A vehicle with an exterior digital display screen

Abstract

A digital display screen (1) adapted to be mountable on a surface of a vehicle so as to be outwardly facing only from the vehicle, wherein the digital display screen comprises a plurality of display members that are operable to display an image on the digital display screen. A digital display screen wherein the display members are light emitting diodes, LEDs (2).

Description

[0001] A VEHICLE WITH AN EXTERIOR DIGITAL DISPLAY SCREEN

[0002] The present invention relates to a vehicle with an exterior digital display screen and a digital display screen system.

[0003] It is well known for businesses to advertise on the side of buses. As such advertisements are mobile, they can potentially reach a greater audience than any static advertisement and are therefore a more effective form of advertising than static advertisements. The sides of buses have also been used by governments as a platform to provide important public messages. Bus-side advertising or government messaging generate additional revenue for the bus company and so are a mutually beneficial business strategy utilised by bus companies.

[0004] Traditionally, bus-side advertisements are large printed posters using approved vinyl only inc. GRAFITYP M112R, ORACAL 1620 or RITRAMA 04350 RI-145 / 100. One entire advertisement display is made up of four exact pieces. These printed vinyl pieces have an image on one side and on the other side or rear there is an adhesive ‘sticky back’ with a ‘peel off’ cover sheet. The cover sheet is then removed to expose the adhesive and then the printed vinyl poster is manually stuck to a 6mm Correx® Board (or similar). Correx® is a trademark of Corplex, it is a brand name for a twin walled extruded polypropylene sheet. It is often described as a corrugated plastic sheet.

[0005] This traditional form of advertisement can be viewed as having a negative environmental impact. This is due to the fact that the that the vinyl can not be recycled and the effort of labour needed to first apply the vinyl to the Correx® and then to install the complete panel to a bus will create a measurable carbon footprint. All elements combined then multiplied by number of busses in any said fleet and there is significant cause for concern. The negative environmental impact can see a minor reduction in the selection of conscientious vendors using sustainable methods and materials of vinyl print and production. A further reduction can be achieved by reusing the Correx® numerous times by removing the printed vinyl with heat after the advertising cycle and then reapply the new vinyl for the next cycle. There is therefore a desire to utilise digital display screens on the side of buses to display advertisements or other messages.

[0006] The image on a digital display screen can be easily changed without requiring any skilled labour and without the expense of traditional methods of advertising on the side of a bus. Traditional printed signs can put ads of one advertiser at a time however digital display screens can put many advertisers’ ads together under a playlist and play these on the led display screen in turn, for example each ad stays 15 seconds on a timed sequence. Further advantageously, advertisers can utilise moving images which may offer a more effective form of advertising than a still image. However, previous attempts to mount a digital display screen on the side of a bus have not been successful. Many countries have strict regulations regarding the maximum width of a bus on a road. Digital display screens are typically much thicker than traditional advertisements and so this has been a major drawback in the move towards digital advertising on buses. Further, such screens are heavy in comparison to traditional advertisement media and again this causes issues in relation to regulations for maximum weights of buses, as weight added to the side of a bus can affect its balance and reduce passenger capacity. Further, the electrically-operated screens are prone to water damage and this has provided a further barrier to the move to digital display screen on buses.

[0007] There is therefore a need for improved digital display screens optimised to be mounted on the exterior of buses and other vehicles. It is an object of the present invention to obviate or mitigate the above-mentioned problems, and to provide a vehicle with an exterior digital display screen that is thin, lightweight and weather-resistant. Further, it is an object of the invention to provide a digital display screen that meets these requirements while also providing a satisfactory screen resolution.

[0008] Accordingly, there is provided a vehicle having a surface, the vehicle further having a digital display screen mounted on the surface of the vehicle so as to be outwardly facing from the vehicle, wherein the digital display screen comprises a plurality of display means that are operable to display an image on the digital display screen.

[0009] By outwardly facing we mean facing towards the outside of the vehicle only as opposed to facing towards the inside of the vehicle. Internally mounted information displays face towards the passengers in the vehicle whereas the present invention is intended for an audience outside of the vehicle only.

[0010] Ideally, the vehicle has an outer surface and the digital display screen is mounted on the outer surface.

[0011] Alternatively, the vehicle has an interior surface and the digital display screen is mountable on the interior surface to be outwardly facing from the vehicle only. In other words, the digital display screen could be mounted on the interior surface of the bus however the digital display screen is facing towards the window proximal to where the digital display screen is mounted so it is visible to an audience outside the vehicle through the window. Preferably, the display means are light emitting diodes (LEDs).

[0012] Ideally, the digital display screen further comprising an enclosure around the LEDs, the LEDs being sealed within the enclosure to prevent ingress of dust and moisture into the enclosure and towards the LEDs.

[0013] In a further aspect of the invention, there is provided a digital display screen adapted to be mounted on a surface of a vehicle so as to be outwardly facing only from the vehicle, wherein the digital display screen comprises a plurality of display means that are operable to display an image on the digital display screen.

[0014] Preferably, the display means are light emitting diodes (LEDs).

[0015] Ideally, the digital display screen further comprising an enclosure around the LEDs, the LEDs being sealed within the enclosure to prevent ingress of dust and moisture into the enclosure and towards the LEDs.

[0016] Ideally, the enclosure is configured to prevent ingress of solid particles having a diameter of less than 1 mm. More preferably, the enclosure is configured to completely protect the LEDs from dust. The enclosure may comprise a plurality of LED-covers. Alternatively, one cover covers a plurality of LEDs. The covers function collectively to provide an enclosure or a part thereof. The enclosure may comprise a resin applied over the LEDs to protect the LEDs.

[0017] Preferably, the enclosure is configured to prevent ingress of moisture. Ideally, even when the digital display screen is subjected to powerful water jets. Ideally, even when the digital display screen is immersed in water up to a depth of a 1 metre.

[0018] Ideally, the enclosure is formed at least partially from a plastic. This advantageously protects the LEDs from damage. Preferably, the enclosure has a black colour which increases the light contrast and / or protects the LEDS from physical damage. Advantageously, the enclosure is formed at least partially from acrylic also arranged to protect the LEDs from damage, for example tree branches may flip the surface of the screen while the bus is moving.

[0019] In an alternative arrangement, the display means is embedded in a substrate.

[0020] Preferably, the LEDS are embedded in a substrate.

[0021] Ideally, the display means is embedded in a resin.

[0022] Preferably, the LEDs are embedded in a resin.

[0023] Ideally, the resin is an epoxy resin. Preferably, the resin is matte resin.

[0024] Ideally, the resin is a non-reflective resin. Advantageously, the non-reflective resin does not attenuate or distort the light output.

[0025] Preferably, the resin is black in colour. Advantageously, the LEDS being embedded in the resin protects the LEDS from damage such as accidental contact with tree branches or traffic lights or other accidental contact with articles impinging upon the display screen. Ideally, the digital display screen further comprises at least one panel.

[0026] Preferably, the digital display screen comprises a plurality of panels, each panel comprising LEDs, and each panel being operable together to provide a single image across the plurality of panels. Preferably, the digital display screen comprises at least 2, 4, 8, 16 or 20 panels. In one embodiment, the digital display screen comprises 20 panels. Each panel may also be operable independently of the other panels. Ideally, the panels are arranged linearly in a single row.

[0027] Ideally, a panel comprises at least one printed circuit board (PCB) and at least one LED wherein at least one LED is arranged on / inserted into the printed circuit board.

[0028] Ideally, the digital display screen further comprises at least one housing.

[0029] Ideally, the panel is located / installed on / in the housing.

[0030] Preferably, the panel or board is mechanically fixed or adhered or glued or bonded to the housing. Ideally, the glue is an epoxy resin material.

[0031] Ideally the housing is made of metal. The metal may be selected from aluminium, copper or other metals.

[0032] Preferably, the housing is made of aluminium. Advantageously, the metal housing can efficiently dissipate heat and reduce the temperature of the board.

[0033] Ideally, a sealant is used on the surface of the panel to make it waterproof. Preferably, the sealant is applied on the housing after locating / installing the panel into the housing which further plays a role in waterproofing and moisture-proofing.

[0034] Preferably, the enclosure is installed after the application of sealant on the housing comprising the panel. Ideally, the sealant is applied to the surface of the printed circuit board assembly.

[0035] Preferably, the sealant is a potting silicone sealant.

[0036] Ideally, the sealant may be made from silicone or polyurethane or acrylic or hybrid polymer.

[0037] Preferably, the sealant is used for sealing the panel from moisture and dust.

[0038] Ideally, the digital display screen is mounted to the exterior surface of the vehicle with a mounting means. Ideally, the vehicle has a top surface and front, rear and side surfaces depending downwardly from the top surface. The front surface is the leading surface when the vehicle is moving forward, with the rear surface being at an opposing end of the vehicle. Ideally, the side surfaces extend between the front and rear surfaces. At least one digital display screen may be mounted on one side surface, but ideally the vehicle comprises at least two digital display screens, wherein at least one is mounted on either side surface of the vehicle. Ideally, at least one digital display screen may be mounted on the front surface and / or the rear surface.

[0039] Preferably, the vehicle is a bus, double-decker bus or coach. The vehicle may alternatively be a utility vehicle or security vehicle.

[0040] Ideally, the total depth of the digital display screen and mounting means is less than 50 mm, 45 mm, 40 mm, 35 mm or 32 mm. In one embodiment, the total depth of the digital display screen and mounting means is 32.1 mm.

[0041] Preferably, the total width of the vehicle as measured from one side surface to the other side surface of the vehicle and including the digital display screen is in a range of between 2.3 m and 2.7 m and ideally less than 2,550 mm. Advantageously, this 2,550 mm is the maximum width of a bus, double-decker bus or coach legally permitted on public roads in the UK, EU and other countries.

[0042] Ideally, the total width of the vehicle as measured from one side surface to the other side surface of the vehicle and including the digital display screen is less than the legally permitted width on public roads in any particular country the vehicle is located in.

[0043] Preferably, the total weight of the digital display screen and mounting means is less than 200, 180, 160, 140, 120 or 90 kg. In one embodiment, the weight of the digital display screen and mounting means is 120 kg or approximately 120 kg. Advantageously, the digital display screen is relatively light in weight compared to other digital display screens. This minimises effect on tilt factor and does not reduce passenger capacity where the vehicle is a bus, double-decker bus or coach. In one embodiment, a complete bus superside screen 1 foot by 20 foot long is under 90kgs.

[0044] Preferably, the LEDs define a display area. Preferably, the display area has a width of at least 1 , 2, 3, 4, 5 or 6 m. In one embodiment, the display area has a width of 6,096 mm. Preferably, the display area has a height of at least 100, 200, 300, 400, 500 or 600 mm. Ideally, the height-to-width ratio of the display area is in a range of between 1 :1 to 1 :10 or greater. In one embodiment, the display area has a height of 609.6 mm. It will of course be appreciated that the panels are modular and so any shape and size of modular panel assembly can be assembled in single or multiple rows or columns of one or more panels so as to fill a desired advertising space.

[0045] Ideally, the enclosure comprises a frame that extends around the display area. Ideally, the display area and frame collectively have a width of at least 1 , 2, 3, 4, 5 or 6 m. In one embodiment, the display area and frame have a width of 6,158 mm. Preferably, the display area and frame have a height of at least 100, 200, 300, 400, 500 or 600 mm. In one embodiment, the display area and frame have a height of 673 mm.

[0046] Preferably, the LEDs provide a plurality of pixels, wherein each pixel is the centre point of an LED. The digital display screen has a density of pixels of greater than 10,000, 20,000, 30,000, 40,000, 50,000, 60,000, or 65,000 per m2. In one embodiment, the density of pixels is 99,225 per m2. In an embodiment, each LED has dimensions of 1.4 x 1.5 mm.

[0047] Ideally, the pixel pitch, being the distance between the centre of two adjacent LEDs, is less than 10, 8, 6, or 4 mm. Ideally, the pixel pitch is from 3.1 mm to 2.2mm. In one embodiment, the pixel pitch is 3.175 mm.

[0048] Ideally, the digital display screen having a display resolution between 192 x 1920.

[0049] Preferably, the digital display screen has a display resolution of 192 x 1920, with a pixel pitch of 3.175 mm.

[0050] Preferably, the digital display screen has a display resolution of 256 x 2560, with a pixel pitch of 2.38mm. It will of course be appreciated that the panels are modular and so any shape and size of modular panel assembly can be assembled in single or multiple rows or columns of one or more panels so as to fill a desired advertising space and so the display resolution and pixel pitch is adaptable / adjustable with the modular panel adjustability to suit the bespoke requirements. Ideally, the digital display screen has a brightness in the range of 3500 cd to 8000 cd.

[0051] Preferably, the digital display screen has a brightness up to 5800 cd with a pixel pitch of 3.175 mm.

[0052] Ideally, the digital display screen has a brightness in a range of 4000 cd to 4500 cd with a pixel pitch of 2.38mm.

[0053] Preferably, the digital display screen has a brightness over 8000 cd with a pixel pitch of 3.81 mm.

[0054] Ideally, the system is a dual control system of asynchronous and synchronous operation to meet parameters of the allowable display characteristics.

[0055] Ideally, the LEDs have a brightness of at least 1 ,000, 2,000, 3,000, 4,000, 5,000, 6,000, 7,000, or 8,000 cd per m2. Ideally, the digital display screen is configured to operate below the maximum light output of the LEDs. This minimises heat generation by the LEDs. Preferably, the vehicle does not comprise a mechanical fan for cooling the digital display screen. Noise and electromagnetic interference associated with use of a fan is thereby avoided. Ideally, the digital display screen comprises a heat sink for absorbing heat generated from operation of the LEDs. Advantageously, the heat absorption may be achieved by using a cool air hose from the bus air-conditioner to cool the LED screen.

[0056] Preferably, the heat sink may be integrated / embedded with the panel for absorbing heat generated by LEDs while in use.

[0057] Ideally, the heat sink is made of metal. The metal may be aluminium, copper, or other metals.

[0058] Preferably, the heat sink is made of aluminium.

[0059] Ideally, the heat sink is provided by the metal housing.

[0060] Alternatively or additionally, the heat sink can be provided by cool air flow or other material types or any other means of absorbing heat suitable to the circumstances.

[0061] Preferably, the vehicle has an electrical power system, and the digital display screen is powered by the electrical power system.

[0062] Ideally, the primary power supply is a 12 V DC or a 24V DC power supply. The power supply has a maximum load of 100 amps for vehicle applications. Ideally, the digital display screen is configured such that when it is being powered on, not all panels are powered on simultaneously. Ideally, each panel is powered on in turn. This advantageously avoids an inductive start-up load and total power drawn from the electrical power system at any one time is reduced during powering on of the digital display screen. The digital display screen further ideally comprises a regulator set to power off the digital display screen if the volume of power that is drawn by the digital display screen exceeds a predetermined limit.

[0063] Ideally, the digital display screen system comprises solid state electronics.

[0064] Ideally, the digital display screen system comprises solid state electronics with an integral heat sink.

[0065] Preferably, the digital display screen system comprises a control means. Preferably, the control means can determine when the vehicle is moving and when the vehicle is static. Ideally, the control means is operable to control whether the image displayed on the digital display screen is moving or is static. A moving image on a moving vehicle may distract other drivers’ attention therefore it may cause traffic accidents. Preferably, the control means is configured to prevent moving images appearing on the digital display screen when the vehicle is moving. Advantageously, this ensures that the vehicle conforms to legislation preventing moving images on the side of moving vehicles.

[0066] Ideally, the control means is housed in the enclosure of the digital display screen. Preferably, the control means comprises a data processor and data storage means. Ideally, the control means comprises a transmitter and a receiver. Preferably, the control means is connectable to a cellular network, and preferably comprises a SIM card. Preferably, the control means is configured to transmit and receive data via the cellular network.

[0067] Preferably, the control means comprises location software to identify the location of the digital display screen and therefore of the vehicle. Preferably, the control means is configured to relay location data via a fully encrypted cloud-based facility. Preferably, the control means is configured to back-up data.

[0068] Ideally, digital display screen system comprises a light sensor configured to determine ambient brightness. Preferably, the control means is configured to control the brightness of the LEDs and is operable to change the brightness of the LEDs. Preferably, the LED brightness can be manually changed. Ideally, the LED brightness can be set to be automatically changed in response to data received from the light sensor. Advantageously, the LED brightness can be configured to automatically dim when ambient brightness is low, and to brighten when ambient brightness is high. This thereby avoids glare on the digital display screen and conserves energy when not required. Ideally, the system incorporates the highest output LEDs achievable so that even when driving the LEDS at reduced output, the system is capable of providing the necessary brightness levels regardless of the ambient light conditions.

[0069] Ideally, the digital display screen has a frame refresh rate of greater than 1 ,000, 2,000, 3,000, 4,000 or 5,000 Hz. Advantageously, a frame refresh rate of 5,000 Hz or greater guarantees no picture distortions. Advantageously, there is no flickering images when the screen is videoed or recorded or photographed.

[0070] Preferably, the digital display screen system comprises gold wire electrical connections for data transfer.

[0071] Ideally, the digital display screen system control means comprises a computer.

[0072] Preferably, the digital display screen system control means comprises a video processor.

[0073] Preferably, the computer is a micro-pc or small form factor computer.

[0074] Ideally, the computer has an operating system, preferably windows based.

[0075] Preferably, the operating system is compatible with a plurality of digital content production software systems such as Broadsign.

[0076] Ideally, the digital display screen system control means is operably communicative with a range of wireless telecommunications networks.

[0077] Ideally, the digital display screen system control means is operably communicative with 4G and / or 5G and / or 6G.

[0078] Preferably, the digital display screen system control means is operably communicative with 4G and / or 5G and / or 6G via a router.

[0079] Ideally, the router has E Mark Certification. An E-Mark or e-Mark is a European conformity mark that proves a vehicle or vehicle component complies with regulations, laws and directives in the European Union. The E-mark certification is issued by a certified authority.

[0080] Preferably, the router is of military grade quality.

[0081] Advantageously, the router provides the added option to offer the enhancement of simultaneous connectivity for multiple independent information sources. By way of illustration, this means that multiple connections and sensors can be incorporated providing not just the basic screen system management but also that the vehicle’s performance data or its specific location can be monitored as well as environmental data such as air quality. All the information can be collated in this one unit and communicated totally securely and independently to the various relevant parties. This could include the vehicle manufacturer, the vehicle operators, relevant public and government agencies as well as the screen content providers responsible for operating and managing the general on screen display content.

[0082] Ideally, the router is tested for shock and vibration for vehicle and / or rail and / or military specification.

[0083] Ideally, the router is tested to the standard SAE J 1455 (Vibration: Section 4.10.4.1 and 4.10.4.2 Cab Mount, Shock: Section 4.11.3.4 Operational Shock).

[0084] Ideally, the router is tested to the standard EN 61373 (Shock, Vibration long-life / functional-random).

[0085] Ideally, the router is tested to the standard MIL-STD-810G (Shock: test method 516.6. Operational Vibration: test method 514.6).

[0086] Ideally, the router is designed to be integrated to power sensitive vehicular based systems. Power draw on vehicles, particularly electric vehicles is crucial. Where possible, the power draw needs to be optimised and kept to a minimum. The router has the lowest power draw available.

[0087] Ideally, the router can operate in standby mode where the minimal amount of power is used. Advantageously, the router is effectively asleep until required.

[0088] Ideally, in standby mode, where there is no activity occurring and all ports are shut down. Ideally, the power draw figures in standby mode are approximately 3.9mA / 46.8mW.

[0089] Preferably, the router can operate in multiple power modes available such as idle mode where the router is connected but there is no activity.

[0090] Ideally, in idle mode the power draw figures are approximately 0.37A / 4.46W.

[0091] Ideally, the router can operate in ignition mode, where the router is powered on when the vehicle starts, or by setting a series of conditions that when met, will automatically start the router. Advantageously, these are designed to stop power being drawn unnecessarily by the router when it is not in use.

[0092] Preferably, when the router is operating under normal conditions, where the router is connected with ongoing activity, the power draw figures are approximately 0.39A / 4.70W. Ideally, the router has at least one input / output (I / O) port and serial port.

[0093] Preferably, the I / O port and / or serial port are operable so as to manage and / or monitor specific events.

[0094] Ideally, the I / O port and / or serial port are operable so as to manage and / or monitor voltage levels and / or one or more sensors, such as environmental sensors.

[0095] Preferably, I / O port and / or serial port are operable so as to switch the router on when power is applied to the I / O port.

[0096] Preferably, there is more than one I / O port on the router.

[0097] Ideally, there are at least three I / O ports on the router.

[0098] Preferably, one of the ports is a general purpose I / O port (GPIO).

[0099] Ideally, the GPIO measures voltages and voltage range.

[0100] Preferably, the router has two digital ports.

[0101] Ideally, at least one digital port is capable of monitoring a circuit and responding when the circuit is opened or closed.

[0102] Preferably, at least one I / O port is capable of sensing power / voltage of a vehicle door for example so that the door being opened or closed presents a different condition to the I / O port.

[0103] Ideally, the router has means for executing an action based on the condition presented at the at least one I / O port.

[0104] Preferably, the router is capable of communicating the action to the computer as a signal.

[0105] Ideally, the computer has means for receiving signals from the router and running program instructions based on the received signals.

[0106] Ideally, the program instructions comprise instructions for displaying media content on the digital display screen.

[0107] Preferably, at least one I / O port and / or serial port are capable of coupling to at least one sensor, such as an environmental sensor. Ideally, the data generated by the sensor is transmitted to the computer and / or to a remote data centre via the 4G and / or 5G and / or 6G network.

[0108] Preferably, the router has at least one serial port.

[0109] Ideally, the at least one serial port is couplable to serial devices using one or more protocols such as the RS485 and / or the RS232 protocol. A serial protocol is typically employed in rail, vehicular and industrial environments due to its multi-drop capability.

[0110] Ideally, the RS485 port is capable of being used for a plurality of sensors and / or serial to IP requirements.

[0111] Preferably, the router has at least one dedicated RS485 and at least one dedicated RS232 port.

[0112] Ideally, the router is capable of supporting up to 4 10 / 100 / 1000 Ethernet ports.

[0113] Preferably, an Ethernet port is connectable to one or more Ethernet devices such as CCTV cameras or computers.

[0114] Ideally, the router has VPN functionality. VPN is a Virtual Private Network, the method by which a connection across a public network, like the Internet, is encrypted to ensure the data is not hacked or corrupted along the way. With a VPN in place, the network connection would be completely secure and separate to any other network connection to the router. The router has a full Triple A security suite allowing the support of IT hardware providers such as Cisco and Juniper connectable using IPSecVPN or OpenVPN.

[0115] Preferably, the router has VL N functionality. A Virtual Local Area Network is a method by which the individual Ethernet ports on the router separate the data from the other Ethernet ports, effectively creating a virtual separate network on each Ethernet port. The benefit is that an operator can run multiple customer applications across the different Ethernet ports on the router and the data is all kept separated from the other ports, even though the data is running together through the 4G and / or 5G and / or 6G network. For example, on a bus, you could have 3 different networks. One to handle the CCTV, one to handle the screen data and PC connectivity and one to handle remote support and tracking. All three networks would be managed by the router independently and securely.

[0116] Ideally, the router has a configured space comprising memory.

[0117] Preferably, the router has processing means. Preferably, the configured space is capable of storing applications and / or program scripts capable of being executed like computer based code or applications.

[0118] Ideally, the stored information could be the firmware and configuration data for the computer.

[0119] Preferably, the stored information is at least one custom script executable when the I / O port data reports an event, for example a door opening.

[0120] Ideally, the stored information is at least one custom script executable to control the screen at predetermined times.

[0121] Preferably, the configured space provides storage for a repository of images for the digital display screen, for normal operation or redundancy requirements.

[0122] Advantageously, the configured space provides a means for storing custom applications and scripts thereby increasing the functionality of the system. The configured space provides a space on the router that can be customised and configured.

[0123] Ideally, the interfaces on the Ethernet and Input / Output (I / O) interface can be disabled via the control means so as to reduce the amount of power required by the router.

[0124] Preferably, the subsystems of the router such as LED’s, USB ports, GPS can be managed separately via the control means for optimisation of power.

[0125] Ideally, shutting down the subsystems of the router such as LED’s, USB ports and GPS can reduce the power by up to 0.08A / 1W.

[0126] Preferably, the router supports High Availability Interfaces. This means that you can set one of the ports of the router up to monitor one of the other ports and, should there be an issue, the monitoring port is capable of taking over, reducing downtime to milliseconds and ensuring continuity of service.

[0127] Ideally, the digital display screen system is a modular plug and play system.

[0128] According to a further aspect of the invention, there is provided a frame for supporting at least two inserts at spaced apart depth wise locations of the frame, the frame having a frame dividing means for dividing the depth of the frame and extending along all or a part of the inward facing perimeter of the frame, the dividing means protruding a short distance beyond the extent of the main perimeter frame members towards the centre of the frame. Advantageously, the dividing means allows the frame to simultaneously or alternately support two inserts formed for fitting into and being supported by the frame.

[0129] Ideally, the dividing means being parallel to and spaced between a main planar rear surface and a main planar front surface of the frame.

[0130] Ideally, the frame is a quadrangular frame.

[0131] Ideally, the inserts are advertising media inserts.

[0132] Preferably, the inserts are print and digital media inserts.

[0133] Preferably, the inserts have a quadrangular shape.

[0134] Ideally, the digital media insert is the panel or digital display screen as described above.

[0135] Preferably, the print media insert is a poster with printed media thereon.

[0136] Ideally, the dividing means for dividing the depth of the frame comprises a flange extending along all or a part of the inward facing perimeter of the frame.

[0137] Ideally, the dividing means for dividing the depth of the frame comprises a flange extending from all or a part of the inward facing perimeter frame member of the frame.

[0138] Ideally, the dividing means divides the depth of the inward facing perimeter of the frame into two recesses for independently receiving the two advertising media inserts.

[0139] Ideally, the dividing means divides the depth of the inward facing perimeter of the frame into two recesses, one recess being proximal to the main planar rear surface of the frame and the other recess being proximal the main planar front surface of the frame.

[0140] Ideally, the recess being proximal to the main planar rear surface of the frame is formed for receiving the print media insert and the other recess proximal the main planar front surface of the frame is formed for receiving the digital media insert.

[0141] Advantageously, the dividing means allows the print media insert to be placed on the frame at the same time as the digital media insert. This allows a vehicle operator to use traditional print media inserts where digital media inserts are not acceptable for whatever reason using the same frame, simply by removing the digital media insert from the frame thereby disclosing the already mounted print media insert hidden behind the digital media insert. Once the vehicle enters a region where digital media inserts are acceptable / allowed / authorised the digital media insert is simply refitted to the frame over the print media insert. Ideally, the frame is adapted to be mounted on a vehicle such as a bus. By adapted, we mean at least the size, depth and weight of the frame are so adapted.

[0142] The invention will now be described, by way of example only, with reference to the accompanying drawings in which: -Figure 1 is a perspective view of a digital display screen that is mountable on a vehicle according to the invention.

[0143] Figure 2, left, is a further perspective view of a digital display screen mountable on a vehicle according to the invention; Figure 2, right, is a partial rear perspective view of the same digital display screen.

[0144] Figure 3 is a rear perspective view of the digital display screen.

[0145] Figure 4 is a partial and enlarged rear perspective view of the digital display screen of Figure 3, showing the rear side of the panels that make up the digital display screen.

[0146] Figure 5 is a partial and enlarged front perspective view of the digital display screen.

[0147] Figure 6 is an alternative partial and enlarged front perspective view of the digital display screen.

[0148] Figure 7 is a partial and enlarged front perspective view of the digital display screen showing the enclosure frame extending around the perimeter of the digital display screen.

[0149] Figure 7a is a perspective partial view of a protective fascia for partially enclosing the LEDS;

[0150] Figure 8 is a schematic circuit diagram for the digital display screen.

[0151] Figure 9 illustrates an assembly for mounting the digital display screen to a vehicle such as a bus;

[0152] Figure 10 is a first perspective view of a frame for a display;

[0153] Figure 11 is a second perspective view of the frame for a display of Figure 10;

[0154] Figure 12 is a perspective view of the digital display screen mounted on a bus

[0155] Figure 13 is a schematic of the overall control system for the digital display screen.

[0156] Figure 14 is a perspective view of the digital display screen mounted on a bus In the drawings there is shown a digital display screen 1 which is adapted to be mounted on the exterior surface of a vehicle. Specifically, the digital display screen 1 is adapted to be mounted on the exterior side surface of a bus such as a double-decker bus. The digital display screen comprises a plurality of LEDs 2 which can be operated to display an image on the digital display screen 1. There is further an enclosure 3 around the LEDs 2. The LEDs 2 are sealed within the enclosure 3 to prevent ingress of dust and moisture into the enclosure 3 and towards the LEDs 2.

[0157] The enclosure 3 is configured to completely protect the LEDs from dust. The enclosure 3 comprises a plurality of LED-covers. Alternatively, one cover as illustrated in Figure 7a covers a plurality of LEDs. The enclosure 3 is further configured to prevent ingress of moisture even when the digital display screen 1 is subjected to powerful water jets. More specifically, the enclosure 3 is configured to prevent ingress of moisture even when the digital display screen 1 is immersed in water up to a depth of a 1 metre.

[0158] Digital display screens can be rated by an ‘Ingress Protection’ rating. An Ingress Protection rating is usually displayed by the letters ‘IP’ followed by two digits, for example, ‘I P45’. The first digit represents the level of protection against solid particles, wherein a higher rating is representative of protection against smaller particles. The second digit represents the level of protection against water, wherein a higher rating is representative of protection against more powerful jets of water up to total immersion in water. The digital display screen 1 is completely protected from dust, and can be immersed in water up to 1 meter. Such a screen has an Intrusion Protection rating of IP67.

[0159] The enclosure 3 is formed at least partially from a plastic which advantageously protect the LEDs from physical damage. The enclosure has a black colour which increase the light contrast. Advantageously, acrylics are also arranged to protect the LEDs from damage, for example tree branches may flip the surface of the screen while the bus is moving.

[0160] The digital display screen 1 has a plurality of panels 10, each panel comprising LEDs 2, and each panel 10 being interconnected and operable together to provide a single, joined image across the plurality of panels 10. In the illustrated embodiment, the digital display screen 1 has 20 panels arranged in a single linear row. In other embodiments, the digital display screen 1 may have more or less than 20 panels, and they may be arranged in a single linear row or in stacked rows. The panels 10 can be operated independently of one another but are also operable together to provide a single image. The panels can be 1 foot by 2 foot and can be integrated in either landscape or portrait format. Advantageously, the panels can simply be changed out as a complete unit without onsite maintenance requirements. The panel comprises at least one printed circuit board (PCB). The LEDs are arranged on / inserted into the printed circuit board (PCB). The digital display screen further comprises at least one housing wherein the panel is located / installed.

[0161] The housing is made of aluminium which can efficiently dissipate heat and reduce the temperature of the board. Advantageously, the sealant is used on the surface of the panel 10 to make it waterproof. The sealant is applied on the housing after locating / installing the panel 10 into the housing that further plays a role in waterproofing and moisture-proofing. The enclosure 3 is installed after the application of sealant on the housing comprising the panel. The silicone sealant is used for sealing the panel from moisture and dust.

[0162] Alternatively, the housing is made from a plastic or composite material.

[0163] Alternative materials other than acrylic may be used, provided the material provides suitable protection and sealing properties, and the material could be translucent as opposed to transparent if desired.

[0164] The digital display screen 1 is mounted to the exterior surface of the vehicle with a mounting assembly 4. The vehicle has a top surface and front, rear and side surfaces depending downwardly from the top surface. The front surface is the leading surface when the vehicle is moving forward, with the rear surface being at an opposing end of the vehicle. The side surfaces extend between the front and rear surfaces. The vehicle may have a digital display screen mounted on one side surface, but ideally, it has a first digital display screen mounted on one side surface and a second mounted on the other side surface. The vehicle may have a digital display screen 1 mounted on the front and / or rear surface as well as or alternatively to the side surfaces.

[0165] A first embodiment of mounting assembly 4 is shown in Figures 5 and 6 which has a support structure 5 for mounting the digital display screen onto a corresponding frame already mounted on the bus, not illustrated in this embodiment but further details of this mounting frame are provided in Figure 9 and described below. In figure 5 and 6, a plurality of upright members 8 are provided for supporting the panels and for installing the panels. The support structure 5 has an upper member 6 and a lower member 7. The upper member 6 is spaced apart from the lower member 7. The upper and lower members 6, 7 are elongate members and are arranged in parallel to one another. The panels are installed on a series of upright members 8 that extend between the upper and lower members 6, 7. The upright members 8 are elongate and are spaced apart from one another. The first embodiment of mounting assembly 4 is formed from aluminium, or substantially from aluminium. Specifically, the upper and lower members 6, 7 and upright members 8, are formed from aluminium tubes. Advantageously, the support structure 5 and upright members are lightweight due to the hollow structural members and lightweight materials. The support structure 5 has apertures 9 to receive fixings to fix the mounting means 4 and therefore the panels to a surface, such as a frame already mounted on the side of a bus, see Figure 9. The apertures 9 are spaced apart along the length of the upper and lower members 6, 7.

[0166] Each panel 10 is installed on a pair of upright members 8 via one or more supporting units 13’. Each upright member 8 has one or more apertures to receive the supporting units13’ to fix the panel 10 on it. The apertures are spaced apart along the length of the upright members 8. The supporting unit 13’ comprises rivets in this embodiment although this is exemplary only. Afterwards, a pair of upright members 8 having panels 10 mounted thereon are arranged in a single linear row or in a stacked row and installed on the mounting means 4 via supporting unit 13. The installation of upright members 8 on mounting means 6, 7 forms a display area. The upright members 8 are fixed to the upper and lower members 6, 7 by bolts 13, but other suitable fixing members or means may be used if desired.

[0167] Referring to the drawings and now to figure 9 a second embodiment of mounting assembly 24 comprises a vehicle mounted frame 24 comprising two horizontal frame members 25, 26 and an upright frame member 27 mechanically coupled to the side of the vehicle by mechanical fasteners 28. The generally C-shaped vehicle mounted frame has an open end which is left open for receiving the upright frame member 27 of the next vehicle mounted frame 24 for receiving the adjacent panel 10. A second panel supporting frame 31 comprising two horizontal frame members 32, 33 and an upright frame member 34 which are adapted to be mechanically coupled to the vehicle mounted frame 24 via mechanical fasteners 35. The panels 10 are attached to the panel supporting frame 31 by additional mechanical fasteners such as rivets. Any or all of the frame members 25, 26, 27, 33, 34 and 35 may have slots 37 removed from the members to reduce the overall weight of the mounting assembly 24. The frame members 25, 26, 27, 33, 34 and 35 are manufactured from a lightweight metal such as aluminium. Advantageously, the aluminium frame can also act as a heat sink for the LEDs.

[0168] The total depth of the digital display screen 1 and mounting means 4 is 32.1 mm. Advantageously, this is less than maximum depth that is permitted to be installed on the side of buses in the UK. Thicker arrangements may be used where regulations permit such arrangements. The total width of the vehicle as measured from one side surface to the other side surface of the vehicle and including the digital display screen 1 is less than 2,550 mm. Advantageously, this is the maximum width of a bus, double-decker bus or coach legally permitted on public roads in the UK and other countries.

[0169] The total weight of the digital display screen 1 and mounting means 4 is 120 kg. This is relatively light in weight compared to other display screens and this minimises the effect on tilt factor and does not reduce passenger capacity. Heavier digital display screens and mounting means may be used in alternative scenarios where tilt factor and passenger capacity are not of primary concern. The LEDs 2 define a display area 11. In the illustrated embodiment, the display area has a width of 6,096 mm and a height of 609.6 mm. The display area 11 therefore has a height-to-width ratio of 1 :10. In other embodiments, the display may have different widths and heights, and the height-to-width ratio need not necessarily be 1 :10.

[0170] The enclosure 3 has a frame 12 that extends around the display area 11. In the illustrated embodiment, the display area 11 and frame 12 have a width of 6,158 mm and a height of 673 mm. In other embodiments, the total width of the display area and frame may be more or less than 6, 158 mm, and the total height of the display area and frame be more or less than 673 mm.

[0171] The LEDs 2 provide a plurality of pixels, wherein each pixel is the centre point of an LED 2. In the illustrated embodiment, the density of pixels is 99,625 per m2. In other embodiments, the density of pixels may be more or less than 99,625 per m2. The LEDs are SMD1415 type and have dimensions of 1.4 x 1.5 mm. The pixel pitch, being the distance between the centre of two adjacent LEDs is 3.175 mm. The pixel pitch in other embodiments may be more or less than 3.175 mm.

[0172] Ideally, the pixel pitch, being the distance between the centre of two adjacent LEDs, is less than 10, 8, 6, or 4 mm. In one embodiment, the pixel pitch is 3.175 mm. LEDs are SMD1451. The digital display screen 1 has a display resolution of 192 x 1920.

[0173] In the illustrated embodiment, the LEDs 2 have a brightness in a range of 3500 cd to 8,000 cd per m2. The digital display screen 1 is configured to operate below the maximum light output of the LEDs 2. This minimises heat generation by the LEDs 2. The vehicle does not comprise a mechanical fan for cooling the digital display screen. Noise and electromagnetic interference associated with use of a fan is thereby avoided. The digital display screen 1 comprises a heat sink for absorbing heat generated from operation of the LEDs. The heat absorption may be achieved by using a cool air hose from the bus air-conditioner to cool the LED screen. The heat sink is integrated / embedded with the panel for absorbing heat generated by LEDs while in use. The heat sink is made of aluminium and can be provided by the housing itself.

[0174] The vehicle has an electrical power system 14, and the digital display screen 1 is powered by the electrical power system 14. The system is protected from drawing more power than a predetermined maximum permitted level set by the vehicle manufacturer via an electrical breaker system set to the predetermined maximum permitted level.

[0175] The digital display screen 1 is configured such when it is being powered on, not all panels 10 are powered on simultaneously. Instead, each panel is powered on in turn. This advantageously avoids an inductive start-up load and total power drawn from the electrical power system at any one time is reduce during powering on of the digital display screen 1 . The electrical power system 14 comprises a relay switch 15. Power is received at the relay switch 15 and is transmitted through a series of wires 16 to the panels 10. Not all panels 10 are connected to the relay switch. In the illustrated embodiment, only 7 panels 10 are directly connected to the relay switch. The remaining panels are interconnected to other panels 10 and are powered through this connection.

[0176] The digital display screen 1 further comprises a regulator set to power off the digital display screen 1 if the volume of power that is drawn by the digital display screen 1 exceeds a pre-determined limit.

[0177] The digital display screen 1 comprises a control means 17. The control means 17 can determine when the vehicle is moving and when the vehicle is static, and it can further control whether the image displayed on the digital display screen is moving or is static. The control means 17 is also configured to prevent moving images appearing on the digital display screen 1 when the vehicle is moving. A moving image on a moving vehicle may distract other drivers’ attentions, it may cause traffic accidents. Thus, the present invention prevents traffic accidents.

[0178] The control means 17 is housed in the enclosure 3 of the digital display screen 1. The control means 17 has a data processor, data storage means, and a transmitter and a receiver. The control means 17 is connectable to a cellular network and comprises a SIM card. The control means 17 is configured to transmit and receive data via the cellular network. The control means 17 is powered by an electrical wire from the relay switch 15. The control means 17 is further connected to the panels 10 by network cables 18. The panels 10 are also interconnected with one another by network cables 18.

[0179] The control means 17 comprises location software to identify the location of the digital display screen 1 and therefore of the vehicle. The control means 17 is configured to relay location data via a fully encrypted cloud-based facility. The control means is configured to back-up data.

[0180] The digital display screen 1 comprises a light sensor (not shown) configured to determine ambient brightness. The control means 17 is configured to control the brightness of the LEDs 2 and is operable to change the brightness of the LEDs 2. The LED brightness can be manually changed, but can also be set to be automatically changed in response to data received from the light sensor. Advantageously, the LED brightness can be configured to automatically dim when ambient brightness is low, and to brighten when ambient brightness is high. This thereby avoids glare on the digital display screen.

[0181] In the illustrated embodiment, the digital display screen 1 has a frame refresh rate of greater than 5,000 Hz. Advantageously, a frame refresh rate of 5,000 Hz or greater guarantees no picture distortions. In other embodiments, the digital display screen may have a frame refresh rate that is lower or higher than 5,000 Hz. The digital display screen 2 further has gold wire data connections (not shown).

[0182] Referring to the drawings and now to Figures 10 and 11 , there is illustrated a frame 40 for supporting at least two inserts 41 , 42 at spaced apart depth wise locations of the frame 40. The frame 40 having a frame dividing arrangement 43 for dividing the depth of the frame 40 and extending along all or a part of the inward facing perimeter 44 of the frame 40. The dividing arrangement 43 protrudes a short distance beyond the extent of the main perimeter frame members 45 towards the centre of the frame 40. Advantageously, the dividing arrangement 43 allows the frame 40 to simultaneously or alternately support two inserts 41 , 42 formed for fitting into and being supported by the frame 40. The dividing arrangement 43 is parallel to and spaced between a main planar rear surface and a main planar front surface of the frame 40. The frame 40 is a quadrangular frame 40 although other polygonal shapes are within the scope of the invention and the inserts 41 , 42 are advertising media inserts. The inserts 41 , 42 are print media inserts 41 and digital media inserts 42. The inserts 41 , 42 also have a quadrangular shape although other polygonal shapes are within the scope of the invention. The digital media insert 42 is a panel or digital display screen generally of the type as described above. The print media insert 41 is a poster with printed media thereon.

[0183] The dividing arrangement 43 for dividing the depth of the frame 40 is a flange 43 extending along all or a part of the inward facing perimeter 44 of the frame 40. The dividing arrangement 43 for dividing the depth of the frame 40 has the flange extending from all or a part of the inward facing perimeter frame member 46 of the frame 40. This frame member 46 is also used for the vertical sides of the frame 40. The dividing arrangement 43 divides the depth of the inward facing perimeter 44 of the frame 40 into two recesses for independently receiving the two advertising media inserts 41 , 42. One recess being proximal to the main planar rear surface 47 of the frame 40 and the other recess being proximal the main planar front surface 48 of the frame 40. The recess being proximal to the main planar rear surface 47 of the frame 40 is formed for receiving the print media insert 41 and the other recess proximal the main planar front surface 48 of the frame 40 is formed for receiving the digital media insert 42. Advantageously, the dividing arrangement 43 allows the print media insert 41 to be placed on the frame 40 at the same time as the digital media insert 42. This allows a vehicle operator to use traditional print media inserts 41 where digital media inserts 42 are not acceptable for whatever reason using the same frame 40, simply by removing the digital media insert 42 from the frame 40 thereby disclosing the already mounted print media insert 41 hidden behind the digital media insert 42. Once the vehicle enters a region where digital media inserts 42 are acceptable / allowed / authorised the digital media insert 42 is simply refitted to the frame 40 over the print media insert 41. The frame 40 is adapted to be mounted on a vehicle such as a bus 30, see Figure 11. By adapted, we mean at least the size, depth and weight of the frame 40 are so adapted to be fitted on the bus 30 to meet all relevant vehicle and road legislation.

[0184] Referring to Figure 10, the display elements 2 are embedded in a substrate 50. The LEDS 2 are embedded in the substrate 50. The display elements / LEDs 2 are embedded in a resin 50. The resin 50 is an epoxy resin. The resin 50 is matte, non-reflective resin. Advantageously, the non-reflective resin 50 does not attenuate or distort the light output. The resin 50 is black in colour. Advantageously, the LEDS 2 being embedded in the resin 50 protects the LEDS 2 from damage such as accidental contact with tree branches or traffic lights or other accidental contact with articles impinging upon the display screen 1.

[0185] Referring to the drawings and now to Figure 13 there is shown a schematic drawing of the overall control arrangement of the digital display screen 1. The digital display screen 1 comprises a control arrangement indicated generally by the reference numeral 60. The control arrangement can determine when the vehicle 30 is moving and when the vehicle is static. The control arrangement 60 is operable to control whether the image displayed on the digital display screen 1 is moving or is static. A moving image on a moving vehicle 30 may distract other drivers’ attention therefore it may cause traffic accidents. The control arrangement is configured to prevent moving images appearing on the digital display screen when the vehicle 30 is moving. Advantageously, this ensures that the vehicle conforms to legislation preventing moving images on the side of moving vehicles. It will of course be appreciated that the control arrangement can also allow moving images while the vehicle 30 is moving in certain circumstances as well. The overall control arrangement 60 of the digital display screen 1 can be operably coupled to an overall electronic / electrical / power control arrangement of the vehicle 61. The control arrangement 60 has a controller 62 optionally housed in the enclosure of the digital display screen 1. The controller 62 has a data processor 63 and data storage member 64. The controller 62 comprises a transmitter and a receiver 65. The controller 62 is connectable to a cellular network, and preferably comprises a SIM card 66. The controller 62 is configured to transmit and receive data via the cellular network. The controller has location software to identify the location of the digital display screen 1 and therefore of the vehicle 30. The controller 62 is configured to relay location data via a fully encrypted cloud-based facility and the controller is configured to back-up data.

[0186] The digital display screen system 1 has a light sensor 66 configured to determine ambient brightness. Preferably, the controller is configured to control the brightness of the LEDs 2 and is operable to change the brightness of the LEDs 2. The LED brightness can be manually changed. The LED brightness can be set to be automatically changed in response to data received from the light sensor 66. Advantageously, the LED brightness can be configured to automatically dim when ambient brightness is low, and to brighten when ambient brightness is high. This thereby avoids glare on the digital display screen and conserves energy when not required. Ideally, the system incorporates the highest output LEDs 2 achievable so that even when driving the LEDS 2 at reduced output, the control system is capable of providing the necessary brightness levels regardless of the ambient light conditions. The digital display screen 1 comprises gold wire electrical connections 67 for data transfer. The digital display screen system control arrangement may also require a computer 68. The digital display screen system control and ideally the computer also comprises a video processor. The computer 68 is a micro-pc or small form factor computer 68. The computer 68 has an operating system, preferably windows based. The operating system is compatible with a plurality of digital content production software systems such as Broadsign.

[0187] The digital display screen control arrangement 60 is operably communicative with a range of wireless telecommunications networks 73 such as 4G and / or 5G and / or 6G via a router 71. The router 71 has E Mark Certification. An E-Mark or e-Mark is a European conformity mark that proves a vehicle or vehicle component complies with regulations, laws and directives in the European Union. The E-mark certification is issued by a certified authority. The router 71 is of military grade quality.

[0188] Advantageously, the router 71 provides the added option to offer the enhancement of simultaneous connectivity for multiple independent information sources. By way of illustration, this means that multiple connections and sensors can be incorporated providing not just the basic screen system management but also that the vehicle’s performance data or its specific location can be monitored as well as environmental data such as air quality. All the information can be collated in this one unit and communicated totally securely and independently to the various relevant parties. This could include the vehicle manufacturer, the vehicle operators, relevant public and government agencies as well as the screen content providers responsible for operating and managing the general on screen display content.

[0189] The router 71 is tested for shock and vibration for vehicle and / or rail and / or military specification. The router 71 is tested to the standard SAE J 1455 (Vibration: Section 4.10.4.1 and 4.10.4.2 Cab Mount, Shock: Section 4.11.3.4 Operational Shock). The router 71 is tested to the standard EN 61373 (Shock, Vibration long-life / functional-random). The router 71 is tested to the standard MIL-STD-810G (Shock: test method 516.6. Operational Vibration: test method 514.6).

[0190] The router 71 is designed to be integrated to power sensitive vehicular based systems 61. Power draw on vehicles 30, particularly electric vehicles is crucial. Where possible, the power draw needs to be optimised and kept to a minimum. The router 71 has the lowest power draw available. The router 71 can operate in standby mode where the minimal amount of power is used. Advantageously, the router 71 is effectively asleep until required. In standby mode, where there is no activity occurring and all ports are shut down. The power draw figures in standby mode are approximately 3.9mA / 46.8mW. The router 71 can operate in multiple power modes available such as idle mode where the router 71 is connected but there is no activity. In idle mode the power draw figures are approximately 0.37A / 4.46W. The router 71 can also operate in ignition mode, where the router 71 is powered on when the vehicle 30 starts, or by setting a series of conditions that when met, will automatically start the router 71. Advantageously, these are designed to stop power being drawn unnecessarily by the router 71 when it is not in use. When the router 71 is operating under normal conditions, where the router is connected with ongoing activity, the power draw figures are approximately 0.39A / 4.70W.

[0191] The router has four input / output (I / O) ports 74 and four serial ports 75 although the numbers of ports is variable subject to local vehicular requirements. The I / O ports 74 and / or serial ports 75 are operable so as to manage and / or monitor specific events. The I / O ports 74 and / or serial port 75 are operable so as to manage and / or monitor voltage levels and / or one or more sensors, such as environmental sensors 76. The I / O ports 74 and / or serial ports 75 are operable so as to switch the router 71 on when power is applied to the I / O port. One of the ports 74 is a general purpose I / O port (GPIO). The GPIO measures voltages and voltage range.

[0192] The router 71 has two digital ports. At least one digital port 74 / 75 is capable of monitoring a circuit and responding when the circuit is opened or closed. At least one I / O port is capable of sensing power / voltage of a vehicle door for example so that the door being opened or closed presents a different condition to the I / O port. Alternatively, the door opening and closing can be sensed through the vehicle control system 61.

[0193] The router 71 has means for executing an action based on the condition presented at the at least one I / O port. The router 71 is capable of communicating the action to the computer 68 as a signal. The computer 68 has means for receiving signals from the router and running program instructions based on the received signals. The program instructions comprise instructions for displaying media content on the digital display screen 1. At least one I / O port and / or serial port are capable of coupling to at least one sensor 76, such as an environmental sensor. The data generated by the sensor 76 is transmitted to the computer 68 and / or to a remote data centre via the 4G and / or 5G and / or 6G network 73.

[0194] The router has four serial ports 75. One serial port 75 is couplable to serial devices using one or more protocols such as the RS485 and / or the RS232 protocol. A serial protocol is typically employed in rail, vehicular and industrial environments due to its multi-drop capability. The RS485 port is capable of being used for a plurality of sensors and / or serial to IP requirements. The router 71 has at least one dedicated RS485 and at least one dedicated RS232 port. The router 71 is capable of supporting up to 4 10 / 100 / 1000 Ethernet ports. The Ethernet ports are connectable to one or more Ethernet devices such as CCTV cameras or computers. The router 71 has VPN functionality. VPN is a Virtual Private Network, the method by which a connection across a public network, like the Internet, is encrypted to ensure the data is not hacked or corrupted along the way. With a VPN in place, the network connection would be completely secure and separate to any other network connection to the router. The router has a full Triple A security suite allowing the support of IT hardware providers such as Cisco and Juniper connectable using IPSecVPN or OpenVPN. The router 71 has VL N functionality. A Virtual Local Area Network is a method by which the individual Ethernet ports on the router separate the data from the other Ethernet ports, effectively creating a virtual separate network on each Ethernet port. The benefit is that an operator can run multiple customer applications across the different Ethernet ports on the router and the data is all kept separated from the other ports, even though the data is running together through the 4G and / or 5G and / or 6G network. For example, on a bus, you could have 3 different networks. One to handle the CCTV, one to handle the screen data and PC connectivity and one to handle remote support and tracking. All three networks would be managed by the router 71 independently and securely. The router 71 has a configured space comprising memory 81 and the router 71 has a processor 82. The configured space 81 is capable of storing applications and / or program scripts capable of being executed like computer based code or applications. The stored information could be the firmware and configuration data for the computer 68. The stored information is at least one custom script executable when the I / O port data reports an event, for example a door opening. The stored information is at least one custom script executable to control the screen 1 at predetermined times. The configured space 81 provides storage for a repository of images for the digital display screen 1 , for normal operation or redundancy requirements. The configured space 81 provides a means for storing custom applications and scripts thereby increasing the functionality of the system. The configured space provides a space on the router 71 that can be customised and configured. The interfaces on the Ethernet and Input / Output (I / O) interface can be disabled via the controller so as to reduce the amount of power required by the router 71. The subsystems of the router 71 such as LED’s 84, USB ports 85, GPS 86 can be managed separately via the controller for optimisation of power.

[0195] The skilled person will appreciate that all preferred or optional features of the invention described with reference to only some aspects or embodiments of the invention may be applied to all aspects of the invention.

[0196] It will be appreciated that optional features applicable to one aspect of the invention can be used in any combination, and in any number. Moreover, they can also be used with any of the other aspects of the invention in any combination and in any number. This includes, but is not limited to, the dependent claims from any claim being used as dependent claims for any other claim in the claims of this application.

[0197] In relation to the detailed description of the different embodiments of the invention, it will be understood that one or more technical features of one embodiment can be used in combination with one or more technical features of any other embodiment where the transferred use of the one or more technical features would be immediately apparent to a person of ordinary skill in the art to carry out a similar function in a similar way on the other embodiment.

[0198] The features disclosed in the foregoing description or the following drawings, expressed in their specific forms or in terms of a means for performing a disclosed function, or a method or a process of attaining the disclosed result, as appropriate, may separately, or in any combination of such features be utilised for realising the invention in diverse forms thereof as defined in the appended claims.

Claims

CLAIMS1. A digital display screen adapted to be mountable on a surface of a vehicle so as to be outwardly facing only from the vehicle, wherein the digital display screen comprises a plurality of display means that are operable to display an image on the digital display screen.

2. A digital display screen as claimed in claim 1 , wherein the display means are light emitting diodes (LEDs).

3. A digital display screen as claimed in claim 2, wherein the digital display screen further comprising an enclosure around the LEDs, the LEDs being sealed within the enclosure to prevent ingress of dust and moisture into the enclosure and towards the LEDs.

4. A digital display screen as claimed in claim 3, wherein the enclosure is configured to prevent ingress of solid particles having a diameter of less than 1 mm.

5. A digital display screen as claimed in claim 3 or 4, wherein the enclosure is configured to prevent ingress of moisture.

6. A digital display screen as claimed in any one of claims 3 to 5, wherein the enclosure is formed at least partially from a plastic.

7. A digital display screen as claimed in any one of claims 3 to 6, wherein the enclosure has a black colour for increasing the light contrast.

8. A digital display screen as claimed in claims 1 or 2, wherein the display means is embedded in a substrate.

9. A digital display screen as claimed in claim 2, wherein the LEDS are embedded in a substrate being a resin.

10. A digital display screen as claimed in claim 9, wherein the resin is an epoxy resin.

11. A digital display screen as claimed in claim 9 or 10, wherein the resin is a matte resin and / or wherein the resin is a non-reflective resin and / or wherein the resin is black in colour.

12. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen comprises a plurality of panels, each panel comprising LEDs, and each panel being operable together to provide a single image across the plurality of panels.

13. A digital display screen as claimed in claim 12, wherein the digital display screen comprises at least 1 , 2, 4, 8, 16 or 20 panels.

14. A digital display screen as claimed in claim 12 or 13, wherein each panel may also be operable independently of the other panels.

15. A digital display screen as claimed in any one of claims 12 to 14, wherein the panel comprises at least one printed circuit board (PCB) and at least one LED wherein at least one LED is arranged on / inserted into the printed circuit board.

16. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen further comprises at least one housing.

17. A digital display screen as claimed in claim 16, wherein the digital display screen further comprises the least one housing wherein the panels are I ocated / in stalled.

18. A digital display screen as claimed in any one of the claims 12 to 16, wherein the panels or boards are mechanically fixed or adhered or glued or bonded to the housing.

19. A digital display screen as claimed in any one of the claims 17 to 18, wherein the housing is made of a material for efficiently dissipating heat and reducing the temperature of the board.

20. A digital display screen as claimed in any one of the claims 17 to 18, wherein a sealant is used on the surface of the panel to make it waterproof.

21. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen is mounted to the exterior surface of the vehicle with a mounting means.

22. A digital display screen as claimed in 21 , wherein the total depth of the digital display screen and mounting means is in a range between 50 mm and 30mm and most preferably the total depth of the digital display screen and mounting means is 32.1 mm.

23. A digital display screen as claimed in claim 21 , wherein the total weight of the digital display screen and mounting means is in a range between 200 and 90 kg.

24. A digital display screen as claimed in any one of the preceding claims, wherein the display means defines a display area and the display area has a width in a range between 0.1 m and 7 m and most preferably the display area has a width of 6,096 mm and wherein the display area has a height in a range of 100 to 700 mm and most preferably the display area has a height of 609.6 mm.

25. A digital display screen as claimed in claim 24, wherein the height-to-width ratio of the display area is in a range of 1 :1 to 1 :10.

26. A digital display screen as claimed in claim 2, wherein the LEDs provide a plurality of pixels, wherein each pixel is the centre point of an LED, the digital display screen having a density of pixels in a range of 10,000 to 100,000 per m2and the density of pixels being optimally is 99,225 per m2.

27. A digital display screen as claimed in claim 2, wherein each LED has dimensions of 1.4 x 1.5 mm.

28. A digital display screen as claimed in claim 2, wherein the pixel pitch, being the distance between the centre of two adjacent LEDs, is in a range between 10mm and 2 mm, with a preferred range of pixel pitch from 3.1 mm to 2.2mm.

29. A digital display screen as claimed in claim 28, wherein the digital display screen has a display resolution of 192 x 1920, with a pixel pitch of 3.175 mm or the digital display screen has a display resolution of 256 x 2560, with a pixel pitch of 2.38mm.

30. A digital display screen as claimed in claim 28, wherein the digital display screen has a brightness up to 5800 cd with a pixel pitch of 3.175 mm or the digital display screen has a brightness in a range of 4000 cd to 4500 cd with a pixel pitch of 2.38mm or the digital display screen has a brightness over 8000 cd with a pixel pitch of 3.81 mm.

31. A digital display screen as claimed in claim 2, wherein the LEDs have a brightness in a range between 1 ,000 and 8,000 cd per m2.

32. A digital display screen as claimed claim 2, wherein the digital display screen comprises a heat sink for absorbing heat generated from operation of the LEDs.

33. A digital display screen as claimed claim 32, wherein the heat sink is integrated / embedded with the panel for absorbing heat generated by LEDs while in use.

34. A digital display screen as claimed claim 32, wherein the heat sink is made of metal and / or is provided by the metal housing.

35. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen is powerable by the electrical power system of a vehicle upon which the digital display screen is mountable.

36. A digital display screen as claimed claim 35, wherein the primary power supply is a 12V or 24V DC power supply and wherein the power supply has a maximum load of 100 amps for vehicle applications.

37. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen is configured such that when it is being powered on, not all panels are powered on simultaneously so that each panel or a group of panels is powered on in turn.

38. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen system comprises a control means.

39. A digital display screen as claimed in claim 38, wherein the control means can determine when the vehicle is moving and when the vehicle is static.

40. A digital display screen as claimed in claim 38 or 39, wherein the control means is operable to control whether the image displayed on the digital display screen is moving or is static.

41. A digital display screen as claimed in claim 40, wherein, the control means is configured to prevent moving images appearing on the digital display screen when the vehicle is moving.

42. A digital display screen as claimed in any one of claims 38 to 41 , wherein the control means comprises a data processor and data storage means, and / or the control means comprises a transmitter and a receiver, and / or the control means is connectable to a cellular network, and preferably comprises a SIM card and / or the control means is configured to transmit and receive data via the cellular network.

43. A digital display screen as claimed in any one of claims 38 to 42, wherein the control means comprises location software to identify the location of the digital display screen and therefore of the vehicle and / or the control means is configured to relay location data via a fully encrypted cloud-based facility and / or the control means is configured to back-up data.

44. A digital display screen as claimed in any one of claims 38 to 43, wherein the digital display screen system comprises a light sensor configured to determine ambient brightness and wherein the control means is configured to control the brightness of the LEDs and is operable to change the brightness of the LEDs in response to data received from the light sensor.

45. A digital display screen as claimed in any one of claims 38 to 44, wherein the digital display screen system control means comprises a computer and / or a video processor, and / or wherein the computer is a micro-pc or small form factor computer having an operating system, preferably windows based which is compatible with a plurality of digital content production software systems.

46. A digital display screen as claimed in any one of claims 38 to 44, wherein the digital display screen system control means is operably communicative with a range of wireless telecommunications networks via a router.

47. A digital display screen as claimed in claim 46, wherein the router is optimised to be integratable with power sensitive vehicular based systems to optimise power usage.

48. A digital display screen as claimed in claim 46 or 47, wherein the router has at least one input / output (I / O) port and serial port, the I / O port and / or serial port are operable so as to manage and / or monitor voltage levels and / or one or more sensors, such as environmental sensors and / or the I / O port and / or serial port are operable so as to switch the router on when power is applied to the I / O port.

49. A digital display screen as claimed in any one of claims 46 to 48, wherein the router has at least one digital ports, wherein the at least one digital port is capable of monitoring a circuit and responding when the circuit is opened or closed.

50. A digital display screen as claimed in any one of claims 46 to 49, wherein at least one I / O port or a vehicle control system is capable of sensing power / voltage of a vehicle door so that the door being opened or closed presents a different condition to the I / O port, wherein the router has means for executing an action based on the condition presented at the at least one I / O port.

51. A digital display screen as claimed in claim 46 when dependent on claim 45, wherein the router is capable of communicating the action to the computer as a signal.

52. A digital display screen as claimed in claim 51 , wherein the computer has means for receiving signals from the router and running program instructions based on the received signals.

53. A digital display screen as claimed in any one of the preceding claims, wherein the digital display screen system is a modular plug and play system.

54. A vehicle having a digital display screen as claimed in any one of the preceding claims.

55. A vehicle as claimed in claim 54, wherein the vehicle has a top surface and front, rear and side surfaces depending downwardly from the top surface, the front surface is the leading surface when the vehicle is moving forward, with the rear surface being at an opposing end of the vehicle, the side surfaces extending between the front and rear surfaces, at least one digital display screen being mounted on one side surface,56. A vehicle as claimed in claim 55, wherein the vehicle comprises at least two digital display screens, wherein at least one is mounted on either side surface of the vehicle.

57. A vehicle as claimed in claim 55, wherein at least one digital display screen is mounted on the front surface and / or the rear surface.

58. A vehicle as claimed in any one of claims 54 to 57, wherein the vehicle is a bus, double- decker bus or coach or a utility vehicle or security vehicle or car or taxi.

59. A vehicle as claimed in any one of claim 54 to 57, wherein the total width of the vehicle as measured from one side surface to the other side surface of the vehicle and including the digital display screen is in a range of between 2.3 and 2.7 m.

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