KR102679248B1 - Lighting apparatus - Google Patents

Abstract

A lighting device according to an embodiment includes a light guide plate; and a light emitting member disposed on one side of the light guide plate, wherein the light emitting member includes a light source and a plurality of light transmitting units connected to the light source, and on one side of the light guide plate, a plurality of light emitting members that are concave with respect to the one side. Grooves are formed, the light transmitting units include one end and another end connected to the light source, and at least a portion of one end of the light transmitting units is disposed inside the groove.

Description

lighting device{LIGHTING APPARATUS}

The embodiment relates to a lighting device.

A lighting device is a device that can supply light or control the amount of light, and surface lighting is used in various fields. For example, area lights can be placed inside or outside a building to convey visual effects or information. In addition, surface lighting can be used for headlights or taillights outside the vehicle, and can be placed inside the vehicle to provide information about the vehicle to the user, and can also be used for interior purposes.

With such surface illumination, light emitted from a light source may be emitted in a vertical direction through a light guide plate and a diffusion sheet. Additionally, a pattern, etc. is formed on the surface lighting, and the pattern can be viewed from the outside by light emitted from the light source. In other words, the surface lighting can be applied to various switches and indicators placed inside the vehicle, such as the center fascia area, garnish area, door area, and pillar area, etc. within the vehicle by the pattern formed on the surface lighting to provide information to the user. It can also be used as an interior device.

In order to implement such surface lighting, various optical sheets such as light guide plates and diffusion sheets are required to uniformly emit light emitted from the light source upward, and a fixing member or adhesive member is required to connect the light source and the light guide plate. do.

However, when the light source and the light guide plate are connected by the fixing member or the adhesive member, there is a problem in that light leakage occurs in the air gap between the light source and the light guide plate.

Additionally, the light source includes a light source and a light transmitting unit. At this time, a large amount of light transmitting units are required to transmit the light emitted from the light source to the light guide plate, and there is a problem in that the light transmitting units must be manufactured in bundles.

Due to the above-mentioned problems, there is a problem in that it is not easy to design when manufacturing a lighting device, and there is a problem that process efficiency is reduced because a large number of light transmitting units are required.

Therefore, a new lighting device that can solve the above problems is required.

The embodiment seeks to provide a lighting device that prevents light leakage and improves visibility.

A lighting device according to an embodiment includes a light guide plate; and a light emitting member disposed on one side of the light guide plate, wherein the light emitting member includes a light source and a plurality of light transmitting units connected to the light source, and on one side of the light guide plate, a plurality of light emitting members that are concave with respect to the one side. Grooves are formed, the light transmitting units include one end and another end connected to the light source, and at least a portion of one end of the light transmitting units is disposed inside the groove.

The lighting device according to the embodiment may have a groove formed in the light guide plate. In detail, a light emitting member including a light source and a light transmitting portion may be disposed on one side of the light guide plate, and the light transmitting portion may be disposed inside the groove.

Accordingly, the lighting device can minimize the air gap between the light guide plate and the light transmitting portion, thereby preventing light leakage between the light guide plate and the light transmitting portion.

Additionally, the shape of the groove formed in the light guide plate may correspond to the shape of the light transmitting unit. Accordingly, the light transmitting unit may be fixedly disposed within the groove.

Therefore, the lighting device according to the embodiment can prevent light leakage and improve luminance and light uniformity. Additionally, the lighting device according to the embodiment can improve the overall reliability of the lighting device and improve process efficiency because the light transmitting units do not need to be manufactured in bundles.

1 is an exploded perspective view showing a lighting device according to a first embodiment.
FIG. 2 is a perspective view of a light guide plate and a light transmitting unit according to the first embodiment.
FIG. 3 is a cross-sectional view taken along line AA′ of FIG. 2 .
FIG. 4 is a perspective view of a light guide plate and a light transmitting unit according to a second embodiment.
Figure 5 is a cross-sectional view taken along line BB' in Figure 4.
FIG. 6 is a perspective view of a light guide plate and a light transmitting unit according to a third embodiment.
FIG. 7 is a cross-sectional view taken along line CC' of FIG. 6.
8 to 11 are diagrams for explaining an example of how a lighting device according to embodiments is applied and operated in a vehicle.

In the description of the embodiments, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. The description of being formed in "includes being formed directly or through another layer. The standards for top/top or bottom/bottom of each floor are explained based on the drawing.

Additionally, when a part is said to be "connected" to another part, this includes not only cases where it is "directly connected," but also cases where it is "indirectly connected" with another member in between. Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

The thickness or size of each layer (film), region, pattern, or structure in the drawings may be modified for clarity and convenience of explanation, and therefore does not entirely reflect the actual size.

Hereinafter, a lighting device according to an embodiment will be described with reference to the drawings.

1 to 3, the lighting device 1000 according to the first embodiment includes a cover case 100, a light guide plate 200, a light emitting member 300, a reflective member 400, a diffusion member 500, and It may include a pattern member 600.

The cover case 100 may have a shape with an open top. The cover case 100 may accommodate the light guide plate 200, the light emitting member 300, the reflective member 400, the diffusion member 500, and the pattern member 600.

The cover case 100 may include a rigid material. For example, the cover case 100 may include metal. Alternatively, the cover case 100 may include a flexible material. For example, the cover case 100 may include plastic.

The light guide plate 200 may be disposed within the cover case 100 . The light guide plate 200 may emit light incident from the light emitting member 300 upward through total reflection, refraction, and scattering.

A groove 210 may be formed in the light guide plate 200. In detail, the light guide plate 200 includes an upper surface, a lower surface, and at least one side connecting the upper surface and the lower surface, and a plurality of grooves 210 may be formed on at least one surface of the light guide plate 200. For example, the grooves 210 may be formed on one side of the light guide plate 200. The grooves 210 may be formed in a concave shape with respect to one side.

Additionally, the grooves 210 may be formed on one side of the light guide plate 200 and on the top surface of the light guide plate 200. For example, the grooves 210 may be formed on a portion of one side and a portion of the top surface of the light guide plate 200. The grooves 210 may be formed in a concave shape with respect to one side and top surface of the light guide plate 200 .

The grooves 210 may be formed in a concave shape with respect to one side, the upper surface, and an edge where the one side and the upper surface of the light guide plate 200 meet. In detail, the grooves 210 may be formed at a corner where one side and the top surface of the light guide plate 200 meet. That is, the grooves 210 may be formed in a groove form from one side of the light guide plate 200 toward the upper surface of the light guide plate 200. The grooves 210 may be formed on a surface facing the emission surface of the light emitting member 300. The grooves 210 may be formed on the light incident surface of the light guide plate 200.

The thickness of the light guide plate 200 may be 0.3 mm to 3 mm. If the thickness of the light guide plate 200 is less than 0.3 mm, the light incident from the light emitting member 300 cannot be smoothly emitted toward the upper part of the light guide plate 200, and if it exceeds 3 mm, the overall thickness of the lighting device is can be increased.

The light emitting member 300 can generate light. The light emitting member 300 may be disposed on one side of the light guide plate 200. The light emitting member 300 may cause light to enter the light guide plate 200 through one side of the light guide plate 200 .

The light emitting member 300 may include a light source 310 and a plurality of light transmitting units 320.

The light source 310 may be connected to a power source to generate light energy. The light source 310 may be any commonly used light source, such as an incandescent bulb, LED, lamp, mercury lamp, discharge tube, neon lamp, or light bulb. The light source 310 may be used in various colors depending on the user's needs.

The light transmitting units 320 may be connected to the light source 310 and arranged. The light transmitting units 320 may receive light emitted from the light source 310 and transmit the light to the light guide plate 200. The light transmitting units 320 may receive light emitted from the light source 310 and transmit the light to one side of the light guide plate 200.

The plurality of light transmitting units 320 may be arranged to be spaced apart from each other. Alternatively, the plurality of light transmitting units 320 may be arranged to contact each other.

Since the light transmitting unit 320 includes a flexible material, it can be bent and disposed inside the cover case 100. Accordingly, the light transmitting units 320 can be accommodated inside the cover case 100.

The plurality of light transmitting units 320 may be disposed to partially contact the light guide plate 200 . Additionally, a plurality of light transmitting units 320 may be disposed in direct or indirect contact with the light guide plate 200. For example, the light transmitting units 320 may be attached to the light guide plate 200 using an adhesive material.

The light transmitting units 320 may be disposed on the light guide plate 200 . The light transmitting units 320 may be disposed on one side of the light guide plate 200. The light transmitting unit 320 may be disposed on the groove 210. The light transmitting unit 320 may be disposed inside the groove 210. That is, the light transmitting units 320 may be inserted into the groove 210 formed on one side of the light guide plate 200. A portion of the light transmitting units 320 may be disposed inside the groove 210 . For example, each of the light transmitting units 320 may include one end and the other end. The light transmitting units 320 include another end connected to the light source 310 and one end opposite to the other end, and one end of the light transmitting units 320 may be disposed inside the groove 210 . At least a portion of one end of the light transmitting units 320 may be disposed inside the groove 210 . For example, the entire ends of the light transmitting units 320 may be disposed inside the groove 210 . Additionally, one end of the light transmitting units 320 may be partially disposed inside the groove 210 . At this time, one end of the light transmitting units 320 may be disposed inside the groove 210 and in contact with the light guide plate 200 . That is, the light transmitting units 320 are disposed inserted into the groove 210 to receive light emitted from the light source 310 and transmit the light to the light guide plate 200.

The groove 210 may be formed in a concave shape. The groove 210 may be formed in a concave shape with respect to the upper surface of the light guide plate 200. Additionally, the groove 210 may be formed in a concave shape with respect to one side of the light guide plate 200. The shape of the groove 210 may correspond to the shape of the light transmitting unit 320. In detail, the shape of the bottom of the groove 210 may correspond to the shape of the light transmitting unit 320.

The number of light transmitting units 320 may be the same as the number of grooves 210. That is, one light transmitting unit 320 may be inserted and placed in each groove 210. Additionally, the number of light transmitting units 320 may be greater than the number of grooves 210. That is, a plurality of light transmitting units 320 may be inserted and disposed in each groove 210.

The diameter d1 of the light transmitting unit 320 may be 0.01 mm to 10 mm. If the diameter d1 of the light transmitting unit 320 is less than 0.01 mm, it may not be easy to connect the light transmitting unit 320 to the light guide plate 200, and a plurality of devices may be used to ensure visibility of the lighting device. Because the light transmitting unit 320 is required, process efficiency may be reduced. In addition, when the diameter d1 of the light transmitting unit 320 exceeds 10 mm, the air gap area between the light guide plate 200 and the light transmitting unit 320 may widen, resulting in a light leakage phenomenon, and the As the thickness of the light guide plate 200 increases, the overall thickness of the lighting device may increase.

Referring to FIGS. 2 and 3 , the groove 210 may include a plurality of grooves 210 . For example, the plurality of grooves 210 may include a first groove 211 and a second groove 212.

The plurality of grooves 210 may be arranged to be spaced apart from each other. That is, the first groove 211 and the second groove 212 may be arranged to be spaced apart from each other. The distance between the first groove 211 and the second groove 212 may be about 0.05 mm to about 50 mm. If the gap is less than about 0.05 mm, it may not be easy to place the light transmitting unit 320 inside the groove 210, and a plurality of light transmitting units 320 may be required, which may reduce process efficiency. In addition, if the gap exceeds about 50 mm, the overall luminance of the lighting device may decrease, and in order to implement the required luminance, the diameter d1 of the light transmitting portion 320 may increase, thereby reducing the overall thickness of the lighting device. may increase.

The plurality of grooves 210 may be formed in an edge area of the upper surface of the light guide plate 200 and a portion of the side of the light guide plate 200. In the upper surface edge area of the light guide plate 200, the area of the area where the grooves 210 are formed and the area between the grooves 210 are about 0.1% to about 8% of the total upper surface area of the light guide plate 200. You can. If the area is less than 0.1%, it is not easy to connect the light transmitting unit 320 to the light guide plate 200, and the light transmitting unit is not properly fixed in the groove 210, which may reduce the reliability of the lighting device. . For example, the light transmitting unit 320 may be separated from the light guide plate 200 due to an external impact, thereby lowering the overall luminance of the lighting device. Additionally, if the area exceeds 8%, the area of the effective area of the lighting device may decrease.

The light transmitting unit 320 may be inserted and placed in the groove 210. That is, one light transmitting unit 320 may be inserted and placed in each groove 210.

The first light transmitting unit 321 and the second light transmitting unit 322 may be arranged to be spaced apart from each other. In detail, one end of the first light transmitting unit 321 may be disposed to be spaced apart from one end of the second light transmitting unit 322. That is, because the first groove 211 and the second groove 212 are arranged to be spaced apart from each other, the first light transmitting unit inserted into the first groove 211 and the second groove 212, respectively ( 321) One end and one end of the second light transmitting unit 322 may be arranged to be spaced apart from each other. The gap between one end of the first light transmitting unit 321 and one end of the second light transmitting unit 322 may be about 0.05 mm to about 50 mm.

Additionally, the diameter d1 of the light transmitting unit 320 inserted into the groove 210 may correspond to the height h1 of the groove 210. Additionally, the diameter d1 of the light transmitting part 320 may correspond to the width W1 of the groove 210. Accordingly, the light transmitting unit 320 can be inserted and placed inside the groove 210.

A fixing member 700 may be disposed on the light guide plate 200. The fixing member 700 may be disposed on the upper surface of the light guide plate 200. The fixing member 700 may be disposed on an edge area of the light guide plate 200 on the top surface of the light guide plate 200 . The upper surface of the light guide plate 200 includes an overlap area (OR) including an area where the grooves 210 are formed and an area between the grooves 210, and the fixing member 700 includes the overlap area (OR) ) can be placed on the The fixing member 700 may be disposed in direct contact with the upper surface of the light guide plate 200.

The fixing member 700 may have a plate shape. For example, one side of the fixing member 700 facing the light guide plate 200 may have a flat plate shape.

The fixing member 700 may be disposed adjacent to the light transmitting unit 320. That is, since the fixing member 700 is disposed on the overlap region OR where the grooves 210 are formed, it can be disposed in direct or indirect contact with the light transmitting unit 320. For example, the fixing member 700 may be adhered to the upper surface of the light guide plate 200 and the light transmitting unit 320 using an adhesive material.

However, the embodiment is not limited to this, and a plurality of light transmitting units 320 may be inserted and disposed in the groove 210. That is, a light transmission group including a plurality of light transmission units 320 may be inserted and placed in the groove 210. When the light transmission group is inserted and disposed in the groove 210, the height of the light transmission group may correspond to the height h1 of the groove 210, and the width of the light transmission group may be the groove 210. It can correspond to the width (W1) of .

Accordingly, the number of grooves 210 can be reduced, thereby improving process efficiency.

The reflective member 400 may be disposed adjacent to the light guide plate 200. For example, the reflective member 400 may be disposed below the light guide plate 200. At this time, the reflective member 400 may be disposed in contact with the light guide plate 200. In detail, the reflective member 400 may be disposed in direct or indirect contact with the light guide plate 200. Accordingly, light moving from the lower surface of the light guide plate 200 can be reflected upward from the light guide plate 200 by the reflective member 400.

The diffusion member 500 may be disposed on the light guide plate 200. The diffusion member 500 may be a diffusion sheet. The diffusion member 500 can improve the uniformity of light passing by diffusing light emitted toward the top of the light guide plate 200. The diffusion member 500 may further include diffusion beads to improve diffusion.

The pattern member 600 may be disposed on the diffusion member 500. The pattern member 600 may be a printing sheet. The pattern member 600 may include a printed layer 620 and a base substrate 610 on the printed layer 620.

However, the embodiment is not limited to this, and a diffusion function may be provided on the pattern member 600, so that the diffusion member 500 may be omitted. For example, by adding diffusion beads or the like to the pattern member 600, light passing through the pattern member 600 can be diffused.

Accordingly, since the separate diffusion member 500 can be omitted, the overall thickness can be reduced.

The pattern member 600 may include a pattern portion (PA) and a non-pattern portion (NPA). For example, the printed layer 620 may include the pattern portion (PA) and the non-pattern portion (NPA). The pattern portion (PA) may be formed in the shape of a logo and/or an icon, and the shape of the pattern portion (PA) may be visible from the outside by light emitted from the bottom to the top.

The pattern portion (PA) may transmit light, and the non-pattern portion (NPA) may not transmit light. Additionally, the pattern part (PA) can be implemented using colored ink, and the non-pattern part (NPA) can be implemented using black or white ink that does not transmit light.

The groove 210 of the light guide plate 200 described above may be formed in a region that does not overlap the pattern portion (PA) but overlaps a portion of the non-pattern portion (NPA). Accordingly, the light transmitting part 320 inserted into the groove 210 may be disposed in an area overlapping with the non-patterned part (NPA).

Additionally, the fixing member 700 may be disposed in a region that does not overlap the pattern portion (PA) but overlaps a portion of the non-pattern portion (NPA). Accordingly, the light transmitting unit 320 can be fixed inside the groove 210 by the fixing member 700.

Accordingly, the air gap area between the light guide plate 200 and the light transmitting unit 320 can be minimized to prevent light leakage, and the luminance of the lighting device according to the embodiment can be improved.

Additionally, visibility of the pattern portion PA can be improved when light is emitted from the light emitting member 300. In detail, since the light incident surface of the light guide plate 200 is formed in an area corresponding to the non-patterned portion (NPA), visibility of the patterned portion (PA) can be improved. Additionally, since the fixing member 700 is disposed in a position corresponding to the groove 210, the reliability of the lighting device can be improved.

Although not shown in the drawing, one end of the light transmitting unit 320 may have various shapes. For example, one end of the light transmitting unit 320 may have one of the following shapes: a polyhedron, a cylinder, a cone, a polygonal pyramid, and an aspherical shape including a lens shape.

Additionally, an optical member such as a prism sheet may be further disposed on the diffusion member 500. In detail, an optical member such as a prism sheet may be further disposed between the diffusion member 500 and the pattern member 600.

The prism sheet can improve the luminance of the lighting device by increasing the straightness of passing light.

Hereinafter, a lighting device according to a second embodiment will be described with reference to FIGS. 4 and 5. In the description of the lighting device according to the second embodiment, the description of the same and similar components as the lighting device according to the first embodiment described above will be omitted, and the same reference numerals will be assigned to the same similar components.

Referring to FIGS. 4 and 5, in the lighting device according to the second embodiment, the diameter d1 of the light transmitting unit 320 may be different from the height h1 of the groove 210, and the groove ( It may correspond to the width (W1) of 210). In detail, the diameter d1 of the light transmitting unit 320 may be smaller than the height h1 of the groove 210 and may be equal to the width W1 of the groove 210. Accordingly, the light transmitting unit 320 can be inserted and placed inside the groove 210.

A fixing member 700 may be disposed on the light guide plate 200. The fixing member 700 may be disposed on the upper surface of the light guide plate 200. The fixing member 700 may be disposed on an edge area of the light guide plate 200 on the top surface of the light guide plate 200 . The upper surface of the light guide plate 200 includes an overlap area (OR) including an area where the grooves 210 are formed and an area between the grooves 210, and the fixing member 700 includes the overlap area (OR) ) can be placed on the The fixing member 700 may be disposed in direct contact with the upper surface of the light guide plate 200.

A protrusion 710 may be formed on the fixing member 700. For example, a plurality of protrusions 710 may be formed on one surface of the fixing member 700. In detail, a plurality of protrusions 710 may be formed on one side of the fixing member 700 facing the light guide plate 200.

The protrusions 710 may include a first protrusion 711 and a second protrusion 712. In detail, the protrusions 710 may include a first protrusion 711 disposed on the first light transmitting portion 321 and a second protrusion 712 disposed on the second light transmitting portion 322. there is.

The height h2 of the protrusion 710 may be smaller than the height h1 of the groove 210. Additionally, the width W2 of the protrusion 710 may correspond to the diameter d1 of the light transmitting part 320. That is, the width of the protrusion 720 may correspond to the width W1 of the groove 210. Accordingly, the sum of the height h2 of the protrusion 710 and the diameter d1 of the light transmitting part 320 may correspond to the height h1 of the groove 210.

Additionally, the number of protrusions 710 may correspond to the number of grooves 210. The protrusion 710 may be formed at a position corresponding to the groove 210. For example, the protrusion 710 may be formed at a position that overlaps the groove 210. Accordingly, the protrusion 710 can be inserted and placed inside the groove 210.

The protrusion 710 may be disposed adjacent to the light transmitting unit 320. For example, the protrusion 710 may be disposed to directly or indirectly contact the light transmitting unit 320. In detail, the protrusion 710 may be adhered to the light transmitting unit 320 using an adhesive material.

That is, the groove 210 of the light guide plate 200 and the protrusion 710 of the fixing member 700 do not overlap the pattern portion PA but are disposed in an area that overlaps the non-pattern portion NPA. You can. Accordingly, the light transmitting part 320 inserted into the groove 210 may be disposed in an area that overlaps the non-patterned part (NPA).

Additionally, the fixing member 700 may be disposed in an area that does not overlap the pattern portion (PA) but overlaps the non-pattern portion (NPA). That is, the protrusion 710 may be disposed in an area that overlaps the non-pattern portion (NPA). Accordingly, the light transmitting unit 320 can be fixed inside the groove 210 by the fixing member 700.

Accordingly, the air gap area between the light guide plate 200 and the light transmitting unit 320 can be minimized to prevent light leakage, and the luminance of the lighting device according to the embodiment can be improved.

Additionally, visibility of the pattern portion PA can be improved when light is emitted from the light emitting member 300. In detail, since the light incident surface of the light guide plate 200 is formed in an area corresponding to the non-patterned portion (NPA), visibility of the patterned portion (PA) can be improved. Additionally, since the protrusion 710 is disposed at a position overlapping with the groove 210, the reliability of the lighting device can be improved.

However, the embodiment is not limited to this, and a plurality of light transmitting units 320 may be inserted and disposed in the groove 210. That is, a light transmission group including a plurality of light transmission units 320 may be inserted and placed in the groove 210. When the light transmission group is inserted and disposed in the groove 210, the width of the light transmission group may correspond to the width W1 of the groove 210, the height of the light transmission group, and the protrusion ( The sum of the heights (h2) of 710 may correspond to the height (h1) of the groove 210.

Accordingly, the number of grooves 210 can be reduced, thereby improving process efficiency.

Hereinafter, a lighting device according to a third embodiment will be described with reference to FIGS. 6 and 7. Description of the lighting device according to the third embodiment will be omitted for components that are the same as those of the lighting devices according to the first and second embodiments described above, and the same reference numerals will be given to the same components.

6 and 7, in the lighting device according to the third embodiment, the diameter d1 of the light transmitting part 320 is different from the height h1 of the groove 210, and the groove 210 It can correspond to the width (W1) of . In detail, the diameter d1 of the light transmitting unit 320 may be greater than the height h1 of the groove 210 and may be equal to the width W1 of the groove 210. Accordingly, the light transmitting unit 320 can be inserted and placed inside the groove 210.

A fixing member 700 may be disposed on the light guide plate 200. The fixing member 700 may be disposed on the upper surface of the light guide plate 200. The fixing member 700 may be disposed on an edge area of the light guide plate 200 on the top surface of the light guide plate 200 . The upper surface of the light guide plate 200 includes an overlap area (OR) including an area where the grooves 210 are formed and an area between the grooves 210, and the fixing member 700 includes the overlap area (OR) ) can be placed on. The fixing member 700 may be disposed in direct contact with the upper surface of the light guide plate 200.

A fixing groove 720 may be formed in the fixing member 700. For example, a plurality of fixing grooves 720 may be formed on one surface of the fixing member 700. In detail, a plurality of fixing grooves 720 may be formed on one side of the fixing member 700 facing the light guide plate 200.

The fixing grooves 720 may include a first fixing groove 721 and a second fixing groove 722. In detail, the fixing groove 720 includes a first fixing groove 721 disposed on the first light transmitting unit 321 and a second fixing groove 722 disposed on the second light transmitting unit 322. may include.

The height h2 of the fixing groove 720 may be smaller than the diameter d1 of the light transmitting unit 320. Additionally, the width W2 of the fixing groove 720 may correspond to the diameter d1 of the light transmitting unit 320. That is, the width W2 of the fixing groove 720 may correspond to the width W1 of the groove 210. Accordingly, the diameter d1 of the light transmitting unit 320 may correspond to the sum of the height h1 of the groove 210 and the height h2 of the fixing groove 720.

The shape of the fixing groove 720 may correspond to the shape of the light transmitting unit 320. Additionally, the number of fixing grooves 720 may correspond to the number of grooves 210. The fixing groove 720 may be formed at a position corresponding to the groove 210. For example, the fixing groove 720 may be formed at a position that overlaps the groove 210. Accordingly, the protrusion 710 can be inserted and placed inside the groove 210.

The fixing groove 720 may be disposed adjacent to the light transmitting unit 320. For example, the fixing groove 720 may be placed in direct or indirect contact with the light transmitting unit 320. In detail, the fixing groove 720 may be adhered to the light transmitting unit 320 using an adhesive material.

That is, the groove 210 of the light guide plate 200 and the fixing groove 720 of the fixing member 700 are disposed in an area that does not overlap the pattern portion (PA) but overlaps the non-pattern portion (NPA). It can be. Accordingly, the light transmitting part 320 inserted into the groove 210 may be disposed in an area that overlaps the non-patterned part (NPA).

Additionally, the fixing member 700 may be disposed in an area that does not overlap the pattern portion (PA) but overlaps the non-pattern portion (NPA). That is, the fixing groove 720 may be disposed in an area that overlaps the non-pattern portion (NPA). Accordingly, the light transmitting unit 320 can be fixed inside the groove 210 by the fixing member 700.

Accordingly, the air gap area between the light guide plate 200 and the light transmitting unit 320 can be minimized to prevent light leakage, and the luminance of the lighting device according to the embodiment can be improved.

Additionally, visibility of the pattern portion PA can be improved when light is emitted from the light emitting member 300. In detail, since the light incident surface of the light guide plate 200 is formed in an area corresponding to the non-patterned portion (NPA), visibility of the patterned portion (PA) can be improved. Additionally, since the fixing groove 720 is disposed in a position overlapping with the groove 210, the reliability of the lighting device can be improved.

However, the embodiment is not limited to this, and a plurality of light transmitting units 320 may be inserted and disposed in the groove 210. That is, a light transmission group including a plurality of light transmission units 320 may be inserted and placed in the groove 210. When the light transmission group is inserted and disposed in the groove 210, the width of the light transmission group may correspond to the width W1 of the groove 210, and the height of the light transmission group may correspond to the width W1 of the groove 210. ) may correspond to the sum of the height (h1) and the height of the fixing groove (h2).

Accordingly, the number of grooves 210 can be reduced, thereby improving process efficiency.

The lighting device according to the embodiment may be applied to a vehicle by arranging a cover member, etc.

8 to 11 are diagrams showing an example of a lighting device according to an embodiment being applied to a vehicle.

Referring to FIGS. 8 to 11 , lighting devices according to embodiments may be applied to vehicles.

For example, lighting devices according to embodiments may be located inside a car as shown in FIG. 8, and can be located anywhere where a lighting device can be applied inside or outside the car.

In detail, as the cover member is disposed on the lighting device according to embodiments, when the lighting device is in an off state, the pattern of the lighting device may not be visible from the outside.

The cover member may be a light-transmitting fabric. For example, the cover member may transmit or semi-transmit light.

The transmittance of the cover member may be about 3% to 30%. If the transmittance of the cover member is less than 3%, the brightness of the light source must be increased, so reliability may be reduced due to heat generation, and if the transmittance is more than 30%, the rear part of the fabric is visible. In detail, the transmittance of the cover member may be about 5% to 15%. This is because when the transmittance is less than 5%, visibility is reduced, and when the transmittance is more than 20%, it is difficult to control the brightness of the lighting device.

Additionally, the lighting device according to the embodiment may have a luminance of 200 to 600 nits when the cover member is disposed. Brightness refers to the brightness of the lighting device, and the higher the luminance, the brighter the screen. At this time, if the weather is cloudy, daytime visibility must be at least 200 nits, and if the weather is clear, daytime visibility must be at least 300 nits. Additionally, if the light emitting unit has a luminance exceeding 600 nits, it may obstruct the driver's field of vision, and a problem arises in which the heat generation of the light source becomes excessively high. thus,

In addition, the cover member may include natural fibers such as cotton, hemp, wool, silk, and asbestos, polyvinyl chloride, polyvinyl alcohol fiber, polyamide fiber, polyester fiber, acrylic fiber, nylon, polyethylene terephthalite, It may include all commonly used synthetic fibers such as polyacrylonicryl, polypropylene, polyurethane, polyalkylparaoxybenzoate, and polytetrafluoroethylene.

The lighting device according to embodiments may determine whether to turn on or off depending on whether the device provided in the vehicle is used. For example, the light source may be turned on or off depending on whether the car door is opened or closed, and may be turned on or off depending on whether the car's seat belt is worn.

Referring to FIG. 9, when the car door 271 of the car 270 is opened, the lighting device 1000 may remain on, flash periodically, or turn on from the off state. on) state, and the lighting device may emit light according to an operation preset by the user.

In addition, referring to FIG. 10, when the seat belt 272 of the car 270 is worn, the lighting device 1000 can remain in an off state, and when the seat belt 272 is not worn, the lighting device 1000 can remain in the off state. The light may change to an on state, or the lighting device may emit light according to an operation preset by the user. Therefore, the user can immediately notice when a car door is opened or the car's seat belt is not worn while driving, and quickly take countermeasures, which can be of great help in driving the car safely. A typical instrument panel has a small size of about a few centimeters, so the driver or co-driver cannot easily notice it, but the lighting device according to the embodiment can be implemented regardless of size, so it has the advantage of being easily recognizable by the user.

Additionally, the lighting device according to the embodiment may be placed above or below the garnish. The garnish may be a member arranged so that the interior and exterior of the vehicle have a sense of unity with the vehicle body.

Referring to FIG. 11, the lighting device 1000 according to the embodiment may be disposed between the lower garnish 2100 and the upper garnish 2200.

The lower garnish 2100 and the upper garnish 2200 may include plastic. The lower garnish 2100 and the upper garnish 2200 may be flexible. The lower garnish 2100 and the upper garnish 2200 may include a curved surface.

Additionally, the lighting device according to the embodiment may be placed below the upper garnish without a separate lower garnish.

The upper garnish may be translucent or transparent. When the upper garnish is transparent, the cover member of the embodiment may be disposed on the upper garnish. When the upper garnish is translucent, the cover member may be omitted and the light transmittance of the upper garnish may be 3% to 30%.

Additionally, a touch panel 3000 including touch electrodes that perform a touch function may be disposed on the top or bottom of the lighting device. The touch panel 3000 may be placed in a position corresponding to the lighting device 1000.

For example, the touch panel may be placed directly on top or below the lighting device, or may be placed below the upper garnish 2200.

Accordingly, various operations, such as the on/off function of the lighting device, can be performed depending on the touch operation inside the vehicle.

The features, structures, effects, etc. described in the above-described embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the description has been made focusing on the embodiments above, this is only an example and does not limit the present invention, and those skilled in the art will understand the above examples without departing from the essential characteristics of the present embodiments. You will be able to see that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (17)

light guide plate; and
Comprising a light emitting member disposed on one side of the light guide plate,
The light emitting member includes a light source and a plurality of light transmitting units connected to the light source,
A plurality of grooves concave with respect to the one side are formed on one side of the light guide plate,
The light transmitting units include one end and the other end connected to the light source,
At least a portion of one end of the light transmitting units is disposed inside the groove,
The height of the groove corresponds to the diameter of the light transmitting unit,
The upper surface of the light guide plate includes an overlapping area including an area where the grooves are formed and an area between the grooves,
A lighting device further comprising a fixing member disposed on the overlapping area. According to claim 1,
The lighting device wherein the area of the overlapping area is 0.1% to 8% of the total area of the upper surface of the light guide plate. According to claim 1,
A lighting device wherein the spacing between the grooves is 0.05mm to 50mm. delete light guide plate; and
Comprising a light emitting member disposed on one side of the light guide plate,
The light emitting member includes a light source and a plurality of light transmitting units connected to the light source,
A plurality of grooves concave with respect to the one side are formed on one side of the light guide plate,
The light transmitting units include one end and the other end connected to the light source,
At least a portion of one end of the light transmitting units is disposed inside the groove,
The upper surface of the light guide plate includes an overlapping area including an area where the grooves are formed and an area between the grooves,
Further comprising a fixing member disposed on the overlapping area,
The fixing member includes one surface facing the light guide plate,
A fixing groove corresponding to the shape of the light transmitting unit is formed on one surface of the fixing member,
A lighting device wherein the fixing groove is disposed in an area overlapping with the groove. light guide plate; and
Comprising a light emitting member disposed on one side of the light guide plate,
The light emitting member includes a light source and a plurality of light transmitting units connected to the light source,
A plurality of grooves concave with respect to the one side are formed on one side of the light guide plate,
The light transmitting units include one end and the other end connected to the light source,
At least a portion of one end of the light transmitting units is disposed inside the groove,
The upper surface of the light guide plate includes an overlapping area including an area where the grooves are formed and an area between the grooves,
Further comprising a fixing member disposed on the overlapping area,
The fixing member includes one surface facing the light guide plate,
A protrusion is disposed on one surface of the fixing member,
A lighting device wherein the protrusion is disposed in an area that overlaps the groove.
According to claim 5,
A lighting device wherein the area of the overlapping area is 0.1% to 8% of the total area of the upper surface of the light guide plate. According to claim 5,
A lighting device wherein the spacing between the grooves is 0.05mm to 50mm. According to claim 6,
A lighting device wherein the area of the overlapping area is 0.1% to 8% of the total area of the upper surface of the light guide plate. According to claim 6,
A lighting device wherein the spacing between the grooves is 0.05mm to 50mm.
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