KR20150011096A

KR20150011096A - Light spread sheet and LED light using it, manufacturing method thereof

Info

Publication number: KR20150011096A
Application number: KR1020130085886A
Authority: KR
Inventors: 구재회; 최영진
Original assignee: 구재회; 최영진
Priority date: 2013-07-22
Filing date: 2013-07-22
Publication date: 2015-01-30

Abstract

A light dispersion sheet is disclosed. A base sheet of transparent and flexible material; And the light scattering material is applied while increasing the density of the light blocking material as it is spaced apart from the center line based on a virtual center line of the base sheet.

Description

TECHNICAL FIELD [0001] The present invention relates to a light dispersion sheet, a fluorescent light type LED using the same, and a method of manufacturing a light dispersion sheet,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light dispersion sheet, a fluorescent lamp type LED using the same, and a method of manufacturing a light dispersion sheet.

Generally, fluorescent lamps and incandescent lamps are most widely used as illumination devices in various places including homes and offices. Particularly, the fluorescent lamps are most widely used as lighting devices because they have less glare than incandescent lamps, In fact.

The fluorescent lamp is configured to enclose a small amount of mercury vapor and argon gas in a sealed glass tube, which is in the form of a rod, to seal the fluorescent tube, and then apply a voltage through both ends to generate light by discharging the gas.

However, since the inside of the glass tube must be completely sealed, the fluorescent lamp has a lot of difficulties in manufacturing the fluorescent tube, and a lot of power consumption is required due to repetitive and frequent switching operations, and the lifetime is rapidly shortened .

In recent years, a variety of products using LEDs have been developed and applied in various industrial fields. In particular, since a high-brightness LED lamp has a semi-permanent lifetime and a very low power consumption, the conventional fluorescent lamp, incandescent lamp, It is expected to replace various lamps including mercury lamps.

In other words, it is possible to reduce the environmental pollution by replacing the conventional lamp which contains various harmful substances through the LED lamp and the short life span, and besides, the energy saving effect can be obtained through the low power consumption of the LED lamp .

To replace the fluorescent lamp, a fluorescent lamp type lighting device having various structures has been developed.

As shown in FIG. 1, in the conventional fluorescent light type LED lighting device shown in Korean Patent Laid-Open No. 10-2010-0054238 (Fluorescent type LED lighting device), many LED chips are arranged under a PCB substrate, And drives the LED chip using the DC current supplied from the converter. Therefore, the structure is complicated, the manufacturing cost is increased, and sufficient heat dissipation can not be performed, which shortens the service life.

In addition, in the conventional fluorescent lamp type lighting apparatus, since the light is irradiated only in a predetermined direction according to the characteristics of the LED lamp having the directivity, there arises a problem that the light source in various directions can not satisfy the demand of the desired user .

In order to solve such a problem, a technique has been devised in which a high power LED module is disposed at both ends of a transparent tube to emit light through the entire transparent tube. However, the problem of uniform light distribution over the transparent tube has not been solved.

The present invention provides an optical dispersion sheet in which LED lights irradiated from both ends of a transparent tube are uniformly dispersed throughout the transparent tube and irradiated to the outside, and a fluorescent lamp type LED using the same.

According to an aspect of the present invention,

A base sheet of transparent and flexible material;

And the light scattering material is applied while increasing the density of the light blocking material as it is spaced from the center line with respect to a virtual center line of the base sheet.

Also,

Wherein the light blocking material is a metallic material that reflects light.

According to another aspect of the present invention,

(a) moving a base sheet of a transparent and flexible material inside the chamber;

and (b) vacuum-depositing the light blocking material so that the light blocking material can be applied while increasing the density of the light blocking material as the center line is spaced apart from the imaginary center line of the base sheet. Method is provided.

According to another aspect of the present invention,

A transparent tube;

A light distribution sheet coupled to the inside of the transparent tube;

And an LED module coupled to both sides of the transparent tube,

A light shielding material is applied to the light dispersion sheet and the light shielding material is applied to the light dispersion sheet with increasing density toward both ends at a position of the center of the transparent tube, .

Also,

And the light blocking material is a metal material.

As described above, the present invention provides an optical dispersion sheet in which LED lights irradiated from both ends of a transparent tube are uniformly dispersed throughout the transparent tube and irradiated to the outside, and a fluorescent lamp type LED using the same.

FIG. 1 is an exploded perspective view of a conventional fluorescent light type LED. FIG.
2 is a plan view of a light dispersion sheet according to an embodiment of the present invention;
3 is a flow chart of a process of manufacturing a light dispersion sheet according to an embodiment of the present invention.
4 is an exemplary view showing a manufacturing process of a light dispersion sheet according to an embodiment of the present invention;
5 is an exploded perspective view of a fluorescent lamp type LED according to an embodiment of the present invention.
6 is a sectional view of a fluorescent lamp type LED according to an embodiment of the present invention.
7 is a perspective view of a fluorescent lamp type LED according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. , Thereby not limiting the spirit and scope of the present invention.

FIG. 2 is a plan view of a light dispersion sheet according to an embodiment of the present invention, FIG. 3 is a flowchart of a process of manufacturing a light dispersion sheet according to an embodiment of the present invention, and FIG. FIG. 5 is an exploded perspective view of a fluorescent lamp type LED according to an embodiment of the present invention, FIG. 6 is a sectional view of a fluorescent lamp type LED according to an embodiment of the present invention, 7 is a perspective view of a fluorescent lamp type LED according to an embodiment of the present invention.

The LED module 30 is coupled to both ends of the transparent tube 20 of the fluorescent lamp type LED 100 of this embodiment. The fluorescent lamp type LED 100 of the present embodiment may not use a PCB substrate and only a few high power LED chips 31 are used. Therefore, it is cheaper than conventional fluorescent type LEDs using many LED chips. The problem is that the transparent tube 20 is uniformly dispersed and irradiated to the outside. If the light dispersion is not smooth, only the transparent tube 20 adjacent to the LED chip 31 is irradiated with light.

In this embodiment, the light-scattering sheet 10 is inserted into the transparent tube 20 so that the light emitted from both ends of the transparent tube 20 can be uniformly irradiated onto the entire transparent tube 20.

The light diffusing sheet 10 of this embodiment comprises a base sheet 11 made of a transparent and flexible material; And the density of the light blocking material increases as the distance from the center line C1 is increased with reference to the virtual center line C1 of the base sheet 10. [

The base sheet 10 may be a PET film. The light blocking material should not only block the light but also reflect it. The light-shielding material is preferably a metallic material with a metallic luster. Various materials such as aluminum, silver, and stainless steel can be used as light shielding materials.

The light shielding material may be applied to the base sheet 11 by a vacuum deposition method, or may be printed by a gravure printing method. Specific examples of the vacuum deposition method include a sputtering method, an electron beam method, and a resistance heating method.

Meanwhile, a method of manufacturing the light dispersion sheet 10 by a vacuum deposition method may be performed in the following order. Will be described with reference to Figs. 3 and 4. Fig.

S11 is a step of moving the base sheet 10 made of a transparent and flexible material in the chamber 200. [

The base sheet 10 wound on the roll is continuously moved. At this time, the inside of the chamber 200 is preferably in a vacuum state.

The light blocking material is applied to the base sheet 10 by the vacuum deposition apparatus 210 so that the density of the light blocking material can be increased with increasing distance from the center line C1 with reference to the imaginary center line C1 of the base sheet 10. [ Vacuum deposition.

By the above vacuum deposition method, the light shielding material can be applied to the upper surface of the base sheet 10 more uniformly, stably, and continuously.

5 is an exploded perspective view of a fluorescent lamp type LED according to an embodiment of the present invention. The fluorescent lamp type LED 100 or the like of this embodiment includes a transparent tube 20; A light distribution sheet 10 coupled to the inside of the transparent tube 20; And an LED module (30) coupled to both sides of the transparent tube (20). The light scattering material may be applied to the light scattering sheet 10 and the light shielding material may be applied to the light scattering sheet 10 at a central portion of the transparent tube 20, .

As shown in FIG. 6, a region of the light scattering sheet 10 having a high density of the light blocking material is located inside the transparent tube 20 adjacent to the LED module 30. Further, in the central region of the transparent tube 20, a region of the light scattering sheet 10 having a relatively low density of the light blocking material is located. As a result, a part of the light irradiated from the LED module 30 penetrates the light scattering sheet 10 and the transparent tube 20 and is emitted to the outside. Further, a considerable amount of light is reflected by the light shielding material applied to the light diffusing sheet 10, and is emitted toward the center of the transparent tube 20 having a relatively low density of the light blocking material.

As a result, as shown in Fig. 7, a fluorescent lamp type LED 100 or the like in which light is dispersed is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Modifications and additions by those skilled in the art to an equivalent range based on the embodiments will also fall within the scope of the present invention.

The light dispersion sheet 10, the transparent tube 20,
LED module (30) Fluorescent type LED (100)

Claims

A base sheet of transparent and flexible material;
Wherein the light diffusing sheet is coated with increasing the density of the light blocking material as it is spaced from the center line with reference to a virtual center line of the base sheet.

The method according to claim 1,
Wherein the light blocking material is a metallic material that reflects light.

(a) moving a base sheet of a transparent and flexible material inside the chamber;
and (b) vacuum-depositing the light blocking material so that the light blocking material can be applied while increasing the density of the light blocking material as the center line is spaced apart from the imaginary center line of the base sheet. Way.

A transparent tube;
A light distribution sheet coupled to the inside of the transparent tube;
And an LED module coupled to both sides of the transparent tube,
A light blocking material is applied to the light dispersion sheet, and the light blocking material is applied to the light dispersion sheet with increasing density toward the both ends at the center of the transparent tube.

The method according to claim 1,
Wherein the light shielding material is a metal material.