KR20100010524A - An illuminator applied light source of directly under form having light reflection means - Google Patents

Abstract

PURPOSE: A light device is provided to improve cooling efficiency by discharging the heat from an LED(Light Emitting Diode) to an outlet of the heat radiation case. CONSTITUTION: An LED source(10) includes an LED and an aspherical lens. The aspherical lens diffuses and discharges the light from the LED with an angle above 180 degrees. A reflection unit(40) is coupled with the LED source and includes a reflection surface(41), a penetration hole, and a reflection protrusion(43). The aspherical lens passes through the penetration hole. The reflection protrusion is formed between the penetration holes and reflects the light outputted through the aspherical lens to a light transmissive cover(P).

Description

Lighting equipment with surface light source of direct light type with light reflection means {AN ILLUMINATOR APPLIED LIGHT SOURCE OF DIRECTLY UNDER FORM HAVING LIGHT REFLECTION MEANS}

The present invention relates to a luminaire to which a surface light source of a direct light source type having light reflecting means is applied.

In detail, the present invention implements an LED light source having a light emission angle of at least 180 ° to emit light of uniformly high brightness over the entire area section in a configuration in which fewer LEDs are installed. The direct light source with the light reflecting means to improve the irradiation efficiency of the indoor lighting with lower economic burden by implementing the direct light type surface light source lighting by suggesting the configuration to reflect the light of the angle section of more than 180 ° It relates to a luminaire to which a surface light source of the type is applied.

 In addition, the present invention proposes a luminaire to which the surface light source of the direct light source type is applied having a light reflecting means to configure the cooling structure to guide the heat generated from the light source to the outside to enable more stable use of the luminaire do.

At the same time, the present invention is configured such that the LED light source can be driven by an alternating current by controlling the number of LEDs and a simplified rectification circuit, rather than through a dedicated circuit configuration such as SMPS, reducing the production cost and product size by a simplified rectification configuration The present invention provides a luminaire to which a surface light source of a direct light source type having a light reflecting means can be miniaturized and manufactured.

Lighting fixtures for implementing the main lighting in the room has a variety of forms. In particular, the light produced by a fluorescent lamp or a halogen lamp is exposed to the outside by the fluorescent lamp or the halogen lamp itself to illuminate the room by the light irradiated from the fluorescent lamp or the halogen lamp, or the front of the light emitted by the fluorescent lamp or the halogen lamp. The cover is arranged to allow the user to illuminate the room with the desired color or brightness of the light.

However, in the case of the fluorescent lamp or halogen as described above, the amount of power consumed is large, and it is difficult to satisfy the demands of various lighting colors of the consumer, and the lighting fixture itself is largely enlarged due to the size of the fluorescent lamp or halogen lamp. Significant inconvenience is caused to be implemented in the interior lighting.

Therefore, conventionally, the luminaire which uses the said fluorescent lamp or the halogen lamp as a light source is replaced by the structure of the form which uses LED as a light source. That is, such an LED light source consumes less power and can produce various colors of illumination.

For example, various colors of the LEDs can be configured to produce the desired color of light, as well as R (Red), G (Green), B (Blue) color combination group according to the user's needs It is possible to configure such that the brightness of the light, the color, etc. can be converted according to the surrounding environment factors such as the lighting output, the specific sound, the movement of the object, etc. that the real-time color is converted.

In addition, the luminaire by the LED light source as described above can produce a small luminaire due to the size of the LED.

Therefore, the luminaire using the LED light source is in the spotlight as a next-generation lighting that is applied to interior lighting or various products in the room.

On the other hand, when the LED is applied as a light source as described above, the power supplied to the LED must be supplied with a DC power. Therefore, a power supply device called a switching mode power supply (SMPS) is applied to the device employing the LED. The SMPS is to change the frequency of the AC power source to the high frequency of the DC power source to implement a miniaturized / lightweight converting circuit compared to a conventional transformer.

The lighting using the LED as the light source is mainly applied as a small light of the display device, or when applied to the room lighting is applied to the interior lighting that provides aesthetics of the room by emitting light only at a local point. However, such LED lighting is quite difficult to apply to the main lighting in the room.

In order to satisfy the amount of light for the LED lighting to be applied to the indoor main lighting, a large number of LEDs must be installed inside, and such a plurality of LED installations increase the unit cost of the product, thereby increasing the economic burden of the installation. Let's go. Particularly, since the LED light is a point light source, the light emitted from the central point of the LED is high in brightness, and the brightness of the LED light is slightly lower in the vicinity thereof, so that light having a somewhat uneven brightness is emitted for each section of the surface light source. Is generated.

In addition, such LEDs generate considerable heat due to device characteristics, and thus heat dissipation means are required. Here, since heat dissipation of LED elements is currently performed by heat dissipation due to heat conduction by contacting a substrate and a heat sink, heat is not sufficient to perform heat dissipation for a large number of LEDs corresponding to the amount of light of the main light as described above. The reality is that the sink itself is not enough.

In addition, the SMPS requires a large amount of current capacity as a result of converting an AC power source of 220V into a DC power source of 12 to 24V, which consumes a lot of power, and the high current capacity SMPS greatly increases the manufacturing cost of LED lighting. Increasingly, the application of the lighting is insignificant. In addition, since the SMPS module is manufactured in a considerably larger size than the LED lighting structure, which is generally made smaller than the SMPS module, the SMPS module has a limitation in miniaturization / light weight of the LED module.

The present invention has been invented to solve the above problems.

Therefore, the present invention, even if only a small number of LEDs can be installed to implement the LED lighting as the main lighting, it can have a considerable illuminance, it is possible to emit a light of uniform high brightness over the entire area, with a lower economic burden The first object is to provide a lighting fixture that can improve the irradiation efficiency of the indoor lighting.

The second object of the present invention is to propose a structure that can implement the illumination to form a surface light source of the direct method as the main lighting, by configuring a cooling structure to induce heat generated from the light source to the outside more The purpose is to provide a lighting fixture that can be used stably.

The third object of the present invention is to configure the LED light source to be driven by alternating current by controlling the number of LEDs and the simplified rectification circuit without the configuration of a dedicated circuit such as SMPS, reducing the production cost by the simplified rectification configuration, product of The present invention is to provide a luminaire capable of miniaturization.

In order to achieve the above object, the present invention has the following configuration.

In order to achieve the first object of the present invention, a plurality of LEDs are arranged in a plane in one direction, the light is emitted, the LED light emitted from each LED is integrated and diffused by passing through the light transmission cover to produce the illumination An apparatus comprising: an LED light source having an aspherical lens formed thereon to diffuse and emit light at an angle of more than 180 ° in front of the light from each of the LEDs; It includes a reflection unit for reflecting the light emitted by more than 180 ° angle by the aspherical lens to the light transmission cover side by forming a reflecting surface is inserted to the line of the boundary point of the LED and the aspherical lens of each LED light source.

At this time, the reflective unit is formed with a plurality of through holes for the aspherical lens of each LED light source to pass through, reflecting the projection to proceed to the light transmission cover side by reflecting an angle of less than 180 ° between the through holes formed; It is composed.

In particular, the aspherical lens is integrally formed with the LED so as to protrude from the tip of the LED, the light emitted from the LED (L) is reflected, diffracted, refracted through a diffusion inclination recessed inward from the tip at least 180 ° angle or more It is designed to be extended to a maximum angle of 250 °.

In order to achieve the second object of the present invention, the plurality of LED light source is electrically connected to the electrical and electronic elements for driving the LED is composed of a light source unit, the light in the direct light source method in front of the light emitted from the light source unit An illumination unit including the light transmission cover which receives the surface and emits light; A heat dissipation mechanism unit having one side coupled to the light source unit to receive heat generated from the light source unit, and a light transmission cover coupled to the other side to fix the position of the light transmission cover; A heat dissipation case provided on an outer side of the heat dissipation mechanism part to form an exterior, and having a heat dissipation mechanism part and an inner surface at regular intervals, and including a heat exchange passage through which external air passes between the heat dissipation mechanism part and the inner surface to perform heat exchange; It is configured to include.

In order to achieve the third object, the present invention includes: a bridge diode rectifying circuit unit for converting the light source unit into an electric power source for driving an LED by receiving an AC power source that is a driving source of the device; In order to emit light by the power inputted through the bridge diode rectifier circuit portion, a specific number of LEDs are connected in series, the LED driver for receiving the desired voltage through the voltage drop of the input power to emit light.

As described above, the present invention, by applying the aspheric lens and the light reflection configuration of the light emission angle of 180 ° or more, it is possible to apply the LED light as the main lighting even with a small number of LED installation, uniform across the entire area Since it is possible to emit a high brightness light, it is possible to improve the irradiation efficiency of the indoor lighting with a product of a lower production cost.

In addition, the present invention has an effect of improving the satisfaction of using the luminaire more stably by configuring a cooling structure to induce heat generated from the light source of the LED light to the outside.

In addition, the present invention is configured to enable the LED light source to be driven by alternating current by a simplified rectification circuit and the number of LEDs, it is possible to achieve the effect of reducing the manufacturing cost of the lighting and the miniaturization of the product to which it is applied.

1 is a perspective view of a luminaire according to the present invention, Figure 2 is a cross-sectional view of the luminaire according to the present invention. In addition, Figure 3 is a perspective view of the LED light source of the luminaire according to the present invention, Figure 4 is a cross-sectional view of the LED light source of the luminaire according to the present invention, Figure 5 is a graph of the light emission area of the LED light source of the luminaire according to the present invention. 6 is an enlarged cross-sectional view of a reflector of the lighting apparatus according to the present invention.

Referring to the drawings, the luminaire according to the present invention proposes a configuration for implementing the LED lighting as the main lighting, the inside and outside of the room. To this end, the LED lighting is a plurality of LED light source 10 is mounted on a printed circuit board (B) in which a plurality of electrical and electronic devices for driving the LED (L) is mounted to constitute a light source unit 20, each The light emitted from the LED light source 10 is integrated by passing through the light transmission cover (P) has a basic configuration to configure the lighting unit 30 to diffuse the emission.

In this configuration, the LED light source 10 has an aspherical lens 11 that diffuses and emits light at an angle of 180 ° or more and up to 250 ° in front of the light of each LED (L) as shown in the graph of FIG. 5. Formed and configured.

In particular, in such a configuration, the LED light source 10 is coupled to the reflection unit 40 is configured. The reflecting unit 40 is configured to form a reflecting surface 41 by being fitted up to the line of the boundary point between the LED L of each LED light source 10 and the aspherical lens 11. At this time, the reflection unit 40 reflects the light emitted by the aspherical lens 11 in excess of 180 degrees to the light transmission cover (P) side.

In the above configuration, the reflection unit 40 is a plate-shaped configuration in which a plurality of through holes 42 for passing the aspherical lens 11 of each LED light source 10 is formed. At this time, the reflective surface 41 is preferably formed in a single plane for uniformly reflecting the light emitted by the aspherical lens 11 of the LED light source 10.

In addition, the reflective unit 40 has a through hole 42 for fitting the aspherical lens 11 of the LED light source 10 corresponding to the point where the respective LED light source 10 is disposed. In particular, a reflection protrusion 43 is formed on the plane between the through holes 42 to reflect the light of 180 ° or less emitted through the aspherical lens 11 and proceed toward the light transmission cover P side.

The reflective projection 43 has a conical shape of a narrow upper side and a wide lower side in order to allow light to be reflected toward the light transmission cover P side, and a polygonal shape having a semi-circular shape or a polygonal angle on a plane. Can be presented.

In the above configuration, the LED light source 10 is a surface mount device (SMD) type LED (L) mounted on a printed circuit board (PCB) (B) or the like as described above, and the LED (L). It has a basic configuration consisting of an aspherical lens 11 formed integrally with the tip of the light is emitted. At this time, the LED (L) is a chip-like configuration for emitting light to the tip. In the drawing, the LED (L) is formed in a rectangular shape, but the external shape may be formed in various forms such as a dome shape, a cylindrical shape.

In particular, such an LED (L) forms a molding cover 13 of the same material as the aspheric lens 11 in order to transmit light to the outside of the light emitting chip 12 to generate light of various colors to the outside. . At this time, the aspherical lens 11 extends from the molding cover 13 so as to protrude toward the tip of the LED (L) is formed integrally.

That is, the aspheric lens 11 as described above is a mold pattern that can be formed up to the aspherical lens 11 in the injection mold during the process of injection molding the outside of the light emitting chip 12 during the manufacturing of the LED (L). Of course it is. Alternatively, the aspherical lens 11 may be manufactured separately and may be coupled to the front end of the LED L by bonding or the like.

Reference numeral 14 in the figure denotes a lead terminal for supplying external power to the light emitting chip 12.

Aspheric lens 11 formed integrally with the LED (L) as described above is formed in the inclined diffuser 16 to be narrowed to the inner side on the center line that the light is emitted from the outer peripheral end of the lens body 15 through which light is transmitted do. In particular, the diffusion inclined portion 16 is formed of a curved portion 17 in which an inclined surface recessed inward from the tip is raised toward the emission center of light.

At this time, the angle of inclination of the diffusion inclined portion 16 narrows inward is 38 ° to 42 ° in one side reference horizontal plane with respect to the size of the total diameter 11 (mm) and height 5.5 (mm) of the aspherical lens 11. It is preferably formed at an angle of and maintaining an angle of 40 °. In addition, the curved portion 24 is formed with a curvature of R6 ~ R9 (mm), it is preferable to maintain the curvature of R8.

5, the aspherical lens 11 configured as described above is integrally formed in the LED (L) to form an LED light source unit, and the light of a predetermined color emitted from the LED (L) is the aspheric lens (11). Emission area obtained by vertically extending the line exiting through

According to the graph, it can be seen that the light emitted through the LED light source unit according to the present invention is diffused by more than 90 ° to both sides on the basis of the vertical line is emitted straight red. It can be seen that the light emitting area is diffused at a maximum angle of 250 ° while being diffused and emitted at an angle of 180 ° or more.

In addition, the raw material resin for manufacturing the aspherical lens 11 is mixed or alone with one or more of resins such as silicone, epoxy, PMMA, PC, PVC, ABS, PS, which can produce a synthetic resin having a transparency Can be selected and applied.

Figure 7 is an enlarged cross-sectional view of the heat radiation configuration of the lighting fixture according to the present invention.

Referring to FIG. 7 together with FIGS. 1 and 2, the lighting apparatus includes a lighting unit 30, a heat dissipation mechanism unit 50, and a heat dissipation case 60. Although the luminaire is illustrated in the form of a square in the drawing, it is possible to produce a circular, triangular or more polygonal shape according to the shape of the surface of the light transmitting cover P emitting the surface.

The lighting unit 30 includes a light source unit 20 in which a plurality of LED light sources 10 are electrically connected to electrical and electronic elements for driving the LED L, and the front of which light from the light source unit 20 is emitted. The light transmissive cover (P) for receiving light in the form of a direct light source to the surface emitting light is configured. In this case, the direct light source method means any configuration in which the light source is not provided on the side of the light transmission cover P and is disposed to face the light emitting surface. In addition, the light transmissive cover (P) in addition to the function of surface emitting light by the light emitted from the LED (L) to perform light diffusion so that the light can be irradiated over a higher luminance and a wide range of PC (Polycarbonate) It is provided as a light diffusion plate made by mixing a resin, a poly methyl meta acrylate (PMMA) resin, and a light diffusing agent.

One side of the heat dissipation mechanism unit 50 is coupled to the light source unit 20 so that heat generated from the light source unit 20 is applied, and the light transmission cover P is coupled to the other side to fix the position of the light transmission cover P. It is composed. Specifically, the heat dissipation mechanism part 50 is composed of a heat sink polymer 51 and a heat sink frame 52.

The heat sink polymer 51 is a resin that is applied to a printed circuit board B having a large number of LEDs L mounted thereon, and is configured to emit heat generated by the heat generated from the LEDs L to the outside. The heat sink polymer 51 may be a silicone resin, an epoxy resin, or the like having high thermal conductivity.

The heat sink frame 52 has one side coupled to an outer circumferential surface of the light transmission cover P, and the other side of the heat sink polymer 51 coated on the printed circuit board B and the printed circuit board B of the light source unit 20. ) In contact with The heat sink frame 52 is configured to transfer heat applied to the printed circuit board B and the heat sink polymer 51 to be discharged to the outside. In particular, the heat sink frame 52 may be made of an aluminum material having excellent thermal conductivity and strength, or may be made of a heat conductive plastic in which the heat sink polymer 51 is solidified.

The heat dissipation case 60 is provided outside the heat dissipation mechanism part 50 to form an exterior. At this time, the heat dissipation case 60 is disposed so that the inner surface of the heat dissipation mechanism part 50 is maintained at a constant distance so that the outside air passes between the heat dissipation mechanism part 50 and the inner surface and performs heat exchange. ).

That is, the heat dissipation case 60 has an inlet 62 formed at the end side of the heat dissipation unit 50 to which the light transmission cover P is coupled, considering that the lighting apparatus is installed on the ceiling as shown in FIG. The outlet 63 is formed in the substantially center of the heat dissipation case 60, and is comprised.

Here, the punching plate 64 is coupled to the inlet 62 and the outlet 63 of the heat exchange passage 61, respectively. The punching plate 64 is configured by forming a plurality of through holes throughout the front surface of the punching plate 64 so as to pass air while maintaining a state of engagement with the heat radiating mechanism unit 50.

Reference numeral 65 in the drawings represents a coupling member for firmly connecting the heat dissipation case 60 and the heat dissipation frame 52 of the heat dissipation mechanism part 50.

The heat generated by the LED (L) by the above configuration is radiated to the outside of the heat dissipation mechanism unit 50 through the heat sink polymer 51 and the heat sink frame 52 in the light source unit 20, wherein, Heat radiated to the outside of the heat dissipation mechanism part 50 is guided to the air introduced into the inlet 62 of the heat exchange passage 61 formed inside the heat dissipation case 60, and then discharged to the outlet 63 of the heat dissipation case 60. The luminaire according to the present invention can obtain more improved cooling efficiency.

8 is a circuit block diagram of a light source unit of a luminaire according to the present invention;

Referring to the drawings, the light source unit 20 has a circuit structure consisting of a bridge diode rectifying circuit unit 21 and an LED driver 22 for driving the LED (L). In addition, the light source unit 20 is configured by adding a constant current supply circuit unit 23 to the above configuration.

The bridge diode rectifying circuit unit 21 is configured to receive an AC power source that is a driving source of the device and convert it into a drive power source of the direct current type LED (L) for output. The bridge diode rectifying circuit unit 21 may be provided in the form of an integrated chip of one chip.

The LED driver 22 is configured by connecting a specific number of LEDs (L) in series to emit light by the power input through the bridge diode rectifier circuit 21. That is, the specific number of LEDs (L) is configured so that the LED (L) can be driven by receiving the desired voltage through the voltage drop of the power input through the bridge diode rectifier circuit 21.

Specifically, since the LED (L) has a forward voltage of about 3.2V per unit, when the above-mentioned LED (L) is connected in series of 60 to 72, about 192V ~ 230V is stepped down by the LED. Therefore, in this embodiment, 192 ~ 230V is removed from the rectified voltage of 220 ~ 300V and the remaining voltage is used for setting the current through a resistor (not shown, but mounted in series with the LED) to drive the LED (L) You will be able to.

The constant current supply circuit unit 23 is configured to supply the power rectified by the bridge diode rectifying circuit unit 21 at a constant amount of current at all times. The constant current supply circuit unit 23 may be configured in various circuit forms, such as a transistor amplification circuit, an OP amplifier or a regulator circuit, it is preferable to apply a constant current IC of one chip.

1 is a perspective view of a lighting fixture according to the present invention.

2 is a cross-sectional view of a lighting device according to the present invention.

Figure 3 is a perspective view of the LED light source of the luminaire according to the present invention.

Figure 4 is a cross-sectional view of the LED light source of the luminaire according to the present invention.

Figure 5 is a graph of the emission area of light in the LED light source of the luminaire according to the present invention.

Figure 6 is an enlarged cross-sectional view of the reflecting portion of the luminaire according to the present invention.

Figure 7 is an enlarged cross-sectional view of the heat radiation configuration of the lighting fixture according to the present invention.

8 is a circuit block diagram of a light source unit of a luminaire according to the present invention;

<Explanation of symbols for the main parts of the drawings>

10: LED light source 11: aspherical lens

20: light source unit 21: bridge diode rectifier circuit unit

22: LED driver 23: constant current supply circuit

30: lighting unit 40: reflection unit

41: reflective surface 43: reflective projection

50: heat dissipation mechanism 60: heat dissipation case

Claims (5)

A plurality of LEDs (L) are arranged in a plane in one direction, the light is emitted, and the light emitted from each LED (L) is integrated and diffused by passing through the light transmission cover (P) to the LED luminaire to produce lighting In An LED light source 10 having an aspherical lens 11 for diffusing and emitting light at an angle of 180 ° or more in front of the light emitted from each of the LEDs L; Light emitted more than 180 ° by the aspherical lens 11 is formed by forming the reflecting surface 41 by being fitted to the line of the boundary point of the LED L and the aspherical lens 11 of each LED light source 10. Reflecting unit 40 for reflecting to the light transmission cover (P) side; Light fixture to which the surface light source of the direct light source method having a light reflecting means comprising a. The method of claim 1, wherein the reflection unit 40 A plurality of through-holes 42 are formed for the aspherical lens 11 of each LED light source 10 to pass through, reflecting an angle of 180 ° or less between the formed through-holes 42 to the light transmission cover P side. Reflective projection 43 to advance; The luminaire to which the surface light source of the direct light source method having a light reflecting means comprising a. The method of claim 1 or 2, wherein the aspherical lens 11 It is formed integrally with the LED (L) so as to protrude from the tip of the LED (L), the light emitted from the LED (L) is reflected, diffracted, refracted through the diffusion inclined portion 16 recessed inward from the tip to at least 180 A luminaire having a direct light source type surface light source having a light reflecting means, characterized in that the light is extended so as to be extended at an angle of up to 250 ° above the angle. The method of claim 1, The plurality of LED light sources 10 are electrically connected to electrical and electronic elements for driving the LED (L) and composed of a light source unit 20, and the direct light source in front of the light emitted from the light source unit 20 is emitted. An illumination unit 10 including the light transmission cover P for receiving light and surface emitting light; One side is coupled to the light source unit 20 and the heat generated from the light source unit 20 is applied, and the light transmission cover P is coupled to the other side to the heat radiating mechanism unit 50 to fix the position of the light transmission cover P and ; It is provided on the outside of the heat dissipation mechanism part 50 to form an exterior, and the heat dissipation mechanism part 50 and the inner surface are arranged at regular intervals so that external air passes between the heat dissipation mechanism part 50 and the inner surface to perform heat exchange. A heat dissipation case 60 including a heat exchanging passage 61; The luminaire to which the surface light source of the direct light source method having a light reflecting means comprising a. The method of claim 1, wherein the light source unit 20 A bridge diode rectifying circuit unit 21 which receives an AC power source that is a driving source of the device and converts the same into a power source for driving the LED L; In order to emit light by the power inputted through the bridge diode rectifier circuit 21, a specific number of LEDs L are connected in series to receive the desired voltage through the voltage drop of the inputted power supply LED 22 ); The luminaire to which the surface light source of the direct light source method having a light reflecting means comprising a.

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