KR20160076861A - Light cylinder and lighting technology and manufacturing method thereof - Google Patents

Abstract

Disclosed are an optical cylinder which is manufactured by a method for filling an ultraviolet curable resin inside the optical cylinder, and a manufacturing method thereof. The optical cylinder comprises: an outer layer; and an inner layer formed by filling an optical resin in an inner space of the outer layer. The refractivity of the filled optical resin is determined by considering the refractivity of the outer layer.

Description

TECHNICAL FIELD [0001] The present invention relates to a light cylinder, a light cylinder and a lighting method,

The present invention relates to an optical cylinder composed of a clay filled with an optical resin and a method of manufacturing the same. More particularly, the present invention relates to a light cylinder having flexibility, which is composed of a clay filled with an ultraviolet curable resin having a high adhesive force and a small shrinkage percentage And a method for producing the same.

The light pipe is a device which transmits the light generated from the light source through the inside of the light pipe. It can be transmitted with a relatively small loss of light up to a remote place and can be made thin, and thus it is getting attention in the lighting market.

The conventional light pipe has an air layer inside the pipe, and is configured in such a manner that a diffusion process or a prism-like reflection pattern process is performed inside or outside the light pipe. Such a light pipe uses a diffusion treatment surface to emit light input from the air layer to the outside or internally reflects the light through a reflection pattern processing surface.

In this case, although the light output from the light source and transmitted through the light pipe should be uniformly transmitted from the light inlet to the light pipe, it is not uniformly transmitted over the entire light pipe due to the hot spot phenomenon occurring in the light pipe. have. This is a phenomenon occurring in a diffusion layer formed to emit a uniform light beam, which is disadvantageous in that the uniformity and brightness of the light pipe or the light emitting surface are lowered due to the hot spot phenomenon due to the diffusion layer present in the light entrance portion of the pipe. In order to solve such a problem, in the case of the diffusion type light pipe, a plurality of LEDs are installed inside the pipe to increase the uniformity of the surface, but the consumption of the LED is increased to increase the power consumption and manufacturing cost.

The present invention provides a light cylinder manufactured by filling a resin capable of ultraviolet curing into the interior thereof, and a method of manufacturing the same. Here, the light cylinder may have a flexible characteristic.

Also, the present invention is to provide a light cylinder which can reduce the phenomenon of hot spots (light leakage) generated in the light-incident portion and ensure uniformity in the entire region, and a method of manufacturing the same.

According to an aspect of the present invention, there is provided a light cylinder and a method of manufacturing the same.

According to the first embodiment, the outer layer; And an inner layer (core layer) formed by filling an optical resin in the inner space of the outer layer, wherein the refractive index of the optical resin to be filled can be determined in consideration of the refractive index of the outer layer.

The outer layer is a clay, and the inner layer is a core, and the thickness of the clay is 0.01 mm or more and 10 mm or less.

The clay is a material that can be rolled, and the optical resin to be filled is an ultraviolet curable resin.

The optical resin to be filled can be formed by combining a plurality of optical materials in consideration of the refractive index of the outer layer.

The clay may be manufactured by extrusion and may be made of a material having excellent light transmittance and mechanical stability and having flexibility such as polycarbonate, polymethylmethacrylate (PMMA) silicone, polyethylene (PE) polyethylene ), Polypropylene (PP) resin, polytetrafluoroethylene, polystyrene, polyvinyl chloride, and the like.

According to the second embodiment, a clay made of a material having a first refractive index; And a core filled with an optical material produced by mixing an optical resin such as urethane acrylate, epoxy acrylate, acrylic monomer, acrylic resin, etc., into a clay, wherein the core has a second total reflection relationship with the clay A light cylinder having a refractive index can be provided.

The core may be formed by filling an optical resin manufactured in the clay inner space.

According to the third embodiment, the first step of filling the clay with the optical resin; And a second step of curing the optical resin, wherein the refractive index of the optical resin to be filled is determined in consideration of the refractive index of the clay. The refractive index of the optical resin is designed to satisfy the following expression.

는 가중치를 나타내며, 0.001≤

≤0.10 조건을 만족한다.here,

Represents a weight, and 0.001?

≤0.10 condition is satisfied.

The direction for curing the optical resin coincides with the direction in which the optical resin is filled.

The curing is ultraviolet curing.

A defoaming process may be further performed to remove bubbles generated in the optical resin filling process.

The optical cylinder according to the present invention includes a core filled with a resin for ultraviolet curing, and can totally transmit the light emitted from the light source to the emitting surface. At this time, the resin is selected in consideration of the refractive index of the clay of the optical cylinder so that total internal reflection can be performed, and may be a single material or a mixed material.

In particular, when the optical resin is made of a mixed material, the combination of the optical resin may be variously modified as long as it allows total internal reflection. That is, the selection width of the optical resin for filling can be widened.

In addition, in the optical cylinder of the present invention, there is an advantage that the uniformity of light transmission in the entire region of the optical cylinder can be ensured because the optical loss phenomenon hardly occurs near the light-incoming portion.

1 is a perspective view of a light cylinder according to a first embodiment;
2 is a perspective view of a light cylinder according to a second embodiment;
3 is a view showing a manufacturing process of an optical cylinder according to the first embodiment;
FIG. 4 is a view for explaining the manufacturing process of FIG. 3; FIG.
5 is a view for comparing simulation results of light loss phenomenon of a conventional optical cylinder according to the first embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The present invention relates to a light cylinder manufactured by filling an optical resin capable of being cured with ultraviolet rays and a method of manufacturing the same. For example, the optical cylinder can be manufactured by filling a light-transmitting resin such as a tube with a light-transmitting resin in a clay, and then curing the ultraviolet ray.

According to one embodiment, the core produced by the curing of the filled optical resin may have a total reflection relationship with the clay. As a result, the light incident on the light cylinder can be transmitted to the light emitting surface of the light cylinder.

According to another embodiment, the optical resin forming the core may be produced by mixing a plurality of materials capable of photoproduction. Preferably, a resin having a desired refractive index may be formed by mixing optical materials so as to form a total reflection relationship with the material forming the clay. However, components of the optical resin may be variously modified as long as the clay and the core have a total reflection relationship, and it will be obvious to those skilled in the art that such a modification falls within the scope of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a light cylinder according to a first embodiment, and FIG. 2 is a perspective view of a light cylinder according to a second embodiment.

As shown in FIG. 1, the optical cylinder 100 according to the first embodiment includes a clay (110), a clay (outer layer), and a core (120, core, inner layer). The shape of the optical cylinder 100 is not particularly limited, and may have various shapes such as a circle, a support, an ellipse, a square, and a triangle. Further, the shape of the light cylinder 100 may be curved.

The clay 110 is the sheath of the light diffusible light cylinder 100. The clay 110 may be formed of a flexible material that can be bent or bent. A curved clay is shown in Fig.

According to the first embodiment, the shape of the clay 110 may be a cylindrical shape such as a cylinder, a tube, or the like. Of course, the clay 110 may have various shapes such as a square, a triangle, a plane, etc. in addition to a cylindrical shape. The shape of the clay 110 is not limited as long as it is formed of a material capable of diffusing light and bending.

The clay 110 may be formed of a transparent or opaque resin.

The clay 110 may also be applied as an outfit product, such as a ready-made tube or cylinder.

Although the thickness of the clay 110 according to the first embodiment is not particularly limited, it may be preferable that the thickness of the clay 110 is formed in a range of 0.01 mm or more and 10 mm or less for thinning. More preferably, the thickness of the clay may be greater than 0.01 mm and less than 1 mm. However, the thickness of the clay 110 can effectively confine the light incident on the optical cylinder 100, and can be determined to such a thickness that the optical cylinder 110 can rotate.

The inside of the clay 110 includes voids (i.e., holes), since the clay 110 must simultaneously perform the function of sheathing for forming the core 120. [

The clay 110 may be formed of a material selected from the group consisting of polycarbonate, polymer-thylmethacrylate (PMMA) silicone, polyethylene (PE), polypropylene (PP), polytetrafluoroethylene polytetrafluoroethylene, polytetrafluoroethylene, polytetrafluoroethylene, polytetrafluoroethene, polystyrene, polyvinyl chloride, and the like.

Here, polymethyl methacrylate (PMMA) is a polymer having methyl methacrylate as a raw material and has the highest transparency and weatherability among plastics, has a light transmittance of 90 to 91%, and is easily colored.

Polycarbonate (PC) is easily processed by molding and has excellent optical properties and toughness. That is, the polycarbonate has a visible light transmittance of about 89% on average.

Polypropylene is a thermoplastic resin that softens when heated, forms a spiral structure with a polymer of propylene monomer, has a unique crystal structure, and has properties such as excellent rigidity, heat resistance, and chemical stability.

The core 120 may be formed by filling the clay 110 with an ultraviolet curing resin and curing it. The core 120 may have transparency.

In addition to the method of manufacturing the optical cylinder 100 by filling the clay 110 with an ultraviolet curable optical resin, a method of manufacturing a light cylinder by extrusion molding of a core and a clay can be considered. However, when a light cylinder is manufactured by the extrusion molding method, the material of the core that can be used in the extrusion molding is limited. As a result, due to the material limitations of the core, the clay and core may not have a total internal reflection, and optical loss may occur.

Therefore, in the method of manufacturing a light cylinder of the present invention, the optical cylinder 100 can be manufactured by filling an optical resin capable of curing with ultraviolet rays, which can realize anisotropic characteristics, in the clay 110 to realize easy total reflection characteristics. In this case, since optical resins can be combined in various combinations and have a desired refractive index, an optical resin capable of forming total internal reflection depending on the material forming the clay 110 can be used. On the other hand, the refractive index of the core 120 formed by ultraviolet curing the optical resin may be higher than the refractive index of the clay 110 according to Snell's law.

For example, the refractive index of the optical resin can be designed so as to satisfy the following condition (1).

는 가중치를 나타내며, 0.001≤

≤0.10 조건을 만족한다.here,

Represents a weight, and 0.001?

≤0.10 condition is satisfied.

For example, when the clay 110 is made of polymethyl methacrylate (PMMA) having a refractive index of 1.492, it is preferable to use urethane acrylate and epoxy acrylate, which are optical materials having a refractive index capable of having total reflection properties according to Snell's law Or a mixture thereof.

 At this time, it is preferable that the optical materials urethane acrylate and epoxy acrylate, and the like are mixed with N-vinylpyrrolidone, 2-ethoxy-2-ethoxyethylene acrylate, 1,6-hexanediol diacrylate, N-isobutoxymethyl acrylate , Isooctyl acrylate, propoxylated neopentyl glycol diacrylate, butyl carbamoyloxyethyl acrylate, epoxy methacrylate, glycidyl methacrylate, isodecyl acrylate, isooctyl acrylate, polybutadiene di Acrylate, polyester acrylate monomer, 2-ethylhexyl acrylate, hardoxypropyl acrylate, phenyl glycidyl ether, 1,4-butanediol dimethacrylate, 1,4-butanediol diacrylate, cyclohexanediol Methanol diacrylate, ethoxylated bis A dimethacrylate, and other monomers are simultaneously mixed to obtain a low point The optical resin may be prepared.

Particularly, when the optical cylinder 100 has a curved shape as shown in FIG. 2, the clay 110 (see FIG. 2) is formed in consideration of the material of the clay 110 so that light loss phenomenon does not occur near the light- The refractive index of the optical resin or optical resin to be filled can be determined.

However, such an optical resin may be a single substance or a mixed substance. In the case of a mixed material, the materials constituting the optical resin may be various combinations in accordance with the refractive index of the optical resin determined. For example, in the case where the refractive index of the optical resin to be filled is determined to be 1.5, the optical material, such as urethane acrylate and epoxy acrylate, and N-vinylpyrrolidone, 2-ethoxy-2-ethoxyethylene acrylate, Hexanediol diacrylate, N-isobutoxymethyl acrylate, isooctyl acrylate, propoxylated neopentyl glycol diacrylate, butylcarbamoyloxyethyl acrylate, epoxy methacrylate, glycidyl methacrylate Acrylate monomers such as methyl acrylate, ethyl acrylate, butyl acrylate, ethyl acrylate, butyl acrylate, ethyl acrylate, butyl acrylate, isoamyl acrylate, isoamyl acrylate, isodecyl acrylate, isooctyl acrylate, polybutadiene diacrylate, polyester acrylate monomer, Acrylate, 1,4-butanediol diacrylate, cyclohexanedimethanol diacrylate, ethoxylated bis A dimethacrylate By combining the monomers in a suitable ratio, such as site may form the optical resin. That is, the combination of the optical resin may be variously modified as long as the refractive index is determined.

In the above description, the filling resin is ultraviolet cured. However, the filling resin is not limited to ultraviolet rays as long as the filling resin is cured after being filled in the clay 110.

In summary, in the optical cylinder manufacturing method of the present embodiment, the optical resin having the refractive index determined in consideration of total internal reflection is filled in the clay 110, and ultraviolet rays are cured to form the core 120. In this case, since the coder 120 is formed using the filling method, various combinations of the optical resins can be performed, and the core 120 having a desired refractive index can be formed by appropriately combining materials according to the refractive index of the clay 110 have. As a result, light incident on the optical cylinder 100 can be output through the light exit surface at a low loss rate. Also, the light leakage phenomenon near the light-incoming portion of the light cylinder 100 can be considerably reduced.

In the conventional light pipe, a reflection pattern is required to transmit light. However, in the light cylinder 100 of the present embodiment, no reflection pattern is required at all, and therefore, the structure of the light cylinder 100 is simplified, can do.

In the above description, the core 120 is described as one layer, but the core 120 may be formed of a plurality of layers.

3 is a view showing a manufacturing process of the optical cylinder according to the first embodiment.

First, in a first step 310, a clay 110 including an inner hole such as a tube or a cylinder is inserted to manufacture the light cylinder 100 using the filling method. In order to facilitate understanding and explanation, it is assumed that the clay 110 has the shape of a cylinder or a tube, but the shape of the clay 110 may be a square, a triangle, or the like and may be curved. The first step is as shown in 410 of FIG. According to one embodiment, the clay 110 may be an off-the-shelf product.

Then, in the second step 315, the clay 110 is filled with an optical resin that can be cured with ultraviolet rays. For example, assuming that the clay 110 is in the shape of a cylinder or a tube, the second step is to fill the cylinder or tube with the optical resin.

At this time, the optical resin may be filled with the clay 110 by using a separate resin injection device, for example, a dispenser.

When the resin is filled in the inner hole of the clay 110, the flow of resin is prevented on the other surface of the clay 110 to prevent the resin from flowing on the other surface opposite to the direction in which the resin is introduced, A mage for holding the resin can be connected. As already mentioned above, the optical resin may be an ultraviolet curable resin.

4, a process of injecting optical resin into the clay 110 is shown.

A defoaming process may be performed to remove bubbles generated in the process of filling the clay 110 with the optical resin in the third step 320. If the bubbles are penetrated into the clay 110 without being removed, the optical characteristics of the optical cylinder 100, for example, the uniformity of light transmission, may be reduced. Therefore, the method of manufacturing a light cylinder of this embodiment also removes bubbles while filling the clay 110 with the optical resin. As a result, there is an advantage that the uniformity of light transmission of the core 120 can be increased.

In the fourth step 325, the filled optical resin is cured. At this time, the curing may be ultraviolet curing.

4, the ultraviolet ray irradiation direction for ultraviolet curing of the resin may be irradiated in a direction coinciding with the direction in which the optical resin is injected into the clay 110. [

As shown in FIG. 3, a light cylinder 100 manufactured using an optical resin that can be cured with ultraviolet rays has an advantage in that it is possible to mix materials constituting the optical resin, thereby facilitating the adjustment of the refractive index.

Although not shown in the drawing, the inspection process of the optical cylinder 100 manufactured by ultraviolet curing can be further performed.

FIG. 5 is a graph comparing the simulation results of the light loss phenomenon of the optical cylinder manufactured according to the extrusion molding and the optical cylinder according to the first embodiment.

FIG. 5A is a simulation result of the optical loss of the optical cylinder according to the first embodiment, and FIG. 5B is a simulation result of the optical loss of the optical cylinder manufactured according to the extrusion molding.

As shown in FIG. 5 (b), it can be seen that in the optical cylinder manufactured by the extrusion molding, much light loss occurs in the curve region where the light source is incident.

In contrast, in the light cylinder 100 manufactured by filling the ultraviolet curable resin as in the first embodiment, it is seen that light loss phenomenon hardly occurs in the curve region where the light source is incident.

In addition, a small amount of light loss occurs in the bended part (A) in both the light pipe manufactured by the extrusion process and the light cylinder according to the first embodiment, but a very small amount The light is lost.

As a result, when comparing the light source emitted from the light emitting surface opposed to the surface on which the light source is incident, the light cylinder manufactured according to the extrusion molding has a problem that light is lost due to a large amount of light loss in a curve region adjacent to the point where the light source is incident So that light is emitted relatively weakly at the light emitting surface of the light cylinder.

On the other hand, the optical cylinder manufactured by filling the outer-curing resin according to the first embodiment has a light loss in a region where light loss has been generated in a light cylinder manufactured by extrusion molding (a curve region adjacent to a point where a light source is incident) It can be seen that light is uniformly emitted from the output end of the light cylinder.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100: Light cylinder
110: Clay
120: Core

Claims (12)

Outer layer; And
And an inner layer formed by filling an optical resin in the inner space of the outer layer,
Wherein the refractive index of the optical resin to be filled is determined in consideration of the refractive index of the outer layer.
The method according to claim 1,
Wherein the outer layer is a clay and the inner layer is a core,
Wherein the thickness of the clay is 0.01 mm or more and 10 mm or less.
The method according to claim 1,
The clay may be a wheeled material,
Wherein the optical resin to be filled is an ultraviolet curable resin.
The method according to claim 1,
Wherein the optical resin to be filled is formed by combining a plurality of optical materials in consideration of the refractive index of the outer layer.
5. The method of claim 4,
Wherein the optical material is a mixture of at least two of a urethane acrylate compound, an epoxy acrylate compound, an acrylate monomer, an acrylate including a vinyl group, a bisphenol compound, and an acrylate containing a fluorine group.
A clay comprised of a material having a first refractive index; And
A core made of an optical material formed by combining a plurality of materials,
Wherein the core has a second refractive index so as to have a total reflection relationship with the clay.
The method according to claim 6,
Wherein the core is formed by filling an optical resin in the clay inner space.
The method according to claim 6,
Wherein the optical material is a mixture of at least two of a urethane acrylate compound, an epoxy acrylate compound, an acrylate monomer, an acrylate including a vinyl group, a bisphenol compound, and an acrylate containing a fluorine group.
A first step of filling the clay with an optical resin; And
And a second step of curing the optical resin,
Wherein the refractive index of the optical resin to be filled is determined in consideration of the refractive index of the clay.
10. The method of claim 9,
Wherein the direction for curing the optical resin coincides with the direction in which the optical resin is filled.
10. The method of claim 9,
Wherein said curing is ultraviolet curing.
10. The method of claim 9,
And a defoaming step of removing bubbles generated in the optical resin filling process is further performed

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