KR20120113178A - Lamp device within resin layer for light-guide and lcd using the same - Google Patents

Abstract

PURPOSE: A lighting device and a liquid crystal display device with the same are provided to efficiently reflect light, which is emitted from a light source, onto a surface of a printed circuit board. CONSTITUTION: A plurality of LED(Light Emitting Diode) light sources(130) are formed on a printed circuit board. A resin layer(140) is laminated on the LED light sources to cover. A reflecting module(200) is formed on the printed circuit board. The reflecting module includes an inclined surface. The inclined surface corresponds to a light emitting direction of the LED light sources.

Description

Lighting device and liquid crystal display device using the same {Lamp device within resin layer for light-guide and LCD using the same}

The present invention relates to a manufacturing process that can reduce the structure of the light guide plate to reduce the structure of the lighting device, to ensure the light efficiency, and to increase the productivity and manufacturing efficiency, and the lighting device manufactured thereby. Furthermore, the present invention relates to a backlight unit, a liquid crystal display device, and a vehicle lamp device using the above-described lighting device.

A device for implementing illumination by guiding light emitted from a light source is variously required in an illumination lamp, a vehicle lamp, a liquid crystal display, and the like. In such a lighting device, the technique of thinning the structure of the equipment and the structure of increasing the light efficiency are recognized as the most important technologies.

An example in which the lighting device is applied will be described below with reference to a liquid crystal display.

A liquid crystal display (LCD) is a display device that can control a desired image by individually supplying data signals according to image information to pixels arranged in a matrix form and adjusting light transmittance of the pixels. Since it does not emit light, it is designed to display an image by installing a lamp device on its back.

Referring to FIG. 1, such a lamp device 1 has a flat light guide plate 30 disposed on a substrate 20, and a plurality of side-shaped LEDs 10 (only one of which is shown on the side of the light guide plate 30). ) Is arranged in the form of an array.

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 LCD panel 50 on the upper side. Such a lamp device includes a diffusion sheet 31, a prism sheet 32, 33, a protective sheet 34, and the like between the light guide plate 30 and the LCD panel 50, as illustrated in FIG. 2. It may be formed of a structure that further adds a plurality of optical sheets.

The lamp device illuminates the light evenly so that the display image can be seen on the back of the LCD which does not emit light by itself, and the light guide plate performs the brightness and uniform illumination function of the lamp device. It is one of the plastic molded lens that uniformly transmits the light emitted from the light source (LED) to the whole LCD surface. Therefore, such a light guide plate is basically used as an essential component of such a lamp device, but this shows a limitation in that the overall thickness of the product can be reduced due to the thickness of the light guide plate itself. In this case, the image quality is deteriorated.

The present invention has been made to solve the above-described problem, an object of the present invention is to form a reflection module which is a structure capable of efficiently reflecting the light emitted from the light source on the surface of the printed circuit board to improve the reflectance of the light and brightness It is to provide a lighting device that can maximize the improvement.

In addition, by removing the light guide plate essential to the structure of the lighting device, and by forming a structure that induces the light source using a film-type resin layer, the number of light sources can be reduced, the overall thickness of the lighting device is reduced, and the product design It is another object of the present invention to provide a reliable product that can increase the degree of freedom.

As a means for solving the above problems, the present invention is a plurality of LED light source formed on a printed circuit board; A resin layer laminated in a structure covering the LED light source; And a reflection module formed on the printed circuit board and having an inclined surface corresponding to the light output direction of the light source.

In addition, in the above-described structure of the present invention, the reflection module may be implemented such that an angle formed by the horizontal incident path of the light emitted from the light source and the inclined surface forms an acute angle or an obtuse angle.

In addition, the reflective module according to the present invention can be implemented in a three-dimensional shape having a base surface; and the inclined surface formed with an inclination angle on one side or both sides of the base surface. In particular, in this case, the three-dimensional vertical section may be implemented in a triangle, trapezoid, semicircle, semi-ellipse, and slope.

In any case, the reflective module according to the present invention can be implemented in a structure in which a reflective layer is coated on the inclined surface.

In addition, the reflective module may further include a plurality of reflective patterns formed on the reflective layer.

In addition, the reflective pattern, TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O _{3 It} can be implemented as a pattern printed with a reflective ink containing any one of, Silicon, PS.

The height of the reflective module according to the present invention is preferably formed to be less than the height of the resin layer.

In addition, the lighting apparatus of the present invention, the LED light source penetrates between the resin layer and the printed circuit board is laminated, and may further include a reflecting unit having an air (air) region formed therein. have.

The reflective unit may include a first reflective film that is in close contact with the surface of the printed circuit board, and a second reflective film that is formed of a transparent material spaced apart from the first reflective film by an adhesive pattern material to form the air region. Can be. In addition, the second reflective film may be implemented in a structure in which a reflective pattern is further formed on the surface of the second reflective film.

The lighting apparatus according to the present invention having the above-described structure may further include an optical pattern layer disposed on the resin layer to implement an optical pattern for diffusing light, and in this case, the optical pattern layer may include A first substrate and a second substrate including an optical pattern therein may be provided, and an adhesive material may be applied to a portion other than the second air region surrounding the periphery of the optical pattern. In this case, the optical pattern may be formed of a material including any one or more materials selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, and PS.

The lighting apparatus according to the present invention may be configured to further include a diffuser plate disposed on the optical pattern layer, or further include a third air region disposed between the optical pattern layer and the diffuser plate. Can be.

The lighting apparatus according to the present invention may include a light emitting diode (LED) formed on the above-described printed circuit board and a resin layer stacked in a structure covering the light emitting diode (LED).

According to the present invention, by forming a reflection module which is a structure capable of efficiently reflecting the light emitted from the light source on the surface of the printed circuit board has the effect of improving the reflectance of the light and maximize the brightness enhancement.

In particular, the number of light sources can be reduced, the overall thickness of the lighting device can be reduced, and the product design can be reduced by removing the light guide plate essential for the general lighting device structure and forming a structure that induces a light source using a film type resin layer. It is effective to increase the degree of freedom.

In addition, when the reflective module and the element of the resin layer according to the present invention further includes a reflecting unit having an air region, it is possible to further improve the luminance and improve the luminance, without increasing the thickness of the lighting device or the number of light sources. Also, due to the pattern design of the spacer forming the air region, there is an effect of maximizing the control and the reflection effect of the light.

In addition, the present invention forms an optical pattern layer having an optical pattern, but by patterning the adhesive material (adhesive pattern layer) to provide an air region, it is possible to eliminate the occurrence of hot spots and dark areas generated in the light shielding pattern portion. In addition, the reliability between the adhesive material and the parts to be bonded can be secured, and at the same time, the lighting device can be realized without a significant difference in optical characteristics, and a dense arrangement between the parts can be achieved.

In particular, by mounting the side-type light emitting diode in a direct type, it is possible to secure the optical characteristics while significantly reducing the number of light sources, and can be applied to the structure of the flexible display by removing the light guide plate, and a reflective film including a reflective pattern in the resin layer And it is also provided with a diffuser plate including an air layer has the effect of ensuring a stable light emission characteristics.

1 and 2 relates to the structure of a conventional lighting device.
3 is a cross-sectional conceptual view showing main parts of a lighting apparatus according to the present invention.
4 illustrates various embodiments of a reflection module disposed inside the lighting apparatus according to the present invention described with reference to FIG. 3.
5, 6A, and 6B illustrate the results of simulating the presence or absence of luminance change according to the shape and height of the reflection module after the arrangement of the LED light source on the printed circuit board having the reflection module according to the present invention.
7 is a cross-sectional conceptual view showing a lighting apparatus as another embodiment according to the present invention.
8 is a cross-sectional conceptual view showing a lighting apparatus as still another embodiment according to the present invention.
9 is a cross-sectional conceptual view showing the structure of another embodiment according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. Terms such as first and second 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 present invention is to provide a lighting device to improve the reflectance and brightness by providing a reflection module having an inclined surface corresponding to the light output direction of the LED light source in the lighting device using the LED as a light source. In addition, in particular, the light guide plate is removed and formed into a resin layer to provide a structure that can innovatively reduce the overall thickness of the lighting device and reduce the number of light sources.

In addition, the illumination device according to the present invention is not limited to being applied to the backlight unit of the above-described liquid crystal display device. That is, the present invention is applicable to a variety of lamp devices requiring illumination, such as a vehicle lamp, a home lighting device, and an industrial lighting device. The automotive lamp can also be applied to headlights, indoors, lighting, and rear lights.

1. First Embodiment

3 is a cross-sectional conceptual view showing main parts of a lighting apparatus according to the present invention.

Referring to FIG. 3, the lighting apparatus according to the present invention includes a plurality of LED light sources 130 formed on a printed circuit board 110, a resin layer 140 stacked in a structure covering the LED light source 130, and in particular, It is formed on the printed circuit board 110, characterized in that it comprises a reflective module 200 having an inclined surface corresponding to the light output direction of the light source. In particular, when considering the horizontal traveling path of the light emitted from the LED light source 130, the reflective module 200 may consider a three-dimensional structure having an inclined surface that can be incident with a predetermined slope as a preferred embodiment.

In addition, the present invention includes a resin layer 140 to remove the light guide plate in the structure of the conventional lighting device, and guide the light emitted from the light source 130 toward the front, in particular by implementing a reflective module on the resin layer It is possible to further enhance the reflectance of the light. That is, the resin layer 140 is stacked in a structure surrounding the LED light source 130 and serves to disperse light of the light source emitted laterally. That is, the function of the conventional light guide plate may be performed in the resin layer 140.

That is, as shown in FIG. 3, the plurality of LED light sources formed on the printed circuit board 110 may use LEDs having a side view LED structure, in which case the plurality of LEDs are aligned. In the structure, light emitted from the light exit surface 131 may be incident and reflected on the inclined surface 210 of the reflective module 200. Therefore, the inclined surface of the reflective module according to the present invention described below is defined as a concept encompassing all the structures having various inclination bends and inclinations except for a structure in which the light emitted from the light source and the inclined plane vertically collide.

In addition, by adjusting the inclination angle (θ) of the reflection module 200 of Figure 3 it is possible to adjust the reflectance in various ways, it is possible to improve the brightness or to correct the uniformity.

In addition, a reflective layer 210 such as Ag may be formed on a surface of the reflective module 200 according to the present invention. Furthermore, an intaglio or embossed reflective pattern may be implemented on the reflective layer 210. In the present exemplary embodiment, the reflective pattern may be printed using a reflective ink including any one of TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, and PS.

In the present invention, in order to improve the reflectance of the light in addition to the reflective module 200, the reflective film 121 is formed on the surface of the printed circuit board 110, the reflective pattern is also implemented on the reflective module on the reflective film 121 It is also possible to form The reflection pattern is preferably formed in the light exit direction of the LED light source, and in particular, the pattern may be arranged so that the pattern density increases as the distance from the LED light source exits. When the LED of the side-emitting type structure is implemented, an advantage of greatly reducing the number of light sources is realized.

4 illustrates various embodiments of the reflection module 200 disposed inside the lighting apparatus according to the present invention described with reference to FIG. 3.

The reflective module 200 according to the present invention may be applied to any structure having an inclined surface having a slope so that the light emitted from the light source may be reflected and re-reflected on the inclined surface.

For example, as illustrated in FIG. 4A, a triangular prism structure may be implemented in a structure in which two inclined surfaces are inclined and abutted with both sides of the base surface 230 having a predetermined inclination θ.

The base surface 230 is in close contact with the printed circuit board 110, and the inclined surface 210 corresponds to a portion in which the light is emitted from the light source. As described above, the reflectance may be adjusted by adjusting the inclination θ, thereby minimizing the loss of light and improving luminance.

The right image of (a) of FIG. 4 shows a vertical cross-sectional view of the above-described triangular prism reflective module, which has a triangular structure and is one when considering the virtual coordinate axis (x, y axis) as shown. The inclined surface of has a straight line structure (y = ax + b, a, b is a real number, a ≠ 0).

4B is a structure in which the inclined surface has a constant curvature, and considering the cross section, the trace 240 of the inclined surface has a parabolic structure (y = ax ² + b, a and b are real numbers, a ≠ 0). do. Such a parabolic structure is a concept including a curve having various curvatures as described above in addition to the curvature according to this formula.

That is, as in the structure shown in (c), the inclined surface may have the same curvature as the outer surface of the semi-cylindrical cylinder, or may have the same curvature as the outer surface of the semi-elliptic cylinder (ax2 + by2 + c = 0, a, b are nonzero real numbers).

Furthermore, as shown in (d), the reflective module according to the present invention may be implemented in a columnar shape, that is, a trapezoidal cross section.

In addition, it is possible to implement the trace of the inclined surface with an unspecified curve as in (e).

In sum, the reflective module according to the present invention includes all the structures having an inclined surface capable of implementing a constant inclination on a surface corresponding to the light exit surface (that is, the angle at which the inclined surface of the exiting light and the reflection module meets is not perpendicular to each other. The slope of the structure). The illustrated one is illustrated in one three-dimensional shape, but this is only one embodiment, in the structure of (a) ~ (e) is cut in the vertical direction structure having one inclined plane, each module disposed two or more Combinations of different shapes each will be included in the gist of the present invention.

5, 6A, and 6B illustrate the results of simulating the presence or absence of luminance change according to the shape and height of the reflection module after the arrangement of the LED light source on the printed circuit board having the reflection module according to the present invention.

As shown in FIG. 5, a plurality of LED light sources 130 are disposed on the printed circuit board 110. Considering a cross-sectional conceptual view of one region X of the center, the LED light direction X1, The reflection module 200 corresponding to X2) may be arranged as a cross-sectional view at the bottom.

In particular, in this case, the cross-sectional shape of the reflective module 200 is formed by inserting and arranging a triangular structure (a) and a trapezoidal structure (b), and FIG. 6A illustrates a change in luminance when the reflective module is not arranged. Shown in

As shown in Figure 6a, the cross-sectional shape of the reflection module is divided into 0.6t, 1.2t according to the height of the triangle, trapezoidal to compare the case of no reflection module (height 0t).

In the absence of a reflection module (height 0t), the average value (lux) is 4189, and when the cross-section of the reflection module is triangular, the luminance is greatly improved to 5797 at height 0.6t and 8602 at height 1.2t, and the cross section of the reflection module is trapezoidal. In the case of, the luminance is significantly improved to 6359 at height 0.6t and 8856 at height 1.2t.

That is, compared to the case without the reflection module, it can be seen that the brightness is sharply improved (105% compared with the existing), and in the same shape it can be seen that the brightness is also increased as the height of the reflection module of the present invention increases. . Further, the uniformity of the luminance can be controlled by only the inclination of the structure.

Therefore, in the lighting apparatus according to the present invention, the presence of the reflection module removes the light guide plate and forms a structure for guiding the light source using a film type resin layer, thereby reducing the number of light sources and reducing the overall thickness of the lighting apparatus. At the same time, the advantages of thinning and maximizing luminance are realized.

2. Second Embodiment

Referring to FIG. 7, in addition to the structure of the first embodiment described with reference to FIG. 3, in the present invention, as the second embodiment, the optical pattern layer 150 may be further provided on the resin layer 140.

That is, as shown in FIG. 7, a plurality of LED light sources 130 formed on the printed circuit board 110, a resin layer 140 stacked in a structure covering the LED light source 130, and the The structure of the reflective module 200 having an inclined surface corresponding to the light emission direction may further include an optical pattern layer 150.

The resin layer 140 is stacked in a structure surrounding the LED light source 130 and performs a function of dispersing light of a light source emitted laterally, as described above, and the reflection module 200 Efficiently reflects the light emitted from the light source, thereby improving the brightness.

In addition, the optical pattern layer 150 in the second embodiment is a structure formed to prevent the concentration of light emitted from the LED light source 130, it may be implemented in the following structure.

The optical pattern layer 150 may include an adhesive pattern layer 153 forming a second air region 152 surrounding the periphery of the optical pattern. That is, the adhesive pattern layer 153 is formed by forming a space (second air region) having a predetermined shape in the optical pattern 151, and applying and bonding an adhesive material to the other portions.

That is, in the arrangement of the optical pattern layer 150 and the adhesive pattern layer 153 in the illustrated structure, the optical pattern layer 150 may include a first substrate 150A including the optical pattern therein and A second substrate 150B is provided, and the adhesive pattern layer 153 is applied to a portion other than the second air region 152 surrounding the periphery of the light shielding pattern, so that the first substrate 150A and the second substrate are provided. 150B will be bonded.

That is, the optical pattern 151 may be formed as a light shielding pattern formed to prevent concentration of light emitted from the LED light source 130, and for this purpose, between the optical pattern 151 and the position of the LED light source 130. Alignment is required, and after the alignment is performed using an adhesive member (adhensive) to secure the fixing force.

As the first substrate 150A and the second substrate 150B, a substrate made of a material having excellent light transmittance may be used. For example, PET may be used. In this case, the optical pattern 151 disposed between the first substrate 150A and the second substrate 150B basically serves to prevent the light emitted from the LED light source from being concentrated, and the first substrate ( 150A) or the second substrate 150B may be implemented through shading printing, and the two layers may be bonded to each other by an adhesive layer for applying an adhesive material in a structure surrounding the periphery of the shading pattern. . That is, the adhesive structure of the first substrate 150A and the second substrate 150B may be implemented together with the function of fixing the printed light shielding pattern 151. In addition, as the adhesive layer, a thermosetting PSA, a thermosetting adhesive, or a UV curing PSA type material may be used.

When the adhesive pattern layer 153 is formed to be bonded in a pattern structure that forms the second air region 152 when the adhesive pattern layer 153 is formed, a strong hot spot or a dark portion formed by the adhesive material overlapping the light shielding pattern is formed. It is possible to prevent the occurrence, and to increase the uniformity of light due to the presence of the air layer (air layer).

The lighting apparatus according to the present invention having the above-described structure, in addition to the above-described configuration, as shown in FIG. 8 of a third embodiment to be described later, a diffusion plate 170 may be provided on the resin layer 140, An air gap module 160 having a third air region 161 may be further provided between the diffusion plate 170 and the optical pattern layer 150. In addition, a prism sheet, a protective sheet, etc. may be additionally provided on the diffusion plate.

The optical pattern 151 may not be a function of completely blocking light, but may be implemented to control light blocking degree or diffusing degree of light with one optical pattern to perform a function of partially blocking and diffusing light. Furthermore, more preferably, the optical pattern according to the present invention may be implemented as a superimposed printed structure of a complex pattern. The superimposed printing structure refers to a structure that forms one pattern and prints another pattern shape on the upper portion thereof.

For example, in implementing the optical pattern 151, a light shielding ink including any one or more materials selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , and Silicon on the bottom surface of the polymer film in the light emitting direction It can be implemented as a superimposed printing structure of the light shielding pattern using a diffusion pattern formed by using a, and a light shielding ink containing Al or a mixture of Al and TiO ₂ . That is, after the diffusion pattern is formed on the surface of the polymer film by white printing, the light shielding pattern may be formed thereon, or in the reverse order, the double structure may be formed. Of course, it will be apparent that the patterned design of the pattern may be variously modified in consideration of light efficiency, intensity, and light blocking rate. Alternatively, it is also possible to form a light-shielding pattern, which is a metal pattern, in the middle layer in a sequential layer structure, and a triple-layer structure in which diffusion patterns are formed in the upper and lower portions, respectively. In such a triple structure, it is possible to select and implement the above-described materials. As a preferred example, one of the diffusion patterns is implemented using TiO ₂ having excellent refractive index, and CaCO ₃ having excellent light stability and color sense is used together with TiO _2. It is possible to realize different diffusion patterns, and to secure light efficiency and uniformity through the triple structure of the structure implementing the light shielding pattern using Al having excellent concealment. In particular, CaCO ₃ functions to subtract the exposure of yellow light to finally implement white light, thereby realizing more stable light. In addition to CaCO ₃ , particles such as BaSO ₄ , Al ₂ O ₃ , and silicon beads Larger, similarly structured inorganic materials may be used. In addition, it is preferable that the optical pattern is formed by adjusting the pattern density so that the pattern density becomes lower as the distance from the emitting direction of the LED light source decreases.

3. Third Embodiment

A third embodiment having a structure different from that of the first or second embodiment described above will be described with reference to FIG.

The third embodiment is characterized in that in the configuration of the first or second embodiment described above, the reflective unit 120 is formed in a structure in which an air region is implemented between the printed circuit board and the resin layer.

That is, as shown in FIG. 8, the reflective unit 120 is spaced apart from the first reflective film 121 and the first reflective film 121 in close contact with the surface of the printed circuit board 110. It may be configured to include a second reflective film 122 of the transparent material forming the region (A1). The first and second reflective films 121 and 122 are stacked on the printed circuit board, and the LED light source 130 protrudes to the outside through the holes formed on the reflective film.

The air region A1 may be formed by integrally compressing the first and second reflective films 121 and 122 without using an adhesive or the like. Likewise, the first and second reflective films 121 and 122 may be spaced apart from each other so as to realize an air region A1 in which air is accommodated through a spacer 123 such as a separate adhesive member.

In this case, the first reflecting film 121 may use a film formed with a reflective material reflecting light, such as Ag, and the like, and the second reflecting film 122 may include light emitted from the LED. It is more preferable to use a film of a transparent material so as to be transmitted to the surface of the first reflective film 122 and reflected again. Particularly, in addition to the light emitted from the light source 130 passing through the first reflective film to be re-reflected from the second reflective film, the reflective pattern 124 is formed on the surface of the second reflective film 122 by white printing. It is more preferable to further facilitate the dispersion of light to improve the brightness.

The reflection unit 120 in the third embodiment, along with the reflection module 200 according to the present invention implements the advantage of maximizing the brightness of the light.

*4. Fourth Embodiment

Referring to FIG. 9, the present invention may further include an air region disposed between the optical pattern layer 150 and the diffusion plate 170 in the above-described structure in the first to third embodiments. As an example, an air region (hereinafter referred to as a third air region ') disposed between the optical pattern layer 150 and the diffusion plate 170 described with reference to FIG. 8 will be described.

That is, a structure having an air layer (third air region) 160 may be added between the optical pattern layer 150 and the diffusion plate 170 in the structure of the illumination device according to the present invention, An effect of diffusing the light emitted from the light source due to the presence of the light source 161 and improving the uniformity of light can be realized. In addition, in order to minimize the deviation of the light transmitted through the resin layer 140 and the optical pattern layer 150, the thickness of the third air region 160 is preferably formed to be 0.01 ~ 2mm.

The third air region 160 may be formed by implementing a structure in which an air layer may be formed below the diffusion plate. The third air region includes a method of implementing an air region (air layer) by processing the diffusion plate itself, or a configuration of forming an air region by forming a separate structure under the diffusion plate.

The lighting apparatus according to the present invention described above can be applied to the LCD through the following configuration and operation. Referring to the structure of FIG. 9, the light is emitted from the side emitting type LED 130 in the lateral direction, and the emitted light is reflected and diffused from the resin layer 140 formed instead of the structure of the conventional light guide plate. The brightness of the light is further improved due to the light reflected back to the inclined surface of the reflective module 200 corresponding to the surface.

In addition, the emitted and reflected light proceeds in the direction of the diffusion plate. In this case, the light is prevented from being concentrated through the optical pattern layer 150, and the deviation of the light is minimized through the third air region formed under the diffusion plate. It becomes possible.

In particular, due to the presence of the reflection unit 120 according to the present invention disposed between the resin layer 140 and the printed circuit board 110 can further improve the reflectance, maximize the efficiency of light and improve the brightness Can be implemented. In particular, in the case of the reflective unit 120 according to the present invention, it is possible to implement the reflectance control by varying the design to implement the air region through the patterning of the adhesive material layer, and reflectance different according to the material, type of the patterned adhesive material It also has the effect of adjusting the color implementation. Furthermore, the reflectance may be adjusted according to the optical characteristics and the thickness of the second reflective film 122.

The resin layer used in the above-described first to fourth embodiments may use the following resin.

Of course, the resin layer according to the present invention can be used as long as it is a resin of a material capable of diffusing light. As an example, a resin containing a urethane acrylate oligomer as a main raw material may be used as the main material of the resin layer according to an embodiment of the present invention. For example, a mixture of the urethane acrylate oligomer which is a synthetic oligomer with the polymer type which is a polyacryl may be used. Of course, the low-boiling dilution-type reactive monomer IBOA (isobornyl acrylate), HPA (Hydroxylpropyl acrylate, 2-HEA (2-hydroxyethyl acrylate), etc. may further include a monomer, a photoinitiator (for example, 1 -hydroxycyclohexyl phenyl-ketone, etc.) or an antioxidant, etc. In addition, the resin layer may include beads to increase light diffusion and reflection. It is preferable to include 0.01 to 0.3% of the weight of the layer, that is, the light emitted laterally from the LED is diffused and reflected through the resin layer 140 and the beads to proceed upward. Innovatively reduce the thickness of the conventional light guide plate to realize the thinning of the entire product, as well as the flexible material that can be applied to the flexible display bar The castle can be provided.

In sum, the existence of the reflection module 200 having the inclined surface on the surface corresponding to the light output direction of the light source according to the present invention maximizes the brightness of the light as a whole. Furthermore, by the reflection unit 120 and the reflection pattern 124, the light can be further increased the reflection efficiency, it is possible to guide the light forward.

The light passing through the resin layer 140 is subjected to a process of being diffused or shielded through the optical pattern 151 formed on the optical pattern layer 150, and the purified light is formed on the lower portion of the diffuser plate. The optical properties are once again refined through the area to increase the uniformity, and then enter the LCD panel as white light through optical sheets such as the prism sheet 180 and the DBEF 190 which are added later.

As such, the lighting device according to the present invention maximizes the reflection efficiency through the structure having the air region of the reflecting unit, and when implemented as the lighting device, removes the structure of the light guide plate and provides the light source as a side emitting type LED. By applying and diffusing light through the resin layer and inducing light through reflection, the thickness and the number of light sources can be reduced. On the other hand, it is possible to improve the optical characteristics by controlling the problem of the luminance decrease and uniformity due to the reduction of the light source with the air pattern of the reflective pattern, the light shielding pattern and the air gap module.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

110: printed circuit board
120: reflection unit
121, 122: first reflective film, second reflective film
123: spacer
124: reflection pattern
130: light source
140: Resin layer
150: optical pattern layer
151: optical pattern
152: first air area
153: adhesive layer
160: second air area
170: diffuser plate
180: prism sheet
190: DBEF
200: reflection module
210: slope
220: reflective film
230: base surface

Claims (17)

A plurality of LED light sources formed on the printed circuit board;
A resin layer laminated in a structure covering the LED light source; And
And a reflection module formed on the printed circuit board and having an inclined surface corresponding to the light output direction of the light source.
The method according to claim 1,
The reflection module,
And a horizontal incident path of the light emitted from the light source and an angle formed by the inclined surface form an acute angle or an obtuse angle.
The method according to claim 1,
The reflection module,
Base surface; and
Lighting device having a three-dimensional shape having the inclined surface formed on one side or both sides of the base surface having an inclined angle.
The method according to claim 3,
Lighting device of the three-dimensional vertical section is a triangle, trapezoid, semicircle, semi-ellipse, slope.
The method according to claim 2,
The reflection module,
Illumination device that the reflective layer is coated on the inclined surface.
The method according to claim 5,
The reflection module,
Lighting device further comprises a plurality of reflective patterns formed in the reflective layer.
The method of claim 6,
The reflection pattern is,
Patterned illuminator printed with reflective ink comprising any one of TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, PS.
The method according to claim 1,
The height of the reflection module is an illumination device formed below the height of the resin layer.
The method according to claim 8,
And a reflective unit stacked between the resin layer and the printed circuit board to penetrate the LED light source and having an air region formed therein.
The method according to claim 9,
The reflection unit,
A first reflective film in close contact with the surface of the printed circuit board; and
And a second reflective film of transparent material spaced apart from the first reflective film by an adhesive pattern material to form the air region.
The method of claim 10,
The second reflective film,
Illumination apparatus further comprises a reflective pattern on the surface of the second reflective film.
The method according to claim 8,
And an optical pattern layer disposed on the resin layer to implement an optical pattern for diffusing light.
The method of claim 12,
The optical pattern layer,
A first substrate and a second substrate including the optical pattern therein,
And an adhesive material is applied to a portion other than the second air region surrounding the periphery of the optical pattern.
The method according to claim 13,
The optical pattern is an illumination device formed of a material containing any one or more materials selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, PS.
The method of claim 12,
Lighting device further comprises a diffusion plate disposed on the optical pattern layer.
The method according to claim 14,
And a third air region disposed between the optical pattern layer and the diffusion plate.
A light emitting diode (LED) formed on the printed circuit board;
Claim 1 to 16, including a resin layer stacked in a structure covering the light emitting diode (LED) comprising a lighting device according to any one of claims 1 to 16.

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