WO2019182381A1

WO2019182381A1 - Side lighting-type indicator

Info

Publication number: WO2019182381A1
Application number: PCT/KR2019/003313
Authority: WO
Inventors: 이기훈; 조성수
Original assignee: 주식회사 에이엘테크
Priority date: 2018-03-23
Filing date: 2019-03-21
Publication date: 2019-09-26
Also published as: KR20190111468A

Abstract

A side lighting-type indicator of the present invention comprises: an outer periphery frame including an accommodation space and having an open top; a transparent front panel for covering the upper part of the outer periphery frame, and extending in a first direction and a second direction vertical to the first direction; light sources positioned in the accommodation space and arranged in the second direction; and a lens positioned in the first direction from at least one of the light sources, wherein the lens comprises at least two convex lenses arranged in a third direction that is vertical with respect to the first direction and the second direction.

Description

Side illuminated signs

The present invention relates to a side illuminated marker device.

In general, all roads such as city roads, national roads, and highways are equipped with road signs and guide signs that allow drivers to recognize the direction of travel. It is convenient for driving to the destination.

Road signs and guide signs are various signs that guide drivers to their destinations and also for road safety. Specific forms and specifications have been determined by laws, such as caution signs, regulatory signs, indicator signs, and supplementary signs. It is installed on sidewalks as well as on roads so that pedestrians can recognize the direction they want to proceed conveniently and easily.

Such a sign is provided with a reflector on which retroreflection is made on a plate formed of an iron plate or the like, thereby reflecting light from a vehicle to provide information to a driver or the like.

However, since the reflection performance is significantly reduced in dew condensation of the sign due to atmospheric pressure, rainy weather, at night, etc., road signs using the reflector do not provide sufficient safety information to the driver and thus increase the risk of an accident.

Furthermore, if the reflective life of the reflective paper is shorter than the expected life, then the risk of accidents increases considerably if the reflective function cannot be performed perfectly. Reflective paper is exposed to ultraviolet rays, which degrades its durability and significantly reduces its reflection performance.

In particular, in a dangerous area such as a sharp curve of the road section, if the road sign does not perform its original function, it is often the case of death. In such cases, the state may also be held liable to accident victims or insurance companies.

In order to solve these problems, Patent Document 1 discloses a "LED internally illuminated road sign." Since the internally illuminated signs use their own light sources, they have better visibility than signs with reflective paper.

However, conventional internally illuminated signs have a disadvantage in that the weight of the product is increased and manufacturing cost is increased by using a light guide plate, and the light emitted from the LED light source is scattered as it enters the light guide plate, thereby lowering efficiency.

(Patent Document 1) Korean Patent Publication No. 10-1077921 (2011.10.24.)

The technical problem to be solved is improved luminance uniformity, improved luminance efficiency compared to power consumption, and the use of a light guide plate may be excluded according to the embodiment, which is a side lighting type that can reduce the cost and lighten the product It is to provide a label device.

According to one or more exemplary embodiments, there is provided a side lighting display device including: an outer frame including an accommodation space and having an open upper portion; A front panel covering an upper portion of the outer frame and extending in a first direction and a second direction perpendicular to the first direction; Light sources positioned in the accommodation space and arranged in the second direction; And a lens located in the first direction from at least one of the light sources, the lens including at least two convex lenses arranged in a third direction perpendicular to the first direction and the second direction.

The side lighting display device may further include a light guide plate extending in the first direction and the second direction and positioned on the same plane as the light sources and the lens.

The light guide plate may include light scattering patterns arranged in the first direction and the second direction, and the light scattering patterns may increase in density as the light scattering patterns move away from the light sources in the first direction.

The lens may include sub-lenses respectively corresponding to the light sources, and each of the sub-lenses may include the at least two convex lenses.

The lens may extend in the second direction corresponding to the arrangement of the light sources.

The at least two convex lenses may include an upper convex lens and a lower convex lens, and the upper convex lens and the lower convex lens may have different inclination angles with respect to the third direction.

The upper convex lens may have a larger upper inclination angle than the lower inclination angle with respect to the third direction, and the lower convex lens may have a smaller upper inclination angle than the lower inclination angle with respect to the third direction.

According to another embodiment of the present invention, there is provided a side-illuminated labeling apparatus including an outer frame including an accommodation space and an upper portion thereof open; A transparent front panel covering an upper portion of the outer frame and extending in a first direction and a second direction perpendicular to the first direction; Light sources positioned in the accommodation space and arranged in the second direction; And a reflecting member positioned in a direction opposite to the first direction from at least one of the light sources, wherein the reflecting member has a lower tip positioned relative to the first direction and a third direction perpendicular to the second direction And a central tip, and an upper tip, wherein the lower tip, the middle tip, and the upper tip protrude in the first direction.

The side lighting label device may further include a light guide plate extending in the first direction and the second direction and positioned on the same plane as the light sources and the reflective member.

The reflective member may include sub-reflective members corresponding to the light sources, respectively, and the sub-reflective members may most protrude at positions of the light sources corresponding to the second direction.

The reflective member may extend in the second direction corresponding to the arrangement of the light sources.

The central tip may protrude further in the first direction than the lower tip and the upper tip.

An upper recess is located between the middle tip and the upper tip, the thinnest portion of the upper recess is located closer to the upper tip than the middle tip, and a lower recess is located between the middle tip and the lower tip. The thinnest portion of the lower recess may be located closer to the lower tip than the middle tip.

The front panel may be transparent, and the bottom surface of the front panel may be roughened.

The front panel is transparent and the bottom surface of the front panel may be anti-reflection coated.

The side lighting marker device according to the present invention can improve the luminance uniformity, improve the luminance efficiency compared to the power consumption, and also eliminate the use of a light guide plate according to the embodiment, thereby reducing the cost and lightening the product. .

1 is a view for explaining the appearance of the side-lit labeling device according to an embodiment of the present invention.

2 is a view for explaining a side-illuminating marker device according to a first embodiment of the present invention.

3 is a view for explaining the lens of the side-illuminating labeling apparatus according to the first embodiment of the present invention.

4 and 5 are views for explaining a case in which the lens of the side-lit label apparatus according to the first embodiment of the present invention is configured in different embodiments.

6 is a view for explaining a side-illuminating marker device according to a second embodiment of the present invention.

7 is a view for explaining the lens of the side-illuminating labeling apparatus according to the second embodiment of the present invention.

8 and 9 are views for explaining a case in which the lens of the side-lit label apparatus according to the second embodiment of the present invention is configured in different embodiments.

FIG. 10 is a view for explaining a side lighting marker device according to a third embodiment of the present invention.

11 is a view for explaining a reflection member of the side-illumination indicator device according to a third embodiment of the present invention.

12 and 13 are views for explaining a case in which the reflection members of the side-lit label device according to the third embodiment of the present invention are configured in different embodiments.

14 is a view for explaining a side-illuminating marker device according to a fourth embodiment of the present invention.

15 is a view for explaining a reflective member of the side-illuminating label device according to a fourth embodiment of the present invention.

16 and 17 are views for explaining a case in which the reflection members of the side-lit labeling device according to the fourth embodiment of the present invention are configured in different embodiments.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification. Therefore, the aforementioned reference numerals may be used in other drawings.

In addition, 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. In the drawings, the thicknesses may be exaggerated for clarity.

1 is a view for explaining the appearance of the side-lit indicator device according to an embodiment of the present invention, Figure 2 is a view for explaining a side-lit indicator device according to a first embodiment of the present invention, Figure 3 It is a view for explaining the lens of the side-lit labeling apparatus according to the first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the side illuminated label device 10 of FIG. 1 taken through a cutting line A-A 'to explain the side illuminated label device 10a according to the first embodiment of the present invention.

The side illuminated label apparatus 10a according to the first embodiment of the present invention includes an outer frame 100, a front panel 200, a transmissive retroreflective sheet 210, a cover sheet 220, a light guide plate 300, and a reflective sheet. 400, a circuit board CB1, light sources LA1, and a lens LS1.

The outer frame 100 may include an accommodation space and an upper portion thereof may be opened. For example, the outer frame 100 may include a lower plate extending in the first direction DR1 and the second direction DR2 in the planar direction and sidewalls extending in the third direction DR3 in the vertical direction. The outer frame 100 may be made of a metal material or the like so as not to transmit light except for the open upper portion. The first direction DR1, the second direction DR2, and the third direction DR3 may be perpendicular to each other.

The front panel 200 covers an upper portion of the outer frame 100 and may extend in the first direction DR1 and the second direction DR2. For example, the front panel 200 may be made of a transparent material to transmit light.

The transmissive retroreflective sheet 210 may be located above the front panel 200. If the conventional retroreflective sheet is used only for external light reflection, the transmissive retroreflective sheet 210 may perform a function of transmitting internal light and reflecting external light. For example, a conventional retroreflective sheet may be a prism sheet in which threads are arranged in a planar direction, and these threads serve to reflect external light. The transmissive retroreflective sheet 210 according to an embodiment of the present invention includes a threaded region including threads and a planar region without threads, thereby reflecting external light through the threaded region and transmitting internal light through the planar region. You can.

The cover sheet 220 may be positioned above the transmissive retroreflective sheet 210. Referring to FIG. 1, the cover sheet 220 may be a color sheet in which patterns, figures, numbers, letters, and the like for being recognized by an external observer such as a driver are represented.

The reflective sheet 400 may be positioned on the lower plate of the outer frame 100 and may reflect internal light directed downward. In FIG. 2, the reflective sheet 400 is shown only on the bottom plate of the outer frame 100, but in other embodiments the reflective sheet 400 may be further located on the sidewall of the outer frame 100.

The light sources LA1 may be positioned in the accommodation space of the outer frame 100 and arranged in the second direction DR2 (see FIGS. 4 and 5). The light sources LA1 may be electrically connected to the circuit board CB1. The circuit board CB1 may be located at a side surface of the etching portion formed by etching a portion of the light guide plate 300. Therefore, the light sources LA1 may be arranged such that the light output front direction becomes the first direction DR1. In another embodiment, when the light guide plate 300 does not include an etching portion, the circuit board CB1 may be located on the sidewall of the outer frame 100. The light sources LA1 may be light emitting diodes (LEDs), for example, devices that can emit light.

The light guide plate 300 may extend in the first direction DR1 and the second direction DR2 and may be positioned on the same plane as the light sources LA1 and the lens LS1. The light guide plate 300 may function to allow the internal light emitted from the light sources LA1 positioned on one side of the side surface indicator device 10a to uniformly reach the other side.

The light guide plate 300 may include light scattering patterns 301 arranged in a first direction DR1 and a second direction DR2. The light scattering patterns 301 may increase in density as the light scattering patterns 301 move away from the light sources LA1 in the first direction DR1. The dense light scattering patterns 301 may be configured to reduce the loss due to the reflection of light on the opposite sidewall of the outer frame 100. In this case, the opposite sidewall refers to a sidewall positioned in the first direction DR1 from the sidewall of the outer frame 100 where the light sources LA1 are located. The light scattering patterns 301 may be a pattern such as a V-CUT processed in the light guide plate 300 itself. In another embodiment, the light scattering patterns 301 may be a pattern processed outside of the light guide plate 300 by a printing method.

The lens LS1 is positioned in the first direction DR1 from at least one of the light sources LA1. The lens LS1 may be spaced apart from the light sources LA1 in the first direction DR1 according to a focal length according to a product specification. Referring to FIG. 3, the lens LS1 includes at least two convex lenses UL1 and LL1 arranged in the third direction DR3. Here, the convex lens may mean a single-sided convex lens, not a double-sided convex lens. The convex lenses UL1 and LL1 may have surfaces that are convex in the first direction DR1 and may have surfaces that are flat in the direction opposite to the first direction DR1.

In the present embodiment, the two convex lenses UL1 and LL1 may have the same inclination angles aLL1, aLU1, aUL1, and aUU1 with respect to the third direction DR3.

The lens LS1 condenses the light passing through the upper and lower portions near the inclination angles aUU1 and aLL1 toward the center to induce total reflection in the light guide plate 300. The conventional side-lit indicator device without the lens LS1 has a problem that an LED hot spot occurs due to internal light that is not totally reflected from the light guide plate, and this embodiment can solve this problem.

In addition, the lens LS1 may disperse the light passing through the middle portion near the inclination angles aLU1 and aUL1 in the vertical direction to prevent the light from directly reaching and reflecting on the opposite sidewall of the outer frame 100. The structure of the lens LS1 may generate synergy with the light scattering patterns 301 to reduce light loss due to reflection.

FIG. 4 shows the side illuminated marker device 10a along the cutting line B1-B1 ′ of FIG. 2.

Referring to FIG. 4, the lens LS1 includes sub-lenses corresponding to the light sources LA1 and LB1 respectively, and each sub-lens includes at least two convex lenses UL1 and LL1 described above. can do.

The sub-lens may function as a dedicated lens for the corresponding light source. The sub-lens may focus the light spreading in the lateral direction (second direction DR2) to the center. For example, when the thickness of the light guide plate 300 is thin, the number of total reflection and scattering is relatively large, so that the amount of light from the light sources LA1 and LB1 to the opposite sidewall becomes small, so that the sub-lens is used to reinforce such light amount. Can be. Thereby, thickness reduction of the side illumination label apparatus 10a is attained.

FIG. 5 shows the side illuminated marker device 10a 'along the cutting line B1-B1' of FIG.

Referring to FIG. 5, the lens LS1 ′ may extend in the second direction DR2 corresponding to the arrangement of the light sources LA1 and LB1. That is, the lens LS1 ′ may not be a dedicated lens for a specific light source but may be a common lens for all light sources LA1 and LB1. For example, when the thickness of the light guide plate 300 is sufficiently thick, the total reflection and scattering times are relatively small, and the amount of light from the light sources LA1 and LB1 to the opposite sidewall is sufficient, so that a dedicated lens may be unnecessary. When the lens LS1 'is formed of a common lens, the construction cost is relatively low, and the efficiency for assembly work is also high. For example, since the lens LS1 ′ may be manufactured by an extrusion method, manufacturing cost may be reduced.

4 and 5, according to an embodiment, the light sources LA1 and LB1 may include first light sources LA1 and second light sources LB1. For example, first light sources LA1 may be a first group of light sources connected in parallel between the first power source and the ground power source. The second light sources LB1 may be light sources of a second group connected in parallel between the second power source and the ground power source. The first power source and the second power source are independent of each other, and the first power source and the second power source may be higher voltage power sources than the ground power source.

As described above, when the light sources are electrically separated into two or more groups, it is possible to cope with various situations.

For example, assume that each of the first light sources LA1 is driven at a brightness of 100 and each of the second light sources LB1 is driven at a brightness of 100. Therefore, in general, the LED chip composed of one first light source LA1 and one second light source LB1 may emit light with a luminance of 200.

If one of the first light sources LA1 fails, the LED chip including the failed first light source emits light at 100 luminance, and the normal LED chip emits light at 200 luminance, so that a luminance difference of 100 occurs. do.

In this case, a driving method of reducing the individual luminances of the first light sources LA1 from 100 to 50 and raising the individual luminances of the second light sources LB1 from 100 to 150 may be applied. At this time, the faulty LED chip emits light with a brightness of 150, and the remaining normal LED chips emit light with a brightness of 200. At this time, since the luminance difference between the normal LED chip and the faulty LED chip is 50, the luminance uniformity can be improved as compared with the case where the driving method is not applied.

2, 4, and 5 illustrate embodiments in which paired first and second light sources are arranged in a second direction DR2. In another embodiment, the paired first and second light sources may be arranged in a third direction DR3.

FIG. 6 is a view for explaining a side illuminated label device according to a second embodiment of the present invention, and FIG. 7 is a view for explaining a lens of a side illuminated label device according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of the side illuminated label device 10 of FIG. 1 cut through a cutting line A-A ', and illustrates a side illuminated label device 10b according to a second embodiment of the present invention. .

Hereinafter, the side lighted labeling device 10b of the second embodiment will be described based on the difference from the side lighted labeling device 10a of the first embodiment, and a description of overlapping components will be omitted.

The side illuminated label device 10b of the second embodiment does not include a light guide plate. In this case, the circuit board CB2 in which the light sources LA2 are positioned may be located on the sidewall of the outer frame 100.

In the absence of the light guide plate, the total reflection condition is not necessary, and the curvature of the lens LS2 may be designed such that the amount of light reached per unit area of the front panel 200 or the transmissive retroreflective sheet 210 is the same. By excluding the light guide plate, the product weight of the side-illuminated labeling device 10b becomes lighter and thinner.

7 shows an example of the configuration of the lens LS2. Referring to FIG. 7, the lens LS2 of the side-lit label device 10b may include an upper convex lens UL2 and a lower convex lens LL2. In this case, the inclination angles of the upper convex lens UL2 and the lower convex lens LL2 may be different from each other based on the third direction DR3.

In detail, the upper convex lens UL2 may have a larger upper inclination angle aUU2 than the lower inclination angle aUL2 based on the third direction DR3. The lower convex lens LL2 may have a smaller upper inclination angle aLU2 than the lower inclination angle aLL2 based on the third direction DR3.

In other words, the upper convex lens UL2 may be designed to have a lower upper radius of curvature than the lower radius of curvature based on the third direction DR3. In addition, the lower convex lens LL2 may be designed to have a larger upper radius of curvature than a lower radius of curvature based on the third direction DR3.

The lens LS2 may be designed to be concave so that the middle portion may disperse the emitted light in the light source front direction up and down based on the third direction DR3.

In one embodiment, the front panel 200 is transparent and the bottom surface of the front panel 200 may be roughened. When the bottom surface of the front panel 200 is roughly processed, the light scattering occurrence rate may be increased as compared with the smooth case, thereby increasing the light transmittance. In another embodiment, the front panel 200 is transparent and the bottom surface of the front panel 200 may be anti-reflection coating. That is, unlike the first embodiment, the lower surface of the front panel 200 may be configured differently in order to suppress reflection and increase light transmittance in the second embodiment.

FIG. 8 shows the side illuminated marker device 10b along the cutting line B2-B2 'of FIG.

Referring to FIG. 8, the lens LS2 includes sub-lenses corresponding to the light sources LA2 and LB2, respectively, and each sub-lens includes at least two convex lenses UL2 and LL2 described above. can do.

FIG. 9 shows the side illuminated marker device 10b 'along the cutting line B2-B2' of FIG.

Referring to FIG. 5, the lens LS2 ′ may extend in the second direction DR2 corresponding to the arrangement of the light sources LA2 and LB2. That is, the lens LS2 ′ may not be a dedicated lens for a specific light source but may be a common lens for all light sources LA2 and LB2.

Since the effects of the embodiments of FIGS. 8 and 9 are similar to those of FIGS. 4 and 5, redundant descriptions thereof will be omitted.

FIG. 10 is a view for explaining a side illuminated label device according to a third embodiment of the present invention, and FIG. 11 is a view for explaining a reflection member of the side illuminated label device according to a third embodiment of the present invention.

FIG. 10 is a cross-sectional view of the side illuminated label device 10 of FIG. 1 cut through a cutting line A-A ', to illustrate the side illuminated label device 10c according to the third embodiment of the present invention.

The side illuminated label device 10c according to the third embodiment of the present invention includes an outer frame 100, a front panel 200, a transmissive retroreflective sheet 210, a cover sheet 220, a light guide plate 300, and a reflective sheet. 400, the circuit board CB3, the light sources LA3, and the reflective member LS3 may be included.

Hereinafter, the circuit board CB3, the light sources LA3, and the reflective member LS3, which are distinguished from the first embodiment, will be described, and a description of the overlapped configuration with the first embodiment will be omitted.

The light sources LA3 may be positioned in the accommodation space of the outer frame 100 and arranged in the second direction DR2 (see FIGS. 12 and 13). The light sources LA3 may be electrically connected to the circuit board CB3. The circuit board CB3 may be located on the side of the etching portion formed by etching a portion of the light guide plate 300. Therefore, the light sources LA3 may be arranged such that the light output front direction is opposite to the first direction DR1. In another embodiment, when the light guide plate 300 does not include an etched portion, the light guide plate 300 may have a smaller planar area than that of FIG. 10, and may be disposed between the side surface of the light guide plate 300 and the sidewall of the outer frame 100. You can create a space spacing. The circuit board CB3 may be attached to the side surface of the light guide plate 300 in such a space.

The reflective member LS3 may be located in a direction opposite to the first direction DR1 from at least one of the light sources LA3. The reflective member LS3 may be positioned on an opposite side of the etching portion of the light guide plate 300. The opposite side of the etched portion refers to the side of the etched portion facing the side of the etched portion where the circuit board CB3 is located. In another embodiment, when the light guide plate 300 does not include an etching portion, the reflective member LS3 may be attached to the sidewall of the outer frame 100 in the above-described space.

Referring to FIG. 11, the reflective member LS3 may include a lower tip LT3, a middle tip CT3, and an upper tip UT3 positioned based on the third direction DR3. The lower tip LT3, the middle tip CT3, and the upper tip UT3 may protrude in the first direction DR1. The upper recess UCC3 may be positioned between the middle tip CT3 and the upper tip UT3, and the lower recess LCC3 may be positioned between the middle tip CT3 and the lower tip LT3.

The upper tip UT3 and the lower tip LT3 may reflect light emitted from the light sources LA3 toward the center of the light guide plate 300. The central tip CT3 may be dispersed in the upper and lower portions of the light guide plate 300 so that the light emitted from the front of the light sources LA3 does not face the light sources LA3 again. Therefore, when the inclination angle of the reflective member LS3 is appropriately adjusted according to the product, it is possible to satisfy the total reflection condition for the light guide plate 300 and to minimize the light hit by the light sources LA3. In addition, the reflective member LS3 may perform the diffuser plate function to more efficiently remove the afterimage of the LED.

The circuit board CB3 may be made of a transparent material of the substrate and the electrode so that light can pass therethrough.

FIG. 12 shows the side illuminated marker device 10c along the cutting line B3-B3 'of FIG.

Referring to FIG. 12, the reflective member LS3 may include sub-reflective members corresponding to the light sources LA3 and LB3, respectively. In this case, each of the sub-reflective members may protrude most at the position of the corresponding light source with respect to the second direction DR2. In other words, each of the sub-reflective members may be triangular, at the observer's point of view in FIG. 12. Therefore, the reflected light may not be directed toward the light sources LA3 and LB3 in the lateral direction, thereby minimizing light loss.

FIG. 13 shows the side illuminated marker device 10c 'along the cutting line B3-B3' of FIG.

Referring to FIG. 13, the reflective member LS3 ′ may extend in the second direction DR2 corresponding to the arrangement of the light sources LA3 and LB3. That is, the reflective member LS3 ′ may not be a dedicated reflective member for a specific light source but may be a common reflective member for all the light sources LA3 and LB3. When the reflective member LS3 'is commonly configured, the configuration cost is relatively low, and the efficiency for assembly work is also high. For example, since the reflective member LS3 'may be manufactured by an extrusion method, manufacturing cost may be reduced.

12 and 13, the configuration and effects of dividing the light sources LA3 and LB3 into a plurality of groups will be described with reference to FIGS. 4 and 5.

FIG. 14 is a view for explaining a side lighting label device according to a fourth embodiment of the present invention, and FIG. 15 is a view for explaining a reflection member of the side lighting label device according to a fourth embodiment of the present invention.

The side illuminated label device 10d of the fourth embodiment does not include the light guide plate 300 as compared to the side illuminated label device 10c of the third embodiment. In this case, the reflective member LS4 may be positioned on the sidewall of the outer frame 100, and the circuit board CB4 and the light sources LA4 may be properly spaced apart to face the reflective member LS4. . Description of other redundant configurations will be omitted.

In the absence of the light guide plate 300, the total reflection condition is not necessary, and the curvature of the reflective member LS4 may be designed such that the amount of light reached per unit area of the front panel 200 or the transmissive retroreflective sheet 210 is the same. have. By excluding the light guide plate, the side-illuminated labeling device 10d can be thinned.

Referring to FIG. 15, the reflective member LS4 may include a lower tip LT4, a middle tip CT4, and an upper tip UT4 positioned based on the third direction DR3. The lower tip LT4, the middle tip CT4, and the upper tip UT4 may protrude in the first direction DR1. The upper recess UCC4 may be positioned between the middle tip CT4 and the upper tip UT4, and the lower recess LCC4 may be positioned between the middle tip CT4 and the lower tip LT4.

In the present embodiment, the middle tip CT4 may further protrude in the first direction DR1 as compared to the lower tip LT4 and the upper tip UT4. In addition, the thinnest portion of the upper recess UCC4 may be located closer to the upper tip UT4 than the middle tip CT4, and the thinnest portion of the lower recess LCC4 is the middle tip CT4. It may be located closer to the lower tip (LT4) than.

In one embodiment, the front panel 200 is transparent and the bottom surface of the front panel 200 may be roughened. When the bottom surface of the front panel 200 is roughly processed, the light scattering occurrence rate may be increased as compared with the smooth case, thereby increasing the light transmittance. In another embodiment, the front panel 200 is transparent and the bottom surface of the front panel 200 may be antireflective coated. In other words, unlike the third embodiment, the lower surface of the front panel 200 may be configured differently in order to suppress reflection and increase light transmittance in the fourth embodiment.

FIG. 16 shows the side illuminated marker device 10d along the cutting line B4-B4 'of FIG.

Referring to FIG. 16, the reflective member LS4 may include sub-reflective members corresponding to the light sources LA4 and LB4, respectively. In this case, each of the sub-reflective members may protrude most at the position of the corresponding light source with respect to the second direction DR2. In other words, each of the sub-reflective members may be triangular, at the observer's point of view in FIG. 12. Therefore, the reflected light may not be directed toward the light sources LA3 and LB3 in the lateral direction, thereby minimizing light loss.

FIG. 17 shows the side illuminated marker device 10d 'along the cutting line B4-B4' of FIG.

Referring to FIG. 17, the reflective member LS4 ′ may extend in the second direction DR2 corresponding to the arrangement of the light sources LA4 and LB4. That is, the reflective member LS4 ′ may not be a dedicated reflective member for a specific light source but may be a common reflective member for all the light sources LA4 and LB4. When the reflective member LS4 'is commonly configured, the configuration cost is relatively low, and the efficiency for assembly work is also high. For example, since the reflective member LS4 'can be manufactured by an extrusion method, manufacturing cost can be reduced.

16 and 17, the configuration and effects of dividing the light sources LA4 and LB4 into a plurality of groups will be described with reference to FIGS. 4 and 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the invention described with reference to the drawings referred to heretofore is merely exemplary of the invention, which has been used only for the purpose of illustrating the invention and is used to limit the scope of the invention as defined in the meaning or claims. It is not. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

An outer frame including an accommodation space and having an open top;

A front panel covering an upper portion of the outer frame and extending in a first direction and a second direction perpendicular to the first direction;

Light sources positioned in the accommodation space and arranged in the second direction; And

A lens located in the first direction from at least one of the light sources,

The lens comprises at least two convex lenses arranged in a third direction perpendicular to the first direction and the second direction,

Side illuminated signs.
The method of claim 1,

And a light guide plate extending in the first direction and the second direction and positioned on the same plane as the light sources and the lens.

Side illuminated signs.
The method of claim 2,

The light guide plate includes light scattering patterns arranged in the first direction and the second direction.

The light scattering patterns increase in density as the light scattering patterns move away from the light sources in the first direction.

Side illuminated signs.
The method of claim 3, wherein

The lens comprises sub-lenses respectively corresponding to the light sources,

Each of said sub-lenses comprises said at least two convex lenses,

Side illuminated signs.
The method of claim 3, wherein

The lens extends in the second direction corresponding to the arrangement of the light sources;

Side illuminated signs.
The method of claim 1,

The at least two convex lenses comprises an upper convex lens and a lower convex lens,

The upper convex lens and the lower convex lens have different inclination angles with respect to the third direction,

Side illuminated signs.
The method of claim 6,

The upper convex lens has a larger upper inclination angle than a lower inclination angle with respect to the third direction,

The lower convex lens has an upper inclination angle smaller than a lower inclination angle with respect to the third direction,

Side illuminated signs.
The method of claim 7, wherein

The lens comprises sub-lenses respectively corresponding to the light sources,

Each of said sub-lenses comprises said at least two convex lenses,

Side illuminated signs.
The method of claim 7, wherein

The lens extends in the second direction corresponding to the arrangement of the light sources;

Side illuminated signs.
An outer frame including an accommodation space and having an open top;

A transparent front panel covering an upper portion of the outer frame and extending in a first direction and a second direction perpendicular to the first direction;

Light sources positioned in the accommodation space and arranged in the second direction; And

A reflection member located in a direction opposite to the first direction from at least one of the light sources,

The reflective member includes a lower tip, a middle tip, and an upper tip positioned with respect to a third direction perpendicular to the first direction and the second direction,

The lower tip, the middle tip, and the upper tip protrude in the first direction,

Side illuminated signs.
The method of claim 10,

And a light guide plate extending in the first direction and the second direction and positioned on the same plane as the light sources and the reflective member.

Side illuminated signs.
The method of claim 11, wherein

The light guide plate includes light scattering patterns arranged in the first direction and the second direction.

The light scattering patterns increase in density as the light scattering patterns move away from the light sources in the first direction.

Side illuminated signs.
The method of claim 12,

The reflecting member includes sub-reflective members corresponding to the light sources, respectively,

The sub-reflective members protrude most at the position of the corresponding light source relative to the second direction,

Side illuminated signs.
The method of claim 12,

The reflecting member extends in the second direction corresponding to the arrangement of the light sources;

Side illuminated signs.
The method of claim 10,

The central tip is more protruding in the first direction than the lower tip and the upper tip,

Side illuminated signs.
The method of claim 15,

An upper recess is located between the middle tip and the upper tip,

The thinnest portion of the upper recess is located closer to the upper tip than the middle tip,

A lower recess is located between the middle tip and the lower tip,

The thinnest portion of the lower recess is located closer to the lower tip than the middle tip,

Side illuminated signs.
The method of claim 16,

The reflecting member includes sub-reflective members corresponding to the light sources, respectively,

The sub-reflective members protrude most at the position of the corresponding light source relative to the second direction,

Side illuminated signs.
The method of claim 16,

The reflecting member extends in the second direction corresponding to the arrangement of the light sources;

Side illuminated signs.
The method according to any one of claims 6 and 15,

The front panel is transparent,

The bottom surface of the front panel is roughened,

Side illuminated signs.
The method according to any one of claims 6 and 15,

The front panel is transparent,

The lower surface of the front panel is anti-reflection coated,

Side illuminated signs.