KR101326519B1 - Lighting device - Google Patents

Abstract

An embodiment relates to a lighting device.
In one embodiment, a lighting apparatus includes: a light guide part having an incident part to which light is incident and a radiating part to which light is emitted; A light emitting part disposed on an incident part of the light guide part; A cap part having a recess in which the light emitting part and the incident part of the light guide part are disposed; And a plurality of diffusion patterns disposed on the radiating portion of the light guide portion, wherein the light guide portion is positioned between a first side surface and a second side surface facing the first side surface, and between the first side surface and the second side surface. A cylindrical shape elongated in the longitudinal direction, the incidence portion of the light guide portion includes the first side surface and the second side surface, the radiation portion of the light guide portion includes the outer peripheral surface, and the plurality of diffusion patterns And at least three first, second, and third columns, wherein the spacing between the first column and the second column is different from the spacing between the second column and the third column.

Description

LIGHTING DEVICE

An embodiment relates to a lighting device.

Light Emitting Diode (LED) refers to a light emitting diode, and LED is a device using a phenomenon in which light is generated when a current flows through a PN junction in a compound semiconductor such as GaP or GaAs. By adjusting, it is possible to manufacture a light emitting diode that generates light of a constant wavelength. LED power consumption is 20% of the conventional incandescent lamp, so it is used in various fields as a high efficiency lighting device. Especially, it is advantageous in that the brightness is brighter and the power efficiency is better than the power consumption.

Fluorescent lamps, which are widely used as indoor lighting fixtures, have a limited lifespan. After a certain period of time, carbonization occurs and the illuminance decreases. After that, the fluorescent lamps run out rapidly, and the fluorescent lamps must be changed periodically. In addition to the high cost, there is a problem that the power consumption is high, it is required to switch to a high-efficiency LED luminaire.

The embodiment provides a lighting device that can replace a conventional fluorescent lamp.

In addition, the embodiment provides a lighting device capable of emitting light in all directions.

In addition, the embodiment provides a lighting device having a different amount of light emitted according to the direction.

The lighting apparatus according to the embodiment, the lighting apparatus according to the embodiment, the light guide portion having an incident portion to which light is incident and the radiating portion is emitted; A light emitting part disposed on an incident part of the light guide part; A cap part having a recess in which the light emitting part and the incident part of the light guide part are disposed; And a plurality of diffusion patterns disposed on the radiating portion of the light guide portion, wherein the light guide portion is positioned between a first side surface and a second side surface facing the first side surface, and between the first side surface and the second side surface. A cylindrical shape elongated in the longitudinal direction, the incidence portion of the light guide portion includes the first side surface and the second side surface, the radiation portion of the light guide portion includes the outer peripheral surface, and the plurality of diffusion patterns And at least three first, second, and third columns, wherein the spacing between the first column and the second column is different from the spacing between the second column and the third column.

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Illumination apparatus according to the embodiment, the light guide having a long cylindrical shape in the longitudinal direction; A first cap part coupled to one side of the light guide part; A second cap portion coupled to the other side of the light guide portion; A first light emitting part accommodated in the first cap part and emitting light toward one side of the light guide part; And a second light emitting part accommodated in the second cap part and emitting light to the other side of the light guide part, wherein the light guide part is disposed between one side of the light guide part and the other side of the light guide part and the one side surface. And a radiating part for emitting light incident to the other side to the outside, wherein the light guiding part includes a plurality of diffusion patterns for diffusing light emitted from the light guiding part, wherein the plurality of diffusion patterns are in the longitudinal direction The interval between the diffusion patterns arranged in at least one row, the narrower toward both the central portion of the light guide portion from both sides of the light guide portion.

Using the lighting apparatus according to the embodiment, there is an advantage that can replace the conventional fluorescent lamp.

In addition, there is an advantage that can emit light in all directions.

In addition, there is an advantage that the amount of light emitted according to the direction can implement a different fluorescent lamp.

1 is a front view of a lighting device according to an embodiment,
2 is a perspective view and a partially enlarged view of the lighting apparatus shown in FIG. 1,
3 is an exploded perspective view of the lighting apparatus shown in FIG.
4 is a perspective view illustrating a modification of the diffusion pattern illustrated in FIG. 2;
FIG. 5 is a perspective view illustrating a modified example of an arrangement structure of a plurality of diffusion patterns illustrated in FIG. 3;
6 is a cross-sectional view of the first cap portion shown in FIG.
7 is a cross-sectional view to which an alternative example of the optical unit shown in FIG. 6 is applied;
8 is a graph showing a light distribution distribution of the lighting apparatus shown in FIGS. 1 to 3;
FIG. 9 is a diagram showing an illuminance distribution and a luminance distribution of the lighting apparatus illustrated in FIGS. 1 to 3;

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. In addition, the size of each component does not necessarily reflect the actual size.

In the description of embodiments according to the present invention, it is to be understood that where an element is described as being formed "on or under" another element, On or under includes both the two elements being directly in direct contact with each other or one or more other elements being indirectly formed between the two elements. Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

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

1 is a front view of a lighting apparatus according to an embodiment, FIG. 2 is a perspective view and a partially enlarged view of the lighting apparatus illustrated in FIG. 1, and FIG. 3 is an exploded perspective view of the lighting apparatus illustrated in FIG. 2.

1 to 3 is a lighting device that can replace the conventional fluorescent lamps. Therefore, the size of the lighting apparatus according to the embodiment is the same as the size of a conventional fluorescent lamp.

1 to 3, the lighting apparatus according to the embodiment may include a light guide part 100, cap parts 300a and 300b, a light emitting part 500a, and an optical part 700a.

The light guide part 100 may have a cylindrical shape, and more specifically, the light guide part 100 may have a long cylindrical shape in one direction. The light guide part 100 may have a hollow cylindrical shape made of a single material. In the present specification, the cylindrical shape includes not only a circle but also an ellipse in cross section. Moreover, the cylinder which has the cross section of a circle and the cross section of an ellipse is also included. Hereinafter, for convenience of description, the light guide unit 100 will be described as a cylinder.

The light guide unit 100 may have a size that is the same as or similar to that of a conventional fluorescent lamp.

The light guide part 100 guides the light incident from the light emitting part 500a. The light guide part 100 guides the light incident to one side to the other side.

The material of the light guide part 100 is acrylic resin-based, such as polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), cycloolefin copolymer (COC), and polyethylene naphthalate (PEN) in consideration of thermal expansion according to use temperature. ) May be any one of resins.

The light guide portion 100 has an incident portion and a radiating portion. The incident part is a part to which light is incident and includes one side part and the other side part. One side and the other side are arranged to correspond or face each other. The radiating part emits light and is disposed between one side and the other side. The incident part is not exposed to the outside, and the radiating part is exposed to the outside.

One side portion is coupled to the first cap portion 300a, and the other side portion is coupled to the second cap portion 300b. In addition, the first light emitting part 500a is disposed on one side, and the second light emitting part (not shown) is disposed on the other side. In addition, a first optical unit 700a is disposed between one side and the first light emitting unit 500a, and a second optical unit (not shown) is disposed between the other side and the second light emitting unit (not shown).

A plurality of diffusion patterns 150 may be disposed in the light guide portion 100.

The diffusion pattern 150 is disposed on the surface of the light emitting unit 100 to diffuse light emitted from the surface of the light emitting unit.

The diffusion pattern 150 may be printed in a circular shape on the surface of the radiating part of the light guide plate 100. The diffusion pattern 150 is not limited to the printed pattern. This will be described with reference to FIG. 4.

4 is a perspective view illustrating a modified example of the diffusion pattern 150 illustrated in FIG. 2.

Referring to FIG. 4, the diffusion pattern 150 ′ illustrated in FIG. 4 may be a groove 150 ′ that is recessed to a predetermined depth on the surface of the light emitting plate 100. The groove 150 'may have a hemispherical shape, but is not limited thereto and may be replaced with various shapes.

Again, referring to FIGS. 1 to 3, the shape of the diffusion pattern 150 is not limited to a circular shape. The diffusion pattern 150 may have various shapes such as an ellipse and a polygon as well as a circle.

The plurality of diffusion patterns 150 are disposed in the radiating portion of the light guide portion 100.

The plurality of diffusion patterns 150 may be arranged on the surface of the radiating part of the light guide part 100 in a plurality of rows. Here, the spacing between the plurality of columns may be the same as shown in FIG. 2. If the intervals between the plurality of columns are the same, the amount of light radiated in all directions from the radiating portion of the light guide portion 100 is constant in any direction. Here, the spacing between the plurality of columns may be different from each other. This will be described with reference to FIG. 5.

5 is a perspective view illustrating a modified example of an arrangement structure of the plurality of diffusion patterns 150 illustrated in FIG. 3.

Referring to FIG. 5, the plurality of diffusion patterns 150 are arranged in a plurality of rows (such as one row, two rows, and three rows) on the surface of the radiating part of the light guide part 100. Here, the interval between the first row and the second row may be different from the interval between the second row and the third row. If the spacing between the plurality of columns is different, the amount of light emitted from the radiating portion of the light guide portion 100 may vary depending on the direction. That is, in the radiating part of the light guide part 100, a lot of light is emitted in a part where the spacing between the columns is narrow, and a lot of light is emitted, and in the part where the spacing is small, that is, the spacing between the columns is narrow, the spacing between the columns is narrow. Less light is emitted than parts.

Referring back to FIG. 2, the spacing between the plurality of diffusion patterns 150 disposed on one column may be different from each other. In detail, an interval between the diffusion patterns 150 disposed at the center of the light guide part 100 is smaller than an interval between the diffusion patterns 150 disposed at both sides of the light guide part 100. That is, the distance between the diffusion patterns 150 becomes narrower from one side of the light guide portion 100 toward the center of the light guide portion 100. This is to allow light incident on both sides of the light guide part 100 to reach the center of the light guide part 100.

The cap parts 300a and 300b are coupled to both sides of the light guide part 100. In detail, the first cap part 300a is coupled to one side of the light guide part 100, and the second cap part 300b is coupled to the other side part of the light guide part 100. Since the shape of the second cap part 300b is the same as that of the first cap part 300a, the following description will be given with reference to the first cap part 300a.

The first cap part 300a radiates heat transmitted from the light emitting part 500a. To this end, the first cap portion 300a may be a metal or resin material having a good thermal conductivity. For example, it may be aluminum or an aluminum alloy.

The first cap part 300a may have two or more heat dissipation fins 350a to widen the heat dissipation area.

The first cap part 300a has an electrode pin 390a. The electrode pin 390a may be the same as the pin used in a conventional fluorescent lamp. The electrode pin 390a is electrically connected to the light emitting part 500a to provide power.

The first cap portion 300a has a recess 310a. The recess 310a accommodates the light emitting part 500a, the optical part 700a, and one side of the light guide part 100. Specifically, it will be described with reference to FIG.

FIG. 6 is a cross-sectional view of the first cap part 300a illustrated in FIG. 3.

3 and 6, the light emitting part 500a is disposed on the bottom surface of the recess 310a. The recess 310a accommodates the optical part 700a and one side of the light guide part 100.

The light emitting part 500a is disposed at the center of the bottom surface of the recess 310a. Although only one light emitting unit 500a is illustrated in the drawing, the present invention is not limited thereto and two or more light emitting units 500a may be provided.

The light emitting unit 500a may include a substrate 510a, a light emitting device 530a, and a resin unit 550a.

The substrate 510a is disposed on the bottom surface of the recess 310a, and in particular, may be disposed at the center of the bottom surface. The substrate 510a may be a printed circuit board (PCB) printed with a circuit pattern on an insulator, and may be any one of a metal core PCB, a flexible PCB, and a ceramic PCB. .

The surface of the substrate 510a may be a material that efficiently reflects light, or may be coated with a color that efficiently reflects light, for example, white, silver, or the like.

At least one light emitting device 530a is disposed on the substrate 510a. The light emitting device 530a may be a light emitting diode chip emitting red, green, or blue light, or a light emitting diode chip emitting ultraviolet light. The LED chip may be any one of a horizontal type, a vertical type, and a flip type.

The resin portion 550a is disposed on the light emitting element 530a. In detail, the resin part 550a may be disposed on the substrate 510a to cover the light emitting device 530a.

The resin part 550a may adjust the directing angle of the light emitted from the light emitting element 530a or the direction of the light. The resin portion 550a may be a hemisphere type and may be a light transmissive resin such as a silicone resin or an epoxy resin without a void space. The light transmitting resin may include a phosphor dispersed wholly or partially.

When the light emitting device 530a is a blue light emitting diode, phosphors included in the translucent resin may include garnet (YAG, TAG), silicate, nitride, and oxynitride. It may include at least one or more of the system. Natural light (white light) can be realized by including only a yellow phosphor in the translucent resin. However, a green phosphor or a red phosphor may be further included to improve the color rendering index and reduce the color temperature. When various kinds of phosphors are mixed in the light-transmissive resin, the addition ratio according to the color of the phosphor may use more green phosphors than red phosphors and more yellow phosphors than green phosphors. YAG, silicate, and oxynitride systems of the garnet system may be used as the yellow phosphor, silicate system and oxynitride system may be used as the green system phosphor, and nitrides may be used as the red system phosphor. have. A layer having a red-based phosphor, a layer having a green-based phosphor, and a layer having a yellow-based phosphor may be separately formed in addition to a mixture of various kinds of phosphors in the translucent resin.

The light emitting part 500a may further include a heat dissipation pad (not shown) disposed between the substrate 510a and the bottom surface of the recess 310a of the first cap part 300a. The heat dissipation pad may transfer heat emitted from the light emitting part 500a to the first cap part 300a quickly.

The optical part 700a is disposed in the recess 310a of the first cap part 300a and is disposed on the light emitting part 500a. The optical part 700a is optically coupled to the light emitting part 500a.

The optical part 700a may be a reflector reflecting light emitted from the light emitting part 500a. The reflector 700a has a funnel shape and has a reflective surface surrounding the light emitting part 500a. The reflective surface may be curved or flat. The reflective surface reflects the light incident from the light emitting part 500a to one side of the light guide part 100. The amount of light incident on the light guide portion 100 is increased by the reflector 700a.

The optical part 700a is not limited to the reflector. The optical unit 700a may be a lens that is not a reflector. This will be described with reference to FIG. 7.

FIG. 7 is a cross-sectional view to which an alternative example of the optical unit 700a shown in FIG. 6 is applied.

3 and 7, the optical unit 700a ′ may be a lens. The lens 700a 'is accommodated in the recess 310a of the first cap portion 300a and disposed on the light emitting portion 500a. The lens 700a 'may convert light emitted from the light emitter 500a into condensed or parallel light.

The lens 700a 'may have a phosphor. The phosphor may be any one of yellow, green and red phosphors. By having the phosphor, the color rendering index of the light emitted from the lens 700a 'can be improved.

FIG. 8 is a graph illustrating light distribution of the lighting apparatus illustrated in FIGS. 1 to 3, and FIG. 9 is a diagram illustrating an illuminance distribution and a luminance distribution of the lighting apparatus illustrated in FIGS. 1 to 3. .

8 is a light distribution distribution when the intervals between the plurality of columns of the diffusion patterns 150 of the lighting apparatus illustrated in FIGS. 1 to 3 are the same. Here, if the plurality of columns are as shown in FIG. 5, the light distribution will be different. That is, a large amount of light will be emitted in a portion where the spacing between the plurality of columns is narrow, and a small amount of light will be emitted in the portion where the spacing is wide. Therefore, fluorescent lights having different amounts of light emitted according to directions may be implemented.

Although the above description has been made with reference to the embodiments, these are only examples and are not intended to limit the present invention, and those of ordinary skill in the art to which the present invention pertains should not be exemplified above without departing from the essential characteristics of the present embodiments. It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: light guide part
300a, 300b: first and second cap portions
500a: light emitting unit
700a: optics

Claims (15)

A light guide portion having an incident portion at which light is incident and a radiating portion at which light is emitted;
A light emitting part disposed on an incident part of the light guide part;
A cap part having a recess in which the light emitting part and the incident part of the light guide part are disposed; And
Includes; a plurality of diffusion patterns disposed on the radiating portion of the light guide portion,
The light guide portion has a first side and a second side facing the first side, an outer circumferential surface positioned between the first side and the second side, and has a cylindrical shape that is long in the longitudinal direction,
The incident portion of the light guide portion includes the first side surface and the second side surface,
The radiation portion of the light guide portion includes the outer circumferential surface,
The plurality of diffusion patterns are arranged in at least three first, second and third columns,
The spacing between the first row and the second row is different from the spacing between the second row and the third row. delete The method of claim 1,
And said first row, said second row and said third row are arranged in a direction perpendicular to said longitudinal direction along an outer circumferential surface of said light guide portion. The method of claim 1,
Further comprising an optical portion disposed in the recess of the cap portion,
And the optical unit is disposed between the light emitting unit and the light guide unit. 5. The method of claim 4,
And the optical part is a reflector reflecting light emitted from the light emitting part to an incident part of the light guide part. 5. The method of claim 4,
The optical unit is a lens. A light guide portion having a long cylindrical shape in a longitudinal direction;
A first cap part coupled to one side of the light guide part;
A second cap portion coupled to the other side of the light guide portion;
A first light emitting part accommodated in the first cap part and emitting light toward one side of the light guide part; And
And a second light emitting part accommodated in the second cap part and emitting light to the other side of the light guide part.
The light guide part includes a radiation part disposed between one side of the light guide part and the other side of the light guide part to emit light incident to the one side and the other side to the outside,
The light guide part includes a plurality of diffusion patterns that diffuse light emitted from the light guide part,
The plurality of diffusion patterns are arranged at least in a line in the longitudinal direction,
An interval between the plurality of diffusion patterns arranged in a line is narrowed toward both the central portion of the light guide portion from both sides of the light guide portion. The method of claim 7, wherein
And an optical unit disposed between the first light emitting unit and one side of the light guide unit. The method of claim 8,
The optical unit is a lighting device that reflects the light emitted from the first light emitting portion to one side of the light guide portion. The method of claim 8,
The optical unit is a lens. delete delete 8. The method of claim 1 or 7,
And the cap part has a protruding electrode pin electrically connected to an external power source. 8. The method of claim 1 or 7,
The cross section which cut | disconnected the said light guide part to the direction perpendicular | vertical to the said longitudinal direction is circular shape, The lighting apparatus. 8. The method of claim 1 or 7,
The light guide unit is any one of polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), poly carbonate (PC), cycloolefin copolymer (COC), and polyethylene naphthalate (PEN).

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