KR101447946B1 - Led lamp for fpl socket - Google Patents

Abstract

An LED lamp for a FPL socket according to an aspect of the present invention comprises: a heat dissipation cover formed long in one direction and having a plurality of radiating projections to be protruded; a light diffusion cover coupled with the heat dissipation cover and having a light transparency; and a substrate disposed between the light diffusion cover and the heat dissipation cover and mounted with a plurality of LED elements. The LED elements are arranged in a plurality of rows. Converter devices for converting current are disposed between the rows of the LED elements. And a widthwise central portion of the light diffusion cover is thicker than the widthwise outer portion thereof.

Description

FPL socket LED lamp {LED LAMP FOR FPL SOCKET}

The present invention relates to an LED lamp, and more particularly, to an LED lamp applicable to an FPL socket.

BACKGROUND ART [0002] In recent years, LED devices have been spotlighted as light sources for various lighting devices. The LED element has advantages such as less heat generation, less power consumption, longer lifetime, and impact resistance than a conventional illumination light source. In addition, since mercury or a discharge gas is not used in the manufacturing process like a fluorescent lamp, there is an advantage that it does not cause environmental pollution.

If the LED device provides adequate power supply and heat dissipation means, it can maintain the lighting state without burning even if used for over 100,000 hours. All light sources decrease in light output as time passes. Since 80% of the initial brightness is not felt well by people, the life expectancy of LED devices is expected to be about 40,000 to 50,000 hours.

Therefore, compared with 1,500 hours of incandescent lamps and 10,000 hours of fluorescent lamps, LED devices have a long lifetime and can be said to be light sources.

However, if the existing fluorescent socket is discarded in order to use the LED lamp, not only the resources are wasted but also the expensive socket is required to use the LED lamp.

Particularly, the FPL (Fluorescent Parallel Lamp) type lamp is a U-shaped lamp having a structure in which the conventional straight tube lamp is folded into two, unlike the straight tube type lamp, four terminals are provided on the other side. It is also necessary to simply apply the LED lamp to the socket for such a FPL type lamp.

In addition, when a circuit element for current conversion in the LED lamp is disposed between the LED elements, the light emitted from the LED elements is blocked by the circuit element, so that the center portion in the width direction of the LED lamp appears relatively dark .

[Related Technical Literature]

1. FPL type LED lamp (Korean Patent No. 10-1202412)

SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED lamp applicable to an FPL type socket.

Another object of the present invention is to provide an LED lamp having a uniform brightness distribution in the width direction.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an LED lamp for an FPL socket, the LED lamp including a heat dissipation cover having a plurality of heat dissipating protrusions protruded, a light diffusion cover having light transmittance, And a substrate on which a plurality of LED elements are mounted, wherein the LED elements are arranged in a plurality of rows, and converter elements for current conversion are disposed between the rows of the LED elements And the widthwise center portion of the light diffusion cover has a greater thickness than the widthwise outer portion.

A light diffusing projection protruding toward the substrate may be formed at a widthwise center of the optical acid cover.

The light diffusion cover may include a front diffusing portion that gradually increases in thickness toward the center, and a side diffusion portion that is connected to a side end of the front diffusing portion and has a uniform thickness.

The thickness of the light diffusion cover at the widthwise central portion may be 1.2 to 3 times the thickness of the side diffusion portion.

In addition, the LED elements may form two rows spaced apart from each other in the width direction of the substrate, and the front diffusing portion may be positioned between the axes passing through the centers of the LED elements forming different rows.

The front diffusing portion may have a symmetrical structure with respect to a line passing through the center in the width direction of the front diffusing portion.

In addition, an insulating plate may be provided between the substrate and the heat radiating cover, and the insulating plate may include a base contacting the bottom of the heat radiating cover and a side plate projecting from the base toward the substrate.

The insulating plate may further include an upper support portion bent at an end of the side plate and protruding toward the center of the insulating plate in the width direction.

The heat dissipation cover may have a first support rib and a second support rib formed as a fastening groove, and the first support rib and the second support rib may abut the lower surface of the substrate to support the substrate.

The first support rib may be formed with a support protrusion protruding toward the widthwise center of the heat radiating cover, and the support protrusion may be in contact with the side plate.

A first fixing protrusion and a second fixing protrusion are formed in the heat radiating cover and are spaced apart from each other to form a support groove. A support protrusion may be formed at an end of the side diffusion portion and inserted into a support groove formed in the heat radiating cover.

In addition, an end cap made of a light transmitting material may be fixed to one end of the heat radiation cover in the longitudinal direction.

In addition, a screw for fixing the end cap and the heat radiating cover may be fastened to the fastening groove.

A terminal cap having four terminals may be fixed to the other end of the heat radiating cover in the longitudinal direction, and the terminal cap may be fixed to the heat radiating cover by a screw inserted into the fastening groove.

The LED lamp for FPL socket of the present invention is formed such that the center of the optical acid cover has a larger thickness than the widthwise outer side, so that even when the light is blocked by the circuit elements disposed between the LED elements, Can be improved.

In addition, since the insulating plate is disposed between the heat radiating cover and the substrate, the circuit element and the heat radiating cover can be abutted against each other to prevent the occurrence of a short circuit.

1 is a perspective view illustrating an LED lamp according to an embodiment of the present invention.
2 is an exploded perspective view illustrating an LED lamp according to an embodiment of the present invention.
3 is a cross-sectional view of an LED lamp according to an embodiment of the present invention.

The present invention can be variously modified and may have various embodiments, and specific embodiments will be described in detail with reference to the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, the present invention and its preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating an LED lamp according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating an LED lamp according to an embodiment of the present invention. Sectional view of the LED lamp.

1 to 3, the LED lamp 100 for an FPL socket according to the present embodiment includes a substrate 40 on which a plurality of LED elements 42 are mounted, a light diffusion cover 10, a heat radiation cover 20, an insulating plate 60, an end cap 30, and a terminal cap 70.

The substrate 40 is formed of a plate extending in one direction and may be formed of a printed circuit board (PCB). A plurality of LED elements 42 are mounted on the substrate 40 and the LED elements 42 are arranged in two rows spaced apart in the width direction of the substrate 40.

Converter elements (50) for current conversion are provided between the columns of the LED elements (42). The substrate 40 is provided with a plurality of converter elements 50 arranged in a line along the longitudinal direction of the substrate 40. The converter elements 50 may include capacitors and the like as elements for converting alternating current to direct current.

When the converter elements 50 are disposed on the substrate 40, the space utilization efficiency of the LED lamp 100 is improved because there is no need to provide a separate converter. However, as shown in FIG. 3, the converter elements 50 have the disadvantage of covering light emitted from the LED elements 42. When the light emitted from the LED elements 42 is obscured by the converter elements 50, the amount of light incident on the central portion in the width direction of the LED lamp 100 is reduced, The problem of degradation occurs.

The light diffusion cover 10 is made of a material having light transmittance and is formed into a plate shape extending in one direction. The light diffusion cover 10 includes a front diffusion portion S1 having a thickness gradually increasing toward the center and a side diffusion portion S2 having a uniform thickness connected to a side end of the front diffusion portion S1. The inner surface of the front diffusion portion S1 has a substantially arc-shaped cross-section and protrudes in the direction toward the center of the light diffusion cover 10. [ The front diffusion portion S1 has a symmetrical structure about a line passing through the center in the width direction of the front diffusion portion S11.

The front diffusing portion S1 is located between the axes passing through the centers of the LED elements 42 forming different rows. That is, one end of the front diffusion part S1 is in contact with the center axis X1 of the LED element 42 located in one side, and the other side end of the front diffusion part S1 is in contact with the LED element 42 located in the other side. And the center axis X2 of the center axis X2.

The present invention is not limited thereto and one end portion of the front diffusion portion S1 may be located inside the center axis X1 of the LED element 42 located at one side of the front side diffusion portion S1, May be located inside the central axis X2 of the LED element 42 located in the other row.

Accordingly, the light diffusion cover 10 is formed such that the widthwise center portion has a greater thickness than the widthwise outer portion. Also, a light diffusion projection 15 protruding toward the substrate 40 is formed in the widthwise center of the light diffusion cover 10.

The thickness T1 at the widthwise central portion of the light diffusion cover 10 is 1.2 to 3 times the thickness T2 at the side diffusion portion S2. If the thickness T1 of the center portion in the width direction is formed smaller than 1.2 times the thickness T2 of the side diffusion portion S2, there is a problem that the brightness at the center portion of the LED lamp 100 is smaller than the brightness of the surrounding region . If the thickness T2 of the center portion in the width direction is larger than three times the thickness T2 of the side diffusion portion S2, transparency may be lowered and light loss may occur.

The front diffusing unit S1 is installed to face the substrate 40 and the side diffusing unit S2 is connected to both sides of the front diffusing unit S1 to support the front diffusing unit S1.

The side diffusion part S2 is coupled to the heat dissipation cover 20. The support part 12 is bent at the end of the side diffusion part S2 and inserted into the support groove 27 formed in the heat dissipation cover 20 . The support protrusion 12 is bent at the lower end of the side diffusion portion S2. The support protrusions 12 are formed along the longitudinal direction of the light diffusion cover 10 and protrude inwardly of the side diffusion portion S2 and are inserted into the support grooves 27. [ The light diffusing cover 10 has two side diffusions S2 so that the two support protrusions 12 are combined with the heat dissipating cover.

The heat radiation cover 20 is arranged to face the light diffusion cover 10 with the substrate 40 therebetween and the heat radiation cover 20 and the light diffusion cover 10 are combined to form an internal space. The heat dissipation cover 20 is formed of a metal such as aluminum having a long thermal conductivity in one direction.

A plurality of heat dissipation protrusions 21 are formed on the outer surface of the heat dissipation cover 20. The heat dissipation protrusions 21 are spaced apart from each other along the width direction of the heat dissipation cover 20. [ The heat dissipating protrusions 21 are formed so as to extend in the longitudinal direction of the heat dissipating cover 20.

On the inner surface of the heat dissipation cover 20, a first support rib and a second support rib 24 facing the first support rib 23 are protruded. The first support ribs 23 and the second support ribs 24 are formed so as to extend from one lengthwise end to the other end of the heat radiating cover 20. The first support ribs 23 and the second support ribs 24 are formed at both edges of the heat radiation cover 20 in the width direction.

A coupling groove 25 is formed between the first supporting rib 23 and the second supporting rib 24, and the coupling groove 25 has a substantially circular longitudinal cross-section. The first support ribs 23 and the second support ribs 24 are formed to abut the lower surface of the substrate 40 and support both edges of the substrate 40.

The first support ribs 23 are formed with support protrusions 23a protruding in the direction toward the center in the width direction of the heat radiation cover 20. The first fixing protrusions 26 and the second fixing protrusions 28 protrude from both sides of the heat dissipation cover 20 and the first fixing protrusions 26 and the second fixing protrusions 28 are spaced apart from each other. do. A support groove 27 is formed between the first fixing protrusion 26 and the second fixing protrusion 28. The first fixing protrusion 26 and the second fixing protrusion 28 are inserted into the support groove 27 So that the support protrusions 12 are not separated.

Between the substrate 40 and the heat dissipation cover 20, an insulation plate 60 is formed to extend in the longitudinal direction of the heat dissipation cover 20. The insulating plate 60 includes a base 61 abutted against the bottom of the heat radiating cover 20, a side plate 62 protruding from the base 61 toward the substrate 40, and a side plate 62 extending from the side plate 62 to the side of the insulating plate 60 And an upper support portion 63 protruding toward the center in the width direction.

The side plate 62 abuts against the support protrusion 23a and is formed so as to be erected in a direction toward the substrate and inclined toward the center in the width direction of the insulating plate 60. [ Since the side plate 62 is fixed to the inside of the support protrusion 23a, the insulation plate 60 can be prevented from being detached from the heat radiation cover 20. The upper support portion 63 is bent at the end of the side plate 62 and disposed parallel to the substrate 40 and abuts against the lower surface of the substrate 40 below the substrate 40 to support the substrate 40.

The converter element 50 is fixed to the substrate 40 by soldering or the like, and a conductive protrusion 52 made of a solder protrusion or a wire is protruded to the lower side of the substrate 40. The insulating plate 60 prevents the conductive protrusions 52 and the heat radiating cover 20 from abutting between the substrate 40 and the heat radiating cover 20 to prevent a short circuit from occurring.

A screw for fixing the terminal cap 70 and the heat dissipation cover 20 is inserted into one longitudinal end of the coupling groove 25 and an end cap 30 is connected to the other end of the coupling groove 25 in the longitudinal direction. And a screw for fixing the heat dissipation cover 20 are inserted. A screw thread is formed at an end portion of the fastening groove 25 in the longitudinal direction, and the screws are screwed into the fastening groove.

When the screw is inserted into the engagement groove 25, the first support rib 23 is pushed by the screw and the first support rib 23 presses and supports the side plate 62, Can be stably fixed to the heat dissipation cover (20).

As shown in FIG. 1, the end cap 30 is installed so as to surround the longitudinal ends of the light diffusion cover 10 and the heat dissipation cover 20. The end cap 30 is made of a light-transmitting material and is coupled to the heat radiation cover 20 by screws. The screw passes through the end cap 30 and is inserted into the coupling groove 25 described above. When the end cap 30 is made of a light-transmitting material, light is emitted through the end cap 30, so that light efficiency is improved.

The terminal cap 70 has four terminals 72, and the terminals 72 are inserted into the FPL type socket to receive the AC current from the FPL type socket.

The terminal cap 70 is installed so as to surround one end in the longitudinal direction of the heat radiation cover 20 and the light diffusion cover 10. The terminal cap 70 is fixed to the heat dissipation cover by screws. The screw penetrates the bottom of the groove formed in the terminal cap 70 and is coupled to the engagement groove 25 formed in the heat dissipation cover 20.

As described above, according to the present embodiment, since the center portion in the width direction of the light diffusion cover 10 is formed to have a greater thickness than the width direction outside portion, the light entering the center of the width direction of the LED lamp 100 can be increased have. Accordingly, the light is shielded by the converter element 50 to prevent the widthwise central portion of the LED lamp 100 from becoming dark, and the LED lamp 100 can maintain a uniform brightness.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention , And are not intended to limit the scope of the present invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: LED lamp
10: Light diffusion cover
12: support projection
15: light diffusion projection
20: Heat-radiating cover
21: heat radiating projection
23: first supporting rib
23a: support projection
24: second supporting rib
25: fastening groove
26: first fixing projection
27: Support groove
28: second fixing projection
30: End cap
40: substrate
42: LED element
50: converter element
52: conductive projection
60: Insulation plate
61: Base
62:
63: upper support
70: Terminal cap
72: terminal

Claims (14)

A heat dissipation cover formed to extend in one direction and having a plurality of heat dissipation protrusions protruded therefrom;
A light diffusion cover which is coupled to the heat radiation cover and has light transmittance; And
A substrate disposed between the heat dissipation cover and the light diffusion cover and having a plurality of LED elements mounted thereon;
/ RTI >
The LED elements are arranged in a plurality of rows,
Converter elements for current conversion are arranged between the columns of the LED elements,
Wherein the light diffusion cover has a widthwise center portion that is greater than a widthwise outer portion of the light diffusion cover and a light diffusing projection protruding toward the substrate is formed at a widthwise center of the light diffusion cover,
Wherein the light diffusion cover includes a front diffusion portion having a gradually increasing thickness toward the center and a side diffusion portion connected to a side end of the front diffusion portion and having a uniform thickness, And the thickness of the side diffusion portion is 1.2 to 3 times the thickness of the side diffusion portion.
delete delete delete The method according to claim 1,
Wherein the LEDs form two rows spaced apart in the width direction of the substrate and the front diffusions are located between axes passing through centers of the LEDs which form different rows.
6. The method of claim 5,
Wherein the front diffusing portion has a symmetrical structure with respect to a line passing through the center in the width direction of the front diffusing portion.
The method according to claim 1,
Wherein an insulation plate is provided between the substrate and the heat dissipation cover, and the insulation plate includes a base contacting the bottom of the heat dissipation cover and a side plate protruding from the base toward the substrate.
8. The method of claim 7,
Wherein the insulating plate further comprises an upper support portion bent at an end of the side plate and protruding toward the center of the insulating plate in the width direction.
9. The method of claim 8,
Wherein the heat dissipation cover has a first support rib and a second support rib formed as a fastening groove and the first support rib and the second support rib abut the lower surface of the substrate to support the substrate. LED lamp.
10. The method of claim 9,
Wherein the first support rib is formed with a support protrusion protruding toward the widthwise center of the heat radiating cover,
And the support protrusion abuts the side plate.
11. The method of claim 10,
A first fixing protrusion and a second fixing protrusion are formed in the heat radiating cover and are spaced from each other to form a supporting groove, and a support protrusion is formed at an end of the side diffusion portion and inserted into a supporting groove formed in the heat radiating cover. LED lamp for.
12. The method of claim 11,
And an end cap made of a light transmitting material is fixed to one longitudinal end of the heat dissipation cover.
13. The method of claim 12,
And a screw for fixing the end cap and the heat radiating cover is inserted into the fastening groove.
13. The method of claim 12,
Wherein a terminal cap having four terminals is fixed to the other longitudinal end of the heat dissipation cover and the terminal cap is fixed to the heat dissipation cover by a screw inserted into the fastening groove.

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