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(11) | EP 3 832 203 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | LED BULB |
| (57) The present application provides a LED bulb, including a light-transmissive housing,
a lamp holder, a core column and a light source assembly, the lamp holder covers at
an opening of the light-transmissive housing; the core column is received in the light-transmissive
housing and covering the opening of the light-transmissive housing; and the light
source assembly is fixed to the core column; the light source assembly includes a
substrate, a LED chipset, two electrodes, a constant current driver module and a fluorescence
glue, the electrodes are electrically connected with the lamp holder, and the constant
current driver module is electrically connected with the LED chipset and the electrodes.
The present application adopts chipset and the constant current driver module are
combined and packaged on the same light source assembly, which does not need to provide
an additional drive assembly, the subsequent assembly processes is reduced, such that
only needs to use the light source assembly to replace the tungsten filament to make
a traditional incandescent lamp into a LED filament lamp during production. Thereby,
the technical problem that the production process of the LED filament lamp cannot
be compatible with the traditional incandescent lamp production process is effectively
solved, the cost of transformation the production equipment and production process
are saved, and the production efficiency of LED filament lamps is improved.
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Technical Field
[0001] The present application relates to the technical field of LED luminaire, and more particularly to a LED bulb.
Background
[0002] With the gradual improvement of people's awareness of energy saving and environmental protection, various countries have gradually included incandescent products with high energy consumption in the elimination list, and replaced them with LED filament lamp products with low energy consumption and wider application. At present, the LED filament lamps sold on the market are generally assembled with a light source components and a drive component, such a structural design requires more processes, and the entire production process cannot be compatible with the traditional incandescent production process. In addition, the production line needs to be transformed by the manufacturer investing a lot of manpower and material resources, which leads to the high production cost of LED filament lamps.
SUMMARY
[0003] An object of the present application is to provide a LED bulb, including but not limited to, solving the technical problem that the production process of the LED filament lamp cannot be compatible with the traditional incandescent lamp production process.
[0004] In order to achieve the object above mentioned, the present application provides a LED bulb, including: a light-transmissive housing; a lamp holder, covering at an opening of the light-transmissive housing; a core column, received in the light-transmissive housing and covering the opening of the light-transmissive housing; and a light source assembly, fixed to the core column;
the light source assembly includes:
a substrate;
a LED chipset, fixed to the substrate;
two electrodes, fixed at the substrate and electrically connected to the lamp holder;
a constant current driver module, fixed to the substrate and electrically connected to the LED chipset and the electrodes; and
a fluorescence glue, applied onto the substrate and encapsulating the LED chipset and the constant current driver module.
[0005] Optionally, the lamp holder is provided therein with a fuse or a fuse resistance, and the electrodes are electrically connected with the lamp holder through the fuse or the fuse resistance.
[0006] Optionally, the light source assembly further includes:
a rectifier module, fixed to the substrate, and the constant current driver module is electrically connected with the electrodes through the rectifier module.
[0009] Optionally, the highly thermally conductive gas is any one selected from the group consisting of helium, hydrogen, a helium-oxygen mixture gas, and a helium-hydrogen mixture gas.
[0010] Optionally, the core column comprises a base, a support rod and two electric lead-out wires; a bottom of the base covers the opening of the light-transmissive housing such that an interior of the light-transmissive housing is enclosed to form a closed space, the support rod is fixed to the base, an end of the two electric lead-out wires extends into the closed space to be connected with the electrodes of the light source assembly, and the other end of the two electric lead-out wires passes through the base to be connected with the lamp holder.
[0011] Optionally, the inside of the base is formed with an exhaust channel and the base defines therein with an exhaust hole in communication with the exhaust channel.
[0012] Optionally, the LED chipset comprises a plurality of front-mounted LED chips or flip-chip LED chips spaced apart, and the plurality of front-mounted LED chips or flip-chip LED chips are connected in series and / or in parallel.
[0013] Optionally, the light-transmissive housing is any one selected from the group consisting of a high borosilicate glass bulb, a soda-lime glass bulb, and a Schott glass bulb.
[0014] The beneficial effect of the LED bulb provided by the present application is that the LED chipset and the constant current driver module are combined and packaged on the same light source assembly, which does not need to provide an additional drive assembly, the subsequent assembly processes is reduced, such that only needs to use the light source assembly to replace the tungsten filament to make a traditional incandescent lamp into a LED filament lamp during production. Thereby, the technical problem that the production process of the LED filament lamp cannot be compatible with the traditional incandescent lamp production process is effectively solved, the cost of transformation the production equipment and production process are saved, and the production efficiency of LED filament lamps is improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to explain the embodiments of the present application more clearly, a brief introduction regarding the accompanying drawings that need to be used for describing the embodiments of the present application or the prior art is given below; it is obvious that the accompanying drawings described as follows are only some embodiments of the present application, for those skilled in the art, other drawings can also be obtained according to the current drawings on the premise of paying no creative labor.
Figure 1 is a structural schematic view of a LED bulb provided by the present application;
Figure 2 is a structural schematic view of a light source assembly in a LED bulb provided by the present application;
Figure 3 is a cross-sectional view of I-I in figure 2;
Figure 4 is an enlarged schematic view of part A of figure 3; and
Figure 5 is an enlarged schematic view of part B of figure 3.
[0016] In the drawings, the numerals referring to the technical features are listed as follows: 1-LED bulb; 10-light-transmissive housing; 20-lamp holder; 30-core column; 40-light source assembly; 31-base; 32-support rod; 33-electric lead-out wire; 41-substrate; 42-LED chipset; 43-electrode; 44-constant current driver module; 45-wire; 46-fluorescence glue; 47-rectifier module; 100-closed space; 200-fuse resistance; 311-exhaust channel; 312-exhaust hole; 420-front-mounted LED chip.
DETAILED DESCRIPTION
[0017] In order to make the purpose, the technical solution and the advantages of the present application be clearer and more understandable, the present application will be further described in detail below with reference to accompanying figures and embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate but not to limit the present application.
[0018] It is noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly or indirectly on another component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to another component. When a component is referred to as being "electrically connected" to another component, it can be a conductor electrical connection, or a wireless electrical connection, or any other connection that can transmit electrical signals. The orientations or positional relationships indicated by the terms "up", "down", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, and are for ease of description only, and do not indicate or imply the device referred Or the element must have a specific orientation, structure and operation in a specific orientation, so it cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0020] Please refer to FIG. 1 to FIG. 3. The LED bulb 1 includes a light-transmissive housing 10, a lamp holder 20, a core column 30, and a light source assembly 40; the lamp holder 20 covers at an opening of the light-transmissive housing 10, and the core column 30 covers the opening of the light-transmissive housing 10, and the light source assembly 40 is fixed to the core column 30. The light source assembly 40 includes a substrate 41, an LED chipset 42, and two electrodes 43, a constant current driver module 44, and fluorescent glue 46; the LED chipset 42 is fixed to the substrate 41, and the two electrodes 43 are fixed at the substrate 41, and preferably, the two electrodes 43 are respectively fixed at opposite ends of the substrate 41, and the two electrodes 43 are electrically connected to the lamp holder 20, the constant current driver module 44 is fixed to the substrate 41, the constant current driver module 44 is electrically connected to the LED chipset 42 and the electrodes 43, and the fluorescent glue 46 covers the substrate 41, and the fluorescent glue 46 wraps the LED chipset 42 and the constant current driver module 44. It can be understood that the light source assembly 40 further includes a wire 45, which can be provided independently or printed on the substrate 41 by using an electronic printing process, the LED chipset 42 and the electrode 43 are connected to the constant current driver module 44 through the wire 45, respectively; Here, the constant current driver module 44 is an LED constant current drive chip.
[0021] When in use, the lamp holder 20 is plugged into the lamp base, and external power or mains power is supplied to the constant current driver module 44 through the lamp holder 20 and the electrodes 43. After the constant current driver module 44 is powered on, the light emitted by the LED chipset 42 is uniformly scattered outward by the fluorescent glue 46.
[0022] The LED bulb 1 provided by the present application adopts the LED chipset 42 and the constant current driver module 44 to be packaged on the same light source assembly 40, which does not need to provide an additional drive assembly, the subsequent assembly processes is reduced, such that only needs to use the light source assembly 40 to replace the tungsten filament to make a traditional incandescent lamp into a LED filament lamp during production. Thereby, the technical problem that the production process of the LED filament lamp cannot be compatible with the traditional incandescent lamp production process is effectively solved, the cost of transformation the production equipment and production process are saved, and the production efficiency of LED filament lamps is improved.
[0023] Optionally, please refer to FIG. 1, as a specific embodiment of the LED bulb provided by the present application, a fuse or a fuse resistance 200 is provided in the lamp holder 20. Here, the electrodes 43 are electrically connected with the lamp holder 20 through the fuse or the fuse resistance 200, that is, the light source assembly 40 is overcurrent and overheat protected through a fuse or a fuse resistance 200 to ensure the safe use of the LED bulb 1.
[0024] Optionally, please refer to FIG. 4. As a specific embodiment of the LED bulb provided by the present application, the light source assembly 40 further includes a rectifier module 47, which is fixed to the substrate 41. Here, the constant current driver module 46 is electrically connected to the electrode 43 through the rectifier module 47. Specifically, the constant current driver module 46, the rectifier module 47 and the electrodes 43 are connected in sequence through the wire 45, after the electrodes 43 are connected to the external power source or the mains power, the current flows through the rectifier module 47, and then the current is converted from alternating current into direct current to be flowed into the constant current driver module 46, it is ensured that the constant current driver module 46 can operate normally. Of course, according to specific conditions and requirements, in other embodiments of the present application, the constant current driver module 46 and the rectifier module 47 may be separately installed on two light source assemblies. At that time, the LED bulb needs to be equipped with at least one light source assembly having the constant current driver module 46 and at least one light source assembly having the rectifier module 47, and the light source assembly having the rectifier module 47 is connected with an input terminal of the current of the LED bulb, and the light source assembly having the constant current driver module 46 is connected with the light source assembly having the rectifier module 47.
[0025] Optionally, please refer to FIG. 4. As a specific embodiment of the LED bulb provided by the present application, the rectifier module 47 is a bridge rectifier or a discrete diode.
[0026] Optionally, please refer to FIG. 1, as a specific embodiment of the LED bulb provided by the present application, the light-transmissive housing 10 is filled with a highly thermally conductive gas. Specifically, the highly thermally conductive gas is any one selected from the group consisting of helium, hydrogen, a helium-oxygen mixture gas, and a helium-hydrogen mixture gas. Of course, according to specific conditions and requirements, in other embodiments of the present application, the highly thermally conductive gas may also be another inert gas or mixture gas having a thermally conductive function, which is not limited herein. In this way, with the assistance of a highly thermally conductive gas, the heat dissipation efficiency of the LED bulb 1 is greatly improved.
[0027] Optionally, please refer to FIG. 1, as a specific embodiment of the LED bulb provided by the present application, the core column 30 includes a base 31, a support rod 32, and two electric lead-out wires 33, the bottom of the base 31 covers the opening of the light-transmissive housing 10 for enclosing the interior of the light-transmissive housing 10 to form a closed space 100. The support rod 32 is fixed to the base 31. One end of the two electric lead-out wires 33 extends into the closed space 100, the other end of the two electric lead-out wires 33 passes through the base 31 to be connected with the lamp holder 20. Specifically, the support rod 32 is fixed to the end surface of the base 31 away from the opening of the light-transmissive housing 10 and is used to support the light source assembly 40, the two electric lead-out wires 33 pass through the base 31 and are used to connect the light source assembly 40 and the lamp holder 20. The highly thermally conductive gas is filled in the closed space 100, and the heat generated by the light source assembly 40 can be quickly transmitted to the light-transmissive housing 10.
[0028] Optionally, please refer to FIG. 1, as a specific embodiment of the LED bulb provided by the present application, an exhaust channel 311 is formed inside the base 31, and an exhaust hole 312 is provided on the base 31. The exhaust hole 312 is in communication with the exhaust channel. Specifically, the exhaust channel 311 penetrates the base 31, and two exhaust holes 312 are formed on the base 31 at opposite ends of the exhaust channel 311, one of which is in communication with the outside air, and the other exhaust hole 312 is in communication with the closed space 100 inside the light-transmissive housing 10. When performing the evacuation process, the external evacuation equipment can exhaust the air in the closed space 100 through the exhaust channel 311 and the exhaust holes 312; when the highly thermally conductive gas is filling, the highly thermally conductive gas can be injected into the closed space 100 through the exhaust channel 311 and the exhaust holes 312; when the highly thermally conductive gas is filled, the exhaust hole 312 in communication with the external air only needs to be blocked to ensure the closed space 100 enclosed of the interior of the light-transmissive housing 10 from leaking of highly thermally conductive gas.
[0029] Optionally, please refer to FIG. 1, as a specific embodiment of the LED bulb provided by the present application, the LED chipset 42 includes a plurality of front-mounted LED chips 420 or a plurality of flip-chip LED chips, the plurality of front-mounted LED chips 420 or the plurality of flip-chip LED chips are spaced with each other, and the plurality of front-mounted LED chips 420 or the plurality of flip-chip LED chips are connected in series and / or in parallel. That is, the plurality of front-mounted LED chips 420 or the plurality of flip-chip LED chips are connected in series with each other through the wires 45, or are connected in parallel with each other, or are partially connected in series, and the other are connected in parallel.
[0030] Optionally, please refer to FIG. 1, as a specific embodiment of the LED bulb provided by the present application, the light-transmissive housing 10 is any one selected from the group consisting of a high borosilicate glass bulb, a soda lime glass bulb, and a Schott glass bulb. Of course, according to specific conditions and requirements, in other embodiments of the present application, the light-transmissive housing 10 may also be a bulb housing made of thermally conductive plastic, which is not limited herein.
[0031] The aforementioned embodiments are only preferred embodiments of the present application. For one of ordinary skill in the art, according to the thought of the present application, specific implementation modes and application scopes may be modified, and the content of the specification should not be interpreted as any limitation to the present application.
1. A LED bulb (1), comprising:
a light-transmissive housing (10);
a lamp holder (20), covering at an opening of the light-transmissive housing (10);
a core column (30), received in the light-transmissive housing (10) and closing the opening of the light-transmissive housing (10); and
a light source assembly (40), fixed to the core column (30);
wherein the light source assembly (40) comprises:
a substrate (41);
a LED chipset (42), fixed to the substrate (41);
two electrodes (43), fixed at the substrate (41) and configured to be electrically connected to the lamp holder (20);
a constant current driver module (44), fixed to the substrate (41) and configured to be electrically connected to the LED chipset (42) and the electrodes (43); and
a fluorescence glue (46), applied to the substrate (41) and encapsulating the LED chipset (42) and the constant current driver module (44).
2. The LED bulb of claim 1, wherein the lamp holder (20) is provided therein with a fuse
or a fuse resistance (200), and the electrodes (43) are electrically connected with
the lamp holder (20) through the fuse or the fuse resistance (200).
3. The LED bulb of claim 1, wherein the light source assembly (40) further comprises:
a rectifier module (47), fixed to the substrate (41), and the constant current driver module (44) is electrically connected with the electrodes (43) through the rectifier module (47).
a rectifier module (47), fixed to the substrate (41), and the constant current driver module (44) is electrically connected with the electrodes (43) through the rectifier module (47).
4. The LED bulb of claim 3, wherein the rectifier module (47) is a bridge rectifier or
a discrete diode.
5. The LED bulb of any one of claims 1 to 4, wherein the light-transmissive housing (10)
is filled with a highly thermally conductive gas.
6. The LED bulb of claim 5, wherein the highly thermally conductive gas is the one selected
from the group consisting of helium, hydrogen, a helium-oxygen mixture gas, and a
helium-hydrogen mixture gas.
7. The LED bulb of claim 5, wherein the core column (30) comprises a base (31), a support
rod (32) and two electric lead-out wires (33); a bottom of the base (31) covers the
opening of the light-transmissive housing (10) such that an interior of the light-transmissive
housing (10) is enclosed to form a closed space, the support rod (32) is fixed to
the base (31), an end of the two electric lead-out wires (33) extends into the closed
space to be connected with the electrodes (43) of the light source assembly (40),
and the other end of the two electric lead-out wires (33) passes through the base
(31) to be connected with the lamp holder (20).
8. The LED bulb of claim 7, wherein the inside of the base (31) is formed with an exhaust
channel (311) and the base (31) defines therein with an exhaust hole (312) in communication
with the exhaust channel (311).
9. The LED bulb of any one of claims 1 to 4, wherein the LED chipset (42) comprises a
plurality of front-mounted LED chips (420) or flip-chip LED chips which are spaced
apart, and the plurality of front-mounted LED chips (420) or flip-chip LED chips are
connected in series and / or in parallel.
10. The LED bulb of any one of claims 1 to 4, wherein the light-transmissive housing (10)
is the one selected from the group consisting of a high borosilicate glass bulb, a
soda-lime glass bulb, and a Schott glass bulb.