KR101069690B1 - LED lighting apparatus using aspherics - Google Patents

Abstract

According to the present invention, the light incident from the light source side of the aspherical lens is scattered and refracted inside the lens to be concentrated and output to a desired point, thereby improving the luminance characteristic of the indirect illumination and varying the last irradiated property. The present invention relates to an LED lighting device using an aspherical lens that emits light by a side light source.

To this end, the present invention, the reflection surface is formed on one surface in order to reflect the light incident by the light source disposed on the side, the other side is indirect lighting type lighting apparatus having a lens or light guide plate formed as the emission surface In the reflective surface of the lens or the light guide plate, an aspherical lens portion is formed on both sides of a lens surface formed in a round shape on the reflective surface so as to concentrate the light incident from both sides toward the emission surface side.

Lens, Light Guide Plate, Aspheric Lens

Description

LED lighting apparatus using aspherical lens emitting light by side light source {LED lighting apparatus using aspherics}

The present invention relates to an LED lighting apparatus using an aspherical lens that emits light by a side light source. In detail, the present invention improves the luminance characteristics of the indirect illumination and the last irradiated characteristics by allowing the light incident from the light source on the side of the aspherical lens to be scattered and refracted inside the lens to be concentrated at a desired point. The present invention relates to an LED lighting device using an aspherical lens that emits light by a side light source.

In addition, when the light source is applied to the LED, the present invention provides a variety of additional means for condensing and diffusing the light on the light exit surface of the aspherical lens, and by changing the color temperature for a light source of a specific color, white light and a specific color light The present invention relates to an LED lighting device using an aspherical lens that emits light by a side light source so as to obtain an illumination having a variety of color production functions and manufacturing benefits in constructing the device.

Lighting equipment for realizing the main lighting of the room has various 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.

Such lighting methods are classified into direct lighting methods, and the amount of power consumed in the case of fluorescent lamps or halogen lamps is high, and it is difficult to satisfy the demands of various consumer lighting colors, and the lighting fixture itself is the size of fluorescent lamps or halogen lamps. Due to the large size, due to the large amount of inconvenience caused by the interior, exterior interior lighting, etc. are generated.

Therefore, conventionally, the lighting apparatus using the fluorescent lamp or the halogen lamp as a light source has been replaced by a configuration in which the LED is used as the light source. That is, such an LED light source consumes less power and can produce various colors of illumination, and in particular, due to the size of the LED device, a small lighting device can be manufactured.

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.

In particular, the LED lighting device as described above, the light emitted from the LED light source, which is not a direct lighting method such as a fluorescent lamp or a halogen, is incident into the lens or the light guide plate, and the light is scattered and reflected from the inside to be irradiated in a desired direction. It is advantageous to manufacture indirect lighting method.

Such indirect lighting is generally applied to various interior lighting because it is a soft light that is surface-emitted on the lens or the light guide plate.

In the indirect lighting method, the light source is disposed on one side or both sides of the lens or the light guide plate for performing surface emission, and when the light incident from the light source enters the lens or the light guide plate, the light is emitted from the inside of the lens or the light guide plate. This scattering and reflection causes light to be emitted to the exit surface of the lens or light guide plate.

Here, the lens and the light guide plate are made of a synthetic resin material for transmitting light at a constant transmittance and reflectance, the shape of which is formed in the form of a substantially rectangular plate body. In addition, the lens and the light guide plate are configured to reflect the light incident on the opposite side of the exit surface to the exit surface side is configured to maximize the reflection efficiency of the light.

In the above lighting apparatus, since the reflective layer of the lens or the light guide plate is formed in a plane, a dark region is formed on one side (for one light source) or the center side (for both light sources) of the light guide plate at a considerable distance from the light source of the light guide plate. The problem that light of uniform brightness is not emitted to the plane is exposed.

In particular, the above lighting device only performs the function of allowing the light to be emitted to the desired point, and responds to the needs of consumers because it does not limit various types of light irradiation in response to various installation purposes of the lighting device. Difficulties occur in manufacturing lighting devices.

In addition, the lighting device is also applied to the LED applied as a light source to emit only white light in white, the manufacturing cost for manufacturing the backlight unit is excessively expensive because the LED itself emitting the white light is quite expensive. Is exposed.

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

Accordingly, the present invention, by forming an aspherical lens portion on the reflecting surface of the lens or the light guide plate so that the light incident from the light source of the side can be concentrated to the exit surface side, thereby improving the brightness of the light emitted through the exit surface and the light is It is a first object to provide a lighting device that can emit evenly over the entire area of the exit surface.

The present invention, when the light incident from the side is emitted through the exit surface last irradiated to the desired point can be configured to change the shape of the light irradiated from the exit surface in various ways to implement a more various types of illumination The second purpose is to provide a lighting device.

The present invention provides a lighting device that obtains higher luminance characteristics and reduces manufacturing costs by allowing the functional resin layer to condense light on the light exit surface of the lens or the light guide plate to be simultaneously produced with the light guide plate. Has a third purpose.

The present invention, by forming a color conversion means that can change the color temperature for a light source of a specific color on the reflective surface or the light emitting surface of the lens or light guide plate to reduce the manufacturing cost according to the free selection of the LED applied as a light source, the existing white light The fourth object is to provide a lighting device that can be applied to interior lighting by expressing various colors beyond the form of exiting the bay.

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

To this end, the present invention, the reflection surface is formed on one surface in order to reflect the light incident by the light source disposed on the side, the other side is indirect lighting type lighting apparatus having a lens or light guide plate formed as the emission surface In the reflective surface of the lens or the light guide plate, an aspherical lens portion having a lens surface formed in a round shape on both sides of the reflective surface is formed on both sides in order to concentrate the light incident from both sides toward the emission surface side.

In this case, the lens surface is formed to be inclined toward the exit surface from the end of the light source is disposed from the end of the center of the lens or the light guide plate is formed round, or the round shape of the same gradient protrudes from both sides of the cross section from the center of the lens or light guide plate. . In particular, the reflective surface is formed by depositing a reflective film or coating a reflective paint.

In addition, the lens or the light guide plate is formed in a planar circle or polygon. At the same time, the lens or the light guide plate is recessed inwardly over a part of the reflective surface or the light bulb, and a reflection groove for scattering and reflecting light incident from the light source is formed.

The present invention has the following configuration to achieve the second object.

The present invention is configured to form a converging lens portion having a single round surface protruding so that the light reflected from the reflecting surface can be converged and irradiated to the center side of the emitting surface.

Alternatively, the present invention provides a diffused lens portion for allowing the light reflected from the reflecting surface to extend to the outside from the exit surface is irradiated, the diffuse lens portion is a light source is disposed from the center of the exit surface It may be formed to be inclined toward the reflective surface at the end and formed round or protruding round shapes of the same gradient on both sides of the cross section from the center of the exit surface.

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

In the present invention, a functional resin layer obtained by mixing a light diffusing agent with a resin composition for forming a lenticular lens is formed on the exit surface of the lens or the light guide plate by a double extrusion or a double injection process with the lens or the light guide plate.

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

In the present invention, a color conversion fluorescent layer is formed on the exit surface of the lens or the light guide plate to change the color temperature of the emitted light. In particular, the reflective coating applied to the reflective surface of the lens or the light guide plate is formed by mixing color temperature fluorescent materials to change the color temperature when the light incident by the light source is reflected.

As described above, the present invention improves the brightness of the light emitted through the exit surface and improves the luminance of the light emitted through the exit surface by allowing the light incident from the light source on the side surface to be exited by the configuration of the aspherical lens part. There is an effect that can be emitted uniformly over the entire section.

In addition, the present invention enables the functional resin layer for condensing and diffusing light to be simultaneously manufactured with the lens or the light guide plate, thereby further improving the luminance characteristics of the emitted light and reducing the manufacturing cost due to simultaneous production of the light guide plate and the functional layer. It can be effective.

At the same time, the present invention can change the color temperature with respect to the light source of a specific color by the color conversion means formed on the reflecting surface or the light emitting surface of the lens or the light guide plate, thereby reducing the manufacturing cost according to the free selection of the LED applied as the light source In addition to the existing white light output form a variety of colors to achieve the effect that can be applied to the interior small lights.

Embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a lighting apparatus according to the present invention, FIG. 2 is a sectional view of a lighting apparatus according to the present invention, FIG. 3 is a sectional view of a lens surface of the lens of the lighting apparatus according to the present invention, and FIG. 3 is a lens of a lighting apparatus according to the present invention. Is a perspective view of various forms.

Referring to the drawings, the lighting apparatus according to the present invention, the light source 40 (LED applied) is disposed on the side of the lens or the light guide plate 10 formed with the reflective surface 11 and the emission surface 12, the light source 40 The outer side of the disposed lens or light guide plate 10 is provided with a casing (C) for implementing the lighting device in the form of a product.

In the configuration as described above, the aspherical lens portion 13 to the reflection surface 11 of the lens or the light guide plate 10 to focus and reflect the light incident from the light source 40 of the side toward the exit surface 12 side Is formed. Here, the aspherical lens unit 13 is formed by forming the lens surface 14 formed in a round shape on the reflective surface 11 at both sides.

At this time, the round lens surface 14 as described above may be presented in two forms as shown in FIG.

The lens surface 14 may be formed to be inclined toward the exit surface 12 and formed round at the end where the light source 40 is disposed from the center of the lens or the light guide plate 10. Alternatively, the lens surface 14 may be formed to protrude round shapes having the same gradient on both sides of the cross section from the center of the light guide plate 10.

Such a round lens surface 14 is configured to reflect the light incident from both sides to the exit surface 12 as much as possible, the curvature of the light source 40 disposed on both sides of the light guide plate 10, the light source It selects suitably according to the brightness | luminance of the light radiate | emitted from 40, and the number and angle in which the light source 40 is installed.

In addition, the reflective surface 11 is formed by depositing and attaching the reflective film 11a in order to maximize the reflection efficiency of light (adopted configuration of the present embodiment), or the reflective paint is configured by mirror or white coating on the reflective surface 11 do.

In particular, a reflective groove 15 is formed on the reflective surface 11 of the lens or the light guide plate 10 over a part of the reflective surface 11 or the whole light bulb, as shown in the circle view of FIG. 2. In this case, the reflective groove 15 is recessed to the inside of the reflective surface 11 to scatter and reflect the light incident from the light source 40. To this end, the reflective groove 15 may be recessed in a round shape or in a triangular shape in cross section.

In the above configuration, the lens or the light guide plate 10 may be configured to have a planar circular or polygonal configuration. At this time, the lens or the light guide plate 10 is formed in a circular, square, hexagon, as shown in (a), (b), (c) of the drawing, the aspherical lens portion 13 is formed on the reflective surface 11 Of course.

Such various types of lenses or light guide plate 10 may also affect the appearance of the lighting apparatus, thereby manufacturing a variety of lighting apparatus products. In particular, when configured in parallel with the configuration of the color conversion fluorescent layer 50 of another embodiment 2 to be described later it can be variously implemented as interior lighting for the purpose of interior decoration.

<Other Example 1>

5 and 6 illustrate another embodiment 1 according to the present invention.

Referring to the drawings, the lighting apparatus of another embodiment 1 proposes a configuration in which the irradiation form of light emitted through the emission surface 12 is changed in various ways. The configuration of such a lighting device can be implemented by limiting the shape of the exit surface (12).

5 is a configuration for obtaining the maximum brightness by converging the light irradiated through the exit surface 12 toward the center as possible. To this end, a converging lens part 12a is formed on the exit surface 12 of the lens or the light guide plate 10.

The converging lens part 12a is configured to protrude so that a single round surface is raised in a direction in which light is emitted in order to allow the light reflected from the reflecting surface 11 to be converged and irradiated to the center side of the emitting surface 12. to be.

Reference numeral L in the figure represents the form in which light is converged to the maximum.

FIG. 6 is a configuration for radiating light radiated through the exit surface 12 to the outside as much as possible so as to illuminate light with a softer light and a wider range without glare. To this end, the emission surface 12 is formed with a diffused lens portion 12b for allowing the light reflected from the reflective surface 11 to be extended and irradiated outward from the emission surface 12.

The diffusion lens part 12b is formed to be inclined toward the reflecting surface 11 at the end where the light source 40 is disposed, starting from the center of the emission surface 12, and is formed round or from the center of the emission surface 12. It is a configuration in which the round shape of the same gradient protrudes on both sides of the cross section.

In the figure, the symbol L 'represents a form in which light is diffused and irradiated as much as possible.

<Other Example 2>

Figure 7 is another exemplary embodiment of the present invention.

Referring to the drawings, the lighting apparatus of another embodiment 2 is a resin composition for forming a lenticular lens layer (a configuration in which a plurality of projections protruding in a triangular shape in the drawing) on the exit surface 12 of the lens or light guide plate 10; The structure which consists of forming a light-diffusion agent and forming the single functional resin layer 23 is shown.

In this case, the lenticular lens is a configuration for condensing the emitted light, as is well known, and the light diffusing agent improves the luminance characteristics of the light emitted by mixing the light diffusion beads in the form of particles with a resin or the like. .

In particular, the functional resin layer 23 is configured to be integrally formed by a double extrusion or a double injection process in the extrusion or injection process of the light guide plate 10. As a result, the manufacturing process of the backlight unit is further shortened, thereby significantly reducing the manufacturing cost.

<Other Example 3>

8 is another exemplary embodiment 3 of the present invention.

Referring to the drawings, the lighting apparatus of another embodiment 3 proposes a configuration in which the color conversion fluorescent layer 50 is formed to change the color temperature of light emitted from the exit surface 12 of the lens or the light guide plate 10.

Alternatively, the color conversion fluorescent layer 50 may be formed by adding a function to the reflective surface 11 rather than the emission surface 12 of the lens or the light guide plate 10. That is, in the reflective paint applied to the reflective surface 11 to perform the function of the color conversion fluorescent layer 50, a color temperature fluorescent material is used to change the color temperature when the light incident by the light source 40 is reflected. It can be configured to be mixed to form a reflective layer.

The color conversion fluorescent layer 50 as described above is manufactured to be excited by the light of a specific color emitted by the light source 40 (including the meaning of light emitted from the light source or the emission surface) to emit white light. To this end, the color conversion fluorescent layer 50 converts light of a specific color emitted from the light source 40 into a light having a characteristic of transmitting light in order to convert the light of a specific color into a light of a desired color temperature (mainly white light). It is formed by mixing fluorescent pigments suitable for converting into light of a desired color temperature.

Here, the raw material may be applied in various materials. Specifically, the various materials are glass, silicon, poly methyl methacry (PMMA), polycarbonate (PC), polystyrene (PS), polyethylene terephthalte (PET), SAN (= AS, acrylonitrile styrene), and PVC (Polyvinyl Chloride). Can be applied. In particular, the raw material may be independently applied to one of the materials presented, it may be applied by mixing two or more of these materials.

In addition, it is natural that the phosphor is classified as PL (Photoluminescence), and it is not limited to the application range such as a yag system, a non-yag system, a tungsten system, and the like.

The color conversion fluorescent layer 50 is formed by applying a gel liquid. Here, the color conversion fluorescent layer 50 may be manufactured by combining the film-shaped member in which the gel-like liquid is solidified, but this is a process of applying the coating coating described above in consideration of the minute spacing, manufacturing time, cost, and the like of the bonding surface. It is preferable to select.

In the substrate of the above embodiment, the color conversion fluorescent layer 50 includes all of the fluorescent layers having red, green, and blue light emitting characteristics, respectively, and changes the light of the light source 40. Red-Green-Blue phosphor material will be used as a general concept.

For reference, the color conversion fluorescent layer 50 is characterized by producing a desired color temperature, starting with white light through a suitable combination of light emitting nanoparticles and an inorganic fluorescent layer. The light emitting nanoparticles may include at least one selected from the group consisting of red light emitting nanoparticles, green light emitting nanoparticles, and blue light emitting nanoparticles, and the inorganic fluorescent layer may be a red inorganic phosphor, a green inorganic phosphor, and a blue inorganic phosphor. At least one selected from the group consisting of.

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

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

3 is a sectional view of the lens surface of the lens of the lighting apparatus according to the present invention.

Figure 4 is a perspective view of various forms of a lens of the lighting apparatus according to the present invention.

5 and 6 illustrate another embodiment 1 according to the present invention.

Figure 7 is another exemplary embodiment according to the present invention.

Figure 8 is another exemplary embodiment according to the present invention.

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

10: lens or light guide plate 11: reflecting surface

12: exit surface 12a: converging lens unit

12b: diffused lens portion 13: aspherical lens portion

14: lens surface 23: functional resin layer

50: color conversion fluorescent layer

Claims (10)

In order to reflect the light incident by the light source 40 disposed on the side surface of the reflection surface 11 is formed, the other side of the indirect lighting method having a lens or light guide plate formed of the emission surface 12 In the lighting device, On the reflective surface 11 of the lens or the light guide plate 10, the lens surface 14 formed in a round shape on the reflective surface 11 in order to be able to concentrate the light incident from both sides toward the emission surface 12 side both sides Aspherical lens portion 13 formed of the On the exit surface 12, a converging lens portion 12a having a single round surface protruding to allow light reflected from the reflecting surface 11 to be converged and irradiated to the center side of the exit surface 12 is provided. LED lighting apparatus using an aspherical lens that emits light by a side light source, characterized in that formed. The method of claim 1, wherein the lens surface 14 From the end where the light source 40 is disposed, starting from the center of the lens or the light guide plate 10, the light source 40 is formed to be inclined toward the exit surface 12, and is rounded or has the same gradient on both sides of the cross section from the center of the lens or the light guide plate 10. LED lighting device using an aspherical lens that emits light by a light source, characterized in that the round shape is protruding. The method of claim 1, wherein the reflective surface 11 LED lighting apparatus using an aspherical lens that emits light by a side light source, characterized in that the reflective film (11a) is deposited and attached, or formed by coating a reflective paint. delete In order to reflect the light incident by the light source 40 disposed on the side surface of the reflection surface 11 is formed, the other side of the indirect lighting method having a lens or light guide plate formed of the emission surface 12 In the lighting device, On the reflective surface 11 of the lens or the light guide plate 10, the lens surface 14 formed in a round shape on the reflective surface 11 in order to be able to concentrate the light incident from both sides toward the emission surface 12 side both sides Aspherical lens portion 13 formed of the A diffuse lens portion 12b is formed on the emission surface 12 to allow light reflected from the reflective surface 11 to be radiated outwardly from the emission surface 12, and the diffusion lens portion 12b is formed to be inclined toward the reflecting surface 11 at the end where the light source 40 is disposed starting from the center of the emitting surface 12, and is formed round or the same on both sides of the cross section starting from the center of the emitting surface 12. LED lighting device using an aspherical lens that emits light by a light source, characterized in that the round shape of the gradient is projected. The method according to claim 1 or 5, On the exit surface 12 of the lens or light guide plate 10, a functional resin layer 23 formed by mixing a light diffusing agent with a resin composition for forming a lenticular lens has a lens or light guide plate 10 and a double extrusion or double injection process. LED lighting apparatus using an aspherical lens that emits light by a side light source, characterized in that formed by. The method according to claim 1 or 5, An LED illuminator using an aspherical lens emitting light by a side light source, characterized in that a color conversion fluorescent layer (50) is formed on the exit surface (12) of the lens or light guide plate (10) to change the color temperature of the emitted light. The method of claim 3, wherein In order to change the color temperature when the light incident by the light source 40 is reflected, the reflective paint applied to the reflective surface 11 of the light guide plate 10 is mixed with a color temperature fluorescent substance to form a reflective layer. LED lighting device using an aspherical lens that emits light by a side light source. The method of claim 1, wherein the lens or the light guide plate 10 LED lighting device using an aspherical lens that emits light by a light source, characterized in that formed in a circular or polygonal plane. The method of claim 1 or 5, wherein the lens or the light guide plate 10 An aspherical lens emitting light by a side light source, characterized in that a reflection groove 15 for scattering and reflecting the light incident from the light source 40 is recessed inwards over a portion of the reflection surface 11 or all the light bulbs. LED lighting device used.

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