KR20140130402A - Led lighting module - Google Patents

Abstract

The present invention has a purpose of providing an LED light source module which improves an optical structure to emit light of LED emitted from the side surface in the direction perpendicular to the light emitting surface to increase light efficiency. The LED light source module in the present invention for the same comprises a flexible printed circuit board; a light emitting LED package installed on the flexible printed circuit board to emit light from the side surface; a printed pattern part having multiple patterns printed on the flexible printed circuit board to reflect and diffuse the light emitted from the light emitting LED package to be output in the perpendicular direction; and a transparent resin part installed on the printed pattern part to protect the printed pattern part, and emit the light reflected and diffused in the printed pattern part. Therefore the LED light source module in the present invention improves an optical structure for the light of LED emitted from the side surface to be emitted in the direction perpendicular to the light emitting surface to have an advantage of minimizing light loss.

Description

LED light source module {LED LIGHTING MODULE}

The present invention relates to an LED light source module, and more particularly, to an LED light source module having improved optical efficiency by improving the optical structure so that the light emitted from the side emitting LED is emitted in a direction perpendicular to the light emitting surface.

Light emitting diodes (LEDs) are environmentally friendly and can respond to video signals in a fast response time of several nanoseconds. Impulsive driving is possible and color reproducibility is 100% or more. And the brightness, color temperature and the like can be arbitrarily changed by adjusting the light amount of the red, green, and blue LEDs.

In recent years, LEDs have been successfully commercialized using nitride compound semiconductors. As a result, the application range of LEDs has widened with the introduction of high-efficiency three-primary colors and white LEDs, , Highly directional reading, etc., and is used in various fields such as lighting.

On the other hand, the surface light source illumination is generally used for the backlight of a transmissive liquid crystal display panel, but recently its application range has been increasing as it is applied to general illumination and outdoor billboards.

FIG. 1 is a cross-sectional view illustrating a direct-type surface light source illumination device according to the related art. Referring to FIG.

1, the direct-lighting-type surface light source lighting apparatus 10 includes a housing 11, a plurality of light emitting LED packages (not shown) provided at a predetermined interval on a printed circuit board 12 provided inside the housing 11, And a diffuser plate 14 disposed on the front side of the housing 11 so as to mix light emitted from the LED package 13.

However, the direct-type surface light source illumination apparatus 10 according to FIG. 1 has a problem that the light efficiency is lowered due to the diffusion plate 14 and the thickness of the surface light source illumination apparatus 10 is increased.

2, the edge-type surface light source illumination device 20 is configured such that the light-emitting LED package 21 is mounted on the light guide panel 22 (see FIG. 2) And a diffusion plate 23 disposed on the side of the light emitting LED package 21 so that light emitted from the light emitting LED package 21 is incident on the light guide panel 22 and then output in a vertical direction to be mixed.

However, the edge-type surface light source illumination device 20 shown in FIG. 2 has a problem in that optical loss due to the light guide panel 22 is generated.

In addition, there is a problem in that the amount of light is reduced in the central portion of the light guide panel 22 due to light loss, which is not suitable for use for illumination.

In addition, since the conventional direct illumination type or edge illumination type planar light source devices 10 and 20 use a rigid substrate, the application range of the product is limited.

Korean Patent Laid-Open Publication No. 10-2012-0003273 (entitled "Backlight Unit and Liquid Crystal Display Device Using the Same"

In order to solve such problems, it is an object of the present invention to provide an LED light source module having improved optical efficiency by improving the optical structure so that the light emitted from the LED emits light in a direction perpendicular to the light emitting surface.

According to an aspect of the present invention, there is provided a flexible printed circuit board comprising: a flexible printed circuit board made of a polyimide film material to enable roll-to-roll; A light emitting LED package installed at a predetermined interval on the printed circuit board and emitting light to a side of the printed circuit board; A first printed pattern printed on a printed circuit board (110) with a PSR (Photo Solder Resist) ink so as to have an arbitrary pattern size, and a second printed pattern separated from the first printed pattern by a predetermined distance, A second print pattern printed with a small pattern size and a third print pattern spaced apart from the second print pattern by a predetermined distance and having a pattern size smaller than the size of the second print pattern, The third print pattern diffuses the light emitted from the light emitting LED package according to the size of the different print pattern and diffuses light per unit area so that the light emitted from the light emitting LED package is uniformly distributed in the vertical direction A print pattern portion; A transparent resin portion provided on the print pattern portion to protect the print pattern portion and to diffuse the light reflected and diffused by the print pattern portion; And a micro pattern provided on an upper surface of the transparent resin part and controlling light emitted in a vertical direction to form a predetermined light distribution pattern, wherein the printed circuit board, the light emitting LED package, the print pattern part, , And the light source module having a micro pattern is formed by cutting to an arbitrary size according to the size of a product to be applied in a roll-to-roll process.

The present invention also relates to a flexible printed circuit board comprising a polyimide film material to enable roll-to-roll; A light emitting LED package installed at a predetermined interval on the printed circuit board and emitting light to a side of the printed circuit board; A first protrusion pattern protruding in a hemispherical shape forming an arbitrary pattern size on the printed circuit board; a second protrusion pattern spaced a predetermined distance from the first protrusion pattern, forming a pattern size smaller than the size of the first protrusion pattern, And a third protrusion pattern protruding in a hemispherical shape, the protrusion pattern being spaced apart from the second protrusion pattern by a predetermined distance and forming a pattern size smaller than the size of the second protrusion pattern, The first to third protruding patterns are formed by differently reflecting and diffusing light per unit area according to sizes of protruding patterns of light emitted from the light emitting LED package so that light emitted from the light emitting LED package is uniformly distributed in the vertical direction A protruding pattern portion for allowing the protruding pattern portion A transparent resin part provided on the light emitting LED package and the protruding pattern part to protect the protruding pattern part and emit light reflected and diffused by the protruding pattern part; And a micropattern provided on an upper surface of the transparent resin part and controlling light emitted in a vertical direction to form a predetermined light distribution pattern, wherein the printed circuit board, the light emitting LED package, the protruding pattern part, , And the light source module having a micro pattern is formed by cutting to an arbitrary size according to the size of a product to be applied in a roll-to-roll process.

The present invention is advantageous in that the light loss can be minimized by improving the optical structure so that the light emitted from the side emitting LED emits in the vertical direction of the light emitting surface.

Further, the present invention is advantageous in that the production efficiency of the light source module can be improved by performing the roll-to-roll process by applying the flexible substrate.

In addition, the present invention is advantageous in that a light source module is manufactured using a flexible substrate, and the light source module is cut to an appropriate size according to the size of the lighting product.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a direct-type surface light source illumination device according to the prior art.
2 is a cross-sectional view showing an edge-type planar light source illumination device according to the related art.
3 is a cross-sectional view showing the structure of a first embodiment of the LED light source module according to the present invention.
FIG. 4 is an exploded perspective view illustrating the LED light source module according to the first embodiment of FIG. 3; FIG.
FIG. 5 is a cross-sectional view showing a bent state of the LED light source module according to the first embodiment of FIG. 3; FIG.
FIG. 6 is a perspective view illustrating another embodiment of the transparent resin part of the LED light source module according to the first embodiment of FIG. 3; FIG.
7 is a sectional view showing the structure of a second embodiment of the LED light source module according to the present invention.
FIG. 8 is an exploded perspective view illustrating the LED light source module according to the second embodiment of FIG. 7; FIG.
FIG. 9 is a cross-sectional view showing a bent state of the LED light source module according to the second embodiment of FIG. 7; FIG.
10 is a perspective view showing another embodiment of the transparent resin part of the LED light source module according to the second embodiment of FIG.

Hereinafter, a preferred embodiment of the LED light source module according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)

3 is an exploded perspective view showing the LED light source module according to the first embodiment of FIG. 3. FIG. 5 is a cross-sectional view of the LED light source module according to the first embodiment of FIG. 3, Sectional view showing a bent state of the LED light source module according to the embodiment.

3 to 5, the LED light source module 100 according to the first embodiment of the present invention includes a light emitting diode package 120 that emits light in a direction perpendicular to the light emitting surface, A light emitting diode (LED) package 120, a print pattern unit 130, and a transparent resin unit 140.

The printed circuit board 110 is a flexible printed circuit board using a heat resistant film such as a polyimide film.

The light emitting LED package 120 is installed on the flexible printed circuit board 110 at a predetermined interval and has a plurality of LED chips (not shown) so as to emit light having a certain color to the side surface of the printed circuit board 110 ), And preferably outputs white light.

The print pattern unit 130 is formed by printing a plurality of patterns on a printed circuit board 110 and uniformly emitting light emitted in a lateral direction from the light emitting LED package 120 installed on one side in the vertical direction of the printed circuit board 110 And includes a first print pattern 131, a second print pattern 132, and a third print pattern 133 on which patterns are formed to have an arbitrary size.

The first printed pattern 131 is printed and arranged at a distance from the light emitting LED package 120 with an arbitrary pattern size.

The second print pattern 132 is printed so as to have a pattern size smaller than the first print pattern 131 by a certain distance from the first print pattern 131, Is disposed closer to the print pattern 131 than the print pattern 131. [

The third printed pattern 133 is printed so as to have a pattern size smaller than that of the second printed pattern 132 by a certain distance from the second printed pattern 132, Are disposed closer to the print pattern 132 than the print pattern 132. [

That is, the first to third printed patterns 131, 132 and 133 are arranged such that the first printed pattern 131 printed with the greatest size is the most distant from the light emitting LED package 120, The first to third printed patterns 131, 132, and 133 are preferably white PSR (Photo Solder) patterns 132 and 133, respectively, spaced apart from the light emitting LED package 120 by a medium distance resist ink.

Accordingly, due to the characteristics of the LED lighting having a large number of linear components, a large amount of light is incident at a distance close to the LED package 120, and the third printed pattern 133 having a small size is disposed. The first and second printed patterns 131 and 132 are printed with a larger size as they are located at a distance from the light emitting LED package 120 so that reflection and diffusion of light per unit area are increased and output in a vertical direction So that the light can be uniformly distributed.

The transparent resin part 140 is provided on the print pattern part 130 so that the print pattern part 130 is protected and the first to third print patterns 131, 133, and is made of a resin such as epoxy or silicone material.

6, a plurality of micro patterns 141 protrude from the upper surface of the transparent resin part 140 so that light output in the vertical direction can form an arbitrary light distribution pattern .

Therefore, it is possible to minimize the optical loss by improving the optical structure for reflection and diffusion so that the light emitted on the side surface of the light emitting LED package is emitted in the vertical direction of the light emitting surface and by eliminating the diffusion plate structure, The LED light source module 100 is bent to perform a roll-to-roll process, thereby improving the production efficiency of the light source module and cutting the LED light source module 100 into an appropriate size according to the size of the lighting product And can be applied to products of various shapes through bending of the LED light source module 100. [

(Second Embodiment)

7 is an exploded perspective view showing an LED light source module according to a second embodiment of FIG. 7, and FIG. 9 is a cross-sectional view illustrating a second embodiment of the LED light source module according to the second embodiment of FIG. Sectional view showing a bent state of the LED light source module according to the embodiment.

7 to 9, the LED light source module 100 'according to the second embodiment of the present invention includes a light emitting diode package 120, which emits light in the lateral direction, And includes a substrate 110, a light emitting LED package 120, a print pattern portion 130, and a transparent resin portion 140.

The printed circuit board 110 is a flexible printed circuit board using a heat resistant film such as a polyimide film.

The light emitting LED package 120 is installed on the flexible printed circuit board 110 at a predetermined interval and has a plurality of LED chips (not shown) so as to emit light having a certain color to the side surface of the printed circuit board 110 ), And preferably outputs white light.

The protruding pattern part 130 'is formed by protruding a plurality of patterns on the printed circuit board 110. The light emitted from the light emitting LED package 120 is uniformly distributed in the vertical direction of the printed circuit board 110 And includes a first protruding pattern 131 ', a second protruding pattern 132', and a third protruding pattern 133 'having an arbitrary size.

The first protruding pattern 131 'is a pattern protruding, for example, in a hemispherical (or dome) shape, and is arranged at a distance from the light emitting LED package 120 to form an arbitrary pattern size.

The second protrusion pattern 132 'is spaced apart from the first protrusion pattern 131' by a predetermined distance and is formed to have a semi-spherical shape smaller than the hemispherical shape of the first protrusion pattern 131 ' Is disposed at a distance from the light emitting LED package 120 that is closer to the first protruding pattern 131 '.

The third protrusion pattern 133 'is spaced apart from the second protrusion pattern 132' by a predetermined distance and is formed to have a hemispherical size smaller than the hemispherical shape of the second protrusion pattern 132 ' Is located closer to the second protrusion pattern 132 'than the second protrusion pattern 120'.

That is, the first to third protruding patterns 131 ', 132', and 133 'are arranged such that the first protruding pattern 131' having the largest size is disposed at the widest distance from the light emitting LED package 120, 3 protruding patterns 132 'and 133' are arranged apart from the light emitting LED package 120 by a medium distance and a close distance.

Accordingly, due to the characteristics of the LED lighting having a large number of straight line components, a large amount of light is incident at a distance from the light emitting LED package 120, and a third protrusion pattern 133 ' By increasing the size of the first and second protruding patterns 131 'and 132' as they are located at a distance from the light emitting LED package 120, reflection and diffusion of light increase per unit area, Thereby uniformly distributing the light output in the direction.

The transparent resin part 140 'is provided on the light emitting LED package 120 and on the protrusion pattern part 130' to protect the protrusion pattern part 130 ', and the protrusion pattern part 130' And diffused through the first to third protruding patterns 131 ', 132', and 133 'of the first and second protruding patterns 131 and 132', and is made of a resin such as epoxy or silicone.

10, a plurality of micropatterns 141 'protrude from the upper surface of the transparent resin part 140' so that the light output in the vertical direction is incident on the transparent resin part 140 ' .

Therefore, it is possible to minimize the optical loss by improving the optical structure for reflection and diffusion so that the light emitted on the side surface of the light emitting LED package is emitted in the vertical direction of the light emitting surface and by eliminating the diffusion plate structure, The LED light source module 100 'is bent to perform a roll-to-roll process, thereby improving the production efficiency of the light source module and reducing the size of the LED light source module 100' And can be applied to products of various shapes through bending of the LED light source module 100 '.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intentions or customs of the user, the operator, and the interpretation of such terms should be based on the contents throughout this specification.

100, 100 ': LED light source module
110: flexible printed circuit board
120: Luminescent LED package
130: Print pattern part
130 ': protrusion pattern portion
131: first print pattern
131 ': First protrusion pattern
132: second print pattern
132 ': second protrusion pattern
133: Third print pattern
133 ': Third protrusion pattern
140: transparent resin part
141: Micro pattern

Claims (2)

A flexible printed circuit board 110 made of a polyimide film material so as to be roll-to-roll;
A light emitting LED package 120 disposed at a predetermined interval on the printed circuit board 110 and emitting light to a side of the printed circuit board 110;
A first printed pattern 131 printed on the printed circuit board 110 with a PSR (Photo Solder Resist) ink having an arbitrary pattern size and a second printed pattern 131 spaced a predetermined distance from the first printed pattern 131, A second printed pattern 132 printed so as to have a pattern size smaller than the size of the first printed pattern 131 and a second printed pattern 132 spaced from the second printed pattern 132 by a predetermined distance, And a third printed pattern 133 printed so as to have a small pattern size. The first through third printed patterns 131, 132, and 133 may be formed by printing light emitted from the light emitting LED package 120 in different print patterns A printing pattern part 130 for uniformly distributing light emitted from the light emitting LED package 120 in a vertical direction by varying reflection and diffusion of light per unit area according to the size of the light emitting LED package 120;
A transparent resin part 140 installed on the print pattern part 130 to protect the print pattern part 130 and to diffuse light reflected and diffused by the print pattern part 130; And
And a micro pattern (141) provided on an upper surface of the transparent resin part (140) and controlling the light emitted in the vertical direction to form a predetermined light distribution pattern,
The light source module 100 having the printed circuit board 110, the light emitting LED package 120, the print pattern part 130, the transparent resin part 140, and the micro pattern 141 is formed in a roll- And cutting the LED light source module into an arbitrary size depending on the size of the application target product.
A flexible printed circuit board 110 made of a polyimide film material so as to be roll-to-roll;
A light emitting LED package 120 disposed at a predetermined interval on the printed circuit board 110 and emitting light to a side of the printed circuit board 110;
A first protrusion pattern 131 'protruding in a hemispherical shape forming an arbitrary pattern size on the printed circuit board 110 and a second protrusion pattern 131' spaced apart from the first protrusion pattern 131 ' A second protruding pattern 132 'protruding in a hemispherical shape forming a pattern size smaller than the size of the pattern 131' and a second protruding pattern 132 'spaced apart from the second protruding pattern 132' 132 ', 133') formed in a hemispherical shape and forming a pattern size smaller than the size of the first to third protruding patterns (132 ', 132', 133 ' The light emitted from the LED package 120 differs in reflection and diffusion of light per unit area according to the sizes of the protruding patterns, so that light emitted from the LED package 120 is uniformly distributed in the vertical direction A pattern unit 130 ';
The light emitting diode package 120 and the protrusion pattern part 130 'are provided on the upper part to protect the protrusion pattern part 130' and allow the light reflected and diffused from the protrusion pattern part 130 ' A transparent resin part 140 '; And
And a micro pattern (141 ') provided on the upper surface of the transparent resin part (140') for controlling the light emitted in the vertical direction to form a predetermined light distribution pattern,
The light source module 100 'having the printed circuit board 110, the light emitting LED package 120, the protruding pattern portion 130', the transparent resin portion 140 'and the micro pattern 141' Wherein the LED light source module is formed by cutting an arbitrary size according to a size of a product to be applied in a roll-to-roll process.

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