LED lighting lamp

A light emitting diode lighting lamp includes: an LED module having at least one LED PCB and a plurality of LED devices which are disposed on the LED PCB; a cover enclosing the LED module; and a pair of bases which are respectively connected to both ends of the cover. The respective base includes: a cap which coupled to an end of the cover; a pin portion for applying electricity to the LED module; a fixing portion surrounding a lower end of the pin portion to fix the pin portion; and a guard which is formed to be higher than an end of the pin portion and encloses the pin portion along a circumference direction.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2010-0030174 filed in the Korean Intellectual Property Office on Apr. 2, 2010, the entire contents of which are incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to a light emitting diode (LED) lighting lamp.

BACKGROUND ART

In case of a conventional fluorescent lamp device, a fluorescent lamp is fitted into a socket having G13 Base of a lamp mount. A pin portion of G13 Base may be deformed by a long time use, and this may cause a safety problem that the fluorescent lamp may be separated and dropped.

An LED fluorescent lamp may also use G13 Base and thus it is used to be connected to a conventional lamp mount, so if a user may connect the LED fluorescent lamp to a conventional ballast stabilizer, electric shock or fire may occur and this may raise credibility problem of the LED fluorescent lamp.

Technical Problem

The present invention has been made in an effort to provide a light emitting diode lighting lamp which can prevent product damages and fire risk.

In addition, the present invention has been made in an effort to provide a light emitting diode lighting lamp which breakdown or safety accident due to drop and angle of light emission can be widened.

Technical Solution

A light emitting diode lighting lamp according to an exemplary embodiment of the present invention includes: a light emitting diode (LED) module having at least one light emitting diode (LED) printed circuit board (PCB) and a plurality of light emitting diode devices which are disposed on the LED PCB; a cover enclosing the LED module; and a pair of bases which are respectively connected to both ends of the cover. The respective base includes: a cap which coupled to an end of the cover; a pin portion for applying electricity to the LED module; a fixing portion surrounding a lower end of the pin portion to fix the pin portion; and a guard which is formed to be higher than an end of the pin portion and encloses the pin portion along a circumference direction.

The pin portion may include two pins which have respectively a rod shape and are arranged to be parallel with one another, and the two pins may be respectively extended in a vertical direction at the outside of the cap and are extended to penetrate the cap to reach an inside of the cover.

Each of the pair of the bases may be a R17D base standard.

The LED module may include a converter which converts an alternating current into a direct current and supplies the converted direct current to the LED PCB.

The LED PCB may have a rod shape, and the plurality of the LED devices may be arranged on an upper surface of the LED PCB in a line along a longitudinal direction of the rod shape.

The cover may include a light diffusion cover which has a hollow cylindrical shape to enclose the LED PCB to diffuse light emitted from the LED devices.

The light diffusion cover may include inner grooves which are formed on both sides of an inner surface thereof along a longitudinal direction to be connected with the LED PCB.

The light diffusion cover may be made of diffusing type polycarbonate or diffusing type glass.

The cover may include: a light diffusion cover which encloses the LED devices to diffuse light emitted from the LED devices; and a heat radiation plate which encloses a lower surface of the LED PCB to dissipate heat of the LED PCB.

The light diffusion cover and the heat radiation plate may be connected to one another to form a hollow cylindrical shape.

The heat radiation plate may include: outer grooves which are formed on both sides of an outer surface thereof along a longitudinal direction of the hollow cylindrical shape to be connected to the light diffusion cover; and inner grooves which are formed on both sides of an inner surface thereof along a longitudinal direction of the hollow cylindrical shape to be connected to the LED PCB.

The heat radiation plate may include: outer grooves which are formed on both sides of an outer surface thereof along a longitudinal direction of the hollow cylindrical shape to be connected to the light diffusion cover; and a protrusion which is formed along a longitudinal direction of the hollow cylindrical shape and to which the LED PCB is mounted.

An upper surface of the protrusion may be divided into two portions and a sectional view thereof is a shape of a caret symbol ^, and wherein the at least one LED devices may be provided two and the LED devices are respectively disposed on the divided portions of the upper surface of the protrusion.

The light diffusion cover may be made of diffusing type polycarbonate or diffusing type glass.

The heat radiation plate may be formed by a double injection molding with ABS (Acrvlonitrile/Butadien/Styrene), PPS (Poly Phenylene Sulfide), and PPA (Poly Phthal Amide).

The LED module may include a converter which converts an alternating current into a direct current and supplies the converted direct current to the LED PCB.

Advantageous Effects

According to the present invention, by using a base of R17D Base standard, the pin portion which is an electrode is not exposed to the outside so that electric shock or fire risk can be prevented so as to enhance stability, and damage of a product or fire risk which may occur when an LED lighting lamp of G13 Base is being connected to a ballast stabilizer for a conventional fluorescent lamp of G13 Base can be prevented.

Furthermore, since a circular light diffusion cover is used, weight of the device can be reduced and breakdown or safety accident due to drop can be prevented.

Furthermore, since the plurality of the light emitting diode devices are arranged in various angles, angle of light emission can be widened.

DETAILED DESCRIPTIONS OF THE EMBODIMENTS

Embodiments of the present invention will be explained with reference to the accompanied drawings hereinafter.

FIG. 1is a perspective view of a light emitting diode lighting lamp according to an embodiment of the present invention, andFIG. 2is a front view of a light emitting diode lighting lamp according to an embodiment of the present invention.

FIG. 3is a top view of a light emitting diode lighting lamp according to an embodiment of the present invention,FIG. 4is a cross sectional view taken along a line IV-IV inFIG. 3,FIG. 5is a side view of a light emitting diode lighting lamp according to another embodiment of the present invention, andFIG. 6is a cross sectional view taken along a line VI-VI inFIG. 3.

Referring toFIG. 1toFIG. 6, a light emitting diode (LED) lamp according to an embodiment of the present invention includes a light emitting diode (LED) module110which includes at least one LED printed circuit board (PCB)113and a plurality of light emitting diode devices111, and a cover120enclosing the LED module110.

The LED lighting lamp may include a pair of bases130which are respectively coupled to both ends of the cover120. The respective base130includes a cap131coupled to an end of the cover121, a pin portion133for applying electricity to the LED module110, a fixing portion135surrounding a lower end of the pin133to fix the pin portion133, and a guard portion137which is formed to be higher than an end of the pin portion133and encloses the pin portion133along a circumference direction.

The LED PCB113plays a role of fixing the plurality of the LED devices111which emit light and electrically connecting the same. Further, the fixing portion135which fixes the pin portion133may be made of plastic injection molding.

Referring toFIG. 4, the pin portion133includes two pins133aand133bwhich have respectively a rod shape and are arranged to be parallel with one another, and the two pins133aand133bmay be extended in a vertical direction at the outside of the cap131so as to be connectable with an external electric power socket and at the same time may be respectively extended to penetrate the cap131to reach the inside of the cover120so as to be connected to the LED module110. That is, electric power is supplied to the LED module110from the external electric power socket via the pins133aand133b.

Referring toFIG. 3andFIG. 4, the guard portion137may be formed to be longer (higher) than the pin portion133, i.e., be protruded from the end of the pin portion137, so as to make the pin portion133not be easily touched by a hand of a user, etc.

The pair of the bases130may have a R17D base standard. That is, the shape of the base130may be a shape in accordance with a R17D base standard.

According to an embodiment of the present invention, by using the base130of R17D Base standard type, the pin portion133which is an electrode is not exposed so that user's electric shock or fire risk can be prevented so as to enhance safety, and damage of a product or fire risk which may occur when an LED lighting lamp of G13 Base is being connected to a ballast stabilizer for a conventional fluorescent lamp of G13 Base can be prevented.

Referring toFIG. 4, the LED module110may further include a converter115which converts an alternating current into a direct current and supplies the converted direct current to the LED PCB113. As shown inFIG. 4, the converter115may be disposed on both ends of an upper surface of the LED PCB113, and converts an alternating current of 110 to 220V into a direct current.

Referring toFIG. 4andFIG. 6, the LED lighting lamp include the LED module110having the at least one LED PCB113and a plurality of the LED device111disposed on an upper surface of the LED PCB113, and the cover120enclosing the LED module110, and the LED PCB113may have a rod shape and the plurality of the LED devices111may be arranged in a line along a length direction of the LED device111on an upper surface of the LED PCB113.

In addition, referring toFIG. 4andFIG. 6, the cover120may include a light diffusion cover121which encloses the LED device111to diffuse light emitted from the LED device111and a heat radiation plate123which encloses a lower surface of the LED PCB113to dissipate heat of the LED PCB113.

Referring toFIG. 2andFIG. 6, a sectional shape of the light diffusion cover121is a half-circle shape and the light diffusion cover121has a tube shape which is elongated in a later direction shown inFIG. 2and its lower side is open to enclose the plurality of the LED devices111. In addition, a sectional shape of the heat radiation plate123is a half-circle shape and the heat radiation plate123has a tube shape which is elongated in a lateral direction shown inFIG. 2and its upper side is open to enclose a lower surface of the LED PCB113.

Further, as shown inFIG. 6, the light diffusion cover121and the heat radiation plate123are connected to one another to form a circular hollow tube.

The LED PCB113is disposed between the light diffusion cover121and the heat radiation plate123and is connected to the light diffusion cover121or the heat radiation plate123. Referring toFIG. 6, the heat radiation plate123may include outer grooves123bwhich are formed respectively on both outer surfaces thereof along a longitudinal direction and to which the light diffusion cover121is connected, and inner grooves123awhich are formed respectively on both inner surfaces thereof along a longitudinal direction and to which the LED PCB113is connected.

That is, lower ends of the light diffusion cover121are respectively fitted into the outer grooves123bof the heat radiation plate123so that the light diffusion cover121and the heat radiation plate123can be coupled.

Further, the LED PCB113may be fitted into the inner grooves123aof the heat radiation plate123. As an example, the LED PCB113may be formed as one, and both end portions of the LED PCB113are respectively fitted into the inner grooves123aof the heat radiation plate123. As another example, at one of the LED PCB113may be formed as two, end portions of the two LED PCBs113are fitted into the inner grooves123aof the heat radiation plate123.

That is, the above-stated connections are examples, and the LED PCB113can be disposed within a space formed by the light diffusion cover121and the heat radiation plate123in various ways. The inner grooves123aof the heat radiation plate123may also be varied in accordance with the structure of the LED PCB113. The way of connections of the light diffusion cover121, the heat radiation plate123and the LED PCB113may be preferably determined in consideration of light diffusion efficiency and reduction of dazzle by the light diffusion cover121and heat radiation efficiency by the heat radiation plate123.

Furthermore, in a conventional lamp device using a light emitting diode, a light emitting diode module is attached to an inner upper surface of a cover frame and a light diffusion plate which covers very wide area is attached to a lower side of the cover frame, so the expensive light diffusion plate is used much to raise manufacturing cost and the light diffusion plate is far from the LED device so that light efficiency is deteriorated, but in the present invention a distance between the light diffusion cover121and the LED device111is minimized and the light diffusion cover121is minimally used, so light efficiency can be enhanced and at the same time eye dazzle can be reduced, and manufacturing cost and weight can be reduced.

An air layer210may be formed between the heat radiation plate123and a lower surface of the LED PCB113. In addition, an air layer220may also be formed between the light diffusion cover121and an upper surface of the LED PCB113. The air layers210and220can prevent the LED PCB113from being bent by heat.

It is preferable that the light diffusion cover121is made of material which can diffuse uniformly light emitted from the LED device111, and accordingly the light diffusion cover121is made of diffusing type polycarbonate or diffusing type glass.

The heat radiation plate123may be made of aluminum. Aluminum can effectively radiate heat and at the same time is light-weight. As such, weight reduction can prevent parts from being deformed, so safety accident by drop of parts caused by deformation can be prevented.

The heat radiation plate123may be formed by a double injection molding using ABS, PPS, and PPA. That is, the heat radiation plate123can increase a bending intensity of the light diffusion cover121by being coupled with the light diffusion cover121, and the heat radiation plate123may be formed by a double injection molding using material such as ABS(Acrvlonitrile/Butadien/Styrene), PPS(Poly Phenylene Sulfide), and PPA(Poly Phthal Amide), which are different material from that of the light diffusion cover121. Here, a double injection molding means an injection molding which is performed using different plural materials. A thermal-resisting property can be enhanced by a double injection molding. The heat radiation plate123which is formed in this way can effectively radiate heat.

FIG. 7is a cross sectional view of a light emitting diode lighting lamp according to another embodiment of the present invention.

Referring toFIG. 7, in an LED lighting lamp according to another embodiment of the present invention, the heat radiation plate123may include outer grooves123bwhich are formed respectively on both outer surfaces thereof along a longitudinal direction and to which the light diffusion cover121is connected, and a protrusion123cwhich is formed along a longitudinal direction of the hollow cylindrical shape and to which the LED PCB113is mounted.

In more detail, as shown inFIG. 7, an upper surface of the protrusions123cis divided into two portions so as to form a shape of a caret symbol A and the LED PCBs113are formed as two and the two LED PCBs113are respectively disposed on the divided upper surface of the protrusion123c.

Further, the protrusion123cmay be divided into three or more portions, and three or more LED PCBs113are disposed on an upper surface thereof.

Since the plurality of the light emitting diode devices are arranged in various angles, angle of light emission can be widened.

An air layer210may be formed between the heat radiation plate123and a lower surface of the protrusion123c.In addition, an air layer220may also be formed between the light diffusion cover121and upper surfaces of the LED PCBs113. The air layers210and220may prevent the LED PCB113being bent by heat.

It is preferable that the light diffusion cover121is made of material which can diffuse uniformly light emitted from the LED device111, and accordingly the light diffusion cover121is made of diffusing type polycarbonate or diffusing type glass.

The heat radiation plate123may be formed by a double injection molding using ABS, PPS, and PPA. That is, the heat radiation plate123can increase a bending intensity of the light diffusion cover121by being coupled with the light diffusion cover121, and the heat radiation plate123may be formed by a double injection molding using material such as ABS(Acrvlonitrile/Butadien/Styrene), PPS(Poly Phenylene Sulfide), and PPA(Poly Phthal Amide), which are different material from that of the light diffusion cover121. Here, a double injection molding means an injection molding which is performed using different plural materials. A thermal-resisting property can be enhanced by a double injection molding. The heat radiation plate123which is formed in this way can effectively radiate heat.

FIG. 8is a cross sectional view of a light emitting diode lighting lamp according to yet another embodiment of the present invention.

As shown inFIG. 8, in an LED lighting lamp according to yet another embodiment of the present invention, the cover120may include the light diffusion cover121which has a hollow cylindrical shape and encloses the LED PCB113to diffuse light emitted from the LED device111.

The LED PCB113on which the plurality of the LED devices11are mounted can be enclosed by the cylindrical shape member which is obtained by the combination of the light diffusion cover121and the heat radiation plate123, and in case that the light diffusion cover121has a cylindrical shape, the heat radiation plate123can be omitted. That is, The LED PCB113on which the plurality of the LED devices11are mounted can be enclosed only by the light diffusion cover121. Exemplarily, the LED PCB113can be inserted into a cylindrical glass tube or a cylindrical diffusion tube.

The light diffusion cover121may include inner grooves121awhich are formed on both sides of an inner surface thereof, and the LED PCB113can be coupled to the inner grooves121a.

As such, by using a circular diffusion cover, weight of the device can be reduced so that breakdown or safety accident due to drop of the diffusion cover can be prevented.

It is preferable that the light diffusion cover121is made of material which can diffuse uniformly light emitted from the LED device111, and accordingly the light diffusion cover121is made of diffusing type polycarbonate or diffusing type glass.