KR102150539B1 - Smart sign board for crosswalk - Google Patents

Abstract

According to one embodiment of the present invention, provide is a self-luminous smart pedestrian crossing sign board, which is installed in the upper air of a pedestrian crossing installed on an arbitrary main lane of an intersection. The smart pedestrian crossing sign board comprises: a main sign disposed toward a driver traveling on the main lane, wherein the main sign includes a sign surface composed of a light-transmitting display region of a predetermined pattern and a retroreflective region around the same; a backlight unit emitting light in a plane direction of the display surface from a portion of the circumference of the rear of the sign surface; a light guide plate illuminating the entire display surface by refracting and scattering light from the backlight unit, wherein a light transmissive space is provided by being interposed between the light guide plate and the display surface to diffuse the light; a light transmitting unit for illuminating the pedestrian crossing; a camera unit photographing the pedestrian crossing; a camera unit photographing the pedestrian crossing; and a control unit controlling the lighting of the backlight unit and the light transmitting unit, analyzing an image photographed by the camera unit to determine a lane entering person waiting for a crossing signal by entering the main lane and a trespasser trespassing the main lane in a crossing stop signal, and controlling the lighting of the backlight unit and the light transmitting unit in a method corresponding to each situation.

Description

SMART SIGN BOARD FOR CROSSWALK}

The present invention relates to a crosswalk sign, and more particularly, to a smart crosswalk sign capable of performing various guidance and functions by determining the state of a pedestrian crossing a road crossing signal and a pedestrian crossing.

Pedestrian crossing is a facility installed so that vehicles or pedestrians can safely use it under legal regulations for the safety of pedestrians by defining a pedestrian area with a certain standard for the safety of pedestrians from accidents caused by various vehicles on the road.

However, accidents on crosswalks are increasing year by year due to rapidly increasing vehicles and poor facilities of crosswalks installed and operated indiscriminately.

Around 210,000 traffic accidents occur every year, killing 320,000 people or injuring them, and the number of walking deaths per 100,000 population also appears to be 3.3. In particular, in the case of children, 44% of the causes of fatal accidents are traffic accidents, and most of these are due to traffic accidents that occurred while walking at crosswalks or nearby.

Looking at the current status of crosswalk accidents compiled by the National Police Agency, it can be seen that 12,488 cases in 2012, 11,775 cases in 2013, 12,142 cases in 2014, and 12,602 cases in 2015, on average, occurred in 12,000 cases. Therefore, there is a need to improve or reinforce the safety signs of crosswalks.

As a prior art of such a crosswalk sign, there is a registered patent No. 10-1783391 (name: illuminated traffic safety sign). In the prior art, the light-type traffic safety that the thickness is thin, manufacture and installation are simple, A/S is easy, cost reduction and manufacturing process are shortened, thereby increasing the production rate and convenient replacement due to damage, etc. In order to provide a sign, the illuminated traffic safety sign: After the reflective sheet, the light guide plate, and the PC plate are sequentially bonded to the inner surface of the extruded frame, the reflective sheet, the light guide plate, and the PC plate float on the embossing of the extruded frame, resulting in condensation. It has an anti-blocking structure, and the channel part is fixed to the extrusion frame by a fixing member to prevent separation after being inserted into the inner groove of the extrusion frame, and waterproof packing to prevent foreign substances such as rain and dust from entering between the panel part and the extrusion frame. It is composed of an installed structure.

In addition, it is possible to inform the driver that the location of pedestrians crossing the road through an illuminated traffic safety sign driven by LEDs, and a pedestrian crossing user or driver can check the pedestrians on the pedestrian crossing through the photographing unit connected to the lower part. In addition, by storing images according to traffic signal cycles as well as regular shooting through the camera unit installed in the photographing unit, it is possible to easily check the images according to the accident time when an intersection incident occurs.

However, since it may not sufficiently attract the attention of the driver even by such an illuminated traffic safety sign of the prior art, a smarter crosswalk sign is required.

Accordingly, the present invention aims to promote the safety of both pedestrians and drivers by pre-detecting various dangerous actions that may occur at the crosswalk by mounting artificial intelligence on the crosswalk sign.

A self-illuminating smart pedestrian crossing sign according to an embodiment of the present invention for achieving the above object is installed in the upper air of a crosswalk installed on an arbitrary main lane of an intersection, as follows: A main sign arranged toward the driver-The main sign is a cover surface composed of a light-transmitting display area of a predetermined pattern and a retroreflective area around it, and emits light from a portion of the circumference of the rear of the cover surface toward the surface of the cover surface. Backlight unit; A light guide plate for illuminating the entire cover surface by refracting and scattering light from the backlight unit, and a light transmitting spacer interposed between the light guide plate and the cover surface to diffuse the light -; A light transmitting part for illuminating the crosswalk; A camera unit for photographing the crosswalk; Controls the lighting of the backlight unit and the light-transmitting unit, analyzes the image captured by the camera unit, and enters the main lane to enter the main lane to wait for a pedestrian signal, and an endless crossing crossing the main lane at the pedestrian stop signal It may be configured with a control unit that determines a ruler and controls lighting of the backlight unit and the light transmitting unit in a manner corresponding to each situation.

In this case, the control unit sets an area corresponding to the crosswalk installed in the main lane within the photographed image as a crosswalk area, and transmits a walking signal while entering the crosswalk area within the main lane during a pedestrian stop signal. Pedestrians waiting, pedestrians waiting for a walking signal while entering the crosswalk area within the main lane while being around a vehicle stopped in the crosswalk area during the pedestrian stop signal, the crossing while the remaining time of the walking signal is insufficient A pedestrian who is stopped or moving in the sidewalk area may be determined as the lane entrant, and a pedestrian who is stopped or moving in the crosswalk area during the pedestrian stop signal may be determined as the unauthorized crossing.

In addition, in another embodiment of the present invention, the self-luminous smart pedestrian crossing sign includes at least one auxiliary signal unit disposed toward a driver of another lane crossing the main lane-the auxiliary signal unit, one side of the main sign Is disposed in, and is capable of emitting light to display a predetermined color or pattern, and a color corresponding to whether or not a walking signal or a walking stop signal of the main lane is detected under the control of the control unit, or whether the vehicle entering the lane or the endless crossing terminal is detected. The auxiliary signal unit further comprises: at least one auxiliary signal unit toward a driver entering the main lane by turning right in a left lane, and a driver entering the main lane by turning left at a right lane. It may include at least one other auxiliary signal unit facing toward.

On the other hand, the backlight unit is configured to selectively emit light in white and any other color, and the color of the backlight unit is determined by the control unit to determine whether a walking signal or a walking stop signal to the main lane, or the traffic entering the lane or the endless crossing It can be selected depending on whether the ruler is detected.

In addition, in another embodiment of the present invention, a self-luminous smart pedestrian crossing sign includes a microphone for collecting ambient sound; A vibration sensor for sensing vibration; It may further include a display unit disposed toward the driver of the main lane to display a predetermined pattern, and in this case, the control unit analyzes the captured image and the collected sound and vibration, and the appearance of obstacles on the main lane and The display unit may be controlled to detect the occurrence of a traffic accident and display a pattern representing the detected situation.

The smart crosswalk sign according to the present invention can detect unauthorized pedestrians through artificial intelligence and prevent unauthorized crossing accidents through lighting warning lights and voice broadcasting. In addition, a warning light is turned on at the same time when the pedestrian crossing signal is signaled to give an alertness to a distant driver, thereby inducing a slow or stop line stop. In addition, since clear visibility without diffuse reflection can be secured even in rainy weather, the driver can accurately recognize the crosswalk 200m ahead. In addition, with the shooting function, the situation around the crosswalk can be captured in real time, analyzed and stored. In addition, the angle of the floodlight can be adjusted to prevent glare from drivers and pedestrians. In addition, dimming of the lighting can be adjusted according to the lighting environment of the place where the crosswalk sign is installed. In addition, since the LED light source illuminates from the side of the crosswalk sign, the thickness of the crosswalk sign can be reduced. In addition, since various functions can be integrated into one integrated facility, it is possible to achieve a remarkable budget reduction. In addition, by applying an ultra-high luminance retroreflective sheet to a crosswalk sign, the luminance displayed during the day and night can be the same even during a power outage, thereby enabling the driver to accurately determine whether a crosswalk exists or not even from a distance.

1 is a view schematically showing the appearance of a self-luminous smart pedestrian crossing sign according to an embodiment of the present invention.
2 is a view for explaining the installation form and operation method of the self-luminous smart pedestrian crossing sign according to the present invention.
3 is a block diagram for explaining the configuration of a self-luminous smart pedestrian crossing sign according to an embodiment of the present invention.
4 is a view showing the configuration of the main sign of the self-luminous smart pedestrian crossing sign according to the present invention.
5 is a view showing an example of the auxiliary signal unit of the self-luminous smart pedestrian crossing sign according to the present invention.

Hereinafter, a preferred embodiment of a self-luminous smart pedestrian crossing sign according to the present invention will be described with reference to the accompanying drawings. For reference, since terms referring to each component of the present invention are exemplarily named in consideration of their functions, the technical content of the present invention should not be predicted and limited by the term itself.

First, the appearance of a smart pedestrian crossing sign according to an embodiment of the present invention will be briefly described with reference to FIG. 1. The smart crosswalk sign (hereinafter referred to as a'crosswalk sign') 100 according to an embodiment of the present invention includes a main sign 210, an auxiliary signal unit 130, a warning light 132, and a display unit 140. ), the light transmitting unit 120 and the camera unit 115 are disposed outside. The smart crosswalk sign 100 of the present invention may be installed in the air above the crosswalk installed in a specific lane (hereinafter, referred to as the main lane) at an intersection where three or more lanes intersect.

The main sign 210 is implemented to display the pattern of a general crosswalk guide sign. In particular, the surface of the main sign 210 according to the present invention is a display area 221 including a shape of a pedestrian and a crosswalk, which is generally white, and a'crosswalk' character, and a retroreflection corresponding to the vicinity thereof, which is generally blue. Includes region 222 (see Fig. 4). The display area 221 may be implemented with a translucent or transparent material capable of transmitting illumination light incident from the rear. The retroreflective region 222 is a name given because it is made of a blue retroreflective material. Meanwhile, in another embodiment, the display area 221 may be implemented with a white retroreflective material, and the retroreflective area 222 may be implemented with a blue translucent or transparent material.

The auxiliary signal unit 130 may be disposed on one side of the upper, lower, left, and right sides of the main sign plate 210, and may include a light emitting means capable of displaying a pattern of specific or various colors. In addition, the auxiliary signal unit 130 may be installed to face a specific direction, or may be configured to display patterns in a plurality of directions. For example, in the drawings, it is illustrated in a configuration that is in the form of a plate and is rotatable toward any direction. Accordingly, the pattern of the auxiliary signal unit 130 can be seen from a direction other than the main lane. However, the shape of the auxiliary signal unit 130 may be variously modified in various configurations, for example, a square pillar shape, a triangular pillar shape, and a circular pillar shape (see FIG. 5).

The auxiliary signal unit 130 may be disposed toward a driver who wants to enter the main lane from the left lane and/or the right lane crossing the main lane including the crossing under the main sign plate 210, for example. .

The warning light 132 is configured to emit warning light of a specific color, and may be installed on one side of the main sign plate 210 in particular in the vicinity of the auxiliary signal unit 130. The warning light 132 may be controlled to light up, for example, when an endless crossing is detected.

The display unit 140 is disposed toward at least a driver of a vehicle traveling on a main lane, and is configured to display a situation/event occurring at a crosswalk and/or an intersection in text, symbols, or colors.

The light-transmitting part 120 is disposed to face a crosswalk underneath and emits, for example, white or yellow light to directly illuminate the crosswalk. The light-transmitting unit 120 may illuminate the crosswalk when a pedestrian signal of a crosswalk, a lane entry or an unauthorized crossing occurs, an obstacle or a traffic accident. Alternatively, the light transmitting unit 120 may always illuminate the crosswalk, and may change the color or blinking of the lighting in the above-described situations.

The camera unit 115 may take a picture of a crosswalk when a pedestrian signal of the crosswalk or a traffic accident occurs. In particular, it is preferable that the camera unit 115 in the present invention always takes a crosswalk.

The captured image is analyzed and processed, waiting for the pedestrian signal to cross the main lane in the sidewalk, which is the outer part of the crosswalk at the time of the pedestrian stop signal, and the pedestrian who normally walks the crosswalk at the time of the pedestrian signal (can be judged as a normal pedestrian). Yes), at the time of the pedestrian stop signal, enter the crosswalk and wait for the pedestrian signal, or cross the main lane through the crosswalk in accordance with the pedestrian signal, but at the point in time when the pedestrian signal ends, complete the crosswalk before the pedestrian signal ends. Pedestrians who are moving with an expectation that they will not be able to escape (such a pedestrian can be judged as a lane entry), crossing through the pedestrian crossing despite the pedestrian stop signal, or entering a pedestrian crossing at the pedestrian signal, but the pedestrian crossing is still a crosswalk It is used to identify pedestrians in (such pedestrians can be judged as trespassing).

In addition, the crosswalk sign 100 can improve the safety of pedestrians by expressing an alarm in various ways according to each of these cases.

Next, with reference to FIG. 2, an installation form and operation method of a self-luminous smart pedestrian crossing sign having such a function will be described. The self-illuminating smart pedestrian crossing sign 100 of the present invention is in the upper air of a pedestrian crossing installed in an arbitrary lane of an intersection where three or more lanes gather, or in the upper air of a pedestrian crossing installed where one lane bends. Can be installed. In the drawing, in a cross-shaped intersection where four lanes gather, the lane facing 6 o'clock is the main lane, and a crosswalk is installed on the main lane, and the traffic lights for vehicles and the self-luminous smart of the present invention are in the air above the crosswalk. A crosswalk sign 100 is installed as an example.

The crosswalk sign 100 is installed toward a vehicle traveling on the main lane in the air so that a vehicle traveling on the main lane can recognize from a distance that a crosswalk is installed. The crosswalk sign 100 is a self-luminous type, and has a long visible distance, and can be clearly identified even when fog, rainfall, snowfall, and fine dust concentration are high.

Meanwhile, in the crosswalk sign 100, the color or brightness of the sign may be changed according to a signal of a pedestrian traffic light installed at the crosswalk.

In addition, the pedestrian crossing sign 100 may include a floodlight 120 capable of brightly illuminating a crosswalk under the crosswalk, and the floodlight 120 is always or when a vehicle entering a lane or an unauthorized crossing occurs, Alternatively, the pedestrian crossing can be illuminated at the time of the walking signal.

In addition, the crosswalk sign 100 includes an auxiliary signal unit 130 for vehicles entering the main lane by turning left at the right lane, and an auxiliary signal unit 130 for vehicles entering the main lane by turning right at the left lane. It can be provided. Accordingly, when the driver of the vehicle turning left or right cannot directly see the pedestrian traffic light due to a large vehicle or road facility, the signal situation of the crosswalk through the auxiliary signal unit 130 of the crosswalk sign 100 and/or Pedestrian situation can be grasped.

In addition, the pedestrian crossing sign 100 may capture a pedestrian crossing with the camera 115 to determine a state of a pedestrian or a parking/stop state of the vehicle, and perform various displays corresponding thereto.

For example, if there is a pedestrian who is continuously moving within the crosswalk even when the pedestrian signal is not a walking signal or when the walking signal is over, it is determined that a crosswalk has occurred, and the provided warning light 132 is turned on or a display unit provided Alternatively, a warning pattern may be displayed on the auxiliary signal unit 130.

On the other hand, when the pedestrian signal is not a pedestrian signal or when the pedestrian signal is over, or when a pedestrian is still moving at the pedestrian crossing while the time until the pedestrian signal ends is not long, or when a pedestrian moving across the pedestrian crossing, the pedestrian signal ends. If it is determined that it is difficult to completely exit the crosswalk before, for the safety of pedestrians, a warning lamp may be turned on or a warning pattern may be displayed on the provided display unit 140 or the auxiliary signal unit 130.

In addition, when it is not a pedestrian signal, when a waiting person waiting on the sidewalk to cross the crosswalk enters the lane, for example, when a step down by a lane or when a vehicle is parked or stopped at a crosswalk, the lane next to the vehicle When waiting for a walking signal after going down the road, the provided warning light 132 is turned on or the provided display unit 140 or the auxiliary signal unit 130 is used to give attention to the vehicle passing through the main lane. Warning symbols can be displayed.

For this function, the pedestrian crossing sign 100 must be able to distinguish the pedestrian crossing area within the lane and the waiting area within the sidewalk from the image of the crosswalk, and the pedestrian crossing the crosswalk, getting off the lane and giving a walking signal. It should be possible to identify vehicles that are waiting or stopping in lanes, trafficking in lanes, crosswalks, and vehicles parked and stopped in crosswalks. In addition, the crosswalk sign 100 may be implemented to identify a waiting person waiting in the sidewalk, a vehicle traffic condition passing through the intersection, and a traffic accident condition at the intersection.

The configuration and operation of each part implementing the self-luminous smart pedestrian crossing sign 100 according to an embodiment of the present invention for implementing various functions as described above will be described with reference to FIG. 3.

Referring to the drawings, the crosswalk sign 100 of the present invention includes an illuminance sensor 112, GPS 114, a camera unit 115, a microphone unit 116, a communication unit 160, a storage unit 170, A light transmitting unit 120, a backlight unit 150, an auxiliary signal unit 130, a warning lamp 132, a display unit 140, and a control unit 190 may be included.

The illuminance sensor 112 generates an output value corresponding to the surrounding brightness. Based on this output value, it is possible to control the amount of light in all portions of the sign 100 to emit light and mark.

The GPS 114 positions its own position of the pedestrian crossing sign 100 by receiving time information transmitted from the satellite. This positioning information can be used to identify the installation location of each crosswalk sign in the central control center when multiple crosswalk signs are installed. For example, when the crosswalk sign 100 detects an accident situation at an intersection, the central control center may identify the location of the accident using the positioning information of the crosswalk sign.

Further, the GPS 114 enables the time of the crosswalk sign 100 to be set and corrected based on the time information of the satellite. For example, it is possible to adjust the lighting/light-emitting state of each part of the crosswalk sign 100 according to the current time.

The camera unit 115 is generally disposed toward the lower side of the crosswalk sign 100 and photographs a crosswalk installed at least under the crosswalk sign 100. The captured image is analyzed by deep learning, and is divided into a crosswalk area, a lane area including a crosswalk, a waiting area, which is a sidewalk area for waiting people to use the crosswalk, and an intersection area and another lane area. Can be. In addition, through deep learning from the captured image, a person, animal, or other object may be identified, and whether such an object is in a moving or stationary state may be identified.

The microphone unit 116 is disposed to detect noise in a lane or intersection around a crosswalk, and may be used to distinguish traffic accidents or other criminal situations.

The communication unit 160 enables the crosswalk sign 100 to communicate with a remote central control center or a remote control of an operator by wire or wirelessly.

The communication unit 160 may provide, for example, a wireless Internet function. Alternatively, the communication unit 160 may support various communication methods such as Bluetooth communication, NFC communication, infrared communication, LAN communication, and power line communication. For example, through the communication unit 160, a photographed image may be transmitted in real time or at random intervals. In addition, operation options of each part of the crosswalk sign 100 may be remotely controlled by a central control center or an operator.

The storage unit 170 may include a mass storage device, and is particularly used to store an image captured by the camera unit 115. Stored images may be sequentially deleted at a preset time point or transmitted to a central control center.

The light-transmitting unit 120 may include, for example, a high-intensity LED to illuminate the surface of the crosswalk. The light-transmitting unit 120 may be turned on at all times to illuminate a crosswalk, or may be turned on in synchronization with a pedestrian signal of the crosswalk, or when a lane entry or an unauthorized crossing is detected.

The backlight unit 150 implements a backlight that illuminates the pattern of the main sign plate 210. As shown in FIG. 4, the backlight unit 150 may include a plurality of LEDs disposed on the edge of the light guide plate 240 and disposed along the surface direction of the light guide plate 240. The backlight unit 150 is basically implemented to emit white light (W), but may be implemented to selectively emit light of another color such as green (G). In this case, normally, white light is emitted so that the pattern of the cover surface 220 is displayed in white, but when an endless crossing occurs, the cover surface 220 is illuminated in green or in a manner in which white and green flash alternately. Can alert the driver.

The auxiliary signal unit 130 may be disposed one on both sides of the main sign plate 210, for example, to display guidance to a driver of a vehicle who intends to enter the main lane from a lane in each direction. To this end, the auxiliary signal unit 130 may be installed on the rotating shaft so that the direction of the auxiliary signal unit 130 can be arbitrarily adjusted, as shown in FIG. 1. In addition, the auxiliary signal unit 130, as shown in FIG. 5, is implemented in the form of a polygonal column having a plurality of display surfaces fixed to face a specific direction, or configured as a curved surface so that it can be viewed from several directions at the same time. It can also be implemented.

The warning lamp 132 may be configured to emit warning lights of a specific color or various colors. For example, when an unauthorized crossing is detected in a pedestrian crossing or a vehicle entering a lane is detected, it may be turned on to warn the driver.

The display unit 140 may display various guide phrases to at least a vehicle traveling on the main lane or a driver of a vehicle stopping on the main lane. For example, "Travel crossing occurs, stop", "Pedestrians in the lane, be careful", "An accident occurs at the intersection, be careful", "An obstacle occurred in the lane, be careful", "Under road construction, please proceed slowly. A phrase or pattern to guide the situation of a crosswalk and/or an intersection, such as ", "drinking crackdown, please slow down" may be displayed.

The control unit 190 controls the operation of each part constituting the crosswalk sign 100 described above.

The control unit 190 receives an output value from the illuminance sensor 112, identifies the ambient illuminance, and corresponds to the identified illuminance, the light transmitting unit 120, the backlight unit 150, and the auxiliary signal unit ( 130), the light emission intensity (brightness), color, and/or blinking of the warning lamp 132 and the display unit 140 may be adjusted. That is, the brightness can be adjusted according to daylight conditions, sunset/sunrise, nighttime, or dark due to cloudy weather.

The controller 190 may always maintain an accurate time by setting and correcting its own time based on the time information received from the GPS 114. And, based on the correct time (also in combination with the above-described illuminance sensor), it is possible to adjust the brightness of each part.

The control unit 190 may receive an image captured by the camera unit 115 and store it in the storage unit 170 or transmit it through the communication unit 160. In particular, the control unit 190 analyzes the captured image to identify each area including a crosswalk area, a waiting person, a crosswalk, a traffic lane, an obstacle, a vehicle, and the like. In addition, based on the identification result of each object and their moving state, the warning may be output/lighted/displayed through each part in various ways.

That is, the control unit 190 is a pedestrian waiting for a walking signal in a waiting area in the sidewalk in contact with the pedestrian crossing, a pedestrian waiting for a walking signal in the crosswalk while getting off the road in the waiting area, or the surroundings of a vehicle parked or stopped in the crosswalk. Entering into a lane waiting for a pedestrian signal within a pedestrian crossing in the city. Through other parts, you can identify the crossings crossing the lane. In addition, the control unit 190 may identify a vehicle that has stopped within the crosswalk.

Further, the control unit 190 may identify a ball, cart, or other movable object that appears in the lane. In particular, the control unit 190 may identify an animal such as a cat or a dog. In addition, the control unit 190 identifies various objects such as people, objects, and animals, analyzes and determines whether these objects are stationary in the lane or in the sidewalk, and whether they are moving in the lane, and It is implemented so that possible collision situations can be predicted, and appropriate guidance or warning can be displayed in various ways accordingly.

In addition, the controller 190 analyzes the sound received from the microphone unit 116 to identify various situations occurring on the road. For example, when a vehicle impact sound, a tire friction sound, a siren sound, a human scream, etc. are detected on a nearby road, it may be determined that a traffic accident has occurred. In addition, when a siren sound or a person's scream is detected, it may be determined that other criminal events have occurred. In addition, the controller 190 may perform judgment of a traffic accident or a criminal case in combination with the captured image.

The control unit 190 communicates with a remote central control center or an operator's remote control through the communication unit 160, receives various control commands, and transmits information indicating its own operation status or currently sensed information or stored information. can do. As a result, the crosswalk sign 100 can be controlled not only by its own operation, but also by a remote operator. For example, when a construction is executed near a crosswalk sign, a warning light is turned on by remote control of an operator, and the control may be controlled to display a text/pattern indicating that construction is under construction.

In addition, the control unit 190 may control operations such as the light transmitting unit, the auxiliary signal unit, and the warning lamp, as described above. Additionally, the crosswalk sign 100 may include a speaker, and various warning sounds may be output through the speaker under the control of the controller 190.

4 is a view showing the configuration of a main sign of a self-luminous smart pedestrian crossing sign according to the present invention. The main sign plate 210 is manufactured in a prescribed size so that the driver of a vehicle traveling mainly on the main lane can accurately recognize from a distance that a crosswalk is installed in the main lane, and has a prescribed shape and color pattern. It is implemented in the form of a formed panel. In particular, the main sign plate 210 according to the present invention includes a sign surface 220 configured to visually identify colors and patterns without any special lighting.

The sign surface 220 is composed of a white display area 221 including a pedestrian shape, a crosswalk shape, and a character shape “crosswalk”, and a blue retroreflective area 222 around the pedestrian shape. The display area 221 and the retroreflective area 222 can diffuse or partially transmit light illuminated from the rear, whereby the cover surface 220 is uniformly white light from the rear by the light guide plate 240 When illuminated, it can be illuminated in white and blue respectively.

A backlight unit 150 that emits light of a predetermined color in the surface direction of the light guide plate 240 may be disposed at an edge of one side of the light guide plate 240. The backlight unit 150 may include, for example, a plurality of LEDs arranged side by side on a strip-shaped substrate corresponding to the width of the light guide plate 240, as illustrated. In this case, a white LED (W) for basic white light illumination and a green LED (G) for illumination in a predetermined color, for example, green may be intermittently disposed.

If the backlight unit 150 turns on the white LED (W) and the green LED (G) at the same time, light green light will be uniformly emitted from the entire surface of the light guide plate 240 to illuminate the cover surface 220, In this case, the display area 221 is displayed in light green, and the retroreflective area 222 is displayed in a color mixed with light green and blue.

In particular, if the white LED (W) and the green LED (G) are alternately lit, at least the display area 221 will be illuminated alternately in white and green, so if the driver driving the main lane is not confused with other traffic lights You will be able to recognize the warning that you should pay attention to crosswalks in Seodo.

Meanwhile, the main sign plate 210 of the present invention is characterized in that it further includes a light-transmitting spacer 230 between the sign surface 220 and the light guide plate 240. In the theoretical aspect, there is no problem in placing the light guide plate 240 and the cover surface 220 in close contact with each other. However, in actual implementation, if the light guide plate 240 and the cover surface 220 are in close contact with each other, the light scattered from the light guide plate 240 does not pass through the cover surface 220 properly, so that the cover surface 220 appears dark. This happens.

In order to improve this phenomenon, in the present invention, a transmissive spacer 230 is disposed between the light guide plate 240 and the cover surface 220 to separate them by a predetermined distance. The light-transmitting spacer 230 is made of a transparent or translucent light-transmitting material, and may have a thickness of 3 to 20 mm that can be determined experimentally.

5 is a diagram illustrating an example of an auxiliary signal unit. The self-illuminating smart pedestrian crossing sign 100 according to the present invention includes an auxiliary signal unit 130 arranged to be seen by a driver in a lane in a direction different from the main lane, and such an auxiliary signal unit 130 Is preferably implemented to face a different direction than the main sign 210.

In FIG. 1, it is shown that the auxiliary signal unit 130 is installed on the side of the main sign plate 210 through a rotating shaft. In this case, the direction of the auxiliary signal unit 130 may be set to look at an optimal direction according to the installation environment of the crosswalk sign 100.

On the other hand, in (a) of FIG. 5, for example, the auxiliary signal unit 130 in the form of a quadrangular column is shown. At this time, by installing display LEDs on at least three sides, it is possible to display a pattern in three directions.

In addition, (b) of FIG. 5 shows the auxiliary signal unit 130 in which the LED for display is formed in a curved surface in the form of a circular column. When configured in such a curved shape, a pedestrian pattern walking from one side of the auxiliary signal unit 130 to the other may be displayed during the walking signal, and a stopped person pattern may be simultaneously displayed at a plurality of positions during the stop signal. In addition, the auxiliary signal unit 130 may be implemented to display at least red and green, and additionally various colors.

The embodiments of the present invention described above are merely illustrative of the technical spirit of the present invention, and the scope of protection of the present invention should be interpreted by the following claims. In addition, those of ordinary skill in the technical field to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention, and all technical ideas within the scope equivalent to the present invention are the present invention. It should be interpreted as being included in the scope of rights of

Claims (5)

As a crosswalk sign installed in the air above the crosswalk installed on any main lane of an intersection:
A main sign disposed toward a driver traveling on the main lane-The main sign includes a light-transmitting display area of a predetermined pattern and a retroreflective area around the cover surface, and the cover surface at a portion of the circumference of the rear of the cover surface. A backlight unit capable of selectively emitting white light and light of any other color in the direction of the surface; A light guide plate for illuminating the entire cover surface by refracting and scattering light from the backlight unit, and a light transmitting spacer interposed between the light guide plate and the cover surface to diffuse the light -;
A light transmitting part for illuminating the crosswalk;
A camera unit for photographing the crosswalk;
Controls the lighting of the backlight unit and the light-transmitting unit, analyzes the image captured by the camera unit, and enters the main lane to enter the main lane to wait for a pedestrian signal, and an endless crossing crossing the main lane at the pedestrian stop signal And a control unit for determining a ruler and controlling lighting of the backlight unit and the light transmitting unit in a manner corresponding to each situation,

The control unit,
In the captured image, an area corresponding to the crosswalk installed in the main lane is set as a crosswalk area,
Pedestrians waiting for a pedestrian signal while entering the crosswalk area within the main lane during a pedestrian stop signal, and a state of entering the crosswalk area within the main lane while being around a vehicle stopped within the crosswalk area during a pedestrian stop signal Pedestrians waiting for a pedestrian signal at, and a pedestrian who is stopped or moving within the crosswalk area when the remaining time of the pedestrian signal is not sufficient are determined as the lane entry,
A pedestrian who is stopped or moving within the crosswalk area during the pedestrian stop signal is determined as the crosswalk,

In addition, the control unit,
The color of the backlight unit is controlled differently in response to each case of detecting the particles entering the lane and when detecting the endless crossing terminal, and
A self-illuminating smart pedestrian crossing sign, characterized in that for controlling the lighting of the light-transmitting unit when a pedestrian signal is detected, when the vehicle entering the lane is detected, when the stepless crossing is detected, and when a traffic accident occurs. delete The method of claim 1,
At least one auxiliary signal unit disposed toward a driver of another lane crossing the main lane-The auxiliary signal unit is disposed on one side of the main sign and is capable of emitting light to display a predetermined color or pattern, and Further comprising a control configured to display a corresponding color or pattern according to whether a pedestrian signal or a pedestrian stop signal of the main lane or whether the vehicle entering the lane or the endless crossing is detected;
The auxiliary signal unit includes at least one auxiliary signal unit toward a driver entering the main lane by turning right at a left lane, and at least one other auxiliary signal unit toward a driver entering the main lane by turning left at the right lane. Characterized in that, self-luminous smart pedestrian crossing sign. The method of claim 1,
It is disposed toward the driver of the main lane, further comprising a display unit for displaying a predetermined phrase or pattern,
The control unit, characterized in that for controlling the phrase or pattern displayed on the display unit in response to the detection of the lane entry and the detection of the endless crossing, self-illuminating smart pedestrian crossing sign. The method of claim 1,
A microphone collecting ambient sound;
A vibration sensor for sensing vibration;
It is disposed toward the driver of the main lane, further comprising a display unit for displaying a predetermined phrase or pattern,
The control unit controls the display unit to detect the occurrence of obstacles and traffic accidents on the main lane by analyzing the captured image and the collected sound and vibration, and to display a phrase or pattern representing the detected situation. , Self-illuminating smart pedestrian crossing sign.

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