KR20090040969A - Cover plate for lighting device - Google Patents

Cover plate for lighting device Download PDF

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Publication number
KR20090040969A
KR20090040969A KR1020070106417A KR20070106417A KR20090040969A KR 20090040969 A KR20090040969 A KR 20090040969A KR 1020070106417 A KR1020070106417 A KR 1020070106417A KR 20070106417 A KR20070106417 A KR 20070106417A KR 20090040969 A KR20090040969 A KR 20090040969A
Authority
KR
South Korea
Prior art keywords
light
cover plate
bubble
layer
lighting device
Prior art date
Application number
KR1020070106417A
Other languages
Korean (ko)
Inventor
황천남
Original Assignee
황천남
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 황천남 filed Critical 황천남
Priority to KR1020070106417A priority Critical patent/KR20090040969A/en
Publication of KR20090040969A publication Critical patent/KR20090040969A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/049—Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/063—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material comprising air or water bubbles, e.g. foamed materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/10—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

The present invention relates to a cover plate for a lighting device that can realize a high light transmittance and diffusivity at the same time, even if the increase in thickness according to the increase in size, the cover plate for the lighting device of the present invention is disposed outside the light source of the lighting device In the cover plate for an illumination device for emitting the light emitted from the light source to the outside, a bubble layer of a predetermined thickness having a myriad of bubbles for scattering the light therein, and integrally formed on one surface of the bubble layer without an interface Characterized in that it comprises a light transmitting layer of a predetermined thickness is not formed inside the bubble. According to the present invention, since the light incident to the inside of the cover plate passes through the transparent light transmitting layer as it is and then diffuses while passing through the bubble layer and exits to the outside, even if the thickness of the cover plate increases, the light transmittance does not decrease. Light diffusivity can be increased.

Description

Cover plate for lighting device {Cover Plate for Lighting Device}

The present invention relates to a cover plate for an illumination device, and more particularly, applied to an advertisement device such as an advertisement board, an illumination lamp for illuminating an interior, or an interior illumination device, and evenly spreads the light emitted from the light source over all parts. In addition, the present invention relates to a cover plate for an illumination device that can emit light having high light transmittance and high brightness even if the thickness thereof is increased.

Recently, various advertisement devices such as advertisements, billboards, self-emitting advertisement devices, etc., are used for product advertisements or business advertisements of various companies. These advertising devices use a variety of pictures, phrases, photographs, drawings, etc. to increase the visibility of information to buyers, especially those that use lighting devices to properly deliver the desired information at night or low light. It is developed a lot.

Typically, advertising devices using such lighting devices are transparent or translucent light transmissive, which emits light from a light source such as a fluorescent lamp or a light emitting diode (LED) and emits the light to the outside while concealing the light source from the outside. A cover plate of material is provided. The cover plate may be attached to a thin film engraved with a picture or phrase for advertising on the surface thereof, or may have a shape such as a specific letter or picture itself.

In addition to the advertising device, the cover plate is also used in lighting devices such as fluorescent lamps, stand lights, street lights, interior lighting.

The cover plate used in such a conventional lighting device is manufactured in such a way that most of the inorganic particles, polymer fine particles partially crosslinked with styrene or acrylic polymer particles and the like are added.

However, the conventional cover plate has a problem that the weight is excessively high due to the specific gravity, and the cost is high. In addition, the conventional cover plate is excellent in the light diffusion, but the light transmittance is low, there is a problem that the overall luminance characteristics are low.

In this regard, the present applicant includes bubbles in a diffuser plate of a lighting device that functions as a cover plate, so that light emitted from a light source is scattered and refracted by the bubbles, thereby increasing light diffusivity while minimizing a decrease in light transmittance. Has developed a lighting device (Registration No. 10-0755010; registered on August 28, 2007).

However, since the diffusion plate (hereinafter, the cover plate) of the conventional lighting apparatus as described above contains bubbles, there is a phenomenon in which the diffusivity is remarkably increased but the light transmittance is lowered compared to the transparent state in which nothing is contained therein.

Therefore, when the size of the advertisement device is increased and the thickness of the cover plate is increased, the number of bubbles increases in proportion to the thickness, and the light transmittance is reduced by that, resulting in a problem that the illuminance (lux) is lowered.

That is, the cover plate including the conventional bubble has a problem that the light transmittance decreases proportionally as the thickness increases.

The present invention is to solve the above problems, an object of the present invention is to provide a cover plate for an illumination device that can provide a high brightness light by minimizing the decrease in light transmittance even if the thickness increases.

The present invention for achieving the above object, in the cover plate for an illumination device disposed outside the light source of the illumination device to emit light emitted from the light source to the outside, there are a myriad of bubbles for scattering light therein Provided is a cover plate for a lighting device, characterized in that it comprises a bubble layer of a predetermined thickness and a light transmitting layer of a predetermined thickness formed integrally without an interface on one surface of the bubble layer, the bubble is not formed therein. .

According to the present invention, since the light incident to the inside of the cover plate passes through the transparent light transmitting layer as it is and then diffuses while passing through the bubble layer and exits to the outside, even if the thickness of the cover plate increases, the light transmittance does not decrease. Light diffusivity can be increased. Therefore, even if the cover plate is enlarged and its thickness is increased, it is possible to provide high luminance light while minimizing the decrease in the light transmittance.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the cover plate for an illumination device according to the present invention.

For reference, the lighting device cover plate of the present invention exemplified below has a flat rectangular plate shape, but the lighting device cover plate of the present invention is a spherical, cylindrical, polyhedron or the like. It may have various forms according to its characteristics.

In addition, the cover plate for the lighting device of the present invention may be disposed directly above the light source of the lighting device, or may be installed to surround the light source, but a light guide plate for emitting light incident from the light source to a surface light source is disposed on one side of the light source. The cover plate may be installed outside the light exit surface of the light guide plate.

1 to 3 illustrate an example of an advertisement device to which a cover plate for an illumination device according to the present invention is applied.

1 and 2, the advertisement device is coupled to a case 10 having one surface opened, a light source 20 installed inside the case 10, and an open surface of the case 10. It is configured to include a cover plate 30.

The light emitting surface in front of the cover plate 30 may be a film or cloth engraved with a predetermined advertising phrase, pattern, photograph, or the like, or may be coated with a predetermined color.

In this embodiment, the light source 20 is composed of a plurality of light emitting diodes (LEDs), but various light sources such as fluorescent lamps may be applied. Reference numeral 21 is a circuit board to which the light emitting diodes are electrically connected and coupled.

The cover plate 30 is a component that covers the light source 20 from the outside and diffuses the light incident therein to the entire surface. The cover plate 30 is a polycarbonate (PC) and polymethylmethacrylate (PMMA). ), MMA (Methylmethacrylate), epoxy, PET (Polyethylene Terephthalate), PP (Polyprophylene), ABS resin, etc. made of a transparent or translucent light transmissive material.

On the other hand, the cover plate 30 can ensure the strength to support itself when the size of the advertising device is increased, the thickness should be increased by that much.

Thus, the cover plate 30 of the present invention has a structure that can minimize the decrease in the light transmittance even if the thickness increases.

That is, as shown in FIG. 3, the cover plate 30 includes a bubble layer 31 having a predetermined thickness including a large number of bubbles 33 for scattering light, and the bubble layer 31. It consists of the multilayer structure of the transparent light transmitting layer 32 of predetermined thickness integrally formed in the back surface without an interface.

The bubble 33 included in the bubble layer 31 has a function of scattering light differently from ordinary particles, and acting to refract light while passing through the bubble 33 to improve light diffusion. do.

The size and content of the bubble 31 preferably has a size of approximately 10 to 700 µm and a content of 5 to 35% in consideration of light scattering and permeability.

When the content of the bubbles 31 per unit volume of the cover plate 30 is 35% or more, the light diffusivity increases, but the light transmittance decreases, and the content of the bubbles 31 per unit volume of the cover plate 30 is less than 5%. In this case, the scattering degree of light is lowered and the light diffusivity is remarkably lowered.

In addition, when the size of the bubble 31 is less than 10㎛, the light diffusivity is good, but it is practically impossible to form bubbles when mass production of the product. In addition, when the size of the bubble is 700㎛ or more diffuse, but due to the size of the bubble is a phenomenon that the light source is observed with the naked eye finely from the outside.

In order not to have an interface between the light transmitting layer 32 and the bubble layer 31, the light transmitting layer 32 and the bubble layer 31 are made of the same synthetic resin material, and the bubble layer 31 ) And the light transmitting layer 32 are made in such a way that the synthetic resin containing the bubbles 33 and the synthetic resin containing no bubbles 33 are integrally bonded while being superimposed on each other in a paste state.

In addition, the thickness of the light transmitting layer 32 may be two or three times or more than the thickness of the bubble layer 31, and according to the total area of the cover plate 30 and the luminance level to be implemented, etc. 31) and the thickness of the light transmitting layer 32 can be arbitrarily varied.

4, the cover plate 30 is polygonal (triangular in this embodiment) on the outer surface of the light transmitting layer 32, that is, the light incident surface opposite to the light source 20. Uneven patterns 34 may be formed continuously. The pattern 34 may be formed in various forms such as an elongated prism shape, a polygonal pyramid shape, a hemispherical embossing shape, and the like.

The pattern 34 of the cover plate 30 reduces the reflectance by increasing the light receiving area, thereby increasing the amount of light incident.

Referring to the operation of the cover plate 30 of the present invention in more detail as follows.

The light emitted from the light source 20 is incident into the cover plate 30 through the back of the light transmitting layer 32 of the cover plate 30, and the light incident into the cover plate 30 is a transparent light transmitting layer. After passing through (32), it passes through the bubble layer (31).

The light passing through the bubble layer 31 is scattered and refracted by the bubble 33 and diffused outward through the light exit surface in front of the bubble layer 31.

As described above, the cover plate 30 of the present invention passes through the light transmitting layer 32 as it is and then diffuses while passing through the bubble layer 31, and is emitted to the outside, the thickness of the cover plate 30 The increase in the light transmittance provides an advantage that can be increased without decreasing the light transmittance.

On the other hand, when the pattern 34 (see FIG. 4) is formed on the outer surface of the light transmitting layer 32 of the cover plate 30, the light receiving area becomes wider due to the pattern 34. The amount is increased, there is an advantage that can provide more excellent brightness characteristics.

1 is a perspective view showing an embodiment of an advertisement device to which a cover plate for lighting device according to the present invention is applied;

Figure 2 is an exploded perspective view of the advertising device of Figure 1

3 is a cross-sectional view illustrating main parts of the cover plate and the light source of the advertisement device of FIG. 1.

4 is a cross-sectional view of main parts of a cover plate and a light source showing another embodiment of the cover plate according to the present invention;

Explanation of symbols on the main parts of the drawings

10: case 20: light source

21: circuit board 30: cover plate

31: bubble layer 32: light transmitting layer

33: bubble 34: pattern

Claims (3)

In the cover plate for an illumination device disposed on the outside of the light source of the illumination device to emit light emitted from the light source to the outside, It comprises a bubble layer of a predetermined thickness having a myriad of bubbles for scattering light and formed integrally without an interface on one surface of the bubble layer and a light transmitting layer of a predetermined thickness without bubbles formed therein. A cover plate for an illuminating device. The cover plate for an illuminating device according to claim 1, wherein an uneven pattern is continuously formed on an outer surface of the light transmitting layer. The cover plate for an illuminating device according to claim 1 or 2, wherein the light transmitting layer is made of the same material as that of the bubble layer and is laminated on one surface of the bubble layer.
KR1020070106417A 2007-10-23 2007-10-23 Cover plate for lighting device KR20090040969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070106417A KR20090040969A (en) 2007-10-23 2007-10-23 Cover plate for lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070106417A KR20090040969A (en) 2007-10-23 2007-10-23 Cover plate for lighting device

Publications (1)

Publication Number Publication Date
KR20090040969A true KR20090040969A (en) 2009-04-28

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ID=40764173

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070106417A KR20090040969A (en) 2007-10-23 2007-10-23 Cover plate for lighting device

Country Status (1)

Country Link
KR (1) KR20090040969A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240167661A1 (en) * 2021-03-11 2024-05-23 Signify Holding B.V. Illumination device, optical element and luminaire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240167661A1 (en) * 2021-03-11 2024-05-23 Signify Holding B.V. Illumination device, optical element and luminaire

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E902 Notification of reason for refusal
E601 Decision to refuse application