Light-emitting sheet and road sign using same

Abstract

The light emitting sheet (100) excellent in light guiding performance according to an embodiment of the present disclosure may include: a base film (110); and a light guide pattern portion (130) in which a pattern set on a surface of the base film (110) is repeatedly formed, wherein the light guide pattern portion (130) has a hexagonal shape.

Description

Luminescent sheets and road signs using the same

[0001] The present invention relates to a light-emitting sheet and a road sign using the same, and more particularly, to a light-emitting sheet having excellent light-guiding performance, including a pattern formed to improve brightness and illuminance uniformity by uniformly guiding light generated from a light source onto a base film and the surface of the base film, and a road sign using the same to improve visibility so that drivers can more clearly recognize road information while driving.

[0002] Conventional luminescent sheets, which are widely used in advertising signs, road signs, POPs, window signs, etc., have had problems such as requiring a complex manufacturing process or expert assistance during installation, and had difficulty in showing uniform light-guiding performance at various angles or environments.

[0003] Furthermore, road signs, commonly seen on roads, must be clearly recognizable by drivers in all environments for driver safety. However, there are instances where road signs can be difficult to identify, such as during nighttime driving, heavy rain, snow, or foggy conditions. Therefore, there is a pressing need to develop road signs with improved visibility to more clearly convey road information to drivers, even at night, in areas with rapidly changing weather, or where fog frequently occurs.

[0004] The present invention has been devised to solve the above problems, and provides a road sign that improves the visibility of road information for drivers by forming a pattern set on the surface of a base film repeatedly to uniformly guide light generated from a light source, thereby improving the brightness and illuminance uniformity of the light emitting sheet so that letters and figures to be expressed are clearly visible from various angles, and by applying the light emitting sheet together with a separate lighting member and a reflective sheet for improving the brightness of the light source, so that drivers can more clearly recognize road information even in situations where it is generally difficult for drivers to identify, such as at night, in heavy snow, in heavy rain, and in fog.

[0005] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0006] In order to achieve the above technical task, one embodiment of the present invention provides a light-emitting sheet having excellent light-guiding performance, wherein the light-emitting sheet comprises: a base film; and a light-guiding pattern portion repeatedly formed in a pattern set on the surface of the base film; wherein the light-guiding pattern portion may have a hexagonal shape.

[0007] At this time, in the embodiment of the present invention, the light guide pattern part may have a circular pattern center composed of at least one dot located at the center; and a triangular pattern that is a triangle that is bisected based on an imaginary line passing from the center of the pattern center in the 1 o'clock, 3 o'clock, 5 o'clock, 7 o'clock, 9 o'clock, and 11 o'clock directions, and has symmetrical left and right sides.

[0008] In addition, in an embodiment of the present invention, the light guide pattern portion may form a corner pattern in the shape of a fan of the same size that fills the inside of each corner.

[0009] Additionally, in an embodiment of the present invention, the triangle pattern may be formed with each corner having a rounded shape and / or a sharp shape, and each triangle may be formed with the same size.

[0010] Additionally, in an embodiment of the present invention, the light-guiding pattern portion may be printed on the base film with a luminescent ink containing an adhesive to have adhesiveness.

[0011] Additionally, in an embodiment of the present invention, the base film may be formed of a plurality of layers, and each layer may be made of a different material.

[0012] In order to achieve the above technical problem, a road sign according to another embodiment of the present invention comprises: a light-emitting sheet as exemplified above; a plate member formed of a composite plate to support the light-emitting sheet at the rear side of the light-emitting sheet; a frame bottom plate formed along an edge of the composite plate; a lighting member including at least one modular LED at a lower end of the light-emitting sheet to provide light; a first reflective sheet formed on a front side of the light-emitting sheet to improve the brightness of a light source; a frame top plate formed along an edge to be formed in front of the first reflective sheet and be aligned with the frame bottom plate; and a second reflective sheet formed at the frontmost side to improve the brightness of the light source, thereby improving the visibility of road information to a driver.

[0013] In another embodiment of the present invention, the light-emitting sheet may be combined with a separate light guide plate to form the road sign.

[0014] In addition, in another embodiment of the present invention, the first reflective sheet may be combined with a separate light-diffusing polycarbonate to form the road sign.

[0015] In addition, in another embodiment of the present invention, the second reflective sheet may be combined with a separate composite plate to form the road sign, and may include sign information indicating road information on the front.

[0016] According to an embodiment of the present invention, the light-emitting sheet of the present invention and the road sign using the same have a base film and a hexagonal light-guiding pattern portion that is repeatedly formed with a triangular pattern that is a triangle positioned in a set direction from the center of a circular pattern center composed of at least one dot on the surface of the base film, thereby uniformly guiding light generated from a light source, thereby improving the uniformity of brightness and illuminance, and enabling uniform light-guiding performance even at various angles and in various environments. In addition, the light-emitting sheet can be used as a billboard through an easy and simple process of cutting it into desired letters and shapes and attaching it to a transparent material such as acrylic, and by manufacturing a road sign using such a light-emitting sheet, there is an advantage in that visibility can be improved so that drivers can more clearly recognize road information even in situations where drivers' discernment is reduced, such as at night, in heavy rain, in heavy snow, and in fog.

[0017] The effects of the present invention are not limited to the above-described effects, and should be understood to include all effects that can be inferred from the composition of the invention described in the description or claims of the present invention.

[0018] Figure 1 is an image showing a light-emitting sheet according to one embodiment of the present invention.

[0019] Figure 2 is an image showing a road sign according to another embodiment of the present invention.

[0020] FIG. 3a and FIG. 3b are images showing the results of a comparison test of the illuminance of a light-emitting sheet according to one embodiment of the present invention.

[0021] FIG. 4a and FIG. 4b are images showing the results of a comparison test of the illuminance of a light-emitting sheet expressing cut-out characters according to another embodiment of the present invention.

[0022] Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention can be implemented in various different forms and is therefore not limited to the embodiments described herein. In the drawings, irrelevant parts have been omitted for clarity of description, and similar parts have been designated with similar reference numerals throughout the specification.

[0023] Throughout the specification, when a part is said to be "connected (connected, contacted, joined)" to another part, this includes not only cases where it is "directly connected," but also cases where it is "indirectly connected" with another part in between. Furthermore, when a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0024] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0025]

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0027]

[0028] Figure 1 is an image showing a light-emitting sheet (100) according to one embodiment of the present invention.

[0029] Referring to FIG. 1, the light-emitting sheet (100) according to the present invention may be formed of a base film (110) and a light-guiding pattern portion (130) that is repeatedly formed in a pattern set on the surface of the base film (110) and has a hexagonal shape. At this time, the base film (110) may be formed of a plurality of layers, and each layer may be made of a different material. Materials that may be used to form the base film (110) may include polypropylene, polyethylene terephthalate, etc., and the same material may be applied to each layer depending on the manufacturing process, or different materials may be applied or may be mixed and used. In this way, when the base film (110) is formed of a plurality of layers, it may be manufactured by being laminated using a method such as compression or adhesion.

[0030] The above light guide pattern part (130) may have a circular pattern center (131) composed of at least one dot located in the center, and a triangle pattern (132) which is a triangle that is divided into two halves based on an imaginary line passing from the center of the pattern center (131) in the 1 o'clock, 3 o'clock, 5 o'clock, 7 o'clock, 9 o'clock and 11 o'clock directions, such as the a-a' line shown in FIG. 1 (the direction in which the a-a' line shown in FIG. 1 passes is the 11 o'clock direction), and is symmetrical on both the left and right sides. At this time, one corner of the triangle pattern (132) faces the pattern center (131), and one side of the triangle pattern (132) is positioned to face the side of the hexagon of the light guide pattern portion (130). Each corner of the triangle pattern (132) may be formed in a rounded and / or sharp shape, and each triangle forming the light guide pattern portion (130) may be formed to have the same size. In addition, the light guide pattern portion (130) may form a corner pattern (133) in the shape of a fan of the same size that fills the inside of each corner. This corner pattern (133) has an area corresponding to one-third of the pattern center (131) which is circular in shape, so that when three light guide pattern portions (130) come together to form a pattern, it is formed to form one circle, thereby completing a natural pattern.

[0031] In addition, the light-guiding pattern portion (130) may be printed on the base film (110) with a luminescent ink containing an adhesive to have adhesiveness. At this time, since the light-guiding pattern portion (130) has adhesiveness, when manufacturing a light-emitting device using the light-emitting sheet (100), there is an advantage in that the back sheet and the light-transmitting panel can be easily combined. The luminescent component of the luminescent ink composition may be composed of ceramic particles such as titanium oxide or glass, which are generally used in light-guiding sheets (luminescent sheets), and at least one of various synthetic resins such as acrylic, silicone, urethane, vinyl, and polysynthetic resins having an adhesive component may be selected and applied.

[0032] FIG. 3a and FIG. 3b are images showing the results of a comparison test of the illuminance of a light-emitting sheet (100) according to one embodiment of the present invention.

[0033] Referring to FIGS. 3A and 3B, FIG. 3A shows the illuminance of a light-emitting sheet to which a previously developed pattern has been applied, and it is 6930 lux. Similarly, FIG. 3B shows the illuminance of a light-emitting sheet (100) according to an embodiment of the present invention, and it can be confirmed that it is 8770 lux. In this way, by forming the light-guiding pattern portion (130) on the surface of the base film (110), the light-emitting sheet (100) can uniformly guide light generated from a separate external light source, thereby improving the uniformity of brightness and illuminance. This provides the advantage of improving the illuminance by ensuring uniform light-guiding performance not only from the front but also from various angles or in environments with poor illuminance, including in the dark at night.

[0034] In addition, according to another embodiment of the present invention, the light-emitting sheet (100) can be used for purposes such as advertising and guidance without the help of a professional through an easy and simple process of cutting out letters and shapes that the user wants to express and attaching them to a transparent panel such as acrylic.

[0035] FIG. 4a and FIG. 4b are images showing the results of a comparison test of the illuminance of a light-emitting sheet (100) expressing cut-out characters according to another embodiment of the present invention.

[0036] Fig. 4a shows the result of measuring the illuminance of a light-emitting sheet to which a previously developed pattern was applied and characters were expressed, and shows 6150 lux. Similarly, Fig. 4b shows the result of measuring the illuminance of a light-emitting sheet (100) according to an embodiment of the present invention to which characters were expressed, and shows 7770 lux. The test was conducted using an acrylic specification of 590x300x5 (unit: mm), LED lighting of 5630 white, and the LED irradiation direction was 300 mm 2-sided irradiation. Similar to the result of Fig. 3, it can be confirmed that the light-emitting sheet (100) according to an embodiment of the present invention to which characters were expressed shows higher illuminance compared to the light-emitting sheet to which the previously developed pattern was applied. Therefore, by using the light-emitting sheet (100) according to an embodiment of the present invention, it is possible to easily and conveniently produce advertisements and guide signs with improved readability according to the user's purpose.

[0037] FIG. 2 is an image showing a road sign (200) according to another embodiment of the present invention.

[0038] Referring to FIG. 2, the road sign (200) includes a light-emitting sheet (100) of the present invention described above, a plate member (210) made of a composite plate to support the light-emitting sheet (100) from the rear side of the light-emitting sheet (100), a frame bottom plate (220) formed along the edge of the plate member (210), a lighting member (230) including at least one modular LED to provide light at the lower end of the light-emitting sheet (100), a first reflective sheet (240) formed on the front side of the light-emitting sheet (100) to improve the brightness of the light source, a frame top plate (250) formed along the edge so as to be formed in front of the first reflective sheet (240) and be aligned with the frame bottom plate (220), and a second reflective sheet (260) formed at the frontmost side to improve the brightness of the light source, thereby improving the visibility of road information to a driver. At this time, the light-emitting sheet (100) can be combined with a separate light guide plate to form the road sign (200), the frame bottom plate (220) is custom-fitted to be embedded in the rear of the frame top plate (250), and the lighting member (230) can be subjected to epoxy waterproofing processing.

[0039] In addition, the first reflective sheet (240) can be combined with a separate light-diffusing polycarbonate to form the road sign (200), and the second reflective sheet (260) can be combined with a separate composite plate to form the road sign (200), and includes sign information (261) indicating road information on the front. At this time, the light-emitting sheet (100), the first reflective sheet (240), and the second reflective sheet (260) are manufactured to match the shape of the sign information (261) to be expressed. In this way, by using the road sign (200) with improved visibility by applying the light-emitting sheet (100), there is an advantage in that the driver can more clearly recognize the road information even in situations where the driver's ability to discern is reduced, such as when driving at night or in bad weather conditions such as heavy rain, heavy snow, and fog.

[0040] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will readily appreciate that the present invention can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single entity may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined manner.

[0041] The scope of the present invention is indicated by the claims set forth below, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

Claims

1. In a luminescent sheet with excellent light-guiding performance, The above luminescent sheet, Base film; and It is composed of a light-guiding pattern portion repeatedly formed in a pattern set on the surface of the above base film; The above light guide pattern part is, Characterized by having a hexagonal shape, Luminescent sheet.

2. In paragraph 1, The above light guide pattern part is, a circular pattern center consisting of at least one dot positioned in the center; and A triangle pattern characterized by having a triangle that is bisected by an imaginary line passing from the center of the pattern center in the 1 o'clock, 3 o'clock, 5 o'clock, 7 o'clock, 9 o'clock and 11 o'clock directions, and has symmetrical left and right sides. Luminescent sheet.

3. In paragraph 1, The above light guide pattern part is, characterized by forming a corner pattern, which is a fan-shaped shape of the same size that fills the inside of each corner; Luminescent sheet.

4. In paragraph 2, The above triangle pattern is, Each corner may be formed in a rounded and / or pointed shape, and each triangle is characterized by being formed in the same size. Luminescent sheet.

5. In paragraph 1, The above light guide pattern part is, It is characterized in that it is printed on the base film with a luminescent ink containing an adhesive and has adhesive properties. Luminescent sheet.

6. In paragraph 1, The above base film is, It can be made of multiple layers, and is characterized by the fact that each layer can have different materials. Luminescent sheet.

7. A luminescent sheet according to any one of claims 1 to 6; A plate member made of a composite plate to support the light-emitting sheet on the back of the light-emitting sheet; A frame floor plate formed along the edge of the above plate member; A lighting member providing light, including at least one modular LED at the bottom of the above-mentioned light-emitting sheet; A first reflective sheet formed on the front surface of the above-mentioned light-emitting sheet to improve the brightness of the light source; A frame top plate formed along the edge so as to be formed in front of the first reflective sheet and be aligned with the frame bottom plate; and A second reflective sheet formed at the front to improve the brightness of the light source; characterized in that it improves the driver's visibility of road information. road sign.

8. In paragraph 7, The above luminescent sheet, Characterized in that it can be combined with a separate light guide plate to form the above road sign. road sign.

9. In paragraph 7, The above first reflective sheet, Characterized in that it can be combined with a separate light-diffusing polycarbonate to form the above road sign. road sign.

10. In paragraph 7, The above second reflective sheet, The above road sign can be formed by combining it with a separate composite plate, Characterized in that it includes sign information indicating road information on the front; road sign.