KR20230012753A - surface emitting lumination device - Google Patents

Abstract

The present invention relates to a surface-emitting lighting device using a separate LED strip, which comprises: a light guide plate (10) on which a fine pattern (P) is formed; a channel (20) having a pair of first and second channels (21, 22) facing each other inside the edge of the light guide plate 10 and a third channel (23) connecting the first and second channels (21, 22); first and second LED strips (30, 30') inserted into the first and second channels (21, 22) and implemented by mounting a plurality of LED chips (32) at regular intervals on a flexible substrate (31); a wire (40) inserted into the third channel (23) and connecting the first and second LED strips (30, 30'); fixing belt (50, 50') being fitted into the first and second channels (21, 22) to fix the first and second LED strips (30, 30') not to be separated from the first and second channels (21, 22), and a channel communication groove (60) formed on one side of the light guide plate (10) to communicate with the first channel (21). The purpose of the present invention is to provide a surface-emitting lighting device using a separate LED strip, which can simplify the manufacturing process by manufacturing without using a separate edge frame.

Description

Surface emitting lighting device using a detachable LED strip {surface emitting lumination device}

The present invention relates to a lighting device for surface-emitting lighting, and more particularly, to a surface-emitting lighting device using a detachable LED strip that enables high-quality surface-emitting lighting using the detachable LED strip.

A surface-emitting lighting device is a device for irradiating light through a surface, and since it can be operated with low power and can be manufactured in various sizes, it has been used simply for lighting in the past, but recently it has been used for publicity or product advertising information. The range of use is also widening for delivery purposes.

A surface-emitting lighting device includes a light guide panel having a fine pattern formed on the surface, a pair of LED strips mounted with a plurality of LED chips installed on both sides of the light guide panel, and a light guide panel for fixing the LED strip to the side surface of the light guide panel. It was completed by including an edge frame having a “U” shape in cross section and attaching an information sheet on which information contents were printed to the light guide plate.

In such a surface-emitting lighting device, the light emitted from a pair of LED strips is irradiated into the light guide plate, reflected from the bottom and diffused through the pattern, and as a result, the surface light is irradiated to the entire surface of the information sheet to make the printed information clear. display Prior art related to this is disclosed under the name of a light guide plate and a surface lighting device in Patent Publication No. 10-2018-0121634.

However, in the case of the surface-emitting lighting device, since the LED strip is fixed to the light guide plate by the edge frame, processes such as manufacturing and cutting the edge frame to the required length and fixing the LED strip to the edge frame are required, resulting in overall The manufacturing process was complicated.

In addition, since custom-made lighting devices have various sizes, the size of the light guide plate is inevitably varied, whereas the LED strip is standardized and has a constant overall length. Therefore, if the length of one side of the light guide plate of the ordered lighting device is longer than the standardized LED strip, shadows may be generated at both ends of the light guide plate, and these shadows appear more prominent when there is a white area in the information sheet, resulting in surface light emission. There was a problem that it became the cause of deterioration of quality.

The present invention has been created to solve the above problems, and an object of the present invention is to provide a surface emitting lighting device using a detachable LED strip, which can simplify the manufacturing process by manufacturing without using a separate edge frame.

Another object of the present invention is to provide a surface emitting lighting device using a detachable LED strip capable of enabling high-quality surface light emission by removing a shaded area from a light guide plate.

In order to achieve the above object, a surface-emitting lighting device using a detachable LED strip according to the present invention includes a light guide plate 10 on which a fine pattern P is formed; A channel having a pair of first and second channels 21 and 22 facing each other inside the edge of the light guide plate 10 and a third channel 23 connecting the first and second channels 21 and 22 ( 20); As inserted into the first and second channels 21 and 22, the first and second LED strips 30 and 30' implemented by mounting a plurality of LED chips 32 at regular intervals on the flexible board 31 ; An electric wire 40 inserted into the third channel 23 and connecting the 1.2 LED strips 30 and 30'; An agent for fixing the position so that the first and second LED strips 30 and 30' are not separated from the first and second channels 21 and 22 by being inserted into the first and second channels 21 and 22 1,2 fixed belt (50) (50 '); and a channel communication groove 60 formed on one side of the light guide plate 10 to communicate with the first channel 21 .

in the present invention. A plurality of LED chips mounted on the flexible substrate 31 of each of the first and second LED strips 30 and 30' are formed as a first chip 32a, a second chip 32b, ... , n-2th When defined as the chip 32n-2, the n−1 th chip 32n−1, and the n th chip 32n, the first and second channels 21 and 31 include the first chip 32a, the th 2 chips 32b, ... , the n−2 th chip 32n−2, and the n−1 th chip 32n−1 are positioned, and at least the n th chip 32n is in the third channel 23 this is located

In the present invention, a first light blocking layer 33 is formed on the surface of the n-th chip 32n located in the third channel 23 to block light from being irradiated to the light guide plate 10, A second light blocking layer 34 is formed on the inner surface of the third channel 23 to prevent light partially passing through the n-th chip 32n from being transmitted to the light guide plate 10 .

In the present invention, the first and second fixing straps 50 and 50' are composed of a plurality of dense first and second elastic curved surfaces 51 and 51'.

In the present invention, a female connector 70 that is inserted into and coupled to the channel communication groove 60 and supplies power to the first LED strip 30; A male connector 80 detachable from the female connector 70; is further included.

According to the present invention, as the first and second LED strips 30 and 30' are fixed to the first and second channels 21 and 22 together with the first and second fixing straps 50 and 50', The manufacturing process can be simplified because it does not use the edge frame used in

In addition, the total length of the first and second LED strips 30 and 30 'has a length at which the LED chips are located in the first and second channels 21 and 22 and also in the third channel 23, The amount of light generated between the LED chip located on both ends of the 1st and 2nd channels 21 and 22 and the LED chip immediately adjacent to it, and the LED chip located inside the 1st and 2nd channels 21 and 22 and the LED chip immediately adjacent to it There is no difference in the amount of light generated between them, so that a shaded area is not generated, and thus, there is an effect that the surface light emission quality of the light guide plate 10 can be improved.

1 is an exploded perspective view of a surface light emitting lighting device using a detachable LED strip according to the present invention;
Figure 2 is an assembly plan view of the surface light emitting lighting device of Figure 1;
Figure 3 is a cross-sectional view taken along line III-III' of Figure 2;
4 is a view for explaining that a first light blocking layer is formed on the surface of the LED chip located in the third channel of FIG. 2;
5 is a view for explaining an elastic curved surface formed on the fixing belt of FIG. 2;
6 is a view for explaining the configuration by extracting the female connector and the male connector of FIG. 2;

Hereinafter, a surface light emitting lighting device using a detachable LED strip according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, what is described as "above" or "above" may include not only what is directly on top of contact but also what is on top of non-contact. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are only used to distinguish one component from another. Singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation. In addition, in the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated bar.

1 is an exploded perspective view of a surface light emitting lighting device using a detachable LED strip according to the present invention, FIG. 2 is an assembly plan view of the surface light emitting lighting device of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III' in FIG. to be. 4 is a view for explaining that the first light blocking layer is formed on the surface of the LED chip located in the third channel of FIG. 2, and FIG. 5 is a view for explaining the elastic curved surface formed on the fixing strap of FIG. 2. 6 is a view for explaining the configuration by extracting the female connector and the male connector of FIG. 2 .

As shown, a surface-emitting lighting device using a separate type LED strip according to the present invention includes a light guide plate 10 having a fine pattern P formed thereon; A channel 20 having a pair of first and second channels 21 and 22 facing each other inside the edge of the light guide plate 10 and a third channel 23 connecting the first and second channels 21 and 22 class; As inserted into the first and second channels 21 and 22, the first and second LED strips 30 and 30' implemented by mounting a plurality of LED chips 32 at regular intervals on the flexible board 31, and ; As being inserted into the third channel 23, the wire 40 connecting the 1.2 LED strips 30 and 30'; The first and second LED strips 30 and 30' are inserted into the first and second channels 21 and 22 to fix the position so that the first and second LED strips 30 and 30' are not separated from the first and second channels 21 and 22. a fixing belt (50) (50'); a channel communication groove 60 formed on one side of the light guide plate 10 to communicate with the first channel 21; a female connector 70 that is inserted into and coupled to the channel communication groove 60 and supplies power to the first LED strip 30; It is characterized in that it includes; a male connector 80 that is detachable from the female connector 70.

The light guide plate 10 is made of a resin material such as acrylic having high transmittance, and fine patterns P are formed on the surface in horizontal and vertical directions to disperse light. The light guide plate 10 may have various shapes, and in this embodiment, a rectangular shape will be exemplified and described.

The channel 20 consists of a pair of first and second channels 21 and 22 facing each other inside the edge of the light guide plate 10 and a third channel 23 connecting the first and second channels 21 and 22. and forms a space in which the first and second LED strips 30 and 30' and the first and second fixing straps 50 and 50' are accommodated.

As shown in FIG. 2, the first and second channels 21 and 22 accommodate the first and second LED strips 30 and 30' and the first and second closing bands 50 and 50'. form space,

The third channel 23 forms a space in which the first and second extension LED strips 30a and 30a' extending from the first and second LED strips 30 and 30' and the wire 40 are accommodated.

The first and second channels 21 and 22 include the first and second channel inner surfaces 21a and 22a and the first and second channel outer surfaces 21b and 22b) spaced apart from each other; It has first and second channel bottom surfaces 21c and 22c connected to the lower ends of the inner side of the second channel and the outer side of the first, second and third channels. And the third channel 23 also has a third channel inner surface, a third channel outer surface, and a third channel bottom surface substantially the same as the first and second channels.

The wire 40 is inserted into the third channel 23 and electrically connects the 1.2 LED strips 30 and 30'.

As shown in FIG. 1 and 2 LED strips 30 and 30', a plurality of LED chips 32 are mounted at regular intervals on a flexible substrate 31 that is thin and flexible. The first and second LED strips 30 and 30' are formed on the first and second channels 21 so that the plurality of LED chips 32 emitting light are opposed to the inner surfaces 21a and 22a of the first and second channels. 22) is stuck in

Meanwhile, the lengths of the first and second channels 21 and 22 are different according to the size or shape of the formed on the light guide plate 10 and the position inside the edge of the light guide plate 10 .

In addition, in the first and second LED strips 30 and 30', the interval between the plurality of LED chips 32 may be wide or narrow according to the output. For reference, the unit price of the LED strip is smaller as the interval between the LED chips is larger, and therefore, the industry prefers the LED strip in which the LED chips are arranged at intervals as large as possible in order to reduce cost.

Accordingly, the lengths of the first and second channels 21 and 22 may be greater than the lengths of the first and second LED strips 30 and 30' according to the size of the light guide plate 10 produced to order. In this case, the first, The amount of light generated between the LED chips positioned at both ends of the two channels (21, 22) and the immediately adjacent LED chips, and between the LED chips positioned inside the first and second channels (21, 22) and the immediately adjacent LED chips. A difference occurs in the amount of light generated in the first and second channels, which causes the amount of light introduced into the light guide plate 10 through the inner surfaces 21a and 22a of the first and second channels to be partially non-uniform. This causes a partial shadow area to be generated in the light guide plate 10 and deteriorates surface light emission quality.

In order to prevent this, the total length of the first and second LED strips 30 and 30' is the length at which the LED chips are located in the first and second channels 21 and 22 and also in the third channel 23. should have

To explain this in more detail, as shown in FIG. 4, a plurality of LED chips mounted on the flexible substrate 31 of each of the first and second LED strips 30 and 30' are formed on the first chip 32a and the second chip 32a. When defined as the chip 32b, ... , the n-2th chip 32n-2, the n-1th chip 32n-1, and the nth chip 32n, the first and second channels 21 In (31), the first chip 32a, the second chip 32b, ... , the n−2 th chip 32n−2, and the n−1 th chip 32n−1 are positioned, and the third channel (23) should be located above the nth chip 32n. In this embodiment, it is illustrated that the n-th chip 32n and the 2n+1-th chip 32n+1 are positioned in the third channel 23 .

At this time, a first light blocking layer 33 is formed on the surface of the nth chip 32n located in the third channel 23 to block light from being irradiated to the light guide plate 10 through the third channel 23 . The first light blocking layer 33 can be implemented in various ways, and in this embodiment, it is a black paint.

In addition, a second light blocking layer 34 is formed on the inner surface of the third channel 23 to prevent light partially passing through the n-th chip 32n from being transmitted to the light guide plate 10 . The second light blocking layer 34 can be implemented in various ways, and in this embodiment, it is a black paint.

By this structure, the amount of light generated between the LED chip located on both ends of the first and second channels 21 and 22 and the immediately adjacent LED chip, and the LED located inside the first and second channels 21 and 22 A difference in the amount of light generated between the chip and the immediately adjacent LED chip is not generated, so that no shadow area is generated, and thus, the surface light emission quality of the light guide plate 10 can be improved.

The wire 40 is inserted into the third channel 23 to electrically connect the 1.2 LED strips 30 and 30'. Accordingly, since one LED strip may be connected to a power source, a relatively neat finish may be made possible.

The first and second fixing bands 50 and 50' fix the positions of the first and second LED strips 30 and 30' to the first and second channels 21 and 22 and at the same time remove a plurality of LED chips. It is for adhering to the inner surfaces 21a and 22a of channels 1 and 2.

The first and second fixing bands 50 and 50' are made of a resin material and are used by cutting a long base material to an appropriate length, and to be inserted into the first and second channels 21 and 22, the first and second channels ( 21) (22) is shorter than the overall length, and the width is slightly smaller than the depth of the first and second channels (21) (22). Accordingly, in a state where the first and second fixing straps 50 and 50' are sandwiched between the first and second channels 21 and 22, as shown in FIG. 3, they are not exposed to the surface of the light guide plate 10. don't

Meanwhile, the first and second fixing straps 50 and 50' are inserted into the empty space between the rear surface of the first and second LED strips 30 and 30' and the outer surfaces 21b and 22b of the first and second channels. The plurality of LEDs 32 constituting the first and second LED strips 30 and 30' are brought into close contact with the inner surfaces 21a and 22a of the first and second channels.

However, when the first and second LED strips 30 and 30' are operated for a long period of time, heat generated from the LED chip 32 causes the first and second channels 20 and 20' and the inner surface 21a of the first and second channels. ) (22a) or the thickness of the first and second fixing straps 50 and 50' may change minutely. In this case, a specific LED chip among the plurality of LED chips 32 may be partially spaced from the inner surfaces 21a and 22a of the first and second channels, and in this case, after being irradiated from the plurality of LED chips 32, The amount of light introduced into the light guide plate 10 through the inner surfaces 21a and 22a of the channels 1 and 2 becomes partially non-uniform. In this case, the luminance of light emitted from the surface of the light guide plate 10 is not constant, and thus the surface light emission quality is deteriorated.

In order to prevent this, as shown in FIG. 5, the first and second fixing straps 50 and 50' are composed of a plurality of dense first and second elastic curved surfaces 51 and 51'. Therefore, when the first and second fixing straps 50 and 50' are inserted between the first and second LED strips 30 and 30' and the outer surfaces 21b and 22b of the first and second channels, the first, Since the second elastic curved surface 51 presses the first and second LED strips 30 and 30' toward the inner surfaces 21a and 22a of the first and second channels, even if used for a long period of time, the LED chip 32 Partial separation from the inner side surfaces 21a and 22a of the two channels can be prevented, and thus, uniform luminance can be maintained at all times, so that high-quality surface light emission can be realized.

The channel communication groove 60 provides a space where the female connector 70 for supplying power to the first and second LED strips 30 and 30' is coupled.

The female connector 70 is installed inside the female connector body 71 directly connected to the flexible board 31 of one end of the first LED strip 30 and the female connector body 71, and the first LED strip 30 and a first terminal 72 electrically connected to the

Since this female connector 70 is connected to the first LED strip 30 to form one body, the first LED strip 30 is inserted into the first channel 20 and the female connector 70 is connected to the channel communication groove 60. It can be assembled to the light guide plate 10 by simply inserting it into the light guide plate.

The male connector 80 is connected to the power line (W) and is installed in the male connector body 81 inserted into the female connector body 71 and the male connector body 81, and is detachable from the first terminal 72 It includes a second terminal 82 connected to each other.

In the surface light emitting lighting device of the present invention, since the male connector 80 can be separated from the female connector 70, many light guide plates 10 in which the female connector 70 is integrated can be produced and stored in a stack.

On the other hand, the female connector 70 should not be separated to the outside of the light guide plate 10 while being inserted into the channel communication groove 60 . To this end, as shown in FIG. 6, a pair of channel steps 25 are formed on the first channel inner surface 21a and the first channel outer surface 21b that meet the channel communication groove 60, and the female connector On both sides of (70), stepped protrusions 75 that are hooked to a pair of channel stepped protrusions 25 are formed. Accordingly, when the female connector 70 is inserted into the channel communication groove 60 so that the step protrusion 75 hangs on the channel step 25, the position of the female connector 70 can be fixed without finishing with an adhesive or the like. .

As such, according to the present invention, the first and second LED strips 30 and 30' are sandwiched and fixed to the first and second channels 21 and 22 together with the first and second fixing straps 50 and 50'. As a result, the manufacturing process can be simplified because the conventionally used edge frame is not used.

In addition, the total length of the first and second LED strips 30 and 30 'has a length at which the LED chips are located in the first and second channels 21 and 22 and also in the third channel 23, The amount of light generated between the LED chip located on both ends of the 1st and 2nd channels 21 and 22 and the LED chip immediately adjacent to it, and the LED chip located inside the 1st and 2nd channels 21 and 22 and the LED chip immediately adjacent to it There is no difference in the amount of light generated between them, so that a shadow area is not generated, and thus, the surface light emission quality of the light guide plate 10 can be improved.

Although the present invention has been described with reference to an embodiment shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

10 ... light guide plate 20 ... channel
21 ... inside channel 22 ... outside channel
23 ... channel bottom 25 ... channel step
30 ... LED strip 31 ... flexible substrate
32 ... LED chip 40 ... tie-down
41 ... elastic curved surface 50 ... channel communication groove
60 ... female connector 61 ... female connector body
62 ... first terminal 65 ... stepped protrusion
70 ... male connector 71 ... male connector body
72 ... second terminal

Claims (5)

a light guide plate 10 on which a fine pattern P is formed;
A channel having a pair of first and second channels 21 and 22 facing each other inside the edge of the light guide plate 10 and a third channel 23 connecting the first and second channels 21 and 22 ( 20);
As inserted into the first and second channels 21 and 22, the first and second LED strips 30 and 30' implemented by mounting a plurality of LED chips 32 at regular intervals on the flexible board 31 ;
An electric wire 40 inserted into the third channel 23 and connecting the 1.2 LED strips 30 and 30';
An agent for fixing the position so that the first and second LED strips 30 and 30' are not separated from the first and second channels 21 and 22 by being inserted into the first and second channels 21 and 22 1,2 fixed belt (50) (50 '); and
A surface-emitting lighting device using a detachable LED strip, characterized in that it includes a; channel communication groove 60 formed on one side of the light guide plate 10 to communicate with the first channel 21. According to claim 1,
A plurality of LED chips mounted on the flexible substrate 31 of each of the first and second LED strips 30 and 30' are formed as a first chip 32a, a second chip 32b, ... , n-2th When defined as the chip 32n-2, the n-1th chip 32n-1, and the nth chip 32n,
In the first and second channels 21 and 31, the first chip 32a, the second chip 32b, ... , the n-2th chip 32n-2, the n-1th chip 32n- 1) is located, and the n-th chip (32n) or more is located in the third channel (23). According to claim 2,
A first light blocking layer 33 is formed on the surface of the n-th chip 32n located in the third channel 23 to block light from being irradiated to the light guide plate 10,
Characterized in that, a second light blocking layer 34 is formed on the inner surface of the third channel 23 to prevent light partially passing through the n-th chip 32n from being transmitted to the light guide plate 10. Surface emitting lighting device using LED strip. According to claim 1,
The first and second fixing straps 50 and 50' are composed of a plurality of dense first and second elastic curved surfaces 51 and 51'. According to claim 1,
a female connector 70 that is inserted into and coupled to the channel communication groove 60 and supplies power to the first LED strip 30;
A surface-emitting lighting device using a detachable LED strip, characterized in that it further comprises; a male connector 80 that is detachable from the female connector 70.

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