KR20190015158A - Smart road advertising video output device - Google Patents

Abstract

The present invention discloses a smart road advertising video output device capable of outputting and exposing an advertisement image on a road around a crosswalk without failure or malfunction caused by external environment factors such as rain, wind, snow, or humidity, or physical environment factors such as heat generated from a vehicle and geothermal heat while using a beam projector. The smart road advertising video output device includes: a case having a video output hole and manufactured in a watertight structure so that rain or snow does not penetrate into the inside from the outside; a beam projector mounted inside the case and outputting an image to the outside of a case body through the video output hole; a heat exchanging unit installed in the case such that a part of the heat exchanging unit is located in the case and the remaining part of the heat exchanging unit is located out of the case to cool the inside of the case by discharging the internal heat of the case generated when the beam projector is operated; and at least one moisture control unit installed in the case for discharging the moisture inside the case to the outside of the case and preventing water outside the case from flowing into the case.

Description

[0001] SMART ROAD ADVERTISING VIDEO OUTPUT DEVICE [0002]

The present invention relates to a smart road advertisement apparatus, and more particularly, to a smart road advertisement image output apparatus capable of transmitting an image including an advertisement or a public interest phrase to a pedestrian or a vehicle driver waiting on a crosswalk .

Generally, a roadway is provided with a pedestrian crossing at predetermined intervals so that a pedestrian can cross the roadway, a pedestrian can be safely crossed by using a pedestrian crossing on a road provided with the pedestrian crossing, Traffic lights that indicate traffic conditions in color are installed so that the vehicle can be operated safely.

In this way, a traffic light installed on a pedestrian crossing usually means a signal for stopping without walking when a red light is on, and a signal for a pedestrian to walk on a pedestrian crossing when a green light is on.

Therefore, when the red light of a traffic light is turned on, a lot of pedestrians waiting at the both ends of the crosswalk are waiting for the green light to turn on to cross the roadway through the crosswalk, and the green light of the traffic light is turned on When pedestrians are waiting in India at both ends of the crosswalk, they walk across the crosswalk and cross the roadway.

On the other hand, drivers who drive the vehicle on the road watch the traffic light on the road where the crosswalk is provided, and when the red light of the traffic light on the road is lit, the vehicle is stopped on the stopwatch provided on both sides of the crosswalk Pedestrians can safely cross the roadway through the crosswalk, and if the traffic lights are lit green, they will cross the crosswalk.

Around the crosswalk, there are many pedestrians or pedestrians crossing the pedestrian crossing, or waiting in India, or pedestrians crossing the pedestrian crossing, many vehicles stop at the pedestrian crossing stop line. At this time, most of the pedestrians and drivers I wasted my time indefinitely.

Therefore, in order to expose the advertisement to the pedestrian waiting on the pedestrian crossing, a method of exposing the advertisement to the pedestrian or the driver by putting the advertisement phrase in the pedestrian crossing near the pedestrian crosswalk has been developed and used. However, When finished, new paint is applied to put new advertisement texts, and there is a problem that replacement of advertisement texts is troublesome and the advertising expression method to be transmitted to the public is limited to pictures or characters, .

Recently, an advertisement system such as a beam projector is used to develop an advertisement system in which an advertisement or an advertisement phrase is transmitted to a pedestrian or a driver by investigating an image including various advertisements or public utterances on a crosswalk However, in the case of an advertisement image output device such as the above-mentioned beam projector, if it is installed outdoors, it is caused by external environmental factors such as rain, wind, snow, humidity and physical environment factors such as heat and geothermal heat There is a problem in that it is applied to an advertisement system installed outdoors and thus it is not used.

Korean Patent Publication No. 2012-0013688 (Feb. 15, 2012)

It is an object of the present invention to provide a method and apparatus for controlling a light source on a road near a pedestrian crossing without causing a fault or malfunction due to external environmental factors such as rain, wind, snow, humidity, A smart road advertisement image output device capable of outputting and exposing an advertisement image is provided.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

According to an aspect of the present invention, there is provided an image display apparatus including a case having a video output hole, which is manufactured to be watertight so that rain and snow are not penetrated from the outside, And a heat radiating unit for radiating heat from the inside of the case to the outside of the case, the heat being generated in response to operation of the beam projector, And at least one moisture control unit installed in the case for discharging the moisture inside the case to the outside of the case and preventing the water outside the case from flowing into the case, A video output device is presented.

For example, the case may include a main body portion formed with at least one surface to be opened and provided with the image output hole, at least one cover detachably coupled to the main body portion to open and close the opened surface of the main body portion, Section.

Here, the case is preferably made of a heat dissipation material.

For example, the heat exchange unit may include a heat pipe, which is disposed inside the case and a part of which is disposed outside the case, to transfer heat inside the case to the outside of the case, and a heat pipe A heat radiating plate installed in the case and radiating heat inside the case to the outside of the case, the heat being transferred to the outside of the case by the heat pipe; and a heat pipe arranged inside the case, A first fan disposed inside the case so as to transmit heat to the heat pipe and a heat radiating plate disposed outside the case to bring the outside air into contact with the heat pipe and the heat radiating plate, Cooling can increase the heat dissipation efficiency. And a second fan disposed outside the case.

For example, the moisture control unit may include a coupling hole provided in the case, a coupling cap closely attached to the case and coupled to the coupling hole so as to be detachable, and having a moisture discharge hole communicating the inside of the case and the outside of the case, And a moisture discharging member coupled to the tightening cap so as to close the moisture discharging hole so that moisture in the case can be discharged to the outside of the case through the moisture discharging hole and water outside the case can not be introduced into the case .

The moisture control unit may further include watertight means interposed between the case and the coupling cap.

Here, the moisture discharging member may be a gore-tex.

Further, the present invention may further include a control unit for detecting the temperature inside the case and stopping the operation of the beam projector when the temperature inside the case reaches a set temperature or more.

For example, the control unit may include a temperature sensing sensor disposed inside the case and sensing a temperature inside the case, and a control unit for comparing the temperature inside the case detected by the temperature sensing sensor with a previously set temperature, The control unit may stop the operation of the beam projector if it is determined that the temperature is higher than a preset temperature.

Further, the present invention may further include a communication unit connected to the beam projector to transmit the advertisement image from the server to the beam projector.

In addition, the image forming apparatus may further include a storage unit connected to the beam projector for inputting and reproducing the stored advertisement image.

As described above, the smart road advertisement apparatus according to an embodiment of the present invention is installed in a case where the beam projector is watertight, thereby protecting the beam projector from rain, snow, etc., It can be exposed on the road such as around the crosswalk and exposed.

In addition, since the beam projector is mounted inside a case made of a heat dissipation material, and the heat generated inside the case generated by the operation of the beam projector by the heat exchanging unit is effectively cooled, geothermal heat and automobile exhaust heat are added, Can be installed outdoors without malfunction or failure of Edo-beam projector.

On the other hand, in the case of the above-mentioned beam projector, when the temperature inside the case does not fall below the set temperature, it is stopped by the control unit so that the failure occurrence rate can be further reduced, So that the cooling efficiency can be further reduced and the maintenance cost can be reduced.

In addition, the smart road advertisement apparatus according to an embodiment of the present invention includes a moisture regulating unit including a moisture discharging member such as Gore-Tex that discharges moisture inside the case to the outside and prevents water outside the case from flowing into the case. The temperature difference between the inside and the outside of the case is generated due to the environmental conditions such as rain. Therefore, even if moisture is generated inside the case, moisture inside the case is prevented from flowing into the case, Thereby making it possible to minimize the occurrence of a failure of the beam projector due to moisture.

Therefore, the smart road advertisement apparatus according to an embodiment of the present invention can be used for a variety of applications, such as a rain or snowy day or a very hot summer season, without being influenced by external environment factors or physical environment factors, The advertisement image can be displayed on the roads around the pedestrian crossing by the size and angle, so that it is possible to expose the advertisement to the pedestrian or the driver passing around the pedestrian crossing, thereby further improving the advertisement effect. It is possible to greatly reduce the maintenance / repair cost, and it is also very easy to install.

The effects of the present invention will be clearly understood and understood by those skilled in the art, either through the specific details described below, or during the course of practicing the present invention.

1 is a perspective view of a smart road advertisement apparatus according to an embodiment of the present invention;
2 is a perspective view of another embodiment of a smart road advertisement apparatus according to an embodiment of the present invention.
3 is a cross-sectional view for explaining an internal configuration of a smart road advertisement apparatus according to an embodiment of the present invention;
4 is a view showing a state in which a smart road advertisement apparatus according to an embodiment of the present invention is installed on a support

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the following description. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprising" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted as ideal or overly formal in meaning unless expressly defined in the present application Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a perspective view of a smart road advertisement apparatus according to an embodiment of the present invention, FIG. 2 is another perspective view of a smart road advertisement apparatus according to an embodiment of the present invention, and FIG. Sectional view for explaining the internal configuration of the smart road advertisement device.

1 to 3, a smart road advertisement apparatus 100 according to an embodiment of the present invention includes a case 110, a beam projector 120, a heat exchange unit 130, a moisture control unit 140, . ≪ / RTI >

The case 110 may be manufactured to be watertight so that rain or snow does not penetrate from the outside, and a video output hole 111a may be provided.

On the other hand, the image output hole 111a may be sealed by providing transparent glass, acryl, or the like.

Here, it is preferable that the heat generated inside the case 110 due to the operation of the beam projector 120 is made of a heat dissipation material such as aluminum to more easily dissipate heat to the outside of the case 110.

For example, the case 110 may include a body portion 111 and a cover portion 112.

The main body 111 is formed to open at least one surface thereof and the image output hole 111a may be provided.

The cover 112 may be detachably coupled to the main body 111 to close the open side of the main body 111.

Here, the cover 112 may be detachably coupled to the main body 111 by a fixing member 113 such as a bolt.

Alternatively, the cover portion 112 may be hinged to the main body 111 so as to open and close the opened surface of the main body 111, though not shown in the figure.

The beam projector 120 is mounted inside the case 110 to output an image to the outside of the case 110 through the image output hole 111a.

Here, as the beam projector 120, it is preferable to use a beam projector 120 capable of inputting and reproducing an advertisement image through a portable storage device storing an advertisement image.

The heat exchanging unit 130 may be installed in the case 110 such that the heat exchanging unit 130 is partially disposed inside the case 110 and a part of the heat exchanging unit 130 is located outside the case 110, So that heat inside the case 110 can be discharged to the outside of the case 110 to cool the inside of the case 110.

For example, the heat exchange unit 130 may include a housing 131, a heat pipe 132, a heat sink 133, a first fan 134, and a second fan 135.

The housing 131 may be installed in the case 110 such that both sides of the housing 131 are opened to open and some of the opened sides of the housing 131 are disposed inside the case 110 and the remaining portions are disposed outside the case 110.

The heat pipe 132 is disposed inside the housing 131 such that a part of the heat pipe 132 is located inside the case 110 and the remaining part of the heat pipe 132 is located outside the case 110, ) To the outside.

The heat dissipating plate 133 is installed in a heat pipe 132 located outside the case 110 and transfers heat inside the case 110 to the outside of the case 110 through the heat pipe 132, So that it can be radiated into the outside air.

The first fan 134 is installed in a housing 131 disposed inside the case 110 so that the heated air inside the case 110 passes through the housing 131 disposed inside the case 110 So that the heated air inside the case 110 can be brought into contact with the heat pipe 132 disposed inside the case 110 to be heat-transferred.

The second fan 135 is installed in a housing 131 disposed outside the case 110 to move the air outside the case 110 through the housing 131 disposed outside the case 110 The heat pipe 132 and the heat sink 133 are brought into contact with the heat pipe 132 and the heat sink 133 to cool the heat pipe 132 and the heat sink 133,

The first fan 134 and the second fan 135 may be connected to a control unit 150 to be described later so that the rotational speed of the first fan 134 and the second fan 135 may be controlled by the control unit 150.

The temperature of the inside of the case 110 is sensed by the temperature sensor 151 of the control unit 150 and the temperature of the inside of the case 110 is detected by the control unit 152 The control unit 152 determines that the temperature inside the case 110 sensed by the temperature sensor 151 is equal to or higher than the predetermined temperature, the first fan 134 and the second fan The controller 140 controls the rotation speed of the first fan 134 so that the rotation speed of the first fan 134 is higher than the set rotation speed. If it is determined that the temperature inside the case 110 sensed by the temperature sensor 151 is lower than the preset temperature, And the rotation speed of the second fan 135 can be adjusted to be lower than the set rotation speed.

The moisture control unit 140 is installed in the case 110 so that moisture inside the case 110 is discharged to the outside of the case 110 and water outside the case 110 flows into the case 110 It does not function.

For example, the moisture conditioning unit 140 may include a fastening hole 141, a fastening cap 142, and a moisture discharge member 143.

The fastening holes 141 may be formed in the case 110.

The fastening cap 142 may be detachably fastened to the fastening hole 141 so as to be in close contact with the case 110.

For example, the fastening cap 142 may be fastened to the fastening hole 111 in a detachable manner.

A watertight means 144 is interposed between the case 110 and the fastening cap 142 to allow the space between the case 110 and the fastening cap 142 to pass from the outside of the case 110 to the inside of the case 110 Water can be prevented from permeating.

The coupling cap 142 may be provided with a moisture discharge hole 145 for communicating the inside of the case 110 with the outside of the case 110.

The moisture discharging member 143 is coupled to the coupling cap 142 so as to block the moisture discharging hole 145 so that the moisture inside the case 110 flows into the case 110 through the moisture discharging hole 145. [ So that the water outside the case 110 can not be introduced into the case 110. [

For example, it is preferable to use Gore-Tex as the moisture discharging member 143.

In addition, the smart road advertisement image output apparatus 100 according to an embodiment of the present invention may further include a control unit 150.

The control unit 150 detects the temperature inside the case 110 and stops the operation of the beam projector 120 when the temperature inside the case 110 becomes the set temperature or more.

For example, the control unit 150 may include a temperature sensing sensor 151 and a control unit 152.

The temperature sensor 151 is disposed inside the case 110 to detect a temperature inside the case 110.

The control unit 152 compares the temperature inside the case 110 sensed by the temperature sensor 151 with the predetermined temperature and determines that the temperature inside the case 110 is higher than the pre- Thereby stopping the operation of the battery 120.

Meanwhile, the controller 152 may be connected to the first fan 134 and the second fan 135.

Accordingly, if it is determined by the controller 152 that the temperature inside the case 110 is higher than the pre-set temperature, the rotational speeds of the first fan 134 and the second fan 135 are set to be equal to or higher than the set rotational speed It is possible to control the first fan 134 and the second fan 135. If it is determined that the temperature inside the case 110 is lower than the predetermined temperature, the first fan 134 and the second fan 135 To control the first fan 134 and the second fan 135 such that the rotation speed of the first fan 134 is equal to or less than the set rotation speed.

In addition, the smart road advertisement image output apparatus 100 according to an embodiment of the present invention may further include a communication unit 160.

The communication unit 160 may be connected to the beam projector 120 and may receive an advertisement image through wire / wireless communication from a server (not shown) and transmit the advertisement image to the beam projector 120 to reproduce the advertisement image.

In addition, the smart road advertisement image output apparatus 100 according to an embodiment of the present invention may further include a storage unit 170. [

The storage unit 170 may be connected to the beam projector 120 to input and store the stored advertisement image.

In addition, the smart road advertisement apparatus 100 according to an embodiment of the present invention may further include a clamping unit 180. [

The configuration of the clamping means will be described with reference to Fig.

4 is a view showing a state in which a smart road advertisement apparatus according to an embodiment of the present invention is installed on a support.

Referring to FIG. 4, the clamping unit 180 may be configured such that the smart road advertisement apparatus 100 according to an embodiment of the present invention is detachably clamped to a support 200 such as a lamp stand, a streetlight support, .

For example, the clamping means 180 may include a body portion 181, a clamping member 182, and a fixing member 183 '.

The case 110 may be hinged to the main body 181 so that the case 110 can be angularly adjusted.

The clamping member 182 is arc-shaped so as to be in close contact with the outer circumferential surface of the support table 200, and a pair of the clamping member 182 can be hinged to the main body 181 so as to be rotatable.

At least one protrusion 182a may protrude from the inner circumferential surface of the clamping member 182 to prevent the clamping member 182 from sliding along the support.

In addition, the clamping member 182 may be provided with a coupling hole 182b.

The clamping member 182 can be fixed to the support base 200 by coupling a pair of clamping members 182 whose inner circumferential surfaces are closely attached to the outer circumferential surface of the support base 200.

For example, the fixing member 183 may include a bolt passing through a coupling hole provided in a pair of clamping members 182 closely attached to the outer peripheral surface of the support base 200, Nuts.

[0030] Again, the operation and effect of the smart road advertisement apparatus according to the embodiment of the present invention will be described with reference to FIG. 1 to FIG.

1 to 4, the smart road advertisement apparatus 100 according to an embodiment of the present invention is configured such that the beam projector 120, which is vulnerable to rain, snow, or geothermal heat or heat generated in a vehicle, And is mounted inside the case 110.

Accordingly, the smart road advertisement apparatus 100 according to an embodiment of the present invention is installed in various supports 200 such as a streetlight support, a traffic light support, a telephone pole, etc. installed on the road, The failure or malfunction of the beam projector 120 does not occur due to external environmental factors such as snow, humidity, and physical environmental factors such as heat and geothermal heat generated by the vehicle.

Particularly, in the case of the beam projector 120, if the cooling operation is not performed properly during operation due to a very weak heat, a phenomenon that fixing occurs or malfunctions occurs very frequently. However, the smart road advertisement apparatus 100 according to an embodiment of the present invention It is possible to cool the inside of the case 110 in which the beam projector 120 is mounted by the heat exchange unit 130 even if the beam projector 120 is mounted inside the watertight case 110, There is an advantage that it can be used outdoors such as around the crosswalk without causing a malfunction or malfunction.

The heat inside the case 110 is transferred to the heat pipe 132 more quickly and efficiently by operating the first fan 134 and discharged to the outside of the case 110, The second fan 135 can be operated by contacting with a larger amount of outside air to greatly improve the cooling efficiency, so that the solar heat, the geothermal heat or the automobile exhaust heat are applied in the summer The beam projector 120 is installed on the pedestrian crossing road smoothly even in a harsh summer environment so that various kinds of advertisement images can be outputted in a desired size through the beam projector 120 so that the advertisement image is displayed on the pedestrian To be exposed to the driver.

In addition, in the case of the first fan 134 and the second fan 135, if the internal temperature of the case 110 is higher than the set temperature according to the internal temperature of the case 110 sensed by the temperature sensor 151 The control unit 152 increases the rotational speed of the first fan 134 and the second fan 135 to a set rotational speed to improve the cooling efficiency and at the same time the inside temperature of the case 110 is lower than the set temperature The rotation speed of the first fan 134 and the rotation speed of the second fan 135 may be lowered by the control unit 152 than the set rotation speed to reduce the maintenance cost.

Meanwhile, the smart road advertisement apparatus 100 according to an embodiment of the present invention is configured such that even when the inside of the case 110 is cooled by the heat exchange unit 130, the temperature inside the case 110 The operation of the beam projector 120 is stopped by the control unit 152 so that a failure occurs due to the heating of the beam projector 120. Thus, .

In addition, the smart road advertisement image output apparatus 100 according to an embodiment of the present invention is configured such that the humidity control unit 140 is installed in the case 110, The moisture inside the case 110 is discharged to the outside of the case 110 through the moisture control unit 140 even if the temperature of the case 110 and the temperature difference outside the case 110 are generated, 110 can be prevented from penetrating into the case 110, thereby minimizing the occurrence of a failure of the beam projector 120 mounted in the case 110 by water or moisture, thereby further improving the service life of the apparatus .

The smart road advertisement apparatus 100 according to an embodiment of the present invention includes a pair of clamping members 182 hinged to the main body 181 for fixing the case 110 to the support base 200, So that it can be mounted on the various supports 200 very easily without regard to the diameter of the support 200.

In addition, the smart road advertisement apparatus 100 according to an embodiment of the present invention is configured such that the case 110 is hinged to the body portion 181 of the clamping means 180 so as to be angularly adjustable, So that the advertisement image can be outputted and exposed.

Therefore, the smart road advertisement apparatus 100 according to the embodiment of the present invention can be installed at a desired place without restriction according to the condition of the installation place, and output the advertisement image on a road located around the crosswalk with a desired angle and a desired size So that it can be exposed to pedestrians or drivers.

As described above, the smart road advertisement apparatus 100 according to an embodiment of the present invention is mounted in the case 110 in which the beam projector 120 becomes watertight, thereby protecting the beam projector 120 from rain, Even if the snow comes, it can be installed outdoors, and the advertisement image can be outputted on the road such as the side of the crosswalk and exposed.

The beam projector 120 is mounted inside the case 110 made of a heat dissipation material and the heat inside the case 110 generated by the operation of the beam projector 120 by the heat exchange unit 130 The geothermal heat and the automobile exhaust heat can be added to the outdoor space without any malfunction or malfunction of the beam projector 120 even in a very hot summer season.

On the other hand, in the case of the beam projector 120, when the temperature inside the case 110 does not drop below the set temperature, the control unit 150 stops the operation so that the failure occurrence rate can be further reduced, The rotational speed of the first and second fans 134 and 135 can be adjusted by the control unit 150 to reduce the maintenance cost as well as the cooling more efficiently.

In addition, the smart road advertisement apparatus 100 according to an embodiment of the present invention discharges moisture inside the case 110 to the outside such as Gore-Tex, and water outside the case 110 flows into the case 110 A temperature difference between the inside and the outside of the case 110 is generated due to an environmental condition such as rain or the like due to the provision of the moisture control unit 140 including the moisture discharge member 143 for preventing the humidity The moisture inside the case 110 can be discharged to the outside of the case 110 while preventing the water outside the case 110 from flowing into the case 110. Thus, Thereby minimizing the occurrence of a fault.

Therefore, the smart road advertisement apparatus 100 according to the embodiment of the present invention can be used for a variety of applications such as a beam projector (or an airplane) without being influenced by external environmental factors or physical environmental factors even on a rain or snowy day, 120), it is possible to display the advertisement image to the pedestrian or the driver passing around the pedestrian crossing by outputting the advertisement image to the road near the pedestrian crossing, so that the advertising effect can be further improved, It is possible to greatly reduce the maintenance / repair cost, and it is also very easy to install.

While the present invention has been described in connection with what is presently considered to be practical and exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

(110): Case (120): a beam projector
(130): Heat exchange unit (140): Moisture adjustment unit
(150): control unit (160): communication unit
(170): storage unit (180): clamping means

Claims (2)

A case which is made watertight so that rain and snow do not penetrate from the outside and has a video output hole;
A beam projector mounted inside the case and outputting an image to the outside of the case body through the video output hole;
A heat exchanging unit installed in the case to partially heat the inside of the case and partially to the outside of the case to cool the inside of the case by discharging the heat inside the case to the outside of the case generated by operation of the beam projector; And
And at least one moisture conditioning unit installed in the case and discharging the moisture inside the case to the outside of the case and preventing the water outside the case from flowing into the case
Smart road advertising video output device.
The method according to claim 1,
And a control unit for detecting the temperature inside the case and stopping the operation of the beam projector when a temperature inside the case becomes a set temperature or more
Smart road advertising video output device.

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