KR20120076868A - Straight type led lamp - Google Patents

Abstract

PURPOSE: A tubular LED lamp is provided to improve light distribution and light diffusion performances by installing a reflecting shade in order to surround both sides of a light diffusion cover. CONSTITUTION: A plurality of uneven portions is formed on the surface of a heat sink(110). A light diffusion cover is fixed and coupled on both sides of the heat sink and forms a space unit. A reflecting shade(130) is fixed and coupled on both sides of the heat sink. A PCB substrate is arranged in the space unit of the light diffusion cover. A plurality of LEDs is mounted on the PCB substrate. A base(150) is formed while protecting both ends of the light diffusion cover. A heat absorption plate or a heat conduction adhesive tape is placed between the PCB substrate and the heat sink.

Description

Straight type LED lamp {Straight type LED lamp}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fluorescent lamps, and more particularly, to straight-type LED lamps designed to improve light efficiency and light uniformity.

In general, fluorescent lamps are the most commonly used light source around us, which is the most familiar light source. These fluorescent lamps are composed of separate parts such as fluorescent lamps and ballasts.

The fluorescent lamp is a tube shape in which fluorescent material is applied and argon gas and mercury vapor are sealed therein, and when electricity is supplied, a lighting tube (bimetal) is heated and attached to the tube, and the fluorescent lamp is a tube current when discharge starts. Is gradually increased to destroy the electrode, and a ballast such as a choke coil is used to limit the current to a certain value or less.

Most of the above-mentioned fluorescent lamps are used as illumination lamps, and the conventional fluorescent lamps are driven using a frequency of 60 Hz, so that the user may feel a lot of eye fatigue when using the lamp for a long time due to flickering 60 times per second. In use, it generates high power loss due to the increase of the ambient temperature due to its own heat generation, and there is a disadvantage that the fluorescent lamp is easily broken when overheated.

As a result, a conventional lamp such as a fluorescent lamp has a problem in that the service life is shortened due to a temperature rise and a high power loss, and a lot of parts are used, and thus, replacement cost is high.

LED fluorescent lamps have been developed to replace these fluorescent lamps, which are highly efficient in converting electric power into light, and are more economically effective than unit incandescent lamps and fluorescent lamps. In addition, since the amount of light can be obtained as desired, the stability is excellent, so the use of the lamp is gradually increasing.

In other words, LED fluorescent lamps developed to solve the problems of existing fluorescent lamps used in most homes or offices have a power consumption of only 20% than fluorescent lamps using fluorescent materials. It also has the advantage of not destroying the environment because of its life span of 10 years and no heavy metals such as lead or mercury.

The LED constituting the fluorescent lamp uses the shining property of the semiconductor, and is mainly used in liquid crystal display devices, electronic display panels, automobile instrument panels of mobile phones, but is widely used in interior lighting, signboards, backlight units of liquid crystal display devices, and general lighting. .

In addition, LED fluorescent lamps have been in the spotlight as lighting fixtures because they have about 10% to 15% lower power consumption, more than 100,000 hours of semi-permanent lifespan, and environmentally friendly characteristics compared to conventional incandescent or fluorescent lamps.

LED fluorescent lamps according to the prior art are manufactured using an LED and an opaque light diffusion cover surrounding the LED.

However, the LED fluorescent lamp according to the prior art as described above has a problem in that light efficiency and light uniformity are deteriorated by a light diffusion cover made of an opaque material configured to diffuse to the outside when the white LED emits light.

The present invention is to solve the conventional problems as described above to improve the heat dissipation characteristics through the concave-convex structure on the surface of the heat sink and at the same time install the reflection shade to surround the both sides of the light diffusion cover extending from both sides of the heat sink light It is an object of the present invention to provide an intuitive LED lamp which improves light distribution and diffusing ability by reflecting light.

In order to achieve the above object, a straight-type LED lamp according to the present invention includes a heat sink having a plurality of irregularities formed on a surface thereof, a light diffusion cover having a space portion while being fastened to both sides of the heat sink, and on both sides of the heat sink. A reflecting shade fastened and formed to surround both sides of the light diffusion cover, a PCB substrate mounted with a plurality of LEDs arranged at a predetermined interval in a space portion of the light diffusion cover, and both ends of the heat sink. It characterized in that it comprises a base formed while covering both ends of the light diffusion cover.

The straight LED lamp according to the present invention has the following effects.

First, heat dissipation characteristics can be improved by releasing heat generated when the LED is lightened by widening the area of the heat sink by configuring the surface of the heat sink to have an uneven structure.

Second, the light distribution and diffusion ability can be improved by reflecting light by installing reflection shades extending from both sides of the heat sink and covering both sides of the light diffusion cover.

1 is a perspective view schematically showing a straight-type LED lamp according to a first embodiment of the present invention
FIG. 2 is a cross-sectional view of a straight-type LED lamp along the line II-II ′ of FIG. 1.
3 is a cross-sectional view showing an LED mounted on the PCB substrate of FIG.
4 is a cross-sectional view according to another embodiment of an LED mounted on the PCB substrate of FIG. 2.
5 is a perspective view of a straight LED lamp according to a second embodiment of the present invention;

Hereinafter, a straight-type LED lamp according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically showing a straight-type LED lamp according to a first embodiment of the present invention, Figure 2 is a cross-sectional view showing a straight-type LED lamp along the line II-II 'of FIG.

The straight LED lamp 100 according to the present invention is fastened to both sides of the heat sink 110 and the hemispherical heat sink 110 is formed with a plurality of irregularities on the surface, as shown in Figs. The reflection shade 130 is fastened to both sides of the hemispherical light diffusion cover 120 having an inner space portion 116 and the heat sink 110 and formed to surround both sides of the light diffusion cover 120. And a PCB substrate 140 having a plurality of LEDs 141 mounted on the space portion 116 of the light diffusion cover 120 at regular intervals, and both ends of the heat sink 110. Base 150 formed of an insulating material while covering both ends of the light diffusion cover 120, and is formed at regular intervals in a form protruding to the outer surface of the base 150 and inserted into the socket (not shown) It is configured to include a connection pin 151 made of a conductive material.

The heat sink 110 is formed with a rib 111 protruding to extend to a lower end portion on which the PCB substrate 140 is mounted, and an insert formed in the rib 111 in the longitudinal direction of the heat sink 110. The bolt insertion hole 112 is formed.

Here, the insert bolt insertion hole 112 is a hole into which an insert bolt (not shown) is inserted to fix the base 150 to the heat sink 110.

The heat sink 110 may be configured to have a plurality of concave-convex structures in order to maximize the heat dissipation effect on the surface opposite to the surface to which the PCB substrate 140 is attached, thereby maximizing the heat dissipation effect when the LED 141 emits light. have.

Between the first insertion portion 113 formed at both ends of the heat sink 110, the plate 114 having a flat structure on the surface so that the PCB substrate 140 is mounted and the space portion 116 above the plate 114 The ribs 111 are formed to extend up to the heat sink 110.

On the other hand, the space portion 116 may extend from the plate 114 to further configure a plurality of heat dissipation blades (not shown) may improve the heat dissipation effect.

The heat sink 110 is formed in a semi-circular shape of a slim or stick type to have a predetermined length, and forms the main body of the lamp using the LED 141 in the present invention.

A converter (not shown) may be configured in the heat sink 110 or the light diffusion cover 120, which is arranged under the plate 114 and connected to each of the LEDs 141.

The converter can turn on each LED 141 even if power is input from either socket of the mercury discharge tube fluorescent lamp frame that is already installed, so it is not necessary to consider the coupling direction when installing the LED lamp to the frame, thereby enhancing consumer convenience. It cuts over voltage and over current of input power, removes surge voltage and noise from outside and supplies stable constant current of constant size to LED 141 so that each LED 141 can be turned on without blinking with constant illuminance. Bidirectional input power processing is enabled.

On the other hand, in the embodiment of the present invention has been described that the built-in converter, but not limited to this may be mounted on an external socket.

The LEDs 141 may be formed in a line on the PCB substrate 140, and further, the LEDs 141 may be arranged in a zigzag shape in both directions, or the PCB substrate 140 may be a flexible member. The LED 141 may be arranged to form a predetermined gradient and have a plurality of rows on the PCB substrate 140 to extend the irradiation range.

Except for each LED 141 is mounted on the PCB substrate 140, any one of the surface Ag, Al ₂ O ₃ , TiO ₂ , Al, PEN, PET using a white coating or attach a separate reflector Therefore, the light source may be reflected when each LED 141 emits light.

The light diffusion cover 120 is coupled to the first insertion portion 113 formed on both ends of the heat sink 110, the corresponding insertion portion 121 is formed in a hemispherical shape, the thickness of both sides than the upper center relatively It is formed to be thin, and is formed to increase the amount of light emitted to both sides to extend the directivity of the light irradiated from the LEDs (141).

That is, the light diffusion cover 120 is formed in a hemispherical shape so as to be coupled to both ends of the heat sink 110, and the thickness of both sides is formed relatively thinner than the thickness of the upper center of the light diffusion cover 120 It is preferable to increase the transmission amount of light emitted to both sides of the diffusion cover 120 to increase the directivity angle of the light irradiated from the respective LEDs 141 to increase the lighting efficiency of the lamp.

And the configuration for coupling and separation of the heat sink 110 and the light diffusion cover 120 is implemented by the detachment means described below will be described together.

The detachable means has first inserting portions 113 formed at both ends of the heat sink 110, and corresponding inserting portions 121 coupled to the first inserting portions 113 at both ends of the light diffusion cover 120. ) Is formed, and the first and second insertion parts 113 and 121 and the corresponding insertion part 121 exert and detach when the heat sink 110 and the light diffusion cover 120 are detached. ) And the light diffusion cover 120 to ensure the ease of coupling and separation.

The reflection shade 130 is formed in such a manner as to surround both sides of the light diffusion cover 120 while one side is inserted into each of the second insertion portions 115 formed above the first insertion portion 113 of the heat sink 110. Formed.

As such, when the reflector 130 is fastened to the heat sink 110 and covers both sides of the light diffusion cover 120, light distribution and light diffusion characteristics may be further improved.

The base 150 is coupled to both ends of the heat sink 110 and the light diffusion cover 120 and is coupled to both ends thereof to fix them. Although the base 150 is described as an insulating material, the base 150 is not limited thereto and may be formed of a metal material in order to maximize a heat radiation effect.

And the center of the base 150 is coupled to the connection pins 151 for supplying the power supplied from the outside to the lighting, in this case, so that the connection hole of the socket is coated with a conductive material to connect the connection pins 151 It is formed to enable the electrical connection to the LED lamp by the connection of the connection pin 151.

The insert bolt is inserted into a fastening hole (not shown) formed to correspond to the insert bolt insertion hole 112 through the surface of the base 150 to fix the base 150 to the heat sink 110. Fastening of the bolt is more stable, and even if the insert bolt is loosened and combined several times, it is possible to prevent damage to the heat sink 110 made of aluminum.

In addition, a heat absorbing plate (not shown) made of a metal material may be separately configured between the PCB substrate 140 and the plate 114 of the heat sink 110, wherein the heat absorbing plate has a thickness of 0.2 mm. While having a role to absorb the heat generated from the LED (141).

The heat absorbing plate may be connected to the rear surface of the LED 141 through the PCB substrate 140 to transfer heat to the heat sink 110 when the LED 141 emits light.

The PCB substrate 140 uses an aluminum substrate having excellent thermal conductivity. In addition, the PCB board 140 may use a metal PCB board or a PCB board of a double copper foil structure or a flexible PCB board in order to efficiently conduct heat dissipation.

Meanwhile, the heat sink 110 and the light diffusion cover 120 are described as an example of the hemispherical shape in the straight-type LED lamp according to the present invention. It is possible.

The PCB substrate 140 mounted on the heat sink 110 penetrates through the rear surface of the heat sink 110 or penetrates through the PCB substrate 140 and is fixed by a screw fastening method.

In addition, a heat conductive adhesive double-sided tape may be attached to the PCB substrate 140 to be fixed on the heat sink 110.

Without being limited to this, a sliding groove (not shown) is formed along the length direction so that the PCB substrate 140 is inserted from one side on the heat sink 110, and the PCB substrate 140 is inserted into the sliding groove to separate. It can be fixed without using the fixing means.

Except for each LED 141 is mounted on the PCB substrate 140, any one of the surface Ag, Al ₂ O ₃ , TiO ₂ , Al, PEN, PET using a white coating or attach a separate reflector Therefore, the light source may be reflected when each LED 141 emits light.

3 is a cross-sectional view illustrating an LED mounted on the PCB substrate of FIG. 2.

As shown in FIG. 3, the PCB substrate 140 includes a plurality of LEDs 141 mounted at regular intervals and a hole 143 corresponding to each of the LEDs 141. A reflection plate 142 formed on and reflecting light generated by each of the LEDs 141, and integrally formed with the reflection plates 142 and formed adjacent to each of the LEDs 141, respectively. It comprises a reflection projection 144 for reflecting the light generated by the (multi) angle.

The thickness of the reflector plate 142 is formed to be lower than the thickness of each LED 141 is mounted on the PCB substrate 140 and protrudes, the blue LED 141 inserted into the hole 143 is the reflector plate Has a projecting structure higher than the surface of 142.

Although the hole 143 formed in the reflective plate 142 has been described as being formed in a circular shape, the hole 143 may be formed in any one of a rectangle and a polygon.

The reflective plate 142 is made of a white material having excellent reflection efficiency, such as Ag, Al ₂ O ₃ , TiO ₂ , Al, PET, or the like.

The reflective protrusion 144 is formed integrally with the reflective plate 142, but in the embodiment of the present invention is formed in a conical shape, not limited to this may be formed in a horn structure in various forms, such as triangular pyramid, square pyramid, polygonal pyramid, etc. have.

In addition, the reflection protrusion 144 is formed in a shape that becomes narrower from the lower side to the upper side.

Accordingly, when the LEDs 141 emit light, the luminance is improved by reflecting upward through the reflecting protrusion 144 having a conical shape integrally with the reflecting plate 142 and the reflecting plate 142.

4 is a cross-sectional view according to another exemplary embodiment of an LED mounted on the PCB substrate of FIG. 2.

As shown in FIG. 4, instead of the reflective protrusion 144 of FIG. 3, the reflecting plate 142 is integrally formed to protrude to a predetermined height while surrounding the LEDs 141 and formed at each of the blue LEDs 141. Except for the reflection groove 145 which collects and reflects the generated light, it has the same configuration.

In the embodiment of the present invention, since the reflective groove 145 is formed in a honeycomb structure and has a predetermined inclination, the reflective groove 145 reflects the light emitted from each of the LEDs 141 and is collected and emitted upward.

Meanwhile, although the reflective groove 145 is formed to have a honeycomb structure, the present invention is not limited thereto, and the reflective groove 145 is formed in a shape of surrounding the LED 141 in a frame shape such as a rectangular frame and a polygonal frame.

Therefore, when the LEDs 141 emit light, the luminance may be improved by condensing and reflecting upwards through the reflection grooves 145 having a honeycomb structure integrally with the reflection plates 142 and the reflection plates 142.

The reflective groove 145 is formed in a semicircular shape, that is, the reflective groove 145 has a constant curvature so that the light emitted from each of the LEDs 141 can be reflected and collected and emitted upward.

Meanwhile, the reflective plate 142 of FIG. 3 and FIG. 4 is made of an insulating material or a conductive material. In the embodiment of the present invention, the reflective material is coated on the surface or formed of a material having good reflectance.

5 is a perspective view of a straight-type LED lamp according to a second embodiment of the present invention.

As shown in FIG. 5, the straight-type LED lamp according to the second embodiment of the present invention is formed to protrude at regular intervals on the outer surface of the base 150 as compared with the first embodiment, and is inserted into the socket. A fixing pin 151 made of an insulating material and protruding from the surface of the base 150 between the fixing pins 151 to form a connection pin 152 made of a conductive material inserted into the socket. Except that, the rest have the same configuration.

Here, the base 150 and the fixing pin 151 is formed integrally, and is inserted into the socket to support the LED fluorescent lamp 100. The connection pin 152 is inserted into the socket and is supplied with power to emit the LED 141 mounted on the PCB board 140.

Therefore, by forming the fixing pin 151 which is formed to protrude on the base 150 and the surface of the insulating material and forming the connecting pin 152 inserted into the socket between the fixing pin 151, LED fluorescent lamp more safely Can be fixed

On the other hand, as compared with the second embodiment of the present invention, at least one graphite pattern line (not shown) inserted between the unevenness of the heat sink 110 in the longitudinal direction of the heat sink 110 is formed, and each LED ( When the heat is generated by the light emitting device 141, the heat radiation time may be shortened by absorbing heat more rapidly and radiating heat to the outside.

In another embodiment of the present invention, an air vent (not shown) having a plurality of holes in the base 150 is formed to correspond to the space 116 between the heat sink 110 and the light diffusion cover 120. You may.

On the other hand, the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible that various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention It will be apparent to those skilled in the art.

110: heatsink 120: light diffusion cover
130: reflection shade 140: PCB substrate
150: base

Claims (8)

A heat sink having a plurality of irregularities formed on its surface,
A light diffusion cover having a space portion while being fastened to both sides of the heat sink;
A reflection shade fastened to both sides of the heat sink and formed to surround both sides of the light diffusion cover;
A PCB board mounted with a plurality of LEDs arranged at regular intervals in a space portion of the light diffusion cover;
A straight-type LED lamp comprising a base formed to surround both ends of the light diffusion cover, including both ends of the heat sink. According to claim 1, wherein the heat sink is a lower end portion protruding to the concave-convex portion to mount the PCB substrate, and the insert bolt insertion hole formed in the longitudinal direction of the heat sink is formed in the rib Intuitive LED lamp. The straight-type LED lamp of claim 1, further comprising a heat absorbing plate or a heat conductive adhesive tape formed between the PCB substrate and the heat sink. The straight-type LED lamp of claim 1, wherein the PCB substrate is made of any one of a metal PCB substrate, a double copper foil PCB substrate, and a flexible PCB substrate. The reflector of claim 1, further comprising: a reflector formed on the PCB substrate having holes corresponding to the LEDs to reflect light generated from the LEDs, and integrally formed with the reflector and adjacent to the LEDs. And a reflection protrusion configured to reflect the light generated by each of the LEDs at various angles. The straight-line LED of claim 5, wherein the LED is integrally formed with the reflecting plate and is formed to protrude to a predetermined height while wrapping around each of the LEDs, and includes a reflecting groove that collects and reflects the light generated by the LEDs. lamp. The straight LED lamp of claim 1, further comprising a connection pin or a fixing pin configured to have a predetermined interval in a form protruding from the outer surface of the base and inserted into the socket. The straight type LED lamp of claim 7, wherein the connection pin or the fixing pin has a 2-pin or 3-pin structure.

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