KR20180127114A - Lighting Apparatus - Google Patents

Abstract

The present invention relates to a lighting apparatus with improved overall luminance of the lighting apparatus and visibility of a pattern of a pattern member. The lighting apparatus according to an embodiment of the present invention comprises: a light guide plate; a light emitting member disposed on one side of the light guide plate; and a pattern member disposed on the light guide plate and including a pattern part and a non-pattern part. The pattern member comprises: a base member; and a first printing layer disposed on the base member and disposed on an area corresponding to the non-pattern part, wherein the base member is white. Also, the lighting apparatus according to an embodiment of the present invention comprises: a reflective member; a light emitting member disposed on the reflective member; and a pattern member disposed on the light emitting member and including a pattern part and a non-pattern part. The pattern member comprises: a base member; and a first printing layer disposed on the base member and disposed on an area corresponding to the non-pattern part, wherein the base member is white.

Description

Lighting Apparatus

An embodiment relates to a lighting device.

Lighting devices are devices that can supply light or control the amount of light and are used in various fields. For example, it can be applied inside or outside the building to illuminate the outside. In addition, the lighting device can be applied to household appliances, vehicles, and the like to visually provide various kinds of information.

The illumination device may include a pattern film having a shape such as a logo and / or an icon, and the light emitted from the light source may pass through the pattern film to visually recognize the shape by the light.

A conventional pattern film was produced by printing a print layer on a transparent film. Wherein the print layer includes a first print layer through which light is transmitted and a second print layer through which light is not transmitted, wherein the first print layer is a layer printed on a position corresponding to a shape of the logo and / have. Here, the second printing layer is a layer formed to view the shape, and the first printing layer is printed to prevent hot spot phenomenon in which light passing through the pattern film is concentrated in a specific region Layer.

In detail, in the conventional pattern film, the second print layer, on which light is not transmitted, is first printed on the transparent film, and then the first print is printed in the region where the second print layer is not printed, Layer.

However, when the colors of the inks used for printing the first print layer and the second print layer are different from each other and a part of the ink is used for printing the second print layer and the first print layer, So that the brightness of the entire lighting apparatus is lowered.

In addition, in the process of printing the first print layer, the first print layer is not uniformly printed in an area where the second print layer is not printed, so that a light leakage phenomenon occurs in which light leaks into an unprinted area, The light passing through the pattern film is not uniformly diffused to cause a hot spot phenomenon in which light is concentrated in a specific region.

Further, there is a problem that the shape of the pattern film is visually recognized by the light incident from the outside to the illuminator in a state that the illuminator is turned off.

That is, due to the above-mentioned problems, the shape of the pattern film can not be accurately viewed and accurate information can not be provided, the overall luminance of the illumination device is lowered, the pattern is visually recognized when the illumination device is off, There is a problem that the aesthetics deteriorate.

Therefore, a new illumination device capable of solving the above problems is required.

It is an object of the present invention to provide a lighting apparatus in which the overall brightness of a lighting device and the visibility of a pattern of a pattern member are improved by omitting a first printing layer disposed in an area where the second printing layer is not disposed.

In addition, the embodiment is intended to provide a lighting apparatus which can improve the process efficiency by omitting the first printing layer.

In addition, embodiments of the present invention provide a lighting apparatus capable of preventing light leakage and hot spot phenomenon by omitting the first printing layer.

In addition, the embodiment is intended to provide a lighting apparatus in which a pattern of the pattern member is not visually recognized when the power of the illumination apparatus is turned off by arranging a semi-transparent member.

The illumination device according to an embodiment includes a light guide plate, a light emitting member disposed on one side of the light guide plate, and a pattern member disposed on the light guide plate, the pattern member including a pattern portion and a non-pattern portion, And a first printing layer disposed on the base member and disposed on a region corresponding to the non-pattern portion, wherein the base member is white.

Further, the illumination device according to the embodiment includes a reflective member, a light emitting member disposed on the reflective member, and a pattern member disposed on the light emitting member, the pattern member including a pattern portion and a non-pattern portion, And a first printing layer disposed on the base member and on a region corresponding to the non-pattern portion, wherein the base member is white.

The pattern member of the illumination device according to the embodiment may include a base member and a printing layer disposed on the base member. In detail, the base member is opaque and light can be transmitted, and the printing layer may not transmit light. That is, the pattern member according to the embodiment can omit the conventional first print layer, and the base member can replace the first print layer. Accordingly, the thickness of the pattern member can be reduced, and the thickness of the entire illumination device can be reduced, so that it can have a slim structure.

In addition, the illumination device according to the embodiment can omit the first print layer, thereby preventing a step from being formed between the first print layer and the second print layer, thereby improving the overall luminance of the illumination device have.

In addition, the illumination device according to the embodiment can omit the first print layer, thereby preventing light leakage and hot spot, which are caused by the uneven printing of the first print layer, from occurring .

Further, the illumination device according to the embodiment may include a semi-transparent member. Accordingly, the pattern of the pattern member can be prevented from being visually recognized by the light incident from the outside in the off state of the illumination apparatus, thereby improving the appearance of the illumination apparatus.

1 is an exploded perspective view showing a lighting apparatus according to a first embodiment.
2 is a plan view of the pattern member according to the first embodiment.
3 is a cross-sectional view of a pattern member according to the first embodiment.
4 is an exploded perspective view showing a lighting apparatus according to the second embodiment.
5 is an exploded perspective view showing a lighting apparatus according to a third embodiment.
6 to 8 are views for explaining an example in which the lighting apparatus according to the embodiments is applied to a household appliance.

In the description of the embodiments, it is to be understood that each layer (film), area, pattern or structure may be referred to as being "on" or "under / under" Quot; includes all that is formed directly or through another layer. The criteria for top / bottom or bottom / bottom of each layer are described with reference to the drawings.

Also, when a part is referred to as being "connected" to another part, it includes not only a case of being "directly connected" but also a case of being "indirectly connected" with another member in between. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

A lighting apparatus according to an embodiment will be described below with reference to the drawings.

1 and 2, a lighting apparatus 1000 according to a first embodiment includes a cover case 100, a light guide plate 200, a light emitting member 300, a reflective member 400, a pattern member 500, And may include a semi-permeable member 600.

The cover case 100 may have an open top shape. The cover case 100 may receive the light guide plate 200, the light emitting member 300, the reflective member 400, the pattern member 500, and the like.

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

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

The light emitting member 300 may generate light. The light emitting member 300 may transmit light toward the light guide plate 200. The light emitting member 300 may be disposed adjacent to the light guide plate 200. For example, the light emitting member 300 may be disposed on one side of the light guide plate 200. The light emitting member 300 may allow light to enter the light guide plate 200 through one side of the light guide plate 200.

The light emitting member 300 may include light emitting diodes. The light emitting diodes may be disposed on one side of the light guide plate 200. The light emitting diodes generate light, and light can be incident on the light guide plate 200 through the side surface of the light guide plate 200.

The light emitting diodes may include a blue light emitting diode for generating blue light and / or a UV light emitting diode for generating ultraviolet light. That is, the light emitting diodes can emit blue light having a wavelength range of about 430 nm to about 470 nm or ultraviolet light having a wavelength band of about 300 nm to about 400 nm.

The light emitting diodes may be mounted on the printed circuit board 350. The light emitting diodes may be disposed below the printed circuit board 350. The light emitting diodes may be driven by receiving a driving signal through the printed circuit board 350.

The printed circuit board 350 may be electrically connected to the light emitting diodes. The printed circuit board 350 may mount the light emitting diodes. The printed circuit board 350 may be disposed inside the cover case 100.

The reflective member 400 may be disposed adjacent to the light guide plate 200. The reflective member 400 may be disposed under the light guide plate 200. 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 traveling from the lower surface of the light guide plate 200 can be reflected upward of the light guide plate 200.

The reflective member 400 may include a thermoplastic resin. For example, the reflective member 400 may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), polypropylene (PP), and polyimide ), And the like. Among these, polyethylene terephthalate (PET) is excellent in workability, surface roughness, light transmittance, and reflectance compared to other thermoplastic resins, and can satisfy the characteristics required for the reflective member 400 as a whole. However, the embodiment is not limited to this, and may be formed of a material capable of satisfying the characteristics required for the reflective member 400.

Although not shown in the drawing, a diffusion member may be disposed on the light guide plate 200. The diffusion member may be a diffusion sheet. The thickness of the diffusion member may be from about 100 [mu] m to about 300 [mu] m. The diffusion member can diffuse the light emitted from the light emitting member 300 and improve the uniformity of light passing through the diffusion member. The diffusion member may further include a diffusion bead or the like for improving the light diffusibility.

The pattern member 500 may be disposed on the reflective member 400. In detail, the pattern member 500 may be disposed on the light guide plate 200. More specifically, the pattern member 500 may be disposed on the diffusion member. The pattern member 500 may be in direct or indirect contact with the diffusion member.

Alternatively, the diffusion member may be omitted. In detail, a diffusion function may be provided on the pattern member 500 to omit the diffusion member. For example, a diffusion bead or the like may be added to the pattern member 500 to diffuse light passing through the pattern member 500. Accordingly, the overall luminance of the illumination device 1000 according to the embodiment can be improved, and the thickness can be reduced.

When the diffusing member is omitted, the pattern member 500 may be disposed on the light guide plate 200 as described above. In this case, the pattern member 500 may directly or indirectly contact the light guide plate 200. For example, the light guide plate 200 and the pattern member 500 may be adhered to each other through a transparent adhesive layer or the like capable of transmitting light.

The pattern member 500 may include a pattern portion PA and a non-pattern portion NPA. The pattern unit PA may be formed in a shape such as a logo and / or an icon, and the shape of the pattern unit PA can be visually recognized from the outside by the light emitted from the lower part to the upper part.

The pattern portion PA may transmit light, and the non-pattern portion NPA may not transmit light. For example, the pattern portion PA may be implemented using a colored ink that can transmit light, and the non-pattern portion NPA may be formed of a colored ink that does not transmit light, for example, . ≪ / RTI >

The transflective member 600 may be disposed adjacent to the pattern member 500. The transflective member 600 may be disposed on the pattern member 500. The transflective member 600 may be in direct or indirect contact with the pattern member 500.

The transflective member 600 may include a first transflective layer 610 and a second transflective layer 620.

The first transflective layer 610 may be disposed on the pattern member 500. The first semi-transparent layer 610 may directly or indirectly contact the pattern member 500. The second transflective layer 620 may be disposed on the first transflective layer 610. The second semi-transmissive layer 620 may be in direct or indirect contact with the first semi-transmissive layer 610.

The second transflective layer 620 may comprise a substrate and an oxide layer. The substrate may be disposed on the first transflective layer 610. The oxide layer may be disposed between the substrate and the first transflective layer 610. At this time, the oxide layer may directly contact the substrate. For example, the oxide layer may be formed on the substrate by physical vapor deposition or chemical vapor deposition.

The first transflective layer 610 may include a thermoplastic resin. For example, the first semi-transmissive layer 610 and the second semi-transmissive layer 620 may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), poly And thermoplastic resins such as polypropylene (PP) and polyimide (PI).

The base material of the second transflective layer 620 may be transparent. The substrate may comprise glass or a thermoplastic resin. For example, the substrate may be formed of glass, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), polypropylene (PP), and polyimide And may include any one of them. In addition, the oxide layer may include at least one of TiO ₂ , SiO ₂ , Al ₂ O _3, and a non-metal oxide. That is, the second semi-transmissive layer 620 may be formed by depositing at least one of TiO ₂ , SiO ₂ , Al ₂ O _3, and a non-metal oxide on the transparent PET film.

The transmittance of the first transflective layer 610 and the second transflective layer 620 may be different from each other. In detail, the light transmittance of the first semi-transparent layer 610 may be about 5% to about 10%. Also, the light transmittance of the second transflective layer 620 may be about 40% to about 50%.

The first transflective layer 610 and the second transflective layer 620 may be colored. For example, the first transflective layer 610 may comprise black. In detail, the first semi-transparent layer 610 may be black polyethylene terephthalate (PET). In addition, since the second transflective layer 620 includes the oxide described above, it may have the color of the oxide. In addition, the second semi-transmissive layer 620 may further include a color ink to realize various colors.

The thicknesses of the first semi-transparent layer 610 and the second semi-transparent layer 620 may be different from each other. In detail, the thickness of the first transflective layer 610 may be about 50 탆 to about 70 탆. More specifically, the thickness of the first transflective layer 610 may be between about 55 microns and about 65 microns. Preferably, the thickness of the first transflective layer 610 may be about 60 [mu] m.

Also, the thickness of the second transflective layer 620 may be between about 90 μm and about 110 μm. In detail, the thickness of the second transflective layer 620 may be about 95 [mu] m to about 105 [mu] m. Preferably, the thickness of the second transflective layer 620 may be about 100 [mu] m.

That is, the transflective member 600 may be a semi-transmissive member capable of reflecting and / or absorbing a part of incident light and transmitting the remainder. In detail, the transflective member 600 reflects and / or absorbs a part of light emitted toward the upper side of the transflective member 600 by the second transflective layer 620 including oxide, . A portion of the light emitted upward in the pattern member 500 may be reflected by the transflective member 600 in the lower direction of the pattern member 500 and the remaining portion may be reflected by the transflective member 600 So that the pattern of the pattern member 500 can be visually recognized.

Therefore, the illumination device 1000 according to the embodiments is configured such that when the semitransparent member 600 is disposed on the pattern member 500, when the illumination device 1000 is off, The pattern of the pattern member 500 may not be recognized. In addition, the second semitransparent layer 620 may be formed in various colors. For example, when the lighting apparatus 1000 is applied to the outside of the household appliances, the color of the transflective member 600 is implemented in the same manner as the outer case of the household appliances, It may not be recognized when it is in a state. Accordingly, the household appliance can have an improved appearance because the lighting device is not visually recognized.

The pattern member 500 will be described in more detail with reference to FIG. 3 is a cross-sectional view of the pattern member 500 according to the first embodiment.

Referring to FIG. 3, the pattern member 500 may include a base member 510 and a print layer 520 on the base member 510.

The pattern member 500 will be described in more detail with reference to FIG. 3 is a cross-sectional view of the pattern member 500 according to the first embodiment.

Referring to FIG. 3, the pattern member 500 may include a base member 510 and a print layer 520 on the base member 510.

The base member 510 may be formed of a thermally conductive material such as polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), polypropylene (PP), and polyimide And a plastic resin. Among them, polyethylene terephthalate (PET) is excellent in workability, printability, surface roughness, and light transmittance as compared with other thermoplastic resins, so that the characteristics required for the base member 510 can be generally satisfied. However, the embodiment is not limited thereto, and may be formed of a material that can satisfy the characteristics required for the base member 510.

The base member 510 can transmit light. For example, the base member 510 may be colored. In detail, the base member 510 may be white. More specifically, the base member 510 may be entirely white. That is, when the base member 510 is formed of polyethylene terephthalate (PET), the base member 510 may be white polyethylene terephthalate (PET).

Alternatively, at least one surface of the base member 510 on which the printing layer 520 is disposed and the other surface opposite to the one surface may be coated with white.

The printing layer 520 may be formed on the base member 510. In detail, the print layer 520 may be disposed between the base member 510 and the light guide plate 200. The printing layer 520 may include ink. In detail, the printing layer 520 may include an ink composition. The printing layer 520 may not transmit light. The printing layer 520 may be implemented using a colored ink. For example, the printing layer 520 may be implemented using black ink that is not light-transmissive.

As the print layer 520 is formed on the base member 510, the embossed portion and the depressed portion may be formed on one surface of the pattern member 500. For example, the embossed portion may be a region where the printing layer is formed, and the engraved portion may be an area where the printing layer 520 is not formed. The region where the embossed portion is formed may correspond to the non-patterned portion NPA, and the region where the depressed portion is formed may correspond to the patterned portion PA. The upper surface of the base member 510 may be exposed by the printing layer 520. At this time, the light transmittance of the base member 510 may be higher than the light transmittance of the print layer 520. Therefore, the shape of the pattern unit PA can be realized by the light emitted upward in the pattern member 500.

The thickness of the base member 510 may be about 20 [mu] m to about 60 [mu] m. In detail, the thickness of the base member 510 may be about 21 [mu] m to about 55 [mu] m. More specifically, the thickness of the base member 510 may be about 22 [mu] m to about 52 [mu] m. Preferably, the thickness of the base member 510 may be from about 23 [mu] m to about 50 [mu] m. It is not easy to form the printing layer 520 on the base member 510 and the light passing through the base member 510 is uniformly formed A hot spot phenomenon may occur in which light is concentrated in a specific region without scattering. Also, when the thickness of the base member 510 exceeds about 60 탆, the amount of light transmitted through the base member 510 is reduced, thereby lowering the overall brightness. Therefore, the pattern of the illumination device 1000 may not be recognized from outside.

The thickness of the printing layer 520 may be about 15 [mu] m to about 30 [mu] m. In detail, the thickness of the printing layer 520 may be about 20 [mu] m to about 30 [mu] m. When the thickness of the printing layer 520 is less than about 15 탆, light can be transmitted through the printing layer 520. In addition, when the thickness of the printing layer 520 is more than about 30 占 퐉, the number of printing processes may be increased to lower the process efficiency, and the overall thickness of the lighting apparatus may be increased.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the embodiments and comparative examples. These embodiments are merely illustrative of the present invention in order to explain the present invention in more detail. Therefore, the present invention is not limited to these embodiments.

Example 1

A light emitting member is disposed on a side surface of the light guide plate, and a reflecting member is disposed on a lower portion of the light guide plate. In addition, a pattern member including a pattern portion and a non-pattern portion is disposed on the light guide plate.

The pattern member includes a base member and a printing layer.

The base member had a thickness of 23 μm and a white polyethylene terephthalate (PET) film was used. In addition, a print layer was formed on the base member in a region corresponding to the non-pattern portion using a black ink composition.

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Example 2

The pattern member was fabricated in the same manner as in Example 1 except that the base member and the print layer were formed and the base member had a thickness of 50 mu m.

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Comparative Example 1

The pattern member was made in the same manner as in Example 1 except that the base member and the print layer were formed, and the base member had a thickness of 75 탆.

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Comparative Example 2

The pattern member was fabricated in the same manner as in Example 1 except that the base member and the print layer were formed, and the base member had a thickness of 100 mu m.

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Comparative Example 3

The pattern member was fabricated in the same manner as in Example 1 except that the base member and the print layer were formed, and the base member had a thickness of 125 탆.

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Comparative Example 4

The pattern member was formed in the same manner as in Example 1 except that the base member and the print layer were formed, and the base member had a thickness of 200 mu m.

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Comparative Example 5

The pattern member includes a base member and a printing layer.

The base member had a thickness of 100 탆 and a colorless transparent polyethylene terephthalate (PET) film was used.

Also, a first printing layer is formed on the base member corresponding to the non-pattern portion using a black ink composition, and a second printing layer is formed on the region corresponding to the pattern portion using a white ink composition. .

Then, the haze value, the color coordinate value and the transmittance of the illumination device according to the example were measured.

Haze (%) The color coordinate (b *) Color coordinates (L *) Total light transmittance (TT) (%) Example 1 92.96 4.83 62.01 30.42 Example 2 92.97 5.81 57.83 25.78 Comparative Example 1 92.92 8.66 34.26 8.13 Comparative Example 2 93.01 3.92 50.85 6.15 Comparative Example 3 92.91 10.68 30.36 6.38 Comparative Example 4 92.76 16.42 38.83 1.38 Comparative Example 5 92.98 4.56 60.05 28.20

The color coordinates (b *) and the color coordinates (L *) are related to the CIE LAB color space.

The color coordinates in the CIE LAB color space are represented by L *, a * and b *, the color coordinates L * are degrees of brightness, the color coordinates a * are red and green, And the color coordinate b * is a three-dimensional coordinate indicating the degree of yellow (Yellow) and blue (Blue).

In detail, when the value of the color coordinate (L *) is positive, it means bright. When the value of the color coordinate (L *) is negative, it means dark. If the value of the color coordinate (a *) is positive, it means red. If the value of the color coordinate (a *) is negative, it means green. If the value of the color coordinate b * is a positive value, it means yellow, and if the value of the color coordinate b * is a negative value, it means blue.

The pattern member 500 is required to have a haze value of greater than 90.21% in order to prevent hot spot phenomenon from occurring. Further, in order to realize white color coordinates (b *), a value larger than -2 and smaller than 6 is required. Also, a color coordinate (L *) value greater than 57% is required. Further, the total light transmittance (TT) value of the pattern member 500 is required to be larger than 25%.

Referring to Table 1, it can be seen that the illuminating device according to the embodiments is superior to the illuminating device according to the comparative examples in the value of the color coordinate b *, the value of the color coordinate L * and the total light transmittance TT.

In detail, when the base member is a white PET film, the value of the color coordinate (b *) increases as the thickness of the base member increases, so that it can be seen as yellow.

In addition, when the base member is a white PET film, the value of the color coordinate (L *) is lowered as the thickness of the base member is increased, and the brightness (brightness) of the whole is lowered.

In addition, when the base member is a white PET film, the total light transmittance (TT) value decreases as the thickness of the base member increases.

Comparative Example 5 is a general manufacturing method of a pattern member. In the past, a pattern member was produced by forming print layers on a base member which is a colorless transparent PET film as described above.

In detail, a first printing layer is formed of a black ink composition on the base member corresponding to the non-pattern portion, and a white ink is applied to prevent a hot spot from being generated on a region corresponding to the pattern portion. A second printed layer was formed with the composition. As described above, the base member is required to have a thickness of at least 100 탆 in order to form at least two print layers.

However, the illumination device according to the embodiment can reduce the thickness of the pattern member by using a white PET film as a base member.

In detail, by using a base member having a thickness of about 23 占 퐉 to about 50 占 퐉, characteristics corresponding to those of the conventional pattern member can be exhibited, and the thickness can be reduced to improve the total light transmittance (TT). As a result, it is possible to reduce the thickness of the illumination device and realize a lighting device with a slim structure.

Referring now to Fig. 4, a lighting apparatus according to a second embodiment will be described. In the description of the illumination device according to the second embodiment, description of the same configuration as the illumination device according to the first embodiment described above will be omitted, and the same reference numerals are assigned to the same configurations.

4, the illumination device 1100 according to the second embodiment includes a cover case 100, a light emitting member 300, a reflecting member 400, a pattern member 500, and a transflective member 600 .

The light emitting member 300 may be disposed on the reflective member 400. For example, the light emitting member 300 may be disposed between the reflective member 400 and the pattern member 500.

That is, the light emitting member 300 may emit light directly in a direction in which the pattern member 500 is disposed. The light reflected from the light emitting member 300 to the lower portion of the light emitting member may be emitted upward in the direction of the pattern member 500 through the reflective member 400.

The light emitting member 300 may include light emitting diodes.

The light emitting diodes may include a blue light emitting diode for generating blue light and / or a UV light emitting diode for generating ultraviolet light. That is, the light emitting diodes can emit blue light having a wavelength range of about 430 nm to about 470 nm or ultraviolet light having a wavelength band of about 300 nm to about 400 nm.

The light emitting diodes may be mounted on the printed circuit board 350. The light emitting diodes may be disposed below the printed circuit board 350. The light emitting diodes may be driven by receiving a driving signal through the printed circuit board 350.

The printed circuit board 350 may be electrically connected to the light emitting diodes. The printed circuit board 350 may mount the light emitting diodes. The printed circuit board 350 may be disposed inside the cover case 100.

5, a lighting apparatus according to the third embodiment will be described. In the description of the illumination device according to the third embodiment, the same components as those of the illumination device according to the first embodiment and the second embodiment described above are not described, and the same reference numerals are assigned to the same components.

5, a lighting apparatus 1200 according to the third embodiment includes a cover case 100, a light guide plate 200, a light emitting member 300, a reflective member 400, a pattern member 500, (600).

The light emitting member 300 may generate light. The light emitting member 300 may transmit light toward the light guide plate 200. The light emitting member 300 may be disposed adjacent to the light guide plate 200. For example, the light emitting member 300 may be disposed on one side of the light guide plate 200. The light emitting member 300 may allow 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 light transmitting unit 320.

The light source 310 may be connected to a power source to generate light energy. The light source 310 may be any generally used light source such as an incandescent lamp, an LED, a lamp, a mercury lamp, a discharge tube, a neon lamp, and a bulb. Various colors may be used for the light source 310 according to a user's request.

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

The light transmitting portion 320 may be flexible. The light transmitting portion 320 may include plastic. For example, the light transmitting portion 320 may be an optical fiber. That is, the light transmitting portion 320 may be an optical fiber bundle including a plurality of light transmitting portions.

Since the light transmitting portion 320 includes a flexible material, the light transmitting portion 320 may be bent inside the cover case 100 and be accommodated in the cover case 100.

The light transmitting portion 320 may be disposed in contact with the light guide plate 200 in whole or in part. In addition, the light transmitting portion 320 may be disposed in direct or indirect contact with the light guide plate 200.

6 and 8 are views showing an example in which the illuminating device according to the embodiment is applied to a household appliance.

Referring to Figs. 6 and 8, the lighting apparatus according to the embodiments can be applied to a refrigerator.

For example, the lighting apparatus 1000 according to the embodiment may be located outside the refrigerator 5000 and used as an information display unit of the refrigerator 5000. In detail, the lighting apparatus 1000 can display the refrigerator compartment temperature and the freezer compartment temperature of the refrigerator 5000. In addition, the lighting apparatus 1000 can display the operation of various functions of the refrigerator 5000, such as rapid freezing, power saving mode, and lock mode, as visual information.

The illumination device 1000 may be disposed between the lower cover member 2100 and the upper cover member 2200.

The lower cover member 2100 and the upper cover member 2200 may include glass, plastic, metal, or the like. The lower cover member 2100 and the upper cover member 2200 may include materials corresponding to each other. Alternatively, the lower cover member 2100 and the upper cover member 2200 may include different materials.

The lower cover member 2100 and the upper cover member 2200 may be plate-shaped. The lower cover member 2100 and the upper cover member 2200 may be flexible. In addition, the lower cover member 2100 and the upper cover member 2200 may include curved surfaces.

The upper cover member 2200 may be an outermost member. The upper cover member 2200 can transmit or semi-transmit light. For example, the upper cover member 2200 may be a door plate of the refrigerator 5000. In addition, the lighting apparatus 1000 according to the embodiment can be disposed below the upper cover member 2200 without the lower cover member 2100. FIG.

At this time, the transflective member 600 may have a color corresponding to the upper cover member 2200. In detail, the second transflective layer 620 may have a color corresponding to the upper cover member 2200. Accordingly, when the illumination device is off as shown in FIG. 7, the illumination device may not be visible and may have the same texture as the upper cover member 2200. Thus, the lighting device according to the embodiment can have an improved appearance when applied to household appliances.

That is, the light emitted from the light emitting member 300 may be transmitted upward of the pattern member 500, and the light passing through the pattern member 500 may be transmitted through the transflective member 600 and / And can be viewed by the user while passing through the upper cover member 2200.

In addition, the lighting apparatus 1000 may be used as a control panel of the refrigerator 5000 by disposing a touch panel. In detail, a touch panel 3000 including a touch electrode capable of performing a touch function may be disposed on the illumination device 1000. The touch panel 3000 may be disposed at a position corresponding to the illumination device 1000. The touch panel 3000 may be disposed directly above or below the lighting apparatus 1000 and may be disposed below the upper cover member 2200.

Accordingly, the on / off function of the illumination device 1000 can be performed according to the touch operation. For example, the refrigeration temperature or the refrigeration temperature of the refrigerator 5000 may be changed by touching the refrigeration temperature or the refrigeration temperature shown in FIG.

In other words, the illumination device 1000 according to the embodiment can reduce the thickness of the pattern member 500, thereby reducing the thickness of the overall illumination device, and preventing the formation of a step in forming the print layer 520 So that light can be uniformly moved in the upper direction of the pattern member 500. In addition, the process of forming the print layer 520 can be simplified to improve process efficiency.

In addition, when the illumination device 1000 is off, the pattern of the pattern member 500 may not be recognized by the transflective member 600. The semi-transmissive member 600 may be formed in a color corresponding to the upper cover member 2200 so that when the illumination device 1000 is off, the illumination device 1000 is not visible . Accordingly, the lighting apparatus 1000 is not visually recognized from the outside, so that it can have an improved appearance.

The features, structures, effects and the like described in the foregoing embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified and implemented. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

Claims (12)

A light guide plate;
A light emitting member disposed on one side of the light guide plate; And
And a pattern member disposed on the light guide plate and including a pattern portion and a non-pattern portion,
Wherein the pattern member comprises:
A base member; And
And a first printing layer disposed on the base member and disposed on a region corresponding to the non-pattern portion,
Wherein the base member is white. The method according to claim 1,
Wherein the light transmittance of the base member is higher than the light transmittance of the first print layer. The method according to claim 1,
Wherein the thickness of the base member is 20 占 퐉 to 50 占 퐉. The method according to claim 1,
Wherein the first printed layer is black. The method according to claim 1,
Wherein the first printing layer has a thickness of 15 to 30 占 퐉. The method according to claim 1,
And a top surface portion of the base member corresponding to the pattern portion is exposed by the first printing layer. The method according to claim 1,
Further comprising a semi-transparent member disposed on the pattern member,
The semi-
A first semi-transparent layer disposed on the pattern member; And
And a second semi-permeable layer disposed on the first semi-permeable layer,
Wherein the light transmittance of the first transflective layer is lower than the light transmittance of the second transflective layer. A reflective member;
A light emitting member disposed on the reflective member;
And a pattern member disposed on the light emitting member and including a pattern portion and a non-pattern portion,
Wherein the pattern member comprises:
A base member; And
And a first printing layer disposed on the base member and disposed on a region corresponding to the non-pattern portion,
Wherein the base member is white. 9. The method of claim 8,
Wherein the light transmittance of the base member is higher than the light transmittance of the first print layer. 9. The method of claim 8,
Wherein the first printed layer is black. 9. The method of claim 8,
Wherein the first printing layer has a thickness of 15 to 30 占 퐉. 9. The method of claim 8,
Further comprising a semi-transparent member disposed on the pattern member,
The semi-
A first semi-transparent layer disposed on the pattern member; And
And a second semi-permeable layer disposed on the first semi-permeable layer,
Wherein the light transmittance of the first transflective layer is lower than the light transmittance of the second transflective layer.

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