KR101036657B1 - A bidirectional LED signal lamp of cross walk - Google Patents

A bidirectional LED signal lamp of cross walk Download PDF

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Publication number
KR101036657B1
KR101036657B1 KR1020090022123A KR20090022123A KR101036657B1 KR 101036657 B1 KR101036657 B1 KR 101036657B1 KR 1020090022123 A KR1020090022123 A KR 1020090022123A KR 20090022123 A KR20090022123 A KR 20090022123A KR 101036657 B1 KR101036657 B1 KR 101036657B1
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KR
South Korea
Prior art keywords
light
led
diffusion plate
light diffusion
disposed
Prior art date
Application number
KR1020090022123A
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Korean (ko)
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KR20100104002A (en
Inventor
김인언
Original Assignee
김인언
엘이디에이 주식회사
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Priority to KR1020090022123A priority Critical patent/KR101036657B1/en
Publication of KR20100104002A publication Critical patent/KR20100104002A/en
Application granted granted Critical
Publication of KR101036657B1 publication Critical patent/KR101036657B1/en

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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/095Traffic lights
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00Protecting lighting devices from damage
    • F21V15/01Housings, e.g. material or assembling of housing parts
    • F21V15/015Devices for covering joints between adjacent lighting devices; End coverings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources

Abstract

The present invention relates to a pedestrian traffic light using an LED, and more particularly, to a two-way display traffic light that displays a signal to a pedestrian not only in the front but also in the rear by using a light diffusion plate. Grooves for inserting the LED is formed along the light diffusion plate for absorbing the light of the point light source emitted from the LED from the side to emit the front and rear with the light of the surface light source; A plurality of LEDs disposed on a printed circuit board, the LED module being disposed to insert the LEDs along the outer side grooves of the light diffusion plate; A heat dissipation plate disposed to be in contact with an outer surface of the light diffusion plate while surrounding the LED module to emit heat generated from the LED to the outside; And a case for protecting the light diffusion plate and the LED module from an external environment.
Since the light of the LED light source passes through the inside of the light diffusion plate and is converted to a surface light source by the above configuration, the signal is displayed in front and rear of the traffic light to further ensure safety. It can solve the problem of glare and concealment of damaged LED.
LED, traffic light, bidirectional, light diffuser, heat sink

Description

A bidirectional LED signal lamp of cross walk}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to pedestrian traffic lights using LEDs, and more particularly, to two-way display traffic lights that display signals for pedestrians not only in the front but also in the rear using a light diffusion plate.

Pedestrian traffic lights are installed on both sidewalks of pedestrian crossings to check the green and red status of traffic lights on the other side of the pedestrian crossing.

The pedestrian traffic light stops the car going straight when the signal of the car traffic light for the straight car is red, and at the same time the pedestrian traffic light turns green so that the pedestrian crosses the crosswalk. That is, the pedestrian waiting to cross the pedestrian crossing observes the lighting color of the traffic light installed on the opposite side of the road and moves according to the change of the opposite traffic light.

As shown in FIG. 1, a general structure of a walking signal lamp according to the related art is provided with one post 20 on the ground at a position facing each other on both sides of a pedestrian crossing and a red (above) at the top of the post 20. The two-color traffic lights 10a) and green 10b are arranged up and down so that they alternately flash at programmed time intervals.

As shown in (a) of FIG. 2, a specific configuration of such a walking signal light is generally arranged at regular intervals with incandescent bulbs or a plurality of light emitting diodes (hereinafter, referred to as “LEDs”) at the front, and external power supply. The LED array substrate 2 is connected to the means to apply power to the LED 1 to generate light, and the LED array substrate 2 is coupled to have a predetermined distance in front of the LED array substrate 2 to emit light of the LED 1. A protective lens 3 of transparent or translucent material that radiates to the outside is fastened to the case 4 and configured. Here, the LED 1 emitting red or green light may be used for displaying a signal, or the protective lens 3 may include red or green phosphors, and the protective lens 3 may be guided such as a stop or a progress. This can be engraved.

Pedestrian traffic light 10 according to the prior art is configured to be seen only opposite the crosswalk. However, as the road widens in recent years, the distance between traffic lights on both sides of pedestrian crossings is also widening, and due to the complexity of sidewalks, it is difficult for pedestrians to wait for traffic at the back of traffic lights, so it is difficult to keep an eye on the opposite traffic lights. .

In addition, since the light emitted from the LED (1) is emitted to the outside as it is through the lens 3, the straightness is so high that pedestrians can easily feel fatigue, because the light emission of the individual LED (1) is exposed to the outside as it is When some of the individual LED (1) is damaged there is a problem that the damaged LED (1) appears as a black spot when viewed from the outside front (front).

The pedestrian traffic light according to the prior art is configured to display a signal only in the opposite direction of the crosswalk, so that a pedestrian located behind the traffic light or a pedestrian approaching the crosswalk may have difficulty in recognizing the signal. This is directly emitted, you can easily feel fatigue, there was a problem that is exposed to the outside as a black spot when the individual LED damage.

The present invention has been proposed to solve the above problems, the LED is located on the side of the light diffusion plate such as diffused acrylic is configured to emit light through the light diffusion plate, thereby displaying a signal in front as well as in the rear The purpose of the present invention is to provide a two-way indicating signal light using LEDs to prevent such damage from appearing externally even if individual LEDs are damaged.

The present invention for achieving the above object is a walking signal light using a light emitting diode (hereinafter referred to as 'LED'), a groove for inserting the LED is formed along the outer surface, the point light source radiated from the LED Light diffusion plate for absorbing the light from the side to emit the front and rear light of the surface light source; A plurality of LEDs disposed on a printed circuit board, the LED module being disposed to insert the LEDs along the outer side grooves of the light diffusion plate; A heat dissipation plate disposed to be in contact with an outer surface of the light diffusion plate while surrounding the LED module to emit heat generated from the LED to the outside; And a case for protecting the light diffusion plate and the LED module from an external environment.

In the above configuration, the case is characterized in that the flange is formed to protrude inclined forward and rearward from the lower side to the upper side along the edge.

In the above configuration, the case is characterized in that a plurality of through-holes are formed so that the heat of the heat sink is efficiently discharged to the outside along the portion where the heat sink is disposed.

The present invention having the above configuration displays the signal not only in front but also in the rear, so as to easily recognize the signal to the pedestrian behind the traffic light, since the light of the LED is incident on the side of the light diffusion plate and exited as a surface light source, Even if the individual LEDs are damaged, such damage does not appear externally, thus protecting the aesthetics.

The technical problem achieved by the present invention and the practice of the present invention will be more clearly understood by preferred embodiments of the present invention described below. The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a bottom perspective view showing a walking signal light according to an embodiment of the present invention, Figures 4 and 5 is a side cross-sectional view showing a walking signal light of one side according to an embodiment of the present invention, Figures 6 and 7 of the present invention Front sectional drawing which shows the walking traffic light of one side in accordance with an Example.

Referring to FIG. 3, a walking signal light 10 using an LED according to an embodiment of the present invention includes a light diffusion plate 100 using diffusion acrylic and an LED disposed on an outer circumferential surface of the light diffusion plate 100 as a light source (FIG. 4, 210, and a heat sink (300 in FIG. 4) for dissipating heat generated from the LED 210 to the outside, and a case 400 for protecting them from the external environment.

Hereinafter, a detailed configuration of a bidirectional walking signal light using an LED according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 4 to 7.

4 to 7, the bidirectional display walking signal light 10 according to an exemplary embodiment of the present invention includes a light diffusion plate 100 that absorbs light of an LED point light source and converts it into a surface light source, and a plurality of LEDs ( LED module 200 and 210, a heat sink 300 for dissipating heat generated from the LED, and the light diffusion plate 100, LED module 200, for protecting the heat sink 300 It is composed of a case 400.

Specifically, the above-described light diffusion plate 100 is configured to convert the light of the point light source by the LED into the surface light source. That is, the light diffusing plate 100 is a light guide plate that is converted into a surface light source by the total reflection, scattering and refraction as the light of the point light source incident from one side passes through the inside and is emitted to the front and the rear (Light Guide) As a configuration to perform the Pannel) function, a diffusion acrylic of a transparent or translucent material having a predetermined thickness may be used, and the outer circumferential surface may be formed in various shapes such as a circle or a square.

The light diffusion plate 100 is formed with an insertion groove 110 that can be coupled to the LED module 200 to be described later along the outer surface.

As shown in FIG. 6, the plurality of insertion grooves 110 may be separately formed so that each of the plurality of LEDs 210 may be inserted, or may be generally formed along the outer surface of the light diffusion plate 100 as illustrated in FIG. 7. It can be formed to be connected. In addition, the cross section may be formed in a quadrangular shape, but in order to prevent a hot line or a hot spot caused by the corner of the quadrangle, a rounded shape as shown in FIGS. 3 and 4 is formed. It is preferably formed in a round or oval shape.

And the light diffusion plate 100 is composed of a diffusion acrylic containing a red or green phosphor to add a red and green signal, or a separate red or green film is further provided on one side of the transparent diffusion acrylic Or it may be composed of LEDs that emit red and green light by the LEDs themselves. In addition, the diffusion acrylic or film is formed to represent a figure or stop or walk is configured to indicate whether or not to proceed to the pedestrian. Here, the pattern may be formed of a letter as well as a figure.

The above-described LED module 200 is configured to perform a light source function in the bi-directional walking signal light 10, and in particular, LEDs have low power consumption, long life, and eco-friendliness. It is widely used as a light source.

The LED module 200 has a plurality of LEDs 210 are disposed along a printed circuit board (PCB) printed with conductive conductive lines for supplying power to each LED 210 to control light emission. In the printed circuit board 220 according to the embodiment of the present invention, a band-shaped PCB or an FPCB is used so that the printed circuit board 220 may be banded along the outer surface of the light diffusion plate 100.

A plurality of LEDs 210 are attached to one surface of the printed circuit board 220, and the LEDs 210 are inserted along the insertion groove 110 of the light diffusion plate 100 together with the printed circuit board 220. Thus, the light of the point light source is emitted toward the light diffusion plate 100.

Meanwhile, as illustrated in FIG. 5, the light diffusion plate 100 may have two rows of insertion grooves 110. In this case, the LEDs 210 attached to the printed circuit board 220 may also be arranged in two rows. In this case, the illuminance of the traffic light 10 can be improved, and the number of LED arrays can be properly adjusted according to the illuminance required at the position where the traffic light 10 is installed.

In addition, although not shown, the printed circuit board 220 is connected to an external control unit for controlling the lighting of the signal lamp 10.

  When the plurality of LEDs 210 emit light, the above-described heat sink 300 generates heat from the LEDs 210 itself. The heat sink 300 absorbs such heat and quickly releases them to the outside to prevent malfunction or damage due to overheating. As such, a metal material having excellent thermal conductivity such as aluminum may be used.

The heat sink 300 is formed in a band shape to improve the heat dissipation effect, as shown in the figure, while contacting the LED module 200 and the light diffusion plate 100 to the outer surface of the light diffusion plate 100 It is preferred to be banded accordingly.

The case 400 is configured to protect the light diffusion plate 100, the LED module 200, and the heat sink 300 from an external environment, and a synthetic resin of plastic or polymer material may be used.

A flange 410 is formed on the front surface of the case 400, and the flange 410 is formed to protrude obliquely from the lower side to the upper side along the edge of the case 400. That is, the upper side is configured to protect the light diffusion plate 100 from rain or snow, and the lower side is configured to ensure a view for the pedestrian. The case 400 and the flange 410 may be formed for each of the traffic lights arranged up and down, or may be formed at the same time by integrating the two traffic lights.

In addition, the case 400 is preferably configured such that a plurality of through holes 420 are formed along the portion where the heat sink 300 is bent so that heat of the heat sink can be easily discharged to the outside.

Bidirectional display walking signal light 10 using the LED according to the embodiment of the present invention as described above is not the LED 210 itself emits light directly to the front of the traffic light, the side of the light diffusion plate 100 Since it is disposed in the light diffuser plate 100 to pass through the inside of the light diffusion plate is configured to be emitted, the signal is displayed both in front and rear of the traffic light can be further ensured safety, and the problem of glare due to straightness and The concealment problem of the damaged LED 210 can be solved.

In particular, the two-way walking signal light according to the embodiment of the present invention, in the road structure of the bus lane only recently, the two-way walking signal light can be more efficiently applied to the sidewalk installed in the center of the road. That is, four traffic lights must be installed so that the pedestrian traffic lights according to the prior art are paired on both sides of the crosswalk in the road structure as described above, but only three traffic lights are installed according to the embodiment of the present invention. There is an advantage that can be.

Although the embodiments of the present invention have been described with reference to the present invention, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

1 is a front view showing a walking traffic light according to the prior art,

2 is a cross-sectional view showing a walking traffic light according to the prior art,

3 is a bottom perspective view showing a walking traffic light according to an embodiment of the present invention,

Figure 4 is a side cross-sectional view showing a walking signal light of one side according to an embodiment of the present invention,

Figure 5 is a side cross-sectional view showing a walking signal light of one side according to another embodiment of the present invention,

Figure 6 is a front sectional view showing a walking signal light of one side according to an embodiment of the present invention,

Figure 7 is a front sectional view showing a walking traffic light of one side according to another embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

100: light diffusion plate

200: LED Module

300: heat sink

400: case

Claims (3)

  1. In a walking signal light using a light emitting diode (hereinafter referred to as 'LED'),
    A light diffusion plate having a groove for inserting the LED along an outer surface thereof, the light diffusion plate for absorbing the light of the point light source emitted from the LED from the side and emitting the light forward and backward to the light of the surface light source;
    A plurality of LEDs disposed on a printed circuit board, the LED module being disposed to insert the LEDs along the outer side grooves of the light diffusion plate;
    A heat dissipation plate disposed to be in contact with an outer surface of the light diffusion plate while surrounding the LED module to emit heat generated from the LED to the outside; And
    Including; case for protecting the light diffusion plate, the LED module from the external environment,
    A bidirectional indicator walking traffic light using the LED, characterized in that configured to display a walking signal to the front and rear.
  2. The method of claim 1,
    The case is a bi-directional walking signal light using the LED, characterized in that the flange is formed to protrude obliquely forward and backward from the lower side to the upper side along the edge.
  3. The method according to claim 1 or 2,
    The case is a bi-directional walking signal light using the LED, characterized in that a plurality of through-holes are formed so that the heat of the heat sink is efficiently discharged to the outside along the portion where the heat sink is disposed.
KR1020090022123A 2009-03-16 2009-03-16 A bidirectional LED signal lamp of cross walk KR101036657B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090022123A KR101036657B1 (en) 2009-03-16 2009-03-16 A bidirectional LED signal lamp of cross walk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090022123A KR101036657B1 (en) 2009-03-16 2009-03-16 A bidirectional LED signal lamp of cross walk

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KR20100104002A KR20100104002A (en) 2010-09-29
KR101036657B1 true KR101036657B1 (en) 2011-05-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030064180A (en) * 2002-01-26 2003-07-31 주식회사 석산터메디칼 A Prescription Creating System And Storage Medium Thereof
KR20040035634A (en) * 2004-04-02 2004-04-29 김동진 Livestock wastewater treatment system attached the biological treatment and a membrane and an electrolysis tank
KR200364180Y1 (en) 2004-07-09 2004-10-08 이상열 Display devise using light emitting diodes
KR20060034676A (en) * 2005-11-10 2006-04-24 오완호 The luminous device using light emitting diodes
KR200435634Y1 (en) 2006-09-30 2007-02-02 (주)엘티비스 LED lighting device including sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030064180A (en) * 2002-01-26 2003-07-31 주식회사 석산터메디칼 A Prescription Creating System And Storage Medium Thereof
KR20040035634A (en) * 2004-04-02 2004-04-29 김동진 Livestock wastewater treatment system attached the biological treatment and a membrane and an electrolysis tank
KR200364180Y1 (en) 2004-07-09 2004-10-08 이상열 Display devise using light emitting diodes
KR20060034676A (en) * 2005-11-10 2006-04-24 오완호 The luminous device using light emitting diodes
KR200435634Y1 (en) 2006-09-30 2007-02-02 (주)엘티비스 LED lighting device including sensor

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