulb does not have enough power supply design space, and the LED heat is concentrated, making it difficult to make a higher power product. Summary of the invention

The present invention provides an LE D full-angle light bulb designed to evenly distribute the heat generated by the light source and increase the design space of the power supply, and to manufacture a high-power light bulb as needed.

Embodiments of the present invention provide an LED full-angle light bulb, including a lamp housing and a light source and a reflection unit disposed in the lamp housing, the light source including at least a first group of light sources, and a second group a light source and a third group of light sources, the reflection unit at least comprising a first reflector and a second reflector, the lamp housing being separated into a first zone, a second zone and a first by the first reflector and the second reflector In the three zones, the first group of light sources, the second group of light sources, and the third group of light sources are respectively disposed in the first zone, the second zone, and the third zone.

Preferably, the lamp housing comprises a bulb and a heat sink, and the bulb and the heat sink are connected to form a closed chamber, the bulb comprising an inner bulb and an outer bulb.

Preferably, the material of the inner layer bulb and the outer layer bulb is the same, or the material haze of the outer layer bulb is larger than the material haze of the inner layer bulb.

Preferably, the light source is a plurality of LED illuminants, and the plurality of LED illuminants of the first group of light sources, the second group of light sources and the third group of light sources are respectively arranged in a circular shape.

Preferably, the first group of light sources comprises N1 LED illuminants, the second group of light sources comprises N2 LED illuminators, and the third group of light sources comprises N3 LED illuminators, N1: N2: N3 at 7: 3: 2 and 5: 3: 2 between.

Preferably, the first set of light sources are reflected by the concave surface of the first reflector, and the second set of light sources and the third set of light sources are reflected by the concave surface of the second reflector.

Preferably, the second group of light sources and the third group of light sources are disposed on the same horizontal plane. Preferably, the maximum vertical distance between the second group of light sources or the third group of light sources and the outer layer bulb is HI, and the maximum vertical distance between the first group of light sources and the outer layer bulb is H2, HI: H2 is between 1: 2 and 5: 6.

Preferably, the outer blister has a radius R, the first group of light sources form a circular radius R1, and the second group of light sources form a circular radius R2, and the third group of light sources are formed. The radius of the circle is R3, R: R1: R2: R3 is between 5: 3: 2: 1 and 12: 8: 5: 2.

Preferably, the first zone is a first enclosed zone, and the second zone and the third zone comprise a second enclosed zone.

Preferably, a plurality of LED illuminants in the first group of light sources form a series circuit, and a plurality of LED illuminants in the second group of light sources form a series circuit, and a plurality of LED illuminants in the third group of light sources form a series circuit, the first group The light source, the second set of light sources, and the third set of light sources form a parallel circuit.

Preferably, a mounting plate is disposed between the light source and the heat sink. The LED full-angle light bulb disclosed by the invention distributes the light emitted by the light source by the reflecting unit to achieve a 360-degree illumination surface without the illumination blind zone, and the light source is divided into the first group light source, the second group light source and the third group light source. The heat generated by the light source is uniformly distributed to extend the life of the bulb in the present invention; the light source can be reasonably arranged, the space inside the bulb can be fully utilized, the design space of the power source can be increased, and then the power of the bulb can be made. Large, and the outline of the LED full-angle light bulb of the present invention can be made the same as that of the classic incandescent lamp to conform to the consumer's traditional aesthetics. DRAWINGS

Figure 1 is a cross-sectional view of the LED full-angle light bulb of the present invention;

2 is a schematic view showing a test result of a light distribution curve of an LED full-angle light bulb according to a first embodiment of the present invention;

3 is a schematic view showing the test result of the light distribution curve of the LED full-angle light bulb in the second embodiment of the present invention. The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments. detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the present invention provides an LED full-angle light bulb. Referring to FIG. 1, the LED full-angle light bulb comprises a lamp housing 1, a light source 2 and a reflection unit 3, and the light source 2 and the reflection unit 3 are disposed inside the lamp housing 1.

The lamp housing 1 includes a bulb 11 and a heat sink 12, and the bulb 11 and the heat sink 12 are connected to form a closed chamber in which the light source 2 and the reflecting unit 3 are disposed. The bulb 11 includes an inner bulb 111 and an outer bulb 112. The advantage of providing the two shells 11 is that the light passes through the inner bulb 111 and is refracted by the outer bulb 112 to achieve secondary light distribution. .

In a specific embodiment, the inner layer bulb 111 and the outer layer bulb 112 are of the same material and have the same ability to diffuse haze. Of course, in other specific embodiments, in order to adjust the ideal For the light distribution, the inner blister 111 and the outer blister 112 may be made of different haze diffusion materials, for example, the outer blister 112 is made of a high haze material, and the inner blister 111 is made of a low haze material.

In a specific embodiment, a mounting plate 4 is disposed between the heat sink 12 and the light source 2, and the heat sink 12 and the light source 2 are respectively disposed on the upper end surface and the lower end surface of the mounting board 4, that is, the heat generating device and the heat sink member are disposed together. The heat dissipation speed is accelerated, the heat dissipation effect is enhanced, and the service life of the LED full-angle light bulb of the invention is prolonged. Of course, in other embodiments, the circuit can be screen printed directly on the heat sink 12, and the light source 2 is disposed directly on the heat sink 12.

The light source 2 is a plurality of LED illuminators, and is divided into at least three groups of light sources, wherein the three groups of light sources are a first group of light sources 21, a second group of light sources 22, and a third group of light sources 23, and the light source 2 is divided into a first group of light sources 21, The purpose of the second group of light sources 22 and the third group of light sources 23 is to make full use of the space in the bulb 1; leaving the space saved by the source 2 to the power source, making it possible to make a high-power bulb; The angle light bulb, the LED full-angle light bulb shape of the invention can be the same as the classic incandescent lamp, conforms to the traditional aesthetics; the light source 2 is dispersed to make the heat distribution uniform, and the service life of the LED full-angle light bulb of the invention is prolonged, and Can be made into a high power bulb.

In a specific embodiment, the LED illuminants selected for the first set of light sources 21, the second set of light sources 22, and the third set of light sources 23 may be the same or different, and LED illuminants of different electrical or optical characteristics may be selected as desired.

In a specific embodiment, the first set of light sources 21 includes N1 LED illuminators, the second set of light sources 22 includes N2 LED illuminators, and the third set of light sources 23 includes N3 LED illuminators, N1: N2: N3 at 7: 3: 2 and 5: 3: 2 between. The material selection of the inner layer bulb 111 and the outer layer bulb 112 is different or the number ratio of the LED illuminants in the first group light source 21, the second group light source 22, and the third group light source 23 is different, and the LED full-angle bulb of the present invention is matched. The light curve is also different. For details, refer to FIG. 2 and FIG. 3.

As shown in FIG. 2, the materials selected for the inner layer bulb 111 and the outer layer bulb 112 are the same, and the N1:N2:N3 is 7:3:2, the LED full-angle angle lamp of the invention; ;;

As shown in FIG. 3, the outer blister 112 is made of a high haze material, the inner blister 111 is made of a low haze material, and the N1:N2:N3 is 5:3:2. Schematic diagram of the test results of the light curve. In other embodiments, a plurality of LED illuminants in the first set of light sources 21 are arranged in a circle, a plurality of LED illuminants in the second set of light sources 22 are arranged in a circle, and a plurality of LED illuminants in the third set of light sources 23 The advantages of being arranged in a circular shape and being arranged in a circular shape are as follows: in the case of a 360-degree illuminated surface without irradiation blind spots, the production of the single-emitting light sheet is relatively low in cost compared with the prior art side-emitting light-emitting panel, and the heat distribution is further distributed. , making it possible to make high-power bulbs. Of course, depending on the need, the LED light emitters of the first group of light sources 21, the second group of light sources 22 and/or the third group of light sources 23 can be arranged in any shape that is closed, such as a square or elliptical shape.

In a specific embodiment, a plurality of LED illuminants in the first group of light sources 21 constitute a series circuit, and a plurality of LED illuminants in the second group of light sources 22 constitute a series circuit, and a plurality of LED illuminants in the third group of light sources 23 form a series circuit The first set of light sources 21, the second set of light sources 22, and the third set of light sources 23 form a parallel circuit. Since the circuit connection of the light source 2 is mixed, low-voltage start-up can be achieved, and the safety factor is high, and the operation of the entire lamp is not affected by the damage of the individual LED illuminators. Of course, in a specific embodiment, the connection relationship of the LED illuminants in the first group of light sources 21, the second group of light sources 22 or the third group of light sources 23 is not limited to the series connection, the first group of light sources 21, the second group of light sources 22 and the The three sets of light sources 23 are also not limited to forming a parallel circuit. The connection relationship of the LED illuminants in the first group of light sources 21, the second group of light sources 22 or the third group of light sources 23, and the circuit connection of the first group of light sources 21, the second group of light sources 22 and the third group of light sources 23 may be based on actual power sources The design of the circuit and the different wiring arrangements are designed in other forms.

In other embodiments, the second group of light sources 22 and the third group of light sources 23 are disposed on the same horizontal plane, the first group of light sources 21 are disposed on another horizontal plane, and the purpose of setting the light source 2 to a two-layer structure is: The refraction of the outer bulb 112 is utilized; 2. as shown in Fig. 2 or Fig. 3, there is a light distribution in the range of γ 0-180°; 3. as shown in Fig. 2 or Fig. 3, γ 0-135. The light distribution in the range is uniform, and the light intensity changes within 20% of the average light intensity; 4. As shown in Fig. 2 or Fig. 3, the luminous flux in the range of γ 135-180° accounts for more than 5% of the total luminous flux.

In a specific embodiment, the maximum vertical distance between the second set of light sources 22 or the third set of light sources 23 and the outer blister 112 is HI, and the maximum vertical distance between the first set of light sources 21 and the outer blister 112 is H2, HI: H2 is between 1: 2 and 5: 6. When the radius of the outer bulb 112 is 30 mm, the maximum of the second group of light sources 22 or the third group of light sources 23 and the outer layer of bulbs 112 The vertical distance is 30 mm, and the maximum vertical distance between the first set of light sources 21 and the outer blister 112 is 45 mm.

In a specific embodiment, the outer blister 112 has a radius R, the first set of light sources 21 form a circular radius R1, the second set of light sources 22 form a circular radius R2, and the third set of light sources 23 form a circle. The radius of the shape is R3, R: R1: R2: R3 is between 5: 3: 2: 1 and 12: 8: 5: 2. When the radius of the outer bulb 112 is 30 mm, the first group of light sources 21 has a circular radius of 20 mm, the second group of light sources 22 has a circular radius of 12 mm, and the third group of light sources 23 has a circular radius of 5.5. Mm.

The reflecting unit 3 includes at least a first reflector 31 and a second reflector 32. The second reflector 32 includes a first concave surface 321 and a second concave surface 322, and the first reflector 31 and the second reflector 32 have the inside of the lamp housing 1. Divided into three regions, respectively a first zone, a second zone and a third zone, the first group of light sources 21 are disposed in the first zone, the second group of light sources 22 are disposed in the second zone, and the third group of light sources 23 are provided In the third district. The first reflector 31 and the second reflector 32 distribute the light emitted by the first group of light sources 21, the second group of light sources 22, and the third group of light sources 23 by 360 degrees.

In other embodiments, the first zone is closed as the first enclosed zone, and most of the light of the first set of light sources 21 is reflected by the concave surface of the first reflector 31 to a range of γ 90-180°; The three zones constitute a second closed zone, and most of the light of the second set of light sources 22 is reflected by the first concave face 321 of the second reflector 32 to gamma 90. Direction; most of the light of the third group of light sources 23 is in the direction of γ 0°, and some of the light is reflected by the second concave surface 322 of the second reflector 32 to about γ 45 . The direction compensates for the shadow on the bulb 11 caused by the second reflector 32 blocking light. The light distribution in the range of γ 0-180° is achieved by the cooperation of the first group of light sources 21, the second group of light sources 22 and the third group of light sources 23 and the first reflector 31 and the second reflector 32. The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

Claim

What is claimed is: 1. An LED full-angle light bulb comprising a lamp housing and a light source and a reflection unit disposed in the lamp housing, wherein the light source comprises at least a first group of light sources, a second group of light sources, and a third group of light sources The reflecting unit includes at least a first reflector and a second reflector, and the lamp housing is divided into a first zone, a second zone, and a third zone by the first reflector and the second reflector, A set of light sources, a second set of light sources, and a third set of light sources are respectively disposed in the first zone, the second zone, and the third zone.

2. The LED full-angle light bulb according to claim 1, wherein the lamp housing comprises a bulb and a heat sink, and the bulb and the heat sink are connected to form a closed chamber, and the bulb comprises Inner and outer blister.

The LED full-angle light bulb according to claim 2, wherein the inner layer bulb and the outer layer bulb are made of the same material, or the outer layer bulb has a material haze ratio as described above. The material of the inner layer bulb has a large haze.

The LED full-angle light bulb according to any one of claims 1 to 3, wherein the light source is a plurality of LED illuminators, the first group of light sources, the second group of light sources, and the third group of light sources Several of the LED illuminators are respectively arranged in a circular shape.

The LED full-angle light bulb according to claim 4, wherein the first group of light sources comprises N1 LED illuminants, and the second group of light sources comprises N2 LED illuminators, the third group The light source comprises N3 LED illuminators, N1: N2: N3 between 7:3:2 and 5:3:2.

6. The LED full-angle light bulb of claim 5, wherein the first set of light sources are reflected by a concave surface of the first reflector, and the second set of light sources and the third set of light sources are The concave surface of the second reflector is reflected.

7. The LED full-angle light bulb according to claim 6, wherein: The two sets of light sources and the third set of light sources are disposed on the same horizontal plane.

The LED full-angle light bulb according to claim 7, wherein a maximum vertical distance between the second group of light sources or the third group of light sources and the outer layer bulb is HI, the first group of light sources The maximum vertical distance from the outer blister is H2, and HI: H2 is between 1:2 and 5:6.

The LED full-angle light bulb according to claim 8, wherein the outer bulb has a radius R, the first group of light sources has a circular radius R1, and the second group of light sources The circular radius formed is R2, and the circular radius formed by the third group of light sources is R3, and R: R1: R2: R3 is between 5:3:2:1 and 12:8:5:2.

10. The LED full-angle light bulb of claim 9, wherein the first zone is a first enclosed zone and the second zone and the third zone comprise a second enclosed zone.