KR101285867B1 - Led lamp - Google Patents

Abstract

According to the present invention, a cap-type holder for fixing a lens or a reflector is manufactured and used as a heat-resistant transparent resin and a light diffuser material. The present invention relates to an LED lighting lamp which further improves light efficiency by scattering and diffusing light through the cap-shaped light diffusion holder to emit light in front and side thereof. The LED lighting lamp has a conical LED module accommodating portion having an annular rim at the enlarged front outer shell opening in an extended conical shape, and having a cylindrical housing at the rear, and the conical LED A hollow heat sink in which a plurality of heat dissipation fins are formed at an outer circumference of the module accommodating part; A disc shaped LED module which is accommodated in the conical LED module accommodating portion and includes a plurality of LED chips that emit light to the outside according to a power supply toward the front; A lens unit comprising a plurality of conical lenses positioned in front of each LED chip to improve directivity by collecting light emitted from each LED chip of the LED module; The conical LED module is fixedly coupled to the annular rim of the accommodating part and is fixed while covering the LED module and the lens part in sequence. The light refracted and reflected from the lens part is further diffused by scattering to emit the sides and the front thereof. It consists of a cap type light diffusion holder.

Description

LED lighting lamp {LED LAMP}

The present invention relates to an LED lighting lamp, and more particularly, by using a cap-shaped holder for fixing the lens or reflector made of a heat-resistant transparent resin and light diffuser material that can be transmitted laterally and forward, through the lens The light efficiency is further enhanced by scattering and diffusing the light of the LED chip refracted and diffused forward, as well as the light reflected and bounced through the lens and lost laterally through the side and the front of the cap-shaped light diffusion holder. Relates to an LED lighting lamp.

In general, the conventional lighting device was an incandescent lamp, tungsten, halogen, etc., but in recent years, such as home or office, or indoors such as street lamps and security lights, low power consumption and economical, high visibility to use the LED to maximize the lighting effect The trend is to use lighting devices.

The LED (Light Emitting Diode) is a light emitting diode (LED) that is developed using a property of generating a light emitting phenomenon when a voltage is applied to a compound semiconductor, and is a semiconductor light emitting device having a small size, a long life, and excellent efficiency compared to a conventional light source.

Since the LED has a high photoelectric conversion efficiency, the power consumption is very low as 5W, so there is little heat generation, and since the LED does not emit light due to thermal discharge, no extra time is required, and thus the lighting and extinguishing speed is fast.

In addition, since there is no gas or filament, it is strong against shock and safe, and adopts stable DC lighting method, which consumes less power, enables repeated and pulsed operation, reduces optic nerve fatigue, and has a long service life. have.

The LED lighting lamp using the LED module having such an advantage is an LED chip which is a light source for generating light, a lens or reflector for collecting light generated from the LED chip, a holder for fixing the lens or the reflector, and the LED chip And a heat sink for dissipating heat generated from the outside to the outside, and a converter for converting AC into DC.

However, the conventional LED lighting lamp structure as described above has a problem in that the light emitted through the lens or the reflector is reflected through the lens and squeezed out so that some light is lost and the light efficiency is lowered.

Moreover, the holder only serves to fix the lens or reflector, and there are no other additional functions.

Accordingly, an object of the present invention, which is conceived in view of the above problems, is made of a heat-resistant transparent resin and light diffuser material that can be transmitted to the side and front of the cap-shaped holder for fixing the lens or reflector through the lens The light efficiency is further enhanced by scattering and diffusing not only the light of the refractory LED chip but also the light that is reflected and bounced through the lens and lost to the side through the side and the front of the cap-shaped light diffusion holder. It is to provide an LED lighting lamp showing the illuminance and brightness.

LED lighting lamp according to the present invention for smoothly achieving the object of the present invention, the conical LED module accommodating the conical shape of the concave shape in the front and having an annular rim in the enlarged front outer An additional portion is formed in the rear of the cylindrical heat sink is formed of a cylindrical housing and a plurality of heat dissipation fins are formed on the outer periphery of the conical LED module accommodating portion, and is accommodated in the conical LED module accommodating portion to the outside according to the power supply to the front A disk-shaped LED module including a plurality of LED chips emitting light, and a plurality of conical lenses positioned in front of each of the LED chips to improve directivity by collecting light emitted from each LED chip of the LED module. LED consisting of a lens unit and a cap type light diffusion holder In the bright lamp, the cap-shaped light diffusion holder inwardly curved annular side wall of the image light substrait for scattering and diffusing the light refracted and reflected to the side of the lens portion and the front of the light passing through the lens portion It has a front smooth surface for improving directivity.

Here, an annular rim is formed on the rear upper side of the cap-shaped light diffusion holder, and an annular rim is formed to protrude from the bottom of the hollow heat sink, so that the annular rim of the cap-shaped light diffusion holder is annular to the bottom of the hollow heat sink. By being fixed to the rim, it is preferable that the cap type light diffusion holder is fixed while covering the LED module and the lens unit sequentially.
Also, it is housed in a cylindrical housing formed at the rear of the heat sink, and a power terminal terminal is formed at a rear end thereof to receive AC power from the outside, and convert the frequency of AC power into a high frequency of DC power to supply each LED chip. Switching mode power supply (SMPS), a cylindrical cap for covering the switching mode power supply (SMPS), and a terminal such that only a rear end of the power terminal terminal is exposed to the outside. The cap and the disk-shaped heat transfer pad are preferably provided in close contact with the rear side of the disk-shaped LED module in order to transfer the heat generated from the LED module to the hollow heat sink.

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As described above, according to the LED lighting lamp according to the present invention, the cap-shaped light diffusion holder for fixing the lens or the reflector has a completely unique shape having an inward curved annular sidewall of the light beam narrowing side and a front smooth surface. In this configuration, the light refracted and reflected to the side of the lens portion can be scattered and diffused effectively, and the front directivity is increased, and the front directivity of the light passing through the lens portion by the front smooth surface is further improved. The material is formed by incorporating a light diffuser into a heat-resistant transparent resin, which effectively alleviates glare and realizes gentle and comfortable lighting, and emits light to the front and side to enhance light efficiency. And luminance.

1 is a schematic exploded perspective view of an LED lighting lamp according to the present invention.
2A and 2B are combined cross-sectional views and a combined perspective view of the LED lighting lamp according to the present invention.
3 is a photographic view of the LED lighting lamp according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a schematic exploded perspective view of an LED lighting lamp according to the present invention, Figures 2a and 2b is a combined cross-sectional view and a combined perspective view of the LED lighting lamp according to the present invention, Figure 3 is a photograph of the LED lighting lamp according to the present invention As a figure, it demonstrates together for convenience.

As shown, the LED lighting lamp 100 according to the present invention, the power supply (SMPS; Switching Mode Power Supply) having a power terminal (1-1), and the power supply (1) It is supplied with power from the plurality of LED chips 21 is a disk-shaped LED module 20 in the form of a chip on board (COB) mounted on a circuit board, and a hollow shape in which the LED module 20 is accommodated A lens unit 30 including a heat sink 10 and a plurality of conical lenses 31 for collecting light from each of the LED chips 21 of the LED module 20 to improve directivity, and the LED module and the A cap-shaped light diffusion holder 40 is formed to cover and support the lens unit sequentially and simultaneously emit light emitted from the LED module to the side and the front thereof.

Here, the LED lighting lamp 100 according to the present invention, the cylindrical cap (2) for covering the Switching Mode Power Supply (SMPS) (1), and the upper end of the power terminal terminal (1-1) The terminal cap 3 to expose only the outside and the heat generated from the LED module 20 to be in close contact with the rear side of the disk-shaped LED module 20 in order to transfer to the hollow heat sink 10 Further provided is a disk-shaped heat transfer pad 4 which is fixed by a screw 51.

A power terminal terminal 1-1 is formed at one end of the switching mode power supply (SMPS) 1 to receive AC power from the outside, thereby changing the frequency of the AC power to a high frequency of the DC power. It is to implement a miniaturized / lightweight converting circuit compared to the existing transformer. Since the technology of the SMPS power supply 1 is a well-known technique, further description will be omitted.

In addition, the LED module 20 in the form of a Chip on Board (COB) is electrically connected to the other end of the Switching Mode Power Supply (SMPS) 1 to receive a stable power and at the same time, three The LED chip 21 is in the form of a chip on board (COB) mounted on a circuit board.

Here, the LED module 20 is provided with a control circuit to monitor the voltage supplied to the three LED chips 21, and to allow a constant current to be supplied to each LED chip 21.

In the illustrated example, three LED chips 21 are shown, but four or more LED chips 21 may be mounted.

Here, the LED chip 21 may use a white LED, but without using a relatively expensive and short-lived white LED, molding a transparent resin directly on a monochromatic LED chip or a phosphor for converting white light directly onto the surface thereof. Of course it can be used to apply.

In this case, when the monochromatic LED chip 21 is used, it may be any one of a plurality of blue LEDs, purple LEDs, or ultraviolet LEDs.

On the other hand, the phosphor for white light conversion is composed of a heat resistant transparent resin and a phosphor homogeneously dispersed and distributed therein.

In this case, when the monochromatic LED chip 21 is a blue LED chip, the phosphor may be a yellow phosphor alone or a mixture of yellow and red phosphors.

In addition, when using a purple LED chip or an ultraviolet LED chip as a monochromatic LED chip 21, it is necessary to radiate the wavelength of a blue band, and it is necessary to add a blue fluorescent substance.

The yellow phosphor is not particularly limited as long as it is excited at 250 to 450 nm and emits a wavelength in the range of 545 to 580 nm. The yellow phosphor is, for example, (YGd) ₃ Al ₅ O ₁₂ : Ce, (YGd) ₃ (AlGa) ₅ O ₁₂ : Ce, Sr ₂ Ga ₂ S ₅ : Eu ²⁺ , Sm ₃ Al ₅ O ₁₂ : Ce, Tb ₃ Al ₅ O ₁₂ : Ce, (Sr _1-xy Ba _x Ca _y ) ₂ SiO ₄ : Eu ²⁺ F (0≤x≤0.8, 0≤y≤0.8), (Y _1-r Smr, Gd _1-r Smr) ₃ (Al _1-s Ga _s ) ₅ O ₁₂ : Ce (0≤r <1 , 0≤s≤1), (Y _1-xyz Ce _x Tb _y Gd _z ) ₃ Al ₅ O ₁₂ (0.008≤x≤0.05, 0.005≤y≤0.06, 0.01≤z≤0.06, x + y + z < 0.21), (Sr _1-xy (Mg, Ca, Ba) _x ) ₂ SiO ₄ : Eu _y , (Sr _1-xy (Mg, Ca, Ba, Ra) _x ) ₂ SiO ₂ : Eu _y (0≤x <1, 0.001≤y≤0.3, Z is 1-5), Ca _0.75 Eu _0.25 Si _8.625 Al _3.375 O _1.125 N _14.87 , (Ca, Sr, Mg, Ln) SiAlN _w-δ O _δ : Ce ³⁺ (W = 3, 0 ≦ δ <3) and (Mn, Ce, Eu, Gd, Tb, Yb, Lu) La ₃ Si ₈ N ₁₁ O ₄ .

On the other hand, in terms of high brightness, (YGd) ₃ Al ₅ O ₁₂ : Ce, (YGd) ₃ (AlGa) ₅ O ₁₂ : Ce, Sm ₃ Al ₅ O ₁₂ : Ce, Tb ₃ Al ₅ O ₁₂ : Ce, (Al _1-s Ga _s ) ₅ O ₁₂ : Ce (0≤r <1, 0≤s≤1), (Y _1-xyz Ce _x Tb _y Gd _z ) ₃ Al ₅ O ₁₂ (0.008≤x≤0.05, 0.005 It may also be desirable to use aluminate-based phosphors such as? Y? 0.06 and 0.01? Z?

In addition, the red phosphor is not particularly limited as long as it is excited at 250 to 450 nm and emits a wavelength in the range of 630 to 700 nm. For example, Y ₂ O ₂ S: Eu, Gd, Li ₂ TiO ₃ : Mn, LiAlO ₂ : Mn, 6MgO · As ₂ O ₅ : Mn ⁴⁺ , 3.5MgO.0.5MgF ₂ ㆍ GeO ₂ : Mn ⁴⁺ , Ba _1.746 Ca _2.134 Si ₆ N _10.08 O _0.92 : Eu _0.04 , Ce _0.08 Sr ₃ SiO ₅ : Eu, CaS: Eu, Sr _x Ba _y Ca _1-xy AlSiN ₃ : Eu (0 ≦ x + y ≦ 1, 0 ≦ x, y ≦ 1), Sr _x Ba _y Ca _2-xy S: Eu (0 ≦ x + y ≦ 2), Y (Ba, Sr, Ca) _1-x Eu _xa Si _b O _c N _d (0 <x <1, 1.8 <a <2.2, 4.5 <b <5.5, 0≤c <8, 0 <d ≤ 8 and 0 <c + d ≤ 8).

In addition, the above-mentioned green phosphor is not particularly limited as long as it is excited at 250-450 nm and emits a wavelength in the range of 500-540 nm. For example, ZnS: Cu, Al, Ca ₂ MgSi ₂ O ₇ : Cl, Y ₃ (Ga _{x Al 1-x) 5 O 12} : Ce (0 <x <1), La 2 O 3 and _{11Al 2 O 3: Mn, Ca} 8 Mg (SiO 4) 4 C l2: Eu, Mn, Sr 2 SiO 4: _{Eu, Ba 2 SiO 4: Eu} , Ca 2 SiO 4: Eu, SrGa 2 S 4: Eu, BaGa 2 S 4: Eu, CaGa 2 S 4: Eu, Sr 2 Ga 2 S 5: Eu, SrAl 2 S 4 : Eu, BaAl ₂ S ₄ : Eu, Sr ₂ Al ₂ S ₅ : Eu, Ba ₂ MgSi ₂ O ₇ : Eu, Ba ₂ ZnSi ₂ O ₇ : Eu, BaAl ₂ O ₄ : Eu, SrAl ₂ O ₄ : Eu , BaMgAl ₁₀ O ₁₇ : Eu, Mn ²⁺ , and BaMg ₂ Al ₁₆ O ₂₇ : Eu, Mn ²⁺ , (Ca, Sr, Mg, Ln) SiAlN ₂ O: Ce ³⁺ , Eu _0.0029 Si _0.40427 Al _0.0121 O _0.02679 N _0.5539 can be mentioned.

In addition, in the present invention, when the purple LED chip or the ultraviolet LED chip is used as the monochromatic LED chip 21, the blue phosphor to be added is not particularly limited as long as it is excited at 250 to 450 nm and emits a wavelength in the range of 420 to 480 nm. For example, Sr ₃ MgSi ₂ O ₈ : Eu, Ba ₃ MgSi ₂ O ₈ : Eu, SrS: Ce, CaS: Ce, CaAl ₂ S ₄ : Eu, (Sr, Ba, Ca) ₅ (PO ₄ ) ₃ Cl: Eu, BaMg ₂ Al ₁₆ O ₂₇ : Eu, Sr ₄ Al ₁₄ O ₂₅ : Eu, BaAl ₈ O 1 ₃ : Eu, (Sr, Mg, Ca, Ba) ₅ (PO ₄ ) ₃ Cl: Eu, BaMgAl ₁₀ O ₁₇ : Eu, Sr ₂ Si ₃ O ₈₂ SrCl ₂ : Eu and Ce _0.000951 Si _0.40894 Al _0.021715 O _0.0014265 N _0.566968 .

The hollow heat sink 10 is formed of a metal material having good heat dissipation characteristics such as aluminum, and covers and accommodates a switching mode power supply (SMPS) 1 at a rear side (upward in the drawing). And a cylindrical housing 11 for engaging through a cylindrical cap 2, a fixing screw 50, and a screw coupling groove (not shown in the drawing), and expanded in front (downward in the drawing). It consists of a conical LED module receiver 12 having a conical opening and an annular rim 13 at the extended front shell.

Here, a plurality of heat dissipation fins 14 are installed in the shape of a fan in the longitudinal direction at the outer circumference of the conical LED module accommodating part 12 so that heat generated from each of the LED modules 20 may be disc-shaped heat transfer pads. Via (4), it can be discharged | emitted to the outside through the some fan-shaped heat sink 14.

Of course, the terminal cap 3 is coupled to the upper end of the cylindrical cap 2 to be fitted to the rear of the cylindrical housing 11 of the heat sink 10 through a forced press or screw fastening method, so that the power supply terminal terminal 1 Only the upper end of -1) is exposed outside to supply power.

On the other hand, the lens unit 30 is a plurality of symmetrically installed in the front of the disk-shaped base portion 32 and the rear of the disk-shaped base portion 32 (upward in the figure), the illustrated example Is composed of three conical lenses 31, the LED chip 21 formed in front of the LED module 20 is inserted into the opening in the top of each of the conical lens 31, the light of each LED chip 21 Is collected through the conical lens 31 to improve directivity.

In addition, instead of the lens unit 30, the reflector having a known reflector may be provided to collect light to improve directivity.

Here, three fixed support bases 33 are installed at the rear side of the disc-shaped base part 32 so that the lens unit 20 and the LED module 20 can be coupled to each other while maintaining a space therebetween.

On the other hand, the cap-shaped light diffusion holder 40, which is a feature of the present invention, is a bowl-shaped cap shape having an inward curved annular sidewall of an ordinary light narrowing side and a front smooth surface. The rear side (upper side in the drawing) is fitted and fixedly coupled to the annular rim 13 formed on the bottom surface of the hollow heat sink 10, so that the LED module 20 and the lens unit 30 are sequentially turned forward and sideward. By covering, not only the light refracted from the lens unit 30 but also the light of the side reflected and bounced out is further diffused by the scattering action so as to emit both the side and the front.

That is, a plurality of annular rims 41 are formed on the rear side (upper end) of the cap-shaped light diffusion holder 40 to correspond to the annular rims 13 of the hollow heat sink 10. The insertion module and the insertion groove (not shown in the drawing) are inserted into and coupled to each other, so that the LED module 20 and the lens unit in the space portion of the cap-shaped light diffusion holder 40 on the front side thereof. Since the cap type light diffusion holder 40 itself, in which the side and the front are light-transmitted by the thermally transparent resin, includes a light diffuser material, while the 30 is sequentially covered and closely supported. It is possible to further improve the light efficiency by sending the light refracted and reflected from the unit 30 to the outside through both front and side by the scattering action without loss.

The cap light diffusion holder 40 may be formed by double injection molding, and may be formed by any known method such as pouring, spin coating, spray coating, UV coating, or the like. Can be formed, and the method of formation thereof is optional in the present invention.

The cap type light diffusion holder 40 which is transmitted through the side and the front is composed of a heat resistant transparent resin and a light diffuser homogeneously dispersed therein.

The heat resistant transparent resin may be a silicone resin, a polymethyl pentene resin, a polyether sulfon resin, a polyether imide resin, a polyarylate resin, and polymethyl At least one resin selected from the group consisting of methacrylate (polymethyl methacylate) resins, or at least one UV curable type selected from the group consisting of urethane acrylates, epoxy acrylates, polyester acrylates, and acrylic acrylates It is preferable that it is resin.

In addition, examples of the light diffuser include a silicone resin (refractive index 1.43), polyacrylate (polyacrylate: 1.49), polyurethane (refractive index 1.51), polyethylene (refractive index 1.54), polypropylene : Homopolymers such as refractive index 1.46), nylon (Nylon: 1.54), polystyrene (1.59), polymethylmethacrylate (1.49), polycarbonate (polycarbonate: 1.59), and monomers thereof Organic light diffusing agents such as copolymers; Silica (refractive index 1.47), alumina (refractive index 1.50 to 1.56), glass (glass: refractive index 1.51), calcium carbonate (CaCO3: refractive index 1.51), talc (talc: refractive index 1.56), mica (mica: 1.56) Inorganic light diffusing agents such as barium sulfate (BaSO 4: refractive index 1.63), zinc oxide (ZnO: refractive index 2.03), cesium oxide (CeO 2: refractive index 2.15), titanium dioxide (TiO 2: refractive index 2.50 to 2.71), iron oxide (2.90), Or any mixture thereof.

When the light diffuser is added, an average particle diameter of 0.2 to 30 μm, preferably 0.5 to 5 μm, and specifically 1.0 to 3.5 μm is used, and the amount of the light diffuser is the total weight of the cap light diffusion holder. 0.01 to 10.0% by weight, preferably 0.1 to 5.0% by weight.

If the average particle diameter of the light diffuser is less than 0.2 µm, transparency and light transmittance may be inferior, which is not preferable. Conversely, if it exceeds 10.0% by weight, transparency and light transmittance may be inferior, which is not preferable.

When the light diffusing body having the average particle diameter of 0.2 to 30 µm, preferably 0.5 to 5 µm, and specifically 1.0 to 3.5 µm is added in an amount of 0.01 to 10% by weight, preferably 0.1 to 5% by weight, heat-resistant transparent The content of the matrix resin is reduced to control the amount added.

Although the present invention has been described in detail with reference to various embodiments, it is not intended to limit the present invention only to illustrate the present invention, and various changes and modifications can be made by those skilled in the art without departing from the gist and scope of the present invention. Of course, this is also within the scope of the present invention.

100: LED lighting lamp according to the present invention
1: Switching Mode Power Supply (SMPS)
1-1: Power Terminal Terminal 2: Cylindrical Cap
3: terminal cap 4: disk-shaped heat transfer pad
10: hollow heat sink 11: cylindrical housing
12: Conical LED module receptacle 13: Annular rim
14: a plurality of heat radiation fins 20: disk-shaped LED module
21: LED chip 30: lens unit
31: a plurality of conical lens 32: disk-shaped base portion
33: three fixed support base 40: cap type light diffusion holder
41: annular rim 50, 51: set screw

Claims (5)

A conical LED module accommodating part is opened in an extended conical shape and an annular rim is formed in the extended front outer part, and a cylindrical housing is formed in the rear and an outer periphery of the conical LED module accommodating part. A disk-shaped LED module comprising a hollow heat sink having a plurality of heat dissipation fins formed therein, a plurality of LED chips accommodated in the conical LED module accommodating portion and emitting light to the outside according to a power supply toward the front, and the LED In order to improve directivity by collecting light emitted from each LED chip of the module, a lens unit comprising a plurality of conical lenses positioned in front of each LED chip, and an LED lighting lamp comprising a cap type light diffusion holder. In
The cap-shaped light diffusion holder is for improving the forward directivity of the light passing through the lens portion and the inward curved annular side wall of the image light narrowing channel for scattering and diffusing the light refracted and reflected to the side of the lens portion. Characterized by having an anterior smooth surface
LED lighting lamps. An annular rim is formed on the rear upper side of the cap-shaped light diffusion holder, and an annular rim is formed on the bottom of the hollow heat sink, so that the annular rim of the cap-shaped light diffusion holder is the heat of the hollow shape. The LED lighting lamp is characterized in that the cap-shaped light diffusion holder is fixed while covering the LED module and the lens unit sequentially by being fixed to the annular rim of the sink bottom. According to claim 1, It is accommodated in a cylindrical housing formed at the rear of the heat sink, the rear end is formed with a power terminal terminal is supplied with AC power from the outside, by converting the frequency of the AC power source to a high frequency of the DC power source Switching Mode Power Supply (SMPS) for supplying each LED chip, a cylindrical cap for covering the Switching Mode Power Supply (SMPS), and only the rear end of the power terminal terminal Terminal caps for external exposure and a disk-shaped heat transfer pad that is in close contact with the rear side of the disk-shaped LED module in order to transfer the heat generated from the LED module to the hollow heat sink is fixed through a fixing screw is provided LED lighting lamp, characterized in that.

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