E-bike with a visualization system

Abstract

E-bike (40) with a visualization system (1) comprising: a bicycle frame (10) with a handlebar (11); an electric drive unit (17) and a battery (12), wherein the battery (12) is configured to supply the electric drive unit (17) with electrical energy; a display unit (2) with a display (20) arranged on the bicycle frame (10) or on the handlebar (11); a camera (3) designed to capture a field of view (15) lying rearward to the direction of travel, wherein the display unit (2) is arranged to display the field of view (15) captured by the camera (3), wherein the display unit (2) is arranged to display the field of view (15) in real time, and wherein the display unit (2) is configured to display the field of view (15) captured by the camera (3) in a partial area of ​​the display (20).

Description

[0001] The present invention relates to an e-bike with a visualization system according to the preamble of the claim. Technological background

[0002] With the growing proportion of bicycles, and especially electrically assisted bicycles (e-bikes), in road traffic, the demands on their safety equipment are also increasing. Monitoring the traffic behind them is becoming increasingly important, as cyclists are regularly overtaken by motor vehicles in flowing traffic or must initiate overtaking maneuvers themselves.

[0003] A reliable overview of the traffic situation behind the cyclist significantly increases riding safety and reduces the risk of dangerous situations caused by unexpectedly approaching other road users. At the same time, consideration improves active driving decisions, for example, when changing lanes, turning left, or avoiding obstacles.

[0004] The following disclosures are known from the prior art, which deal with the recording and display of the rear traffic area by opto-electronic means.

[0005] DE102014015248A1 describes a digital rearview mirror for bicycles, featuring a rear-facing digital camera that captures images of the area behind the bicycle. The camera is integrated into a rear light and can be removed via a bracket to prevent theft. It is connected to a front-mounted display via a data transmission cable. The camera has an aperture angle of less than 60° to avoid distortion. It is powered by batteries or a dynamo.

[0006] DE102021214349A1 relates to a system for monitoring vibrations in a bicycle trailer using sensors including a camera. The camera can be attached to the trailer's chassis and directed toward the ground. It detects vibrations based on image blur or optical flow deviations. The data is evaluated by an AI-based unit. The camera can also be used to classify the surface, for example, to distinguish between asphalt and paving stones. Camera data is incorporated into the evaluation as sensor data, allowing for targeted warnings or interventions.

[0007] DE202004010481U1 discloses an optical-electronic vision device for bicycles that records the traffic behind the bicycle using a CCD camera attached to the bicycle saddle. The camera is integrated in a container with its own power supply and is connected via a cable to a display mounted on the front of the bicycle. The display is mounted in a vibration-isolated manner. Image data is transmitted in real time. Alternatively, existing displays of speedometers, cell phones, or GPS devices can be used for the display.

[0008] The state of the art has numerous disadvantages.

[0009] Firstly, existing solutions require a dedicated power supply unit for the camera, e.g., in the form of rechargeable batteries or separate chargers. This leads to higher installation effort, increased system complexity, and a lack of a redundancy concept in the event of a power failure of the camera unit.

[0010] In addition, the use of the display is often limited to the exclusive reproduction of the image data captured by the camera, which makes it impossible to simultaneously visualize additional information such as navigation instructions or speed data.

[0011] Another disadvantage is the exposed or mounted design of the camera unit, as implemented in all three versions. The camera is mounted either in a taillight, an external container, or on the chassis of a trailer. This mounting increases the risk of theft, damage from vandalism, and mechanical stress during transport or when leaning the bike against a trailer. Description of the invention

[0012] One object of the invention is to avoid at least some of the disadvantages of the prior art. In particular, it is to provide a display unit that provides the driver with a comprehensive overview of the traffic situation.

[0013] A further object of the invention is to provide a visualization system that is adapted for use on an e-bike and can functionally utilize the additional components of an e-bike compared to a conventional bicycle.

[0014] According to the present invention, these and other objects are achieved by the elements of the independent claims. Further advantageous embodiments are given in the dependent claims.

[0015] The solution according to the invention can be further improved by various embodiments, each of which is advantageous in itself and—unless otherwise stated—can be combined with one another. These embodiments and the associated advantages are discussed below.

[0016] A first aspect of the invention comprises an e-bike with a visualization system comprising a bicycle frame with a handlebar, an electric drive unit and a battery, wherein the battery is configured to supply the electric drive unit with electrical energy, a display unit with a display which is arranged on the bicycle frame or on the handlebar, a camera which is configured to capture a field of view lying rearward to the direction of travel, wherein the display unit is configured to display the field of view captured by the camera, wherein the display unit is configured to display the field of view in real time, and wherein the display unit is configured to display the field of view captured by the camera in a partial area of ​​the display.

[0017] For the purposes of this invention, the visualization system is understood to be at least the combination of a camera and a display unit. The camera is designed to capture the field of view located rearward relative to the direction of travel. This functional unit is intended to display the rear field of view captured by the camera in real time on the display unit.

[0018] The display unit, also called a display device, is a visual output element used to display the field of view captured by the rear camera and comprises a display or display module. It is preferably integrated into a recess in the bicycle frame and positioned so that it is within the rider's natural field of vision.

[0019] Alternatively, the display unit can be mounted on the handlebars, particularly when integration into the bicycle frame is not designed for, or in retrofit solutions where existing bicycles or e-bikes are to be equipped with a visualization system. Mounting it on the handlebars offers the advantage that the display unit is in the rider's direct field of vision and can be viewed without head movement. The handlebar position also allows for easy manual interaction with the display unit, for example, via touch inputs or control buttons. The unit can also be easily removed if necessary, for example, to protect against theft.

[0020] The display unit advantageously has a frame area. A particularly advantageous feature is that the frame area around the display can be used to accommodate additional functional elements, such as solar cells, status LEDs, sensors (e.g., ambient light, temperature), or control panels. The edge area can also be designed to reinforce the structure and serve as a support for cabling, seals, or connectors.

[0021] The display advantageously has a brightness of up to 1,000 nits. To further improve visibility in changing lighting conditions, the display is preferably coupled with an ambient light sensor, which automatically adjusts the display brightness to the current ambient light. This ensures optimal readability in sunlight while simultaneously avoiding glare in the dark.

[0022] The display advantageously features an anti-reflective coating that diffuses reflections. In particular, it prevents broad-area light reflections—for example, from shallow sunlight—from completely overexposing the display.

[0023] The term "visualization system" advantageously also includes the cabling required for signal and power transmission, insofar as this is functionally necessary for the operation of the camera and / or display unit. This includes, in particular, electrical cables, plug connections, shielded signal paths, or integration-specific connecting devices that complete the functional unit as a holistic system.

[0024] One advantage of the e-bike according to the invention is the use of a rear-facing camera that captures the field of view that is conventionally outside the rider's field of vision. This camera represents a significant enhancement to the safety concept, especially in urban traffic or on bike paths without rearview mirrors.

[0025] The camera's positioning and calibration are ideally designed to minimize blind spots. This allows the camera to detect and display overtaking vehicles, following cyclists, or hazards at confusing intersections, for example.

[0026] Unlike traditional rearview mirrors, which have limited viewing angles and blind spots, the camera system offers a wider field of view without manual adjustment.

[0027] For the purposes of this invention, the field of view is understood to be the spatial section visually detected by the optical detection unit—i.e., the camera—over a specific detection angle. The field of view advantageously extends rearward relative to the direction of travel of the e-bike and particularly advantageously includes the area directly behind the bike, as well as any adjacent sectors to the side, depending on the aperture angle of the camera lens.

[0028] Preferably, the field of view has a horizontal opening angle of at least 90 degrees, preferably 120 to 170 degrees, in order to also detect vehicles or persons approaching from the side in the peripheral area.

[0029] The camera is preferably designed as a digital camera with an effective image resolution in the range of at least 2 megapixels, preferably between 2 and 15 megapixels. The resolution is particularly preferred between 5 and 10 megapixels.

[0030] The frame rate is preferably in the range of 15 to 120 frames per second (FPS) to enable a smooth display of the traffic behind. The frame rate is particularly preferred to be between 20 and 40 FPS, which represents an optimal compromise between real-time capability and energy efficiency.

[0031] The aperture of the camera lens is preferably in the range of f / 1.6 to f / 3.5. An aperture of f / 2.6 is particularly preferred, as it has proven particularly effective in typical cycling lighting situations.

[0032] The horizontal aperture angle of the camera is preferably between 30° and 180°, particularly preferably between 40° and 80°, with a narrower angle facilitating image depth and object size detection, particularly for algorithmic analysis. The vertical aperture angle is preferably in the range of between 20° and 110°, particularly preferably between 25° and 60°.

[0033] The horizontal aperture angle of the camera is the angular range that extends in a horizontal plane perpendicular to the direction of travel of the e-bike 4. Similarly, the vertical aperture angle refers to the captured image area perpendicular to the horizontal, i.e., in the vertical direction. It indicates the height range above and below the camera's optical center axis that is imaged.

[0034] The focusable operating distance, ie the distance from which the camera delivers a sharp image, is preferably at least 90 cm, particularly preferably at least 20 cm.

[0035] Real-time display advantageously provides immediate, low-delay transmission and display of image data on the display unit. The latency between capturing the image content and displaying it on the screen is preferably less than 1000 milliseconds, particularly preferably less than 100 milliseconds, with this value being understood as the total delay for recording, signal processing, transmission, and display.

[0036] The camera is preferably designed as an HDR-capable digital camera, which ensures high image quality even in rapidly changing lighting conditions—such as backlighting, twilight, or tunnels. HDR technology improves the visibility of details in both very bright and very dark areas of the image, thus contributing to road safety.

[0037] The camera can also be advantageously equipped with an automatic exposure and white balance system. These functions provide adaptive image optimization in real time and guarantee a consistently good representation of the field of view on the display unit, regardless of external environmental conditions such as the position of the sun, shadows, or weather.

[0038] Particularly advantageous is the camera's mechanical or electronic image stabilization, which compensates for vibrations caused by uneven road surfaces, curbs, or driving vibrations. This significantly improves image quality and reduces visual artifacts such as blurring or flickering.

[0039] The display unit is also designed to display the field of view captured by the camera in a portion of the display.

[0040] The advantage is that the remaining display area remains available for other content, such as system information, navigation data, speed or battery status.

[0041] A further advantage lies in the clear separation of information areas: By placing the camera image in the upper third, important forward navigation or warning information is prevented from being obscured by the rearview image. This creates a structured, visually decoupled display with increased readability and reduced cognitive effort for the user.

[0042] The implementation of this partial image display is preferably carried out via a software-controlled image division within the display system, whereby the camera and interface software access defined image areas in a coordinated manner.

[0043] To implement this function, at least one graphics controller or an embedded control unit is advantageously used to process the camera signal, scale it and render it specifically to a specific section of the display area.

[0044] Advantageously, the portion of the display in which the field of view is shown is less than half of the total display area. Particularly advantageously, the field of view captured by the rear-facing camera is shown in a portion corresponding to the upper third of the display unit's display.

[0045] The field of view can be displayed in reduced resolution or scaled, with image distortions being compensated for by suitable image processing algorithms.

[0046] Alternatively, the display unit can be configured to dynamically display the camera image in an adaptive sub-area that can adapt depending on the driving situation, speed, or user input. For example, when stationary or driving slowly (e.g., <10 km / h), the camera image can be displayed enlarged, while when driving quickly, it can be automatically reduced to increase the focus on driving data.

[0047] In a particularly advantageous embodiment, the display unit is designed to use a transparency layer, which serves to superimpose additional information semi-transparently over the camera image without significantly impairing its visual recognizability. The transparency layer can be implemented on the software side using a graphical user interface (GUI), with content such as symbols, text, navigation elements, or warnings being superimposed over the video image with a defined alpha channel (e.g., 20%–60% opacity).

[0048] In a further advantageous embodiment, it is provided that the camera is electrically coupled to the battery.

[0049] This eliminates the need for a separate power source for the camera, simplifying the overall design of the visualization system and reducing weight. The electrical connection is advantageously achieved via a dedicated power cable, which is either fed directly from the battery or routed via an integrated power distribution system within the bicycle frame.

[0050] Particularly advantageous here is the use of an intermediate voltage converter, such as a DC / DC converter, which adapts the supply voltage from the e-bike's electrical system to the voltage level required by the camera. This protects the camera electronics from voltage spikes, enables stable operation at varying battery levels, and extends the camera's lifespan.

[0051] In addition, the connection to the battery can be integrated into the central energy management of the e-bike, so that the camera is only supplied with power in active riding mode or switches off automatically when the battery level is low.

[0052] In a further advantageous embodiment, the camera is integrated into a protective sheet in a rear section of the e-bike.

[0053] For the purposes of the present invention, the rear section of the e-bike refers to the structural area of ​​the e-bike located behind the bottom bracket shell, relative to the direction of travel, and functionally associated with the seat tube, rear wheel, luggage rack, or mudguard. This section includes, in particular, the seat tube itself, the seat stays, and adjacent frame elements arranged in a vertical or slightly inclined orientation between the bottom bracket and the rear wheel axle.

[0054] In this position, the field of vision can be optimally aligned to the traffic behind without being obscured by the rider themselves or by luggage or accessories (e.g., water bottle, backpack). This ensures a continuously clear view of the relevant traffic area.

[0055] By arranging it in the mudguard, the camera can be embedded discreetly, aerodynamically and space-savingly into the structure of the bike, without the need for additional mounts or external housings.

[0056] The camera is preferably housed in a specially shaped housing section of the mudguard, which provides mechanical protection while still allowing a clear view of the traffic behind. The camera is positioned so that it reliably covers the area directly behind the e-bike as well as the adjacent zones to the sides.

[0057] Another advantage is increased theft protection. Since the camera is permanently installed in the structure, it cannot be easily removed or tampered with. Furthermore, the low, central position ensures a symmetrical perspective of the rear environment, simplifying image processing and minimizing potential distortion.

[0058] The camera integrated into the fender is preferably connected to the display unit and power supply via concealed, internal cabling, which improves weather resistance and reduces the risk of cable damage. Integration into the fender also effectively protects the camera from splash water, dirt, and mechanical impacts during riding.

[0059] Alternatively, the camera can be modularly mounted on the luggage rack, seat tube, or fender. It can also be integrated into the rear light housing. The camera is then preferably connected to the display unit via a hidden or frame-integrated cable connection.

[0060] In these alternative design solutions, the camera is firmly screwed or clipped into a dedicated mount. This can be achieved, for example, via a bayonet mount or a vibration-resistant clip mount with a locking mechanism. This allows for easy maintenance or replacement in the event of repair without dismantling the entire system.

[0061] Alternatively, the camera is connected mechanically and / or electrically to the bicycle via a standardized connector system. The advantage is that the camera can be retrofitted or replaced across all models, which is cost-effective for both the end customer and the bicycle manufacturer.

[0062] In a further advantageous embodiment, it is provided that the camera has a wide-angle lens which is designed to capture the field of view with a horizontal angle of view of at least 120 degrees.

[0063] Such a detection angle enables the coverage of a much larger area than with conventional cameras or rear-view mirrors, especially the lateral traffic areas that would otherwise be outside the direct field of vision.

[0064] The expanded field of view allows the camera to detect objects approaching diagonally from behind (e.g., vehicles, e-scooters, or other bicycles) early on. This reduces the risk of collisions when changing lanes or turning.

[0065] The horizontal angle of view is preferably 130°, 150°, or up to 180°. For very high angles, the use of special fisheye lenses or aspherical lens systems may be provided. The resulting distortions can be compensated for by software correction algorithms to ensure a perspective-correct and intuitively understandable image on the display unit.

[0066] In an advantageous embodiment, the angle of view used is to be understood as the aperture angle in the sense of the present invention.

[0067] The advantage of the wide-angle range is that it can be divided into zones (left - middle - right) in order to display targeted visual warnings for objects in defined zones (e.g. warning for a vehicle in the left rear zone <1.5 m distance).

[0068] In a further advantageous embodiment, it is provided that the display is designed as a touch-sensitive touch display.

[0069] This enables direct and intuitive user interaction, for example, switching between the rearview camera, navigation display, or driving data display. Operation can also be performed while stationary, without the need for separate controls.

[0070] Particularly advantageous is the display being designed as a capacitive touchscreen that supports multi-touch inputs. This allows swipe and zoom gestures, for example, to enlarge the field of view or adjust the display without compromising driving safety.

[0071] Alternatively, the touch-sensitive surface can be designed as a resistive touchscreen to ensure reliable operation even in rain, while wearing gloves, or when dirty. This design is particularly suitable for robust e-bikes used in delivery or leisure applications.

[0072] In another advantageous embodiment, the touch display is limited to specific areas of the display unit, such as virtual buttons at the edge. This leaves the central area reserved for the rearview display and not obscured by finger movements.

[0073] Preferably, the display unit has integrated solar cells that contribute to the power supply of an additional battery, the camera, the display, or both or all of the components. This enables a partially self-sufficient power supply, reduces the load on the main battery, and extends the system runtime—especially when the engine is off or when stationary.

[0074] Particularly advantageous is the arrangement of the solar cells around the edge of the display unit or as a transparent layer above the screen. The latter allows for a dual function: incident light is used to generate power without obscuring the visible image. Ideal for direct sunlight in city traffic.

[0075] Alternatively, the display unit can feature a retractable or extendable solar panel that extends manually or automatically as needed. These options are particularly suitable for e-bikes that are stationary for extended periods, such as delivery services, travel, or breaks.

[0076] In a further advantageous embodiment, it is provided that the camera is designed to communicate wirelessly and / or wired with the display unit.

[0077] The communication is preferably bidirectional so that not only the video signal can be transmitted, but also control commands, diagnostic data or status messages can be exchanged between the camera and the display unit.

[0078] With a wired connection, data transmission is preferably carried out via shielded cable systems, e.g., via LVDS, USB, CAN bus, or Ethernet, which enables high transmission rates and low latency. This option is particularly reliable in adverse environmental conditions (e.g., rain, dirt, vibration) and is suitable for safety-critical applications.

[0079] Alternatively or additionally, the camera can communicate with the display unit via a wireless connection, preferably via Wi-Fi Direct, Bluetooth Low Energy (BLE), or Ultra Wideband (UWB). This eliminates the need for fixed cabling, reducing installation effort, increasing design freedom, and facilitating modular retrofitting.

[0080] The ability for the camera to communicate with the display unit wirelessly and / or wired offers high flexibility in system integration. A wired connection ensures stable, low-latency, and interference-resistant transmission, ideal for security-critical live image applications.

[0081] At the same time, it reduces the camera's dependence on battery power by powering it directly via the connection cable. Furthermore, the fixed connection enables reliable communication even in adverse weather or vibration conditions, which are often encountered during cycling.

[0082] The additional or alternative option of wireless communication offers decisive advantages for modular design, simplified installation, and retrofitability. Camera modules can be installed, replaced, or added without laying cables.

[0083] In a further advantageous embodiment, it is provided that the camera and / or the display unit are designed to be supplied with energy via a battery of the e-bike.

[0084] Powering the camera and / or display unit via the e-bike's battery offers the advantage of a single power source for the entire system. This eliminates the need for separate batteries or charging units for the camera unit, reducing maintenance effort and increasing operational reliability. Power can be supplied via existing supply lines or via a power management module, which efficiently regulates the components' energy requirements. Integration into the e-bike's existing electrical system also enables automatic shutdown or activation depending on the vehicle's operating status.

[0085] Preferably, the e-bike is equipped with a dedicated cable from the e-bike's main battery to the camera and display unit, with an interposed voltage converter module (e.g., DC / DC converter) providing the appropriate supply voltage. This module can also function as a protection circuit to prevent voltage spikes, short circuits, or deep discharge.

[0086] Particularly advantageous is the e-bike's intelligent energy management system. This dynamically controls the power requirements of the camera and display unit, depending, for example, on the battery level, the speed, or the e-bike's operating mode. When the battery level is low, the visualization system can switch to a power-saving mode or shut down automatically. Additionally, a buffer battery or supercapacitor can be integrated to bridge short-term power outages or operate the system briefly even when the main battery is switched off.

[0087] In a further advantageous embodiment, it is provided that the e-bike comprises a memory, wherein the camera is coupled to the memory and the memory is designed to store the field of view captured by the camera.

[0088] Coupling the camera with a storage device within the e-bike offers the advantage that the captured field of view can not only be displayed in real time, but also stored permanently or temporarily.

[0089] The memory is preferably designed as a non-volatile data storage device, i.e., a storage unit that permanently retains its data even when the power supply is switched off. Preferred designs include integrated flash modules (e.g., NOR or NAND flash), eMMC chips (embedded MultiMediaCard), compact solid-state drives (SSDs), and permanently soldered memory modules housed directly on a circuit board within the camera or display unit.

[0090] In a particularly advantageous embodiment, the memory is implemented as a removable microSD card or SD card, accessible via an accessible slot. This allows for easy manual data backup, archiving, or sharing, e.g., for accident analysis, maintenance, or documentation purposes.

[0091] The stored data can be used in a variety of ways for subsequent analysis. In the event of an accident or near-collision, the image data serves as objective documentation of the traffic situation behind the vehicle – comparable to a black box in the automotive sector.

[0092] The data preferably includes the image material captured by the camera in the form of individual images or video sequences, ideally supplemented with a timestamp to ensure chronological traceability. In addition, metadata can be stored, such as the current speed of the e-bike, the direction of travel, the GPS position (if a navigation unit is connected), the battery charge level, or the current operating mode of the visualization system.

[0093] Preferably, the memory is only activated when certain conditions occur, such as abrupt deceleration (detected via an acceleration sensor), a manual trigger, or an event flag is set in the control unit. A variant in which the memory is organized circularly is particularly preferred—i.e., older data is continuously overwritten as long as no safety-relevant event is detected. Optionally, the memory can also be read via USB or wirelessly (e.g., Bluetooth or Wi-Fi).

[0094] In addition or alternatively, a further advantageous embodiment can provide for the stored data to be transferred automatically or manually to a cloud platform or an external server. This is preferably done via a wireless interface such as Wi-Fi or mobile communications (e.g., LTE / 5G module), either directly from the e-bike or via a connected smartphone app. Storing the data in a central, external system enables location-independent evaluation, backup, and analysis.

[0095] In a further advantageous embodiment, the camera is designed to emit infrared light.

[0096] The advantage of a camera capable of emitting IR is that the rearview system remains fully functional even in darkness, twilight, or poor visibility conditions, without relying on external light sources. The invisible infrared illumination enables glare-free, continuous illumination of the rear field of view, allowing the camera to deliver clear image data even in dimly lit environments. This significantly increases road safety, especially when driving at night, in tunnels, or on poorly lit cycle paths.

[0097] The infrared light is preferably emitted via infrared light-emitting diodes (IR LEDs), which are preferably integrated directly into the camera. This creates a compact and interference-resistant design in which illumination and image capture are optimally coordinated. The IR LEDs can be arranged in a ring around the camera lens or symmetrically within the housing to ensure uniform, shadow-free illumination of the field of view.

[0098] In particularly advantageous versions, the IR LEDs are integrated into an automatically controlled night vision system that is activated depending on the ambient brightness and enables reliable visibility even in complete darkness.

[0099] Additionally, the camera can be equipped with an IR-compatible image sensor (e.g., a monochromatic CMOS sensor) specifically optimized for processing infrared light signals. Alternatively, a dual-mode sensor can be used that switches between day and night operation. This significantly expands the functionality of the rearview system, especially when driving at night, in tunnels, in fog, or on unlit cycle paths.

[0100] In a further advantageous embodiment, it is provided that the e-bike comprises a computing unit which is designed to detect objects from the detected field of view and to determine a distance to the e-bike.

[0101] This computing unit is preferably implemented as a dedicated microcontroller, SoC (System-on-Chip) or embedded AI module and uses image processing algorithms such as edge detection, motion analysis, or - in a particularly preferred form - neural networks for object recognition (e.g. vehicles, pedestrians, bicycles).

[0102] Distance detection can be performed visually, for example, via monocular image depth estimation, or, with appropriate equipment, via a stereo camera configuration or by fusion with other sensor data (e.g., ultrasound, lidar, or radar sensor). The advantage lies in the ability to detect relevant road users early and automatically analyze their approach.

[0103] Preferably, the processing unit is programmed to react in defined zones (e.g., left or right rear field) and provide the driver with situation-appropriate information – for example, through color coding, warning symbols, or acoustic signals. In a particularly preferred variant, the system can also distinguish between static and dynamic objects, so that, for example, parked vehicles are ignored while approaching vehicles are highlighted.

[0104] In an advantageous embodiment, the camera is provided with a hydrophobic coating, in particular on the outer lens element.

[0105] This reduces the adhesion of water, dirt, or other liquids. This contributes significantly to maintaining a clear view and improves the functionality of the visualization system in adverse weather conditions such as rain, fog, or splashing water.

[0106] Preferably, the camera is arranged in a weather-protected position within a recessed housing frame or behind a transparent cover plate. Character description

[0107] Embodiments of the invention are described with reference to the following figures. Shown are: Fig. 1: a schematic side view of an e-bike with a first visualization system; Fig. 2: a schematic side view of an e-bike with a second visualization system; Fig. 3A: a schematic side view of an e-bike with a third visualization system; Fig. 3B: a schematic perspective view of a mudguard with an integrated camera; Fig. 4: a schematic block diagram of a visualization system; Fig. 5A: a schematic side view of an e-bike with a fourth visualization system; and Fig. 5B: A schematic top view of an e-bike with a fourth visualization system. Implementation of the invention

[0108] Fig. 1 shows a schematic side view of an e-bike 4 with a first visualization system 1.

[0109] The e-bike 4 comprises a bicycle frame 10, which is structurally connected to a seat tube 16 and a handlebar 11. The bicycle frame 10 has a functional recess in a central section, in the area of ​​the top tube 100, in which a display unit 2 is arranged.

[0110] In addition, the e-bike 4 is equipped with an electric drive unit 17, which is designed as a so-called rear-wheel hub motor. This electric drive unit 17 is integrated directly into the hub of the rear wheel and enables direct, low-loss power transmission to the wheel.

[0111] The electric drive unit 17 is supplied with energy via a battery integrated into the bicycle frame 10, which is located in a down tube 101. This battery not only powers the electric drive unit 17, but also a display unit 2, a camera 3, and a computing unit 13 (see Fig. 4).

[0112] The recess in the top tube 100 is designed so that the display unit 2 is flush and securely mounted within the frame 10, providing mechanical protection and aerodynamically advantageous positioning. The display unit 2 is thus essentially integrated into the bicycle frame 10 and forms a visual output interface within the rider's natural field of vision.

[0113] The display unit 2 is designed as the central output element of the visualization system and has an integrated display 20. This display 20 is preferably embedded in the display unit as a flat, rectangular screen and serves to visually display the image data captured by a camera 3 as well as other driving-related information such as speed, battery status, or navigation instructions.

[0114] The Display 20 features an anti-reflective coating and adaptive brightness control via an ambient light sensor to further optimize readability in changing lighting conditions. The screen surface is covered with a scratch- and impact-resistant protective layer to protect it against mechanical impacts during daily driving.

[0115] In addition to the display 20, the display unit 2 features additional functional elements integrated into the housing and the edge area. It features capacitive controls that enable direct interaction even in humid environments or when used with cycling gloves. Additionally, status LEDs can be integrated into the display unit to signal defined system states, such as the operating mode of camera 3, the battery charge level, or the presence of a safety-relevant warning.

[0116] The edge area of ​​the display unit 2 can be provided with solar cells that contribute to the additional power supply of the camera 3 and the display 20. These solar cells can be arranged circumferentially around the display 20.

[0117] The camera 3 is designed as an analog camera and is permanently mounted on the seat tube 16 of the bicycle frame 10 below the saddle, facing backwards to the direction of travel. It is mounted using a form-fitting clip mount, which allows for stable fixation even when riding over uneven surfaces. At the same time, the mount is designed to allow for easy camera replacement or maintenance.

[0118] The camera 3 is capable of capturing a horizontal field of view 15 of at least 180 degrees and is equipped with a wide-angle lens that covers both the area directly behind the e-bike 4 and adjacent traffic areas to the sides. This allows for early detection of approaching vehicles, cyclists, or other road users in the peripheral area.

[0119] The signal is transmitted from camera 3 to display unit 2 via a shielded coaxial cable, which is routed within the bicycle frame 10 or along defined cable guides. This cable provides low-loss transmission of the analog video signal in real time and effectively protects the signal from electromagnetic interference, such as that caused by the electric drive 17, the battery 12, or external sources.

[0120] The analog signal processing within the display unit is performed by a corresponding input circuit that receives the signal and prepares it for display on the display 20. Optionally, the analog signal can be digitized before playback and post-processed using image enhancement algorithms to optimize brightness, contrast, and sharpness under changing lighting conditions.

[0121] Fig. 2 and Fig. 3A illustrates a schematic side view of an e-bike 4 with a second or third visualization system 1. The e-bikes 4 differ essentially in the position of a camera 3.

[0122] In the second visualization system 1, as shown in Fig. 2, the camera 3 is located on an upper section of a bag carrier which is mounted above the rear wheel.

[0123] The elevated camera position enables extensive monitoring of the traffic area behind the e-bike 40, including distant objects and the side edges. At the same time, a field of view 15 remains free from typical interference such as luggage or bicycle accessories, provided these are mounted below the camera lens. The camera 3 is mounted there with low vibration and is connected to a display unit 2 via a concealed cable.

[0124] In Fig. 3A shows the third visualization system 1, in which a camera 3 is mounted directly on or integrated into a rear mudguard 18 of the e-bike 4.

[0125] This low positioning of camera 3 enables particularly direct detection of the immediate area behind the e-bike 4, especially near the ground. The camera's field of view 15 is aligned to cover both the immediate lane and adjacent zones, which is particularly relevant when starting, braking, or during tight maneuvers—for example, at intersections or when merging into traffic.

[0126] In this embodiment, camera 3 is embodied as a digital camera. It has an effective image resolution of 1920×11536 pixels, making it suitable for precisely capturing even fine details in the rear field of view. The camera operates at a refresh rate of 30 frames per second (FPS), enabling a smooth display of moving objects on the display of display unit 2.

[0127] The camera's lens features an aperture of f / 2.6, ensuring a balanced ratio between light sensitivity and depth of field. This makes the camera suitable for changing lighting conditions, such as twilight or changing shadows in urban environments.

[0128] The horizontal field of view is 55°, and the vertical field of view is 41°, providing a practical section of the rear traffic area with good depth of field. These aperture angles reliably cover the area directly behind the e-bike and adjacent lanes.

[0129] Camera 3 is still configured to focus at an operating distance of at least 97 cm.

[0130] The camera 3 is structurally integrated into the rear mudguard 18 and, as shown in the Fig. 3B – slightly protrudes from its surface. It is not attached, but rather embedded as a functional component into the geometry of the mudguard 18. The integration is achieved in such a way that the camera module and its housing are inserted into a specially shaped receptacle, the outer contour of which merges seamlessly into the lines of the mudguard 18. The camera 3 is positioned slightly protruding from the mudguard, thus enabling an unobstructed, free viewing angle into the rear area without structural frame parts or the mudguard 18 itself restricting the field of view 15.

[0131] The visualization system, or System 1 for short, already features integrated performance modules that are directly connected to the display unit 2 via a high-density, multifunctional interface. This architecture includes advanced machine vision functions, including automatic lane detection and speed-adaptive assistance, which operate in real time based on the image data provided by Camera 3.

[0132] Integrated image processing units and permanently implemented AI algorithms are used to analyze traffic situations, identify road edges, and enable dynamic adjustments, for example in the event of changing road layouts or obstacles in the roadway.

[0133] In addition, System 1 incorporates radar sensors that enable enhanced rear-space monitoring and provide high-resolution distance information regardless of light or weather conditions. This radar component is functionally linked to processing unit 13.

[0134] Furthermore, communication capability with external road users and infrastructure elements is provided by a fully integrated Vehicle-to-Everything (V2X) module. This supports both DSRC (Dedicated Short-Range Communications) and C-V2X (Cellular Vehicle-to-Everything) standards and allows bidirectional data transmission, e.g., to warn of crossing vehicles, traffic light conditions, or hazard areas.

[0135] Fig. 4 illustrates a schematic block diagram of a visualization system 1. The visualization system 1 is designed to capture and process a rear field of view 15.

[0136] This system enables a real-time display of the traffic area behind an e-bike 4 (see Fig. 1 - 3). A field of view 15, which describes the area behind the e-bike 4, is continuously recorded by a camera 3 mounted on the rear section of the e-bike 4, specifically on the seat tube 16 or mudguard 18.

[0137] The camera 3 is designed to capture the rear field of view 15 with a horizontal detection angle of up to 180 degrees, allowing reliable detection of objects approaching from the side. The image data generated is transmitted in real time to a display unit 2. The display unit 2 comprises a display 20, preferably designed as a resistive touchscreen. The rear field of view 15 captured by the camera 3 is presented on this display 20 in a user-friendly manner for the driver.

[0138] For the purposes of this disclosure, real-time means that the transmission and display of the image data captured by the camera occurs without any noticeable delay, so that the user receives an immediate, up-to-date image of the rear field of view. The latency time—that is, the time between the camera capturing the image and its display on the display 20—is less than one second.

[0139] The display is shown only in a defined portion of the display unit, preferably in the upper third of the display 20, so that the remaining display area can be used for additional information such as speed, navigation, or system information. In an alternative embodiment, the portion is located in the lower third of the display 20.

[0140] This structured division prevents safety-relevant front information from being overlaid by the rear view image. Overall, the bicycle's blind spot area is significantly reduced, increasing riding safety, especially in urban areas.

[0141] System 1 includes a memory 14, which is functionally coupled to camera 3 and serves to store the image data captured by the camera. Video sequences with timestamps, as well as relevant metadata such as speed or GPS coordinates, can be recorded. This is a non-volatile data storage device in the form of a removable microSD card. The microSD card can be housed in a protected but accessible slot within the display unit.

[0142] In an alternative embodiment, the memory 14 is implemented as a permanently integrated, non-replaceable chip or eMMC memory chip on a circuit board of the camera 3.

[0143] In this embodiment, the storage function is designed as an event-driven system. An integrated processing unit continuously analyzes relevant operating parameters, such as sudden decelerations, abrupt changes in the position of the e-bike, or targeted manual inputs from the user. If such an event is detected, the associated video data—including a defined time window before and after the event—is permanently stored in the designated memory 14.

[0144] Outside of such events, memory 14 preferably operates in the so-called ring buffer mode, in which the image data is continuously recorded but cyclically overwritten to optimize storage capacity. Various storage modes can be selected via the display unit 2. For example, it is possible to set whether the camera 3 stores the image data permanently or only creates a permanent backup when an event trigger is detected.

[0145] Memory 14 can be read both via a physical interface, such as a USB port, and via wireless communication protocols such as Bluetooth or Wi-Fi. The wired USB connection enables fast, reliable data transfer to external devices such as laptops, diagnostic tools, or service units, which is particularly suitable for maintenance purposes or forensic analysis after an accident. Alternatively, access can also be wireless, for example, via a paired smartphone app that establishes the connection via Bluetooth or Wi-Fi Direct.

[0146] The visualization system 1 comprises a computing unit 13. It is designed as a central processing unit and handles the analysis and evaluation of the image data captured by the camera 3.

[0147] The computing unit 13 is implemented as a microcontroller and is designed to continuously analyze the rear field of view 15 for relevant objects. For this purpose, image processing algorithms are continuously used, which include, in particular, edge and motion detection, segmentation, and contrast and depth analysis. In a preferred embodiment, AI-based object recognition models are also used, which enable the identification of road users such as vehicles, bicycles, or pedestrians and the differentiation between static and dynamic objects.

[0148] Furthermore, the computing unit 13 is capable of calculating distances between detected objects and the e-bike based on the acquired image data. This distance estimation can be performed, for example, using monocular depth analysis or—in advanced embodiments—by merging the image data with additional sensor inputs such as ultrasound, radar, or lidar. The information obtained is classified into danger zones, such as left or right rear space sectors with a distance of less than 1.5 meters.

[0149] The results of this analysis are displayed in real time via the display unit 2, either visually, for example, through color-highlighted warning symbols, or audibly via acoustic signals. In addition, the processing unit is capable of marking safety-relevant events and storing the corresponding image data in memory 14 for permanent archiving.

[0150] In an extended version, the processing unit 13 is also networked with other system components such as warning lights, a vibration module in the handlebar, or an active driver assistance system. This coupling enables immediate response to detected hazardous situations, for example, through automated light signals to warn following road users or by activating optional brake assistance. A communication interface to mobile devices or central fleet management systems can also be provided to report safety-critical events in real time or transmit them to a cloud platform for documentation.

[0151] The present invention discloses an e-bike with a visualization system. It goes without saying that a person skilled in the art will be able to conceive numerous other embodiments in this field based on the exemplary embodiments described.

[0152] Fig.5A-5B visualize a schematic side view and top view of an e-bike 4 with a fourth visualization system 1.

[0153] A camera 3 of the visualization system 1 can capture a field of view 15 with a horizontal aperture angle of 55° (Figure 5A) and a vertical aperture angle of 41° (Figure 5B). The field of view 15 extends backward in the direction of travel and covers a defined space behind the e-bike 4. List of reference symbols 1 visualization system 2 display unit 3 Camera 4 E-Bike 10 bicycle frames 11 handlebars 12 battery 13 Computer unit 14 storage 15 Field of view 16 seat tube 17 Electric drive unit 18 mudguard 19 luggage racks 20 displays 100 top tube 101 down tube QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102014015248A1

[0005] DE 102021214349A1

[0006] DE 202004010481U1

[0007]

Claims

[1] E-bike (40) with a visualization system (1) comprising: a bicycle frame (10) with a handlebar (11); an electric drive unit (17) and a battery (12), wherein the battery (12) is configured to supply the electric drive unit (17) with electrical energy; a display unit (2) with a display (20) arranged on the bicycle frame (10) or on the handlebar (11); a camera (3) designed to capture a field of view (15) lying rearward to the direction of travel, wherein the display unit (2) is arranged to display the field of view (15) captured by the camera (3), wherein the display unit (2) is arranged to display the field of view (15) in real time, and wherein the display unit (2) is configured to display the field of view (15) captured by the camera (3) in a partial area of ​​the display (20). [2] E-bike (40) according to claim 1, wherein the camera (3) is electrically coupled to the battery (12). [3] E-bike (40) according to claim 1 or 2, wherein the camera (3) is integrated in a protective sheet (18) in a rear portion of the e-bike (40). [4] E-bike (40) according to one of the preceding claims, wherein the camera (3) has a wide-angle lens designed to capture the field of view (15) with a horizontal angle of view of at least 120 degrees. [5] E-bike (40) according to one of the preceding claims, wherein the display (20) is designed as a touch-sensitive touch display. [6] E-bike (40) according to one of the preceding claims, wherein the camera (3) is designed to communicate wirelessly and / or wired with the display unit (2). [7] E-bike (40) according to one of the preceding claims, wherein the camera (3) and / or the display unit (2) are designed to be supplied with energy via a battery of the e-bike (). [8] E-bike (40) according to one of the preceding claims, comprising a memory (14), wherein the camera (3) is coupled to the memory (14) and the memory (14) is designed to store the field of view (15) captured by the camera (3). [9] E-bike (40) according to one of the preceding claims, wherein the camera (3) is designed to emit infrared light. [10] E-bike (40) according to one of the preceding claims, further comprising a computer unit (13) which is designed to detect objects from the detected field of view (15) and to determine a distance to the e-bike (40).

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