KR102172685B1 - Lighting Device - Google Patents

Abstract

The present invention relates to a lighting device capable of increasing light efficiency while giving a change to an optical image in the form of a simple surface light source. The lighting device includes a first surface, a second surface opposite to the first surface, and between the first surface and the second surface. The light guide unit having an inclined side of the light guide unit, a printed circuit board on the first surface of the light guide unit, and a light source mounted on the printed circuit board and supplying internal light into the light guide unit, and the inclined side is internal light Is reflected to generate outgoing light traveling in the direction of the second surface facing the second surface.

Description

Lighting Device}

The present invention relates to a lighting device capable of increasing light efficiency while changing an optical image in the form of a simple surface light source.

LED (Light Emitting Diode) is a device that converts an electrical signal into light using a compound semiconductor. 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.

An example of a conventional lighting device using an LED light source is disclosed in Korean Laid-Open Patent Publication No. 10-2012-0009209. The lighting device of this publication is a side-illuminated backlight device in which a plurality of LED light sources are disposed on one side of a light guide plate, and minimizes luminance deviation in a light control plane by diffusing light that is posted between the reflective film and the light guide plate and leaks upward in the left and right directions.

However, the prior art of the above publication is limited in reducing the thickness of the lighting device due to the thickness of the light guide plate itself by using the light guide plate, and because the light guide plate itself is not flexible, it is difficult to apply to a flexible or curved lighting device, etc., and product design And there is a disadvantage that the design is not easy to change.

In addition, some conventional lighting devices have a simple surface light source shape, so there is a limit to expressing only a light image with a monotonous atmosphere. In addition, some lighting devices of the prior art have a disadvantage in that the light efficiency is deteriorated due to the large loss of light due to the light distribution unit on the side of the light guide plate.

An embodiment of the present invention is to provide a lighting device capable of implementing various light images by changing a simple surface light source image of an existing lighting device.

Another embodiment of the present invention is to provide a lighting device capable of improving light efficiency while preventing light loss from occurring in a side light distribution part of a light guide part made of a light guide plate or a resin layer.

In order to solve the above-described problem, the lighting device according to an aspect of the present invention includes a first surface, a second surface opposite to the first surface, and a light guide unit having an inclined side surface between the first and second surfaces. , A printed circuit board on a first surface of the light guide part, and a light source mounted on the printed circuit board and supplying internal light into the light guide part. The inclined side reflects the internal light to generate outgoing light traveling in the direction of the second surface facing the second surface.

In one embodiment, the inclined side is provided at the edge of at least one outer surface of the light guide portion.

In one embodiment, the light source extends between the first surface and the second surface, and is located at a central portion opposite to the inclined side (first inclined side), another inclined side (second inclined side), or near the first side. It is disposed and irradiates internal light from the center, the second inclined side, or from the first side toward the first inclined side.

In one embodiment, the lighting device further comprises a pattern on the second side of the light guide portion. The pattern is disposed between an array of a plurality of LED elements forming a light source, and functions to cover a part of the emitted light emitted toward the second surface.

In one embodiment, the lighting device further comprises a diffusing lens on the light guide portion. The diffusion lens diffuses outgoing light reflected from the inclined side to the front surface of the second surface.

In one embodiment, the lighting device further includes a reflective pattern protruding into the light guide portion and disposed between the central portion and the inclined side. The reflection pattern reflects some of the internal light in the direction of the second surface.

In one embodiment, the light source includes a plurality of LED elements disposed at an edge portion, and the plurality of LED elements each generate internal light passing through the center at the edge portion. Here, the lighting device may further include a diffusion lens on the light guide unit.

According to the present invention, it is possible to provide a lighting device that implements illumination of various light images by changing a simple surface light source image of an existing lighting device.

That is, according to this embodiment, a light source image can be implemented along the outline of the lighting device by applying a certain level of inclination or curvature to the light distribution unit, and various images are implemented by changing the tilt and curvature direction of the light distribution unit. You can adjust the level. In addition, it is possible to implement an optical image in the form of a continuous or discontinuous line or plane by the arrangement of the LED elements and the shape of the printed circuit board. In addition, it is possible to effectively implement an optical image of a line or a combination of surfaces in the light emitting surface through the pattern on the upper part of the optical guide.

Further, according to the present invention, it is possible to provide a lighting device having excellent light efficiency characteristics while preventing light loss from occurring in the side light distribution portion of the light guide portion made of a light guide plate or a resin layer.

1 is a perspective view of a lighting device according to an embodiment of the present invention
2 is a plan view of the lighting device of FIG. 1
3 is a partial cross-sectional view of a portion A1 of the lighting device of FIG. 1
4 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 1
5 is a plan view of a lighting device according to another embodiment of the present invention
6 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 5
7 is a plan view of a lighting device according to another embodiment of the present invention
FIG. 8 is a partial cross-sectional view taken along lines VIII-VIII of the lighting device of FIG. 7
9 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 7
10 is a perspective view of a lighting device according to another embodiment of the present invention
11 is a cross-sectional view of the lighting device of FIG. 10 taken along line XI-XI
12 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 10
13 is a perspective view of a lighting device according to another embodiment of the present invention
14 is a cross-sectional view taken along line XIV-XIV of the lighting device of FIG. 13
15 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 13

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. 2 is a plan view of the lighting device of FIG. 1.

Referring to FIG. 1, the lighting device 100 according to the present embodiment includes a light guide unit 10, a printed circuit board 20, and a light source 30.

The optical guide unit 10 guides internal light from one side to the other side by total reflection. In this embodiment, the light guide unit 10 has a disk shape with an empty center. The optical guide unit 10 has a first surface and a second surface opposite to the first surface. In addition, a side surface and an inclined side surface 14 are provided between the first and second surfaces. The side surface is disposed at the edge of the center, and the inclined side surface 14 is disposed at the edge of the disk structure facing the center. Hereinafter, the inclined side is referred to as an inclined side.

The cross section of the inclined side surface 14 may have a straight line, a broken line, or a curved shape. However, the inclined side surface 14 reflects the internal light moving between the first surface or the second surface of the optical guide unit 10 to reflect the first surface of the optical guide unit 10 (see reference numeral 11 in FIG. 3). The internal light proceeds in the direction (hereinafter referred to as the first surface direction) or the second surface of the optical guide unit 10 (refer to the reference numeral 12 in FIG. 3) (hereinafter referred to as the second surface direction). If a structure capable of functioning to refract a direction may have a combination of these or other cross-sectional shapes other than a straight line, a broken line, and a curved shape, there is no need to be limited to a specific cross-sectional shape.

The light guide unit 10 may be formed of a transparent material, such as glass or resin. The light transmittance of the transparent material may be about 50% or more, preferably about 80% or more in consideration of light efficiency. In the case of using a resin, the optical guide unit 10 may be formed of an ultraviolet curing resin including an oligomer. The oligomer includes any one material selected from Urethane Acrylate, Epoxy Acrylate, Polyester Acrylate, and Acrylic Acrylate.

The thickness of the optical guide portion 10 is about 0.1 mm or more and about 10.0 mm or less. The thickness may correspond to a minimum thickness or a maximum thickness between the first and second surfaces. If the thickness of the light guide portion 10 is less than 0.1 mm, when using the LED element as a light source, there is a difficulty in manufacturing the height of the LED element less than about 100 μm, and due to the thin thickness, the light output amount of the LED element And the light efficiency or lighting performance of the device may be reduced. In addition, if the thickness of the light guide unit 10 is greater than 10.0 mm, the thickness and weight of the device increases according to the size or area of the lighting device 100, making it difficult to store, transport, and handle, and may cause an increase in material costs. have.

The printed circuit board 20 is connected to the light source 30 to supply power or a driving signal. The printed circuit board 20 may be provided in a rigid or flexible type. The printed circuit board 20 is disposed near the center of the first surface of the optical guide unit 10. In addition, the printed circuit board 20 may be disposed to extend to the edge of the first surface of the optical guide unit 10 according to implementation.

The light source 30 is mounted on the printed circuit board 20. The light source 30 includes eight LED elements arranged in the shape of a protrusion or a cogwheel in the center of the circular shape of the light guide unit 10. The eight LED elements are arranged to radiate internal light radially from the center of the light guide unit 10 toward the edge where the inclined side surface 14 is located.

The LED element of the light source 30 may be a top view type or a side view type, but is not limited thereto. When the LED element is used, the light source can output light with strong linearity as internal light.

On the other hand, it is preferable to use an LED element as a light source, but is not limited thereto. Depending on the implementation, the light source may be another light source (halogen lamp, metal lamp, etc.) or the end of the light guide pipe (or nozzle) that induces light from another light source (sunlight, etc.) and irradiates it from the center of the light guide unit 10 toward the edge. ) Can be.

According to the present embodiment, internal light of the light source 30 disposed in the center of the light guide unit 10 by the inclined side surface 14 of the light guide unit 10 is removed only from the edge of the light guide unit 10. A ring-shaped or halo-shaped illumination that reflects and displays in two directions can be implemented.

In FIGS. 1 and 2 of the present embodiment, the central portion of the optical guide portion 10 is shown in a hollow shape, but the present invention is not limited thereto, and the central portion of the optical guide portion 10 extends to the second surface to extend the hollow portion. It can be implemented in the form filled with.

3 is a partial cross-sectional view of a portion A1 of the lighting device of FIG. 1.

Referring to FIG. 3, in the lighting device of this embodiment, the inclined side surface 14 of the light guide unit 10 is inclined at a predetermined angle θ1 with respect to the first surface 11 or the second surface 12. I can. In this case, the internal light L1 guided from the center portion to the edge portion inside the optical guide portion 10 is converted into an outgoing light L2 that hits the inclined side surface 14 and proceeds in the direction of the second surface.

According to the above-described inclined side (14), the optical guide unit 10 does not emit the internal light (L1) to the outside in most areas, only the inclined side (14) to the outside light (L1) Optical images can be implemented.

According to this embodiment, various silhouette shapes such as circle, triangle, square, pentagonal or larger polygon, star shape, half moon shape, human shape, animal shape, plant shape, mountain shape, object shape, etc. can be easily implemented by lighting. have.

4 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 1.

When the illuminance of the lighting device 100 of the present embodiment is measured, as shown in Fig. 4(a), a red ring or ring-shaped optical image can be confirmed. The red ring-shaped optical image portion is light irradiated to the inclined side surface 14 of the optical guide portion 10, and the remaining portions appear black because the light cannot be emitted.

The red optical image is because a red LED element is used as the light source 30, and a yellow or blue ring-shaped optical image can be implemented by using a yellow or blue LED element. In addition, by using LED devices of at least two colors of yellow, blue, and red, it is possible to implement an optical image of white or close to white color.

In addition, when the illuminance of the lighting device 100 of the present embodiment is measured, as shown in FIG. 4(b), an optical image in the form of a red halo or a total solar eclipse can be confirmed.

Here, the illuminance is the amount of light that the light source irradiates inside the light guide part, and the luminance refers to the amount of light reflected by the light of the light source that reaches the inclined side of the light guide part. According to the measurement criteria for illuminance and luminance, the optical image of the lighting device can implement different types of optical images according to the illuminance or luminance measurement.

In this embodiment, the illuminance is measured at 1 meter in front of the lighting device 100 using an illuminator, and the luminance is measured at 1 meter in front of the lighting device 100 using a luminance meter.

According to the present embodiment, it is possible to implement an optical image in the form of a continuous line along the inclined side of the light guide unit according to the arrangement of light sources in the light guide unit.

5 is a plan view of a lighting device according to another embodiment of the present invention.

Referring to FIG. 5, the lighting device 200 according to the present embodiment includes an optical guide unit 10, a printed circuit board, and a light source 30.

The light guide part 10, the printed circuit board, and the light source 30 of the lighting device 200 of the present embodiment are shown in FIG. 1 except that the light source 30 is disposed at the edge of the optical guide part 10 in the form of a disc. It is substantially the same as the corresponding component of the lighting device 100 described above with reference to FIG. 3.

The light source 30 is disposed from the edge portion of the disk-shaped optical guide portion 10 toward the center. The light source 30 includes twelve LED elements spaced apart from each other at a predetermined interval and arranged at regular intervals at the edge of the light guide unit 10. The 12 LED elements are arranged to irradiate internal light from the edge where the one side inclined side 14 of the light guide unit 10 is located, passing through the center and toward the opposite edge where the other side inclined side 14 is located. Here, the inclined side of one side refers to an inclined side located on one side of the optical guide unit 10 having a disk structure, and the inclined side of the other side refers to an inclined side located on the other side of the optical guide unit 10 that is the opposite side . One side inclined side and the other side inclined side may be continuously disposed along the edge of the disk-shaped optical guide unit 10.

6 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 5.

When the illuminance of the lighting device 200 of this embodiment is measured, a red ring-shaped optical image as shown in Fig. 6(a) can be confirmed. In such a ring-shaped optical image, the internal light of the light source 30 located at one edge passes through the center of the light guide unit 10 and passes next to the light source 30 located at the other edge of the other side inclined side 14 This is because the outgoing light is formed at the edge of the light guide unit 10 by reflection. That is, when the LED elements located at the edge of the optical guide portion 10 in the shape of a disk from 1 o'clock to 12 o'clock irradiate the internal light toward the center of the optical guide portion 10, the internal light crosses each other and one side After moving to the other side via the center of the light guide unit 10, it is refracted by colliding with the inclined side surface 14 of the light guide unit 10, and is emitted in the direction of the second surface of the light guide unit 10 to be converted into a ring-shaped optical image.

In addition, when the luminance of the lighting device 200 of the present embodiment is measured, an optical image in the shape of a dotted ring as shown in Fig. 6(b) can be confirmed. In such a dotted ring-shaped optical image, the internal light of the light source 30 located at one edge passes through the center of the optical guide unit 10 and passes the side of the light source 30 located at the other edge, and the other side inclined side surface 14 This is because the outgoing light is formed at the edge of the light guide part 10 by reflecting it from. Here, the red dots of the dotted ring-shaped optical image are located corresponding to the first area between the LED devices disposed adjacent to each other, and the black part between the red dots is where the internal light is blocked or blocked by the LED devices. As a part, it is located corresponding to the second area where the LED element is located.

According to the present exemplary embodiment, an optical image in the form of a discontinuous line can be implemented on the inclined side of the optical guide according to the arrangement of light sources in the optical guide.

7 is a plan view of a lighting device according to another embodiment of the present invention.

Referring to FIG. 7, the lighting device 300 according to the present embodiment includes a light guide unit 10, a printed circuit board, a light source 30, and a pattern layer 310.

In the lighting device 200 of this embodiment, the light guide unit 10, the printed circuit board, and the light source 30 are arranged with a pattern layer 310 between an array of a plurality of LED elements in the disc-shaped light guide unit 10 Except for that, it is substantially the same as the corresponding component of the lighting device 100 described above with reference to FIGS. 1 to 3.

The pattern layer 310 is disposed on the light guide part 10 for convenience of a manufacturing process, but is not limited thereto, and may be provided in a form embedded in the light guide part 10.

FIG. 8 is a partial cross-sectional view of the lighting device of FIG. 7 taken along lines VIII-VIII.

Referring to FIG. 8, the pattern layer according to the present embodiment includes a first film substrate 41, a second film substrate 42, and a pattern 43. In addition, the pattern layer may further include an adhesive pattern 44.

The pattern layer is for changing a continuous linear optical image implemented on the inclined side 14 of the optical guide unit 10 into a discontinuous linear optical image.

In this embodiment, the pattern layer includes a first film substrate 41, a second film substrate 42, and a pattern 43 between the first film substrate and the second film substrate. The pattern 43 is disposed between the first film substrate 41 and the second film substrate 42 and is protected by them. The pattern 43 is disposed to cover some light images between adjacent LED elements when viewed from the light exit surface that is the front of the lighting device 300.

PET (Polyethylene Terephthalate) or PES (Poly Ether Sulfones) may be used as the material of the first film substrate 41 or the second film substrate 42.

The pattern 43 may be provided as an adhesive pattern between the first film substrate 41 and the second film substrate 42. In that case, the pattern 43 becomes an adhesive pattern, and a separate adhesive pattern 44 may be omitted. In addition, in another implementation, the pattern 43 may be prepared by printing with a predetermined ink on one surface of the first film substrate 41 or the second film substrate 42. In that case, it is possible to omit any one of the first film substrate 41 and the second film substrate 42, and when two film substrates are used, a separate adhesive pattern 44 or an adhesive layer may be used as the first film substrate. It may be added between (41) and the second film substrate (42).

9 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 7.

When the illuminance of the lighting device 300 of the present embodiment is measured, a red discontinuous ring-shaped optical image as shown in FIG. 9(a) can be confirmed. In such a discontinuous ring-shaped optical image, the internal light of the light source 30 located at the center of the optical guide unit 10 is reflected from the inclined side surface 14 located at the edge of the optical guide unit 10 to reflect the light guide unit ( This is because the outgoing light is formed from the edge of 10) in the direction of the second surface, and at this time, a partial region of the ring-shaped outgoing light is sparse by the pattern 43.

In addition, when the luminance of the lighting device 300 of the present embodiment is measured, an optical image having a discontinuous halo shape or a total solar eclipse shape as shown in FIG. 9(b) can be confirmed. In this optical image, the light reflected from the edge of the light guide unit 10 is partially covered by the pattern 43 between the plurality of LED elements of the light source 30, and the pattern according to the material of the pattern 43 It is guided by 43 and formed by light emitted from one end of the pattern 43. Here, one end of the pattern 43 is located in the center of the light guide part 10, and the other end of the pattern 43, which is the opposite side of the one end, is located at the edge of the light guide part 10.

According to the present embodiment, a continuous linear optical image is realized on the inclined side of the optical guide by the arrangement of light sources in the optical guide, and a continuous linear optical image is discontinued by arranging a pattern on the upper portion of the optical guide. It can be expressed by converting it into an optical image in the form of a typical line. In addition, it is possible to implement a modified lighting device in which a plurality of dot-shaped optical images are included in a ring-shaped optical image using a pattern.

10 is a perspective view of a lighting device according to another embodiment of the present invention. 11 is a cross-sectional view of the lighting device of FIG. 10 taken along line XI-XI.

Referring to FIGS. 10 and 11, the lighting device 400 according to the present embodiment includes an optical guide unit 10, a printed circuit board 20, a light source 30, and a diffusion lens 50.

The light guide unit 10 includes the lighting device 100 of FIGS. 1 and 2, the lighting device 200 of FIG. 5, or the lighting device 200 of FIGS. 7 and 8 except that the cross section of the inclined side 14a has a curved shape. It is substantially the same as the light guide part of the lighting device 300. The inclined side surface 14a having such a curved cross-sectional shape is applicable to the light guide portion of the lighting device 100, 200 or 300 of the above-described embodiment. Of course, the inclined side surface of the light guide unit 10 of the present embodiment may be implemented as a straight cross-sectional shape, for example, a 45° inclined side in addition to a curved cross-sectional shape.

The printed circuit board 20 and the light source 30 are substantially the same as the printed circuit board and the light source of the above-described lighting device 100, 200 or 300. That is, in this embodiment, the light source 30 is disposed at the edge of the light guide unit 10, but is not limited thereto, and the light source 30 is the center of the light guide unit 10 as shown in FIGS. Similar effects can be obtained even when placed in.

The diffusing lens 50 controls the light emitted from the inclined side surface 14a located at the edge of the optical guide unit 10 and emitted toward the second surface of the optical guide unit 10. Spread it all over two sides.

The diffusing lens 50 realizes a circular optical image by increasing the reflectance and the diffusivity of the outgoing light, thereby improving the luminance of the lighting device. To this end, the diffusing lens 50 may have a lens structure, and a predetermined amount of a light diffusing body (not shown) may be distributed therein. The light diffuser may be composed of any one selected from silicon (sillicon), silica (silica), glass bubble, PMMA, urethane (urethane), Zn, Zr, Al2O3, and acrylic. When the light diffuser has a bead structure, the particle diameter of the bead may range from about 1 μm to about 20 μm, but is not limited thereto.

12 is a view showing illuminance and luminance in an operating state of the lighting device of FIG. 10.

When the illuminance of the lighting device 400 of the present embodiment is measured, it is possible to check an optical image in which the outgoing light is diffused inside a continuous red ring shape as shown in FIG. 12(a). This optical image is reflected from the inclined side surface 14a located at the edge of the optical guide unit 10, and the diffusion lens 50 reflects the light emitted toward the second surface of the optical guide unit 10 to the front of the second surface. It is obtained by a diffuse structure.

In addition, when the luminance of the lighting device 300 of the present embodiment is measured, an optical image of a circular button shape or a hollow hemispherical shape as shown in FIG. 12(b) can be confirmed.

According to the present embodiment, the light emitted from the light guide unit is diffused on the entire surface of the light exit surface through the diffusion lens stacked on the light guide unit, so that a linear optical image can be converted into a surface type optical image. In this case, the surface-shaped optical image may have an optical image structure having a higher brightness than other portions in which the edge portion and the central portion where the inclined side is located.

13 is a perspective view of a lighting device according to another embodiment of the present invention. 14 is a cross-sectional view taken along line XIV-XIV of the lighting device of FIG. 13.

13 and 14, the lighting device 500 according to the present embodiment includes an optical guide unit 10, a printed circuit board 20, a light source 30, and a reflection pattern 510.

In the lighting device 500 of the present embodiment, the light guide unit 10, the printed circuit board 20, and the light source 30 have a reflective pattern 510 disposed between the light incident unit and the light distribution unit in the light guide unit 10. Except for that, it is substantially the same as the corresponding component of the lighting device 100 described above with reference to FIGS. 1 to 3.

The central portion of the optical guide portion 10 may be provided with a hollow portion 16, in which case, the printed circuit board 20 disposed on the first surface of the optical guide portion 10 is also a hollow portion 16 It may have an opening corresponding to. Of course, the printed circuit board 20 may be disposed in a form that does not have an opening as shown in FIG. 1 and closes the hollow portion 16.

The reflective pattern 510 is disposed between the light incident part and the light distribution part. The light incident part may correspond to the exit surface of the light source 30, and the light distribution part may correspond to the inclined side surface 14 of the light guide part 10. The reflective pattern 510 functions to reflect a part of the internal light moving from the light incident part to the light distribution part therebetween so that the reflected light is emitted in the direction of the second surface.

The reflective pattern 510 is provided in a form in which a part of the first surface of the light guide unit 10 is removed. In this case, the reflective pattern 510 is provided in a shape having a predetermined inclined side so as to reflect internal light traveling between the first and second surfaces of the optical guide unit 10 in the direction of the second surface. For example, the reflective pattern 510 may be provided in a ring shape having a V-cut cross section on the first surface of the optical guide unit 10 in the form of a disk. According to this reflection pattern 510, a part of the internal light emitted from the light source 30 located in the center of the light guide unit 10 is reflected by the reflection pattern 510 and is emitted toward the second surface, and the rest of the internal light is After being reflected from the inclined side surface 14 through the upper part of the reflective pattern 510, it may be emitted toward the second surface.

Meanwhile, the reflective pattern 510 is not limited to a shape in which a part of the first surface of the optical guide unit 10 is removed. For example, the reflective pattern 510 may have an arc-shaped cross section or a lenticular shape and may be provided in a form that continuously or intermittently surrounds the light source 30 located at the center of the light guide unit 10.

15 is a diagram showing illuminance and luminance in an operating state of the lighting device of FIG. 13.

When the illuminance of the lighting device 500 of the present embodiment is measured, a red continuous double ring-shaped optical image as shown in FIG. 15(a) can be confirmed. This optical image is reflected from the inclined side surface 14 located at the edge of the optical guide unit 10 and is reflected by the first emission light and the reflection pattern 510 coming out of the second surface direction of the optical guide unit 10. It is obtained by the second light emitted in the direction of the second surface of the light guide unit 10.

In addition, when the luminance of the lighting device 500 of the present embodiment is measured, as shown in Fig. 15(b), a second image of a continuous ring shape is added to the inside of the first image of the shape of a halo or total solar eclipse. You can check.

According to this embodiment, an optical image in the form of a continuous double line or an optical image in the form of a total solar eclipse having an inner ring image is obtained by a reflective pattern disposed between the light incident part and the light distribution part and the light distribution part (inclined side) of the light guide part. Can be implemented.

Meanwhile, in the above-described embodiment, for convenience of explanation, the light guide portion has been mainly described, but the present invention is not limited to such a configuration, and may have a hexahedral shape or a plate shape of various shapes, in which case the light source is Among the various side surfaces of the light guide unit, the light guide may be disposed near the first side of at least one of the other inclined side facing the inclined side or the side that is not inclined to irradiate light to the inclined side. Here, the inclined side may be referred to as a first inclined side, and the other inclined side may be referred to as a second inclined side, and the first side is a surface orthogonal to the first or second side, and the first or second side It may be a plane that does not have an inclination angle inclined at an acute angle to.

According to the above-described embodiment, the lighting device can be used for indoor and outdoor general lighting, design illumination, vehicle lamps, instrument panels, and the like. When used as a vehicle lamp, the lighting device can be easily applied to vehicle lamps such as headlights, rear lights, vehicle interior lighting, fog lights, door scarves, and dashboard lights. That is, according to the present embodiment, it is possible to provide a new vehicle lighting device that is advantageous in terms of volume, thickness, weight, price, life, stability, design freedom, and ease of installation compared to existing vehicle lamps.

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: optical guide portion 14, 14a: inclined side
20: printed circuit board 30: light source
43: pattern 50: diffusion lens
100, 200, 300, 400, 500: lighting device
310: pattern layer 510: reflection pattern

Claims (11)

Printed circuit board;
An optical guide part having a disk shape and disposed on the printed circuit board and including a lower surface, an upper surface, and an inclined side surface disposed between the lower surface and the upper surface;
Includes; a plurality of light sources mounted on the printed circuit board and disposed in the center of the optical guide unit,
The inclined side is disposed at an edge portion opposite to the central portion of the optical guide portion,
The plurality of light sources are disposed at equal intervals along the circumference of a concentric circle from the virtual center,
Each of the plurality of light sources includes a light exit surface facing the inclined side surface,
The light exit surfaces of each of the plurality of light sources are disposed in different directions,
Each of the plurality of light sources supplies internal light to the inside of the light guide part from the inclined side in an emission direction,
The inclined side surface reflects the internal light to generate an outgoing light traveling toward the top surface. The method according to claim 1,
The internal light is reflected from the edge portion toward the upper surface of the optical guide portion by the inclined side surface of the optical guide portion,
When viewed in a plan view, the light emitted toward the upper surface of the light guide unit has a ring shape or a halo shape. delete The method according to claim 1,
Further comprising a pattern disposed on the upper surface of the light guide part,
The pattern is a lighting device that covers a part of the light emitted toward the top surface. The method according to claim 1,
Further comprising a diffusion lens on the light guide portion,
The diffusing lens is a lighting device that diffuses outgoing light reflected from the inclined side to the front surface of the upper surface of the light guide part. The method according to claim 1,
Further comprising a reflective pattern protruding into the light guide portion and disposed between the central portion and the inclined side,
The reflective pattern reflects a portion of the internal light toward an upper surface of the light guide unit. Printed circuit board;
An optical guide part having a disk shape and disposed on the printed circuit board and including a lower surface, an upper surface, and an inclined side surface disposed between the lower surface and the upper surface;
Includes; a plurality of light sources mounted on the printed circuit board and disposed at equal intervals along a concentric circle shape from the virtual center,
The inclined side is disposed at an edge portion opposite to the central portion of the optical guide portion,
The plurality of light sources are disposed adjacent to the edge portion than the central portion of the light guide portion,
Each of the plurality of light sources includes a light exit surface,
The plurality of light sources are disposed such that the light exit surface faces the center of the light guide part,
Each of the plurality of light sources supplies internal light to the interior of the light guide part in an emission direction from the center of the light guide part,
The inclined side surface reflects the internal light to generate an outgoing light traveling toward the top surface. The method of claim 7,
Further comprising a diffusion lens disposed on the light guide portion,
The diffusing lens is a lighting device that diffuses outgoing light reflected from the inclined side to the front surface of the upper surface of the light guide part. delete The method according to claim 1,
The light guide part is a lighting device of a glass or resin layer. The method of claim 10,
The light source is a lighting device including an LED (Light Emitting Diode) device.

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