KR20070113341A - Bright light emitting signboard - Google Patents

Abstract

A high brightness light emitting signboard is provided to obtain a uniform brightness on the signboard by forming a pattern groove on a waveguide plate and a slant reflective plate on an inner flexible board. A high brightness light emitting signboard includes a signboard body(2), at least one flexible board(4), a transparent epoxy resin layer(7) and a backlight module(8). The signboard body includes a sidewall and a reflective plate. The flexible board is arranged inside a casing along the sidewall of the body. Plural LEDs(Light Emitting Diodes) are formed inwards on the flexible board. The transparent epoxy resin layer is formed in the casing to bury the LEDs and a slant plate. The backlight module is arranged in the casing and includes a waveguide plate and a display sheet. Pattern grooves are formed on the waveguide plate, such that a distance between the pattern grooves gets smaller away from the LEDs.

Description

Bright light emitting signboard

1 is a cross-sectional view of a high brightness luminous sign according to the present invention.

Figure 2 is an exploded perspective view of a high brightness luminous sign according to the present invention.

3 is a schematic cross-sectional view illustrating the structure of the backlight module shown in FIG. 2;

4A and 4B schematically show the arrangement of the substrate and the light emitting diodes when the sign has a relatively large area.

5A and 5B schematically illustrate a pattern of a light guide plate provided in a backlight module.

6 is a view showing a state in which a high-luminance luminous sign according to the present invention is applied to a road marking sheet.

FIG. 7 is a cross-sectional view taken along the line VIII-VIII in FIG. 4B. FIG.

(Explanation of symbols for the main parts of the drawing)

1: high brightness luminous signs 2: body

3: main body side wall 4, 4a: flexible substrate

5a: reflector 5a: inclined plate

6, 6a: light emitting diode 7: transparent epoxy resin layer

8: backlight module 9: light guide plate

10: diffusion sheet 11: lower prism

12: upper prism 13: display sheet

14 solar cell 15 pattern groove

16: transparent plate 17: molding

18: casing

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high brightness luminous signs, and more particularly to high brightness luminous signs, such as road signs or signs that can be easily identified at night using a high brightness luminous diode and can be more easily adjusted.

Generally, road signs are milestones provided at each point of the road to provide drivers or pedestrians with safe driving and accurate road information, and store signs provide shop information such as store names, contact numbers, etc. to customers. In particular, in the case of road signs for identification of roads or mutual names at night, various signs and characters are displayed on the reflector with fluorescent paint so that the contents can be easily identified by drivers or pedestrians. Illumination means such as fluorescent lamps are provided inside to be lit at night so that the surroundings can be easily identified at dark night.

On the other hand, the Republic of Korea Patent No. 10-433716, to improve the visibility of the sign or direction indication perforated on the sign, so that the contents of the sign can be easily identified at night, so that the road of the letters or figures of various shapes on the surface An incision groove formed by cutting and guiding a guide mark or a direction mark is formed, and a high brightness electroluminescent sheet is coated on a transparent film on the front of a fixed size plate of transparent acrylic plates, and a large number of circuit boards are attached to the back of the fixing plate. LED light-emitting diodes are fixed, the LED display unit consisting of an LED cell made of epoxy resin with a light diffusing material added, a solar cell unit that collects solar heat to obtain electricity, a charging circuit unit for charging electrical energy obtained from the solar cell unit, electricity Battery unit for storing energy, Control circuit unit for controlling the flashing light emission of the LED cell, A road sign composed of an illuminance sensor unit is disclosed.

However, the conventional road sign as described above has a configuration in which a plurality of panels including the LED display cell overlap each other, as can be seen from the figure, so that the structure is relatively complicated and light emitted from the LED display cell is The luminance is reduced by passing through the plurality of panels, and there is a problem in that information provided to the sign cannot be accurately recognized at a distance.

In order to solve this problem, the applicant has proposed a "high brightness luminous sign" as disclosed in Utility Model Registration No. 20-0392915.

In the present invention, the sign body is provided with a reflecting plate on the inner bottom, and a band-shaped flexible substrate is provided in the shape of the body along the side wall of the body. The flexible substrate is provided with a plurality of light emitting diodes at regular intervals so as to project from the flexible substrate toward the center of the sign body. The light emitting diodes are embedded by a transparent epoxy resin layer, which is provided to the body by the width of the flexible substrate when the diodes are embedded. A backlight module is provided on the transparent epoxy resin layer to emit light from the light emitting diode and the reflector to the outside with high brightness, and a display panel on which information in the form of letters and figures is displayed is provided on the backlight module.

However, the registration scheme as described above had no problem when the sign size was small when actually manufactured, but when the sign size was large, the difference in luminance between the central part far from the light source and the vicinity near the light source was different. There was a problem that the central part is somewhat dark.

Accordingly, an object of the present invention is to provide a high-luminance light emitting sign that can prevent the occurrence of a difference in luminance between a portion close to the light source and a portion far away, while having a uniform luminance as a whole.

The object as described above comprises: a sign body having side walls provided along edges and provided with a reflecting plate at an inner bottom; At least one flexible substrate provided inside the casing having a U-shaped cross section disposed on the reflecting plate along the side wall of the main body, the plurality of light emitting diodes protruding inwardly at a predetermined interval; A transparent epoxy resin layer provided on the casing to bury the light emitting diodes and the inclined plate; And a light guide plate disposed in a space formed in the casing to emit light from the light emitting diode and the reflecting plate to the outside with high brightness, and having a pattern groove formed densely away from light emitting diodes. It can be achieved by the high-brightness luminous signs according to the invention, characterized in that it comprises a backlight module.

In the above, it may further include an inclined plate provided on the reflecting plate to accommodate the flexible substrate and the outer surface is made of a reflecting plate.

The backlight module may include a diffuser film provided on the light guide plate to diffuse light from the light guide plate, and a lower and upper prism to diverge light from the display sheet at right angles by refracting light passing through the diffuser film. do.

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

1 is a cross-sectional view of a high brightness luminous sign according to the present invention, Figure 2 is an exploded perspective view of a high brightness luminous sign according to the present invention.

As shown in Figs. 1 and 2, the high brightness luminous signs 1 according to the invention comprise a plate-shaped sign body 2 in which side walls 3 are formed along the outer circumferential edge. The body 2 is made of aluminum so as to be light in weight and have a certain strength, and is made in a circle, triangle or square according to the function of the sign 1. The inner bottom of the main body 2 is provided with a reflecting plate 5, which may be a mirror surface formed on the bottom surface of the main body 2 or a reflecting sheet attached to the bottom surface of the main body 2.

According to the invention, a casing 18 having a U-shaped cross section is disposed on the reflecting plate 5 along the side wall 3 of the main body 2, and a flexible substrate 4 such as FR 4 is provided with a casing ( 18) is disposed inside. The casing 18 is shown to have a large width in the upper and lower portions for illustrative purposes, but is actually made to have a small width. Such a flexible substrate 4 can be easily installed along the inner sidewall 3 of a sign of round, square and triangular shape due to its flexible nature.

Light emitting diodes, for example white light emitting diodes 6, are provided at regular intervals on the inner side of the flexible substrate 4 along the side wall 3 of the body 2 such that the light emitting diodes 6 protrude toward the center of the body 2. Since the flexible substrate 4 is provided in a casing 18 having a U-shaped cross section, the light emitting diodes 6 installed in the flexible substrate 4 take the form of being accommodated by the casing 18. Such light emitting diodes 6 may be turned on by, for example, an AC power supply having a voltage of 12V or a DC power supply using a solar cell. The flexible substrate 4 can be fixed to the casing 18 by providing a transparent epoxy resin layer 7 in the casing 18. By providing the transparent epoxy resin layer 7 in the casing 18 by the width of the flexible substrate 4, the flexible substrate 4 is embedded in the transparent epoxy resin layer 7.

On the other hand, as described above, before the epoxy resin layer 7 is embedded in the space of the casing 18, the backlight module 8 for emitting light emitted from the light emitting diodes 6 at high luminance is provided by the casing 18. It is arranged in a circular space formed by. When the backlight module 8 is disposed in a circular space formed by the casing 18, the transparent epoxy resin layer 7 is provided with the casing 18 as shown in FIG. 1 by the width of the flexible substrate 4. By filling in the space between the backlight modules 8, the flexible substrate 4 and the backlight module 8 can be firmly fixed to the main body 1 and the casing 18 by the transparent epoxy resin layer 7 The flexible substrate 4, the light emitting diodes 6 and the backlight module 8 can be prevented from being damaged from flow or external shock.

As shown in FIG. 2, the backlight module 8 scatters light provided from the light emitting diode 6 provided on the sidewall 3 of the sign 1, and guides the light to the outside. The upper prism 12 and made of a fluorescent reflective sheet in the form of letters and figures for representing information such as the diffusion film 10, the lower and upper prisms 11 and 12, the roads and the mutual, which are provided on (9). ) And a display sheet 13 attached on the sheet. The light guide plate 9 guides the light emitted from the light emitting diodes 6, as is well known, to the outside, that is, toward the display sheet 13 at an angle of approximately 18 to 20 degrees. At this time, not only the light emitted from the light emitting diode 6 but also the light reflected from the reflecting plate 5 provided on the bottom of the main body 2 are also guided upward by the light guide plate 9 at the above angle.

According to the present invention, the light guide plate 9 has a circular, triangular or square pattern groove 15 having a denser width as it moves away from the light source, that is, the light emitting diode 6, as shown in FIGS. 5A and 5B. Is formed. Thus, since the pattern groove 15 having a narrower width is formed from the light emitting diode 6 provided at the edge of the sign 1, that is to the side wall 3, toward the center part, the position is far from the light emitting diode 6. The luminance of the center portion may also have the same luminance as that of the edge portion adjacent to the light emitting diode 6. The pattern groove 15 formed in the light guide plate 9 is appropriately made by printing, injection, V-cutting or laser scanning. The shape of the pattern groove 15 as described above has a shape similar to that of the sign 1.

By the light guide plate 9 having the pattern groove 15 as described above, the light emitted from the light emitting diode 6 while the light reflected from the reflector 5 is guided to the outside at an angle of approximately 18 to 20 ,, and the light guide plate It is deflected at an angle of 50 degrees by the diffuse reflection function of the diffusion film 10 provided on (9), and is refracted at an angle of approximately 90 degrees while passing through the lower and upper prisms 11 and 12.

Therefore, when light is emitted outward from the display sheet 13 attached on the upper prism 13, it is emitted at an angle perpendicular to the surface of the display sheet 13. On the other hand, the diffusion film 10 may be omitted by adding a diffusion function to the light guide plate 9. The backlight module 8 as described above can be firmly fixed in the main body 2 by filling a transparent epoxy resin in the gap between the casing 18.

On the other hand, since the light emitted from the light emitting diodes 6 as described above is limited to irradiating a portion located at a distance exceeding approximately 50 cm, therefore, when the size of the sign is relatively large, the light emitting diode The signs are divided into a plurality of sections as shown in FIG. 4B so that light emitted from the (6) lights the display sheet 13 uniformly, and as shown in FIG. The flexible substrates 4a having a width smaller than the sidewall 3 of the side wall 3 are arranged to stand up on the inclined plate 5a at a predetermined distance, that is, at a distance of 50 cm, so that the sign 1 is generally uniform. To investigate.

At this time, the light emitting diodes 6a are inclined at a predetermined angle to prevent light emitted from the light emitting diodes 6 provided on the substrate 4 provided on the side wall 3 from being shielded by the substrate 4a. The inclined plate 5a is provided. The inclined plate 5a is made of a reflecting plate, so that the light emitted from the adjacent light emitting diode is reflected to the outside, so that no dark part is generated.

Incidentally, the inclined plate 5a is determined so that the light emitted from the light emitting diode 6a installed therein can also be emitted to the outside in the length thereof, so that the light emitting diode 6 provided on or adjacent to the side wall 3 is provided. 6a, as well as light from the light emitting diode 6a provided inside the inclined plate 5a is emitted to the outside, the sign 1 can be maintained at high brightness as a whole.

It is preferable that the flexible substrates 4 and 4a have a thickness of about 0.3 mm or less, so that the substrates 4a located in the middle part of the sign 1 are invisible from the outside. Therefore, even in the case of a sign having a relatively large area, the display portion of the sign 1 can be displayed with a uniform brightness as a whole without partially dark portions, so that the driver or customers can recognize the information accurately.

The high-luminance luminous signs 1 according to the present invention having the structure as described above are made of fluorescent reflection sheets for letters and figures for indicating information such as roads and trade names. The information provided on the display sheet 13 can be identified, and in the case of night time, the information provided on the display sheet 13 can be identified by the light emitting diodes 6 emitting light.

On the other hand, as described above, the light emitting diodes 6 used as a light source in the high-luminance light-emitting sign 1 according to the present invention are supplied with power directly from a power line or from a storage battery in which power is stored by a solar cell. Can be. This power supply selection can be determined depending on where and in what purpose the high brightness luminous signs according to the invention are used.

For example, when used as a signboard of a shop in a city or as a road sign, it may take a manner in which power is directly supplied from a power line so that power can be supplied and disconnected by on / off operation of a switch. As shown in 6, when used as a road sign installed in a place where the worker is not easily accessible, such as a highway, the light emitting diodes 6 are connected to the ambient light by using a solar cell 14, a storage battery, or an illuminance sensor. Therefore, it can be configured to automatically turn on and off. Since this power supply scheme is well known, it is omitted herein for clarity of explanation.

On the other hand, the high brightness luminous signs 1 according to the present invention is provided with a transparent plate 16 such as transparent acrylic or NEXAN on the display sheet 13 in order to prevent rain water from penetrating into the sign in rainy weather, the side wall ( The gap between 3) and the edge of the transparent plate 16 is sealed by a molding 17 such as an epoxy resin. Therefore, the molding 17 not only prevents rainwater or the like from penetrating into the interior of the sign 1 through the gap between the side wall 3 and the edge of the transparent plate 16 in rainy weather, and also prevents foreign matter such as dust. By preventing this from penetrating into the sign 1, the durability of the sign 1 can be improved.

As described above, according to the high-luminescent light sign according to the present invention, the occurrence of the difference in luminance between the portion close to the light source and the portion far away by the pattern groove formed in the light guide plate and the inclined reflector provided in the inner flexible substrate is prevented. On the other hand, it can have a uniform brightness as a whole.

On the other hand, although the present invention has been described by way of example road signs in the drawings, it can be used to display characters or information using lights at night in various fields, such as shop signs and guide signs. Those of ordinary skill in the art will understand.

Claims (3)

A sign body having a sidewall provided along an edge and provided with a reflecting plate at an inner bottom; At least one flexible substrate provided inside the casing having a U-shaped cross section disposed on the reflecting plate along the side wall of the main body, the plurality of light emitting diodes protruding inwardly at a predetermined interval; A transparent epoxy resin layer provided on the casing to bury the light emitting diodes and the inclined plate; And a light guide plate disposed in a space formed in the casing for dissipating light from the light emitting diode and the reflecting plate to the outside with high brightness, and having a pattern groove formed densely away from the light emitting diodes. High brightness luminous signs comprising a backlight module. The high brightness light sign of claim 1, further comprising an inclined plate mounted on the reflecting plate to receive the flexible substrate and having an outer surface of the reflecting plate. The display device of claim 1, wherein the backlight module is provided on the light guide plate to diffuse light to the display sheet at right angles by refracting the light passing through the diffusion film to diffuse light from the light guide plate. A high brightness luminous sign comprising a lower and an upper prism.

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