KR101154441B1 - Signpost device for being fixed to guard rail for curved road using solsr cell - Google Patents

Abstract

PURPOSE: A signpost attached on a guardrail for a curved road using a solar cell is provided to enable a driver to easily and accurately recognize the sign post at a remote distance through LEDs or EL sheets. CONSTITUTION: A signpost attached on a guardrail for a curved road using a solar cell comprises a power supply unit(20), a sensor unit, and a sign unit. The power supply unit is integrally attached on a guardrail and supplies power to the sensor unit. The sensor unit is attached on the guardrail and is electrically connected to the power supply unit. And the sensor unit senses whether a vehicle enters a road. The sign unit is attached on the guardrail and has a first sign unit(30) and a second sign unit. The first sign unit indicates the traveling direction of a vehicle. When the entry of the vehicle is sensed, the second sign unit displays a danger warning signal.

Description

SIGNPOST DEVICE FOR BEING FIXED TO GUARD RAIL FOR CURVED ROAD USING SOLSR CELL}

One embodiment of the present invention relates to a display device with a guardrail mounted on a curved road using a solar cell.

Automobiles are becoming an essential household item in modern life, and traffic accidents are increasing with the increase of automobiles. The main cause of traffic accidents is often caused by the driver's inadequate knowledge of the terrain, and especially when the driver is driving in an unfamiliar area, the driver may not be aware of the sharp curve ahead and may leave the road due to speeding. Happens a lot. Many road safety indicators are installed to prevent drivers from being aware of road conditions on such steep curves in advance.

In general, the road safety indicator installed along one side of the road to display the curve of the road is fixed to the upper side of the support by attaching a chevron (カ) reflector to a rectangular metal plate to install the lights of the vehicle By alerting the driver on the curb road, the driver is prepared to prepare for the sharp curve in advance so as to prevent the vehicle from leaving the road.

The sign using the conventional reflector is exposed to the outside, and as time passes, smoke or dust generated from the vehicle accumulates on the reflector surface and does not effectively reflect the lights of the driving vehicle. It is not possible to properly perform the problem, the surface of the reflector is cracked or easily damaged by the ultraviolet rays, the problem arises that periodically repair and replace the reflector. In addition, road safety signs fixed to curves are installed so that the headlights are reflected to the driver when the vehicle is driving at night, and the reflection of the light is clearly recognized only when the vehicle is approaching the sign. This leads to a problem.

In order to solve this problem, safety signs using LEDs with excellent light emission have been developed so that road signs can be clearly recognized by a night driver at a long distance. Signs using LED are superior in light emission compared to signs using reflective paper, so they can be recognized from a long distance and have a long service life.

However, since LED signs require separate power supply from the outside to emit LEDs, it is difficult to supply power in mountainous areas with many curve roads. There is a problem that the power consumption increases because it continues to emit light regardless.

One embodiment of the present invention is installed on the curve road of the mountain area, which is not easy to manage, it is possible to reduce the power consumption by not requiring a separate power source from the outside using a solar cell, and furthermore, using LED or EL sheet Therefore, the present invention provides a guardrail-attached display device on a curve road using a solar cell having excellent recognition for a driver.

In addition, an embodiment of the present invention by installing a vehicle driving sensor to the guardrail to install a flashing light that is only turned on when the vehicle passes so that the driver can learn all the information such as direction and danger warning at a time Provided is a guardrail mounted display device on a curved road using a solar cell.

In addition, an embodiment of the present invention by attaching a variety of information to the flashing light to the high-luminance light reflector to produce, the guardrail attached to the curve road using a solar cell that can be easily identified by the driver even during the daytime and night It provides a display device.

According to an exemplary embodiment of the present invention, a display device with a guardrail mounted on a curved road using a solar cell is provided on a guard rail provided on both sides of a curved road of a road to display a guardrail using a solar cell for guiding driving of a vehicle. An apparatus comprising: a power supply unit installed separately from the guard rail or integrally attached to the guard rail to supply power; A sensor unit attached to the guard rail and configured to be electrically connected to the power supply unit and detecting whether the vehicle enters the road; And a first display unit which is attached to the guard rail so as to be inward with respect to the road and is electrically connected to the power supply unit, and when the entry of the vehicle is detected by the sensor unit and the first display unit which indicates the driving direction of the vehicle. A display unit having a second display unit for displaying a hazard warning signal toward the road, wherein the power supply unit includes a power supply unit including a rechargeable battery charged with a voltage from a solar cell; A display driving control unit including a first driving control unit and a second driving control unit for controlling driving of the first display unit and the second display unit; And a switching control unit provided between the power supply unit and the display driving control unit to automatically release the connection between the power supply unit and the display driving control unit, wherein the switching control unit electrically connects the power supply unit to the display driving control unit. Switch to connect or disconnect with; A charging unit charged by a voltage applied to both ends of the switch; A solenoid operated by power charged in the charging unit; And a controller configured to turn off the switch by operating the solenoid after a preset reference time since the switch is turned on.

The display device may further include a flashing light attached to the guard rail to be spaced apart from the display unit, and configured to be turned on toward the road by the second driving control unit when the entry of the vehicle is detected by the sensor unit.

The flashing light has a case in which an LED or EL element is installed therein, and a part of an outer surface of the case is attached with a light emitting reflector indicating a traveling direction or a speed limit of the vehicle.

Fluorescent materials are coated on the first display unit and the second display unit.

The control unit may include a storage unit storing the reference time, a sensing unit sensing a state of the switch, a first resistor connected in series to the switch, a second resistor and a third resistor connected in parallel to the switch, The capacitor further includes a capacitor connected in parallel to the third resistor, wherein the sensing unit senses a voltage of the capacitor to sense a state of the switch.

According to an exemplary embodiment of the present invention, a display device with a guardrail mounted on a curved road using a solar cell is installed on a curved road in a mountainous region which is not easy to manage, and requires a separate power source from the outside using a solar cell. Therefore, it is possible to reduce power consumption, and furthermore, by using an LED or an EL element, it is possible to provide a device that is well known to the driver.

In addition, an embodiment of the present invention by installing a vehicle driving sensor to the guardrail to install a flashing light that is only turned on when the vehicle passes so that the driver can learn all the information such as direction and danger warning at a time do.

In addition, an embodiment of the present invention by attaching a variety of information to the flashing light of the high-luminance light reflector produced, there is an effect that can be easily identified by the driver at night and at night.

1 is a view showing a guardrail-attached display device on a curved road using a solar cell according to an embodiment of the present invention.
FIG. 2 is a view illustrating a guard rail-mounted display device installed on a curved road using a solar cell according to an exemplary embodiment of the present invention.
FIG. 3 is a block diagram schematically illustrating an operation of a guardrail-attached display device on a curved road using a solar cell according to an exemplary embodiment of the present invention.
4 is a block diagram illustrating the switch control device of FIG. 3.
5A to 5C are views schematically illustrating a control method of a control unit of the switch control device of FIG. 4.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

1 is a view showing a guardrail-attached display device on a curve road using a solar cell according to an embodiment of the present invention, Figure 2 is a guard on a curve road using a solar cell according to an embodiment of the present invention FIG. 3 is a diagram illustrating a state where a rail-mounted display device is installed. FIG. 3 is a block diagram briefly illustrating an operation of a guardrail-mounted display device on a curved road using a solar cell according to an exemplary embodiment of the present invention.

1 to 3, a guardrail-attached display device on a curved road using a solar cell according to an exemplary embodiment of the present invention is a guard rail fixedly installed at a support P on both sides of a curved road of a road ( A device provided in R) for guiding driving of a vehicle, the apparatus includes a power supply unit 20, a sensor unit 37, and display units 30 and 34. In FIG. 1, the guardrail R has a wavy shape as an example, but the shape of the guardrail R is not limited in the present invention.

The power supply unit 20 is installed separately from or integrally formed with the guard rail R to supply power to the sensor unit 37 and the display units 30 and 34.

More specifically, the power supply unit 20 includes a power supply unit 222, a display driving control unit 220 and a switching control unit 100. That is, the power supply unit 20 includes a power supply unit 222, a display driving control unit 220, and a housing 22 provided with a switching control unit 100 is installed on one side of the edge of the road sensor unit 37 and The display unit 30 and 34 are electrically connected to each other via the conductive wire L to supply power. On the other hand, the power supply unit 20 may further include a communication unit 221 that can communicate with an external server and the like by transmitting and receiving a radio signal of a small power by a predetermined protocol. The power supply unit 222, the display driving control unit 220, and the switching control unit 100 provided in the enclosure 22 may be formed of a printed circuit board.

The power supply unit 222 includes a rechargeable battery in which a voltage is charged from the solar cell 21. The solar cell 21 refers to a solar cell panel including a plurality of solar cells that generate power according to the amount of incident light. That is, the solar cell 21 has a solar cell panel installed at a relatively high position where sunlight is incident well to generate power supplied to the display units 30 and 34 serving as light emitting means. The solar cell 21 charges power to the rechargeable battery using light from the sun during the day, and supplies power to the display units 30 and 34 through the rechargeable battery only when it is detected that the vehicle passes by the sensor unit 37 at night. By supplying, the degradation of durability and power consumption due to unnecessary lighting can be prevented. In addition, the power supply unit 222 may further include a commercial power supply unit that receives a separate power supply from the outside by connecting a separate power source to blink the display unit (30, 34). Therefore, in the present invention, when it is difficult to connect a power source from the outside, such as a mountainous region, a rechargeable battery or a commercial power supply unit charged from the solar cell 21 may be selectively used. 1 to 3, the solar cell 21 is illustrated as being separately installed from the guard rail R. However, the solar cell 21 is not limited thereto and is integrally attached to one side of the guard rail R. It can be configured as.

The display driving controller 220 may include a first drive controller 220a and a second drive controller 220b for controlling the driving of the first display unit 30 and the second display unit 34 that constitute the display units 30 and 34. It is provided. That is, the first drive controller 220a may display the traveling direction of the vehicle through the first display unit 30, and the second drive controller 220b may display the vehicle through the second display unit 34. Information such as the danger warning can be displayed.

The switching controller 100 is provided between the power supply unit 222 and the display driving controller 220 to automatically release the connection therebetween after a set reference time elapses.

The switching controller 100 may include a switch 110 for electrically connecting or releasing the connection between the power supply unit 222 and the display driving controller 220 and a voltage applied to both ends of the switch 110. When the charging unit 130 to be charged, the solenoid 140 operating with the power charged in the charging unit 130, and the preset reference time passes after the switch 110 is turned on, the solenoid 140 is operated. Control unit 150 to turn off the switch 110.

The structure and function of the switching controller 100 will be described in more detail with reference to FIGS. 4 to 5C.

The sensor unit 37 is attached to the guard rail (R) is formed to be electrically connected to the power supply unit 20, and detects whether the vehicle enters the road. The sensor unit 37 is composed of a sensor for detecting a moving object, such a sensor may be an infrared sensor, an object sensor and a loop sensor. Therefore, in the present invention, an expensive sensor for detecting a vehicle will not necessarily be used.

The display units 30 and 34 are attached to the guard rail R so as to be inward with respect to the road and are electrically connected to the power supply unit 20. That is, the display units 30 and 34 are coupled to the guard rail R through the respective first fastening means 33a and 33b at the corners and the upper and lower portions of the first display panel 31. In addition, the display units 30 and 34 display a danger alarm signal toward the road when the vehicle is detected by the first display unit 30 and the sensor unit 37 which display the traveling direction of the vehicle. The second display unit 34 is provided. The first display unit 30 is a plate-shaped first display panel 31 is fixed to the guard rail (R) through the first fastening means (33a, 33b) LED (Light Emitting Diode) or EL (Electro Luminescence) The elements may be used to indicate the traveling direction 32 of the vehicle. Here, the traveling direction 32 of the vehicle is arranged in a continuous manner (eg, "<<" or spaced apart by a certain distance toward the left or right of the chevron shape of "<" or ">" in order to indicate in the direction toward the driver ">>"), but the present invention is not limited to the shape in the above direction. In the second display unit 34, a plate-shaped second display panel 35 is attached to the guard rail R to display the danger alarm signal 36 using LEDs or EL elements. The dangerous alarm signal 36 flashes a vehicle-shaped display unit to warn the driver of a situation such as when a vehicle opposite the road enters, a sharp curve road, or an accident-prone area. In addition, the first display unit 30 and the second display unit 34 include a plurality of LEDs or EL elements in the case. The first display unit 30 and the second display unit 34 configured as described above may be configured in plural numbers, and when the vehicle proceeds or the vehicle enters from the opposite side, the first display unit 30 and the second display unit 34 may be sequentially formed in the direction of entry of the vehicle opposite to the traveling direction of the vehicle. Alternate flashing can increase awareness to the driver.

Meanwhile, the first display unit 30 and the second display unit 34 may be coated with a fluorescent material on the outside of the case to emit light of various colors and to clearly recognize the driver even from a long distance.

In addition, the display device attached to the guardrail on the curve road using the solar cell according to the present invention is attached to the guard rail (R) so as to be spaced apart from the display unit (30, 34), by the sensor unit 37 When the entrance of the vehicle is sensed further comprises a flashing light 40 to be turned on by the second drive control unit 220b toward the road. The flashing light 40 has a case in which an LED or an EL element is installed therein, and a part of the outer surface of the case 41 is attached to a high brightness light emitting reflector indicating a traveling direction or a speed limit of the vehicle. The flashing light 40 is installed through the second fastening means 44a fixedly coupled to the guard rail R through the coupling table 44, the coupling table 44, and the guard rail R. Therefore, in the present invention, when the entry of the vehicle is detected by the sensor unit 37, the vehicle of the lane on the opposite side through the second display unit 34 and the flashing light 40 by the second drive control unit 220b. The driver can be more aware of the danger warning signs, such as entering, sudden curves, or multi-regional accidents, so that the driver can acquire all information such as driving directions and danger warnings at once.

4 is a block diagram illustrating the switch control device of FIG. 3, and FIGS. 5A to 5C are views schematically illustrating a control method of a control unit of the switch control device of FIG. 4.

Referring to FIG. 4, the switch control device 100 of the display device with a guardrail on a curved road using a solar cell according to an embodiment of the present invention includes a switch 110, a rectifier circuit 120, and a charging unit 130. ), The solenoid 140 and the controller 150. In addition, the switch control device 100 according to an embodiment of the present invention, the first diode (D1), the second diode (D2), the third diode (D3), the first resistor (R1), the second resistor (R2). ), The third resistor (R3) and the capacitor (C) further. In this case, the switch 110 connects or releases the power supply unit 222 to the display driving control unit 220 (hereinafter, referred to as a load unit A).

The power supply unit 222 serves to supply power to the load unit (A). The power supply unit 222 may use a power source of a rechargeable battery charged by a solar cell or a commercial AC power of a general 220V.

The load unit A operates by receiving power from the power supply unit 222. In addition, the load unit A has a relatively small resistance value compared to the first resistor R1 connected in series. Therefore, when the switch 110 is in the off state, a minute leakage current may flow in the load unit A. FIG. Here, the charging unit 130 may be charged by the leakage current flowing in the load unit A, and the leakage current is a minimum current capable of charging the charging unit 130.

The switch 110 is located between the power supply unit 222 and the load unit A, and serves to electrically connect or disconnect the connection between the power supply unit 222 and the load unit A. That is, when the switch 110 is turned on, the power supply unit 222 and the load unit A are electrically connected so that the load unit A operates.

On the contrary, when the switch 110 is turned off, the power supply unit 222 and the load unit A are disconnected and the load unit A does not operate. In this case, when the switch 110 is turned off, a voltage difference occurs between both ends of the switch 110. The switch 110 may be turned on by the user, and may be turned off by the solenoid 140. For example, the switch 110 is turned on by the user and the lamp is turned on. After the set reference time, the switch 110 is turned off by the solenoid 140 so that the lamp is turned off. The switch 110 is a device capable of manually turning on / off between the power supply unit 222 and the load unit (A). In other words, referring to FIGS. 5A to 5C, the switch 110 is normally kept off by an elastic body (not shown) such as a spring, and the switch 110 latches when the user turns on the switch 110. It keeps the state which caught on the 111. Thus, the switch 110 does not consume current to maintain the on or off state. In addition, the latch 110 is released by the solenoid 140 after the set reference time elapses to be in the off state again. The switch 110 may maintain a state of being latched to the latch 111, and the latch 111 may be released and maintained in an off state by an elastic body (not shown). Here, although the latch 111 is schematically illustrated in FIGS. 5A to 5C, the latch may be implemented in any form as long as the latch 110 can be held by the switch 110.

The rectifier circuit 120 is electrically connected to the switch 110.

When the switch 110 is turned off, the rectifier circuit 120 rectifies the leakage current flowing through the load unit A to provide the charging unit 130. Here, the first resistor R1 and the first diode D1 are connected in series between the switch 110 and the rectifier circuit 120. In addition, a second diode D2, a second resistor R2, and a third resistor R3 are connected in parallel between the first resistor R1 and the first diode D1. Therefore, the voltage divided by the first resistor R1, the second diode D2, the second resistor R2, and the third resistor R3 is applied to the rectifier circuit 120. Here, the first diode D1 and the second diode D2 prevent current from flowing in the opposite direction. That is, the first diode D1 and the second diode D2 prevent the power of the charging unit 130 charged through the rectifier circuit 120 from flowing to the load A. In addition, a third diode D3 is connected between the third resistor R3 and the switch 110, and the third diode D3 prevents the power of the power supply unit 222 from flowing to the controller 150. .

The charging unit 130 is electrically connected to the rectifier circuit 120.

In addition, when the switch 110 is turned off, the charging unit 130 is charged by a voltage applied to both ends of the switch 110. In other words, since the leakage current flows in the load unit A when the switch 110 is in the off state, the charging unit 150 is charged using the leakage current flowing in the load unit A. FIG. At this time, the leakage current is rectified through the rectifier circuit 120 is charged to the charging unit 130. In addition, even if the charging unit 130 is charged with a leakage current flowing through the load unit A, the load unit A has no effect. As such, the charging unit 130 is not charged with a separate power source, but is charged with a voltage applied to both ends of the switch 110 when the switch 110 is turned off. Therefore, the switch control device 100 according to the present invention can reduce the cost. In addition, the voltage charged in the charging unit 130 is used to release the latch 111 of the switch 110 by operating the solenoid 140. The charging unit 130 may be a secondary battery or an electric double layer capacitor (EDLC) capable of charging and discharging, but the type is not limited thereto.

The solenoid 140 operates by power charged in the charging unit 130 to serve to turn off the switch 110. 5A to 5C, the solenoid 140 is formed of a central rod 141 and a coil 142 surrounding the central rod 141 in a cylindrical shape. In the solenoid 140, when a current flows through the coil 142, a magnetic field having a uniform size is formed inside the coil 142, and the central rod 141 moves. In addition, the solenoid 140, if no current flows in the coil 142, the center rod 141 is returned to its original state. As shown in FIG. 5A, when the switch 110 is in an on state, a current iL flows to the load unit A through the switch 110 to operate the load unit A. Referring to FIG. At this time, no current flows through the solenoid 140. Then, as shown in Figure 5b, after the set reference time passes the current (iS) flows in the coil 142 of the solenoid 140, the center rod 141 is moved to release the latch 111, switch 140 Is turned off. In this case, the solenoid 140 operates with power charged in the charging unit 130. As shown in FIG. 5C, the solenoid 140 returns to its original state after turning off the switch 110. Even when the solenoid 140 is returned to its original state, the switch 110 continues to be turned off by the elastic body. That is, the switch 110 is kept turned off unless the latch 110 is turned on by the user. The solenoid 140 may also operate by a minute current, generally referred to as a solenoid valve.

The controller 150 charges the charging unit 130 and controls the solenoid 140 using the voltage charged in the charging unit 130. The controller 150 includes a sensing unit 151 and a storage unit 152. The sensing unit 151 is electrically connected between the second resistor R2 and the third resistor R3, and the capacitor C is connected in parallel to the third resistor R3. The sensing unit 151 senses a voltage of the capacitor C, and detects a state of the switch 110, that is, on / off of the switch 110. Here, a capacitor C is connected in parallel to the third resistor R3. For example, when the switch 110 is in the on state, since no current flows through the second diode D2, the charge charged in the capacitor C is discharged through the third resistor R3. Therefore, the sensing unit 151 detects that the voltage of the capacitor C is falling and recognizes that the switch 110 is in an on state. On the contrary, when the switch 110 is in the off state, since current flows through the second diode D2, the capacitor C is charged. Accordingly, the sensing unit 151 may detect that the voltage of the capacitor C is rising to recognize that the switch 110 is in an off state. The storage unit 152 stores a reference time set by the user. The reference time may be changed according to the place or space where the switch 110 is used.

Looking at the operation method of the controller 150 as follows. The controller 150 checks the state of the switch 110 through the sensing unit 151. In this case, when the switch 110 is in an off state, the controller 150 charges the charging unit 130. Here, when the charging voltage of the charging unit 130 reaches a reference voltage for operating the solenoid 140, the controller 150 may stop charging of the charging unit 130. In addition, the controller 150 confirms that the switch 110 is changed from the off state to the on state by the sensing unit 151, and then, when the reference time stored in the storage unit 152 elapses, the controller 130 is charged in the charging unit 130. The solenoid 140 is operated using the voltage. When the solenoid 140 operates, the switch 110 is turned off. Here, the solenoid 140 may turn off the switch 110 by the current flow through the coil 142 by the center rod 141 releases the latch 111.

The center rod 141 releases the latch 111 and then returns to its original state.

That is, the controller 150 charges the voltage to the charging unit 130 when the switch 110 is turned off, and operates the solenoid 140 when the set reference time elapses after the switch 110 is turned on. Turn off (110). Therefore, the switch 110 is automatically turned off after the set reference time by the controller 150.

As such, the switch control device 100 according to the present invention includes a control unit 150 for turning off the switch 110 after a set reference time elapses, and automatically switches the switch 110 even if the user does not turn off the switch 110. By turning off, the power can be prevented from being wasted.

In addition, the switch control device 100 according to the present invention by charging the charging unit 130 with a voltage applied to both ends of the switch 110 when the switch 110 is off, a separate power source for charging the charging unit 130 You do not need this. Accordingly, the switch control device 100 according to the present invention can reduce the cost.

What has been described above is only one embodiment for implementing a guardrail-mounted display device on a curved road using a solar cell according to the present invention, and the present invention is not limited to the above embodiment, and the claims As claimed in the present invention without departing from the gist of the present invention, any person having ordinary knowledge in the field of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

20: power supply 21: solar cell
22: enclosure 30: first display unit
31: first display panel 32: direction of travel
33a, 33b: first fastening means 34: second display portion
35: second display panel 36: danger alarm signal
37: sensor portion 40: flashing light
41: Case 42: Direction of travel
43: light emitting reflector 44: coupling table
44a: second fastening means 100: switch control unit
220: display drive control unit 221: communication unit
222: power supply

Claims (5)

In the guardrail display device using a solar cell provided on the guard rail (R) provided on both sides of the curve of the road to guide the running of the vehicle,
A power supply unit 20 installed separately from the guard rail R or attached integrally to supply power;
A sensor unit 37 attached to the guard rail R to be electrically connected to the power supply unit 20 and detecting whether the vehicle enters the road; And
The first display unit 30 and the sensor unit 37 are attached to the guard rail R so as to be inward with respect to the road, and are electrically connected to the power supply unit 20, and indicate a traveling direction of the vehicle. Including the display unit 30, 34 having a second display unit 34 for displaying a danger alarm signal toward the road when the entry of the vehicle is detected by,
The power supply unit 20
A power supply unit 222 having a rechargeable battery in which a voltage is charged from the solar cell 21;
A display driving controller 220 including a first driving controller 220a and a second driving controller 220b for controlling driving of the first display unit 30 and the second display unit 34; And
And a switching control unit 100 provided between the power supply unit 222 and the display driving control unit 220 to automatically release the connection therebetween after a set reference time elapses.
The switching control unit 100,
A switch 110 for electrically connecting or releasing the connection between the power supply unit 222 and the display driving control unit 220;
A charging unit 130 charged by a voltage applied to both ends of the switch 110;
A solenoid 140 operating with power charged in the charging unit 130; And
Curve after using a solar cell, characterized in that it comprises a control unit 150 for turning off the switch 110 by operating the solenoid 140 when a preset reference time after the switch 110 is turned on Guardrail attached display on the road. The method of claim 1,
It is attached to the guard rail (R) so as to be spaced apart from the display unit (30, 34), when the entry of the vehicle by the sensor unit 37 is detected by the second drive control unit 220b toward the road A guardrail-attached display device on a curved road using a solar cell, characterized in that it further comprises a flashing light (40) to be turned on. The method of claim 2,
The flashing light 40 includes a case in which an LED or an EL element is installed therein, and a part of the outer surface of the case 41 is attached to a light emitting reflector indicating a traveling direction or a speed limit of the vehicle. A display device with a guardrail on a curved road using batteries. The method of claim 1,
A display device with a guardrail on a curved path using a solar cell, wherein the first display part 30 and the second display part 34 are coated with a fluorescent material. The method of claim 1,
The controller 150 may include a storage unit 152 storing the reference time, a sensing unit 151 detecting a state of the switch, a first resistor R1 connected in series to the switch 110, Further comprising a second resistor (R2) and a third resistor (R3) connected in parallel to the switch 110, and a capacitor (C) connected in parallel to the third resistor (R3),
The sensing unit 151 detects the voltage of the capacitor (C) to detect the state of the switch 110, the guardrail-attached display device on a curve road using a solar cell.

Images