CN206224915U - A kind of electronics Billboard - Google Patents

Abstract

The utility model discloses a kind of electronics Billboard, including panel and housing, panel includes viewing area and image acquisition areas, viewing area is provided with display screen, display screen includes monitor prompt information display area and monitor video broadcast area, camera is provided with image acquisition areas, governor circuit and power circuit are provided with housing, governor circuit is used to receive, stores monitor video and the real-time display monitoring prompt message of control display screen and monitor video.A kind of electronics Billboard camera of the utility model shoots the monitor video in monitor area and sends it to governor circuit, and governor circuit control display screen plays monitor video and monitor prompt information in real time, is informed and publicity so as to play a part of monitored dynamic；The personal privacy right of monitored object is protected, and serves the effect of constraint public arena inappropriate behavior；Meanwhile, the effect for can to a certain extent reach fright crime, diminishing crime.The utility model can be widely applied to monitoring field as a kind of electronics Billboard.

Description

A kind of electronics Billboard

Technical field

The utility model is related to monitoring field, especially a kind of electronics Billboard.

Background technology

At present, install after monitoring camera, usually configure a nameplate to point out people to have been enter into monitoring range, it is existing What is commercially commonly used is all the nameplate such as plastic cement or metal " you come into 24 hours monitor areas ", behind glue Glue with facilitate patch on the wall with miscellaneous equipment on, but due to size, the problem of material, this nameplate exists and easily drops, no The unconspicuous problem in durable, position；Although making the nameplate for nailing firmly, nameplate does not have substantially and is supervised The effect with publicity is known in charge, and the individual privacy of monitored object cannot obtain due protection；The warning function of nameplate is low Under, alarming effect it is poor.

Utility model content

In order to solve the above-mentioned technical problem, the purpose of this utility model be to provide it is a kind of inform monitored effect is significant, The monitoring obvious electronics Billboard of alarming effect.

The technical scheme that the utility model is used is：A kind of electronics Billboard, including panel and housing, the panel bag Viewing area and image acquisition areas are included, the viewing area is provided with display screen, and the display screen includes being used for display monitoring prompt message Monitor prompt information display area and the monitor video broadcast area for playing monitor video, described image is provided with use in acquisition zone In the camera for shooting monitor video, governor circuit and power circuit are provided with the housing, the governor circuit is used to receiving, The storage monitor video and real-time display monitoring prompt message of control display screen and monitor video, the output end of the power circuit with Governor circuit is connected, and the output end of the camera is connected with the input of governor circuit, the output end of the governor circuit and The input connection of display screen.

Further, LED warning lights, output end and the LED warning lights of the governor circuit are additionally provided with the panel Input is connected.

Further, the side of the housing is provided with control button, output end and the governor circuit of the control button Input is connected.

Further, infrared remote-controlled signal receiving circuit is additionally provided with the housing, the infrared remote-controlled signal receives electricity The output end on road is connected with the input of governor circuit.

Further, the side of the housing is provided with interface circuit, output end and the governor circuit of the interface circuit Input is connected, and the interface circuit includes USB interface, HDMI, USB interface, AV interfaces and RJ45 interfaces.

Further, the camera governor motion of the camera angle for adjusting camera, institute are also included in the housing Stating camera governor motion includes the first installed part, the second installed part and the 3rd installed part, first installed part and camera It is fixedly connected, first installed part is rotated with the second installed part by first rotating shaft and is connected, first installed part and second Being rotated with the 3rd installed part entirely through the second rotating shaft for installed part composition is connected, and the first rotating shaft and the second rotating shaft are mutually hung down Directly.

Further, the power circuit includes AC-DC 12V voltage conversion circuits, DC 24V-DC 12V voltage conversions Circuit and single-pole double throw electromagnetic relay, the input connection AC power of the AC-DC 12V voltage conversion circuits, the DC The input connection direct current 24V power supplys of 24V-DC 12V voltage conversion circuits, the output of the AC-DC 12V voltage conversion circuits End be connected with the normally-closed contact of single-pole double throw electromagnetic relay, the output end of the DC 24V-DC 12V voltage conversion circuits and The normally opened contact connection of single-pole double throw electromagnetic relay, output end and the governor circuit of the single-pole double throw electromagnetic relay connect Connect.

Further, the upper and lower part on rear side of the housing is additionally provided with and is respectively used to protection interface circuit and camera Protection cap, rotates connection between the protection cap and housing, so that protection cap has open and close status, in open mode When, there is an angle between protection cap and housing.

Further, VESA wall hanging hole positions are provided with rear side of the housing.

Further, the display screen includes LCDs.

The beneficial effects of the utility model are：A kind of the utility model electronics Billboard built-in high-definition camera and display Screen, the output end of camera is connected with the input of governor circuit, and the output end of governor circuit is connected with the input of display screen, Camera shoots the monitor video in monitor area and sends it to governor circuit, and governor circuit control display screen is played in real time Monitor video and monitor prompt information, when monitored object is by monitor area, the camera that the image of oneself is just built Shoot with video-corder and be displayed on electronics Billboard, while also showing individual characteies such as one group " you come into 24 hours monitor areas " on picture The monitor prompt printed words of change, inform and publicity that monitoring alarming effect is obvious so as to play a part of monitored dynamic；Not only protect The personal privacy right of monitored object, and serve the effect of constraint public arena inappropriate behavior；Simultaneously, it is intended to implement Criminal see oneself be monitored shoot with video-corder in the case of can have certain scruples, so as to terminate or temporarily terminate criminal offence, because This, the effect for can to a certain extent reach fright crime, diminishing crime.

Brief description of the drawings

Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is a kind of structured flowchart of electronics Billboard of the utility model；

Fig. 2 is a kind of structural representation of a specific embodiment of electronics Billboard of the utility model；

Fig. 3 is an a kind of specific embodiment front view of electronics Billboard of the utility model；

Fig. 4 is an a kind of specific embodiment top view of electronics Billboard of the utility model；

Fig. 5 is an a kind of specific embodiment right view of electronics Billboard of the utility model；

Fig. 6 is an a kind of specific embodiment left view of electronics Billboard of the utility model；

Fig. 7 is an a kind of specific embodiment rearview of electronics Billboard of the utility model；

Fig. 8 is a kind of another structural representation of a specific embodiment of electronics Billboard of the utility model；

Fig. 9 is an a kind of specific embodiment structural representation of the camera governor motion of electronics Billboard of the utility model Figure；

Figure 10 is an a kind of specific embodiment upward view of electronics Billboard of the utility model；

Figure 11 is a kind of specific embodiment structured flowchart of power circuit one of electronics Billboard of the utility model.

Specific embodiment

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.

A kind of electronics Billboard, is a kind of structured flowchart of electronics Billboard of the utility model with reference to Fig. 1 and Fig. 2, Fig. 1, Fig. 2 is a kind of structural representation of a specific embodiment of electronics Billboard of the utility model, and electronics Billboard includes the He of panel 1 Housing 2, panel 1 includes viewing area 4 and image acquisition areas 3, and viewing area 4 is provided with display screen, and display screen includes being used for display monitoring The monitor prompt information display area 401 of prompt message and the monitor video broadcast area 402 for playing monitor video, IMAQ The camera for shooting monitor video is provided with area 3, camera carries out IMAQ through image acquisition areas 3, obtains monitoring Video, is provided with governor circuit and power circuit in housing, governor circuit is used to receive, stores monitor video and control display screen reality When display monitoring prompt message and monitor video, the output end of power circuit is connected with governor circuit, the output end of camera with The input connection of governor circuit, the output end of governor circuit is connected with the input of display screen.

When actually used, using the main control chip of MSTAR-6M16 as Master Control Center, it has control aobvious to governor circuit Display screen carries out the function that picture-in-picture shows so that display screen has monitor prompt information display area and monitor video broadcast area；Phase Ying Di, there is the main control chip of picture-in-picture function may also be used for realizing governor circuit for other；And camera is often adopted in practice Realized with high-definition camera, image acquisition areas can be set using a Transparent Parts or on panel in practice a camera hole come Realize so that camera can obtain monitor video by image acquisition areas.

A kind of the utility model electronics Billboard built-in high-definition camera and display screen, camera pass through HDMI holding wires It is connected with governor circuit, the output end of governor circuit is connected with the input of display screen, camera shoots the prison in monitor area Control video simultaneously sends it to governor circuit, and governor circuit control display screen plays monitor video and monitor prompt information in real time, When monitored object is by monitor area, the camera that the image of oneself is just built is shot with video-corder and is displayed in electronics Billboard On, while the personalized monitor prompt printed words such as a group " you come into 24 hours monitor areas " are also shown on picture, so that Play a part of monitored dynamic to inform and publicity；The personal privacy right of monitored object is not only protected, and is served about The effect of beam public arena inappropriate behavior；Simultaneously, it is intended to implement in the case that criminal sees and oneself be monitored and shoot with video-corder Can have certain scruples, so that terminate or temporarily terminate criminal offence, accordingly, it is capable to reach fright crime, the criminal of reduction to a certain extent The effect of crime.

Used as the further improvement of technical scheme, display screen includes LCDs, can be shown on LCDs point Resolution is the high definition image of 1920*1080, and contrast is 1000:1, brightness is 250cd/m2；And the resolution of high-definition camera It is 2,000,000 pixels, the high definition image of 1920*1080 can be exported, high-definition camera and LCDs is combined and cause that monitoring is regarded The image of frequency shows that clearly display effect is good.

As the further improvement of technical scheme, referring to figs. 2 and 3 Fig. 2 is a kind of electronics Billboard of the utility model The structural representation of one specific embodiment, Fig. 3 is an a kind of specific embodiment front view of electronics Billboard of the utility model, face LED warning lights 5 are additionally provided with plate 1, the output end of governor circuit is connected with the input of LED warning lights 5, and LED warning lights 5 are used for Emit beam to cause monitored object to note, and then monitored object is noticed the monitor video that display screen is played, warning has been entered Enter in monitoring range.In the present embodiment, LED warning lights are three kinds of LED warning lights of color, in such as Fig. 3 501,502 and 503, Specifically, LED warning lights include red LED warning light, yellow led warning light, purple LED warning lights and green LED indicator light, When actually used, the selection of LED warning lights is red, green and three kinds of LEDs of color of purple, and electronics Billboard is in open state Under, can choose whether to open LED warning lights, under LED warning lights are in running order, 3 LED warning lights dodge for discontinuous It is bright, and red is shown in turn, green and three kinds of colors of purple, the brightness ratio of display is higher, attracts monitored person's so as to play The effect of notice, coordinates monitor video and monitor prompt information that display screen is played, plays monitored effect of informing, warns Monitored object, constrains in the personal behavior in monitoring range.

Used as the further improvement of technical scheme, with reference to Fig. 4, Fig. 4 is an a kind of tool of electronics Billboard of the utility model Body embodiment top view, the side of housing 2 is provided with interface circuit, and the output end of interface circuit connects with the input of governor circuit Connect, interface circuit includes USB interface 601, HDMI 602, USB interface, AV interfaces and RJ45 interfaces, wherein, signal input Interface includes HDMI（High-definition digital interface）, VGA (Video Graphics Array Video Graphics Arrays）Interface, AV（Audio Video）The audio input interfaces such as SD analog video interface, facilitate the external miscellaneous equipment of electronics Billboard, further, electronics Billboard can play the audio signal of miscellaneous equipment input；Signal output interface is RJ45 interfaces, can be exported signal high definition；Also It is used for input power and the USB interface as input/output interface including power input interface.

Used as the further improvement of technical scheme, with reference to Fig. 5, Fig. 5 is an a kind of tool of electronics Billboard of the utility model Body embodiment right view, the side of housing 2 is provided with control button 7, and the output end of control button 7 connects with the input of governor circuit Connect.Different control signals are input into by different control buttons 7 to realize the function control different to electronics Billboard, this implementation Example in, control button 7 include on/off key, broadcasting/pause button, stop key, mute button, menu key, confirmation by Key, exit button, upward button, down button, sound increase/to the right button, sound reduce/to left button, image parameter adjust Section button etc., image parameter regulating key includes color temperature mode regulating key, as shown in figure 5, Fig. 5 illustrates have 7 controls The situation of button 7.

As the further improvement of technical scheme, infrared remote-controlled signal receiving circuit, infrared remote control letter are additionally provided with housing Number output end of receiving circuit is connected with the input of governor circuit, and infrared remote-controlled signal receiving circuit usually uses infrared receiver Diode receives the infrared control signal of remote control transmission, and general infrared remote-controlled signal receiving circuit includes that 433MHz is wireless Receiving circuit and 315MHz wireless receiving circuits.

As the further improvement of technical scheme, VESA wall hanging hole positions are provided with rear side of housing, with reference to Fig. 4, Fig. 5, figure 6th, Fig. 7 and Fig. 8, Fig. 4 are an a kind of specific embodiment top views of electronics Billboard of the utility model, and Fig. 5 is the utility model A kind of one specific embodiment right view of electronics Billboard, Fig. 6 is an a kind of specific implementation of electronics Billboard of the utility model Example left view, Fig. 7 is an a kind of specific embodiment rearview of electronics Billboard of the utility model, and Fig. 8 is the utility model one Another structural representation of a specific embodiment of electronics Billboard is planted, the rear side of the housing 2 of electronics Billboard is provided with VESA Wall hanging hole position 8, there is provided 100*100 millimeters and 200*200 millimeters of VESA（（Video Electronics Standards Association VESAs）International standard interface, to facilitate user with international wall hanging rack handle Electronics Billboard hung on a wall or other need the region of suspension, it is not necessary to specific customization hanger again, it is very convenient.

Used as the further improvement of technical scheme, the upper and lower part on rear side of housing is additionally provided with and is respectively used to protection interface electricity Road and the protection cap of camera, rotate connection between protection cap and housing, so that protection cap has open and close status, During open mode, there is an angle between protection cap and housing.

Specifically, it is an a kind of specific embodiment backsight of electronics Billboard of the utility model with reference to Fig. 7 and Fig. 8, Fig. 7 Figure, Fig. 8 is a kind of another structural representation of a specific embodiment of electronics Billboard of the utility model, and protection cap includes interface Circuit protective cover 901 and camera protection cover 902, protection cap is respectively by a pair first connecting shafts 1001 and a pair second connections Axle 1002 is connected with housing into rotation, and the opening direction of interface circuit protection cap 901 is from top to bottom to open, interface circuit protection cap Expose the signal input and signal output interface and power input interface of electronics Billboard after 901 openings；Camera protection cover 902 opening direction is to open from the bottom to top, and the opening direction of protection cap can also be reversed with above-mentioned, or be arranged to The mode that left and right directions is opened, is capable of achieving the defencive function of protection cap.In the closed mode of protection cap, can be by spiral shell Be fixed on protection cap on housing by silk, electronics Billboard is formed fixed entirety.

Camera protection cover 902 is applied not only to protect camera, can also be easy to the camera angle and shooting effect of camera Fruit is adjusted.After electronics Billboard is installed, different user is different for camera watch region requirement, and angle is different, far and near It is different.Camera protection cover 902 can be flipped up certain angle, usually, can be flipped up 90 degree, to install dimension Shield personnel adjust camera and shoot with video-corder the angle in region, far and near and definition manually；After regulation is completed, camera protection cover 902 can restore, and be screwed, in order to avoid layman's touching or regulation camera, the quality that influence is shot with video-corder.

Used as the further improvement of technical scheme, with reference to Fig. 9, Fig. 9 is a kind of shooting of electronics Billboard of the utility model One specific embodiment structural representation of head governor motion, also includes the shooting of the camera angle for adjusting camera in housing Head governor motion, camera governor motion includes the first installed part 12, the second installed part 13 and the 3rd installed part 14, and first installs Part 12 is fixedly connected with camera 15, and the first installed part 12 is rotated with the second installed part 13 by first rotating shaft 16 and is connected, and first Being rotated with the 3rd installed part 14 entirely through the second rotating shaft 17 for the composition of 12 and second installed part of installed part 13 is connected, first rotating shaft 16 and second rotating shaft 17 be mutually perpendicular to.

Specifically, with reference to Fig. 9, Fig. 9 is a kind of the specific of camera governor motion of electronics Billboard of the utility model Example structure schematic diagram, the first installed part 12 includes the first base plate 121, the first side plate 122 and the second side plate 123, the second peace Piece installing 13 includes the second base plate 131, the 3rd side plate 132 and the 4th side plate 133, and the 3rd installed part 14 includes the 5th side plate 141, the Three base plates 142, the first fixed plate 143 and the second fixed plate 144, the first base plate 121 are fixedly connected with camera 15, the first side plate 122 and second side plate 123 be connected with the 3rd side plate 132 and the rotation of the 4th side plate 133 by first rotating shaft 16, the second base plate 131 Rotated with the 5th side plate 141 by the second rotating shaft 17 and be connected, camera governor motion is fixed by the first fixed plate 143 and second Plate 144 is fixedly connected with miscellaneous part, and mounting hole 20 is provided with the first fixed plate 143 and the second fixed plate 144, can be by spiral shell Silk etc. is fixed with miscellaneous part, and in the present embodiment, camera governor motion passes through the first fixed plate 143 and the second fixed plate 144 are fixedly connected with the casing, and camera governor motion is fixed on into enclosure interior.A pair of phases are additionally provided with 5th side plate 141 The waist-shaped hole 18 symmetrical for the second rotating shaft 17, is provided with a pair limited posts 19 corresponding with waist-shaped hole 18 on the second base plate 131, As shown in figure 9, the back and forth movement in waist-shaped hole 18 of limited post 19, after the fixation of camera governor motion, the He of the first installed part 12 The rotation that certain angle can be realized entirely through limited post 19 and waist-shaped hole 18 of the composition of the second installed part 13, realizes camera Camera angle is adjusted；In the present embodiment, it is capable of achieving 30 degree of rotational angle.

Used as the further improvement of technical scheme, with reference to Fig. 8, Fig. 9 and Figure 10, Fig. 8 is that a kind of electronics of the utility model is public Show another structural representation of a specific embodiment of board, Fig. 9 is a kind of camera regulation of electronics Billboard of the utility model One specific embodiment structural representation of mechanism, Figure 10 is that an a kind of specific embodiment of electronics Billboard of the utility model is looked up Figure, is additionally provided with camera adjustment hole 11 on housing, the position of camera adjustment hole 11 faces camera 15 and sets, except logical Cross and open outside the camera angle regulation that the regulation camera governor motion of camera protection cover 902 carries out camera 15, user is also Camera governor motion can be manually adjusted by camera adjustment hole 11 carries out angular adjustment to camera, without taking electronics Billboard carries out camera regulation to open camera protection cover 902, very convenient quick, designs very hommization.

Used as the further improvement of technical scheme, power circuit includes AC-DC 12V voltage conversion circuits, DC 24V-DC 12V voltage conversion circuits and single-pole double throw electromagnetic relay, the input connection alternating current of AC-DC 12V voltage conversion circuits Source, DC 24V-DC 12V voltage conversion circuits input connection direct current 24V power supplys, AC-DC 12V voltage conversion circuits it is defeated Go out end to be connected with the normally-closed contact of single-pole double throw electromagnetic relay, the output end and list of DC 24V-DC 12V voltage conversion circuits The normally opened contact connection of dpdt double-pole double-throw (DPDT) electromagnetic relay, the output end of single-pole double throw electromagnetic relay is connected with governor circuit.

In the present embodiment, with reference to Figure 11, Figure 11 is a kind of specific real power circuit one of electronics Billboard of the utility model A structured flowchart is applied, AC-DC 12V voltage conversion circuits are input into 90 ~ 240V of civil power AC and convert thereof into the direct current of DC 12V Electricity output, and from the A ends input in Figure 11；The voltage of DC 24V is input into DC 24V-DC 12V voltage conversions from the B ends in Figure 11 DC24V is converted into DC12V direct current electricity outputs by circuit, DC 24V-DC 12V voltage conversion circuits；Single-pole double throw electromagnetism relay Utensil has the function of automatically selecting connection AC-DC 12V voltage conversion circuits or DC 24V-DC 12V voltage conversion circuits, tool The selection situation of body is as follows：

1st, A ends have DC 12V be input into when, single-pole double throw electromagnetic relay attonity, single-pole double throw electromagnetic relay it is normally closed The closing of contact, DC 12V voltage of the C-terminal output from the input of A ends.

2nd, when B ends there are DC 24V to be input into, DC 12V are converted into by DC 24V-DC 12V change-over circuits and are exported, further The normally opened contact of single-pole double throw electromagnetic relay is input into, at this moment the action of single-pole double throw electromagnetic relay, single-pole double throw electromagnetism relay The normally-closed contact of device is disconnected, and the normally opened contact closure of single-pole double throw electromagnetic relay, C-terminal output is changed through DC 24V-DC 12V Circuit conversion into DC 12V voltages.

3rd, side a and b has DC 12V and DC two kinds of control sources of 24V simultaneously when, the action of single-pole double throw electromagnetic relay, The normally-closed contact of single-pole double throw electromagnetic relay disconnects, the normally opened contact closure of single-pole double throw electromagnetic relay, single-pole double throw electricity Magnetic relay automatically selects the DC 12V voltages that output is converted into through DC 24V-DC 12V change-over circuits.

Two kinds of power supplys of power circuit compatible with alternating and direct current of electronics Billboard, practicality is high, widely applicable.In addition, single The DC 12V voltages of dpdt double-pole double-throw (DPDT) electromagnetic relay output can also be exported by a power output interface so that electronics Billboard is also Can be used as stand-by power supply, can with external another camera or other equipment for being operated in DC 12V, during practical application, Connect for convenience, the power input interface and power output interface of DC 24V-DC 12V change-over circuits are merged into a power supply and connect Oralia.

Further, the frame of electronics Billboard uses metal shell, sturdy and durable, it is adaptable to the various rings such as public arena Used under border, typically using aluminum alloy frame.In addition, the panel of electronics Billboard covers the safety glass of 3 millimeters thicks, liquid is given Crystal display screen and high-definition camera are protected well, to avoid the LCDs caused by external cause from normally showing or take the photograph As the situation that head cannot normally shoot with video-corder.

Above is preferable implementation of the present utility model is illustrated, but the invention is not limited to the reality Example is applied, those of ordinary skill in the art can also make a variety of equivalent variations on the premise of without prejudice to the utility model spirit Or replace, these equivalent deformations or replacement are all contained in the application claim limited range.

Claims (10)

1. a kind of electronics Billboard, including panel and housing, it is characterised in that the panel includes viewing area and IMAQ Area, the viewing area is provided with display screen, and the display screen includes the monitor prompt presentation of information for display monitoring prompt message Area and the monitor video broadcast area for playing monitor video, are provided with described image acquisition zone for shooting taking the photograph for monitor video As head, governor circuit and power circuit are provided with the housing, the governor circuit is used to receive, store monitor video and control The real-time display monitoring prompt message of display screen and monitor video, the output end of the power circuit is connected with governor circuit, described The output end of camera is connected with the input of governor circuit, and the output end of the governor circuit connects with the input of display screen Connect.

2. electronics Billboard according to claim 1, it is characterised in that LED warning lights are additionally provided with the panel, it is described The output end of governor circuit is connected with the input of LED warning lights.

3. electronics Billboard according to claim 1, it is characterised in that the side of the housing is provided with control button, institute The output end of control button is stated to be connected with the input of governor circuit.

4. electronics Billboard according to claim 1, it is characterised in that be additionally provided with infrared remote-controlled signal in the housing and connect Circuit is received, the output end of the infrared remote-controlled signal receiving circuit is connected with the input of governor circuit.

5. electronics Billboard according to claim 1, it is characterised in that the side of the housing is provided with interface circuit, institute State the output end of interface circuit to be connected with the input of governor circuit, the interface circuit includes USB interface, HDMI, VGA Interface, AV interfaces and RJ45 interfaces.

6. the electronics Billboard according to any one of claim 1 to 5, it is characterised in that also include being used in the housing The camera governor motion of the camera angle of camera is adjusted, the camera governor motion includes the first installed part, the second peace Piece installing and the 3rd installed part, first installed part are fixedly connected with camera, first installed part by first rotating shaft with Second installed part rotates connection, and what first installed part and the second installed part were constituted installs entirely through the second rotating shaft with the 3rd Part rotates connection, and the first rotating shaft and the second rotating shaft are mutually perpendicular to.

7. electronics Billboard according to claim 6, it is characterised in that the power circuit includes AC-DC 12V voltages Change-over circuit, DC 24V-DC 12V voltage conversion circuits and single-pole double throw electromagnetic relay, the AC-DC 12V voltage conversions The input connection AC power of circuit, the input connection direct current 24V electricity of the DC 24V-DC 12V voltage conversion circuits Source, the output end of the AC-DC 12V voltage conversion circuits is connected with the normally-closed contact of single-pole double throw electromagnetic relay, the DC The output end of 24V-DC 12V voltage conversion circuits is connected with the normally opened contact of single-pole double throw electromagnetic relay, the single-pole double throw The output end of electromagnetic relay is connected with governor circuit.

8. electronics Billboard according to claim 7, it is characterised in that the upper and lower part on rear side of the housing is additionally provided with The protection cap of protection interface circuit and camera is respectively used to, connection is rotated between the protection cap and housing, so that protection Lid has open and close status, in open mode, there is an angle between protection cap and housing.

9. electronics Billboard according to claim 8, it is characterised in that VESA wall hangings hole is provided with rear side of the housing Position.

10. electronics Billboard according to claim 9, it is characterised in that the display screen includes LCDs.