KR20180137138A - Luminescent Road Sign Using LED - Google Patents

Abstract

A light emitting sign of the present invention comprises: a body of a light emitting sign consisting of a front plate with a sign on a front surface and a back plate opposed to the front plate and fixed to the back surface; a plurality of LED light emitting elements mounted in the back plate and emitting predetermined color; and a conversion sheet attached to the front plate in a state of being in close contact with the front plate, diffusing light of the predetermined color emitting in the LED light emitting elements, and converting light of another color. Moreover, by disposing a blue LED light emitting element in the body of the light emitting sign to emit the blue light as white light through the conversion sheet coated with a yellow phosphor, the light emitting sign may achieve high efficiency with low energy consumption power compared to an existing road sign and have excellent moisture-proofness.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light-

The present invention relates to a light emitting type display panel using LEDs, characterized in that the blue light emitted from the blue LED light emitting device diffuses through the optical acid sheet, A method of manufacturing a signboard having an illuminating sign structure of a light weight type that has the same power consumption as that of a light guide plate but is light in weight and which has excellent moisture damping property and low energy consumption power .

In recent years, signs of various shapes and configurations have been developed in order to increase the visibility. Among these, a light emitting type signboard using an illumination device such as LED has been proposed and used. In the case of such a light emitting type sign, the solar cell is mainly used to supply power to the LED regardless of the installation location.

The light emitting type traffic safety sign makes the driver look at the shape by asking the light source to the sign, and the part constituting the pattern is the method which keeps the retroreflective performance at least even if the light is broken by using the retroreflective sheet. The cover uses a light source inside and uses a retroreflective sheet with excellent transmittance to the outside to maintain the existing retroreflective performance without power source.

Light emitting type traffic safety signboards are equipped with products that combine solar light by emitting light at night with low power consumption by asking many LEDs for signs, And the light emitting type signboard is exposed to the outside light source. Therefore, it is necessary to use the warning signs and regulatory signs specified in Article 4 of the Road Traffic Act and Article 3 of the Enforcement Rule of the same Act , Instructional signs, road markings, and auxiliary signs, which are restricted to attention and regulatory signs, are not to be used for instructions and auxiliary signs that contain letters.

However, since the light source used in the illumination type safety sign is installed inside the transmissive retroreflector instead of being seen from the outside, in recent years, the spread of the illuminated sign has been spreading.

In general, the illuminated sign is a direct-type method using a diffusion sheet using an edge type (EDGE type) using a light guide plate and a plurality of LED packaging. The edge method using the light guide plate can have a low power consumption and slim structure, but the larger the size, the larger the weight, and when applied to a large road sign, it is likely to be damaged by an external impact or a draft or cause a safety accident. And it is vulnerable to moisture.

The direct-type LED package has a high reliability compared to the LGP for external temperature difference and humidity, and it is also applicable to large-sized signs because its weight is not so large due to the application of LED packaging having a moisture-proof structure (IP660). However, a large number of LED packages are mounted to form a planar light source using a diffusion plate, power consumption is much higher than that of a light guide plate, and it is difficult to apply a solar module.

Korean Patent Laid-Open Publication No. 10-2013-0023843.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a light emitting type sign used for providing information to a driver or a pedestrian, wherein a blue LED light emitting element is used inside the light emitting type sign plate rear plate, And a diffusion member coated with a yellow phosphor to diffuse blue light to emit white light through a diffusing member. The light guide plate has a lighting structure having a light weight, which is equivalent to the conventional light guide plate but has a light weight, It is an object of the present invention to provide a method of manufacturing a coating sign having excellent moisture resistance and low energy consumption.

However, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a light emitting type display panel comprising a front plate having a guide display on the front surface thereof, a rear plate facing the front plate, A plurality of LED light emitting elements mounted inside the rear plate to emit a predetermined color, and a plurality of LED light emitting elements mounted in close contact with the front plate, And at the same time, converting the light of another color into light of another color.

Wherein the conversion sheet is provided with a conversion phosphor on the surface of the conversion sheet so as to convert light of a predetermined color emitted from the plurality of LED light emitting elements into light of another color so that light is emitted from the plurality of LED light emitting elements Light of a predetermined color is diffused through the conversion sheet and simultaneously converted into light of another color to emit light.

At this time, the plurality of LED light emitting elements are blue LED light emitting elements for emitting blue light,

The converted phosphor coated on the surface of the conversion sheet is composed of a yellow phosphor that converts blue light emitted from the blue LED light emitting element into white light to emit light.

In addition, the front plate may be designed using letters or figures indicating safety signs, and an opposite side where the safety mark is formed on the front plate and a coated opposite side of the conversion sheet coated with the yellow phosphor are attached to each other, As shown in Fig.

Here, the blue LED light emitting device has an emission wavelength of 430 to 460 nm, and the yellow phosphor has a peak wavelength band of 565 nm to 590 nm using blue light emitted from the blue LED light emitting device as an excitation source.

Further, since a special compound is added to the surface of the conversion sheet coated with the yellow phosphor, or dots or embossing or ultrafine pattern structure is formed, the refractive index of the blue light emitted from the LED light emitting device is increased to maximize the light diffusion efficiency It is possible.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

As described above, according to the present invention, a blue LED is disposed inside a light emitting type sign body, and blue light is emitted as white light through a conversion sheet coated with a yellow phosphor, thereby achieving high efficiency with low energy consumption compared to a conventional road sign And has an excellent effect of moisture-proofing.

FIG. 1 is a view illustrating a plurality of LED light emitting devices provided on a rear plate of a light emitting type sign body according to a preferred embodiment of the present invention.
2 is a view illustrating a structure for emitting white light of a light emitting type indicator according to a preferred embodiment of the present invention.
3 is a view showing a front panel of a light emitting type sign body having a safety mark according to a preferred embodiment of the present invention.
4 is a photograph showing an embodiment of the present invention.
5 is a perspective view showing an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

The light-emitting type signboard using the LEDs is installed on the road and in the road to provide any information to the driver or pedestrian.

The light emitting type sign body 100 using the LED is composed of a front plate 110 having a guiding display on the front side and a rear plate 120 facing the front plate 110 and formed on the rear side.

At this time, a plurality of LED light emitting devices 130 emitting a predetermined color are formed in the rear plate 120.

And a conversion sheet formed to adhere to the front plate 110 and configured to diffuse light of a predetermined color emitted from the plurality of LED light emitting devices 130 and to convert the light into light of another color, The light of the predetermined color emitted from the LED light emitting element 130 of the light emitting element 130 is diffused through the conversion sheet and converted into light of another color to emit light.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing a plurality of LED light emitting devices 130 installed on a rear plate 120 of a light emitting type sign body 100 according to a preferred embodiment of the present invention.

Referring to FIG. 1, a blue LED light emitting device is installed inside the back panel 120 of the LED light emitting type sign body.

2 is a view illustrating a structure for emitting white light of a light emitting type indicator according to a preferred embodiment of the present invention.

Referring to FIG. 2, the blue light emitted from the blue LED light emitting device is converted into white light by the conversion sheet 140 coated with the yellow phosphor.

The conversion sheet 140 is provided with a conversion phosphor on the surface of the conversion sheet 140 so as to convert light of a predetermined color emitted from the plurality of LED light emitting devices 130 to light of another color Light of a predetermined color emitted from the plurality of LED light emitting devices 130 is diffused through the conversion sheet 140 and converted into light of another color to emit light.

The surface of the conversion sheet 140 coated with the yellow phosphor is doped with a special compound or embossed or patterned so that the surface of the conversion sheet 140 is convex and the blue light emitted from the LED light- The refractive index is increased and the light diffusion becomes better.

At this time, the surface embossing process or the three-dimensional pattern process of the conversion sheet may be processed only in one portion of the upper portion or the lower portion, or both the upper portion and the lower portion.

In addition, the plurality of LED light emitting devices 130 are blue LED light emitting devices for emitting blue light, and the converted phosphor coated on the surface of the conversion sheet 140 converts the blue light emitted from the blue LED light emitting device into white light And a yellow phosphor for emitting light.

At this time, the blue LED light emitting device 130 has an emission wavelength of 430 to 460 nm, and the yellow phosphor has a peak wavelength band of 565 nm to 590 nm as an excitation source of blue light emitted from the blue LED light emitting device .

Further, the conversion sheet coated with the yellow phosphor has a wide optical alignment angle.

FIG. 3 is a view showing a front panel 110 of a light emitting type sign body having a safety marker 111 according to a preferred embodiment of the present invention.

Referring to FIG. 3, the front plate 110 of the light-emitting type sign body 100 attached to the conversion sheet 140 is a part for providing information to the driver or the pedestrian, .

The front plate 110 may be configured to use letters or figures indicating safety signs 111, traffic signs, construction guide signs, etc., such as various kinds of information necessary for displaying a bend of the road, a speed limit, .

The opposite surface of the front plate 110 where the safety mark is formed and the opposite surface of the conversion sheet 140 coated with the yellow phosphor are attached to each other to be positioned on the front surface of the light emitting type sign body 100, By forming the front plate 110, inflow of rainwater, dust, and the like can be prevented.

4 is a photograph showing an embodiment of the present invention.

Referring to FIG. 4, there is shown a light emitting type display using the LED light emitting device, which shows internal light emission.

A blue LED package is installed on a rear plate 120 of the light emitting type sign body 100 and a translucent sheet 140 coated with the yellow phosphor is formed on an upper end of the rear plate 120, And a front plate 110 having the safety mark attached thereto is formed as a top end portion of the main body to emit light.

5 is a perspective view showing an embodiment of the present invention.

At this time, the gull landmarks illustrated in the drawings are merely examples, and various types of landmarks can be designed.

In addition, since the light emitting type indicator is a technology having an illuminated sign structure of a direct type, the direct light type has a high reliability compared to a light guide plate against external temperature difference and humidity by applying a plurality of LED light emitting elements 130 having a moisture- And it is also possible to apply large-size signs, so that the LED light-emitting type signboard excellent in moisture resistance can be produced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: light emitting type sign body 110: front plate
111: safety cover 120: rear plate
130: LED light emitting element 140: conversion sheet

Claims (7)

In a light emitting type signboard using LEDs installed on roads and India to provide information,
The light-emitting type display panel includes a front panel having a guide mark on the front surface thereof;
A rear plate opposed to the front plate and fixed to the rear surface; A light emitting type sign body comprising: Wow
A plurality of LED light emitting elements mounted inside the rear plate to emit light of a predetermined color;
A conversion sheet attached in close contact with the front plate for diffusing light of a predetermined color emitted from the plurality of LED light emitting elements and converting the light of the predetermined color into light of another color; Wherein light of a predetermined color emitted from the plurality of LED light emitting devices is diffused through the conversion sheet and converted into light of another color to emit light. The method according to claim 1,
Wherein the conversion sheet comprises a conversion phosphor on a surface of the conversion sheet to convert light of a predetermined color emitted from the plurality of LED light emitting elements into light of another color; And the light emitted from the plurality of LED light emitting devices is diffused through the conversion sheet and converted into light of another color to emit light. 3. The method of claim 2,
The plurality of LED light emitting elements may include a blue LED light emitting element for emitting blue light; Lt;
Wherein the conversion phosphor coated on the surface of the conversion sheet comprises: a yellow phosphor for converting blue light emitted from the blue LED light emitting element into white light to emit light; And a light emitting diode (LED) emits light. The method according to claim 1,
Wherein the front plate is configured to use letters or figures representing various areas of a guide sign. 5. The method of claim 4,
Wherein an opposite surface of the front plate formed with a guide mark and an opposite surface of the conversion sheet coated with the yellow phosphor are attached to the front surface of the main body. The method of claim 3,
The blue LED light-
Has an emission wavelength of 430 nm to 460 nm,
The yellow phosphor may be,
And has a peak wavelength band of 565 nm to 590 nm using blue light as an excitation source. 6. The method of claim 5,
On the surface of the conversion sheet coated with the yellow phosphor,
Wherein a special compound is added, or a dot, an embossing or an ultrafine pattern structure is formed, thereby increasing the refractive index of blue light emitted from the LED light emitting device, thereby maximizing the light diffusion efficiency.

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