High power LED filament bulb

Abstract

Provides high power LED filament bulbs with better heat dissipation. [Solution] The bulb includes a bulb housing 1, a filament 2, a base 3, and a driving component 4, the bulb housing 1 is connected to the base 3, the driving component 4 is attached to a cavity of the base 3 and includes an aluminum substrate 41, at least a portion of the edge of the aluminum substrate 4 contacts the inner wall of the base 3, the filament 2 is attached to the cavity of the bulb housing 1 and is electrically connected to the driving component 4, and a heat dissipation gel 5 covering the driving component 4 is provided within the base 3, the heat dissipation gel 5 contacts the inner wall of the base 3.

Description

[Technical field]

[0001] The present invention relates to the field of lighting fixture technology, and in particular to high power LED filament bulbs. [Background technology]

[0002] A light bulb is a device that converts electrical energy into light energy, and is mainly composed of a filament, a bulb housing, a driving component, a base, etc. When a light bulb is in operation, both the filament and the driving component generate heat, so the heat dissipation effect is an important factor in producing a qualified high-power LED filament bulb. Conventional LED filament bulbs do not have a very good heat dissipation structure, and the heat is naturally dissipated by the filament and the driving component, so the heat dissipation effect is poor. Summary of the Invention [Problem to be solved by the invention]

[0003] To address the above problems, the present invention provides a high-power LED filament bulb with better heat dissipation effect. [Means for solving the problem]

[0004] The technical means adopted in the present invention to solve the above problems is a light bulb including a bulb housing, a filament, a base, and a driving component, the bulb housing is connected to the base, the driving component is mounted in a cavity of the base, the driving component includes an aluminum substrate, at least a part of the edge of the aluminum substrate contacts the inner wall of the base, the filament is mounted in the cavity of the bulb housing and electrically connected to the driving component, and a heat dissipation gel is provided in the base to cover the driving component, and the heat dissipation gel contacts the inner wall of the base.

[0005] In the light bulb of the present invention, the base is filled with heat dissipation gel, the heat dissipation gel covers the driving component and contacts the inner wall of the base, and the aluminum substrate contacts the inner wall of the base to increase the contact area, which is favorable for heat dissipation, and the heat of the driving component is conducted to the base through the heat dissipation gel and then released. The above structure has the advantage that the driving component can dissipate heat more quickly than the prior art.

[0006] Preferably, the outer periphery of the aluminum substrate is composed of four straight line segments, two of which face each other and are parallel to each other, and four arc segments, two of which face each other and are distributed on the same circumference, with the outer walls of the arc segments contacting the inner wall of the base and leaving gaps between the outer walls of the straight line segments and the inner wall of the base. In this way, the arc segments are more closely attached to the base, the connection between the aluminum substrate and the base is more stable, and when the heat dissipation gel is filled, the heat dissipation gel flows into the inner end of the base through the gaps between the straight line segments and the inner wall of the base.

[0007] Preferably, the filament includes a first filament group and a second filament group, one end of the first filament group is connected to a drive component, and the second filament group is connected to one end of the first filament group away from the drive component. In this way, the first filament group and the second filament group form a segmented filament, which can save costs, and when comparing one long filament and two short filaments with the same total length, the total price of the two short filaments is lower than the price of one long filament. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of the structure of a high-power LED filament bulb according to the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0010] As shown in Figures 1 and 2, the high power LED filament bulb includes a bulb housing 1, a filament 2, a base 3, and a driving component 4. The bulb housing 1 is connected to the base 3, the driving component 4 is attached to the cavity of the base 3 and includes an aluminum substrate 41, at least a part of the edge of the aluminum substrate 41 contacts the inner wall of the base 3, the filament 2 is attached to the cavity of the bulb housing 1 and electrically connected to the driving component 4, and a heat dissipation gel 5 is provided in the base 3 to cover the driving component 4, and the heat dissipation gel 5 contacts the inner wall of the base 3.

[0011] The light bulb of the present invention can quickly dissipate heat from the driving component 4 by using the heat dissipation gel 5. The light bulb of the present invention fills the base 3 with heat dissipation gel 5, which is a thermally conductive silicone rubber, and the heat dissipation gel 5 covers the driving component 4 and contacts the inner wall of the base 3, and the heat of the driving component 4 is conducted to the base 3 through the heat dissipation gel 5 and then dissipated. The heat dissipation gel 5 serves to fix the driving component 4 when filled into the cavity of the base 3, so there is no need to provide a separate fixing structure. The area of ​​the aluminum substrate 41 is increased, and the edge of the aluminum substrate 41 contacts the inner wall of the base 3, increasing the contact area and favoring heat dissipation.

[0012] The outer contour of the aluminum substrate 41 is composed of four straight line segments 411, two of which face each other and are parallel to each other, and four arc segments 412, two of which face each other and are distributed on the same circumference, and the outer walls of the arc segments 412 contact the inner wall of the base 3, leaving gaps between the outer walls of the straight line segments 411 and the inner wall of the base 3. The arc segments 412 fit tightly against the inner wall of the base 3, and when the heat dissipating gel is filled, the heat dissipating gel flows into the inner end of the base 3 through the gaps between the straight line segments 411 and the inner wall of the base 3.

[0013] The filament 2 includes a first filament group 21 and a second filament group 22, one end of the first filament group 21 is connected to the driving component 4, and the second filament group 22 is connected to one end of the first filament group 21 away from the driving component 4 via a conductor, and the first filament group 21 and the second filament group 22 are connected in series to form a segmented filament. Comparing one long filament and two short filaments with the same total length, the total price of the two short filaments is lower than the price of one long filament, so adopting a filament with a segmented structure can save costs by about 20%.

[0014] The cavity of the bulb housing 1 is filled with an inert gas. Filling the cavity of the bulb housing 1 with an inert gas is beneficial to the presence of helium gas in the bulb housing 1, and can reduce the pressure and temperature of the gas inside the bulb. The outer surface of the bulb housing 1 is provided with a frosted layer that reduces glare while maintaining the brightness of the light. [Explanation of symbols]

[0015] 1 Bulb Housing 2 Filament 21 First filament group 22 Second filament group 3. Base 4 Drive Components 41 Aluminum substrate 411 Straight Segment 412 Arc Segment 5. Heat dissipation gel

Claims

1. 1. A high-power LED filament bulb comprising: a bulb housing (1), a filament (2), a base (3), and a driving component (4), the bulb housing (1) being connected to the base (3), the driving component (4) being attached to a cavity of the base (3), the driving component (4) including an aluminum substrate (41), at least a portion of an edge of the aluminum substrate (41) being in contact with an inner wall of the base (3), the filament (2) being attached to the cavity of the bulb housing (1) and electrically connected to the driving component (4), a heat dissipation gel (5) covering the driving component (4) being provided inside the base (3), the heat dissipation gel (5) being in contact with the inner wall of the base (3).

2. 2. The high power LED filament bulb according to claim 1, characterized in that the outer periphery of the aluminum substrate (41) is composed of four straight line segments (411) which are parallel to each other in pairs and face each other in pairs, and four arc segments (412) which are parallel to each other in pairs and face each other in pairs and are distributed on the same circumference, the outer walls of the arc segments (412) contact the inner wall of the base (3), and a gap is left between the outer walls of the straight line segments (411) and the inner wall of the base (3).

3. 2. The high power LED filament bulb according to claim 1, wherein the filaments (2) include a first filament group (21) and a second filament group (22), one end of the first filament group (21) is connected to a driving component (4), and the second filament group (22) is connected to one end of the first filament group (21) that is remote from the driving component (4).

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