KR102177715B1 - Lighting Device - Google Patents

Abstract

The present invention relates to a lighting device that displays a linear light having a three-dimensional effect using incident light having directionality and outputs planar light around the linear light, wherein the lighting device includes a first surface and a first surface opposite to the first surface. A light guide unit having two sides and guiding incident light, a three-dimensional effect forming unit having a pattern inside or on the surface of the light guide unit, a light source unit supplying incident light to the inside of the light guide unit, and outgoing light from the light source unit to the second surface And a diffusion inducing unit for generating a plane light covering the light source on a second region of the second surface, wherein the patterns are sequentially arranged and a plurality of inclined surfaces each having an inclination angle with respect to the first surface or the second surface. Of the pattern units, and the plurality of pattern units guide the incident light in the direction of the first surface facing the first surface or the direction of the second surface facing the second surface by refraction and reflection on the inclined surface. It is converted into linear light of the first path extending in a direction orthogonal to the pattern extension direction, and is generated on the first area of the second surface.

Description

Lighting Device}

The present invention relates to a lighting device that displays linear light having a three-dimensional effect using incident light having directionality and outputs planar light around the linear light.

LED (Light Emitting Diode) is a kind of compound semiconductor device that emits light by converting the current when applied to the current. A light source using an LED element has advantages such as low power, high color temperature, and long life compared to a conventional light source such as a fluorescent lamp.

Most backlight devices equipped with an LED light source have a side-illuminated structure in which a plurality of LED light sources are arranged on at least one side of the light guide plate, and the luminance in the dimming plane by diffusing upwardly leaking light placed between the reflective film and the light guide plate in the left and right directions. It is configured to minimize deviation.

However, since the conventional backlight device uses a light guide plate, the light efficiency of the lighting device decreases due to the thickness of the light guide plate itself, there is a limit to thinning the thickness of the device, and it is difficult to apply to a flexible lighting device or display device because the light guide plate itself is not flexible. There is a disadvantage in that product design and design transformation are not easy.

In addition, most lighting devices using conventional LED light sources are devices that provide flat lighting in a simple form, and in order to realize lighting with a three-dimensional effect, a plurality of light sources must be arranged three-dimensionally, so the installation space of the device must be large and manufactured. There is a disadvantage that the cost increases and installation and maintenance are difficult.

In one embodiment of the present invention, it is intended to provide a lighting device capable of increasing the diversity of optical images and increasing light efficiency by converting incident light into linear light having a three-dimensional effect through pattern design and displaying it, and adding flat light around the linear light. do.

Another embodiment of the present invention is to provide a lighting device that can be easily applied to flexible or curved applications while outputting a combination of linear light having a three-dimensional effect of a geometric shape and a planar light.

In order to solve the above-described problem, a lighting device according to an aspect of the present invention includes a first surface and a second surface opposite to the first surface, and a light guide unit for inducing incident light, inside or on the surface of the light guide unit. A three-dimensional effect forming unit having a pattern, a light source unit that supplies incident light into the light guide unit, and a plane light that covers the light source on the second area of the second surface by diffusing the emitted light from the light source unit to the second surface. It includes a diffusion induction part. Here, the pattern includes a plurality of pattern units that are sequentially arranged and each having an inclined surface having an inclination angle with respect to the first surface or the second surface, and the plurality of pattern units transmit incident light to the first surface by refraction and reflection on the inclined surface. It is converted into a linear light of a first path extending in a direction orthogonal to each pattern extension direction of a plurality of pattern units by guiding in the direction of the first surface facing this direction or the direction of the second surface facing the second surface. Create on the area.

In one embodiment, the second region surrounds at least a portion of the first region, and at least a portion of the second region is positioned above the light source of the light source unit.

In one embodiment, the diffusion induction unit includes a first reflector and a second reflector facing each other and disposed with a spaced area therebetween.

In one embodiment, the first reflector and the second reflector have one end disposed on the second surface and the other end extending inclined outwardly on the second surface.

In one embodiment, the first reflector and the second reflector have a hollow shape in which both edges facing each other are connected to each other, and the other end of the plurality of diffusion inducing portions each having a hollow shape is on the second area of the second surface. Distributed. A diffusion member may be further provided between the first reflector and the second reflector.

In one embodiment, the lighting device may further include a diffusion member disposed on the other end of the first reflector and the second reflector. The diffusion member may be disposed at one end to diffuse light emitted through between the first and second reflectors on a plane having a predetermined width parallel to the second surface.

In an embodiment, the diffusion inducing unit may include a plurality of pairs of first and second reflectors surrounding the edge of the second surface of the optical guide unit. In a plurality of pairs, one end of the first and second reflectors of the first pair, and one end of the first and second reflectors of the second pair may be integrally disposed above the light source of the light source unit.

According to the present invention, by converting incident light into linear light having a three-dimensional effect through pattern design and displaying it, and adding planar light around the linear light using an unintended light source or hot spot light source when forming the linear light, the diversity of optical images and A lighting device with improved light efficiency can be provided.

In addition, according to the present invention, it is possible to implement a lighting device that outputs flat light combined with linear light without using a diffuser plate, a diffusion sheet, or a diffuser using a pattern in a lighting device using a three-dimensional effect linear light.

In addition, according to the present invention, not only can the front luminous intensity be improved by combining the three-dimensional effect linear light and the plane light around the linear light, but also the light distribution can be adjusted, it is easily applicable to flexible or curved applications, and the structure is simple. Thus, it is possible to provide a lighting device having excellent durability and low manufacturing cost.

In addition, according to the present invention, it is possible to provide a lighting device that expresses a light image of various colors in which a three-dimensional light and a plane light are combined using a light emitting diode (LED) light source. The above-described lighting device is useful for indoor and outdoor lighting devices or vehicle lamps.

1 is a perspective view of a lighting device according to an embodiment of the present invention
2A is a plan view of the lighting device of FIG. 1
2B is a plan view of a modified example of the lighting device of FIG. 2A
3 is an operating state diagram of the lighting device of FIG. 2A
4 is an exemplary view of an operating state of a lighting device according to a comparative example
5 is a partial plan view of the lighting device of FIG. 2A
6 is a partially enlarged cross-sectional view for explaining the principle of generating a three-dimensional effect linear light of the lighting device of FIG. 2A
7 is a schematic cross-sectional view of a lighting device according to another embodiment of the present invention
8 is an exemplary view of a modified example of a diffusion inducing unit of the lighting device of FIG. 7
9 is a cross-sectional view of a lighting device according to another embodiment of the present invention
10 is a partially enlarged cross-sectional view of the lighting device of FIG. 9
11 is a partial cross-sectional view of a lighting device according to another embodiment of the present invention
12 is a partial cross-sectional view of a light guide part of a lighting device according to another embodiment of the present invention
13 to 15 are exemplary views of a pattern of a three-dimensional effect forming unit that can be employed in the lighting device of this embodiment.
16 is a schematic plan view for explaining a lighting device according to another embodiment of the present invention
17 is an exemplary view of an operating state of a comparative example for explaining the operating principle of the lighting device of FIG. 16
18 is an exemplary view of a lighting device according to another embodiment of 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 in which one of ordinary skill in the art can easily implement the present invention. However, it should be understood that the embodiments described in the present specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and there may be various equivalents and modified examples that can replace them at the time of application. In addition, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention in describing the operation principle of the preferred embodiment of the present invention in detail, the detailed description thereof will be omitted. The terms described below are terms defined in consideration of functions in the present invention, and the meaning of each term should be interpreted based on the contents throughout the present specification. The same reference numerals are used for parts having similar functions and functions throughout the drawings.

1 is a perspective view of a lighting device according to an embodiment of the present invention. 2A is a plan view of the lighting device of FIG. 1.

1 and 2A, the lighting device 100 according to the present embodiment includes a light guide unit 10, a pattern layer 20a, and a diffusion guide unit 50. The lighting device 100 may further include a light source unit 30, a printed circuit board 31, and a reflective layer 40.

The optical guide unit 10 guides incident light from one side to the other by internal reflection. A plate or film having a first surface (or upper surface) and a second surface (or lower surface) opposite to the first surface, and having a predetermined thickness between the first surface and the second surface. When provided with a shape, the light guide portion 10 becomes a medium defined by a first surface and a second surface and side surfaces extending between the edges thereof. In this case, incident light that is incident into the light guide unit 10 or irradiated from the light guide unit 10 is totally reflected inside the medium and moves from one side (or first side) to the other side (or second side).

The optical guide unit 10 is made of a material such as glass or resin. When the optical guide portion 10 is formed of resin, the material of the optical guide portion 10 may include a silicon-based resin. For example, the material of the optical guide unit 10 made of a silicone resin is vinylated organopolysiloxanes, hydrogen organopolysiloxanes, vinylated silicates, and platinum curing. It may be a catalyst (Platinum curing catalyst) and additives. Additives include photoinitiators and antioxidants.

In addition, when the optical guide portion 10 is formed of a resin layer, the material composition of the optical guide portion 10 is 20-40% by weight of organopolysiloxane having a vinyl group, 20-40% of organopolysiloxane containing hydrogen, It may have 10 to 20% by weight of a silicate having a vinyl group, 1 to 3% by weight of a platinum curing catalyst, and 1 to 3% by weight of an additive. When the light guide unit 10 is implemented with a silicon-based resin layer, the heat resistance of the lighting device 100 may be increased to 125° C. or higher, thereby satisfying the heat resistance condition required for a vehicle headlight.

In addition, when the light guide unit 10 is formed of a resin layer, the lighting device 100 may have a predetermined flexibility according to the thickness of the resin layer. For example, the optical guide unit 10 may have a degree of flexibility that can be wound on a roll, and in that case, the thickness of the resin layer is about 250 μm or less. Using this flexibility, the optical guide unit 10 may have various shapes according to the structure or shape of the application. For example, when the lighting device 100 is used as a vehicle lamp, particularly a rear combination lamp or a headlamp, the light guide unit 10 may have a shape similar to the outer lens of the vehicle lamp (a shape on a plane). The outer lens may have a human eye shape or an approximately parallelogram shape (see FIGS. 16 and 17), but is not limited thereto.

The pattern layer 20a is disposed on the first surface of the light guide part 10. The pattern layer 20a may be bonded by an adhesive layer or directly bonded to the first surface of the optical guide unit 10 by stress of a material. The pattern layer 20a includes a second surface bonded to the first surface of the optical guide unit 10 and a first surface opposite to the second surface. In addition, the pattern layer 20a includes a pattern (refer to reference numeral 22 in FIG. 5) arranged on the first surface.

The pattern constitutes a three-dimensional effect forming unit (see reference numeral 20 in FIG. 5), and converts incident light to generate linear light having a three-dimensional effect. The pattern will be described in detail below.

The pattern layer 20a is made of a material capable of ensuring the ease of processing and durability of the pattern. As a material for the pattern layer 20a, a thermoplastic polymer or a photocurable polymer may be used.

The diffusion induction part 50 is arranged on the second surface of the light guide part 10. The diffusion induction part 50 diffuses and induces the light emitted from the second surface. When the diffusion induction part 50 has a predetermined light transmittance, the diffusion induction part 50 implements planar light in the direction of the second surface to which the second surface faces through the diffusion-induced emission light. In this embodiment, the diffusion induction part 50 is a hexahedral shape having a hollow part 52, and one end of the diffusion induction part 50 to which one end of the hollow part 52 is exposed is inclined slot shape in contact with the second surface However, it is not limited thereto.

The outgoing light entering one end of the expansion induction part 50 is the light that is emitted directly above the LED device by reflecting the incident light of the LED device used as a light source directly or by a reflective layer, and is an unwanted outgoing light when implementing a three-dimensional effect linear light. I can.

According to the above-described diffusion induction unit 50, while implementing a three-dimensional effect linear light by a pattern of the pattern layer 20a in the direction of the second surface of the light guide unit 10, it is located on one side of the three-dimensional effect linear light, and some light sources are provided. By generating a shielding plane light, a combination of linear light and plane light can be expressed.

The light source unit 30 supplies incident light into the light guide unit 10. It may be arranged to supply incident light from the outside of the light guide unit 10 to the inside of the light guide unit 10, but in this embodiment, the light guide unit 10 is embedded in the light guide unit 10 for convenience of illustration and description. It will be described as irradiating light to and supplying incident light.

The light source unit 30 may be an LED package including at least one LED (Light Emitting Diode) device. In this embodiment, the light source unit 30 is 12 LED packages arranged in a zigzag shape when viewed from the first or second side of the first side and the second side facing each other of the rectangular parallelepiped light guide unit 10 It may include.

The LED device may be of a top view type or a side view type. When installing the side-type LED device, the LED device may be mounted at a predetermined angle to adjust the incident angle of the incident light on the first or second surface of the light guide unit 10. In the case of using the top type, the light source unit 30 may be mounted on the printed circuit board 31 by a soldering process while lying on the side.

The printed circuit board 31 is disposed on the first surface of the optical guide unit 10. The light source unit 30 may be embedded on the printed circuit board 31 by the light guide unit 10. The printed circuit board 31 includes a pad portion on which the light source unit 30 is mounted, and a wiring for transmitting power or a signal to the light source unit 30.

In this embodiment, the printed circuit board 31 may be a rigid or flexible type. In the case of a rigid printed circuit board, the material of the printed circuit board 20 may be FR4 (Flame Retardant Composition 4). When using a rigid printed circuit board, cost can be reduced compared to using a flexible printed circuit board.

The reflective layer 40 is disposed between the printed circuit board 31 and the optical guide unit 10. The reflective layer 40 is made of a material with high reflection efficiency, and the light from the light source unit 30 is emitted in the direction of the first surface facing the first surface of the light guide unit 10 by reflection and refraction in the pattern of the pattern layer 20a. Is reflected toward the pattern layer 20a and the light guide portion 10.

As a material of the reflective layer 40, a synthetic resin containing dispersed white pigment having excellent light reflective properties may be used. As a white pigment, titanium oxide (TiO ₂ ), aluminum oxide (Al ₂ O ₃ ), zinc oxide (ZnO), barium sulfate (BaSO ₄ ), calcium carbonate (CaCO ₃ ), carbonates, etc. can be used, and synthetic resin raw materials As the furnace, polyethylene terephthalate, polyethylene naphthalate, acrylic, polycarbonate, polystyrene, polyolefin, cellulose acetate, weather-resistant vinyl chloride, and the like may be used, but are not limited thereto. In addition, depending on the implementation, the reflective layer 40 may be formed of silver (Ag), aluminum (Al), stainless steel, or the like. When the reflective layer 40 is used, light loss of the lighting device 100 can be reduced and linear light having a three-dimensional effect can be more clearly expressed.

In the above-described configuration, the side-type or top-type LED elements are mounted inclined or not inclined on the printed circuit board 31, and then the reflective layer 40 and the light guide portion 10 are sequentially formed, and the LED element ( When power is supplied to the light source unit), some incident light of the LED element supplied into the light guide unit 10 passes directly through the second surface of the light guide unit 10 according to the light exit angle of the LED element. It is converted to emission light traveling in the direction of two sides, or is converted to the output light traveling in the direction of the second side after passing through the second side by reflecting from the pattern immediately in front of the emission side of the LED element or the reflective layer 40 under the pattern. . The outgoing light is diffused and guided by the diffusion inducing part 50 to be implemented as planar light covering a part of the second surface in the direction of the second surface.

2B is a plan view of a modified example of the lighting device of FIG. 2A.

Referring to FIG. 2B, the lighting device according to the present embodiment includes a light guide unit 10, a three-dimensional effect forming unit, a light source unit 30, and a diffusion induction unit 50.

The diffusion induction part 50 includes a first reflector (refer to 51a in FIG. 8) and a second reflector (refer to 51b in FIG. 8). The first reflector and the second reflector have one end disposed on the second surface of the light guide unit 10 and the other end extending inclined to the outside on the second surface.

For example, in more detail, the first reflector and the second reflector may have a hollow shape in which both edges facing each other are connected to each other. The other ends 52a to 52f of the plurality of diffusion inducing portions 50 each having a hollow shape are distributedly disposed on the second area of the second surface of the optical guide portion 10. A diffusion member may be filled in a spaced area that is a hollow portion between the first and second reflectors.

According to the present embodiment, it is possible to provide a lighting device to which plane light of various optical images is added by adjusting the area or density of the other end of the diffusion induction unit 50 in the form of a plurality of point light sources.

3 is an operating state diagram of the lighting device of FIG. 2A.

Referring to FIG. 3, in the lighting device 100 of the present embodiment, when power is supplied to the light source unit 30 including 12 LED packages, the first light guide unit 10 is disposed near the first side. The sixth LED packages irradiate incident light from the first side to the second side, and the seventh to 12th LED packages disposed near the second side of the light guide unit 10 are from the second side to the first side. The incident light is irradiated toward it.

At this time, the incident light is reflected from the pattern while being guided to a specific optical path (first path) according to the pattern design (pattern pitch, pattern arrangement direction, etc.) of the pattern layer 20a having a refractive index difference of 0.2 or less from the optical guide unit 10. And it is converted into a three-dimensional effect linear light BL1 showing a sense of depth in the thickness direction of the optical guide unit 10 by refraction.

In the present embodiment, the three-dimensional effect linear light BL1 is the same, different directions, or opposite directions according to different pattern arrangement directions of patterns located in different areas of the light guide unit 10 and positions of the LED packages. It is output as 12 three-dimensional effect linear lights extending to the furnace D1.

Each three-dimensional effect linear light has two linear lights because each LED package uses two LED elements, and when the LED package uses one LED element, each three-dimensional effect linear light has one line in the same pattern structure. It will display fluorescence.

In addition, in the lighting device 100 of the present embodiment, when power is supplied to the light source unit 30, the light emitted in the direction of the second surface above the LED package is diffused and guided by the diffusion induction unit 50 to be guided by the light guide unit ( A plane light BL2 is generated on the second surface of 10).

The planar light BL2 is either planar light implemented near the hollow part 52 of the diffusion induction part 50 or is implemented in the entire diffusion induction part 50 including the hollow part 52 according to the structure or transparency of the diffusion induction part 50 It may be a flat light.

On the other hand, in the lighting devices of FIGS. 1 to 3, for convenience of illustration, the outgoing light emitted to the top of the LED package in which the diffusion induction part 50 is not disposed, or a hot spot by such outgoing light (see the upper hot spot portion of the LED package in FIG. 4 ). ) Is omitted, but there is actually an outgoing light in front of the light source, a hot spot light, or an outgoing light hitting the opposite side after passing through the pattern, and a separate diffusion induction part is added to use the outgoing light or the light of the hot spot. Of course, it can be arranged as. The additionally disposed diffusion induction unit may be the same as the above-described diffusion induction unit 50 except that the diffusion induction unit 50 is disposed symmetrically.

In addition, although the lighting device of FIGS. 1 to 3 shows a lighting device including one diffusion induction part disposed at one edge of the second surface, the present invention is not limited to such a configuration, and the light guide part in the form of a rectangular parallelepiped It may be implemented as a lighting device that displays a plane light surrounding the edge of the second side in a rectangular frame shape and a linear light inside the plane light by installing diffusion induction units on all four sides of the two sides, respectively.

In addition, in the above-described embodiment, the diffusion induction unit 50 has been described mainly to induce diffusion of the emitted light through the hollow portion 52, but the present invention is not limited to such a configuration, and diffusion in the hollow portion 52 It may be implemented as a lighting device into which the member is inserted or filled. In this case, a more uniform plane light can be realized than before the use of the diffusion member.

4 is an exemplary diagram for an operating state of a lighting device according to a comparative example.

As shown in Fig. 4(a), when the diffusion induction unit (refer to reference numeral 50 of Figs. 1 to 3) of the present embodiment is omitted, the lighting device of the comparative example has a hot spot on the top of the light source unit (LED package). As a result, unpleasant glare may be provided by the user who uses the lighting device, and there may be disadvantages such as uneven lighting and lowering of luminance.

In addition, in the lighting device of the comparative example, if power is cut off to the light source, the light source may be exposed to the outside through the light guide, which may not be good in appearance.

Therefore, in this embodiment, by using the diffusion induction part on the upper part of the light guide part, the plane light is realized by using the unwanted light emitted from the lighting device or the light of the hot spot, and the performance and beauty are improved by preventing the light source part from being exposed to the outside. I can do it.

5 is a partial plan view of the lighting device of FIG. 2A. FIG. 5 corresponds to a plan view of the lighting device of FIG. 2A with the light guide unit 10 and the diffusion guide unit 50 removed.

Referring to FIG. 5, the lighting device 100 according to the present embodiment includes a light guide unit 10, a three-dimensional effect forming unit 20, and a light source unit 30. The three-dimensional effect forming part 20 is composed of a pattern 22 provided on the first surface of the pattern layer 20a.

The three-dimensional effect forming unit 20 is implemented as a pattern 22 disposed on one surface of the light guide unit 10 having a predetermined widthwise length W0 between the first side and the second side. The pattern 22 is designed according to the shape or shape of the three-dimensional effect linear light to be implemented. Pattern design refers to controlling or manufacturing the pitch or width of a pattern, or a pattern arrangement direction, a pattern extension structure (straight line, curved type, or a combination thereof) to a desired value or range.

In the present embodiment, the three-dimensional effect forming unit 20 includes a plurality of patterns disposed on different regions on one surface of the light guide unit 10. Two adjacent patterns may have different arrangement directions or different extension directions, and a pattern bent part 24 may be positioned at a boundary between two adjacent patterns.

According to the present embodiment, the lighting device 100 transmits incident light irradiated from each of the plurality of LED packages through a pattern 22 disposed on different areas of the light guide unit 10 to have different light paths ( D1, etc.) can be converted into a three-dimensional effect linear light (see Fig. 3).

6 is a partially enlarged cross-sectional view for explaining the principle of generating a three-dimensional effect linear light of the lighting device of FIG. 1. In FIG. 6, only a partial cross-sectional portion of the pattern layer 20a is enlarged.

Referring to FIG. 6, incident light BL0 supplied from a specific light source (LS) of the light source unit is the refractive index of the light guide unit (refer to reference numeral 10 in Fig. 1) and the pattern layer 20a and an external medium (atmosphere). It is reflected inside the stack of the light guide part and the pattern layer 20a below the critical angle determined by the refractive index of and moves from one side to the other.

When the incident light BL0 meets the inclined surface 221 of the pattern unit of the three-dimensional effect forming unit 20, the incident light BL0 is refracted or reflected from the inclined surface 221, thereby having an internal incident angle greater than the critical angle and It is emitted to the outside of the stack in the two-sided direction (z direction) or the first sided direction (-z direction).

In the above-described case, the pattern units of the three-dimensional effect forming unit 20 function as indirect light sources that refract or reflect the incident light BL0 on the inclined surface 221 to emit incident light in the direction of the first or second surface. Here, the indirect light sources formed by the respective pattern units appear to be gradually located further away from the reference point along the first path on the pattern when viewed from a predetermined reference point outside the lighting device. The reference point may be a point where a user, a camera, and the like are located at a predetermined distance from the lighting device in the direction of the second surface.

In other words, the pattern units are sequentially arranged in the pattern arrangement direction (x direction) based on the light source LS, and the first pattern units in the first region a1 ( P11), when the second pattern unit P12 in the second area a2 and the third pattern unit P13 in the third area a3 are present, the light source LS to the second pattern unit P12 The second optical path of the incident light is longer than the first optical path from the light source LS to the first pattern unit P11 and smaller than the third optical path from the light source LS to the third pattern unit P13.

That is, the second distance L2 from the second indirect light source LS2 to the second pattern unit P12 formed by reflection and refraction of the second pattern unit P12 is It is longer than the first distance L1 from the first indirect light source LS1 to the first pattern unit P11 formed by reflection and refraction, and is formed by reflection and refraction of the third pattern unit P13. It is shorter than the third distance L3 from the indirect light source LS3 to the third pattern unit P13.

It is a sense of depth in which the linear light enters inward from the second surface in the thickness direction of the light guide part by indirect light sources located progressively further away from the reference point along the first path on the pattern when viewed from a reference point outside the lighting device. ).

In other words, when viewed from the side in the direction of the second surface, the three-dimensional effect forming unit 20 is limited to a specific width in the first path predetermined by the pattern design, and the induced linear light is transmitted to the second surface of the optical guide unit or the pattern arrangement surface. An optical image having a sense of depth gradually entering the light guide unit from the opposite surface can be realized. Such an optical image may have a form in which luminance gradually decreases while following the first path.

As described above, the plurality of pattern units of the three-dimensional effect forming unit 20 are sequentially arranged along the first path of the linear light when viewed from a predetermined external reference point, and are formed into indirect light sources gradually located further away from the reference point. Each acts, and thereby the three-dimensional effect forming unit 20 implements a linear light having a three-dimensional effect, that is, a linear light having a three-dimensional effect on the first path.

Meanwhile, in the above-described first to third pattern units P11, P12, and P13, the second pattern unit P12 is the first pattern unit P11 in the pattern layer 20a when viewed from the light source LS side. ), or a pattern unit positioned between the first pattern unit P11 and a predetermined number of other pattern units. Similarly, the third pattern unit P13 is a pattern unit located immediately after the second pattern unit P12 when viewed from the light source LS side, or a predetermined number of other pattern units from the second pattern unit P12. It may be a pattern unit positioned between them.

7 is a schematic cross-sectional view of a lighting device according to another embodiment of the present invention.

Referring to FIG. 7, the lighting device 200 according to the present embodiment includes a light guide unit 10, a pattern layer 20a forming a three-dimensional effect forming unit by a pattern, a light source unit 30, a reflective layer 40, and It includes a diffusion induction unit 50. In addition, the lighting device 200 may include a reflective pattern 120, an adhesive pattern 130, and a spaced region 140 between the pattern layer 20a and the reflective layer 40. In addition, the lighting device 200 is the light source unit 30 through the printed circuit board 31 on which the light source unit 30 is mounted, a support unit 160 such as a frame supporting the printed circuit board 31 and the printed circuit board 31. ) May include a power supply unit 180 for supplying power.

In this embodiment, the light guide unit 10, the pattern layer 20a, the light source unit 30, and the reflective layer 40 are substantially the same as the corresponding components of the lighting device described above with reference to FIGS. 1 to 6.

The diffusion induction part 50 includes an inclined hollow portion 52 provided in the base material and a light diffusion layer 51 on an inner wall of the hollow portion 52. The base material is arranged on the second surface of the light guide unit 10 and is made of a transparent material such as glass or resin.

The hollow portion 52 is disposed to guide the outgoing light or hot spot light from the light source unit 30 directly above the light source unit 30 embedded in the light guide unit 10. One end of the hollow part 52 is aligned on the light source part 30. The inner wall penetrating the base material and connecting one end and the other end of the hollow portion 52 may extend straight on a straight line inclined from the second surface of the optical guide unit 10 to the outside of the second surface.

The light diffusion layer 51 is arranged on the inner surface of the hollow portion 52. The light diffusion layer 51 may be provided by coating or coating a light diffusion material on the hollow portion 52. The light diffusion layer 51 is at least one selected from silicon (sillicon), silica, glass bubble, PMMA, urethane, Zn, Zr, Al ₂ O ₃ , and acrylic. It may be implemented such that the material is dispersedly disposed inside or on the surface of the base material. When the light diffusion layer 51 includes a bead-shaped light diffusion material, the particle diameter of the bead may range from about 1 μm to about 20 μm, but is not limited thereto.

In this embodiment, the pattern layer 20a is disposed so that the pattern of the three-dimensional effect forming portion faces the reflective layer 40. This arrangement prevents the pattern covered by the resin layer from losing its inherent function (reflection and refraction function) when forming the optical guide part 10 by coating the resin on the pattern layer 20a. do. That is, the pattern (refer to reference numerals P11, P12, and P13 in FIG. 6) should act to guide the incident light to the outside of the lighting device by refracting and reflecting the incident light from the inclined surface, and is a resin layer having a refractive index similar to that of the pattern layer 20a When the pattern is covered, the inclined surface of the pattern substantially disappears, and the pattern cannot perform its function. However, in this embodiment, the above-described problem is prevented by disposing the pattern layer 20a so that the pattern does not face the light guide unit 10 but faces the reflective layer 40.

The reflective pattern 120 is provided on the reflective layer 40. The reflective pattern 120 is arranged between the reflective layer 40 and the pattern layer 20a. The reflective pattern 120 may be prepared by printing an ink material including the same material as the reflective layer 40 on the reflective layer 40. When the reflective pattern 120 is used, the reflective efficiency and reflective area of the reflective layer 40 can be controlled.

When the pattern layer 20a and the reflective layer 40 are stacked and disposed, the adhesive pattern 130 may be used. In that case, the adhesive pattern 130 may have a predetermined pattern (such as a honeycomb shape) and may be used to limit the reflectivity or reflective area of the reflective layer 40. The adhesive pattern 130 may be integrally implemented by the reflective pattern 120 containing an adhesive material according to implementation.

In addition, in the lighting device 200 of this embodiment, when the pattern layer 20a and the reflective layer 40 are stacked and disposed, the pattern layer 20a is formed by the pattern of the pattern layer 20a or the adhesive pattern 130 therebetween. ) And the reflective layer 40 may further include a spacing region 140 formed between. The separation area 140 may be provided as an air layer or a vacuum layer, and when the separation area 140 is used, it is possible to express a different shape of an optical image by inducing a microscopic scattering of the three-dimensional effect linear light itself or surrounding light. have.

Meanwhile, in the lighting device 200 of the present embodiment, the light source unit 30 mounted on the printed circuit board 31 is inside the light guide unit 10 through the opening of the reflective layer 40 and the opening of the pattern layer 20a. It can be arranged to extend to.

The support unit 160 may be provided to support the light guide unit 10 and the reflective layer 40 as well as the printed circuit board 31 on which the light source unit 30 is mounted. The support 160 may be prepared of a metallic material such as stainless steel.

The power supply unit 180 is connected to the light source unit 30 to supply power to the light source unit 30. The power supply unit 180 may include a commercial power source connected through wiring and a connector, but may be provided as a vehicle battery depending on implementation. When provided with a vehicle battery, the light source unit 30 may be connected to the vehicle battery and driven by power from the vehicle battery.

According to this embodiment, it is possible to provide a lighting device having flexibility, high heat resistance, excellent adhesion, high efficiency, and high reliability. In addition, when implementing a three-dimensional effect linear light by pattern design, it is possible to provide a lighting device that can change an optical image by using the reflective pattern 80, the adhesive pattern 130, or the spaced area 140. The device can be effectively applied to various applications such as vehicle dashboards.

In addition, the diffusion induction part 50 may include a hollow portion 52 penetrating the transparent base material and a light diffusion layer 51 arranged on an inner wall of the hollow portion 52 according to implementation. In that case, the hollow portion 52 may have a curved shape rather than a straight inner wall. The light diffusion layer 51 may be a reflector arranged on the inner wall of the hollow portion 52, but is not limited thereto.

In addition, when one end of the hollow portion 52 is aligned on the light source on the second surface of the optical guide portion, the second cross-sectional area of the second opening of the other end opposite to the one end of the hollow portion 52 is the first opening of one end. It may be larger than the first cross-sectional area of. Here, the above-described second opening may have a second cross-sectional area corresponding to a region in which planar light is to be formed. In addition, the first surface of the diffusion induction part 50 at one end of the hollow part 52 is a surface in contact with or adjacent to the second surface of the optical guide part, and the second surface of the diffusion induction part 50 is a first surface. As a surface opposite to the surface, it may be a surface located relatively far from the second surface of the light guide part.

According to the present embodiment, the outgoing light or hot spot light flowing into one end of the hollow portion 52 located on the first surface of the diffusion induction portion 50 is diffused from the inside of the hollow portion 52, Plane light of a desired size or shape can be implemented at the end. In other words, when the light diffusion layer 51 is used, various surface light source images can be implemented using the shape, thickness, material, and color of the light diffusion layer 51. Particularly, when the base material of the diffusion induction part 50 has a slight light guide function, the outgoing light passes through the light diffusion layer 51 of the inner wall of the hollow part and is converted into planar light that is diffused and distributed to a predetermined part of the base material. Can be.

8 is an exemplary diagram for a modified example of a diffusion induction unit of the lighting device of FIG. 7.

Referring to FIG. 8, the lighting device according to the present embodiment includes a diffusion induction part 50 in which a first reflector 51a and a second reflector 51b surrounding the edge of the second surface of the light guide part are disposed in a plurality of pairs. Include.

The diffusion induction part 50 includes one end of the first pair of first and second reflectors 51a and 51b and one end of the second pair of first and second reflectors 51a and 51b in a plurality of pairs. It may be formed to be integrally disposed above the light source of the light source unit.

In more detail, the first pair of first reflectors 51a and second reflectors 51b have one end 51c and the other end 51d opposite to the one end 51c, and the second pair of When the first reflector 51a and the second reflector 51b have one end 51c and the other end 51e opposite to the one end 51c, one end and a second pair of the first pair of reflectors One end of the reflectors of the light source is integrally positioned above the light source. In addition, the other end of the first pair of reflectors and the other end of the second pair of reflectors represent a plurality of plane lights. In this case, the plurality of planar lights may be planar lights that surround linear lights of the first area of the light guide unit in the form of a double band in the second area of the light guide unit, as in the lighting device of FIG. 18.

9 is a cross-sectional view of a lighting device according to another embodiment of the present invention. FIG. 10 is a partially enlarged cross-sectional view of a portion A1 of the diffusion induction part of the lighting device of FIG. 9.

Referring to FIG. 9, the lighting device according to the present embodiment includes a light guide part 10, a pattern layer 20a, a light source part 30, a printed circuit board 31, a pattern layer 40, a diffusion induction part 50a, 50b), a reflective pattern 120, an adhesive pattern 130, and a spacing region 140.

The constituent means of the lighting apparatus according to the present embodiment are substantially the same as the corresponding constituent means of the lighting apparatus described above with reference to FIG. 7 except for the diffusion induction parts 50a and 50b.

The diffusion induction units 50a and 50b according to the present embodiment include a light induction unit 50a and a light diffusion unit 50b as shown in FIG. 10.

The light induction part 50a has a shape of a hollow pipe or a hollow plate. The light guide portion 50a may have a structure in which the first plate 51 and the second plate 53 are disposed to face each other with a hollow portion 52 therebetween. At least one surface of the first plate 51 and the second plate 53 may have a reflective surface corresponding to the first reflector and the second reflector, respectively.

The first surface of the light guiding portion 50a on which one end of the hollow portion 50 is located is arranged on the second surface of the light guide portion to cover the front of the light exit surface of the light source from the top of the light guide portion by a predetermined length.

The light diffusion part 50b is coupled to the second surface of the light induction part 50a. The other end of the hollow portion 52 is exposed on the second surface of the light guide portion 50a, and the other end of the hollow portion is covered by the light diffusion portion 50b. The light diffusing part 50b is a plate-like member, and may be disposed to be spaced apart from the second surface of the light guide part by a predetermined distance, and has a width or length corresponding to the width or length of the flat polarized light to be implemented.

The light diffusion unit 50b diffuses the light flowing into the light diffusion unit 50b through the light guide unit 50a to the entire interior of the light diffusion unit 50b. For this, the material of the light diffusion unit 50b can be glass or resin, and silicon (sillicon), silica (silica), glass bubble (glass bubble), PMMA, urethane (urethane), Zn, Zr, Al ₂ O ₃ And acrylic (acryl) can be implemented by distributing and distributing at least one material selected from the inside or the surface of the base material (glass, resin, etc.). When the light diffusion part 50b includes a bead-type light diffusion material, the particle diameter of the bead may range from about 1 μm to about 20 μm.

11 is a partial cross-sectional view of a lighting device according to another exemplary embodiment of the present invention.

Referring to FIG. 11, the lighting device according to the present embodiment includes a light guide unit 10, a pattern layer 20a, a reflective layer 40, and a separation layer 80.

The lighting device according to the present embodiment may be substantially the same as any one of the lighting devices described above with reference to FIGS. 1 to 10 except for the arrangement direction of the pattern layer 20a and the separation layer 80. I can. That is, the arrangement structure of the pattern layer 20a and the separation layer 80 described in this embodiment may be applied to any of the above-described embodiments.

The pattern layer 20a is filled with a resin layer in which the pattern 22 of the three-dimensional effect forming portion 20 forms the light guide portion 10. In this case, if the difference in refractive index between the pattern layer 20a and the resin layer is small, the reflective and refractive functions of the pattern 22 may be substantially lost. In order to prevent this, in this embodiment, a separation layer 80 is disposed between the pattern 22 of the pattern layer 20a and the light guide part 10.

In other words, if the difference between the refractive index of the optical guide unit 10 and the refractive index of the pattern layer 20a is 0.2 or less, the inclined surface of the pattern 22 positioned therebetween does not properly refraction and reflect the incident light. In such a case, it is difficult to implement the three-dimensional effect linear light because the incident light of the light source unit cannot be guided to the outside of the lighting device in the pattern 22 of the three-dimensional effect forming unit 20. Therefore, in the lighting device according to the present embodiment, the pattern 22 and the light guide part 10 are separated by a separation layer 80 to separate the light guide part 10 and the pattern 22 formed of a resin layer. It is made so that reflection and refraction of incident light on the inclined surface of (22) can be performed smoothly.

The separation layer 80 may be a metallic coating layer disposed therebetween to prevent a difference in refractive index between the light guide unit 10 and the pattern layer 20a from becoming less than a predetermined value.

According to the present embodiment, it is possible to fill the pattern 22 of the three-dimensional effect forming portion 20 with a resin layer or to be disposed inside the optical guide portion made of a resin layer. That is, the pattern layer 20a is formed as a first resin layer, and after the separation layer 80 is formed, the optical guide unit 10 is formed with the second resin layer to bury the pattern 22 inside the optical guide unit. It is possible to do.

12 is a partial cross-sectional view of a light guide part of a lighting device according to another embodiment of the present invention.

Referring to FIG. 12, in the lighting device according to the present embodiment, a stack of the light guide unit 10 and the pattern layer 20a in any one of the embodiments described above with reference to FIGS. 1 to 11 is a single structure. It includes an optical guide portion (10a) provided with.

A pattern 22 is integrally provided on the first surface of the light guide portion 10a. The pattern 22 implements the three-dimensional effect forming unit 20. The optical guide portion 10a may be provided in a manner of forming a pattern 22 by cutting a part of the first surface of the glass with a cutter.

According to the present embodiment, the number of parts can be reduced, thereby simplifying the lighting device and reducing costs.

13 to 15 are exemplary views of a pattern of a three-dimensional effect forming unit that can be employed in the lighting device of this embodiment.

Referring to FIG. 13, the pattern 22 of the three-dimensional effect forming unit 20 according to the present embodiment has a pattern structure of a prism or a triangular cross-sectional shape. When the pattern 22 has a prism shape, the inclined surface 221 of the pattern 22 has a predetermined inclination angle with respect to the pattern arrangement surface extending in the x direction. That is, the inclined surface 221 may be designed to be inclined by a predetermined inclination angle θ with respect to a direction (z direction) orthogonal to the first surface 12 of the pattern layer or the light guide part. With respect to the first surface 12, the pattern layer in the stack of the optical guide portion and the pattern layer is simply referred to as an optical guide portion.

The inclination angle θ of the inclined surface 221 may be about 5° or more and about 85° or less. The inclination angle θ may be limited in consideration of the refractive index of the optical guide unit, but basically has a range of about 5° to about 85° when considering the minimum and maximum angles at which reflection and refraction can be properly performed on the inclined surface 221. I can.

As an example, when the refractive index of the optical guide part is in the range of about 1.30 to about 1.80, the inclination angle of the inclined surface 221 has a range greater than about 33.7° and less than about 50.3° according to the reference direction (z direction or x direction), or It may have a range greater than about 49.7° and less than about 56.3°.

In addition, depending on the implementation, the optical guide unit may be provided using a high refractive index material. For example, in the case of manufacturing a high-intensity LED (Light Emitting Diode), when light of a specific incident angle passes through the die and passes through the capsule material, the die (n=2.50~3.50) and the general polymer capsule material (n=1.40~1.60) ), total internal reflection occurs due to the difference between the n-value (refractive index) and the light extraction efficiency of the device decreases, and a high refractive index polymer (n=1.80~2.50) is used to properly solve this. That is, in the case of providing an optical guide part using a high-refractive-index polymer used in manufacturing a high-intensity LED in this embodiment, the inclination angle of the inclined surface 221 of the pattern 22 is greater than about 23.6° and about 56.3 according to the refractive index of the optical guide part. It can have a range less than °.

The inclination angle according to the refractive index described above is according to Snell's law, and this is expressed as an equation as in Equation 1 below.

In Equation 1, sinθ ₁ may be an incidence angle or a refraction angle of light in the first medium having a first refractive index n1, and sinθ ₂ may be a refraction angle or an incidence angle of light in the second refractive index n2.

As described above, in the optical guide portion of the three-dimensional display device of the present embodiment, the inclined surface of the pattern of the three-dimensional effect forming portion is an inclination angle capable of appropriately reflecting or refracting incident light, and is about 5° as small as about 85 degrees. It can be prepared in degrees.

In addition, in this embodiment, the pattern 22 may limit the width w to the height h between adjacent pattern units at a predetermined ratio. The width w may be a predetermined interval, that is, a pitch between two adjacent pattern units. For example, when a pattern is designed to emphasize the depth of linear light, the width w is provided to be equal to or smaller than the height h. In addition, when a pattern is designed to represent a relatively long image in linear light, the width w may be provided to be greater than the height h.

If the width-to-height ratio (h/w) of the pattern 22 is designed to be less than 1, the depth of the concave portion is lower than that of 1 or more, and pattern manufacturing is difficult. It can be easy.

The width w of the above-described pattern 22 may be about 10 μm to about 500 μm. The width w may be an average interval between two adjacent pattern units in the x direction, and may be adjusted according to a pattern design, an arrangement structure, or a desired shape of an optical image.

According to the present embodiment, by designing the pattern 22 by using the width (w) and the height (h) of the pattern 22 as a characteristic adjustment factor, various optical images by three-dimensional effect linear light to be implemented are efficiently and It can be easily controlled.

Referring to FIG. 14, in the optical member of this embodiment, the pattern 22 of the three-dimensional effect forming unit 20 has a pattern structure having a polygonal cross-sectional shape. That is, the inclined surface 221 of the pattern 22 has a line graph shape.

The inclined surface 221 of the pattern 22 is a plurality of inclined angles (θ1, θ2) according to the number of line segments in the line graph in the thickness direction of the optical guide portion or in a direction perpendicular to the first surface 12 of the optical guide portion (z direction). Can have The second inclination angle θ2 may be greater than the first inclination angle θ1. The first or second inclination angles θ1 and θ2 may be designed within a range greater than about 5° and less than about 85°.

The three-dimensional effect forming part 20 of this embodiment may include a spacer 222 provided between two adjacent pattern units. For example, when the pattern 22 includes a first pattern unit (Cm-1), a second pattern unit (Cm), and a third pattern unit (Cm+1) (where m is a natural number of 2 or more) , The three-dimensional effect forming unit 20 is a space provided between the first pattern unit (Cm-1) and the second pattern unit (Cm) and between the second pattern unit (Cm) and the third pattern unit (Cm+1) It may include a part 222.

The width w1 of the spaced portion 222 is smaller than the width w of the pattern 22. In order to realize a natural linear light on the three-dimensional effect forming part 20, the width w1 of the spacer 222 may be several μm or less, or may be designed to be less than about 1/5 of the width w of the pattern.

In addition, the three-dimensional effect forming unit 20 of the present exemplary embodiment may have a cut surface 223 substantially parallel to the first surface 12 of the optical guide unit on the pattern 22. The cut surface 223 is a part that does not act so that light is emitted to the outside by reflection or refraction of incident light, and the linear light implemented by the pattern 22 has a cut part corresponding to the cut surface 223. Therefore, the width w2 of the cut surface 223 may be appropriately designed in a range of several μm or less in order to realize a three-dimensional effect linear light having a natural and continuous shape.

Referring to FIG. 15, in the three-dimensional display device of the present embodiment, the pattern 22 of the three-dimensional effect forming unit 20 has a lenticular, semi-circular cross-section, or semi-elliptical cross-sectional shape. The pattern 22 includes an inclined surface 221 inclined at a predetermined angle in the thickness direction of the light guide part or in a direction perpendicular to the first surface 12 of the light guide part (z direction). The pattern 22 may have a symmetrical shape based on a pattern center line (not shown) in the z direction.

The inclined surface 221 of the pattern 22 may have a structure in which a position on the inclined surface where the incident light BL0 meets varies according to the incident position of the incident light BL0 due to the semicircular cross-sectional structure. That is, since the inclined surface 221 of the pattern 22 of this embodiment is a surface in contact with an arbitrary point on an arc, a tangent line in contact with an arbitrary point on the pattern 22 is perpendicular to the first surface 12 of the optical guide part. It may be placed at a predetermined inclination angle θ in the direction (z direction). The inclination angle θ may be greater than 0° and less than 90° depending on the position on the inclined surface where the incident light BL0 strikes.

In the present embodiment, the pattern 22 of the three-dimensional effect forming unit 20 may further include a spacer 222 provided between two adjacent pattern units. The spacing part 222 is a pattern non-forming part between two adjacent pattern units having a concave shape from the first surface 12 of the pattern layer or the light guide part, and is a part of the first surface 12. Can extend parallel to. The spacer 222 is a gap between pattern units provided for convenience of pattern design or manufacturing process, and may be omitted depending on the material of the optical guide unit, manufacturing process, or pattern design.

On the other hand, when the spacer 222 is disposed, the width w1 of the spacer 222 is designed to be smaller than the width w of the pattern unit of the pattern 22. The width w1 of the spaced portion 222 may be about 1/5 or less or several μm or less of the width w of the pattern 22. If the width w1 of the spaced portion 222 is greater than or equal to the width w of the pattern 22, a linear light having a cut portion in the pattern 22 may be implemented.

In particular, when the pattern 22 is in a lenticular shape, the ratio of the width (w) (or diameter) to the height (h/w) of the pattern 22 is about 1/2 or less for easy implementation of linear light. It may be designed so that the inclination angle θ of the inclined surface is about 60° or less.

On the other hand, the cross section of each pattern in the above-described embodiment has been described mainly in the case of a triangular, polygonal, or semicircular shape, but the present invention is not limited to such a configuration, and In the case of a structure emitting in the direction of one side or the direction of the second side, a combination shape or any other structure may be applied in addition to the cross-sectional structure of the above-described straight, curved and line graph shapes.

16 is a schematic plan view illustrating a lighting device according to still another embodiment of the present invention.

Referring to FIG. 16, the lighting device 300 according to the present embodiment includes a light guide unit for inducing incident light, a three-dimensional effect forming unit 20 disposed on a first surface of the light guide unit, and a second surface of the light guide unit. It includes a diffusion induction unit 50 disposed on the top.

The three-dimensional effect forming unit 20 includes patterns 22 disposed on different regions of the optical guide unit 10 and extending integrally, and the pattern 22 is in a direction for defining the optical path of the linear light. It includes a plurality of pattern units that are sequentially arranged, and each pattern unit has an inclined surface having an inclined angle with respect to the first surface.

The diffusion induction part 50 is arranged so as not to be visible from the front by covering a plurality of LED packages of the light source unit disposed at the edge of the pattern 22.

When power is supplied to the light source, while the LED package is covered by the diffusion induction unit 50 arranged on the upper side of the LED package, the diffusion induction unit 50 absorbs hot spot light by the LED package or the emission light emitted from an unwanted position. Plane light is realized by inducing diffusion. Of course, a plurality of three-dimensional effect linear lights converted from incident light of each LED package may be displayed in the center of the annular planar light (see FIG. 17).

Meanwhile, when the lighting device according to the present embodiment is used as a headlamp, which is a vehicle lamp, the lighting device 300 may be implemented to further include an outer lens 310. In this case, the outer lens 310 may be disposed to cover the light guide unit and the diffusion guide unit 50, and may be provided integrally with the diffusion guide unit 50 according to implementation.

17 is an exemplary view showing an operating state of a comparative example for explaining the operating principle of the lighting device of FIG. 16.

As shown in FIG. 17, in the lighting device of the comparative example, each LED package includes two or three LED elements, and outputs two or three incident lights, and the incident light is a three-dimensional effect linear light by a pattern. Is converted to and displayed.

On the other hand, in the lighting apparatus 300A of the comparative example, since the diffusion induction part (refer to reference numeral 50 in FIG. 16) is not provided, a hot spot of the emitted light by the LED package is observed from the upper side of the LED package. The hot spot of the outgoing light may be converted into planar light using any one of the above-described embodiments of the present invention and displayed.

18 is an exemplary view of a lighting device according to another embodiment of the present invention.

Referring to FIG. 18, the lighting device 300B according to the present embodiment implements a double ring-shaped planar light at the edge of the lighting device using a stacked structure of three ring-shaped reflectors.

In addition, in the present embodiment, each LED package includes two LED elements and outputs two incident lights, and these incident lights are converted into three-dimensional effect linear light by a pattern and displayed.

According to the present embodiment, an optical image having a plurality of surface light source bands can be implemented by using a plurality of diffusion induction parts or reflector shapes. In addition, by adjusting the thickness, color, and material of the diffusion induction part or the reflector, it can be implemented so that the planar light can be classified in the form of a strip. It is possible to implement a multi-band type of flat light.

As described above and shown in connection with a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, without departing from the scope of the technical idea It will be well understood by those of ordinary skill in the art that a number of suitable modifications and variations are possible for the present invention. Accordingly, all such suitable modifications, modifications and equivalents should be considered to be within the scope of the present invention.

10: light guide part
20: three-dimensional effect forming unit
20a: pattern layer
22: pattern
221: slope
30: light source unit
40: reflective layer
50: diffusion induction part
80: separation layer

Claims (17)

Board;
A reflective layer disposed on the substrate;
An optical guide portion having a first surface facing the substrate and a second surface facing the first surface;
A three-dimensional effect forming unit having a pattern inside or on the surface of the light guide unit;
A light source unit disposed on the substrate and including a plurality of light sources embedded in the light guide unit; And
And a diffusion induction part disposed on a second area of the light guide part corresponding to the position of the light source part, and diffusing the light emitted from the light source part to the second surface,
The pattern includes a plurality of pattern units each having an inclined surface arranged in sequence and having an inclined angle with respect to the first surface or the second surface,
The extending direction of the pattern unit and the arrangement direction of the plurality of light sources are parallel to each other,
The diffusion induction unit includes a first reflector and a second reflector facing each other and disposed with a spaced area therebetween,
The first and second reflectors have one end disposed on the second surface and the other end extending inclined outwardly on the second surface. delete delete The method according to claim 1,
The first reflector and the second reflector have a hollow shape in which both edges facing each other are connected to each other, and the other ends of the plurality of diffusion induction units each having the hollow shape are distributed and disposed on the second area of the optical guide unit. Lighting device. The method according to claim 1,
And a diffusion member disposed on the other end of the first and second reflectors, wherein the diffusion member transmits light emitted through the first and second reflectors from one end to the second surface. A lighting device that diffuses on a plane of a predetermined width parallel to the. Board;
A reflective layer disposed on the substrate;
An optical guide portion having a first surface facing the substrate and a second surface facing the first surface;
A three-dimensional effect forming unit having a pattern inside or on the surface of the light guide unit;
A light source unit disposed on the substrate and including a plurality of light sources embedded in the light guide unit; And
And a diffusion induction part disposed on a second area of the light guide part corresponding to the position of the light source part, and diffusing the light emitted from the light source part to the second surface,
The pattern includes a plurality of pattern units each having an inclined surface arranged in sequence and having an inclined angle with respect to the first surface or the second surface,
The extending direction of the pattern unit and the arrangement direction of the plurality of light sources are parallel to each other,
The diffusion induction unit includes a first reflector and a second reflector facing each other and disposed with a spaced area therebetween,
The diffusion inducing unit includes a plurality of pairs of the first reflector and the second reflector surrounding the edge of the second surface of the light guide unit. The method of claim 6,
The first reflector includes a 1-1 reflector and a 1-2 reflector,
The second reflector is a 2-1 reflector paired with the 1-1 reflector, and
Including a 2-2 reflector paired with the 1-2 reflector,
One end of each of the 1-1 reflector, the 2-1 reflector, the 1-2 reflector, and the 2-2 reflector is integrally disposed above the light source of the light source unit. The method according to claim 1 or 6,
Further comprising a separation layer between the pattern and the light guide portion,
The optical guide portion is a resin layer, the three-dimensional effect forming portion is provided as a pattern layer bonded to the first surface of the optical guide portion, the pattern is provided on the first surface of the pattern layer, and the first surface of the pattern layer Is a lighting device in which the separation layer is placed and the resin layer is embedded. The method according to claim 1 or 6,
The plurality of light sources include a first light source and a second light source, and the patterns are provided in different regions, and a first pattern and the second light source for converting first incident light from the first light source into first linear fluorescence A lighting device that converts the different first incident light from and into different first linear fluorescent light, wherein a traveling direction of the first linear light and a traveling direction of the other first linear fluorescent light are different from each other. delete delete delete delete delete delete delete delete

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