KR101446912B1 - Illuminating device - Google Patents

Abstract

The present invention provides a lighting device including a surface emitting portion that converts light emitted from a light emitting unit into a surface light source and emits the light, and an indirect light emitting portion formed separately from the surface emitting portion and reflecting light emitted from the light emitting unit, The effect of indirect lighting using flare effect, the effect of providing additional light by using the lost light, the effect of reducing the total thickness, and the flexibility, thereby improving the degree of freedom in designing the product.

Description

ILLUMINATING DEVICE

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device technology field, and more particularly, to a lighting device structure using an LED as a light source.

The LED (Light Emitted Diode) device is a device that converts electrical signals to infrared rays or light using the characteristics of compound semiconductors. Unlike fluorescent light, unlike harmful substances such as mercury, it does not cause environmental stigma. It has a long lifetime advantage. In addition, it consumes low power compared to conventional light sources, has high visibility due to high color temperature, and has a small glare.

Therefore, the current illumination device has been developed to use a conventional light source such as a conventional incandescent lamp or a fluorescent lamp as a light source. In particular, as disclosed in Korean Patent Laid-Open No. 10-2012-0009209, A light emitting device that performs a surface light emitting function is provided.

1 and 2 schematically show a conventional lighting apparatus 1 which performs a surface light emitting function. 1 and 2, a conventional lamp device 1 includes a substrate 20 on which a planar light guide plate 30 is disposed and a plurality of side-type LEDs 10 are formed on a side surface of the light guide plate 30. [ (Only one) are arranged in an array form.

The light L incident on the light guide plate 30 from the LED 10 is reflected by the reflective sheet 40 in a fine reflection pattern provided on the bottom surface of the light guide plate 30 and is emitted from the light guide plate 30, 30 to provide light to the outside through the transparent outer housing 50 and the like. 2, a plurality of diffusion sheets 31, prism sheets 32, 33, and a protective sheet 34, etc. are provided between the light guide plate 30 and the outer housing 50, The optical sheet of the present invention may be further added.

The light guide plate 30 functions to improve the brightness of the illumination device 1 and to supply uniform light. The light guide plate 30 is provided with a light source It is one of the plastic molded lenses that uniformly transmits the diverging light. Therefore, although the light guide plate 30 is basically used as an essential part of the conventional lighting apparatus 1, the thickness of the overall product can be reduced due to the thickness of the light guide plate 30 itself, It is difficult to apply to the outer housing 50 formed by bending due to the inability of its own material to be flexible, and thus the product design and deformation of the design are not easy.

In addition, due to the characteristics of using LED, which is a point light source, there are limitations in implementing various lighting designs even if it is converted into a planar light source.

Korean Patent Publication No. 10-2012-0009209

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described problems of the prior art, and it is an object of the present invention to provide a surface emitting light emitting device using a resin layer without a conventional light pipe, Thereby differentiating the design of the lighting device.

It is another object of the present invention to provide a lighting device structure capable of thinning the overall thickness by realizing a surface emitting portion to direct light emitted from a light emitting unit to the outside by using a resin layer without using a light guide plate.

According to an aspect of the present invention, there is provided an illumination device comprising: a surface emitting portion for converting light emitted from a light emitting unit into a surface light source and emitting the light; And an indirect light emitting unit spaced apart from the face light emitting unit and reflecting the light emitted from the light emitting unit.

In the illuminating device of the present invention, the indirect light emitting portion may include a light reflecting unit formed on at least one of the side and the side of the surface emitting portion, and an indirect light emitting air gap may be formed between the side of the surface emitting portion and the light reflecting unit have.

In the illuminating device of the present invention, the light reflection unit may be formed to include a white pigment or metal for improving the reflectance.

The illumination device of the present invention may further include a support unit formed on the outer surface of the light reflection unit and under the surface emitting portion.

In the illumination device of the present invention, the surface emitting portion may include a printed circuit board on which at least one light emitting unit is mounted, a resin layer formed on the light emitting unit and embedding the light emitting unit, a diffusion formed on the resin layer Plate.

In the lighting apparatus of the present invention, the printed circuit board may be a flexible printed circuit board.

In the illuminating device of the present invention, the light emitting unit may be a side view type light emitting diode.

In the illumination apparatus of the present invention, a first spacing portion may be formed between the resin layer and the diffusion plate, wherein the first spacing portion may be formed in a range of 0 to 20 micrometers or less.

The lighting apparatus of the present invention may further include a reflective sheet formed on the flexible printed circuit board and having a structure penetrated by the light emitting unit.

In the illuminating device of the present invention, a reflection pattern may be further formed on the reflection sheet.

In the illumination apparatus of the present invention, the reflection pattern may be formed of a reflective ink containing any one of TiO ₂ , CaCo _{3 ,} BaSo 4, Al ₂ O _{3 ,} Silicon, and PS.

The illumination device of the present invention may further comprise a first optical sheet formed on the upper surface of the resin layer and dispersing the light emitted thereon, and a second optical sheet may be further formed on the first optical sheet.

The illumination device of the present invention may further include an adhesive layer formed between the first optical sheet and the second optical sheet.

In the illuminating device of the present invention, the adhesive layer may be formed of any one of a thermosetting PSA, a thermosetting adhesive, and a UV cured PSA type material.

In the illuminating device of the present invention, the adhesive layer may be provided with a second spaced portion.

In the illuminating device of the present invention, an optical pattern may be further formed on the upper surface of the first optical sheet or the lower surface of the second optical sheet to shield or reflect the light to be emitted.

In the illumination apparatus of the present invention, the optical pattern may be formed by a diffusion pattern formed using a light-shielding ink containing at least one material selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , and Silicon, A light shielding pattern formed by using a light shielding ink containing a mixed material of Al and TiO ₂ may have a superimposed structure.

In the illumination apparatus of the present invention, the diffusion pattern may be formed in a structure printed on at least one of the upper surface and the lower surface of the light-shielding pattern.

In the illuminating device of the present invention, the resin layer may be made of an ultraviolet curable resin containing an oligomer.

In the illuminating device of the present invention, the oligomer may include any one selected from the group consisting of Urethane Acrylate, Epoxy Acrylate, Polyester Acrylate, and Acrylic Acrylate.

In the illumination device of the present invention, the resin layer may be formed of at least one selected from the group consisting of sillicon, silla, glass bubble, PMMA, urethane, Zn, Zr, Al ₂ O ₃ , acryl, And a bead made of any one selected from among the beads.

According to the present invention, by arranging the indirect light emitting portion for reflecting light on the side face of the face light emitting portion, it is possible to realize various lighting effects using the flare phenomenon and to realize various design lights.

In addition, according to the present invention, the illumination effect is realized by using the light emitted to the side of the resin layer, and it has an advantage that a light effect of a light can be realized without adding a separate light emitting unit.

According to the present invention, the light guide plate is removed and light is guided by using the resin layer, thereby reducing the number of light emitting units and reducing the overall thickness of the lighting apparatus.

In addition, according to the present invention, flexibility can be ensured by forming a lighting device using a flexible printed circuit board and a resin layer, thereby improving the degree of freedom in product design.

According to the present invention, by providing a reflection sheet and a reflection pattern that are structures that can efficiently reflect light emitted from the light emitting unit, it is possible to maximize the luminance improvement as well as improve the reflectance of light, and provide a uniform planar light source There is an effect that can be done.

In addition, according to the present invention, a first optical substrate or a second optical substrate having an optical pattern is formed, and by providing an air gap in the adhesive layer, generation of hot spots and occurrence of dark portions occurring in the light- In addition, there is an effect that the reliability between the parts to be adhered to the adhesive layer is ensured, the illuminating device having no significant difference in optical characteristics can be realized, and the aligning between the parts can be effected.

Figures 1 and 2 schematically illustrate a conventional illumination device structure.
3 shows a main part of a lighting apparatus according to the present invention.
Fig. 4 shows a structure in which a reflecting sheet is added to the lighting apparatus of the present invention shown in Fig.
Fig. 5 shows a structure in which an optical substrate is added to the illumination apparatus of the present invention shown in Fig.
6 is an image showing the actual operating state of the lighting apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the embodiments described herein and the configurations shown in the drawings are only a preferred embodiment of the present invention, and that various equivalents and modifications may be made thereto at the time of the present application. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. The following terms are defined in consideration of the functions of the present invention, and the meaning of each term should be interpreted based on the contents throughout this specification. The same reference numerals are used for portions having similar functions and functions throughout the drawings.

The present invention relates to a lighting apparatus using an LED as a light emitting unit, in which an indirect light emitting unit including a light reflecting unit is formed on the side surface of a surface emitting part by removing a light guide plate and replacing it with a resin layer, And to provide a lighting device structure capable of realizing various lighting effects, innovatively reducing the total thickness of the lighting device, securing flexibility, and reducing the number of light emitting units.

In addition, the lighting device according to the present invention is applicable to various lamp devices requiring illumination, such as a vehicle lamp, a domestic lighting device, and an industrial lighting device. For example, when it is applied to a vehicle lamp, it can be applied to a headlight, a vehicle interior light, a door scarf, a rear light, and the like. In addition, the illumination device of the present invention can be applied to a backlight unit field applied to a liquid crystal display device, and can be applied to all lighting-related fields that are currently developed, commercialized, or can be implemented according to future technology development.

Fig. 3 shows a main part of a lighting apparatus according to the present invention. More specifically, Fig. 3 (a) shows a plan view of the lighting apparatus, and Fig. 3 (b) shows a side sectional view of the lighting apparatus.

3, the illumination device according to the present invention includes a surface light emitting portion X and an indirect light emitting portion Y formed on a side surface of the surface light emitting portion X, as shown in FIG. 3A. Herein, the surface emitting portion X includes a light emitting unit, and converts the light emitted from the light emitting unit into a surface light source and emits the light to the outside. The indirect light emitting portion Y is a portion that reflects the light emitted from the light emitting unit of the surface emitting portion X to generate reflected light to realize a light leakage effect (or a flare effect). 3 (a), the indirect light emitting portion Y is formed on all the side surfaces of the surface light emitting portion X. However, the indirect light emitting portion Y may be formed only on some side surfaces of the surface light emitting portion X have.

As shown in FIG. 3B, the light emitting unit 130 includes at least one light emitting unit 130 formed on the printed circuit board 110 and the printed circuit board 110, A resin layer 150 formed on the resin layer 150 for embedding the light emitting unit 130 and guiding the light to be emitted to the diffusion plate 290 and a resin layer 150 for uniformly diffusing the light incident through the resin layer 150, And a diffuser plate 290 for diffusing the diffuser plate 290. Although not shown, the diffuser plate 290 may further include a prism sheet and a protective sheet. In addition, the printed circuit board 110 may be formed of a flexible printed circuit board (FPCB) having certain flexibility.

The light emitting units 130 are arranged on the printed circuit board 110 in at least one number and emit light. The light emitting unit 130 of the present invention may be a side view type light emitting diode. That is, a light emitting diode having a structure in which the direction of light to be emitted is not directed straight up directly but is emitted toward the side, can be used as the light emitting unit 130 of the present invention. According to the illumination apparatus of the present invention, since the light emitting unit 130 including the side-type light emitting diode is directly disposed, the light is diffused toward the diffusion plate 290 by utilizing the resin layer that implements the light diffusion and reflection function. It is possible to reduce the total number of the light emitting units and to reduce the total weight and thickness of the lighting apparatus.

The resin layer 150 is formed on the printed circuit board 110 and the light emitting unit 130. The resin layer 150 spreads the light emitted from the light emitting unit 130 forward. That is, the resin layer 150 is formed to embed the light emitting unit 130, thereby performing the function of dispersing the light emitted laterally in the light emitting unit 130. That is, the function of the conventional light guide plate can be performed in the resin layer 150.

The resin layer 150 of the present invention can be basically made of a resin capable of diffusing light. For example, the resin layer 150 of the present invention may be formed of a resin which is an ultraviolet curable resin including an oligomer. More specifically, the resin layer 150 may be formed using a resin having a urethane acrylate oligomer as a main material. For example, a resin obtained by mixing a synthetic oligomer, a urethane acrylate oligomer and a polyacrylic polymer type, may be used. Of course, it may further comprise a monomer mixed with a low-boiling-point diluent type reactive monomer such as isobornyl acrylate (IBOA), hydroxypropyl acrylate (HPA), or 2-hydroxyethyl acrylate (HPA). A photoinitiator -hydroxycyclohexyl phenyl-ketone, etc.) or an antioxidant, etc. However, the above description is merely one example, and it is also possible to perform a light diffusing function which is currently developed, commercialized, The resin layer 150 of the present invention can be formed with all of the resins having the above-described structure.

The resin layer 150 of the present invention may further include a plurality of beads 151 having hollow (or voids) formed therein. The beads 151 may be mixed with the inside of the resin layer 150 And may exist in diffused form. The beads 151 serve to improve reflection and diffusion characteristics of light. For example, when the light emitted from the light emitting unit 130 is incident on the bead 151 inside the resin layer 150, the light is reflected and transmitted by the hollow of the bead 151 to be diffused and condensed, ). At this time, the reflectance and diffusivity of the light are increased by the beads 151, so that the light quantity and the uniformity of the outgoing light supplied to the diffusion plate 290 are improved. As a result, the brightness of the illumination device can be improved.

The content of the bead 151 may be appropriately adjusted to obtain a desired light diffusion effect, and more specifically, it may be adjusted within a range of 0.01 to 0.3% with respect to the weight of the entire resin layer 150, but is not limited thereto. That is, the light emitted laterally from the light emitting unit 130 is diffused and reflected through the resin layer 150 and the bead 151, and can proceed in the upward direction. The beads 151 may be made of any one selected from the group consisting of sillicon, silica, glass bubble, PMMA, urethane, Zn, Zr, Al ₂ O ₃ , And the diameter of the beads 151 may be in the range of 1 占 퐉 to 20 占 퐉, but the present invention is not limited thereto.

According to the present invention, the thickness of the conventional light guide plate can be innovatively reduced due to the presence of the resin layer 150, so that the thinness of the entire product can be realized, and a flexible printed circuit board When the flexible printed circuit board 110 is formed of a flexible printed circuit board, it has an advantage that it can be easily applied to a curved surface, an advantage that a degree of freedom of design can be improved, and the present invention can be applied to other flexible displays.

The diffusion plate 290 is formed on the resin layer 150 and serves to uniformly diffuse the light emitted through the resin layer 150 over the entire surface. The diffusion plate 290 may be formed of an acrylic resin, but is not limited thereto. The diffusion plate 290 may be formed of a material such as polystyrene (PS), polymethylmethacrylate (PMMA), cyclic olefin copoly (COC), polyethylene terephthalate ), And high-permeability plastic such as resin.

At this time, an air layer (first spacing portion) 280 may be further formed between the diffusion plate 290 and the resin layer 150 and may be supplied to the diffusion plate 290 due to the presence of the first spacing portion 280 The uniformity of light can be increased, and as a result, the effect of improving the uniformity of the light diffused and emitted through the diffusion plate 290 can be realized. At this time, in order to minimize the deviation of light transmitted through the resin layer 150, the thickness H1 of the first spacing part 280 may be formed in a range of 0 to 20 mm, but not limited thereto, It will be said that the design can be changed appropriately.

The indirect light emitting portion Y includes a light reflecting unit 161 formed on the side surface of the surface emitting portion X as shown in FIG. (X), more specifically, the resin layer 150 of the surface light-emitting portion X by a predetermined distance. Hereinafter, the spaced space between the surface light emitting portion X and the light reflection unit 161 is defined as an indirect light emission air gap 160.

When the light emitted from the light emitting unit 130 is emitted through the side surface of the resin layer 150, the light reflecting unit 161 reflects the emitted light to form reflected light (or indirect light). As a result, the light that is lost in the lighting apparatus is reflected again by the light reflection unit 161 to cause a flare phenomenon in which the light is lightly spread, and by using this, various lighting effects applicable to the interior and exterior interior and vehicle lighting can be realized .

In order to maximize the flare phenomenon, an indirect light emission air gap 160 may be further formed between the light reflection unit 161 and the surface light emitting unit X. Accordingly, the light emitted to the side of the resin layer 150 is scattered in the indirect light emitting air gap 160, and the scattered light is reflected again by the light reflection unit 161, thereby maximizing the flare phenomenon.

The light reflection unit 161 may be made of a material having excellent light reflectance, for example, a white resist, and further includes a synthetic resin dispersedly containing a white pigment or a synthetic resin dispersed with metal particles having excellent light reflection characteristics It is possible. As the white pigment, titanium oxide, aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate and the like may be used, and in the case of including a metal powder, Ag powder excellent in reflectivity may be included. It is also possible that an additional fluorescent whitening agent is further included. That is, the light reflection unit 161 of the present invention can be formed using all materials that are currently developed or can be implemented according to future technological developments, and have excellent light reflectance.

Although the height of the light reflection unit 161 is shown to be the same as the height of the printed circuit board 110 and the resin layer 150, this is only one example, and the height is not limited. For example, it may be extended to the side of the diffusion plate 290 if necessary, and may be formed only on the side surface of the resin layer 150.

Also, although the light reflection unit 161 is shown as being perpendicular to the horizontal plane in the drawing, this is also only an example, and it can also be implemented as an inclined shape at an angle with the horizontal plane as needed.

3, the illumination device of the present invention may further include a support unit 163 having a structure to surround the outer surface of the light reflection unit 161 and the lower surface of the surface emitting portion X. [ The support unit 163 is a part that supports and protects each configuration of the illumination device, and there is no limitation on the material thereof. For example, it may be made of a metal material, or may be made of a plastic material. Further, it may be formed of a material having certain flexibility. According to this structure, the supporting unit 163 can be further provided to stably seal the surface light emitting portion X and the indirect light emitting portion Y, so that the durability and reliability of the lighting device can be improved.

Fig. 4 shows a structure in which a reflecting sheet is added to the lighting apparatus of the present invention shown in Fig.

3 and 4, the reflective sheet 120 of the present invention is formed on a top surface of a printed circuit board 110 and has a structure in which a light emitting unit 130 is formed to pass through. The reflective sheet 120 of the present invention is formed of a material having a high reflection efficiency, thereby reflecting light emitted from the light emitting unit 130 to an upper portion where the diffusion plate 290 is positioned, thereby reducing light loss. The reflective sheet 120 of the present invention may be formed in the form of a film and may include a synthetic resin dispersedly containing a white pigment in order to realize a property of promoting light reflection characteristics and light dispersion. Examples of the white pigment include titanium oxide, aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate and the like. As the synthetic resin, polyethyleneterephthalate, polyethylene naphthalate, acrylic resin, colicarbonate, polystyrene, polyolefin , Cellulosic acid acetate, weather-resistant vinyl chloride, and the like can be used, but the present invention is not limited thereto.

A reflection pattern 121 may be formed on the surface of the reflection sheet 120 and the reflection pattern 221 may scatter light and scatter the incident light to uniformly transmit light to the diffusion plate 290 . The reflection pattern 121 may be formed by printing on the surface of the reflective sheet 120 using reflective ink containing any one of TiO ₂ , CaCo ₃ , BaSo 4, Al ₂ O _{3 ,} Silicon, and Polystyrene But is not limited thereto. In addition, the structure of the reflection pattern 121 may include a plurality of protruding patterns, and may be formed in a prism shape, a lenticular shape, a lens shape, or a combination thereof in order to increase the light scattering effect. It is not. In addition, the cross-sectional shape of the reflection pattern 121 may have a structure having various shapes such as a triangle, a quadrangle, a semicircle, and a sine wave.

Fig. 5 shows a structure in which an optical sheet is added to the illuminating device of the present invention shown in Fig. Hereinafter, an optical sheet is described as being added to the structure shown in FIG. 4, but this is merely an example, and an optical sheet may be added to the illuminating device shown in FIG. 3, which is a structure without a reflective sheet.

3 to 5, the illumination apparatus of the present invention is formed between a resin layer 150 and a diffuser plate 290 and includes a first optical sheet 170 formed on a resin layer upper surface 150, A second optical sheet 190 formed on the sheet 170 and an adhesive layer 180 formed between the first optical sheet 170 and the second optical sheet 190, A second spacing portion 181 may be further formed. That is, the adhesive layer 180 forms a space (second spacing portion) 181 spaced around the optical pattern 183, and an adhesive material is applied to the other portions to form the first optical sheet 170 and the second optical sheet 183, (190) to each other. Further, an optical pattern 183 may be further formed on the upper surface of the first optical sheet 170 or on the lower surface of the second optical sheet 190, and one or more additional optical sheets may be additionally formed on the second optical sheet 190 It is also possible to do. The structure including the first optical sheet 170, the second optical sheet 190, the adhesive layer 180 and the optical pattern 183 can be defined as the optical pattern layer A. [

The optical pattern 183 may be formed as a light shielding pattern formed to prevent the light emitted from the light emitting unit 130 from concentrating. For this purpose, the optical pattern 183 may be arranged between the optical pattern 183 and the light emitting unit 130 And the first optical sheet 170 and the second optical sheet 190 are bonded to each other by using the adhesive layer 180 for securing the fixation force.

The first optical sheet 170 and the second optical sheet 190 can be formed using a material having a high light transmittance. For example, PET can be used.

The optical pattern 183 disposed between the first optical sheet 170 and the second optical sheet 190 basically functions to prevent the light emitted from the light emitting unit 130 from being concentrated. The optical pattern 153 may be formed in a light-shielding pattern so that a light-shielding effect can be realized in order to prevent the phenomenon that the light is excessively strong in strength and the optical characteristics are deteriorated or the yellow light is yellowish. The pattern may be formed by performing a printing process on the upper surface of the first optical sheet 170 or the lower surface of the second optical sheet 190 using light shielding ink.

The optical pattern 183 is not a function to completely block the light, but can be implemented so that the light shielding degree and the diffusing degree of the light can be controlled by one optical pattern so as to perform a function of partial shielding and diffusion of light. Furthermore, more particularly, the optical pattern 183 according to the present invention may be implemented with a superimposed printing structure of a complex pattern. The structure of superimposed printing refers to a structure in which one pattern is formed and another pattern is printed on the pattern.

For example, when the optical pattern 183 is implemented, at least one selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , and Silicon is formed on the lower surface of the polymer film (for example, the second optical sheet) A light-shielding pattern formed by using a light-shielding ink including a diffusion pattern formed using a light-shielding ink containing a substance and a mixed material of Al or Al and TiO ₂ . That is, it is also possible to form a diffusion pattern on the surface of a polymer film by white printing, and then form a light-shielding pattern thereon or a double structure in the reverse order. Of course, it will be obvious that the formation design of such a pattern can be variously modified in consideration of light efficiency, intensity, and shading ratio. Alternatively, it is also possible to form a light-shielding pattern, which is a metal pattern, in the middle layer in a sequential laminated structure, and to form a triplet in which a diffusion pattern is formed on the upper and lower portions, respectively. In such a triple structure, the above-mentioned materials can be selected and implemented. As a preferable example, one of the diffusion patterns is realized by using TiO ₂ having excellent refractive index, and CaCO ₃ having excellent light stability and color is used together with TiO ₂ The light diffusing pattern can be realized and the light efficiency and homogeneity can be ensured through the triple structure which realizes a light shielding pattern by using Al which is excellent in concealment. Particularly, CaCO ₃ functions to reduce the exposure of yellow light and finally realize white light. Thus, it is possible to realize light with more stable efficiency. In addition to CaCO ₃ , particles such as BaSO ₄ , Al ₂ O ₃ , It is also possible to utilize inorganic materials having a large size and a similar structure. In addition, it is preferable that the optical pattern 183 is formed by adjusting the pattern density so that the pattern density becomes lower as the distance from the LED light source emission direction increases.

The adhesive layer 180 has a structure that surrounds the periphery of the optical pattern 183 and forms a second spacing portion 181 in the other portion or a structure in which the second spacing portion 181 is formed in the periphery of the optical pattern 183 So that the two optical sheets can be adhered to each other to form an array. In other words, the adhesive structure of the first optical sheet 170 and the second optical sheet 190 can also realize the function of fixing the printed optical pattern 183.

At this time, the adhesive layer 180 may be a thermosetting PSA, a thermosetting adhesive, or a UV cured PSA type material, but is not limited thereto.

The first spacing portion 280 may be formed between the second optical sheet 190 and the diffusion plate 170 in the description of FIG. 3, The uniformity of the light supplied to the plate 290 can be increased and consequently the uniformity of the light diffused and emitted through the diffuser plate 290 can be improved. At this time, in order to minimize the deviation of light transmitted through the resin layer 150, the thickness H1 of the first spacing part 280 may be formed in a range of 0 to 20 mm, but not limited thereto, It is possible to appropriately change the design as described above in the description of FIG.

Although not shown in the drawings, it is described above that at least one optical sheet may be additionally formed on the optical pattern layer A as necessary.

6 is an image showing the actual operating state of the lighting apparatus according to the present invention.

Referring to FIG. 6, it can be seen that the light emitted from the light emitting unit of the surface emitting portion X is converted into the surface light emission and is emitted to the outside, and the indirect light emitting portion Y is illuminated by the flare And the indirect indirect light is emitted to the outside. That is, according to the present invention, indirect light having a predetermined shape can be realized without addition of a light emitting unit, and it can be confirmed that various lighting effects can be realized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that many suitable modifications and variations are possible in light of the present invention. Accordingly, all such modifications and variations as fall within the scope of the present invention should be considered.

X: Cotton miner
Y: indirect light emitting portion
110: printed circuit board
120: reflective sheet
121: reflection pattern
130: Light emitting unit
150: Resin layer
151: Bead
160: indirectly emitting air gap
161: light reflection unit
163: Supporting unit
170: first optical substrate
180: Adhesive layer
181: second separation part
183: Optical pattern
190: second optical substrate
280: first separator
290: diffusion plate

Claims (23)

A surface emitting portion including at least one light emitting unit on a printed circuit board and a resin layer for embedding the light emitting unit on the light emitting unit;
An indirect light emitting unit spaced apart from the surface light emitting unit and reflecting the light emitted from the light emitting unit; / RTI >
Wherein at least one of the side face and the side face of the face light-
An indirect light emitting air gap is provided between the side of the face light emitting portion and the light reflection unit,
Wherein the light reflection unit is at least the height of the upper surface of the resin layer.
delete The method according to claim 1,
The light reflection unit includes:
A lighting device comprising a white pigment or metal.
The method according to claim 1,
Further comprising: a light reflection unit outer side surface and a support unit below the surface light emission unit.
The method according to claim 1,
The face light-
And a diffusion plate on the upper side of the resin layer.
The method of claim 5,
Wherein the printed circuit board is a flexible printed circuit board.
The method of claim 5,
The light-
A lighting device comprising a side view type light emitting diode.
The method of claim 5,
And a first spacing between the resin layer and the diffuser plate.
The method of claim 8,
Wherein the first spacing is in the range of greater than 0 to 20 micrometers.
The method of claim 5,
And a reflective sheet on said printed circuit board.
The method of claim 10,
And a reflection pattern on the reflection sheet.
The method of claim 11,
Wherein the reflective pattern comprises a reflective ink comprising any one of TiO ₂ , CaCo ₃ , BaSo ₄ , Al ₂ O _3, Silicon, and PS.
The method of claim 5,
And a first optical sheet for dispersing light on an upper portion of the resin layer.
14. The method of claim 13,
And a second optical sheet on the first optical sheet.
15. The method of claim 14,
And an adhesive layer between the first optical sheet and the second optical sheet.
16. The method of claim 15,
The adhesive layer
A thermosetting PSA, a thermosetting adhesive, and a UV cured PSA type material.
18. The method of claim 16,
Wherein the adhesive layer comprises a second spacing.
15. The method of claim 14,
And an optical pattern that shields or reflects light on the upper surface of the first optical sheet or the lower surface of the second optical sheet.
19. The method of claim 18,
In the optical pattern,
A diffusion pattern including a light shielding ink containing at least one material selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , and Silicon,
Wherein the light-shielding pattern including the light-shielding ink containing Al or a mixed material of Al and TiO ₂ has an overlapping structure.
The method of claim 19,
Wherein the diffusion pattern
And the light-shielding pattern is printed on at least one of the upper surface and the lower surface of the light-shielding pattern.
The method according to any one of claims 5 to 20,
Wherein the resin layer comprises:
An ultraviolet curing resin comprising an oligomer.
23. The method of claim 21,
The oligomer,
And a material selected from the group consisting of Urethane Acrylate, Epoxy Acrylate, polyester Acrylate, and Acrylic Acrylate.
23. The method of claim 21,
Wherein the resin layer comprises:
And further comprising a bead made of any one selected from the group consisting of silicon (sillicon), silica (silla), glass bubble, PMMA, urethane, Zn, Zr, Al ₂ O ₃ , .

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