KR102472854B1 - High functional floor-type pedestrian traffic light - Google Patents

Abstract

The present invention relates to a high-functionality floor-type walking traffic light, which complements technology for the prior registered patent 10-2285404 (registration date July 28, 2021) of the present applicant to enhance impact resistance through a protective block, prevent glare for drivers due to a decrease in the amount of light on the road side, improve the visibility of walking signals, have a surface anti-slip function through the convex structure of the surface with different heights even when covered with foreign substances such as snow or sand, and prevent confusion of pedestrians due to the expression of an abnormal signal even when a problem occurs in a walking signal display unit.

Description

High functional floor-type pedestrian traffic light with improved impact resistance, anti-dazzle effect, improved visibility of walking signals and prevention of abnormal expression of the walking signal display area {High functional floor-type pedestrian traffic light}

The present invention supplements the technology of the applicant's prior registered patent No. 10-2285404 (registration date July 28, 2021) to enhance impact resistance through a protection block, reduce the amount of light on the road side, prevent glare for the driver, and improve walking It improves the visibility of the signal, and has a surface slip prevention function through the convex structure of the surface with different heights even when covered with external foreign substances such as snow or sand. It relates to a high-functional floor-type walking signal light that can prevent

In general, crosswalks installed for pedestrians on roads and roads are installed by painting colored pigments on asphalt roads that recognize crosswalks and induce safe crossing for pedestrians, or colored pigments containing reflectors to secure more visibility. paint and install

Also, on a sidewalk adjacent to a road equipped with a crosswalk, a crosswalk signal light periodically displaying a stop signal and a crossing signal is installed at a certain height.

On the other hand, with the recent spread of smart phones, many people are walking with their eyes on their smart phones. Crosswalk traffic lights are installed at the eye level of pedestrians, but you have to raise your head to check the signal. Therefore, it is not easy for pedestrians to use mobile phones with their heads down to check the crosswalk signal. There is a problem of walking without paying attention and getting into a traffic accident.

In order to solve the above problems, Registration Patent No. 10-2015022 "LED floor traffic light" has been disclosed.

A traffic light according to the prior art includes a case, a watertight packing, an LED panel, an expandable member, and a cover as main components.

It can be seen that the case included in the conventional traffic light includes an upper case and a lower case, and an upper space and a lower space partitioned by the LED panel disposed in the upper case are formed.

Here, air expands or contracts in the inner space of the upper case according to temperature changes. Cracks may occur in the case due to repetition of air expansion and contraction.

In addition, since the inner side of the upper case is made of a space, a crack may be generated in the case due to pressure applied from the top.

In addition, when a crack occurs in the case, there is a problem in that external moisture may penetrate through the crack, and the operation of the LED panel is affected by the external moisture that penetrates.

In addition, there is a problem in that moisture is generated inside the case according to the temperature change of the inner space of the case, and the generated moisture affects the operation of the LED panel.

In addition, there is a problem that moisture is generated on the inner circumferential surface of the case due to moisture generated inside the case, and the generated moisture flows to the LED panel along the inner circumferential surface of the case and affects the operation of the LED panel.

In order to solve such a problem, the present inventors have disclosed a technique for "ground-embedded traffic light using LED" registered patent No. 10-2119656.

In the case of the above registered patent, due to the nature of the equipment operated exposed to the external environment, it is continuously exposed to frequent temperature changes and strong external shocks caused by vehicles, etc. As a result, there was a risk of damage such as deformation and cracking of the enclosure.

In addition, in the case of the existing floor-type pedestrian traffic light device, it is manufactured as an integrated structure that completely seals the inside with hardener for waterproofing. As a result, damage such as deformation and cracking of the enclosure occurs due to expansion and contraction of the internal air due to temperature change and strong external pressure and impact caused by vehicles. Since it was impossible to replace the entire floor-type pedestrian traffic light, it was uneconomical and difficult to maintain.

In order to solve this problem, the present applicant filed a patent application for a floor-type walking signal light with functions of mitigating external shock and maintaining internal pressure, and received a patent registration (Registered Patent No. 10-2285404).

The registered patent No. 10-2285404 (registration date July 28, 2021) is proposed to solve the problems of the prior art, and is prefabricated by sealing between the main body and the outer case in a double structure using a soft material having shock absorbing ability By configuring it, it effectively secures vibration resistance and impact resistance, and includes a means for mitigating the increase in internal pressure inside the main body due to air expansion so that the internal air pressure is maintained at a certain level, thereby damaging the floor-type walking traffic light device. It relates to a floor-type walking traffic light that can effectively prevent the occurrence of malfunctions or breakdowns.

The present applicant further complements the functionality of the floor-type walking traffic light presented in the above registered patent 10-2285404 (registration date July 28, 2021), thereby enhancing impact resistance and reducing the amount of light on the road side to prevent glare for the driver and , It improves the visibility of the walking signal, and has a surface anti-slip function through the convex structure of the surface with different heights even when covered with external foreign substances such as snow or sand. We would like to present a highly functional floor-type walking traffic light that can prevent confusion.

Korean Registered Patent No. 10-2285404 (registration date July 28, 2021)

The present invention supplements the technology of the applicant's prior registered patent No. 10-2285404 (registration date July 28, 2021) to enhance impact resistance through a protection block, reduce the amount of light on the road side, prevent glare for the driver, and improve walking It improves the visibility of the signal and provides a surface anti-slip function through the convex structure of the surface with different heights even when covered with foreign substances such as snow or sand.

Through the signal backflow prevention function of the walking signal LED display part included in the floor-type walking signal light, when a problem occurs on the walking signal display unit, pedestrian confusion due to abnormal signal expression is prevented and the point where the problem occurs can be accurately identified to save maintenance time And it is an object of the invention to provide a floor-type walking traffic light with high functionality that can reduce costs.

In order to achieve the above purpose,

The present invention is a traffic light embedded at a predetermined depth in the road surface on a crosswalk installed on the road,

It is equipped with a plurality of cables for operating signal lines and power supply lines connected to the LED light emitting unit, and a plurality of internal pressure reducing auxiliary holes and internal and external pressure reducing holes for adjusting the air pressure in the internal space formed through coupling with the first block. A lower case comprising;

The first block of the filling block forming a space of a predetermined width in the upper direction of the lower case by wrapping and combining the lower case as a whole, and the upper surface forming an inclined surface;

An LED light emitting unit installed to be seated on the upper surface of the first block and installed to have an angle of inclination of 10 ° to 15 ° in the direction of India based on the horizontal line;

The LED light emitting unit covers the entirety of the LED light emitting unit to minimize the decrease in light amount due to the inclination of the LED light emitting unit and to maintain color visibility regardless of the angle between the eyes of the pedestrian, while having a light amount reduction and anti-glare function on the side of the roadway, the LED light emitting unit And a second block of the LED lens protection block having a function of increasing the overall load capacity and increasing the impact resistance of the weak part of the upper case,

An upper case that covers the lower case, the first block, the LED light emitting part, and the second block as a whole and forms an expression part in which a walking signal is expressed in a state in which protrusions including a plurality of main protrusions and auxiliary protrusions are formed on the upper surface;

A high-functional floor type including a control unit for controlling the expression of walking signals through the LED light emitting unit, which includes improved impact resistance, anti-glare effect on the road side, improved visibility of walking signals, and an effect of preventing abnormal expression of the walking signal expressing portion. Pedestrian traffic lights are provided.

The functional floor-type walking traffic light according to the present invention has the following effects.

first. By applying the lens structure to the pedestrian side (radial inner curved surface treatment centered on LED), the decrease in light amount due to the inclination is minimized. From the boundary where this ends, a separate deformation structure (applying air circulation and directional interference space) is applied to the space in the direction of the roadway to reduce the amount of light on the roadside and to prevent glare.

second. The radial height difference protrusion structure adopts a radial pattern based on a 15 degree irradiation angle at the center of the light source so as not to interfere with the light irradiation of each LED light source, and external foreign substances such as snow or sand are removed through the height change of the primary central protrusion and the secondary radial protrusion. It has the advantage that the surface can maintain the concavo-convex structure even in a covered situation.

third. By applying the outer filler pressure discharge space structure to the lower part of the exposed part, it provides a fluid space for the surface of the filler when the temperature changes, maintaining a constant pressure in the internal space, and turning the fluid space to the outer 35% space to the corner side so that there is no damage caused by excessive changes in internal pressure. configure towards

fourth. The air circulation hole of the existing patent increases the anti-condensation efficiency by adding an auxiliary circulation hole, and adds an effect of preventing glare and reducing the amount of light by forming an overlapping surface with the inner lip structure on the road side.

fifth. In the case of a short on the lines and circuits constituting the display part of the floor traffic light - short between signal lines, power (+) - short between signal lines, power (-) - short between signal lines -, the operation of the previous display part at the location of the problem is affected. It is possible to change the direction of the display part simply by changing the polarity of the power supply (DC +/-) without

When abnormal signal conditions such as simultaneous input of R and G signals occur, the display unit itself turns off the LED and enables the error situation to be displayed, thereby reducing pedestrian confusion due to abnormal signal display when a problem occurs on the line and display unit of the floor-type walking traffic light. It has the advantage of reducing maintenance time and cost by preventing and accurately identifying the location of the problem.

1 is an overall configuration diagram of a floor-type walking traffic light according to the present invention.
Figure 2 is an overall external perspective view of a floor-type walking traffic light according to the present invention.
Figure 3 is an exploded perspective view of a floor-type walking traffic light according to the present invention.
Figure 4 is another exploded perspective view of the floor-type walking traffic light according to the present invention.
Figure 5 is an overall perspective view of the lower case constituting the floor-type walking traffic light of the present invention.
Figure 6 is a top view of the lower case shown in Figure 5;
Figure 7 is a side cross-sectional view of the floor-type sight traffic light according to the present invention.
Figure 8 is a perspective view showing the structure of the second block of the floor-type walking traffic light according to the present invention.
Figure 9 is another side cross-sectional view of the floor-type walking traffic light according to the present invention.
Figure 10 is a cross-sectional side view showing a coupling structure between the LED lamp constituting the floor-type walking traffic light according to the present invention, the LED main air circulation hole and the auxiliary air circulation hole.
11 shows a state in which the working relationship between the protrusions disposed around the LED lamp constituting the floor-type walking traffic light according to the present invention, the LED main air circulation hole and the auxiliary air circulation hole is viewed from the road side direction and the side direction. one drawing.
FIG. 12 is a view showing the overall expression of the uppermost section of a floor-type walking traffic light viewed from the road side and the sidewalk side in a state in which the contents of FIG. 11 are reflected.
13 is a top view of an upper case constituting a floor-type walking traffic light according to the present invention.
14 is another top view of an upper case constituting a floor-type walking traffic light according to the present invention.
15 is a partially enlarged view of a projection formed on an upper case of a floor-type walking signal light according to the present invention.
16 is a cross-sectional side view showing a protruding structure formed on an upper case of a floor-type walking signal light according to the present invention.
17 is a side cross-sectional view of a conventional floor-type walking traffic light.
18 is a configuration diagram of a 4-wire control structure applied to a conventional floor-type walking traffic light, showing an example of an abnormal operation when a line is shorted.
19 is a block diagram showing components of a control unit according to the present invention;
20 is a block diagram showing the components of the LED driving unit included in the control unit of FIG. 19;
21 is a control diagram showing components of the LED driving unit shown in FIG. 20;
FIG. 22 is an enlarged view of the drive signal input unit 63a for floor-type walking traffic lights shown in FIG. 21;
23 is an enlarged view of the voltage sensing drop portion 63b shown in FIG. 21;
FIG. 24 is an enlarged view of the red signal dimmer control forward control circuit part 63c shown in FIG. 21;
FIG. 25 is an enlarged view of the green signal dimmer control forward direction control circuit part 63d shown in FIG. 21;
FIG. 26 is an enlarged view of the red signal dimmer control reverse direction control circuit part 63e shown in FIG. 21;
FIG. 27 is an enlarged view of the green signal dimmer control reverse direction control circuit part 63f shown in FIG. 21;
Fig. 28 is an enlarged view of the constant current IC unit 63g for green signal shown in Fig. 21;
Fig. 29 is an enlarged view of the constant current IC unit 63h for red signal shown in Fig. 21;
Fig. 30 is an enlarged view of the step-down IC section 63i shown in Fig. 21;
31 is an enlarged view of the green LED waveform sensing unit 63j shown in FIG. 21;
32 is an enlarged view of the red LED waveform sensing unit 63k shown in FIG. 21;
FIG. 33 is an enlarged view of an LED driving control unit (MCU) 63l shown in FIG. 21;
34 is an enlarged view of the warning LED unit 63l-1 shown in FIG. 21;
FIG. 35 is an exemplary diagram illustrating an operation process of the red signal dimmer control forward direction control circuit part 63c included in the LED driver shown in FIG. 20;
FIG. 36 is an exemplary diagram illustrating an operation process of the red signal dimmer control reverse direction control circuit part 63e included in the LED driver shown in FIG. 20;

Hereinafter, specific technical details of a functional floor-type walking signal light having an effect of improving impact resistance, preventing glare on the side of a road, improving visibility of a walking signal, and preventing abnormal expression of a walking signal display part according to the present invention will be reviewed together with drawings.

As the functional floor-type walking traffic light 1 according to the present invention is shown in FIGS. 1 to 4,

As a traffic light embedded at a predetermined depth in the road surface on a crosswalk installed on the road,

A plurality of internal pressure reducing auxiliary holes 101 for adjusting the air pressure in the internal space formed through coupling with the first block, and internal and external pressure A lower case 10 including a reduction hole 102,

The first block 20 of the filling block forming a space of a predetermined width in the upper direction of the lower case 10 by wrapping and combining the lower case 10 as a whole, the upper surface forming an inclined surface;

An LED light emitting unit 30 installed to be seated on the upper surface of the first block 20 and installed to have an inclination of 10 ° to 15 ° in the direction of India based on the horizontal line;

By covering the LED light emitting part 30 as a whole, the decrease in light amount due to the inclination of the LED light emitting part 30 is minimized, and the pedestrian maintains color visibility regardless of the gaze angle, and the light amount is reduced and the glare is prevented on the side of the road The second block 40 of the LED lens protection block having a function of increasing the LED light emitting part and overall load capacity and increasing the impact resistance of the weak part of the upper case while having a

While covering the lower case 10, the first block 20, the LED light emitting part 30, and the second block 40 as a whole, walking in a state in which a protrusion 51 including a plurality of main protrusions and auxiliary protrusions is formed on the upper surface. An upper case 50 constituting an expression portion 52 through which signals are expressed;

It includes a control unit 60 that controls the walking signal expression through the LED light emitting unit 30.

As shown in FIGS. 1 to 4, the floor-type walking traffic light 1 is composed of a lower case 10, a first block 20, and an LED driver mounted on the bottom sequentially from the bottom. The light emitting part 30, the second block 40, and the upper case 50 are combined as a whole while forming a laminated structure to form an integral body.

The lower case 10, the first block 20, the second block 40 and the upper case 50 are made of polycarbonate (PC) material.

The polycarbonate (PC) is a resin made by polymerizing carbonate, and is a colorless, transparent, amorphous thermoplastic polymer consisting of a chain structure of bisphenol A (BPA) and phosgene, and has good heat resistance, impact resistance and transparency. It is widely used as commodity plastics, engineering plastics, and reinforced plastics that substitute for glass. It is a high-performance plastic widely used as a raw material for media optical storage media materials such as CDs and DVDs, as well as exterior materials for IT products such as mobile phones, laptops, and monitors.

Hereinafter, the configuration of each part constituting the floor-type walking traffic light 1 according to the present invention will be sequentially reviewed together with the drawings.

[ Lower case ]

5 and 6 are views showing the lower case 10 constituting the floor-type walking traffic light of the present invention. As shown in FIGS. 5 and 6, the lower case 10 has an internal pressure reducing auxiliary hole ( 101) and a plurality of internal and external pressure reducing holes 102 are formed. As an example, FIG. 5 shows a state in which two internal pressure reducing auxiliary holes 101 and eight internal and external pressure reducing holes 102 are formed.

The internal pressure reducing auxiliary hole 101 and the internal and external pressure reducing hole 102 are presented as examples, and can be applied by variously modifying the number and shape within the condition range having the function.

The internal pressure reducing auxiliary hole 101 is used as an auxiliary fastening hole for adding functional parts when necessary, and is fastened with the first block 20, which is a filling block, until the functional parts are applied. It has a function of a pressure discharge auxiliary hole for discharging the generated pressure in the upper inner space of the lower case 10 to the outside.

The internal and external pressure reduction hole 102 plays a role of minimizing the expansion pressure generated by the first block 20, which is a filling block fastened to the upper part of the lower case 10, and the pressure continuously applied from the upper direction to the lower direction As a result, it serves to prevent cracks from occurring at the corners of floor-type walking traffic lights.

In addition, as shown in FIG. 6, the central portion 103 formed in the center of the lower case 10 is utilized as a cable protection space.

[ Block 1 ]

As shown in FIGS. 1 and 7, the first block 20 is a filling block, and is combined while surrounding the lower case 10 as a whole to form a space of a predetermined width toward the top of the lower case 10. form And the upper surface of the first block 10 forms a slope inclined toward the pedestrian side.

More specifically, as shown in FIG. 7 , the top surface of the upper case 50 has a downward slope of 10° to 15° with the reference horizontal plane. More specifically, it has an inclination of 10°.

[ LED emitting part ]

As shown in FIGS. 4 and 7 , the LED light emitting unit 30 is installed to have an inclination of 10° to 15° in the direction of guidance by being seated on the upper surface of the first block 20 . At this time, as shown in FIG. 1, the LED driving unit 63, which is a component of the control unit 60, is mounted on the lower surface of the light emitting unit 30.

The floor-type walking traffic light 1 according to the present invention sends a walking signal to pedestrians through a plurality of LED lenses 301 installed in the LED light emitting unit 30 according to a control signal from the control unit 60, At this time, the LED lens 301 has an inclined structure inclined at an angle of 10 ° to 15 ° in the direction of the pedestrian, the inner structure of the second block 40 formed on the upper part of the LED lens 301 and the upper case 50. The amount of light and visibility of the LEDs are designed to be optimized for pedestrians through the arrangement structure of the formed protrusions.

On the other hand, on the road side, the LED light is diffusely reflected by the inner structure of the second block 40 and the arrangement structure of the protrusions formed on the upper case 50, so that the driver can avoid glare caused by the walking signal of the floor-type walking signal light. By eliminating or minimizing it, it is possible to solve the driver's driving disturbance problem caused by the existing floor-type pedestrian traffic lights.

More detailed information on this will be described in the second block 40 and the upper case 50 to be described later.

[ Block 2 ]

The second block 40 is an LED lens protection block, as shown in FIGS. 3, 4 and 7, and covers the LED light emitting part 30 as a whole, thereby emitting light according to the inclination of the LED light emitting part 30. Minimize the reduction and maintain the color visibility regardless of the angle between the eyes of the pedestrian, reduce the amount of light and prevent glare on the side of the road, increase the LED light emitting part and the overall load capacity, and improve the impact resistance of the weak part of the upper case has an augmentation function.

Moreover, through the configuration of the second block 40 as the protective block, damage to the case and cracking of upper components due to external pressure and load are prevented, thereby preventing external moisture that may affect the operation of the LED light emitting unit 30. It serves to prevent inflow and increase durability.

8 to 10, on the upper surface of the second block 40, the LED main air circulation hole 401 for preventing moisture of the plurality of LED lenses 301 installed in the LED light emitting unit 30 ) and auxiliary air circulation holes 402 are formed in pairs while forming a plurality, and the LED main air circulation holes 401 form a penetrating structure with the LED lens 301.

A temperature difference is generated between the LED main air circulation hole 401 and the auxiliary air circulation hole 402 where the LED lens 301 is disposed by the light emitting LED of the LED lens 301, and this temperature difference is caused by the air pressure between the two. It is designed to generate a difference and achieve natural circulation by the air circulation principle. Through this, a multi-functional structure that can perform condensation prevention function together in addition to the structural function of forming diffused reflection on the road side is formed.

The LED main air circulation hole 401 extends to the part where the LED lens 301 is installed and is formed through,

The inner surface of the point facing the LED lens 301 is spaced apart from the LED lens 301 by a predetermined width to form a radial curved lens structure, so that the LED light emitting unit is inclined at an angle of 10 ° to 15 ° in the direction of India It is configured to minimize the glare of the driver on the road side by making it possible to maintain clear visibility of the LED lens 301 even at an inclined angle of (30) and to achieve diffuse reflection in the direction of the road side.

The LED main air circulation hole 401 extends to the part where the LED lens 301 is installed and is formed through,

A prism lens unit (a1) and a curved lens unit for maintaining visibility of the LED lens 301 whose inner surface (A) at the point facing the LED lens 301 is inclined at an angle of 10° to 15° toward the side of India. (a2) is continuous and forms one body.

The curved lens structure of the inner surface (A) of the point facing the LED lens 301 is formed only in the pedestrian side direction, and in the opposite direction induces diffuse reflection of LED light by a straight structure, and also the LED main air The auxiliary air circulation hole 402 formed in a pair with the circulation hole 401 in the driveway-side direction forms an additional interference structure for preventing glare in the driveway-side direction by the LED light,

In the sidewalk direction, the amount of LED light and visibility are optimized for pedestrians, while in the roadway direction, glare is minimized through diffuse reflection to remove drivers' distractions.

Information on this can be confirmed through the drawing shown in FIG. 11 .

As confirmed through the drawing shown in FIG. 11, in a state tilted 10 ° toward the road side, the LED light is the main inner surface (A) of the curved lens structure and the upper case 50 formed in plurality on the upper surface. Through the optimized arrangement structure of the protrusion 511 and the auxiliary protrusion 512, it can be confirmed that the amount of light and visibility of the LED are optimized for pedestrians.

On the other hand, due to the indirect action of the LED light on the road side in the opposite direction, it can be seen that the light emitting area is significantly reduced when compared to the sidewalk side.

FIG. 12 shows the overall view of the uppermost surface of the floor-type walking traffic light viewed from the road side and the sidewalk side in a state in which the contents of FIG. 11 are reflected.

If (a) of FIG. 12 is viewed in conjunction with the drawing in the direction of the sidewalk shown in FIG. 11, a pedestrian-centered optimization design forms a structure capable of maintaining perfect signal visibility centered on LEDs.

If (b) of FIG. 12 is viewed in conjunction with the drawing in the direction of India shown in FIG. 11, a structure effective in reducing the amount of light and preventing glare due to the structural diffused reflection effect is formed.

[ Upper case ]

As shown in FIGS. 1, 3, 4, 7, 9 and 10, the upper case 50 includes the lower case 10, the first block 20, and the LED light emitting unit 30. And a protrusion 51 including a plurality of main protrusions 511 and auxiliary protrusions 512 is formed on the uppermost upper surface while covering the second block 40 as a whole, and in a state where the protrusions 51 are formed, a walking signal It forms an expression part that is expressed toward the pedestrian.

13 to 15, the upper case 50 forms a plurality of main protrusions 511 and auxiliary protrusions 512 on the upper surface,

As shown in FIGS. 11 and 15, the main protrusion 511 is located on the lower part of the upper case 50 and is tilted at an angle of 10° to 15° in the direction of delivery. It is installed at four points in the radial cross direction using as a reference point, and the auxiliary protrusions 512 are installed at midpoints on a virtual line connecting the main protrusions 511 and 511 to each other. By doing so,

14 and 16, formed by the arrangement structure of the main projection 511 and auxiliary projection 512 having different heights and the arrangement structure of the continuous main projection 511 and auxiliary projection 512 The zigzag pattern forms an additional non-slip structure, and by maintaining the surface curvature from the precipitate by the main protrusion 511 and the auxiliary protrusion 512 having different heights, it is possible to improve more stable surface non-slip functionality in various directions. In addition to such a non-slip structure, the amount of light and visibility of the LED lens 301 can be optimized for pedestrians.

At this time, the main protrusion 511 and the auxiliary protrusion 512 form a double protrusion structure with different heights optimized for the arrangement structure of the LEDs in the direction of delivery.

17 is a view showing a conventional floor-type walking traffic light. The conventional floor-type walking traffic light has a disadvantage in that the non-slip protrusions of the exposed part have a simple arrangement of a radial basic pattern and do not consider the LED arrangement, which affects functional visibility. The non-slip protrusion of the floor-type walking traffic light according to the invention has the advantage of not affecting the functional visibility as much as possible in consideration of the LED arrangement, and excellent anti-slip is possible due to the reinforced protrusion of 168 holes.

In addition, although heat dissipation by the joint structure without tolerance between the upper case and the block formed under the upper case was not effectively achieved, in the present invention, as shown in FIG. 7, the floor-type walking traffic light (1) according to the present invention By forming a separation space between the upper surface of the silver second block 40 and the inner lower surface of the upper case 50, an air circulation layer is formed to improve the heat dissipation function through air circulation. More specifically, a gap of 0.2 to 0.3 mm is formed.

In addition, since the conventional floor-type walking traffic light has a general prism structure in a portion covering the LED lamp, the walking signal of the floor-type walking traffic light has a structure in which it is difficult to achieve pedestrian-centered optimization.

[control unit]

As shown in FIG. 19, the control unit 60 includes a control module 61, a power supply unit 62 for supplying power to the control module, and an LED according to a control signal of the control module. Including the LED driving unit 63 for driving the light emitting unit 30, the walking signal expression through the LED light emitting unit 30 is controlled.

In the case of a floor-type walking traffic light, since it is installed inclined at 10 degrees toward the sidewalk, it is necessary to enable both directions of power application depending on the location of the controller, so as shown in FIG. 18, a conventional 4-wire control structure has been achieved.

However, due to the structural problems of the conventional four-wire control structure, when a short circuit occurs in any part of the line or circuit, the same malfunction occurs in the entire LED module, causing pedestrian confusion due to abnormal signal expression. There was a serious problem.

In the present invention, in order to solve the problem of the prior art, the LED driving unit 63 constituting the control unit 60 is configured as follows.

As shown in FIG. 1, the LED driving unit 63 is a component of a control unit mounted below the LED light emitting unit,

20 to 34, a driving signal input unit 63a for floor-type walking traffic lights, a voltage sensing drop unit 63b, a red signal dimmer control forward direction control circuit unit 63c, and a green signal dimmer control forward direction control circuit unit ( 63d), red signal dimmer control reverse control circuit part 63e, green signal dimmer control reverse control circuit part 63f, green signal constant current IC part 63g, red signal constant current IC part 63h, step-down IC part 63i , a green LED waveform detection unit 63j, a red LED waveform detection unit 63k, and an LED driving control unit (MCU) 63l.

Hereinafter, elements constituting the LED driving unit 63 will be described in detail along with drawings.

<Drive signal input unit 63a for floor-type walking traffic lights>

As shown in FIG. 22, the driving signal input unit 63a for the floor-type walking traffic light is connected to the walking traffic light control unit, and generates a green dimming signal (G_DIM) according to the driving of the main power supply (+24V) and the ground (GND) and the walking traffic light. or a red dimming signal R_DIM.

<Voltage sensing drop unit 63b>

As shown in FIG. 23, the voltage sensing drop unit 63b uses the power supply (+24V) through a sensing resistor so that the LED driving control unit (MCU) can determine whether the power supply (+24V) is connected in the forward direction or in the reverse direction. ) to +5V, and then transmits it to the LED drive control unit (MCU).

Here, it is connected to pin 8 of the LED driving control unit (MCU).

That is, when +5V is input to the 8th pin of the LED driving control unit (MCU), 0V is output to the 5th pin of the LED driving control unit (MCU) so that the walking signal LED display unit operates in the forward direction.

Then, when 0V is input to the 8th pin of the LED driving control unit (MCU), +5V is output to the 5th pin of the LED driving control unit (MCU) so that the walking signal LED display unit operates in the reverse direction.

<Red signal dimmer control forward direction control circuit (63c)>

As shown in FIGS. 24 and 35, the red signal dimmer control forward control circuit unit 63c sets the dimmer control direction of the red signal to red when the power supply (+24V) of the driving signal input unit for the floor-type walking traffic light is connected in the forward direction. It serves as a forward control to send a red signal (R_DIM) drive signal to the constant current IC for red signal so that the signal is driven.

<Green signal dimmer control forward direction control circuit (63d)>

As shown in FIG. 25, in the green signal dimmer control forward direction control circuit unit 63d, the green signal drives the dimmer control direction of the green signal when the power source (+24V) of the driving signal input unit for the floor-type walking traffic light is connected in the forward direction. It plays the role of forward control by sending the green signal (G_DIM) driving signal toward the constant current IC part for the green signal as much as possible.

<Red signal dimmer control reverse direction control circuit (63e)>

As shown in FIGS. 26 and 36, the red signal dimmer control reverse control circuit unit 63e sets the dimmer control direction of the red signal to ground when the power supply (+24V) of the driving signal input unit for floor-type walking traffic lights is connected in the reverse direction. Along with the output, it serves as a reverse direction control by sending a reverse signal to the dimming control signal line (R_DIM) of the driving signal input for floor-type walking traffic lights.

That is, even if a short circuit occurs between the signal lines, the signal flowing in the reverse direction is applied to the secondary signal line of the walking signal LED displaying unit, so that the LED driving of the walking signal LED displaying unit is not affected.

Due to this, when the dimming control signal line (R_DIM) is shorted, it is easy to identify the location where the problem occurs, and the walking signal LED display units before the location where the problem occurs are configured to allow normal operation.

<Green signal dimmer control reverse control circuit (63f)>

As shown in FIG. 27, the green signal dimmer control reverse control circuit unit 63f controls the dimmer control direction of the green signal together with the ground output when the power supply (+24V) of the driving signal input unit for the floor-type walking traffic light is connected in the reverse direction. , It serves as a reverse direction control by sending a reverse signal to the dimming control signal line (G_DIM) of the driving signal input unit for floor-type walking traffic lights.

That is, even if a short circuit occurs between the signal lines, the signal flowing in the reverse direction is applied to the secondary signal line of the walking signal LED displaying unit, so that the LED driving of the walking signal LED displaying unit is not affected.

Due to this, when the dimming control signal line (G_DIM) is shorted, it is easy to identify the location where the problem occurs, and the walking signal LED display units before the location where the problem occurs are configured to allow normal operation.

<Constant current IC for green signal (63g)>

As shown in FIG. 28, the green signal constant current IC unit 63g receives the green signal (G_DIM) drive signal from the green signal dimmer control forward control circuit unit, adjusts the current along with the frequency adjustment, and then adjusts the walking signal LED. It serves to output the green signal (G_DIM) driving signal toward the G_LED - terminal of the display part.

It consists of a constant current IC.

That is, the frequency is adjusted to a maximum of 300 kHz through the sensing resistor R22, and the current is adjusted through the sensing resistors R18 and R19.

Then, the green signal (G_DIM) driving signal is input from the green signal dimmer control forward control circuit part to the PWM_D terminal, and the green signal (G_DIM) driving signal is output to the G_LED-terminal of the walking signal LED display part to the DRAIN output terminal.

<Constant current IC for red signal (63h)>

As shown in FIG. 29, the red signal constant current IC unit 63h receives the red signal (R_DIM) drive signal from the red signal dimmer control forward control circuit unit, adjusts the current along with the frequency adjustment, and then adjusts the walking signal LED. It serves to output the red signal (R_DIM) driving signal toward the R_LED - terminal of the display part.

It consists of a constant current IC.

That is, the frequency is adjusted to a maximum of 300 kHz through the sensing resistor R23, and the current is adjusted through the sensing resistors R20 and R21.

Then, the red signal (R_DIM) driving signal is input from the red signal dimmer control forward control circuit part to the PWM_D terminal, and the red signal (R_DIM) driving signal is output to the R_LED-terminal of the walking signal LED display part to the DRAIN output terminal.

<Step-down IC unit 63i>

As shown in FIG. 30, the step-down IC unit 63i serves to convert the power supply (+24V) to +5V and then transfer the power to the LED driving control unit (MCU).

<Green LED waveform detection unit (63j)>

As shown in FIG. 31, the green LED waveform detection unit 63j is connected to the green LED minus (-) terminal output from the green signal constant current IC unit and detects the waveform expressed from the green LED minus (-) terminal. It detects for what period of time it is not turned on or is continuously turned on, and transmits it to the LED driving control unit (MCU).

That is, the waveform expressed at the minus (-) terminal of the green LED output from the constant current IC for green signal is detected, and the LED drive control unit (MCU) No. 2 detects the green LED for this waveform and determines how long it is not turned on or is continuously turned on. If a problem occurs by detecting it, +5V is output to pin 4 of the LED driving control unit (MCU) to turn off the display unit, and when a problem occurs, it is configured to turn on the warning LED.

<Red LED Waveform Detector (63k)>

As shown in FIG. 32, the red LED waveform detection unit 63k is connected to the red LED minus (-) terminal output from the red signal constant current IC unit and detects the waveform expressed from the red LED minus (-) terminal. It detects for what period of time it is not turned on or is continuously turned on, and transmits it to the LED driving control unit (MCU).

That is, the waveform expressed at the minus (-) terminal of the red LED output from the constant current IC for red signal is detected, and the LED drive control unit (MCU) No. 3 detects the RED LED and determines how long it is not turned on or is continuously turned on. If a problem occurs by detecting it, +5V is output to pin 4 of the LED driving control unit (MCU) to turn off the display unit, and when a problem occurs, it is configured to turn on the warning LED.

<LED driving control unit (MCU) (63l)>

As shown in FIG. 33, the LED driving control unit (MCU) 63l detects the green LED minus (-) terminal and the red LED minus (-) terminal input through the green LED waveform sensing unit and the red LED waveform sensing unit. It detects how long it is not turned on or is continuously turned on, turns off the LED of the walking signal LED display unit, and controls the warning LED unit 63l-1 shown in FIG. 34 to turn on.

It consists of a control IC.

That is, the green LED waveform detection unit is connected to the AN5/RESET terminal, the green LED minus (-) terminal is detected and the detected signal is input, and the red LED waveform detection unit is connected to the AN4 input terminal, the red LED is minus (-) The signal detected by detecting the terminal is input, and the warning LED part is connected to the AN6 output terminal, and the warning LED lighting signal is output toward the warning LED part.

As such, the driving signal input unit 63a for the floor-type walking traffic light, the voltage sensing drop unit 63b, the red signal dimmer control forward direction control circuit unit 63c, the green signal dimmer control forward direction control circuit unit 63d, and the red signal dimmer control reverse direction Control circuit part (63e), green signal dimmer control reverse control circuit part (63f), green signal constant current IC part (63g), red signal constant current IC part (63h), step-down IC part (63i), green LED waveform detection part (63j) ), the red LED waveform sensing unit 63k, and the LED driving control unit (MCU) 63l, the LED driving unit 63 is driven as follows.

That is, the DIM_R/G signal line connected to the constant current IC unit 63g for the green signal and the constant current IC unit 63h for the red signal adopts a redundant configuration using a photocoupler, so that the part where all the existing signal lines are connected in parallel is photo-coupled. The secondary signal generated through the coupler is used as an LED operating signal, and this secondary signal is transmitted to the next walking signal LED display unit through a directional circuit.

Through this, even if a short between the signal lines occurs, the signal flowing in the reverse direction is applied to the secondary signal line of the walking signal LED display unit, so that the LED driving of the walking signal LED display unit is not affected.

Based on the configuration as described above, when the dimming control signal line (DIM_R/G) is shorted, it is easy to identify the location of the problem, and it is possible to configure the walking signal LED display units before the location of the problem to operate normally.

In addition. Likewise, even in the case of a short circuit between the dimming control signal line and the ground line (DC-), the voltage drop of the dimming control signal due to the short circuit also has an insulated effect so that the primary signal line of the walking signal LED display part is not affected, so that between the signal line and the ground line Even in a short-circuit situation, the display unit on the potential side of the problem area can operate normally.

This enables the normal operation of the walking signal LED display unit according to the same principle even in the situation of a signal line-power line (DC+) short circuit.

And, in the case of a short between signal line and ground line, the LED affected by the problem turns off due to the voltage drop of the dimming control signal, but in the case of a short between signal line and power line, both red and green colors of the LED affected by the problem turn on. There is a problem being

As the floor-type walking traffic light auxiliary device is a device that provides visual information directly to crosswalk users at the pedestrian traffic light installation site, the expression of abnormal colors can be a very serious problem, so it detects that two DIM_G/R signals are applied at the same time By adding a circuit that turns off all the LEDs of the corresponding display unit when two color signals are simultaneously applied, and additionally configures a circuit that turns on only the fault display LED, a function to block the transmission of incorrect visual information is implemented.

In addition, the walking signal LED display unit of the floor-type walking traffic light auxiliary device has an installation direction of the display unit because the LED lighting angle is designed to be tilted by 10 degrees toward the sidewalk.

As described above, the walking signal LED display unit of the floor-type walking traffic light auxiliary device must be operable even when power is applied from either the left or right side of the display unit.

This is a concept that is opposed to the implementation of the directionality of the signal line in the circuit of the present invention. To solve this problem, it is configured to first pass through a circuit that converts input power into operating power inside the display unit, which is a general bridge diode configuration. While configured to be operable even when the polarity of the input power is switched, a voltage sensing circuit of the input DC+ line of the bridge diode potential is additionally configured, and the secondary signal line is configured with two circuits having different directions.

Through this, the directivity of the display unit can be physically changed only by changing the power polarity of the control unit.

The present invention provides an effect of reducing the amount of light on the road side and preventing glare by supplementing the technology of the applicant's prior registered patent No. 10-2285404 (registration date July 28, 2021), and external foreign substances such as snow or sand on the surface It is possible to provide a floor-type walking traffic light with a special protection block, which is characterized in that it can maintain the convex structure of the surface even in a covered situation, and it is possible to prevent abnormal signal expression in case of physical abnormality of the line and to intuitively determine the location of the fault. It has high industrial applicability because it can provide a high-functional floor-type walking traffic light as much as possible.

1: Floor type pedestrian traffic light
10: lower case
20: 1st block
30: LED light emitting part
40: 2nd block
50: upper case
60: control unit
61: control module
62: power supply
63: LED driving unit
101: pressure reduction auxiliary hole
102: internal and external pressure reduction hole
63a: drive signal input unit for floor-type walking traffic lights
63b: voltage sensing drop
63c: red signal dimmer control forward control circuit unit
63d: green signal dimmer control forward control circuit part
63e: red signal dimmer control reverse control circuit unit
63f: green signal dimmer control reverse control circuit unit
63g: constant current IC part for green signal
63h: constant current IC part for red signal
63i: step-down IC unit
63j: green LED waveform detection unit
63k: red LED waveform detection unit
63l: LED drive control unit (MCU)

Claims (8)

As a traffic light embedded at a predetermined depth in the road surface on a crosswalk installed on the road,
A plurality of internal pressure reducing auxiliary holes 101 for adjusting the air pressure in the internal space formed through coupling with the first block, and internal and external pressure A lower case 10 including a reduction hole 102,
The first block 20 of the filling block forming a space of a predetermined width in the upper direction of the lower case 10 by wrapping and combining the lower case 10 as a whole, the upper surface forming an inclined surface;
An LED light emitting unit 30 installed to be seated on the upper surface of the first block 20 and installed to have an inclination of 10 ° to 15 ° in the direction of India based on the horizontal line;
By covering the LED light emitting part 30 as a whole, the decrease in light amount due to the inclination of the LED light emitting part 30 is minimized, and the pedestrian maintains color visibility regardless of the gaze angle, and the light amount is reduced and the glare is prevented on the side of the road The second block 40 of the LED lens protection block having a function of increasing the LED light emitting part and overall load capacity and increasing the impact resistance of the weak part of the upper case while having a
While covering the lower case 10, the first block 20, the LED light emitting part 30, and the second block 40 as a whole, walking in a state in which a protrusion 51 including a plurality of main protrusions and auxiliary protrusions is formed on the upper surface. An upper case 50 constituting an expression portion 52 through which signals are expressed;
In the floor-type walking signal light including a control unit 60 for controlling the walking signal expression through the LED light emitting unit 30,
The second block 40,
A plurality of LED main air circulation holes 401 and auxiliary air circulation holes 402 are formed in pairs to prevent moisture of the plurality of LED lenses 301 installed on the upper surface of the LED light emitting unit 30, The LED main air circulation hole 401 has a penetrating structure with the LED lens 301, including improved impact resistance, anti-glare effect on the road side, improved visibility of walking signal and prevention of abnormal expression of the walking signal display part. High-functional floor-type pedestrian traffic light.




delete delete The method of claim 1,
The LED main air circulation hole 401 extends to the part where the LED lens 301 is installed and is formed through,
The inner surface of the point facing the LED lens 301 is spaced apart from the LED lens 301 by a predetermined width to form a radial curved lens structure, so that the LED light emitting unit is inclined at an angle of 10 ° to 15 ° in the direction of India Improving impact resistance, characterized in that it is configured to maintain clear visibility of the LED lens 301 even at an inclined angle of (30) and to minimize glare for drivers on the road side by achieving diffuse reflection in the direction of the road side, A high-functional floor-type walking signal light that includes the effect of preventing glare on the side of the road, improving the visibility of walking signals, and preventing abnormal expression of the walking signal display part.
The method of claim 1,
The LED main air circulation hole 401 extends to the part where the LED lens 301 is installed and is formed through,
A prism lens unit (a1) and a curved lens unit for maintaining visibility of the LED lens 301 whose inner surface (A) at the point facing the LED lens 301 is inclined at an angle of 10° to 15° toward the side of India. (a2) is a high-functional floor-type walking signal light including improvement of impact resistance, anti-glare effect on the side of the road, improvement of visibility of walking signal, and prevention of abnormal expression of the walking signal display part, characterized in that (a2) is continuous and integral.




delete delete The method of claim 1,
The control unit 60 includes a control module 61, a power supply unit 62 for supplying power to the control module, and an LED driving unit 63 for driving the LED light emitting unit according to the control signal of the control module 61. As doing
The LED driver 63 is
It is connected to the walking traffic light control unit and receives power (+24V) and ground (GND) according to the driving of the walking traffic light and either green dimming signal (G_DIM) or red dimming signal (R_DIM) according to the driving of the walking traffic light. A drive signal input unit 63a for a floor-type walking traffic light that performs
After dropping the voltage from the power supply (+24V) to +5V through the sensing resistor so that the LED driving control unit (MCU) can determine whether the power supply (+24V) is forward or reverse connection, the LED driving control unit (MCU) A voltage sensing drop unit 63b for transmitting;
When the power supply (+24V) of the drive signal input unit for floor-type walking traffic lights is connected in the forward direction, it plays a forward control role by sending the red signal (R_DIM) drive signal to the constant current IC for the red signal so that the red signal is driven in the dimmer control direction of the red signal. A red signal dimmer control forward control circuit 63c for
When the power supply (+24V) of the drive signal input for floor-type walking traffic lights is connected in the forward direction, it plays a forward control role by sending the green signal (G_DIM) driving signal to the constant current IC for the green signal so that the green signal is driven in the dimmer control direction of the green signal. A green signal dimmer control forward control circuit part 63d to do,
When the power supply (+24V) of the drive signal input for floor type walking traffic lights is connected in the reverse direction, the dimmer control direction of the red signal is applied to the dimming control signal line (R_DIM) of the drive signal input for floor type pedestrian traffic lights along with the ground output. A red signal dimmer control reverse control circuit 63e serving as a reverse control for sending;
When the power supply (+24V) of the drive signal input for floor type walking traffic lights is connected in the reverse direction, the dimmer control direction of the green signal is applied to the dimming control signal line (G_DIM) of the drive signal input for floor type pedestrian traffic lights along with the ground output. A green signal dimmer control reverse control circuit 63f serving as a reverse control for transmission;
Receives the green signal (G_DIM) driving signal from the green signal dimmer control forward control circuit unit, adjusts the current along with the frequency adjustment, and then outputs the green signal (G_DIM) driving signal toward the G_LED -terminal of the walking signal LED display part. A constant current IC unit (63g) for a green signal to
For the red signal that receives the red signal (R_DIM) drive signal from the red signal dimmer control forward control circuit unit, adjusts the current along with the frequency adjustment, and outputs the red signal (R_DIM) drive signal toward the R_LED -terminal of the walking signal LED display unit. a constant current IC section 63h;
A step-down IC unit 63i that converts the power supply (+24V) to +5V and transmits it to the LED driving control unit (MCU);
It is connected to the green LED minus (-) terminal output from the constant current IC for green signal, detects the waveform expressed from the green LED minus (-) terminal, detects how long it is not turned on or is continuously turned on, and LED driving control unit ( A green LED waveform detecting unit 63j for transmitting to the MCU);
It is connected to the red LED minus (-) terminal output from the constant current IC for red signal, detects the waveform expressed from the red LED minus (-) terminal, detects how long it is not turned on or is continuously turned on, and LED driving control unit ( A red LED waveform detection unit 63k for transmitting to the MCU);
By detecting the green LED minus (-) terminal and the red LED minus (-) terminal input through the green LED waveform detection unit and the red LED waveform detection unit, it detects how long it is not turned on or whether it is continuously turned on, Improved impact resistance, anti-glare effect on the road side, improved visibility of walking signal and walking signal display unit, characterized in that it consists of a LED driving control unit (MCU) (63l) that turns off the LED and controls to turn on the warning LED unit. A high-functional floor-type walking traffic light that includes the effect of preventing abnormal exposure.

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