WO2008048026A1

WO2008048026A1 - Led signboards

Info

Publication number: WO2008048026A1
Application number: PCT/KR2007/005040
Authority: WO
Inventors: Tae Kun Yoo
Original assignee: Fawoo Technology Co., Ltd.
Priority date: 2006-10-20
Filing date: 2007-10-16
Publication date: 2008-04-24
Also published as: KR100753963B1

Abstract

An LED signboard including light emitting elements installed in a groove of a transparent resin body is disclosed, which can maximize a lifespan of the light emitting element by protecting the light emitting element against moisture and dust, remarkably enhance the productivity due to reduced material and easy assembly, conveniently manufacture any display designed in complex shape, allow an operator to easily handle and carry it due to the thin thickness, and remarkably improve the aesthetic appreciation and quality by irradiating light from all sides of the body in three dimensions. The LED signboard includes a display board made of a transparent resin panel and having a predetermined shape, and a light emitting element with an LED lamp mounted on a rear of the display. At least one row of groove is formed along a light emitting line on the rear of the display, the light emitting element being installed in the groove. The light emitting element consists of a plurality of LED lamps of side-view type which are mounted on a flexible printed circuit board at regular intervals.

Description

LED SIGNBOARDS

Technical Field

[1] The present invention relates to an LED signboard including light emitting elements installed in a groove of a transparent resin body which can maximize a lifespan of the light emitting element by protecting the light emitting element against moisture and dust, remarkably enhance the productivity due to reduced material and easy assembly, conveniently manufacture any display designed in complex shape, allow an operator to easily handle and carry it due to the thin thickness, and remarkably improve the aesthetic appreciation and quality by irradiating light from all sides of the body in three dimensions. Background Art

[2] As society is complicated, there is keen competition in the advertisement field in order to attract public gaze. Therefore, more effective advertising means have been developed. One of examples is an LED signboard.

[3] Recently the LED signboards are changed from background boards which are utilized for conventional advertisement to character signboards or symbol signboards.

[4] A conventional LED signboard 100 includes, as shown in Fig. 7, a frame 120, a light emitting element 130 installed at a rear portion of the frame 120, a display board 110 of transmissive board installed on a front portion of the frame 120 and designed in any character or shape, and a fixing frame 160 for fixing the display board 110 to the frame 120.

[5] When the LED signboard 110 is installed in a wanted position, a rear board 140 having the same as the display board 110 is mounted on the frame 120, and the rear board 140 is fixed to a structure, such as a wall, by means of a screw 170. In this instance, the light emitting element 130, in which an LED lamp 131 is mounted on a printed circuit board 133, is mounted on the rear board 140.

[6] Then, the display board 110 is disposed at the front of the frame 120, and the fixing frame 160 is fastened to the frame 120.

[7] With the conventional signboard, since the signboard is installed to the structure in several stages, many workers and much assembling time are required. The rear board 140 and the display board 110 should be prepared to have the same shape, and the frame 120 and the fixing frame 160 should be bent to the round appearance of the display board.

[8] Accordingly, a lot of work efforts are required, and it is not possible to manufacture a display board of small characters or complicated round shapes. [9] Also, there is another drawback in that since the light emitting portion is defined by two-dimensional plane, aesthetic appreciation is degraded. Disclosure of Invention

Technical Problem

[10] Therefore, an object of the present invention is to solve the problems involved in the prior art, and to provide an LED signboard including light emitting elements installed in a groove of a transparent resin body which can maximize a lifespan of the light emitting element by protecting the light emitting element against moisture and dust, and remarkably enhance the productivity due to reduced material and easy assembly.

[11] Another object of the present invention is to provide an LED signboard capable of conveniently manufacturing any display designed in complex shape, and allowing an operator to easily handle and carry it due to the thin thickness.

[12] Still another object of the present invention is to provide an LED signboard capable of remarkably improving the aesthetic appreciation and quality by irradiating light from all sides of the body in three dimensions. Technical Solution

[13] In order to achieve these and other objects, the present invention provides an LED signboard including a display board made of a transparent resin panel and having a predetermined shape, and a light emitting element with an LED lamp mounted on a rear of the display; wherein at least one row of groove is formed along a light emitting line on the rear of the display, the light emitting element being installed in the groove; and the light emitting element consists of a plurality of LED lamps of side-view type which are mounted on a flexible printed circuit board at regular intervals.

Advantageous Effects

[14] With the LED signboard of the present invention, it can maximize a lifespan of the light emitting element by protecting the light emitting element against moisture and dust, and remarkably enhance the productivity due to reduced material and easy assembly.

[15] Also, it can conveniently manufacture any display designed in complex shape, and allow an operator to easily handle and carry it due to the thin thickness.

[16] Further, it can remarkably improve the aesthetic appreciation and quality by irradiating light from all sides of the body in three dimensions. Brief Description of the Drawings

[17] The above objects, other features and advantages of the present invention will become more apparent by describing the preferred embodiment thereof with reference to the accompanying drawings, in which:

[18] Fig. 1 is an exploded perspective view illustrating an LED signboard according to one embodiment of the present invention. [19] Fig. 2 is a perspective view illustrating the assembled state of the LED signboard in

Fig. 1.

[20] Fig. 3 is a detailed cross-sectional view taken along line A-A in Fig. 1.

[21] Fig. 4 is a rear view illustrating an LED signboard according to another embodiment of the present invention. [22] Fig. 5 is a cross-sectional view illustrating an LED signboard according to another embodiment of the present invention. [23] Fig. 6 is a cross-sectional view illustrating an LED signboard according to another embodiment of the present invention. [24] Fig. 7 is a cross-sectional view illustrating a conventional LED signboard.

Best Mode for Carrying Out the Invention [25] Reference will now be made in detail to preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. [26] Fig. 1 is an exploded perspective view illustrating an LED signboard according to one embodiment of the present invention. Fig. 2 is a perspective view illustrating the assembled state of the LED signboard in Fig. 1. Fig. 3 is a detailed cross-sectional view taken along line A-A in Fig. 1. [27] Referring to Figs. 1 to 3, an LED signboard 1 according to an embodiment of the present invention includes a display board 10 made of a transparent resin panel and having a predetermined shape, and a light emitting element with an LED lamp mounted on a rear of the display 10. At least one row of groove 11 is formed on the rear of the display 10, the light emitting element 30 being installed in the groove. The light emitting element 30 consists of a plurality of LED lamps 31 of side-view type which are mounted on a flexible printed circuit board 33 at regular intervals. [28] Preferably, a first coloring member 51 is provided on a part of an exposed surface or the entire surface of the display 10 to change the light emitted from the LED lamp into wanted color.

[29] The first coloring member 51 may be made of a color acrylic sheet or color film.

[30] Also, the first coloring member 51 may be made of a color member or a translucent material, such as Korean paper, which can be coated on the display. [31] As an alternative embodiment, a second coloring member 52 which is made by mixing dye or colored glass powder with transmissive molding material, such as epoxy, is applied in the groove 11, as shown in Fig. 5. [32] Preferably, the groove 11 with the light emitting element 30 is filled with a transmissive molding material 55 to fix and waterproof the light emitting element 30. [33] In case the groove 11 is formed in one row, the groove 11 may be positioned at a center line of the display. [34] Plural grooves 11 receiving the light emitting element 30 may be provided on the display, as shown in Fig. 4, in case a light diffusing area is wide. [35] As shown in Fig. 6, a reflective sheet 61 may be attached to the rear surface of the display 10. [36] In case of utilizing a high-luminance LED, a heat radiating sheet 63 may be attached to the printed circuit board 33 in the groove 11, and extends to the rear surface of the display, in order to radiate the heat generated from the high-luminance LED (see Fig.

6). [37] When viewing at a side or an oblique angle, the LEDs are seen as a dot line. In order to prevent it, a reflective side tape 70 is adhered to the side of the display. [38] In this instance, the light is reflected from the side, thereby further brightening the front of the display (see Fig. 6). [39] Production and operation of the LED signboard according to the present invention will now be described herein. [40] A transparent resin panel is cut to form the display having a wanted character or shape by using a computer aided engraving machine or NC machine. The groove serving as a light emitting line groove to receive the light emitting element is formed simultaneously with machining at the same time the display is made. [41] Preferably, the first coloring member 51 made of acrylic sheet or film may be cut, with it being adhering to a transparent resin panel. [42] The second coloring member 52 which is made by mixing dye or colored glass powder with transmissive molding material, such as epoxy, may be applied in the groove 11. [43] The light emitting element 30, in which the LED lamps 31 are mounted on the printed circuit board 33 at regular intervals, is fitted into the groove 11, and the groove

11 is filled with a transmissive molding material 55 to fix and waterproof the light emitting element 30. [44] The assembly of the signboard according to the present invention is completed by in serting the light emitting element 30 into the display 10 and filling the transmissive molding material in the groove 11. As compared with a conventional signboard utilizing frames and fixing frames which are required for a lot of work effects, therefore, it can remarkably enhance the productivity due to reduced material and easy assembly. [45] The above feature is further enhanced in case of the complicated display, and any complicated display can be manufactured. [46] A thickness of the LED signboard is decreased by installing the light emitting element in the groove 11 which is formed in the display, thereby allowing an operator to easily handle and carry it.

[47] Also, the light emitted from the side-view LED lamp 31 installed in the groove 11 transmits the display 10 made of the transparent resin panel in all directions, thereby remarkably improving the aesthetic appreciation and quality.

[48] The colored light can be selected by using the coloring members.

[49] While the present invention has been described and illustrated herein with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention that come within the scope of the appended claims and their equivalents. Industrial Applicability

[50] With the above description, according to the LED signboard of the present invention, it can maximize a lifespan of the light emitting element by protecting the light emitting element against moisture and dust, and remarkably enhance the productivity due to reduced material and easy assembly.

[51] Also, it can conveniently manufacture any display designed in complex shape, and allow an operator to easily handle and carry it due to the thin thickness.

[52] Further, it can remarkably improve the aesthetic appreciation and quality by irradiating light from all sides of the body in three dimensions.

Claims

[1] An LED signboard including a display board 10 made of a transparent resin panel and having a predetermined shape, and a light emitting element with an LED lamp mounted on a rear of the display 10; wherein at least one row of groove 11 is formed along a light emitting line on the rear of the display 10, the light emitting element 30 being installed in the groove; and the light emitting element 30 consists of a plurality of LED lamps 31 of side- view type which are mounted on a flexible printed circuit board 33 at regular intervals.

[2] The LED signboard as claimed in Claim 1, wherein a first coloring member 51 is provided on a part of an exposed surface or the entire surface of the display 10 to change the light emitted from the LED lamp into wanted color.

[3] The LED signboard as claimed in Claim 2, wherein the first coloring member 51 is made of a color acrylic sheet or color film.

[4] The LED signboard as claimed in Claim 2, wherein the first coloring member 51 is made of a color member or a translucent material which is coated on the display.

[5] The LED signboard as claimed in Claim 1, wherein a second coloring member

52 which is made by mixing dye or colored glass powder with transmissive molding material is applied in the groove 11.

[6] The LED signboard as claimed in Claim 1 or 5, wherein the groove 11 with the light emitting element 30 is filled with a transmissive molding material 55 to fix and waterproof the light emitting element 30.

[7] The LED signboard as claimed in Claim 1, wherein a reflective sheet 61 is attached to the rear surface of the display 10.

[8] The LED signboard as claimed in Claim 1, wherein a heat radiating sheet 63 is attached to the printed circuit board 33 in the groove 11, and extends to the rear surface of the display.

[9] The LED signboard as claimed in Claim 1, wherein a reflective side tape 70 is adhered to the side of the display.