KR20080040086A - Lighting equipment using high brightness LED - Google Patents

Abstract

The present invention relates to a luminaire using an LED, and more particularly, to arrange a plurality of high-brightness LEDs in a matrix connected in series and in parallel, to configure a dedicated drive circuit for driving the LEDs, Using a highly transparent optical acrylic injection lens, the light diffused from each LED is focused at a distance away from the lens, and the light passing through the focus diffuses back from the focus to the lens to the focus. The present invention relates to a luminaire using a high brightness LED configured to show sufficient illuminance and light distribution characteristics in a lighting space farther than the distance of.

In the lighting device using a high brightness LED according to the present invention, in a lighting device using a plurality of LEDs arranged on a printed circuit board (PCB) provided with a dedicated drive circuit, and a lens provided in front of the LED,

The lens is a lens installed corresponding to the position (a) at a certain distance away from each LED to collect light diffused in each LED to form a focal point corresponding to each LED at a position (b) away from the lens. The light passing through the focus diffuses again from the focus and brightly illuminates the illumination space A farther than the distance from the lens to the focus.

The luminaire using the high brightness LED according to the present invention is configured to focus the light using a lens corresponding to each LED to make a focus and then diffuse back into the lighting space to minimize the attenuation of the LED light to provide sufficient illumination and The light distribution characteristic can be maintained.

Description

ILLUMINATOR USING HIGH OUTPUT LED WITH HIGH BRIGHTNESS}

1 is an explanatory diagram showing the illuminance and light distribution characteristics in a luminaire using a conventional LED,

2 is an explanatory diagram showing a function of a condenser lens used for a lighting fixture using a high brightness LED according to the present invention;

3 is a cross-sectional view showing an example of a light fixture using a high brightness LED according to the present invention,

4 is a circuit diagram showing an example of an LED driving circuit according to the present invention;

5 is a circuit diagram showing an example of the LED connection according to the invention,

6 is an explanatory diagram showing the illuminance and light distribution characteristics of a lighting fixture using a high brightness LED according to the present invention;

7 to 9 are cross-sectional views showing an embodiment of a lighting fixture using a high brightness LED according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

1 power supply 2 light emitting unit

3: full wave rectifier 10: LED (LED)

20: printed circuit board (PCB) 30: heat sink

40: support plate 50: lens plate

51 lens 60 lens adjustment member

70, 71: reflector 80: luminaire cover

100: lighting fixture of the present invention

The present invention relates to a luminaire using an LED, and more particularly, to arrange a plurality of high-brightness LEDs in a matrix connected in series and in parallel, to configure a dedicated drive circuit for driving the LEDs, Using a highly transparent optical acrylic injection lens, the light diffused from each LED is focused at a distance away from the lens, and the light passing through the focus diffuses again and is smaller than the distance from the lens to the focal point. The present invention relates to a luminaire using a high brightness LED configured to show sufficient illuminance and light distribution characteristics in a farther illumination space.

In general, a lot of bulbs or fluorescent lights are used as indoor or outdoor lighting, such a bulb or fluorescent lamp has a short life and has to be replaced frequently. In addition, the conventional fluorescent lamp has a problem that excessively decreases the illuminance due to deterioration over the use time.

The use of LED as a luminaire to solve this problem is being developed. LEDs have excellent controllability, fast response speed, high electro-optical conversion efficiency, long life, low power consumption and high brightness.

1 is a schematic explanatory diagram showing illuminance and light distribution characteristics in a luminaire using a conventional LED. As shown, the LED lighting fixtures 200 installed on the ceiling of the underground parking lot, because the light emitted from each LED 10 is directly diffused from the LED and radiated to the lighting space, the light attenuation occurs on the diffusion path to the extent of the car In the illumination space of the height (A) there is a problem that the illumination is not sufficiently secured.

In other words, LED has many advantages such as high electro-optical conversion efficiency, long life, low power consumption and high brightness, but LED output is weak, so if the light diffusion distance is long, satisfactory illuminance can be obtained in the desired lighting space. There was no problem. Recently, in order to solve this problem, a luminaire using high power LED has been developed. The luminaire using such a high power LED can satisfy the illuminance in the lighting space, but since heat is generated from the LED, the heat dissipation fin is used. Since a complicated heat dissipation device including a blower fan is required separately, the product price is increased and the electric efficiency is low, which makes it difficult to be practical.

The present invention is to solve the above problems, the main object of the present invention is to focus on each LED so that the light after the focus is diffused back to the lighting space after forming a focus by concentrating the light emitted from each LED By installing a lens to minimize the attenuation of light according to the diffusion distance to provide a luminaire using an LED that can obtain a satisfactory illuminance in the desired lighting space without using a high-power LED.

Another object of the present invention, by installing a lens in front of the LED, by installing a lens adjusting member for adjusting the distance between the LED and the lens to adjust the focal length of the light by the lens to secure the illumination and light distribution characteristics at a desired distance It is to provide a luminaire using an LED that can be improved.

A first aspect of the luminaire using the high brightness LED according to the present invention in order to achieve the above object is to use a high transparency optical acrylic injection lens to position the light emitted from each LED at a distance away from the lens In addition to forming a focal point, the light passing through the focal point diffuses again from the focal point to have sufficient illuminance even in an illumination space located farther than the distance from the lens to the focal point.

The second aspect of the luminaire using the high brightness LED according to the present invention is to install a high transparency optical acrylic injection lens, and arbitrarily adjust the light source distance between the lens and the LED to expand or reduce the distribution angle The illuminance and light distribution characteristics desired at the distance are indicated.

As a preferable means for this, the lighting device using a high brightness LED according to the present invention, a lighting device using a plurality of LEDs arranged on a printed circuit board (PCB) provided with a dedicated drive circuit, and a lens provided in front of the LEDs In the lens, the lens is installed corresponding to the position (a) a certain distance away from each LED to collect the light diffused in each LED to form a focal point corresponding to each LED at a position (b) away from the lens The light passing through the focus diffuses again from the focus and brightly illuminates an illumination space farther than the distance from the lens to the focus.

In the present invention, the lens is installed to correspond to a plurality of LEDs in a 1: 1, it is characterized in that the optical acrylic injection lens of high transparency. The lens may be a lens plate in which a plurality of lenses corresponding to the LEDs 1: 1 are integrally formed on one flat plate.

In the present invention, the lens is characterized in that it has a semi-circular cross section. At this time, the flat surface of the lens to face the LED.

The distance to the focal point where the light passing through the lens is focused is adjusted according to the distance between the LED and the lens.

And, between the support plate and the lens or lens plate for holding and supporting the printed circuit board, by adjusting the distance between the LED and the lens plate, a lens adjusting member for adjusting the focal length generated through the lens is installed do.

Another embodiment of the present invention, in the LED lighting apparatus using a plurality of LEDs arranged on a printed circuit board (PCB) provided with a dedicated drive circuit, and a plurality of lenses provided in front of the LED, the LED front A lens plate having a plurality of lenses integrally positioned to correspond 1: 1 to each other to collect light generated from each LED; A heat sink that is closely coupled to the printed circuit board and dissipates heat generated from the LED; A lens adjusting member positioned between the support plate and the lens plate to adjust a distance between the LED and the lens plate to adjust a focal length generated through the lens; and installed at the front of the lens plate to protect the LED and the lens. It characterized in that it comprises a luminaire cover.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of a luminaire using a high brightness LED according to the present invention in detail.

First, FIG. 2 is an explanatory diagram showing an example of a lens applied to a luminaire using a high brightness LED according to the present invention.

In general, the convex lens has a focal point f determined by 1 / f = (N-1) (1 / R). Here, N is the refractive index according to the material of the lens, R is the radius of curvature of the lens.

Therefore, when the focal length f of the lens is determined according to the material and shape of the lens, the distance between the light source emitting the light and the lens, that is, the light source distance, is determined by the lens formula 1 / a + 1 / b = 1 / f. The distance between (a) and the lens and the focal point, that is, the focusing distance b, is determined.

On the other hand, as shown, in the case of a convex lens having a semi-circular cross section according to the present invention, if the light source distance (a) and the focal length (f) is the same, the light does not collect, there is a characteristic that goes straight. When the light source distance a is larger than the focal length f, light is collected by forming a focal point at the condensing distance b. On the other hand, when the light source distance a is smaller than the focal length f, the light does not converge to the focal point and diffuses as it is.

3 is a cross-sectional view showing a preferred embodiment of a luminaire using a high brightness LED according to the present invention.

As shown in the figure, the luminaire 100 using the high brightness LED according to the present invention includes a printed circuit board (PCB) 20 provided with a dedicated LED drive circuit and a plurality of LEDs arranged on the printed circuit board 20. 10 and a plurality of lenses 51 installed corresponding to the respective LEDs 10 in front of the LEDs. The rear surface of the PCB 20 is provided with a heat sink 30 for radiating heat generated by the LED 10, the front of the lens 51 is provided with a luminaire cover (80).

As shown in FIG. 3, a lens 51 is provided to correspond to each LED 10 in a 1: 1 distance from the LED 10. In this case, the lens 51 is an acrylic lens formed by injection molding acrylic having high transparency, and is a convex lens having a semicircular cross section, and the flat surface faces the LED 10 and the convex surface faces the focal point. . At this time, the lens 51 is installed so that the light source distance (a) is larger than the focal length (f) so that the light diffused from each LED 10 can be collected at a constant focusing distance (b).

In addition, as shown, the plurality of lenses 51 described above are preferably integrally combined with a predetermined flat plate 52 to form one lens plate 50. The lens plate 50 is also preferably an acrylic lens plate made by injection molding acrylic having high transparency. In addition, the lens and the lens plate can also be made of other materials such as glass or quartz.

Meanwhile, FIG. 4 is a circuit diagram showing an example of an LED driving circuit and FIG. 5 is a circuit diagram showing an LED connection according to the present invention. As shown in the figure, the LED driving circuit used in the present invention is designed to be used in a DC power source or an AC power source used in a general home or building. The resistor R and the capacitor C located in front of the full-wave rectifying part 3 serve to limit the magnitude of the maximum value of the current flowing through the light emitting part 2 at the rear end. In addition, the capacitor C1 located at the rear end of the full-wave rectifying unit 3 serves to smooth the rectified voltage to a stable DC voltage to remove the ripple component of the overvoltage.

And, Figure 5 is a connection diagram showing a preferred embodiment for connecting the LED of the luminaire using the high brightness LED according to the present invention. As illustrated, the plurality of LEDs 51 positioned in the light emitting part 2 of FIG. 3 are arranged in a matrix structure, and are connected to have the same direction in all rows and columns. That is, a plurality of LEDs are connected in series to form a plurality of LED strings 6, and a connection line 7 is connected between each of the LED strings 6 to be parallel to each LED 51 so that some LEDs fail. Even if it occurs, the entire LED string is allowed to emit light.

Figure 6 is a schematic explanatory diagram showing the illuminance and light distribution characteristics of the lighting fixture using a high brightness LED according to the present invention.

As shown in the figure, a luminaire 100 using a high brightness LED according to the present invention is installed in an underground parking lot or an underground cavity. In the case of underground parking lots or underground common areas, the height to the ceiling is often more than 2 to 3m, but the lighting space that needs sufficient illuminance is the portion corresponding to the height (A) or less of the vehicle. In other words, the part except the illumination space may be relatively low illuminance.

As described above, the luminaire 100 using the high brightness LED according to the present invention by installing the lens 51 in front of the LED 10, the light generated and diffused from the LED 10 passes through the lens 51 Condensing at a point on the condensing distance (b) is to ensure the required illuminance in the lighting space. In this case, the light source distance a must be larger than the focal length f of the lens 51 so that the focal point is formed at the condensing distance b.

As described above, the luminaire 100 using the high brightness LED according to the present invention has an effect of securing required illuminance even at a relatively long distance by providing a lens forming a focal point in front of the lens 10.

That is, as shown in Figure 1, the lighting fixture 200 using a conventional LED is configured to brighten the illumination space of a relatively long distance using the light diffused from the LED 10, from the LED (10) The diffuse light attenuates while passing through the air, and thus does not maintain sufficient illuminance in the actual lighting space.

However, the luminaire 100 using the high-brightness LED according to the present invention, since the light diffused from the LED 10 passes through the lens 10 and condenses at one point at a condensing distance b, from the lens 10 to the focus point. Almost no attenuation occurs while passing through the distance a + b. The light passing through the focal point is naturally diffused from each focal point, radiated into the illumination space, and collides with the air particles to be dispersed. Therefore, the luminaire 100 using the high brightness LED according to the present invention can exhibit a higher illuminance in the lighting space even when using the LED 10 having the same output as in the prior art.

 In addition, the luminaire 100 using the high brightness LED according to the present invention, by adjusting the light source distance (a) between the LED and the lens, it is possible to secure the desired illuminance at the desired distance by changing the light collecting distance (b). For example, if the light source distance a is adjusted, the light distribution angle at which light is diffused is changed to illuminate a desired area. In the case of using a high power LED, the light distribution distance can be increased by making the light source distance a smaller than the focal length f of the lens 51 so that the lens acts as a diffusion lens.

Hereinafter, another embodiment of a luminaire using a high brightness LED according to the present invention will be described in detail with reference to the accompanying drawings.

First, Figure 7 shows an embodiment of the configuration of the luminaire 100 using a high brightness LED according to the present invention, relative to the LED 10 of the lens 51 in the luminaire 100 of FIG. It is configured to further include a lens adjustment member 60 to adjust the illuminance and light distribution angle in the illumination space by adjusting the distance.

The lens adjusting member 60 is fixed perpendicularly to the support plate 40 and passes through a through hole formed in the lens plate 50, and a fixing bolt 60 penetrating through the lens plate 50. It is made of a nut 61 is fastened to the fixed to the lens plate. Therefore, the distance between the lens plate 50 and the LED 10 changes according to the rotational speed of the nut 61.

Subsequently, FIG. 8A shows another embodiment of the configuration of the lighting device 100 using the high brightness LED according to the present invention. In the above-described lighting device 100, the reflector is disposed between the LED 10 and the PCB 20. (70) was installed more. At this time, the reflector 70 is made of stainless steel with excellent light reflectance, and both ends are bent at an angle inclined forward so that the reflected light can be collected in the center. The reflection plate 70 reflects the light emitted from the LED 10 to the front to increase the illuminance in the illumination space.

8B is a cross-sectional view showing another embodiment of the reflecting plate according to the present invention, and as shown, a conical reflecting plate 71 for guiding light emitted from each LED 10 to the lens 51. . The conical reflective plate 71 is formed by bending a high gloss metal plate or by injection molding plastic and plating a reflective surface on the inner surface thereof.

And, Figure 9 shows another embodiment of the luminaire 100 using a high brightness LED according to the present invention, and the printed circuit board 20, the LED 10 is arranged to improve the light distribution angle of the illumination The reflective plate 70 is bent or cut in a radial shape to process a plurality of bent surfaces 21 to form a wider illumination space. At this time, the high brightness LED 10 is installed on each bent surface (21).

The cut surface 21 is attached to the upper surface of the separate heat dissipation sheet 41 at a predetermined interval. The heat dissipation sheet 41 is made of a material having excellent thermal conductivity, and its bottom surface is in close contact with the heat dissipation plate 30.

As described above, the present invention forms a focus at a position away from the lens by diffusing light from each LED, and the light passing through the focus is diffused again from the focus, even in a relatively distant illumination space. It is configured to show sufficient illuminance and light distribution characteristics.

However, the scope of the present invention is not limited to the above-described embodiments and the accompanying drawings, and those skilled in the art may have various substitutions, modifications, and changes within the scope without departing from the technical spirit of the present invention. Therefore, the scope of the present invention should be interpreted according to the matters described in the claims to be described later.

As described above, the luminaire using the high brightness LED according to the present invention has the effect of securing the required illuminance even at a longer distance by condensing light using a lens to make a focus and then diffusing it from the focus.

In addition, the luminaire using the high brightness LED according to the present invention, by adjusting the light source distance of the LED and the lens has an effect that can be adjusted so that the desired illuminance and light distribution characteristics appear at a desired distance by expanding or reducing the light distribution angle.

Claims (11)

In the lighting device using a plurality of LEDs arranged on a printed circuit board (PCB) provided with a dedicated drive circuit and a lens provided in front of the LED, The lens is a lens installed corresponding to the position (a) at a certain distance away from each LED to collect light diffused in each LED to form a focal point corresponding to each LED at a position (b) away from the lens. And the light passing through the focus diffuses again from the focus and illuminates an illumination space farther than the distance from the lens to the focus. The method of claim 1, The lens is a luminaire using a high brightness LED, characterized in that installed so as to correspond to a plurality of LEDs 1: 1. The method of claim 1, The lens is a luminaire using a high brightness LED, characterized in that the lens plate integrally formed in a single flat plate. The method according to any one of claims 1 to 3, The lens is a luminaire using a high brightness LED, characterized in that having a semi-circular cross section. The method of claim 1, The focusing distance (b) to the focal point where the light passing through the lens is focused is adjusted according to the light source distance (a) between the LED and the lens. In the lighting device using a plurality of LEDs arranged on a printed circuit board (PCB) provided with a dedicated drive circuit and a plurality of lenses provided in front of the LED, A lens plate in which the plurality of lenses are integrally formed on one flat plate; And a lens adjusting member positioned between the support plate and the lens plate to fix and support the printed circuit board to adjust a distance between the LED and the lens plate to adjust a condensing distance generated through the lens. Lighting equipment using high brightness LED. The method of claim 6, The lens adjusting member includes a fixing bolt vertically fixed to a support plate for fixing and supporting the printed circuit board and penetrating a through hole formed in the lens plate, and a nut fastened to the tip of the fixing bolt to fix the lens plate. Lighting equipment using high brightness LED, characterized in that. In the lighting device using a plurality of LEDs arranged on a printed circuit board (PCB) provided with a dedicated drive circuit and a plurality of lenses provided in front of the LED, A lens plate which is disposed to correspond to the front of the LED in a one-to-one manner, and has a plurality of lenses integrally formed on one flat plate to collect light generated from each LED; A heat sink that is closely coupled to the printed circuit board and dissipates heat generated from the LED; A lens adjusting member fixed to the heat sink and positioned between the support plate and the lens plate to adjust a distance between the LED and the lens plate; And It is installed in front of the lens plate and the luminaire cover to protect the LED and the lens; lighting fixture using a high brightness LED, characterized in that it comprises a. The method of claim 8, The luminaire using a high brightness LED, characterized in that it further comprises a reflecting plate installed on the upper surface of the printed circuit board to reflect the light emitted from the LED. The method of claim 8, The luminaire using a high brightness LED, characterized in that it further comprises a conical reflector located between each of the LED and the lens to prevent the light emitted from each LED to escape to the outside of the lens. The method of claim 8, The printed circuit board on which the LEDs are arranged has a bent surface bent to have a radial shape to increase the light distribution angle.

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