KR20160008141A - Light device - Google Patents

Abstract

The present invention provides a lighting device which comprises: an optical member including a protrusion optical pattern forming a gap between an adjacent layer and the protrusion optical pattern; at least one light emitting unit inserted into the optical member; and a resin layer formed on the optical member and at least one light emitting unit. Therefore, a variety of protrusion optical patterns are formed to obtain an effect of changing the shape of light according to a viewing angle at which a light source is seen, an effect of reducing the entire thickness, and an effect of increasing a design freedom degree in case of product design by obtaining flexibility.

Description

Light device

Embodiments of the present invention relate to the field of illumination devices. More specifically, the present invention relates to a lighting device, and more particularly, to a light emitting device having a structure in which a light guiding plate structure is removed to thin a whole thickness, to secure a light efficiency and to form a protruding optical pattern, To a lighting device structure capable of realizing a lighting device.

The LED (Light Emitted Diode) device is a device that converts electric signals into infrared rays or light using compound semiconductor characteristics. Unlike fluorescent light, unlike harmful substances such as mercury, it does not cause environmental pollution, 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.

The light guide plate is basically used as an essential part of the conventional lighting device. However, since the thickness of the light guide plate itself can not be reduced due to the thickness of the light guide plate itself, the light guide plate itself is not flexible, Which is difficult to apply, and thus the product design and design modification are not easy.

The embodiments of the present invention have been proposed in order to solve the above-mentioned conventional problems, and it is possible to provide a lighting device structure capable of thinning the entire thickness.

In addition, embodiments of the present invention can provide a lighting device structure capable of securing reliability while improving the degree of freedom in product design by allowing the lighting device itself to have flexibility on the upper part of the printed circuit board or the lower part of the optical member.

In addition, in the embodiment of the present invention, it is possible to provide a lighting apparatus capable of implementing a geometrical light pattern.

An illumination device of an embodiment for solving the above-mentioned problems includes an optical member including a projecting optical pattern for forming an adjacent layer and a gap; At least one light-emitting unit inserted into the optical member; And a resin layer formed on the optical member and the at least one light emitting unit; And < / RTI >

According to the embodiment of 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 embodiment of the present invention, flexibility can be secured by forming the lighting device using the flexible printed circuit board and the resin layer, thereby improving the degree of freedom in product design.

In addition, according to the embodiment of the present invention, by providing the optical member having the protruding optical pattern formed between the resin layer and the reflecting member, the effect of changing the shape of the light and the three-dimensional effect according to the viewing angle, An effect that the shape of the protruding optical pattern can be deformed, an effect of providing an illumination device with improved aesthetics, and an advantage of being applicable to various kinds of illumination devices.

According to the embodiment of the present invention, by providing the reflective member and the reflective pattern, which are structures that can efficiently reflect the light emitted from the light emitting unit, it is possible to maximize the luminance improvement as well as increase the reflectance of light, There is an effect that a light source can be provided.

In addition, according to the embodiment of the present invention, the first optical substrate or the second optical substrate having the optical pattern is formed, and the adhesive layer is provided with the spacing portion where the air layer is formed. Thus, generation of hot spots occurring in the light- It is possible to secure the reliability between the parts to be adhered to the adhesive layer and to realize an illumination device having no significant difference in optical characteristics and to align the components precisely.

1 shows a main part of a lighting apparatus according to the present invention.
Fig. 2 shows a structure in which a bead and an optical member are added to the illumination apparatus of the embodiment shown in Fig.
Fig. 3 shows a structure in which an optical member and an optical sheet are added to the illuminating device of the embodiment shown in Fig.
FIG. 4 is a schematic view showing a structure of a lighting device according to the present invention applied to a headlight for a vehicle.
Figure 5 shows an actual operating state image of a lighting device according to the 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 an illumination device using an LED as a light source as a light emitting unit, and it is an object of the present invention to provide an illumination device in which a light guide plate is removed and replaced with a resin layer, and an optical member having a protruding optical pattern is further provided between the reflective member and the resin layer, It is an object of the present invention to provide a structure of a lighting apparatus which can be applied to various applications by realizing a geometrical shape rather than a light emission.

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 embodiment can be applied to the backlight unit field applied to the liquid crystal display device, and it can be applied to all the illumination related fields which are currently developed and commercialized or can be implemented according to the future technology development.

3 shows a main part of a lighting apparatus according to an embodiment of the present invention.

3, the illumination device 100a according to the embodiment includes an optical member 210 including an optical pattern and at least one light emitting unit 130 inserted into the optical member 210, . That is, the light emitting unit 130 may have a structure that passes through the optical member 210 and has an arrangement structure with the light emitting unit 130. The optical member 210 may further include a resin layer 150 formed on the at least one light emitting unit 130.

Referring to FIG. 3, the structure of a lighting apparatus according to an embodiment of the present invention, which is implemented with the basic structure as a center, will be described. In the embodiment of the present invention, a printed circuit board 110 for mounting the light emitting unit 130 As shown in FIG.

Specifically, the lighting apparatus according to an embodiment of the present invention includes at least one light emitting unit 130 formed on the printed circuit board 110, and a structure in which the light emitting unit 130 is inserted, And a resin layer 150 for embedding the light emitting unit 130 and guiding the emitted light forward. The optical member 210 includes a protruding optical pattern.

And may further include a reflective member 120 formed on the printed circuit board 110. The optical member 210 includes means for performing an optical action, and may include, for example, a light guide, a lens, a wave guide, and the like. 1, the optical member 210 according to one embodiment is shown as a structure having a laminate structure of two or more layers, but is not limited thereto.

The printed circuit board 110 may be a flexible printed circuit board (FPCB) in order to secure certain flexibility in the present invention.

The light emitting units 130 are arranged on the flexible printed circuit board 110 in at least one number and emit light. The light emitting unit 130 of the embodiment may be a side view type light emitting diode have. In the case of using the side light emitting diode, the luminous intensity of the light emitted from the light emitting unit 130 ) Can be thinned, and the uniformity of light of the light emitting surface of the flat plate structure can be secured through the resin. That is, when the top-emitting type LED is used, the direction of the light is upward. In this case, the range of the light spreading around the LED is narrow, and the side-type LED has a wide spread light, The light emitting diode 130 of the embodiment is used as the light emitting unit 130 according to the embodiment of the present invention. .

In addition, when the light emitting unit according to the exemplary embodiment of the present invention is embedded in the resin layer and the light emitting unit is embedded in the resin layer, the resin layer and the light emitting unit are integrally formed The structure is simplified. When a light emitting device such as an LED used as a light emitting unit is applied, the refractive index of the phosphor layer disposed in front of the LED light emitting device is different from that of the resin layer. That is, The amount of light emitted from the light source is increased.

Specifically, considering that the refractive index of the phosphor silicon is usually 1.5 and the refractive index of the resin layer is usually 1.47, the smaller the difference in refractive index of the medium through which the light passes, the greater the critical angle. As a result, And the amount of light can be secured.

In addition, when the light emitting unit is formed with a structure in which a resin layer is inserted, the thickness of the entire illumination device can be made relatively thin compared to the conventional structure in which the light guide plate is disposed on the upper surface, And the light emitting efficiency can be increased by reducing the light leakage amount.

In addition, the lighting apparatus 100a according to the embodiment of the present invention is arranged such that the light emitting unit 130 composed of the side light emitting diode is disposed directly under the light emitting unit, It is possible to reduce the total number of the light emitting units, and the total weight and thickness of the lighting apparatus can be innovatively reduced.

The resin layer 150 is formed on the optical member 210 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 has a structure for embedding the light emitting unit 130, thereby performing a function of dispersing light emitted in a lateral direction in the light emitting unit 130.

The resin layer 150 of this embodiment can be basically made of a resin capable of diffusing light. For example, the resin layer 150 of the embodiment may be made of a self-hardening 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 an isobornyl acrylate (IBOA), hydroxypropyl acrylate (HPA), 2-hydroxyethyl acrylate, or the like, which is a low boiling point diluent type reactive monomer. 1-hydroxycyclohexyl phenyl-ketone, etc.) or an antioxidant. However, the above description is merely an example, and the resin layer 150 of the embodiment can be formed with a suitable resin capable of performing a light diffusion function, which is currently developed and commercialized or can be implemented according to future technology development something to do.

According to the embodiment of the present invention, since the presence of the resin layer 150 can reduce the thickness of the conventional light guide plate, the thickness of the entire product can be reduced, An advantage of being easily applied to the curved surface of the bar, an advantage of improving the freedom of design, and an advantage of being applicable to other flexible displays.

The reflective member 120 is formed on the upper surface of the printed circuit board 110 and has a structure in which the light emitting unit 130 is inserted. The reflective member 120 of this embodiment is formed of a material having a high reflection efficiency, so that the light emitted from the light emitting unit 130 is reflected upward to reduce light loss. The reflective member 120 may be formed in a film form, and may include a synthetic resin dispersedly containing a white pigment in order to realize a property of reflecting light and promoting dispersion of light. 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 , Cellulose acetate, weather-resistant vinyl chloride, and the like can be used, but are not limited thereto.

A reflective pattern 121 may be formed on the surface of the reflective member 120. The reflective pattern 121 may scatter and scatter incident light to uniformly transmit light to the upper surface. The reflection pattern 121 may be formed by printing on the surface of the reflective member 120 using reflective ink including any one of TiO ₂ , CaCo ₃ , BaSo ₄ , Al ₂ O _{3 ,} Silicon, and PS, It is not.

Particularly, when the reflective pattern 121 is implemented by a printing method using reflective ink, it is easy to design an optical pattern considering the portion where the reflectance should be increased or the portion to be lowered due to the arrangement of the light source, It is easy to implement a desired reflection pattern by applying a method such as superimposed printing (2 degrees, 3 degrees printing) as well as printing of a pattern of 1 degree. In addition, when the reflection ink containing the metallic material is applied, the reflection efficiency is higher than that of the reflection pattern on the structural side where the reflection characteristic is realized as a general protrusion structure.

The reflective pattern 121 has a structure having a plurality of protruding patterns. In order to increase the scattering effect of light, a dot pattern shape, a prism shape, a lenticular shape, a lens shape, But the present invention is not limited thereto. 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.

The optical member 210 may be disposed on an upper surface of the reflective member 120 and may have an optical pattern formed on a surface thereof facing the reflective member 120. This causes a resin layer to be formed on the reflective member 120. When the protruding pattern of the optical pattern is raised, there is a problem that the resin enters between the patterns of the prism pattern and the function of the pattern is lost Lt; / RTI >

In addition, when the optical pattern is formed on the surface in contact with the reflecting member, the light reflected by the reflecting member can be directly scattered by the optical pattern, thereby achieving an advantageous effect in terms of light utilization efficiency.

It is preferable that the optical pattern of the optical member 210 is formed on the surface opposite to the surface in contact with the resin layer 150.

The optical member 210 may be a prism sheet having a plurality of unit prism lens patterns, a microlens array sheet or a lenticular lens sheet, or a combination thereof. The difference in the lens pattern of the optical member described above is significant in that it has an advantage of being able to design variously the characteristics of forming the light exit path of the three-dimensional structure according to the embodiment of the present invention.

A gap 230 is formed between the optical member 210 and the reflective member 120 by the optical pattern or an adhesive pattern 220 is formed in a shape corresponding to the optical pattern, The member 210 and the reflecting member 120 are bonded. According to the embodiment, the adhesive pattern 220 is formed on the reflective member 120. A gap 230 formed as an air layer is not formed at a portion where the adhesive pattern 220 is formed. Particularly, in this case, when the entire surface is adhered by using the double-sided adhesive agent without the air layer, the appearance is contaminated and the three-dimensional feeling can be enhanced by the air layer. In addition, the portion where the adhesive pattern is present has a difference in refractive index compared to the portion where the air layer is formed in the portion where the adhesive pattern does not exist, in addition to the adhesive effect. In this case, Advantages can be realized.

By providing the optical member 210 such as a prism sheet on which an optical pattern is formed, rather than a simple surface light emission, a geometrical light pattern can be formed to realize the effect of changing the shape of the light and the stereoscopic effect according to the viewing angle.

In this case, the intensity of light can be controlled by forming a pattern using reflective ink on the reflective member 120, and the shape of the protruding optical pattern can be controlled by using the adhesive pattern 220 between the reflective member 120 and the optical member 210. [ . ≪ / RTI >

Fig. 2 shows a structure 100b in which a bead and an optical member are added to the illuminator of the embodiment shown in Fig.

 Referring to FIGS. 1 and 2, the resin layer 150 of the embodiment of the present invention may further include a plurality of light diffusers 151 having hollow (or voids) formed therein mixed and diffused therein , And the light diffuser 151 serves to improve reflection and diffusion characteristics of light. For example, when the light emitted from the light emitting unit 130 is incident on the light diffusing body 151 inside the resin layer 150, the light is reflected and transmitted by the hollow of the light diffusing body 151, And is emitted to the upper portion of the resin layer. The light diffusing body 151 may be embodied as a bead structure, for example.

The illumination device 100b according to an embodiment of the present invention shown in FIG. 2 may further include a second optical member 290 above the resin layer 150.

2, the light diffused and condensed in the resin layer is incident on the second optical member 290, and the second optical member 290 is incident on the second optical member 290. In the case where the second optical member 290 is present in the illuminating device according to the embodiment of the present invention, The reflectance and diffusivity of light are increased by the light diffuser 151 and the amount and uniformity of the outgoing light to be supplied to the second optical member 290 is improved in the future, It is possible to obtain an effect of improving the performance of the system.

The second optical member 290 includes means for performing an optical action, and may include, for example, a light guide, a lens, a light diffusion layer, and the like. In Fig. 2, the second optical member 290 according to one embodiment is shown as a light-diffusing layer, but is not particularly limited thereto.

Further, the content of the light diffusing body 151 may be appropriately adjusted in order to obtain a desired light diffusion effect. More specifically, the amount of the light diffusing body 151 may be adjusted within a range of 0.01 to 0.3% It is not. That is, light emitted laterally from the light emitting unit 130 is diffused and reflected through the resin layer 150 and the light diffusing body 151, and is allowed to proceed in the upward direction. The light diffusing body 151 may be formed of any one selected from the group consisting of sillicon, silica, glass bubble, PMMA, urethane, Zn, Zr, Al ₂ O ₃ , When the light diffusing body 151 has a bead structure, the particle size of the bead may be in the range of 1 탆 to 20 탆, but the present invention is not limited thereto.

The illumination device 100b according to the embodiment of the present invention may be formed with a structure that further includes the second optical member 290 as described above. In this case, the second optical member 290 is formed on the resin layer 150 and functions to condense the light emitted through the resin layer 150. The second optical member 290 may be formed of an acrylic resin, but is not limited thereto. The second optical member 290 may be made of acrylic, polycarbonate (PC), polystyrene (PS), polymethylmethacrylate (PMMA) It may be made of any material that can perform the condensing function, such as high permeability plastic such as poly (COC), polyethylene terephthalate (PET), and resin.

Although not shown in the drawing, a reflection pattern may be formed on the lower portion of the second optical member 290. The reflection pattern means a structure in which the patterns are uniformly or non-uniformly arranged. The reflection pattern reflects and disperses the incident light so that the light emitted to the outside serves as a geometrical pattern. The reflection pattern is formed of a plurality of patterns. The reflection pattern may be a prism shape, a lenticular shape, a concave lens shape, a convex lens shape, or a combination thereof in order to increase the reflection and dispersion effect of light. It is not. In addition, the cross-sectional shape of the reflection pattern may be a structure having various shapes such as a triangle, a quadrangle, a semicircle, and a sine wave. And the size or density of each pattern may be changed according to the distance from the light-emitting unit 130.

The reflection pattern of this embodiment can be formed by directly processing the second optical member 290, but there is no limitation thereon, and a reflective pattern having a predetermined pattern is attached to the second optical member 290, It can be formed in all the ways that can be implemented according to the future technology development.

A first spacing 280 may be provided between the second optical member 290 and the resin layer 150 to separate them from each other. The uniformity of the light supplied to the second optical member 290 can be increased due to the presence of the first spacing portion 280 and the uniformity of the light emitted through the second optical member 290 ), And an effect of realizing uniform surface emission can be obtained. Meanwhile, in order to minimize a deviation of light transmitted through the resin layer 150, the thickness H1 of the first spacing part 280 may be in a range of more than 0 mm and 20 mm. When the thickness of the first spacing portion is 0, there is no spacing portion. When the thickness of the first spacing portion is more than 20 mm, the amount of light is reduced and it becomes difficult to secure reliability as an illumination device.

Fig. 3 shows a structure 100c in which a second optical member and an optical sheet are added to the illuminator of the embodiment shown in Fig.

1 to 3, an illumination apparatus 100c according to an embodiment of the present invention is formed between a resin layer 150 and a second optical member 290, 1 optical sheet 170 and a second optical sheet 190 formed on the first optical sheet 170 and an adhesive layer 180 formed between the first optical sheet 170 and the second optical sheet 190 And a second spacing portion 181 may be further formed on the adhesive layer 180. 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 portion to form a first optical sheet 170 and a second optical sheet And the sheet 190 may be bonded 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. [ In the case of forming the second optical sheet 190 in a multilayer structure in relation to the first optical sheet 170, an air layer is formed in the periphery of the optical pattern, so that light passing through the resin is scattered by the air layer having a different refractive index In the case of the adhesive layer, when it is formed as a spacer that forms the air layer and surrounds the periphery of the optical pattern, the light shielding effect realized by the optical pattern is realized And the diffusion of light occurs at the peripheral portion. Further, in the absence of an air layer, the light shielding effect is remarkably deteriorated.

The optical pattern 183 formed on the upper surface of the first optical sheet 170 or the lower surface of the second optical sheet 190 may be a light shielding pattern formed to prevent the light emitted from the light emitting unit 130 from concentrating. The alignment of the optical pattern 183 with the position of the light emitting unit 130 is required and the first optical sheet 170 is formed using the adhesive layer 180 in order to secure a fixing force after alignment. And the second optical sheet 190 are adhered to each other.

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 183 may be formed as a light shielding pattern so that a light shielding effect can be realized to prevent a phenomenon in which 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 of completely blocking light, but can be implemented so that light shielding degree or diffusivity of 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.

According to the embodiment of the present invention, in the realization of the optical pattern 183, it is possible to select among TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ and Silicon on the lower surface of the polymer film (for example, the second optical sheet) And a light-shielding pattern formed by using a light-shielding ink containing a mixed material of Al or Al and TiO ₂ . Such an overlapping printing structure of optical patterns is for the purpose of efficiently controlling hot spot phenomenon caused by light emitted from a light source such as an LED or the like and performs a more stable shading effect than a light shielding pattern formed by printing at 1 degree . In addition, since there is a limit in the thickness that can be implemented in the printing process, different pattern shapes are implemented by a plurality of printing processes, and the shape is adjusted according to the distance away from the LED to form a partial thickness difference of the pattern itself, .

That is, it is also possible to form a diffusion pattern on the surface of the polymer film by white printing, form a light shielding pattern thereon, or form a double structure in the reverse order. In the structure of such a superimposed printing, if a diffusion pattern is formed by white printing and then a light-shielding pattern is printed thereon or a structure opposite thereto, the presence of the diffusion pattern does not completely block the transmitted light , The light filtered by the light shielding pattern can be diffused upward, and the light utilization efficiency can be increased.

Of course, such a pattern formation design can be designed 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, it is possible to select and implement the above-mentioned materials. As a preferable example, one of the diffusion patterns is realized by using TiO ₂ having excellent refractive index, and CaCO ₃ excellent in 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 another portion or a structure that forms a second spacing portion 181 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.

4 may be formed between the second optical sheet 190 and the second optical member 290. The first optical member 190 and the second optical member 290 may be formed of the same material, It is possible to increase the uniformity of the light supplied to the second optical member 290 and consequently to improve the uniformity of the light passing through the second optical member 290. [ 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 the present invention is not limited thereto. The design change is as described above in the description of FIG. The existence of the first spacing allows the light passing through the optical member 150 and the optical pattern layer to once pass through the air layer of the spacing portion and transmit the medium having a different refractive index to increase the diffusion property and scattering property of light And then transmitted through the second optical member to another medium having a different refractive index so as to improve the uniformity of the diffused and scattered light.

The second optical member 290 may be formed into a piece so as to be disposed only above the LED. The LED may be shielded from the outside, thereby improving the appearance of the LED when the light is on / off. Further, a surface emitting effect is produced in the portion where there is no LED.

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.

4 schematically shows a structure in which a lighting device according to an embodiment of the present invention is applied to a headlight for a vehicle.

Referring to FIG. 4, the lighting apparatus 100a according to the present invention is formed using a flexible circuit board and a resin layer, and has a certain flexibility. Accordingly, the headlight housing H can be easily mounted to the headlight housing H for a vehicle in which the curvature is formed as shown in FIG. 6, thereby improving the degree of design freedom of the finished product combined with the housing, The luminance and the illuminance can be secured. In FIG. 4, the illumination device shown in FIG. 1 is mounted, but this is only an example, and the illumination device shown in FIG. 2 or FIG. 3 may be mounted.

Figure 5 shows an actual operating state image at the front, bottom and side of the lighting device according to the invention. Referring to FIG. 5, it can be seen that the shape of the light changes according to the viewing angle of the light source when the protruding optical pattern is implemented.

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.

110: printed circuit board
120: reflective member
121: reflection pattern
130: Light emitting unit
150: Resin layer
151: light diffuser
170: first optical sheet
180: Adhesive layer
181: second separation part
183: Optical pattern
190: second optical sheet
210: optical member
220: adhesive pattern
230: gap
280: first separator
290: second optical member
H: Housing

Claims (20)

Printed circuit board;
An optical member including a protruding optical pattern on the printed circuit board;
At least one light emitting unit on the printed circuit board;
A resin layer disposed on the printed circuit board and in direct contact with the light emitting unit and the optical member; And
A reflective member disposed between the optical member and the printed circuit board;
≪ / RTI >
The method according to claim 1,
Wherein the resin layer comprises:
And the light emitting unit and the optical member are embedded.
The method according to claim 1,
Wherein the optical member comprises:
A prism sheet having a plurality of unit prism lens patterns, a microlens array sheet or a lenticular lens sheet, or a combination thereof.
The method according to claim 1,
In the optical pattern,
And is provided on a surface opposite to a surface in contact with the resin layer.
The method according to claim 1,
Wherein the optical pattern of the optical member comprises:
And is provided on a surface in contact with the reflecting member.
The method of claim 5,
And an adhesion pattern between the optical member and the reflection member.
The method of claim 6,
And a gap adjacent to the adhesive pattern between the optical member and the reflective member.
The method according to claim 1,
Wherein the printed circuit board is a flexible printed circuit board.
The method of claim 7,
And a reflective pattern on the reflective member.
The method of claim 9,
The reflection pattern
TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, and PS.
The method of claim 6,
The illumination device includes:
A second optical member on top of the resin layer;
≪ / RTI >
The method of claim 11,
A first spacing between the resin layer and the second optical member;
≪ / RTI >
The method of claim 12,
Wherein the resin layer and the second optical member are spaced apart from each other by more than 0 to 20 mm.
The method of claim 12,
And a first optical sheet on the upper surface of the resin layer.
15. The method of claim 14,
And a second optical sheet on the first optical sheet.
16. The method of claim 15,
And an adhesive layer between the first optical sheet and the second optical sheet opposed to the first optical sheet.
18. The method of claim 16,
And an optical pattern for shielding or reflecting light on the upper surface of the first optical sheet or the lower surface of the second optical sheet.
18. The method of claim 17,
In the optical pattern,
TiO ₂ , CaCO ₃ , BaSO ₄ , and Silicon,
Wherein the light-shielding pattern including Al or a mixture of Al and TiO ₂ is an overlapping structure.
The method according to claim 1,
Wherein the resin layer comprises:
Wherein the ultraviolet curing resin comprises any one oligomer selected from the group consisting of acrylic acid, acrylic acid, urethane acrylate, epoxy acrylate, polyester acrylate and acrylic acrylate.
The method of claim 19,
Wherein the resin layer comprises:
Further comprising a light diffuser including any one selected from the group consisting of silicon, silica, glass bubble, PMMA, urethane, Zn, Zr, Al2O3, Device.

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